Thermal management method of immersed liquid cooling charging system and charging system

Abstract

The invention discloses a thermal management method of an immersed liquid cooling charging system and the charging system, and relates to the technical field of charging. The immersed liquid cooling charging system comprises at least one charging module and at least one cooling system, each cooling system comprises a circulating pump and a cooling fan, and devices in each charging module are immersed in an insulating cooling liquid. The circulating pump is used for providing power for exchange of the high-temperature insulating cooling liquid in the charging module and the low-temperature insulating cooling liquid outside the charging module, and the cooling fan is used for cooling the high-temperature insulating cooling liquid outside the charging module; the method comprises the following steps: acquiring target parameters of each charging module in real time, wherein the target parameters comprise electrical parameters; and controlling the corresponding circulating pump and / or the corresponding cooling fan based on the target parameter of each charging module. Therefore, the problem that control lags due to the fact that temperature variables are adopted traditionally can be solved.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a thermal management method and a charging system for an immersion liquid-cooled charging system. Background Art

[0002] With the increasing popularity of electric vehicles, the performance and reliability requirements for high-power charging modules are increasing. In the design of oil-based immersion liquid-cooled charging modules, a highly insulating coolant such as mineral oil is typically used as the heat dissipation medium. Its specific heat capacity is much higher than that of air, effectively absorbing heat generated by electronic components. However, its viscosity is also much greater than that of air, necessitating a circulating pump as the main power source for its circulation control. During the heat dissipation process, the coolant absorbs heat from the electronic components within the charging module, is circulated to the outside of the module by a pump, and is cooled by a cooling fan.

[0003] Conventional technologies typically control circulation pumps and cooling fans based on temperature data from multiple points in the cooling circuit. However, because temperature is a slowly changing variable, significant hysteresis occurs during actual control. This can cause critical components to overheat before cooling occurs, negatively impacting the reliability and lifespan of the charging module. Summary of the Invention

[0004] The main purpose of this application is to provide a thermal management method and charging system for an immersion liquid-cooled charging system, which solves the problem of control lag caused by the traditional use of temperature variables by obtaining the electrical parameters of the charging module to control the corresponding circulation pump and / or the corresponding cooling fan.

[0005] To achieve the above-mentioned objectives, the present application provides a thermal management method for an immersion-type liquid-cooled charging system, wherein the immersion-type liquid-cooled charging system includes at least one charging module and at least one cooling system, each of the cooling systems including a circulation pump and a heat dissipation fan, and the components in each charging module are immersed in insulating coolant. The circulation pump is used to provide power for the exchange of high-temperature insulating coolant in the charging module and low-temperature insulating coolant outside the charging module, and the heat dissipation fan is used to cool the high-temperature insulating coolant outside the charging module; the method includes: obtaining target parameters of each charging module in real time, the target parameters including electrical parameters; and controlling the corresponding circulation pump and / or the corresponding heat dissipation fan based on the target parameters of each charging module.

[0006] Optionally, the electrical parameter includes one or more of the input voltage, output voltage, output current and power consumption of the charging module.

[0007] Optionally, the charging module includes an AC / DC front-stage circuit and a DC / DC rear-stage circuit, the input voltage of the charging module is the input voltage of the AC / DC front-stage circuit; the output voltage of the charging module is the output voltage of the DC / DC rear-stage circuit, and the output current of the charging module is the output current of the DC / DC rear-stage circuit.

[0008] Optionally, the target parameter also includes a temperature parameter, which includes one or more of the temperature of the insulating coolant in the charging module, the temperature of the radiator in the charging module, and the temperature of the temperature-sensitive device in the charging module.

[0009] Optionally, before obtaining the target parameters of each charging module in real time, the method also includes: determining the number and content of the target parameters of each charging module based on system presets; or, determining the number and content of the target parameters of each charging module based on the current operating conditions of the charging system, the current operating conditions including the power requirements of the current charging terminal or the charging module called by the current charging system. Optionally, when the charging system includes a cooling system, the control of the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module includes: determining the control parameters corresponding to each charging module based on the target parameters of each charging module; determining the system control parameters based on the control parameters corresponding to each charging module; and controlling the circulation pump and / or the cooling fan based on the system control parameters.

[0010] Optionally, when the charging system includes multiple cooling systems, the control of the corresponding circulation pump and / or the corresponding heat dissipation fan based on the target parameters of each charging module includes: determining the control parameters corresponding to each charging module based on the target parameters of each charging module; determining the system control parameters of each cooling system based on the control parameters of each charging module corresponding to each cooling system; and controlling the corresponding circulation pump and / or the corresponding heat dissipation fan of each cooling system based on the system control parameters of each cooling system.

[0011] Optionally, determining the control parameters corresponding to each charging module based on the target parameters of each charging module includes: when the target charging module in the at least one charging module corresponds to n target parameters, determining the first control variable of the target charging module based on the first target parameter among the n target parameters, where n is an integer greater than or equal to 2; determining the i-th control variable of the target charging module based on the i-th target parameter and the i-1-th control variable among the n target parameters, where i traverses from 2 to n; and determining the control parameter corresponding to the target charging module based on the n-th control variable.

[0012] Optionally, the control of the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module includes: determining the working status of the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module; controlling the corresponding circulation pump and / or the corresponding cooling fan based on the working status of the corresponding circulation pump and / or the corresponding cooling fan.

[0013] Optionally, determining the working status of the corresponding circulation pump and / or the corresponding cooling fan includes: determining whether to turn on or off the corresponding circulation pump and / or the corresponding cooling fan, or determining the speed of the corresponding circulation pump and / or the corresponding cooling fan.

