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

Abstract

The utility model provides a pulse power supply thermal management system based on phase change cold storage and time domain control, which comprises a refrigerating machine, a phase change cold storage device, a power device, a circulating pump and a control module 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 beneficial effects that the functions of constant-temperature heat dissipation, load adjustability, cold break protection and the like of the pulse power supply are realized through dynamic coupling clearance operation of the cold source, the cold storage device and the heating power device by adopting a high-cold-storage-density phase change cold storage device and a delayed cooling intervention time and active threshold value control mode; 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] This utility model relates to the field of pulse power supply thermal management technology, and in particular to a pulse power supply thermal management system based on phase change cold storage and time domain control. Background Technology

[0002] A pulse power supply is a special type of power supply that converts direct current into high-frequency pulsed current through a fast switching circuit. Pulse power supplies are widely used in high-tech research and civilian applications, and are currently developing towards higher power, higher energy density, and higher frequency. The operation of a pulse power supply generates a complex environment with coupling of multiple physical fields including electromagnetism, thermodynamics, and mechanics. The heat generated is mainly concentrated along the path of the pulse current. When a pulse power supply is used in repetitive frequency conditions, the heat inside the device is difficult to dissipate in a short time due to the low thermal conductivity of the insulating material. The heat accumulation leads to a high local temperature rise in the device, and thermal fatigue failure caused by the pulse current has become the main fault of pulse power supplies. At the same time, the temperature rise caused by the heat accumulation effect will lead to a decrease in the repetitive output accuracy of the power supply. Therefore, active thermal management is required in the actual operation of pulse power supplies.

[0003] Liquid cooling is currently the main method for thermal management of pulse power supplies, offering advantages such as rapid heat dissipation, good performance, and active controllability. However, in existing liquid-cooled thermal management systems, the accumulated heat of the system increases linearly over time. To maintain the system within a relatively stable and safe operating range, the cooling power of the cold source must also increase in the same direction as the accumulated heat generation. To meet the cooling capacity required for extreme heat dissipation, the cold source (refrigeration unit) needs to be designed according to its maximum heat dissipation power, resulting in a "powered engine for a small load" phenomenon in practical applications. Furthermore, the cooling of existing pulse power sources mainly relies on the dynamic cooling of a single chiller or cold source, leading to problems such as high power configuration, high power consumption, and large volume and weight proportions, lacking a scientific optimization path for the thermal management system.

[0004] Phase change energy 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 requires cooling or has a large power output. A phase change medium is a material that undergoes a phase change during the absorption or release of cold energy while maintaining a constant temperature throughout the process. Filling a module with a phase change medium can create a cold storage module. These modules feature high cold storage density and stable charging and releasing temperatures, allowing for the pre-storage of cold energy during high-load periods, thus transferring the cooling load and reducing the power requirements and space occupancy of the cold source. Furthermore, a cold storage device centered on the cold storage medium can effectively balance the system load, flexibly adjust the minimum and maximum power consumption, and achieve "spatiotemporal transfer" of the thermal management system's heat and cold loads. It can also operate independently of the cold source, providing protection against cold source failure. Therefore, a pulse power supply thermal management system with phase change energy storage functionality is urgently needed. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a pulse power thermal management system based on phase change cold storage and time domain control, which can solve the problems of large power configuration of cold source (refrigeration unit) and poor load regulation and lack of time-sequence energy-saving control in the existing pulse power thermal management system.

[0006] To achieve the above and other related objectives, this utility model provides the following technical solution:

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

[0008] In one embodiment of this utility model, a first three-way valve is provided on the pipeline between the refrigeration unit and the phase change cold storage device, and a second three-way valve is provided on the pipeline between the refrigeration unit and the circulating pump. The inlet and outlet of the refrigeration unit are connected to the second three-way valve and the first three-way valve respectively through quick-connect couplings. The first three-way valve and the second three-way valve are also connected by 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, and a fourth three-way valve is provided on the pipeline between the power device and the circulating pump. The third three-way valve and the fourth three-way valve are also connected by a pipeline.

