CN219832931U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack. The battery pack includes: the plurality of batteries and the plate body are stacked on one side of the plate body, and the extending direction of the plate body is parallel to the stacking direction of the plurality of batteries; the plate body is provided with pressure relief openings corresponding to the positions of each battery, and adjacent pressure relief openings are arranged in a staggered manner along the stacking direction of the batteries. According to the battery pack, the adjacent pressure relief openings are arranged in a staggered mode, so that the size of an overlapping area of the adjacent pressure relief openings can be reduced, the possibility that the sprayed objects penetrate through the adjacent pressure relief openings is reduced, the influence degree of the sprayed objects on the adjacent batteries during pressure relief of the batteries is further reduced, the damage of the adjacent batteries due to the fact that the sprayed objects are contacted with high temperature and high pressure is avoided, and the safety performance and the service life of the battery pack 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 existing battery pack, a pressure relief opening is formed in a position, corresponding to a battery, of a box body, after the battery is exploded, high-temperature and high-pressure spray objects can be sprayed out of the battery, and most of spray objects can enter the box body through the pressure relief opening to relieve pressure.

Because a plurality of batteries in the battery pack are stacked, a plurality of pressure relief openings in the existing box are also orderly arranged along the stacking direction of the batteries. However, the pressure relief ports arranged in order have a problem of mutual influence, and when a certain battery is expanded and ruptured, the high-temperature and high-pressure spray should be discharged from the pressure relief port corresponding to the certain battery, but because the size between the adjacent pressure relief ports is relatively close, the spray may penetrate to the adjacent pressure relief ports, and the battery corresponding to the adjacent pressure relief ports is extremely easy to be damaged.

Therefore, how to ensure the smooth pressure release of the battery and reduce the influence on the adjacent battery during the pressure release of the battery is a technical problem to be solved.

Disclosure of Invention

The utility model provides a battery pack, which can ensure that an internal battery is smoothly decompressed and can reduce the influence on adjacent batteries when the battery is decompressed.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

according to a first aspect of the present utility model, there is provided a battery pack comprising: the plurality of batteries and the plate body are stacked on one side of the plate body, and the extending direction of the plate body is parallel to the stacking direction of the plurality of batteries; the plate body is provided with pressure relief openings corresponding to the positions of each battery, and adjacent pressure relief openings are arranged in a staggered manner along the stacking direction of the batteries.

Specifically, in the battery pack provided by the utility model, each pressure relief opening on the plate body corresponds to one battery, and the pressure relief openings are sequentially arranged along the stacking direction of the batteries. If a certain battery is damaged, the sprayed objects sprayed from the inside of the battery can be sprayed to the other side from the plate body towards one side of the battery through the pressure relief opening corresponding to the sprayed objects.

The battery pack provided by the utility model has the advantages that the adjacent pressure relief openings are arranged in a staggered manner, so that the size of the overlapping area of the adjacent pressure relief openings can be reduced, the possibility that the spray penetrates the adjacent pressure relief openings is reduced, the influence degree of the spray on the adjacent battery during pressure relief of the battery is further reduced, the damage of the adjacent battery caused by the contact of the spray at high temperature and high pressure is avoided, and the safety performance and the service life of the battery pack can be improved.

Drawings

For a better understanding of the utility model, 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 utility model. 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 and schematic diagram of a three-dimensional structure of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of the structure of the plate body of FIG. 1;

fig. 3 is a schematic diagram of a second structure of a plate body in a battery pack according to an embodiment of the present utility model.

The reference numerals are explained as follows:

100. a battery; 200. a plate body; 210. and a pressure relief port.

Detailed Description

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

In the description of the present utility model, 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/" 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 above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present utility model, it should be understood that the terms "upper", "lower", "inner", "outer", and the like in the exemplary embodiments of the present utility model are described in terms of the drawings, and should not be construed as limiting the exemplary embodiments of the present utility model. 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.

Referring to fig. 1, a schematic perspective view of a battery pack according to an embodiment of the present utility model is representatively illustrated, wherein a part of the structure of the battery pack is specifically illustrated, excluding other structures such as a plate body and a battery. In this exemplary embodiment, the battery pack according to the embodiment of the present utility model is described by taking a vehicle-mounted battery pack as an example. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs provided by the embodiments of the present utility model to other types of battery packs, and such changes are still within the principles of the battery packs set forth by the embodiments of the present utility model.

As shown in fig. 1, in the embodiment of the present utility model, the battery pack provided by the embodiment of the present utility model includes a plurality of batteries 100 and a plate 200, and the plurality of batteries 100 are stacked on one side of the plate 200. FIG. 2 is a schematic illustration of the structure of the plate 200 of FIG. 1; fig. 3 is a schematic diagram showing a second structure of a plate 200 in a battery pack according to an embodiment of the present utility model. It should be noted that the structure of fig. 2 and 3 only shows the structure of the board body 200. The structure, connection manner and functional relationship of the main components in the battery pack according to the embodiment of the present utility model will be described in detail with reference to the above drawings.

