Liquid cooling system for suppressing thermal runaway of battery cells and battery cell module with integrated liquid cooling system

Abstract

The present invention relates to a liquid cooling system for suppressing thermal runaway of a battery cell and a battery cell module of an integrated liquid cooling system. The liquid cooling system for suppressing thermal runaway of a battery cell comprises two liquid cooling plates, which are used to be attached to opposite sides of a battery cell. The side walls where the battery cell and the liquid cooling plate are attached are provided with explosion-proof valves, which are connected to the liquid cooling plates, and when the explosion-proof valves are broken, the refrigerant channel in the liquid cooling plate is connected to the battery cell. In the liquid cooling system of the present application, when the battery cell is working normally, the refrigerant in the liquid cooling plate takes away part of the heat generated by the battery cell during normal circulation, which plays a role in cooling the battery cell and preventing the battery cell from being overheated. When the battery cell is thermally runaway, the electrolyte in the battery cell is gasified, the pressure in the battery cell increases, causing the explosion-proof valve to break, the refrigerant channel in the liquid cooling plate is connected to the battery cell, and the refrigerant enters the battery cell, changing the indirect heat exchange of the liquid cooling plate to direct heat exchange by immersion. While cooling the battery cell, the refrigerant dilutes the electrolyte to suppress chemical reactions, thereby suppressing thermal runaway of the battery cell from the source.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a liquid cooling system for suppressing thermal runaway of a battery cell and a battery cell module integrated with the liquid cooling system. Background Art

[0002] Lithium-ion batteries are favored for their high energy density and long cycle life. With the upgrading of battery technology, the heat generation power of batteries is also rising rapidly. In order to develop better lithium-ion batteries, the problem of thermal runaway is usually unavoidable. Thermal runaway of battery cells is usually divided into two paths: internal and external. The internal path refers to thermal runaway caused by chemical reactions in the battery cell. When the temperature inside the battery cell continues to rise, the vaporized electrolyte rushes out of the explosion-proof valve. At this time, the thermal runaway enters the external path. The high-temperature and high-pressure electrolyte gas comes into contact with external oxygen, which will cause combustion or even explosion.

[0003] The mainstream energy storage system thermal management uses indirect liquid cooling to remove the heat generated by the normal operation of the battery to prevent the battery temperature from being too high and entering an uncontrollable thermal runaway stage. Of course, there are generally module-level fire protection, cluster-level fire protection, and system-level fire protection to deal with possible thermal runaway hazards.

[0004] It is worth noting that the above-mentioned methods of suppressing thermal runaway are usually through flame retardancy and lowering the temperature of the battery cell, which prevents the gasified electrolyte from contacting oxygen in the external path to prevent combustion or lowers the temperature of the battery cell to prevent the temperature from rising and causing more chemical reactions, thereby suppressing the evolution of thermal runaway. When a battery cell has thermal runaway, it is indeed possible to extinguish the open flame by flame retardancy or lowering the temperature of the battery cell, but the chemical reaction in the internal path of the battery cell is still ongoing, the temperature will still rise, and it will re-ignite after contact with oxygen, making it difficult to completely extinguish the thermal runaway of the lithium battery. Summary of the invention

[0005] Based on the above description, the present invention provides a liquid cooling system for suppressing thermal runaway of a battery cell and a battery cell module with an integrated liquid cooling system, so as to solve the problem in the related art that it is difficult to completely extinguish thermal runaway of a lithium battery.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] In a first aspect, the present application provides a liquid cooling system for suppressing thermal runaway of a battery cell, and the technical solution adopted is as follows:

[0008] A liquid cooling system for suppressing thermal runaway of a battery cell comprises two liquid cooling plates for being attached to opposite sides of a battery cell, side walls of the battery cell attached to the liquid cooling plates are provided with explosion-proof valves, the explosion-proof valves are connected to the liquid cooling plates, and when the explosion-proof valves rupture, a refrigerant channel in the liquid cooling plates is connected to the battery cell.

