Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack. The battery box comprises a box body provided with a mounting cavity and a supporting assembly, the mounting cavity is used for mounting a plurality of battery cells, the box body comprises side plates defining at least one part of the mounting cavity, and the supporting assembly comprises a supporting plate and an adjusting group configured to adjust the interval between the supporting plate and the side plates. Wherein the supporting plate is used for abutting against one side of each of the plurality of battery cells, so that the plurality of battery cells abut against the box body. Compared with the prior art that the battery cell is firstly extruded through an auxiliary tool and then is put into the mounting cavity. According to the battery box provided by the utility model, the supporting plate movably connected to the side plate can be conveniently adjusted to a proper position to abut against one sides of the plurality of battery cells, so that the plurality of battery cells abut against the box body, the plurality of battery cells can be conveniently assembled, and the assembling efficiency of the battery cells is higher.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and particularly to a battery box and a battery pack. Background Art

[0002] In the related art, a CTP (Cell-To-Pack) battery pack generally includes a box body, a plurality of battery cells, and two fixed supports located on both sides of the plurality of battery cells. The plurality of battery cells form a plurality of rows of battery cell groups placed side by side. Since there may be differences in the thickness between the battery cells, the length of the battery cell group may be greater than the distance between the two fixed supports. In this case, an auxiliary tooling is usually used to squeeze the battery cell group so that it can be placed between the two fixed supports. Since the operation of the auxiliary tooling is relatively complicated, the assembly efficiency of the battery cells is low. Summary of the Utility Model

[0003] Embodiments of the utility model provide a battery box and a battery pack, which can solve the problem of low assembly efficiency of battery cells.

[0004] In a first aspect, embodiments of the utility model provide a battery box, which includes:

[0005] A box body provided with an installation cavity for installing a plurality of battery cells. The box body includes side plates that enclose at least a part of the installation cavity; and

[0006] A support assembly including a support plate and an adjustment group configured to adjust the interval between the support plate and the side plate;

[0007] Wherein, the support plate is used to abut against one side of the plurality of battery cells so that the plurality of battery cells abut against the box body.

[0008] In one embodiment, the adjustment group is located between the side plate and the support plate, and the adjustment group is an elastic member or a telescopic member.

[0009] In one embodiment, the support plate is rotatably connected to the side plate through the adjustment group.

[0010] In one embodiment, the adjustment group includes a first connecting plate and a second connecting plate. The second connecting plate is located above the first connecting plate and is disposed opposite to the first connecting plate; one side of the first connecting plate and the second connecting plate is rotatably connected to the side plate, and the other side of the first connecting plate and the second connecting plate is rotatably connected to the support plate.

[0011] In one embodiment, the support assembly further includes a fixing plate fixed to the side plate, and one side of the first connecting plate and the second connecting plate is rotatably connected to the side plate through the fixing plate.

[0012] In one embodiment, a plurality of first pivot joints are provided on one side of the fixed plate, and one side of the first connecting plate is rotatably connected to the plurality of first pivot joints; a plurality of second pivot joints are provided on the other side of the fixed plate, and one side of the second connecting plate is rotatably connected to the plurality of second pivot joints; wherein, each first pivot joint and the corresponding second pivot joint are staggered with each other in the height direction of the battery box.

[0013] In one embodiment, the battery box further includes an insulating member, the insulating member includes a protection portion and a limiting portion bendably connected to the protection portion; the box body further includes a bottom plate surrounding at least a part of the installation cavity; wherein, the protection portion is fixed to one side of the plurality of battery cells, and the support plate abuts against the side of the protection portion away from the plurality of battery cells; the first connecting plate abuts against the limiting portion, so that the limiting portion is located between the first connecting plate and the bottom plate.

[0014] In one embodiment, H2 ≤ H1 ≤ H3; wherein, H1 is the height of the protection portion, H2 is the height of the support plate, and H3 is the height of the plurality of battery cells.

[0015] In one embodiment, the battery box further includes a fixing member, the fixing member passes through the first connecting plate and the limiting portion and is fixed to the bottom plate.

[0016] In one embodiment, D2 - 20mm ≤ D1 ≤ D2; wherein, D1 is the width of the support plate, and D2 is the width of the plurality of battery cells.

[0017] In a second aspect, an embodiment of the present invention provides a battery pack, including a plurality of battery pack housings as in the first aspect.

