CN219959211U - Battery monomer, battery and power consumption device - Google Patents
Battery monomer, battery and power consumption device Download PDFInfo
- Publication number
- CN219959211U CN219959211U CN202320544787.2U CN202320544787U CN219959211U CN 219959211 U CN219959211 U CN 219959211U CN 202320544787 U CN202320544787 U CN 202320544787U CN 219959211 U CN219959211 U CN 219959211U
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- Prior art keywords
- battery cell
- electrode terminal
- pressing
- flange
- hole
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- 238000003825 pressing Methods 0.000 claims abstract description 248
- 238000007789 sealing Methods 0.000 claims abstract description 90
- 238000004519 manufacturing process Methods 0.000 claims description 16
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- 229910000838 Al alloy Inorganic materials 0.000 claims description 14
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- 239000000463 material Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 abstract description 31
- 238000000034 method Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 11
- 239000012212 insulator Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 206010011469 Crying Diseases 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
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- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
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- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
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- 239000003345 natural gas Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application belongs to the technical field of sealing, and particularly relates to a battery monomer, a battery and an electric device, wherein the battery monomer comprises an electrode assembly, a shell, a sealing element, an electrode terminal and a first insulating element, the wall part of the shell comprises a body and a flanging, the body is provided with a first through hole, and the flanging is annularly arranged around the first through hole; the sealing piece is at least partially arranged around the first through hole in a surrounding mode; the electrode terminal is at least partially positioned in the space surrounded by the flanging, and the sealing element is at least partially clamped between the electrode terminal and the body; the first insulating member is positioned between the flange and the electrode terminal to separate the flange and the electrode terminal; the flanging comprises a pressing part and a first connecting part, the first connecting part is connected with the body and the pressing part, the pressing part presses the electrode terminal through the first insulating piece, so that the electrode terminal and the body clamp the sealing piece, the pressing part and the electrode terminal are at least partially overlapped along the projection of the thickness direction of the body, the pressing part can stably and reliably press the sealing piece, and the leakage risk of electrolyte is reduced.
Description
Technical Field
The application belongs to the technical field of sealing, and particularly relates to a battery monomer, a battery and an electric device.
Background
The battery cell, as a minimum unit constituting a battery, generally includes a case and an electrode assembly; the shell comprises a shell body and an end cover, the electrode assembly is arranged in the shell body, electrolyte is filled in the shell body, and the electrode assembly and the electrolyte are subjected to electrochemical reaction, so that the charge and discharge of the battery cell are realized; the end cover sealing cover is arranged on the shell and is used for sealing electrolyte in the shell. However, during actual use, the electrolyte is liable to leak, thereby affecting the performance of the battery cell.
The statements made above merely serve to provide background information related to the present disclosure and may not necessarily constitute prior art.
Disclosure of Invention
The aim of the embodiment of the utility model is that: provided are a battery cell, a battery and an electric device, including but not limited to solving the technical problem that electrolyte of the battery cell is easy to leak.
The technical scheme adopted by the embodiment of the utility model is as follows:
in a first aspect, a battery cell is provided, including an electrode assembly, a housing, a sealing member, an electrode terminal, and a first insulating member, where the housing is configured to accommodate the electrode assembly, a wall portion of the housing includes a body and a flange, the body is provided with a first through hole, the flange is annularly disposed around the first through hole, and the body and the flange are an integrated structure; the sealing piece is at least partially arranged around the first through hole in a surrounding mode; the electrode terminal is electrically connected with the electrode assembly, at least part of the electrode terminal is positioned in the space surrounded by the flanging, and the sealing element is at least partially clamped between the electrode terminal and the body; the first insulating member is positioned between the flange and the electrode terminal to separate the flange and the electrode terminal; the flanging comprises a pressing part and a first connecting part, the first connecting part is connected with the body and the pressing part, the pressing part presses the electrode terminal through the first insulating piece, so that the electrode terminal and the body clamp the sealing piece, and the projections of the pressing part and the electrode terminal along the thickness direction of the body are at least partially overlapped.
According to the battery cell, the flanging pressing part presses the electrode terminal through the first insulating piece, so that the electrode terminal and the body clamp the sealing piece to realize sealing at the electrode terminal; meanwhile, the projection of the pressing part and the electrode terminal along the thickness direction of the body is at least partially overlapped, namely, the electrode terminal is at least partially positioned between the body and the pressing part, so that the pressing part can directly press the part through the first insulating part, the pressing effect of the electrode terminal pressing sealing part is improved, the risk that the pressing part is turned outwards due to the fact that the electrode terminal is subjected to external pulling force is reduced, the sealing part can also seal between the electrode terminal and the body stably and reliably, the risk that electrolyte in the shell leaks from between the electrode terminal and the body is reduced, and the performance of a battery cell is improved.
In one embodiment, the abutment extends in the circumferential direction of the flange and forms an annular structure.
According to the battery cell, the propping part extends along the circumferential direction of the flanging and is surrounded to form the annular structure, so that the design can increase the eversion difficulty of the propping part and reduce the leakage risk.
In one embodiment, the pressing portion encloses to form the second through hole, the electrode terminal includes a flange portion and a first connection section, the first connection section is arranged in the second through hole in a penetrating manner, the flange portion is arranged on the peripheral wall of the first connection section in a surrounding manner, the flange portion is located in a space enclosed by the flanging, the first insulating piece is located at least partially between the flange portion and the pressing portion, and the sealing piece is located at least partially between the first connection section and the body.
According to the battery cell, the pressing part can press the flange part, so that the whole periphery of the pressing electrode terminal can be pressed, the pressing part can press the sealing piece more stably and reliably, and the leakage risk is reduced. This results in the peripheral edge of the electrode terminal.
In one embodiment, the electrode terminal further comprises a second connecting section, one end of which is connected with the end of the first connecting section facing away from the pressing part; the sealing piece encloses and closes and form the third through-hole, and the second linkage segment wears to locate the third through-hole.
According to the battery cell, the second connecting section penetrates through the third through hole, so that the electrode assembly and the second connecting section can be electrically connected conveniently, and electric energy input and output of the battery cell are achieved.
In one embodiment, the second through hole has a diameter D1, the flange portion has an outer diameter D1, wherein,and/or->
The battery cell according to the embodiment of the present application,the part of the pressing part, which directly presses against the electrode terminal through the first insulating piece, has a certain pressing area, and the pressing part can stably press the electrode terminal, so that the leakage risk is reduced;so that the aperture of the second through hole is suitable, and the cross-sectional area of the first connecting section is suitable, so that the electrode terminal has Has good overcurrent capability.
In one embodiment, the aperture of the second through hole is D1, and the outer diameter of the flange part is D1, wherein D1-D1 is more than or equal to 0.8mm; and/or D1-D1 is less than or equal to 3mm.
According to the battery monomer provided by the embodiment of the application, D1-D1 is more than or equal to 0.8mm, so that the length of the pressing part extending towards the first connecting section is long, the risk of eversion of the pressing part is small, the sealing reliability is good, and the leakage risk is small; d1-D1 is less than or equal to 3mm, the length of the pressing part extending towards the first connecting section is proper, the flanging is simple to manufacture and bend, and the processing and the manufacturing are convenient.
In one embodiment, the second through hole has a diameter D1 and the first connecting section has an outer diameter D2, wherein D1-D2 is 0.5mm or more and/or D1-D2 is 2.5mm or less.
According to the battery monomer provided by the embodiment of the application, D1-D2 is more than or equal to 0.5mm, so that a certain interval is formed between the inner wall of the second through hole and the outer peripheral wall of the first connecting section, and the interval can accommodate the part of the first insulating piece with a certain thickness so as to reduce the creepage risk of the first connecting section; d1-d2 is 2.5mm or less, so that the outer diameter of the first connecting section 122 can be set large enough so that the electrode terminal 120 has good overcurrent capability.
In one embodiment, the first connecting portion is disposed around the first insulating member and has a fourth through hole, wherein the fourth through hole has a diameter D2, and the flange portion has an outer diameter D1, wherein D2-D1 is greater than or equal to 0.5mm, and/or D2-D1 is greater than or equal to 2.5mm.
According to the battery monomer provided by the embodiment of the application, D2-D1 is more than or equal to 0.5mm, a certain interval is formed between the inner wall of the fourth through hole and the outer peripheral wall of the flange part, and the part of the first insulating piece positioned in the interval is provided with a certain thickness, so that the risk of short circuit caused by breakdown of foreign matters such as metal burrs and the like on the part can be reduced; D2-D1 is less than or equal to 2.5mm, so that the force arm of eversion of the pressing part is not too large, the eversion risk of the pressing part is small, and the leakage risk of electrolyte is small.
In one embodiment, the first insulating member includes a first insulating portion and a second insulating portion connected to each other, and the first insulating portion is wrapped around the flange portion; the second insulating part is positioned between the inner wall of the second through hole and the outer peripheral wall of the first connecting section, and the pressing part presses the surface of the first insulating part, which is opposite to the body.
According to the battery cell provided by the embodiment of the application, the flange part and the flange part can be isolated by the first insulating part, and the first connecting section and the pressing part can be isolated by the second insulating part, so that the isolation and insulation of the flange and the electrode terminal can be realized.
In one embodiment, the second insulating portion protrudes out of the surface of the pressing portion facing away from the body; or the surface of the second insulating part facing away from the body is flush with the surface of the pressing part facing away from the body.
The battery monomer provided by the embodiment of the application can reduce the creepage risk.
In an embodiment, the abutment at least partially overlaps with a projection of the seal in the thickness direction of the body.
According to the battery cell provided by the embodiment of the application, the sealing element is at least partially positioned between the body and the pressing part, so that the pressing part can directly press the part of the sealing element positioned between the body and the pressing part through the first insulating element and the electrode terminal, the pressing effect of the sealing element can be improved, and the leakage risk is reduced.
In an embodiment, the pressing portion is formed by bending a portion of the flange toward the axis of the first through hole.
According to the battery cell provided by the embodiment of the application, one part of the flanging is bent to form the pressing part, and the pressing part is simple to process and manufacture.
In one embodiment, the brinell hardness of the abutment is in the range of 10HBW to 100HBW.
