Battery case, battery pack and vehicle

Abstract

A battery case (100), a battery pack and a vehicle. The battery case (100) comprises a case body (110A) provided with a mounting cavity (140) and a supporting assembly (130). The mounting cavity (140) is used for mounting a plurality of battery cells (120); the case body (110A) comprises a side plate (110) defining at least part of the mounting cavity (140); and the supporting assembly (130) comprises a supporting plate (131) and an adjustment set (150) configured to adjust a gap between the supporting plate (131) and the side plate (110). The supporting plate (131) is used for abutting against one side of the plurality of battery cells (120), so that the plurality of battery cells (120) abut against the case body (110A).

Description

Battery box, battery pack and vehicle

[0001] The present application claims priority to the Chinese patent application No. 2024215298440, filed on July 01, 2024, to the Chinese Patent Office, the whole content of the above application being incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of battery, in particular to a battery box and a battery pack. BACKGROUND

[0003] The CTP (Cell-To-Pack) battery pack in the related art generally comprises a box body, a plurality of battery cells, and two fixed support members located on both sides of the plurality of battery cells, and the plurality of battery cells form a plurality of rows of battery cell groups arranged side by side. SUMMARY

[0004] Since there may be a difference in thickness between the battery cells, the length of the battery cell group may be greater than the distance between the two fixed support members, at which time an auxiliary tool is generally used to extrude the battery cell group so that it can be placed between the two fixed support members. Since the operation of the auxiliary tool is relatively complicated, the assembly efficiency of the battery cells is relatively low.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a battery box. The battery box comprises a box body provided with a mounting cavity for mounting a plurality of battery cells, the box body comprising a side plate surrounding at least part of the mounting cavity; and a support assembly comprising a support plate and an adjustment assembly configured to adjust the spacing between the support plate and the side plate; wherein the support plate is used to abut one side of the plurality of battery cells so that the plurality of battery cells abut the box body.

[0007] In a second aspect, the present application provides a battery pack. The battery pack comprises the above-mentioned battery box.

[0008] In a third aspect, the present application provides a vehicle. The vehicle comprises the above-mentioned battery pack. ADVANTAGEOUS EFFECTS

[0009] The battery box provided by the present application can conveniently adjust the support plate movably connected to the side plate to a suitable position to abut one side of the plurality of battery cells, so that the plurality of battery cells abut the box body, thereby facilitating the assembly of the plurality of battery cells, and thus the assembly efficiency of the battery cells is higher.

[0010] The battery pack provided by the present application has all the advantages of the above-mentioned battery box.

[0011] The vehicle provided by the present application has all the advantages of the above-mentioned battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0012] FIG. 1 is a structural schematic diagram of a battery box in the related art;

[0013] FIG. 2 is a structural schematic diagram of a battery box provided by an embodiment of the present application;

[0014] FIG. 3 is a sectional view of FIG. 2;

[0015] FIG. 4 is an enlarged schematic diagram of a portion A in FIG. 3;

[0016] FIG. 5 is an exploded view of a support assembly in FIG. 4;

[0017] FIG. 6 is a structural schematic diagram of a support plate abutting against a plurality of battery cells in FIG. 1;

[0018] FIG. 7 is a side view of FIG. 6;

[0019] Legend of reference signs:

[0020] 100A, battery box; 110A, box body; 120A, battery cell; 130A, fixed support; 100, battery box; 110, side plate; 120, battery cell; 130, support assembly; 131, support plate; 140, mounting cavity; 150, adjusting group; 151, first connecting plate; 152, second connecting plate; 160, fixed plate; 161, first pivot joint; 162, second pivot joint; 170, insulating member; 171, protection part; 172, limiting part. Embodiments of the present application

[0021] In the related art, please refer to FIG. 1, which is a structural schematic diagram of a battery box 100A in the related art. The battery box 100A generally comprises a box body 110A, a plurality of battery cells 120A located in the box body 110A, and fixed supports 130A located on both sides of the plurality of battery cells 120A, the fixed supports 130A being used to fix the plurality of battery cells 120A. Because the positions of the fixed supports 130A are fixed, the distance between the two fixed supports 130A is also fixed. However, due to the possible thickness difference between the plurality of battery cells 120A, the plurality of battery cells 120A located in the length direction of the box body 110A are taken as a battery cell group, and in the process of assembling the battery cells 120A, the length of a battery cell group may be greater than the distance between the two fixed supports 130A, at which time it is difficult to put the battery cell group into the battery box 100A. If the number of battery cell groups is reduced by one or more, although the battery cell group can be put into the battery box 100A at this time, because the length of the battery cell group is less than the distance between the two fixed supports 130A at this time, the fixed supports 130A cannot effectively fix the battery cell group at this time. Therefore, generally when assembling the battery cells 120A, auxiliary tooling needs to be used to extrude the plurality of battery cell groups, so that the length of each battery cell group is equal to the distance between the two fixed supports 130A, so as to put the battery cell group between the two fixed supports 130A. However, due to the use of auxiliary tooling, the assembly efficiency of the battery cells 120A is low.

