Remaining charging time determination method, electronic device, storage medium and program

Abstract

The invention provides a remaining charging time determination method, electronic equipment, a storage medium and a program. Relates to the technical field of power management. The method is applied to a battery management system and comprises the steps of obtaining a battery state of a rechargeable battery; determining a target charging stage of the rechargeable battery according to the battery state of the rechargeable battery; calculating the charging time consumption of the target charging stage according to a charging time consumption calculation strategy corresponding to the target charging stage; the charging time consumption calculation strategy is preset according to the charging characteristics of the target charging stage; and obtaining the residual charging time of the rechargeable battery based on the charging time consumption of the target charging stage. According to the invention, an accurate and efficient residual charging time determination effect is achieved.

Description

Technical Field

[0001] The present application relates to the field of power management technology, and in particular to a method for determining remaining charging time, an electronic device, a storage medium, and a program. Background Art

[0002] Remaining charge time determination uses technical means or methods to predict and calculate the time it will take for an electric vehicle to fully charge from its current state. By quickly and accurately determining remaining charge time, customer satisfaction and trust can be improved, while also optimizing service engineer schedules, reducing workload, and providing higher-quality service.

[0003] The current method for calculating the remaining charging time of electric vehicles mainly obtains the charging current of the battery at each stage of the charging process, as well as the charging capacity corresponding to the charging current at different stages. The charging time of the battery during the charging process is determined based on the charging current and corresponding charging capacity at each stage. However, there is a problem that the remaining charging time cannot be effectively determined.

[0004] Based on this, a remaining charging time determination scheme is proposed which can accurately and efficiently determine the remaining charging time. Summary of the Invention

[0005] The present application provides a method for determining the remaining charging time, an electronic device, a storage medium, and a program to achieve accurate and efficient remaining charging time determination.

[0006] In a first aspect, the present application provides a method for determining remaining charging time, which is applied to a battery management system, comprising:

[0007] Get the battery status of the rechargeable battery;

[0008] determining a target charging stage of the rechargeable battery according to a battery state of the rechargeable battery;

[0009] Calculating the charging time of the target charging stage according to the charging time calculation strategy corresponding to the target charging stage; the charging time calculation strategy is pre-set based on the charging characteristics of the target charging stage;

[0010] Based on the charging time consumed in the target charging stage, the remaining charging time of the rechargeable battery is obtained.

[0011] In one possible implementation, the battery status includes at least a current battery temperature, a current cell voltage, and a current battery charge. Determining a target charging stage for the rechargeable battery based on the battery status includes:

[0012] When the current battery temperature is less than or equal to a first temperature threshold, determining that the target charging stage of the rechargeable battery at least includes a heating charging stage;

[0013] When the current cell voltage is less than the preset current reduction voltage, determining that the target charging stage of the rechargeable battery includes at least a constant current charging stage and a cyclic current reduction stage;

[0014] When the current battery temperature is greater than the first temperature threshold, the current cell voltage is greater than or equal to the preset current reduction voltage, and the battery power is less than 100%, the target charging stage of the rechargeable battery is determined to be the cycle current reduction stage.

[0015] In one possible implementation, when the target charging stage includes a heating charging stage, calculating the charging time of the target charging stage according to a charging time calculation strategy corresponding to the target charging stage includes:

[0016] Obtaining a second temperature threshold and a preset temperature change;

[0017] calculating a temperature difference between a second temperature threshold and a current battery temperature;

[0018] The ratio between the temperature difference and the preset temperature change is calculated to obtain the charging time in the heating charging stage.

[0019] In a possible implementation, when the target charging stage includes a constant current charging stage, calculating the charging time of the target charging stage according to a charging time calculation strategy corresponding to the target charging stage includes:

[0020] Dividing the constant current charging phase into a plurality of sub-phases via a plurality of state-of-charge nodes based on a current state of charge in the battery state and a preset interval;

[0021] Determine the charging temperature corresponding to each sub-stage based on the current state of charge and each state of charge node and a preset correspondence between the state of charge of the rechargeable battery and the battery temperature;

[0022] Determine the charging time corresponding to each sub-stage based on each sub-stage and the charging temperature corresponding to each sub-stage;

[0023] The charging time corresponding to the multiple sub-stages is accumulated and summed to obtain the charging time consumed by the rechargeable battery in the constant current charging stage.

[0024] In a possible implementation, determining the charging time corresponding to each substage according to each substage and the charging temperature corresponding to each substage includes:

[0025] For a target sub-phase, determining a charging current for the target sub-phase based on a charging temperature corresponding to the target sub-phase, a starting state-of-charge node corresponding to the target sub-phase, and a current receiving threshold in the battery state; the target sub-phase is any one of the multiple sub-phases;

[0026] Calculating a charge difference between a starting state-of-charge node and an ending state-of-charge node corresponding to a target subphase; wherein the starting state-of-charge node and the ending state-of-charge node are the state-of-charge nodes at both ends of the target subphase;

[0027] The charging time corresponding to the target sub-stage is calculated based on the charge difference of the target sub-stage, the charging current, and the battery system capacity in the battery state.

[0028] In a possible implementation, the target charging stage is a cyclic current reduction stage, and the charging time of the target charging stage is calculated according to a charging time calculation strategy corresponding to the target charging stage, including:

[0029] The charging time in the cycle down phase is determined based on the current state of charge in the battery state and the preset charging time value.

[0030] In a second aspect, the present application provides a device for determining remaining charging time, comprising:

[0031] An acquisition module, used to obtain the battery status of the rechargeable battery;

[0032] A processing module is used to determine a target charging stage of the rechargeable battery based on the battery status of the rechargeable battery; calculate the charging time of the target charging stage based on a charging time calculation strategy corresponding to the target charging stage; the charging time calculation strategy is pre-set based on the charging characteristics of the target charging stage; and obtain the remaining charging time of the rechargeable battery based on the charging time of the target charging stage.

[0033] In a possible implementation, the battery status includes at least the current battery temperature, the current cell voltage, and the current battery charge. The processing module is further configured to:

[0034] When the current battery temperature is less than or equal to a first temperature threshold, determining that the target charging stage of the rechargeable battery at least includes a heating charging stage;

[0035] When the current cell voltage is less than the preset current reduction voltage, determining that the target charging stage of the rechargeable battery includes at least a constant current charging stage and a cyclic current reduction stage;

[0036] When the current battery temperature is greater than the first temperature threshold, the current cell voltage is greater than or equal to the preset current reduction voltage, and the battery power is less than 100%, the target charging stage of the rechargeable battery is determined to be the cycle current reduction stage.