The battery cell of the embodiment of the application limits the Brinell hardness range of the pressing part within the range, so that the pressing part has enough hardness to press the electrode terminal, and the flanging can be bent to form the pressing part.
In one embodiment, the material of the abutment comprises an aluminium alloy.
According to the battery cell, the pressing part is made of the aluminum alloy, so that on one hand, the aluminum alloy is easy to obtain and low in price, and the manufacturing cost of the shell is reduced; on the other hand, the aluminum alloy also has proper hardness to meet the bending forming and compacting requirements of the pressing part.
In one embodiment, the thickness of the first connection portion is greater than or equal to 0.8mm; and/or the thickness of the first connecting portion is less than or equal to 1.5mm.
According to the battery cell provided by the embodiment of the application, the thickness of the first connecting part is greater than or equal to 0.8mm, the first connecting part has good structural strength, and the pressing part can be stably supported, so that the risk of eversion of the pressing part is reduced. The thickness h1 of the first connecting portion 1121 is less than or equal to 1.5mm, so that the thickness of the first connecting portion 1121 is not too large, material accumulation can be reduced, volume is reduced, and volume utilization rate is improved.
In one embodiment, the thickness of the pressing portion is greater than or equal to 0.8mm; and/or the thickness of the pressing part is less than or equal to 1.5mm.
According to the battery cell, the thickness of the pressing part is larger than or equal to 0.8mm, the pressing part has a certain thickness, and the pressing part is difficult to deform, so that the pressing part is pressed on the electrode terminal, the outward turning resistance of the pressing part is good, and the electrolyte risk is reduced; the thickness h2 of the pressing part is smaller than or equal to 1.5mm, so that the thickness of the pressing part is not too large, the influence on the sizes of other components such as an electrode terminal and the like is small, the volume of a battery cell is reduced, and the energy density of the battery is improved.
In an embodiment, the flange further includes a second connecting portion, the second connecting portion connects the first connecting portion and the pressing portion, and a chamfer surface is configured on a surface of the second connecting portion facing away from the electrode terminal.
The arrangement of the chamfer angle surface of the battery cell is beneficial to the bending processing of the flanging, and in the processing process, the tool is better controlled by the reverse acting force, so that the flanging bending processing is simple and quick.
In one embodiment, the angle between the chamfer and the axis of the flange is in the range of 30 ° to 60 °.
In the battery cell provided by the embodiment of the application, the included angle alpha between the chamfer surface and the axis of the flanging is set in the range, the structural strength of the second connecting part is good, and the pressing part is not easy to evert.
In an embodiment, a ratio of a dimension of the chamfer surface in a thickness direction of the first connection portion to a thickness of the first connection portion is greater than or equal to 0.3; and/or the ratio of the dimension of the chamfer angle surface in the thickness direction of the connecting portion to the thickness of the connecting portion is less than or equal to 0.6.
In the battery cell according to the embodiment of the application, the ratio of the dimension of the chamfer surface in the thickness direction of the first connecting portion to the thickness of the first connecting portion is greater than or equal to 0.3, and the chamfer surface has a large area, so that the flanging 112 is convenient to process. The ratio of the dimension of the chamfer angle surface in the thickness direction of the first connecting portion to the thickness of the first connecting portion is less than or equal to 0.6; so set up, chamfer angle face can not excessively incline towards first connecting portion for second connecting portion have good structural strength, and the structural strength of turn-ups is good, reducible weeping risk.
In an embodiment, a ratio of a dimension of the chamfer surface in a thickness direction of the pressing portion to a thickness of the pressing portion is greater than or equal to 0.3; and/or the ratio of the dimension of the chamfer angle surface in the thickness direction of the pressing portion to the thickness of the pressing portion is less than or equal to 0.6.
According to the battery cell provided by the embodiment of the application, the ratio of the size of the chamfer angle surface in the thickness direction of the pressing part to the thickness of the pressing part is greater than or equal to 0.3; the area of the chamfer angle surface is large, so that flanging is convenient. The ratio of the dimension of the chamfer angle surface in the thickness direction of the pressing part to the thickness of the pressing part is less than or equal to 0.6; so set up, chamfer angle face can not excessively be towards supporting the portion slope of pressing for second connecting portion has good structural strength, and the structural strength of turn-ups is good, reducible weeping risk.
In an embodiment, the flange further comprises a third connecting portion, the third connecting portion being connected between the body and the first connecting portion; the surface of the third connecting part facing away from the electrode terminal is configured with a rounded corner surface.
According to the battery cell, the arrangement of the chamfer angle surface can reduce stress concentration at the joint of the flanging and the body, and reduce the fracture risk of the flanging and the body.
In one embodiment, the radius of the rounded corner surface is greater than or equal to 0.4mm.
According to the battery cell provided by the embodiment of the application, the radius of the chamfer angle surface is larger than or equal to 0.4mm, so that the third connecting part has a certain thickness, and the fracture risk is reduced.
In an embodiment, an auxiliary groove is formed on a surface of the body, facing away from the flange, and the auxiliary groove is arranged opposite to the flange and is used for assisting in manufacturing the flange.
According to the battery monomer provided by the embodiment of the application, the auxiliary groove is pressed out of the body, so that the convex structure can be obtained, and the operation of pressing the convex structure to manufacture the flanging is simple.
In one embodiment, the auxiliary groove has a groove depth H1, and the height difference between the pressing portion and the body is H2, wherein,
the battery cell of the embodiment of the application is prepared byThe ratio between the groove depth of the auxiliary groove and the height difference between the pressing part and the body is limited, so that the auxiliary groove has enough groove depth, and the height of the protruding structure protruding out of the body is also high enough, so that the flange can be conveniently obtained by extrusion processing.
In one embodiment, the housing includes a shell and an end cap that covers an opening of the shell; the wall of the end cap or housing forms the wall of the housing.
The battery cell of the embodiment of the application can be provided with the electrode terminal, the sealing member and other parts on the wall part of the end cover or the shell.
In a second aspect, a battery is provided, including the battery cell described above.
The battery provided by the embodiment of the application adopts the battery monomer, so that the leakage risk of the battery monomer is small, and the performance and the use reliability of the battery are good.
In a third aspect, an electrical device is provided, comprising a battery as described above.
The power utilization device provided by the embodiment of the application adopts the battery, so that the leakage risk of the battery is small, and the performance and the use reliability of the power utilization device are good.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a vehicle according to an embodiment of the application.
Fig. 2 is a schematic structural diagram of a battery according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a battery cell according to an embodiment of the application.
Fig. 4 is an exploded view of a battery cell according to an embodiment of the application.
Fig. 5 is a schematic view of the housing of fig. 4 after the housing is hidden.
Fig. 6 is a cross-sectional view taken along line A-A in fig. 5.
Fig. 7 is a partial enlarged view at B in fig. 6.
Fig. 8 is an exploded view of the housing of fig. 4 after the housing is hidden.
Fig. 9 is a schematic structural view of the end cap of fig. 8.
Fig. 10 is a cross-sectional view taken along line D-D in 9.
Fig. 11 is a partial enlarged view at E in fig. 10.
Fig. 12 is a partial enlarged view of F in fig. 11.
Fig. 13 is a schematic structural view of the electrode terminal of fig. 8.
Fig. 14 is a sectional view taken along line G-G in fig. 13.
Wherein, each reference sign in the figure:
1000. a vehicle; 1100. a battery; 1200. a controller; 1300. a motor; 10. a case; 11. a first portion; 12. a second portion; 20. a battery cell; 100. a housing; 110. an end cap; 111. a body; 1111. a first through hole; 1112. an auxiliary groove; 112. flanging; 1121. a first connection portion; 1122. a pressing part; 1123. a second connecting portion; 1124. a third connecting portion; 1101. a second through hole; 1102. a fourth through hole; 11231. chamfer angle surface; 11241. chamfering the corner surface; 120. an electrode terminal; 121. a flange portion; 122. a first connection section; 123. a second connection section; 130. a seal; 131. a third through hole; 140. a first insulating member; 141. a first insulating portion; 142. a second insulating portion; 150. a second insulating member; 160. an electrical connection; 170. a pressure release mechanism; 180. a housing; 200. an electrode assembly; 300. and a third insulating member.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
In the description of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present application, it should be noted that the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone.
It should be further noted that, in the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Currently, the more widely the battery is used in view of the market development situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.
The battery cell, as a minimum unit constituting a battery, generally includes a case and an electrode assembly; the shell comprises a shell body and an end cover, the electrode assembly is arranged in the shell body, electrolyte is filled in the shell body, and the electrode assembly and the electrolyte are subjected to electrochemical reaction, so that the charge and discharge of the battery cell are realized; the end cover sealing cover is arranged on the shell and is used for sealing electrolyte in the shell. However, during actual use, the electrolyte is liable to leak, thereby affecting the performance of the battery cell.
One of the reasons for the easy leakage of the electrolyte is: the end cover is provided with an electrode terminal, an insulating part and a sealing part, the turned-over edge on the end cover is bent towards the electrode terminal from the end part of the end cover and is propped against the insulating part, the insulating part is propped against the electrode terminal to squeeze the sealing part, and the squeezed sealing part is deformed, so that the sealing connection between the electrode terminal and the end cover is realized; however, in the actual use process, the electrode terminal is turned over outwards easily to be turned over back to the electrode terminal under the action of external pulling force, so that the pressing force on the sealing element is insufficient, the sealing effect of the sealing element is poor, electrolyte is easy to leak from between the electrode terminal and the end cover, and the performance of the battery monomer is improved.
In order to alleviate the leakage problem of electrolyte, a battery monomer is designed, through the structure of optimizing the turn-ups for the turn-ups can reliably compress tightly electrode terminal steadily, and electrode terminal gives the sufficient pressure of sealing member, makes the sealing member can reliably form sealedly between electrode terminal and end cover, thereby reduces the leakage risk of electrolyte.
The battery monomer, the battery and the power utilization device using the battery as the power supply disclosed by the embodiment of the application can be, but are not limited to, mobile phones, flat plates, notebook computers, electric toys, electric tools, battery cars, electric automobiles, ships, spacecrafts and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.
