Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries. Comprising a bottom plate for defining a containing cavity and a first side wall, and the first side wall is provided with a first flow guide cavity; the support is arranged in the containing cavity and comprises a supporting plate and a connecting plate which form a second flow guide cavity, and a first through hole communicating with the second flow guide cavity is formed in the supporting plate. The battery monomers are arranged in the accommodating cavities and are provided with pressure relief parts, and the first through holes and the pressure relief parts are correspondingly arranged; the first convex part is convexly arranged on one side, facing the battery monomer, of the first side wall along the first direction, and a third flow guide cavity is formed in the first convex part; the connecting plate comprises a body part and a second protruding part, and the second protruding part is arranged on the side, away from the bottom plate, of the first protruding part and overlaps with the first protruding part. The body part comprises a limiting face extending in the third direction. The second protruding part is connected to the side, away from the bottom plate, of the limiting face. The limiting face is matched with the first protruding part for limiting, and the third flow guide cavity communicates with the first flow guide cavity and the second flow guide cavity.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] With the rapid development of mobile phones, laptops, electric vehicles, power tools, and other electronic devices, battery packs with high capacity, long cycle life, and high safety performance have been widely used and developed. At the same time, there is an urgent need for battery packs with even larger capacity, greater durability, and enhanced safety. To facilitate venting, existing battery packs typically have venting brackets installed. However, the current method of installing these brackets usually involves manually flipping the battery pack after the casing (without a bottom plate and open on both the top and bottom sides) is completed, so that the bottom plate is facing upwards. After installing the casing and venting bracket, the bottom plate is then installed, and the casing is flipped again so that the bottom plate is facing downwards before the battery cells can be installed. This process results in a complex overall assembly process and low assembly efficiency. Utility Model Content

[0003] The purpose of this application is to provide a battery pack and electrical device that can solve at least some of the above-mentioned problems in existing devices.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a battery pack having a first direction and a third direction perpendicular to each other. The battery pack includes: a housing, the housing including a bottom plate and a first side wall connected to each other, the first side wall and the bottom plate forming a receiving cavity, the first side wall having a first flow guiding cavity inside; a bracket disposed in the receiving cavity, the bracket including a support plate and a connecting plate connected to each other, the connecting plate connecting between the support plate and the bottom plate to form a second flow guiding cavity between the support plate and the bottom plate, the support plate having a first through hole communicating with the second flow guiding cavity; and a battery cell disposed in the receiving cavity, the battery cell having a pressure relief portion on the side facing the support plate. The first through hole and the pressure relief part are correspondingly provided; a first protrusion protrudes along the first direction and is provided on the side of the first sidewall facing the battery cell, and a third flow guiding cavity is provided inside the first protrusion; wherein, the connecting plate includes a body part and a second protrusion protruding on one side of the body part, and along the third direction, the second protrusion is connected to the side of the first protrusion away from the bottom plate; the body part includes a limiting surface facing the first protrusion, and the limiting surface extends along the third direction; the second protrusion is connected to the side of the limiting surface away from the bottom plate; the limiting surface cooperates with the first protrusion to limit the movement, and the third flow guiding cavity is connected to both the first flow guiding cavity and the second flow guiding cavity.

[0006] Optionally, in this embodiment, the second protrusion includes an end face near the first protrusion, and along the third direction, the end face is connected to one side of the limiting surface; the first protrusion includes a first surface, a second surface, and a third surface that are connected to each other, and along the third direction, the first surface and the third surface are spaced apart and opposite to each other, and the second surface is connected between the first surface and the third surface; along the third direction, at least a portion of the first surface and the end face are stacked, the second surface is in contact with the limiting surface, and the third surface is connected to the base plate; wherein, a second through hole is provided on the first surface, and the second flow guide cavity and the third flow guide cavity are connected through the second through hole.

[0007] Optionally, in this embodiment of the application, the first surface is an inclined surface, along the third direction, and in the direction from the bottom plate to the support plate, and the angle between the first surface and the first sidewall is an acute angle.

