Heat management control system and control method of new energy automobile

Abstract

The invention discloses a heat management control system and method for a new energy automobile, and belongs to the technical field of new energy automobiles, and the method comprises the steps: inputting a heating request instruction to a vehicle control unit through a vehicle-mounted communication module (T-BOX) or an instrument module if the automobile is in a parking state, the heat management controller feeds back information about whether the battery needs to be heated or not to the vehicle control unit, the vehicle control unit judges whether the vehicle meets the first condition, the second condition and the third condition at the same time or not, and if yes, the motor controller (MCU) controls the motor to enter the locked-rotor state. And if the vehicle is in the running state, a motor controller (MCU) judges whether the electric power of a motor can only meet the driving requirement or not, if not, the whole vehicle controller judges whether the vehicle meets a fourth condition and a fifth condition at the same time or not, and if yes, heat generated by a low-power working point of the motor is used for supplying heat to an air conditioning system and a battery. According to the invention, heat can be provided for the air conditioning system and the battery of the new energy automobile through cooperation of the motor and the PTC.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and in particular, relates to a heat management control system and a control method for a new energy vehicle. Background Art

[0002] With the development of the automobile industry, new energy vehicles have been vigorously developed. At present, private cars are widely used in ordinary families, and electric vehicles are gradually becoming popular. At present, most electric vehicles use PTC heating technology, which heats the water circuit of the battery through PTC heating, and then heats the battery.

[0003] Patent CN108172938B discloses a power battery thermal management system, including: a signal detection module, a central control module and an execution module. The central control module is used to receive the detection signal sent by the signal detection module, and generate an execution instruction according to the detection signal, and send the execution instruction to the execution module to control the working state of the execution module; the execution module includes at least one set of thermoelectric cooling components.

[0004] However, the technology disclosed in the above patent cannot provide heat to the air-conditioning system and battery of the new energy vehicle through the coordination of the motor and PTC. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a heat management control system and control method for a new energy vehicle in view of the deficiencies in the prior art, so as to achieve the purpose of providing heat to the air conditioning system and battery of the new energy vehicle through the coordination of the motor and PTC.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a heat management control system for a new energy vehicle, comprising an on-board communication module (T-BOX), an instrument module, a heat management controller, a motor controller (MCU), and a whole vehicle controller, wherein the on-board communication module (T-BOX) is connected to the whole vehicle controller; the instrument module is connected to the whole vehicle controller; the heat management controller is connected to the whole vehicle controller; and the motor controller (MCU) is connected to the whole vehicle controller.

[0008] Furthermore, the vehicle controller determines whether the vehicle is in a parking state or a driving state.

[0009] Furthermore, when the vehicle controller determines that the vehicle is in a parking state, a heating request instruction is input to the vehicle controller through the on-board communication module (T-BOX) or the instrument module; the thermal management controller feeds back information on whether the battery needs heating to the vehicle controller.

[0010] Furthermore, the vehicle controller determines whether the vehicle satisfies the first condition, the second condition and the third condition at the same time; when the vehicle controller determines that the vehicle satisfies the first condition, the second condition and the third condition at the same time, the motor controller (MCU) controls the motor to enter a stalled state.

[0011] Furthermore, the first condition is that the vehicle is not ready; the second condition is that the vehicle gear is in the parking gear; and the third condition is that the vehicle is connected to the high voltage and the high voltage has no faults.

[0012] Furthermore, when the vehicle controller determines that the vehicle is in driving state, the motor controller (MCU) determines whether the motor power can only meet the driving requirements. If the motor controller (MCU) determines that the motor power cannot only meet the driving requirements, the vehicle controller determines whether the vehicle satisfies the fourth condition and the fifth condition at the same time.

[0013] Furthermore, when the vehicle controller determines that the vehicle satisfies both the fourth condition and the fifth condition, the heat generated by the low-power operating point of the motor is used to heat the air-conditioning system and the battery.

[0014] Furthermore, the fourth condition is that the vehicle is ready; the fifth condition is that the rotation speed of the motor is not less than a preset rotation speed.

[0015] Furthermore, the preset rotation speed is 50 revolutions per minute.

