Vehicle battery temperature adjusting method, device, equipment and medium

Abstract

The invention discloses a vehicle battery temperature adjusting method and device, equipment and a medium, and belongs to the technical field of vehicles. The method comprises the following steps: obtaining the residual electric quantity and temperature of a battery; according to the residual electric quantity, a starting heating temperature threshold value and a closing heating temperature threshold value are determined, the starting heating temperature threshold value is smaller than the closing heating temperature threshold value, and the starting heating temperature threshold value and the closing heating temperature threshold value are both in negative correlation with the residual electric quantity; if the temperature is smaller than the starting heating temperature threshold value, controlling a positive temperature coefficient heater to heat the battery; and if the temperature is greater than the heating closing temperature threshold, controlling the positive temperature coefficient heater to stop heating the battery. According to the method, the performance of the battery is ensured by using less positive temperature coefficient heater, so that the energy consumption is reduced, and the cruising ability of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, device, equipment and medium for regulating vehicle battery temperature. Background Art

[0002] Battery performance degrades in low-temperature environments due to factors such as slower chemical reaction rates, increased electrolyte viscosity, lithium deposition, and increased self-discharge. Pure electric vehicles and extended-range electric vehicles typically use PTC (Positive Temperature Coefficient) heaters to quickly heat batteries at low temperatures and improve performance.

[0003] In the prior art, the optimal temperature of the battery is determined based on the relationship between battery temperature and discharge power. When the actual battery temperature is lower than the optimal temperature, the PCT heater is activated to heat the battery to ensure that the discharge power meets the requirements.

[0004] PTC heaters offer the advantages of rapid heating, a simple structure, and low cost. However, they also suffer from high energy consumption. For example, a 7kW PTC heater operating at full power for one hour consumes 7kWh of electricity. Whether in a pure electric vehicle or a range-extended electric vehicle, these battery temperature regulation methods consume significant power, ultimately impacting battery life. Summary of the Invention

[0005] In view of the above problems, the present application is proposed to provide a vehicle battery temperature regulation method, device, equipment and medium for solving the above problems. The temperature threshold for starting and shutting down the positive temperature coefficient heater can be determined according to the remaining power of the battery. The higher the remaining power, the lower the corresponding temperature threshold. When the remaining power is high but the battery temperature is not particularly low, that is, when the battery performance is not very poor, the battery will not be heated. The battery will only be heated when the discharge performance of the battery is poor. The use time of the positive temperature coefficient heater can be reduced, thereby reducing energy consumption and improving the vehicle's endurance.

[0006] In a first aspect, the present application provides a method for regulating the temperature of a vehicle battery, the method comprising:

[0007] Get the remaining battery power and temperature;

[0008] determining a heating start temperature threshold and a heating stop temperature threshold according to the remaining power, wherein the heating start temperature threshold is lower than the heating stop temperature threshold, and both the heating start temperature threshold and the heating stop temperature threshold are negatively correlated with the remaining power;

[0009] If the temperature is lower than the start-up heating temperature threshold, controlling the positive temperature coefficient heater to heat the battery;

[0010] If the temperature is greater than the heating-off temperature threshold, the positive temperature coefficient heater is controlled to stop heating the battery.

[0011] Optionally, controlling the positive temperature coefficient heater to heat the battery includes:

[0012] Obtaining the traffic status of the road section where the vehicle is located, wherein the traffic status includes a congested state and a smooth state;

[0013] determining a target power of the positive temperature coefficient heater according to the traffic state;

[0014] The positive temperature coefficient heater is controlled to heat the battery at the target power.

[0015] Optionally, determining the target power of the positive temperature coefficient heater according to the traffic state includes:

[0016] If the traffic state is a congested state, determining the target power of the positive temperature coefficient heater to be a first power;

[0017] If the traffic state is unobstructed, the vehicle speed and accelerator pedal opening of the vehicle are acquired, and the target power of the positive temperature coefficient heater is determined according to the vehicle speed and the accelerator pedal opening.

