Heating system, method, storage medium and vehicle for a traction battery

Abstract

The present disclosure relates to a heating system, method, storage medium and vehicle of a power battery, the system comprising: a power battery control module, a power battery, a power control module and a generator, the generator being connected with the power control module, the power battery being connected with the power battery control module, the power control module being connected with the power battery control module; the power battery control module collects battery temperature information of the power battery, and sends the battery temperature information to the power control module; the power control module is used for determining a target field weakening power of the generator according to the battery temperature information, and performing field weakening heating on the power battery according to the target field weakening power. Thus, the field weakening heating function of the generator is utilized to heat the power motor when the battery temperature information is lower than a temperature threshold, the field weakening heating of the generator does not affect the wheel end driving of the vehicle, the smoothness of the driving torque of the vehicle in the power battery heating process is ensured, and the cost of the battery heating system is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of power battery heating, specifically to a power battery heating system, method, storage medium, and vehicle. Background Technology

[0002] The main type of power battery for electric vehicles is the lithium battery. Due to the greater polarization of lithium-ion power batteries in low-temperature environments, their charge and discharge characteristics are poor. Therefore, when the battery temperature is low, it is necessary to heat the power battery to ensure normal charge and discharge. Current technology mainly couples the drive motor to the vehicle's wheel ends, using the drive motor's stall heating to heat the power battery. This heating method is limited by the coupling between the drive motor and the wheel ends, and cannot eliminate the influence of stall torque on the vehicle's wheel ends. Furthermore, the stall heating control of the drive motor is complex during vehicle operation, failing to guarantee the smoothness of the vehicle's driving torque, resulting in a poor driving experience for the driver. Secondly, existing heating methods mainly use PTC (Positive Temperature Coefficient) heaters to heat the battery coolant, transferring heat to the battery through the coolant. PTC heaters are affected by related wiring harnesses and installation space, making installation inconvenient and the cost of on-board PTC heaters high. Summary of the Invention

[0003] The purpose of this disclosure is to provide a heating system, method, storage medium, and vehicle for a power battery, in order to solve the technical problem in the related art where the heating process of the power battery cannot guarantee the smoothness of the vehicle's driving torque, resulting in a poor driving experience for the driver.

[0004] To achieve the above objectives, a first aspect of the present disclosure provides a heating system for a power battery, the system comprising: a power battery control module, a power battery, a power control module, and a generator, wherein the generator is connected to the power control module, the power battery is connected to the power battery control module, and the power control module is connected to the power battery.

[0005] The power battery control module is used to collect the battery temperature information of the power battery and send the battery temperature information to the power control module.

[0006] The power control module is used to determine the target magnetic weakening power of the generator based on the battery temperature information, and to perform magnetic weakening heating on the power battery based on the target magnetic weakening power.

[0007] Optionally, the system further includes a cooling system connected to the generator and the power battery;

[0008] The generator is also used to perform magnetic weakening heating on the cooling system according to the target magnetic weakening power, so that the cooling system obtains the target heat.

[0009] The cooling system is used to heat the power battery according to the target heat.

[0010] Optionally, the system further includes: a first solenoid valve and a second solenoid valve, wherein the first solenoid valve is connected to the generator and the cooling system, and the second solenoid valve is connected to the power battery and the cooling system.

[0011] Optionally, the power control module includes a generator control module and a vehicle control module; the vehicle control module is connected to the generator control module and the power battery control module; the generator control module is used to determine the target magnetic weakening power of the generator based on the battery temperature information, and to perform magnetic weakening heating on the power battery based on the target magnetic weakening power; the vehicle control module is used to determine the target magnetic weakening power of the generator based on the battery temperature information when the battery temperature information is less than a temperature threshold, and to send the target magnetic weakening power to the generator control module.

[0012] Optionally, the system further includes an engine connected to the vehicle control module.

[0013] A second aspect of this disclosure provides a method for heating a power battery, comprising:

[0014] When the battery temperature information is lower than the temperature threshold, the target field weakening power of the generator is determined based on the battery temperature information;

[0015] The generator is controlled to perform magnetic weakening heating on the power battery according to the target magnetic weakening power.

[0016] Optionally, controlling the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power includes:

[0017] Control the power battery to connect to the cooling system corresponding to the generator;

[0018] The generator is controlled to perform magnetic weakening heating on the cooling system according to the target magnetic weakening power;

[0019] The cooling system is controlled to heat the power battery.

