CN212934728U - Battery top cap subassembly and have its power battery - Google Patents

Abstract

The utility model discloses a battery top cap subassembly and have its power battery, battery top cap subassembly include plastic under top cap piece, negative pole post, upset piece and the negative pole. First assembly arch is established to the top sheet, first pilot hole and second pilot hole are established to first assembly arch, the second pilot hole is connected to the upset piece, the upset piece is equipped with first arch, the plastic cooperation is protruding at first assembly under the negative pole, the plastic is equipped with first via hole and second via hole under the negative pole, negative pole column bottom stretches out from first via hole, the second via hole corresponds the upset piece setting, and establish at least one first spacer rib, the separation of first spacer rib is at the second via hole, first concave part is established to first spacer rib corresponding first arch, negative pole column top stretches out from first via hole and first pilot hole, negative pole column bottom backstop first via hole bottom. The embodiment of the utility model provides a through set up on first interval rib with first protruding complex first concave part down, still provide sufficient upset space for the upset piece when playing to strengthen plastic structure under the negative pole.

Description

Battery top cap subassembly and have its power battery

Technical Field

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

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.

The utility model discloses still aim at providing a power battery who has above-mentioned battery top cap subassembly.

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 and provided with a downward first bulge; the lower cathode plastic is matched in the first assembling protrusion, a first via hole and a second via hole are formed in the lower cathode plastic, the bottom of the cathode column is stopped at the bottom of the first via hole, the second via hole is arranged corresponding to the turnover sheet, at least one first spacing rib is arranged on the second via hole, the first spacing rib is stopped at the second via hole, and a first lower concave portion is formed in the first spacing rib corresponding to the first protrusion; 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 first spacing rib on the second via hole, 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 can not follow second via hole whereabouts after the upset piece upset, makes the upset piece effectively exert self effect. The first concave part can reserve enough avoidance space for the overturning of the overturning sheet, so that the overturning sheet is ensured not to touch the first spacing rib to obstruct the overturning of the overturning sheet in the overturning process. 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, still be equipped with at least one second spacing rib on the second via hole, the second spacing rib with first spacing rib alternately sets up second via hole department, just right on the second spacing rib first bellied position is equipped with the second concave part down.

Optionally, the second via hole is provided with a first spacing rib and a second spacing rib which intersect with each other, an intersection center of the first spacing rib and the second spacing rib is located at a geometric center of the second via hole, the first lower concave portion is symmetrical with respect to the intersection center, and the second lower concave portion is symmetrical with respect to the intersection center.

Optionally, the crossing angle of the first partition rib and the second partition rib is 90 degrees, the end surface of the first lower concave portion and the end surface of the second lower concave portion are both inclined, and the bottom surface of the first lower concave portion is flush with the bottom surface of the second lower concave portion.

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.

Optionally, a fourth assembly hole is formed in the top cover piece close to the third assembly hole, a fifth assembly hole is formed in the middle of the top cover piece, the battery top cover assembly further comprises an explosion-proof piece and a liquid injection valve, and the explosion-proof piece is installed in the fifth assembly hole; be close to under the positive pole on the plastic the third arch is equipped with the fifth via hole, it is spacing to be in to annotate the liquid valve in the fourth pilot hole, just the bottom of annotating the liquid valve is followed the fifth hole of crossing passes.

According to the utility model discloses power battery, include: the battery top cover assembly is the battery top cover assembly, and comprises a positive pole and a negative pole; the upper part of the shell is provided with the battery top cover assembly; the battery cell is arranged in the shell and is respectively electrically connected with the positive pole column and the negative pole column.

According to the utility model discloses power battery, through adopting aforementioned battery top cap subassembly, when electric core leads to the internal pressure increase because of overcharging, the upset piece upset of battery top cap subassembly inside, short circuit between power battery's the positive pole and the negative pole, inside having the heavy current to pass through in the twinkling of an eye of power battery, the heavy current produces a large amount of heats, fuses the fusing part of positive pole connection piece to reach the purpose that the battery opened circuit, make power battery's internal pressure can not increase, improve power battery's security.

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 the turning sheet according to an embodiment of the present invention.

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

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

Fig. 5 is a schematic perspective view of a top cover sheet 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; 31. a first protrusion;

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 lower recess;

48. a second spacer rib; 481. a second lower recess;

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;

8a, an explosion-proof sheet; 8b, an explosion-proof sheet protective film;

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, battery top cap subassembly 100 includes: 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, and a first assembling hole 111 and a second assembling hole 112 are provided on the first assembling protrusion 11.

