CN113608124A - Battery capacity estimation method and device, calibration module and storage medium - Google Patents
Battery capacity estimation method and device, calibration module and storage medium Download PDFInfo
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- G—PHYSICS
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- 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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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Abstract
The embodiment of the invention relates to the technical field of batteries, and discloses a battery capacity estimation method and device, a calibration module and a storage medium. The method comprises the following steps: acquiring corresponding calibration voltage of the battery when the battery is in calibration capacity, wherein each calibration capacity is distributed in a calibration range, and the calibration range is less than or equal to the total capacity of the battery; detecting whether the current voltage of the battery reaches a calibration voltage; when the current voltage reaches the calibration voltage, the current capacity of the battery is calibrated to the calibration capacity. Compared with the related art, the estimation result of the battery capacity generates errors continuously along with the change of time, the change of the charge and discharge state and the like, the embodiment of the invention can acquire the corresponding calibration voltage when the battery is in the calibration capacity, and calibrate the current capacity of the battery when the current voltage of the battery reaches the calibration voltage, thereby effectively improving the accuracy of the estimation of the battery capacity.
Description
Technical Field
The embodiment of the invention relates to the technical field of batteries, in particular to a battery capacity estimation method and device, a calibration module and a storage medium.
Background
The remaining Battery capacity, also called Battery State Of Charge (SOC), is specifically equal to the percentage Of the remaining Battery capacity to the rated Battery capacity, and is one Of the parameters representing the amount Of electricity currently available to the Battery for the electric equipment, and accurate estimation Of the Battery SOC is very important for the operation Of systems such as Battery Management Systems (BMS), because many functions in the System depend on the estimation result Of the Battery SOC.
However, the accuracy of the battery SOC estimated by the current technology is often low, which not only affects the normal operation of the system, but also causes the battery to be in an abnormal working state for a long time, and has short battery life and high maintenance cost.
Disclosure of Invention
The embodiment of the invention aims to provide a battery capacity estimation method and device, a calibration module and a storage medium, which can calibrate the current capacity of a battery so as to improve the estimation accuracy of the battery capacity, further prolong the service life of the battery and effectively reduce the maintenance cost.
In order to solve the above technical problem, an embodiment of the present invention provides a battery capacity estimation method, including the following steps: acquiring a corresponding calibration voltage when the battery is in a calibration capacity; wherein each calibration capacity is distributed within a calibration range, the calibration range being less than or equal to the total capacity of the battery; detecting whether the current voltage of the battery reaches a calibration voltage; when the current voltage reaches the calibration voltage, the current capacity of the battery is calibrated to the calibration capacity.
An embodiment of the present invention also provides a battery capacity estimation apparatus, including: the device comprises an acquisition module, a detection module and a calibration module; the acquisition module is connected with the detection module, and the detection module is connected with the calibration module; the acquisition module is used for acquiring corresponding calibration voltage of the battery when the battery is in calibration capacity, wherein each calibration capacity is distributed in a calibration range, and the calibration range is less than or equal to the total capacity of the battery; the detection module is used for detecting whether the current voltage of the battery reaches the calibration voltage or not; the calibration module is used for calibrating the current capacity of the battery to be the calibration capacity when the current voltage reaches the calibration voltage.
An embodiment of the present invention further provides a calibrator, including: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the battery capacity estimation method.
An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the above-mentioned battery capacity estimation method.
Compared with the related art, the estimation result of the battery capacity always generates errors along with the change of time, the change of the charge and discharge state and the like, the embodiment of the invention can acquire the corresponding calibration voltage when the battery is in the calibration capacity, and calibrate the current capacity of the battery when the current voltage of the battery reaches the calibration voltage, thereby effectively improving the accuracy of the estimation of the battery capacity. And the higher the accuracy of battery capacity estimation is, the higher the endurance mileage can be for the battery of the same capacity, and then the battery cost that can effectively reduce needs can also prolong battery life to a certain extent.
