Battery state detection method and device and storage medium
By obtaining the current cycle discharge times and lithium-ion battery and determining the lithium-ion state of the battery based on the corresponding relationship, the problems of simplicity, accuracy and high error detection rate of lithium-ion detection in the prior art are solved, and efficient and accurate battery status detection is achieved.
Patent Information
- Application Number
- CN202311533339.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-16
- Publication Date
- 2025-05-16
AI Technical Summary
The prior art is difficult to achieve simple, easy to realize, real-time and lossless lithium-ion battery lithium-ion battery detection, and there is a problem of high error detection rate.
By obtaining the current cycle discharge times of the battery and the lithium-extraction detection parameter value, the lithium-extraction state of the battery is determined based on the correspondence between the cycle discharge times and the lithium-extraction detection parameter threshold. The lithium-ion detection parameters include the available capacity loss rate and internal resistance. By fitting the data of different temperature segments, the corresponding relationship is obtained.
It realizes simple and efficient lithium-ion detection, reduces the probability of false detection, has high accuracy, can detect lithium-ion status of battery in a timely manner, and extends battery life.
Smart Images
Figure CN120009745A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of batteries, and in particular to a battery status detection method, device and storage medium. Background Art
[0002] With the development of science and technology, lithium-ion batteries are widely used in electronic devices and serve as energy storage and conversion devices for electronic devices.
[0003] However, the reactions and changes that occur inside lithium batteries have a significant impact on their reliability and battery performance. For example, when lithium ions are deposited in lithium-ion batteries, it may cause a short circuit and accelerate battery aging. Therefore, timely detection of the lithium deposition state of the battery is extremely important for protecting the reliability and performance of the battery. Summary of the invention
[0004] In order to overcome the problems existing in the related art, the present disclosure provides a battery status detection method, device and storage medium.
[0005] According to a first aspect of an embodiment of the present disclosure, a battery status detection method is provided, comprising: obtaining a current number of discharge cycles and a current lithium deposition detection parameter value of a battery; determining a lithium deposition status of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and a corresponding relationship between the number of discharge cycles and a lithium deposition detection parameter threshold; wherein the lithium deposition detection parameter threshold is a lithium deposition parameter value that determines that the lithium deposition status of the battery is a lithium deposition phenomenon under a corresponding number of discharge cycles.
[0006] In one embodiment, the lithium deposition detection parameters include a battery available capacity loss rate, and the battery available capacity loss rate is determined based on the current discharge cut-off capacity and a preset capacity of the battery; the lithium deposition state of the battery is determined based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the correspondence between the number of discharge cycles and the lithium deposition detection parameter threshold, including: determining a current available capacity loss rate threshold corresponding to the current number of battery cycles based on the current number of discharge cycles and a first correspondence, the first correspondence characterizing the correspondence between the number of battery discharge cycles and the available capacity loss rate threshold; if the current available capacity loss rate is greater than the current available capacity loss rate threshold, the battery lithium deposition state is determined to be a state in which lithium deposition occurs.
[0007] In one embodiment, the lithium deposition detection parameters also include battery internal resistance; before determining that the battery lithium deposition state is a state in which lithium deposition occurs, the method also includes: determining a current battery internal resistance threshold corresponding to the current battery discharge cycle number based on the current battery discharge cycle number and a second corresponding relationship, and determining that the current battery internal resistance is less than the current battery internal resistance threshold, and the second corresponding relationship characterizes the correspondence between the battery discharge cycle number and the battery internal resistance threshold.
[0008] In one embodiment, the first corresponding relationship is determined in the following manner: a battery is cyclically discharged based on different temperature sections, and the number of battery cyclic discharges based on different temperature sections and the discharge cut-off capacity of each cycle are recorded; based on the discharge cut-off capacity and a preset capacity, an available capacity loss rate threshold is determined; based on the available capacity loss rate threshold and the number of battery cyclic discharges, initial first corresponding relationships corresponding to different temperature sections are determined; and the initial first corresponding relationships corresponding to the different temperature sections are fitted to obtain the first corresponding relationship.
[0009] In one embodiment, the second corresponding relationship is determined in the following manner: a battery is cyclically discharged based on different temperature segments, and the number of battery cyclic discharges based on different temperature segments is recorded as well as the cut-off voltage, cut-off current and open circuit voltage of each cycle; a battery internal resistance threshold is determined based on the cut-off voltage, the cut-off current and the open circuit voltage; an initial second corresponding relationship corresponding to different temperature segments is determined based on the battery internal resistance threshold and the number of battery cyclic discharges; and the initial second corresponding relationship corresponding to the different temperature segments is fitted to obtain the second corresponding relationship.
[0010] In one implementation, the number of discharge cycles is determined in the following manner: in response to detecting that the discharge capacity of the battery is greater than a preset discharge capacity threshold, it is determined as one discharge cycle.
[0011] According to a second aspect of an embodiment of the present disclosure, there is provided a battery status detection device, comprising:
[0012] An acquisition unit is used to obtain the current number of discharge cycles of the battery and the current lithium plating detection parameter value;
[0013] A determination unit, configured to determine the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the corresponding relationship between the number of discharge cycles and the lithium deposition detection parameter threshold;
[0014] The lithium deposition detection parameter threshold is a lithium deposition parameter value for determining that the lithium deposition state of the battery is a lithium deposition phenomenon under a corresponding number of cycle discharges.
