Thermal control method, device and equipment of vehicle thermal management system and storage medium

Abstract

The invention relates to a thermal control method, device and equipment of a vehicle thermal management system and a storage medium, and the method comprises the steps that the state of a temperature sensor of target equipment is recognized, and the target equipment is power supply equipment or power consumption equipment; if it is determined that the temperature sensor fails based on the state of the temperature sensor, vehicle state information is obtained; according to the vehicle state information, the alternative temperature of the temperature sensor in the target equipment is determined; and performing thermal control on the target equipment based on the replacement temperature. According to the invention, fault processing of the vehicle thermal management system can be realized based on state identification, and robustness and stability of the thermal management system and vehicle control are improved.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and particularly to a thermal control method, device, equipment, and storage medium for a vehicle thermal management system. Background Art

[0002] At present, the field of new energy vehicles is developing rapidly. The thermal management of the new energy vehicle battery pack and the electric drive system affects the main thermal management functions of the whole vehicle. The thermal management of the battery pack greatly affects the performance, reliability, and lifespan of the battery cells and the power performance of the whole vehicle. The thermal management of the electric drive system affects the performance, reliability, and lifespan of components such as motors, generators, OBCs (on-board chargers), and DCDCs (DC converters), as well as the power performance of the whole vehicle.

[0003] Currently, for the thermal management of the battery pack and the electric drive system, the common technology relies on the temperature of the battery pack water inlet and the water temperature of the electric drive circuit to judge and control. The temperature of the battery pack water inlet and the water temperature of the electric drive circuit are collected by corresponding sensors. However, the stability of this thermal management method mainly depends on the stability of the temperature sensors. When the temperature sensors fail, it will lead to abnormal calculated temperatures, and the thermal management system cannot operate normally, reducing the robustness and stability of the thermal management system. Therefore, there is an urgent need for a thermal control method for a vehicle thermal management system to solve the above problems. Summary of the Invention

[0004] Based on this, the present application provides a thermal control method, device, equipment, and storage medium for a vehicle thermal management system to solve the problems existing in the prior art.

[0005] In a first aspect, a thermal control method for a vehicle thermal management system is provided. The method includes:

[0006] Identifying the status of the temperature sensor of the target device, where the target device is a power supply device or a power-consuming device;

[0007] If it is determined that the temperature sensor fails based on the status of the temperature sensor, obtaining vehicle status information;

[0008] Determining an alternative temperature of the temperature sensor in the target device according to the vehicle status information;

[0009] Performing thermal control on the target device based on the alternative temperature.

[0010] According to an implementable manner in an embodiment of the present application, when the target device is a power supply device, the power supply device includes a battery pack device, and the temperature sensor of the power supply device includes the water inlet temperature sensor of the battery pack device;

[0011] Identifying the state of the temperature sensor of the target device includes: identifying the state of the water inlet temperature sensor of the battery pack device;

[0012] If it is determined that the temperature sensor fails based on the state of the temperature sensor, obtaining vehicle state information includes: if it is determined that the water inlet temperature sensor of the battery pack device fails based on the state of the water inlet temperature sensor of the battery pack device, obtaining the vehicle state information, where the vehicle state information includes one or more of battery temperature information, battery charge state information, and the state information of the water outlet temperature sensor of the battery pack device;

[0013] Determining the alternative temperature of the temperature sensor in the target device according to the vehicle state information includes: determining the alternative temperature of the water inlet temperature sensor of the battery pack device based on one or more of the battery temperature information, battery charge state information, and the state information of the water outlet temperature sensor of the battery pack device.

[0014] According to an achievable manner in the embodiments of the present application, determining the alternative temperature of the water inlet temperature sensor of the battery pack device based on one or more of the battery temperature information, battery charge state information, and the state information of the water outlet temperature sensor of the battery pack device includes:

[0015] Identifying whether the water outlet temperature sensor of the battery pack device fails according to the state information of the water outlet temperature sensor of the battery pack device;

[0016] If it is identified that the water outlet temperature sensor of the battery pack device does not fail, determining the temperature of the water outlet temperature sensor of the battery pack device as the alternative temperature of the water inlet temperature sensor of the battery pack device.

[0017] According to an achievable manner in the embodiments of the present application, the method further includes:

[0018] If it is identified that the water outlet temperature sensor of the battery pack device fails, determining the alternative temperature of the water inlet temperature sensor of the battery pack device based on the battery temperature information and battery charge state information.