[0037] In a possible implementation, when the target charging stage includes a heating charging stage, the processing module is specifically configured to:

[0038] Obtaining a second temperature threshold and a preset temperature change;

[0039] calculating a temperature difference between a second temperature threshold and a current battery temperature;

[0040] The ratio between the temperature difference and the preset temperature change is calculated to obtain the charging time in the heating charging stage.

[0041] In a possible implementation, when the target charging stage includes a constant current charging stage, the processing module is specifically configured to:

[0042] Dividing the constant current charging phase into a plurality of sub-phases via a plurality of state-of-charge nodes based on a current state of charge in the battery state and a preset interval;

[0043] Determine the charging temperature corresponding to each sub-stage based on the current state of charge and each state of charge node and a preset correspondence between the state of charge of the rechargeable battery and the battery temperature;

[0044] Determine the charging time corresponding to each sub-stage based on each sub-stage and the charging temperature corresponding to each sub-stage;

[0045] The charging time corresponding to the multiple sub-stages is accumulated and summed to obtain the charging time consumed by the rechargeable battery in the constant current charging stage.

[0046] In a possible implementation, the processing module is further configured to:

[0047] For a target sub-phase, determining a charging current for the target sub-phase based on a charging temperature corresponding to the target sub-phase, a starting state-of-charge node corresponding to the target sub-phase, and a current receiving threshold in the battery state; the target sub-phase is any one of the multiple sub-phases;

[0048] Calculating a charge difference between a starting state-of-charge node and an ending state-of-charge node corresponding to a target subphase; wherein the starting state-of-charge node and the ending state-of-charge node are the state-of-charge nodes at both ends of the target subphase;

[0049] The charging time corresponding to the target sub-stage is calculated based on the charge difference of the target sub-stage, the charging current, and the battery system capacity in the battery state.

[0050] In a possible implementation, the target charging stage is a cycle current reduction stage, and the processing module is specifically configured to:

[0051] The charging time in the cycle down phase is determined based on the current state of charge in the battery state and the preset charging time value.

[0052] In a third aspect, the present application provides an electronic device, comprising: a memory, a processor;

[0053] The memory stores computer-executable instructions;

[0054] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0055] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above first aspect and / or various possible implementations of the first aspect.

[0056] In a fifth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementations of the first aspect.

[0057] The remaining charging time determination method, electronic device, storage medium and program provided in the present application provide basic data support for subsequent charging stage judgment and charging time calculation by obtaining the battery status of the rechargeable battery. According to the battery status of the rechargeable battery, the target charging stage of the rechargeable battery is determined, so that targeted processing can be performed according to the characteristics of different charging stages, avoiding the problem of low accuracy in determining the remaining charging time caused by adopting a single calculation strategy. According to the charging time calculation strategy of different target charging stages, the charging time of the target charging stage is calculated, which can effectively reduce errors and improve the accuracy of determining the remaining charging time. By pre-setting the charging time calculation strategy based on the charging characteristics of the target charging stage, the charging characteristics of different charging stages can be fully considered, and a suitable and reliable charging time calculation strategy can be provided for each charging stage. By accurately calculating the charging time of the target charging stage, the remaining charging time of the rechargeable battery is obtained, which can dynamically reflect the real-time progress of the charging process and provide users with accurate remaining charging time. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0059] Figure 1 A schematic diagram of a scenario of a method for determining remaining charging time provided in an embodiment of the present application;

[0060] Figure 2 Schematic diagram of the process of determining the remaining charging time provided in the embodiment of the present application Figure 1 ;

[0061] Figure 3 Schematic diagram of the process of determining the remaining charging time provided in the embodiment of the present application Figure 2 ;

[0062] Figure 4 A schematic diagram of the structure of a device for determining the remaining charging time provided in an embodiment of the present application;

[0063] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0064] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0065] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0066] Related Art 1 discloses a method, system, vehicle, and storage medium for estimating the remaining charging time. This method divides the initial remaining charging time value into two scenarios: one that includes the charging process and one that excludes the charging process. Specifically, the battery's state of charge (SOC) range is sequentially divided into N charging intervals, each of which is divided into M current ranges based on current values. A corresponding storage location for storing historical charging time values ​​is allocated for each current range within each charging interval. The SOC range ranges from the lower limit of the battery's state of charge (SOC) to full SOC. All stored historical charging time values ​​within the current SOC range are then accumulated to obtain the remaining charging time for the current charging process. Related Art 2 discloses a method, device, and system for predicting the remaining charging time of a vehicle. Through repeated testing, the relationship between battery capacity, charging current, environmental information, and the remaining charging time is discovered. The test results from these repeated tests are fitted into an algebraic expression containing a prediction constant associated with the environmental parameter. The battery capacity and charging current are obtained through the battery management system (BMS), and environmental information is obtained through various sensors or other platforms. Using the prediction constant associated with the environmental parameter, a target prediction model is determined, and the remaining charging time is obtained using the prediction model. Related technology 3 discloses a method and device for processing the remaining charging time. The remaining charging process is divided into two parts: the remaining thermal management process and the formal charging process. According to the current battery temperature and the preset thermal management end condition, the first remaining thermal management time of the battery in the charging process is determined. In the remaining thermal management process, the second remaining thermal management time of the battery in the charging process is determined according to the number of times the battery enters thermal management during the charging process and the preset remaining thermal management time. The remaining thermal management time of the battery in the charging process is determined based on the first remaining thermal management time and the second remaining thermal management time. In the formal charging process, by obtaining the charging current of the battery at each stage in the charging process and the corresponding charging capacity under the charging current, the charging time of the battery in the charging process is determined according to the charging current at each stage and the corresponding charging capacity under the charging current. In summary, in the related technology, by obtaining the charging current of the battery at each stage in the charging process and the corresponding charging capacity under the charging current, the remaining charging time of the battery in the charging process is determined according to the charging current at each stage and the corresponding charging capacity under the charging current. However, the remaining charging time determination method of this method cannot be combined with the charging strategy of each stage, and cannot effectively guarantee the accuracy of the remaining charging time, resulting in a poor experience for customers and service engineers.

[0067] The remaining charging time determination method provided in the embodiment of the present application obtains the battery status of the rechargeable battery and determines the target charging stage based on the battery status. By deeply exploring the characteristics of each stage under the integrated charging strategy, the time consumption of each stage is accurately calculated in combination with the battery system characterization parameters, thereby obtaining a charging time calculation strategy for the charging characteristics of each stage. By using the charging time calculation strategy for the charging characteristics of each stage, the remaining charging time of different stages is calculated separately. This can be combined with the charging strategy of each stage and fully explore the characteristics of different charging links, thereby improving the accuracy of the remaining charging time determination, improving the user experience, and effectively improving the user experience and service efficiency of the charging process.

