Charging module assembly temperature control method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a charging module assembly temperature control method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring module temperatures of a plurality of key modules in a charging module assembly CDU; determining a CDU output power limit coefficient based on a relation among a temperature limit threshold value and a temperature recovery threshold value of each key module threshold value and the corresponding module temperature; and determining the target power of the CDU based on the rated power of the CDU and the power limiting coefficient, wherein the target power is used for indicating the maximum power allowed to be output by the CDU at present. Through accurate temperature measurement of a plurality of key modules in the CDU, active coordination management of temperature thresholds of all the modules and a whole vehicle thermal management system is combined, a power limiting coefficient is determined to control target power, accurate control of the whole vehicle thermal management system is adjusted, comprehensive and timely accurate thermal protection under complex working conditions is achieved, and the service life of the whole vehicle thermal management system is prolonged. And the CDU conversion efficiency, the service life and the operation safety are optimized and improved.

Description

Technical Field

[0001] This application relates to the field of vehicle control, and specifically to a method, apparatus, electronic device, and storage medium for temperature control of a charging module assembly. Background Technology

[0002] With the rapid development of new energy vehicles, the Conversion and Distribution Unit (CDU), as a core component of new energy vehicles, is responsible for converting AC power to DC power to charge the power battery, and simultaneously converting the high-voltage DC power from the battery to 12V to power the vehicle's low-voltage battery and system. It generates a significant amount of heat during operation. If this heat cannot be dissipated effectively and promptly, the internal temperature of the CDU will become excessively high, not only reducing its conversion efficiency and lifespan, but also potentially causing safety malfunctions such as component burnout, vehicle blackout, and loss of power.

[0003] Existing CDU control strategies mostly focus on power conversion control, power factor correction, and output rectification control. Although some designs consider thermal management, they lack precise temperature control for different critical locations and lack system matching with the vehicle's thermal management system, making it difficult to achieve efficient thermal protection for the CDU. This results in problems such as incomplete thermal management and untimely response. Summary of the Invention

[0004] In view of this, this application provides a method, apparatus, electronic device and storage medium for temperature control of a charging module assembly, in order to solve the problems of insufficient accuracy and lack of systematic and comprehensiveness in the temperature control of CDU in the prior art.

[0005] In a first aspect, embodiments of this application provide a method for temperature control of a charging module assembly, including: Obtain the module temperature of multiple key modules inside the charging module assembly (CDU); The power limiting coefficient of the CDU is determined based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module. The target power of the CDU is determined based on the rated power of the CDU and the power limitation factor, and the target power is used to indicate the maximum power that the CDU is currently allowed to output.

[0006] In one optional embodiment, the key module includes one or more of the following combinations: Power factor correction (PFC) circuits, high-voltage transformers, high-voltage direct current (HVDC) transmission modules, cooling water channels, or DC-DC converter modules.

[0007] In one optional embodiment, determining the power limiting factor of the CDU based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module includes: When the module temperature of any critical module exceeds the corresponding temperature limit threshold, the current module is confirmed to enter power limiting mode. In the power limiting mode, the power limiting sub-coefficient of the current critical module is determined based on the difference between the temperature recovery threshold corresponding to the current critical module and the module temperature, wherein the temperature recovery threshold of each critical module is less than the corresponding temperature limiting threshold. The minimum value among the power limiting sub-coefficients is determined as the power limiting coefficient of the CDU, wherein the power limiting sub-coefficient corresponding to the critical module in normal mode is 1.

[0008] In one alternative embodiment, the power limiting coefficient decreases in response to an increase in the difference between the temperature recovery threshold and the module temperature, before the power limiting coefficient reaches its minimum value.

[0009] In one optional embodiment, determining the power limiting factor of the CDU based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module includes: When the module temperature of any critical module is detected to drop below the temperature recovery threshold, it is confirmed that the current module has exited the power limiting mode.

