Battery fast charging-based thermal management control method and device, and electronic device

Abstract

The application provides a battery fast charging based thermal management control method and device and electronic equipment. The method comprises: obtaining a current parameter set of a battery system; determining, according to a pre-created charging MAP table, an optimal charging rate of a starting point of a next charging stage of the battery system and a target temperature corresponding to the optimal charging rate; determining an expected thermal management rate of a thermal management system for charging the battery system at the optimal charging rate and the target temperature at the starting point; before a current SOC of the battery system reaches the next charging stage, controlling the thermal management system to operate based on a thermal management rate obtained by interpolation of a current thermal management rate and the expected thermal management rate; and when the current SOC of the battery system reaches the next charging stage, controlling the thermal management system to operate based on the expected thermal management rate. In this way, the charging capacity of the battery system can be fully utilized, and the charging efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a thermal management control method, device, and electronic device based on fast battery charging. Background Technology

[0002] As a carrier of new energy, power batteries are gradually being widely used. For example, in new energy vehicles, the power battery is one of the core components, and its charging performance directly affects the user experience. Currently, the charging time of power batteries remains a pain point in user experience, with a long charging process, especially in high and low temperature scenarios, where charging time can reach 1 to 2 hours, while a gasoline car can be refueled in just 3 to 5 minutes. The time cost due to the difference in scenarios is far greater. Currently, power battery charging control, in high temperature (e.g., above 40°C) or low temperature (e.g., below 0°C) environments, can usually only roughly regulate the battery temperature, and this temperature regulation still affects the charging efficiency of the power battery. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a thermal management control method, device and electronic device based on fast charging of batteries, which can finely adjust the temperature of the battery during fast charging and improve the problem of charging efficiency being affected by coarse temperature adjustment during fast charging.

[0004] To achieve the above technical objectives, the technical solution adopted in this application is as follows:

[0005] In a first aspect, embodiments of this application provide a thermal management control method based on fast battery charging, the method comprising:

[0006] Obtain the current parameter set of the battery system, wherein the current parameter set includes the current temperature and the current state of charge (SOC);

[0007] Based on a pre-created charging MAP table, the optimal charging rate and the target temperature corresponding to the optimal charging rate at the starting point of the next charging stage of the battery system are determined, wherein the next charging stage is a SOC range after the current SOC charging stage.

[0008] Based on a pre-established correspondence between temperature, SOC, charging rate, and thermal management rate, the desired thermal management rate is determined so that the thermal management system charges the battery system at the optimal charging rate and the target temperature at the starting point. The thermal management system is used to regulate the temperature of the batteries in the battery system, and the desired thermal management rate is either a cooling rate or a heating rate.

[0009] interpolating the current thermal management ratio of the thermal management system and the expected thermal management ratio before the current SOC of the battery system reaches the next charging phase, and controlling the thermal management system to operate based on the thermal management ratio obtained by interpolation;

[0010] controlling the thermal management system to operate based on the expected thermal management ratio when the current SOC of the battery system reaches the next charging phase.

[0011] With reference to the first aspect, in some optional embodiments, before the current parameter set of the battery system is acquired, the method further includes:

[0012] creating a charging MAP table based on a calibration parameter set corresponding to the battery system, the calibration parameter set including charging ratios of the battery system corresponding to a plurality of SOCs and a plurality of temperatures;

[0013] establishing a first energy curve of the battery system corresponding to a temperature, a charging current and a heat generation power of the battery system, and a second energy curve of the battery system corresponding to the temperature, the charging current and a heat exchange power of the thermal management system according to the temperature, the charging current, the heat generation power of the battery system and the heat exchange power of the thermal management system;

[0014] establishing a relationship function of a charging ratio, a heat generation power of the battery system and a thermal management ratio of the thermal management system;

[0015] establishing a thermal management ratio-charging ratio matrix according to the relationship function;

[0016] establishing the correspondence between the temperature, the SOC and the charging ratio and the thermal management ratio according to the charging MAP table, the first energy curve, the second energy curve and the thermal management ratio-charging ratio matrix.

[0017] With reference to the first aspect, in some optional embodiments, before the current SOC of the battery system reaches the next charging phase, the interpolating the current thermal management ratio of the thermal management system and the expected thermal management ratio, and controlling the thermal management system to operate based on the thermal management ratio obtained by interpolation includes:

[0018] estimating a time length required for the temperature of the battery system to reach the target temperature through the thermal management system according to a value range of the thermal management ratio of the thermal management system based on the current temperature before the current SOC of the battery system reaches the next charging phase;

[0019] interpolating the current thermal management ratio of the thermal management system and the expected thermal management ratio;

[0020] Control the thermal management system to operate based on the time length and the thermal management ratio obtained by interpolation.

