CN212934729U

CN212934729U - Battery top cap subassembly

Info

Publication number: CN212934729U
Application number: CN202021850063.3U
Authority: CN
Inventors: 彭升政; 蔡桥英; 朱超; 陈俊梯
Original assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Current assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-09
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a battery top cap subassembly, plastic under top cap piece, negative pole post, upset piece and negative pole. It is protruding to have first assembly on the top cap piece, it has first pilot hole and second pilot hole to assemble protruding, the upset piece is in second pilot hole department, the plastic is in first assembly arch under the negative pole, first via hole and second via hole are seted up to the plastic under the negative pole, the setting of the corresponding upset piece of second via hole, second via hole department links to each other in proper order from beginning to end and establishes many first spacer ribs, the one end of adjacent first spacer rib forms first common link, and the contained angle between the adjacent first spacer rib is the acute angle, the right angle or obtuse angle, the edge at the second via hole is connected to the other end of the first spacer rib of avris, first via hole and first pilot hole are stretched out from in proper order at negative pole capital portion, negative pole capital portion backstop is in the bottom of first via hole. The utility model discloses plastic structure under the negative pole still can be strengthened to first spacing rib when providing upset space for the upset piece, improves the intensity of plastic under the negative pole.

Description

Battery top cap subassembly

Technical Field

The utility model belongs to the technical field of the battery is made, specifically a battery top cap subassembly.

Background

In recent years, with global warming, environmental pollution and energy exhaustion, people pay more attention to the problems, new energy industries are developed vigorously, electric vehicles represented by electric bicycles and electric automobiles are paid more attention to technical development and popularization and application, and lithium batteries are outstanding in the new energy industries due to the excellent performances of large energy density, good safety performance, long cycle life, low self-discharge rate and the like. However, in the use process of the lithium battery, gas is easily generated in the shell, so that the pressure in the lithium battery is increased, and the risk of explosion and fire is higher.

In order to prevent the direct explosion of lithium cell, select to set up the upset piece in lithium cell top cap usually, when the too big constant value that reaches of pressure inside the battery, the upset piece upset forms outer short circuit between the positive pole of lithium cell and the negative pole, and there is the heavy current in the twinkling of an eye inside the lithium cell to pass through, and the heavy current produces a large amount of heats, fuses the fusing part of connection piece, reaches the purpose that the lithium cell opened circuit.

Among the prior art, in order to guarantee that the upset piece can normally overturn and lithium cell top cap occupation space is little, the position that corresponds the upset piece under generally sets up the via hole on plastic, but the via hole can reduce the intensity of plastic under the negative pole, receives the striking in-process at the battery, and the plastic easily breaks down under the negative pole.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery top cap subassembly, battery top cap subassembly still can increase the intensity of plastic under the negative pole when leaving certain upset space for the upset piece, has solved the technical problem that plastic intensity is low down among the prior art.

According to the utility model discloses battery top cap subassembly, include: the top cover plate is provided with a first assembling bulge, and the first assembling bulge is provided with a first assembling hole and a second assembling hole; the turnover piece is connected to the second assembling hole; the lower plastic of the negative electrode is matched in the first assembling protrusion, a first via hole and a second via hole are formed in the lower plastic of the negative electrode, the bottom of the negative electrode column is stopped at the bottom of the first via hole, the second via hole is arranged corresponding to the turnover piece, the second via holes are sequentially connected end to end and are provided with a plurality of first spacing ribs, one end of each adjacent first spacing rib forms a first common connecting end, an included angle between each two adjacent first spacing ribs is an acute angle, a right angle or an obtuse angle, and the other end of the first spacing rib at the outermost side is connected with the edge of the second via hole; and the top of the negative pole column sequentially extends out of the first through hole and the first assembly hole, and the bottom of the negative pole column is stopped at the bottom of the first through hole.

According to the utility model discloses battery top cap subassembly through set up many end to end's first spacing rib in second via hole department, and first spacing rib can play the effect of strengthening plastic under the negative pole on the one hand, and the plastic can not be favorable to keeping the form because of setting up the second via hole reduce strength under the negative pole, and on the other hand can ensure that the upset piece can not follow second via hole department whereabouts after the upset, makes the upset piece effectively exert self-action. The utility model provides a battery top cap subassembly upset piece upset when the inside atmospheric pressure of power battery risees, effectively prevents that electric core from further overcharging and explosion from getting on fire, improves power battery life and security performance.

According to the utility model discloses a battery top cap subassembly, first common link is connected the edge of second via hole is located the middle part two of first interval rib first common link is connected respectively the relative both sides edge of second via hole, each first common link all is connected the different department at second via hole edge.

According to the utility model discloses a battery top cap subassembly, at least one first interval rib is just right the upset piece is arranged second through hole department.

According to the battery top cover assembly provided by the utility model, the included angle formed between the two first spacing ribs positioned in the middle part is smaller than the included angle formed between the two first spacing ribs close to the edge; and/or the width dimension of the first spacing rib close to the middle part of the second via hole is smaller than the width dimension of the second via hole at the edge.

According to the utility model discloses a battery top cap subassembly, first common link is located in the second via hole, first common link with the marginal interval setting of second via hole.

