CN220324665U - Battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery device. The battery device includes: the battery pack comprises a plurality of batteries which are sequentially arranged, and the arrangement direction of the plurality of batteries forms a first direction; the battery is provided with a pressure relief structure, the acquisition wire harness is positioned on one side of the battery where the pressure relief structure is arranged, and the acquisition wire harness covers the pressure relief structure at the orthographic projection part of the battery; the collection pencil with the range direction of group battery forms the second direction, the second direction is perpendicular the first direction, and follows the second direction, cover the pressure release structure the part collection pencil with have the clearance between the pressure release structure. The battery device can meet the pressure release requirement of the battery and the signal acquisition requirement of the acquisition wire harness, so that the safety performance and the structural performance of the battery device are improved.

Description

Battery device

Technical Field

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

Background

In the existing battery device, the acquisition wire harness is located on one side of the battery pack, and the acquisition wire harness covers the surface of the battery, so that structural stability is guaranteed. Notably, there is a pressure relief requirement due to the battery in thermal runaway. If the pressure relief structure on the surface of the battery is completely blocked, thermal runaway of the battery can occur, which causes safety risks. Based on this, in the battery device provided in the prior art, the collection harness is formed with a through hole to form a pressure release passage. However, under the limited space condition, the structural design of the through holes formed in the acquisition harness leads to the fact that the acquisition harness tends to reduce the space for arranging the lines, so that the acquisition harness cannot acquire low-voltage signals for more batteries.

Disclosure of Invention

The utility model provides a battery device which can meet the pressure release requirement of a battery and the signal acquisition requirement of an acquisition wire harness so as to improve the safety performance and the structural performance of the battery device.

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 device comprising: the battery pack comprises a plurality of batteries which are sequentially arranged, and the arrangement direction of the plurality of batteries forms a first direction; the battery is provided with a pressure relief structure, the acquisition wire harness is positioned on one side of the battery where the pressure relief structure is arranged, and the acquisition wire harness covers the pressure relief structure at the orthographic projection part of the battery; the collection pencil with the range direction of group battery forms the second direction, the second direction is perpendicular the first direction, and follows the second direction, cover the pressure release structure the part collection pencil with have the clearance between the pressure release structure.

It should be noted that, the battery device that this application provided utilizes the clearance between collection pencil and the relief structure as the exhaust space, can be under the prerequisite that does not destroy the collection pencil, carries out effective pressure release to the spray from the relief structure spun. Moreover, because gather the pencil in this application and be complete structure, so gather the pencil internal circuit and can arrange enough according to the demand to satisfy the signal transmission demand, promote the acquisition capacity of gathering the pencil to the signal in the battery, thereby promote the structural property and the security performance of the battery device that this application provided.

Drawings

For a better understanding of the present application, 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 application. 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 structural diagram of a battery device according to an embodiment of the present disclosure;

fig. 2 is a perspective view of the collection harness of fig. 1;

fig. 3 is a schematic view of a second structure of the battery device according to the embodiment of the present application;

FIG. 4 is a schematic view of the structure of the collection harness of FIG. 2 on the side facing the battery;

fig. 5 is an enlarged schematic view at M in fig. 2.

The reference numerals are explained as follows:

100. a battery; 110. a housing; 120. a pressure relief structure; 130. an electrode assembly; 200. collecting a wire harness; 210. a flexible harness acquisition board; 220. a signal acquisition terminal; 221. a voltage acquisition terminal; 222. a temperature acquisition terminal; 230. a lead-out end; 300. an elastic support; 310. a first support; 320. a second support; 400. a reinforcing plate; 500. an auxiliary fixing plate; A. an overlap region.

Detailed Description

The technical solutions in the exemplary embodiments of the present application will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present application. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present application, 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 application.

In the description of the present application, 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 terms in the present application can be understood by those skilled in the art according to the specific circumstances.

