SOC value estimation method and device during charging process and electronic equipment

Abstract

The application discloses a SOC value estimation method and device in a charging process and electronic equipment. The method comprises the following steps: acquiring an input voltage value and an input current value of a charging device in a current charging process; estimating a SOC value corresponding to the input voltage value and the input current value by acquiring a first data table, and obtaining a first SOC value; acquiring an actual voltage value and / or an actual current value of a battery cell; estimating a SOC value corresponding to the actual voltage value and / or the actual current value by acquiring a second data table, and obtaining a second SOC value; and determining a current target SOC value according to the first SOC value and the second SOC value. The application can obtain a more accurate SOC value through a software algorithm, and improve the accuracy and reliability of the SOC value estimation under low-cost hardware conditions.

Description

Technical Field

[0001] This application relates to the field of battery management, and in particular to a method, apparatus and electronic device for estimating the SOC value during charging. Background Technology

[0002] Today, lithium batteries are widely used in various types of electronic devices as an important energy storage device.

[0003] For electronic devices that use lithium batteries as energy storage devices, in order to ensure that the electronic devices can work properly, it is necessary to frequently detect the SOC (State of Charge, remaining battery power) of the lithium batteries and display the power value as a percentage of the power when fully charged, so that users can know the remaining power status of the electronic devices.

[0004] In existing solutions, the State of Charge (SOC) value of a battery cell is typically estimated using methods such as the open-circuit voltage method or the current integration method. To ensure the accuracy of the estimated SOC value, a high-precision fuel gauge is needed to sample the voltage and current values ​​of the battery cell. However, this method results in higher manufacturing costs. If a lower-precision hardware solution is used, the uncertainty of the battery pack capacity will cause a large discrepancy between the full-charge capacity and the set value. This error will lead to the estimated SOC value showing 99% for too long without a smooth transition to 100%, resulting in lower accuracy and reliability of the SOC value estimation method, thus affecting normal user operation. Summary of the Invention

[0005] This application provides a method, apparatus, and electronic device for estimating the State of Charge (SOC) value during charging, which can improve the accuracy and reliability of SOC value estimation during charging.

[0006] This application provides a method for estimating the State of Charge (SOC) value during charging, applicable to electronic devices with battery cells. The method includes:

[0007] Obtain the input voltage and input current values ​​of the charging device during the current charging process;

[0008] The first SOC value is obtained by estimating the SOC value corresponding to the input voltage value and the input current value by acquiring the first data table;

[0009] Obtain the actual voltage and / or actual current value of the battery cell;

[0010] The second SOC value is obtained by estimating the SOC value corresponding to the actual voltage value and / or the actual current value obtained by acquiring the second data table;

[0011] The current target SOC value is determined based on the first SOC value and the second SOC value.

[0012] In one embodiment, the first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device.

[0013] In one embodiment, estimating the SOC value corresponding to the input voltage value and the input current value by obtaining a first data table includes:

[0014] Determine whether the input current value is greater than the preset maximum current value in the first data table;

[0015] If so, then reacquire the input current value.

[0016] In one embodiment, before acquiring the input voltage and input current values ​​of the charging device during the current charging process, the method further includes:

[0017] Determine whether the actual voltage value of the battery cell during the current charging process is greater than the preset voltage value; or

[0018] Determine whether the estimated SOC value during the current charging process is greater than the preset SOC value; or

[0019] Determine whether the current charging process has entered the CV stage.

[0020] In one embodiment, before acquiring the input voltage and input current values ​​of the charging device during the current charging process, the method further includes:

[0021] The input voltage value of the charging device is calibrated.

[0022] In one embodiment, determining the current target SOC value based on the first SOC value and the second SOC value includes:

[0023] Determine whether the first SOC value is greater than or equal to the second SOC value;

[0024] If so, then the first SOC value is taken as the current target SOC value;

[0025] If not, then the second SOC value will be used as the current target SOC value.

[0026] In one embodiment, the first data table includes at least two;

[0027] The step of estimating the SOC value corresponding to the input voltage value and the input current value by obtaining the first data table includes:

[0028] The corresponding first data table is determined based on the input voltage value.