Optionally, the battery top cover assembly further comprises a plurality of second spacing ribs, the plurality of second spacing ribs and the first spacing ribs are arranged at intervals in the second via holes, the plurality of second spacing ribs are sequentially connected end to end, two adjacent second spacing ribs form a second shared connecting end, the included angle between the adjacent second spacing ribs is an acute angle, a right angle or an obtuse angle, the other end of the second spacing rib on the most lateral side is connected to the edge of the second via hole, and the second shared connecting end and the edge of the second via hole are arranged at intervals.

According to the battery top cover assembly provided by the utility model, the top cover plate is provided with the second assembling protrusions, the second assembling protrusions and the first assembling protrusions are respectively arranged at two ends of the top cover plate, and the second assembling protrusions are provided with the third assembling holes; the battery top cover assembly further comprises a positive pole and positive pole lower plastic, and the top of the positive pole extends out of the third assembling hole; the plastic cooperation is in under the positive pole in the second assembly arch, third via hole and fourth via hole have been seted up on the plastic under the positive pole, the bottom backstop of anodal post is in the bottom of third via hole, the third via hole with the fourth via hole interval is seted up on the plastic under the positive pole.

Optionally, a first fitting flange is convexly arranged at the bottom of the lower negative electrode plastic in a downward protruding manner, the first fitting flange is arranged in the circumferential direction of the first via hole, the negative electrode post comprises a first connecting plate at the lower part and a first connecting post at the upper part, the side wall of the first connecting plate is abutted against the first fitting flange, the bottom wall of the first connecting plate is flush with the first fitting flange, and the first connecting post extends out of the first via hole and the first assembling hole; the bottom downward protrusion of plastic is equipped with second cooperation flange under the positive pole, second cooperation flange is established the circumference of third via hole, the positive post includes the second connecting plate of bottom and the second spliced pole on upper portion, the lateral wall of second connecting plate with second cooperation flange butt, the diapire of second connecting plate with second cooperation flange parallel and level, the second spliced pole is followed the third via hole with the third pilot hole stretches out.

Optionally, the plastic is kept away from under the negative pole the one end of plastic is equipped with downwardly extending's first joint spare under the positive pole, keeping away from of plastic under the positive pole the one end of plastic is equipped with downwardly extending's second joint spare under the negative pole, battery top cap subassembly still includes the support, the both ends of support be equipped with respectively with the first buckle that first joint spare joint is connected and with the second buckle that second joint spare joint is connected.

Optionally, one side of the negative electrode lower plastic close to the positive electrode lower plastic extends upwards to form a second protrusion, and the second protrusion abuts against the bottom surface of the top cover plate; one side, close to the lower plastic of the negative electrode, of the lower plastic of the positive electrode extends upwards to form a third bulge, and the third bulge is abutted to the bottom surface of the top cover plate; a first jack is formed between the second protrusion and the side wall of the cathode lower plastic, and a first inserting part which is inserted and matched with the first jack is arranged on the support; and a second jack is formed between the third protrusion and the side wall of the anode lower plastic, and a second inserting part which is inserted and matched with the second jack is arranged on the support.

Additional aspects and advantages of the invention will be set forth in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a battery top cap assembly according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a plastic under a negative electrode according to a first embodiment of the present invention.

Fig. 3 is a schematic perspective view of a plastic under a negative electrode according to a second embodiment of the present invention.

Fig. 4 is a schematic perspective view of a plastic under a negative electrode according to a third embodiment of the present invention.

Fig. 5 is a schematic perspective view of a plastic under the positive electrode according to an embodiment of the present invention.

Fig. 6 is an exploded view of a power battery according to an embodiment of the present invention.

Reference numerals:

100. a battery top cap assembly;

1. a top cover sheet;

11. a first fitting projection; 111. a first assembly hole; 112. a second assembly hole;

12. a second fitting projection; 121. a third assembly hole;

13. a fourth assembly hole;

14. a fifth assembly hole;

2a, a negative pole column; 21. a first connecting plate; 22. a first connecting column;

2b, a first sealing ring;

3. turning over the sheet;

4. plastic under the negative electrode;

41. a first via hole;

42. a second via hole;

43. a first mating flange;

44. a first clip member;

45. a second protrusion;

46. a first jack;

47. a first spacer rib; 471. a first common connection terminal;

48. a second spacer rib; 481. a second common connection terminal;

5a, a positive pole; 51. a second connecting plate; 52. a second connecting column;

5b, a second sealing ring;

6. plastic cement under the anode;

61. a third via hole; 62. a fourth via hole; 63. a second mating flange;

64. a second clip member; 65. a third protrusion; 66. a second jack; 67. a fifth via hole;

7. a support; 71. a first buckle; 72. a second buckle; 73. a first insertion part; 74. a second insertion part;

8. an explosion-proof sheet;

9. a negative electrode aluminum block; 91. a first through hole;

10. a positive electrode aluminum block; 101. a second through hole;

200. a power battery;

210. a housing; 220. and (5) battery cores.

Detailed Description

Reference will now be made in detail to 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 function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "horizontal", "top", "bottom", "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 simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The battery top cover assembly 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

According to the utility model discloses battery top cap subassembly 100, as shown in fig. 1, include: top cover plate 1, negative pole post 2a, upset piece 3 and plastic 4 under the negative pole.

As shown in fig. 1, a first assembling protrusion 11 is provided on the top cover plate 1, a first assembling hole 111 and a second assembling hole 112 are provided on the first assembling protrusion 11, and the turning plate 3 is connected to the second assembling hole 112.