[0068] Figure 1 Schematic diagram of the remaining charging time determination method provided in the embodiment of the present application. Figure 1 As shown, the specific application scenario of this application includes a charging station 11, a battery management system 12 and a charging device 13, wherein:

[0069] The charging station 11 can provide charging services to the charging device 13 through the battery management system 12. The battery management system 12 can obtain the battery status of the rechargeable battery in the charging device 13 and control the charging station 11 to provide corresponding charging services to the charging device 13 according to the battery status.

[0070] The charging station 11, battery management system 12, and charging device 13 can be applied to a variety of charging scenarios. For example, when the application scenario is charging an electric vehicle, the charging station 11 can be a public charging station or a private charging station. The battery management system 12 can be the vehicle's battery management system (BMS). The charging device 13 can be an electric vehicle. During the charging process of an electric vehicle, the charging station obtains battery status information through the vehicle's BMS and dynamically adjusts the charging current and voltage based on parameters such as the battery's temperature, voltage, charge level, and temperature to ensure the safety and efficiency of the charging process. When the application scenario is charging an energy storage system, the charging station 11 can be the charging module of the energy storage system; the battery management system 12 can be the monitoring system of the energy storage system; and the charging device 13 can be an energy storage battery pack. During the charging process of the energy storage system, the charging module adopts a multi-stage charging strategy based on the battery status information provided by the monitoring system to optimize the charging process and improve the charging and discharging efficiency and service life of the energy storage system.

[0071] Optionally, the charging service provided to the charging device 13 includes charging services in different charging stages. Exemplarily, the charging service includes charging service in the heating charging stage, charging service in the constant current charging stage and charging service in the cyclic current reduction stage. In the heating charging stage, the charging station 11 provides heating service for the battery according to the initial temperature of the battery and the preset temperature rise rate, ensuring that the battery enters the formal charging stage at an appropriate temperature. In the constant current charging stage, the charging station 11 charges the battery with a constant current until the battery voltage reaches a preset threshold. In the cyclic current reduction stage, the charging station 11 gradually reduces the charging current according to the instructions of the battery management system 12 until the battery is fully charged.

[0072] When the charging service is a cyclic down-current charging service, first, the battery management system 12 sets an appropriate preset charging current based on the battery status of the rechargeable battery in the charging device 13. The battery management system 12 controls the charging station 11 to provide the charging service of the cyclic down-current charging service to the charging device 13, including:

[0073] Round 1: The battery management system 12 controls the charging station 11 to provide the charging device 13 with a current equal to 0.1 times the preset charging current and a charging time equal to the preset time. Afterwards, the battery management system 12 controls the charging station 11 to provide the charging device 13 with a current equal to the reduced current until the voltage of the charging device 13 exceeds the voltage threshold. The reduced current in round 1 is equal to 0.6 1 Multiply the value by the preset charging current.

[0074] Round 2: The battery management system 12 controls the charging station 11 again to provide the charging device 13 with a current equal to 0.1 times the preset charging current and a charging time equal to the preset time. Afterwards, the battery management system 12 controls the charging station 11 to provide the charging device 13 with a current equal to the reduced current until the voltage of the charging device 13 exceeds the voltage threshold. The reduced current in the second round is equal to 0.6 2 Multiply the value by the preset charging current.

[0075] This process is repeated until the nth round of reduced current is lower than 0.1 times the preset charging current, at which point the battery is deemed fully charged. n Multiply the value by the preset charging current.

[0076] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0077] Figure 2Schematic diagram of the process of determining the remaining charging time provided in the embodiment of the present application Figure 1 .like Figure 2 As shown, the remaining charging time determination method is applied to a battery management system, and the method includes:

[0078] S201: Obtain the battery status of the rechargeable battery.

[0079] When determining the remaining charging time, it is necessary to obtain the current battery status of the rechargeable battery. The battery status typically includes battery indicators at a specific moment that reflect the current operating condition and remaining life of the rechargeable battery. Optionally, battery indicators include voltage, current, temperature, battery capacity (State of Charge, SOC), and health status.

[0080] Exemplarily, the battery status of the rechargeable battery is obtained by reading sensor data installed in the charging device through the BMS. Optionally, the sensor can be any one or more of a voltage sensor, a current sensor, a power sensor, a temperature sensor, or other sensors capable of detecting the status of the rechargeable battery. Exemplarily, the voltage change of the rechargeable battery is obtained by reading voltage data from a voltage sensor installed in the charging device; the charging current of the rechargeable battery is obtained by reading current data from a current sensor installed in the charging device; and the temperature of the rechargeable battery is obtained by reading temperature data from a temperature sensor installed in the charging device.

[0081] Exemplarily, the battery status of the rechargeable battery is obtained by exchanging data with the internal management system of the rechargeable battery. Data exchange can be performed through a communication interface in the internal management system of the rechargeable battery. Exemplarily, the BMS sends a query instruction to the internal management system of the rechargeable battery, requesting the internal management system to return the battery status of the rechargeable battery.

[0082] S202: Determine a target charging stage of the rechargeable battery according to the battery status of the rechargeable battery.

[0083] Based on the battery status of the rechargeable battery, the current charging stage of the battery is determined, thereby obtaining a target charging stage that the rechargeable battery needs to go through during the charging process. The target charging stage is the specific stage that the rechargeable battery is in during the charging process. Optionally, the target charging stage includes multiple different charging stages. Exemplarily, the target charging stage includes a constant current charging stage, a constant voltage charging stage, and a trickle charging stage.

[0084] In the process of determining the target charging stage of the rechargeable battery according to the battery status of the rechargeable battery, the target charging stage of the rechargeable battery can be determined according to multiple battery indicators in the battery status of the rechargeable battery, or according to a certain battery indicator in the battery status of the rechargeable battery.

[0085] Optionally, the target charging stage of the rechargeable battery is determined based on the SOC in the battery state of the rechargeable battery. Exemplarily, when the charging stages include: a constant current charging stage, a constant voltage charging stage, and a trickle charging stage, when the SOC is less than or equal to 30%, the target charging stage is determined to be the constant current charging stage; when the SOC is greater than or equal to 80%, the target charging stage is determined to be the constant voltage charging stage; when the SOC is greater than 99%, the target charging stage is determined to be the trickle charging stage. Those skilled in the art should understand that the values ​​30%, 80% and 99% here are only used as a feasible example and are not intended to limit the way to determine the target charging stage of the rechargeable battery based on the SOC of the rechargeable battery. In actual operation, these values ​​can be flexibly adjusted according to the type of battery, usage scenario, environmental conditions and design requirements of the BMS.

