Energy storage system of liquid-cooled container

Abstract

The invention relates to the technical field of new energy storage, and discloses a liquid-cooled container energy storage system which comprises a container, an energy storage unit and a cooling unit, the energy storage unit is located in the container, and the energy storage unit is used for storing a power supply; the cooling unit comprises a cooling pipe network and a refrigerating device, the cooling pipe network is laid on the energy storage unit, the two ends of the cooling pipe network are connected with the refrigerating device, the cooling pipe network is filled with cooling liquid in a flowing mode, and the cooling pipe network is used for cooling the energy storage unit. An anti-freezing unit is arranged at the end, close to the refrigerating device, of the cooling pipe network, the cooling pipe network penetrates through the anti-freezing unit, and the anti-freezing unit is used for heating the cooling pipe network. The cooling device has the beneficial effects of good cooling effect and high energy utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy storage technology, and in particular to a liquid-cooled container energy storage system. Background Art

[0002] With the transformation of the global energy structure and the vigorous development of renewable energy, the share of new energy technologies in the energy market has been increasing. However, the power supply process of electric energy in new energy is usually carried out simultaneously with power generation, resulting in a large difference between the supply of electric energy in the power grid and the actual power consumption. In response to this, energy storage technology has become a research hotspot, among which container energy storage systems have attracted widespread attention due to their high efficiency, safety and flexibility. However, during the use of container energy storage systems, a large amount of heat will be generated due to the operation of various devices in the energy storage system. If the heat dissipation effect of the energy storage system is not good, it is easy to affect the normal operation of various devices and even cause damage to the energy storage system. In response to this, energy storage box systems that use liquid cooling for cooling have appeared in the prior art.

[0003] For example, the patent document with the announcement number CN117936978A discloses a container-type liquid-cooled energy storage system using a chiller, including a container, wherein the inner cavity of the container is provided with a battery module, a water-cooling circulation device and a fire-fighting device, the water-cooling circulation device cools down the electronic devices and the battery module in the inner cavity of the container through a first heat exchanger and a second heat exchanger, and then the heat exchanged water is passed into the circulating water inlet pipe, and the spray water pump sprays the cooling water on the cooling coil, thereby cooling the high-temperature cooling water out of the heat exchange, and improving the heat exchange efficiency through the heat conduction plate, and the cooling water after the heat exchange is passed into the water-cooling circulation device through the circulating water outlet pipe, thereby improving the heat dissipation efficiency in the container, and the use of water cooling to dissipate heat reduces the heat dissipation noise, which is suitable for use in areas with high noise requirements, has higher heat exchange efficiency, can complete more precise adjustments, and has better energy-saving effects.

[0004] Although the above technical solution can perform liquid cooling and heat dissipation in the container through a water-cooling circulation device, in the process of cooling the container energy storage system through liquid cooling, the cooling water is easily affected by the external ambient temperature during the transportation of the cooling water in the circulating water inlet pipe and the circulating water outlet pipe. When the ambient temperature is low, the cooling water is easily frozen in the circulating water inlet pipe and the circulating water outlet pipe, causing the circulating water inlet pipe and the circulating water outlet pipe to be blocked, thereby affecting the normal operation of the water-cooling circulation device. Summary of the invention

[0005] The present invention is intended to provide a liquid-cooled container energy storage system to solve the technical problem in the prior art that cooling water freezes and blocks in a circulating water inlet pipe and a circulating water outlet pipe, thereby affecting the normal operation of a water-cooled circulating device.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a liquid-cooled container energy storage system, comprising a container, an energy storage unit and a cooling unit, wherein the energy storage unit is located in the container, and the energy storage unit is used to store electric energy; the cooling unit comprises a cooling pipe network and a refrigeration device, wherein the cooling pipe network is laid in the energy storage unit, and both ends of the cooling pipe network are connected to the refrigeration device, the cooling pipe network is filled with coolant, and the cooling pipe network is used to cool the energy storage unit, and an antifreeze unit is provided at one end of the cooling pipe network near the refrigeration device, the cooling pipe network is passed through the antifreeze unit, and the antifreeze unit is used to heat the cooling pipe network.

