Energy storage system PACK refrigerant leakage detection system and energy storage cabinet

Abstract

The invention belongs to the technical field of energy storage equipment, and particularly relates to an energy storage system PACK refrigerant leakage detection system which comprises a server applied to a direct cooling type energy storage cabinet and further comprises a static detection assembly and a dynamic detection assembly. Before the direct cooling unit is started, the static detection assembly detects the static pressure in the circulating pipeline, and the server judges whether the circulating pipeline leaks or not according to the static pressure; when the direct cooling unit operates, the dynamic detection assembly detects the concentration of a refrigerant in the battery compartment, and the server judges whether the circulating pipeline leaks or not according to the concentration of the refrigerant; according to the direct cooling unit, refrigerant leakage can be found in time before operation, potential safety hazards caused by continuous operation of the direct cooling unit under the condition that leakage points exist in a circulating pipeline are avoided, refrigerant leakage can also be found in time in the operation process, maintenance personnel can know the condition and conduct maintenance in time, and the energy storage cabinet can rapidly recover normal operation; the invention further particularly relates to an energy storage cabinet adopting the system for detecting the refrigerant leakage of the energy storage system PACK.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage equipment, and in particular to a detection system for refrigerant leakage of an energy storage system PACK and an energy storage cabinet. Background Art

[0002] If the battery pack in the energy storage cabinet works under overheating conditions, it will have an adverse effect on the battery performance and life. Therefore, a refrigeration system is needed to dissipate heat. Traditional refrigeration systems generally use liquid cooling units, using ethylene glycol aqueous solution as the coolant to dissipate heat from the battery cells. When the liquid cooling unit is refrigerating, the compressor cools the refrigerant, and the refrigerant exchanges heat with the coolant through the heat exchanger. The coolant is then circulated through the battery pack through a water pump to exchange heat with the battery cells.

[0003] There are the following problems with heat dissipation using liquid cooling units: heat exchangers and water pumps increase equipment costs and require additional space in the energy storage cabinet; the refrigerant exchanges heat with the refrigerant liquid through the heat exchanger, resulting in temperature loss, which generally makes the heat exchange efficiency between 75% and 85%, reducing the overall energy efficiency of the system; in order to solve the above problems, existing direct-cooling energy storage cabinets use direct cooling units for refrigeration. After the compressor cools the refrigerant, the refrigerant flows directly to the cold plate at the bottom of the battery pack through a circulation pipe, eliminating the need for a heat exchanger and a water pump.

[0004] In a direct-cooling energy storage cabinet, the refrigerant has a long path in the circulation pipe and the pressure in the circulation pipe is relatively high. During long-term use, there may be a problem of refrigerant leakage. Common refrigerant leakage detection is generally carried out through manual regular maintenance. Manual maintenance cannot detect refrigerant leakage in time. The energy storage cabinet may have been running for a long time with a leak, posing a greater safety hazard. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a refrigerant leakage detection system for an energy storage system PACK that can detect refrigerant leakage in a timely manner.

[0006] The technical solution adopted by the present invention is as follows: A detection system for refrigerant leakage of an energy storage system PACK, comprising a server, characterized in that it is applied to a direct-cooling energy storage cabinet, and further comprises a static detection component and a dynamic detection component; Before the direct cooling unit is started, the static detection component detects the static pressure in the circulation pipeline, and the server determines whether the circulation pipeline is leaking according to the static pressure; When the direct cooling unit is running, the dynamic detection component detects the refrigerant concentration in the battery compartment, and the server determines whether the circulation pipeline is leaking according to the refrigerant concentration.

[0007] Working principle: Before the direct cooling unit is started, the static detection component can determine whether the circulation pipeline is leaking. Before the direct cooling unit is operated, maintenance personnel can know the situation and carry out timely maintenance. When the direct cooling unit is running, the internal pressure of the circulation pipeline is relatively large, and leakage may occur during operation. Therefore, when a leakage occurs, the refrigerant will spread in the space inside the battery compartment, which is conducive to the dynamic detection component to detect the concentration in the battery compartment, and refrigerant leakage can be discovered in time during operation.

