Battery processing method and device, electronic equipment, storage medium and program product

Abstract

The invention relates to a battery processing method and device, electronic equipment, a storage medium and a program product, and the method comprises the steps: estimating the total discharge capacity of a battery when the battery reaches a shutdown voltage in a first charging and discharging period; under the condition that the total discharge capacity is out of a target range, determining the cumulative number of times of controlling charging and discharging of the battery based on the shutdown voltage; wherein the target range is determined based on a first discharge amount when the battery reaches a failure boundary in a second charge and discharge period; and determining a target discharge cut-off voltage based on the cumulative number of times, and controlling the battery to charge and discharge based on the target discharge cut-off voltage, thereby reducing the capacity loss of the battery, improving the problem that the battery is located at a failure boundary in the first charge and discharge period, prolonging the cycle service life of the battery, and improving the reliability of the battery. And the capacity retention ratio of the battery can also be ensured.

Description

Technical Field

[0001] This disclosure relates to the field of battery processing, and more particularly to a battery processing method, apparatus, electronic device, storage medium, and program product. Background Technology

[0002] With the development of battery technology, lithium batteries have become widely used in various electronic devices, such as mobile phones and tablets, due to their long battery life, low price, and high safety. As lithium batteries become more widely used, users have increasingly higher demands for them, such as wanting to improve capacity retention in the later stages of cycling and extend battery life.

[0003] Manufacturers have done a lot of work in modifying battery active materials, current collector thickness, and optimizing electrolyte composition, which has improved the high and low temperature performance of batteries. However, improving battery cycle life through chemical systems or processes has limited effectiveness.

[0004] In related technologies, while continuously reducing the discharge cutoff voltage during battery charge-discharge cycles can extend the battery's lifespan, it can also affect the capacity retention rate in the later stages of the cycle. Summary of the Invention

[0005] To overcome the problems in related technologies, this disclosure provides a battery processing method, apparatus, electronic device, storage medium, and program product, thereby reducing battery capacity loss and improving the problem of the battery being at the failure boundary during the first charge-discharge cycle. This not only extends the cycle life of the battery but also ensures the battery's capacity retention rate.

[0006] According to a first aspect of the present disclosure, a battery processing method is provided, comprising:

[0007] During the first charge / discharge cycle, estimate the total discharge amount when the battery reaches the shutdown voltage;

[0008] If the total discharge amount is outside the target range, determine the cumulative number of times the battery is charged and discharged based on the shutdown voltage; wherein the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle;

[0009] Based on the cumulative number of times, a target discharge cutoff voltage is determined, and the battery charging and discharging is controlled based on the target discharge cutoff voltage.

[0010] In some embodiments, determining the target discharge cutoff voltage based on the accumulated number of times includes:

[0011] Determine the voltage adjustment value corresponding to the cumulative number of times; wherein the voltage adjustment value and the cumulative number of times are positively correlated;

[0012] Based on the voltage adjustment value, the current discharge cutoff voltage is adjusted to obtain the target discharge cutoff voltage.

[0013] In some embodiments, determining the voltage adjustment value corresponding to the cumulative number of times includes:

[0014] If the cumulative number of times is greater than or equal to a preset threshold, a voltage adjustment value corresponding to the cumulative number of times is determined based on the correlation relationship and the cumulative number of times; wherein, the correlation relationship represents the mapping relationship between the cumulative number of times and the voltage adjustment value;

[0015] The step of adjusting the current discharge cutoff voltage based on the voltage adjustment value to obtain the target discharge cutoff voltage includes:

[0016] The target discharge cutoff voltage is obtained based on the sum of the voltage adjustment value and the current discharge cutoff voltage.

[0017] In some embodiments, the method further includes:

[0018] If the total discharge amount is within the target range, or the cumulative number of discharges is less than the preset number of discharges threshold, the battery charging and discharging is controlled based on the current discharge cutoff voltage.

[0019] In some embodiments, the method further includes:

[0020] Based on the first discharge amount and the lower limit of the preset range, a target lower limit is determined; wherein, the preset range is determined based on the cumulative discharge amount when the historical performance parameters of the battery reach the performance limit value;

[0021] Based on the first discharge amount and the upper limit of the preset range, a target upper limit value is determined;

[0022] The target range is determined based on the target lower limit and the target upper limit.

[0023] In some embodiments, the second charge / discharge cycle is the previous cycle adjacent to the first charge / discharge cycle.

[0024] In some embodiments, estimating the total discharge amount when the battery reaches the shutdown voltage during the first charge-discharge cycle includes:

[0025] During the first charge-discharge cycle, the current discharge parameters of the battery are obtained; wherein the discharge parameters include at least one of the following: discharge rate, discharge voltage, or battery temperature;

[0026] The total discharge amount is obtained based on the prediction model and the current discharge parameters;

[0027] The prediction model is determined by the battery's historical discharge parameters and the cumulative discharge amount at which the battery reaches a preset shutdown voltage under the historical discharge parameters.

[0028] According to a second aspect of the present disclosure, a battery processing apparatus is provided, comprising:

[0029] The estimation module is configured to estimate the total discharge amount of the battery when it reaches the shutdown voltage during the first charge-discharge cycle.

[0030] The first determining module is configured to determine the cumulative number of times the battery is charged and discharged based on the shutdown voltage when the total discharge amount is within the target range; wherein the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle;

[0031] The first execution module is configured to determine a target discharge cutoff voltage based on the accumulated number of times, and control the charging and discharging of the battery based on the target discharge cutoff voltage.

[0032] In some embodiments, the first execution module includes:

[0033] The second determining module is configured to determine a voltage adjustment value corresponding to the cumulative number of times; wherein the voltage adjustment value is positively correlated with the cumulative number of times.