In addition, the calibration capacities are uniformly distributed in the calibration range, the interval of the calibration capacities is larger than a preset value, and the calibration range is smaller than the total capacity of the battery. In this embodiment, each calibration capacity is uniformly distributed in the calibration range to stably calibrate the current capacity of the battery, and the interval of each calibration capacity in the correspondence relationship is increased, so that the calibration interval can be reduced to reduce the data amount to be processed by the system, thereby effectively improving the stability of the whole system. In addition, the calibration range is smaller than the total capacity of the battery, and compared with the capacity calibration in real time in the whole process, the data volume needing to be processed by the system can be further reduced, and the stability of the whole system is effectively improved.
In addition, when the battery is in a charging state, the calibration range is 90% -100% of the total capacity; the calibration range is 0-10% of the total capacity when the battery is in a discharged state. In this embodiment, the current capacity of the battery is calibrated in real time when the battery is not fully charged (from 90% of the total capacity) or fully discharged (from 10% of the total capacity), so as to effectively avoid that some batteries cannot be fully charged or fully discharged, but calibration is performed by using calibration data when the battery is fully charged or fully discharged, thereby effectively improving the accuracy of battery capacity estimation.
In addition, the battery comprises at least two battery cell units; before detecting whether the current voltage of the battery reaches the calibration voltage, the method further comprises the following steps: detecting the voltage of each battery cell monomer; when the battery is in a charging state, taking the highest voltage in the voltages of all the single battery cells as the current voltage; and when the battery is in a discharging state, taking the lowest voltage in the voltages of the single battery cells as the current voltage. In this embodiment, the battery is specifically composed of at least two battery cell monomers, when the battery is in a charging state, the highest voltage of the voltages of the battery cell monomers is obtained as the current voltage for comparison, and when the battery is in a discharging state, the lowest voltage is obtained as the current voltage for comparison, so that a situation that when the voltages of most battery cells of the battery are greater than or less than a certain calibration voltage, the current capacity of the battery starts to be calibrated to the calibration capacity corresponding to the calibration voltage is avoided, and the accuracy of battery capacity estimation is further improved.
In addition, before obtaining a calibration voltage corresponding to the battery at the calibration capacity, the method further includes: acquiring an available capacity ratio according to a preset corresponding relation between the current and the current temperature of the battery and the available capacity ratio of the battery; acquiring the total capacity according to the available capacity ratio and the nominal capacity of the battery; the available capacity ratio is a ratio of the total capacity to the nominal capacity. In this embodiment, since the total capacity of the battery is not constant and changes with the change of the current and the temperature of the battery, if only a fixed value is used as the total capacity of the battery, for example, the nominal capacity of the battery is always used as the total capacity of the battery, the accuracy of estimating the capacity of the battery is seriously affected.
In addition, acquiring a calibration voltage corresponding to the battery when the battery is at the calibration capacity includes: and acquiring calibration voltage according to the preset corresponding relation among the current, the current temperature, the calibration capacity and the calibration voltage of the battery. In this embodiment, the calibration voltage of the battery is specifically obtained according to the information of the current, the current temperature, and the calibration capacity of the battery, and the calibration voltage obtained from multiple dimensions is more accurate, which is beneficial to more accurately estimating the current capacity of the battery.
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One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a first flow chart of a battery capacity estimation method according to one embodiment of the present application;
FIG. 2 is a flow chart diagram two of a battery capacity estimation method according to one embodiment of the present application;
FIG. 3 is a flow chart diagram three of a battery capacity estimation method according to one embodiment of the present application;
FIG. 4 is a fourth flowchart of a battery capacity estimation method according to one embodiment of the present application;
FIG. 5 is a flow chart diagram of a battery capacity estimation method according to one embodiment of the present application;
FIG. 6 is a block schematic diagram of a battery capacity estimation apparatus according to one embodiment of the present application;
FIG. 7 is a block schematic diagram of a calibrator in accordance with one embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
The battery pack is required to be placed on the sea bottom for supply in ocean energy storage supply, the battery pack cannot be frequently fished, and the maintenance cost is high, so that the battery pack with large capacity is required to be stored usually, and the requirements on the reliability and the service life of the battery pack are high. The BMS system for managing the operation of the battery pack generally needs to estimate the capacity of the battery in the battery pack to control the normal operation of the battery pack and the BMS system according to the current capacity of the battery, and if the estimation result is not accurate enough, the BMS system cannot operate normally even if more protection functions are added, the service life of the battery is shortened, and the maintenance cost of the battery is high.
