Flow channel liquid-cooled battery pack

Abstract

The utility model provides a flow channel liquid cooling battery pack, and belongs to the technical field of battery pack liquid cooling. The runner liquid-cooled battery pack comprises a box body, a first liquid inlet pipe, a first liquid conveying pipe, a plurality of battery modules, an accommodating cavity, a separation frame and a sealing cover, cooling liquid is guided into the first flow channel through the first liquid inlet pipe, the cooling liquid in the first flow channel is conveyed into the Nth flow channel through the first liquid conveying pipe, and when N is 2, the first flow channel and the second flow channel form a cooling and heating alternating flow channel; when N is an integer larger than 2, one flow hole conveys cooling liquid in one flow channel, away from the first flow channel, of the two adjacent flow channels into the other flow channel close to the first flow channel, and the two adjacent flow channels form a cooling and heating alternating flow channel; the whole battery pack is good in temperature uniformity, the problems that in a traditional cooling mode, the pure bottom face cooling area is too small, and the cooling efficiency is not high are solved, and meanwhile the problem that in a traditional immersion type cooling mode, the temperature difference in the whole battery pack is too large is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack liquid cooling, in particular to a flow channel liquid cooling battery pack. Background Art

[0002] With the widespread commercialization of 20-foot standard container energy storage cabinets, controlling the overall temperature difference of the battery pack has become particularly important, as temperature differences have a significant impact on the lifespan of the battery cells. Currently, most energy storage battery packs on the market are bottom-cooled, resulting in a small cooling area and low heat exchange efficiency, making it difficult to effectively prevent thermal runaway. On this basis, immersion cooling can effectively increase the heat exchange area, improve the heat exchange efficiency, and effectively prevent thermal runaway problems. However, in traditional immersion cooling, the coolant enters from one side of the battery pack and flows out from the other side of the battery pack. The temperature of the coolant is lower at the inlet and higher at the outlet, which makes the coolant have a better cooling effect on a part of the battery module close to the inlet and a poor cooling effect on a part of the battery module close to the outlet, which will cause a large temperature difference in the entire battery pack. At the same time, in traditional immersion cooling, the bottom of the battery module directly contacts the bottom of the box, and there is no liquid at the bottom of the battery module. When the battery module has thermal runaway, it is easy to have burnt blue film and leakage problems. The traditional immersion box is formed by welding multiple plates, which is prone to leakage problems. Utility Model Content

[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and to provide a flow channel liquid-cooled battery pack.

[0004] The utility model proposes a flow channel liquid-cooled battery pack, comprising a box body, a first liquid inlet pipe, a first liquid infusion pipe, a plurality of battery modules, a receiving cavity arranged inside the box body, a partition frame connected to the inner wall of the box body for heat conduction, and a sealing cover covering the box body; the partition frame cooperates with the inner wall of the box body to separate the receiving cavity into N flow channels, where N is an integer greater than 1, and the first to Nth flow channels are arranged adjacent to each other in sequence, and the plurality of battery modules are respectively arranged in the N flow channels; one end of the first liquid inlet pipe is placed outside the box body The first end of the first liquid delivery tube is used to deliver the coolant in the first flow channel to the Nth flow channel; when N is an integer greater than 2, the portion of the partition frame located from the Nth flow channel to the second flow channel is provided with N-2 flow holes, and one of the flow holes is used to deliver the coolant in one of the two adjacent flow channels away from the first flow channel to the other flow channel close to the first flow channel.

[0005] Furthermore, the box body is a stamped box body in which the mounting plate is integrally stamped.

[0006] Furthermore, it also includes a bracket arranged in the flow channel to support the battery module, and the cross-sectional area of ​​the bracket is smaller than the cross-sectional area of ​​the flow channel.

[0007] Furthermore, the top end of the bracket is fixedly connected to the bottom end of the battery module by structural adhesive, and the bottom end is fixedly connected to the portion of the box located in the corresponding flow channel by structural adhesive.

