WO2014161325A1 - Procédé, dispositif, et terminal de détection de quantité électrique de batterie - Google Patents

Procédé, dispositif, et terminal de détection de quantité électrique de batterie Download PDF

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Publication number
WO2014161325A1
WO2014161325A1 PCT/CN2013/087794 CN2013087794W WO2014161325A1 WO 2014161325 A1 WO2014161325 A1 WO 2014161325A1 CN 2013087794 W CN2013087794 W CN 2013087794W WO 2014161325 A1 WO2014161325 A1 WO 2014161325A1
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WIPO (PCT)
Prior art keywords
current
battery
voltage
value
charging
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PCT/CN2013/087794
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English (en)
Chinese (zh)
Inventor
李阳
伏红峰
朱小三
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中兴通讯股份有限公司
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Publication of WO2014161325A1 publication Critical patent/WO2014161325A1/fr

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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

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device and terminal for detecting battery power. Background technique
  • the power detection methods on the terminal products are generally classified into three types, a battery voltage monitoring method, a battery modeling method, and a coulomb meter.
  • Battery voltage monitoring method This method estimates the battery by monitoring the voltage of the battery, so its accuracy is low, but it is relatively easy to implement, so it is widely used in terminal equipment.
  • the voltage and power of the battery are not simply linear. As shown in Figure 1, it is this nonlinear relationship that directly leads to high error in the voltage monitoring, and the final estimated value. The error is over 20%. Therefore, the exact battery value cannot be displayed as a percentage and can only be displayed in segments. Mobile phone users often find that only one cell is displayed when the phone is connected to the phone, and after the phone is finished, the battery's power has jumped to two cells, that is, the battery jump caused by the voltage jump.
  • This method is based on the discharge curve of a lithium battery, and establishes a discharge model. Each time a voltage value is measured, the corresponding battery power is detected in the model according to the voltage. This method can effectively improve the estimation accuracy of the power, the error range is up to 5%, do not need to make the initial estimate of the battery power, and is simple and easy to use, but the establishment of the data table is more complicated, especially Considering the effects of power ripple, ground bounce, analog on-resistance, temperature drift, etc., and not compatible with different types of batteries.
  • a current sense resistor is connected in series with the positive or negative pole of the battery. When the current passes through the monitor resistor, a voltage difference is generated across the resistor, and the current flowing through the battery is calculated by detecting the voltage difference.
  • the current-to-time integral is the varying charge value, which allows accurate calculation of battery charge changes with an accuracy of 1%.
  • there is a cumulative error in the method of using the integral and the longer the time, the larger the cumulative error.
  • the coulomb counter has cumulative error and initial battery estimation, and the accuracy of the current sense resistor directly affects the accuracy of the battery, but with the monitoring of battery voltage and temperature, some software algorithms can better reduce the initial charge of the lithium battery. Estimation, cumulative error, battery aging, current sense resistor accuracy and other factors affect the measurement results. So this method is the mainstream usage of today's fuel gauge chips.
  • Embodiments of the present invention provide a method, a device, and a terminal for detecting a battery power, which are used to solve the prior art.
  • the power detecting method can accurately detect the power value
  • the power meter chip and the power meter chip need to be used. It will increase the cost of the terminal and will also reduce the problem of the battery life of the terminal.
  • an embodiment of the present invention provides a method for detecting a battery power, including: determining a current operating current according to a voltage difference, wherein the voltage difference is a voltage value across the load resistor; The working current is interpolated and transformed to the voltage electric quantity correspondence table to obtain a current electric quantity value, wherein the electric quantity electric quantity correspondence table records a corresponding value of the voltage and the electric quantity in the charging or discharging state.
  • the method before determining the current working current, further includes: saving the voltage difference to An array of instantaneous voltage difference values, and determining an average of the plurality of voltage difference values or the voltage difference values recorded in the array of the instantaneous voltage difference values; according to the voltage difference value or the voltage difference value The average value determines the current charge and discharge status of the battery.
  • determining the current charging and discharging state of the battery according to the average value of the voltage difference includes: saving an average value of the voltage difference of a preset number of times; When the average value is greater than zero, it is determined that the battery is currently in a discharged state; in a case where the average value of the voltage difference of the preset number of times is less than zero, it is determined that the battery is currently in a charging state.
  • obtaining the current battery power value comprises: performing an interpolation transformation on the voltage power amount correspondence table based on the charging current by a Lagrangian interpolation method to obtain a current battery power value, wherein the charging current is a constant battery The current in the current charging phase; or, according to the charging current, the time is integrated to obtain the current battery power value, wherein the charging current is the current of the battery in the constant voltage charging phase; or, based on the Lagrangian interpolation method, based on the discharging The current is subjected to quadratic interpolation conversion on the voltage electric quantity correspondence table to obtain the current battery electric quantity value.
