CN111142032B - Method, device and equipment for determining battery electric quantity and storage medium - Google Patents
Method, device and equipment for determining battery electric quantity and storage medium Download PDFInfo
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- CN111142032B CN111142032B CN201911407655.XA CN201911407655A CN111142032B CN 111142032 B CN111142032 B CN 111142032B CN 201911407655 A CN201911407655 A CN 201911407655A CN 111142032 B CN111142032 B CN 111142032B
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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
Abstract
The embodiment of the invention provides a method, a device, equipment and a storage medium for determining battery electric quantity, wherein the method comprises the following steps: determining a real-time voltage of a target battery; if the target battery is in a discharging state, determining the residual capacity of the target battery based on the mapping relation between the real-time voltage and the target voltage electric quantity, wherein the target voltage electric quantity mapping relation is the mapping relation between the voltage and the residual capacity of the target battery; and if the target battery is in a charging state, determining the actual voltage of the target battery based on the mapping relation between the real-time voltage and the actual voltage of the target charging voltage, and determining the residual capacity of the target battery based on the mapping relation between the actual voltage of the target battery and the electric quantity of the target voltage, wherein the mapping relation between the actual voltage of the target charging voltage and the actual voltage of the target battery is the mapping relation between the charging voltage of the target battery and the actual voltage. According to the technical scheme of the embodiment of the invention, the problem of inaccurate electric quantity calculation caused by voltage and electric quantity curve difference during charging and discharging can be avoided.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a method, an apparatus, a device, and a storage medium for determining battery power.
Background
Lithium batteries have many advantages such as high energy, long service life, high rated voltage, low self-discharge rate, and light weight, and have been widely used in various electronic devices. The calculation of the electric quantity of the lithium battery is the basis of battery electric quantity management, and how to determine the electric quantity of the lithium battery becomes the focus of attention.
In one technical scheme, the remaining capacity Of the battery is obtained through a voltage-capacity curve Of the open-circuit voltage Of the battery corresponding to the State Of Charge (SOC). However, in this solution, the voltage-power curve varies greatly during charging and discharging, and as shown in fig. 1, the SOC varies greatly during charging and discharging under the same battery voltage, so that the error of the remaining power of the battery obtained from the voltage-power curve is relatively large.
Therefore, how to avoid the inaccurate power calculation caused by the curve difference of the voltage and the power during charging and discharging becomes a technical problem to be solved urgently.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for determining battery electric quantity, which are used for solving the problem of inaccurate electric quantity calculation caused by voltage and electric quantity curve difference during charging and discharging.
In a first aspect of the embodiments of the present invention, a method for determining battery power is provided, including: determining a real-time voltage of a target battery; if the target battery is in a discharging state, determining the residual capacity of the target battery based on a mapping relation between the real-time voltage and the target voltage capacity, wherein the target voltage capacity mapping relation is a mapping relation between the voltage and the residual capacity of the target battery acquired in advance; and if the target battery is in a charging state, determining the actual voltage of the target battery based on the mapping relation between the real-time voltage and the actual voltage of the target charging voltage, and determining the residual capacity of the target battery based on the mapping relation between the actual voltage of the target battery and the target voltage capacity, wherein the actual voltage mapping relation of the target charging voltage is the mapping relation between the charging voltage and the actual voltage of the target battery which are acquired in advance.
In some embodiments of the present invention, based on the above scheme, the target voltage electric quantity mapping relationship includes a target voltage electric quantity meter, and the method further includes: determining the discharge rate of the target battery; and according to the discharge multiplying power, determining the target voltage electricity meter corresponding to the target battery from a plurality of voltage electricity meters, wherein the voltage electricity meters comprise a plurality of voltages of the target battery measured in advance and corresponding residual electric quantity, and each voltage electricity meter is in one-to-one correspondence with each discharge multiplying power.
In some embodiments of the present invention, based on the above scheme, the method further includes: and generating the voltage electricity meter corresponding to each discharge rate in a plurality of discharge rates respectively aiming at the fully charged target battery.
In some embodiments of the present invention, based on the above scheme, the method further includes: determining a lowest operating voltage and a full-charge voltage of the target battery; and re-determining a target voltage electric quantity meter from the target voltage electric quantity meters based on the lowest working voltage and the full electric voltage.
In some embodiments of the present invention, based on the above scheme, the target charging voltage actual voltage mapping relationship includes a target charging voltage actual voltage table, and the method further includes: determining a charging rate of the target battery; and determining the target charging voltage actual voltmeter corresponding to the target battery from a plurality of charging voltage actual voltmeters according to the charging multiplying power, wherein the target charging voltage actual voltmeter comprises a plurality of charging voltages of the target battery measured in advance and corresponding actual voltages, and each charging voltage actual voltmeter corresponds to each charging multiplying power one by one.
In some embodiments of the present invention, based on the above scheme, the method further includes: and respectively generating the charging voltage actual voltmeter corresponding to each charging multiplying factor in a plurality of charging multiplying factors aiming at the target battery which is completely discharged.
