Charging method and device and electronic equipment

Abstract

The invention discloses a charging method and device and electronic equipment. The charging device can obtain the charge state of a to-be-charged battery in the charging process; in response to the state of charge reaching the first state of charge, performing staged charging processing on the to-be-charged battery based on the first charging rate and a preset charging threshold, so that the state of charge of the to-be-charged battery reaches a second state of charge; wherein the first charge state is smaller than the second charge state; performing staged charging processing on the to-be-charged battery based on the second charging rate and a preset charge threshold, so that the charge state of the to-be-charged battery is fully charged; wherein the staged charging processing represents charging processing in which the charge state increment of the to-be-charged battery in each charging stage meets a preset charge threshold value; the preset charge threshold value is smaller than the difference between the full charge state and the first charge state. Based on the scheme, the charging efficiency of the battery under relatively high energy density can be effectively improved, and the charging duration is shortened.

Description

Technical Field

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

[0002] At present, when charging the battery to a higher energy density, such as the state of charge (SOC) is greater than or equal to 80%, due to the accelerated polarization accumulation, lithium plating is likely to occur, and the charging rate needs to be reduced for charging, resulting in longer battery charging time and low charging efficiency. Summary of the invention

[0003] The embodiments of the present application provide a charging method, device and electronic device, which can effectively improve the charging efficiency of the battery at a higher energy density and reduce the charging time.

[0004] The technical solution of the embodiment of the present application is implemented as follows: In a first aspect, an embodiment of the present application provides a charging method, the method comprising: Obtaining the state of charge of the battery to be charged during the charging process; In response to the state of charge reaching a first state of charge, performing a staged charging process on the battery to be charged based on a first charging rate and a preset charge threshold value, so that the state of charge of the battery to be charged reaches a second state of charge; wherein the first state of charge is less than the second state of charge; Performing staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold value, so that the state of charge of the battery to be charged is fully charged; The staged charging process represents a charging process in which the charge state increment of the battery to be charged in each charging stage meets a preset charge threshold; the preset charge threshold is smaller than the difference between the fully charged charge state and the first charge state.

[0005] In this embodiment, when charging the battery to be charged, the charging device can obtain the charge state of the battery to be charged in real time during the charging process, so that when the charge state reaches the first charge state, the first charging rate and the preset charge threshold are first used to perform stage-by-stage charging on the battery to be charged from the first charge state to the second charge state, and then the second charging rate and the preset charge threshold are used to perform stage-by-stage charging on the battery to be charged from the second charge state to a full charge. Different from the charging process from the first charge state to the second charge state, as it is getting closer to the full charge state, the charging device can use a second charging rate different from the first charging rate to perform multi-stage charging on the battery to be charged until the battery to be charged is fully charged; Assume that the charging threshold is less than the difference between the fully charged state of charge and the first state of charge. Therefore, in the charging process from the first state of charge to the second state of charge and from the second state of charge to the fully charged state executed according to the preset charging threshold, the staged charging process can be performed multiple times until the battery to be charged is charged from the first state of charge to the fully charged state; thereby, corresponding charging operations can be adopted for the two charging processes from the first state of charge to the second state of charge and from the second state of charge to the fully charged state, respectively, to reduce the risk of lithium plating; based on the above-mentioned staged charging method, the accumulation of polarization caused by the high state of charge in the charging process of the battery to be charged gradually approaching the fully charged state can be effectively reduced, and the occurrence of lithium plating can be prevented, thereby effectively reducing the time it takes to charge the battery to be charged to the fully charged state and improving the charging efficiency.

[0006] In some embodiments of the present application, the preset charge threshold includes a first charge threshold; and performing a staged charging process on the battery to be charged based on the first charge rate and the preset charge threshold so that the state of charge of the battery to be charged reaches a second state of charge, including: When the battery to be charged is charged at a first charging rate and the charge state increment of the battery to be charged reaches a first charge threshold, the battery to be charged is allowed to stand still; When the resting time reaches the first time, the stage charging process of charging at the first charging rate and resting for the first time is repeatedly executed until the state of charge of the battery to be charged reaches the second state of charge.

[0007] In an embodiment of the present application, when the charging device charges a battery to be charged that has reached a first state of charge to a second state of charge, the charging device may first charge the battery to be charged at a first charging rate to a state of charge increment that meets a first charge threshold, then suspend charging, start to stand still, and maintain for a first time period, and then continue to charge the battery to be charged at the first charging rate to a state of charge increment that meets the first charge threshold, and then stand still for the first time period, and repeat the above-mentioned staged charging process multiple times until the state of charge of the battery to be charged reaches the second state of charge, which can eliminate the polarization of the battery to be charged during the charging process from the first state of charge to the second state of charge, reduce the charging time of the battery to be charged from the first state of charge to the second state of charge, and improve the charging efficiency of the battery to be charged from the first state of charge to the second state of charge.

[0008] In some embodiments of the present application, the preset charge threshold includes a second charge threshold and a third charge threshold; performing a staged charging process on the battery to be charged based on the first charging rate and the preset charge threshold so that the charge state of the battery to be charged reaches the second charge state, including: When the battery to be charged is charged at a first charging rate and the charge state increment of the battery to be charged reaches a second charge threshold, the battery to be charged is left to stand; When the static time reaches the second time, discharging the battery to be charged; When the state of charge of the battery to be charged decreases to a third charge threshold, repeatedly performing a stage charging process of charging at a first charge rate, standing for a second time, and discharging the battery to be charged, until the state of charge of the battery to be charged reaches a second state of charge; The difference between the second charge threshold and the third charge threshold is equal to the first charge threshold.

[0009] In an embodiment of the present application, when the charging device charges the battery to be charged that has reached a first state of charge to a second state of charge, the charging device may also first charge the battery to be charged to a state of charge increment that meets a second charge threshold value according to a first charging rate, and then discharge the battery to be charged, with the discharged amount being the second charge threshold value, and then suspend the charging and discharging process. After the battery to be charged has been left to rest for a second period of time, the above-mentioned stage charging process is repeated until the state of charge of the battery to be charged is charged to the second state of charge, thereby effectively eliminating polarization when charging from the first state of charge to the second state of charge, and improving the charging efficiency of the battery to be charged from the first state of charge to the second state of charge.

[0010] In some embodiments of the present application, performing a staged charging process on the battery to be charged based on the first charging rate and the preset charge threshold so that the state of charge of the battery to be charged reaches a second state of charge includes: When the battery to be charged is charged at a first charging rate and the charge state increment of the battery to be charged reaches a second charge threshold, discharging the battery to be charged; When the charge state of the discharged battery to be charged decreases to reach a third charge threshold, placing the battery to be charged at rest; When the standing time reaches the second time, the stage charging process of charging at the first charging rate, discharging the battery to be charged and standing for the second time is repeated until the charge state of the battery to be charged reaches the second charge state.

