Submerged liquid cooling temperature-controlled energy storage system

Abstract

The utility model provides a kind of immersion liquid cooling temperature control energy storage system, including liquid cooling unit, energy storage cabinet and controller, controller is used to control the collaborative work between liquid cooling unit, energy storage cabinet;Liquid cooling unit includes refrigeration unit and cooling unit, refrigeration unit includes heat exchanger, cooling unit includes the cooling pipeline being linked with heat exchanger;Energy storage cabinet includes cabinet body and delivery pipeline, multiple battery compartments are separately arranged in cabinet body, battery pack immersed in coolant is arranged in battery compartment, electromagnetic proportional valve for controlling coolant flow is arranged in delivery pipeline, temperature sensor for detecting battery cell temperature is arranged in battery pack.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid cooling systems for energy storage cells, and in particular to an immersion liquid-cooled temperature-controlled energy storage system. Background Technology

[0002] Currently, with the rapid development of modern technology, the demand for energy is increasing, and the demand for energy storage systems is also increasing. Energy storage systems need to be controlled at a suitable temperature during operation, so heat dissipation is required for energy storage systems.

[0003] In existing technologies, energy storage systems generally dissipate heat through air cooling or liquid cooling. Traditional liquid-cooled energy storage systems are mainly cold plate type. Liquid-cooled energy storage systems utilize the high specific heat capacity of coolant and achieve heat exchange with coolant through the cooperation of fluorine system and water system. The cooled coolant is supplied to liquid cooling plate, and the liquid cooling plate then exchanges heat with the battery cell to achieve heat transfer and dissipation.

[0004] However, the heat exchange between the liquid cooling plate and the battery cell is an indirect heat exchange, which has a low heat transfer efficiency. Moreover, the piping inside the liquid cooling plate is relatively complex, so the temperature of the already cooled coolant rises rapidly during the process of entering the liquid cooling plate, which reduces the cooling effect and affects the safety and service life of the battery cell. Utility Model Content

[0005] The purpose of this invention is to provide an immersion liquid-cooled temperature-controlled energy storage system, which aims to solve or at least partially solve the shortcomings of the aforementioned background technology. It adopts an immersion liquid cooling method to directly exchange heat with the energy storage battery, which has high heat transfer efficiency and can reduce the probability of thermal runaway caused by local overheating due to poor temperature uniformity of the battery pack, thereby improving the safety of the battery pack and extending its service life. In addition, the liquid cooling unit of this immersion liquid-cooled temperature-controlled energy storage system adopts a vertical and compact layout structure, which reduces the occupied area and can be flexibly arranged in space-constrained scenarios.

[0006] This utility model provides an immersion liquid-cooled temperature-controlled energy storage system, including a liquid-cooled unit, an energy storage cabinet, and a controller. The controller is used to control the coordinated operation between the liquid-cooled unit and the energy storage cabinet. The liquid cooling unit includes a refrigeration unit and a cooling unit. The refrigeration unit includes a heat exchanger, and the cooling unit includes cooling pipes connected to the heat exchanger. The energy storage cabinet includes a cabinet body and a delivery pipeline. The cabinet body is divided into multiple battery compartments, and each battery compartment contains a battery pack immersed in coolant. The delivery pipeline is equipped with an electromagnetic proportional valve for controlling the flow rate of the coolant, and the battery pack is equipped with a temperature sensor for detecting the temperature of the battery cells.

[0007] Furthermore, the delivery pipeline also includes an infusion pipe, which is connected to multiple infusion branches. Each infusion branch has at least one infusion port that communicates with the battery compartment. The battery compartment is also provided with a drain port.

[0008] Furthermore, the infusion branch is located near the bottom wall of the battery compartment, and the drain outlet is located near the top wall of the battery compartment.

[0009] Furthermore, the infusion branch extends horizontally, and the plurality of infusion ports are evenly distributed at intervals along the horizontal direction.

[0010] Furthermore, the cross-sectional area of ​​the infusion port is smaller than the cross-sectional area of ​​the main body of the infusion branch.

[0011] Furthermore, the delivery pipeline also includes a drain pipe and a second outlet pipe, the second outlet pipe being connected to the delivery pipe, the drain pipe being connected to the second outlet pipe, and the drain pipe being connected to a plurality of the drain ports respectively.

