Pressure relief assembly and battery pack

Abstract

The utility model provides a pressure relief assembly and a battery pack. The pressure relief assembly comprises a first pressure relief piece and a second pressure relief piece, the first pressure relief piece is provided with a supporting surface, the supporting surface is used for supporting the battery module, a first pressure relief channel is formed in the first pressure relief piece, the second pressure relief piece is detachably connected with the first pressure relief piece, the second pressure relief piece protrudes out of the supporting surface, and a containing space is formed by the second pressure relief piece and the first pressure relief piece; the accommodating space is used for mounting a battery module, a second pressure relief channel is arranged in the second pressure relief piece and is communicated with the first pressure relief channel, a pressure relief hole is formed in one side, facing the accommodating space, of one of the first pressure relief piece and the second pressure relief piece, and the pressure relief hole is used for being communicated with an anti-explosion valve of a battery cell in the battery module; and the pressure relief hole is communicated with the first pressure relief channel and the second pressure relief channel. The pressure relief assembly is formed by the first pressure relief part and the second pressure relief part which are detachably connected, so that the mounting mode of the pressure relief assembly is simpler and more convenient, and maintenance or replacement of the pressure relief assembly is facilitated.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a pressure relief assembly and a battery pack. Background Art

[0002] With the rapid development of battery technology, the safety design of battery packs has received widespread attention. The battery pack is composed of multiple battery modules. When the battery cells in the battery module experience thermal runaway, a large amount of high-temperature gas will be instantly released from the battery cells accompanied by flames. In related technologies, a pressure relief channel is set in the battery pack to prevent the gas and flame from randomly spreading around the battery pack, and even causing safety accidents such as fire or explosion. However, in related technologies, an integrated pressure relief channel is often formed in the box of the battery pack, and the box is mostly assembled by welding, and the welding difficulty is relatively large, which makes it difficult to assemble the pressure relief components that form the pressure relief channel and inconvenient to repair and replace. Utility Model Content

[0003] The embodiments of the present application provide a pressure relief assembly and a battery pack, which can improve the technical problems in the related art that the pressure relief assembly is difficult to assemble and inconvenient to repair and replace.

[0004] In a first aspect, an embodiment of the present application provides a pressure relief assembly, comprising:

[0005] A first pressure relief member having a support surface, the support surface is used to support the battery module, and a first pressure relief channel is provided in the first pressure relief member;

[0006] a second pressure relief member, detachably connected to the first pressure relief member, the second pressure relief member protruding from the support surface and forming a receiving space with the first pressure relief member, the receiving space being used to install the battery module, the second pressure relief member being provided with a second pressure relief channel, the second pressure relief channel being communicated with the first pressure relief channel;

[0007] Among them, a pressure relief hole is opened on one side of the first pressure relief member and the second pressure relief member facing the accommodating space, and the pressure relief hole is used to connect to the explosion-proof valve of the battery cell in the battery module, and the pressure relief hole is connected to the first pressure relief channel and the second pressure relief channel.

[0008] In one embodiment, the pressure relief assembly includes a plurality of second pressure relief parts, the plurality of second pressure relief parts are arranged at intervals along the first direction, the plurality of second pressure relief parts are respectively connected to the first pressure relief parts, and any two adjacent second pressure relief parts and the first pressure relief parts are enclosed to form the accommodating space.

[0009] In one embodiment, one first pressure relief channel is provided in the first pressure relief member, and a plurality of second pressure relief channels in the second pressure relief members are respectively connected to the first pressure relief channel; or,

[0010] A plurality of first pressure relief channels are provided in the first pressure relief member, and the plurality of first pressure relief channels are arranged at intervals along the first direction. The plurality of first pressure relief channels correspond one-to-one to the plurality of accommodating spaces, and the second pressure relief channel in the second pressure relief member is connected to the first pressure relief channel corresponding to at least one adjacent accommodating space.

