CN221102236U - Battery cover plate structure and battery - Google Patents

Abstract

The utility model discloses a battery cover plate structure and a battery, comprising: the cover plate body comprises an exposed surface and an assembly surface corresponding to the exposed surface; the lower plastic is connected with the assembly surface, a through hole is formed in the lower plastic in a penetrating mode, and a butt groove is formed in a space between the wall of the through hole and the assembly surface; and one end of the heat conducting sheet is at least partially positioned in the abutting groove and is in fit connection with the assembly surface, so that the heat conducting sheet is perpendicular to the cover plate body. The utility model can realize the heat transfer in the battery core, and the heat can be quickly transferred to the cover plate body aluminum sheet at the top of the battery core, thereby reducing the temperature in the battery core, prolonging the service life of the battery core and reducing the safety accidents such as explosion of the battery core.

Description

Battery cover plate structure and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cover plate structure and a battery.

Background

In the prior art, two core packages are respectively welded on a cover plate, then the two core packages are combined, an inner protective film is attached to the outer surface of the two core packages, a bottom support sheet is placed on the lower surface of the two core packages, short circuit caused by direct contact between a winding core and an aluminum shell is prevented, and then the two core packages are placed in the aluminum shell for welding, and electrolyte is injected to form the battery. Because the battery pack formed by the prior battery can generate heat in the high-power charge and discharge process, and the middle point of the two core packs is poor in heat dissipation, the battery continuously generates heat in the use process, when the heat dissipation is poor, the service life of the battery core is reduced when the heat dissipation is light, and the battery core is expanded and exploded when the heat dissipation is heavy.

Disclosure of utility model

In order to overcome at least one of the above-mentioned drawbacks of the prior art, the present utility model provides a battery cover structure and a battery. The heat transfer inside the battery cell can be realized, and the heat can be quickly transferred to the cover plate body aluminum sheet at the top of the battery cell, so that the temperature inside the battery cell is reduced, the service life of the battery cell is prolonged, and safety accidents such as explosion of the battery cell are reduced.

The utility model adopts the technical proposal for solving the problems that:

A battery cover plate structure comprising: the cover plate body comprises an exposed surface and an assembly surface corresponding to the exposed surface; the lower plastic is connected with the assembly surface, a through hole is formed in the lower plastic in a penetrating mode, and a butt groove is formed in a space between the wall of the through hole and the assembly surface; and one end of the heat conducting sheet is at least partially positioned in the abutting groove and is in fit connection with the assembly surface, so that the heat conducting sheet is perpendicular to the cover plate body.

Through adopting above-mentioned scheme, can make the conducting strip assemble to the butt inslot in, with the laminating of fitting surface, can direct transfer heat to with the heat transfer of conducting strip to the apron body, realize radiating the conducting strip with electric core contact.

Further, one end of the heat conducting fin comprises a protruding structure and an abutting edge, the protruding structure is formed by the heat conducting fin extending outwards, the protruding structure is bent to form a bending part, the bending part is assembled in the abutting groove and abuts against the assembling surface, and the abutting edge abuts against one side of the lower plastic, far away from the cover plate body.

Through adopting above-mentioned scheme, through assembling kink and butt groove, realize the fixed mounting effect of conducting strip, can directly heat transfer with the fitting surface laminating simultaneously, realize the radiating effect.

Further, a clamping groove along the length direction of the cover plate body is formed in one side, far away from the cover plate body, of the lower plastic, and the clamping groove is clamped with the abutting edge; or the end part of the abutting edge is bent and provided with a clamping plane, one of the clamping planes is provided with a positioning hole, and the other positioning piece is fixed on the lower plastic through the clamping fit of the positioning hole and the positioning piece.

Through adopting above-mentioned scheme, through setting up draw-in groove or location structure, can improve the assembly stability of conducting strip.

Further, along the length direction of the cover plate body, a plurality of clamping planes are arranged at intervals, and the bending directions of two adjacent clamping planes are opposite.

By adopting the scheme, the connection stability between the heat conducting fin and the lower plastic is improved.

