CN218788431U - Secondary battery and power utilization device - Google Patents
Secondary battery and power utilization device Download PDFInfo
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- CN218788431U CN218788431U CN202223218648.5U CN202223218648U CN218788431U CN 218788431 U CN218788431 U CN 218788431U CN 202223218648 U CN202223218648 U CN 202223218648U CN 218788431 U CN218788431 U CN 218788431U
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- 230000000903 blocking effect Effects 0.000 claims abstract description 45
- 125000006850 spacer group Chemical group 0.000 claims abstract description 16
- 230000004888 barrier function Effects 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims description 18
- 239000004033 plastic Substances 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000001788 irregular Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
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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
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- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses secondary battery and electric device of this application, secondary battery includes: the top cover is provided with a first through hole; the spacer ring comprises a blocking part, an extending part and a connecting part, the blocking part is connected with the extending part, and the connecting part is connected with the extending part; the barrier part is provided with a second through hole, and the extension part is arranged around the first through hole so as to enable the second through hole to correspond to the first through hole; the pole is positioned in the second through hole, and the connecting part is connected with the top cover so as to enclose the blocking part, the extending part, the top cover and the pole to form a cavity; and the insulating piece is arranged around the space ring and fills at least part of the cavity so as to connect the pole to the top cover in a matched manner. The space ring can improve the bonding strength with the pole and improve the matching precision of the space ring and the top cover; through set up the part that blocks on the space ring, can play the effect of blockking to the insulating part, can effectively avoid the insulating part to drop the not hard up or short circuit problem of utmost point post that causes because of ageing from the top cap after long-term the use.
Description
Technical Field
The application belongs to the technical field of batteries, and particularly relates to a secondary battery and an electric device.
Background
The space ring is positioned between the battery top cover and the pole terminal, and is used for isolating the battery top cover from the pole terminal and preventing the battery top cover from contacting with the pole terminal to cause short circuit of the battery. Because the assembly precision of the existing space ring is poor, and the space ring is easy to fall off after the battery is used for a long time, the pole is loosened or short-circuited, and the performance of the battery is seriously influenced.
Disclosure of Invention
The invention aims to: the application provides a secondary battery, which aims to solve the problems of poor assembling precision and easy falling of a space ring; another object of the present application is to provide an electric device including the secondary battery.
Technical solution, a secondary battery of the present application includes:
the top cover is provided with a first through hole;
the spacer ring comprises a blocking part, an extending part and a connecting part, the blocking part is connected with the extending part, the connecting part is connected with the extending part, and the connecting part is positioned on one side of the extending part far away from the blocking part; the barrier part is provided with a second through hole, and the extension part is arranged around the first through hole so as to enable the second through hole to correspond to the first through hole;
the pole is positioned in the second through hole, and the connecting part is connected with the top cover so as to enclose the blocking part, the extending part, the top cover and the pole to form a cavity;
and the insulating piece is arranged around the space ring and fills at least part of the cavity so as to connect the pole to the top cover in a matched manner.
In some embodiments, the pole has a first circumferential surface and a second circumferential surface arranged along the circumferential direction, the first circumferential surface is connected with the second circumferential surface; a first gap is formed between the barrier portion and the first peripheral surface, a second gap is formed between the extension portion and the second peripheral surface, and the insulator fills at least part of the first gap and at least part of the second gap.
In some embodiments, the firstA gap having a first dimension D along a first direction 1 The second gap has a second dimension D along the first direction 2 First dimension D 1 And a second dimension D 2 Satisfies the following conditions: d is more than or equal to 0.1 1 /D 2 Less than or equal to 0.9; wherein D is not less than 0.2mm 1 ≤2mm，0.5mm≤D 2 ≤5mm。
In some embodiments, 0.2 ≦ D 1 /D 2 Less than or equal to 0.8; wherein D is more than or equal to 0.4mm 1 ≤1mm，0.5mm≤D 2 ≤2mm。
In some embodiments, the extension portion has a first surface and a second surface facing away from each other along the first direction, a third through hole penetrating through the first surface and the second surface is provided on the extension portion, and the insulating member is disposed through the third through hole and fills at least a portion of the second gap and at least a portion of the first gap.