[0018] Optionally, determining the target power of the positive temperature coefficient heater according to the vehicle speed and the accelerator pedal opening includes:

[0019] determining a vehicle speed interval in which the vehicle speed falls and an opening interval in which the accelerator pedal opening falls;

[0020] determining a target power of the positive temperature coefficient heater according to the vehicle speed range, the opening range, and a preset correspondence;

[0021] The corresponding relationship is the relationship between the vehicle speed range, the opening range and the target power.

[0022] Optionally, the vehicle speed interval includes a low speed interval, a medium speed interval, and a high speed interval, and the corresponding relationship includes:

[0023] In the low speed range, the opening degree of the opening range is positively correlated with the target power.

[0024] Optionally, the vehicle speed range includes a low speed range, a medium speed range, and a high speed range; the opening range includes a low opening range, a medium opening range, and a high opening range; the target power includes a second power, a third power, and a fourth power that increase in sequence; and the corresponding relationship includes:

[0025] If the vehicle speed range is the low speed range and the opening range is the low opening range, the target power is the second power;

[0026] If the vehicle speed range is the low speed range and the opening range is the medium opening range, the target power is the third power;

[0027] If the vehicle speed range is the low speed range and the opening range is the high opening range, the target power is the third power;

[0028] If the vehicle speed range is the medium speed range and the opening range is the low opening range, the target power is the third power;

[0029] If the vehicle speed range is the medium speed range and the opening range is the medium opening range, the target power is the fourth power;

[0030] If the vehicle speed range is the medium speed range and the opening range is the high opening range, the target power is the second power;

[0031] If the vehicle speed range is the high speed range and the opening range is the low opening range, the target power is the fourth power;

[0032] If the vehicle speed range is the high speed range and the opening range is the medium opening range, the target power is the fourth power;

[0033] If the vehicle speed range is the high speed range and the opening range is the high opening range, the target power is the second power;

[0034] The second power is greater than or equal to the first power.

[0035] Optionally, determining a temperature threshold for starting heating and a temperature threshold for stopping heating according to the remaining power includes:

[0036] Determine the power range in which the remaining power falls;

[0037] Determine a heating start temperature threshold and a heating stop temperature threshold corresponding to the power range.

[0038] In a second aspect, the present application provides a device for regulating the temperature of a vehicle battery, the device comprising:

[0039] Acquisition module, used to obtain the remaining power and temperature of the battery;

[0040] a determination module, configured to determine, based on the remaining power, a heating start temperature threshold and a heating stop temperature threshold, wherein the heating start temperature threshold is lower than the heating stop temperature threshold, and both the heating start temperature threshold and the heating stop temperature threshold are negatively correlated with the remaining power;

[0041] a first control module, configured to control a positive temperature coefficient heater to heat the battery if the temperature is less than the start-heating temperature threshold;

[0042] The second control module is configured to control the positive temperature coefficient heater to stop heating the battery if the temperature is greater than the heating shutdown temperature threshold.

[0043] In a third aspect, the present application provides an electronic device comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the method described in the first aspect by executing the computer instructions.

[0044] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method described in the first aspect.

[0045] The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0046] The embodiments of the present application provide a method, apparatus, device, and medium for regulating the temperature of a vehicle battery. The method obtains the remaining power and temperature of the battery; determines a heating start temperature threshold and a heating stop temperature threshold based on the remaining power, wherein the heating start temperature threshold is less than the heating stop temperature threshold, and both the heating start temperature threshold and the heating stop temperature threshold are negatively correlated with the remaining power, so that the heating start temperature threshold and the heating stop temperature threshold change with the remaining power; if the temperature is less than the heating start temperature threshold, it means that the battery temperature is low at the current remaining power and the battery performance cannot meet the requirements, and then the positive temperature coefficient heater is controlled to heat the battery; if the temperature is greater than the heating stop temperature threshold, it means that the battery temperature is high enough at the current remaining power and the battery performance can meet the requirements, and then the positive temperature coefficient heater is controlled to stop heating the battery. The method can determine the temperature threshold for starting and stopping the positive temperature coefficient heater based on the remaining power of the battery, and the higher the remaining power, the lower the temperature threshold. When the remaining power is high but the battery temperature is not particularly low, that is, when the battery performance is not very poor, the battery will not be heated. The battery will only be heated when the battery performance is poor, which can reduce the use time of the positive temperature coefficient heater, thereby reducing energy consumption and improving the vehicle's endurance.

