Pressure relief liquid cooling assembly and battery pack

Abstract

The present application provides a pressure relief liquid cooling assembly and a battery pack. The pressure relief liquid cooling assembly comprises a first liquid cooling part and a second liquid cooling part arranged opposite the first liquid cooling part in a first direction, wherein a first coolant flow channel is provided in the first liquid cooling part, a second coolant flow channel is provided in the second liquid cooling part, a gap is provided between the second liquid cooling part and the first liquid cooling part to form a first pressure relief channel, a first pressure relief hole is formed in the first liquid cooling part, the first pressure relief hole passes through the first liquid cooling part in the first direction and is in communication with the first pressure relief channel, and the first pressure relief hole is arranged to be in communication with rupture valves of at least some of battery cells in a battery module. In the present application, the first pressure relief channel is formed by directly joining the first liquid cooling part and the second liquid cooling part, such that pressure relief and liquid cooling are integrated, which eliminates the need to separately provide the first pressure relief channel, thereby contributing to a reduction in the overall spatial footprint of the pressure relief liquid cooling assembly.

Description

Pressure relief liquid cooling components and battery pack

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on March 1, 2024, with application numbers 202410391379.7, 202420663427.9 and 202420663405.2, the entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a pressure relief liquid cooling assembly and a battery pack. Background Art

[0003] With the rapid development of battery technology, the safety design of battery packs has received widespread attention. A battery pack consists of multiple battery modules. When a cell in a module experiences thermal runaway, a large amount of high-temperature gas and flames are instantly released from within the cell. Related technologies incorporate a primary pressure relief channel and liquid cooling channels within the battery pack to prevent the spread of gas and flames within the battery pack, potentially leading to fires or explosions. SUMMARY OF THE INVENTION

[0004] However, in the related art, the designs of the first pressure relief channel and the liquid cooling channel are independent of each other. It is necessary to additionally set up a liquid cooling channel on the basis of the pressure relief assembly, or to additionally set up a first pressure relief channel on the basis of the liquid cooling assembly, which makes the overall space of the pressure relief liquid cooling assembly occupy a large proportion, which is not conducive to the space utilization of the battery pack when the pressure relief liquid cooling assembly is assembled into a battery pack.

[0005] The present application provides a pressure relief liquid cooling assembly, including a first pressure relief component, the first pressure relief component including:

[0006] a first liquid cooling element, wherein a first liquid cooling channel is provided in the first liquid cooling element;

[0007] a second liquid-cooling element disposed opposite to the first liquid-cooling element along a first direction, the second liquid-cooling element having a second liquid-cooling channel therein, the second liquid-cooling element being connected to the first liquid-cooling element, and a gap being defined between the second liquid-cooling element and the first liquid-cooling element to form a first pressure relief channel;

[0008] Among them, a first pressure relief hole is opened on the first liquid cooling part, and the first pressure relief hole passes through the first liquid cooling part along the first direction. The first pressure relief hole is connected to the first pressure relief channel, and the first pressure relief hole is configured to be connected to an explosion-proof valve of at least part of the battery cells in the battery module.

[0009] The present application also provides a battery pack. The battery pack includes:

[0010] A pressure relief liquid cooling assembly as described above;

[0011] The battery module is connected to the pressure relief liquid cooling assembly, and the explosion-proof valve of the battery cell in the battery module is connected to the first pressure relief hole in the pressure relief liquid cooling assembly. Beneficial effects

[0012] The pressure relief liquid cooling assembly provided in the present application forms a first pressure relief channel by directly splicing a first liquid cooling part and a second liquid cooling part, and directly opens a pressure relief hole on the first liquid cooling part to connect with the explosion-proof valve of the battery cell in the battery module. This can realize an integrated design of pressure relief liquid cooling of the battery module without the need to design a first pressure relief channel separately, thereby effectively reducing the overall space occupied by the pressure relief liquid cooling assembly.

[0013] The battery pack provided in the present application directly splices the first liquid cooling part and the second liquid cooling part of the pressure relief liquid cooling assembly to form a first pressure relief channel, and directly opens a pressure relief hole on the first liquid cooling part to communicate with the explosion-proof valve of the battery cell in the battery module. This can realize an integrated design of pressure relief liquid cooling of the battery module without the need to design a first pressure relief channel separately, thereby effectively reducing the overall space occupied by the pressure relief liquid cooling assembly, which is beneficial to improving the space utilization of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram of the three-dimensional structure of an embodiment of a pressure relief liquid cooling assembly provided in an embodiment of the present application;

[0015] FIG2 is a schematic diagram of an exploded structure of a pressure relief liquid cooling assembly provided in an embodiment of the present application;

[0016] FIG3 is a schematic cross-sectional view of a pressure relief liquid cooling assembly according to an embodiment of the present application;

[0017] FIG4 is a schematic diagram showing a planar structure comparison of a first liquid cooling plate and a second liquid cooling plate provided in an embodiment of the present application;

[0018] FIG5 is a schematic diagram comparing the planar structures of a first connecting plate and a second connecting plate provided in an embodiment of the present application;

[0019] FIG6 is a schematic diagram of a three-dimensional structure of a battery pack provided in an embodiment of the present application;

[0020] FIG7 is a schematic diagram of the three-dimensional structure of another embodiment of a pressure relief liquid cooling assembly provided in an embodiment of the present application;

[0021] FIG8 is a schematic diagram of a three-dimensional structure of a first pressure relief member provided in an embodiment of the present application;

[0022] FIG9 is a schematic diagram of a three-dimensional structure of a second pressure relief member provided in an embodiment of the present application;

[0023] FIG10 is a schematic cross-sectional view of a second pressure relief member provided in an embodiment of the present application;

[0024] FIG11 is a schematic diagram of a three-dimensional structure of a fixing member provided in an embodiment of the present application;

[0025] FIG12 is a schematic diagram of the assembly structure of a battery pack provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 10. Battery pack;

[0028] 100, pressure relief liquid cooling assembly; 11, first pressure relief component; 110, first liquid cooling component; 111, first liquid cooling channel; 112, first pressure relief hole; 113, first connecting plate; 114, first liquid cooling plate; 1111, support surface; 1131, mounting portion; 1141, first protrusion; 1142, second reinforcing rib; 120, second liquid cooling component; 121, second liquid cooling channel; 122, second pressure relief hole; 123, second connecting plate; 124, second liquid cooling plate; 1241, second protrusion; 130, first pressure relief channel; 140, water inlet; 150, water outlet; 160, sealing component; 161, groove; X, first direction; Y, second direction;

[0029] 12, second pressure relief member; 1201, second pressure relief channel; 1103, mounting groove; 1204, first reinforcing rib;

[0030] 14, fixing member; 1401, clamping portion; 1402, connecting portion;

[0031] 200, accommodation space; 300, battery module; 400, pressure relief pipe; 500, liquid cooling pipe. Modes for Carrying Out the Invention

[0032] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction 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.