[0011] In this embodiment, when the charging device charges the battery to be charged that has reached the first state of charge to the second state of charge, it can also first charge the battery to be charged according to the first charging rate, and when the amount of electricity to reach the second charge threshold is charged, the battery to be charged is discharged, and the discharged amount is the third charge threshold, and then the battery is left to rest for a second period of time, and the above-mentioned stage charging process is repeated until it is charged to the second state of charge, thereby eliminating polarization from the first state of charge to the second state of charge, reducing the risk of lithium plating, and thus reducing the charging time of the battery to be charged from the first state of charge to the second state of charge.

[0012] In some embodiments of the present application, the second charging rate includes a plurality of sub-charging rates; and performing a staged charging process on the battery to be charged based on the second charging rate and a preset charge threshold value so that the state of charge of the battery to be charged is fully charged, including: The battery to be charged is charged multiple times at different sub-charging rates to make the charge state increment reach a first charge threshold, and the charging process is left to stand for a first time until the charge state of the battery to be charged is fully charged.

[0013] In the present embodiment, the charging device can perform multiple stage charging processes at different sub-charging rates during the process of charging the battery to be charged from the second state of charge to a full charge. Each stage charging process includes charging the battery to be charged to a first charge threshold at a certain sub-charging rate and then leaving it to stand for a first period of time. The sub-charging rates in different stage charging processes are different. Charging the battery to be charged from the second state of charge to a full charge based on the above method can eliminate polarization during charging from the second state of charge to a full charge, reduce the risk of lithium plating, and thus reduce the charging time for charging the battery to be charged from the second state of charge to a full charge.

[0014] In some embodiments of the present application, performing staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold value so that the state of charge of the battery to be charged is fully charged includes: The charging process includes charging the battery to be charged multiple times at different sub-charging rates to increase the state of charge to a second charge threshold, leaving the battery to be charged for a second period of time, and discharging the battery to be charged to decrease the state of charge to a third charge threshold until the state of charge of the battery to be charged is fully charged.

[0015] In the present embodiment, the charging device may further perform multiple stage charging processes at different sub-charging rates during the process of charging the battery to be charged from the second state of charge to a full charge. Each stage charging process includes charging the battery to be charged to a second charge threshold value at a certain sub-charging rate, then leaving it to rest for a second period of time, and then discharging the battery to a third charge threshold value. The sub-charging rates in different stage charging processes are different. Charging the battery to be charged from the second state of charge to a full charge based on the above method can eliminate polarization during charging from the second state of charge to a full charge, reduce the risk of lithium plating, and thus reduce the charging time for charging the battery to be charged from the second state of charge to a full charge.

[0016] In some embodiments of the present application, performing staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold value so that the state of charge of the battery to be charged is fully charged includes: The charging process includes charging the battery to be charged multiple times at different sub-charging rates to increase the state of charge to a second charge threshold, discharging the battery to be charged to decrease the state of charge to a third charge threshold, and standing for a second period of time until the state of charge of the battery to be charged is fully charged.

[0017] In an embodiment of the present application, the charging device can also perform multiple stage charging processes with different sub-charging rates during the process of charging the battery to be charged from the second state of charge to a full charge. Each stage charging process includes charging the battery to be charged to a second charge threshold value at a certain sub-charging rate, then charging the battery to be charged to the second charge threshold value, and then leaving it to stand for a second period of time. The sub-charging rates in different stage charging processes are different. Charging the battery to be charged from the second state of charge to a full charge based on the above method can eliminate polarization from the second state of charge to a full charge, reduce the risk of lithium plating, and thus reduce the charging time for charging the battery to be charged from the second state of charge to a full charge.

[0018] In a second aspect, an embodiment of the present application provides a charging device, including an acquisition unit and a charging unit; An acquisition unit, used for acquiring the state of charge of the battery to be charged during the charging process; A charging unit, configured to, in response to the state of charge reaching a first state of charge, perform a staged charging process on the battery to be charged based on a first charging ratio and a preset charge threshold value, so that the state of charge of the battery to be charged reaches a second state of charge; wherein the first state of charge is less than the second state of charge; and perform a staged charging process on the battery to be charged based on the second charging ratio and the preset charge threshold value, so that the state of charge of the battery to be charged is fully charged; The staged charging process represents a charging process in which the charge state increment of the battery to be charged in each charging stage meets a preset charge threshold; the preset charge threshold is smaller than the difference between the fully charged charge state and the first charge state.

[0019] In this embodiment, when charging the battery to be charged, the charging device first uses the first charging rate and the preset charge threshold to perform stage-by-stage charging on the battery to be charged, charging the battery to be charged from the first state of charge to the second state of charge, and then uses the second charging rate and the preset charge threshold to perform stage-by-stage charging on the battery to be charged, charging the battery to be charged from the second state of charge to a full charge. Different from the charging process from the first state of charge to the second state of charge, as the battery is getting closer to the full charge state, the charging device can use the second charging rate different from the first charging rate to perform multi-stage charging on the battery to be charged, until the battery to be charged is fully charged; since the preset charge threshold is less than the state of charge between the full charge and the first charge state, the charging device can use the second charging rate different from the first charging rate to perform multi-stage charging on the battery to be charged, until the battery to be charged is fully charged. The difference in state, therefore, in the charging process from the first state of charge to the second state of charge and from the second state of charge to full charge executed according to the preset charge threshold, the staged charging process can be executed multiple times until the battery to be charged is charged from the first state of charge to full charge; thereby, the two charging processes from the first state of charge to the second state of charge and from the second state of charge to full charge can be respectively adapted to adopt appropriate charging operations to reduce the risk of lithium plating; based on the above-mentioned staged charging method, the accumulation of polarization caused by the high state of charge in the charging process of the battery to be charged gradually approaching the full charge state can be effectively reduced, and the occurrence of lithium plating can be prevented, thereby effectively reducing the time it takes to charge the battery to be charged to full charge and improving the charging efficiency.

[0020] In a third aspect, an embodiment of the present application provides an electronic device, including a battery, a memory and a processor, wherein the memory is used to store a computer program, and when the battery is charged, the computer program is executed by the processor to implement the above-mentioned charging method.

[0021] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned charging method is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below.The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application.

[0023] Figure 1 A schematic diagram of the implementation flow of the charging method proposed in the embodiment of the present application; Figure 2 A schematic diagram of the structure of the charging device proposed in the embodiment of the present application; Figure 3 A schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. It is understood that the specific embodiments described herein are only used to explain the related applications, rather than to limit the applications. It should also be noted that, for ease of description, only the parts related to the related applications are shown in the accompanying drawings.

