Charging Thermal Management Method, System, Vehicle and Computer Device for Vehicle Battery

Abstract

The present invention discloses a charging thermal management method, system, vehicle and computer device for a vehicle battery. The method includes: predicting second temperature data of the environment where the vehicle is located within a set time period; when the cell temperature of the vehicle battery meets a set condition and the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is greater than or equal to a set threshold, calculating the change time for the absolute value of the difference between the cell temperature and the average value of the second temperature data to change to the set threshold according to a preset rule corresponding to the vehicle battery cell; and stopping the thermal action on the vehicle battery when the change time corresponding to each cell temperature is greater than or equal to the duration of the set time period. By predicting the second temperature data of the vehicle within the set time period and calculating the change time for the average value of the cell temperature and the second temperature data to change to the set threshold according to the preset rule, the present invention enables the battery to be maintained within a set temperature range when the user uses the vehicle next time, thereby improving the driving range of the vehicle.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of power batteries, and in particular, to a charging thermal management method, system, vehicle, and computer device for vehicle batteries. Background Art

[0002] With the development of electric vehicles, the cruising range has become the most important factor for consumers to purchase electric vehicles. To make the cruising range as close as possible to the theoretical and advertised mileage, the battery needs to be maintained in the optimal temperature range for as long as possible.

[0003] Most of the current charging thermal management strategies adopt direct thermal management strategies, that is, the battery temperature is divided into five intervals: A, B, C, D, and E. In interval A, only heating is performed without charging; in interval B, both heating and charging are performed; in interval C, only charging is performed; in interval D, charging is performed while cooling; in interval E, only cooling is allowed. There are also some battery management systems that add a charging heat preservation strategy on the basis of direct thermal management. After the charging is completed, if the battery temperature is in intervals A, B, D, or E, heating or cooling is continued for a fixed time of 5 - 10 hours until the temperature falls within the central region of interval C.

[0004] The direct thermal management strategy has no obvious defects during charging, but it directly goes into sleep mode after being fully charged, without temperature control. As a result, when the vehicle owner uses the vehicle after a period of time, heating or cooling is still required, which consumes the battery's energy, reduces the cruising range, and shortens the battery's service life. After adding the charging heat preservation strategy on the basis of direct thermal management, to a certain extent, it avoids the battery temperature being too low or too high when using the vehicle the next day, but it also leads to new problems. When the battery is slightly higher than the ambient temperature in a low-temperature environment, there is no need to heat for too long. The existing charging heat preservation strategy not only wastes electric energy but also increases the vehicle owner's expenses. When the battery is much higher than the ambient temperature in a low-temperature environment, the existing charging heat preservation strategy is not sufficient to maintain the battery in the optimal working temperature range, wasting electricity and failing to achieve the desired effect. The same problem also exists in the case of high-temperature cooling. Summary of the Invention

[0005] The present invention provides a charging thermal management method, system, vehicle, and computer device for vehicle batteries, which can use less electricity while maintaining the vehicle battery in the optimal temperature range, taking into account both cruising range and economy, improving the battery's service life, and enhancing the user experience.

[0006] In a first aspect, an embodiment of the present invention provides a charging thermal management method for a vehicle battery. The charging thermal management method for the vehicle battery includes: predicting second temperature data of the current environment where the vehicle is located within a set period according to environmental parameters of the current environment where the vehicle is located and first temperature data of the vehicle's location area within the set period; wherein, the set period is the period from when the vehicle battery reaches a set power to the next vehicle use time.

[0007] When the cell temperature of the vehicle battery meets a set condition, and the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is greater than or equal to a set threshold, calculate the change time when the absolute value of the difference between the cell temperature and the average value of the second temperature data changes to the set threshold according to a preset rule corresponding to the cell of the vehicle battery; wherein, the vehicle battery meeting the set condition includes that at least one of the average value, maximum value, and minimum value of each cell temperature is within a set temperature range.

[0008] When the change time corresponding to each cell temperature is greater than or equal to the duration of the set period, stop the thermal actions on the vehicle battery. The thermal actions include heating and cooling.

[0009] In a second aspect, an embodiment of the present invention further provides a charging thermal management system for a vehicle battery, including a controller for executing the above-mentioned charging thermal management method for the vehicle battery.