One embodiment of the present invention relates to a battery capacity estimation method. The method is applied to a system such as a BMS and the like, and is used for estimating the current capacity of the battery more accurately by calibrating the battery capacity estimated by using ampere-hour integration. The following describes the implementation details of the battery capacity estimation method of the present embodiment in detail, and the following is only provided for the convenience of understanding and is not necessary for implementing the present embodiment.
The specific flow of the battery capacity estimation method of the present embodiment is shown in fig. 1.
Compared with the related art, the estimation result of the battery capacity often generates errors along with the change of time, the change of the charging and discharging state and the like, the calibration voltage corresponding to the battery in the calibration capacity is obtained, the current capacity of the battery is calibrated when the current voltage of the battery reaches the calibration voltage, and the accuracy of battery capacity estimation is effectively improved. And the higher the accuracy of battery capacity estimation is, the higher the endurance mileage can be for the battery of the same capacity, and then the battery cost that can effectively reduce needs can also prolong battery life to a certain extent.
In particular, there is at least one calibration capacity for calibrating the current capacity of the battery, each calibration capacity being distributed within a calibration range when there are a plurality of calibration capacities, the calibration range being less than or equal to the total capacity of the battery.
In one embodiment, the calibration capacities are evenly distributed within a calibration range, and the intervals of the calibration capacities are larger than a preset value, and the calibration range is smaller than the total capacity of the battery.
In this embodiment, each calibration capacity is uniformly distributed in the calibration range to stably calibrate the current capacity of the battery, and the interval of each calibration capacity in the correspondence relationship is increased, so that the calibration interval can be reduced to reduce the data amount to be processed by the system, thereby effectively improving the stability of the whole system. In addition, the calibration range is smaller than the total capacity of the battery, and compared with the capacity calibration in real time in the whole process, the data volume needing to be processed by the system can be further reduced, and the stability of the whole system is effectively improved.
In one embodiment, the calibration range is 90% -100% of the total capacity when the battery is in a charged state; the calibration range is 0-10% of the total capacity when the battery is in a discharged state.
Specifically, the calibrator determines whether the battery is in a charging state or a discharging state, when the battery is in the charging state, the ampere-hour integration method can be used for estimating the current capacity of the battery when the total capacity of the battery is 0-90%, the real-time voltage calibration can be performed only when the total capacity of the battery is 90-100%, when the battery is in the discharging state, the ampere-hour integration method can be used for estimating the current capacity of the battery when the total capacity of the battery is 10-100%, and the real-time voltage calibration can be performed only when the total capacity of the battery is 0-10%.
The battery capacity is estimated by an ampere-hour integration method as follows:
and (2) adopting a 1s period timer, combining the current charging/discharging current of the battery, accumulating or subtracting the obtained result, specifically, when the battery is in a charging state, taking 1s as a period, calculating a time integral of the charging current of the battery, adding the current capacity of the battery and the obtained result to obtain an updated current capacity, and similarly, when the battery is in a discharging state, calculating the time integral of the discharging current of the battery, and subtracting the obtained result from the current capacity of the battery to obtain the updated current capacity. However, the integration itself will also accumulate the errors continuously, and further will reduce the accuracy of the battery capacity estimation, so this embodiment will calibrate the capacity of the battery in real time when the battery charge/discharge is about to end, so as to improve the accuracy of the battery capacity estimation.
It should be noted that, a technician may also adjust the calibration range to perform voltage calibration on the current capacity of the battery around the capacity that needs to be acquired for subsequent calculation, so as to acquire the current capacity of the battery more accurately.
In this embodiment, when the battery is not fully charged (from 90% of the total capacity) or fully discharged (from 10% of the total capacity), the current capacity of the battery is calibrated in real time, so as to effectively avoid that some batteries cannot be fully charged or fully discharged, but calibration data of the batteries in the fully charged or fully discharged state is used for calibration, so that accuracy of battery capacity estimation is effectively improved, and generally, the batteries can be charged to 90% of the total capacity of the batteries, so that real-time calibration is performed from 90% of the total capacity of the batteries in the charging process, and accuracy of battery capacity estimation can be effectively ensured. Similarly, the battery can be discharged to 10% of the total capacity of the battery, so that the real-time calibration is performed from 10% of the total capacity of the battery in the discharging process, and the accuracy of battery capacity estimation can be effectively ensured.
