Battery pack box structure, battery pack and vehicle

Abstract

The utility model provides a battery pack box body structure, a battery pack and a vehicle, the battery pack box body structure comprises a main box body and an inner box body, the inner box body is arranged in the main box body, and the inner box body comprises a mounting space for mounting a battery module; a first cooling channel is arranged in the side wall of at least one side of the inner box body. According to the battery pack box body structure provided by the embodiment of the utility model, the inner box body is arranged in the main box body and comprises the mounting space for mounting the battery module, and the first cooling channel is arranged in the side wall of at least one side of the inner box body, so that the side wall of the inner box body is cooled through the cooling medium in the first cooling channel; according to the battery pack box body structure, the inner box body is provided with the mounting space, so that the side surface of the battery module in the mounting space of the inner box body is cooled, the area for cooling the battery module in the battery pack box body structure is increased, the cooling and heat dissipation efficiency of the battery module is improved, and the risk of thermal runaway caused by over-high temperature of the battery module is reduced.

Description

Technical Field

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

[0002] In the related art, the battery module of the battery pack is installed in the main box, and the battery module is cooled and dissipated through the bottom plate of the main box. Since the bottom plate is only in contact with the bottom of the battery module, the heat dissipation area of ​​the battery module is small, the heat dissipation efficiency is low, and the temperature of the battery module is prone to be too high, which in turn causes the risk of thermal runaway. Utility Model Content

[0003] The embodiments of the utility model provide a battery pack box structure, a battery pack and a vehicle, which can improve the technical problem that the heat dissipation efficiency of the bottom plate of the main box of the battery pack to the battery module is low, and the temperature of the battery module is easily too high, thereby causing thermal runaway.

[0004] In a first aspect, an embodiment of the present utility model provides a battery pack box structure, comprising:

[0005] main box;

[0006] The inner box is arranged in the main box, and the inner box includes an installation space for installing the battery module; wherein a first cooling channel is arranged in at least one side wall of the inner box.

[0007] In one embodiment, the main box body includes a bottom plate; the inner box body includes a baffle and at least two side plates, the at least two side plates are sequentially distributed along the thickness direction of the side plates, the baffle is connected to the same side edge of the at least two side plates, the baffle and two adjacent side plates enclose the installation space, and the at least two side plates and the baffle are respectively connected to one side plate surface of the bottom plate and are arranged at an angle;

[0008] Wherein, the first cooling channel is provided in the side plate and / or the baffle.

[0009] In one embodiment, the inner box includes three side plates, and the three side plates are sequentially spaced apart along the thickness direction of the side plates; and the first cooling channel is provided in each of the side plates.

[0010] In one embodiment, a second cooling channel is provided in the bottom plate, and the second cooling channel is communicated with the first cooling channel.

[0011] In one embodiment, the first cooling channel includes an inlet and an outlet, the inlet and the outlet are respectively connected to the second cooling channel, and the inlet and the outlet are sequentially distributed along the flow direction of the cooling medium in the second cooling channel.

[0012] In one embodiment, the inlet located at the side plate and the inlet located at the baffle are sequentially distributed along the flow direction of the cooling medium in the second cooling channel; and / or,

[0013] The outlet located at the side plate and the inlet located at the baffle are distributed in sequence along the flow direction of the cooling medium in the second cooling channel.

[0014] In one embodiment, the second cooling channel includes a plurality of cooling sections connected in sequence, the cooling sections extend along the distribution direction of the plurality of side plates, and the plurality of cooling sections are distributed in sequence along the length direction of the edge of one side of the side plate close to the bottom plate; the inlets located at the plurality of side plates are connected to the same cooling section, and the outlets located at the plurality of side plates are connected to another identical cooling section; the inlet and the outlet located at the baffle are connected to the same cooling section.

[0015] In one embodiment, a heat-conducting layer is provided on the inner surface of the installation space, and the heat-conducting layer is used to abut against the surface of the battery module.

