Battery charging management control method and device, electronic equipment and storage medium

Abstract

The invention belongs to the technical field of new energy batteries, and provides a battery charging management control method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the current temperature of a battery and a charging performance parameter under the condition of a current charging progress value under the condition that the battery is connected to a charging pile for charging, the battery temperature of the battery at the moment is dynamically adjusted by combining the power supply performance of the charging pile and the current charging performance parameter of the battery at the moment, so that the current charging performance of the battery can be influenced, and the current charging performance of the battery is matched with the power supply performance of the charging pile by performing reasonable thermal management control on the battery in the charging process; the charging efficiency is improved and the charging time is shortened.

Description

Technical Field

[0001] This application belongs to the field of new energy battery technology, and in particular relates to a battery charging management and control method, device, electronic device and storage medium. Background Technology

[0002] The performance of new energy batteries varies with battery temperature and SOC (State of Charge). When new energy batteries are connected to charging piles, the charging capacity of the charging piles is relatively fixed. This may result in a mismatch between battery performance and charging pile capacity, leading to low charging efficiency, increased charging time, and a poor user experience. Summary of the Invention

[0003] This invention provides a battery charging management and control method, device, electronic device, and storage medium, aiming to solve the technical problem that the charging performance of the battery may not be compatible with the functional performance of the charging pile after the new energy vehicle is connected to the charging pile.

[0004] In a first aspect, embodiments of this application provide a battery charging management and control method, the method comprising:

[0005] When the battery is connected to a charging station, determine the current battery status, which includes the current temperature and the current charging progress value;

[0006] Obtain the power supply performance parameters of the charging pile;

[0007] Obtain the current charging performance parameters of the battery in the current battery state;

[0008] The current temperature of the battery is adjusted based on the current charging performance parameters and the current power supply performance parameters.

[0009] In this embodiment, when the battery is connected to a charging pile for charging, the charging performance parameters of the battery at the current temperature and current state of charge (SOC) are obtained. The battery temperature is dynamically adjusted by combining the power supply performance of the charging pile with the current charging performance parameters of the battery, thereby affecting the current charging performance of the battery. By performing reasonable thermal management control on the battery during the charging process, the current charging performance of the battery is matched with the power supply performance of the charging pile, thereby improving charging efficiency and shortening charging time.

[0010] In some embodiments, obtaining the current charging performance parameters of the battery in the current battery state includes:

[0011] The current charging performance parameters of the battery under the current battery state are retrieved from the battery charging table; wherein, the battery charging table includes the correspondence between the battery state and the charging performance parameters, and the battery state includes a combination of battery temperature range and battery charging progress range.

[0012] In this embodiment, a pre-established correspondence between the combination of battery temperature range and battery charging progress range and charging performance parameters is established. This facilitates the electronic device to accurately obtain the current charging performance parameters at the current moment by looking up the table based on the correspondence during the subsequent charging process of the new energy battery.

[0013] In some embodiments, adjusting the current temperature of the battery based on the current charging performance parameters and the power supply performance parameters includes:

[0014] When the battery is in a charging state, the current charging performance parameters and the power supply performance parameters are compared to obtain a performance comparison result;

[0015] The current temperature of the battery is adjusted based on the performance comparison results.

[0016] In this embodiment of the application, when the battery is connected to a charging pile and is in a charging state, the charging performance of the battery at this moment is obtained under the conditions of battery temperature and remaining power. The power supply performance of the charging pile is compared with the charging performance of the battery at this moment in real time. Based on the performance comparison results, reasonable thermal management control is performed on the battery during the charging process to reduce the limitations of excessive energy consumption or inability to fully utilize the battery's performance.

[0017] In some embodiments, the method further includes:

[0018] Obtain a first power supply adjustment factor, and adjust the power supply performance parameters based on the first power supply adjustment factor to obtain a first power supply reference parameter;

[0019] Adjusting the current temperature of the battery based on the performance comparison results includes:

[0020] If the current charging performance parameter is less than the first power supply reference parameter, the current temperature of the battery is adjusted according to a preset first thermal control method.

[0021] In this embodiment of the application, by setting a first power supply reference parameter, it is possible to ensure that during the battery charging process, when the current charging performance parameter is slightly less than the power supply performance parameter of the charging pile, the current temperature of the battery is adjusted according to a preset first thermal control method, thereby reducing the waste of the power supply capacity of the charging pile.

[0022] In some embodiments, the method further includes:

[0023] Obtain a second power supply adjustment factor, and adjust the power supply performance parameters based on the second power supply adjustment factor to obtain a second power supply reference parameter;

[0024] Adjusting the current temperature of the battery based on the performance comparison results further includes:

[0025] If the current charging performance parameters are not less than the second power supply reference parameters, the current temperature of the battery is adjusted according to the preset second thermal control method.

