Thermal insulation control system, method and equipment for power battery of electric automobile

Abstract

The invention discloses a power battery heat preservation control system, method and equipment of an electric vehicle. The power battery heat preservation control system comprises a temperature detection device, an electric quantity detection device, a battery controller, a whole vehicle controller, a vehicle-mounted networking module and a heat management controller. The temperature detection device is used for obtaining the cell temperature of the power battery. The electric quantity detection device is used for obtaining residual electric quantity of the power battery. The battery controller is used for sending a temperature maintaining request and the residual electric quantity to the vehicle control unit under the conditions that the electric vehicle is in a parking state and the temperature of the battery cell is within a set temperature range. And the vehicle control unit responds to the temperature maintaining request and controls a heat management controller and a vehicle-mounted networking module according to the remaining electric quantity, so that the heat management controller controls a vehicle-mounted air conditioner to operate, and the battery cell temperature of the power battery is adjusted to the target temperature. According to the invention, the technical problem that the electric vehicle cannot be normally started after being parked in an extremely severe weather area is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle control, and particularly relates to a power battery thermal insulation control method, system and device for an electric vehicle. Background Art

[0002] After an electric vehicle is parked in an area with extremely cold or hot weather, the vehicle cannot be powered on at high voltage because the core temperature of the power battery exceeds its set operating temperature range. Although electric vehicles have excellent performance in many aspects, due to the physical performance limitations of the power battery cores, when their temperature is higher than a certain value (usually 56°C) or lower than a certain value (usually -30°C), the power battery will activate a protection mechanism, resulting in the vehicle being unable to be powered on at high voltage beyond the operating temperature range of the power battery, and thus the vehicle cannot be started. Summary of the Invention

[0003] Embodiments of the present invention provide a power battery thermal insulation control method, system and device for an electric vehicle, so as to solve the technical problem that an electric vehicle cannot be started normally after being parked in an area with extremely bad weather.

[0004] According to a first aspect of the present invention, there is provided a power battery thermal insulation control system for an electric vehicle. The power battery thermal insulation control system includes: a temperature detection device, a power detection device, a battery controller, a vehicle controller, an in-vehicle networking module, and a thermal management controller for connecting to an in-vehicle air conditioner; the temperature detection device is used to obtain the core temperature of the power battery; the power detection device is used to obtain the remaining power of the power battery; the battery controller is connected to the temperature detection device and the power detection device, and the battery controller is configured to: when the electric vehicle is in a parked state, receive the core temperature from the temperature detection device and the remaining power from the power detection device, determine whether the core temperature is within a set temperature range, and if so, send a temperature maintenance request and the remaining power to the vehicle controller; the vehicle controller is connected to the battery controller and is configured to respond to the temperature maintenance request, control the thermal management controller and the in-vehicle networking module according to the remaining power, so that the thermal management controller controls the in-vehicle air conditioner to operate and adjusts the core temperature of the power battery to a target temperature, and the target temperature is within the operating temperature range of the power battery.

[0005] In combination with the first aspect, in some embodiments, the vehicle controller is configured to: when the remaining power is higher than the first safety power, send a first control command to the thermal management controller; when the remaining power is lower than or equal to the first safety power and higher than the second safety power, send a second control command to the thermal management controller and control the vehicle-mounted networking module to send the state information of the power battery and the vehicle-mounted air conditioner to the user terminal, where the state information includes the remaining power; when the remaining power is lower than or equal to the second safety power, control the vehicle-mounted networking module to send a first reminder message and the state information of the power battery and the vehicle-mounted air conditioner to the user terminal, where the first reminder message is used to remind the user to charge or rescue the electric vehicle; the thermal management controller is configured to: if receiving the first control command, control the vehicle-mounted air conditioner to adjust the core temperature of the power battery to a first target temperature; if receiving the second control command, control the vehicle-mounted air conditioner to adjust the core temperature of the power battery to a second target temperature, and adjusting the core temperature of the power battery to the second target temperature consumes less power of the power battery than adjusting it to the first target temperature.

[0006] In combination with the first aspect, in some embodiments, the electric vehicle is a hybrid vehicle, and the thermal insulation control system further includes an oil quantity detection device and an engine controller, and the oil quantity detection device, the vehicle controller and the engine controller are connected; the oil quantity detection device is configured to: obtain the remaining oil quantity of the hybrid vehicle; the vehicle controller is further configured to: when the remaining power is lower than or equal to a third safety power, send a target control command to the engine controller, where the third safety power is less than or equal to the first safety power and greater than or equal to the second safety power; the engine controller is configured to: in response to the target control command, detect whether the remaining oil quantity is greater than or equal to a first oil quantity threshold, and if so, control the engine to charge the power battery.