[0008] Optionally, in this embodiment of the application, the battery pack further has a second direction, wherein the first direction, the second direction and the third direction are mutually perpendicular; a first limiting groove is provided on the side of the first surface facing the second protrusion, and the first limiting groove communicates with the second through hole; the first limiting groove extends along the third direction, and the second protrusion is accommodated in the first limiting groove.

[0009] Optionally, in this embodiment of the application, a second limiting groove is provided on the bottom wall of the first limiting groove, and the second limiting groove is arranged around the second through hole;

[0010] The second protrusion further includes a limiting protrusion, which is connected to the side of the end face near the first face. The limiting protrusion extends along the second direction, is accommodated in the second limiting groove, and engages with the groove wall of the second limiting groove.

[0011] Optionally, in an embodiment of this application, the first protrusion further includes a fourth surface, which is connected to the side of the first surface away from the second surface. The fourth surface and the second surface are spaced apart and disposed opposite to each other along the first direction, and the fourth surface is attached to or connected to the end of the support plate.

[0012] Optionally, in this embodiment, there are multiple connecting plates, which are arranged along the second direction. Along the second direction, the first through hole and the connecting plate are spaced apart. Two adjacent connecting plates, the support plate, and the bottom plate together form a second flow guide cavity.

[0013] Optionally, in this embodiment of the application, the first protrusion further includes a limiting member, the limiting member being connected to the bottom wall of the first limiting groove, the limiting member being disposed between two adjacent first limiting grooves along the second direction, the limiting member being protruding along the third direction from the bottom wall of the first limiting groove, and the second protrusion being connected to the limiting member.

[0014] Optionally, in this embodiment, the first through hole is a stepped hole, and the battery pack further includes a protective member connected to the wall of the stepped hole, the protective member being disposed between the pressure relief part and the stepped hole.

[0015] Secondly, embodiments of this application also provide an electrical device, including the battery pack as described above.

[0016] One of the above technical solutions has the following advantages or beneficial effects:

[0017] The battery pack of this application includes a housing, a bracket, individual battery cells, and a first protrusion. The bracket includes a support plate and a connecting plate connected to each other. The connecting plate includes a main body and a second protrusion protruding from one side of the main body. The second protrusion is connected to the side of the first protrusion facing away from the base plate. The main body includes a limiting surface facing the first protrusion. The limiting surface cooperates with the first protrusion to limit the bracket, so that the bracket does not need to be flipped during assembly and can be inserted into the box through the opening of the box. Furthermore, the limiting surface and the first protrusion facilitate quick and accurate assembly of the bracket with the first protrusion, reducing assembly time and allowing the bracket to be quickly assembled into the box, improving the assembly efficiency of the battery pack and ultimately increasing the battery pack's production capacity. Moreover, due to accurate assembly, it helps to ensure that in the event of thermal runaway of a battery cell, high-temperature and high-pressure gas flows smoothly from the second guide cavity, through the third guide cavity, and then to the first guide cavity, and is then discharged to the outside of the box. This avoids the situation where the bracket is not properly positioned during "blind assembly" (i.e., assembly based on manual experience), which could affect the venting of the battery pack and help improve the safety performance of the battery pack.

[0018] Meanwhile, this application provides a first protrusion on the housing, with a second protrusion connected to the first protrusion. This allows the first protrusion to support and fix the bracket, increasing the convenience of connecting the bracket to the first side wall of the housing and preventing the bracket from directly connecting to the first side wall of the housing, which would affect the overall sealing performance of the housing. This, in turn, ensures the overall sealing performance of the battery pack, reduces the impact of external components on the components inside the battery pack, extends the service life of the components in the battery pack, extends the service life of the battery pack, and ultimately improves the safety performance of the battery pack. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the battery pack structure in an embodiment of this application;

[0020] Figure 2 This is an exploded structural diagram of the battery pack in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the cooperation structure between the bracket and the first sidewall in an embodiment of this application;