[0026] In this embodiment of the application, by setting a second power supply reference parameter, it is possible to ensure that during the battery charging process, when the current charging performance parameter is slightly greater than the power supply performance parameter of the charging pile, the current temperature of the battery is adjusted according to a preset second thermal control method to reduce the waste of charging energy.

[0027] In some embodiments, the method further includes:

[0028] When the battery is connected to the charging pile but is not in a charging state, the candidate charging performance parameters of the battery in each battery state are traversed from the battery charging table based on the correspondence.

[0029] The candidate charging performance parameters that have been traversed are compared with the power supply performance parameters, a target charging performance parameter that is smaller than the power supply performance parameter is selected, and the target charging progress interval corresponding to the target charging performance parameter is obtained from the battery charging table.

[0030] Before the battery enters the charging state and before the current charging progress value reaches the target charging progress range, or before the current charging progress value reaches the target charging progress range, the current temperature of the battery is adjusted according to a preset first thermal control method.

[0031] In this embodiment, the operating state of the battery under conditions of no thermal management can be simulated in advance after the battery is connected to the charging pile and before the battery is officially charged: by looking up the battery charging table, each (candidate) charging performance parameter under the combined conditions of battery temperature range and SOC range (battery state) is obtained, and each candidate charging performance parameter is compared with the power supply performance parameter of the charging pile. If the candidate charging performance parameter is lower than the power supply performance parameter in a certain SOC range, the timing of thermal management can be predicted in advance and thermal management control can be activated in advance to reduce the limitation that the battery performance cannot be fully utilized during the charging process.

[0032] In some embodiments, the method further includes:

[0033] When the battery is charging, find the second battery temperature range of the next stage that is adjacent to the battery temperature range where the current temperature is located from the battery charging table.

[0034] Calculate the first time required for the battery to reach the second battery temperature range from the current temperature, and look up the first charging performance parameter of the battery when it reaches the second battery temperature range from the battery charging table;

[0035] Find the second charging progress interval of the next stage that is adjacent to the battery charging progress interval where the current charging progress value is located from the battery charging progress table;

[0036] Calculate the second time required for the battery to reach the second charging progress interval from the current charging progress value, and look up the second charging performance parameter of the battery when it reaches the second charging progress interval from the battery charging table;

[0037] Compare the first duration and the second duration to obtain the duration comparison result;

[0038] Based on the duration comparison results, the charging performance parameters to be compared are determined from the first charging performance parameter and the second charging performance parameter;

[0039] If the charging performance parameter to be compared is less than the power supply performance parameter, the battery temperature is adjusted to enter the next charging stage according to the preset first thermal control method during the current charging stage.

[0040] In this embodiment of the application, during the battery charging process, the specific charging performance parameters of the battery to be compared in the next charging stage are viewed by comparing the time length. The specific charging performance parameters to be compared in the next stage are compared with the power supply performance parameters of the charging pile. Based on the comparison results, the battery temperature is adjusted in advance to enter the next stage, thereby further reducing the energy consumption of battery charging energy or charging pile power supply capacity.

[0041] In some embodiments, determining the charging performance parameter to be compared from the first charging performance parameter and the second charging performance parameter based on the duration comparison result includes:

[0042] If the first duration is less than the second duration, the first charging performance parameter is selected as the charging performance parameter to be compared with the power supply performance parameter.

[0043] If the second time is less than the first time, the second charging performance parameter is selected as the charging performance parameter to be compared with the power supply performance parameter.

[0044] In this embodiment, selecting a charging performance parameter that takes a shorter time to reach the next interval can more accurately predict the battery charging performance in the next stage.

[0045] In some embodiments, obtaining the power supply performance parameters of the charging pile includes:

[0046] The power demand or current demand is sent to the charging pile, so that the charging pile can provide feedback on the power supply performance parameters based on the power demand or current demand.

[0047] In this embodiment of the application, the charging pile can feed back appropriate power supply performance parameters to the battery management system according to the power demand or current demand, which helps to ensure the charging efficiency of the battery.

[0048] Secondly, this application also proposes a battery charging management control device, comprising:

[0049] The battery status acquisition unit is used to determine the current battery status when the battery is connected to a charging pile. The current battery status includes the current temperature and the current charging progress value.

[0050] A charging pile performance acquisition unit is used to acquire the power supply performance parameters of the charging pile.

[0051] A battery performance acquisition unit is used to acquire the current charging performance parameters of the battery in the current battery state.

[0052] A thermal management control unit is used to adjust the current temperature of the battery based on the current charging performance parameters and the current power supply performance parameters.

[0053] Thirdly, this application also proposes an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect above.

[0054] Fourthly, this application also proposes a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect above.