[0007] In combination with the first aspect, in some embodiments, the engine controller is further configured to: in response to the target control command, detect whether the remaining fuel quantity triggers a fuel quantity alarm; if it is detected that the remaining fuel quantity triggers a first-level fuel quantity alarm, control the engine to charge the power battery and feedback the first-level fuel quantity alarm to the vehicle controller; if it is detected that the remaining fuel quantity triggers a second-level fuel quantity alarm, prohibit the engine from charging the power battery and feedback the second-level fuel quantity alarm to the vehicle controller; the vehicle controller is further configured to: if receiving the first-level fuel quantity alarm, control the vehicle-mounted networking module to send a second reminder message to the user terminal; if receiving the second-level fuel quantity alarm, issue a prohibition command to the battery controller and the thermal management controller, and control the vehicle-mounted networking module to send a second reminder message to the user terminal; the battery controller, in response to the prohibition command, prohibits the power battery from supplying power to the vehicle-mounted air conditioner, and the thermal management controller, in response to the prohibition command, prohibits the vehicle-mounted air conditioner from operating; wherein, the second reminder message is used to remind the user to refuel the hybrid vehicle, the remaining fuel quantity lower than the first fuel quantity threshold triggers the first-level fuel quantity alarm, the remaining fuel quantity lower than the second fuel quantity threshold triggers the second-level fuel quantity alarm, and the second fuel quantity threshold is lower than the first fuel quantity threshold.

[0008] In combination with the first aspect, in some embodiments, the battery controller is further configured to: after the core temperature of the power battery meets the target temperature, send a heat preservation end request to the vehicle controller; the vehicle controller is further configured to: in response to the heat preservation end request, send a shutdown control command to the thermal management controller; the thermal management controller is further configured to: if receiving the shutdown control command, control the vehicle-mounted air conditioner to shut down.

[0009] In combination with the first aspect, in some embodiments, the vehicle controller is further configured to: in response to a function shutdown instruction, shut down the heat preservation control function of the electric vehicle. When the heat preservation control function of the electric vehicle is in a shutdown state, if the core temperature is within the set temperature range, the battery controller does not send a temperature maintenance request to the vehicle controller or the vehicle controller does not respond to the temperature maintenance request initiated by the battery controller; wherein, the function shutdown instruction comes from the user terminal and is generated by the user's operation on the user terminal, or is generated according to the user's operation on the electric vehicle, or is generated when the duration of the remaining battery power being lower than or equal to the second safe battery power reaches a preset duration, or when the parking duration of the electric vehicle reaches a preset duration.

[0010] In combination with the first aspect, in some embodiments, the vehicle controller is further configured to: after turning off the thermal insulation control function of the electric vehicle, in response to a function activation instruction, activate the thermal insulation control function of the electric vehicle, so that when the cell temperature is within a set temperature range, the battery controller sends a temperature maintenance request and the remaining power to the vehicle controller; wherein, the function activation instruction is from a user terminal, generated by a user's operation on the user terminal, or generated according to a user's operation on the electric vehicle, or generated when charging the electric vehicle so that the remaining power is higher than the first safety power.

[0011] In combination with the first aspect, in some embodiments, the vehicle controller is further configured to: adjust the first target temperature and the second target temperature according to the remaining power, and / or; obtain a temperature set value input by a user, and adjust the first target temperature and the second target temperature according to the temperature set value.

[0012] According to a second aspect of the present invention, there is provided a method for controlling the thermal insulation of a power battery of an electric vehicle, including: when the electric vehicle is in a parked state, obtaining the cell temperature and the remaining power of the power battery; determining whether the cell temperature is within a set temperature range; if the cell temperature is within the set temperature range, controlling the in-vehicle air conditioner and the in-vehicle networking module of the electric vehicle to work according to the remaining power, so as to adjust the cell temperature of the power battery to a target temperature, and the target temperature is within the working temperature range of the power battery.

[0013] According to a third aspect of the present invention, there is provided an electronic device, including a processor and a memory, the memory is coupled to the processor, and the memory stores instructions, and when the instructions are executed by the processor, the method for controlling the thermal insulation of the power battery of the electric vehicle according to any embodiment of the first aspect is implemented.

