Charging control method, device, electronic device and storage medium

Abstract

The present application discloses a charging control method, device, electronic device and storage medium. The method includes: obtaining the difference between the current cumulative charging capacity of the battery and the cumulative charging amount when the battery reaches the first state of charge; obtaining the ratio of the difference to the rated capacity of the battery; obtaining the product of the ratio and the average value of the health state of the battery, and determining the product as the floating value of the state of charge; determining the sum of the floating value of the state of charge and the first state of charge as the second state of charge; determining the first state of charge interval and the charging rate interval corresponding to the current voltage according to the voltage interval in which the current voltage is located; obtaining the target charging rate corresponding to the battery according to the second state of charge, the first state of charge interval and the charging rate interval. In the embodiment of the present application, the charging efficiency and charging performance of the battery can be improved, and the accuracy of the battery charging control can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a charging control method, device, electronic device and storage medium. Background Art

[0002] Lithium batteries have the advantages of high power density, high energy density, long cycle life, high output voltage, and green environmental protection. They are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields. How to improve the charging speed of lithium batteries while ensuring charging performance has become a hot topic of current research.

[0003] In the related art, in order to improve the battery charging efficiency, the voltage value reached by the battery during the charging process is usually divided into different intervals, each voltage interval corresponds to a fixed charging rate, and the target charging rate is determined according to the voltage interval where the current voltage of the battery to be charged is located, and the battery to be charged is charged according to the target charging rate. However, this method cannot accurately adjust the battery charging rate according to the real-time voltage or state of charge (SOC) of the battery, which will result in low battery charging efficiency and poor charging performance.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0005] In view of the above problems, the present application provides a charging control method, device, electronic device and storage medium, which can solve the technical problems of low battery charging efficiency and charging performance in related technologies.

[0006] In a first aspect, the present application provides a charging control method, comprising: determining a second state of charge corresponding to the battery based on a first state of charge corresponding to a current voltage of a battery to be charged, the second state of charge being a first parameter for obtaining a charging rate corresponding to the battery; determining a first state of charge interval and a charging rate interval corresponding to the current voltage according to a voltage interval in which the current voltage is located; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate; and obtaining a target charging rate corresponding to the battery according to the second state of charge, the first state of charge interval and the charging rate interval.

[0007] In the technical solution of the embodiment of the present invention, based on the first state of charge corresponding to the current voltage of the battery to be charged, the second state of charge corresponding to the battery is determined, and the second state of charge is a first parameter for obtaining the charging rate corresponding to the battery; according to the voltage range in which the current voltage is located, the first state of charge range and the charging rate range corresponding to the current voltage are determined; the first state of charge range is a second parameter for obtaining the charging rate, and the charging rate range is a third parameter for obtaining the charging rate; according to the first state of charge, the first state of charge range and the charging rate range, the target charging rate corresponding to the battery can be accurately obtained. Compared with the method of determining the target charging rate according to the voltage range in which the current voltage of the battery to be charged is located in the related art, the present application can not only accurately determine the real-time state of charge (second state of charge) of the battery, but also obtain the target charging rate corresponding to the battery according to the real-time state of charge, while improving the battery charging efficiency and charging performance, but also improving the accuracy of battery charging control, with small limitations and high universality.

[0008] In some embodiments, the determining of a second state of charge corresponding to the battery based on a first state of charge corresponding to a current voltage of the battery to be charged includes: obtaining the difference between the current cumulative charging capacity of the battery and the cumulative charging amount of the battery when the battery reaches the first state of charge; obtaining the ratio of the difference to the rated capacity of the battery; obtaining the product of the ratio and an average value of the health status of the battery, and determining the product as a state of charge floating value; and determining the sum of the state of charge floating value and the first state of charge as the second state of charge.

[0009] In an embodiment of the present application, the real-time state of charge of the battery can be accurately obtained based on the first state of charge, the current cumulative charging capacity of the battery, the cumulative charge amount of the battery when it reaches the first state of charge, and the average value of the battery's health status. The charging rate suitable for the current state of charge of the battery can be obtained based on the real-time state of charge, which can significantly improve the efficiency of battery charging.

[0010] In some embodiments, determining a first state of charge interval corresponding to the current voltage based on the voltage interval in which the current voltage of the battery to be charged is located includes: determining a second state of charge interval corresponding to the voltage interval in which the current voltage is located based on a mapping relationship between voltage intervals and state of charge intervals; and obtaining the first state of charge interval based on the second state of charge interval and the first state of charge.

[0011] In an embodiment of the present application, through the mapping relationship between the voltage interval and the state of charge interval, the second state of charge interval corresponding to the voltage interval in which the battery is currently located is obtained, and then the first state of charge interval is obtained based on the second state of charge interval and the first state of charge. According to the first state of charge interval, the target charging rate for charging the battery can be accurately obtained, and the charging rate suitable for the current corresponding battery can be obtained according to the first state of charge interval, which can significantly improve the efficiency of battery charging.

[0012] In some embodiments, obtaining the first state of charge interval based on the second state of charge interval and the first state of charge includes: obtaining the interval difference of the second state of charge interval; taking the first state of charge as the first endpoint of the interval, and the sum of the first state of charge and the interval difference as the second endpoint of the interval, to obtain the first state of charge interval.

[0013] The embodiment of the present application can accurately obtain the target charging rate for charging the battery based on the interval difference between the first state of charge and the second state of charge interval, and obtain the charging rate suitable for the current battery based on the first state of charge interval, which can significantly improve the efficiency of battery charging.

[0014] In some embodiments, the charging rate range corresponding to the current voltage is determined based on the voltage range in which the current voltage is located, including: obtaining the previous voltage range of the voltage range, taking the charging rate corresponding to the voltage range as the first endpoint of the charging rate range, taking the charging rate corresponding to the previous voltage range as the second endpoint of the charging rate range, and obtaining the charging rate range corresponding to the battery.