[0008] Furthermore, N of the flow channels are arranged in parallel, the N flow channels have the same shape, and a battery module is arranged in each of the flow channels.

[0009] Furthermore, the partition frame includes a crossbeam and N-1 parallel longitudinal beams, both ends of the crossbeam are respectively connected to the first part of the inner wall of the box, one end of the longitudinal beam is connected to a side surface of the crossbeam away from the inner wall of the box, and the other end is connected to the second part of the inner wall of the box, one end of the first liquid inlet pipe is placed outside the box, and the other end passes through the first part of the box and the crossbeam in sequence and extends into the first flow channel close to the crossbeam, one end of the first infusion pipe extends into the first flow channel away from the crossbeam, and the other end extends into the Nth flow channel away from the crossbeam; when N is an integer greater than 2, the N-2 flow holes are respectively arranged on the N-2 longitudinal beams ranging from the second longitudinal beam to the N-1th longitudinal beam, the flow hole located on the N-1th longitudinal beam is arranged away from the other end of the first infusion pipe, and of the two flow holes on the two adjacent longitudinal beams, one flow hole is arranged close to the crossbeam, and the other flow hole is arranged away from the crossbeam.

[0010] Furthermore, the partition frame cooperates with the side wall of the box to divide the accommodating cavity into four flow channels, the axes of the four flow channels are arranged in parallel, there are three longitudinal beams, and the box includes a first side portion, a second side portion, a third side portion, and a fourth side portion connected in sequence, the cross beam is arranged close to the first side portion, one end of the three longitudinal beams is respectively connected to the cross beam, and the other end is connected to the third side portion of the box, the first flow channel is surrounded by the cross beam, the first longitudinal beam, the second longitudinal beam, and the third side portion, the second flow channel is surrounded by the cross beam, the first longitudinal beam, the second longitudinal beam, and the third side portion, the third flow channel is surrounded by the cross beam, the second longitudinal beam, the third longitudinal beam, and the third side portion, and the fourth flow channel is surrounded by the cross beam, the third longitudinal beam, the fourth side portion, and the third side portion.

[0011] Furthermore, the cross beam is a stainless steel cross beam, the longitudinal beam is a stainless steel longitudinal beam, and the longitudinal beam is welded to the cross beam.

[0012] Furthermore, it also includes a sealing gasket connected to the bottom of the sealing cover.

[0013] Furthermore, the longitudinal beam is perpendicular to the transverse beam, and the flow channel is a strip-shaped flow channel.

[0014] The flow channel liquid cooling battery pack of the utility model has the following beneficial effects:

[0015] The first liquid inlet pipe introduces the coolant into the first flow channel, and the first liquid delivery pipe transports the coolant in the first flow channel to the Nth flow channel. When N is 2, the first flow channel and the second flow channel form a hot and cold alternating flow channel; when N is an integer greater than 2, a flow hole transports the coolant in one of the two adjacent flow channels away from the first flow channel to the other flow channel close to the first flow channel, and the two adjacent flow channels form a hot and cold alternating flow channel; the entire battery pack has good temperature uniformity, which solves the problems of too small pure bottom surface cooling area and low cooling efficiency in traditional cooling methods, and also solves the problem of large temperature difference in the entire battery pack in traditional immersion cooling methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.

[0017] Figure 1 This is a schematic diagram of an explosion in a flow channel liquid-cooled battery pack according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a flow channel liquid-cooled battery pack according to an embodiment of the present invention when the sealing cover is omitted;

[0019] Figure 3 This is a schematic structural diagram of a flow channel liquid-cooled battery pack according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the direction of the flow channels when there are four flow channels in a flow channel liquid-cooled battery pack according to an embodiment of the present utility model.

