CN116359754A - Method and device for monitoring battery state - Google Patents
Method and device for monitoring battery state Download PDFInfo
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- CN116359754A CN116359754A CN202111629198.6A CN202111629198A CN116359754A CN 116359754 A CN116359754 A CN 116359754A CN 202111629198 A CN202111629198 A CN 202111629198A CN 116359754 A CN116359754 A CN 116359754A
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 239000000126 substance Substances 0.000 claims abstract description 54
- 230000008859 change Effects 0.000 claims description 35
- 238000005070 sampling Methods 0.000 claims description 19
- 238000012806 monitoring device Methods 0.000 claims description 10
- 238000012790 confirmation Methods 0.000 claims description 9
- 230000010354 integration Effects 0.000 claims description 9
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3828—Arrangements for monitoring battery or accumulator variables, e.g. SoC using current integration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The disclosure provides a battery state monitoring method, a device, electronic equipment and a storage medium, and relates to the technical field of battery detection, wherein the method comprises the following steps: determining that a battery of the terminal equipment enters a standing mode, and collecting discharge voltage and discharge current of the battery in the standing mode; determining the maximum chemical capacity and depth of discharge of the battery based on the collected discharge voltage and discharge current; the remaining capacity and usable full charge capacity of the battery are updated based on the maximum chemical capacity and depth of discharge. The terminal equipment in the present disclosure can determine whether the battery enters a standing mode or not in an uncharged state, and further can perform a battery learning process, update the residual capacity and the usable full charge capacity based on the actual discharge voltage and discharge current collected in the standing mode, and can reflect the state of the battery in real time, so that the user experience is prevented from being reduced due to accumulation of electric quantity errors.
Description
Technical Field
The disclosure relates to the technical field of battery detection, and in particular relates to a battery state monitoring method, a device, electronic equipment and a storage medium.
Background
With the continuous development of communication technology, mobile phones become an indispensable tool for people, and with the increasing functions of mobile phones, for example: stock, news, weather, traffic, merchandise, application downloads, music picture downloads, etc., and thus, the frequency of use of mobile phones is increasing. The electric quantity of the mobile phone battery is continuously changed due to loss and other reasons in the using process, so that the electric quantity of the mobile phone battery needs to be updated.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.
To this end, an object of the present disclosure is to propose a method of monitoring a battery state.
A second object of the present disclosure is to provide a battery state monitoring device.
A third object of the present disclosure is to propose an electronic device.
A fourth object of the present disclosure is to propose a non-transitory computer readable storage medium.
A fifth object of the present disclosure is to propose a computer programme product.
To achieve the above object, an embodiment of a first aspect of the present disclosure provides a method for monitoring a battery status, including: determining that a battery of a terminal device enters a standing mode, and collecting discharge voltage and discharge current of the battery in the standing mode; determining a maximum chemical capacity and depth of discharge of the battery based on the collected discharge voltage and discharge current; the remaining capacity and usable full charge capacity of the battery are updated based on the maximum chemical capacity and the depth of discharge.
According to one embodiment of the present disclosure, the method for monitoring a battery state further includes: acquiring the cut-off discharge depth, the discharge depth and the maximum chemical capacitance of the battery, and updating the battery to determine an updated target; and acquiring the discharge electric quantity of the battery, and updating the battery according to the target, the discharge electric quantity and the discharge depth to determine an updated target.
According to one embodiment of the present disclosure, the method for monitoring a battery state further includes: coulomb integration is carried out on the collected discharge current to obtain the discharge electric quantity of the battery; the maximum chemical capacity is determined based on the amount of discharge, an initial depth of discharge of the battery, and the depth of discharge.
According to one embodiment of the disclosure, the coulomb integration of the collected discharge current to obtain the discharge electricity of the battery includes: acquiring a voltage change rate of the battery in the standing mode based on the acquired discharge voltage; comparing the voltage change rate with a set change rate threshold value, and determining whether the voltage change rate is smaller than the set change rate threshold value; and if so, starting the step of carrying out coulomb integration on the collected discharge current to obtain the discharge electric quantity of the battery.
According to one embodiment of the present disclosure, the acquiring, based on the collected discharge voltage, a voltage change rate of the battery in the stationary mode includes: determining whether the battery is in a voltage stable state according to the collected discharge voltage; and if so, starting the step of acquiring the voltage change rate of the battery in the standing mode based on the acquired discharge voltage.
