Battery box body and battery

Abstract

The utility model discloses a battery box body and a battery, and relates to the technical field of batteries. The battery box body is used for accommodating single batteries and comprises a box body frame, and a heat exchange plate and a bottom protection plate which are respectively connected with the box body frame; the heat exchange plate is located between the bottom protection plate and the box frame. At least one elastic layer is arranged between the heat exchange plate and the bottom protection plate, and the heat exchange plate and the bottom protection plate jointly clamp the elastic layer, so that the elastic layer is in a compressed state. The bottom protection plate abuts against the elastic layer and compresses the elastic layer, so that the elastic layer is in a compressed state, energy generated when the bottom protection plate is collided can be absorbed through the elastic layer, and the elastic layer can serve as an energy absorption device, so that the influence on a heat exchange plate and a battery module in the battery box body when the bottom protection plate is collided can be reduced; the structural strength of the battery box body is improved, so that the safety of the battery box body is improved, the size of the bottom space of the battery box body is reduced, and the size of the internal space of the battery box body is increased.

Description

Technical Field

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

[0002] A conventional battery pack usually consists of a battery case, a heat exchange plate and batteries. The heat exchange plate is installed above the bottom plate of the battery case, and the batteries are placed on the heat exchange plate. However, the bottom structure strength of the existing battery pack is relatively low. During actual use, the bottom plate of the case is damaged by impact due to external factors, and the bottom plate of the case is damaged by excessive bending upward. In order to prevent the heat exchange plate from being hit by the upward bent bottom plate of the case, the heat exchange plate will be separated from the bottom plate of the case by a certain distance, but this will cause the internal space of the battery pack to be reduced, which cannot meet the use requirements. Utility Model Content

[0003] To this end, the utility model provides a battery box and a battery, which solve the problem that the bottom structure strength of the existing battery pack is low and the internal space of the battery pack is small.

[0004] To achieve the above-mentioned purpose, the utility model specifically provides the following technical solutions: a battery box, used to accommodate battery cells, includes a box frame and a heat exchange plate and a bottom guard plate respectively connected to the box frame; the bottom guard plate is located at the bottom of the box frame, the heat exchange plate is located between the bottom guard plate and the box frame, and is used to exchange heat for the battery cells; at least one elastic layer is arranged between the heat exchange plate and the bottom guard plate, and the heat exchange plate and the bottom guard plate jointly clamp the elastic layer so that the elastic layer is in a compressed state.

[0005] Optionally, the battery box also includes a connecting component, a first mounting hole is provided on the heat exchange plate, and a second mounting hole is provided on the bottom guard plate at a position corresponding to the first mounting hole, the connecting component is simultaneously passed through the first mounting hole and the second mounting hole and connected to the box frame, and the bottom guard plate is subjected to the force of the connecting component to clamp the elastic layer together with the heat exchange plate.

[0006] Optionally, the connecting assembly includes a rivet and a connecting bolt, the rivet passes through the first mounting hole and is confined within the box frame, the connecting bolt is connected to the rivet and is used to drive the rivet to deform, the deformation of the rivet is used to apply a first force to the heat exchange plate in a direction away from the bottom guard plate, and make the heat exchange plate abut against the box frame; the connecting bolt also passes through the second mounting hole and applies a second force to the bottom guard plate towards the heat exchange plate, so that the bottom guard plate can clamp the elastic layer together with the heat exchange plate.

[0007] Optionally, the rivet comprises a connected rod body and an annular boss, the rod body is provided with a threaded hole, the annular boss is provided on the side of the heat exchange plate facing away from the box frame, the connecting bolt is connected to the threaded hole and drives the annular boss to deform, and the deformed annular boss applies the first force to the heat exchange plate.

[0008] Optionally, the connecting bolt includes a connected screw and a bolt head, the screw passes through the first mounting hole and the second mounting hole at the same time and is connected to the threaded hole, and the bolt head abuts against a side of the bottom guard plate facing away from the heat exchange plate to apply the second force to the bottom guard plate.

[0009] Optionally, there is a gap between the bottom guard plate and the annular boss, or the bottom guard plate abuts against the annular boss under the second force.

