Battery box and battery module

Abstract

The utility model provides a battery box body and a battery module, the battery box body comprises a bottom plate and an edge beam assembly, and at least one first liquid cooling flow channel is arranged in the bottom plate; the boundary beam assembly comprises a first boundary beam and a plurality of second boundary beams, and a battery management system is arranged on the first boundary beam; wherein the first boundary beam is further provided with an air cooling system, and at least one of the multiple second boundary beams is internally provided with a second liquid cooling flow channel; in the technical scheme provided by the utility model, the first liquid cooling flow channel arranged on the bottom plate and the second liquid cooling flow channel arranged on the second edge beam are used for carrying out liquid cooling heat dissipation on the battery core assembly in the battery module, and the first liquid cooling flow channel and the second liquid cooling flow channel are arranged on the bottom plate and the second edge beam; and the interference with the battery management system arranged on the first boundary beam is avoided, so that the influence on the maintenance of the battery management system can be avoided.

Description

Technical Field

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

[0002] In the related art, battery modules mostly use liquid cooling to dissipate heat, that is, liquid cooling pipelines are arranged in the battery case, and the heat around the battery cells is taken away by the flowing coolant, thereby achieving heat dissipation of the battery cell components in the battery module; since a battery management system (Battery Management System, BMS) needs to be installed on the battery case, setting liquid cooling pipelines on the panel on which the battery management system is installed in the battery case will interfere with the maintenance of the battery management system, thereby affecting the maintenance of the battery management system. Utility Model Content

[0003] The embodiments of the utility model provide a battery box and a battery module, which can improve the technical problem in the related art that the liquid cooling channel provided on the battery box to ensure the heat dissipation effect of the battery module will affect the maintenance of the battery management system.

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

[0005] A bottom plate, wherein at least one first liquid cooling channel is disposed in the bottom plate; and

[0006] A side beam assembly, comprising a first side beam and a plurality of second side beams, the plurality of second side beams are sequentially connected, the first side beam and the sequentially connected second side beams are connected end to end, the first side beam and the plurality of second side beams are arranged around the periphery of the bottom plate to form a receiving cavity, the receiving cavity is configured to receive the battery cell assembly, and a battery management system is arranged on the first side beam;

[0007] Among them, an air cooling system is also arranged on the first side beam, and a second liquid cooling channel is arranged in at least one of the plurality of second side beams.

[0008] In one embodiment, a second liquid cooling channel is disposed in each of the plurality of second side beams, and the plurality of second liquid cooling channels are connected in sequence;

[0009] Wherein, the first liquid cooling channel is connected to one of the second liquid cooling channels.

[0010] In one embodiment, the battery box is further provided with a liquid inlet and a liquid outlet;

[0011] One of the liquid inlet and the liquid outlet is communicated with the first liquid cooling channel, and the other one is communicated with the second liquid cooling channel.

[0012] In one embodiment, the liquid inlet and the liquid outlet are both arranged on the bottom plate, and a liquid cooling pipe section is further arranged in the bottom plate, one end of the liquid cooling pipe section is connected to the liquid inlet, the other end of the liquid cooling pipe section is connected to the second liquid cooling channel, and the first liquid cooling channel is connected to the liquid outlet; or

[0013] The liquid inlet and the liquid outlet are both arranged on the bottom plate. A liquid cooling pipe section is also arranged inside the bottom plate. One end of the liquid cooling pipe section is connected to the liquid outlet, and the other end of the liquid cooling pipe section is connected to the second liquid cooling channel. The first liquid cooling channel is connected to the liquid inlet.

[0014] In one embodiment, the liquid inlet and the liquid outlet are located at the same end of the bottom plate.

[0015] In one embodiment, at least one connecting pipe section located on one side of the first liquid cooling channel is further provided in the bottom plate;

[0016] The two ends of the connecting pipe section are respectively connected to the second liquid cooling channels in the two adjacent second side beams.

[0017] In one embodiment, at least a portion of the connecting pipe section is arranged in an arc shape.

[0018] In one embodiment, the cross-section of the first liquid-cooling channel is polygonal or circular; and / or

[0019] The cross section of the second liquid cooling channel is polygonal or circular.