[0019] According to an achievable manner in the embodiments of the present application, determining the alternative temperature of the water inlet temperature sensor of the battery pack device based on the battery temperature information and battery charge state information includes:

[0020] Obtaining the target inlet water temperature of the water inlet of the battery pack device;

[0021] If it is determined based on the battery temperature information that the battery temperature is higher than the maximum value of the rated temperature range, and the target inlet water temperature is the first temperature, then the alternative temperature is determined according to the first temperature and the battery charging status information, the first temperature is less than the maximum value, and the alternative temperature is greater than or equal to the first temperature;

[0022] If it is determined based on the battery temperature information that the battery temperature is lower than the minimum value of the rated temperature range and the target inlet water temperature is the second temperature, then the second temperature is used as the replacement temperature, the second temperature is greater than the minimum value and the second temperature is greater than the first temperature;

[0023] If it is determined based on the battery temperature information that the battery temperature is within the rated temperature range and the target inlet water temperature is the third temperature, then the third temperature is used as the replacement temperature, and the third temperature is within the rated temperature range.

[0024] According to an implementable manner in the embodiments of the present application, determining the alternative temperature according to the first temperature and the battery charging status information includes:

[0025] If it is determined based on the battery charging status information that the battery is in a charging state, then the alternative temperature is greater than the first temperature;

[0026] If it is determined based on the battery charging status information that the battery is not in a charging state, then the alternative temperature is equal to the first temperature.

[0027] According to an implementable manner in the embodiments of the present application, when the target device is a power-consuming device, the power-consuming device includes an electric drive device, and the temperature sensor of the power-consuming device includes a water temperature sensor in the electric drive device;

[0028] Identifying the state of the temperature sensor of the target device includes: identifying the state of the water temperature sensor in the electric drive device;

[0029] If it is determined based on the state of the temperature sensor that the temperature sensor fails, then obtaining vehicle state information includes: if it is determined based on the state of the water temperature sensor in the electric drive device that the water temperature sensor in the electric drive device fails, then obtaining vehicle state information, and the vehicle state information includes the state information of other sensors in the electric drive device that are not the water temperature sensor;

[0030] Determining the alternative temperature of the failed temperature sensor in the target device according to the vehicle state information includes: determining the alternative temperature of the water temperature sensor in the electric drive device based on the state information of other sensors in the electric drive device that are not the water temperature sensor.

[0031] According to an implementable manner in the embodiments of the present application, determining an alternative temperature of the water temperature sensor in the electric drive device based on the status information of other sensors in the electric drive device that are not the water temperature sensor includes:

[0032] Obtaining the temperatures of other sensors in the electric drive device that are not the water temperature sensor;

[0033] Determining the temperatures of other sensors in the electric drive device that are not the water temperature sensor as the alternative temperature of the water temperature sensor in the electric drive device.

[0034] In a second aspect, a thermal control device for a vehicle thermal management system is provided. The device includes:

[0035] An identification unit: configured to identify the status of the temperature sensor of the target device, where the target device is a power supply device or a power-consuming device;

[0036] An acquisition unit: configured to obtain vehicle status information if it is determined based on the status of the temperature sensor that the temperature sensor fails;

[0037] A replacement unit: configured to determine an alternative temperature of the temperature sensor in the target device according to the vehicle status information;

[0038] An execution unit: configured to perform thermal control on the target device based on the alternative temperature.

[0039] In a third aspect, a computer device is provided, including:

[0040] At least one processor; and

[0041] A memory communicatively connected to the at least one processor; wherein,

[0042] The memory stores computer instructions executable by the at least one processor, and the computer instructions are executed by the at least one processor so that the at least one processor can execute the method involved in the first aspect above.

[0043] According to the technical content provided in the embodiments of the present application, the present application determines an alternative temperature of a failed temperature sensor by identifying whether the temperature sensor in a power supply device or a power-consuming device fails and according to vehicle status information, and then performs thermal management on the power supply device or the power-consuming device based on the alternative temperature, so that it is possible to keep the thermal management system running normally after the sensor fails, realize fault handling of the vehicle thermal management system based on status identification, and improve the robustness and stability of the thermal management system and the vehicle control. Description of the Drawings

[0044] Figure 1Schematic flow chart of the thermal control method for a vehicle thermal management system in an embodiment;

[0045] Figure 2 Another schematic flow chart of the thermal control method for a vehicle thermal management system in an embodiment;

[0046] Figure 3 Schematic diagram of the battery pack device of the thermal control method for a vehicle thermal management system in an embodiment;

[0047] Figure 4 Another schematic flow chart of the thermal control method for a vehicle thermal management system in an embodiment;

[0048] Figure 5 Schematic diagram of the electric drive device of the thermal control method for a vehicle thermal management system in an embodiment;

[0049] Figure 6 Another schematic flow chart of the thermal control method for a vehicle thermal management system in an embodiment;

[0050] Figure 7 Structure block diagram of the thermal control device for a vehicle thermal management system in an embodiment;

[0051] Figure 8 Schematic structural diagram of a computer device in an embodiment. Detailed implementation manners

[0052] The following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] Figure 1 Flow chart of a thermal control method for a vehicle thermal management system provided by an embodiment of the present application, as Figure 1 shown, the method may include the following steps:

[0054] Step 101: Identify the status of the temperature sensor of the target device, where the target device is a power supply device or a power-consuming device.