[0010] In an optional embodiment, each key module is further configured with a corresponding over-temperature protection threshold and an over-temperature recovery threshold, wherein the over-temperature protection threshold is greater than the power limiting threshold, and the over-temperature protection threshold is greater than the over-temperature recovery threshold. The method further includes: When the module temperature of any critical module exceeds the corresponding over-temperature protection threshold, the shutdown output process of the CDU is executed. When the module temperature of all critical modules is detected to be below the corresponding over-temperature recovery threshold, the CDU restart output process is executed.

[0011] In an optional embodiment, the method further includes: Determine the operating condition of the CDU; In response to the CDU being in charging mode, the temperature limit threshold and temperature recovery threshold of the PFC circuit, the HVDC module, the high voltage transformer, and the DC-DC converter module are reduced. In response to the CDU being in inverter mode, the temperature limit threshold and temperature recovery threshold of the HVDC transmission module are reduced. In response to the CDU being in driving condition, the temperature limit threshold and temperature recovery threshold of the DC-DC DCDC module are reduced; In response to the CDU being in standby mode, the temperature limit threshold and temperature recovery threshold of each key module are increased.

[0012] In an optional embodiment, the method further includes: Obtain the temperature of each module; When the rate of temperature increase of any module exceeds a first threshold, the power output of the entire module is shut off based on hardware circuitry.

[0013] Secondly, embodiments of this application provide a charging module assembly, applied to any of the methods provided in the first aspect, including: The temperature detection module is used to obtain the module temperature of multiple key modules inside the charging module assembly (CDU). A power limiting module is used to determine the power limiting coefficient of the CDU based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module threshold. The power limiting module is further configured to determine the target power of the CDU based on the rated power of the CDU and the power limiting coefficient, wherein the target power is used to indicate the maximum power that the CDU is currently allowed to output.

[0014] Thirdly, embodiments of this application provide a vehicle including a charging module assembly (CDU) and a vehicle thermal management system, wherein the charging module assembly applies the temperature control method provided in the first aspect. The CDU determines the power limiting factor based on the module temperature of each key module and sends the power limiting factor to the vehicle thermal management system. The vehicle thermal management system adjusts the power of the cooling water pump based on the power limiting coefficient, and outputs a load limiting command based on the power limiting coefficient. The load limiting command is used to release the load connected to the charging module assembly. The power of the cooling water pump is negatively correlated with the power limiting coefficient.

[0015] Fourthly, embodiments of this application provide a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the method described in any of the first aspects.

[0016] Fifthly, embodiments of this application provide a computer program product comprising executable instructions that, when executed on a computer, cause the computer to perform the method described in any of the first aspects.

[0017] The solution provided in this application obtains the module temperatures of multiple key modules within the charging module assembly (CDU). Based on the temperature limit threshold, temperature recovery threshold, and corresponding module temperature of each key module, a power limiting coefficient for the CDU is determined. The target power of the CDU is determined based on its rated power and the power limiting coefficient, indicating the maximum power currently allowed to be output by the CDU. By accurately measuring the temperatures of multiple key modules within the CDU and combining this with the temperature thresholds of each module to determine the power limiting coefficient and control the target power, comprehensive and timely accurate thermal protection under complex operating conditions is achieved. This improves the CDU's conversion efficiency, lifespan, and operational safety, further enhancing the reliability of the vehicle system's thermal management. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart illustrating a method for temperature control of a charging module assembly provided in an embodiment of this application; Figure 2 A schematic diagram illustrating another method for controlling the temperature of a charging module assembly provided in this application embodiment; Figure 3 This is a schematic diagram of the structure of a temperature control device for a charging module assembly provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0020] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0021] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0022] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Figure 1 This is a flowchart illustrating a temperature control method for a charging module assembly provided in an embodiment of this application. This method can be applied to a microcontroller unit (MCU), such as... Figure 1 As shown, the method may include: Step 101: Obtain the module temperature of multiple key modules inside the charging module assembly (CDU).

[0025] During operation, the CDU generates a significant amount of heat. Different modules have varying structures, power densities, and heat dissipation conditions, resulting in differences in their temperature rise characteristics. To achieve precise thermal protection, independent, real-time temperature monitoring of multiple critical modules is necessary.

