Lithium battery module liquid temperature control device and lithium battery cabinet

Abstract

The utility model discloses a lithium battery module liquid temperature control device and a lithium battery cabinet, the lithium battery module liquid temperature control device comprises a liquid inlet pipe, a battery cell module and an oil storage tank, and the battery cell module comprises a battery cell cabin and a transfer cabin which are communicated with each other; the battery cell module is arranged above the oil storage tank, the oil storage tank is communicated with a battery cell cabin of the battery cell module from bottom to top through a liquid inlet pipe, and a transfer cabin of the battery cell module is communicated with the oil storage tank from top to bottom through a reflux inlet; liquid in the oil storage tank sequentially flows to the battery cell cabin and the transfer cabin and then flows to the oil storage tank from top to bottom through the reflux inlet; and the priority of the liquid in the battery cell cabin passing through the liquid drainage port is greater than the priority of the liquid passing through the overflow dam port. According to the lithium ion battery module, the flowing efficiency of the liquid can be improved, reasonable flowing of the liquid required by cell temperature control can be independently completed in one lithium battery module, forward circulation or reverse circulation of the liquid can be completed, and then the spontaneous combustion risk of the lithium ion battery is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery energy storage, and in particular to a lithium battery module liquid temperature control device and a lithium battery cabinet. Background Art

[0002] In the field of lithium battery energy storage, lithium-ion battery energy storage technology has developed rapidly in recent years due to its high energy density and long cycle life. However, in the field of communication base stations and wireless base stations, which have strict requirements on safety performance, the inherent risk of spontaneous combustion of lithium-ion batteries has become the main obstacle to their widespread application. In recent years, although lithium-ion batteries for outdoor scenes have been recognized by the market, indoor communication rooms still rely on traditional lead-acid batteries for safety reasons, which limits the energy efficiency of communication infrastructure.

[0003] The key to solving the safety issues of lithium-ion batteries is to reduce the risk of spontaneous combustion by controlling the temperature of lithium-ion batteries. However, existing lithium battery cabinets are mainly customized and cannot meet the needs of small and medium-sized scenarios, such as small access rooms and aggregation rooms, nor can they meet the needs of integrated scenarios, such as minimalist base station integrated cabinets and outdoor broadband integrated cabinets; therefore, the industry needs to design a technical solution for lithium battery module liquid temperature control to improve the flow efficiency of the liquid and achieve independent completion of battery cell temperature control, thereby matching the needs of small and medium-sized scenarios or integrated scenarios. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to design a lithium battery module liquid temperature control device that can improve the flow efficiency of the liquid, ensure that the reasonable flow of the liquid required for the temperature control of the battery cell can be independently completed inside a lithium battery module, and complete the forward circulation or reverse circulation of the liquid, thereby significantly reducing the risk of spontaneous combustion of the lithium-ion battery.

[0005] In the first aspect, the embodiment of the utility model proposes a lithium battery module liquid temperature control device, the lithium battery module liquid temperature control device comprises: a liquid inlet pipe, a battery cell module, and an oil storage tank, the battery cell module comprises a battery cell compartment and a transfer compartment that are interconnected; the battery cell module is arranged above the oil storage tank, the oil storage tank and the battery cell compartment of the battery cell module are connected from bottom to top through the liquid inlet pipe, the battery cell compartment of the battery cell module and the transfer compartment of the battery cell module are connected through a liquid discharge port and an overflow dam port, and the transfer compartment of the battery cell module and the oil storage tank are connected from top to bottom through a reflux port; the liquid in the oil storage tank flows to the battery cell compartment and the transfer compartment in turn, and then flows to the oil storage tank from top to bottom through the reflux port; the liquid discharge port is arranged below the overflow dam port, and the priority of the liquid in the battery cell compartment passing through the liquid discharge port is greater than the priority of the liquid passing through the overflow dam port.

[0006] In the prior art, once the chip needs to be immersed in liquid, the first pipe is responsible for the flow of liquid in, and the second pipe is responsible for the flow of liquid out. Compared with the prior art, the present application has improved and optimized the liquid temperature control solution. When the battery cells in the battery compartment need to be immersed, the submersible pump drives the liquid into the battery compartment, and at the same time a certain amount of liquid will flow out from the small drain port at the bottom. However, relative to the liquid flow entering the battery compartment, the flow of liquid lost from the small drain port only accounts for a very small part of the entire liquid inlet flow, for example, a typical value is about ten percent, so the battery compartment can still be quickly filled with liquid. Once the liquid is higher than the overflow dam above the battery compartment, most of the liquid will overflow from the overflow dam and flow back to the liquid tank.

