Vertical liquid cooling unit with liquid supplementing device and immersed energy storage system

Abstract

The utility model provides a vertical liquid cooling unit with liquid supplementing device, including unit box body, refrigeration unit, cooling unit, liquid supplementing unit and electric control unit, unit box body has a cavity, refrigeration unit includes heat exchanger setting in the cavity, cooling unit includes the cooling pipeline intercommunication with heat exchanger, liquid supplementing unit includes the liquid supplementing tank intercommunication with cooling pipeline, and electric control unit is used for controlling the cooperation of refrigeration unit, cooling unit, liquid supplementing unit between the coordinated action. The utility model also provides an immersion type energy storage system.

Description

Technical Field

[0001] This utility model relates to the field of energy storage liquid cooling equipment technology, and in particular to a vertical liquid cooling unit with a liquid replenishment device and an immersion energy storage system. Background Technology

[0002] Currently, with the rapid development of modern technology, liquid cooling units are widely used in industries such as energy storage, artificial intelligence, and cloud computing. Liquid cooling typically involves completely immersing energy storage batteries or servers in coolant, utilizing the high specific heat capacity of the coolant to achieve efficient heat transfer and dissipation. Compared to air cooling, it can significantly improve heat dissipation efficiency, effectively reduce equipment operating temperature, and thus improve equipment stability and service life.

[0003] However, current conventional submerged liquid chiller units still exhibit several problems that urgently need to be addressed in practical applications. Firstly, in existing technologies, liquid chiller units are mostly floor-mounted, resulting in complex structures and large unit sizes that occupy significant space, limiting their application in space-constrained environments. Secondly, if a storage battery or server experiences thermal runaway due to an accident, the coolant in the liquid chiller unit may be insufficient for fire suppression, potentially leading to a thermal chain reaction. Furthermore, existing submerged liquid chiller units typically rely on external replenishment systems to maintain coolant levels and circulation. This not only makes the entire cooling system structure extremely complex but also significantly increases the difficulty and cost of installation, commissioning, and daily maintenance. The increased number of external replenishment pipes and equipment means a substantial rise in the potential risk of leakage. If a leak occurs, the coolant may cause serious damage to surrounding equipment, triggering short circuits and other malfunctions, thereby affecting the normal operation of the entire system and causing significant economic losses. Utility Model Content

[0004] The purpose of this invention is to provide a vertical liquid-cooled unit and an immersion energy storage system with a liquid replenishment device, aiming to solve or at least partially solve the shortcomings of the aforementioned background technology. The liquid-cooled unit has an integrated liquid replenishment device, realizing integrated temperature control and fire protection. This not only avoids reliance on external liquid replenishment equipment, effectively simplifies the structure of the unit, reduces installation and maintenance difficulty and cost, and reduces the risk of leakage, but also enhances the thermal runaway response capability of the energy storage system and significantly improves the reliability and stability of the energy storage system operation.

[0005] This utility model provides a vertical liquid-cooled unit with a liquid replenishment device, including a unit housing, a refrigeration unit, a cooling unit, a liquid replenishment unit, and an electrical control unit. The unit housing has a cavity; the refrigeration unit includes a heat exchanger disposed in the cavity; the cooling unit includes cooling pipes connected to the heat exchanger; the liquid replenishment unit includes a liquid replenishment tank connected to the cooling pipes; and the electrical control unit is used to control the coordinated operation between the refrigeration unit, the cooling unit, and the liquid replenishment unit.

[0006] Furthermore, the cooling pipeline is equipped with an inlet pipe and an outlet pipe, which are connected to the heat exchanger respectively.

[0007] Furthermore, the replenishment unit also includes a replenishment pipeline, which includes a replenishment pipe and a return pipe. The replenishment pipe connects the replenishment tank to the inlet pipe, and the return pipe connects the replenishment tank to the outlet pipe.

[0008] Furthermore, the replenishment pipe and the return pipe are respectively equipped with a first solenoid valve and a second solenoid valve, which are electrically connected to the solenoid control unit.

[0009] Furthermore, the liquid replenishment unit also includes a liquid inlet pipe, one end of which is connected to the liquid replenishment pipe, and the connection between the liquid inlet pipe and the liquid replenishment pipe is located between the first solenoid valve and the liquid inlet pipe.

