Battery thermal management method and system and storage medium

Abstract

The invention discloses a battery thermal management method, device and system, which are used for improving the charging performance and efficiency of an automobile battery. The method comprises the following steps: in a vehicle driving process, acquiring current position information, destination information and current electric quantity of a vehicle, and judging whether the vehicle has a charging demand after arriving at a destination; when the vehicle needs to be charged, the remaining endurance mileage of the vehicle is compared with the current distance from the destination; when the remaining endurance mileage of the vehicle is greater than the current distance from the destination, judging whether the battery temperature when the vehicle arrives at the destination is greater than the initial temperature required by quick charging of the battery or not; and when the temperature of the battery when the vehicle arrives at the destination is smaller than the initial temperature required for quick charging of the battery, it is determined that the battery needs to be additionally heated. By adopting the scheme, the charging performance and efficiency of the automobile battery in a low-temperature environment can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery thermal management, and particularly relates to a battery thermal management method, system and storage medium. Background Art

[0002] Under the background of the booming development of the current automotive industry, automotive battery charging technology has always been one of the core fields that has received much attention. When an automotive battery is charging, there is a necessary prerequisite, that is, the minimum temperature condition required for charging must be met before the charging process can be smoothly started. In terms of the current existing technical situation, a vehicle usually judges whether the battery temperature reaches the minimum temperature required for charging after receiving a charging instruction. However, when the vehicle is charging in a low-temperature environment, the actual situation is often not satisfactory. Due to the influence of the low-temperature environment, the battery temperature generally fails to meet the minimum temperature standard required for charging. In such a situation, in order to ensure that the charging process can be carried out safely and effectively, it is necessary to first heat up the battery and then the charging can officially start.

[0003] This current situation inevitably brings a series of negative impacts. On the one hand, it significantly prolongs the charging time of users and causes many inconveniences to users' daily use; on the other hand, the charging efficiency is also greatly reduced, which not only wastes valuable energy resources but also restricts the popularization and promotion of electric vehicles to a certain extent. Therefore, there is an urgent need to develop an innovative technology to effectively solve the above problems and improve the charging performance and efficiency of automotive batteries in low-temperature environments. Summary of the Invention

[0004] The present application provides a battery thermal management method, system and storage medium for improving the charging performance and efficiency of automotive batteries in low-temperature environments.

[0005] The present application provides a battery thermal management method, including:

[0006] During the driving process of the vehicle, obtain the current position information, destination information and current battery power of the vehicle;

[0007] Judge whether there is a charging requirement after the vehicle reaches the destination according to the current position information, destination information and current battery power of the vehicle;

[0008] When the vehicle has a charging requirement, determine the remaining driving range of the vehicle according to the vehicle battery power, and determine the current distance to the destination;

[0009] Compare the remaining driving range of the vehicle with the current distance to the destination;

[0010] When the remaining driving range of the vehicle is greater than the current distance to the destination, determine the battery temperature when the vehicle reaches the destination;

[0011] Determine whether the battery temperature when the vehicle arrives at the destination is greater than the starting temperature required for fast charging of the battery;

[0012] When the battery temperature when the vehicle arrives at the destination is less than the starting temperature required for fast charging of the battery, it is determined that the battery needs to be additionally heated so that the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast charging of the battery.

[0013] The beneficial effects of the present application are as follows: During the driving process of the vehicle, obtain the current position information, destination information, and current battery power of the vehicle, and determine whether there is a charging requirement after the vehicle arrives at the destination. When the vehicle has a charging requirement, determine the remaining cruising range of the vehicle according to the vehicle battery power, and determine the current distance to the destination; when the remaining cruising range of the vehicle is greater than the current distance to the destination, determine the battery temperature when the vehicle arrives at the destination; when the battery temperature when the vehicle arrives at the destination is less than the starting temperature required for fast charging of the battery, it is determined that the battery needs to be additionally heated so that the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast charging of the battery. Since the temperature of the battery when arriving at the destination can reach the starting temperature required for fast charging, the requirement for fast charging at low temperature is met, the battery charging time is shortened, and the charging performance and efficiency of the vehicle battery in a low-temperature environment are improved.

[0014] In one embodiment, the method further includes:

[0015] When the vehicle has no charging requirement, determine the optimal target temperature of the battery according to the current ambient temperature, and obtain the battery balance temperature that meets the basic power performance requirement at low temperature;

[0016] Determine that the set value of the battery temperature is the maximum value between the optimal target temperature and the battery balance temperature that meets the basic power performance requirement.

