Lithium battery module with adjustable heat dissipation runner structure and power supply system

Abstract

The invention belongs to the technical field of lithium batteries, and discloses a lithium battery module with an adjustable heat dissipation runner structure and a power supply system. In the lithium battery module, a plurality of square battery cells are transversely arranged in a shell, first sealing pieces are fixedly arranged at the upper part and the lower part of each square battery cell, and the first sealing pieces are arranged on the side surfaces of the square battery cells in a surrounding manner; the first sealing pieces arranged at the upper part and the lower part are arranged between two adjacent square battery cells, heat dissipation flow channels are formed between the square battery cells and the inner wall of the shell, and adjusting sealing pieces are arranged at selected positions of the heat dissipation flow channels; the adjusting sealing piece is used for adjusting the flow channel section area of the heat dissipation flow channel according to the temperature rise condition of the local area so as to adjust and control the heat exchange efficiency. According to the technical scheme, the adjustable heat dissipation flow channel structure is arranged, the heat dissipation efficiency can be selectively improved, then rapid cooling of a local high-heat area can be achieved, and meanwhile refrigeration energy consumption can be saved to a certain degree.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery technology, and specifically relates to a lithium battery module and power system with an adjustable heat dissipation channel structure. Background Technology

[0002] With the development of the power industry, large-capacity, portable lithium battery power systems have become an important alternative to traditional diesel generators for powering transformer field tests. However, such lithium battery power systems require lithium battery modules to continuously discharge at high rates for a short period of time, outputting huge power. This inevitably generates a large amount of Joule heat inside the lithium battery modules, causing the power system temperature to rise sharply.

[0003] To address the aforementioned rapid temperature increases, existing lithium-ion battery liquid cooling systems typically integrate cooling channels within the battery module. Forced convection heat transfer is achieved by the coolant flowing through these channels under the drive of a pump, removing heat generated within the battery system. While this existing cooling solution can reduce temperature to some extent, the uneven heat generation of different cells or modules within the lithium-ion battery power system is due to variations in battery internal resistance, connection impedance, and subtle differences in the environment. This easily leads to localized "hot spots." Furthermore, the channel design, coolant flow rate, and velocity of existing cooling solutions are usually globally uniform. This fixed cooling capacity is insufficient to quickly suppress rapidly rising temperatures in localized areas, causing continuous temperature accumulation in those areas, accelerating aging, and even posing a risk of thermal runaway. In addition, existing liquid cooling structures lack the ability to sense and respond to real-time changes in the internal temperature field of the battery pack, failing to achieve "on-demand allocation" of cooling resources, which also contributes to resource waste. Summary of the Invention

[0004] The purpose of this invention is to provide a lithium battery module and power system with an adjustable heat dissipation channel structure to solve one or more of the aforementioned technical problems. The technical solution disclosed in this invention features an adjustable heat dissipation channel structure, which can selectively improve heat dissipation efficiency, thereby achieving rapid cooling of locally hot areas and saving cooling energy to a certain extent.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a lithium battery module having an adjustable heat dissipation channel structure, comprising: a casing and a square battery cell; Multiple square battery cells are arranged horizontally inside the outer casing to form a square battery cell array in the shape of the letter "I". Each of the square battery cells is fixedly provided with a first sealing element at its upper and lower parts, and the first sealing element is arranged around the side of the square battery cell; the first sealing elements provided at the upper and lower parts form heat dissipation channels between two adjacent square battery cells and between the square battery cell and the inner wall of the outer casing; The outer casing is provided with an inlet and an outlet that are connected to the heat dissipation channel and are used to transport the cooling medium. The selected location of the heat dissipation channel is provided with an adjusting seal; the adjusting seal can remain in a reset state when the temperature in the selected location area is less than a preset threshold, so that the flow cross-sectional area of ​​the heat dissipation channel in the selected location area remains stable; the adjusting seal can also remain in an expanded state when the temperature in the selected location area is greater than or equal to the preset threshold, so that the flow cross-sectional area of ​​the heat dissipation channel in the selected location area becomes smaller to accelerate the flow speed of the cooling medium in the selected location area.

