Protective gas discharge assembly, battery pack and electric device

Abstract

A protective gas discharge assembly (100), a battery pack (200) and an electric device (1000). The protective gas discharge assembly (100) is used for the battery pack (200) and comprises a swelling member (1) and a protective support member (2), wherein the swelling member (1) is adapted to be opposite and abut against batteries (103); at least one accommodating cavity (11) is defined in the swelling member (1); the at least one accommodating cavity (11) is provided with the protective support member (2); and a gas discharge channel (21) is defined in the protective support member (2) and is adapted to be in communication with an explosion-proof valve of each battery (103).

Description

Protect exhaust components, battery packs, and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202323291748.5 and application date December 1, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a protective exhaust assembly, a battery pack, and an electrical device. Background Art

[0004] At present, thermal runaway problems frequently occur in electrical devices such as new energy vehicles. Thermal runaway can lead to property losses and safety issues. Therefore, how to reduce or avoid the occurrence of thermal runaway and how to avoid safety problems in battery packs are still the most important issues for batteries.

[0005] Summary of the Invention

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a protective vent assembly, which can improve the safety of a battery pack.

[0007] The present application also proposes a battery pack having the above-mentioned protective exhaust assembly.

[0008] The present application also provides an electrical device having the above-mentioned battery pack.

[0009] According to the protective exhaust assembly of the first aspect embodiment of the present application, the protective exhaust assembly is used for a battery pack and includes: an expansion member, the expansion member is suitable for being opposite to and abutting against the battery, and at least one accommodating cavity is defined in the expansion member; a protective support member, at least one of the accommodating cavities is provided with the protective support member, and an exhaust channel is defined in the protective support member, and the exhaust channel is suitable for being connected to the explosion-proof valve of the battery.

[0010] According to the protective exhaust assembly of the embodiment of the present application, by arranging a protective support member in the accommodating cavity, when the battery has thermal runaway, the protective support member can separate the high-temperature gas and the cavity wall of the accommodating cavity, so as to reduce the risk that the accommodating cavity is easily damaged by the high-temperature gas when thermal runaway occurs; at the same time, the protective support member has good structural strength relative to the expansion member, so that when the expansion member is subjected to the expansion force of the battery, the deformation of the protective support member is small or basically does not deform, and the protective support member can play a good supporting role for the expansion member, so as to improve the structural stability of the exhaust channel and the accommodating cavity, so that the exhaust channel always remains connected when the battery expands, the smoothness of the exhaust is improved, which is beneficial to improving the structural stability and carrying capacity of the protective exhaust assembly, and can prevent other batteries from contacting with the high-temperature gas and continuing to cause more batteries to have thermal runaway, slow down the speed of heat spread, and enable the battery management system to have sufficient response time so that the power line of the battery can be cut off in time, thereby improving the safety of the battery pack.

[0011] In some embodiments, the expansion member extends into a long strip shape, a width side of the expansion member is adapted to be disposed opposite to the battery, and the accommodating cavity extends along the length direction of the expansion member to pass through both ends of the length of the expansion member.

[0012] In some embodiments, in the height direction of the expansion member, the central axis of the accommodating cavity is arranged to deviate from the height center of the expansion member.

[0013] In some embodiments, there are multiple accommodating cavities, and the multiple accommodating cavities are spaced apart along the height direction and / or width direction of the expansion member.

[0014] In some embodiments, at least two of the plurality of accommodating cavities are respectively provided with the protective support member.

[0015] In some embodiments, the expansion member defines a honeycomb structure including a plurality of cavities, the shape enclosed by the peripheral walls of the cavities is a prism or a pyramid, and the central axis of the cavity extends along the width direction of the expansion member.

[0016] In some embodiments, the expansion member and the protective support member are connected by injection molding.

[0017] In some embodiments, the expansion member is a plastic member, and the protective support member is a metal member, a ceramic member, a composite material member, or a mica member.

[0018] In some embodiments, an installation cavity is further defined within the expansion member, and the installation cavity is spaced apart from the accommodating cavity. The protective exhaust assembly further includes: a connecting row, which is suitable for electrically connecting to the battery, and a portion of the connecting row is fixed to the installation cavity.

[0019] In some embodiments, the expansion member extends into a long strip shape, a width side of the expansion member is adapted to be disposed opposite to the battery, and the mounting cavity extends along the length direction of the expansion member to pass through both ends of the length of the expansion member.

[0020] In some embodiments, the width side of the expansion member is a first side, and in the width direction of the expansion member, the central axis of the mounting cavity is located at a side of the width center of the expansion member away from the first side; and / or, in the width direction of the expansion member, the connecting row is arranged adjacent to the cavity wall of the mounting cavity away from the first side.

[0021] In some embodiments, there are multiple accommodating cavities, and in the height direction of the expansion member, at least one accommodating cavity is provided on both sides of the installation cavity, and the accommodating cavities on both sides of the installation cavity are respectively located on both sides of the height center of the expansion member.

[0022] In some embodiments, the width side of the installation cavity facing the expansion member is open to form an opening, and the connecting row is adapted to be fitted into the installation cavity through the opening.