[0020] In one embodiment, at least one mounting hole is provided on the first side beam, and the mounting hole is provided through the first side beam;

[0021] The air cooling system includes at least one fan, and the fan is correspondingly arranged in the mounting hole.

[0022] In a second aspect, an embodiment of the present utility model provides a battery module, comprising:

[0023] A battery box, comprising the battery box as described above, wherein the battery box further comprises a top plate, the top plate is arranged opposite to the bottom plate and covers the accommodating cavity, and the first side beam and the second side beams are arranged around the top plate at one end away from the bottom plate; and

[0024] The battery cell assembly is arranged in the accommodating cavity of the battery box.

[0025] Beneficial effects of the embodiments of the utility model:

[0026] In the technical solution of the utility model, liquid cooling is performed on the battery cell components in the battery module through a first liquid cooling channel arranged on the bottom plate and a second liquid cooling channel arranged on the second side beam, and the first liquid cooling channel and the second liquid cooling channel are arranged on the bottom plate and the second side beam, and do not interfere with the battery management system arranged on the first side beam, thereby avoiding affecting the maintenance of the battery management system; at the same time, an air cooling system is also arranged on the first side beam where the battery management system is arranged, so as to ensure the heat dissipation effect of the battery cell components. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 It is a three-dimensional schematic diagram of a battery module provided by an embodiment of the utility model;

[0029] Figure 2 It is a three-dimensional schematic diagram of a battery module provided by an embodiment of the utility model without a top plate;

[0030] Figure 3 It is a schematic diagram of the connection relationship between the first liquid cooling pipeline and the second liquid cooling pipeline of the battery box provided by an embodiment of the utility model;

[0031] Figure 4 It is a schematic diagram of the connection relationship between the first liquid cooling pipeline and the second liquid cooling pipeline in another perspective of the battery box provided by an embodiment of the utility model;

[0032] Figure 5 is a cross-sectional schematic diagram of a battery module provided by an embodiment of the utility model;

[0033] Figure 6 It is a cross-sectional schematic diagram of a battery module provided by an embodiment of the utility model from another perspective.

[0034] Reference numerals:

[0035] 1. Bottom plate; 2. First liquid-cooling channel; 21. Second sub-channel; 22. Second curved channel; 3. Side beam assembly; 31. First side beam; 32. Second side beam; 4. Accommodation cavity; 5. Battery management system; 6. Air cooling system; 61. Fan; 7. Second liquid-cooling channel; 71. First sub-channel; 72. First curved channel; 8. Liquid inlet; 9. Liquid outlet; 10. Liquid cooling pipe section; 11. Connecting pipe section; 12. Top plate; 13. Battery cell assembly; 131. Battery cell; 14. Mounting hole. DETAILED DESCRIPTION

[0036] 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.

[0037] The utility model provides a battery box. Figures 1 to 6 These are some embodiments of the present invention.

[0038] See also Figure 1 to Figure 2 In some embodiments of the present application, the battery box includes a bottom plate 1 and a side beam assembly 3, the side beam assembly 3 includes a first side beam 31 and a plurality of second side beams 32, the plurality of second side beams 32 are connected in sequence, the first side beam 31 and the second side beams 32 connected in sequence are connected end to end, the first side beam 31 and the plurality of second side beams 32 are arranged on the peripheral side of the bottom plate 1 and form a receiving cavity 4, the receiving cavity 4 is configured to receive the battery cell assembly 13; that is, the bottom plate 1, the first side beam 31 and the plurality of second side beams 32 jointly define the receiving cavity 4 for receiving the battery cell assembly 13; wherein, a battery management system 5 (Battery Management System, BMS) is arranged on the first side beam 31.

[0039] In some embodiments, at least one first liquid cooling channel 2 is disposed in the base plate 1, and the first liquid cooling channel 2 can dissipate heat on the side of the battery cell assembly 13 close to the base plate 1; there is no limit on the number of first liquid cooling channels 2, which can be one or more.

[0040] In some embodiments, a second liquid cooling channel 7 is further provided in at least one of the plurality of second side beams 32, and the second liquid cooling channel 7 can dissipate heat to a side of the battery cell assembly 13 close to the second side beam 32; the number of second liquid cooling channels 7 is also not limited, and can be one or more.

