Charging method, equipment and device, battery management system, power utilization device and storage medium

Abstract

The invention relates to the technical field of battery charging, and provides a charging method, equipment and device, a battery management system, a power utilization device and a storage medium. The charging method comprises the steps of obtaining a historical discharge depth of a battery; determining the next charging starting time of the battery; according to the historical discharge depth and the charging starting time, a predicted discharge depth of the battery between the current time and the charging starting time is determined, and the predicted discharge depth is determined according to a demand discharge depth corresponding to the occupation time of the current time and the charging starting time in the calendar period by dividing and counting the historical discharge depth based on the calendar period; according to the predicted discharge depth and the target residual electric quantity, the charging cut-off electric quantity of the battery is determined, and the charging cut-off electric quantity is determined according to the result that the predicted discharge depth is compared with the target residual electric quantity and the full electric quantity. Therefore, the charging cut-off electric quantity of the battery is dynamically determined in combination with the historical charging habit of the user on the battery, and the flexibility of determining the charging cut-off electric quantity is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery charging, in particular to a charging method, device and apparatus, a battery management system, a power consumption device and a storage medium. BACKGROUND

[0002] With the gradual consumption of non-renewable resources such as oil and the urgent need for environmental protection, the development of new energy industry is highly valued. One of the key and core technologies of the new energy industry is the battery, and the power consumption device using rechargeable batteries as power sources also develops rapidly. Based on this, the cycle charging technology of the battery is increasingly concerned by people.

[0003] Among them, during the process of battery charging, the charging cut-off SOC (Stage of Charge, remaining capacity) as an important parameter, has an impact on the performance of the battery, and even affects the service life of the battery. Therefore, during the process of battery charging, the charging cut-off SOC needs to be flexibly set.

[0004] However, in the related art, the battery charging strategy is fixed, and the determination of the charging cut-off SOC lacks flexibility. SUMMARY

[0005] Therefore, the present application provides a charging method, device and apparatus, a battery management system, a power consumption device and a storage medium, which can improve the flexibility of determining the charging cut-off capacity.

[0006] To this end, the first aspect of the present application provides a charging method.

[0007] The second aspect of the present application provides a battery management system.

[0008] The third aspect of the present application provides a charging device.

[0009] The fourth aspect of the present application provides a charging apparatus.

[0010] The fifth aspect of the present application provides a power consumption device.

[0011] The sixth aspect of the present application provides a computer-readable storage medium.

[0012] Therefore, the first aspect of the present application provides a charging method, comprising: obtaining a historical discharge depth of a battery; determining a next start charging time of the battery; determining a predicted discharge depth of the battery between a current time and the next start charging time according to the historical discharge depth and the next start charging time, the predicted discharge depth being determined based on a calendar week division statistical historical discharge depth and a required discharge depth corresponding to an occupied time of the current time and the next start charging time in the calendar week; and determining a charging cut-off capacity of the battery according to the predicted discharge depth and a target remaining capacity, the charging cut-off capacity being determined according to a comparison result of the predicted discharge depth with the target remaining capacity and a full capacity.

[0013] The charging method provided by the present application obtains a previous historical discharge depth of a battery and determines a next start charging time of the battery during charging of the battery. On this basis, the historical discharge depth is statistically divided based on a calendar week, and a predicted discharge depth of the battery between a current time and the next start charging time is predicted according to a required discharge depth corresponding to an occupied time of the current time and the next start charging time in the calendar week, and then a charging cut-off capacity of the battery in the current charging is determined according to a comparison result of the predicted discharge depth with a target remaining capacity and a full capacity. During charging of the battery, the predicted discharge depth of the battery before the next charging is predicted based on a historical discharge depth of the battery, and the charging cut-off capacity of the battery in the current charging is determined based on the predicted discharge depth, so as to dynamically determine the charging cut-off capacity of the battery in combination with a historical charging habit of the user, thereby improving flexibility of determination of the charging cut-off capacity.

[0014] In some technical solutions, the historical discharge depth of the battery is obtained, comprising: recording a first capacity of the battery every day in a historical period and a second capacity of each charging; determining a discharge depth of the battery every day in the historical period according to the first capacity and the second capacity; calculating a first average value and a first standard deviation of the discharge depth of each calendar day in a calendar week; and calculating a required discharge depth of each calendar day in the calendar week according to the first average value and the first standard deviation.

[0015] In the technical solution, in the process of obtaining the historical discharge depth of the battery, the first electric quantity of the battery every day in the historical period is recorded, and the second electric quantity of the battery every time of charging in the historical period is recorded. On this basis, according to the recorded first electric quantity and the second electric quantity, the discharge depth of the battery every day in the historical period is determined, the recorded discharge depth in the historical period is divided according to the calendar week, the first average value and the first standard deviation of the discharge depth of each calendar day in the calendar week are calculated, and then according to the first average value and the first standard deviation corresponding to each calendar day in the calendar week, the required discharge depth of each calendar day in the calendar week is calculated. By recording and managing the electric quantity data of the battery every day in the historical period and the electric quantity data of each time of charging, the historical discharge depth of the battery is determined, and the convenience and accuracy of subsequent control of battery charging based on the historical discharge depth of the battery are improved.

[0016] In some technical solutions, optionally, according to the historical discharge depth and the start charging time, the predicted discharge depth of the battery between the current time and the start charging time is determined, including: according to the current time and the start charging time, at least one calendar day in the calendar week is determined; according to the required discharge depth corresponding to the at least one calendar day, the predicted discharge depth is determined.

[0017] In the technical solution, in the process of determining the predicted discharge depth of the battery, at least one calendar day is determined from the seven days of the calendar week according to the current time and the next start charging time of the battery, and then the required discharge depth corresponding to the determined at least one calendar day is obtained from the recorded historical discharge depth, and the predicted discharge depth of the battery between the current time and the next start charging time is determined according to the required discharge depth corresponding to the at least one calendar day. In this way, based on the statistical historical discharge depth divided according to the calendar week, the required discharge depth of each day in the calendar week is determined, and then according to the required discharge depth corresponding to the occupied time of the current time and the next start charging time of the battery in the calendar week, the predicted discharge depth of the battery before the next charging is predicted, which improves the accuracy and reliability of the determined predicted discharge depth.

[0018] In some technical solutions, optionally, according to the predicted discharge depth and the target remaining electric quantity, the charging cutoff electric quantity of the battery is determined, including: a second value is determined according to the sum of the predicted discharge depth and a first value; in the case that the second value is greater than the target remaining electric quantity, and the second value is less than the full electric quantity, the charging cutoff electric quantity is determined as the second value, the target remaining electric quantity is less than the full electric quantity; in the case that the second value is greater than or equal to the full electric quantity, the charging cutoff electric quantity is determined as the full electric quantity; in the case that the second value is less than or equal to the target remaining electric quantity, the charging cutoff electric quantity is determined as the target remaining electric quantity.

[0019] In the technical solution, in the process of determining the charging cut-off capacity of the battery according to the predicted discharge depth and the target residual capacity, the predicted discharge depth is added to a first value to obtain a second value, and then the second value is compared with the preset target residual capacity and the full capacity respectively. In the case that the second value is greater than the target residual capacity and the second value is less than the full capacity, the second value is set as the charging cut-off capacity of the battery in this charging. The target residual capacity is less than the full capacity. In the case that the second value is greater than or equal to the full capacity, the full capacity is set as the charging cut-off capacity of the battery in this charging. In the case that the second value is less than or equal to the target residual capacity, the target residual capacity is set as the charging cut-off capacity of the battery in this charging. In this way, based on the difference between the predicted discharge depth of the battery before the next charging and the preset target residual capacity and the full capacity, the charging cut-off capacity of the battery in this charging is determined, which can reduce the case that the battery is full of electricity, improve the flexibility and rationality of the determination of the charging cut-off capacity, and help to prolong the service life of the battery.

[0020] In some technical solutions, optionally, the charging method further comprises: obtaining the residual capacity of the battery at the current time; and in the case that the second value is less than or equal to the residual capacity, canceling the charging operation of the battery.

[0021] In the technical solution, in the process of charging the battery, the residual capacity of the battery at the current time is also obtained. In the case that the second value is less than or equal to the residual capacity, it indicates that the current residual capacity of the battery is sufficient to support the use of the battery before the next charging, at this time, the charging operation of the battery in this time is canceled, and the battery is not charged. In this way, in the case that the residual capacity of the battery still supports subsequent use, the battery is not charged, which reduces the case that the battery is in a high state of charge for a long time, and helps to prolong the service life of the battery.

[0022] In some technical solutions, optionally, the target residual capacity is the charging cut-off capacity used by the battery with the longest service life after charging the same type of battery under the same charging condition and different charging cut-off capacities.