[0029] This application also discloses a device for estimating the state of charge (SOC) during charging, the device comprising:

[0030] The first acquisition module is used to acquire the input voltage and input current values ​​of the charging device during the current charging process;

[0031] The first estimation module is used to estimate the SOC value corresponding to the input voltage value and the input current value by acquiring a first data table, and obtain the first SOC value;

[0032] The second acquisition module is used to acquire the actual voltage value and / or actual current value of the battery cell;

[0033] The second estimation module is used to estimate the SOC value corresponding to the acquired actual voltage value and / or actual current value by obtaining a second data table, thereby obtaining a second SOC value; and

[0034] The determination module is used to determine the current target SOC value based on the first SOC value and the second SOC value.

[0035] In one embodiment, the first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device.

[0036] This application also discloses an electronic device, the electronic device comprising:

[0037] Processor; and

[0038] A memory containing a computer program, wherein the processor executes the message retransmission method described above by calling the computer program stored in the memory.

[0039] As can be seen from the above, in the SOC value estimation method, apparatus, and electronic device of this application during charging, a first SOC value is estimated by collecting the input voltage and input current values ​​of the charging device and using a first data table, and a second SOC value is obtained by collecting the actual voltage and / or actual current values ​​of the battery cell. The target SOC value is then obtained using both the first and second SOC values. This application achieves a more accurate SOC value solely through software algorithms, improving the accuracy and reliability of SOC value estimation under low-cost hardware conditions. Attached Figure Description

[0040] Figure 1 This is a flowchart illustrating the implementation of the SOC value estimation method during charging provided in an embodiment of this application.

[0041] Figure 2 This is another implementation flowchart of the SOC value estimation method during charging provided in the embodiments of this application.

[0042] Figure 3 This is a functional block diagram of the SOC value estimation device during charging provided in an embodiment of this application.

[0043] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0044] The preferred embodiments of this application will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this application can be more easily understood by those skilled in the art, thereby providing a clearer definition of the scope of protection of this application.

[0045] Please refer to the diagrams, where the same component symbols represent the same components. The principles of this application are illustrated by way of example implementation in a suitable computing environment. The following description is based on the specific embodiments of this application exemplified, and should not be construed as limiting other specific embodiments not detailed herein.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] Please see Figure 1 The figure illustrates the implementation flow of the SOC value estimation method during charging provided in the embodiments of this application.

[0048] This method is applied to electronic devices that have batteries, such as smartphones, laptops, vacuum cleaners, or other electronic devices that require SOC (State of Charge) estimation.

[0049] This electronic device can sample and acquire the input voltage and current values ​​of the battery cell and the connected charging device through sampling modules, and provide them to the processing module for SOC (System on Chip) estimation. Common processing modules in the field, such as MCUs (Microcontroller Units), CPUs (Central Processing Units), or SOCs, can be used. Other chip modules with data processing capabilities, such as FPGAs, can also be used; this application does not limit the choice. Once the SOC value is obtained, it can be displayed to the user through a display, speaker, or other means; the display method is not limited.

[0050] like Figure 1 As shown, the method for estimating the SOC value during charging includes the following steps:

[0051] 101. Obtain the input voltage and input current values ​​of the charging device during the current charging process.

[0052] During the current charging process, the charging device can be a charger or similar device connected to the electronic device. The input voltage and input current values ​​can be detected by the charger's internal hardware, or the electronic device can sample the charging voltage and current to obtain the input voltage and input current values ​​of the charging device. It is understood that the method of obtaining the input voltage and input current values ​​of the charging device is not limited.

[0053] In one embodiment, in order to obtain a more accurate estimate of the SOC value, the input voltage value of the charging device can be calibrated. The specific calibration process can adopt the input voltage value calibration process commonly used in the art.

[0054] 102. Estimate the SOC value corresponding to the input voltage value and input current value by obtaining the first data table, and obtain the first SOC value.

[0055] In one embodiment, the first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device.

[0056] Specifically, for example, the first input voltage value is V1, and there are different SOC values ​​corresponding to V1. These SOC values ​​are then associated with the input current values ​​corresponding to those SOC values. This data mapping relationship can be tested beforehand using charging devices with different input voltage values ​​to obtain mapping data between the input current values ​​of different charging devices at different SOC values ​​under various input voltage values.

[0057] For example, in the first data table, the charging device can include three input voltage values: a first voltage, a second voltage, and a third voltage. The State of Charge (SOC) values ​​at the first voltage value include 99% / 98% / 97% / 96%, and the corresponding input current values ​​are 140mA / 160mA / 190mA / 210mA, respectively. That is, when the SOC value is 99%, the current input current value is 140mA. For each different input voltage value scenario, there is a corresponding data mapping relationship between the SOC value and the input current value.