[0018] The present invention provides a battery box and a battery pack. The battery box includes a box body provided with an installation cavity and a support assembly. The installation cavity is used for installing a plurality of battery cells, and the support assembly includes a support plate. The box body includes side plates surrounding at least a part of the installation cavity. The support plate is used to abut against one side of the plurality of battery cells, so that the plurality of battery cells abut against the box body. In the battery box provided by the present invention, the support plate movably connected to the side plate can be conveniently adjusted to a suitable position to abut against one side of the plurality of battery cells, so that the plurality of battery cells abut against the box body, thereby facilitating the assembly of the plurality of battery cells. Therefore, the assembly efficiency of the battery cells is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of a battery box in the related art;

[0021] Figure 2 is a schematic structural diagram of a battery box provided by an embodiment of the present utility model;

[0022] Figure 3 is Figure 2 a sectional view of;

[0023] Figure 4 is Figure 3 an enlarged schematic view of part A in;

[0024] Figure 5 is Figure 4 an exploded view of the support assembly in;

[0025] Figure 6 is Figure 1 a schematic structural diagram of the support plate abutting against a plurality of battery cells in;

[0026] Figure 7 is Figure 6 a side view of;

[0027] Explanation of reference numerals:

[0028] 100A, battery box; 110A, box body; 120A, battery cell; 130A, fixed support member; 100, battery box; 110, side plate; 120, battery cell; 130, support assembly; 131, support plate; 140, installation cavity; 150, adjustment group; 151, first connection plate; 152, second connection plate; 160, fixing plate; 161, first pivoting portion; 162, second pivoting portion; 170, insulating member; 171, protection portion; 172, limiting portion. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0030] In the related art, please refer to Figure 1 , Figure 1It is a schematic structural diagram of a battery box 100A in the related art. The battery box 100A generally includes a box body 110A, a plurality of battery cells 120A located inside the box body 110A, and fixed support members 130A located on both sides of the plurality of battery cells 120A. The fixed support members 130A are used to fix the plurality of battery cells 120A. Since the positions of the fixed support members 130A are fixed, the distance between the two fixed support members 130A is also fixed. However, due to possible thickness differences between the plurality of battery cells 120A, taking the plurality of battery cells 120A in the length direction of the box body 110A as a battery cell group, during the process of assembling the battery cells 120A, it may occur that the length of a battery cell group is greater than the distance between the two fixed support members 130A. At this time, it is very difficult to put the battery cell group 120A into the battery box 100A body. 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 body at this time, since the length of the battery cell group is less than the distance between the two fixed support members 130A at this time, the fixed support members 130A cannot effectively fix the battery cell group. Therefore, usually an auxiliary tooling is needed during the assembly of the battery cells 120A to squeeze the plurality of battery cell groups so that the length of each battery cell group is equal to the distance between the two fixed support members 130A before the battery cell group can be put between the two fixed support members 130A. However, due to the use of the auxiliary tooling, the assembly efficiency of the battery cells 120A is relatively low.

[0031] To solve the above problem of relatively low battery cell assembly efficiency, an embodiment of the present invention provides a battery box 100. Please refer to Figure 2 、 Figure 3 , Figure 2 which is a schematic structural diagram of the battery box 100 provided by the embodiment of the present invention. Figure 3 It is Figure 2 a cross-sectional view. The battery box 100 includes a box body provided with an installation cavity 140 and a support assembly 130. The box body includes side plates 110 that enclose at least a part of the installation cavity 140. The installation cavity 140 is used to install a plurality of battery cells 120. The support assembly 130 includes a support plate 131 and an adjustment group 150 configured to adjust the interval between the support plate and the side plate. And the support plate 131 is used to abut against one side of the plurality of battery cells 120 so that the plurality of battery cells 120 abut against and are fixed to the box body. Among them, the support plate 131 can be a telescopic elastic member.

[0032] Compared with the related art, during the process of assembling the battery cells 120 in the battery box 100 provided in this embodiment, it is not necessary to squeeze multiple battery cells 120 in each battery cell group in advance through an auxiliary tooling and then put them into the box body. Instead, after all the battery cells 120 are placed, the support plate 131 of the support assembly 130 is directly used to abut against and fix multiple battery cells 120 in the box body. The support plate 131 movably connected to the side plate 110 can be conveniently adjusted to a suitable position to abut against one side of multiple battery cells 120, so that multiple battery cells 120 abut against the box body, thereby facilitating the assembly of multiple battery cells. At the same time, the space occupied by the support assembly 130 in the battery box 100 is small, so the space available for operation during the assembly of the battery cells 120 is large, making the assembly of the battery cells 120 more convenient and flexible, and thus the battery cell assembly efficiency is higher.