[0020] Optionally, controlling the power battery to connect to the cooling system corresponding to the generator includes:

[0021] Close the first solenoid valve between the generator and the cooling system, and open the second solenoid valve between the power battery and the cooling system;

[0022] Based on the first solenoid valve and the second solenoid valve, the power battery is controlled to connect to the cooling system.

[0023] Optionally, controlling the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power includes:

[0024] Obtain the motor speed of the generator;

[0025] When the motor speed is within the preset speed range, the generator is controlled to perform magnetic weakening heating on the power battery according to the target magnetic weakening power.

[0026] Optionally, determining the target field weakening power of the generator based on the battery temperature information includes:

[0027] Obtain the preset target temperature of the power battery;

[0028] Based on the battery temperature information and the preset target temperature, the target heat required by the power battery is determined;

[0029] The target magnetic weakening power of the generator is determined based on the target heat and the heat conversion rate, wherein the heat conversion rate is the energy conversion rate between the magnetic weakening power of the generator and the heat of the power battery.

[0030] Optionally, controlling the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power includes:

[0031] The magnetic weakening current of the generator is determined based on the target magnetic weakening power;

[0032] The generator is controlled to perform magnetic weakening heating based on the magnetic weakening current.

[0033] Optionally, determining the field weakening current of the generator based on the target field weakening power includes:

[0034] Based on the target field weakening power, determine the excitation current and torque current corresponding to the generator;

[0035] Based on the excitation current and the torque current, the field weakening current corresponding to the generator when the generator does not generate torque is determined.

[0036] A third aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the heating method for any of the power batteries described in the second aspect.

[0037] A fourth aspect of this disclosure provides a vehicle, including: a heating system for a power battery as described in the first aspect of this disclosure, or a non-transitory computer-readable storage medium as described in the third aspect of this disclosure.

[0038] The system, based on the above technical solution, includes: a power battery control module, a power battery, a power control module, and a generator. The generator is connected to the power control module, the power battery is connected to the power battery control module, and the power control module is connected to the power battery control module. The power battery control module collects battery temperature information and sends it to the power control module. The power control module determines the target magnetic weakening power of the generator based on the battery temperature information and performs magnetic weakening heating on the power battery according to the target magnetic weakening power. This utilizes the generator's magnetic weakening heating function to heat the power motor when the battery temperature is below a temperature threshold. The generator's magnetic weakening heating does not affect the vehicle's wheel-end drive, ensuring the smoothness of the vehicle's drive torque during power battery heating and reducing the cost of the battery heating system.

[0039] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0040] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0041] Figure 1 This is a schematic diagram of a heating system for a power battery according to an exemplary embodiment.

[0042] Figure 2 This is a flowchart illustrating a heating method for a power battery according to an exemplary embodiment.

[0043] Figure 3 This is a flowchart illustrating another method for heating a power battery according to an exemplary embodiment.

[0044] Figure 4 This is an example diagram illustrating a thermal management system for a hybrid vehicle according to an exemplary embodiment.

[0045] Figure 5 This is a flowchart illustrating yet another method for heating a power battery according to an exemplary embodiment.

[0046] Figure 6 This is a block diagram illustrating a vehicle according to an exemplary embodiment. Detailed Implementation

[0047] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0048] It is understood that the terms "first," "second," etc., used in this disclosure are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, the first XX can also be referred to as the second XX, and similarly, the second XX can also be referred to as the first XX.

[0049] In related technologies, the main power battery heating solutions in vehicle systems are: (1) using a stalled drive motor for heating; (2) using a PTC (Positive Temperature Coefficient) heater to heat the coolant of the power battery, transferring heat to the power battery through the coolant; and (3) heating the power battery by attaching an electric heating film to the battery surface. However, the stalled drive motor heating method requires the drive motor to be coupled to the motor wheel end, and a mechanical locking mechanism is needed to keep the wheel end stationary when the drive motor is stalled. During vehicle operation, the stalled drive motor heating control is complex and cannot guarantee the smoothness of the vehicle's driving torque, resulting in vehicle vibration during power battery heating. The PTC heater is affected by related wiring harnesses and installation space, making it inconvenient to set up and the cost of the vehicle-mounted PTC heater is high.