[0016] The present invention also provides a heat management control method for a new energy vehicle, the method comprising the following steps:

[0017] S1: The vehicle controller determines the vehicle state. If the vehicle controller determines that the vehicle is in the parking state, it enters S2. If the vehicle controller determines that the vehicle is in the driving state, it enters S6.

[0018] S2: Input a heating request command to the vehicle controller through the vehicle communication module (T-BOX) or the instrument module;

[0019] S3: The thermal management controller feeds back information on whether the battery needs to be heated to the vehicle controller;

[0020] S4: The vehicle controller determines whether the vehicle satisfies the first condition, the second condition and the third condition at the same time; if so, it proceeds to S5, if not, it proceeds to S9;

[0021] S5: The motor controller (MCU) controls the motor to enter a stalled state; enter S9;

[0022] S6: The motor controller (MCU) determines whether the motor power can only meet the driving requirements. If not, it goes to S7. If yes, it goes to S9.

[0023] S7: The vehicle controller determines whether the vehicle satisfies both the fourth condition and the fifth condition. If so, the process proceeds to S8; if not, the process proceeds to S9;

[0024] S8: The heat generated by the motor's low-power operating point is used to heat the air conditioning system and the battery;

[0025] S9: End.

[0026] The heat management control system and control method of the present invention have the following advantages:

[0027] (1) Through the heat management control system and control method of the present invention, the motor and PTC can be used to provide heat for the air conditioning system and battery of the new energy vehicle.

[0028] (2) The heat management control system and control method of the present invention can reduce the power of PTC or reduce the utilization of PTC, thereby effectively reducing costs.

[0029] (3) The heat management control system and control method of the present invention can effectively improve heat energy conversion.

[0030] (4) The thermal management control system and control method of the present invention cover vehicle driving conditions to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] This specification includes the following drawings, which show the following contents:

[0032] Figure 1 It is a logical structure block diagram of a heat management control system for a new energy vehicle of the present invention;

[0033] Figure 2 It is a flow chart of a heat management control method for a new energy vehicle of the present invention.

[0034] Explanation of the accompanying drawings: 1. Vehicle communication module (T-BOX); 2. Instrument module; 3. Thermal management controller; 4. Motor controller (MCU); 5. Vehicle controller. DETAILED DESCRIPTION

[0035] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0036] Figure 1It is a logical structure block diagram of a thermal management control system of a new energy vehicle of the present invention, including an on-board communication module (T-BOX) 1, an instrument module 2, a thermal management controller 3, a motor controller (MCU) 4, and a vehicle controller 5. The on-board communication module (T-BOX) 1 is connected to the vehicle controller 5; the instrument module 2 is connected to the vehicle controller 5; the thermal management controller 3 is connected to the vehicle controller 5; and the motor controller (MCU) 4 is connected to the vehicle controller 5.

[0037] The vehicle controller 5 determines whether the vehicle is in a parking state or a driving state.