[0010] In a third aspect, an embodiment of the present invention further provides a vehicle, which includes the above-mentioned charging thermal management system for the vehicle battery.

[0011] In a fourth aspect, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-mentioned charging thermal management method for the vehicle battery.

[0012] The charging thermal management method, system, vehicle, and computer device for a vehicle battery provided by an embodiment of the present invention predict the second temperature data of the current environment where the vehicle is located within a set period according to the environmental parameters of the current environment where the vehicle is located and the first temperature data in the set area where the vehicle is located within a set period, and calculate the change time when the average value of the single-cell temperature and the second temperature data changes to a set threshold according to a preset rule corresponding to the single cell of the vehicle battery. After obtaining the change time corresponding to each single-cell temperature, compare this change time with the duration of the set period. When the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set period, stop the thermal action on the vehicle battery. On the one hand, when the user uses the vehicle next time, the temperatures of the single cells in the vehicle battery are also easily in the optimal temperature working range, avoiding the problem that after the single-cell battery is cooled or heated to the set temperature range in advance and the thermal action is turned off, the vehicle battery cannot be maintained in the optimal temperature working range due to continuous cooling or heating under the influence of the current environment, which is beneficial to improving the service life of the battery and the cruising range of the electric vehicle, and enhancing the user experience. On the other hand, when the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set period, stopping the thermal action on the vehicle battery can make the power used for the thermal action less, reduce the waste of power, and reduce the vehicle use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic flowchart of a charging thermal management method for a vehicle battery provided by Embodiment 1 of the present invention;

[0014] Figure 2 is a schematic flowchart of a charging thermal management method for a vehicle battery provided by Embodiment 2 of the present invention;

[0015] Figure 3 is a schematic flowchart of a charging thermal management method for a vehicle battery provided by Embodiment 3 of the present invention;

[0016] Figure 4 is a schematic structural diagram of a computer device provided by Embodiment 4 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0018] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts depict the steps as sequential processes, many of the steps can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the steps can be rearranged. The process can be terminated when its operations are completed, but it can also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subprogram, and so on.

[0019] Embodiment 1

[0020] Figure 1 The figure is a flowchart of a charging thermal management method for a vehicle battery provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of charging thermal management of vehicle batteries. The method of this embodiment can be executed by a control device of the vehicle battery. The control device can be implemented in software and / or hardware and can be integrated into the charging thermal management system or in-vehicle device of the vehicle battery.

[0021] As Figure 1 shown, the charging thermal management method of the vehicle battery includes:

[0022] S101. Predict the second temperature data of the current environment where the vehicle is located within a set period according to the environmental parameters of the current environment where the vehicle is located and the first temperature data of the vehicle's location area within the set period; wherein, the set period is the period from when the vehicle battery reaches the set power to the next vehicle use time.

[0023] Wherein, a vehicle refers to a wheeled vehicle driven or towed by a power device, traveling on the road for people to ride or for transporting goods and for carrying out special engineering operations. Exemplarily, the vehicle can be an electric vehicle including a power battery pack.

[0024] Optionally, the current environment where the vehicle is located is the environment at the current location where the vehicle is parked. Exemplarily, the current location can be an underground parking lot or any open-air parking spot.

[0025] The environmental parameters include but are not limited to the external wind speed, wind direction, and humidity.

[0026] Optionally, the vehicle's location area is the area of the city to which the location where the vehicle is parked belongs. Exemplarily, the vehicle's location area can be Dongli District, Tianjin, or it can also be Haidian District, Beijing. In other optional embodiments of the present invention, the vehicle's location area can be the city to which the vehicle's parking location belongs, such as Tianjin, Beijing, etc.

[0027] Optionally, the set period is the period from when the vehicle battery reaches the set power to the next use of the vehicle. Specifically, after the vehicle comes to a stop, the vehicle enters the slow charging state. As the charging progresses, the power of the vehicle battery reaches the set power. Exemplarily, the set power is 96% of the vehicle battery capacity. The next vehicle use time is the time when the vehicle owner uses the vehicle next time after the vehicle comes to a stop this time. The next vehicle use time can be obtained in various ways. In an optional embodiment, the user customizes the next vehicle use time through an APP related to vehicle control.