[0017] In one embodiment, the method further includes:

[0018] When the remaining cruising range of the vehicle is less than the current distance to the destination, send a reminder message that the power is insufficient to reach the destination.

[0019] In one embodiment, the method further includes:

[0020] When the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast charging of the battery, determine that the battery does not need to be additionally heated.

[0021] In one embodiment, the method further includes:

[0022] When it is determined that the battery needs to be additionally heated, calculate the heating power required for additionally heating the battery;

[0023] Determine that the sum of the heating power required for additional heating of the battery and the driving power required for the vehicle to reach the destination is the total power consumption when the vehicle reaches the destination.

[0024] In one embodiment, calculating the heating power required for additional heating of the battery includes:

[0025] Calculate the heating power required for additional heating of the battery through the following formula:

[0026]

[0027] where SOC Δ is the heating power required for additional heating; C is the battery capacitance; M is the battery mass; T0 fast is the starting temperature of the battery fast charging; T1 is the current temperature of the battery; η is the system heating efficiency; E total is the total battery capacity.

[0028] In one embodiment, the method further includes:

[0029] Compare the current battery power with the total power consumption;

[0030] When the current battery power is greater than or equal to the total power consumption, determine that the target temperature of the battery is the optimal target temperature of the battery;

[0031] When the current battery power is less than the total power consumption, determine that the target temperature of the battery is the starting temperature required for battery fast charging.

[0032] This application also provides a battery thermal management device, including:

[0033] An acquisition module, configured to acquire the current vehicle position information, destination information, and the current battery power of the vehicle during vehicle driving;

[0034] A first determination module, configured to determine whether there is a charging requirement after the vehicle reaches the destination according to the current vehicle position information, destination information, and the current battery power of the vehicle;

[0035] A first determination module, configured to, when the vehicle has a charging requirement, determine the remaining driving range of the vehicle according to the vehicle battery power, and determine the current distance to the destination;

[0036] A comparison module, configured to compare the remaining driving range of the vehicle with the current distance to the destination;

[0037] A second determination module, configured to, when the remaining driving range of the vehicle is greater than the current distance to the destination, determine the battery temperature when the vehicle reaches the destination;

[0038] A second determination module, configured to determine whether the battery temperature when the vehicle arrives at the destination is greater than the starting temperature required for fast battery charging;

[0039] A third determination module, configured to determine that additional heating of the battery is required when the battery temperature when the vehicle arrives at the destination is less than the starting temperature required for fast battery charging, so that the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast battery charging.

[0040] In one embodiment, the device further includes:

[0041] A fourth determination module, configured to determine an optimal target temperature of the battery according to the current ambient temperature when the vehicle has no charging requirement, and obtain a battery balance temperature that meets the basic power performance requirement at low temperatures;

[0042] A fifth determination module, configured to determine that the set value of the battery temperature is the maximum value between the optimal target temperature and the battery balance temperature that meets the basic power performance requirement.

[0043] In one embodiment, the device further includes:

[0044] A reminder module, configured to send a reminder message that the power is insufficient to reach the destination when the remaining driving range of the vehicle is less than the current distance to the destination.

[0045] In one embodiment, the device further includes:

[0046] When the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast battery charging, it is determined that the battery does not require additional heating.

[0047] In one embodiment, the method further includes:

[0048] A calculation module, configured to calculate the heating power required for additional heating of the battery when it is determined that additional heating of the battery is required;

[0049] A sixth determination module, configured to determine that the sum of the heating power required for additional heating of the battery and the driving power required for the vehicle to reach the destination is the total power consumption when the vehicle arrives at the destination.

[0050] In one embodiment, the calculation module is configured to:

[0051] Calculate the heating power required for additional heating of the battery through the following formula:

[0052]

[0053] where SOC ΔThe heating power required for additional heating; C is the battery capacitance; M is the battery mass; T0 fast is the starting temperature for fast charging of the battery; T1 is the current temperature of the battery; η is the system heating efficiency; E total is the total battery capacity.

[0054] In one embodiment, the device further includes:

[0055] A comparison module for comparing the current battery power with the total power consumption;

[0056] A seventh determination module for determining that the target temperature of the battery is the optimal target temperature of the battery when the current battery power is greater than or equal to the total power consumption;

[0057] An eighth determination module for determining that the target temperature of the battery is the starting temperature required for fast charging of the battery when the current battery power is less than the total power consumption.