[0016] In a second aspect, an embodiment of the utility model further provides a battery pack, comprising:

[0017] A battery pack box structure, wherein the battery pack box structure is the battery pack box structure as described above, wherein the battery pack box structure comprises a main box and an inner box, wherein the inner box is disposed in the main box, and wherein the inner box comprises an installation space for installing a battery module; wherein a first cooling channel is disposed in at least one side wall of the inner box;

[0018] A battery module is fixedly installed in the installation space of the inner box of the battery pack box structure.

[0019] In a third aspect, the utility model further provides a vehicle, comprising the battery pack as described above.

[0020] Beneficial effects of the embodiments of the utility model:

[0021] In the battery pack case structure of the utility model, an inner case is arranged in the main case, so that the inner case includes an installation space for installing the battery module, and a first cooling channel is provided in the side wall of at least one side of the inner case. After the battery module is installed in the installation space of the inner case, the battery module can be buffered by the inner case, at least to a certain extent, reducing the risk of minor damage to the internal structure of the battery module caused by vibration and impact on the battery pack, or even causing the connection of the battery module to become loose or damaged. Moreover, the cooling medium in the first cooling channel can also be used to cool the side wall of the inner case, and then cool the side of the battery module in the installation space of the inner case, thereby increasing the area for cooling the battery module in the battery pack case structure, which is beneficial to improving the cooling and heat dissipation efficiency of the battery module and reducing the risk of excessive temperature of the battery module, thereby causing thermal runaway.

[0022] The battery pack and vehicle provided by the embodiment of the utility model are characterized in that the inner box of the battery pack box structure is arranged in the main box, so that the inner box includes an installation space for installing the battery module, and a first cooling channel is provided in the side wall of at least one side of the inner box. After the battery module is installed in the installation space of the inner box, the battery module can be buffered by the inner box, at least to a certain extent, reducing the risk of minor damage to the internal structure of the battery module caused by vibration and impact on the battery pack, or even causing the connection of the battery module to become loose or damaged. Moreover, the cooling medium in the first cooling channel can also be used to cool the side wall of the inner box, and then cool the side of the battery module in the installation space of the inner box, thereby increasing the area for cooling the battery module in the battery pack box structure, which is conducive to improving the cooling and heat dissipation efficiency of the battery module, reducing the risk of thermal runaway caused by excessive temperature of the battery module, and improving the safety performance of the battery pack and the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below 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 work.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack provided by an embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the internal structure of an embodiment of a battery pack provided by an embodiment of the utility model;

[0026] Figure 3 It is a top view of an embodiment of the inner box provided by the embodiment of the utility model;

[0027] Figure 4 yes Figure 3 The cross-sectional view along the AA direction;

[0028] Figure 5 yes Figure 3 The cross-sectional view along the BB direction;

[0029] Figure 6 This is another angle view of an embodiment of the inner box provided by the embodiment of the utility model;

[0030] Figure 7 yes Figure 6 Cross-sectional view along CC direction.

[0031] Battery pack 100; battery pack box structure 110; main box 111; bottom plate 1111; second cooling channel 1112; cooling section 1113; outer shell 1114; inner box 112; installation space 1121; baffle 1122; side plate 1123; first cooling channel 1124; inlet 1125; outlet 1126; stopper 1127; battery module 120 battery cell 121; end plate 122. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0033] In the related art, the battery module of the battery pack is installed in the main box, and the battery module is cooled and dissipated through the bottom plate of the main box. Since the bottom plate is only in contact with the bottom of the battery module, the heat dissipation area of ​​the battery module is small, the heat dissipation efficiency is low, and the temperature of the battery module is prone to be too high, which in turn causes the risk of thermal runaway.

[0034] In addition, there is a gap between the battery module and the inner wall of the main box. During the use or movement of the battery pack, the vibration and impact applied to the battery pack may cause minor damage to the internal structure of the battery module, causing the connection of the battery module to loosen or be damaged, thereby gradually reducing the energy storage efficiency and cycle life of the battery pack, and may even cause safety accidents in severe cases.

[0035] In order to avoid the above problems, an embodiment of the utility model provides a battery pack box structure, a battery pack and a vehicle.