[0047] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0049] Figure 1 This is a flow chart of a method for regulating vehicle battery temperature provided in an embodiment of the present application;

[0050] Figure 2 This is a relationship diagram of the SOC, temperature, and discharge power of a battery provided in an embodiment of the present application;

[0051] Figure 3 This is a schematic diagram of the operating temperature range of a positive temperature coefficient heater provided in an embodiment of the present application;

[0052] Figure 4 This is a schematic diagram of the structure of a neural network model provided in an embodiment of the present application;

[0053] Figure 5 This is a structural block diagram of a vehicle battery temperature regulating device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0055] Figure 1 This is a flow chart of a method for regulating vehicle battery temperature provided by an embodiment of the present application, such as Figure 1 As shown, the method includes:

[0056] Step S110: Obtain the remaining battery power and temperature of the battery.

[0057] In the embodiment of the present application, not only the temperature of the battery affects the performance of the battery, but the remaining power of the battery also affects the performance of the battery. Figure 2 This is a relationship diagram of the SOC, temperature and discharge power of a battery provided in an embodiment of the present application. Figure 2 Taking the discharge power of a lithium iron phosphate battery as an example, the optimal battery temperature is around 25°C. As the temperature decreases, the discharge power drops sharply. Furthermore, the state of charge (SOC) also significantly affects the battery's discharge power. The higher the SOC, the greater the discharge power. SOC represents the percentage of the battery's current remaining charge to its total capacity. Therefore, a higher remaining charge results in a higher discharge power and better battery performance.

[0058] Among them, the battery temperature can be collected through a temperature sensor, and the remaining power can be obtained from the battery management system.

[0059] Step S120: Determine a heating start temperature threshold and a heating stop temperature threshold according to the remaining power.

[0060] The heating start temperature threshold is lower than the heating stop temperature threshold.

[0061] In the embodiment of the present application, the higher the remaining power, the better the battery performance, so the starting heating temperature threshold and the closing heating temperature threshold can be set lower, that is, the starting heating temperature threshold and the closing heating temperature threshold are both negatively correlated with the remaining power, so that the heating temperature threshold and the closing heating temperature threshold are not fixed, but change with the change of the remaining power.

[0062] Step S130: If the temperature is lower than the heating start temperature threshold, the positive temperature coefficient heater is controlled to heat the battery.

[0063] In an embodiment of the present application, if the temperature is less than the start-up heating temperature threshold, it indicates that the temperature is already very low at the current remaining power level, the battery performance cannot meet the requirements, and the battery needs to be heated. By controlling the start-up heating temperature threshold that changes with the remaining power level, the battery heating is controlled so that when the remaining power is high and the temperature is extremely low, or when the remaining power is low and the temperature is slightly low, the battery performance cannot meet the requirements and the battery will be heated; when the remaining power is high and the temperature is slightly low, or when the remaining power is low and the temperature is slightly high, or when the remaining power is high and the temperature is high, the battery performance can still meet the requirements and the battery will not be heated. This can not only improve the battery performance, but also, compared to the method of heating when the temperature is below the optimal temperature, it can reduce the operating time of the positive temperature coefficient heater, thereby reducing energy consumption and improving the vehicle's endurance.

[0064] Step S140: If the temperature is greater than the heating shutdown temperature threshold, the positive temperature coefficient heater is controlled to stop heating the battery.

[0065] In the embodiment of the present application, if the temperature is greater than the heating shutdown temperature threshold, it means that the temperature is high under the current remaining power and the battery performance meets the requirements, then the positive temperature coefficient heater is controlled to stop heating the battery.

[0066] Optionally, step S120 includes:

[0067] Determine the power range of the remaining power; determine the starting temperature threshold and the stopping temperature threshold of the heating corresponding to the power range.