In one embodiment, a method for obtaining a present voltage of a battery is provided.
The specific flow of the battery capacity estimation method of the present embodiment is shown in fig. 2, wherein step 201 and step 206 are substantially the same as step 101 and step 102, except that step 202 to step 205 are further included.
Specifically, the battery includes at least two battery cell units, and the voltages of the battery cell units are respectively detected.
And 204, taking the highest voltage of the voltages of the battery cell monomers as the current voltage.
Specifically, whether the battery is in a charging state is judged, if so, the highest voltage of each single battery cell is taken as the current voltage, and if not, the battery is considered to be in a discharging state at the moment, and the lowest voltage of each single battery cell is taken as the current voltage.
In an embodiment, referring to fig. 3, step 301, step 302, step 303, step 304, and step 308 are substantially the same as step 201, step 202, step 203, step 204, and step 206, and are not repeated herein.
Specifically, in this embodiment, when it is determined that the battery is not in the charging state, it is further determined whether the battery is in the discharging state at this time, if the battery is in the discharging state, the lowest voltage among the voltages of the individual battery cells is taken as the current voltage, and if the battery is not in the discharging state, the battery is considered to be in the resting state at this time, or it may be specifically determined whether the battery is in the resting state at this time, for example, it is detected whether the voltage/current at the input/output end of the battery is 0, and if it is determined that the battery is in the resting state at this time, the current capacity of the battery is not changed.
In this embodiment, the battery is specifically composed of at least two battery cell monomers, when the battery is in a charging state, the highest voltage of the voltages of the battery cell monomers is obtained as the current voltage for comparison, and when the battery is in a discharging state, the lowest voltage is obtained as the current voltage for comparison, so that a situation that when the voltages of most battery cells of the battery are greater than or less than a certain calibration voltage, the current capacity of the battery starts to be calibrated to the calibration capacity corresponding to the calibration voltage is avoided, and the accuracy of battery capacity estimation is further improved.
In one embodiment, a specific implementation form for obtaining the total capacity of the battery is provided.
The specific flow of the battery capacity estimation method of the present embodiment is shown in fig. 4, and steps 402 to 409 are substantially the same as steps 301 to 308, and are not described herein again, except that step 401 is further included.
Specifically, the present application may first obtain the available capacity ratio of the battery according to a preset corresponding relationship between the current of the battery, the current temperature, and the available capacity ratio, where the available capacity ratio is specifically a ratio of the total capacity of the battery to the nominal capacity of the battery, and the corresponding relationship between the current of the battery, the current temperature, and the available capacity ratio is, for example, table 1 below, where 0.3C, 0.6C, and the like, correspond to the current of the battery, and if the nominal input/output current of the battery is equal to 5A, the current of the battery corresponding to 0.3C is 5A × 0.3 — 1.5A, the current of the battery corresponding to 0.6C is 5A × 0.6 — 3A, the current of the battery corresponding to 1C is 5A × 1 — 5A, and the current of the battery corresponding to 2C is 5A × 2 — 10A. For example, if the current of the battery is equal to 3A (corresponding to 0.6C) and the current temperature is 10℃, the available capacity ratio of the battery is 89.94% as shown in table 1.
TABLE 1 corresponding relationship table of present current, present temperature and available capacity ratio of battery
| 0.3C | 0.6C | 1C | 2C | |
| 0℃ | 85.92％ | 86.18％ | 85.51％ | 84.87％ |
| 10℃ | 92.30％ | 89.94％ | 88.73％ | 88.42％ |
| 25℃ | 97.11％ | 95.47％ | 94.53％ | 93.63％ |
| 35℃ | 98.94％ | 98.07％ | 96.94％ | 96.83％ |
| 45℃ | 98.85％ | 99.37％ | 96.94％ | 98.13％ |
After the available capacity ratio is obtained, the total capacity of the battery is obtained according to the available capacity ratio and the nominal capacity, for example, the available capacity ratio is 89.94%, the nominal capacity of the battery is 5Ah, and the total capacity of the battery in the current state is equal to the nominal capacity of the battery multiplied by the available capacity ratio, that is, the total capacity of the battery is 5Ah 89.94% ═ 4.497 Ah.
