CN211907569U - Single battery, battery module and energy storage device - Google Patents
Single battery, battery module and energy storage device Download PDFInfo
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- CN211907569U CN211907569U CN202020435468.4U CN202020435468U CN211907569U CN 211907569 U CN211907569 U CN 211907569U CN 202020435468 U CN202020435468 U CN 202020435468U CN 211907569 U CN211907569 U CN 211907569U
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- battery cell
- battery
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- shell
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- 238000004146 energy storage Methods 0.000 title claims description 8
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 239000004033 plastic Substances 0.000 claims abstract description 28
- 229920003023 plastic Polymers 0.000 claims abstract description 28
- 239000003792 electrolyte Substances 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims description 19
- 238000004382 potting Methods 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 abstract description 6
- 239000003292 glue Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000565 sealant Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The utility model discloses a battery cell and battery module relates to the battery field. The single battery comprises a shell, a battery core and a sealing element. The shell is a structure with at least two open ends; the battery cell is arranged in the shell, a first end and a second end of the battery cell, which extend along the axial direction of the battery cell, are respectively provided with a positive full lug and a negative full lug, and notches are respectively punched at two symmetrical ends along the axial direction of the battery cell after the positive full lug and the negative full lug are welded in an overlaying manner so as to form a positive pole column and a negative pole column with set shapes; the sealing element is inserted into the opening end of the shell and is in interference fit with the opening end so as to seal the opening end, and a liquid injection hole is arranged on the sealing element and corresponds to the notch so as to inject electrolyte into the battery cell; the sealing member includes rubber support piece and plastic support piece, and plastic support piece sets up on rubber support piece, and is connected with rubber support piece interference fit. The single battery has good electrolyte wettability and simple packaging.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery cell, battery module and energy memory.
Background
Along with the continuous development of science and technology, the application of lithium cell is more and more extensive, and the full utmost point ear structure ubiquitous of lithium ion battery exists in soft package and aluminum hull battery at present, but in full utmost point ear welding process, the extension stitch welding of positive negative pole mass flow body is as an organic whole, receives welding pressure and welding area's influence, and inside the electrolyte can't enter into electric core fast, battery stationary time extension, serious influence the performance of battery even.
In the prior art, a gap is cut along the thickness direction of an extending part of a positive current collector and a negative current collector, the thickness of the gap is half of that of the positive current collector and the negative current collector, electrolyte is injected into one side of the gap, and then the top cover and the aluminum shell are packaged through laser welding. But this packaging method is complicated and inefficient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a single battery, its simple structure need not the welding encapsulation, and the encapsulation is convenient, and annotates the liquid fast.
To achieve the purpose, the utility model adopts the following technical proposal:
a cell, comprising:
the shell is of a structure with at least two open ends;
the battery cell is arranged in the shell, a first end and a second end of the battery cell, which extend along the axis direction of the battery cell, are respectively provided with a positive full tab and a negative full tab, and notches are respectively punched at two symmetrical ends along the axis of the battery cell after the positive full tab and the negative full tab are stitch-welded so as to form a positive pole column and a negative pole column with set shapes;
the sealing element is inserted into the opening end of the shell and is in interference fit with the opening end so as to block the opening end, a liquid injection hole and a pole column hole are formed in the sealing element, and the liquid injection hole is arranged corresponding to the notch and used for injecting electrolyte into the electric core;
the sealing member includes rubber support piece and plastic support piece, plastic support piece set up in on the rubber support piece, and with rubber support piece interference fit connects.
Optionally, the stitch welding end of the positive full tab is spaced from the end surface of the first end by a first distance; and/or the presence of a gas in the gas,
and the stitch welding end part of the negative pole full lug and the end surface of the second end are separated by a second distance.
Optionally, a groove is formed in the rubber support, a projection is formed in the plastic support, and the groove is connected with the projection in an interference fit manner.
Optionally, a pouring sealant is arranged on the sealing element, and the pouring sealant covers the sealing element to form a pouring cover.
Optionally, a spacing distance is provided between the potting surface and the housing end surface.
Optionally, a liquid injection pipe is arranged in the liquid injection hole and extends out of the cover.
Optionally, the positive post and the negative post are square, polygonal, or cylindrical.
Optionally, at least one liquid injection hole is arranged on each sealing element.
Another object of the utility model is to provide a battery module to realize convenient and fast in groups.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery module comprises the single battery.
Still another object of the present invention is to provide an energy storage device to achieve simple structure and low cost.