[0028] Optionally, the first temperature data may include multiple temperature data of the area where the vehicle is located within the set period, where the temperature data included in the first temperature data is related to the duration of the set period and the time interval between adjacent temperature data. Exemplarily, the set period is 2 hours, and the interval duration between adjacent temperature data is half an hour. The first temperature data may include five temperature data. The acquisition method of the first temperature data can be various. Optionally, it is obtained by connecting to the Internet. The first temperature data within the set period may include a temperature set composed of multiple temperatures. Optionally, the second temperature data is the ambient temperature of the place where the vehicle is parked within the set period. The acquisition method of the second temperature data can be obtained based on the first temperature data and the environmental parameters of the current environment where the vehicle is located. Exemplarily, the temperature difference between the current environment and the area where the vehicle is located can be predicted based on the environmental parameters of the current environment and the environmental parameters of the area where the vehicle is located, and then the second temperature data can be obtained.

[0029] S102. When the single-cell temperature of the vehicle battery meets the set condition and the absolute value of the difference between the average value of the second temperature data and the average value of the single-cell temperature of the vehicle battery is greater than or equal to the set threshold, calculate the change time when the absolute value of the difference between the single-cell temperature and the average value of the second temperature data changes to the set threshold according to the preset rule corresponding to the single cell of the vehicle battery.

[0030] Among them, the set condition includes that at least one of the average value, the maximum value, and the minimum value of each single-cell temperature is within the set temperature range.

[0031] Among them, the vehicle battery is composed of multiple single cells, and the single-cell temperature is the temperature of the single cell in the vehicle battery. The average value of the single-cell temperature is the average value of the temperature of each cell, the maximum value of the single-cell temperature is the temperature of the single cell with the highest temperature among the temperatures of multiple single cells, and the minimum value of the single-cell temperature is the temperature of the single cell with the lowest temperature among the temperatures of multiple single cells. Among them, the set temperature range is the optimal temperature working range of the battery. Since different battery types have different optimal temperature working ranges. Therefore, the set temperature range is not specifically limited here. Exemplarily, the set temperature range of a lithium battery can be [0 °C, 45 °C].

[0032] Optionally, the set threshold value can be an empirical value obtained through multiple experimental simulations. Exemplarily, the set threshold value can be 10.

[0033] Optionally, the preset rule can be a preset function. The preset function includes but is not limited to preset parameters.

[0034] Among them, the change time can be the cooling time or the heating time. When the single-cell temperature of the vehicle battery meets the set conditions and the absolute value of the difference between the average value of the second temperature data and the average value of the single-cell temperature of the vehicle battery is greater than or equal to the set threshold value, calculate the change time when the absolute value of the difference between the single-cell temperature and the average value of the second temperature data changes to the set threshold value. Among them, when the absolute value of the difference between the average value of the second temperature data and the average value of the single-cell temperature of the vehicle battery is less than or equal to the set threshold value, the single-cell temperature of the vehicle battery all meets the set temperature range; when the absolute value of the difference between the average value of the second temperature data and the average value of the single-cell temperature of the vehicle battery is greater than the set threshold value, the single-cell temperature of the vehicle battery does not all meet the set temperature range.

[0035] S103. When the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set time period, stop the thermal action on the vehicle battery.

[0036] The thermal action includes heating and cooling. Optionally, the thermal action also includes cycling.

[0037] After obtaining the change time corresponding to each single-cell temperature in step 103, compare the change time with the duration of the set time period. Optionally, when the change time corresponding to any single-cell temperature is less than the duration of the set time period, continue the thermal action on the vehicle battery so that the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set time period. Thus, on the one hand, when the user uses the vehicle next time, the temperatures of the individual cells in the vehicle battery are all likely to be in the optimal temperature working range. And even if the next vehicle use time is delayed due to some reasons, the temperatures of the individual cells in the vehicle battery are also all likely to be in the optimal temperature working range, avoiding the problem that after the individual cell is cooled or heated to the set temperature range in advance and the thermal action is turned off, the vehicle battery cannot be maintained in the optimal temperature working range due to continued cooling or heating under the influence of the current environment. On the other hand, when the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set time period, stopping the thermal action on the vehicle battery can make the power consumption of the thermal action less and reduce the waste of power. Exemplarily, the duration of the set time period is 7 hours. When the change time corresponding to each single-cell temperature is greater than or equal to 7, stop the thermal action on the vehicle battery.