[0025] New energy batteries are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are increasingly used in energy storage, etc. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0026] At present, in the high-pressure dense system such as lithium iron phosphate (LFP), such as powder compaction density = 2.7 g / cm 3 When charging a battery, the general charging time is long. For example, in an environment of 25 degrees Celsius, the time to charge from 0% SOC to 100% SOC is more than one hour. This is because when the battery has a high energy density, such as when the power is greater than or equal to 80% SOC, the cumulative constant current charging plan will be accelerated, the anode point will decrease more, and high-rate charging will easily lead to lithium plating, so the charging rate needs to be reduced, which will extend the overall charging time.

[0027] In the related art, in order to achieve the purpose of depolarization, polarization is mainly eliminated by standing still for a long time, which will greatly prolong the charging time; or a supercharge chemical system is used to improve the dynamics of the battery at a high SOC greater than or equal to 80% SOC, but this will cause the first efficiency, energy density, cycle life, etc. to decrease; there is also the method of improving the dynamics by reducing the coating weight of the electrode or the compaction density of the powder, but this will cause the problem of low energy density of the battery.

[0028] In order to solve the problems existing in current battery charging, the embodiments of the present application provide a charging method, device and electronic device; the charging device can obtain the state of charge of the battery to be charged during the charging process; in response to the state of charge reaching the first state of charge, the battery to be charged is subjected to staged charging processing based on the first charging ratio and the preset charge threshold, so that the state of charge of the battery to be charged reaches the second state of charge; wherein the first state of charge is less than the second state of charge; the battery to be charged is subjected to staged charging processing based on the second charging ratio and the preset charge threshold, so that the state of charge of the battery to be charged is fully charged; wherein the staged charging processing represents the charging processing in which the increment of the state of charge of the battery to be charged in each charging stage meets the preset charge threshold; the preset charge threshold is less than the difference between the fully charged state of charge and the first state of charge. Based on the above scheme, the charging efficiency of the battery at high energy density can be effectively improved and the charging time can be reduced.

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0030] An embodiment of the present application provides a charging method, such as Figure 1 As shown, the charging method of the charging device may include the following steps: Step 101: Obtain the state of charge of the battery to be charged during the charging process.

[0031] In an embodiment of the present application, the charging device can obtain the charge state of the battery to be charged during the charging process.

[0032] In the embodiments of the present application, the battery to be charged may be assembled from one or more battery cells; the battery may be a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy, and can be used to make a battery module or a battery pack, so as to supply power to an electrical device. A battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the embodiments of the present application.

[0033] In the embodiment of the present application, the battery may also be a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar component.

[0034] In some embodiments of the present application, the battery to be charged may be a lithium iron phosphate battery with a high-pressure sealing system.

[0035] In the embodiment of the present application, the charging device represents a power conversion device that can convert alternating current into direct current and provide the required charging current and voltage for the battery.

[0036] For example, the charging device can obtain the state of charge of the battery to be charged in real time during the process of charging the battery to be charged. For example, at time t1, the state of charge of the battery to be charged is 30% SOC, and at time t2, the state of charge of the battery to be charged is 46% SOC.

[0037] In an embodiment of the present application, after obtaining the state of charge of the battery to be charged during the charging process, the charging device can, in response to the state of charge reaching a first state of charge, perform a staged charging process on the battery to be charged based on a preset charging rate and a preset charge threshold value, so that the state of charge of the battery to be charged is fully charged; wherein the staged charging process represents a charging process in which the increment of the state of charge of the battery to be charged in each charging stage meets the preset charge threshold value; the preset charge threshold value is less than the difference between the fully charged state of charge and the first state of charge.

[0038] In some embodiments of the present application, the first state of charge may be 80% SOC.

[0039] In some embodiments of the present application, the specific value of the preset charging rate is not limited in the present application; and the preset charging rate may include multiple different charging rates; the preset charging rate may be determined based on the rated capacity of the battery to be charged.

[0040] In some embodiments of the present application, the specific value of the preset charging threshold is not limited in the present application.

[0041] In some embodiments of the present application, since the preset charge threshold is less than the difference between the fully charged state of charge and the first state of charge, and the staged charging process represents a charging process in which the charge state increment of the battery to be charged in each charging stage meets the preset charge threshold, the staged charging process may include multiple charging stages, and each charging stage may be executed based on a preset charging rate and a preset charge threshold.

[0042] Exemplarily, the preset charge threshold is 2.5% SOC, the first state of charge is 80% SOC, the fully charged state of charge is 100% SOC, and the preset charge threshold is less than the difference between the fully charged state of charge and the first state of charge; in the staged charging process, each charging stage can be performed with the state of charge increment of the battery to be charged meeting 2.5% SOC, then in the process of charging the battery to be charged from 80% SOC to fully charged, 8 charging stages can be included.

[0043] In some embodiments of the present application, the preset charging rate may include a first charging rate and a second charging rate; after the charging device obtains the charge state of the battery to be charged during the charging process, that is, after step 101, the charging device may include the following steps: Step 102: in response to the state of charge reaching a first state of charge, performing staged charging processing on the battery to be charged based on a first charging rate and a preset charge threshold value, so that the state of charge of the battery to be charged reaches a second state of charge; wherein the first state of charge is less than the second state of charge.

[0044] In an embodiment of the present application, after obtaining the charge state of the battery to be charged during the charging process, the charging device can, in response to the charge state reaching a first charge state, perform staged charging processing on the battery to be charged based on a first charging rate and a preset charge threshold value, so that the charge state of the battery to be charged reaches a second charge state; wherein the first charge state is less than the second charge state.

[0045] In the embodiments of the present application, the first charging rate represents the charging rate of charging the rechargeable battery from a first state of charge to a second state of charge; the specific value of the first charging rate is not limited in the present application.

[0046] In some embodiments of the present application, the second state of charge may be 90% SOC.

[0047] In some embodiments of the present application, the first charging rate may be 2C, where C represents the rated capacity of the battery to be charged.

[0048] Exemplarily, when the battery to be charged reaches 80% SOC, the charging device may perform a staged charging process on the battery to be charged according to a charging rate of 2C and a preset charge threshold of 2.5% SOC, until the battery to be charged reaches 90% SOC.

[0049] In some embodiments of the present application, the preset charge threshold may include a first charge threshold, a second charge threshold, and a third charge threshold; wherein the difference between the second charge threshold and the third charge threshold is equal to the first charge threshold.

[0050] In some embodiments of the present application, the first charge threshold is 2.5% SOC, the second charge threshold is 3% SOC, and the third charge threshold is 0.5% SOC.

[0051] In some embodiments of the present application, when the charging device performs staged charging on the battery to be charged based on a first charging rate and a preset charge threshold so that the charge state of the battery to be charged reaches a second charge state, the battery to be charged can be charged at the first charging rate and the charge state increment of the battery to be charged reaches the first charge threshold, and then the battery to be charged can be left to stand; and then, when the standing time reaches a first time, the staged charging process of charging at the first charging rate and standing for the first time is repeated until the charge state of the battery to be charged reaches the second charge state.