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

The embodiment of the application provides a battery device. Fig. 1 is a schematic structural diagram of a battery device according to an embodiment of the present disclosure; fig. 2 is a perspective view of the collection harness 200 of fig. 1; fig. 3 is a schematic view of a second structure of the battery device according to the embodiment of the present application; fig. 4 is a schematic view of the structure of the collection harness 200 of fig. 2 on the side facing the battery 100; fig. 5 is an enlarged schematic view at M in fig. 2.

Referring to the structure shown in fig. 1 to 5, the battery device provided in the embodiment of the present application includes a battery pack including a plurality of sequentially arranged batteries 100, and an acquisition harness 200, an arrangement direction of the plurality of batteries 100 forming a first direction; the battery 100 is provided with a pressure relief structure 120, the acquisition wire harness 200 is positioned on one side of the battery 100 where the pressure relief structure 120 is arranged, and the pressure relief structure 120 is covered by the acquisition wire harness 200 at the orthographic projection part of the battery 100; the arrangement direction of the collection wire harness 200 and the battery pack forms a second direction, the second direction is perpendicular to the first direction, and a gap is formed between the collection wire harness 200 and the pressure relief structure 120 along the second direction, which covers part of the pressure relief structure 120. It should be appreciated that the number of battery packs within the battery device may be one or more, each battery pack corresponding to a set of collection wiring harnesses 200; the plurality of batteries 100 in the battery pack are arranged along the first direction, and since the collection harness 200 needs to collect a plurality of batteries 100 in the battery pack, the collection harness 200 extends along the first direction as shown in fig. 2; in fig. 1, in order to facilitate illustrating the gap between the collection harness 200 and the pressure release structure 120, the size of the gap is increased, and is not limited to this in particular arrangement.

Specifically, in the embodiment of the present application, the collection harness 200 and the pressure relief structure 120 are disposed on the same side of the battery 100. When thermal runaway occurs in the battery 100, phenomena such as expansion, gas generation, and the like may occur inside the battery 100. When the gas pressure in the battery 100 reaches a certain level, the high-temperature and high-pressure spray in the battery 100 will be ejected from the pressure release structure 120; after the sprayed object is sprayed out of the pressure relief structure 120, the sprayed object can be discharged from a gap between the collection wire harness 200 and the pressure relief structure 120.

It should be noted that, in the battery device provided in this embodiment of the present application, the gap between the collection wire harness 200 and the pressure release structure 120 is used as the exhaust space, so that the sprayed object sprayed from the pressure release structure 120 can be effectively released without damaging the collection wire harness 200. It is worth noting that, in the embodiment of the present application, the collection wire harness 200 is of a complete structure, so that the lines in the collection wire harness 200 can be arranged sufficiently according to the requirements, so as to meet the signal transmission requirements, and the collection capability of the collection wire harness 200 on the signals in the battery 100 is improved, so that the structural performance and the safety performance of the battery device provided in the embodiment of the present application are improved.

In one embodiment, the collection harness 200 includes a plurality of flexible harness collection plates 210, at least two flexible harness collection plates 210 are stacked along the arrangement direction (i.e., the second direction) of the collection harness 200 and the battery 100, and an overlapping area a is provided between the stacked flexible harness collection plates 210, and the overlapping area a covers at least part of the pressure relief structure 120 in the orthographic projection of the battery 100; and in the second direction, the overlapping areas a have a spacing. It should be understood that "multiple" refers to at least two, and by way of example, the number of flexible harness acquisition plates 210 within the acquisition harness 200 may be two, three, four, etc., wherein at least two flexible harness acquisition plates 210 are stacked, with an overlap area a. Taking two flexible harness acquisition plates 210 forming an overlapping area a as an example, the front projection of each flexible harness acquisition plate 210 in the overlapping area a overlaps with the front projection of the other flexible harness acquisition plate 210 in the overlapping area a.