[0007] Next, the liquid flowing out of the small drain port merges with the liquid flowing out of the overflow dam port and flows back into the liquid storage tank. Finally, when the battery cell immersion demand in the battery cell compartment ends, the submersible pump stops working, and all the liquid in the battery cell compartment automatically flows back into the oil storage tank from the small drain port from top to bottom.

[0008] In the battery cell compartment, the viscosity of the insulating liquid is greater than that of water, so the liquid has poor fluidity, which also means that the temperature balance of the liquid in the horizontal and vertical directions will deteriorate. If the liquid is to be injected from the rear end opening of the device or module, and the liquid is pumped to the front end of the module by the driving force of a submersible pump, the resistance is very large, and it is difficult to meet the requirements of balanced heat absorption and cooling of the liquid. Therefore, in order to improve the balance of the liquid in the battery cell compartment and increase the heat absorption effect of the liquid, the present application arranges the liquid inlet and the liquid discharge port at different horizontal positions, such as one liquid inlet at the front end of the module and at least one other liquid discharge port at the rear end of the module; they can also be arranged at different vertical heights, such as the liquid inlet channel at the bottom and the liquid discharge channel at the top, as shown in the figure. Figure 1 , Figure 2 , Figure 3 As shown, Figure 1 correspond Figure 2 In the battery module part, Figure 2 and Figure 3 The oil storage tank and submersible pump are shown in cross-section.

[0009] In one embodiment, the lithium battery module liquid temperature control device further includes a submersible pump, which is disposed in the oil storage tank. The submersible pump drives the liquid in the liquid inlet pipe to flow unidirectionally from bottom to top, and the liquid inlet pipe sequentially passes through the oil storage tank, the transfer cabin, and the battery compartment, so that the liquid in the oil storage tank flows directly to the battery compartment. The liquid in the oil storage tank flows directly to the battery compartment, that is, the liquid in the oil storage tank flows directly to the battery compartment in a sealed manner without passing through the transfer cabin.

[0010] In one embodiment, the liquid inlet pipe of the lithium battery module liquid temperature control device passes through the oil storage tank and the transfer cabin in sequence, and then enters the battery cell cabin through the overflow dam.

[0011] In one embodiment, the cell compartment is provided with a plurality of cells, and the liquid in the oil storage tank flows to the cell compartment and the transfer compartment in sequence to immerse the plurality of cells in the cell compartment, and after immersing the plurality of cells, the liquid flows from top to bottom through the reflux port to the oil storage tank to empty the liquid in the cell compartment. The liquid may be a low-temperature liquid, which is used to cool the plurality of cells by immersion.

[0012] In one embodiment, the cross-sectional area of ​​the overflow dam outlet is larger than the cross-sectional area of ​​the return outlet, and the cross-sectional area of ​​the return outlet is larger than the cross-sectional area of ​​the drainage outlet.

[0013] In one embodiment, the lithium battery module liquid temperature control device also includes a plurality of liquid inlet branch pipes, and the plurality of liquid inlet branch pipes are all connected to the liquid inlet pipe. The plurality of battery cells are arranged in an array in the battery cell compartment, and the plurality of liquid inlet branch pipes pass through gaps formed by the plurality of battery cells arranged in an array, so as to reduce the temperature of the plurality of battery cells through the liquid in the plurality of liquid inlet branch pipes.

[0014] In the above scheme, in order to ensure that the liquid is not hindered by the shape of the battery cell shell during the flow of the battery cell compartment, and to ensure that any battery cell can receive enough liquid entering the compartment, a liquid inlet branch pipe is arranged in each aisle where the battery cells are arranged, so as to ensure that when any battery cell overheats, there is enough low-temperature liquid flowing through the battery cell to take away the heat. There are two ways to implement the layout structure of the liquid inlet branch pipe, such as Figure 4 and Figure 5 In the top view shown, the openings of the liquid inlet branch pipes of the two methods are both located at the far end of the device, that is, the front end of the device; Figure 4 The rear end of the battery compartment is divided into multiple liquid inlet branch pipes. Figure 5 The rear end of the battery compartment is divided into multiple liquid inlet branch pipes.