[0012] Furthermore, the cabinet body has a drain chamber connected to the second liquid outlet pipe, and the drain chamber is connected to a plurality of the drain ports respectively.

[0013] Furthermore, the cooling pipeline includes a first liquid inlet pipe and a first liquid outlet pipe, the delivery pipeline includes a second liquid inlet pipe, the first liquid outlet pipe and the second liquid inlet pipe are connected through a first connecting pipe, and the first liquid inlet pipe and the second liquid outlet pipe are connected through a second connecting pipe.

[0014] Furthermore, the liquid cooling unit has a cavity, and the refrigeration unit also includes a gas-liquid separator and a liquid storage tank arranged vertically in the cavity. The compressor, the gas-liquid separator, and the liquid storage tank are distributed sequentially in the left-right direction. The gas-liquid separator is fixed to the outer wall of the compressor, and the liquid storage tank is fixed to the bottom wall of the cavity and located between the gas-liquid separator and the first liquid inlet pipe.

[0015] Furthermore, the cooling pipeline also includes a replenishment pipe connected to the first liquid inlet pipe, the replenishment pipe being provided with a replenishment interface and a replenishment valve being provided at the replenishment interface.

[0016] The immersion liquid-cooled temperature-controlled energy storage system provided by this utility model uses immersion liquid cooling to directly exchange heat with the energy storage battery, resulting in high heat transfer efficiency. Through the cooperation of a controller, temperature sensor, and electromagnetic proportional valve, the flow rate of coolant flowing through each battery compartment can be controlled in real time to regulate the temperature, thereby controlling the temperature of each battery pack within a preset range and achieving temperature uniformity of the energy storage cabinet. Therefore, this immersion liquid-cooled temperature-controlled energy storage system can reduce the probability of thermal runaway caused by local overheating due to poor temperature uniformity of the battery pack, thereby improving the safety of the battery pack and extending its service life. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a front view of an immersion liquid-cooled temperature-controlled energy storage system according to the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the energy storage cabinet in this embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the energy storage cabinet in another embodiment of the present invention.

[0021] Figure 4 for Figure 2 The diagram shows the infusion branch.

[0022] Figure 5 for Figure 1 The left view of the liquid cooling unit shown.

[0023] Figure 6 for Figure 1 The liquid cooling unit shown is a front view omitting the outer casing.

[0024] Figure 7 for Figure 1 The liquid cooling unit shown is a right view omitting the outer casing.

[0025] Figure 8 This is a schematic diagram of the piping connection of the liquid cooling unit in this utility model.

[0026] The attached diagram lists the components represented by each number as follows: 10. Liquid-cooled unit; 11. Unit housing; 111. Chamber; 112. Air inlet; 113. Air outlet; 114. Outer shell; 115. Mounting frame; 12. Fan; 13. Refrigeration unit; 131. Compressor; 132. Condenser; 133. Refrigeration piping; 134. Liquid receiver; 135. Dryer filter; 136. Electronic expansion valve; 137. Heat exchanger; 138. Gas-liquid separator; 14. Cooling unit; 141. Cooling piping; 142. First liquid inlet pipe; 1421. Liquid inlet section; 1422. Connecting section ; 143, First outlet pipe; 144, Circulation pump; 145, Replenishment pipe; 146, Replenishment interface; 1461, Replenishment valve; 147, Impurity filter; 148, Inlet; 149, Outlet; 20, Energy storage cabinet; 21, Cabinet body; 211, Battery compartment; 212, Battery pack; 213, Drain outlet; 214, Drain chamber; 22, Second inlet pipe; 23, Second outlet pipe; 24, Infusion pipe; 241, Infusion branch; 242, Infusion port; 30, Controller; 40, First connecting pipe; 50, Second connecting pipe. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further 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 its scope.

[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 Figure 1 , Figure 2 and Figures 5-8 An immersion liquid-cooled temperature-controlled energy storage system includes a liquid-cooled unit 10, an energy storage cabinet 20, and a controller 30. The controller 30 is used to control the coordinated operation between the liquid-cooled unit 10 and the energy storage cabinet 20.

[0031] The liquid-cooled unit 10 includes a unit housing 11, a fan 12, a refrigeration unit 13, and a cooling unit 14.

