CN219226491U

CN219226491U - Battery pack

Info

Publication number: CN219226491U
Application number: CN202320082299.4U
Authority: CN
Inventors: 赵冬; 沈玉阳
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2023-01-12
Filing date: 2023-01-12
Publication date: 2023-06-20
Anticipated expiration: 2033-01-12

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack. The battery pack comprises a box body, a battery bracket and a battery; wherein the case may include a heat exchange plate; the battery support is arranged in the box body; the battery is arranged on the battery bracket, and a through hole exposing the battery is arranged on one side of the battery bracket facing the heat exchange plate, so that the battery is connected with the heat exchange plate through heat conducting glue; wherein, be provided with the excessive glue portion on the battery support, the heat conduction is glued and can flow to between battery and the heat exchanger plate through the excessive glue portion. According to the battery pack, the thickness of the heat conducting adhesive layer can be reduced by arranging the adhesive overflowing part on the battery support, so that the distance between the heat exchange plate and the battery can be reduced, and the heat dissipation capacity of the battery can be improved.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

In the related art, the battery of the battery pack is arranged in the box body, and the battery in the box body is cooled through the cooling plate, so that the safe use performance of the battery is ensured. However, due to structural limitations between the cooling plate and the battery, there may be a problem in that the adhesive layer between the cooling plate and the battery is thick, thereby affecting heat dissipation of the battery.

Disclosure of Invention

The utility model provides a battery pack to improve the service performance of the battery pack.

The present utility model provides a battery pack, comprising:

the box body comprises a heat exchange plate;

the battery bracket is arranged in the box body;

the battery is arranged on the battery bracket, and a through hole exposing the battery is arranged on one side of the battery bracket facing the heat exchange plate, so that the battery is connected with the heat exchange plate through heat conducting glue;

wherein, be provided with the excessive glue portion on the battery support, the heat conduction is glued and can flow to between battery and the heat exchanger plate through the excessive glue portion.

The battery pack provided by the disclosure, on the one hand, through set up the overflow portion on the battery support, can make when pouring into the heat conduction glue to the through-hole, can guarantee that the heat conduction glue that does not directly pour on the battery surface also can flow to between battery and the heat exchange plate through overflow portion to the heat conduction glue that does not directly pour on the battery surface also can not be detained in the battery support one side towards the heat exchange plate, thereby can not form the heat conduction glue film that has certain thickness on the battery support, just also can reduce the thickness of the heat conduction glue between battery and the cold plate. Therefore, when the heat exchange plate is connected with the battery, the heat exchange plate can be close to the battery bracket as much as possible, so that the distance between the heat exchange plate and the battery can be reduced, the heat resistance between the heat exchange plate and the battery is reduced, and the heat dissipation capacity of the battery can be improved.

On the other hand, the heat-conducting glue which is not directly poured on the surface of the battery can flow between the battery and the heat exchange plate through the glue overflow part, so that the waste of the heat-conducting glue can be reduced, and the manufacturing cost of the battery pack can be saved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic view illustrating a structure of a battery pack according to an exemplary embodiment;

fig. 2 is a partial schematic structure of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

10. a case; 11. a heat exchange plate; 20. a battery holder; 21. a through hole; 22. an inclined plane; 23. a plane; 24. an overflow trough; 30. and a battery.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

One embodiment of the present disclosure provides a battery pack, as shown in fig. 1 to 2, including a case 10, a battery holder 20, and a battery 30; wherein the case 10 may include a heat exchange plate 11; the battery bracket 20 is arranged in the box body 10; the battery 30 is arranged on the battery bracket 20, and a through hole 21 exposing the battery 30 is arranged on one side of the battery bracket 20 facing the heat exchange plate 11, so that the battery 30 is connected with the heat exchange plate 11 through heat-conducting glue; wherein, be provided with the excessive glue portion on the battery support 20, the heat conduction glue can flow to between battery 30 and the heat exchanger plate 11 through the excessive glue portion.

