CN112462268A - Method and device for measuring battery electric quantity and electric equipment - Google Patents
Method and device for measuring battery electric quantity and electric equipment Download PDFInfo
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- CN112462268A CN112462268A CN202011495712.7A CN202011495712A CN112462268A CN 112462268 A CN112462268 A CN 112462268A CN 202011495712 A CN202011495712 A CN 202011495712A CN 112462268 A CN112462268 A CN 112462268A
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- 238000010586 diagram Methods 0.000 description 14
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- 238000010408 sweeping Methods 0.000 description 3
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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]
- G01R31/367—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
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Abstract
The invention discloses a method, a device and electric equipment for measuring battery electric quantity, wherein the method comprises the steps of firstly, acquiring the power consumption mode of an electric equipment; calling a corresponding relation curve of the voltage and the electric quantity corresponding to the power utilization mode according to the power utilization mode; acquiring the voltage corresponding to the battery in the power utilization mode; and then, the residual electric quantity is obtained according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity, so that the accurate measurement of the electric quantity of the battery in different power utilization modes is realized, and the cost is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of battery electric quantity measurement, in particular to a method and a device for measuring battery electric quantity and electric equipment.
Background
At present, wired household appliances such as a dust collector have a limitation on cleaning range due to the limitation of a power cord, and the cleaning action is inconvenient because the power cord needs to be considered all the time. Therefore, the wireless dust collector is provided with a power supply, the cleaning range and the cleaning action are more free, and the battery power detection is needed in order to prevent the user from being influenced by the power shortage of the battery. The existing detection methods mainly comprise two methods, one method is the traditional voltage method detection, namely, the voltage is converted into the corresponding battery capacity by detecting the battery voltage, and the method for simply detecting the battery voltage has the defects of unstable voltage measurement and low detection precision due to the instability of a load; the other method is coulomb detection, which improves the detection precision but greatly increases the manufacturing cost.
Disclosure of Invention
The invention provides a method and a device for measuring battery electric quantity and electric equipment, which aim to realize the accuracy of electric quantity measurement in different power consumption modes.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for measuring battery capacity, including the following steps:
acquiring the power utilization mode of an electric appliance;
calling a corresponding relation curve of voltage and electric quantity corresponding to the power utilization mode according to the power utilization mode;
acquiring voltage corresponding to the battery in the power utilization mode;
and acquiring the residual electric quantity according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity.
Optionally, before acquiring the power consumption mode of the electrical appliance, the method further includes:
and establishing a corresponding relation curve of the voltage and the electric quantity in different power utilization modes.
Optionally, the establishing a corresponding relationship curve between voltage and electric quantity in different power consumption modes includes:
in the same power utilization mode, circularly charging and discharging a battery, wherein the number of cycles is a first preset number, and a plurality of corresponding relation curves of voltage and electric quantity in the power utilization mode are obtained;
acquiring a corresponding relation curve of the voltage and the electric quantity in the power consumption mode according to the corresponding relation curves of the voltage and the electric quantity;
and repeating the steps to obtain the corresponding relation curve of the voltage and the electric quantity in different power consumption modes.
Optionally, the performing cycle charging and discharging on the battery in the same power consumption mode, where the cycle number is a first preset number, and the obtaining of the multiple corresponding relationship curves between the voltage and the electric quantity in the power consumption mode includes:
charging a battery under the condition of constant current and constant voltage, recording the voltage and the electric quantity of the battery in real time, and stopping charging when the voltage of the battery reaches a first preset voltage;
standing the battery for a first preset time;
discharging the battery under constant power, recording the voltage and the electric quantity of the battery in real time, and stopping discharging when the voltage of the battery reaches a second preset voltage;
standing the battery for a second preset time;
and repeating the steps for the first preset times to obtain a plurality of corresponding relation curves of the voltage and the electric quantity in the power consumption mode.
Optionally, the obtaining the corresponding relationship curve of the voltage and the electric quantity in the power consumption mode according to the corresponding relationship curves of the voltage and the electric quantity includes:
and performing average fitting on the corresponding relation curves of the plurality of voltages and the electric quantity to obtain the corresponding relation curve of the voltages and the electric quantity in the power consumption mode.