[0033] In some embodiments, please refer to Figure 3 . The support assembly 130 further includes an adjustment group 150, and the support plate 131 is rotatably connected to the side plate 110 through the adjustment group 150. Among them, before multiple battery cells 120 are all assembled into the installation cavity 140, the distance between the support plate 131 connected to the adjustment group 150 and multiple battery cells 120 is relatively far. At this time, the space for assembling the battery cells 120 in the installation cavity 140 is large, which is convenient for the assembly operation. After all the battery cells 120 are assembled into the installation cavity 140, the adjustment group 150 rotates and drives the support plate 131 to gradually approach multiple battery cells 120 and finally abut against and squeeze multiple battery cells 120 to provide a fixing effect for multiple battery cells 120.

[0034] In some embodiments, the adjustment group 150 can be an elastic member that undergoes a certain deformation when subjected to an external force and can return to the initial state or close to the initial state after the external force is removed. The elastic member is disposed between the side plate and the support plate, and the amount of elastic deformation of the elastic member under extrusion can be used to adapt to the lengths of different battery cell groups composed of multiple battery cells; the adjustment group can also be a telescopic member that can be extended or contracted disposed between the side plate and the support plate, or other adjustment members that can achieve telescoping to meet different length or size requirements.

[0035] In some embodiments, please refer to Figure 3 、 Figure 4 , Figure 4 is Figure 3 an enlarged schematic view of part A in

[0036] Specifically, through the relatively arranged first connecting plate 151 and second connecting plate 152, with one side and the other side of the two respectively rotatably connected to the side plate 110 and the support plate 131, when the first connecting plate 151 rotates relative to the side plate 110, the second connecting plate 152 will also rotate relative to the side plate 110 accordingly, and after rotation, the large planes of the first connecting plate 151 and the second connecting plate 152 are parallel to each other. 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 sides of the two will also rotate accordingly, and during the rotation process, the large plane of the support plate 131 is parallel to the side plate 110 and also parallel to the sides of multiple battery cells 120, making the extrusion force generated by the support plate 131 on the multiple battery cells 120 more evenly distributed. The support plate 131 abuts against and squeezes the multiple battery cells 120 to provide a fixing effect for the multiple battery cells 120.

[0037] In some embodiments, please refer to Figure 4 . The support assembly 130 further includes a fixing plate 160, which is fixed to the side plate 110, and the specific fixing method is not limited. One side of the first connecting plate 151 and the second connecting plate 152 is rotatably connected to the side plate 110 through the fixing plate 160. In this embodiment, by adding the fixing plate 160 to the side plate 110 of the box body, that is, transferring the fixing points of the first connecting plate 151 and the second connecting plate 152 from the side plate 110 to the fixing plate 160, the design of the box body is made simpler, and the operation of adding the fixing plate 160 is also more convenient to implement.

[0038] In some embodiments, please refer to Figure 4 、 Figure 5 , Figure 5 is Figure 4 an exploded view of the support assembly 130 in

[0039] In this embodiment, since each first pivoting portion 161 located on both sides of the fixing plate 160 in the battery height direction is staggered from the corresponding second pivoting portion 162 in the battery pack height direction, when one side of the first connecting plate 151 and one side of the second connecting plate 152 are respectively rotatably connected to the first pivoting portion 161 and the second pivoting portion 162, they are also staggered from each other in the battery pack height direction at the connection. Through this staggered structure, the force distribution when the first connecting plate 151 and the second connecting plate 152 are connected to the fixing plate 160 can be relatively uniform, and the fixing plate 160 is not easily damaged due to concentrated force at a certain place. At the same time, this staggered structure can also ensure that there is no offset between the fixing plate 160, the first connecting plate 151 and the second connecting plate 152 in the battery width direction, which helps to ensure the stability of the structure of the support assembly 130.