[0021] In combination with the first aspect, in some optional embodiments, if the current temperature is higher than the target temperature, the expected thermal management ratio is a cooling ratio; and if the current temperature is lower than the target temperature, the expected thermal management ratio is a heating ratio.

[0022] In combination with the first aspect, in some optional embodiments, the method further includes:

[0023] When the expected thermal management ratio is a cooling ratio, and within a preset time period, the charging ratio of the battery system is reduced, and the heat generation power of the battery system is less than a preset power threshold, the cooling ratio of the thermal management system is controlled to be reduced.

[0024] In combination with the first aspect, in some optional embodiments, the method further includes:

[0025] By using the charging MAP table, an optimal charging path corresponding to the current temperature and the current SOC of the battery system is determined, and a charging request is sent to a charging station based on the optimal charging path, so that the charging station charges the battery system according to the optimal charging path.

[0026] In a second aspect, the embodiments of the present application also provide a thermal management control device based on battery fast charging, which includes:

[0027] An acquisition unit is configured to acquire a current parameter set of a battery system, wherein the current parameter set includes a current temperature and a current SOC;

[0028] A first determination unit is configured to determine, according to a pre-created charging MAP table, an optimal charging ratio of a starting point of a next charging phase of the battery system and a target temperature corresponding to the optimal charging ratio, wherein the next charging phase is a SOC range after a charging phase in which the current SOC is located.

[0029] A second determination unit is configured to determine, according to a pre-created correspondence relationship among temperature, SOC, charging ratio and thermal management ratio, an expected thermal management ratio of a thermal management system for charging the battery system at the optimal charging ratio and the target temperature at the starting point, wherein the thermal management system is configured to adjust the temperature of the battery in the battery system, and the expected thermal management ratio is a cooling ratio or a heating ratio.

[0030] The control unit is configured to, before the current SOC of the battery system reaches the next charging stage, perform interpolation operation according to a current thermal management multiple of the thermal management system and the expected thermal management multiple, and control the thermal management system to operate based on the thermal management multiple obtained through the interpolation operation.

[0031] The control unit is further configured to, when the current SOC of the battery system reaches the next charging stage, control the thermal management system to operate based on the expected thermal management multiple.

[0032] With reference to the second aspect, in some optional embodiments, the apparatus further includes a creating unit, a first establishing unit, a second establishing unit, a third establishing unit, and a fourth establishing unit.

[0033] Before the obtaining unit obtains the current parameter set of the battery system, the creating unit is configured to create a charging MAP table based on a calibration parameter set corresponding to the battery system, the calibration parameter set including charging multiples of the battery system corresponding to a plurality of SOCs and a plurality of temperatures.

[0034] The first establishing unit is configured to establish, according to the temperature, the charging current, the heat generation power of the battery system, and the heat exchange power of the thermal management system, a first energy curve corresponding to the temperature, the charging current, and the heat generation power of the battery system, and a second energy curve corresponding to the temperature, the charging current of the battery system, and the heat exchange power of the thermal management system.

[0035] The second establishing unit is configured to establish a relationship function of the charging multiple, the heat generation power of the battery system, and the thermal management multiple of the thermal management system.

[0036] The third establishing unit is configured to establish, according to the relationship function, a thermal management multiple-charging multiple matrix.

[0037] The fourth establishing unit is configured to establish, according to the charging MAP table, the first energy curve, the second energy curve, and the thermal management multiple-charging multiple matrix, the correspondence between the temperature, the SOC, the charging multiple, and the thermal management multiple.

[0038] In a third aspect, an embodiment of the present application further provides an electronic device, which includes a processor and a memory coupled to each other, and the memory stores a computer program. When the computer program is executed by the processor, the electronic device performs the method described above.

[0039] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, which stores a computer program. When the computer program is run on a computer, the computer performs the method described above.

[0040] The application with the technical scheme has the following advantages:

[0041] In the technical scheme provided in the application, the optimal charging rate of the starting point of the next charging stage of the battery system and the target temperature corresponding to the optimal charging rate are determined according to the pre-created charging MAP table; before the current SOC of the battery system reaches the next charging stage, interpolation operation is performed according to the current thermal management rate and the expected thermal management rate of the thermal management system, and the thermal management system is controlled to operate based on the thermal management rate obtained by interpolation; when the current SOC of the battery system reaches the next charging stage, the thermal management system is controlled to operate based on the expected thermal management rate. In this way, through pre-judgment and pre-control, a pre-control strategy of intelligent and efficient thermal management is formed, which can finely adjust the temperature of the battery system and make the battery system reach a comfortable temperature for fast charging, which is beneficial to fully exert the charging capacity of the battery system and improve the charging efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0042] The application can be further illustrated by the non-limiting embodiments shown in the accompanying drawings. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0043] Figure 1 The flowchart of the battery fast charging based thermal management control method provided for the embodiments of the application.