Optionally, after obtaining the remaining power, the method further includes:
acquiring the current charging and discharging times of the battery;
calling a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery;
and correcting the percentage of the residual electric quantity according to the current charging and discharging times of the battery and a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery.
Optionally, before the obtaining of the corresponding relationship curve between the rated electric quantity and the number of charging and discharging times of the battery, the method further includes:
the battery is charged and discharged circularly, and the circulating frequency is a second preset frequency;
and establishing a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery.
Optionally, the second preset number of times is greater than or equal to 20 times.
In order to achieve the above object, an embodiment of the second aspect of the present invention further provides a device for measuring battery capacity, including:
the power consumption mode acquisition module is used for acquiring the power consumption mode of the electrical appliance;
the calling module is used for calling a corresponding relation curve of voltage and electric quantity corresponding to the power utilization mode according to the power utilization mode;
the voltage acquisition module is used for acquiring the voltage corresponding to the battery in the power utilization mode;
and the electric quantity acquisition module is used for acquiring the residual electric quantity according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity.
In order to achieve the above object, the third embodiment of the present invention further provides an electric device, which includes the above battery capacity measuring apparatus.
According to the method, the device and the electric equipment for measuring the battery electric quantity, which are provided by the embodiment of the invention, firstly, the power consumption mode of the electric equipment is obtained; calling a corresponding relation curve of the voltage and the electric quantity corresponding to the power utilization mode according to the power utilization mode; acquiring the voltage corresponding to the battery in the power utilization mode; and then, the residual electric quantity is obtained according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity, so that the accurate measurement of the electric quantity of the battery in different power utilization modes is realized, and the cost is reduced.
Drawings
Fig. 1 is a flowchart of a method for measuring battery capacity according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for measuring battery capacity according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for measuring battery capacity according to another embodiment of the present invention;
fig. 4 is a flowchart of a method for measuring battery capacity according to another embodiment of the present invention;
fig. 5 is a flowchart of a method for measuring battery capacity according to still another embodiment of the present invention;
fig. 6 is a flowchart of a method for measuring battery capacity according to still another embodiment of the present invention;
fig. 7 is a flowchart of a method for measuring battery power according to still another embodiment of the present invention;
FIG. 8 is a block diagram of a device for measuring battery power according to an embodiment of the present invention;
fig. 9 is a block diagram of a device for measuring battery level according to an embodiment of the present invention;
fig. 10 is a block diagram of a battery charge measuring device according to another embodiment of the present invention;
FIG. 11 is a block diagram of a battery charge measuring device according to another embodiment of the present invention;
FIG. 12 is a block diagram of a battery charge measuring device according to yet another embodiment of the present invention;
FIG. 13 is a block diagram of a battery charge measurement apparatus according to yet another embodiment of the present invention;
fig. 14 is a block diagram of a battery charge measuring device according to still another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a method for measuring battery capacity according to an embodiment of the present invention. As shown in fig. 1, the method for measuring the battery capacity includes the following steps:
s101, acquiring the power consumption mode of an electric appliance;
it should be noted that the electrical appliances in step S101 may be electrical appliances that carry a mobile power supply and have different power consumption gears, such as a vacuum cleaner, a humidifier, and a sweeping robot. The power mode is understood to mean different power consumption steps. Different consumers of the electrical consumer or different powers of use can also be understood.
S102, calling a corresponding relation curve of voltage and electric quantity corresponding to the power utilization mode according to the power utilization mode;
in the following, the electric appliance is taken as an example of a vacuum cleaner, wherein the vacuum cleaner has three power utilization modes of high-grade, medium-grade and low-grade. It can be understood that each power consumption mode corresponds to a corresponding relation curve of voltage and electric quantity. For example, after the power consumption mode of the dust collector is a high-grade power consumption mode, a corresponding relation curve of voltage and electric quantity corresponding to the high-grade power consumption mode is called according to the high-grade power consumption mode; when the power utilization mode of the dust collector is the middle-grade power utilization mode, calling a corresponding relation curve of voltage and electric quantity corresponding to the middle-grade power utilization mode according to the middle-grade power utilization mode; and when the power utilization mode of the dust collector is the low-gear power utilization mode, calling a corresponding relation curve of the voltage and the electric quantity corresponding to the low-gear power utilization mode according to the low-gear power utilization mode.