Further, the distance from the abutting edge to the bending part is smaller than or equal to the thickness of the lower plastic, and/or the area of the bending part is consistent with the area of the through hole of the lower plastic.

By adopting the scheme, when the distance from the abutting edge to the bending part is equal to the thickness of the lower plastic, the abutting edge abuts against the lower plastic and is not inserted into the lower plastic; when the distance from the abutting edge to the bending part is smaller than the thickness of the lower plastic, the abutting edge is inserted into the lower plastic and is clamped with the clamping groove of the lower plastic; make the kink can with butt groove adaptation installation, improve assembly roughness and stability.

Further, the maximum length of the bending part in the width direction of the cover plate body is not greater than the width of the cover plate body.

Through adopting above-mentioned scheme, can avoid kink area to be greater than the width of apron body, lead to apron body and battery case unable problem of assembling.

Further, the exposed surface of the cover plate body further comprises a positive electrode post, a negative electrode post and an explosion-proof valve, and the abutting groove of the assembly surface is positioned between the negative electrode post and the explosion-proof valve.

Through adopting above-mentioned scheme, can avoid negative pole utmost point post and explosion-proof valve setting, other functions normal operating of battery is not influenced.

Further, the maximum length of the bending part of the heat conducting fin along the length direction of the cover plate body is smaller than the distance between the negative electrode pole and the explosion-proof valve.

By adopting the scheme, the interference of the assembly of the heat conducting fin on the normal operation of the negative electrode pole and the explosion-proof valve is avoided.

The battery comprises a battery shell with one end open, two or more than two battery cores and a battery cover plate structure, wherein the battery cores are positioned in the battery shell, the battery cover plate assembly covers the opening of the battery shell, the number of the battery cores is defined as N, the number of the heat conducting fins is at least N-1, and one heat conducting fin is clamped between two adjacent battery cores.

Through adopting above-mentioned scheme, can set up the conducting strip between two electric cores, can balance the temperature between the electric core, realize soaking to can also be with the heat transfer between the electric core to the apron body at top on, then dispel the heat through the light aluminum sheet of apron body self, greatly reduced the inside temperature of electric core, the life of extension electric core reduces the electric core because the high probability that arouses the explosion of temperature.

Further, the area of the heat conducting fin is not larger than the area of the clamping surface between the two battery cores.

By adopting the scheme, the inconvenience of assembly caused by overlarge area of the heat conducting fin and contact with the inner wall of the battery shell is avoided.

In summary, the battery cover plate structure and the battery provided by the utility model have the following technical effects:

1. The heat conducting fin capable of conducting heat is assembled on the cover plate body, so that the temperature between the two battery cells can be transmitted outwards, the heat transfer effect is realized, and the heat dissipation effect in the battery cells is improved;

2. Through setting up the butt groove on lower plastic, make the conducting strip can be connected to the butt inslot tightly, simultaneously with the assembly face butt of apron body, improve the assembly stability of conducting strip.

Drawings

Fig. 1 is a schematic perspective view of a battery cover plate according to an embodiment of the utility model;

FIG. 2 is a schematic side view of a battery cover plate according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the assembled surface of a battery cover plate according to an embodiment of the present utility model;

Fig. 4 is a schematic view showing a partial sectional structure of a battery according to an embodiment of the present utility model;

Fig. 5 is an enlarged view of region a of fig. 4.

Wherein the reference numerals have the following meanings: 1. a cover plate body; 11. an exposed surface; 111. a positive electrode post; 112. a liquid injection hole; 113. an explosion-proof valve; 114. a negative electrode post; 12. a mounting surface; 2. lower plastic; 21. an abutment groove; 22. a clamping groove; 3. a heat conductive sheet; 31. a protruding structure; 311. a bending part; 32. abutting the edge; 4. a battery cell; 5. and a battery case.