[0032] The unit housing 11 has a cavity 111, and an air inlet 112 and an air outlet 113 are provided on the side wall of the unit housing 11. The unit housing 11 is composed of an outer shell 114 and a fixing frame 115, with the outer shell 114 forming the cavity 111. The air outlet 113 and the air inlet 112 can be respectively provided on either side wall of the unit housing 11, and the air outlet 113 and the air inlet 112 are not on the same side wall. In this embodiment, the air inlet 112 is provided on the front side wall of the unit housing 11, and the air outlet 113 is provided on the left side wall of the unit housing 11.

[0033] The fan 12 is vertically arranged inside the cavity 111 and close to the air outlet 113.

[0034] The refrigeration unit 13 includes a heat exchanger 137, a compressor 131, and a condenser 132, which are vertically arranged within the cavity 111. The heat exchanger 137, condenser 132, and fan 12 are distributed sequentially in the left-right direction, with the condenser 132 located closer to the fan 12 and furthest from the air outlet 113. The compressor 131 is located at one end of the fan 12 in the front-back direction. The heat exchanger 137, compressor 131, and condenser 132 are connected by a refrigeration pipe 133. An electronic expansion valve 136 is provided in the refrigeration pipe 133 located between the condenser 132 and the heat exchanger 137. In this embodiment, the heat exchanger 137 is mounted on the inner wall of the outer casing 114 and is a plate heat exchanger.

[0035] The cooling unit 14 includes a cooling pipe 141, which includes a first liquid inlet pipe 142 and a first liquid outlet pipe 143. The first liquid inlet pipe 142 and the first liquid outlet pipe 143 are respectively connected to the heat exchanger 137. A circulation pump 144 is provided on the first liquid inlet pipe 142. The circulation pump 144 is located in the cavity 111 and below the heat exchanger 137.

[0036] The energy storage cabinet 20 includes a cabinet body 21 and a transmission pipeline.

[0037] The cabinet 21 is divided into multiple vertically arranged battery compartments 211, and each battery compartment 211 contains a battery pack 212 immersed in coolant. The coolant used in this invention is synthetic oil, which replaces the traditional ethylene glycol aqueous solution. Synthetic oil has good thermal conductivity, not only has the advantage 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.

[0038] The delivery pipeline includes a second inlet pipe 22, a second outlet pipe 23, and a delivery pipe 24. The first outlet pipe 143, the second inlet pipe 22, and the delivery pipe 24 are connected. The delivery pipe 24 is vertically arranged inside the cabinet 21. The delivery pipe 24 is connected to multiple delivery branches 241. Each delivery branch 241 is connected to each battery compartment 211. Multiple battery compartments 211, the second outlet pipe 23, and the first inlet pipe 142 are connected. A cooling circulation loop is formed between the circulation pump 144, the heat exchanger 137, and the battery compartments 211 to achieve cooling and heat dissipation of the energy storage cabinet 20.

[0039] Each infusion branch 241 is equipped with an electromagnetic proportional valve for controlling the coolant flow rate, and the battery pack 212 is equipped with a temperature sensor for detecting the battery cell temperature. The temperature sensor feeds data back to the controller 30, which controls the opening and closing degree of the electromagnetic proportional valve to adjust the flow rate of the coolant entering the infusion branch 241. Each infusion branch 241 is also equipped with a turbine flow meter for monitoring the coolant flow rate. The turbine flow meter has built-in communication capabilities and can feed flow data back to the controller 30.

[0040] When the coolant flow rate in each infusion branch 241 is the same, the temperature of the battery pack 212 in each battery compartment 211 is similar and relatively uniform, indicating that the temperature inside the energy storage cabinet 20 is normal and thermal runaway has not occurred. If the temperature of the battery pack 212 in each battery compartment 211 is uneven, it means that the coolant flow rate in each infusion branch 241 is different. Therefore, operators can also determine the coolant flow rate in each infusion branch 241 by monitoring the temperature of the battery pack 212 in each battery compartment 211. Then, the controller 30 can control the opening and closing of the electromagnetic proportional valve to adjust the flow rate of the coolant entering the infusion branch 241, thereby achieving uniform temperature in each battery compartment 211.