[0011] In one embodiment, the pressure relief assembly includes a plurality of the first pressure relief parts, the first pressure relief part is connected between any two adjacent second pressure relief parts, any two adjacent second pressure relief parts and the corresponding first pressure relief parts are enclosed to form the accommodating space, and the second pressure relief channel in the second pressure relief part is connected to the first pressure relief channel in at least one adjacent first pressure relief part.

[0012] In one embodiment, the first pressure relief channels in the plurality of first pressure relief members are interconnected.

[0013] In one embodiment, two second pressure relief channels are provided in the second pressure relief member located between two adjacent accommodating spaces, and the two second pressure relief channels are arranged in parallel along the first direction; in the first direction, the pressure relief holes are respectively opened on opposite sides of the second pressure relief member, and the pressure relief holes are respectively connected to the corresponding second pressure relief channels.

[0014] In one embodiment, the two second pressure relief channels in the second pressure relief member are connected to each other; or,

[0015] The two second pressure relief channels in the second pressure relief member are isolated from each other, and the two second pressure relief channels in the second pressure relief member are respectively communicated with the first pressure relief channels in the first pressure relief member corresponding to the adjacent accommodating space.

[0016] In one embodiment, a mounting groove is provided on one of a side of the first pressure relief member facing the second pressure relief member and a side of the second pressure relief member facing the first pressure relief member, and a mounting portion is protruded from a position corresponding to the mounting groove on the other side, and the mounting portion is used to be inserted into the mounting groove to connect the first pressure relief channel with the second pressure relief channel.

[0017] In one embodiment, the pressure relief assembly further includes a fixing member, which includes two clamping parts and a connecting part connected between the two clamping parts, and the two clamping parts are respectively clamped with one side of two adjacent second pressure relief members to connect the two adjacent second pressure relief members.

[0018] In a second aspect, an embodiment of the present application provides a battery pack, the battery pack comprising:

[0019] The pressure relief assembly described in any one of the above items;

[0020] The battery module is arranged in the accommodating space of the pressure relief component, and the explosion-proof valve of the battery cell in the battery module is communicated with the pressure relief hole in the pressure relief component.

[0021] Beneficial effects of the embodiments of the present application:

[0022] In an embodiment of the present application, a accommodating space for installing a battery module is formed by a first pressure relief member and a second pressure relief member, and a pressure relief channel is provided in the first pressure relief member and the second pressure relief member, so that the high-temperature gas generated by thermal runaway of the battery module can be discharged in a direction along the pressure relief channel; by adopting a detachable connection method, when the first pressure relief member or the second pressure relief member has a blockage or other fault, it is also convenient to disassemble, repair or replace it. Compared with integrated methods such as welding, the installation method of the pressure relief assembly in the present application is simpler and more convenient; in addition, the first pressure relief member in the present application can also serve as a supporting structure of the battery module to support the battery module to ensure the installation stability of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of a three-dimensional structure of a pressure relief assembly provided in an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a three-dimensional structure of a first pressure relief member provided in an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of a three-dimensional structure of a second pressure relief member provided in an embodiment of the present application;

[0027] Figure 4 is a schematic cross-sectional structural diagram of a second pressure relief member provided in an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of a three-dimensional structure of a fixing member provided in an embodiment of the present application;

[0029] Figure 6 It is a schematic diagram of the assembly structure of a battery pack provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 10. Battery pack;

[0032] 100, pressure relief assembly; 110, first pressure relief member; 111, support surface; 112, first pressure relief channel; 113, mounting portion; 114, second reinforcing rib; 120, second pressure relief member; 121, second pressure relief channel; 122, pressure relief hole; 123, mounting groove; 124, first reinforcing rib; 130, accommodating space; 140, fixing member; 141, clamping portion; 142, connecting portion; X, first direction; Y, second direction;

