Battery box and battery pack

Abstract

The utility model discloses a battery box and battery package, battery box includes the frame of setting up the accommodation cavity, the accommodation cavity is divided into the electrical bin and the battery bin of opposite setting, the frame includes the inner side wall and the outer side wall, the inner side wall with the outer side wall is connected and forms the first gas guide channel, at least one first air inlet is provided on the inner side wall and is towards the battery bin, the first gas guide channel is connected with the accommodation cavity through the first air inlet, the outer side wall is provided with the air release structure of being linked together with the first gas guide channel, and thus provides a kind of simple structure, production and processing cost low battery package, both simplify the emission path of high-temperature gas, can also guarantee the orderly discharge of high-temperature harmful gas in battery package along emission path, to isolate and protect the electronic component in electrical bin from heat erosion, effectively avoid the short circuit hidden danger caused by high temperature and high pressure.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and further to a battery box and battery pack. Background Technology

[0002] With the rapid development of the new energy vehicle industry, new energy vehicles have gradually become integrated into people's daily lives. As a core component of new energy vehicles, the safety of power batteries is becoming increasingly prominent. When a power battery experiences thermal runaway, it produces a large amount of flammable gas, which can manifest as a rapid increase in temperature and pressure within the battery, easily leading to dangerous situations. When a power battery experiences thermal runaway, it is necessary to promptly release the high-temperature, high-pressure gases to prevent the battery pack from catching fire and exploding due to expansion.

[0003] Chinese patent CN223206376U discloses a battery box and battery pack. The electrical box has an electrical compartment, and the battery box has a battery compartment and a battery pressure relief chamber formed by a battery mounting bracket and a base plate. The battery box includes a side beam assembly and an explosion-proof valve. The side beam assembly has a side beam pressure relief chamber, and the battery pressure relief chamber is connected to the explosion-proof valve through the side beam pressure relief chamber. Although this method can vent and relieve pressure in the event of thermal runaway, the structure to achieve this function is relatively complex and the production and processing costs are high.

[0004] Therefore, this utility model aims to provide a battery box and battery pack to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the above-mentioned technical problems, the purpose of this application is to provide a battery housing and battery pack to solve the above-mentioned technical problems by addressing the shortcomings of the prior art.

[0006] To achieve the above objectives, this application provides a battery housing, the battery housing including a frame with a receiving cavity, the receiving cavity being divided into an electrical compartment and a battery compartment disposed opposite to each other, characterized in that the frame includes an inner side wall and an outer side wall, the inner side wall and the outer side wall being connected to form a first air guide channel; At least one first air inlet is provided on the inner sidewall facing the battery compartment; the first air guide channel is connected to the accommodating cavity through the first air inlet, and a venting structure connected to the first air guide channel is provided on the outer sidewall.

[0007] In some embodiments, a barrier beam is provided inside the frame, with both ends of the barrier beam inserted into the frame to form the electrical compartment and the battery compartment; the barrier beam is hermetically connected to the frame to seal the first air duct.

[0008] In some embodiments, the frame includes two correspondingly arranged outer longitudinal beams, and two correspondingly arranged first outer transverse beams and second outer transverse beams; the outer longitudinal beams are used for a sealed connection with the barrier beam 23, and the first outer transverse beam and the second outer transverse beam are both arranged perpendicularly to the outer longitudinal beam 24 and are arranged between the two outer longitudinal beams.

[0009] In some embodiments, the first air guide channel is disposed inside the outer longitudinal beam, and the first air inlet is disposed on the inner side wall of the outer longitudinal beam; the air venting structure is disposed on the outer side wall of the second outer cross beam, and a second air guide channel is disposed inside the second outer cross beam, the second air guide channel being used to communicate with the air venting structure and the first air guide channel.

[0010] In some embodiments, each of the two outer longitudinal beams is provided with a pressure relief chamber, and the two ends of the barrier beam are respectively inserted into the two pressure relief chambers and are sealed to the outer longitudinal beams, so that the pressure relief chambers and the corresponding parts of the battery compartment form the first air guiding channel.

[0011] In some embodiments, the battery compartment is provided with an electrical support for dividing the battery compartment into several sub-cavities for installing power supply cells, and the electrical support is provided with mounting positions for installing slave control modules.