[0008] Compared with the prior art, the present invention has the following beneficial effects: Through the cooperation of static detection components and dynamic detection components, refrigerant leakage can be discovered in time before operation, avoiding the direct cooling unit from continuing to operate when there is a leak in the circulation pipeline, which may cause safety hazards. Refrigerant leakage can also be discovered in time during operation, and the liquid energy unit can be stopped in time to prevent further leakage of refrigerant. When the server determines that a leak has occurred, maintenance personnel can be aware of the situation and repair it in time, so that the energy storage cabinet can quickly resume normal operation.

[0009] As a preferred embodiment of the present invention, the circulation pipeline adopts a segmented pipeline, each segment of the pipeline is detachably connected to the adjacent pipeline, and each segment of the pipeline is provided with a detection probe point; The static detection component includes a pressure gauge, which detects the pressure in the circulation pipeline; the dynamic detection component includes a refrigerant detector, and a single refrigerant detector is connected to a plurality of electrochemical sensors, each of which corresponds to a detection probe point and is located outside each section of the pipeline; The server stores the pipeline identification of each section of the pipeline and the detection identification of each electrochemical sensor. Each pipeline representation and the detection identification are stored in association. The server determines the corresponding pipeline where leakage occurs according to the detection value of each electrochemical sensor.

[0010] Working principle: When the direct cooling unit is running, the refrigerant is in a two-phase state (liquid and gas), and during the circulation process, due to the influence of external temperature, the proportion of its own gas and liquid changes at any time, so that the pressure in the pipeline changes at any time during the flow of the refrigerant. Therefore, it is necessary to perform static detection when the valve is closed to detect the static pressure changes inside the pipeline over a period of time to determine whether there is a leak. By setting up a refrigerant detector and multiple electrochemical sensors, when a single-section pipeline leaks, the electrochemical sensor closest to the leak will react with the leaked refrigerant most quickly to generate a measurable current or voltage signal. The size of the signal is linearly related to the concentration of the target gas. The gas concentration can be inferred by measuring the change in the signal. Therefore, the location of the leaking pipeline and the size of the leak can be determined when the pressure in the pipeline changes at any time.

[0011] Beneficial effects: 1. Multiple electrochemical sensors are used to form multiple probes to detect the refrigerant concentration near multiple pipes. The detected values ​​are processed by the refrigerant detector and transmitted to the server. The specific leaking pipes can be identified for reference by maintenance personnel.

[0012] 2. Due to the segmented pipeline, the specific leaking pipeline can be found by detecting the probe points, and the maintenance personnel can directly replace the new pipeline. In the existing leak repair scheme, the refrigerant pipeline is generally made of copper pipes, which can be sealed with glue or repair welding. However, the pressure in the refrigerant pipeline is relatively high, and the use of sealants is prone to leakage again, which is only suitable for temporary leak repair. Repair welding requires maintenance personnel to carry professional repair welding equipment and disassemble the pipeline for repair welding. In this scheme, a single section of the pipeline can be directly replaced, which has high maintenance efficiency and allows the energy storage cabinet to quickly resume normal operation.

[0013] As a preferred embodiment of the present invention, a two-way horn quick connector is provided between two adjacent pipes.

[0014] Beneficial effect: By setting up a two-way horn quick connector, after the compressor recovers the refrigerant into the direct cooling unit, the corresponding pipeline can be quickly disassembled and assembled, with high maintenance efficiency, so that the energy storage cabinet can quickly resume normal operation.

[0015] As a preferred embodiment of the present invention, a display screen is included. When a leak occurs, the server transmits the judgment result, the concentration of the leaked refrigerant, and the location of the leaked pipeline to the display screen for display.

[0016] Beneficial effect: By setting up a display screen, it is convenient for maintenance personnel to view and refer to it during maintenance.

[0017] As a preferred embodiment of the present invention, an alarm is also included. When a leak occurs in the pipeline, the server transmits a signal to the controller, and the controller controls the alarm to issue a remote alarm.

[0018] Beneficial effect: The alarm promptly notifies maintenance personnel to conduct maintenance, allowing the energy storage cabinet to quickly resume normal operation.