[0055] It should be noted that for the beneficial effects of the second to fourth aspects mentioned above, please refer to the description of the beneficial effects of the first aspect mentioned above. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 A schematic flowchart illustrating an embodiment of a battery charging management and control method provided in this application;

[0058] Figure 2 A schematic diagram of a battery charging meter provided in an embodiment of this application;

[0059] Figure 3 This is a flowchart illustrating an embodiment of the battery charging management and control method of this application.

[0060] Figure 4 This provides another example flowchart for Embodiment 1 of the battery charging management and control method of this application;

[0061] Figure 5 This is a flowchart illustrating Embodiment 2 of the battery charging management and control method of this application.

[0062] Figure 6 This is a flowchart illustrating Embodiment 2 of the battery charging management and control method of this application.

[0063] Figure 7 A simplified structural diagram of the electronic device provided in the embodiments of this application. Detailed Implementation

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0065] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0066] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0067] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), unless otherwise expressly and specifically defined.

[0068] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0069] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0070] The inventors of this application have noted that existing battery thermal management technologies primarily determine whether to activate heating or cooling by assessing battery temperature and state of charge (SOC). Simply put, heating is activated when the battery temperature is below a certain fixed temperature, and cooling is activated when the battery temperature is above a certain fixed temperature. While this general technical solution in the prior art can, to some extent, maintain the battery within a comfortable temperature range, ensuring battery performance and lifespan, this thermal management control method only focuses on the battery and neglects the external charging station, failing to act as a bridge between the two. The control is relatively crude and has limitations such as excessive energy consumption or inability to fully utilize performance. Specific drawbacks are as follows:

[0071] Defect 1 "Excessive thermal management energy consumption": The charging pile has relatively low performance. Since the battery's initial temperature is relatively high, the battery's charging performance is already stronger than that of the charging pile. At this point, it is meaningless to continue heating to enhance the battery's performance. However, since the preset target temperature has not been reached, conventional thermal management methods will continue to heat the battery, thus wasting energy.

[0072] Defect 2: "Excessive thermal management energy consumption". The battery starts at a relatively low temperature, so heating is activated. Conventional thermal management methods have a fixed heating cutoff temperature, which is independent of the charging station's capacity. This can easily cause overheating, raising the battery temperature too high and wasting energy.

[0073] Defect 3: "Battery performance cannot be fully utilized". The battery's initial temperature is relatively low, so heating is activated. Conventional thermal management methods have a fixed heating cutoff temperature, which is independent of the charging station's capacity. When the current charging station's capacity is relatively strong, the preset fixed heating cutoff temperature may not be sufficient, resulting in battery performance being lower than the charging station's performance and wasting the charging station's capacity.

[0074] To address the aforementioned technical problems, this application proposes a technical solution for battery charging management and control, including a method, device, electronic equipment, and storage medium. This solution enables the battery performance to be adjusted through thermal management to match the performance of the charging pile, thereby improving charging efficiency and shortening charging time.

[0075] To illustrate the technical solutions proposed in the embodiments of this application, specific embodiments are described below.

[0076] Example 1

[0077] Please see Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of a battery charging management and control method provided in this application. It should be noted that this embodiment is applicable to various devices equipped with new energy batteries, including vehicles such as new energy vehicles, new energy aircraft, new energy ships, and electric vehicles, as well as devices such as robots, smartphones, and computers. This embodiment uses a new energy vehicle as an example for illustration.

[0078] The battery charging management control method of this application embodiment is applied to the processor of a vehicle. The processor of a new energy vehicle belongs to ECU (electronic control unit) or BMS (battery management system). The execution subject of the method of this application embodiment is the BMS battery management system, and the method mainly includes the following steps S10 to S40:

[0079] Step S10: When the battery is connected to the charging pile, determine the current battery status (the current battery status includes the current temperature and the current charging progress value) and obtain the power supply performance parameters of the charging pile.

[0080] It should be noted that the battery charging management and control method in this application is mainly applied to the scenario of a vehicle connecting to a charging pile. When a new energy vehicle detected by the BMS connects to a charging pile, the current temperature and current charging progress value (i.e., the battery's SOC) of the new energy battery at the current time k are automatically obtained.

[0081] In practical implementation, when a vehicle plugs into the charging cable of a charging station, there is a communication protocol between the vehicle and the charging station. The BMS (Battery Management System) will send a power request or a current request to the charging station. Taking the power request as an example, after receiving the power request initiated by the vehicle, the charging station will send back the power supply performance parameters provided by the charging station to the vehicle. The power supply performance parameters can be understood as the maximum power (or maximum current) that the charging station can provide. Different charging stations have different maximum power (or maximum current). In this embodiment, the maximum allowable power supply is used as the power supply performance parameter of the charging station: for example, if the power request initiated by the vehicle is 7kW and the charging station is a slow charging station with a maximum power supply of 6.6kW, then after responding to the 7kW power request initiated by the vehicle, the charging station will establish a handshake protocol with the BMS and send back the power supply performance parameters of 6.6kW; or, if the power request initiated by the vehicle is 230kW and the charging station is a fast charging station with a maximum power supply of 240kW, then the power supply performance parameters sent back by the charging station after responding to the 230kW power request initiated by the vehicle are 230kW.