[0023] A battery pack according to an embodiment of the second aspect of the present application includes: a tray, which defines a accommodating cavity; a battery and a protective exhaust assembly, wherein the protective exhaust assembly is the protective exhaust assembly according to the embodiment of the first aspect of the present application, the protective exhaust assembly and the battery are both arranged in the accommodating cavity, and at least one length end of the protective exhaust assembly is spaced from the cavity wall of the accommodating cavity to define a connecting channel, and the connecting channel connects the exhaust channel and the explosion-proof valve of the battery.

[0024] According to the battery pack of the embodiment of the present application, the safety of the battery pack can be improved by adopting the above-mentioned protective exhaust assembly.

[0025] An electrical device according to an embodiment of the third aspect of the present application includes a battery pack according to an embodiment of the second aspect of the present application.

[0026] According to the electric device of the embodiment of the present application, the safety of the electric device can be improved by adopting the above-mentioned battery pack.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] FIG1 is a schematic diagram of a protective exhaust assembly according to some embodiments of the present application;

[0030] FIG2 is another schematic diagram of the protective exhaust assembly shown in FIG1;

[0031] FIG3 is a schematic diagram of a protective support member according to some embodiments of the present application;

[0032] FIG4 is another schematic diagram of the protective exhaust assembly shown in FIG1 ;

[0033] FIG5 is another schematic diagram of the protective exhaust assembly shown in FIG1;

[0034] FIG6 is a cross-sectional view of the protective exhaust assembly shown in FIG4;

[0035] FIG7 is a partial schematic diagram of a battery pack according to some embodiments of the present application;

[0036] FIG8 is a partial enlarged view of the battery pack shown in FIG7 ;

[0037] FIG9 is a partial schematic diagram of a battery pack according to some embodiments of the present application;

[0038] FIG10 is a schematic diagram of an electric device according to some embodiments of the present application.

[0039] Reference numerals:

[0040] Electric device 1000, battery pack 200, tray 101, storage space 101a, communication channel 102, battery 103,

[0041] Protective exhaust assembly 100,

[0042] Expansion element 1, cavity 1a, first side 1b, accommodating cavity 11, installation cavity 12, opening 12a,

[0043] Protective support 2, exhaust channel 21,

[0044] Connect row 3. DETAILED DESCRIPTION

[0045] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0046] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0047] Hereinafter, with reference to the accompanying drawings, a protective vent assembly 100 according to an embodiment of the present application will be described. The protective vent assembly 100 is used in a battery pack 200 to improve the safety of the battery pack 200.

[0048] As shown in Figures 1 and 2, the protective vent assembly 100 includes an expansion member 1 and a protective support member 2. The expansion member 1 is adapted to oppose and abut against the battery 103, so that the expansion member 1 is used to at least withstand the expansion force of the battery 103. This allows the expansion member 1 to absorb the expansion of the battery 103, reducing the compressive force on the battery 103 and providing a certain load-bearing and protective effect. Thus, the expansion member 1 can adaptively absorb the expansion force of the battery 103, thereby improving the safety of the battery 103.

[0049] It is understandable that the expansion member 1 can absorb a certain amount of impact energy. When the side of the battery pack 200 provided with the protective exhaust assembly 100 is impacted, the impact energy can be absorbed by the expansion member 1, thereby reducing the deformation of the battery 103 and protecting the battery 103.

[0050] Exemplarily, the expansion member 1 may be a non-metallic member, such as a rubber member or a plastic member.

[0051] Among them, at least one accommodating cavity 11 is defined in the expansion member 1, and the accommodating cavity 11 is suitable for connecting the inside and outside of the battery pack 200. At least one accommodating cavity 11 is provided with a protective support member 2, and an exhaust channel 21 is defined in the protective support member 2. The exhaust channel 21 is suitable for connecting with the explosion-proof valve of the battery 103. The exhaust channel 21 can be connected to the outside of the battery pack 200, so that when the battery 103 has thermal runaway, the battery 103 can discharge high-temperature exhaust substances through the explosion-proof valve, and the exhaust substances can be discharged to the outside of the battery pack 200 through the exhaust channel.

[0052] Therefore, by arranging the protective support member 2 in the accommodating chamber 11, when the battery 103 has thermal runaway, the protective support member 2 can separate the high-temperature gas from the cavity wall of the accommodating chamber 11, so that the high-temperature gas does not contact the wall surface of the accommodating chamber 11, thereby reducing the risk of the accommodating chamber 11 being easily damaged by the high-temperature gas when thermal runaway occurs, which is conducive to improving the flexibility of material selection of the expansion member 1; at the same time, the protective support member 2 has good structural strength relative to the expansion member 1, so that when the expansion member 1 is subjected to the expansion force of the battery 103, the deformation of the protective support member 2 is small or basically does not deform, and the protective support member 2 It can play a good supporting role for the expansion member 1 to improve the structural stability of the exhaust channel 21 and the accommodating cavity 11, so that the exhaust channel 21 always remains connected when the battery 103 expands, thereby improving the exhaust smoothness and exhaust stability, and reducing the risk of the exhaust channel 21 being blocked due to the expansion of the battery 103 squeezing the exhaust channel 21, which is beneficial to improving the structural stability and carrying capacity of the protective exhaust component 100, so that the high-temperature gas generated by the battery 103 when thermal runaway occurs can be discharged from the battery pack 200 through the exhaust channel 21 in a timely manner, thereby preventing other batteries from contacting the high-temperature gas and continuing to cause more batteries 103 to experience thermal runaway, slowing down the speed of heat spread, and allowing the battery management system (BMS) to have sufficient response time so that the power line of the battery 103 can be cut off in time, thereby improving the safety of the battery pack 200.