[0058] This application also provides a battery thermal management system, including:

[0059] At least one processor; and,

[0060] A memory communicatively connected to the at least one processor; wherein,

[0061] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the battery thermal management method described in any of the above embodiments.

[0062] This application also provides a computer-readable storage medium, and when the instructions in the storage medium are executed by the processor corresponding to the battery thermal management system, the battery thermal management system can implement the battery thermal management method described in any of the above embodiments.

[0063] Other features and advantages of this application will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing this application. The objectives and other advantages of this application can be achieved and obtained by the structures specifically pointed out in the written specification, claims, and drawings.

[0064] Next, through the drawings and embodiments, the technical solutions of this application will be further described in detail. Description of the Drawings

[0065] The drawings are used to provide a further understanding of this application, and constitute a part of the specification. Together with the embodiments of this application, they are used to explain this application and do not constitute a limitation to this application. In the drawings:

[0066] Figure 1Flow chart of a battery thermal management method in an embodiment of the present application;

[0067] Figure 2 Structural schematic diagram of a battery thermal management device in an embodiment of the present application;

[0068] Figure 3 Hardware structural schematic diagram of a battery thermal management system in an embodiment of the present application. Detailed implementation manners

[0069] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0070] Figure 1 Flow chart of a battery thermal management method in an embodiment of the present application, as Figure 1 shown, the method can be implemented as the following steps S101 - S107:

[0071] In step S101, during the vehicle driving process, obtain the vehicle's current location information, destination information, and the vehicle's current battery level;

[0072] In step S102, determine whether there is a charging requirement after the vehicle reaches the destination according to the vehicle's current location information, destination information, and the vehicle's current battery level;

[0073] In step S103, when the vehicle has a charging requirement, determine the remaining driving range of the vehicle according to the vehicle battery level, and determine the current distance to the destination;

[0074] In step S104, compare the remaining driving range of the vehicle with the current distance to the destination;

[0075] In step S105, when the remaining driving range of the vehicle is greater than the current distance to the destination, determine the battery temperature when the vehicle reaches the destination;

[0076] In step S106, determine whether the battery temperature when the vehicle reaches the destination is greater than the starting temperature required for fast charging of the battery;

[0077] In step S107, when the battery temperature when the vehicle reaches the destination is less than the starting temperature required for fast charging of the battery, determine that it is necessary to perform additional heating on the battery so that the battery temperature when the vehicle reaches the destination is greater than or equal to the starting temperature required for fast charging of the battery.

[0078] In this application, during the vehicle's driving process, the vehicle's current location information, destination information, and the vehicle's current battery level are obtained. Specifically, various key information can be obtained by means of the vehicle's built-in high-precision Global Positioning System (GPS) module and in-vehicle sensors. For example, the vehicle's current location can be obtained through the GPS module; the destination information can be obtained through the in-vehicle navigation system based on the destination information pre-entered by the user. In addition, the destination information can also be obtained based on the user's historical driving data. For example, for the user's daily commuting information, the destination information can be determined according to the driving time, current location, etc.; the vehicle's current current can be obtained through the Battery Management System (BMS).

[0079] Based on the vehicle's current location information, destination information, and the vehicle's current battery level, it is determined whether there is a charging requirement after the vehicle reaches the destination. This step can obtain information through interaction with the user and other means to judge the vehicle's charging requirement. In addition, it can also be determined by combining whether the destination is a dedicated charging station, whether the parking lot is equipped with charging facilities, etc. At the same time, considering factors such as the vehicle's current battery level, historical driving data, and road conditions information, the remaining battery level of the vehicle when it reaches the destination is predicted. If the prediction result shows that the remaining battery level of the vehicle is lower than the preset value after reaching the destination, indicating that the current current cannot meet the subsequent travel requirements, then it is determined that there is a charging requirement; on the contrary, if the vehicle's remaining battery level is sufficient to meet the subsequent itinerary arrangement and there is no obvious necessity to charge at the destination, it is determined that there is no charging requirement.

[0080] When the vehicle has a charging requirement, the remaining driving range of the vehicle is determined according to the vehicle's battery level, and the current distance to the destination is determined. For the determination of the vehicle's remaining driving range D1, the system determines it based on the vehicle's battery level and the vehicle's energy consumption model. This energy consumption model comprehensively considers various factors, including the influence of the vehicle's driving speed, road conditions (such as urban roads, highways, mountain roads, etc.), vehicle load, environmental temperature, etc. on energy consumption. By substituting the current battery level into the energy consumption model and dynamically adjusting it in combination with the real-time road conditions information, the system can more accurately estimate the remaining driving range that the vehicle can travel in the current state. And the current distance D2 to the destination is accurately calculated through the vehicle's current location information and destination information by means of a high-precision map or Geographic Information System (GIS).

