Vehicle control method, device and equipment and storage medium

Abstract

The invention discloses a vehicle control method, device and equipment and a storage medium, and relates to the technical field of vehicle control, and the method comprises the steps that pulse control parameters are determined according to battery parameters of a vehicle-mounted battery, and the pulse control parameters comprise the pulse frequency and the pulse current value; the pulse control parameters are sent to the motor assembly so that the motor assembly can control the power battery to conduct pulse heating through the pulse control parameters, and secondary heating is conducted on the power battery through the battery cooling loop by means of heat generated in the control process of the motor assembly. Due to the fact that heat generated by the power battery and the motor assembly in the pulse current generation process is used for heating the power battery, heat generated by the battery and heat generated by the motor assembly are coordinated for heating the battery, the temperature rise speed is high, and it is guaranteed that the requirement for the low-temperature heating rate can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a vehicle control method, device, equipment and storage medium. BACKGROUND

[0002] In recent years, new energy vehicles have developed rapidly, and power batteries have also been widely used. The charging and discharging performance of power batteries at low temperature will be greatly reduced, which greatly affects the winter driving experience. Therefore, heating is usually used to improve the performance of the battery in a low-temperature environment.

[0003] At present, the heating method is to heat the circulating cooling liquid driven by the water pump by the heater. After the cooling liquid flows through the heater, the cooling liquid is heated and the high-temperature cooling liquid flows into the battery pack cold plate to indirectly heat the battery. However, the liquid heating needs to heat the cooling liquid by the heater first, and then heat the battery by the cooling liquid, which has a large loss, and the initial temperature rise is slow, which is difficult to meet the increasing requirement of low-temperature heating rate. SUMMARY

[0004] The main purpose of the present application is to provide a vehicle control method, device, equipment and storage medium, which aims to solve the technical problems of high loss of related technology heating battery, slow initial temperature rise rate and difficulty in meeting the low-temperature heating rate requirement.

[0005] To achieve the above purpose, the present application provides a vehicle control method applied to a vehicle, wherein the thermal management system of the vehicle comprises a battery cooling circuit, and the battery cooling circuit is provided with a motor assembly, a heat exchanger, a battery cooling water pump and a power battery. The battery cooling water pump drives the cooling liquid in the battery cooling circuit to flow through the power battery pack, the motor assembly and the heat exchanger in turn and then return to the battery cooling water pump. The method comprises: determining pulse control parameters according to the battery parameters of the vehicle-mounted battery, wherein the pulse control parameters comprise pulse frequency and pulse current value; sending the pulse control parameters to the motor assembly, so that the motor assembly controls the power battery to perform pulse heating with the pulse control parameters, and the heat generated in the process of controlling the motor assembly is used to perform secondary heating on the power battery through the battery cooling circuit.

[0006] Optionally, the thermal management system further comprises an air conditioning warm air circuit, and the air conditioning warm air circuit comprises an air conditioning warm air pump, a first heating device and a heat exchanger. The air conditioning warm air pump drives the cooling liquid in the air conditioning warm air circuit to flow through the first heating device and the heat exchanger in turn and then return to the air conditioning warm air circuit, and the first heating device is provided with an air blower, and the heat is exchanged to the inside of the vehicle through the air blower.

[0007] Optionally, a water temperature sensor is arranged between the battery cooling water pump and the power battery, and a second heating device is arranged between the heat exchanger and the battery cooling water pump. After the pulse control parameter is sent to the motor assembly, the method further includes: Monitoring the temperature of the coolant during the pulse heating process through the water temperature sensor; If the temperature of the coolant is less than a first temperature threshold, controlling the second heating device to operate at a preset heating power, and continuing to monitor the temperature of the coolant.

[0008] Optionally, after the temperature of the coolant during the pulse heating process is obtained through the water temperature sensor, the method further includes: If the temperature of the coolant is greater than or equal to a second temperature threshold, controlling the second heating device to be closed, and continuing to monitor the temperature of the coolant, the second temperature threshold being greater than the first temperature threshold.

[0009] After the pulse control parameter is sent to the motor assembly, the method further includes: Determining a target current according to the operating state of the thermal management system; Obtaining the current remaining capacity of the power battery and obtaining the state parameter of the power battery based on the target current; If the current remaining capacity and / or the state parameter meet a pulse exit condition, sending a pulse closing instruction to the motor assembly to make the motor assembly control the power battery to stop pulse heating.

[0010] Optionally, determining the target current according to the operating state of the thermal management system includes: Determining the pulse heating on / off state of the power battery, the on / off state of the second heating device, and the on / off state of the corresponding warm air of the air conditioning warm air circuit according to the operating state of the thermal management system; Determining the target current according to the pulse heating on / off state of the power battery, the on / off state of the second heating device, and the on / off state of the corresponding warm air of the air conditioning warm air circuit.

