Immersed battery cooling system

Abstract

The utility model discloses an immersed battery cooling system, and relates to the technical field of energy storage equipment. The battery pack comprises a battery module, a control system and a cooling system, the battery module is electrically connected with the control system and the cooling system, the battery module comprises a battery box, a battery cell and an auxiliary liquid spraying pipe, the battery box is of a sealed structure and is filled with cooling liquid, the battery cell is arranged in the battery box, and the auxiliary liquid spraying pipe is arranged on the side wall of the battery box. The battery cell is arranged in the battery box filled with the cooling liquid, the cooling liquid auxiliary spray pipe is arranged in the battery box to spray the cooling liquid from the position above the battery cell, and circulating cooling of the cooling liquid is carried out under the control of the control system, so that all-directional synchronous cooling of the battery cell can be realized; and the risk that the battery cell is on fire is avoided, and the use safety of the battery pack is greatly improved.

Description

Technical Field

[0001] This utility model relates to an immersion battery cooling system and belongs to the field of energy storage equipment technology. Background Technology

[0002] Battery thermal management systems are crucial to the safety of electrochemical energy storage systems. With the increasing energy density and discharge power of batteries, traditional heat dissipation solutions are no longer sufficient to meet current battery cooling requirements, thus impacting battery performance, lifespan, and safety.

[0003] Traditional cold plate liquid cooling technology has its limitations. Since the heat-generating part of the battery cell is mainly the tab, and the cooling plate of the plate liquid cooling system is at the bottom of the battery cell, it cannot directly cool the tab. At present, it is very difficult to make the liquid cooling plate adhere to the tab for cooling, which will affect the measurement of battery cell temperature and voltage. Therefore, most of them use air cooling structure for cooling. However, air cooling has uneven cooling, and it cannot ensure that all battery cells are controlled at the same temperature. In addition, the air cooling structure also has the risk of combustion in the event of a failure, and has lower safety. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies or shortcomings of existing technologies by providing an immersion battery cooling system. This system involves placing the battery cells inside a battery box filled with coolant and installing auxiliary coolant nozzles inside the battery box to spray coolant from above the cells. Under the control of a control system, the coolant circulates and cools the cells, achieving not only comprehensive and synchronous cooling of the cells but also eliminating the risk of cell fires and greatly improving the safety of battery pack use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a battery module 1, a control system 2, and a cooling system. The battery module 1 is electrically connected to the control system 2 and the cooling system. The battery module 1 includes a battery box 11, a battery cell 12, and an auxiliary spray pipe 13. The battery box 11 is a sealed structure and is filled with coolant. The battery cell 12 is disposed inside the battery box 11. The auxiliary spray pipe 13 is disposed on the side wall of the battery box 11 and is located above the battery cell 12.

[0006] Furthermore, the auxiliary spray pipe 13 includes a liquid guide pipe 131, a liquid inlet pipe 132, and a spray pipe 133. The liquid inlet pipe 132 is located at the rear side of the middle of the liquid guide pipe 131 and extends out of the battery box 11. Several spray pipes 133 are arranged side by side at the front end of the liquid guide pipe 131, and the opening of the spray pipe 133 is flush with the end face of the battery cell 12.

[0007] Furthermore, a liquid inlet check valve 14 is provided on the outside of the battery box 11, and the liquid inlet check valve 14 is connected to the liquid inlet pipe 132.

[0008] Furthermore, a liquid outlet pipe 15 is provided on the lower part of the side opposite to the liquid inlet pipe 132 of the battery box 11, and a liquid outlet check valve 16 is provided on the liquid outlet pipe 15.

[0009] Furthermore, a liquid level display window 17 is provided on one side of the outer wall of the battery box 11, and a liquid level gauge 18 is provided on the liquid level display window 17. The detection head of the liquid level gauge 18 extends into the battery box 11, and the liquid level display window 17, the liquid level gauge 18 and the control system 2 are electrically connected.

[0010] Furthermore, a thermometer 101 is also provided on one side of the outer wall of the battery box 11, and the thermometer 101 is electrically connected to the control system 2.