[0052] In some embodiments of the present application, the first duration may be 1.5 minutes.

[0053] Exemplarily, when the state of charge of the battery to be charged reaches 80% SOC, the charging device can perform four stage charging processes. In the first stage charging process, the charging device can charge the battery to be charged at a charging rate of 2C. When 2.5% SOC is charged, that is, when the charging device monitors that the state of charge of the battery to be charged reaches 82.5% SOC, the charging of the battery to be charged is suspended and left to stand for 1.5 minutes; then the above operation is repeated again to complete the second stage charging process; thus, the battery to be charged can be charged from 80% SOC to 90% SOC by executing the above stage charging process four times; in this process, the polarization of the battery to be charged during the charging process from 80% SOC to 90% SOC can be eliminated, the charging time of the battery to be charged from 80% SOC to 90% SOC can be reduced, and the charging efficiency of the battery to be charged from 80% SOC to 90% SOC can be improved.

[0054] In some embodiments of the present application, when the charging device performs staged charging processing on the battery to be charged based on the first charging rate and the preset charge threshold so that the charge state of the battery to be charged reaches the second charge state, the battery to be charged can also be placed at rest when the battery to be charged is charged at the first charging rate and the charge state increment of the battery to be charged reaches the second charge threshold; then, the battery to be charged is discharged when the standing time reaches the second time; and then, when the charge state decrement of the discharged battery to be charged reaches the third charge threshold, the staged charging process of charging at the first charging rate, placing the battery to be charged at rest for the second time, and discharging the battery to be charged is repeated until the charge state of the battery to be charged reaches the second charge state.

[0055] In some embodiments of the present application, the second duration may be 1 minute.

[0056] For example, when the state of charge of the battery to be charged reaches 80% SOC, the charging device can perform a 4-stage charging process. In the first stage charging process, the charging device can charge the battery to be charged at a charging rate of 2C. When 3% SOC is charged, that is, when the charging device detects that the state of charge of the battery to be charged reaches 83% SOC, the charging of the battery to be charged is suspended, and it is left to stand for 1 minute, and then the battery to be charged is discharged, and the discharged power is 0.5%. SOC, when the charging device detects that the state of charge of the battery to be charged is 82.5% SOC, it stops discharging, thereby completing the first stage of charging; then the charging device can continue to perform the above-mentioned stage charging process on the battery to be charged for 3 times, so that the state of charge of the battery to be charged reaches 90% SOC; based on the above-mentioned stage charging method, it is possible to eliminate the polarization of the battery to be charged during the charging process from 80% SOC to 90% SOC, reduce the charging time of the battery to be charged from 80% SOC to 90% SOC, and improve the charging efficiency of the battery to be charged from 80% SOC to 90% SOC.

[0057] In some embodiments of the present application, when the charging device performs staged charging processing on the battery to be charged based on the first charging rate and the preset charge threshold so that the charge state of the battery to be charged reaches the second charge state, the charging device can also charge the battery to be charged at the first charging rate and discharge the battery to be charged when the charge state increment of the battery to be charged reaches the second charge threshold; then, when the charge state decrement of the discharged battery to be charged reaches the third charge threshold, the battery to be charged is allowed to stand; and then, when the standing time reaches the second time, the staged charging process of charging at the first charging rate, discharging the battery to be charged and standing for the second time is repeated until the charge state of the battery to be charged reaches the second charge state.

[0058] For example, when the state of charge of the battery to be charged reaches 80% SOC, the charging device can perform a four-stage charging process. In the first stage charging process, the charging device can charge the battery to be charged at a charging rate of 2C. When 3% SOC is charged, that is, when the charging device detects that the state of charge of the battery to be charged reaches 83% SOC, the charging of the battery to be charged is suspended and the battery to be charged is discharged. The discharged power is 0.5%. SOC, when the charging device detects that the state of charge of the battery to be charged is 82.5% SOC, it stops discharging and stands for 1 minute, thereby completing the first stage of charging; then the charging device can continue to perform the above-mentioned stage charging process on the battery to be charged for 3 times, so that the state of charge of the battery to be charged reaches 90% SOC; based on the above-mentioned stage charging method, the polarization of the battery to be charged during the charging process from 80% SOC to 90% SOC can be eliminated, the charging time of the battery to be charged from 80% SOC to 90% SOC can be reduced, and the charging efficiency of the battery to be charged from 80% SOC to 90% SOC can be improved.

[0059] Step 103, based on the second charging rate and the preset charge threshold, the battery to be charged is charged in stages so that the state of charge of the battery to be charged is fully charged; wherein the staged charging process represents a charging process in which the state of charge increment of the battery to be charged in each charging stage meets the preset charge threshold; the preset charge threshold is less than the difference between the fully charged state of charge and the first state of charge.

[0060] In an embodiment of the present application, in response to the state of charge reaching a first state of charge, the charging device performs staged charging processing on the battery to be charged based on a first charging rate and a preset charge threshold so that the state of charge of the battery to be charged reaches a second state of charge. Then, the charging device can perform staged charging processing on the battery to be charged based on a second charging rate and a preset charge threshold so that the state of charge of the battery to be charged is fully charged.

[0061] In some embodiments of the present application, the second charging rate may include multiple sub-charging rates.

[0062] In some embodiments of the present application, the second charging rate may include four sub-charging rates: 1.75C, 1.5C, 1.25C, and 1C.

[0063] In the embodiment of the present application, since when the charge state of the battery to be charged reaches the second charge state, it is closer to a fully charged state than the first charging device, in order to better eliminate polarization accumulation, the charging device in the embodiment of the present application can adopt different sub-charging rates for charging in each stage of the charging process when performing the charging operation between the second charge state and the fully charged charging device, so as to fundamentally solve the problem of polarization accumulation and reduce the risk of lithium plating.

[0064] In some embodiments of the present application, when the charging device performs staged charging on the battery to be charged based on the second charging rate and the preset charge threshold so that the charge state of the battery to be charged is fully charged, the charging device can perform multiple charging of the battery to be charged at different sub-charging rates so that the charge state increment reaches the first charge threshold, and the staged charging process is left standing for a first period of time until the charge state of the battery to be charged is fully charged.