[0022] In order to solve the above problem of low assembly efficiency of the battery cells, embodiments of the present application provide a battery box 100, please refer to FIG. 2 and FIG. 3, FIG. 2 is a structural schematic diagram of the battery box 100 provided by the embodiments of the present application, and FIG. 3 is a sectional view of FIG. 2. The battery box 100 comprises a box body provided with a mounting cavity 140 and a support assembly 130, the box body comprises a side plate 110 surrounding at least part of the mounting cavity 140, the mounting cavity 140 being used to mount a plurality of battery cells 120, and the support assembly 130 comprises a support plate 131 and an adjusting assembly 150 configured to adjust the spacing between the support plate and the side plate, and the support plate 131 is used to abut one side of the plurality of battery cells 120, so that the plurality of battery cells 120 are abutted and fixed to the box body. Wherein, the support plate 131 can be an elastic piece that can be stretched.

[0023] Compared with the related art, the battery box 100 provided by the embodiment does not need to extrude the plurality of battery cells 120 in each battery cell group in advance through an auxiliary tool and then place them into the box body, but directly abuts and fixes the plurality of battery cells 120 in the box body through the support plate 131 of the support assembly 130 after all the battery cells 120 are placed, so that the support plate 131 movably connected to the side plate 110 is adjusted to the appropriate position to abut one side of the plurality of battery cells 120, so that the plurality of battery cells 120 abut the box body, thereby facilitating the assembly of the plurality of battery cells. Meanwhile, the support assembly 130 occupies a smaller space in the battery box 100, so that the space available for operation is larger when the battery cells 120 are assembled, so that the assembly of the battery cells 120 is more convenient and flexible, and thus the assembly efficiency of the battery cells is higher.

[0024] In some embodiments, please refer to FIG. 3. The support assembly 130 further includes an adjusting group 150, and the support plate 131 is rotationally connected to the side plate 110 through the adjusting group 150. Wherein, before all the plurality of battery cells 120 are assembled into the mounting cavity 140, the distance between the support plate 131 connected with the adjusting group 150 and the plurality of battery cells 120 is far, at this time, the space in the mounting cavity 140 for assembling the battery cells 120 is larger, facilitating the assembly operation. When all the plurality of battery cells 120 are assembled into the mounting cavity 140, the adjusting group 150 rotates and drives the support plate 131 to gradually approach the plurality of battery cells 120 and finally abut and extrude the plurality of battery cells 120, so as to provide a fixing effect for the plurality of battery cells 120.

[0025] In some embodiments, the adjusting group 150 can be an elastic member that deforms a certain amount when subjected to an external force and returns to the initial state or approaches the initial state after the external force is removed. The elastic member is arranged between the side plate and the support plate, and can adapt to the length of the battery cell group composed of the plurality of battery cells through the deformation amount of the elastic member subjected to extrusion and elastic deformation; the adjusting group can also be a telescopic member arranged between the side plate and the support plate and capable of stretching or contracting, or other adjusting members capable of stretching and contracting to adapt to different length or size requirements.

[0026] In some embodiments, please refer to FIG. 3 and FIG. 4, which is an enlarged view of part A in FIG. 3. The adjusting group 150 includes a first connecting plate 151 and a second connecting plate 152. Wherein, the second connecting plate 152 is located at the upper end of the first connecting plate 151 and is oppositely arranged with the first connecting plate 151, one side of the first connecting plate 151 and the second connecting plate 152 is rotationally connected to the side plate 110, and the other side of the first connecting plate 151 and the second connecting plate 152 is rotationally connected to the support plate 131.