[0034] The adjustment module is configured to adjust the current discharge cutoff voltage based on the voltage adjustment value to obtain the target discharge cutoff voltage.

[0035] In some embodiments, the second determining module is specifically configured as follows:

[0036] If the cumulative number of times is greater than or equal to a preset threshold, a voltage adjustment value corresponding to the cumulative number of times is determined based on the correlation relationship and the cumulative number of times; wherein, the correlation relationship represents the mapping relationship between the cumulative number of times and the voltage adjustment value;

[0037] The adjustment module is specifically configured as follows:

[0038] The target discharge cutoff voltage is obtained based on the sum of the voltage adjustment value and the current discharge cutoff voltage.

[0039] In some embodiments, the apparatus further includes:

[0040] The second execution module is configured to control the charging and discharging of the battery based on the current discharge cutoff voltage when the total discharge amount is within the target range or the cumulative number of discharges is less than the preset number of discharges threshold.

[0041] In some embodiments, the apparatus further includes:

[0042] The first calculation module is configured to determine a target lower limit value based on the first discharge amount and the lower limit value of a preset range; wherein, the preset range is determined based on the cumulative discharge amount when the historical performance parameters of the battery reach the performance limit value;

[0043] The second calculation module is configured to determine the target upper limit value based on the first discharge amount and the upper limit value of the preset range;

[0044] The third calculation module is configured to determine the target range based on the target lower limit and the target upper limit.

[0045] In some embodiments, the second charge / discharge cycle is the previous cycle adjacent to the first charge / discharge cycle.

[0046] In some embodiments, the estimation module is specifically configured as follows:

[0047] During the first charge-discharge cycle, the current discharge parameters of the battery are obtained; wherein the discharge parameters include at least one of the following: discharge rate, discharge voltage, or battery temperature;

[0048] The total discharge amount is obtained based on the prediction model and the current discharge parameters;

[0049] The prediction model is determined by the battery's historical discharge parameters and the cumulative discharge amount at which the battery reaches a preset shutdown voltage under the historical discharge parameters.

[0050] According to a third aspect of the present disclosure, an electronic device is provided, comprising:

[0051] processor;

[0052] Memory used to store computer programs or instructions;

[0053] The processor executes the computer program or instructions to implement the steps in any of the battery processing methods in the first aspect described above.

[0054] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, comprising:

[0055] When the computer program or instructions in the storage medium are executed by the processor, the steps in any of the battery processing methods in the first aspect described above are implemented.

[0056] According to a fifth aspect of the present disclosure, a computer program product is provided, including a computer program or instructions, which, when executed by a processor, implement the steps of any of the battery processing methods in the first aspect described above.

[0057] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0058] In this embodiment, the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge-discharge cycle. Therefore, the boundary value of the target range is related to the battery's performance parameters. When the total discharge amount is outside the target range, it is estimated that the battery is at the failure boundary in the first charge-discharge cycle. Then, the cumulative number of times the battery is controlled to charge and discharge based on the shutdown voltage is determined. Since the cumulative number of times is related to the battery's capacity loss, the target discharge cutoff voltage is obtained based on the cumulative number of times. Controlling the battery's charge and discharge based on the target discharge cutoff voltage can reduce the battery's capacity loss and improve the problem of the battery being at the failure boundary in the first charge-discharge cycle. This not only extends the battery's cycle life but also ensures the battery's capacity retention rate.

[0059] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0060] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0061] Figure 1 This is a flowchart illustrating a battery processing method according to an exemplary embodiment. Figure 1 .

[0062] Figure 2 This is a flowchart illustrating a battery processing method according to an exemplary embodiment. Figure 2 .

[0063] Figure 3 This is a flowchart illustrating a battery processing method according to an exemplary embodiment. Figure 3 .

[0064] Figure 4 This is a block diagram illustrating a battery processing apparatus according to an exemplary embodiment.

[0065] Figure 5 This is a structural block diagram of an electronic device 500 according to an exemplary embodiment. Detailed Implementation

[0066] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0067] Figure 1 This is a flowchart illustrating a battery processing method according to an exemplary embodiment. Figure 1 ,like Figure 1 As shown, the battery processing method mainly includes the following steps:

[0068] In step 101, during the first charge-discharge cycle, the total discharge amount when the battery reaches the shutdown voltage is estimated.

[0069] In step 102, if the total discharge amount is outside the target range, the cumulative number of times the battery is charged and discharged based on the shutdown voltage is determined; wherein, the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle;

[0070] In step 103, the target discharge cutoff voltage is determined based on the cumulative number of times, and the battery charging and discharging is controlled based on the target discharge cutoff voltage.

[0071] It should be noted that the battery processing method proposed in this disclosure can be applied to electronic devices. Here, electronic devices can include terminal devices, such as mobile terminals or fixed terminals. Mobile terminals can include devices such as mobile phones, tablets, laptops, and wearable electronic devices. Fixed terminals can include desktop computers, smart TVs, and in-vehicle devices. In some other embodiments, the battery processing method can also be applied to applications installed on electronic devices.

[0072] In other embodiments, the battery processing method of this disclosure can be configured in a battery processing device, which can be located in an electronic device; this disclosure does not limit this. It should be noted that the execution entity of this disclosure can be a central processing unit (CPU) in the electronic device in hardware, and related background services in the electronic device in software; this is not limited.

[0073] In some embodiments, the failure boundary of a battery may include a performance failure boundary and a safety failure boundary. The performance failure boundary includes battery capacity decay, short cycle life, poor rate performance, or high-temperature performance decay, etc. When the battery performance fails to meet the usage requirements and related indicators, the battery is determined to be at the performance failure boundary. The safety failure boundary includes battery thermal runaway, leakage, short circuit, or expansion deformation, etc. When the battery is used improperly or abused, and a failure with safety risks occurs, the battery is determined to be at the safety failure boundary.