[0011] Optionally, determining the pulse control parameter according to the battery parameter of the vehicle-mounted battery includes: Determining the pulse control parameter according to the battery parameter of the vehicle-mounted battery when a preset pulse start condition is met; When the following conditions are met, it is determined that the preset pulse start condition is met: The remaining capacity of the power battery is in a preset capacity interval; The minimum battery temperature of the power battery is less than or equal to a preset temperature threshold; The battery health degree of the power battery is greater than or equal to a preset health degree threshold; The cumulative opening time of pulse heating is less than or equal to a preset duration; The vehicle is in a high-voltage parking state.

[0012] In addition, to achieve the above-mentioned purpose, the application also provides a vehicle control device, which is applied to a vehicle, wherein a thermal management system of the vehicle comprises a battery cooling loop, the battery cooling loop is provided with a motor assembly, a heat exchanger, a battery cooling water pump and a power battery; The battery cooling water pump drives the cooling liquid in the battery cooling loop to flow through the power battery pack, the motor assembly and the heat exchanger in turn and then return to the battery cooling water pump. The vehicle control device comprises: A determination module is configured to determine pulse control parameters according to battery parameters of an on-board battery, wherein the pulse control parameters comprise a pulse frequency and a pulse current value. A control module is configured to send the pulse control parameters to the motor assembly, so that the motor assembly controls the power battery to perform pulse heating according to the pulse control parameters, and the power battery is heated again by using heat generated in the control process of the motor assembly through the battery cooling loop.

[0013] In addition, to achieve the above-mentioned purpose, the application also provides a vehicle control device, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle control method.

[0014] In addition, to achieve the above-mentioned purpose, the application also provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the vehicle control method.

[0015] In addition, to achieve the above-mentioned purpose, the application also provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps of the vehicle control method.

[0016] The one or more technical solutions provided by the application have at least the following technical effects: Since the heat generated by the power battery and the motor assembly during the pulse current generation process is used to heat the power battery, the battery self-heat and the motor assembly heat are coordinated to heat the battery, the temperature rise speed is fast, and the low-temperature heating rate requirement can be guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings can also provide other drawings based on these drawings for those ordinarily skilled in the art without creative effort.

[0019] Figure 1 The flowchart provided for the first embodiment of the vehicle control method of the present application; Figure 2 The flowchart provided for the second embodiment of the vehicle control method of the present application; Figure 3 The structure diagram of the thermal management system of an embodiment of the present application; Figure 4 The flowchart provided for the third embodiment of the vehicle control method of the present application; Figure 5 The module structure diagram of the vehicle control device of an embodiment of the present application; Figure 6 The device structure diagram of the hardware running environment involved in the vehicle control method in an embodiment of the present application.

[0020] The object implementation, functional features and advantages of the present application will be further explained with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and not to limit the present application.

[0022] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings of the specification and the specific embodiments.

[0023] Based on this, the embodiments of the present application provide a vehicle control method, referring to Figure 1 , Figure 1 The flowchart provided for the first embodiment of the vehicle control method of the present application.

[0024] In this embodiment, the vehicle control method is applied to a vehicle, and the thermal management system in the vehicle includes a battery cooling circuit, and the battery cooling circuit is provided with a motor assembly, a heat exchanger, a battery cooling water pump and a power battery. In actual application, the motor assembly can include a motor controller, the motor controller can communicate with the vehicle control system (or vehicle controller), and at the same time, the power battery can be controlled to pulse heating.

[0025] The motor controller can control the power battery to generate positive and negative pulse currents. Due to the internal resistance of the power battery, the power battery generates Joule heat during the generation of the pulse currents, thereby achieving self-heating of the battery. This process can be referred to as pulse heating.

[0026] In actual applications, the power battery can be a battery pack, at least one battery cell can be arranged in the battery pack, and a battery management system can also be arranged in the power battery in advance to ensure normal control of the battery. The battery management system communicates with other systems or controllers, for example, communicates with the motor controller and controls the power battery to generate positive and negative pulse currents according to the signals of the motor controller.

[0027] In actual use, the battery cooling water pump drives the cooling liquid in the battery cooling circuit to flow through the power battery pack, the motor assembly, and the heat exchanger in turn and then return to the battery cooling water pump, thereby driving the heat in the battery cooling circuit through the flowing cooling liquid.

[0028] The vehicle control method includes steps S10-S20: Step S10: determining pulse control parameters according to battery parameters of the vehicle-mounted battery.

[0029] It should be noted that the execution subject of the embodiment can be the vehicle itself or a vehicle control device arranged in the vehicle. The vehicle control device can be a controller arranged in the vehicle, such as a vehicle controller, or other devices that can achieve the same or similar functions. The embodiment does not limit this, and the vehicle control method of the application is described below with the vehicle control device as an example.

[0030] It should be noted that the pulse control parameters include pulse frequency and pulse current value. The battery parameters can include battery remaining capacity, battery temperature, etc. The battery temperature can be the average of the temperatures of the battery cells in the battery pack, or the minimum or maximum of the temperatures of the battery cells in the battery pack. The embodiment does not limit this.