In some embodiments, the third through-hole has an area S on the first surface 1 The area of the first surface is S,0<S 1 S is less than or equal to 0.8; alternatively, the first and second electrodes may be,
the third through hole has an area S on the first surface 1 The area of the first surface is S, S is more than or equal to 0.001 1 /S≤0.5。
In some embodiments, the blocking portion has a third surface and a fourth surface facing away from each other along the second direction, and a groove penetrating through the third surface and the fourth surface is formed on the blocking portion; the insulating part penetrates through the groove and fills at least part of the second gap and at least part of the first gap.
In some embodiments, the blocking portion has a third surface and a fourth surface facing away from each other along the second direction, a fourth through hole penetrating through the third surface and the fourth surface is provided on the blocking portion, and the insulating member is disposed through the fourth through hole and fills at least a portion of the second gap and at least a portion of the first gap.
In some embodiments, the third and fourth vias Kong Manzu:
1mm 2 ≤S 1 ≤30mm 2 (ii) a And/or the presence of a gas in the gas,
0.1mm 2 ≤S 2 ≤20mm 2 ；
S 1 is shown asArea of three through holes on the first surface, S 2 Showing the area of the fourth through-hole on the third surface.
In some embodiments, the third and fourth vias Kong Manzu: 4mm 2 ≤S 1 ≤15mm 2 And 0.78mm 2 ≤S 2 ≤12mm 2 。
In some embodiments, the cage further satisfies:
the third surface and/or the fourth surface are parallel to the top cover; alternatively, the first and second electrodes may be,
the distance between the third surface and the fourth surface is 0.4-1.5 mm; alternatively, the first and second electrodes may be,
the distance between the first surface and the second surface is 0.4-1.5 mm.
In some embodiments, the blocking portion and the extension portion are a unitary or split structure; and/or the presence of a gas in the gas,
the extension part and the connecting part are of an integrated structure or a split structure.
In some embodiments, the barrier and the extension are in circular arc transition connection; and/or the presence of a gas in the gas,
the extension part and the connecting part are in arc transition connection.
In some embodiments, further comprising:
the sealing ring is positioned between the pole column and the top cover and is respectively abutted against the pole column and the top cover so as to seal the cavity;
the lower plastic is connected with the top cover and is positioned on one side of the top cover away from the space ring;
the casing, the casing is including holding the chamber, and the top cap is connected and the lid closes and holds the chamber with the casing.
In some embodiments, the present application also provides an electric device including the secondary battery.
Has the advantages that: compared with the prior art, the secondary battery of the application comprises: the top cover is provided with a first through hole; the spacer ring comprises a blocking part, an extending part and a connecting part, the blocking part is connected with the extending part, the connecting part is connected with the extending part, and the connecting part is positioned on one side of the extending part far away from the blocking part; the barrier part is provided with a second through hole, and the extension part is arranged around the first through hole so as to enable the second through hole to correspond to the first through hole; the pole is positioned in the second through hole, and the connecting part is connected with the top cover so as to enclose the blocking part, the extending part, the top cover and the pole to form a cavity; and the insulating piece is arranged around the space ring and fills at least part of the cavity so as to connect the pole to the top cover in a matched manner. The space ring can improve the bonding strength with the pole, improve the matching precision of the space ring and the top cover and improve the assembly yield of the pole; simultaneously through set up the part that blocks on the space ring, can play the effect of blockking to the insulating part of moulding plastics, can effectively avoid the insulating part to use the back for a long time because of ageing not hard up or the short circuit problem of utmost point post that drops and cause from the top cap.
It can be understood that, compared with the prior art, the electric device provided in the embodiments of the present application has all the technical features and advantages of the secondary battery described above, and will not be described herein again.