Detailed Description

For a better understanding and implementation, the technical solutions of the embodiments of the present utility model will be clearly and completely described and discussed below in conjunction with the accompanying drawings, and it is apparent that what is described herein is only a part, but not all, of the examples of the present utility model, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

For the purpose of facilitating an understanding of the embodiments of the present utility model, reference will now be made to the drawings, by way of example, of specific embodiments, and the various embodiments should not be construed to limit the embodiments of the utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Embodiment 1 of the present utility model is shown in fig. 1 to 5, and discloses a battery cover plate structure, which comprises a cover plate body 1, a lower plastic 2 and a heat conducting fin 3, wherein the cover plate body 1 comprises an exposed surface 11 and an assembly surface 12 corresponding to the exposed surface 11, the exposed surface 11 is sequentially provided with a positive electrode post 111, a liquid injection hole 112, an explosion-proof valve 113 and a negative electrode post 114 from one side to the other side, the lower plastic 2 is arranged on the assembly surface 12 of the cover plate body 1, the lower plastic 2 is penetrated and provided with a through hole, a space between a hole wall of the through hole and the assembly surface forms an abutting groove 21, the shape of the through hole comprises but is not limited to rectangular, circular, elliptic or diamond, in the embodiment 1, the through hole is rectangular, and the assembly surface 12 of the cover plate body 1 is exposed in the through hole. One end of the heat conducting fin 3 is at least partially located in the abutting groove 21 and is in abutting connection with the assembling surface 12, so that the heat conducting fin 3 is perpendicular to the cover plate body 1, when the heat conducting fin 3 is assembled in the abutting groove 21, the heat conducting fin 3 is in abutting connection with the assembling surface 12, heat can be directly transferred, and therefore heat of the heat conducting fin 3 is transferred to the cover plate body 1, and heat dissipation of the heat conducting fin 3 in contact with an electric core is achieved.

Specifically, one end of the heat conducting strip 3 includes a protruding structure 31 and an abutment rib 32, the protruding structure 31 is formed by extending the heat conducting strip 3 outwards, the protruding structure 31 is partially bent to form a bending portion 311, the bending angle is 90 °, the bending portion 311 can be assembled in the abutment groove 21 and abuts against the assembling surface 12, and therefore the bending portion 311 is configured to be consistent with the area of the through hole and the shape is the same. The connection mode between the bending part 311 and the abutting groove 21 comprises one or more of clamping, bonding and welding, so that the heat conducting fin 3 can be firmly connected with the cover plate body 1, the abutting edge 32 abuts against one side of the lower plastic 2 far away from the cover plate body 1, the bending part 311 is assembled with the abutting groove 21, the fixed installation effect of the heat conducting fin 3 is achieved, meanwhile, the heat conducting fin can be directly conducted through the joint of the heat conducting fin and the assembling surface 12, and the heat dissipation effect is achieved.

In an embodiment, in order to improve the connection stability between the lower plastic 2 and the bending portion 311, a clamping groove 22 is formed on one side, away from the cover plate body 1, of the lower plastic 2, and the clamping groove 22 is clamped with the abutting edge 32 along the length direction of the cover plate body 1, and by setting the clamping groove 22, the assembly stability of the heat conducting strip 3 can be improved, and the heat conducting strip is prevented from rotating left and right by taking the bending portion 311 as a circle center. At this time, the distance from the contact edge 32 to the bending portion 311 is smaller than the thickness of the lower plastic 2, and the contact edge 32 is inserted into the lower plastic 2 from the clamping groove 22, so that the edge of the protruding portion of the heat conducting plate is inserted into the lower plastic 2 to be clamped with the clamping groove 22 of the lower plastic 2, thereby improving the assembly effect of the two.

In one embodiment, in order to reduce the processing steps of the lower plastic 2, the clamping groove 22 is not provided on the lower plastic 2, so the abutment rib 32 directly abuts against a side surface of the lower plastic 2 away from the cover plate body 1 and is not inserted into the lower plastic 2, and at this time, the distance from the abutment rib 32 to the bending portion 311 is equal to the thickness of the lower plastic 2.