[0065] Exemplarily, when the state of charge of the battery to be charged reaches 90% SOC, the charging device can perform a four-stage charging process. In the first stage charging process, the charging device can charge the battery to be charged at a charging rate of 1.75C. When 2.5% SOC is charged, that is, when the charging device monitors that the state of charge of the battery to be charged reaches 92.5% SOC, the charging of the battery to be charged is suspended and left to stand for 1.5 minutes; then the battery to be charged at a charging rate of 1.5C. When 2.5% SOC is charged, that is, when the charging device monitors that the state of charge of the battery to be charged reaches 95% SOC, the charging of the battery to be charged is suspended and left to stand for 1.5 minutes; then the battery to be charged at a charging rate of 1.25C. When 2.5% SOC is charged, that is, when the charging device monitors that the state of charge of the battery to be charged reaches 97.5% SOC, the charging of the battery to be charged is suspended and left to stand for 1.5 minutes; finally, the charging rate of 1 The battery to be charged is charged at a charging rate of C. When 2.5% SOC is charged, that is, when the charging device monitors that the state of charge of the battery to be charged has reached 100% SOC, the charging of the battery to be charged is suspended and left to stand for 1.5 minutes. Thus, the above-mentioned charging process is completed four times to charge the battery to be charged from 90% SOC to 100% SOC. In this process, the polarization of the battery to be charged during the charging process from 90% SOC to 100% SOC can be eliminated, the charging time of the battery to be charged from 90% SOC to 100% SOC can be reduced, and the charging efficiency of the battery to be charged from 90% SOC to 100% SOC can be improved.

[0066] In some embodiments of the present application, when the charging device performs staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold so that the charge state of the battery to be charged is fully charged, the charging device can also perform a plurality of stage charging processes of charging the battery to be charged at different sub-charging rates to make the charge state increment reach the second charge threshold, standing for a second time period, and discharging the battery to be charged to make the charge state decrease to reach a third charge threshold, until the charge state of the battery to be charged is fully charged.

[0067] Exemplarily, when the state of charge of the battery to be charged reaches 90% SOC, the charging device can perform a four-stage charging process. In the first stage charging process, the charging device can charge the battery to be charged at a charging rate of 1.75C. When 3% SOC is charged, that is, when the charging device detects that the state of charge of the battery to be charged reaches 93% SOC, the charging of the battery to be charged is suspended, and the battery to be charged is left to stand for 1 minute. The battery to be charged is then discharged. When it is detected that the battery to be charged is discharged to a state of charge of 92.5%, the discharging is stopped; then the battery to be charged at a charging rate of 1.5C. When 3% SOC is charged, that is, when the charging device detects that the state of charge of the battery to be charged reaches 95.5% SOC, the charging of the battery to be charged is suspended, and the battery to be charged is left to stand for 1 minute. The battery to be charged is then discharged. When it is detected that the battery to be charged is discharged to a state of charge of 95%, the discharging is stopped; then the charging rates of 1.25C and 1 C's charging rate performs the above-mentioned operations of charging, standing and discharging the battery to be charged, thereby completing the 4-stage charging process to charge the battery to be charged from 90% SOC to 100% SOC; in this process, the polarization of the battery to be charged during the charging process from 90% SOC to 100% SOC can be eliminated, the charging time of the battery to be charged from 90% SOC to 100% SOC can be reduced, and the charging efficiency of the battery to be charged from 90% SOC to 100% SOC can be improved.

[0068] In some embodiments of the present application, when the charging device performs staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold so that the charge state of the battery to be charged is fully charged, the charging device can also perform a plurality of stage charging processes of charging the battery to be charged at different sub-charging rates to make the charge state increment reach the second charge threshold, discharging the battery to be charged to make the charge state decrease to reach the third charge threshold, and leaving the battery to be charged for a second period of time, until the charge state of the battery to be charged is fully charged.

[0069] Exemplarily, when the state of charge of the battery to be charged reaches 90% SOC, the charging device can perform a four-stage charging process. In the first stage charging process, the charging device can charge the battery to be charged at a charging rate of 1.75C. When 3% SOC is charged, that is, when the charging device detects that the state of charge of the battery to be charged reaches 93% SOC, the charging of the battery to be charged is suspended, and the battery to be charged is discharged. When it is detected that the battery to be charged is discharged to a state of charge of 92.5%, the discharging is stopped, and the battery is left to stand for 1 minute; then the battery to be charged at a charging rate of 1.5C. When 3% SOC is charged, that is, when the charging device detects that the state of charge of the battery to be charged reaches 95.5% SOC, the charging of the battery to be charged is suspended, and the battery to be charged is discharged. When it is detected that the battery to be charged is discharged to a state of charge of 95%, the discharging is stopped, and the battery is left to stand for 1 minute; then the charging rate of 1.25C and 1 C's charging rate performs the above-mentioned operations of charging, standing and discharging the battery to be charged, thereby completing the 4-stage charging process to charge the battery to be charged from 90% SOC to 100% SOC; in this process, the polarization of the battery to be charged during the charging process from 90% SOC to 100% SOC can be eliminated, the charging time of the battery to be charged from 90% SOC to 100% SOC can be reduced, and the charging efficiency of the battery to be charged from 90% SOC to 100% SOC can be improved.

[0070] An embodiment of the present application provides a charging method, in which a charging device obtains a state of charge of a battery to be charged during a charging process; in response to the state of charge reaching a first state of charge, the battery to be charged is subjected to staged charging processing based on a preset charging rate and a preset charge threshold value, so that the state of charge of the battery to be charged is fully charged; wherein the staged charging processing represents a charging processing in which the state of charge increment of the battery to be charged in each charging stage meets the preset charge threshold value; the preset charge threshold value is less than the difference between the fully charged state of charge and the first state of charge. Thus, it can be seen that when the charging device charges the battery to be charged, it first uses the first charging rate and the preset charge threshold to perform stage-by-stage charging on the battery to be charged, charging the battery to be charged from the first state of charge to the second state of charge, and then uses the second charging rate and the preset charge threshold to perform stage-by-stage charging on the battery to be charged, charging the battery to be charged from the second state of charge to a full charge. Different from the charging process from the first state of charge to the second state of charge, as it is getting closer to the full charge state, the charging device can use the second charging rate different from the first charging rate to perform multi-stage charging on the battery to be charged, until the battery to be charged is charged to a full charge state; since the preset charge threshold is less than the full charge state and the first charge state, the charging process is different from the first charge state. state difference, therefore, in the charging process from the first state of charge to the second state of charge and from the second state of charge to full charge executed according to the preset charge threshold, the staged charging process can be executed multiple times until the battery to be charged is charged from the first state of charge to full charge; thereby, the two charging processes from the first state of charge to the second state of charge and from the second state of charge to full charge can be respectively adapted to adopt appropriate charging operations to reduce the risk of lithium plating; based on the above-mentioned staged charging method, the accumulation of polarization caused by the high state of charge in the charging process of the battery to be charged gradually approaching the full charge state can be effectively reduced, and the occurrence of lithium plating can be prevented, thereby effectively reducing the time it takes to charge the battery to be charged to full charge and improving the charging efficiency.