[0058] Existing charging devices often have actual input voltage and current values ​​that differ from standard values, resulting in errors in the estimation of the State of Charge (SOC) value. This first data table can effectively reduce the error in estimating the SOC value using the input voltage and current values ​​of the charging device.

[0059] In one embodiment, the first data table includes at least two, and the estimation of the SOC value corresponding to the input voltage value and the input current value by obtaining the first data table may further include: determining the corresponding first data table based on the input voltage value.

[0060] Because different charging devices, or even the same charging device, may have multiple input voltage values, and sometimes there are significant differences between different input voltage values, the current input voltage value can be detected according to the settings, and the first data table with different input voltage values ​​can be called by comparing the voltage range of the current input voltage value.

[0061] For example, if the standard input voltage of the charging device is specified as 25V, 20V, and 15V, and the current input voltage of the charging device is detected to be 25.4V, then the first data table that matches the 25V specification can be called.

[0062] Understandably, by detecting the input voltage value and selecting the corresponding first data table, it is possible to adapt to a variety of different charging devices, and the estimation error of the SOC value can be reduced according to the actual situation of different charging devices.

[0063] In one embodiment, it is determined whether the input current value is greater than a preset maximum current value in the first data table; if so, the input current value is reacquired. The preset maximum current value can be obtained from actual testing, and the specific value is not limited.

[0064] If the detected input current value is greater than the corresponding maximum current value in the first data table, then that input current value will not be used. If the input current value exceeds the maximum current value, it can be considered that the sampling is inaccurate. In this case, it can be determined that the SOC value estimation has failed, and the input current value of the charging device needs to be re-acquired to ensure the accuracy of the SOC value estimation.

[0065] For example, if the first data table records a SOC value of 90% and a charging current of 300mA at 25.4V, and if the input current value is found to be >300mA, the SOC value under that input current value will not be estimated, and the input current value needs to be obtained again.

[0066] 103. Obtain the actual voltage and / or actual current value of the battery cell.

[0067] The actual voltage and / or actual current values ​​of the battery cell can be obtained through the sampling module inside the battery cell or the sampling module inside the electronic device. The specific method of obtaining the data can be determined according to the actual situation.

[0068] 104. By obtaining the second data table, estimate the SOC value corresponding to the actual voltage value and the actual current value to obtain the second SOC value.

[0069] The second data table can refer to existing OCV-SOC data tables or other SOC mapping tables in the field to obtain the mapping relationship between different SOC values ​​and different actual voltage values, actual current values, or temperature values. Based on the obtained actual voltage and / or actual current values ​​of the battery cell, and using the above parameters as a reference, the current SOC value is estimated by looking up the second data table.

[0070] 105. Determine the current target SOC value based on the first SOC value and the second SOC value.

[0071] To ensure the accuracy of the target SOC value, the two values ​​mentioned above need to be filtered to select the value that best reflects the actual SOC value for display.

[0072] For example, the target SOC value can be determined by comparing the first and second SOC values. Alternatively, the first and second SOC values ​​can be weighted, averaged, or subjected to other algorithms to make the resulting SOC value closer to the target SOC value.

[0073] By collecting the input voltage and current values ​​of the charging device, a first SOC value is estimated using a first data table. A second SOC value is obtained by collecting the actual voltage and / or current values ​​of the battery cell. The target SOC value can be obtained using the first and second SOC values. Thus, a more accurate SOC value can be obtained using only software algorithms, improving the accuracy and reliability of SOC value estimation under low-cost hardware conditions.

[0074] Please see Figure 2The figure shows another implementation flow of the SOC value estimation method during charging provided in the embodiments of this application.

[0075] like Figure 2 As shown, the method includes the following steps:

[0076] 201. Obtain the actual voltage and / or actual current value of the battery cell.

[0077] The actual voltage and current values ​​can be sampled from the battery cell using a sampling module in the electronic device's fuel gauge. The specific parameters acquired depend on the requirements. For example, when estimating the cell's SOC using the open-circuit method, the current actual voltage value of the cell needs to be collected. Alternatively, when estimating the cell's SOC using the ampere-hour integration method, the current actual current value can be collected for SOC estimation. This application does not limit the specific estimation method or the acquired cell parameters.