[0086] Optionally, the target charging stage of the rechargeable battery is determined based on the battery temperature and voltage in the battery status of the rechargeable battery. Exemplarily, when the charging stages include: a preheating stage, a constant voltage charging stage, and a cooling stage, if the battery temperature is lower than a preset heating threshold, the target charging stage of the rechargeable battery is determined to be the preheating stage; if the battery voltage reaches a preset voltage threshold, the target charging stage of the rechargeable battery is determined to be the constant voltage charging stage; if the battery temperature is higher than a preset high temperature threshold, the target charging stage of the rechargeable battery is determined to be the cooling stage.

[0087] S203. Calculate the charging time of the target charging stage according to the charging time calculation strategy corresponding to the target charging stage. The charging time calculation strategy is pre-set based on the charging characteristics of the target charging stage.

[0088] Based on the target charging stage, a charging time calculation strategy corresponding to the target charging stage is determined. A charging time calculation strategy is a pre-defined method or formula for calculating charging time based on the characteristics of the rechargeable battery at different target charging stages. This calculation method can be dynamically adjusted based on the characteristics of the charging stage to improve the accuracy of the remaining charging time prediction. The charging time calculation strategy corresponding to the target charging stage is then used to calculate the charging time for the target charging stage.

[0089] The target charging stage charging characteristics are the physical and chemical characteristics of the battery during the target charging stage. Exemplarily, the charging characteristics include: current stability during the constant current charging stage, voltage stability during the constant voltage charging stage, and temperature variation during the heating stage.

[0090] S204: Obtain the remaining charging time of the rechargeable battery based on the charging time consumed in the target charging stage.

[0091] The remaining charging time refers to the total time required for the rechargeable battery to complete charging from the current moment, which is obtained by accumulating the charging time consumed in the target charging stage.

[0092] For example, it is assumed that the target charging stage includes: a constant current charging stage, a constant voltage charging stage and a trickle charging stage. Among them, the charging time in the constant current charging stage is 0.5 hours, the charging time in the constant voltage charging stage is 0.2 hours, and the charging time in the trickle charging stage is 0.1 hours. The remaining charging time of the rechargeable battery is 0.5+0.2+0.1=0.8 hours. At the same time, since the state of the battery will continue to change during the actual charging process, the remaining charging time needs to be dynamically updated. In the case of the above example, when the battery enters the constant voltage charging stage from the constant current charging stage, the charging time in the constant voltage charging stage is recalculated to be 0.18 hours and the charging time in the trickle charging stage is 0.1 hours, and the remaining charging time is updated to 0.18+0.1=0.28 hours.

[0093] The remaining charging time determination method provided in the embodiment of the present application provides basic data support for subsequent charging stage judgment and charging time calculation by obtaining the battery status of the rechargeable battery, such as the power, temperature or voltage. According to the battery status of the rechargeable battery, the target charging stage that the rechargeable battery needs to go through when charging is determined, so that targeted processing can be performed according to the characteristics of different charging stages, avoiding the problem of low accuracy in determining the remaining charging time caused by adopting a single calculation strategy. According to the charging time calculation strategy of different target charging stages, the charging time of the target charging stage is calculated, which can effectively reduce errors and improve the accuracy of determining the remaining charging time. By pre-setting the charging time calculation strategy based on the charging characteristics of the target charging stage, the charging characteristics of different charging stages can be fully considered, and a suitable and reliable charging time calculation strategy can be provided for each charging stage. By accumulating the charging time of different target charging stages, the remaining charging time of the rechargeable battery is obtained, which can dynamically reflect the real-time progress of the charging process and ensure the accuracy of the remaining charging time determination.

[0094] Figure 3 Schematic diagram of the process of determining the remaining charging time provided in the embodiment of the present application Figure 2 .like Figure 3 As shown, this embodiment Figure 2 Based on the embodiment, a method for determining the remaining charging time is described in detail. The method includes:

[0095] In one possible implementation, the battery status includes at least the current battery temperature, the current cell voltage, and the current battery charge; step S202 may further include:

[0096] S2021: When the current battery temperature is less than or equal to a first temperature threshold, determine that the target charging stage of the rechargeable battery at least includes a heating charging stage.

[0097] The heating charging stage ensures that the rechargeable battery can be charged at a more suitable temperature, ensuring that the rechargeable battery can be charged safely and efficiently in a low-temperature environment. The first temperature threshold is a preset temperature value used to determine whether the current target charging stage of the rechargeable battery includes a heating charging stage, in combination with the battery temperature of the rechargeable battery. When the current battery temperature is less than or equal to the first temperature threshold, it is determined that the target charging stage of the rechargeable battery includes at least a heating charging stage. When the current battery temperature is greater than the first temperature threshold, it is determined that the target charging stage of the rechargeable battery does not include a heating charging stage.

[0098] The first temperature threshold may be a fixed value in degrees Celsius, such as 0°C, 3°C, 5°C, 6.2°C or other feasible fixed values ​​in degrees Celsius; the first temperature threshold may also be a value obtained by dynamically adjusting according to the health status of the battery.

[0099] Assume the first temperature threshold is set at 5°C. When the battery temperature of the rechargeable battery reaches 3°C, it is determined that the target charging phase includes at least a heating charging phase. During the heating charging phase, the charging station heats the rechargeable battery with a low current until the battery temperature reaches a preset exit heating temperature, at which point the heating charging phase ends. For example, the preset exit heating temperature can be a fixed value in degrees Celsius.

[0100] In one possible implementation, the first temperature threshold is determined based on experimental data from a battery cell charge and discharge experiment. Specifically, charge and discharge experiments are performed on the battery cells at different ambient temperatures. The ambient temperature should at least include temperatures that the rechargeable battery may encounter in actual operation. Exemplary ambient temperatures include various possible temperatures such as -20°C, -10°C, -5°C, 0°C, and 10°C. During the charge and discharge experiment, the experimental data of the rechargeable battery is recorded, where the experimental data may include: cell voltage, charging current, temperature, and charging time.

[0101] According to the experimental data, the charging characteristics of the rechargeable battery under low temperature conditions, especially the temperature range of the occurrence of lithium plating in the battery, are analyzed to determine the temperature point at which lithium plating begins. The temperature point at which lithium plating begins is used as the first temperature threshold. The lithium plating phenomenon will reduce the performance of the rechargeable battery and increase the probability of safety hazards. Therefore, if the current battery temperature of the rechargeable battery is lower than the temperature point at which lithium plating begins, the target charging stage of the rechargeable battery should include a heating charging stage. For example, if the experimental data shows that the battery begins to plating lithium at -5°C, the first temperature threshold can be set to -5°C to ensure that heating is started before the battery enters the lithium plating temperature range.

