A detection system for refrigerant leakage of a power storage system PACK and a power storage cabinet

Abstract

The patent application belongs to the technical field of energy storage equipment, and particularly relates to a detection system for refrigerant leakage of an energy storage system PACK, which comprises a server, is applied to a direct-cooling energy storage cabinet, and further comprises a static detection component and a dynamic detection component; before starting of the direct-cooling unit, the static detection component detects static pressure in a circulating pipeline, and the server judges whether the circulating pipeline leaks according to the static pressure; when the direct-cooling unit is running, the dynamic detection component detects refrigerant concentration in a battery cabin, and the server judges whether the circulating pipeline leaks according to the refrigerant concentration; refrigerant leakage can be found in time before running, so that the direct-cooling unit can be prevented from continuously running in the case that the circulating pipeline has a leakage point, and a safety hazard is caused; refrigerant leakage can also be found in time during running, so that maintenance personnel can know the condition and timely maintenance, and the energy storage cabinet can quickly recover normal running; the patent further particularly relates to an energy storage cabinet adopting the detection system for refrigerant leakage of the energy storage system PACK.

Description

TECHNICAL FIELD

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

[0002] The battery pack in the energy storage cabinet works under overheating conditions, which has an adverse effect on the performance and service life of the battery, therefore, a refrigeration system is needed for heat dissipation, and the traditional refrigeration system generally uses a liquid cooling unit to dissipate heat, using ethylene glycol water solution as the cooling liquid for the battery cell, when the liquid cooling unit is refrigerating, the refrigerant is refrigerated by the compressor, and then the refrigerant exchanges heat with the cooling liquid through the heat exchanger, and the cooling liquid is circulated by the water pump to exchange heat with the battery cell.

[0003] The liquid cooling unit has the following problems in heat dissipation: the heat exchanger and the water pump increase the cost of the equipment, and additional space is needed in the energy storage cabinet; the refrigerant exchanges heat with the refrigerant through the heat exchanger, which causes temperature loss, so that the heat exchange efficiency is generally 75%-85%, reducing the overall energy efficiency ratio of the system; in order to solve the above problems, the existing direct cooling type energy storage cabinet uses a direct cooling unit for refrigeration, the refrigerant is directly flowed into the cold plate at the bottom of the battery pack through the circulating pipeline after being refrigerated by the compressor, and the heat exchanger and the water pump are omitted.

[0004] In the direct cooling type energy storage cabinet, the path of the refrigerant in the circulating pipeline is long, and the pressure in the circulating pipeline is high, so there may be refrigerant leakage during long-term use; common refrigerant leakage detection is generally carried out by periodic manual maintenance, which cannot timely detect refrigerant leakage, and the energy storage cabinet may have been running for a long time with leakage, which has great safety hazards. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, one of the purposes of the present application is to provide a detection system for refrigerant leakage of an energy storage system PACK, which can timely detect refrigerant leakage.

[0006] The technical scheme adopted by the present application is as follows:

[0007] A detection system for refrigerant leakage of an energy storage system PACK, comprising a server, characterized by being applied to a direct cooling type energy storage cabinet, further comprising a static detection component and a dynamic detection component;

[0008] Before the direct cooling unit is started, the static detection component detects the static pressure in the circulating pipeline, and the server judges whether the circulating pipeline is leaking according to the static pressure;

[0009] When the direct cooling unit is running, the dynamic detection component detects the refrigerant concentration in the battery cabin, and the server judges whether the circulating pipeline is leaking according to the refrigerant concentration.

[0010] Working principle: Before the start of the direct cooling unit, the static detection assembly can determine whether the circulating pipeline leaks, and before the operation of the direct cooling unit, the maintenance personnel can know the condition and timely repair; when the direct cooling unit is running, the internal pressure of the circulating pipeline is relatively large, and leakage points may occur during operation, therefore, when leakage occurs, the refrigerant will spread in the space in the battery cabin, and the dynamic detection assembly can detect the concentration in the battery cabin, so that the refrigerant leakage can be found in time during operation.