[0038] When the vehicle controller 5 determines that the vehicle is in the parking state, a heating request instruction is input to the vehicle controller 5 through the on-board communication module (T-BOX) 1 or the instrument module 2. At the same time, the thermal management controller 3 feeds back information on whether the battery needs heating to the vehicle controller 5. The vehicle controller 5 determines whether the vehicle satisfies the first condition, the second condition and the third condition at the same time. If the vehicle controller 5 determines that the vehicle satisfies the first condition, the second condition and the third condition at the same time, the motor controller (MCU) 4 controls the motor to enter a stalled state. Specifically, in the parking state, when the driver has a cabin heating demand or a battery heating demand, the driver can turn on the cabin heating or the battery heating through the terminal APP or the function menu in the instrument module 2. After turning on the cabin heating or the battery heating through the terminal APP or the function menu in the instrument module 2, the on-board communication module (T-BOX) 1 or the instrument module 2 inputs a request instruction for cabin heating or battery heating to the vehicle controller 5. If the vehicle controller 5 receives a cabin heating request instruction input by the on-board communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will determine whether the vehicle satisfies the first condition, the second condition and the third condition at the same time. If the vehicle controller 5 receives a battery heating request instruction input by the on-board communication module (T-BOX) 1 or the instrument module 2 If the vehicle controller 5 receives a request instruction for battery heating input from the vehicle communication module (T-BOX) 1 or the instrument module 2, and the information fed back by the thermal management controller 3 to the vehicle controller 5 is that the battery needs to be heated, the vehicle controller 5 will determine whether the vehicle satisfies the first condition, the second condition, and the third condition at the same time. If the vehicle controller 5 receives a request instruction for battery heating input from the vehicle communication module (T-BOX) 1 or the instrument module 2, and the information fed back by the thermal management controller 3 to the vehicle controller 5 is that the battery does not need to be heated, the vehicle controller 5 will not determine whether the vehicle satisfies the first condition, the second condition, and the third condition at the same time. If the vehicle controller 5 receives a request instruction for cabin heating and battery heating input from the vehicle communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will determine whether the vehicle satisfies the first condition, the second condition, and the third condition at the same time. When the vehicle controller 5 determines that the vehicle satisfies the first condition, the second condition, and the third condition at the same time, the vehicle controller 5 controls the motor controller (MCU) 4 to control the motor to enter a stalled state.Among them, if the vehicle controller 5 receives a request instruction for cabin heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, the air-conditioning system is provided with heat by stalling the motor, thereby realizing cabin heating. When the heat provided to the air-conditioning system by stalling the motor is insufficient, the PTC is controlled by the thermal management controller 3 to provide heat to the air-conditioning system, that is, the air-conditioning system of the new energy vehicle can be provided with heat through the motor and PTC in coordination. If the vehicle controller 5 receives a request instruction for battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery needs to be heated, the battery is provided with heat by stalling the motor, thereby realizing cabin heating. Battery heating can be achieved. When the heat provided by the motor stall is insufficient for the battery, the thermal management controller 3 controls the PTC to provide heat for the battery, that is, the motor and PTC can be used to provide heat for the battery of the new energy vehicle; if the vehicle controller 5 receives the cabin heating and battery heating request command input by the vehicle communication module (T-BOX) 1 or the instrument module 2, the motor stall is used to provide heat for the air conditioning system and the battery, and then the cabin heating and battery heating can be achieved. When the motor stall is insufficient for the heat provided by the air conditioning system and the battery, the thermal management controller 3 controls the PTC to provide heat for the air conditioning system and the battery, that is, the motor and PTC can be used to provide heat for the air conditioning system and the battery of the new energy vehicle. Thereby, the power of PTC can be reduced or the utilization of PTC can be reduced, the cost can be effectively reduced, and the heat energy conversion can be effectively improved. In addition, the heat management control system and control method of the present invention cover the vehicle driving conditions to the greatest extent.

[0039] Among them, the first condition is that the vehicle is not ready (vehicle is not Ready); the second condition is that the vehicle gear is in the parking gear; the third condition is that the vehicle is connected to high voltage and the high voltage has no fault.

[0040] When the vehicle controller 5 determines that the vehicle is in driving state, the motor controller (MCU) 4 determines whether the motor power can only meet the driving demand. If the motor controller (MCU) 4 determines that the motor power cannot only meet the driving demand, the vehicle controller 5 determines whether the vehicle satisfies the fourth condition and the fifth condition at the same time. When the vehicle controller 5 determines that the vehicle satisfies the fourth condition and the fifth condition at the same time, the heat generated by the low-power operating point of the motor is used to heat the air-conditioning system and the battery. Specifically, in the driving state, when the motor controller (MCU) 4 determines that the motor power is not only enough to meet the driving demand, when the vehicle controller 5 receives a request instruction for cabin heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the vehicle controller 5 determines that the vehicle satisfies the fourth and fifth conditions at the same time, the heat generated by the low-power operating point of the motor is used to heat the air-conditioning system, thereby achieving cabin heating. When the heat generated by the low-power operating point of the motor is insufficient to heat the air-conditioning system, the thermal management controller 3 controls the PTC to provide heat for the air-conditioning system, that is, the motor and PTC can cooperate to provide heat for the air-conditioning system of the new energy vehicle; when the vehicle controller 5 receives a request instruction for battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery needs to be heated, and the vehicle controller 5 determines that the vehicle satisfies the fourth condition at the same time. If the conditions and the fifth condition are met, the heat generated by the low power working point of the motor is used to heat the battery, thereby realizing battery heating. When the heat generated by the low power working point of the motor is insufficient to heat the air conditioning system, the thermal management controller 3 controls the PTC to provide heat to the battery, that is, the motor and PTC can be used to provide heat to the battery of the new energy vehicle in a coordinated manner. When the vehicle controller 5 receives the cabin heating and battery heating request command input by the vehicle communication module (T-BOX) 1 or the instrument module 2, and the vehicle controller 5 determines that the vehicle satisfies the fourth and fifth conditions at the same time, the heat generated by the low power working point of the motor is used to heat the air conditioning system and the battery, thereby realizing cabin heating and battery heating. When the heat generated by the low power working point of the motor is insufficient to heat the air conditioning system, the thermal management controller 3 controls the PTC to provide heat to the air conditioning system and the battery, that is, the motor and PTC can be used to provide heat to the air conditioning system and the battery of the new energy vehicle in a coordinated manner. Thus, the power of PTC can be reduced or the utilization of PTC can be reduced, the cost can be effectively reduced, and the heat energy conversion can be effectively improved. In addition, the thermal management control system and control method of the present invention cover vehicle driving conditions to the greatest extent.