[0021] In the figure: 1-box, 11-accommodating chamber, 12-flow channel, 13-first side, 14-second side, 15-third side, 16-fourth side, 2-first liquid inlet pipe, 3-first liquid delivery pipe, 4-partition frame, 41-crossbeam, 42-longitudinal beam, 421-flow hole, 5-battery module, 6-sealing cover, 7-sealing gasket, 8-bracket, 81-structural adhesive, 9-first liquid outlet pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be arbitrarily combined with each other.

[0023] See also Figures 1 to 4 . A flow channel liquid-cooled battery pack according to an embodiment of the present invention comprises a box body 1, a first liquid inlet pipe 2, a first liquid delivery pipe 3, a plurality of battery modules 5, a receiving chamber 11 arranged on the inner side of the box body 1, a partition frame 4 connected to the inner side wall of the box body 1 for heat conduction, and a sealing cover 6 covering the box body 1; the partition frame 4 cooperates with the inner side wall of the box body 1 to separate the receiving chamber 11 into N flow channels 12, where N is an integer greater than 1, and the first flow channel 12 to the Nth flow channel 12 are arranged adjacent to each other in sequence, and the plurality of battery modules 5 are respectively arranged in the N flow channels 12; one end of the first liquid inlet pipe 2 is placed on the outside of the box body 1, and the other end is placed on the outside of the box body 1. One end passes through the box body 1 and the first part of the partition frame 4 in sequence and extends into the first flow channel 12 to introduce the coolant into the first flow channel 12; the first liquid delivery pipe 3 is used to transport the coolant in the first flow channel 12 to the Nth flow channel 12; when N is an integer greater than 2, the portion of the partition frame 4 located from the Nth flow channel 12 to the second flow channel 12 is provided with N-2 flow holes 421, and one flow hole 421 is used to transport the coolant in one of the two adjacent flow channels 12 away from the first flow channel 12 to the other flow channel 12 close to the first flow channel 12.

[0024] Here, the partition frame 4 cooperates with the inner wall of the box body 1 to divide the accommodating cavity 11 into N flow channels 12. Multiple battery modules 5 are respectively placed in the N flow channels 12, and the cross-sectional area of ​​the battery module 5 is smaller than the cross-sectional area of ​​the flow channel 12, so that the coolant can flow conveniently when the battery module 5 is placed in the flow channel 12. The first liquid inlet pipe 2 inputs the coolant into the first flow channel 12, and the first liquid delivery pipe 3 transports the coolant in the first flow channel 12 to the Nth flow channel 12. From the first flow channel 12 to the Nth flow channel 12, the second flow channel 12 is closest to the first flow channel 12, and the Nth flow channel 12 is farthest from the first flow channel 12; when N is 2, there are only two flow channels 12, namely the first flow channel 12 and the second flow channel 12. The coolant in the first flow channel 12 only cools the battery module 5 in one flow channel 12, then the coolant in the first flow channel 12 The temperature of the coolant is lower, and the coolant in the second flow channel 12 cools the battery modules 5 in the two flow channels 12, so the temperature of the coolant in the second flow channel 12 is higher. The first flow channel 12 and the second flow channel 12 are adjacent to each other to form an alternating cooling flow channel 12, and the temperature uniformity of the entire battery pack is better; when N is an integer greater than 2, there are at least three flow channels 12, and the coolant in the first flow channel 12 only cools the battery module 5 in one flow channel 12. From the second flow channel 12 to the Nth flow channel 12, a flow hole 421 is used to transfer the corresponding The coolant in one of the two adjacent flow channels 12, which is far away from the first flow channel 12, is transported to the other flow channel 12 close to the first flow channel 12. Then, the coolant in the Nth flow channel 12 is transported to the N-1th flow channel 12, and the coolant in the N-1th flow channel 12 is transported to the N-2th flow channel 12. In this way, the coolant in the third flow channel 12 is transported to the second flow channel 12. Due to the influence of the heat generated by the battery pack, the coolant flows through a path with a temperature increase trend, that is, the temperature of the coolant in the first flow channel 12 is the lowest, and the second is the lowest. The temperature of the coolant in the flow channel 12 is the highest. The advantage of the present application is that the first flow channel 12 with the lowest temperature is adjacent to the second flow channel 12 with the highest temperature, forming a hot and cold alternating flow channel 12, and the other flow channels 12 are adjacent to each other, also forming a hot and cold alternating flow channel 12, so that the temperature uniformity of the entire battery pack is better, which solves the problem of too small pure bottom surface cooling area and low cooling efficiency in traditional cooling methods, and solves the problem of large temperature difference in the entire battery pack in traditional immersion cooling methods, and can also effectively solve the problem of thermal runaway of the battery pack.

