Battery pack box body, battery pack box body assembly, battery pack and vehicle

Abstract

The embodiment of the invention provides a battery pack box body, a battery pack box body assembly, a battery pack and a vehicle. The battery pack box body comprises an edge beam assembly and an anti-explosion valve, the boundary beam assembly is provided with an exhaust pipeline, the anti-explosion valve is connected to the position, opposite to the exhaust pipeline, outside the boundary beam assembly, and the anti-explosion valve communicates with the exhaust pipeline. Wherein the exhaust pipeline is coated with a phase change medium; and under the condition that gas generated by the battery pack is transmitted through the exhaust pipeline, the phase change medium absorbs heat of the gas for cooling. When the battery pack is subjected to thermal runaway and high-temperature gas is generated, the high-temperature gas is conveyed along the exhaust pipeline of the edge beam assembly, and the phase change medium coated on the exhaust pipeline can absorb heat of the high-temperature gas for cooling; and when the cooled gas is discharged out of the battery pack box body through the explosion-proof valve, the cooled gas is not easy to react with external oxygen to generate flame due to lower temperature, so that the potential safety hazard of the battery pack is effectively reduced, and the safety of the battery pack is improved.

Description

Technical Field

[0001] This application belongs to the field of vehicle power technology, specifically relating to a battery pack housing, a battery pack housing assembly, a battery pack, and a vehicle. Background Technology

[0002] Battery packs are used to provide electrical energy to vehicles and are an important power source. Battery packs typically consist of a housing and battery cells. The housing houses the battery cells, protects them, and expels hot gases from the housing in the event of thermal runaway within the battery cells.

[0003] In the prior art, the battery pack housing typically includes a side beam assembly, on which an exhaust pipe is provided for transmitting high-temperature gas. The battery pack also includes an explosion-proof valve, which is located at the exhaust end of the exhaust pipe to discharge the high-temperature gas from the battery pack housing.

[0004] However, due to the poor cooling effect of the exhaust pipes on the side beam assembly, it is difficult to achieve sufficient cooling of the high-temperature gas. As a result, the high-temperature gas is prone to react with the air and form a flame when it is discharged from the explosion-proof valve, causing a safety hazard. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a battery pack housing, a battery pack housing assembly, a battery pack, and a vehicle that overcomes or at least partially solves the above problems.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In a first aspect, embodiments of this application provide a battery pack housing, the battery pack housing including a side beam assembly and an explosion-proof valve;

[0008] The side beam assembly is provided with an exhaust pipe, and the explosion-proof valve is connected to the outside of the side beam assembly at a position opposite to the exhaust pipe, and the explosion-proof valve is connected to the exhaust pipe;

[0009] The exhaust pipe is coated with a phase change medium.

[0010] When the gas generated by the battery pack is transported through the exhaust pipe, the phase change medium absorbs the heat of the gas.

[0011] Optionally, the inner wall of the exhaust pipe is coated with the phase change medium, or the outer wall of the exhaust pipe is coated with the phase change medium.

[0012] Optionally, the phase transition temperature of the phase change medium is any value between 400 and 1200°C.

[0013] Optionally, the side beam assembly is provided with an air inlet and an exhaust outlet, the air inlet, the exhaust pipe and the exhaust outlet are connected in sequence, and the explosion-proof valve is connected to the outside of the side beam assembly at a position opposite to the exhaust outlet.

[0014] Optionally, the side beam assembly includes a first beam plate and a second beam plate, the first beam plate and the second beam plate being spaced apart to form the exhaust pipe, and the first beam plate being disposed near the inner side of the battery pack housing, and the second beam plate being disposed near the outer side of the battery pack housing;

[0015] The air inlet is located on the first beam plate, and the exhaust outlet is located on the second beam plate.

[0016] Optionally, the distance between the air inlet and the exhaust outlet is greater than or equal to 15cm.

[0017] Optionally, the battery pack housing further includes a mounting plate assembly, which is connected to the side beam assembly, and the explosion-proof valve is connected to the mounting plate assembly;

[0018] The mounting plate assembly is provided with an exhaust channel, which is connected to the exhaust pipe.