[0081] The vehicle's remaining driving range is compared with the current distance to the destination. By comparing the vehicle's remaining driving range with the current distance to the destination in real time, it is timely understood whether the vehicle can reach the destination smoothly in the current state.

[0082] When the vehicle's remaining driving range is less than the current distance to the destination, a reminder message that the battery power is insufficient to reach the destination is sent, and the user is recommended to add a charging stop point during the driving.

[0083] When the remaining driving range of the vehicle is greater than the current distance to the destination, determine the battery temperature when the vehicle reaches the destination. When the remaining driving range of the vehicle is greater than the current distance to the destination, it means that the vehicle can reach the destination smoothly. At this time, the system needs to further determine the battery temperature when the vehicle reaches the destination. Specifically, the system first obtains the real-time temperature data of the current battery, and then analyzes and calculates the battery temperature T when the vehicle reaches the destination by combining information such as the driving conditions of the vehicle (such as driving speed, acceleration and deceleration frequency, etc.), ambient temperature, and thermal characteristic model of the battery. d . For example, calculate the battery temperature when the vehicle reaches the destination through the following formula:

[0084] T d = T0 + [(k1·v + k2·a + Q0) - h·(T0 - T env )]×Δt / (M·C);

[0085] Among them, T d is the battery temperature when the vehicle reaches the destination; T0 is the real-time temperature of the current battery; v is the average driving speed; a is the acceleration and deceleration frequency; T env is the ambient temperature; h is the heat dissipation coefficient; C is the battery capacitance; M is the battery mass; Δt is the remaining driving time; k1, k2, Q0 are preset parameters that can be calibrated through experiments.

[0086] Judge whether the battery temperature when the vehicle reaches the destination is greater than the starting temperature required for fast charging of the battery. The starting temperature required for fast charging of the battery is a fixed parameter value determined by the battery manufacturer based on various factors such as the chemical characteristics of the battery, charging safety, and efficiency, and is stored in the vehicle control system. The system directly compares the calculated battery temperature T d when the vehicle reaches the destination with the starting temperature T0 fast required for fast charging of the battery. The system can quickly determine whether the battery meets the initial temperature condition for fast charging in the current situation. If the battery temperature when the vehicle reaches the destination is greater than the starting temperature required for fast charging of the battery, it means that the battery can directly enter the fast charging process, and the battery balance temperature remains unchanged without additional battery heating.

[0087] When the battery temperature when the vehicle reaches the destination is less than the starting temperature required for fast charging of the battery, it is determined that additional heating needs to be performed on the battery so that the battery temperature when the vehicle reaches the destination is greater than or equal to the starting temperature required for fast charging of the battery. When it is determined that additional heating needs to be performed on the battery, calculate the heating power required for additional heating of the battery.

[0088] In an embodiment of the present application, first determine the battery from the current temperature T1 to the fast charging starting temperature T0 through the following formula 1 fastThe required energy

[0089] E battery = C * M * (T0 fast - T1) / η Formula 1;

[0090] where, E battery is the energy required for heating; C is the battery capacitance; M is the battery mass; T0 fast is the starting temperature of the battery's fast charging; T1 is the current temperature of the battery; η is the system heating efficiency.

[0091] Then, calculate the heating power consumption required to heat the battery to the starting temperature of fast charging through the following Formula 2:

[0092] SOC Δ = E battery / E total Formula 2;

[0093] where, SOC Δ is the heating power consumption required for additional heating; E battery is the energy required for heating; E total is the total battery capacity.

[0094] Of course, the heating power consumption required for additional heating of the battery can also be directly calculated through the following formula:

[0095]

[0096] where, SOC Δ is the heating power consumption required for additional heating; C is the battery capacitance; M is the battery mass; T0 fast is the starting temperature of the battery's fast charging; T1 is the current temperature of the battery; η is the system heating efficiency; E total is the total battery capacity.

[0097] After that, determine that the sum of the heating power consumption required for additional heating of the battery and the driving power consumption required for the vehicle to reach the destination is the total power consumption when the vehicle reaches the destination, that is, calculate the total power consumption through the following Formula 3:

[0098] SOC t = SOC Δ + SOC d Formula 3;

[0099] where, SOC t is the total power consumption when the vehicle reaches the destination; SOC Δ is the heating power consumption required for additional heating; SOC d is the proportion of the power consumption of the vehicle's driving in the total battery power without considering the battery heating requirement.