[0031] In actual applications, the management personnel of the vehicle control device can pre-set an SOC-battery temperature-pulse parameter mapping table to store the correlation between the battery remaining capacity, the battery temperature, and the pulse parameters.

[0032] On the basis of setting the SOC-battery temperature-pulse parameter mapping table, the process of determining the pulse control parameters according to the battery parameters of the vehicle-mounted battery can be: finding the corresponding pulse control parameters in the SOC-battery temperature-pulse parameter mapping table according to the battery parameters of the vehicle-mounted battery.

[0033] Step S20: sending the pulse control parameters to the motor assembly, so that the motor assembly controls the power battery to generate pulse current according to the pulse control parameters, and the power battery generates Joule heat due to the existence of internal resistance, so as to realize self-heating of the battery, thereby realizing pulse heating of the power battery. During pulse heating, the generated positive and negative pulse currents will also flow through the motor assembly. According to Joule's law, the motor will generate heat loss and heat. The motor controller also generates heat and has resistance. Current flowing through a place with resistance will generate heat. The motor assembly will also generate a large amount of heat. In order to improve the heat utilization rate, the cooling liquid in the battery cooling circuit can be used to conduct the heat generated by the motor assembly to the power battery, thereby realizing secondary heating of the power battery by using the heat generated during the motor assembly control process.

[0034] In actual use, the vehicle control device can send the pulse control parameters to the motor assembly, so that the motor assembly controls the power battery to generate positive and negative pulse currents according to the pulse control parameters. Due to the existence of internal resistance, the power battery can generate Joule heat, thereby realizing self-heating of the battery, and realizing pulse heating of the power battery. During pulse heating, the generated positive and negative pulse currents will also flow through the motor assembly. The motor has resistance, and according to Joule's law, it will generate heat loss and heat. The motor controller also generates heat and has resistance. Current flowing through a place with resistance will generate heat. The motor assembly will also generate a large amount of heat. In order to improve the heat utilization rate, the cooling liquid in the battery cooling circuit can be used to conduct the heat generated by the motor assembly to the power battery, thereby realizing secondary heating of the power battery by using the heat generated during the motor assembly control process.

[0035] In a specific implementation, in order to further improve the heat utilization rate, the heat management system of the embodiment can further include an air conditioning warm air circuit, the air conditioning warm air circuit including an air conditioning warm air pump, a first heating device, and a heat exchanger; The air conditioning warm air pump drives the cooling liquid in the air conditioning warm air circuit to flow through the first heating device and the heat exchanger in turn and then return to the air conditioning warm air circuit. The first heating device is provided with an air blower, which exchanges heat to the inside of the vehicle.

[0036] It can be understood that, in order to further improve the heat utilization rate, in some cases, the heat generated during pulse heating can also be used in the air conditioning system. Based on this, the air conditioning warm air circuit and the battery cooling circuit can share a heat exchanger. Therefore, the air conditioning warm air circuit can absorb the heat in the heat exchanger through the cooling liquid circulating in the air conditioning warm air circuit, and then bring it to the first heating device. Then, the air blower arranged at the first heating device blows the corresponding hot air into the vehicle interior, so as to exchange heat to the inside of the vehicle.

[0037] The first heating device can be a heating core with self-heating function, so as to ensure that when the heat collected through the heat exchanger is insufficient, self-heating can be performed to provide heat, so as to avoid cold air blowing from the air conditioner. In this case, whether the first heating device needs to be started for self-heating can be determined according to the difference between the temperature of the cooling liquid flowing into the first heating device and the actual air conditioning heating target temperature.

[0038] In actual application, the air-conditioning warm air circuit can be started only when the user needs the vehicle-mounted air conditioner to provide warm air.

[0039] In a specific implementation, in order to ensure reasonable vehicle control, the step S10 can include the following steps. When the preset pulse starting condition is met, the pulse control parameter is determined according to the battery parameter of the vehicle-mounted battery.

[0040] It should be noted that if the pulse heating is started at will, it may affect the normal use of the vehicle. Therefore, further judgment is needed. When the preset pulse starting condition is met, the pulse control parameter is determined according to the battery parameter of the vehicle-mounted battery, and subsequent control is performed to start the pulse heating. For example, if the power battery is insufficient, although heating is generated, it may cause the power battery to be insufficient, thereby causing the vehicle to be unable to be normally used.

[0041] In actual use, the preset pulse starting condition can be set by the management personnel of the vehicle control device in advance. For example, it is determined that the preset pulse starting condition is met when the following conditions are met. The remaining power of the power battery is in a preset power interval; The battery minimum temperature of the power battery is less than or equal to a preset temperature threshold; The battery health degree of the power battery is greater than or equal to a preset health degree threshold; The cumulative heating start time is less than or equal to a preset duration; The vehicle is in a high-voltage parking state.