[0041] Furthermore, in some embodiments, an air cooling system 6 is also provided on the first side beam 31 , and the air cooling system 6 can dissipate heat from a side of the battery cell assembly 13 close to the first side beam 31 .

[0042] In the technical solution of the utility model, liquid cooling is performed on the battery cell assembly 13 in the battery module through the first liquid cooling channel 2 arranged on the base plate 1 and the second liquid cooling channel 7 arranged on the second side beam 32, and the first liquid cooling channel 2 and the second liquid cooling channel 7 are arranged on the base plate 1 and the second side beam 32, and do not interfere with the battery management system 5 arranged on the first side beam 31, thereby avoiding affecting the maintenance of the battery management system 5; at the same time, an air cooling system 6 is also arranged on the first side beam 31 where the battery management system 5 is arranged, so as to ensure the heat dissipation effect of the battery cell assembly 13.

[0043] In some embodiments of the present application, at least one mounting hole 14 is provided on the first side beam 31, and the mounting hole 14 passes through the first side beam 31; the air cooling system 6 includes at least one fan 61, and the fan 61 is correspondingly arranged in the mounting hole 14; the fan 61 can realize heat exchange between the internal environment of the accommodating chamber 4 and the external environment of the battery box, thereby realizing the heat dissipation function of the battery cell assembly 13; in one embodiment of the present application, the air outlet direction of the fan 61 is toward the accommodating chamber 4, that is, the fan 61 can blow air with a lower temperature into the accommodating chamber 4, thereby realizing the heat dissipation function of the battery cell assembly 13 located in the accommodating chamber 4; in another embodiment of the present application, the air outlet direction of the fan 61 is away from the accommodating chamber 4, that is, the fan 61 can extract the hot air in the accommodating chamber 4, thereby realizing the heat dissipation function of the battery cell assembly 13 located in the accommodating chamber 4.

[0044] In addition, the number of mounting holes 14 provided on the first side beam 31 is not limited, and may be one or more; similarly, the number of fans 61 installed in the mounting holes 14 is not limited, and may be one or more. In one embodiment of the present application, two mounting holes 14 are provided on the first side beam 31, and the two mounting holes 14 are spaced apart in the Z direction, and a fan 61 is installed in each mounting hole 14, and the two fans 61 are spaced apart from the battery management system 5 in the Y direction to avoid interference with the battery management system 5.

[0045] It should be noted that the cross-sectional shapes of the first liquid cooling channel 2 and the second liquid cooling channel 7 are not limited, and can be polygonal, circular or special-shaped structures; among which, when the cross-sectional shapes of the first liquid cooling channel 2 and the second liquid cooling channel 7 are polygonal, they can be triangles, quadrilaterals or pentagons. The cross-sectional shapes of the first liquid cooling channel 2 and the second liquid cooling channel 7 can be the same or different, and are not limited here. Please refer to Figure 3 and Figure 4 In a specific embodiment of the present application, the cross-sections of the first liquid-cooling channel 2 and the second liquid-cooling channel 7 are both rectangular; see Figure 5 and Figure 6In a specific embodiment of the present application, the cross-sections of the first liquid-cooling channel 2 and the second liquid-cooling channel 7 are both circular.

[0046] In some embodiments of the present application, the number of the second side beams 32 is not limited, and can be two or more, so as to ensure that the first side beam 31, multiple second side beams 32 and the bottom plate 1 enclose the accommodating cavity 4; in a specific embodiment of the present application, the second side beams 32 are set to three, that is, three second side beams 32, one first side beam 31 and the bottom plate 1 enclose a rectangular battery box. In a specific embodiment of the present application, two of the three second side beams 32 are arranged opposite to each other in the Y direction, and the remaining one of the three second side beams 32 is arranged opposite to the first side beam 31 in the X direction.

[0047] Furthermore, in some embodiments of the present application, a second liquid cooling channel 7 may be provided in any second side beam 32 . To ensure the heat dissipation effect of the battery box on the battery cell assembly 13 , a second liquid cooling channel 7 is provided on multiple second side beams 32 .