[0015] In one embodiment, the lithium deposition detection parameters include a battery available capacity loss rate, and the battery available capacity loss rate is determined based on the current discharge cut-off capacity and a preset capacity of the battery; the determination unit determines the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the correspondence between the number of discharge cycles and the lithium deposition detection parameter threshold in the following manner: based on the current number of discharge cycles and a first correspondence, determine the current available capacity loss rate threshold corresponding to the current number of battery cycles, the first correspondence characterizing the correspondence between the number of battery discharge cycles and the available capacity loss rate threshold; if the current available capacity loss rate is greater than the current available capacity loss rate threshold, determine that the battery lithium deposition state is a state in which lithium deposition occurs.
[0016] In one embodiment, the lithium deposition detection parameters also include battery internal resistance; before determining that the battery lithium deposition state is a state in which lithium deposition occurs, the determination unit is also used to: determine a current battery internal resistance threshold corresponding to the current battery discharge cycle number based on the current battery discharge cycle number and a second corresponding relationship, and determine that the current battery internal resistance is less than the current battery internal resistance threshold, and the second corresponding relationship characterizes the correspondence between the battery discharge cycle number and the battery internal resistance threshold.
[0017] In one embodiment, the determination unit determines the first corresponding relationship in the following manner: cyclically discharging the battery based on different temperature segments, and recording the number of battery cyclic discharges based on different temperature segments and the discharge cut-off capacity of each cycle; determining an available capacity loss rate threshold based on the discharge cut-off capacity and a preset capacity; determining initial first corresponding relationships corresponding to different temperature segments based on the available capacity loss rate threshold and the number of battery cyclic discharges; and fitting the initial first corresponding relationships corresponding to the different temperature segments to obtain the first corresponding relationship.
[0018] In one embodiment, the determination unit determines the second corresponding relationship in the following manner: cyclically discharges the battery based on different temperature segments, and records the number of battery cyclic discharges based on different temperature segments as well as the cut-off voltage, cut-off current and open circuit voltage of each cycle; determines the battery internal resistance threshold based on the cut-off voltage, the cut-off current and the open circuit voltage; determines the initial second corresponding relationships corresponding to different temperature segments based on the battery internal resistance threshold and the number of battery cyclic discharges; and fits the initial second corresponding relationships corresponding to the different temperature segments to obtain the second corresponding relationship.
[0019] In one implementation, the acquisition unit determines the number of cycle discharges in the following manner: in response to detecting that the battery discharge capacity is greater than a preset discharge capacity threshold, it is determined as one cycle discharge number.
[0020] According to a third aspect of an embodiment of the present disclosure, there is provided a battery status detection device, including:
[0021] processor;
[0022] a memory for storing processor-executable instructions;
[0023] The processor is configured to: execute the method described in the first aspect or any one of the embodiments of the first aspect.
[0024] According to a fourth aspect of an embodiment of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the battery status detection method described in the first aspect or any one of the embodiments of the first aspect.
[0025] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by obtaining the current number of cycle discharges of the current battery and the current lithium deposition detection parameter value, and determining the lithium deposition state of the battery according to the current number of cycle discharges of the current battery, the current lithium deposition detection parameter value and the correspondence between the number of cycle discharges and the lithium deposition detection parameter threshold, simple and efficient lithium deposition detection is achieved with high accuracy.
[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0028] Figure 1 The figure is a flow chart showing a method for detecting a battery status according to an exemplary embodiment.
[0029] Figure 2 The figure is a flow chart showing a method for detecting a battery status according to an exemplary embodiment.
[0030] Figure 3 The figure is a flow chart showing a method for detecting a battery status according to an exemplary embodiment.
[0031] Figure 4 The invention is a flowchart showing a method for determining a first corresponding relationship according to an exemplary embodiment.
[0032] Figure 5 is a schematic diagram showing an initial first corresponding relationship according to an exemplary embodiment.
[0033] Figure 6The figure is a flowchart of a method for determining a second corresponding relationship according to an exemplary embodiment.
[0034] Figure 7 is a schematic diagram showing an initial second corresponding relationship according to an exemplary embodiment.
[0035] Figure 8 The figure is a flow chart showing a method for detecting a battery status according to an exemplary embodiment.
[0036] Fig. 9 The figure is a block diagram of a battery status detection device according to an exemplary embodiment.
[0037] Fig.10 The invention is a block diagram showing a device for detecting a battery status according to an exemplary embodiment. DETAILED DESCRIPTION
[0038] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure.
[0039] The battery status detection method provided in the present disclosure is applied to a scenario where an electronic device detects a battery status, for example, it is applied to a scenario where an electronic device detects a lithium deposition status of a battery.
[0040] With the development of science and technology, more and more electronic devices use lithium-ion batteries as energy storage conversion devices. However, when lithium-ion batteries are charged, due to low temperature, excessive charging current rate and other reasons, lithium ions will accumulate near the negative electrode interface, and continue to be reduced to lithium metal and deposited on the electrode surface, forming lithium dendrites, which will cause internal short circuits in the battery. In addition, as the battery cycles, root fractures may occur, increasing irreversible lithium damage and accelerating battery aging. Therefore, it is very necessary to detect lithium deposition in batteries in electronic devices.
[0041] In the related art, the lithium deposition of the battery can be detected by scanning electron microscope (SEM), transmission electron microscope (TEM), high-precision Coulomb method, discharge platform method and electrochemical impedance spectroscopy (EIS) analysis method, but the detection of the battery by SEM and TEM will cause battery damage, the high-precision Coulomb method has a large amount of calculation, and the detection equipment is expensive, the discharge platform method is used to detect a large amount of lithium deposition, and the detection accuracy is relatively low, the shelf time is long, and the electrochemical impedance spectroscopy method has high requirements for the test instrument. Therefore, the related art cannot realize simple, easy to implement, real-time, and non-destructive lithium deposition detection. In addition, there is also an Arrhenius method in the related art to determine whether the battery has lithium deposition by judging whether the battery capacity decay rate and the temperature meet the linear relationship, thereby realizing timely detection of battery lithium deposition. However, the Arrhenius method requires accurate real-time collection of battery temperature. Due to sampling, the linear relationship between capacity decay rate and temperature will be seriously offset, resulting in a large error rate in lithium plating detection.