[0019] As a preferred embodiment of the present invention, there are multiple pressure gauges, which are distributed on corresponding pipelines, and each pressure gauge corresponds to a detection probe point. Before the direct cooling unit is operated, multiple pressure gauges detect the static pressure. When the static pressure value changes, the leaking pipeline is judged according to the amplitude of the change.

[0020] Working principle: When a pipeline leaks, the closer the pressure is to the leak, the greater the pressure change amplitude is, and the greater the change amplitude of the detection value of the detection probe is, which means that the leak is closer to the detection probe. Therefore, by comparing the positions of multiple detection probes, the pipeline corresponding to the leak can be determined.

[0021] Beneficial effect: During static detection, the leaking pipeline can be identified. When a leak occurs, there is no need to perform dynamic detection to determine the leak location, thus avoiding refrigerant leakage caused by dynamic detection when a leak has already occurred.

[0022] As a preferred embodiment of the present invention, the detection probe point is located in the middle of the corresponding pipeline, and a leak occurs in the pipeline corresponding to the detection probe point with the largest pressure change amplitude.

[0023] Beneficial effect: When the detection probe point is not in the middle of the pipeline, but close to the next pipeline, when a leak occurs near the detection probe point, although the approximate location of the leak can be determined through detection, it is not easy to determine whether the pipeline where the leak is located is the pipeline where the detection probe point is located, or in the next pipeline; by setting the detection probe point in the middle, the pipeline corresponding to the detection probe point with the largest pressure value change is the pipeline where the leak occurs, and the positioning is more accurate.

[0024] As a preferred embodiment of the present invention, the circulation pipeline includes a liquid inlet pipeline connected to the direct cooling unit, and also includes a liquid separation component and a plurality of liquid inlet branches. The liquid separation component diverts the refrigerant in the liquid inlet pipeline to the plurality of liquid inlet branches through a plurality of diversion ports. The plurality of liquid inlet branches correspond one-to-one to the plurality of battery packs, and the flow resistance in each liquid inlet branch is the same; the length and diameter of each of the liquid inlet branches are equal, and each of the liquid inlet branches includes a vertical portion and a transverse portion. The vertical portion of each of the liquid inlet branches is bent downward 180° according to the corresponding battery pack height, and then bent 90° to form a transverse portion, and the length of each of the transverse portions is the same.

[0025] Beneficial effects: 1. After the refrigerant passes through the liquid inlet hole, it will flow to the surrounding liquid separation holes in a scattered manner. The liquid separation holes are arranged in a ring around the liquid inlet hole, so that the flow entering each liquid inlet branch pipe is more uniform.

[0026] 2. Due to the nature of the refrigerant itself, the refrigerant is in a two-phase state (gas and liquid exist at the same time) when it flows out of the direct cooling unit. In the same section of space in the pipe body, the gaseous refrigerant will be mostly distributed above the space under the influence of gravity. For the horizontally arranged liquid distributor, the gaseous refrigerant will be retained in the upper diversion hole as much as possible. The liquid inlet of the liquid distributor faces downward and the liquid outlet faces upward. The whole is in a vertical state. The direction of the diversion is set around the vertical center line, so that the gaseous refrigerant is more evenly distributed in the space.

[0027] 3. By folding 180°, the height of each vertical part can be effectively reduced. The bending of the pipe will cause resistance locally, but when the direct cooling unit is in operation, the pressure in the entire circulation pipeline is relatively high, and the flow resistance caused by the bending can be ignored; and by setting parallel vertical and horizontal parts, the overall appearance is more beautiful.

[0028] As a preferred embodiment of the present invention, multiple pressure gauges are distributed in the liquid inlet pipeline and each liquid inlet branch. The pressure value variation range of the liquid inlet pipeline is judged by the direct cooling temperature of the compressor, and the pressure value variation range of each liquid inlet branch is judged by the temperature in the battery cabinet. When the server determines whether the actual pressure detected by the pressure gauge exceeds the corresponding pressure value variation range, it determines whether the corresponding pipeline is leaking.

