Temperature control system for switching power supply and switching power supply temperature control method thereof

Abstract

The invention relates to the technical field of switching power supply temperature control, and provides a temperature control system for a switching power supply and a switching power supply temperature control method thereof, and the system comprises a control module which judges data transmitted by a temperature sensing module and a feedback module, and controls a power supply main circuit module or a power supply temperature module according to a judgment result; the power supply main circuit module is used for converting the voltage of the switching power supply according to the control signal of the control module; the power supply temperature module is used for adjusting the temperature of the switching power supply according to the control signal of the control module; the temperature sensing module is integrated with a temperature sensing device and is used for carrying out data acquisition on the power supply temperature module and sending the data to the feedback module and the main control module; and the feedback module processes the data of the temperature sensor module and feeds back the data to the main control module. The problem that the service life of the switching power supply is greatly shortened when the switching power supply is in a high-temperature or low-temperature state for a long time in practice is solved, the switching power supply is prevented from being out of control, and the overall performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of switching power supply temperature control, and in particular to a temperature control system for a switching power supply and a switching power supply temperature control method thereof. Background Art

[0002] A switching power supply, also known as an alternating current power supply or switching converter, is a high-frequency power conversion device and a type of power supply. Its function is to convert a voltage level to the voltage required by the user through various architectures and output the corresponding current.

[0003] With the rapid development of power electronics technology, the application areas of switching power supplies are constantly expanding. They are widely used in various occasions such as radar, industrial microwave ovens, and sewage treatment. Attention to the reliability of switching power supplies is also increasing. Temperature rise is a key factor affecting the reliability of switching power supplies. If a switching power supply is exposed to high or low temperatures for a long time, its life will be greatly shortened. Without effective control, the maximum temperature that the switching power supply assembly can withstand will be exceeded, causing the switching power supply to lose control and shorten its life. However, users often need to start the power supply at high or low temperatures or operate it for a long time. Therefore, switching power supplies often cannot meet the needs of users who need to start the power supply at high or low temperatures or operate it for a long time. Summary of the Invention

[0004] The object of the present invention is to solve at least one technical problem in the background technology and provide a temperature control system for a switching power supply and a switching power supply temperature control method thereof.

[0005] To achieve the above object, the present invention provides a temperature control system for a switching power supply, comprising: The control module judges the data transmitted by the temperature sensing module and the feedback module, and controls the power main circuit module or the power temperature module according to the judgment result; The power main circuit module converts the voltage of the switching power supply according to the control signal of the control module; The power supply temperature module adjusts the temperature of the switching power supply according to the control signal of the control module; The temperature sensing module integrates temperature sensing devices and is used to collect data from the power supply temperature module and send the data to the feedback module and the main control module; The feedback module processes the data from the temperature sensor module and feeds it back to the main control module.

[0006] According to one aspect of the present invention, the main control module controls the power main circuit module, and controls the switching power supply through the power main circuit module to achieve control of the output current, output voltage and duty cycle.

[0007] According to one aspect of the present invention, the main control module is an MCU.

[0008] According to one aspect of the present invention, the power main circuit module includes a transformer, a PWM chopper chip, a voltage stabilizing chip and a diode.

[0009] According to one aspect of the present invention, the power supply temperature module adjusts the temperature of the switching power supply through water cooling and / or air cooling.

[0010] According to one aspect of the present invention, the temperature sensing device includes a positive temperature coefficient high-precision resistor and a negative temperature coefficient high-precision resistor.

[0011] To achieve the above object, the present invention further provides a switching power supply temperature control method for a temperature control system of a switching power supply, comprising: Receive the power-on signal of the switching power supply; The temperature of the switching power supply is collected through the temperature sensing module to obtain the current temperature information of the switching power supply; According to the current temperature information, the judgment is made: when the temperature is greater than 50 degrees, the switching power supply is judged to be in a high temperature environment; when it is less than 0 degrees, the switching power supply is judged to be in a low temperature environment; at other temperatures, the switching power supply is judged to be in a normal temperature environment; When the switching power supply is in a high temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to cool the switching power supply. After cooling, the output current is increased to meet the power demand. When the switching power supply is in a normal temperature environment, it outputs power according to actual demand and monitors the temperature change of the switching power supply during operation; When the switching power supply is in a low-temperature environment, the control module controls the power main circuit module and the power temperature module to heat up the switching power supply, and after heating, the output current is increased to meet the power demand.