[0053] It can be seen that the provision of the protective support member 2 can reduce the risk of the expansion member 1 being crushed by the battery expansion force to a certain extent, thereby improving the reliability of the protective exhaust assembly 100.

[0054] It is understandable that the expansion member 1 defines an accommodating cavity 11 , which is provided with a protective support member 2 ; when the expansion member 1 defines multiple accommodating cavities 11 , at least one of the multiple accommodating cavities 11 is provided with a protective support member 2 .

[0055] In the embodiment of the present application, the cross-sectional shape of the accommodating cavity 11 is not limited. For example, the cross-sectional shape of the accommodating cavity 11 may be circular, elliptical, or square.

[0056] It can be understood that when there are multiple accommodating cavities 11, there is no specific restriction on the arrangement of the multiple accommodating cavities 11; no matter whether there is one or more accommodating cavities 11, for a single accommodating cavity 11, the position of the accommodating cavity 11 is not limited. For example, in the height direction of the expansion member 1 (for example, the up and down direction in Figure 1), the accommodating cavity 11 can be located at the end or middle of the expansion member 1, etc., and in the width direction of the expansion member 1 (for example, the left and right direction in Figure 1), the accommodating cavity 11 can be located at the end or middle of the expansion member 1, etc.

[0057] According to the protective vent assembly 100 of the embodiment of the present application, by disposing a protective support member 2 within the accommodating chamber 11, when thermal runaway occurs in the battery 103, the protective support member 2 can separate the high-temperature gas from the cavity wall of the accommodating chamber 11, thereby reducing the risk of the accommodating chamber 11 being easily damaged by the high-temperature gas when thermal runaway occurs. At the same time, the protective support member 2 has good structural strength relative to the expansion member 1, so that when the expansion member 1 is subjected to the expansion force of the battery 103, the protective support member 2 is slightly deformed or basically does not deform. The protective support member 2 can provide good support for the expansion member 1, thereby improving the structural stability of the vent channel 21 and the accommodating chamber 11, facilitating that the vent channel 21 always remains connected when the battery 103 expands, improving the smoothness of venting, and facilitating the improvement of the structural stability and load-bearing capacity of the protective vent assembly 100. It can prevent other batteries 103 from contacting the high-temperature gas and further causing more batteries 103 to experience thermal runaway, slow down the spread of heat, and provide the battery management system with sufficient response time to promptly cut off the power line of the battery 103, thereby improving the safety of the battery pack 200.

[0058] In some embodiments, as shown in Figures 1 and 3, the expansion member 1 extends into a long strip, and one side of the width of the expansion member 1 is suitable for being set opposite to the battery 103. Then, when the battery 103 expands, the battery 103 can squeeze the expansion member 1 along the width direction of the expansion member 1 (for example, the left and right directions in Figure 1); the accommodating cavity 11 extends along the length direction of the expansion member 1 to both ends of the length of the expansion member 1, which is conducive to simplifying the assembly of the protective support member 2 and the expansion member 1; at the same time, it is convenient for the accommodating cavity 11 to have sufficient length for setting the protective support member 2, so that the protective support member 2 can adapt to the size of the battery 103 and the position of the explosion-proof valve, so that the exhaust channel 21 is suitable for communicating with the explosion-proof valve of the battery 103, and high-temperature gas can be discharged out of the battery 103 through the exhaust channel 21 in the event of thermal runaway.

[0059] In addition, when the number of accommodating cavities 11 is greater than the number of protective support members 2, the accommodating cavities 11 are suitable for being connected to the explosion-proof valve of the battery 103 and connected to the outside of the battery pack 200. The accommodating cavities 11 without protective support members 2 can also be used as exhaust chambers to guide the exhaust substances of the battery 103 from one end of the length of the accommodating cavities 11 to the other end so as to be discharged from the battery pack 200.