[0014] One or more technical solutions provided by the embodiments of the present invention at least achieve the following technical effects or advantages:

[0015] The power battery thermal management control system of the electric vehicle provided by the embodiment of the present invention, when the electric vehicle is in a parked state, receives the cell temperature from the temperature detection device and the remaining power from the power detection device through the battery controller, and determines whether the cell temperature is within the set temperature range. When the cell temperature is within the set temperature range, a temperature maintenance request and the remaining power are sent to the vehicle controller, so that the vehicle controller can respond to the temperature maintenance request and control the thermal management controller and the vehicle-mounted networking module according to the remaining power. The thermal management controller, under the control of the vehicle controller, controls the vehicle-mounted air conditioner to adjust the cell temperature of the power battery to the target temperature within the operating temperature range of the power battery, and can also be shared with the user when the remaining power of the power battery is low, enabling the user to be informed and handle it in a timely manner. In this way, when the electric vehicle is parked in areas with extremely cold, extremely hot and other extreme weather conditions, the power battery is always in a comfortable operating temperature range. Therefore, the electric vehicle can be powered on at high voltage at any time in extremely cold and extremely hot areas. Thus, the electric vehicle can also start and drive normally after being parked in extremely cold and extremely hot areas, expanding the operating temperature range of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0017] Figure 1 FIG. shows the structural schematic diagram of the power battery thermal management control system of the electric vehicle in some embodiments of the present invention;

[0018] Figure 2 FIG. shows the structural schematic diagram of the power battery thermal management control system of the electric vehicle in other embodiments of the present invention;

[0019] Figure 3 FIG. shows the flowchart of the power battery thermal management control method of the electric vehicle in some embodiments of the present invention;

[0020] Figure 4 FIG. shows the structural schematic diagram of the electronic device in some embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] An embodiment of the present invention provides a thermal management control system for a power battery of an electric vehicle. Figure 1 The structural schematic diagram of the thermal management control system for the power battery of the electric vehicle in some embodiments of the present invention is shown. As Figure 1 shown, the thermal management control system for the power battery includes: a temperature detection device 110, a power detection device 120, a battery controller 130, a vehicle controller 140, a vehicle-mounted networking module 150, a vehicle-mounted air conditioner 160, and a thermal management controller 170 connected to the vehicle-mounted air conditioner 160. Both the temperature detection device 110 and the power detection device 120 are connected to the battery controller 130, and the battery controller 130, the thermal management controller 170, and the vehicle-mounted networking module 150 are all connected to the vehicle controller 140.

[0023] The temperature detection device 110 is used to obtain the cell temperature of the power battery. In some embodiments, the temperature detection device 110 is used to: when the electric vehicle is in a parked state, monitor the cell temperature of the power battery in real time and provide it to the battery controller 130.

[0024] The power detection device 120 is used to obtain the remaining power of the power battery. In some embodiments, the power detection device 120 is used to: when the electric vehicle is in a parked state, monitor the remaining power of the power battery in real time and provide it to the battery controller 130.

[0025] The battery controller 130 is used to: when the electric vehicle is in a parked state, receive the cell temperature of the power battery from the temperature detection device 110, and receive the remaining power of the power battery from the power detection device 120, and determine whether the cell temperature of the power battery is within the set temperature range; if so, send a temperature maintenance request and the remaining power of the power battery to the vehicle controller 140.

[0026] It can be understood that the above set temperature range is the temperature range used to determine whether thermal insulation of the power battery is required. Whether the core temperature of the power battery is within the set temperature range indicates that the power battery cannot be powered on at high voltage. The set temperature range can be set according to the operating temperature range of the power battery. The set temperature range can be the complement of the operating temperature range in the entire temperature range. For example, if the operating temperature range of the power battery is the temperature interval [-30°C, 56°C], then the set temperature range is the temperature range below -30°C and above 56°C. To improve the reliability of thermal insulation of the power battery, the set temperature range can have an intersection with the operating temperature range. For example, the set temperature range is the temperature range below -25°C and above 50°C.

[0027] The vehicle controller 140 is configured to: in response to a temperature maintenance request and the remaining battery power from the battery controller 130, control the thermal management controller 170 and the vehicle networking module 150 according to the remaining battery power, so that under the control of the vehicle controller 140, the thermal management controller 170 controls the vehicle air conditioner 160 to operate, and the operation of the vehicle air conditioner 160 adjusts the core temperature of the power battery to a target temperature, where the target temperature is within the operating temperature range of the power battery.

[0028] In some embodiments, the temperature value of the target temperature can be divided into a first target temperature and a second target temperature according to the remaining battery power:

[0029] In some embodiments, when the vehicle controller 140 controls the thermal management controller 170 and the vehicle networking module 150 according to the remaining battery power, the vehicle controller 140 is specifically configured to: when the remaining battery power of the power battery is higher than the first safety power, send a first control command to the thermal management controller 170.

[0030] In some embodiments, the first control command includes the first target temperature, and the thermal management controller 170 is configured to: if receiving the first control command from the vehicle controller 140, control the vehicle air conditioner 160 to operate to adjust the core temperature of the power battery to the first target temperature.

