Battery liquid cooling assembly and battery pack

Abstract

The application provides a battery liquid cooling assembly, which comprises an inflow collector plate, an outflow collector plate, a front end support and a plurality of liquid cooling modules, each two adjacent liquid cooling modules are used for accommodating battery modules, one end of the liquid cooling module is provided with an inflow port and an outflow port, a plurality of first flow guide holes are formed on the inflow collector plate, a plurality of second flow guide holes are formed on the outflow collector plate, the inflow ports of the plurality of liquid cooling modules are sealed and connected with the plurality of first flow guide holes in one-to-one correspondence, and the outflow ports of the plurality of liquid cooling modules are sealed and connected with the plurality of second flow guide holes in one-to-one correspondence; the front end support comprises an upper front end support and a lower front end support, the upper front end support and the lower front end support are detachably fixedly connected, a first accommodating cavity of the upper front end support and a second accommodating cavity of the lower front end support are communicated, and the inflow collector plate and the outflow collector plate are accommodated in the first accommodating cavity and the second accommodating cavity. The application improves the maintenance efficiency of the battery pack and the utilization rate of the battery pack box space. The application further provides a battery pack.

Description

Technical Field

[0001] This invention relates to the field of batteries, and more specifically, to a battery liquid cooling assembly and a battery pack including the battery liquid cooling assembly. Background Technology

[0002] With the development of new energy technologies, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in numerous fields including military equipment and aerospace. As the application areas of power batteries continue to expand, their market demand is also constantly increasing.

[0003] During battery use, the individual battery cells generate heat. Excessive heat can negatively impact battery performance and lifespan. Therefore, effectively dissipating heat from the individual battery cells has become an important research direction in this field.

[0004] Existing battery packs typically employ liquid cooling for heat dissipation. This involves using the vehicle's circulating water system as a cold source, injecting cooling water into the battery pack, and utilizing the flowing cooling water to continuously absorb the heat generated by the battery pack. However, existing solutions usually use a pipe structure for the injection and discharge of cooling water. These pipes occupy a significant amount of space inside the battery pack, reducing the space utilization of the battery pack enclosure, hindering the improvement of energy density, and greatly increasing the difficulty of leak detection and maintenance operations, resulting in low equipment maintenance efficiency.

[0005] For example, patent application CN113782860A discloses a battery pack including battery modules, a thermally conductive adhesive layer, a housing, and multiple liquid cooling plates. The thermally conductive adhesive layer is bonded between the multiple liquid cooling plates and the multiple battery modules. Each liquid cooling plate is used to cool the battery modules bonded and fixed above it through coolant flowing inside. However, each liquid cooling plate has independent inlet and outlet pipe structures on both sides, resulting in a complex internal piping layout and the piping occupying a large amount of space inside the housing, leading to low space utilization and low overall maintenance efficiency of the device.

[0006] Patent application CN111682137A discloses a battery box structure, including a power battery box body, an integrated liquid cooling structure disposed within the power battery box body, and multiple battery cell assemblies disposed within the power battery box body. The integrated liquid cooling structure divides the power battery box body into multiple independent battery housing compartments, and the battery cell assemblies are fixed within the battery housing compartments. However, although this structure can improve the space utilization rate inside the power battery, each current collector of the integrated liquid cooling structure is individually connected to the vehicle cooling circulation system through a liquid cooling pipe fixed in the power battery box body. The liquid cooling pipes are distributed in a dispersed position and are each independently fixed to the inner wall of the battery box body. This not only affects the space utilization rate of the box but also leads to low overall maintenance efficiency of the device.

[0007] Therefore, how to provide a battery liquid cooling component with higher maintenance efficiency has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] The present invention aims to provide a battery liquid cooling assembly and a battery pack including the battery liquid cooling assembly, which can improve the maintenance efficiency of the battery pack.

[0009] To achieve the above objectives, as one aspect of the present invention, a battery liquid cooling assembly is provided, comprising an inlet manifold, an outlet manifold, a front-end support, and a plurality of liquid cooling modules. The plurality of liquid cooling modules are spaced apart along a first direction, and a battery module is accommodated between each pair of adjacent liquid cooling modules. Each liquid cooling module has a flow guiding cavity inside, and one end of each liquid cooling module along a second direction has an inlet and an outlet, the second direction being perpendicular to the first direction. A plurality of first flow guiding holes are formed on the inlet manifold, and a plurality of second flow guiding holes are formed on the outlet manifold. The inlet of each of the plurality of liquid cooling modules is sealed and connected to the plurality of first flow guiding holes on the inlet manifold, and the outlet of each of the plurality of liquid cooling modules is sealed and connected to the plurality of second flow guiding holes on the outlet manifold. The inlet manifold is used to receive coolant and guide the coolant into the flow guiding cavity of the plurality of liquid cooling modules, and the outlet manifold is used to receive the coolant in the flow guiding cavity of the plurality of liquid cooling modules and discharge the coolant.

[0010] The front-end support includes an upper front-end support and a lower front-end support. The upper front-end support has a first receiving cavity inside, and the lower front-end support has a second receiving cavity inside. The bottom of the upper front-end support is detachably fixedly connected to the top of the lower front-end support, and the first receiving cavity communicates with the second receiving cavity. The inlet manifold and the outlet manifold are accommodated in the first receiving cavity and the second receiving cavity. The upper front-end support and the lower front-end support have multiple clearance gaps on the sidewall facing the liquid cooling module. Multiple liquid cooling modules pass through the multiple clearance gaps one by one and are connected to the inlet manifold and the outlet manifold.

[0011] Optionally, the upper front end support includes a top plate, an upper outer side wall, and an upper inner side wall. The upper outer side wall and the upper inner side wall are arranged opposite to each other and the upper outer side wall is located on the side of the upper inner side wall away from the liquid cooling module. The upper outer side wall and the upper inner side wall are connected to each other at both ends along the first direction. The top plate closes the top opening of the space surrounding the upper outer side wall and the upper inner side wall and forms the first receiving cavity.

[0012] The lower front end support includes a base plate, a lower outer side wall and a lower inner side wall. The lower outer side wall and the lower inner side wall are arranged opposite to each other and the lower outer side wall is located on the side of the lower inner side wall away from the liquid cooling module. The lower outer side wall and the lower inner side wall are connected to each other at both ends along the first direction. The base plate closes the bottom opening of the space surrounding the lower outer side wall and the lower inner side wall and forms the second receiving cavity.

