Battery pack and electric device

Abstract

The utility model provides a kind of battery pack and electrical equipment, battery pack includes box, multiple battery modules and multiple connecting pipes, box is formed with pressure discharge passage, pressure discharge passage is suitable for being communicated with outside atmosphere, multiple battery modules are located in box, multiple battery modules include first battery module and multiple second battery modules, first battery module is adjacent pressure discharge passage setting, every battery module is formed with pressure relief passage, the pressure relief passage of first battery module is connected with pressure discharge passage, multiple connecting pipes are located in box, and the pressure relief passage of every second battery module is connected pressure discharge passage by connecting pipe.It is thus reduced the complexity of pressure relief path, ensure that multiple battery modules can release pressure simultaneously in emergency, further improve the security of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery packs and electrical equipment. Background Technology

[0002] A battery pack typically consists of a housing and battery modules housed within it. Each battery module comprises multiple cells, which may experience thermal runaway during charging and discharging due to excessively high temperatures. When a cell experiences thermal runaway, a large amount of gas needs to be released. To address this issue, related technologies utilize aluminum extrusion housing cavities for pressure relief. However, this method is only suitable for depressurizing single-layer battery modules and cannot meet the requirement of simultaneously depressurizing multiple battery modules. Utility Model Content

[0003] The present invention provides a battery pack and electrical equipment that enables simultaneous pressure relief of multiple battery modules.

[0004] In a first aspect, embodiments of the present invention provide a battery pack.

[0005] In one embodiment, the battery pack includes:

[0006] The enclosure has a pressure relief channel that is adapted to connect with the outside atmosphere.

[0007] Multiple battery modules are disposed within the housing. The multiple battery modules include a first battery module and multiple second battery modules. The first battery module is disposed adjacent to the pressure relief channel. Each battery module forms a pressure relief channel. The pressure relief channel of the first battery module is connected to the pressure relief channel.

[0008] Multiple connecting pipes are disposed inside the housing, and the pressure relief channel of each second battery module is connected to the pressure relief channel through the connecting pipes.

[0009] In one embodiment, a plurality of the battery modules are stacked along a first direction;

[0010] The connecting pipe and the pressure relief channel are arranged along the first direction;

[0011] The pressure relief channel and the multiple battery modules are arranged along a second direction, which intersects with the first direction.

[0012] In one embodiment, a plurality of the battery modules are stacked along a first direction;

[0013] The connecting pipe and the pressure relief channel are arranged along the first direction;

[0014] The pressure relief channel is arranged along the second direction with respect to the plurality of battery modules, and the second direction intersects with the first direction.

[0015] In one embodiment, the connecting pipe further includes a first connector and a second connector. One end of the bellows section is connected to the pressure relief channel through the first connector, and the other end of the bellows section is connected to the pressure relief channel through the second connector.

[0016] In one embodiment, the first connector is detachably connected to the box body; and / or,

[0017] The second connector is detachably connected to the battery module.

[0018] In one embodiment, the connecting pipe further includes a first connecting flange, and the first connector is detachably connected to the box body through the first connecting flange; and / or,

[0019] The connecting pipe further includes a second connecting flange, and the second connector is detachably connected to the second battery module through the second connecting flange.

[0020] In one embodiment, it further includes a plurality of first sealing rings, and the first sealing rings are clamped between the first connecting flange and the second battery module; and / or,

[0021] The battery pack further includes a plurality of second sealing rings, and the second sealing rings are clamped between the second connecting flange and the box body.

[0022] In one embodiment, the pressure relief channel includes a first pressure relief section, and the first pressure relief section is arranged on the side of the battery module;

[0023] The pressure relief channel includes a first pressure relief section, and the first pressure relief section is arranged at the bottom of the box body;

[0024] Both the first connector and the second connector are formed with a communicating flow channel. The communicating flow channel of the first connector connects the first pressure relief section and the bellows section, and the communicating flow channel of the second connector connects the first pressure relief section and the bellows section. Among them, the communicating flow channel of one of the first connector and the second connector is bent.

[0025] In one embodiment, the box body includes:

[0026] A bottom plate;

[0027] A side frame, one end of the side frame is connected to the bottom plate, the side frame includes a first frame section, a second frame section and a third frame section which are connected in sequence, and the first frame section and the third frame section are arranged opposite to each other;

[0028] A partition is disposed within the side frame and is positioned opposite and spaced apart from the bottom plate. The partition is connected to the first frame segment, the second frame segment, and the third frame segment, such that the partition, the first frame segment, the second frame segment, the third frame segment, and the bottom plate together form the pressure relief channel.