[0068] In an embodiment of the present application, the correspondence between the power range and the heating start temperature threshold and the heating shutoff temperature threshold can be pre-calibrated. For example, the remaining power ∈ [first power S2, second power S1], the heating start temperature threshold is T1, and the heating shutoff temperature threshold is T2, that is, heating is performed when the battery temperature is lower than T1, and heating is stopped when it is higher than T2. ​​The remaining power ∈ [third power S3, second power S2], the heating start temperature threshold is T3, and the heating shutoff temperature threshold is T4. The remaining power ∈ [fourth power S4, third power S3], the heating start temperature threshold is T5, and the heating shutoff temperature threshold is T6. The remaining power ∈ [fifth power S5, fourth power S4], the heating start temperature threshold is T7, and the heating shutoff temperature threshold is T8. The remaining power ∈ [sixth power S6, fifth power S5], the heating start temperature threshold is T9, and the heating shutoff temperature threshold is T10. Among them, T1 < T3 < T5 < T7 < T9, T2 < T4 < T6 < T8 < T10.

[0069] For example, S1 is 100% × the total capacity of the battery, S2 is 80% × the total capacity of the battery, S3 is 60% × the total capacity of the battery, S4 is 40% × the total capacity of the battery, S5 is 20% × the total capacity of the battery, and S6 is 0 × the total capacity of the battery. T1 is -5°C, T3 is 0°C, T5 is 5°C, T7 is 10°C, T9 is 15°C, T2 is 0°C, T4 is 5°C, T6 is 10°C, T8 is 15°C, and T10 is 20°C.

[0070] Figure 3 Schematic diagram of the operating temperature range of a positive temperature coefficient heater provided in an embodiment of the present application. Figure 3 As shown, the horizontal axis is the battery temperature, the vertical axis is the SOC, the dark area A is the starting operating temperature range of the positive temperature coefficient heater, the light area B is the stopping operating range of the positive temperature coefficient heater, and the white area C is the temperature adjustment area.

[0071] Optionally, step S130 includes:

[0072] Step S1301: Obtain the traffic status of the road section where the vehicle is located, where the traffic status includes congested state and unobstructed state.

[0073] In the embodiment of the present application, the traffic conditions of the road section on which the vehicle is traveling will affect the power demand of the entire vehicle. For example, in a congested state, the power demand is relatively weak, and in a smooth state, the power demand is relatively strong.

[0074] Step S1302: Determine the target power of the positive temperature coefficient heater according to the traffic status.

[0075] In an embodiment of the present application, the target power of the positive temperature coefficient heater can be adjusted according to the traffic conditions, that is, different traffic conditions correspond to different target powers, so that the battery can meet the power requirements of the vehicle while consuming the least heating energy.

[0076] Optionally, step S1302 includes:

[0077] In the first step, if the traffic state is a congested state, the target power of the positive temperature coefficient heater is determined to be a first power.

[0078] In an embodiment of the present application, if the traffic state is congested, it means that the vehicle speed will not be very high and the power demand of the entire vehicle is very small. The target power of the positive temperature coefficient heater is determined to be a smaller first power, and the first power is less than half of the rated power of the positive temperature coefficient heater.

[0079] In the second step, if the traffic state is unobstructed, the vehicle speed and accelerator pedal opening are obtained, and the target power of the positive temperature coefficient heater is determined according to the vehicle speed and accelerator pedal opening.

[0080] In the embodiment of the present application, if the traffic condition is smooth, it means that the vehicle can travel faster, so the vehicle speed and accelerator pedal opening are obtained to understand the actual speed of the vehicle and the driver's demand for speed, and then the target power of the positive temperature coefficient heater is determined based on the vehicle speed and accelerator pedal opening.

[0081] Optionally, the second step includes:

[0082] A vehicle speed range and an accelerator pedal opening range are determined; and a target power of the positive temperature coefficient heater is determined based on the vehicle speed range, the opening range, and a preset correspondence.

[0083] The corresponding relationship is the relationship between the vehicle speed range, the opening range and the target power.

[0084] In the embodiment of the present application, the correspondence between the vehicle speed range, the opening range and the target power can be pre-calibrated. After the vehicle speed range and the opening range are determined, the target power can be directly found from the correspondence.

