Battery module, battery pack, and vehicle

Abstract

The application provides a battery module, a battery pack and a vehicle. The battery module comprises: a cell group comprising a plurality of cells arranged in an array along a row direction and a column direction, and the top of each cell is provided with a positive pole and a negative pole; a first liquid cooling assembly comprising a plurality of first liquid cooling plates, the first liquid cooling plates are arranged at the top of each cell along the row direction and are located between the positive pole and the negative pole of each cell in the same column; and a second liquid cooling assembly comprising a plurality of second liquid cooling plates, the second liquid cooling plates and each row of cells are arranged in an array along the column direction and are located between the large faces of two adjacent rows of cells. The first liquid cooling plates are arranged in the blank area between the positive pole and the negative pole to realize pole position heat dissipation. The second liquid cooling plates realize cell large face heat dissipation, reduce the temperature difference of the cells themselves, and improve the service life.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a battery module, battery pack, and vehicle. Background Technology

[0002] As the core power supply component of electric vehicles, the proper functioning of the battery module is fundamental to the normal operation of the vehicle. One of the crucial conditions for the normal operation of the battery module is that its internal temperature must remain within a certain range. Excessively high or low internal temperatures will affect the battery module's charging and discharging capabilities, reliability, and lifespan. During high-rate charging and discharging processes, the temperature at the terminals of lithium-ion power batteries is higher than the surface temperature of the cell, resulting in a large temperature difference within the cell itself and impacting its cycle life.

[0003] In related technologies, liquid cooling plates are mainly placed on the large surface of the battery cell. The heat dissipation or heating of the battery cell is achieved by adjusting the liquid cooling plate. However, the liquid cooling plate of this solution can only partially dissipate heat or heat the large surface of the battery cell. Under high temperature or low temperature conditions, the heat dissipation or heating rate at the terminal post will be relatively slow, which will affect the performance of the battery module. Utility Model Content

[0004] This application provides a battery module, a battery pack, and a vehicle to solve the problems in the prior art.

[0005] In a first aspect, embodiments of this application provide a battery module, including:

[0006] A battery cell assembly includes multiple battery cells, which are arranged in an array along the row and column directions. The top of each battery cell is provided with positive and negative terminals spaced apart along the row direction.

[0007] The first liquid cooling assembly includes a plurality of first liquid cooling plates, which are spaced apart on the top of each of the battery cells along the row direction and extend along the column direction, and are located between the positive and negative terminals of each of the battery cells in the same column.

[0008] The second liquid cooling assembly includes a plurality of second liquid cooling plates, the plurality of second liquid cooling plates and the rows of battery cells are arranged alternately along the column direction, the second liquid cooling plates extend along the row direction and are located between the large faces of two adjacent rows of battery cells.

[0009] Optionally, the first liquid cooling assembly further includes a first liquid cooling pipeline, which is disposed on the periphery of the battery cell assembly. The first liquid cooling pipeline includes a first inlet and a first outlet. The first liquid cooling plate is provided with a first liquid cooling channel, and the first liquid cooling channel of each first liquid cooling plate is connected to the first liquid cooling pipeline.

[0010] The second liquid cooling assembly further includes a second liquid cooling pipeline, which is disposed on the periphery of the battery cell assembly. The second liquid cooling pipeline includes a second inlet and a second outlet. The second liquid cooling plate is provided with a second liquid cooling channel, and the second liquid cooling channel of each second liquid cooling plate is connected to the second liquid cooling pipeline.

[0011] Optionally, the first liquid cooling pipeline includes a first liquid cooling pipe, a second liquid cooling pipe, and a third liquid cooling pipe. The first liquid cooling pipe and the second liquid cooling pipe are disposed on the same side of the battery cell assembly along the column direction, and the third liquid cooling pipe is disposed on the other side of the battery cell assembly along the column direction. The first liquid cooling pipe is provided with the first water inlet, and the second liquid cooling pipe is provided with the first water outlet.

[0012] The first liquid cooling channel of each of the first liquid cooling plates is connected to the third liquid cooling pipe at its first end along the column direction. The first liquid cooling channel of some of the first liquid cooling plates is connected to the first liquid cooling pipe at its second end along the column direction. The first liquid cooling channel of other parts of the first liquid cooling plates is connected to the second liquid cooling pipe at its second end along the column direction.