[0010] In one embodiment of the present invention, the control module determines the operating mode of the pulse power thermal management system by identifying the return water temperature of the cooling medium in the pipeline of the pulse power thermal management system and the temperature of the power device. The operating mode includes a standby phase change cold storage mode, a phase change cold release cooling mode, and a combined cooling / phase change cold release cooling mode.

[0011] In one embodiment of this utility model, 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 set lower limit value is not reached, the control module controls the refrigerator to run at full load and stores the cold energy 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.

[0012] In one embodiment of this utility model, the control module is also used to identify the return water temperature and the temperature of the power devices in the cooling pipe. If the return water temperature is lower than the set upper limit and the temperature of all power devices is 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 or the temperature of any power device is higher than the set value, the control module executes the combined cooling mode of refrigeration / phase change release cooling.

[0013] In one embodiment of this utility model, when the refrigerator is in a fault state, in order to ensure the safe operation of the power source of the pulse power thermal management system, the control module executes the phase change cooling mode and delays the shutdown of the pulse power thermal management system.

[0014] As described above, the pulse power supply thermal management system based on phase change cold storage and time-domain control of this utility model has the following beneficial effects: This utility model performs continuous cooling and cold storage during the pause interval of pulse power supply discharge. During pulse discharge, the cooling load size and thermal management strategy are automatically matched according to the heat generation and frequency. The thermal management strategy includes the delayed cooling intervention time of the working fluid and the active threshold control method. Therefore, this utility model adopts a high cold storage density phase change cold storage device and a delayed cooling intervention time and active threshold control method. Through the dynamic coupling gap operation of cold source-cold storage device-heating power device, it realizes the functions of constant temperature heat dissipation, load adjustment, and cold interruption protection of pulse power supply, reduces the power configuration of external chiller and the energy consumption of pulse cycle thermal management, improves the overall operating efficiency, and has significant practical engineering benefits. Attached Figure Description

[0015] Figure 1 The diagram shows the overall structure of the pulse power supply thermal management system based on phase change cold storage and time domain control disclosed in this embodiment of the present invention.

[0016] Figure 2 The diagram shown is a schematic diagram of the standby phase change cold storage mode in the pulse power supply thermal management system based on phase change cold storage and time domain control disclosed in the embodiments of this utility model.

[0017] Figure 3 The diagram shown is a schematic diagram of the phase change cooling mode in the pulse power supply thermal management system based on phase change cold storage and time domain control disclosed in the embodiments of this utility model.

[0018] Figure 4 The diagram shown is a schematic diagram of the combined cooling mode of refrigeration / phase change release cooling in the pulse power thermal management system based on phase change cold storage and time domain control disclosed in the embodiments of this utility model.

[0019] Component designation explanation

[0020] 1. Refrigeration unit; 2. Phase change cold storage device; 3. Power device; 4. Circulating pump; 5. Control module; 6. First three-way valve; 7. Second three-way valve; 8. Quick-connect coupling; 9. Third three-way valve; 10. Fourth three-way valve. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] This utility model relates to a pulse power supply thermal management system based on phase change cold storage and time-domain control. Please refer to [link to relevant documentation]. Figure 1 The system includes a chiller 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 equipment. The control module 5 is electrically connected to the chiller 1, the phase change cold storage device 2, the power device 3, and the circulating pump 4 via wires. The outlet of the chiller 1 is connected to the inlet of the phase change cold storage device 2 via a pipe. The outlet of the phase change cold storage device 2 is connected to the inlet of the power device 3 via a pipe. The outlet of the power device 3 is connected to the inlet of the circulating pump 4 via a pipe. The outlet of the circulating pump 4 is connected to the inlet of the chiller 1 via a pipe. Temperature measuring points are provided at the phase change cold storage device 2, the power device 3, and the circulating pump 4. The temperature measuring points are electrically connected to the control module 5 via wires.