S103, acquiring a voltage corresponding to the battery in the power utilization mode;
and S104, acquiring the residual electric quantity according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity.
Still taking the vacuum cleaner as an example, when the power consumption mode of the vacuum cleaner is the high-grade power consumption mode, the corresponding relation curve of the voltage and the electric quantity corresponding to the high-grade power consumption mode is called, at this time, the voltage of the current battery is detected, and the current electric quantity of the battery is obtained according to the corresponding relation curve of the voltage and the electric quantity in the high-grade power consumption mode.
The electric quantity in the corresponding relation curve between the voltage and the electric quantity in step S104 is the used electric quantity, and when the battery is actually used, the remaining electric quantity is obtained according to the used electric quantity, and for convenience of a user, the remaining electric quantity is often converted into a remaining electric quantity percentage, that is, (rated electric quantity-used electric quantity)/rated electric quantity, and the rated electric quantity is the rated capacity of the battery.
Fig. 2 is a flowchart of a method for measuring battery capacity according to an embodiment of the present invention. Optionally, as shown in fig. 2, before step S101, that is, before obtaining the power consumption mode of the electrical appliance, the method further includes:
and S100, establishing a corresponding relation curve of the voltage and the electric quantity in different power utilization modes.
Fig. 3 is a flowchart of a method for measuring battery capacity according to another embodiment of the present invention. Optionally, as shown in fig. 3, the step S100 includes that establishing a corresponding relationship curve between voltage and electric quantity in different power consumption modes includes:
s105, circularly charging and discharging the battery in the same power utilization mode, wherein the number of the circulation is a first preset number, and a plurality of corresponding relation curves of voltage and electric quantity in the power utilization mode are obtained;
wherein, in order to satisfy the usability of collecting the sample, the first preset number is at least 21.
Fig. 4 is a flowchart of a method for measuring battery capacity according to another embodiment of the present invention. Optionally, as shown in fig. 4, the step S105 includes, in the same power consumption mode, performing cycle charging and discharging on the battery, where the cycle time is a first preset time, and acquiring multiple corresponding relationship curves of voltage and power in the power consumption mode includes:
in the same power consumption mode, that is, in the same power consumption, the power consumption will be described as 5W.
S1051, charging the battery under the condition of constant current and constant voltage, recording the voltage and the electric quantity of the battery in real time, and stopping charging when the voltage of the battery reaches a first preset voltage;
the first preset voltage may be 4.2V, that is, the battery voltage reaches a preset full charge voltage of 4.2V, and the off-current of the charge may be 50 mA. The voltage and the electric quantity of the battery are recorded in real time, a circulating battery core tester can be used for recording, and the electric quantity in the step S1051 is the actual electric quantity of the battery, namely the electric quantity of the battery which is charged.
S1052, standing the battery for a first preset time;
the first preset time may be 10 minutes, so that the fully charged state of the battery tends to be stable.
S1053, discharging the battery under constant power, recording the voltage and the electric quantity of the battery in real time, and stopping discharging when the voltage of the battery reaches a second preset voltage;
the second preset voltage may be 2.8V, that is, the battery stops discharging when the battery voltage reaches the preset discharge cut-off voltage of 2.8V. The voltage and the electric quantity of the battery can be recorded in real time by using a circulating electric core tester, wherein the constant power can be 5W, the constant power can also be set by using the circulating electric core tester, and the electric quantity in the step S1053 is the used electric quantity.
S1054, standing the battery for a second preset time;
the second preset time may be 10 minutes, which is a time when the battery is discharged and the state of the battery is stable.
And S1055, repeating the steps for the first preset times, and obtaining a plurality of corresponding relation curves of the voltage and the electric quantity in the power consumption mode.
It should be noted that, after repeating steps S1051 to S1054 at least 21 times, the battery is charged at least 21 times, and the battery is discharged at least 21 times, so that a corresponding relationship curve of the voltage and the electric quantity of at least 21 batteries in the charging process and a corresponding relationship curve of the voltage and the electric quantity of at least 21 batteries in the discharging process can be obtained. In the electricity utilization mode, namely in the state that the battery is in the discharging process, every time the battery is discharged, a corresponding relation curve of voltage and electric quantity in the electricity utilization mode, namely the electricity utilization mode with the electric power of 5W can be obtained. After repeating the first preset times, namely at least 21 times, acquiring a plurality of corresponding relation curves of the voltage and the electric quantity in the electricity utilization mode, namely the electricity utilization mode with the electric power of 5W. The step S1055 of obtaining the plurality of corresponding relationship curves between the voltage and the electric quantity in the power consumption mode is substantially a corresponding relationship curve between the voltage and the electric quantity in the discharging process of the battery.