[0026] In one alternative embodiment, the key modules may include, but are not limited to, one or more of the following combinations: (1) Power factor correction (PFC) circuit: It is usually located at the input of CDU and is used to improve the power factor on the grid side. Its switching transistors and inductors are the main heat sources.

[0027] (2) High-voltage transformer: It realizes electrical isolation between the power grid and the DC side, and at the same time realizes the energy transmission of voltage transformation. Its magnetic core is the main heat source.

[0028] (3) High Voltage Direct Current Transmission (HVDC) Module: Responsible for rectifying the high voltage pulsating AC output of PFC, and rectifying and filtering to provide the DC power required by the battery. The switching transistors and capacitors in the module will generate heat.

[0029] (4) Cooling water channels: directly reflect the overall performance of the CDU cooling system. The temperature at its inlet, outlet or key locations can reflect the heat load of the vehicle system and the performance of the cooling system. It is the core foundation of the entire thermal management strategy.

[0030] (5) DC-DC converter module: responsible for converting high-voltage DC to a low voltage of 12V to charge the 12V battery and power the low-voltage system of the vehicle. The transformer, switching tube and rectifier tube are the core components that generate heat.

[0031] Temperature can be acquired by temperature sensors (such as thermistors, thermocouples, or digital temperature sensors) installed on the aforementioned key modules. The MCU periodically receives data collected by each temperature sensor, obtains the real-time module temperature of each key module, performs relevant calculations, and reports the data.

[0032] In one optional embodiment, to improve the accuracy of the module temperature, different temperature sensors can be placed at different locations in each critical module, and the final module temperature can be calculated using a weighted average algorithm. For example, one temperature sensor can be placed at the switching transistor, inductor, and circuit board of the PFC circuit. The MCU can obtain the original temperatures T1, T2, and T3, and the formula for calculating the module temperature can include: T = w1 T1+w2 T2+w3 T3, where T is the module temperature, and w1, w2, and w3 are the weights corresponding to T1, T2, and T3, respectively. Through weighted fusion of multiple sensor readings, the risk of misjudgment caused by individual sensor differences is effectively filtered out, making the module temperature detection closer to the actual thermal state.

[0033] Step 102: Determine the power limiting factor of the CDU based on the temperature limiting threshold, temperature recovery threshold and corresponding module temperature of each key module threshold.

[0034] The specific calculation process for the power limitation factor may include: (1) When the module temperature of any key module exceeds the corresponding temperature limit threshold, the current key module is confirmed to enter the power limit mode. In the power limit mode, the power limit sub-coefficient of the current key module is determined based on the difference between the temperature recovery threshold corresponding to the current key module and the module temperature.

[0035] The MCU configures corresponding temperature limit thresholds and temperature recovery thresholds for each key module. The temperature recovery threshold for each key module is lower than its corresponding temperature limit threshold. When the temperature of any module exceeds its corresponding temperature limit threshold, the difference between the module temperature and the corresponding temperature recovery threshold is calculated. Then, a preset formula is used to calculate the power limit coefficient for that key module based on this difference. Before the power limit coefficient reaches its minimum value, the larger the difference between the temperature recovery threshold and the module temperature, the smaller the corresponding power limit coefficient.

[0036] In one optional embodiment, the formula for calculating the power limiting sub-coefficient may include: Ki = 1 - min(1, (Ti - Tb)) 0.1), where Ki is the power limiting sub-coefficient of the i-th critical module, Ti is the module temperature, and Tb is the temperature recovery threshold. When any critical module enters power limiting mode, the larger the difference between the module temperature and the temperature recovery threshold, the smaller the calculated sub-coefficient. For every 1 degree increase in module temperature, the CDU power will decrease linearly by 10%.

[0037] In another alternative embodiment, the formula for calculating the power limiting sub-coefficient may include: Where Ki is the power limiting sub-coefficient of the i-th critical module, Ti is the module temperature, Ta is the temperature limiting threshold, and Tb is the temperature recovery threshold. For example, the temperature limiting threshold of the DC-DC converter module is 95℃, the temperature recovery threshold is 85℃, and when the module temperature reaches 100℃, Ki is calculated to be 0.2.