[0085] Optionally, the vehicle speed range includes a low speed range, a medium speed range, and a high speed range, and the corresponding relationships include:

[0086] In the low speed range, the opening degree of the opening range is positively correlated with the target power.

[0087] In an embodiment of the present application, when the vehicle speed is in a low-speed range, the overall power demand for the battery is low due to the low speed of the vehicle. Therefore, when the overall power demand is low, the greater the accelerator pedal opening, the greater the driver's power demand, and the faster the battery temperature can be increased. Therefore, the target power can also be correspondingly larger.

[0088] Optionally, the vehicle speed range includes a low speed range, a medium speed range, and a high speed range, the opening range includes a low opening range, a medium opening range, and a high opening range, and the target power includes a second power, a third power, and a fourth power that increase in sequence, and the corresponding relationship includes:

[0089] If the vehicle speed interval is a low speed interval and the opening interval is a low opening interval, the target power is the second power;

[0090] If the vehicle speed range is the low speed range and the opening range is the medium opening range, the target power is the third power;

[0091] If the vehicle speed range is the low speed range and the opening range is the high opening range, the target power is the third power;

[0092] If the vehicle speed range is the medium speed range and the opening range is the low opening range, the target power is the third power;

[0093] If the vehicle speed range is the medium speed range and the opening range is the medium opening range, the target power is the fourth power;

[0094] If the vehicle speed range is the medium speed range and the opening range is the high opening range, the target power is the second power;

[0095] If the vehicle speed range is the high speed range and the opening range is the low opening range, the target power is the fourth power;

[0096] If the vehicle speed range is the high speed range and the opening range is the medium opening range, the target power is the fourth power;

[0097] If the vehicle speed range is the high speed range and the opening range is the high opening range, the target power is the second power.

[0098] Among them, the second power is greater than or equal to the first power, the vehicle speed in the low speed range is less than the vehicle speed in the medium speed range, the vehicle speed in the medium speed range is less than the vehicle speed in the high speed range, the opening in the low opening range is less than the opening in the medium opening range, and the opening in the medium opening range is less than the opening in the high opening range.

[0099] In the embodiment of the present application, the corresponding relationship table of vehicle speed range, opening range and target power is as follows:

[0100] Table 1

[0101]

[0102] Step S1303: Control the positive temperature coefficient heater to heat the battery at the target power.

[0103] In the embodiment of the present application, after the target power is determined, the positive temperature coefficient heater is controlled to heat the battery at the target power, so that the battery can be heated as required.

[0104] For example, when a vehicle is traveling on congested urban roads, the driver's demand for battery power is generally low, and the PTC outputs a smaller first power when the battery is heated. When the vehicle is traveling on suburban / elevated roads, there are more accelerations and decelerations, and the driver's accelerator pedal opening is in the medium opening range. During heating, the PTC needs to use a larger target power to quickly increase the battery temperature, thereby increasing the battery's output power. If the vehicle speed is in the medium speed range or high speed range, and the driver has a high power demand, that is, when the accelerator pedal opening is in the high opening range, the PTC's target power is actively reduced to the second power, reducing the PTC's energy consumption so that the battery can provide more driving power to the vehicle. When the vehicle is traveling on a highway with a high speed and frequent overtaking, the PTC's target power is large to quickly increase the battery temperature, thereby increasing the output power. At the same time, when the opening range is in the high opening range, the PTC's target power is actively reduced to increase the available driving power and improve power performance.

[0105] The method of the embodiment of the present application dynamically adjusts the heating / shutdown temperature threshold of the PTC according to the battery SOC / temperature characteristics, effectively saving unnecessary consumption; at the same time, according to traffic congestion, accelerator pedal opening and vehicle speed, the target power of the PTC is intelligently and dynamically output, reducing consumption while improving the vehicle's power performance when the battery has high power requirements.

[0106] In the embodiment of the present application, a neural network model can also be constructed. Figure 4 This is a structural diagram of a neural network model provided in an embodiment of the present application. Figure 4 As shown in the figure, the neural network model includes an input layer 1, a hidden layer 2, and an output layer 3. The remaining battery a, temperature b, traffic status c, vehicle speed d, and accelerator pedal opening e are used as inputs to the neural network model, and whether the positive temperature coefficient heater is heating the battery (active output for heating and off output for non-heating) and the target heating power p are used as outputs of the neural network model.