According to one embodiment of the present disclosure, the determining of the depth of discharge includes: determining the current open-circuit discharge voltage of the battery according to the collected discharge current and the collected discharge current; inquiring a discharge curve of the battery based on the open-circuit discharge voltage, and determining the current state of charge of the battery; and determining the discharge depth of the battery corresponding to the current state of charge.
According to one embodiment of the disclosure, the determining the current open circuit discharge voltage of the battery according to the collected discharge current and the discharge current includes: acquiring an impedance value of an impedance sampling point on the battery corresponding to the discharge voltage at the current moment; acquiring average discharge current of the battery from entering the standing mode to the current moment according to the acquired discharge current; determining an estimated open circuit discharge voltage based on the average discharge current and the impedance value; acquiring average discharge voltage of the battery from entering the standing mode to the current moment according to the acquired discharge voltage; and compensating the estimated open-circuit discharge voltage based on the average discharge current to obtain the open-circuit discharge voltage.
According to one embodiment of the present disclosure, the obtaining the impedance value of the impedance sampling point on the battery corresponding to the current discharge voltage includes: acquiring an impedance sampling point on the battery corresponding to the discharge voltage at the current moment; and determining the impedance value of the impedance sampling point according to the environmental temperature of the environment where the battery is positioned.
According to one embodiment of the present disclosure, the determining that the battery of the terminal device enters the stationary mode includes: and collecting power consumption data after the terminal equipment is turned off, and judging whether a battery of the terminal equipment enters a standing mode or not according to the power consumption data.
According to one embodiment of the disclosure, the collecting the power consumption data after the terminal device is turned off, and determining whether the battery of the terminal device enters the standing mode according to the power consumption data includes: collecting the actual output voltage of the battery after the terminal equipment is turned off as the power consumption data; and determining that the battery enters the standing mode in response to the actual output voltage being less than or equal to a voltage threshold corresponding to the standing mode.
According to one embodiment of the disclosure, the determining that the battery enters the rest mode in response to the actual output voltage being less than or equal to a voltage threshold corresponding to the rest mode includes: acquiring the duration time that the actual output voltage is smaller than or equal to the voltage threshold value; and determining that the battery enters the standing mode in response to the duration reaching a preset duration.
To achieve the above object, a second aspect of the present disclosure provides a monitoring device for a battery status, including:
according to one embodiment of the present disclosure, the battery state monitoring device includes: the acquisition module is used for determining that a battery of the terminal equipment enters a standing mode, and acquiring discharge voltage and discharge current of the battery in the standing mode; a confirmation module for determining a maximum chemical capacity and depth of discharge of the battery based on the collected discharge voltage and discharge current; and an updating module for updating the remaining capacity and the usable full charge capacity of the battery based on the maximum chemical capacity and the depth of discharge.
To achieve the above object, an embodiment of a third aspect of the present disclosure provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to implement a method of monitoring a battery condition according to an embodiment of the first aspect of the present disclosure.
To achieve the above object, a fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium storing computer instructions for implementing a method for monitoring a battery status according to an embodiment of the first aspect of the present disclosure.
To achieve the above object, an embodiment of a fifth aspect of the present disclosure proposes a computer program product comprising a computer program for implementing a method of monitoring a battery status according to an embodiment of the first aspect of the present disclosure when being executed by a processor.
The terminal equipment in the present disclosure can determine whether the battery enters a standing mode or not in an uncharged state, so that a battery learning process can be performed, and based on the actual discharge voltage and discharge current collected in the standing mode, the RM and FCC are updated, so that the state of the battery can be reflected in real time, and accumulated errors are eliminated.
Drawings
FIG. 1 is a schematic diagram of a method of monitoring a battery condition according to one embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another method of monitoring battery status according to one embodiment of the present disclosure;
FIG. 3 is an OCV curve for one battery state in accordance with one embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method of monitoring battery status according to one embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method of monitoring battery status according to one embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a battery condition monitoring device according to one embodiment of the present disclosure;
fig. 7 is a schematic diagram of an electronic device according to one embodiment of the present disclosure.
Detailed Description
Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.
In the related art, after the battery is fully charged, the power consumption of the system is fully provided by the charger, and the battery enters a static state at the moment, and in the static state, the corresponding register can be updated through the fuel gauge, so that the effects of learning and updating the parameters of the battery are achieved. However, in implementation, due to the maturity of the rapid charging technology of the terminal device, the charging time is very short, and this leads to that the user can charge the terminal device in the daytime under most conditions, therefore, the terminal device is difficult to enter a static state during charging, and further can not learn and update the battery parameters, if the battery parameters can not be continuously learned and updated, the subsequent charging error of the battery can be increased.