[0050] In view of this, embodiments of the present disclosure provide a heating system for a power battery. Figure 1 This is a schematic diagram illustrating a heating system for a power battery according to an exemplary embodiment, such as... Figure 1 As shown, the system includes: a power battery control module, a power battery, a power control module, and a generator. The generator is connected to the power control module, the power battery is connected to the power battery control module, and the power control module is connected to the power battery control module.

[0051] The power battery control module is used to collect the battery temperature information of the power battery and send the battery temperature information to the power control module.

[0052] The power control module is used to determine the target magnetic weakening power of the generator based on the battery temperature information, and to perform magnetic weakening heating on the power battery according to the target magnetic weakening power.

[0053] For example, in the embodiments of this disclosure, the heating system is applied in a hybrid vehicle. The power battery control module collects the battery temperature information of the corresponding power battery of the hybrid vehicle and sends the battery temperature information to the power control module. The power control module analyzes the battery temperature information. When it is determined that the battery temperature information is less than the temperature threshold, the target magnetic weakening power of the generator is determined according to the battery temperature information, and the magnetic weakening heating function of the generator is used to perform magnetic weakening heating on the power battery according to the target magnetic weakening power.

[0054] Optionally, the heating system also includes a cooling system connected to the generator and the power battery;

[0055] The generator is also used to perform magnetic weakening heating on the cooling system according to the target magnetic weakening power, so that the cooling system can obtain the target heat;

[0056] The cooling system is used to heat the power battery according to the target heat level.

[0057] For example, in the embodiments of this disclosure, the generator has a corresponding cooling system. Under normal operating conditions, the generator's cooling system is used to cool the generator to prevent damage due to excessively high operating temperature, and transfers the absorbed heat to the air through the radiator in the cooling system. When the battery temperature is below a temperature threshold, the cooling system absorbs the target heat generated by the generator's weak magnetic heating and transfers the target heat to the power battery, causing the power battery to heat up.

[0058] Optionally, the heating system further includes: a first solenoid valve and a second solenoid valve, wherein the first solenoid valve is connected to the generator and the cooling system, and the second solenoid valve is connected to the power battery and the cooling system.

[0059] For example, in an embodiment of this disclosure, the first solenoid valve is connected between the generator and the cooling system, and the second solenoid valve is connected between the power battery and the cooling system. When the system is operating normally and the battery temperature is within the normal temperature range, the first solenoid valve is closed and the second solenoid valve is open. The generator operates normally, exchanging heat with the air through the radiator to cool the generator and prevent overheating and damage. When the battery temperature is below a temperature threshold, the first solenoid valve is open and the second solenoid valve is closed. The generator's weak magnetic heating function heats the cooling system, causing it to absorb the target heat and transfer it to the power battery, thus raising the battery temperature.

[0060] Optionally, the power control module includes a generator control module and a vehicle control module; the vehicle control module is connected to the generator control module and the power battery control module; the generator control module is used to determine the target magnetic weakening power of the generator based on the battery temperature information, and to perform magnetic weakening heating on the power battery based on the target magnetic weakening power; the vehicle control module is used to determine the target magnetic weakening power of the generator based on the battery temperature information when the battery temperature information is less than the temperature threshold, and to send the target magnetic weakening power to the generator control module.

[0061] For example, in an embodiment of this disclosure, the power control module includes a generator control module and a vehicle control module. The generator control module is connected to the generator and is used to control the generator's operation according to the control signals from the vehicle control module. The vehicle control module is also connected to the power battery control module and is used to monitor the operating status of the power battery through the power battery control module, and determine the target magnetic weakening power of the generator based on the battery temperature information of the power battery. After the vehicle control module obtains the battery temperature information of the power battery through the power battery control module, when it determines that the battery temperature is less than a temperature threshold, it determines the target magnetic weakening power of the generator based on the battery temperature information and sends the target magnetic weakening power to the generator control module. The generator control module controls the generator to heat the power battery using the magnetic weakening heating function according to the target magnetic weakening power.

[0062] Optionally, the heating system also includes an engine connected to the vehicle control module.

[0063] For example, the heating system in the embodiments of this disclosure is applied to a hybrid vehicle. This hybrid vehicle can be started and driven by current generated by a generator, or by an engine powered by other energy sources. To eliminate the influence of the engine's operation on wheel-end coupling during battery heating, when the battery temperature is below a temperature threshold, the vehicle control module controls the engine to stop operating, and the generator provides driving force to the hybrid vehicle.