[0033] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

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

[0036] First, an embodiment of the present application provides a pressure relief liquid cooling assembly, as shown in Figures 1 to 3. The pressure relief liquid cooling assembly 100 includes a first pressure relief component 11, which includes a first liquid cooling component 110 and a second liquid cooling component 120. The first liquid cooling component 110 is provided with a first liquid cooling channel 111. The second liquid cooling component 120 is arranged opposite to the first liquid cooling component 110 along a first direction X. The second liquid cooling component 120 is provided with a second liquid cooling channel 121. The second liquid cooling component 120 is connected to the first liquid cooling component 110. A gap is provided between the second liquid cooling component 120 and the first liquid cooling component 110 to form a first pressure relief channel 130. That is, the first liquid cooling component 110 and the second liquid cooling component 120 not only serve as cooling structures, but also directly form the first pressure relief channel 130 by splicing, thereby realizing an integrated design of pressure relief liquid cooling.

[0037] The first liquid cooling element 110 is provided with a first pressure relief hole 112, which extends through the first liquid cooling element 110 along a first direction X. The first pressure relief hole 112 is connected to a first pressure relief channel 130, and is configured to connect to explosion-proof valves of at least some of the battery cells in the battery module 300. Specifically, the first liquid cooling element 110 serves as the side of the pressure relief liquid cooling assembly 100 connected to the battery module 300. By providing a pressure relief hole in the first liquid cooling element 110 that connects to the first pressure relief channel 130 and connects to the explosion-proof valves of at least some of the battery cells in the battery module 300, when thermal runaway occurs in these battery cells, the generated high-temperature gas can enter the first pressure relief channel 130 through the pressure relief hole. While being discharged through the first pressure relief channel 130, the first and second liquid cooling elements 110, 120 also cool the gas within the first pressure relief channel 130, thereby reducing the risk of thermal runaway, diffusion, and explosion.

[0038] It should be noted that a water inlet 140 and a water outlet 150 are respectively provided on the first liquid cooling component 110 and the second liquid cooling component 120. The water inlet 140 and the water outlet 150 are configured to be connected to the liquid cooling pipe 500 to realize the circulation of the liquid cooling medium in the first liquid cooling channel 111 and the second liquid cooling channel 121.

[0039] The embodiment of the present application directly splices the first liquid cooling part 110 and the second liquid cooling part 120 to form the first pressure relief channel 130, and directly opens a pressure relief hole on the first liquid cooling part 110 to communicate with the explosion-proof valve of the battery cell in the battery module 300, so as to realize an integrated design of pressure relief liquid cooling of the battery module 300 without the need to separately design the first pressure relief channel 130, thereby effectively reducing the overall space occupied by the pressure relief liquid cooling assembly 100. When the pressure relief liquid cooling assembly 100 is applied to the battery pack 10, the space utilization rate of the battery pack 10 can be improved. At the same time, the direct splicing of the first liquid cooling part 110 and the second liquid cooling part 120 also makes the formation of the first pressure relief channel 130 simpler and more convenient, and also facilitates the investigation and maintenance of phenomena such as air leakage during the use of the pressure relief liquid cooling assembly 100.

[0040] Optionally, a second pressure relief hole 122 is defined in the second liquid cooling element 120. The second pressure relief hole 122 extends through the second liquid cooling element 120 along the first direction X. The second pressure relief hole 122 communicates with the first pressure relief channel 130. The second pressure relief hole 122 is configured to communicate with the explosion-proof valves of at least some of the battery cells in the battery module 300. That is, both opposing sides of the pressure relief liquid cooling assembly 100 in the first direction X can be configured to connect to the battery module 300 and respectively communicate with the explosion-proof valves of at least some of the battery cells in the corresponding battery module 300. In other words, one pressure relief liquid cooling assembly 100 can serve as the first pressure relief channel 130 for two battery modules 300, thereby further reducing the overall space occupied by the pressure relief liquid cooling assembly 100 and improving the space utilization of the corresponding battery pack 10.

[0041] In some embodiments, as shown in Figures 3 to 5, a plurality of first pressure relief holes 112 are provided on the first liquid cooling member 110, and a plurality of second pressure relief holes 122 are provided on the second liquid cooling member 120. In the first direction X, the plurality of first pressure relief holes 112 and the plurality of second pressure relief holes 122 are staggered, that is, the orthographic projections of the first pressure relief holes 112 and the second pressure relief holes 122 in the first direction X do not overlap, that is, in the first direction X, the first pressure relief hole 112 can be regarded as being located between two adjacent second pressure relief holes 122, and the second pressure relief hole 122 can be regarded as being located between two adjacent first pressure relief holes 112, thereby achieving the staggered arrangement of the first pressure relief holes 112 and the second pressure relief holes 122 in the first direction X. This is because the first pressure relief hole 112 is arranged to be connected to the explosion-proof valve of at least some of the battery cells in one battery module 300, and the second pressure relief hole 122 is connected to the explosion-proof valve of at least some of the battery cells in another battery module 300. When thermal runaway occurs in the battery cells in one of the battery modules 300, the gas and debris ejected from the battery cells will enter the first pressure relief channel 130 through the corresponding pressure relief hole. By staggering the first pressure relief hole 112 and the second pressure relief hole 122, the generated gas and debris can be prevented from affecting the battery cells in the other battery module 300, thereby reducing the risk of safety accidents such as thermal runaway spread and explosion.

[0042] It should be noted that when the pressure relief liquid cooling assembly 100 is assembled and connected with the battery module 300, a layer of mica sheet can be attached between the explosion-proof valve of the battery cell in the battery module 300 and the corresponding first pressure relief hole 112 or the second pressure relief hole 122. When the corresponding battery cell has thermal runaway, the flame ejected from the battery cell can break through the mica sheet and enter the first pressure relief channel 130 through the corresponding pressure relief hole. However, the setting of the mica sheet can play a certain buffering role and can play a certain blocking role on the debris ejected when the battery cell has thermal runaway, thereby reducing the impact on the battery cell in the battery module 300 on the other side.

[0043] Among them, the first pressure relief hole 112 and the second pressure relief hole 122 can extend along the second direction Y, and the second direction Y forms an angle with the first direction X, that is, the first pressure relief hole 112 and the second pressure relief hole 122 are strip-shaped, and multiple first pressure relief holes 112 and multiple second pressure relief holes 122 can be arranged in multiple rows and columns respectively, and their distribution method is consistent with the distribution method of multiple battery cells in the corresponding battery module 300, so that one pressure relief hole can be connected to the explosion-proof valves of multiple battery cells in the battery module 300, thereby reducing the number of openings on the first liquid cooling part 110 and the second liquid cooling part 120, and also facilitating the grouping design of multiple battery cells in the battery module 300.

[0044] In other embodiments, the pressure relief liquid cooling assembly 100 includes a third liquid cooling element, which is disposed between the first liquid cooling element 110 and the second liquid cooling element 120. The third liquid cooling element has a third liquid cooling channel disposed therein. A gap is provided between the third liquid cooling element and the first liquid cooling element 110 to form a first pressure relief channel 130. A gap is also provided between the third liquid cooling element and the second liquid cooling element 120 to form a first pressure relief channel 130. When battery modules 300 are disposed on either side of the first liquid cooling element 110 or the second liquid cooling element 120 of the pressure relief liquid cooling assembly 100, the third liquid cooling element can simultaneously cool the flames and gases emitted from the battery cells of both battery modules 300 during thermal runaway, and also act as a barrier to prevent the flames and gases emitted from the battery cells of one battery module 300 from affecting the other battery module 300, thereby further reducing the risk of safety accidents such as thermal runaway spreading and explosion.