[0023] The pipeline between the chiller 1 and the phase change cold storage device 2 is equipped with a first three-way valve 6 for controlling the on / off state of the pipeline, and the pipeline between the chiller 1 and the circulating pump 4 is equipped with a second three-way valve 7 for controlling the on / off state of the pipeline. The inlet and outlet of the chiller 1 are connected to the second three-way valve 7 and the first three-way valve 6 respectively via quick-connect couplings 8. The first three-way valve 6 and the second three-way valve 7 are also connected by a pipeline. The quick-connect coupling 8 facilitates the installation and disassembly of the chiller 1 with the first three-way valve 6 and the second three-way valve 7. The pipeline between the phase change cold storage device 2 and the power device 3 is equipped with a third three-way valve 9 for controlling the on / off state of the pipeline, and the pipeline between the power device 3 and the circulating pump 4 is equipped with a fourth three-way valve 10 for controlling the on / off state of the pipeline. The third three-way valve 9 and the fourth three-way valve 10 are also connected by a pipeline.

[0024] Specifically, the type and material selection of the phase change cold storage device 2 are as follows: the type of the phase change cold storage device 2 includes, but is not limited to, shell-and-tube type phase change cold storage device 2, coil type phase change cold storage device 2, and heat pipe type phase change cold storage device 2; the phase change cold storage working medium adapted to the pulse power thermal management system is: phase change point 8℃~18℃, not limited to organic and inorganic; in this embodiment, an organic phase change material (such as n-tetradecane, octadecane, but not limited to this material) with a phase change temperature of 8℃~18℃ is selected as the cold storage agent, and a composite cold storage material with good heat transfer performance is obtained through thermally conductive composite, and then a coil type cold storage device is designed, and the prepared composite phase change cold storage material is filled into the cold storage device to complete the loading of the phase change cold storage device 2 in the pulse power thermal management system.

[0025] More specifically, the control module 5 determines the operating mode of the pulse power thermal management system by identifying the return water temperature of the cooling medium in the pipeline of the pulse power thermal management system and the temperature of the power device 3. The operating modes include standby phase change cold storage mode, phase change cold release cooling mode, and combined cooling / phase change cold release cooling mode.

[0026] Furthermore, referring to Figure 2 The standby phase change cold storage mode includes a chiller 1, a phase change cold storage device 2, a circulating pump 4, and a control module 5 for controlling the above equipment. The inlet and outlet of the chiller 1 are first connected to quick-connect couplings 8, and then 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 placed in the phase change cold storage device 2 and after the circulating pump 4, respectively, to monitor the temperature. Temperatures 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 enters the phase change cold storage device 2 through the quick-connect connector 8 and the first three-way valve 6, 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, storing cold energy. After the coolant comes out of the phase change cold storage device 2, it returns to the refrigerator 1 through the third three-way valve 9, the fourth three-way valve 10, the circulation pump 4, the second three-way valve 7 and the quick-connect connector 8, and cools down again, repeating the cycle.

[0027] Reference Figure 3The phase change 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 equipment. 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 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 placed in the phase change cold storage device 2, the power device 3, and after the circulating pump 4, respectively, to monitor temperatures T1, T2, and T3. When the system is running 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, absorbing 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 lowers the temperature of the power device 3. Then, after the coolant comes out of the power device 3, it enters the phase change cold storage device 2 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 cools down again, repeating the cycle.

[0028] Reference Figure 4 The combined cooling / phase change cold release cooling mode includes a chiller 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 equipment. The inlet and outlet of the chiller 1 are first connected to quick-connect couplings 8, and then 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 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 placed in the phase change cold storage device 2, the power device 3, and after the circulating pump 4, respectively, to monitor temperatures T1, T2, and T3. When the cooling / phase change release 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 quick-connect connector 8 and the first three-way valve 6, where it exchanges heat with the phase change cold storage material in the phase change cold storage device 2, absorbing the cold energy stored in advance by the phase change cold storage material. 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, where it exchanges heat with the high-temperature power device 3, reducing the temperature of the power device 3. Then, after the coolant comes out of the power device 3, it returns to the refrigerator 1 through the fourth three-way valve 10, the circulation pump 4, the second three-way valve 7, and the quick-connect connector 8, where it is cooled down again, and the cycle repeats.