[0060] In some embodiments, as shown in FIG1 , the central axis of the accommodating cavity 11 is offset from the height center of the expansion member 1 in the height direction of the expansion member 1. Thus, the position of the accommodating cavity 11 within the expansion member 1 can be offset from the middle of the battery 103 in the height direction of the expansion member 1. This allows the accommodating cavity 11 to be offset from the location where the battery 103 experiences the greatest volumetric expansion (the middle of the battery 103). This can reduce the expansion force of the battery 103 on the accommodating cavity 11, thereby reducing the expansion force of the battery 103 on the protective support member 2. Thus, when the battery 103 experiences thermal runaway, the risk of damage to the accommodating cavity 11 and the protective support member 2 due to the battery expansion force can be reduced. Even if the accommodating cavity 11 and the protective support member 2 deform under the action of the battery expansion force, the accommodating cavity 11 and the protective support member 2 can be reduced to a certain extent because the accommodating cavity 11 and the protective support member 2 are offset from the location where the battery expands the most. This allows the exhaust passage 21 to remain unobstructed, thereby discharging high-temperature gases generated by thermal runaway of the battery 103 out of the battery pack 200.

[0061] It can be understood that in the height direction of the expansion piece 1, the height of the expansion piece 1 and the battery 103 are usually the same, so that the expansion piece 1 can adapt to the height of the battery 103 to ensure reliable and complete fit. At the same time, the height center position of the expansion piece 1 corresponds to the middle of the height direction of the battery 103 (the position where the battery expansion force is the largest), and the central axis of the accommodating cavity 11 deviates from the height center setting of the expansion piece 1, that is, the accommodating cavity 11 deviates from the middle of the height direction of the battery 103.

[0062] In some embodiments, with reference to FIG. 1 , there are multiple accommodating cavities 11 , and the multiple accommodating cavities 11 are spaced apart along the height direction and / or width direction of the expansion member 1 .

[0063] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0064] Thus, the multiple accommodating cavities 11 cooperate together to improve the exhaust volume and efficiency of the protective exhaust assembly 100 to a certain extent, allowing high-temperature gases to be discharged from the battery pack 200 faster and in a shorter time, effectively reducing the intensity of thermal runaway, delaying or suppressing the occurrence of thermal runaway in other batteries 103, and thus reducing the probability of heat diffusion to a certain extent, thereby improving the safety of the battery pack 200. Specifically, at least one of the multiple accommodating cavities 11 is provided with a protective support member 2. In this case, if the number of accommodating cavities 11 provided with protective support members 2 is less than the total number of accommodating cavities 11, the high-temperature gases in the event of thermal runaway of the battery 103 can be discharged through at least one accommodating cavity 11 and at least one exhaust channel 21; if each accommodating cavity 11 is provided with a protective support member 2, the high-temperature gases in the event of thermal runaway of the battery 103 can be discharged through multiple exhaust channels 21.

[0065] It can be understood that when the number of accommodating cavities 11 provided with protective support members 2 is less than the total number of accommodating cavities 11, even if the expansion member 1 is subjected to the expansion force of the battery and causes the accommodating cavities 11 without protective support members 2 to be deformed and blocked, high-temperature gas can still be discharged through the exhaust channel 21, thereby improving the safety of the battery pack 200.

[0066] In some embodiments, as shown in FIG1 , in the height direction of the expansion member 1, a plurality of accommodating cavities 11 are respectively located on both sides of the height of the expansion member 1, so that each accommodating cavity 11 deviates from the middle position in the height direction of the expansion member 1, so that the accommodating cavity 11 deviates from the position where the expansion volume of the battery 103 is the largest (that is, the middle of the battery 103 corresponds to the middle position of the expansion member 1), so as to reduce the expansion force applied to the accommodating cavity 11 when the battery 103 expands, thereby reducing the risk of the accommodating cavity 11 being squeezed and damaged by the expansion force of the battery 103 when the battery 103 thermally runs away, which is conducive to improving the battery 103. The stability of the high containment cavity 11 allows high-temperature gas to be stably discharged out of the battery 103 through the containment cavity 11; in the width direction of the expansion member 1, multiple containment cavities 11 are located on the side of the expansion member 1 away from the battery 103, so that the width center of the containment cavity 11 is away from the battery 103, which can reduce the expansion force of the battery 103 on the containment cavity 11 when it expands, thereby reducing the risk of the containment cavity 11 being squeezed and damaged by the expansion force of the battery 103 during thermal runaway, which is beneficial to improving the stability of the containment cavity 11, so that high-temperature gas can be stably discharged out of the battery pack 200 through the containment cavity 11.

[0067] In some embodiments, in combination with Figure 1, at least two of the multiple accommodating cavities 11 are respectively provided with protective support members 2, thereby allowing the accommodating cavity 11 provided with the protective support member 2 to discharge high-temperature gas through the exhaust channel 21. When the battery 103 thermally runs away, the battery pack 200 can discharge the high-temperature gas through at least two exhaust channels 21 to reduce the intensity of the thermal runaway, which is beneficial to delaying or suppressing the continued occurrence of thermal runaway of other batteries 103 and improving the safety of the battery pack 200.

[0068] In some embodiments, as shown in FIG1 , the expansion member 1 defines a honeycomb structure including a plurality of cavities 1a. The peripheral walls of each cavity 1a form a prism or pyramid shape, and the central axis of each cavity 1a extends along the width of the expansion member 1. This improves the structural strength of the expansion member 1, allowing the expansion member 1 to withstand greater expansion forces, thereby reducing the risk of damage to the accommodating cavity 11 caused by the expansion forces of the battery 103. Furthermore, the expansion member 1 can withstand greater impact energy, thereby reducing damage to the battery 103 caused by such impacts, thereby improving the safety of the battery 103.