[0006] A further improvement to the technical solution of the present invention lies in the fact that the selected position of the heat dissipation channel is provided with an adjusting seal, the specific structure of which is as follows: The heat dissipation channel includes a first heat dissipation channel parallel to the long side of the square battery cell and a second heat dissipation channel parallel to the short side of the square battery cell; the adjusting seal is horizontally arranged in the first heat dissipation channel; the adjusting seal includes an elastic sealing strip and a thermal element. The two parallel elastic sealing strips form a sealed space that is isolated from the first heat dissipation channel, and the thermistor is disposed within the sealed space.

[0007] A further improvement of the technical solution of the present invention is that the thermal element is a thermal spring.

[0008] A further improvement of the technical solution of the present invention is that the thermistor is a bimetallic sheet.

[0009] A further improvement of the technical solution of the present invention is that a second sealing element is horizontally arranged in the second heat dissipation channel, the number of the second sealing elements is equal to the number of the adjusting sealing elements, and the two ends of the elastic sealing strip are fixedly connected to the second sealing element.

[0010] A further improvement of the technical solution of the present invention is that the liquid inlet is connected to the second heat dissipation channel on one side of the square cell array, and the liquid outlet is connected to the second heat dissipation channel on the other side of the square cell array; the liquid inlet is connected to the cooling medium storage tank through a circulation pump, and the liquid outlet is connected to the cooling medium storage tank.

[0011] A further improvement of the technical solution of the present invention is that a partition is provided on the lower inner side of the outer shell, and a hollow window that cooperates with the square battery cell is opened on the partition. The partition divides the internal space of the outer shell into a battery compartment on the upper side and a cooling medium storage tank on the lower side.

[0012] A further improvement of the technical solution of the present invention is that an inlet manifold is provided on the inner side wall of the outer shell, the inlet manifold is vertically arranged, and the inlet is connected to the lower end of the inlet manifold; an outlet manifold is provided on the inner side wall of the outer shell, the outlet manifold is vertically arranged, and the lower end of the outlet manifold passes through the partition and is connected to the cooling medium storage tank.

[0013] A further improvement of the technical solution of the present invention is that a step is provided on the upper inner side of the outer shell, and a pressure frame is installed at the step. The pressure frame is used to fix the square battery cell inside the outer shell; a sealing gasket is provided between the pressure frame and the square battery cell.

[0014] In a second aspect, the present invention provides a power system including a battery module and an electronic control component, wherein the battery module is a lithium battery module with an adjustable heat dissipation channel structure as described in any of the first aspects of the present invention.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention specifically discloses a lithium battery module with an adjustable heat dissipation channel structure. Addressing the problem of uneven heat generation among different cells or modules within a lithium battery power system, which can easily lead to localized overheating, this invention features an adjustable heat dissipation channel structure. This structure selectively improves heat dissipation efficiency, enabling rapid cooling of locally hot areas while simultaneously saving cooling energy. Specifically, in this invention, first sealing members at the upper and lower parts form heat dissipation channels between two adjacent square cells and between the square cells and the inner wall of the casing. An adjusting sealing member is positioned at a selected location within the heat dissipation channel. This adjusting sealing member remains in a reset state when the temperature at the selected location is below a preset threshold, thus stabilizing the cross-sectional area of ​​the heat dissipation channel at that location. Furthermore, the adjusting sealing member remains in an expanded state when the temperature at the selected location is greater than or equal to the preset threshold, reducing the cross-sectional area of ​​the heat dissipation channel at that location and accelerating the flow rate of the cooling medium. In summary, by installing an adjustable seal, when the temperature of a certain cell locally rises, the thermistor inside the adjustable seal expands, reducing the cross-sectional area of ​​the first heat dissipation channel. This increases the flow rate of the coolant in the first heat dissipation channel at that location, thereby improving heat exchange efficiency and achieving rapid cooling of the local high-heat area.

[0016] In a preferred embodiment of the present invention, by installing the thermistor within a sealed space enclosed by two elastic sealing strips, contact between the coolant and the thermistor for cooling can be avoided, ensuring the accuracy of the thermistor's operation. Furthermore, a first and second heat dissipation channel are formed on the side of the square battery cell, and the square battery cell is tightly installed inside the casing. Heat dissipation channels for the cooling medium are formed around the square battery cell, significantly increasing the contact area between the cooling medium and the lithium battery, thus improving heat dissipation performance. Moreover, the sealing element forms the first and second heat dissipation channels around the square battery cell, eliminating the need for a liquid cooling plate, reducing the space occupied by the liquid cooling plate, and saving on lithium battery production costs. The use of sealing gaskets and sealant prevents the cooling medium from penetrating to the terminal surfaces of the square battery cell, preventing short circuits in the lithium battery and ensuring its safety.