And S106, acquiring a corresponding relation curve of the voltage and the electric quantity in the power consumption mode according to the corresponding relation curves of the voltage and the electric quantity.
Fig. 5 is a flowchart of a method for measuring battery capacity according to still another embodiment of the present invention. Alternatively, as shown in fig. 5, step S106 includes: namely, obtaining the corresponding relation curve of the voltage and the electric quantity in the power consumption mode according to the corresponding relation curves of the voltage and the electric quantity comprises the following steps:
and S1061, performing average fitting on the corresponding relation curves of the plurality of voltages and the electric quantity to obtain the corresponding relation curve of the voltages and the electric quantity in the power consumption mode.
That is, after the plurality of times of cyclic charge and discharge, the plurality of corresponding relationship curves of the voltage and the electric quantity are obtained, the plurality of electric quantities corresponding to each voltage are averaged with the voltage as an abscissa and the electric quantity as an ordinate, and finally the corresponding curve of the voltage and the electric quantity in the power consumption mode, that is, the power consumption mode with the constant power of 5W is obtained.
It can be understood that, because the first charging and discharging state of the battery is unstable, the voltage and electric quantity data obtained by the first charging and discharging are rejected in the data fitting process.
And S107, repeating the steps to obtain corresponding relation curves of the voltage and the electric quantity in different power consumption modes.
Repeating the steps S105 to S106, obtaining different power consumption modes, that is, constant powers of, for example, 10W and 20W, and finally obtaining a corresponding curve of voltage and electric quantity in the power consumption mode, that is, the power consumption mode with the constant power of 10W, according to the different constant powers; and acquiring a corresponding curve of the voltage and the electric quantity in the power consumption mode, namely the power consumption mode with the constant power of 20W.
It should be noted that the setting of the constant power may be determined according to the power of the electrical appliance at different gears, and then the cycling battery cell tester corrects the parameters according to the constant power corresponding to different power usage modes.
Fig. 6 is a flowchart of a method for measuring battery capacity according to still another embodiment of the present invention. Optionally, as shown in fig. 6, after step S104, the method further includes: namely, after acquiring the residual capacity, the method further comprises the following steps:
s108, acquiring the current charging and discharging times of the battery;
s109, calling a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery;
and S110, correcting the percentage of the residual electric quantity in the electricity utilization mode according to the current charge and discharge times of the battery and the corresponding relation curve of the rated electric quantity and the charge and discharge times of the battery.
It can be understood that the service life of the battery may be attenuated with the increase of the number of charging and discharging times, which may cause the corresponding curve of voltage and electric quantity in the electricity usage mode established in the above example to be distorted due to the attenuation of the service life of the battery, and therefore, it is necessary to obtain the service life curve of the battery, that is, the corresponding curve of the rated electric quantity and the number of charging and discharging times of the battery. The number of charge and discharge of the battery is understood to be one charge and one discharge.
Fig. 7 is a flowchart of a method for measuring battery capacity according to still another embodiment of the present invention. Optionally, as shown in fig. 7, before step S109, the method further includes, before obtaining a corresponding curve between a rated charge and a number of charging and discharging times of the battery:
s111, circularly charging and discharging the battery, wherein the number of circulation is a second preset number;
optionally, the second preset number is greater than or equal to 20.
And S112, establishing a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery.
And (3) repeatedly charging and discharging the battery through the cell cycle tester, wherein the charging and discharging times are not less than 20, and a life attenuation curve of the battery is obtained in an experiment.
In actual use, the control chip is used for recording the charging times, then the life curve of the battery is compared, when a decay value is reached, for example, 600 times of charging and discharging, the battery capacity (rated electric quantity) is decayed to 90%, and the battery capacity is multiplied by a decay coefficient, so that the distortion of a voltage query method caused by the decay of the battery life can be calibrated, namely (rated electric quantity 0.9-used electric quantity)/rated electric quantity 0.9.