[0013] Optionally, the second liquid cooling pipeline includes a fourth liquid cooling pipe and a fifth liquid cooling pipe, the fourth liquid cooling pipe being disposed on one side of the battery cell assembly along the row direction, and the fifth liquid cooling pipe being disposed on the other side of the battery cell assembly along the row direction; the fourth liquid cooling pipe is provided with a second water inlet, and the fifth liquid cooling pipe is provided with a second water outlet;

[0014] The first end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fourth liquid cooling pipe, and the second end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fifth liquid cooling pipe.

[0015] Optionally, the second liquid cooling pipeline includes a fourth liquid cooling pipe, a fifth liquid cooling pipe, a sixth liquid cooling pipe, and a seventh liquid cooling pipe. The fourth liquid cooling pipe is disposed on one side of the battery cell assembly along the row direction, the fifth liquid cooling pipe is disposed on the other side of the battery cell assembly along the row direction, and the sixth and seventh liquid cooling pipes are disposed on the same side of the battery cell assembly along the column direction. The sixth liquid cooling pipe is connected to the fourth liquid cooling pipe, and the seventh liquid cooling pipe is connected to the fifth liquid cooling pipe. The sixth liquid cooling pipe is provided with a second water inlet, and the seventh liquid cooling pipe is provided with a second water outlet.

[0016] The first end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fourth liquid cooling pipe, and the second end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fifth liquid cooling pipe.

[0017] Optionally, the first liquid cooling pipeline includes a first liquid cooling pipe, a second liquid cooling pipe, and a third liquid cooling pipe. The first liquid cooling pipe and the second liquid cooling pipe are disposed on the same side of the battery cell assembly along the column direction, and the third liquid cooling pipe is disposed on the other side of the battery cell assembly along the column direction. The first liquid cooling pipe is provided with the first water inlet, and the second liquid cooling pipe is provided with the first water outlet.

[0018] The second liquid cooling pipeline includes a fourth liquid cooling pipe, a fifth liquid cooling pipe, a sixth liquid cooling pipe, and a seventh liquid cooling pipe. The fourth liquid cooling pipe is disposed on one side of the battery cell assembly along the row direction, the fifth liquid cooling pipe is disposed on the other side of the battery cell assembly along the row direction, and the sixth and seventh liquid cooling pipes are disposed on the same side of the battery cell assembly along the column direction as the first and second liquid cooling pipes. The sixth liquid cooling pipe is connected to the fourth liquid cooling pipe, and the seventh liquid cooling pipe is connected to the fifth liquid cooling pipe. The sixth liquid cooling pipe is provided with a second water inlet, and the seventh liquid cooling pipe is provided with a second water outlet.

[0019] The first liquid cooling channel of each of the first liquid cooling plates is connected to the third liquid cooling pipe at the first end along the column direction; the first liquid cooling channel of some of the first liquid cooling plates is connected to the first liquid cooling pipe at the second end along the column direction; and the first liquid cooling channel of other parts of the first liquid cooling plates is connected to the second liquid cooling pipe at the second end along the column direction.

[0020] The first end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fourth liquid cooling pipe, and the second end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fifth liquid cooling pipe.

[0021] Optionally, the fourth liquid cooling pipe and the sixth liquid cooling pipe are integrally formed; and / or

[0022] The fifth liquid cooling pipe and the seventh liquid cooling pipe are integrally formed.

[0023] Optionally, the top surface height of the positive electrode post and the negative electrode post is higher than the top surface height of the first liquid cooling plate.

[0024] Secondly, embodiments of this application provide a battery pack, including a battery box and a battery module as described in the first aspect, wherein the battery module is disposed inside the battery box; and the first water inlet, the first water outlet, the second water inlet and the second water outlet extend out of the battery box.

[0025] Optionally, the battery box includes a lower tray and an upper cover disposed on the lower tray, the first liquid cooling assembly is disposed on the upper cover, and the battery cell assembly and the second liquid cooling assembly are disposed on the lower tray.