Drawings
The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural diagram of a secondary battery provided in an embodiment of the present application;
fig. 2 is an exploded schematic view of a secondary battery according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a cap assembly provided in accordance with an embodiment of the present application;
FIG. 4 is an enlarged schematic view at A in FIG. 3;
FIG. 5 is an enlarged schematic view at B in FIG. 4;
FIG. 6 is a schematic view of a spacer structure according to an embodiment of the present disclosure;
FIG. 7 is a schematic view of another spacer structure provided in an embodiment of the present application;
FIG. 8 is a schematic cross-sectional view taken along direction E-E of FIG. 7;
FIG. 9 is a schematic view of another spacer structure provided in an embodiment of the present application;
FIG. 10 is a schematic cross-sectional view taken along the line F-F in FIG. 7;
FIG. 11 is a schematic view of another spacer structure provided in the embodiments of the present application;
FIG. 12 is a schematic cross-sectional view of the cage of FIG. 11;
FIG. 13 is a schematic diagram of a top cover structure provided in an embodiment of the present application;
reference numeral, 1-top cover, 2-spacer, 3-pole, 4-insulator, 5-cavity, 6-sealing ring, 7-lower plastic, 8-shell, 11-first through hole, 21-blocking part, 22-extending part, 23-connecting part, 31-first peripheral surface, 32-second peripheral surface, 51-first gap, 52-second gap, 211-second through hole, 81-containing cavity, 212-third surface, 213-fourth surface, 214-fourth through hole, 221-first surface, 222-second surface, 223-third through hole, 224-groove.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application.
Referring to fig. 1 and 2, there is provided a secondary battery including a top cap 1, a space ring 2, a post 3, and an insulator 4; the top cover 1 is provided with a first through hole 11, the space ring 2 comprises a blocking part 21, an extending part 22 and a connecting part 23, the blocking part 21 is connected with the extending part 22, the connecting part 23 is connected with the extending part 22, and the connecting part 23 is positioned on one side of the extending part 22 far away from the blocking part 21; the blocking part 21 is provided with a second through hole 211, and the extension part 22 is arranged around the first through hole 11 to correspond the second through hole 211 to the first through hole 11; the pole 3 is positioned in the second through hole 211, and the connecting part 23 is connected with the top cover 1 so as to enclose the blocking part 21, the extending part 22, the top cover 1 and the pole 3 to form a cavity 5; an insulator 4 is disposed around the spacer 2 and fills at least a portion of the cavity 5 to fittingly attach the post 3 to the cap 1. In some embodiments, the insulating member 4 partially fills the cavity 5, thereby saving the cost of the secondary battery while ensuring insulation and sealing. In other embodiments, the insulating member 4 completely fills the cavity 5 to improve the sealability and insulation of the secondary battery.
In some embodiments, the spacer 2 of the present application is of a circular structure as a whole, the blocking portion 21 protrudes relative to the connecting portion 23, and the blocking portion 21 is parallel to the connecting portion 23, so that the blocking portion 21, the extending portion 22, the top cover 1 and the pole 3 can enclose and form the cavity 5, where the blocking portion 21 is parallel to the connecting portion 23, specifically, the lower surface of the blocking portion 21 is parallel to the lower surface of the connecting portion 23, or the upper and lower surfaces of the blocking portion 21 and the upper and lower surfaces of the connecting portion 23 are both parallel, where parallel refers to complete parallel or almost complete parallel, for example, parallel is counted within ± 5 ° of complete parallel; the cavity 5 is used for injection molding of the insulating part 4, the insulating part 4 firstly surrounds the space ring 2 and then can be filled in the cavity 5 through injection molding, so that the pole 3 and the space ring 2 are connected into a whole, and the insulating part 4 is respectively contacted with the pole 3, the top cover 1 and the space ring 2 in the cavity 5, so that the purpose of insulation is realized; then, the connecting part 23 is further connected with the top cover 1, so that the pole 3 is connected with the top cover 1 in a matched manner, and the space ring 2 is positioned between the pole 3 and the top cover 1 and can play an isolation role; the insulating part 4 in the cavity 5 further isolates the pole 3 from the top cover 1 and plays a role in insulation; owing to set up the top that stops portion 21 and stop portion 21 and be located cavity 5, can play the effect of stopping to insulating part 4 in the cavity 5, can effectively avoid insulating part 4 to drop from top cap 1 and cause 3 not hard up or 3 short circuit scheduling problems of utmost point post, be favorable to improving secondary battery's life-span and performance.
