Battery pack and electric equipment

Abstract

The invention provides a battery pack and electric equipment, and the battery pack comprises a housing which is provided with an accommodation space; the battery assembly is accommodated in the accommodating space, and the battery assembly is provided with an exhaust port; the exhaust part is arranged on at least one of the shell and the battery assembly, the exhaust part can move between a first position and a second position, the exhaust part seals the exhaust port under the condition that the exhaust part is located at the first position, and the exhaust port is communicated with the outside of the battery assembly under the condition that the exhaust part is located at the second position. According to the battery pack, the exhaust port of the battery pack can be sealed by the exhaust part, and the exhaust part can open the exhaust port to exhaust air to the outside of the battery pack only when the battery pack generates high-temperature gas due to thermal runaway, so that the explosion-proof and exhaust functions of the battery pack are realized, and meanwhile, the number of parts of the battery pack is reduced; the cost of the battery pack is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery pack and an electrical device including the battery pack. Background Art

[0002] In the prior art, the explosion-proof and exhaust functions of the battery pack can be achieved through two structures. One is to set an independent explosion-proof valve on each battery assembly, and then design a corresponding exhaust port on the battery pack shell. The other is to set an explosion-proof valve on the battery pack shell, and design a corresponding gas channel in the shell for exhaust. In this structure, the explosion-proof valve needs to be sealed with the shell. However, the above two explosion-proof exhaust structures contain a large number of parts, complex structures, and high costs. Explosion-proof and exhaust need to be completed by different parts. Summary of the invention

[0003] One purpose of the present application is to provide a new technical solution for a battery pack, which can at least solve at least one of the problems of the solid line explosion-proof exhaust structure in the prior art, namely, the complex structure and high cost.

[0004] Another object of the present application is to provide an electrical device including the above-mentioned battery pack.

[0005] According to a first aspect of the present application, a battery pack is provided, comprising: a shell having a accommodating space; a battery assembly, the battery assembly being accommodated in the accommodating space, the battery assembly having an exhaust port; an exhaust member, the exhaust member being provided on at least one of the shell and the battery assembly, the exhaust member being movable between a first position and a second position; wherein, when the exhaust member is in the first position, the exhaust member seals the exhaust port, and when the exhaust member is in the second position, the exhaust port is connected to the outside of the battery assembly.

[0006] Optionally, the battery assembly has a mating surface, the exhaust port is arranged on the mating surface, and when the exhaust member is in the first position, the exhaust member cover is arranged at the exhaust port, and the orthographic projection of the exhaust member on the mating surface covers the exhaust port.

[0007] Optionally, when the vent is in the second position, at least a portion of the vent is spaced apart from the mating surface.

[0008] Optionally, the exhaust member includes: a cover body, which is movably disposed on the shell or the battery assembly; a sealing member, which is disposed on the side of the cover body facing the mating surface; when the exhaust member is in the first position, the cover body is close to the mating surface and presses the sealing member against the mating surface, and when the exhaust member is in the second position, the cover body is away from the mating surface to separate the sealing member from the mating surface.

[0009] Optionally, a sealing member is provided on the mating surface, and the exhaust member includes: a cover body, which is movably provided on the shell or the battery assembly; when the exhaust member is in the first position, the cover body is close to the mating surface and presses against the sealing member, and when the exhaust member is in the second position, the cover body is away from the mating surface and separated from the sealing member.

[0010] Optionally, the cover body is a spring sheet, and in a free state, the spring sheet is inclined toward the accommodating space.

[0011] Optionally, the spring sheet includes: a sheet body, which is arranged opposite to the seal; an elastic connecting portion, which is connected between the sheet body and the shell, or between the sheet body and the battery assembly, and the elastic connecting portion can be deformed to at least drive the sheet body away from the mating surface.

[0012] Optionally, the sealing member is annular in shape, and an orthographic projection of the sealing member on the mating surface surrounds the exhaust port.

[0013] Optionally, the sealing element is a vulcanized sealing ring.

[0014] Optionally, the shell is provided with an exhaust hole and an isolation portion, the exhaust hole passes through the inner wall surface and the outer surface of the shell, the isolation portion isolates the exhaust hole from the accommodating space, and when the exhaust member is in the second position, the exhaust hole is connected to the exhaust port.

[0015] Optionally, the shell is provided with an exhaust hole and an isolation portion, the exhaust hole passes through the inner wall surface and the outer surface of the shell, the isolation portion isolates the exhaust hole from the accommodating space, and when the exhaust member is in the second position, the exhaust hole is connected to the exhaust port.

[0016] Optionally, the exhaust member is movably connected to an inner wall surface of the exhaust hole, and when the exhaust member is in the first position, the exhaust member is accommodated in the exhaust hole.

[0017] Optionally, the isolating portion is a convex portion, which is disposed on the inner wall surface of the shell and protrudes into the accommodating space, the exhaust hole passes through the convex portion, and the convex portion abuts against the outer surface of the battery assembly.

[0018] Optionally, the shell includes: a tray having a receiving groove suitable for receiving the battery assembly; a cold plate, wherein the cold plate cover is arranged at the notch of the receiving groove and encloses the tray to define the receiving space; wherein the exhaust member is arranged on at least one of the tray or the cold plate.