[0044] Figure 2 The schematic diagram of the charging rate-heat generation-heat exchange curve provided for the embodiments of the application.

[0045] Figure 3 The block diagram of the thermal management control device provided for the embodiments of the application.

[0046] Figure legend: 200-thermal management control device; 210-acquisition unit; 220-first determination unit; 220-second determination unit; 230-control unit. DETAILED DESCRIPTION

[0047] The application will be described in detail below in conjunction with the drawings and specific embodiments. It should be noted that in the drawings or description, similar or identical parts are denoted by the same reference numerals, and the implementation modes not shown or described in the drawings are known to those skilled in the art. In the description of the application, the terms "first", "second", etc. are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0048] The electronic device can include a processing module and a storage module. The storage module stores a computer program, which, when executed by the processing module, enables the electronic device to perform corresponding steps in the following thermal management control method.

[0049] The electronic device can be deployed on a vehicle with a battery system and can serve as a hardware device of the vehicle for intelligent thermal management of the battery system. In this embodiment, the battery system generally includes a plurality of battery cells. That is, the plurality of battery cells form the battery system through series and / or parallel connection and can serve as a power battery of an electric vehicle.

[0050] Please refer to Figure 1 The present application also provides a thermal management control method based on battery fast charging, referred to as a thermal management control method. The method can be applied to the electronic device described above, and each step of the method is executed or implemented by the electronic device. The thermal management control method can implement the pre-control logic of the thermal management process during the charging process of the power battery under high temperature conditions (such as battery temperature exceeding 40℃) or low temperature conditions (such as battery temperature below 0℃). The thermal management control method can include the following steps:

[0051] Step 110, obtaining a current parameter set of the battery system, wherein the current parameter set includes a current temperature and a current SOC;

[0052] Step 120, determining, according to a pre-created charging MAP table, an optimal charging rate of a starting point of a next charging phase of the battery system and a target temperature corresponding to the optimal charging rate, wherein the next charging phase is a SOC range after a charging phase in which the current SOC is located;

[0053] Step 130, determining, according to a pre-created correspondence between temperature, SOC, charging rate, and thermal management rate, an expected thermal management rate of a thermal management system for charging the battery system at the optimal charging rate and the target temperature at the starting point, wherein the thermal management system is used for temperature regulation of the battery in the battery system, and the expected thermal management rate is a cooling rate or a heating rate;

[0054] Step 140, before the current SOC of the battery system reaches the next charging phase, performing interpolation operation according to the current thermal management rate of the thermal management system and the expected thermal management rate, and controlling the thermal management system to operate based on the thermal management rate obtained by interpolation;

[0055] Step 150, when the current SOC of the battery system reaches the next charging phase, controlling the thermal management system to operate based on the expected thermal management rate.

[0056] The steps of the thermal management control method will be described in detail as follows:

[0057] In this embodiment, the implementation process of the thermal management control method can include the creation of a relationship algorithm (corresponding to steps 101 to 105 described below) and the application of thermal management control (corresponding to steps 110 to 150 described below).

[0058] The creation of the relationship algorithm can include: building a charging MAP table, creating a thermal management temperature threshold, calibrating and analyzing heat generation-heat exchange during charging, and calibrating a thermal management rate-charging rate matrix.

[0059] The application of thermal management control can include: pre-control period calculation, selecting the optimal charging rate and optimal cooling rate using an intelligent and efficient thermal management pre-control strategy, and realizing the fast charging of the battery system and the control of the thermal management system.

[0060] In this embodiment, before step 110, the method can further include a step of creating a charging MAP table and establishing a correspondence between temperature, SOC, charging rate, and thermal management rate. For example, before step 110, the method can further include:

[0061] Step 101, based on a set of calibration parameters corresponding to the battery system, create a charging MAP table, the set of calibration parameters including charging rates corresponding to the battery system at multiple SOCs and multiple temperatures;

[0062] Step 102, according to the temperature, charging current, heat generation power of the battery system, and heat exchange power of the thermal management system, establish a first energy curve corresponding to the temperature, charging current, and heat generation power of the battery system, and a second energy curve corresponding to the temperature, charging current of the battery system, and heat exchange power of the thermal management system;

[0063] Step 103, establish a relationship function of the charging rate, heat generation power of the battery system, and thermal management rate of the thermal management system;

[0064] Step 104, according to the relationship function, establish a thermal management rate-charging rate matrix;

[0065] Step 105, according to the charging MAP table, the first energy curve, the second energy curve, and the thermal management rate-charging rate matrix, establish the correspondence between temperature, SOC, charging rate, and thermal management rate.