[0029] In one embodiment, the pressure relief channel includes a first pressure relief section, a second pressure relief section, and a third pressure relief section arranged in sequence. The first pressure relief section is arranged through the partition along the direction of gravity and is connected to one end of a plurality of connecting pipes. At least one of the first frame section, the second frame section, and the third frame section is provided with the third pressure relief section, which is adapted to be connected to the outside atmosphere.

[0030] In one embodiment, the pressure relief channel includes a pressure-collecting chamber and a communicating air passage;

[0031] The battery module includes:

[0032] A housing having the pressure chamber and the communicating air passage;

[0033] Multiple battery cells are disposed within the housing, and the explosion-proof valve of each battery cell is adapted to be connected to the pressure chamber. The connecting air passage is connected to the pressure relief passage through multiple connecting pipes.

[0034] Secondly, this application also provides an electrical device, which includes a battery pack as described above.

[0035] The beneficial effects of the embodiments of this utility model are as follows:

[0036] In this embodiment of the invention, each battery module is designed with a pressure relief channel, which is connected to the pressure relief channel of the housing via a connecting pipe. This design allows for the rapid release of high-pressure gas to the outside atmosphere when a battery module experiences thermal runaway or an abnormal increase in internal pressure, preventing the risk of explosion due to pressure buildup. The first battery module is located adjacent to and directly connected to the pressure relief channel without the need for an additional connecting pipe. This design reduces the complexity of the pressure relief path and ensures that multiple battery modules can simultaneously and quickly release pressure in an emergency, further improving the safety of the battery pack. Multiple second battery modules are connected to the pressure relief channel via connecting pipes, making the layout of multiple battery modules more flexible. Connecting all battery modules via the pressure relief channel avoids the need for each module to release pressure individually, simplifying the housing structure and saving space. If a battery module or connecting pipe malfunctions, that part can be replaced individually without disassembling the entire battery pack, improving maintenance efficiency. The pressure relief channel not only releases pressure but also guides airflow to a certain extent, aiding in heat dissipation inside the battery pack. Multiple battery modules are connected to the outside atmosphere through a pressure relief channel, which can guide harmful gases (such as gases generated by electrolyte decomposition) generated during the pressure relief process of the battery modules to a safe area for discharge, reducing harm to the environment and people. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a battery pack (partial structure) provided in an embodiment of this utility model;

[0039] Figure 2 yes Figure 1 A cross-sectional view of the battery pack shown.

[0040] Figure 3 yes Figure 2 Front view diagram;

[0041] Figure 4 yes Figure 3 A magnified view of part A shown below;

[0042] Figure 5 This is a schematic diagram of the connecting pipe provided in an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Battery pack; 10. Housing; 11. Pressure relief channel; 112. Second pressure relief section; 113. Third pressure relief section; 12. Base plate; 13. Side frame; 131. First frame section; 132. Second frame section; 133. Third frame section; 14. Separator; 20. Battery module; 20a. First battery module; 20b. Second battery module; 21. Pressure relief channel; 211. First pressure relief section; 212. Pressure collection chamber; 213. 1. Connecting air passage; 22. Housing; 23. Battery cell; 30. Connecting pipe; 31. Corrugated pipe section; 32. First connector; 33. Second connector; 331. First connecting pipe section; 332. Second connecting pipe section; 34. First connecting flange; 35. Second connecting flange; 36. Connecting flow channel; 361. First flow channel section; 362. Second flow channel section; 41. First sealing ring; 42. Second sealing ring; 50. Explosion relief valve. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0046] A battery pack typically consists of a housing and battery modules housed within it. Each battery module comprises multiple cells, which may experience thermal runaway during charging and discharging due to excessively high temperatures. When a cell experiences thermal runaway, a large amount of gas needs to be released. To address this issue, related technologies utilize aluminum extrusion housing cavities for pressure relief. However, this method is only suitable for depressurizing single-layer battery modules and cannot meet the requirement of simultaneously depressurizing multiple battery modules.

[0047] In view of this, the present invention proposes a battery pack, Figures 1 to 4 This is a schematic diagram of an embodiment of the battery pack provided by this utility model. The battery pack provided by this utility model is suitable for pressure relief of multiple battery modules. The battery pack will be described in detail below with reference to the main accompanying drawings.