[0074] In some embodiments, there are many factors that can cause a battery to be at the failure boundary. For example, the chemical substances inside the battery may be depleted, causing the battery to be unable to continue to provide sufficient electrical energy; the electrolyte of the battery may evaporate or dissolve, causing the battery to lose its ability to conduct ions, thus causing the battery to be at the failure boundary; in addition, over-discharging or under-discharging of the battery can also affect the performance and lifespan of the battery, thereby causing the battery to approach or be at the failure boundary.

[0075] Here, over-discharge causes the active materials inside the battery to harden, increasing the battery's internal resistance and significantly reducing its performance. At the same time, over-discharge accelerates the battery's aging process, reduces its cycle life, and thus shortens the overall battery life, exacerbating the battery's approach to the failure threshold.

[0076] Insufficient discharge results in an incompletely discharged battery, preventing the internal chemical reactions from proceeding fully and hindering the effective utilization of active materials, leading to a gradual loss of battery capacity. As battery capacity decreases, the battery requires frequent charging, which increases internal resistance during repeated charging. Therefore, insufficient discharge also accelerates battery aging, causing a decline in battery performance and bringing the battery close to or at the failure threshold.

[0077] Therefore, in this embodiment of the present disclosure, by first estimating the total discharge amount when the battery reaches the shutdown voltage during the first charge-discharge cycle, and based on the total discharge amount, determining whether the battery is close to or at the failure boundary, and adjusting the battery's discharge parameters in a timely manner, the cycle life of the battery is extended.

[0078] Here, the first charge-discharge cycle refers to the process of the battery discharging from a fully charged state to depletion of its charge, and then recharging it back to a fully charged state.

[0079] In some embodiments, the shutdown voltage is set by the device manufacturer based on battery characteristics and device requirements; therefore, the shutdown voltage may vary between different electronic devices or different battery types. In battery-powered electronic devices, the device automatically shuts down when the battery's discharge voltage drops to the shutdown voltage to protect the battery and the device itself from damage. In other words, the shutdown voltage is set below or equal to the battery's discharge cutoff voltage to ensure that the electronic device can safely shut down when the battery is about to be depleted and to reduce battery damage caused by over-discharge.

[0080] Here, the discharge cutoff voltage refers to the lowest operating voltage value at which the battery should no longer discharge when the discharge voltage drops during discharge. If the battery continues to discharge after reaching the discharge cutoff voltage, it may cause irreversible chemical reactions inside the battery, thereby damaging the battery and shortening its lifespan.

[0081] Therefore, by estimating the total discharge amount when the battery reaches the shutdown voltage, the maximum discharge amount of the battery in the first charge-discharge cycle can be determined, which helps to improve the reliability and accuracy of determining the battery's position at the failure boundary.

[0082] In some embodiments, the total discharge capacity of a battery during the first charge-discharge cycle can be estimated using the battery's discharge rate. The maximum discharge capacity (rated capacity) that the battery can release under specific conditions (e.g., standard ambient temperature, standard discharge current, etc.) is determined, and the battery's discharge rate is determined using the battery's discharge current and rated capacity. Based on the discharge rate and inverse proportionality, the battery's discharge time is obtained. Finally, the estimated total discharge capacity is obtained based on the product of the discharge time and the rated capacity.

[0083] In other embodiments, the Battery Management System (BMS) monitors battery discharge parameters in real time, such as discharge voltage, discharge current, and battery temperature during discharge, and records historical charge and discharge data, such as the initial and final charge / discharge amounts and charging time for each cycle. Using this historical data, the BMS can calculate the battery's average discharge amount and discharge rate, thus obtaining its historical discharge characteristics. In practical applications, the BMS predicts the total discharge amount of the battery within a single charge / discharge cycle based on real-time discharge parameters and historical discharge characteristics.

[0084] It should be noted that, considering the possibility of over-discharge or under-discharge before the first charge-discharge cycle, which may cause the battery to reach the failure boundary and lead to a decline in battery performance parameters, to improve the accuracy of determining whether the battery is at the failure boundary during the first charge-discharge cycle, a target range can be determined based on the first discharge amount when the battery reaches the failure boundary during the second charge-discharge cycle. Then, based on the estimated total discharge and the target range, it can be determined whether the battery is at the failure boundary.

[0085] Here, since the target range is determined based on the first discharge amount when the battery reaches the failure boundary during the second charge-discharge cycle, the second charge-discharge cycle is the charge-discharge cycle prior to the first charge-discharge cycle.

[0086] In addition, the first discharge amount can be determined by the cumulative discharge amount when the battery reaches the failure boundary in any charge-discharge cycle before the first charge-discharge cycle, or by multiple cumulative discharge amounts when the battery reaches the failure boundary before the first charge-discharge cycle. This disclosure does not limit this.

[0087] In some embodiments, the target range is calculated from the first discharge quantity and the first range. A first upper limit value is obtained based on the upper limit value of the first discharge quantity and the first range; and a first lower limit value is obtained based on the lower limit value of the first discharge quantity and the first range; and the target range is determined based on the first upper limit value and the first lower limit value.

[0088] In other embodiments, a pre-defined association between different first discharge quantities and different target ranges is set. Based on the association and the first discharge quantity, the target range corresponding to the first discharge quantity is determined to improve the efficiency and accuracy of determining the target range.