[0023] In the technical solution, the target residual power is determined according to the correspondence between the charging cutoff power and the service life of the battery. Specifically, the target residual power is the charging cutoff power of the battery with the longest service life after charging under the same charging condition and different charging cutoff powers. That is, under the same charging condition, the service life of the battery when the target residual power is used as the charging cutoff power is longer than the service life of the battery when the residual power other than the target residual power is used as the charging cutoff power. That is, under the same charging condition, the service life of the battery when the target residual power is used as the charging cutoff power is the longest. In this way, the charging cutoff power that causes the least damage to the service life of the battery can be selected under the premise of meeting the power demand of the battery, which helps to prolong the service life of the battery.

[0024] In some technical solutions, optionally, determining the start charging time of the next charging of the battery comprises: determining the start charging time in response to a user input.

[0025] In the technical solution, in the process of determining the start charging time of the next charging of the battery, the start charging time set by the user can be determined in response to a user input. In this way, the start charging time of the next charging of the battery is directly set by the user without prediction, which improves the accuracy of the determined start charging time.

[0026] In some technical solutions, optionally, determining the start charging time of the next charging of the battery comprises: in the case where user authorization information indicating that the charging resource of the battery is sufficient is obtained, determining the same time of the next day as the current time as the start charging time.

[0027] In the technical solution, in the process of determining the start charging time of the next charging of the battery, the same time of the next day as the current time can be determined as the start charging time in the case where user authorization information indicating that the charging resource of the battery is sufficient is obtained, that is, the battery performs the charging operation at the same time every day. In this way, the start charging time of each subsequent charging of the battery can be determined based on one authorization of the user, which improves the accuracy of the determined start charging time and reduces the user operation.

[0028] In some technical solutions, optionally, the charging method further comprises: recording the charging start time of each charging of the battery in a historical period; counting the distribution probability of the plurality of charging start times in the historical period; and determining the start charging time of the next charging of the battery, comprising: in the case where there is at least one charging start time with a distribution probability greater than a preset probability threshold, determining the start charging time according to the current time and the at least one charging start time.

[0029] In the technical solution, the charging start time of each charging of the battery in the historical period is also recorded, and the distribution probability of the plurality of charging start times of the battery in the historical period is counted. On this basis, in the process of determining the start charging time of the next charging of the battery, if there is at least one charging start time with a distribution probability greater than a preset probability threshold in the recorded plurality of charging start times, it indicates that the charging start times of the battery in the historical period are highly concentrated. At this time, the start charging time of the next charging of the battery is determined according to the current time and the at least one charging start time with the distribution probability greater than the preset probability threshold. In this way, in the case that the charging start times of the battery in the historical period are highly concentrated, the start charging time of the next charging of the battery is predicted based on the charging start time with a higher frequency in the historical period, thereby improving the accuracy of the determined start charging time.

[0030] In some technical solutions, optionally, determining the start charging time of the next charging of the battery comprises: in the case that there is no charging start time with a distribution probability greater than a preset probability threshold, calculating the interval duration of each adjacent two charging start times in the historical period to obtain a plurality of interval durations; calculating a second average value and a second standard deviation of the plurality of interval durations; and determining the start charging time according to the current time, the second average value and the second standard deviation.

[0031] In the technical solution, in the process of determining the start charging time of the next charging of the battery, if there is no charging start time with a distribution probability greater than a preset probability threshold in the recorded plurality of charging start times, it indicates that the charging start times of the battery in the historical period are dispersedly distributed. At this time, the interval duration between each adjacent two charging start times of the battery in the historical period is calculated to obtain a plurality of interval durations, and a second average value and a second standard deviation of the plurality of interval durations are calculated, and then the start charging time of the next charging of the battery is determined according to the current time, the second average value and the second standard deviation. In this way, in the case that the charging start times of the battery in the historical period are dispersedly distributed, the start charging time of the next charging of the battery is predicted based on the distribution rule of the charging start times of the battery in the historical period, thereby improving the accuracy of the determined start charging time.

[0032] The second aspect of the present application provides a battery management system, comprising: a control circuit connected with a battery, configured to obtain a historical discharge depth of the battery; determine a next start charging time of the battery; determine a predicted discharge depth of the battery between a current time and the start charging time according to the historical discharge depth and the start charging time; determine a charging cutoff capacity of the battery according to the predicted discharge depth and a target remaining capacity, the predicted discharge depth being determined based on a calendar week division statistical historical discharge depth according to a required discharge depth corresponding to an occupied time of the current time and the start charging time in a calendar week, and the charging cutoff capacity being determined according to a numerical comparison result of the predicted discharge depth with the target remaining capacity and a full capacity respectively; and a first communication module connected with the control circuit and a charging device, configured to send a charging instruction to the charging device according to the charging cutoff capacity, so as to control the charging device to charge the battery.

[0033] The battery management system provided by the second aspect of the present application comprises a control circuit and a first communication module. The control circuit is connected with a battery, and the first communication module is connected with the control circuit and a charging device respectively. In the process of charging the battery, the control circuit obtains a previous historical discharge depth of the battery and determines a next start charging time of the battery. On this basis, the control circuit statistically obtains the historical discharge depth based on a calendar week division, and then predicts a predicted discharge depth of the battery between a current time and the next start charging time according to a required discharge depth corresponding to an occupied time of the current time and the start charging time in a calendar week, and further determines a charging cutoff capacity of the battery in this charging according to a numerical comparison result of the predicted discharge depth with a target remaining capacity and a full capacity respectively. The first communication module then sends a charging instruction to the charging device according to the charging cutoff capacity determined by the control circuit, so as to control the charging device to charge the battery. In the process of charging the battery, the predicted discharge depth of the battery before the next charging is predicted based on the historical discharge depth of the battery, and the charging cutoff capacity of the battery in this charging is determined based on the predicted discharge depth, and then the battery is controlled to charge based on the charging cutoff capacity. The charging cutoff capacity of the battery can be dynamically determined in combination with the historical charging habit of the user, the flexibility of determining the charging cutoff capacity is improved, and thus the flexibility of battery charging control is improved.

[0034] The third aspect of the present application provides a charging device, comprising: a second communication module connected with a battery management system, configured to receive a charging instruction issued by the battery management system; wherein the charging instruction is generated by the battery management system according to a charging cutoff capacity determined by a predicted discharge depth and a target remaining capacity; the predicted discharge depth is determined by the battery management system according to a historical discharge depth of the battery and a next start charging time of the battery, and is a predicted discharge depth of the battery between a current time and the start charging time; the predicted discharge depth is determined based on a calendar week division statistical historical discharge depth and a required discharge depth corresponding to an occupied time of the current time and the start charging time in the calendar week; and the charging cutoff capacity is determined according to a numerical comparison result of the predicted discharge depth with the target remaining capacity and a full capacity respectively; and a charging circuit connected with the battery and the second communication module, configured to charge the battery in response to the charging instruction until the remaining capacity of the battery reaches the charging cutoff capacity.

[0035] The third aspect of the present application provides a charging device, comprising a second communication module and a charging circuit. The second communication module is connected with a battery management system, and the charging circuit is connected with the battery and the second communication module respectively. In the process of charging the battery, the second communication module receives a charging instruction issued by the battery management system. The charging instruction is generated by the battery management system according to a charging cutoff capacity determined by a predicted discharge depth and a target remaining capacity. The charging cutoff capacity is determined by the battery management system according to a numerical comparison result of the predicted discharge depth with the target remaining capacity and a full capacity respectively. The predicted discharge depth is determined by the battery management system according to a historical discharge depth of the battery and a next start charging time of the battery, and is a predicted discharge depth of the battery between a current time and the start charging time. The predicted discharge depth is determined by the battery management system based on a calendar week division statistical historical discharge depth and a required discharge depth corresponding to an occupied time of the current time and the start charging time in the calendar week. On this basis, the charging circuit charges the battery in response to the charging instruction until the remaining capacity of the battery reaches the charging cutoff capacity, and stops charging the battery. In the process of charging the battery, the battery is controlled to charge based on the charging cutoff capacity determined by the historical discharge depth of the battery, which can dynamically control the charging cutoff capacity of the battery in combination with the historical charging habits of the user, and improves the flexibility of battery charging control.

[0036] The fourth aspect of the present application provides a charging device, comprising: a processing unit configured to obtain a historical depth of discharge of a battery; the processing unit is further configured to determine a next start charging time of the battery; the processing unit is further configured to determine a predicted depth of discharge of the battery between a current time and the next start charging time according to the historical depth of discharge and the next start charging time, the predicted depth of discharge being determined based on a statistical historical depth of discharge according to a required depth of discharge corresponding to an occupancy time of the current time and the next start charging time in a calendar week; and the processing unit is further configured to determine a charging cut-off capacity of the battery according to the predicted depth of discharge and a target remaining capacity, the charging cut-off capacity being determined according to a comparison result of the predicted depth of discharge with the target remaining capacity and a full capacity respectively.