[0022] Figure 4 This is an embodiment of the present application. Figure 3 Enlarged structural diagram at point A;

[0023] Figure 5 This is a schematic diagram of the structure of the first sidewall in an embodiment of this application;

[0024] Figure 6 This is an embodiment of the present application. Figure 5 Enlarged structural diagram at point B;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the battery pack in an embodiment of this application;

[0026] Figure 8 This is a partial structural diagram of the bracket in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Housing; 11. Base plate; 12. First side wall; 101. Receiving cavity; 110. First flow guide cavity; 121. First protrusion; 122. Third flow guide cavity; 1211. First surface; 1212. Second surface; 1213. Third surface; 1214. Fourth surface; 1215. First limiting groove; 1216. Second limiting groove; 1217. Limiting component; 12111. Second through hole; 20. Bracket; 21. Support plate; 22. Connecting plate; 201. Second flow guide cavity; 210. First through hole; 220. Main body; 221. Second protrusion; 2201. Limiting surface; 2210. End face; 30. Battery cell; 301. Pressure relief part; 302. Protective component; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one 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. "Perpendicular" refers to a state where the angle formed by two lines, a line and a surface, or a surface and a surface is 85° to 95°.

[0031] To facilitate venting of the battery pack, existing battery packs are typically equipped with venting brackets. However, the current installation method usually involves manually rotating the casing (without a bottom plate and open on both the top and bottom sides) 180° after its fabrication, so that the position where the bottom plate is to be installed is facing upwards. After the casing and venting bracket are installed, the side wall of the casing is usually directly fixed to the venting bracket with screws, and then the bottom plate is installed with screws. This can easily lead to poor overall sealing of the battery pack. Furthermore, the assembly of the casing and venting bracket is a "blind assembly" (i.e., assembly based on manual experience), which can easily result in improper assembly and affect battery pack venting. Finally, after the bottom plate is installed, the casing is rotated 180° again so that the position where the bottom plate is to be installed is facing downwards before the battery cells can be installed. The overall assembly process of the battery pack is complex and inefficient.

[0032] The battery pack and electrical equipment provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios. This aims to solve at least one of the above-mentioned technical problems.

[0033] See Figures 1 to 8This application provides a battery pack having a first perpendicular direction X and a third perpendicular direction Z. The battery pack includes: a housing 10, which includes a bottom plate 11 and a first side wall 12 connected to each other, and the first side wall 11 and the bottom plate 11 form a receiving cavity 101. A first flow guide cavity 110 is provided inside the first side wall 12; a bracket 20 disposed in the receiving cavity 101, which includes a support plate 21 and a connecting plate 22 connected to each other. The connecting plate 22 is connected between the support plate 21 and the bottom plate 11 to form a second flow guide cavity 201 between the support plate 21 and the bottom plate 11. A first through hole 210 communicating with the second flow guide cavity 201 is provided on the support plate 21; and a battery cell 30 disposed in the receiving cavity 101. The side of the battery cell 30 facing the support plate 21 has a pressure relief part 301. Along the third perpendicular direction Z, the first through hole 210 and the pressure relief part 301 are connected to each other. 01 Corresponding configuration; A first protrusion 121 protrudes along the first direction X and is disposed on the side of the first sidewall 12 facing the battery cell 30. A third flow guiding cavity 122 is provided inside the first protrusion 121. The connecting plate 22 includes a body part 220 and a second protrusion 221 protruding from one side of the body part 220. Along the third direction Z, the second protrusion 221 is connected to the side of the first protrusion 121 away from the bottom plate 11. The second protrusion 221 and the first protrusion 121 are stacked. The body part 220 includes a limiting surface 2201 facing the first protrusion 121. The limiting surface 2201 extends along the third direction Z. Along the third direction Z, the second protrusion 221 is connected to the side of the limiting surface 2201 away from the bottom plate 11. The limiting surface 2201 cooperates with the first protrusion 121 to limit the movement. The third flow guiding cavity 122 is connected to both the first flow guiding cavity 110 and the second flow guiding cavity 201.