[0009] Preferably, a first throttling structure located between a water inlet and a water outlet is provided in the refrigerant channel of the liquid cooling plate. During the flow of the refrigerant medium from the water inlet to the water outlet, the flow resistance at the first throttling structure is the largest. When the explosion-proof valve connected to the liquid cooling plate is broken, the battery cell is connected to the refrigerant channel between the first throttling structure and the water inlet.

[0010] Preferably, a second throttling structure is provided in the refrigerant channel of the liquid cooling plate that is not provided with the first throttling structure, and when the explosion-proof valve connected to the liquid cooling plate is broken, the battery cell is connected to the refrigerant channel between the second throttling structure and the water outlet.

[0011] Preferably, the first throttling structure comprises a throttling plate, which is arranged in the coolant channel of the liquid cooling plate and makes the flow cross-section of the coolant channel minimum at the throttling plate.

[0012] Preferably, the liquid cooling plate is provided with a positioning hole connected to the refrigerant channel, and the explosion-proof valve is embedded in the positioning hole and sealedly connected to the liquid cooling plate.

[0013] In a second aspect, the present application provides a battery cell module with an integrated liquid cooling system, comprising:

[0014] A battery cell, wherein two opposite side walls of the battery cell are respectively provided with explosion-proof valves;

[0015] In the liquid cooling system for suppressing thermal runaway of a battery cell as described in the first aspect above, two liquid cooling plates are respectively attached to two sides of the battery cell on which the explosion-proof valve is provided, and the explosion-proof valve is connected to the liquid cooling plate, so that when the explosion-proof valve ruptures, the refrigerant channel in the liquid cooling plate and the battery cell are connected.

[0016] Preferably, a plurality of the battery cells are provided, and the plurality of the battery cells are all located between the two liquid cooling plates and attached to the liquid cooling plates.

[0017] Preferably, the explosion-proof valve is a one-way valve, and when the explosion-proof valve ruptures, it ruptures from the inside to the outside of the battery cell.

[0018] Preferably, the explosion-proof valve is arranged on two opposite side walls of the battery core that are perpendicular to the side walls on which the electrodes are arranged.

[0019] Compared with the prior art, the technical solution of the present application has at least the following beneficial technical effects:

[0020] 1. The liquid cooling system of the present application is provided with two liquid cooling plates attached to opposite sides of the battery cell, and the explosion-proof valve of the battery cell is connected to the liquid cooling plate. When the battery cell is working normally, the explosion-proof valve is not broken, so that the battery cell and the refrigerant channel in the liquid cooling plate are separated. The refrigerant in the liquid cooling plate takes away part of the heat generated by the battery cell during normal circulation, thereby cooling the battery cell and preventing the battery cell from being overheated. When the battery cell has thermal runaway, the electrolyte in the battery cell is vaporized, the pressure in the battery cell increases, causing the explosion-proof valve to rupture, and the refrigerant channel in the liquid cooling plate is connected to the battery cell, and the refrigerant enters the battery cell, changing the indirect heat exchange of the liquid cooling plate into direct heat exchange by immersion. While cooling the battery cell, the refrigerant dilutes the electrolyte to suppress chemical reactions, thereby suppressing thermal runaway of the battery cell from the source.