[0048] Reference Figures 1 to 3The battery pack 100 includes a housing 10, multiple battery modules 20, and multiple connecting pipes 30. The housing 10 forms a pressure relief channel 11, which is adapted to be connected to the outside atmosphere. The multiple battery modules 20 are disposed inside the housing 10. The multiple battery modules 20 include a first battery module 20a and multiple second battery modules 20b. The first battery module 20a is disposed adjacent to the pressure relief channel 11. Each battery module 20 forms a pressure relief channel 21. The pressure relief channel 21 of the first battery module 20a is connected to the pressure relief channel 11. The multiple connecting pipes 30 are disposed inside the housing 10. The pressure relief channel 21 of each second battery module 20b is connected to the pressure relief channel 11 through the connecting pipe 30.

[0049] In this embodiment of the invention, each battery module 20 is designed with a pressure relief channel 21, which is connected to the pressure relief channel 11 of the housing 10 via a connecting pipe 30. This design allows for the rapid release of high-pressure gas to the outside atmosphere when a battery module 20 experiences thermal runaway or an abnormal increase in internal pressure, thus avoiding the risk of explosion due to pressure buildup. The first battery module 20a is located adjacent to and directly connected to the pressure relief channel 11 without requiring an additional connecting pipe 30. This design reduces the complexity of the pressure relief path and ensures that multiple battery modules can simultaneously and quickly release pressure in an emergency, further improving the safety of the battery pack. Multiple second battery modules 20b are connected to the pressure relief channel 11 via connecting pipes 30, making the layout of the multiple battery modules 20 more flexible. Connecting the pressure relief channels 21 of all battery modules 20 via the pressure relief channel 11 avoids the need for each module to release pressure individually, simplifies the structure of the housing 10, and saves space. If a battery module 20 or connecting pipe 30 malfunctions, that part can be replaced individually without disassembling the entire battery pack 100, improving maintenance efficiency. The pressure relief channel 11 not only releases pressure but also guides airflow to some extent, aiding in heat dissipation within the battery pack 100. Multiple battery modules 20 are connected to the outside atmosphere through the pressure relief channel 11, allowing harmful gases generated during the pressure relief process (such as gases produced by electrolyte decomposition) to be guided to a safe area for discharge, reducing harm to the environment and personnel.

[0050] Reference Figures 1 to 3In one embodiment, multiple battery modules 20 are stacked along a first direction, and connecting pipes 30 and pressure relief channels 11 are arranged along the first direction. The pressure relief channels 11 and the multiple battery modules 20 are arranged along a second direction, which intersects with the first direction. This arrangement helps to place as many battery modules 20 as possible within a limited space, increasing energy density. The connecting pipes 30 and pressure relief channels 11 are also arranged along the first direction, which simplifies the design and manufacturing process of the pipes and facilitates the rapid and efficient discharge of gas to be depressurized. The pressure relief channels 11 and the multiple battery modules 20 are arranged along a second direction intersecting the first direction. This allows for more efficient arrangement of the battery modules 20 and pressure relief channels 11 within a limited space, making the entire battery pack 100 structure more compact.

[0051] It should be noted that the first direction and the second direction can be selected as needed. For example, in the embodiments of this application, the first direction is parallel to the direction of gravity, and the second direction is perpendicular to the direction of gravity. In other embodiments, the first direction may also be perpendicular to the direction of gravity, and the second direction may be parallel to the direction of gravity. Specifically, this application does not limit this.

[0052] Reference Figures 1 to 3 In one embodiment, the connecting pipe 30 includes a corrugated pipe section 31, with both ends of the corrugated pipe section 31 connected to the pressure relief channel 11 and the pressure venting channel 21, respectively. Thus, the corrugated pipe section 31 possesses good flexibility and extensibility, effectively compensating for minor displacements caused by temperature changes, mechanical vibrations, or installation errors. This means that even if the internal components of the battery pack 100 experience slight movement due to temperature fluctuations or external vibrations, the corrugated pipe section 31 can absorb these displacements, preventing stress concentration or damage at rigid connections. The corrugated pipe section 31 can disperse pressure from different directions within its structure, avoiding potential damage caused by localized high pressure applied directly to the connection point, thus extending the service life of the connecting pipe 30. Compared to traditional rigid pipes, the corrugated pipe section 31 is easier to bend and adjust angles, making installation in complex spatial layouts more convenient and faster. Furthermore, it reduces the need for precise alignment, lowering installation difficulty and technical requirements.

