Pulse power supply thermal management system and method based on phase change cold storage and time domain control

Abstract

The invention provides a pulse power supply thermal management system and method based on phase change cold storage and time domain control, and the system comprises a refrigerating machine, a phase change cold storage device, a power device, a circulating pump, and a control module which is used for controlling the refrigerating machine, the phase change cold storage device, the power device and the circulating pump. An outlet of the phase change cold storage device is connected with an inlet of the power device through a pipeline, an outlet of the power device is connected with an inlet of the circulating pump through a pipeline, and an outlet of the circulating pump is connected with an inlet of the refrigerating machine through a pipeline. The pulse power supply has the following beneficial effects that the functions of constant-temperature heat dissipation, adjustable load, cold break protection and the like of the pulse power supply are realized through dynamic coupling clearance operation of the cold source-cold storage device-heating power device by adopting the high-cold-storage-density phase change cold storage device and a delayed cooling intervention time and active threshold control method; power configuration and pulse period heat management energy consumption of the external refrigerator are reduced, and the overall operation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pulse power supply thermal management, and in particular to a pulse power supply thermal management system and method based on phase change cold storage and time domain control. Background Art

[0002] A pulse power supply is a special power supply that converts direct current into high-frequency pulse power by means of a fast switching circuit. Pulse power supplies are widely used in high-tech research and civilian fields, and are currently developing towards high power, high energy storage density, and high frequency. The operation of a pulse power supply will produce a complex environment of coupled electric, magnetic, thermal, and mechanical multi-physical fields, and the heat generated is mainly concentrated on the path through which the pulse current passes. When a pulse power supply is applied to a repetitive frequency operating condition, due to the low thermal conductivity of the insulating material, the heat inside the device is difficult to diffuse in a short period of time, and the heat accumulation causes a high local temperature rise in the device. The thermal fatigue failure of the device caused by the pulse current has become the main fault of the pulse power supply. At the same time, the temperature rise of the device caused by the heat accumulation effect will cause the repeated output accuracy of the power supply to decrease. Therefore, active thermal management is required in the actual operation of the pulse power supply.

[0003] Liquid cooling is the main method of thermal management of pulse power supplies at present. This method has the advantages of fast heat dissipation, good effect, and active control. However, in the existing liquid-cooled thermal management system, since the accumulated heat of the system tends to increase linearly over time, in order to keep the system in a relatively stable and safe working range, the cooling power of the cold source must also increase at the same rate as the accumulated heat. In order to meet the cooling capacity of the extreme heat dissipation, the cold source (refrigerator) needs to be designed according to the maximum heat dissipation power, resulting in the phenomenon of "a big horse pulling a small cart" in actual applications. In addition, the cooling of existing pulse power sources mainly relies on the dynamic cooling of a single refrigerator or cold source, which has problems such as high power configuration, high power consumption, and large volume to weight ratio, and lacks a scientific thermal management system optimization path.

[0004] Phase change cold storage is an energy storage and regulation technology that stores cold energy in a phase change medium in advance and releases it when the equipment needs cold energy or the power output is large. Phase change medium refers to a material that absorbs or releases cold energy with a phase change when absorbing or releasing cold energy, and its own temperature remains unchanged during this process. The phase change medium can be filled into a module and used as a cold storage module. The cold storage module has the characteristics of high cold storage density and stable charging and releasing cold temperature. It can store cold energy in high-load periods in advance, realize the transfer of cooling load, and reduce the power configuration and space occupancy of the cold source. In addition, the cold storage device with cold storage medium as the core can balance the system load well, flexibly adjust the minimum and maximum power consumption of the system, realize the "time and space transfer" of the cold and hot loads of the thermal management system, and can operate independently from the cold source to realize "cold" protection. Therefore, a pulse power supply thermal management system with phase change cold storage function is urgently needed. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a pulse power supply thermal management system and method based on phase change cold storage and time domain control, which is used to solve the problems of large power configuration of the cold source (refrigerator) of the existing pulse power supply thermal management system, poor load adjustability and no time-sequential energy-saving control.