[0034] In this embodiment, the first sidewall 12 and the bottom plate 11 enclose a cavity 101, which provides space for the battery cell 30, the support 20, and other components within the battery pack. The first sidewall 12 has a first flow-guiding cavity 110, which guides gas flow. The support 20 includes a support plate 21 and a connecting plate 22. The support plate 21 supports the battery cell 30, and the connecting plate 22 supports the support plate 21. The support plate 21 is arranged along the plane containing the first direction X and the second direction Y, and the connecting plate 22 is arranged along the plane containing the first direction X and the third direction Z. The support plate 21 and the connecting plate 22 also enclose a second flow-guiding cavity 201, which, like the first flow-guiding cavity 110, guides gas flow. The pressure relief section 301 is used to release high-temperature, high-pressure gas when the battery cell 30 experiences thermal runaway. The pressure relief section 301 is positioned facing the support plate 21, and the support plate 21 has a first through hole 210. The pressure relief section 301 and the first through hole 210 are correspondingly positioned. When the battery cell 30 experiences thermal runaway and generates high-temperature and high-pressure gas, the gas flows from the first through hole 210 to the second guide cavity 201. The first protrusion 121 is provided to connect the bracket 20 and the first sidewall 12, and also to connect the first guide cavity 110 and the second guide cavity 201. Specifically, the first protrusion 121 is located on the side of the first sidewall 12 near the battery cell 30, and a third guide cavity 122 is provided inside the first protrusion 121. The third guide cavity 122 connects the first guide cavity 110 and the second guide cavity 201. After the battery cell 30 experiences thermal runaway, the high-temperature and high-pressure gas flows from the second guide cavity 201 through the third guide cavity 122 and then flows to the first guide cavity 110. Furthermore, the connecting plate 22 includes a body portion 220 and a second protrusion 221, with the second protrusion 221 disposed at the end of the body portion 220. Along the third direction Z, the second protrusion 221 is connected to the side of the first protrusion 121 opposite to the base plate 11, and the second protrusion 221 and the first protrusion 121 are stacked. It is understood that the second protrusion 221 is provided to achieve a pressing connection with the first protrusion 121 along the third direction Z. The body portion 220 includes a limiting surface 2201, which extends along the third direction Z. The limiting surface 2201 can fit against the first protrusion 121, and can also abut against the first protrusion 121. The limiting surface 2201 can also be connected to the first protrusion 121 via a connector (e.g., adhesive), thereby achieving a mutual limiting fit between the first protrusion 121 and the limiting surface 2201.

[0035] In this embodiment, the fitting arrangement of the limiting surface 2201 and the first protrusion 121 reduces redundant assembly gaps, thereby reducing the space occupied within the battery pack. This has the beneficial effect of saving space within the battery pack and thus increasing battery energy density, meeting the core requirements of "high energy density and low-cost manufacturing" in the new energy field. The connection between the second protrusion 221 and the first protrusion 121, and the limiting fit between the limiting surface 2201 and the first protrusion 121, enable a "blind assembly" effect between the bracket 20 and the first protrusion 121, saving the operating space (e.g., tool entry and exit) required for traditional adjustments and facilitating assembly. It also improves the assembly accuracy and sealing performance between the bracket 20 and the first protrusion 121. This application has the beneficial effects of saving assembly gaps, simplifying the assembly process, improving assembly accuracy and sealing performance, and thus enhancing battery pack safety.