The flip-chip 3 is connected to the second fitting hole 112, and as shown in fig. 2, the flip-chip 3 is provided with a downward first protrusion 31.

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, at least one first partition rib 47 is disposed on the second via hole 42, the first partition rib 47 is blocked at the second via hole 42, and a first downward concave portion 471 is disposed on the first partition rib 47 corresponding to the first protrusion 31.

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.

At least one first spacing rib 47 is arranged on the second via hole 42, and the first spacing rib 47 improves the strength of the negative electrode lower plastic 4, so that the negative electrode lower plastic 4 is not easy to deform or break at the second via hole 42, and the service life of the negative electrode lower plastic 4 is prolonged. The first partition ribs 47 do not obstruct the circulation of air while reinforcing, ensuring that the inversion sheet 3 can be effectively inverted when the internal pressure of the power battery 200 is too high.

The first lower concave portion 471 is disposed corresponding to the first protrusion 31. The first concave portion 471 increases the distance between the flip sheet 3 and the lower plastic 4 of the negative electrode while ensuring the compactness of the battery top cover assembly 100, and leaves a certain turning space for the first protrusion 31, so that the flip sheet 3 can be smoothly turned during the turning process without contacting the first partition ribs 47.

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, guaranteeing overall structure is compact, still can increase the distance between plastic 4 under upset piece 3 and the negative pole, makes upset piece 3 normally work, effectively prevents that power battery 200 from exploding, 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.

In some embodiments of the present invention, as shown in fig. 3, at least one second spacing rib 48 is further disposed on the second via hole 42, the second spacing rib 48 and the first spacing rib 47 are disposed at the second via hole 42 in a crossing manner, and a second lower recess 481 is disposed on the second spacing rib 48 at a position opposite to the first protrusion 31. The second spacing ribs 48 and the first spacing ribs 47 are arranged in a crossed mode, so that the strength of the plastic 4 under the negative electrode is further improved, the plastic 4 under the negative electrode is not prone to deformation or fracture at the second via holes 42, the second lower concave parts 481 provide certain space for overturning the overturning sheet 3, and the overturning sheet 3 can overturn smoothly in the overturning process and cannot contact with the second spacing ribs 48.

Alternatively, as shown in fig. 3, the second via hole 42 is provided with a first spacing rib 47 and a second spacing rib 48 which intersect with each other, the intersection center of the first spacing rib 47 and the second spacing rib 48 is located at the geometric center of the second via hole 42, the first lower concave part 471 is symmetrical with respect to the intersection center, and the second lower concave part 481 is symmetrical with respect to the intersection center. Because the second via hole 42 is arranged corresponding to the flip sheet 3, and the flip sheet 3 is provided with the downward first protrusion 31, the crossing center of the first spacing rib 47 and the second spacing rib 48 is arranged at the geometric center of the second via hole 42, so that the first concave portion 471 and the second concave portion 481 are opposite to the first protrusion 31, the structural shape of the flip sheet 3 is adapted, enough space is reserved for the flip of the flip sheet 3, and the concave space of the first spacing rib 47 and the second spacing rib 48 can be further expanded by arranging the first concave portion 471 and the second concave portion 481 at the same time, so that the flip sheet 3 can not be hindered from being flipped from any direction, and the normal work of the flip sheet 3 is ensured.

Alternatively, the length of the first lower concave portion 471 is half the length of the first partition rib 47, and the strength of the first partition rib 47 may be improved while ensuring a sufficient turning space.

Optionally, the length of the second lower concave portion 481 is half of the length of the second spacing rib 48, which is the same as the beneficial effect of the first lower concave portion 471, and therefore, the detailed description thereof is omitted.

Alternatively, the crossing angle of the first and second partition ribs 47 and 48 is 90 degrees, the end surface of the first lower concave portion 471 and the end surface of the second lower concave portion 481 are both inclined, and the bottom surface of the first lower concave portion 471 is flush with the bottom surface of the second lower concave portion 481. That is, the top surface of the first depressed part 471 and the top surface of the first partition rib 47 are in transitional connection through an inclined surface, the top surface of the second depressed part 481 and the top surface of the second partition rib 48 are in transitional connection through an inclined surface, the inclined surface makes the transition of the connection between the first partition rib 47 and the first depressed part 471 smooth and not easy to break, and the connection between the second partition rib 48 and the second depressed part 481 smooth and not easy to break, thereby improving the strength of the first partition rib 47 and the second partition rib 48.

In other examples, the crossing angle of the first and second partition ribs 47 and 48 is not limited to 90 degrees, and the first and second partition ribs 47 and 48 may be disposed end to end on the second via 42.