[0100] The above control variables can be updated in real time according to the vehicle and road conditions, ensuring the best overall vehicle endurance under the premise of meeting the user's driving needs, reducing the user's anxiety about the endurance mileage at low temperatures, and improving the power consumption economy at low temperatures.

[0101] Further, compare the current battery power with the total power consumption; when the current battery power is greater than or equal to the total power consumption, it means that the battery has enough power to support adjusting the battery temperature to the optimal target temperature to fully utilize the performance advantages of the battery, such as longer endurance mileage, more stable charge and discharge efficiency, etc. Therefore, determine the target temperature of the battery as the optimal target temperature of the battery; when the current battery power is less than the total power consumption, it indicates that the battery power is relatively tight and cannot meet the power consumption required to heat the battery to the optimal target temperature. To ensure that the vehicle can at least meet the basic charging requirements, therefore, determine the target temperature of the battery as the starting temperature required for fast charging of the battery. This temperature is the minimum temperature requirement to ensure that the battery can be charged at a high charging rate. Although it may not be the optimal temperature for battery performance, in the case of limited power, it prioritizes ensuring that the battery can quickly replenish power to meet the subsequent usage needs of the vehicle.

[0102] In addition, on the basis that the battery temperature reaches the starting temperature required for fast charging of the battery when the vehicle arrives at the destination, to ensure the requirement of a long endurance mileage at low temperatures, the time for battery heating will be postponed to the second half of the journey, that is, the battery heating is turned on after a specific time period, so that the vehicle just meets the fast charging starting temperature requirement when it arrives at the destination. Specifically, the preset information of the vehicle is monitored in real time, where the preset information includes the current temperature of the battery, the remaining power, and the destination information; according to the preset information of the vehicle and the ambient temperature, etc., calculate the time length required to heat the battery to the target temperature; when the time before the vehicle arrives at the destination drops to the time length, turn on the battery heating.

[0103] Of course, when the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast charging of the battery, it is determined that the battery does not require additional heating.

[0104] In addition, in an embodiment of the present application, when the vehicle has no charging requirement, determine the optimal target temperature of the battery according to the current ambient temperature, and obtain the battery balance temperature that meets the basic power performance requirements at low temperatures; determine the set value of the battery temperature as the maximum value of the optimal target temperature and the battery balance temperature that meets the basic power performance requirements. This can not only ensure that the vehicle has enough power to drive normally in a low-temperature environment, but also improve the endurance mileage as much as possible, taking into account the basic performance and energy-saving requirements of the vehicle.

[0105] The beneficial effects of the present application are as follows: During the vehicle driving process, the current position information, destination information, and current battery power of the vehicle are obtained; it is judged whether there is a charging requirement after the vehicle reaches the destination according to the current position information, destination information, and current battery power of the vehicle; when the vehicle has a charging requirement, the remaining driving range of the vehicle is determined according to the vehicle battery power, and the current distance to the destination is determined; the remaining driving range of the vehicle is compared with the current distance to the destination; when the remaining driving range of the vehicle is greater than the current distance to the destination, the battery temperature when the vehicle reaches the destination is determined; it is judged whether the battery temperature when the vehicle reaches the destination is greater than the starting temperature required for fast charging of the battery; when the battery temperature when the vehicle reaches the destination is less than the starting temperature required for fast charging of the battery, it is determined that the battery needs to be additionally heated so that the battery temperature when the vehicle reaches the destination is greater than or equal to the starting temperature required for fast charging of the battery. Since the temperature of the battery when reaching the destination can reach the starting temperature required for fast charging, the demand for fast charging at low temperature is met, the battery charging time is shortened, and the charging performance and efficiency of the vehicle battery in a low-temperature environment are improved.

[0106] In one embodiment, the method can also be implemented as the following steps A1 - A2:

[0107] In step A1, when the vehicle has no charging requirement, the optimal target temperature of the battery is determined according to the current ambient temperature, and the battery balance temperature that meets the basic power performance requirement at low temperature is obtained;

[0108] In step A2, the set value of the battery temperature is determined as the maximum value between the optimal target temperature and the battery balance temperature that meets the basic power performance requirement.