For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 1100 is provided inside the vehicle 1000, and the battery 1100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 1100 may be used for power supply of the vehicle 1000, for example, the battery 1100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300, the controller 1200 being configured to control the battery 1100 to power the motor 1300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.
In some embodiments of the application, battery 1100 may be used not only as an operating power source for vehicle 1000, but also as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.
Referring to fig. 2, as an embodiment of a battery 1100, the battery 1100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the battery case 10. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.
In the battery 1100, the plurality of battery cells 20 may be connected in series, parallel, or a series-parallel connection between the plurality of battery cells 20, where a series-parallel connection refers to both series connection and parallel connection among the plurality of battery cells 20.
In an embodiment, the plurality of battery cells 20 may be directly connected in series, in parallel or in series-parallel, and then the whole of the plurality of battery cells 20 is accommodated in the case 10; of course, the battery 1100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole, and the battery modules are accommodated in the case 10. The battery 1100 may also include other structures, for example, the battery 1100 may also include a bus bar member for making electrical connection between the plurality of battery cells 20.
Wherein each battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery cell 20 according to some embodiments of the present application, and fig. 4 is an exploded structural diagram of the battery cell 20 according to some embodiments of the present application. The battery cell 20 refers to the smallest unit constituting the battery. As shown in fig. 3 and 4, the battery cell 20 includes a case 100, an electrode assembly 200, and other functional components, and the case 100 includes the battery cell 20 and a case 180.
The case 100 includes an end cap 110 and a case 180, and the end cap 110 refers to a member that is covered at an opening of the case 180 to isolate the inner environment of the battery cell 20 from the outer environment. Without limitation, the shape of the end cap 110 may be adapted to the shape of the housing 180 to fit the housing 180. Optionally, the end cover 110 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 110 is not easy to deform when being extruded and collided, so that the battery cell 20 can have a higher structural strength, and the safety performance can be improved. The material of the end cap 110 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.
In some embodiments, the end cap 110 may be provided with functional components such as the electrode terminal 120. The electrode terminal 120 may be electrically connected with the electrode assembly 200 through an electrical connector 160 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 110 may also be provided with a pressure relief mechanism 170 for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold. In some embodiments, the end cap 110 may also be provided with a second insulator 150, the second insulator 150 may serve to isolate the electrical connector 160 within the housing 180 from the end cap 110 to reduce the risk of short circuits; illustratively, the second insulator 150 may be plastic, rubber, or the like.
The case 180 is an assembly for cooperating with the end cap 110 to form an internal environment of the battery cell 20, wherein the formed internal environment may be used to accommodate the electrode assembly 200, electrolyte, and other components. The case 180 and the end cap 110 may be separate components, and an opening may be provided in the case 180, and the interior of the battery cell 20 may be formed by covering the opening with the end cap 110 at the opening. Specifically, the end cap 110 and the housing 180 may form a common connection surface before other components are inserted into the housing, and when the interior of the housing 180 needs to be sealed, the end cap 110 is closed to the housing 180. The housing 180 may be of various shapes and sizes, such as a cylindrical shape, a rectangular parallelepiped shape, a hexagonal prism shape, etc. Specifically, the shape of the case 180 may be determined according to the specific shape and size of the electrode assembly 200. The material of the housing 180 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. The electrode assembly 200 is coated with the third insulation member 300 such that the electrode assembly 200 is insulated from the case 180, reducing the risk of short circuits. The third insulator 300 may be a plastic film or the like, for example.
The electrode assembly 200 is a component in which an electrochemical reaction occurs in the battery cell 20. One or more electrode assemblies 200 may be contained within the case 180. The electrode assembly 200 includes a positive electrode, a negative electrode, and a separator. During charge and discharge of the battery cell 20, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in reducing the short circuit of the positive electrode and the negative electrode, and can enable active ions to pass through.
In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.
In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.
In some embodiments, the separator is a separator film. The type of the separator is not particularly limited, and any known porous separator having good chemical stability and mechanical stability can be used.
In some embodiments, the electrode assembly 200 is a rolled structure. The positive plate and the negative plate are wound into a winding structure.
In some embodiments, electrode assembly 200 is a lamination stack.
In another embodiment of the present application, there is provided a battery cell 20, as shown in connection with fig. 3 to 7, the battery cell 20 including an electrode assembly 200, a case 100, a sealing member 130, an electrode terminal 120, and a first insulating member 140, the case 100 being for accommodating the electrode assembly 200, a wall portion of the case 100 including a body 111 and a flange 112, the body 111 being provided with a first through-hole 1111, the flange 112 being annularly provided around the first through-hole 1111, the body 111 and the flange 112 being of an integrated structure; the sealing member 130 is at least partially disposed around the first through hole 1111; the electrode terminal 120 is electrically connected with the electrode assembly 200, the electrode terminal 120 is at least partially located in the space surrounded by the flange 112, and the sealing member 130 is at least partially clamped between the electrode terminal 120 and the body 111; the first insulating member 140 is positioned between the turn-up 112 and the electrode terminal 120 to separate the turn-up 112 and the electrode terminal 120; the flange 112 includes a pressing portion 1122 and a first connecting portion 1121, the first connecting portion 1121 connects the body 111 and the pressing portion 1122, and the pressing portion 1122 presses the electrode terminal 120 through the first insulator 140, so that the electrode terminal 120 and the body 111 clamp the sealing member 130, and projections of the pressing portion 1122 and the electrode terminal 120 along the thickness direction of the body 111 at least partially overlap.
The electrode assembly 200 refers to a member that generates an electrochemical reaction, and the electrode assembly 200 may have a wound structure or a laminated structure as described above.
The electrode terminal 120 refers to a part of the battery cell 20 that outputs and inputs electric power, and the electrode terminal 120 is electrically connected with the electrode assembly 200 to realize the output and input of electric power from the battery cell 20; the shape of the electrode terminal 120 may be various, for example: columnar, plate-like, block-like, etc.
The case 100 refers to a case structure for the battery cell 20, and the case 100 encloses a formed inner cavity that provides an installation space for the electrode assembly 200.
The wall portion of the housing 100, for example, as shown in fig. 3, may refer to any one of a front wall, a rear wall, a left wall, a right wall, an upper wall, or a lower wall of the housing 100.
The wall portion of the housing 100 includes a body 111 and a flange 112, the body 111 refers to a main body portion of the wall portion of the housing 100, the body 111 is provided with a first through hole 1111, and the shape of the first through hole 1111 may be various, such as a circle, an ellipse, a polygon, etc.
The flange 112 is a part protruding out of the surface of the body 111 and surrounding the first through hole 1111, and the electrode terminal 120 is at least partially located in a space surrounded by the flange 112, it being understood that the electrode terminal 120 may be partially or entirely located in the space surrounded by the flange 112; the electrode terminal 120 may be electrically connected to the electrical connector 160 through the first through hole 1111, and further electrically connected to the electrode assembly 200, so as to realize the output and input of electrical energy from the battery cell 20. For example, as shown in fig. 7, a portion (e.g., the second connection section 123) of the electrode terminal 120 facing away from the body 111 passes through the first through hole 1111 and is connected to the electrode assembly 200 by the electrical connector 160; of course, the electrical connector 160 may be electrically connected to the electrode terminal 120 after passing through the first through hole 1111. In some embodiments, a second insulator 150 is further provided between the electrical connector 160 and the body 111, the second insulator 150 separating the end cap 110 from the electrical connector 160, reducing the risk of short circuits.
The flange 112 and the body 111 are integrally formed, for example, the flange 112 and the body 111 are manufactured and molded by extrusion, injection molding, die casting and other integrated processes. The turn-up 112 may be an annular integral structure, and the turn-up 112 may also be a segmented structure looped along the circumferential direction of the electrode terminal 120. The flange 112 and the body 111 are of an integrated structure, so that the assembly process can be reduced, the cost can be saved, and the structural strength is good.
The flange 112 includes an abutting portion 1122 and a first connecting portion 1121, and the first connecting portion 1121 refers to a portion or a part of the flange 112 located between the body 111 and the abutting portion 1122; the first connecting portion 1121 serves to connect the pressing portion 1122 and the body 111, and also serves to support the pressing portion 1121. The pressing portion 1122 refers to a portion of the flange 112 that presses against the first insulating member 140, and the pressing portion 1122 may be disposed parallel to the main body 111 at intervals, or may be disposed obliquely with respect to the main body 111, and may be specifically designed according to an actual structure, and is not limited herein; the pressing portion 1122 may have an annular overall structure surrounding the electrode terminal 120, and the pressing portion 1122 may have a segmented structure surrounding the electrode terminal 120 in the circumferential direction.
The first insulating member 140 is a member made of an insulating material, and the first insulating member 140 is located between the flange 112 and the electrode terminal 120 to insulate the flange 112 from the electrode terminal 120, thereby reducing the risk of short circuit. The insulating material may include, but is not limited to, plastic, rubber.
The seal 130 is a member capable of sealing, and the seal 130 is at least partially sandwiched between the electrode terminal 120 and the body 111, and the seal 130 is capable of deforming under the pressing force of the electrode terminal 120, thereby realizing the gap seal between the body 111 and the electrode terminal 120. The seal 130 may be, but is not limited to, a gasket, a seal ring. The sealing member 130 may be partially interposed between the electrode terminal 120 and the body 111, or the entire sealing member 130 may be interposed between the electrode terminal 120 and the body 111.
The pressing part 1122 presses the electrode terminal 120 through the first insulating member 140 so that the electrode terminal 120 and the body 111 clamp the sealing member 130, and it can be understood that the pressing part 1122 presses the first insulating member 140, and the pressing part 1122 applies a pressing force to the first insulating member 140, and the pressing force presses the electrode terminal 120 so that the sealing member 130 is clamped between the electrode terminal 120 and the body 111, and the electrode terminal 120 presses the sealing member 130 toward the body 111, so that the sealing member 130 is pressed on the body 111, and the sealing member 130 is compressed and deformed after being pressed, so that the gap between the body 111 and the electrode terminal 120 can be sealed; the electrolyte in the case 180 is blocked by the sealing of the sealing member 130 after passing through the first through-hole 1111, so that it is difficult for the electrolyte to flow out of the battery cell 20 along the gap between the body 111 and the electrode terminal 120, and the leakage risk of the battery cell 20 is reduced.