[0015] In one embodiment, the battery module further includes a BMS cabin, and the BMS cabin is connected to the battery cabin, and the volume of the BMS cabin is smaller than the volume of the battery cabin. In one embodiment, the liquid temperature control device of the lithium battery module further includes two liquid reflux channels, and the two liquid reflux channels are arranged in close contact with the battery cabin of the battery module, so that liquid can flow into the rear end of the battery cabin and reflux liquid on both sides of the front end of the battery cabin. Among them, under the premise that the high-temperature liquid reflux channels on both sides of the device are isolated from the liquid immersion area of ​​the battery cabin, liquid can flow into the rear end of the battery cabin and reflux liquid on both sides of the front end of the battery cabin. Figure 6It is a liquid circulation structure with dispersed liquid inlet at the rear end and concentrated liquid return at the front end in the battery compartment. Figure 7 It is a liquid circulation architecture with dispersed liquid inlet at the rear end of the battery cell compartment, reflux channels on both sides, and centralized liquid return at the rear end.

[0016] In the second aspect, the embodiment of the utility model further proposes a lithium battery cabinet, which includes the lithium battery module liquid temperature control device as described in the first aspect. Furthermore, the lithium battery cabinet can improve the flow efficiency of the liquid, ensure that the reasonable flow of the liquid required for the temperature control of the battery cell can be independently completed inside a lithium battery module, and the forward or reverse circulation of the liquid can be completed, thereby significantly reducing the risk of spontaneous combustion of lithium-ion batteries.

[0017] The beneficial effects of the scheme described in the present application include: first, by arranging multiple drainage ports in the battery cell compartment to discharge liquid in different proportions, the overflow dam port acts as a large port, and the small drainage port at the bottom acts as a small port, so as to achieve the dual goals of liquid immersion in the battery cell and automatic liquid drainage; second, the overflow dam port and the drainage port in the battery cell compartment are arranged at different horizontal positions and different vertical heights, which solves the problem of high viscosity and difficult flow of insulating liquid; third, a liquid inlet branch pipe is arranged in each aisle where the battery cells are arranged, and the outlet of the liquid inlet branch pipe is at the far end, i.e., the front end, of the battery cell compartment to ensure that when any battery cell overheats, there is enough low-temperature liquid flowing through the battery cell to take away the heat; fourth, a high-temperature liquid reflux channel is arranged on both sides of the battery cell module, i.e., outside the battery compartment, to solve the contradiction between the unidirectional flow of liquid in the battery compartment and the position of the liquid inlet / return port, both of which are located at the rear end of the device.

[0018] In summary, in the field of lithium battery energy storage, lithium-ion battery energy storage technology has developed rapidly in recent years due to its high energy density and long cycle life. However, in the field of communication base stations and wireless base stations with strict requirements on safety performance, the inherent risk of spontaneous combustion of lithium-ion batteries has become the main obstacle to its widespread application. In recent years, although lithium-ion batteries for outdoor scenes have been recognized by the market, communication rooms in indoor scenes still rely on traditional lead-acid batteries for safety reasons, which limits the energy efficiency of communication infrastructure. The key to solving the safety factors of lithium-ion batteries is to reduce the risk of spontaneous combustion by controlling the temperature of lithium-ion batteries. However, the existing lithium battery cabinets are mainly customized and cannot meet the needs of small and medium-sized scenes, such as small access rooms and aggregation rooms, nor can they meet the needs of integrated scenes, such as minimalist base station integrated cabinets and outdoor broadband integrated cabinets; this application solves the above problems, and the solution can improve the flow efficiency of the liquid, ensure that within a lithium battery module, the reasonable flow of the liquid required for the temperature control of the battery cell can be independently completed, and the forward or reverse circulation of the liquid can be completed, thereby significantly reducing the risk of spontaneous combustion of lithium-ion batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A three-dimensional diagram of the liquid temperature control device for a lithium battery module proposed in an embodiment of the utility model.

[0021] Figure 2 A structural diagram of a lithium battery module liquid temperature control device proposed in an embodiment of the utility model.

[0022] Figure 3 This is another structural diagram of the lithium battery module liquid temperature control device proposed in an embodiment of the utility model.

[0023] Figure 4 This is a first partial diagram of the lithium battery module liquid temperature control device proposed in an embodiment of the utility model.

[0024] Figure 5 This is a second partial view of the liquid temperature control device for a lithium battery module proposed in an embodiment of the utility model.

[0025] Figure 6 This is a third partial view of the liquid temperature control device for a lithium battery module proposed in an embodiment of the utility model.