[0038] (2) The minimum value among the power limiting sub-coefficients is determined as the power limiting coefficient of the CDU. The power limiting sub-coefficient corresponding to the key module in normal mode is 1. For any key module, any mode other than the power limiting mode can be regarded as the normal mode, such as when the power limiting mode is not enabled (the module temperature does not exceed the temperature limiting threshold) or after exiting the power limiting mode (the module temperature drops below the temperature recovery threshold).

[0039] It is understandable that the output power of the CDU is limited by the critical modules that have the highest temperature and require the most protection.

[0040] Step 103: Determine the target power of the CDU based on its rated power and power limitation factor. The target power is used to indicate the maximum power that the CDU is currently allowed to output.

[0041] The MCU multiplies the CDU's rated power by a power limitation factor to obtain the target power. Subsequent real-time output power of the CDU must be limited to below this target power. Based on these power limitation rules, the CDU operates at full power when all critical modules are at normal temperatures; when any critical module overheats and triggers the power limitation, the CDU automatically reduces its power to decrease heat generation at the source. The higher the temperature, the lower the CDU power. In extreme overheating conditions, the CDU power can reach its theoretical minimum. Referring to the above calculation formula, the minimum CDU power is 20% of the rated power. In other embodiments, by modifying the calculation parameters, the minimum CDU power can also be other reasonable values, such as 10% of the rated power or even 0. If the temperature continues to rise, the next step of over-temperature protection will be triggered.

[0042] For each critical module that has entered power-limited mode, the MCU confirms that the current critical module has exited power-limited mode when it detects that the module temperature of any critical module has dropped below the temperature recovery threshold. Referring to the DC-DC converter module example above, when the module temperature drops to 90°C, Ki is calculated to be 0.6. When the module temperature drops below 85°C, it is determined that the module has changed from power-limited mode to normal mode. In normal mode, Ki can be regarded as 1, that is, the CDU operates based on rated power.

[0043] This application embodiment achieves precise thermal protection under varying operating conditions such as charging, multi-scenario driving, and inverter discharge by independently and in real-time measuring the temperature of multiple key modules within the CDU and dynamically limiting the CDU's output power based on the specific temperature limit thresholds and temperature recovery thresholds for each module. This ensures efficient full-power operation of the CDU when module temperatures are normal, while also linearly and regularly reducing output power to minimize heat generation when any module overheats. Emergency protection is also provided in extreme cases, and the system can report to the vehicle to alert the user, thus preventing safety malfunctions such as component burnout and vehicle power failure caused by high temperatures from the outset.

[0044] In one optional embodiment, the vehicle controller also configures corresponding over-temperature protection thresholds and over-temperature recovery thresholds for each key module, wherein the over-temperature protection threshold is greater than the over-temperature recovery threshold. Even after the power limiting mode is enabled, the module temperature may still continue to increase. When the temperature of any module exceeds the over-temperature protection threshold, the MCU can execute the CDU shutdown output procedure, such as disconnecting the main circuit contactor, stopping the transmission of drive signals, causing the CDU to stop outputting, and reporting relevant vehicle fault information. The CDU main circuit refers to the core transmission circuit from the grid side, through power conversion, to the power battery, including the AC input main circuit and the DC output main circuit. The corresponding contactors include the AC input main contactor and the DC output main contactor. When disconnecting, the DC output main contactor is disconnected first, followed by the AC input main contactor, to avoid high-voltage arcing and contact erosion.

[0045] After the CDU output is turned off, the temperature of each module will gradually decrease. When the temperature of all critical modules drops below the corresponding over-temperature recovery threshold, the MCU can execute the CDU restart output process to restart the CDU. Specifically, first check for any hardware or circuit abnormalities. If no abnormalities are found, control the contactor to close (such as the AC input main contactor and the DC output main contactor mentioned above) to restore the drive signal. After monitoring for any abnormalities, it can be confirmed that "CDU restart was successful".

[0046] In this embodiment, the MCU adopts a dual thermal protection mode of "power limiting + over-temperature shutdown" to further avoid safety faults caused by extreme high temperatures and ensure the safety and reliability of CDU operation.