[0042] Therefore, the present disclosure provides a battery status detection method, which obtains the current number of cycle discharges and the current lithium deposition detection parameter value of the battery; based on the current number of cycle discharges, the current lithium deposition detection parameter value and the corresponding relationship between the number of cycle discharges and the lithium deposition detection parameter threshold, the lithium deposition state of the battery is determined, thereby realizing simple and efficient lithium deposition detection and reducing the probability of false detection.
[0043] Figure 1 is a flow chart of a battery status detection method according to an exemplary embodiment. Figure 1 As shown, the battery status detection method is used in an electronic device and includes the following steps.
[0044] In step S11, the current number of discharge cycles of the battery and the current lithium plating detection parameter value are obtained.
[0045] In the embodiment of the present disclosure, when the electronic device detects that the battery cycle discharge is completed, the current cycle discharge number of the current battery and the current lithium plating detection parameter value are obtained.
[0046] In the embodiment of the present disclosure, the current number of cycle discharges of the battery and the current lithium plating detection parameter value can be obtained through a power meter installed in the electronic device.
[0047] In step S12, the lithium deposition state of the battery is determined based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the corresponding relationship between the number of discharge cycles and the lithium deposition detection parameter threshold.
[0048] The lithium deposition detection parameter threshold is a lithium deposition parameter value for determining that the lithium deposition state of the battery is a lithium deposition phenomenon under a corresponding number of cycle discharges.
[0049] In the embodiment of the present disclosure, the lithium deposition detection parameter threshold corresponding to the current number of cycle discharges can be determined according to the correspondence between the number of cycle discharges and the lithium deposition detection parameter threshold.
[0050] In the disclosed embodiment, based on the relationship between the lithium deposition detection parameter threshold corresponding to the current number of cycle discharges and the current lithium deposition detection parameter value, it is determined that the current state of the battery is a lithium deposition state.
[0051] In the disclosed embodiment, by obtaining the current number of discharge cycles and the current lithium deposition detection parameter value of the current battery, and determining the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the corresponding relationship between the number of discharge cycles and the lithium deposition detection parameter threshold, simple and efficient lithium deposition detection is achieved with high accuracy.
[0052] In the embodiment of the present disclosure, the lithium plating detection parameter may include the battery available capacity loss rate. The battery available capacity loss rate may be determined by the current discharge cut-off capacity of the battery and the preset capacity. For example, the battery available capacity loss rate may be determined by the following formula:
[0053]
[0054] Wherein, k represents the battery available capacity loss rate, Qnow represents the battery current discharge cut-off capacity, and Qfirst represents the preset capacity. Wherein, the battery current discharge cut-off capacity can be understood as the battery capacity at the end of the cycle discharge.
[0055] In the embodiment of the present disclosure, the current cut-off discharge capacity of the battery can be obtained by a power meter installed in the electronic device. The initial discharge capacity can be pre-set by relevant technicians based on the test battery.
[0056] Figure 2 is a flow chart of a battery status detection method according to an exemplary embodiment. Figure 2 As shown, the battery status detection method is used in an electronic device and includes the following steps.
[0057] In step S21, based on the current number of cycle discharges and the first corresponding relationship, a current available capacity loss rate threshold corresponding to the current number of battery cycles is determined.
[0058] The first corresponding relationship represents the corresponding relationship between the number of battery discharge cycles and the available capacity loss rate threshold.
[0059] In the implementation of the present disclosure, based on the current battery cycle number, the available capacity loss rate threshold corresponding to the current cycle number can be obtained in the first corresponding relationship.
[0060] In step S22, if the current available capacity loss rate is greater than the current available capacity loss rate threshold, it is determined that the battery lithium deposition state is a state where lithium deposition occurs.
[0061] In the embodiment of the present disclosure, the loss rate threshold of the current available capacity obtained through the first corresponding relationship is compared with the current available capacity loss rate. If the current available capacity loss rate is greater than the current available capacity loss rate threshold, it can be determined that the battery lithium deposition state is a state where lithium deposition occurs.
[0062] In the disclosed embodiment, by comparing the current available capacity loss rate threshold value obtained based on the current number of battery cycles and the first corresponding relationship with the current available capacity loss rate, it is determined that the battery is in a lithium deposition state. The available capacity loss rate can intuitively and clearly indicate the lithium deposition state of the battery, and the capacity loss rate can be obtained through the current cut-off discharge capacity of the battery installed in the electronic device, with high accuracy, thereby ensuring the accuracy of detecting the lithium deposition state of the battery.
[0063] In the embodiment of the present disclosure, the lithium deposition detection parameter may also include the battery internal resistance. The battery internal resistance may be understood as the battery internal resistance when the discharge is cut off during cyclic discharge. The battery internal resistance may be determined by the battery voltage, battery current, and open circuit voltage when the discharge is cut off. For example, the battery internal resistance may be determined by the following formula:
[0064] Rend=(OCV-Vbat) / Ibat (2)
[0065] Wherein, Rend represents the internal resistance of the battery, OCV represents the open circuit voltage, wherein the open circuit voltage can be the open circuit voltage after a certain period of rest after the discharge is terminated, for example, 30 minutes of rest. Vbat represents the battery voltage at the end of the cycle discharge, and Ibat can represent the battery current at the end of the cycle discharge.