[0038] The technical solution of this embodiment predicts the second temperature data of the current environment where the vehicle is located within a set period according to the environmental parameters of the current environment where the vehicle is located and the first temperature data of the area where the vehicle is located within the set period, and calculates the change time when the average value of the single-cell temperature and the second temperature data changes to a set threshold according to the preset rules corresponding to the single cells of the vehicle battery. After obtaining the change time corresponding to each single-cell temperature, compare this change time with the duration of the set period. When the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set period, stop the thermal action on the vehicle battery. On the one hand, when the user uses the vehicle next time, the temperatures of the single cells in the vehicle battery are also likely to be in the optimal temperature working range, avoiding the problem that after the single-cell battery is cooled or heated to the set temperature range in advance and the thermal action is turned off, the vehicle battery cannot be maintained in the optimal temperature working range due to continued cooling or heating under the influence of the current environment, which is beneficial to improving the service life of the battery and the cruising range of the electric vehicle, and enhancing the user experience. On the other hand, when the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set period, stopping the thermal action on the vehicle battery can make the power used for the thermal action less, reduce the waste of power, and reduce the vehicle use cost.

[0039] Embodiment 2

[0040] Figure 2 It is a schematic flowchart of a charging thermal management method for a vehicle battery provided by the second embodiment of the present invention, which is further optimized and extended based on the above embodiment and can be combined with each optional technical solution in the above embodiment. As Figure 2 shown, the method may include:

[0041] S201. Obtain the environmental parameters of the current environment where the vehicle is located.

[0042] Among them, the environmental parameters include wind speed. Exemplarily, a wind speed sensor is set on the vehicle, and the wind speed is obtained through the wind speed sensor. Optionally, the environmental parameters may further include temperature. Exemplarily, a temperature sensor is set on the vehicle, and the temperature is obtained through the temperature sensor.

[0043] S202. After obtaining that the vehicle battery is charged to more than the set power, obtain the user's next vehicle use time from the big data platform.

[0044] Among them, the vehicle battery being charged to a level greater than a set power can be understood as, in the charging state, the State Of Charge (SOC) value of the battery being greater than a set value. The state of charge refers to the ratio of the current remaining capacity of the vehicle battery to the capacity of the vehicle battery in a fully charged state. The current SOC value of the vehicle battery is stored in the Battery Management System (BMS) or other databases. Therefore, after determining that the vehicle battery is in the charging state, the current SOC value of the vehicle battery can be obtained from the BMS. Exemplarily, after the vehicle battery is charged to more than 96%, the next vehicle usage time of the user is obtained from the big data platform.

[0045] Optionally, the big data platform stores the driving habits of multiple users. The driving habits of each user include, but are not limited to, the next vehicle usage time of the user and the locations where the vehicle is frequently parked. The next vehicle usage time of the user can be easily obtained through the big data platform, which is convenient and fast.

[0046] S203. Connect to the Internet to obtain the first temperature data of the vehicle's location area within a set time period.

[0047] Optionally, obtain the weather forecast of the vehicle's location area by connecting to the Internet, and then obtain the first temperature data.

[0048] S204. Import the environmental parameters of the vehicle's current environment and the first temperature data of the vehicle's location area within a set time period into the big data platform, so that the big data platform predicts the temperature difference function between the vehicle's current environment and the vehicle's location area, and determines the second temperature data of the vehicle's current environment within a set time period according to the temperature difference function.

[0049] Optionally, the temperature difference function is a function of the temperature of the vehicle's current environment and the corresponding temperature of the vehicle's location area calculated through an algorithm built into the big data platform. The big data platform stores the environmental parameters of the current environment, the first temperature data of the vehicle's location area within a set time period, and the corresponding relationship between the temperature difference between the current environment and the vehicle's location area. Therefore, according to the environmental parameters of the current environment and the first temperature data of the vehicle's location area within a set time period, the temperature difference function can be obtained, and then the second temperature data of the vehicle's current environment within a set time period can be obtained.

[0050] S205. Obtain the temperatures of each cell of the vehicle battery, and determine whether the average value, the maximum value, and the minimum value of the temperatures of each cell are all within a set temperature range;

[0051] If so, execute step S2061; if not, execute step S2062;

[0052] S2061. Determine that the individual temperature of the vehicle battery meets the set conditions.

[0053] S2062. Continue to perform thermal actions on the vehicle battery until the individual temperature of the vehicle battery meets the set conditions.