[0012] According to one aspect of the present invention, when a switching power supply is in a high temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to cool the switching power supply, and after cooling, increases the output current to meet the power demand, including: (1) The switching power supply is controlled through the power main circuit module to control the switching power supply to output at a low current, and then the temperature value of the switching power supply is detected through the temperature sensing module and the feedback module; (2) monitoring whether the temperature of the switching power supply exceeds a first temperature threshold of the switching power supply, and when the temperature exceeds the first temperature threshold, executing step (3); otherwise, executing step (4); (3) Continue to reduce the output current of the switching power supply, and at the same time control the power supply temperature module through the control module to increase the cooling intensity of the switching power supply, and then continue to perform step (2) until the temperature of the switching power supply is reduced to below the first temperature threshold and stabilizes, and then perform step (4); (4) The output current value of the switching power supply is controlled to increase slowly through the power main circuit module until the power requirement is met. At the same time, the temperature of the switching power supply is continuously monitored and cyclically controlled adjustments are made according to the temperature.

[0013] According to one aspect of the present invention, when the switching power supply is in a normal temperature environment, the switching power supply is output according to actual power demand, and the temperature change of the switching power supply is monitored during operation, including: (1) When the switching power supply is turned on, the power output is based on the actual power demand; (2) monitoring whether the temperature of the switching power supply exceeds a first temperature threshold of the switching power supply, and when the temperature exceeds the first temperature threshold, executing step (3); otherwise, executing step (4); (3) Turn on the cooling function. According to the temperature of the switching power supply detected in real time by the temperature sensing module, the power supply temperature module is controlled by the control module to adjust the cooling intensity of the switching power supply. When the temperature of the switching power supply is controlled below the first temperature threshold, continue to perform step (2) and monitor the temperature of the switching power supply. If the temperature of the switching power supply is controlled by the power supply temperature module to the strongest level and the switch temperature is still greater than the first temperature threshold, the power supply main circuit module is controlled by the control module to reduce the output current of the switching power supply until the temperature of the switching power supply is reduced to below the first temperature threshold and stabilized, and then perform step (4); (4) The switching power supply operates according to the actual power demand.

[0014] According to one aspect of the present invention, when the switching power supply is in a low-temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to heat the switching power supply, and after the temperature is raised, the output current is increased to meet the power demand, including: (1) The switching power supply is controlled through the power main circuit module to control the switching power supply to output in a low current manner, and then the temperature value of the switching power supply is detected through the temperature sensing module and the feedback module; (2) monitoring whether the temperature of the switching power supply is lower than a second temperature threshold of the switching power supply, and when the temperature is lower than the second temperature threshold, executing step (3); otherwise, executing step (4); (3) Continue to increase the output current of the switching power supply, and at the same time control the power supply temperature module through the control module to increase the temperature rise intensity of the switching power supply, and then continue to perform step (2) until the temperature of the switching power supply rises to above the second temperature threshold and stabilizes, and then perform step (4); (4) The output current value of the switching power supply is controlled to increase slowly through the power main circuit module until the power requirement is met. At the same time, the temperature of the switching power supply is continuously monitored and cyclically controlled adjustments are made according to the temperature.

[0015] According to the solution of the present invention, the present invention relates to a temperature control system for a switching power supply and a switching power supply temperature control method thereof, which has the advantages of being able to timely and effectively adjust the temperature when the switching power supply is in a state of excessively high or low temperature, and being able to perform normal operation, which can not only extend the service life of the switching power supply, but also improve the performance of the switching power supply, and solves the problem that the service life of the switching power supply will be greatly shortened when it is in a high or low temperature state for a long time in practice, prevents the switching power supply from losing control, and improves the overall performance.

[0016] The control module of the present invention mainly determines the data of the temperature sensor module and the data of the feedback module to control the main circuit of the power supply, such as controlling the current, voltage, and duty cycle, or controlling the power supply temperature module, thereby improving the reliability of the power supply and increasing the environmental adaptability of the power supply.