[0069] For example, for a single cavity 1a, the shape formed by the peripheral walls of the cavity 1a is a prism or a pyramid. It is understood that the shapes formed by the peripheral walls of multiple cavities 1a can be the same or different. For example, the shape formed by the peripheral walls of all cavities 1a is a hexagonal prism; for another example, the shape formed by the peripheral walls of at least one of the multiple cavities 1a is a hexagonal prism, and the shape formed by the peripheral walls of at least one of the remaining cavities 1a is a quadrangular prism.

[0070] Of course, the structure of the expansion member 1 is not limited thereto; for example, the expansion member 1 may also be constructed such that a plurality of deformation cavities spaced apart are defined within the expansion member 1 , and each deformation cavity extends along the length direction of the expansion member 1 .

[0071] Exemplarily, the accommodating cavity 1 is connected to at least two of the multiple cavities 1a so that a portion of the protective support 2 is exposed to the corresponding cavity 1a, which is beneficial for saving the material used in the protective exhaust component 100 while ensuring that the protective exhaust component 100 has appropriate structural strength.

[0072] In some embodiments, as shown in Figure 1, the expansion member 1 and the protective support member 2 are injection-molded together, which can improve the connection strength between the protective support member 2 and the expansion member 1, so that the protective support member 2 and the expansion member 1 are better connected into an integrated structure, thereby improving the stability and structural strength of the protective exhaust assembly 100.

[0073] Among them, the expansion part 1 and the protective support part 2 are injection-molded together, which can be understood as wrapping the entire protective support part 2 through an injection mold, and then forming the expansion part 1 through an injection molding process, so that the expansion part 1 is formed into an injection-molded part, and the protective support part 2 is pre-embedded in the expansion part 1 as an insert.

[0074] In some embodiments, with reference to FIG. 1 , the protective support member 2 has better anti-deformation performance than the expansion member 1 ; and / or, the protective support member 2 has better high-temperature resistance than the expansion member 1 .

[0075] In some examples, combined with Figure 1, the protective support member 2 has better anti-deformation performance than the expansion member 1, so the protective support member 2 is set in the accommodating cavity 11, which can improve the structural strength of the accommodating cavity 11, so that the exhaust channel 21 can withstand a greater battery expansion force and improve the structural stability of the exhaust channel 21, so that the exhaust channel 21 can remain connected to discharge high-temperature gas when the battery 103 thermally runs away, thereby improving the safety of the battery pack 200.

[0076] In some examples, combined with Figure 1, the high temperature resistance of the protective support member 2 is better than that of the expansion member 1. Then, a protective support member 2 is arranged in the accommodating cavity 11, which can improve the high temperature resistance of the accommodating cavity 11, so that the exhaust channel 21 can withstand high temperature gas and prevent the high temperature gas from damaging the accommodating cavity 11 (such as melting, etc.), thereby improving the performance of the protective scheduling component, improving the stability of the exhaust channel 21 and the stability of the exhaust efficiency, and helping to slow down the speed of thermal runaway of the battery 103, so that the battery management system has a suitable response time to cut off the battery power supply, thereby improving the safety of the battery pack 200.

[0077] In some embodiments, the expansion member 1 is a plastic member so that the expansion member 1 can better absorb the expansion force of the battery 103 to adapt to the expansion of the battery 103, reduce the extrusion force on the battery 103, and protect the battery 103; the protective support member 2 is a metal member, a ceramic member, a composite material member or a mica member, so that the protective support member 2 has suitable structural strength and high temperature resistance. In addition, the protective support member 2 has a variety of options and can adapt to the requirements of the battery 103 structure and the protective exhaust assembly 100 to select suitable materials to improve the safety of the battery pack 200.

[0078] In some embodiments, as shown in Figures 1 and 7, an installation cavity 12 is further defined in the expansion member 1, and the installation cavity 12 is spaced apart from the accommodating cavity 11. The protective exhaust assembly 100 also includes a connecting row 3, which is suitable for electrically connecting to the battery 103. A portion of the connecting row 3 is fixed in the installation cavity 12, so that a portion of the connecting row 3 is arranged in the installation cavity 12, which facilitates the setting and installation of the connecting row 3 and helps to save the space occupied by the protective exhaust assembly 100; at the same time, separating the installation cavity 12 and the accommodating cavity 11 can effectively prevent high-temperature gas from affecting the connecting row 3, thereby improving the safety of the connecting row 3.

[0079] Exemplarily, the installation cavity 12 is spaced apart from the accommodating cavity 11. When the spacing between the accommodating cavity 11 and the installation cavity 12 is less than a preset spacing, the electrical clearance between the protective support member 2 and the connecting row 3 is insufficient. The protective support member 2 may be a non-metallic member, such as a ceramic member, a non-metallic composite member, or a mica member. When the spacing between the accommodating cavity 11 and the installation cavity 12 is greater than or equal to the preset spacing, there is sufficient electrical clearance and creepage distance between the protective support member 2 and the connecting row 3. The protective support member 2 may be a metal member or a non-metallic member. Of course, in other examples, the connecting row 3 may also be insulated to avoid the risk of electrical breakdown or short circuit between the protective support member 2 and the connecting row 3 when the protective support member 2 is a metal member, which is beneficial to improving the safety of the battery pack 200.