[0033] 200, battery module DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0035] The embodiments of the present application provide a pressure relief assembly and a battery pack, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0036] First, the embodiment of the present application provides a pressure relief component, such as Figure 1 As shown, the pressure relief assembly 100 includes a first pressure relief member 110 and a second pressure relief member 120, the first pressure relief member 110 and the second pressure relief member 120 are detachably connected, the first pressure relief member 110 has a support surface 111, the support surface 111 is used to support the battery module 200, the second pressure relief member 120 protrudes from the support surface 111, and forms a receiving space 130 with the first pressure relief member 110, and the receiving space 130 is used to install the battery module 200. That is, the first pressure relief member 110 and the second pressure relief member 120 are assembled in a detachable manner to form the receiving space 130 for installing the battery module 200, and the first pressure relief member 110 can serve as a supporting structure to support the battery module 200.

[0037] Among them, Figures 2 to 4As shown, a first pressure relief passage 112 is provided in the first pressure relief member 110, a second pressure relief passage 121 is provided in the second pressure relief member 120, the second pressure relief passage 121 is communicated with the first pressure relief passage 112, and a pressure relief hole 122 is provided on one side of the first pressure relief member 110 and the second pressure relief member 120 facing the accommodation space 130, the pressure relief hole 122 is used to communicate with the explosion-proof valve of the battery cell in the battery module 200, and the pressure relief hole 122 is communicated with the first pressure relief passage 112 and the second pressure relief passage 121. That is, when the battery module 200 has thermal runaway, the generated high-temperature gas can enter the first pressure relief passage 112 and the second pressure relief passage 121 from the pressure relief hole 122 through the explosion-proof valve of the battery cell and be discharged in time, so as to avoid safety accidents such as explosion due to thermal runaway of the battery module 200.

[0038] It should be noted that when the pressure relief hole 122 is provided on the second pressure relief part 120, a pressure relief valve (not shown in the figure) is provided on the first pressure relief part 110; when the pressure relief hole 122 is provided on the first pressure relief part 110, a pressure relief valve is provided on the second pressure relief part 120. The pressure relief valve serves as the final discharge port of the gas in the pressure relief assembly 100 and is used to discharge the high-temperature gas generated when the battery module 200 thermally runs away from the pressure relief assembly 100.

[0039] Among them, the pressure relief holes 122 extend along the second direction Y, and each pressure relief hole 122 can simultaneously connect to the explosion-proof valves of multiple battery cells in the battery module 200, that is, the pressure relief holes 122 can be distributed in multiple rows and columns, and their distribution method is consistent with the distribution method of multiple battery cells in the battery module 200.

[0040] Correspondingly, when the pressure relief holes 122 are provided on the second pressure relief member 120, a plurality of first reinforcing ribs 124 extending along the second direction Y can also be provided in the second pressure relief channel 121 in the second pressure relief member 120, and each first reinforcing rib 124 is respectively located between two adjacent rows of pressure relief holes 122, so as to divide the second pressure relief channel 121 into a plurality of sub-channels, thereby forming a directional pressure relief channel corresponding to each row of cells in the battery module 200, and at the same time, the provision of the first reinforcing rib 124 can also increase the structural strength of the second pressure relief member 120, and ensure the structural stability of the pressure relief assembly 100. Among them, the plurality of sub-channels are interconnected on one side along the second direction Y, so as to realize the connection between the plurality of sub-channels and the first pressure relief channel 112 in the first pressure relief member 110.

[0041] In the embodiment of the present application, a accommodating space 130 for installing a battery module 200 is formed by a first pressure relief member 110 and a second pressure relief member 120, and a pressure relief channel is provided in the first pressure relief member 110 and the second pressure relief member 120, so that the high-temperature gas generated by thermal runaway of the battery module 200 can be discharged in a direction along the pressure relief channel; by adopting a detachable connection method, when the first pressure relief member 110 or the second pressure relief member 120 has a blockage or other fault, it is also convenient to disassemble, repair or replace. Compared with an integrated method such as welding, the installation method of the pressure relief assembly 100 in the present embodiment is simpler and more convenient; in addition, the first pressure relief member 110 in the present embodiment can also serve as a supporting structure of the battery module 200 to support the battery module 200, so as to ensure the installation stability of the battery module 200.