[0019] Secondly, embodiments of this application propose a battery pack housing assembly, the battery pack housing assembly including a cover plate and the battery pack housing;

[0020] The battery pack housing has an opening, and the cover plate is connected to the opening.

[0021] Thirdly, embodiments of this application propose a battery pack, the battery pack including battery cells and the battery pack housing assembly, wherein the battery cells are disposed within the battery pack housing assembly.

[0022] Fourthly, embodiments of this application provide a vehicle that includes the aforementioned battery pack.

[0023] In this embodiment, the battery pack housing includes a side beam assembly and an explosion-proof valve. The side beam assembly is equipped with an exhaust pipe, and the explosion-proof valve is connected to the outside of the side beam assembly at a position opposite to the exhaust pipe, and the explosion-proof valve communicates with the exhaust pipe. The exhaust pipe is coated with a phase change medium. When gas generated by the battery pack is transmitted through the exhaust pipe, the phase change medium absorbs the heat of the gas for cooling. Thus, when the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is transmitted along the exhaust pipe of the side beam assembly. The phase change medium coated on the exhaust pipe can absorb the heat of the high-temperature gas and cool it down, reducing the gas temperature. Consequently, when the cooled gas is discharged from the battery pack housing through the explosion-proof valve, its lower temperature makes it less likely to react with oxygen in the outside air to produce a flame, effectively reducing the safety hazards of the battery pack and improving its safety.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is one of the structural schematic diagrams of a battery pack housing described in the embodiments of this application;

[0027] Figure 2 This is a second schematic diagram of a battery pack housing as described in the embodiments of this application;

[0028] Figure 3 This is one of the cross-sectional structural schematic diagrams of a battery pack housing according to an embodiment of this application;

[0029] Figure 4 This is a second schematic diagram of the cross-sectional structure of a battery pack housing as described in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of another cross-sectional structure of a battery pack housing as described in an embodiment of this application;

[0031] Figure 6 This is one of the schematic diagrams of another structure of a battery pack housing described in the embodiments of this application;

[0032] Figure 7 This is a second schematic diagram of another structure of a battery pack housing described in the embodiments of this application;

[0033] Figure 8This is a third schematic diagram of another structure of a battery pack housing described in the embodiments of this application;

[0034] Figure 9 This is a schematic diagram of another cross-sectional structure of a battery pack housing as described in an embodiment of this application;

[0035] Figure 10 This is a schematic diagram of the structure of a battery pack housing assembly according to an embodiment of this application;

[0036] Figure 11 This is a partial structural schematic diagram of a battery pack according to an embodiment of this application.

[0037] Reference numerals: 10-Side beam assembly; 20-Explosion-proof valve; 11-Exhaust pipe; 12-Phase change medium; 13-Air inlet; 14-Exhaust port; 15-First beam plate; 16-Second beam plate; 30-Mounting plate assembly; 31-Exhaust passage; 40-Cover plate; 17-Opening; 50-Battery cell. Detailed Implementation

[0038] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0039] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0040] In the description of this invention, 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] In the description of this invention, 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 a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Reference Figures 1 to 9 The diagram shows a structural schematic of a battery pack housing according to an embodiment of this application, where the arrows indicate the direction of gas transmission. The battery pack housing specifically includes: a side beam assembly 10 and an explosion-proof valve 20; the side beam assembly 10 is provided with an exhaust pipe 11, and the explosion-proof valve 20 is connected to the outside of the side beam assembly 10 at a position opposite to the exhaust pipe 11, and the explosion-proof valve 20 is in communication with the exhaust pipe 11; wherein, the exhaust pipe 11 is coated with a phase change medium 12; when the gas generated by the battery pack is transmitted through the exhaust pipe 11, the phase change medium 12 absorbs the heat of the gas.