[0055] Specifically, the thermal management of the power supply equipment and power-consuming equipment in new energy vehicles affects the main thermal management functions of the whole vehicle. The power supply equipment in new energy vehicles includes battery pack equipment. The thermal management of the battery pack greatly affects the performance, reliability, and lifespan of the battery cells and the power performance of the whole vehicle. The power-consuming equipment in new energy vehicles includes equipment such as the electric drive system. The thermal management of the electric drive system affects the performance, reliability, and lifespan of components such as motors and generators, as well as the power performance of the whole vehicle. Currently, for the thermal management of the power supply equipment and power-consuming equipment in new energy vehicles, it is generally judged and controlled by monitoring the status of temperature sensors in the power supply equipment and power-consuming equipment. For example, for battery pack equipment, it is judged based on the status of the temperature sensors at the water inlet and outlet of the battery pack. For the electric drive system, it is judged and controlled based on the status of the water temperature sensor in the electric drive circuit. However, currently, the common method of collecting the temperature by the temperature sensor in the power supply equipment or power-consuming equipment and performing temperature control for the thermal management of the power supply equipment or power-consuming equipment has problems of poor robustness and weak stability in the control of the thermal management system. For example, when the temperature sensor at the water inlet of the battery pack fails, it will cause the abnormal temperature at the water inlet of the battery pack, and the heating or cooling function of the battery pack will fail, resulting in limited battery power, and further affecting the power performance, comfort, and even safety of the whole vehicle. When the water temperature sensor in the electric drive circuit fails, it will cause the abnormal water temperature in the electric drive circuit, the cooling of the electric drive system will be affected, and the control of devices such as fans and water pumps will be abnormal, causing performance problems such as noise and vibration, as well as power performance problems of the whole vehicle. Therefore, it is necessary to collect and identify the status of the temperature sensors in the power supply equipment or power-consuming equipment in real time, timely detect the faults in the thermal management system, and further execute the fault handling method.

[0056] Step 102: If it is determined that the temperature sensor fails based on the status of the temperature sensor, obtain the vehicle status information.

[0057] Specifically, it is determined that the temperature sensor fails based on the status of the temperature sensor. For example, a resistive sensor determines the status of the sensor by monitoring the voltage value in its voltage division circuit. If the voltage value exceeds the rated range, it is determined that the temperature sensor fails. If it is determined that the temperature sensor in the power supply equipment or power-consuming equipment is in a failed state, there is a fault in the thermal management system, and it is necessary to further obtain the vehicle status information. Among them, the vehicle status information such as the status of other sensors in the system, battery temperature, gear position, charging status, component temperature status, etc. After determining that the temperature sensor fails, obtain the vehicle status information to perform corresponding fault handling.

[0058] Step 103: According to the vehicle status information, determine the alternative temperature of the temperature sensor in the target equipment.

[0059] Specifically, as Figure 2As shown in the figure, the thermal management system monitors the temperature of the power supply device or the power-consuming device in real time by obtaining the temperature of the temperature sensor in the power supply device or the power-consuming device, further calculates the water temperature of the water supply device, and sends the indicated water temperature to the water supply device. The water supply device controls the water temperature of the water entering the power supply device or the power-consuming device according to the indicated water temperature, so as to realize thermal control such as heating or cooling of the power supply device or the power-consuming device. If the temperature sensor in the power supply device or the power-consuming device fails, it will cause an error in the calculation of the indicated water temperature by the thermal management system, which will further affect the normal operation of the thermal management system and may even cause damage to the device. Therefore, it is necessary to determine the alternative temperature of the failed temperature sensor in the power supply device or the power-consuming device according to the vehicle status information, so as to ensure the normal operation of the thermal management system.

[0060] Step 104: Perform thermal control on the target device based on the alternative temperature.

[0061] Specifically, as Figure 2 shown in the figure, the thermal management system replaces the temperature of the failed temperature sensor it obtains with the alternative temperature, further calculates the indicated water temperature of the water supply device, and the water supply device controls the water temperature of the water entering the power supply device or the power-consuming device according to the indicated water temperature, so as to realize thermal control such as heating or cooling of the power supply device or the power-consuming device.

[0062] It can be seen that in the embodiment of the present application, by identifying whether the temperature sensor in the power supply device or the power-consuming device fails and according to the vehicle status information, the alternative temperature of the failed temperature sensor is determined, and then the power supply device or the power-consuming device is thermally managed based on the alternative temperature, so that the normal operation of the thermal management system can be maintained after the sensor fails, and the fault handling of the vehicle thermal management system is realized based on status recognition, improving the robustness and stability of the thermal management system and the vehicle control.