As shown in fig. 1 and 2, a battery pack according to an embodiment of the present utility model includes: a plurality of cells 100 and a plate 200, the plurality of cells 100 being stacked on one side of the plate 200, and an extending direction of the plate 200 being parallel to a stacking direction of the plurality of cells 100; the plate 200 is provided with pressure relief openings 210 at positions corresponding to each of the cells 100, and adjacent pressure relief openings 210 are arranged in a staggered manner along the stacking direction of the cells 100.

Specifically, in the battery pack provided by the embodiment of the utility model, each pressure relief opening 210 on the plate body 200 corresponds to one battery 100, and the plurality of pressure relief openings 210 are sequentially arranged along the stacking direction of the plurality of batteries 100. If a certain battery 100 is damaged, the sprayed objects sprayed from the inside of the battery 100 are sprayed from one side of the plate 200 to the other side of the battery 100 through the pressure relief openings 210 corresponding to the sprayed objects.

It should be noted that, by arranging the adjacent pressure relief openings 210 in a staggered manner, the battery pack provided by the embodiment of the utility model can reduce the size of the overlapping area of the adjacent pressure relief openings 210, reduce the possibility that the sprayed objects penetrate through the adjacent pressure relief openings 210, further reduce the influence degree of the sprayed objects on the adjacent battery 100 when the battery 100 is depressurized, and avoid the damage of the adjacent battery 100 caused by the sprayed objects contacting with high temperature and high pressure, thereby improving the safety performance and the service life of the battery pack.

It should be noted that, in order to facilitate understanding of the battery pack provided in the embodiments of the present utility model, exemplary, provision is made for: the stacking direction of the plurality of cells 100 is parallel to the first direction, the arrangement direction of the cells 100 and the plate 200 is parallel to the second direction, and the second direction is perpendicular to the first direction. In addition, the battery pack has a third direction perpendicular to both the first direction and the second direction.

As shown in fig. 1, the long side extending direction of the board 200 is parallel to the first direction, and the short side extending direction of the board 200 is parallel to the third direction. The plurality of cells 100 form one cell row after being stacked in the first direction. It should be understood that the number of the battery rows disposed at one side of the plate body 200 may be one or more, and when a plurality of battery rows may be arranged in the first direction and/or the third direction, the plate body 200 may be formed with a plurality of pressure relief vents 210 as shown in fig. 1 to 3 at regions corresponding to each of the batteries 100. Of course, the arrangement of the plurality of pressure relief ports 210 corresponding to each battery row may be the same or different, and may be specifically set according to the requirement, which is not described herein.

It should be understood that "misplacement" is literally off-site or in-place. As with the configuration shown in fig. 1, there is a misalignment between adjacent relief ports 210 in a third direction. When a certain cell 100 is ruptured by expansion, the adjacent pressure relief ports 210 are displaced in the third direction, so that the overlapping dimension of the adjacent pressure relief ports 210 is reduced, and the possibility that high-temperature and high-pressure jet penetrates through the adjacent pressure relief ports 210 is greatly reduced. The staggered structure arrangement can ensure that the sprayed objects are discharged from the pressure relief openings 210 corresponding to the sprayed objects to the greatest extent, so that the influence degree on the adjacent batteries 100 during pressure relief of the batteries 100 is reduced, and the safety performance and the service life of the battery pack are improved.

In one embodiment, please continue with the structure shown in fig. 1 and 2, along the stacking direction (parallel to the first direction) of the plurality of batteries 100, the plurality of pressure relief vents 210 on the plate 200 include pressure relief vents 210 located at odd positions and pressure relief vents 210 located at even positions, wherein: the pressure relief ports 210 located at the odd positions are arranged in the same manner; and/or, the pressure relief ports 210 located at even numbers are arranged in the same pattern.

It should be understood that the "arrangement form" refers to the arrangement position in the third direction and the size, shape, etc. of the relief port 210. Of course, the shape of the pressure relief opening 210 is not limited to the rectangle shown in fig. 1 and 2, but may be a circle or the like according to the requirement, and may be specifically set according to the requirement, which is not described herein.

Specifically, as shown in fig. 2, the plurality of pressure relief vents 210 are arranged along the first direction to correspond to the plurality of batteries 100 arranged along the first direction. For a plurality of relief ports 210 arranged in a first direction, it can be identified in turn with 1, 2, 3, 4, 5, 6, … …, provided that the reference numerals begin from one side.