It can be understood that, after the corresponding relationship curve of the voltage and the electric quantity corresponding to the power consumption mode is called according to the power consumption mode and the remaining electric quantity is obtained, the current charging and discharging times of the battery is obtained, the corresponding relationship curve of the rated electric quantity and the charging and discharging times of the battery is called, and finally, the percentage of the remaining electric quantity in the power consumption mode is corrected according to the current charging and discharging times of the battery and the corresponding relationship curve of the rated electric quantity and the charging and discharging times of the battery.
For example, when the battery is charged and discharged 600 times, the rated electric quantity of the battery is lost by 10%, the rated electric quantity is changed to 90%, at this time, the voltage corresponding to the battery in the power consumption mode is obtained, the used electric quantity corresponding to the voltage is obtained according to the corresponding relation between the voltage and the electric quantity in the power consumption mode, and the corrected remaining electric quantity percentage is obtained according to the used electric quantity and the attenuation coefficient of the rated electric quantity.
Fig. 8 is a block diagram of a device for measuring battery level according to an embodiment of the present invention. As shown in fig. 8, the apparatus for measuring the battery capacity includes:
the power utilization mode acquisition module 101 is used for acquiring the power utilization mode of the electrical appliance;
it should be noted that the electrical appliances in the power consumption mode acquisition module may be electrical appliances that carry a mobile power supply and have different power consumption gears, such as a dust collector, a humidifier, a floor sweeping robot, and the like. The power mode is understood to mean different power consumption steps. Different consumers of the electrical consumer or different powers of use can also be understood.
The calling module 102 is configured to call a corresponding relation curve between voltage and electric quantity corresponding to the power consumption mode according to the power consumption mode;
in the following, the electric appliance is taken as an example of a vacuum cleaner, wherein the vacuum cleaner has three power utilization modes of high-grade, medium-grade and low-grade. It can be understood that each power consumption mode corresponds to a corresponding relation curve of voltage and electric quantity. For example, after the power consumption mode of the dust collector is a high-grade power consumption mode, a corresponding relation curve of voltage and electric quantity corresponding to the high-grade power consumption mode is called according to the high-grade power consumption mode; when the power utilization mode of the dust collector is the middle-grade power utilization mode, calling a corresponding relation curve of voltage and electric quantity corresponding to the middle-grade power utilization mode according to the middle-grade power utilization mode; and when the power utilization mode of the dust collector is the low-gear power utilization mode, calling a corresponding relation curve of the voltage and the electric quantity corresponding to the low-gear power utilization mode according to the low-gear power utilization mode.
The voltage acquisition module 103 is used for acquiring a voltage corresponding to the battery in the power consumption mode;
the electric quantity obtaining module 104 is configured to obtain the remaining electric quantity according to the voltage corresponding to the battery and the corresponding relationship curve between the voltage and the electric quantity.
Still taking the vacuum cleaner as an example, when the power consumption mode of the vacuum cleaner is the high-grade power consumption mode, the corresponding relation curve of the voltage and the electric quantity corresponding to the high-grade power consumption mode is called, at this time, the voltage of the current battery is detected, and the current remaining electric quantity of the battery is obtained according to the corresponding relation curve of the voltage and the electric quantity in the high-grade power consumption mode.
The electric quantity in the corresponding relation curve of the voltage and the electric quantity is the used electric quantity, when the battery is actually used, the remaining electric quantity is obtained according to the used electric quantity, and for convenience of a user, the remaining electric quantity is often converted into a remaining electric quantity percentage, namely (rated electric quantity-used electric quantity)/rated electric quantity, and the rated electric quantity is the rated capacity of the battery.
Fig. 9 is a block diagram of a device for measuring battery level according to an embodiment of the present invention.
Optionally, as shown in fig. 9, the device for measuring battery capacity further includes:
a charge and discharge frequency obtaining module 108, configured to obtain a current charge and discharge frequency of the battery;
the second calling module 109 is used for calling a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery;
the calibration module 110 is configured to calibrate the percentage of the remaining power in the power consumption mode according to a corresponding relationship curve between the rated power of the battery and the charging/discharging frequency.