[0019] Optionally, the cold plate includes: a substrate, the substrate cover is arranged at the notch of the accommodating groove, and the exhaust member is arranged on the substrate; a flow channel plate, the flow channel plate is connected to the side of the substrate away from the tray, the flow channel plate cooperates with the substrate to define an exhaust channel, and when the exhaust member is in the second position, the exhaust channel connects the exhaust port and the outside of the battery pack.

[0020] Optionally, the flow channel plate is provided with a groove with both ends open, the groove is recessed toward the side away from the substrate, the notch of the groove is opposite to the exhaust member, and the inner wall surface of the groove and the side surface of the substrate facing the flow channel plate together form the exhaust channel.

[0021] Optionally, the number of the battery assemblies and the number of the exhaust members are both plural, and the exhaust ports on the multiple battery assemblies correspond one-to-one to the multiple exhaust members.

[0022] According to a second aspect of the present application, there is provided an electrical device comprising a battery pack as described in any one of the above embodiments.

[0023] According to the battery pack of the present application, an exhaust member is provided on the shell, and an exhaust port is provided on the battery assembly. When the battery assembly is in normal working state, the exhaust member can be used to seal the exhaust port of the battery assembly. Only when the battery assembly generates high-temperature gas due to thermal runaway, the exhaust member can open the exhaust port to exhaust gas outside the battery assembly. Compared with the traditional technology of providing an explosion-proof valve on the battery assembly, the exhaust member is provided on the shell, and the displacement of the exhaust member itself is used to achieve the closing and opening of the exhaust port. While achieving the explosion-proof and exhaust functions of the battery pack, it is also beneficial to reduce the number of parts of the battery pack and reduce the cost of the battery pack.

[0024] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0026] Figure 1 is a three-dimensional diagram of a battery pack according to an embodiment of the present application;

[0027] Figure 2 is a top view of a battery pack according to an embodiment of the present application;

[0028] Figure 3 is along Figure 2 Sectional view along the midline BB;

[0029] Figure 4 yes Figure 3 An enlarged view of the circled portion at A in the middle when the exhaust member is in the first position;

[0030] Figure 5 yes Figure 3 An enlarged view of the circled portion at A in the middle when the exhaust member is in the second position;

[0031] Figure 6 is a cross-sectional view of a portion of the structure of a cold plate in a battery pack according to an embodiment of the present application;

[0032] Figure 7 is a three-dimensional diagram of a tray and a battery assembly in a battery pack according to an embodiment of the present application;

[0033] Figure 8 yes Figure 7 The enlarged view of the circled part at B in the middle;

[0034] Fig. 9 is a perspective view of a cold plate in a battery pack according to an embodiment of the present application;

[0035] Fig.10 is a three-dimensional diagram of a cold plate in a battery pack according to an embodiment of the present application from another perspective;

[0036] Fig.11 yes Fig.10 The enlarged view of the circled part at C in the middle;

[0037] Fig.12 It is a stereoscopic view of a flow channel plate in a battery pack according to an embodiment of the present application.

[0038] Reference numerals

[0039] Battery pack 100;

[0040] Shell 10; tray 11; receiving groove 111; cold plate 12; substrate 121; flow channel plate 122; exhaust channel 123; groove 124; flow channel 125; receiving space 13; exhaust hole 14; isolation portion 15;

[0041] Exhaust member 20; cover body 21; sheet body 211; elastic connecting portion 212; arc surface 213; sealing member 22;

[0042] Battery assembly 30; exhaust port 31; mating surface 32. DETAILED DESCRIPTION

[0043] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0044] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0045] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0046] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0047] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0048] The following first describes in detail the battery pack 100 according to the embodiment of the present application with reference to the drawings.

[0049] like Figures 1 to 12 As shown, the battery pack 100 according to the embodiment of the present application includes: a housing 10 and a battery assembly 30 .

[0050] Specifically, the housing 10 has a storage space 13. The battery assembly 30 is stored in the storage space 13, and the battery assembly 30 has an exhaust port 31. The exhaust member 20 is provided on at least one of the housing 10 and the battery assembly 30, and the exhaust member 20 is movable between a first position and a second position. When the exhaust member 20 is in the first position, the exhaust member 20 seals the exhaust port 31, and when the exhaust member 20 is in the second position, the exhaust port 31 is connected to the outside of the battery assembly.

[0051] In other words, the battery pack 100 according to the embodiment of the present application is mainly composed of a housing 10 and a battery assembly 30 .

[0052] Among them, a housing 10 may be provided with a housing space 13, which may be a relatively closed space, and a battery assembly 30 may be provided in the housing space 13, and the battery assembly 30 may be packaged by one or more battery cells. The battery assembly 30 may be provided with an air outlet, which may be connected to the space inside the battery assembly 30. When thermal runaway occurs inside the battery assembly 30, high-temperature gas may be generated, and the provision of the air outlet may allow high-speed gas to flow out of the battery assembly 30.

[0053] The housing 10 and / or the battery assembly may be provided with a vent 20, which may specifically include but is not limited to the following:

[0054] In case 1, the exhaust member 20 can be disposed on the housing 10 , which is beneficial to simplify the structure of the battery assembly 30 ;

[0055] In case 2, the exhaust member 20 can be disposed on the battery assembly 30, which is beneficial to simplify the structure of the housing 10;

[0056] In case three, the exhaust member 20 may be connected to the housing 10 and the battery assembly 30 respectively. For example, the exhaust member 20 may include a plurality of structures, some of which may be disposed on the housing 10 , and others may be disposed on the battery assembly 30 .