It should be noted that, in the embodiment, the overlapping area a corresponds to at least part of the pressure release structure 120, when the high-temperature and high-pressure spray in the battery 100 is sprayed out from the pressure release structure 120, the spray can diffuse from the gap between the collection wire harness 200 and the pressure release structure 120, and part of the spray can diffuse from the gap in the overlapping area a from the collection wire harness 200 toward the battery 100 side to the collection wire harness 200 side facing away from the battery 100 side, so as to accelerate the diffusion speed of the spray, thereby improving the safety performance of the battery device.

In general, in this embodiment, the gap between the collection harness 200 and the pressure release structure 120 forms a diffusion channel for the spray, and at the same time, the interval between the collection harness 200 in the overlapping area a forms an auxiliary pressure release channel, and the auxiliary pressure release channel is communicated with the pressure release channel, so as to accelerate the diffusion speed of the spray and improve the safety performance of the battery device.

It should be noted that, in the present embodiment, the number of the flexible harness collecting boards 210 in the collecting harness 200 is increased, so that the collecting points of the collecting harness 200 can be increased, and at this time, the number of the batteries 100 in the battery pack can also be increased to improve the energy density, thereby improving the structural performance of the battery device.

Illustratively, as shown in fig. 1, taking an example in which the collection wire harness 200 includes two flexible wire harness collection plates 210, in the second direction, the two flexible wire harness collection plates 210 are stacked, but not in contact, to form a space in the stacking direction of the two. It should be understood that the size of the space between the flexible harness acquisition boards 210 is increased in fig. 1 for convenience of illustration, and is not limited thereto in particular arrangement. When this interval is specifically set, its size can be set according to the demand, however, care should be taken that this interval cannot be too large, so as to avoid that the plurality of flexible harness collecting plates 210 occupy too much space in the stacking direction, affecting the space utilization of the battery device. Of course, the interval cannot be too small, so as to avoid that the pressure release channel formed by the interval is too small, and the sprayed objects cannot be effectively sprayed out.

In one embodiment, flexible harness acquisition board 210 is a harness acquisition board having flexibility.

It should be noted that, when the flexible harness collecting board 210 is adopted, the space in the box body for placing the battery pack can be effectively utilized, so that the flexible harness collecting board 210 is connected with the battery 100, so as to reduce the overall assembly difficulty.

In a specific embodiment, the flexible harness acquisition board 210 may be an FPC (flexible printed circuit, flexible circuit board), or an FFC (flexible flat cable ). Of course, the flexible harness collecting board 210 may be other flexible structures with signal transmission function, and may be specifically set according to requirements, which will not be described herein.

It should be noted that the surface of the flexible harness collecting board 210 has an insulation structure, and when a plurality of flexible harness collecting boards 210 are stacked, the insulation structure can effectively exert an insulation effect, and avoid short circuit, so as to improve structural performance.

In one embodiment, the size of the overlap area a is greater than 0 and the size of the overlap area a is less than or equal to three-quarters of the largest width flexible harness acquisition plate 210 of the two flexible harness acquisition plates 210 forming the overlap area a along a third direction perpendicular to the first direction and the second direction.

It should be noted that, when the plurality of flexible harness collecting boards 210 in the collecting harness 200 are stacked, the occupied space of the plurality of flexible harness collecting boards 210 in the horizontal direction (i.e., the first direction and/or the third direction) can be reduced, so as to improve the space utilization of the battery device in the direction. Meanwhile, as shown in fig. 1, since the jet ejected from the pressure release structure 120 (along the arrow direction) needs to be transferred through the interval in the overlapping area a, the size of the overlapping area a in the third direction cannot be excessively large, so that the exhaust path is controlled in a proper range, the pressure release and exhaust effects are ensured, and the structural performance of the battery device is improved.