[0082] Step S20: Obtain the current charging performance parameters of the battery in its current battery state;

[0083] In a specific implementation, the BMS can look up the current charging performance parameters of the battery in its current battery state from the battery charging table; wherein, the battery charging table includes the correspondence between the battery state and the charging performance parameters, and the battery state includes a combination of battery temperature range and battery charging progress range.

[0084] It is understood that the battery charging meter described in this application embodiment can be obtained by testing the new energy battery before it leaves the factory. Specifically, the charging performance parameters of the new energy battery under a certain combination of battery temperature range and SOC (battery charging progress) range are obtained through testing. Battery temperature and SOC (battery charging progress) characterize the battery state, and a correspondence between battery state (battery temperature + SOC) and charging performance parameters is established. The battery charging meter containing the above correspondence is written into the BMS battery management system. In this way, after the new energy battery leaves the factory, when the user charges the new energy battery of the vehicle through a charging pile, the battery management system obtains the (known) current temperature and current charging progress values ​​detected by relevant sensors. Based on this, the system can retrieve the (unknown) current charging performance parameters corresponding to the current battery state (i.e., the combination of the known current temperature and current charging progress values) from the battery charging meter by calling the correspondence in the vehicle-side software module. (Reference) Figure 2 , Figure 2This is a schematic diagram of a battery charging meter provided in an embodiment of this application. The battery charging performance is determined by a step-by-step lookup table (look down from temperature / look down from SOC). In this embodiment of the application, the maximum allowable charging current of the battery is used as the charging performance parameter of the battery. Specifically, the battery charging performance is related to the battery's own temperature and remaining SOC. The maximum allowable charging current can be obtained by looking up the temperature / SOC combination of the battery charging meter (in practical applications, the actual charging current must be ≤ the maximum allowable charging current).

[0085] In this application embodiment, the battery charging process can be described as follows: the battery charging gun is inserted into the charging pile - communication is established - the BMS obtains the charging pile's capability (power or current) & the BMS looks up the allowed charging current (i.e., the current charging performance parameters) based on the current battery temperature and SOC, and reaches an agreement. After the software program of the BMS and the charging pile establishes a handshake, it sends the final charging current request, and finally the battery is charged with this current (i.e., the current charging performance parameters).

[0086] Step S30: Adjust the current temperature of the battery according to the current charging performance parameters and power supply performance parameters;

[0087] Understandably, although battery performance varies with temperature / SOC, the power supply capacity of the charging pile is relatively fixed. Ideally, the power supply capacity of the charging pile equals the battery charging capacity. In this embodiment, when the battery is connected to the charging pile for charging, the charging performance parameters of the battery at the current temperature and current charging progress value (SOC) are obtained. By combining the power supply performance of the charging pile with the current charging performance parameters of the battery, the battery temperature is dynamically adjusted, playing a bridging role in thermal management. This can influence the current charging performance of the battery. By implementing reasonable and intelligent thermal management control during the charging process, the current charging performance of the battery is matched with the power supply performance of the charging pile, so as to maximize the matching between the two, improve charging efficiency, and shorten charging time.

[0088] Furthermore, the thermal management control method corresponding to the embodiments of this application is further illustrated by the following embodiments:

[0089] Example 1

[0090] refer to Figure 3 In this embodiment of the application, step 30 further includes steps S31-S32:

[0091] Step S31: When the battery is in a charging state, compare the current charging performance parameters and power supply performance parameters to obtain the performance comparison results;

[0092] Step S32: Adjust the current temperature of the battery based on the performance comparison results.

[0093] Understandably, during the charging process of a new energy battery, the BMS in this embodiment can determine the relative strength of the battery's charging performance and the charging pile's power supply performance by using the power supply performance parameters of the charging pile and the battery's charging performance parameters at the current moment. Since the charging performance of a new energy battery is constantly changing during charging, corresponding to the State of Charge (SOC) (i.e., remaining battery capacity), the allowable charging current decreases as the SOC increases. Regarding battery temperature, the optimal operating range is 20℃-30℃. When the temperature is too high, charging performance is limited, necessitating cooling; when the temperature is too low, charging performance is also limited, necessitating heating. Therefore, in the specific implementation of this embodiment, the method further includes:

[0094] Obtain a first power supply adjustment factor, and adjust the power supply performance parameters based on the first power supply adjustment factor to obtain a first power supply reference parameter; obtain a second power supply adjustment factor, and adjust the power supply performance parameters based on the second power supply adjustment factor to obtain a second power supply reference parameter.