[0010] Optionally, the box frame includes an outer frame and at least two cross beams connected to the outer frame and arranged at intervals, each of the cross beams is connected to a plurality of the rivets, and each of the rivets is connected to the connecting bolts, so that the bottom guard plate and the heat exchange plate are fixedly connected to the plurality of cross beams at the same time.

[0011] Optionally, the bottom guard plate includes a first area and a second area arranged on the periphery of the first area, the first area is connected to the plurality of beams simultaneously by the plurality of connecting bolts, and the second area is connected to the outer frame as a whole by friction welding.

[0012] Optionally, the elastic layer is hard PU foam or silica gel; the battery box also includes an adhesive layer, the adhesive layer is arranged between the elastic layer and the heat exchange plate, and the adhesive layer connects the elastic layer and the heat exchange plate.

[0013] In addition, a battery is provided, comprising at least one battery cell and the above-mentioned battery case, wherein the battery cell is accommodated in the battery case.

[0014] Compared with the prior art, the utility model has the following beneficial effects: during the use of the battery box, the bottom of the battery box is collided by external factors, and the bottom guard plate mainly functions to protect the heat exchange plate to reduce the impact of external factors on the heat exchange plate, and the bottom guard plate will be deformed toward the heat exchange plate. An elastic layer is provided between the heat exchange plate and the bottom guard plate. Since the elastic layer is elastic, the heat exchange plate and the bottom guard plate jointly clamp the elastic layer, and the bottom guard plate abuts against and compresses the elastic layer, so that the elastic layer is in a compressed state, so that the energy of the collision of the bottom guard plate can be absorbed through the elastic layer. The elastic layer can act as an energy absorbing device, thereby reducing the impact of the bottom guard plate on the heat exchange plate and the battery module inside the battery box when it is collided, improving the structural strength of the battery box, so as to improve the safety of the battery box, and since the heat exchange plate and the bottom guard plate jointly clamp the elastic layer, so that the elastic layer is in a compressed state, this can reduce the distance between the heat exchange plate and the bottom guard plate, and can effectively reduce the size of the bottom space of the battery box, so that the size of the internal space of the battery box can be increased to meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the structure of a battery box provided by an embodiment of the utility model;

[0017] Figure 2 A partial cross-sectional view of a battery box provided in an embodiment of the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged view of part A of the battery box provided by an embodiment of the utility model;

[0019] Figure 4 A partial cross-sectional view of a box frame, bottom protective plate, heat exchange plate and foam layer of a battery box provided in an embodiment of the utility model.

[0020] The numbers in the figure represent the following:

[0021] Box frame 100; outer frame 110; crossbeam 120; third mounting hole 121; heat exchange plate 200; first mounting hole 201; bottom guard plate 300; second mounting hole 301; rivet 410; rod body 411; annular boss 412; connecting bolt 420; screw rod 421; bolt head 422; elastic layer 500. DETAILED DESCRIPTION

[0022] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Reference below Figures 1 to 4 A battery box and a battery according to an embodiment of the utility model are described.

[0026] According to the battery box of the embodiment of the utility model, the battery box is used to accommodate battery cells, and the battery box includes a box frame 100 and a heat exchange plate 200 and a bottom guard plate 300 respectively connected to the box frame 100; the bottom guard plate 300 is located at the bottom of the box frame 100, and the heat exchange plate 200 is located between the bottom guard plate 300 and the box frame 100, and is used for heat exchange of the battery cells; at least one elastic layer 500 is arranged between the heat exchange plate 200 and the bottom guard plate 300, and the heat exchange plate 200 and the bottom guard plate 300 jointly clamp the elastic layer 500, so that the elastic layer 500 is in a compressed state.