In some embodiments, the end of the abutting edge 32 is bent and provided with a clamping plane, one of the clamping planes is provided with a positioning hole, the other positioning piece is provided in the lower plastic 2, the abutting edge 32 is fixed on the lower plastic 2 through the clamping fit of the positioning hole and the positioning piece, a plurality of abutting edges are arranged at intervals along the length direction of the cover plate body, the bending directions of two adjacent abutting planes are opposite, and the connection stability between the heat conducting fin and the lower plastic can be improved through setting positioning structures such as the positioning hole and the positioning piece, at the moment, the distance from the abutting edge 32 to the bending part 311 is equal to the thickness of the lower plastic 2.

In some embodiments, the area of the bending portion 311 may be smaller than the area of the through hole of the lower plastic 2, so that the bending portion 311 can be assembled inside the abutting groove 21, and then fixed by glue filling or other manners, and the redundant portion of the abutting groove 21 can be used for accommodating the redundant fixing objects such as the redundant glue, so as to improve the assembly flatness and stability.

It should be noted that, in the above embodiment, the maximum length of the bending portion 311 along the width direction of the cover body 1 is not greater than the width of the cover body 1, so that the problem that the area of the bending portion 311 is greater than the width of the cover body 1, and the cover body 1 and the battery case 5 cannot be assembled can be avoided. The maximum length of the bending part 311 of the heat conducting fin 3 along the length direction of the cover plate body 1 is smaller than the distance between the negative electrode pole 114 and the explosion-proof valve 113, and by adopting the scheme, the interference of the assembly of the heat conducting fin 3 on the normal operation of the negative electrode pole 114 and the explosion-proof valve 113 is avoided.

On the cover plate body 1, since the liquid injection hole 112 is further required to be arranged between the positive electrode pole 111 and the explosion-proof valve 113, the part with the largest blank area on the cover plate body 1 is the position between the negative electrode pole 114 and the explosion-proof valve 113, so that the abutting groove 21 and the bending part 311 are arranged between the negative electrode pole 114 and the explosion-proof valve 113, the largest contact area with the cover plate body 1 can be achieved while the negative electrode pole 114 and the explosion-proof valve 113 are avoided, the connection stability is improved, the heat transfer area between the heat conducting sheet 3 and the cover plate body 1 is improved, and the heat dissipation of the heat conducting plate is facilitated. In other embodiments, the number of the abutting grooves 21 and the bending parts 311 may be more than two, and the abutting grooves may be disposed on two sides of the positive electrode post 111 and the negative electrode post 114 or other positions, and the present embodiment is not particularly limited.

The utility model also relates to a battery, which comprises a battery shell 5 with an opening at one end, two or more than two battery cells 4 and a battery cover plate structure, wherein the battery cells 4 are positioned in the battery shell 5, the battery cover plate assembly covers the opening of the battery shell 5, the number of the battery cells 4 is defined as N, the number of the heat conducting fins 3 is at least N-1, one heat conducting fin is clamped between two adjacent battery cells 4, the heat conducting fin 3 can be arranged between the two battery cells 4, the temperature between the battery cells 4 can be balanced, the realization of heat transfer between the battery cells 4 can be realized, and then the heat between the battery cells 4 can be transferred to the cover plate body 1 at the top, and then the heat is dissipated through the optical aluminum sheet of the cover plate body 1, so that the temperature inside the battery cells is greatly reduced, the service life of the battery cells is prolonged, and the explosion probability of the battery cells caused by overhigh temperature is reduced.

It should be noted that, the area of the heat conducting strip 3 is not greater than the area of the clamping surface between the two electric cores 4, so that the problem of inconvenient assembly caused by the overlarge area of the heat conducting strip 3 contacting with the inner wall of the battery shell 5 can be avoided.