[0066] In the disclosed embodiment, the battery internal resistance, open circuit voltage, battery voltage and battery current can be read by a fuel gauge.
[0067] Figure 3 is a flow chart of a battery status detection method according to an exemplary embodiment. Figure 3 As shown, the battery status detection method is used in an electronic device and includes the following steps.
[0068] In step S31, based on the current number of cycle discharges and the first corresponding relationship, a current available capacity loss rate threshold corresponding to the current number of battery cycles is determined, and it is determined that the current available capacity loss rate is greater than the current available capacity loss rate threshold.
[0069] In step S32, based on the current battery discharge cycle number and the second corresponding relationship, the current battery internal resistance threshold corresponding to the current battery discharge cycle number is determined, and it is determined that the current battery internal resistance is less than the current battery internal resistance threshold.
[0070] The second corresponding relationship represents the corresponding relationship between the number of battery discharge cycles and the battery internal resistance threshold.
[0071] In the embodiment of the present disclosure, the current battery internal resistance threshold corresponding to the current battery cycle number can be obtained in the second corresponding relationship through the current battery cycle number.
[0072] In step S33, it is determined that the lithium deposition state of the battery is a state where lithium deposition occurs.
[0073] In the embodiment of the present disclosure, based on the comparison between the acquired current battery internal resistance threshold and the current battery internal resistance, if it is determined that the current battery internal resistance is less than the current battery internal resistance threshold, it can be determined that the battery lithium deposition state is a state where lithium deposition occurs.
[0074] In the embodiments of the present disclosure, it can be understood that the battery-like lithium deposition state can be determined to be the occurrence of lithium deposition by determining that the current available capacity loss rate is greater than the current available capacity loss rate threshold; or, the battery-like lithium deposition state can be determined to be the occurrence of lithium deposition by determining that the current battery internal resistance is less than the current battery internal resistance threshold.
[0075] In the embodiments of the present disclosure, the current battery internal resistance can be judged based on when it is determined that the current available capacity loss rate is greater than the current available capacity loss rate threshold; when it is determined that the current battery internal resistance is less than the current battery internal resistance threshold, it can be determined that the battery lithium deposition state is the occurrence of lithium deposition phenomenon; or the current available capacity loss rate can be judged based on when it is determined that the current battery internal resistance is less than the current battery internal resistance threshold; when it is determined that the current available capacity loss rate is greater than the current available capacity loss rate threshold, it is determined that the battery lithium deposition state is the occurrence of lithium deposition phenomenon.
[0076] In the disclosed embodiment, by comparing the current battery internal resistance threshold value obtained based on the current battery cycle number and the second corresponding relationship with the current battery internal resistance, it is determined that the battery lithium deposition state is the occurrence of lithium deposition. The relationship between the battery internal resistance and the current battery internal resistance threshold value can intuitively and clearly indicate the lithium deposition state of the battery, and the battery internal resistance can be calculated by obtaining relevant parameters through a power meter installed in an electronic device, with high accuracy, thereby ensuring the accuracy of detecting the battery lithium deposition state.
[0077] In the embodiment of the present disclosure, the first corresponding relationship can be determined by obtaining different numbers of cycle discharges and available capacity loss rate thresholds corresponding to the numbers of cycle discharges.
[0078] In the embodiment of the present disclosure, the corresponding relationship between the number of cycle discharges in different temperature sections and the available capacity loss rate threshold can be obtained.
[0079] Figure 4 is a flow chart showing a method for determining a first corresponding relationship according to an exemplary embodiment. Figure 4 As shown, the battery status detection method is used in an electronic device and includes the following steps.
[0080] In step S41, the battery is cyclically discharged based on different temperature sections, and the number of battery cyclic discharges based on different temperature sections and the discharge cut-off capacity of each cycle are recorded.
[0081] In the embodiments of the present disclosure, the battery can be cyclically discharged based on different temperature segments. For example, it can be divided into a low temperature segment, a normal temperature segment, and a high temperature segment, wherein the low temperature segment can be 0 to 15 degrees, the normal temperature segment can be 15 to 35 degrees, and the temperature above 35 degrees can be divided into a high temperature segment. The temperature segments can be divided according to the specifications of the battery cells.
[0082] In the implementation of the present disclosure, the battery in different temperature ranges can be cycled and discharged. For example, the number of cycle discharges in different temperature ranges can be determined according to the battery specification, such as performing a total of 800 cycles in low temperature, normal temperature and high temperature ranges.
[0083] In step S42, based on the discharge cut-off capacity and the preset capacity, an available capacity loss rate threshold is determined.
[0084] In the embodiment of the present disclosure, the available capacity loss rate threshold can be determined by determining the ratio between the discharge cut-off capacity and the preset capacity. For example, the available capacity loss rate threshold can be determined by the formula shown in (1).
[0085] In step S43, based on the available capacity loss rate threshold and the number of battery cycle discharges, initial first corresponding relationships corresponding to different temperature sections are determined.
[0086] In the embodiment of the present disclosure, based on the available capacity loss rate threshold and the battery cycle discharge times, the initial first corresponding relationship corresponding to different temperature sections is determined. In the first corresponding relationship, the available capacity loss rate threshold and the battery cycle discharge times are basically linear. Figure 5 is a schematic diagram showing an initial first correspondence relationship according to an exemplary embodiment. Figure 5 As shown, with the battery cycle discharge times (n) as the horizontal axis and the available capacity loss rate threshold value (k) as the vertical axis, a relationship curve between the battery cycle discharge times and the available capacity loss rate threshold value is plotted, and the following is obtained: Figure 5 The capacity loss rate threshold curve 1 shown in FIG. 1 shows that the available capacity loss rate threshold is basically linearly related to the number of battery cycle discharges. For example, Figure 5 The form of k=a*n+b shown in the figure expresses the linear relationship between the available capacity loss rate threshold and the number of battery cycle discharges, wherein a and b are constant coefficients, which can be determined by different available capacity loss rate thresholds and battery cycle discharges, k is the available capacity loss rate threshold, and n is the number of battery cycle discharges.