[0102] S2022: When the current cell voltage is less than the preset current reduction voltage, determine that the target charging stage of the rechargeable battery at least includes a constant current charging stage and a cyclic current reduction stage.

[0103] Single cell voltage is the voltage value of a single battery cell in a rechargeable battery. In a rechargeable battery composed of multiple battery cells connected in series or parallel, single cell voltage is an important battery indicator that reflects the battery status of the rechargeable battery.

[0104] The preset current reduction voltage can be a voltage predefined by the charging personnel based on experience; it can also be a voltage determined through computer modeling; or it can be a voltage determined based on the experimental results of the charge and discharge experiment. For example, if the preset current reduction voltage is a voltage predefined by the charging personnel based on experience. The preset current reduction voltage can be a fixed value in volts, such as 3.8V, 4.0V, 4.2V or other fixed values ​​in volts set according to the battery characteristics. For example, if the preset current reduction voltage is a voltage determined based on the experimental results of the charge and discharge experiment. The preset current reduction voltage can be a fixed value determined based on the experimental data of the battery cell charge and discharge test. Specifically, based on the two integrated charging strategies of the constant current charging stage and the cyclic current reduction stage, combined with the test data obtained from the battery cell charge and discharge test, the voltage change inflection point of the rechargeable battery in the non-platform area and high state of charge range is determined, and the change inflection point is used as the preset current reduction voltage.

[0105] If the current cell voltage is less than the preset dropout voltage, the battery has not yet reached the stage where the charging current needs to be reduced. In this case, the target charging phase includes at least a constant current charging phase and a cyclic dropout phase. The constant current charging phase is used for fast charging, while the cyclic dropout phase is used to gradually reduce the charging current after the cell voltage of the battery is first greater than or equal to the preset dropout voltage, ensuring the safety and efficiency of the charging process.

[0106] S2023: When the current battery temperature is greater than a first temperature threshold, the current cell voltage is greater than or equal to a preset current reduction voltage, and the battery charge is less than 100%, determine that the target charging stage of the rechargeable battery is a cyclic current reduction stage.

[0107] When the current battery temperature is higher than a first temperature threshold, the current battery temperature is a temperature suitable for charging the rechargeable battery. When the current cell voltage reaches or exceeds a preset dropout voltage, the rechargeable battery is about to be fully charged. When the battery capacity has not yet reached 100%, it indicates that the rechargeable battery is still not fully charged. By determining that the target charging stage of the rechargeable battery is the cyclic dropout stage when the current battery temperature is higher than the first temperature threshold, the current cell voltage is higher than or equal to the preset dropout voltage, and the battery charge is less than 100%, it is possible to ensure that the battery state of the rechargeable battery meets the conditions for entering the cyclic dropout stage, thereby effectively determining the target charging stage.

[0108] For example, assuming the first temperature threshold is set to 5°C and the preset reduced current voltage is 3.8V, if the current battery temperature is greater than 5°C, the current cell voltage is greater than or equal to 3.8V, and the battery capacity is less than 100%, the target charging stage of the rechargeable battery is determined to be the reduced current stage.

[0109] In one possible implementation, when the target charging stage includes a heating charging stage, step S203 may further include:

[0110] S2031. Obtain a second temperature threshold and a preset temperature change.

[0111] When the target charging phase includes a heating phase, calculating the charging duration for the target charging phase requires obtaining a second temperature threshold and a preset temperature change. The second temperature threshold is the temperature at which the battery exits the heating phase. During the heating phase, if the battery's current temperature is detected to be greater than or equal to the second temperature threshold, the battery exits the heating phase and enters the next target charging phase.

[0112] In one possible implementation, the second temperature threshold is determined based on experimental data from a battery cell charge and discharge experiment. Specifically, a battery cell charge and discharge experiment is performed at different ambient temperatures. During the charge and discharge experiment, the experimental data of the rechargeable battery is recorded.

[0113] Based on experimental data, the temperature change curve of the rechargeable battery during the heating process is analyzed to determine a second temperature threshold suitable for charging. When charging is performed at a temperature corresponding to the second temperature threshold and a temperature above the second temperature threshold, the lithium ion activity of the battery can be guaranteed, while overheating during the heating and charging phase can be avoided, thus saving energy and improving the charging performance of the rechargeable battery. For example, if experimental data shows that when the battery temperature reaches 8°C, the lithium ion activity of the battery can support relatively safe and fast charging, then the second temperature threshold can be set to 5°C.

[0114] In one possible implementation, the temperature change is determined based on experimental data from battery cell charge and discharge tests. Specifically, the battery cells are subjected to charge and discharge tests at different ambient temperatures. During the charge and discharge tests, the experimental data of the rechargeable battery is recorded. Based on the experimental data, the relationship between the rechargeable battery temperature and time is analyzed to determine the preset temperature change.

[0115] S2032: Calculate the temperature difference between the second temperature threshold and the current battery temperature.

[0116] The temperature difference between the second temperature threshold and the current battery temperature reflects the gap between the current battery temperature of the rechargeable battery and the temperature corresponding to the second temperature threshold required in the heating charging stage.

[0117] For example, assuming that the second temperature threshold is set to 5° C. and the current battery temperature is 2° C., the temperature difference between the second temperature threshold and the current battery temperature is calculated to be 5° C.-2° C.=3° C.

[0118] S2033. Calculate the ratio between the temperature difference and the preset temperature change to obtain the charging time in the heating charging stage.

[0119] According to the charging time determination formula of the heating charging stage, the ratio between the temperature difference and the preset temperature change is calculated to obtain the charging time of the heating charging stage. The charging time determination formula of the heating charging stage is:

[0120]

[0121] Among them, D heat Indicates the charging time during the heating charging phase, T off Indicates the second temperature threshold, T min Indicates the current battery temperature, T off -T min Indicates the temperature difference, and ΔT indicates the preset temperature change.

[0122] For example, if the second temperature threshold is 5°C, the current battery temperature is 2°C, and the preset temperature change is 0.5°C per minute, the charging time in the heating charging phase is determined by the formula:

[0123]

[0124] In a possible implementation, when the target charging stage includes a constant current charging stage, step S203 may further include:

[0125] S2034: Based on the current state of charge in the battery state and the preset interval, divide the constant current charging phase into multiple sub-phases through multiple state of charge nodes.