The battery pack provided by the disclosure, on the one hand, through set up the overflow portion on battery support 20, can make when pouring into the heat conduction glue to through-hole 21, can guarantee that the heat conduction glue that does not directly pour on battery 30 surface also can flow to between battery 30 and the heat exchanger plate 11 through the overflow portion to the heat conduction glue that does not directly pour on battery 30 surface also can not be detained in battery support 20 towards the one side of heat exchanger plate 11, thereby can not form the heat conduction glue film that has certain thickness on battery support 20, just also can reduce the thickness of the heat conduction glue between battery 30 and the cold plate. Therefore, when the heat exchange plate 11 is connected with the battery 30, the heat exchange plate 11 can be as close to the battery holder 20 as possible, so that the distance between the heat exchange plate 11 and the battery 30 can be reduced to reduce the thermal resistance between the heat exchange plate 11 and the battery 30, thereby improving the heat dissipation capacity of the battery 30.

On the other hand, the heat-conducting glue which is not directly poured on the surface of the battery 30 can flow between the battery 30 and the heat exchange plate 11 through the glue overflow part, so that the waste of the heat-conducting glue can be reduced, and the manufacturing cost of the battery pack can be saved.

The battery pack is exemplified below.

Referring to fig. 1, a battery pack may include a case 10. The case 10 may include a bottom surface, protective covers, and side plates. The bottom surface and the protective cover can be rectangular, four side plates are arranged around the bottom surface, the four side plates are connected end to form a rectangular ring, the protective cover is arranged on the other side of the four side plates, and the protective cover is arranged opposite to the bottom surface. The bottom surface, the protective cover and the four side plates surround to form an accommodating space.

Of course, in other example embodiments of the present disclosure, the bottom surface and the protective cover may be provided in a circular shape, an elliptical shape, a trapezoid shape, etc., and the side plates may be provided in one or more and formed around the circular shape, the elliptical shape, the trapezoid shape, etc., such that the case 10 is formed in a cylindrical shape, an elliptical cylindrical shape, a prismatic shape, etc. The case 10 may have other shapes, and will not be described in detail herein.

In the present exemplary embodiment, the case 10 may include a heat exchange plate 11, and the heat exchange plate 11 may be connected with the battery 30 inside the case 10 through a heat conductive adhesive. Channels can be arranged in the heat exchange plates 11, heat exchange media can be introduced into the channels, and heat emitted by the batteries 30 in the box 10 can be exchanged with heat of the heat exchange media through the arrangement of the heat exchange media. Namely: when the battery 30 in the box 10 needs to be cooled, a heat exchange medium with a lower temperature can be introduced into the heat exchange plate 11 to dissipate heat of the battery 30 in the box 10.

In other example embodiments of the present disclosure, the heat exchange plate 11 may form a bottom surface of the case 10, that is: the bottom surface of the case 10 itself may be the heat exchange plate 11. It will be appreciated that channels are provided in the bottom surface of the housing 10 and that a heat exchange medium may be provided in the channels in the bottom surface. In this way, in the present embodiment, as compared with the previous embodiment, since there is no need to separately add one heat exchange plate 11 in the case 10, the thickness of the bottom surface can be effectively reduced, and the weight of the case 10 can be effectively reduced. Alternatively, the heat exchange plate 11 may form the top surface of the case 10, and for example, the protective cover may be the heat exchange plate 11.

In this example embodiment, the heat exchange medium may be a phase change material, such as: water, acetic acid, and the like. However, the heat exchange medium is not limited thereto, and may be other materials, so long as heat exchange can be achieved, and details are not described here.

The battery pack may also include a battery holder 20 and a battery 30. Wherein, battery support 20 can set up in box 10, and battery 30 can set up on battery support 20, can support battery 30 through battery support 20. The battery holder 20 may be disposed around the outer circumferential surface of the battery 30 to protect the battery 30 from damage due to collision of the battery 30 with other structures. The side of the battery holder 20 facing the heat exchange plate 11 may be provided with a through hole 21 exposing the battery 30, and a heat conductive adhesive may be poured into the through hole 21 to connect the battery 30 with the heat exchange plate 11 through the heat conductive adhesive, so that heat of the battery 30 and the heat exchange plate 11 may be exchanged through the heat conductive adhesive, thereby achieving heat dissipation of the battery 30.