[0054] In this embodiment, the set condition is that the average value of each individual temperature, the maximum value of each individual temperature, and the minimum value of each individual temperature are all within the set temperature range. Specifically, when the average value of each individual temperature, the maximum value of each individual temperature, and the minimum value of each individual temperature are all within the set temperature range (i.e., the optimal temperature operating range), each individual of the vehicle battery can have the best operating performance.

[0055] S2071. When the absolute value of the difference between the average value of the second temperature data and the average value of the individual temperature of the vehicle battery is greater than or equal to the set threshold, calculate the change time when the absolute value of the difference between the individual temperature and the average value of the second temperature data changes to the set threshold according to the preset rule corresponding to the individual of the vehicle battery.

[0056] S2072. When the absolute value of the difference between the average value of the second temperature data and the average value of the individual temperature of the vehicle battery is less than the set threshold, stop the thermal action on the vehicle.

[0057] S2073. Determine whether the change time corresponding to each individual temperature is greater than or equal to the duration of the set time period.

[0058] If so, execute step S2071; if not, execute step S2072.

[0059] S2081. Stop the thermal action on the vehicle battery.

[0060] S2082. Continue to perform thermal actions on the vehicle battery and return to step S204.

[0061] Specifically, when the absolute value of the difference between the average value of the second temperature data and the average value of the individual temperature of the vehicle battery is less than the set threshold, it indicates that each individual of the vehicle battery can operate in the optimal temperature operating range, so there is no need to perform thermal actions.

[0062] S209. Continue to charge the vehicle battery and control it to enter the dormant state after full charge.

[0063] It should be understood that when the absolute value of the difference between the average value of the second temperature data and the average value of the individual temperature of the vehicle battery is less than the set threshold, it indicates that the temperature of the vehicle battery is maintained within the set temperature range, and the thermal action on the vehicle should be stopped.

[0064] The technical solution of this embodiment combines the big data platform with the Internet, obtains the weather forecast of the area where the vehicle is located through the Internet, and then obtains the first temperature data. Obtain the temperature difference function between the current environment and the area where the vehicle is located within a set time period through the big data platform, and then obtain the second temperature data within the set time period according to the first temperature data and the temperature difference function. Then, determine whether to perform a thermal action on the vehicle battery according to the second temperature data and the single-cell temperature of the vehicle battery, so that the vehicle battery can work in the optimal temperature working range when the user uses the vehicle next time, and reduce the power consumption of the thermal action.

[0065] Embodiment III

[0066] Figure 3 It is a schematic flowchart of a charging thermal management method for a vehicle battery provided by Embodiment III of the present invention, which is further optimized and extended based on the above embodiments and can be combined with various optional technical solutions in the above embodiments. As Figure 4 shown, the method may include:

[0067] S301. Predict the second temperature data of the current environment where the vehicle is located within a set time period according to the environmental parameters of the current environment where the vehicle is located and the first temperature data of the area where the vehicle is located within the set time period.

[0068] S302. When the single-cell temperature of the vehicle battery meets the set conditions and the absolute value of the difference between the average value of the second temperature data and the average value of the single-cell temperature of the vehicle battery is greater than or equal to the set threshold, calculate the change time when the absolute value of the difference between the single-cell temperature and the average value of the second temperature data changes to the set threshold according to the preset rules corresponding to the single cell of the vehicle battery.

[0069] S303. When the change time corresponding to each single-cell temperature is greater than or equal to the duration of the set time period, stop the thermal action on the vehicle battery.

[0070] S304. Continue to charge the vehicle battery and control it to go into hibernation after full charge.

[0071] S305. Obtain the predicted single-cell temperatures of the vehicle battery at the next vehicle use time according to the stored data, and set to wake up after a preset duration at the next vehicle use time.

[0072] The stored data may include a data table of the single-cell temperatures at a certain moment and the single-cell temperatures after a certain time (the certain time includes the duration corresponding to the set time period) when the current environment of the vehicle location is at each temperature environment. The method for obtaining the stored data may be in the BMS or other databases. For example, the single-cell temperature at a certain current time may be 10 degrees Celsius, and the single-cell temperature at the next vehicle use time corresponding in the stored data may be 20 degrees Celsius.

[0073] The predicted cell temperature is the cell temperature at the predicted next vehicle usage time.