[0037] The fourth aspect of the present application provides a charging device, comprising a processing unit. In the process of charging the battery, the processing unit obtains a historical depth of discharge of the battery, and determines a next start charging time of the battery. On this basis, the processing unit determines a predicted depth of discharge of the battery between a current time and the next start charging time according to a statistical historical depth of discharge and a required depth of discharge corresponding to an occupancy time of the current time and the next start charging time in a calendar week, and then determines a charging cut-off capacity of the battery in the current charging according to a comparison result of the predicted depth of discharge with a target remaining capacity and a full capacity respectively. In the process of charging the battery, the predicted depth of discharge of the battery before the next charging is predicted based on the historical depth of discharge of the battery, and the charging cut-off capacity of the battery in the current charging is determined based on the predicted depth of discharge, so as to dynamically determine the charging cut-off capacity of the battery in combination with the historical charging habit of the user, and improve the flexibility of determining the charging cut-off capacity.

[0038] The fifth aspect of the present application provides a power consumption device, comprising: a processor and a memory storing computer program instructions, and the processor implements the steps of the charging method of the first aspect when executing the computer program instructions.

[0039] Therefore, the power consumption device provided by the fifth aspect of the present application has all the beneficial effects of the charging method of the first aspect, which will not be repeated here.

[0040] The sixth aspect of the present application provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the charging method of the first aspect.

[0041] Therefore, the computer readable storage medium provided by the sixth aspect of the present application has all the beneficial effects of the charging method of the first aspect, which will not be repeated here.

[0042] Additional aspects and advantages of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the application. BRIEF DESCRIPTION OF DRAWINGS

[0043] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood by considering the following detailed description, taken in conjunction with the accompanying drawings, in which:

[0044] Figure 1 Structure diagram of a vehicle in some embodiments of the present application;

[0045] Figure 2 Structure explosion diagram of a battery in some embodiments of the present application;

[0046] Figure 3 Flow diagram of a charging method in some embodiments of the present application;

[0047] Figure 4 Flow diagram of a charging method in some embodiments of the present application;

[0048] Figure 5 Flow diagram of a charging method in some embodiments of the present application;

[0049] Figure 6 Flow diagram of a charging method in some embodiments of the present application;

[0050] Figure 7 Flow diagram of a charging method in some embodiments of the present application;

[0051] Figure 8 Flow diagram of a charging method in some embodiments of the present application;

[0052] Figure 9 Flow diagram of a charging method in some embodiments of the present application;

[0053] Figure 10 Flow diagram of a charging method in some embodiments of the present application;

[0054] Figure 11 Flow diagram of a charging method in some embodiments of the present application;

[0055] Figure 12 Flow diagram of a charging method in some embodiments of the present application;

[0056] Figure 13 Structure block diagram of a charging device in some embodiments of the present application;

[0057] Figure 14 Structure block diagram of an electric device in some embodiments of the present application;

[0058] Figure 15 One of structural block diagrams of a battery management system and a charging device in some embodiments of the present application;

[0059] Figure 16 One of structural block diagrams of a battery management system and a charging device in some embodiments of the present application;

[0060] In the correspondence between the reference signs and the component names, the following correspondence is used:

[0061] 1 vehicle, 20 controller, 30 motor;

[0062] 10 battery, 11 box body, 111 first box body, 112 second box body, 12 battery cell;

[0063] 700 charging device, 702 processing unit;

[0064] 800 power consumption device, 802 memory, 804 processor;

[0065] 1000 battery management system, 1002 control circuit, 1004 first communication module, 900 charging device, 902 second communication module, 904 charging circuit. DETAILED DESCRIPTION

[0066] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0067] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0068] At present, new energy batteries are more and more widely used in life and industry. New energy is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles in many fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0069] In modern battery technology, the use of rechargeable batteries as power sources for electrical devices has also developed rapidly. Based on this, the cycle charging technology of the battery has been increasingly concerned by people. Among them, in the process of battery charging, the charging cut-off SOC as an important parameter has an impact on the performance of the battery, and even affects the service life of the battery. Therefore, in the process of battery charging, it is necessary to flexibly set the charging cut-off SOC.

[0070] In the related art, for the charging cut-off SOC, the following adjustment schemes are included: a voltage curve-based adjustment scheme: in the charging process, since the voltage of the battery presents a nonlinear relationship with the change of SOC, the end voltage of the battery is monitored to identify the charging cut-off point; a current change-based adjustment scheme: since in the constant voltage charging stage, the charging current of the battery will gradually decrease, based on the reduction of the charging current of the battery to a certain threshold, it is determined that the battery is fully charged; a temperature change-based adjustment scheme: in the charging process, since the temperature of the battery will rise due to chemical reaction and resistance loss, the charging state of the battery is determined by monitoring the temperature change of the battery; an intelligent adjustment scheme based on machine learning: by collecting multi-dimensional data such as voltage, current, and temperature of the battery, and combining a battery aging model, the charging cut-off point is determined. However, the above battery charging strategies are fixed, and the determination of the charging cut-off SOC lacks flexibility.

[0071] Based on the above considerations, in order to improve the flexibility of the determination of the charging cut-off capacity, the embodiment of the present application proposes a charging method, which obtains the previous historical discharge depth of the battery and determines the next start charging time of the battery in the process of charging the battery. On this basis, the historical discharge depth is statistically divided based on the calendar week, and then the predicted discharge depth of the battery between the current time and the next start charging time is predicted according to the required discharge depth corresponding to the occupation time of the current time and the start charging time in the calendar week, and then the charging cut-off capacity of the battery in this charging is determined according to the numerical comparison result of the predicted discharge depth with the target remaining capacity and the full capacity. In this way, in the process of battery charging, the predicted discharge depth of the battery before the next charging is predicted based on the historical discharge depth of the battery, and the charging cut-off capacity of the battery in this charging is determined based on the predicted discharge depth, so as to dynamically determine the charging cut-off capacity of the battery in combination with the historical charging habits of the user, thereby improving the flexibility of the determination of the charging cut-off capacity.

[0072] The charging method disclosed by the embodiments of the present application is used for controlling battery charging. The battery can be used for a power consumption device using the battery as a power source, or various energy storage systems using the battery as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0073] With reference to Figure 1 , Figure 1 A structural schematic diagram of a vehicle 1 is provided for some embodiments of the present application. The vehicle 1 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The vehicle 1 is internally provided with a battery 10, which can be arranged at the bottom, the head, or the tail of the vehicle 1. The battery 10 can be used for power supply of the vehicle 1, for example, the battery 10 can be used as an operating power source of the vehicle 1. The vehicle 1 can further include a controller 20 and a motor 30, the controller 20 being used to control the battery 10 to supply power to the motor 30, for example, for power demand of the vehicle 1 during starting, navigation, and driving.

[0074] In some embodiments of the present application, the battery 10 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1.

[0075] With reference to Figure 2 , Figure 2 A structural exploded view of the battery 10 is provided for some embodiments of the present application. The battery 10 includes a box body 11 and a plurality of battery monomers 12, which are accommodated in the box body 11. The box body 11 is used to provide an assembly space for the battery monomers 12, and the box body 11 can adopt various structures. In some embodiments, the box body 11 can include a first box body 111 and a second box body 112, the first box body 111 and the second box body 112 are mutually covered, and the first box body 111 and the second box body 112 jointly define an assembly space for accommodating the battery monomers 12. The second box body 112 can be a hollow structure with one end open, and the first box body 111 can be a plate-shaped structure, which is covered on the open side of the second box body 112 to jointly define the assembly space with the second box body 112. The first box body 111 and the second box body 112 can also be hollow structures with one side open, and the open side of the first box body 111 is covered on the open side of the second box body 112. Of course, the box body 11 formed by the first box body 111 and the second box body 112 can have various shapes, such as a cylinder, a cuboid, etc.

[0076] In the battery 10, a plurality of battery cells 12 can be connected in series or in parallel or in a mixed manner, where the mixed manner refers to a manner in which a plurality of battery cells 12 are connected in series and in parallel. The plurality of battery cells 12 can be directly connected in series or in parallel or in a mixed manner, and the plurality of battery cells 12 are accommodated in the case 11 as a whole. Of course, the battery 10 can also be in a form in which a plurality of battery cells 12 are connected in series or in parallel or in a mixed manner to form a battery module, and a plurality of battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the case 11. The battery 10 can also include other structures, for example, the battery 10 can also include a busbar component for realizing electrical connection between the plurality of battery cells 12.