In this embodiment, since the total capacity of the battery is not constant and changes with the change of the current and the temperature of the battery, if only a fixed value is used as the total capacity of the battery, for example, the nominal capacity of the battery is always used as the total capacity of the battery, the accuracy of estimating the capacity of the battery is seriously affected.
In one embodiment, a specific implementation of obtaining the calibration voltage is provided.
The specific flow of the battery capacity estimation method of this embodiment is shown in fig. 5, and step 501, step 503 to step 509 are substantially the same as step 401, step 403 to step 409, and are not repeated herein, except for step 502.
Specifically, there is a corresponding relationship between the current, the current temperature, and the calibration capacity of the battery and the calibration voltage, specifically, the corresponding calibration voltage is obtained in a polling manner. Taking the current temperature of the battery as 5 ℃ and the battery in the charging state as an example, the corresponding relationship among the current, the calibration capacity and the calibration voltage of the battery is specifically shown in table 2 below.
TABLE 2 correspondence between present Current, present temperature, and calibration Capacity of Battery and calibration Voltage
For example, taking the battery in a charged state, the current temperature is 5 ℃, and the nominal input/output current is equal to 120A, the current of the battery corresponding to 0.1C is 120A × 0.1 — 12A, that is, when the current of the battery is 12A and the calibrated capacity is 50mAh, the corresponding calibrated voltage is 2.95V, and when the input/output voltage of the battery reaches the calibrated voltage of 2.95V, the calibration module calibrates the current capacity of the battery to the calibrated capacity of 50mAh corresponding to 2.95V, so as to improve the accuracy of the battery capacity estimation.
In this embodiment, the calibration voltage of the battery is specifically obtained according to the information of the current, the current temperature, and the calibration capacity of the battery, and the calibration voltage obtained from multiple dimensions is more accurate, which is beneficial to more accurately estimating the current capacity of the battery.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
An embodiment of the present invention relates to a battery capacity estimation apparatus, connected to a battery, for calibrating an estimation result of a battery capacity, referring to fig. 6, the apparatus includes: the device comprises an acquisition module 1, a detection module 2 and a calibration module 3, wherein the acquisition module 1 is connected to the detection module 2, and the detection module 2 is connected to the calibration module 3.
The obtaining module 1 obtains a calibration voltage corresponding to the battery when the battery is in the calibration capacity, wherein each calibration capacity is distributed in a calibration range, the calibration range is smaller than or equal to the total capacity of the battery, the detecting module 2 detects whether the current voltage of the battery reaches the calibration voltage, and the calibrating module 3 calibrates the current capacity of the battery to the calibration capacity when determining that the current voltage of the battery reaches the calibration voltage.
Since the embodiment corresponding to fig. 1 corresponds to the present embodiment, the present embodiment can be implemented in cooperation with the embodiment corresponding to fig. 1. Related technical details mentioned in the embodiment corresponding to fig. 1 are still valid in this embodiment, and the technical effects that can be achieved in the embodiment corresponding to fig. 1 can also be achieved in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related art details mentioned in the present embodiment can also be applied to the embodiment corresponding to fig. 1.
In one embodiment, the calibration capacities are uniformly distributed in a calibration range, the intervals of the calibration capacities are larger than a preset value, the calibration range is smaller than the total capacity of the battery, and when the battery is in a charging state, the calibration range is 90% -100% of the total capacity of the battery; the calibration range is 0-10% of the total capacity of the battery when the battery is in a discharged state.
In this embodiment, each calibration capacity is uniformly distributed in the calibration range to stably calibrate the current capacity of the battery, and the interval of each calibration capacity in the correspondence relationship is increased, so that the calibration interval can be reduced to reduce the data amount to be processed by the system, thereby effectively improving the stability of the whole system. In addition, the calibration range is smaller than the total capacity of the battery, and compared with the capacity calibration in real time in the whole process, the data volume needing to be processed by the system can be further reduced, and the stability of the whole system is effectively improved. In addition, the method can calibrate the current capacity of the battery in real time when the battery is not fully charged (from 90% of the total capacity) or fully discharged (from 10% of the total capacity), so that the problem that some batteries cannot be fully charged or fully discharged is effectively avoided, calibration is performed by using calibration data of the battery in the fully charged or fully discharged state, and the accuracy of battery capacity estimation is effectively improved.