[0042] Optional, such as Figure 1 As shown, the pressure relief assembly 100 includes a plurality of second pressure relief members 120, which are arranged at intervals along the first direction X, and the plurality of second pressure relief members 120 are respectively connected to the first pressure relief member 110, and any two adjacent second pressure relief members 120 and the first pressure relief member 110 are enclosed to form a receiving space 130. That is, the pressure relief assembly 100 is formed with a plurality of receiving spaces 130, and each receiving space 130 can be used to install one or two battery modules 200, and the explosion-proof valve of the battery cell in each battery module 200 is communicated with the pressure relief hole 122 on the adjacent second pressure relief member 120, and is communicated with the second pressure relief channel 121 in the corresponding second pressure relief member 120, and the second pressure relief channel 121 in the second pressure relief member 120 is respectively communicated with the first pressure relief channel 112 in the first pressure relief member 110.

[0043] In some embodiments, a first pressure relief member 110 is provided with a first pressure relief channel 112, and a plurality of second pressure relief channels 121 in the second pressure relief members 120 are respectively communicated with the first pressure relief channel 112. That is, the pressure relief assembly 100 includes a first pressure relief member 110 and a plurality of second pressure relief members 120, and the plurality of second pressure relief members 120 are simultaneously connected to the first pressure relief member 110, a first pressure relief channel 112 is provided in the first pressure relief member 110, and the second pressure relief channels 121 in the plurality of second pressure relief members 120 are simultaneously communicated with the first pressure relief channel 112, so as to form directional pressure relief channels respectively.

[0044] In other embodiments, a plurality of first pressure relief channels 112 are provided in the first pressure relief member 110, and the plurality of first pressure relief channels 112 are arranged at intervals along the first direction X, and the plurality of first pressure relief channels 112 correspond to the plurality of accommodation spaces 130 one by one, and the second pressure relief channel 121 in the second pressure relief member 120 is connected to the first pressure relief channel 112 corresponding to at least one adjacent accommodation space 130. That is, although the pressure relief assembly 100 includes only one first pressure relief member 110, the first pressure relief member 110 is provided with a plurality of first pressure relief channels 112 arranged at intervals, and each first pressure relief channel 112 is located at the bottom of one of the accommodation spaces 130, respectively. When the battery module 200 has thermal runaway, the generated high-temperature gas flows through the second pressure relief channel 121 in the corresponding second pressure relief member 120 to the first pressure relief channel 112 corresponding to the adjacent accommodation space 130 and is discharged, so as to reduce the impact on the battery modules 200 installed in other accommodation spaces 130.

[0045] It should be noted that when the pressure relief assembly 100 includes a first pressure relief member 110 and a plurality of second pressure relief members 120, the plurality of second pressure relief members 120 can be directly plugged into the support surface 111 of the first pressure relief member 110 in sequence along the first direction X; when there is only one first pressure relief channel 112 in the first pressure relief member 110, a corresponding pressure relief valve can be set on the first pressure relief member 110 as the final outlet; and when a plurality of first pressure relief channels 112 are arranged at intervals along the first direction X in the first pressure relief member 110, a pressure relief valve can be set on the first pressure relief member 110 at the position corresponding to each first pressure relief channel 112 as the final outlet of each pressure relief channel. The specific setting method can be selected and adjusted according to the actual design requirements, and it is only necessary to ensure that the high-temperature gas generated when the battery module 200 has thermal runaway can be discharged smoothly.