[0042] It can be understood that when the remaining power of the power battery is in the preset power interval, it means that the power of the power battery is sufficient at this time. The battery minimum temperature of the power battery is less than or equal to the preset temperature threshold, which means that the temperature uniformity of the power battery is good. However, the temperature of the battery is low at this time, the performance is poor, the battery health degree of the power battery is greater than or equal to the preset health degree threshold, which means that the health degree of the power battery is high, the cumulative heating start time is less than or equal to the preset duration, which means that the pulse heating is not used for a long time, and the vehicle is in a high-voltage parking state, which means that the vehicle is currently powered on and supports the use of pulse heating. If the above conditions are met, it means that the vehicle can use pulse heating without affecting the normal use of the vehicle at this time. Therefore, the pulse control parameter can be determined according to the battery parameter of the vehicle-mounted battery, and the subsequent steps are executed.

[0043] If any of the above conditions is not met, it can be determined that the use of pulse heating may affect the normal use of the vehicle. At this time, it can be determined that the preset pulse starting condition is not met.

[0044] The embodiment provides a vehicle control method, which heats the power battery by using the heat generated by the power battery and the motor assembly in the pulse current generation process, that is, the battery self-heat and the motor assembly heat are used to heat the battery, the temperature rising speed is fast, and the low-temperature heating rate requirement can be met.

[0045] Based on the first embodiment of the application, the same or similar contents in the second embodiment of the application as the above embodiment one can be referred to the above description, and subsequent details will not be repeated.

[0046] In the embodiment, a water temperature sensor is arranged between the battery cooling water pump and the power battery, and a second heating device is arranged between the heat exchanger and the battery cooling water pump. In order to ensure the effectiveness of the collected cooling liquid temperature, the water temperature sensor is arranged as close to the power battery as possible, so that the temperature value collected by the water temperature sensor is as close to the water temperature at the battery pack inlet as possible, and the second heating device can be an electric heater PTC or a water heater WPTC, which is not limited in the embodiment.

[0047] On this basis, please refer to Figure 2 , after step S30, the vehicle control method further includes steps S40-S50: Step S40: monitoring the cooling liquid temperature in the pulse heating process by the water temperature sensor.

[0048] Step S50: if the cooling liquid temperature is less than the first temperature threshold, controlling the second heating device to operate at a preset heating power, and continuing to monitor the cooling liquid temperature.

[0049] It should be noted that the battery cooling circuit is used to heat the power battery by using the heat generated by the motor assembly in the control process, but the heat generated by the motor assembly in the control process is different under different pulse parameters, and in some cases, if the heat generated by the motor assembly is small, the temperature of the cooling liquid in the battery cooling circuit may be too low, at this time, the effect of the secondary heating of the power battery cannot be achieved, and the temperature in the power battery may be reduced due to the too low temperature of the cooling liquid, thereby reducing the heating effect. In order to avoid this situation, the cooling liquid temperature in the pulse heating process can be monitored by the water temperature sensor.

[0050] It can be understood that if the cooling liquid temperature is less than the first temperature threshold, it indicates that the heat generated by the motor assembly is small, and the temperature of the cooling liquid in the battery cooling circuit is too low, at this time, the heating device can be controlled to operate at a preset heating power to increase the temperature of the cooling liquid in the battery cooling circuit, and the cooling liquid temperature is continuously monitored.

[0051] In actual use, the preset heating power and the first temperature threshold can be set by the manager of the vehicle control device in advance, and it is only necessary to ensure that the battery cooling circuit does not affect the heating effect of the power battery itself. Based on this, it is actually necessary to ensure that the temperature of the coolant in the battery cooling circuit is not lower than the heating target temperature when the power battery is heated. The heating target temperature can be the temperature that needs to be ensured to be reached by the power battery when the power battery is heated.

[0052] In a specific implementation, in order to reduce unnecessary energy loss, the step S40 described in the embodiment can further include: If the coolant temperature is greater than or equal to the second temperature threshold, the second heating device is controlled to be closed, and the coolant temperature is continuously monitored.

[0053] It should be noted that, in order to avoid the second heating device needing to be frequently opened and closed, it is necessary to ensure that after the second heating device stops running, the temperature in the battery cooling circuit will not rapidly decrease below the first temperature threshold within a short time. Based on this, it is necessary to ensure that the second temperature threshold is greater than the first temperature threshold, and the difference between the two needs to reach a certain value, for example, the second temperature threshold is 5°C higher than the first temperature threshold.

[0054] It can be understood that if the coolant temperature is greater than or equal to the second temperature threshold, it means that the coolant temperature in the battery cooling circuit is already relatively high at this time, and even if heating is not performed, it will not have a negative impact on the heating of the power battery. Therefore, the second heating device can be controlled to be closed, and the coolant temperature can be continuously monitored to determine whether the second temperature threshold needs to be opened again.