Fig. 1 is a schematic diagram of an exemplary embodiment of a battery state monitoring method according to the present disclosure, as shown in fig. 1, the battery state monitoring method includes the following steps:
s101, determining that a battery of the terminal equipment enters a standing mode, and collecting discharge voltage and discharge current of the battery in the standing mode.
In the embodiment of the present disclosure, the terminal device may be a personal computer (Personal Computer, PC) tablet, a palm computer, a mobile phone, a wearable device, or the like, which is not limited herein.
The stationary mode is a mode in which the terminal device is in a low power state, in which the terminal device can be considered to be in a non-operating state. It will be appreciated that the power of the terminal device in this state is lower than that of a handset in normal use.
In the embodiment of the present disclosure, the standing mode of the terminal device may be a relay mode, and whether the battery enters the standing mode may be determined in a state where the terminal device is not charged. Alternatively, it may be determined whether the battery enters the stationary mode by measuring the discharge current of the battery in real time and comparing the discharge current with a current determination threshold. For example, the current determination threshold may be 10mA, and when the discharge current of the battery is measured in real time < 10mA, the mobile phone battery may be considered to enter the stationary mode.
Alternatively, it may also be determined whether the battery enters the stationary mode by measuring the operating power of the battery and comparing the operating power to a power determination threshold. For example, the power determination threshold may be 0.1W, and when the operating power of the battery is less than 0.1W, the mobile phone battery may be considered to enter the stationary mode.
The BATTERY of the terminal equipment comprises a BATTERY management system (Battery MANAGEMENT SYSTEM, BMS), and the BMS mainly has the functions of intelligently managing and maintaining each BATTERY unit, preventing the BATTERY from being overcharged and overdischarged, prolonging the service life of the BATTERY and monitoring the state of the BATTERY. The discharging voltage and the discharging current of the battery in the stationary mode can be collected through the BMS in the embodiment of the present disclosure.
S102, determining the maximum chemical capacity and the depth of discharge of the battery based on the collected discharge voltage and discharge current.
The maximum chemical capacity is the maximum amount of electricity that the battery can discharge in real time.
Depth of discharge (Depth of Discharge, DOD) refers to the percentage of the battery's discharged capacity to its rated capacity. The depth of discharge is a major factor affecting the life of the battery, and when the depth of discharge of the secondary battery is deeper, the shorter the charging life of the secondary battery is, which leads to a shorter service life of the battery, so that deep discharge should be avoided as much as possible when the secondary battery is used, and the secondary battery is prevented from being overdriven to an extremely low voltage.
After entering the standing mode, the current state of charge (SOC) of the battery can be determined through the collected discharge voltage and discharge current, a mapping relation exists between the SOC and the depth of discharge, and the depth of discharge of the battery can be determined based on the current SOC and the mapping relation.
In the embodiment of the disclosure, the maximum chemical capacity is the maximum electric quantity which can be discharged by the battery in real time, and the electric quantity discharged by the battery from entering the standing mode to the current moment can be determined based on the collected discharging current. After determining the discharge current, further, the maximum chemical capacity of the battery is determined by the depth of discharge, the amount of discharge, and the initial depth of discharge of the battery. The initial depth of discharge is the depth of discharge of the battery when the battery enters the stationary mode, and can be determined based on the SOC query mapping relationship when the battery enters the stationary mode.
And S103, updating the residual capacity and the usable full charge capacity of the battery based on the maximum chemical capacity and the depth of discharge.
In the disclosed embodiments, after the maximum chemical capacity and depth of discharge are obtained, the remaining capacity (RM) and the available Full charge capacity (Full ChargeCapacitive, FCC) may be updated based on the depth of discharge and the maximum chemical capacity to determine a target RM and a target FCC after battery update. The maximum chemical capacity and the discharge depth are determined based on the actual discharge condition of the battery, so that the actual state of the battery can be reflected, the RM and the FCC of the battery can be updated in real time, the battery can learn the actual RM and the FCC, the accumulation of errors is reduced, and the charge and discharge process of the battery can be corrected.
In the embodiment of the disclosure, firstly, determining that a battery of a terminal device enters a standing mode, collecting discharge voltage and discharge current of the battery in the standing mode, then determining maximum chemical capacity and discharge depth of the battery based on the collected discharge voltage and discharge current, and finally updating residual capacity RM and usable full charge capacity FCC of the battery based on the maximum chemical capacity and discharge depth. The terminal equipment in the present disclosure can determine whether the battery enters a standing mode or not in an uncharged state, so that a battery learning process can be performed, and based on the actual discharge voltage and discharge current collected in the standing mode, the RM and FCC can be updated, so that the state of the battery can be reflected in real time, and the user experience is prevented from being reduced due to error accumulation.