It can be understood that the service life of the battery may be attenuated with the increase of the number of charging and discharging times, which may cause the corresponding curve of voltage and electric quantity in the electricity usage mode established in the above example to be distorted due to the attenuation of the service life of the battery, and therefore, it is necessary to obtain the service life curve of the battery, that is, the corresponding curve of the rated electric quantity and the number of charging and discharging times of the battery. The number of charge and discharge of the battery is understood to be one charge and one discharge.
In actual use, the control chip is used for recording the charging times, then the life curve of the battery is compared, when a decay value is reached, for example, 600 times of charging and discharging, the battery capacity (rated electric quantity) is decayed to 90%, and the battery capacity is multiplied by a decay coefficient, so that the distortion of a voltage query method caused by the decay of the battery life can be calibrated, namely (rated electric quantity 0.9-used electric quantity)/rated electric quantity 0.9.
It can be understood that, after the corresponding relationship curve of the voltage and the electric quantity corresponding to the power consumption mode is called according to the power consumption mode and the percentage of the remaining electric quantity is obtained, the current charging and discharging times of the battery is obtained, the corresponding relationship curve of the rated electric quantity and the charging and discharging times of the battery is obtained, and finally the percentage of the remaining electric quantity in the power consumption mode is corrected according to the current charging and discharging times of the battery and the corresponding relationship curve of the rated electric quantity and the charging and discharging times of the battery.
For example, when the battery is charged and discharged 600 times, the rated electric quantity of the battery is lost by 10%, the rated electric quantity is changed to 90%, at this time, the voltage corresponding to the battery in the power consumption mode is obtained, the used electric quantity corresponding to the voltage is obtained according to the corresponding relation between the voltage and the electric quantity in the power consumption mode, and the corrected remaining electric quantity percentage is obtained according to the used electric quantity and the attenuation coefficient of the rated electric quantity.
The invention also provides electric equipment comprising the device for measuring the electric quantity of the battery.
The electric equipment can be an electric appliance which is provided with a vacuum cleaner, a humidifier, a sweeping robot and the like, carries a mobile power supply and has different power consumption gears.
It should be noted that, the corresponding relationship curve of the voltage and the electric quantity corresponding to the electricity consumption mode; a corresponding relation curve of the rated electric quantity of the battery and the charging and discharging times; are established in the laboratory in advance. The specific set-up means is described in detail below.
Fig. 10 is a block diagram of a battery charge measuring device according to another embodiment of the present invention. Optionally, as shown in fig. 10, the device for measuring battery capacity further includes:
the first establishing module 100 is configured to establish a corresponding relationship curve between voltage and electric quantity in different power consumption modes.
Fig. 11 is a block diagram of a battery charge measuring device according to another embodiment of the present invention. Optionally, as shown in fig. 11, the first establishing module 100 includes:
the first obtaining module 105 is configured to perform cyclic charging and discharging on the battery in the same power consumption mode, where the cycle number is a first preset number, and obtain a plurality of corresponding relationship curves between voltage and electric quantity in the power consumption mode;
wherein, in order to satisfy the usability of collecting the sample, the first preset number is at least 21.
In the same power consumption mode, that is, in the same power consumption, the power consumption will be described as 5W.
Fig. 12 is a block diagram of a battery charge measuring device according to still another embodiment of the present invention. Optionally, as shown in fig. 12, the first obtaining module 105 includes:
the charging module 1051 is used for charging the battery under the conditions of constant current and constant voltage, recording the voltage and the electric quantity of the battery in real time, and stopping charging when the voltage of the battery reaches a first preset voltage;
the first preset voltage may be 4.2V, that is, the battery voltage reaches a preset full charge voltage of 4.2V, and the off-current of the charge may be 50 mA. The voltage and the electric quantity of the battery are recorded in real time, a circulating battery core tester can be used for recording, and the electric quantity in the step S1051 is the actual electric quantity of the battery, namely the electric quantity of the battery which is charged.
The first standing module 1052 is used for standing the battery for a first preset time;
the first preset time may be 10 minutes, so that the fully charged state of the battery tends to be stable.