[0027] Specifically, the first connecting plate 151 and the second connecting plate 152 are oppositely arranged, and one side and the other side of the first connecting plate 151 and the second connecting plate 152 are respectively rotationally connected to the side plate 110 and the support plate 131, so that when the first connecting plate 151 rotates relative to the side plate 110, the second connecting plate 152 also rotates relative to the side plate 110, and the large plane of the first connecting plate 151 and the large plane of the second connecting plate 152 are parallel to each other after rotation. It is easy to understand that when the first connecting plate 151 and the second connecting plate 152 rotate relative to the side plate 110, the support plate 131 connected to the second side of the first connecting plate 151 and the second connecting plate 152 will also rotate, and the large plane of the support plate 131 is parallel to the side plate 110 during rotation, and is also parallel to the side surface of the plurality of battery cells 120, so that the support plate 131 uniformly distributes the extrusion force on the plurality of battery cells 120, and the support plate 131 abuts and extrudes the plurality of battery cells 120 to provide a fixing effect for the plurality of battery cells 120.

[0028] In some embodiments, please refer to FIG. 4. The support assembly 130 further includes a fixed plate 160 fixed to the side plate 110, and the specific fixing manner is not limited. One side of the first connecting plate 151 and the second connecting plate 152 is rotationally connected to the side plate 110 through the fixed plate 160. In this embodiment, by adding the fixed plate 160 to the side plate 110 of the box body, i.e., transferring the fixing points of the first connecting plate 151 and the second connecting plate 152 from the side plate 110 to the fixed plate 160, the design of the box body is more simple, and the operation of adding the fixed plate 160 is also more convenient to realize.

[0029] In some embodiments, please refer to FIG. 4 and FIG. 5, which is an exploded view of the support assembly 130 in FIG. 4. One side of the fixed plate 160 is provided with a plurality of first pivot connection portions 161, and one side of the first connecting plate 151 is rotationally connected to the plurality of first pivot connection portions 161; the other side of the fixed plate 160 is provided with a plurality of second pivot connection portions 162, and one side of the second connecting plate 152 is rotationally connected to the plurality of second pivot connection portions 162; wherein each first pivot connection portion 161 and the corresponding second pivot connection portion 162 are staggered in the height direction of the battery box 100.

[0030] In the embodiment, because each first pivot part 161 and the corresponding second pivot part 162 are staggered in the height direction of the battery pack, when one side of the first connecting plate 151 and one side of the second connecting plate 152 are respectively connected with the first pivot part 161 and the second pivot part 162, the two are also staggered in the height direction of the battery pack at the connection. This staggered structure can make the stress distribution of the first connecting plate 151 and the second connecting plate 152 more uniform when they are connected with the fixed plate 160, and the fixed plate 160 is less likely to be damaged due to concentrated stress. At the same time, this staggered structure can also ensure that the fixed plate 160, the first connecting plate 151 and the second connecting plate 152 are not easily offset in the width direction of the battery, which helps to ensure the stability of the support assembly 130 structure.

[0031] Wherein, the first connecting plate 151 can rotate around a rotating rod relative to the fixed plate 160 by passing through the holes on one side of the first connecting plate 151 and the holes surrounded by the second pivot parts 162, and the second connecting plate 152 can rotate around a rotating rod relative to the fixed plate 160 by passing through the holes on one side of the second connecting plate 152 and the holes surrounded by the first pivot parts 161. Similarly, the first connecting plate 151 can rotate around a rotating rod relative to the support plate 131 by passing through the holes on the other side of the first connecting plate 151 and the holes on the lower end of the support plate 131, and the second connecting plate 152 can rotate around a rotating rod relative to the support plate 131 by passing through the holes on the other side of the second connecting plate 152 and the holes on the upper end of the support plate 131. Finally, the support plate 131 can rotate relative to the fixed plate 160 by the cooperation of the fixed plate 160, the first connecting plate 151, the second connecting plate 152 and the support plate 131.

[0032] In addition, because the first connecting plate 151, the second connecting plate 152, the fixed plate 160 and the support plate 131 are all connected rotatably, before placing the battery cell 120 into the battery box 100, the support plate 131 needs to be lifted upward relative to the fixed plate 160 to increase the accommodation space of the battery box 100, and then the battery cell 120 is placed into the battery box 100.

[0033] In some embodiments, please refer to FIG. 3. The included angle between the large planar portion of the first connecting plate 151, the large planar portion of the second connecting plate 152 and the large planar portion of the fixing plate 160 is 90°. In this state, even if the battery box 100 appears to be shaken in the length direction of the plurality of battery cells 120, the extrusion force of the plurality of battery cells 120 on the support plate 131 is in the length direction of the plurality of battery cells 120, so that the support force provided by the first connecting plate 151 and the second connecting plate 152 to the support plate 131 can offset the above-mentioned extrusion force, and therefore the structure of the support assembly 130 is relatively stable and is not easy to deform to cause displacement of the plurality of battery cells 120.