In some embodiments, referring to fig. 2, 3 and 4, the secondary battery further includes: a shell 8, a sealing ring 6 and lower plastic 7; the shell 8 comprises an accommodating cavity 81, the top cover 1 is connected with the shell 8 and covers the accommodating cavity 81, the sealing ring 6 is positioned between the pole 3 and the top cover 1, and the sealing ring 6 is respectively abutted against the pole 3 and the top cover 1 so as to seal the cavity 5; the lower plastic 7 is connected with the top cover 1, and the lower plastic 7 is located on one side of the top cover 1 far away from the space ring 2, namely, the lower plastic 7 is close to the accommodating cavity 81.
In some embodiments, referring to fig. 13, the top cover 1 is provided with two first through holes 11, and a mounting hole for mounting the explosion-proof valve and a liquid injection hole for injecting electrolyte are further arranged between the two first through holes 11; a groove for connecting the space ring 2 is arranged around the outside of the first through hole 11, and the bottom of the connecting part 23 of the space ring 2 is in contact with the surface of the groove; the center of the blocking portion 21 is provided with a second through hole 211, the second through hole 211 and the first through hole 11 are circular holes, and the second through hole 211 corresponds to the first through hole 11, which means that the centers of the second through hole 211 and the first through hole 11 are located on the same straight line, so that the terminal 3 can be conveniently connected with the electric core in the housing 8 through the first through hole 11.
In some embodiments, referring to fig. 2, since the top cover 1 is provided with two first through holes 11, the two first through holes 11 correspond to two poles 3 respectively, the two poles 3 are a positive pole and a negative pole respectively, and each pole is connected with the top cover 1 by a space ring 2 in a matching manner; the pole 3 is made of aluminum, copper or composite metal, the space ring 2 is made of metal such as aluminum, and the insulating part 4 is made of thermoplastic polymer material such as PPS material; utmost point post 3 wholly appears cylindricly, and when utmost point post 3 was located second through-hole 211, utmost point post circumference's surface was relative with stop part 21 and extension 22 respectively, and the relative clearance that produces is used for filling insulating part 4 for utmost point post 3 and space ring 2 are through insulating part 4 integrated into one piece for independent utmost point post structure of moulding plastics, in order to reach the purpose of assembly and insulation. The bottom of the spacer ring 2 is closely attached to the top of the top cover 1 and the sealing ring 6, the connecting part 23 and the top cover 1 are subjected to laser welding under the compressed state of the sealing ring 6, the laser welding power is 1000-6000W, the welding track is circular, the welding depth is 0.4-0.8 mm, and the welding width is 0.5-2 mm; lower plastic 7 is glued or super-welded with the lower surface of top cap 1 and is connected to constitute the top cap subassembly jointly with top cap 1, spacer ring 2, utmost point post 3, insulating part 4, sealing washer 6. The connection portion 23 and the top cover 1 are not limited to laser welding, and other connection methods such as resistance welding may be used.
In some embodiments, with reference to fig. 4 and 5, the pole 3 has a first peripheral surface 31 and a second peripheral surface 32 arranged along the circumferential direction, the first peripheral surface 31 being connected with the second peripheral surface 32; a first gap 51 is formed between the barrier portion 21 and the first peripheral surface 31, a second gap 52 is formed between the extension portion 22 and the second peripheral surface 32, and the insulating member 4 is filled into the second gap 52 through the first gap 51, wherein the diameter of the circumference corresponding to the first peripheral surface 31 and the diameter of the circumference corresponding to the second peripheral surface 32 may be equal to or different from each other, and the specific diameter is based on the actual pole structure; with further reference to fig. 5, the first gap 51 has a first dimension D in the first direction 1 The second gap 52 has a second dimension D along the first direction 2 First dimension D 1 And a second dimension D 2 Satisfies the following conditions: d is more than or equal to 0.1 1 /D 2 ≤0.9。
When first clearance 51 and second clearance 52 satisfy foretell relation, can guarantee that space ring 2 has good cooperation size when moulding plastics or being connected with top cap 1, increase space ring 2 and utmost point post 3's bonding strength, improve space ring 2 and top cap 1's cooperation precision to improve utmost point post 3's assembly yield simultaneously, avoided because the bad problem of assembly that leads to of cooperation size.