[0041] The fourth condition is that the vehicle is ready (vehicle Ready); the fifth condition is that the motor speed is not less than a preset speed, wherein the preset speed is 50 revolutions per minute.

[0042] Figure 2 It is a flow chart of a heat management control method for a new energy vehicle of the present invention, and the method comprises the following steps:

[0043] S1: The vehicle controller 5 determines the vehicle state. If the vehicle controller 5 determines that the vehicle is in the parking state, it enters S2. If the vehicle controller 5 determines that the vehicle is in the driving state, it enters S6. Figure 2 Specifically, the vehicle controller 5 first determines whether the vehicle is in a parking state or a driving state. If the vehicle controller 5 determines that the vehicle is in a parking state, the process enters S2. If the vehicle controller 5 determines that the vehicle is in a driving state, the process enters S6.

[0044] S2: Input the heating request command to the vehicle controller 5 through the vehicle communication module (T-BOX) 1 or the instrument module 2; Figure 2 S2 in. Specifically, in the parking state, when the driver has a cabin heating demand or a battery heating demand, the driver can remotely control the cabin heating or the battery heating through the terminal APP. After the driver remotely controls the cabin heating or the battery heating through the terminal APP, the vehicle communication module (T-BOX) 1 will input the cabin heating or the battery heating request instruction to the vehicle controller 5; the driver can also turn on the cabin heating or the battery heating through the function menu in the instrument module 2. After the driver turns on the cabin heating or the battery heating through the function menu in the instrument module 2, the instrument module 2 will input the cabin heating or the battery heating request instruction to the vehicle controller 5.

[0045] Among them, the function menus in the above-mentioned terminal APP and the instrument module 2 are both provided with cabin heating and battery heating functions.

[0046] In addition, in the above process, if the driver only turns on the cabin heating, the on-board communication module (T-BOX) 1 or the instrument module 2 inputs the request instruction for cabin heating to the vehicle controller 5; if the driver only turns on the battery heating, the on-board communication module (T-BOX) 1 or the instrument module 2 inputs the request instruction for battery heating to the vehicle controller 5; if the driver turns on both the cabin heating and the battery heating, the on-board communication module (T-BOX) 1 or the instrument module 2 inputs the request instruction for cabin heating and the battery heating to the vehicle controller 5.

[0047] S3: The thermal management controller 3 feeds back information on whether the battery needs to be heated to the vehicle controller 5; Figure 2S3 in. Specifically, if the vehicle controller 5 receives a cabin heating request command input from the vehicle communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will not control the thermal management controller 3 to feedback information on whether the battery needs heating to the vehicle controller 5; if the vehicle controller 5 receives a battery heating request command input from the vehicle communication module (T-BOX) 1 or the instrument module 2 to the vehicle controller 5, the vehicle controller 5 will control the thermal management controller 3 to feedback information on whether the battery needs heating to the vehicle controller 5; if the vehicle controller 5 receives a cabin heating and battery heating request command input from the vehicle communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will control the thermal management controller 3 to feedback information on whether the battery needs heating to the vehicle controller 5.