[0089] Understandably, since the target range is determined based on the first discharge amount, the boundary value of the target range represents the discharge amount when the battery's performance parameters are close to or reach the limit value. When the total discharge amount is within the target range, it is determined that the battery's discharge amount in the first charge-discharge cycle is in a normal state, which will not accelerate the aging of the battery, thus ensuring the battery's cycle life. However, when the total discharge amount is outside the target range, it is determined that the battery's discharge amount in the first charge-discharge cycle is in an abnormal state, that is, the battery is in an over-discharged state or an under-discharged state, which is not conducive to improving the battery's cycle life and capacity retention rate.

[0090] Therefore, when the total discharge is outside the target range, the target discharge cutoff voltage of the battery in the first charge-discharge cycle can be redefined, and the battery can be controlled to charge and discharge according to the target discharge cutoff voltage, so that the battery is in a normal discharge state, thereby extending the battery's cycle life and improving the capacity retention rate.

[0091] Based on the above, when a battery discharges to its shutdown voltage, it has actually approached or exceeded its discharge cutoff voltage. Continuing to discharge further will lead to over-discharge. Over-discharge causes irreversible chemical reactions within the battery, such as structural damage to the positive electrode material and lithium deposition in the negative electrode material. These processes accelerate the battery's aging process and are detrimental to extending its cycle life. Furthermore, consistently discharging the battery to its shutdown voltage over a long period will gradually reduce its reversible capacity, meaning the amount of electricity the battery can store and release will gradually decrease. This is because over-discharge causes the battery to lose some active material, reducing its overall capacity.

[0092] Therefore, in order to determine the accurate target discharge cutoff voltage, the cumulative number of times the battery is charged and discharged based on the shutdown voltage can be obtained before the first charge and discharge cycle. Based on the cumulative number of times, the degree of battery aging can be determined, so as to further determine the target discharge cutoff voltage.

[0093] Understandably, when the number of accumulated discharge cycles is too high, it indicates a significant decrease in battery capacity before the first charge-discharge cycle. To improve capacity retention, a larger target discharge cutoff voltage can be set to reduce the total discharge amount within the first charge-discharge cycle. Conversely, when the number of accumulated discharge cycles is too low, it indicates a lower decrease in battery capacity before the first charge-discharge cycle. To improve battery cycle life, a smaller target discharge cutoff voltage can be set to increase the total discharge amount within the first charge-discharge cycle.

[0094] In some embodiments, a correlation between a preset number of times and a target discharge cutoff voltage can be established in advance. After obtaining the cumulative number of times, the preset number of times in which the cumulative number of times falls is determined. Based on the correlation and the preset number of times in which the cumulative number of times falls, the corresponding target discharge cutoff voltage is obtained.

[0095] In other embodiments, a correlation can be established between a preset number range and a voltage adjustment value. After obtaining the cumulative number of times, the preset number range in which the cumulative number of times falls is determined. Based on the correlation and the preset number range in which the cumulative number of times falls, the corresponding voltage adjustment value is obtained. Finally, the discharge cutoff voltage corresponding to the first charge-discharge cycle is adjusted based on the voltage adjustment value to obtain the target discharge cutoff voltage.

[0096] In related technologies, by lowering the discharge cutoff voltage once or multiple times during battery charge-discharge cycles, the battery releases less capacity at the same rated capacity, i.e., reducing the depth of discharge. This increases the number of charge-discharge cycles the battery can undergo, thereby extending its lifespan. However, at low discharge cutoff voltages, the internal chemical reactions and ion transport of the battery become less active, leading to increased internal resistance. Increased internal resistance consumes more electrical energy, thus reducing the battery's usable capacity and capacity retention rate.

[0097] In this embodiment of the present disclosure, it is possible to predict whether the battery is at the failure boundary during the first charge-discharge cycle. If it is predicted that the battery is at the failure boundary during the first charge-discharge cycle, the cumulative number of charge-discharge cycles of the battery is controlled according to the shutdown voltage to obtain the target discharge cutoff voltage, so as to reduce the situation where the battery is at the failure boundary, thereby improving the battery's performance and capacity retention rate.

[0098] In this embodiment, the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge-discharge cycle. Therefore, the boundary value of the target range is related to the battery's performance parameters. When the total discharge amount is outside the target range, it is estimated that the battery is at the failure boundary in the first charge-discharge cycle. Then, the cumulative number of times the battery is controlled to charge and discharge based on the shutdown voltage is determined. Since the cumulative number of times is related to the battery's capacity loss, the target discharge cutoff voltage is obtained based on the cumulative number of times. Controlling the battery's charge and discharge based on the target discharge cutoff voltage can reduce the battery's capacity loss and improve the problem of the battery being at the failure boundary in the first charge-discharge cycle. This not only extends the battery's cycle life but also ensures the battery's capacity retention rate.

[0099] Figure 2 This is a flowchart illustrating a battery processing method according to an exemplary embodiment. Figure 2 ,like Figure 2 As shown, the battery processing method mainly includes the following steps:

[0100] In step 201, during the first charge-discharge cycle, the total discharge amount when the battery reaches the shutdown voltage is estimated.

[0101] In step 202, if the total discharge amount is outside the target range, the cumulative number of times the battery is charged and discharged based on the shutdown voltage is determined; wherein, the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle;

[0102] In step 203, a voltage adjustment value corresponding to the cumulative count is determined; wherein the voltage adjustment value and the cumulative count are positively correlated.

[0103] In step 204, the current discharge cutoff voltage is adjusted based on the voltage adjustment value to obtain the target discharge cutoff voltage, and the battery charging and discharging is controlled based on the target discharge cutoff voltage.