[0027] During the use of the battery box, the bottom of the battery box is impacted by external factors. The bottom guard plate 300 is mainly used to protect the heat exchange plate 200 to reduce the impact of external factors on the heat exchange plate 200, and the bottom guard plate 300 will be deformed toward the heat exchange plate 200. By arranging an elastic layer 500 between the heat exchange plate 200 and the bottom guard plate 300, since the elastic layer 500 is elastic, the heat exchange plate 200 and the bottom guard plate 300 jointly clamp the elastic layer 500, and the bottom guard plate 300 abuts against and compresses the elastic layer 500, so that the elastic layer 500 is in a compressed state, so that the elastic layer 500 can pass through the elastic layer 500 absorbs the energy of the bottom guard plate 300 when it is hit by a collision. The elastic layer 500 can act as an energy absorbing device, thereby reducing the impact of the bottom guard plate 300 on the heat exchange plate 200 and the battery module inside the battery box when it is hit, thereby improving the structural strength of the battery box to improve the safety of the battery box. In addition, since the heat exchange plate 200 and the bottom guard plate 300 jointly clamp the elastic layer 500, the elastic layer 500 is in a compressed state, which can reduce the distance between the heat exchange plate 200 and the bottom guard plate 300, and can effectively reduce the size of the bottom space of the battery box, so as to increase the size of the internal space of the battery box to meet the use requirements.

[0028] The application of the elastic layer 500 also improves the structural strength of the bottom of the battery box, so that the bottom of the battery box can protect the heat exchange plate 200 and batteries and other structural parts in the battery box when it is scratched.

[0029] Specifically, the battery box can be used to accommodate the on-board battery of an electric vehicle and be used in the electric vehicle. The battery box can effectively reduce the bottom space of the battery box to increase the ground clearance of the entire vehicle. The application of the elastic layer also improves the structural strength of the bottom of the battery pack, so that when the bottom of the battery pack is scratched during the driving of the electric vehicle, the battery box can protect the heat exchange plate, battery and other structural parts in the on-board battery.

[0030] Reference Figure 2 and Figure 3 It can be understood that the elastic layer 500 abuts against the bottom end of the heat exchange plate 200 and the top end of the bottom guard plate 300. When the bottom guard plate 300 is affected by external factors and deforms toward the heat exchange plate 200, the elastic layer 500 can absorb the energy of the collision of the bottom guard plate 300 and reduce the deformation of the bottom guard plate 300, thereby protecting the bottom guard plate 300.

[0031] Reference Figure 2 and Figure 4It can be understood that the battery box also includes a connecting component 400, a first mounting hole 201 is provided on the heat exchange plate 200, and a second mounting hole 301 is provided on the bottom guard plate 300 at a position corresponding to the first mounting hole 201. The connecting component is simultaneously penetrated into the first mounting hole 201 and the second mounting hole 301 and connected to the box frame 100, and the bottom guard plate 300 is subjected to the force of the connecting component and clamps the elastic layer 500 together with the heat exchange plate 200.

[0032] The box frame 100, the bottom guard plate 300 and the heat exchange plate 200 can be connected through the connecting component 400 to fix the position of the elastic layer 500 through the bottom guard plate and the heat exchange plate 200. Specifically, a through-hole structure arranged opposite to the first mounting hole 201 and the second mounting hole 301 is provided on the elastic layer 500, and the connecting component can be passed through the connecting plate and the heat exchange plate 200. Of course, other air-avoiding structures can also be provided on the elastic layer so that the connecting component can work normally; wherein the connecting component 400 abuts against one end of the bottom guard plate 300 away from the elastic layer 500 so as to limit the position of the bottom guard plate 300, and enables the bottom guard plate and the heat exchange plate 200 to clamp the elastic layer 500 together.

[0033] Specifically, a clearance structure is provided at a position of the elastic layer 500 that is opposite to the first mounting hole 201 and the second mounting hole 301 to avoid affecting the installation of the connection assembly.

[0034] Reference Figure 2 and Figure 3 It can be understood that the connecting assembly includes a rivet 410 and a connecting bolt 420. The rivet 410 passes through the first mounting hole 201 and is limited in the box frame 100. The connecting bolt 420 is connected to the rivet 410 and is used to drive the rivet 410 to deform. The deformation of the rivet 410 is used to apply a first force to the heat exchange plate 200 in a direction away from the bottom guard plate 300, and make the heat exchange plate 200 abut against the box frame 100; the connecting bolt 420 also passes through the second mounting hole 301 and applies a second force to the bottom guard plate 300 to approach the heat exchange plate 200, so that the bottom guard plate 300 can clamp the elastic layer 500 together with the heat exchange plate 200.

[0035] The heat exchange plate 200 and the box frame 100 can be connected by the rivet 410 , and the rivet 410 and the bottom guard plate 300 can be connected by the connecting bolts 420 .

