Battery temperature regulation method and device, terminal equipment and computer storage medium

Abstract

The application discloses a battery temperature adjusting method and device, a terminal device and a computer storage medium, and relates to the technical field of vehicles. The battery temperature adjusting method comprises the following steps: detecting the real-time residual power of a power battery in a vehicle, and judging whether the real-time residual power is less than a preset power threshold; if it is judged that the real-time residual power is less than the power threshold, starting a power amplifier in the vehicle, and determining the maximum output power corresponding to the power amplifier and the real-time maximum charging power corresponding to the power battery; calculating the whole vehicle power corresponding to the vehicle, adjusting the real-time maximum charging power based on the whole vehicle power to obtain a current change value corresponding to the power battery; and adjusting the current generated by the power amplifier based on the current change value, so that the power amplifier preferentially provides current for a battery heating module in the vehicle, thereby adjusting the temperature of the power battery. The application can improve the charging efficiency of the power battery in a low-temperature environment.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method, apparatus, terminal device, and computer-readable storage medium for regulating the temperature of a battery. Background Technology

[0002] With the continuous development of the new energy vehicle industry, range-extended electric vehicles (REEVs) have become the choice of more and more users. However, because REEVs are equipped with range extenders to increase the vehicle's range, users often don't pay attention to the battery level while driving, leading to the battery remaining at its minimum charge level for extended periods. Consequently, when the vehicle is in a low-temperature environment, the range extender may be unable to charge the battery, making it impossible for the user to drive the vehicle normally.

[0003] Currently, in low-temperature environments, range-extended electric vehicles mainly rely on the engine coolant to carry heat to heat the battery, thereby bringing the battery to a normal temperature and enabling the range extender to charge the battery. However, in low-temperature environments, the engine coolant heats up slowly, making it difficult to effectively heat the battery, thus preventing the vehicle from quickly reaching a normal driving state. Summary of the Invention

[0004] The main objective of this application is to provide a method, apparatus, terminal device, and computer-readable storage medium for regulating the temperature of a battery, which aims to increase the battery temperature of a power battery in low-temperature environments, thereby improving the charging efficiency of the power battery in low-temperature environments, and enabling range-extended electric vehicles to quickly enter normal driving conditions when in low-temperature environments.

[0005] To achieve the above objectives, this application provides a method for regulating the temperature of a battery, the method comprising the following steps:

[0006] The system detects the real-time remaining charge of the vehicle's power battery and determines whether the real-time remaining charge is less than a preset charge threshold.

[0007] If it is determined that the real-time remaining power is less than the power threshold, the range extender in the vehicle is activated, and the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery are determined.

[0008] Calculate the vehicle power corresponding to the vehicle, and adjust the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery;

[0009] The range extender adjusts the current generated by the range extender based on the current change value, so that the range extender prioritizes providing current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery.

[0010] Further, the step of determining the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery includes:

[0011] Detect the engine coolant temperature corresponding to the engine in the vehicle;

[0012] The maximum output power of the range extender is determined based on the engine coolant temperature.

[0013] Furthermore, the step of determining the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery further includes:

[0014] Detect the real-time battery temperature corresponding to the power battery;

[0015] The real-time maximum charging power of the power battery is determined based on the real-time battery temperature.

[0016] Further, the step of determining the real-time maximum charging power of the power battery based on the real-time battery temperature includes:

[0017] Obtain a preset temperature-power curve, wherein the temperature-power curve includes each standard battery temperature and the standard charging power of the power battery at each standard battery temperature;

[0018] Based on the real-time battery temperature, the temperature-power curve is queried to determine the target battery temperature that is the same as the real-time temperature value among the standard battery temperatures, and the standard charging power corresponding to the target battery temperature is determined as the real-time maximum charging power corresponding to the power battery.

[0019] Furthermore, the step of calculating the vehicle's overall power also includes:

[0020] The power consumption of the pedals, battery heating power, and overall vehicle electrical systems of the vehicle are detected.

[0021] The vehicle power is obtained by summing the pedal power request, the battery heating power, the vehicle electrical power consumption, and the real-time maximum charging power.

[0022] Further, the step of adjusting the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery includes:

[0023] The third comparison result is obtained by comparing the total vehicle power with the maximum output power;

[0024] If the third comparison result indicates that the vehicle power is greater than the maximum output power, then the real-time maximum charging power is reduced to obtain the current change value corresponding to the power battery.

[0025] Furthermore, after the step of adjusting the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery, the method further includes:

[0026] When the real-time maximum charging power decreases to 0, it is determined whether the adjusted vehicle power is greater than the maximum output power.

[0027] If it is determined that the adjusted vehicle power is greater than the maximum output power, the pedal power request is reduced so that the range extender prioritizes providing current to the battery heating module in the vehicle to regulate the temperature of the power battery.

[0028] Furthermore, to achieve the above objectives, this application also provides a battery temperature regulation device, the device comprising:

[0029] The power detection module is used to detect the real-time remaining power of the vehicle's power battery and determine whether the real-time remaining power is less than a preset power threshold.