[0006] To achieve the above objectives and other related objectives, the present invention provides the following technical solutions:

[0007] A pulse power supply thermal management system based on phase change cold storage and time domain control includes a refrigerator, a phase change cold storage device, a power device, a circulating pump and a control module for controlling the above-mentioned equipment, wherein the outlet of the refrigerator is connected to the inlet of the phase change cold storage device through a pipeline, the outlet of the phase change cold storage device is connected to the inlet of the power device through a pipeline, the outlet of the power device is connected to the inlet of the circulating pump through a pipeline, and the outlet of the circulating pump is connected to the inlet of the refrigerator through a pipeline, and temperature measuring points are provided at the phase change cold storage device, the power device and the circulating pump, and the temperature measuring points are electrically connected to the control module through wires.

[0008] In one embodiment of the present invention, a first three-way valve is provided on the pipeline between the refrigerator and the phase change cold storage device, a second three-way valve is provided on the pipeline between the refrigerator and the circulating pump, and the inlet and outlet of the refrigerator are respectively connected to the second three-way valve and the first three-way valve through quick-release connectors, and the first three-way valve and the second three-way valve are also connected through a pipeline.

[0009] In one embodiment of the present invention, a third three-way valve is provided on the pipeline between the phase change cold storage device and the power device, a fourth three-way valve is provided on the pipeline between the power device and the circulation pump, and the third three-way valve and the fourth three-way valve are also connected by a pipeline.

[0010] A pulse power supply thermal management method based on phase change cold storage and time domain control, the method is based on the pulse power supply thermal management system based on phase change cold storage and time domain control, including: the control module determines the operation mode of the pulse power supply thermal management system by identifying the return water temperature of the cooling medium in the pulse power supply thermal management system pipeline and the temperature of the power device, wherein the operation mode includes a standby phase change cold storage mode, a phase change cold release cooling mode, and a refrigeration / phase change cold release combined cooling mode

[0011] In one embodiment of the present invention, the standby phase change cold storage mode includes: when the standby phase change cold storage mode is operated under the control of the control module: the low-temperature coolant in the refrigerator enters the phase change cold storage device through the first three-way valve, and exchanges heat with the phase change cold storage material in the phase change cold storage device. At this time, the phase change cold storage material changes from liquid to solid and is used to store cold energy; after the coolant comes out of the phase change cold storage device, it passes through the third three-way valve, the fourth three-way valve, the circulation pump and the second three-way valve and returns to the refrigerator, and then cools down again and repeats the cycle; wherein, in the standby phase change cold storage mode, the control module is used to monitor the temperature in the phase change cold storage device and the power device.

[0012] In one embodiment of the present invention, the phase change cold release cooling mode includes: when the phase change cold release cooling mode is operated under the control of the control module: the coolant exchanges heat with the phase change cold storage material in the phase change cold storage device, absorbs the cold stored in advance by the phase change cold storage material, and the phase change cold storage material changes from solid to liquid. After the low-temperature coolant comes out of the phase change cold storage device, it enters the power device through the third three-way valve and exchanges heat with the high-temperature power device. Subsequently, after the coolant comes out of the power device, it passes through the fourth three-way valve, the circulation pump, the second three-way valve and the first three-way valve and enters the phase change cold storage device, and then cools down again and repeats the cycle; wherein, in the phase change cold release cooling mode, the control module is used to monitor the temperature in the phase change cold storage device, the power device and the circulation pump.