[0045] Optionally, as shown in FIG3 , the first liquid-cooling element 110 includes a first connecting plate 113 and a first liquid-cooling plate 114 that are arranged relative to each other along a first direction X. The first liquid-cooling plate 114 protrudes in a direction away from the first connecting plate 113 to form a first protrusion 1141. The first protrusion 1141 and the first connecting plate 113 together form a first liquid-cooling channel 111. Specifically, the first liquid-cooling element 110 is formed by splicing the first connecting plate 113 and the first liquid-cooling plate 114 together. The first connecting plate 113 is a flat plate, and the first protrusion 1141 can be formed by stamping the first liquid-cooling plate 114. By splicing the first connecting plate 113 and the first liquid-cooling plate 114 together, the first liquid-cooling channel 111 is formed within the first liquid-cooling element 110 at a position corresponding to the first protrusion 1141.

[0046] Correspondingly, the second liquid-cooling element 120 includes a second connecting plate 123 and a second liquid-cooling plate 124 arranged opposite each other along the first direction X. The second liquid-cooling plate 124 protrudes away from the second connecting plate 123 to form a second protrusion 1241. The second protrusion 1241 and the second connecting plate 123 together form the second liquid-cooling channel 121. Specifically, the second connecting plate 123 is a flat plate, and the second protrusion 1241 can be formed by stamping the second liquid-cooling plate 124. By splicing the second connecting plate 123 and the second liquid-cooling plate 124 together, the second liquid-cooling channel 121 is formed within the second liquid-cooling element 120 at a location corresponding to the second protrusion 1241.

[0047] A first pressure relief channel 130 is formed between the second liquid cooling plate 124 and the first liquid cooling plate 114. Both the first protrusion 1141 and the second protrusion 1241 protrude toward the first pressure relief channel 130, thereby increasing the contact area between the first and second liquid cooling elements 110, 120 and the pressure relief gas, thereby improving the cooling effect of the pressure relief liquid cooling assembly 100. The first and second connecting plates 113, 123, serve as the connection sides to the battery module 300. By configuring them as flat plates, this helps improve the stability of the connection between the battery module 300 and the pressure relief liquid cooling assembly 100.

[0048] It should be noted that the raised portion may be formed on only one of the first and second liquid cooling plates 114, 124. Specifically, the first liquid cooling plate 114 may be raised in a direction away from the first connecting plate 113 to form the first raised portion 1141, or the second liquid cooling plate 124 may be raised in a direction away from the second connecting plate 123 to form the second raised portion 1241, while the other side facing the first pressure relief channel 130 remains a flat plate. The specific structures of the first and second liquid cooling plates 114, 124 can be selected and adjusted based on actual design requirements and are not particularly limited herein.

[0049] In some embodiments, in the first direction X, the first protrusion 1141 and the second protrusion 1241 are staggered, and the orthographic projections of the first protrusion 1141 and the second protrusion 1241 in the first direction X do not overlap. This arrangement enables the first protrusion 1141 and the second protrusion 1241 to be located in different areas in the first pressure relief channel 130, thereby helping to improve the contact uniformity between the pressure relief gas in the first pressure relief channel 130 and the pressure relief liquid cooling assembly 100, and further helping to improve the cooling effect of the pressure relief liquid cooling assembly 100.

[0050] In other embodiments, in the first direction X, a gap is provided between the first protrusion 1141 and the second protrusion 1241, that is, the first pressure relief channel 130 between the first liquid cooling plate 114 and the second liquid cooling plate 124 is designed as a whole surface, wherein the first pressure relief channel 130 at the position corresponding to the first protrusion 1141 and the second protrusion 1241 is relatively narrow, while the first pressure relief channel 130 at the corresponding position in other areas is relatively wide. This arrangement ensures that the pressure relief gas has sufficient circulation space and contact area between the first liquid cooling plate 114 and the second liquid cooling plate 124, thereby helping to ensure the cooling effect of the pressure relief liquid cooling assembly 100.

[0051] In some other embodiments, the side of the first protrusion 1141 facing the second liquid cooling plate 124 is at least partially in contact with the side of the second protrusion 1241 facing the first liquid cooling plate 114, that is, when the first liquid cooling component 110 and the second liquid cooling component 120 are spliced ​​to form the first pressure relief channel 130, the first protrusion 1141 and the second protrusion 1241 are in contact with each other at least in part, so that the pressure relief gas will automatically be diverted when passing through the abutment point between the first protrusion 1141 and the second protrusion 1241. This arrangement allows the gas and flame generated by thermal runaway of the battery cells in the battery module 300 to flow in a direction between the first liquid cooling component 110 and the second liquid cooling component 120, thereby helping to alleviate the spread of the gas and flame in the first pressure relief channel 130, thereby achieving directional pressure relief of the battery module 300 by the pressure relief liquid cooling assembly 100.

[0052] Among them, when the first protrusion 1141 and the second protrusion 1241 continuously abut against each other in the extension direction, the first pressure relief channel 130 can be divided into multiple sub-channels according to the specific shapes of the first protrusion 1141 and the second protrusion 1241, so as to further alleviate the spread of gas and flame in the first pressure relief channel 130, and realize the directional pressure relief of the battery module 300 by the pressure relief liquid cooling assembly 100.

[0053] It should be noted that the positional relationship between the first protrusion 1141 and the second protrusion 1241 can be selected and adjusted according to actual design requirements. It is only necessary to ensure the conduction of the first pressure relief channel 130 between the first liquid cooling part 110 and the second liquid cooling part 120 to achieve stable pressure relief of the pressure relief liquid cooling component 100. No special restrictions are made here.

[0054] In some embodiments, as shown in Figures 3 to 5, the first liquid-cooling channel 111 is arranged around the first pressure relief hole 112, that is, when designing the first liquid-cooling channel 111 in the first liquid-cooling component 110, the first liquid-cooling channel 111 as a whole can be arranged back and forth along the second direction Y. If the first liquid-cooling channel 111 is regarded as a plurality of first sub-channels extending along the second direction Y and interconnected, the first pressure relief hole 112 can be correspondingly arranged between two adjacent sub-channels to improve the cooling effect of the first liquid-cooling component 110 on the pressure relief gas.

[0055] Among them, part of the first sub-channels can be connected end to end, that is, part of the first sub-channels are enclosed to form an annular channel, and a pressure relief hole can be correspondingly set in the annular channel to increase the contact area between the pressure relief gas and the first liquid cooling part 110 after entering the first pressure relief channel 130 through the pressure relief hole, thereby further improving the cooling effect of the first liquid cooling part 110 on the pressure relief gas.