[0107] Before the remaining power a, temperature b, traffic status c, vehicle speed d, and accelerator pedal opening e are input into the neural network model, normalization processing is required to eliminate the influence of different parameter dimensions and orders of magnitude on the results. The normalization processing formula (1) is as follows:

[0108]

[0109] Among them, x nor is the normalized value, x is the value before processing, and x max is the maximum value of a parameter before processing, x min The minimum value of a parameter before processing.

[0110] The input layer reads the normalized data and passes it to the hidden layer. The calculation results of each neuron in the hidden layer are expressed as formula (2):

[0111]

[0112] Among them, g Hid is the activation function of the hidden layer, y In and y Hid is the output of each neuron in the input layer and hidden layer, y In That is, the normalized value x nor , w Hid and b Hid is the network weight of the hidden layer, 0≤w Hid ≤1 and 0≤b Hid ≤1, n is the number of neurons in the input layer.

[0113] The calculation relationship formula (3) from the hidden layer to the output layer is:

[0114]

[0115] Among them, g Out is the activation function of the output layer, y Out is the output of the output layer neurons, namely p, off and active, w Out and b Out is the network weight of the hidden layer, 0≤w Out ≤1 and 0≤b Out ≤1, m is the number of neurons in the hidden layer.

[0116] Based on the same application concept, an embodiment of the present invention further provides a vehicle battery temperature regulating device. Figure 5 This is a structural block diagram of a vehicle battery temperature regulating device provided in an embodiment of the present application, such as Figure 5 As shown, the apparatus 500 includes an acquisition module 501 , a determination module 502 , a first control module 503 and a second control module 504 .

[0117] An acquisition module 501 is used to obtain the remaining power and temperature of the battery;

[0118] A determination module 502 is configured to determine a heating start temperature threshold and a heating stop temperature threshold based on the remaining power, wherein the heating start temperature threshold is lower than the heating stop temperature threshold, and both the heating start temperature threshold and the heating stop temperature threshold are negatively correlated with the remaining power;

[0119] A first control module 503 is configured to control a positive temperature coefficient heater to heat the battery if the temperature is lower than a heating start temperature threshold;

[0120] The second control module 504 is configured to control the positive temperature coefficient heater to stop heating the battery if the temperature is greater than a heating shutdown temperature threshold.

[0121] Optionally, the first control module 503 includes:

[0122] An acquisition unit, used to acquire the traffic status of the road section where the vehicle is located, the traffic status including congestion status and unobstructed status;

[0123] a determination unit, configured to determine a target power of the positive temperature coefficient heater according to a traffic state;

[0124] The control unit is used to control the positive temperature coefficient heater to heat the battery at a target power.

[0125] Optionally, the determining unit includes:

[0126] a first determining subunit, configured to determine the target power of the positive temperature coefficient heater to be a first power if the traffic state is a congested state;

[0127] The second determining subunit is configured to obtain the vehicle speed and accelerator pedal opening of the vehicle if the traffic state is unobstructed, and determine the target power of the positive temperature coefficient heater according to the vehicle speed and accelerator pedal opening.

[0128] Optionally, the second determining subunit is further configured to:

[0129] Determine a vehicle speed range and an accelerator pedal opening range;

[0130] Determine the target power of the positive temperature coefficient heater according to the vehicle speed range, the opening range and the preset correspondence;

[0131] The corresponding relationship is the relationship between the vehicle speed range, the opening range and the target power.

[0132] Optionally, the vehicle speed range includes a low speed range, a medium speed range, and a high speed range, and the corresponding relationships include:

[0133] In the low speed range, the opening degree of the opening range is positively correlated with the target power.