[0066] The thermal management system can include a heating module, a liquid pump, a pipeline, etc., and can realize functions such as heating or cooling of the battery system. The pipeline is in contact with the battery cell of the battery system and is used for heat exchange with the battery system. For example, when the battery cell needs to be cooled, the liquid pump is started to transport the cooling liquid through the pipeline to reduce the temperature of the battery cell. When the battery cell needs to be heated, the heating module is started, at which time the heating module can heat the cooling liquid, and then the pipeline transmits heat to the battery cell to heat up the battery cell.

[0067] In step 101, the calibration parameter set includes the optimal charging rate corresponding to the battery system at a plurality of SOCs and a plurality of temperatures. The temperature generally refers to the temperature range in which the battery system can normally operate. For example, the working temperature of a conventional lithium ion battery is between -20°C and 60°C. Generally, the performance of the lithium ion battery will decrease when the temperature is lower than 0°C, and the discharge capacity will also decrease accordingly. The complete working temperature of the lithium ion battery is commonly 0-40°C.

[0068] As an example, the calibration parameter set can include the optimal charging rate corresponding to the battery system at the SOC values of 0, 20%, 40%, 60%, and 80% and the temperatures of -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, and 60°C. Then, based on the calibration parameter set of the SOC value, the temperature, and the corresponding optimal charging rate, a charging MAP table is created. The calibration parameter set of different models of battery systems can be different, and the corresponding charging MAP table can also be different.

[0069] In the calibration parameter set, the division granularity of each SOC value and temperature can be smaller, and is not limited to the above example. For example, the interval of the SOC is 10%, and the interval of the temperature is 5°C. The calibration parameter set is obtained by data collection on the power battery in the battery system by the tester, and the acquisition method of the calibration parameter set is a conventional method, which will not be described here.

[0070] In this embodiment, the method can also determine a temperature threshold for thermal management according to the charging MAP table. The main purpose of determining the temperature threshold is to ensure the maximum charging rate as much as possible, and therefore, cooling or heating needs to be started before the corresponding maximum charging rate (SOC-temperature ℃). The temperature threshold corresponding to different SOCs can be different, and the optimal starting temperature threshold and the flow rate (l / min) of the thermal management system at different SOCs can be obtained through simulation or testing. The temperature threshold is the target temperature in step 120.

[0071] In step 102, the acquisition method of the heat generation power of the battery system and the heat exchange power of the thermal management system is a conventional method, which can be obtained by measurement or simulation.

[0072] As an example, the first energy curve and the second energy curve can be seen fromFigure 2 In Figure 2 , the curve corresponding to the battery heat generation is the first energy curve, and the curve corresponding to the heat exchange amount of the thermal management system is the second energy curve. Figure 2 The horizontal axis is time (unit: second, symbol s), and the battery heat generation corresponds to the heat generation power, and the heat exchange amount of the thermal management system corresponds to the heat exchange power. In Figure 2 , an energy curve corresponding to the charging rate is also created to present the charging rate changing over time. Based on Figure 2 the heat generation and heat exchange curves (the first energy curve and the second energy curve) in Figure 2 , the balance point can be analyzed: the intersection point of the curves or the parallel section can be used as the heat exchange balance point, such as the intersection point marked in the energy curve in

[0073] In step 103, the relationship function can be expressed as: Rate = F(Q)(Thermal), where Rate refers to the charging rate, Q refers to the heat generation power, and Thermal refers to the thermal management rate, which can be the cooling rate or the heating rate.

[0074] In step 104, generally, the large-rate charging stage in the direct-current charging process corresponds to a large heat generation, so the heat exchange demand of the thermal management system in this stage, i.e., the corresponding cooling rate, should be greater than the cooling rate of the balance point, so as to take away enough heat to maintain or reduce the temperature, thereby guaranteeing the maximum charging rate. Continuing the direct-current charging, generally, the charging rate of the battery will gradually decrease at the end of the SOC (at this time, low-rate charging can be used to ensure sufficient charging of electricity), so the heat generation of the battery in this stage will also decrease, and the heat exchange demand of the thermal management system will also decrease, so the cooling rate can also decrease. In this way, on the one hand, the cooling demand is met, and on the other hand, it is beneficial to reduce the power consumption in the cooling process. According to this logic, the elements of the thermal management rate-charging rate matrix can be calibrated in combination with the relationship function, and then the rate matrix can be created based on the elements of the matrix. As an example, the table form of the rate matrix can be as shown in Table 1.