[0030] The power determination module is used to activate the range extender in the vehicle if it is determined that the real-time remaining power is less than the power threshold, and to determine the maximum output power of the range extender and the real-time maximum charging power of the power battery.

[0031] The power adjustment module is used to calculate the vehicle power corresponding to the vehicle, and adjust the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery.

[0032] A temperature regulation module is used to adjust the current generated by the range extender based on the current change value, so that the range extender prioritizes providing current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery.

[0033] In addition, to achieve the above objectives, this application also provides a terminal device, the terminal device including: a memory, a processor, and a battery temperature regulation program stored in the memory and executable on the processor, wherein when the battery temperature regulation program is executed by the processor, it implements the steps of the battery temperature regulation method as described above.

[0034] In addition, to achieve the above objectives, this application also provides a computer-readable storage medium storing a battery temperature regulation program, which, when executed by a processor, implements the steps of the battery temperature regulation method described above.

[0035] The battery temperature regulation method, apparatus, terminal device, and computer medium provided in this application embodiment detect the real-time remaining power of the power battery in the vehicle and determine whether the real-time remaining power is less than a preset power threshold. If the real-time remaining power is determined to be less than the power threshold, the range extender in the vehicle is activated, and the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery are determined. The overall vehicle power is calculated, and the real-time maximum charging power is adjusted based on the overall vehicle power to obtain a current change value corresponding to the power battery. The current generated by the range extender is adjusted based on the current change value so that the range extender prioritizes providing current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery.

[0036] In this embodiment, when the terminal device is running, it first calls the detection module to detect the power battery in the vehicle, thereby obtaining the real-time remaining power of the power battery. Simultaneously, the terminal device obtains a power threshold preset by the technician and compares the real-time remaining power with the power threshold to obtain a first comparison result. Then, if the terminal device determines based on the first comparison result that the real-time remaining power is less than the power threshold, it controls the range extender configured in the vehicle to start, and determines the maximum output power of the range extender and the real-time maximum charging power of the power battery under the current environment. Afterwards, the terminal device detects the various electrical components in the vehicle... The module performs detection to obtain the vehicle's overall power and compares this power with the maximum output power of the range extender to obtain a second comparison result. Based on this second comparison result, it adjusts the real-time maximum charging power of the power battery to obtain the current change value of the power battery. Finally, the terminal device adjusts the current generated by the range extender according to the current change value through the battery management system, thereby reducing the charging current in the power battery input value of the range extender and causing the current generated by the range extender to flow first into the battery heating module in the vehicle, so that the battery heating module heats the power battery and regulates the temperature of the power battery.

[0037] Thus, this application adjusts the real-time maximum charging power of the power battery to achieve the optimal charging power corresponding to the ambient temperature, and adjusts the charging current input from the range extender to the power battery based on this optimal charging power. This allows the range extender to charge the power battery at the optimal charging efficiency, thereby avoiding the situation where excessive current causes a large amount of lithium metal to deposit on the negative electrode surface of the power battery, reducing the lifespan of the lithium battery, when charging the power battery in a low-temperature environment. At the same time, this application controls the range extender to supply power to the battery heating module, and the battery heating module heats the power battery, achieving the technical effect of increasing the corresponding battery temperature in a low-temperature environment, thereby improving the charging efficiency of the power battery in a low-temperature environment. As a result, the range-extended vehicle can still quickly enter a normal driving state in a low-temperature environment. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the terminal device in the hardware operating environment involved in the embodiments of this application;

[0039] Figure 2 This is a flowchart illustrating the first embodiment of the battery temperature regulation method of this application;

[0040] Figure 3 This is a flowchart illustrating the second embodiment of the battery temperature regulation method of this application;

[0041] Figure 4 This is a schematic diagram of the range extender power generation process according to an embodiment of the battery temperature regulation method of this application;

[0042] Figure 5 This is a schematic diagram of the functional modules involved in an embodiment of the battery temperature regulation method of this application.

[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0045] Reference Figure 1 , Figure 1 This is a schematic diagram of the terminal device structure of the hardware operating environment involved in the embodiments of this application.

[0046] It should be noted that the terminal device in this application embodiment can be a device that executes the battery temperature regulation method of this application. Specifically, the terminal device can be a vehicle or a vehicle-mounted system, battery management system, mobile terminal, data storage control terminal, PC, or other terminal connected to the vehicle.

[0047] like Figure 1 As shown, the terminal device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the terminal device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0049] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and a battery temperature regulation program.

[0050] exist Figure 1 In the terminal device shown, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the terminal device of this application can be set in the terminal device, and the terminal device calls the battery temperature adjustment program stored in the memory 1005 through the processor 1001 and performs the following operations:

[0051] The system detects the real-time remaining charge of the vehicle's power battery and determines whether the real-time remaining charge is less than a preset charge threshold.

[0052] If it is determined that the real-time remaining power is less than the power threshold, the range extender in the vehicle is activated, and the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery are determined.

[0053] Calculate the vehicle power corresponding to the vehicle, and adjust the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery;

[0054] The range extender adjusts the current generated by the range extender based on the current change value, so that the range extender prioritizes providing current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery.