[0017] In a preferred embodiment of the present invention, the design of the thermistor allows the flow rate of the coolant around the battery cell to change according to the temperature at that location. This achieves efficient heat dissipation for localized hot spots and dynamic distribution of the coolant, improving heat dissipation efficiency and saving cooling energy. When the temperature rises, the thermistor expands, opening the two elastic sealing strips and reducing the cross-section of the first heat dissipation channel. When the temperature drops, the thermistor returns to its original position, and the two elastic sealing strips move closer together under elastic force, restoring the cross-section of the first heat dissipation channel.

[0018] In a preferred embodiment of the present invention, the cooling medium storage tank is integrated into the lower part of the battery compartment, which can cool the square battery cell from the bottom, further increasing the heat dissipation area and improving the heat dissipation efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the appearance of a lithium battery module with an adjustable heat dissipation channel structure in an embodiment of the present invention. Figure 2 This is an internal cross-sectional view of a lithium battery module with an adjustable heat dissipation channel structure, as described in an embodiment of the present invention. Figure 3 This is a schematic diagram of the liquid inlet structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the liquid outlet structure in an embodiment of the present invention; Figure 5This is a schematic diagram of the square battery cell structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the adjusting seal state during normal operation in an embodiment of the present invention; Figure 7 This is a schematic diagram of the state of the adjusting seal under localized high temperature in an embodiment of the present invention; The explanations of the reference numerals in the figure are as follows: The annotations in the attached figures are explained below: 1. Square battery cell; 11. First heat dissipation channel; 12. Second heat dissipation channel; 2. Outer shell; 21. Housing; 211. Step; 212. Liquid inlet; 213. Liquid inlet manifold; 214. Liquid outlet manifold; 215. Cooling medium outlet; 22. Cover; 23. Junction box; 3. First sealing element; 4. Partition; 41. Openwork window; 5. Press the frame; 6. Circulating pump; 7. Second sealing element; 8. Adjustable sealing element; 81. Elastic sealing strip; 82. Thermosensitive element. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention; obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Based on the technical solutions disclosed in the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0023] Please see Figures 1 to 5 The present invention provides a lithium battery module with an adjustable heat dissipation channel structure, comprising: a shell 2 and a square battery cell 1.

[0024] The outer casing 2 includes a housing 21 and a cover 22 for sealing the housing 21.

[0025] Multiple square battery cells 1 are arranged horizontally inside the housing 2 to form a "I"-shaped array of square battery cells 1; in an exemplary optional technical solution, the array of square battery cells 1 includes six square battery cells 1 arranged in a "I"-shape.

[0026] Each square battery cell 1 is fixedly provided with a first sealing member 3 at its upper and lower parts, and the first sealing member 3 is arranged around the side of the square battery cell 1. In an exemplary optional technical solution, the first sealing member 3 is made of epoxy resin board, and two sets of first sealing members 3 are respectively attached around the upper and lower parts of the side of the square battery cell 1, thereby forming a first heat dissipation channel 11 parallel to the long side of the square battery cell 1 and a second heat dissipation channel 12 parallel to the short side of the square battery cell 1 on the side of the square battery cell 1. Further illustratively, six square battery cells 1 are tightly installed in a straight line inside the housing 2. The first heat dissipation channel 11 is formed between two adjacent square battery cells 1, and the two outermost square battery cells 1 form a longitudinal heat dissipation channel perpendicular to the length direction of the housing 2 between them and the inner wall of the housing 2. The second heat dissipation channel 12 forms a transverse heat dissipation channel parallel to the length direction of the housing 2 between the side where the short side of the square battery cell 1 is located and the inner wall of the housing 2. In summary, the technical solution of the present invention forms transverse and longitudinal heat dissipation channels around the square cells on the periphery of the square cell array through the first sealing member. On the one hand, this greatly increases the contact area between the cooling medium and the square cells, improving the heat dissipation performance of the lithium battery; on the other hand, it also eliminates the need for a liquid cooling plate, reducing the space occupied by the liquid cooling plate and saving the production cost of the lithium battery.