[0077] In the embodiments of the present application, the battery 10 can be a secondary battery, which refers to a battery 10 that can be activated by charging after discharging to continue to be used. The battery 10 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a nanometal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-chromium battery, a lead-acid battery, etc., which are not limited in the embodiments of the present application. The battery 10 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, which are not limited in the embodiments of the present application. The battery 10 is generally divided into three types according to the packaging method: cylindrical batteries, square batteries and soft package batteries, which are not limited in the embodiments of the present application.

[0078] The charging method, the charging device 700, the power consumption device 800, the charging equipment 900 and the battery management system 1000 of some embodiments of the present application will be described below with reference to Figures 3 to 16 , which are flowcharts of the charging method provided by some embodiments of the present application. Figure 3 is one of the flowcharts of the charging method provided by some embodiments of the present application; Figure 4 is another flowchart of the charging method provided by some embodiments of the present application; Figure 5 is a third flowchart of the charging method provided by some embodiments of the present application; Figure 6 is a fourth flowchart of the charging method provided by some embodiments of the present application; Figure 7 is a fifth flowchart of the charging method provided by some embodiments of the present application; Figure 8 is a sixth flowchart of the charging method provided by some embodiments of the present application; Figure 9 is a seventh flowchart of the charging method provided by some embodiments of the present application; Figure 10 is an eighth flowchart of the charging method provided by some embodiments of the present application; Figure 11 is a ninth flowchart of the charging method provided by some embodiments of the present application; Figure 12 is a tenth flowchart of the charging method provided by some embodiments of the present application; Figure 13 is a structural block diagram of the charging device 700 provided by some embodiments of the present application;Figure 14 is a structural block diagram of the power utilization device 800 provided by some embodiments of the present application; Figure 15 is one of the structural block diagrams of the battery management system 1000 and the charging device 900 provided by some embodiments of the present application; Figure 16 is the other of the structural block diagrams of the battery management system 1000 and the charging device 900 provided by some embodiments of the present application.

[0079] As shown in Figure 3 , a charging method provided by some embodiments of the present application includes the following S402 to S408:

[0080] S402, obtaining a historical discharge depth of the battery;

[0081] S404, determining a next start charging time of the battery;

[0082] S406, determining a predicted discharge depth of the battery between the current time and the start charging time according to the historical discharge depth and the start charging time;

[0083] S408, determining a charging cutoff capacity of the battery according to the predicted discharge depth and a target remaining capacity;

[0084] wherein the predicted discharge depth is determined based on calendar week division statistics of the historical discharge depth and a required discharge depth corresponding to an occupied time of the calendar week between the current time and the start charging time, and the charging cutoff capacity is determined according to a numerical comparison result of the predicted discharge depth with the target remaining capacity and a full capacity respectively.

[0085] wherein the historical discharge depth is used to indicate a DOD (Depth of Discharge) of the battery in the past.

[0086] The current time is a time of starting the charging operation of the battery this time, and the start charging time is a time of starting the charging operation of the battery next time.

[0087] The predicted discharge depth is a predicted DOD of the battery possibly used in a period from the current time to the next charging.

[0088] The target remaining capacity is a pre-stored numerical value, and a specific value of the target remaining capacity can be set by a person skilled in the art according to actual conditions, which is not specifically limited in the present application.

[0089] The charging cutoff capacity is a condition for stopping charging of the battery, and in the process of charging the battery, when the remaining capacity of the battery reaches the set charging cutoff capacity, it means that the battery is charged.

[0090] A calendar week contains seven calendar days, namely Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.

[0091] The required discharge depth of each calendar day in a calendar week is the discharge depth that each calendar day in the calendar week is likely to need to use based on historical discharge depth statistics.

[0092] Full power refers to 100% power.

[0093] Specifically, in the charging method provided by the embodiments of the present application, during charging of the battery, the previous historical discharge depth of the battery is obtained, and the next start charging time of the battery is determined. On this basis, the historical discharge depth is divided and counted based on the calendar week, and then the predicted discharge depth of the battery between the current time and the next start charging time is predicted according to the required discharge depth corresponding to the occupied time of the current time and the start charging time in the calendar week, and then the charging cutoff power of the battery in this charging is determined according to the comparison result of the predicted discharge depth with the target remaining power and the full power, respectively.

[0094] The above charging method, during charging of the battery, predicts the predicted discharge depth of the battery before the next charging based on the historical discharge depth of the battery, and determines the charging cutoff power of the battery in this charging based on the predicted discharge depth, so as to dynamically determine the charging cutoff power of the battery in combination with the historical charging habits of the user, thereby improving the flexibility of the determination of the charging cutoff power.

[0095] In some embodiments, as shown in FIG. 4, the above S402 can specifically include the following S402a-S402d: Figure 4

[0096] S402a, record the first power of the battery every day and the second power of each charging in the historical period;

[0097] S402b, determine the discharge depth of the battery every day in the historical period according to the first power and the second power;

[0098] S402c, calculate the first average value and the first standard deviation of the discharge depth of each calendar day in a calendar week;

[0099] S402d, calculate the required discharge depth of each calendar day in a calendar week according to the first average value and the first standard deviation.

[0100] The historical period is a period of time before the current time.

[0101] ​In practical applications, the aforementioned historical period can specifically be 3 months, 80 days, 75 days, 2 months, 45 days, or 1 month prior to the current time. Those skilled in the art can set the specific duration of the historical period according to the actual situation, and this application does not impose specific restrictions.

[0102] The first battery level is used to indicate the daily change in battery power. Specifically, the first battery level may include a first starting battery level and a first ending battery level. The first starting battery level is the remaining battery power before each day's use, and the first ending battery level is the remaining battery power after the last use of the day.

[0103] The second charge level is used to indicate the change in battery charge level during each charge. Specifically, the second charge level may include a second starting charge level and a second ending charge level. The second starting charge level is the remaining charge level of the battery before each charge begins, and the second ending charge level is the remaining charge level of the battery after each charge ends.

[0104] The daily depth of discharge refers to the actual depth of discharge used by the battery each day. In practical applications, the daily depth of discharge can be calculated using the following formula:

[0105] DOD = SOC1 - SOC2 + ΔSOC;

[0106] Where DOD represents the depth of discharge of the battery each day, SOC1 represents the first starting charge of the battery each day, SOC2 represents the first ending charge of the battery each day, and ΔSOC represents the change in charge of the battery each day due to charging. ΔSOC is related to the second charge of the battery each day. Specifically, ΔSOC is the sum of the differences between the second ending charge and the second starting charge of the battery each day. In other words, ΔSOC is the cumulative charge of the battery each day.

[0107] The first average value is the average depth of discharge used by the battery on each calendar day of the calendar week within a historical period.

[0108] The first standard deviation is the standard deviation of the depth of discharge used by the battery on each calendar day of the calendar week within a historical period.

[0109] For example, for Monday, the first mean is the average depth of discharge used by the battery across all Mondays in the historical period, and the first standard deviation is the standard deviation of the depth of discharge used by the battery across all Mondays in the historical period. The first mean and first standard deviation for Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday are calculated similarly.

[0110] The required discharge depth for each calendar day in a calendar week is calculated based on the first average and first standard deviation of the discharge depth for each calendar day in a calendar week within a historical period, representing the discharge depth that may be needed for each calendar day in a calendar week.

[0111] In actual application process, the demand discharge depth of each calendar day in the calendar week can be calculated by the following formula:

[0112] DOD1=DOD_μ1+2×DOD_σ1;

[0113] DOD2=DOD_μ2+2×DOD_σ2;

[0114] DOD3=DOD_μ3+2×DOD_σ3;

[0115] DOD4=DOD_μ4+2×DOD_σ4;

[0116] DOD5=DOD_μ5+2×DOD_σ5;

[0117] DOD6=DOD_μ6+2×DOD_σ6;

[0118] DOD7=DOD_μ7+2×DOD_σ7;

[0119] Wherein, DOD1 represents the demand discharge depth of Monday, DOD_μ1 represents the first average value of the discharge depth of Monday in the historical period, DOD_σ1 represents the first standard deviation of the discharge depth of Monday in the historical period, DOD2 represents the demand discharge depth of Tuesday, DOD_μ2 represents the first average value of the discharge depth of Tuesday in the historical period, DOD_σ2 represents the first standard deviation of the discharge depth of Tuesday in the historical period, DOD3 represents the demand discharge depth of Wednesday, DOD_μ3 represents the first average value of the discharge depth of Wednesday in the historical period, DOD_σ3 represents the first standard deviation of the discharge depth of Wednesday in the historical period, DOD4 represents the demand discharge depth of Thursday, DOD_μ4 represents the first average value of the discharge depth of Thursday in the historical period, DOD_σ4 represents the first standard deviation of the discharge depth of Thursday in the historical period, DOD5 represents the demand discharge depth of Friday, DOD_μ5 represents the first average value of the discharge depth of Friday in the historical period, DOD_σ5 represents the first standard deviation of the discharge depth of Friday in the historical period, DOD6 represents the demand discharge depth of Saturday, DOD_μ6 represents the first average value of the discharge depth of Saturday in the historical period, DOD_σ6 represents the first standard deviation of the discharge depth of Saturday in the historical period, DOD7 represents the demand discharge depth of Sunday, DOD_μ7 represents the first average value of the discharge depth of Sunday in the historical period, and DOD_σ7 represents the first standard deviation of the discharge depth of Sunday in the historical period.