[0063] When the target device is a power-consuming device, the power-consuming device includes an electric drive device, and the temperature sensor of the power-consuming device includes a water temperature sensor in the electric drive device; identifying the status of the temperature sensor of the target device includes: identifying the status of the water temperature sensor in the electric drive device; if it is determined that the temperature sensor fails based on the status of the temperature sensor, then obtaining the vehicle status information, including: if it is determined that the water temperature sensor in the electric drive device fails based on the status of the water temperature sensor in the electric drive device, then obtaining the vehicle status information, and the vehicle status information includes the status information of other sensors in the electric drive device that are not water temperature sensors; according to the vehicle status information, determining the alternative temperature of the failed temperature sensor in the target device includes: based on the status information of other sensors in the electric drive device that are not water temperature sensors, determining the alternative temperature of the water temperature sensor in the electric drive device.

[0064] Specifically, as Figure 5 shown in the figure, Figure 5It is a schematic diagram of an electric drive circuit. The electric drive circuit of the electric drive device includes components such as a DCDC (DC converter), a water pump, a low-temperature radiator, a fan, and a motor, and also includes a water temperature sensor. When the water temperature sensor in the electric drive circuit fails, it will cause the cooling function of the electric drive system to be affected, and the control of devices such as the fan and the water pump will be abnormal, resulting in problems such as noise and vibration performance and vehicle power performance. Therefore, it is necessary to identify the state of the water temperature sensor in the electric drive device. When the water temperature sensor fails, corresponding fault handling should be carried out in a timely manner according to the vehicle state information. Based on this embodiment, the method performs the following steps: Step 2101: Identify the state of the water temperature sensor in the electric drive device; Step 2102: If it is determined that the water temperature sensor in the electric drive device fails based on the state of the water temperature sensor in the electric drive device, obtain the vehicle state information, where the vehicle state information includes the state information of other sensors in the electric drive device that are not water temperature sensors; Step 2103: Determine the alternative temperature of the water temperature sensor in the electric drive device based on the state information of other sensors in the electric drive device that are not water temperature sensors; Step 2104: Perform thermal control on the target device based on the alternative temperature.

[0065] In an embodiment of the present application, determining the alternative temperature of the water temperature sensor in the electric drive device based on the state information of other sensors in the electric drive device that are not water temperature sensors includes: obtaining the temperatures of other sensors in the electric drive device that are not water temperature sensors; determining the temperatures of other sensors in the electric drive device that are not water temperature sensors as the alternative temperature of the water temperature sensor in the electric drive device.

[0066] Specifically, as Figure 6 shown, when the water temperature sensor in the electric drive circuit fails, the coolant temperature in the electric drive circuit is abnormal. At this time, the temperature value of the temperature sensor in other devices of the electric drive device can be considered as the alternative temperature of the water temperature sensor. For example, the DCDC (DC converter) is arranged in series in this circuit. Although its temperature deviates from the coolant temperature, it can characterize the coolant temperature to a certain extent. At this time, replace the water temperature in the electric drive circuit with the temperature of the temperature sensor in the DCDC to ensure the normal operation of the thermal management control system of the electric drive circuit.

[0067] The embodiment of the present application can identify whether the temperature sensor in the power supply device or the power-consuming device fails and determine the alternative temperature of the failed temperature sensor according to the vehicle state information, and then perform thermal management on the power supply device or the power-consuming device based on the alternative temperature, so as to keep the thermal management system running normally after the sensor fails, realize the fault handling of the vehicle thermal management system based on state recognition, and improve the robustness and stability of the thermal management system and vehicle control.

[0068] In an embodiment of the present application, when the target device is a power supply device, the power supply device includes a battery pack device, and the temperature sensor of the power supply device includes the water inlet temperature sensor of the battery pack device; identifying the state of the temperature sensor of the target device includes: identifying the state of the water inlet temperature sensor of the battery pack device; if it is determined that the temperature sensor fails based on the state of the temperature sensor, then obtain vehicle state information, including: if it is determined that the water inlet temperature sensor of the battery pack device fails based on the state of the water inlet temperature sensor of the battery pack device, then obtain vehicle state information, and the vehicle state information includes one or more of battery temperature information, battery charge state information, and the state information of the water outlet temperature sensor of the battery pack device; according to the vehicle state information, determine the alternative temperature of the temperature sensor in the target device, including: based on one or more of battery temperature information, battery charge state information, and the state information of the water outlet temperature sensor of the battery pack device, determine the alternative temperature of the water inlet temperature sensor of the battery pack device.