[0015] The embodiment of the present application can obtain the charging rate range corresponding to the battery in the current state according to the charging rate corresponding to the current voltage range and the previous voltage range. The charging rate suitable for the current battery can be accurately obtained according to the charging rate range corresponding to the two adjacent voltage ranges, which can significantly improve the efficiency of battery charging.

[0016] In some embodiments, obtaining the target charging rate corresponding to the battery based on the second state of charge, the first state of charge interval and the charging rate interval includes: interpolating the second state of charge according to a preset linear function relationship, the first state of charge interval and the charging rate interval to obtain the charging rate corresponding to the second state of charge, and determining the charging rate corresponding to the second state of charge as the target charging rate.

[0017] The embodiment of the present application interpolates the second state of charge according to a preset linear function relationship, the first state of charge range and the charging rate range, and can obtain a more suitable charging rate than the fixed charging rate obtained based on the voltage range. Therefore, it can not only significantly improve the efficiency of battery charging, but also improve the accuracy of battery charging control.

[0018] In some embodiments, the charging control method also includes: detecting that the battery starts charging, obtaining the initial maximum state of charge and the current voltage of the battery; based on the voltage corresponding to the initial maximum state of charge and the current voltage, respectively obtaining a first charging rate corresponding to the initial maximum state of charge and a second charging rate corresponding to the current voltage; and controlling the charging of the battery based on the minimum value of the first charging rate and the second charging rate.

[0019] In the embodiment of the present application, when the battery just starts charging, the first charging rate corresponding to the initial maximum state of charge and the second charging rate corresponding to the current voltage are respectively obtained based on the charging control method in the above embodiment, and the battery charging is controlled based on the minimum value of the first charging rate and the second charging rate. Not only can the charging rate suitable for the current corresponding battery be obtained, the efficiency of battery charging is improved, but also the safety of charging control when the battery just starts charging can be improved.

[0020] In some embodiments, it is detected that the battery enters a charging stage, and the maximum temperature and the minimum temperature of the battery are obtained; based on a first voltage corresponding to the maximum temperature and a second voltage corresponding to the minimum temperature, a third charging rate corresponding to the first voltage and a fourth charging rate corresponding to the second voltage are respectively obtained; based on the minimum value of the third charging rate and the fourth charging rate, the charging of the battery is controlled.

[0021] In the embodiment of the present application, during the charging process of the battery, the third charging rate corresponding to the maximum temperature of the battery and the fourth charging rate corresponding to the minimum temperature of the battery are respectively obtained based on the charging control method in the above embodiment, and the charging of the battery is controlled based on the minimum value of the third charging rate and the fourth charging rate. Not only can the charging rate suitable for the current corresponding battery be obtained, the efficiency of battery charging is improved, but also the safety of charging control during the battery charging process can be improved.

[0022] In a second aspect, an embodiment of the present invention provides a charging control device, comprising: a first determination unit, for determining a second state of charge corresponding to the battery to be charged based on a first state of charge corresponding to a current voltage of the battery, the second state of charge being a first parameter for obtaining a charging rate corresponding to the battery; a second determination unit, for determining a first state of charge interval and a charging rate interval corresponding to the current voltage according to a voltage interval in which the current voltage is located; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate; a first acquisition unit, for obtaining a target charging rate corresponding to the battery according to the first state of charge interval, the second state of charge and the charging rate interval.

[0023] In a third aspect, an embodiment of the present application further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the charging control method as described in the first aspect is implemented.

[0024] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the charging control method as described in the first aspect is implemented.

[0025] In a fifth aspect, an embodiment of the present application further provides a computer program product, including a computer program, characterized in that the computer program is executed by a processor to implement the charging control method as described in the first aspect.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of a vehicle provided according to an embodiment of the present application;

[0029] Figure 2 A flow chart of a charging control method provided in an embodiment of the present application;

[0030] Figure 3 A flowchart of another charging control method provided in an embodiment of the present application;

[0031] Figure 4 A flowchart of another charging control method provided in an embodiment of the present application;

[0032] Figure 5 A flowchart of another charging control method provided in an embodiment of the present application;

[0033] Figure 6 is a flow chart of another charging control method provided in an embodiment of the present application;

[0034] Figure 7 is a flow chart of another charging control method provided in an embodiment of the present application;

[0035] Figure 8 is a structural schematic diagram of a charging control device provided in an embodiment of the present application;

[0036] Fig. 9 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of the present invention, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In the description of the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0043] At present, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. In the fields of electric transportation supply, military equipment, aerospace and so on, batteries are usually used to provide power.

[0044] Among various types of power batteries, lithium batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields due to their advantages such as high power density, high energy density, long cycle life, high output voltage, and green environmental protection. How to improve the charging speed of lithium batteries while ensuring charging performance has become a hot topic of current research.

[0045] In the related art, in order to improve the battery charging efficiency, the voltage value reached by the battery during the charging process is usually divided into different intervals. Each voltage interval corresponds to a fixed charging rate. The target charging rate is determined according to the voltage interval in which the current voltage of the battery to be charged is located, and the battery to be charged is charged according to the target charging rate.

[0046] Through in-depth analysis of the above-mentioned related technologies, it is found that during the charging process of the battery, in the same voltage range, as the voltage changes, the corresponding state of charge of the battery is also constantly changing. The above method cannot accurately adjust the battery charging rate according to the real-time voltage or state of charge of the battery, which will result in low battery charging efficiency, poor charging performance, and low accuracy of battery charging control.