[0010] Furthermore, a liquid filling port is provided at the other end of the liquid filling pipe, and a first switch valve is provided at the liquid filling port.

[0011] Furthermore, a level sensor is installed inside the coolant tank to detect the coolant level.

[0012] Furthermore, the replenishment tank is equipped with a drain pipe, and a second switch valve is installed on the drain pipe.

[0013] Furthermore, it also includes a mounting bracket connected to the unit housing, with the mounting bracket and unit housing vertically arranged, and a replenishment tank mounted on the mounting bracket. This utility model also provides an immersion energy storage system, including an energy storage cabinet containing a battery pack immersed in coolant and a temperature sensor for monitoring the temperature inside the energy storage cabinet. It also includes the aforementioned vertical liquid-cooled unit with a replenishment device, with cooling pipes connected to the energy storage cabinet via delivery pipes, and the temperature sensor electrically connected to the electronic control unit.

[0014] The vertical liquid-cooled unit with a liquid replenishment device provided by this utility model connects the cooling pipeline through the liquid replenishment tank, so that the liquid replenishment unit and the liquid-cooled unit are integrated, realizing the integration of temperature control and fire protection. This not only avoids dependence on external liquid replenishment equipment, but also effectively simplifies the structure of the liquid-cooled unit, reduces the difficulty and cost of installation and maintenance, and reduces the risk of leakage.

[0015] The immersion energy storage system provided by this utility model achieves efficient cooling of the energy storage cabinet through the coordinated heat exchange of the refrigeration cycle loop and the cooling cycle loop, thereby enhancing the thermal runaway response capability of the immersion energy storage system and its operational reliability and stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a vertical liquid cooling unit with a liquid replenishment device according to the present invention.

[0018] Figure 2 This is a front view of a vertical liquid-cooled unit with a liquid replenishment device according to the present invention.

[0019] Figure 3 This is a left view of a vertical liquid cooler unit with a liquid replenishment device according to the present invention.

[0020] Figure 4 This is a front view of a vertical liquid-cooled unit with a liquid replenishment device according to this utility model, omitting the outer casing.

[0021] Figure 5 The image shown is a right view of a vertical liquid-cooled unit with a liquid replenishment device according to this utility model, omitting the outer casing.

[0022] Figure 6 for Figure 1 The diagram shows a 3D view of the infusion tank.

[0023] Figure 7 for Figure 6 A three-dimensional view of the fluid replenishment tank from another angle.

[0024] Figure 8 This is a schematic diagram of the piping connection of a vertical liquid cooler unit with a liquid replenishment device according to the present invention.

[0025] Figure 9 This is a front view of an immersion energy storage system according to the present invention.

[0026] The attached diagram lists the components represented by each number as follows: 1. Vertical liquid-cooled chiller unit with liquid replenishment device; 10. Unit housing; 11. Chamber; 12. Air inlet; 13. Air outlet; 14. Outer shell; 15. Mounting frame; 2. Energy storage cabinet; 20. Mounting bracket; 3. Delivery pipeline; 30. Fan unit; 40. Refrigeration unit; 41. Compressor; 42. Condenser; 43. Liquid storage tank; 44. Dryer filter; 45. Electronic expansion valve; 46. Heat exchanger; 47. Gas-liquid separator; 48. Refrigeration pipeline; 50. Cooling unit; 51. Circulating pump; 52. Cooling pipeline 521. Inlet pipe; 522. Outlet pipe; 523. Inlet port; 524. Outlet port; 525. Inlet section; 526. Connecting section; 53. Impurity filter; 60. Replenishment unit; 61. Replenishment tank; 611. Drain pipe; 6111. Drain port; 6112. Second switch valve; 62. Replenishment pipeline; 621. Replenishment pipe; 622. Return pipe; 623. First solenoid valve; 624. Second solenoid valve; 63. Filling pipe; 631. Filling interface; 632. First switch valve; 70. Solenoid control unit. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0028] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0030] Please see Figures 1-5 and Figure 8 A vertical liquid chiller unit with a liquid replenishment device includes a unit housing 10, a mounting bracket 20, a fan unit 30, a refrigeration unit 40, a cooling unit 50, a liquid replenishment unit 60, and an electrical control unit 70. This vertical liquid chiller unit with a liquid replenishment device is used for cooling equipment cabinets with high heat dissipation requirements, such as energy storage cabinets for energy storage systems, data cabinets for data centers, and server racks for high-performance computers.