[0064] The system, based on the above technical solution, includes: a power battery control module, a power battery, a power control module, and a generator. The generator is connected to the power control module, the power battery is connected to the power battery control module, and the power control module is connected to the power battery control module. The power battery control module collects battery temperature information and sends it to the power control module. The power control module determines the target magnetic weakening power based on the battery temperature information and performs magnetic weakening heating on the power battery according to the target magnetic weakening power. This utilizes the generator's magnetic weakening heating function to heat the motor when the battery temperature is below a temperature threshold. The generator's magnetic weakening heating does not affect the vehicle's wheel-end drive, ensuring the smoothness of the vehicle's drive torque during power battery heating and reducing the cost of the battery heating system.

[0065] Figure 2 This is a flowchart illustrating a heating method for a power battery according to an exemplary embodiment, such as... Figure 2 As shown, the method includes:

[0066] Step S101: When the battery temperature information is less than the temperature threshold, determine the target magnetic weakening power of the generator based on the battery temperature information.

[0067] It is understood that the heating method provided in the embodiments of this disclosure can be applied to the aforementioned heating system, which is installed in a hybrid vehicle. This hybrid vehicle can be driven by either a generator or an engine. For example, ... Figure 2 The heating system shown may include a power battery, a power battery management module, a vehicle control module, a generator, and a generator control module. The power battery management module controls the start and stop of the power battery based on control signals from the vehicle control module, and monitors the power battery's operating status (including battery charge, battery temperature, and power battery wear). It transmits the power battery's operating status to the vehicle control module via a CAN (Controller Area Network) bus. The vehicle control module sends control signals to the generator control module based on the driver's operation signals, causing the generator control module to start or stop the generator. The power battery management module includes a temperature detection module to detect changes in the power battery's temperature. When the battery temperature drops below a threshold due to factors such as ambient temperature, the power battery management module sends this temperature information to the vehicle control module. The vehicle control module uses this battery temperature information to determine the target magnetic weakening power of the generator.

[0068] It is worth noting that the hybrid vehicle in this embodiment uses a lithium battery as its power battery. To ensure the power battery functions properly, its operating temperature needs to be controlled within a reasonable range. Too low a temperature increases battery polarization, resulting in poor charge / discharge characteristics; too high a temperature can easily lead to electrolyte decomposition and even battery combustion. Therefore, when the battery temperature is below a certain threshold, the generator's magnetic weakening heating function is used to heat the battery. When the battery temperature rises to the high-temperature threshold due to heating, the generator's magnetic weakening heating function is stopped. For example, the normal operating temperature range of the power battery can be set to 5℃-40℃. When the temperature is below 5℃, the power battery management module sends the battery temperature information to the vehicle controller, which then determines the target magnetic weakening power of the generator based on the battery temperature information.

[0069] The embodiments disclosed herein primarily utilize the magnetic weakening heating principle of a generator to heat the power battery. Based on the same type of vehicle-mounted system, the heat conduction efficiency of the generator's magnetic weakening heating remains constant. Through limited experiments, the target magnetic weakening power required for different heat demands can be determined, and the mapping relationship between multiple heat demands and multiple target magnetic weakening powers can be established based on the experiments. The corresponding heat demand is determined using battery temperature information uploaded by the power battery control module, and then the target magnetic weakening power corresponding to the heat demand is determined based on the mapping relationship.

[0070] Optionally, step S101 above includes:

[0071] Obtain the preset target temperature of the power battery.

[0072] Based on battery temperature information and preset target temperature, determine the target heat required by the power battery.

[0073] Based on the target heat and heat conversion rate, the target magnetic weakening power of the generator is determined. The heat conversion rate is the energy conversion rate between the generator's magnetic weakening power and the heat of the power battery.

[0074] For example, the vehicle system has a preset target temperature. If the battery temperature falls below a certain threshold, the battery needs to be heated to reach the preset target temperature. Based on the battery temperature and the preset target temperature, the temperature difference is determined, and the target heat output of the battery can be calculated using a heat calculation formula. In the same vehicle system, the generator generates heat through magnetic weakening control, and the heat conversion rate for transferring this heat to the battery is constant. Through limited experiments, the heat conversion rate of the heating system can be determined. This heat conversion rate is the energy conversion rate between the generator's magnetic weakening power and the battery's heat. Based on the target heat output and the heat conversion rate, the target magnetic weakening power of the generator is determined.