[0069] Specifically, as Figure 3 shown, Figure 3 is a schematic diagram of the battery pack circuit. The water pump is used as a water supply device to adjust the water temperature of the battery pack circuit, and there is a temperature sensor at each of the water inlet and outlet of the battery pack to detect the water temperature. When the battery pack has a heating or cooling requirement, the water pump is controlled by the thermal management system to reach the target temperature at the water inlet of the battery pack for heating or cooling the battery pack. When the water inlet temperature sensor of the battery pack fails, it will cause the water inlet temperature of the battery pack to be abnormal, and the heating or cooling function of the battery pack will fail, resulting in limited battery power. Therefore, when the target device is a power supply device, the power supply device includes a battery pack device, and the temperature sensor of the power supply device is the water inlet temperature sensor of the battery pack device. When the target device is a power supply device, that is, the battery pack device, the method performs the following steps: Step 1101 Identify the state of the water inlet temperature sensor of the battery pack device; Step 1102 If it is determined that the water inlet temperature sensor of the battery pack device fails based on the state of the water inlet temperature sensor of the battery pack device, then obtain vehicle state information, and the vehicle state information includes one or more of battery temperature information, battery charge state information, and the state information of the water outlet temperature sensor of the battery pack device; Step 1103 Based on one or more of battery temperature information, battery charge state information, and the state information of the water outlet temperature sensor of the battery pack device, determine the alternative temperature of the water inlet temperature sensor of the battery pack device; Step 1104 Based on the alternative temperature, perform thermal control on the target device.

[0070] In one embodiment of the present application, determining the alternative temperature of the inlet water temperature sensor of the battery pack device based on one or more of the battery temperature information, battery charging status information, and the status information of the outlet water temperature sensor of the battery pack device in step 1103 includes: identifying whether the outlet water temperature sensor of the battery pack device fails according to the status information of the outlet water temperature sensor of the battery pack device; if it is identified that the outlet water temperature sensor of the battery pack device does not fail, determining the temperature of the outlet water temperature sensor of the battery pack device as the alternative temperature of the inlet water temperature sensor of the battery pack device.

[0071] Specifically, as Figure 4 shown, when the inlet water temperature sensor of the battery pack fails but the outlet water temperature sensor of the battery pack device does not fail, the temperature value Tin obtained by the thermal management system from the inlet water temperature sensor of the battery pack is abnormal, but the temperature value Tout obtained from the outlet water temperature sensor of the battery pack device is normal. At this time, since under normal circumstances, the temperature of the inlet water of the battery pack and the temperature of the outlet water of the battery pack only differ by 2-3 degrees Celsius, that is, the temperature difference between Tin and Tout is not significant when they are not failed. Therefore, identify whether the outlet water temperature sensor of the battery pack device fails according to the status information of the outlet water temperature sensor of the battery pack device; if it is identified that the outlet water temperature sensor of the battery pack device does not fail, obtain the temperature value of the outlet water temperature sensor of the battery pack and replace the temperature of the inlet water temperature sensor of the battery pack with the temperature value of the outlet water temperature sensor of the battery pack, so that the thermal management system can normally calculate the indicated water temperature, continue to meet the normal control of the battery thermal management system, and improve the stability of the thermal management system.

[0072] In one embodiment of the present application, after the step of identifying whether the outlet water temperature sensor of the battery pack device fails according to the status information of the outlet water temperature sensor of the battery pack device, it further includes: if it is identified that the outlet water temperature sensor of the battery pack device fails, determining the alternative temperature of the inlet water temperature sensor of the battery pack device based on the battery temperature information and battery charging status information.

[0073] Specifically, as Figure 4 shown, when both the inlet water temperature sensor of the battery pack and the outlet water temperature sensor of the battery pack device fail, the obtained inlet water temperature and outlet water temperature are both abnormal. At this time, it is necessary to comprehensively judge according to the vehicle status and replace the inlet water temperature of the battery pack, that is, determine the alternative temperature of the inlet water temperature sensor of the battery pack based on the battery temperature information and battery charging status information, so as to ensure the normal control of the battery thermal management system.

[0074] In an embodiment of the present application, determining the alternative temperature of the water inlet temperature sensor of the battery pack device based on the battery temperature information and the battery charging state information includes: obtaining the target inlet water temperature of the battery pack device; if it is determined based on the battery temperature information that the battery temperature is higher than the maximum value of the rated temperature range and the target inlet water temperature is the first temperature, then determining the alternative temperature according to the first temperature and the battery charging state information, the first temperature is less than the maximum value, and the alternative temperature is greater than or equal to the first temperature; if it is determined based on the battery temperature information that the battery temperature is lower than the minimum value of the rated temperature range and the target inlet water temperature is the second temperature, then using the second temperature as the replacement temperature, the second temperature is greater than the minimum value and the second temperature is greater than the first temperature; if it is determined based on the battery temperature information that the battery temperature is within the rated temperature range and the target inlet water temperature is the third temperature, then using the third temperature as the replacement temperature, the third temperature is within the rated temperature range.