[0013] In one embodiment of the present invention, the refrigeration / phase change cold release combined cooling mode includes: when the refrigeration / phase change cold release combined cooling mode is operated under the control of the control module: the low-temperature coolant in the refrigerator enters the phase change cold storage device through the first three-way valve, exchanges heat with the phase change cold storage material in the phase change cold storage device, absorbs the cold stored in advance by the phase change cold storage material, and the phase change cold storage material changes from solid to liquid; after the low-temperature coolant comes out of the phase change cold storage device, it enters the power device through the third three-way valve, exchanges heat with the high-temperature power device, and then the coolant comes out of the power device and passes through the fourth three-way valve, the circulation pump and the second three-way valve and returns to the refrigerator, and then cools down again and repeats the cycle; wherein, in the refrigeration / phase change cold release combined cooling mode, the control module is used to monitor the temperature in the phase change cold storage device, the power device and the circulation pump.

[0014] In one embodiment of the present invention, the control module is also used to identify the temperature of the phase change cold storage material in the phase change cold storage device. If the temperature does not reach the set lower limit value, the refrigerator is controlled to operate at full load and the cold energy is stored in the phase change cold storage device until the temperature of the phase change cold storage material in the phase change cold storage device reaches the set lower limit value.

[0015] In one embodiment of the present invention, the control module is also used to identify the return water temperature and the temperature of the power device in the cooling pipe. If the return water temperature is lower than the set upper limit value and the temperatures of all power devices are lower than the set value, the control module executes the phase change release cooling mode; if the return water temperature is higher than the set upper limit value or the temperature of any power device is higher than the set value, the control module executes the refrigeration / phase change release cooling mode.

[0016] In one embodiment of the present invention, when the refrigerator is in a fault state, in order to ensure the safe operation of the power source of the pulse power supply thermal management system, the control module executes a phase change cooling mode and delays the shutdown of the pulse power supply thermal management system.

[0017] As described above, the pulse power supply thermal management system and method based on phase change cold storage and time domain control of the present invention have the following beneficial effects: the present invention performs continuous cooling and cold storage during the pause interval of the pulse power supply discharge, and automatically matches the cooling load size and the thermal management strategy according to the heat generation and frequency during the pulse discharge, wherein the thermal management strategy includes the delayed cooling intervention time of the working fluid and the active threshold control method; therefore, the present invention adopts a high cold storage density phase change cold storage device and a delayed cooling intervention time and an active threshold control method, and operates through the dynamic coupling gap of the cold source-cold storage device-heating power device, thereby realizing the functions of constant temperature heat dissipation, load adjustment, and cold-break protection of the pulse power supply, reducing the power configuration of the external refrigerator and the energy consumption of the pulse cycle thermal management, improving the overall operating efficiency, and having significant practical engineering benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic diagram of the overall structure of a pulse power supply thermal management system based on phase change cold storage and time domain control disclosed in an embodiment of the present invention;

[0019] Figure 2 Shown is a schematic diagram of a standby phase change cold storage mode in a pulse power supply thermal management method based on phase change cold storage and time domain control disclosed in an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram showing a phase change cold release cooling mode in a pulse power supply thermal management method based on phase change cold storage and time domain control disclosed in an embodiment of the present invention;

[0021] Figure 4 Shown is a schematic diagram of the refrigeration / phase change cold release combined cooling mode in the pulse power supply thermal management method based on phase change cold storage and time domain control disclosed in an embodiment of the present invention.

[0022] Component number description

[0023] 1. Refrigerator; 2. Phase change cold storage device; 3. Power device; 4. Circulation pump; 5. Control module; 6. First three-way valve; 7. Second three-way valve; 8. Quick connector; 9. Third three-way valve; 10. Fourth three-way valve. DETAILED DESCRIPTION

[0024] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] The first embodiment of the present invention relates to a pulse power supply thermal management system based on phase change cold storage and time domain control, please refer to Figure 1 , comprising a refrigerator 1, a phase change cold storage device 2, a power device 3, a circulating pump 4 and a control module 5 for controlling the above-mentioned devices, the control module 5 is electrically connected to the refrigerator 1, the phase change cold storage device 2, the power device 3 and the circulating pump 4 through wires; the outlet of the refrigerator 1 is connected to the inlet of the phase change cold storage device 2 through a pipeline, the outlet of the phase change cold storage device 2 is connected to the inlet of the power device 3 through a pipeline, the outlet of the power device 3 is connected to the inlet of the circulating pump 4 through a pipeline, and the outlet of the circulating pump 4 is connected to the inlet of the refrigerator 1 through a pipeline, and the phase change cold storage device 2, the power device 3 and the circulating pump 4 are all provided with temperature measuring points, and the temperature measuring points are electrically connected to the control module 5 through wires;