[0075] Table 1:

[0076]

[0077] After obtaining the thermal management rate-charging rate matrix, by arranging the charging MAP table, the first energy curve, the second energy curve, and the corresponding relationship of the battery system temperature, SOC, charging rate, and the thermal management rate of the thermal management system in the thermal management rate-charging rate matrix, the corresponding relationship of the temperature, SOC, charging rate, and the thermal management rate can be obtained. The corresponding relationship can be understood as an index or mapping relationship.

[0078] As an example, a portion of the contents of the created charging MAP table can be shown in Table 2 below.

[0079] Table 2:

[0080] Temperature / SOC 30％ 40％ 50％ 25℃ 2C 1.8C 1.6C 30℃ 1.5C 1.3C 1.0C

[0081] In this embodiment, the correspondence between temperature, SOC, and charging rate and thermal management rate can be represented by a relationship table. For example, some of the correspondences can be shown in Table 3 below, where C refers to the unit or exponent of the charging rate, X refers to the unit or exponent of the thermal management rate, and the thermal management rate in Table 3 refers to the cooling rate.

[0082] Table 3:

[0083] Charge rate, thermal management rate 30％ 40％ 50％ 25℃ (2C, 1.2X) 30℃ (1.3C, 0.8X)

[0084] It should be noted that the parameters in Tables 2 and 3 may differ for different models of battery systems and thermal management systems. The parameters in Tables 2 and 3 in this embodiment are only examples to facilitate understanding of the implementation process of the method.

[0085] In step 110, the current parameter set of the battery system is obtained in a conventional way, which will not be described in detail here.

[0086] In step 120, it is understood that upon obtaining the current SOC of the battery system, the SOC value at the starting point of the next charging stage can be determined. For example, in Table 2, if the current SOC is any value in [30%, 40%), such as 30%, then the SOC range for the next charging stage is [40%, 50%). That is, the SOC value at the starting point of the next charging stage is 40%. Furthermore, the target temperature corresponding to the optimal charging rate at an SOC of 40% can be determined using the charging MAP table. This target temperature is the temperature threshold used for battery system temperature regulation.

[0087] In this embodiment, the optimal charging rate is not necessarily the maximum charging rate. For example, considering extreme temperature environments, such as high-temperature environments (e.g., ambient temperature exceeding 35°C), if the thermal management system cannot cool the battery system below 35°C, then the lowest temperature at which the battery system is cooled by the thermal management system at its maximum cooling rate can be taken as the target temperature. The optimal charging rate is then determined based on this target temperature, the SOC at the start of the next charging stage, and the charging MAP table.

[0088] In step 130, after obtaining the optimal charging rate, target temperature, and SOC value at the starting point, the desired thermal management rate that enables the battery system to be charged at the optimal charging rate and target temperature can be found through the correspondence (refer to Table 3).

[0089] It can be understood that the expected thermal management ratio is a cooling ratio if the current temperature is higher than the target temperature, and the expected thermal management ratio is a heating ratio if the current temperature is lower than the target temperature.

[0090] Step 140 can include:

[0091] Before the current SOC of the battery system reaches the next charging stage, based on the current temperature, the time length required for the temperature of the battery system to reach the target temperature by the thermal management system is estimated according to a value range of a thermal management ratio of the thermal management system;

[0092] Interpolation operation is performed according to the current thermal management ratio of the thermal management system and the expected thermal management ratio;

[0093] Based on the time length and the thermal management ratio obtained by interpolation, the thermal management system is controlled to operate.

[0094] It can be understood that, in order to estimate and control the charging ratio and the thermal management ratio of the next charging stage in advance, the optimal charging path (i.e., the high-temperature / low-temperature charging path formed according to the charging MAP table) calibrated by pre-simulation or test results needs to be combined, and the time length required for cooling or heating to the target temperature in the next charging stage is calculated according to the cooling / heating capacity (i.e., the thermal management ratio), which is used as the time period for early control in different stages. When the current SOC of the battery system reaches the next charging stage, it generally indicates that the temperature of the battery has reached the target temperature, thereby realizing the pre-judgment and pre-control of thermal management.

[0095] In step 150, when the current SOC of the battery system reaches the next charging stage, the thermal management ratio of the thermal management system can be completely switched to the expected thermal management ratio.

[0096] In this embodiment, the method can further include: when the expected thermal management ratio is a cooling ratio, and within a preset time period, the charging ratio of the battery system is reduced, and the heat generation power of the battery system is less than a preset power threshold, the cooling ratio of the thermal management system is controlled to be reduced.