[0012] In some embodiments, the electrical support includes at least one inner crossbeam and at least one inner longitudinal beam; the inner longitudinal beam is parallel to the outer longitudinal beam 24, and the inner crossbeam is parallel to the first outer crossbeam 25.

[0013] In some embodiments, the inner longitudinal beam is provided with a clearance opening, and the inner cross beam is used to engage with the inner longitudinal beam through the clearance opening.

[0014] In some embodiments, a second air inlet is provided on the outer side wall of the inner longitudinal beam, and an exhaust channel is provided inside the inner longitudinal beam. The second air inlet is connected to the sub-cavity and is connected to the venting structure through the exhaust channel.

[0015] In some embodiments, the inner longitudinal beam includes a first beam and a second beam arranged sequentially downward along the Z direction, the clearance opening is provided on the first beam; the first beam has an opening groove on the side away from the second beam to form the mounting position; the second air inlet is provided on the outer wall of the second beam, and the exhaust channel is provided on the second beam.

[0016] In some embodiments, the battery housing further includes a base plate disposed on one side of the frame, and a liquid cooling plate and a protective plate are disposed on the side of the base plate away from the frame.

[0017] A battery pack includes a battery housing as described above, wherein the first air duct is disposed on the portion of the frame corresponding to the battery compartment.

[0018] Compared with the prior art, the battery housing and battery pack provided in this application have the following advantages: 1. In the event of thermal runaway, the high-temperature and high-pressure gas in the battery pack of this utility model only needs to enter the first gas guide channel through the first air inlet to be discharged from the venting structure. This simplifies the pressure relief structure and gas flow path, saves space, makes the structure more compact, and enables rapid venting and discharge of thermal runaway gas in the battery compartment. This effectively prevents gas from entering the electrical compartment and damaging electronic components, thereby reducing the risk of explosion and improving overall safety.

[0019] 2. The battery pack of this utility model ensures the sealing of the first air passage through the airtight connection between the barrier beam and the frame, reliably separates the electrical compartment and the battery compartment, avoids mutual interference, prevents gas from entering the electrical compartment, and enhances the structural strength and integrity of the battery box.

[0020] 3. When thermal runaway occurs in the battery pack of this utility model, the high-temperature and high-pressure gas enters the first air inlet, the first air guide channel and the second air guide channel in sequence, and can be discharged from the venting structure set on the second outer crossbeam to the side of the battery box away from the electrical compartment, further reducing the possibility of the gas causing adverse effects on the electronic components in the electrical compartment.

[0021] 4. The battery pack of this utility model has an electrical support inside the frame. The electrical support divides the battery compartment into several sub-cavities, providing independent space for the battery cells. This not only slows down the spread of thermal runaway, but also effectively improves the strength of the battery pack.

[0022] 5. The battery pack of this utility model has a second air inlet on the outer side of the inner longitudinal beam. The second air inlet is connected to the exhaust channel and the venting structure, so that high-temperature and high-pressure gas can also be discharged outward through the second air inlet. In particular, it can effectively improve the gas emission rate when the battery cell located in the middle of the battery compartment experiences thermal runaway.

[0023] 6. The inner longitudinal beam of this utility model includes a first beam and a second beam. The slave control module is set on the first beam through an opening slot, and the second air inlet and exhaust channel are set on the second beam. This can reduce the adverse effects of high temperature and high pressure gas on the slave control module when it is discharged outward, and ensure the stability of the slave control module's operation. Attached Figure Description

[0024] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this application.

[0025] Figure 1 This is a structural schematic diagram of a battery box provided by this utility model; Figure 2 This is a schematic diagram of the internal structure of a battery box provided by this utility model; Figure 3 This is a cross-sectional view of a battery box provided by this utility model; Figure 4 This utility model provides Figure 3 A magnified view of part A; Figure 5 This is a schematic diagram of the structure of the inner longitudinal beam provided by this utility model; Figure 6 This is a schematic diagram of the internal structure of the inner longitudinal beam provided by this utility model; Figure 7 This is a schematic diagram of the internal structure of the outer longitudinal beam provided by this utility model; Figure 8 This is a schematic diagram of the internal structure of the second outer crossbeam provided by this utility model; Figure 9 This is a schematic diagram of the structure of the battery box and electrical support provided by this utility model when they are combined.