[0109] In this embodiment, when the vehicle has no charging requirement, the optimal target temperature of the battery is determined according to the current ambient temperature, and the battery balance temperature that meets the basic power performance requirement at low temperature is obtained. Among them, the optimal target temperature refers to the battery temperature corresponding to the best comprehensive performance (especially the maximum low-temperature driving range) of the electric vehicle during low-temperature driving under specific environmental conditions, and can be found by methods such as bench tests and simulation calculations to find the battery temperature that can make the vehicle achieve the maximum low-temperature driving range under specific environmental conditions. The battery balance temperature refers to the temperature state when the temperatures of all parts inside the battery tend to be uniform. In a low-temperature environment, the performance of the battery will be inhibited to a certain extent. When the battery temperature is too low, the output power of the battery may not be able to meet the power required for normal vehicle driving. The battery balance temperature that meets the basic power performance requirement is the lowest temperature that ensures the battery can provide sufficient power for the vehicle so that the vehicle can perform normal driving operations such as starting, accelerating, and climbing slopes.

[0110] Determine that the set value of the battery temperature is the maximum of the optimal target temperature and the battery balance temperature that meets the basic power performance requirements. If the user has no low-temperature charging request, only the heating requirements of the passenger compartment and the basic power requirements of the battery need to be considered during the entire driving process. Therefore, if the user has no low-temperature charging request, the battery target temperature T target is set to the optimal target temperature T opt and the battery balance temperature T floor that meets the basic power performance requirements, that is, T target = max(T opt , T floor ). In this way, it can not only ensure that the vehicle has sufficient power to drive normally in a low-temperature environment, but also improve the cruising range as much as possible, taking into account both the basic performance and energy-saving requirements of the vehicle.

[0111] In one embodiment, the method can also be implemented as the following steps:

[0112] When the remaining cruising range of the vehicle is less than the current distance to the destination, send a reminder message that the power is insufficient to reach the destination.

[0113] In one embodiment, the method can also be implemented as the following steps:

[0114] When the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast charging of the battery, it is determined that the battery does not require additional heating.

[0115] In one embodiment, the method can also be implemented as the following steps B1 - B2:

[0116] In step B1, when it is determined that additional heating of the battery is required, calculate the heating power required for additional heating of the battery;

[0117] In step B2, determine that the sum of the heating power required for additional heating of the battery and the driving power required for the vehicle to reach the destination is the total power consumption when the vehicle reaches the destination.

[0118] In one embodiment, step B1 can be implemented as the following steps:

[0119] Calculate the heating power required for additional heating of the battery through the following formula:

[0120]

[0121] where SOC Δ is the heating power required for additional heating; C is the battery capacitance; M is the battery mass; T0 fast is the starting temperature of battery fast charging; T1 is the current temperature of the battery; η is the system heating efficiency; Etotal is the total battery capacity.

[0122] In one embodiment, the method may also be implemented as the following steps C1 - C3:

[0123] In step C1, compare the current battery charge with the total power consumption;

[0124] In step C2, when the current battery charge is greater than or equal to the total power consumption, determine the target temperature of the battery as the optimal target temperature of the battery;

[0125] In step C3, when the current battery charge is less than the total power consumption, determine the target temperature of the battery as the starting temperature required for fast charging of the battery.

[0126] Figure 2 is a schematic structural diagram of a battery thermal management device in an embodiment of the present application, as Figure 2 shown, including:

[0127] An acquisition module 201, configured to acquire the current vehicle position information, destination information, and the current battery charge of the vehicle during the driving of the vehicle;

[0128] A first judgment module 202, configured to judge whether there is a charging requirement after the vehicle arrives at the destination according to the current vehicle position information, destination information, and the current battery charge of the vehicle;

[0129] A first determination module 203, configured to, when the vehicle has a charging requirement, determine the remaining driving range of the vehicle according to the battery charge of the vehicle, and determine the current distance to the destination;

[0130] A comparison module 204, configured to compare the remaining driving range of the vehicle with the current distance to the destination;

[0131] A second determination module 205, configured to, when the remaining driving range of the vehicle is greater than the current distance to the destination, determine the battery temperature when the vehicle arrives at the destination;

[0132] A second judgment module 206, configured to judge whether the battery temperature when the vehicle arrives at the destination is greater than the starting temperature required for fast charging of the battery;

[0133] A third determination module 207, configured to, when the battery temperature when the vehicle arrives at the destination is less than the starting temperature required for fast charging of the battery, determine that the battery needs to be additionally heated so that the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast charging of the battery.