[0011] Furthermore, the cooling system includes a liquid constant temperature system 3, a liquid circulation pump 4, and a replenishment tank 5. The liquid constant temperature system 3, the liquid circulation pump 4, and the replenishment tank 5 are connected by pipelines. The replenishment tank 5 is connected to the outlet check valve 16, and the liquid circulation pump 4 is connected to the inlet check valve 14.

[0012] Furthermore, the cooling system also includes a flow meter 6, one end of which is connected to the liquid circulation pump 4, and the other end is connected to the inlet check valve 14.

[0013] Furthermore, the battery box 11 is also provided with a communication interface 102 on its exterior.

[0014] The working principle of this utility model is as follows: Several battery cells 12 are immersed in a battery box 11 filled with coolant. When the energy storage system is working, the coolant is cooled to a certain temperature in a liquid constant temperature system, and then pressurized and transmitted to the battery module 1 by the liquid circulation pump 4. The coolant enters the auxiliary spray pipe 13 through the inlet one-way valve 14 and is sprayed out from the spray pipe 133. The sprayed coolant flows over the top of the battery cells 12. Since there are gaps between the battery cells 12, some coolant will flow down along the gaps between the battery cells 12, while most of the coolant flows in the spray direction in the battery box 11 and circulates downwards, so that the six sides of the battery cells 12 are evenly cooled. The system maintains the flow of coolant, enabling effective and rapid cooling. The level gauge 18 and thermometer 19 monitor the working status of the coolant in the battery box 11. When the level drops or the coolant temperature rises, the control system activates the replenishment tank 5 to provide new coolant into the liquid constant temperature system 3, which reaches a certain temperature before entering the battery box 11. The original coolant in the battery box 11 is discharged from the outlet check valve 16 and circulated back into the replenishment tank 5. This circulation method ensures that the temperature inside the battery module 1 is maintained within the set range, improving the operational safety of the energy storage device.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by placing the battery cell in a battery box filled with coolant, and setting a coolant auxiliary nozzle in the battery box to spray coolant from above the battery cell, the coolant is circulated and cooled under the control of the control system. This not only achieves all-round synchronous cooling of the battery cell, but also eliminates the risk of battery cell fire, greatly improving the safety of battery pack use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the frame structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of battery module 1 in this utility model;

[0019] Figure 3 yes Figure 1 Sectional view along the AA direction;

[0020] Figure 4 This is a schematic diagram showing the cooperation state between the auxiliary spray pipe 13 and the battery cell 12 in this utility model.

[0021] Figure 5 This is a schematic diagram of the auxiliary spray pipe 13 in this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Battery module; 2. Control system; 3. Liquid constant temperature system; 4. Liquid circulation pump; 5. Liquid replenishment tank; 6. Flow meter; 11. Battery box; 12. Battery cell; 13. Auxiliary spray pipe; 14. Liquid inlet check valve; 15. Liquid outlet pipe; 16. Liquid outlet check valve; 17. Liquid level display window; 18. Liquid level gauge; 101. Thermometer; 102. Communication interface. Detailed Implementation

[0023] See Figures 1-5As shown, the technical solution adopted in this specific embodiment is as follows: It includes a battery module 1, a control system 2, and a cooling system. The battery module 1 is electrically connected to the control system 2 and the cooling system. The battery module 1 includes a battery box 11, battery cells 12, and an auxiliary spray pipe 13. The battery box 11 is a sealed structure and is filled with coolant. The battery cells 12 are disposed inside the battery box 11. The auxiliary spray pipe 13 is disposed on the side wall of the battery box 11 and is located above the battery cells 12. In this embodiment, the battery module, the control system, and the cooling system constitute an energy storage system. Several sets of battery modules are provided, and the battery module is mainly composed of a sealed battery box and several battery cells. The battery box is filled with coolant, and the battery cells are immersed in the coolant, thereby avoiding uneven cooling. Since they are immersed in the coolant, even if the battery cells malfunction, they cannot catch fire, thus preventing fires. Furthermore, since it is direct heat dissipation, the efficiency is higher and the energy consumption is lower.