[0026] Thirdly, embodiments of this application provide a vehicle, including:

[0027] The battery module as described in the first aspect; or

[0028] The battery pack as described in the second aspect.

[0029] The battery module provided in this application has a first liquid cooling plate placed between the positive and negative terminals of the battery cell, making full use of the blank area between the positive and negative terminals. A second liquid cooling plate is placed between the large surfaces of each row of battery cells. The first liquid cooling plate can dissipate heat and heat at the terminals of the battery cell, while the second liquid cooling plate can dissipate heat or heat the large surfaces of the battery cell, thereby reducing the temperature difference of the battery cell itself and improving the service life of the battery cell. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a battery cell module provided in one embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the structure of a first liquid cooling assembly and a second liquid cooling assembly provided in an embodiment of this application.

[0032] Figure 3 yes Figure 2 Top view.

[0033] Figure 4 This is a cross-sectional schematic diagram of the battery cell of a battery cell module provided in one embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the structure of the top cover of a battery pack provided in one embodiment of this application. Detailed Implementation

[0035] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0037] This application provides a battery module, a battery pack, and a vehicle. The battery module, battery pack, and vehicle of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0038] See Figures 1 to 4 As shown in the figure, this application provides a battery module, including: a cell group 10, a first liquid cooling component and a second liquid cooling component.

[0039] The battery cell assembly 10 includes multiple battery cells 11 arranged in an array along the row and column directions. Each battery cell 11 has a positive electrode post 12 and a negative electrode post 13 spaced apart along the row direction on its top. An explosion-proof valve 14 is located at the bottom of each battery cell 11. Optionally, the battery cell 11 is a prismatic cell. The battery module is a lithium battery.

[0040] The first liquid cooling assembly includes a first liquid cooling pipe 21 and multiple first liquid cooling plates 22. The multiple first liquid cooling plates 22 are spaced apart along the row direction on top of each battery cell 11, and extend along the column direction, located between the positive terminal 12 and negative terminal 13 of each battery cell 11 in the same column. The first liquid cooling pipe 21 is disposed around the periphery of the battery cell assembly 10, and includes a first inlet 23 and a first outlet 24. Each first liquid cooling plate 22 has a first liquid cooling channel, and the first liquid cooling channel of each first liquid cooling plate 22 is connected to the first liquid cooling pipe 21. Thus, liquid cooling material can enter the first liquid cooling pipe 21 from the first inlet 23, flow through the first liquid cooling channels of each first liquid cooling plate 22, and then flow out of the first liquid cooling pipe 21 from the first outlet 24, achieving liquid cooling circulation at the battery cell terminals. Optionally, the first liquid cooling plates can be fixed to the battery cells by adhesive.

[0041] The second liquid cooling assembly includes a second liquid cooling pipe 31 and multiple second liquid cooling plates 32. The multiple second liquid cooling plates 32 and rows of battery cells 11 are arranged alternately along the column direction. The second liquid cooling plates 32 extend along the row direction and are located between the large surfaces of adjacent rows of battery cells 11. The large surface of a battery cell can be understood as the side with the largest area. The second liquid cooling pipe 31 is disposed around the periphery of the battery cell assembly 10. The second liquid cooling pipe 31 includes a second inlet 33 and a second outlet 34. Second liquid cooling channels are provided within the second liquid cooling plates 32, and the second liquid cooling channels of each second liquid cooling plate 32 are connected to the second liquid cooling pipe 31. Thus, liquid cooling material can enter the second liquid cooling pipe 31 from the second inlet 33, flow through the second liquid cooling channels of each second liquid cooling plate 32, and then flow out of the second liquid cooling pipe 31 from the second outlet 34, achieving liquid cooling circulation to the large surface area of ​​the battery cells. The circulation direction of the first liquid cooling assembly and the second liquid cooling assembly is as follows: Figure 3 As indicated by the middle arrow, the two liquid cooling systems are independently controlled and used without affecting each other. Optionally, the second liquid cooling plate can be sandwiched between the large surfaces of two adjacent rows of cells.