[0087] In the embodiment of the present disclosure, taking into account the current, sampling voltage and battery aging of the fuel gauge in the terminal, a floating range of the available capacity loss rate threshold is set. When it is detected that the current available capacity loss rate is within the capacity loss rate threshold range, it can be understood that the current available capacity loss rate is less than or equal to the current available capacity loss rate threshold, that is, the battery lithium deposition state is a state where lithium deposition does not occur. For example, Figure 5 As shown, the floating range of the available capacity loss rate threshold can be set to ±2%.
[0088] In step S44, the initial first corresponding relationships corresponding to different temperature sections are fitted to obtain the first corresponding relationship.
[0089] In the disclosed embodiment, the obtained initial first correspondences corresponding to different temperature segments can be fitted to obtain the first correspondence. For example, the initial first correspondence of the low temperature segment and the initial first correspondence of the normal temperature segment are fitted into the first correspondence through a fitting formula, and then the fitting formulas of the different temperature segments are determined.
[0090] In the disclosed embodiment, when obtaining the current number of discharge cycles of the battery and the current lithium plating detection parameter value, the temperature segment in which the current electronic device is located can also be obtained, and the current available capacity loss rate determined based on the temperature segment is converted into the current available capacity loss rate corresponding to the first corresponding relationship through a fitting formula, and then, based on the current number of discharge cycles, the current available capacity loss rate threshold is determined in the first corresponding relationship, and then the lithium plating state of the battery is determined.
[0091] In the disclosed embodiment, the initial first correspondences corresponding to different temperature segments are fitted into the first correspondences, thereby avoiding multiple initial first correspondences from occupying too much memory. The corresponding lithium deposition detection parameter threshold can be quickly determined based on the first correspondences, thereby achieving simple, efficient and timely lithium deposition detection.
[0092] In the embodiment of the present disclosure, the second corresponding relationship can be determined by obtaining different numbers of cycle discharges and battery internal resistance thresholds corresponding to the numbers of cycle discharges.
[0093] In the disclosed embodiment, the correspondence between the number of cycle discharges in different temperature ranges and the battery internal resistance threshold can be obtained.
[0094] Figure 6 is a flow chart showing a method for determining a second corresponding relationship according to an exemplary embodiment. Figure 6 As shown, the battery status detection method is used in an electronic device and includes the following steps.
[0095] In step S51, the battery is cyclically discharged based on different temperature sections, and the number of cyclic discharges of the battery based on different temperature sections as well as the cut-off voltage, cut-off current and open circuit voltage of each cycle are recorded.
[0096] In step S52, the battery internal resistance threshold is determined based on the cut-off voltage, the cut-off current and the open circuit voltage.
[0097] In the embodiment of the present disclosure, the battery internal resistance threshold is determined based on the cut-off voltage, the cut-off current and the open circuit voltage. For example, the battery internal resistance threshold can be calculated by the formula shown in (2).
[0098] In step S53, based on the battery internal resistance threshold and the number of battery cycle discharges, initial second corresponding relationships corresponding to different temperature sections are determined.
[0099] In the embodiment of the present disclosure, the initial second corresponding relationships corresponding to different temperature sections are determined based on the battery internal resistance threshold and the number of battery cycle discharges. Figure 7 is a schematic diagram showing an initial second correspondence relationship according to an exemplary embodiment. Figure 7As shown in the figure, the relationship curve between the battery discharge cycle number (n) and the battery internal resistance threshold is plotted with the battery discharge cycle number (n) as the horizontal axis and the battery internal resistance (R) as the vertical axis. Figure 7 The battery internal resistance threshold curve 2 is shown. Based on the battery internal resistance threshold curve 2, the corresponding relationship between the battery cycle discharge times and the battery internal resistance threshold can be determined.
[0100] In the embodiment of the present disclosure, considering the current, sampling voltage and battery aging of the fuel gauge in the terminal, a floating range of the battery internal resistance threshold is set. When it is detected that the current battery internal resistance is within the battery internal resistance threshold range, it can be understood that the current battery internal resistance is greater than or equal to the current battery internal resistance threshold, that is, the battery lithium deposition state is a state where lithium deposition does not occur. For example, Figure 5 As shown, the floating range of the battery internal resistance threshold can be set to +2%.
[0101] In step S54, the initial second corresponding relationships corresponding to different temperature sections are fitted to obtain the second corresponding relationships.
[0102] In the disclosed embodiment, the obtained initial second corresponding relationships corresponding to different temperature segments can be fitted to obtain the second corresponding relationship. For example, the initial second corresponding relationship of the low temperature segment and the initial second corresponding relationship of the normal temperature segment are fitted into the second corresponding relationship through a fitting formula, and then the fitting formulas of different temperature segments are determined.
[0103] In the embodiment of the present disclosure, when obtaining the current number of discharge cycles of the battery and the current lithium plating detection parameter value, the temperature segment in which the current electronic device is located can also be obtained. The current battery internal resistance determined based on the temperature segment is converted into the current battery internal resistance corresponding to the second corresponding relationship through a fitting formula. Then, based on the current number of discharge cycles, the current battery internal resistance threshold is determined in the second corresponding relationship, and then the lithium plating state of the battery is determined.