In some embodiments, D 1 /D 2 The value of (a) may be any of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or a range between any two values. Further, 0.2. Ltoreq. D 1 /D 2 ≤0.8。
Wherein D is more than or equal to 0.2mm 1 ≤2mm，0.5mm≤D 2 Less than or equal to 5mm. In some embodiments, the first dimension D 1 And a second dimension D 2 Further preferred ranges are: d is not less than 0.4mm 1 ≤1mm，0.5mm≤D 2 ≤2mm。
In some embodiments, the first direction is the direction indicated by the arrow in fig. 5, and the first direction may be a direction parallel to the surface of the cap 1, where parallel is completely parallel or nearly completely parallel, e.g., parallel within ± 5 ° of completely parallel.
In some embodiments, in order to further increase the filling degree of the insulating member 4 in the cavity 5, referring to fig. 5, the extension portion 22 has a first surface 221 and a second surface 222 facing away from each other along the first direction, a third through hole 223 is formed on the extension portion 22 and penetrates through the first surface 221 and the second surface 222, and the insulating member 4 is filled into the second gap 52 through the third through hole 223. Wherein, the first direction is the direction shown by the arrow. Referring to fig. 6, the number of the third through holes 223 may be one or more, when the number of the third through holes 223 is plural, the third through holes 223 are disposed at intervals on the extension portion 22, the third through holes 223 may be square, circular or other irregular shapes, and when the third through holes 223 are rectangular, the length of the third through holes 223 is made to be a mm, and the width thereof is made to be b mm, then: a/b =0.1 to 7.
In some embodiments, referring to fig. 5, the third via 223 has an area S on the first surface 221 1 If the area of the first surface 221 is S, it satisfies: 0<S 1 S is less than or equal to 0.8; further satisfies the following conditions: S1/S is more than or equal to 0.001 and less than or equal to 0.5. Wherein the area S of the third via 223 on the first surface 221 1 It can be understood as the geometric area of the profile formed on the first surface 221 by the opening of the third through hole 223, and the profile can be a squareA shape, a circle, or other irregular shape, the shape of the outline may be substantially as described above, and is not limited to a perfect geometric shape. The area S of the first surface 221 represents the area of the outer periphery of the extension 22.
In some embodiments, since the filling of the insulator 4 will directly affect the installation performance of the terminal 3, ensuring the complete filling of the insulator 4 is a key factor for improving the assembly and insulation of the terminal 3, and referring to fig. 7 and 8, the blocking portion 21 has a third surface 212 and a fourth surface 213 facing away from each other in the second direction, and the blocking portion 21 is provided with a groove 224 penetrating through the third surface 212 and the fourth surface 213; the insulating member 4 is filled to the second gap 52 through the groove 224. The grooves 224 can directly extend to the extension portions 22, the grooves 224 are formed, so that the filling degree of the insulating member 4 can be improved, the number of the grooves 224 is not limited to one, and after the grooves 224 are formed, the blocking portions 21 are spaced by the grooves 224, so that the blocking portions 21 are spaced by the insulating member 4 after the insulating member 4 is filled, part of the insulating member 4 surrounds the blocking portions 21, and the structural strength of integral forming can be further improved. Wherein the second direction is a direction of a vertical arrow in fig. 8, preferably, the second direction is a direction perpendicular to the first direction.
In some embodiments, referring to fig. 9 and 10, based on the structure of the spacer 2 shown in fig. 6, the blocking portion 21 has a third surface 212 and a fourth surface 213 facing away from each other along the second direction, a fourth through hole 214 penetrating through the third surface 212 and the fourth surface 213 is formed on the blocking portion 21, and the insulating member 4 is filled into the second gap 52 through the fourth through hole 214. Through setting up fourth through hole 214, can further strengthen the cohesion of being connected between utmost point post 3 and the space ring 2. Wherein the second direction is a direction indicated by a vertical arrow in fig. 10, and preferably, the second direction is a direction perpendicular to the first direction.