[0095] Accordingly, step S32 further includes:

[0096] Step S32A: When the current charging performance parameters are less than the first power supply reference parameters, adjust the current temperature of the battery according to the preset first thermal control method;

[0097] Specifically, in this embodiment, a first adjustment factor of 0.9 can be set to ensure that the current temperature of the battery is adjusted according to a preset first thermal control method when the current charging performance parameters are slightly less than the power supply performance parameters of the charging pile. The battery demand mode includes a heating mode and a cooling mode. In the heating mode scenario, the preset first thermal control method will raise the current temperature of the battery. In the cooling mode scenario, the preset first thermal control method will lower the current temperature of the battery.

[0098] Step S32B: If the current charging performance parameters are not less than the second power supply reference parameters, adjust the current temperature of the battery according to the preset second thermal control method.

[0099] Specifically, in this embodiment, a second adjustment factor of 1.1 can be set to ensure that the current temperature of the battery is adjusted according to a preset second thermal control method when the current charging performance parameters are slightly greater than the power supply performance parameters of the charging pile. In the heating mode scenario, the preset second thermal control method will not raise the current temperature of the battery. In the cooling mode scenario, the preset second thermal control method will not lower the current temperature of the battery.

[0100] refer to Figure 4The BMS compares the charging pile's power supply capacity with the battery's charging performance in real time. If the current charging performance parameter is less than the power supply performance parameter * 0.9, it enters thermal management (for example, in the heating mode scenario, increasing the battery temperature by 5° can enhance the battery's charging capacity) to reduce the waste of the charging pile's power supply capacity; if the current charging performance parameter is greater than or equal to the power supply performance parameter * 1.1, it exits thermal management to reduce the waste of charging energy.

[0101] In one example, for step S32A above, it also includes:

[0102] When the current charging performance of the battery is less than the power supply performance of the charging pile, the BMS can look up the charging performance parameters of the battery's current temperature in the adjacent battery temperature range in the battery charging table based on the correspondence. The adjacent battery temperature range with stronger charging performance corresponding to the charging performance parameters is taken as the target adjacent battery temperature range, and the current battery temperature is adjusted to the temperature of the target adjacent battery temperature range.

[0103] In other words, the BMS will determine whether the charging performance of the battery is enhanced or reduced in adjacent battery temperature ranges based on the current temperature. For example, increasing the current temperature by 5°C will determine the next battery temperature range, while decreasing the current temperature by 5°C will determine the previous battery temperature range.

[0104] If charging performance improves when the battery temperature increases by 5°C, it indicates the battery is currently in a low-temperature phase, thus requiring heating to raise its temperature (i.e., the first thermal control method is temperature rise control). If charging performance decreases when the temperature increases by 5°C, it indicates the battery is currently in a high-temperature phase, meaning charging performance improves when the temperature decreases by 5°C, thus requiring cooling to bring the battery temperature up to the previous battery temperature range (i.e., the first thermal control method is temperature drop control).

[0105] The embodiments of this application can determine the specific thermal control method based on the charging performance parameters of the battery under adjacent battery temperature ranges when the current charging performance of the battery is less than the power supply performance of the charging pile, thereby making thermal management control more accurate and reasonable.

[0106] Example 2

[0107] Further, refer to Figure 5In the thermal management control method of this application embodiment, before the battery is connected to the charging pile and officially begins charging, the battery management system (BMS) calculates the battery temperature curve under conditions of no thermal management throughout the charging process, and calculates the allowable charging power curve by combining the battery's remaining state of charge (SOC) (i.e., charging progress). This curve is then compared with the charging pile's power supply performance curve (a straight line). If the power supply performance curve is lower than the charging pile's power supply performance curve in a certain SOC range, thermal management is activated in advance. The relevant method includes the following steps S031-S033:

[0108] Step S031: When the battery is connected to the charging pile but is not in a charging state, traverse the candidate charging performance parameters of the battery in each battery state from the battery charging table based on the corresponding relationship.

[0109] It is understood that during the charging process, the battery's SOC will change with the increase of charging time (including SOC1, SOC2, SOC3... SOC). n Furthermore, the temperature T also changes with increasing charging time (including multiple temperature nodes T1, T2, T3…T). n The maximum allowable power will also change accordingly, therefore the battery charging performance F (maximum charging power) will also be different for different T / SOC combinations during charging; the corresponding relationship is: in the battery charging table, each unique combination of battery temperature and remaining battery capacity (T1 / SOC1, T2 / SOC2, T3 / SOC3…T…) n / SOC n Each of these corresponds to a unique battery charging performance parameter (F1, F2, F3, ... F). n ).