[0025] Specifically, the coolant is an insulating coolant, and the insulating coolant is a hydrocarbon or a fluorinated liquid.

[0026] The box body 1 can be a stamped box body formed by integral stamping of a mounting plate.

[0027] Specifically, the mounting plate is a stainless steel plate. The box body 1 is made of stainless steel and is formed in one piece by stamping. Compared to the box body 1 formed by welding, which has more leakage points, the box body 1 formed by stamping in this application has fewer leakage points, which can reduce the risk of leakage and solve the problem of easy leakage caused by welding of the traditional immersion box body 1.

[0028] As a flow channel liquid-cooled battery pack in this embodiment, it can also include a bracket 8 arranged in the flow channel 12 to support the battery module 5. The cross-sectional area of ​​the bracket 8 is smaller than the cross-sectional area of ​​the flow channel 12.

[0029] Specifically, the bracket 8 is an aluminum bracket 8. The cross-sectional area of ​​the bracket 8 is smaller than the cross-sectional area of ​​the flow channel 12, which facilitates the flow of the coolant in the flow channel 12. The bracket 8 can be a T-shaped bracket 8.

[0030] The top end of the bracket 8 can be fixedly connected to the bottom end of the battery module 5 by means of structural adhesive 81 , and the bottom end can be fixedly connected to the portion of the box 1 located in the corresponding flow channel 12 by means of structural adhesive 81 .

[0031] Specifically, a T-shaped bracket 8 is designed to be placed at the bottom of the battery module 5 and secured to the housing 1 with structural adhesive 81. The battery module 5 is also secured to the bracket 8 using an extruded aluminum process. Bracket 8 primarily suspends the bottom of the battery module 5, allowing coolant to reach the bottom of the battery module 5. This prevents overheating during thermal runaway, which could damage the blue film and cause insulation failure between the battery and the housing 1. This solves the problem of traditional submerged battery packs lacking liquid at the bottom and prone to burning blue film and leakage during thermal runaway.

[0032] N flow channels 12 can be arranged in parallel, and the N flow channels 12 have the same shape. A battery module 5 is arranged in each flow channel 12 .

[0033] Specifically, a battery module 5 is disposed in each flow channel 12 to improve the cooling efficiency of the coolant in the flow channel 12 .

[0034] The partition frame 4 may include a crossbeam 41 and N-1 parallel longitudinal beams 42. The two ends of the crossbeam 41 are respectively connected to the first part of the inner wall of the box body 1. One end of the longitudinal beam 42 is connected to a side of the crossbeam 41 away from the inner wall of the box body 1, and the other end is connected to the second part of the inner wall of the box body 1. One end of the first liquid inlet pipe 2 is placed outside the box body 1, and the other end passes through the first part of the box body 1 and the crossbeam 41 in sequence and extends into the first flow channel 12 close to the crossbeam 41. One end of the first infusion pipe 3 extends into the first flow channel 12 away from the crossbeam 4. 1, and the other end extends into the Nth flow channel 12 at a position away from the crossbeam 41; when N is an integer greater than 2, N-2 flow holes 421 are respectively arranged on the N-2 longitudinal beams 42 in the range from the second longitudinal beam 42 to the N-1th longitudinal beam 42, the flow hole 421 located on the N-1th longitudinal beam 42 is arranged away from the other end of the first infusion tube 3, and of the two flow holes 421 on the two adjacent longitudinal beams 42, one flow hole 421 is arranged close to the crossbeam 41, and the other flow hole 421 is arranged away from the crossbeam 41.