When specifically provided, the dimensions of the two flexible harness acquisition plates 210 forming the overlap region a may be the same or different in the third direction. In a particular embodiment, the two flexible harness acquisition plates 210 forming the overlap region a are different in size in the third direction. At this time, the width of one flexible harness collecting plate 210 in the third direction is large, the width of the other flexible harness collecting plate 210 in the third direction is small, and the size of the overlap area a in the third direction needs to be three quarters or less of the width of the flexible harness collecting plate 210 which is large.

Notably, in this particular embodiment, in the third direction, the smaller width flexible harness acquisition plate 210 may be offset overlapping with the larger width flexible harness acquisition plate 210; alternatively, the flexible harness collecting plate 210 with a smaller width may be completely stacked on one side of the flexible harness collecting plate 210 with a larger width, which will not be described in detail.

In another particular embodiment, the widths of the two flexible harness acquisition plates 210 forming the overlap region a are the same along the third direction. At this time, the size of the overlapping area a in the third direction may be three quarters or less of the width of any flexible harness acquisition board 210.

With continued reference to the structure shown in fig. 1, taking an example in which the collection wire harness 200 includes two flexible wire harness collection plates 210, the flexible wire harness collection plates 210 may be regular elongated, or the flexible wire harness collection plates 210 may be substantially elongated with deformation in a partial region. Accordingly, in the first direction, the size d of the overlapping area a of the two flexible harness collecting plates 210 at any position may be set to satisfy the above-described range, or the size d of the overlapping area a of the two flexible harness collecting plates 210 at a portion may be set to satisfy the above-described range.

Please continue to refer to the structure illustrated in fig. 2, in this embodiment, the collection wire harness 200 further includes a signal collection terminal 220, and the signal collection terminal 220 is connected to the flexible wire harness collection board 210, which may, for example, set the signal collection terminal 220 at a portion outside the overlapping area a, so as to avoid the overlapping area a, so that adjacent flexible wire harness collection boards 210 are overlapped, so as to reduce the assembly difficulty. Of course, the setting position of the signal acquisition terminal 220 can also avoid the pressure release structure 120, so as to ensure that the signal acquisition terminal 220 can always and effectively acquire the information of the battery 100, and avoid that the signal acquisition terminal 220 is damaged by the jet from the pressure release structure 120 during pressure release, so as to improve the structural performance and the safety performance of the battery device.

For example, please continue to refer to the structure shown in fig. 2, in the present embodiment, the signal acquisition terminal 220 includes a voltage acquisition terminal 221 and a temperature acquisition terminal 222, wherein the temperature acquisition terminal 222 is used for detecting the temperature of the battery 100 so as to facilitate the control system to monitor the temperature state of the battery 100, and the voltage acquisition terminal 221 is used for acquiring the voltage signal of the battery 100 so as to facilitate the control system to monitor the temperature state of the battery 100.

In one embodiment, the temperature acquisition terminal 222 is an NTC (negative temperature coefficient ).

The NTC means a thermistor structure having a negative temperature coefficient in which the resistance decreases exponentially with the temperature rise.

In one embodiment, the voltage acquisition terminal 221 is a nickel plate.

Of course, the voltage collecting terminal 221 may have other structures, which are not described herein.

In one embodiment, two flexible harness acquisition plates 210 forming an overlap region a are secured within the overlap region a by a dispensing interval.

It should be noted that, the dispensing can play a certain role in fixing and improving structural stability, but can not completely block the pressure release channel, so that the sprayed objects from the pressure release structure 120 can be effectively discharged into the box body, and the structural performance and safety performance of the battery device are improved.

In one embodiment, referring to the structure shown in fig. 3 and 4, the collection harness 200 is provided with an elastic support 300 on the side facing the battery 100, and the front projection of the elastic support 300 on the battery 100 does not overlap with the pressure release structure 120.

It should be noted that, in this embodiment, the elastic support 300 is used to connect the flexible harness collecting board 210 and the battery pack, and plays a role of supporting and buffering, so that it needs to contact the flexible harness collecting board 210 and the battery 100, if the pressure release structure 120 is pressed, the gap between the flexible harness collecting board 210 and the pressure release structure 120 is reduced, and the ejection effect is affected.