[0036] Therefore, the battery pack of this application includes a housing 10, a bracket 20, a battery cell 30, and a first protrusion 121. The bracket 20 includes a support plate 21 and a connecting plate 22 connected to each other. The connecting plate 22 includes a main body 220 and a second protrusion 221 protruding from one side of the main body 220. The second protrusion 221 is connected to the side of the first protrusion 121 opposite to the bottom plate 11. The main body 220 includes a limiting surface 2201 facing the first protrusion 121. The limiting surface 2201 cooperates with the first protrusion 121 to limit the bracket 20 so that the housing 10 does not need to be flipped during assembly, and it can be inserted into the housing through the opening of the housing 10. Furthermore, the limiting surface 2201 cooperates with the first protrusion 121 to limit the bracket 20, which facilitates quick and accurate assembly with the first protrusion 121, reducing assembly time and allowing the bracket 20 to be quickly assembled into the housing 10, improving the assembly efficiency of the battery pack and ultimately increasing the production capacity of the battery pack. Moreover, due to the accurate assembly, it helps to ensure that after thermal runaway of the battery cell 30, the high-temperature and high-pressure gas flows smoothly from the second guide cavity 201 through the third guide cavity 122 and then to the first guide cavity 110, and is then discharged to the outside of the housing 10. It also avoids the situation where the bracket 20 is not properly assembled when "blind assembly" (i.e., assembly based on manual experience), which may affect the venting of the battery pack and help improve the safety performance of the battery pack.

[0037] Meanwhile, this application provides a first protrusion 121 on the housing 10, and a second protrusion 221 connected to the first protrusion 121, so that the first protrusion 121 can be used to support and fix the bracket 20, increasing the convenience of connecting the bracket 20 to the first side wall 12 of the housing 10, and avoiding the bracket 20 being directly connected to the first side wall 12 of the housing 10 to avoid affecting the overall sealing performance of the housing 10; thereby ensuring the overall sealing performance of the battery pack, reducing the impact of external components on the components inside the battery pack, extending the service life of the components in the battery pack, extending the service life of the battery pack, and ultimately improving the safety performance of the battery pack.

[0038] Optionally, in this embodiment, the second protrusion 221 includes an end face 2210 near the first protrusion 121. Along the third direction Z, the end face 2210 is connected to one side of the limiting surface 2201. The first protrusion 121 includes a first surface 1211, a second surface 1212, and a third surface 1213 that are connected to each other. Along the third direction Z, the first surface 1211 and the third surface 1213 are spaced apart and arranged opposite to each other. The second surface 1212 is connected between the first surface 1211 and the third surface 1213. Along the third direction Z, at least part of the first surface 1211 and the end face 2210 are stacked. The second surface 1212 is attached to the limiting surface 2201. The third surface 1213 is connected to the base plate 11. A second through hole 12111 is provided on the first surface 1211. The second flow guide cavity 201 and the third flow guide cavity 122 are connected through the second through hole 12111.

[0039] In this embodiment, the second protrusion 221 includes an end face 2210, which is disposed on one side of the limiting surface 2201 along a third direction Z. The limiting surface 2201 is fitted or connected to the first protrusion 121, and the end face 2210 is disposed towards the first protrusion 121. Further, the first protrusion 121 includes a first surface 1211, a second surface 1212, and a third surface 1213 connected in sequence. The first surface 1211 and the third surface 1213 are disposed opposite to each other, while the second surface 1212 is fitted with the limiting surface 2201 to achieve mutual limiting between the first protrusion and the body portion 220. Further still, the first surface 1211 is disposed towards the end face 2210, and the first surface 1211 has a second through hole 12111. The second through hole 12111 is provided to achieve communication between the second guide cavity 201 and the third guide cavity 122. In the event of thermal runaway in a single battery cell 30, the high-temperature, high-pressure gas first enters the second guide cavity 201 through the first through hole 210, then enters the third guide cavity 122 through the second through hole 12111, and finally flows into the first guide cavity 110, thereby releasing the high-temperature, high-pressure gas and preventing the battery pack from exploding. In this embodiment, the second through hole 12111 enables communication between the second guide cavity 201 and the third guide cavity 122, allowing for rapid flow of the high-temperature, high-pressure gas and preventing its accumulation in the second guide cavity 201, thus improving the safety factor of the battery pack. Furthermore, the second through hole 12111 directly utilizes the contact area of ​​the mating surface, i.e., the first surface 1211, eliminating the need for additional pressure relief pipes and saving the height occupied by traditional independent pressure relief valves along the third direction Z. Simultaneously, the first surface 1211 serves both as a supporting structure and as a shared partition connecting the two guide cavities, improving space utilization.