[0014] In addition, to achieve the above-mentioned purpose, the present application also provides a charging system, characterized in that it includes at least two charging modules, a controller, a power distribution device and at least one charging interface; wherein the power distribution device is respectively connected to the controller, each charging module and each charging interface; the charging module is used to convert the AC power of the power grid into DC power and provide it to the charging interface; the controller is used to obtain the required power of each charging interface, and generate a scheduling instruction based on the connection relationship of the controllable switches in the power distribution device and each required power; the controller is also used to perform thermal management on the charging system based on the above-mentioned thermal management method; the power distribution device is used to control the opening or closing of the controllable switch according to the scheduling instruction to distribute the output power of each charging module to each charging interface.

[0015] This application controls the circulation pump and / or cooling fan through the electrical parameters of the charging module. Compared with the traditional thermal management method that relies on temperature variables, it can predict the temperature changes of key components, so that thermal management can be performed in advance when the device temperature has not risen significantly, solving the problem of control lag caused by the traditional use of temperature variables. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of an immersion liquid-cooled charging system provided in an embodiment of the present application; Figure 2 This is a schematic structural diagram of an immersion charging module provided in an embodiment of the present application; Figure 3 This is a schematic diagram of a control system of an immersion liquid-cooled charging system provided in an embodiment of the present application; Figure 4 This is a flow chart of a thermal management method for an immersion liquid-cooled charging system provided in an embodiment of the present application; Figure 5 This is a circuit diagram of a charging module provided in an embodiment of the present application; Figure 6Schematic diagram of a method for controlling a corresponding circulation pump and / or a corresponding cooling fan based on target parameters of a charging module provided in an embodiment of the present application; Figure 7 Schematic diagram of a method for determining corresponding control parameters based on target parameters of a charging module provided in an embodiment of the present application; Figure 8 Schematic diagram of another method for controlling a corresponding circulation pump and / or a corresponding cooling fan based on target parameters of a charging module provided by an embodiment of the present application; Figure 9 is a schematic diagram of a method for determining the number and content of target parameters of a charging module provided by an embodiment of the present application; Figure 10 2 is a schematic diagram of another method for determining the number and content of target parameters of a charging module provided by an embodiment of the present application; Figure 11 is a schematic diagram of another immersion liquid-cooled charging system provided in an embodiment of the present application; Figure 12 This is a schematic diagram of the physical structure of a controller provided in an embodiment of the present application.

[0017] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0020] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0021] For ease of understanding, the hardware structure of the immersion liquid-cooled charging system and the immersion charging module is first introduced in detail below.

[0022] Figure 1 is a schematic diagram of an immersion liquid cooling charging system provided in an embodiment of the present application, such as Figure 1 As shown, the immersion liquid-cooled charging system includes a charging module assembly, a circulation pump, a cooling fan, an oil tank, an outer casing, a return circulation pipe and other parts.

[0023] The charging module assembly is composed of one or more parallel charging modules, and the specific structure of the charging module can be found in Figure 2 It should be understood that in actual applications, the number of charging modules to be called can be flexibly configured according to the actual power requirements of the charging terminal.

[0024] The circulation pump is a speed-adjustable circulation pump, and its speed can be controlled by a pulse width modulation (PWM) signal, thereby accurately adjusting the circulation flow of the coolant.

[0025] The cooling fan is a DC fan with adjustable speed, and its speed can also be adjusted by PWM signal to adapt to different cooling requirements.

[0026] The outer casing is the protective structure of the entire immersion liquid-cooled charging system, providing mechanical support and protection.

[0027] The return circulation pipe is used to form a circulation path for the coolant, connecting the charging module, circulation pump, cooling fan and oil tank to form a complete closed-loop flow path, ensuring that the coolant can efficiently remove heat and be recycled.

[0028] The working principle of this immersion liquid-cooled charging system is as follows: the heat generated by the charging module during operation will be directly transferred to the coolant immersed in it; then, the circulating pump drives the heated high-temperature coolant to be transported to the system's heat dissipation area through a return circulation pipe; in the heat dissipation area, the cooling fan forcedly cools the high-temperature coolant to effectively reduce the oil temperature; after the heat dissipation is completed, the coolant returns to the charging module again, thus forming a complete heat exchange cycle.

[0029] Figure 2 This is a schematic diagram of the structure of an immersion charging module provided in an embodiment of the present application. Figure 2As shown in the figure, the immersion charging module mainly consists of core parts such as a sealed shell, a printed circuit board assembly (PCBA), high-insulation coolant, and liquid inlet and outlet ports.

[0030] The sealed housing contains insulating coolant, and the PCBA is immersed in the coolant, forming a completely sealed cavity to prevent leakage. The PCBA contains all power electronics and control circuitry, all immersed in the highly insulating coolant for direct heat dissipation. Current technology uses temperature sensors installed at both the inlet and outlet ports. These devices interact with an external cooling control system in real time via communication protocols such as CAN, 485, or 232 to control the circulation of the insulating coolant. The inlet and outlet ports feature specially designed check structures to effectively prevent backflow of the insulating coolant, ensuring one-way circulation.

[0031] Based on the above structure, the working principle of the immersion charging module is as follows: when the charging module is put into operation, the heat generated by the power device is directly absorbed by the surrounding insulating coolant, causing the temperature of the insulating coolant to gradually increase. The built-in temperature detection device collects the temperature data of the insulating coolant in real time. When the temperature reaches a certain threshold, the controller of the charging system starts the external cold source circulation device or adjusts the speed of the external cold source circulation device. At this time, the high-temperature insulating coolant is pumped out of the cavity of the charging module, and at the same time, the low-temperature insulating coolant treated by the external cooling system is injected into the cavity, forming a closed-loop heat exchange. The discharged high-temperature insulating coolant is cooled by the external heat sink and then re-enters the circulation system to continuously provide cooling function for the charging module.