[0047] In one optional embodiment, the MCU acquires the temperature of each module and monitors the status of the heat dissipation module. When it detects that the temperature rise rate of any module exceeds a first threshold, it directly shuts off the power output of the entire module based on hardware circuitry. For example, when a vehicle is AC charged outdoors at 35°C, the initial temperature of the PFC module is 80°C. After 15 minutes of charging, the cooling fan suddenly stops due to obstruction by a foreign object. The PFC module rapidly accumulates heat due to heat dissipation failure. The MCU samples the temperature data twice: at time t1 (e.g., the 10th second), the temperature is 80°C, and at time t2 (e.g., the 20th second), the temperature is 85°C. The calculated rise rate is (85-80)°C / 10s = 0.5°C / s, which exceeds the first threshold (e.g., the first threshold is 0.4°C / s). The MCU can shut off the power output through hardware circuitry, for example, by shutting off the CDU high-voltage main circuit (including the AC input main contactor and the DC output main contactor) through a MOSFET.

[0048] In one optional embodiment, the MCU can also monitor the operating conditions of the CDU in real time and dynamically adjust the temperature limit thresholds and temperature recovery thresholds corresponding to each key module based on the operating conditions. Specifically, the operating conditions of the CDU mainly include: charging condition, inverter condition, standby condition, and driving condition. The charging condition refers to the scenario where the power grid charges the power battery, and the power flow is as follows: AC input from the power grid, PFC circuit, high-voltage transformer, high-voltage direct current (HVDC) transmission module, DC-DC converter module, and power battery. When the CDU is in the charging condition, the PFC circuit (processing AC power), high-voltage transformer, and HVDC circuit module are the main heat sources, and the vehicle controller can reduce the temperature limit thresholds and temperature recovery thresholds of the PFC circuit and HVDC circuit module. The inverter condition refers to the scenario where the power battery charges external devices (such as an external fan during camping), and the power flow is as follows: power battery, high-voltage direct current (HVDC) transmission module, high-voltage transformer, PFC circuit, and AC output. When the CDU is in inverter mode, the heat source is the same as in charging mode. The MCU can lower the temperature limit threshold and temperature recovery threshold of the HVDC module and report to the user to limit the use of inverter appliances. When the CDU is in standby mode, the MCU can raise the temperature limit threshold and temperature recovery threshold of each key module, reducing the sensitivity of temperature control. Driving mode refers to the normal driving state of the vehicle. The power battery supplies power to the vehicle's central control, lights, air conditioning control unit, and other equipment. At this time, the DC-DC converter module is the only continuously operating module and is the core heat source. When the CDU is in driving mode, the MCU can lower the temperature limit threshold and temperature recovery threshold of the DC-DC converter module.

[0049] By dynamically adjusting the temperature limit threshold and temperature recovery threshold of the corresponding key modules under different operating conditions, precise thermal protection of the CDU under different operating conditions is achieved, balancing operational efficiency and safety.

[0050] In one optional embodiment, the MCU can also report the temperature changes of each module to the vehicle thermal management system, so that the vehicle thermal management system can adjust the power of the radiator pump and limit the operation of some loads. For example, when a new critical module is detected to enter a power-limiting mode, the system can increase the power of the radiator pump or suspend charging of a certain device to help the CDU cool down quickly and restore normal operation more quickly.

[0051] The method of this application embodiment will be described below using the control flow of a PFC circuit as an example. Figure 2 As shown, the method may include: Step 201: Obtain the module temperature of the PFC circuit.

[0052] The MCU controller receives the temperature of each module collected by the temperature sensor at a fixed period (e.g., 2ms). The module temperature is used for at least three logical decisions: (1) calculating the power limit coefficient and the output target power; (2) combining with an OR gate circuit to execute the CDU shutdown process when the temperature of any module exceeds the over-temperature protection threshold; (3) combining with an AND gate circuit to execute the CDU power-on process when the temperature of all modules drops below the over-temperature recovery threshold.

[0053] Step 202, calculate the power limiting factor.