[0007] The principle and advantages of this solution are: during the energy storage process, the coolant is transported to the energy storage unit through the cooling pipe network, and the coolant absorbs the heat generated by the operation of each device in the energy storage unit to complete the cooling of the energy storage unit. After absorbing the heat, the coolant is transported back to the refrigeration device for cooling and then transported to the container for cooling again. When the coolant is output from the refrigeration device, the coolant is heated by the antifreeze unit to prevent the coolant from freezing in the pipeline.

[0008] In this solution, the energy storage unit is liquid-cooled by the cooling unit to ensure that the temperature of the energy storage unit can be maintained within an appropriate range. While ensuring the normal operation of the energy storage system, the coolant in the cooling network is heated by the antifreeze unit to prevent the low-temperature coolant in the cooling network from freezing due to the influence of the ambient temperature when the ambient temperature is too low, causing the pipeline to be blocked, affecting the normal flow of the coolant in the cooling unit, and causing the cooling unit to be unable to cool the energy storage unit normally.

[0009] Preferably, as an improvement, the energy storage unit includes a plurality of battery racks arranged in sequence, each battery rack is provided with a plurality of partitions spaced apart in the height direction, the partitions are used to place batteries; a cooling cavity is provided in the partition, and both ends of the cooling cavity are connected to the cooling pipe network. When cooling, the coolant is directly filled into the partition, so that the coolant can absorb heat through the surface of the partition, thereby increasing the coverage area of ​​the coolant during cooling and improving the cooling effect.

[0010] Preferably, as an improvement, the cooling pipe network includes a plurality of liquid inlet branches and a plurality of liquid return branches, one end of the liquid inlet branch is connected to the output port of the refrigeration device, the other end of the liquid inlet branch is connected to the cooling cavity, and the liquid inlet branch is used to transport the coolant to each partition; one end of the liquid return branch is connected to the cooling cavity, the other end of the liquid return branch is connected to the input port of the refrigeration device, and the liquid return branch is used to transport the coolant after absorbing heat in each partition to the refrigeration device. By arranging a plurality of liquid inlet branches and liquid return branches in the cooling pipe network, the coolant can flow in a directional manner in the cooling pipe network, avoiding the coolant after absorbing heat from flowing back in the cooling pipe network to affect the cooling effect. At the same time, the plurality of liquid inlet branches and liquid return branches transport the coolant of each battery rack respectively, so that the coolant in each battery rack can flow independently of each other, avoiding insufficient coolant supply to the battery rack located at the rear end of the cooling pipe network, and ensuring the cooling effect of each battery rack.

[0011] Preferably, as an improvement, a power generation device is provided at one end of the cooling network close to the refrigeration device, and the power generation device includes a cold end box and a hot end box, the cold end box is connected to one end of the liquid inlet branch close to the refrigeration device, and the hot end box is connected to one end of the liquid return branch close to the refrigeration device, and the power generation device is used to generate electricity through the temperature difference at both ends of the cooling network. The power generation is generated by the cooled coolant and the coolant after absorbing heat to charge the energy storage unit and as the power consumption during the operation of the cooling unit, thereby reducing the energy loss during the operation of the energy storage system and reducing the use cost of the energy storage system. In addition, the temperature difference power generation can fully utilize the energy during the operation of the energy storage system and reduce energy waste.

[0012] Preferably, as an improvement, the cold end box and the hot end box are stacked and distributed in the height direction; a plurality of cold end cavities arranged in sequence are provided in the cold end box, and a plurality of hot end cavities arranged in sequence are provided in the hot end box; the positions of the hot end cavity and the cold end cavity are distributed correspondingly to each other, and a temperature difference power generation sheet is provided between the hot end cavity and the cold end cavity. This allows the cooled coolant to be evenly distributed in each cold end cavity of the cold end box, and the coolant that has absorbed heat to be evenly distributed in each hot end cavity of the hot end box, thereby improving the utilization rate of the cooled coolant and the coolant that has absorbed heat by the power generation device.

[0013] Preferably, as an improvement, the liquid inlet branch pipe, the liquid return branch pipe and the battery rack are detachably connected, so that the cooling pipe network can be disassembled and assembled according to the specific conditions of the container energy storage system, ensuring the flexibility of the cooling unit and improving the adaptability of the cooling system to different container energy storage systems.