[0134] In one embodiment, the device further includes:

[0135] A fourth determination module, configured to determine an optimal target temperature of the battery according to the current ambient temperature when the vehicle has no charging requirement, and obtain a battery balance temperature that meets the basic power performance requirement at low temperatures;

[0136] A fifth determination module, configured to determine that a set value of the battery temperature is the maximum value between the optimal target temperature and the battery balance temperature that meets the basic power performance requirement.

[0137] In one embodiment, the device further includes:

[0138] A reminder module, configured to send a reminder message that the power is insufficient to reach the destination when the remaining driving range of the vehicle is less than the current distance to the destination.

[0139] In one embodiment, the device further includes:

[0140] When the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for fast charging of the battery, it is determined that the battery does not need additional heating.

[0141] In one embodiment, the method further includes:

[0142] A calculation module, configured to calculate the heating power required for additional heating of the battery when it is determined that additional heating of the battery is required;

[0143] A sixth determination module, configured to determine that the sum of the heating power required for additional heating of the battery and the driving power required for the vehicle to reach the destination is the total power consumption when the vehicle reaches the destination.

[0144] In one embodiment, the calculation module is configured to:

[0145] Calculate the heating power required for additional heating of the battery through the following formula:

[0146]

[0147] where SOC Δ is the heating power required for additional heating; C is the battery capacitance; M is the battery mass; T0 fast is the starting temperature of fast charging of the battery; T1 is the current temperature of the battery; η is the system heating efficiency; E total is the total battery capacity.

[0148] In one embodiment, the device further includes:

[0149] A comparison module, configured to compare the current battery power with the total power consumption;

[0150] A seventh determination module, configured to determine that the target temperature of the battery is the optimal target temperature of the battery when the current battery power is greater than or equal to the total power consumption;

[0151] An eighth determination module, configured to determine that the target temperature of the battery is the starting temperature required for fast charging of the battery when the current battery power is less than the total power consumption.

[0152] Figure 3 It is a schematic diagram of the hardware structure of a battery thermal management system in an embodiment of the present application. As Figure 3 shown, the battery thermal management system includes:

[0153] At least one processor 320; and,

[0154] A memory 304 communicatively connected to the at least one processor 320; wherein,

[0155] The memory 304 stores instructions executable by the at least one processor 320, and the instructions are executed by the at least one processor 320 to implement the battery thermal management method described in any of the above embodiments.

[0156] Referring to Figure 3 , the battery thermal management system 300 may include one or more of the following components: a processing component 302, a memory 304, a power supply component 306, a multimedia component 308, an audio component 310, an input / output (I / O) interface 312, a sensor component 314, and a communication component 316.

[0157] The processing component 302 generally controls the overall operation of the battery thermal management system 300. The processing component 302 may include one or more processors 320 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 302 may include one or more modules to facilitate the interaction between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate the interaction between the multimedia component 308 and the processing component 302.

[0158] The memory 304 is configured to store various types of data to support the operation of the battery thermal management system 300. Examples of these data include instructions for any application or method operating on the battery thermal management system 300, such as text, pictures, videos, etc. The memory 304 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0159] The power supply component 306 provides power for various components of the battery thermal management system 300. The power supply component 306 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the vehicle control system 300.

[0160] The multimedia component 308 includes a screen that provides an output interface between the battery thermal management system 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of the touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operations. In some embodiments, the multimedia component 308 may also include a front camera and / or a rear camera. When the battery thermal management system 300 is in an operation mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0161] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) that is configured to receive external audio signals when the battery thermal management system 300 is in an operation mode, such as an alarm mode, a recording mode, a voice recognition mode, and a voice output mode. The received audio signals can be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 also includes a speaker for outputting audio signals.

[0162] The I / O interface 312 provides an interface between the processing component 302 and a peripheral interface module, and the peripheral interface module can be a keyboard, a click wheel, buttons, etc. These buttons can include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0163] The sensor assembly 314 includes one or more sensors for providing status assessment of various aspects for the battery thermal management system 300. For example, the sensor assembly 314 may include a sound sensor. Additionally, the sensor assembly 314 can detect the on / off state of the battery thermal management system 300, the relative positioning of components, such as components for the display and keypad of the battery thermal management system 300. The sensor assembly 314 can also detect the operating state of the battery thermal management system 300 or components of the battery thermal management system 300, the orientation of the battery thermal management system 300 or acceleration / deceleration, and temperature changes of the battery thermal management system 300. The sensor assembly 314 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 314 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 may further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, and a temperature sensor.