[0026] Figure 7 This is a fourth partial view of the lithium battery module liquid temperature control device proposed in an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Similar component numbers in the drawings represent similar components. Obviously, the embodiments to be described below are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] It should be understood that the terms used in the utility model embodiment description are only for the purpose of describing specific embodiments and are not intended to limit the utility model embodiment. As used in the utility model embodiment description and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0029] Example

[0030] See also Figures 1 to 7 , is a lithium battery module liquid temperature control device proposed in an embodiment of the utility model, the lithium battery module liquid temperature control device comprises: a liquid inlet pipe 10, a battery module 20, and an oil storage tank 30, the battery module 20 comprises a battery compartment 21 and a transfer compartment 22 which are interconnected; the battery module 20 is arranged above the oil storage tank 30, the oil storage tank 30 and the battery compartment 21 of the battery module 20 are connected from bottom to top through the liquid inlet pipe 10, the battery compartment 21 of the battery module 20 and the transfer compartment of the battery module 20 The transfer compartment 22 of the battery module 20 is connected with the oil storage tank 30 from top to bottom through the reflux port 1b; the liquid in the oil storage tank 30 flows to the battery compartment 21 and the transfer compartment 22 in turn, and then flows to the oil storage tank 30 from top to bottom through the reflux port 1b; the drain port 1c is arranged below the overflow dam port 1a, and the priority of the liquid in the battery compartment 21 passing through the drain port 1c is greater than the priority of the liquid passing through the overflow dam port 1a.

[0031] Furthermore, the lithium battery module liquid temperature control device also includes a submersible pump 11, which is disposed in the oil storage tank 30. The submersible pump 11 drives the liquid in the liquid inlet pipe 10 to flow unidirectionally from bottom to top. The liquid inlet pipe 10 sequentially passes through the oil storage tank 30, the transfer cabin 22, and the battery compartment 21, so that the liquid in the oil storage tank 30 flows directly to the battery compartment 21. Furthermore, after the liquid inlet pipe 10 of the lithium battery module liquid temperature control device sequentially passes through the oil storage tank 30 and the transfer cabin 22, it enters the battery compartment 21 through the overflow dam port 1a.

[0032] Furthermore, the cell compartment 21 of the lithium battery module liquid temperature control device is provided with a plurality of cells, and the liquid in the oil storage tank 30 flows to the cell compartment 21 and the transfer compartment 22 in sequence to immerse the plurality of cells in the cell compartment 21. After immersing the plurality of cells, the liquid flows from top to bottom through the reflux port 1b to the oil storage tank 30 to drain the liquid from the cell compartment 21. Furthermore, the cross-sectional area of ​​the overflow dam port 1a of the lithium battery module liquid temperature control device is greater than the cross-sectional area of ​​the reflux port 1b, and the cross-sectional area of ​​the reflux port 1b is greater than the cross-sectional area of ​​the drain port 1c.

[0033] Furthermore, the liquid temperature control device for the lithium battery module also includes a plurality of liquid inlet branch pipes, which are all connected to the liquid inlet pipe 10, and the plurality of battery cells are arranged in an array in the battery cell compartment 21. The plurality of liquid inlet branch pipes pass through the gaps formed by the plurality of battery cells arranged in an array, so as to reduce the temperature of the plurality of battery cells through the liquid in the plurality of liquid inlet branch pipes. Furthermore, the battery cell module 20 of the liquid temperature control device for the lithium battery module also includes a BMS compartment, which is connected to the battery cell compartment 21, and the volume of the BMS compartment is smaller than the volume of the battery cell compartment 21. Furthermore, the liquid temperature control device for the lithium battery module also includes two liquid reflux channels, which are arranged in contact with the battery cell compartment 21 of the battery cell module 20, so as to allow liquid to flow into the rear end of the battery cell compartment 21 and to reflux liquid on both sides of the front end of the battery cell compartment 21.

[0034] In one embodiment, the utility model also provides a lithium battery cabinet, which includes a lithium battery module liquid temperature control device as described in any of the above embodiments. Further, the lithium battery cabinet can improve the flow efficiency of the liquid, ensure that the reasonable flow of the liquid required for the temperature control of the battery cell can be independently completed inside a lithium battery module, and the forward or reverse circulation of the liquid can be completed, thereby significantly reducing the risk of spontaneous combustion of lithium-ion batteries.