[0011] Compared with the prior art, the beneficial effects of the present application are that:

[0012] Through the cooperation of the static detection assembly and the dynamic detection assembly, refrigerant leakage can be found in time before operation, and the direct cooling unit can be prevented from continuously running in the case of leakage in the circulating pipeline, thereby avoiding safety hazards, and refrigerant leakage can also be found in time during operation, so that the liquid energy unit can be stopped in time to prevent continuous refrigerant leakage, and when the server judges that leakage occurs, the maintenance personnel can know the condition and timely repair, so that the energy storage cabinet can quickly recover normal operation.

[0013] As a preferred embodiment of the present application, the circulating pipeline adopts a segmented pipeline, each pipeline is detachably connected with an adjacent pipeline, and each pipeline is provided with a detection probe point;

[0014] The static detection assembly comprises a pressure gauge, and the pressure gauge detects the pressure in the circulating pipeline; the dynamic detection assembly comprises a refrigerant detector, and each refrigerant detector is connected with a plurality of electrochemical sensors, each electrochemical sensor corresponds to a detection probe point and is located on the outer side of each pipeline;

[0015] The server stores the pipeline identification of each pipeline and the detection identification of each electrochemical sensor, each pipeline identification and detection identification is stored in association, and the server judges the corresponding pipeline that leaks according to the detection value of each electrochemical sensor.

[0016] Working principle: Since the refrigerant is in a two-phase state (liquid and gas) when the direct cooling unit is running, and the proportion of gas and liquid changes at any time due to the influence of the external temperature during circulation, the pressure in the pipeline changes at any time during the flow of the refrigerant, therefore, static detection is needed when the valve is closed to detect the static pressure change in the pipeline within a period of time, so as to determine whether there is leakage, and by arranging the refrigerant detector and the plurality of electrochemical sensors, when a single pipeline leaks, the electrochemical sensor closest to the leakage point will first have an oxidation-reduction reaction with the leaked refrigerant, and a measurable current or voltage signal is generated, the size of the signal is linearly related to the concentration of the target gas, and the gas concentration can be calculated by measuring the change of the signal, therefore, the position of the leaking pipeline and the size of the leakage point can be determined under the condition that the pressure in the pipeline changes at any time.

[0017] Beneficial effects:

[0018] 1、By multiple electrochemical sensors form multiple probes, detect the refrigerant concentration near multiple pipelines, and transmit the detection values to the server after processing by the refrigerant detector, so that the specific leaking pipeline can be identified for reference by maintenance personnel.

[0019] 2、Since the segmented pipeline is provided, the specific leaking pipeline can be known through the detection probe, and the maintenance personnel can directly replace the new pipeline. The existing leak repair scheme generally uses copper pipes for refrigerant pipelines, and sealing glue or repair welding can be used. However, the pressure in the refrigerant pipeline is relatively large, and the use of sealing glue is prone to re-leakage, 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 the present scheme, the single-segment pipeline can be directly replaced, the maintenance efficiency is high, and the energy storage cabinet can quickly recover normal operation.

[0020] As a preferred embodiment of the present application, a bidirectional horn quick connector is arranged between the two adjacent pipelines.

[0021] Beneficial effects: By arranging the bidirectional horn quick connector, the corresponding pipeline can be quickly disassembled after the compressor recovers the refrigerant into the direct cooling unit, the maintenance efficiency is high, and the energy storage cabinet can quickly recover normal operation.

[0022] As a preferred embodiment of the present application, a display screen is included, and when leakage occurs, the server transmits the judgment result, the leaked refrigerant concentration, and the leaked pipeline position to the display screen for display.

[0023] Beneficial effects: By arranging the display screen, maintenance personnel can easily check and refer during maintenance.

[0024] As a preferred embodiment of the present application, an alarm is further included, and when the pipeline leaks, the server transmits a signal to the controller, and the controller controls the alarm to issue a remote alarm.

[0025] Beneficial effects: The alarm timely informs the maintenance personnel to repair, so that the energy storage cabinet can quickly recover normal operation.