[0097] It can be understood that, in general, during high-temperature charging, the charging ratio of the battery will gradually decrease at the end of SOC (i.e., the value near 100% of SOC), and low-rate charging is used to ensure sufficient charging of electricity. Therefore, the heat generation of the battery in this stage is also reduced, and the heat exchange demand of the thermal management system is also reduced, so the cooling ratio can be reduced. In this way, on the one hand, the cooling demand can be met, and on the other hand, the power consumption in the cooling process can be reduced.

[0098] In this embodiment, the method can further include:

[0099] By the charging MAP table, an optimal charging path corresponding to the current temperature and the current SOC of the battery system is determined, and a charging request is sent to a charging station based on the optimal charging path, so that the charging station charges the battery system in the optimal charging path.

[0100] In the charging process of the battery system, the above method can be used to realize the comprehensive calculation of the optimal thermal management rate and the optimal charging rate, and form an intelligent and efficient thermal management pre-control value strategy. For example, the cooling rate intelligently changes with the change of the charging rate of the battery system during the charging process: the cooling rate in the next charging stage is estimated through the charging path. When the charging rate is large, the cooling is started as needed to ensure that the charging rate meets the maximum value at the present stage; when the charging rate decreases, the cooling rate can be adaptively reduced to reduce power consumption.

[0101] Please refer to Figure 3 The application also provides a thermal management control device based on battery fast charging, referred to as a thermal management control device 200. The device includes at least one software function module that can be stored in the form of software or firmware (Firmware) in a storage module or solidified in an electronic device operating system (Operating System, OS). The processing module is used to execute the executable modules stored in the storage module, such as the software function modules and computer programs included in the thermal management control device 200.

[0102] The thermal management control device 200 includes an acquisition unit 210, a first determination unit 220, a second determination unit 230, and a control unit 240, which have the following functions:

[0103] The acquisition unit 210 is configured to acquire a current parameter set of a battery system, wherein the current parameter set includes a current temperature and a current SOC;

[0104] The first determination unit 220 is configured to determine, according to a pre-created charging MAP table, an optimal charging rate of a starting point of a next charging stage of the battery system and a target temperature corresponding to the optimal charging rate, wherein the next charging stage is a SOC range after a charging stage in which the current SOC is located.

[0105] The second determination unit 230 is configured to determine, according to a pre-created correspondence relationship among temperature, SOC, charging rate, and thermal management rate, an expected thermal management rate of a thermal management system for charging the battery system at the optimal charging rate and the target temperature at the starting point, wherein the thermal management system is configured to adjust the temperature of a battery in the battery system, and the expected thermal management rate is a cooling rate or a heating rate.

[0106] The control unit 240 is configured to, before the current SOC of the battery system reaches the next charging stage, perform interpolation operation according to the current thermal management multiple of the thermal management system and the expected thermal management multiple, and control the thermal management system to operate based on the thermal management multiple obtained through the interpolation operation.

[0107] The control unit 240 is further configured to, when the current SOC of the battery system reaches the next charging stage, control the thermal management system to operate based on the expected thermal management multiple.

[0108] Optionally, the thermal management control device 200 can further include a creating unit, a first establishing unit, a second establishing unit, a third establishing unit and a fourth establishing unit. Before the obtaining unit 210 obtains the current parameter set of the battery system, the creating unit is configured to create a charging MAP table based on a calibration parameter set corresponding to the battery system, the calibration parameter set including charging multiples of the battery system corresponding to a plurality of SOCs and a plurality of temperatures.

[0109] The first establishing unit is configured to establish, according to the temperature, the charging current, the heat generation power of the battery system and the heat exchange power of the thermal management system, a first energy curve corresponding to the temperature, the charging current and the heat generation power of the battery system, and a second energy curve corresponding to the temperature, the charging current of the battery system and the heat exchange power of the thermal management system.

[0110] The second establishing unit is configured to establish a relationship function of the charging multiple, the heat generation power of the battery system and the thermal management multiple of the thermal management system.

[0111] The third establishing unit is configured to establish, according to the relationship function, a thermal management multiple-charging multiple matrix.

[0112] The fourth establishing unit is configured to establish, according to the charging MAP table, the first energy curve, the second energy curve and the thermal management multiple-charging multiple matrix, the correspondence relationship between the temperature, the SOC, the charging multiple and the thermal management multiple.

[0113] Optionally, the control unit 240 can be further configured to:

[0114] Before the current SOC of the battery system reaches the next charging stage, based on the current temperature, estimate a time length required for the temperature of the battery system to reach the target temperature through the thermal management system according to a value range of the thermal management multiple of the thermal management system.

[0115] Perform interpolation operation according to the current thermal management multiple of the thermal management system and the expected thermal management multiple.

[0116] Based on the time length and the thermal management ratio obtained by interpolation, the thermal management system is controlled to operate.