In a specific embodiment, referring to the structure shown in fig. 3 and 4, the elastic support 300 includes a first support portion and a second support portion, and the first support portion and the second support portion are located on opposite sides of the collection harness 200 along a third direction perpendicular to the first direction and the second direction.

It should be noted that, in this embodiment, along the third direction, the first supporting portion and the second supporting portion lift the collection wire harness 200 from a plurality of positions, so as to ensure the stability of the collection wire harness 200 on the surface of the battery 100, thereby improving the collection effect of the collection wire harness 200 and further improving the safety performance of the battery device.

It is noted that in the first direction, the flexible harness acquisition plate 210 may be supported with the elastic support 300 between each of the cells 100 in the battery pack to promote stability, or the flexible harness acquisition plate 210 may be supported with some of the cells 100 with the elastic support 300 to enlarge the pressure relief channel.

In a specific embodiment, with continued reference to the structure illustrated in fig. 4, the first support portion and/or the second support portion includes a plurality of sub-portions spaced apart along the first direction.

It should be noted that, along the length direction of the flexible harness collecting board 210, adjacent sub-portions in the first supporting portion and the second supporting portion have a distance, and the distance is communicated with a gap between the collecting harness 200 and the pressure release structure 120, so that the sprayed objects can be guided out from the position between the flexible harness collecting board 210 and the battery 100 to the inside of the box body, thereby accelerating the exhaust rate of the sprayed objects, and improving the safety performance of the battery device.

When the elastic support 300 is specifically provided, the elastic support 300 may be foam or dispensing.

In one implementation, please continue to refer to the structure shown in fig. 1 and 3, the battery 100 includes a case 110 and an electrode assembly 130, wherein the electrode assembly 130 includes a positive electrode assembly 130 and a negative electrode assembly 130, and in this embodiment, the positive electrode assembly 130 and the negative electrode assembly 130 may be led out from the same side of the case 110 and are disposed at intervals therebetween. Accordingly, the pressure relief structure 120 may be disposed between the two electrode assemblies 130 to reasonably utilize the internal space.

In a specific embodiment, the battery device provided in the embodiments of the present application further includes a case, the battery pack is disposed inside the case, and the pressure release structure 120 is disposed on a side of the bottom plate of the battery 100 facing away from the case.

It is noted that, if the side of each structural member close to the bottom plate of the case is defined as "bottom", the side of each structural member facing away from the bottom plate of the case is defined as "top". Accordingly, in the embodiment of the application, the pressure release structure 120 is disposed at the top of the battery 100, and the collection wire harness 200 is disposed at the top of the battery 100, and a gap is formed between the bottom surface of the collection wire harness 200 and the top surface of the pressure release structure 120.

It should be noted that this configuration may facilitate other configurations in the bottom space of battery 100. For example, a heat exchange assembly may be disposed at the bottom of the battery 100 to exchange heat with the battery 100, thereby further improving the structural performance and safety performance of the battery device.

In one implementation, in the first direction, the end of each flexible harness acquisition board 210 is provided with a terminal 230, the terminal 230 being used to enable connection of the flexible harness acquisition board 210 to external control elements in the acquisition harness 200. As shown in fig. 2 and 5, the lead-out terminal 230 is fixed to the reinforcing plate 400; the reinforcing plates 400 connected to the plurality of flexible harness collecting plates 210 in the collecting harness 200 are sequentially arranged in a third direction perpendicular to the first direction and the second direction.

It should be noted that, in the present embodiment, the outlet 230 of each flexible harness collecting board 210 is separately provided with a reinforcing plate 400, so as to enhance structural stability at the outlet 230, and facilitate the connection of the outlet 230 with an external control element. In addition, in the present embodiment, the reinforcing plates 400 of the plurality of flexible harness collecting plates 210 are arranged along the third direction and are located substantially in the same horizontal plane, so as to reduce the assembly difficulty, and facilitate each of the leading-out ends 230 to be reinforced individually.