[0024] In order to enable the coolant to circulate better within the battery box to cool the cells, an auxiliary spray pipe is also installed. External coolant is sprayed into the battery box from the auxiliary spray pipe, keeping the coolant flowing within the battery box and achieving uniform cooling of the six sides of the cells. This effectively improves the cooling effect and enhances the safety of energy storage equipment.

[0025] The control system includes a data transmission module and a control module, which can set specific coolant circulation modes and temperature control.

[0026] More specifically, the auxiliary spray pipe 13 includes a liquid guide pipe 131, a liquid inlet pipe 132, and spray pipes 133. The liquid inlet pipe 132 is located at the rear side of the middle of the liquid guide pipe 131 and extends out of the battery box 11. Several spray pipes 133 are arranged side by side at the front end of the liquid guide pipe 131, and the opening of the spray pipe 133 is flush with the end face of the battery cell 12. In this embodiment, the auxiliary spray pipe is a spray pipe structure, the liquid guide pipe is a hollow horizontal pipe, its front end is several spray pipes arranged side by side, and its rear end is the liquid inlet pipe. The coolant enters from the liquid inlet pipe and is distributed from the liquid guide pipe to each spray pipe to spray the battery cell surface for full coverage, thereby achieving stable circulation of the coolant.

[0027] More specifically, the battery box 11 is provided with an external liquid inlet check valve 14, which is connected to the liquid inlet pipe 132. By setting a check valve, the backflow of coolant during installation and maintenance can be prevented, thereby reducing coolant loss.

[0028] More specifically, the battery box 11 is provided with an outlet pipe 15 on the lower part of the side opposite to the inlet pipe 132. The outlet pipe 15 is provided with an outlet check valve 16. Similarly, the check valve on the outlet pipe can prevent the backflow of coolant during installation and maintenance, and reduce coolant loss.

[0029] More specifically, a liquid level display window 17 is provided on one side of the outer wall of the battery box 11, and a liquid level gauge 18 is provided on the liquid level display window 17. The detection head of the liquid level gauge 18 extends into the battery box 11. The liquid level display window 17, the liquid level gauge 18 and the control system 2 are electrically connected. By setting the liquid level gauge, the usage of coolant in the battery box can be monitored, and the specific data can be displayed through the liquid level display window. After the data is fed back to the control system, the control system determines whether to perform liquid replenishment circulation based on the set data to increase the amount of coolant retained.

[0030] More specifically, a thermometer 101 is also provided on one side of the outer wall of the battery box 11. The thermometer 101 is electrically connected to the control system 2. The thermometer monitors the temperature of the coolant in the battery box and feeds it back to the control system. The control system determines whether to start the circulation and the circulation speed, thereby accurately controlling the temperature of the coolant in the battery box.

[0031] More specifically, the cooling system includes a liquid constant temperature system 3, a liquid circulation pump 4, and a replenishment tank 5. The liquid constant temperature system 3, the liquid circulation pump 4, and the replenishment tank 5 are connected by pipelines. The replenishment tank 5 is connected to an outlet check valve 16, and the liquid circulation pump 4 is connected to an inlet check valve 14. In this embodiment, the cooling system consists of multiple parts. The liquid constant temperature system can control the temperature of the coolant, mainly for cooling. The coolant in the replenishment tank is re-temperature controlled in the liquid constant temperature system and then transferred to the battery box by the liquid circulation pump. At the same time, the coolant in the battery box will circulate back to the replenishment tank, thus forming a cycle and achieving precise control of the cell temperature.

[0032] More specifically, the cooling system also includes a flow meter 6, one end of which is connected to the liquid circulation pump 4 and the other end is connected to the inlet check valve 14. The flow meter detects the flow rate of the coolant, thereby enabling the control system to accurately control the circulation speed of the coolant and achieve precise constant temperature.

[0033] More specifically, the battery box 11 is also provided with a communication interface 102 on the outside. The communication interface is connected to the control system to realize the control system's control over the battery cells and other components.