[0134] Optionally, the vehicle speed range includes a low speed range, a medium speed range, and a high speed range, the opening range includes a low opening range, a medium opening range, and a high opening range, and the target power includes a second power, a third power, and a fourth power that increase in sequence, and the corresponding relationship includes:

[0135] If the vehicle speed interval is a low speed interval and the opening interval is a low opening interval, the target power is the second power;

[0136] If the vehicle speed range is the low speed range and the opening range is the medium opening range, the target power is the third power;

[0137] If the vehicle speed range is the low speed range and the opening range is the high opening range, the target power is the third power;

[0138] If the vehicle speed range is the medium speed range and the opening range is the low opening range, the target power is the third power;

[0139] If the vehicle speed range is the medium speed range and the opening range is the medium opening range, the target power is the fourth power;

[0140] If the vehicle speed range is the medium speed range and the opening range is the high opening range, the target power is the second power;

[0141] If the vehicle speed range is the high speed range and the opening range is the low opening range, the target power is the fourth power;

[0142] If the vehicle speed range is the high speed range and the opening range is the medium opening range, the target power is the fourth power;

[0143] If the vehicle speed range is a high speed range and the opening range is a high opening range, the target power is the second power;

[0144] The second power is greater than or equal to the first power.

[0145] Optionally, the determining module 502 is further configured to:

[0146] Determine the power range of the remaining power;

[0147] Determine the heating start temperature threshold and heating stop temperature threshold corresponding to the power range.

[0148] It can be understood that the device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0149] An embodiment of the present invention further provides an electronic device, which may include a processor and a memory, wherein the processor and the memory may be communicatively connected to each other via a bus or other means.

[0150] The processor may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application, or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above chips.

[0151] The memory may include a large capacity memory for data or instructions. By way of example and not limitation, the memory may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include removable or non-removable (or fixed) media. Where appropriate, the memory may be internal or external to the electronic device. In certain embodiments, the memory may be a non-volatile solid-state memory.

[0152] In one embodiment, the memory may be a read-only memory (ROM). In one embodiment, the ROM may be a mask-programmable ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0153] The processor implements any one of the vehicle battery temperature adjustment methods in the above embodiments by reading and executing computer program instructions stored in the memory.

[0154] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus and communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or devices in the embodiments of this application. Where appropriate, the bus may include one or more buses.

[0155] In addition, in conjunction with the vehicle battery temperature adjustment method in the above-mentioned embodiments, embodiments of the present invention may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when executed by a processor, the computer program instructions implement any of the vehicle battery temperature adjustment methods in the above-mentioned embodiments.

[0156] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD). The storage medium can also include a combination of the above-mentioned types of memory.

[0157] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0158] The embodiments of the present application provide a vehicle battery temperature adjustment method, device, equipment, and medium, which obtain the remaining power and temperature of the battery; determine a start-up heating temperature threshold and a stop-heating temperature threshold based on the remaining power, wherein the start-up heating temperature threshold is less than the stop-heating temperature threshold, and both the start-up heating temperature threshold and the stop-heating temperature threshold are negatively correlated with the remaining power, so that the start-up heating temperature threshold and the stop-heating temperature threshold change with the change of the remaining power; if the temperature is less than the start-up heating temperature threshold, it means that the battery temperature is low at the current remaining power and the battery performance cannot meet the requirements, and then the positive temperature coefficient heater is controlled to heat the battery; if the temperature is greater than the stop-heating temperature threshold, it means that the battery temperature is high enough at the current remaining power and the battery performance can meet the requirements, and then the positive temperature coefficient heater is controlled to stop heating the battery. The method can determine the temperature threshold for starting and stopping the positive temperature coefficient heater based on the remaining power of the battery, and the higher the remaining power, the lower the corresponding temperature threshold. When the remaining power is high but the battery temperature is not particularly low, that is, when the battery performance is not very poor, the battery will not be heated. The battery will only be heated when the battery performance is poor, which can reduce the use time of the positive temperature coefficient heater and thus reduce energy consumption.

[0159] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0160] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0161] It should be noted that the above embodiments illustrate rather than limit the invention, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

Claims

1. A method for regulating vehicle battery temperature, characterized in that: The method comprises: Get the remaining battery power and temperature; determining a heating start temperature threshold and a heating stop temperature threshold according to the remaining power, wherein the heating start temperature threshold is lower than the heating stop temperature threshold, and both the heating start temperature threshold and the heating stop temperature threshold are negatively correlated with the remaining power; If the temperature is lower than the start-up heating temperature threshold, controlling the positive temperature coefficient heater to heat the battery; If the temperature is greater than the heating-off temperature threshold, the positive temperature coefficient heater is controlled to stop heating the battery.