[0078] 202. Estimate the SOC value corresponding to the actual voltage value and / or actual current value obtained by acquiring the second data table, and obtain the second SOC value.

[0079] The second data table can refer to existing OCV-SOC data tables or other SOC mapping tables in the field to obtain the mapping relationship between different SOC values ​​and different actual voltage values, actual current values, or temperature values. Using the obtained actual voltage and / or actual current values ​​of the battery cell as a benchmark, the current SOC value is estimated by looking up the second data table.

[0080] 203. Determine whether the actual voltage value of the battery cell during the current charging process is greater than the preset voltage value.

[0081] To determine whether the actual voltage of the battery cell is greater than the preset voltage, the above method can be used to determine whether the SOC value needs to be corrected.

[0082] The preset voltage value can be set to the voltage value corresponding to when the cell is close to fully charged or when the SOC value is high. For example, when the SOC value is 90%, the corresponding cell voltage value is 4V, so the preset voltage value can be set to 4V. It is understood that the specific parameters of the preset voltage value can be determined according to the voltage value required for SOC calibration during actual charging, and this application does not impose any restrictions on this.

[0083] For example, if the first data table records that the SOC value is 90% and the charging current is 300mA at 25.4V, and if it is found that the input current value is 300mA and the voltage is >4.0V (preset voltage value), then the current capacity is estimated to be 90%, and the SOC value is fine-tuned.

[0084] During normal use, the accuracy of the cell's SOC value estimation is sufficient to meet general needs. By intervening in the SOC value algorithm only in the later stages of the charging process, the frequent switching of the SOC value estimation method during the charging process can be avoided, thereby improving the operational stability of electronic devices.

[0085] In some embodiments, in addition to determining whether the actual voltage value of the current battery cell is greater than the preset voltage value, it is also possible to determine whether the estimated SOC value during the current charging process is greater than the preset SOC value, or to determine whether the current charging process has entered the CV stage.

[0086] When the SOC value reaches a large value, or when it enters the CV stage, the charging current will continuously decrease, and the corresponding charging time will also be extended. If the traditional SOC value estimation method is used for calculation, it is easy to cause the continuous accumulation of detection errors, resulting in a large difference between the full charge capacity and the set value. This can lead to a situation where the estimated SOC value shows 99% for too long without a smooth transition to 100%.

[0087] Therefore, electronic devices can determine whether the currently estimated SOC value is greater than the preset SOC value, or whether the current charging process has entered the CV stage, and switch algorithms only when the SOC value needs to be estimated using the method of this embodiment. This can improve the operational stability of electronic devices and avoid interfering with the normally more accurate SOC value estimation operation.

[0088] 204. If so, obtain the input voltage and input current values ​​of the charging device during the current charging process.

[0089] During the current charging process, the charging device can be a charger or similar device connected to the electronic device. The input voltage and input current values ​​can be detected by the charger's internal hardware, or the electronic device can sample the charging voltage and current to obtain the input voltage and input current values ​​of the charging device. It is understood that the method of obtaining the input voltage and input current values ​​of the charging device is not limited.

[0090] If the actual voltage of the battery cell during the current charging process is not greater than the preset voltage value, the SOC value estimation and calibration process will be terminated. Alternatively, other methods can be used, such as continuing to use the open-circuit voltage method or the ampere-hour integration method to calculate the SOC value, or continuing to calibrate the SOC value using other calibration methods.

[0091] 205. Estimate the SOC value corresponding to the input voltage value and input current value by obtaining the first data table, and obtain the first SOC value.

[0092] In one embodiment, the first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device.

[0093] Specifically, for example, the first input voltage value is V1, and there are different SOC values ​​corresponding to V1. These SOC values ​​are then associated with the input current values ​​corresponding to those SOC values. This data mapping relationship can be tested beforehand using charging devices with different input voltage values ​​to obtain mapping data between the input current values ​​of different charging devices at different SOC values ​​under various input voltage values.

[0094] In one embodiment, the first data table includes at least two, and the estimation of the SOC value corresponding to the input voltage value and the input current value by obtaining the first data table may further include: determining the corresponding first data table based on the input voltage value.

[0095] Understandably, by detecting the input voltage value and selecting the corresponding first data table, it is possible to adapt to a variety of different charging devices, and the estimation error of the SOC value can be reduced according to the actual situation of different charging devices.

[0096] 206. Determine whether the first SOC value is greater than or equal to the second SOC value.