[0054] When the module temperature does not exceed the temperature limit threshold, the corresponding critical module is in normal mode and does not participate in the CDU power limit calculation; alternatively, the power limit sub-coefficient can be considered as 1. When the temperature of any module exceeds the temperature limit threshold, the corresponding critical module enters power limit mode, and the vehicle controller calculates the power limit sub-coefficient for that critical module. Specifically, the power limit sub-coefficient is determined by the difference between the module temperature and the temperature recovery threshold. As the module temperature continues to rise, the power limit sub-coefficient will continuously decrease (before reaching its minimum value), and the two are negatively correlated.

[0055] Step 203: Take the minimum value as the power limitation factor.

[0056] The vehicle controller aggregates the power limiting sub-coefficients of each critical module and takes the minimum value as the power limiting coefficient of the CDU. For example, at a certain moment, the vehicle controller calculates the power limiting sub-coefficients of each critical module to be 0.3, 0.76, 0.86, and 0.4, respectively, and the power limiting coefficient of the CDU is 0.3.

[0057] Step 204, output the target power.

[0058] The MCU can obtain the target power by multiplying the rated power by the power limit factor. For example, if the CDU's rated power is 7kW, the calculated target power is 2.1kW.

[0059] Step 205: When the temperature exceeds the over-temperature protection threshold, output an over-temperature trigger signal.

[0060] When the module temperature of the PFC circuit exceeds the over-temperature protection threshold, the module will output an over-temperature trigger signal (1 = over-temperature, 0 = normal).

[0061] Step 206: The OR gate circuit determines whether the CDU is powered off.

[0062] The over-temperature trigger signal is output to an OR gate circuit, which simultaneously receives over-temperature trigger signals from other critical modules. When the over-temperature trigger signal of any critical module is "1", the overall output is 1, triggering the CDU shutdown process. When the over-temperature trigger signals of all critical modules are "0", the overall output is 0, maintaining the current operating state.

[0063] Step 207: When the temperature is below the over-temperature recovery threshold, output the CDU power-on command.

[0064] After the CDU is turned off, the temperature of the PFC circuit gradually decreases. When it drops below the over-temperature recovery threshold, it outputs a temperature recovery signal (1 = recovery, 0 = over-temperature).

[0065] Step 208: Use an AND gate circuit to determine whether the CDU is powered on.

[0066] The temperature recovery signal is output to an AND gate circuit, which simultaneously receives temperature recovery signals from other critical modules. When the temperature recovery signals of all critical modules are "1", the overall output is 1, triggering the CDU power-on process. When the temperature recovery signal of any critical module is "0", the overall output is 0, maintaining the power-off state.

[0067] The above control process achieves precise and rapid thermal management from early warning power reduction to forced shutdown by independently and in real-time monitoring and graded processing of the temperature of each key module inside the CDU. This effectively prevents thermal runaway and significantly improves the safety of the charging process and the overall service life and reliability of the CDU.

[0068] This application also provides a vehicle, including a charging module assembly (CDU) and a vehicle thermal management system. After determining a power limiting factor, the CDU sends the power limiting factor to the vehicle thermal management system. The vehicle thermal management system can adjust the power of the cooling water pump based on the power limiting factor, and output a load limiting command based on the power limiting factor. The load limiting command is used to release the load connected to the charging module assembly. The power of the cooling water pump is negatively correlated with the power limiting factor.

[0069] The operation process of the vehicle thermal management system will be explained with examples: (1) Initial state: The vehicle is AC charged in an outdoor normal temperature environment. The CDU calculates the power limiting factor K=1.0 and sends it to the vehicle thermal management system. The vehicle thermal management system controls the radiator pump to operate at the initial power (e.g., 300W) to maintain coolant circulation and heat dissipation. At the same time, it determines that the current CDU load pressure is low and does not output a load limiting command. The vehicle air conditioner, seat heating and vehicle refrigerator can be used normally.