In the above embodiment, the remaining capacity RM of the battery and the usable full charge capacity FCC are updated based on the maximum chemical capacity and depth of discharge, and further explained by fig. 2, the method includes:
s201, acquiring the cut-off discharge depth, the discharge depth and the maximum chemical capacitance of the battery, and updating the residual capacity of the battery to determine the updated target residual capacity.
As shown in fig. 3, the open discharge voltage versus SOC may alternatively be determined by a discharge open voltage (OCV, open Circuit Voltage) curve. In the embodiment of the disclosure, the open-circuit discharge voltage is obtained through the collected discharge voltage and discharge current, the discharge open-circuit voltage OCV curve is inquired based on the open-circuit discharge voltage, the corresponding state of charge SOC can be inquired, and the discharge depth can be determined based on the SOC. Since the cell characteristics of the respective batteries are different, the corresponding OCV curves may be different, and it is specifically necessary to set the OCV curves according to the actual situation.
The initial depth of discharge is the depth of discharge of the battery when it enters the stationary mode, and can be determined based on the SOC query map when the battery enters the stationary mode. The cut-off depth of discharge of the battery is the maximum depth of discharge possible when the battery is discharged, and can be determined based on the chemical characteristics of the cells in the battery.
In the embodiment of the disclosure, the discharging depth can be determined based on the collected discharging current and discharging voltage, and the current discharging depth of the battery is obtained according to the current SOC.
The maximum chemical capacitance can be calculated from the collected discharge current and discharge voltage. In the embodiment of the disclosure, coulomb integration can be performed on the collected discharge current to obtain the discharge electric quantity of the battery, and the maximum chemical capacity is further determined based on the discharge electric quantity, the initial discharge depth and the discharge depth of the battery. Optionally, the real-time determined depth of discharge is different from the initial depth of discharge of the battery, and the maximum chemical capacity of the battery is obtained by comparing the electric quantity of discharge with the difference.
In embodiments of the present disclosure, the maximum chemical capacity of the battery may be determined using the following formula:
wherein Q is max DOD, the maximum chemical capacity of the battery t DOD for real-time depth of discharge of battery 1 For the initial depth of discharge of the battery upon entering the rest mode,
coulomb integration is performed on the discharge current from the time when the battery enters the stationary mode to the present time.
After the cut-off discharge depth, the discharge depth and the maximum chemical capacitance of the battery are obtained, a target RM can be obtained through calculation, and battery data are updated through the target RM.
In the disclosed embodiment, the target RM may be calculated by the following formula:
RM＝(DOD t -DOD end )*Q max
wherein DOD t DOD for real-time depth of discharge of battery end To cut-off depth of discharge after completion of discharge of battery, Q max Is the maximum chemical capacity.
S202, obtaining the discharge electric quantity of the battery, and updating the usable full charge capacity of the battery according to the target residual capacity, the discharge electric quantity and the discharge depth to determine the updated target usable full charge capacity.
In the embodiment of the present disclosure, after the target RM and the depth of discharge are obtained, the FCC of the battery may be updated to obtain the updated target FCC of the battery, and in the embodiment of the present disclosure, the following formula is adopted to determine the target FCC:
FCC＝DOD t *Q max +Q 1 +RM
wherein Q is 1 For indicating that the battery has been coulombically integrated with the sampled discharge current upon entering the rest mode.
In an embodiment of the present disclosure, the RM and FCC of the battery are updated based on the cutoff depth of discharge, and maximum chemical capacitance of the battery to determine updated target RM and target FCC. In the method, the maximum chemical capacity and the discharge depth are determined based on the actual discharge condition of the battery, so that the actual state of the battery can be reflected, the RM and the FCC of the battery can be updated in real time, the battery can learn the actual RM and the FCC, the accumulation of errors is reduced, and the charge and discharge process of the battery can be corrected. Further, after the battery enters the stationary mode, it can be judged whether the battery is in a voltage stable state by detecting the discharge voltage of the terminal device measured at intervals. In the embodiment of the disclosure, the battery in a stable state can update the maximum chemical capacity, so that the updated maximum chemical capacity can be ensured to be more accurate, and the problem that the maximum chemical capacity has errors due to unstable voltage is avoided.