[0056] Correspondingly, in other embodiments, the second liquid-cooling channel 121 is arranged around the second pressure relief hole, that is, when designing the second liquid-cooling channel 121 in the second liquid-cooling component 120, the second liquid-cooling channel 121 as a whole can be arranged back and forth along the second direction Y. If the second liquid-cooling channel 121 is regarded as a plurality of second sub-channels extending along the second direction Y and interconnected, the second pressure relief hole 122 can be correspondingly arranged between two adjacent sub-channels to improve the cooling effect of the second liquid-cooling component 120 on the pressure relief gas.

[0057] Among them, part of the second sub-channels can be connected end to end, that is, part of the second sub-channels are enclosed to form an annular channel, and a pressure relief hole can be correspondingly set in the annular channel to increase the contact area between the pressure relief gas and the second liquid cooling part 120 after entering the first pressure relief channel 130 through the pressure relief hole, thereby further improving the cooling effect of the second liquid cooling part 120 on the pressure relief gas.

[0058] It should be noted that when the first liquid-cooling channel 111 and the second liquid-cooling channel 121 both form annular channels at corresponding positions, the corresponding first protrusion 1141 and the second protrusion 1241 cannot be set to be in complete contact at this position, otherwise a closed first pressure relief channel 130 will be formed at the position corresponding to the pressure relief hole, resulting in the pressure relief gas entering the first pressure relief channel 130 through the pressure relief hole being unable to be discharged through the pressure relief liquid cooling component 100, which may easily lead to safety accidents such as thermal runaway diffusion or explosion.

[0059] Optionally, as shown in Figures 2 and 3 , the pressure relief liquid cooling assembly 100 further includes a sealing member 160 connected between the first liquid cooling member 110 and the second liquid cooling member 120. In the first direction X, at least one of the two opposing surfaces of the sealing member 160 has a groove 161 formed therein, and the groove 161 is filled with sealant. Specifically, the first liquid cooling member 110 and the second liquid cooling member 120 are sealed by the sealing member 160. The sealing member 160 is annular in shape and, together with the first and second liquid cooling members 110 and 120, forms the sidewalls of the first pressure relief channel 130. Providing the groove 161 on the surface of the sealing member 160 and filling it with sealant improves the connection and sealing performance between the sealing member 160 and the first and second liquid cooling members 110 and 120, thereby preventing air leakage and other problems during use of the pressure relief liquid cooling assembly 100.

[0060] It should be noted that after the sealing member 160 is connected to the first liquid cooling member 110 and the second liquid cooling member 120, a layer of sealant can be applied to the outer surface of the corresponding connection between the sealing member 160 and the first liquid cooling member 110 and the second liquid cooling member 120 to further enhance the sealing effect of the pressure relief liquid cooling assembly 100 and reduce the risk of air leakage.

[0061] In some embodiments, as shown in Figures 7 and 8, the pressure relief liquid cooling assembly 100 further includes a second pressure relief member 12, which is detachably connected to the first pressure relief member 11. The second pressure relief member 12 has a support surface 1111, which is configured to support the battery module 300. The first pressure relief member 11 protrudes from the support surface 1111 and forms a receiving space 200 with the second pressure relief member 12. The receiving space 200 is configured to install the battery module 300. That is, the second pressure relief member 12 and the first pressure relief member 11 are detachably assembled to form the receiving space 200 configured to install the battery module 300, and the second pressure relief member 12 can serve as a support structure to support the battery module 300.

[0062] As shown in Figures 8 to 10, a second pressure relief passage 1201 is provided in the second pressure relief member 12, and a first pressure relief passage 130 is provided in the first pressure relief member 11. The first pressure relief passage 130 is in communication with the second pressure relief passage 1201. Furthermore, a first pressure relief hole 112 is provided on one side of the second pressure relief member 12 or the first pressure relief member 11 facing the accommodating space 200. The first pressure relief hole 112 is configured to be connected to an explosion-proof valve for connecting the battery cells in the battery module 300. The pressure relief hole 1202 is in communication with the second pressure relief passage 1201 or the first pressure relief passage 130. When thermal runaway occurs in the battery module 300, the generated high-temperature gas can enter the second pressure relief passage 1201 and the first pressure relief passage 130 through the explosion-proof valve of the battery cell and the pressure relief hole 1202 and be discharged in a timely manner, thereby avoiding safety accidents such as explosions caused by thermal runaway of the battery module 300.

[0063] The first pressure relief hole 112 can be located on the side of the first pressure relief member 11 facing the accommodation space 200 . Alternatively, the first pressure relief hole 112 can be located on the side of the second pressure relief member 12 facing the accommodation space 200 .

[0064] It should be noted that when the first pressure relief hole 112 is provided on the first pressure relief part 11, a pressure relief valve (not shown in the figure) is provided on the second pressure relief part 12; when the first pressure relief hole 112 is provided on the second pressure relief part 12, a pressure relief valve is provided on the first pressure relief part 11. The pressure relief valve serves as the final discharge outlet of the gas in the pressure relief liquid cooling assembly 100, and is configured to discharge the high-temperature gas generated when the battery module 300 thermally runs away from the pressure relief liquid cooling assembly 100.

[0065] Among them, the first pressure relief holes 112 extend along the second direction Y, and each first pressure relief hole 112 can simultaneously connect to the explosion-proof valves of multiple battery cells in the battery module 300, that is, the first pressure relief holes 112 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 300.

[0066] Correspondingly, when the first pressure relief holes 112 are provided on the first pressure relief member 11, a plurality of first reinforcing ribs 1204 extending along the second direction Y can also be provided within the first pressure relief channel 130 within the first pressure relief member 11. Each first reinforcing rib 1204 is located between two adjacent rows of first pressure relief holes 112, thereby dividing the first pressure relief channel 130 into multiple sub-channels, thereby forming directional pressure relief channels corresponding to each row of battery cells in the battery module 300. Furthermore, the provision of the first reinforcing ribs 1204 can also increase the structural strength of the first pressure relief member 11, ensuring the structural stability of the pressure relief liquid cooling assembly 100. The multiple sub-channels are interconnected on one side along the second direction Y, thereby enabling communication between the multiple sub-channels and the second pressure relief channel 1201 in the second pressure relief member 12.

[0067] In the embodiment of the present application, a receiving space 200 is formed by the second pressure relief member 12 and the first pressure relief member 11 for installing the battery module 300, and a pressure relief channel is provided in the second pressure relief member 12 and the first pressure relief member 11, so that the high-temperature gas generated by the thermal runaway of the battery module 300 can be discharged in a direction along the pressure relief channel; by adopting a detachable connection method, when the second pressure relief member 12 or the first pressure relief member 11 has a blockage or other fault, it is also convenient to disassemble, repair or replace it. Compared with an integrated method such as welding, the installation method of the pressure relief liquid cooling assembly 100 in this embodiment is simpler and more convenient; in addition, the second pressure relief member 12 in this embodiment can also serve as a supporting structure of the battery module 300 to support the battery module 300 to ensure the installation stability of the battery module 300.