The projections of the pressing portion 1122 and the electrode terminal 120 in the thickness direction of the body 111 (X direction shown in fig. 7) at least partially overlap; it is to be understood that, for example, as shown in fig. 7, a plane defined perpendicular to the direction indicated by the arrow X is a projection plane, and the projection of the pressing portion 1122 on the projection plane and the projection of the electrode terminal 120 on the projection plane may be partially or completely overlapped.
In the battery cell according to the embodiment of the application, the pressing portion 1122 of the flange 112 presses against the electrode terminal 120 through the first insulating member 140, so that the electrode terminal 120 and the body 111 clamp the sealing member 130 to achieve sealing at the electrode terminal 120; meanwhile, the projections of the pressing portion 1122 and the electrode terminal 120 along the thickness direction of the body 111 (refer to the X direction shown in fig. 7) at least partially overlap, that is, the electrode terminal 120 is at least partially located between the body 111 and the pressing portion 1122, so that the pressing portion 1122 can directly press the portion through the first insulating member 140, the pressing effect of the electrode terminal 120 to press the sealing member 130 is improved, the risk of the pressing portion 1122 turning outward due to the external pulling force applied to the electrode terminal 120 is reduced, the sealing member 130 can also seal between the electrode terminal 120 and the body 111 stably and reliably, the risk of leakage of electrolyte in the casing 100 from between the electrode terminal 120 and the body 111 is reduced, and the performance of the battery cell 20 is improved.
In another embodiment of the present application, as shown in fig. 4 to 7, the pressing portions 1122 of the battery cells 20 are provided to extend and distribute along the circumferential direction of the flange 112 and form a ring structure.
The pressing portions 1122 extend along the circumferential direction of the flange 112 and form an annular structure, and it is understood that the pressing portions 1122 have a ring shape, and the shape of the pressing portions 1122 may be various, such as a circle, an ellipse, a polygon, and the like.
According to the battery unit 20 provided by the embodiment of the application, the propping parts 1122 extend along the circumferential direction of the flange 112 and are surrounded to form an annular structure, so that the outward-turned difficulty of the propping parts 1122 can be increased, and the leakage risk can be reduced.
In another embodiment of the present application, as shown in fig. 4 to 7, 13 and 14, the pressing portion 1122 of the battery cell 20 is provided to enclose to form the second through hole 1101, the electrode terminal 120 includes the flange portion 121 and the first connecting section 122, the first connecting section 122 is disposed through the second through hole 1101, the flange portion 121 is disposed around the outer peripheral wall of the first connecting section 122, the flange portion 121 is disposed in the space enclosed by the flange 112, the first insulating member 140 is at least partially disposed between the flange portion 121 and the pressing portion 1122, and the sealing member 130 is at least partially disposed between the first connecting section 122 and the body 111.
The second through hole 1101 is a through hole formed by surrounding the pressing portion 1122, and the second through hole 1101 can be exposed to the power terminal 120, so that the power terminal 120 can be connected to an external electrical connector (e.g., a connection tab, etc.) to output or input the electrical energy of the battery cell 20. The shape of the second through hole 1101 may be various, such as a circular hole, an elliptical hole, a polygonal hole, or the like.
The first connection section 122 refers to a section of the electrode terminal 120 extending in the axial direction (refer to the X direction in fig. 7), and the first connection section 122 is inserted through the second through hole 1101, so that the first connection section 122 is conveniently connected to an external electrical connector (e.g., a connection tab, etc.) to output or input electrical energy from or to the battery cell 20. The outer peripheral wall of the first connecting section 122 is connected with the flange portion 121, the flange portion 121 is arranged around the first connecting section 122 in a surrounding mode, the flange portion 121 is located in a space surrounded by the flange 112, the first insulating member 140 is located at least partially between the abutting portion 1122 and the flange portion 121, the sealing member 130 is located at least partially between the first connecting section 122 and the body 111, the abutting portion 1122 abuts against the first insulating member 140, the first insulating member 140 abuts against the flange portion 121, and the first connecting section 122 presses the sealing member 130, so that the sealing member 130 is tightly pressed and sealed.
According to the battery cell 20 provided by the embodiment of the application, the pressing part 1122 can press the flange part 121, so that the whole periphery of the pressing electrode terminal 120 can be pressed, the pressing part 1122 can press the sealing member 130 more stably and reliably, and the leakage risk is reduced. This is so that the electrode terminal 120 is on the circumference.
In another embodiment of the present application, as shown in fig. 4 to 7, 13 and 14, the electrode terminal 120 of the battery cell 20 further includes a second connection section 123, and one end of the second connection section 123 is connected to the end of the first connection section 122 facing away from the pressing portion 1122; the sealing member 130 encloses a third through hole 131, and the second connecting section 123 is disposed through the third through hole 131.
The second connection section 123 is another section of the electrode terminal 120 extending in the axial direction (refer to the X direction in fig. 7), for example, as shown in fig. 7, the second connection section 123 is coaxially connected to the first connection section 122, the second connection section 123 is connected to an end of the first connection section 122 facing away from the pressing portion 1122, and the electrode terminal 120 has a stepped columnar shape; the sealing member 130 is arranged around the first through hole 1111 in a surrounding manner, the sealing member 130 is in an annular structure, the through hole formed by surrounding the middle of the sealing member 130 is a third through hole 131, and the second connecting section 123 is arranged in the third through hole 131 in a penetrating manner, so that the electrode assembly 200 and the second connecting section 123 can be electrically connected conveniently, and the electric energy input and output of the battery cell 20 can be realized.
In another embodiment of the present application, as shown in connection with fig. 7, 11 and 14, the second through-hole 1101 of the battery cell 20 is provided with a hole diameter D1, and the flange portion 121 has an outer diameter D1, wherein,
the battery cell 20 of the embodiment of the application is manufactured byCan limit the projected overlapping area of the pressing portion 1122 and the electrode terminal 120 in the thickness direction of the body 111 to occupy the electrode terminal 120 along the bodyThe ratio of the projected areas in the thickness direction of the electrode terminal 111 is such that the portion of the pressing portion 1122 directly pressing against the electrode terminal 120 through the first insulator 140 has a certain pressing area, and the pressing portion 112 can stably press the electrode terminal 120, thereby reducing the risk of leakage.
In some embodiments of the present application, in some embodiments,the value of (c) may be, but is not limited to, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5.
In another embodiment of the present application, as shown in connection with fig. 7, 11 and 14, the second through-hole 1101 of the battery cell 20 is provided with a hole diameter D1, and the flange portion 121 has an outer diameter D1, wherein,
the battery cell 20 of the embodiment of the present application,thus, the aperture of the second through hole 1101 is not too small, and the cross-sectional area of the first connection section 122 is not too small, so that the electrode terminal 120 has good overcurrent capability.
In some embodiments of the present application, in some embodiments,the value of (c) may be, but is not limited to, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, or 0.4.
In another embodiment of the present application, as shown in connection with fig. 7, 11 and 14, the second through-hole 1101 of the battery cell 20 is provided with a hole diameter D1, and the flange portion 121 has an outer diameter D1, wherein,/>
the battery cell 20 of the embodiment of the present application,with this arrangement, the risk of leakage is small, and the overcurrent capability of the electrode terminal 120 is good.
In some embodiments of the present application, in some embodiments,the value of (c) may be, but is not limited to, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, or 0.4.
In the actual manufacturing process, as shown in fig. 5, 6 and 7, the flange 112 is first processed on the body 111, then the end of the flange 112, which is opposite to the body 111, is bent towards the electrode terminal 120 by a tool to form the pressing portion 1122, and the pressing portion 1122 is pressed against the first insulating member 140, so as to fix the electrode terminal 120 and press the sealing member 130; under the restoring force of the flange 112 and the reverse pressing force of the first insulating member 140 to the pressing portion 1122, the pressing portion 1122 tends to turn outward away from the electrode terminal 120, so that the dimension of the flange 112 is unstable.
In another embodiment of the present application, as shown in fig. 7, 11 and 14, the second through hole 1101 of the battery cell 20 is provided with a hole diameter D1, and the flange portion 121 has an outer diameter D1, wherein D1-D1 is equal to or greater than 0.8mm.
According to the battery cell 20 provided by the embodiment of the application, D1-D1 is more than or equal to 0.8mm, and the length of the pressing part 1122 extending towards the first connecting section 122 is long, so that the risk of outward turning of the pressing part 1122 back to the electrode terminal 120 is small, the manufactured turned-over edge 112 has good dimensional stability, the pressing part 1122 can be enabled to stably press the electrode terminal 120, and the risk of leakage of electrolyte from the electrode terminal 120 is reduced.
In some embodiments, the value of D1-D1 may be, but is not limited to, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.5mm, or 4mm.
In another embodiment of the present application, as shown in connection with fig. 7, 11 and 14, the second through-hole 1101 of the battery cell 20 is provided with a hole diameter D1, the outer diameter of the flange portion 121 is D1, wherein D1-D1 is equal to or less than 3mm,
the battery unit 20, D1-D1 is less than or equal to 3mm, so that the length of the pressing part 1122 extending towards the first connecting section 122 is not too long, the manufacturing and bending of the flange 112 are simple, and the processing and the manufacturing are convenient; in addition, the aperture of the second through hole 1101 formed by surrounding the pressing portion 1122 is not too small, so that the electrode terminal 120 has good overcurrent capability.
In some embodiments, the value of D1-D1 may be, but is not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3mm.
In another embodiment of the present application, as shown in fig. 7, 11 and 14, the second through hole 1101 of the battery cell 20 is provided with a hole diameter D1, and the flange portion 121 has an outer diameter D1,0.8mm < D1-D1 < 3mm.
The battery monomer 20 provided by the embodiment of the application has the advantages that the D1-D1 is smaller than or equal to 0.8mm and smaller than or equal to 3mm, the bending manufacture of the flanging 112 is simple, the pressing part 1122 can be stably pressed on the electrode terminal 120, the leakage risk of electrolyte is reduced, and the overcurrent capacity of the electrode terminal 120 is good.