[0055] Furthermore, the processor 1001 calls the battery temperature regulation program stored in the memory 1005 and performs the following operations:

[0056] Detect the engine coolant temperature corresponding to the engine in the vehicle;

[0057] The maximum output power of the range extender is determined based on the engine coolant temperature.

[0058] Furthermore, the processor 1001 calls the battery temperature regulation program stored in the memory 1005 and performs the following operations:

[0059] Detect the real-time battery temperature corresponding to the power battery;

[0060] The real-time maximum charging power of the power battery is determined based on the real-time battery temperature.

[0061] Furthermore, the processor 1001 calls the battery temperature regulation program stored in the memory 1005 and performs the following operations:

[0062] Obtain a preset temperature-power curve, wherein the temperature-power curve includes each standard battery temperature and the standard charging power of the power battery at each standard battery temperature;

[0063] Based on the real-time battery temperature, the temperature-power curve is queried to determine the target battery temperature that is the same as the real-time temperature value among the standard battery temperatures, and the standard charging power corresponding to the target battery temperature is determined as the real-time maximum charging power corresponding to the power battery.

[0064] Furthermore, the processor 1001 calls the battery temperature regulation program stored in the memory 1005 and performs the following operations:

[0065] The power consumption of the pedals, battery heating power, and overall vehicle electrical systems of the vehicle are detected.

[0066] The vehicle power is obtained by summing the pedal power request, the battery heating power, the vehicle electrical power consumption, and the real-time maximum charging power.

[0067] Furthermore, the processor 1001 calls the battery temperature regulation program stored in the memory 1005 and performs the following operations:

[0068] The third comparison result is obtained by comparing the total vehicle power with the maximum output power;

[0069] If the third comparison result indicates that the vehicle power is greater than the maximum output power, then the real-time maximum charging power is reduced to obtain the current change value corresponding to the power battery.

[0070] Furthermore, the processor 1001 calls the battery temperature regulation program stored in the memory 1005 and performs the following operations:

[0071] When the real-time maximum charging power decreases to 0, it is determined whether the adjusted vehicle power is greater than the maximum output power.

[0072] If it is determined that the adjusted vehicle power is greater than the maximum output power, the pedal power request is reduced so that the range extender prioritizes providing current to the battery heating module in the vehicle to regulate the temperature of the power battery.

[0073] Based on the aforementioned terminal device, the overall concept of the battery temperature regulation method of this application is provided.

[0074] Because modern range-extended electric vehicles are equipped with range extenders to increase the vehicle's range, users often don't pay attention to the battery level while driving, resulting in the battery remaining at its minimum charge level for extended periods. Consequently, when the vehicle is in a low-temperature environment, the range extender may be unable to charge the battery, making it impossible for the user to drive the vehicle normally.

[0075] Currently, in low-temperature environments, range-extended electric vehicles mainly rely on the engine coolant to carry heat to heat the battery, thereby bringing the battery to a normal temperature and enabling the range extender to charge the battery. However, in low-temperature environments, the engine coolant heats up slowly, making it difficult to effectively heat the battery, thus preventing the vehicle from quickly reaching a normal driving state.

[0076] To address the aforementioned issues, this application proposes a battery temperature regulation method. This method involves detecting the real-time remaining charge of the vehicle's power battery and determining whether the real-time remaining charge is less than a preset charge threshold. If the real-time remaining charge is less than the charge threshold, the range extender in the vehicle is activated, and the maximum output power of the range extender and the real-time maximum charging power of the power battery are determined. The overall vehicle power is calculated, and the real-time maximum charging power is adjusted based on the overall vehicle power to obtain a current change value corresponding to the power battery. The current generated by the range extender is adjusted based on the current change value, so that the range extender prioritizes providing current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery.

[0077] Thus, this application adjusts the real-time maximum charging power of the power battery to achieve the optimal charging power corresponding to the ambient temperature, and adjusts the charging current input from the range extender to the power battery based on this optimal charging power. This allows the range extender to charge the power battery at the optimal charging efficiency, thereby avoiding the situation where excessive current causes a large amount of lithium metal to deposit on the negative electrode surface of the power battery, reducing the lifespan of the lithium battery, when charging the power battery in a low-temperature environment. At the same time, this application controls the range extender to supply power to the battery heating module, and the battery heating module heats the power battery, achieving the technical effect of increasing the corresponding battery temperature in a low-temperature environment, thereby improving the charging efficiency of the power battery in a low-temperature environment. As a result, the range-extended vehicle can still quickly enter a normal driving state in a low-temperature environment.

[0078] Based on the overall concept of the terminal device and the temperature regulation method of the battery in this application described above, various embodiments of the temperature regulation method of the battery in this application are further proposed.

[0079] Please refer to Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the battery temperature regulation method of this application.

[0080] It should be understood that although the logical order is shown in the flowchart, in some cases, the battery temperature regulation method of this application may of course perform the steps shown or described in a different order than that shown here.

[0081] Furthermore, in this embodiment, the battery temperature regulation method of this application is applied to a terminal device connected to the vehicle's infotainment system.

[0082] like Figure 2 As shown, in this embodiment, the battery temperature regulation method of this application may include the following steps:

[0083] Step S10: Detect the real-time remaining power of the vehicle's power battery and determine whether the real-time remaining power is less than a preset power threshold.