Specifically, the first spacing ribs 47 and the second spacing ribs 48 are connected and then arranged on the second via holes 42 in a V shape, a first lower concave portion 471 is arranged at the central position of the first spacing ribs 47 in an extending manner towards two sides, a second lower concave portion 481 is arranged at the central position of the second spacing ribs 48 in an extending manner towards two sides, and the first lower concave portion 471 and the second lower concave portion 481 leave enough turning space for the turning sheet 3 to turn.

In other examples, the first and second partition ribs 47 and 48 respectively include a plurality of first and second partition ribs 47 and 48 arranged end to end on the second via hole 42.

Specifically, the first spacing ribs 47 and the second spacing ribs 48 are connected and then arranged on the second via holes 42 in a W shape, and the first spacing ribs 47 and the second spacing ribs 48 further improve the strength of the negative electrode lower plastic 4 at the second via holes 42, so that the negative electrode lower plastic 4 is not easy to deform or break in the collision or movement process.

Alternatively, the center of the first partition ribs 47 is provided with first depressions 471 extending to both sides, and the center of the second partition ribs 48 is provided with second depressions 481 extending to both sides.

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. 5, 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.

Alternatively, as shown in fig. 5, the second fitting projection 12 is provided with a third fitting hole 121. The top of the positive post 5a protrudes from the third fitting hole 121. That is, the positive post 5a may protrude from the second fitting projection 12 through the third fitting hole 121.

Optionally, the positive post 5a is inserted into the third assembling hole 121, and the positive post 5a does not shake during the movement of the top cover assembly 100.

Optionally, as shown in fig. 1, a third via hole 61 and a fourth via hole 62 are formed in the lower positive plastic 6, the top of the positive post 5a sequentially extends from the third via hole 61 and the third assembling hole 121, the bottom of the positive post 5a extends from 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 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. 4, 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 away from the positive electrode lower plastic 6 is provided with a first clamping member 44 extending downward, and one end of the positive electrode lower plastic 6 away from the negative electrode lower plastic 4 is provided with a second clamping member 64 extending downward. The battery top cover assembly 100 further comprises a support 7, and 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 are respectively arranged at two ends of the support 7. 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. 3, a first insertion hole 46 is formed between the second protrusion 45 and the side wall of the negative electrode lower plastic 4, and as shown in fig. 1, a first insertion portion 73 that is inserted and matched with the first insertion hole 46 is provided 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. 4, a second insertion hole 66 is formed between the third protrusion 65 and the side wall of the cathode lower plastic 6, and as shown in fig. 1, a second insertion portion 74 that is inserted and matched with the second insertion hole 66 is provided 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.

Optionally, the liquid injection valve is completely embedded in the fourth assembly hole 13, at this time, the liquid injection valve can play a role in blocking the fourth assembly hole 13, the electrolyte inside the power battery 200 cannot leak out from the fourth assembly hole 13, and external impurities cannot enter the inside of the power battery 200 to damage the battery core 220, so that the sealing performance of the battery top cover assembly 100 is improved.

Alternatively, as shown in fig. 1, the middle portion of the top cover sheet 1 is provided with a fifth assembly hole 14, and the battery top cover assembly 100 further includes an explosion-proof plate 8a, and the explosion-proof plate 8a is installed in the fifth assembly hole 14. The explosion-proof sheet 8a 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.

Optionally, as shown in fig. 1, the explosion-proof sheet 8a is engraved with groove marks, the groove marks may be arranged in various shapes, and the groove marks reduce the thickness of the explosion-proof sheet 8a, thereby facilitating the rapid explosion of the explosion-proof sheet 8a and improving the safety of the power battery 200.

Optionally, as shown in fig. 1, the battery top cap assembly 100 further includes an explosion-proof sheet protective film 8 b. The explosion-proof sheet protective film 8b is arranged above the explosion-proof sheet 8a and attached to the explosion-proof sheet 8a, once the pressure inside the power battery 200 exceeds a preset value, the explosion-proof sheet 8a bursts and is broken under the action of the pressure, pressure gas is released through the fifth assembly hole 14, and the burst explosion-proof sheet 8a is buffered by the explosion-proof sheet protective film 8b, so that secondary damage caused by sputtering on the adjacent power battery 200 is avoided.

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.

According to the utility model discloses a power battery 200, as shown in fig. 5, 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 structures of the battery top cover assembly 100 and the power battery 200 according to the specific embodiments of the present invention are described below 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, the battery top cap assembly 100 comprising: top cover plate 1, negative pole post 2a, upset piece 3 and plastic 4 under the negative pole.