[0031] In other embodiments, the first control command includes the first target temperature and a power setting for the vehicle air conditioner 160. The thermal management controller 170 is configured to: if receiving the first control command from the vehicle controller 140, control the vehicle air conditioner 160 to operate at the set first power to adjust the core temperature of the power battery to the first target temperature.

[0032] In some embodiments, when the vehicle controller 140 controls the thermal management controller 170 and the vehicle networking module 150 according to the remaining battery power, the vehicle controller 140 is specifically configured to: when the remaining battery power is lower than or equal to the first safety power and higher than the second safety power, send a second control command to the thermal management controller 170, and control the vehicle networking module 150 to send the state information of the power battery and the vehicle air conditioner 160 to the user terminal, where the state information of the power battery includes the remaining battery power of the power battery. It may also include information such as whether the power battery supplies power to the vehicle air conditioner and whether the vehicle air conditioner is operating.

[0033] It can be understood that the second safety power is lower than the first safety power. Exemplarily, the first safety power can be set to a value within the range of 20%-40%, and the second safety power can be a value within the range of 10%-20%.

[0034] In some embodiments, the second control command includes a second target temperature. The thermal management controller 170 is configured to: if it receives the second control command from the vehicle controller 140, control the vehicle air conditioner 160 to operate to adjust the core temperature of the power battery to the second target temperature.

[0035] In other embodiments, the second control command includes a second target temperature and a power setting for the vehicle air conditioner 160. The thermal management controller 170 is configured to: if it receives the second control command from the vehicle controller 140, control the vehicle air conditioner 160 to operate at the set second power to adjust the core temperature of the power battery to the second target temperature.

[0036] It can be understood that the second power is less than the first power.

[0037] It can be understood that the first target temperature is different from the second target temperature. Adjusting the core temperature of the power battery to the second target temperature consumes less power of the power battery than adjusting it to the first target temperature.

[0038] In some embodiments, when the vehicle controller 140 determines whether the core temperature of the power battery is within the set temperature range, it determines whether the core temperature of the power battery is less than the first temperature threshold and determines whether the core temperature of the power battery is greater than the second temperature threshold. The first temperature threshold and the second temperature threshold are the lower temperature value and the upper temperature value of the operating temperature range of the power battery, and the second temperature threshold is greater than the first temperature threshold. If the core temperature of the power battery is less than the first temperature threshold, control the vehicle air conditioner 160 to heat up to heat the core temperature of the power battery to the target temperature; if the core temperature of the power battery is greater than the second temperature threshold, control the vehicle air conditioner 160 to cool down to cool the core temperature of the power battery to the target temperature.

[0039] It can be understood that the first target temperature and the second target temperature are two temperature points within the operating temperature range of the power battery. Both the first target temperature and the second target temperature are greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold. When the vehicle-mounted air conditioner 160 cools the power battery, the first target temperature is lower than the second target temperature. When the vehicle-mounted air conditioner 160 heats the power battery, the first target temperature is higher than the second target temperature. Thus, the temperature value of the target temperature for adjusting the temperature of the battery cells of the power battery is adjusted according to the remaining power of the power battery, achieving a balance between energy consumption and temperature adjustment effect.

[0040] In some embodiments, the first target temperature is the temperature value in the middle temperature range within the operating temperature range of the power battery, and the second target temperature is the temperature value close to the upper and lower temperature values within the operating temperature range of the power battery.

[0041] Taking the operating temperature range of the power battery as the temperature range [-30°C, 56°C] as an example, the first temperature threshold is -30°C, and the second temperature threshold is 56°C. The first target temperature and the second target temperature are any two temperature points within the temperature range [-30°C, 56°C]. Exemplarily, the first target temperature is the temperature value in the middle range of this interval, such as the temperature value within the range of 16°C - 17°C. When the vehicle-mounted air conditioner 160 cools the power battery, the first target temperature can be a temperature value slightly larger than -30°C, such as a temperature value within the range of -25°C to 10°C. When the vehicle-mounted air conditioner 160 heats the power battery, the first target temperature can be a temperature value slightly smaller than 56°C, such as a temperature value within the range of 40°C to 50°C.

[0042] In some other embodiments, the first control command is the same as the second control command, that is, the first target temperature is the same as the second target temperature, and the first power is the same as the second power.

[0043] In some embodiments, the vehicle controller 140 is further configured to: when the remaining power of the power battery is lower than or equal to the second safety power, control the vehicle-mounted networking module 150 to send a first reminder message and the status information of the power battery and the vehicle-mounted air conditioner 160 to the user terminal. The first reminder message is used to remind the user to charge the electric vehicle or request rescue, so that the first reminder message and the status information of the power battery and the vehicle-mounted air conditioner 160 are transmitted to the user terminal through the vehicle network, such as a mobile phone APP, and thus shared with the user. Also, the vehicle-mounted air conditioner 160 will not be started to adjust the temperature of the power battery, avoiding the exhaustion of the power of the power battery.