[0041] Since the multiple battery compartments 211 are arranged vertically, and each battery compartment 211 has a different height, the coolant needs to overcome different resistances when flowing through different delivery branches 241, resulting in different coolant flow rates in each delivery branch 241. In this case, the controller 30 can change the flow rate by controlling the opening and closing degree of the electromagnetic proportional valve in each delivery branch 241, thereby ensuring that the coolant flow rate through each delivery branch 241 is the same, thus maintaining a uniform temperature in each battery compartment 211. Furthermore, when the temperature sensor detects that the temperature of a certain battery pack 212 exceeds a preset temperature, the temperature sensor feeds the temperature data back to the controller 30. The controller 30 adjusts the opening and closing degree of the electromagnetic proportional valve corresponding to that battery pack 212 to increase the flow rate, thereby controlling the temperature of that battery pack 212 to be similar to the temperatures of other battery packs 212, achieving temperature uniformity in the energy storage cabinet 20.

[0042] As described above, the immersion liquid-cooled temperature-controlled energy storage system provided by this utility model directly exchanges heat with the energy storage battery using an immersion liquid-cooling method, resulting in high heat transfer efficiency. Through the cooperation of the controller 30, temperature sensor, and electromagnetic proportional valve, the flow rate of the coolant flowing through each battery compartment 211 can be controlled in real time to adjust the temperature, thereby controlling the temperature of each battery pack 212 within a preset range and achieving temperature uniformity of the energy storage cabinet 20. Therefore, this immersion liquid-cooled temperature-controlled energy storage system can reduce the probability of thermal runaway caused by local overheating due to poor temperature uniformity of the battery pack 212, thereby improving the safety of the battery pack 212 and extending its service life. By vertically arranging the fan 12, heat exchanger 137, compressor 131, and condenser 132, and placing the circulation pump 144 below the heat exchanger 137, the vertical space within the cavity 111 can be compactly utilized to achieve a three-dimensional arrangement of the components, thereby reducing the horizontal area occupied by the liquid cooling unit 10 and enabling flexible arrangement in scenarios with limited space.

[0043] Please see Figure 2 and Figure 4 The infusion branch 241 is located inside the battery compartment 211 and has at least one infusion port 242 connected to the battery compartment 211. The battery compartment 211 is provided with a drain port 213, which is located on the side wall of the battery compartment 211. Through the cooperation of the infusion port 242 and the drain port 213, the battery compartment 211 can be connected to the infusion pipe 24 and the second outlet pipe 23 respectively. The battery compartment 211 participates in the cooling cycle to realize heat exchange between the coolant and the battery pack 212.

[0044] Furthermore, the infusion branch 241 is close to the bottom wall of the battery compartment 211, and the drain port 213 is close to the top wall of the battery compartment 211. Through the arrangement of the infusion branch 241 and the drain port 213, the coolant can flow in from the lower part of the battery compartment 211 and flow out from the higher part of the battery compartment 211, so as to fully immerse the battery pack 212 with coolant and improve heat exchange efficiency.

[0045] Furthermore, the infusion branch 241 extends horizontally, and multiple infusion ports 242 are evenly distributed horizontally. This arrangement allows the coolant to flow evenly into the battery compartment 211, preventing uneven coolant temperature within the battery compartment 211 from affecting the heat dissipation of the battery pack 212. In this embodiment, the infusion branch 241 extends in the left-right direction.

[0046] Furthermore, the cross-sectional area of ​​the infusion port 242 is smaller than the cross-sectional area of ​​the main body of the infusion branch 241. This arrangement can avoid reducing the flow rate of the coolant at the infusion port 242 due to the presence of multiple infusion ports 242, thereby ensuring that the coolant can enter the battery compartment 211 at a faster flow rate, promoting uniform coolant temperature within the battery compartment 211, and helping to maintain the temperature uniformity of each battery compartment 211.

[0047] Please see Figure 2 and Figure 7 The first liquid inlet pipe 142 has a liquid inlet 148, and the first liquid outlet pipe 143 has a liquid outlet 149. The liquid outlet 149 of the first liquid outlet pipe 143 is connected to the second liquid inlet pipe 22 through the first connecting pipe 40. The liquid inlet 148 of the first liquid inlet pipe 142 is connected to the second liquid outlet pipe 23 through the second connecting pipe 50. The first liquid outlet pipe 143, the first connecting pipe 40, the second liquid inlet pipe 22, the liquid delivery pipe 24, the liquid delivery branch 241, the battery compartment 211, the second liquid outlet pipe 23, the second connecting pipe 50, and the first liquid inlet pipe 142 are connected in sequence to enable the battery compartment 211 to participate in the cooling cycle.

