Pressure relief box body structure and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a pressure relief box body structure and a battery pack, the pressure relief box body structure comprises a box body and a pressure relief assembly, the box body comprises frames connected end to end, the frames define a placing cavity, a pressure relief channel communicated with the placing cavity is arranged in the frames, and the pressure relief assembly is arranged in the placing cavity. An anti-explosion valve communicated with the pressure relief channel is further arranged on the frame, a partition plate is further arranged in the placing cavity, and the partition plate divides the placing cavity into a first cavity for placing the battery cell module and a second cavity for placing components; the pressure relief assembly comprises a busbar support, the busbar support is arranged on one side of the pressure relief opening of the battery cell module, a convex rib is arranged on the busbar support, the side, away from the pressure relief opening, of the convex rib protrudes to form a pressure relief groove facing an opening of the pressure relief opening, and the pressure relief groove is communicated with the pressure relief channel. According to the pressure relief box body structure and the battery pack, the structure is simple, chain reaction can be effectively avoided, and the reliability and the safety of the battery pack are greatly improved.

Description

Technical Field

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

[0002] In traditional battery pack structures, the battery cells are usually placed upright with the battery cell pressure relief valve facing upward. During thermal runaway, flames and thermal runaway jets are ejected upward along the pressure relief valve, which may cause the battery pack cover to burn through and even the cockpit to be damaged. Secondly, there is no additional pressure relief design inside the battery pack, and the electrical compartment inside the battery pack is usually directly connected to the battery compartment. During thermal runaway, the high-temperature and high-pressure gas from thermal runaway will fill the entire internal space of the battery pack, causing the components in the electrical compartment to be affected and risking other chain reactions. It can be seen that the existing traditional battery pack structure pressure relief design has poor safety and is prone to chain reactions, posing a major safety hazard. Utility Model Content

[0003] The purpose of the present utility model is to provide a pressure relief box structure and a battery pack, which have a simple structure and can effectively relieve the pressure of the battery pack to avoid affecting other equipment or components and avoiding chain reactions, thereby greatly improving the reliability and safety of the battery pack.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] On the one hand, a pressure relief box structure is provided, comprising a box body and a pressure relief assembly, wherein the box body comprises a plurality of frames connected end to end, the frames enclosing a placement cavity, a pressure relief channel communicating with the placement cavity being provided inside the frames, an explosion-proof valve communicating with the pressure relief channel being further provided on the frames, and a partition being provided inside the placement cavity, the partition dividing the placement cavity into a first cavity for placing a battery cell module and a second cavity for placing components;

[0006] The pressure relief assembly includes a busbar bracket, which is arranged on one side of the pressure relief port of the battery cell module. The busbar bracket is provided with a rib, which protrudes away from the side of the pressure relief port to form a pressure relief groove arranged toward the opening of the pressure relief port, and the pressure relief groove is connected to the pressure relief channel.

[0007] In one embodiment, a pressure-conducting beam is further provided in the first chamber, and a plurality of the battery cell modules are provided. The pressure-conducting beam is provided between two adjacent battery cell modules. A pressure-conducting channel is provided in the pressure-conducting beam, and the pressure-conducting channel is respectively connected to the pressure relief groove and the pressure relief channel.

[0008] In one embodiment, an isolation vertical beam is further provided in the first chamber, and the isolation vertical beam separates the first chamber into a first sub-chamber and a second sub-chamber. The pressure-guiding cross beam in the first sub-chamber is connected to the frame on one side of the first sub-chamber, and the pressure-guiding cross beam in the second sub-chamber is connected to the frame on one side of the second sub-chamber.

[0009] In one embodiment, the frame includes a front frame, a rear frame and a side frame. The two sides of the front frame in the length direction are connected to the two sides of the rear frame in the length direction through the side frames respectively. The explosion-proof valve is arranged on the front frame, and the pressure-guiding beam is connected to the side frames.

[0010] In one embodiment, the second chamber is arranged adjacent to one side of the front frame, and a guide channel is provided in the partition, and the guide channel is communicated with the pressure relief groove and the pressure relief channel respectively.