It should be noted that, all the modules involved in this embodiment are logic modules, and in practical application, one logic unit may be one physical unit, may also be a part of one physical unit, and may also be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, a unit which is not so closely related to solve the technical problem proposed by the present invention is not introduced in the present embodiment, but this does not indicate that there is no other unit in the present embodiment.
One embodiment of the invention relates to a calibrator, as shown in fig. 7, comprising at least one processor 701; and, a memory 702 communicatively coupled to the at least one processor 701; the memory 702 stores instructions executable by the at least one processor 701, and the instructions are executed by the at least one processor 701, so that the at least one processor 701 can execute the battery capacity estimation method in any of the embodiments.
Where the memory and processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting together one or more of the various circuits of the processor and the memory. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor.
The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.
One embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A battery capacity estimation method, comprising:
acquiring a corresponding calibration voltage when the battery is in a calibration capacity;
wherein each of the calibration capacities is distributed within a calibration range that is less than or equal to a total capacity of the battery;
detecting whether the current voltage of the battery reaches the calibration voltage;
calibrating a current capacity of the battery to the calibration capacity when the current voltage reaches the calibration voltage.
2. The battery capacity estimation method according to claim 1, wherein the calibration capacities are uniformly distributed within the calibration range, and an interval of each of the calibration capacities is greater than a preset value, and the calibration range is smaller than a total capacity of the battery.
3. The battery capacity estimation method of claim 2, wherein the calibration range is 90-100% of the total capacity when the battery is in a charged state; the calibration range is 0-10% of the total capacity when the battery is in a discharged state.
4. The battery capacity estimation method according to claim 1, wherein the battery includes at least two cell units;
before the detecting whether the current voltage of the battery reaches the calibration voltage, the method further includes:
detecting the voltage of each battery cell;
when the battery is in a charging state, taking the highest voltage of the voltages of the battery cell monomers as the current voltage;
and when the battery is in a discharging state, taking the lowest voltage of the voltages of the battery cell units as the current voltage.
5. The battery capacity estimation method of claim 1, wherein before obtaining the corresponding calibration voltage of the battery at the calibration capacity, further comprising:
acquiring the available capacity ratio according to the corresponding relation between the current and the current temperature of the battery and the available capacity ratio of the battery;
acquiring the total capacity according to the available capacity ratio and the nominal capacity of the battery;
wherein the available capacity ratio is a ratio of the total capacity to the nominal capacity.
6. The battery capacity estimation method according to any one of claims 1 to 5, wherein the obtaining of the calibration voltage corresponding to the battery when the battery is at the calibration capacity includes:
and acquiring the calibration voltage according to the preset corresponding relation among the current, the current temperature, the calibration capacity and the calibration voltage of the battery.
7. A battery capacity estimation device, characterized by comprising: the device comprises an acquisition module, a detection module and a calibration module; the acquisition module is connected with the detection module, and the detection module is connected with the calibration module;
the acquisition module is used for acquiring calibration voltage corresponding to a battery when the battery is in calibration capacity, wherein each calibration capacity is distributed in a calibration range, and the calibration range is smaller than or equal to the total capacity of the battery;
the detection module is used for detecting whether the current voltage of the battery reaches the calibration voltage or not;
the calibration module is configured to calibrate a current capacity of the battery to the calibration capacity when the current voltage reaches the calibration voltage.
8. The battery capacity estimation apparatus according to claim 7, wherein the calibration capacities are uniformly distributed within the calibration range, and an interval between each of the calibration capacities is greater than a preset value, the calibration range is smaller than a total capacity of the battery, and the calibration range is 90% to 100% of the total capacity when the battery is in a charged state; the calibration range is 0-10% of the total capacity when the battery is in a discharged state.
9. An aligner, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the battery capacity estimation method of any one of claims 1 to 6.
10. A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the battery capacity estimation method according to any one of claims 1 to 6.
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