[0032] However, this temperature feedback-based control method has obvious limitations: temperature is a slowly changing variable, and a significant hysteresis effect occurs during the actual control process, causing key components to overheat before the temperature is reduced. Specifically, when the power of the charging module suddenly increases, the heat generated takes a certain amount of time to accumulate in the coolant and be detected by the temperature detection device. This causes the control system to control the circulation pump and cooling fan based on the delayed temperature signal, often causing key components to overheat or the cooling action to lag behind actual demand. This control delay not only affects the heat dissipation efficiency, but can also adversely affect the reliability and lifespan of the charging module.

[0033] Based on this, the present application proposes a thermal management method for an immersion liquid-cooled charging system, which mainly controls the circulation pump and / or cooling fan through the electrical parameters of the charging module. Compared with the traditional thermal management method that relies on temperature variables, it can predict the temperature changes of key components, so that thermal management can be performed in advance when the device temperature has not risen significantly, solving the problem of control lag caused by the traditional use of temperature variables.

[0034] The present application solution is described in detail below with reference to the accompanying drawings.

[0035] Figure 3 This is a schematic diagram of a control system of an immersion liquid-cooled charging system provided in an embodiment of the present application. Figure 3 As shown, the control system may include at least one charging module, a circulation pump, a cooling fan and a main controller, wherein the relevant introduction of the charging module, the circulation pump and the cooling fan can be found above, and the main controller is communicatively connected with the charging module, the circulation pump and the cooling fan, and specifically can communicate through communication protocols such as CAN, 485 or 232.

[0036] In the present application, the main controller is mainly used to collect the target parameters of the charging module for the logical operation of the control strategy, and after completion, it is used to control the circulation pump and / or the cooling fan; other functions of the main controller can be found in the thermal management method of the immersion liquid-cooled charging system provided below, which will not be repeated here.

[0037] Figure 4 This is a flow chart of a thermal management method for an immersion-type liquid-cooled charging system provided in an embodiment of the present application. It should be noted that this method can be applied to an immersion-type liquid-cooled charging system, which includes at least one charging module and at least one cooling system, each cooling system including a circulation pump and a heat dissipation fan, and the devices in each charging module are immersed in insulating coolant. The circulation pump is used to provide power for the exchange of high-temperature insulating coolant in the charging module and low-temperature insulating coolant outside the charging module, and the heat dissipation fan is used to cool the high-temperature insulating coolant outside the charging module; this method can also be applied to Figure 1 or Figure 3 The cooling system involved and the charging module involved in the method can be as follows Figure 2 As shown, this application does not limit this.

[0038] Based on the above immersion liquid cooling charging system, such as Figure 4 As shown, the method may include the following steps: S410, acquiring target parameters of each charging module in real time, where the target parameters include electrical parameters.

[0039] It should be understood that the method can be executed by a controller, the target parameters of each charging module can be collected in real time by a sensor, and the controller can obtain the target parameters of each charging module from the sensor in real time.

[0040] Optionally, the electrical parameters may include one or more of the charging module's input voltage, output voltage, output current, and power consumption. For example, the electrical parameters may include any one of the input voltage, output voltage, output current, and power consumption, or a combination of multiple of the input voltage, output voltage, output current, and power consumption. The input voltage of the charging module refers to the voltage input from an external power source to the charging module; the output voltage refers to the voltage output from the charging module to a charging terminal (e.g., an electric vehicle); the output current refers to the current output by the charging module to the charging terminal; and the power consumption refers to the difference between the input power and the output power of the charging module.

[0041] In one possible implementation, Figure 5 As shown, the charging module can include an AC / DC front-stage circuit and a DC / DC back-stage circuit. The AC / DC front-stage circuit is connected to an AC power source at one end and to the DC / DC back-stage circuit at the other end, converting external AC power into DC power. The DC / DC back-stage circuit is connected to the AC / DC front-stage circuit at one end and to a charging terminal at the other end, converting the DC power output by the AC / DC front-stage circuit into the specific DC voltage and current required by the charging terminal. Based on this charging module, the input voltage of the charging module is the input voltage of the AC / DC front-stage circuit; the output voltage is the output voltage of the DC / DC back-stage circuit; the output current is the output current of the DC / DC back-stage circuit; and the power consumption is the difference between the input power of the AC / DC front-stage circuit and the output power of the DC / DC back-stage circuit.

[0042] Based on the above electrical parameters, during the operation of the charging module, the control system can predict the temperature changes of key components, so that thermal management can be carried out in advance before the device temperature rises significantly, solving the problem of control lag caused by the traditional use of temperature variables.

[0043] In one possible implementation, the target parameter may further include a temperature parameter, which may include one or more of the following: the temperature of the insulating coolant within the charging module, the temperature of the heat sink within the charging module, and the temperature of temperature-sensitive components within the charging module. The temperature of the insulating coolant within the charging module is the temperature of the coolant within the submerged sealed enclosure; the temperature of the heat sink within the charging module is the temperature of the module's internal heat sink, or may be the temperature of the heat sink where the module's switching components are located; and the temperature of temperature-sensitive components within the charging module (e.g., power semiconductors, capacitors, inductors, etc.) may be the temperature of core components that are sensitive to temperature changes and directly affect circuit performance or safety.

[0044] Optionally, when multiple temperature sampling points are included, the temperature of the insulating coolant in the above-mentioned charging module may refer to the maximum temperature, weighted sum temperature or average temperature of multiple coolant temperature sampling points; the temperature of the radiator in the charging module may refer to the maximum temperature, weighted sum temperature or average temperature of multiple radiator temperature sampling points; the temperature of the temperature sensitive device may refer to the maximum temperature, weighted sum temperature or average temperature of multiple temperature sensitive device temperature sampling points.

[0045] By combining electrical and temperature parameters, the control system can predict temperature changes in key components, predicting heat loads at the initial stage of component temperature rise based on the trend of electrical parameter changes, and adjusting the cooling strategy in advance. Furthermore, the control results of the electrical parameters can be more accurately corrected based on the temperature parameters, improving cooling efficiency while also reducing system energy consumption. For example, in a practical application, if the electrical parameters determine that both the circulation pump and the cooling fan need to operate at high speed, but the temperature parameters determine that the coolant heats up slowly or is difficult to heat up in the current environment (such as in a low-temperature environment or extremely cold weather), the circulation pump and cooling fan can be controlled to operate at low speed or not turned on to reduce system energy consumption.