[0014] Preferably, as an improvement, the antifreeze unit includes a cylinder, the cylinder is sleeved on the pipe body of the cooling pipe network near the outlet of the refrigeration device, and a heating element is arranged in the cylinder. While heating the coolant to prevent the coolant from freezing, the antifreeze unit surrounds the pipe body, so that the antifreeze unit can also keep the coolant in the cooling pipe network warm, reduce the influence of the external environment temperature on the coolant in the cooling pipe network, and reduce the heating energy consumption of the antifreeze unit during antifreeze.

[0015] Preferably, as an improvement, the heating element is arranged around the circumference of the tube body, so that the antifreeze unit can evenly heat the tube body from the circumference, thereby improving the uniformity of heating the coolant in the tube body.

[0016] Preferably, as an improvement, it further includes a detection unit, which includes a first sensor, a second sensor and a third sensor, the first sensor is used to monitor the ambient temperature, the second sensor is used to monitor the temperature of the coolant in the cooling pipe network near one end of the refrigeration device output port, and the third sensor is used to monitor the temperature in the antifreeze unit cylinder.

[0017] Preferably, as an improvement, a control unit is further included, and the control unit is used to adjust the operation of the antifreeze unit according to the detection result of the detection unit. When the coolant is heated by the antifreeze unit, the temperature of the coolant, the ambient temperature and the temperature of the antifreeze unit are detected, and the heating temperature of the antifreeze unit is adjusted according to the actual situation to ensure that the coolant is not frozen and has a sufficient cooling temperature, so as to avoid the temperature of the coolant being too high after passing through the antifreeze unit, which affects the cooling effect of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the liquid-cooled container energy storage system in an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the battery rack structure in an embodiment of the present invention.

[0020] Figure 3 Schematic diagram of the cooling unit structure in an embodiment of the present invention.

[0021] Figure 4 It is an exploded view of the structure of the power generation device in an embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the antifreeze unit in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The figure marks in the drawings of the specification include: container 1, energy storage unit 2, battery rack 201, partition 202, cooling unit 3, refrigeration device 301, liquid outlet pipe 302, liquid return pipe 303, power generation device 4, cold end box 401, hot end box 402, hot end cavity 403, temperature difference power generation sheet 404, antifreeze unit 5, cylinder 501, heating element 502.

[0025] As attached Figure 1 As shown, a liquid-cooled container energy storage system includes a container 1, an energy storage unit 2 and a cooling unit 3. The energy storage unit 2 is located in the container 1, the energy storage unit 2 is used to store energy, and the cooling unit 3 is used to dissipate heat and cool the energy storage unit 2.

[0026] The energy storage unit 2 includes a battery rack 201, wherein the battery rack 201 includes a plurality of battery racks 201, and the plurality of battery racks 201 are evenly distributed in the container 1. Figure 2 As shown, a plurality of partitions 202 are provided on the battery rack 201, and the plurality of partitions 202 are spaced apart in sequence along the height direction on the battery rack 201, and a battery is provided on each partition 202, and the battery is used to store electrical energy, wherein the connection structure between the batteries on the battery rack 201 and the charging and discharging process of the battery are prior arts and will not be described in detail here.

[0027] The cooling unit 3 includes a cooling pipe network and a refrigeration device 301. The cooling pipe network is filled with coolant. The cooling pipe network is laid on the battery rack 201. The cooling pipe network is used to cool the batteries placed on the battery rack 201. Specifically, a cooling cavity is opened in each partition 202, and a liquid inlet and a liquid outlet are opened on both sides of the partition 202. The liquid inlet and the liquid outlet are both through the side wall of the partition 202. The liquid inlet and the liquid outlet are both connected to the cooling pipe network. The liquid inlet is used to transport the coolant in the cooling pipe network to the cooling cavity in the partition 202. The cooling cavity is used to cool the battery by the coolant. The liquid outlet is used to transport the coolant in the cooling cavity to the cooling pipe network. The partition 202 is made of a heat-conducting material. Preferably, in this embodiment, the partition 202 is made of an aluminum nitride plate. In other embodiments, other heat-conducting materials can also be selected. When cooling, the coolant is directly filled into the partition 202, so that the coolant can absorb heat through the surface of the partition 202, increase the coverage area of ​​the coolant during cooling, and improve the cooling effect. And avoid embedding the coolant delivery pipeline into the partition 202 so that the coolant needs to pass through the pipe wall and the partition 202 to absorb heat again, resulting in a decrease in the thermal conductivity of the coolant when cooling the heat absorption, resulting in a decrease in the amount of heat absorbed by the coolant, affecting the cooling effect of the energy storage system.