[0021] 2. The first throttling structure is set in the refrigerant channel of one of the liquid cooling plates. When the battery cell is in thermal runaway, the refrigerant channel between the first throttling structure and the water inlet is connected to the battery cell. Since the refrigerant in the liquid cooling plate has the largest flow resistance at the first throttling structure, and the explosion-proof valve provides another channel for the flow of the refrigerant, the refrigerant preferentially enters the battery cell through the explosion-proof valve, thereby increasing the refrigerant flow entering the battery cell through the explosion-proof valve, so as to fully dilute the electrolyte and cool the battery cell. In addition, in the liquid cooling plate with the first throttling structure, the refrigerant has a larger flow resistance at the first throttling structure, and the refrigerant has a larger pressure between the first throttling structure and the water inlet; while in the liquid cooling plate without the first throttling structure, the refrigerant has a smaller normal circulation flow resistance, and the refrigerant pressure in the liquid cooling plate is smaller. When the battery cell thermal runaway occurs, the two explosion-proof valves rupture, and the battery cell is connected to the two liquid cooling plates. Since the refrigerant pressures in the areas where the two liquid cooling plates and the battery cell are connected are different, a pressure difference is formed on both sides of the battery cell. Under the action of the pressure difference, part of the refrigerant in the liquid cooling plate with a first throttling structure enters the battery cell through the explosion-proof valve. After the refrigerant and the electrolyte are mixed and diluted, they enter the liquid cooling plate without the first throttling structure through another explosion-proof valve, mix with the refrigerant in the liquid cooling plate and circulate, thus forming a refrigerant flow channel consisting of the liquid cooling plate with the first throttling structure, the explosion-proof valve, the battery cell, the explosion-proof valve and the liquid cooling plate without the first throttling structure, so that the refrigerant can quickly mix with the electrolyte to dilute the electrolyte, quickly reduce the battery cell temperature and inhibit chemical reactions, thereby quickly inhibiting thermal runaway of the battery cell.

[0022] 3. By setting a second throttling structure in another liquid cooling plate, the flow resistance of the refrigerant at the second throttling structure is larger, and the pressure of the refrigerant between the second throttling structure and the water outlet is smaller. When the battery cell is in thermal runaway, the two explosion-proof valves rupture, the battery cell is connected to the two liquid cooling plates, and a greater pressure difference is further formed on both sides of the battery cell, thereby providing greater power for the refrigerant to flow in the refrigerant flow channel formed by the two liquid cooling plates, the two explosion-proof valves and the battery cell, ensuring that the refrigerant quickly mixes with the electrolyte to dilute the electrolyte, so as to achieve the purpose of quickly suppressing the thermal runaway of the battery cell.

[0023] 4. The battery cell module of the present application integrates the battery cell and the liquid cooling plate, which can quickly and effectively suppress the development of thermal runaway of the battery cell when thermal runaway occurs in the battery cell, thereby protecting the battery safety.

[0024] 5. The battery cell module of the present application protects multiple battery cells through two liquid cooling plates of a liquid cooling system. When a single battery cell is in thermal runaway, the further development of the battery cell in thermal runaway can be directionally suppressed, while other normally working battery cells are not affected, thereby reducing the maintenance cost of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a battery cell module of an integrated liquid cooling system provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of a battery cell in a battery cell module of an integrated liquid cooling system provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the structure of a liquid cooling system for suppressing thermal runaway of a battery cell provided by an embodiment of the present invention;

[0028] Figure 4 A schematic cross-sectional view of a battery cell module of an integrated liquid cooling system provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a throttle plate in a liquid cooling plate in a battery module of an integrated liquid cooling system provided in an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the refrigerant flow path of a cell module of the integrated liquid cooling system provided in an embodiment of the present invention when the cell is in thermal runaway.

[0031] Description of reference numerals:

[0032] 1. Battery cell; 2. Liquid cooling plate; 21. Refrigerant channel; 22. Positioning hole; 23. First throttling structure; 24. Second throttling structure; 25. Throttle plate; 26. Connecting pipe; 3. Explosion-proof valve. DETAILED DESCRIPTION

[0033] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0036] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0037] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0038] Reference Figure 1-6 As shown, an embodiment of the present application provides a battery cell module with an integrated liquid cooling system, which includes a battery cell 1 and a liquid cooling system for suppressing thermal runaway of the battery cell 1 .

[0039] Reference Figure 2 and Figure 4 As shown, explosion-proof valves 3 are provided on the two opposite side walls of the battery core 1, and the explosion-proof valves 3 are one-way valves. When the explosion-proof valves 3 rupture, they rupture from the inside to the outside of the battery core 1.