[0029] Beneficial effect: After multiple pressure gauges have been used for static detection, although dynamic detection is not required to confirm the leak location, dynamic detection is still required when a leak occurs during the operation of the direct cooling unit. When the direct cooling unit is in operation, the refrigerant will change its state according to its own temperature change. The higher the temperature, the higher the proportion of the gaseous part and the greater the pressure. During the transmission process, the refrigerant is affected by the temperature of the corresponding area, and the pressure change range in the corresponding pipeline can be determined, thereby realizing dynamic detection of refrigerant leaks. When a leak occurs at a leak point, it diffuses in the air and takes a certain amount of time to rise to a certain concentration before it can react with the electrochemical sensor. Monitoring only by concentration has low sensitivity. By combining monitoring with a pressure gauge, the sensitivity of the detection system can be improved.

[0030] A second object of the present invention is to provide an energy storage cabinet, which adopts the direct cooling energy storage cabinet cooling system according to the above claim, can timely detect leakage and quickly detect the pipeline with the leak, so as to facilitate rapid maintenance by maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a principle block diagram of Embodiment 1 of the detection system for refrigerant leakage of the energy storage system PACK of the present invention; Figure 2 It is a schematic diagram of the installation of the circulation pipeline of the second embodiment of the detection system for refrigerant leakage of the energy storage system PACK of the present invention; Figure 3 It is a structural schematic diagram of the circulation pipeline of the second embodiment of the detection system for refrigerant leakage of the energy storage system PACK of the present invention.

[0032] The reference numerals include: liquid inlet pipeline 1, liquid inlet branch pipe 2, vertical portion 21, transverse portion 22, liquid distributor 3, liquid return pipeline 4, liquid return branch pipe 5, battery pack direct cooling unit 6, battery pack 7. DETAILED DESCRIPTION

[0033] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0034] In the description of the present application, the terms "first", "second", etc. are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] Embodiment 1: See also Figure 1 As shown, the energy storage system PACK refrigerant leakage detection system disclosed in this embodiment includes a circulation pipeline, a server, a controller, an alarm, a display screen, a static detection component and a dynamic detection component; valves are provided at both ends of the circulation pipeline, and a segmented pipeline is adopted, a two-way horn quick connector is provided between two adjacent pipelines, and a detection probe point is provided on each section of the pipeline.

[0036] Among them, the static detection component includes a pressure gauge, which detects the pressure in the circulation pipeline; the dynamic detection component includes a refrigerant detector, a single refrigerant detector is connected to multiple electrochemical sensors, each electrochemical sensor corresponds to a detection probe point, and is located on the outside of each section of the pipeline; the server stores the pipeline identification of each section of the pipeline and the detection identification of each electrochemical sensor, each pipeline representation and detection identification are stored in association, and the server determines the corresponding pipeline where a leak occurs based on the detection value of each electrochemical sensor.

[0037] When a leak occurs, the server transmits the judgment result, the concentration of the leaked refrigerant, and the location of the leaked pipeline to the display screen for display. The server transmits a signal to the controller, and the controller controls the liquid cooling unit to stop starting and controls the alarm to issue a remote alarm.

[0038] The operating principle and method of this embodiment are as follows: When the battery cell reaches the preset temperature, the direct cooling unit is ready to start, the valves at both ends of the circulation pipeline are closed, and after waiting for a preset time, the pressure gauge transmits the detected pressure value to the server. The server determines whether the pressure value exceeds the variation range (to avoid temperature influence), thereby determining whether a leak occurs. The server sends a signal so that the controller controls the alarm to send out a remote alarm to notify maintenance personnel, and the server sends a signal so that the controller controls the direct cooling unit to start and run for a specified time. In the case of refrigerant circulation, the refrigerant diffuses through the leak point, contacts and reacts with the electrochemical sensor. The closer the electrochemical sensor is to the leak point, the higher the concentration detected and the faster the value increases. The server obtains the pipeline identifier based on the detection identifier of the electrochemical sensor, and transmits the corresponding pipeline position and concentration data to the display screen for display.

[0039] The energy storage cabinet of this embodiment adopts the direct-cooling energy storage cabinet cooling system according to the above-mentioned claim, which can timely discover leakage and quickly detect the pipeline with the leak, so as to facilitate rapid inspection and repair by maintenance personnel.