[0053] It should be noted that the material used to manufacture the corrugated pipe section 31 can be selected as needed. For example, the material used to manufacture the corrugated pipe section 31 may include at least one of stainless steel, copper alloy, aluminum, and aluminum alloy. Furthermore, the corrugated pipe section 31 can be directly and fixedly connected to the battery module 20 and the housing 10. Specifically, the corrugated pipe section 31 can be fixed to the battery module 20 and the housing 10 by adhesive bonding or welding. However, this application does not impose any specific limitations on this aspect.

[0054] Reference Figure 4 and Figure 5In one embodiment, the connecting pipe 30 further includes a first connector 32 and a second connector 33. One end of the corrugated pipe section 31 is connected to the pressure relief channel 11 via the first connector 32, and the other end of the corrugated pipe section 31 is connected to the pressure relief channel 21 via the second connector 33. Using the first connector 32 and the second connector 33 ensures a more secure and reliable connection between the corrugated pipe section 31 and the pressure relief channel 11 and 21, which helps prevent loosening or detachment due to vibration, thermal expansion and contraction, etc., ensuring safe and efficient gas transmission. The first connector 32 and the second connector 33 also simplify and expedite the assembly process of the connecting pipe 30, improving overall assembly efficiency.

[0055] It should be noted that there are multiple ways to connect the first connector 32 to the corrugated pipe section 31. For example, in one embodiment, the first connector 32 and the corrugated pipe section 31 can be fixed by adhesive bonding or welding. In another embodiment, the second connector 33 and the corrugated pipe section 31 can be fixed by adhesive bonding or welding.

[0056] Furthermore, the materials used to manufacture the first connector 32 and the second connector 33 can be selected as needed. For example, the materials used to manufacture the first connector 32 and the second connector 33 may include at least one of stainless steel, copper alloy, aluminum, and aluminum alloy. Specifically, this application does not limit this.

[0057] In one embodiment, the first connector 32 is detachably connected to the housing 10. This allows for quick disassembly of the first connector 32 when inspection or repair of the pressure relief channel 11, the bellows section 31, or other related components is required, without the need for extensive disassembly of the entire battery pack 100, thus improving maintenance efficiency. Furthermore, the detachable connection allows for rapid replacement of the first connector 32 if it is damaged.

[0058] It should be noted that in other embodiments, the first connector 32 and the housing 10 can also be fixed by welding. Specifically, this application does not limit this.

[0059] Reference Figure 4 and Figure 5In one embodiment, the connecting pipe 30 further includes a first connecting flange 34, through which the first connector 32 is detachably connected to the housing 10. Thus, using a connecting flange provides a more secure connection point, ensuring a firm and reliable connection between the bellows section 31 and the pressure relief channel 11. Flange connections typically possess high tensile strength and pressure resistance, maintaining good sealing and stability under high pressure environments. The flange connection design simplifies and expedites the assembly and disassembly of the first connector 32 and the housing 10; connection or disconnection can be completed simply by loosening or tightening bolts, eliminating the need for complex tools or processes and significantly improving work efficiency.

[0060] It should be noted that there are multiple ways to detachably connect the first connector 32 to the housing 10. For example, in another embodiment, the first connector 32 and the housing 10 can also be fixed by a snap-fit ​​structure. In yet another embodiment, one of the first connector 32 and the housing 10 may have an internal thread structure, while the other has an external thread structure, with the internal thread structure and the external thread structure threaded together, thereby achieving a detachable connection between the first connector 32 and the housing 10. Specifically, the detachable connection method between the first connector 32 and the housing 10 can be selected as needed, and this application does not limit it in this regard.

[0061] Reference Figure 4 and Figure 5 In one embodiment, the battery pack 100 further includes a plurality of first sealing rings 41, which are sandwiched between the first connecting flange 34 and the second battery module 20b. Thus, the main function of the first sealing rings 41 is to fill the minute gap between the first connecting flange 34 and the second battery module 20b, ensuring that gas does not leak from the connection, thereby improving the safety and reliability of the entire battery pack 100. In actual use, factors such as temperature changes and mechanical vibration may cause minute displacements or deformations between components. The first sealing rings 41 can absorb these displacements, maintaining a long-term stable sealing effect and reducing the risk of leakage due to material fatigue or loosening.