The negative electrode lower plastic 4 is fitted in the first fitting projection 11. That is, the negative electrode lower plastic 4 is connected to the top cover sheet 1 through the first fitting projection 11.

As shown in fig. 1, a first via hole 41 and a second via hole 42 are formed in the lower plastic 4 of the negative electrode, the second via hole 42 is disposed corresponding to the flip sheet 3, the second via holes 42 are connected end to end in sequence and are provided with a plurality of first partition ribs 47, a first common connection end 471 is formed at one end of each adjacent first partition rib 47, an included angle between each adjacent first partition rib 47 is an acute angle, a right angle or an obtuse angle, and the other end of the first partition rib 47 at the outermost side is connected to the edge of the second via hole 42.

The top of the negative pole 2a extends from the first through hole 41 and the first fitting hole 111 in sequence, and the bottom of the negative pole 2a stops at the bottom of the first through hole 41.

According to the structure, the utility model discloses battery top cap subassembly 100 through set up first assembly arch 11 on top cap piece 1, at the in-process of battery top cap subassembly 100 assembly, the protruding 11 of first assembly of accessible is plastic 4 gomphosis under with the negative pole on top cap piece 1, and the location is quick during the assembly, and connection quality is high, is favorable to the compact of battery top cap subassembly 100 to be arranged.

The top of the negative pole post 2a extends out of the first through hole 41 and the first assembling hole 111 respectively, and at this time, the negative pole post 2a can play a role of connecting the top cover plate 1 and the negative pole lower plastic 4.

The second via hole 42 corresponds the setting of upset piece 3, and second via hole 42 leaves enough space for the upset of upset piece 3 on the one hand, and on the other hand is favorable to the circulation of air, ensures that upset piece 3 overturns when power battery 200 internal pressure risees to a definite value.

The second via holes 42 are connected end to end in sequence and are provided with a plurality of first partition ribs 47, and one end of each adjacent first partition rib 47 forms a first common connection end 471. Adjacent first spacing rib 47 can support each other, ensure that many first spacing ribs 47 are stable in second via hole 42 department position, first spacing rib 47 is used for improving the intensity of plastic 4 under the negative pole, make plastic 4 be difficult for taking place deformation or fracture in second via hole 42 department under the negative pole, improve the life of plastic 4 under the negative pole, and first spacing rib 47 also can not hinder the circulation of air when strengthening plastic 4 structure under the negative pole, it can effectively overturn to ensure that power battery 200 internal pressure is too big upset piece 3.

The other end of the outermost first partition rib 47 is connected to the edge of the second via hole 42. That is, one end of the first partition rib 47 at the outermost side is connected to the adjacent first partition rib 47, and the other end is connected to the edge of the second via hole 42, so that the first partition rib 47 is supported at the second via hole 42, the local strength at the second via hole 42 is increased, and the position of the first partition rib 47 in the second via hole 42 is ensured to be stable.

It can be understood that, the battery top cover assembly 100 of this application, when improving the intensity of plastic 4 under the negative pole, ensuring overall structure is compact, still can ensure that the upset piece 3 can not follow second via hole 41 whereabouts after the upset, effectively prevents that the edge of upset piece 3 from taking place to strike power battery 200's electric core 220, has promoted the security performance.

Optionally, as shown in fig. 1, the battery top cap assembly 100 further includes a negative aluminum block 9. Negative pole aluminium pig 9 is laid at the upper surface of top cap piece 1 and is connected with top cap piece 1 insulation, and negative pole aluminium pig 9 corresponds first pilot hole 111 and is equipped with first through-hole 91, and the top of negative pole post 2a is connected with negative pole aluminium pig 9 through first through-hole 91, and the one end meeting butt after the upset of upset piece 3 is at the side of negative pole aluminium pig 9.

Alternatively, the included angle between the adjacent first partition ribs 47 is an acute angle. The distance between the adjacent first spacing ribs 47 is small, so that the turnover sheet 3 is prevented from being flushed out of the second through holes 42 after being turned over, air circulation is facilitated, and the turnover sheet 3 can be effectively turned over when the internal pressure of the power battery 200 is too large.

Alternatively, the included angle between the adjacent first partition ribs 47 is a right angle. That is, the distance between the first partition ribs 47 can be relatively increased, the strength of the plastic 4 under the negative electrode can be improved, and the number of the first partition ribs 47 can be reduced, so that the production cost of the cell top cover assembly 100 can be reduced, and the light weight of the cell top cover assembly 100 can be realized.

Alternatively, the included angle between the adjacent first partition ribs 47 is an obtuse angle. The distance between the adjacent first partition ribs 47 can be further increased, the number of the first partition ribs 47 used can be reduced, the production cost of the battery top cover assembly 100 can be reduced, and the practicability can be improved.

Optionally, the height of the first spacer ribs 47 is lower than the height of the first vias 42. The space between the turnover sheet 3 and the lower plastic 4 of the negative electrode is increased, and a certain turnover space is reserved for the turnover sheet 3, so that the turnover sheet 3 can be turned over smoothly in the turnover process without contacting with the first spacing ribs 47.