[0080] In the embodiment of the present application, the material of the connecting bar 3 is not limited, for example, it can be copper or aluminum, etc.; the fixing method between the connecting bar 3 and the expansion member 1 is also not limited, for example, the connecting piece 3 and the expansion member 1 are fixed by snapping.

[0081] 7-9 , the expansion member 1 can form multiple mounting cavities 12, with at least one of the multiple mounting cavities 12 being provided with a connection bar 3, facilitating the arrangement of the connection bar 3 to accommodate the electrical connection requirements of the battery 103. For example, in the example of FIG9 , there are two mounting cavities 12, each corresponding to a connection bar 3.

[0082] In some technologies, an installation cavity is formed in the expansion member, and a connecting row is provided in the installation cavity. The gap between the connecting row and the installation cavity is usually used as an exhaust channel. However, the exhaust channel is easily damaged by the expansion force of the battery 103 or high-temperature gas, etc., which may cause the high-temperature gas to fail to be discharged in time, affecting the safety of the battery 103. In the embodiment of the present application, the expansion member 1 has an installation cavity 12 and a accommodating cavity 11. The installation cavity 12 is used to set the connecting row 3, and the accommodating cavity 11 is provided with a protective support member 2 to avoid interference between the installation cavity 12 and the accommodating cavity 11; an exhaust channel 21 is defined in the protective support member 2, and the exhaust channel 21 is suitable for being connected to the explosion-proof valve of the battery 103, so that when the battery 103 has thermal runaway, the high-temperature gas can be discharged from the battery 103 in time through the exhaust channel 21, and the protective support member 2 has good structural strength, which can play a good supporting role for the expansion member 1, so as to improve the structural stability of the exhaust channel 21 and the accommodating cavity 11, so that the exhaust channel 21 always remains connected when the battery 103 expands, thereby improving the smoothness of exhaust, and the protective support member 2 has good high temperature resistance, so that the exhaust channel 21 can withstand high-temperature gas well, thereby improving the stable flow of the exhaust channel 21.

[0083] In some embodiments, as shown in Figure 1, the expansion member 1 extends into a long strip, and one side of the width of the expansion member 1 is suitable for being arranged opposite to the battery 103. The above-mentioned width side of the expansion member 1 is suitable for directly or indirectly stopping the battery 103, and when the battery 103 expands, a force is applied to the expansion member 1 along the width direction of the expansion member 1; and the installation cavity 12 extends along the length direction of the expansion member 1 to both ends of the length of the expansion member 1, so that the installation cavity 12 has a suitable length, which is convenient for setting the connecting row 3, so that the connecting row 3 is suitable for connecting the battery 103 and corresponding components (such as electrical equipment, etc.). At the same time, the extension direction of the connecting row 3 is basically perpendicular to the direction of the force applied by the battery 103 to the expansion member 1, which is beneficial to reduce the influence of the expansion member 1 on the connecting row 3 when the battery expansion force is applied.

[0084] In some embodiments, as shown in FIG1 , one side of the width of the expansion member 1 is the first side 1 b , and the other side of the width of the expansion member 1 may be the second side. When the battery 103 expands, the battery 103 may apply an extrusion force on the expansion member 1 along the first side 1 b toward the second side.

[0085] Among them, in the width direction of the expansion member 1, the central axis of the installation cavity 12 is located on the side of the width center of the expansion member 1 away from the first side 1b, so as to appropriately increase the distance between the installation cavity 12 and the battery 103, which can reduce the expansion force acting on the installation cavity 12 when the battery 103 expands, which is beneficial to reducing the deformation of the installation cavity 12 and reducing the damage to the connecting row 3 caused by the expansion force of the battery 103, thereby improving the safety of the connecting row 3; and / or, in the width direction of the expansion member 1, the connecting row 3 is arranged adjacent to the cavity wall of the installation cavity 12 away from the first side 1b, so as to appropriately increase the distance between the connecting row 3 and the battery 103, which can reduce the expansion force acting on the connecting row 3 when the battery 103 expands, which is beneficial to reducing the damage to the connecting row 3 caused by the expansion force of the battery 103, thereby improving the safety of the connecting row 3.

[0086] It can be understood that, in the width direction of the expansion member 1, the position of the installation cavity 12 in the expansion member 1 is not limited to this. For example, the central axis of the installation cavity 12 is set in the direction close to the first side 1b, deviating from the width center of the expansion member 1, or the central axis of the installation cavity 12 coincides with the width center of the expansion member 1, etc.; in the width direction of the expansion member 1, the position of the connecting row 3 in the installation cavity 12 is not limited to this. For example, the connecting row 3 is set adjacent to the cavity wall of the installation cavity 12 close to the first side 1b, or the connecting row 3 is located at the center of the installation cavity 12, etc.