[0084] The power threshold is a threshold used to determine whether the battery power is at a low level. This power threshold can be pre-set by technicians and stored in the storage device of the terminal device so that the terminal device can directly read the storage device when needed. Alternatively, it can be set by technicians and uploaded to a third-party server so that the terminal device can access the third-party server to obtain the power threshold when needed. It is understood that this application does not restrict the storage method of the power threshold, and the specific value of the power threshold can be set as a percentage value or as a specific power value. This application also does not restrict this.

[0085] In this embodiment, when the terminal device is running, it first calls the internally configured detection unit to detect the power battery in the vehicle, thereby obtaining the real-time remaining power of the power battery. At the same time, the terminal device reads the internally configured storage device to obtain the power threshold preset by the technician, and compares the real-time remaining power with the power threshold to obtain a first comparison result. The terminal device then determines whether the real-time remaining power is less than the power threshold based on the first comparison result.

[0086] For example, when the terminal device is running, it first detects the battery pack in the vehicle through the internally configured power detection device to determine the current real-time remaining power of the battery pack. At the same time, the terminal device reads the internally configured storage device to obtain the power threshold of 20% preset by the technician, and compares the real-time remaining power with the power threshold of 20% to obtain a first comparison result. The terminal device then determines whether the real-time remaining power is less than 20% based on the first comparison result.

[0087] Step S20: If it is determined that the real-time remaining power is less than the power threshold, then the range extender in the vehicle is activated, and the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery are determined.

[0088] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the range extender power generation process according to an embodiment of the battery temperature regulation method of this application. The range extender is an automotive component that can provide additional electrical energy to a vehicle, thereby increasing the vehicle's driving range, such as... Figure 4As shown, the range extender generates alternating current (AC) during power generation. This AC is converted to direct current (DC) via an AC-DC converter module. The DC is then input into the power battery and battery management system (BMS) to charge the power battery. Simultaneously, the converted DC also flows into the battery heating module, vehicle electrical modules, and motor, respectively, supplying power to the various electrical components within the vehicle. It is understood that this application does not limit the specifications or model of the range extender, and the specific location of the range extender can be referenced from the location of range extenders in similar electric vehicles; this application also does not impose any restrictions on this.

[0089] In this embodiment, if the terminal device determines that the real-time remaining power is less than a preset power threshold based on the first comparison result, it determines that the power battery needs to be charged, thereby activating the range extender in the vehicle and detecting the maximum output power of the range extender and the real-time maximum charging power of the power battery corresponding to the current environment.

[0090] For example, if the terminal device determines that the real-time remaining battery power is less than 20% based on the first comparison result described above, it determines that the battery pack's power is low and therefore needs to be charged. The terminal device then controls the range extender in the vehicle to turn on and detects the range extender to obtain its current maximum output power Pe. max Simultaneously, the terminal device uses a temperature detection device to detect the battery pack, thereby determining the maximum charging power Pc of the battery pack under the current environment. max .

[0091] Furthermore, in a feasible embodiment, the step of "determining the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery" in step S20 above may specifically include:

[0092] Step S201: Detect the engine coolant temperature corresponding to the engine in the vehicle;

[0093] In this embodiment, when the terminal device starts the range extender, it calls the detection unit to detect the engine in the vehicle, thereby obtaining the engine coolant temperature.

[0094] Step S202: Determine the maximum output power corresponding to the range extender based on the engine coolant temperature;

[0095] In this embodiment, the terminal device determines the maximum output power of the range extender at this time based on the engine coolant temperature.

[0096] For example, when the terminal device starts the range extender, it calls the temperature detection device included in the detection module unit to detect the vehicle's engine, thereby determining the engine coolant temperature. The terminal device then determines the maximum output power Pe of the range extender at that time based on the engine coolant temperature. max .

[0097] Furthermore, in a feasible embodiment, the step of "determining the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery" in step S20 above may further include:

[0098] Step S203: Detect the real-time battery temperature corresponding to the power battery;

[0099] Step S204: Determine the real-time maximum charging power of the power battery based on the real-time battery temperature;

[0100] For example, the terminal device calls the aforementioned temperature sensor to detect the battery pack, thereby obtaining the real-time temperature value of the battery pack when the range extender starts. Then, the terminal device obtains a preset temperature-power query curve (CUR), and determines the maximum charging power Pc of the battery pack at the real-time temperature value based on the CUR. max .

[0101] Furthermore, in a feasible embodiment, step S204 above may specifically include:

[0102] Step S2041: Obtain a preset temperature-power curve, wherein the temperature-power curve includes the temperature of each standard battery and the standard charging power of the power battery at each of the standard battery temperatures;

[0103] The temperature-power curve is a curve that includes the temperature of each battery and the maximum charging power of the power battery at each battery temperature. This temperature-power curve is obtained by technicians in the laboratory by placing the power battery at different temperatures. The temperature-power curve is stored in a storage device before the vehicle leaves the factory so that the terminal device can read the storage device to obtain the temperature-power curve when needed.