In some embodiments of the present invention, based on the above scheme, the method further includes: filtering the residual electric quantity of the target battery to obtain the filtering electric quantity of the target battery; and carrying out reverse conversion on the filtering electric quantity to obtain the filtering voltage of the target battery.
In some embodiments of the present invention, based on the above scheme, the method further includes: if the target battery is in a charging state, determining whether a difference value between the filtering voltage and a full-charge voltage of the target battery is less than a preset threshold value; if the voltage is smaller than the preset threshold value, increasing the full-charge voltage of the target battery by a preset voltage amplitude; re-determining the filtering power amount and the filtering voltage of the target battery based on the increased full-charge voltage of the target battery.
In some embodiments of the present invention, based on the above scheme, the method further includes: judging whether the newly determined filtering voltage changes within a preset time period; and if the voltage changes, taking the newly determined filtering voltage as the full-charge voltage of the target battery.
In a second aspect of the embodiments of the present invention, there is provided a device for determining battery power, including: the real-time voltage determining module is used for determining the real-time voltage of the target battery; the first electric quantity determining module is used for determining the residual electric quantity of the target battery based on a mapping relation between the real-time voltage and the target voltage electric quantity if the target battery is in a discharging state, wherein the target voltage electric quantity mapping relation is a mapping relation between the voltage and the residual electric quantity of the target battery acquired in advance; and the second electric quantity determining module is used for determining the actual voltage of the target battery based on the mapping relation between the real-time voltage and the actual voltage of the target charging voltage if the target battery is in a charging state, and determining the residual electric quantity of the target battery based on the mapping relation between the actual voltage of the target battery and the electric quantity of the target voltage, wherein the actual voltage mapping relation of the target charging voltage is the mapping relation between the charging voltage and the actual voltage of the target battery which are acquired in advance.
In some embodiments of the present invention, based on the above scheme, the target voltage electric quantity mapping relationship includes a target voltage electric quantity meter, and the apparatus further includes: the discharge multiplying power determining module is used for determining the discharge multiplying power of the target battery; the first table selection module is used for determining the target voltage electricity meter corresponding to the target battery from a plurality of voltage electricity meters according to the discharge multiplying power, the voltage electricity meters comprise a plurality of voltages of the target battery measured in advance and corresponding residual electric quantity, and each voltage electricity meter corresponds to each discharge multiplying power one by one.
In some embodiments of the present invention, based on the above scheme, the apparatus further includes: and the voltage electricity meter generating module is used for respectively generating the voltage electricity meters corresponding to the discharge multiplying factors in the plurality of discharge multiplying factors aiming at the target battery which is fully charged.
In some embodiments of the present invention, based on the above scheme, the apparatus further includes: a re-determination module for determining a lowest operating voltage and a full-charge voltage of the target battery; and re-determining a target voltage electric quantity meter from the target voltage electric quantity meters based on the lowest working voltage and the full electric voltage.
In some embodiments of the present invention, based on the above scheme, the target charging voltage actual voltage mapping relationship includes a target charging voltage actual voltage table, and the apparatus further includes: the charging multiplying power determining module is used for determining the charging multiplying power of the target battery; and the second table selection module is used for determining the target charging voltage actual voltmeter corresponding to the target battery from a plurality of charging voltage actual voltmeters according to the charging multiplying power, wherein the target charging voltage actual voltmeter comprises a plurality of charging voltages of the target battery measured in advance and corresponding actual voltages, and each charging voltage actual voltmeter corresponds to each charging multiplying power one by one.
In some embodiments of the present invention, based on the above scheme, the apparatus further includes: and the charging voltage actual voltmeter generating module is used for respectively generating the charging voltage actual voltmeter corresponding to each charging multiplying factor in the plurality of charging multiplying factors aiming at the target battery which is completely discharged.
In some embodiments of the present invention, based on the above scheme, the apparatus further includes: the filtering processing module is used for carrying out filtering processing on the residual electric quantity of the target battery to obtain the filtering electric quantity of the target battery; and the reverse conversion module is used for performing reverse conversion on the filtering electric quantity to obtain the filtering voltage of the target battery.
In some embodiments of the present invention, based on the above scheme, the apparatus is configured to: if the target battery is in a charging state, determining whether a difference value between the filtering voltage and a full-charge voltage of the target battery is less than a preset threshold value; if the voltage is smaller than the preset threshold value, increasing the full-charge voltage of the target battery by a preset voltage amplitude; re-determining the filtering power amount and the filtering voltage of the target battery based on the increased full-charge voltage of the target battery.
In some embodiments of the present invention, based on the above scheme, the apparatus is further configured to: judging whether the newly determined filtering voltage changes within a preset time period; and if the voltage changes, taking the newly determined filtering voltage as the full-charge voltage of the target battery.
In a third aspect of the embodiments of the present invention, there is provided a device for determining battery power, including: a processor and a memory; the memory is used for storing computer programs and data, and the processor calls the computer programs stored in the memory to execute the method for determining the battery capacity provided by any embodiment of the first aspect.
A fourth aspect of the present invention provides a computer-readable storage medium comprising a computer program, which, when executed by a processor, is configured to perform the method for determining a battery level provided in any of the embodiments of the first aspect.