In some embodiments of the present invention, as shown in fig. 1 and 2, the first common connection end 471 is connected at the edge of the second via hole 42, the two first common connection ends 471 of the first partition rib 47 located at the middle portion are respectively connected at the opposite edges of the second via hole 42, and each first common connection end 471 is connected at different positions of the edge of the second via hole 42. Through connecting first common link 471 on the edge of second via hole 42, the pore wall of second via hole 42 not only is connected with the first spacing rib 47 at edge, still passes through first common link 471 with the first spacing rib 47 at middle part and is connected to improved the joint strength between second via hole 42 and the first spacing rib 47 effectively, make the first spacing rib 47 at middle part position at second via hole 42 stable, improve the intensity of plastic 4 at second via hole 42 department under the negative pole simultaneously, make plastic 4 be difficult for taking place to warp in second via hole 42 department under the negative pole.

Alternatively, the connection between the first common connection end 471 and the second via 42 may be one of soldering or bonding.

In some embodiments of the present invention, at least one first spacer rib 47 is arranged at the second via hole 42 just opposite to the turning sheet 3. At this time, the first spacing ribs 47 can play a role of blocking the flip sheet 3 after the flip sheet 3 is flipped, so as to ensure that the flip sheet 3 cannot be punched out of the via hole after being flipped.

Optionally, the center of the at least one first spacer rib 47 is located at the geometric center of the second via 42. Because the second via hole 42 is arranged corresponding to the flip sheet 3, when the center of the first spacing rib 47 is located at the geometric center of the second via hole 42, the center of the first spacing rib 47 can be located at the center of the flip sheet 3, so that the flip sheet 3 is ensured not to be punched out of the via hole after being flipped.

In some embodiments of the present invention, the size of the included angle formed between the two first partition ribs 47 located at the middle portion is smaller than the size of the included angle formed between the two first partition ribs 47 located near the edge. That is to say, the distance between the two first partition ribs 47 located in the middle of the second via hole 42 is smaller than the distance between the two first partition ribs 47 located at the edge of the second via hole 42, so that the number of the first partition ribs 47 facing the lower portion of the flip piece 3 is increased, the arrangement of the first partition ribs 47 in the second via hole 42 is dense, and the flip piece 3 is ensured not to be flushed out of the second via hole 42 after being flipped.

Optionally, the width dimension of the first spacer rib 47 near the middle of the second via hole 42 is smaller than the width dimension of the second via hole 42 at the edge. Guarantee to have certain clearance between two adjacent first spacer ribs 47, the air of being convenient for circulates from the clearance, and upset piece 3 can effectively overturn when power battery 200 internal pressure is too big, promotes power battery 200's security performance.

Optionally, the size of the included angle formed between the two first partition ribs 47 located at the middle portion is smaller than the size of the included angle formed between the two first partition ribs 47 located near the edge, and the width dimension of the first partition rib 47 located near the middle portion of the second via hole 42 is smaller than the width dimension of the second via hole 42 located at the edge. The overturning plate 3 can be ensured to be effectively overturned when the internal pressure of the power battery 200 is too high, and the overturning plate 3 can not be flushed out of the second through hole 42 after being overturned.

In some embodiments of the present invention, as shown in fig. 3, the first common connection end 471 is located in the second via hole 42, and the first common connection end 471 is spaced apart from an edge of the second via hole 42. That is, a certain interval is left between the first common connection terminal 471 and the edge of the second via hole 42.

Accordingly, the first common connection end 471 can be located in the second via hole 42 by reducing the length of the first partition rib 47, so that the weight of the first partition rib 47 is reduced, and the light weight of the battery top cover assembly 100 is realized.

Optionally, as shown in fig. 4, the battery top cover assembly 100 further includes a plurality of second spacing ribs 48, the plurality of second spacing ribs 48 and the first spacing ribs 47 are arranged in the second through holes 42 at intervals, and the plurality of second spacing ribs 48 are connected end to end in sequence. Through set up second interval rib 48 in second via hole 42, further improve the intensity of plastic 4 under the negative pole, guarantee plastic 4 is difficult for taking place to warp or fracture in second via hole 42 department under the negative pole.

Alternatively, as shown in fig. 4, one end of each of two adjacent second partition ribs 48 forms a second common connection end 481, and an included angle between the adjacent second partition ribs 48 is an acute angle, a right angle, or an obtuse angle. The second common connection end 481 supports the adjacent second spacing ribs 48, so that the position of the second spacing ribs 48 at the second via holes 42 is stable, the second spacing ribs 48 in the present application can have a structure similar to that of the first spacing ribs 47, the length, the width and the number of the second spacing ribs 48 in the present application, and the angle of the adjacent second spacing ribs 48 can also be different from the corresponding parameters of the first spacing ribs 47, and the second spacing ribs 48 and the first spacing ribs 47 are arranged in a matching manner, so that the arrangement flexibility is increased, and the adaptability is increased for the turnover of the turnover piece 3.

Alternatively, the other end of the outermost second barrier rib 48 is connected to the edge of the second via hole 42. The edges of the second via 42 may support the second spacer rib 48, improving the stability of the second spacer rib 48.

Optionally, the second common connection end 481 is spaced apart from the edge of the second via 42. The space between the second common connection end 481 and the second via hole 42 provides a certain arrangement space for the first partition rib 47, facilitating arrangement of the first partition rib 47.

Optionally, the included angle between adjacent second spacer ribs 48 is acute. The effect of the acute included angle between the adjacent first partition ribs 47 is the same, and will not be described herein.

Optionally, the included angle between adjacent second spacer ribs 48 is a right angle. The effect of the right angle included angle between the adjacent first partition ribs 47 is the same, and will not be described herein.

Alternatively, the included angle between adjacent second partition ribs 48 is an obtuse angle. The included angle between the adjacent first partition ribs 47 is the same as the obtuse angle, and will not be described herein.