[0057] It should be noted that the exhaust member 20 may be directly connected to the housing 10 and / or the battery assembly 30 or indirectly connected, which is not limited here. In the case of indirect connection, the exhaust member 20 may be connected to the housing 10 and / or the battery assembly 30 through some other structures.

[0058] The exhaust member 20 is movable relative to the housing 10. The exhaust member 20 can be switched between a first position and a second position during the movement.

[0059] Under normal circumstances, that is, the battery assembly 30 is in normal working condition, the internal and external pressures of the battery assembly 30 are roughly the same, and the exhaust member 20 can be in the first position. At this time, the exhaust member 20 can seal the exhaust port 31. In other words, the exhaust member 20 can be sealed and connected to the battery assembly 30, so that a sealed chamber is formed in the battery assembly 30, and the interior of the battery assembly 30 is separated from the accommodating space 13.

[0060] When thermal runaway occurs in the battery assembly 30, the high-temperature gas generated by the thermal runaway will make the pressure inside the battery assembly 30 greater than the pressure outside the battery assembly 30, so that the exhaust member 20 can be in the second position. At this time, the exhaust port 31 can be connected to the outside of the battery assembly 30, so that the high-temperature gas can flow from the exhaust port 31 to the outside of the battery assembly 30 to reduce the pressure inside the battery assembly 30.

[0061] Therefore, according to the battery pack 100 of the embodiment of the present application, the exhaust member 20 is provided on the housing 10, and the exhaust port 31 is provided on the battery assembly 30. When the battery assembly 30 is in a normal working state, the exhaust member 20 can be used to seal the exhaust port 31 of the battery assembly 30. Only when the battery assembly 30 thermally runs away and generates high-temperature gas, the exhaust member 20 can open the exhaust port 31 to exhaust gas outside the battery assembly 30. Compared with the conventional technology of providing an explosion-proof valve on the battery assembly 30, the exhaust member 20 is provided on the housing 10, and the displacement of the exhaust member 20 itself is used to achieve the closing and opening of the exhaust port 31. While achieving the explosion-proof and exhaust functions of the battery pack 100, it is also beneficial to reduce the number of parts of the battery pack 100 and reduce the cost of the battery pack 100.

[0062] According to one embodiment of the present application, the battery assembly 30 has a mating surface 32, and the exhaust port 31 is arranged on the mating surface 32. When the exhaust member 20 is in the first position, the exhaust member 20 cover is arranged at the exhaust port 31, and the orthographic projection of the exhaust member 20 on the mating surface 32 covers the exhaust port 31.

[0063] Specifically, the exhaust port 31 of the battery assembly 30 is arranged on its own mating surface 32, and the mating surface 32 can be any surface on the battery assembly 30. For example, the battery assembly 30 can be roughly in the shape of a cuboid, and the outer surface of the cuboid battery assembly 30 can include six planes, and the mating surface 32 can be any one of the six planes. The exhaust member 20 can be arranged opposite to the exhaust port 31 on the mating surface 32, that is, according to the different positions of the exhaust port 31 on the battery assembly 30, the position of the exhaust member 20 on the housing 10 of the battery pack 100 can be adjusted accordingly.

[0064] When the exhaust member 20 is in the first position, the exhaust member 20 can be covered at the exhaust port 31. It should be noted that the exhaust member 20 covering the exhaust port 31 can be a sealed connection between the exhaust member 20 and the mating surface 32, or the exhaust member 20 can extend into the exhaust port 31 and be sealed with the inner wall surface of the through hole where the exhaust port 31 is located. This is not limited here.

[0065] In addition, when the exhaust member 20 is in the first position, the orthographic projection of the exhaust member 20 on the mating surface 32 can cover the exhaust port 31 , that is, the exhaust member 20 can completely cover the exhaust port 31 and isolate the exhaust port 31 from the outside of the battery assembly 30 .

[0066] In some optional embodiments, a side of the exhaust member 20 facing the exhaust port 31 can be a sealing surface. When the exhaust member 20 is in the first position, the sealing surface can be sealed with the mating surface 32, and the sealing surface covers the entire exhaust port 31, so that the exhaust port 31 can be sealed.

[0067] In some other embodiments, the side of the exhaust member 20 facing the exhaust port 31 may have a groove structure. When the exhaust member 20 is in the first position, since the exhaust member 20 covers the exhaust port 31, the groove structure can form an enclosed chamber with the space through the exhaust port 31 and the battery assembly 30.

[0068] In this embodiment, the exhaust member 20 is provided to cover the exhaust port 31, so that the exhaust member 20 is equivalent to forming a movable cover structure, which can cover and seal the exhaust port 31 when the battery assembly 30 is working normally. The exhaust member 20 has a simple structure, low cost, and good sealing performance.

[0069] According to some other embodiments of the present application, when the exhaust member 20 is in the second position, at least a portion of the exhaust member 20 is spaced apart from the mating surface 32 .

[0070] In other words, when the battery assembly 30 is in thermal runaway, the exhaust member 20 can be pushed open so that the internal space of the battery assembly 30 can be directly connected to the outside of the battery pack 100. Specifically, when the exhaust member 20 is in the second position, a gap can be formed between a portion of the exhaust member 20 and the mating surface 32, and the gap can connect the exhaust port 31 and the outside of the battery assembly 30, or the exhaust member 20 can be completely separated from the mating surface 32, so that the exhaust port 31 can be directly connected to the outside of the battery assembly 30.