According to the method, the device, the equipment and the storage medium for determining the battery electric quantity, provided by the embodiment of the invention, on one hand, the same voltage electric quantity meter is used for calculating the residual electric quantity during charging and discharging, and the actual voltage of the target battery is obtained from the actual charging voltage meter under the charging condition, so that the problem of inaccurate electric quantity calculation caused by voltage and electric quantity curve difference during charging and discharging is avoided; on the other hand, the remaining capacity of the battery is calculated from the voltage information, not from the current information of the battery, so there is no problem of cumulative error in coulomb metering; on the other hand, the residual electric quantity is searched from the voltage electric quantity meter by selecting the proper voltage electric quantity meter and the charging voltage actual voltmeter, so that the problem of inaccurate electric quantity calculation caused by load intensity change is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a relationship between a battery voltage and a state of charge under a charging and discharging condition in a technical scheme;
fig. 2 is a schematic diagram of a relationship between battery voltage and state of charge under different loads during discharging according to a technical solution;
FIG. 3 is a schematic illustration of the cumulative error of coulometry in one embodiment;
fig. 4 is a flow chart illustrating a method for determining battery power according to some embodiments of the present invention;
fig. 5 is a flowchart illustrating a method for determining battery power according to another embodiment of the present invention;
fig. 6 is a schematic block diagram of a first embodiment of a device for determining battery power according to an embodiment of the present invention;
fig. 7 is a schematic block diagram of a second embodiment of the apparatus for determining battery power according to the present invention;
fig. 8 is a schematic block diagram of a third embodiment of the device for determining battery power according to the present invention;
fig. 9 is a schematic block diagram of a fourth embodiment of the device for determining battery power according to the present invention;
fig. 10 is a schematic block diagram of a fifth embodiment of the apparatus for determining battery power according to the present invention;
fig. 11 is a schematic block diagram of a sixth embodiment of a device for determining battery level according to an embodiment of the present invention;
fig. 12 is a schematic block diagram of a seventh embodiment of the device for determining the battery power according to the present invention;
fig. 13 is a schematic block diagram of embodiments of a battery level determination apparatus provided in accordance with some embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical terms used in the examples of the present invention are first explained below:
state of charge SOC: refers to the ratio of the remaining capacity of the battery to the total capacity.
Charging voltage: refers to the voltage of the battery in the charged state.
Actual voltage: refers to the voltage of the battery in a stable state after the battery is disconnected from charging for a certain time. When the battery is charged, the voltage of the battery has a phenomenon of being high in a virtual mode, namely the charging voltage is higher than the actual voltage. The magnitude of the charging voltage virtual high is different from the actual voltage, i.e. the actual voltage is non-linear with the charging voltage.
Discharge rate: the battery discharges a current value required for its rated capacity for a predetermined time. For example, when 20A for a battery having a rated capacity of 100A · h is discharged, the discharge rate is 0.2C.
Charging rate: the current value required for charging the battery to its rated capacity for a predetermined time.
At present, the battery technology of the lithium battery generally comprises an open circuit voltage method and a coulometric metering method. In the open-circuit voltage method, the electric quantity of the battery is determined by a voltage-electric quantity curve of the open-circuit voltage of the battery corresponding to the SOC. However, in the open circuit voltage method, as shown in fig. 1, the state of charge varies greatly between charge and discharge at the same battery voltage; referring to fig. 2, the state of charge difference is more obvious under different loads under the same battery voltage. Therefore, in the open circuit voltage method, the SOC difference is large under the same battery voltage and the state of charge difference is large under different loads, so that the error of the remaining capacity of the battery obtained from the voltage-capacity curve is large. For example, during the discharging process, the user is liable to have inaccurate estimation on the remaining service life of the battery, and may feel that the battery power is not durable; during charging, the battery capacity may decrease rapidly, during discharging, the battery capacity may increase rapidly, or the battery may not be charged for a long time.
In the coulometric method, a detection resistor is connected to a charge/discharge path of a battery, a voltage across the detection resistor is measured by an Analog-to-Digital Converter (ADC), the measured voltage is converted into a current value of the battery during charging or discharging, and the current value is integrated with time by a real-time counter, thereby knowing how much coulombs, i.e., electricity flows. The coulomb metering method can accurately calculate the SOC in real time during charging or discharging, and can calculate the state of charge (SOC is the remaining capacity/the full charge capacity) by calculating the remaining capacity and the full charge capacity through the charging coulomb counter and the discharging coulomb counter. However, coulometry suffers from the following disadvantages: (1) there is an accumulation of offset errors in the current sensing and ADC measurements, as shown in fig. 3, in practical applications, if no correction is made, the accumulated error over time is infinite; (2) the error of the Full Charging Capacity (FCC), which is the difference between the value of the designed capacity of the battery and the true Full charging capacity of the battery, is affected by temperature, aging, load, and the like.