In some embodiments, the value of D1-D1 may be, but is not limited to, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3mm.
In another embodiment of the present application, as shown in connection with FIGS. 7, 11 and 14, the first connecting section 122 of the battery cell 20 is provided with an outer diameter D2, wherein D1-D2 is 0.5mm or more.
The battery unit 20 according to the embodiment of the application has the structure that the dimension D1-D2 is greater than or equal to 0.5mm, and is arranged such that a certain interval is formed between the inner wall of the second through hole 1101 and the outer peripheral wall of the first connecting section 122, and the interval can accommodate a portion (the second insulating portion 142) of the first insulating member 140 with a certain thickness, so as to reduce the creepage risk of the first connecting section 122.
In some embodiments, the value of D1-D2 may be, but is not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3mm.
In another embodiment of the present application, as shown in connection with fig. 7, 11 and 14, the first connection section 122 of the battery cell 20 is provided with an outer diameter D2, wherein D1-D2 is 2.5mm or less.
The battery monomer 20 of the embodiment of the application has the D1-D2 of less than or equal to 2.5mm, and the arrangement can ensure that the outer diameter of the first connecting section 122 can be set to be large enough, so that the electrode terminal 120 has good overcurrent capacity; if the value of D1-D2 is set too large, the outer diameter of the first connection section 122 may be too small, and the overcurrent capacity of the electrode terminal 120 may be poor.
In some embodiments, the value of D1-D2 may be, but is not limited to, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm.
In another embodiment of the present application, as shown in connection with fig. 7, 11 and 14, the first connection section 122 of the battery cell 20 is provided with an outer diameter D2, wherein 0.5mm < D1-D2 < 2.5mm.
According to the battery monomer 20 provided by the embodiment of the application, D1-D2 is smaller than or equal to 0.5mm and smaller than or equal to 2.5mm, so that the creepage risk of the first connecting section 122 is small, and the outer diameter of the first connecting section 122 is reasonable, so that the electrode terminal 120 has good overcurrent capacity.
In some embodiments, the value of D1-D2 may be, but is not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm.
In another embodiment of the present application, as shown in fig. 7, 11, 13 and 14, the first connecting portion 1121 of the battery cell 20 is provided around the first insulating member 140 and surrounds the fourth through hole 1102, the aperture of the fourth through hole 1102 is D2, and the outer diameter of the flange portion 121 is D1, wherein D2-D1 is greater than or equal to 0.5mm.
The first connecting portion 1121 is disposed around the first insulating member 140, the first connecting portion 1121 has an annular hollow structure, and a through hole formed around the first connecting portion 1121 is a fourth through hole 1102; the first connecting portion 1121 may be disposed perpendicular to the main body 111, or may be disposed obliquely with respect to the main body 111, or may be disposed perpendicularly between the first connecting portion 1121 and the pressing portion 1122, or may be disposed at an obtuse angle or an acute angle; the cross-sectional shape of the first connecting portion 1121 may be various, such as a circle, an ellipse, a polygon, or the like. The fourth through hole 1102 provides an installation space for the flange 121, the first insulator 140, the seal 130, and the like; the fourth through hole 1102 may have various shapes, for example, a circle, a polygon, an ellipse, etc.
According to the battery cell 20 provided by the embodiment of the application, D2-D1 is more than or equal to 0.5mm, so that a certain interval is formed between the inner wall of the fourth through hole 1102 and the outer peripheral wall of the flange part 121, and the part of the first insulating part 140 positioned in the interval is provided with a certain thickness, so that the risk of short circuit caused by breakdown of foreign matters such as metal burrs and the like on the part can be reduced.
In some embodiments, the value of D2-D1 may be, but is not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3mm.
In another embodiment of the present application, as shown in fig. 7, 11 and 14, the first connecting portion 1121 of the battery cell 20 is provided around the first insulating member 140 and surrounds the fourth through hole 1102, the aperture of the fourth through hole 1102 is D2, and the outer diameter of the flange portion 121 is D1, wherein D2-D1 is less than or equal to 2.5mm.
The battery unit 20 of the embodiment of the application, D2-D1 is less than or equal to 2.5mm, so that the interval between the inner wall of the fourth through hole 1102 and the outer peripheral wall of the flange 1210 is not too large, so that the distance between the reverse pressing acting force of the first insulating member 140 to the pressing part 1122 and the joint of the pressing part 1122 and the first connecting part 1121 is not too large, the moment arm of the reverse pressing acting force turning around the joint of the pressing part 1122 and the first connecting part 1121 is not too large, the risk of outward turning of the pressing part 1122 is small, and the leakage risk of electrolyte is reduced.
In some embodiments, the value of D2-D1 may be, but is not limited to, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm.
In another embodiment of the present application, as shown in fig. 7, 11 and 14, the first connecting portion 1121 of the battery cell 20 is provided around the first insulating member 140 and surrounds the fourth through hole 1102, the diameter of the fourth through hole 1102 is D2, and the outer diameter of the flange portion 121 is D1, wherein 0.5mm is equal to or less than D2-D1 is equal to or less than 2.5mm.
The battery monomer 20 provided by the embodiment of the application has the D2-D1 of which the thickness is less than or equal to 0.5mm and less than or equal to 2.5mm, and the arrangement can reduce the short circuit risk and is also beneficial to reducing the leakage risk of electrolyte.
In some embodiments, the value of D2-D1 may be, but is not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm.
In another embodiment of the present application, as shown in fig. 5, 6 and 7, the first insulating member 140 of the battery cell 20 is provided to include a first insulating portion 141 and a second insulating portion 142 connected to each other, and the first insulating portion 141 is coated on the flange portion 121; the second insulating portion 142 is located between the inner wall of the second through hole 1101 and the outer peripheral wall of the first connecting section 122, and the pressing portion 1122 presses against the surface of the first insulating portion 141 facing away from the body 111.
The first insulating portion 141 is a portion of the first insulating member 140 that is wrapped around the flange portion 121, and the first insulating portion 141 is wrapped around the flange portion 121, so that the flange portion 121 is insulated from the flange 112 by the first insulating portion 141; wherein the first insulating portion 141 may have a U-shape or L-shape in cross section to separate the flange portion 121 and the burring 112; the second insulating portion 142 refers to a portion of the first insulating member 140 penetrating the second through hole 1101, and the second insulating portion 142 is located between the inner wall of the second through hole 1101 and the outer peripheral wall of the first connecting section 122, so that the second insulating portion 142 can separate the first connecting section 122 from the pressing portion 1122, thereby realizing the separation and insulation between the flange 112 and the electrode terminal 120.
The pressing portion 1122 presses the surface of the first insulating portion 141 opposite to the main body 111, and it can be understood that the pressing portion 1122 presses the first insulating portion 141 toward the main body 111, and the first insulating portion 141 presses the flange portion 121 toward the main body 111, so as to drive the first connecting section 122 to press the sealing member 130, thereby realizing the compression seal of the sealing member 130.
According to the battery cell 20 of the embodiment of the application, the flange part 121 and the flange 112 can be separated by the first insulating part 141, and the first connecting section 122 and the pressing part 1122 are separated by the second insulating part 142, so that the electrode terminal 120 and the flange 112 are completely insulated by an insulating part, the short circuit risk is reduced, and the use reliability of the battery cell 20 is improved.
In another embodiment of the present application, as shown in fig. 7, the second insulating portion 142 of the battery cell 20 is provided to protrude from the surface of the pressing portion 1122 facing away from the body 111.
In the battery unit 20 of the embodiment of the application, the second insulating portion 142 protrudes from the surface of the pressing portion 1122 opposite to the main body 111, and the portion of the second insulating portion 142 protruding from the pressing portion 1122 increases the creepage distance and reduces the creepage risk.
In another embodiment of the present application, the surface of the second insulating portion 142 of the battery unit 20 facing away from the main body 111 is flush with the surface of the pressing portion 1122 facing away from the main body 111, and a groove structure is not formed between the pressing portion 1122 and the first connecting section 122, so that dirt is not easy to be hidden, and the risk of creepage due to dirt is reduced.
In another embodiment of the present application, the pressing portion 1122 of the battery cell 20 is provided to at least partially overlap with the projection of the seal 130 in the thickness direction of the body 111.
The projection of the pressing portion 1122 on the projection plane may be partially or completely overlapped with the projection of the sealing member 130 on the projection plane, as shown in fig. 7, for example, which defines a plane perpendicular to the direction shown by the arrow X.
In the battery cell 20 according to the embodiment of the application, the projection of the pressing portion 1122 and the sealing member 130 in the thickness direction of the body 111 (refer to the X direction in fig. 7) at least partially overlaps, that is, the sealing member 130 is at least partially located between the body 111 and the pressing portion 1122, so that the pressing portion 1122 can directly press the portion of the sealing member 130 located between the body 111 and the pressing portion 1122 through the first insulating member 140 and the electrode terminal 120, the pressing effect of the sealing member 130 is improved, the risk of the pressing portion 1122 turning outward due to the external pulling force applied to the electrode terminal 120 is reduced, the sealing member 130 can also seal between the electrode terminal 120 and the body 111 stably and reliably, and the risk of leakage of electrolyte in the case 100 from between the electrode terminal 120 and the body 111 is reduced.
In another embodiment of the present application, the pressing portion 1122 of the battery cell 20 is provided by bending a portion of the flange 112 toward the axis of the first through hole 1111.
The axis of the flange 112 is, for example, a straight line C-C shown in fig. 11.
In the battery cell 20 according to the embodiment of the application, a part of the flange 112 is bent to form the pressing portion 1122, and the pressing portion 1122 is simple to manufacture.
In another embodiment of the present application, the brinell hardness of the pressing portion 1122 of the battery cell 20 is provided in the range of 10HBW to 100HBW.
The hardness of the pressing portion 1122 is brinell hardness, and is HBW. The Brinell hardness measurement method can be implemented and obtained by referring to the measurement principle in GB/T23.1-2018.