[0074] The preset duration is the length of time set in advance. For example, the preset duration can be 10 minutes.

[0075] S306. After waking up at the preset duration of the next vehicle usage time, obtain the actual cell temperatures of the vehicle battery, correct the preset parameters in the corresponding preset function according to the predicted cell temperature and the corresponding actual cell temperature of the vehicle battery cell, and update and save the corresponding preset function.

[0076] The actual cell temperature is the cell temperature after waking up at the preset duration.

[0077] The preset function is a function of the difference between the average value of the cell temperatures of the vehicle battery and the average value of the second temperature data and the time required to reduce the difference between the average value of the cell temperatures of the vehicle battery and the average value of the second temperature data to a set threshold. For example, the preset function can be

[0078] where f(x) represents the time required to reduce the difference between the average value of the cell temperatures of the vehicle battery and the average value of the second temperature data to a set threshold; x i is the difference between the average value of the cell temperatures and the average value of the second temperature data; p1, p2, p3, and p4 are preset parameters. Exemplarily, based on empirical values, p1 = 0.0102, p2 = 0.7511, p3 = 1.689, and p4 = -81.8.

[0079] Specifically, calculate the prediction accuracy of the cell temperature of the vehicle battery according to the following formula:

[0080]

[0081] where T i [E] represents the prediction accuracy after the i-th execution of the set steps, where the set steps include obtaining the predicted cell temperatures of the vehicle battery at the next vehicle usage time according to the stored data, and setting to wake up after the preset duration of the next vehicle usage time and the previous steps; T i-1 [E] represents the prediction accuracy after the (i - 1)-th execution of the set steps; T i [n0] represents the predicted cell temperature of the vehicle battery cell obtained by the i-th execution of obtaining the predicted cell temperatures of the vehicle battery at the next vehicle usage time according to the stored data; T i [m0] represents the actual cell temperature of the vehicle battery cell obtained by the i-th execution of obtaining the actual cell temperatures of the vehicle battery after waking up at the preset duration of the next vehicle usage time. |T i [mo] - T i[no]|When it is ≥3, it indicates inaccurate prediction, |T i [mo]-T i [no]|When it is <3, it indicates accurate prediction. Exemplarily, the initial value T0[E]=0, |When |T1[mo]-T1[no]|≥3, T1[E]=1. |When |T2[mo]-T2[no]|≥3, T2[E]=2. |When |T3[mo]-T3[no]|<3, T3[E]=0.

[0082] When the prediction accuracy after the i-th execution of the setting step is greater than or equal to the set accuracy threshold, the prediction parameters of the prediction function are corrected and the preset function is updated and saved.

[0083] The technical solution of this embodiment solves the problem of inaccurate preset functions by correcting the preset parameters and updating the corresponding preset function save, enabling the preset parameters in the preset function to change in real time according to the actual single-cell temperature of the vehicle battery, improving the accuracy of the preset function, and further improving the accuracy of calculating the change time from the average value of the single-cell temperature and the second temperature data to the set threshold according to the preset rules corresponding to the single cells of the vehicle battery.

[0084] Embodiment Four

[0085] Figure 4 It is a schematic structural diagram of a computer device provided in Embodiment Four of the present invention.

[0086] As Figure 4 shown, the computer device 50 includes a memory, a processor 51, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the charging thermal management method of the vehicle battery provided in any embodiment of the present invention.

[0087] Among them, the processor 51 is communicatively connected to the memory. The memory can be a read-only memory (ROM) 52, a random access memory (RAM) 53, etc. The memory stores a computer program executable by at least one processor. The processor 51 can execute various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 52 or the computer program loaded from the storage unit 58 into the random access memory (RAM) 53. In the RAM 53, various programs and data required for the operation of the credit rating determination device 50 can also be stored. The processor 51, the ROM 52, and the RAM 53 are connected to each other through a bus 54. The input / output (I / O) interface 55 is also connected to the bus 54.

[0088] Multiple components in the computer device 50 are connected to the I / O interface 55, including: an input unit 56, such as a keyboard, a mouse, etc.; an output unit 57, such as various types of displays, speakers, etc.; a storage unit 58, such as a disk, an optical disc, etc.; and a communication unit 59, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 59 allows the computer device 50 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0089] The processor 51 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 51 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 51 executes the various methods and processes described above, such as the charging thermal management method for a vehicle battery.