Based on the above, the basic idea of the present invention is that when the battery is in the discharging process, the real-time voltage value of the battery is measured, and the remaining capacity of the battery is obtained by searching the target voltage electricity meter; and when the battery is in a charging process, measuring the real-time voltage value of the battery, obtaining the actual voltage value of the battery by searching the target charging voltage actual voltmeter, and obtaining the residual electric quantity of the battery by searching the target voltage ammeter. The target voltage electric quantity meter comprises a plurality of pre-acquired voltages of the target battery and corresponding residual electric quantity, and the target charging voltage actual electric quantity meter comprises a plurality of pre-acquired charging voltages of the target battery and corresponding actual voltages. Compared with an open-circuit voltage method, the technical scheme of the embodiment of the invention has the advantages that the same voltage electricity meter is used for calculating the residual electricity quantity during charging and discharging, and the actual voltage of the target battery is obtained from the actual charging voltage meter under the charging condition, so that the problem of inaccurate electricity quantity calculation caused by the voltage electricity quantity curve difference during charging and discharging is solved; by selecting a proper voltage electric quantity meter and a charging voltage actual voltmeter, the residual electric quantity is searched from the voltage electric quantity meter, and the problem of inaccurate electric quantity calculation caused by load intensity change is avoided. Compared with the coulometry method, in the technical scheme of the embodiment of the invention, the residual capacity of the battery is calculated through the voltage information, but not through the current information of the battery, so that the accumulative error in the coulometry method does not exist.
The method for determining the battery capacity according to the present invention is described in the following with several embodiments.
Fig. 4 is a flowchart illustrating a method for determining battery power according to some embodiments of the present invention.
Referring to fig. 4, in step S410, a real-time voltage of the target battery is determined.
In an example embodiment, the target battery is a lithium battery, and the real-time voltage of the target battery is determined through the analog-to-digital converter ADC. For example, the real-time voltage of the target cell is measured by an ADC or a separate ADC device provided in a Micro Controller Unit (MCU)/Central Processing Unit (CPU) and necessary hardware circuits.
In step S420, if the target battery is in a discharging state, the remaining capacity of the target battery is determined based on a mapping relationship between a real-time voltage of the target battery and a target voltage capacity, where the target voltage capacity mapping relationship is a mapping relationship between a voltage of the target battery and the remaining capacity, which is obtained in advance.
In an example embodiment, the target voltage power mapping relationship includes a target voltage power meter including a plurality of voltages of the target battery measured in advance and corresponding remaining power. And if the target battery is in a discharging state, based on the real-time voltage of the target battery, searching the residual electric quantity corresponding to the real-time voltage from the target voltage electric quantity meter.
Although the target voltage-to-electric-quantity mapping relationship is described as an example of the target voltage-to-electric-quantity meter, embodiments of the present invention are not limited to this, and for example, the target voltage-to-electric-quantity mapping relationship may be a voltage-to-electric-quantity key value pair, a voltage-to-electric-quantity two-dimensional array, or the like, which is not particularly limited in the present invention.
In step S430, if the target battery is in a charging state, determining an actual voltage of the target battery based on a mapping relationship between a real-time voltage of the target battery and an actual voltage of a target charging voltage, and determining a remaining capacity of the target battery based on the mapping relationship between the actual voltage of the target battery and the voltage capacity, wherein the mapping relationship between the actual voltage of the target battery and the charging voltage of the target battery is obtained in advance.
In an example embodiment, the target charging voltage actual voltage mapping relationship includes a target charging voltage actual voltage table including a plurality of charging voltages of the target battery measured in advance and corresponding actual voltages. And if the target battery is in a charging state, searching the actual voltage of the target battery from the actual voltage mapping relation of the target charging voltage based on the real-time voltage of the target battery, and searching the residual electric quantity of the target battery from the voltage electric quantity meter based on the searched actual voltage of the target battery.
Although the target charging voltage/electric quantity mapping relationship is described as an example of a target charging voltage/electric quantity table, the embodiment of the present invention is not limited to this, and for example, the target charging voltage/electric quantity mapping relationship may be a charging voltage/electric quantity key value pair, a charging voltage/electric quantity two-dimensional array, or the like, which is not particularly limited in the present invention.
According to the technical scheme in the example embodiment of fig. 4, on one hand, the same voltage electricity meter is used for charging and discharging to calculate the remaining electricity quantity, and in the charging situation, the actual voltage of the target battery is obtained from the actual charging voltage meter, so that the problem of inaccurate electricity quantity calculation caused by the difference of voltage electricity quantity curves in charging and discharging is avoided; on the other hand, the remaining capacity of the battery is calculated from the voltage information, not from the current information of the battery, so there is no problem of cumulative error in coulomb metering; on the other hand, the residual electric quantity is searched from the voltage electric quantity meter by selecting the proper voltage electric quantity meter and the charging voltage actual voltmeter, so that the problem of inaccurate electric quantity calculation caused by load intensity change is avoided.
Further, in an example embodiment, the method of determining the battery power further includes: and respectively generating a voltage electricity meter corresponding to each discharge rate in the plurality of discharge rates aiming at the fully charged target battery, wherein the voltage electricity meter comprises a plurality of voltages of the target battery measured in advance and corresponding residual electric quantity, and each voltage electricity meter is in one-to-one correspondence with each discharge rate. For example, a "voltage electricity meter" at a discharge rate of 0.1C, 0.2C, 0.5C, 1.0C, 2.0C, etc. can be measured by an existing measuring device or a self-made jig according to an "ampere-hour integration method" (integration of current over time), respectively, for a fully charged lithium battery, and data in the voltage electricity meter consists of voltages with certain difference and corresponding residual electricity, the interval voltages include, but are not limited to, 20mV, 50mV, and 100mV, and the voltages in the voltage electricity meter cover the full-range working voltage of the target battery. During the measurement, it is not necessary to disconnect the discharge load of the target battery.