[0013] The bottom opening of the upper front end bracket is connected to the top opening of the lower front end bracket. Multiple clearance gaps are formed in both the upper inner sidewall and the lower inner sidewall, and the clearance gaps on the upper inner sidewall and the clearance gaps on the lower inner sidewall are connected in a one-to-one correspondence.

[0014] Optionally, the bottom edge of the upper inner sidewall has at least one first buckle, and the lower inner sidewall has at least one first protrusion on both sides perpendicular to the first direction. The positions of the first protrusions correspond one-to-one with the positions of the first buckles, and the first buckles can engage with the corresponding first protrusions to fix the upper inner sidewall and the lower inner sidewall together; and / or

[0015] The top edge of the lower inner sidewall has at least one second buckle, and the upper inner sidewall has at least one second protrusion on both sides perpendicular to the first direction. The positions of the second protrusions correspond one-to-one with the positions of the second buckles. The second buckles can engage with the corresponding second protrusions to fix the upper inner sidewall and the lower inner sidewall together.

[0016] Optionally, the upper inner sidewall has at least one first upper through hole, and the lower inner sidewall has at least one first lower through hole. Both the first upper through hole and the first lower through hole extend in the direction from the upper front end bracket to the lower front end bracket, and the first upper through hole and the first lower through hole are connected in a one-to-one correspondence. A first bushing coaxial with the corresponding first upper through hole and the first lower through hole is fixedly provided in both the first upper through hole and the first lower through hole. The upper inner sidewall and the lower inner sidewall are fixedly connected by a first fastener passing through the corresponding first bushing.

[0017] Optionally, the first bushing is made of metal.

[0018] Optionally, the liquid cooling module includes a liquid cooling plate, a current collector, and a first plug. The liquid cooling plate has a liquid cooling through hole formed inside. The current collector and the first plug are respectively sealed and connected to both ends of the liquid cooling through hole to form the flow guiding cavity. The inlet and the outlet are formed on the current collector.

[0019] Optionally, the current collector includes a connecting portion and an inlet portion and an outlet portion connected to the connecting portion. The connecting portion has a connecting cavity inside, and one side of the connecting portion has a first connecting opening communicating with the connecting cavity, and the other side of the connecting portion has a pair of second connecting openings communicating with the connecting cavity. An inlet flow hole is formed in the inlet portion, one end of the inlet flow hole communicating with one of the second connecting openings, and the other end of the inlet flow hole forming the inlet of the liquid cooling module. An outlet flow hole is formed in the outlet portion, one end of the outlet flow hole communicating with another of the second connecting openings, and the other end of the outlet flow hole forming the outlet of the liquid cooling module.

[0020] The inlet and outlet portions are spaced apart along a third direction perpendicular to the first and second directions. The inlet portions of the plurality of collectors pass through the clearance gaps on the plurality of upper inner sidewalls and are inserted into the plurality of first guide holes on the inlet collector plate. The outlet portions of the plurality of collectors pass through the clearance gaps on the plurality of lower inner sidewalls and are inserted into the plurality of second guide holes on the outlet collector plate.

[0021] Optionally, the inlet section is welded to the corresponding inlet collector plate; the outlet section is welded to the corresponding outlet collector plate.

[0022] Optionally, the inflow manifold has an inflow guiding hole extending along the first direction, and a pair of second plugs are provided at both ends of the inflow manifold to block the openings of the inflow guiding hole at both ends of the inflow manifold. An inflow connector is also provided on the side of the inflow manifold away from the liquid cooling module. One end of the inflow connector is connected to the inflow guiding hole, and the other end of the inflow connector is used to receive the coolant.

[0023] The outflow manifold has an outflow guiding hole extending along the first direction, and a pair of third plugs are provided at both ends of the outflow manifold to block the openings of the outflow guiding hole at both ends of the outflow manifold. An outflow connector is also provided on the side of the outflow manifold away from the liquid cooling module. One end of the outflow connector is connected to the outflow guiding hole, and the other end of the outflow connector is used to discharge the coolant.

[0024] Optionally, the battery liquid cooling assembly further includes a rear support, which includes an upper rear support and a lower rear support. The lower rear support includes a lower support body and a plurality of receiving portions. The lower support body extends along the first direction, and the plurality of receiving portions are fixedly disposed on the lower support body and spaced apart along the first direction. Receiving grooves are formed in the receiving portions, and the plurality of first plugs are received in the plurality of receiving grooves in a corresponding manner.

[0025] The upper and lower support brackets include an upper support body and multiple filling portions. The upper support body extends along the first direction, and the multiple filling portions are fixedly disposed on the upper support body and spaced apart along the first direction. The upper support body is fixedly connected to the lower support body, and the multiple filling portions are inserted one-to-one between the multiple receiving portions.

[0026] Optionally, the upper and lower support brackets have at least one second upper through hole, and the lower support body has at least one second lower through hole. Both the second upper through hole and the second lower through hole extend in the direction from the upper support body to the lower support body, and the second upper through hole and the second lower through hole are connected in a one-to-one correspondence. A second bushing coaxial with the corresponding second upper through hole and the second lower through hole is fixedly provided in both the second upper through hole and the second lower through hole. The upper support body and the lower support body are fixedly connected by a second fastener passing through the corresponding second bushing.

[0027] Optionally, the second bushing is made of metal.

[0028] As a second aspect of the present invention, a battery pack is provided, including a housing, a plurality of battery modules and the aforementioned battery liquid cooling assembly, wherein the battery liquid cooling assembly and the plurality of battery modules are all disposed in the housing, and the plurality of battery modules are accommodated between the plurality of liquid cooling modules.

[0029] In the battery liquid cooling assembly and battery pack provided by this invention, a liquid cooling module is stacked between every two adjacent battery modules. Multiple liquid cooling modules each have an inlet for injecting coolant into the flow channel of the liquid cooling module and an outlet for discharging coolant on the same side. The inlets and outlets of the multiple liquid cooling modules are respectively connected to an inlet manifold and an outlet manifold located on the same side of the liquid cooling modules. This allows for the introduction and discharge of coolant on the same side outside the battery modules, eliminating the need for complex piping structures between battery modules, reducing the difficulty of leak detection and maintenance, and improving the maintenance efficiency of the battery pack. Furthermore, it simplifies the battery pack structure, improves assembly efficiency and structural strength, and increases the utilization rate of the battery pack housing space, thereby ensuring the energy density of the battery pack.