[0090] Various embodiments of the systems and techniques described above in this document can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special-purpose or general-purpose programmable processor, and can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0091] The computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to the processors of general-purpose computers, special-purpose computers, or other programmable data processing devices, such that when the computer programs are executed by the processors, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer programs can be executed entirely on a machine, partially on a machine, executed partially on a machine and partially on a remote machine as an independent software package, or executed entirely on a remote machine or server.

[0092] An embodiment of the present invention also provides a charging thermal management system for a vehicle battery. The charging thermal management system includes a controller that is used to execute the method of any of the above embodiments of the present invention, and the management system has the beneficial effects of any of the above embodiments of the present invention.

[0093] Specifically, environmental parameters of the current environment are obtained through environmental parameter sensors on the vehicle body. The environmental parameter sensors upload the environmental parameters to the controller. For example, when the environmental parameters include wind speed, the environmental parameter sensors include wind speed sensors; when the environmental parameters include temperature, the environmental parameter sensors include temperature sensors. The vehicle networking module is used to achieve interaction with the Internet and the big data platform, and transmit the acquired information to the controller. The controller executes the method of any of the above embodiments of the present invention according to the acquired information.

[0094] An embodiment of the present invention further provides a vehicle, which includes the charging thermal management system of the vehicle battery in the above embodiment, an environmental parameter sensor for obtaining environmental parameters of the current environment, and a vehicle networking module for interacting with the Internet and interacting with the big data platform.

[0095] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A charging thermal management method for a vehicle battery, characterized in that, Including: Predicting second temperature data of the current environment where the vehicle is located within the set time period according to environmental parameters of the current environment where the vehicle is located and first temperature data of the area where the vehicle is located within the set time period; wherein, the set time period is the time period from when the vehicle battery reaches the set power to the next vehicle use; When the cell temperature of the vehicle battery meets the set conditions, and the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is greater than or equal to the set threshold, calculating the change time for the absolute value of the difference between the cell temperature and the average value of the second temperature data to change to the set threshold according to the preset rules corresponding to the cells of the vehicle battery; wherein, the set conditions include that at least one of the average value, the maximum value, and the minimum value of each cell temperature is within the set temperature range; When the change time corresponding to each cell temperature is greater than or equal to the duration of the set time period, stopping the thermal actions on the vehicle battery, where the thermal actions include heating and cooling.

2. The charging thermal management method of the vehicle battery according to claim 1, wherein Before predicting the second temperature data of the current environment where the vehicle is located within the set time period according to environmental parameters of the current environment where the vehicle is located and first temperature data of the area where the vehicle is located within the set time period, it further includes: Obtaining environmental parameters of the current environment where the vehicle is located; wherein the environmental parameters include wind speed; After obtaining that the vehicle battery is charged to more than the set power, obtaining the user's next vehicle use time from the big data platform.

3. The charging thermal management method of the vehicle battery according to claim 1, characterized in that, Before predicting the second temperature data of the current environment where the vehicle is located within the set time period according to environmental parameters of the current environment where the vehicle is located and first temperature data of the area where the vehicle is located within the set time period, it further includes: Connecting to the Internet to obtain the first temperature data of the area where the vehicle is located within the set time period.

4. The charging thermal management method for a vehicle battery according to claim 1, wherein Predicting the second temperature data of the current environment where the vehicle is located within the set time period according to environmental parameters of the current environment where the vehicle is located and first temperature data of the area where the vehicle is located within the set time period includes: Importing the environmental parameters of the current environment where the vehicle is located and the first temperature data of the area where the vehicle is located within the set time period into the big data platform, so that the big data platform predicts the temperature difference function between the current environment where the vehicle is located and the area where the vehicle is located, and determining the second temperature data of the current environment where the vehicle is located within the set time period according to the temperature difference function.

5. The charging thermal management method of the vehicle battery according to claim 1, characterized in that, Before calculating the change time for the absolute value of the difference between each cell temperature and the average value of the second temperature data to change to the set threshold according to the preset rules when the cell temperature of the vehicle battery meets the set conditions and the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is greater than the set threshold, it further includes: Obtaining the cell temperatures of the vehicle battery, and judging whether the average value of each cell temperature, the maximum value of each cell temperature, and the minimum value of each cell temperature are all within the set temperature range; If so, determining that the cell temperature of the vehicle battery meets the set conditions.