[0048] S4: The vehicle controller 5 determines whether the vehicle satisfies the first condition, the second condition and the third condition at the same time; if so, it proceeds to S5, if not, it proceeds to S9; that is, corresponding Figure 2 Specifically, if the vehicle controller 5 receives a cabin heating request command input from the vehicle communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will determine whether the vehicle satisfies the first condition, the second condition and the third condition at the same time. If so, it will enter S5, if not, it will enter S9; if the vehicle controller 5 receives a battery heating request command input from the vehicle communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery needs to be heated, the vehicle controller 5 will determine whether the vehicle satisfies the first condition, the second condition and the third condition at the same time. If so, it will enter S5, if not, it will enter Enter S9; if the vehicle controller 5 receives a request instruction for battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery does not need to be heated, the vehicle controller 5 will not determine whether the vehicle satisfies the first condition, the second condition and the third condition at the same time, and enter S9; if the vehicle controller 5 receives a request instruction for cabin heating and battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will determine whether the vehicle satisfies the first condition, the second condition and the third condition at the same time, and if so, enter S5, if not, enter S9.

[0049] Among them, the first condition is that the vehicle is not ready (vehicle is not Ready); the second condition is that the vehicle gear is in the parking gear; the third condition is that the vehicle is connected to high voltage and the high voltage has no fault.

[0050] S5: Motor controller (MCU) 4 controls the motor to enter the stall state; enter S9; corresponding Figure 2Specifically, when the vehicle controller 5 determines in S4 that the vehicle satisfies the first condition, the second condition and the third condition at the same time, the vehicle controller 5 controls the motor controller (MCU) 4 to control the motor to enter the stalled state.

[0051] Among them, if the vehicle controller 5 receives a request instruction for cabin heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, the air-conditioning system is provided with heat by stalling the motor, thereby realizing cabin heating. When the heat provided to the air-conditioning system by stalling the motor is insufficient, the PTC is controlled by the thermal management controller 3 to provide heat to the air-conditioning system, that is, the air-conditioning system of the new energy vehicle can be provided with heat through the motor and PTC in coordination. If the vehicle controller 5 receives a request instruction for battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery needs to be heated, the battery is provided with heat by stalling the motor, thereby realizing cabin heating. Battery heating can be achieved. When the heat provided by the motor stall is insufficient for the battery, the thermal management controller 3 controls the PTC to provide heat for the battery, that is, the motor and PTC can be used to provide heat for the battery of the new energy vehicle; if the vehicle controller 5 receives the cabin heating and battery heating request command input by the vehicle communication module (T-BOX) 1 or the instrument module 2, the motor stall is used to provide heat for the air conditioning system and the battery, and then the cabin heating and battery heating can be achieved. When the motor stall is insufficient for the heat provided by the air conditioning system and the battery, the thermal management controller 3 controls the PTC to provide heat for the air conditioning system and the battery, that is, the motor and PTC can be used to provide heat for the air conditioning system and the battery of the new energy vehicle. Thereby, the power of PTC can be reduced or the utilization of PTC can be reduced, the cost can be effectively reduced, and the heat energy conversion can be effectively improved. In addition, the heat management control system and control method of the present invention cover the vehicle driving conditions to the greatest extent.

[0052] In addition, when the motor is stalled to provide heat for the air conditioning system or the battery, if the vehicle controller 5 determines that at least one of the first condition, the second condition and the third condition is not met, the motor controller 3 controls the motor to exit the stalled state.

[0053] S6: The motor controller (MCU) 4 determines whether the motor power can only meet the driving requirements. If not, it enters S7. If yes, it enters S9. Figure 2S6 in the vehicle. Specifically, in the driving state, when the driver has a cabin heating demand or a battery heating demand, the driver can turn on the cabin heating or the battery heating through the terminal APP control. When the driver turns on the cabin heating or the battery heating through the terminal APP control, the vehicle communication module (T-BOX) 1 will input the cabin heating or the battery heating request instruction to the vehicle controller 5; the driver can also turn on the cabin heating or the battery heating through the function menu in the instrument module 2. When the driver turns on the cabin heating or the battery heating through the function menu in the instrument module 2, the instrument module 2 will input the cabin heating or the battery heating request instruction to the vehicle controller 5. After turning on the cabin heating or the battery heating through the terminal APP or the function menu in the instrument module 2, the motor controller (MCU) 4 will determine whether the motor power can only meet the driving demand. If not, it will enter S7, and if so, it will enter S9.