[0046] Optionally, the number and types of target parameters corresponding to each charging module can be the same or different, without limitation. For example, the target parameters corresponding to charging module 1 may include input voltage; the target parameters corresponding to charging module 2 may include output current and output voltage; and the target parameters corresponding to charging module 3 may include input voltage and coolant temperature.

[0047] S420: Control the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module.

[0048] It should be noted that since the target parameters are sampled in real time in actual applications, the actual situation can be tracked in real time, and responses can be made in real time based on the actual situation to achieve the optimal control effect.

[0049] In one possible implementation, step S420 may specifically include: determining the working status of the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module; and then controlling the corresponding circulation pump and / or the corresponding cooling fan based on the working status of the corresponding circulation pump and / or the corresponding cooling fan.

[0050] Optionally, determining the working status of the corresponding circulation pump and / or the corresponding cooling fan may include: determining whether to turn on or off the corresponding circulation pump, determining whether to turn on or off the corresponding cooling fan, determining the speed of the corresponding circulation pump, determining the speed of the corresponding cooling fan, etc.

[0051] In one possible implementation, the operating status of the circulation pump and / or the corresponding cooling fan corresponding to different ranges of target parameters can be pre-set. Based on this, when the target parameters of each charging module are obtained, the operating status of the corresponding circulation pump and / or the corresponding cooling fan can be determined based on the range of the target parameters.

[0052] For example, when the target parameter includes input voltage, the working status of the circulation pump and / or the corresponding cooling fan corresponding to different ranges of input voltage can be pre-set, wherein the working status of the circulation pump and / or the corresponding cooling fan corresponding to different ranges of input voltage can be determined based on actual experimental data or experience. Based on this, when the input voltage of each charging module is obtained, the working status of the corresponding circulation pump and / or the corresponding cooling fan can be determined based on the range of the input voltage.

[0053] For another example, when the target parameter includes the coolant temperature, the working status of the circulating pump and / or the corresponding cooling fan corresponding to different ranges of coolant temperature can be pre-set, wherein the working status of the circulating pump and / or the corresponding cooling fan corresponding to different ranges of coolant temperature can be determined based on actual experimental data or experience. Based on this, when the coolant temperature of each charging module is obtained, the working status of the corresponding circulating pump and / or the corresponding cooling fan can be determined based on the range of the coolant temperature.

[0054] For another example, when the target parameters include input voltage and coolant temperature, the working states of the circulation pump and / or the corresponding cooling fan corresponding to different ranges of input voltage and coolant temperature can be pre-set respectively. Based on this, when the input voltage and coolant temperature of each charging module are obtained, the first working state of the corresponding circulation pump and / or the corresponding cooling fan can be determined based on the range of the input voltage, and the second working state of the corresponding circulation pump and / or the corresponding cooling fan can be determined based on the range of the coolant temperature, and then the final working state of the corresponding circulation pump and / or the corresponding cooling fan can be determined based on the above two working states; for example, if the speed of the circulation pump corresponding to the input voltage range is determined to be a1, and the speed of the circulation pump corresponding to the coolant temperature range is determined to be a2, then the final speed of the circulation pump can be the larger value of a1 and a2; for another example, if the speed of the circulation pump corresponding to the input voltage range is determined to be a1, and the speed of the cooling fan corresponding to the coolant temperature range is determined to be a2, then the speed of the circulation pump can be determined to be a1 and the speed of the cooling fan can be determined to be a2. It should be understood that the above examples are only for facilitating the understanding of the present application and do not constitute a limitation on the present application. In actual applications, comprehensive determination can be made based on experimental data or experience.

[0055] In one possible implementation, when the charging system includes a cooling system, the operating status of the circulating pump and / or cooling fan in the cooling system may be preliminarily determined based on the target parameters of each charging module, and then the operating status of the circulating pump and / or cooling fan in the cooling system may be comprehensively determined based on multiple results of the preliminarily determined status. When the charging system includes multiple cooling systems (where each cooling system is used to cool one or more charging modules), the operating status of the circulating pump and / or cooling fan in each cooling system may be preliminarily determined based on the target parameters of each charging module corresponding to each cooling system, and then the operating status of the circulating pump and / or cooling fan in each cooling system may be comprehensively determined based on multiple results of the preliminarily determined status of each cooling system.

[0056] In one possible implementation, when the charging system includes a cooling system, such as Figure 6 As shown, the above step S420 may specifically include the following steps: S610: Determine control parameters corresponding to each charging module based on target parameters of each charging module.

[0057] Taking the target charging module as an example, optionally, when the target charging module corresponds to one target parameter, the control variable of the target charging module can be first determined based on the target parameter, and then the control parameter of the target charging module can be determined based on the control variable of the target charging module.

[0058] For example, taking the target parameter as the input voltage Ui, the control variable of the target charging module can be determined based on the following formula (1), and then the control variable is converted into analog to digital (AD) to obtain the control parameter corresponding to the target charging module.

[0059] Y=KUi+B Formula (1) Among them, Y is the control variable of Ui dimension, K and B are the coefficients of Ui dimension.

[0060] It should be understood that the above-mentioned control variable Y can be understood as a digital signal, and its digital value can be, for example, 2 n After AD conversion, the control variable Y can be converted into a corresponding analog signal (i.e., a control parameter). This analog signal can be, for example, a voltage signal (e.g., a voltage value between 0-12V). It should be understood that this voltage signal can be used to control the corresponding circulation pump and / or cooling fan. For example, different voltages can control the circulation pump and / or cooling fan to different speeds. It should also be noted that the correspondence between the control variable and the control parameter can be pre-set based on experimental data or experience.