[0042] The battery module provided in this application has a first liquid cooling plate 22 disposed between the positive terminal 12 and the negative terminal 13 of the battery cell 11, making full use of the blank area between the positive and negative terminals. A second liquid cooling plate 32 is disposed between the large surfaces of each row of battery cells 11. The first liquid cooling plate 22 can dissipate heat and heat at the terminal position of the battery cell 11, and the second liquid cooling plate 32 can dissipate heat or heat at the large surface of the battery cell 11, thereby reducing the temperature difference of the battery cell 11 itself. This solves the problem that the temperature at the terminal position of the lithium-ion power battery is higher than the temperature of the large surface of the battery cell during high-rate charging and discharging, resulting in an excessive temperature difference within the battery cell itself, and improves the service life of the battery cell 11.

[0043] In some alternative implementations, the top surface height of the positive terminal 12 and the negative terminal 13 is higher than the top surface height of the first liquid cooling plate 22, making full use of the blank area between the positive and negative terminals without occupying additional space or increasing the height of the battery cell.

[0044] See Figure 2 and Figure 3 As shown, in some optional embodiments, the first liquid cooling pipeline 21 includes a first liquid cooling pipe 211, a second liquid cooling pipe 212, and a third liquid cooling pipe 213. The first liquid cooling pipe 211 and the second liquid cooling pipe 212 are disposed on the same side of the cell assembly 10 along the column direction (shown as the front side in the figure), and the third liquid cooling pipe 213 is disposed on the other side of the cell assembly 10 along the column direction (shown as the rear side in the figure). The first liquid cooling pipe 211 is provided with a first inlet 23, and the second liquid cooling pipe 212 is provided with a first outlet 24. In this embodiment, the first liquid cooling pipe 211 is located in the left half of the front side of the cell assembly, and the second liquid cooling pipe 212 is located in the right half of the front side.

[0045] The first liquid cooling channel of each first liquid cooling plate 22 is connected to the third liquid cooling pipe 213 at its first end along the column direction (shown as the rear end in the figure), and the second end along the column direction (shown as the front end in the figure) of the first liquid cooling channel of some first liquid cooling plates 22 is connected to the first liquid cooling pipe 211. The second end along the column direction of the first liquid cooling channel of another part of the first liquid cooling plates 22 is connected to the second liquid cooling pipe 212. In this way, the liquid cooling material can enter the first liquid cooling pipe 211 from the first inlet 23, flow from front to back through a part of the first liquid cooling channel of the first liquid cooling plate 22 and then enter the third liquid cooling pipe 213. It then flows through the third liquid cooling pipe 213 to another part of the first liquid cooling plates 22, flows from back to front through the first liquid cooling channel of another part of the first liquid cooling plates 22 and then enters the second liquid cooling pipe 212. Finally, it flows out from the first outlet 24, realizing the liquid cooling circulation of the cell electrode position.

[0046] See Figure 2 and Figure 3As shown, in some optional embodiments, the second liquid cooling line 31 includes a fourth liquid cooling line 311 and a fifth liquid cooling line 312. The fourth liquid cooling line 311 is disposed on one side of the battery cell assembly 10 along the row direction (left side shown in the figure), and the fifth liquid cooling line 312 is disposed on the other side of the battery cell assembly 10 along the row direction (right side shown in the figure). The fourth liquid cooling line 311 is provided with a second water inlet 33, and the fifth liquid cooling line 312 is provided with a second water outlet 34.

[0047] The first end (left end in the figure) of the second liquid cooling channel of each second liquid cooling plate 32 along the direction of travel is connected to the fourth liquid cooling pipe 311, and the second end (right end in the figure) of the second liquid cooling channel of each second liquid cooling plate 32 along the direction of travel is connected to the fifth liquid cooling pipe 312. In this way, the liquid cooling material can enter the fourth liquid cooling pipe 311 from the second inlet 33, flow from left to right through the second liquid cooling channel of the second liquid cooling plate 32 and enter the fifth liquid cooling pipe 312, and then flow out from the second outlet 34, realizing liquid cooling circulation for the large area of ​​the battery cell.