[0075] Step S102: Control the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power.

[0076] For example, after the vehicle control module determines the target field weakening power of the generator through the above steps, it sends this target field weakening power to the generator control module. The generator control module controls the generator to perform field weakening control based on the target field weakening power. By adjusting the stator current, it increases the stator direct-axis demagnetizing current component to maintain voltage balance during high-speed operation, thereby achieving field weakening speed enhancement and realizing the field weakening heating function. The target field weakening power determines the generator's field weakening current, and the power battery control module uses this current to control the generator for field weakening control, utilizing the heat generated during the field weakening process to heat the power battery.

[0077] The above scheme controls the generator in the hybrid vehicle to perform field weakening control, and transfers the heat generated during the field weakening control process to the power battery, thereby heating the power battery. The generator's field weakening heating does not generate torque and can be decoupled from the vehicle's state, making the power battery heating unaffected by the vehicle's operating conditions. The generator's field weakening heating function can be used to heat the power battery in various operating conditions, including when the vehicle is in motion, plugged into the charging gun, or stationary.

[0078] Figure 3 This is a flowchart illustrating another method for heating a power battery according to an exemplary embodiment, such as... Figure 3 As shown, the method includes:

[0079] Step S201: When the battery temperature information is less than the temperature threshold, determine the target magnetic weakening power of the generator based on the battery temperature information.

[0080] For example, in the embodiments of this disclosure, the method for determining the target field weakening power of the generator is the same as that in step S101 above, and can be referred to the method in step S101, which will not be repeated here.

[0081] Step S202: Control the power battery to connect to the cooling system corresponding to the generator.

[0082] It is worth mentioning that the vehicle system in the embodiments of this disclosure includes a cooling system. When the power battery is operating normally, the cooling system is connected to the generator, and the generator is cooled by the heat dissipation device in the cooling system to reduce the generator temperature. When it is necessary to heat the power battery, the power battery is connected to the cooling system. The generator is controlled to start the weak magnetic heating function and exchange heat with the cooling system, transferring heat to the cooling system. The cooling system then transfers heat to the power battery as it passes through the power battery, thereby heating the power battery. For example, this cooling system is a water-cooled fan system, mainly including a radiator, a water pump, and an auxiliary water tank.

[0083] Optionally, Figure 4 This is an example diagram illustrating a thermal management system for a hybrid vehicle according to an exemplary embodiment, such as... Figure 4 As shown, the thermal management system includes: a vehicle controller, a power battery management module, a power battery, a generator control module, a generator, a first solenoid valve, a second solenoid valve, a radiator, a water pump, and an auxiliary water tank. Step S202 above includes:

[0084] Close the first solenoid valve between the generator and the cooling system, and open the second solenoid valve between the power battery and the cooling system.

[0085] The power battery is connected to the cooling system based on the first and second solenoid valves.

[0086] For example, in an embodiment of this disclosure, the connection of the cooling system is controlled by a solenoid valve. During normal operation of the power battery, the second solenoid valve is closed and the first solenoid valve is opened, allowing the cooling system to connect to the generator and cool it during operation. When the battery temperature is abnormal and heating is required, the first solenoid valve between the generator and the cooling system is closed, and the second solenoid valve between the power battery and the cooling system is opened, allowing the cooling system to connect to the power battery and facilitating heat exchange between the generator and the power battery.

[0087] Step S203: Control the generator to perform magnetic weakening heating on the cooling system according to the target magnetic weakening power.

[0088] For example, after connecting the cooling system to the power battery through the above steps, the magnetic weakening current of the generator is determined according to the target magnetic weakening power, and the magnetic weakening current is used to control the generator to start the magnetic weakening heating function. The coolant in the cooling system exchanges heat with the generator, thereby realizing the magnetic weakening heating of the cooling system.

[0089] Step S204: Control the cooling system to heat the power battery.

[0090] For example, the coolant in the cooling system absorbs heat through heat exchange with the generator, and then uses the radiator in the cooling system to transfer the heat to the power battery, thereby achieving the cooling system heating the power battery.

[0091] The above solution involves installing a solenoid valve in the vehicle system to control the connection of the cooling system to the generator or power battery. The cooling system then facilitates heat exchange between the generator and the power battery, preventing component damage due to overheating during heat transfer. By cooling the generator and simultaneously heating the power battery, the energy utilization rate of the vehicle system is improved.