The discharging module 1053 is used for discharging the battery under constant power, recording the voltage and the electric quantity of the battery in real time, and stopping discharging when the voltage of the battery reaches a second preset voltage;
the second preset voltage may be 2.8V, that is, the battery stops discharging when the battery voltage reaches the preset discharge cut-off voltage of 2.8V. The voltage and the electric quantity of the battery can be recorded in real time by using a circulating electric core tester, wherein the constant power can be 5W, the constant power can also be set by using the circulating electric core tester, and the electric quantity in the step S1053 is the used electric quantity.
A second standing module 1054, configured to stand the battery for a second preset time;
the second preset time may be 10 minutes, which is a time when the battery is discharged and the state of the battery is stable.
The fourth obtaining module 1055 is configured to call the charging module 1051, the first standing module 1052, the discharging module 1053, and the second standing module 1054 repeatedly for a first preset number of times, and obtain a plurality of corresponding relationship curves between voltages and electric quantity in the power consumption mode.
It should be noted that, after the charging module 1051, the first standing module 1052, the discharging module 1053, and the second standing module 1054 are repeatedly called for at least 21 times, the battery is charged for at least 21 times, and the battery is discharged for at least 21 times, so that a corresponding relationship curve between the voltage and the electric quantity of at least 21 batteries in the charging process and a corresponding relationship curve between the voltage and the electric quantity of at least 21 batteries in the discharging process can be obtained. In the electricity utilization mode, namely in the state that the battery is in the discharging process, every time the battery is discharged, a corresponding relation curve of voltage and electric quantity in the electricity utilization mode, namely the electricity utilization mode with the electric power of 5W can be obtained. After repeating the first preset times, namely at least 21 times, acquiring a plurality of corresponding relation curves of the voltage and the electric quantity in the electricity utilization mode, namely the electricity utilization mode with the electric power of 5W. The step S1055 of obtaining the plurality of corresponding relationship curves between the voltage and the electric quantity in the power consumption mode is substantially a corresponding relationship curve between the voltage and the electric quantity in the discharging process of the battery.
A second obtaining module 106, configured to obtain a corresponding relationship curve between voltage and electric quantity in the power consumption mode according to the multiple corresponding relationship curves between voltage and electric quantity;
fig. 13 is a block diagram of a battery charge measuring device according to still another embodiment of the present invention. Optionally, as shown in fig. 13, the second obtaining module 106 includes:
the fitting module 1061 is configured to perform average fitting on the multiple corresponding relationship curves of the voltage and the electric quantity, so as to obtain the corresponding relationship curve of the voltage and the electric quantity in the power consumption mode.
That is, after the plurality of times of cyclic charge and discharge, the plurality of corresponding relationship curves of the voltage and the electric quantity are obtained, the plurality of electric quantities corresponding to each voltage are averaged with the voltage as an abscissa and the electric quantity as an ordinate, and finally the corresponding curve of the voltage and the electric quantity in the power consumption mode, that is, the power consumption mode with the constant power of 5W is obtained.
It can be understood that, because the first charging and discharging state of the battery is unstable, the voltage and electric quantity data obtained by the first charging and discharging are rejected in the data fitting process.
The third obtaining module 107 repeatedly calls the first obtaining module 105 and the second obtaining module 106, and is configured to obtain a corresponding relationship curve between voltage and electric quantity in different power consumption modes.
The first obtaining module 105 and the second obtaining module 106 are repeatedly called to obtain different power utilization modes, namely constant power is 10W, 20W and the like, and finally a corresponding curve of voltage and electric quantity under the power utilization mode, namely the power utilization mode with the constant power of 10W is obtained according to the different constant power; and acquiring a corresponding curve of the voltage and the electric quantity in the power consumption mode, namely the power consumption mode with the constant power of 20W.
It should be noted that the setting of the constant power may be determined according to the power of the electrical appliance at different gears, and then the cycling battery cell tester corrects the parameters according to the constant power corresponding to different power usage modes.
Fig. 14 is a block diagram of a battery charge measuring device according to still another embodiment of the present invention. Optionally, as shown in fig. 14, the device for measuring battery capacity further includes:
the cyclic charge and discharge module 111 is used for cyclically charging and discharging the battery, and the cycle number is a second preset number;
the second establishing module 112 is configured to establish a corresponding relationship curve between the rated electric quantity of the battery and the charging and discharging times.