[0040] Optionally, in this embodiment, the first surface 1211 is an inclined surface, along the third direction Z, and in the direction from the bottom plate 11 to the support plate 21. The first surface 1211 is inclined towards the first side wall 12, and the angle between the first surface 1211 and the first side wall 12 is an acute angle.

[0041] In this embodiment, compared to the vertical first surface 1211, the inclined surface allows for the stacking of the second protrusion 221, thereby saving space in the battery pack along the third direction Z. Simultaneously, the inclined surface creates a wedge effect during assembly, allowing the assembly between the first and second protrusions 121 to "slide" into place, whereas the vertical surface requires precise positioning fixtures. Furthermore, the vertical surface may experience sealing failure due to deformation under thermal expansion and contraction conditions, while the inclined surface maintains contact pressure under these conditions, improving the tightness of the connection between the first and second protrusions 121 and 221. The embodiments of this application offer the advantages of improved battery pack sealing and stability, as well as easier assembly.

[0042] Optionally, in this embodiment of the application, the battery pack further has a second direction Y, and the first direction X, the second direction Y and the third direction Z are mutually perpendicular; a first limiting groove 1215 is provided on the side of the first surface 1211 facing the second protrusion 221, and the first limiting groove 1215 communicates with the second through hole 12111; the first limiting groove 1215 extends along the third direction Z, and the second protrusion 221 is accommodated in the first limiting groove 1215.

[0043] In this embodiment of the application, the first limiting groove 1215 is provided to accommodate the second protrusion 221. The arrangement of accommodating the second protrusion 221 in the first limiting groove 1215 has the beneficial effect of improving the tightness of the connection between the first protrusion and the second protrusion. At the same time, accommodating the first limiting protrusion in the first limiting groove 1215 can also save space inside the battery pack, which has the beneficial effect of improving the energy density of the battery pack.

[0044] Optionally, in this embodiment of the application, the bottom wall of the first limiting groove 1215 is provided with a second limiting groove 1216, and the second limiting groove 1216 is arranged around the second through hole 12111; the second protrusion 221 also includes a limiting protrusion, the limiting protrusion is connected to the side of the end face 2210 near the first face 1211, the limiting protrusion extends along the second direction Y, the limiting protrusion is accommodated in the second limiting groove 1216, and the limiting protrusion is engaged with the groove wall of the second limiting groove 1216.

[0045] In this embodiment, the second limiting groove 1216 is configured to engage with the limiting protrusion to form a connection, further enhancing the limiting connection between the first protrusion and the second protrusion, thereby improving the tightness of the connection. Specifically, the provision of the limiting protrusion and the limiting groove, which simultaneously forms mechanical interference in the first direction X, the second direction Y, and the third direction Z, compared to simple planar contact, has the beneficial effect of preventing displacement of the first protrusion 121 and the second protrusion 221. Simultaneously, the surrounding second limiting groove 1216 ensures a uniform force distribution on the limiting protrusion, resisting the torsional torque of the battery pack during vehicle acceleration / braking and preventing rigid deformation.

[0046] Optionally, in this embodiment of the application, the first protrusion 121 further includes a fourth surface 1214, which is connected to the side of the first surface 1211 away from the second surface 1212. The fourth surface 1214 and the second surface 1212 are spaced apart and opposite to each other along the first direction X. The fourth surface 1214 is attached to or connected to the end of the support plate 21.

[0047] In this embodiment, the fourth surface 1214 is provided to limit the support plate 21. Specifically, the fourth surface 1214 is disposed at the end of the first surface 1211 away from the second surface 1212, and the fourth surface 1214 and the second surface 1212 are disposed opposite each other along the first direction X. In practical applications, the fourth surface 1214 faces the end of the support plate 21. Specifically, the end of the support plate 21 can be attached to the fourth surface 1214, or the end of the support plate 21 can abut against the fourth surface 1214, or there can be a small gap between the end of the support plate 21 and the fourth surface 1214, but the small gap can be filled with adhesive to achieve the connection between the support plate 21 and the fourth surface 1214. In this embodiment, the fourth surface 1214 is provided to be attached to or connected to the support plate 21, which has the beneficial effect of further improving the connection strength.