[0043] In this embodiment, when the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is transported along the exhaust pipe 11 of the side beam assembly 10. The phase change medium 12 coated on the exhaust pipe 11 can absorb the heat of the high-temperature gas and cool it down, thereby reducing the temperature of the gas. When the cooled gas is discharged from the battery pack housing through the explosion-proof valve 20, it is less likely to react with oxygen in the outside air to generate a flame due to its low temperature, effectively reducing the safety hazards of the battery pack and improving the safety of the battery pack.

[0044] Specifically, in this embodiment, when the battery pack experiences thermal runaway, it generates gas with temperatures as high as, for example, 400-550°C. This gas readily reacts with oxygen in the ambient air to produce a flame when it is discharged from the explosion-proof valve 20. Therefore, a phase change medium 12 is used to absorb the heat from the gas and quickly store it.

[0045] In this embodiment, the phase change medium 12 can be a phase change material (PCM), which refers to a substance that changes its form with temperature and can provide latent heat. The process by which a phase change material changes from a solid to a gaseous state, or from a liquid to a gaseous state, is called a phase change process. During the phase change process, the phase change material can absorb a large amount of latent heat. For example, in this embodiment, the initial state of the phase change medium 12 can be solid. The solid phase change medium 12 can absorb heat from the high-temperature gas and change into a gaseous state, and then be discharged from the explosion-proof valve 20 along the exhaust pipe 11. In addition, the solid phase change medium 12 can also absorb heat from the high-temperature gas and change into a liquid state. This embodiment does not limit this.

[0046] For example, in the embodiments of this application, the phase change medium 12 can be paraffin or inorganic salt, etc., and the vaporization of paraffin or inorganic salt achieves a good absorption effect on the heat of high-temperature gas. In addition, the phase change medium 12 can also be hydrogel or aerogel, etc., and the specific type of phase change medium 12 is not limited in the embodiments of this application.

[0047] Optionally, in this embodiment, the inner wall of the exhaust pipe 11 is coated with a phase change medium 12. In this way, when the gas is transported through the inner wall of the exhaust pipe 11, it can directly contact the phase change medium 12 for heat exchange and cooling, resulting in a better heat absorption and cooling effect.

[0048] Optionally, in this embodiment, a phase change medium 12 can be coated on the outer wall of the exhaust pipe 11. When the gas is transported in the exhaust pipe 11, heat is transferred to the exhaust pipe 11, and then the heat is absorbed by the phase change medium 12 on the outer wall of the exhaust pipe 11, which can also achieve cooling of the high-temperature gas and avoid the generation of vaporized or liquefied phase change medium 12 in the exhaust pipe 11.

[0049] For example, in the embodiments of this application, the phase change medium 12 may be coated only on the inner wall of the exhaust pipe 11, or only on the outer wall of the exhaust pipe 11, or both the inner and outer walls of the exhaust pipe 11 may be coated with the phase change medium 12 to further improve the cooling effect. The embodiments of this application do not limit this.

[0050] In this embodiment, the phase change medium 12 is exemplified by any value between 400 and 1200°C. For instance, if the phase change medium 12 has a phase change temperature of 400°C, when the battery cell experiences thermal runaway and ejects gas at a temperature greater than or equal to 400°C, the phase change medium absorbs the temperature of the gas and cools it down. Furthermore, the phase change temperature of the phase change medium 12 can also be 500°C, 600°C, 800°C, 1000°C, or 1200°C, etc. This embodiment does not limit the specific value of the phase change temperature of the phase change medium 12.

[0051] Optionally, in this embodiment, the side beam assembly 10 is provided with an air inlet 13 and an exhaust outlet 14. The air inlet 13, the exhaust pipe 11, and the exhaust outlet 14 are connected in sequence, and the explosion-proof valve 20 is connected to the outside of the side beam assembly 10 at a position opposite to the exhaust outlet 14. Specifically, when the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas enters the exhaust pipe 11 through the air inlet 13, is transported along the exhaust pipe 11, and is then discharged from the explosion-proof valve 20 through the exhaust outlet 14, thus achieving a relatively smooth transmission of the high-temperature gas.