[0040] Embodiment 2: On the basis of the first embodiment, the energy storage system PACK refrigerant leakage detection system of this embodiment has a plurality of pressure gauges, which are distributed on corresponding pipelines, and each pressure gauge corresponds to a detection probe point. Before the direct cooling unit is operated, the plurality of pressure gauges detect the static pressure. When the static pressure value changes, the pipeline where the leak occurs is determined according to the amplitude of the change. When a pipeline leaks, the closer the pressure change amplitude is to the leak point, the greater the pressure change amplitude is, and the greater the change amplitude of the detection value of the detection probe point is, indicating that the leak point is closer to the detection probe point. Therefore, by comparing the positions of the plurality of detection probe points, the pipeline corresponding to the leak point can be determined.

[0041] Among them, the detection probe point is located in the middle of the corresponding pipeline, and the pipeline corresponding to the detection probe point with the largest pressure change amplitude has a leak; when the detection probe point is not in the middle of the pipeline, but close to the next pipeline, when a leak occurs near the detection probe point, although the approximate position of the leak can be determined by detection, it is not easy to determine whether the pipeline where the leak is located is the pipeline where the detection probe point is located, or in the next pipeline; by setting the detection probe point in the middle, the pipeline corresponding to the detection probe point with the largest pressure value change is the pipeline where the leak occurs, and the positioning is more accurate.

[0042] Embodiment three: See 2 and Figure 3 On the basis of the second embodiment, the energy storage system PACK refrigerant leakage detection system of this embodiment, the circulation pipeline includes a liquid inlet pipeline 1 connected to the direct cooling unit, and also includes a liquid separation component and a plurality of liquid inlet branches 2. The liquid separation component divides the refrigerant in the liquid inlet pipeline 1 into the plurality of liquid inlet branches 2 through a plurality of diversion ports. The plurality of liquid inlet branches 2 correspond to the plurality of battery packs 7 one by one, and the flow resistance in each liquid inlet branch 2 is the same; the length and diameter of each of the liquid inlet branches 2 are equal, and each of the liquid inlet branches 2 includes a vertical portion 21 and a horizontal portion 2 2. The vertical portion 21 of each of the liquid inlet branch pipes 2 is bent downward 180° according to the height of the corresponding battery pack 7, and then bent 90° to form a transverse portion 22, and the length of each of the transverse portions 22 is the same; after the refrigerant passes through the liquid inlet hole, the refrigerant will flow to the surrounding liquid separation holes in a scattered manner, and the liquid separation holes are arranged in a ring around the liquid inlet hole, so that the flow entering each liquid inlet branch pipe 2 is more uniform; by folding 180°, the height of each vertical portion 21 can be effectively reduced, and by arranging the vertical portion 21 and the transverse portion 22 in parallel, the overall appearance is more beautiful.

[0043] The liquid separation component adopts a liquid separator 3, and the flow separation holes of the liquid separator 3 are arranged in a ring shape, so that the refrigerant after the flow separation is more uniform.

[0044] The circulation pipeline further includes a liquid return pipeline 4 and a plurality of liquid return branches 5. The refrigerant passing through the battery pack 7 is transmitted through the liquid return branch 5, and the refrigerant is collected to the liquid return pipeline 4 through the liquid distributor 3 and transmitted to the direct cooling unit.

[0045] Among them, multiple pressure gauges are distributed in the liquid inlet pipeline 1 and each liquid inlet branch pipe 2. The pressure value variation range of the liquid inlet pipeline 1 is determined by the direct cooling temperature of the compressor, and the pressure value variation range of each liquid inlet branch pipe 2 is determined by the temperature in the battery cabinet. When the server determines whether the actual pressure detected by the pressure gauge exceeds the corresponding pressure value variation range, it determines whether the corresponding pipeline is leaking. When the direct cooling unit is running, the refrigerant will change its state according to its own temperature change. The higher the temperature, the higher the proportion of the gaseous part and the greater the pressure. During the transmission process, the refrigerant is affected by the temperature of the corresponding area, and the pressure variation range in the corresponding pipeline can be determined, thereby realizing dynamic detection of refrigerant leakage. When a leak occurs at a leak point, it diffuses in the air and takes a certain amount of time to rise to a certain concentration before it can react with the electrochemical sensor. Monitoring only by concentration has low sensitivity. By combining monitoring with a pressure gauge, the sensitivity of the detection system can be improved.