Alternatively, after the voltages detected n consecutive times are smaller than the previous voltage detection value, the battery voltage may be considered to be in a regulated state, i.e., the battery enters the stationary mode. The number of times of detection is larger than 1, and the specific number of times may be set according to the actual situation, and further, the value of the voltage determination threshold is not unique, and need to be set according to the actual need, which is not limited in any way. For example, the number of consecutive detections n is set to 5, and when Vn is 5 times continuously less than or equal to Vn-5, the battery voltage is at steady state.
Alternatively, the battery may be considered to be in a voltage stable state when the voltage is in a continuously decreasing state by determining the trend of the voltage.
Based on the above embodiments, it is necessary to obtain the maximum chemical power of the voltage steady state, for example, 4 is a possible implementation manner of determining the voltage steady state, and the method includes:
s401, based on the collected discharging voltage, the voltage change rate of the battery in the standing mode is obtained.
In the embodiment of the disclosure, when the battery is in a voltage stable state, the voltage change rate can be determined by collecting the voltage data of the battery in the standing mode and the corresponding time of the voltage data. The calculation can be performed by the following formula:
dv＝(V 1 -V n )/t。
wherein, V1 enters the voltage value under the standing mode, t is the time interval, V n For voltages measured at time intervals t. The rate of change of the voltage can reflect the rate of change of the voltage from the rest mode.
S402, comparing the voltage change rate with a set change rate threshold value, and determining whether the voltage change rate is smaller than the set change rate threshold value.
And S403, if so, starting a step of carrying out coulomb integration on the collected discharge current to obtain the discharge electric quantity of the battery.
In the embodiment of the present disclosure, after the voltage change rate is obtained, the voltage change rate may be compared with the set change rate threshold, and when the voltage change rate is smaller than the set change rate threshold, it may be considered that the condition for updating the maximum chemical capacity of the battery is provided at this time. The set change rate threshold value may be set according to actual conditions, and is not limited in any way. For example, the set rate of change threshold may be m, and when the rate of change of voltage is less than m, the maximum chemical capacity of the battery may be updated by the above steps.
It is understood that the maximum chemical capacity of the battery is reduced along with the loss of the battery during the use process, so that it is required to monitor the maximum chemical capacity of the battery in real time according to the discharge voltage and the discharge current of the battery to prevent the maximum chemical capacity from being reduced, thereby affecting the use of the battery. For example, the maximum chemical power of the new battery is 3000mAh, after a period of use, the mobile phone still displays 20% of the power when the power of the battery is 2400mAh if the power of the battery is not monitored due to the maximum chemical power loss of 2500mAh, and the actual power is only 100mA, which may cause misguidance to the user.
In the above embodiment, the determination of the depth of discharge may be further explained by fig. 5, which includes:
s501, determining the current open-circuit discharge voltage of the battery according to the collected discharge current and discharge voltage.
Since the impedance exists in the battery itself, a part of the voltage can be shared, therefore, the voltage of the part of the impedance needs to be calculated to compensate the collected discharge voltage, so that the open-circuit discharge voltage is calculated, and a basis is provided for obtaining accurate maximum chemical capacity and target FCC later.
In the embodiment of the disclosure, an impedance value of an impedance sampling point on a battery corresponding to a discharge voltage at a current time is obtained. It should be noted that, the battery may include a plurality of impedance sampling points, and different impedance sampling points often correspond to a voltage range, so when we obtain the discharge voltage, we can determine the sampling point according to the discharge voltage, thereby determining the accurate impedance value corresponding to the discharge voltage.
As one possible implementation, the impedance values of different batteries may be different, and the impedance values of the same battery may also be different at different ambient temperatures. In the embodiment of the disclosure, the impedance value of the impedance sampling point can be determined by firstly obtaining the impedance sampling point on the battery corresponding to the discharge voltage at the current moment and then according to the environmental temperature of the environment where the battery is located. Alternatively, the impedance value of the battery under the current conditions can also be determined by an impedance measurement plug-in, which can be stored in the memory space of the handset for retrieval for use when required. For example, the plug-in may be a quick Current.