[0104] Understandably, to quickly and accurately obtain the target discharge cutoff voltage, a voltage adjustment value corresponding to the number of accumulated cycles can be determined first. Based on the current discharge cutoff voltage and the voltage adjustment value, the target discharge cutoff voltage can then be obtained. Since the number of accumulated cycles is positively correlated with battery capacity loss, to improve battery capacity retention, the voltage adjustment value can be set to be positively correlated with the number of accumulated cycles.

[0105] Here, the current discharge cutoff voltage is the discharge cutoff voltage corresponding to the first charge-discharge cycle. The discharge cutoff voltages for different charge-discharge cycles may be the same or different; this disclosure does not limit this.

[0106] In some embodiments, when the cumulative number of cycles is large, it is determined that the battery capacity decreases significantly before the first charge-discharge cycle. In order to improve the capacity retention rate, the voltage adjustment value can be set to a larger value, and the current discharge cutoff voltage can be adjusted based on the voltage adjustment value to obtain a target discharge cutoff voltage that is larger than the current discharge cutoff voltage, thereby reducing the amount of discharge in the first charge-discharge cycle.

[0107] In other embodiments, when the cumulative number of cycles is small, it is determined that the battery capacity decreases less before the first charge-discharge cycle. In order to improve the battery's cycle life, the voltage adjustment value can be set to a smaller value or a negative value. Based on the voltage adjustment value, the current discharge cutoff voltage is adjusted to obtain a target discharge cutoff voltage that is smaller than the current discharge cutoff voltage, thereby appropriately increasing the battery's discharge amount in the first charge-discharge cycle.

[0108] In this embodiment of the disclosure, the current discharge cutoff voltage is adjusted by the voltage adjustment value corresponding to the cumulative number of times to obtain the target discharge cutoff voltage. This is beneficial for obtaining an accurate target discharge cutoff voltage. By intelligently adjusting the current discharge cutoff voltage, the battery's capacity retention rate can be improved while ensuring the battery's cycle life.

[0109] In some embodiments, determining the voltage adjustment value corresponding to the cumulative number of times includes:

[0110] If the cumulative number of times is greater than or equal to a preset threshold, the voltage adjustment value corresponding to the cumulative number of times is determined based on the correlation and the cumulative number of times; wherein, the correlation represents the mapping relationship between the cumulative number of times and the voltage adjustment value;

[0111] Based on the voltage adjustment value, the current discharge cutoff voltage is adjusted to obtain the target discharge cutoff voltage, including:

[0112] The target discharge cutoff voltage is obtained by summing the voltage adjustment value and the current discharge cutoff voltage.

[0113] It should be noted that, in order to improve the battery's capacity retention rate, a preset number of times threshold is set in advance. After obtaining the cumulative number of times, the cumulative number of times is compared with the preset number of times threshold. If the cumulative number of times is greater than or equal to the preset number of times threshold, it is determined that the battery has lost a lot of capacity. At this time, it is determined that the current discharge cutoff voltage needs to be adjusted to reduce the amount of discharge of the battery in the first charge and discharge cycle.

[0114] Here, the preset number of times threshold is related to the battery's performance parameters. For example, it can be set to 10 times or 20 times, etc. This disclosure does not limit this.

[0115] Understandably, in order to quickly determine the voltage adjustment value, a correlation between the cumulative number of times and the voltage adjustment value is established in advance. When the cumulative number of times is greater than or equal to a preset threshold, the corresponding voltage adjustment value is obtained based on the cumulative number of times and the correlation, thereby obtaining an accurate target discharge cutoff voltage.

[0116] Here, in order to improve the efficiency of determining the target discharge cutoff voltage, after obtaining the voltage adjustment value, the sum of the voltage adjustment value and the current discharge cutoff voltage is directly calculated to obtain the target discharge cutoff voltage.

[0117] For example, the cumulative count is positively correlated with the voltage adjustment value. In the correlation, a voltage adjustment value of 0.05 mV corresponds to 20 cumulative counts, and a voltage adjustment value of 0.1 mV corresponds to 30 cumulative counts. After obtaining the cumulative counts before the first charge / discharge cycle, the corresponding voltage adjustment value is determined based on the correlation. Here, if the cumulative count before the first charge / discharge cycle is 25, and there are no identical cumulative counts based on the correlation, the voltage adjustment value corresponding to a cumulative count of 25 can be determined based on the voltage adjustment values ​​corresponding to cumulative counts of 20 and 30, for example, it could be 0.075 mV.

[0118] In this embodiment of the disclosure, when the cumulative number of times is greater than or equal to a preset number threshold, a voltage adjustment value corresponding to the cumulative number of times is determined based on the correlation and the cumulative number of times. The target discharge cutoff voltage is obtained based on the sum of the voltage adjustment value and the current discharge cutoff voltage. This can improve the efficiency and accuracy of determining the target discharge cutoff voltage, thereby improving the safety performance of the battery.

[0119] In some embodiments, the method further includes:

[0120] When the total discharge amount is within the target range, or the cumulative number of discharges is less than the preset number of discharges threshold, the battery charging and discharging are controlled based on the current discharge cutoff voltage.

[0121] Understandably, when the total discharge is within the target range, it is determined that the discharge of the battery in the first charge-discharge cycle is in a normal state, which will not accelerate the aging of the battery and can ensure the cycle life of the battery. The battery charge-discharge can be controlled directly based on the current discharge cutoff voltage without the need to obtain the cumulative number of cycles.

[0122] It should be noted that if the total discharge amount is outside the target range, it can be preliminarily determined that the battery's discharge amount may be in an abnormal state. To further verify whether the battery is at the failure boundary, the cumulative number of times the battery is charged and discharged based on the shutdown voltage before the first charge and discharge cycle can be obtained to determine the battery's capacity loss. If the cumulative number is less than the preset threshold, it is determined that the battery's capacity loss is small. Controlling the battery's charge and discharge based on the current discharge cutoff voltage can ensure the battery's cycle life. In this case, there is no need to determine a voltage adjustment value, reducing the possibility of ineffective voltage adjustment value determination.