[0040] Reference Figure 1 and Figure 3-4As shown, the liquid cooling system for suppressing thermal runaway of the battery cell 1 includes two liquid cooling plates 2, and the two liquid cooling plates 2 are respectively attached to the two sides of the battery cell 1 provided with an explosion-proof valve 3, and the explosion-proof valve 3 is connected to the liquid cooling plate 2. When the explosion-proof valve 3 ruptures, the refrigerant channel 21 in the liquid cooling plate 2 is connected to the battery cell 1.

[0041] Reference Figure 3-4 As shown, specifically, a positioning hole 22 connected to the refrigerant channel 21 is provided on the side wall where the liquid cooling plate 2 and the battery cell 1 are attached, and the explosion-proof valve 3 is embedded in the positioning hole 22 and is sealed and connected to the liquid cooling plate 2. The explosion-proof valve 3 is embedded in the positioning hole 22, and the valve body of the explosion-proof valve 3 and the liquid cooling plate 2 are fixed and sealed to make the liquid cooling plate 2 sealed, and the diaphragm of the explosion-proof valve 3 separates the refrigerant channel 21 of the liquid cooling plate 2 from the battery cell 1. When the explosion-proof valve 3 is not broken, the refrigerant circulates normally in the liquid cooling plate 2.

[0042] When the battery cell 1 is working normally, the refrigerant in the liquid cooling plate 2 takes away part of the heat generated by the battery cell 1 during normal circulation, which plays a role in cooling the battery cell 1 and preventing the battery cell 1 from being overheated. When the battery cell 1 has thermal runaway, the electrolyte in the battery cell 1 is vaporized, the pressure in the battery cell 1 increases, and the explosion-proof valve 3 ruptures. The refrigerant channel 21 in the liquid cooling plate 2 is connected to the battery cell 1, and the refrigerant enters the battery cell 1, changing the indirect heat exchange of the liquid cooling plate 2 to direct immersion heat exchange. While cooling the battery cell 1, the refrigerant dilutes the electrolyte to inhibit the chemical reaction, thereby inhibiting the thermal runaway of the battery cell 1 from the source.

[0043] Reference Figure 4 As shown, when the thermal runaway explosion-proof valve 3 of the battery cell 1 ruptures, in order to increase the refrigerant flow rate entering the battery cell 1 through the explosion-proof valve 3, a first throttling structure 23 located between the water inlet and the water outlet is provided in the refrigerant channel 21 of a liquid cooling plate 2. During the flow of the refrigerant medium from the water inlet to the water outlet, the flow resistance at the first throttling structure 23 is the largest. When the explosion-proof valve 3 connected to the liquid cooling plate 2 is broken, the battery cell 1 is connected to the refrigerant channel 21 between the first throttling structure 23 and the water inlet.

[0044] Reference Figure 4 and Figure 6 As shown, since the flow resistance of the refrigerant through the first throttling structure 23 is relatively large, the refrigerant pressure in the refrigerant channel 21 between the first throttling structure 23 and the water inlet is relatively large. When the explosion-proof valve 3 is broken, the pressure in the battery cell 1 can be resisted to ensure that the refrigerant enters the battery cell 1 through the explosion-proof valve 3. In actual design, the flow resistance of the refrigerant through the first throttling structure 23 can be made greater than the flow resistance through the explosion-proof valve 3, and the refrigerant flow rate entering the battery cell 1 through the explosion-proof valve 3 is increased to fully dilute the electrolyte and cool the battery cell 1.