In the present exemplary embodiment, a side of the battery holder 20 facing the heat exchange plate 11 may be provided with a plurality of through holes 21, and the plurality of through holes 21 may be disposed at intervals along the length direction of the battery holder 20. Each through hole 21 can be filled with heat conducting glue, so that the battery 30 can exchange heat with the heat exchange plate 11 through the heat conducting glue in the through holes 21, thereby increasing the heat dissipation area of the battery 30 and improving the heat dissipation capacity of the battery 30.

In one embodiment, the plurality of through holes 21 may be uniformly arranged along the length direction of the battery holder 20, so that the heat dissipation of the battery 30 may be more uniform, and the performance of the battery pack may be improved.

However, when the heat conductive adhesive is injected into the through hole 21, the heat conductive adhesive not directly injected into the surface of the battery 30 may remain on the side of the battery holder 20 facing the heat exchange plate 11, thereby forming a heat exchange adhesive layer having a certain thickness on the side of the battery holder 20 facing the heat exchange plate 11, thereby increasing the thickness of the heat conductive adhesive between the heat exchange plate 11 and the battery 30. When the heat exchange plate 11 is connected with the battery 30, the distance between the heat exchange plate 11 and the battery 30 is larger, and the thermal resistance is larger, so that the heat dissipation capacity of the battery 30 is lower.

To solve this technical problem, in the present exemplary embodiment, a flash portion may be provided on the battery holder 20, through which the heat conductive paste may flow between the battery 30 and the heat exchange plate 11.

Through set up the excessive glue portion on battery support 20, can make when pouring into the heat conduction glue to through-hole 21, can guarantee that not directly pour into the heat conduction glue on battery 30 surface and also can flow to between battery 30 and the heat exchanger plate 11 through the excessive glue portion to not directly pour into the heat conduction glue on battery 30 surface and also can not detain in battery support 20 towards the one side of heat exchanger plate 11, thereby can not form the heat conduction glue film that has certain thickness on battery support 20, just also can reduce the thickness of the heat conduction glue between battery 30 and the cold plate. Therefore, when the heat exchange plate 11 is connected with the battery 30, the heat exchange plate 11 can be as close to the battery holder 20 as possible, so that the distance between the heat exchange plate 11 and the battery 30 can be reduced to reduce the thermal resistance between the heat exchange plate 11 and the battery 30, thereby improving the heat dissipation capacity of the battery 30.

Meanwhile, the heat-conducting glue which is not directly poured on the surface of the battery 30 can flow between the battery 30 and the heat exchange plate 11 through the glue overflow part, so that the waste of the heat-conducting glue can be reduced, and the manufacturing cost of the battery pack can be saved.

In the present exemplary embodiment, at least part of the flash portion is disposed on the surface of the battery holder 20 facing the heat exchange plate 11, so that when the heat conductive glue is poured, the heat conductive glue poured on the surface of the battery holder 20 facing the upper heat exchange plate 11 can be directly introduced into the through hole 21 from the surface, whereby the flash efficiency of the flash portion can be improved.

In one embodiment, referring to fig. 2, the glue overflow portion may include a slope 22, and the slope 22 may form a wall of the through hole 21. After the hole wall of the through hole 21 is set to the inclined surface 22, the hole diameter of the through hole 21 gradually increases from the end of the inclined surface 22 close to the battery 30 to the end of the inclined surface 22 away from the battery 30. Thus, when pouring the heat-conducting glue into the through-hole 21, the inclined surface 22 may serve to guide the heat-conducting glue, so that the heat-conducting glue poured on the surface of the battery holder 20 facing the heat exchanger plate 11 may be guided directly into the through-hole 21 by the inclined surface 22. The angle between the inclined surface 22 and the surface of the battery 30 may be an obtuse angle to ensure the best flow guiding effect of the inclined surface 22.