[0070] (2) Power Limitation Triggered by Increased Load: During charging, if the user turns on the vehicle's air conditioning (cooling mode) and driver's seat heating, the increased load on the CDU causes the PFC module temperature to rise rapidly. The CDU calculates a power limitation coefficient K=0.7 based on the module temperature and reports it to the vehicle's thermal management system in real time. The thermal management system can correspondingly increase the power of the cooling water pump (e.g., increase it to 500W) and increase the coolant flow rate to enhance heat exchange efficiency. At the same time, the vehicle's thermal management system can also output a first-level load limitation command, which shuts down the seat heating and vehicle refrigerator through the vehicle controller, leaving only the vehicle's air conditioning on, in order to reduce the associated load consumption of the CDU.

[0071] (3) Dynamic adjustment based on power limiting factor: If the module temperature continues to rise, the CDU calculates a power limiting factor K=0.4. The vehicle thermal management system can further increase the power of the cooling water pump (e.g., to 800W) to maximize the cooling capacity of the coolant. At the same time, it can output a secondary load limiting command to turn off the vehicle air conditioning cooling function, retain only the CDU core charging function, and completely release unnecessary loads.

[0072] The cooling pump power is dynamically adjusted based on the power limitation coefficient, and the load is released. This retains the core comfort configuration in the early stage, and relieves the heat dissipation pressure of the CDU when the module temperature rises, thus taking into account both safety and user experience.

[0073] Figure 3 This is a schematic diagram of a charging module assembly provided in an embodiment of this application. Figure 3 As shown, the vehicle charger may include: Temperature detection module 310 is used to obtain the module temperature of multiple key modules inside the charging module assembly (CDU).

[0074] The power limiting module 320 is used to determine the power limiting coefficient of the CDU based on the temperature limiting threshold, temperature recovery threshold and corresponding module temperature of each key module threshold.

[0075] The power limiting module 320 is also used to determine the target power of the CDU based on the CDU's rated power and power limiting factor, the target power being used to indicate the maximum power that the CDU is currently allowed to output.

[0076] Corresponding to the above embodiments, this application also provides an electronic device. Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 400 may include a processor 401, a memory 402, and a communication unit 403. These components communicate through one or more buses. Those skilled in the art will understand that the structure of the electronic device shown in the figure does not constitute a limitation on the embodiment of this application. It may be a bus-shaped structure or a star-shaped structure, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0077] The communication unit 403 is used to establish a communication channel, enabling the electronic device to communicate with other devices. It receives user data from other devices or sends user data to other devices.

[0078] The processor 401 serves as the control center of the electronic device, connecting various parts of the device via interfaces and lines. It executes software programs, instructions, and / or modules stored in the memory 402, and calls data stored in the memory to perform various functions and / or process data. The processor may be composed of integrated circuits (ICs), such as a single packaged IC or multiple packaged ICs with the same or different functions connected together. For example, the processor 401 may consist only of a central processing unit (CPU). In this embodiment, the CPU may have a single processing core or include multiple processing cores.

[0079] The memory 402 is used to store the execution instructions of the processor 401. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0080] When the execution instructions in memory 402 are executed by processor 401, the electronic device 400 is able to perform some or all of the steps in the above embodiments.

[0081] In a specific implementation, this application also provides a computer storage medium, wherein the computer storage medium may store a program, which, when executed, may include some or all of the steps of the various embodiments of the charging module assembly temperature control method provided in this application. The storage medium may be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0082] In a specific implementation, this application also provides a computer program product, wherein the computer program product includes executable instructions, which, when executed on a computer, cause the computer to perform some or all of the steps in various embodiments of the charging module assembly temperature control method provided in this application.

[0083] This application also provides a non-transitory computer-readable storage medium that stores computer instructions that cause the computer to execute the charging module assembly temperature control method provided in this application.

[0084] The aforementioned non-transitory computer-readable storage medium may be any combination of one or more computer-readable media. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or flash memory, optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in connection with an instruction execution system, apparatus, or device.

[0085] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0086] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0087] Those skilled in the art will clearly understand that the techniques in the embodiments of this application can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of this application, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application or some parts of the embodiments.