[0054] Among them, the function menus in the above-mentioned terminal APP and the instrument module 2 are both provided with cabin heating and battery heating functions.

[0055] In addition, in the above process, if the driver only turns on the cabin heating, the on-board communication module (T-BOX) 1 or the instrument module 2 inputs the request instruction for cabin heating to the vehicle controller 5; if the driver only turns on the battery heating, the on-board communication module (T-BOX) 1 or the instrument module 2 inputs the request instruction for battery heating to the vehicle controller 5; if the driver turns on both the cabin heating and the battery heating, the on-board communication module (T-BOX) 1 or the instrument module 2 inputs the request instruction for cabin heating and the battery heating to the vehicle controller 5.

[0056] S7: The vehicle controller 5 determines whether the vehicle satisfies the fourth condition and the fifth condition at the same time. If so, it proceeds to S8; if not, it proceeds to S9; that is, corresponding to Figure 2Specifically, when the motor controller (MCU) 4 determines that the motor power is not only sufficient to meet the driving demand, if the vehicle controller 5 receives a cabin heating request command input by the vehicle communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will determine whether the vehicle satisfies both the fourth and fifth conditions. If so, it proceeds to S8, and if not, it proceeds to S9; if the vehicle controller 5 receives a battery heating request command input by the vehicle communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery needs to be heated, the vehicle controller 5 will determine whether the vehicle satisfies both the fourth and fifth conditions. Condition, if yes, enter S8, if not, enter S9; if the vehicle controller 5 receives a request instruction for battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery does not need to be heated, the vehicle controller 5 will not determine whether the vehicle satisfies the fourth and fifth conditions at the same time, and enter S9; if the vehicle controller 5 receives a request instruction for cabin heating and battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, the vehicle controller 5 will determine whether the vehicle satisfies the fourth and fifth conditions at the same time, if yes, enter S8, if not, enter S9.

[0057] The fourth condition is that the vehicle is ready (vehicle Ready); the fifth condition is that the motor speed is not less than a preset speed, wherein the preset speed is 50 revolutions per minute.

[0058] S8: The heat generated by the low-power operating point of the motor is used to heat the air conditioning system and the battery; Figure 2S8 in. Specifically, when the vehicle controller 5 receives a cabin heating request command input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the vehicle controller 5 determines that the vehicle satisfies both the fourth and fifth conditions, the heat generated by the low-power operating point of the motor is used to heat the air-conditioning system, thereby achieving cabin heating. When the heat generated by the low-power operating point of the motor is insufficient to heat the air-conditioning system, the thermal management controller 3 controls the PTC to provide heat for the air-conditioning system, that is, the motor and PTC can collaboratively provide heat for the air-conditioning system of the new energy vehicle; when the vehicle controller 5 receives a battery heating request command input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back by the thermal management controller 3 to the vehicle controller 5 is that the battery needs to be heated, and the vehicle controller 5 determines that the vehicle satisfies both the fourth and fifth conditions, the low-power operating point of the motor is used to heat the air-conditioning system. The heat generated is used to heat the battery, and then the battery heating can be realized. When the heat generated by the low power working point of the motor is insufficient for the air conditioning system to heat, the PTC is controlled by the thermal management controller 3 to provide heat for the battery, that is, the motor and PTC can be used to provide heat for the battery of the new energy vehicle in a coordinated manner; when the vehicle controller 5 receives the cabin heating and battery heating request instructions input by the vehicle communication module (T-BOX) 1 or the instrument module 2, and the vehicle controller 5 determines that the vehicle satisfies the fourth condition and the fifth condition at the same time, the heat generated by the low power working point of the motor is used to heat the air conditioning system and the battery, and then the cabin heating and battery heating can be realized. When the heat generated by the low power working point of the motor is insufficient for the air conditioning system to heat, the PTC is controlled by the thermal management controller 3 to provide heat for the air conditioning system and the battery, that is, the motor and PTC can be used to provide heat for the air conditioning system and the battery of the new energy vehicle in a coordinated manner. Thereby, the power of PTC can be reduced or the utilization of PTC can be reduced, the cost can be effectively reduced, and the heat energy conversion can be effectively improved. In addition, the heat management control system and control method of the present invention cover the vehicle driving conditions to the greatest extent.