[0011] In one embodiment, a cover plate and a bottom plate for closing the placement cavity are respectively provided on both sides of the frame, the pressure relief port of the battery cell module is arranged toward the bottom plate, and one end of the protruding rib is connected to the bottom plate.

[0012] In one embodiment, the cover plate is configured as a liquid cooling plate, and a plurality of liquid cooling pipes are provided on the cover plate.

[0013] In one embodiment, a protective gasket is further included. The protective gasket is arranged at the pressure relief port, and the length direction of the protective gasket extends along the length direction of the pressure relief groove.

[0014] On the other hand, a battery pack is also provided, characterized in that it includes a battery cell module, several components and the above-mentioned pressure relief box structure, the battery cell module is arranged in the first chamber, and the several components are arranged in the second chamber.

[0015] In one embodiment, the battery cell module includes several battery cells, a first insulating gasket is provided between two adjacent battery cells with opposite sides, a first buffer gasket is provided between two adjacent battery cells with opposite large surfaces, and a second buffer gasket and a second insulating gasket are provided on one side of the large surface of the battery cells in each group of the battery cell modules.

[0016] Beneficial effects of the utility model:

[0017] The present invention provides a pressure relief box structure that, by providing a partition, separates the placement cavity formed by the box body frame into a first chamber and a second chamber, each for accommodating a battery module and components, respectively. This achieves the separation and independence of the battery compartment and the electrical compartment, effectively preventing the components from being affected by thermal runaway and triggering a chain reaction, thereby improving safety. Furthermore, a busbar support is provided on one side of the pressure relief port of the battery module. The busbar support is provided with a rib, and the rib forms a pressure relief groove facing the pressure relief port. The pressure relief groove communicates with the pressure relief channel of the frame, and the pressure relief groove and the pressure relief channel communicate to form a pressure relief chamber. In the event of thermal runaway, high-temperature, high-pressure gases and high-temperature materials such as ejected materials from the battery module are confined within the pressure relief chamber and released sequentially through the pressure relief groove, the pressure relief channel, and the explosion-proof valve, thereby minimizing the impact on components within the electrical compartment. The pressure relief chamber allows for rapid pressure relief and helps prevent heat from spreading within the battery compartment, which could cause secondary damage to undamaged battery modules and trigger a chain reaction, thereby effectively improving reliability and safety.

[0018] Furthermore, high-temperature, high-pressure gases and high-temperature substances such as the ejecta from the battery cell module pass through the pressure relief groove and quickly pass through the pressure relief channel provided in the frame. When the high-temperature substances pass through the pressure relief channel of the frame, a large amount of heat will be dissipated, thereby achieving effective cooling, which can effectively prevent fires and even explosions, and further improve reliability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the explosion structure of the pressure relief box structure in one embodiment;

[0020] Figure 2 1 is a structural diagram of a box body in one embodiment;

[0021] Figure 3 is another structural schematic diagram of the box body in one embodiment;

[0022] Figure 4 This is a schematic diagram of the pressure relief path structure of the pressure relief box structure in one embodiment;

[0023] Figure 5 is a schematic diagram of the disassembled structure of the battery cell module and the busbar bracket in one embodiment;

[0024] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure of the middle part A;

[0025] Figure 7 yes Figure 6 Schematic diagram of the structure of the middle busbar bracket;

[0026] Figure 8is a schematic structural diagram of a battery pack in one embodiment;

[0027] Figure 9 is a structural schematic diagram of a battery cell module in one embodiment;

[0028] Figure 10 yes Figure 9 Schematic diagram of the enlarged structure of part B in the middle.

[0029] In the picture:

[0030] 1. Battery pack; 100. Box body; 110. Frame; 111. Front frame; 112. Rear frame; 113. Side frame; 120. Storage chamber; 121. First chamber; 1211. First sub-chamber; 1212. Second sub-chamber; 122. Second chamber; 130. Explosion-proof valve; 140. Partition; 150. Pressure-guiding beam; 151. Pressure relief hole; 160. Isolation beam; 170. Cover; 171. Liquid cooling Pipeline; 180, base plate; 190, thermal conductive structural adhesive; 200, busbar bracket; 210, rib; 220, pressure relief groove; 230, buffer sheet; 300, battery cell module; 300a, battery cell; 310, pressure relief port; 400, components; 500, sealing strip; 600, protective gasket; 710, first insulating gasket; 720, second insulating gasket; 810, first buffer gasket; 820, second buffer gasket. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0035] like Figures 1 to 6 As shown, a pressure relief box structure of this embodiment includes a box body 100 and a pressure relief assembly. The box body 100 includes a plurality of frames 110 connected end to end. The frames 110 are arranged to form a placement cavity 120. A pressure relief channel (not shown) communicating with the placement cavity 120 is provided inside the frame 110. An explosion-proof valve 130 communicating with the pressure relief channel is also provided on the frame 110. A partition 140 is further provided inside the placement cavity 120. The partition 140 divides the placement cavity 120 into A first chamber 121 for placing the battery module 300 and a second chamber 122 for placing the components 400; the pressure relief assembly includes a bus bracket 200, which is arranged on one side of the pressure relief port 310 of the battery module 300, and a rib 210 is provided on the bus bracket 200, which protrudes away from the side of the pressure relief port 310 to form a pressure relief groove 220 opened toward the pressure relief port 310, and the pressure relief groove 220 is connected to the pressure relief channel.

[0036] In this embodiment, a partition 140 is provided to separate the placement cavity 120 formed by the frame 110 of the box body 100 into a first chamber 121 and a second chamber 122, which are used to place the battery module 300 and the components 400, respectively. This achieves the independence and separation of the battery compartment and the electrical compartment, which helps to prevent the components 400 from being affected and triggering a chain reaction when thermal runaway occurs, thereby improving safety performance. Furthermore, a busbar bracket 200 is provided on one side of the pressure relief port 310 of the battery module 300. The busbar bracket 200 is provided with a rib 210, and a pressure relief groove 220 is formed by the rib 210 and is opened toward the pressure relief port 310. The pressure relief groove 220 is connected to the pressure relief channel of the frame 110, and the pressure relief groove 220 and the pressure relief channel are connected to form a pressure relief chamber. In the event of thermal runaway, high-temperature, high-pressure gases and materials ejected from the battery cell module 300 are confined within the pressure relief chamber. Pressure is released sequentially along the pressure relief groove 220, the pressure relief channel, and through the explosion-proof valve 130, minimizing the risk of damage to the components 400 within the electrical compartment. Rapid pressure relief through the pressure relief chamber also helps prevent heat from spreading within the battery compartment, which could cause secondary damage to undamaged battery cell modules 300 and trigger a chain reaction, thereby effectively improving reliability and safety.

[0037] Furthermore, high-temperature substances such as high-temperature and high-pressure gases and ejecta from the battery cell module 300 pass through the pressure relief channel provided in the frame 110 through the pressure relief groove 220. A large amount of heat will be dissipated when passing through the pressure relief channel of the frame 110, thereby achieving effective cooling, effectively preventing fires and even explosions, and further improving reliability and safety.

[0038] In one embodiment, a pressure-guiding beam 150 is further provided within the first chamber 121. Multiple cell modules 300 are provided, and the pressure-guiding beam 150 is disposed between two adjacent cell modules 300. A pressure-guiding channel (not shown) is provided within the pressure-guiding beam 150, which communicates with the pressure relief groove 220 and the pressure relief channel, respectively. Specifically, a pressure relief hole 151 is provided at one end of the pressure-guiding beam 150, adjacent to the pressure relief groove 220, through which high-temperature material within the pressure relief groove 220 enters the pressure-guiding channel. In this embodiment, by providing multiple cell modules 300 and disposing a pressure-guiding crossbeam 150 between two adjacent cell modules 300, when thermal runaway occurs in a cell module 300, high-temperature material can be rapidly directed into the pressure-guiding channel within the pressure-guiding crossbeam 150 through the pressure relief groove 220. The high-temperature material then buffers the pressure and cools the pressure through the pressure-guiding channel. The material is then directed through the pressure-guiding channel into the pressure relief channel and finally discharged from the explosion-proof valve 130. This improves the stability and safety of the overall pressure relief. Separating the multiple cell modules 300 by the pressure-guiding crossbeam 150 can, to a certain extent, prevent the chain reaction caused by mutual influence between the multiple cell modules 300 when thermal runaway occurs, thereby improving the safety of the overall structure.