The wall of the through hole 21 may also be provided with a straight surface, which may be located at one end of the inclined surface 22 near the surface of the battery 30 and extend in a direction near the surface of the battery 30. Through setting up the straight face, can guarantee that the space of through-hole 21 can not shrink because of setting up inclined plane 22 undersize to this can guarantee when guaranteeing that the pore wall has the water conservancy diversion function, can increase the area that battery 30 and heat exchanger plate 11 are connected as far as, in order to guarantee that battery 30 can have stronger heat dispersion.

In one embodiment, the surface of the battery holder 20 facing the heat exchanger plate 11 may comprise a flat surface 23 connected with the inclined surface 22. The flat surface 23 may be in contact with the heat exchanger plate 11. By arranging the plane 23, compared with the situation that the surfaces of the battery support 20 facing the heat exchange plate 11 are all inclined surfaces 22, the plane 23 can change the contact between the heat exchange plate 11 and the surface of the battery support 20 facing the heat exchange plate 11 from line contact to surface contact, so that the pressure between the heat exchange plate 11 and the surface of the battery support 20 facing the heat exchange plate 11 can be greatly reduced, the heat exchange plate 11 or the battery support 20 is prevented from being damaged due to overlarge contact pressure, and the service life of the battery pack can be further prolonged.

The area of the plane 23 is not larger than the area of the orthographic projection of the inclined surface 22 toward the heat exchange plate 11, so that the area of the surface of the battery holder 20 toward the heat exchange plate 11 can be reduced and the area of the inclined surface 22 can be increased. By this arrangement, the amount of heat conductive adhesive poured on the surface of the battery holder 20 facing the heat exchange plate 11 can be reduced as much as possible when the heat conductive adhesive is poured. And, cooperate the water conservancy diversion function of inclined plane 22 again, can guarantee as far as possible that battery support 20 can not remain the heat conduction glue on the surface towards heat exchange plate 11 to this clearance that can make between heat exchange plate 11 and the battery support 20 is as far as possible zero, thereby can further reduce the heat conduction glue thickness between heat exchange plate 11 and the battery 30, further promote the heat dispersion of battery 30.

In other example embodiments of the present disclosure, the glue overflow portion may include an overflow groove 24, and the overflow groove 24 may communicate with the through hole 21. When the heat-conducting glue is poured, the heat-conducting glue which is not directly poured on the surface of the battery 30 can be directly guided into the through hole 21 through the overflow groove 24.

In one embodiment, the overflow channel 24 may be located on the surface of the battery holder 20 facing the heat exchanger plate 11, i.e.: a recess may be hollowed out in the surface of the battery holder 20 facing the heat exchanger plate 11, and one end of the recess may be in communication with the through hole 21, and the recess may be the above-mentioned overflow groove 24.

In another embodiment, the overflow channel 24 may extend through the cell support 20 in a direction perpendicular to the heat exchanger plate 11. Specifically, one end of the overflow groove 24 may be disposed at a surface of the battery holder 20 facing the heat exchange plate 11, the other end of the overflow groove 24 may extend in a direction perpendicular to the heat exchange plate 11 and finally penetrate the battery holder 20, and the other end of the overflow groove 24 may be directly communicated with the through hole 21 after penetrating the battery holder 20. When the heat-conducting glue is poured, the overflow groove 24 can guide the heat-conducting glue which is not directly poured on the surface of the battery 30 into the through hole 21 directly along the direction perpendicular to the heat exchange plate 11.

In one embodiment, a plurality of overflow channels 24 may be provided, and a plurality of overflow channels 24 may be provided at intervals on the battery support 20, so that overflow capacity and overflow efficiency of the overflow channels 24 may be improved.

The material of the battery holder 20 may be plastic, so that the weight of the battery holder 20, that is, the weight of the battery pack, can be reduced as much as possible while ensuring that the battery 30 directly has sufficient structural strength. However, the battery holder 20 is not limited thereto, and other materials having insulation properties may be used, and a detailed description thereof will not be given here.