[0104] In this embodiment, the terminal device first reads the storage device to obtain the temperature-power curve, which contains the temperature of each standard battery and the standard charging power of the power battery at each standard battery temperature, which is pre-stored by the technician.

[0105] Step S2042: Based on the real-time battery temperature, query the temperature-power curve to determine the target battery temperature that is the same as the real-time temperature value among the standard battery temperatures, and determine the standard charging power corresponding to the target battery temperature as the real-time maximum charging power corresponding to the power battery.

[0106] In this embodiment, the terminal device queries the temperature-power curve based on the acquired real-time temperature value, thereby determining the target battery temperature that is the same as the real-time temperature value among multiple standard battery temperatures included in the temperature-power curve. The terminal device then determines the standard battery temperature corresponding to the target battery temperature within the temperature-power curve, and determines the standard battery temperature corresponding to the target battery temperature as the maximum charging power of the battery pack at the real-time temperature value.

[0107] For example, the terminal device first reads from the storage device to obtain a temperature-power query curve (CUR) pre-stored by a technician, which includes standard temperature values ​​and the standard charging power of the battery at each standard temperature value. The terminal device then queries the temperature-power query curve CUR based on the obtained real-time temperature value to determine a target temperature value that matches the real-time temperature value among the standard temperature values ​​included in the temperature-power query curve CUR, and determines the standard charging power corresponding to the target temperature value in the temperature-power query curve CUR. The terminal device then determines the standard charging power corresponding to the target temperature value as the maximum charging power Pc of the battery pack in the current environment. max .

[0108] Step S30: Calculate the vehicle power corresponding to the vehicle, and adjust the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery;

[0109] In this embodiment, the terminal device calls the detection unit to detect each power module contained in the vehicle to determine the corresponding vehicle power, and compares the vehicle power with the maximum output power corresponding to the range extender to obtain a second comparison result. The terminal device then adjusts the maximum charging power of the power battery based on the second comparison result, and determines the current change value of the power battery during the adjustment of the maximum charging power.

[0110] For example, the terminal device calls the detection unit to detect the battery heating module, vehicle electrical module, and motor contained in the vehicle to determine the power consumption of each electrical module. Then, based on the power consumption of each module, the terminal device determines the vehicle's overall power consumption P. Afterward, the terminal device compares the calculated vehicle power consumption P with the maximum output power Pe of the range extender. maxThis yields a second comparison result, and the terminal device then uses this second comparison result to adjust the maximum charging power Pc corresponding to the battery pack. max Adjustments are made to allow the vehicle's BMS (Battery Management System) to operate based on the maximum charging power Pc. max The change in current adjusts the magnitude of the charging current input to the battery pack and determines the value of the current change.

[0111] Furthermore, in a feasible embodiment, the step of "calculating the vehicle power corresponding to the vehicle" in step S30 above may specifically include:

[0112] Step S301: Detect the pedal request power, battery heating power, and vehicle electrical power consumption corresponding to the vehicle;

[0113] The pedal power request is the power of the motor in the vehicle when the driver presses the pedal. The battery heating power is the power of the battery heating module in the terminal device when heating the battery pack. Similarly, the vehicle electrical power consumption is the power of other electrical components in the vehicle when they are working.

[0114] In this embodiment, the terminal device uses a detection unit to detect the pedals inside the vehicle to determine the pedal power requested by the user when pressing the pedals. At the same time, the terminal device uses the same detection unit to detect the battery heating module to determine the battery heating power corresponding to the battery heating module. Additionally, the terminal device uses the same detection unit to detect the vehicle electrical modules to determine the vehicle electrical power consumption corresponding to the vehicle electrical modules.

[0115] Step S302: Sum the pedal requested power, the battery heating power, the vehicle electrical power consumption, and the real-time maximum charging power to obtain the vehicle power corresponding to the vehicle;

[0116] In this embodiment, the terminal device sums the obtained pedal request power, battery heating power, vehicle electrical power consumption, and the real-time maximum charging power corresponding to the power battery to obtain the vehicle power.

[0117] For example, the terminal device first detects the pedals inside the vehicle through a detection unit to determine the pedal power Pd requested by the user. Simultaneously, the terminal device detects the battery heating module to determine the battery heating power Ph consumed by the battery heating module when heating the battery. Also, the terminal device detects the vehicle's electrical modules to determine the total electrical power consumption Pv. Then, the terminal device combines the acquired pedal power Pd, battery heating power Ph, electrical power consumption Pv, ​​and maximum charging power Pc. maxThe summation yields the total vehicle power P = Pd + Pc max +Ph+Pv.

[0118] It should be noted that, in this embodiment, the terminal device can detect the pedals inside the vehicle through a detection device, thereby detecting the angle change value of the pedal when the user presses the pedal, and then determining the corresponding pedal request power Pd based on the angle change value.

[0119] Furthermore, in a feasible embodiment, the step S30 above, "adjusting the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery," may specifically include:

[0120] Step S303: Compare the total vehicle power with the maximum output power to obtain a third comparison result;

[0121] In this embodiment, after obtaining the total vehicle power, the terminal device compares the total vehicle power with the maximum output power corresponding to the range extender to obtain a third comparison result.