[0062] It should be noted that the first sealing ring 41 can be made of various materials. For example, the first sealing ring 41 can be made of at least one of fluororubber, silicone rubber, EPDM rubber, nitrile rubber, polytetrafluoroethylene, polyurethane, and perfluoroether rubber. Specifically, the material of the first sealing ring 41 can be selected as needed, and this application does not limit it in this regard.

[0063] In one embodiment, the second connector 33 is detachably connected to the battery module 20. This makes the replacement or maintenance of a single battery module 20 very convenient. If a battery module 20 fails (e.g., due to thermal runaway, aging, or damage), it can be removed and replaced with a new module by simply disassembling the second connector 33, without requiring a large-scale disassembly of the entire battery pack 100. This design can significantly reduce downtime when maintenance or replacement is required. The detachable connection supports a modular design, allowing for flexible adjustment of the number or configuration of battery modules 20 according to actual needs. For example, when battery capacity needs to be increased, new battery modules 20 can be easily added; in some scenarios, some modules can also be removed to reduce weight or optimize space layout. During the manufacturing and assembly stages, the detachable connection design makes the connection between the battery module 20 and the connecting pipe 30 easier.

[0064] It should be noted that in other embodiments, the second connector 33 and the battery module 20 can also be fixed by welding. Specifically, this application does not limit this.

[0065] Reference Figure 4 and Figure 5 In one embodiment, the connecting pipe 30 further includes a second connecting flange 35, through which the second connector 33 is detachably connected to the second battery module 20b. Thus, using a connecting flange ensures a more robust and reliable connection between the bellows section 31 and the battery module 20. Flange connections typically possess high tensile strength and pressure resistance, maintaining good sealing and stability under high pressure environments. The flange connection design simplifies and expedites the assembly and disassembly process between the second connector 33 and the battery module 20. Connection or disconnection can be completed simply by loosening or tightening bolts, eliminating the need for complex tools or processes and significantly improving work efficiency.

[0066] It should be noted that there are multiple ways to detachably connect the second connector 33 to the second battery module 20b. For example, in another embodiment, the two connectors and the second battery module 20b can also be fixed by a snap-fit ​​structure. In yet another embodiment, one of the two connectors and the second battery module 20b may have an internal thread structure, while the other has an external thread structure, with the internal thread structure and the external thread structure threaded together, thereby achieving a detachable connection between the two connectors and the second battery module 20b. Specifically, the detachable connection method between the two connectors and the second battery module 20b can be selected as needed, and this application does not limit it in this regard.

[0067] In addition, the first connecting flange 34 and the second connecting flange 35 can be made of various materials. For example, the materials of the first connecting flange 34 and the second connecting flange 35 may include at least one of stainless steel, carbon steel, aluminum alloy, copper and copper alloy. Specifically, this application does not limit the materials of the first connecting flange 34 and the second connecting flange 35.

[0068] Reference Figure 4 and Figure 5 In one embodiment, the battery pack 100 further includes a plurality of second sealing rings 42, which are sandwiched between the second connecting flange 35 and the housing 10. Thus, the main function of the second sealing rings 42 is to fill the minute gaps between the second connecting flange 35 and the housing 10, thereby ensuring that gas does not leak from these joints. This provides crucial airtightness for the entire pressure relief system, preventing high-pressure gas leakage and improving system safety. In actual use, factors such as temperature changes and mechanical vibration may cause minor displacements or deformations between the second connecting flange 35 and the housing 10. The second sealing rings 42 can absorb these displacements, maintaining a long-term stable sealing effect and reducing the risk of leakage due to material fatigue or loosening.

[0069] It should be noted that the second sealing ring 42 can be made of various materials. For example, the material of the second sealing ring 42 may include at least one of fluororubber, silicone rubber, EPDM rubber, nitrile rubber, polytetrafluoroethylene, polyurethane, and perfluoroether rubber. Specifically, the material of the second sealing ring 42 can be selected as needed, and this application does not limit it in this regard.