[0030] Furthermore, the front-end support includes an upper front-end support and a lower front-end support, both of which are semi-enclosed structures. These two supports interlock to form the front-end support, enclosing the inlet and outlet current collectors. This protects the inlet and outlet current collectors from impacts and, by avoiding gaps, coordinates with multiple liquid cooling modules to fix the relative positions of the liquid cooling modules and battery modules. The front-end support can also be fixedly connected to the battery pack housing to secure the battery cooling components within the housing. In addition, when leakage occurs in the cooling system, the entire structure, including the inlet and outlet current collectors, can be removed from the housing simply by removing the front-end support. Furthermore, by disassembling the upper and lower front-end supports, the connections between the inlet and outlet current collectors and each liquid cooling module are fully exposed, ensuring convenient maintenance of the battery liquid cooling components. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of the battery liquid cooling assembly provided in an embodiment of the present invention;

[0033] Figure 2 This is an exploded view of the battery liquid cooling assembly provided in an embodiment of the present invention;

[0034] Figure 3This is a schematic diagram of the battery liquid cooling assembly provided in an embodiment of the present invention without the front and rear support brackets installed;

[0035] Figure 4 This is a schematic diagram of the current collector structure in the battery liquid cooling assembly provided in this embodiment of the invention;

[0036] Figure 5 This is a schematic diagram showing the connection relationship between the liquid cooling module, the inflow collector plate, and the outflow collector plate in the battery liquid cooling assembly provided in this embodiment of the invention.

[0037] Figure 6 This is a schematic diagram illustrating the principle of coolant flow in the liquid cooling plate in the battery liquid cooling assembly provided in this embodiment of the invention;

[0038] Figure 7 This is a schematic diagram of the upper front support and lower front support of the battery liquid cooling assembly provided in the embodiment of the present invention in the disassembled state;

[0039] Figure 8 yes Figure 7 A magnified view of a portion of region A in the middle;

[0040] Figure 9 This is a top view of the lower front end support structure of the battery liquid cooling assembly provided in this embodiment of the invention;

[0041] Figure 10 yes Figure 9 A magnified view of a portion of region B in the middle;

[0042] Figure 11 This is a cross-sectional schematic diagram of the battery liquid cooling assembly provided in an embodiment of the present invention;

[0043] Figure 12 This is a partial structural schematic diagram of the inflow collector plate in the battery liquid cooling assembly provided in this embodiment of the invention;

[0044] Figure 13 This is a partial structural schematic diagram of the outflow collector plate in the battery liquid cooling assembly provided in this embodiment of the invention;

[0045] Figure 14 This is an exploded view of the structure of the rear support bracket in the battery liquid cooling assembly provided in this embodiment of the invention;

[0046] Figure 15 This is a schematic diagram of the structure of the rear support in the battery liquid cooling assembly provided in an embodiment of the present invention.

[0047] Explanation of reference numerals in the attached figures:

[0048] 110: Inlet manifold; 111: First guide hole

[0049] 112: Second plug; 113: Inlet connector

[0050] 120: Outflow collector plate; 121: Second flow guide hole

[0051] 122: Third plug; 123: Outflow connector

[0052] 200: Battery module; 300: Liquid cooling module

[0053] 310: Liquid cooling plate; 320: Current collector

[0054] 321: Connecting part; 322: Inlet part

[0055] 323: Outflow section; 330: First plug

[0056] 400: Upper front support; 410: Top plate

[0057] 420: Superior lateral wall; 430: Superior medial wall

[0058] 431: First buckle; 432: Second protrusion

[0059] 500: Lower front support; 510: Base plate

[0060] 520: Inferior lateral wall; 530: Inferior medial wall

[0061] 531: First protrusion; 532: Second buckle

[0062] 610: Avoidance gap 620: First bushing

[0063] 630: First fastener; 640: Reinforcing rib

[0064] 700: Upper rear end bracket; 710: Upper bracket body

[0065] 711: Top extension strip; 712: Side panel

[0066] 720: Filling section; 800: Lower rear support.

[0067] 810: Lower support body 820: Receiving part

[0068] 821: Receiving groove; 910: Second bushing

[0069] 920: Second fastener Detailed Implementation

[0070] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0071] To address the aforementioned technical problems, as one aspect of the present invention, a battery liquid cooling assembly is provided, such as... Figures 1 to 3 As shown, the battery liquid cooling assembly includes an inlet manifold 110, an outlet manifold 120, a front-end support (including an upper front-end support 400 and a lower front-end support 500), and multiple liquid cooling modules 300. The multiple liquid cooling modules 300 are spaced apart along a first direction (i.e., direction a in the figure), and each pair of adjacent liquid cooling modules 300 is used to accommodate a battery module 200 (the figure shows the state with battery modules 200 installed). Each liquid cooling module 300 has a flow guiding cavity inside, and one end of each liquid cooling module 300 along a second direction (i.e., direction b in the figure) has an inlet and an outlet. The second direction is perpendicular to the first direction. The inlet manifold 110 has a... The liquid cooling modules 300 have multiple first guide holes 111 and multiple second guide holes 121 formed on the outflow collector plate 120. The inlet ports of the multiple liquid cooling modules 300 are sealed and connected one-to-one with the multiple first guide holes 111 on the inlet collector plate 110, and the outlet ports of the multiple liquid cooling modules 300 are sealed and connected one-to-one with the multiple second guide holes 121 on the outflow collector plate 120. The inlet collector plate 110 is used to receive coolant and guide the coolant into the guide cavities of the multiple liquid cooling modules 300. The outflow collector plate 120 is used to receive the coolant in the guide cavities of the multiple liquid cooling modules 300 and export the coolant.

[0072] The front-end support includes an upper front-end support 400 and a lower front-end support 500. The upper front-end support 400 has a first receiving cavity inside, and the lower front-end support 500 has a second receiving cavity inside. The bottom of the upper front-end support 400 and the top of the lower front-end support 500 are detachably fixedly connected, and the first receiving cavity communicates with the second receiving cavity. The inlet manifold 110 and the outlet manifold 120 are accommodated in the first receiving cavity and the second receiving cavity, respectively. The upper front-end support 400 and the lower front-end support 500 have multiple clearance gaps 610 on the sidewall facing the liquid cooling module 300. Multiple liquid cooling modules pass through the multiple clearance gaps 610 one by one and are connected to the inlet manifold 110 and the outlet manifold 120.