[0026] Explanation of icon numbers: 1. Battery housing; 2. Frame; 21. Electrical compartment; 22. Battery compartment; 23. Barrier beam; 24. Outer longitudinal beam; 241. Pressure relief chamber; 242. First air guide channel; 243. First air inlet; 25. First outer crossbeam; 26. Second outer crossbeam; 261. Second air guide channel; 262. Air venting structure; 27. Sub-cavity; 3. Electrical support frame; 31. Inner crossbeam; 32. Inner longitudinal beam; 321. First beam body; 3211. Opening slot; 3212. Clearance opening; 322. Second beam body; 4. Base plate; 5. Liquid cooling plate; 6. Protective plate. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0028] To keep the drawings concise, each drawing only schematically shows the parts relevant to the application; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one."

[0029] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In this embodiment, a battery housing is described, which aims to achieve rapid drainage and discharge of thermal runaway gas in the battery compartment 22 through the cooperation of the first air inlet 243, the first air guide channel 242 and the venting structure 262. This can effectively prevent gas from entering the electrical compartment 21 and damaging electronic components, and has the characteristics of simple structure, compactness and low cost.

[0034] Understandably, when a power battery experiences thermal runaway, it is necessary to promptly release the high-temperature, high-pressure gases to prevent the battery pack from catching fire and exploding due to expansion. Currently, in existing technologies, various structures are incorporated within the battery casing to create exhaust paths for the release of these high-temperature, high-pressure gases. This results in a complex overall structure and exhaust pathways, leading to high production and assembly costs.

[0035] In this embodiment, please refer to the appendix to the specification. Figures 1 to 9 The battery housing includes a battery housing 1 formed by a frame 2, and an accommodating cavity is provided inside the frame 2. It should be noted that, for ease of explanation, in this embodiment, the X direction refers to the length direction of the battery housing 1, the Z direction refers to the height direction of the battery housing 1, and the Y direction refers to the width direction of the battery housing 1. For specific directions, please refer to the attached diagram. Figure 1 Of course, the X, Y, and Z directions can be set according to actual conditions, and no specific limitations are made here. The accommodating cavity is divided into two independent spaces arranged opposite each other: one is an electrical compartment 21 for installing various electronic components, and the other is a battery compartment 22 for accommodating battery cells. The electrical compartment 21 and the battery compartment 22 are arranged sequentially along the length direction (X direction) of the battery casing. Correspondingly, the frame 2 includes an inner sidewall and an outer sidewall, which are connected to form a first air guide channel 242. At least one first air inlet 243 is provided on the inner sidewall of the frame 2 facing the battery compartment 22. The frame 2 itself has a profile structure with the first air guide channel 242 inside. This first air guide channel 242 is connected to the inside of the battery compartment 22 through the first air inlet 243, allowing gas inside the battery compartment 22 to enter the first air guide channel 242 through the first air inlet 243. A venting structure 262 is provided on the outer side wall of the frame 2. The venting structure 262 is used to connect with the first air guide channel 242 so that the gas entering the first air guide channel 242 can be discharged to the outside of the battery box 1 through the venting structure 262.

[0036] Understandably, this embodiment provides a dedicated exhaust and pressure relief path for high-temperature, high-pressure gases, reducing the harm of these gases to the electrical components of the battery system. The inner and outer walls connect to form a first air guide channel 242, and the first air inlet 243 is located on the inner wall near the battery compartment 22. This allows the high-temperature, high-pressure gases within the containment cavity to be discharged sequentially through the first air inlet 243, the first air intake channel, and the pressure relief structure, eliminating the need for additional structures within the battery housing 1 and significantly saving space, thereby contributing to increased cell energy density. Furthermore, the high-temperature, high-pressure gases are effectively physically isolated from the delicate and sensitive electrical components within the electrical compartment 21, reducing the likelihood of electrical short circuits or fires in the electrical compartment 21 and greatly improving the safety and reliability of the entire battery system.

[0037] In one embodiment, see the appendix to the specification. Figure 3 and attached Figure 4 The battery box 1 also includes a base plate 4, which is located on one side of the frame 2, that is, on the lower end of the frame 2. In addition, a liquid cooling plate 5 and a protective plate 6 are arranged in sequence on the side of the base plate 4 away from the frame 2. The liquid cooling plate 5 can cool down the battery cells located in the frame 2, and the protective plate 6 can protect the battery cells and reduce the possibility of the battery cells being affected by collisions with the vehicle chassis.