[0047] Based on the above problems existing in the related art, some embodiments of the present application propose a charging control method, device, electronic device and storage medium. Based on the first state of charge corresponding to the current voltage of the battery to be charged, determine the second state of charge corresponding to the battery, the second state of charge is a first parameter for obtaining the charging rate corresponding to the battery; according to the voltage interval in which the current voltage is located, determine the first state of charge interval and charging rate interval corresponding to the current voltage; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate; according to the second state of charge, the first state of charge interval and the charging rate interval, obtain the target charging rate corresponding to the battery.

[0048] Compared with the method in the related art of determining the target charging rate according to the voltage range of the current voltage of the battery to be charged, the present application can not only accurately determine the real-time state of charge of the battery (the second state of charge), but also obtain the target charging rate corresponding to the battery according to the real-time state of charge. While improving the battery charging efficiency and charging performance, it also improves the accuracy of battery charging control, has few limitations and high universality.

[0049] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0050] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0051] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0052] In some embodiments of the present application, the battery 100 is equipped with a corresponding battery management system (BMS) (not shown). The BMS is an electronic system for detecting and managing the battery 100, and has multiple management functions, such as being able to perform real-time detection of state parameters such as voltage, current, and temperature of the battery 100, being able to control the charging and discharging process of the battery 100, being able to detect abnormal battery conditions such as abnormal voltage, abnormal temperature, and abnormal current, etc. The BMS is a key component for ensuring safe, reliable, and efficient operation of the battery.

[0053] In one or more embodiments, during the battery charging process, the BMS determines a second state of charge corresponding to the battery based on a first state of charge corresponding to the current voltage of the battery to be charged, where the second state of charge is a first parameter for obtaining a charging rate corresponding to the battery; according to the voltage range in which the current voltage is located, a first state of charge interval and a charging rate interval corresponding to the current voltage are determined; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate; according to the second state of charge, the first state of charge interval and the charging rate interval, a target charging rate corresponding to the battery is obtained, and then the battery is controlled to charge according to the target charging rate.

[0054] The specific process of the charging control method of the present application is described in detail below through specific embodiments. Figure 2 The charging control method shown in the figure specifically comprises the following steps:

[0055] S201, determining a second state of charge corresponding to the battery to be charged based on a first state of charge corresponding to a current voltage of the battery, where the second state of charge is a first parameter for obtaining a charging rate corresponding to the battery;

[0056] S202, determining a first state of charge interval and a charging rate interval corresponding to the current voltage according to the voltage interval in which the current voltage is located; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate;

[0057] S203: Acquire a target charging rate corresponding to the battery according to the second state of charge, the first state of charge range, and the charging rate range.

[0058] Specifically, in the embodiment of the present invention, the execution subject of the embodiment of the present application may be a battery management system BMS in the battery, and the battery to be charged includes but is not limited to a ternary lithium battery. The following embodiment takes a ternary lithium battery as an example to illustrate the scheme of the present application, and does not have any limiting effect on the present application.

[0059] It should be noted that, during the charging process, the state of charge of the battery will change with the change of voltage, and each voltage value corresponds to a state of charge. For lithium batteries, the voltage of the battery charging process is usually divided into different voltage stages (voltage intervals), and each voltage interval corresponds to a state of charge interval. In an example, for example, the current voltage of the battery is 3.65V, and the voltage interval of 3.65V is [3.6V, 3.7V]. There is a linear relationship between the voltage interval and the state of charge interval, and the linear relationship can be, for example: the state of charge interval corresponding to the voltage interval [3.6V, 3.7V] is [10%, 15%], and the state of charge interval corresponding to [3.7V, 3.72V] is [15%, 20%]. Therefore, according to the voltage interval [3.6V, 3.7V] where the current voltage of the battery is 3.65V, the first state of charge interval corresponding to the current voltage can be obtained as [10%, 15%].

[0060] The first state of charge mentioned above can be the state of charge of the battery obtained before obtaining the target charging rate, and the state of charge can be the state of charge calculated by the ampere-hour integration method or the open circuit voltage method; since the state of charge of the battery continues to increase during the charging process, that is, after obtaining the first state of charge, when calculating the target charging rate, the battery will increase based on the first state of charge and reach the second state of charge, that is, the second state of charge is the actual SOC of the battery when the target charging rate is obtained. The first state of charge and the second state of charge can also be the SOC corresponding to the single cell with the most power in the battery at different charging times, that is, the maximum SOC of the battery.

[0061] In one example, since the state of charge of the battery continues to increase during the charging process, after the BMS obtains the first state of charge, it locks the state of charge as the reference state of charge for obtaining the target charging rate. Based on each voltage interval corresponding to a state of charge interval, according to a state of charge interval corresponding to the current voltage and the first state of charge currently locked by the battery, the first state of charge interval of the charging rate of the battery can be obtained. Since each voltage interval corresponds to a charging rate interval, in the process of obtaining the target charging rate, the present application can determine the interval in which the target charging rate is located, that is, the charging rate interval corresponding to the battery, according to the previous voltage interval and the voltage interval in which the battery is currently located. Finally, according to the relationship between the first state of charge interval and the charging rate interval corresponding to the battery, the target charging rate corresponding to the actual SOC of the current battery can be accurately obtained.

[0062] In the technical solution of the embodiment of the present invention, based on the first state of charge corresponding to the current voltage of the battery to be charged, the second state of charge corresponding to the battery is determined, and the second state of charge is a first parameter for obtaining the charging rate corresponding to the battery; according to the voltage range in which the current voltage is located, the first state of charge range and the charging rate range corresponding to the current voltage are determined; the first state of charge range is a second parameter for obtaining the charging rate, and the charging rate range is a third parameter for obtaining the charging rate; according to the first state of charge, the first state of charge range and the charging rate range, the target charging rate corresponding to the battery can be accurately obtained. Compared with the method of determining the target charging rate according to the voltage range in which the current voltage of the battery to be charged is located in the related art, the present application can not only accurately determine the real-time state of charge (second state of charge) of the battery, but also obtain the target charging rate corresponding to the battery according to the real-time state of charge, while improving the battery charging efficiency and charging performance, but also improving the accuracy of battery charging control, with small limitations and high universality.