[0026] Among them, a first three-way valve 6 for controlling the on-off of the pipeline is provided on the pipeline between the refrigerator 1 and the phase change cold storage device 2, and a second three-way valve 7 for controlling the on-off of the pipeline is provided on the pipeline between the refrigerator 1 and the circulating pump 4, and the inlet and outlet of the refrigerator 1 are respectively connected to the second three-way valve 7 and the first three-way valve 6 through a quick-release connector 8, and the first three-way valve 6 and the second three-way valve 7 are also connected by a pipeline. The function of the quick-release connector 8 is to facilitate the installation of the refrigerator 1 and the first three-way valve 6 and the second three-way valve 7; a third three-way valve 9 for controlling the on-off of the pipeline is provided on the pipeline between the phase change cold storage device 2 and the power device 3, and a fourth three-way valve 10 for controlling the on-off of the pipeline is provided on the pipeline between the power device 3 and the circulating pump 4, and the third three-way valve 9 and the fourth three-way valve 10 are also connected by a pipeline.

[0027] Specifically, the type of phase change cold storage device 2 is determined and the material is selected: the types of phase change cold storage device 2 include but are not limited to shell and tube phase change cold storage device 2, coil phase change cold storage device 2 and heat pipe phase change cold storage device 2; the phase change cold storage working fluid suitable for the pulse power supply thermal management system is: phase change point 8°C ~ 18°C, not limited to organic and inorganic.

[0028] The second embodiment of the present invention relates to a pulse power supply thermal management method based on phase change cold storage and time domain control, including: the control module 5 determines the operation mode of the pulse power supply thermal management system by identifying the return water temperature of the cooling medium in the pulse power supply thermal management system pipeline and the temperature of the power device 3, wherein the operation mode includes a standby phase change cold storage mode, a phase change cold release cooling mode and a refrigeration / phase change cold release combined cooling mode.

[0029] Specifically, in this embodiment, an organic phase change material with a phase change temperature of 8°C to 18°C ​​(such as n-tetradecane and octadecane, but not limited to this material) is selected as a coolant, and a composite cool storage material with good heat transfer performance is obtained through thermal conductivity compounding; then a coil-type cool storage device is designed, and the prepared composite phase change cool storage material is sealed in the cool storage device to complete the loading of the phase change cool storage device 2 in the pulse power supply thermal management system.

[0030] More specifically, refer to Figure 2 The standby phase change cold storage mode includes a refrigerator 1, a phase change cold storage device 2, a circulating pump 4 and a control module 5 for controlling the above devices. The inlet and outlet of the refrigerator 1 are first connected to the quick-release connector 8, and then connected to the second three-way valve 7 and the first three-way valve 6 respectively. The inlet and outlet of the phase change cold storage device 2 are connected to the first three-way valve 6 and the third three-way valve 9 respectively. The inlet and outlet of the circulating pump 4 are connected to the fourth three-way valve 10 and the second three-way valve 7 respectively. The temperature measuring points of the control module 5 are respectively placed in the phase change cold storage device 2 and after the circulating pump 4 to monitor the temperature respectively. Degrees T1 and T3; when the standby phase change cold storage mode is operated under the control of the control module 5: the low-temperature coolant in the refrigerator 1 passes through the quick-release connector 8 and the first three-way valve 6, and then enters the phase change cold storage device 2, and exchanges heat with the phase change cold storage material in the phase change cold storage device 2. The phase change cold storage material changes from liquid to solid to store cold energy. After the coolant comes out of the phase change cold storage device 2, it passes through the third three-way valve 9, the fourth three-way valve 10, the circulating pump 4, the second three-way valve 7 and the quick-release connector 8 and then returns to the refrigerator 1, cools down again, and repeats the cycle.