In summary, the battery cover plate structure and the battery provided by the utility model have the following technical effects:

1. The heat conducting fin 3 capable of conducting heat is assembled on the cover plate body 1, so that the temperature between the two battery cells 4 can be transmitted outwards, the heat transfer effect is realized, and the heat dissipation effect in the battery cells is improved;

2. By arranging the abutting groove 21 on the lower plastic 2, the heat conducting fin 3 can be tightly connected into the abutting groove 21 and simultaneously abuts against the assembling surface 12 of the cover plate body 1, so that the assembling stability of the heat conducting fin 3 is improved;

3. By providing the protruding structure 31 on the heat conductive sheet 3, and the protruding structure 31 can be partially bent to form the bent portion 311 in accordance with the passing hole area, the fitting stability of the bent portion 311 and the abutment groove 21 can be improved;

4. by providing the abutting groove 21 and the bent portion 311 between the negative electrode memory and the explosion-proof valve 113, the areas of the abutting groove 21 and the bent portion 311 can be increased, thereby increasing the heat exchange area between the heat conductive plate and the cover plate body 1.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A battery cover plate structure, characterized by comprising:

The cover plate comprises a cover plate body (1), wherein the cover plate body (1) comprises an exposed surface (11) and an assembling surface (12) corresponding to the exposed surface (11);

the lower plastic (2) is connected with the assembly surface (12), the lower plastic (2) is provided with a through hole in a penetrating way, and a butt groove (21) is formed in a space between the wall of the through hole and the assembly surface (12);

And one end of the heat conducting sheet (3) is at least partially positioned in the abutting groove (21) and is in fit connection with the assembling surface (12), so that the heat conducting sheet (3) is perpendicular to the cover plate body (1).

2. The battery cover plate structure according to claim 1, wherein one end of the heat conducting fin (3) comprises a protruding structure (31) and an abutting edge (32), the protruding structure (31) is formed by extending the heat conducting fin (3) outwards, the protruding structure (31) is partially bent to form a bending part (311), the bending part (311) is assembled in the abutting groove (21) and abuts against the assembling surface (12), and the abutting edge (32) abuts against one side, far away from the cover plate body (1), of the lower plastic (2).

3. The battery cover plate structure according to claim 2, wherein a clamping groove (22) along the length direction of the cover plate body (1) is formed in one side, away from the cover plate body (1), of the lower plastic (2), and the clamping groove (22) is clamped with the abutting edge (32);

or the end part of the abutting edge (32) is bent and provided with a clamping plane, one of the clamping planes is provided with a positioning hole, the other positioning piece is arranged in the lower plastic (2), and the abutting edge (32) is fixed on the lower plastic (2) through the clamping fit of the positioning hole and the positioning piece.

4. A battery cover plate structure according to claim 3, wherein a plurality of the clamping planes are arranged at intervals along the length direction of the cover plate body (1), and the bending directions of two adjacent clamping planes are opposite.

5. A battery cover structure according to claim 2, wherein the distance from the abutment edge (32) to the bending portion (311) is less than or equal to the thickness of the lower plastic (2).

6. A battery cover structure according to claim 5, wherein the area of the bending part (311) is consistent with the area of the through hole of the lower plastic (2), and/or the maximum length of the bending part (311) in the width direction of the cover body (1) is not greater than the width of the cover body (1).

7. A battery cover structure according to any one of claims 1-6, wherein the exposed face (11) of the cover body (1) further comprises a positive electrode post (111), a negative electrode post (114) and an explosion-proof valve (113), and the abutment groove (21) is located between the negative electrode post (114) and the explosion-proof valve (113).

8. The battery cover structure according to claim 7, wherein the maximum length of the bent portion (311) of the heat conductive sheet (3) in the longitudinal direction of the cover body (1) is smaller than the distance between the negative electrode post (114) and the explosion-proof valve (113).

9. A battery, characterized in that, including one end open-ended battery casing (5), two or more electric core (4) and the battery apron structure of any one of claims 1-8, electric core (4) are located in battery casing (5), battery apron subassembly lid in the opening of battery casing (5), define the quantity of electric core (4) is N, the quantity of conducting strip (3) is at least N-1, presss from both sides between two adjacent electric core (4) and is equipped with one conducting strip (3).

10. A battery according to claim 9, characterized in that the area of the thermally conductive sheet (3) is not larger than the area of the clamping surface between two cells (4).