In some embodiments of the present invention, as shown in fig. 1, the top cap assembly 100 further includes a positive post 5a and a lower positive plastic 6.

As shown in fig. 1, a second assembling protrusion 12 is provided on the top cover plate 1, the second assembling protrusion 12 and the first assembling protrusion 11 are respectively provided at two ends of the top cover plate 1, and the lower plastic 6 of the positive electrode is fitted in the second assembling protrusion 12. That is to say, the one end of top cap piece 1 is equipped with first assembly arch 11, and the other end of top cap piece 1 is equipped with second assembly arch 12, and at the in-process of the assembly of battery top cap subassembly 100, accessible second assembly arch 12, with plastic 6 gomphosis under the positive pole on top cap piece 1, the location is quick during the assembly, and connection quality is high and is favorable to the compact of battery top cap subassembly 100 to be arranged.

Optionally, the thicknesses of the lower plastic 6 of the anode and the lower plastic 4 of the cathode are equal, and the heights of the second assembling protrusion 12 and the first assembling protrusion 11 are on the same horizontal plane, so that on one hand, the top of the top cover plate 1 is ensured to be on the same horizontal plane, and the subsequent assembly is facilitated; on the other hand, the bottoms of the positive electrode lower plastic 6 and the negative electrode lower plastic 4 are on the same horizontal plane, so that the bottoms of the positive electrode post 5a and the negative electrode post 2a are on the same horizontal plane, the assembly of subsequent components (hereinafter, the battery cell 220) is facilitated, and the stability of the assembled power battery 200 is improved.

Optionally, as shown in fig. 1, a third assembling hole 121 is formed in the second assembling protrusion 12, a third through hole 61 and a fourth through hole 62 are formed in the positive lower plastic 6, the top of the positive post 5a sequentially extends out of the third through hole 61 and the third assembling hole 121, the bottom of the positive post 5a stops at the bottom of the third through hole 61, and the third through hole 61 and the fourth through hole 62 are spaced apart from each other on the positive lower plastic 6. The third via hole 61 and the fourth via hole 62 can reduce the weight of the plastic 6 under the anode, so that the light weight of the plastic 6 under the anode is realized, and the anode post 5a extends out of the plastic 6 under the anode through the third via hole 61 and extends into the third assembly hole 121.

Optionally, as shown in fig. 1, the battery top cap assembly 100 further includes a positive aluminum block 10. The positive aluminum block 10 is arranged above the second assembling protrusion 12 and is connected with the top cover plate 1 in an insulating mode, a second through hole 101 is formed in the positive aluminum block 10 corresponding to the third assembling hole 121, and the top of the positive post 5a is connected with the positive aluminum block 10 through the second through hole 101.

Optionally, as shown in fig. 1, the bottom of the lower plastic 4 of the negative electrode protrudes downward to form a first fitting flange 43, the first fitting flange 43 is disposed in the circumferential direction of the first through hole 41, the negative electrode pillar 2a includes a lower first connecting plate 21 and an upper first connecting pillar 22, a side wall of the first connecting plate 21 abuts against the first fitting flange 43, a bottom wall of the first connecting plate 21 is flush with the first fitting flange 43, and the first connecting pillar 22 extends from the first through hole 41 and the first assembling hole 111. The first connection plate 21 is fitted into the first fitting flange 43, and the first fitting flange 43 can define the position of the first connection plate 21, so that the negative pole tab 2a does not shake during the movement of the top cap assembly 100.

Optionally, the length and width of the first connecting plate 21 are greater than the diameter of the first via hole 41, and when the first connecting column 22 protrudes from the first via hole 41, the bottom wall of the first connecting plate 21 abuts against the first via hole 41, and the first connecting plate 21 does not protrude from the first via hole 41.

Alternatively, the first connection post 22 protrudes from the first via hole 41 and the first fitting hole 111 and is connected to the negative electrode aluminum block 9 through the first through hole 91, so that the negative electrode post 2a is electrically connected to the top lid sheet 1.

Optionally, the first connection post 22 is inserted into the first through hole 91. The end part of the first connecting column 22 blocks the first through hole 91, so that external impurities cannot enter the power battery 200 to damage the battery core 220, and the sealing performance of the battery top cover assembly 100 is improved.

Optionally, as shown in fig. 1 and 5, a second fitting flange 63 protrudes downward from the bottom of the lower positive electrode plastic 6, and the second fitting flange 63 is disposed in the circumferential direction of the third through hole 61.

Alternatively, as shown in fig. 1, the positive post 5a includes a bottom second connecting plate 51 and an upper second connecting post 52, the side wall of the second connecting plate 51 abuts against the second mating flange 63, the bottom wall of the second connecting plate 51 is flush with the second mating flange 63, and the second connecting post 52 protrudes from the third through hole 61 and the third fitting hole 121. The second connecting plate 51 is embedded in the second matching flange 63, the second matching flange 63 can limit the position of the second connecting plate 51, and the positive pole 5a does not shake during the movement of the top cover assembly 100.

Optionally, the length and the width of the second connecting plate 51 are both greater than the diameter of the third via hole 61, and when the second connecting column 52 extends from the third via hole 61, the bottom wall of the second connecting plate 51 abuts against the third via hole 61, and the second connecting plate 51 does not extend from the third via hole 61.