And (3) repeatedly charging and discharging the battery through the cell cycle tester, wherein the charging and discharging times are not less than 20, and a life attenuation curve of the battery is obtained in an experiment.
In summary, according to the method, the device and the electric equipment for measuring the battery power provided by the embodiment of the invention, the power consumption mode of the electric equipment is obtained; calling a corresponding relation curve of the voltage and the electric quantity corresponding to the power utilization mode according to the power utilization mode; acquiring the voltage corresponding to the battery in the power utilization mode; and then, the residual electric quantity is obtained according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity, so that the accurate measurement of the electric quantity of the battery in different power utilization modes is realized, and the cost is reduced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for measuring the electric quantity of a battery is characterized by comprising the following steps:
acquiring the power utilization mode of an electric appliance;
calling a corresponding relation curve of voltage and electric quantity corresponding to the power utilization mode according to the power utilization mode;
acquiring voltage corresponding to the battery in the power utilization mode;
and acquiring the residual electric quantity according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity.
2. The method for measuring battery power according to claim 1, further comprising, before obtaining the power mode of the electrical consumer:
and establishing a corresponding relation curve of the voltage and the electric quantity in different power utilization modes.
3. The method for measuring battery power according to claim 2, wherein the establishing of the corresponding relationship curve between the voltage and the power in different power consumption modes comprises:
in the same power utilization mode, carrying out cyclic charge and discharge on the battery, wherein the cycle number is a first preset number, and acquiring a plurality of corresponding relation curves of voltage and electric quantity in the power utilization mode;
acquiring a corresponding relation curve of the voltage and the electric quantity in the power consumption mode according to the corresponding relation curves of the voltage and the electric quantity;
and repeating the steps to obtain the corresponding relation curve of the voltage and the electric quantity in different power consumption modes.
4. The method for measuring the electric quantity of the battery according to claim 3, wherein the battery is charged and discharged in a cyclic manner in the same power consumption mode, the number of cycles is a first preset number, and the obtaining of the plurality of corresponding relationship curves of the voltage and the electric quantity in the power consumption mode comprises:
charging the battery under the condition of constant current and constant voltage, recording the voltage and the electric quantity of the battery in real time, and stopping charging when the voltage of the battery reaches a first preset voltage;
standing the battery for a first preset time;
discharging the battery under constant power, recording the voltage and the electric quantity of the battery in real time, and stopping discharging when the voltage of the battery reaches a second preset voltage;
standing the battery for a second preset time;
and repeating the steps for the first preset times to obtain a plurality of corresponding relation curves of the voltage and the electric quantity in the power consumption mode.
5. The method for measuring battery power according to claim 3, wherein the obtaining the corresponding relationship curve of the voltage and the power in the power consumption mode according to the corresponding relationship curves of the voltage and the power comprises:
and performing average fitting on the corresponding relation curves of the plurality of voltages and the electric quantity to obtain the corresponding relation curve of the voltages and the electric quantity in the power consumption mode.
6. The method for measuring the amount of power of a battery according to claim 1, further comprising, after acquiring the remaining amount of power:
acquiring the current charging and discharging times of the battery;
calling a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery;
and correcting the percentage of the residual electric quantity according to the current charging and discharging times of the battery and a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery.
7. The method for measuring the electric quantity of the battery according to claim 6, wherein before the obtaining the corresponding relation curve between the rated electric quantity and the charging and discharging times of the battery, the method further comprises:
the battery is charged and discharged circularly, and the circulating frequency is a second preset frequency;
and establishing a corresponding relation curve of the rated electric quantity and the charging and discharging times of the battery.
8. The method of claim 7, wherein the second predetermined number of times is greater than or equal to 20 times.
9. A device for measuring the charge of a battery, comprising:
the power consumption mode acquisition module is used for acquiring the power consumption mode of the electrical appliance;
the calling module is used for calling a corresponding relation curve of voltage and electric quantity corresponding to the power utilization mode according to the power utilization mode;
the voltage acquisition module is used for acquiring the voltage corresponding to the battery in the power utilization mode;
and the electric quantity acquisition module is used for acquiring the residual electric quantity according to the voltage corresponding to the battery and the corresponding relation curve of the voltage and the electric quantity.
10. An electric device comprising the battery level measuring apparatus according to claim 9.
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