[0059] Among them, when the heat generated by the low-power operating point of the motor is used to heat the air-conditioning system or the battery, if the vehicle controller 5 determines that at least one of the fourth condition and the fifth condition is not met, the heat generated by the low-power operating point of the motor is stopped from being used to heat the air-conditioning system or the battery.

[0060] S9: End; corresponding Figure 2 S9 in.

[0061] Functions and Effects of the Embodiments

[0062] In the parking state, if the vehicle controller 5 receives a request instruction for cabin heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, the air-conditioning system is provided with heat by stalling the motor, thereby realizing cabin heating. When the heat provided to the air-conditioning system by stalling the motor is insufficient, the PTC is controlled by the thermal management controller 3 to provide heat to the air-conditioning system, that is, the air-conditioning system of the new energy vehicle can be provided with heat by the motor and PTC in coordination. If the vehicle controller 5 receives a request instruction for battery heating input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery needs to be heated, the battery is provided with heat by stalling the motor, thereby realizing cabin heating. Battery heating can be achieved. When the heat provided by the motor stall is insufficient for the battery, the thermal management controller 3 controls the PTC to provide heat for the battery, that is, the motor and PTC can be used to provide heat for the battery of the new energy vehicle; if the vehicle controller 5 receives the cabin heating and battery heating request command input by the vehicle communication module (T-BOX) 1 or the instrument module 2, the motor stall is used to provide heat for the air conditioning system and the battery, and then the cabin heating and battery heating can be achieved. When the motor stall is insufficient for the heat provided by the air conditioning system and the battery, the thermal management controller 3 controls the PTC to provide heat for the air conditioning system and the battery, that is, the motor and PTC can be used to provide heat for the air conditioning system and the battery of the new energy vehicle. Thereby, the power of PTC can be reduced or the utilization of PTC can be reduced, the cost can be effectively reduced, and the heat energy conversion can be effectively improved. In addition, the heat management control system and control method of the present invention cover the vehicle driving conditions to the greatest extent.

[0063] In the driving state, when the vehicle controller 5 receives a cabin heating request instruction input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the vehicle controller 5 determines that the vehicle satisfies the fourth and fifth conditions at the same time, the heat generated by the low-power operating point of the motor is used to heat the air-conditioning system, thereby achieving cabin heating. When the heat generated by the low-power operating point of the motor is insufficient to heat the air-conditioning system, the thermal management controller 3 controls the PTC to provide heat for the air-conditioning system, that is, the motor and PTC can cooperate to provide heat for the air-conditioning system of the new energy vehicle; when the vehicle controller 5 receives a battery heating request instruction input by the on-board communication module (T-BOX) 1 or the instrument module 2, and the information fed back to the vehicle controller 5 by the thermal management controller 3 is that the battery needs to be heated, and the vehicle controller 5 determines that the vehicle satisfies the fourth and fifth conditions at the same time, the low-power operating point of the motor is used to heat the air-conditioning system. The heat generated by the low power working point of the motor is used to heat the battery, and then the battery heating can be realized. When the heat generated by the low power working point of the motor is insufficient for the air conditioning system to heat, the thermal management controller 3 controls the PTC to provide heat for the battery, that is, the motor and PTC can be used to provide heat for the battery of the new energy vehicle in a coordinated manner; when the vehicle controller 5 receives the cabin heating and battery heating request instructions input by the vehicle communication module (T-BOX) 1 or the instrument module 2, and the vehicle controller 5 determines that the vehicle satisfies the fourth condition and the fifth condition at the same time, the heat generated by the low power working point of the motor is used to heat the air conditioning system and the battery, and then the cabin heating and battery heating can be realized. When the heat generated by the low power working point of the motor is insufficient for the air conditioning system to heat, the thermal management controller 3 controls the PTC to provide heat for the air conditioning system and the battery, that is, the motor and PTC can be used to provide heat for the air conditioning system and the battery of the new energy vehicle in a coordinated manner. Thereby, the power of PTC can be reduced or the utilization of PTC can be reduced, the cost can be effectively reduced, and the heat energy conversion can be effectively improved. In addition, the heat management control system and control method of the present invention cover the vehicle driving conditions to the greatest extent.