[0120] Specifically, in the charging method provided in the embodiments of the present application, in the process of obtaining the historical discharge depth of the battery, the first electric quantity of the battery each day in the historical period is recorded, and the second electric quantity of the battery each time of charging in the historical period is recorded. On this basis, the discharge depth of the battery each day in the historical period is determined according to the recorded first electric quantity and second electric quantity, and the discharge depth recorded in the historical period is divided according to the calendar week, the first average value and the first standard deviation of the discharge depth of each calendar day in the calendar week are calculated, and then the required discharge depth of each calendar day in the calendar week is calculated according to the first average value and the first standard deviation corresponding to each calendar day in the calendar week.

[0121] In the above embodiment, by recording and managing the electric quantity data of the battery each day in the historical period and the electric quantity data each time of charging, the historical discharge depth of the battery is determined, and the convenience and accuracy of subsequent control of battery charging based on the historical discharge depth of the battery are improved.

[0122] In some embodiments, as shown in the above S406, the above S406 can specifically include the following S406a and S406b: Figure 5

[0123] S406a, determining at least one calendar day in the calendar week according to the current time and the start charging time;

[0124] S406b, determining the predicted discharge depth according to the required discharge depth corresponding to the at least one calendar day.

[0125] The at least one calendar day in the calendar week is the occupied time of the current time, the start charging time and the interval time therebetween in the calendar week.

[0126] In actual application process, for the calendar day with the remaining duration less than the preset duration, it can be ignored.

[0127] The remaining duration is the occupied duration of each day in the at least one calendar day, which is divided by the current time, the start charging time and the zero point of each day.

[0128] The remaining duration less than the preset duration indicates that the occupied duration of the corresponding calendar day is short, and at this time, the probability of the battery being used in the remaining duration is small.

[0129] In actual application process, the above preset duration can be 8 hours, 7 hours, 6 hours, 5 hours and 4 hours, etc. For the specific value of the preset duration, the person skilled in the art can set it according to the actual situation, and the present application does not make specific limitation.

[0130] The predicted discharge depth can be specifically the cumulative sum of the required discharge depth corresponding to the at least one calendar day.

[0131] ​For example, the current time is Tuesday evening 18:00, and the start charging time is Friday evening 19:00. At this time, at least one calendar day in the calendar week is determined as Wednesday, Thursday and Friday, and the predicted discharge depth ADOD is predicted as DOD3+DOD4+DOD5.

[0132] In actual application, in the process of calculating the predicted discharge depth, the demand discharge depth corresponding to each calendar day can also be calculated by weighting based on the proportion of the remaining time length of each calendar day in the total time length (i.e. 24 hours), so as to improve the accuracy of the predicted discharge depth.

[0133] Specifically, in the charging method provided in the embodiments of the present application, in the process of determining the predicted discharge depth of the battery, at least one calendar day is determined from the seven days of the calendar week according to the current time and the next start charging time of the battery, and then the demand discharge depth corresponding to the determined at least one calendar day is obtained from the recorded historical discharge depth, and the predicted discharge depth of the battery between the current time and the next start charging time is determined according to the demand discharge depth corresponding to the at least one calendar day.

[0134] In the above embodiments, the historical discharge depth is divided and counted based on the calendar week, and the demand discharge depth corresponding to the occupied time of the current time and the start charging time in the calendar week is used to predict the predicted discharge depth of the battery before the next charging, so as to improve the accuracy and reliability of the determined predicted discharge depth.

[0135] In some embodiments, as shown in FIG. 8, the above S408 can specifically include the following S408a-S408d: Figure 6

[0136] S408a, determining a second value according to the sum of the predicted discharge depth and the first value;

[0137] S408b, in the case that the second value is greater than the target remaining amount of electricity and the second value is less than the full amount of electricity, determining the charging cutoff amount of electricity as the second value;

[0138] S408c, in the case that the second value is greater than or equal to the full amount of electricity, determining the charging cutoff amount of electricity as the full amount of electricity;

[0139] S408d, in the case that the second value is less than or equal to the target remaining amount of electricity, determining the charging cutoff amount of electricity as the target remaining amount of electricity;

[0140] Wherein, the target remaining amount of electricity is less than the full amount of electricity.

[0141] ​The first value is a pre-stored value, and in actual application, the first value can be 8%, 9%, 10%, 11%, 12%, etc. The specific value of the first value can be set by a person skilled in the art according to actual conditions, and the application does not make specific limitations.

[0142] Specifically, in the charging method provided in the embodiments of the application, in the process of determining the charging cutoff capacity of the battery according to the predicted discharge depth and the target remaining capacity, the predicted discharge depth is added by a first value to obtain a second value, and then the second value is compared with the preset target remaining capacity and the full capacity respectively. In the case that the second value is greater than the target remaining capacity and the second value is less than the full capacity, the second value is set as the charging cutoff capacity of the battery in this charging. The target remaining capacity is less than the full capacity. In the case that the second value is greater than or equal to the full capacity, the full capacity is set as the charging cutoff capacity of the battery in this charging. In the case that the second value is less than or equal to the target remaining capacity, the target remaining capacity is set as the charging cutoff capacity of the battery in this charging.

[0143] In the above embodiments, the charging cutoff capacity of the battery in this charging is determined based on the difference between the predicted discharge depth of the battery before the next charging and the preset target remaining capacity and the full capacity, which can reduce the case that the battery is in full capacity, improve the flexibility and rationality of the determination of the charging cutoff capacity, and help to prolong the service life of the battery.

[0144] In some embodiments, as shown in FIG. 5, Figure 7 The charging method can further include the following S502 and S504:

[0145] S502, obtaining the remaining capacity of the battery at the current time;

[0146] S504, in the case that the second value is less than or equal to the remaining capacity, canceling the charging operation of the battery.

[0147] The remaining capacity of the battery at the current time is the actual remaining capacity of the battery before the battery starts the current charging operation.

[0148] Specifically, in the charging method provided in the embodiments of the application, the remaining capacity of the battery at the current time is also obtained during the charging of the battery. In the case that the second value is less than or equal to the remaining capacity, it indicates that the current remaining capacity of the battery is sufficient to support the use of the battery before the next charging, at this time, the charging operation of the battery in this time is canceled, and the battery is not charged.

[0149] In the above embodiments, the battery is not charged in the case that the remaining capacity of the battery still supports subsequent use, which reduces the case that the battery is in a high state of charge for a long time, and helps to prolong the service life of the battery.

[0150] In some embodiments, the target remaining capacity is the charging cut-off capacity used by the battery with the longest service life after charging under the same charging condition and different charging cut-off capacities.

[0151] That is, the target remaining capacity is determined according to the correspondence between the charging cut-off capacity and the service life of the battery. Wherein, the service life of the battery when the target remaining capacity is used as the charging cut-off capacity is greater than the service life of the battery when the remaining capacity other than the target remaining capacity is used as the charging cut-off capacity under the same charging condition.

[0152] Specifically, the target remaining capacity is the charging cut-off capacity used by the battery with the longest service life after charging under the same charging current, discharging current, remaining capacity before charging, and temperature, and different charging cut-off capacities.

[0153] For example, the charging conditions of different batteries are shown in Table 1 below, and the service life of different batteries after charging is shown in Table 2 below:

[0154] Table 1

[0155]

[0156] Table 2

[0157]

[0158] Wherein, Life_A1 to Life_A13 represent the service life of the battery with a charging current of 0.2C after charging with different charging cut-off capacities, and Life_B1 to Life_B13 represent the service life of the battery with a charging current of 1C after charging with different charging cut-off capacities.

[0159] On this basis, for the battery using a slow charging pile, that is, for the battery with a charging current of 0.2C, from the batteries with serial numbers 1 to 13, the charging cut-off capacity used by the battery with the longest service life is selected as the target remaining capacity, that is, the charging cut-off capacity used by the battery corresponding to the maximum value in Life_A1 to Life_A13 is selected as the target remaining capacity. For the battery using a fast charging pile, that is, for the battery with a charging current of 1C, from the batteries with serial numbers 14 to 26, the charging cut-off capacity used by the battery with the longest service life is selected as the target remaining capacity, that is, the charging cut-off capacity used by the battery corresponding to the maximum value in Life_B1 to Life_B13 is selected as the target remaining capacity.