[0071] Therefore, the battery pack 100 of this embodiment can drive the exhaust member 20 to move by utilizing the internal and external pressure difference generated when the battery assembly 30 thermally runs away, thereby achieving automatic pressure relief.

[0072] In some specific embodiments of the present application, the exhaust member 20 includes a cover 21 and a sealing member 22. The cover 21 is movably disposed on the housing 10 or the battery assembly 30, and the sealing member 22 is disposed on a side of the cover 21 facing the mating surface 32. When the exhaust member 20 is in the first position, the cover 21 is close to the mating surface 32 and presses the sealing member 22 against the mating surface 32, and when the exhaust member 20 is in the second position, the cover 21 is away from the mating surface 32 to separate the sealing member 22 from the mating surface 32.

[0073] Specifically, the exhaust member 20 of this embodiment can be mainly composed of a cover 21 and a sealing member 22. The cover 21 can be movably connected to the housing 10, or the cover 21 can be movably connected to the outer shell of the battery assembly 30.

[0074] The seal 22 may be connected to a side surface of the cover 21 facing the mating surface 32, that is, the seal 22 may be arranged opposite to the mating surface 32. The movement of the cover 21 may drive the movement of the seal 22. For example, the cover 21 and the seal 22 may be fixedly connected, and the cover 21 and the seal 22 may move synchronously.

[0075] When the exhaust member 20 is in the first position, the distance between the cover body 21 and the mating surface 32 is relatively close, and the cover body 21 can press the sealing member 22 against the mating surface 32, so that a seal can be formed between the sealing member 22 and the mating surface 32 to prevent external water vapor, dust, etc. from entering the battery assembly 30 through the exhaust port 31.

[0076] When the exhaust member 20 is in the second position, the distance between the cover 21 and the mating surface 32 is relatively far, that is, when the exhaust member 20 moves from the first position to the second position, the cover 21 moves away from the mating surface 32. When the cover 21 moves away from the mating surface 32, the sealing member 22 is also driven away from the mating surface 32, so that the sealing member 22 can be separated from the mating surface 32, so that the exhaust port 31 can be directly connected to the outside of the battery assembly 30.

[0077] In this embodiment, the seal 22 is disposed on the cover 21, so that the seal 22 is driven by the cover 21 to move closer to or farther from the mating surface 32 to open or close the exhaust port 31. The structures for controlling the opening and closing of the exhaust port 31 are integrated on the housing 10 of the battery pack 100, which is conducive to reducing the number of parts of the battery assembly 30 and simplifying the processing of the battery assembly 30. The structures for controlling the opening and closing of the exhaust port 31 are integrated on the outer shell of the battery assembly 30, which is conducive to simplifying the structure of the housing 10.

[0078] In some optional embodiments, when the exhaust member 20 is in the second position, the exhaust port 31 can be directly connected to the outside of the battery pack 100, eliminating the need to design a gas channel in the shell 10, which is beneficial to simplifying the structure of the shell 10, and the high-temperature gas can flow directly to the outside of the battery pack 100, which can prevent the high-temperature gas from affecting other battery components 30 inside the shell 10 and causing thermal runaway of other battery components 30.

[0079] According to some other optional embodiments of the present application, a sealing member 22 is provided on the mating surface 32, and the exhaust member 20 includes a cover 21, which is movably provided on the housing 10 or the battery assembly 30. When the exhaust member 20 is in the first position, the cover 21 is close to the mating surface 32 and presses against the sealing member 22, and when the exhaust member 20 is in the second position, the cover 21 is away from the mating surface 32 and separated from the sealing member 22.

[0080] Specifically, the seal 22 can be connected to the mating surface 32 , the cover 21 can be movably connected to the shell 10 , or the cover 21 can be movably connected to the outer shell of the battery assembly 30 .

[0081] When the exhaust member 20 is in the first position, the cover 21 can abut against the sealing member 22 to form a seal, thereby closing the exhaust port 31. When the exhaust member 20 is in the second position, the cover 21 can be away from the mating surface 32, so that the cover 21 and the sealing member 22 can be spaced apart, and the exhaust port 31 can be communicated with the outside of the battery assembly 30.

[0082] In this embodiment, the seal 22 is arranged on the mating surface 32 of the battery assembly 30, so that the exhaust member 20 can be sealed with the mating surface 32. The cover 21 is arranged on the housing 10, which can reduce the number of parts of the battery assembly 30 and simplify the processing of the battery assembly 30. The cover 21 is arranged on the battery assembly 30, which can simplify the structure of the housing 10.

[0083] In some other optional embodiments, the seal 22 and the mating surface 32, as well as the seal 22 and the cover body 21 can be non-fixed connections. When the exhaust member 20 is in the first position, the cover body 21 and the mating surface 32 can clamp the seal 22 so that the seal 22 plays a sealing role, and at the same time, the clamping force is used to limit the seal 22.

[0084] According to some optional embodiments of the present application, the cover body 21 is a spring sheet, and in a free state, the spring sheet is inclined toward the accommodating space 13 .

[0085] The spring piece may be elastic. It should be noted that after being lifted up by the high-temperature gas, the spring piece may undergo elastic deformation or plastic deformation. In other words, when the internal pressure of the battery assembly 30 reaches equilibrium, the spring piece may or may not be reset, which is not limited here.

[0086] When the spring is in a free state, for example, when the battery assembly 30 is not installed in the shell 10, the spring is not subjected to external force, and the spring can extend obliquely toward the accommodating space 13. In other words, the spring can be in a pressed state, and the spring can extend in a direction opposite to the exhaust direction of the exhaust port 31.