Further, in order to accurately determine the voltage electricity meter corresponding to the target battery, the method for determining the battery electricity quantity further includes: determining the discharge rate of the target battery; and determining a target voltage electric quantity meter corresponding to the target battery from the plurality of voltage electric quantity meters according to the discharge rate of the target battery. For example, by measuring or evaluating the average current of the target battery, the voltage electricity meter corresponding to the discharge rate closest to the average current is selected from the plurality of voltage electricity meters, or the target discharge rate of the target battery is determined based on the average current, and the voltage electricity meter corresponding to the discharge rate closest to the target discharge rate is selected.
Further, in an example embodiment, the method of determining the battery power further includes: and aiming at the target battery which is completely discharged, generating a charging voltage actual voltmeter corresponding to each charging multiplying factor in the plurality of charging multiplying factors respectively, wherein the target charging voltage actual voltmeter comprises a plurality of charging voltages of the target battery which are measured in advance and corresponding actual voltages, and each charging voltage actual voltmeter is in one-to-one correspondence with each charging multiplying factor. For example, the "actual charging voltage meters" at the charging rates of 0.1C, 0.2C, 0.5C, 1.0C, 2.0C, etc. are respectively measured for the lithium batteries that are completely discharged by the existing measuring equipment or the self-made jig. The data in the charging voltage actual voltmeter consists of charging voltages separated by a certain difference and corresponding actual voltages, and the separated voltages include, but are not limited to, 20mV, 50mV and 100 mV. When the battery is charged to the preset charging voltage value, the charging of the battery is disconnected, the waiting time includes but is not limited to 60s, 120s and 180s until the voltage of the battery is stable, namely the actual voltage of the battery, the charging voltage value and the actual voltage value are recorded, and the operation is repeated until all the preset charging voltages and the corresponding actual voltages are measured. The actual voltage corresponding to the measured predetermined charging voltage needs to cover the full range of operating voltage of the battery.
Further, in an example embodiment, in order to accurately determine the actual voltmeter of the charging voltage corresponding to the target electric quantity, the method for determining the battery electric quantity further includes: determining a charging rate of the target battery; and determining a target charging voltage actual voltmeter corresponding to the target battery from the plurality of charging voltage actual voltmeters according to the charging multiplying power. For example, the corresponding charging voltage actual voltmeter is selected from the plurality of charging voltage actual voltmeters according to the battery charging rate of the hardware design of the target battery.
In addition, the full-charge voltage of the battery is changed due to problems such as battery aging after the battery is used for a period of time. Therefore, in an example embodiment, the method of determining the battery charge further comprises: determining the lowest working voltage and full-electricity voltage of a target battery; and re-determining a new target voltage electric quantity meter from the target voltage electric quantity meters based on the lowest working voltage and the full electric voltage. For example, as the battery is charged, as the actual voltage of the battery approaches a full charge voltage (i.e., the actual voltage of the battery at the last full charge), the full charge voltage of the battery is increased by a range including, but not limited to, 1mV, 3mV, and 5 mV. After the actual voltage of the battery is maintained at a certain value for a certain time, the maintained time includes but is not limited to 5min, 10min and 15min, or after a charging indication pin of a charging Integrated Circuit (IC) becomes an invalid level, the actual voltage of the battery at this time is used as a new full-charge voltage, so that the dynamic intelligent adjustment of the full-charge voltage of the battery is realized, and the change of the full-charge voltage of the battery caused by the problems of battery aging and the like can be solved.
Further, according to the lowest working voltage of the battery (for example, the lowest working voltage given by a battery management system) and the full-electricity voltage of the battery, the target voltage electricity meter is intercepted, the battery residual electricity amount corresponding to the lowest working voltage of the battery is redefined to be 0%, and the battery residual electricity amount corresponding to the full-electricity voltage of the battery is redefined to be 100%, on the basis, the intercepted voltage electricity meter is uniformly stretched, and the residual electricity amount value corresponding to each voltage is recalculated to obtain a new voltage electricity meter.
In the technical scheme of the embodiment of the invention, the new voltage and electricity meter is re-determined according to the lowest working voltage and the full-electricity voltage of the battery, and the new voltage and electricity meter can be dynamically determined according to the actual full-electricity voltage of the battery, so that the residual electricity quantity of the battery can be more accurately determined.