[0117] Optionally, the control unit 240 can also be configured to control the cooling ratio of the thermal management system to decrease when the expected thermal management ratio is a cooling ratio, and within a preset time period, the charging ratio of the battery system decreases, and the heat generation power of the battery system is less than a preset power threshold.

[0118] Optionally, the thermal management control device 200 can further include a third determination unit configured to determine an optimal charging path corresponding to the current temperature and the current SOC of the battery system through the charging MAP table, and send a charging request to a charging station based on the optimal charging path, so that the charging station charges the battery system in the optimal charging path.

[0119] In the embodiment, the processing module can be an integrated circuit chip having a signal processing capability. The processing module can be a general processor. For example, the processor can be a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0120] The storage module can be, but is not limited to, a random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, etc. In the embodiment, the storage module can be configured to store the charging MAP table, the correspondence between the temperature, the SOC, the charging ratio and the thermal management ratio, etc. Of course, the storage module can also be configured to store a program, and the processing module executes the program after receiving an execution instruction.

[0121] It should be noted that those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the electronic device described above can refer to the corresponding process of each step in the foregoing method, which will not be described in more detail here.

[0122] The embodiments of the present application also provide a computer readable storage medium. The computer readable storage medium stores a computer program, and when the computer program runs on a computer, the computer executes the thermal management control method as described in the foregoing embodiments.

[0123] Those skilled in the art can clearly understand that the present application can be implemented by hardware, or by means of software and necessary universal hardware platform, based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.), and includes a plurality of instructions for causing a computer device (which can be a personal computer, an electronic device, or a network device, etc.) to execute the methods described in various implementation scenarios of the present application.

[0124] To sum up, the embodiments of the present application provide a battery fast charging based thermal management control method and device and electronic equipment. In the present scheme, according to the pre-created charging MAP table, the optimal charging rate of the starting point of the next charging stage of the battery system and the target temperature corresponding to the optimal charging rate are determined; before the current SOC of the battery system reaches the next charging stage, interpolation operation is performed according to the current thermal management rate and the expected thermal management rate of the thermal management system, and the thermal management system is controlled to operate based on the thermal management rate obtained by interpolation; when the current SOC of the battery system reaches the next charging stage, the thermal management system is controlled to operate based on the expected thermal management rate. In this way, through pre-judgment and pre-control, a pre-control strategy of intelligent and efficient thermal management is formed, which can finely adjust the temperature of the battery system, so that the battery system reaches the comfortable temperature of fast charging, which is conducive to fully exerting the charging capacity of the battery system and improving the charging efficiency.

[0125] In the embodiments provided by the present application, it should be understood that the disclosed apparatus, system and method can also be implemented by other ways. The embodiments of the apparatus, system and method described above are only schematic, and for example, both the flowchart and the block diagram of the embodiment of the system, method and computer program product according to the present application illustrate the possible implementation modes of the system, method and computer program product, and function and operation of the embodiments of the present application. In this regard, each block in the flowchart or block diagram can represent a module, a segment or a part of code, which contains one or more executable instructions for implementing the specified logic function. It should also be noted that each block in the flowchart or block diagram, as well as a combination of blocks in the flowchart or block diagram, can be implemented by a dedicated hardware-based system, or can be implemented by a combination of special-purpose hardware and computer instructions. In addition, each functional module in the embodiments of the present application can be integrated together to form a separate part, or each functional module can exist independently, or two or more functional modules can be integrated to form a separate part.

[0126] The above merely provides an example of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A thermal management control method based on fast battery charging, characterized in that, The method includes: Obtain the current parameter set of the battery system, wherein the current parameter set includes the current temperature and the current state of charge (SOC); Based on a pre-created charging MAP table, the optimal charging rate and the target temperature corresponding to the optimal charging rate at the starting point of the next charging stage of the battery system are determined, wherein the next charging stage is a SOC range after the current SOC charging stage. Based on a pre-established correspondence between temperature, SOC, charging rate, and thermal management rate, the desired thermal management rate is determined so that the thermal management system charges the battery system at the optimal charging rate and the target temperature at the starting point. The thermal management system is used to regulate the temperature of the batteries in the battery system, and the desired thermal management rate is either a cooling rate or a heating rate. Before the current SOC of the battery system reaches the next charging stage, an interpolation calculation is performed based on the current thermal management ratio and the desired thermal management ratio of the thermal management system, and the operation of the thermal management system is controlled based on the interpolated thermal management ratio. When the current SOC of the battery system reaches the next charging stage, the thermal management system is controlled to operate based on the desired thermal management rate; The method further includes, before obtaining the current parameter set of the battery system: Based on the calibration parameter set corresponding to the battery system, a charging MAP table is created. The calibration parameter set includes the charging rate of the battery system at multiple SOCs and multiple temperatures. Based on the temperature, charging current, heat generation power of the battery system and the heat exchange power of the thermal management system, a first energy curve corresponding to the temperature, charging current and heat generation power of the battery system, and a second energy curve corresponding to the temperature, charging current and heat exchange power of the battery system and the thermal management system are established. Establish a relationship function between the charging rate of the battery system, the heat generation power, and the thermal management rate of the thermal management system; Based on the aforementioned relationship function, establish a thermal management rate-charging rate matrix; Based on the charging MAP table, the first energy curve, the second energy curve, and the thermal management rate-charging rate matrix, establish the correspondence between temperature, SOC, charging rate, and thermal management rate.