  • the second interpolation calculation is performed on the voltage electric quantity correspondence table based on the discharge current by the Lagrangian interpolation method, so as to obtain the current electric quantity value of the battery, including: performing, by the discharge current, the voltage electric quantity correspondence table under different loads.
  • the interpolation is performed to obtain a voltage electric quantity correspondence table under the current load; the voltage electric quantity correspondence table under the current load is subjected to interpolation and interpolation by the voltage average value of the battery to obtain the current battery electric quantity value.
  • the method further includes: determining a minimum time interval when the power quantity changes by 1% according to the statistical maximum working current; and performing the minimum time interval when determining that the battery power value changes. After that, the determined power value is displayed.
  • the method further includes: when detecting that switching between the state of charge and the state of discharge has occurred, buffering the value stored in the array of instantaneous voltage difference values according to a predetermined number of times, wherein The predetermined number of times is the number of arrays stored in the array of the instantaneous voltage difference values.
  • the embodiment of the present invention further provides an apparatus for detecting a battery power, including: a first determining module configured to determine a current operating current according to a voltage difference, wherein the voltage difference is a voltage across the load resistor
  • the interpolation conversion module is configured to perform interpolation and transformation on the voltage and power correspondence table according to the working current to obtain a current battery power value, wherein the voltage power correspondence table records a corresponding value of the voltage and the power in the charging or discharging state.
  • the apparatus further includes: a second determining module configured to save the voltage difference value to an array of instantaneous voltage difference values, and determine the plurality of the voltages recorded in the array of the instantaneous voltage difference values And a third value determining module configured to determine a current charging and discharging state of the battery according to the voltage difference value or an average value of the voltage difference values.
  • a second determining module configured to save the voltage difference value to an array of instantaneous voltage difference values, and determine the plurality of the voltages recorded in the array of the instantaneous voltage difference values
  • a third value determining module configured to determine a current charging and discharging state of the battery according to the voltage difference value or an average value of the voltage difference values.
  • the device further includes: a fourth determining module configured to determine a minimum time interval when the power quantity changes by 1% according to the statistical maximum operating current; and a display module configured to determine that the battery power value changes After the minimum time interval is elapsed, the determined power value is displayed.
  • a fourth determining module configured to determine a minimum time interval when the power quantity changes by 1% according to the statistical maximum operating current
  • a display module configured to determine that the battery power value changes After the minimum time interval is elapsed, the determined power value is displayed.
  • the interpolation transformation module includes: a first interpolation transformation unit configured to perform an interpolation transformation on the voltage and electricity correspondence table based on the charging current by a Lagrangian interpolation method to obtain a current battery power value, wherein The charging current is a current of the battery in a constant current charging phase; the second interpolation converting unit is configured to perform a secondary interpolation conversion on the voltage electric quantity correspondence table based on the discharging current by a Lagrangian interpolation method to obtain a current battery electric quantity value;
  • the integration unit is configured to integrate the time according to the charging current to obtain the current battery value, wherein the charging current is the current of the battery in the constant voltage charging phase.
  • the embodiment of the present invention further provides a terminal, including: A device that detects battery power.
  • the electric quantity value of the battery is obtained by interpolating and transforming the voltage electric quantity correspondence table by using the interpolation method. If the electricity meter chip is not used, the accurate electric quantity value can be obtained, the terminal cost is reduced, and the power consumption duration of the terminal is increased.
  • the utility model solves the problem of using the fuel gauge chip when measuring the electric quantity value in the prior art, and the use of the fuel gauge chip increases the cost of the terminal, and also reduces the use time of the terminal battery.
  • FIG. 1 is a schematic view showing discharge characteristics of a lithium battery in the prior art
  • FIG. 2 is a flow chart of a method for detecting battery power in an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a basic circuit of a method for detecting a battery power in an embodiment of the present invention
  • FIG. 4 is a schematic structural view of an apparatus for detecting a battery power according to an embodiment of the present invention
  • FIG. 5 is another detection battery in an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another apparatus for detecting a battery power according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of an interpolation conversion module of a device for detecting a battery power according to an embodiment of the present invention
  • FIG. 8 is a flow chart of a method for detecting battery power in a preferred embodiment of the present invention
  • FIG. 9 is a circuit diagram of a device for detecting battery power using a fuel gauge principle in a preferred embodiment 2 of the present invention
  • FIG. 10 is a flow chart for calculating a current operating current in a preferred embodiment 2 of the present invention.
  • FIG. 11 is a diagram showing an example of secondary interpolation in a preferred embodiment 2 of the present invention.
  • the embodiment of the invention provides a method for detecting the battery power.
  • the flow of the method is as shown in FIG. 2, and includes steps S202 to S204.
  • Step S202 determining a current operating current according to the voltage difference, wherein the voltage difference is a voltage value across the load resistor.