[0070] Reference Figure 4 In one embodiment, the pressure relief channel 21 includes a first pressure relief section 211, which is located on the side of the battery module 20, making it easy to connect the first pressure relief section 211 to the second connector 33. The pressure discharge channel 11 includes a first pressure discharge section, which is located at the bottom of the housing 10, making it easy to connect the first pressure discharge section to the first connector 32. Both the first connector 32 and the second connector 33 have a connecting channel 36. The connecting channel 36 of the first connector 32 connects the first pressure discharge section and the corrugated pipe section 31, and the connecting channel 36 of the second connector 33 connects the first pressure relief section 211 and the corrugated pipe section 31. The connecting channel 36 of one of the first connector 32 and the second connector 33 is curved. This curved connecting channel 36 prevents the corrugated pipe section 31 from bending during installation, simplifying the installation of the corrugated pipe section 31 and making the structure of the connecting pipe 30 more compact.

[0071] Reference Figure 3 and Figure 4In one embodiment, the connecting channel 36 includes a first channel segment 361 and a second channel segment 362 connected in sequence. The free end of the first channel segment 361 is connected to the first pressure relief section 211 or the first pressure discharge section, and the free end of the second channel segment 362 is connected to the bellows section 31. The extension directions of the first channel segment 361 and the second channel segment 362 are perpendicular to each other. This allows the first connector 32 or the second connector 33 to have a compact structure by making right-angle turns between the first channel segment 361 and the second channel segment 362, reducing the space required for the installation of the connecting pipe 30, and allowing more space within the battery pack 100 to install the battery module 20, thereby increasing the battery pack 100's capacity.

[0072] It should be noted that, referring to Figure 4 In the embodiments of this application, the connecting channel 36 of the second connector 33 is curved. The second connector 33 includes a first connecting pipe segment 331 and a second connecting pipe segment 332 connected sequentially. The first connecting pipe segment 331 extends along a second direction, and the second connecting pipe segment 332 extends along a first direction. A first flow channel segment 361 is formed within the first connecting pipe segment 331, and a second flow channel segment 362 is formed within the second connecting pipe segment 332. This allows the corrugated pipe segment 31 to effectively absorb assembly errors in the first direction (such as minor displacements caused by manufacturing tolerances, installation deviations, or thermal expansion), improving assembly efficiency. Furthermore, the arrangement of the first connecting pipe segment 331 and the second connecting pipe segment 332 facilitates the machining of the connector and saves processing costs. The arrangement of the first connecting pipe segment 331 and the second connecting pipe segment 332 also facilitates the welding of the second connector 33 to the corrugated pipe segment 31 into a single unit.

[0073] Reference Figure 3 and Figure 4In one embodiment, the housing 10 includes a bottom plate 12, side frames 13, and a partition 14. One end of the side frame 13 is connected to the bottom plate 12. The side frame 13 includes a first frame segment 131, a second frame segment 132, and a third frame segment 133 connected in sequence. The first frame segment 131 and the third frame segment 133 are arranged opposite to each other. The partition 14 is disposed inside the side frame 13 and is opposite to and spaced apart from the bottom plate 12. The partition 14 is connected to the first frame segment 131, the second frame segment 132, and the third frame segment 133, so that the partition 14, the first frame segment 131, the second frame segment 132, the third frame segment 133, and the bottom plate 12 form a pressure relief channel 11. In this way, the pressure relief channel 11 is formed, which makes full use of the internal space of the battery pack 100, enhances the structural strength of the housing 10, and can also effectively prevent the side frame 13 from deforming under external impact or internal pressure, thus ensuring the overall stability of the battery pack 100. The pressure relief channel 11 is formed by the partition 14, the first frame section 131, the second frame section 132, the third frame section 133 and the base plate 12. This multi-faceted support structure provides the pressure relief channel 11 with additional rigidity and pressure resistance, ensuring stability even under high pressure.

[0074] Reference Figure 2 and Figure 4 In one embodiment, the pressure relief channel 11 includes a first pressure relief section, a second pressure relief section 112, and a third pressure relief section 113 arranged sequentially. The first pressure relief section is disposed through the partition 14 along the direction of gravity and is connected to one end of a plurality of connecting pipes 30. At least one of the first frame section 131, the second frame section 132, and the third frame section 133 is provided with the third pressure relief section 113, which is adapted to be connected to the outside atmosphere. Thus, since the first pressure relief section is disposed through the partition 14 along the direction of gravity, this design helps to utilize gravity to assist gas in quickly entering the pressure relief channel 11. The first pressure relief section is connected to the plurality of connecting pipes 30, so that the high-pressure gas generated by each battery module 20 can quickly enter the pressure relief channel 11, thereby effectively avoiding the risk of sudden pressure increase and potential explosion caused by gas accumulation. By dividing the pressure relief channel 11 into the first pressure relief section, the second pressure relief section 112, and the third pressure relief section 113, the gas can be guided and dispersed at different stages, reducing local high-pressure areas and further improving the safety of the battery pack 100. The third pressure relief section 113 is adapted to be connected to the outside atmosphere, ensuring that the high-pressure gas discharged from the battery pack 100 can be directly released into the external environment, avoiding the safety hazards caused by the accumulation of harmful gases in the enclosed space.