[0036] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack provided by an embodiment of the utility model. Figure 2 Schematic diagram of the internal structure of a battery pack according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the battery pack 100 includes a battery pack case structure 110 and a battery module 120 . The battery pack case structure 110 includes a main case 111 , and the battery module 120 is installed in the main case 111 .

[0037] The main box body 111 of the battery pack box structure 110 may include a bottom plate 1111 and a shell 1114, and the shell 1114 is covered on a side plate 1123 of the bottom plate 1111, so that the shell 1114 and the bottom plate 1111 are enclosed to form a space for accommodating the battery module 120. The bottom plate 1111 may be a cooling plate for cooling the battery module 120, so that the temperature of the battery module 120 is reduced through the bottom plate 1111.

[0038] In some embodiments, Figure 2 and Figure 3 As shown, the battery pack box structure 110 may include an inner box 112, which is disposed in the main box 111, and the inner box 112 includes an installation space 1121 for installing the battery module 120. After the battery module 120 is installed in the installation space 1121 of the inner box 112, the battery module 120 may be buffered by the inner box 112, thereby at least to some extent reducing the risk of minor damage to the internal structure of the battery module 120 caused by vibration and impact on the battery pack 100, or even causing the risk of loose connection or damage to the battery module 120.

[0039] Among them, Figure 4 and Figure 5As shown, a first cooling channel 1124 is provided in the side wall of at least one side of the inner box 112. Thus, the cooling medium in the first cooling channel 1124 can cool the side wall of the inner box 112, and then cool the side of the battery module 120 in the installation space 1121 of the inner box 112, thereby increasing the area for cooling the battery module 120 in the battery pack box structure 110, which is beneficial to improving the cooling and heat dissipation efficiency of the battery module 120, and reducing the risk of excessive temperature of the battery module 120, thereby causing thermal runaway.

[0040] like Figures 3 to 5 As shown, the inner box 112 includes a baffle 1122 and at least two side panels 1123, the at least two side panels 1123 are sequentially distributed along the thickness direction of the side panels 1123, the baffle 1122 is connected to the same side of the at least two side panels 1123, the baffle 1122 and the two adjacent side panels 1123 enclose an installation space 1121, and the at least two side panels 1123 and the baffle 1122 are respectively connected to the side panel 1123 surface of the bottom plate 1111 and are arranged at an angle. The baffle 1122 and the side panels 1123 can buffer and limit the battery module 120 in the installation space 1121 in multiple directions, which can further improve the buffering and limiting effects on the battery module 120.

[0041] Among them, a first cooling channel 1124 may be provided in the side plate 1123. Alternatively, a first cooling channel 1124 may also be provided in the baffle 1122. In addition, the first cooling channel 1124 may also be provided in both the side plate 1123 and the baffle 1122. Of course, the latter can further increase the heat dissipation area of ​​the battery module 120 and improve the heat dissipation efficiency of the inner box 112 to the battery module 120.

[0042] It should be noted that the number of side panels 1123 included in the inner box 112 may be two, three or more, which may be determined according to the number of battery modules 120 of the battery pack 100. For example, the battery pack 100 includes two battery modules 120. Then the inner box 112 of the battery pack box structure 110 may include three side panels 1123, and the three side panels 1123 are distributed in sequence along the thickness direction of the side panels 1123. The baffle 1122 is connected to the same side panel 1123 of the three side panels 1123, so that the baffle 1122 and the three side panels 1123 enclose two installation spaces 1121 for installing the two battery modules 120 of the battery pack 100. The two installation spaces 1121 are distributed in sequence along the thickness direction of the side panels 1123 and are separated by the middle side panel 1123.

[0043] A first cooling channel 1124 may be provided in each side plate 1123 to further improve the heat dissipation efficiency of the battery module 120 .

[0044] In some embodiments, a heat-conducting layer (not shown) may be provided on the inner surface of the installation space 1121 of the inner box 112, and the heat-conducting layer is used to abut against the surface of the battery module 120. When the battery module 120 is installed in the installation space 1121 of the inner box 112, the heat-conducting layer provided on the inner surface of the installation space 1121 can abut against the battery module 120, thereby quickly transferring the heat generated by the battery module 120 to the inner box 112, which is beneficial to improving the heat dissipation and cooling effect on the side of the battery module 120. The material of the heat-conducting layer may be a heat-conducting gel or other heat-conducting materials.