[0035] Specifically, one end of the first infusion tube 3 extends into the first flow channel 12 at a position away from the crossbeam 41, and the other end extends into the Nth flow channel 12 at a position away from the crossbeam 41. The flow hole 421 on the N-1th longitudinal beam 42 is arranged away from the other end of the first infusion tube 3, so that the coolant in the Nth flow channel 12 cools the battery module 5 in the flow channel 12 and then flows into the N-1th flow channel 12 through the flow hole 421 on the N-1th longitudinal beam 42. Of the two flow holes 421 on the two adjacent longitudinal beams 42, one flow hole 421 is arranged close to the cross beam 41 and the other flow hole 421 is arranged away from the cross beam 41. This ensures that the coolant input from the previous flow channel 12 into the current flow channel 12 must cool the battery module 5 in the current flow channel 12 before being transported to the next flow channel 12. This can not only ensure that the battery module 5 in the current flow channel 12 is cooled, but also ensure that the temperature of the coolant gradually increases from the Nth flow channel 12 to the second flow channel 12, and the temperature of the coolant in the second flow channel 12 is the highest.

[0036] The partition frame 4 can cooperate with the side wall of the box body 1 to separate the accommodating cavity 11 into four flow channels 12. The axes of the four flow channels 12 are arranged in parallel. There are three longitudinal beams 42. The box body 1 includes a first side portion 13, a second side portion 14, a third side portion 15, and a fourth side portion 16 connected in sequence. The cross beam 41 is arranged close to the first side portion 13. One end of the three longitudinal beams 42 is respectively connected to the cross beam 41, and the other end is connected to the third side portion 15 of the box body 1. The first flow channel 12 is surrounded by the cross beam 41, the first longitudinal beam 42, the second side portion 14, and the third side portion 15. The second flow channel 12 is surrounded by the cross beam 41, the first longitudinal beam 42, the second longitudinal beam 42, and the third side portion 15. The third flow channel 12 is surrounded by the cross beam 41, the second longitudinal beam 42, the third longitudinal beam 42, and the third side portion 15. The fourth flow channel 12 is surrounded by the cross beam 41, the third longitudinal beam 42, the fourth side portion 16, and the third side portion 15.

[0037] Specifically, the first side portion 13 and the third side portion 15 are arranged opposite to each other, and the second side portion 14 and the fourth side portion 16 are arranged opposite to each other; one end of the first liquid inlet pipe 2 is placed on the outside of the box body 1, and the other end passes through the box body 1 and the first part of the partition frame 4 in sequence and extends into the first flow channel 12 close to the crossbeam 41, one end of the first infusion pipe 3 extends into the first flow channel 12 close to the third side portion 15, and the other end extends into the fourth flow channel 12 close to the third side portion 15; flow holes 421 are provided on the second longitudinal beam 42 and the third longitudinal beam 42, wherein the flow hole 421 on the third longitudinal beam 42 is arranged on the third longitudinal beam 42 close to the crossbeam 41, and the flow hole 421 on the second longitudinal beam 42 is arranged on the second longitudinal beam 42 close to the third side portion 15.