[0026] As a preferred embodiment of the present application, the number of pressure gauges is multiple, multiple pressure gauges are distributed on the corresponding pipelines, each pressure gauge corresponds to a detection probe, and multiple pressure gauges detect static pressure before the operation of the direct cooling unit. When the static pressure value changes, the pipeline with leakage can be determined according to the change amplitude.

[0027] Working principle: when the pipeline leaks, the closer to the leak point, the greater the pressure change, the greater the detection value change of the detection probe, the closer to the detection probe, and therefore, by comparing the positions of multiple detection probes, the corresponding pipeline of the leak point can be determined.

[0028] Beneficial effect: when static detection is performed, the pipeline with a leak can be determined, and when a leak occurs, dynamic detection is not required to determine the leak position, thereby avoiding the leakage of refrigerant caused by dynamic detection in the case of leakage.

[0029] As a preferred embodiment of the present application, the detection probe is located in the middle of the corresponding pipeline, and the pipeline corresponding to the detection probe with the greatest pressure change is the pipeline with a leak.

[0030] Beneficial effect: when the detection probe is not located in the middle of the pipeline but close to the next pipeline, when a leak occurs near the detection probe, although the approximate position of the leak can be determined by detection, it is not easy to determine whether the pipeline with the leak is the pipeline where the detection probe is located or the next pipeline; by setting the detection probe in the middle, the pipeline corresponding to the detection probe with the greatest pressure change is the pipeline with a leak, and the positioning is more accurate.

[0031] As a preferred embodiment of the present application, the circulating pipeline comprises a liquid inlet pipeline in communication with the direct cooling unit, a liquid distribution assembly, and a plurality of liquid inlet branch pipes, the liquid distribution assembly divides the refrigerant in the liquid inlet pipeline into the plurality of liquid inlet branch pipes through a plurality of distribution ports, the plurality of liquid inlet branch pipes correspond to the plurality of battery packs one by one, and the flow resistance in each liquid inlet branch pipe is the same; the length and the diameter of each liquid inlet branch pipe are equal, each liquid inlet branch pipe comprises a vertical portion and a horizontal portion, the vertical portion of each liquid inlet branch pipe is bent downward by 180° and then bent by 90° to form the horizontal portion according to the height of the corresponding battery pack, and the lengths of the horizontal portions are the same.

[0032] Beneficial effect:

[0033] 1. After the refrigerant passes through the liquid inlet hole, the refrigerant will flow to the surrounding distribution holes in a scattered manner, the distribution holes are arranged annularly around the liquid inlet hole, so that the flow into each liquid inlet branch pipe is more uniform.

[0034] 2. Due to the nature of the refrigerant, when the refrigerant flows out of the direct cooling unit, it is in a two-phase state (both gaseous and liquid states) in the same space in the pipe body, under the influence of gravity, the gaseous refrigerant will be mostly distributed above the space, for the horizontally arranged liquid distributor, the gaseous refrigerant will try to stay in the upper distribution hole, the liquid inlet hole of the liquid distributor faces downward, the liquid outlet hole faces upward, and the whole is in a vertical state, the distribution direction is arranged around the vertical center line, so that the gaseous refrigerant is more evenly distributed in the space.

[0035] 3. By folding 180°, the height of each vertical part can be effectively reduced, and the bending of the pipeline will generate resistance in the local part, but the pressure in the entire circulating pipeline is large when the direct cooling unit is running, and the flow resistance generated by the bending can be ignored; and by arranging the vertical parts and the horizontal parts in parallel, the whole is more beautiful.

[0036] As a preferred embodiment of the application, a plurality of said pressure gauges are distributed in the liquid inlet pipeline, each liquid inlet branch pipe, the pressure value change range of the liquid inlet pipeline is judged by the direct cooling temperature of the compressor, and the pressure value change range of each liquid inlet branch pipe is judged by the temperature in the battery cabinet, and the server judges whether the actual pressure detected by the pressure gauge exceeds the corresponding pressure value change range, thereby judging whether the corresponding pipeline leaks.