[0073] It should be noted that the battery liquid cooling assembly can be used to assemble a battery pack. Specifically, after the battery module 200 is set, the inflow current collector 110 and the outflow current collector 120 are fixedly connected to each battery module 200 through the liquid cooling module 300. At this time, the inflow current collector 110 and the outflow current collector 120 are fixedly connected to the housing through the front bracket, so that the position of the battery module 200 in the housing (not shown in the figure) can be fixed, that is, a battery pack including multiple battery modules 200 is assembled.

[0074] In the battery liquid cooling assembly provided by this invention, a liquid cooling module 300 is stacked between every two adjacent battery modules 200. Multiple liquid cooling modules 300 each have an inlet for injecting coolant into the flow channel of the liquid cooling module 300 and an outlet for discharging coolant on the same side. The inlets and outlets of the multiple liquid cooling modules 300 are respectively connected to an inlet manifold 110 and an outlet manifold 120 located on the same side of the liquid cooling modules 300. This allows for the introduction and export of coolant on the same side outside the battery modules 200, eliminating the need for complex piping structures between the battery modules 200, reducing the difficulty of leak detection and maintenance, and improving the maintenance efficiency of the battery pack. Furthermore, it simplifies the battery pack structure, improves assembly efficiency and structural strength, and increases the utilization rate of the battery pack housing space, thereby ensuring the energy density of the battery pack.

[0075] Furthermore, the front-end bracket includes an upper front-end bracket 400 and a lower front-end bracket 500. Both the upper front-end bracket 400 and the lower front-end bracket 500 are semi-enclosed structures, and they are interlocked to form the front-end bracket, which encloses the inflow collector plate 110 and the outflow collector plate 120. This protects the inflow collector plate 110 and the outflow collector plate 120 from collisions, while also cooperating with multiple liquid cooling modules 300 through the clearance gap 610 to fix the relative positions of the multiple liquid cooling modules 300 and the battery module 200. The front-end bracket can also be fixedly connected to the battery pack housing to fix the position of the battery cooling components in the housing. Furthermore, when problems such as leakage occur in the cooling system, the entire structure, including the inlet current collector 110 and the outlet current collector 120, can be removed from the housing simply by removing the front-end bracket. Moreover, by simply disassembling the upper front-end bracket 400 and the lower front-end bracket 500, the connection points between the inlet current collector 110 and the outlet current collector 120 and each liquid cooling module 300 can be completely exposed, ensuring the convenience of maintaining the battery liquid cooling components.

[0076] As an optional embodiment of the present invention, such as Figure 7 , Figure 8 As shown, the upper front support 400 includes a top plate 410, an upper outer side wall 420, and an upper inner side wall 430. The upper outer side wall 420 and the upper inner side wall 430 are arranged opposite to each other and the upper outer side wall 420 is located on the side of the upper inner side wall 430 away from the liquid cooling module 300. The upper outer side wall 420 and the upper inner side wall 430 are connected to each other at both ends along the first direction. The top plate 410 closes the top opening of the space surrounding the upper outer side wall 420 and the upper inner side wall 430 and forms the first receiving cavity.

[0077] The lower front end support 500 includes a base plate 510, a lower outer side wall 520, and a lower inner side wall 530. The lower outer side wall 520 and the lower inner side wall 530 are arranged opposite to each other, and the lower outer side wall 520 is located on the side of the lower inner side wall 530 away from the liquid cooling module 300. The lower outer side wall 520 and the lower inner side wall 530 are connected to each other at both ends along the first direction. The base plate 510 closes the bottom opening of the space surrounding the lower outer side wall 520 and the lower inner side wall 530 and forms the second receiving cavity.

[0078] The bottom opening of the upper front end bracket 400 is connected to the top opening of the lower front end bracket 500. Multiple clearance gaps 610 are formed in both the upper inner side wall 430 and the lower inner side wall 530, and the clearance gaps 610 on the upper inner side wall 430 and the clearance gaps 610 on the lower inner side wall 530 are connected in a one-to-one correspondence.

[0079] As an optional embodiment of the present invention, the upper front end bracket 400 and the lower front end bracket 500 can be connected to each other via a snap-fit ​​structure, specifically, as shown in the example below. Figures 7 to 10 As shown, the bottom edge of the upper inner sidewall 430 has at least one first buckle 431, and the lower inner sidewall 530 has at least one first protrusion 531 on both sides perpendicular to the first direction. The positions of the first protrusions 531 correspond one-to-one with the positions of the first buckles 431. The first buckles 431 can engage with the corresponding first protrusions 531 to fix the upper inner sidewall 430 and the lower inner sidewall 530 together; and / or

[0080] The top edge of the lower inner sidewall 530 has at least one second buckle 532, and the upper inner sidewall 430 has at least one second protrusion 432 on both sides perpendicular to the first direction. The positions of the second protrusions 432 correspond one-to-one with the positions of the second buckles 532. The second buckles 532 can engage with the corresponding second protrusions 432 to fix the upper inner sidewall 430 and the lower inner sidewall 530 together.

[0081] As an optional embodiment of the present invention, such as Figures 7 to 10As shown, the upper inner sidewall 430 has multiple pairs of first buckles 431 and multiple pairs of second protrusions 432, and there is a pair of second protrusions 432 between two adjacent pairs of first buckles 431, and a pair of first buckles 431 between two adjacent pairs of second protrusions 432. There is an avoidance gap 610 between each pair of first buckles 431 and the adjacent second protrusion 432. The lower inner sidewall 530 has multiple pairs of first protrusions 531 and multiple pairs of second buckles 532, and there is a pair of second buckles 532 between two adjacent pairs of first protrusions 531, and a pair of first protrusions 5311 between two adjacent pairs of second buckles 532. There is an avoidance gap 610 between each pair of first protrusions 531 and the adjacent second buckle 532.

[0082] To improve the stability of the front-end support structure, as a preferred embodiment of the present invention, such as... Figures 8 to 10 As shown, the upper inner sidewall 430 has at least one first upper through hole, and the lower inner sidewall 530 has at least one first lower through hole. Both the first upper through hole and the first lower through hole extend in the direction from the upper front end bracket 400 to the lower front end bracket 500, and the first upper through hole and the first lower through hole are connected in a one-to-one correspondence. A first bushing 620 coaxial with the corresponding first upper through hole and the first lower through hole is fixedly provided in both the first upper through hole and the first lower through hole. The upper inner sidewall 430 and the lower inner sidewall 530 are fixedly connected by a first fastener 630 passing through the corresponding first bushing 620.