[0068] Optionally, as shown in FIG7 , the pressure relief liquid cooling assembly 100 includes a plurality of first pressure relief members 11, which are spaced apart along a first direction X. The plurality of first pressure relief members 11 are respectively connected to the second pressure relief members 12, and any two adjacent first pressure relief members 11 and second pressure relief members 12 enclose a receiving space 200. That is, the pressure relief liquid cooling assembly 100 is formed with a plurality of receiving spaces 200, each of which can be configured to accommodate one or two battery modules 300. The explosion-proof valve of the battery cell in each battery module 300 is communicated with the first pressure relief hole 112 on the adjacent first pressure relief member 11, and is communicated with the first pressure relief channel 130 in the corresponding first pressure relief member 11. The first pressure relief channel 130 in the first pressure relief member 11 is respectively communicated with the second pressure relief channel 1201 in the second pressure relief member 12.

[0069] In some embodiments, a second pressure relief passage 1201 is defined within the second pressure relief member 12, and the first pressure relief passages 130 within the plurality of first pressure relief members 11 are respectively connected to the second pressure relief passage 1201. That is, the pressure relief liquid cooling assembly 100 includes a second pressure relief member 12 and a plurality of first pressure relief members 11, the plurality of first pressure relief members 11 are simultaneously connected to the second pressure relief member 12, the second pressure relief member 12 is defined within the second pressure relief passage 1201, and the first pressure relief passages 130 within the plurality of first pressure relief members 11 are simultaneously connected to the second pressure relief passage 1201, thereby forming directional pressure relief passages.

[0070] In other embodiments, the second pressure relief member 12 is provided with a plurality of second pressure relief channels 1201, which are spaced apart along the first direction X. The plurality of second pressure relief channels 1201 correspond one-to-one to the plurality of accommodation spaces 200, and the first pressure relief channel 130 in the first pressure relief member 11 is connected to the second pressure relief channel 1201 corresponding to at least one adjacent accommodation space 200. That is, although the pressure relief liquid cooling assembly 100 includes only one second pressure relief member 12, the second pressure relief member 12 is provided with a plurality of spaced apart second pressure relief channels 1201, each of which is located at the bottom of one of the accommodation spaces 200. When a battery module 300 experiences thermal runaway, the generated high-temperature gas flows through the first pressure relief channel 130 in the corresponding first pressure relief member 11 to the second pressure relief channel 1201 corresponding to the adjacent accommodation space 200 and is discharged, thereby reducing the impact on the battery modules 300 installed in other accommodation spaces 200.

[0071] It should be noted that when the pressure relief liquid cooling assembly 100 includes a second pressure relief part 12 and multiple first pressure relief parts 11, the multiple first pressure relief parts 11 can be directly plugged into the support surface 1111 of the second pressure relief part 12 in sequence along the first direction X; when there is only one second pressure relief channel 1201 in the second pressure relief part 12, a corresponding pressure relief valve can be set on the second pressure relief part 12 as the final outlet; and when multiple second pressure relief channels 1201 are arranged at intervals along the first direction X in the second pressure relief part 12, a pressure relief valve can be set on the second pressure relief part 12 corresponding to each second pressure relief channel 1201 as the final outlet of each pressure relief channel. The specific setting method can be selected and adjusted according to actual design requirements, and it is only necessary to ensure that the high-temperature gas generated when the battery module 300 undergoes thermal runaway can be discharged smoothly.

[0072] Among them, a plurality of second reinforcing ribs 1142 extending along the first direction X can be set in the second pressure relief channel 1201 of the second pressure relief component 12, and the plurality of second reinforcing ribs 1142 are arranged at intervals along the second direction Y to divide the second pressure relief channel 1201 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 setting of the second reinforcing ribs 1142 can also effectively increase the structural strength of the second pressure relief component 12 to ensure the structural stability of the pressure relief liquid cooling assembly 100.

[0073] Optionally, the pressure relief liquid cooling assembly 100 includes multiple second pressure relief members 12, with a second pressure relief member 12 connected between any two adjacent first pressure relief members 11. Any two adjacent first pressure relief members 11 and the corresponding second pressure relief member 12 enclose a receiving space 200, and the first pressure relief channel 130 in the first pressure relief member 11 communicates with the second pressure relief channel 1201 in at least one adjacent second pressure relief member 12. That is, each second pressure relief member 12 is detachably connected to two adjacent first pressure relief members 11 to enclose a receiving space 200, and the second pressure relief channel 1201 in each second pressure relief member 12 can communicate with the first pressure relief channel 130 in one or two first pressure relief members 11 to form a directional pressure relief channel. In this embodiment, multiple second pressure relief parts 12 are provided. Compared with providing only one second pressure relief part 12, when a section of the second pressure relief channel 1201 is blocked or encounters a fault, only the corresponding second pressure relief part 12 can be repaired or replaced without replacing the entire part, thereby helping to reduce cost losses.

[0074] Among them, the second pressure relief channels 1201 in the multiple second pressure relief parts 12 are interconnected, that is, only one of the multiple second pressure relief parts 12 needs to be provided with a pressure relief valve as the final discharge outlet. No matter which battery module 300 in which accommodating space 200 experiences thermal runaway, the high-temperature gas generated can flow along the first pressure relief channel 130 in the corresponding first pressure relief part 11 to the second pressure relief channel 1201 in the multiple second pressure relief parts 12 and be discharged, thereby helping to simplify the overall design of the pressure relief channel.

[0075] It should be noted that the second pressure relief channels 1201 in multiple second pressure relief parts 12 can also be isolated from each other. The second pressure relief channel 1201 in each second pressure relief part 12 only needs to be connected to the first pressure relief channel 130 in the corresponding first pressure relief part 11. At this time, a pressure relief valve can be separately set on each second pressure relief part 12 as an exhaust port, so that the high-temperature gas generated by each battery module 300 during thermal runaway can be discharged in a direction from the exhaust port of the corresponding second pressure relief part 12 to reduce the impact on the battery modules 300 installed in other accommodating spaces 200.

[0076] In some embodiments, as shown in Figures 7 and 10, two first pressure relief channels 130 are provided in the first pressure relief member 11 located between two adjacent accommodating spaces 200. The two first pressure relief channels 130 are arranged side by side along the first direction X. In the first direction X, the first pressure relief hole 112 and the second pressure relief hole 122 are distributed on opposite sides of the first pressure relief member 11, and the first pressure relief hole 112 and the second pressure relief hole 122 are respectively connected to the corresponding first pressure relief channels 130. That is, two battery modules 300 are installed in one accommodating space 200, and the opposite sides of the first pressure relief member 11 located between two adjacent accommodating spaces 200 correspond to one battery module 300 in the two accommodating spaces 200, respectively. In other words, one first pressure relief member 11 is provided with pressure relief channels for two battery modules 300.

[0077] In some embodiments, the two first pressure relief channels 130 in the first pressure relief member 11 are interconnected, so that the two first pressure relief channels 130 can be simultaneously connected to the second pressure relief channels 1201 in the second pressure relief member 12 corresponding to the two accommodating spaces 200 adjacent to the first pressure relief member 11, so that when the second pressure relief channel 1201 in the second pressure relief member 12 corresponding to one of the accommodating spaces 200 fails such as being blocked, the high-temperature gas generated when the battery module 300 located in the accommodating space 200 experiences thermal runaway can still be discharged through the second pressure relief channel 1201 in the second pressure relief member 12 corresponding to the adjacent accommodating space 200, thereby reducing the risk of accidents such as explosions due to blockage of the pressure relief channel.