[0017] The feedback module of the present invention provides reliable data support for the control of the switching power supply, improves the stability of the switching power supply, processes different data with high precision, analyzes the data, and better processes the power supply in real time, thereby improving the robustness of the power supply control.

[0018] The power supply temperature module of the present invention is mainly an implementation module for power supply temperature control, including the implementation of temperature increase and decrease control of the power supply module, so that the switching power supply is kept within a reasonable operating temperature, thereby improving the performance of the switching power supply and extending its life. It can ensure the stable and reliable operation of the switching power supply, reduce the cost of subsequent maintenance and repair, and help increase the economic benefits of the enterprise.

[0019] The temperature sensing module of the present invention integrates various temperature sensing devices, is used to collect data from the power supply temperature module, and sends the data to the temperature feedback module and the main control module, providing data support for the control and feedback modules.

[0020] The power supply main circuit module of the present invention primarily performs voltage conversion, voltage output, and current output. This ensures stable voltage and current output under varying operating conditions, enhancing the reliability and stability of the switching power supply. This improves power supply control accuracy and enhances output stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure schematically shows a structural block diagram of a temperature control system for a switching power supply according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only intended to enable those skilled in the art to better understand and implement the present invention, rather than to imply any limitation on the scope of the present invention.

[0023] As used herein, the term "including" and variations thereof are to be interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment."

[0024] Figure 1 The following schematically shows a block diagram of a temperature control system for a switching power supply according to an embodiment of the present invention. Figure 1 As shown, in this embodiment, the temperature control system for the switching power supply includes: Control module 1, judges the data transmitted by the temperature sensing module and the feedback module, and controls the power main circuit module or the power temperature module according to the judgment result; The power supply main circuit module 2 converts the voltage of the switching power supply according to the control signal of the control module; The power supply temperature module 3 adjusts the temperature of the switching power supply according to the control signal of the control module; Temperature sensing module 4, integrated temperature sensor device, used to collect data from the power supply temperature module and send the data to the feedback module and main control module; The feedback module 5 processes (eg filters) the data from the temperature sensor module and feeds it back to the main control module.

[0025] Furthermore, according to an embodiment of the present invention, the main control module controls the power main circuit module, and controls the switching power supply through the power main circuit module to achieve control of the output current, output voltage and duty cycle.

[0026] Furthermore, according to an embodiment of the present invention, the main control module is mainly an MCU, such as a digital processing chip such as C51, DSP, etc.

[0027] Furthermore, according to one embodiment of the present invention, the power supply main circuit module includes a transformer, a PWM chopper chip, a voltage regulator chip, and a diode. The power supply main circuit module mainly converts the voltage of the power supply and is an implementation module for the voltage output size and current output size.

[0028] Furthermore, according to an embodiment of the present invention, the power supply temperature module adjusts the temperature of the switching power supply through water cooling and / or air cooling.

[0029] Furthermore, according to one embodiment of the present invention, the temperature sensor device includes a positive temperature coefficient (PTC) high-precision resistor and a negative temperature coefficient (NTC) high-precision resistor. The PTC high-precision resistor and the NTC high-precision resistor are used to integrate the temperature and calculate an accurate temperature value.

[0030] Furthermore, according to one embodiment of the present invention, the feedback module primarily processes the data from the temperature sensor module, performs appropriate filtering, and provides feedback on other data, such as voltage and current, to the main control module, which serves as the basis for the main control module's data. The main components included in the feedback module include high-precision operational amplifiers and high-precision resistors.

[0031] Furthermore, to achieve the above-mentioned object, the present invention also provides a switching power supply temperature control method for a temperature control system of a switching power supply, comprising: Receive the power-on signal of the switching power supply; The temperature of the switching power supply is collected through the temperature sensing module to obtain the current temperature information of the switching power supply; According to the current temperature information, the judgment is made: when the temperature is greater than 50 degrees, the switching power supply is judged to be in a high temperature environment; when it is less than 0 degrees, the switching power supply is judged to be in a low temperature environment; at other temperatures, the switching power supply is judged to be in a normal temperature environment; When the switching power supply is in a high temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to cool the switching power supply. After cooling, the output current is increased to meet the power demand. When the switching power supply is in a normal temperature environment, it outputs power according to actual demand and monitors the temperature change of the switching power supply during operation; When the switching power supply is in a low-temperature environment, the control module controls the power main circuit module and the power temperature module to heat up the switching power supply, and after heating, the output current is increased to meet the power demand.