[0027] The core improvement of the technical solution in this invention lies in the provision of an adjusting seal at a selected location of the heat dissipation channel. This adjusting seal remains in a reset state when the temperature in the selected location area is below a preset threshold, thus stabilizing the flow cross-sectional area of ​​the heat dissipation channel in that area. Furthermore, the adjusting seal remains in an expanded state when the temperature in the selected location area is greater than or equal to the preset threshold, thereby reducing the flow cross-sectional area of ​​the heat dissipation channel in that area and accelerating the flow velocity of the cooling medium. Based on the above-mentioned improved technical solution of this invention, heat exchange efficiency can be improved, rapid cooling of localized high-heat areas can be achieved, and the technical problem that current cooling solutions cannot effectively target localized hot spots can be solved.

[0028] Please see Figures 1 to 4In this embodiment of the invention, a further detailed disclosure of the "outer shell 2 including a box body 21 and a box cover 22 for sealing the box body 21" in the above embodiment is as follows: The outer shell 2 includes a box body 21 and a box cover 22. The box body 21 is a rectangular box with an opening at the top, and the box cover 22 is a corresponding rectangular plate. The box cover 22 can be fixed to the opening of the box body 21 by bolts. A junction box 23 can be arranged on the box cover 22, and a positive and negative terminal block and a charging interface are installed on the junction box 23. A horizontally installed partition 4 is fixed to the lower part of the box body 21. The partition 4 divides the box body 21 into a battery compartment on the upper side and a cooling medium storage tank on the lower side. The square battery cell 1 is placed on the partition 4. In a preferred embodiment, the partition 4 has a perforated window 41 that cooperates with the square battery cell 1. The size of the perforated window 41 is smaller than the size of the bottom surface of the square battery cell 1. The design of the perforated window 41 can expose the lower part of the square battery cell 1, thereby improving the heat dissipation performance of the lower part of the square battery cell 1.

[0029] Please see Figures 2 to 4 The upper end of the housing 21 has a step 211. The distance between the upper surface of the step 211 and the upper surface of the partition 4 is equal to the height of the square battery cell 1. A pressure frame 5 is installed at the step 211 to fix the square battery cell 1 inside the housing 21. The pressure frame 5 is a frame structure and is located at the joints between the square battery cells 1 and between the square battery cell 1 and the housing 21. A sealing gasket (not shown in the figure) is provided between the lower surface of the pressure frame 5 and the upper surface of the square battery cell 1 to prevent the cooling medium from seeping into the wiring of the square battery cell 1 from the joint. In a preferred embodiment, sealant can also be applied between the square battery cells 1 and between the square battery cell 1 and the inner wall of the housing 21 to further prevent leakage of the cooling medium.

[0030] Please see Figure 3 A liquid inlet manifold 213 is provided at the front end of the inner sidewall on the left side of the housing 21. The liquid inlet manifold 213 is arranged vertically, with the upper end of the liquid inlet manifold 213 flush with the top surface of the second heat dissipation channel 12 and the lower end of the liquid inlet manifold 213 flush with the bottom surface of the second heat dissipation channel 12. A liquid inlet 212 is provided at the inner sidewall at the front end of the housing 21, and the liquid inlet 212 is connected to the liquid inlet manifold 213.

[0031] Please see Figure 4 The front end of the inner wall on the right side of the housing 21 is provided with a liquid outlet manifold 214. The liquid outlet manifold 214 is arranged vertically, and the upper end of the liquid outlet manifold 214 is flush with the top surface of the second heat dissipation channel 12. The lower end of the liquid outlet manifold 214 passes through the partition 4 (that is, it is provided with a liquid outlet connected to the heat dissipation channel) and is connected to the cooling medium storage tank.