[0028] As attached Figure 3As shown, the output port of the refrigeration device 301 is connected to the input port of the cooling network through the liquid outlet pipe 302, and the input port of the refrigeration device 301 is connected to the output port of the cooling network through the liquid return pipe 303. The refrigeration device 301 is used to cool the coolant in the cooling network, wherein the specific structure of the refrigeration device 301 is the prior art and will not be described here. In the cooling process, the coolant can be cooled and cooled under the action of the refrigeration device 301, and then the energy storage unit 2 is repeatedly cooled and cooled, so that the coolant can be reused in the cooling unit 3.

[0029] The end of the liquid outlet pipe 302 and the liquid return pipe 303 away from the refrigeration device 301 is connected to a power generation device 4, wherein the power generation device 4 includes a cold end box 401 and a hot end box 402. Figure 4 As shown, the cold end box 401 and the hot end box 402 are stacked and distributed in the height direction. A plurality of cold end cavities arranged in sequence are provided in the cold end box 401, and a plurality of input ports and a plurality of output ports are provided at both ends of the cold end box 401. The input port of the cold end box 401 and the output port of the cold end box 401 are both connected to the cold end cavity. Specifically, one cold end cavity corresponds to one input port of the cold end box 401 and a plurality of output ports of the cold end box 401. The input port of the cold end box 401 is connected to the liquid outlet pipe 302, and the liquid outlet pipe 302 is used to transport the cooling liquid cooled by the refrigeration device 301 into the cold end cavity.

[0030] A plurality of hot end chambers 403 arranged in sequence are provided in the hot end box 402, and a plurality of input ports and a plurality of output ports are provided at both ends of the hot end box 402, and the input port of the hot end box 402 and the output port of the hot end box 402 are both connected with the hot end chamber 403, and specifically one hot end chamber 403 corresponds to one hot end box 402 input port and a plurality of hot end box 402 output ports, and the hot end box 402 input port is connected with a liquid return branch pipe, and the liquid return branch pipe is used to transport the coolant in the hot end chamber 403 to the refrigeration device 301. The cooled coolant can be evenly distributed in each cold end chamber of the cold end box 401, and the coolant after absorbing heat can be evenly distributed in each hot end chamber 403 in the hot end box 402, thereby improving the utilization rate of the cooled coolant and the coolant after absorbing heat by the power generation device 4.

[0031] The positions of the hot end cavity 403 and the cold end cavity are distributed correspondingly to each other, wherein a thermoelectric power generation sheet 404 is fixedly installed between the hot end cavity 403 and the cold end cavity by bolts, wherein the cold end of the thermoelectric power generation sheet 404 extends into the cold end cavity, and the hot end of the thermoelectric power generation sheet 404 extends into the hot end cavity 403, and the thermoelectric power generation sheet 404 is used to generate electricity through the temperature difference between the coolant in the hot end cavity 403 and the coolant in the cold end cavity, wherein the specific structure and power generation process of the thermoelectric power generation sheet 404 are prior art and will not be described in detail here. By generating electricity through the cooled coolant and the coolant after absorbing heat to charge the energy storage unit 2 and as the power consumption during the operation of the cooling unit 3, the energy loss during the operation of the energy storage system is reduced, and the use cost of the energy storage system is reduced. In addition, through thermoelectric power generation, the energy during the operation of the energy storage system can be fully utilized to reduce energy waste.