[0044] Figure 2 The structural schematic diagram of the power battery thermal insulation control system of an electric vehicle in some other embodiments of the present invention is shown. As Figure 2As shown, in some embodiments, the electric vehicle is a hybrid vehicle. After each device shown in Figure 1 , the thermal insulation control system further includes a fuel quantity detection device 190 and an engine controller 180. The fuel quantity detection device 190 and the vehicle controller 140 are both connected to the engine controller 180.

[0045] The vehicle controller 140 is further configured to: when the remaining power of the power battery is lower than or equal to a third safety power, send a target control command to the engine controller 180, where the third safety power is less than or equal to the first safety power and greater than or equal to the second safety power.

[0046] The fuel quantity detection device 190 is configured to: obtain the remaining fuel quantity of the hybrid vehicle. In some embodiments, when the hybrid vehicle is in a parked state, the fuel quantity detection device 190 monitors the remaining fuel quantity of the hybrid vehicle in real time and provides it to the engine controller 180.

[0047] The engine controller 180 is configured to: in response to the target control command from the vehicle controller 140, detect whether the remaining fuel quantity of the hybrid vehicle is greater than or equal to a first fuel quantity threshold. If the remaining fuel quantity of the hybrid vehicle is greater than or equal to the first fuel quantity threshold, control the engine of the hybrid vehicle to charge its power battery, where the first fuel quantity threshold is the fuel quantity that supports the engine of the hybrid vehicle to start and run for a target duration.

[0048] According to the cooperation among the engine controller 180, the fuel quantity detection device 190, and the vehicle controller 140 in the above embodiments, when the hybrid vehicle has sufficient fuel, the engine can be started to charge the power battery to supplement the power of the power battery, so that the power battery can continue to supply power for the operation of the vehicle-mounted air conditioner 160, and the core temperature of the power battery can be adjusted to the target temperature required for high-voltage power-on and the start and driving of the hybrid vehicle.

[0049] In some embodiments, the vehicle controller 140 is further configured to: control the vehicle-mounted networking module 150 to send the status information of the engine to the user terminal. The status information of the engine includes the start / stop prompt of the engine, the remaining fuel quantity, etc., so that the user can timely know the status change of the engine.

[0050] In some embodiments, the engine controller 180 is further configured to: when the remaining power of the power battery is lower than or equal to the third safety power, detect whether the remaining fuel of the hybrid vehicle triggers a fuel alarm; if it is detected that the remaining fuel of the hybrid vehicle triggers a first-level fuel alarm, control the engine to charge the power battery, and feedback the first-level fuel alarm to the vehicle controller 140; if it is detected that the remaining fuel of the hybrid vehicle triggers a second-level fuel alarm, prohibit the engine from charging the power battery, and feedback the second-level fuel alarm to the vehicle controller 140.

[0051] The vehicle controller 140 is further configured to: if receiving the first-level fuel alarm from the engine controller 180, control the vehicle-mounted networking module 150 to send a second reminder message to the user terminal, where the second reminder message is used to remind the user to refuel the hybrid vehicle; if receiving the second-level fuel alarm from the engine controller 180, initiate a prohibition command to the battery controller 130 and the thermal management controller 170, and control the vehicle-mounted networking module 150 to send a second reminder message to the user terminal.

[0052] It can be understood that in response to the prohibition command from the vehicle controller 140, the battery controller 130 prohibits the power battery from supplying power to the vehicle-mounted air conditioner 160, and in response to the prohibition command from the vehicle controller 140, the thermal management controller 170 prohibits the vehicle-mounted air conditioner 160 from operating, and the second reminder message is used to remind the user to refuel the hybrid vehicle.

[0053] It can be understood that when the remaining fuel of the hybrid vehicle is lower than the first fuel threshold, a first-level fuel alarm is triggered, and when the remaining fuel of the hybrid vehicle is lower than the second fuel threshold, a second-level fuel alarm is triggered, and the second fuel threshold is lower than the first fuel threshold. Exemplarily, the first fuel threshold is a value within the range of 10%-20% of the total fuel tank capacity, and the first fuel threshold is a value within the range of 5%-10% of the total fuel tank capacity.

[0054] In some embodiments, the vehicle controller 140 is further configured to: after receiving the first-level fuel alarm from the engine controller 180, increase the alarm level; if receiving the first-level fuel alarm from the engine controller 180, increase the alarm level. Thus, for different fuel alarms, different second reminder messages are fed back to the user terminal to enable the user to understand the urgency of refueling.