[0048] Optionally, in this embodiment of the application, there are multiple connecting plates 22, and the multiple connecting plates 22 are arranged along the second direction Y. Along the second direction Y, the first through hole 210 and the connecting plate 22 are spaced apart. Two adjacent connecting plates 22, support plate 21 and bottom plate 11 together form the second guide cavity 201.

[0049] In this embodiment, two adjacent connecting plates 22, along with a support plate 21 and a bottom arranged opposite each other along the third direction Z, together form a second flow guiding cavity 201. The misalignment of the connecting plates 22 and the first through hole 210 avoids interference between them, preventing the high-temperature, high-pressure gas flowing out of the first through hole 210 from being blocked by the connecting plates 22, thus affecting the flow of the high-temperature, high-pressure gas into the second flow guiding cavity 201. This embodiment of the application has the beneficial effect of facilitating the rapid flow of depressurized gas from the battery cell 30 to the second flow guiding cavity 201.

[0050] Optionally, in this embodiment of the application, the first protrusion 121 further includes a limiting member 1217, which is connected to the bottom wall of the first limiting groove 1215. Along the second direction Y, the limiting member 1217 is disposed between two adjacent first limiting grooves 1215. The limiting member 1217 protrudes along the third direction Z and is disposed on the bottom wall of the first limiting groove 1215. The second protrusion 221 is connected to the limiting member 1217.

[0051] In this embodiment, the limiting member 1217 is used to space between two adjacent support plates 21. Specifically, one end of the limiting member 1217 is connected to the bottom wall of the first limiting groove 1215, and the other end of the limiting member 1217 is connected to the first limiting groove 1215 in the third direction Z. In practical applications, when the first protrusion and the second protrusion are in contact, the limiting member 1217 is inserted between two adjacent support plates 21 along the first direction X. In this embodiment, when the first protrusion 121 and the second protrusion 221 are in contact, the limiting member 1217 is engaged between the two support plates 21, realizing the connection between the second protrusion 221 and the first protrusion 121, which has the beneficial effect of improving the connection stability of the first protrusion 121 and the second protrusion 221, thereby improving the safety performance of the battery pack.

[0052] Optionally, in this embodiment, the first through hole 210 is a stepped hole, and the battery pack also includes a protective member 302. The protective member 302 is connected to the hole wall of the stepped hole, and the protective member 302 is disposed between the pressure relief part 301 and the stepped hole.

[0053] In this embodiment, the stepped hole provides a recessed mounting for the individual battery cells. The pressure relief section 301 can be appropriately recessed into the first through hole 210, specifically preventing high-temperature, high-pressure gas from leaking out of the first through hole 210 and flowing towards the side of the support plate 21 away from the base plate 11 when the individual battery cell experiences thermal runaway. Furthermore, when the individual battery cell experiences thermal runaway, the high-temperature, high-pressure gas is ejected from the pressure relief section 301 of the individual battery cell, puncturing the protective member 302, and then entering the first guide cavity 110 through the first through hole 210. Since the protective member 302 is connected to the hole wall of the stepped hole, adjacent individual batteries will not be affected by the adjacent thermal runaway individual batteries due to the presence of the protective member 302, thus improving the safety of the battery pack.

[0054] Optionally, in this application embodiment, an electrical device is also provided, including the battery pack as described above.

[0055] In this embodiment, the electrical device includes a battery pack, and therefore all the technical features and beneficial effects of the battery pack are also included in the electrical device, which will not be repeated here. The battery pack serves as the power source for the electrical device. The electrical device may be, but is not limited to, mobile devices (such as mobile phones, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc.