[0164] The communication component 316 is configured to enable the battery thermal management system 300 to provide communication capabilities with other devices and cloud platforms in a wired or wireless manner. The battery thermal management system 300 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0165] In an exemplary embodiment, the battery thermal management system 300 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the battery thermal management method described in any of the above embodiments.

[0166] This application also provides a computer-readable storage medium. When the instructions in the storage medium are executed by a processor corresponding to the battery thermal management system, the battery thermal management system can implement the battery thermal management method described in any of the above embodiments.

[0167] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0168] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0169] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0170] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0171] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A battery thermal management method, characterized in that: include: During the driving process of the vehicle, obtain the vehicle's current location information, destination information and the vehicle's current power; Determine whether the vehicle needs to be charged after arriving at the destination based on the vehicle's current location information, destination information, and the vehicle's current power level; When the vehicle needs to be charged, the remaining range of the vehicle is determined based on the battery power of the vehicle, and the current distance to the destination is determined; Compare the vehicle's remaining range with the current distance to the destination; When the remaining cruising range of the vehicle is greater than the current distance to the destination, determining the battery temperature when the vehicle arrives at the destination; Determine whether the battery temperature when the vehicle arrives at the destination is greater than the starting temperature required for battery fast charging; When the battery temperature when the vehicle arrives at the destination is lower than the starting temperature required for battery fast charging, it is determined that the battery needs to be additionally heated so that the battery temperature when the vehicle arrives at the destination is higher than or equal to the starting temperature required for battery fast charging.

2. The method according to claim 1, characterized in that The method further comprises: When the vehicle has no charging demand, the optimal target temperature of the battery is determined according to the current ambient temperature, and the battery balance temperature that meets the basic power requirements at low temperatures is obtained; The set value of the battery temperature is determined to be the maximum value between the optimal target temperature and the battery balance temperature that meets the basic power demand.

3. The method according to claim 1, characterized in that The method further comprises: When the vehicle's remaining range is less than the current distance to the destination, a reminder message is sent that the battery is insufficient to reach the destination.

4. The method according to claim 1, characterized in that The method further comprises: When the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for battery fast charging, it is determined that the battery does not require additional heating.

5. The method according to claim 1, characterized in that The method further comprises: When it is determined that the battery needs to be additionally heated, calculating the amount of heating power required for the additional heating of the battery; The sum of the heating power required for additionally heating the battery and the driving power required for the vehicle to reach the destination is determined as the total power consumption when the vehicle reaches the destination.

6. The method according to claim 5, characterized in that The calculating of the heating power required for additionally heating the battery comprises: The heating power required for additional heating of the battery is calculated by the following formula: Among them, SOC Δ is the heating power required for additional heating; C is the battery capacitance; M is the battery mass; T0 fast is the starting temperature of the battery for fast charging; T1 is the current temperature of the battery; η is the system heating efficiency; E total is the total battery capacity.

7. The method according to claim 5, characterized in that The method further comprises: Comparing the current power of the battery with the total power consumption; When the current power of the battery is greater than or equal to the total power consumption, determining the target temperature of the battery to be the optimal target temperature of the battery; When the current power of the battery is less than the total power consumption, the target temperature of the battery is determined to be the starting temperature required for fast charging of the battery.

8. A battery thermal management device, characterized in that: include: The acquisition module is used to obtain the vehicle's current location information, destination information, and current battery level during the vehicle's driving process; The first judgment module is used to judge whether the vehicle needs to be charged after arriving at the destination according to the current location information of the vehicle, the destination information and the current power of the vehicle; The first determination module is used to determine the remaining range of the vehicle and the current distance to the destination according to the battery power of the vehicle when the vehicle needs to be charged; A comparison module, used to compare the remaining range of the vehicle with the current distance to the destination; A second determination module is used to determine the battery temperature when the vehicle arrives at the destination when the remaining cruising range of the vehicle is greater than the current distance to the destination; The second judgment module is used to judge whether the battery temperature when the vehicle arrives at the destination is greater than the starting temperature required for battery fast charging; The third determination module is used to determine that the battery needs to be additionally heated when the battery temperature when the vehicle arrives at the destination is lower than the starting temperature required for battery fast charging, so that the battery temperature when the vehicle arrives at the destination is greater than or equal to the starting temperature required for battery fast charging.

9. A battery thermal management system, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to implement the battery thermal management method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor corresponding to the battery thermal management system, the battery thermal management system can implement the battery thermal management method as described in any one of claims 1 to 7.

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