[0083] It should be noted that the material strength of the first bushing 620 should be greater than that of the upper front support 400 and the lower front support 500 to ensure the structural strength of the connection between the upper front support 400 and the lower front support 500. For example, as an optional embodiment of the present invention, the first bushing 620 is made of metal.

[0084] As an optional embodiment of the present invention, the first fastener 630 can be a screw. In this embodiment, the upper front-end bracket 400 and the lower front-end bracket 500 can be made of low-strength materials such as plastic. The fastening parts are reinforced by a first bushing 620 made of metal, and the two are fastened together by the first fastener 630 passing through the first bushing 620 in the first upper through hole and the first lower through hole, thereby improving the overall stability of the front-end bracket structure.

[0085] As a preferred embodiment of the present invention, such as Figure 10As shown, the upper inner wall 430 and the lower inner wall 530 (the figure shows the case of the upper inner wall 430, and the case of the lower inner wall 530 is similar) can be hollow structures, and the part where the first bushing 620 is provided is reinforced by reinforcing ribs 640, thereby reducing the material cost of the upper front support 400 and the lower front support 500 while ensuring the structural strength of the fastening position of the upper front support 400 and the lower front support 500.

[0086] To facilitate fixing the battery cooling assembly in the battery pack housing, in a preferred embodiment of the present invention, the bottom end of the first fastener 630 may extend beyond the bottom of the lower front bracket 500 so as to connect with the threaded hole in the housing, thereby directly fixing the front bracket in the housing through the first fastener 630.

[0087] As an optional embodiment of the present invention, such as Figure 2 , Figure 3 As shown, the liquid cooling module 300 includes a liquid cooling plate 310, a current collector 320, and a first plug 330. The liquid cooling plate 310 has a liquid cooling through hole formed inside. The current collector 320 and the first plug 330 are respectively sealed and connected to the two ends of the liquid cooling through hole to form the flow guiding cavity. The inlet and the outlet are formed on the current collector 320.

[0088] As an optional embodiment of the present invention, such as Figure 4 As shown, the current collector 320 includes a connecting portion 321 and an inlet portion 322 and an outlet portion 323 connected to the connecting portion 321. The connecting portion 321 has a connecting cavity inside, and one side of the connecting portion 321 has a first connecting opening communicating with the connecting cavity, and the other side of the connecting portion 321 has a pair of second connecting openings communicating with the connecting cavity. An inlet flow hole is formed in the inlet portion 322, one end of the inlet flow hole communicating with one of the second connecting openings, and the other end of the inlet flow hole forming the inlet of the liquid cooling module 300. An outlet flow hole is formed in the outlet portion 323, one end of the outlet flow hole communicating with another of the second connecting openings, and the other end of the outlet flow hole forming the outlet of the liquid cooling module 300.

[0089] like Figure 5As shown, the inlet portion 322 and the outlet portion 323 are spaced apart along a third direction perpendicular to the first direction and the second direction (i.e., direction c in the figure). The inlet portions 322 of the plurality of collectors 320 pass through the clearance gaps 610 on the plurality of upper inner sidewalls 430 and are inserted into the plurality of first guide holes 111 on the inlet collector plate 110. The outlet portions 323 of the plurality of collectors pass through the clearance gaps 610 on the plurality of lower inner sidewalls 530 and are inserted into the plurality of second guide holes 121 on the outlet collector plate 120.

[0090] Specifically, such as Figure 5 , Figure 11 As shown, the inlet portion 322 of the current collector 320 of each liquid cooling module 300 is inserted into the inlet current collector plate 110, and the outlet portion 323 of the current collector 320 of each liquid cooling module 300 is inserted into the outlet current collector plate 120. Thus, coolant is injected into the guide cavity (liquid cooling through hole) of multiple liquid cooling plates 310 through the inlet current collector plate 110, and the coolant after heat exchange is received through the outlet current collector plate 120, thereby realizing the circulation of coolant.

[0091] like Figure 6 As shown, the coolant flows into the collector 320 from the inlet 322 and then into the collector plate 110. It then flows horizontally to the other end of the collector plate 110, turns back and flows back to the collector 320, and finally flows out from the outlet 323. The coolant flows in the collector plate 110 along the "U" shaped path shown by the arrow, and exchanges heat with the battery modules 200 on both sides (or one side) of the collector plate 110 in real time during the flow process, so as to cool down the battery modules 200.

[0092] The inventors of this invention also discovered during their research that most existing liquid cooling structures use quick-connect connections. A single liquid cooling system may have dozens or even hundreds of quick-connects, each of which represents a potential leakage point, posing a significant safety hazard to the entire battery system. Furthermore, quick-connect connections drastically reduce assembly efficiency and increase inspection costs. In addition, the main reason for the safety hazards associated with using quick-connect structures to connect liquid cooling plates is that the quick-connects require a tight seal at the interface. Therefore, rubber materials are generally used for elastic sealing at the connection points. However, all rubber materials are susceptible to aging and corrosion. Once the sealing ring fails, the entire liquid cooling system will be at risk of leakage. Moreover, the dozens of quick-connect points require manual installation, significantly reducing production efficiency.

[0093] To solve the above-mentioned technical problems, in a preferred embodiment of the present invention, the inlet portion 322 is welded to the corresponding inlet collector plate 110; and the outlet portion 323 is welded to the corresponding outlet collector plate 120.

[0094] In this embodiment of the invention, the inlet portion 322 of the current collector 320 is welded to the corresponding inlet current collector plate 110, and the outlet portion 323 of the current collector 320 is welded to the corresponding outlet current collector plate 120, thereby welding the inlet current collector plate 110 and the outlet current collector plate 120 to multiple liquid cooling modules 300 into one unit, avoiding the leakage risk caused by poor sealing at the connection, improving the safety of the battery liquid cooling assembly, and reducing the production cost of the battery liquid cooling assembly.

[0095] In an optional embodiment of the present invention, both the liquid cooling plate 310 and the current collector 320 are made of metal, and the liquid cooling plate 310 and the current collector 320 are welded together.

[0096] As an optional embodiment of the present invention, the first plug 330 is made of metal, and the liquid cooling plate 310 is welded to the first plug 330.