[0048] On the basis of the above, the flow channel structure of the second liquid-cooling flow channel 7 in the two second side beams 32 relatively arranged in the Y direction is as follows: the second liquid-cooling flow channel 7 includes a plurality of first sub-flow channels 71 spaced apart in the X direction and a first curved flow channel 72 connecting two adjacent first sub-flow channels 71; wherein, the first sub-flow channel 71 is extended along the Z direction, and at least a portion of the first curved flow channel 72 is arranged in an arc shape to reduce the flow resistance of the coolant flowing in the first curved flow channel 72.

[0049] The flow channel structure of the second liquid-cooling flow channel 7 in the second side beam 32 opposite to the first side beam 31 in the X direction is as follows: the second liquid-cooling flow channel 7 includes a plurality of first sub-flow channels 71 spaced apart in the Y direction and a first curved flow channel 72 connecting two adjacent first sub-flow channels 71; wherein the first sub-flow channels 71 extend along the Z direction, and at least a portion of the first curved flow channel 72 is arranged in an arc shape to reduce the flow resistance of the coolant flowing in the first curved flow channel 72.

[0050] In addition, the flow channel structure of the first liquid-cooling flow channel 2 in the base plate 1 is as follows: the first liquid-cooling flow channel 2 includes a plurality of second sub-flow channels 21 spaced apart in the Y direction and a second curved flow channel 22 connecting two adjacent second sub-flow channels 21; wherein, the second sub-flow channels 21 are extended along the X direction, and at least a portion of the second curved flow channel 22 is arranged in an arc shape to reduce the flow resistance of the coolant flowing in the second curved flow channel 22.

[0051] In one embodiment of the present application, the second liquid-cooling channels 7 located on different second side beams 32 are spaced apart from each other; in another embodiment of the present application, the second liquid-cooling channels 7 located on different second side beams 32 are interconnected.

[0052] In a specific embodiment of the present application, a plurality of second liquid cooling channels 7 are connected in sequence, wherein the first liquid cooling channel 2 is connected to one of the second liquid cooling channels 7. That is, such an arrangement makes the liquid cooling circuit in the battery case an integral circuit, and a liquid inlet 8 and a liquid outlet 9 are provided in the battery case, which can satisfy the circulation of the cooling liquid in the battery case.

[0053] Further, in some embodiments of the present application, one of the liquid inlet 8 and the liquid outlet 9 is communicated with the first liquid-cooling channel 2 , and the other one is communicated with the second liquid-cooling channel 7 .

[0054] In one embodiment of the present application, the liquid inlet 8 is connected to the second liquid cooling channel 7, the liquid outlet 9 is connected to the first liquid cooling channel 2, and the flow path of the coolant in the battery case is as follows: liquid inlet 8-a second liquid cooling channel 7 in a second side beam 32-a second liquid cooling channel 7 in another second side beam 32-a second liquid cooling channel 7 in another second side beam 32-the first liquid cooling channel 2 on the bottom plate 1-liquid outlet 9.

[0055] In another embodiment of the present application, the liquid inlet 8 is connected to the first liquid cooling channel 2, the liquid outlet 9 is connected to the second liquid cooling channel 7, and the flow path of the coolant in the battery case is as follows: liquid inlet 8-first liquid cooling channel 2 on the bottom plate 1-second liquid cooling channel 7 in a second side beam 32-second liquid cooling channel 7 in another second side beam 32-second liquid cooling channel 7 in another second side beam 32-liquid outlet 9.

[0056] In a specific embodiment of the present application, the liquid inlet 8 is connected to the first liquid cooling channel 2, and the liquid outlet 9 is connected to the second liquid cooling channel 7 on a second side beam 32. This arrangement is because the area of ​​the bottom plate 1 is larger than that of the first side beam 31 and the second side beam 32, and has a larger heat exchange area. The liquid inlet 8 is connected to the first liquid cooling channel 2, and the bottom of the battery cell assembly 13 can be preferentially liquid-cooled to dissipate heat, thereby improving the performance of the battery module.

[0057] In addition, in some embodiments of the present application, the liquid inlet 8 and the liquid outlet 9 are both arranged on the bottom plate 1; such an arrangement ensures that there is no height difference between the liquid inlet 8 and the liquid outlet 9 in the Z direction, thereby facilitating the assembly of the battery module.