[0075] Specifically, as Figure 4 shown, if the battery temperature is higher than the maximum value of the rated temperature range, for example, the battery rated temperature range is 15°C to 40°C, when the battery pack temperature is 41°C, it is higher than the maximum value of the rated temperature range. At this time, the battery temperature is relatively high and the battery has a cooling requirement. Therefore, the target inlet water temperature T-Target of the battery pack is the lower first temperature, so as to meet the cooling requirement of the battery. This first temperature is less than the maximum value of the battery rated temperature range. For example, the first temperature is 25°C. At this time, the alternative temperature of the water inlet temperature sensor of the battery pack is further determined according to the first temperature in combination with the battery charging state information. Specifically, the alternative temperature is greater than or equal to this first temperature. When the alternative temperature is greater than the first temperature, the thermal management system obtains that the temperature value of the water inlet temperature sensor of the battery pack (i.e., the alternative temperature) is greater than the target inlet water temperature value (i.e., the first temperature), so that the cooling function of the thermal management system operates quickly to rapidly cool the battery pack; when the alternative temperature is equal to the first temperature, the thermal management system obtains that the temperature value of the water inlet temperature sensor of the battery pack (i.e., the alternative temperature) is equal to the target inlet water temperature value (i.e., the first temperature), so that the cooling function of the thermal management system operates normally to maintain the lowest operating state of the cooling system and achieve the cooling of the battery.

[0076] If the battery temperature is lower than the minimum value of the rated temperature range, at this time the battery temperature is relatively low and the battery has a heating requirement. The target inlet water temperature T-Target of the battery is the higher second temperature. This second temperature is greater than the minimum value of the battery rated temperature range and the second temperature is greater than the above-mentioned first temperature, so as to meet the heating requirement of the battery. For example, the second temperature is 40°C. Thus, the thermal management system is triggered to heat the battery pack device, making the heating system operate normally.

[0077] If the battery temperature is within the rated temperature range, such as the battery temperature is between 15°C and 40°C, at this time, the battery pack device has basically no cooling or heating requirements, and the target inlet water temperature T-Target of the battery is the third temperature, and the third temperature is within the rated temperature range of the battery. For example, the third temperature value T4 is equal to 25°C, and the third temperature is used as the replacement temperature, so as to trigger the thermal management system to maintain the battery temperature within the rated temperature range.

[0078] In an embodiment of the present application, determining the alternative temperature according to the first temperature and the battery charging state information includes: if it is determined based on the battery charging state information that the battery is in the charging state, the alternative temperature is greater than the first temperature; if it is determined based on the battery charging state information that the battery is not in the charging state, the alternative temperature is equal to the first temperature.

[0079] Specifically, as Figure 4 shown, when the battery temperature is relatively high, the battery has a cooling requirement. Therefore, the target inlet water temperature of the battery is the first temperature. For example, the first temperature is 25°C. Further, since the battery continuously generates heat during charging, which causes the battery temperature to continue to rise, therefore, the cooling requirement of the battery in the charging state is relatively large, and the cooling function of the thermal management system needs to operate quickly. When the battery is not in the charging state, the battery can also reduce the temperature through its own heat dissipation. At this time, only by maintaining the lowest operating state of the cooling system can the temperature of the battery be reduced. Therefore, if the battery is in the charging state, the alternative temperature is greater than the first temperature. For example, the alternative temperature T1 is equal to 30°C. When the thermal management system obtains that the temperature value of the battery pack inlet water temperature sensor is greater than the target inlet water temperature value, the cooling function of the thermal management system operates quickly to quickly cool the battery pack. If the battery is not in the charging state, the alternative temperature is equal to the first temperature, and the alternative temperature T2 is equal to 25°C. When the thermal management system obtains that the temperature value of the battery pack inlet water temperature sensor is equal to the target inlet water temperature value, the cooling function of the thermal management system operates normally to maintain the lowest operating state of the cooling system and achieve the cooling of the battery.

[0080] It should be understood that although Figure 1 、 Figure 4 、 Figure 6 the steps in the flowchart of Figure 1 、 Figure 4 、 Figure 6At least a part of the steps therein may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed and completed at the same moment, but can be executed at different moments. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0081] Figure 7 FIG. 4 is a schematic structural diagram of a thermal control device for a vehicle thermal management system provided by an embodiment of the present application. As Figure 7 shown, the device may include: an identification unit 701, an acquisition unit 702, a replacement unit 703, and an execution unit 704. The main functions of each component module are as follows:

[0082] The identification unit 701: is used to identify the status of the temperature sensor of the target device, and the target device is a power supply device or a power-consuming device;

[0083] The acquisition unit 702: is used to acquire vehicle status information if it is determined that the temperature sensor fails based on the status of the temperature sensor;

[0084] The replacement unit 703: is used to determine the alternative temperature of the temperature sensor in the target device according to the vehicle status information;

[0085] The execution unit 704: is used to perform thermal control on the power supply device or the power-consuming device based on the alternative temperature.