[0038] Specifically, it can also include a first liquid outlet pipe 9 and a switch valve arranged on the first liquid outlet pipe 9, one end of the first liquid outlet pipe 9 extends into the second flow channel 12 at a position away from the crossbeam 41, and the other end passes through the second part of the box body 1 and extends to the outside of the box body 1, that is, one end of the first liquid outlet pipe 9 extends into the second flow channel 12 at a position close to the third side portion 15, and the other end passes through the third side portion 15 and extends to the outside of the box body 1, so as to discharge the coolant in the second flow channel 12. The insulating coolant enters the first flow channel 12 in the box body 1 through the first liquid inlet pipe 2. The first longitudinal beam 42, the second longitudinal beam 42, and the third longitudinal beam 42 are all provided with a first mounting hole for the first liquid infusion pipe 3 to pass through. The coolant enters the first liquid infusion pipe 3 through the first flow channel 12, and the coolant flows into the fourth flow channel 12 through the first liquid infusion pipe 3; since the third longitudinal beam 42 is provided with a flow hole 421, the coolant in the fourth flow channel 12 enters the third flow channel 12 through the flow hole 421; the second longitudinal beam 42 is provided with a flow hole 421, and the coolant in the third flow channel 12 enters the second flow channel 12 through the flow hole 421, forming a complete cooling cycle. When the battery pack is cooled, the coolant in the second flow channel 12 leaves the battery pack through the first liquid outlet pipe 9.

[0039] The cross beam 41 may be a stainless steel cross beam, and the longitudinal beam 42 may be a stainless steel longitudinal beam. The longitudinal beam 42 is welded to the cross beam 41 .

[0040] Specifically, the cross beam 41 and the longitudinal beam 42 are both made of stainless steel and are fixed to the box body 1 by welding to form the flow channel 12 .

[0041] As a flow channel liquid-cooled battery pack in this embodiment, it can also include a sealing gasket 7 connected to the bottom of the sealing cover 6.

[0042] Specifically, the sealing gasket 7 can improve the sealing effect of the sealing cover 6 .

[0043] The longitudinal beam 42 may be perpendicular to the transverse beam 41 , and the flow channel 12 is a strip-shaped flow channel.

[0044] Specifically, the second side portion 14 is perpendicular to the first side portion 13 , the third side portion 15 is parallel to the first side portion 13 , and the fourth side portion 16 is parallel to the second side portion 14 .

[0045] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of the present invention.

[0046] It should be noted that, in the description of the present application, the terms "upper end", "lower end" and "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0047] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A flow channel liquid-cooled battery pack, characterized in that: The invention comprises a box body (1), a first liquid inlet pipe (2), a first liquid delivery pipe (3), a plurality of battery modules (5), a receiving chamber (11) arranged on the inner side of the box body (1), a partition frame (4) connected to the inner side wall of the box body (1) for heat conduction, and a sealing cover (6) covering the box body (1); the partition frame (4) cooperates with the inner side wall of the box body (1) to separate the receiving chamber (11) into N flow channels (12), N is an integer greater than 1, the first flow channel (12) to the Nth flow channel (12) are arranged adjacent to each other in sequence, and the plurality of battery modules (5) are respectively arranged in the N flow channels (12); one end of the first liquid inlet pipe (2) is placed on the outer side of the box body (1), and the other end is passed through the box body (1) in sequence. The cooling liquid passes through the box body (1) and the first part of the partition frame (4) and extends into the first flow channel (12) to introduce the cooling liquid into the first flow channel (12); the first liquid delivery pipe (3) is used to transport the cooling liquid in the first flow channel (12) to the Nth flow channel (12); when N is an integer greater than 2, the portion of the partition frame (4) located from the Nth flow channel (12) to the second flow channel (12) is provided with N-2 flow holes (421), and one of the flow holes (421) is used to transport the cooling liquid in one of the two adjacent flow channels (12) away from the first flow channel (12) to the other flow channel (12) close to the first flow channel (12).

2. The flow channel liquid-cooled battery pack according to claim 1, characterized in that: The box body (1) is a stamped box body in which the mounting plate is integrally stamped.

3. A flow channel liquid-cooled battery pack according to claim 1 or 2, characterized in that: It also includes a bracket (8) disposed in the flow channel (12) for supporting the battery module (5), wherein the cross-sectional area of ​​the bracket (8) is smaller than the cross-sectional area of ​​the flow channel (12).