[0058] In some embodiments of the present application, the liquid inlet 8 and the liquid outlet 9 are also located at the same end of the bottom plate 1. Such an arrangement enables the liquid inlet 8 and the liquid outlet 9 to be located at the same position of the bottom plate 1, thereby facilitating the assembly of the battery module.

[0059] It can be understood that since the liquid inlet 8 and the liquid outlet 9 are both arranged on the base plate 1, and the second liquid cooling channel 7 is located on the second side beam 32, in order to connect the second liquid cooling channel 7 with the liquid inlet 8 and the liquid outlet 9, in some embodiments of the present application, a liquid cooling pipe section 10 is also provided in the base plate 1, one end of the liquid cooling pipe section 10 is connected to the liquid inlet 8, and the other end of the liquid cooling pipe section 10 is connected to the second liquid cooling channel 7, and the first liquid cooling channel 2 is connected to the liquid outlet 9, that is, a liquid cooling pipe section 10 is formed in the base plate 1 to realize the connection between the second liquid cooling channel 7 and the liquid inlet 8; since the liquid cooling pipe section 10 is arranged in the base plate 1, the liquid cooling pipe section 10 will not occupy the space in the accommodating cavity 4, thereby improving the space utilization rate in the accommodating cavity 4.

[0060] In another embodiment of the present application, one end of a liquid cooling pipe section 10 arranged in the base plate 1 is connected to the liquid outlet 9, and the other end of the liquid cooling pipe section 10 is connected to the second liquid cooling channel 7, and the first liquid cooling channel 2 is connected to the liquid outlet 9, that is, a liquid cooling pipe section 10 is formed in the base plate 1 to realize the connection between the second liquid cooling channel 7 and the liquid outlet 9; since the liquid cooling pipe section 10 is arranged in the base plate 1, the liquid cooling pipe section 10 will not occupy the space in the accommodating cavity 4, thereby improving the space utilization rate in the accommodating cavity 4.

[0061] In some embodiments of the present application, at least one connecting pipe section 11 is further provided in the bottom plate 1; the connecting pipe section 11 is located on one side of the first liquid-cooling flow channel 2, and the two ends of the connecting pipe section 11 are respectively connected to the second liquid-cooling flow channels 7 in the two adjacent second side beams 32. That is, in this embodiment, the connection between the two adjacent second liquid-cooling flow channels 7 is achieved through the connecting pipe section 11; and since the connecting pipe section 11 is provided in the bottom plate 1, the connecting pipe section 11 will not occupy the space in the accommodating cavity 4, thereby improving the space utilization rate in the accommodating cavity 4.

[0062] Among them, at least a part of the connecting pipe section 11 is arranged in an arc shape; such arrangement can reduce the flow resistance of the coolant flowing in the connecting pipe section.

[0063] In some embodiments of the present application, the battery case also includes a top plate 12, which is arranged opposite to the bottom plate 1 and covers the accommodating cavity 4; wherein, the first side beam 31 and the plurality of second side beams 32 are arranged on the peripheral side of the top plate 12 at one end away from the bottom plate 1; that is, the first side beam 31 and the plurality of second side beams 32 are arranged on the peripheral side of the top plate 12 at the other end away from the bottom plate 1 in the Z direction, and the top plate 12 is a conventional plate structure, and no liquid cooling channel is provided on the top plate 12, so that it is convenient for the operator to disassemble the top plate 12, and then it is convenient for the operator to install and maintain the battery module.

[0064] In some embodiments of the present application, the base plate 1 is made of aluminum, that is, the base plate 1 can be made by an aluminum extrusion process, and the first liquid-cooling channel 2 is formed while the base plate 1 is formed.

[0065] In some embodiments of the present application, the second side beam 32 is made of aluminum, that is, the second side beam 32 can be made by an aluminum extrusion process, and the second liquid-cooling channel 7 is formed while the second side beam 32 is formed.

[0066] It can be understood that since the base plate 1 and the second side beam 32 are both made by an aluminum extrusion molding process, the first liquid cooling pipeline and the second liquid cooling pipeline are respectively located in the base plate 1 and the second side beam 32, so that they will not occupy the space in the accommodating cavity 4, thereby improving the space utilization in the accommodating cavity 4.