[0031] Reference Figure 3The phase change cold release cooling mode includes a phase change cold storage device 2, a power device 3, a circulating pump 4 and a control module 5 for controlling the above-mentioned devices; the inlet and outlet of the phase change cold storage device 2 are respectively connected to the first three-way valve 6 and the third three-way valve 9, the inlet and outlet of the power device 3 are respectively connected to the third three-way valve 9 and the fourth three-way valve 10, and the inlet and outlet of the circulating pump 4 are respectively connected to the fourth three-way valve 10 and the second three-way valve 7; the temperature measuring points of the control module 5 are respectively placed in the phase change cold storage device 2, in the power device 3 and after the circulating pump 4, and the temperatures T1, T2 and T3 are respectively monitored; the phase change cold release cooling mode When the formula is operated under the control of the control module 5, the coolant exchanges heat with the phase change cold storage material in the phase change cold storage device 2, absorbs the cold stored in advance by the phase change cold storage material, and the phase change cold storage material changes from solid to liquid; the low-temperature coolant comes out of the phase change cold storage device 2 and passes through the third three-way valve 9 to enter the power device 3, exchanges heat with the high-temperature power device 3, and reduces the temperature of the power device 3. Subsequently, the coolant comes out of the power device 3 and passes through the fourth three-way valve 10, the circulation pump 4, the second three-way valve 7 and the first three-way valve 6 to enter the phase change cold storage device 2, and is cooled again, and the cycle is repeated.

[0032] Reference Figure 4 The refrigeration / phase change cold release combined cooling mode includes a refrigerator 1, a phase change cold storage device 2, a power device 3, a circulation pump 4 and a control module 5 for controlling the above-mentioned equipment. The inlet and outlet of the refrigerator 1 are first connected to the quick-release connector 8, and then connected to the second three-way valve 7 and the first three-way valve 6 respectively. The inlet and outlet of the phase change cold storage device 2 are connected to the first three-way valve 6 and the third three-way valve 9 respectively. The inlet and outlet of the power device 3 are connected to the third three-way valve 9 and the fourth three-way valve 10 respectively. The inlet and outlet of the circulation pump 4 are connected to the fourth three-way valve 10 and the second three-way valve 7 respectively; the temperature measuring points of the control module 5 are respectively placed in the phase change cold storage device 2, the power device 3 and after the circulation pump 4, and the temperatures T1, T2 and T3 are monitored respectively; the When the refrigeration / phase change cold release combined cooling mode is operated under the control of the control module 5, the low-temperature coolant in the refrigerator 1 passes through the quick-release connector 8 and the first three-way valve 6, and then enters the phase change cold storage device 2, exchanges heat with the phase change cold storage material in the phase change cold storage device 2, absorbs the cold stored in advance by the phase change cold storage material, and the phase change cold storage material changes from solid to liquid. After the low-temperature coolant comes out of the phase change cold storage device 2, it passes through the third three-way valve 9 and enters the power device 3, exchanges heat with the high-temperature power device 3, and reduces the temperature of the power device 3. Subsequently, the coolant comes out of the power device 3 and passes through the fourth three-way valve 10, the circulation pump 4, the second three-way valve 7 and the quick-release connector 8 and returns to the refrigerator 1, cools down again, and repeats the cycle.

[0033] Furthermore, in the power standby state: the control module 5 identifies the temperature of the phase change cold storage material in the phase change cold storage device 2. If it does not reach the set lower limit value (i.e. ≥5°C), the refrigerator 1 runs at full load and stores the cold energy in the phase change cold storage device 2 until the temperature of the phase change cold storage material in the phase change cold storage device 2 reaches the set lower limit value (5°C).