[0123] In this embodiment, when the total discharge amount is within the target range, it is determined that the total discharge amount is in a normal state and the battery has not reached the failure boundary within the first charge-discharge cycle. Therefore, the battery charge-discharge is controlled based on the current discharge cutoff voltage to improve the battery's cycle life. Simultaneously, when the cumulative number of discharge cycles is less than a preset threshold, it is determined that the battery's capacity loss before the first charge-discharge cycle is minimal. Therefore, the battery charge-discharge is controlled based on the current discharge cutoff voltage, which can ensure the battery's cycle life while reducing the occurrence of invalid voltage adjustment values.

[0124] In some embodiments, the method further includes:

[0125] The target lower limit is determined based on the first discharge amount and the lower limit of the preset range; wherein, the preset range is determined based on the cumulative discharge amount when the battery's historical performance parameters reach the performance limit value.

[0126] Based on the first discharge amount and the upper limit of the preset range, determine the target upper limit value;

[0127] The target range is determined based on the target lower limit and the target upper limit.

[0128] Understandably, in order to facilitate the calculation of the target range, a preset range can be obtained in advance. After determining the first discharge quantity, the lower limit of the first discharge quantity and the preset range is calculated to obtain the target lower limit value. Then, the upper limit of the first discharge quantity and the preset range is calculated to obtain the target upper limit value. Finally, the target range is determined based on the target lower limit value and the target upper limit value.

[0129] Here, the preset range refers to the cumulative discharge capacity of multiple battery groups when their historical performance parameters reach their maximum performance limit, and the cumulative discharge capacity of multiple battery groups when their historical performance parameters reach their minimum performance limit, obtained by the battery manufacturer based on experimental or empirical data at the time of battery delivery. The cumulative discharge capacity of each group is then normalized to determine the proportional relationship between the cumulative discharge capacity of each group and the rated capacity of the battery, thereby obtaining the upper and lower limits of the preset range.

[0130] For example, the rated capacity of the battery is 1000 mAh, and the preset range can be 0.2 to 0.8. If the first discharge capacity is 950 mAh, then the target range is 190 to 760 mAh.

[0131] In this embodiment of the disclosure, a preset range is determined by the cumulative discharge amount when the battery's historical performance parameters reach the performance limit. After obtaining the first discharge amount, the target range is calculated directly based on the first discharge amount and the preset range, thereby improving the accuracy and efficiency of determining the target range.

[0132] In some embodiments, the second charge / discharge cycle is the previous cycle adjacent to the first charge / discharge cycle.

[0133] It should be noted that, considering that the performance parameters of the battery will change in each charge and discharge cycle, in order to further improve the accuracy of determining the target range, the first discharge amount is the discharge amount when the battery reaches the failure boundary in the previous cycle adjacent to the first charge and discharge cycle. In this way, the calculated target range matches the changes in the battery's performance parameters, thereby improving the accuracy of determining that the battery is at the failure boundary.

[0134] In some embodiments, if the battery does not reach the failure boundary within the first charge-discharge cycle from the time it leaves the factory, the second charge-discharge cycle is the charge-discharge cycle in which the battery manufacturer conducts performance testing experiments on the same type of battery before the battery leaves the factory, and the first discharge amount is the cumulative discharge amount when the historical performance parameters of the battery reach the maximum performance limit value during the performance testing experiment.

[0135] In this embodiment of the disclosure, in order to improve the accuracy of the battery being located at the failure boundary during the first charge-discharge cycle, the target range can be determined based on the first discharge amount when the battery reaches the failure boundary in the previous cycle adjacent to the first charge-discharge cycle, so that the calculated target range matches the changes in the battery's performance parameters.

[0136] Figure 3 This is a flowchart illustrating a battery processing method according to an exemplary embodiment. Figure 3 ,like Figure 3 As shown, the battery processing method mainly includes the following steps:

[0137] In step 301, during the first charge-discharge cycle, the current discharge parameters of the battery are acquired; wherein the discharge parameters include at least one of the following: discharge rate, discharge voltage, or battery temperature;

[0138] In step 302, the total discharge amount is obtained based on the prediction model and the current discharge parameters; wherein, the prediction model is determined by the battery's historical discharge parameters and the cumulative discharge amount at which the battery reaches the preset shutdown voltage under the historical discharge parameters.

[0139] In step 303, if the total discharge amount is outside the target range, the cumulative number of times the battery is charged and discharged based on the shutdown voltage is determined; wherein, the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle;

[0140] In step 304, the target discharge cutoff voltage is determined based on the cumulative number of times, and the battery charging and discharging is controlled based on the target discharge cutoff voltage.

[0141] It should be noted that, in order to further improve the accuracy of the estimated total discharge, a prediction model is first obtained based on the battery's historical discharge parameters and the cumulative discharge amount when the battery reaches the preset shutdown voltage under the historical discharge parameters. Then, based on the prediction model, the total discharge amount when the battery reaches the shutdown voltage in the first charge-discharge cycle is predicted.

[0142] Here, historical discharge parameters include the battery's discharge rate, discharge temperature, and discharge time before the first charge-discharge cycle. These historical discharge parameters reflect the battery's discharge behavior under non-discharge conditions. Simultaneously, the total amount of electricity discharged from a fully charged state to the preset shutdown voltage under these historical discharge parameters is defined as the cumulative discharge amount.

[0143] In some embodiments, historical discharge parameters and corresponding cumulative discharge amounts are obtained as training data, and a predictive model that can predict the total discharge amount of the battery under different discharge parameters is established through machine learning or statistical methods.