[0055] It should be noted that the reason why the preset heating power is used as the fixed heating power to control the operation of the second heating device is: If a PWM control mode is used to control the output power of the second heating device through high-frequency opening and closing, due to the irregular switching mode, the power consumption time is relatively random, which causes the current waveform of the pulse heating process to appear irregular deformation. The current equivalent value of such a deformed waveform current is randomly changed, which cannot be used for equivalent current calculation, and ultimately the SOC of the power battery in the pulse heating process cannot be calculated. Therefore, this control mode cannot be used when the pulse heating is turned on, which affects the heating power and heating performance of the thermal management system. And the gear control mode, that is, the second heating device is controlled to run by using fixed heating power. When the second heating device is not turned on, the pulse current waveform remains in the initial state and presents a periodic regular state, and the equivalent current can be calculated. When the second heating device is turned on, since the power consumption of the second heating device is relatively fixed, the pulse current waveform presents a fixed value translation (amplitude direction), and the translated waveform still presents a periodic regularity, so the equivalent power consumption current value can be calculated, and thus the SOC can be calculated. Through this control mode, the heating function of the second heating device can be retained while the pulse heating is turned on, greatly improving the heating performance of the thermal management system.

[0056] For ease of understanding, the present application will be described below in conjunction with Figure 3 , but the application is not limited thereto. Figure 3 The figure is a schematic diagram of the thermal management system of the embodiment.

[0057] As shown in Figure 3 , the vehicle is provided with a vehicle control system (i.e., a vehicle controller loaded with a control system), a battery cooling circuit, and an air conditioning warm air circuit in the thermal management system; The battery cooling circuit is provided with a motor assembly (containing a motor control system), a heat exchanger, a battery cooling water pump, and a power battery pack (i.e., the above-mentioned power battery, containing a battery management system); The air conditioning warm air circuit includes an air conditioning warm air pump, a heating core (i.e., a first heating device), and a heat exchanger; The battery cooling water pump drives the coolant in the battery cooling circuit to flow through the power battery pack, the motor assembly, and the heat exchanger in turn and then return to the battery cooling water pump; The air conditioning warm air pump drives the coolant in the air conditioning warm air circuit to flow through the first heating device and the heat exchanger in turn and then return to the air conditioning warm air circuit. The first heating device is provided with a blower, which exchanges heat to the inside of the vehicle through the blower.

[0058] In addition, a water temperature sensor is arranged between the battery cooling water pump and the power battery, and a WPTC (i.e., a second heating device) is arranged between the heat exchanger and the battery cooling water pump.

[0059] If only the pulse heating is turned on, the motor assembly controls the power battery pack to pulse heat with pulse control parameters, the battery cooling water pump is turned on, the second heating device is turned off, the battery cooling water pump is turned on, and the air conditioning warm air pump, the heating core, and the blower are all in the off state; On the basis of the pulse heating, if it is determined according to the coolant temperature collected by the water temperature sensor that the coolant in the battery cooling circuit needs to be further heated, the WPTC is turned on and runs at a preset heating power; If the air conditioning warm air function is started on the basis of the pulse heating, at this time the air conditioning warm air pump and the air blower are started, and the first heating device determines whether to start according to the temperature of the cooling liquid in the air conditioning cooling circuit and the target temperature.

[0060] The vehicle control method provided in the embodiment ensures that the heating based on the heating device can be further coordinated when the heat is insufficient during the pulse heating, realizes the coordinated work of the three heat sources of the battery self-heat, the motor assembly heat and the heating device heat, and further improves the battery heating performance.

[0061] Based on the second embodiment of the present application, the same or similar contents as the above-mentioned first embodiment can be referred to the above introduction, and will not be described in detail hereinafter.

[0062] On this basis, please refer to Figure 4 , after step S20, the vehicle control method further includes steps S30'~S50': Step S30': determining the target current according to the operating state of the thermal management system.

[0063] It should be noted that, in order to ensure that the power battery automatically exits when it does not support pulse heating, and to avoid the influence of pulse heating on the normal operation of the vehicle, it is necessary to determine the current remaining power of the power battery. However, since the pulse heating is used, the output current of the power battery will change constantly, and at this time the current change frequency exceeds the detection frequency range of the current sensor, so the real-time current cannot be monitored by the current sensor, resulting in that the SOC cannot be estimated. Therefore, the management personnel of the vehicle control device can conduct experiments on the thermal management system, calibrate the equivalent current under the state of opening different functions of the thermal management system during the experiment, and form a corresponding calibration information table for storage; At this time, the corresponding equivalent current value can be found in the calibration information table according to the operating state of the thermal management system, and the found equivalent current value is taken as the target current.

[0064] During the calibration process, the equivalent current can be calculated by the following formula:

[0065] In the formula, the integral time t is an integer multiple of the pulse heating period; Ieq is the equivalent current value, and Iex is the pulse current value.