[0040] In some embodiments, please refer to Figure 3 . The angles between the large plane portions of the first connecting plate 151, the large plane portions of the second connecting plate 152 and the large plane portion of the fixing plate 160 are all 90°. In this state, even when the battery box 100 shakes in the length direction of multiple battery cells 120, the extrusion forces of the multiple battery cells 120 on the support plate 131 are also in the length direction of the multiple battery cells 120, so that the supporting forces provided by the first connecting plate 151 and the second connecting plate 152 for the support plate 131 can offset the above extrusion forces. Therefore, the structure of the support assembly 130 is relatively stable and not easily deformed, resulting in displacement of the multiple battery cells 120.

[0041] In some embodiments, please refer to Figure 3 、 Figure 4 , the battery box 100 further includes an insulating member 170. The insulating member 170 includes a protection portion 171 and a limiting portion 172 bent and connected to the protection portion 171. The box body further includes a bottom plate that encloses at least a part of the installation cavity 140; wherein, the protection portion 171 is fixed to one side of the multiple battery cells 120, and the support plate 131 abuts against the side of the protection portion 171 away from the multiple battery cells 120, and the first connecting plate 151 abuts against the limiting portion 172 so that the limiting portion 172 is located between the first connecting plate 151 and the bottom plate.

[0042] Specifically, after the multiple battery cells 120 are assembled, 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. The protection portion 171 located between one side of the multiple battery cells 120 and the support plate 131 is used to protect one side of the multiple battery cells 120 during the process of the support plate 131 extruding the multiple battery cells 120, preventing one side of the multiple battery cells 120 from being scratched by the support plate 131 to ensure the safety of the multiple battery cells 120, and the limiting portion 172 located between the first connecting plate 151 and the bottom plate provides a supporting effect for the first connecting plate 151.

[0043] In some embodiments, the battery box 100 further includes a fixing member that passes through the first connecting plate 151 and the limiting portion 172 and is fixed to the bottom plate. Specifically, after the battery cells 120 are assembled, there may be a situation where the length of the multi-row battery cell group composed of multiple battery cells 120 and arranged side by side in the width direction of the battery cells 120 and opposite to the protection portion 171 is relatively short. As a result, although the support plate 131 abuts against the protection portion 171, the squeezing force exerted on the protection portion 171 is small. At this time, the first connecting plate 151 and the limiting portion 172 are fixed to one side of the battery box 100 body through the fixing member. Since the protection portion 171 is bent and connected to the limiting portion 172, when the position of the limiting portion 172 is fixed, the position of the protection portion 171 is also fixed. Therefore, the positions of the multiple battery cells 120 abutting against the protection portion 171 are also fixed. Thus, even when the squeezing force exerted by the support plate 131 on the protection portion 171 is small, the battery cells 120 can be prevented from moving, ensuring the structural stability of the battery box 100.

[0044] Specifically, during the process of placing the battery cells 120 into the installation 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 rotates from the initial position towards the second connecting plate 152, causing the support plate 131 rotatably connected to the first connecting plate 151 to gradually approach the protection portion 171 and finally abut 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 fixing member passes through the bottom plate of the battery box 100, the limiting portion 172, and the first connecting plate 151, and fixes the first connecting plate 151 and the limiting portion 172 to the bottom plate of the battery box 100. By squeezing one side of the multiple battery cells 120 through the support plate 131 and cooperating with the fixed support member located on the other side of the multiple battery cells 120, the multiple battery cells 120 are fixed in the installation cavity 140. It is easy to understand that in some embodiments, the above-mentioned fixed support member located on the other side of the multiple battery cells 120 can also be replaced by the support assembly 130, that is, support assemblies 130 are provided on both sides of the multiple battery cells 120 to fix the multiple battery cells 120.

[0045] In some embodiments, please refer to Figure 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, where H2 ≤ H1 ≤ H3.

[0046] Specifically, under the condition that the height of the protection part 171 is greater than or equal to the length of the fourth support member, when the support assembly 130 is in the second position, it can ensure that the extrusion force distribution of the support assembly 130 on the protection part 171 is relatively 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.

[0047] In some embodiments, please refer to Figure 6 、 Figure 7 , Figure 6 is Figure 1 the structural schematic diagram of the middle support plate 131 abutting against the plurality of battery cells 120, Figure 7 is Figure 6 the side view of. The width of the support plate 131 is D1, and the width of the plurality of battery cells 120 is D2, where D2 - 20 mm ≤ D1 ≤ D2.