[0032] The cooling pipe network includes a plurality of liquid inlet branches and a plurality of liquid return branches, which are sequentially laid on each battery rack 201, and the liquid inlet branches, the liquid return branches and the battery rack 201 are detachably connected by buckles or bolts. One end of the liquid inlet branch is connected to the output port of the cold end box 401, and the other end of the liquid inlet branch is connected to the liquid inlet of the partition 202. The liquid inlet branch is used to transport the coolant in the cold end box 401 to each partition 202; one end of the liquid return branch is connected to the liquid outlet of the partition 202, and the other end of the liquid return branch is connected to the input port of the hot end cavity 403. The liquid return branch is used to transport the coolant after absorbing heat in each partition 202 to the hot end box 402. By setting a plurality of liquid inlet branches and liquid return branches in the cooling pipe network, the coolant can flow in a directional manner in the cooling pipe network, and the coolant after absorbing heat is prevented from flowing back in the cooling pipe network to affect the cooling effect. At the same time, the plurality of liquid inlet branches and liquid return branches respectively transport the coolant of each battery rack 201, so that the coolant in each battery rack 201 can flow independently of each other, and the battery rack 201 located at the rear end of the cooling pipe network is prevented from being insufficiently supplied with coolant, and the cooling effect of each battery rack 201 is ensured. In addition, the liquid inlet branch and the liquid return branch are detachably connected to the battery rack 201, so that the cooling pipe network can be disassembled and assembled according to the specific situation of the container 1 energy storage system, so as to ensure the flexibility of the cooling unit 3 and improve the adaptability of the cooling system to different container 1 energy storage systems.

[0033] Also includes an antifreeze unit 5, as shown in the attached Figure 5As shown, the antifreeze unit 5 includes a cylinder 501, which has a hollow structure. The liquid outlet pipe 302 is penetrated in the cylinder 501, and a heating element 502 is provided on the inner wall of the cylinder 501. The heating element 502 is arranged around the circumference of the liquid outlet pipe 302. The heating element 502 is used to heat the coolant in the liquid outlet pipe 302, wherein the heating element 502 can be a heating device such as a heating wire or a heating plate. Preferably, in the present embodiment, the antifreeze unit 5 uses a heating wire to heat the coolant in the liquid outlet pipe 302.

[0034] It also includes a detection unit and a control unit, wherein the detection unit includes a first sensor, a second sensor and a third sensor, wherein the first sensor, the second sensor and the third sensor are all temperature sensors, the first sensor is used to monitor the ambient temperature, the second sensor is used to monitor the temperature of the coolant in the liquid outlet pipe 302, and the third sensor is used to monitor the temperature in the cylinder 501 of the antifreeze unit 5. Preferably, in this embodiment, the first sensor and the third sensor are selected from the temperature sensor model E52-P10GRY, and the second sensor is selected from the temperature sensor model E52-P10GPY.

[0035] The control unit is electrically connected to the monitoring unit and the antifreeze unit 5. The control unit is used to adjust the operation of the antifreeze unit 5 according to the detection result of the detection unit. Specifically, when the first sensor of the detection unit detects that the ambient temperature is lower than the preset value, and the second sensor detects that the temperature of the coolant in the liquid outlet pipe 302 is lower than the preset value, the control unit controls the antifreeze unit 5 to heat the coolant in the liquid outlet pipe 302, wherein the preset value of the ambient temperature and the preset value of the coolant temperature can be the condensation temperature of the coolant. The control unit is also used to monitor the temperature in the antifreeze unit 5 through the third sensor. When the temperature in the barrel 501 of the antifreeze unit 5 is greater than the preset value, the control unit adjusts the heating temperature of the heating element 502 in the antifreeze unit 5, wherein the preset value of the temperature of the barrel 501 of the antifreeze unit 5 can be the temperature value of the coolant in the cooling unit 3. When the coolant is heated by the antifreeze unit 5, the coolant temperature, the ambient temperature and the temperature of the antifreeze unit 5 are detected, and the heating temperature of the antifreeze unit 5 is adjusted according to actual conditions to ensure that the coolant is not frozen and has a sufficient cooling temperature, thereby avoiding the coolant having an excessively high temperature after passing through the antifreeze unit 5, which affects the cooling effect of the coolant.

[0036] The specific implementation process is as follows:

[0037] During the energy storage process of the energy storage system, the coolant is transported to the cooling cavity in each partition 202 on the battery rack 201 through the cooling pipe network. The coolant absorbs the heat of the battery on the partition 202 in the cooling cavity to complete the cooling of the battery. The coolant after absorbing the heat is transported back to the refrigeration device 301 for cooling and then transported to the container 1 for cooling again. When the coolant is output from the refrigeration device 301, the coolant is heated by the antifreeze unit 5 according to the temperature monitoring of the detection unit to prevent the coolant from freezing in the pipeline.