The brinell hardness of the pressing portion 1122 of the battery cell 20 according to the embodiment of the present application ranges from 10HBW to 100HBW, and is set such that the pressing portion 1122 has a certain hardness, so that the pressing portion 1122 can stably press the electrode terminal 120, and the sealing member 130 cannot be pressed due to the easy deformation of the pressing portion 1122 caused by the too small brinell hardness of the pressing portion 1122, and the pressing portion 1122 is not easily manufactured by bending due to the too large brinell hardness and the too large setting of the pressing portion 1122.
In an embodiment, the brinell hardness of the pressure pad 1122 may be, but is not limited to, equal to 10HBW, 20HBW, 30HBW, 40HBW, 50HBW, 60HBW, 70HBW, 80HBW, 90HBW, or 100HBW.
In another embodiment of the present application, the material of the pressing portion 1122 of the battery cell 20 includes an aluminum alloy.
An aluminum alloy refers to an alloy of aluminum and a minor amount of other metals such as copper, magnesium, or manganese; illustratively, the aluminum alloy comprises the following components in percentage by mass: not less than 99.6% of aluminum, not more than 0.05% of copper, not more than 0.35% of iron, not more than 0.03% of magnesium, not more than 0.03% of manganese, not more than 0.25% of silicon, not more than 0.03% of titanium, not more than 0.05% of vanadium, not more than 0.05% of zinc, and not more than 0.03% of other single elements.
The battery unit 20 of the embodiment of the application is formed by adopting the aluminum alloy for the pressing part 1122, on one hand, the aluminum alloy is easy to obtain and has low price, thereby being beneficial to reducing the manufacturing cost of the shell 100; on the other hand, the aluminum alloy also has a suitable hardness to meet the bending and pressing requirements of the pressing portion 1122.
In another embodiment of the present application, as shown in connection with fig. 9 to 12, the thickness h1 of the first connection portion 1121 of the battery cell 20 is provided to be greater than or equal to 0.8mm.
According to the battery cell 20 provided by the embodiment of the application, the thickness h1 of the first connecting part 1121 is greater than or equal to 0.8mm, the first connecting part 1121 has a certain thickness, the first connecting part 1121 has good structural strength, and the pressing part 1122 can be stably supported, so that the risk of eversion of the pressing part 1122 is reduced, the pressing part 1122 is tightly pressed on the electrode terminal 120, the electrode terminal 120 can be stably pressed, and the risk of electrolyte leakage is reduced.
In some embodiments, the thickness h1 of the first connection 1121 may be, but is not limited to, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, or 1.7mm.
In another embodiment of the present application, as shown in fig. 9 to 12, the thickness h1 of the first connection portion 1121 of the battery cell 20 is less than or equal to 1.5mm, and the thickness h1 of the first connection portion 1121 is not too large, so that the material accumulation can be reduced, the volume can be reduced, and the volume utilization rate can be improved.
In some embodiments, the thickness h1 of the first connection 1121 may be, but is not limited to, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm.
In another embodiment of the present application, as shown in fig. 9 to 12, the thickness h1 of the first connection portion 1121 of the battery cell 20 is provided to be in the range of 0.8mm to 1.5mm, so that the first connection portion 1121 can perform a good supporting function on the pressing portion 1122, so that the pressing portion 1122 can stably press the electrode terminal 120, and the electrolyte risk is reduced; and the material accumulation can be reduced, the volume is reduced, and the volume utilization rate is improved.
In some embodiments, the thickness h1 of the first connection 1121 may be, but is not limited to, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm.
In another embodiment of the present application, as shown in fig. 9 to 12, the thickness h2 of the pressing portion 1122 of the battery cell 20 is provided to be greater than or equal to 0.8mm.
In the battery cell 20 according to the embodiment of the application, the thickness h2 of the pressing portion 1122 is greater than or equal to 0.8mm, the pressing portion 1122 has a certain thickness, and the pressing portion 1122 is difficult to deform, so that the pressing portion 1122 is pressed against the electrode terminal 120, the risk of eversion of the pressing portion 1122 is small, the capability of the pressing portion 1122 to resist eversion is good, the electrode terminal 120 can be stably pressed, and the electrolyte risk is reduced.
In some embodiments, the thickness h2 of the abutments 1122 may be, but is not limited to, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, or 1.7mm.
In another embodiment of the present application, as shown in fig. 9 to 12, the thickness h2 of the pressing portion 1122 of the battery cell 20 is provided to be less than or equal to 1.5mm.
In the battery cell 20 of the embodiment of the application, the thickness h2 of the pressing portion 1122 is smaller than or equal to 1.5mm, so that the thickness h2 of the pressing portion 1122 is not too large, the size of other components such as the electrode terminal 120 is less affected, the volume of the battery cell 20 is reduced, and the energy density of the battery 1100 is improved. For example, as shown in fig. 7, when the first connecting section 122 passes through the second through hole 1101 and is connected to an external electrical connector, if the thickness of the pressing portion 1122 is large, the height of the first connecting section 122 needs to be set larger to pass through the second through hole 1101, which increases the volume of the battery cell 20 and further reduces the energy density of the battery 1100.
In some embodiments, the thickness h2 of the abutments 1122 may be, but is not limited to, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm.
In another embodiment of the present application, as shown in fig. 9 to 12, the thickness h2 of the pressing portion 1122 of the battery cell 20 is greater than or equal to 0.8mm, and the thickness of the pressing portion 1122 is less than or equal to 1.5mm. In this way, the electrode terminal 120 can be stably pressed by the pressing portion 1122, and the risk of electrolyte can be reduced; the size of other components such as the electrode terminal 120 may also be less affected, which is advantageous for reducing the volume of the battery cell 20 and for improving the energy density of the battery 1100.
In some embodiments, the thickness h2 of the abutments 1122 may be, but is not limited to, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the battery cell 20 is provided, the flange 112 further includes a second connection portion 1123, the second connection portion 1123 connects the first connection portion 1121 and the pressing portion 1122, and a surface of the second connection portion 1123 facing away from the electrode terminal 120 is configured with a beveled surface 11231.
The second connecting portion 1123 is a bent portion of the flange 112, and connects the pressing portion 1122 and the first connecting portion 1121; for example, as shown in fig. 12, the horizontal section of the flange 112 is divided by a vertical dashed line, wherein a portion located on the left side of the vertical dashed line is the second connecting portion 1123, and a portion located on the right side of the vertical dashed line is the pressing portion 1122. The first connection portion 1121 and the second connection portion 1123 are divided by a horizontal dotted line located at the uppermost side, the portion located above the horizontal dotted line is the second connection portion 1123, and the portion located below the dotted line is the first connection portion 1121.
The chamfered surface 11231 is an inclined surface formed on the surface of the second connecting portion 1123 facing away from the electrode terminal 120, and as shown in fig. 12, for example, the chamfered surface 11231 extends obliquely upward toward the axis of the flange 112 until it contacts the top surface of the second connecting portion 1123. In the process of bending the flange 112 by using the tool to obtain the pressing portion 1122, an inclined plane matched with the chamfered surface 11231 is disposed in the tool, and the chamfered surface 11231 is obtained by extruding the flange 112 through the inclined plane, and when the inclined plane extrudes the flange 112, the acting force of the inclined plane on the flange 112 is perpendicular to the chamfered surface 11231 and faces the acting force in the flange 112, the component force of the acting force along the Y direction is beneficial to the bending of the flange 112, the tool is better controlled by the reverse acting force, and the bending of the flange 112 is simple and quick.
In another embodiment of the present application, as shown in fig. 7 and 11, the battery cell 20 is provided such that the angle α between the chamfered surface 11231 and the axis of the flange 112 is in the range of 30 ° to 60 °.
In the battery unit 20 according to the embodiment of the application, the included angle α between the chamfered surface 11231 and the axis of the flange 112 is set within the above range, and the second connecting portion 1123 has good structural strength, and the pressing portion 1122 is not easy to evert. The included angle α between the chamfered surface 11231 and the axis of the flange 112 is set too small and too large, and the chamfered surface 11231 is excessively inclined, so that the second connecting portion 1123 is weak, and the flange 112 is easily broken from the second connecting portion 1123.
In an embodiment, the included angle α between the chamfered surface 11231 and the axis of the flange 112 may be, but is not limited to, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, or 60 °.
In an embodiment, the included angle α between the chamfered surface 11231 and the axis of the flange 112 is 45 °, so that the structure of the chamfered surface 11231 is regular, and the flange 112 is convenient to process.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the ratio of the dimension L1 of the chamfered surface 11231 of the battery cell 20 in the thickness direction of the first connecting portion 1121 (see Y direction shown in fig. 12) to the thickness h1 of the first connecting portion 1121 is greater than or equal to 0.3.
The dimension L1 of the chamfered surface 11231 in the thickness direction of the first connecting portion 1121 means the dimension occupied by the chamfered surface 11231 in the thickness direction of the first connecting portion 1121.
In the battery unit 20 according to the embodiment of the application, the ratio of the dimension L1 of the chamfered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is greater than or equal to 0.3, and the chamfered surface 11231 has a large area, thereby facilitating the processing of the flange 112. If the ratio of the dimension L1 of the chamfered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is set too small, the area of the chamfered surface 11231 is small, and the effect of assisting the bending of the flange 112 cannot be obtained well.
In an embodiment, the ratio of the dimension L1 of the chamfered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 may be, but not limited to, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the ratio of the dimension L1 of the chamfered surface 11231 of the battery cell 20 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is less than or equal to 0.6; so set up, the chamfer face 11231 can not excessively incline towards first connecting portion 1121 for second connecting portion 1123 has good structural strength, and the structural strength of turn-ups 112 is good, reducible weeping risk.
In an embodiment, the ratio of the dimension L1 of the chamfered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 may be, but not limited to, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the ratio of the dimension L1 of the chamfered surface 11231 of the battery cell 20 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is provided in the range of 0.3 to 0.6; so set up, second connecting portion 1123 has good structural strength, and the structural strength of turn-ups 112 is good, reducible weeping risk, and the chamfer angle face 11231 can better supplementary turn-ups 112 buckle, turn-ups 112 processing is convenient.
In an embodiment, the ratio of the dimension L1 of the chamfered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 may be, but not limited to, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the ratio of the dimension L2 of the chamfered surface 11231 of the battery cell 20 in the thickness direction of the pressing portion 1122 (refer to the X direction in fig. 12) to the thickness h2 of the pressing portion 1122 is greater than or equal to 0.3.