[0031] The unit housing 10 has a cavity 11, and an air inlet 12 and an air outlet 13 are provided on the side wall of the unit housing 10. The unit housing 10 is composed of a fixing frame 15 and an outer shell 14, with the outer shell 14 surrounding the cavity 11. The air outlet 13 and the air inlet 12 can be respectively provided on either side wall of the unit housing 10, and the air outlet 13 and the air inlet 12 are not on the same side wall. In this embodiment, the air inlet 12 is provided on the front side wall of the unit housing 10, and the air outlet 13 is provided on the left side wall of the unit housing 10.

[0032] The fan unit 30 is vertically arranged in the cavity 11 and close to the air outlet 13.

[0033] The refrigeration unit 40 includes a heat exchanger 46, a compressor 41, and a condenser 42, which are vertically arranged in the cavity 11. The heat exchanger 46, condenser 42, and fan unit 30 are distributed sequentially in the left-right direction, with the condenser 42 close to the side of the fan unit 30 away from the air outlet 13. The compressor 41 is located at one end of the fan unit 30 in the front-back direction. The heat exchanger 46, compressor 41, and condenser 42 are connected by a refrigeration pipe 48. The refrigeration pipe 48 located between the condenser 42 and the heat exchanger 46 is equipped with an electronic expansion valve 45. In this embodiment, the heat exchanger 46 is installed on the inner wall of the outer casing 14. The heat exchanger 46 is a plate heat exchanger, and the refrigeration pipe 48 is made of copper.

[0034] The cooling unit 50 includes a cooling pipe 52, which has an inlet pipe 521 and an outlet pipe 522. The inlet pipe 521 and the outlet pipe 522 are respectively connected to the heat exchanger 46. A circulation pump 51 is installed on the inlet pipe 521, which is located inside the cavity 11 and below the heat exchanger 46. The inlet pipe 521 has an inlet port 523, and the outlet pipe 522 has an outlet port 524. The inlet port 523 and the outlet port 524 can be respectively connected to the aforementioned equipment cabinet. The equipment cabinet, the circulation pump 51, and the heat exchanger 46 form a cooling circulation loop to achieve cooling and heat dissipation of the equipment cabinet.

[0035] The mounting bracket 20 is connected to the unit housing 10. The mounting bracket 20 and the unit housing 10 are vertically distributed. In this embodiment, the mounting bracket 20 is located at the bottom of the unit housing 10.

[0036] The replenishment unit 60 is mounted on the mounting bracket 20 and includes a replenishment tank 61. The replenishment tank 61 is connected to the cooling pipe 52. In this embodiment, the volume of the replenishment tank 61 is 200L. The coolant in the cooling pipe 52 and the replenishment tank 61 is synthetic oil, which replaces the traditional ethylene glycol aqueous solution. Synthetic oil has good thermal conductivity and not only has the advantages of high insulation, which can prevent electrical short circuits in case of leakage, but also does not easily breed microorganisms and is easy to maintain.

[0037] The electronic control unit 70 is used to control the coordinated operation between the fan unit 30, the refrigeration unit 40, the cooling unit 50, and the liquid replenishment unit 60.

[0038] As described above, the vertical liquid-cooled unit with a liquid replenishment device provided by this utility model, through the vertical arrangement of the fan unit 30, heat exchanger 46, compressor 41, and condenser 42, and the circulation pump 51 located below the heat exchanger 46, can compactly utilize the vertical space within the cavity 11 to achieve a three-dimensional arrangement of each component, thereby reducing the horizontal area occupied by the vertical liquid-cooled unit with the liquid replenishment device and enabling flexible arrangement in scenarios with limited space. By vertically setting the liquid replenishment unit 60 on the unit housing 10 and connecting the liquid replenishment tank 61 to the cooling pipe 52, the liquid replenishment unit 60 and the liquid-cooled unit are integrated, realizing integrated temperature control and fire protection. This not only avoids reliance on external liquid replenishment equipment and effectively simplifies the structure of the liquid-cooled unit, but also reduces the difficulty and cost of installation and maintenance and the risk of leakage.