[0097] In an optional embodiment of the present invention, the cross-sections of the liquid cooling plate 310 and the liquid cooling through hole along the direction from the current collector 320 to the first plug 330 are both rectangular. That is, in this embodiment of the present invention, the liquid cooling plate 310 can be a rectangular tube, and the liquid cooling through hole is a rectangular hole in the rectangular tube. By welding and sealing the two ends of the rectangular tube with the first plug 330 and the current collector 320 respectively, a sealed flow guiding cavity can be formed.

[0098] As an optional embodiment of the present invention, such as Figure 12 As shown, the inflow collector plate 110 has an inflow guiding hole extending along the first direction, and a pair of second plugs 112 are provided at both ends of the inflow collector plate 110 to block the openings of the inflow guiding hole at both ends of the inflow collector plate 110, as shown. Figure 3 , Figure 11 As shown, the inlet manifold 110 is also provided with an inlet connector 113 on the side opposite to the liquid cooling module 300. One end of the inlet connector 113 is connected to the inlet guide hole, and the other end of the inlet connector 113 is used to receive the coolant (connected to the cold source).

[0099] like Figure 13 As shown, the outflow collector plate 120 has an outflow guiding hole extending along the first direction, and a pair of third plugs 122 are provided at both ends of the outflow collector plate 120 to block the openings of the outflow guiding hole at both ends of the outflow collector plate 120, as shown. Figure 3 , Figure 11As shown, the outflow manifold 120 is also provided with an outflow connector 123 on the side opposite to the liquid cooling module 300. One end of the outflow connector 123 is connected to the outflow guide hole, and the other end of the outflow connector 123 is used to (connect to the cold source) export the coolant.

[0100] As an optional embodiment of the present invention, the inlet manifold 110 and the outlet manifold 120 can be rectangular tubes. By sealing the two ends of the two rectangular tubes with the second plug 112 and the third plug 122 respectively, the inlet manifold 110 and the outlet manifold 120 with both ends sealed can be obtained.

[0101] In one optional embodiment of the present invention, the second plug 112 is made of metal, and the inlet manifold 110 is welded to the second plug 112; the third plug 122 is made of metal, and the outlet manifold 120 is welded to the third plug 122.

[0102] To improve the stability of the battery cooling component structure and further ensure the stability of the battery cooling component's position within the battery pack housing, as a preferred embodiment of the present invention, such as... Figure 1 , Figure 2 As shown, the battery liquid cooling assembly also includes a rear-end support, which comprises an upper rear-end support 700 and a lower rear-end support 800, as... Figure 14 , Figure 15 As shown, the lower rear support 800 includes a lower support body 810 and a plurality of receiving portions 820. The lower support body 810 extends along the first direction, and the plurality of receiving portions 820 are fixedly disposed on the lower support body 810 and spaced apart along the first direction. Receiving grooves 821 are formed in the receiving portions 820, and the plurality of first plugs 330 are correspondingly received in the plurality of receiving grooves 821.

[0103] The upper and lower end brackets 700 include an upper bracket body 710 and a plurality of filling portions 720. The upper bracket body 710 extends along the first direction, and the plurality of filling portions 720 are fixedly disposed on the upper bracket body 710 and spaced apart along the first direction. The upper bracket body 710 is fixedly connected to the lower bracket body 810, and the plurality of filling portions 720 are inserted one-to-one between the plurality of receiving portions 820.

[0104] In this embodiment of the invention, the battery liquid cooling assembly further includes a rear-end support, which includes an upper rear-end support 700 and a lower rear-end support 800. The lower rear-end support 800 has a receiving groove 821 formed in its receiving portion 820, which receives a plurality of first plugs 330 in a corresponding manner. The multiple filling portions 720 of the upper rear-end support 700 are inserted into the gaps between the receiving portions 820 in a corresponding manner, thereby fixing the position of the receiving portion 820. The filling portions 720 on both sides of each receiving portion 820 apply a pre-tightening force to the middle receiving portion 820, so as to clamp the first plugs 330 contained therein. This achieves the fixation of the plurality of liquid cooling modules 300 at one end of the first plugs 330, further improving the stability of the battery cooling assembly structure. The rear-end support can also be used to fix the battery pack housing, further ensuring the stability of the position of the battery cooling assembly in the battery pack housing.

[0105] To improve the stability of the rear support structure, as a preferred embodiment of the present invention, such as... Figure 14 , Figure 15 As shown, the upper and lower support brackets 700 have at least one second upper through hole, and the lower support body 810 has at least one second lower through hole. Both the second upper through hole and the second lower through hole extend in the direction from the upper support body 710 to the lower support body 810, and the second upper through hole and the second lower through hole are connected in a one-to-one correspondence. A second bushing 910 coaxial with the corresponding second upper through hole and the second lower through hole is fixedly provided in both the second upper through hole and the second lower through hole. The upper support body 710 and the lower support body 810 are fixedly connected by a second fastener 920 passing through the corresponding second bushing 910.

[0106] It should be noted that the material strength of the second bushing 910 should be greater than that of the upper rear end bracket 700 and the lower rear end bracket 800 to ensure the structural strength of the connection between the upper rear end bracket 700 and the lower rear end bracket 800. For example, as an optional embodiment of the present invention, the second bushing 910 is made of metal.

[0107] As an optional embodiment of the present invention, the second fastener 920 can be a screw. In this embodiment, the upper rear end bracket 700 and the lower rear end bracket 800 can be made of low-strength materials such as plastic. The fastening parts are reinforced by a second bushing 910 made of metal, and the two are fastened together by the second fastener 920 passing through the second bushing 910 in the second upper through hole and the second lower through hole, thereby improving the overall stability of the rear end bracket structure.

[0108] To facilitate fixing the battery cooling assembly in the battery pack housing, in a preferred embodiment of the present invention, the bottom end of the second fastener 920 may extend beyond the bottom of the lower rear support 800 so as to connect with the threaded hole in the housing, thereby directly fixing the rear support in the housing through the second fastener 920.

[0109] As an optional embodiment of the present invention, such as Figure 14 As shown, at least a portion of the filling portion 720 corresponds to the position of the second upper through hole, and the second upper through hole penetrates the upper support body 710 and the corresponding filling portion 720.

[0110] As an optional embodiment of the present invention, such as Figure 14 As shown, the upper support body 710 includes a top extension strip 711 and a side plate 712. The top extension strip 711 extends along the first direction. A plurality of the receiving portions 820 are fixedly disposed at the bottom of the top extension strip 711. The top of the side plate 712 is fixedly connected to the top extension strip 711, and the side plate 712 covers the lower rear support 800 and the side of the plurality of receiving portions 820 facing away from the liquid cooling module 300.