[0036] After the connecting bolt 420 passes through the pull member 410, it continues to rotate to deform the pull member 410, so that the pull member 410 abuts against the end of the heat exchange plate 200 away from the bottom guard plate 300, and the connecting bolt 430 abuts against the end of the bottom guard plate 300 away from the heat exchange plate 200, so that the pull member 410 and the connecting bolt 420 can jointly clamp the heat exchange plate 200 and the bottom guard plate 300, so that the bottom guard plate 300 can clamp the elastic layer 500 together with the heat exchange plate 200.

[0037] Specifically, the direction of the first force is opposite to the direction of the second force; wherein, the direction of the first force is vertically downward so that the heat exchange plate 200 can press the elastic layer 400 downward, and the direction of the second force is vertically upward so that the bottom guard plate 300 can press the elastic layer 400 upward.

[0038] Reference Figure 3 It can be understood that the elastic layer 500 is hard PU foam or silicone; the battery box also includes an adhesive layer, which is arranged between the elastic layer 500 and the heat exchange plate 200, and the adhesive layer connects the elastic layer 500 and the heat exchange plate 200.

[0039] There are multiple elastic layers 500 , and the multiple elastic layers 500 are stacked one on top of the other. The buffering effect can be improved by providing multiple elastic layers 500 .

[0040] It is understandable that the elastic layer 500 can be silicone foam or hard PU foam, which has the advantages of high hardness, good strength and low density. If the vehicle encounters a scratch while driving, it can also act as an energy absorbing device to absorb the energy of the collision. Of course, depending on the specific actual situation, the elastic layer 500 can also be composed of foam of other materials.

[0041] The adhesive layer is arranged between the elastic layer 500 and the heat exchange plate 200, and the adhesive layer connects the elastic layer 500 and the heat exchange plate 200. By setting the adhesive layer, the elastic layer 500 and the heat exchange plate can be connected to improve the stability between the elastic layer 500 and the heat exchange plate 200. Specifically, the adhesive layer can be formed by curing glue or other sticky substances.

[0042] Reference Figure 2 It can be understood that there are multiple connection components.

[0043] By setting up multiple connection components, the stability of the connection between the heat exchange plate 200, the bottom guard plate 300 and the box frame 100 can be improved to improve the reliability of the battery box; wherein, the connecting bolts 420 and the rivets 410 are all connected one by one to reduce the difficulty of installation.

[0044] Reference Figure 2 and Figure 3It can be understood that the rivet 410 includes a connected rod body 411 and an annular boss 412, a threaded hole is provided in the rod body 411, the annular boss 412 is provided on the side of the heat exchange plate 200 facing away from the box frame 100, the connecting bolt 420 is connected to the threaded hole and drives the annular boss 412 to deform, and the deformed annular boss 412 applies a first force to the heat exchange plate 200.

[0045] After the connecting bolt 420 passes through the pull member 410, continue to rotate the connecting bolt 420 to deform the pull member 410, so that the pull member 410 abuts against the end of the heat exchange plate 200 away from the bottom guard plate 300, and the connecting bolt 430 abuts against the end of the bottom guard plate 300 away from the heat exchange plate 200, so that the pull member 410 and the connecting bolt 420 can jointly clamp the heat exchange plate 200 and the bottom guard plate 300, so that the bottom guard plate 300 can clamp the elastic layer 500 together with the heat exchange plate 200.

[0046] The rod 411 of the rivet 410 passes through the first mounting hole 201 and is connected to the box frame 100 until the annular boss 412 abuts against the lower end of the elastic layer 500 to limit the position of the rivet 410; wherein the rivet 410 can be a rivet nut.

[0047] Specifically, the elastic layer 500 is conformable foam, that is, the elastic layer 500 and the heat exchange plate 200 are arranged in contact with each other, and the elastic layer 500 can be fully in contact with the bottom end surface of the heat exchange plate 200 to ensure the buffering effect of the elastic layer 500.