[0038] Understandably, in this embodiment, the liquid cooling plate 5 serves to dissipate heat from the battery cell. In the event of thermal runaway, the high-temperature, high-pressure gas moves into the frame 2 through the first air inlet 243 and is eventually discharged outwards through the venting structure 262. This process effectively confines the gas within the frame 2 and ensures its eventual discharge, reducing the damage caused by thermal runaway. Furthermore, the gas is prevented from moving downwards and affecting the liquid cooling plate 5, thus guaranteeing its heat dissipation effect on the battery cell during thermal runaway and mitigating the damage caused by the thermal runaway.

[0039] The inner and outer walls are connected to form a first air guide channel 242, which can be arranged around the entire frame 2. No first air inlet 243 is provided on the inner wall corresponding to the electrical compartment 21, so even if gas fills the frame 2, it will not enter the electrical compartment 21 and adversely affect the electronic components inside. Of course, to minimize the impact of gas on the electrical compartment, in one embodiment, see the appendix to the specification. Figure 1 In this embodiment, a barrier beam 23 is provided between the battery compartment 22 and the electrical compartment 21 of the frame 2. The two ends of the barrier beam 23 are tightly inserted into the interior of the frame 2 of the battery housing 1, thereby dividing the cavity of the frame 2 into two independent compartments. The joint between the barrier beam 23 and the frame 2 is sealed by welding or sealant, ensuring not only airtight isolation between the electrical compartment 21 and the battery compartment 22, but also sealing the end of the first air duct 242 formed inside the frame 2, completely isolating hazardous gases from the electrical compartment 21 and preventing gas leakage into the electrical compartment 21, significantly improving the safety and reliability of the depressurization process.

[0040] Further, see the appendix to the instruction manual. Figure 1 Appendix Figure 2 and attached Figure 9The frame 2 includes two outer longitudinal beams 24, a first outer transverse beam 25, and a second outer transverse beam 26. The two outer longitudinal beams 24 are parallel to each other and are arranged along the X direction (the length direction of the battery box). The first outer transverse beam 25 and the second outer transverse beam 26 are respectively arranged along the Y direction, that is, perpendicular to the outer longitudinal beams 24. In addition, the first outer transverse beam 25 and the second outer transverse beam 26 are respectively connected between the two ends of the two outer longitudinal beams 24, thus jointly enclosing the receiving cavity of the battery box.

[0041] Furthermore, the first air guide channel 242 is disposed within the outer longitudinal beam 24, and can be disposed within one or two outer longitudinal beams 24. Correspondingly, the first air inlet 243 is formed on the inner side wall of the outer longitudinal beam 24 facing the battery compartment 22. The venting structure 262 is installed on the outer side wall of the second outer cross beam 26. In order to guide the gas from the outer longitudinal beam 24 to the venting structure 262 for discharge, a second air guide channel 261 is disposed inside the second outer cross beam 26. One end of the second air guide channel 261 is connected to the end of the first air guide channel 242 in one outer longitudinal beam 24, and the other end is connected to the end of the first air guide channel 242 in the other outer longitudinal beam 24.

[0042] In addition, it should be noted that in actual production applications, the venting structure 262 can be set as an explosion-proof valve or as a venting port. High-temperature and high-pressure gas flows into the first air guide channel 242 through the first air inlet 243, then into the second air guide channel 261, and finally is discharged through the pressure relief structure.

[0043] In this embodiment, the exhaust path is optimized and simplified, and all functional channels are hidden inside the load-bearing structure, saving space to the greatest extent and maintaining the neatness and compactness of the battery box's external outline.

[0044] In one embodiment, see the appendix to the specification. Figure 9 To achieve functional partitioning of the accommodating cavity, an electrical support 3 is provided inside the battery compartment 22 in this embodiment. The main function of the electrical support 3 is to effectively divide the space of the battery compartment 22 into multiple sub-cavities 27, each of which is used to accommodate one or more independent battery cell modules, thereby realizing modular installation and management of the battery cells. In addition, a mounting position for installing a battery slave control module is provided at a specific location on the electrical support 3. The slave control module is responsible for monitoring the status of these battery cells.