In one embodiment, the battery device provided in the embodiment of the present application further includes an auxiliary fixing plate 500, and the plurality of reinforcing plates 400 connected to the collection wire harness 200 are fixed to the same side of the auxiliary fixing plate 500. It should be appreciated that the auxiliary fixing plate 500 also functions as a reinforcing plate 400 to enhance structural stability of the plurality of flexible harness collecting plates 210 corresponding to the outlet 230.

It should be noted that, in this embodiment, the plurality of output ends are set to the same position by using a longer auxiliary fixing plate 500, so as to facilitate the assembly operation in the subsequent operation, and reduce the assembly difficulty. Meanwhile, when a single flexible wire harness collecting plate 210 is produced, the flexible wire harness collecting plate can be connected with only one reinforcing plate 400, so that the production efficiency is improved, when a plurality of flexible wire harness collecting plates 210 are required to be shared, the auxiliary fixing plate 500 is utilized to connect the leading-out ends 230 (which are fixed on the surface of the reinforcing plate 400) of the plurality of flexible wire harness collecting plates 210 together, and the adaptability and the flexibility are improved.

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

Claims (10)

1. A battery device, characterized by comprising: the battery pack comprises a plurality of batteries which are sequentially arranged, and the arrangement direction of the plurality of batteries forms a first direction; the battery is provided with a pressure relief structure, the acquisition wire harness is positioned on one side of the battery where the pressure relief structure is arranged, and the acquisition wire harness covers the pressure relief structure at the orthographic projection part of the battery; the collection pencil with the range direction of group battery forms the second direction, the second direction is perpendicular the first direction, and follows the second direction, cover the pressure release structure the part collection pencil with have the clearance between the pressure release structure.

2. The battery device of claim 1, wherein the collection harness includes a plurality of flexible harness collection plates, at least two of the flexible harness collection plates are stacked along an alignment direction of the collection harness and the battery, the stacked flexible harness collection plates have an overlap region therebetween, the overlap region covers at least a portion of the pressure relief structure in an orthographic projection of the battery, and the overlap region has a spacing along the second direction.

3. The battery device of claim 2, wherein the size of the overlap area is greater than 0 and the size of the overlap area is less than or equal to three-quarters of the largest width of the two flexible harness acquisition plates forming the overlap area in a third direction perpendicular to the first direction and the second direction.

4. The battery device of claim 3, wherein the widths of the two flexible harness acquisition plates forming the overlap region are the same along the third direction.

5. The battery device of claim 2, wherein two of said flexible harness acquisition plates forming said overlap region are secured within said overlap region by dispensing intervals.

6. The battery device of claim 1, wherein the collection harness is provided with a resilient support on a side facing the battery, the resilient support not overlapping the pressure relief structure in an orthographic projection of the battery.

7. The battery device of claim 6, wherein the support member includes a first support portion and a second support portion, the first support portion and the second support portion being located on opposite sides of the collection harness in a third direction perpendicular to the first direction and the second direction.

8. The battery device of claim 7, wherein the first support portion and/or the second support portion includes a plurality of sub-portions disposed at intervals along the first direction.

9. The battery device of any one of claims 6-8, wherein the resilient support is foam or spot-glued.

10. The battery device of any one of claims 2-5, wherein in the first direction, an end of each of the flexible harness collection plates is provided with a lead-out end, the lead-out end being fixed to a reinforcing plate; the reinforcing plates connected with the flexible wire harness collecting plates in the collecting wire harness are sequentially arranged along a third direction perpendicular to the first direction and the second direction;

the battery device further comprises an auxiliary fixing plate, and the plurality of reinforcing plates connected with the acquisition wire harness are fixed on the same side of the auxiliary fixing plate.