[0071] Based on the above embodiments, in another embodiment of the present application, an experimental method for obtaining the above charging method is provided by way of example; the greatest difficulty in improving the charging speed of the battery after 80% SOC is the rapid accumulation of polarization, which is reflected in the rapid decline of the anode potential. When the anode potential drops below 0V, lithium precipitation will occur. Polarization is mainly divided into ohmic polarization, electrochemical polarization and concentration polarization. In order to further analyze the polarization types that accumulate rapidly during the charging process, it can be found that when charging is stopped, that is, no current is applied to the battery cell, the anode potential curve rises rapidly, and then gradually stabilizes; when the charging rate is reduced, the anode potential also rises. From these two aspects, it can be seen that electrochemical polarization and ohmic polarization respond to current the fastest; the embodiment of the present application obtains a staged charging process through actual measurement, which can effectively reduce the accumulation of polarization, protect the anode, and prevent lithium precipitation.

[0072] For example, at 25°C, the charge rate that will not cause lithium deposition can be determined by a pulse window test; the battery can be charged to 3.65 V at a current of 0.33 C, 3.65 V being the full charge voltage of the battery; constant voltage charging is then performed to make the charging current less than 0.05 C, and after standing for 30 min, the battery is discharged to 2.5 V at a current of 0.33 C, and after standing for 5 min, the battery is discharged to 2.0 V at 0.1 C to obtain the capacity C0 of the battery; then copper wire is plated with lithium as a reference electrode, and the function of the reference electrode is to obtain the potential difference between the positive and negative electrodes of the battery, so as to judge the lithium deposition of the battery and optimize the charging strategy; then the pulse window test can be started, the battery is charged to 3.65 V at a current of 0.33 C0, and then the battery is charged to a current less than 0.05 C0 at a constant voltage of 3.65 V, and after standing for 10 min, the battery is discharged to a capacity of 0.2 C0 at a current of 0.33 C0, and the battery is adjusted to 80% SOC, and the battery is stood for 30 min. min later, the batteries were charged at 0.8 C0, 1.2 C0, and 1.6 C0 for 30 s, and the obtained charging capacities were recorded as X1, X2, and X3, respectively. After standing for 10 min, the capacities of X1, X2, and X3 were discharged at a current of 0.05 C0, respectively. Subsequently, the pulse windows at 70% SOC, 50% SOC, and 20% SOC were tested in the same way, that is, the batteries were adjusted to 70% SOC, 50% SOC, and 20% SOC, respectively, and then the above tests were performed to obtain the respective matching charging rates, for example, the charging rates at 70% SOC were 1.15 C0, 1.85 C0, and 2.55 C0, the charging rates at 50% SOC were 1.5 C0, 2.5 C0, and 3.5 C0, and the charging rates at 20% SOC were 2C0, 3 C0, and 4 C0; wherein the charging cutoff conditions all included a -10 mV cutoff.

[0073] For example, in order to explore the optimal charging rate and rest time, a pulse system test can be performed; similarly, the battery can be charged to 3.65 V at a current of 0.33 C, and then charged at a constant voltage of 3.65 V until the current is less than 0.05 C. After standing for 30 min, discharge to 2.5 V with a current of 0.33 C. After standing for 5 min, discharge to 2.0 V with a current of 0.1 C to obtain the capacity C0 of the battery. Then, copper wire is plated with lithium as a reference electrode. Then, pulse system anode point monitoring is started to explore the best staged charging strategy. For example, the charging effects of pulse tests with a charging interval of 2.5% SOC and pulse tests with an interval of 5% SOC are tested respectively. For the pulse test with an interval of 2.5% SOC, it can be discharged to 2 V at a current of 0.33 C0 at 25°C. After standing for 5 min, charge to 2.5% SOC with a current of 0.5 C0 and stand for 30 min. This cycle is repeated 40 times. Subsequently, 2.5% SOC is charged with currents of 1C0, 1.5 C0, 2 C0, 2.5 C0, 3 C0 and 5 C0 in sequence. For the pulse test with an interval of 5% SOC, it can be discharged to 2 V at a current of 0.33 C0 at 25°C. After standing for 5 min, charge to 2.5% SOC with a current of 0.5 C0 and stand for 30 min. This cycle is repeated 40 times. Subsequently, 2.5% SOC is charged with currents of 1C0, 1.5 C0, 2 C0, 2.5 C0, 3 C0 and 5 C0 in sequence. The battery was discharged with a current of C0 to 2 V, and after standing for 5 min, it was charged with a current of 0.5 C0 to 5% SOC, and stood for 30 min. This cycle was repeated 20 times. Subsequently, the battery was charged with a current of 1 C0, 1.5 C0, 2 C0, 2.5 C0, 3 C0, and 5 C0 to 5% SOC. The test showed that the charging efficiency of the pulse test with an interval of 2.5% SOC was the best.

[0074] In the embodiments of the present application, after the above-mentioned tests to explore the charging strategy, the embodiments of the present application obtained a charging strategy that can solve the problem of polarization accumulation during charging of batteries of high-voltage and dense systems such as lithium iron phosphate at high SOC, i.e., greater than or equal to 80% SOC, and can significantly reduce the charging time.

[0075] In some embodiments of the present application, in order to optimize the charging time of high-voltage and dense system batteries such as lithium iron phosphate batteries during the charging process of SOC greater than or equal to 80% and reduce the risk of lithium plating, the embodiments of the present application provide a pulse charging strategy, which mainly includes three staged charging treatment methods, which can effectively improve the charging efficiency of lithium iron phosphate batteries and reduce the charging time.

[0076] In some embodiments of the present application, for the first stage charging process, when the state of charge of the lithium iron phosphate battery to be charged reaches 80% SOC, the charging device can constantly charge the lithium iron phosphate battery at a charging rate of 2C by 2.5% SOC, and then stand still for 1.5 minutes as a stage. Repeat this 4 times to charge to 90% SOC, and then perform 4 charging stages at the charging rates of 1.75C, 1.5C, 1.25C, and 1C respectively to make the state of charge reach 100% SOC. Among them, in each stage, it constantly charges by 2.5% SOC at the corresponding charging rate, and then stands still for 1.5 minutes; through actual measurement, the charging duration required from 80% SOC to 100% SOC is 19.56 minutes. Compared with the charging duration of 27.42 minutes for conventional constant current charging, the charging time is shortened by 28.67%.

[0077] In some embodiments of the present application, for the second stage charging process, when the state of charge of the lithium iron phosphate battery to be charged reaches 80% SOC, the charging device can constantly charge the lithium iron phosphate battery at a charging rate of 2C by 3% SOC, then stand still for 1 minute, and then constantly discharge by 0.5% SOC as a stage. Repeat this 4 times to charge to 90% SOC; then perform 4 charging stages at the charging rates of 1.75C, 1.5C, 1.25C, and 1C respectively to make the state of charge reach 100% SOC. Among them, in each stage, it constantly charges by 3% SOC at the corresponding charging rate, then stands still for 1 minute, and then constantly discharges by 0.5% SOC; through actual measurement, the charging duration required from 80% SOC to 100% SOC is 19.35 minutes. Compared with the charging duration of 27.42 minutes for conventional constant current charging, the charging time is shortened by 29.43%.