[0078] It should be noted that although the two first pressure relief channels 130 in the first pressure relief member 11 are interconnected, a partition plate is provided between the two pressure relief channels, and the two pressure relief channels are only interconnected on the side of the two pressure relief channels close to the second pressure relief member 12. This allows the two first pressure relief channels 130 to simultaneously communicate with the second pressure relief channels 1201 in the second pressure relief member 12 corresponding to the two adjacent accommodating spaces 200 of the first pressure relief member 11. The provision of the partition plate prevents the high-temperature gas generated by thermal runaway of the battery module 300 on one side of the first pressure relief member 11 from affecting the battery module 300 on the other side, thereby reducing the mutual influence between the multiple battery modules 300.

[0079] In other embodiments, the two first pressure relief channels 130 in the first pressure relief member 11 are isolated from each other, and the two first pressure relief channels 130 in the first pressure relief member 11 are respectively connected to the second pressure relief channels 1201 in the second pressure relief member 12 corresponding to the adjacent accommodating space 200. That is, the two first pressure relief channels 130 in the first pressure relief member 11 are independent of each other. When a battery module 300 in one accommodating space 200 experiences thermal runaway, the generated high-temperature gas will only enter one of the first pressure relief channels 130 through the corresponding pressure relief hole, and then flow to the second pressure relief channel 1201 in the second pressure relief member 12 corresponding to the accommodating space 200, and will not flow to the pressure relief channels corresponding to other battery modules 300, thereby effectively reducing the mutual influence between the battery modules 300.

[0080] It should be noted that, at this time, the second pressure relief channels 1201 in the multiple second pressure relief parts 12 are also independent of each other, and each second pressure relief part 12 is separately provided with a pressure relief valve as an exhaust port, so that the high-temperature gas generated when thermal runaway occurs in each battery module 300 can be discharged in a direction along the corresponding pressure relief channel.

[0081] Optionally, as shown in Figures 8 and 9, a mounting groove 1103 is defined on one of the side of the second pressure relief member 12 facing the first pressure relief member 11 and the side of the first pressure relief member 11 facing the second pressure relief member 12. A mounting portion 1131 is protruded from the other side corresponding to the mounting groove 1103. The mounting portion 1131 is configured to be inserted into the mounting groove 1103 to connect the second pressure relief channel 1201 with the first pressure relief channel 130. That is, the second pressure relief member 12 and the first pressure relief member 11 are detachably connected through the mutual cooperation between the mounting groove 1103 and the mounting portion 1131, thereby facilitating rapid positioning and assembly of the second pressure relief member 12 and the first pressure relief member 11.

[0082] Among them, when the first pressure relief member 11 is provided with a mounting groove 1103 and the second pressure relief member 12 is provided with a mounting portion 1131, the mounting groove 1103 can be located on the surface of the first pressure relief member 11 facing the accommodating space 200, and the mounting groove 1103 is connected to the first pressure relief channel 130 in the first pressure relief member 11, and the mounting portion 1131 is a hollow structure and is connected to the second pressure relief channel 1201 in the second pressure relief member 12, thereby realizing the connection between the second pressure relief channel 1201 and the first pressure relief channel 130. correspondingly, when the second pressure relief member 12 is provided with a mounting groove 1103 and the first pressure relief member 11 is provided with a mounting portion 1131, the mounting groove 1103 can be located on the support surface 1111 of the second pressure relief member 12, and the mounting groove 1103 is communicated with the second pressure relief channel 1201 in the second pressure relief member 12, and the mounting portion 1131 is a hollow structure and is communicated with the first pressure relief channel 130 in the first pressure relief member 11, thereby realizing the communication between the second pressure relief channel 1201 and the first pressure relief channel 130.

[0083] It should be noted that the locations of the mounting groove 1103 and the mounting portion 1131 can be selected and adjusted according to actual design requirements, and are not particularly limited here.

[0084] As shown in Figures 7 and 11, the pressure relief liquid cooling assembly 100 further includes a fixing member 14, which includes two clamping portions 1401 and a connecting portion 1402 connected between the two clamping portions 1401. The two clamping portions 1401 respectively clamp onto one side of two adjacent first pressure relief members 11 to connect the two adjacent first pressure relief members 11. In other words, the fixing member 14 has a structure similar to an "X" shape, and by clamping onto the two adjacent first pressure relief members 11, it achieves stable installation between the two adjacent first pressure relief members 11 and the corresponding second pressure relief member 12.

[0085] The first pressure relief member 11 can protrude from the side of the second pressure relief member 12 that is away from the support surface 1111, and the fixing member 14 is arranged on the side of the protruding portion of the first pressure relief member 11 that is away from the second pressure relief member 12, that is, the fixing member 14 is located at the bottom of the battery module 300 to reduce the space occupied by the fixing member 14. In addition, the fixing member 14 can also be arranged on the top or side of the battery module 300 to improve the assembly stability of the first pressure relief member 11 and the second pressure relief member 12. The specific location of the fixing member 14 can be selected and adjusted according to actual design requirements and is not particularly limited here.

[0086] Secondly, an embodiment of the present application provides a battery pack, which includes a pressure relief liquid cooling assembly. The specific structure of the pressure relief liquid cooling assembly refers to the above embodiment. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0087] As shown in Figure 6, the battery pack 10 includes a pressure relief liquid cooling assembly 100 and a battery module 300. The battery module 300 is connected to the pressure relief liquid cooling assembly 100, and the explosion-proof valves of the battery cells in the battery module 300 are connected to the first pressure relief hole 112 or the second pressure relief hole 122 in the pressure relief liquid cooling assembly 100. The battery module 300 can be directly bonded to the pressure relief liquid cooling assembly 100 as a whole, facilitating rapid assembly of the battery pack 10. When the battery module 300 is bonded to the first liquid cooling element 110 in the pressure relief liquid cooling assembly 100, the explosion-proof valves of at least some of the battery cells in the battery module 300 are connected to the first pressure relief hole 112 in the first liquid cooling element 110. When the battery module 300 is bonded to the second liquid cooling element 120 in the pressure relief liquid cooling assembly 100, the explosion-proof valves of at least some of the battery cells in the battery module 300 are connected to the second pressure relief hole 122 in the second liquid cooling element 120. When thermal runaway occurs in the battery cells of the battery module 300, the gas and flame ejected from the battery cells enter the first pressure relief channel 130 through the corresponding pressure relief holes and are discharged. At the same time, the first liquid cooling element 110 and the second liquid cooling element 120 cool the ejected gas and flame to reduce the risk of safety accidents such as thermal runaway spread and explosion.