[0111] As a second aspect of the present invention, a battery pack is provided, including a housing, a plurality of battery modules 200 and a battery liquid cooling assembly provided in the embodiments of the present invention, wherein the battery liquid cooling assembly and the plurality of battery modules 200 are all disposed in the housing, and the plurality of battery modules 200 are accommodated between the plurality of liquid cooling modules.

[0112] In the battery pack provided by this invention, a liquid cooling module 300 is stacked between every two adjacent battery modules 200. Multiple liquid cooling modules 300 each have an inlet for injecting coolant into the flow channel of the liquid cooling module 300 and an outlet for discharging coolant on the same side. The inlets and outlets of the multiple liquid cooling modules 300 are respectively connected to an inlet manifold 110 and an outlet manifold 120 located on the same side of the liquid cooling modules 300. This allows for the introduction and export of coolant on the same side outside the battery modules 200, eliminating the need for complex piping structures between the battery modules 200, reducing the difficulty of leak detection and maintenance, and improving the maintenance efficiency of the battery pack. Furthermore, it simplifies the battery pack structure, improves assembly efficiency and structural strength, and increases the utilization rate of the battery pack housing space, thereby ensuring the energy density of the battery pack.

[0113] Furthermore, the front-end bracket includes an upper front-end bracket 400 and a lower front-end bracket 500. Both the upper front-end bracket 400 and the lower front-end bracket 500 are semi-enclosed structures, and they are interlocked to form the front-end bracket, which encloses the inflow collector plate 110 and the outflow collector plate 120. This protects the inflow collector plate 110 and the outflow collector plate 120 from collisions, while also cooperating with multiple liquid cooling modules 300 through the clearance gap 610 to fix the relative positions of the multiple liquid cooling modules 300 and the battery module 200. The front-end bracket can also be fixedly connected to the battery pack housing to fix the position of the battery cooling components in the housing. Furthermore, when problems such as leakage occur in the cooling system, the entire structure, including the inlet current collector 110 and the outlet current collector 120, can be removed from the housing simply by removing the front-end bracket. Moreover, by simply disassembling the upper front-end bracket 400 and the lower front-end bracket 500, the connection points between the inlet current collector 110 and the outlet current collector 120 and each liquid cooling module 300 can be completely exposed, ensuring the convenience of maintaining the battery liquid cooling components.

[0114] As an optional embodiment of the present invention, such as Figure 2 , Figure 7 As shown, the upper inner sidewall 430 has multiple first upper through holes, and the lower inner sidewall 530 has multiple first lower through holes. Both the first upper through holes and the first lower through holes extend in the direction from the upper front end bracket 400 to the lower front end bracket 500, and the multiple first upper through holes and the multiple first lower through holes are connected in a one-to-one correspondence. A first bushing 620 coaxial with the corresponding first upper through hole and the first lower through hole is fixedly provided in each of the first upper through hole and the first lower through hole. The inner wall of the box has multiple first mounting holes (the box is not shown in the figure). The upper inner sidewall 430 and the lower inner sidewall 530 are fixed in the box by first fasteners 630 passing through the corresponding first bushings 620 and the first mounting holes. The first bushings 620 are made of metal.

[0115] As an optional embodiment of the present invention, the first fastener 630 is a screw, and the first mounting hole is a threaded hole.

[0116] As an optional embodiment of the present invention, such as Figure 14 , Figure 15As shown, the upper and lower support brackets 700 have multiple second upper through holes, and the lower support body 810 has multiple second lower through holes. Both the second upper through holes and the second lower through holes extend from the upper support body 710 to the lower support body 810, and the multiple second upper through holes and the multiple second lower through holes are connected in a one-to-one correspondence. A second bushing 910 coaxial with the corresponding second upper through hole and the second lower through hole is fixedly provided in each of the second upper through hole and the second lower through hole. The inner wall of the housing has multiple second mounting holes (the housing is not shown in the figure). The upper support body 710 and the lower support body 810 are fixed in the housing by second fasteners 920 passing through the corresponding second bushings 910 and the second mounting holes. The second bushings 910 are made of metal.

[0117] As an optional embodiment of the present invention, the second fastener 920 is a screw, and the second mounting hole is a threaded hole.

[0118] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A battery liquid cooling assembly, characterized in that, The device includes an inlet manifold, an outlet manifold, a front-end bracket, and multiple liquid cooling modules. The multiple liquid cooling modules are spaced apart along a first direction, and each pair of adjacent liquid cooling modules is used to accommodate a battery module. Each liquid cooling module has a flow guiding cavity inside, and one end of each liquid cooling module along a second direction has an inlet and an outlet. The second direction is perpendicular to the first direction. Multiple first flow guiding holes are formed on the inlet manifold, and multiple second flow guiding holes are formed on the outlet manifold. The inlets of the multiple liquid cooling modules are sealed and connected one-to-one with the multiple first flow guiding holes on the inlet manifold, and the outlets of the multiple liquid cooling modules are sealed and connected one-to-one with the multiple second flow guiding holes on the outlet manifold. The inlet manifold is used to receive coolant and guide the coolant into the flow guide cavities of the multiple liquid cooling modules; the outlet manifold is used to receive the coolant in the flow guide cavities of the multiple liquid cooling modules and discharge the coolant. The front-end support includes an upper front-end support and a lower front-end support. The upper front-end support has a first receiving cavity inside, and the lower front-end support has a second receiving cavity inside. The bottom of the upper front-end support is detachably fixedly connected to the top of the lower front-end support, and the first receiving cavity communicates with the second receiving cavity. The inlet manifold and the outlet manifold are received in the first receiving cavity and the second receiving cavity. The upper front-end support and the lower front-end support have multiple clearance gaps on the sidewall facing the liquid cooling module. Multiple liquid cooling modules pass through the multiple clearance gaps one by one and are connected to the inlet manifold and the outlet manifold. The liquid cooling module includes a liquid cooling plate and a current collector. The liquid cooling plate has a liquid cooling through hole inside, and the current collector is sealed to one end of the liquid cooling through hole to form the flow guiding cavity. The current collector includes a connecting part and an inlet part and an outlet part connected to the connecting part. An inlet flow hole is formed in the inlet part, and the other end of the inlet flow hole is formed as the inlet of the liquid cooling module. An outlet flow hole is formed in the outlet part, and the other end of the outlet flow hole is formed as the outlet of the liquid cooling module. The inlet section is welded to the corresponding inlet collector plate; the outlet section is welded to the corresponding outlet collector plate.