[0046] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A detection system for refrigerant leakage of an energy storage system PACK, comprising a server, characterized in that: Applied to direct-cooling energy storage cabinets, it also includes static detection components and dynamic detection components; Before the direct cooling unit is started, the static detection component detects the static pressure in the circulation pipeline, and the server determines whether the circulation pipeline is leaking according to the static pressure; When the direct cooling unit is running, the dynamic detection component detects the refrigerant concentration in the battery compartment, and the server determines whether the circulation pipeline is leaking according to the refrigerant concentration.

2. The detection system for refrigerant leakage of the energy storage system PACK according to claim 1, characterized in that: The circulation pipeline adopts a segmented pipeline, each segment of the pipeline is detachably connected to the adjacent pipeline, and each segment of the pipeline is provided with a detection probe point; The static detection component includes a pressure gauge, which detects the pressure in the circulation pipeline; the dynamic detection component includes a refrigerant detector, and a single refrigerant detector is connected to a plurality of electrochemical sensors, each of which corresponds to a detection probe point and is located outside each section of the pipeline; The server stores the pipeline identification of each section of the pipeline and the detection identification of each electrochemical sensor. Each pipeline representation and the detection identification are stored in association. The server determines the corresponding pipeline where leakage occurs according to the detection value of each electrochemical sensor.

3. The detection system for refrigerant leakage of the energy storage system PACK according to claim 2, characterized in that: A two-way horn quick connector is arranged between two adjacent pipes.

4. The detection system for refrigerant leakage of the energy storage system PACK according to claim 2, characterized in that: It also includes a display screen and a controller. When a leak occurs, the server transmits the judgment result, the concentration of the leaked refrigerant, and the location of the leaked pipeline to the display screen for display. The server transmits a signal to the controller, and the controller controls the liquid cooling unit to stop starting.

5. The detection system for refrigerant leakage of the energy storage system PACK according to claim 4, characterized in that: It also includes an alarm. When a leak occurs in the pipeline, the server transmits a signal to the controller, and the controller controls the alarm to send out a remote alarm.

6. The detection system for refrigerant leakage of the energy storage system PACK according to claim 2, characterized in that: There are multiple pressure gauges, which are distributed on corresponding pipelines. Each pressure gauge corresponds to a detection probe point. Before the direct cooling unit is operated, multiple pressure gauges detect static pressure. When the static pressure value changes, the leaking pipeline is judged according to the amplitude of the change.

7. The detection system for refrigerant leakage of the energy storage system PACK according to claim 6, characterized in that: The detection probe point is located in the middle of the corresponding pipeline, and a leak occurs in the pipeline corresponding to the detection probe point with the largest pressure change amplitude.

8. The detection system for refrigerant leakage of the energy storage system PACK according to claim 6, characterized in that: The circulation pipeline includes a liquid inlet pipeline connected to the direct cooling unit, and also includes a liquid separation component and multiple liquid inlet branches. The liquid separation component diverts the refrigerant in the liquid inlet pipeline to multiple liquid inlet branches through multiple diversion ports. The multiple liquid inlet branches correspond to multiple battery packs one by one, and the flow resistance in each liquid inlet branch is the same; the length and diameter of each of the liquid inlet branches are equal, and each of the liquid inlet branches includes a vertical portion and a transverse portion. The vertical portion of each of the liquid inlet branches is bent downward 180° according to the corresponding battery pack height, and then bent 90° to form a transverse portion, and the length of each of the transverse portions is the same.

9. The detection system for refrigerant leakage of the energy storage system PACK according to claim 8, characterized in that: Multiple pressure gauges are distributed in the liquid inlet pipeline and each liquid inlet branch. The pressure value variation range of the liquid inlet pipeline is determined by the direct cooling temperature of the compressor, and the pressure value variation range of each liquid inlet branch is determined by the temperature inside the battery cabinet. When the server determines whether the actual pressure detected by the pressure gauge exceeds the corresponding pressure value variation range, it determines whether the corresponding pipeline is leaking.

10. An energy storage cabinet, characterized in that: A detection system for refrigerant leakage of an energy storage system PACK as described in any one of claims 1 to 9.

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