[0087] In some embodiments, as shown in Figure 1, there are multiple accommodating cavities 11, and in the height direction of the expansion member 1, at least one accommodating cavity 11 is provided on both sides of the installation cavity 12, and the accommodating cavities 11 on both sides of the installation cavity 12 are respectively located on both sides of the height center of the expansion member 1, which is conducive to the reasonable setting of the installation cavity 12 and the accommodating cavity 11. On the premise that the accommodating cavity 11 and the installation cavity 12 do not interfere with each other, the central axis of the accommodating cavity 11 can be deviated from the height center of the expansion member 1 in the height direction of the expansion member 1, thereby reducing the battery expansion force on the accommodating cavity 11 and the corresponding protective support member 2, which is conducive to improving the structural stability of the accommodating cavity 11 and the corresponding protective support member 2.

[0088] In some embodiments, as shown in FIG1 , the width side (i.e., the first side 1b) of the installation cavity 12 facing the expansion member 1 is open to form an opening 12a, and the connecting row 3 is adapted to be fitted into the installation cavity 12 through the opening 12a, so that the connecting row 3 can be arranged in the installation cavity 12 through the opening 12a for easy installation.

[0089] For example, in combination with Figures 1 and 6, in the width direction of the expansion member 1, the first side 1b is located on the right side of the expansion member 1, the battery 103 is adapted to cooperate with the first side 1b, the central axis of the installation cavity 12 is set in a direction away from the first side 1b and deviates from the width center of the expansion member 1, and the side of the installation cavity 12 facing the expansion member 1 away from the first side 1b is open to form an opening 12a, and the connecting row 3 is suitable for being arranged in the installation cavity 12 through the opening 12a; in the height direction of the expansion member 1, the two accommodating cavities 11 are respectively located on both sides of the installation cavity 12, and a protective support member 2 is provided in each accommodating cavity 11, and the protective support member 2 forms an exhaust channel 21, and the exhaust channel 21 is suitable for being connected to the explosion-proof valve of the battery 103; when the battery 103 suffers thermal runaway, the two exhaust channels 21 can discharge high-temperature gas out of the battery pack 200.

[0090] The battery pack 200 according to the second aspect embodiment of the present application includes a tray 101, a battery 103 and a protective exhaust assembly 100. The tray 101 defines a accommodating space 101a. The protective exhaust assembly 100 is the protective exhaust assembly 100 according to the above-mentioned first aspect embodiment of the present application. The protective exhaust assembly 100 and the battery 103 are both arranged in the accommodating space 101a, and at least one length end of the protective exhaust assembly 100 is spaced from the cavity wall of the accommodating space 101a to define a connecting channel 102. The connecting channel 102 connects the exhaust channel 21 and the explosion-proof valve of the battery 103. When the battery 103 has thermal runaway, the high-temperature gas flows through the explosion-proof valve to the connecting channel 102 and to the exhaust channel 21, and then the high-temperature gas is discharged from the exhaust channel 21 out of the battery pack 200.

[0091] According to the battery pack 200 of the embodiment of the present application, the safety of the battery pack 200 can be improved by adopting the above-mentioned protective exhaust assembly 100.

[0092] For example, in combination with Figures 7 to 9, take the width direction of the tray 101 as the width direction of the expansion member 1 (for example, the left-right direction in Figure 7), and the length direction of the tray 101 as the length direction of the expansion member 1 (for example, the front-back direction in Figure 7) as an example: the battery pack 200 includes a tray 101, a plurality of batteries 103 and a protective exhaust assembly 100, the tray 101 defines at least one accommodating space 101a, each accommodating space 101a is respectively provided with a protective exhaust assembly 100 and a plurality of batteries 103, and the protective exhaust assembly 100 is arranged at the corresponding accommodating space 101a in the width direction of the tray 101 On the upward side, multiple batteries 103 can be connected in series, in parallel, or in a mixed manner, and multiple batteries 103 are arranged sequentially along the width direction of the expansion member 1, with each battery 103 extending along the length direction of the expansion member 1. The width side of the protective exhaust assembly 1 is adapted to be positioned opposite the battery 103. Along the length direction of the tray 101, one end of the protective exhaust assembly 100 is spaced from the corresponding cavity wall of the storage space 101a to define a connecting channel 102. An explosion-proof valve is provided at one end of the battery 103, and the exhaust channel 21 communicates with the explosion-proof valves of the multiple batteries 103 through the connecting channel 102. When there are multiple storage spaces 101a, the multiple storage spaces 101a can be arranged sequentially along the length direction of the tray 101. The left-right, front-back, and other directions in Figure 7 are merely for the purpose of simplifying the description and do not indicate or imply that the tray 101 must have a specific orientation, be constructed, or be operated in a specific orientation.

[0093] The electrical device according to the third embodiment of the present application includes the battery pack 200 according to the second embodiment of the present application.

[0094] According to the electric device of the embodiment of the present application, the safety of the electric device can be improved by adopting the above-mentioned battery pack 200.