[0045] Reference Figure 6As shown, in the liquid cooling plate 2 provided with the first throttling structure 23, the flow resistance of the refrigerant at the first throttling structure 23 is relatively large, and the refrigerant has a relatively large pressure between the first throttling structure 23 and the water inlet; while in the liquid cooling plate 2 without the first throttling structure 23, the normal circulation flow resistance of the refrigerant is relatively small, and the refrigerant pressure in the liquid cooling plate 2 is relatively small. When the battery cell 1 is thermally runaway, the two explosion-proof valves 3 rupture, and the battery cell 1 is connected to the two liquid cooling plates 2. Since the refrigerant pressures in the areas where the two liquid cooling plates 2 and the battery cell 1 are connected are different, a pressure difference is formed on both sides of the battery cell 1. Under the action of the pressure difference, part of the refrigerant in the liquid cooling plate 2 provided with the first throttling structure 23 enters the battery cell 1 through the explosion-proof valve 3. After the refrigerant and the electrolyte are mixed and diluted, they enter the liquid cooling plate 2 without the first throttling structure 23 through another explosion-proof valve 3, and are mixed and circulated with the refrigerant in the liquid cooling plate 2, that is, a refrigerant flow channel is formed by the liquid cooling plate 2 provided with the first throttling structure 23, the explosion-proof valve 3, the battery cell 1, the explosion-proof valve 3 and the liquid cooling plate 2 without the first throttling structure 23, so that the refrigerant can quickly mix with the electrolyte to dilute the electrolyte, quickly reduce the temperature of the battery cell 1 and inhibit chemical reactions, thereby quickly inhibiting the thermal runaway of the battery cell 1.

[0046] Specifically, on the liquid cooling plate 2 provided with the first throttling structure 23 , the positioning hole 22 is connected to the refrigerant channel 21 between the first throttling structure 23 and the water inlet.

[0047] Reference Figure 4 As shown, in order to dilute the electrolyte faster, a second throttling structure 24 is provided in the refrigerant channel 21 of another liquid cooling plate 2 without the first throttling structure 23. When the explosion-proof valve 3 connected to the liquid cooling plate 2 is broken, the battery 1 is connected to the refrigerant channel 21 between the second throttling structure 24 and the water outlet. The flow resistance of the refrigerant at the second throttling structure 24 is large, and the pressure of the refrigerant between the second throttling structure 24 and the water outlet is small. When the battery 1 is in thermal runaway, the two explosion-proof valves 3 are broken, the battery 1 is connected to the two liquid cooling plates 2, and a greater pressure difference is further formed on both sides of the battery 1, thereby providing greater power for the refrigerant to circulate in the refrigerant flow channel formed by the two liquid cooling plates 2, the two explosion-proof valves 3 and the battery 1, ensuring that the refrigerant quickly mixes with the electrolyte to dilute the electrolyte, so as to achieve the purpose of quickly suppressing the thermal runaway of the battery 1. Correspondingly, the positioning hole 22 on the liquid cooling plate 2 is connected to the refrigerant channel 21 between the second throttling structure 24 and the water outlet.

[0048] Reference Figure 4-5As shown, the first throttling structure 23 includes a throttling plate 25, which is arranged in the coolant channel 21 of the liquid cooling plate 2 and minimizes the flow cross section of the coolant channel 21 at the throttling plate 25. Specifically, the throttling plate 25 can completely block the coolant channel 21, and at the same time, a throttling hole is opened on the throttling plate 25 to achieve the purpose of increasing the flow resistance. In this embodiment, a notch is set at one end of the throttling plate 25 to connect the coolant channels 21 on both sides of the throttling plate 25, so that the flow cross-sectional area of ​​the coolant channel 21 at the throttling plate 25 is reduced. The second throttling structure 24 is the same as the first throttling structure 23, and also uses the throttling plate 25, but the difference is that the position of the throttling plate 25 in the liquid cooling plate 2 is different.

[0049] Reference Figure 1 As shown, further, the battery cell 1 module includes multiple battery cells 1, and the multiple battery cells 1 are located between two liquid cooling plates 2 and attached to the liquid cooling plates 2. The multiple battery cells 1 are protected by two liquid cooling plates 2 of a liquid cooling system. When a single battery cell 1 is in thermal runaway, the further development of the battery cell 1 in thermal runaway can be directionally suppressed, and other normally working battery cells 1 are not affected, which can reduce the maintenance cost of the battery.