[0048] See Figure 2 and Figure 3 As shown, in some optional embodiments, the second liquid cooling pipeline 31 includes a fourth liquid cooling pipe 311, a fifth liquid cooling pipe 312, a sixth liquid cooling pipe 313, and a seventh liquid cooling pipe 314. The fourth liquid cooling pipe 311 is disposed on one side of the cell assembly 10 along the row direction (left side shown in the figure), the fifth liquid cooling pipe 312 is disposed on the other side of the cell assembly 10 along the row direction (right side shown in the figure), and the sixth liquid cooling pipe 313 and the seventh liquid cooling pipe 314 are disposed on the same side of the cell assembly 10 along the column direction (front side shown in the figure). The sixth liquid cooling pipe 313 is connected to the fourth liquid cooling pipe 311, and the seventh liquid cooling pipe 314 is connected to the fifth liquid cooling pipe 312. The sixth liquid cooling pipe 313 is provided with a second inlet 33, and the seventh liquid cooling pipe 314 is provided with a second outlet 34.

[0049] The first end (left end in the figure) of the second liquid cooling channel of each second liquid cooling plate 32 along the direction of travel is connected to the fourth liquid cooling pipe 311, and the second end (right end in the figure) of the second liquid cooling channel of each second liquid cooling plate 32 along the direction of travel is connected to the fifth liquid cooling pipe 312. In this way, the liquid cooling material can enter the sixth liquid cooling pipe 313 from the second inlet 33 and then flow into the fourth liquid cooling pipe 311, then flow from left to right through the second liquid cooling channel of the second liquid cooling plate 32 and then into the fifth liquid cooling pipe 312, and then flow into the seventh liquid cooling pipe 314 and out from the second outlet 34, realizing liquid cooling circulation for the large area of ​​the battery cell.

[0050] See Figure 2 and Figure 3As shown, in some optional embodiments, the sixth liquid cooling pipe 313 and the seventh liquid cooling pipe 314 are disposed on the same side (front side shown in the figure) of the cell assembly 10 along the column direction, along with the first liquid cooling pipe 211 and the second liquid cooling pipe 212. This allows the first water inlet 23, the second water inlet 33, the first water outlet 24, and the second water outlet 34 to be located on the same side of the cell assembly 10. Only one liquid cooling device needs to be installed on one side of the battery module to simultaneously connect to the first water inlet 23, the second water inlet 33, the first water outlet 24, and the second water outlet 34, saving on the number of liquid cooling devices and facilitating the installation and arrangement of the liquid cooling device piping. This avoids the problem of needing additional piping when the first water inlet 23, the second water inlet 33, the first water outlet 24, and the second water outlet 34 are located on different sides of the cell assembly 10. Optionally, each liquid cooling pipe can be a water pipe.

[0051] In some alternative embodiments, the fourth liquid cooling pipe 311 and the sixth liquid cooling pipe 313 are integrally formed for ease of manufacturing. The connection between the fourth liquid cooling pipe 311 and the sixth liquid cooling pipe 313 is a rounded transition for easy installation inside the battery box of the battery pack. The fifth liquid cooling pipe 312 and the seventh liquid cooling pipe 314 are integrally formed for ease of manufacturing. The connection between the fifth liquid cooling pipe 312 and the seventh liquid cooling pipe 314 is a rounded transition for easy installation inside the battery box of the battery pack.

[0052] In the battery module of this application, the temperature at the terminal positions of the battery cells is high at the beginning of battery pack charging. The first liquid cooling plate located at the terminal positions can be activated first to cool these positions. Once the overall temperature rises, the second liquid cooling plate located at the main surface is activated. Near the end of charging, the second liquid cooling plate is deactivated first, followed by the first liquid cooling plate. Since the first liquid cooling plate at the terminal positions uses significantly less power than the second liquid cooling plate, this technical solution can reduce the temperature difference within the battery cells themselves, while also reducing the power consumption of the entire thermal management system and extending the lifespan of the battery cells.

[0053] This application provides a battery pack, including a battery box and a battery module as described in the above embodiments and implementations, wherein the battery module is disposed inside the battery box.