2. The method for adjusting the vehicle battery temperature according to claim 1, characterized in that: The controlling the positive temperature coefficient heater to heat the battery includes: Obtaining the traffic status of the road section where the vehicle is located, wherein the traffic status includes a congested state and a smooth state; determining a target power of the positive temperature coefficient heater according to the traffic state; The positive temperature coefficient heater is controlled to heat the battery at the target power.

3. The method for adjusting the vehicle battery temperature according to claim 2, characterized in that: The determining the target power of the positive temperature coefficient heater according to the traffic state includes: If the traffic state is a congested state, determining the target power of the positive temperature coefficient heater to be a first power; If the traffic state is unobstructed, the vehicle speed and accelerator pedal opening of the vehicle are acquired, and the target power of the positive temperature coefficient heater is determined according to the vehicle speed and the accelerator pedal opening.

4. The method for adjusting the vehicle battery temperature according to claim 3, characterized in that: The determining the target power of the positive temperature coefficient heater according to the vehicle speed and the accelerator pedal opening includes: determining a vehicle speed interval in which the vehicle speed falls and an opening interval in which the accelerator pedal opening falls; determining a target power of the positive temperature coefficient heater according to the vehicle speed range, the opening range, and a preset correspondence; The corresponding relationship is the relationship between the vehicle speed range, the opening range and the target power.

5. The method for regulating vehicle battery temperature according to claim 4, characterized in that: The vehicle speed range includes a low speed range, a medium speed range and a high speed range, and the corresponding relationship includes: In the low speed range, the opening degree of the opening range is positively correlated with the target power.

6. The method for regulating vehicle battery temperature according to claim 4, characterized in that: The vehicle speed range includes a low speed range, a medium speed range, and a high speed range; the opening range includes a low opening range, a medium opening range, and a high opening range; the target power includes a second power, a third power, and a fourth power that increase in sequence; and the corresponding relationship includes: If the vehicle speed range is the low speed range and the opening range is the low opening range, the target power is the second power; If the vehicle speed range is the low speed range and the opening range is the medium opening range, the target power is the third power; If the vehicle speed range is the low speed range and the opening range is the high opening range, the target power is the third power; If the vehicle speed range is the medium speed range and the opening range is the low opening range, the target power is the third power; If the vehicle speed range is the medium speed range and the opening range is the medium opening range, the target power is the fourth power; If the vehicle speed range is the medium speed range and the opening range is the high opening range, the target power is the second power; If the vehicle speed range is the high speed range and the opening range is the low opening range, the target power is the fourth power; If the vehicle speed range is the high speed range and the opening range is the medium opening range, the target power is the fourth power; If the vehicle speed range is the high speed range and the opening range is the high opening range, the target power is the second power; The second power is greater than or equal to the first power.

7. The method for regulating vehicle battery temperature according to claim 1, characterized in that: The determining, based on the remaining power, a temperature threshold for starting heating and a temperature threshold for stopping heating, includes: Determine the power range in which the remaining power falls; Determine a heating start temperature threshold and a heating stop temperature threshold corresponding to the power range.

8. A vehicle battery temperature regulating device, characterized in that: The device comprises: Acquisition module, used to obtain the remaining power and temperature of the battery; a determination module, configured to determine, based on the remaining power, a heating start temperature threshold and a heating stop temperature threshold, wherein the heating start temperature threshold is lower than the heating stop temperature threshold, and both the heating start temperature threshold and the heating stop temperature threshold are negatively correlated with the remaining power; a first control module, configured to control a positive temperature coefficient heater to heat the battery if the temperature is less than the start-heating temperature threshold; The second control module is configured to control the positive temperature coefficient heater to stop heating the battery if the temperature is greater than the heating shutdown temperature threshold.

9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method according to any one of claims 1 to 7.

Images