[0087] When the exhaust member 20 is in the first position, the spring piece may have a tendency to move toward the accommodating space 13. Therefore, the spring piece may exert a force toward the mating surface 32 on the sealing member 22 to clamp the sealing member 22 in cooperation with the mating surface 32. At the same time, the battery assembly 30 may limit the spring piece so that the spring piece cannot continue to be compressed and bounced toward the accommodating space 13.

[0088] When the exhaust member 20 is in the second position, the high-temperature gas in the battery assembly 30 can overcome the elastic force of the spring sheet to push the spring sheet open, causing the spring sheet to deform in the opposite direction, that is, to deform toward the side away from the mating surface 32 .

[0089] In this embodiment, the cover 21 is set as an elastic sheet, which can accurately compress the seal 22, and when the elastic sheet bounces up, it can drive the seal 22 to bounce up together. In addition, the elastic sheet deforms into the accommodation space 13 in a free state, which can prevent the high-temperature gas in the battery assembly 30 with thermal runaway from being discharged through the exhaust port 31 thereon, so that the high-temperature gas pushes the elastic sheets corresponding to other battery assemblies 30 that are not in thermal runaway into the housing 10, and enters other battery assemblies 30 to cause thermal runaway of other battery assemblies 30, which is beneficial to improving the safety of the battery pack 100.

[0090] According to some other embodiments of the present application, the elastic sheet includes a sheet body 211 and an elastic connection portion 212. The sheet body 211 is arranged opposite to the seal 22. The elastic connection portion 212 is connected between the sheet body 211 and the housing 10, or the elastic connection portion 212 is connected between the sheet body 211 and the battery assembly 30. The elastic connection portion 212 can be deformed to at least drive the sheet body 211 away from the mating surface 32.

[0091] Specifically, the elastic sheet of this embodiment may be mainly composed of a sheet body 211 and an elastic connecting portion 212 , the first side surface of the sheet body 211 may face the mating surface 32 , and the second side surface of the sheet body 211 may face the side away from the mating surface 32 .

[0092] The sheet body 211 may be disposed opposite to the sealing member 22 . For example, the sealing member 22 may be disposed on a first side surface of the sheet body 211 , or the sealing member 22 may be disposed on the mating surface 32 and opposite to the first side surface of the sheet body 211 .

[0093] When the exhaust member 20 is disposed on the shell 10 , the sheet 211 and the shell 10 may be connected via the elastic connecting portion 212 ; when the exhaust member 20 is disposed on the battery assembly 30 , the sheet 211 and the outer shell of the battery assembly 30 may be connected via the elastic connecting portion 212 .

[0094] The elastic connection part 212 may be elastic, and the elastic connection part 212 itself may be deformed to drive the sheet 211 to move. It should be noted that the deformation of the elastic connection part 212 may be plastic deformation, in which case the elastic connection part 212 may make the sheet 211 away from the mating surface 32, and the elastic connection part 212 cannot be reset after deformation. The deformation of the elastic connection part 212 may also be elastic deformation, in which case the elastic connection part 212 may drive the sheet 211 to approach or away from the mating surface 32, and the elastic connection part 212 may be reset after the spring sheet is pushed open.

[0095] In some specific embodiments, the thickness of the elastic connection portion 212 may be smaller than the thickness of the sheet body 211 , so that when the sheet body 211 is squeezed by high-temperature gas, the spring sheet may begin to deform from the elastic connection portion 212 , which is helpful for controlling the deformation position of the spring sheet.

[0096] like Figures 4 to 6 As shown, the elastic connection portion 212 may be substantially S-shaped, and the elastic connection portion 212 may include two bending sections, wherein one bending section may protrude toward the inside of the housing 10 , and the other bending section may protrude toward the outside of the housing 10 .

[0097] In some optional embodiments, the elastic connection portion 212 may be substantially U-shaped, and the U-shaped elastic connection portion 212 may protrude toward the inside of the shell 10 or toward the outside of the shell 10, which is not limited here.

[0098] According to some optional embodiments of the present application, the seal 22 is annular, and the orthographic projection of the seal 22 on the mating surface 32 surrounds the exhaust port 31. In other words, the seal 22 can be a sealing ring, and when the exhaust member 20 is in the first position, the seal 22 can surround the exhaust port 31, which is conducive to sealing the exhaust port 31 when the seal 22 cooperates with the mating surface 32 and the cover body 21 to prevent air leakage.

[0099] In some other optional embodiments, the sealing ring can be in a circular shape, the exhaust port 31 can be circular, and the inner diameter of the sealing ring can be larger than the diameter of the exhaust port 31, so that when the exhaust member 20 is covered on the mating surface 32, the sealing ring and the cover body 21 can completely cover the exhaust port 31 to prevent air leakage.

[0100] In some specific embodiments of the present application, Fig.11 As shown, the end face of the sheet body 211 away from the elastic connection part 212 has an arcuate surface 213, and the arcuate surface 213 protrudes in a direction away from the elastic connection part 212. The end of the sheet body 211 away from the elastic connection part 212 can be adapted to the annular sealing ring.

[0101] According to some other embodiments of the present application, the seal 22 is a vulcanized seal ring. Specifically, the seal 22 can be integrally formed on the spring sheet through a vulcanization process, which is conducive to improving the sealing between the seal 22 and the spring sheet, and the connection reliability between the seal 22 and the spring sheet is high, and the seal 22 is not easy to fall off from the spring sheet.