[0045] In some embodiments, Figure 2 As shown, the inner box 112 may further include a stopper 1127, which is located on a side of the side plate 1123 away from the baffle 1122, and the stopper 1127 can be detachably connected to the side plate 1123. The stopper 1127 and the baffle 1122 are distributed on both sides of the installation space 1121, and the stopper 1127 is used to abut against the battery module 120 in the installation space 1121 to limit the battery module 120 between the stopper 1127 and the baffle 1122.

[0046] Of course, the limiting member 1127 may also be detachably connected to the bottom plate 1111 , as long as the position of the limiting member 1127 can be kept stable and the battery module 120 can be limited within the installation space 1121 .

[0047] During the assembly process of the battery pack 100, the steel strip can be placed in the empty module fixture and positioned and stacked in sequence on the work surface in the order of end plate 122, insulating sheet, battery cell 121...battery cell 121, insulating sheet, end plate 122, so that each battery cell 121 is close to the tooling to remain flush, and glue is applied between the battery cells 121 to further fix them; then, the steel strip is installed on the stacked battery cell group using the tooling to form a battery module 120.

[0048] Afterwards, the battery module 120 is installed into the installation space 1121 from the side of the installation space 1121 away from the baffle 1122, and the baffle 1122 is located on the side of the arrangement direction of the multiple battery cells 121 of the battery module 120. Of course, the battery module 120 can also be installed into the installation space 1121 from the side of the installation space 1121 away from the bottom plate 1111. The side plate 1123 of the inner box 112 can limit the movement of the battery module 120 in the thickness direction of the side plate 1123, so that the battery module 120 is stably limited in the inner box 112, which is conducive to further improving the buffering and vibration reduction effects of the battery module 120.

[0049] A heat-conducting layer (not shown) may be provided on the inner surface of the installation space 1121 of the inner box 112 in advance. When the battery module 120 is installed in the installation space 1121 of the inner box 112, the heat-conducting gel abuts against the surface of the battery module 120, and can quickly transfer the heat of the battery module 120 to the inner box 112, thereby improving the heat dissipation and cooling efficiency of the inner box 112 on the battery module 120.

[0050] Afterwards, the limiting member 1127 is fixedly connected to the side plate 1123 or the bottom plate 1111, so that the limiting member 1127 and the baffle 1122 together limit the battery module 120 in the installation space 1121, and prevent the battery module 120 from moving along the distribution direction of the limiting member 1127 and the baffle 1122 in the installation space 1121. The limiting member 1127 can be fixedly connected to the side plate 1123 or the bottom plate 1111 by screw fixing, clamping or other methods, which are not limited at this time.

[0051] Finally, the outer shell 1114 is covered on a side plate 1123 of the bottom plate 1111 , so that the battery module 120 and the inner box 112 are accommodated in the main box 111 formed by the bottom plate 1111 and the outer shell 1114 .

[0052] In some embodiments, Figures 4 to 7 As shown, a second cooling channel 1112 may be provided in the bottom plate 1111, so that the bottom plate 1111 becomes a cooling plate capable of cooling the battery module 120. The second cooling channel 1112 of the bottom plate 1111 may be connected to the first cooling channel 1124 of the side plate 1123 and / or the baffle 1122. Thus, the cooling medium of the second cooling channel 1112 in the bottom plate 1111 can enter the first cooling channel 1124 of the side plate 1123 and / or the baffle 1122, so that the side plate 1123 and / or the baffle 1122 can cool the battery module 120 from the side of the battery module 120.