[0037] Beneficial effect: After static detection by multiple pressure gauges, dynamic detection is still required when leakage occurs during the running of the direct cooling unit, because the refrigerant will change state according to its own temperature change when the direct cooling unit is running, the higher the temperature, the higher the proportion of gaseous part, and the greater the pressure, and the refrigerant is affected by the temperature of the corresponding area during transmission, so that the pressure change range in the corresponding pipeline can be judged, thereby realizing dynamic detection of refrigerant leakage, and because the leakage point diffuses in the air when leakage occurs, it needs a certain time to rise to a certain concentration before reacting with the electrochemical sensor, only by monitoring the concentration, the sensitivity is low, and by combining with the pressure gauge for monitoring, the sensitivity of the detection system can be improved.

[0038] The second purpose of the application is to provide a storage cabinet, which adopts the direct cooling type storage cabinet cooling system according to the above-mentioned claim, so that the leakage can be found in time, and the pipeline with the leakage point can be quickly detected for the maintenance personnel to quickly repair. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is the principle diagram of the first embodiment of the refrigerant leakage detection system of the energy storage system PACK of the application;

[0040] Figure 2 is the installation schematic diagram of the circulating pipeline of the second embodiment of the refrigerant leakage detection system of the energy storage system PACK of the application;

[0041] Figure 3 is the structure schematic diagram of the circulating pipeline of the second embodiment of the refrigerant leakage detection system of the energy storage system PACK of the application.

[0042] The reference signs include: liquid inlet pipeline 1, liquid inlet branch pipe 2, vertical part 21, horizontal part 22, liquid distributor 3, liquid return pipeline 4, liquid return branch pipe 5, battery pack direct cooling unit 6, and battery pack 7. DETAILED DESCRIPTION

[0043] The exemplary embodiments embodying the features and advantages of the present application will be described in detail hereinafter. It should be understood that the present application can be varied in a wide range of embodiments, none of which depart from the scope of the present application, and the description and drawings are to be considered in an illustrative sense only and not to limit the application.

[0044] In the description of the present application, the terms "first", "second", etc. are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structures referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0045] Embodiment one:

[0046] Referring to Figure 1 As shown in the drawings, the energy storage system PACK refrigerant leakage detection system disclosed in the embodiment comprises a circulating pipeline, a server, a controller, an alarm, a display screen, a static detection assembly and a dynamic detection assembly. The circulating pipeline is provided with valves at both ends and adopts a sectional pipeline. A double-way loudspeaker quick connector is arranged between two adjacent pipelines, and a detection probe point is arranged on each pipeline.

[0047] The static detection assembly comprises a pressure gauge for detecting the pressure in the circulating pipeline. The dynamic detection assembly comprises a refrigerant detector. Each refrigerant detector is connected with a plurality of electrochemical sensors. Each electrochemical sensor corresponds to a detection probe point and is located on the outer side of each pipeline. The server stores the pipeline identification of each pipeline and the detection identification of each electrochemical sensor. Each pipeline identification and detection identification is stored in association. The server determines the corresponding pipeline that leaks according to the detection value of each electrochemical sensor.

[0048] When leakage occurs, the server transmits the judgment result, the refrigerant concentration of the leakage and the position of the leakage pipeline to the display screen for display. The server transmits a signal to the controller to control the liquid cooling unit to stop starting and control the alarm to issue a remote alarm.

[0049] The operation principle and method of the embodiment are as follows:

[0050] When the battery cell reaches the preset temperature, the direct cooling unit is ready to start, the valves at both ends of the circulating pipeline are closed, and after waiting for a preset time, the pressure value detected by the pressure gauge is transmitted to the server, the server judges whether the pressure value exceeds the change range (to avoid the influence of temperature), thereby judging whether leakage occurs, the server sends a signal to make the controller control the alarm to issue a remote alarm to notify the maintenance personnel, and the server sends a signal to make the controller control the direct cooling unit to start and run for a specified time. In the case of refrigerant circulation, the refrigerant diffuses through the leakage point, contacts and reacts with the electrochemical sensor, the electrochemical sensor closer to the leakage point detects a higher concentration and a faster increasing value, and the server obtains the pipeline identifier according to the detection identifier of the electrochemical sensor, and transmits the corresponding pipeline position and concentration data to the display screen for display.