Further, in an example embodiment, in order to more accurately determine the remaining capacity of the target battery, the battery capacity determination method further includes: carrying out filtering processing on the residual electric quantity of the target battery; and performing reverse conversion on the filtered residual electric quantity to obtain the voltage of the target battery. The filtering method includes, but is not limited to, mean filtering, median filtering, weighted filtering, first-order low-pass filtering, second-order low-pass filtering, and the like. For example, when the battery is in a discharging state, according to the real-time voltage of the battery, by searching a new voltage-to-electricity meter, the remaining battery power is obtained, filtering is performed on the remaining battery power to obtain a filtered remaining battery power, the filtered remaining battery power is reversely converted to obtain a corresponding filtered voltage, and finally, the filtered battery voltage and the filtered remaining battery power are obtained. When the battery is in a charging state, obtaining an actual voltage value of the battery by searching a charging voltage actual voltmeter according to the real-time voltage of the battery, then obtaining the residual electric quantity of the battery by searching a new voltage electric meter according to the actual voltage value of the battery, and filtering the obtained residual electric quantity to obtain the filtered residual electric quantity of the battery; and performing reverse conversion on the filtered battery residual capacity to obtain corresponding filtered voltage, and finally obtaining the filtered battery voltage and the filtered battery residual capacity.
Fig. 5 is a flowchart illustrating a method for determining battery power according to another embodiment of the present invention.
Referring to fig. 5, in step S510, a real-time voltage of the target battery is collected. For example, the real-time voltage of the target battery is collected by the ADC.
In step S515, it is determined whether the target battery is in a charged state, and if so, the process proceeds to step S520, and then proceeds to step S525; if not, the process proceeds to step S525.
In step S520, the charging voltage actual voltmeter is searched based on the real-time voltage of the target battery, and the actual voltage of the target battery is determined.
In step S525, a voltage-to-electricity meter is searched based on the real-time voltage or the actual voltage of the target battery, and the remaining capacity of the target battery is determined. For example, in a charging state, a voltage electricity meter is searched based on the actual voltage of the target battery; and in the discharging state, searching a voltage kilowatt-hour meter based on the real-time voltage of the target battery.
In step S530, the obtained remaining capacity of the target battery is filtered to obtain a filtered remaining capacity of the target battery. The filtering process includes, but is not limited to, mean filtering, median filtering, weighted filtering, first order low pass, second order low pass, and the like.
In step S535, the filtered voltage of the target battery is determined by the filtered remaining capacity of the target battery. For example, the filtered remaining capacity is reversely converted to obtain the filtered voltage of the target battery.
In step S540, it is determined whether the target battery is in a charged state, and if it is in the charged state, it proceeds to step S545; if not, the process proceeds to step S565.
In step S545, it is determined whether the filtered voltage of the target battery is close to the full-charge voltage of the target battery (i.e., the actual voltage of the battery at the last full charge), and if it is close to the full-charge voltage, it proceeds to step S550; if not, the process proceeds to step S555.
In step S550, the full-power voltage is adjusted up appropriately, and the filtered remaining power and voltage are recalculated. For example, increasing the amplitude includes, but is not limited to, 1mV, 3mV, 5mV, recalculating the filtered remaining capacity and voltage of the battery.
In step S555, it is determined whether the filtered voltage remains unchanged for a predetermined time period, and if the filtered voltage remains unchanged, the process proceeds to step S560; if so, the process proceeds to step S565.
In step S560, the current filtered voltage of the target battery is used as the full charge voltage, and the filtered remaining capacity and the filtered voltage of the target battery are recalculated. For example, according to the lowest working voltage and the full-electricity voltage of the battery, the target voltage electricity meter is intercepted, the intercepted voltage electricity meter is uniformly stretched, and the residual electricity value corresponding to each voltage is recalculated to obtain a new voltage electricity meter.
Through steps S540 to S560, the full-charge voltage of the battery can be dynamically and intelligently adjusted, so that the change of the full-charge voltage of the battery caused by problems such as battery aging or battery replacement can be dealt with, and further, the electric quantity can be more accurately calculated.
In step S565, the voltage and the amount of power during charging of the target battery are limited to be larger and smaller during discharging. Therefore, the problem that the electric quantity of the battery is reduced when the battery is charged and the electric quantity of the battery is increased when the battery is pulled out during charging can be avoided.
Fig. 6 is a schematic block diagram of a battery level determination apparatus provided in accordance with some embodiments of the present invention. Referring to fig. 6, the battery level determining apparatus 600 includes:
a real-time voltage determination module 610 for determining a real-time voltage of the target battery; a first electric quantity determining module 620, configured to determine, if the target battery is in a discharging state, a remaining electric quantity of the target battery based on a mapping relationship between the real-time voltage and a target voltage electric quantity, where the target voltage electric quantity mapping relationship is a mapping relationship between a voltage of the target battery and the remaining electric quantity, which is obtained in advance; a second electric quantity determining module 630, configured to determine, if the target battery is in a charging state, an actual voltage of the target battery based on a mapping relationship between the real-time voltage and an actual voltage of a target charging voltage, and determine a remaining electric quantity of the target battery based on a mapping relationship between the actual voltage of the target battery and the target voltage electric quantity, where the target charging voltage actual voltage mapping relationship is a mapping relationship between a charging voltage and an actual voltage of the target battery obtained in advance.