In some embodiments, the third through-hole 223 and the fourth through-hole 214 satisfy: 1mm in diameter 2 ≤S 1 ≤30mm 2 ；0.1mm 2 ≤S 2 ≤20mm 2 (ii) a Wherein S is 1 Denotes the area, S, of the third via 223 on the first surface 221 2 Showing a fourth via 214 on the third surface 212The area of (a). It can be appreciated that the area of the third through-hole 223 on the first surface 221 is S 1 It can be understood that the geometric area of the outline formed by the opening of the third through hole 223 on the first surface 221 and the area of the fourth through hole 214 on the third surface 212 is S 2 It can be understood as a geometric area of a contour formed on the third surface 212 by the opening of the fourth through hole 214. The profile may be square, circular or other irregular shape, and the shape of the profile is substantially as described above, and is not limited to a perfect geometric shape. By defining the area of the third through hole 223 or the fourth through hole 214, that is, further defining the outline area of the opening of the third through hole 223 or the fourth through hole 214, the stability of the connection after the insulator 4 passes through the through holes can be further increased. If the area of the third through hole 223 or the fourth through hole 214 is small, the injection of the insulating member 4 is not facilitated.
In some embodiments, S 1 And S 2 Further preferred ranges are: 4mm 2 ≤S 1 ≤15mm 2 And 0.78mm 2 ≤S 2 ≤12mm 2 。
In some embodiments, the cage 2 further satisfies: the third surface 212 and the fourth surface 213 are parallel to the top cover 1, wherein parallel means completely parallel or almost completely parallel, for example, parallel is counted within 5 ° of completely parallel; the distance between the third surface 212 and the fourth surface 213 is 0.4-1.5 mm; the distance between the first surface 221 and the second surface 222 is 0.4-1.5 mm; preferably, to facilitate the machining of the cage 2, the distance between the third surface 212 and the fourth surface 213 and the distance between the first surface 221 and the second surface 222 are equal.
In some embodiments, the spacer 2 is integrally of a unitary structure, and the barrier portion 21 and the extension portion 22 are in a circular arc transition connection, or the extension portion 22 and the connecting portion 23 are in a circular arc transition connection; the arc transition connection between the blocking portion 21 and the extending portion 22 can be represented as an arc transition connection between the third surface 212 located at the outside and the first surface 221, where the radius of the outer arc is 0.1-1.5 mm, and an arc transition connection between the fourth surface 213 located at the inside and the second surface 222, where the radius of the inner arc is 0.1-2 mm; similarly, the arc transition connection between the extension portion 22 and the connection portion 23 specifically means that the surface of the extension portion 22 and the surface of the connection portion 23 which are located on the same side are in arc transition connection, the inner side of the transition arc between the extension portion 22 and the connection portion 23 is a right angle, and the radius of the outer arc is 0.1-2 mm.
In some embodiments, to further improve the ease of assembly, the spacer 2 may also be a split structure, i.e. the blocking portion 21 and the extension portion 22 are split structures; or the extension portion 22 and the connection portion 23 are of a split structure. Referring to fig. 11 to 12, the blocking portion 21 and the extending portion 22 are of a split structure, a gap between the blocking portion 21 and the extending portion 22 is used for filling the insulating member 4, and the blocking portion 21, the extending portion 22 and the pole 3 are of an independent integrated structure through the injection-molded insulating member 4.
In some embodiments, the present application also provides a power consumption device, which may employ a secondary battery as shown in fig. 1, and the power consumption device may include, but is not limited to, a backup power source, an electric motor, an electric vehicle, an electric motorcycle, a power assisted bicycle, a bicycle, an electric tool, a large household battery, and the like.
Adopt the secondary battery that this application provided, owing to set up stop part 21 on space ring 2, can play the effect of blockking to insulating part 4 of moulding plastics, can effectively avoid insulating part 4 to use ageing 3 not hard up or the short circuit problem of utmost point post that drops and cause from the top cap after for a long time. Simultaneously, this application has still further injectd the size relation in clearance between space ring 2 and utmost point post 3 for space ring 2 has avoided the size not unified and the poor problem of assembly that leads to when moulding plastics and cooperating with top cap 1.