[0045] For details, please refer to the instruction manual appendix. Figure 5 To be continued Figure 9The electrical support includes at least one inner crossbeam 31 and at least one inner longitudinal beam 32. Each inner longitudinal beam 32 is arranged along the X direction, that is, parallel to the outer longitudinal beam 24, and both ends of each inner longitudinal beam 32 are connected to the first outer crossbeam 25 and the second outer crossbeam 26, respectively. Each inner crossbeam 31 is arranged along the Y direction, that is, parallel to the first outer crossbeam 25, and both ends of each inner crossbeam 31 are connected to the two outer longitudinal beams 24, respectively.

[0046] Furthermore, an abutment 3212 is provided on the inner longitudinal beam 32, and the inner cross beam 31 is engaged with the inner longitudinal beam 32 through the abutment 3212, so that the inner cross beam 31 and the inner longitudinal beam 32 cooperate to divide the battery compartment 22 into multiple sub-cavities 27. Preferably, a notch is provided on the inner cross beam 31 to cooperate with the abutment 3212. The inner cross beam 31 is installed on the inner longitudinal beam 32 by corresponding engagement of the notch and the abutment 3212, so that the bottom surfaces of the two are flush.

[0047] It should be noted that in actual production applications, multiple inner crossbeams 31 and inner longitudinal beams 32 are generally used to divide the space into multiple sub-cavities 27. See the appendix of the instruction manual. Figure 9 In this embodiment, for ease of explanation, two inner longitudinal beams 32 and one inner transverse beam 31 are provided to form six sub-cavities 27 within the battery compartment 22. When thermal runaway occurs in the cells within the sub-cavities 27 on both sides, the gas can be discharged through the first air inlet 243 of the adjacent outer longitudinal beam 24. However, for the cells located in the inner sub-cavities 27, the gas needs to flow a certain distance to the first air inlet 243, resulting in low pressure relief efficiency.

[0048] Therefore, a second air inlet is provided on the outer wall of the inner longitudinal beam 32, and an exhaust channel communicating with the second air inlet is provided inside the inner longitudinal beam 32. The second air inlet is connected to the sub-cavity 27, and the exhaust channel is connected to the second air guide channel 261, and then connected to the venting structure 262.

[0049] Understandably, when thermal runaway occurs, the gas in the inner sub-cavity 27 can flow directly into the exhaust channel through the second air inlet on the inner longitudinal beam 32, and then into the second air guide channel 261 of the second outer crossbeam 26, and finally be discharged through the venting structure 262, thereby effectively improving the efficiency of exhaust and pressure reduction.

[0050] In addition, to reduce the adverse effects of gas flow in the exhaust channel on the slave control module, please refer to the appendix of the instruction manual. Figure 5 and Figure 6The inner longitudinal beam 32 includes a first beam 321 and a second beam 322 arranged sequentially downwards (along the Z direction). The second beam 322 is mounted on the base plate 4. A clearance opening 3212 is formed on the first beam 321, and an opening slot 3211 is provided on the side of the first beam 321 away from the second beam 322 to form a mounting position, allowing the slave control module to be installed in the opening slot 3211. Correspondingly, a second air inlet is formed on the outer wall of the second beam 322, and an exhaust passage is provided inside the second beam 322.

[0051] In this embodiment, the slave control module is placed inside the first beam 321, and the high-temperature and high-pressure gas flows into the second beam 322 through the second air inlet, thereby isolating it from the slave control module, reducing the adverse effects of the high-temperature and high-pressure gas on the slave control module, and ensuring the stability and reliability of the slave control module in the event of thermal runaway as much as possible.

[0052] In one embodiment, specifically, an insertion hole for inserting a barrier beam 23 is provided on the inner sidewall of the outer longitudinal beam 24. The periphery of the insertion hole has a stop step that is recessed inward toward the pressure relief chamber 241. The two ends of the barrier beam 23 inserted into the outer longitudinal beam 24 are sealing mating ends, with their end faces fixedly connected to a sealing end plate. The sealing end plate has an annular sealing groove on the side near the stop step, and an elastic sealing ring is fitted inside the annular sealing groove. The elastic sealing ring forms a radial interference fit with the inner wall of the stop step. The four edges of the sealing end plate are fixedly connected to the inner surface of the sidewall of the outer longitudinal beam 24 by weld.

[0053] Of course, in actual production applications, there are various ways to seal the barrier beam 23 and the outer longitudinal beam 24, which will not be described in detail here.