In some embodiments of the present invention, based on the above scheme, referring to fig. 7, the target voltage electric quantity mapping relationship includes a target voltage electric quantity meter, and the apparatus 600 further includes: a discharge rate determining module 710, configured to determine a discharge rate of the target battery; the first table selecting module 720 is configured to determine the target voltage electricity meter corresponding to the target battery from a plurality of voltage electricity meters according to the discharge rate, where the voltage electricity meters include a plurality of voltages of the target battery and corresponding remaining power amounts, which are measured in advance, and each voltage electricity meter corresponds to each discharge rate one to one.
In some embodiments of the present invention, based on the above scheme, referring to fig. 8, the apparatus 600 further includes: a voltage-to-electricity meter generating module 810, configured to generate, for the fully charged target battery, the voltage-to-electricity meter corresponding to each discharge rate of the plurality of discharge rates, respectively.
In some embodiments of the present invention, based on the above scheme, referring to fig. 9, the apparatus 600 further includes: a re-determination module 910, configured to determine a lowest operating voltage and a full-electricity voltage of the target battery; and re-determining a target voltage electric quantity meter from the target voltage electric quantity meters based on the lowest working voltage and the full electric voltage.
In some embodiments of the present invention, based on the above scheme, the target charging voltage actual voltage mapping relationship includes a target charging voltage actual voltage table, and referring to fig. 10, the apparatus 600 further includes: a charging rate determining module 1010, configured to determine a charging rate of the target battery; a second table selecting module 1020, configured to determine, according to the charging factor, an actual target charging voltage voltmeter corresponding to the target battery from a plurality of actual charging voltage voltmeters, where the actual target charging voltage voltmeter includes a plurality of charging voltages of the target battery measured in advance and corresponding actual voltages, and each actual charging voltage voltmeter corresponds to each charging factor.
In some embodiments of the present invention, based on the above scheme, referring to fig. 11, the apparatus 600 further includes: a charging voltage actual voltmeter generating module 1110, configured to generate, for the target battery that is completely discharged, the charging voltage actual voltmeter corresponding to each charging magnification of the plurality of charging magnifications, respectively.
In some embodiments of the present invention, based on the above scheme, referring to fig. 12, the apparatus 600 further includes: a filtering processing module 1210, configured to perform filtering processing on the remaining power of the target battery to obtain a filtering power of the target battery; and the reverse conversion module 1220 is configured to perform reverse conversion on the filtering electric quantity to obtain a filtering voltage of the target battery.
In some embodiments of the present invention, based on the above scheme, the apparatus is configured to: if the target battery is in a charging state, determining whether a difference value between the filtering voltage and a full-charge voltage of the target battery is less than a preset threshold value; if the voltage is smaller than the preset threshold value, increasing the full-charge voltage of the target battery by a preset voltage amplitude; re-determining the filtering power amount and the filtering voltage of the target battery based on the increased full-charge voltage of the target battery.
In some embodiments of the present invention, based on the above scheme, the apparatus is further configured to: judging whether the newly determined filtering voltage changes within a preset time period; and if the voltage changes, taking the newly determined filtering voltage as the full-charge voltage of the target battery.
The device for determining the battery power provided by the embodiment of the application can realize each process in the foregoing method embodiments, and achieve the same functions and effects, which are not repeated here.
Fig. 13 is a schematic structural diagram of a first embodiment of a device for determining battery power according to some embodiments of the present invention, and as shown in fig. 13, a device 1300 for determining battery power according to this embodiment may include: a memory 1310, and a processor 1320.
Optionally, the battery level determining device may further include a bus. Wherein, the bus is used for realizing the connection between each element.
The memory 1310 is used for storing computer programs and data, and the processor 1320 invokes the computer programs stored in the memory to execute the technical solution of the method for determining the battery level provided by any of the foregoing method embodiments.
Wherein the memory 1310 and the processor 1320 are electrically connected, directly or indirectly, to enable transmission or interaction of data. For example, the components may be electrically connected to each other via one or more communication buses or signal lines, such as a bus. The memory stores computer-executable instructions for implementing the data access control method, and includes at least one software functional module which can be stored in the memory in the form of software or firmware, and the processor executes various functional applications and determination of battery level by running the computer program and the module stored in the memory.
The Memory may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory is used for storing programs, and the processor executes the programs after receiving the execution instructions. Further, the software programs and modules within the aforementioned memories may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.
The processor may be an integrated circuit chip having signal processing capabilities. The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. It will be appreciated that the configuration of fig. 13 is merely illustrative and may include more or fewer components than shown in fig. 13 or have a different configuration than shown in fig. 13. The components shown in fig. 13 may be implemented in hardware and/or software.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, can implement the method for determining the battery power provided in any of the above method embodiments.