To achieve the purpose, the utility model adopts the following technical proposal:
an energy storage device comprises the battery module.
The utility model has the advantages that:
the utility model provides a single battery, which is characterized in that notches are respectively punched at two symmetrical ends of the axis of a battery cell by a positive pole full tab and a negative pole full tab formed by stitch welding to form a positive pole column and a negative pole column with set shapes; then set up the sealing member at the both ends of casing, correspond the position of breach on the sealing member and set up and annotate the liquid hole, the electrolyte is through annotating the liquid hole injection, then evenly immerse electric core through the breach position for the infiltration nature of electrolyte is better. In addition, the positive pole column and the negative pole column of the single battery are respectively led out from two ends of the shell, when the single batteries are grouped, the single batteries can be connected in series end to end without being electrically connected through a connecting sheet, so that not only is the material saved, but also the occupied space of the battery module is greatly saved; the liquid is injected through the liquid injection holes at the two ends of the shell simultaneously, so that the liquid injection efficiency is improved; the sealing element is inserted into the opening end of the shell to realize packaging, and the structure is simple and easy to operate.
The utility model provides a single battery, sealing member include rubber support piece and the plastic support piece who is connected rather than interference fit, fill the casting glue on plastic support piece, change in the shaping, and the embedment face and the housing end face interval certain distance of casting glue, treat the casting glue solidification back, carry out the plastic to the housing end face and the interval department of the cover of pouring, mould plastics after the plastic. The single battery is sealed simply and threefully, and the sealing reliability is greatly improved.
The utility model provides a battery module uses foretell battery cell, and positive negative pole post is drawn forth respectively from the both ends of casing, convenient and fast in groups, and space utilization is high. Electrolyte is injected into the electrolyte injection hole on the sealing element, and the electrolyte flows into the battery cell through the notch, so that the wettability is better, and the performance of the battery module is improved.
The utility model provides an energy storage device uses foretell battery module, simple structure, with low costs.
Drawings
Fig. 1 is a schematic structural diagram of a casing and a full tab electric core of a single battery provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single battery cell after full tab overlap welding according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a pole formed by cutting after full tab stitch welding of a single battery provided by an embodiment of the present invention;
fig. 4 is a schematic view illustrating a process of installing a sealing member of a single battery according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a single battery provided in an embodiment of the present invention;
fig. 6 is a sectional view taken along the line a-a of fig. 5.
In the figure:
1. a housing; 2. an electric core; 21. a positive electrode full lug; 22. a negative electrode full tab; 31. a positive post; 32. a negative pole post; 33. a notch; 41. a rubber support; 42. a plastic support; 5. a liquid injection pipe; 6. a liquid injection hole; 7. a cover is poured; 8. a pole bore.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 6, the present embodiment provides a single battery including a case 1, a cell 2, and a sealing member. The shell 1 is a structure with at least two open ends; the battery cell 2 is arranged in the shell 1, a first end and a second end of the battery cell 2 extending along the axial direction of the battery cell 2 are respectively provided with a positive full tab 21 and a negative full tab 22, and notches 33 are punched at two symmetrical ends along the axial direction of the battery cell 2 after the positive full tab 21 and the negative full tab 22 are welded in an overlaying manner so as to form a positive pole column 31 and a negative pole column 32 with set shapes; the sealing member is inserted in the open end of the casing 1 and is in interference fit with the open end to block the open end, the sealing member is provided with a liquid injection hole 6, and the liquid injection hole 6 is arranged corresponding to the notch 33 and is used for injecting electrolyte into the battery cell 2. The sealing member includes a rubber supporting member 41 and a plastic supporting member 42, and the plastic supporting member 42 is disposed on the rubber supporting member 41 and connected to the rubber supporting member 41 in an interference fit manner.
In the single battery provided in this embodiment, notches 33 are punched at two symmetrical ends of the positive full tab 21 and the negative full tab 22 formed by stitch welding along the axis of the battery cell 2, respectively, so as to form a positive post 31 and a negative post 32 with set shapes; then, sealing elements are arranged at two ends of the shell 1, and liquid injection holes 6 are arranged on the sealing elements at positions corresponding to the notches 33; electrolyte is injected through the injection hole 6 and then evenly soaked into the battery cell 2 through the position of the gap 33, so that the electrolyte has better wettability. In addition, the positive pole column 31 and the negative pole column 32 of the single battery are respectively led out from two ends of the shell 1, when the single batteries are grouped, the single batteries can be connected in series end to end without being electrically connected through a connecting sheet, so that not only is the material saved, but also the occupied space of a battery module is greatly saved; the liquid is injected simultaneously through the liquid injection holes 6 at the two ends of the shell 1, so that the liquid injection efficiency is improved; the sealing element is inserted into the opening end of the shell 1 to realize encapsulation, and the structure is simple and easy to operate.