[0063] In one or more embodiments of the present application, Figure 3 As shown, the above charging control method includes the following steps:

[0064] S301, obtaining a difference between a current cumulative charging capacity of the battery and a cumulative charging capacity when the battery reaches the first state of charge;

[0065] S302, obtaining a ratio of the difference to a rated capacity of the battery;

[0066] S303, obtaining a product of the ratio and an average value of the health state of the battery, and determining the product as a state of charge floating value;

[0067] S304: Determine a sum of the state of charge floating value and the first state of charge as the second state of charge.

[0068] Specifically, in the embodiment of the present application, since the state of charge of the battery continues to increase during the charging process, that is, after obtaining the above-mentioned first state of charge, when calculating the target charging rate, the battery will increase based on the first state of charge to reach the second state of charge, and the charging rate suitable for the battery at the moment can be obtained based on the second state of charge. Therefore, based on the first state of charge, the above-mentioned second state of charge can be obtained by obtaining the floating value of the state of charge.

[0069] In one or more embodiments, the floating value of the state of charge is the real-time changing SOC, and the real-time changing SOC=(current cumulative charging capacity-cumulative charging capacity when reaching the second state of charge) / total battery capacity*average SOH, wherein the current cumulative charging capacity is the cumulative charging capacity corresponding to the second state of charge, the total capacity of the battery is the rated capacity of the battery, and the average SOH is the average health state (State of Health, SOH) of the battery. Specifically, the rated capacity of the battery can be obtained by calculating the number of cycles of the battery, or by calculating the battery's SOH, or by obtaining it based on the rated capacity of the battery at the beginning of its life (Begin of Life, BOL).

[0070] In one example, assuming that the first state of charge is 52%, the current cumulative charging capacity is 98.384Ah, the cumulative charging capacity when reaching the second state of charge is 95Ah, the total battery capacity is 141Ah, and the average SOH is 0.8, according to the above calculation formula, the state of charge floating value is 3%, and the second state of charge is 55%.

[0071] S305, determining a first state of charge interval and a charging rate interval corresponding to the current voltage according to the voltage interval in which the current voltage is located; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate;

[0072] S306: Acquire a target charging rate corresponding to the battery according to the second state of charge, the first state of charge range, and the charging rate range.

[0073] The above steps S305 and S306 have been explained in the previous text and will not be repeated here.

[0074] In an embodiment of the present application, the real-time state of charge of the battery can be accurately obtained based on the first state of charge, the current cumulative charging capacity of the battery, the cumulative charge amount of the battery when it reaches the first state of charge, and the average value of the battery's health status. The charging rate suitable for the current state of charge of the battery can be obtained based on the real-time state of charge, which can significantly improve the efficiency of battery charging.

[0075] In one or more embodiments of the present application, Figure 4 As shown, the above charging control method includes the following steps:

[0076] S401, based on a first state of charge corresponding to a current voltage of a battery to be charged, determining a second state of charge corresponding to the battery, where the second state of charge is a first parameter for obtaining a charging rate corresponding to the battery.

[0077] S402, determining a second state of charge interval corresponding to the voltage interval in which the current voltage is located according to a mapping relationship between voltage intervals and state of charge intervals;

[0078] S403: Acquire the first state of charge interval based on the second state of charge interval and the first state of charge.

[0079] Specifically, in the embodiment of the present application, the charging process of the battery is usually divided into different voltage stages (voltage intervals), and each voltage interval has a corresponding mapping relationship with the state of charge interval. Therefore, the voltage interval in which the current voltage of the battery is located is first determined, and then the first state of charge interval of the target charging rate is obtained according to the state of charge interval corresponding to the voltage interval and the currently locked first state of charge.

[0080] S404, determining a charging rate range corresponding to the current voltage according to the voltage range in which the current voltage is located; the charging rate range is a third parameter for obtaining the charging rate;

[0081] S405: Acquire a target charging rate corresponding to the battery according to the second state of charge, the first state of charge range, and the charging rate range.

[0082] In an embodiment of the present application, through the mapping relationship between the voltage interval and the state of charge interval, the second state of charge interval corresponding to the voltage interval in which the battery is currently located is obtained, and then the first state of charge interval is obtained based on the second state of charge interval and the first state of charge. According to the first state of charge interval, the target charging rate for charging the battery can be accurately obtained, and the charging rate suitable for the current corresponding battery can be obtained according to the first state of charge interval, which can significantly improve the efficiency of battery charging.

[0083] The above steps S401, S402, S404 and S405 have been explained in the previous text and will not be repeated here.

[0084] In one or more embodiments of the present application, obtaining the first state of charge interval based on the second state of charge interval and the second state of charge includes: obtaining the interval difference of the second state of charge interval; taking the first state of charge as the first endpoint of the interval, and the sum of the first state of charge and the interval difference as the second endpoint of the interval, to obtain the first state of charge interval.

[0085] Specifically, in this embodiment of the present application, assuming that the first state of charge is 52%, for example, and the second state of charge interval corresponding to the voltage interval corresponding to the current voltage is [55%, 60%], the first state of charge 52% is taken as the left endpoint (first endpoint) of the interval, and the sum of the first state of charge 52% and the difference of 5% between the interval and 5% is taken as the right endpoint (second endpoint) of the interval, and the first state of charge interval is [52%, 57%].

[0086] The embodiment of the present application can accurately obtain the target charging rate for charging the battery based on the interval difference between the first state of charge and the second state of charge interval, and obtain the charging rate suitable for the current battery based on the first state of charge interval, which can significantly improve the efficiency of battery charging.