[0061] Optionally, when the target charging module corresponds to n target parameters, where n is an integer greater than or equal to 2, the first control variable of the target charging module can be determined based on the first target parameter among the n target parameters; then the i-th control variable of the target charging module can be determined based on the i-th target parameter and the i-1-th control variable among the n target parameters, where i traverses from 2 to n; finally, the control parameter corresponding to the target charging module is determined based on the n-th control variable.

[0062] like Figure 7 As shown, the following takes the target charging module corresponding to the following five target parameters as an example: input voltage Ui, output voltage U0, output current I0, coolant temperature Tm and radiator temperature Tc, and combines exemplary steps S710 to S760 to illustrate how to determine the control parameters of the target charging module.

[0063] S710: Determine a first control variable Y1 of the target charging module based on the first target parameter Ui among the above five target parameters.

[0064] For example, the first control variable Y1 can be determined based on the following formula (2): Y1=K1Ui+B1 formula (2) Among them, Y1 is the control variable of Ui dimension, K1 and B1 are the coefficients of Ui dimension.

[0065] S720: Determine the second control variable Y2 of the target charging module based on the second target parameter U0 and the first control variable Y1.

[0066] For example, the second control variable Y2 can be determined based on the following formula (3): Y2=K2U0+B2Y1+A1 formula (3) Among them, Y2 is the control variable of Ui and U0 dimensions, and K2, B2 and A1 are the coefficients of Ui and Uo dimensions.

[0067] S730: Determine the third control variable Y3 of the target charging module based on the third target parameter I0 and the second control variable Y2.

[0068] For example, the third control variable Y3 can be determined based on the following formula (4): Y3=K3I0+B3Y2+A2 formula (4) Among them, Y3 is the control variable of Ui, Uo and Io dimensions, and K3, B3 and A2 are the coefficients of Ui, Uo and Io dimensions.

[0069] S740: Determine the fourth control variable Y4 of the target charging module based on the fourth target parameter Tm and the third control variable Y3.

[0070] For example, the fourth control variable Y4 can be determined based on the following formula (5): Y4=K4Tm+B4Y3+A3 formula (5) Among them, Y4 is the control variable of Ui, Uo, Io and Tm dimensions, and K4, B4 and A3 are the coefficients of Ui, Uo, Io and Tm dimensions.

[0071] S750 , determining the fifth control variable Y5 of the target charging module based on the fifth target parameter Tc and the fourth control variable Y4 .

[0072] For example, the fifth control variable Y5 can be determined based on the following formula (6): Y5=K5Tc+B5Y4+A4 formula (6) Among them, Y5 is the control variable of Ui, Uo, Io, Tm and Tc dimensions, and K5, B5 and A4 are the coefficients of Ui, Uo, Io, Tm and Tc dimensions.

[0073] S760: Determine the control parameters corresponding to the target charging module based on the fifth control variable Y5.

[0074] That is, AD conversion is performed on the control variable to obtain the control parameter corresponding to the target charging module.

[0075] It should be noted that the calculation order of the above five target parameters is only an example. In actual application, it can be determined based on actual needs or experimental data analysis, and this application does not limit this.

[0076] Optionally, when the target charging module corresponds to n target parameters, where n is an integer greater than or equal to 2, taking the target parameters including input voltage Ui, output voltage U0, output current I0, coolant temperature Tm and radiator temperature Tc as an example, the control variable of the target charging module can also be determined based on the following formula (7), and then the control variable is AD converted to obtain the control parameter corresponding to the target charging module.

[0077] Y=K1Ui+K2U0+K3I0+K4Tm+K5Tc+B formula (7) Among them, Y is the control variable of Ui, Uo, Io, Tm and Tc dimensions, and K1, K2, K3, K4, K5 and B are the coefficients of Ui, Uo, Io, Tm and Tc dimensions.

[0078] It should be noted that the above coefficients can be determined through experimental data or experience, and this application does not limit this.

[0079] It should be noted that the above-mentioned step-by-step calculation method, for example, according to the hierarchical progressive logic of input voltage, output voltage, output current, coolant temperature, and radiator temperature, each parameter is sequentially included in the control variable calculation. This not only fits the actual working mechanism of power supply, output, and heat dissipation of the charging module, but also can individually debug the influence coefficient of each parameter (such as only optimizing K5 and B5 related to the heat dissipation temperature without interfering with electrical parameters). It can also flexibly add nonlinear processing or constraints, and facilitate tracing the problem link in the event of a fault. Compared with the method of equal superposition of all parameters, it is more suitable for complex systems with multi-parameter coupling, simpler debugging, and more robust control.

[0080] It should be noted that when the control power supplies of the circulation pump and the cooling fan are the same, that is, the circulation pump and the cooling fan need to be controlled synchronously based on the same control parameter, then a control parameter can be determined for the target charging module based on the above method; when the control power supplies of the circulation pump and the cooling fan are different, that is, the circulation pump and the cooling fan can be controlled synchronously or asynchronously based on different control parameters, then two control parameters can be determined for the target charging module based on the above method (which can be achieved by setting different formula coefficients), and when determining the system control parameters, two system-level control parameters can be determined separately to respectively realize the control of the circulation pump and the cooling fan.

[0081] S620: Determine system control parameters based on the control parameters corresponding to each charging module.

[0082] Specifically, after obtaining the control parameters corresponding to each charging module, the control parameters corresponding to each charging module can be maximized, averaged, or weighted summed to obtain the final system control parameters, for example, the final control voltage of the cooling system.

[0083] S630: Control the circulation pump and / or the cooling fan based on the system control parameters.

[0084] In another possible implementation, when the charging system includes multiple cooling systems, such as Figure 8 As shown, the above step S420 may specifically include the following steps: S810: Determine control parameters corresponding to each charging module based on target parameters of each charging module.