[0051] The energy storage cabinet of the embodiment adopts the direct cooling type energy storage cabinet cooling system described in the above claims, can timely find the leakage condition and quickly detect the pipeline with the leakage point, and is convenient for maintenance personnel to quickly repair.

[0052] Embodiment Two

[0053] On the basis of the first embodiment, the energy storage system PACK refrigerant leakage detection system of the embodiment has a plurality of pressure gauges, the plurality of pressure gauges are distributed on the corresponding pipelines, each pressure gauge corresponds to a detection probe point, and the plurality of pressure gauges detect the static pressure before the direct cooling unit is operated. When the static pressure value changes, the pipeline with the leakage is judged according to the change amplitude; when the pipeline has the leakage, the pressure change amplitude of the detection probe point closer to the leakage point is larger, and the change amplitude of the detection value of the detection probe point is larger, indicating that the leakage 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 leakage point can be judged.

[0054] 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 the leakage point; when the detection probe point is not located in the middle of the pipeline but close to the next pipeline, when the leakage point appears near the detection probe point, although the approximate position of the leakage point can be judged by detection, it is not easy to determine whether the pipeline where the leakage point is located is the pipeline where the detection probe point is located or 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 with the leakage point, and the positioning is more accurate.

[0055] Embodiment Three

[0056] Refer to 2 and Figure 3On the basis of the second embodiment, the energy storage system PACK refrigerant leakage detection system of the embodiment, the circulating pipeline includes the liquid inlet pipeline 1 communicated with the direct cooling unit, further includes a liquid distribution assembly and a plurality of liquid inlet branch pipes 2, the liquid distribution assembly distributes the refrigerant in the liquid inlet pipeline 1 to the plurality of liquid inlet branch pipes 2 through a plurality of distribution ports, the plurality of liquid inlet branch pipes 2 correspond to the plurality of battery packs 7 one by one, and the flow resistance in each liquid inlet branch pipe 2 is the same; the length and the pipe diameter of each liquid inlet branch pipe 2 are equal, each liquid inlet branch pipe 2 includes a vertical part 21 and a horizontal part 22, the vertical part 21 of each liquid inlet branch pipe 2 is bent downward by 180° according to the height of the corresponding battery pack 7, and then bent by 90° to form the horizontal part 22, the length of each horizontal part 22 is the same; after the refrigerant passes through the liquid inlet hole, the refrigerant flows to the surrounding distribution holes in a scattered manner, the distribution holes are arranged in a ring around the liquid inlet hole, so that the flow into each liquid inlet branch pipe 2 is more uniform; by folding 180°, the height of each vertical part 21 can be effectively reduced, and by arranging the parallel vertical parts 21 and horizontal parts 22, the whole is more beautiful.

[0057] The liquid distribution assembly adopts a liquid distributor 3, and the distribution ports of the liquid distributor 3 are arranged in a ring, so that the refrigerant after distribution is more uniform.

[0058] The circulating pipeline further includes a liquid return pipeline 4 and a plurality of liquid return branch pipes 5, the refrigerant passing through the battery pack 7 is transmitted through the liquid return branch pipe 5, the refrigerant collected by the liquid distributor 3 is collected to the liquid return pipeline 4 and transmitted to the direct cooling unit.

[0059] The plurality of pressure gauges are distributed in the liquid inlet pipeline 1 and each liquid inlet branch pipe 2, the pressure value change range of the liquid inlet pipeline 1 is judged by the direct cooling temperature of the compressor, the pressure value change range of each liquid inlet branch pipe 2 is judged by the temperature in the battery cabinet, whether the actual pressure detected by the pressure gauge exceeds the corresponding pressure value change range is judged by the server, so as to judge whether the corresponding pipeline leaks; when the direct cooling unit is running, the refrigerant will change state according to its own temperature change, the higher the temperature, the higher the proportion of gaseous part, and the greater the pressure, the refrigerant in the transmission process is affected by the temperature of the corresponding area, so the pressure change range in the corresponding pipeline can be judged, so as to realize dynamic detection of refrigerant leakage, since when the leakage point leaks, it diffuses in the air and needs a certain time to rise to a certain concentration before reacting with the electrochemical sensor, only by monitoring the concentration, the sensitivity is low, by combining with the pressure gauge for monitoring, the sensitivity of the detection system can be improved.