[0056] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0057] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A battery pack having a first direction and a third direction perpendicular to each other, characterized in that, include: The housing includes a bottom plate and a first side wall that are connected to each other. The first side wall and the bottom plate are used to form a receiving cavity. A first flow guide cavity is provided inside the first side wall. A bracket is disposed in the receiving cavity. The bracket includes a support plate and a connecting plate that are connected to each other. The connecting plate is connected between the support plate and the bottom plate to form a second flow guiding cavity between the support plate and the bottom plate. A first through hole communicating with the second flow guiding cavity is provided on the support plate. A battery cell is disposed in the receiving cavity, and the side of the battery cell facing the support plate is provided with a pressure relief part, and the first through hole and the pressure relief part are correspondingly provided; A first protrusion protrudes along the first direction and is disposed on the side of the first sidewall facing the battery cell. A third flow guiding cavity is provided inside the first protrusion. The connecting plate includes a body portion and a second protrusion protruding along one side of the body portion. Along the third direction, the second protrusion is connected to the side of the first protrusion facing away from the bottom plate. The body portion includes a limiting surface facing the first protrusion, and the limiting surface extends along the third direction. The second protrusion is connected to the side of the limiting surface facing away from the bottom plate. The limiting surface cooperates with the first protrusion to limit its movement. The third flow guiding cavity is connected to both the first flow guiding cavity and the second flow guiding cavity.

2. The battery pack according to claim 1, characterized in that, The second protrusion includes an end face close to the first protrusion, and along the third direction, the end face is connected to one side of the limiting surface; The first protrusion includes a first surface, a second surface, and a third surface that are connected to each other. Along the third direction, the first surface and the third surface are spaced apart and opposite to each other, and the second surface is connected between the first surface and the third surface. Along the third direction, at least a portion of the first surface and the end surface are stacked, the second surface is in contact with the limiting surface, and the third surface is connected to the base plate. The first surface has a second through hole, and the second flow guide cavity and the third flow guide cavity are connected through the second through hole.

3. The battery pack according to claim 2, characterized in that, The first surface is an inclined surface, along the third direction, and in the direction from the base plate to the support plate, and the angle between the first surface and the first sidewall is an acute angle.

4. The battery pack according to claim 3, characterized in that, The battery pack also has a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; a first limiting groove is formed on the side of the first surface facing the second protrusion, and the first limiting groove communicates with the second through hole; the first limiting groove extends along the third direction, and the second protrusion is accommodated in the first limiting groove.

5. The battery pack according to claim 4, characterized in that, The bottom wall of the first limiting groove is provided with a second limiting groove, which surrounds the second through hole; The second protrusion further includes a limiting protrusion, which is connected to the side of the end face near the first face. The limiting protrusion extends along the second direction, is accommodated in the second limiting groove, and engages with the groove wall of the second limiting groove.

6. The battery pack according to claim 3, characterized in that, The first protrusion further includes a fourth surface, which is connected to the side of the first surface away from the second surface. The fourth surface and the second surface are spaced apart and arranged opposite to each other along the first direction. The fourth surface is connected to the end of the support plate.

7. The battery pack according to claim 3, characterized in that, The number of connecting plates is multiple, and the multiple connecting plates are arranged along the second direction. Along the second direction, the first through hole and the connecting plate are spaced apart. Two adjacent connecting plates, the support plate and the bottom plate together form a second flow guiding cavity. The first direction, the second direction, and the third direction are all perpendicular to each other.

8. The battery pack according to claim 4, characterized in that, The first protrusion further includes a limiting member, which is connected to the bottom wall of the first limiting groove. Along the second direction, the limiting member is disposed between two adjacent first limiting grooves. The limiting member protrudes along the third direction and is disposed on the bottom wall of the first limiting groove. The second protrusion is connected to the limiting member.

9. The battery pack according to claim 1, characterized in that, The first through hole is a stepped hole, and the battery pack also includes a protective component. The protective component is connected to the hole wall of the stepped hole, and the protective component is disposed between the pressure relief part and the stepped hole.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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