[0034] The working principle of this utility model is as follows: Several battery cells 12 are immersed in a battery box 11 filled with coolant. When the energy storage system is working, the coolant is cooled to a certain temperature in a liquid constant temperature system, and then pressurized and transmitted to the battery module 1 by the liquid circulation pump 4. The coolant enters the auxiliary spray pipe 13 through the inlet one-way valve 14 and is sprayed out from the spray pipe 133. The sprayed coolant flows over the top of the battery cells 12. Since there are gaps between the battery cells 12, some coolant will flow down along the gaps between the battery cells 12, while most of the coolant flows in the spray direction in the battery box 11 and circulates downwards, so that the six sides of the battery cells 12 are evenly cooled. The system maintains the flow of coolant, enabling effective and rapid cooling. The level gauge 18 and thermometer 19 monitor the working status of the coolant in the battery box 11. When the level drops or the coolant temperature rises, the control system activates the replenishment tank 5 to provide new coolant into the liquid constant temperature system 3, which reaches a certain temperature before entering the battery box 11. The original coolant in the battery box 11 is discharged from the outlet check valve 16 and circulated back into the replenishment tank 5. This circulation method ensures that the temperature inside the battery module 1 is maintained within the set range, improving the operational safety of the energy storage device.

[0035] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An immersion battery cooling system, characterized by: It includes battery module (1), control system (2), cooling system, battery module (1) and control system (2), cooling system electric connection, the battery module (1) includes battery box (11), electric core (12), auxiliary liquid injection pipe (13), battery box (11) is sealed structure, it is filled with cooling liquid, electric core (12) is arranged in battery box (11), auxiliary liquid injection pipe (13) is arranged in the side wall of battery box (11), and auxiliary liquid injection pipe (13) is located above electric core (12).

2. The submersion battery cooling system of claim 1, wherein: The auxiliary liquid injection pipe (13) includes liquid guide pipe (131), liquid inlet pipe (132), spray pipe (133), the liquid inlet pipe (132) is arranged in the rear side of the middle part of the liquid guide pipe (131) and passes out battery box (11), a plurality of spray pipes (133) are arranged in parallel in the front end of the liquid guide pipe (131), and the opening of the spray pipe (133) is flush with the end surface of the electric core (12).

3. The submersion battery cooling system of claim 1, wherein: The battery box (11) is provided with a liquid inlet check valve (14) outside, and the liquid inlet check valve (14) is connected with the liquid inlet pipe (132).

4. The submersion battery cooling system of claim 1, wherein: The battery box (11) and the liquid inlet pipe (132) are provided with a liquid outlet pipe (15) on the opposite side of the lower part, and the liquid outlet pipe (15) is provided with a liquid outlet check valve (16).

5. The submersion battery cooling system of claim 1, wherein: The outer wall of the battery box (11) is provided with a liquid level display window (17) on one side, and a liquid level meter (18) is arranged on the liquid level display window (17), the detection head of the liquid level meter (18) extends into the battery box (11), and the liquid level display window (17) and the liquid level meter (18) are electrically connected with the control system (2).

6. The submersion battery cooling system of claim 1, wherein: The outer wall of the battery box (11) is further provided with a thermometer (101) on one side, and the thermometer (101) is electrically connected with the control system (2).

7. The submersion battery cooling system of claim 1, wherein: The cooling system includes liquid constant temperature system (3), liquid circulating pump (4), liquid supplement tank (5), liquid constant temperature system (3), liquid circulating pump (4), liquid supplement tank (5) are connected through pipeline, the liquid supplement tank (5) is connected with the liquid outlet check valve (16), and the liquid circulating pump (4) is connected with the liquid inlet check valve (14).

8. The submersion battery cooling system of claim 1, wherein: The cooling system further includes a flow meter (6), one end of the flow meter (6) is connected with the liquid circulating pump (4), and the other end is connected with the liquid inlet check valve (14).

9. The submersion battery cooling system of claim 1, wherein: The battery box (11) is further provided with a communication interface (102) outside.

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