[0048] Specifically, by limiting the width D1 of the support plate 131 to be greater than or equal to D2 - 20 mm of the width 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 ensure that while saving a certain amount of material cost of the support plate 131, it can also ensure that the support plate 131 is sufficient to squeeze one side of the plurality of battery cells 120. And when the width D1 of the support plate 131 is equal to the width D2 of the plurality of battery cells 120, at this time, the extrusion force distribution of the support plate 131 on the plurality of battery cells 120 is the most uniform.

[0049] The present utility model provides a battery box 100, which includes a box body provided with an installation cavity 140 and a support assembly 130. The installation cavity 140 is used for installing a plurality of battery cells 120, and the support assembly 130 includes a support plate 131. Among them, the box body includes side plates 110 that enclose at least a part of the installation cavity 140, and the support plate 131 rotates to abut against one side of the plurality of battery cells 120, so that the plurality of battery cells 120 abut against the box body.

[0050] Compared with the related art in which the battery cells 120 are first extruded by an auxiliary tooling and then placed into the installation cavity 140, the battery box 100 provided by the present utility model can conveniently adjust the support plate 131 movably connected to the side plate 110 to a suitable position to abut against one side of the plurality of battery cells 120, so that the plurality of battery cells 120 abut against the box body, thereby facilitating the assembly of the plurality of battery cells 120. Therefore, the assembly efficiency of the battery cells 120 is higher.

[0051] The embodiment of the present utility model also provides a battery pack, which includes a plurality of the above-mentioned battery boxes 100. This battery pack has all the advantages of the above-mentioned battery box 100 and will not be elaborated here.

[0052] The above has introduced the embodiments of the present utility model in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A battery box, characterized in that: include: A box body is provided with an installation cavity, the installation cavity is used to install a plurality of battery cells, the box body includes a side plate, and the side plate surrounds at least a part of the installation cavity; as well as A support assembly, comprising a support plate and an adjustment group configured to adjust the interval between the support plate and the side plate; Wherein, the support plate is used to abut against one side of the plurality of battery cells so that the plurality of battery cells abut against the box body.

2. The battery box according to claim 1, characterized in that: The adjustment group is located between the side plate and the support plate, and the adjustment group is an elastic member or a retractable member.

3. The battery box according to claim 1, characterized in that: The support plate is rotatably connected to the side plate through the adjustment group.

4. The battery box according to claim 3, characterized in that: The adjustment group includes a first connecting plate and a second connecting plate, the second connecting plate is located at the upper end of the first connecting plate and is arranged opposite to the first connecting plate; one side of the first connecting plate and the second connecting plate is rotatably connected to the side plate, and the other side of the first connecting plate and the second connecting plate is rotatably connected to the support plate.

5. The battery box according to claim 4, characterized in that: The support assembly further includes a fixing plate, which is fixed to the side plate, and the first connecting plate and the one side of the second connecting plate are rotatably connected to the side plate through the fixing plate.

6. The battery box according to claim 5, characterized in that: A plurality of first pivoting parts are provided on one side of the fixed plate, and the one side of the first connecting plate is rotatably connected to the plurality of first pivoting parts; a plurality of second pivoting parts are provided on the other side of the fixed plate, and the one side of the second connecting plate is rotatably connected to the plurality of second pivoting parts; wherein each first pivoting part and the corresponding second pivoting part are staggered with each other in the height direction of the battery box.

7. The battery box according to claim 5, characterized in that: It also includes an insulating member, which includes a protective part and a limiting part connected to the protective part in a bent manner; the box body also includes a bottom plate that surrounds at least a part of the installation cavity; wherein the protective part is fixed to the one side of the multiple battery cells, and the support plate abuts against the side of the protective part away from the multiple battery cells; the first connecting plate abuts against the limiting part so that the limiting part is located between the first connecting plate and the bottom plate.

8. The battery box according to claim 7, characterized in that: H2≤H1≤H3; wherein H1 is the height of the protective portion, H2 is the height of the support plate, and H3 is the height of the plurality of battery cells.

9. The battery box according to claim 7, characterized in that: It also includes a fixing piece, which passes through the first connecting plate and the limiting portion and is fixed to the bottom plate.

10. The battery box according to any one of claims 1 to 9, characterized in that: D2-20mm≤D1≤D2; wherein D1 is the width of the support plate, and D2 is the width of the plurality of battery cells.

11. A battery pack, characterized in that: A battery box comprising a plurality of battery boxes according to any one of claims 1 to 10.

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