[0104] In the disclosed embodiment, the initial second correspondences corresponding to different temperature segments are fitted into the second correspondences, thereby avoiding multiple initial second correspondences from occupying too much memory. The corresponding lithium deposition detection parameter threshold can be quickly determined based on the second correspondences, thereby achieving simple, efficient and timely lithium deposition detection.
[0105] In the embodiment of the present disclosure, the number of discharge cycles can be counted by a power meter provided in the electronic device.
[0106] In the embodiment of the present disclosure, when it is detected that the battery discharge capacity is greater than a preset discharge capacity threshold, it is determined that the electronic device has performed a discharge cycle. For example, the fuel gauge in the electronic device detects that the battery discharge capacity is greater than a preset discharge capacity threshold, for example, when the current discharge capacity exceeds 90% of the total battery capacity, it is determined that the electronic device has completed a cycle discharge, and the fuel gauge counts the number of discharge cycles by one.
[0107] In the embodiment of the present disclosure, in response to determining that the battery lithium deposition state is experiencing lithium deposition, the electronic device may execute a corresponding battery strategy for alleviating the battery lithium deposition phenomenon and a battery strategy for extending the battery life.
[0108] In the disclosed embodiment, a battery strategy for slowing down the lithium deposition phenomenon and a battery strategy for extending the battery life can be preset. For example, a battery strategy for slowing down the lithium deposition phenomenon can be to reduce the charging current, prompt the user to increase the charging temperature of the mobile phone, etc.; a battery strategy for extending the battery life can be to cycle down the voltage, increase the shutdown voltage, etc.
[0109] In the disclosed embodiment, when the electronic device detects that the battery has undergone a cycle discharge, the current cycle discharge number of the battery and the current analysis detection parameter value are obtained, wherein the current analysis detection parameter value includes the current battery available capacity loss rate and the current battery internal resistance. And the current battery available capacity loss rate threshold and the current battery internal resistance threshold corresponding to the current cycle discharge number can be determined based on the current cycle discharge number, the first corresponding relationship and the second corresponding relationship. When it is determined that the current battery available capacity loss rate is greater than the current battery available capacity loss rate threshold and / or the current battery internal resistance is less than the current battery internal resistance threshold, it is determined that the battery has lithium deposition. At this time, the electronic device can execute the corresponding battery strategy to mitigate the battery lithium deposition phenomenon and the battery strategy to extend the battery life, thereby achieving simple, efficient and highly accurate analysis lithium deposition detection, reducing the probability of false detection, and being able to achieve battery aging prediction and repair, extend battery life, and improve battery health.
[0110] In the embodiments of the present disclosure, the battery status detection method is described in conjunction with the following examples.
[0111] In the embodiment of the present disclosure, in response to the electronic device determining that a cycle discharge is completed, the following is performed: Figure 8 Steps shown. Figure 8 The figure is a flow chart showing a method for detecting a battery status according to an exemplary embodiment.
[0112] In the embodiment of the present disclosure, in response to determining that the battery has completed a cycle discharge, detection is started. The electronic device reads the current discharge cycle number and the current discharge cut-off capacity in the fuel gauge. The current available capacity loss rate is calculated based on the read current discharge cut-off capacity and the preset capacity. It is determined whether the point corresponding to the current discharge cycle number and the current available capacity loss rate is located at the position shown in FIG. Figure 5 If the value is below the linear relationship curve between the available capacity loss rate threshold and the number of battery cycle discharge times, or is in the floating range of the available capacity loss rate threshold, the detection is terminated. If the value is not below the linear relationship curve between the available capacity loss rate threshold and the number of battery cycle discharge times, or is in the floating range of the available capacity loss rate threshold, the cutoff voltage, cutoff current and open circuit voltage in the fuel gauge are read, and the current battery internal resistance is calculated. Determine whether the current battery internal resistance is in the range shown in FIG. Figure 7 If the value is above the relationship curve between the number of battery discharge cycles and the battery internal resistance threshold, or in the floating range of the battery internal resistance threshold, the detection stops; if it is not above the relationship curve between the number of battery discharge cycles and the battery internal resistance threshold, or in the floating range of the battery internal resistance threshold, it is determined that the battery has lithium deposition and the corresponding battery strategy is executed.
[0113] Based on the same concept, an embodiment of the present disclosure also provides a battery status detection device.
[0114] It is understandable that in order to realize the above functions, the battery status detection device provided by the embodiment of the present disclosure includes hardware structures and / or software modules corresponding to the execution of each function. In combination with the units and algorithm steps of each example disclosed in the embodiment of the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.
[0115] Fig. 9 is a block diagram of a battery status detection device according to an exemplary embodiment. Fig. 9 The device 100 includes an acquiring unit 101 and a determining unit 102.
[0116] An acquisition unit 101 is used to acquire the current number of discharge cycles of the battery and the current lithium plating detection parameter value;
[0117] A determination unit 102, configured to determine a lithium deposition state of the battery based on a current number of discharge cycles, a current lithium deposition detection parameter value, and a corresponding relationship between the number of discharge cycles and a lithium deposition detection parameter threshold;
[0118] The lithium deposition detection parameter threshold is a lithium deposition parameter value for determining that the lithium deposition state of the battery is a lithium deposition phenomenon under a corresponding number of cycle discharges.