[0032] Furthermore, according to an embodiment of the present invention, when the switching power supply is in a high temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to cool the switching power supply, and after cooling, increases the output current to meet the power demand, including: (1) The switching power supply is controlled through the power main circuit module to control the switching power supply to output at a low current, and then the temperature value of the switching power supply is detected through the temperature sensing module and the feedback module; (2) monitoring whether the temperature of the switching power supply exceeds a first temperature threshold (e.g., 80 degrees) of the switching power supply. If the temperature exceeds the first temperature threshold, executing step (3); otherwise, executing step (4); (3) Continue to reduce the output current of the switching power supply, and at the same time control the power supply temperature module through the control module to increase the cooling intensity of the switching power supply, and then continue to perform step (2) until the temperature of the switching power supply is reduced to below the first temperature threshold and stabilizes, and then perform step (4); (4) The output current value of the switching power supply is controlled to increase slowly through the power main circuit module until the power requirement is met. At the same time, the temperature of the switching power supply is continuously monitored and cyclically controlled and adjusted according to the temperature.

[0033] In this embodiment, the system further includes: initiating appropriate cooling measures based on the temperature of the high-temperature environment, namely, controlling the power supply temperature module through the control module, and adjusting the cooling intensity of the switching power supply through the power supply temperature module. For example, when the temperature is between 50-80 degrees Celsius, a weak cooling mode is activated, and when the temperature is greater than 80 degrees Celsius, a strong cooling mode is activated. In this embodiment, the strong cooling mode and the weak cooling mode refer to: if the cooling mode is air cooling, adjusting the fan speed to strong or weak; if the cooling mode is water cooling, adjusting the water flow to large or small; or a combination of air cooling and water cooling, controlling both the water flow and the air volume.

[0034] Furthermore, according to an embodiment of the present invention, when the switching power supply is in a normal temperature environment, the power is output according to actual demand, and the temperature change of the switching power supply is monitored during operation, including: (1) When the switching power supply is turned on, the power output is based on the actual power demand; (2) monitoring whether the temperature of the switching power supply exceeds a first temperature threshold of the switching power supply, and when the temperature exceeds the first temperature threshold, executing step (3); otherwise, executing step (4); (3) Turn on the cooling function. According to the temperature of the switching power supply detected in real time by the temperature sensing module, the power supply temperature module is controlled by the control module to adjust the cooling intensity of the switching power supply. When the temperature of the switching power supply is controlled below the first temperature threshold, continue to perform step (2) to monitor the temperature of the switching power supply. If the temperature of the switching power supply is controlled by the power supply temperature module to the strongest level and the switch temperature is still greater than the first temperature threshold, the power supply main circuit module is controlled by the control module to reduce the output current of the switching power supply until the temperature of the switching power supply is reduced to below the first temperature threshold and stabilized, and then perform step (4); (4) The switching power supply operates according to the actual power demand.

[0035] Furthermore, according to an embodiment of the present invention, when the switching power supply is in a low-temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to heat the switching power supply, and after the temperature is raised, the output current is increased to meet the power demand, including: (1) The switching power supply is controlled through the power main circuit module to control the switching power supply to output in a low current mode, and then the temperature value of the switching power supply is detected through the temperature sensing module and the feedback module; (2) monitoring whether the temperature of the switching power supply is lower than a second temperature threshold value (e.g., -20 degrees) of the switching power supply. When the temperature is lower than the second temperature threshold value, executing step (3); otherwise, executing step (4); (3) Continue to increase the output current of the switching power supply, and at the same time control the power supply temperature module through the control module to increase the temperature rise intensity of the switching power supply, and then continue to perform step (2) until the temperature of the switching power supply rises to above the second temperature threshold and stabilizes, and then perform step (4); (4) The output current value of the switching power supply is controlled to increase slowly through the power main circuit module until the power requirement is met. At the same time, the temperature of the switching power supply is continuously monitored and cyclically controlled and adjusted according to the temperature.