[0032] In the technical solution provided by this embodiment of the invention, a cooling medium outlet 215 communicating with a cooling medium storage tank is provided on the side of the outer shell 2. A circulation pump 6 is installed on the side of the outer shell 2. The inlet of the circulation pump 6 is connected to the cooling medium outlet 215 through a pipe, and the outlet of the circulation pump 6 is connected to the liquid inlet 212 through a pipe. In use, the circulation pump 6 draws cooling medium from the cooling medium storage tank and pumps it in through the liquid inlet 212. After being distributed by the liquid inlet manifold 213, the cooling medium enters the transverse heat dissipation channel formed by the second heat dissipation channel 12, and then flows from the longitudinal heat dissipation channel formed by the first heat dissipation channel 11 to the opposite transverse heat dissipation channel. Finally, it is collected in the liquid outlet manifold 214 and flows downward back to the cooling medium storage tank, realizing the cyclic cooling of the lithium battery. When the local temperature of the lithium battery rises, the thermal element 82 in the regulating seal 8 at that location expands, reducing the cross-section of the first heat dissipation channel 11 at that location. Since the total flow rate of the circulating pump 6 is constant, the flow rate of the coolant in the first heat dissipation channel 11 increases, thereby improving heat exchange efficiency and achieving rapid cooling of the localized high-heat area. The lower part of the cooling medium storage tank is equipped with heat dissipation fins and a cooling fan to cool the cooling medium inside the tank. In hot weather, a semiconductor refrigerator can also be installed to cool the cooling medium. The cooling medium can be water or insulating oil.

[0033] In further specific exemplary technical solutions of the present invention, such as Figure 5 As shown, three second sealing elements 7 are horizontally fixed within the second heat dissipation channel 12. The second sealing elements 7 can be epoxy resin boards, and they uniformly divide the second heat dissipation channel 12 into four second heat dissipation sub-channels. Additionally, three adjusting sealing elements 8 are horizontally installed within the first heat dissipation channel 11, uniformly dividing it into four first heat dissipation sub-channels. Further illustratively, the adjusting sealing element 8 includes two parallel elastic sealing strips 81, with a thermistor 82 installed between them. When the local temperature rises, the thermistor 82 expands, opening the two elastic sealing strips 81, reducing the cross-section of the first heat dissipation channel 11. When the local temperature drops, the thermistor 82 resets, and the two elastic sealing strips 81 move closer together under elastic force, restoring the cross-section of the first heat dissipation channel 11. In summary, in the improved embodiment of the present invention, by installing an adjusting seal, when the local temperature of the lithium battery rises, the thermistor inside the adjusting seal expands, reducing the cross-section of the first heat dissipation channel. Since the total flow rate of the circulating pump is constant, the flow rate of the coolant flowing through the first heat dissipation channel increases, thereby improving the heat exchange efficiency and achieving rapid cooling of the local high-heat area.

[0034] In a further preferred embodiment of the present invention, the two ends of the two elastic sealing strips 81 are respectively connected to the second sealing members 7 on both sides. The outer diameter of the two elastic sealing strips 81 is equal to the thickness of the first sealing member 3, so that the two elastic sealing strips 81 form a sealed space isolated from the first heat dissipation channel 11. In a preferred embodiment of the present invention, by installing the thermistor within the sealed space formed by the two elastic sealing strips, it is possible to prevent the coolant from contacting the thermistor and affecting the temperature rise of the thermistor, thus ensuring the accuracy of the thermistor's operation.

[0035] In a specific embodiment of the present invention, the thermal element 82 can be a thermal spring, with both ends of the thermal spring connected to the middle of two elastic sealing strips 81 respectively. When the lithium battery locally heats up, the thermal spring extends due to heat, opening the two elastic sealing strips 81. When the lithium battery cools down, the thermal spring shortens, and the two elastic sealing strips 81 return to their original position. Through the design of multiple thermal elements 82, the present invention enables the flow rate of the coolant on the outside of the lithium battery to change according to the temperature at that location. This achieves both efficient heat dissipation of local hot spots and dynamic distribution of coolant, improving heat dissipation efficiency and saving cooling energy.