The foregoing detailed description is directed to a secondary battery and an electric device provided in the embodiments of the present application, and the principles and embodiments of the present application are described in detail by applying specific examples, and the description of the foregoing embodiments is only used to help understanding the technical solutions and the core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (15)
1. A secondary battery, characterized by comprising:
the top cover (1), wherein a first through hole (11) is formed in the top cover (1);
the space ring (2), the space ring (2) comprises a blocking part (21), an extending part (22) and a connecting part (23), the blocking part (21) is connected with the extending part (22), the connecting part (23) is connected with the extending part (22), and the connecting part (23) is positioned on one side, away from the blocking part (21), of the extending part (22); the blocking part (21) is provided with a second through hole (211), and the extension part (22) is arranged around the first through hole (11) so as to enable the second through hole (211) to correspond to the first through hole (11);
the pole post (3) is positioned in the second through hole (211), and the connecting part (23) is connected with the top cover (1) so as to enclose the blocking part (21), the extending part (22), the top cover (1) and the pole post (3) to form a cavity (5);
an insulator (4), the insulator (4) being arranged around the spacer ring (2) and filling at least part of the cavity (5) to fit the pole (3) to the top cap (1).
2. A secondary battery according to claim 1, characterized in that the pole (3) has a first peripheral surface (31) and a second peripheral surface (32) arranged in the circumferential direction, the first peripheral surface (31) being connected to the second peripheral surface (32); the barrier portion (21) and the first peripheral surface (31) have a first gap (51) therebetween, the extension portion (22) and the second peripheral surface (32) have a second gap (52) therebetween, and the insulating member (4) fills at least a part of the first gap (51) and at least a part of the second gap (52).
3. A secondary battery as claimed in claim 2, characterized in that the first gap (51) has a first dimension D in the first direction 1 The second gap (52) having a second directionDimension D 2 Said first dimension D 1 And said second dimension D 2 Satisfies the following conditions: d is more than or equal to 0.1 1 /D 2 Less than or equal to 0.9; wherein D is not less than 0.2mm 1 ≤2mm，0.5mm≤D 2 ≤5mm。
4. The secondary battery according to claim 3, wherein D is 0.2. Ltoreq. D 1 /D 2 Less than or equal to 0.8; wherein D is more than or equal to 0.4mm 1 ≤1mm，0.5mm≤D 2 ≤2mm。
5. The secondary battery according to claim 2, wherein the extension portion (22) has a first surface (221) and a second surface (222) facing away from each other along the first direction, a third through hole (223) penetrating through the first surface (221) and the second surface (222) is formed in the extension portion (22), and the insulating member (4) penetrates through the third through hole (223) and fills at least a part of the second gap (52) and at least a part of the first gap (51).
6. The secondary battery according to claim 5, wherein the area of the third through hole (223) on the first surface (221) is S 1 The area of the first surface (221) is S,0<S 1 S is less than or equal to 0.8; alternatively, the first and second electrodes may be,
the area of the third through hole (223) on the first surface (221) is S 1 The area of the first surface (221) is S, S is more than or equal to 0.001 1 /S≤0.5。
7. A secondary battery according to claim 2, characterized in that the barrier (21) has a third surface (212) and a fourth surface (213) facing away from each other in the second direction, the barrier (21) being provided with a groove (224) extending through the third surface (212) and the fourth surface (213); the insulating piece (4) penetrates through the groove (224) and fills at least part of the second gap (52) and at least part of the first gap (51).
8. A secondary battery according to claim 5, characterized in that the barrier (21) has a third surface (212) and a fourth surface (213) facing away from each other in the second direction, a fourth through hole (214) is provided in the barrier (21) and penetrates the third surface (212) and the fourth surface (213), and the insulator (4) is inserted into the fourth through hole (214) and fills at least part of the second gap (52) and at least part of the first gap (51).