[0119] In one embodiment, the lithium deposition detection parameters include a battery available capacity loss rate, and the battery available capacity loss rate is determined based on the current discharge cut-off capacity and the preset capacity of the battery; the determination unit 102 determines the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the correspondence between the number of discharge cycles and the lithium deposition detection parameter threshold in the following manner: based on the current number of discharge cycles and a first correspondence, determine the current available capacity loss rate threshold corresponding to the current number of battery cycles, the first correspondence characterizing the correspondence between the number of battery discharge cycles and the available capacity loss rate threshold; if the current available capacity loss rate is greater than the current available capacity loss rate threshold, determine that the battery lithium deposition state is a state in which lithium deposition occurs.
[0120] In one embodiment, the lithium deposition detection parameters also include the battery internal resistance; before determining that the battery lithium deposition state is a state in which lithium deposition occurs, the determination unit 102 is also used to: determine a current battery internal resistance threshold value corresponding to the current battery discharge cycle number based on the current battery discharge cycle number and a second corresponding relationship, and determine that the current battery internal resistance is less than the current battery internal resistance threshold value, and the second corresponding relationship characterizes the correspondence between the battery discharge cycle number and the battery internal resistance threshold value.
[0121] In one embodiment, the determination unit 102 determines the first corresponding relationship in the following manner: cyclically discharges the battery based on different temperature segments, and records the number of battery cyclic discharges based on different temperature segments and the discharge cutoff capacity of each cycle; determines the available capacity loss rate threshold based on the discharge cutoff capacity and the preset capacity; determines the initial first corresponding relationships corresponding to the different temperature segments based on the available capacity loss rate threshold and the number of battery cyclic discharges; and fits the initial first corresponding relationships corresponding to the different temperature segments to obtain the first corresponding relationship.
[0122] In one embodiment, the determination unit 102 determines the second corresponding relationship in the following manner: cyclically discharges the battery based on different temperature segments, and records the number of battery cyclic discharges based on different temperature segments as well as the cut-off voltage, cut-off current and open circuit voltage of each cycle; determines the battery internal resistance threshold based on the cut-off voltage, cut-off current and open circuit voltage; determines the initial second corresponding relationships corresponding to the different temperature segments based on the battery internal resistance threshold and the number of battery cyclic discharges; and fits the initial second corresponding relationships corresponding to the different temperature segments to obtain the second corresponding relationship.
[0123] In one implementation, the acquisition unit 101 determines the number of cycle discharges in the following manner: in response to detecting that the battery discharge capacity is greater than a preset discharge capacity threshold, it is determined as one cycle discharge number.
[0124] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.
[0125] Fig.10 2 is a block diagram of a device 200 for battery status detection according to an exemplary embodiment. For example, the device 200 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
[0126] Reference Fig.10 , the device 200 may include one or more of the following components: a processing component 202 , a memory 204 , a power component 206 , a multimedia component 208 , an audio component 210 , an input / output (I / O) interface 212 , a sensor component 214 , and a communication component 216 .
[0127] The processing component 202 generally controls the overall operation of the device 200, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 202 may include one or more processors 220 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 202 may include one or more modules to facilitate interaction between the processing component 202 and other components. For example, the processing component 202 may include a multimedia module to facilitate interaction between the multimedia component 208 and the processing component 202.
[0128] The memory 204 is configured to store various types of data to support operations on the device 200. Examples of such data include instructions for any application or method operating on the device 200, contact data, phone book data, messages, pictures, videos, etc. The memory 204 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
[0129] The power component 206 provides power to the various components of the device 200. The power component 206 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 200.
[0130] The multimedia component 208 includes a screen that provides an output interface between the device 200 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 208 includes a front camera and / or a rear camera. When the device 200 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
[0131] The audio component 210 is configured to output and / or input audio signals. For example, the audio component 210 includes a microphone (MIC), and when the device 200 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 204 or sent via the communication component 216. In some embodiments, the audio component 210 also includes a speaker for outputting audio signals.
[0132] I / O interface 212 provides an interface between processing component 202 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.
[0133] The sensor assembly 214 includes one or more sensors for providing various aspects of the status assessment of the device 200. For example, the sensor assembly 214 can detect the open / closed state of the device 200, the relative positioning of components, such as the display and keypad of the device 200, the sensor assembly 214 can also detect the position change of the device 200 or a component of the device 200, the presence or absence of user contact with the device 200, the orientation or acceleration / deceleration of the device 200 and the temperature change of the device 200. The sensor assembly 214 can include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 214 can also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 214 can also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
[0134] The communication component 216 is configured to facilitate wired or wireless communication between the device 200 and other devices. The device 200 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 216 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
[0135] In an exemplary embodiment, the apparatus 200 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above method.
[0136] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 204 including instructions, and the instructions can be executed by the processor 220 of the device 200 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.
[0137] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.
[0138] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.
[0139] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.
[0140] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.
[0141] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.
[0142] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modifications, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure.
[0143] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.
Claims
1. A battery status detection method, characterized in that: include: Get the current number of battery discharge cycles and current lithium plating detection parameter values; Determine the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the corresponding relationship between the number of discharge cycles and the lithium deposition detection parameter threshold; The lithium deposition detection parameter threshold is a lithium deposition parameter value for determining that the lithium deposition state of the battery is a lithium deposition phenomenon under a corresponding number of cycle discharges.
2. The battery status detection method according to claim 1, characterized in that: The lithium plating detection parameter includes a battery available capacity loss rate, and the battery available capacity loss rate is determined based on the current discharge cut-off capacity and the preset capacity of the battery; The determining the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the corresponding relationship between the number of discharge cycles and the lithium deposition detection parameter threshold value includes: Determine a current available capacity loss rate threshold value corresponding to the current battery cycle number based on the current cycle discharge number and a first corresponding relationship, wherein the first corresponding relationship represents a corresponding relationship between the battery cycle discharge number and the available capacity loss rate threshold value; If the current available capacity loss rate is greater than the current available capacity loss rate threshold, it is determined that the battery lithium deposition state is a state where lithium deposition occurs.