[0048] Reference Figures 2 to 4 It can be understood that the connecting bolt 420 includes a connected screw rod 421 and a bolt head 422, the screw rod 421 passes through the first mounting hole 201 and the second mounting hole 301 at the same time and is connected to the threaded hole, and the bolt head 422 abuts against the side of the bottom guard plate 300 facing away from the heat exchange plate 200 to apply a second force to the bottom guard plate 300.

[0049] The screw rod 421 is screwed into the threaded hole of the rod body 411 until the bolt head 422 abuts against the bottom end of the bottom guard plate 300. The bolt head 422 can limit the position of the bottom guard plate 300 and can cooperate with the annular boss 412 to fix the bottom guard plate 300. Since the rod body 421 of the connecting bolt 420 is screwed into the pull member 410, it can drive the bolt head 422 to move, so that the bolt head 422 abuts against the side of the bottom guard plate 300 facing away from the heat exchange plate 200, so that the bolt head 422 applies a second force to the bottom guard plate 300.

[0050] Reference Figure 2 and Figure 3 It can be understood that there is a gap between the bottom guard plate 300 and the annular boss 412, or the bottom guard plate 300 is abutted against the annular boss 412 by the second force.

[0051] There is a gap between the bottom guard plate 300 and the annular boss 412 so that the bottom guard plate 300 and the heat exchange plate 200 are separated by the annular boss 412; of course, according to the specific actual situation, the bottom guard plate 300 can be installed under the heat exchange plate 200 until the annular boss 412 abuts against the top of the bottom guard plate 300 to limit the position of the bottom guard plate 300; by setting the annular boss 412, the distance between the elastic layer 500 and the bottom guard plate 300 can be limited.

[0052] Reference Figure 1 and Figure 2 It can be understood that the box frame 100 includes an outer frame 110 and at least two beams 120 connected to the outer frame 110 and arranged at intervals, each beam 120 is connected to a plurality of rivets 410, and each rivet 410 is connected to a connecting bolt 420, so that the bottom guard plate 300 and the heat exchange plate 200 are fixedly connected to the plurality of beams 120 at the same time.

[0053] By providing a plurality of tie-joints 410 and connecting bolts 420 , the stability of the heat exchange plate 300 and the bottom guard plate 200 connected to the plurality of beams can be improved; specifically, each beam 120 is connected to the heat exchange plate 300 and the bottom guard plate 200 via a plurality of tie-joints 410 and connecting bolts 420 .

[0054] Reference Figure 1 It can be understood that the bottom guard plate 300 includes a first area and a second area arranged on the periphery of the first area, the first area is simultaneously connected to multiple beams 120 by multiple connecting bolts 420, and the second area is connected to the outer frame 110 as a whole by friction welding.

[0055] The outer frame 110 is arranged in the first area at the edge of the bottom guard plate 300, and the ends of multiple outer frames 110 are abutted in sequence, and the abutting parts of the outer frames 110 are fixed by stir friction welding between the multiple outer frames 110 to improve the stability of the connection between the multiple outer frames 110; the two ends of the beam 120 are respectively welded to the two outer frames 110 to improve the overall strength; a third mounting hole 121 is opened at the bottom of the beam 120, and the third mounting hole 121 is arranged opposite to the first mounting hole 201 and the second mounting hole 301, so that the rivet 410 can be inserted into the third mounting hole 121 at the bottom of the heat exchange plate 200 to facilitate the installation of the rivet 410; wherein, multiple beams 120 can be provided to improve the stability of the box frame.

[0056] Among them, the first area is located at the top middle part of the bottom guard plate 300, and the second area is located at the top edge part of the bottom guard plate 300. Multiple outer frames 110 are arranged in the second area and welded to each other by friction welding to be connected as a whole to improve the stability of the connection.

[0057] The outer frame 110 is provided with a plurality of them and connected end to end in sequence; the two ends of the crossbeam 120 are connected to the two outer frames 110 respectively; Figure 4 A third mounting hole 121 is provided on the cross beam 120 , and the third mounting hole 121 is arranged opposite to the first mounting hole 201 . The rivet 410 passes through the third mounting hole 121 and is connected to the cross beam 120 .

[0058] Reference Figure 4 It can be understood that the plurality of connection components are arranged in sequence along the length direction of the cross beam 120 to further improve the stability of the connection components connecting the heat exchange plate 200 , the bottom guard plate 300 and the box frame 100 .