The dimension L2 of the chamfered surface 11231 in the thickness direction of the pressing portion 1122 is the dimension of the chamfered surface 11231 in the thickness direction of the pressing portion 1122.
In the battery cell 20 according to the embodiment of the application, the ratio of the dimension L2 of the chamfered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is greater than or equal to 0.3; so arranged, the area of the chamfer face 11231 is large, thereby facilitating the processing of the flange 112; if the ratio of the dimension L2 of the chamfered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is set too small, the area of the chamfered surface 11231 is small, and the effect of assisting the bending of the flange 112 is not good.
In an embodiment, the ratio of the dimension L2 of the chamfered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 may be, but is not limited to, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the ratio of the dimension L2 of the chamfered surface 11231 of the battery cell 20 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is less than or equal to 0.6; by the arrangement, the chamfer surface 11231 does not excessively incline towards the pressing part 1122, so that the second connecting part 1123 has good structural strength, the flanging 112 has good structural strength, and the leakage risk can be reduced; the ratio of the dimension L2 of the chamfered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is set excessively large, and the chamfered surface 11231 excessively inclines toward the pressing portion 1122 so that the second connecting portion 1123 is thinner and is thus liable to break.
In an embodiment, the ratio of the dimension L2 of the chamfered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 may be, but is not limited to, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the ratio of the dimension L2 of the chamfered surface 11231 of the battery cell 20 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is provided in the range of 0.3-0.6; so set up, second connecting portion 1123 has good structural strength, and turn-ups 112 structural strength is good, reducible weeping risk, and the chamfer angle face 11231 can better supplementary turn-ups 112 buckle, turn-ups 112 processing is convenient.
In an embodiment, the ratio of the dimension L2 of the chamfered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 may be, but is not limited to, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6.
In another embodiment of the present application, as shown in fig. 7, 11 and 12, the flange 112 of the battery cell 20 further includes a third connecting portion 1124, and the third connecting portion 1124 is connected between the body 111 and the first connecting portion 1121; the surface of the third connection part 1124 facing away from the electrode terminal 120 is configured with a rounded corner surface 11241.
The third connecting portion 1124 refers to a portion of the flange 112 between the first connecting portion 1121 and the body 111; for example, as shown in fig. 12, the first connection portion 1121 and the third connection portion 1124 may be divided by a horizontal dotted line in the middle, the portion above the horizontal dotted line is the first connection portion 1121, and the portion below the horizontal dotted line is the third connection portion 1124. The body 111 and the third connection portion 1124 may be divided by a horizontal dotted line located at the lowest position, and a portion located below the horizontal dotted line is the body 111 and a portion located above the horizontal dotted line is the third connection portion 1124. It should be noted that, the vertical dotted line and the horizontal dotted line in the embodiment of the present application are only auxiliary lines made for illustrating the relationship between the flange 112 portions, and do not represent any structure in the actual product.
The rounded corner surface 11241 is a curved surface formed on a surface of the third connection portion 1124 facing away from the electrode terminal 120, and protrudes toward the electrode terminal 120.
The arrangement of the rounded corner face 11241 of the battery unit 20 of the embodiment of the application can reduce the stress concentration at the joint of the flange 112 and the body 111 and reduce the fracture risk of the flange 112 and the body 111.
In another embodiment of the present application, as shown in connection with fig. 7 and 11, the radius R1 of the rounded corner face 11241 of the battery cell 20 is provided to be greater than or equal to 0.4mm.
In the battery cell 20 according to the embodiment of the application, the radius R1 of the rounded corner surface 11241 is greater than or equal to 0.4mm, so that the third connecting portion 1124 has a certain thickness, and the fracture risk is reduced.
In an embodiment, radius R1 of chamfer face 11241 may be, but is not limited to, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, or 1.3mm.
In another embodiment of the present application, as shown in fig. 11, an auxiliary groove 1112 is formed on a surface of the body 111 of the battery cell 20 facing away from the flange 112, and the auxiliary groove 1112 is disposed opposite to the flange 112 and is used for assisting in manufacturing the flange 112.
The auxiliary groove 1112 refers to a groove disposed on a surface of the body 111 facing away from the flange 112 and opposite to the flange 112, wherein the auxiliary groove 1112 is disposed opposite to the flange 112, and it is understood that the projections of the auxiliary groove 1112 and the flange 112 along the thickness direction of the body 111 at least partially intersect.
In the actual processing process, before the flange 112 is processed, an auxiliary groove 1112 is pressed out on the surface of the body 111 by using a tool, after the auxiliary groove 1112 is pressed out, a protrusion structure is formed on the surface of the body 111 opposite to the auxiliary groove 1112, and then the protrusion structure is pressed again, so that the height of the protrusion structure is continuously increased, and finally the flange 112 is obtained.
In the battery unit 20 of the embodiment of the application, the auxiliary groove 1112 is pressed out of the surface of the body 111 facing away from the auxiliary groove 1112 to obtain a protruding structure, and the operation of pressing the protruding structure to manufacture the flange 112 is simple.
In another embodiment of the present application, as shown in fig. 11 and 12, the auxiliary groove 1112 of the battery cell 20 is provided with a groove depth H1, and the height difference between the pressing portion 1122 and the body 111 is H2, wherein,
the battery cell 20 of the embodiment of the application is manufactured byThe ratio between the groove depth of the auxiliary groove 1112 and the height difference between the pressing portion 1122 and the body 111 is limited so that the auxiliary groove 1112 has a sufficient groove depth and the height of the protruding structure protruding from the body 111 is also sufficiently high, so that the flange 112 can be easily obtained by press working. If->The value of (2) is too small, the groove depth of the auxiliary groove 1112 is small, the height of the protruding structure protruding from the body 111 is small, and the flange 112 is not easy to process.
In one embodiment of the present application, in one embodiment,the value of (c) may be, but is not limited to, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1 or 1.2.
In another embodiment of the present application, as shown in connection with fig. 3, a case 100 of the battery cell 20 is provided including a housing 180 and an end cap 110, the end cap 110 covering an opening of the housing 180; the end cap 110 constitutes a wall portion of the housing 100.
The end cap 110 forms a wall portion of the case 100, and it is understood that the electrode terminal 120, the first insulating member 140, the sealing member 130, and the like are mounted to the end cap 110, which facilitates the mounting of the electrode terminal 120, the first insulating member 140, the sealing member 130, and the like, and the assembly operation of the battery cell 20 is simple.
In another embodiment of the present application, as shown in connection with fig. 3, a case 100 of the battery cell 20 is provided including a housing 180 and an end cap 110, the end cap 110 covering an opening of the housing 180; the wall of the housing 180 constitutes the wall of the casing 100.
The wall portion of the case 180 constitutes the wall portion of the case 100, and it is understood that the electrode terminal 120, the first insulator 140, the seal 130, and the like are mounted to the wall portion of the case 180, wherein any one of the left wall, the right wall, the front wall, the rear wall, and the bottom wall of the case 180 may be used.
In one embodiment, as shown in connection with fig. 3 to 14, the case 100 includes a battery cell 20 and a case 180, the case 180 is configured with an opening, and the battery cell 20 includes an end cap 110, a sealing member 130, an electrode terminal 120, a first insulating member 140, a second insulating member 150, and an electrical connection member 160; the end cover 110 is provided with two flanges 112, the end cover 110 is in a strip shape, the two flanges 112 are provided with two ends of the end cover 110, and two electrode terminals 120 in the two flanges 112 are respectively a positive electrode terminal and a negative electrode terminal; the positive electrode terminal and the negative electrode terminal can both adopt the same sealing mode, or can adopt different sealing modes, and the positive electrode terminal and the negative electrode terminal can be specifically selected according to actual needs.
The following description will be made taking one of the positive electrode terminal and the negative electrode terminal adopting the same sealing method as an example:
referring to fig. 3 to 5, the body 111 of the end cap 110 is covered at the opening, the body 111 and the housing 180 can be connected in a sealing manner by welding, sealing members, etc., the second insulating member 150 and the electrical connecting member 160 are located in the housing 180, and the flange 112 is located on the side of the body 111 facing away from the housing 180.
Referring to fig. 6 to 14 together, the end cover 110 includes a body 111 and a flange 112, the body 111 is provided with a first through hole 1111, the first through hole 1111 is a round hole, the flange 112 protrudes out of the surface of the body 111 and is enclosed outside the first through hole 1111, the seal member 130 is in a ring shape, the cross section of the seal member 130 is in an inverted L shape, a vertical section of the seal member 130 is inserted into the first through hole 1111, and a horizontal section of the seal member 130 is annularly arranged around the first through hole 1111 and is located in a space enclosed by the flange 112; the electrode terminal 120 is in a stepped cylindrical shape, the electrode terminal 120 is configured with a first connecting section 122 and a second connecting section 123 which are coaxially connected, and a flange part 121 which is annularly arranged around the first connecting section 122, the second connecting section 123 passes through a third through hole 131 formed by surrounding the sealing element 130, and then passes through a second insulating element 150 to be electrically connected with the electric connecting element 160, and the second insulating element 150 is positioned between the end cover 110 and the electric connecting element 160 so as to reduce the risk of short circuit; the second insulating member 150 may be elongated and adapted to the shape of the end cap 110, and is stacked with the end cap 110, thus reducing the risk of short circuits. The electrical connector 160 is L-shaped.
The horizontal segment of the sealing member 130 is clamped between the body 111 and the first connecting segment 122, the first insulating member 140 is annular and is arranged around the electrode terminal 120 in a surrounding mode, the first insulating member 140 comprises a first insulating portion 141 and a second insulating portion 142 which are connected, the cross section of the first insulating portion 141 is U-shaped, the first insulating portion 141 is coated outside the flange portion 121, the end portion, facing away from the body 111, of the flange 112 is bent towards the electrode terminal 120 to form a pressing portion 1122, the pressing portion 1122 presses the surface, facing away from the body 111, of the first insulating portion 141, so that the pressing portion 1122 is pushed to press the horizontal segment of the sealing member 130, the horizontal segment of the sealing member 130 is pressed and sealed, the passing difficulty of electrolyte is increased, and the leakage risk is reduced. The pressing portion 1122 is in a circular ring shape, the pressing portion 1122 encloses to form a second through hole 1101, the first connecting section 122 is disposed in the second through hole 1101 in a penetrating manner, and the second insulating portion 142 is also disposed in the second through hole 1101 in a penetrating manner and located between the pressing portion 1122 and the first connecting section 122, and the first connecting section 122 protrudes out of the second through hole 1101 to facilitate connection with an external electrical connector. The second insulating portion 142 also protrudes out of the second through hole 1101 to increase the creepage distance.