[0053] In some embodiments, the first cooling channel 1124 in the side plate 1123 or the baffle 1122 can include an inlet 1125 and an outlet 1126, and the inlet 1125 and the outlet 1126 of the first cooling channel 1124 are respectively connected to the second cooling channel 1112, and the inlet 1125 and the outlet 1126 of the first cooling channel 1124 are distributed in sequence along the flow direction of the cooling medium in the second cooling channel 1112, so that the inlet 1125 of the first cooling channel 1124 is located upstream of the outlet 1126. As a result, a portion of the cooling medium in the second cooling channel 1112 can enter the first cooling channel 1124 of the side plate 1123 or the baffle 1122 from the inlet 1125 of the first cooling channel 1124, and flow back to the second cooling channel 1112 from the outlet 1126 of the first cooling channel 1124, without the need for additional pipelines to provide cooling medium to the first cooling channel 1124 of the side plate 1123 or the baffle 1122, which is beneficial to simplify the structure of the battery pack box structure 110.

[0054] In some embodiments, the inlet 1125 located on the side plate 1123 and the inlet 1125 located on the baffle 1122 may be distributed in sequence along the flow direction of the cooling medium in the second cooling channel 1112 .

[0055] It is understandable that, during the use of the battery pack 100, the heat generated by the surface of the battery module 120 opposite to the side plate 1123 is generally higher than the heat generated by the surface opposite to the baffle 1122, so the side plate 1123 needs to have a faster cooling and heat dissipation efficiency. The temperature of the cooling medium in the second cooling channel 1112 will gradually increase along the flow direction of the cooling medium.

[0056] The embodiment of the utility model enables the inlet 1125 located on the side plate 1123 and the inlet 1125 located on the baffle 1122 to be distributed in sequence along the flow direction of the cooling medium in the second cooling channel 1112, so that the cooling medium with a lower temperature in the second cooling channel 1112 first enters the first cooling channel 1124 of the side plate 1123 from the inlet 1125 of the side plate 1123, while the cooling medium with a relatively higher temperature in the second cooling channel 1112 enters the first cooling channel 1124 of the baffle 1122 from the inlet 1125 of the baffle 1122, thereby making the side plate 1123 have a better heat dissipation effect relative to the baffle 1122, which is beneficial for the inner box 112 to improve the overall heat dissipation efficiency of the battery module 120.

[0057] The outlet 1126 at the side plate 1123 and the inlet 1125 at the baffle 1122 can be sequentially distributed along the flow direction of the cooling medium in the second cooling channel 1112. Thus, the temperature difference between the cooling medium entering the first cooling channel 1124 of the side plate 1123 and the cooling medium entering the first cooling channel 1124 of the baffle 1122 can be reduced, thereby further improving the overall heat dissipation efficiency of the inner box 112 to the battery module 120.

[0058] In some embodiments, the second cooling channel 1112 of the bottom plate 1111 may include a plurality of cooling segments 1113 connected in sequence, the plurality of cooling segments 1113 extend along the distribution direction of the plurality of side plates 1123, and the plurality of cooling segments 1113 are distributed in sequence along the length direction of the edge of one side of the side plate 1123 close to the bottom plate 1111. Among them, the inlets 1125 located at the plurality of side plates 1123 may be connected to the same cooling segment 1113, the outlets 1126 located at the plurality of side plates 1123 may be connected to another identical cooling segment 1113, and the inlets 1125 and outlets 1126 located at the baffle 1122 may be connected to the same cooling segment 1113.

[0059] Therefore, the entrances 1125 of the first cooling channels 1124 in the multiple side plates 1123 are closer in the flow direction of the cooling medium in the second cooling channel 1112, so that the temperature of the cooling medium entering the first cooling channels 1124 of the multiple side plates 1123 is basically the same, so that the cooling efficiency of the multiple side plates 1123 for the battery module 120 is basically the same, which is beneficial to improving the overall cooling efficiency of the battery module 120.

[0060] An embodiment of the utility model further provides a battery pack, which includes a battery pack case structure. The specific structure of the battery pack case structure refers to the various embodiments of the above-mentioned battery pack case structure. Since the battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0061] The battery pack 100 includes a battery pack box structure 110 and a battery module 120, and the battery module 120 is fixedly installed in the installation space 1121 of the inner box 112 of the battery pack box structure 110. The structures of the battery pack box structure 110 and the battery module 120 can refer to the above embodiments and will not be repeated here.