Optionally, as shown in fig. 1, one end of the negative electrode lower plastic 4, which is far away from the positive electrode lower plastic 6, is provided with a first clamping piece 44 extending downward, one end of the positive electrode lower plastic 6, which is far away from the negative electrode lower plastic 4, is provided with a second clamping piece 64 extending downward, the battery top cover assembly 100 further includes a support 7, and two ends of the support 7 are respectively provided with a first buckle 71 connected with the first clamping piece 44 in a clamping manner and a second buckle 72 connected with the second clamping piece 64 in a clamping manner. The cooperation through first joint spare 44 and first buckle 71, the cooperation of second joint spare 64 and second buckle 72 make support 7 fixed connection on top cover plate 1, improve support 7's assembly efficiency.

Optionally, the support 7 includes two, and two supports 7 design into same money structure, and two supports 7 symmetry sets up in the both sides of top cap piece 1, conveniently process support 7, also are favorable to rapid Assembly support 7, and the support 7 that has assembled has sufficient support intensity, ensures that each part in the battery top cap subassembly 100 can not take place to rock.

Optionally, as shown in fig. 1, one side of the negative electrode lower plastic 4 close to the positive electrode lower plastic 6 extends upward to form a second protrusion 45, and the second protrusion 45 abuts against the bottom surface of the top cover plate 1. So that the friction between the negative electrode lower plastic 4 and the top cover plate 1 is increased, and in the moving process of the battery top cover assembly 100, the second protrusion 45 can reduce the shaking frequency of the negative electrode lower plastic 4, thereby improving the stability of the battery top cover assembly 100.

Optionally, as shown in fig. 1, a third protrusion 65 is formed by extending upward a side of the cathode lower plastic 6 close to the cathode lower plastic 4, and the third protrusion 65 abuts against the bottom surface of the top cover plate 1. So that the friction between the plastic 6 and the top cover plate 1 under the positive electrode is increased, and in the moving process of the battery top cover assembly 100, the third protrusion 65 can reduce the shaking frequency of the plastic 6 under the positive electrode, thereby improving the stability of the battery top cover assembly 100.

Optionally, as shown in fig. 2, a first insertion hole 46 is formed between the second protrusion 45 and the side wall of the negative electrode lower plastic 4, and a first insertion portion 73 that is inserted into and matched with the first insertion hole 46 is disposed on the bracket 7. Through the cooperation use of first jack 46 and first grafting portion 73, first jack 46 can play the guide effect to the removal of support 7, improves assembly efficiency to on plastic 4 under the negative pole with the partial joint of support 7, make support 7 and negative pole down connect stably between the plastic 4.

Optionally, as shown in fig. 5, a second insertion hole 66 is formed between the third protrusion 65 and the side wall of the cathode lower plastic 6, and a second insertion portion 74 that is inserted into and matched with the second insertion hole 66 is disposed on the bracket 7. Through the cooperation use of second jack 66 and second grafting portion 74, second jack 66 can play the guide effect to the removal of support 7, improves assembly efficiency to on plastic 6 under the anodal partial joint of support 7, make support 7 and anodal down connect stably between the plastic 6.

In some embodiments of the utility model, as shown in fig. 1, battery top cap subassembly 100 still includes first sealing washer 2b and second sealing washer 5b, first sealing washer 2b cup joints on negative pole post 2a, second sealing washer 5b cup joints on positive pole post 5a, first sealing washer 2b and second sealing washer 5b can improve battery top cap subassembly 100's leakproofness, make power battery 200 inside can not reveal because of electrolyte and corrode circuit board and electronic components and parts and take place the short circuit, promote power battery 200's performance and security.

Optionally, as shown in fig. 1, a fourth assembly hole 13 is provided on the top cover plate 1 near the third assembly hole 121, a fifth through hole 67 is provided on the plastic 6 under the positive electrode near the third protrusion 65, the battery top cover assembly 100 further includes a liquid injection valve (not shown in the figure), the liquid injection valve is limited in the fourth assembly hole 13, and the bottom of the liquid injection valve passes through the fifth through hole 67. The top end of the liquid injection valve can extend into the power battery 200 by arranging the fourth assembly hole 13 and the fifth through hole 67, so that the liquid injection valve can inject the electrolyte into the power battery 200.

Alternatively, as shown in fig. 1, a fifth assembly hole 14 is provided in the middle of the top cover sheet 1, and the battery top cover assembly 100 further includes an explosion-proof sheet 8, and the explosion-proof sheet 8 is mounted in the fifth assembly hole 14. The explosion-proof sheet 8 can be exploded when the internal air pressure of the top cover assembly 100 is too high, and the air pressure in the top cover assembly 100 is released through the fifth assembly hole 14, so that the power battery 200 cannot explode due to the too high internal air pressure.

In the description of the present invention, the features defined as "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.

The utility model discloses a battery top cap subassembly 100 is mainly used on power battery 200, guarantees power battery 200's job stabilization nature and safety in utilization.

Alternatively, as shown in fig. 6, the power battery 200 includes: battery top cap assembly 100, housing 210, and cells 220.

The battery top cover assembly 100 is the battery top cover assembly 100, and as shown in fig. 1, the battery top cover assembly 100 includes a positive post 5a and a negative post 2 a.

The battery top cap assembly 100 is mounted on the upper portion of the outer case 210. That is, the battery top cap assembly 100 covers the upper end of the outer case 210 to be open, so that the outer case 210 forms an enclosed space.