[0054] In one embodiment, this embodiment provides a battery pack, including the battery housing described above. The first air guide channel 242 is disposed in the part of the frame 2 corresponding to the battery compartment 22, so that high temperature and high pressure gas cannot enter the electrical compartment 21 and the part of the frame 2 corresponding to the electrical compartment 21, thereby ensuring the stability and reliability of the electronic components in the electrical compartment 21.

[0055] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A battery housing, the battery housing (1) comprising a frame (2) having a receiving cavity, the receiving cavity being divided into an electrical compartment (21) and a battery compartment (22) disposed opposite to each other, characterized in that, The frame (2) includes an inner sidewall and an outer sidewall, which are connected to form a first air guide channel (242). At least one first air inlet (243) is provided on the inner sidewall facing the battery compartment (22); the first air guide channel (242) is connected to the accommodating cavity through the first air inlet (243), and an air venting structure (262) is provided on the outer sidewall that is connected to the first air guide channel (242).

2. The battery housing according to claim 1, characterized in that, A barrier beam (23) is provided inside the frame (2). The two ends of the barrier beam (23) are inserted into the frame (2) to form the electrical compartment (21) and the battery compartment (22). The barrier beam (23) is sealed to the frame (2) to seal the first air guide channel (242).

3. A battery housing according to claim 2, characterized in that, The frame (2) includes two correspondingly arranged outer longitudinal beams (24), and two correspondingly arranged first outer transverse beams (25) and second outer transverse beams (26); the outer longitudinal beams (24) are used to be sealed to the barrier beam (23), and the first outer transverse beams (25) and the second outer transverse beams (26) are both arranged perpendicularly to the outer longitudinal beams (24) and are arranged between the two outer longitudinal beams (24).

4. A battery housing according to claim 3, characterized in that, The first air guide channel (242) is disposed inside the outer longitudinal beam (24), and the first air inlet (243) is disposed on the inner side wall of the outer longitudinal beam (24); the air venting structure (262) is disposed on the outer side wall of the second outer cross beam (26), and the second outer cross beam (26) is provided with a second air guide channel (261), which is used to communicate with the air venting structure (262) and the first air guide channel (242).

5. A battery housing according to claim 3 or 4, characterized in that, Both of the outer longitudinal beams (24) are provided with pressure relief chambers (241). The two ends of the barrier beam (23) are respectively inserted into the two pressure relief chambers (241) and are sealed to the outer longitudinal beams (24), so that the pressure relief chambers (241) and the corresponding parts of the battery compartment (22) form the first air guide channel (242).

6. A battery housing according to claim 3, characterized in that, An electrical support (3) is provided inside the battery compartment (22) to divide the battery compartment (22) into several sub-cavities (27) for installing power supply cores, and the electrical support (3) is provided with an installation position for installing the slave control module.

7. A battery housing according to claim 6, characterized in that, The electrical support includes at least one inner crossbeam (31) and at least one inner longitudinal beam (32); the inner longitudinal beam (32) is parallel to the outer longitudinal beam (24), and the inner crossbeam (31) is parallel to the first outer crossbeam (25).

8. A battery housing according to claim 7, characterized in that, The inner longitudinal beam (32) is provided with a clearance opening (3212), and the inner transverse beam (31) is used to engage with the inner longitudinal beam (32) through the clearance opening (3212).

9. A battery housing according to claim 8, characterized in that, A second air inlet is provided on the outer wall of the inner longitudinal beam (32), and an exhaust channel is provided inside the inner longitudinal beam (32). The second air inlet is connected to the sub-cavity (27) and is connected to the venting structure (262) through the exhaust channel.

10. A battery housing according to claim 9, characterized in that, The inner longitudinal beam (32) includes a first beam (321) and a second beam (322) arranged sequentially downwards. The clearance opening (3212) is opened on the first beam (321). An opening slot (3211) is provided on the side of the first beam (321) away from the second beam (322) to form the mounting position. The second air inlet is opened on the outer wall of the second beam (322), and the exhaust channel is arranged inside the second beam (322).

11. A battery housing according to any one of claims 1-4, characterized in that, The battery box (1) also includes a bottom plate (4) disposed on one side of the frame (2), and a liquid cooling plate (5) and a protective plate (6) are disposed on the side of the bottom plate (4) away from the frame (2).

12. A battery pack comprising a battery housing as described in claim 1, wherein the first air duct (242) is disposed in the portion of the frame (2) corresponding to the battery compartment (22).

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