In the present embodiment, the sealing member is further provided with a post hole 8, and the positive post 31 and the negative post 32 protrude out of the housing 1 through the post hole 8.
In this embodiment, electric core 2 is coiling type, it includes the positive plate, the negative plate and the diaphragm of keeping apart positive plate and negative plate, the positive plate includes the anodal mass flow body and the anodal material of coating on the anodal mass flow body, the negative plate includes the negative pole mass flow body and the negative material of coating on the negative pole mass flow body, the anodal mass flow body has the anodal full utmost point ear 21 that extends to the first end outside of electric core 2 along the axis direction of electric core 2, anodal full utmost point ear 21 is as an organic whole along first direction stitch welding, the axis direction of first direction perpendicular to electric core 2, the negative pole mass flow body has the negative pole full utmost point ear 22 that extends to the second end outside of electric core 2 along the axis direction of electric core 2, the negative pole full utmost point ear 22 is as an. The positive full-pole tab 21 punches notches 33 along the two winding and bending positions at the first end respectively, and the part left in the middle is the positive pole column 31 for conducting current; the negative electrode full tab 22 punches notches 33 along the two winding and bending positions of the second end respectively, and the part left in the middle is the negative electrode pole 32 for conducting current; the gaps 33 at the two ends just remove the welding area of the positive electrode full tab 21 and the negative electrode full tab 22, and the electrolyte directly flows into the gap between the pole pieces of the battery cell 2 through the electrolyte injection hole 6 arranged on the sealing element corresponding to the position of the gap 33, so that the infiltration effect is good, and the efficiency is high.
In another optional embodiment of the present invention, the battery cell 2 may also be of a laminated type, and the positive full tab 21 and the negative full tab 22 respectively stamp the notch 33 along two ends of the battery cell 2 axis symmetry to form the positive post 31 and the negative post 32 with a set shape.
In this embodiment, if the thickness of the full positive electrode tab 21 and the full negative electrode tab 22 after the overlap welding cannot reach the set thickness of the electrode posts, auxiliary welding pieces may be added at two ends of the full positive electrode tab 21 and the full negative electrode tab 22 to reach the positive electrode posts 31 and the negative electrode posts 32 with the required thickness.
Alternatively, the positive and negative posts 31 and 32 may be square, polygonal, or cylindrical. In this embodiment, the positive electrode full tab 21 and the negative electrode full tab 22 are cut by punching the notch 33 to form the square positive electrode post 31 and the square negative electrode post 32, and the square positive electrode post 31 and the square negative electrode post 32 are easy to form, simple to manufacture and high in efficiency. In other embodiments, the cutting can be performed in a polygonal shape or a circular shape according to actual conditions.
Optionally, at least one pour hole 6 is provided in each seal. In this embodiment, a liquid injection hole 6 is formed in the sealing member, the liquid injection hole 6 is disposed corresponding to one of the notches 33 at two ends of the battery cell 2, and the electrolyte flows into the battery cell 2 through the notch 33. Of course, in other embodiments, the pour hole 6 may be provided at a position corresponding to each notch 33.
Optionally, the stitch-welded end of the positive full tab 21 is spaced from the end surface of the first end by a first distance; and/or the stitch-welded end of the negative full tab 22 is spaced a second distance from the end face of the second end. The purpose of setting up first distance and second distance is in order to reduce the operation degree of difficulty when anodal full utmost point ear 21 and the full utmost point ear 22 of negative pole weld into platelike, avoids damaging anodal material and the negative pole material on electric core 2, influences battery cell's performance. In other embodiments, the space may be provided only between the stitch-welded end portion of the positive electrode full tab 21 and the end surface of the first end, or only between the stitch-welded end portion of the negative electrode full tab 22 and the end surface of the second end. In this embodiment, the first distance and the second distance are not specifically limited, and may be set according to actual situations.