2. The method according to claim 1, characterized in that, Before the current SOC of the battery system reaches the next charging stage, an interpolation calculation is performed based on the current thermal management rate and the desired thermal management rate of the thermal management system, and the operation of the thermal management system is controlled based on the interpolated thermal management rate, including: Before the current SOC of the battery system reaches the next charging stage, based on the current temperature and according to the range of the thermal management rate of the thermal management system, the time required for the thermal management system to bring the temperature of the battery system to the target temperature is estimated. Interpolation is performed based on the current thermal management ratio of the thermal management system and the desired thermal management ratio; The operation of the thermal management system is controlled based on the duration and the interpolated thermal management ratio.

3. The method according to claim 1, characterized in that, If the current temperature is higher than the target temperature, the desired thermal management ratio is the cooling ratio; if the current temperature is lower than the target temperature, the desired thermal management ratio is the heating ratio.

4. The method according to claim 3, characterized in that, The method further includes: When the desired thermal management ratio is the cooling ratio, and within a preset time period, the charging ratio of the battery system decreases, and the heat generation power of the battery system is less than a preset power threshold, the cooling ratio of the thermal management system is controlled to decrease.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: The optimal charging path corresponding to the current temperature and current SOC of the battery system is determined using the charging MAP table, and a charging request is sent to the charging station based on the optimal charging path so that the charging station charges the battery system using the optimal charging path.

6. A thermal management control device based on fast battery charging, characterized in that, The device includes: An acquisition unit is used to acquire the current parameter set of the battery system, wherein the current parameter set includes the current temperature and the current state of charge (SOC); The first determining unit is used to determine the optimal charging rate of the battery system at the starting point of the next charging stage and the target temperature corresponding to the optimal charging rate according to a pre-created charging MAP table, wherein the next charging stage is a SOC range after the charging stage where the current SOC is located. The second determining unit is used to determine, based on a pre-established correspondence between temperature, SOC, charging rate, and thermal management rate, the desired thermal management rate at the starting point for the thermal management system to charge the battery system at the optimal charging rate and the target temperature, wherein the thermal management system is used to regulate the temperature of the batteries in the battery system, and the desired thermal management rate is a cooling rate or a heating rate. The control unit is configured to perform interpolation calculations based on the current thermal management ratio and the desired thermal management ratio of the thermal management system before the current SOC of the battery system reaches the next charging stage, and control the operation of the thermal management system based on the interpolated thermal management ratio. The control unit is also configured to control the operation of the thermal management system based on the desired thermal management rate when the current SOC of the battery system reaches the next charging stage; The device further includes a creation unit, a first establishment unit, a second establishment unit, a third establishment unit, and a fourth establishment unit; Before the acquisition unit acquires the current parameter set of the battery system, the creation unit is used to create a charging MAP table based on the calibration parameter set corresponding to the battery system. The calibration parameter set includes the charging rate of the battery system at multiple SOCs and multiple temperatures. The first establishing unit is used to establish a first energy curve corresponding to the temperature, charging current and heating power of the battery system, and a second energy curve corresponding to the temperature, charging current and heating power of the battery system and the heat exchange power of the thermal management system, based on the temperature, charging current and heating power of the battery system and the heat exchange power of the thermal management system. The second establishing unit is used to establish the relationship function between the charging rate of the battery system, the heat generation power, and the thermal management rate of the thermal management system; The third establishing unit is used to establish a thermal management rate-charging rate matrix based on the relationship function; The fourth establishing unit is used to establish the correspondence between temperature, SOC and charging rate and thermal management rate based on the charging MAP table, the first energy curve, the second energy curve, and the thermal management rate-charging rate matrix.

7. An electronic device, characterized in that, The electronic device includes a processor and a memory coupled together, the memory storing a computer program that, when executed by the processor, causes the electronic device to perform the method as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when run on a computer, causes the computer to perform the method as described in any one of claims 1-5.

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