[0046] Among them, a plurality of second reinforcing ribs 114 extending along the first direction X can be arranged in the first pressure relief channel 112 of the first pressure relief component 110, and the plurality of second reinforcing ribs 114 are arranged at intervals along the second direction Y to divide the first pressure relief channel 112 into a plurality of sub-pressure relief channels extending along the first direction X and arranged in parallel along the second direction Y to achieve directional discharge of gas; at the same time, the arrangement of the second reinforcing ribs 114 can also effectively increase the structural strength of the first pressure relief component 110 to ensure the structural stability of the pressure relief assembly 100.

[0047] Optionally, the pressure relief assembly 100 includes a plurality of first pressure relief members 110, a first pressure relief member 110 is connected between any two adjacent second pressure relief members 120, any two adjacent second pressure relief members 120 and the corresponding first pressure relief member 110 are enclosed to form a receiving space 130, and a second pressure relief channel 121 in the second pressure relief member 120 is communicated with a first pressure relief channel 112 in at least one adjacent first pressure relief member 110. That is, each first pressure relief member 110 is detachably connected to two adjacent second pressure relief members 120 to enclose a receiving space 130, and the first pressure relief channel 112 in each first pressure relief member 110 can be communicated with the second pressure relief channel 121 in one or two second pressure relief members 120 to form a directional pressure relief channel. In this embodiment, multiple first pressure relief parts 110 are provided. Compared with providing only one first pressure relief part 110, when a section of the first pressure relief channel 112 is blocked or encounters a fault, only the corresponding first pressure relief part 110 can be repaired or replaced without replacing the entire first pressure relief part 110, which helps to reduce cost.

[0048] Among them, the first pressure relief channels 112 in the multiple first pressure relief parts 110 are interconnected, that is, only one of the multiple first pressure relief parts 110 needs to be provided with a pressure relief valve as the final discharge port. No matter which battery module 200 in which accommodating space 130 has thermal runaway, the generated high-temperature gas can flow along the second pressure relief channel 121 in the corresponding second pressure relief part 120 to the first pressure relief channel 112 in the multiple first pressure relief parts 110 and be discharged, thereby helping to simplify the overall design of the pressure relief channel.

[0049] It should be noted that the first pressure relief channels 112 in multiple first pressure relief parts 110 can also be isolated from each other. The first pressure relief channel 112 in each first pressure relief part 110 only needs to be connected to the second pressure relief channel 121 in the corresponding second pressure relief part 120. At this time, a pressure relief valve can be separately set on each first pressure relief part 110 as a discharge port, so that the high-temperature gas generated by each battery module 200 during thermal runaway can be discharged in a direction from the discharge port of the corresponding first pressure relief part 110 to reduce the impact on the battery modules 200 installed in other accommodating spaces 130.

[0050] In some embodiments, Figure 1 and Figure 4As shown, two second pressure relief channels 121 are provided in the second pressure relief member 120 between two adjacent accommodating spaces 130, and the two second pressure relief channels 121 are arranged in parallel along the first direction X; in the first direction X, pressure relief holes 122 are respectively opened on opposite sides of the second pressure relief member 120, and the pressure relief holes 122 are respectively connected to the corresponding second pressure relief channels 121. That is, two battery modules 200 are installed in one accommodating space 130, and the opposite sides of the second pressure relief member 120 between two adjacent accommodating spaces 130 correspond to one battery module 200 in the two accommodating spaces 130, that is, one second pressure relief member 120 is provided with pressure relief channels for two battery modules 200.

[0051] In some embodiments, the two second pressure relief channels 121 in the second pressure relief member 120 are interconnected, so that the two second pressure relief channels 121 can be simultaneously connected to the first pressure relief channel 112 in the first pressure relief member 110 corresponding to the two accommodating spaces 130 adjacent to the second pressure relief member 120, so that when the first pressure relief channel 112 in the first pressure relief member 110 corresponding to one of the accommodating spaces 130 fails such as being blocked, the high-temperature gas generated when the battery module 200 located in the accommodating space 130 has a thermal runaway can still be discharged through the first pressure relief channel 112 in the first pressure relief member 110 corresponding to the adjacent accommodating space 130, so as to reduce the risk of accidents such as explosions due to blockage of the pressure relief channel.