Alternatively, as shown in fig. 6, a groove is provided on the rubber support 41, a protrusion is provided on the plastic support 42, and the groove and the protrusion are connected in an interference fit manner. Specifically, a potting adhesive is disposed on the sealing member, and the potting adhesive covers the sealing member to form a potting cover 7. In this embodiment, the rubber supporting member 41 has a certain elasticity and is made of polymer rubber, after the battery cell 2 is pre-sealed by the rubber supporting member 41, the plastic supporting member 42 is disposed on the rubber supporting member 41 and connected with the rubber supporting member in an interference fit manner, and then the potting adhesive is disposed on the plastic supporting member 42 to further perform secondary sealing on the battery cell 2. It is easy to understand that the hardness of the plastic support 42 is greater than that of the rubber support 41, and the rubber support 41 is used for pre-sealing, so that the adjustment is easy; and a supporting surface with certain hardness is needed during glue filling, so that the forming of the filling surface 7 is facilitated.
Optionally, a liquid injection pipe 5 is arranged in the liquid injection hole 6, and the liquid injection pipe 5 extends out of the cover 7. In this embodiment, be provided with the utmost point post hole 8 that corresponds the utmost point post on the sealing member and correspond notes liquid hole 6 of breach 33 position for utmost point post can stretch out irritate front cover 7, is provided with in annotating the liquid hole 6 and annotates liquid pipe 5, annotates liquid pipe 5 and can stretch out irritate front cover 7, the pouring into of the electrolyte of being convenient for.
Optionally, a spacing distance is provided between the potting surface 7 and the end surface of the housing 1. In the present embodiment, a space is provided between the potting surface 7 and the end surface of the housing 1 to prepare for the subsequent injection molding. After the pouring sealant is cured and molded, the reserved intervals at the two ends of the shell 1 are shaped, so that the protection strength of injection molding is improved; and (3) performing injection molding and packaging on two ends of the shaped shell 1 so as to further improve the packaging reliability of the single battery. Preferably, the spacing distance is 2-5 mm. Of course in other embodiments the spacing distance may be set according to the specific dimensions of the housing 1.
The single battery that this embodiment provided includes rubber support piece 41 and rather than the plastic support piece 42 that interference fit is connected through the sealing member, fills the casting glue on plastic support piece 42, and the embedment face 7 and the 1 terminal surface interval certain distance of casing of casting glue wait that the casting glue solidification is formed after, carry out the plastic to the interval department of 1 terminal surface of casing and embedment face 7, mould plastics after the plastic. The single battery is sealed simply and threefully, and the sealing reliability is greatly improved.
The preparation process of the single battery provided in this embodiment is as follows:
(1) and winding the battery cell 2, and respectively leading out a positive full-tab 21 and a negative full-tab 22 from the first end and the second end of the battery cell 2 in the process of winding the battery cell 2.
(2) Stitch-welding the positive full tab 21 into a plate shape along the first direction at a position which is 10mm away from the end surface of the first end of the battery cell 2; and stitch-welding the negative pole full tab 22 into a plate shape along the first direction at a position which is about 10mm away from the end surface of the second end of the battery cell 2.
(3) Punching notches 33 corresponding to the two winding bending positions, wherein the notch 33 of the positive full tab 21 extends outwards from the end surface of the first end of the battery cell 2, and the notch 33 of the negative full tab 22 extends outwards from the end surface of the second end of the battery cell 2; after the notch 33 is punched, the square positive pole 31 and negative pole 32 are formed.
(4) The battery core 2 is placed in the casing 1, rubber support members 41 are sleeved on two ends of the casing 1, the positive pole post 31 and the negative pole post 32 penetrate through the pole post hole 8 and extend out of the casing 1, and the rubber support members 41 are pressed into the casing 1 for pre-sealing.
(5) Installing the plastic support member 42, filling the pouring sealant above the plastic support member 42, covering the whole plastic support member 42 with the filling surface 7, only exposing the liquid injection pipe 5 and the pole column, and reserving 2-5 mm between the filling surface 7 and the end face of the shell 1.
(6) And heating the encapsulating surface 7, and curing and molding.
(7) And shaping the reserved part of the shell 1 after curing and forming.
(8) And (5) performing injection molding and sealing on the shaped shell 1, and finishing the battery packaging.
(9) Electrolyte is injected through the injection tube 5, and then the injection hole 6 is sealed.
The embodiment also provides a battery module, which comprises the single battery. The battery module applies the single battery, the positive pole column 31 and the negative pole column 32 are respectively led out from two ends of the shell 1, grouping is convenient and fast, and space utilization rate is high. Electrolyte is injected into the electrolyte injection hole 6 on the sealing element, and the electrolyte flows into the battery cell 2 through the notch 33, so that the wettability is better, and the performance of the battery module is improved.