[0078] In some embodiments of the present application, for the third stage charging process, when the state of charge of the lithium iron phosphate battery to be charged reaches 80% SOC, the charging device can constantly charge the lithium iron phosphate battery at a charging rate of 2C by 3% SOC, then constantly discharge by 0.5% SOC, and then stand still for 1 minute as a stage. Repeat this 4 times to charge to 90% SOC; then perform 4 charging stages at the charging rates of 1.75C, 1.5C, 1.25C, and 1C respectively to make the state of charge reach 100% SOC. Among them, in each stage, it constantly charges by 3% SOC at the corresponding charging rate, then constantly discharges by 0.5% SOC, and then stands still for 1 minute; through actual measurement, the charging duration required from 80% SOC to 100% SOC is 19.35 minutes. Compared with the charging duration of 27.42 minutes for conventional constant current charging, the charging time is shortened by 29.43%.

[0079] To summarize, the embodiments of the present application perform constant current charging and standing at a preset charging rate, or constant current charging, standing and discharging, or constant current charging, discharging and standing in three charging modes, and each charging mode is completed by executing multiple charging stages with the purpose of increasing the state of charge by 2.5% SOC; through the above-mentioned staged charging method, the concentration polarization, electrochemical plan and ohmic plan caused by the charging process can be eliminated, the purpose of fast charging can be achieved, and it is beneficial to reduce the risk of lithium plating and extend the life of the battery cell.

[0080] An embodiment of the present application provides a charging method, in which a charging device obtains a state of charge of a battery to be charged during a charging process; in response to the state of charge reaching a first state of charge, the battery to be charged is subjected to staged charging processing based on a preset charging rate and a preset charge threshold value, so that the state of charge of the battery to be charged is fully charged; wherein the staged charging processing represents a charging processing in which the state of charge increment of the battery to be charged in each charging stage meets the preset charge threshold value; the preset charge threshold value is less than the difference between the fully charged state of charge and the first state of charge. Thus, it can be seen that when the charging device charges the battery to be charged, it first uses the first charging rate and the preset charge threshold to perform stage-by-stage charging on the battery to be charged, charging the battery to be charged from the first state of charge to the second state of charge, and then uses the second charging rate and the preset charge threshold to perform stage-by-stage charging on the battery to be charged, charging the battery to be charged from the second state of charge to a full charge. Different from the charging process from the first state of charge to the second state of charge, as it is getting closer to the full charge state, the charging device can use the second charging rate different from the first charging rate to perform multi-stage charging on the battery to be charged, until the battery to be charged is charged to a full charge state; since the preset charge threshold is less than the full charge state and the first charge state, the charging process is different from the first charge state. state difference, therefore, in the charging process from the first state of charge to the second state of charge and from the second state of charge to full charge executed according to the preset charge threshold, the staged charging process can be executed multiple times until the battery to be charged is charged from the first state of charge to full charge; thereby, the two charging processes from the first state of charge to the second state of charge and from the second state of charge to full charge can be respectively adapted to adopt appropriate charging operations to reduce the risk of lithium plating; based on the above-mentioned staged charging method, the accumulation of polarization caused by the high state of charge in the charging process of the battery to be charged gradually approaching the full charge state can be effectively reduced, and the occurrence of lithium plating can be prevented, thereby effectively reducing the time it takes to charge the battery to be charged to full charge and improving the charging efficiency.

[0081] Based on the above embodiment, in another embodiment of the present application, a charging device is provided, such as Figure 2 As shown, the charging device 1 may include an acquisition unit 11 and a charging unit 12 .

[0082] The acquisition unit 11 may be used to acquire the state of charge of the battery to be charged during the charging process.

[0083] The charging unit 12 can be used to perform staged charging processing on the battery to be charged based on a first charging rate and a preset charge threshold in response to the state of charge reaching a first state of charge, so that the state of charge of the battery to be charged reaches a second state of charge; wherein the first state of charge is less than the second state of charge; and perform staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold, so that the state of charge of the battery to be charged is fully charged; wherein the staged charging processing represents a charging processing in which the state of charge increment of the battery to be charged in each charging stage meets the preset charge threshold; the preset charge threshold is less than the difference between the fully charged state of charge and the first state of charge.

[0084] In some embodiments of the present application, the preset charge threshold includes a first charge threshold; the charging unit 12 can also be used to charge the battery to be charged at a first charging rate and, when the charge state increment of the battery to be charged reaches the first charge threshold, place the battery to be charged at rest; and when the standing time reaches a first time, repeat the stage charging process of charging at the first charging rate and standing for the first time until the charge state of the battery to be charged reaches a second charge state.

[0085] In some embodiments of the present application, the preset charge threshold includes a second charge threshold and a third charge threshold; the charging unit 12 can also be used to charge the battery to be charged at a first charging rate and, when the charge state increment of the battery to be charged reaches a second charge threshold, place the battery to be charged at rest; and, when the standing time reaches a second time, discharge the battery to be charged; and, when the charge state decrement of the discharged battery to be charged reaches a third charge threshold, repeat the staged charging process of charging at the first charging rate, placing the battery to be charged at rest for a second time, and discharging the battery to be charged, until the charge state of the battery to be charged reaches the second charge state.

[0086] In some embodiments of the present application, the charging unit 12 can also be used to charge the battery to be charged at a first charging rate and discharge the battery to be charged when the charge state increment of the battery to be charged reaches a second charge threshold; and to place the battery to be charged at rest when the charge state decrement of the discharged battery to be charged reaches a third charge threshold; and to repeat the staged charging process of charging at the first charging rate, discharging the battery to be charged and placing the battery to be charged at rest for a second time when the time of rest reaches a second time, until the charge state of the battery to be charged reaches the second charge state.

[0087] In some embodiments of the present application, the second charging rate includes multiple sub-charging rates; the charging unit 12 can also be used to perform multiple charging operations on the battery to be charged at different sub-charging rates so that the charge state increment reaches a first charge threshold, and a stage charging process of standing still for a first period of time until the charge state of the battery to be charged is fully charged.

[0088] In some embodiments of the present application, the charging unit 12 can also be used to perform a stage charging process of charging the battery to be charged multiple times at different sub-charging rates so that the charge state increment reaches a second charge threshold, standing for a second time period, and discharging the battery to be charged so that the charge state decreases to a third charge threshold, until the charge state of the battery to be charged is fully charged.

[0089] In some embodiments of the present application, the charging unit 12 can also be used to perform a stage charging process of charging the battery to be charged multiple times at different sub-charging rates so that the charge state increment reaches a second charge threshold, discharging the battery to be charged so that the charge state decreases to a third charge threshold, and standing for a second period of time until the charge state of the battery to be charged is fully charged.