[0052] It should be noted that, although the two second pressure relief channels 121 in the second pressure relief member 120 are interconnected, an isolation plate is provided between the two pressure relief channels, and the two pressure relief channels are only interconnected on one side close to the first pressure relief member 110, so that the two second pressure relief channels 121 can simultaneously communicate with the first pressure relief channels 112 in the first pressure relief member 110 corresponding to the two accommodating spaces 130 adjacent to the second pressure relief member 120. The provision of the isolation plate can prevent the high-temperature gas generated after the thermal runaway of the battery module 200 on one side of the second pressure relief member 120 from affecting the battery module 200 on the other side, thereby reducing the mutual influence between the multiple battery modules 200.

[0053] In other embodiments, the two second pressure relief channels 121 in the second pressure relief member 120 are isolated from each other, and the two second pressure relief channels 121 in the second pressure relief member 120 are respectively connected to the first pressure relief channel 112 in the first pressure relief member 110 corresponding to the adjacent accommodation space 130. That is, the two second pressure relief channels 121 in the second pressure relief member 120 are independent of each other, and when thermal runaway occurs in a battery module 200 in an accommodation space 130, the generated high-temperature gas will only enter one of the second pressure relief channels 121 through the corresponding pressure relief hole 122, and then flow to the first pressure relief channel 112 in the first pressure relief member 110 corresponding to the accommodation space 130, and will not flow to the pressure relief channels corresponding to other battery modules 200, thereby effectively reducing the mutual influence between the battery modules 200.

[0054] It should be noted that at this time, the first pressure relief channels 112 in the multiple first pressure relief parts 110 are also independent of each other, and each first pressure relief part 110 is individually provided with a pressure relief valve as a discharge port, so that the high-temperature gas generated when thermal runaway occurs in each battery module 200 can be discharged in a direction along the corresponding pressure relief channel.

[0055] Optional, such as Figure 2 and Figure 3 As shown, one of the side of the first pressure relief member 110 facing the second pressure relief member 120 and the side of the second pressure relief member 120 facing the first pressure relief member 110 is provided with a mounting groove 123, and the other corresponding to the mounting groove 123 is provided with a mounting portion 113, and the mounting portion 113 is used to be inserted into the mounting groove 123, so that the first pressure relief channel 112 is connected with the second pressure relief channel 121. That is, the first pressure relief member 110 and the second pressure relief member 120 are detachably connected through the mutual cooperation of the mounting groove 123 and the mounting portion 113, so as to facilitate the rapid positioning and assembly of the first pressure relief member 110 and the second pressure relief member 120.

[0056] When the second pressure relief member 120 is provided with a mounting groove 123 and the first pressure relief member 110 is provided with a mounting portion 113, the mounting groove 123 can be located on the surface of the second pressure relief member 120 facing the accommodating space 130, and the mounting groove 123 is connected to the second pressure relief channel 121 in the second pressure relief member 120, and the mounting portion 113 is a hollow structure and is connected to the first pressure relief channel 112 in the first pressure relief member 110, thereby realizing the connection between the first pressure relief channel 112 and the second pressure relief channel 121. Correspondingly, when the first pressure relief member 110 is provided with a mounting groove 123 and the second pressure relief member 120 is provided with a mounting portion 113, the mounting groove 123 can be located on the supporting surface 111 of the first pressure relief member 110, and the mounting groove 123 is communicated with the first pressure relief channel 112 in the first pressure relief member 110, and the mounting portion 113 is a hollow structure and is communicated with the second pressure relief channel 121 in the second pressure relief member 120, thereby realizing the communication between the first pressure relief channel 112 and the second pressure relief channel 121.