[0039] In one embodiment, an isolation vertical beam 160 is further provided in the first chamber 121, which separates the first chamber 121 into a first sub-chamber 1211 and a second sub-chamber 1212. The pressure-guiding beam 150 in the first sub-chamber 1211 is connected to the frame 110 on one side of the first sub-chamber 1211, and the pressure-guiding beam 150 in the second sub-chamber 1212 is connected to the frame 110 on one side of the second sub-chamber 1212. In this embodiment, the battery cell modules 300 in the first chamber 121 are separated and placed in the first sub-chamber 1211 and the second sub-chamber 1212 by isolating the vertical beams 160, which can further separate the battery cell modules 300 and further avoid the chain reaction caused by mutual influence between the multiple battery cell modules 300 when thermal runaway occurs. In addition, the pressure-conducting beams 150 in the first sub-chamber 1211 and the second sub-chamber 1212 are respectively connected to the adjacent frames 110 to achieve rapid pressure relief and heat conduction, which is conducive to further improving the pressure relief efficiency and ensuring the safety of the overall structure.

[0040] In one embodiment, the frame 110 includes a front frame 111, a rear frame 112, and side frames 113. The two sides of the front frame 111 in the longitudinal direction are connected to the two sides of the rear frame 112 in the longitudinal direction through the side frames 113. The explosion-proof valve 130 is set on the front frame 111, and the pressure-guiding beam 150 is connected to the side frames 113. Figure 4 As shown, in this embodiment, the length direction of the pressure relief groove 220 is parallel to the length direction of the side frame 113 and perpendicular to the length direction of the pressure guiding beam 150. Therefore, during the pressure relief process, the high-temperature material is first introduced into the pressure guiding channel of the pressure guiding beam 150 along the pressure relief groove 220, and then enters the pressure relief channel of the front frame 111 through the pressure relief channel of the side frame 113, and finally discharged from the explosion-proof valve 130 of the front frame 111 to relieve the pressure.

[0041] In one embodiment, the second chamber 122 is disposed adjacent to the front frame 111, and a guide channel (not shown) is disposed in the partition 140, the guide channel being connected to the pressure relief groove 220 and the pressure relief channel. Figure 4 As shown, during a thermal runaway process, high-temperature material adjacent to the side of the partition 140 can be directly introduced into the guide channel through the pressure relief groove 220, then directly introduced into the pressure relief channel of the side frame 113 through the guide channel, and then flow through the pressure relief channel of the front frame 111 and finally discharged from the explosion-proof valve 130. By providing a guide channel within the partition 140, the efficiency of pressure relief and discharge of high-temperature material can be further improved, and high-temperature material adjacent to the second chamber 122 can be prevented from accumulating and remaining for too long, thereby affecting the components 400 in the second chamber 122. This is beneficial for protecting the components 400 in the second chamber 122 and effectively preventing chain reactions.

[0042] Furthermore, if Figure 4 As shown, in this embodiment, a pressure relief channel is also provided in the rear frame 112, and the pressure relief channel in the rear frame 112 is respectively connected to the pressure relief groove 220 adjacent to the side of the rear frame 112 and the pressure relief channel of the side frame 113, so that the high-temperature material ejected from the battery cell module 300 adjacent to the side of the rear frame 112 can be quickly introduced into the pressure relief channel of the rear frame 112 through the pressure relief groove 220, and then passed through the side frame 113 and the front frame 111 and finally discharged from the explosion-proof valve 130, thereby reducing the risk of accumulation of high-temperature material on one side of the rear frame 112. In this embodiment, a pressure relief path for rapid pressure relief is formed by designing the pressure relief channel of the overall frame 110, the pressure relief groove 220 of the bus bracket 200, the pressure guiding channel of the pressure guiding beam 150, and the flow guiding channel of the partition 140. This can improve the pressure relief efficiency, avoid the accumulation and retention of high-temperature materials in the box structure, and is beneficial to protecting the battery module 300 and components 400 in the box structure, avoiding secondary chain reactions, and improving the reliability and safety of pressure relief.