[0085] For details, please refer to the relevant introduction of step A1 above, which will not be repeated here.

[0086] S820: Determine system control parameters of each cooling system based on control parameters of each charging module corresponding to each cooling system.

[0087] That is to say, the system control parameters of each cooling system can be independently calculated based on the control parameters of each charging module corresponding to each cooling system. Among them, the calculation method of the system control parameters of each cooling system can refer to the relevant introduction of step A2 above and will not be repeated here.

[0088] S830: Control the corresponding circulation pump and / or the corresponding heat dissipation fan of each cooling system based on the system control parameters of each cooling system.

[0089] It should be noted that the above method achieves a balance between the accuracy, energy efficiency and reliability of heat dissipation control in multi-module scenarios through the layered logic of module-level control, system-level integration, and execution-end adjustment.

[0090] In one possible implementation, before executing step S410 to obtain the target parameters of each charging module in real time, the number and content of the target parameters for each charging module can be determined based on system presets. For example, if the system presets the target parameter for all charging modules as input voltage, the input voltage of all charging modules will be obtained in real time during the thermal management process. If the system presets the target parameters for charging module 1 as input voltage and coolant temperature, and the target parameter for charging module 2 as output current, the input voltage and coolant temperature of charging module 1 will be obtained in real time during the thermal management process, and the output current of charging module 2 will be obtained in real time.

[0091] In another possible implementation, before executing step S410 to obtain the target parameters of each charging module in real time, the number and content of the target parameters of each charging module can also be determined based on the current operating conditions of the charging system. The current operating conditions may include the power requirements of the current charging terminal or the charging module called by the current charging system.

[0092] For example, in low-power demand scenarios, the system can automatically reduce the monitoring range of target parameters, such as monitoring only input voltage and temporarily suspending the collection of other parameters. In high-power demand scenarios, the system can expand the monitoring range of target parameters, such as monitoring input voltage, output current, output voltage, and related temperature parameters. For another example, if it is determined that the current charging system is calling a large number of charging modules, it can be assumed that it is currently operating in a high-power state, the heat dissipation of the charging modules themselves is high, and the heat dissipation capacity of the cooling fan and circulation pump requires high precision. In this case, the monitoring range of target parameters can be expanded, such as monitoring input voltage, output current, output voltage, and related temperature parameters; otherwise, the monitoring range of target parameters can be reduced.

[0093] It should be understood that this management mode of increasing or decreasing target parameters as needed not only ensures control accuracy under complex working conditions, but also avoids the waste of computing power due to parameter redundancy under low working conditions.

[0094] As an example, Figure 9Schematic diagram of a method for determining the number and content of target parameters of a charging module provided by an embodiment of the present application. Figure 9 As shown, the method includes the following steps: S910: Obtain required charging power.

[0095] It is understandable that the charging system generally includes at least one charging module and at least one charging gun. The charging gun can be connected to a charging terminal, and the charging demand power can be sent by the charging terminal to the controller of the charging system.

[0096] S920: Determine the number and content of target parameters of each charging module according to the required power.

[0097] Alternatively, if the power demand is high, a larger number of target parameters may be determined, including both electrical and temperature parameters. If the power demand is low, a smaller number of target parameters may be determined, including both electrical and / or temperature parameters. It should be understood that whether the power demand is high or low depends on the maximum output power of the charging system and the power demand. For example, if the power demand is 40 kW and the maximum output power of the charging system is 360 kW, the power demand may be considered low. If the power demand is 40 kW and the maximum output power of the charging system is 40 kW, the power demand may be considered high.

[0098] It should be noted that, generally, the maximum output power of the charging system may be a value between 40KW and 960KW. Taking a charging system with a maximum output power of 360KW as an example, if the required power is greater than 200KW, a larger number of target parameters can be determined, such as 5 target parameters, and these 5 target parameters can be any 5 of the above-mentioned electrical parameters and temperature parameters, such as input voltage, output voltage, output circuit, coolant temperature, and radiator temperature. If the required power is less than 80KW, a smaller number of target parameters can be determined, such as 3 target parameters, and these 3 target parameters can be any 3 of the above-mentioned electrical parameters and temperature parameters, such as input voltage, coolant temperature, and radiator temperature. It should be understood that the number and content of the target parameters corresponding to the above required power are only examples, and in practice they can also be other numbers or contents, and this application does not limit this.

[0099] In one possible implementation, the number of target parameters corresponding to different required power ranges can be pre-set for different charging systems. Based on this, when the required power is obtained, the number of target parameters can be determined based on the range of the required power, and then the content of the target parameters can be randomly determined based on the number of target parameters.

[0100] In one possible implementation, the number and content of target parameters corresponding to different required power ranges can be pre-set for different charging systems. Based on this, when the required power is obtained, the number and content of the target parameters can be determined based on the range of the required power.

[0101] As another example, Figure 10 FIG. 1 is a schematic diagram of another method for determining the number and content of target parameters of a charging module provided by an embodiment of the present application. Figure 10 As shown, the method includes the following steps: S1010: Determine the charging module currently called by the charging system.

[0102] Determining the charging modules currently called by the charging system specifically refers to determining the number and position (ie, number) of the charging modules currently called by the charging system.

[0103] It should be understood that the number and location of charging modules currently deployed by the charging system may be pre-determined by the charging system based on the power demand and power allocation strategy. Specifically, the power allocation strategy may include the matching of power demand with charging modules and the deployment relationship. This power allocation strategy may consider principles such as efficiency priority and module utilization. For example, the power allocation strategy may determine the charging path based on the connection relationship between multiple charging modules and the number of available charging modules (i.e., those without faults), and determine the number of charging modules based on priority setting principles. For example, when the power demand is 40 kW, two 20 kW charging modules may be deployed, or one 40 kW charging module may be deployed. Furthermore, the decision on which charging module to deploy may be based on the relationship between the location of the charging modules in the system and the amount of heat dissipated. For example, when two 20 kW charging modules are required, deploying two adjacent charging modules will result in concentrated heat dissipation, making heat dissipation difficult. However, deploying two charging modules spaced apart will improve heat dissipation efficiency. In summary, the charging modules currently deployed by the charging system may be pre-determined by the charging system based on the power demand and power allocation strategy. This application does not limit the specific method for this determination.