[0160] Specifically, in the charging method provided in the embodiments of the present application, the target remaining power is determined according to the correspondence between the charging cutoff power and the service life of the battery. Specifically, the target remaining power is the charging cutoff power used by the battery with the longest service life after charging under the same charging condition and different charging cutoff powers. That is, under the same charging condition, the service life of the battery when the target remaining power is used as the charging cutoff power is longer than the service life of the battery when the remaining power other than the target remaining power is used as the charging cutoff power. That is, under the same charging condition, the service life of the battery when the target remaining power is used as the charging cutoff power is the longest.

[0161] In the above embodiments, under the premise of meeting the power demand of the battery, the charging cutoff power that causes the least damage to the service life of the battery is selected, which helps to prolong the service life of the battery.

[0162] In some embodiments, as shown in the above S404, the above S404 can specifically include the following S404a: Figure 8

[0163] S404a, in response to a user input, determining the start charging time.

[0164] Specifically, the user input can be a touch input of the user on a display screen in the power consumption device, such as a vehicle.

[0165] In actual application, after starting the charging operation of the battery this time, a pop-up window can be displayed on the display screen in the power consumption device, such as a vehicle, and a plurality of times can be displayed in the pop-up window for the user to select the start charging time of the next charging of the battery from the plurality of times. An input box can also be displayed in the pop-up window for the user to input the start charging time of the next charging of the battery.

[0166] Specifically, in the charging method provided in the embodiments of the present application, in the process of determining the start charging time of the next charging of the battery, the start charging time set by the user can be specifically determined in response to a user input.

[0167] In the above embodiments, the start charging time of the next charging of the battery is directly set by the user, without the need for prediction, which improves the accuracy of the determined start charging time.

[0168] In some embodiments, as shown in the above S404, the above S404 can specifically include the following S404b: Figure 9

[0169] S404b, in the case where the user authorization information is obtained, determining the current time at the same time of the next day as the start charging time;

[0170] The user authorization information indicates that the charging resource of the battery is sufficient.​​

[0171] The user authorization information indicates that the battery has sufficient charging resources, and can meet the daily charging of the battery, such as a household charging pile. The user authorization information also indicates that the user allows the battery to be charged at a regular time.

[0172] Specifically, in the charging method provided in the embodiments of the present application, in the process of determining the start charging time of the next charging of the battery, specifically, in the case where the user authorization information indicating that the charging resources of the battery are sufficient and the user allows the battery to be charged at a regular time is obtained, the current time at the same time of the next day is determined as the start charging time, that is, the battery is charged at the same time every day.

[0173] In the above embodiments, based on the user's one-time authorization, the start charging time of each subsequent charging of the battery is determined, which reduces the user's operation on the premise of improving the accuracy of the determined start charging time.

[0174] In some embodiments, as shown in Figure 10 The charging method specifically further includes S602 and S604, and on this basis, as shown in Figure 11 S404 specifically includes S404c:

[0175] S602, record the charging start time of each charging of the battery in the historical period;

[0176] S604, statistics the distribution probability of the plurality of charging start times in the historical period;

[0177] S404c, in the case where there is at least one charging start time with a distribution probability greater than a preset probability threshold, the start charging time is determined according to the current time and the at least one charging start time.

[0178] The charging start time is the time point at which the battery starts each charging operation.

[0179] The distribution probability of each charging start time, that is, the proportion of the frequency of occurrence of each charging start time in the total number of charging of the battery in the historical period.

[0180] The preset probability threshold is a pre-stored value. In actual application, the preset probability threshold can be specifically 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20% and above. For the specific value of the preset probability threshold, those skilled in the art can set it according to the actual situation, and the present application does not make specific limitations.

[0181] In a case where there is a charging start time with a distribution probability greater than the preset probability threshold in the historical period, it is indicated that the charging start times of the battery in the historical period are highly concentrated.

[0182] Specifically, in the charging method provided in the embodiments of the present application, the charging start times of the battery in each charging in the historical period are also recorded, and the distribution probabilities of the multiple charging start times of the battery in the historical period are counted. On this basis, in the process of determining the start charging time of the next charging of the battery, in a case where there is at least one charging start time with a distribution probability greater than the preset probability threshold in the recorded multiple charging start times, it is indicated that the charging start times of the battery in the historical period are highly concentrated, and at this time, the start charging time of the next charging of the battery is determined according to the current time and the at least one charging start time with a distribution probability greater than the preset probability threshold.

[0183] In the above embodiments, in a case where the charging start times of the battery in the historical period are highly concentrated, the start charging time of the next charging of the battery is predicted based on the charging start times with higher occurrence frequencies in the historical period, thereby improving the accuracy of the determined start charging time.

[0184] In some embodiments, as shown in Figure 12 The S404 can specifically include the following S404d to S404f:

[0185] S404d, in a case where there is no charging start time with a distribution probability greater than the preset probability threshold, the interval durations of every two adjacent charging start times in the historical period are calculated to obtain multiple interval durations;

[0186] S404e, the second average value and the second standard deviation of the multiple interval durations are calculated;

[0187] S404f, the start charging time is determined according to the current time, the second average value and the second standard deviation.

[0188] In a case where there is no charging start time with a distribution probability greater than the preset probability threshold in the historical period, it is indicated that the charging start times of the battery in the historical period are discretely distributed.

[0189] At this time, the start charging time can be specifically the sum of the current time, the second average value and 2 times the second standard deviation.

[0190] That is, in actual application process, the start charging time can be calculated by the following formula:

[0191] T = T0 + Time_μ + 2 × Time_σ;

[0192] Wherein, T represents the start charging time, T0 represents the current time, Time_μ represents the second average value, and Time_σ represents the second standard deviation.

[0193] Specifically, in the charging method provided by the embodiments of the present application, in the process of determining the start charging time of the next charging of the battery, in the case that there is no charging start time with a distribution probability greater than a preset probability threshold in the recorded multiple charging start times, it is indicated that the charging start times of the battery in the historical period are discretely distributed, at this time, the interval duration between every two adjacent charging start times of the battery in the historical period is calculated to obtain multiple interval durations, and the second average value and the second standard deviation of the multiple interval durations are calculated, and then the start charging time of the next charging of the battery is determined according to the current time, the second average value and the second standard deviation.

[0194] In the above embodiments, in the case that the charging start times of the battery in the historical period are discretely distributed, the start charging time of the next charging of the battery is predicted based on the distribution rule of the charging start times of the battery in the historical period, and the accuracy of the determined start charging time is improved.

[0195] As shown in FIG. 7, some embodiments of the present application provide a charging device 700, which comprises a processing unit 702 as follows. Figure 13 The processing unit 702 is configured to acquire a historical discharge depth of the battery.

[0196] The processing unit 702 is further configured to determine a start charging time of the next charging of the battery.

[0197] The processing unit 702 is further configured to determine a predicted discharge depth of the battery between the current time and the start charging time according to the historical discharge depth and the start charging time, the predicted discharge depth being determined based on calendar week division statistical historical discharge depth and demand discharge depth corresponding to the occupied time of the current time and the start charging time in the calendar week.

[0198] The processing unit 702 is further configured to determine a charging cutoff capacity of the battery according to the predicted discharge depth and a target remaining capacity, the charging cutoff capacity being determined according to the numerical comparison results of the predicted discharge depth with the target remaining capacity and the full capacity, respectively.

[0199]

[0200] ​Specifically, the charging device 700 provided in this application embodiment includes a processing unit 702. During the charging process of the battery, the processing unit 702 acquires the battery's previous historical depth of discharge and determines the next start time of charging. Based on this, the processing unit 702 statistically analyzes the historical depth of discharge based on calendar weeks, and then predicts the predicted depth of discharge that the battery will generate between the current time and the next start time of charging, based on the required depth of discharge corresponding to the time occupied by the current time and the start time of charging in the calendar week. Furthermore, based on the comparison results of the predicted depth of discharge with the target remaining capacity and the full capacity, the charging cutoff capacity of the battery for this charging is determined.

[0201] During the battery charging process, the aforementioned charging device 700 predicts the battery's depth of discharge before the next charge based on the battery's historical depth of discharge, and determines the charging cutoff capacity of the battery for this charge based on the predicted depth of discharge. By combining the user's historical charging habits of the battery, the charging cutoff capacity of the battery is dynamically determined, thereby improving the flexibility of determining the charging cutoff capacity.