[0144] Understandably, the prediction model can capture the relationship between the battery's discharge parameters and the cumulative discharge amount when the battery reaches the shutdown voltage. After obtaining the battery's current discharge parameters, the current discharge parameters are input into the prediction model, and the prediction model can predict the battery's total discharge amount under the current discharge conditions.

[0145] In practical applications, the prediction model can be updated and calibrated regularly to ensure that it accurately reflects the current discharge behavior of the battery.

[0146] In some embodiments, if the battery has already released some charge during the first charge-discharge cycle before obtaining the current discharge parameters of the battery, then before estimating the total discharge amount, the remaining charge of the battery can be obtained first to obtain the charge released by the battery; then the current discharge parameters can be obtained, and the estimated discharge amount of the battery can be obtained based on the prediction model and the current discharge parameters; finally, the estimated total discharge amount can be obtained based on the charge released and the estimated discharge amount.

[0147] In this embodiment of the present disclosure, after obtaining the current discharge parameters of the battery during the first charge-discharge cycle, the total discharge amount is obtained based on the prediction model and the current discharge parameters, which helps to improve the reliability and accuracy of the estimated total discharge amount.

[0148] Figure 4 This is a block diagram illustrating a battery processing apparatus according to an exemplary embodiment, such as... Figure 4 As shown, the battery processing device 400 includes:

[0149] The estimation module 401 is configured to estimate the total discharge amount of the battery when it reaches the power-off voltage during the first charge-discharge cycle.

[0150] The first determining module 402 is configured to determine the cumulative number of times the battery is charged and discharged based on the shutdown voltage when the total discharge amount is within the target range; wherein the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle;

[0151] The first execution module 403 is configured to determine a target discharge cutoff voltage based on the accumulated number of times, and to control the charging and discharging of the battery based on the target discharge cutoff voltage.

[0152] In some embodiments, the first execution module 403 includes:

[0153] The second determining module is configured to determine a voltage adjustment value corresponding to the cumulative number of times; wherein the voltage adjustment value is positively correlated with the cumulative number of times.

[0154] The adjustment module is configured to adjust the current discharge cutoff voltage based on the voltage adjustment value to obtain the target discharge cutoff voltage.

[0155] In some embodiments, the second determining module is specifically configured as follows:

[0156] If the cumulative number of times is greater than or equal to a preset threshold, a voltage adjustment value corresponding to the cumulative number of times is determined based on the correlation relationship and the cumulative number of times; wherein, the correlation relationship represents the mapping relationship between the cumulative number of times and the voltage adjustment value;

[0157] The adjustment module is specifically configured as follows:

[0158] The target discharge cutoff voltage is obtained based on the sum of the voltage adjustment value and the current discharge cutoff voltage.

[0159] In some embodiments, the device 400 further includes:

[0160] The second execution module is configured to control the charging and discharging of the battery based on the current discharge cutoff voltage when the total discharge amount is within the target range or the cumulative number of discharges is less than the preset number of discharges threshold.

[0161] In some embodiments, the device 400 further includes:

[0162] The first calculation module is configured to determine a target lower limit value based on the first discharge amount and the lower limit value of a preset range; wherein, the preset range is determined based on the cumulative discharge amount when the historical performance parameters of the battery reach the performance limit value;

[0163] The second calculation module is configured to determine the target upper limit value based on the first discharge amount and the upper limit value of the preset range;

[0164] The third calculation module is configured to determine the target range based on the target lower limit and the target upper limit.

[0165] In some embodiments, the second charge / discharge cycle is the previous cycle adjacent to the first charge / discharge cycle.

[0166] In some embodiments, the estimation module 401 is specifically configured as follows:

[0167] During the first charge-discharge cycle, the current discharge parameters of the battery are obtained; wherein the discharge parameters include at least one of the following: discharge rate, discharge voltage, or battery temperature;

[0168] The total discharge amount is obtained based on the prediction model and the current discharge parameters;

[0169] The prediction model is determined by the battery's historical discharge parameters and the cumulative discharge amount at which the battery reaches a preset shutdown voltage under the historical discharge parameters.

[0170] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0171] Figure 5This is a structural block diagram illustrating an electronic device 500 according to an exemplary embodiment. For example, the electronic device 500 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0172] Reference Figure 5 The electronic device 500 may include one or more of the following components: processing component 502, memory 504, power supply component 506, multimedia component 508, audio component 510, input / output (I / O) interface 512, sensor component 514, and communication component 516.

[0173] Processing component 502 typically controls the overall operation of electronic device 500, such as operations associated with at least one of display, telephone call, data communication, camera operation, and recording operation. Processing component 502 may include one or more processors 520 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.

[0174] Memory 504 is configured to store various types of data to support the operation of electronic device 500. Examples of such data include at least one of the following: instructions for any application or method operating on electronic device 500, contact data, phonebook data, messages, pictures, and videos. Memory 504 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 storage, flash memory, magnetic disk, or optical disk.

[0175] Power supply component 506 provides power to various components of electronic device 500. Power supply component 506 may include at least one of the following: a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 500.

[0176] Multimedia component 508 includes a screen that provides an output interface between electronic device 500 and 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 touchscreen to receive input signals from the user. The Touch Panel includes one or more touch sensors to sense touches, swipes, and gestures on the Touch Panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 508 includes a front-facing camera and / or a rear-facing camera. When electronic device 500 is in an operating mode, such as a shooting mode or video mode, the front-facing camera and / or rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0177] Audio component 510 is configured to output and / or input audio signals. For example, audio component 510 includes a microphone (MIC) configured to receive external audio signals when electronic device 500 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 504 or transmitted via communication component 516. In some embodiments, audio component 510 also includes a speaker for outputting audio signals.