[0097] 207. If the first SOC value is greater than the second SOC value, the first SOC value shall be used as the current target SOC value.

[0098] The second SOC value may be underestimated due to errors. If the first SOC value is greater than the second SOC value, the more accurate second SOC value can be used as the target SOC value for display, so that the SOC value can be closer to the actual value and reach 100% more smoothly, thus avoiding jumps in the SOC value due to errors.

[0099] 208. If the first SOC value is less than the second SOC value, the second SOC value shall be used as the current target SOC value.

[0100] If the first SOC value is less than or equal to the second SOC value, the larger second SOC value can be used as the target SOC value to ensure the smoothness of the SOC value estimation.

[0101] This application can obtain a more accurate SOC value through software algorithms alone, thereby improving the accuracy and reliability of SOC value estimation under low-cost hardware conditions.

[0102] Please see Figure 3 The figure shows the structure of the SOC value estimation device during charging provided in an embodiment of this application.

[0103] like Figure 3 As shown, the device includes:

[0104] The first acquisition module 11 is used to acquire the input voltage value and input current value of the charging device during the current charging process;

[0105] The first estimation module 12 is used to estimate the SOC value corresponding to the input voltage value and the input current value by acquiring a first data table, and obtain the first SOC value;

[0106] The second acquisition module 13 is used to acquire the actual voltage value and / or actual current value of the battery cell;

[0107] The second estimation module 14 is used to estimate the SOC value corresponding to the acquired actual voltage value and / or actual current value by obtaining a second data table, thereby obtaining a second SOC value; and

[0108] The determination module 15 is used to determine the current target SOC value based on the first SOC value and the second SOC value.

[0109] In one embodiment, the first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device.

[0110] The first estimation module 12 and the second estimation module 14 can refer to corresponding software modules or exist as hardware, such as executing the functions of the estimation modules through an execution element such as a processor.

[0111] Of course, the specific execution method of the above modules can achieve the following: Figure 1 and Figure 2 The specific implementation details of any of the above embodiments in the SOC value estimation method during charging are not elaborated here.

[0112] As used herein, the term "module" can refer to a software object that executes on the computing system. The various components, modules, engines, and services described herein can be implementations on the computing system. The apparatus and methods described herein can be implemented in software or hardware, both of which are within the scope of this application.

[0113] Please see Figure 4 The figure shows the structure of the electronic device provided in an embodiment of this application.

[0114] like Figure 4 As shown, the electronic device 20 includes a processor 21 and a memory 22, and the processor 21 and the memory 22 are electrically connected.

[0115] The memory 22 stores a computer program, and the processor 21 executes the following steps by calling the computer program stored in the memory 22:

[0116] The system acquires the input voltage and input current values ​​of the charging device during the current charging process; estimates the SOC value corresponding to the input voltage and input current values ​​by acquiring a first data table to obtain a first SOC value; acquires the actual voltage and / or actual current value of the battery cell; estimates the SOC value corresponding to the acquired actual voltage and / or actual current values ​​by acquiring a second data table to obtain a second SOC value; and determines the current target SOC value based on the first SOC value and the second SOC value.

[0117] It is understood that the processor 21 and memory 22 can be of any type as required, such as using a CPU, MCU, FPGA or ASIC as the processor 21, and this application does not limit them.

[0118] In one embodiment, the processor 21 can also be used to perform:

[0119] Determine whether the input current value is greater than the preset maximum current value in the first data table; if so, re-acquire the input current value.

[0120] In one embodiment, the processor 21 can also be used to perform:

[0121] Determine whether the actual voltage value of the battery cell during the current charging process is greater than the preset voltage value; or determine whether the estimated SOC value during the current charging process is greater than the preset SOC value; or determine whether the current charging process has entered the CV stage.

[0122] In one embodiment, the processor 21 can also be used to perform:

[0123] The input voltage value of the charging device is calibrated.

[0124] In one embodiment, the processor 21 can also be used to perform:

[0125] Determine whether the first SOC value is greater than the second SOC value; if yes, then use the first SOC value as the current target SOC value; if no, then use the second SOC value as the current target SOC value.

[0126] In one embodiment, the processor 21 can also be used to perform:

[0127] The corresponding first data table is determined based on the input voltage value.

[0128] The electronic device can be an electronic device with a battery cell, such as a smartphone, laptop, vacuum cleaner, or other electronic device that requires an estimated SOC value.