[0066] In the specific implementation, in order to reasonably obtain the target current as much as possible, the step S30' of the embodiment can include: determine the pulse heating on-off state of the power battery, the on-off state of the second heating device, and the corresponding warm air on-off state of the air conditioning warm air circuit according to the operating state of the thermal management system; determine the target current according to the pulse heating on-off state of the power battery, the on-off state of the second heating device, and the corresponding warm air on-off state of the air conditioning warm air circuit.

[0067] It can be understood that the equivalent current in the thermal management system has a large difference in influence, mainly whether the pulse heating of the power battery is started, whether the second heating device is started, and the corresponding warm air on-off state of the air conditioning warm air circuit. When calibrating, experiments can also be calibrated based on such changes, and a calibration information table can be constructed. When it needs to be determined, the target current can be determined according to the pulse heating on-off state of the power battery, the on-off state of the second heating device, and the corresponding warm air on-off state of the air conditioning warm air circuit.

[0068] For example: when the vehicle is powered on, the pulse heating of the power battery is started, the second heating device is turned off, and the warm air function of the air conditioning warm air circuit is turned off, the current of the power battery I = I0. Through calibration, when the pulse heating of the power battery is started, the second heating device is turned off, and the warm air function of the air conditioning warm air circuit is turned off, the equivalent current I = Ieq1. When the pulse heating of the power battery is started, the second heating device is started, and the warm air function of the air conditioning warm air circuit is turned off, the equivalent current I = Ieq2. When the pulse heating of the power battery is started, the second heating device is started, and the warm air function of the air conditioning warm air circuit is started, the equivalent current I = Ieq3.

[0069] Step S40': based on the target current, the current remaining capacity of the power battery is obtained, and the state parameter of the power battery is obtained.

[0070] It should be noted that after the target current is obtained, the current remaining capacity of the power battery can be determined based on the current integration method, and in order to assist in judging whether to exit the pulse heating, the state parameter of the power battery can also be obtained.

[0071] Step S50': if the current remaining capacity and / or the state parameter meet the pulse exit condition, a pulse closing instruction is sent to the motor assembly to make the motor assembly control the power battery to stop pulse heating.

[0072] In a specific implementation, if the current remaining capacity and / or the state parameter meet the pulse exit condition, it means that at this time, if the vehicle continues to use pulse heating, it may affect the normal operation of the vehicle. At this time, a pulse closing instruction can be sent to the motor assembly to make the motor assembly control the power battery to stop pulse heating.

[0073] Specifically, if the current remaining power is less than the preset exit power threshold, or the battery temperature is greater than the preset exit temperature threshold according to the state parameter of the power battery, it can be determined that the pulse exit condition is met.

[0074] In actual use, in addition to the current remaining power and / or state parameter meeting the pulse exit condition, if any of the following conditions is met, the pulse heating can also be exited: The pulse heating on time is greater than the preset duration; The vehicle is detected to be in a non-high pressure parking state; A vehicle fault is detected; An active closing instruction is received.

[0075] It can be understood that if the pulse heating time continues, it may also affect the normal operation of the vehicle, and the pulse heating can be exited; if the vehicle is in a non-high pressure state, it means that the vehicle is powered off, at this time the vehicle cannot continue to pulse heat and the pulse heating can be exited; if a vehicle fault is detected, it means that the vehicle cannot operate normally, and the pulse heating can be exited; if an active closing instruction is received, it means that the user indicates to exit the pulse heating, at this time the pulse heating can be exited according to the user's indication.

[0076] In actual application, after exiting the pulse heating, it can also be detected whether the air conditioner is in an on state, if so, it is switched to a normal air conditioning mode, avoiding the exit of the pulse heating and the closing of the air conditioner, and avoiding the reduction of user experience.

[0077] The embodiment provides a vehicle control method, since during the pulse heating process, the equivalent current is also determined according to the running state of the thermal management system, it is ensured that the remaining power of the power battery can still be determined in the pulse heating state, the pulse heating can be reasonably exited, and the influence on the normal operation of the vehicle is avoided.

[0078] It should be noted that the above examples are only used for understanding the present application and do not constitute a limitation on the vehicle control method of the present application, and more forms of simple transformation based on the technical concept are within the protection scope of the present application.

[0079] The present application also provides a vehicle control device, please refer to Figure 5 for a vehicle, wherein the thermal management system of the vehicle comprises a battery cooling circuit, the battery cooling circuit is provided with a motor assembly, a heat exchanger, a battery cooling water pump and a power battery; The battery cooling water pump drives the cooling liquid in the battery cooling circuit to flow through the power battery pack, the motor assembly and the heat exchanger in turn, and then returns to the battery cooling water pump; The vehicle control device comprises: The determining module 10 is configured to determine pulse control parameters according to the battery parameters of the vehicle-mounted battery, wherein the pulse control parameters include a pulse frequency and a pulse current value. The control module 20 is configured to send the pulse control parameters to the motor assembly, so that the motor assembly controls the power battery to perform pulse heating according to the pulse control parameters, and performs secondary heating on the power battery by using the heat generated in the control process of the motor assembly.