[0110] Step S032: Compare the candidate charging performance parameters with the power supply performance parameters, select the target charging performance parameter which is less than the power supply performance parameter, and obtain the target charging progress interval corresponding to the target charging performance parameter from the battery charging table.

[0111] Step S033: Before the battery enters the charging state and the current charging progress value reaches the target charging progress range, or when the current charging progress value reaches the target charging progress range, adjust the current temperature of the battery according to the preset first thermal control method.

[0112] It is understood that in this embodiment, the maximum allowable charging power of the battery is used as the charging performance parameter of the battery, and the maximum allowable power supply of the charging pile is used as the power supply performance parameter of the charging pile.

[0113] Taking the battery demand mode in heating mode as an example, the maximum allowable charging power (F1, F2, F3, ... F) in the charging data table will be used to calculate the maximum allowable charging power. nBy connecting the two, we can obtain a battery's allowable charging performance curve, while the charging pile's power supply performance curve is a straight line (because the maximum allowable power supply of the charging pile is a constant value under a specified charging type).

[0114] The charging data table contains various temperature nodes T1, T2, T3...T n Connecting them together, we can obtain a temperature curve of the battery (T1, T2, T3…T…). n );

[0115] Specifically, in this embodiment of the application, before the battery is connected to the charging pile and before it officially begins charging, the Battery Management System (BMS) performs a simulation to determine the battery's temperature curve under conditions of no thermal management throughout the charging process. This simulation, combined with the State of Charge (SOC), yields the current battery state (T1 / SOC1, T2 / SOC2, T3 / SOC3…T…). n / SOC n This allows us to obtain the battery's permissible charging performance curve (F1, F2, F3, ... F). n The system compares the allowable charging performance curve with the charging pile power supply performance curve. If the battery's allowable charging performance curve is lower than the charging pile power supply performance curve in a certain SOC range, the system identifies this target SOC range (i.e., the target charging progress range). It then sets the thermal management heating to be activated before the battery's current SOC reaches (or just enters) the target SOC range after entering the charging state. (In the heating mode scenario, the preset first thermal control method is to activate heating; in the cooling mode scenario, the preset first thermal control method is to activate cooling.) For example, if the battery's current SOC is 10% before it is connected to the charging pile and before it officially starts charging, then it is predicted that heating will be needed when the battery's SOC reaches 50%. Therefore, the system is set to activate thermal management heating control when the battery's SOC reaches 45% after it officially starts charging.

[0116] The beneficial effects of this embodiment are: it can simulate the battery's operating state under conditions of no thermal management after the battery is connected to the charging pile and before the battery is officially charged: it can find the battery charging table to obtain the (candidate) charging performance parameters under the combined conditions of battery temperature range and SOC range (battery state), and compare each candidate charging performance parameter with the power supply performance parameters of the charging pile. If the candidate charging performance parameter is lower than the power supply performance parameter in a certain SOC range, it can predict the timing of thermal management and start thermal management control in advance, reducing the limitation that the battery performance cannot be fully utilized during the charging process.

[0117] Example 3

[0118] Further, refer to Figure 2The battery's charging performance parameters are obtained by using a step-by-step lookup method on the battery charging meter (looking down from lower temperature / lower SOC). Battery charging performance is related to the battery's own temperature and remaining SOC. Charging performance parameters can be obtained by looking up the temperature / SOC combination on the battery charging meter. Figure 2 As shown:

[0119] SOC = 5%, Battery temperature = -20℃, Charging performance parameter = X1;

[0120] SOC = 6%, Battery temperature = -18℃, Charging performance parameter = X1;

[0121] SOC = 6%, Battery temperature = 1℃, Charging performance parameters = X5;

[0122] SOC = 11%, Battery temperature = -2℃, Charging performance parameters = X2;

[0123] The current charging performance parameter is X1. If the charging speed is fast and the temperature change is slow, the battery's charging performance parameter in the next stage will be X2; if the charging speed is slow and the temperature change is fast, the battery's charging performance parameter in the next stage will be X5. Therefore, for reference... Figure 6 In this embodiment, the method compares the time length to determine the specific charging performance parameters to be compared in the next stage. The specific charging performance parameters to be compared in the next stage are compared with the power supply performance parameters of the charging pile. Based on the comparison results, the battery temperature is adjusted in advance to enter the next stage.

[0124] Specifically, refer to Figure 6 In this embodiment of the application, step 30 further includes steps A1-AB4:

[0125] Step A1: With the battery charging, find the next stage's second battery temperature range adjacent to the current battery temperature range from the battery charging table.