[0090] In the embodiments of the present application, the electronic device is not specifically limited in the present application. For example, the electronic device may be an electrical device such as a car; Figure 3 As shown, the electronic device 2 may include a battery 21 , a memory 22 and a processor 23 .

[0091] The battery 21 at least includes one or more battery cells, wherein the battery cells are used to provide the required power capacity and voltage.

[0092] The memory 22 is used to store a computer program. When charging the battery 21, the computer program is executed by the processor 23 to implement the charging method described in any of the above embodiments.

[0093] In the embodiment of the present application, the processor 23 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor. It is understandable that for different devices, the electronic device used to implement the above-mentioned processor function may also be other, and the embodiment of the present application does not specifically limit it.

[0094] In some embodiments, the processor 23 may be a power management system for the battery 21 .

[0095] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, some or all of the steps in the above method are implemented. The computer-readable storage medium can be transient or non-transient.

[0096] An embodiment of the present application also provides a computer program, including a computer-readable code. When the computer-readable code is run in a computing device, a processor in the computing device executes some or all of the steps for implementing the above method.

[0097] The present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and when the computer program is read and executed by a computer, some or all of the steps in the above method are implemented. The computer program product can be implemented in hardware, software, or a combination thereof.

[0098] In some embodiments, the computer program product is specifically embodied as a computer storage medium. In other embodiments, the computer program product is specifically embodied as a software product, such as a software development kit (SDK) and the like.

[0099] It should be noted that in the embodiments of the present application, if the above method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly reflected in the form of a software product that contributes to the relevant technology. The software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a disk or an optical disk. In this way, the embodiments of the present application are not limited to any specific hardware, software or firmware, or any combination of hardware, software, and firmware.

[0100] It should be noted here that the description of the various embodiments above tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. The description of the above device, storage medium, computer program and computer program product embodiments is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the embodiments of the device, storage medium, computer program and computer program product of this application, please refer to the description of the method embodiment of this application for understanding.

[0101] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the serial number of each step / process mentioned above does not mean the order of execution, and the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The serial numbers of the embodiments of the present application mentioned above are for description only and do not represent the advantages and disadvantages of the embodiments.

[0102] It should be noted that, in the application, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0103] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0104] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed to multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, the functional units in the embodiments of the present application may be all integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0105] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A charging method, characterized in that: The method comprises: Obtaining the state of charge of the battery to be charged during the charging process; In response to the state of charge reaching a first state of charge, performing a staged charging process on the battery to be charged based on a first charging rate and a preset charge threshold value, so that the state of charge of the battery to be charged reaches a second state of charge; wherein the first state of charge is less than the second state of charge; Performing staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold value, so that the charge state of the battery to be charged is fully charged; The staged charging process represents a charging process in which the charge state increment of the battery to be charged meets the preset charge threshold in each charging stage; the preset charge threshold is smaller than the difference between the fully charged state of charge and the first state of charge.

2. The charging method according to claim 1, characterized in that: The preset charge threshold includes a first charge threshold; and the step of performing staged charging processing on the battery to be charged based on the first charge rate and the preset charge threshold so that the charge state of the battery to be charged reaches a second charge state includes: When the battery to be charged is charged at the first charging rate and the charge state increment of the battery to be charged reaches the first charge threshold, placing the battery to be charged at rest; When the standing time reaches the first time, the stage charging process of charging at the first charging rate and standing for the first time is repeatedly performed until the state of charge of the battery to be charged reaches the second state of charge.

3. The charging method according to claim 2, characterized in that: The preset charge threshold includes a second charge threshold and a third charge threshold; the step of performing staged charging processing on the battery to be charged based on the first charge rate and the preset charge threshold so that the charge state of the battery to be charged reaches the second charge state includes: When the battery to be charged is charged at the first charging rate and the charge state increment of the battery to be charged reaches the second charge threshold, placing the battery to be charged at rest; When the standing time reaches a second time, discharging the battery to be charged; When the state of charge of the battery to be charged decreases to reach the third charge threshold, the stage charging process of charging at the first charging rate, standing for the second time period, and discharging the battery to be charged is repeated until the state of charge of the battery to be charged reaches the second state of charge.

4. The charging method according to claim 3, characterized in that: The step of performing staged charging processing on the battery to be charged based on the first charging rate and the preset charge threshold so that the state of charge of the battery to be charged reaches a second state of charge includes: When the battery to be charged is charged at the first charging rate and the charge state increment of the battery to be charged reaches the second charge threshold, discharging the battery to be charged; When the state of charge of the discharged battery to be charged decreases to reach the third charge threshold, placing the battery to be charged at rest; When the standing time reaches a second time, the stage charging process of charging at the first charging rate, discharging the battery to be charged, and standing for the second time is repeated until the charge state of the battery to be charged reaches the second charge state.

5. The charging method according to claim 4, characterized in that: The second charging rate includes a plurality of sub-charging rates; and the step of performing staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold so that the state of charge of the battery to be charged is fully charged includes: The battery to be charged is charged multiple times at different sub-charging rates to make the charge state increment reach a first charge threshold, and a stage charging process is performed for a first period of time until the charge state of the battery to be charged is fully charged.

6. The charging method according to claim 5, characterized in that: The step of performing staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold so that the state of charge of the battery to be charged is fully charged includes: The battery to be charged is charged multiple times at different sub-charging rates to increase the state of charge to the second charge threshold, the battery is left to stand for a second time, and the battery to be charged is discharged to decrease the state of charge to the third charge threshold until the state of charge of the battery to be charged is fully charged.

7. The charging method according to claim 6, characterized in that: The step of performing staged charging processing on the battery to be charged based on the second charging rate and the preset charge threshold so that the state of charge of the battery to be charged is fully charged includes: The charging process of charging the battery to be charged multiple times at different sub-charging rates to make the charge state increment reach the second charge threshold, discharging the battery to be charged to make the charge state decrease to reach the third charge threshold, and standing for a second time period, until the charge state of the battery to be charged is fully charged.

8. A charging device, characterized in that: The charging device comprises an acquisition unit and a charging unit; The acquisition unit is used to acquire the charge state of the battery to be charged during the charging process; The charging unit is used for, in response to the state of charge reaching a first state of charge, performing a staged charging process on the battery to be charged based on a first charging rate and a preset charge threshold, so that the state of charge of the battery to be charged reaches a second state of charge; wherein the first state of charge is less than the second state of charge; and performing a staged charging process on the battery to be charged based on the second charging rate and the preset charge threshold, so that the state of charge of the battery to be charged is fully charged; The staged charging process represents a charging process in which the charge state increment of the battery to be charged meets the preset charge threshold in each charging stage; the preset charge threshold is smaller than the difference between the fully charged state of charge and the first state of charge.

9. An electronic device, characterized in that: The electronic device includes a battery, a memory and a processor, the memory is used to store a computer program, and when the battery is charged, the computer program is executed by the processor to implement the charging method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

Images