[0043] In one embodiment, a cover plate 170 and a bottom plate 180 are provided on both sides of the frame 110 for enclosing the placement cavity 120. The pressure relief vent 310 of the battery module 300 is arranged toward the bottom plate 180, and one end of the protruding rib 210 is connected to the bottom plate 180. In this embodiment, by arranging the pressure relief vent 310 of the battery module 300 toward the bottom plate 180, the risk of endangering the cockpit in the event of thermal runaway can be effectively reduced. Specifically, a buffer sheet 230 is provided between the rib 210 and the bottom plate 180 to reduce the impact of the rib 210 on the bottom plate 180, thereby preventing the rib 210 from being deformed by external impact, that is, deformation of the pressure relief groove 220, thereby affecting the pressure relief effect of the pressure relief groove 220. Furthermore, a sealing strip 500 is provided between the frame 110 and the cover plate 170 and the bottom plate 180 to ensure the sealing of the overall box structure.

[0044] In one embodiment, the cover plate 170 is configured as a liquid cooling plate, and a plurality of liquid cooling pipes 171 are provided on the cover plate 170. Cooling liquid or cold air is injected into the liquid cooling pipes 171 to cool the battery module 300. Specifically, the battery module 300 and the cover plate 170 are bonded together using a thermally conductive structural adhesive 190. The thermally conductive structural adhesive 190 not only ensures a stable connection between the battery module 300 and the cover plate 170, but also improves the thermal conductivity of the cover plate 170, thereby enhancing the cooling effect.

[0045] In the event of thermal runaway, since the direction of cold air movement is from top to bottom, placing the cooling cover plate 170 at the top can improve the cooling effect of the cover plate 170 to a certain extent. Furthermore, the pressure relief vent 310 of the battery cell module 300 is positioned away from the cover plate 170. This prevents the cover plate 170 from being directly impacted by high-temperature materials and potentially damaged in the event of thermal runaway. This allows the cover plate 170 to continue cooling even during thermal runaway, helping to mitigate the impact of thermal runaway.

[0046] In one embodiment, a protective gasket 600 is further included. The protective gasket 600 is positioned at the pressure relief port 310, with the length of the protective gasket 600 extending along the length of the pressure relief groove 220. In actual operation, the protective gasket 600 is made of mica paper, which effectively provides insulation and thermal isolation, and also has a certain flame retardant effect. This prevents the high-temperature material ejected from the pressure relief port 310 from directly burning through the pressure relief groove 220, ensuring that the high-temperature material can smoothly pass through the pressure relief groove 220 and be diverted into the pressure relief channel, ultimately being discharged from the explosion-proof valve 130, completing the pressure relief and improving the safety of the overall structure.

[0047] On the other hand, Figure 7 As shown, the utility model also provides a battery pack, including a battery cell module 300, a plurality of components 400 and the above-mentioned pressure relief box structure. The battery cell module 300 is arranged in the first chamber 121, and the plurality of components 400 are arranged in the second chamber 122, which effectively separates the battery cell module 300 and the components 400. This is beneficial to avoid the battery cell module 300 and the components 400 from affecting each other and causing a chain reaction when thermal dead space occurs, thereby increasing the hazard level or causing secondary hazards, and can effectively ensure the reliability and safety of the battery pack 1.

[0048] In one embodiment, Figure 8 and Figure 9 As shown, the battery module 300 includes a plurality of battery cells 300a. A first insulating gasket 710 is provided between two adjacent battery cells 300a with opposite sides to prevent a short circuit between the two battery cells 300a. A first buffer gasket 810 is provided between two adjacent battery cells 300a with opposite large surfaces to prevent the battery cells 300a from squeezing the adjacent battery cells 300a after expansion, causing a chain reaction. Furthermore, a second buffer gasket 820 and a second insulating gasket 720 are provided on the large surface side of the battery cells 300a in each group of battery modules 300, respectively, to achieve insulation and buffering between each group of battery modules 300, avoid mutual influence between adjacent battery modules 300, and avoid thermal runaway or the impact of expansion or other failures of a group of battery modules 300 on other battery modules 300, which is conducive to reducing losses and reducing the harm caused by secondary reactions.