[0057] It should be noted that the locations of the mounting groove 123 and the mounting portion 113 can be selected and adjusted according to actual design requirements, and no special restrictions are imposed herein.

[0058] like Figure 1 and Figure 5 As shown, the pressure relief assembly 100 further includes a fixing member 140, the fixing member 140 includes two clamping parts 141 and a connecting part 142 connected between the two clamping parts 141, and the two clamping parts 141 are respectively clamped with one side of two adjacent second pressure relief members 120 to connect the two adjacent second pressure relief members 120. That is, the fixing member 140 has a similar "X"-shaped structure, and realizes the stable installation between the two adjacent second pressure relief members 120 and the corresponding first pressure relief member 110 by clamping with the two adjacent second pressure relief members 120.

[0059] Among them, the second pressure relief member 120 can protrude from the side of the first pressure relief member 110 away from the support surface 111, and the fixing member 140 is arranged on the side of the protruding part of the second pressure relief member 120 away from the first pressure relief member 110, that is, the fixing member 140 is located at the bottom of the battery module 200 to reduce the space occupied by the fixing member 140; in addition, the fixing member 140 can also be arranged on the top or side of the battery module 200 to improve the assembly stability of the second pressure relief member 120 and the first pressure relief member 110. The specific setting position can be selected and adjusted according to actual design requirements, and there is no special limitation here.

[0060] Secondly, an embodiment of the present application provides a battery pack, which includes a pressure relief assembly. The specific structure of the pressure relief assembly refers to the above-mentioned embodiment. Since the battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0061] like Figure 6 As shown, the battery pack 10 includes a pressure relief assembly 100 and a battery module 200. The battery module 200 is arranged in the accommodating space 130 of the pressure relief assembly 100. The explosion-proof valve of the battery cell in the battery module 200 is connected to the pressure relief hole 122 in the pressure relief assembly 100. When the battery module 200 has thermal runaway, the generated high-temperature gas reaches the pressure relief hole 122 through the explosion-proof valve of the battery cell, and then is discharged through the second pressure relief channel 121 in the second pressure relief member 120 and the first pressure relief channel 112 in the first pressure relief member 110 in the pressure relief assembly 100, so as to avoid safety accidents such as explosion due to thermal runaway of the battery module 200.

[0062] Among them, two battery modules 200 are installed in a accommodating space 130, and the explosion-proof valves of the battery cells in the two battery modules 200 are arranged away from each other, that is, the explosion-proof valves of the battery cells in the two battery modules 200 are respectively facing the second pressure relief parts 120 on both sides of the accommodating space 130, and the second pressure relief parts 120 located between the two adjacent accommodating spaces 130 are provided with pressure relief channels for the two adjacent battery modules 200. This arrangement makes it possible to reduce the number of second pressure relief parts 120 when the number of modules is the same, thereby reducing the space occupied by the pressure relief assembly 100 and improving the space utilization of the battery pack 10.

[0063] Specifically, Figures 1 to 4 As shown, in the embodiment of the present application, a accommodating space 130 for installing the battery module 200 is formed by the first pressure relief member 110 and the second pressure relief member 120, and a pressure relief channel is provided in the first pressure relief member 110 and the second pressure relief member 120, so that the high-temperature gas generated by the thermal runaway of the battery module 200 can be discharged in a direction along the pressure relief channel; by adopting a detachable connection method, when the first pressure relief member 110 or the second pressure relief member 120 has a blockage or other fault, it is also convenient to disassemble, repair or replace. Compared with an integrated method such as welding, the installation method of the pressure relief assembly 100 in the present embodiment is simpler and more convenient, and is also more convenient for the assembly of the battery pack 10; in addition, the first pressure relief member 110 in the present embodiment can also serve as a supporting structure of the battery module 200 to support the battery module 200, so as to ensure the installation stability of the battery module 200.