For example, as shown in the following table, the table is an impedance lookup table. Each impedance sampling point corresponds to a voltage range, is determined to be that impedance sampling point based on the range in which the discharge voltage at the current time is located, and then determines the impedance value of the battery based on the current temperature. Therefore, the accurate impedance value of the battery is determined according to different environments, so that the accuracy of the open-circuit discharge voltage calculated later is ensured. It should be noted that the data in this table is not unique and can be obtained from actual battery measurements.
| Polarization of | I 1 | I 2 | I 3 | …… | I m |
| R 1 | R 11 | R 12 | R 13 | …… | I 1m |
| R 2 | R 12 | R 22 | R 23 | …… | I 2m |
| R 3 | R 13 | R 32 | R 33 | …… | I 3m |
| R 4 | R 14 | R 42 | R 43 | …… | I 4m |
| R 5 | R 15 | R 52 | R 53 | …… | I 5m |
| R 6 | R 16 | R 62 | R 63 | …… | I 6m |
| R 7 | R 17 | R 72 | R 73 | …… | I 7m |
| R 8 | R 18 | R 82 | R 83 | …… | I 8m |
| R 9 | R 19 | R 92 | R 93 | …… | I 9m |
According to the collected discharging current, obtaining the average discharging current from the battery entering the standing mode to the current moment, determining and estimating the open-circuit discharging voltage according to the average discharging current and the impedance value, then according to the collected discharging voltage, obtaining the average discharging voltage from the battery entering the standing mode to the current moment, and finally compensating the estimated open-circuit discharging voltage based on the average discharging current to obtain the open-circuit discharging voltage. Therefore, by removing the generated part of the battery impedance in the discharge voltage, the accurate open-circuit discharge voltage can be obtained, and a basis is provided for the subsequent updating of the battery data.
According to the collected discharging current, obtaining the average discharging current from the battery entering the standing mode to the current moment, determining and estimating the open-circuit discharging voltage according to the average discharging current and the impedance value, then according to the collected discharging voltage, obtaining the average discharging voltage from the battery entering the standing mode to the current moment, and finally compensating the estimated open-circuit discharging voltage based on the average discharging current to obtain the open-circuit discharging voltage. Therefore, by removing the generated part of the battery impedance in the discharge voltage, the accurate open-circuit discharge voltage can be obtained, and a basis is provided for the subsequent updating of the battery data.
The current open circuit discharge voltage of the battery can be calculated by the following formula:
OCV＝V 3 +I 3 R n
wherein V is 3 For average discharge voltage, I 3 R is the average discharge current n Is the impedance value. In the embodiment of the present disclosure, the average discharge voltage may be calculated by summing all the sampled discharge voltages and dividing by the number of samples, and likewise, the average discharge current may be calculated by summing all the sampled discharge currents and dividing by the number of samples.
S502, inquiring a discharge curve of the battery based on the open circuit discharge voltage, and determining the current charge state of the battery.
S503, determining the depth of discharge of the battery corresponding to the current charge state.
In the embodiment of the present disclosure, the sum of the State of Charge (SOC) and the depth of discharge is 1, and thus, the corresponding depth of discharge can be determined by the current SOC. The depth of discharge can be obtained by the following formula:
DOD＝1-SOC
in the embodiment of the disclosure, firstly, the current open-circuit discharge voltage of the battery is determined according to the collected discharge current and discharge voltage, then, the discharge OCV curve of the battery is inquired based on the open-circuit discharge voltage, the current SOC of the battery is determined, and finally, the discharge depth of the battery corresponding to the current SOC is determined. Thus, the depth of discharge at each instant can be accurately determined by the OCV discharge curve, whereby the battery condition can be monitored.
Corresponding to the battery state monitoring methods provided in the foregoing several embodiments, an embodiment of the present disclosure further provides a battery state monitoring device, and since the battery state monitoring device provided in the embodiment of the present disclosure corresponds to the battery state monitoring method provided in the foregoing several embodiments, implementation of the battery state monitoring method described above is also applicable to the battery state monitoring device provided in the embodiment of the present disclosure, and will not be described in detail in the following embodiments.
Fig. 6 is a schematic diagram of a battery state monitoring device according to the present disclosure, as shown in fig. 6, the battery state monitoring device 600 includes: an acquisition module 610, a validation module 620, and an update module 630.
The collecting module 610 is configured to determine that the battery of the terminal device enters the standing mode, and collect a discharge voltage and a discharge current of the battery in the standing mode.
A validation module 620 for determining a maximum chemical capacity and depth of discharge of the battery based on the collected discharge voltage and discharge current.
The updating module 630 is configured to update the remaining capacity RM and the usable full charge capacity FCC of the battery based on the maximum chemical capacity and the depth of discharge.
In one embodiment of the present disclosure, the update module 630 is further configured to: acquiring the cut-off discharge depth, the discharge depth and the maximum chemical capacitance of the battery, and updating the RM of the battery to determine an updated target RM; the FCC of the battery is updated based on the target RM and the depth of discharge to determine an updated target FCC.