The embodiment also provides an energy storage device, which comprises the battery module. The energy storage device is simple in structure and low in cost.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. A battery cell, comprising:
the shell (1), the said shell (1) is the structure of opening at least both ends;
the battery cell (2) is arranged in the shell (1), a positive full-lug (21) and a negative full-lug (22) are respectively arranged at a first end and a second end of the battery cell (2) extending along the axis direction of the battery cell, and notches (33) are respectively punched at two symmetrical ends along the axis of the battery cell (2) after the positive full-lug (21) and the negative full-lug (22) are welded in an overlapping mode so as to form a positive pole column (31) and a negative pole column (32) with set shapes;
the sealing element is inserted into the opening end of the shell (1) and is in interference fit with the opening end so as to seal the opening end, a liquid injection hole (6) is formed in the sealing element, and the liquid injection hole (6) is arranged corresponding to the notch (33) and used for injecting electrolyte into the battery cell (2);
the sealing member includes rubber support piece (41) and plastic support piece (42), plastic support piece (42) set up in on rubber support piece (41), and with rubber support piece (41) interference fit is connected.
2. The cell according to claim 1, wherein the stitch-welded end of the positive full tab (21) is spaced a first distance from the end face of the first end; and/or the presence of a gas in the gas,
the stitch welding end part of the negative pole full tab (22) is separated from the end surface of the second end by a second distance.
3. The battery cell according to claim 1, wherein a groove is formed on the rubber support (41), and a protrusion is formed on the plastic support (42), and the groove is connected with the protrusion in an interference fit manner.
4. The single battery according to claim 3, characterized in that a potting adhesive is arranged on the sealing element, and the potting adhesive covers the sealing element to form a potting cover (7).
5. The cell according to claim 4, characterised in that a spacing distance is provided between the potting cover (7) and the end face of the housing (1).
6. The battery cell according to claim 4, characterized in that a liquid injection pipe (5) is arranged in the liquid injection hole (6), and the liquid injection pipe (5) extends out of the cover (7).
7. The battery cell according to claim 1, wherein the positive post (31) and the negative post (32) are square, polygonal, or cylindrical.
8. The battery cell according to claim 1, characterized in that at least one liquid injection hole (6) is provided on each of the sealing members.
9. A battery module comprising the unit battery according to any one of claims 1 to 8.
10. An energy storage device characterized by comprising the battery module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020435468.4U CN211907569U (en) | 2020-03-30 | 2020-03-30 | Single battery, battery module and energy storage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020435468.4U CN211907569U (en) | 2020-03-30 | 2020-03-30 | Single battery, battery module and energy storage device |
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| CN211907569U true CN211907569U (en) | 2020-11-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510326A (en) * | 2020-12-18 | 2021-03-16 | 湖北亿纬动力有限公司 | Single battery |
| CN112886152A (en) * | 2021-01-12 | 2021-06-01 | 宁德新能源科技有限公司 | Battery cell, battery and electronic equipment |
| CN113381119A (en) * | 2021-06-10 | 2021-09-10 | 湖北亿纬动力有限公司 | Battery manufacturing method and battery |
| CN116706361A (en) * | 2023-08-03 | 2023-09-05 | 深圳毅信新能源科技有限公司 | Cylindrical battery and preparation method thereof |
-
2020
- 2020-03-30 CN CN202020435468.4U patent/CN211907569U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510326A (en) * | 2020-12-18 | 2021-03-16 | 湖北亿纬动力有限公司 | Single battery |
| CN112886152A (en) * | 2021-01-12 | 2021-06-01 | 宁德新能源科技有限公司 | Battery cell, battery and electronic equipment |
| CN113381119A (en) * | 2021-06-10 | 2021-09-10 | 湖北亿纬动力有限公司 | Battery manufacturing method and battery |
| CN113381119B (en) * | 2021-06-10 | 2022-08-12 | 湖北亿纬动力有限公司 | Battery manufacturing method and battery |
| CN116706361A (en) * | 2023-08-03 | 2023-09-05 | 深圳毅信新能源科技有限公司 | Cylindrical battery and preparation method thereof |
| CN116706361B (en) * | 2023-08-03 | 2023-12-19 | 深圳毅信新能源科技有限公司 | Cylindrical battery and preparation method thereof |
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