[0092] Figure 5 This is a flowchart illustrating another method for heating a power battery according to an exemplary embodiment, such as... Figure 5 As shown, the method includes:

[0093] Step S301: When the battery temperature information is less than the temperature threshold, determine the target magnetic weakening power of the generator based on the battery temperature information.

[0094] For example, in the embodiments of this disclosure, the method for determining the target magnetic weakening power is the same as in step S102 above, and can be referred to step S102, without further description.

[0095] Step S302: Obtain the generator speed.

[0096] It is worth noting that the generator's field weakening heating function is affected by the generator's motor speed. Field weakening heating can only be achieved when the generator is in normal operating condition. The generator's motor speed is used to confirm whether it is in normal operating condition. For example, in the embodiments of this disclosure, the generator control module can be used to read the generator's motor speed.

[0097] Step S303: When the motor speed is within the preset speed range, determine the generator's field weakening current based on the target field weakening power.

[0098] For example, after determining the generator speed through the above steps, the generator speed is compared with a preset speed range. When the generator speed is within this preset range, it is considered to be in normal operating condition and can be controlled for field weakening. The field weakening current is then determined based on the target field weakening power.

[0099] Alternatively, the magnetic weakening current can be determined in the following way:

[0100] Based on the target field weakening power, determine the corresponding excitation current and torque current of the generator.

[0101] Based on the excitation current and torque current, determine the corresponding field weakening current of the generator when the generator does not generate torque.

[0102] For example, in an embodiment of this disclosure, the torque of the generator can be calculated and determined using the following formula:

[0103]

[0104] Among them, T e This represents electromagnetic torque, where p is the number of pole pairs. Let i be the moment of inertia. q For torque current, i d For the excitation current, L dFor the d-axis stator inductance, L d It is the q-axis stator inductance.

[0105] To prevent the generator from producing torque, i.e., T e If it is 0, i is needed q It equals 0. According to the principle of permanent magnet synchronous motor, when the generator's field weakening current equals the excitation current, i.e., i s (weak magnetic current) = i d At that time, i q =0, corresponding to T e =0, at which point the generator produces no torque. Therefore, based on the target field weakening power and the current calculation formula, the corresponding excitation current and torque current of the generator can be determined. To prevent the generator from producing torque, the torque current is controlled to be zero, making the generator's field weakening current equal to the excitation current.

[0106] Step S304: Control the generator to perform magnetic weakening heating based on the magnetic weakening current.

[0107] For example, the weak magnetic current obtained through the above steps is used to control the generator to perform weak magnetic control, and the heat generated by the generator's weak magnetic control is transferred to the power battery to achieve weak magnetic heating of the power battery.

[0108] The above solution controls the generator in the hybrid vehicle to perform field weakening control, transferring the heat generated during this process to the power battery for heating. The generator's field weakening heating does not generate torque and can be decoupled from the vehicle's state, ensuring that the power battery heating is unaffected by the vehicle's operating conditions. This allows the generator's field weakening heating function to be used to heat the power battery while the vehicle is in motion, plugged into the charging gun, or stationary. Furthermore, it eliminates the need for additional control wiring harnesses and space in the vehicle system, reducing the heating cost of the power battery.

[0109] Figure 6 This is a block diagram illustrating a vehicle according to an exemplary embodiment. Figure 6 As shown, the vehicle 600 may include a processor 601 and a memory 602. The vehicle 600 may also include one or more of a multimedia component 603, an input / output interface 604, and a communication component 605.

[0110] The processor 601 controls the overall operation of the vehicle 600 to complete all or part of the steps in the aforementioned power battery heating method. The memory 602 stores various types of data to support the operation of the vehicle 600. This data may include, for example, instructions for any application or method operating on the vehicle 600, and application-related data such as contact data, sent and received messages, images, audio, video, etc. The memory 602 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. Multimedia component 603 may include a screen and an audio component. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 602 or transmitted via communication component 605. The audio component also includes at least one speaker for outputting audio signals. Input / output interface 604 provides an interface between processor 601 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 605 is used for wired or wireless communication between vehicle 600 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 4G, 5G, NB-IoT, eMTC, or other 5G technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 605 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0111] In an exemplary embodiment, the vehicle 600 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described heating method for the power battery.