The flange 112 comprises a third connecting part 1124, a first connecting part 1121, a second connecting part 1123 and a pressing part 1122, the third connecting part 1124, the first connecting part 1121, the second connecting part 1123 and the pressing part 1122 are all annular and all annular around the electrode terminal 120, the third connecting part 1124, the first connecting part 1121 and the second connecting part 1123 are sequentially and coaxially connected from top to bottom to form a hollow cylindrical structure, the third connecting part 1124 is vertically connected with the body 111, the third connecting part 1124, the first connecting part 1121, the second connecting part 1123 and the pressing part 1122 are of an integrated structure, the body 111 is provided with the flange 112 in an extrusion mode, and the end part of the flange 112, which is opposite to the body 111, is bent to form the pressing part 1122; the pressing part 1122 is arranged vertically to the first connecting part 1121, so that the structure of the flanging 112 is regular and convenient to manufacture; the surface of the second connecting portion 1123 facing away from the electrode terminal 120 is configured with a beveled surface 11231, and an included angle between the beveled surface 11231 and an axis of the flange 112 is 45 °; the surface of the third connection part 1124 facing away from the electrode terminal 120 is configured with a rounded corner surface 11241, and the rounded corner surface 11241 can reduce stress concentration and reduce fracture risk.
The surface of the body 111 facing away from the flange 112 is provided with an auxiliary groove 1112, after the auxiliary groove 1112 is pressed out on the body 111, the surface of the body 111 facing away from the auxiliary groove 1112 forms a convex structure, and then the convex structure is continuously pressed and raised, so as to form the flange 112, and then the end of the flange 112 facing away from the body 111 is bent towards the electrode terminal 120, so as to form the pressing portion 1122.
In another embodiment of the present application, as shown in connection with fig. 2, a battery 1100 is provided, comprising the above-described battery cells 20.
The battery 1100 of the embodiment of the application adopts the battery cell 20, so that the leakage risk of the battery cell 20 is small, and the performance and the use reliability of the battery 1100 are good.
Because the battery 1100 of the embodiment of the present application adopts the technical solutions of any one or several of the embodiments, the battery 1100 also has all the beneficial effects brought by the technical solutions of the embodiments, which are not described in detail herein.
In another embodiment of the present application, as shown in connection with fig. 1, an electrical device is provided, comprising a battery 1100 as described above.
The power utilization device provided by the embodiment of the application adopts the battery 1100, so that the leakage risk of the battery 1100 is small, and the performance and the use reliability of the power utilization device are good.
The power utilization device of the embodiment of the application adopts the technical scheme of any one or more embodiments, so that the power utilization device also has all the beneficial effects brought by the technical scheme of the embodiments, and the description is omitted herein.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (27)
1. A battery cell, comprising:
an electrode assembly;
the shell is used for accommodating the electrode assembly, the wall part of the shell comprises a body and a flanging, the body is provided with a first through hole, the flanging is annularly arranged around the first through hole, and the body and the flanging are of an integrated structure;
the sealing piece is at least partially arranged around the first through hole in a surrounding mode;
the electrode terminal is electrically connected with the electrode assembly, at least part of the electrode terminal is positioned in the space surrounded by the flanging, and the sealing piece is at least partially clamped between the electrode terminal and the body;
a first insulating member located between the burring and the electrode terminal to separate the burring and the electrode terminal;
The flange comprises a pressing part and a first connecting part, the first connecting part is connected with the body and the pressing part, the pressing part presses the electrode terminal through the first insulating piece, so that the electrode terminal and the body clamp the sealing piece, and projections of the pressing part and the electrode terminal along the thickness direction of the body are at least partially overlapped.
2. The battery cell of claim 1, wherein: the pressing part extends along the circumferential direction of the flanging and forms an annular structure.
3. The battery cell of claim 2, wherein: the electrode terminal comprises a flange part and a first connecting section, the first connecting section penetrates through the second through hole, the flange part is arranged on the peripheral wall of the first connecting section in a surrounding mode, the flange part is located in a space surrounded by the flanging, the first insulating part is located at least partially between the flange part and the pressing part, and the sealing part is located at least partially between the first connecting section and the body.
4. A battery cell according to claim 3, wherein: the electrode terminal further comprises a second connecting section, and one end of the second connecting section is connected with the end part of the first connecting section, which is opposite to the pressing part;
The sealing piece encloses and closes and form the third through-hole, the second linkage segment wears to locate the third through-hole.
5. A battery cell according to claim 3, wherein: the second through hole has a diameter D1, the flange portion has an outer diameter D1, wherein,and/or->
6. The battery cell according to any one of claims 3 to 5, wherein: the aperture of the second through hole is D1, the outer diameter of the flange part is D1, and D1-D1 is more than or equal to 0.8mm; and/or D1-D1 is less than or equal to 3mm.
7. The battery cell according to any one of claims 3 to 5, wherein: the aperture of the second through hole is D1, and the outer diameter of the first connecting section is D2, wherein D1-D2 is more than or equal to 0.5mm, and/or D1-D2 is less than or equal to 2.5mm.
8. The battery cell according to any one of claims 3 to 5, wherein: the first connecting part is arranged around the first insulating part in a surrounding manner and is provided with a fourth through hole, the aperture of the fourth through hole is D2, the outer diameter of the flange part is D1, wherein D2-D1 is more than or equal to 0.5mm, and/or D2-D1 is less than or equal to 2.5mm.
9. The battery cell according to any one of claims 3 to 5, wherein: the first insulating piece comprises a first insulating part and a second insulating part which are connected, and the first insulating part is coated on the flange part; the second insulating part is positioned between the inner wall of the second through hole and the outer peripheral wall of the first connecting section, and the abutting part abuts against the surface of the first insulating part, which is opposite to the body.
10. The battery cell of claim 9, wherein: the second insulating part protrudes out of the surface of the pressing part, which is opposite to the body; or, the surface of the second insulation part facing away from the body is flush with the surface of the pressing part facing away from the body.
11. The battery cell according to any one of claims 1 to 5, wherein: the pressing portion at least partially overlaps with a projection of the seal member in a thickness direction of the body.
12. The battery cell according to any one of claims 1 to 5, wherein: the pressing portion is formed by bending a part of the flange toward the axis of the first through hole.
13. The battery cell according to any one of claims 1 to 5, wherein: the Brinell hardness of the pressing portion ranges from 10HBW to 100HBW.
14. The battery cell according to any one of claims 1 to 5, wherein: the material of the pressing part comprises aluminum alloy.
15. The battery cell according to any one of claims 1 to 5, wherein: the thickness of the first connecting part is larger than or equal to 0.8mm; and/or, the thickness of the first connecting part is less than or equal to 1.5mm.
16. The battery cell according to any one of claims 1 to 5, wherein: the thickness of the pressing part is larger than or equal to 0.8mm; and/or, the thickness of the pressing part is less than or equal to 1.5mm.
17. The battery cell according to any one of claims 1 to 5, wherein: the flanging also comprises a second connecting part, the second connecting part is connected with the first connecting part and the pressing part, and the surface of the second connecting part, which is opposite to the electrode terminal, is provided with a chamfer angle surface.
18. The battery cell of claim 17, wherein: the included angle between the chamfer angle surface and the axis of the flanging is 30-60 degrees.
19. The battery cell of claim 17, wherein: the ratio of the dimension of the chamfer surface in the thickness direction of the first connecting part to the thickness of the first connecting part is more than or equal to 0.3; and/or the ratio of the dimension of the chamfer surface in the thickness direction of the connecting part to the thickness of the connecting part is less than or equal to 0.6.
20. The battery cell of claim 17, wherein: the ratio of the dimension of the chamfer surface in the thickness direction of the pressing part to the thickness of the pressing part is more than or equal to 0.3; and/or the ratio of the dimension of the chamfer surface in the thickness direction of the pressing part to the thickness of the pressing part is less than or equal to 0.6.
21. The battery cell according to any one of claims 1 to 5, wherein: the flanging further comprises a third connecting part, and the third connecting part is connected between the body and the first connecting part; the surface of the third connecting part facing away from the electrode terminal is configured with a rounded corner surface.
22. The battery cell of claim 21, wherein: the radius of the chamfer angle surface is larger than or equal to 0.4mm.
23. The battery cell according to any one of claims 1 to 5, wherein: the surface of the body, which is opposite to the flanging, is provided with an auxiliary groove, and the auxiliary groove is opposite to the flanging and is used for assisting in manufacturing the flanging.
24. The battery cell of claim 23, wherein: the groove depth of the auxiliary groove is H1, the height difference between the pressing part and the body is H2, wherein,
25. the battery cell according to any one of claims 1 to 5, wherein: the shell comprises a shell body and an end cover, wherein the end cover covers the opening of the shell body; the end cap or the wall of the housing forms a wall of the housing.
26. A battery, characterized in that: comprising a battery cell according to any one of claims 1 to 25.
27. An electrical device, characterized in that: comprising the battery of claim 26.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320544787.2U CN219959211U (en) | 2023-03-20 | 2023-03-20 | Battery monomer, battery and power consumption device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320544787.2U CN219959211U (en) | 2023-03-20 | 2023-03-20 | Battery monomer, battery and power consumption device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219959211U true CN219959211U (en) | 2023-11-03 |
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ID=88542559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320544787.2U Active CN219959211U (en) | 2023-03-20 | 2023-03-20 | Battery monomer, battery and power consumption device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219959211U (en) |
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2023
- 2023-03-20 CN CN202320544787.2U patent/CN219959211U/en active Active
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