[0035] In summary, in the field of lithium battery energy storage, lithium-ion battery energy storage technology has developed rapidly in recent years due to its high energy density and long cycle life. However, in the field of communication base stations and wireless base stations with strict requirements on safety performance, the inherent risk of spontaneous combustion of lithium-ion batteries has become the main obstacle to its widespread application. In recent years, although lithium-ion batteries for outdoor scenes have been recognized by the market, communication rooms in indoor scenes still rely on traditional lead-acid batteries for safety reasons, which limits the energy efficiency of communication infrastructure. The key to solving the safety factors of lithium-ion batteries is to reduce the risk of spontaneous combustion by controlling the temperature of lithium-ion batteries. However, the existing lithium battery cabinets are mainly customized and cannot meet the needs of small and medium-sized scenes, such as small access rooms and aggregation rooms, nor can they meet the needs of integrated scenes, such as minimalist base station integrated cabinets and outdoor broadband integrated cabinets; this application solves the above problems, and the solution can improve the flow efficiency of the liquid, ensure that within a lithium battery module, the reasonable flow of the liquid required for the temperature control of the battery cell can be independently completed, and the forward or reverse circulation of the liquid can be completed, thereby significantly reducing the risk of spontaneous combustion of lithium-ion batteries.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

[0042] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A liquid temperature control device for a lithium battery module, characterized in that: The lithium battery module liquid temperature control device comprises: A liquid inlet pipe, a battery cell module, and an oil storage tank, wherein the battery cell module comprises a battery cell compartment and a transfer compartment that are interconnected; the battery cell module is arranged above the oil storage tank, the oil storage tank and the battery cell compartment of the battery cell module are connected from bottom to top through the liquid inlet pipe, the battery cell compartment of the battery cell module is connected to the transfer compartment of the battery cell module through a liquid discharge port and an overflow dam port, and the transfer compartment of the battery cell module is connected to the oil storage tank from top to bottom through a reflux port; The liquid in the oil storage tank flows to the battery compartment and the transfer compartment in sequence, and then flows from top to bottom to the oil storage tank through the reflux port; the drain port is arranged below the overflow dam port, and the priority of the liquid in the battery compartment passing through the drain port is higher than the priority of the liquid passing through the overflow dam port.

2. The lithium battery module liquid temperature control device according to claim 1, characterized in that: The lithium battery module liquid temperature control device also includes a submersible pump, which is arranged in the oil storage tank. The submersible pump drives the liquid in the liquid inlet pipe to flow unidirectionally from bottom to top. The liquid inlet pipe passes through the oil storage tank, the transfer cabin and the battery cell cabin in sequence, so that the liquid in the oil storage tank flows directly to the battery cell cabin.

3. The lithium battery module liquid temperature control device according to claim 2, characterized in that: The liquid inlet pipe of the lithium battery module liquid temperature control device passes through the oil storage tank and the transfer cabin in sequence, and then enters the battery cell cabin through the overflow dam.

4. The lithium battery module liquid temperature control device according to claim 1, characterized in that: A plurality of battery cells are arranged inside the battery cell compartment, and the liquid in the oil storage tank flows to the battery cell compartment and the transfer compartment in sequence to immerse the plurality of battery cells in the battery cell compartment. After immersing the plurality of battery cells, the liquid flows from top to bottom through the reflux port to the oil storage tank to empty the liquid in the battery cell compartment.

5. The lithium battery module liquid temperature control device according to claim 4, characterized in that: The cross-sectional area of ​​the overflow dam outlet is larger than the cross-sectional area of ​​the return outlet, and the cross-sectional area of ​​the return outlet is larger than the cross-sectional area of ​​the drainage outlet.

6. The lithium battery module liquid temperature control device according to claim 5, characterized in that: The lithium battery module liquid temperature control device also includes a plurality of liquid inlet branch pipes, which are all connected to the liquid inlet pipe. The plurality of battery cells are arranged in an array in the battery cell compartment, and the plurality of liquid inlet branch pipes pass through gaps formed by the plurality of battery cells arranged in an array, so as to reduce the temperature of the plurality of battery cells through the liquid in the plurality of liquid inlet branch pipes.

7. The lithium battery module liquid temperature control device according to claim 6, characterized in that: The battery cell module further includes a BMS compartment, which is connected to the battery cell compartment, and the volume of the BMS compartment is smaller than the volume of the battery cell compartment.

8. The lithium battery module liquid temperature control device according to claim 7, characterized in that: The lithium battery module liquid temperature control device also includes two liquid reflux channels, which are arranged in close contact with the battery compartment of the battery module to achieve liquid flowing into the rear end of the battery compartment and reflux liquid on both sides of the front end of the battery compartment.

9. A lithium battery cabinet, characterized in that: The lithium battery cabinet includes a lithium battery module liquid temperature control device as described in any one of claims 1 to 8.

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