[0126] The current state of charge is the current percentage of the battery's charge. The current state of charge can be determined based on the battery capacity of the rechargeable battery and the battery charge of the rechargeable battery. Exemplarily, the current state of charge = (battery charge ÷ battery capacity) × 100%. The preset interval is a fixed value used to determine the SOC range of each sub-stage of the constant current charging stage when dividing the constant current charging stage. The size of the preset interval can be set according to actual conditions. Exemplarily, the size of the preset interval is set to 10%, and the SOC range of each sub-stage of the constant current charging stage is 10%. The state of charge node is a plurality of SOC points divided according to the preset interval in the constant current charging stage, which is used to divide the constant current charging stage into multiple sub-stages.

[0127] For example, if the current state of charge is 83% and the preset interval is 5%, multiple state of charge nodes are determined based on the preset intervals: 85%, 90%, 95%, and 100%. Then, based on the state of charge nodes and the current state of charge, the constant current charging phase is divided into multiple sub-phases: 83%-85%, 85%-90%, 90%-95%, and 95%-100%.

[0128] S2035 : Determine the charging temperature corresponding to each sub-stage according to the current state of charge and each state of charge node, based on a preset correspondence between the state of charge of the rechargeable battery and the battery temperature.

[0129] Based on the current state of charge and each state of charge node, combined with the correspondence between the state of charge of the rechargeable battery and the battery temperature, the corresponding charging temperature of each sub-stage is determined. This can ensure that in determining the remaining time of each sub-stage, the predicted charging temperature of the rechargeable battery is more closely matched with the actual situation, thereby improving the accuracy of determining the remaining time of each sub-stage, thereby improving charging efficiency and battery life.

[0130] The corresponding relationship between the state of charge (SOC) of a rechargeable battery and its temperature can be determined by analyzing the battery's historical charging data. During the charging process, the battery's current SOC and corresponding battery temperature are recorded in real time to obtain historical charging data. This historical charging data is grouped according to different SOC intervals, and statistical analysis is performed on the battery temperature data within each SOC interval to determine the average, maximum, and minimum temperatures within each SOC interval. Through regression analysis or other statistical methods, a mathematical model is established between the SOC and battery temperature within each SOC interval. By summarizing the mathematical models between the SOC and battery temperature across all SOC intervals, the corresponding relationship between the battery's SOC and temperature is determined.

[0131] S2036: Determine the charging time corresponding to each sub-stage according to each sub-stage and the charging temperature corresponding to each sub-stage.

[0132] There are multiple specific methods for determining the charging time corresponding to each sub-stage based on each sub-stage and the charging temperature corresponding to each sub-stage. For example, based on each sub-stage and the charging temperature corresponding to each sub-stage, a charging time prediction model is used to predict the charging time corresponding to each sub-stage. For example, based on each sub-stage and the charging temperature corresponding to each sub-stage, a charging time determination formula is used to obtain the charging time corresponding to each sub-stage. It should be understood by those skilled in the art that there are multiple specific methods for determining the charging time corresponding to each sub-stage. The above examples are merely feasible examples, intended to facilitate understanding of the technical solutions of the present application, and should not be construed as limiting the technical solutions of the present application.

[0133] S2037: Accumulate and sum the charging times corresponding to the multiple sub-stages to obtain the charging time consumed by the rechargeable battery in the constant current charging stage.

[0134] The charging time in the constant current charging phase refers to the total time required for the battery to charge from the initial SOC at the constant current charging phase to the target SOC in the constant current charging phase when the target charging phase is the constant current charging phase. The charging time in the constant current charging phase is the cumulative sum of the charging times corresponding to all sub-phases.

[0135] For example, if the number of sub-stages is n, and the charging time corresponding to each sub-stage is D1, D2, ..., D n The charging time of the rechargeable battery in the constant current charging stage is D charge For: D charge =D1+D2+…+D n .

[0136] In one possible implementation, when the number of target charging stages is one and the target charging stage is a cyclic current reduction stage, that is, the rechargeable battery can be fully charged only through the cyclic current reduction stage, step S203 may further include:

[0137] S2038: Determine the charging time in the cycle current reduction phase according to the current state of charge in the battery state and the preset charging time value.

[0138] According to the current state of charge in the battery status and the preset charging time value, the charging time of the cycle-down phase is determined by the charging time determination formula of the cycle-down phase. The charging time determination formula of the cycle-down phase is:

[0139]

[0140] Among them, the charging time in the D cycle current reduction stage is D temp is the preset charging time value; SOC tempis the current state of charge, SOC now The state of charge node closest to the current state of charge.

[0141] Optionally, the preset charging time value is obtained by analyzing the time required for the rechargeable battery to enter the cycle current reduction stage and to be fully charged based on the results of the charging test experiment of the rechargeable battery.

[0142] For example, assuming that the current state of charge of the rechargeable battery is 80%, the preset charging time value is 30 minutes, and the state of charge node closest to the current state of charge is 90%, we obtain:

[0143]

[0144] Based on this, it is determined that the charging time during the cycle down-current phase is 15 minutes.

[0145] In a possible implementation, when there are multiple target charging stages and the target charging stage is a cyclic current reduction stage, the preset charging time value is determined as the charging time consumption in the cyclic current reduction stage.

[0146] Accordingly, step S204 may further include:

[0147] S2041: When there are multiple target charging stages, the charging times of all target charging stages are accumulated and summed to obtain the remaining charging time of the rechargeable battery.

[0148] If the rechargeable battery includes multiple target charging stages, it is necessary to accumulate and sum the charging times of all target charging stages to obtain the remaining charging time of the rechargeable battery.

[0149] For example, assume the target charging phase for a rechargeable battery includes a heating charging phase, a constant current charging phase, and a cyclic current reduction phase; and that the charging time for the heating charging phase is 10 minutes, the charging time for the constant current charging phase is 30 minutes, and the charging time for the cyclic current reduction phase is 20 minutes. By summing the charging times for all target charging phases, the remaining charging time for the rechargeable battery is: 10 minutes + 30 minutes + 20 minutes = 60 minutes.

[0150] S2042: When the number of target charging stages is 1, the charging time of the target charging stage is used as the remaining charging time of the rechargeable battery.

[0151] When the number of target charging stages is 1, the target charging stage is a cyclic current reduction stage, and the charging time in the cyclic current reduction stage is used as the remaining charging time of the rechargeable battery.

[0152] The method for determining the remaining charging time provided in the embodiment of the present application determines the target charging stage of the rechargeable battery according to the battery state of the rechargeable battery, accurately identifies the target charging stage, adopts different charging time calculation strategies for different target charging stages, calculates the charging time of the target charging stage, avoids the problem of low accuracy of the remaining charging time caused by adopting a single charging time calculation strategy, and improves the accuracy and reliability of the determination of the remaining charging time. In particular, when the target charging stage is the constant current charging stage, by subdividing the constant current charging stage into multiple sub-stages, determining the charging problem of each sub-stage, accurately calculating the charging time of each sub-stage, and accurately determining the charging time of the constant current charging stage. By subdividing the sub-stages and calculating the charging time corresponding to the sub-stages, the characteristics of each sub-stage can be effectively combined, and the accuracy of determining the remaining charging time can be significantly improved.