[0038] Compared with the prior art, in this solution, the energy storage unit 2 is liquid-cooled by the cooling unit 3 to ensure that the temperature of the energy storage unit 2 can be maintained within an appropriate range. While ensuring the normal operation of the energy storage system, the liquid outlet pipe 302 is heated by the temperature detection result of the detection unit to avoid freezing of the low-temperature coolant in the liquid outlet pipe 302 due to the influence of the ambient temperature when the ambient temperature is too low, causing the pipeline to be blocked, affecting the normal flow of the coolant in the cooling unit 3, and causing the cooling unit 3 to be unable to cool the energy storage unit 2 normally.

[0039] The above are only embodiments of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A liquid-cooled container energy storage system, characterized in that: It includes a container, an energy storage unit and a cooling unit. The energy storage unit is located in the container and is used to store power. The cooling unit includes a cooling pipe network and a refrigeration device. The cooling pipe network is laid in the energy storage unit. Both ends of the cooling pipe network are connected to the refrigeration device. The cooling pipe network is filled with coolant and is used to cool the energy storage unit. An antifreeze unit is provided at one end of the cooling pipe network close to the refrigeration device. The cooling pipe network is passed through the antifreeze unit and the antifreeze unit is used to heat the cooling pipe network.

2. A liquid-cooled container energy storage system according to claim 1, characterized in that: The energy storage unit includes a plurality of battery racks arranged in sequence, each battery rack is provided with a plurality of partitions spaced apart in the height direction, the partitions are used to place batteries; a cooling cavity is opened in the partition, and both ends of the cooling cavity are connected to the cooling pipe network.

3. A liquid-cooled container energy storage system according to claim 2, characterized in that: The cooling pipe network includes multiple liquid inlet branches and multiple liquid return branches, one end of the liquid inlet branch is connected to the output port of the refrigeration device, and the other end of the liquid inlet branch is connected to the cooling cavity, and the liquid inlet branch is used to transport the cooling liquid to each partition; one end of the liquid return branch is connected to the cooling cavity, and the other end of the liquid return branch is connected to the input port of the refrigeration device, and the liquid return branch is used to transport the cooling liquid after absorbing heat in each partition to the refrigeration device.

4. A liquid-cooled container energy storage system according to claim 3, characterized in that: A power generation device is provided at one end of the cooling pipe network close to the refrigeration device, and the power generation device includes a cold end box and a hot end box. The cold end box is connected to one end of the liquid inlet branch pipe close to the refrigeration device, and the hot end box is connected to one end of the liquid return branch pipe close to the refrigeration device. The power generation device is used to generate electricity through the temperature difference at both ends of the cooling pipe network.

5. A liquid-cooled container energy storage system according to claim 4, characterized in that: The cold end box and the hot end box are stacked in the height direction; a plurality of cold end cavities arranged in sequence are opened in the cold end box, and a plurality of hot end cavities arranged in sequence are opened in the hot end box; the positions of the hot end cavities and the cold end cavities are distributed correspondingly to each other, and a temperature difference power generation sheet is provided between the hot end cavity and the cold end cavity.

6. A liquid-cooled container energy storage system according to claim 3, characterized in that: The liquid inlet branch pipe, the liquid return branch pipe and the battery rack are detachably connected.

7. A liquid-cooled container energy storage system according to claim 1, characterized in that: The antifreeze unit comprises a cylinder, which is sleeved on a pipe body of the cooling pipe network at one end close to the output port of the refrigeration device, and a heating element is arranged in the cylinder.

8. A liquid-cooled container energy storage system according to claim 7, characterized in that: The heating element is arranged around the circumference of the tube body.

9. A liquid-cooled container energy storage system according to any one of claims 1 to 8, characterized in that: It also includes a detection unit, which includes a first sensor, a second sensor and a third sensor. The first sensor is used to monitor the ambient temperature, the second sensor is used to monitor the temperature of the coolant in the cooling pipe network near the output port of the refrigeration device, and the third sensor is used to monitor the temperature in the antifreeze unit cylinder.

10. A liquid-cooled container energy storage system according to claim 9, characterized in that: It also includes a control unit, which is used to adjust the operation of the antifreeze unit according to the detection result of the detection unit.

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