[0064] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A pressure relief assembly, characterized in that: include: A first pressure relief member having a support surface, the support surface is used to support the battery module, and a first pressure relief channel is provided in the first pressure relief member; a second pressure relief member, detachably connected to the first pressure relief member, the second pressure relief member protruding from the support surface and forming a receiving space with the first pressure relief member, the receiving space being used to install the battery module, the second pressure relief member being provided with a second pressure relief channel, the second pressure relief channel being communicated with the first pressure relief channel; Among them, a pressure relief hole is opened on one side of the first pressure relief member and the second pressure relief member facing the accommodating space, and the pressure relief hole is used to connect to the explosion-proof valve of the battery cell in the battery module, and the pressure relief hole is connected to the first pressure relief channel and the second pressure relief channel.

2. The pressure relief assembly according to claim 1, characterized in that: The pressure relief assembly includes a plurality of second pressure relief parts, which are arranged at intervals along the first direction, and are respectively connected to the first pressure relief parts, and any two adjacent second pressure relief parts and the first pressure relief parts are enclosed to form the accommodating space.

3. The pressure relief assembly according to claim 2, characterized in that: The first pressure relief member is provided with a first pressure relief channel, and a plurality of second pressure relief channels in the second pressure relief members are respectively connected to the first pressure relief channel; or, A plurality of first pressure relief channels are provided in the first pressure relief member, and the plurality of first pressure relief channels are arranged at intervals along the first direction. The plurality of first pressure relief channels correspond one-to-one to the plurality of accommodating spaces, and the second pressure relief channel in the second pressure relief member is connected to the first pressure relief channel corresponding to at least one adjacent accommodating space.

4. The pressure relief assembly according to claim 2, characterized in that: The pressure relief assembly includes a plurality of the first pressure relief parts, wherein the first pressure relief part is connected between any two adjacent second pressure relief parts, and any two adjacent second pressure relief parts and the corresponding first pressure relief parts are enclosed to form the accommodating space, and the second pressure relief channel in the second pressure relief part is connected to the first pressure relief channel in at least one adjacent first pressure relief part.

5. The pressure relief assembly according to claim 4, characterized in that: The first pressure relief passages in the plurality of first pressure relief members are connected to each other.

6. The pressure relief assembly according to claim 4, characterized in that: Two second pressure relief channels are provided in the second pressure relief member located between two adjacent accommodating spaces, and the two second pressure relief channels are arranged in parallel along the first direction; in the first direction, the second pressure relief member is provided with pressure relief holes on opposite sides respectively, and the pressure relief holes are respectively connected to the corresponding second pressure relief channels.

7. The pressure relief assembly according to claim 6, characterized in that: The two second pressure relief channels in the second pressure relief member are connected to each other; or, The two second pressure relief channels in the second pressure relief member are isolated from each other, and the two second pressure relief channels in the second pressure relief member are respectively communicated with the first pressure relief channels in the first pressure relief member corresponding to the adjacent accommodating space.

8. The pressure relief assembly according to any one of claims 1 to 7, characterized in that: One of the side of the first pressure relief member facing the second pressure relief member and the side of the second pressure relief member facing the first pressure relief member is provided with a mounting groove, and the other corresponding to the position of the mounting groove is provided with a mounting portion protruding therefrom, and the mounting portion is used to be inserted into the mounting groove to connect the first pressure relief channel with the second pressure relief channel.

9. The pressure relief assembly according to any one of claims 2 to 7, characterized in that: The pressure relief assembly also includes a fixing member, which includes two clamping parts and a connecting part connected between the two clamping parts. The two clamping parts are respectively clamped with one side of two adjacent second pressure relief parts to connect the two adjacent second pressure relief parts.

10. A battery pack, characterized in that: The battery pack comprises: The pressure relief assembly according to any one of claims 1 to 9; The battery module is arranged in the accommodating space of the pressure relief component, and the explosion-proof valve of the battery cell in the battery module is communicated with the pressure relief hole in the pressure relief component.

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