[0080] The vehicle control device provided in the present application adopts the vehicle control method in the above-mentioned embodiments, and can solve the technical problem of high battery loss, slow pre-warming rate and difficulty in meeting the low-temperature heating rate requirement in the related art. Compared with the prior art, the vehicle control device provided in the present application has the same beneficial effects as the vehicle control method provided in the above-mentioned embodiments, and other technical features in the vehicle control device are the same as the features disclosed in the above-mentioned embodiments, which will not be repeated here.

[0081] The present application provides a vehicle control device, which comprises at least one processor and a memory connected with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the vehicle control method in the above-mentioned embodiment one.

[0082] Reference will now be made to the following description Figure 6 which shows a structural schematic diagram of a vehicle control device suitable for implementing the embodiments of the present application. The vehicle control device in the embodiments of the present application can include but is not limited to mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description), PMPs (Portable Media Player), vehicle-mounted terminals (for example, vehicle-mounted navigation terminals) and the like, and fixed terminals such as digital TVs, desktop computers and the like. Figure 6 The vehicle control device shown is only an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0083] As Figure 6As shown, the vehicle control device can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to programs stored in a read-only memory 1002 or loaded from a storage device 1003 into a random access memory 1004. Various programs and data required for operation of the vehicle control device are also stored in the random access memory 1004. The processing device 1001, the read-only memory 1002, and the random access memory 1004 are connected to each other by a bus 1005. An input / output interface 1006 is also connected to the bus. Generally, the following systems can be connected to the input / output interface 1006: input devices 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle control device to communicate wirelessly or by wire with other devices to exchange data. Although the vehicle control device having various systems is shown in the figure, it should be understood that all of the systems shown are not required to be implemented or possessed. More or fewer systems can be alternatively implemented or possessed.

[0084] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by a communication device, or installed from the storage device 1003, or installed from the read-only memory 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of embodiments of the present disclosure are performed.

[0085] The vehicle control device provided by the present disclosure adopts the vehicle control method in the above-mentioned embodiments, and can solve the technical problems of high battery loss, slow pre-warming rate, and difficulty in meeting the low-temperature heating rate requirement in the related art. Compared with the prior art, the vehicle control device provided by the present disclosure has the same beneficial effects as the vehicle control method provided by the above-mentioned embodiments, and other technical features in the vehicle control device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0086] It should be understood that various aspects of the disclosure can be implemented in hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any appropriate manner in any one or more embodiments or examples.

[0087] The above description is merely illustrative of the application and is not intended to limit the scope of the application. Any variations and modifications that can be made by any person skilled in the art within the spirit and scope of the application are intended to be encompassed by the application. Therefore, the scope of the application should be determined by the appended claims.

[0088] The application provides a computer readable storage medium having stored thereon computer readable program instructions (i.e., a computer program) for performing the vehicle control method in the above-described embodiments.

[0089] The computer readable storage medium provided by the application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system or device, or any combination thereof. More specific examples of the computer readable storage medium can include, but are not limited to, an electric connection having one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable programmable read only memory (EPROM or flash memory), an optical fiber, a portable compact disk read only memory (CD-ROM), an optical storage device, a magnetic storage device, or any appropriate combination thereof. In the present embodiment, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer readable storage medium can be transmitted by any appropriate medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), etc., or any appropriate combination thereof.

[0090] The above-described computer readable storage medium can be included in a vehicle control device; or can exist separately without being assembled into a vehicle control device.

[0091] The computer readable storage medium described above carries one or more programs, when the one or more programs are executed by the vehicle control device, the vehicle control device is caused to: determine pulse control parameters according to a battery parameter of the vehicle-mounted battery, the pulse control parameters including a pulse frequency and a pulse current value; and send the pulse control parameters to the motor assembly, so that the motor assembly controls the power battery to perform pulse heating according to the pulse control parameters, and the power battery is secondarily heated by using heat generated in the motor assembly control process through the battery cooling loop.

[0092] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Python, Java, Smalltalk, C++, or the like, and conventional procedural programming languages, such as the "C" programming language, or the like. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0093] The flow diagrams and the block diagrams in the drawings are illustrations of architectures, functionalities, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flow diagrams or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and / or flow diagrams, and combinations thereof, can be implemented by special purpose hardware-based systems that perform the specified functions or operations, or combinations of special purpose hardware and computer instructions.

[0094] The modules involved in the embodiments of the present application can be implemented in a software manner or in a hardware manner. In some cases, the name of the module does not constitute a limitation on the module itself.

[0095] The readable storage medium provided by the application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer programs) for executing the vehicle control method described above, and can solve the technical problems of high battery loss, slow initial temperature rise rate and difficulty in meeting the low temperature heating rate requirement in the related art. Compared with the prior art, the computer readable storage medium provided by the application has the same beneficial effects as the vehicle control method provided by the above-mentioned embodiments, which will not be repeated here.

[0096] The application further provides a computer program product comprising a computer program, which, when executed by a processor, implements the steps of the vehicle control method as described above.