[0036] In this embodiment, the system further includes: activating appropriate heating measures based on the temperature of the low-temperature environment, namely, controlling the power supply temperature module through the control module, and adjusting the temperature increase strength of the switching power supply through the power supply temperature module. For example, when the temperature is between 0 and -20 degrees Celsius, a weak heating mode is activated, and when the temperature is less than -20 degrees Celsius, a strong heating mode is activated. In this embodiment, the strong and weak heating modes refer to: if the cooling mode is air cooling, adjusting the fan speed to weak or strong; if the cooling mode is water cooling, adjusting the water flow to small or large; or a combination of air cooling and water cooling, controlling both the water flow and the air volume.

[0037] According to the above-mentioned scheme of the present invention, the present invention relates to a temperature control system for a switching power supply and a switching power supply temperature control method thereof, which has the advantages of being able to timely and effectively adjust the temperature when the switching power supply is in a state of excessively high or low temperature, and being able to perform normal operation, which can not only extend the service life of the switching power supply, but also improve the performance of the switching power supply, and solves the problem that the service life of the switching power supply will be greatly shortened when it is in a high or low temperature state for a long time in practice, prevents the switching power supply from getting out of control, and improves the overall performance.

[0038] The control module of the present invention mainly determines the data of the temperature sensor module and the data of the feedback module to control the main circuit of the power supply, such as controlling the current, voltage, and duty cycle, or controlling the power supply temperature module, thereby improving the reliability of the power supply and increasing the environmental adaptability of the power supply.

[0039] The feedback module of the present invention provides reliable data support for the control of the switching power supply, improves the stability of the switching power supply, processes different data with high precision, analyzes the data, and better processes the power supply in real time, thereby improving the robustness of the power supply control.

[0040] The power supply temperature module of the present invention is mainly an implementation module for power supply temperature control, including the implementation of temperature increase and decrease control of the power supply module, so that the switching power supply is kept within a reasonable operating temperature, thereby improving the performance of the switching power supply and extending its life. It can ensure the stable and reliable operation of the switching power supply, reduce the cost of subsequent maintenance and repair, and help increase the economic benefits of the enterprise.

[0041] The temperature sensing module of the present invention integrates various temperature sensing devices, is used to collect data from the power supply temperature module, and sends the data to the temperature feedback module and the main control module, providing data support for the control and feedback modules.

[0042] The power supply main circuit module of the present invention primarily performs voltage conversion, voltage output, and current output. This ensures stable voltage and current output under varying operating conditions, enhancing the reliability and stability of the switching power supply. This improves power supply control accuracy and enhances output stability.

[0043] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0044] It should be understood that the size of the serial numbers of each step in the content of the invention and the implementation methods of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation methods of the present invention.

Claims

1. A temperature control system for a switching power supply, characterized in that: include: The control module judges the data transmitted by the temperature sensing module and the feedback module, and controls the power main circuit module or the power temperature module according to the judgment result; The power main circuit module converts the voltage of the switching power supply according to the control signal of the control module; The power supply temperature module adjusts the temperature of the switching power supply according to the control signal of the control module; The temperature sensing module integrates temperature sensing devices and is used to collect data from the power supply temperature module and send the data to the feedback module and the main control module; The feedback module processes the data from the temperature sensor module and feeds it back to the main control module.

2. The temperature control system for a switching power supply according to claim 1, characterized in that: The main control module controls the power main circuit module, and controls the switching power supply through the power main circuit module to achieve control of the output current, output voltage and duty cycle.

3. The temperature control system for a switching power supply according to claim 1, characterized in that: The main control module includes an MCU.

4. The temperature control system for a switching power supply according to claim 1, characterized in that: The power supply main circuit module includes a transformer, a PWM chopper chip, a voltage stabilizing chip and a diode.

5. The temperature control system for a switching power supply according to claim 1, characterized in that: The power supply temperature module adjusts the temperature of the switching power supply through water cooling and / or air cooling.

6. The temperature control system for a switching power supply according to any one of claims 1 to 5, characterized in that: The temperature sensor device includes a positive temperature coefficient high-precision resistor and a negative temperature coefficient high-precision resistor.