[0034] In some embodiments, please refer to FIG. 3 and FIG. 4. The battery box 100 further comprises an insulating piece 170, which comprises a protection portion 171 and a limiting portion 172 connected to the protection portion 171 in a bent manner, and the battery box further comprises a bottom plate surrounding at least a part of the installation cavity 140; wherein the protection portion 171 is fixed to one side of the plurality of battery cells 120, and the support plate 131 abuts the side of the protection portion 171 away from the plurality of battery cells 120, and the first connecting plate 151 abuts the limiting portion 172, so that the limiting portion 172 is located between the first connecting plate 151 and the bottom plate.

[0035] Specifically, after the plurality of battery cells 120 are assembled, the protection portion 171 of the insulating piece 170 is fixed to the side of the plurality of battery cells 120 close to the support assembly 130, and the protection portion 171 between the side of the plurality of battery cells 120 and the support plate 131 is used to protect the side of the plurality of battery cells 120 during the process of the support plate 131 extruding the plurality of battery cells 120, so as to prevent the side of the plurality of battery cells 120 from being scratched by the support plate 131, so as to ensure the safety of the plurality of battery cells 120, and the limiting portion 172 between the first connecting plate 151 and the bottom plate provides a support function for the first connecting plate 151.

[0036] In some embodiments, the battery box 100 further comprises a fixing member penetrating through the first connecting plate 151 and the limiting portion 172 and fixed to the bottom plate. Specifically, after the assembly of the battery cells 120, the multiple rows of battery cell groups composed of the battery cells 120 and arranged side by side in the width direction of the battery cells 120 opposite to the protection portion 171 can have a shorter length, resulting in that the pressing force of the support plate 131 on the protection portion 171 is smaller. At this time, the first connecting plate 151 and the limiting portion 172 are fixed to one side of the battery box 100 by the fixing member. Since the protection portion 171 is connected to the limiting portion 172 in a bent manner, when the position of the limiting portion 172 is fixed, the position of the protection portion 171 is also fixed, and thus the position of the multiple battery cells 120 abutting against the protection portion 171 is also fixed. Therefore, the battery cells 120 can be prevented from moving when the pressing force of the support plate 131 on the protection portion 171 is small, so as to ensure the stability of the structure of the battery box 100.

[0037] Specifically, during the process of placing the battery cells 120 into the mounting cavity 140, the support assembly 130 is in the first state, and at this time the support assembly 130 does not abut against the battery cells 120. After all the battery cells 120 are placed, the protection portion 171 of the insulating member 170 is fixed to the side of the multiple battery cells 120 close to the support assembly 130, and the limiting portion 172 of the insulating member 170 abuts against the bottom plate of the battery box 100. At this time, the first connecting plate 151 is rotated from the initial position to the direction of the second connecting plate 152, so that the support plate 131 connected to the first connecting plate 151 gradually approaches the protection portion 171 and finally abuts against the protection portion 171. At this time, the first connecting plate 151 continues to rotate, and the support plate 131 continues to move downward relative to the protection portion 171 until the second connecting plate 152 abuts against the limiting portion 172. At this time, the first connecting plate 151 and the limiting portion 172 are fixed to the bottom plate of the battery box 100 by the fixing member penetrating through the bottom plate, the limiting portion 172 and the first connecting plate 151 of the battery box 100. The multiple battery cells 120 are fixed in the mounting cavity 140 by the support plate 131 pressing one side of the multiple battery cells 120 and cooperating with the fixing support member on the other side of the multiple battery cells 120. It is easy to understand that in some embodiments, the fixing support member on the other side of the multiple battery cells 120 can also be replaced by the support assembly 130, that is, the support assembly 130 is arranged on both sides of the multiple battery cells 120 to fix the multiple battery cells 120.

[0038] In some embodiments, please refer to FIG. 3. The height of the protection portion 171 is H1, the height of the support plate 131 is H2, and the height of the multiple battery cells 120 is H3, wherein H2≤H1≤H3.

[0039] Specifically, in the condition that the height of the protection part 171 is greater than or equal to the length of the fourth support, when the support assembly 130 is in the second position, the extrusion force distribution of the support assembly 130 on the protection part 171 can be ensured to be more uniform. At the same time, the height of the protection part 171 is less than or equal to the height of the plurality of battery cells 120, and at this time, the material cost of the protection part 171 can be reduced.

[0040] In some embodiments, please refer to FIG. 6 and FIG. 7, FIG. 6 is a structural schematic diagram of the support plate 131 and the plurality of battery cells 120 abutting, and FIG. 7 is a side view of FIG. 6. The width of the support plate 131 is D1, and the width of the plurality of battery cells 120 is D2, wherein D2-20mm≤D1≤D2.