[0055] In some embodiments, the battery controller 130 is further configured to: after the core temperature of the power battery meets the target temperature, that is, after the core temperature of the power battery is adjusted to the target temperature, send a request to end heat preservation to the vehicle controller 140; the vehicle controller 140 is further configured to: in response to the request to end heat preservation from the battery controller 130, send a shutdown control command to the thermal management controller 170; the thermal management controller 170 is further configured to: if receiving the shutdown control command from the vehicle controller 140, control the in-vehicle air conditioner 160 to shut down. In this way, after the core temperature of the power battery reaches the target temperature required for vehicle start, the in-vehicle air conditioner 160 stops operating, reducing energy consumption.

[0056] In some embodiments, if the electric vehicle is a hybrid vehicle, the vehicle controller 140 is further configured to: in response to the request to end heat preservation from the battery controller 130, send a stop charging command to the engine controller 180; the engine controller 180 is further configured to: in response to the stop charging command from the vehicle controller 140, control the engine to stop operating to end the charging of the power battery. In this way, after the core temperature of the power battery reaches the target temperature required for vehicle start and driving, the engine stops charging the power battery, reducing fuel consumption.

[0057] In some embodiments, the vehicle controller 140 is further configured to: in response to a function shutdown instruction, shut down the heat preservation control function of the electric vehicle, so that even when the core temperature of the power battery is within the set temperature range, the battery controller 130 does not send a temperature maintenance request to the vehicle controller 140 or the vehicle controller 140 does not respond to the temperature maintenance request initiated by the battery controller 130. It can be understood that the function shutdown instruction can be from a user terminal, generated by the user's operation on the user terminal, or generated according to the user's operation on the electric vehicle, or generated when the duration of the remaining power being lower than or equal to the second safety power reaches a preset duration.

[0058] According to the above embodiments, it is convenient for the user to remotely shut down the heat preservation control function through the user terminal when the electric vehicle needs to be parked for a long time, or directly shut down the heat preservation control function on the electric vehicle. In the scenario where the vehicle needs to be parked for a long time, even if the core temperature of the power battery exceeds the working temperature range, the in-vehicle air conditioner 160 will not be triggered to adjust the temperature of the power battery. Thus, unnecessary energy waste is reduced.

[0059] According to the above embodiments, when the remaining power of the power battery is lower than or equal to the second safety power, shutting down the heat preservation control function of the electric vehicle can automatically shut down the heat preservation control function when the parking time is long and the power is low, reducing energy waste.

[0060] In some embodiments, the vehicle controller 140 is further configured to: after turning off the thermal management control function of the electric vehicle, in response to a function activation instruction, activate the thermal management control function of the electric vehicle, so that when the core temperature of the power battery is within the set temperature range, resume sending a temperature maintenance request and the remaining power to the vehicle controller 140, or the vehicle controller 140 resumes responding to the temperature maintenance request. It can be understood that the function activation instruction can be from a user terminal and generated by the user's operation on the user terminal, or generated according to the user's operation on the electric vehicle, or generated when the electric vehicle is charged so that the remaining power is higher than the first safety power.

[0061] According to the above-mentioned embodiments, it is convenient for the user to remotely activate the thermal management control function through the user terminal after the electric vehicle has been parked for a long time and before using the electric vehicle again, and the core temperature of the power battery can be adjusted to the target temperature in advance in the case of extremely bad weather for the electric vehicle. According to the above-mentioned embodiments, when the user activates the thermal management control function by operating on the electric vehicle, the process of adjusting the core temperature of the power battery to the target temperature only before using the electric vehicle again after it has been parked in extremely bad weather for a long time reduces energy waste.

[0062] In some embodiments, the vehicle controller 140 is further configured to: adjust the first target temperature and the second target temperature according to the remaining power of the power battery.

[0063] In some embodiments, since the in-vehicle air conditioner 160 stops operating after the core temperature of the power battery is adjusted to the target temperature each time, the core temperature of the power battery will exceed its operating temperature range under the influence of the ambient temperature. Therefore, during the parking process of the electric vehicle, there will be multiple rounds of adjusting the core temperature of the power battery to the target temperature. In some embodiments, the temperature values of the target temperature can be different when the core temperature is adjusted to the target temperature at different times.

[0064] In some embodiments, the first target temperature and the second target temperature may not be distinguished, and the required temperature adjustment amount for the current time is determined according to the remaining power of the power battery. According to the required temperature adjustment amount for the current time and the upper limit temperature value and the lower limit temperature value of the operating temperature range of the power battery, the target temperature for adjusting the temperature of the electric battery for the current time is determined. The more the remaining power, the greater the temperature adjustment amount for the current time. A corresponding relationship between the preset power and the preset adjustment amount can be established in advance, and the required temperature adjustment amount for the current time is determined according to this corresponding relationship. If the temperature of the power battery is heated for the current time, the sum of the required temperature adjustment amount for the current time and the lower threshold of the operating temperature range is used as the target temperature. If the temperature of the power battery is cooled for the current time, the difference between the upper threshold of the operating temperature range and the required temperature adjustment amount for the current time is used as the target temperature.