The battery 30 may include a battery housing, a battery cell, and an electrolyte, which may be disposed within the battery housing.

The above-described battery 30 is a minimum unit capable of performing electrochemical reactions such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack portion including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode are interchangeable.

In the present exemplary embodiment, the battery 30 may be a laminated battery, not only is the battery group convenient, but also the battery 30 having a long length may be manufactured.

Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Alternatively, the battery 30 may be a wound battery 30, i.e., a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, the battery 30 may have a large surface and a small surface disposed around the large surface. When the battery 30 is a rectangular battery, the battery 30 may have two oppositely disposed large surfaces and four small surfaces disposed around the large surfaces, and the four small surfaces may include two pairs of small surfaces, i.e., a first pair of small surfaces extending in the length direction of the battery 30 and a second pair of small surfaces extending in the width direction of the battery 30.

The large surface of the battery 30 may be regarded as the surface where the heat generated by the battery 30 is the greatest, and further, the large surface of the battery 30 may be the surface where the area of the battery 30 is the greatest.

In the present exemplary embodiment, referring to fig. 1, the number of the battery 30 may be plural, and the stacking direction of the plurality of the battery 30 may be perpendicular to the large surface of the battery 30, whereby the energy storage capacity of the battery pack and the energy density of the battery pack may be improved.

When the battery 30 is provided in plurality, the battery holder 20 may be provided in plurality, and each battery 30 may be provided in the case 10 by the corresponding battery holder 20. By the arrangement, each battery 30 can be supported by one battery support 20, and the corresponding battery 30 can be protected by each battery support 20, so that the battery 30 is prevented from being damaged due to collision between two adjacent batteries 30 or collision between the battery 30 and other structures of the battery pack.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery pack, comprising:

the box body (10), the box body (10) includes the heat exchange plate (11);

a battery bracket (20), wherein the battery bracket (20) is arranged in the box body (10);

the battery (30), the said battery (30) is set up on the said battery support (20), the said battery support (20) is provided with the through hole (21) exposing the said battery (30) towards one side of the said heat exchanger plate (11), in order to make the said battery (30) connect with said heat exchanger plate (11) through the heat-conducting glue;

the battery bracket (20) is provided with a glue overflow part, and the heat conduction glue can flow between the battery (30) and the heat exchange plate (11) through the glue overflow part.

2. The battery pack according to claim 1, wherein at least part of the glue overflow is provided on a surface of the battery holder (20) facing the heat exchange plate (11).

3. The battery pack according to claim 2, wherein the glue overflow portion includes a slope (22), the slope (22) forming a wall of the through hole (21).

4. A battery pack according to claim 3, characterized in that the surface of the battery holder (20) facing the heat exchanger plate (11) comprises a plane (23) connected to the bevel (22), which plane (23) is in direct contact with the heat exchanger plate (11).

5. The battery pack according to claim 4, wherein the area of the flat surface (23) is not larger than the area of the orthographic projection of the inclined surface (22) toward the heat exchange plate (11).

6. The battery pack according to any one of claims 2 to 5, wherein the glue overflow portion includes an overflow groove (24), the overflow groove (24) being in communication with the through hole (21).

7. The battery pack according to claim 6, wherein the overflow groove (24) penetrates the battery holder (20) in a direction perpendicular to the heat exchange plate (11).

8. The battery pack according to claim 1, wherein the through holes (21) are plural, and the plural through holes (21) are provided at intervals along the longitudinal direction of the battery holder (20).

9. The battery pack according to claim 1, wherein the plurality of the cells (30) is provided, and a stacking direction of the plurality of the cells (30) is perpendicular to a large surface of the cells (30).

10. The battery pack according to claim 9, wherein the battery holders (20) are plural, and each of the batteries (30) is disposed in the case (10) through the corresponding battery holder (20).

11. The battery pack according to claim 1, wherein the heat exchange plate (11) forms a bottom surface of the case (10), or wherein the heat exchange plate (11) forms a top surface of the case (10).