[0088] The same or similar parts between the various embodiments in this specification can be referred to mutually. In particular, the device embodiments and terminal embodiments are basically similar to the method embodiments, so the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

Claims

1. A method for temperature control of a charging module assembly, characterized in that, include: Obtain the module temperature of multiple key modules inside the charging module assembly (CDU); The power limiting coefficient of the CDU is determined based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module. The target power of the CDU is determined based on the rated power of the CDU and the power limitation factor, and the target power is used to indicate the maximum power that the CDU is currently allowed to output.

2. The method according to claim 1, characterized in that, The key modules include one or more of the following combinations: Power factor correction (PFC) circuits, high-voltage transformers, high-voltage direct current (HVDC) transmission modules, cooling water channels, or DC-DC converter modules.

3. The method according to claim 1 or 2, characterized in that, The determination of the power limiting coefficient of the CDU based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module includes: When the module temperature of any critical module exceeds the corresponding temperature limit threshold, the current module is confirmed to enter power limiting mode. In the power limiting mode, the power limiting sub-coefficient of the current critical module is determined based on the difference between the temperature recovery threshold corresponding to the current critical module and the module temperature, wherein the temperature recovery threshold of each critical module is less than the corresponding temperature limiting threshold. The minimum value among the power limiting sub-coefficients is determined as the power limiting coefficient of the CDU, wherein the power limiting sub-coefficient corresponding to the critical module in normal mode is 1.

4. The method according to claim 3, characterized in that, Before the power limiting coefficient reaches its minimum value, the power limiting coefficient decreases in response to an increase in the difference between the temperature recovery threshold and the module temperature.

5. The method according to claim 3, characterized in that, The determination of the power limiting coefficient of the CDU based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module includes: When the module temperature of any critical module is detected to drop below the temperature recovery threshold, it is confirmed that the current module has exited the power limiting mode.

6. The method according to claim 1 or 2, characterized in that, Each key module is also configured with a corresponding over-temperature protection threshold and an over-temperature recovery threshold. The over-temperature protection threshold is greater than the power limiting threshold, and the over-temperature protection threshold is greater than the over-temperature recovery threshold. The method further includes: When the module temperature of any critical module exceeds the corresponding over-temperature protection threshold, the shutdown output process of the CDU is executed. When the module temperature of all critical modules is detected to be below the corresponding over-temperature recovery threshold, the CDU restart output process is executed.

7. The method according to claim 2, characterized in that, The method further includes: Determine the operating condition of the CDU; In response to the CDU being in charging mode, the temperature limit threshold and temperature recovery threshold of the PFC circuit, the HVDC module, the high voltage transformer, and the DC-DC converter module are reduced. In response to the CDU being in inverter mode, the temperature limit threshold and temperature recovery threshold of the HVDC transmission module are reduced. In response to the CDU being in driving condition, the temperature limit threshold and temperature recovery threshold of the DC-DC DCDC module are reduced; In response to the CDU being in standby mode, the temperature limit threshold and temperature recovery threshold of each key module are increased.

8. The method according to claim 1 or 2, characterized in that, The method further includes: Obtain the temperature of each module; When the rate of temperature increase of any module exceeds a first threshold, the power output of the entire module is shut off based on hardware circuitry.

9. A charging module assembly, used in the method as described in any one of claims 1 to 8, characterized in that, include: The temperature detection module is used to obtain the module temperature of multiple key modules inside the charging module assembly (CDU). A power limiting module is used to determine the power limiting coefficient of the CDU based on the temperature limiting threshold, temperature recovery threshold, and corresponding module temperature of each key module threshold. The power limiting module is further configured to determine the target power of the CDU based on the rated power of the CDU and the power limiting coefficient, wherein the target power is used to indicate the maximum power that the CDU is currently allowed to output.

10. A vehicle, comprising a charging module assembly (CDU) and a vehicle thermal management system, wherein the charging module assembly applies the temperature control methods described in 1-8. The CDU determines the power limiting factor based on the module temperature of each key module and sends the power limiting factor to the vehicle thermal management system. The vehicle thermal management system adjusts the power of the cooling water pump based on the power limiting coefficient, and outputs a load limiting command based on the power limiting coefficient. The load limiting command is used to release the load connected to the charging module assembly. in, The power of the cooling water pump is negatively correlated with the power limitation coefficient.

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