[0097] The computer program product provided by the application can solve the technical problems of high battery loss, slow initial temperature rise rate and difficulty in meeting the low temperature heating rate requirement in the related art. Compared with the prior art, the computer program product provided by the application has the same beneficial effects as the vehicle control method provided by the above-mentioned embodiments, which will not be repeated here.

[0098] The above only describes some embodiments of the application, and does not limit the protection scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the application, and the contents of the specification and drawings are included in the protection scope of the application.

Claims

1. A vehicle control method, characterized in that, Applied to vehicles, the thermal management system in the vehicle includes a battery cooling circuit, in which a motor assembly, a heat exchanger, a battery cooling water pump, and a power battery are installed; The battery cooling water pump drives the coolant in the battery cooling circuit to flow through the power battery pack, motor assembly, and heat exchanger before returning to the battery cooling water pump. The vehicle control method includes: The pulse control parameters are determined based on the battery parameters of the vehicle battery, and the pulse control parameters include the pulse frequency and the pulse current value. The pulse control parameters are sent to the motor assembly so that the motor assembly controls the power battery to perform pulse heating according to the pulse control parameters, and uses the heat generated during the control process of the motor assembly to perform secondary heating of the power battery through the battery cooling circuit.

2. The vehicle control method as described in claim 1, characterized in that, The thermal management system also includes an air conditioning heating circuit, which includes an air conditioning heating water pump, a first heating device, and a heat exchanger. The air conditioning heater water pump drives the coolant in the air conditioning heater circuit to flow sequentially through the first heating device and the heat exchanger before returning to the air conditioning heater circuit. A blower is installed at the first heating device to exchange heat to the interior of the vehicle.

3. The vehicle control method as described in claim 2, characterized in that, A water temperature sensor is installed between the battery cooling water pump and the power battery, and a second heating device is installed between the heat exchanger and the battery cooling water pump. After sending the pulse control parameters to the motor assembly, the process further includes: The coolant temperature during the pulse heating process is monitored using the water temperature sensor. If the coolant temperature is lower than the first temperature threshold, the second heating device is controlled to operate at a preset heating power, and the coolant temperature is continuously monitored.

4. The vehicle control method as described in claim 3, characterized in that, After obtaining the coolant temperature during the pulse heating process through the water temperature sensor, the method further includes: If the coolant temperature is greater than or equal to the second temperature threshold, the second heating device is controlled to shut down, and the coolant temperature is monitored continuously, wherein the second temperature threshold is greater than the first temperature threshold.

5. The vehicle control method as described in claim 3, characterized in that, After sending the pulse control parameters to the motor assembly, the process further includes: The target current is determined based on the operating status of the thermal management system; The current remaining power of the power battery is obtained based on the target current, and the state parameters of the power battery are also obtained. If the current remaining power and / or status parameters meet the pulse exit condition, a pulse shutdown command is sent to the motor assembly so that the motor assembly controls the power battery to stop pulse heating.

6. The vehicle control method as described in claim 5, characterized in that, Determining the target current based on the operating status of the thermal management system includes: The pulse heating on / off state of the power battery, the on / off state of the second heating device, and the heating on / off state of the corresponding air conditioning heating circuit are determined based on the operating status of the thermal management system. The target current is determined based on the pulse heating on / off state of the power battery, the on / off state of the second heating device, and the heating on / off state of the corresponding air conditioning heating circuit.

7. The vehicle control method according to any one of claims 1-6, characterized in that, The step of determining the pulse control parameters based on the battery parameters of the vehicle battery includes: When the preset pulse start-up conditions are met, the pulse control parameters are determined based on the battery parameters of the vehicle battery. The preset pulse start condition is determined to be met when the following conditions are met: The remaining power of the power battery is within a preset power range; The minimum temperature of the power battery is less than or equal to a preset temperature threshold. The battery health status of the power battery is greater than or equal to a preset health status threshold. The cumulative pulse heating time is less than or equal to the preset duration. The vehicle is in a high-voltage parking state.

8. A vehicle control device, characterized in that, Applied to vehicles, the thermal management system in the vehicle includes a battery cooling circuit, in which a motor assembly, a heat exchanger, a battery cooling water pump, and a power battery are installed; The coolant in the battery cooling circuit driven by the battery cooling water pump flows sequentially through the power battery pack, the motor assembly, and the heat exchanger before returning to the battery cooling water pump. The vehicle control device includes: The determination module is used to determine pulse control parameters based on the battery parameters of the vehicle battery, wherein the pulse control parameters include pulse frequency and pulse current value; The control module is used to send the pulse control parameters to the motor assembly, so that the motor assembly controls the power battery to perform pulse heating according to the pulse control parameters, and uses the heat generated during the control process of the motor assembly to perform secondary heating of the power battery through the battery cooling circuit.

9. A vehicle control device, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle control method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the vehicle control method as described in any one of claims 1 to 7.

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