[0052] In this embodiment, optionally, the side beam assembly 10 includes a first beam plate 15 and a second beam plate 16, which are spaced apart to form an exhaust pipe 11. The first beam plate 15 is positioned closer to the inner side of the battery pack housing, and the second beam plate 16 is positioned closer to the outer side of the battery pack housing. An air inlet 13 is located on the first beam plate 15, and an exhaust outlet 14 is located on the second beam plate 16. In this embodiment, the battery pack housing contains battery cells 50. The inner side of the battery pack housing refers to the side closer to the battery cells 50, and the outer side of the battery pack housing refers to the side farther from the battery cells 50. When the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is discharged from the inner side of the battery pack housing to the outer side. Therefore, positioning the air inlet 13 on the first beam plate 15, which is closer to the inner side of the battery pack housing, allows for faster transmission of the high-temperature gas to the exhaust pipe 11. Furthermore, by placing the exhaust port 14 on the second beam plate 16 near the outer side of the battery pack housing, high-temperature gas can be discharged to the outside of the battery pack housing more quickly.

[0053] For example, in the embodiments of this application, such as Figure 3 The diagram shows a case where there are two air inlets 13 and one exhaust port 14. The two air inlets 13 are respectively located on both sides of the exhaust port 14. This allows high-temperature gas to be introduced simultaneously through the two air inlets 13, thereby improving the gas transmission efficiency.

[0054] Furthermore, in this embodiment, the number of air inlets 13 can be one or three, etc., and the specific number of air inlets 13 is not limited in this embodiment. Similarly, the number of exhaust ports 14 can be two or three, and the corresponding number of explosion-proof valves 20 can also be two or three. The specific number of exhaust ports 14 and explosion-proof valves 20 is not limited in this embodiment.

[0055] Optionally, in this embodiment, the distance between the air inlet 13 and the exhaust outlet 14 is greater than or equal to 15 cm. This allows the exhaust pipe 11 to have a longer transmission path for the high-temperature gas, further achieving a better cooling effect on the high-temperature gas.

[0056] For example, in the embodiments of this application, the distance between the air inlet 13 and the exhaust port 14 can be 15cm, 20cm, 30cm, 50cm or 70cm, etc. The specific value of the distance between the air inlet 13 and the exhaust port 14 is not limited in the embodiments of this application.

[0057] In some optional embodiments of this application, the battery pack housing further includes a mounting plate assembly 30, which is connected to the side beam assembly 10, and an explosion-proof valve 20 is connected to the mounting plate assembly 30. The mounting plate assembly 30 is provided with an exhaust channel 31, which is connected to an exhaust pipe 11. For example, when the side beam assembly 10 of the battery pack housing is manufactured using a die-cast aluminum process, an explosion-proof valve 20 is usually provided in the mounting plate assembly 30 in related technologies. When the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is directly discharged from the battery pack housing through the explosion-proof valve 20, resulting in a short transmission path. Furthermore, the high-temperature gas is prone to react with oxygen in the outside air when it is discharged from the explosion-proof valve 20, generating a flame. Therefore, in this embodiment of the application, an exhaust channel 31 is provided in the mounting plate assembly 30, and the exhaust channel 31 is connected to the exhaust pipe 11 of the side beam assembly 10.

[0058] When the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is first transported along the exhaust pipe 11 of the side beam assembly 10. The phase change medium 12 coated on the exhaust pipe 11 can absorb the heat of the high-temperature gas and cool it down, thus lowering the gas temperature. The cooled gas is then transported to the exhaust channel 31 of the mounting plate assembly 30 and discharged from the explosion-proof valve 20. For example, in this embodiment, the exhaust pipe 11 can also be coated with the phase change medium 12 to further improve the cooling effect on the high-temperature gas.