[0029] In more detail, 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 the temperature does not reach the set lower limit (i.e., ≥5℃), the refrigerator 1 operates 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 (5℃).

[0030] Power pulse status: The control module 5 identifies the return water temperature and the temperature of the power device 3 in the cooling pipe. If the return water temperature is lower than the set upper limit (e.g., 35℃) and the temperature of all power devices 3 is lower than the set value (80℃), a single phase change release cooling mode is selected. If the return water temperature is higher than the set upper limit (e.g., 35℃) or the temperature of any power device 3 is higher than the set value (80℃), a combined cooling / phase change release cooling mode is selected, thereby achieving effective load regulation.

[0031] In the event of a refrigeration failure, when the refrigeration unit 1 is in a fault state, in order to ensure the safe operation of the power source of the pulse power thermal management system, the control module 5 will switch to the phase change release cooling mode of the cold storage device and delay shut down the pulse power thermal management system to achieve delayed cooling protection of the power system.

[0032] In summary, this utility model has the following beneficial effects: (1) It has a cold storage function, which can ensure timely high power output and cold protection; (2) The power of the cold source is reduced, the power of the system refrigeration configuration is reduced, and the power load output is improved; (3) Time and threshold control effectively reduces the system's operating energy consumption and extends the system's service life; (4) Phase change constant temperature cold release output ensures stable system cooling temperature, stable heat dissipation load, and good effect; (5) The refrigerator and cooling system adopt a quick-installation design, which can realize quick disassembly and assembly in case of failure; Thus, this utility model achieves the purpose of low power configuration of the cold source of the pulse power supply, flexible load adjustment, and low energy consumption operation, which is convenient for promotion and use.

[0033] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pulse power supply thermal management system based on phase change cold storage and time-domain control, characterized in that: The device includes a chiller (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 equipment. The outlet of the chiller (1) is connected to the inlet of the phase change cold storage device (2) through a pipe. The outlet of the phase change cold storage device (2) is connected to the inlet of the power device (3) through a pipe. The outlet of the power device (3) is connected to the inlet of the circulating pump (4) through a pipe. The outlet of the circulating pump (4) is connected to the inlet of the chiller (1) through a pipe. Temperature measuring points are provided at the phase change cold storage device (2), the power device (3), and the circulating pump (4). The temperature measuring points are electrically connected to the control module (5) through wires.

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

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

4. The pulse power supply thermal management system based on phase change cold storage and time-domain control according to claim 1, characterized in that: The control module (5) determines the operating mode of the pulse power thermal management system by identifying the return water temperature of the cooling medium in the pipeline of the pulse power thermal management system and the temperature of the power device (3). The operating modes include standby phase change cold storage mode, phase change cold release cooling mode and cooling / phase change cold release combined cooling mode.

5. The pulse power supply thermal management system based on phase change cold storage and time-domain control according to claim 1, 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 set lower limit value is not reached, the refrigerator (1) is controlled to run at full load to store 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.

6. The pulse power supply thermal management system based on phase change cold storage and time-domain control according to claim 1, characterized in that: The control module (5) is also used to identify the return water temperature and the temperature of the power device (3) in the cooling pipe. If the return water temperature is lower than the set upper limit and the temperature of all power devices (3) is lower than the set value, the control module (5) executes the phase change release cooling mode. If the return water temperature is higher than the set upper limit or the temperature of any power device (3) is higher than the set value, the control module (5) executes the combined cooling mode of refrigeration / phase change release cooling.

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

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