[0049] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pressure relief box structure, characterized in that: include: A box body (100), the box body (100) comprising a plurality of frames (110) connected end to end, the frames (110) enclosing a placement cavity (120), a pressure relief channel communicating with the placement cavity (120) being provided inside the frames (110), an explosion-proof valve (130) communicating with the pressure relief channel being further provided on the frames (110), a partition (140) being further provided inside the placement cavity (120), the partition (140) dividing the placement cavity (120) into a first cavity (121) for placing a battery module (300) and a second cavity (122) for placing components (400); A pressure relief assembly, comprising a busbar support (200), the busbar support (200) being arranged on one side of a pressure relief port (310) of the battery cell module (300), the busbar support (200) being provided with a convex rib (210), the convex rib (210) being raised away from the pressure relief port (310) to form a pressure relief groove (220) opening toward the pressure relief port (310), the pressure relief groove (220) being communicated with the pressure relief channel.

2. The pressure relief box structure according to claim 1, characterized in that: A pressure-conducting crossbeam (150) is further provided in the first chamber (121), a plurality of the battery cell modules (300) are provided, the pressure-conducting crossbeam (150) is provided between two adjacent battery cell modules (300), a pressure-conducting channel is provided in the pressure-conducting crossbeam (150), and the pressure-conducting channel is respectively communicated with the pressure relief groove (220) and the pressure relief channel.

3. The pressure relief box structure according to claim 2, characterized in that: An isolation vertical beam (160) is further provided in the first chamber (121), and the isolation vertical beam (160) divides the first chamber (121) into a first sub-chamber (1211) and a second sub-chamber (1212); the pressure-guiding cross beam (150) in the first sub-chamber (1211) is connected to the frame (110) on one side of the first sub-chamber (1211), and the pressure-guiding cross beam (150) in the second sub-chamber (1212) is connected to the frame (110) on one side of the second sub-chamber (1212).

4. The pressure relief box structure according to claim 3, characterized in that: The frame (110) comprises a front frame (111), a rear frame (112) and a side frame (113); both sides of the front frame (111) in the length direction are connected to both sides of the rear frame (112) in the length direction via the side frames (113); the explosion-proof valve (130) is arranged on the front frame (111); and the pressure-guiding beam (150) is connected to the side frames (113).

5. The pressure relief box structure according to claim 4, characterized in that: The second chamber (122) is arranged adjacent to one side of the front frame (111), and a guide channel is provided in the partition (140), and the guide channel is respectively connected to the pressure relief groove (220) and the pressure relief channel.

6. The pressure relief box structure according to any one of claims 1 to 5, characterized in that: A cover plate (170) and a bottom plate (180) for closing the placement cavity (120) are respectively provided on both sides of the frame (110); a pressure relief port (310) of the battery cell module (300) is arranged toward the bottom plate (180); and a protruding end of the rib (210) is connected to the bottom plate (180).

7. The pressure relief box structure according to claim 6, characterized in that: The cover plate (170) is configured as a liquid cooling plate, and a plurality of liquid cooling pipes (171) are provided on the cover plate (170).

8. The pressure relief box structure according to any one of claims 1 to 5, characterized in that: It also includes a protective gasket (600), which is arranged at the pressure relief port (310), and the length direction of the protective gasket (600) extends along the length direction of the pressure relief groove (220).

9. A battery pack (1), characterized in that: The invention comprises a battery cell module (300), a plurality of components (400) and a pressure relief box structure according to any one of claims 1 to 8, wherein the battery cell module (300) is arranged in the first chamber (121), and the plurality of components (400) are arranged in the second chamber (122).

10. The battery pack according to claim 9, characterized in that: The battery cell module (300) comprises a plurality of battery cells (300a), wherein a first insulating gasket (710) is provided between two adjacent battery cells (300a) facing each other on the side, and a first buffer gasket (810) is provided between two adjacent battery cells (300a) facing each other on the large surface. In each group of the battery cell modules (300), a second buffer gasket (820) and a second insulating gasket (720) are provided in sequence on one side of the large surface of the battery cells (300a).

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