[0034] Power pulse state: the control module 5 identifies the return water temperature in the cooling pipe and the temperature of the power device 3. If the return water temperature is lower than the set upper limit value (such as 35°C) and the temperature of all power devices 3 is lower than the set value (80°C), a single phase change cooling mode is selected; if the return water temperature is higher than the set upper limit value (such as 35°C) or the temperature of any power device 3 is higher than the set value (80°C), the refrigeration / phase change cooling combined supply cooling mode is selected to achieve effective load regulation.

[0035] Refrigeration fault state: when the refrigerator 1 is in a fault state, in order to ensure the safe operation of the power source of the pulse power supply thermal management system, the control module 5 will switch to the phase change cold release cooling mode of the cold storage device, and delay the shutdown of the pulse power supply thermal management system to achieve delayed cooling protection of the power supply system.

[0036] In summary, the present invention has the following beneficial effects: (1) With the function of cold storage, timely high-power output and refrigeration "cold" protection can be guaranteed; (2) The power of the cold source is reduced, the power of the system refrigeration configuration is reduced, and the effective output of the power load is improved; (3) Time and threshold control effectively reduces the energy consumption of the system operation and extends the service life of the system; (4) Phase change constant temperature cold release output, the system cooling temperature is stable, the heat dissipation load is stable and the effect is good; (5) The refrigerator and the cooling system adopt a quick-install design, which can realize rapid disassembly and assembly in case of faults; thereby, the present invention achieves the purpose of low-power configuration of the cold source of the pulse power supply, flexible load adjustment and low-energy operation, which is convenient for promotion and use.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A pulse power supply thermal management system based on phase change cold storage and time domain control, characterized by: The invention comprises a refrigerator (1), a phase change cold storage device (2), a power device (3), a circulation pump (4) and a control module (5) for controlling the above-mentioned devices, wherein the outlet of the refrigerator (1) is connected to the inlet of the phase change cold storage device (2) through a pipeline, the outlet of the phase change cold storage device (2) is connected to the inlet of the power device (3) through a pipeline, the outlet of the power device (3) is connected to the inlet of the circulation pump (4) through a pipeline, and the outlet of the circulation pump (4) is connected to the inlet of the refrigerator (1) through a pipeline, and the phase change cold storage device (2), the power device (3) and the circulation pump (4) are all provided with temperature measuring points, and the temperature measuring points are electrically connected to the control module (5) through wires.

2. According to claim 1, the pulse power supply thermal management system based on phase change cold storage and time domain control is characterized in that: A first three-way valve (6) is provided on the pipeline between the refrigerator (1) and the phase-change cold storage device (2), a second three-way valve (7) is provided on the pipeline between the refrigerator (1) and the circulation pump (4), and the inlet and outlet of the refrigerator (1) are respectively connected to the second three-way valve (7) and the first three-way valve (6) through quick-release connectors (8), and the first three-way valve (6) and the second three-way valve (7) are also connected through a pipeline.

3. The pulse power supply thermal management system based on phase change cold storage and time domain control according to claim 1 is characterized in that: A third three-way valve (9) is provided on the pipeline between the phase-change cold storage device (2) and the power device (3), a fourth three-way valve (10) is provided on the pipeline between the power device (3) and the circulation pump (4), and the third three-way valve (9) and the fourth three-way valve (10) are also connected via a pipeline.

4. A pulse power supply thermal management method based on phase change cold storage and time domain control, characterized in that: The method is based on the pulse power supply thermal management system based on phase change cold storage and time domain control according to any one of claims 1 to 3, comprising: The control module (5) determines the operation mode of the pulse power supply thermal management system by identifying the return water temperature of the cooling medium in the pulse power supply thermal management system pipeline and the temperature of the power device (3), wherein the operation mode includes a standby phase change cold storage mode, a phase change cold release cooling mode and a refrigeration / phase change cold release combined cooling mode.