9. The secondary battery according to claim 8, wherein the third through hole (223) and the fourth through hole (214) satisfy:
1mm 2 ≤S 1 ≤30mm 2 (ii) a And/or the presence of a gas in the gas,
0.1mm 2 ≤S 2 ≤20mm 2 ；
wherein S is 1 Represents the area, S, of the third through-hole (223) on the first surface (221) 2 Represents the area of the fourth through hole (214) on the third surface (212).
10. The secondary battery according to claim 9, wherein the third through hole (223) and the fourth through hole (214) satisfy: 4mm 2 ≤S 1 ≤15mm 2 And 0.78mm 2 ≤S 2 ≤12mm 2 。
11. A secondary battery according to claim 8, characterized in that the spacer (2) further satisfies:
said third surface (212) and/or said fourth surface (213) being parallel to said cap (1); alternatively, the first and second electrodes may be,
the distance between the third surface (212) and the fourth surface (213) is 0.4-1.5 mm; alternatively, the first and second electrodes may be,
the distance between the first surface (221) and the second surface (222) is 0.4-1.5 mm.
12. A secondary battery according to claim 1, wherein the barrier portion (21) and the extension portion (22) are of an integral structure or a split structure; and/or the presence of a gas in the gas,
the extension part (22) and the connecting part (23) are of an integrated structure or a split structure.
13. A secondary battery according to claim 1, wherein the barrier portion (21) and the extension portion (22) are connected by a circular transition; and/or the presence of a gas in the gas,
the extension part (22) and the connecting part (23) are in arc transition connection.
14. The secondary battery according to claim 1, further comprising:
the sealing ring (6) is positioned between the pole (3) and the top cover (1), and the sealing ring (6) is respectively abutted against the pole (3) and the top cover (1) to seal the cavity (5);
the lower plastic (7), the lower plastic (7) is connected with the top cover (1), and the lower plastic (7) is positioned on one side, away from the space ring (2), of the top cover (1);
casing (8), casing (8) are including holding chamber (81), top cap (1) with casing (8) are connected and are covered and close hold chamber (81).
15. An electric device comprising the secondary battery according to any one of claims 1 to 14.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223218648.5U CN218788431U (en) | 2022-11-30 | 2022-11-30 | Secondary battery and power utilization device |
| PCT/CN2023/113451 WO2024113968A1 (en) | 2022-11-30 | 2023-08-17 | Secondary battery and electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223218648.5U CN218788431U (en) | 2022-11-30 | 2022-11-30 | Secondary battery and power utilization device |
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| Publication Number | Publication Date |
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| CN218788431U true CN218788431U (en) | 2023-04-04 |
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| CN202223218648.5U Active CN218788431U (en) | 2022-11-30 | 2022-11-30 | Secondary battery and power utilization device |
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| Country | Link |
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| CN (1) | CN218788431U (en) |
| WO (1) | WO2024113968A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113968A1 (en) * | 2022-11-30 | 2024-06-06 | 欣旺达动力科技股份有限公司 | Secondary battery and electrical device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10763466B2 (en) * | 2018-03-09 | 2020-09-01 | Contemporary Amperex Technology Co., Limited | Top cap assembly of a secondary battery, and secondary battery |
| CN209496906U (en) * | 2019-04-01 | 2019-10-15 | 宁德时代新能源科技股份有限公司 | Cap assembly and secondary cell |
| EP3993152A4 (en) * | 2020-09-02 | 2022-10-12 | Contemporary Amperex Technology Co., Limited | End cover assembly, battery cell, battery, powered device, and liquid injection method |
| CN112952243B (en) * | 2020-11-16 | 2023-03-28 | 江苏时代新能源科技有限公司 | End cover assembly, battery monomer, exhaust method, battery and electric device |
| CN218788431U (en) * | 2022-11-30 | 2023-04-04 | 欣旺达电动汽车电池有限公司 | Secondary battery and power utilization device |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113968A1 (en) * | 2022-11-30 | 2024-06-06 | 欣旺达动力科技股份有限公司 | Secondary battery and electrical device |
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| WO2024113968A1 (en) | 2024-06-06 |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |