Automobile Charging Thermal Management Control Method, System, Electronic Device and Storage Medium

Abstract

The present invention provides a method, a system, an electronic device and a storage medium for controlling the thermal management of vehicle charging. The method includes: when starting to charge, immediately identifying the output current capacity of the charging pile, determining the corresponding cooling level, and comprehensively determining the duty ratio of the coolant water pump according to the ambient temperature, so as to achieve pre-cooling in advance for high-power fast charging. During the charging process, the present invention further adjusts the compressor power in real time according to the coolant temperature to achieve the stability of the coolant temperature. The present invention also aims at the defect that the temperature of the connection port from the high-voltage wiring harness to the battery pack is not monitored during the existing high-power fast charging process, and specially sets a temperature sensor inside the fast charging connector on the battery pack to monitor the temperature change at this connection port in real time, thereby further reducing the problem of overheating and fire during high-power fast charging.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle charging, and more particularly, to a method, system, electronic device and storage medium for controlling the thermal management of vehicle charging. Background Art

[0002] With the development of electric vehicles, the high-power fast charging technology for electric vehicles has become a development trend. High-power fast charging brings a good charging experience to users by rapidly increasing the charging rate. Currently, high-power fast charging is achieved by increasing the voltage platform and the charging current, aiming to achieve a fast charging capacity of 600A. However, the current DC fast charging on the market generally does not exceed 250A. When the charging current is increased to 600A, it will bring an increase in heat, thus putting pressure on the vehicle's thermal management system. At the same time, the traditional fast charging cooling method is that during the charging process, when the coolant temperature rises, the vehicle control unit (VCU) then controls the duty ratio of the water pump and the power of the air conditioning compressor to cool the coolant. This method is more suitable for lower charging powers. However, when the charging power increases, especially during ultra-fast charging, due to the rapid temperature rise, therefore, cooling after the coolant temperature has risen has a poor effect and cannot meet the requirements of high-power fast charging. In addition, the current fast charging system only detects the temperature at the connection of the high-voltage wiring harness inside the charging socket, and there is a blind spot for the connection port from the high-voltage wiring harness to the battery pack. When the charging current is increased, there may be a risk of overheating or even fire at the connection port from the high-voltage wiring harness to the battery pack, and temperature monitoring and protection are required. Summary of the Invention

[0003] The present invention provides a method, system, electronic device and storage medium for controlling the thermal management of vehicle charging to solve the technical problems existing in the prior art.

[0004] According to a first aspect of the present invention, there is provided a method for controlling the thermal management of vehicle charging, including:

[0005] S1. When starting to charge, obtain the maximum output current capacity of the charging pile;

[0006] S2. Determine the cooling level of the cooling system according to the maximum output current capacity of the charging pile;

[0007] S3. Obtain the current ambient temperature, and control the duty ratio of the coolant water pump according to the cooling level and the current ambient temperature;

[0008] S4. During the charging process, collect the coolant temperature, and control the power of the air conditioning compressor according to the coolant temperature.

[0009] Based on the above technical solutions, the present invention can also be improved as follows.

[0010] Preferably, determining the cooling level of the cooling system according to the maximum output current capacity of the charging pile in step S2 includes:

[0011] Setting the corresponding relationship between the cooling level of the cooling system and the range of the maximum output current capacity of the charging pile;

[0012] Determining the cooling level of the cooling system corresponding to the maximum output current capacity of the charging pile according to the range in which the maximum output current capacity of the charging pile falls.

[0013] Preferably, determining the cooling level of the cooling system corresponding to the maximum output current capacity of the charging pile according to the range in which the maximum output current capacity of the charging pile falls includes:

[0014] When the maximum output current capacity of the charging pile is less than 250A, determining that the cooling level of the cooling system is Level1;

[0015] When the maximum output current capacity of the charging pile is between 250A and 400A, determining that the cooling level of the cooling system is Level2;

[0016] When the maximum output current capacity of the charging pile is between 400A and 600A, determining that the cooling level of the cooling system is Level3.

[0017] Preferably, controlling the duty ratio of the coolant pump according to the cooling level and the current ambient temperature in step S3 includes:

[0018] Setting the corresponding relationship between the duty ratio of the coolant pump and the cooling level, and the corresponding relationship between the duty ratio of the coolant pump and the range of the current ambient temperature;

[0019] Determining the duty ratio of the coolant pump corresponding to the cooling level and the current ambient temperature according to the range in which the cooling level and the current ambient temperature fall.

[0020] Preferably, determining the duty ratio of the coolant pump corresponding to the cooling level and the current ambient temperature according to the range in which the cooling level and the current ambient temperature fall includes:

[0021] When the cooling level of the cooling system is Level1 and the current ambient temperature < 45°C, controlling the duty ratio of the coolant pump to be 80%;

[0022] When the cooling level of the cooling system is Level1 and the current ambient temperature > 45°C, controlling the duty ratio of the coolant pump to be 100%;

[0023] When the cooling level of the cooling system is Level 2 or Level 3, control the duty ratio of the coolant water pump to 100%.

[0024] Preferably, in step S4, controlling the power of the air-conditioning compressor according to the coolant temperature includes:

[0025] Set the corresponding relationship between the power of the air-conditioning compressor and the coolant temperature range;

[0026] According to the range of the coolant temperature, determine the power of the air-conditioning compressor corresponding to the coolant temperature.

[0027] Preferably, the determining the power of the air-conditioning compressor corresponding to the coolant temperature according to the range of the coolant temperature includes:

[0028] When the coolant temperature is lower than 40°C, control the power of the air-conditioning compressor to 0 kw;

[0029] When the coolant temperature is between 40°C and 50°C, control the power of the compressor to 4 kw;

[0030] When the coolant temperature is higher than 50°C, control the power of the compressor to 7 kw.

[0031] Preferably, after step S4, it further includes:

[0032] S5. During the charging process, collect the positive temperature T1 and negative temperature T2 of the high-voltage wire harness inside the fast-charging connector on the battery pack, and the positive temperature T3 and negative temperature T4 of the high-voltage wire harness at the fast-charging socket end, and adjust the charging current according to the collected temperatures T1, T2, T3, and T4.

[0033] Preferably, the adjusting the charging current according to the collected temperatures T1, T2, T3, and T4 specifically includes:

[0034] When any one of the temperatures T1, T2, T3, and T4 is higher than 120°C, perform charging stop protection and re-plug the charging gun;

[0035] When at least one of the temperatures T1, T2, T3, and T4 is higher than 95°C, perform current-reducing charging and re-set the charging current to 0.8 times the current charging current;

[0036] When at least one of the temperatures T1, T2, T3, and T4 is higher than 105°C, perform current-reducing charging and re-set the charging current to 0.5 times the current charging current;

[0037] When the temperatures T1, T2, T3, and T4 are all lower than 90°C, resume normal charging without derating.

[0038] According to a second aspect of the present invention, there is provided an automotive charging thermal management control system, including: a vehicle control system and a battery management system,

[0039] The vehicle control system is configured to obtain the maximum output current capacity of the charging pile when starting to charge;

[0040] The battery management system is configured to obtain the maximum output current capacity of the charging pile sent by the vehicle control system, determine the cooling level of the cooling system according to the maximum output current capacity, and send a cooling level request to the vehicle control system;

[0041] The vehicle control system is further configured to receive the cooling level request sent by the battery management system, obtain the current ambient temperature from the air conditioner controller, control the duty ratio of the water pump according to the cooling level and the current ambient temperature, and during the charging process, collect the coolant temperature and control the power of the air conditioner compressor according to the coolant temperature.

[0042] According to a third aspect of the present invention, there is provided an electronic device, including a memory and a processor, and the processor is configured to implement the steps of the automotive charging thermal management control method as described above when executing a computer management program stored in the memory.

[0043] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium, on which a computer management program is stored, and the computer management program is configured to implement the steps of the automotive charging thermal management control method as described above when executed by a processor.

[0044] An automotive charging thermal management control method, system, electronic device and storage medium provided by the present invention, for high-power fast charging, especially for large-current charging technologies exceeding 250A, such as 600A fast technology, before charging, by obtaining the maximum output current capacity of the charging pile, the corresponding cooling level is determined in advance, and according to the determined cooling level and the ambient temperature, the duty ratio of the water pump is further determined, so as to achieve pre-cooling. During the charging process, the power of the air conditioner compressor is controlled by the coolant temperature, which plays a good role in thermal protection for the fast charging process; on the other hand, the present invention also monitors the temperature of the fast charging connector of the battery pack to prevent the temperature at the connector from being too high or even catching fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a flowchart of an automotive charging thermal management control method provided by the present invention;

[0046] Figure 2 It is a schematic diagram of a charging system architecture provided by an embodiment of the present invention;

[0047] Figure 3 Schematic diagram of an automotive charging thermal management control system provided by an embodiment of the present invention;

[0048] Figure 4 Schematic diagram of the hardware structure of a possible electronic device provided by the present invention;

[0049] Figure 5 Schematic diagram of the hardware structure of a possible computer-readable storage medium provided by the present invention. Detailed implementation manners

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Additionally, the technical features in each embodiment or a single embodiment provided by the present invention can be combined with each other arbitrarily to form a feasible technical solution. Such combination is not restricted by the order of steps and / or the pattern of structural composition, but must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0051] Figure 1 Flowchart of an automotive charging thermal management control method provided by the present invention, as Figure 1 shown, the automotive charging thermal management control method mainly includes the following steps:

[0052] S1. When starting to charge, obtain the maximum output current capacity CML_Max_Output_Current of the charging pile.

[0053] It is understandable that the present invention can obtain the maximum output current CML_Max_Output_Current of the charging pile in various ways. For example, the vehicle control unit (VCU) can obtain the maximum output current capacity CML_Max_Output_Current of the charging pile through the fast charging CAN, and the battery management system (BMS) can obtain the maximum output current capacity CML_Max_Output_Current of the charging pile sent by the VCU through the vehicle CAN. Of course, the present invention is not limited to obtaining the maximum output current capacity CML_Max_Output_Current through the above methods. Those skilled in the art can also choose other methods, as long as the method can obtain the maximum output current capacity CML_Max_Output_Current of the charging pile, it is within the protection scope of the present invention.

[0054] S2. Determine the cooling level according to the maximum output current CML_Max_Output_Current.

[0055] It is understandable that when starting to charge in the present application, the corresponding cooling level is determined according to the obtained maximum output current CML_Max_Output_Current of the charging pile. Compared with the prior art where the coolant temperature is reduced when the coolant temperature rises during the charging process, the present invention can prevent the coolant temperature from being too high in advance and control the coolant temperature within an appropriate range. Therefore, it can be applied to the high-power fast charging process with a relatively fast temperature rise. In addition, the present invention does not limit the specific correspondence between the maximum output current CML_Max_Output_Current and the cooling level. Those skilled in the art can set the correspondence between the cooling level of the cooling system and the interval range of the maximum output current capacity of the charging pile according to actual use, and determine the cooling level of the cooling system corresponding to the maximum output current capacity of the charging pile according to the interval range in which the maximum output current capacity of the charging pile falls. However, as a preferred method, for the maximum output current of the charging pile of 250A - 600A commonly used in the prior art, the present invention adopts the following correspondence between the maximum output current CML_Max_Output_Current and the cooling level:

[0056] When the maximum output current CML_Max_Output_Current is less than 250A, determine the cooling level as Level1;

[0057] When the maximum output current CML_Max_Output_Current is between 250A and 400A, determine the cooling level as Level2;

[0058] When the maximum output current CML_Max_Output_Current is between 400 A and 600 A, the cooling level is determined to be Level3.

[0059] S3. Obtain the current ambient temperature, and control the duty ratio of the coolant water pump according to the cooling level and the current ambient temperature;

[0060] It can be understood that the ambient temperature also affects the cooling efficiency of the coolant. The lower the ambient temperature, the higher the cooling efficiency of the coolant. Therefore, the present invention also takes into account the influence of the ambient temperature on the coolant. At the same time, the flow rate of the coolant can be adjusted by adjusting the duty ratio of the coolant water pump. Therefore, the present invention jointly controls the duty ratio of the coolant water pump through the cooling level determined in step S2 and the obtained ambient temperature, so as to achieve the control of the coolant flow rate. Specifically, those skilled in the art can set the corresponding relationship between the duty ratio of the coolant water pump and the cooling level, and the corresponding relationship between the duty ratio of the coolant water pump and the range of the current ambient temperature according to actual use, and determine the duty ratio of the coolant water pump corresponding to the cooling level and the current ambient temperature according to the range of the cooling level and the current ambient temperature. However, as a preferred method, for the existing conventional coolant water pump, the present invention adopts the following corresponding relationship between the cooling level, the ambient temperature and the duty ratio of the coolant water pump:

[0061] When the cooling level is Level1 and the ambient temperature < 45°C, control the duty ratio of the water pump to be 80%;

[0062] When the cooling level is Level1 and the ambient temperature > 45°C, control the duty ratio of the water pump to be 100%;

[0063] When the cooling level is Level2 or Level3, control the duty ratio of the water pump to be 100%.

[0064] S4. During the charging process, collect the coolant temperature and control the power of the air-conditioning compressor according to the coolant temperature.

[0065] It can be understood that during the charging process, the present invention also real-time collects the temperature of the coolant, and controls the power of the air-conditioning compressor according to the real-time temperature of the coolant, so as to control the temperature of the coolant within an appropriate range, such as below 40°C. The present invention does not specifically limit the corresponding relationship between the coolant temperature and the power of the air-conditioning compressor. Those skilled in the art can set the corresponding relationship between the power of the air-conditioning compressor and the coolant temperature range according to actual use, and determine the power of the air-conditioning compressor corresponding to the coolant temperature according to the range of the coolant temperature. However, as a preferred method, for existing conventional coolants and air-conditioning compressors, the present invention adopts the following corresponding relationship between the coolant temperature and the power of the air-conditioning compressor:

[0066] When the coolant temperature is below 40°C, control the power of the air-conditioning compressor to be 0 kw;

[0067] When the coolant temperature is between 40°C and 50°C, control the power of the air-conditioning compressor to be 4 kw;

[0068] When the coolant temperature is greater than 50°C, control the power of the air-conditioning compressor to be 7 kw;

[0069] Among them, 7 kw is the maximum power of the air-conditioning compressor.

[0070] As a further preferred embodiment, since in the prior art, the fast charging system only detects the temperature of the high-voltage wire harness connection in the charging seat. However, during the actual charging process, the connection port from the high-voltage wire harness to the battery pack is also a region with a relatively high temperature, and there is also a risk of overheating and fire in this region. Especially for high-power fast charging, the risk of overheating and fire is further increased. Therefore, on the basis of the existing charging system architecture, the present invention further adds the temperature detection of the fast charging connector. Specifically, as Figure 2 shown, the present invention arranges temperature sensors PTC1 and PTC2 inside the fast charging connector on the battery pack, and the battery management system (BMS) respectively collects the temperatures T1 and T2 of the positive and negative poles of the high-voltage wire harness inside the fast charging connector on the battery pack. At the same time, temperature sensors PTC3 and PTC4 are also arranged at the fast charging seat end, and the battery management system (BMS) respectively collects the temperatures T3 and T4 of the positive and negative poles of the high-voltage wire harness at the fast charging seat end. The battery management system (BMS) communicates with the vehicle controller (VCU) through the vehicle CAN, and transmits the temperatures T1 and T2 of the positive and negative poles of the high-voltage wire harness inside the fast charging connector on the battery pack collected through the vehicle CAN to the vehicle controller (VCU). The vehicle controller (VCU) and the fast charging pile end communicate through the fast charging CAN, and collect the temperatures T3 and T4 of the positive and negative poles of the high-voltage wire harness at the fast charging seat end through the fast charging CAN.

[0071] Based on the above charging system architecture, in order to further control the risk of overheating and fire during charging, the vehicle charging thermal management control method of the present invention further includes the following steps:

[0072] S5. During the charging process, collect the temperature T1 of the positive electrode and the temperature T2 of the negative electrode of the high-voltage wire harness inside the fast charging connector on the battery pack, and the temperature T3 of the positive electrode and the temperature T4 of the negative electrode of the high-voltage wire harness at the fast charging seat end respectively, and adjust the charging current according to the collected temperatures T1, T2, T3, and T4.

[0073] It can be understood that based on Figure 2 the shown charging system architecture, the present invention obtains the temperatures T1, T2 of the positive and negative electrodes of the high-voltage wire harness inside the fast charging connector and the temperatures T3, T4 of the positive and negative electrodes of the high-voltage wire harness at the fast charging seat end through the vehicle controller (VCU) respectively, and the vehicle controller (VCU) further controls the charging current of the charging pile according to the temperatures T1, T2, T3, and T4. Among them, the temperatures T1, T2 of the positive and negative electrodes of the high-voltage wire harness inside the fast charging connector are collected by the battery management system (BMS) and transmitted to the vehicle controller (VCU) through the vehicle CAN. The temperatures T3, T4 of the positive and negative electrodes of the high-voltage wire harness at the fast charging seat end are transmitted to the vehicle controller (VCU) through the fast charging CAN. The above temperature collection method is only an embodiment of the present invention. The present invention does not limit the specific temperature collection method, and those skilled in the art can also collect and transmit the corresponding temperature values through other sensors and circuits. In addition, the present invention does not limit the specific adjustment method for adjusting the charging current according to the collected temperatures T1, T2, T3, T4. Those skilled in the art can make appropriate selections according to the temperature changes of the temperatures T1, T2, T3, T4 in actual use. However, as a preferred method, for the existing charging piles and charging currents, the present invention adopts the following adjustment method:

[0074] When any one of the temperatures T1, T2, T3, and T4 is higher than 120°C, stop charging protection is performed, and even if the temperature drops, charging will not automatically resume. It is necessary to re-plug the charging gun.

[0075] When at least one of the temperatures T1, T2, T3, and T4 is higher than 95°C, reduce the charging current and reset the charging current to 0.8 times the current charging current.

[0076] When at least one of the temperatures T1, T2, T3, and T4 is higher than 105°C, reduce the charging current and reset the charging current to 0.5 times the current charging current.

[0077] When the temperatures T1, T2, T3, T4 are all lower than 90°C, resume normal charging without derating.

[0078] It can be understood that the above adjustment method can be a continuous process. For example, when any one of T1, T2, T3, and T4 is higher than 105°C, such as 110°C, and when the initial charging current is I0, according to the above adjustment method, the current should be charged, and the charging current should be reset to 0.5 times the current charging current, that is, the charging current is set to 0.5I0. Then, continue to monitor the temperatures T1, T2, T3, and T4 of the temperature sensors PTC1, PTC2, PTC3, and PTC4. Since the charging current is reduced, the temperatures of T1, T2, T3, and T4 will decrease. When T1, T2, T3, and T4 are all lower than 105°C, and at least one of T1, T2, T3, and T4 is higher than 95°C, such as 100°C, then according to the above adjustment method, the charging current should be reset to 0.5 times the current charging current, that is, the charging current is set to 0.4I0. Then, continue to monitor the temperatures T1, T2, T3, and T4 of the temperature sensors PTC1, PTC2, PTC3, and PTC4. Since the charging current is reduced, the temperatures of T1, T2, T3, and T4 will further decrease. When T1, T2, T3, and T4 are all lower than 95°C, such as 90°C, then normal charging is resumed without derating, that is, the current of I0 is used for charging again. Of course, the above method is only an example of the present invention. In actual use, the temperatures T1, T2, T3, and T4 may not be higher than 105°C, for example, only 100°C. Then, the charging current should be set to half of the current charging current at this time. Then, when the temperatures T1, T2, T3, and T4 drop below 95°C, the original charging current is used for charging.

[0079] Based on the defects in the background technology, an embodiment of the present invention proposes an automotive charging thermal management control method. Compared with the prior art, when starting to charge, the present invention identifies the output current capacity of the charging pile, determines the corresponding cooling level, and comprehensively determines the duty ratio of the coolant water pump according to the ambient temperature, so as to achieve pre-cooling for high-power fast charging. During the charging process, the present invention further adjusts the compressor power in real time according to the coolant temperature to stabilize the coolant temperature. The present invention also aims at the defect that the temperature of the connection port from the high-voltage wire harness to the battery pack is not monitored during the existing high-power fast charging process, and specifically sets a temperature sensor inside the fast charging connector on the battery pack to monitor the temperature change at this connection port in real time, thereby further reducing the problem of overheating and fire during high-power fast charging.

[0080] Figure 3 A schematic diagram of an automotive charging thermal management control system provided by the present invention, as Figure 3 shown, an automotive charging thermal management control system of the present invention mainly includes: a vehicle control unit VCU and a battery management system BMS, where:

[0081] The vehicle control unit (VCU) is configured to obtain the maximum output current capacity (CML_Max_Output_Current) of the charging pile when starting charging.

[0082] The battery management system (BMS) is configured to obtain the maximum output current capacity (CML_Max_Output_Current) of the charging pile sent by the vehicle control unit (VCU), determine the cooling level according to the maximum output current capacity (CML_Max_Output_Current), and send a cooling level request to the vehicle control unit (VCU).

[0083] The vehicle control unit (VCU) is further configured to receive the cooling level request sent by the battery management system (BMS), obtain the ambient temperature from the air conditioner controller, control the duty cycle of the water pump according to the cooling level and the ambient temperature, and during the charging process, collect the coolant temperature and control the power of the air conditioner compressor according to the coolant temperature.

[0084] As a preferred embodiment, the vehicle control unit (VCU) of the present invention is further configured to, during the charging process, collect the temperatures T1 and T2 of the positive and negative poles of the high-voltage wire harness inside the fast charging connector on the battery pack, and the temperatures T3 and T4 of the positive and negative poles of the high-voltage wire harness at the fast charging socket end, and adjust the charging current according to the collected temperatures T1, T2, T3, and T4.

[0085] It can be understood that an automotive charging thermal management control system provided by the present invention corresponds to the automotive charging thermal management control method provided in the foregoing embodiments. The relevant technical features of an automotive charging thermal management control system can refer to the relevant technical features of an automotive charging thermal management control method, which will not be elaborated herein.

[0086] Please refer to Figure 4 , Figure 4 which is a schematic diagram of an embodiment of an electronic device provided by an embodiment of the present invention. As Figure 4 shown, an embodiment of the present invention provides an electronic device, including a memory 410, a processor 420, and a computer program 411 stored in the memory 410 and executable on the processor 420. When the processor 420 executes the computer program 411, the following steps are implemented:

[0087] S1. When starting charging, obtain the maximum output current capacity (CML_Max_Output_Current) of the charging pile;

[0088] S2. Determine the cooling level according to the maximum output current capacity (CML_Max_Output_Current);

[0089] S3. Obtain the ambient temperature and control the duty ratio of the coolant water pump according to the cooling level and the ambient temperature;

[0090] S4. During the charging process, collect the coolant temperature and control the power of the air-conditioning compressor according to the coolant temperature.