[0064] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A thermal management control system for a new energy vehicle, characterized in that: It includes a vehicle-mounted communication module (T-BOX), an instrument module, a thermal management controller, a motor controller (MCU), and a whole vehicle controller. The vehicle-mounted communication module (T-BOX) is connected to the whole vehicle controller; the instrument module is connected to the whole vehicle controller; the thermal management controller is connected to the whole vehicle controller; and the motor controller (MCU) is connected to the whole vehicle controller.

2. A thermal management control system for a new energy vehicle as claimed in claim 1, characterized in that: The vehicle controller determines whether the vehicle is in a parking state or a driving state.

3. A thermal management control system for a new energy vehicle as claimed in claim 2, characterized in that: When the vehicle controller determines that the vehicle is in a parking state, a heating request instruction is input to the vehicle controller through the vehicle-mounted communication module (T-BOX) or the instrument module; the thermal management controller feeds back information on whether the battery needs heating to the vehicle controller.

4. A thermal management control system for a new energy vehicle as claimed in claim 3, characterized in that: The vehicle controller determines whether the vehicle satisfies the first condition, the second condition and the third condition at the same time; when the vehicle controller determines that the vehicle satisfies the first condition, the second condition and the third condition at the same time, the motor controller (MCU) controls the motor to enter a stalled state.

5. A thermal management control system for a new energy vehicle as claimed in claim 4, characterized in that: The first condition is that the vehicle is not ready; the second condition is that the vehicle gear is in the parking gear; and the third condition is that the vehicle is connected to high voltage and the high voltage has no fault.

6. A thermal management control system for a new energy vehicle as claimed in claim 2, characterized in that: When the vehicle controller determines that the vehicle is in driving state, the motor controller (MCU) determines whether the motor power can only meet the driving requirements. If the motor controller (MCU) determines that the motor power cannot only meet the driving requirements, the vehicle controller determines whether the vehicle satisfies the fourth condition and the fifth condition at the same time.

7. A thermal management control system for a new energy vehicle as claimed in claim 6, characterized in that: When the vehicle controller determines that the vehicle satisfies the fourth condition and the fifth condition at the same time, the heat generated by the low-power operating point of the motor is used to heat the air-conditioning system and the battery.

8. A thermal management control system for a new energy vehicle as claimed in any one of claims 6 to 7, characterized in that: The fourth condition is that the vehicle is ready; the fifth condition is that the rotation speed of the motor is not less than a preset rotation speed.

9. A thermal management control system for a new energy vehicle as claimed in claim 8, characterized in that: The preset rotation speed is 50 revolutions per minute.

10. A heat management control method for a new energy vehicle according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1: The vehicle controller determines the vehicle state. If the vehicle controller determines that the vehicle is in the parking state, it enters S2. If the vehicle controller determines that the vehicle is in the driving state, it enters S6. S2: Input a heating request command to the vehicle controller through the vehicle communication module (T-BOX) or the instrument module; S3: The thermal management controller feeds back information to the vehicle controller as to whether the battery needs to be heated; S4: The vehicle controller determines whether the vehicle satisfies the first condition, the second condition and the third condition at the same time; if so, it proceeds to S5, if not, it proceeds to S9; S5: The motor controller (MCU) controls the motor to enter a stalled state; enter S9; S6: The motor controller (MCU) determines whether the motor power can only meet the driving requirements. If not, it goes to S7. If yes, it goes to S9. S7: The vehicle controller determines whether the vehicle satisfies both the fourth condition and the fifth condition. If so, the process proceeds to S8; if not, the process proceeds to S9; S8: The heat generated by the motor's low-power operating point is used to heat the air conditioning system and the battery; S9: End.

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