[0129] This electronic device can sample and acquire the input voltage and current values ​​of the battery cell and the connected charging device through sampling modules, and provide them to the processing module for SOC (System on Chip) estimation. Common processing modules in the field, such as MCUs (Microcontroller Units), CPUs (Central Processing Units), or SOCs, can be used. Other chip modules with data processing capabilities, such as FPGAs, can also be used; this application does not limit the choice. Once the SOC value is obtained, it can be displayed to the user through a display, speaker, or other means; the display method is not limited.

[0130] The electronic device of this application utilizes the input voltage and input current values ​​of the charging device to estimate a first SOC value using a first data table, and then acquires the actual voltage and / or actual current values ​​of the battery cell to obtain a second SOC value. The target SOC value is obtained using both the first and second SOC values. This application achieves a more accurate SOC value solely through software algorithms, improving the accuracy and reliability of SOC estimation under low-cost hardware conditions.

[0131] In this application embodiment, the electronic device and the SOC value estimation device during charging are based on the same concept as the SOC value estimation method during charging in the above embodiment. Any method step provided in the SOC value estimation method embodiment during charging can be run on the electronic device and the SOC value estimation device during charging. For details of the specific implementation process, please refer to the SOC value estimation method embodiment during charging. Any combination can be used to form optional embodiments of this application, which will not be repeated here.

[0132] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A method for estimating the State of Charge (SOC) value during charging, applied to electronic devices with battery cells, characterized in that, The method includes: Obtain the input voltage and input current values ​​of the charging device during the current charging process; The first SOC value is obtained by estimating the SOC value corresponding to the input voltage value and the input current value by acquiring the first data table; the first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device. Obtain the actual voltage and / or actual current value of the battery cell; The second SOC value is obtained by estimating the SOC value corresponding to the actual voltage value and / or the actual current value obtained by acquiring the second data table; Determining the current target SOC value based on the first SOC value and the second SOC value includes determining whether the first SOC value is greater than or equal to the second SOC value; if yes, then the first SOC value is used as the current target SOC value; if no, then the second SOC value is used as the current target SOC value.

2. The SOC value estimation method during charging as described in claim 1, characterized in that, Estimate the SOC value corresponding to the input voltage value and the input current value by obtaining the first data table, including: Determine whether the input current value is greater than the preset maximum current value in the first data table; If so, then reacquire the input current value.

3. The method for estimating SOC value during charging as described in claim 1, characterized in that, Before acquiring the input voltage and input current values ​​of the charging device during the current charging process, the method further includes: Determine whether the actual voltage value of the battery cell during the current charging process is greater than the preset voltage value; or Determine whether the estimated SOC value during the current charging process is greater than the preset SOC value; or Determine whether the current charging process has entered the CV stage.

4. The method for estimating SOC value during charging as described in claim 1, characterized in that, Before acquiring the input voltage and input current values ​​of the charging device during the current charging process, the method further includes: The input voltage value of the charging device is calibrated.

5. The method for estimating SOC value during charging as described in claim 1, characterized in that, The first data table includes at least two; The step of estimating the SOC value corresponding to the input voltage value and the input current value by obtaining the first data table includes: The corresponding first data table is determined based on the input voltage value.

6. A device for estimating SOC value during charging, characterized in that, The device includes: The first acquisition module is used to acquire the input voltage and input current values ​​of the charging device during the current charging process; The first estimation module is used to estimate the SOC value corresponding to the input voltage value and the input current value by acquiring a first data table to obtain a first SOC value; the first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device; The second acquisition module is used to acquire the actual voltage value and / or actual current value of the battery cell; The second estimation module is used to estimate the SOC value corresponding to the acquired actual voltage value and / or actual current value by obtaining a second data table, thereby obtaining a second SOC value; and The determination module is used to determine the current target SOC value based on the first SOC value and the second SOC value, including determining whether the first SOC value is greater than or equal to the second SOC value; if yes, then the first SOC value is used as the current target SOC value; if no, then the second SOC value is used as the current target SOC value.

7. The SOC value estimation device during charging as described in claim 6, characterized in that, The first data table includes the relationship between different SOC values ​​and different input current values ​​under multiple different input voltage values ​​of the charging device.

8. An electronic device, characterized in that, The electronic device includes: Processor; and The memory stores a computer program, and the processor executes the SOC value estimation method during charging as described in any one of claims 1-5 by calling the computer program stored in the memory.

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