[0059] In summary, the battery pack housing described in the embodiments of this application may include at least the following advantages:

[0060] In this embodiment, the battery pack housing includes a side beam assembly and an explosion-proof valve. The side beam assembly is equipped with an exhaust pipe, and the explosion-proof valve is connected to the outside of the side beam assembly at a position opposite to the exhaust pipe, and the explosion-proof valve communicates with the exhaust pipe. The exhaust pipe is coated with a phase change medium. When gas generated by the battery pack is transmitted through the exhaust pipe, the phase change medium absorbs the heat of the gas. Thus, when the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is transmitted along the exhaust pipe of the side beam assembly. The phase change medium coated on the exhaust pipe can absorb the heat of the high-temperature gas and cool it down, reducing the gas temperature. Consequently, when the cooled gas is discharged from the battery pack housing through the explosion-proof valve, its lower temperature makes it less likely to react with oxygen in the outside air to produce a flame, effectively reducing the safety hazards of the battery pack and improving its safety.

[0061] Reference Figure 10 The diagram shows a structural schematic of a battery pack housing assembly according to an embodiment of this application. The battery pack housing assembly includes a cover plate 40 and the battery pack housing. The battery pack housing has an opening 17, and the cover plate 40 is connected to the opening 17. The cover plate 40 is used to close the battery pack housing.

[0062] The battery pack housing assembly described in this application embodiment may include at least the following advantages:

[0063] In this embodiment, the battery pack housing assembly includes a cover plate and the battery pack housing itself. The battery pack housing has an opening, and the cover plate is connected to the opening. The battery pack housing includes a side beam assembly and an explosion-proof valve. The side beam assembly has an exhaust pipe, and the explosion-proof valve is connected to the outside of the side beam assembly at a position opposite to the exhaust pipe, and the explosion-proof valve communicates with the exhaust pipe. The exhaust pipe is coated with a phase change medium. When gas generated by the battery pack is transmitted through the exhaust pipe, the phase change medium absorbs the heat of the gas. Thus, when the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is transmitted along the exhaust pipe of the side beam assembly. The phase change medium coated on the exhaust pipe can absorb the heat of the high-temperature gas and cool it down, reducing the gas temperature. Consequently, when the cooled gas is discharged from the battery pack housing through the explosion-proof valve, its lower temperature makes it less likely to react with oxygen in the outside air to produce a flame, effectively reducing the safety hazards of the battery pack and improving its safety.

[0064] Reference Figure 11 The diagram shows a partial structural schematic of a battery pack according to an embodiment of this application. The battery pack includes battery cells 50 and a battery pack housing assembly, with the battery cells 50 disposed within the battery pack housing assembly. High-temperature gas is generated when the battery cells 50 experience thermal runaway during operation.

[0065] The battery pack described in this application embodiment may include at least the following advantages:

[0066] In this embodiment, the battery pack includes battery cells and a battery pack housing assembly. The battery cells are disposed within the battery pack housing assembly, which includes a cover plate and the battery pack housing itself. The battery pack housing has an opening, and the cover plate is connected to the opening. The battery pack housing includes a side beam assembly and an explosion-proof valve. The side beam assembly has an exhaust pipe, and the explosion-proof valve is connected to the outside of the side beam assembly at a position opposite to the exhaust pipe, and the explosion-proof valve communicates with the exhaust pipe. The exhaust pipe is coated with a phase change medium. When gas generated by the battery pack is transmitted through the exhaust pipe, the phase change medium absorbs the heat of the gas for cooling. In this way, when the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is transported along the exhaust pipe of the side beam assembly. The phase change medium coated on the exhaust pipe can absorb the heat of the high-temperature gas and cool it down, thereby reducing the temperature of the gas. Then, when the cooled gas is discharged from the battery pack housing through the explosion-proof valve, it is less likely to react with oxygen in the outside air to generate a flame due to its low temperature, which effectively reduces the safety hazards of the battery pack and improves the safety of the battery pack.

[0067] This application also proposes a vehicle that includes the aforementioned battery pack.

[0068] For example, in the embodiments of this application, the vehicle may include small cars, medium-sized cars, sedans, trucks, trailers, CDVs (Car Derived Vans), MPVs (multi-Purpose Vehicles), SUVs (Sport Utility Vehicles), etc. The specific type of vehicle is not limited in the embodiments of this application.