[0088] Specifically, as shown in Figures 1 to 3, the embodiment of the present application directly splices the first liquid cooling member 110 and the second liquid cooling member 120 to form a first pressure relief channel 130, and directly opens a pressure relief hole on the first liquid cooling member 110 to communicate with the explosion-proof valve of the battery cell in the battery module 300, thereby realizing an integrated design of pressure relief liquid cooling of the battery module 300 without the need to additionally design the first pressure relief channel 130, thereby effectively reducing the overall space occupied by the pressure relief liquid cooling assembly 100. When the pressure relief liquid cooling assembly 100 is applied to the battery pack 10, the space utilization rate of the battery pack 10 can be improved. At the same time, the direct splicing of the first liquid cooling member 110 and the second liquid cooling member 120 also makes the formation of the first pressure relief channel 130 simpler and more convenient, and also facilitates the investigation and maintenance of leakage and other phenomena that occur during the use of the pressure relief liquid cooling assembly 100.

[0089] In some embodiments, as shown in FIG6 , a battery pack 10 includes multiple pressure relief liquid cooling assemblies 100 , which are spaced apart along a first direction X. An accommodation space 200 is formed between any two adjacent pressure relief liquid cooling assemblies 100 . The accommodation space 200 is configured to accommodate a battery module 300 , i.e., a pressure relief liquid cooling assembly 100 is provided on each side of a battery module 300 . On the one hand, by simultaneously adhering the pressure relief liquid cooling assemblies 100 on both sides to the battery module 300 , the installation stability of the battery module 300 can be improved, thereby enhancing the overall structural stability of the battery pack 10 . On the other hand, by simultaneously providing the pressure relief liquid cooling assemblies 100 on both sides of the battery module 300 , different battery cells in the battery module 300 can select different first pressure relief channels 130 , thereby facilitating the arrangement design of multiple battery cells in the battery module 300 to meet different usage requirements.

[0090] Among them, the battery cell includes a positive electrode and a negative electrode, and the explosion-proof valve is set at one end of the positive electrode or the negative electrode. When multiple battery cells are assembled into a battery module 300, the positive and negative electrodes in the multiple battery cells will have different orientations according to the series and parallel requirements. Taking the explosion-proof valve set at one end of the positive electrode as an example, when a pressure relief liquid cooling assembly 100 is provided on both sides of the battery module 300, the battery cell with the positive electrode facing one side is connected to the pressure relief hole on the corresponding pressure relief liquid cooling assembly 100, and the battery cell with the positive electrode facing the other side is connected to the pressure relief hole on the corresponding other pressure relief liquid cooling assembly 100, that is, the multiple battery cells in a battery module 300 can choose two different first pressure relief channels 130 for pressure relief, which can meet the arrangement design of the multiple battery cells in the battery module 300 while also realizing directional pressure relief of the battery module 300.

[0091] The battery pack 10 also includes a pressure relief pipe 400, which is connected to the first pressure relief channels 130 in multiple pressure relief liquid cooling components 100. That is, each pressure relief liquid cooling component 100 is provided with an exhaust hole, and the pressure relief pipe 400 is connected to the corresponding first pressure relief channel 130 through the exhaust holes on each pressure relief liquid cooling component 100, so that the gas and flame generated by thermal runaway flow through the first pressure relief channel 130 in the pressure relief liquid cooling component 100 into the pressure relief pipe 400, and then are discharged through the pressure relief pipe 400, thereby achieving directional pressure relief.

[0092] It should be noted that the location of the exhaust hole on the pressure relief liquid cooling component 100 needs to avoid the liquid cooling flow channels in the first liquid cooling component 110 and the second liquid cooling component 120 to avoid the liquid cooling medium from interfering with the pressure relief process, and at the same time, it can also avoid the pressure relief gas from affecting the cooling process of the first liquid cooling component 110 and the second liquid cooling component 120.

[0093] Correspondingly, the battery pack 10 also includes a liquid cooling pipe 500. The first liquid cooling component 110 and the second liquid cooling component 120 are correspondingly provided with a water inlet 140 and a water outlet 150. The liquid cooling pipe 500 is connected to the first liquid cooling channel 111 and the second liquid cooling channel 121 through the water inlet 140 and the water outlet 150. The liquid cooling pipe 500 is configured to introduce and discharge liquid cooling medium to achieve circulation of the liquid cooling medium in the first liquid cooling channel 111 and the second liquid cooling channel 121.

[0094] In some embodiments, as shown in Figure 12, the battery pack 10 includes a pressure relief liquid cooling assembly 100 and a battery module 300. The battery module 300 is arranged in the accommodating space 200 of the pressure relief liquid cooling assembly 100. The explosion-proof valve of the battery cell in the battery module 300 is connected to the pressure relief hole 1202 in the pressure relief liquid cooling assembly 100. When the battery module 300 has thermal runaway, the high-temperature gas generated reaches the pressure relief hole 1202 through the explosion-proof valve of the battery cell, and then is discharged through the first pressure relief channel 130 in the first pressure relief component 11 and the second pressure relief channel 1201 in the second pressure relief component 12 in the pressure relief liquid cooling assembly 100, so as to avoid safety accidents such as explosion due to thermal runaway of the battery module 300.

[0095] Among them, two battery modules 300 are installed in a accommodating space 200, and the explosion-proof valves of the battery cells in the two battery modules 300 are set away from each other, that is, the explosion-proof valves of the battery cells in the two battery modules 300 are respectively facing the first pressure relief parts 11 on both sides of the accommodating space 200, and the first pressure relief parts 11 located between the two adjacent accommodating spaces 200 are provided with pressure relief channels for the two adjacent battery modules 300. This arrangement makes it possible to reduce the number of first pressure relief parts 11 with the same number of modules, thereby reducing the space occupied by the pressure relief liquid cooling assembly 100 and improving the space utilization of the battery pack 10.

[0096] Specifically, as shown in Figures 7 to 10, in the embodiment of the present application, a accommodating space 200 is formed by the second pressure relief member 12 and the first pressure relief member 11 to install the battery module 300, and a pressure relief channel is provided in the second pressure relief member 12 and the first pressure relief member 11, so that the high-temperature gas generated by the thermal runaway of the battery module 300 can be discharged in a direction along the pressure relief channel; by adopting a detachable connection method, when the second pressure relief member 12 or the first pressure relief member 11 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 liquid cooling assembly 100 in this embodiment is simpler and more convenient, and is also more convenient for the assembly of the battery pack 10; in addition, the second pressure relief member 12 in this embodiment can also serve as a supporting structure for the battery module 300 to support the battery module 300 to ensure the installation stability of the battery module 300.

Claims

1. A pressure relief liquid cooling assembly, comprising a first pressure relief member, wherein the first pressure relief member comprises: a first liquid cooling element, wherein a first liquid cooling channel is provided in the first liquid cooling element; a second liquid-cooling element disposed opposite to the first liquid-cooling element along a first direction, the second liquid-cooling element having a second liquid-cooling channel therein, the second liquid-cooling element being connected to the first liquid-cooling element, and a gap being defined between the second liquid-cooling element and the first liquid-cooling element to form a first pressure relief channel; Among them, a first pressure relief hole is opened on the first liquid cooling part, and the first pressure relief hole passes through the first liquid cooling part along the first direction. The first pressure relief hole is connected to the first pressure relief channel, and the first pressure relief hole is configured to be connected to an explosion-proof valve of at least part of the battery cells in the battery module.