[0087] In one or more embodiments of the present application, Figure 5 As shown, the above charging control method includes the following steps:

[0088] S501, determining a second state of charge for obtaining a charging rate of a battery to be charged based on a first state of charge currently corresponding to the battery.

[0089] S502: Determine a first state of charge interval for acquiring a charging rate of the battery according to a voltage interval in which the current voltage is located.

[0090] S503, obtaining a previous voltage interval of the voltage interval, taking the charging rate corresponding to the voltage interval as the first endpoint of the charging rate interval, taking the charging rate corresponding to the previous voltage interval as the second endpoint of the charging rate interval, and obtaining the charging rate interval corresponding to the battery.

[0091] Specifically, in the embodiments of the present application, it should be noted that the charging rate of the battery refers to the current value of the battery charging, which is numerically equal to a multiple of the rated capacity. It is usually represented by C. For example, the rated capacity of the battery to be charged is 141Ah, and 1C=141A. The rate C2 corresponding to the voltage interval in which the current voltage is located is used as the right endpoint (first endpoint) of the charging rate interval, and the rate C1 corresponding to the previous voltage interval of the current voltage interval is used as the left endpoint (second endpoint) of the charging rate interval. Assuming C1=2.83C, C2=2.61C, the current charging rate interval corresponding to the battery can be obtained [2.83C, 2.61C].

[0092] In some embodiments, since the charge and discharge curve of the battery can reflect the voltage change of the battery at different SOCs, the charge rate range of the battery at a specific SOC can be determined based on the charge and discharge curve and the voltage range of the current voltage. In other embodiments, the charge rate range of the battery can also be estimated using an equivalent circuit model and the voltage range of the current voltage.

[0093] S504: Acquire a target charging rate corresponding to the battery according to the second state of charge, the first state of charge range, and the charging rate range.

[0094] The above steps S501, S502 and S504 have been explained in the previous text and will not be repeated here.

[0095] The embodiment of the present application can obtain the charging rate range corresponding to the battery in the current state according to the charging rate corresponding to the current voltage range and the previous voltage range. The charging rate suitable for the current battery can be accurately obtained according to the charging rate range corresponding to the two adjacent voltage ranges, which can significantly improve the efficiency of battery charging.

[0096] In one or more embodiments of the present application, Figure 6 As shown, the above charging control method includes the following steps:

[0097] S601, based on a first state of charge currently corresponding to a battery to be charged, determining a second state of charge for obtaining a charging rate of the battery.

[0098] S602: Determine, according to the voltage interval in which the current voltage is located, a first state of charge interval for obtaining a charging rate of the battery, and a charging rate interval corresponding to the battery.

[0099] S603, interpolating the second state of charge according to a preset linear function relationship, the first state of charge interval and the charging rate interval to obtain the charging rate corresponding to the second state of charge, and determining the charging rate corresponding to the second state of charge as the target charging rate.

[0100] Specifically, in the embodiment of the present application, the above linear function relationship can be a one-dimensional linear interpolation function or other linear interpolation functions. Taking the one-dimensional linear interpolation function as an example, assuming that the first state of charge interval is [52%, 57%], the charging rate interval is [2.83C, 2.61C], and the second state of charge is 55%, according to the calculation formula of the one-dimensional linear interpolation function Calculate the target charging rate corresponding to the second state of charge, where x is equal to 55%. =52%, =2.83C, =57%, =2.61C Substituting into the above formula, we can obtain the target charging rate y=2.698C corresponding to the second state of charge of 55%.

[0101] In some embodiments, the voltage value of the battery at different SOCs can be determined through the battery voltage-SOC curve, and then by determining the voltage range in which the battery is located, the SOC range corresponding to the voltage range can be found, and then the target charging rate can be determined from the charging rate range.

[0102] The above steps S601 and S602 have been explained in the previous text and will not be repeated here.

[0103] The embodiment of the present application interpolates the second state of charge according to a preset linear function relationship, the first state of charge interval and the charging rate interval, and can obtain a more suitable charging rate than a fixed charging rate obtained based on the voltage interval, which can not only significantly improve the efficiency of battery charging, but also improve the accuracy of battery charging control.

[0104] In one or more embodiments of the present application, the charging control method further includes:

[0105] Detecting that the battery starts to be charged, and obtaining an initial maximum state of charge and a current voltage of the battery;

[0106] Based on the voltage corresponding to the initial maximum state of charge and the current voltage, respectively acquiring a first charging rate corresponding to the initial maximum state of charge and a second charging rate corresponding to the current voltage;

[0107] The battery charging is controlled based on a minimum value between the first charging rate and the second charging rate.

[0108] In an embodiment of the present application, when the battery starts to charge, the corresponding charging rates are obtained respectively according to the initial maximum state of charge of the battery when charging just starts and the current voltage of the battery, and then the smallest charging rate between the two is taken as the target charging rate to charge the battery, which can improve the safety of charging control when the battery just starts charging. It should be noted that the above-mentioned initial maximum state of charge can be the remaining power of the battery when charging starts. In the process of obtaining the first charging rate corresponding to the initial maximum state of charge, the initial maximum state of charge is used as the first state of charge in the above-mentioned charging control method. According to the first state of charge, and based on the preset mapping relationship between voltage-state of charge-temperature, the second state of charge, the first state of charge interval and the charging rate interval corresponding to the initial maximum state of charge are obtained. According to the second state of charge, the first state of charge interval and the charging rate interval, the first charging rate corresponding to the initial maximum state of charge can be obtained; similarly, based on the preset mapping relationship between voltage-state of charge-temperature, the state of charge corresponding to the current voltage is queried, the state of charge is used as the first state of charge in the above-mentioned charging control method, and then the second charging rate corresponding to the current voltage can be obtained.

[0109] In one example, the above-mentioned preset mapping relationship between voltage-state of charge-temperature can be stored in the BMS.