In one embodiment of the present disclosure, the confirmation module 620 is further configured to: coulomb integration is carried out on the collected discharge current to obtain the discharge electric quantity of the battery; the maximum chemical capacity is determined based on the amount of discharge, the initial depth of discharge of the battery, and the depth of discharge.
In one embodiment of the present disclosure, the confirmation module 620 is further configured to: acquiring the voltage change rate of the battery in a standing mode based on the acquired discharge voltage; comparing the voltage change rate with a set change rate threshold value, and determining that the voltage change rate is smaller than the set change rate threshold value.
In one embodiment of the present disclosure, the confirmation module 620 is further configured to: and determining that the battery is in a voltage stable state according to the collected discharge voltage.
In one embodiment of the present disclosure, the confirmation module 620 is further configured to: determining the current open-circuit discharge voltage of the battery according to the collected discharge current and the discharge current; inquiring a discharging OCV curve of the battery based on the open-circuit discharging voltage, and determining the current SOC of the battery; and determining the discharge depth of the battery corresponding to the current SOC.
In one embodiment of the present disclosure, the confirmation module 620 is further configured to: the confirmation module 620 is further configured to: acquiring an impedance value of an impedance sampling point on the battery corresponding to the discharge voltage at the current moment; according to the collected discharge current, obtaining the average discharge current of the battery from entering a standing mode to the current moment; determining an estimated open circuit discharge voltage according to the average discharge current and the impedance value; acquiring average discharge voltage of the battery from entering a standing mode to the current moment according to the acquired discharge voltage; and compensating the estimated open circuit discharge voltage based on the average discharge current to obtain the open circuit discharge voltage.
In one embodiment of the present disclosure, the confirmation module 620 is further configured to: acquiring an impedance sampling point on a battery corresponding to the discharge voltage at the current moment; and determining the impedance value of the impedance sampling point according to the environmental temperature of the environment where the battery is positioned.
In one embodiment of the present disclosure, the acquisition module 610 is further configured to: and collecting power consumption data of the terminal equipment after screen-off, and judging whether a battery of the terminal equipment enters a standing mode according to the power consumption data.
In one embodiment of the present disclosure, the acquisition module 610 is further configured to: acquiring the actual output voltage of a battery after the terminal equipment is turned off as power consumption data; and determining that the battery enters the standing mode in response to the actual output voltage being less than or equal to a voltage threshold corresponding to the standing mode.
In one embodiment of the present disclosure, the acquisition module 610 is further configured to: acquiring the duration time that the actual output voltage is smaller than or equal to a voltage threshold value; and determining that the battery enters the standing mode in response to the duration reaching a preset duration.
In order to implement the above embodiments, the embodiments of the present disclosure further provide an electronic device 700, as shown in fig. 7, where the electronic device 700 includes: the processor 701 is communicatively connected to a memory 702, and the memory 702 stores instructions executable by the at least one processor, the instructions being executable by the at least one processor 701 to implement a method of monitoring a battery condition as an embodiment of the first aspect of the present disclosure.
To achieve the above-described embodiments, the embodiments of the present disclosure also propose a non-transitory computer-readable storage medium storing computer instructions for causing a computer to implement a method of monitoring a battery status as the embodiments of the first aspect of the present disclosure.
In order to implement the above-described embodiments, the embodiments of the present disclosure also propose a computer program product comprising a computer program which, when executed by a processor, implements a method of monitoring a battery status as in the embodiments of the first aspect of the present disclosure.
In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.
Claims (15)
1. A method for monitoring a battery condition, comprising:
determining that a battery of a terminal device enters a standing mode, and collecting discharge voltage and discharge current of the battery in the standing mode;
determining a maximum chemical capacity and depth of discharge of the battery based on the collected discharge voltage and discharge current;
the remaining capacity and usable full charge capacity of the battery are updated based on the maximum chemical capacity and the depth of discharge.
2. The method of claim 1, wherein the determining of the maximum chemical capacity comprises:
coulomb integration is carried out on the collected discharge current to obtain the discharge electric quantity of the battery;
the maximum chemical capacity is determined based on the amount of discharge, an initial depth of discharge of the battery, and the depth of discharge.
3. The method of claim 1, wherein updating the remaining capacity and usable full charge capacity of the battery based on the maximum chemical capacity and depth of discharge comprises:
acquiring the cut-off discharge depth, the discharge depth and the maximum chemical capacitance of the battery, and updating the battery to determine an updated target;
and acquiring the discharge electric quantity of the battery, and updating the usable full charge capacity of the battery according to the target residual capacity, the discharge electric quantity and the discharge depth so as to determine the updated target usable full charge capacity.