[0048] In this embodiment, the delivery pipeline also includes a drain pipe 25, which is connected to a plurality of drain ports 213 respectively. The drain pipe 25 is also connected to a second outlet pipe 23, so that the second outlet pipe 23 is connected to a plurality of battery compartments 211.

[0049] Please see Figure 3 In another embodiment, the cabinet 21 has a drain chamber 214 connected to the second drain pipe 23. The drain chamber 214 is connected to a plurality of drain ports 213, thereby enabling the second drain pipe 23 to be connected to a plurality of battery compartments 211.

[0050] Please see Figures 6-8 The refrigeration unit 13 also includes a gas-liquid separator 138 and a liquid storage tank 134, which are vertically arranged in the cavity 111. The compressor 131, the gas-liquid separator 138, and the liquid storage tank 134 are distributed sequentially in the left-right direction. The gas-liquid separator 138 is fixed to the outer wall of the compressor 131, and the liquid storage tank 134 is fixed to the bottom wall of the cavity 111 and located between the gas-liquid separator 138 and the first liquid inlet pipe 142. More specifically, the gas-liquid separator 138 is installed on the refrigeration pipeline 133 between the heat exchanger 137 and the compressor 131, and the liquid storage tank 134 is installed on the refrigeration pipeline 133 between the condenser 132 and the electronic expansion valve 136. The refrigeration unit 13 also includes a dryer filter 135, which is installed on the refrigeration pipeline 133 between the liquid storage tank 134 and the electronic expansion valve 136.

[0051] In summary, the compressor 131, condenser 132, liquid receiver 134, dryer filter 135, electronic expansion valve 136, heat exchanger 137, and gas-liquid separator 138 are connected by refrigeration pipes 133, thus forming a refrigeration cycle. The principle is as follows: the compressor 131 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant; the condenser 132 cools the high-temperature, high-pressure gaseous refrigerant into a low-temperature, high-pressure gaseous-liquid coexisting refrigerant; simultaneously, the fan 12 dissipates heat from the condenser 132; the low-temperature, high-pressure gaseous-liquid coexisting refrigerant enters the liquid receiver 134, and the liquid receiver 134 cools the liquid refrigerant. The gaseous refrigerant is stored in a dryer filter 135 to filter and dry impurities. The controller 30 controls the opening and closing of the electronic expansion valve 136, which expands the gaseous refrigerant into a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant enters the heat exchanger 137 and absorbs heat from the coolant in the heat exchanger 137 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 138 for gas-liquid separation to prevent liquid slugging. Finally, the low-temperature, low-pressure gaseous refrigerant re-enters the compressor 131, and this cycle continues to achieve the refrigeration effect.

[0052] Please see Figures 6-8 The first liquid inlet pipe 142 has an inlet section 1421 and a connecting section 1422. One end of the inlet section 1421 is connected to the inlet end of the circulating pump 144, and the connecting section 1422 connects the outlet end of the circulating pump 144 to the heat exchanger 137. The inlet section 1421 is located at one end of the circulating pump 144 in the front-rear direction, and the connecting section 1422 and the first outlet pipe 143 are respectively located above the circulating pump 144. More specifically, the other end of the inlet section 1421 is provided with an inlet port 148. In this embodiment, the inlet section 1421 is located at the front end of the circulating pump 144. Through the three-dimensional arrangement of the first inlet pipe 142 and the first outlet pipe 143 in the cavity 111, the liquid cooling unit 10 has a compact structure, making full use of the vertical space of the cavity 111 and reducing the horizontal area occupied.

[0053] The cooling unit 14 also includes an impurity filter 147, which is disposed on the liquid inlet section 1421 and is close to the liquid inlet 148. In summary, the impurity filter 147, the circulation pump 144, and the heat exchanger 137 are connected in sequence through the cooling pipe 141. The first liquid outlet pipe 143 is connected to the second liquid inlet pipe 22, and the first liquid inlet pipe 142 is connected to the second liquid outlet pipe 23. A cooling circulation loop is formed between the impurity filter 147, the circulation pump 144, the heat exchanger 137, and the battery compartment 211. The principle is as follows: under the action of the circulation pump 144, the hotter coolant in the battery compartment 211 flows into the impurity filter 147, and then enters the heat exchanger 137 through the circulation pump 144. The hotter coolant exchanges heat with the low-temperature, low-pressure liquid refrigerant in the heat exchanger 137 and is then cooled. At the same time, the low-temperature, low-pressure liquid refrigerant is transformed into a low-temperature, low-pressure gaseous refrigerant. The low-temperature coolant re-enters the battery compartment 211 and cools the battery pack 212. This cycle continues to achieve the cooling effect.