[0104] S1020: Determine the number and content of target parameters of each charging module according to the charging module currently called by the charging system.

[0105] Taking a charging system with an output power of 360KW as an example, the system can include at least 9 charging modules and 2 to 6 charging guns. The power of each charging module is 40KW. Then the power range that can be called by the 2 to 6 charging guns is 0-360KW, and they correspond to the above-mentioned charging modules in sequence.

[0106] For example, if the number of charging modules called by the current charging system is less than or equal to 2, it means that the current required power is low, the system as a whole operates in a low-power state, and the heat dissipation of the charging module itself is low. A smaller number of target parameters can be determined to reduce energy consumption, such as 3 target parameters, and these 3 target parameters can be any 3 of the above-mentioned electrical parameters and temperature parameters, such as input voltage, coolant temperature, and radiator temperature.

[0107] For example, if the number of charging modules called by the current charging system is greater than or equal to 3 and less than or equal to 8, it means that the current required power is high, and a larger number of target parameters can be determined, such as 4 target parameters, and these 4 target parameters can be any 4 of the above-mentioned electrical parameters and temperature parameters, such as input voltage, output current, coolant temperature and radiator temperature.

[0108] For example, if the number of charging modules called by the current charging system is greater than or equal to 9, it means that the current power demand is higher, the system as a whole operates in a high-power state, the heat dissipation of the charging module itself is high, and the heat dissipation capacity of the system cooling fan and circulation pump requires high precision. A larger number of target parameters can be determined, such as 5 target parameters to improve the heat dissipation capacity, and these 5 target parameters can be any 5 of the above-mentioned electrical parameters and temperature parameters, such as input voltage, output current, output voltage, coolant temperature and radiator temperature.

[0109] For example, if the charging modules called by the current charging system are adjacent or relatively clustered, a larger number of target parameters can be determined to improve the heat dissipation capability, such as 5 target parameters, and these 5 target parameters can be any 5 of the above-mentioned electrical parameters and temperature parameters, such as input voltage, output current, output voltage, coolant temperature and radiator temperature.

[0110] For example, if the locations of the charging modules called by the current charging system are relatively dispersed, a smaller number of target parameters can be determined to reduce energy consumption, such as three target parameters, and these three target parameters can be any three of the above-mentioned electrical parameters and temperature parameters, such as input voltage, coolant temperature, and radiator temperature.

[0111] In one possible implementation, the number of target parameters corresponding to charging modules with different number ranges and different aggregation levels can be pre-set for different charging systems. Based on this, when the number of charging modules and the aggregation level are obtained, the number of target parameters can be determined based on the range of the number of charging modules and the aggregation level, and then the content of the target parameters can be randomly determined based on the number of target parameters.

[0112] In one possible implementation, the number and content of target parameters corresponding to charging modules with different number ranges and different aggregation levels can be pre-set for different charging systems. Based on this, when the number and aggregation level of the charging modules are obtained, the number and content of the target parameters can be determined based on the range of the number of charging modules and the aggregation level.

[0113] It should be noted that the number and content of the target parameters corresponding to the above different working conditions are only examples and do not constitute a limitation to this application. In actual operation, they can be determined in combination with experimental data and experience.

[0114] In one possible implementation, the corresponding circulation pumps and cooling fans can be controlled synchronously, for example, by turning them on or off simultaneously; or by adjusting the speeds of the corresponding circulation pumps and cooling fans synchronously. For example, when the cooling demand is low at the beginning, the pumps and cooling fans can be turned on to dissipate heat, and then their speeds can be gradually increased synchronously as the cooling demand increases.

[0115] In one possible implementation, the corresponding circulation pump and cooling fan can be controlled asynchronously. For example, when the cooling demand is low at the beginning, the pump can be turned on for cooling, and the speed of the pump can be gradually increased as the cooling demand increases; when the pump is not sufficient to meet the cooling demand, the cooling fan can be turned on, and the speed of the cooling fan can be gradually increased as the cooling demand increases; for example, when there is a cooling demand, the power consumption and noise conditions can be comprehensively considered to determine the working status of the circulation pump and the cooling fan. The above-mentioned cooling demand can be determined based on the real-time monitored power demand, the number of charging modules currently called, or the value of the target parameter, etc., and this application does not limit this. Based on this, the power consumption and environmental noise of the system can be reduced.

[0116] For example, an increase in heat dissipation demand may be considered when the power demand increases, the number of currently called charging modules increases, the coolant temperature increases, or the output current increases. It should be understood that the correspondence between the specific heat dissipation demand and the power demand, the number of currently called charging modules, or the value of the target parameter, etc., can be pre-set based on experimental data, and the correspondence between the heat dissipation demand and the operating state of the circulation pump and / or the corresponding heat dissipation fan can also be pre-set based on experimental data. Based on this, when the power demand, the number of currently called charging modules, or the value of the target parameter, etc., are obtained, the operating state of the circulation pump and / or the corresponding heat dissipation fan can be determined based on the corresponding heat dissipation demand.

[0117] Figure 11 is a schematic diagram of another immersion liquid-cooled charging system provided in an embodiment of the present application, which includes at least two charging modules 110 , a controller 130 , a power distribution device 140 and at least one charging interface 120 .