[0086] In an embodiment of the present application, when the target device is a power supply device, the power supply device includes a battery pack device, and the temperature sensor of the power supply device includes the water inlet temperature sensor of the battery pack device; identifying the status of the temperature sensor of the target device includes: identifying the status of the water inlet temperature sensor of the battery pack device; if it is determined that the temperature sensor fails based on the status of the temperature sensor, acquiring vehicle status information includes: if it is determined that the water inlet temperature sensor of the battery pack device fails based on the status of the water inlet temperature sensor of the battery pack device, acquiring vehicle status information, and the vehicle status information includes one or more of battery temperature information, battery charge status information, and the status information of the water outlet temperature sensor of the battery pack device; determining the alternative temperature of the temperature sensor in the target device according to the vehicle status information includes: determining the alternative temperature of the water inlet temperature sensor of the battery pack device based on one or more of battery temperature information, battery charge status information, and the status information of the water outlet temperature sensor of the battery pack device.

[0087] In one embodiment of the present application, the replacement unit 703 is further configured to: identify whether the water outlet temperature sensor of the battery pack device fails according to the status information of the water outlet temperature sensor of the battery pack device; if it is identified that the water outlet temperature sensor of the battery pack device does not fail, determine to use the temperature of the water outlet temperature sensor of the battery pack device as the alternative temperature of the water inlet temperature sensor of the battery pack device.

[0088] In one embodiment of the present application, the replacement unit 703 is further configured to: if it is identified that the water outlet temperature sensor of the battery pack device fails, determine the alternative temperature of the water inlet temperature sensor of the battery pack device based on the battery temperature information and the battery charging status information.

[0089] In one embodiment of the present application, the replacement unit 703 is further configured to: obtain the target inlet water temperature of the battery pack device; if it is determined based on the battery temperature information that the battery temperature is higher than the maximum value of the rated temperature range and the target inlet water temperature is the first temperature, determine the alternative temperature according to the first temperature and the battery charging status information, the first temperature is less than the maximum value, and the alternative temperature is greater than or equal to the first temperature; if it is determined based on the battery temperature information that the battery temperature is lower than the minimum value of the rated temperature range and the target inlet water temperature is the second temperature, use the second temperature as the replacement temperature, the second temperature is greater than the minimum value and the second temperature is greater than the first temperature; if it is determined based on the battery temperature information that the battery temperature is within the rated temperature range and the target inlet water temperature is the third temperature, use the third temperature as the replacement temperature, and the third temperature is within the rated temperature range.

[0090] In one embodiment of the present application, the replacement unit 703 is further configured to: if it is determined based on the battery charging status information that the battery is in a charging state, the alternative temperature is greater than the first temperature; if it is determined based on the battery charging status information that the battery is not in a charging state, the alternative temperature is equal to the first temperature.

[0091] In one embodiment of the present application, when the target device is a power-consuming device, the power-consuming device includes an electric drive device, and the temperature sensor of the power-consuming device includes a water temperature sensor in the electric drive device; identifying the state of the temperature sensor of the target device includes: identifying the state of the water temperature sensor in the electric drive device; if it is determined that the temperature sensor fails based on the state of the temperature sensor, obtaining vehicle state information includes: if it is determined that the water temperature sensor in the electric drive device fails based on the state of the water temperature sensor in the electric drive device, obtaining vehicle state information, where the vehicle state information includes the state information of other sensors in the electric drive device that are not the water temperature sensor; determining an alternative temperature of the failed temperature sensor in the target device according to the vehicle state information includes: determining an alternative temperature of the water temperature sensor in the electric drive device based on the state information of other sensors in the electric drive device that are not the water temperature sensor.

[0092] In one embodiment of the present application, the replacement unit 703 is further configured to: obtain the temperatures of other sensors in the electric drive device that are not the water temperature sensor; determine the temperatures of other sensors in the electric drive device that are not the water temperature sensor as the alternative temperature of the water temperature sensor in the electric drive device.

[0093] According to the specific embodiments provided by the present application, the technical solutions provided by the present application may have the following advantages:

[0094] By identifying whether the temperature sensor in the power supply device or the power-consuming device fails and determining the alternative temperature of the failed temperature sensor according to the vehicle state information, and then performing thermal management on the power supply device or the power-consuming device based on the alternative temperature, it is possible to keep the thermal management system running normally after the sensor fails, realize the fault handling of the vehicle thermal management system based on state identification, and improve the robustness and stability of the thermal management system and the vehicle control.

[0095] For the same and similar parts among the above embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment.

[0096] According to an embodiment of the present application, the present application further provides a computer device, including at least one processor and a memory communicatively connected to at least one processor; wherein, the memory stores computer instructions executable by at least one processor, and the computer instructions are executed by at least one processor so that at least one processor can execute the thermal control method of the vehicle thermal management system in any of the above embodiments.

[0097] AsFigure 8 As shown, it is a block diagram of a computer device according to an embodiment of the present application. The computer device is intended to represent various forms of digital computers or mobile devices. Among them, digital computers may include desktop computers, portable computers, workstations, personal digital assistants, servers, mainframe computers, and other suitable computers. Mobile devices may include tablet computers, smart phones, wearable devices, etc.