[0102] In some specific embodiments of the present application, an exhaust hole 14 and an isolation portion 15 are provided on the shell 10. The exhaust hole 14 passes through the inner wall surface and the outer surface of the shell 10. The isolation portion 15 isolates the exhaust hole 14 from the accommodating space 13. When the exhaust member 20 is in the second position, the exhaust hole 14 is connected to the exhaust port 31.

[0103] Specifically, the housing 10 may be provided with an exhaust hole 14, which may be arranged opposite to the exhaust port 31 on the battery assembly 30, and the exhaust hole 14 may penetrate the inside and outside of the housing 10 along the wall thickness direction of the housing 10. When the exhaust member 20 is in the second position, the exhaust member 20 is pushed open, and the exhaust hole 14 may be connected with the exhaust port 31, so that the high-temperature gas in the battery assembly 30 can flow to the outside of the battery pack 100 through the exhaust port 31 and the exhaust hole 14.

[0104] The shell 10 may also be provided with an isolation portion 15, which can isolate the exhaust hole 14 from the accommodation space 13 to prevent high-temperature gas from entering the accommodation space 13 through the exhaust hole 14, thereby adversely affecting other battery components 30 and causing thermal runaway of other modules.

[0105] According to some optional embodiments of the present application, the exhaust member 20 is movably connected to the inner wall surface of the exhaust hole 14. When the exhaust member 20 is in the first position, the exhaust member 20 is accommodated in the exhaust hole 14. For example, the elastic connection portion 212 can be connected to the inner wall surface of the exhaust hole 14.

[0106] Therefore, when the battery assembly 30 works normally, the exhaust member 20 may not protrude from the outer surface of the shell 10, which is beneficial to reducing the volume of the battery pack 100 and facilitating the layout of the battery pack 100 on the electrical equipment.

[0107] In some other embodiments, the exhaust member 20 may be movably connected to the outer wall of the shell 10 , and when the exhaust member 20 is in the first position, a portion of the exhaust member 20 may extend into the exhaust hole 14 and seal the exhaust port 31 .

[0108] According to some other embodiments of the present application, the isolating portion 15 is a convex portion, which is arranged on the inner wall surface of the shell 10 and protrudes into the accommodating space 13 , and the exhaust hole 14 passes through the convex portion, which abuts against the outer surface of the battery assembly 30 .

[0109] Specifically, a convex portion may be provided on the inner wall surface of the housing 10, and the convex portion may protrude toward the accommodating space 13 and abut against the outer surface of the battery assembly 30. For example, one end of the convex portion away from the inner wall surface of the housing 10 may abut against the mating surface 32. The exhaust hole 14 may penetrate the convex portion so that the convex portion is roughly annular. The annular convex portion may be arranged around the exhaust port 31. When the exhaust member 20 is in the first position, the annular convex portion may be arranged around the outer peripheral side of the annular sealing member 22.

[0110] In this embodiment, the convex portion is used to isolate the accommodation space 13 and the exhaust hole 14, so that the high-temperature gas can be prevented from entering the accommodation space 13, and the high-temperature gas can directly flow to the outside of the battery pack 100 through the exhaust hole 14. In addition, the structure of the convex portion is simple and easy to manufacture. The convex portion and the exhaust member 20 are integrated on the housing 10, which is conducive to reducing the parts of the battery assembly 30 and simplifying the structure of the battery assembly 30.

[0111] Optionally, the protrusion and the shell 10 may be an integrally formed part, whereby the protrusion and the shell 10 may both be metal structures, and a hard seal may be formed between the protrusion and the outer surface of the battery assembly 30 .

[0112] In some other optional embodiments, the protrusion may be a sealing ring.

[0113] In some optional embodiments, the insulating portion 15 may be an inner wall surface on the shell 10 on which the exhaust hole 14 is provided, and the inner wall surface may abut against the mating surface 32 of the battery assembly 30 to prevent the exhaust hole 14 from being connected to the accommodation space 13 in the shell 10, thereby preventing high-temperature gas generated by thermal runaway from entering the accommodation space 13 and affecting other battery assemblies 30 that are not in thermal runaway.

[0114] In some specific embodiments of the present application, the housing 10 includes a tray 11 and a cold plate 12. The tray 11 has a receiving groove 111 suitable for receiving the battery assembly 30, and the cold plate 12 is covered at the notch of the receiving groove 111 and encloses the tray 11 to define a receiving space 13. The exhaust member 20 is provided on at least one of the tray 11 or the cold plate 12.

[0115] In other words, the housing 10 of the present embodiment may be mainly composed of a tray 11 and a cold plate 12, wherein the tray 11 may have a receiving groove 111, and the battery assembly 30 may be installed in the receiving groove 111. Specifically, the tray 11 may be composed of a bottom plate and four side plates, the battery assembly 30 may be carried on the bottom plate, and the four side plates surround the bottom plate and form a notch of the receiving groove 111.

[0116] The cold plate 12 may cover the notch of the receiving groove 111 , and a side of the cold plate 12 facing the tray 11 and the receiving groove 111 on the tray 11 may enclose a receiving space 13 .

[0117] The exhaust member 20 may be disposed on the tray 11 or on the cold plate 12, or there may be multiple exhaust members 20, and multiple exhaust members 20 may be disposed on the tray 11 and the cold plate 12, respectively. As long as the exhaust member 20 corresponds to the position of the exhaust port 31 on the battery assembly 30, the exhaust member 20 may be used to control the opening and closing of the exhaust port 31.