[0118] The power distribution device 140 is respectively connected to the controller 130 , each charging module 110 and each charging interface 120 ; The charging module 110 is used to convert the AC power of the power grid into DC power and provide it to the charging port; The controller 130 is used to obtain the required power of each charging interface 120 and generate a scheduling instruction based on the connection relationship of the controllable switches in the power distribution device 140 and the required power. The controller 130 is also used to perform thermal management on the charging system based on the above-mentioned thermal management method. The power distribution device 140 is used to control the opening or closing of the controllable switch according to the scheduling instruction, so as to distribute the output power of each charging module to each charging interface 120.

[0119] In an optional embodiment, the charging system provided in the embodiment of the present application is an integrated DC charging pile, and the charging interface 120 is used to connect a charging gun, which is hung on the host of the charging system through a gun mount on the charging system body.

[0120] In an optional embodiment, the charging system provided in the embodiment of the present application is a split-type DC charging pile. The charging system also includes multiple charging terminals. The charging interface 120 is used to connect the charging terminal. The charging terminal is separately arranged from the charging system body. The charging terminal is equipped with a single charging gun or a dual charging gun for outputting power to the electric vehicle.

[0121] Based on the above embodiments, the embodiments of the present application further provide a controller. Figure 12 This is a schematic diagram of the physical structure of a controller provided in an embodiment of the present application, such as Figure 12 As shown, the controller may include: a processor 1210, a communications interface 1220, a memory 1230, and a communication bus 1240. The processor 1210, the communications interface 1220, and the memory 1230 communicate with each other via the communication bus 1240. The processor 1210 may invoke the logic instructions in the memory 1230 to execute the thermal management methods for the immersion liquid-cooled charging system provided by the above-mentioned methods.

[0122] Furthermore, the logic instructions in the aforementioned memory 1230 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product, stored in a storage medium, includes instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0123] On the basis of the above embodiments, on the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the thermal management method of the immersion liquid-cooled charging system provided by the above methods.

[0124] On the basis of the above embodiments, on another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the thermal management method of the immersion liquid-cooled charging system provided by the above methods.

[0125] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0126] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A thermal management method for an immersion liquid-cooled charging system, characterized in that: The immersion liquid-cooled charging system includes at least one charging module and at least one cooling system, each cooling system including a circulation pump and a heat dissipation fan. Components in each charging module are immersed in insulating coolant. The circulation pump is used to provide power for the exchange of high-temperature insulating coolant in the charging module and low-temperature insulating coolant outside the charging module. The heat dissipation fan is used to cool the high-temperature insulating coolant outside the charging module. The method includes: acquiring target parameters of each charging module in real time, wherein the target parameters include electrical parameters; Based on the target parameters of each charging module, the corresponding circulation pump and / or the corresponding cooling fan are controlled.

2. The thermal management method according to claim 1, wherein: The electrical parameters include one or more of the input voltage, output voltage, output current and power consumption of the charging module.

3. The thermal management method according to claim 2, characterized in that: The charging module includes an AC / DC front-stage circuit and a DC / DC rear-stage circuit. The input voltage of the charging module is the input voltage of the AC / DC front-stage circuit; the output voltage of the charging module is the output voltage of the DC / DC rear-stage circuit; and the output current of the charging module is the output current of the DC / DC rear-stage circuit.

4. The thermal management method according to claim 1, wherein: The target parameter also includes a temperature parameter, which includes one or more of the temperature of the insulating coolant in the charging module, the temperature of the radiator in the charging module, and the temperature of the temperature-sensitive device in the charging module.

5. The thermal management method according to any one of claims 1 to 4, characterized in that: Before obtaining the target parameters of each charging module in real time, the method further includes: Determining the number and content of target parameters for each of the charging modules based on system presets; Alternatively, the number and content of the target parameters of each charging module are determined based on the current operating condition of the charging system, where the current operating condition includes the power demand of the current charging terminal or the charging module currently called by the charging system.

6. The thermal management method according to claim 1, characterized in that: When the charging system includes a cooling system, the controlling of the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module includes: Determining control parameters corresponding to each charging module based on target parameters of each charging module; Determining system control parameters based on the control parameters corresponding to each of the charging modules; The circulation pump and / or the cooling fan are controlled based on the system control parameters.

7. The thermal management method according to claim 1, wherein: When the charging system includes multiple cooling systems, controlling the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module includes: Determining control parameters corresponding to each charging module based on target parameters of each charging module; Determining system control parameters of each cooling system based on control parameters of each charging module corresponding to each cooling system; Based on the system control parameters of each cooling system, the corresponding circulation pump and / or the corresponding heat dissipation fan of each cooling system is controlled.

8. The thermal management method according to claim 6 or 7, characterized in that: The determining of the control parameters corresponding to each charging module based on the target parameters of each charging module includes: When a target charging module in the at least one charging module corresponds to n target parameters, determining a first control variable of the target charging module based on a first target parameter among the n target parameters, where n is an integer greater than or equal to 2; Determining an i-th control variable of the target charging module based on an i-th target parameter among the n target parameters and an i-1-th control variable, wherein i traverses from 2 to n; A control parameter corresponding to the target charging module is determined based on the nth control variable.

9. The thermal management method according to claim 1, wherein: The controlling of the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module includes: Determining the operating state of the corresponding circulation pump and / or the corresponding cooling fan based on the target parameters of each charging module; The corresponding circulation pump and / or the corresponding heat dissipation fan are controlled based on the working status of the corresponding circulation pump and / or the corresponding heat dissipation fan.

10. A charging system, characterized in that: It includes at least two charging modules, a controller, a power distribution device and at least one charging interface; The power distribution device is connected to the controller, each charging module and each charging interface respectively; The charging module is used to convert the AC power of the power grid into DC power and provide it to the charging interface; The controller is configured to obtain the power requirements of each charging port and generate a scheduling instruction based on the connection relationship of the controllable switches in the power distribution device and the power requirements; the controller is further configured to perform thermal management on the charging system based on the method of any one of claims 1 to 9; The power distribution device is used to control the opening or closing of the controllable switch according to the scheduling instruction to distribute the output power of each charging module to each charging interface.

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