[0095] For example, the power-consuming device may be, but is not limited to, a vehicle or an energy storage device; as shown in FIG10 , the vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. The vehicle is provided with a battery pack 200, which may be provided at the bottom, head, or tail of the vehicle. The battery pack 200 may be used to power the vehicle, for example, the battery pack 200 may serve as an operating power source for the vehicle. In some embodiments of the present application, the battery pack 200 may serve not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0096] In the description of this application, it should be understood that the terms "center", "length", "width", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0097] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0098] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0099] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A protective exhaust assembly (100), wherein: The protective exhaust assembly (100) is used for a battery pack (200) and comprises: An expansion member (1), the expansion member (1) being adapted to be opposite to and abutting against the battery (103), and at least one accommodating cavity (11) being defined in the expansion member (1); A protective support member (2), wherein at least one of the accommodating chambers (11) is provided with the protective support member (2), and an exhaust channel (21) is defined in the protective support member (2), and the exhaust channel (21) is suitable for communicating with an explosion-proof valve of the battery (103).

2. The protective exhaust assembly (100) according to claim 1, wherein: The expansion piece (1) extends into a long strip shape, the width side of the expansion piece (1) is suitable for being arranged opposite to the battery (103), and the accommodating cavity (11) extends along the length direction of the expansion piece (1) to pass through both ends of the length of the expansion piece (1).

3. The protective exhaust assembly (100) according to claim 2, wherein: In the height direction of the expansion member (1), the central axis of the accommodating cavity (11) is arranged to deviate from the height center of the expansion member (1).

4. The protective exhaust assembly (100) according to claim 2 or 3, wherein: There are a plurality of accommodating cavities (11), and the plurality of accommodating cavities (11) are arranged at intervals along the height direction and / or the width direction of the expansion member (1).

5. The protective exhaust assembly (100) according to claim 4, wherein: At least two of the plurality of accommodating cavities (11) are respectively provided with the protective support member (2).

6. The protective exhaust assembly (100) according to any one of claims 2 to 5, wherein: The expansion piece (1) defines a honeycomb structure, which includes a plurality of cavities (1a). The shape enclosed by the peripheral walls of the cavities (1a) is a prism or a pyramid, and the central axis of the cavity (1a) extends along the width direction of the expansion piece (1).

7. The protective exhaust assembly (100) according to any one of claims 1 to 6, wherein: The expansion member (1) and the protective support member (2) are connected by injection molding.

8. The protective exhaust assembly (100) according to any one of claims 1 to 7, wherein: The expansion piece (1) is a plastic piece, and the protective support piece (2) is a metal piece, a ceramic piece, a composite material piece or a mica piece.

9. The protective exhaust assembly (100) according to any one of claims 1 to 8, wherein: The expansion member (1) further defines a mounting cavity (12), the mounting cavity (12) being spaced apart from the accommodating cavity (11), and the protective exhaust assembly (100) further comprising: A connection bar (3), the connection bar (3) being suitable for being electrically connected to the battery (103), and a portion of the connection bar (3) being fixedly arranged in the installation cavity (12).

10. The protective exhaust assembly (100) according to claim 9, wherein: The expansion piece (1) extends into a long strip shape, and a width side of the expansion piece (1) is suitable for being arranged opposite to the battery (103), and the installation cavity (12) extends along the length direction of the expansion piece (1) to pass through both ends of the length of the expansion piece (1).

11. The protective exhaust assembly (100) according to claim 10, wherein: The width side of the expansion member (1) is a first side (1b), In the width direction of the expansion member (1), the central axis of the installation cavity (12) is located on a side of the width center of the expansion member (1) away from the first side (1b); and / or, In the width direction of the expansion member (1), the connection row (3) is arranged adjacent to a cavity wall of the installation cavity (12) away from the first side (1b).

12. The protective exhaust assembly (100) according to claim 10 or 11, wherein: There are a plurality of accommodating cavities (11), and in the height direction of the expansion member (1), at least one accommodating cavity (11) is respectively provided on both sides of the installation cavity (12), and the accommodating cavities (11) on both sides of the installation cavity (12) are respectively located on both sides of the height center of the expansion member (1).

13. The protective exhaust assembly (100) according to any one of claims 10-12, wherein: The width side of the installation cavity (12) facing the expansion member (1) is open to form an opening (12a), and the connection row (3) is suitable for fitting into the installation cavity (12) through the opening (12a).

14. A battery pack (200), wherein: include: A tray (101), wherein the tray (101) defines a receiving space (101a); A battery (103) and a protective exhaust component (100), wherein the protective exhaust component (100) is the protective exhaust component (100) according to any one of claims 1 to 13, wherein the protective exhaust component (100) and the battery (103) are both arranged in the accommodating space (101a), and at least one length end of the protective exhaust component (100) is spaced from the cavity wall of the accommodating space (101a) to define a connecting channel (102), and the connecting channel (102) connects the exhaust channel (21) and the explosion-proof valve of the battery (103).

15. An electrical device (1000), wherein: Comprising the battery pack (200) according to claim 14.

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