[0039] Furthermore, the replenishment unit 60 also includes a replenishment pipeline 62, which includes a replenishment pipe 621 and a return pipe 622. The replenishment pipe 621 connects the replenishment tank 61 to the inlet pipe 521, and the return pipe 622 connects the replenishment tank 61 to the outlet pipe 522, thereby connecting the replenishment tank 61 to the cooling circulation loop and allowing the coolant in the replenishment tank 61 to participate in the cooling circulation. In this embodiment, the replenishment pipe 621 and the return pipe 622 are made of stainless steel.

[0040] Please see Figure 6 and Figure 7 The replenishment pipe 621 and the return pipe 622 are respectively equipped with a first solenoid valve 623 and a second solenoid valve 624. The first solenoid valve 623 and the second solenoid valve 624 are electrically connected to the solenoid control unit 70. The first solenoid valve 623 is used to control the connection between the replenishment tank 61 and the inlet pipe 521, and the second solenoid valve 624 is used to control the connection between the replenishment tank 61 and the outlet pipe 522. The solenoid control unit 70 is used to control the opening and closing of the first solenoid valve 623 and the second solenoid valve 624.

[0041] More specifically, a level sensor is installed inside the coolant tank 61 to detect the coolant level inside the coolant tank 61.

[0042] When the temperature inside the equipment cabinet becomes too high and reaches the level requiring fire suppression, the electrical control unit 70 controls the first electrical control valve 623 to be open and the second electrical control valve 624 to be closed. This connects the replenishment tank 61 to the inlet pipe 521, but disconnects it from the outlet pipe 522. Then, under the action of the circulating pump 51, the coolant in the replenishment tank 61 flows into the inlet pipe 521 and participates in the cooling circulation before entering the equipment cabinet. When the coolant level inside the equipment cabinet reaches a preset height, the electrical control unit 70 controls the first electrical control valve 623 to be closed and the second electrical control valve 624 to be open, allowing some of the coolant in the cooling pipe 52 to flow into the replenishment tank 61. When the level sensor detects that the coolant level in the replenishment tank 61 has reached a preset height, the electrical control unit 70 controls the first electrical control valve 623 to be closed and the second electrical control valve 624 to be closed, thus completing the fire suppression measures.

[0043] Furthermore, the replenishment unit 60 also includes a replenishment pipe 63, one end of which is connected to the replenishment pipe 621, and the connection between the replenishment pipe 63 and the replenishment pipe 621 is located between the first solenoid valve 623 and the inlet pipe 521; regardless of whether the first solenoid valve 623 is in the open or closed state, the replenishment pipe 63 can always be connected to the inlet pipe 521.

[0044] More specifically, the other end of the filling pipe 63 is equipped with a filling port 631, and a first switching valve 632 is installed at the filling port 631. The first switching valve 632 is used to control the connection status between the filling pipe 621 and the outside. When the replenishment tank 61 needs to be replenished with coolant, the operator can open the first solenoid valve 623 through the electronic control unit 70, and then add coolant to the replenishment tank 61 through the filling port 631. Considering extreme situations, if the coolant in the replenishment tank 61 is insufficient for firefighting, the operator can temporarily connect the filling port 631 through the pipeline and introduce coolant into the inlet pipe 521 to meet the firefighting needs.

[0045] More specifically, the coolant tank 61 is equipped with a drain pipe 611 located at the bottom of the tank. The drain pipe 611 has a drain outlet 6111, and a second switching valve 6112 is installed at the drain outlet 6111. The second switching valve 6112 controls the connection between the coolant tank 61 and the outside environment. When the coolant in the tank 61 needs to be replaced, the operator can open the second switching valve 6112 to drain the coolant.