4. The flow channel liquid-cooled battery pack according to claim 3, characterized in that: The top end of the bracket (8) is fixedly connected to the bottom end of the battery module (5) via structural adhesive (81), and the bottom end is fixedly connected to the portion of the box (1) located in the corresponding flow channel (12) via structural adhesive (81).

5. The flow channel liquid-cooled battery pack according to claim 1 or 2, characterized in that: The N flow channels (12) are arranged in parallel, the N flow channels (12) have the same shape, and a battery module (5) is arranged in each of the flow channels (12).

6. The flow channel liquid-cooled battery pack according to claim 5, characterized in that: The partition frame (4) includes a crossbeam (41) and N-1 parallel longitudinal beams (42), the two ends of the crossbeam (41) are respectively connected to the first part of the inner wall of the box body (1), one end of the longitudinal beam (42) is connected to a side surface of the crossbeam (41) away from the inner wall of the box body (1), and the other end is connected to the second part of the inner wall of the box body (1), one end of the first liquid inlet pipe (2) is placed outside the box body (1), and the other end passes through the first part of the box body (1) and the crossbeam (41) in sequence and extends into the first flow channel (12) at a position close to the crossbeam (41), and one end of the first liquid inlet pipe (3) extends into the first flow channel (12) away from the crossbeam (41). The first longitudinal beam (41) is provided with a first end and a second end thereof extending into the Nth flow channel (12) and away from the cross beam (41); when N is an integer greater than 2, the N-2 flow holes (421) are respectively provided on the N-2 longitudinal beams (42) ranging from the second longitudinal beam (42) to the N-1th longitudinal beam (42), the flow hole (421) on the N-1th longitudinal beam (42) is provided away from the other end of the first infusion tube (3), and one of the two flow holes (421) on the two adjacent longitudinal beams (42) is provided close to the cross beam (41), and the other flow hole (421) is provided away from the cross beam (41).

7. The flow channel liquid-cooled battery pack according to claim 6, characterized in that: The partition frame (4) cooperates with the side wall of the box body (1) to separate the accommodating cavity (11) into four flow channels (12). The axes of the four flow channels (12) are arranged in parallel. There are three longitudinal beams (42). The box body (1) includes a first side portion (13), a second side portion (14), a third side portion (15), and a fourth side portion (16) connected in sequence. The cross beam (41) is arranged close to the first side portion (13). One end of the three longitudinal beams (42) is respectively connected to the cross beam (41) and the other end is connected to the third side portion (15) of the box body (1). The first longitudinal beam (42) is connected to the cross beam (41) and the other end is connected to the third side portion (15) of the box body (1). The flow channel (12) is surrounded by a cross beam (41), a first longitudinal beam (42), a second side portion (14), and a third side portion (15); the second flow channel (12) is surrounded by a cross beam (41), a first longitudinal beam (42), a second longitudinal beam (42), and a third side portion (15); the third flow channel (12) is surrounded by a cross beam (41), a second longitudinal beam (42), a third longitudinal beam (42), and a third side portion (15); and the fourth flow channel (12) is surrounded by a cross beam (41), a third longitudinal beam (42), a fourth side portion (16), and a third side portion (15).

8. The flow channel liquid-cooled battery pack according to claim 6, characterized in that: The crossbeam (41) is a stainless steel crossbeam, the longitudinal beam (42) is a stainless steel longitudinal beam, and the longitudinal beam (42) is welded to the crossbeam (41).

9. The flow channel liquid-cooled battery pack according to claim 1 or 2, characterized in that: It also includes a sealing gasket (7) connected to the bottom of the sealing cover (6).

10. The flow channel liquid-cooled battery pack according to claim 6, characterized in that: The longitudinal beam (42) is perpendicular to the transverse beam (41), and the flow channel (12) is a strip-shaped flow channel.

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