[0110] In the embodiment of the present application, when the battery just starts charging, the first charging rate corresponding to the initial maximum state of charge and the second charging rate corresponding to the current voltage are respectively obtained based on the charging control method in the above embodiment, and the battery charging is controlled based on the minimum value of the first charging rate and the second charging rate. Not only can the charging rate suitable for the current corresponding battery be obtained, the efficiency of battery charging is improved, but also the safety of charging control when the battery just starts charging can be improved.

[0111] In one or more embodiments of the present application, the charging control method further includes:

[0112] Detecting that the battery enters a charging stage, obtaining a maximum temperature and a minimum temperature of the battery;

[0113] Based on the first voltage corresponding to the maximum temperature and the second voltage corresponding to the minimum temperature, respectively obtaining a third charging rate corresponding to the first voltage and a fourth charging rate corresponding to the second voltage;

[0114] The battery charging is controlled based on a minimum value between the third charging rate and the fourth charging rate.

[0115] In an embodiment of the present application, when the battery enters the charging stage, the corresponding charging rates are obtained respectively according to the maximum temperature and minimum temperature of the battery during this process, and then the smallest charging rate between the two is taken as the target charging rate to charge the battery, which can improve the safety of charging control when the battery just enters the charging stage.

[0116] It should be noted that the above-mentioned maximum temperature and minimum temperature can be temperature values ​​obtained according to the real-time temperature interval corresponding to the battery detected by the temperature sensor at the current moment. In the process of obtaining the first charging rate corresponding to the minimum temperature, based on the preset mapping relationship between voltage-state of charge-temperature, the current state of charge corresponding to the battery, that is, the first state of charge, is obtained, and then based on the first state of charge and the preset mapping relationship between voltage-state of charge-temperature, the second state of charge, the first state of charge interval and the charging rate interval corresponding to the minimum temperature are obtained. According to the second state of charge, the first state of charge interval and the charging rate interval, the third charging rate corresponding to the minimum temperature can be obtained; similarly, the fourth charging rate corresponding to the maximum temperature can be obtained.

[0117] In the process of charging the battery, the embodiment of the present application obtains the first charging rate corresponding to the maximum temperature of the battery and the second charging rate corresponding to the minimum temperature of the battery based on the charging control method in the above embodiment, and controls the charging of the battery based on the minimum value of the third charging rate and the fourth charging rate. Not only can the charging rate suitable for the current corresponding battery be obtained, the efficiency of battery charging is improved, but also the safety of charging control during battery charging can be improved.

[0118] Based on the above embodiments, in one or more implementations of the present application, Figure 7 As shown, the charging control method includes:

[0119] S1. Determine whether the battery currently meets the charging conditions, the charging conditions including: the battery has been configured to enter the charging mode; the battery charging status flag has been cleared; the battery is not in a floating charge state; if the battery currently does not meet one of the above charging conditions, proceed to step S2, otherwise proceed to step S3.

[0120] S2. Configure the current value of the requested charging to 0.

[0121] S3. Within the voltage range where the current voltage is located, lock the current maximum SOC (first state of charge) as the left endpoint SOC1 of the SOC lookup interval, and the current maximum SOC + interval ΔSOC as the right endpoint SOC2 of the SOC lookup interval. For example: the current maximum SOC is 52%, the SOC interval corresponding to the current Step is [55%, 60%], the interval ΔSOC is 5%, and the SOC lookup interval is [52%, 57%].

[0122] S4. Determine the real-time maximum SOC (second state of charge): Calculate the real-time changing SOC value according to the real-time stored cumulative charging capacity, the real-time maximum SOC value = current maximum SOC (first state of charge) + real-time changing SOC value.

[0123] Among them, the real-time changing SOC = ((current cumulative charging capacity - cumulative charging capacity when locking the maximum SOC) / total capacity * average SOH), for example: the current cumulative charging capacity is 98.384Ah, the cumulative charging capacity when locking the maximum SOC is 95Ah, the total capacity is 141Ah, and the average SOH is 0.8. According to the above calculation formula, the real-time changing SOC value (charge state floating value) is 3%, and the real-time maximum SOC value is 55%.

[0124] S5. Determine the table-lookup charging rate range: take the rate C2 corresponding to the voltage range of the current voltage as the right endpoint of the table-lookup rate range, and the rate C1 corresponding to the previous voltage range as the left endpoint of the table-lookup charging rate range. Assuming C1=2.83C, C2=2.61C, the table-lookup charging rate range can be obtained as [2.83C, 2.61C].

[0125] S6. Obtain the target charging rate through linear table lookup: Determine the charging rate corresponding to the real-time maximum SOC value according to the real-time maximum SOC value, the table lookup SOC interval, and the table lookup charging rate interval. For example, the real-time maximum SOC value is 55% in the SOC interval [52%, 57%], and the charging rate interval [2.83C, 2.61C]. The charging rate is 2.698C according to the unary linear function relationship interpolation. According to the requested current value = charging rate * rated capacity, the rated capacity is the above-mentioned total capacity of 141Ah, and the calculated value of the current requested current is 304.3A.

[0126] S7. Output the real-time table lookup to obtain the charging current (304.3A) for controlling the battery to charge.

[0127] The embodiments of the present application improve the charging performance, increase the charging speed, and achieve the effect of smoothing the requested current curve within the same charging interval.

[0128] The embodiment of the present invention further provides a charging control device, which is used to execute the charging control method provided in the above embodiments. Figure 8 As shown, the device comprises:

[0129] A first determining unit 802, configured to determine a second state of charge corresponding to the battery to be charged based on a first state of charge corresponding to a current voltage of the battery, wherein the second state of charge is a first parameter for obtaining a charging rate corresponding to the battery;

[0130] A second determining unit 804 is used to determine a first state of charge interval and a charging rate interval corresponding to the current voltage according to the voltage interval in which the current voltage is located; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate;

[0131] The first acquisition unit 806 is used to acquire a target charging rate corresponding to the battery according to the second state of charge, the first state of charge range, and the charging rate range.