[0202] The charging device 700 provided in this application embodiment can implement the steps of the charging method in any of the above embodiments, and will not be described one by one here.

[0203] like Figure 14 As shown, some embodiments of this application provide an electrical device 800, which includes:

[0204] The memory 802 stores computer program instructions.

[0205] The processor 804 executes the above-described computer program instructions to implement the steps of the charging method as described in any of the above embodiments.

[0206] The memory 802 and the processor 804 can be connected via a bus or other means.

[0207] The memory 802 can be used to store software programs and various data. The memory 802 can mainly include a first storage area for storing computer program instructions and a second storage area for storing data, wherein the first storage area can store an operating system, an application program or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), etc. In addition, the memory 802 can include a volatile memory or a non-volatile memory, or the memory 802 can include both volatile and non-volatile memories. The non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synch link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 802 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0208] The processor 804 can include one or more processing units, and the processor 804 can be a CPU, a DSP, an ASIC, and an FPGA chip, etc. The embodiments of the present application are not limited specifically.

[0209] It should be noted that the power consuming device 800 in the embodiments of the present application includes a mobile power consuming device and a non-mobile power consuming device, and the embodiments of the present application are not limited specifically.

[0210] Specifically, the power consuming device 800 is a device using a battery as a power source, and the battery is used to provide power for the power consuming device 800. The battery can be used as an operating power source of the power consuming device 800, and can also be used as a driving power source of the power consuming device 800.

[0211] In actual application process, the electric device 800 can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0212] The electric device 800 provided by the embodiment includes a memory 802 and a processor 804. When the computer program instructions in the memory 802 are executed by the processor 804, the steps of the charging method in any of the above embodiments are implemented. Therefore, the electric device 800 has all the beneficial effects of the charging method in any of the above embodiments, which will not be repeated here.

[0213] In some embodiments of the present application, as shown in Figure 15 and Figure 16 a battery management system 1000 is further provided. The battery management system 1000 includes a control circuit 1002 and a first communication module 1004. The control circuit 1002 is connected with the battery 10, and the first communication module 1004 is connected with the control circuit 1002 and the charging device 900 respectively. During the charging of the battery 10, the control circuit 1002 acquires the previous historical discharge depth of the battery 10, and determines the next start charging time of the battery 10. On this basis, the control circuit 1002 divides and counts the historical discharge depth based on the calendar week, and then predicts the predicted discharge depth of the battery 10 between the current time and the next start charging time according to the required discharge depth corresponding to the occupation time of the current time and the start charging time in the calendar week, and further determines the charging cutoff capacity of the battery 10 this time according to the comparison result of the predicted discharge depth with the values of the target residual capacity and the full capacity. The first communication module 1004 further sends a charging instruction to the charging device 900 according to the charging cutoff capacity determined by the control circuit 1002, so as to control the charging device 900 to charge the battery 10.

[0214] The charging device 900 is a device for providing power for the battery 10, such as a charging pile, a battery replacement device, etc., which is not specifically limited in the present application.

[0215] The battery management system 1000 and the battery 10 are located in the electric device 800, and the battery 10 is used to provide power for the electric device 800. The battery 10 can be used as an operating power supply of the electric device 800, and can also be used as a driving power supply of the electric device 800.

[0216] The control circuit 1002 is a master module of the battery management system 1000, responsible for calculation and decision. The control circuit 1002 is specifically configured to implement at least one of state monitoring, state analysis, charge and discharge control, safety protection, thermal management, high-voltage power distribution, and information management of the battery 10.

[0217] The first communication module 1004 is responsible for data communication and interaction between the battery management system 1000 and other devices inside the battery management system 1000 or devices outside the battery management system 1000.

[0218] In actual application process, the battery management system 1000 in the present application can also realize the function of the controller in the electric device 800, such as realizing the functions of the vehicle control unit (VCU), the motor control unit (MCU), etc., which is not limited in the present application.

[0219] In actual application process, the charging instruction can contain a charging cut-off electric quantity. At this time, the charging device 900 can monitor the remaining electric quantity of the battery 10, and stop charging the battery 10 when the remaining electric quantity of the battery 10 reaches the charging cut-off electric quantity.

[0220] In actual application process, the charging instruction can also include a charging start instruction and a charging end instruction. The charging start instruction is used to control the charging device 900 to charge the battery 10, and the charging end instruction is used to control the charging device 900 to stop charging the battery 10.

[0221] It should be noted that in actual application process, the battery management system 1000 in the present application can also be integrated as a controller in the battery device, such as integrated in the battery pack, the energy storage cabinet.

[0222] The battery management system 1000 in the present application can also be integrated as a controller in the electric device 800, such as integrated in the vehicle, the vehicle chassis.

[0223] The battery management system 1000 in the present application can also be integrated as a controller in the charging device 900, such as integrated in the charging pile, the battery replacement device.

[0224] The battery management system 1000 in the present application can also be deployed as control software in a server. The server can be a standalone physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud service, cloud database, cloud computing, cloud function, cloud storage, network service, cloud communication, middleware service, domain name service, security service, CDN (Content Delivery Network), and big data and artificial intelligence platform, etc. For example, Internet of Vehicles cloud, APP (Application) background, etc.

[0225] The battery management system 1000 proposed in the present application can predict the predicted discharge depth of the battery 10 before the next charging based on the historical discharge depth of the battery 10 during the charging process of the battery 10, determine the charging cutoff electric quantity of the battery 10 this time based on the predicted discharge depth, and then control the charging of the battery 10 based on the charging cutoff electric quantity, which can dynamically determine the charging cutoff electric quantity of the battery 10 in combination with the historical charging habits of the user for the battery 10, improve the flexibility of the charging cutoff electric quantity determination, and thus improve the flexibility of the battery charging control.

[0226] In some embodiments of the present application, as shown in Figure 3 and Figure 4 a charging device 900 is also provided. The charging device 900 includes a second communication module 902 and a charging circuit 904. The second communication module 902 is connected to the battery management system 1000, and the charging circuit 904 is connected to the battery 10 and the second communication module 902, respectively. During the charging process of the battery 10, the second communication module 902 receives the charging instruction issued by the battery management system 1000. The charging instruction is generated by the battery management system 1000 according to the charging cutoff electric quantity determined by the predicted discharge depth and the target residual electric quantity. The charging cutoff electric quantity is determined by the battery management system 1000 according to the numerical comparison result of the predicted discharge depth with the target residual electric quantity and the full electric quantity, and the predicted discharge depth is determined by the battery management system 1000 according to the historical discharge depth of the battery 10 and the next start charging time of the battery 10, and is the predicted discharge depth of the battery 10 between the current time and the start charging time. The predicted discharge depth is specifically determined by the battery management system 1000 based on the statistical historical discharge depth according to the required discharge depth corresponding to the occupied time of the current time and the start charging time in the calendar week. On this basis, the charging circuit 904 charges the battery 10 in response to the charging instruction until the residual electric quantity of the battery 10 reaches the charging cutoff electric quantity, and stops charging the battery 10.

[0227] The charging device 900 is a device for providing power for the battery 10, such as a charging pile, a battery replacement device, and the like, and the present application does not make specific limitations.

[0228] In actual application, as shown in Figure 5 The charging device 900 can be a device provided independently of the power consumption device 800, such as a household charging pile or a public charging pile.

[0229] Optionally, as shown in Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 15 Figure 16 Figure 15 Figure 16 The charging device 900 can also be a device equipped in the power consumption device 800, such as a vehicle-mounted charging gun or a vehicle-mounted charging machine. At this time, the charging device 900 cooperates with an external power grid or a charging pile to charge the battery 10.

[0230] The second communication module 902 can be connected with the first communication module 1004 in the battery management system 1000, and the second communication module 902 is responsible for data communication and interaction between the charging device 900 and its internal or external devices.

[0231] The charging circuit 904 is a circuit that can be used to output power externally, such as a power supply circuit.

[0232] In actual application, the charging device 900 can start charging the battery 10 and stop charging the battery 10 according to the indication of the charging instruction.

[0233] In actual application, the charging device 900 can also monitor the remaining power of the battery 10, and stop charging the battery 10 when the remaining power of the battery 10 reaches the charging cutoff amount.

[0234] The charging device 900 proposed in the present application controls the charging of the battery 10 based on the charging cutoff amount determined by the historical discharge depth of the battery 10 during the charging process of the battery 10, can dynamically control the charging cutoff amount of the battery 10 in combination with the historical charging habits of the user for the battery 10, and improves the flexibility of battery charging control.

[0235] In some embodiments of the present application, a computer readable storage medium is optionally provided. The computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the charging method in any of the above embodiments.