4. The method of claim 2, wherein said coulombically integrating said collected discharge current to obtain a discharge level of said battery comprises:
acquiring a voltage change rate of the battery in the standing mode based on the acquired discharge voltage;
comparing the voltage change rate with a set change rate threshold value, and determining whether the voltage change rate is smaller than the set change rate threshold value;
and if so, starting the step of carrying out coulomb integration on the collected discharge current to obtain the discharge electric quantity of the battery.
5. The method of claim 4, wherein the acquiring a rate of change of voltage of the battery in the stationary mode based on the acquired discharge voltage comprises:
determining whether the battery is in a voltage stable state according to the collected discharge voltage;
and if so, starting the step of acquiring the voltage change rate of the battery in the standing mode based on the acquired discharge voltage.
6. The method of claim 1, wherein the depth of discharge determination comprises:
determining the current open-circuit discharge voltage of the battery according to the collected discharge voltage and the collected discharge current;
inquiring a discharge curve of the battery based on the open-circuit discharge voltage, and determining the current state of charge of the battery;
and determining the discharge depth of the battery corresponding to the current state of charge.
7. The method of claim 6, wherein said determining the present open circuit discharge voltage of the battery based on the collected discharge voltage and the discharge current comprises:
acquiring an impedance value of an impedance sampling point on the battery corresponding to the discharge voltage at the current moment;
acquiring average discharge current of the battery from entering the standing mode to the current moment according to the acquired discharge current;
determining an estimated open circuit discharge voltage based on the average discharge current and the impedance value;
acquiring average discharge voltage of the battery from entering the standing mode to the current moment according to the acquired discharge voltage;
and compensating the estimated open-circuit discharge voltage based on the average discharge current to obtain the open-circuit discharge voltage.
8. The method of claim 7, wherein the obtaining the impedance value of the impedance sampling point on the battery corresponding to the current discharge voltage comprises:
acquiring an impedance sampling point on the battery corresponding to the discharge voltage at the current moment;
and determining the impedance value of the impedance sampling point according to the environmental temperature of the environment where the battery is positioned.
9. The method according to any of claims 1-8, wherein said determining that the battery of the terminal device is in a stationary mode comprises:
and collecting power consumption data after the terminal equipment is turned off, and judging whether a battery of the terminal equipment enters a standing mode or not according to the power consumption data.
10. The method according to claim 9, wherein the collecting the power consumption data after the terminal device is turned off, and determining whether the battery of the terminal device enters the stand still mode according to the power consumption data, includes:
collecting the actual output voltage of the battery after the terminal equipment is turned off as the power consumption data;
and determining that the battery enters the standing mode in response to the actual output voltage being less than or equal to a voltage threshold corresponding to the standing mode.
11. The method of claim 10, wherein the determining that the battery enters the stationary mode in response to the actual output voltage being less than or equal to a voltage threshold corresponding to the stationary mode comprises:
acquiring the duration time that the actual output voltage is smaller than or equal to the voltage threshold value;
and determining that the battery enters the standing mode in response to the duration reaching a preset duration.
12. A monitoring device for a battery state, comprising:
the acquisition module is used for determining that a battery of the terminal equipment enters a standing mode, and acquiring discharge voltage and discharge current of the battery in the standing mode;
a confirmation module for determining a maximum chemical capacity and depth of discharge of the battery based on the collected discharge voltage and discharge current;
and an updating module for updating the remaining capacity and the usable full charge capacity of the battery based on the maximum chemical capacity and the depth of discharge.
13. An electronic device, comprising a memory and a processor;
wherein the processor runs a program corresponding to executable program code stored in the memory by reading the executable program code for implementing the method according to any one of claims 1-11.
14. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1-11.
15. A computer program product comprising a computer program which, when executed by a processor, implements the method according to any of claims 1-11.
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| CN202111629198.6A CN116359754A (en) | 2021-12-28 | 2021-12-28 | Method and device for monitoring battery state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117420463A (en) * | 2023-12-19 | 2024-01-19 | 浙江地芯引力科技有限公司 | Method and device for updating chemical capacity of battery, electronic equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117420463A (en) * | 2023-12-19 | 2024-01-19 | 浙江地芯引力科技有限公司 | Method and device for updating chemical capacity of battery, electronic equipment and storage medium |
| CN117420463B (en) * | 2023-12-19 | 2024-03-26 | 浙江地芯引力科技有限公司 | Method and device for updating chemical capacity of battery, electronic equipment and storage medium |
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