[0132] In the technical solution of the embodiment of the present invention, based on the first state of charge corresponding to the current voltage of the battery to be charged, the second state of charge corresponding to the battery is determined, and the second state of charge is a first parameter for obtaining the charging rate corresponding to the battery; according to the voltage range in which the current voltage is located, the first state of charge range and the charging rate range corresponding to the current voltage are determined; the first state of charge range is a second parameter for obtaining the charging rate, and the charging rate range is a third parameter for obtaining the charging rate; according to the first state of charge, the first state of charge range and the charging rate range, the target charging rate corresponding to the battery can be accurately obtained. Compared with the method of determining the target charging rate according to the voltage range in which the current voltage of the battery to be charged is located in the related art, the present application can not only accurately determine the real-time state of charge of the battery, but also obtain the target charging rate corresponding to the battery according to the real-time state of charge, while improving the battery charging efficiency and charging performance, but also improving the accuracy of battery charging control, with small limitations and high universality.

[0133] In one or more implementations of the present application, the first determining unit 802 includes:

[0134] A first acquisition module, used to acquire the difference between the current cumulative charging capacity of the battery and the cumulative charging capacity when the battery reaches the first state of charge;

[0135] A second acquisition module, used to acquire a ratio of the difference to the rated capacity of the battery;

[0136] A third acquisition module is used to obtain a product of the ratio and an average value of the health state of the battery, and determine the product as a charge state floating value;

[0137] The first determining module is used to determine the sum of the state of charge floating value and the first state of charge as the second state of charge.

[0138] In one or more implementations of the present application, the second determining unit 804 includes:

[0139] A second determination module, configured to determine, according to a mapping relationship between voltage intervals and state of charge intervals, a second state of charge interval corresponding to the voltage interval in which the current voltage is located;

[0140] The first acquisition module is configured to acquire the first state of charge interval based on the second state of charge interval and the first state of charge.

[0141] In one or more implementations of the present application, the first acquisition module includes:

[0142] A first acquisition subunit, configured to acquire an interval difference of the second state of charge interval;

[0143] The second acquisition subunit is used to use the second state of charge as the first endpoint of the interval and the sum of the second state of charge and the interval difference as the second endpoint of the interval to obtain the first state of charge interval.

[0144] In one or more implementations of the present application, the second determining unit 804 includes:

[0145] The second acquisition module is used to obtain the previous voltage interval of the voltage interval, use the charging rate corresponding to the voltage interval as the first endpoint of the charging rate interval, use the charging rate corresponding to the previous voltage interval as the second endpoint of the charging rate interval, and obtain the charging rate interval corresponding to the battery.

[0146] In one or more implementations of the present application, the first acquiring unit 806 includes:

[0147] The third acquisition module is used to interpolate the second state of charge according to a preset linear function relationship, the first state of charge interval and the charging rate interval to obtain the charging rate corresponding to the second state of charge, and determine the charging rate corresponding to the second state of charge as the target charging rate.

[0148] In one or more embodiments of the present application, the charging control device further includes:

[0149] A second acquisition unit, configured to detect that the battery starts to be charged, and acquire an initial maximum state of charge and a current voltage of the battery;

[0150] a third acquisition unit, configured to respectively acquire a first charging rate corresponding to the initial maximum state of charge and a second charging rate corresponding to the current voltage based on the voltage corresponding to the initial maximum state of charge and the current voltage;

[0151] A first control unit is configured to control charging of the battery based on a minimum value between the first charging rate and a second charging rate.

[0152] In one or more embodiments of the present application, the charging control device further includes:

[0153] A fourth acquisition unit, configured to detect that the battery enters a charging stage, and acquire a maximum temperature and a minimum temperature of the battery;

[0154] a fifth acquisition unit, configured to acquire, based on the first voltage corresponding to the maximum temperature and the second voltage corresponding to the minimum temperature, a third charging rate corresponding to the first voltage and a fourth charging rate corresponding to the second voltage;

[0155] The second control unit is used to control the charging of the battery based on the minimum value of the third charging rate and the fourth charging rate.

[0156] Fig. 9 9 is a logical structure block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 900 may be an electronic device such as a BMS, a vehicle controller, a motor controller, or a domain controller that is disposed inside an electric device.

[0157] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions, and the above instructions can be executed by a battery processor to complete the above charging control method, the method comprising: based on the first state of charge corresponding to the current voltage of the battery to be charged, determining the second state of charge corresponding to the battery, the second state of charge is a first parameter for obtaining the charging rate corresponding to the battery; according to the voltage interval in which the current voltage is located, determining the first state of charge interval and the charging rate interval corresponding to the current voltage; the first state of charge interval is to obtain the second parameter of the charging rate, and the charging rate interval is to obtain the third parameter of the charging rate; according to the second state of charge, the first state of charge interval and the charging rate interval, obtaining the target charging rate corresponding to the battery. Optionally, the above instructions can also be executed by the processor of the battery to complete other steps involved in the above exemplary embodiments. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0158] In an exemplary embodiment, an application / computer program product is also provided, including one or more instructions, which can be executed by a processor of a battery to complete the above-mentioned charging control method, the method comprising: determining a second state of charge corresponding to the battery based on a first state of charge corresponding to the current voltage of the battery to be charged, the second state of charge being a first parameter for obtaining a charging rate corresponding to the battery; determining a first state of charge interval and a charging rate interval corresponding to the current voltage according to the voltage interval in which the current voltage is located; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate; obtaining a target charging rate corresponding to the battery according to the second state of charge, the first state of charge interval, and the charging rate interval. Optionally, the above-mentioned instructions can also be executed by a processor of the battery to complete other steps involved in the above-mentioned exemplary embodiment. Fig. 9 FIG. 9 is an example diagram of an electronic device 900. A person skilled in the art can understand that Fig. 9 It is only an example of the electronic device 900 and does not constitute a limitation of the electronic device 900. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device 900 may also include input and output devices, network access devices, buses, etc.