[0178] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, and buttons. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0179] Sensor assembly 514 includes one or more sensors for providing state assessments of various aspects of electronic device 500. For example, sensor assembly 514 may detect the on / off state of electronic device 500, the relative positioning of components such as the display and keypad of electronic device 500, changes in position of electronic device 500 or one of its components, the presence or absence of user contact with electronic device 500, orientation or acceleration / deceleration of electronic device 500, and temperature changes of electronic device 500. Sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 514 may also include an optical sensor, such as a complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) image sensor, for use in imaging applications. In some embodiments, sensor assembly 514 may also include, but is not limited to, at least one of the following: an accelerometer, a gyroscope, a magnetometer, a pressure sensor, and a temperature sensor.

[0180] Communication component 516 is configured to facilitate wired or wireless communication between electronic device 500 and other devices. Electronic device 500 can access wireless networks based on communication standards, such as Wi-Fi, 4G, 5G, or combinations thereof. In one exemplary embodiment, communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 516 also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wide Band (UWB), Bluetooth (BT), and other technologies.

[0181] In an exemplary embodiment, the electronic device 500 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.

[0182] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including executable instructions or a computer program, which can be executed by a processor 520 of an electronic device 500 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, floppy disk, and optical data storage device, etc.

[0183] A non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to perform any of the battery processing methods described above in the embodiments of this disclosure. For example, the method includes:

[0184] During the first charge / discharge cycle, estimate the total discharge amount when the battery reaches the shutdown voltage;

[0185] When the total discharge amount is outside the target range, the cumulative number of battery charge and discharge cycles controlled based on the shutdown voltage is determined; wherein, the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle;

[0186] Based on the cumulative number of discharge cycles, the target discharge cutoff voltage is determined, and the battery charging and discharging are controlled based on the target discharge cutoff voltage.

[0187] This disclosure provides a computer program product comprising a computer program or executable instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer program or executable instructions from the computer-readable storage medium and executes the computer program or executable instructions, causing the computer device to perform any of the battery processing methods described above in this disclosure.

[0188] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0189] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery processing method, characterized in that, The method includes: During the first charge / discharge cycle, estimate the total discharge amount when the battery reaches the shutdown voltage; If the total discharge amount is outside the target range, determine the cumulative number of times the battery is charged and discharged based on the shutdown voltage; wherein the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle; Based on the cumulative number of times, a target discharge cutoff voltage is determined, and the battery charging and discharging is controlled based on the target discharge cutoff voltage.

2. The method according to claim 1, characterized in that, Determining the target discharge cutoff voltage based on the accumulated number of discharges includes: Determine the voltage adjustment value corresponding to the cumulative number of times; wherein the voltage adjustment value and the cumulative number of times are positively correlated; Based on the voltage adjustment value, the current discharge cutoff voltage is adjusted to obtain the target discharge cutoff voltage.

3. The method according to claim 2, characterized in that, Determining the voltage adjustment value corresponding to the cumulative number of times includes: If the cumulative number of times is greater than or equal to a preset threshold, a voltage adjustment value corresponding to the cumulative number of times is determined based on the correlation relationship and the cumulative number of times; wherein, the correlation relationship represents the mapping relationship between the cumulative number of times and the voltage adjustment value; The step of adjusting the current discharge cutoff voltage based on the voltage adjustment value to obtain the target discharge cutoff voltage includes: The target discharge cutoff voltage is obtained based on the sum of the voltage adjustment value and the current discharge cutoff voltage.

4. The method according to claim 3, characterized in that, The method further includes: If the total discharge amount is within the target range, or the cumulative number of discharges is less than the preset number of discharges threshold, the battery charging and discharging is controlled based on the current discharge cutoff voltage.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Based on the first discharge amount and the lower limit of the preset range, a target lower limit is determined; wherein, the preset range is determined based on the cumulative discharge amount when the historical performance parameters of the battery reach the performance limit value; Based on the first discharge amount and the upper limit of the preset range, a target upper limit value is determined; The target range is determined based on the target lower limit and the target upper limit.

6. The method according to claim 5, characterized in that, The second charge / discharge cycle is the previous cycle adjacent to the first charge / discharge cycle.

7. The method according to any one of claims 1 to 4, characterized in that, The estimated total discharge amount when the battery reaches the shutdown voltage during the first charge / discharge cycle includes: During the first charge-discharge cycle, the current discharge parameters of the battery are obtained; wherein the discharge parameters include at least one of the following: discharge rate, discharge voltage, or battery temperature; The total discharge amount is obtained based on the prediction model and the current discharge parameters; The prediction model is determined by the battery's historical discharge parameters and the cumulative discharge amount at which the battery reaches a preset shutdown voltage under the historical discharge parameters.

8. A battery processing device, characterized in that, The device includes: The estimation module is configured to estimate the total discharge amount of the battery when it reaches the shutdown voltage during the first charge-discharge cycle. The first determining module is configured to determine the cumulative number of times the battery is charged and discharged based on the shutdown voltage when the total discharge amount is within the target range; wherein the target range is determined based on the first discharge amount when the battery reaches the failure boundary in the second charge and discharge cycle; The first execution module is configured to determine a target discharge cutoff voltage based on the accumulated number of times, and control the charging and discharging of the battery based on the target discharge cutoff voltage.

9. An electronic device, characterized in that, include: processor; Memory used to store computer programs or instructions; The processor executes the computer program or instructions to implement the steps of the method according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium storing a computer program or instructions, characterized in that, When the computer program or instructions in the storage medium are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

11. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by a processor, they implement the steps of the method according to any one of claims 1 to 7.

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