[0065] In some other embodiments, the vehicle controller 140 is further configured to: obtain a temperature set value input by a user, and adjust a first target temperature and a second target temperature according to the temperature set value.

[0066] Based on the same inventive concept, an embodiment of the present invention provides a method for controlling the thermal insulation of a power battery of an electric vehicle. Figure 3 The flowchart of the method for controlling the thermal insulation of the power battery of the electric vehicle in some embodiments of the present invention is shown. As Figure 3 shown, the method includes the following steps S101 - S103:

[0067] S101: When the electric vehicle is in a parked state, obtain the cell temperature and the remaining power of the power battery;

[0068] S102: Determine whether the cell temperature is within a set temperature range;

[0069] S103: If the cell temperature is within the set temperature range, control the on - vehicle air conditioner and the on - vehicle networking module of the electric vehicle to work, so as to adjust the cell temperature of the power battery to a target temperature, and the target temperature is within the operating temperature range of the power battery.

[0070] Based on the same inventive concept, an embodiment of the present invention provides an electronic device. Figure 4 The schematic structural diagram of the electronic device in some embodiments of the present invention is shown. As Figure 4 shown, the electronic device includes: a processor 402 and a memory 404. The memory 404 is coupled to the processor 402, and a computer program stored on the memory 404 and executable on the processor 402. When the processor 402 executes the program, it implements the above - mentioned method for controlling the thermal insulation of the power battery of the electric vehicle. For the sake of simplicity of the specification, it will not be elaborated here.

[0071] Among them, in Figure 4Among them, a bus architecture (represented by bus 400), bus 400 may include any number of interconnected buses and bridges. Bus 400 links together various circuits including one or more processors represented by processor 402 and a memory represented by memory 304. Bus 400 may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus will not be further described herein. Bus interface 405 provides an interface between bus 400 and receiver 401 and transmitter 403. Receiver 401 and transmitter 403 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 404 may be used to store data used by processor 402 when performing operations.

[0072] Based on the same inventive concept, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the above-mentioned power battery heat preservation control method for an electric vehicle.

[0073] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A power battery thermal insulation control system for an electric vehicle, characterized in that, The power battery thermal management control system includes: a temperature detection device, a power detection device, a battery controller, a vehicle controller, an in-vehicle networking module, and a thermal management controller for connecting to an in-vehicle air conditioner; The temperature detection device is used to obtain the cell temperature of the power battery; The power detection device is used to obtain the remaining power of the power battery; The battery controller is connected to the temperature detection device and the power detection device. The battery controller is configured to: when the electric vehicle is in a parked state, receive the cell temperature from the temperature detection device and the remaining power from the power detection device, determine whether the cell temperature is within a set temperature range, and if so, send a temperature maintenance request and the remaining power to the vehicle controller; The vehicle controller is connected to the battery controller and is configured to, in response to the temperature maintenance request, control the thermal management controller and the in-vehicle networking module according to the remaining power, so that the thermal management controller controls the in-vehicle air conditioner to operate and adjusts the cell temperature of the power battery to a target temperature, and the target temperature is within the operating temperature range of the power battery.

2. The power battery thermal management control system according to claim 1, wherein The vehicle controller is configured to: When the remaining power is higher than a first safety power, send a first control command to the thermal management controller; When the remaining power is lower than or equal to the first safety power and higher than a second safety power, send a second control command to the thermal management controller and control the in-vehicle networking module to send the status information of the power battery and the in-vehicle air conditioner to the user terminal, and the status information includes the remaining power; When the remaining power is lower than or equal to the second safety power, control the in-vehicle networking module to send a first reminder message and the status information of the power battery and the in-vehicle air conditioner to the user terminal, and the first reminder message is used to remind the user to charge or rescue the electric vehicle; The thermal management controller is configured to: If the first control command is received, control the in-vehicle air conditioner to adjust the cell temperature of the power battery to a first target temperature; If the second control command is received, control the in-vehicle air conditioner to adjust the cell temperature of the power battery to a second target temperature, and adjusting the cell temperature of the power battery to the second target temperature consumes less power of the power battery than adjusting it to the first target temperature.