[0054] At the beginning of battery pack charging, the temperature at the cell terminals is high. The first liquid cooling plate located at the terminals can be activated first to cool this area. Once the overall temperature rises, the second liquid cooling plate located at the larger surface area can be activated. Near the end of charging, the second liquid cooling plate is deactivated before the first. Since the first liquid cooling plate at the terminals uses significantly less power than the second, this technical solution reduces the temperature difference within the cell itself, lowers the power consumption of the entire thermal management system, and extends the cell's lifespan.

[0055] See Figure 5As shown, in some optional embodiments, the battery box includes a lower tray and an upper cover 40 covering the lower tray. The first liquid cooling assembly is disposed on the upper cover 40, and the cell assembly 10 and the second liquid cooling assembly are disposed on the lower tray. Thus, by integrating the first liquid cooling assembly with the upper cover 40 of the battery box, after the cell assembly and the second liquid cooling assembly are installed on the lower tray, the upper cover can be directly placed on the lower tray. Once installed, the position of the first liquid cooling plate of the first liquid cooling assembly is aligned between the positive and negative terminals of each cell, facilitating operation. In other embodiments, the first liquid cooling assembly can also be separately configured and not integrated with the upper cover. Alternatively, the first liquid cooling assembly can be directly integrated with each cell of the cell assembly.

[0056] This application also provides a vehicle, including: the battery module described in the above embodiments and implementations, or the battery pack described in the above embodiments and implementations.

[0057] At the beginning of battery pack charging, the temperature at the cell terminals is high. The first liquid cooling plate located at the terminals can be activated first to cool this area. Once the overall temperature rises, the second liquid cooling plate located at the larger surface area can be activated. Near the end of charging, the second liquid cooling plate is deactivated before the first. Since the first liquid cooling plate at the terminals uses significantly less power than the second, this technical solution reduces the temperature difference within the cell itself, lowers the power consumption of the entire thermal management system, and extends the cell's lifespan.

[0058] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery module, characterized in that, include: A battery cell assembly includes multiple battery cells, which are arranged in an array along the row and column directions. The top of each battery cell is provided with positive and negative terminals spaced apart along the row direction. The first liquid cooling assembly includes a plurality of first liquid cooling plates, which are spaced apart on the top of each of the battery cells along the row direction and extend along the column direction, and are located between the positive and negative terminals of each of the battery cells in the same column. The second liquid cooling assembly includes a plurality of second liquid cooling plates, the plurality of second liquid cooling plates and the rows of battery cells are arranged alternately along the column direction, the second liquid cooling plates extend along the row direction and are located between the large faces of two adjacent rows of battery cells.

2. The battery module according to claim 1, characterized in that, The first liquid cooling assembly further includes a first liquid cooling pipeline, which is disposed on the periphery of the battery cell assembly. The first liquid cooling pipeline includes a first inlet and a first outlet. The first liquid cooling plate is provided with a first liquid cooling channel, and the first liquid cooling channel of each first liquid cooling plate is connected to the first liquid cooling pipeline. The second liquid cooling assembly further includes a second liquid cooling pipeline, which is disposed on the periphery of the battery cell assembly. The second liquid cooling pipeline includes a second inlet and a second outlet. The second liquid cooling plate is provided with a second liquid cooling channel, and the second liquid cooling channel of each second liquid cooling plate is connected to the second liquid cooling pipeline.

3. The battery module according to claim 2, characterized in that, The first liquid cooling pipeline includes a first liquid cooling pipe, a second liquid cooling pipe, and a third liquid cooling pipe. The first liquid cooling pipe and the second liquid cooling pipe are disposed on the same side of the battery cell assembly along the column direction, and the third liquid cooling pipe is disposed on the other side of the battery cell assembly along the column direction. The first liquid cooling pipe is provided with a first water inlet, and the second liquid cooling pipe is provided with a first water outlet. The first liquid cooling channel of each of the first liquid cooling plates is connected to the third liquid cooling pipe at its first end along the column direction. The first liquid cooling channel of some of the first liquid cooling plates is connected to the first liquid cooling pipe at its second end along the column direction. The first liquid cooling channel of other parts of the first liquid cooling plates is connected to the second liquid cooling pipe at its second end along the column direction.