[0118] In some specific embodiments, the housing 10 may be roughly rectangular, and the inner wall surface of the housing 10 may include two large surfaces arranged opposite to each other. The bottom surface of the receiving groove 111 on the tray 11 may be formed as one of the two large surfaces, and the side surface of the cold plate 12 facing the tray 11 may be formed as the other of the two large surfaces. The exhaust port 31 on the battery assembly 30 may be opposite to one or more of the two large surfaces, so that each battery assembly 30 can be connected to the outside of the battery pack 100 through the exhaust port 31 and the exhaust member 20.

[0119] According to some optional embodiments of the present application, the cold plate 12 includes a substrate 121 and a flow channel plate 122. The substrate 121 cover is arranged at the notch of the receiving groove 111, and the exhaust member 20 is arranged on the substrate 121. The flow channel plate 122 is connected to the side of the substrate 121 away from the tray 11, and the flow channel plate 122 cooperates with the substrate 121 to define an exhaust channel 123. When the exhaust member 20 is in the second position, the exhaust channel 123 connects the exhaust port 31 and the outside of the battery pack 100.

[0120] Specifically, the cold plate 12 is used to perform heat exchange with the battery assembly 30 to heat or cool the battery assembly 30. The cold plate 12 may be mainly composed of a substrate 121 and a flow channel plate 122.

[0121] The base plate 121 may be connected to the tray 11 and close the notch of the receiving groove 111. The exhaust member 20 may be disposed on the base plate 121, that is, the exhaust member 20 may be disposed on the cold plate 12.

[0122] A flow channel plate 122 may be provided on the side of the substrate 121 away from the tray 11, an exhaust channel 123 may be defined between the flow channel plate 122 and the substrate 121, and the exhaust member 20 may correspond to the exhaust channel 123. When thermal runaway occurs in the battery assembly 30, the exhaust member 20 is pushed open, and the high-temperature gas may enter the exhaust channel 123 through the exhaust port 31, and then flow to the outside of the battery pack 100 through the exhaust channel 123.

[0123] Therefore, the explosion-proof exhaust function is integrated on the cold plate 12, which is conducive to simplifying the structure of the battery assembly 30 and the tray 11. In addition, the exhaust channel 123 is set on the cold plate 12, and the high-temperature gas can also be cooled through the cold plate 12 during the exhaust process, reducing the harm caused by thermal runaway.

[0124] In some specific embodiments, the substrate 121 may be substantially flat, and a recessed structure may be provided on the flow channel plate 122, and the recessed structure may be recessed toward a side away from the substrate 121. The substrate 121 and the flow channel plate 122 may be brazed, and a side of the substrate 121 facing the flow channel plate 122 cooperates with the recessed structure on the flow channel plate 122 to define a flow channel 125, and the cooling medium may pass through the flow channel 125 to exchange heat with the battery assembly 30 in the housing 10. The flow channel 125 and the exhaust channel 123 may be isolated from each other.

[0125] According to some other embodiments of the present application, a groove 124 with two open ends is provided on the flow channel plate 122, and the groove 124 is recessed toward the side away from the substrate 121. The notch of the groove 124 is opposite to the exhaust piece 20, and the inner wall surface of the groove 124 and the side surface of the substrate 121 facing the flow channel plate 122 together form an exhaust channel 123.

[0126] Specifically, the flow channel plate 122 may be provided with a groove 124, both ends of the groove 124 may be open ends, the groove 124 may be recessed toward a side away from the substrate 121, and the substrate 121 closes the notch of the groove 124, so the inner wall surface of the groove 124 and the side surface of the substrate 121 facing the flow channel plate 122 may enclose the exhaust channel 123. Since both ends of the groove 124 are open ends, both ends of the exhaust channel 123 are open, and the exhaust member 20 is opposite to the notch of the groove 124, so that the high-temperature gas can enter the exhaust channel 123 and then flow out of the cold plate 12 through both ends of the exhaust channel 123.

[0127] In some specific embodiments of the present application, the number of battery assemblies 30 and the number of exhaust members 20 are both plural, and the exhaust ports 31 on the multiple battery assemblies 30 correspond one-to-one to the multiple exhaust members 20 .

[0128] Specifically, multiple battery assemblies 30 can be arranged in a preset arrangement order in the tray 11, each battery assembly 30 can be provided with an exhaust port 31, and multiple exhaust members 20 can be arranged on the housing 10 at intervals and arranged one-to-one with the multiple exhaust ports 31. In this way, each battery assembly 30 can be directly connected to the outside of the battery pack 100 through the corresponding exhaust member 20 when thermal runaway occurs, so as to avoid the high temperature gas from affecting other battery assemblies 30 and causing thermal runaway of other battery assemblies 30.

[0129] For example, Figure 7 and Figure 8 As shown, the battery assembly 30 may be in the shape of an elongated strip, and the battery assembly 30 may have a length direction, a width direction, and a thickness direction. The housing 10 may be substantially in the shape of a rectangular parallelepiped, and a plurality of battery assemblies 30 may be sequentially arranged in the accommodating space 13 along the thickness direction thereof.

[0130] The mating surface 32 on the battery assembly 30 may be a surface formed by side edges extending in the length direction and the width direction of the battery assembly 30 . The exhaust port 31 is disposed on the mating surface 32 and is opposite to the cold plate 12 .