[0075] It should be noted that the first pressure relief section includes multiple first pressure relief flow paths, each corresponding to and connected to multiple connecting pipes. This ensures that the high-pressure gas generated from each battery module 20 can quickly enter the pressure relief channel 11 through an independent path. This one-to-one design avoids cross-interference in gas flow paths and improves relief efficiency. The design of multiple first pressure relief flow paths allows the gas to be evenly distributed within the pressure relief channel 11, reducing the risk of localized high-pressure areas and thus mitigating potential failures of the battery pack 100 due to uneven pressure.

[0076] Furthermore, the third pressure relief section 113 includes multiple second pressure relief flow paths, which are spaced apart. This arrangement of multiple spaced second pressure relief flow paths ensures the rapid discharge of high-pressure gas within the second pressure relief section 112. Each second pressure relief flow path operates independently, reducing mutual interference in gas flow and improving overall discharge efficiency. The spaced arrangement of multiple second pressure relief flow paths disperses internal pressure at different locations, preventing excessive pressure at a single point from causing structural damage. This design helps extend the service life of the battery pack 100. Additionally, if one second pressure relief flow path becomes blocked or partially fails, the other second pressure relief flow paths can still continue to operate, ensuring the normal operation of the pressure relief system.

[0077] It should be noted that, referring to Figure 2 A pressure relief valve 50 is also installed in the second pressure flow path. In this way, the pressure relief valve 50 serves two purposes: firstly, it acts as a seal, preventing dust or liquid from entering the housing 10 through the second pressure flow path; secondly, the pressure relief valve 50 automatically opens when the internal pressure of the second pressure section 112 exceeds a set value, releasing excess gas and thus preventing the battery pack 100 from exploding or rupturing due to excessive internal pressure in the second pressure section 112.

[0078] Reference Figure 4In one embodiment, the pressure relief channel 21 includes a pressure collection chamber 212 and a connecting vent 213. The battery module 20 includes a housing 22 and multiple battery cells 23. The housing 22 forms the pressure collection chamber 212 and the connecting vent 213. The multiple battery cells 23 are disposed within the housing 22. The explosion-proof valve of each battery cell 23 is adapted to be connected to the pressure collection chamber 212. The connecting vent 213 is connected to the pressure relief channel 11 through multiple connecting pipes 30. In this way, the explosion-proof valve of each battery cell 23 is connected to the pressure collection chamber 212. When a battery cell 23 experiences thermal runaway, the generated high-pressure gas can quickly enter the pressure collection chamber 212 and be discharged through the connecting vent 213, avoiding the risk of sudden pressure increase or explosion due to gas accumulation. In addition, when a cell 23 experiences thermal runaway or other abnormal conditions, it will release high-pressure gas. The manifold, as a large space, can receive and temporarily store this high-pressure gas, which plays a buffering role. This helps to smooth pressure fluctuations and prevent damage to the internal structure of the battery pack 100 due to sudden pressure increases.

[0079] Through the buffering effect of the manifold, high-pressure gas can slowly enter the pressure relief channel 11 through the connecting air passage 213, instead of being discharged directly in a high-speed jet. This reduces the secondary risks caused by rapid discharge and further improves the safety of the battery pack 100. The manifold provides a smooth transition zone for high-pressure gas from the cell 23 to the pressure relief channel 11. Here, the gas speed and pressure are adjusted, making the subsequent gas flow smoother and more orderly, reducing turbulence and resistance, and helping to discharge gas more effectively. The connecting air passage 213 is then connected to the pressure relief channel 11 through multiple connecting pipes 30, forming a multi-stage discharge system, which further optimizes the gas discharge path from a single cell 23 to the outside atmosphere. In addition, the housing 22 not only accommodates multiple cells 23, but also integrates the manifold 212 and the connecting air passage 213, making the entire battery module 20 more compact and efficient. In addition, the presence of the pressure chamber 212 and the connecting air passage 213 can also help remove some heat, especially in high-temperature environments, which helps to improve the temperature distribution inside the battery module 20 and extend the service life of the cell 23.