[0046] Please see Figure 4 , Figure 5 and Figure 8The inlet pipe 521 has an inlet section 525 and a connecting section 526. One end of the inlet section 525 is connected to the inlet end of the circulating pump 51, and the connecting section 526 connects the outlet end of the circulating pump 51 to the heat exchanger 46. The inlet section 525 is located at one end of the circulating pump 51 in the front-rear direction, and the connecting section 526 and the outlet pipe 522 are located above the circulating pump 51. More specifically, the other end of the inlet section 525 is provided with an inlet port 523. In this embodiment, the inlet section 525 is located at the front end of the circulating pump 51. Through the three-dimensional arrangement of the inlet pipe 521 and the outlet pipe 522 in the cavity 11, the vertical liquid cooling unit with the liquid replenishment device has a compact structure, making full use of the vertical space of the cavity 11 and reducing the horizontal area occupied.

[0047] More specifically, the cooling unit 50 also includes an impurity filter 53, which is located in the inlet section 525 of the inlet pipe 521 and is close to the inlet port 523. In summary, the impurity filter 53, the circulating pump 51, and the heat exchanger 46 are connected sequentially via the cooling pipe 52. The inlet port 523 and the outlet port 524 are respectively connected to the equipment cabinet, thus forming a cooling circulation loop. The principle is as follows: under the action of the circulating pump 51, the hotter coolant in the equipment cabinet enters the impurity filter 53, and then enters the heat exchanger 46 via the circulating pump 51. The hotter coolant exchanges heat with the low-temperature, low-pressure liquid refrigerant in the heat exchanger 46 and is then cooled. Simultaneously, the low-temperature, low-pressure liquid refrigerant transforms into a low-temperature, low-pressure gaseous refrigerant. The low-temperature coolant then re-enters the equipment cabinet to cool it, and this cycle continues continuously to achieve the cooling effect. Furthermore, when the temperature inside the equipment cabinet is too high and reaches the level requiring fire suppression, the electrical control unit 70 will control the replenishment unit 60 to participate in the above cooling cycle.

[0048] Please see Figure 4 , Figure 5 and Figure 8 The refrigeration unit 40 also includes a gas-liquid separator 47 and a liquid storage tank 43, which are vertically arranged in the cavity 11. The compressor 41, gas-liquid separator 47, and liquid storage tank 43 are distributed sequentially in the left-right direction. The gas-liquid separator 47 is fixed to the outer wall of the compressor 41, and the liquid storage tank 43 is fixed to the bottom wall of the cavity 11 and located between the gas-liquid separator 47 and the liquid inlet section 525 of the liquid inlet pipe 521. Through the vertical arrangement and horizontal arrangement of the compressor 41, gas-liquid separator 47, and liquid storage tank 43 in the cavity 11, the vertical liquid-cooled unit with liquid replenishment device has a compact structure, making full use of the vertical space of the cavity 11 and reducing the horizontal area occupied.

[0049] More specifically, the gas-liquid separator 47 is installed on the refrigeration pipeline 48 between the heat exchanger 46 and the compressor 41, and the liquid receiver 43 is installed on the refrigeration pipeline 48 between the condenser 42 and the electronic expansion valve 45. The refrigeration unit 40 also includes a dryer filter 44, which is installed on the refrigeration pipeline 48 between the liquid receiver 43 and the electronic expansion valve 45.

[0050] In summary, the compressor 41, condenser 42, liquid receiver 43, dryer filter 44, electronic expansion valve 45, heat exchanger 46, and gas-liquid separator 47 are connected by refrigeration pipes 48, thus forming a refrigeration cycle. The principle is as follows: the compressor 41 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant; the condenser 42 cools the high-temperature, high-pressure gaseous refrigerant into a low-temperature, high-pressure gaseous-liquid coexisting refrigerant; simultaneously, the fan unit 30 dissipates heat from the condenser 42; the low-temperature, high-pressure gaseous-liquid coexisting refrigerant enters the liquid receiver 43, where the liquid receiver 43 further cools the liquid refrigerant. The storage and drying filter 44 filters and dries the gaseous refrigerant to remove impurities. The electronic control unit 70 controls the opening and closing of the electronic expansion valve 45, which expands the gaseous refrigerant into a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant enters the heat exchanger 46 and absorbs heat from the coolant in the heat exchanger 46 before evaporating and transforming into a low-temperature, low-pressure gaseous refrigerant, while the coolant is cooled. The low-temperature, low-pressure gaseous refrigerant enters the gas-liquid separator 47 for gas-liquid separation to prevent liquid slugging. Finally, the low-temperature, low-pressure gaseous refrigerant re-enters the compressor 41, and this cycle continues to achieve the refrigeration effect.