[0122] Step S304: If the third comparison result is that the vehicle power is greater than the maximum output power, then reduce the real-time maximum charging power to obtain the current change value corresponding to the power battery;

[0123] In this embodiment, if the terminal device determines that the third comparison result is that the vehicle power is greater than the maximum output power corresponding to the range extender, it will adjust the power battery settings to reduce the real-time maximum charging power corresponding to the power battery, thereby reducing the current input from the range extender to the power battery, and thus determining the current change value corresponding to the charging current flowing into the power battery during the adjustment of the real-time maximum charging power.

[0124] For example, after obtaining the total vehicle power P, the terminal device will compare the total vehicle power P with the maximum output power Pe corresponding to the range extender. max The comparison yields a third comparison result. Subsequently, if the terminal device determines that the third comparison result is P > Pe... max Then the real-time maximum charging power Pc of the battery pack max Adjustments are made to reduce the real-time maximum charging power Pc. max This leads to a reduction in the real-time maximum charging power Pc. max This reduces the charging current input to the battery pack by the range extender, allowing the terminal device to determine the real-time maximum charging power Pc. max The change in current flowing into the power battery during the adjustment process.

[0125] Step S40: Adjust the current generated by the range extender based on the current change value, so that the range extender preferentially provides current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery;

[0126] In this embodiment, the terminal device calls the battery management system to redistribute the total current generated by the range extender according to the acquired current change value, so that the current generated by the range extender flows first into the battery heating module in the vehicle, so as to heat the power battery through the battery heating module and thereby regulate the battery temperature of the power battery.

[0127] For example, the terminal device may invoke the BMS to redistribute the total current generated by the range extender according to the adjusted current change value, thereby allowing the range extender to maintain its maximum output power Pe. max If the current remains unchanged, it will be preferentially input to the battery heating module in the terminal device, and then the resistance wire in the battery heating module will heat the battery pack to raise the battery temperature to the normal temperature range.

[0128] In this embodiment, when the terminal device is running, it first calls the internally configured detection unit to detect the power battery in the vehicle, thereby obtaining the real-time remaining power of the power battery. Simultaneously, the terminal device reads the internally configured storage device to obtain a power threshold preset by a technician, and compares the real-time remaining power with the power threshold to obtain a first comparison result. The terminal device then determines whether the real-time remaining power is less than the power threshold based on the first comparison result. If the terminal device determines that the real-time remaining power is less than the preset power threshold based on the first comparison result, it determines that the power battery needs to be charged, thereby activating the range extender in the vehicle and detecting the maximum output power of the range extender and the power battery's relative position to the current environment. The real-time maximum charging power is then determined. Next, the terminal device calls the detection unit to detect each electrical module within the vehicle to determine the overall vehicle power. This overall vehicle power is then compared with the maximum output power of the range extender to obtain a second comparison result. Based on this second comparison result, the terminal device adjusts the maximum charging power of the power battery and determines the current change value of the power battery during the adjustment process. Finally, the terminal device calls the battery management system to redistribute the total current generated by the range extender according to the obtained current change value. This ensures that the current generated by the range extender preferentially flows into the battery heating module within the vehicle, thereby heating the power battery and regulating its temperature.

[0129] Thus, this application adjusts the real-time maximum charging power of the power battery to achieve the optimal charging power corresponding to the ambient temperature, and adjusts the charging current input from the range extender to the power battery based on this optimal charging power. This allows the range extender to charge the power battery at the optimal charging efficiency, thereby avoiding the situation where excessive current causes a large amount of lithium metal to deposit on the negative electrode surface of the power battery, reducing the lifespan of the lithium battery, when charging the power battery in a low-temperature environment. At the same time, this application controls the range extender to supply power to the battery heating module, and the battery heating module heats the power battery, achieving the technical effect of increasing the corresponding battery temperature in a low-temperature environment, thereby improving the charging efficiency of the power battery in a low-temperature environment. As a result, the range-extended vehicle can still quickly enter a normal driving state in a low-temperature environment.

[0130] Furthermore, based on the first embodiment of the battery temperature regulation method of this application described above, a second embodiment of the battery temperature regulation method of this application is proposed herein.

[0131] Please refer to Figure 3 , Figure 3 This is a schematic flowchart of the second embodiment of the battery temperature regulation method of this application. After step S40 above, the battery temperature regulation method of this application may further include the following steps:

[0132] Step A10: When the real-time maximum charging power decreases to 0, determine whether the adjusted vehicle power is greater than the maximum output power;

[0133] In this embodiment, after the terminal device reduces the real-time maximum charging power corresponding to the power battery to 0, it determines whether the adjusted vehicle power is greater than the maximum output power corresponding to the range extender.

[0134] Step A20: If it is determined that the adjusted vehicle power is greater than the maximum output power, the pedal power request is reduced so that the range extender prioritizes providing current to the battery heating module in the vehicle to regulate the temperature of the power battery.

[0135] In this embodiment, if the terminal device determines that the overall vehicle power is still greater than the maximum output power corresponding to the range extender, it reduces the pedal request power so that the battery management system can prioritize inputting the generated current to the battery heating module while keeping the maximum output power corresponding to the range extender unchanged. This allows the battery heating module to heat the power battery and regulate its temperature.