The battery cell 220 is disposed in the casing 210, and the battery cell 220 is electrically connected to the positive pole 5a and the negative pole 2a, respectively. Here, the battery top cap assembly 100 is mounted on the upper portion of the battery cell 220, and the battery cell 220 is connected to an external element through the positive and

negative posts

5a and 2 a.

According to the above structure, the utility model discloses power battery 200, through adopting aforementioned battery top cap subassembly 100, when electric core 220 is taking place to overcharge, when the inside high-pressure gas that produces of electric core 220, the high-pressure gas can be followed second via hole 42 and flowed in battery top cap subassembly 100, because gaseous continuous production, make upset piece 3 pressurized upset, realize electric core 220 short circuit, in time stop the action of charging to electric core 220 of external power supply, thereby protection electric core 220, improve the security of electric core 220 charging process. By arranging the battery cell 220 in the casing 210, when the power battery 200 is squeezed in the actual use process, the casing 210 can protect the battery cell 220, and the working stability and the use safety of the battery cell 220 are ensured.

The specific structure of the battery top cover assembly 100 according to the embodiment of the present invention will be described with reference to the drawings. The embodiments of the present invention may be all embodiments combined by the foregoing technical solutions, and are not limited to the following specific embodiments.

Example 1

A battery top cap assembly 100, as shown in fig. 1, comprising: top cover plate 1, negative pole post 2a, upset piece 3 and plastic 4 under the negative pole.

The lower plastic 4 of the negative electrode is matched in the first assembling protrusion 11, as shown in fig. 1, a first via hole 41 and a second via hole 42 are formed in the lower plastic 4 of the negative electrode, the second via hole 42 is arranged corresponding to the turnover sheet 3, the second via holes 42 are connected end to end in sequence and are provided with a plurality of first spacing ribs 47, one end of each adjacent first spacing rib 47 forms a first common connecting end 471, an included angle between every two adjacent first spacing ribs 47 is an acute angle, and the other end of the first spacing rib 47 at the outermost side is connected to the edge of the second via hole 42.

Example 2

A battery top cover assembly 100, different from embodiment 1, in embodiment 1, as shown in fig. 2, a first common connection end 471 is connected to an edge of a second via hole 42, two first common connection ends 471 of a first partition rib 47 located in the middle are respectively connected to two opposite side edges of the second via hole 42, and each first common connection end 471 is connected to a different position of the edge of the second via hole 42.

At least one first spacer rib 47 is arranged at the second via hole 42 opposite to the flip sheet 3.

Example 3

A battery top cover assembly 100, which is different from embodiment 1, in embodiment 1, as shown in fig. 3, a first common connection terminal 471 is located in a second via hole 42, and the first common connection terminal 471 is spaced apart from an edge of the second via hole 42.

Example 4

Different from embodiment 1, in the battery top cover assembly 100, as shown in fig. 4 based on embodiment 1, the battery top cover assembly 100 further includes a plurality of second partition ribs 48, the plurality of second partition ribs 48 and the first partition ribs 47 are arranged in the second through holes 42 at intervals, the plurality of second partition ribs 48 are sequentially connected end to end, one end of each of two adjacent second partition ribs 48 forms a second common connection end 481, an included angle between the adjacent second partition ribs 48 is an acute angle, and the other end of the second partition rib 48 at the outermost side is connected to the edge of the second through hole 42.

Example 5

A battery top cover assembly 100, which is different from embodiment 1, in addition to embodiment 1, as shown in fig. 1, the battery top cover assembly 100 further includes a positive post 5a and a positive lower plastic 6.

As shown in fig. 1, a second assembling protrusion 12 is provided on the top cover plate 1, the second assembling protrusion 12 and the first assembling protrusion 11 are respectively provided at two ends of the top cover plate 1, and a third assembling hole 121 is provided on the second assembling protrusion 12.

The anode lower plastic 6 is fitted in the second fitting projection 12.

As shown in fig. 1, a third via hole 61 and a fourth via hole 62 are formed in the lower positive electrode plastic 6, the top of the positive electrode pillar 5a sequentially extends out of the third via hole 61 and the third assembling hole 121, the bottom of the positive electrode pillar 5a is stopped at the bottom of the third via hole 61, and the third via hole 61 and the fourth via hole 62 are spaced apart from each other and arranged on the lower positive electrode plastic 6.

Example 6

A battery top cover assembly 100 is different from embodiment 5 in that, on the basis of embodiment 5, as shown in fig. 1, a first clamping member 44 extending downward is disposed at an end of the negative electrode lower plastic 4 away from the positive electrode lower plastic 6, and a second clamping member 64 extending downward is disposed at an end of the positive electrode lower plastic 6 away from the negative electrode lower plastic 4.

As shown in fig. 1, the battery top cover assembly 100 further includes a bracket 7, and a first buckle 71 connected with the first clamping member 44 in a clamping manner and a second buckle 72 connected with the second clamping member 64 in a clamping manner are respectively disposed at two ends of the bracket 7.

One side that plastic 4 is close to plastic 6 under the positive pole under the negative pole upwards stretches out and forms second arch 45, the protruding bottom surface of 45 butt top sheet 1 of second, and one side that plastic 6 is close to plastic 4 under the negative pole under the positive pole upwards stretches out and forms third arch 65, the bottom surface of third arch 65 butt top sheet 1.