[0062] In addition, an embodiment of the utility model also provides a vehicle, which includes a battery pack. The specific structure of the battery pack refers to the various embodiments of the above-mentioned battery pack. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0063] The battery pack 100 and the vehicle provided by the embodiment of the utility model are such that the inner box 112 of the battery pack box structure 110 is arranged in the main box 111, so that the inner box 112 includes an installation space 1121 for installing the battery module 120, and a first cooling channel 1124 is provided in the side wall of at least one side of the inner box 112. After the battery module 120 is installed in the installation space 1121 of the inner box 112, the battery module 120 can be buffered by the inner box 112, at least to a certain extent, reducing the risk of minor damage to the internal structure of the battery module 120 caused by vibration and impact on the battery pack 100, or even causing the connection of the battery module 120 to become loose or damaged. Moreover, the side walls of the inner box 112 can be cooled by the cooling medium in the first cooling channel 1124, and then the sides of the battery module 120 in the installation space 1121 of the inner box 112 can be cooled, thereby increasing the area for cooling the battery module 120 in the battery pack box structure 110, which is beneficial to improving the cooling and heat dissipation efficiency of the battery module 120, reducing the risk of thermal runaway caused by excessive temperature of the battery module 120, and improving the safety performance of the battery pack 100 and the vehicle.

[0064] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack box structure, characterized in that: include: main box; The inner box is arranged in the main box, and the inner box includes an installation space for installing the battery module; wherein a first cooling channel is arranged in at least one side wall of the inner box.

2. The battery pack box structure according to claim 1, characterized in that: The main box body includes a bottom plate; the inner box body includes a baffle and at least two side plates, the at least two side plates are sequentially distributed along the thickness direction of the side plates, the baffle is connected to the same side of the at least two side plates, the baffle and two adjacent side plates enclose the installation space, and the at least two side plates and the baffle are respectively connected to one side plate surface of the bottom plate and are arranged at an angle; Wherein, the first cooling channel is provided in the side plate and / or the baffle.

3. The battery pack box structure according to claim 2, characterized in that: The inner box body includes three side plates, which are spaced apart in sequence along the thickness direction of the side plates; each of the side plates is provided with the first cooling channel.

4. The battery pack box structure according to claim 2, characterized in that: A second cooling channel is provided in the bottom plate, and the second cooling channel is communicated with the first cooling channel.

5. The battery pack box structure according to claim 4, characterized in that: The inlet and the outlet of the first cooling channel are respectively communicated with the second cooling channel, and the inlet and the outlet are sequentially distributed along the flow direction of the cooling medium in the second cooling channel.

6. The battery pack box structure according to claim 5, characterized in that: The inlet located at the side plate and the inlet located at the baffle are sequentially distributed along the flow direction of the cooling medium in the second cooling channel; and / or, The outlet located at the side plate and the inlet located at the baffle are distributed in sequence along the flow direction of the cooling medium in the second cooling channel.

7. The battery pack box structure according to claim 5, characterized in that: The second cooling channel includes a plurality of cooling sections connected in sequence, the cooling sections extend along the distribution direction of the plurality of side plates, and the plurality of cooling sections are distributed in sequence along the length direction of the edge of one side of the side plate close to the bottom plate; the inlets located at the plurality of side plates are connected to the same cooling section, and the outlets located at the plurality of side plates are connected to another identical cooling section; the inlet and the outlet located at the baffle are connected to the same cooling section.

8. The battery pack box structure according to any one of claims 1 to 7, characterized in that: A heat-conducting layer is provided on the inner surface of the installation space, and the heat-conducting layer is used to abut against the surface of the battery module.

9. A battery pack, characterized in that: include: A battery pack box structure, wherein the battery pack box structure is the battery pack box structure according to any one of claims 1 to 8; A battery module is fixedly installed in the installation space of the inner box of the battery pack box structure.

10. A vehicle, characterized in that: The vehicle includes the battery pack according to claim 9.

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