[0098] As Figure 8 shown, the computer device 800 includes a computing unit 801, a ROM 802, a RAM 803, a bus 804, and an input or output (I / O) interface 805. The computing unit 801, the ROM 802, and the RAM 803 are connected to each other via the bus 804. The input or output (I / O) interface 805 is also connected to the bus 804.

[0099] The computing unit 801 can execute various processes in the method embodiments of the present application according to the computer instructions stored in the read-only memory (ROM) 802 or the computer instructions loaded from the storage unit 808 into the random access memory (RAM) 804. The computing unit 801 can be various general and / or special processing components with processing and computing capabilities. The computing unit 801 may include, but is not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. In some embodiments, the method provided by the embodiments of the present application can be implemented as a computer software program, which is tangibly contained in a computer-readable storage medium, such as the storage unit 808.

[0100] The RAM 808 can also store various programs and data required for the operation of the device 800. Part or all of the computer programs can be loaded and / or installed onto the device 800 via the ROM 802 and / or the communication unit 809.

[0101] The input unit 806, the output unit 807, the storage unit 808, and the communication unit 809 in the computer device 800 can be connected to the I / O interface 805. Among them, the input unit 806 can be such as a keyboard, a mouse, a touch screen, a microphone, etc.; the output unit 807 can be such as a display, a speaker, an indicator light, etc. The device 800 can exchange information, data, etc. with other devices through the communication unit 809.

[0102] It should be noted that the device may also include other components necessary for normal operation. It may also only include the components necessary to implement the solution of the present application, and does not necessarily include all the components shown in the figure.

[0103] The various embodiments of the systems and techniques described herein can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof.

[0104] The computer instructions for implementing the methods of the present application can be written in any combination of one or more programming languages. These computer instructions can be provided to the computing unit 801 such that when executed by the computing unit 801, such as a processor, the computer instructions cause the execution of the various steps involved in the method embodiments of the present application.

[0105] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub - combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A thermal control method for a vehicle thermal management system, characterized in that, the method includes: identifying the status of the temperature sensor of the target device, where the target device is a power supply device or a power-consuming device; if it is determined that the temperature sensor fails based on the status of the temperature sensor, obtaining vehicle status information; determining an alternative temperature of the temperature sensor in the target device according to the vehicle status information; performing thermal control on the target device based on the alternative temperature; when the target device is a power-consuming device, the power-consuming device includes an electric drive device, and the temperature sensor of the power-consuming device includes a water temperature sensor in the electric drive device; identifying the status of the temperature sensor of the target device includes: identifying the status of the water temperature sensor in the electric drive device; the step of if it is determined that the temperature sensor fails based on the status of the temperature sensor, obtaining vehicle status information includes: if it is determined that the water temperature sensor in the electric drive device fails based on the status of the water temperature sensor in the electric drive device, obtaining vehicle status information, where the vehicle status information includes the status information of other sensors in the electric drive device that are not the water temperature sensor; the step of determining an alternative temperature of the temperature sensor in the target device according to the vehicle status information includes: determining an alternative temperature of the water temperature sensor in the electric drive device based on the status information of other sensors in the electric drive device that are not the water temperature sensor.

2. The thermal control method for a vehicle thermal management system according to claim 1, characterized in that, the step of determining an alternative temperature of the water temperature sensor in the electric drive device based on the status information of other sensors in the electric drive device that are not the water temperature sensor includes: obtaining the temperatures of other sensors in the electric drive device that are not the water temperature sensor; determining the temperatures of other sensors in the electric drive device that are not the water temperature sensor as the alternative temperature of the water temperature sensor in the electric drive device.

3. A thermal control device for a vehicle thermal management system, characterized in that, the device includes: an identification unit: used to identify the status of the temperature sensor of the target device, where the target device is a power supply device or a power-consuming device; an acquisition unit: used to obtain vehicle status information if it is determined that the temperature sensor fails based on the status of the temperature sensor; a replacement unit: used to determine an alternative temperature of the temperature sensor in the target device according to the vehicle status information; an execution unit: used to perform thermal control on the target device based on the alternative temperature; the power-consuming device includes an electric drive device, and the temperature sensor of the power-consuming device includes a water temperature sensor in the electric drive device; the identification module: is also used to identify the status of the water temperature sensor in the electric drive device; the acquisition module: is also used to obtain vehicle status information if it is determined that the water temperature sensor in the electric drive device fails based on the status of the water temperature sensor in the electric drive device, where the vehicle status information includes the status information of other sensors in the electric drive device that are not the water temperature sensor; The replacement unit: determines an alternative temperature of the water temperature sensor in the electric drive device based on status information of other sensors in the electric drive device that are not the water temperature sensor.

4. A computer device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores computer instructions executable by the at least one processor, and the computer instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1-2.

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