[0159] The processor 902 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor 902 may also be any conventional processor, etc. The processor 902 is the control center of the electronic device 900, and uses various interfaces and lines to connect various parts of the entire electronic device 900.

[0160] The memory 901 can be used to store computer-readable instructions. The processor 902 implements various functions of the electronic device 900 by running or executing the computer-readable instructions or modules stored in the memory 901 and calling the data stored in the memory 901. The memory 901 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the electronic device 900, etc. In addition, the memory 901 can include a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM) or other non-volatile / volatile storage devices.

[0161] If the module integrated in the electronic device 900 is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also instruct the relevant hardware to complete the computer-readable instructions through computer-readable instructions. The computer-readable instructions can be stored in a computer-readable storage medium, and when the computer-readable instructions are executed by the processor, the steps of the above-mentioned various method embodiments can be implemented.

[0162] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0163] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

[0164] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

Claims

1. A charging control method, characterized in that: include: Determining a second state of charge corresponding to the battery based on a first state of charge corresponding to a current voltage of a battery to be charged, comprising: obtaining a difference between a current cumulative charging capacity of the battery and a cumulative charging amount when the battery reaches the first state of charge; obtaining a ratio of the difference to a rated capacity of the battery; obtaining a product of the ratio and an average value of a health state of the battery, and determining the product as a floating state of charge value; and determining a sum of the floating state of charge value and the first state of charge as the second state of charge; Wherein, the second state of charge is a first parameter for obtaining a charging rate corresponding to the battery; According to the voltage interval in which the current voltage is located, determining a first state of charge interval and a charging rate interval corresponding to the current voltage; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate; A target charging rate corresponding to the battery is acquired according to the second state of charge, the first state of charge interval, and the charging rate interval.

2. The method according to claim 1, characterized in that The determining, according to the voltage interval in which the current voltage is located, a first state of charge interval corresponding to the current voltage includes: Determine, according to a mapping relationship between voltage intervals and state of charge intervals, a second state of charge interval corresponding to the voltage interval in which the current voltage is located; Based on the second state of charge interval and the first state of charge, the first state of charge interval is acquired.

3. The method according to claim 2, characterized in that The acquiring the first state of charge interval based on the second state of charge interval and the first state of charge includes: Obtaining an interval difference of the second state of charge interval; The first state of charge is taken as a first endpoint of an interval, and a sum of the first state of charge and the interval difference is taken as a second endpoint of the interval, to obtain the first state of charge interval.

4. The method according to claim 1, characterized in that: Determining a charging rate range corresponding to the current voltage according to the voltage range in which the current voltage is located includes: The previous voltage interval of the voltage interval is obtained, the charging rate corresponding to the voltage interval is used as the first endpoint of the charging rate interval, and the charging rate corresponding to the previous voltage interval is used as the second endpoint of the charging rate interval to obtain the charging rate interval corresponding to the battery.

5. The method according to claim 1, characterized in that The acquiring, according to the second state of charge, the first state of charge interval, and the charging rate interval, a target charging rate corresponding to the battery includes: According to a preset linear function relationship, the first state of charge interval and the charging rate interval, the second state of charge is interpolated to obtain the charging rate corresponding to the second state of charge, and the charging rate corresponding to the second state of charge is determined as the target charging rate.

6. The method according to claim 1, characterized in that The method further comprises: Detecting that the battery starts to be charged, and obtaining an initial maximum state of charge and a current voltage of the battery; Based on the voltage corresponding to the initial maximum state of charge and the current voltage, respectively acquiring a first charging rate corresponding to the initial maximum state of charge and a second charging rate corresponding to the current voltage; The battery charging is controlled based on a minimum value between the first charging rate and the second charging rate.

7. The method according to claim 1 or 6, characterized in that: The method further comprises: Detecting that the battery enters a charging stage, obtaining a maximum temperature and a minimum temperature of the battery; Based on the first voltage corresponding to the maximum temperature and the second voltage corresponding to the minimum temperature, respectively obtaining a third charging rate corresponding to the first voltage and a fourth charging rate corresponding to the second voltage; The battery charging is controlled based on a minimum value between the third charging rate and the fourth charging rate.

8. A charging control device, characterized in that: include: a first determining unit, configured to determine a second state of charge corresponding to the battery based on a first state of charge corresponding to a current voltage of the battery to be charged, comprising: obtaining a difference between a current cumulative charging capacity of the battery and a cumulative charging amount when the battery reaches the first state of charge; obtaining a ratio of the difference to a rated capacity of the battery; obtaining a product of the ratio and an average value of a health state of the battery, and determining the product as a state of charge floating value; determining a sum of the state of charge floating value and the first state of charge as the second state of charge, wherein the second state of charge is a first parameter for obtaining a charging rate corresponding to the battery; A second determining unit, configured to determine a first state of charge interval and a charging rate interval corresponding to the current voltage according to the voltage interval in which the current voltage is located; the first state of charge interval is a second parameter for obtaining the charging rate, and the charging rate interval is a third parameter for obtaining the charging rate; The first acquisition unit is used to acquire a target charging rate corresponding to the battery according to the second state of charge, the first state of charge interval and the charging rate interval.

9. An electronic device, comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 7 through the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method described in any one of claims 1 to 7 when executed.

11. A computer program product, comprising a computer program, characterized in that The computer program is executed by a processor to implement the method according to any one of claims 1 to 7.

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