[0153] In a possible implementation, step S2036 may further include:

[0154] Step 1: For a target sub-phase, determine the charging current of the target sub-phase according to the charging temperature corresponding to the target sub-phase, the starting state of charge node corresponding to the target sub-phase, and the current receiving threshold in the battery state; the target sub-phase is any one of the multiple sub-phases.

[0155] Based on the charging temperature corresponding to the target sub-phase and the starting state of charge node corresponding to the target sub-phase, the acceptable current range of the rechargeable battery is determined by the corresponding relationship between the charge and discharge current of the rechargeable battery and the state of charge, and the corresponding relationship between the charge and discharge current of the rechargeable battery and the battery temperature. The charging current of the target sub-phase is determined based on the acceptable current range of the rechargeable battery and the current acceptance threshold in the battery status.

[0156] In one example, the correspondence between the charge and discharge current and state of charge of a rechargeable battery, as well as the correspondence between the charge and discharge current and battery temperature of the rechargeable battery, can be obtained by analyzing the historical charging data of the rechargeable battery. During the charging process, the charge and discharge current of the battery, the current state of charge of the rechargeable battery, and the corresponding battery temperature are recorded in real time to obtain historical charging data. The historical charging data is grouped according to different charge and discharge currents to obtain multiple charge and discharge current intervals. The current state of charge and the corresponding battery temperature within each charge and discharge current interval are statistically analyzed to obtain the correspondence between the charge and discharge current and state of charge within each charge and discharge current interval, and the correspondence between the charge and discharge current and battery temperature within each charge and discharge current interval. The correspondence between the charge and discharge current and state of charge within all charge and discharge current intervals is summarized to obtain the correspondence between the charge and discharge current and state of charge of the rechargeable battery; the correspondence between the charge and discharge current and battery temperature within all charge and discharge current intervals is summarized to obtain the correspondence between the charge and discharge current and battery temperature of the rechargeable battery.

[0157] For example, assume that the starting SOC of the target sub-phase is 30%, the corresponding charging temperature of the target sub-phase is 25°C, and the current acceptance threshold in the battery status is 1C. Based on the charging temperature of 25°C and the starting SOC of 30% corresponding to the target sub-phase, the acceptable current range for the charging battery is determined to be 0.5C-1.2C. Based on the acceptable current range for the charging battery and the current acceptance threshold in the battery status, the charging current of the target sub-phase is determined to be 1C.

[0158] Step 2: Calculate the charge difference between the starting state-of-charge node and the ending state-of-charge node corresponding to the target sub-phase; wherein the starting state-of-charge node and the ending state-of-charge node are the state-of-charge nodes at both ends of the target sub-phase.

[0159] For example, assuming that the starting SOC node of the target sub-phase is 30% and the ending SOC node is 35%, the charge difference between the starting SOC node and the ending SOC node corresponding to the target sub-phase is 35%-30%=5%.

[0160] Step 3: Calculate the charging time corresponding to the target sub-stage based on the charge difference of the target sub-stage, the charging current, and the battery system capacity in the battery state.

[0161] Based on the charge difference of the target sub-stage, the charging current, and the battery system capacity in the battery state, the charging time corresponding to the target sub-stage is calculated using the charging time determination formula of the target sub-stage. The charging time determination formula of the target sub-stage is:

[0162]

[0163] Among them, D n Indicates the charging time corresponding to the nth target sub-stage; SOC n Indicates the termination state of charge node corresponding to the nth target sub-stage; SOC n-1 Indicates the starting state of charge node corresponding to the nth target sub-stage; SOC n -SOC n-1 Indicates the charge difference of the nth target sub-stage; C cell Indicates the battery system capacity in the battery state; I n Indicates the charging current of the nth target sub-stage.

[0164] For example, assume that the starting SOC of the third target sub-stage is 30%, the ending SOC is 35%, and the charge difference is 5%. The battery system capacity is 100Ah, and the charging current is 100A. According to the charging time determination formula for the target sub-stage, the charging time corresponding to the target sub-stage is calculated as:

[0165]

[0166] Figure 4 This is a schematic diagram of the structure of the device for determining the remaining charging time provided in an embodiment of the present application. Figure 4 As shown, the remaining charging time determination device 40 provided in this embodiment includes:

[0167] An acquisition module 401 is used to acquire the battery status of the rechargeable battery;

[0168] Processing module 402 is used to determine the target charging stage of the rechargeable battery according to the battery status of the rechargeable battery; calculate the charging time of the target charging stage according to the charging time calculation strategy corresponding to the target charging stage; the charging time calculation strategy is pre-set according to the charging characteristics of the target charging stage; and obtain the remaining charging time of the rechargeable battery based on the charging time of the target charging stage.

[0169] In a possible implementation, the battery status includes at least the current battery temperature, the current cell voltage, and the current battery charge. The processing module 402 is further configured to:

[0170] When the current battery temperature is less than or equal to a first temperature threshold, determining that the target charging stage of the rechargeable battery at least includes a heating charging stage;

[0171] When the current cell voltage is less than the preset current reduction voltage, determining that the target charging stage of the rechargeable battery includes at least a constant current charging stage and a cyclic current reduction stage;

[0172] When the current battery temperature is greater than the first temperature threshold, the current cell voltage is greater than or equal to the preset current reduction voltage, and the battery power is less than 100%, the target charging stage of the rechargeable battery is determined to be the cycle current reduction stage.

[0173] In a possible implementation, when the target charging stage includes a heating charging stage, the processing module 402 is specifically configured to:

[0174] Obtaining a second temperature threshold and a preset temperature change;

[0175] calculating a temperature difference between a second temperature threshold and a current battery temperature;

[0176] The ratio between the temperature difference and the preset temperature change is calculated to obtain the charging time in the heating charging stage.

[0177] In a possible implementation, when the target charging stage includes a constant current charging stage, the processing module 402 is specifically configured to:

[0178] Dividing the constant current charging phase into a plurality of sub-phases via a plurality of state-of-charge nodes based on a current state of charge in the battery state and a preset interval;

[0179] Determine the charging temperature corresponding to each sub-stage based on the current state of charge and each state of charge node and a preset correspondence between the state of charge of the rechargeable battery and the battery temperature;

[0180] Determine the charging time corresponding to each sub-stage based on each sub-stage and the charging temperature corresponding to each sub-stage;

[0181] The charging time corresponding to the multiple sub-stages is accumulated and summed to obtain the charging time consumed by the rechargeable battery in the constant current charging stage.