3. The method according to claim 2, characterized in that The lithium plating detection parameters also include battery internal resistance; Before determining that the battery lithium deposition state is a state where lithium deposition occurs, the method further includes: Based on the current battery discharge cycle number and a second corresponding relationship, a current battery internal resistance threshold corresponding to the current battery discharge cycle number is determined, and it is determined that the current battery internal resistance is less than the current battery internal resistance threshold, wherein the second corresponding relationship represents the corresponding relationship between the battery discharge cycle number and the battery internal resistance threshold.
4. The method according to claim 2, characterized in that: The first corresponding relationship is determined in the following manner: The battery is discharged in cycles based on different temperature ranges, and the number of battery discharge cycles based on different temperature ranges and the discharge cut-off capacity of each cycle are recorded; Determining an available capacity loss rate threshold based on the discharge cut-off capacity and the preset capacity; Based on the available capacity loss rate threshold and the number of battery cycle discharges, determining initial first corresponding relationships corresponding to different temperature segments; The initial first corresponding relationship corresponding to the different temperature sections is fitted to obtain the first corresponding relationship.
5. The method according to claim 3, characterized in that: The second corresponding relationship is determined in the following manner: The battery is discharged in cycles based on different temperature ranges, and the number of battery discharge cycles based on different temperature ranges is recorded as well as the cut-off voltage, cut-off current and open circuit voltage of each cycle; Determining a battery internal resistance threshold based on the cut-off voltage, the cut-off current, and the open circuit voltage; Based on the battery internal resistance threshold and the battery discharge cycle number, determining the initial second corresponding relationships corresponding to different temperature sections; The initial second corresponding relationship corresponding to the different temperature sections is fitted to obtain the second corresponding relationship.
6. The method according to any one of claims 1 to 5, characterized in that The number of discharge cycles is determined in the following manner: In response to detecting that the battery discharge capacity is greater than a preset discharge capacity threshold, it is determined as one cycle discharge number.
7. A battery status detection device, characterized in that: include: An acquisition unit is used to obtain the current number of discharge cycles of the battery and the current lithium plating detection parameter value; A determination unit, configured to determine the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the corresponding relationship between the number of discharge cycles and the lithium deposition detection parameter threshold; The lithium deposition detection parameter threshold is a lithium deposition parameter value for determining that the lithium deposition state of the battery is a lithium deposition phenomenon under a corresponding number of cycle discharges.
8. The battery status detection device according to claim 7, characterized in that: The lithium plating detection parameter includes a battery available capacity loss rate, and the battery available capacity loss rate is determined based on the current discharge cut-off capacity and the preset capacity of the battery; The determining unit determines the lithium deposition state of the battery based on the current number of discharge cycles, the current lithium deposition detection parameter value, and the corresponding relationship between the number of discharge cycles and the lithium deposition detection parameter threshold value in the following manner: Determine a current available capacity loss rate threshold value corresponding to the current battery cycle number based on the current cycle discharge number and a first corresponding relationship, wherein the first corresponding relationship represents a corresponding relationship between the battery cycle discharge number and the available capacity loss rate threshold value; If the current available capacity loss rate is greater than the current available capacity loss rate threshold, it is determined that the battery lithium deposition state is a state where lithium deposition occurs.
9. The device according to claim 8, characterized in that The lithium plating detection parameters also include battery internal resistance; The determining unit is further used for: before determining that the lithium deposition state of the battery is a state where lithium deposition occurs: Based on the current battery discharge cycle number and a second corresponding relationship, a current battery internal resistance threshold corresponding to the current battery discharge cycle number is determined, and it is determined that the current battery internal resistance is less than the current battery internal resistance threshold, wherein the second corresponding relationship represents the corresponding relationship between the battery discharge cycle number and the battery internal resistance threshold.
10. The device according to claim 8, characterized in that The determining unit determines the first corresponding relationship in the following manner: The battery is discharged in cycles based on different temperature ranges, and the number of battery discharge cycles based on different temperature ranges and the discharge cut-off capacity of each cycle are recorded; Determining an available capacity loss rate threshold based on the discharge cut-off capacity and the preset capacity; Based on the available capacity loss rate threshold and the number of battery cycle discharges, determining initial first corresponding relationships corresponding to different temperature segments; The initial first corresponding relationship corresponding to the different temperature sections is fitted to obtain the first corresponding relationship.
11. The device according to claim 9, characterized in that The determining unit determines the second corresponding relationship in the following manner: The battery is discharged in cycles based on different temperature ranges, and the number of battery discharge cycles based on different temperature ranges is recorded as well as the cut-off voltage, cut-off current and open circuit voltage of each cycle; Determining a battery internal resistance threshold based on the cut-off voltage, the cut-off current, and the open circuit voltage; Based on the battery internal resistance threshold and the battery discharge cycle number, determining the initial second corresponding relationships corresponding to different temperature sections; The initial second corresponding relationship corresponding to the different temperature sections is fitted to obtain the second corresponding relationship.
12. The device according to any one of claims 7 to 11, characterized in that The acquisition unit determines the number of cycle discharges in the following manner: In response to detecting that the battery discharge capacity is greater than a preset discharge capacity threshold, it is determined as one cycle discharge number.
13. A battery status detection device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: execute the battery status detection method according to any one of claims 1-6.
14. A storage medium, characterized in that: The storage medium stores instructions, and when the instructions in the storage medium are executed by a processor of the terminal, the terminal is enabled to execute the method according to any one of claims 1 to 6.