5. The pulse power supply thermal management method based on phase change cold storage and time domain control according to claim 4 is characterized in that: The standby phase change cold storage mode includes: When the standby phase change cold storage mode is operated under the control of the control module (5): the low-temperature coolant in the refrigerator (1) enters the phase change cold storage device (2) through the first three-way valve (6) and exchanges heat with the phase change cold storage material in the phase change cold storage device (2). At this time, the phase change cold storage material changes from liquid to solid and is used to store cold energy; after the coolant comes out of the phase change cold storage device (2), it passes through the third three-way valve (9), the fourth three-way valve (10), the circulation pump (4) and the second three-way valve (7) and then returns to the refrigerator (1), and then cools down again and repeats the cycle; wherein, in the standby phase change cold storage mode, the control module (5) is used to monitor the temperature in the phase change cold storage device (2) and the power device (3).

6. The pulse power supply thermal management method based on phase change cold storage and time domain control according to claim 4 is characterized in that: The phase change cooling mode includes: When the phase-change cold release cooling mode is operated under the control of the control module (5): the coolant exchanges heat with the phase-change cold storage material in the phase-change cold storage device (2), absorbs the cold stored in advance by the phase-change cold storage material, and the phase-change cold storage material changes from solid to liquid. After the low-temperature coolant comes out of the phase-change cold storage device (2), it enters the power device (3) through the third three-way valve (9) and exchanges heat with the high-temperature power device (3). Subsequently, after the coolant comes out of the power device (3), it passes through the fourth three-way valve (10), the circulation pump (4), the second three-way valve (7) and the first three-way valve (6) and enters the phase-change cold storage device (2), and then cools down again and repeats the cycle; wherein, in the phase-change cold release cooling mode, the control module (5) is used to monitor the temperature in the phase-change cold storage device (2), the power device (3) and the circulation pump (4).

7. The pulse power supply thermal management method based on phase change cold storage and time domain control according to claim 4 is characterized in that: The refrigeration / phase change cooling combined cooling mode includes: When the refrigeration / phase change cold release combined cooling mode is operated under the control of the control module (5): the low-temperature coolant in the refrigerator (1) enters the phase change cold storage device (2) through the first three-way valve (6), exchanges heat with the phase change cold storage material in the phase change cold storage device (2), absorbs the cold energy stored in advance by the phase change cold storage material, and the phase change cold storage material changes from solid to liquid; after the low-temperature coolant comes out of the phase change cold storage device (2), it enters the power device (3) through the third three-way valve (9), exchanges heat with the high-temperature power device (3), and then after the coolant comes out of the power device (3), it passes through the fourth three-way valve (10), the circulation pump (4) and the second three-way valve (7) and returns to the refrigerator (1), and then cools down again, repeating the cycle; wherein, in the refrigeration / phase change cold release combined cooling mode, the control module (5) is used to monitor the temperature in the phase change cold storage device (2), the power device (3) and the circulation pump (4).

8. The pulse power supply thermal management method based on phase change cold storage and time domain control according to claim 4 is characterized in that: The control module (5) is also used to identify the temperature of the phase change cold storage material in the phase change cold storage device (2); if the temperature does not reach a set lower limit, the refrigerator (1) is controlled to operate at full load to store cold in the phase change cold storage device (2) until the temperature of the phase change cold storage material in the phase change cold storage device (2) reaches a set lower limit.

9. The pulse power supply thermal management method based on phase change cold storage and time domain control according to claim 4 is characterized in that: The control module (5) is also used to identify the return water temperature in the cooling pipe and the temperature of the power device (3). If the return water temperature is lower than a set upper limit value and the temperatures of all power devices (3) are lower than the set value, the control module (5) executes a phase change cooling mode; if the return water temperature is higher than a set upper limit value or the temperature of any power device (3) is higher than the set value, the control module (5) executes a refrigeration / phase change cooling mode.

10. The pulse power supply thermal management method based on phase change cold storage and time domain control according to claim 4 is characterized in that: When the refrigerator (1) is in a faulty state, in order to ensure the safe operation of the power source of the pulse power supply thermal management system, the control module (5) executes a phase change cooling mode and delays the shutdown of the pulse power supply thermal management system.

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