[0182] In a possible implementation, the processing module 402 is further configured to:

[0183] For a target sub-phase, determining a charging current for the target sub-phase based on a charging temperature corresponding to the target sub-phase, a starting state-of-charge node corresponding to the target sub-phase, and a current receiving threshold in the battery state; the target sub-phase is any one of the multiple sub-phases;

[0184] Calculating a charge difference between a starting state-of-charge node and an ending state-of-charge node corresponding to a target subphase; wherein the starting state-of-charge node and the ending state-of-charge node are the state-of-charge nodes at both ends of the target subphase;

[0185] The charging time corresponding to the target sub-stage is calculated based on the charge difference of the target sub-stage, the charging current, and the battery system capacity in the battery state.

[0186] In a possible implementation, the target charging stage is a cyclic current reduction stage, and the processing module 402 is specifically configured to:

[0187] The charging time in the cycle down phase is determined based on the current state of charge in the battery state and the preset charging time value.

[0188] The device for determining the remaining charging time provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effects are similar and will not be described in detail in this embodiment.

[0189] Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 5 As shown, the electronic device 50 provided in this embodiment includes: at least one processor 501 and a memory 502. Optionally, the device 50 further includes a communication component 503. The processor 501, the memory 502 and the communication component 503 are connected via a bus 504.

[0190] In a specific implementation process, at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that the at least one processor 501 performs the above method.

[0191] The specific implementation process of the processor 501 can be found in the above method embodiment. Its implementation principle and technical effects are similar and will not be repeated here in this embodiment.

[0192] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), etc. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly implemented by a hardware processor or implemented by a combination of hardware and software modules in the processor.

[0193] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory.

[0194] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be divided into address buses, data buses, control buses, etc. For ease of presentation, the buses in the drawings of the embodiments of the present application are not limited to just one bus or just one type of bus.

[0195] An embodiment of the present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0196] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, any of the above methods is implemented.

[0197] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile memory device or a combination thereof, such as static random-access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0198] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in a device as discrete components.

[0199] The division of units is merely a logical functional division; actual implementations may employ alternative divisions, such as combining or integrating multiple units or components into another system, or omitting or disabling certain features. Furthermore, any direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units, either through an interface, electrical, mechanical, or other means.

[0200] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0201] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0202] If the function is implemented in the form of 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, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and other media that can store program code.

[0203] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0204] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A method for determining remaining charging time, characterized in that: Applications in battery management systems, including: Get the battery status of the rechargeable battery; determining a target charging stage of the rechargeable battery according to a battery state of the rechargeable battery; Calculating the charging time of the target charging stage according to a charging time calculation strategy corresponding to the target charging stage; the charging time calculation strategy is pre-set based on the charging characteristics of the target charging stage; Based on the charging time consumed in the target charging stage, the remaining charging time of the rechargeable battery is obtained.

2. The method according to claim 1, characterized in that The battery state includes at least a current battery temperature, a current cell voltage, and a current battery charge. Determining a target charging stage of the rechargeable battery according to the battery state of the rechargeable battery includes: When the current battery temperature is less than or equal to a first temperature threshold, determining that the target charging stage of the rechargeable battery at least includes a heating charging stage; When the current cell voltage is less than a preset current reduction voltage, determining that the target charging stage of the rechargeable battery at least includes a constant current charging stage and a cyclic current reduction stage; When the current battery temperature is greater than the first temperature threshold, the current cell voltage is greater than or equal to the preset current reduction voltage, and the battery charge is less than 100%, the target charging stage of the rechargeable battery is determined to be the cyclic current reduction stage.

3. The method according to claim 2, characterized in that When the target charging stage includes the heating charging stage, calculating the charging time of the target charging stage according to the charging time calculation strategy corresponding to the target charging stage includes: Obtaining a second temperature threshold and a preset temperature change; calculating a temperature difference between the second temperature threshold and the current battery temperature; The ratio of the temperature difference to the preset temperature change is calculated to obtain the charging time in the heating charging stage.

4. The method according to claim 2, characterized in that When the target charging stage includes the constant current charging stage, calculating the charging time of the target charging stage according to the charging time calculation strategy corresponding to the target charging stage includes: Dividing the constant current charging phase into a plurality of sub-phases through a plurality of state of charge nodes based on a current state of charge in the battery state and a preset interval; Determining a charging temperature corresponding to each of the sub-stages according to the current state of charge and each state of charge node and based on a preset correspondence between the state of charge of the rechargeable battery and the battery temperature; Determining a charging time corresponding to each substage according to each substage and a charging temperature corresponding to each substage; The charging times corresponding to the multiple sub-stages are accumulated and summed to obtain the charging time consumed by the rechargeable battery in the constant current charging stage.

5. The method according to claim 4, characterized in that The determining, according to each sub-stage and the charging temperature corresponding to each sub-stage, the charging time corresponding to each sub-stage includes: For a target sub-phase, determining a charging current for the target sub-phase based on a charging temperature corresponding to the target sub-phase, a starting state-of-charge node corresponding to the target sub-phase, and a current receiving threshold in the battery state; the target sub-phase being any one of the plurality of sub-phases; Calculating a charge difference between the starting state-of-charge node and the ending state-of-charge node corresponding to the target sub-phase; wherein the starting state-of-charge node and the ending state-of-charge node are the state-of-charge nodes at both ends of the target sub-phase; The charging time corresponding to the target sub-stage is calculated according to the charge difference of the target sub-stage, the charging current, and the battery system capacity in the battery state.

6. The method according to claim 2, characterized in that The target charging stage is the cyclic current reduction stage, and the charging time calculation strategy corresponding to the target charging stage is used to calculate the charging time of the target charging stage, including: The charging time in the cycle current reduction phase is determined according to the current state of charge in the battery state and a preset charging time value.

7. A device for determining remaining charging time, characterized in that: include: An acquisition module, used to obtain the battery status of the rechargeable battery; a processing module, configured to determine a target charging stage of the rechargeable battery according to a battery state of the rechargeable battery; Calculating the charging time of the target charging stage according to the charging time calculation strategy corresponding to the target charging stage; The charging time calculation strategy is pre-set according to the charging characteristics of the target charging stage; based on the charging time of the target charging stage, the remaining charging time of the rechargeable battery is obtained.

8. An electronic device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed.

10. A computer program product, characterized in that The method comprises a computer program, which implements the method according to any one of claims 1 to 6 when the computer program is executed.

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