[0067] The utility model also proposes a battery module, which includes a battery case and a battery cell assembly 13. The battery cell assembly 13 is arranged in a receiving cavity 4 of the battery case, wherein the battery cell assembly 13 includes a plurality of battery cells 131, and the plurality of battery cells 131 are arranged in an array in the receiving cavity 4. The battery case is as described above. Since the battery module adopts all the technical solutions of all the above-mentioned embodiments, it has at least the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0068] In some embodiments of the present application, the battery box also includes a top plate 12, which is arranged opposite to the bottom plate 1 and covers the accommodating cavity 4; wherein, the first side beam 31 and the plurality of second side beams 32 are arranged at one end away from the bottom plate 1 on the surrounding side of the top plate 12; that is, the first side beam 31 and the plurality of second side beams 32 are arranged at the other end away from the bottom plate 1 in the Z direction on the surrounding side of the top plate 12, and the top plate 12 is a conventional plate structure, and no liquid cooling channel is provided on the top plate 12, so that it is convenient for the operator to disassemble the top plate 12, and then it is convenient for the operator to install and maintain the battery module.

[0069] The embodiments of the present invention are described in detail above. 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 box, characterized in that: include: A bottom plate, wherein at least one first liquid cooling channel is disposed in the bottom plate; as well as A side beam assembly, comprising a first side beam and a plurality of second side beams, the plurality of second side beams are sequentially connected, the first side beam and the sequentially connected second side beams are connected end to end, the first side beam and the plurality of second side beams are arranged around the periphery of the bottom plate to form a receiving cavity, the receiving cavity is configured to receive a battery cell assembly, and a battery management system is arranged on the first side beam; Wherein, an air cooling system is also arranged on the first side beam, and a second liquid cooling channel is arranged in at least one of the plurality of second side beams.

2. The battery box according to claim 1, characterized in that: The second liquid cooling channels are each provided in the plurality of the second side beams, and the plurality of the second liquid cooling channels are connected in sequence; Wherein, the first liquid-cooling channel is connected to one of the second liquid-cooling channels.

3. The battery box according to claim 2, characterized in that: The battery box is also provided with a liquid inlet and a liquid outlet; One of the liquid inlet and the liquid outlet is communicated with the first liquid-cooling channel, and the other one of the liquid inlet and the liquid outlet is communicated with the second liquid-cooling channel.

4. The battery box according to claim 3, characterized in that: The liquid inlet and the liquid outlet are both arranged on the bottom plate, a liquid cooling pipe section is further arranged in the bottom plate, one end of the liquid cooling pipe section is connected to the liquid inlet, the other end of the liquid cooling pipe section is connected to the second liquid cooling channel, and the first liquid cooling channel is connected to the liquid outlet; or The liquid inlet and the liquid outlet are both arranged on the bottom plate, and a liquid cooling pipe section is also arranged in the bottom plate, one end of the liquid cooling pipe section is connected to the liquid outlet, the other end of the liquid cooling pipe section is connected to the second liquid cooling channel, and the first liquid cooling channel is connected to the liquid inlet.

5. The battery box according to claim 4, characterized in that: The liquid inlet and the liquid outlet are located at the same end of the bottom plate.

6. The battery box according to claim 2, characterized in that: At least one connecting pipe section located on one side of the first liquid cooling channel is also provided in the bottom plate; Both ends of the connecting pipe section are respectively connected to the second liquid-cooling flow channels in two adjacent second side beams.

7. The battery case according to claim 6, characterized in that: At least a portion of the connecting pipe section is arranged in an arc shape.

8. The battery case according to any one of claims 1 to 7, characterized in that: The cross-section of the first liquid-cooling channel is polygonal or circular; and / or The cross-section of the second liquid-cooling channel is polygonal or circular.

9. The battery case according to any one of claims 1 to 7, characterized in that: At least one mounting hole is provided on the first side beam, and the mounting hole is provided through the first side beam; The air cooling system includes at least one fan, and the fan is correspondingly arranged in the mounting hole.

10. A battery module, characterized in that: include: A battery box, comprising the battery box according to any one of claims 1 to 9, wherein the battery box further comprises a top plate, the top plate is arranged opposite to the bottom plate and covers the accommodating cavity, and the first side beam and the second side beams are arranged around the top plate at one end away from the bottom plate; and The battery cell assembly is arranged in the accommodating cavity of the battery box.

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