[0051] Additionally, please see Figure 9 This utility model also provides an immersion energy storage system, including an energy storage cabinet 2, in which a battery pack immersed in coolant and a temperature sensor for monitoring the temperature inside the energy storage cabinet 2 are installed; it also includes the aforementioned vertical liquid cooling unit 1 with a liquid replenishment device, wherein the liquid inlet 523 and the liquid outlet 524 are respectively connected to the energy storage cabinet 2 through a delivery pipeline 3, and the temperature sensor is electrically connected to the electronic control unit 70.

[0052] As described above, the immersion energy storage system provided by this utility model achieves efficient cooling of the energy storage cabinet 2 through the coordinated heat exchange of the refrigeration cycle loop and the cooling cycle loop, thereby enhancing the thermal runaway response capability of the immersion energy storage system and its operational reliability and stability.

[0053] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A vertical liquid-cooled chiller unit with a liquid replenishment device, characterized in that, include: The unit housing (10) has a cavity (11); The refrigeration unit (40) includes a heat exchanger (46) disposed within the cavity (11). The cooling unit (50) includes a cooling pipe (52) connected to the heat exchanger (46); The liquid replenishment unit (60) includes a liquid replenishment tank (61) connected to the cooling pipe (52); An electronic control unit (70) is used to control the coordinated operation between the refrigeration unit (40), the cooling unit (50), and the liquid replenishment unit (60).

2. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 1, characterized in that, The cooling pipe (52) is provided with an inlet pipe (521) and an outlet pipe (522), and the inlet pipe (521) and the outlet pipe (522) are respectively connected to the heat exchanger (46).

3. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 2, characterized in that, The replenishment unit (60) further includes a replenishment pipeline (62), which includes a replenishment pipe (621) and a return pipe (622). The replenishment pipe (621) connects the replenishment tank (61) and the inlet pipe (521), and the return pipe (622) connects the replenishment tank (61) and the outlet pipe (522).

4. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 3, characterized in that, The replenishment pipe (621) and the return pipe (622) are respectively equipped with a first solenoid valve (623) and a second solenoid valve (624), and the first solenoid valve (623) and the second solenoid valve (624) are electrically connected to the solenoid control unit (70).

5. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 4, characterized in that, The replenishment unit (60) also includes a liquid filling pipe (63), one end of which is connected to the replenishment pipe (621), and the connection between the liquid filling pipe (63) and the replenishment pipe (621) is located between the first solenoid valve (623) and the inlet pipe (521).

6. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 5, characterized in that, The other end of the liquid filling tube (63) is provided with a liquid filling interface (631), and a first switching valve (632) is provided at the liquid filling interface (631).

7. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 1, characterized in that, A liquid level sensor is installed inside the replenishment tank (61) to detect the liquid level height of the coolant inside the replenishment tank (61).

8. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 1, characterized in that, The replenishment tank (61) is equipped with a drain pipe (611), and a second switch valve (6112) is installed on the drain pipe (611).

9. The vertical liquid-cooled unit with a liquid replenishment device as described in claim 1, characterized in that, It also includes a mounting bracket (20), which is connected to the unit housing (10). The mounting bracket (20) and the unit housing (10) are vertically distributed, and the replenishment tank is installed on the mounting bracket (20).

10. An immersion energy storage system, comprising an energy storage cabinet (2), wherein the energy storage cabinet (2) is provided with a battery pack immersed in a coolant and a temperature sensor for monitoring the temperature inside the energy storage cabinet (2), characterized in that, It also includes a vertical liquid cooling unit (1) with a liquid replenishment device as described in any one of claims 1-9, wherein the cooling pipeline (52) is connected to the energy storage cabinet (2) through the delivery pipeline (3), and the temperature sensor is electrically connected to the electronic control unit (70).

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