[0054] In addition, the cooling pipe 141 also includes a replenishment pipe 145 connected to the inlet section 1421 of the first inlet pipe 142. The replenishment pipe 145 is provided with a replenishment interface 146, and a replenishment valve 1461 is provided at the replenishment interface 146. The replenishment valve 1461 is used to control the connection status between the replenishment interface 146 and the outside. When the cooling circulation loop needs to be replenished with coolant, the operator adds the replenished coolant to the first inlet pipe 142 through the replenishment interface 146.

[0055] 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. An immersion liquid-cooled temperature-controlled energy storage system, comprising a liquid-cooled unit (10), an energy storage cabinet (20), and a controller (30), characterized in that, The controller (30) is used to control the coordinated operation between the liquid chiller (10) and the energy storage cabinet (20); The liquid cooling unit (10) includes a refrigeration unit (13) and a cooling unit (14). The refrigeration unit (13) includes a heat exchanger (137), and the cooling unit (14) includes a cooling pipe (141) connected to the heat exchanger (137). The energy storage cabinet (20) includes a cabinet body (21) and a delivery pipeline. The cabinet body (21) is divided into multiple battery compartments (211). Each battery compartment (211) contains a battery pack (212) immersed in coolant. The delivery pipeline contains an electromagnetic proportional valve for controlling the flow rate of coolant. The battery pack (212) contains a temperature sensor for detecting the temperature of the battery cells.

2. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 1, characterized in that, The delivery pipeline also includes an infusion pipe (24), which is connected to multiple infusion branches (241). Each infusion branch (241) has at least one infusion port (242) connected to the battery compartment (211). The battery compartment (211) is also provided with a drain port (213).

3. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 2, characterized in that, The infusion branch (241) is close to the bottom wall of the battery compartment (211), and the drain port (213) is close to the top wall of the battery compartment (211).

4. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 2, characterized in that, The infusion branch (241) extends horizontally, and the plurality of infusion ports (242) are evenly distributed at intervals along the horizontal direction.

5. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 2, characterized in that, The cross-sectional area of ​​the infusion port (242) is smaller than the cross-sectional area of ​​the main body of the infusion branch (241).

6. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 2, characterized in that, The delivery pipeline also includes a drain pipe (25) and a second outlet pipe (23), the second outlet pipe (23) is connected to the delivery pipe (24), the drain pipe (25) is connected to the second outlet pipe (23), and the drain pipe (25) is connected to a plurality of drain ports (213).

7. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 6, characterized in that, The cabinet (21) has a drain chamber (214) connected to the second liquid outlet pipe (23), and the drain chamber (214) is connected to a plurality of drain ports (213).

8. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 6, characterized in that, The cooling pipeline (141) includes a first liquid inlet pipe (142) and a first liquid outlet pipe (143). The delivery pipeline includes a second liquid inlet pipe (22). The first liquid outlet pipe (143) and the second liquid inlet pipe (22) are connected through a first connecting pipe (40). The first liquid inlet pipe (142) and the second liquid outlet pipe (23) are connected through a second connecting pipe (50).

9. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 8, characterized in that, The liquid cooling unit (10) has a cavity (111). The refrigeration unit (13) also includes a gas-liquid separator (138) and a liquid storage tank (134) arranged vertically in the cavity (111). The compressor (131), the gas-liquid separator (138), and the liquid storage tank (134) are arranged in sequence along the left and right directions. The gas-liquid separator (138) is fixed to the outer wall of the compressor (131). The liquid storage tank (134) is fixed to the bottom wall of the cavity (111) and located between the gas-liquid separator (138) and the first liquid inlet pipe (142).

10. The immersion liquid-cooled temperature-controlled energy storage system as described in claim 8, characterized in that, The cooling pipe (141) also includes a replenishment pipe (145) connected to the first liquid inlet pipe (142). The replenishment pipe (145) is provided with a replenishment interface (146), and a replenishment valve (1461) is provided at the replenishment interface (146).

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