[0069] The vehicle described in this application embodiment may include at least the following advantages:

[0070] In this embodiment, the vehicle includes the battery pack, which includes battery cells and a battery pack housing assembly. The battery cells are disposed within the battery pack housing assembly, which includes a cover plate and the battery pack housing itself. The battery pack housing has an opening, and the cover plate is connected to the opening. The battery pack housing includes a side beam assembly and an explosion-proof valve. The side beam assembly has an exhaust pipe, and the explosion-proof valve is connected to the outside of the side beam assembly at a position opposite to the exhaust pipe, and the explosion-proof valve communicates with the exhaust pipe. The exhaust pipe is coated with a phase change medium. When gas generated by the battery pack is transmitted through the exhaust pipe, the phase change medium absorbs the heat of the gas for cooling. In this way, when the battery pack experiences thermal runaway and generates high-temperature gas, the high-temperature gas is transported along the exhaust pipe of the side beam assembly. The phase change medium coated on the exhaust pipe can absorb the heat of the high-temperature gas and cool it down, thereby reducing the temperature of the gas. Then, when the cooled gas is discharged from the battery pack housing through the explosion-proof valve, it is less likely to react with oxygen in the outside air to generate a flame due to its low temperature, which effectively reduces the safety hazards of the battery pack and improves the safety of the battery pack.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack housing, characterized in that, The battery pack housing includes a side beam assembly (10) and an explosion-proof valve (20); The side beam assembly (10) is provided with an exhaust pipe (11), and the explosion-proof valve (20) is connected to the outside of the side beam assembly (10) at a position opposite to the exhaust pipe (11), and the explosion-proof valve (20) is connected to the exhaust pipe (11); The exhaust pipe (11) is coated with a phase change medium (12); When the gas generated by the battery pack is transmitted through the exhaust pipe (11), the phase change medium (12) absorbs the heat of the gas.

2. The battery pack housing according to claim 1, characterized in that, The inner wall of the exhaust pipe (11) is coated with the phase change medium (12), or the outer wall of the exhaust pipe (11) is coated with the phase change medium (12).

3. The battery pack housing according to claim 1, characterized in that, The phase change temperature of the phase change medium (12) is any value between 400-1200℃.

4. The battery pack housing according to any one of claims 1-3, characterized in that, The side beam assembly (10) is provided with an air inlet (13) and an exhaust port (14). The air inlet (13), the exhaust pipe (11) and the exhaust port (14) are connected in sequence. The explosion-proof valve (20) is connected to the outside of the side beam assembly (10) at a position opposite to the exhaust port (14).

5. The battery pack housing according to claim 4, characterized in that, The side beam assembly (10) includes a first beam plate (15) and a second beam plate (16), the first beam plate (15) and the second beam plate (16) are spaced apart to form the exhaust pipe (11), and the first beam plate (15) is disposed near the inner side of the battery pack housing, and the second beam plate (16) is disposed near the outer side of the battery pack housing; The air inlet (13) is disposed on the first beam plate (15), and the exhaust port (14) is disposed on the second beam plate (16).

6. The battery pack housing according to claim 4, characterized in that, The distance between the air inlet (13) and the exhaust outlet (14) is greater than or equal to 15cm.

7. The battery pack housing according to claim 1, characterized in that, The battery pack housing also includes a mounting plate assembly (30), which is connected to the side beam assembly (10), and the explosion-proof valve (20) is connected to the mounting plate assembly (30); The mounting plate assembly (30) is provided with an exhaust channel (31), which is connected to the exhaust pipe (11).

8. A battery pack housing assembly, characterized in that, The battery pack housing assembly includes a cover plate (40) and the battery pack housing as described in any one of claims 1-7; The battery pack housing has an opening (17), and the cover plate (40) is connected to the opening (17).

9. A battery pack, characterized in that, The battery pack includes a battery cell (50) and a battery pack housing assembly as described in claim 8, wherein the battery cell (50) is disposed within the battery pack housing assembly.

10. A vehicle, characterized in that, The vehicle includes the battery pack as described in claim 9.

Images