[0131] A plurality of exhaust members 20 may be arranged on the cold plate 12 at intervals along the thickness direction of the battery assembly 30 , and the exhaust passage may extend along the thickness direction of the battery assembly 30 .

[0132] The embodiment of the present application further provides an electric device, which includes the battery pack 100 according to any of the above embodiments. Optionally, the electric device may include but is not limited to a vehicle.

[0133] Since the battery pack 100 according to the embodiment of the present invention has the above-mentioned technical effects, the electrical equipment according to the embodiment of the present application also has the corresponding technical effects, that is, it is helpful to simplify the structure of the shell 10, while realizing the explosion-proof and exhaust functions of the battery pack 100, reducing the number of parts of the battery pack 100 and reducing the cost of the battery pack 100.

[0134] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: A housing having a receiving space; A battery assembly, the battery assembly being accommodated in the accommodation space, the battery assembly having an exhaust port; An exhaust member, the exhaust member is provided on at least one of the housing and the battery assembly, and the exhaust member is movable between a first position and a second position; Wherein, when the exhaust member is in the first position, the exhaust member seals the exhaust port, When the vent member is in the second position, the vent port is in communication with the outside of the battery assembly.

2. The battery pack according to claim 1, characterized in that: The battery assembly has a mating surface, the exhaust port is arranged on the mating surface, and when the exhaust member is in the first position, the exhaust member cover is arranged at the exhaust port, and the orthographic projection of the exhaust member on the mating surface covers the exhaust port.

3. The battery pack according to claim 2, characterized in that: With the vent in the second position, at least a portion of the vent is spaced apart from the mating surface.

4. The battery pack according to any one of claims 2, characterized in that: The exhaust member comprises: A cover body, the cover body being movably disposed on the housing or the battery assembly; A sealing member, the sealing member being arranged on a side of the cover body facing the mating surface; When the exhaust member is in the first position, the cover body is close to the mating surface and presses the sealing member against the mating surface. When the vent member is in the second position, the cover body is away from the mating surface to separate the sealing member from the mating surface.

5. The battery pack according to claim 2, characterized in that: The mating surface is provided with a sealing member, and the exhaust member comprises: A cover body, the cover body being movably disposed on the housing or the battery assembly; When the exhaust member is in the first position, the cover body is close to the matching surface and presses against the sealing member. When the vent member is in the second position, the cover body is away from the mating surface and separated from the sealing member.

6. The battery pack according to claim 4 or 5, characterized in that: The cover body is a spring sheet, and in a free state, the spring sheet is inclined toward the accommodation space.

7. The battery pack according to claim 6, characterized in that: The shrapnel comprises: A sheet body, the sheet body being arranged opposite to the sealing member; An elastic connecting portion, wherein the elastic connecting portion is connected between the sheet and the shell, or the elastic connecting portion is connected between the sheet and the battery assembly, and the elastic connecting portion can be deformed to at least drive the sheet away from the mating surface.

8. The battery pack according to claim 4 or 5, characterized in that: The sealing member is annular in shape, and an orthographic projection of the sealing member on the matching surface surrounds the exhaust port.

9. The battery pack according to claim 4 or 5, characterized in that: The sealing element is a vulcanized sealing ring.

10. The battery pack according to claim 1, characterized in that: The shell is provided with an exhaust hole and an isolation portion, the exhaust hole passes through the inner wall surface and the outer surface of the shell, the isolation portion isolates the exhaust hole from the accommodating space, and when the exhaust member is in the second position, the exhaust hole is connected with the exhaust port.

11. The battery pack according to claim 10, characterized in that: The exhaust member is movably connected to the inner wall surface of the exhaust hole. When the exhaust member is in the first position, the exhaust member is accommodated in the exhaust hole.

12. The battery pack according to claim 10, characterized in that: The isolating portion is a convex portion, which is disposed on the inner wall surface of the shell and protrudes into the accommodating space, the exhaust hole passes through the convex portion, and the convex portion abuts against the outer surface of the battery assembly.

13. The battery pack according to any one of claims 1, characterized in that: The housing comprises: A tray having a receiving slot suitable for receiving the battery assembly; A cold plate, wherein the cold plate cover is disposed at the notch of the receiving slot and is surrounded by the tray to define the receiving space; Wherein, the exhaust member is arranged on at least one of the tray or the cold plate.

14. The battery pack according to claim 13, characterized in that: The cold plate comprises: A substrate, wherein the substrate cover is arranged at the notch of the receiving groove, and the exhaust member is arranged on the substrate; A flow channel plate is connected to a side of the substrate away from the tray, and the flow channel plate cooperates with the substrate to define an exhaust channel. When the exhaust member is in the second position, the exhaust channel connects the exhaust port and the outside of the battery pack.

15. The battery pack according to claim 14, characterized in that: The flow channel plate is provided with a groove with two ends open, the groove is recessed toward a side away from the substrate, the notch of the groove is opposite to the exhaust member, and the inner wall surface of the groove and a side surface of the substrate facing the flow channel plate are surrounded to form the exhaust channel.

16. The battery pack according to any one of claims 1, characterized in that: The number of the battery components and the number of the exhaust members are respectively multiple, and the exhaust ports on the multiple battery components correspond one to one to the multiple exhaust members.

17. An electrical equipment, characterized in that: include: The battery pack according to any one of claims 1 to 16.

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