4. The battery module according to claim 2, characterized in that, The second liquid cooling pipeline includes a fourth liquid cooling pipe and a fifth liquid cooling pipe. The fourth liquid cooling pipe is disposed on one side of the battery cell assembly along the row direction, and the fifth liquid cooling pipe is disposed on the other side of the battery cell assembly along the row direction. The fourth liquid cooling pipe is provided with a second water inlet, and the fifth liquid cooling pipe is provided with a second water outlet. The first end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fourth liquid cooling pipe, and the second end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fifth liquid cooling pipe.

5. The battery module according to claim 2, characterized in that, The second liquid cooling pipeline includes a fourth liquid cooling pipe, a fifth liquid cooling pipe, a sixth liquid cooling pipe, and a seventh liquid cooling pipe. The fourth liquid cooling pipe is disposed on one side of the battery cell assembly along the row direction, the fifth liquid cooling pipe is disposed on the other side of the battery cell assembly along the row direction, and the sixth and seventh liquid cooling pipes are disposed on the same side of the battery cell assembly along the column direction. The sixth liquid cooling pipe is connected to the fourth liquid cooling pipe, and the seventh liquid cooling pipe is connected to the fifth liquid cooling pipe. The sixth liquid cooling pipe is provided with a second water inlet, and the seventh liquid cooling pipe is provided with a second water outlet. The first end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fourth liquid cooling pipe, and the second end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fifth liquid cooling pipe.

6. The battery module according to claim 2, characterized in that, The first liquid cooling pipeline includes a first liquid cooling pipe, a second liquid cooling pipe, and a third liquid cooling pipe. The first liquid cooling pipe and the second liquid cooling pipe are disposed on the same side of the battery cell assembly along the column direction, and the third liquid cooling pipe is disposed on the other side of the battery cell assembly along the column direction. The first liquid cooling pipe is provided with a first water inlet, and the second liquid cooling pipe is provided with a first water outlet. The second liquid cooling pipeline includes a fourth liquid cooling pipe, a fifth liquid cooling pipe, a sixth liquid cooling pipe, and a seventh liquid cooling pipe. The fourth liquid cooling pipe is disposed on one side of the battery cell assembly along the row direction, the fifth liquid cooling pipe is disposed on the other side of the battery cell assembly along the row direction, and the sixth and seventh liquid cooling pipes are disposed on the same side of the battery cell assembly along the column direction as the first and second liquid cooling pipes. The sixth liquid cooling pipe is connected to the fourth liquid cooling pipe, and the seventh liquid cooling pipe is connected to the fifth liquid cooling pipe. The sixth liquid cooling pipe is provided with a second water inlet, and the seventh liquid cooling pipe is provided with a second water outlet. The first liquid cooling channel of each of the first liquid cooling plates is connected to the third liquid cooling pipe at the first end along the column direction; the first liquid cooling channel of some of the first liquid cooling plates is connected to the first liquid cooling pipe at the second end along the column direction; and the first liquid cooling channel of other parts of the first liquid cooling plates is connected to the second liquid cooling pipe at the second end along the column direction. The first end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fourth liquid cooling pipe, and the second end of the second liquid cooling channel of each of the second liquid cooling plates along the direction of travel is connected to the fifth liquid cooling pipe.

7. The battery module according to claim 5 or 6, characterized in that, The fourth liquid cooling pipe is integrally formed with the sixth liquid cooling pipe; and / or The fifth liquid cooling pipe and the seventh liquid cooling pipe are integrally formed.

8. The battery module according to claim 1, characterized in that, The top surface height of the positive electrode and the negative electrode is higher than the top surface height of the first liquid cooling plate.

9. A battery pack, characterized in that, The device includes a battery box and a battery module as described in any one of claims 1 to 8, wherein the battery module is disposed inside the battery box; the first water inlet, the first water outlet, the second water inlet, and the second water outlet extend outside the battery box.

10. The battery pack according to claim 9, characterized in that, The battery box includes a lower tray and an upper cover disposed on the lower tray. The first liquid cooling component is disposed on the upper cover, and the battery cell assembly and the second liquid cooling component are disposed on the lower tray.

11. A vehicle, characterized in that, include: The battery module as described in any one of claims 1 to 8; or The battery pack as described in claim 9 or 10.

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