6. The charging thermal management method of the vehicle battery according to claim 1 or 5, characterized in that When the cell temperature of the vehicle battery satisfies the set conditions and the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is greater than the set threshold, before calculating the change time for each cell temperature and the average value of the second temperature data to change to the set threshold according to the preset rules, it further includes: When the cell temperature of the vehicle battery does not satisfy the set conditions, continue to perform thermal actions on the vehicle battery until the cell temperature of the vehicle battery satisfies the set conditions.

7. The charging thermal management method of the vehicle battery according to claim 5, wherein After determining that the cell temperature of the vehicle battery satisfies the set conditions, it further includes: When the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is less than the set threshold, stop the thermal actions on the vehicle.

8. The charging thermal management method for a vehicle battery according to claim 1, characterized in that, After calculating the change time for each cell temperature and the average value of the second temperature data to change to the set threshold according to the preset rules corresponding to the cells of the vehicle battery when the cell temperature of the vehicle battery satisfies the set conditions and the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is greater than or equal to the set threshold, it further includes: When the change time corresponding to any cell temperature is less than the duration of the set period, continue to perform thermal actions on the vehicle battery, and return to execute the step of calculating the change time for the cell temperature and the average value of the second temperature data to change to the set threshold according to the preset rules corresponding to the cells of the vehicle battery and its subsequent steps when the cell temperature of the vehicle battery satisfies the set conditions and the absolute value of the difference between the average value of the second temperature data and the average value of the cell temperature of the vehicle battery is greater than or equal to the set threshold.

9. The charging thermal management method of the vehicle battery according to claim 2, characterized in that, The preset rules include a preset function, and the preset function includes preset parameters.

10. The charging thermal management method of the vehicle battery according to claim 9, wherein After stopping the heating and cooling of the vehicle battery when the change time corresponding to each cell temperature is greater than or equal to the duration of the set period, it further includes: Obtain the predicted cell temperatures of the vehicle battery at the next vehicle use time according to the stored data, and set to wake up after a preset duration at the next vehicle use time; After waking up after the preset duration at the next vehicle use time, obtain the actual cell temperatures of the vehicle battery, correct the preset parameters in the corresponding preset function according to the predicted cell temperature and the corresponding actual cell temperature of the vehicle battery cell, and update and save the corresponding preset function.

11. The charging thermal management method of the vehicle battery according to claim 10, characterized in that, The step of obtaining the actual cell temperatures of the vehicle battery after waking up after the preset duration at the next vehicle use time, correcting the preset parameters in the corresponding preset function according to the predicted cell temperature and the corresponding actual cell temperature of the vehicle battery cell, and updating and saving the corresponding preset function includes: Calculate the prediction accuracy of the cell temperature of the vehicle battery according to the following formula: Among them, represents the prediction accuracy after the i-th execution of the setting step, where the setting step includes obtaining the predicted single-cell temperatures of the vehicle battery when obtaining the next vehicle usage time according to the stored data, and setting to wake up after a preset duration at the next vehicle usage time and the previous steps; represents the prediction accuracy after the (i - 1)-th execution of the setting step; represents the predicted single-cell temperature of the vehicle battery single cell obtained by the i-th execution of obtaining the predicted single-cell temperatures of the vehicle battery when obtaining the next vehicle usage time according to the stored data; represents the actual single-cell temperature of the vehicle battery single cell obtained by the i-th execution of obtaining the actual single-cell temperatures of the vehicle battery after waking up for a preset duration at the next vehicle usage time; When the prediction accuracy after the i-th execution of the set step is greater than or equal to the set accuracy threshold, correct the prediction parameters of the preset function and update and save the preset function.

12. The charging thermal management method for a vehicle battery according to claim 1 or 7, wherein: After stopping the thermal action on the vehicle battery, it further includes: Continuing to charge the vehicle battery and controlling it to enter a dormant state after full charge.

13. A charging thermal management system for a vehicle battery, characterized in that, It includes a controller for executing the charging thermal management method for the vehicle battery according to any one of claims 1-12.

14. A vehicle, characterized in that, It includes the charging thermal management system for the vehicle battery according to claim 13.

15. A computer device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, it implements the charging thermal management method for the vehicle battery according to any one of claims 1 to 12.

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