[0060] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application, any non-essential changes and substitutions made by those skilled in the art on the basis of the present application all belong to the scope of protection claimed by the present application.

Claims

1. A detection system for detecting a coolant leakage of a power storage system (PACK), comprising a server, characterized by, The application 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 circulating pipeline, and the server judges whether the circulating pipeline is leaked according to the static pressure; When the direct-cooling unit is running, the dynamic detection component detects the refrigerant concentration in the battery cabin, and the server judges whether the circulating pipeline is leaked according to the refrigerant concentration; The circulating pipeline adopts a sectional pipeline, each section of the pipeline is detachably connected with adjacent pipelines, and each section of the pipeline is provided with a detection probe point; The static detection component comprises a pressure gauge for detecting the pressure in the circulating pipeline; the dynamic detection component comprises a refrigerant detector, and each refrigerant detector is connected with a plurality of electrochemical sensors, each electrochemical sensor corresponds to a detection probe point and is located on the outer side 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 identification and detection identification is stored in association, and the server judges the corresponding pipeline which is leaked according to the detection value of each electrochemical sensor; The circulating pipeline comprises a liquid inlet pipeline in communication with the direct-cooling unit, a liquid distribution component and a plurality of liquid inlet branch pipes, the liquid distribution component distributes the refrigerant in the liquid inlet pipeline to the plurality of liquid inlet branch pipes through a plurality of distribution ports, the plurality of liquid inlet branch pipes correspond to the plurality of battery packs one by one, and the flow resistance in each liquid inlet branch pipe is the same; the length and the diameter of each liquid inlet branch pipe are equal, each liquid inlet branch pipe comprises a vertical part and a horizontal part, the vertical part of each liquid inlet branch pipe is bent downward by 180° and then bent by 90° to form the horizontal part according to the height of the corresponding battery pack, and the lengths of the horizontal parts are the same.

2. The detection system for refrigerant leakage of the energy storage system PACK according to claim 1, wherein: A two-way horn quick connector is arranged between the two adjacent pipelines.

3. The detection system for refrigerant leakage of the energy storage system PACK according to claim 1, wherein: The detection system further comprises a display screen and a controller, when leakage occurs, the server transmits the judgment result, the refrigerant concentration of the leakage and the position of the leakage pipeline to the display screen for display, and the server transmits a signal to the controller to control the liquid-cooling unit to stop starting.

4. The detection system for refrigerant leakage of the energy storage system PACK according to claim 3, wherein: The detection system further comprises an alarm, when the pipeline leaks, the server transmits a signal to the controller to control the alarm to send a remote alarm.

5. The detection system for refrigerant leakage of the energy storage system PACK according to claim 1, wherein: The number of the pressure gauges is a plurality, the plurality of pressure gauges are distributed on the corresponding pipelines, each pressure gauge corresponds to a detection probe point, and a plurality of pressure gauges detect the static pressure before the direct-cooling unit is started, and when the static pressure value changes, the pipeline which leaks can be judged according to the change amplitude.

6. The detection system for refrigerant leakage of the energy storage system PACK according to claim 5, wherein: 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 leakage point.

7. The detection system for the leakage of the refrigerant of the energy storage system PACK according to claim 6, characterized in that: A plurality of said pressure gauges are distributed in the liquid inlet pipeline, each liquid inlet branch pipe, the direct cooling temperature of the compressor, the pressure value change range of the liquid inlet pipeline is judged, the temperature in the battery cabinet is judged, the pressure value change range of each liquid inlet branch pipe is judged, whether the actual pressure detected by the server exceeds the corresponding pressure value change range is judged, and whether the corresponding pipeline leaks is judged.

8. An energy storage cabinet characterized by, The detection system for the leakage of the refrigerant of the energy storage system PACK according to any one of claims 1 to 7.

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