[0041] Specifically, by limiting the width D1 of the support plate 131 to be greater than or equal to the width D2-20mm of the plurality of battery cells 120 and less than or equal to the width D2 of the plurality of battery cells 120, it can be ensured that the support plate 131 is sufficient to extrude one side of the plurality of battery cells 120 while saving the material cost of the support plate 131. When the width D1 of the support plate 131 is equal to the width D2 of the plurality of battery cells 120, the extrusion force distribution of the support plate 131 on the plurality of battery cells 120 is the most uniform.

[0042] The application provides a battery box 100, which comprises a box body provided with a mounting cavity 140 and a support assembly 130. The mounting cavity 140 is used for mounting a plurality of battery cells 120, and the support assembly 130 comprises a support plate 131. The box body comprises a side plate 110 surrounding at least part of the mounting cavity 140, and the support plate 131 is rotated to abut one side of the plurality of battery cells 120, so that the plurality of battery cells 120 abut the box body.

[0043] Compared with the related art, the battery box 100 provided by the application can conveniently adjust the support plate 131 movably connected to the side plate 110 to a suitable position to abut one side of the plurality of battery cells 120, so that the plurality of battery cells 120 abut the box body, thereby facilitating the assembly of the plurality of battery cells 120, and thus the assembly efficiency of the battery cells 120 is higher.

[0044] The application also provides a battery pack comprising a plurality of the above-mentioned battery boxes 100. The battery pack has all the advantages of the above-mentioned battery box 100, which will not be repeated here.

[0045] The application also provides a vehicle comprising the above-mentioned battery pack. The vehicle has all the advantages of the above-mentioned battery pack, which will not be repeated here.

Claims

1. A battery box, comprising: a box body provided with a mounting cavity configured to mount a plurality of battery cells, the box body comprising a side plate surrounding at least part of the mounting cavity; and a support assembly comprising a support plate and an adjusting set configured to adjust a spacing between the support plate and the side plate; wherein the support plate is configured to abut one side of the plurality of battery cells so that the plurality of battery cells abut the box body.

2. The battery pack of claim 1, wherein, The adjusting set is located between the side plate and the support plate, and is an elastic member or a telescopic member.

3. The battery pack of claim 1, wherein, The support plate is rotationally connected to the side plate via the adjusting set.

4. The battery pack of claim 3, wherein, The adjusting set comprises a first connecting plate and a second connecting plate, the second connecting plate being located at an upper end of the first connecting plate and being oppositely arranged to the first connecting plate; one side of the first connecting plate and the second connecting plate is rotationally connected to the side plate, and the other side of the first connecting plate and the second connecting plate is rotationally connected to the support plate. 5.The battery box of claim 4, further comprising a fixing plate fixed to the side plate, the one side of the first connecting plate and the second connecting plate being rotationally connected to the side plate via the fixing plate.

6. The battery pack of claim 5, wherein, One side of the fixing plate is provided with a plurality of first pivot joints, and the one side of the first connecting plate is rotationally connected to the plurality of first pivot joints; the other side of the fixing plate is provided with a plurality of second pivot joints, and the one side of the second connecting plate is rotationally connected to the plurality of second pivot joints; wherein each first pivot joint and a corresponding second pivot joint are staggered with each other in a height direction of the battery box.

7. The battery box of claim 5, further comprising an insulating piece including a guard portion and a limiting portion connected to the guard portion in a bent manner; the box further comprising a bottom plate enclosing at least a portion of the mounting cavity; wherein, The protection portion is fixed to the one side of the plurality of battery cells, and the support plate abuts a side of the protection portion away from the plurality of battery cells; and the first connecting plate abuts the limiting portion so that the limiting portion is located between the first connecting plate and the bottom plate.

8. The battery pack of claim 7, wherein, H2≤H1≤H3; wherein H1 is a height of the protection portion, H2 is a height of the support plate, and H3 is a height of the plurality of battery cells. 9.The battery box of claim 7, further comprising a fixing member penetrating through the first connecting plate and the limiting portion and fixed to the bottom plate.

10. The battery box according to any one of claims 1-9, wherein, D2-20mm≤D1≤D2; wherein D1 is a width of the support plate, and D2 is a width of the plurality of battery cells. 11.A battery pack comprising a plurality of battery boxes according to any one of claims 1-10. 12.A vehicle comprising the battery pack of claim 11.

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