[0126] Step A2: Calculate the first time required for the battery to reach the second battery temperature range from the current temperature, and find the first charging performance parameter of the battery when the temperature reaches the second battery temperature range from the battery charging table;

[0127] In a specific implementation, for example, if the starting temperature node of the second battery temperature range adjacent to the current battery temperature range is -5°, then the time required for the battery to reach -5° from the current temperature is calculated, the SOC state of the battery when it reaches -5° is determined, and then the corresponding first charging performance parameter is looked up from the battery charging table.

[0128] Step B1: Find the second charging progress interval of the next stage that is adjacent to the current charging progress interval in the battery charging progress table.

[0129] Step B2: Calculate the second time required for the battery to reach the second charging progress interval from the current charging progress value, and find the second charging performance parameter of the battery when the charging progress reaches the second charging progress interval from the battery charging table;

[0130] In a specific implementation, for example, if the starting temperature node of the second battery temperature range adjacent to the current battery temperature range is -5°, then the time required for the battery to reach -5° from the current temperature is calculated, the SOC state of the battery when it reaches -5° is determined, and then the corresponding first charging performance parameter is looked up from the battery charging table.

[0131] Step A3: If the first duration is less than the second duration, select the first charging performance parameter as the charging performance parameter to be compared with the power supply performance parameter;

[0132] Step B3: If the second time is shorter than the first time, select the second charging performance parameter as the charging performance parameter to be compared with the power supply performance parameter.

[0133] Step AB4: If the charging performance parameter to be compared is less than the power supply performance parameter, adjust the battery temperature in the current charging stage to enter the next charging stage according to the preset first thermal control method.

[0134] Understandably, in order to more accurately predict the battery charging capacity, this application embodiment determines in advance whether the battery needs to be heated in the next stage by determining that the charging performance parameters of the battery in the next SOC range are lower than the power supply performance parameters of the charging pile. If the battery needs to be heated in the next stage, the heating is turned on in advance in the current stage of the battery, thereby further reducing the energy consumption of battery charging energy or charging pile power supply capacity.

[0135] Example 4

[0136] Please see Figure 7 , Figure 7 A schematic diagram of an embodiment of an electronic device for battery charging management control provided in this application is shown below. Figure 7 As shown, the electronic device of this embodiment includes: at least one processor 10 ( Figure 7 Only one is shown in the diagram), memory 11, and computer program 12 stored in the memory 11 and executable on the at least one processor 10, wherein the processor 10 executes the computer program 12 to implement the steps in the battery charging management control method embodiment of this application.

[0137] Figure 7 The illustrated electronic device may include, but is not limited to, processor 10 and memory 11. Those skilled in the art will understand that... Figure 7 This is merely an example of an electronic device and does not constitute a limitation on electronic devices. It may include more or fewer components than shown in the illustration, or combinations of certain components, or different components. For example, it may also include input / output devices, network access devices, etc. Figure 7 The electronic devices shown include transportation vehicles such as new energy vehicles, new energy aircraft, new energy ships, and electric vehicles, and may also include devices such as robots, smartphones, and computers.

[0138] The processor 10, memory 11, and computer program 12 can all be BMS (Battery Management System) belonging to the battery.

[0139] In some embodiments, the memory 11 may be an internal storage unit of the electronic device, such as a hard disk or memory. In other embodiments, the memory 11 may be an external storage device of the electronic device, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc. Furthermore, the memory 11 may include both internal and external storage units of the electronic device. The memory 11 is used to store the operating system, applications, bootloader, data, and other programs, such as the program code of the computer program. The memory 11 can also be used to temporarily store data that has been output or will be output.

[0140] Furthermore, in one embodiment, the present invention also provides a battery charging management control device, comprising:

[0141] The battery status acquisition unit is used to determine the current battery status when the battery is connected to a charging pile. The current battery status includes the current temperature and the current charging progress value.

[0142] A charging pile performance acquisition unit is used to acquire the power supply performance parameters of the charging pile.

[0143] A battery performance acquisition unit is used to acquire the current charging performance parameters of the battery in the current battery state.

[0144] A thermal management control unit is used to adjust the current temperature of the battery based on the current charging performance parameters and the current power supply performance parameters.

[0145] It should be noted that the battery charging management control device can be understood as a virtual device that can be installed in the electronic device of the aforementioned embodiments. The electronic device calls the battery charging management control device through its processor, thereby running the specific implementation schemes in the above battery charging management control method embodiments. The information interaction and execution process between the above devices / units are based on the same concept as the method embodiments of this application, and their specific functions and technical effects can be found in the method embodiments section.

[0146] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0147] This application also provides a storage medium, which is a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps in the above-described method embodiments.