2. The pressure relief liquid cooling assembly according to claim 1, wherein: A second pressure relief hole is provided on the second liquid cooling member, and the second pressure relief hole penetrates the second liquid cooling member along the first direction. The second pressure relief hole is connected to the pressure relief channel, and the second pressure relief hole is configured to be connected to an explosion-proof valve of at least some of the battery cells in the battery module.

3. The pressure relief liquid cooling assembly according to claim 2, wherein: The first liquid cooling element is provided with a plurality of first pressure relief holes, and the second liquid cooling element is provided with a plurality of second pressure relief holes. In the first direction, the plurality of first pressure relief holes and the plurality of second pressure relief holes are staggered.

4. The pressure relief liquid cooling assembly according to claim 1, wherein: The first liquid cooling member includes a first connecting plate and a first liquid cooling plate arranged opposite to each other along the first direction, the first liquid cooling plate protrudes in a direction away from the first connecting plate to form a first protrusion, and the first protrusion and the first connecting plate enclose one another to form the first liquid cooling channel; or The second liquid cooling component includes a second connecting plate and a second liquid cooling plate arranged opposite to each other along the first direction. The second liquid cooling plate protrudes in a direction away from the second connecting plate to form a second protrusion. The second protrusion and the second connecting plate are combined to form the second liquid cooling channel. The pressure relief channel is formed between the second liquid cooling plate and the first liquid cooling plate.

5. The pressure relief liquid cooling assembly according to claim 1, wherein: The first liquid cooling member includes a first connecting plate and a first liquid cooling plate disposed opposite to each other along the first direction, the first liquid cooling plate protruding in a direction away from the first connecting plate to form a first protrusion, and the first protrusion and the first connecting plate enclose a first liquid cooling channel; The second liquid cooling component includes a second connecting plate and a second liquid cooling plate arranged opposite to each other along the first direction. The second liquid cooling plate protrudes in a direction away from the second connecting plate to form a second protrusion. The second protrusion and the second connecting plate are combined to form the second liquid cooling channel. The pressure relief channel is formed between the second liquid cooling plate and the first liquid cooling plate.

6. The pressure relief liquid cooling assembly according to claim 5, wherein: In the first direction, the first protrusion and the second protrusion are staggered.

7. The pressure relief liquid cooling assembly according to claim 5, wherein: In the first direction, a gap is provided between the first protrusion and the second protrusion; or, A side of the first protrusion facing the second liquid cooling plate at least partially abuts against a side of the second protrusion facing the first liquid cooling plate.

8. The pressure relief liquid cooling assembly according to claim 2, wherein: The first liquid-cooling channel is arranged around the first pressure relief hole; and / or the second liquid-cooling channel is arranged around the second pressure relief hole.

9. The pressure relief liquid cooling component according to any one of claims 1 to 8, further comprising a seal, wherein the seal is connected between the first liquid cooling component and the second liquid cooling component, and in the first direction, at least one surface on the opposite sides of the seal is provided with a groove, and the groove is filled with sealant.

10. The pressure relief liquid cooling assembly according to any one of claims 1 to 9, further comprising a second pressure relief member detachably connected to the first pressure relief member, the second pressure relief member having a support surface configured to support the battery module, the first pressure relief member protruding from the support surface and forming an accommodation space with the second pressure relief member, the accommodation space being configured to accommodate the battery module, the second pressure relief member having a second pressure relief channel therein, the second pressure relief channel being in communication with the first pressure relief channel; in, The first pressure relief hole is located on a side of the first pressure relief member facing the accommodating space.

11. The pressure relief liquid cooling assembly according to claim 10, wherein: The pressure relief liquid cooling assembly includes a plurality of first pressure relief parts, which are arranged at intervals along the first direction. The plurality of first pressure relief parts are respectively connected to the second pressure relief parts, and any two adjacent first pressure relief parts and the second pressure relief parts are enclosed to form the accommodating space.

12. The pressure relief liquid cooling assembly according to claim 11, wherein: A second pressure relief channel is provided in the second pressure relief member, and the first pressure relief channels in the plurality of first pressure relief members are respectively connected to the second pressure relief channel; or, A plurality of second pressure relief channels are provided in the second pressure relief member, and the plurality of second pressure relief channels are arranged at intervals along the first direction. The plurality of second pressure relief channels correspond one-to-one to the plurality of accommodating spaces, and the first pressure relief channel in the first pressure relief member is connected to the second pressure relief channel corresponding to at least one adjacent accommodating space.

13. The pressure relief liquid cooling assembly according to claim 11, wherein: The pressure relief liquid cooling assembly includes a plurality of second pressure relief parts, and a second pressure relief part is connected between any two adjacent first pressure relief parts. Any two adjacent first pressure relief parts and the corresponding second pressure relief parts are enclosed to form the accommodating space, and the first pressure relief channel in the first pressure relief part is connected to the second pressure relief channel in at least one adjacent second pressure relief part.

14. The pressure relief liquid cooling assembly according to claim 13, wherein: The second pressure relief channels in the plurality of second pressure relief members are communicated with each other.

15. The pressure relief liquid cooling assembly according to claim 13, wherein: Two first pressure relief channels are provided in the first pressure relief member located between two adjacent accommodating spaces, and the two first pressure relief channels are arranged side by side along the first direction; the first pressure relief hole and the second pressure relief hole are respectively connected to the corresponding first pressure relief channels.

16. The pressure relief liquid cooling assembly according to claim 15, wherein: The two first pressure relief channels in the first pressure relief member are connected to each other; or, The two first pressure relief channels in the first pressure relief member are isolated from each other, and the two first pressure relief channels in the first pressure relief member are respectively communicated with the second pressure relief channels in the second pressure relief member corresponding to the adjacent accommodating space.

17. The pressure relief liquid cooling assembly according to any one of claims 10 to 16, wherein: One of the side of the second pressure relief member facing the first pressure relief member and the side of the first pressure relief member facing the second 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, and the mounting portion is configured to be inserted into the mounting groove so that the second pressure relief channel is connected to the first pressure relief channel.

18. The pressure relief liquid cooling assembly according to any one of claims 11 to 16, further comprising a fixing member, wherein the fixing member comprises two clamping parts and a connecting part connected between the two clamping parts, the two clamping parts respectively clamping with one side of two adjacent first pressure relief parts to connect the two adjacent first pressure relief parts.

19. A battery pack, comprising: The pressure relief liquid cooling assembly according to any one of claims 1 to 18; The battery module is connected to the pressure relief liquid cooling assembly, and the explosion-proof valve of the battery cell in the battery module is connected to the first pressure relief hole in the pressure relief liquid cooling assembly.

20. The battery pack according to claim 19, wherein: The battery pack includes a plurality of the pressure relief liquid cooling components, which are arranged at intervals along the first direction, and a storage space is formed between any two adjacent pressure relief liquid cooling components, and the storage space is configured to install the battery module; the battery pack also includes a pressure relief pipe, which is connected to the first pressure relief channel in the plurality of the pressure relief liquid cooling components.

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