It should be noted that, in the specific arrangement of the pressure relief port 210 on the board 200, it may be that: the arrangement positions of the pressure relief ports 210 in the odd number positions in the third direction are the same, namely, the positions of the pressure relief ports 210 in the third direction of reference numerals 1, 3, 5 and … … are the same; also, it is possible to set up: the placement positions of the respective pressure relief ports 210 in the third direction are the same at even positions, i.e., the positions of the pressure relief ports 210 in the third direction are the same at reference numerals 2, 4, 6 … …. It should be noted that, this setting form can reduce the preparation degree of difficulty, when adopting punching press or other technology to form pressure release mouth 210, can unify punching press odd number position and/or even number position's pressure release mouth 210 on plate body 200, avoid punching press each pressure release mouth 210 alone to promote preparation efficiency, reduce manufacturing cost.

In one embodiment, with continued reference to the structures shown in fig. 1 and 2, the size of the relief ports 210 in the even positions is the same as the size of the relief ports 210 in the odd positions.

In this embodiment, the pressure relief ports 210 at each position have the same size. The structure can reduce the preparation difficulty and improve the preparation efficiency on one hand; on the other hand, the pressure relief function of the plate 200 corresponding to each battery 100 can be guaranteed to be consistent, so that the same pressure relief effect can be exerted, each battery 100 can be effectively relieved at the corresponding pressure relief opening 210, and the safety performance of the battery pack can be further improved.

When the pressure relief ports 210 on the plate body 200 are specifically disposed, the dislocation state between the adjacent pressure relief ports 210 may be set according to the requirement, specifically at least one of the following structural forms.

In one embodiment, with continued reference to the structure shown in fig. 2, in the stacking direction (i.e., the first direction) of the plurality of cells 100, the pressure relief vents 210 located at even positions overlap at least partially with the pressure relief vents 210 located at odd positions.

It should be noted that, in the structure shown in fig. 2, the relief ports 210 located at even positions overlap with the relief ports 210 located at odd positions, i.e., the arrow indication portions in fig. 2. It should be appreciated that the size of each pressure relief opening 210 in the third direction is not limited by this structural arrangement, and under the premise that the overlapping size is not greater than the preset value, the pressure relief openings 210 at the odd positions and the pressure relief openings 210 at the even positions can extend to both sides, so as to set and form the size of the pressure relief opening 210 meeting the requirement according to the requirement, ensure the pressure relief effect of the pressure relief opening 210 on the battery 100, and further improve the safety performance of the battery pack.

In one embodiment, the width of the pressure relief vent 210 is smaller than the width of the corresponding battery 100 in the stacking direction of the plurality of batteries 100.

It should be noted that, if the size of the pressure relief openings 210 is too large, the structural strength of the board 200 is affected, and the arrangement design of the structures of the pressure relief openings 210 is affected; if the size of the pressure relief opening 210 is too small, the pressure relief effect is affected, so that the spray cannot be effectively discharged from the pressure relief opening 210. In this embodiment, by setting the size of the pressure relief opening 210 to be smaller than the width of the battery 100, the pressure relief effect of the pressure relief opening 210 can be ensured without damaging the structural strength of the plate 200.

In one embodiment, the length of the pressure relief vent 210 is half the length of the battery 100.

Likewise, if the size of the pressure relief opening 210 is too large, the structural strength of the board 200 is affected; if the size of the pressure relief opening 210 is too small, the pressure relief effect is affected, so that the spray cannot be effectively discharged from the pressure relief opening 210. In this embodiment, by setting the length of the pressure relief opening 210 to be half of the length of the battery 100, the pressure relief effect of the pressure relief opening 210 can be ensured to be better without damaging the structural strength of the plate 200.

In one embodiment, with continued reference to the structure shown in fig. 3, in the stacking direction (first direction) of the plurality of cells 100, the pressure relief vent 210 located at the even position and the pressure relief vent 210 located at the odd position do not overlap at all.

It should be noted that, in the structure shown in fig. 3, the relief ports 210 located at the even number positions do not overlap with the relief ports 210 located at the odd number positions. It should be appreciated that the structure is provided such that the adjacent pressure relief openings 210 are completely pulled apart in the third direction, so that the influence degree of the pressure relief of the battery 100 on the adjacent battery 100 can be further reduced, and damage to the adjacent battery 100 caused by high-temperature and high-pressure injection is avoided, so that the safety performance and the service life of the battery pack can be better improved.

In a specific embodiment, as shown in fig. 3, in the third direction, the relief ports 210 located at even positions and the relief ports 210 located at odd positions have a distance L on one side near each other, and the distance L is greater than 0.