3. The power battery thermal insulation control system according to claim 2, characterized in that, The electric vehicle is a hybrid vehicle, and the thermal management control system further includes an oil quantity detection device and an engine controller, and the oil quantity detection device, the vehicle controller are connected to the engine controller; The oil quantity detection device is used to: obtain the remaining oil quantity of the hybrid vehicle; The vehicle controller is further configured to: when the remaining power is lower than or equal to a third safety power, send a target control command to the engine controller, and the third safety power is less than or equal to the first safety power and greater than or equal to the second safety power; The engine controller is configured to: in response to the target control command, detect whether the remaining fuel quantity is greater than or equal to a first fuel quantity threshold, and if so, control the engine to charge the power battery.

4. The power battery thermal management control system according to claim 3, wherein the engine controller is further configured to: in response to the target control command, detect whether the remaining fuel quantity triggers a fuel quantity alarm; if it is detected that the remaining fuel quantity triggers a first-level fuel quantity alarm, control the engine to charge the power battery and feedback the first-level fuel quantity alarm to the vehicle controller; if it is detected that the remaining fuel quantity triggers a second-level fuel quantity alarm, prohibit the engine from charging the power battery and feedback the second-level fuel quantity alarm to the vehicle controller; the vehicle controller is further configured to: if receiving the first-level fuel quantity alarm, control the vehicle-mounted networking module to send a second reminder message to the user terminal; if receiving the second-level fuel quantity alarm, issue a prohibition command to the battery controller and the thermal management controller, and control the vehicle-mounted networking module to send a second reminder message to the user terminal; the battery controller, in response to the prohibition command, prohibits the power battery from supplying power to the vehicle-mounted air conditioner, and the thermal management controller, in response to the prohibition command, prohibits the vehicle-mounted air conditioner from operating; wherein the second reminder message is used to remind the user to refuel the hybrid electric vehicle, the remaining fuel quantity lower than the first fuel quantity threshold triggers the first-level fuel quantity alarm, the remaining fuel quantity lower than the second fuel quantity threshold triggers the second-level fuel quantity alarm, and the second fuel quantity threshold is lower than the first fuel quantity threshold.

5. The power battery thermal management control system according to any one of claims 2-4, wherein the battery controller is further configured to: after the core temperature of the power battery meets the target temperature, send a thermal management end request to the vehicle controller; the vehicle controller is further configured to: in response to the thermal management end request, send a shutdown control command to the thermal management controller; the thermal management controller is further configured to: if receiving the shutdown control command, control the vehicle-mounted air conditioner to shut down.

6. The power battery thermal insulation control system according to any one of claims 2-4, characterized in that The vehicle controller is further configured to: in response to a function shutdown instruction, shut down the thermal management control function of the electric vehicle. When the thermal management control function of the electric vehicle is in a shutdown state, if the core temperature is within the set temperature range, the battery controller does not send a temperature maintenance request to the vehicle controller or the vehicle controller does not respond to the temperature maintenance request initiated by the battery controller; wherein the function shutdown instruction is from the user terminal and is generated by the user's operation on the user terminal, or is generated according to the user's operation on the electric vehicle, or is generated when the duration of the remaining battery power being lower than or equal to the second safety battery power reaches a preset duration, or when the parking duration of the electric vehicle reaches a preset duration.

7. The power battery thermal insulation control system according to claim 6, characterized in that, The vehicle controller is further configured to: After turning off the thermal management control function of the electric vehicle, in response to a function activation command, activate the thermal management control function of the electric vehicle, so that when the cell temperature is within a set temperature range, the battery controller sends a temperature maintenance request and the remaining battery charge to the vehicle controller. Wherein, the function activation command is from a user terminal, generated by a user's operation on the user terminal, or generated according to a user's operation on the electric vehicle, or generated when charging the electric vehicle so that the remaining battery charge is higher than the first safety charge.

8. The power battery thermal insulation control system according to any one of claims 2-4, characterized in that, The vehicle controller is further configured to: Adjust the first target temperature and the second target temperature according to the remaining battery charge, and / or; Obtain a temperature set value input by the user, and adjust the first target temperature and the second target temperature according to the temperature set value.

9. A method for controlling the thermal insulation of a power battery of an electric vehicle, characterized in that, Comprising: When the electric vehicle is in a parked state, obtain the cell temperature and the remaining battery charge of the power battery; Determine whether the cell temperature is within a set temperature range; If the cell temperature is within the set temperature range, control the on-vehicle air conditioner and the on-vehicle networking module of the electric vehicle to operate according to the remaining battery charge, so as to adjust the cell temperature of the power battery to a target temperature, and the target temperature is within the operating temperature range of the power battery.

10. An electronic device, characterized in that, Comprising a processor and a memory, the memory is coupled to the processor, and the memory stores instructions that, when executed by the processor, implement the method for controlling the thermal management of the power battery of the electric vehicle according to any one of claims 1-8.

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