[0148] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to an electronic device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0149] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0150] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery charging management and control method, characterized in that, The method includes: When the battery is connected to a charging station, determine the current battery status, which includes the current temperature and the current charging progress value; Obtain the power supply performance parameters of the charging pile; Obtain the current charging performance parameters of the battery in the current battery state; The current temperature of the battery is adjusted based on the current charging performance parameters and the current power supply performance parameters.

2. The method as described in claim 1, characterized in that, The step of obtaining the current charging performance parameters of the battery in the current battery state includes: Find the current charging performance parameters of the battery in the current battery state from the battery charging table; The battery charging meter includes a correspondence between battery status and charging performance parameters, wherein the battery status includes a combination of battery temperature range and battery charging progress range.

3. The method as described in claim 1 or 2, characterized in that, The step of adjusting the current temperature of the battery based on the current charging performance parameters and the power supply performance parameters includes: When the battery is in a charging state, the current charging performance parameters and the power supply performance parameters are compared to obtain a performance comparison result; The current temperature of the battery is adjusted based on the performance comparison results.

4. The method according to any one of claims 1-3, characterized in that, The method further includes: Obtain a first power supply adjustment factor, and adjust the power supply performance parameters based on the first power supply adjustment factor to obtain a first power supply reference parameter; Adjusting the current temperature of the battery based on the performance comparison results includes: If the current charging performance parameter is less than the first power supply reference parameter, the current temperature of the battery is adjusted according to a preset first thermal control method.

5. The method as described in claim 4, characterized in that, The method further includes: Obtain a second power supply adjustment factor, and adjust the power supply performance parameters based on the second power supply adjustment factor to obtain a second power supply reference parameter; Adjusting the current temperature of the battery based on the performance comparison results further includes: If the current charging performance parameters are not less than the second power supply reference parameters, the current temperature of the battery is adjusted according to the preset second thermal control method.

6. The method according to any one of claims 2-5, characterized in that, The method further includes: When the battery is connected to the charging pile but is not in a charging state, the candidate charging performance parameters of the battery in each battery state are traversed from the battery charging table based on the correspondence. The candidate charging performance parameters that have been traversed are compared with the power supply performance parameters, a target charging performance parameter that is smaller than the power supply performance parameter is selected, and the target charging progress interval corresponding to the target charging performance parameter is obtained from the battery charging table. Before the battery enters the charging state and before the current charging progress value reaches the target charging progress range, or before the current charging progress value reaches the target charging progress range, the current temperature of the battery is adjusted according to a preset first thermal control method.

7. The method according to any one of claims 2-6, characterized in that, The method further includes: When the battery is charging, find the second battery temperature range of the next stage that is adjacent to the battery temperature range where the current temperature is located from the battery charging table. Calculate the first time required for the battery to reach the second battery temperature range from the current temperature, and look up the first charging performance parameter of the battery when the temperature reaches the second battery temperature range from the battery charging table; Find the second charging progress interval of the next stage that is adjacent to the battery charging progress interval where the current charging progress value is located from the battery charging progress table; Calculate the second time required for the battery to reach the second charging progress interval from the current charging progress value, and look up the second charging performance parameter when the battery's charging progress reaches the second charging progress interval from the battery charging table; Compare the first duration and the second duration to obtain the duration comparison result; Based on the duration comparison results, the charging performance parameters to be compared are determined from the first charging performance parameter and the second charging performance parameter; If the charging performance parameter to be compared is less than the power supply performance parameter, the battery temperature is adjusted to enter the next charging stage according to the preset first thermal control method during the current charging stage.

8. The method as described in claim 7, characterized in that, The step of determining the charging performance parameter to be compared from the first charging performance parameter and the second charging performance parameter based on the duration comparison result includes: If the first duration is less than the second duration, the first charging performance parameter is selected as the charging performance parameter to be compared with the power supply performance parameter. If the second time is less than the first time, the second charging performance parameter is selected as the charging performance parameter to be compared with the power supply performance parameter.

9. The method according to any one of claims 1 to 8, characterized in that, The process of obtaining the power supply performance parameters of the charging pile includes: The power demand or current demand is sent to the charging pile, so that the charging pile can provide feedback on the power supply performance parameters based on the power demand or current demand.

10. A battery charging management and control device, characterized in that, include: The battery status acquisition unit is used to determine the current battery status of the battery when the battery is connected to the charging pile. The current battery status includes the current temperature and the current charging progress value. A charging pile performance acquisition unit is used to acquire the power supply performance parameters of the charging pile. A battery performance acquisition unit is used to acquire the current charging performance parameters of the battery in the current battery state; A thermal management control unit is used to adjust the current temperature of the battery based on the current charging performance parameters and the current power supply performance parameters.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 9.

12. A storage medium, said storage medium being a computer-readable storage medium, said computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 9.

Images