A first jack 46 is formed between the second protrusion 45 and the side wall of the cathode lower plastic 4, and a first inserting portion 73 which is inserted and matched with the first jack 46 is arranged on the bracket 7.

A second jack 66 is formed between the third protrusion 65 and the side wall of the anode lower plastic 6, and a second inserting portion 74 which is inserted and matched with the second jack 66 is arranged on the bracket 7.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Other components of the battery top cap assembly 100 according to the embodiment of the present invention, such as the material and structure of the first sealing ring 2b and the second sealing ring 5b, are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery top cap assembly, comprising:

the top cover plate is provided with a first assembling bulge, and the first assembling bulge is provided with a first assembling hole and a second assembling hole;

the turnover piece is connected to the second assembling hole;

the lower negative electrode plastic is matched in the first assembling protrusion, a first via hole and a second via hole are formed in the lower negative electrode plastic, the second via hole is arranged corresponding to the turnover sheet, the second via holes are connected end to end in sequence and provided with a plurality of first spacing ribs, one end of each adjacent first spacing rib forms a first common connecting end, an included angle between each two adjacent first spacing ribs is an acute angle, a right angle or an obtuse angle, and the other end of the first spacing rib at the most lateral side is connected to the edge of the second via hole;

and the top of the negative pole column sequentially extends out of the first through hole and the first assembly hole, and the bottom of the negative pole column is stopped at the bottom of the first through hole.

2. The cell header assembly of claim 1, wherein the first common connection end is connected to an edge of the second via hole, two of the first common connection ends of the first partition rib in the middle are respectively connected to opposite side edges of the second via hole, and each of the first common connection ends is connected to a different position of the second via hole edge.

3. The battery top cap assembly of claim 1, wherein at least one of said first spacing ribs is disposed at said second aperture opposite said flip piece.

4. The battery top cap assembly of claim 1, wherein the included angle formed between two first spacing ribs in the middle portion is smaller than the included angle formed between two first spacing ribs near the edge; and/or the width dimension of the first spacing rib close to the middle part of the second via hole is smaller than the width dimension of the second via hole at the edge.

5. The battery header assembly of claim 1, wherein the first common connection end is located in the second via, the first common connection end being spaced from an edge of the second via.

6. The battery top cap assembly of claim 5, further comprising a plurality of second spacing ribs, wherein the plurality of second spacing ribs and the first spacing ribs are arranged in the second through holes at intervals, the plurality of second spacing ribs are sequentially connected end to end, one end of each of two adjacent second spacing ribs forms a second common connection end, an included angle between the adjacent second spacing ribs is an acute angle, a right angle or an obtuse angle, the other end of the second spacing rib at the outermost side is connected to the edge of the second through hole, and the second common connection end is arranged at an interval with the edge of the second through hole.

7. The battery top cover assembly according to claim 1, wherein the top cover piece is provided with second assembling protrusions, the second assembling protrusions and the first assembling protrusions are respectively arranged at two ends of the top cover piece, and the second assembling protrusions are provided with third assembling holes;

the battery top cap subassembly still includes plastic under positive post and the positive pole, the plastic cooperation is in under the positive pole in the second assembly arch, third via hole and fourth via hole have been seted up under the positive pole on the plastic, the top of positive post is followed in proper order the third via hole with stretch out in the third pilot hole, the bottom backstop of positive post is in the bottom of third via hole, the third via hole with the fourth via hole interval is seted up under the positive pole on the plastic.

8. The battery top cap assembly of claim 7, wherein the bottom of the lower negative plastic protrudes downward to form a first fitting flange, the first fitting flange is arranged at the periphery of the first through hole, the negative pole comprises a lower first connecting plate and an upper first connecting pole, the side wall of the first connecting plate abuts against the first fitting flange, the bottom wall of the first connecting plate is flush with the first fitting flange, and the first connecting pole protrudes from the first through hole and the first assembling hole;

the bottom downward protrusion of plastic is equipped with second cooperation flange under the positive pole, second cooperation flange is established the circumference of third via hole, the positive post includes the second connecting plate of bottom and the second spliced pole on upper portion, the lateral wall of second connecting plate with second cooperation flange butt, the diapire of second connecting plate with second cooperation flange parallel and level, the second spliced pole is followed the third via hole with the third pilot hole stretches out.

9. The battery top cover assembly according to claim 7, wherein one end of the negative electrode lower plastic, which is far away from the positive electrode lower plastic, is provided with a first clamping member extending downwards, one end of the positive electrode lower plastic, which is far away from the negative electrode lower plastic, is provided with a second clamping member extending downwards, the battery top cover assembly further comprises a support, and two ends of the support are respectively provided with a first buckle connected with the first clamping member in a clamping manner and a second buckle connected with the second clamping member in a clamping manner.

10. The battery top cap assembly of claim 9, wherein a side of the negative electrode lower plastic adjacent to the positive electrode lower plastic protrudes upward to form a second protrusion, and the second protrusion abuts against a bottom surface of the top cap sheet; one side, close to the lower plastic of the negative electrode, of the lower plastic of the positive electrode extends upwards to form a third bulge, and the third bulge is abutted to the bottom surface of the top cover plate;

a first jack is formed between the second protrusion and the side wall of the cathode lower plastic, and a first inserting part which is inserted and matched with the first jack is arranged on the support;

and a second jack is formed between the third protrusion and the side wall of the anode lower plastic, and a second inserting part which is inserted and matched with the second jack is arranged on the support.