7. The switching power supply temperature control method for a temperature control system of a switching power supply according to any one of claims 1 to 6, characterized in that: include: Receive the power-on signal of the switching power supply; The temperature of the switching power supply is collected through the temperature sensing module to obtain the current temperature information of the switching power supply; According to the current temperature information, the judgment is made: when the temperature is greater than 50 degrees, the switching power supply is judged to be in a high temperature environment; when it is less than 0 degrees, the switching power supply is judged to be in a low temperature environment; at other temperatures, the switching power supply is judged to be in a normal temperature environment; When the switching power supply is in a high temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to cool the switching power supply. After cooling, the output current is increased to meet the power demand. When the switching power supply is in a normal temperature environment, it outputs power according to actual demand and monitors the temperature change of the switching power supply during operation; When the switching power supply is in a low-temperature environment, the control module controls the power main circuit module and the power temperature module to heat up the switching power supply, and after heating, the output current is increased to meet the power demand.

8. The switching power supply temperature control method according to claim 7, characterized in that: When the switching power supply is in a high temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to cool the switching power supply. After cooling, the output current is increased to meet the power demand, including: (1) The switching power supply is controlled through the power main circuit module to control the switching power supply to output at a low current, and then the temperature value of the switching power supply is detected through the temperature sensing module and the feedback module; (2) monitoring whether the temperature of the switching power supply exceeds a first temperature threshold of the switching power supply, and when the temperature exceeds the first temperature threshold, executing step (3); otherwise, executing step (4); (3) Continue to reduce the output current of the switching power supply, and at the same time control the power supply temperature module through the control module to increase the cooling intensity of the switching power supply, and then continue to perform step (2) until the temperature of the switching power supply is reduced to below the first temperature threshold and stabilizes, and then perform step (4); (4) The output current value of the switching power supply is controlled to increase slowly through the power main circuit module until the power requirement is met. At the same time, the temperature of the switching power supply is continuously monitored and cyclically controlled adjustments are made according to the temperature.

9. The switching power supply temperature control method according to claim 7, characterized in that: When the switching power supply is in a normal temperature environment, it outputs power according to actual demand and monitors the temperature changes of the switching power supply during operation, including: (1) When the switching power supply is turned on, the power output is based on the actual power demand; (2) monitoring whether the temperature of the switching power supply exceeds a first temperature threshold of the switching power supply, and when the temperature exceeds the first temperature threshold, executing step (3); otherwise, executing step (4); (3) Turn on the cooling function. According to the temperature of the switching power supply detected in real time by the temperature sensing module, the power supply temperature module is controlled by the control module to adjust the cooling intensity of the switching power supply. When the temperature of the switching power supply is controlled below the first temperature threshold, continue to perform step (2) to monitor the temperature of the switching power supply. If the temperature of the switching power supply is controlled by the power supply temperature module to the strongest level and the switch temperature is still greater than the first temperature threshold, the power supply main circuit module is controlled by the control module to reduce the output current of the switching power supply until the temperature of the switching power supply is reduced to below the first temperature threshold and stabilized, and then perform step (4); (4) The switching power supply operates according to the actual power demand.

10. The switching power supply temperature control method according to claim 7, characterized in that: When the switching power supply is in a low-temperature environment, the control module controls the power supply main circuit module and the power supply temperature module to heat up the switching power supply. After heating, the output current is increased to meet the power requirement, including: (1) The switching power supply is controlled through the power main circuit module to control the switching power supply to output in a low current manner, and then the temperature value of the switching power supply is detected through the temperature sensing module and the feedback module; (2) monitoring whether the temperature of the switching power supply is lower than a second temperature threshold of the switching power supply, and when the temperature is lower than the second temperature threshold, executing step (3); otherwise, executing step (4); (3) Continue to increase the output current of the switching power supply, and at the same time control the power supply temperature module through the control module to increase the temperature rise intensity of the switching power supply, and then continue to perform step (2) until the temperature of the switching power supply rises to above the second temperature threshold and stabilizes, and then perform step (4); (4) The output current value of the switching power supply is controlled to increase slowly through the power main circuit module until the power requirement is met. At the same time, the temperature of the switching power supply is continuously monitored and cyclically controlled adjustments are made according to the temperature.

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