[0036] Please see Figure 6 and Figure 7 In another embodiment of this application, the thermistor 82 is a bimetallic strip. There are two bimetallic strips arranged side by side, and the middle of the two bimetallic strips is fixed to the side wall of the square battery cell 1 by thermally conductive adhesive. The active layers of the two bimetallic strips are close to each other. When the lithium battery locally heats up, the two bimetallic strips bend due to heat, which opens the two elastic sealing strips 81. When the lithium battery cools down, the two bimetallic strips return to their original position, and the two elastic sealing strips 81 reset.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A lithium battery module with an adjustable heat dissipation channel structure, characterized in that, include: The casing and the square battery cell (1); wherein, Multiple square battery cells (1) are arranged horizontally inside the outer casing to form an array of square battery cells (1) in the shape of an "I". Each of the square battery cells (1) is fixedly provided with a first sealing element (3) at its upper and lower parts, and the first sealing element (3) is arranged around the side of the square battery cell (1); the first sealing element (3) provided at the upper and lower parts forms a heat dissipation channel between two adjacent square battery cells (1) and between the square battery cell (1) and the inner wall of the outer casing; The outer casing is provided with an inlet (212) and an outlet for conveying cooling medium, which are connected to the heat dissipation channel. The selected position of the heat dissipation channel is provided with an adjusting seal (8); the adjusting seal (8) can remain in a reset state when the temperature of the selected position area is less than a preset threshold, so that the flow cross-sectional area of ​​the heat dissipation channel in the selected position area remains stable; the adjusting seal (8) can also remain in an expanded state when the temperature of the selected position area is greater than or equal to the preset threshold, so that the flow cross-sectional area of ​​the heat dissipation channel in the selected position area becomes smaller to accelerate the flow speed of the cooling medium in the selected position area.

2. A lithium battery module with an adjustable heat dissipation channel structure according to claim 1, characterized in that, The specific structure of the adjustable sealing element (8) provided at the selected position of the heat dissipation channel is as follows: The heat dissipation channel includes a first heat dissipation channel (11) parallel to the long side of the square battery cell (1) and a second heat dissipation channel (12) parallel to the short side of the square battery cell (1); the first heat dissipation channel (11) is horizontally provided with the adjusting seal (8); the adjusting seal (8) includes an elastic sealing strip (81) and a thermal element (82). Among them, the two parallel elastic sealing strips (81) form a closed space that is isolated from the first heat dissipation channel (11), and the thermistor (82) is provided in the closed space.

3. A lithium battery module with an adjustable heat dissipation channel structure according to claim 2, characterized in that, The thermal element (82) is a thermal spring.

4. A lithium battery module with an adjustable heat dissipation channel structure according to claim 2, characterized in that, The thermistor (82) is a bimetallic strip.

5. A lithium battery module with an adjustable heat dissipation channel structure according to claim 2, characterized in that, A second sealing element (7) is horizontally arranged inside the second heat dissipation channel (12). The number of the second sealing elements (7) is equal to the number of the adjusting sealing elements (8). The two ends of the elastic sealing strip (81) are fixedly connected to the second sealing element (7), dividing the heat dissipation channel into multiple heat dissipation sub-channels.

6. A lithium battery module with an adjustable heat dissipation channel structure according to claim 2, characterized in that, The liquid inlet (212) is connected to the second heat dissipation channel (12) on one side of the square cell array, and the liquid outlet is connected to the second heat dissipation channel (12) on the other side of the square cell array; the liquid inlet (212) is connected to the cooling medium storage tank through the circulation pump (6), and the liquid outlet is connected to the cooling medium storage tank.

7. A lithium battery module with an adjustable heat dissipation channel structure according to claim 6, characterized in that, A partition (4) is provided on the lower inner side of the outer casing. A perforated window (41) is provided on the partition (4) to cooperate with the square battery cell (1). The partition (4) divides the internal space of the outer casing into a battery compartment on the upper side and a cooling medium storage tank on the lower side.

8. A lithium battery module with an adjustable heat dissipation channel structure according to claim 7, characterized in that, The inner wall of the outer shell is provided with an inlet manifold (213), which is vertically arranged. The inlet port (212) is connected to the lower end of the inlet manifold (213). The inner wall of the outer shell is provided with an outlet manifold (214), which is vertically arranged. The lower end of the outlet manifold (214) passes through the partition (4) and is connected to the cooling medium storage tank.

9. A lithium battery module with an adjustable heat dissipation channel structure according to claim 1, characterized in that, A step (211) is provided on the upper inner side of the outer casing, and a pressure frame (5) is installed at the step (211). The pressure frame (5) is used to fix the square battery cell (1) inside the outer casing. A sealing gasket is provided between the pressure frame (5) and the square battery cell (1).

10. A power supply system, comprising a battery module and an electronic control component, characterized in that, The battery module is a lithium battery module with an adjustable heat dissipation channel structure as described in any one of claims 1 to 9.

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