[0059] Specifically, a plurality of first mounting holes 201 are provided on the heat exchange plate 200, a plurality of second mounting holes 301 are provided on the bottom guard plate 300, and a plurality of third mounting holes 121 are provided on the bottom guard plate 300 and the cross beam 120. The plurality of first mounting holes 201, the second mounting holes 301 and the third mounting holes 121 are arranged in sequence along the length direction of the cross beam 120 so as to be able to cooperate with a plurality of connecting components and reduce the difficulty of installation.

[0060] The battery according to the embodiment of the utility model includes at least one battery cell and the above-mentioned battery case; the battery cell is accommodated in the battery case; specifically, the battery case is used to cover the battery cell and other electronic components inside the battery; the battery can be an on-board battery for electric vehicles and electric cars.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery box for accommodating a battery cell, characterized in that: It includes a box frame and a heat exchange plate and a bottom guard plate respectively connected to the box frame; the bottom guard plate is located at the bottom of the box frame, the heat exchange plate is located between the bottom guard plate and the box frame, and is used for exchanging heat for battery cells; at least one elastic layer is arranged between the heat exchange plate and the bottom guard plate, and the heat exchange plate and the bottom guard plate jointly clamp the elastic layer so that the elastic layer is in a compressed state.

2. The battery box according to claim 1, characterized in that: The battery box also includes a connecting component, a first mounting hole is provided on the heat exchange plate, and a second mounting hole is provided on the bottom guard plate at a position corresponding to the first mounting hole. The connecting component is simultaneously passed through the first mounting hole and the second mounting hole and connected to the box frame, and the bottom guard plate is subjected to the force of the connecting component to clamp the elastic layer together with the heat exchange plate.

3. The battery box according to claim 2, characterized in that: The connecting assembly includes a rivet and a connecting bolt, the rivet passes through the first mounting hole and is confined in the box frame, the connecting bolt is connected to the rivet and is used to drive the rivet to deform, the deformation of the rivet is used to apply a first force to the heat exchange plate in a direction away from the bottom guard plate, and make the heat exchange plate abut against the box frame; the connecting bolt also passes through the second mounting hole and applies a second force to the bottom guard plate towards the heat exchange plate, so that the bottom guard plate can clamp the elastic layer together with the heat exchange plate.

4. The battery box according to claim 3, characterized in that: The rivet comprises a connected rod body and an annular boss, a threaded hole is arranged in the rod body, the annular boss is arranged on the side of the heat exchange plate facing away from the box frame, the connecting bolt is connected to the threaded hole and drives the annular boss to deform, and the deformed annular boss applies the first force to the heat exchange plate.

5. The battery box according to claim 4, characterized in that: The connecting bolt includes a connected screw rod and a bolt head. The screw rod passes through the first mounting hole and the second mounting hole at the same time and is connected to the threaded hole. The bolt head abuts against a side of the bottom guard plate facing away from the heat exchange plate to apply the second force to the bottom guard plate.

6. The battery box according to claim 4, characterized in that: There is a gap between the bottom guard plate and the annular boss, or the bottom guard plate is abutted against the annular boss by the second force.

7. The battery case according to any one of claims 3 to 6, characterized in that: The box frame includes an outer frame and at least two cross beams connected to the outer frame and arranged at intervals, each of the cross beams is connected to a plurality of the rivets, and each of the rivets is connected to the connecting bolts, so that the bottom guard plate and the heat exchange plate are fixedly connected to the plurality of cross beams at the same time.

8. The battery case according to claim 7, characterized in that: The bottom guard plate includes a first area and a second area arranged on the periphery of the first area. The first area is connected to the plurality of beams simultaneously by the plurality of connecting bolts, and the second area is connected to the outer frame as a whole by friction welding.

9. The battery box according to claim 1, characterized in that: The elastic layer is hard PU foam or silica gel; the battery box also includes an adhesive layer, which is arranged between the elastic layer and the heat exchange plate, and the adhesive layer connects the elastic layer and the heat exchange plate.

10. A battery, characterized in that: The invention comprises at least one battery cell and a battery case as claimed in any one of claims 1 to 9, wherein the battery cell is accommodated in the battery case.

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