[0091] As a preferred embodiment, when the computer program 311 is executed, the following steps are further implemented:

[0092] S5. During the charging process, collect the positive temperature T1 and negative temperature T2 of the high-voltage wire harness inside the fast-charging connector on the battery pack, and the positive temperature T3 and negative temperature T4 of the high-voltage wire harness at the fast-charging socket end, and adjust the charging current according to the collected temperatures T1, T2, T3, and T4.

[0093] Please refer to Figure 5 , Figure 5 which is a schematic diagram of an embodiment of a computer-readable storage medium provided by the present invention. As Figure 5 shown, this embodiment provides a computer-readable storage medium 500, on which a computer program 511 is stored. When the computer program 511 is executed by a processor, the following steps are implemented:

[0094] S1. At the start of charging, obtain the maximum output current capacity CML_Max_Output_Current of the charging pile;

[0095] S2. Determine the cooling level according to the maximum output current capacity CML_Max_Output_Current;

[0096] S3. Obtain the ambient temperature and control the duty ratio of the coolant water pump according to the cooling level and the ambient temperature;

[0097] S4. During the charging process, collect the coolant temperature and control the power of the air-conditioning compressor according to the coolant temperature.

[0098] As a preferred embodiment, when the computer program 411 is executed, the following steps are further implemented:

[0099] S5. During the charging process, collect the positive temperature T1 and negative temperature T2 of the high-voltage wire harness inside the fast-charging connector on the battery pack, and the positive temperature T3 and negative temperature T4 of the high-voltage wire harness at the fast-charging socket end, and adjust the charging current according to the collected temperatures T1, T2, T3, and T4.

[0100] It should be noted that in the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] Those skilled in the art will understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0102] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0103] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that realizes the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0105] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0106] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A method for controlling automotive charging thermal management, characterized in that, Including the following steps: S1. When starting to charge, obtain the maximum output current capacity of the charging pile; S2. Determine the cooling level of the cooling system according to the maximum output current capacity of the charging pile; S3. Obtain the current ambient temperature, and control the duty ratio of the coolant water pump according to the cooling level and the current ambient temperature; S4. During the charging process, collect the coolant temperature, and control the power of the air-conditioning compressor according to the coolant temperature; In step S2, determining the cooling level of the cooling system according to the maximum output current capacity of the charging pile includes: Setting the corresponding relationship between the cooling level of the cooling system and the range of the maximum output current capacity of the charging pile; Determining the cooling level of the cooling system corresponding to the maximum output current capacity of the charging pile according to the range in which the maximum output current capacity of the charging pile falls; The determining the cooling level of the cooling system corresponding to the maximum output current capacity of the charging pile according to the range in which the maximum output current capacity of the charging pile falls includes: When the maximum output current capacity of the charging pile is less than 250A, determining that the cooling level of the cooling system is Level1; When the maximum output current capacity of the charging pile is between 250A and 400A, determining that the cooling level of the cooling system is Level2; When the maximum output current capacity of the charging pile is between 400A and 600A, determining that the cooling level of the cooling system is Level3.

2. The automotive charging thermal management control method according to claim 1, wherein In step S3, controlling the duty ratio of the coolant water pump according to the cooling level and the current ambient temperature includes: Setting the corresponding relationship between the cooling level and the range of the current ambient temperature and the duty ratio of the coolant water pump; Determining the duty ratio of the coolant water pump corresponding to the cooling level and the current ambient temperature according to the range in which the cooling level and the current ambient temperature fall.