[0112] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the power battery heating method described above. For example, the computer-readable storage medium may be the memory 602 including program instructions described above, which may be executed by the processor 601 of the vehicle 600 to complete the power battery heating method described above.

[0113] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a programmable device, the computer program having a code portion for performing the above-described heating method for a power battery when executed by the programmable device.

[0114] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0115] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction.

[0116] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A heating system for a power battery, characterized in that, The system, applicable to hybrid vehicles, includes: a power battery control module, a power battery, a power control module, a generator, and an engine. The power control module includes a generator control module and a vehicle control module. The generator is connected to the power control module, the power battery is connected to the power battery control module, the power control module is connected to the power battery control module, and the engine is connected to the vehicle control module. The power battery control module is used to collect the battery temperature information of the power battery and send the battery temperature information to the power control module. The power control module is used to determine the target magnetic weakening power of the generator based on the battery temperature information, and to perform magnetic weakening heating on the power battery based on the target magnetic weakening power. The generator control module is used to acquire the motor speed of the generator, determine the target magnetic weakening power of the generator based on the battery temperature information, and control the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power when the motor speed is within a preset speed range. The vehicle control module is used to control the engine to stop working when the battery temperature information is lower than the temperature threshold, and the generator provides driving force for the hybrid vehicle.

2. The system according to claim 1, characterized in that, The system also includes a cooling system connected to the generator and the power battery; The generator is also used to perform magnetic weakening heating on the cooling system according to the target magnetic weakening power, so that the cooling system obtains the target heat. The cooling system is used to heat the power battery according to the target heat.

3. The system according to claim 2, characterized in that, The system further includes a first solenoid valve and a second solenoid valve, wherein the first solenoid valve is connected to the generator and the cooling system, and the second solenoid valve is connected to the power battery and the cooling system.

4. The system according to any one of claims 1-3, characterized in that, The vehicle control module is connected to the generator control module and the power battery control module; the vehicle control module is also used to determine the target magnetic weakening power of the generator based on the battery temperature information when the battery temperature information is less than the temperature threshold, and send the target magnetic weakening power to the generator control module.

5. A method for heating a power battery, characterized in that, A heating system for a power battery as described in any one of claims 1-4, comprising: When the battery temperature information is lower than the temperature threshold, the target field weakening power of the generator is determined based on the battery temperature information; Controlling the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power includes: obtaining the motor speed of the generator; when the motor speed is within a preset speed range, controlling the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power; When the battery temperature is below a temperature threshold, the engine is controlled to stop working, and the generator provides driving force for the hybrid vehicle.

6. The heating method according to claim 5, characterized in that, Controlling the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power includes: Control the power battery to connect to the cooling system corresponding to the generator; The generator is controlled to perform magnetic weakening heating on the cooling system according to the target magnetic weakening power; The cooling system is controlled to heat the power battery.

7. The heating method according to claim 6, characterized in that, Controlling the connection of the power battery to the cooling system corresponding to the generator includes: Close the first solenoid valve between the generator and the cooling system, and open the second solenoid valve between the power battery and the cooling system.

8. The heating method according to claim 5, characterized in that, Determining the target magnetic weakening power of the generator based on the battery temperature information includes: Obtain the preset target temperature of the power battery; Based on the battery temperature information and the preset target temperature, the target heat required by the power battery is determined; The target magnetic weakening power of the generator is determined based on the target heat and the heat conversion rate, wherein the heat conversion rate is the energy conversion rate between the magnetic weakening power of the generator and the heat of the power battery.

9. The heating method according to claim 5, characterized in that, Controlling the generator to perform magnetic weakening heating on the power battery according to the target magnetic weakening power includes: The magnetic weakening current of the generator is determined based on the target magnetic weakening power; The generator is controlled to perform magnetic weakening heating based on the magnetic weakening current.

10. The heating method according to claim 9, characterized in that, Determining the field-weakening current of the generator based on the target field-weakening power includes: Based on the target field weakening power, determine the excitation current and torque current corresponding to the generator; Based on the excitation current and the torque current, the field weakening current corresponding to the generator when the generator does not generate torque is determined.

11. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the heating method for the power battery as described in any one of claims 5-10.

12. A vehicle, characterized in that, include: The heating system of the power battery as described in any one of claims 1-4, or the non-transitory computer-readable storage medium as described in claim 11.

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