The computer-readable storage medium in this embodiment may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, etc. that is integrated with one or more available media, and the available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., SSDs), etc.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for determining battery charge, comprising:
determining a real-time voltage of a target battery;
if the target battery is in a discharging state, determining the residual capacity of the target battery based on a mapping relation between the real-time voltage and the target voltage capacity, wherein the target voltage capacity mapping relation is a mapping relation between the voltage and the residual capacity of the target battery acquired in advance;
if the target battery is in a charging state, determining the actual voltage of the target battery based on the mapping relation between the real-time voltage and the actual voltage of the target charging voltage, and determining the residual capacity of the target battery based on the mapping relation between the actual voltage of the target battery and the target voltage capacity, wherein the actual voltage mapping relation of the target charging voltage is the mapping relation between the charging voltage and the actual voltage of the target battery which are acquired in advance;
filtering the residual electric quantity of the target battery to obtain the filtering electric quantity of the target battery;
carrying out reverse conversion on the filtering electric quantity to obtain the filtering voltage of the target battery;
if the target battery is in a charging state, determining whether a difference value between the filtering voltage and a full-charge voltage of the target battery is less than a preset threshold value;
if the voltage is smaller than the preset threshold value, increasing the full-charge voltage of the target battery by a preset voltage amplitude;
re-determining the filtering power amount and the filtering voltage of the target battery based on the increased full-charge voltage of the target battery.
2. The method of claim 1, wherein the target voltage charge map comprises a target voltage charge table, the method further comprising:
determining the discharge rate of the target battery;
and according to the discharge multiplying power, determining the target voltage electricity meter corresponding to the target battery from a plurality of voltage electricity meters, wherein the voltage electricity meters comprise a plurality of voltages of the target battery measured in advance and corresponding residual electric quantity, and each voltage electricity meter is in one-to-one correspondence with each discharge multiplying power.
3. The method of claim 2, further comprising:
and generating the voltage electricity meter corresponding to each discharge rate in a plurality of discharge rates respectively aiming at the fully charged target battery.
4. The method of claim 2, further comprising:
determining a lowest operating voltage and a full-charge voltage of the target battery;
and re-determining a target voltage electric quantity meter from the target voltage electric quantity meters based on the lowest working voltage and the full electric voltage.
5. The method of claim 1, wherein the target charging voltage actual voltage mapping comprises a target charging voltage actual voltage table, the method further comprising:
determining a charging rate of the target battery;
and determining the target charging voltage actual voltmeter corresponding to the target battery from a plurality of charging voltage actual voltmeters according to the charging multiplying power, wherein the target charging voltage actual voltmeter comprises a plurality of charging voltages of the target battery measured in advance and corresponding actual voltages, and each charging voltage actual voltmeter corresponds to each charging multiplying power one by one.
6. The method of claim 5, further comprising:
and respectively generating the charging voltage actual voltmeter corresponding to each charging multiplying factor in a plurality of charging multiplying factors aiming at the target battery which is completely discharged.
7. The method of claim 1, further comprising:
judging whether the newly determined filtering voltage changes within a preset time period;
and if the voltage changes, taking the newly determined filtering voltage as the full-charge voltage of the target battery.
8. An apparatus for determining a charge level of a battery, comprising:
the real-time voltage determining module is used for determining the real-time voltage of the target battery;
the first electric quantity determining module is used for determining the residual electric quantity of the target battery based on a mapping relation between the real-time voltage and the target voltage electric quantity if the target battery is in a discharging state, wherein the target voltage electric quantity mapping relation is a mapping relation between the voltage and the residual electric quantity of the target battery acquired in advance;
the second electric quantity determining module is used for determining the actual voltage of the target battery based on the mapping relation between the real-time voltage and the actual voltage of the target charging voltage and determining the residual electric quantity of the target battery based on the mapping relation between the actual voltage of the target battery and the electric quantity of the target voltage if the target battery is in a charging state, wherein the actual voltage mapping relation of the target charging voltage is the mapping relation between the charging voltage and the actual voltage of the target battery which are acquired in advance;
the filtering processing module is used for carrying out filtering processing on the residual electric quantity of the target battery to obtain the filtering electric quantity of the target battery;
the reverse conversion module is used for performing reverse conversion on the filtering electric quantity to obtain the filtering voltage of the target battery;
the filtering processing module is specifically configured to:
if the target battery is in a charging state, determining whether a difference value between the filtering voltage and a full-charge voltage of the target battery is less than a preset threshold value;
if the voltage is smaller than the preset threshold value, increasing the full-charge voltage of the target battery by a preset voltage amplitude;
re-determining the filtering power amount and the filtering voltage of the target battery based on the increased full-charge voltage of the target battery.
9. A battery level determining apparatus, comprising: a processor and a memory; the memory is used for storing computer programs and data, and the processor calls the computer programs stored by the memory to execute the battery charge amount determination method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a computer program which, when being executed by a processor, is adapted to carry out the method of determining the battery power according to any one of claims 1 to 7.
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| CN113725934A (en) * | 2020-05-26 | 2021-11-30 | Oppo广东移动通信有限公司 | Method and device for determining display electric quantity, electronic equipment and storage medium |
| CN112104015B (en) * | 2020-08-18 | 2021-10-29 | 深圳易马达科技有限公司 | Battery charging method and device, terminal equipment and storage medium |
| CN116699422B (en) * | 2022-12-30 | 2024-04-02 | 荣耀终端有限公司 | Battery electric quantity calculating method and related device |
| CN116430255B (en) * | 2023-03-27 | 2024-02-09 | 广州通则康威科技股份有限公司 | Battery electric quantity self-adaptive display method, device, storage medium and system |
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