[0136] For example, the terminal device adjusts the real-time maximum charging power Pc corresponding to the power battery. maxWhen the power reaches 0, check whether the total vehicle power P is still greater than the maximum output power Pe corresponding to the range extender. max Afterwards, if the terminal device determines the real-time maximum charging power Pc max It was reduced to 0, but the total vehicle power P was still greater than the maximum output power Pe corresponding to the range extender. max This further reduces the pedal request power Pd, allowing the BMS to output the maximum power Pe corresponding to the range extender. max If the situation remains unchanged, the generated current will be preferentially input to the battery heating module so that the resistance wire in the battery heating module generates heat based on the current and heats the battery pack.

[0137] In this embodiment, after the terminal device reduces the real-time maximum charging power corresponding to the power battery to 0, it determines whether the adjusted vehicle power is greater than the maximum output power corresponding to the range extender. If the terminal device determines that the vehicle power is still greater than the maximum output power corresponding to the range extender, it reduces the pedal request power so that the battery management system can prioritize inputting the generated current to the battery heating module while keeping the maximum output power corresponding to the range extender unchanged. This allows the battery heating module to heat the power battery and adjust its temperature.

[0138] Thus, by reducing the pedal request power after reducing the real-time maximum charging power to 0, this application allows the current generated by the range extender to flow preferentially into the battery heating module, enabling the battery heating module to heat the power battery more quickly in low-temperature environments, thereby allowing the battery temperature to rise to the normal range more quickly.

[0139] In addition, to achieve the above objectives, this application also provides a battery temperature regulation device, please refer to... Figure 5 , Figure 5 This is a schematic diagram of the functional modules involved in an embodiment of the battery temperature regulation method of this application, as shown below. Figure 5 As shown, the device includes:

[0140] The power detection module 10 is used to detect the real-time remaining power of the power battery in the vehicle and determine whether the real-time remaining power is less than a preset power threshold.

[0141] The power determination module 20 is used to activate the range extender in the vehicle if it is determined that the real-time remaining power is less than the power threshold, and to determine the maximum output power of the range extender and the real-time maximum charging power of the power battery.

[0142] The power adjustment module 30 is used to calculate the vehicle power corresponding to the vehicle, and adjust the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery.

[0143] Temperature regulation module 40 is used to adjust the current generated by the range extender based on the current change value, so that the range extender prioritizes providing current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery.

[0144] Furthermore, the power determination module 20 includes:

[0145] A water temperature detection unit is used to detect the engine water temperature corresponding to the engine in the vehicle.

[0146] A power calculation unit is used to determine the maximum output power of the range extender based on the engine coolant temperature.

[0147] Furthermore, the power determination module 20 also includes:

[0148] A battery temperature detection unit is used to detect the real-time battery temperature corresponding to the power battery;

[0149] The charging power calculation unit is used to determine the real-time maximum charging power of the power battery based on the real-time battery temperature.

[0150] Furthermore, the charging power calculation unit includes:

[0151] The curve acquisition subunit is used to acquire a preset temperature-power curve, wherein the temperature-power curve includes the temperature of each standard battery and the standard charging power of the power battery at each of the standard battery temperatures.

[0152] The curve lookup subunit is used to query the temperature-power curve based on the real-time battery temperature, so as to determine the target battery temperature that is the same as the real-time temperature value among the standard battery temperatures, and to determine the standard charging power corresponding to the target battery temperature as the real-time maximum charging power corresponding to the power battery.

[0153] Furthermore, the power regulation module 30 includes:

[0154] The power module detection unit is used to detect the pedal power request, battery heating power and vehicle electrical power consumption of the vehicle.

[0155] The vehicle power calculation unit is used to sum the pedal requested power, the battery heating power, the vehicle electrical power consumption, and the real-time maximum charging power to obtain the corresponding vehicle power.

[0156] Furthermore, the power regulation module 30 also includes:

[0157] The first power comparison unit is used to compare the total vehicle power with the maximum output power to obtain a third comparison result;

[0158] The first power adjustment unit is used to reduce the real-time maximum charging power to obtain the current change value corresponding to the power battery if the third comparison result is that the vehicle power is greater than the maximum output power.

[0159] Furthermore, the power regulation module 30 also includes:

[0160] The second power comparison unit is used to determine whether the adjusted vehicle power is greater than the maximum output power when the real-time maximum charging power decreases to 0.

[0161] The second power adjustment unit is used to reduce the pedal power request if it is determined that the adjusted vehicle power is greater than the maximum output power, so that the range extender can prioritize providing current to the battery heating module in the vehicle to adjust the temperature of the power battery.

[0162] In addition, this application also provides a terminal device having a battery temperature regulation program that can run on a processor. When the terminal device executes the battery temperature regulation program, it implements the steps of the battery temperature regulation method as described in any of the above embodiments.

[0163] The specific embodiments of the terminal device in this application are basically the same as the embodiments of the battery temperature regulation method described above, and will not be repeated here.