As shown in fig. 5, a first assembling protrusion 11 is provided on the top cover plate 1, and a first assembling hole 111 and a second assembling hole 112 are provided on the first assembling protrusion 11.

The flip-chip 3 is connected to the second fitting hole 112, and as shown in fig. 2, the flip-chip 3 is provided with a downward first protrusion 31.

The negative electrode lower plastic 4 is fitted in the first fitting projection 11.

As shown in fig. 3, 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, at least one first partition rib 47 is disposed on the second via hole 42, the first partition rib 47 is blocked at the second via hole 42, and a first downward concave portion 471 is disposed on the first partition rib 47 corresponding to the first protrusion 31.

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.

Example 2

A battery top cover assembly 100, which is different from embodiment 1, in that on the basis of embodiment 1, as shown in fig. 3, a second spacing rib 48 is further provided on the second through hole 42, the second spacing rib 48 is arranged at the second through hole 42 in a crossing manner with the first spacing rib 47, and a second lower recess 481 is provided on the second spacing rib 48 at a position opposite to the first protrusion 31.

The crossing centers of the first and second partition ribs 47 and 48 are located at the geometric centers of the second via holes 42, the first lower recesses 471 are symmetrical with respect to the crossing centers, and the second lower recesses 481 are symmetrical with respect to the crossing centers.

The first and second partition ribs 47 and 48 intersect at an angle of 90 degrees, the end surfaces of the first and second lower recesses 471 and 481 are inclined, and the bottom surface of the first lower recess 471 is flush with the bottom surface of the second lower recess 481.

Example 3

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. 5, 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 4

A battery top cover assembly 100 is different from embodiment 3 in that, on the basis of embodiment 3, 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.

Example 5

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

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

As shown in fig. 6, the battery top cap assembly 100 is mounted to the upper portion of the outer case 210.

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.

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.

The principles of operation and benefits of other components of the battery top cap assembly 100 according to embodiments of the present invention, such as the charge valve, are known to those of ordinary skill 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 (10)

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 and provided with a downward first bulge;

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, at least one first spacing rib is arranged on the second via hole, the first spacing rib is blocked at the second via hole, and a first lower concave part is formed in the first spacing rib corresponding to the first protrusion;

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 battery top cap assembly of claim 1, wherein the second through hole further comprises at least one second spacer rib, the second spacer rib is disposed at the second through hole and intersects the first spacer rib, and the second spacer rib is provided with a second lower recess at a position facing the first protrusion.

3. The battery top cap assembly of claim 2, wherein the second through hole has first and second intersecting spacer ribs, the first and second intersecting spacer ribs having intersecting centers located at the geometric center of the second through hole, the first lower recess being symmetrical with respect to the intersecting center, and the second lower recess being symmetrical with respect to the intersecting center.

4. The battery top cap assembly of claim 3, wherein the first spacing ribs and the second spacing ribs intersect at an angle of 90 degrees, wherein the end surfaces of the first and second lower recesses are beveled, and wherein the bottom surface of the first lower recess is flush with the bottom surface of the second lower recess.

5. 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.

6. The battery top cap assembly according to claim 5, wherein a first matching flange is arranged at the bottom of the lower negative plastic in a protruding manner, the first matching 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 matching flange, the bottom wall of the first connecting plate is flush with the first matching flange, and the first connecting pole extends out of 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.

7. The battery top cover assembly according to claim 5, 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 piece 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 piece 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 piece in a clamping manner and a second buckle connected with the second clamping piece in a clamping manner.

8. The battery top cap assembly of claim 7, wherein a side of the negative electrode lower plastic adjacent to the positive electrode lower plastic extends 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.

9. The battery top cover assembly of claim 8, wherein the top cover piece is provided with a fourth assembly hole near the third assembly hole, the top cover piece is provided with a fifth assembly hole in the middle, the battery top cover assembly further comprises an explosion-proof sheet and a liquid injection valve, and the explosion-proof sheet is installed in the fifth assembly hole; be close to under the positive pole on the plastic the third arch is equipped with the fifth via hole, it is spacing to be in to annotate the liquid valve in the fourth pilot hole, just the bottom of annotating the liquid valve is followed the fifth hole of crossing passes.

10. A power cell, comprising:

a battery top cap assembly according to any one of claims 1-9, comprising a positive post and the negative post;

the upper part of the shell is provided with the battery top cover assembly;

the battery cell is arranged in the shell and is respectively electrically connected with the positive pole column and the negative pole column.

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