2. The battery liquid cooling assembly according to claim 1, characterized in that, The upper front end support includes a top plate, an upper outer side wall and an upper inner side wall. The upper outer side wall and the upper inner side wall are arranged opposite to each other and the upper outer side wall is located on the side of the upper inner side wall away from the liquid cooling module. The upper outer side wall and the upper inner side wall are connected to each other at both ends along the first direction. The top plate closes the top opening of the space surrounding the upper outer side wall and the upper inner side wall and forms the first receiving cavity. The lower front end support includes a base plate, a lower outer side wall and a lower inner side wall. The lower outer side wall and the lower inner side wall are arranged opposite to each other and the lower outer side wall is located on the side of the lower inner side wall away from the liquid cooling module. The lower outer side wall and the lower inner side wall are connected to each other at both ends along the first direction. The base plate closes the bottom opening of the space surrounding the lower outer side wall and the lower inner side wall and forms the second receiving cavity. The bottom opening of the upper front end bracket is connected to the top opening of the lower front end bracket. Multiple clearance gaps are formed in both the upper inner sidewall and the lower inner sidewall, and the clearance gaps on the upper inner sidewall and the clearance gaps on the lower inner sidewall are connected in a one-to-one correspondence.

3. The battery liquid cooling assembly according to claim 2, characterized in that, The bottom edge of the upper inner sidewall has at least one first buckle, and the lower inner sidewall has at least one first protrusion on both sides perpendicular to the first direction. The positions of the first protrusions correspond one-to-one with the positions of the first buckles, and the first buckles can engage with the corresponding first protrusions to fix the upper inner sidewall and the lower inner sidewall together; and / or The top edge of the lower inner sidewall has at least one second buckle, and the upper inner sidewall has at least one second protrusion on both sides perpendicular to the first direction. The positions of the second protrusions correspond one-to-one with the positions of the second buckles. The second buckles can engage with the corresponding second protrusions to fix the upper inner sidewall and the lower inner sidewall together.

4. The battery liquid cooling assembly according to claim 3, characterized in that, The upper inner sidewall has at least one first upper through hole, and the lower inner sidewall has at least one first lower through hole. Both the first upper through hole and the first lower through hole extend in the direction from the upper front end bracket to the lower front end bracket, and the first upper through hole and the first lower through hole are connected in a one-to-one correspondence. A first bushing coaxial with the corresponding first upper through hole and the first lower through hole is fixedly provided in both the first upper through hole and the first lower through hole. The upper inner sidewall and the lower inner sidewall are fixedly connected by a first fastener passing through the corresponding first bushing.

5. The battery liquid cooling assembly according to claim 4, characterized in that, The first bushing is made of metal.

6. The battery liquid cooling assembly according to any one of claims 2 to 5, characterized in that, The liquid cooling module also includes a first plug, the current collector and the first plug are respectively sealed and connected to both ends of the liquid cooling through hole, and the inlet and the outlet are formed on the current collector.

7. The battery liquid cooling assembly according to claim 6, characterized in that, The connecting part has a connecting cavity inside, and one side of the connecting part has a first connecting opening communicating with the connecting cavity, and the other side of the connecting part has a pair of second connecting openings communicating with the connecting cavity; one end of the inlet flow hole communicates with one of the second connecting openings, and one end of the outlet flow hole communicates with another second connecting opening; the inlet part and the outlet part are spaced along a third direction perpendicular to the first direction and the second direction, and the inlet parts of the plurality of collectors pass through the clearance gaps on the plurality of upper inner sidewalls and are inserted into the plurality of first guide holes on the inlet collector plate in a corresponding manner, and the outlet parts of the plurality of collectors pass through the clearance gaps on the plurality of lower inner sidewalls and are inserted into the plurality of second guide holes on the outlet collector plate in a corresponding manner.

8. The battery liquid cooling assembly according to claim 1, characterized in that, The inlet manifold has an inlet guide hole extending along the first direction, and a pair of second plugs are provided at both ends of the inlet manifold to block the openings of the inlet guide hole at both ends of the inlet manifold. An inlet connector is also provided on the side of the inlet manifold away from the liquid cooling module. One end of the inlet connector is connected to the inlet guide hole, and the other end of the inlet connector is used to receive the coolant. The outflow manifold has an outflow guiding hole extending along the first direction, and a pair of third plugs are provided at both ends of the outflow manifold to block the openings of the outflow guiding hole at both ends of the outflow manifold. An outflow connector is also provided on the side of the outflow manifold away from the liquid cooling module. One end of the outflow connector is connected to the outflow guiding hole, and the other end of the outflow connector is used to discharge the coolant.

9. The battery liquid cooling assembly according to claim 6, characterized in that, The battery liquid cooling assembly also includes a rear support, which includes an upper rear support and a lower rear support. The lower rear support includes a lower support body and a plurality of receiving portions. The lower support body extends along the first direction, and the plurality of receiving portions are fixedly disposed on the lower support body and spaced apart along the first direction. Receiving grooves are formed in the receiving portions, and the plurality of first plugs are received in the plurality of receiving grooves in a corresponding manner. The upper and lower support brackets include an upper support body and multiple filling portions. The upper support body extends along the first direction, and the multiple filling portions are fixedly disposed on the upper support body and spaced apart along the first direction. The upper support body is fixedly connected to the lower support body, and the multiple filling portions are inserted one-to-one between the multiple receiving portions.

10. The battery liquid cooling assembly according to claim 9, characterized in that, The upper and lower support brackets have at least one second upper through hole, and the lower support body has at least one second lower through hole. Both the second upper through hole and the second lower through hole extend in the direction from the upper support body to the lower support body, and the second upper through hole and the second lower through hole are connected in a one-to-one correspondence. A second bushing coaxial with the corresponding second upper through hole and the second lower through hole is fixedly provided in both the second upper through hole and the second lower through hole. The upper support body and the lower support body are fixedly connected by a second fastener passing through the corresponding second bushing.

11. The battery liquid cooling assembly according to claim 10, characterized in that, The second bushing is made of metal.

12. A battery pack, comprising a housing, a plurality of battery modules, and a battery liquid cooling assembly as described in any one of claims 1 to 11, wherein the battery liquid cooling assembly and the plurality of battery modules are disposed in the housing, and the plurality of battery modules are accommodated between the plurality of liquid cooling modules.

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