[0164] In addition, this application also provides a computer-readable storage medium storing a battery temperature regulation program, which, when executed by a processor, implements the steps of the battery temperature regulation method as described in any of the above embodiments.

[0165] The specific embodiments of the computer-readable storage medium of this invention are basically the same as the embodiments of the temperature regulation method of the battery described above, and will not be repeated here.

[0166] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0167] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0168] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, including several instructions to cause a terminal device (which can be a device that executes the battery temperature regulation method of this application, specifically a vehicle or a vehicle-mounted system, battery management system, mobile terminal, data storage control terminal, PC, etc. connected to the vehicle) to execute the methods described in the various embodiments of this application.

[0169] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for regulating the temperature of a battery, characterized in that, The battery temperature regulation method includes the following steps: The system detects the real-time remaining charge of the vehicle's power battery and determines whether the real-time remaining charge is less than a preset charge threshold. If it is determined that the real-time remaining power is less than the power threshold, the range extender in the vehicle is activated, and the maximum output power of the range extender and the real-time maximum charging power of the power battery are determined. Calculate the vehicle's overall power, and adjust the real-time maximum charging power based on the vehicle's overall power to obtain the current change value corresponding to the power battery. The step of adjusting the real-time maximum charging power based on the vehicle's overall power to obtain the current change value corresponding to the power battery includes: The vehicle power is compared with the maximum output power to obtain a third comparison result; if the third comparison result is that the vehicle power is greater than the maximum output power, the real-time maximum charging power is reduced to obtain the current change value corresponding to the power battery. The range extender adjusts the current generated based on the current change value so that it prioritizes supplying current to the battery heating module in the vehicle, thereby regulating the temperature of the power battery. Adjusting the current generated by the range extender includes reducing the current value input to the power battery.

2. The battery temperature regulation method as described in claim 1, characterized in that, The step of determining the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery includes: Detect the engine coolant temperature corresponding to the engine in the vehicle; The maximum output power of the range extender is determined based on the engine coolant temperature.

3. The battery temperature regulation method as described in claim 1, characterized in that, The step of determining the maximum output power corresponding to the range extender and the real-time maximum charging power corresponding to the power battery further includes: Detect the real-time battery temperature corresponding to the power battery; The real-time maximum charging power of the power battery is determined based on the real-time battery temperature.

4. The battery temperature regulation method as described in claim 3, characterized in that, The step of determining the real-time maximum charging power of the power battery based on the real-time battery temperature includes: Obtain a preset temperature-power curve, wherein the temperature-power curve includes each standard battery temperature and the standard charging power of the power battery at each standard battery temperature; Based on the real-time battery temperature, the temperature-power curve is queried to determine the target battery temperature that is the same as the real-time battery temperature value among the standard battery temperatures, and the standard charging power corresponding to the target battery temperature is determined as the real-time maximum charging power corresponding to the power battery.

5. The battery temperature regulation method as described in claim 1, characterized in that, The step of calculating the vehicle's overall power also includes: The power consumption of the pedals, battery heating power, and overall vehicle electrical systems of the vehicle are detected. The vehicle power is obtained by summing the pedal power request, the battery heating power, the vehicle electrical power consumption, and the real-time maximum charging power.

6. The battery temperature regulation method as described in claim 5, characterized in that, After the step of adjusting the real-time maximum charging power based on the vehicle power to obtain the current change value corresponding to the power battery, the method further includes: When the real-time maximum charging power decreases to 0, it is determined whether the adjusted vehicle power is greater than the maximum output power. If it is determined that the adjusted vehicle power is greater than the maximum output power, the pedal power request is reduced so that the range extender prioritizes providing current to the battery heating module in the vehicle to regulate the temperature of the power battery.

7. A battery temperature regulation device, characterized in that, The device includes: The power detection module is used to detect the real-time remaining power of the vehicle's power battery and determine whether the real-time remaining power is less than a preset power threshold. The power determination module is used to start the range extender in the vehicle if it is determined that the real-time remaining power is less than the power threshold, and to determine the maximum output power of the range extender and the real-time maximum charging power of the power battery. A power adjustment module is used to calculate the vehicle's overall power and adjust the real-time maximum charging power based on the vehicle's overall power to obtain a current change value corresponding to the power battery. The step of adjusting the real-time maximum charging power based on the vehicle's overall power to obtain the current change value corresponding to the power battery includes: The vehicle power is compared with the maximum output power to obtain a third comparison result; if the third comparison result is that the vehicle power is greater than the maximum output power, the real-time maximum charging power is reduced to obtain the current change value corresponding to the power battery. A temperature regulation module is used to adjust the current generated by the range extender based on the current change value, so that the range extender prioritizes providing current to the battery heating module in the vehicle to regulate the temperature of the power battery, wherein adjusting the current generated by the range extender includes reducing the current value input to the power battery.

8. A terminal device, characterized in that, The terminal device includes: a memory, a processor, and a battery temperature regulation program stored in the memory and executable on the processor, wherein when the battery temperature regulation program is executed by the processor, it implements the steps of the battery temperature regulation method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a battery temperature regulation program, which, when executed by a processor, implements the steps of the battery temperature regulation method as described in any one of claims 1 to 6.

Images