[0050] Reference Figure 1 As shown, in this embodiment, the explosion-proof valve 3 is arranged on the opposite side walls of the battery cell 1 that are perpendicular to the side walls on which the electrodes are arranged, and correspondingly, the two liquid cooling plates 2 are attached to the side walls of the battery cell 1. The two liquid cooling plates 2 are connected by two connecting pipes 26, and the connecting pipes 26 are provided with pipelines respectively connected to the refrigerant channels 21 in the two liquid cooling plates 2, and the connecting pipes 26 are provided with interfaces respectively connected to the two pipelines. Among them, the two pipelines connected to the refrigerant channel 21 of a liquid cooling plate 2 are respectively used as the water inlet pipeline and the water outlet pipeline, and the corresponding interfaces are the water inlet and the water outlet. Correspondingly, the first throttling structure 23 and the second throttling structure 24 are both located between the two connecting pipes 26.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid cooling system for suppressing thermal runaway of a battery cell, characterized in that: It comprises two liquid cooling plates (2) for being attached to opposite sides of a battery cell (1); the side walls of the battery cell (1) and the liquid cooling plates (2) being attached are provided with explosion-proof valves (3); the explosion-proof valves (3) are connected to the liquid cooling plates (2); and when the explosion-proof valves (3) are broken, the refrigerant channels (21) in the liquid cooling plates (2) are connected to the battery cell (1); A first throttling structure (23) located between a water inlet and a water outlet is provided in a refrigerant channel (21) of the liquid cooling plate (2); during the flow of the refrigerant from the water inlet to the water outlet, the flow resistance at the first throttling structure (23) is the largest; when the explosion-proof valve (3) connected to the liquid cooling plate (2) is broken, the battery cell (1) is connected to the refrigerant channel (21) between the first throttling structure (23) and the water inlet; A second throttling structure (24) is provided in the refrigerant channel (21) of the liquid cooling plate (2) that is not provided with the first throttling structure (23); when the explosion-proof valve (3) connected to the liquid cooling plate (2) is broken, the battery cell (1) is connected to the refrigerant channel (21) between the second throttling structure (24) and the water outlet.

2. The liquid cooling system for suppressing thermal runaway of a battery cell according to claim 1, characterized in that: The first throttling structure (23) comprises a throttling plate (25), which is arranged in the cooling medium channel (21) of the liquid cooling plate (2) and makes the flow cross section of the cooling medium channel (21) minimum at the throttling plate (25).

3. The liquid cooling system for suppressing thermal runaway of a battery cell according to claim 1, characterized in that: The liquid cooling plate (2) is provided with a positioning hole (22) connected to the cooling medium channel (21), and the explosion-proof valve (3) is embedded in the positioning hole (22) and is sealedly connected to the liquid cooling plate (2).

4. A battery cell module with an integrated liquid cooling system, characterized in that: include: A battery cell (1), wherein two opposite side walls of the battery cell (1) are respectively provided with explosion-proof valves (3); A liquid cooling system for suppressing thermal runaway of a battery cell as claimed in any one of claims 1 to 3, wherein two liquid cooling plates (2) are respectively attached to two sides of the battery cell (1) provided with the explosion-proof valve (3), the explosion-proof valve (3) is connected to the liquid cooling plate (2), and when the explosion-proof valve (3) is broken, the refrigerant channel (21) in the liquid cooling plate (2) is connected to the battery cell (1).

5. The battery cell module of the integrated liquid cooling system according to claim 4, characterized in that: A plurality of the battery cores (1) are provided, and the plurality of the battery cores (1) are all located between the two liquid cooling plates (2) and are bonded to the liquid cooling plates (2).

6. The battery cell module of the integrated liquid cooling system according to claim 4, characterized in that: The explosion-proof valve (3) is a one-way valve, and when the explosion-proof valve (3) ruptures, it ruptures from the inside of the battery core (1) to the outside.

7. The battery cell module of the integrated liquid cooling system according to claim 4, characterized in that: The explosion-proof valve (3) is arranged on two opposite side walls of the battery core (1) which are perpendicular to the side walls on which the electrodes are arranged.

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