3. The automotive charging thermal management control method according to claim 2, characterized in that, The determining the duty ratio of the coolant water pump corresponding to the cooling level and the current ambient temperature according to the range in which the cooling level and the current ambient temperature fall includes: When the cooling level of the cooling system is Level1 and the current ambient temperature < 45°C, controlling the duty ratio of the coolant water pump to be 80%; When the cooling level of the cooling system is Level1 and the current ambient temperature > 45°C, controlling the duty ratio of the coolant water pump to be 100%; When the cooling level of the cooling system is Level2 or Level3, controlling the duty ratio of the coolant water pump to be 100%.

4. The automotive charging thermal management control method according to claim 1, wherein In step S4, controlling the power of the air-conditioning compressor according to the coolant temperature includes: Setting the corresponding relationship between the power of the air-conditioning compressor and the range of the coolant temperature; Determining the power of the air-conditioning compressor corresponding to the coolant temperature according to the range in which the coolant temperature falls.

5. The automotive charging thermal management control method according to claim 4, wherein The determining the power of the air-conditioning compressor corresponding to the coolant temperature according to the range in which the coolant temperature falls includes: When the coolant temperature is lower than 40°C, controlling the power of the air-conditioning compressor to be 0kw; When the coolant temperature is between 40°C and 50°C, controlling the power of the compressor to be 4kw; When the coolant temperature is greater than 50 °C, control the compressor power to 7 kW.

6. The automotive charging thermal management control method according to claim 1, wherein After step S4, it further includes: S5. During the charging process, collect the positive temperature T1 and negative temperature T2 of the high-voltage wire harness inside the fast charging connector on the battery pack, as well as the positive temperature T3 and negative temperature T4 of the high-voltage wire harness at the fast charging socket end, and adjust the charging current according to the collected temperatures T1, T2, T3, and T4.

7. A method for controlling automotive charging thermal management according to claim 6, characterized in that, The adjusting the charging current according to the collected temperatures T1, T2, T3, and T4 specifically includes: When any one of the temperatures T1, T2, T3, and T4 is higher than 120 °C, perform charging stop protection and re-plug the charging gun; When at least one of the temperatures T1, T2, T3, and T4 is higher than 95 °C, perform current reduction charging and re-set the charging current at 0.8 times the current charging current; When at least one of the temperatures T1, T2, T3, and T4 is higher than 105 °C, perform current reduction charging and re-set the charging current at 0.5 times the current charging current; When the temperatures T1, T2, T3, and T4 are all lower than 90 °C, resume normal charging without derating.

8. An automotive charging thermal management control system, characterized in that, It includes: The vehicle control system and the battery management system; The vehicle control system is used to obtain the maximum output current capacity of the charging pile when starting to charge; It is also used to receive the cooling level request sent by the battery management system, obtain the current ambient temperature from the air conditioner controller, and control the duty ratio of the water pump according to the cooling level and the current ambient temperature; And during the charging process, collect the coolant temperature and control the power of the air conditioner compressor according to the coolant temperature; The battery management system is used to obtain the maximum output current capacity of the charging pile sent by the vehicle control system, determine the cooling level of the cooling system according to the maximum output current capacity, and send a cooling level request to the vehicle control system; Determining the cooling level of the cooling system according to the maximum output current capacity of the charging pile includes: Set the corresponding relationship between the cooling level of the cooling system and the interval range of the maximum output current capacity of the charging pile; According to the interval range in which the maximum output current capacity of the charging pile falls, determine the cooling level of the cooling system corresponding to the maximum output current capacity of the charging pile; the determining the cooling level of the cooling system corresponding to the maximum output current capacity of the charging pile according to the interval range in which the maximum output current capacity of the charging pile falls includes: When the maximum output current capacity of the charging pile is less than 250 A, determine that the cooling level of the cooling system is Level1; When the maximum output current capacity of the charging pile is between 250 A and 400 A, determine that the cooling level of the cooling system is Level2; When the maximum output current capacity of the charging pile is between 400 A and 600 A, determine that the cooling level of the cooling system is Level3.

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