[0236] The computer readable storage medium can include any medium that can store or transfer information. Examples of the computer readable storage medium include electronic circuits, semiconductor memory devices, read-only memories, random access memories, compact disc read-only memories (CD-ROMs), flash memories, erasable ROMs (EROMs), magnetic tapes, floppy disks, optical disks, hard disks, optical fiber media, radio frequency (RF) links, optical data storage devices, and the like. The code segments can be downloaded via a computer network such as the Internet, an intranet, or the like.

[0237] The computer readable storage medium provided by the embodiments of the present application stores a computer program which, when executed by a processor, can implement the steps of the charging method in any of the above embodiments. Therefore, the computer readable storage medium has all the beneficial effects of the charging method in any of the above embodiments, which will not be repeated here.

[0238] By way of example, the charging method provided by the embodiments of the present application records the first electric quantity of the battery every day within 2 months before the current time, and records the second electric quantity of the battery every time within 2 months before the current time. On this basis, according to the recorded first electric quantity and second electric quantity, the depth of discharge of the battery every day within 2 months before the current time is determined, and the recorded depth of discharge within 2 months before the current time is divided according to the calendar week, the first average value and the first standard deviation of the depth of discharge of each calendar day in the calendar week are calculated, and then the required depth of discharge of each calendar day in the calendar week is calculated according to the first average value and the first standard deviation corresponding to each calendar day in the calendar week. Moreover, the longest service life of the battery is used to select the charging cutoff electric quantity of the battery under the condition of the same charging current, discharging current, remaining electric quantity before charging, and temperature, and different charging cutoff electric quantity.

[0239] In the process of charging the battery, in response to a user input, the start charging time of the next charging of the battery selected by the user is determined, and at least one calendar day is determined from the seven days of the calendar week according to the current time and the start charging time of the next charging of the battery, and then the required depth of discharge corresponding to the determined at least one calendar day is obtained from the recorded historical depth of discharge, and the predicted depth of discharge of the battery between the current time and the start charging time of the next charging is determined according to the required depth of discharge corresponding to the at least one calendar day.

[0240] Based on this, the remaining battery capacity at the current time is obtained. If the remaining capacity is less than or equal to the predicted depth of discharge plus 10%, it means that the current remaining capacity is sufficient to support the battery until the next charge. In this case, the current charging operation will be cancelled, and the battery will not be charged. Otherwise, if the predicted depth of discharge plus 10% is greater than the target remaining capacity but less than 100%, the predicted depth of discharge plus 10% is set as the charging cutoff capacity for this charge. If the predicted depth of discharge plus 10% is greater than or equal to 100%, 100% is set as the charging cutoff capacity for this charge. If the predicted depth of discharge plus 10% is less than or equal to the target remaining capacity, the target remaining capacity is set as the charging cutoff capacity for this charge.

[0241] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0242] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to specific features, structures, materials, or characteristics described in connection with embodiments or examples that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A charging method, characterized in that, include: Obtain the battery's historical depth of discharge; Determine the start time of the next charging cycle for the battery; Based on the historical discharge depth and the start charging time, the predicted discharge depth of the battery between the current time and the start charging time is determined. The predicted discharge depth is determined by statistically analyzing the historical discharge depth based on calendar weeks and the required discharge depth corresponding to the time occupied by the current time and the start charging time in the calendar week. The charging cutoff charge of the battery is determined based on the predicted depth of discharge and the target remaining charge. The charging cutoff charge is determined by comparing the predicted depth of discharge with the target remaining charge and the full charge value, respectively.

2. The charging method according to claim 1, characterized in that, The acquisition of the battery's historical depth of discharge includes: Record the battery's first charge level each day and the second charge level for each charge within a historical period; Based on the first charge level and the second charge level, the depth of discharge of the battery is determined for each day during the historical period. Calculate the first average and first standard deviation of the depth of discharge for each calendar day of the calendar week; The required depth of discharge for each calendar day in the calendar week is calculated based on the first average value and the first standard deviation.

3. The charging method according to claim 2, characterized in that, Determining the predicted depth of discharge of the battery between the current time and the start time based on the historical depth of discharge and the start time of charging includes: Based on the current time and the start charging time, at least one calendar day in the calendar week is determined; The predicted discharge depth is determined based on the required discharge depth corresponding to at least one of the calendar days.

4. The charging method according to claim 1, characterized in that, Determining the charging cutoff level of the battery based on the predicted depth of discharge and the target remaining charge includes: The second value is determined based on the sum of the predicted discharge depth and the first value; If the second value is greater than the target remaining power and less than the full power, the charging cutoff power is determined to be the second value, and the target remaining power is less than the full power. If the second value is greater than or equal to the full charge, the charging cutoff charge is determined as the full charge. If the second value is less than or equal to the target remaining power, the charging cutoff power is determined as the target remaining power.

5. The charging method according to claim 4, characterized in that, The charging method further includes: Obtain the remaining charge of the battery at the current time; If the second value is less than or equal to the remaining power, the charging operation for the battery is cancelled.

6. The charging method according to any one of claims 1 to 5, characterized in that, The target remaining power is the charging cutoff power used by the battery with the longest service life after charging the same type of battery under the same charging conditions but different charging cutoff powers.

7. The charging method according to any one of claims 1 to 5, characterized in that, Determining the start time of the next charging cycle for the battery includes: In response to user input, the start charging time is determined.

8. The charging method according to any one of claims 1 to 5, characterized in that, Determining the start time of the next charging cycle for the battery includes: If user authorization information is obtained, the current time will be determined as the same time on the next day as the start time for charging, and the user authorization information indicates that the battery has sufficient charging resources.

9. The charging method according to any one of claims 1 to 5, characterized in that, The charging method further includes: Record the start time of each charge for the battery within the historical time period; The probability distribution of multiple charging start times within the historical time period is statistically analyzed; Determining the start time of the next charging cycle for the battery includes: If there is at least one charging start time where the probability of the distribution is greater than a preset probability threshold, the charging start time is determined based on the current time and at least one charging start time.

10. The charging method according to claim 9, characterized in that, Determining the start time of the next charging cycle for the battery includes: In the absence of a charging start time with a probability greater than a preset probability threshold, the interval between every two adjacent charging start times within the historical period is calculated to obtain multiple interval durations. Calculate the second average and second standard deviation of the multiple said interval durations; The start charging time is determined based on the current time, the second average value, and the second standard deviation.

11. A battery management system, characterized in that, include: A control circuit, connected to the battery, is used to acquire the battery's historical depth of discharge and determine the start time of the next charging cycle for the battery. Based on the historical discharge depth and the start charging time, the predicted discharge depth of the battery between the current time and the start charging time is determined; based on the predicted discharge depth and the target remaining capacity, the charging cutoff capacity of the battery is determined. The predicted discharge depth is determined by statistically analyzing the historical discharge depth based on calendar weeks, and by the required discharge depth corresponding to the time occupied by the current time and the start charging time in the calendar week. The charging cutoff capacity is determined by comparing the predicted discharge depth with the target remaining capacity and the full capacity values, respectively. The first communication module is connected to the control circuit and the charging device, and is used to send a charging command to the charging device according to the charging cutoff power, so as to control the charging device to charge the battery.

12. A charging device, characterized in that, include: The second communication module, connected to the battery management system, is used to receive charging instructions issued by the battery management system. The charging instructions are generated by the battery management system based on a charging cutoff charge determined by the predicted discharge depth and the target remaining charge. The predicted discharge depth is determined by the battery management system based on the battery's historical discharge depth and the battery's next start charging time, representing the predicted discharge depth between the current time and the start charging time. The predicted discharge depth is determined based on the historical discharge depth, divided into calendar weeks, and the required discharge depth corresponding to the time occupied by the current time and the start charging time within the calendar week. The charging cutoff charge is determined by comparing the predicted discharge depth with the target remaining charge and the full charge value, respectively. A charging circuit, connected to the battery and the second communication module, is used to charge the battery in response to the charging command until the remaining charge of the battery reaches the charging cutoff charge.

13. A charging device, characterized in that, include: The processing unit is used to obtain the battery's historical depth of discharge. The processing unit is also configured to determine the start time of the next charging cycle for the battery; The processing unit is further configured to determine the predicted discharge depth of the battery between the current time and the start charging time based on the historical discharge depth and the start charging time. The predicted discharge depth is determined by statistically analyzing the historical discharge depth based on calendar weeks and the required discharge depth corresponding to the time occupied by the current time and the start charging time in the calendar week. The processing unit is further configured to determine the charging cutoff charge of the battery based on the predicted depth of discharge and the target remaining charge, wherein the charging cutoff charge is determined by comparing the predicted depth of discharge with the target remaining charge and the full charge value respectively.

14. An electrical appliance, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the charging method as described in any one of claims 1 to 10.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the charging method as described in any one of claims 1 to 10.

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