[0080] Secondly, the embodiments of this utility model also propose an electrical device, which includes a battery pack 100 as described above. The specific structure of the battery pack 100 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0081] It should be noted that the electrical equipment can be vehicles, energy storage power supplies, consumer electronics, medical equipment, or smart cities, etc. Specifically, this application does not limit this.

[0082] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized in that, include: The enclosure has a pressure relief channel that is adapted to connect with the outside atmosphere. Multiple battery modules are disposed within the housing. The multiple battery modules include a first battery module and multiple second battery modules. The first battery module is disposed adjacent to the pressure relief channel. Each battery module forms a pressure relief channel. The pressure relief channel of the first battery module is connected to the pressure relief channel. Multiple connecting pipes are disposed inside the housing, and the pressure relief channel of each second battery module is connected to the pressure relief channel through the connecting pipes.

2. The battery pack according to claim 1, characterized in that, Multiple battery modules are stacked along a first direction; The connecting pipe and the pressure relief channel are arranged along the first direction; The pressure relief channel and the multiple battery modules are arranged along a second direction, which intersects with the first direction.

3. The battery pack according to claim 1, characterized in that, The connecting pipe includes a corrugated pipe section, and the two ends of the corrugated pipe section are respectively connected to the pressure relief channel and the pressure venting channel.

4. The battery pack according to claim 3, characterized in that, The connecting pipe also includes a first connector and a second connector. One end of the corrugated pipe section is connected to the pressure relief channel through the first connector, and the other end of the corrugated pipe section is connected to the pressure relief channel through the second connector.

5. The battery pack according to claim 4, characterized in that, The first connector is detachably connected to the housing; and / or, The second connector is detachably connected to the battery module.

6. The battery pack according to claim 5, characterized in that, The connecting pipe further includes a first connecting flange, and the first connector is detachably connected to the housing via the first connecting flange; and / or The connecting pipe also includes a second connecting flange, and the second connector is detachably connected to the second battery module through the second connecting flange.

7. The battery pack according to claim 6, characterized in that, It also includes multiple first sealing rings, which are sandwiched between the first connecting flange and the second battery module; and / or, The battery pack also includes multiple second sealing rings, which are sandwiched between the second connecting flange and the housing.

8. The battery pack according to claim 4, characterized in that, The pressure relief channel includes a first pressure relief section, which is located on the side of the battery module; The pressure relief channel includes a first pressure relief section, which is located at the bottom of the housing; Both the first connector and the second connector have a connecting channel. The connecting channel of the first connector connects the first pressure relief section and the bellows section, and the connecting channel of the second connector connects the first pressure relief section and the bellows section. The connecting channel of one of the first connectors and the second connector is curved.

9. The battery pack according to any one of claims 1 to 8, characterized in that, The enclosure includes: Base plate; A side frame, one end of which is connected to the base plate, the side frame comprising a first frame segment, a second frame segment, and a third frame segment connected in sequence, the first frame segment and the third frame segment being arranged opposite to each other; A partition is disposed within the side frame and is positioned opposite and spaced apart from the bottom plate. The partition is connected to the first frame segment, the second frame segment, and the third frame segment, such that the partition, the first frame segment, the second frame segment, the third frame segment, and the bottom plate together form the pressure relief channel.

10. The battery pack according to claim 9, characterized in that, The pressure relief channel includes a first pressure relief section, a second pressure relief section, and a third pressure relief section arranged in sequence. The first pressure relief section is arranged to pass through the partition along the direction of gravity and is connected to one end of a plurality of connecting pipes. At least one of the first frame section, the second frame section, and the third frame section is provided with the third pressure relief section, which is adapted to be connected to the outside atmosphere.

11. The battery pack according to any one of claims 1 to 8, characterized in that, The pressure relief channel includes a pressure-collecting chamber and a connecting air passage; The battery module includes: A housing having the pressure chamber and the communicating air passage; Multiple battery cells are disposed within the housing, and the explosion-proof valve of each battery cell is adapted to be connected to the pressure chamber. The connecting air passage is connected to the pressure relief passage through multiple connecting pipes.

12. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 11.

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