Furthermore, it is noted that the spacing between adjacent relief vents 210 in the first direction depends on the structural arrangement between two cells 100 and the thickness of the cells 100. For example, if a heat insulation pad is further disposed between two adjacent batteries 100, the thickness of the heat insulation pad and the thickness of the batteries 100 together affect the size of the interval, which is not described in detail.

In one embodiment, the plate body 200 is a base plate or a heat exchange plate. Illustratively, the heat exchange plate is a cold plate, and the heat exchange medium filled in the heat exchange plate is a cooling liquid.

Specifically, the heat exchange plate can exchange heat with the battery 100, so that heat at the battery 100 is timely led out, the running state of the battery 100 is optimized, and the safety performance of the battery pack is improved.

It will be appreciated that the heat exchange plate may be in heat exchanging contact with the bottom of the cell 100 via a glue layer. In a specific embodiment, the adhesive layer is a heat-conducting adhesive, which has good heat-conducting property and can improve the heat exchange effect between the heat exchange plate and the battery 100.

In addition, it should be noted that, when the plate body 200 is a heat exchange plate, when the pressure relief openings 210 are in a completely staggered arrangement in fig. 3, the flow channels in the heat exchange plate can be conveniently arranged, so as to reduce the difficulty in preparation, and meanwhile, the heat exchange effect of the heat exchange plate on the battery 100 can be improved.

In one embodiment, the battery 100 is provided with a weak portion on a side facing the plate body 200; the relief vent 210 is opposite the frangible portion. Specifically, when the pressure of the gas in the battery 100 reaches a certain value, the part of the gas is sprayed out of the weak portion of the battery 100 to release the pressure, so as to ensure the safety performance of the battery pack.

Illustratively, the weak portion may be a through hole, a thin plate or a score provided at the bottom of the case of the battery, which will not be described herein.

It should be noted that, the weak portion corresponds to the structural arrangement of the pressure relief opening 210, so as to further reduce the influence degree of the pressure relief of the battery 100 on the adjacent battery 100, and avoid the damage of the adjacent battery 100 caused by the high-temperature and high-pressure spray, thereby improving the safety performance and the service life of the battery pack.

Specifically, the high-temperature and high-pressure spray ejected from the weak portion of the battery 100 may directly enter the pressure relief port 210 corresponding thereto, be guided out into the preset region inside the case through the pressure relief port 210, and reduce the pressure in the region.

In a particular embodiment, the size of the relief vent 210 is greater than the size of the corresponding frangible portion. This structure sets up, can guarantee when battery 100 pressure release, and the spray can be discharged through pressure release mouth 210 smoothly to promote the security performance and the life of battery package better.

It should be noted that, in the battery pack provided in the embodiment of the present utility model, the plurality of batteries 100 may be selected from the same specification. For example, the same type of battery 100 may be symmetrically disposed, so that a plurality of batteries 100 may correspond to a plurality of pressure relief ports 210 disposed in a staggered manner.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the utility model being indicated by the following claims. It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims (10)

1. A battery pack, comprising: the plurality of batteries and the plate body are stacked on one side of the plate body, and the extending direction of the plate body is parallel to the stacking direction of the plurality of batteries; the plate body is provided with pressure relief openings corresponding to the positions of each battery, and adjacent pressure relief openings are arranged in a staggered manner along the stacking direction of the batteries.

2. The battery pack of claim 1, wherein the plurality of relief vents on the plate body include an odd-numbered relief vent and an even-numbered relief vent in a stacking direction of the plurality of cells, wherein:

the pressure relief openings at odd positions are identical in arrangement form; and/or the number of the groups of groups,

and the pressure relief openings positioned at even numbers are identical in arrangement form.

3. The battery pack of claim 2, wherein the size of the relief vent in even positions is the same as the size of the relief vent in odd positions.

4. The battery pack of claim 3, wherein the pressure relief vent in an even position overlaps at least part of the pressure relief vent in an odd position in a stacking direction of a plurality of the batteries.

5. The battery pack according to claim 4, wherein the width of the pressure release opening is smaller than the width of the battery corresponding thereto in the stacking direction of the plurality of batteries.

6. The battery pack of claim 5, wherein the pressure relief vent has a length that is half the length of the battery.

7. The battery pack according to claim 3, wherein the pressure relief vent in the even position and the pressure relief vent in the odd position do not overlap at all in the stacking direction of the plurality of the batteries.

8. The battery pack of any one of claims 1-7, wherein the plate body is a bottom plate or a heat exchange plate.

9. The battery pack according to claim 8, wherein the battery is provided with a weak portion on a side facing the plate body; the pressure relief vent is opposite the frangible portion.

10. The battery pack of claim 9, wherein the pressure relief vent has a size greater than a size of the corresponding frangible portion.