  • FIG. 3 The basic circuit of the above method is shown in FIG. 3, which utilizes a circuit for connecting a load resistor between the battery and the system circuit, detects the battery voltage and the system voltage through the above circuit, and further obtains the voltage difference, and then obtains the current according to the connected load.
  • the operating current wherein the operating current can include a charging current and a discharging current.
  • Step S204 performing interpolation calculation on the voltage electric quantity correspondence table according to the working current to obtain the current battery electric quantity value, wherein the voltage electric quantity correspondence table records the corresponding value of the voltage and the electric quantity in the charging or discharging state.
  • the Lagrangian interpolation formula can be used as a basis, and then the voltage electric quantity correspondence table is interpolated and converted according to the current working current to obtain the electric quantity value of the battery.
  • the power value of the battery is obtained by interpolation and transformation of the voltage and electricity correspondence table by using the Lagrangian interpolation method. If the power meter chip is not used, an accurate power value can be obtained, the terminal cost can be reduced, and the terminal is used.
  • the electrical duration solves the problem of using the fuel gauge chip when measuring the power value in the prior art, which reduces the power consumption of the terminal.
  • those skilled in the art can select other formulas as the basis for performing interpolation transformation according to actual needs.
  • the voltage difference value may be first saved into an array of instantaneous voltage difference values, and an average value is calculated according to the multiple voltage difference values recorded in the array of instantaneous voltage difference values;
  • the current state of charge and discharge of the battery wherein if the average value is greater than zero, it is determined that the battery is in a discharged state, and if the average value is less than zero, it is determined that the battery is in a charged state.
  • an average value of the voltage difference of the preset number of times may be saved, wherein the preset number of times may be an empirical value, which can be set by a person skilled in the art according to requirements, for example, 15 Times. If the average value of the voltage difference of 15 times is greater than zero, it can be determined that the battery is currently in a discharged state; if the average value of the voltage difference of 15 times is less than zero, it can be determined that the battery is currently in a charging state. If the average value appears to be more than or less than zero in the course of 15 more times, the process of judging the state of the battery is abandoned, and the judgment is made after the next 15 times.
  • the voltage-electricity correspondence table is subjected to interpolation calculation based on the charging current by the Lagrangian interpolation method to obtain the current battery power value. If the current battery is in the constant voltage charging phase, the current on the load resistor can be integrated over time to get the current charge value. If the current battery is in a discharged state, the voltage-electricity correspondence table is subjected to secondary interpolation by the Lagrangian interpolation method to obtain the current battery power value.
  • the voltage current amount correspondence table under different loads may be interpolated by the discharge current to obtain a voltage electric quantity correspondence table under the current load;
  • the voltage average value is subjected to an interpolation conversion on the voltage electric quantity correspondence table under the current load to obtain the current battery electric quantity value.
  • the embodiment provides a process for further buffering the power value, including: determining a minimum time interval when the power is changed by 1% according to the statistical maximum operating current, where the working current may be The charging current may also be a discharging current; in the case of determining that the battery's electric quantity value has changed, the determined electric quantity value is displayed after the minimum time interval has elapsed.
  • T ( C / I max ) * (60/100), where T is the change in charge
  • C is the total battery capacity
  • I max is the maximum operating current.
  • the statistical work of the maximum operating current may be continuous acquisition statistics, and after each acquisition, the largest of the two latest operating currents is recorded. For example, the first two operating currents are collected, the largest of the two operating currents is recorded, and the maximum current is compared to an operating current that is subsequently acquired for the second time. If the second collected current is greater than the previously determined maximum current, the second collected operating current is determined as the current maximum current; if the second collected operating current is less than the previously determined maximum Current, the maximum current does not change.
  • the instantaneous voltage is applied a predetermined number of times.
  • the value stored in the difference array is buffer-replaced, wherein the predetermined number of times is the number of arrays stored in the array of instantaneous voltage difference values.
  • the embodiment also provides a device for detecting the battery power.
  • the structure of the device is shown in FIG. 4, and includes:
  • the first determining module 10 is configured to determine a current working current according to the voltage difference, wherein the voltage difference is a voltage value across the load resistor;
  • the interpolation conversion module 20 is coupled to the first determining module 10, configured to perform interpolation calculation on the voltage electric quantity correspondence table according to the operating current, and obtain the current battery electric quantity value, wherein the voltage electric quantity correspondence table is used to record the voltage in the charging or discharging state. Corresponding value to the amount of electricity.
  • FIG. 5 is a schematic structural diagram of another apparatus for detecting a battery power. Based on the apparatus of FIG. 4, the apparatus may further include:
  • the second determining module 30 is configured to save the voltage difference value to an array of instantaneous voltage difference values, and determine an average value of the multiple voltage difference values or voltage difference values recorded in the array of the instantaneous voltage difference values; the third determining module 40
  • the third determining module 40 may further include: configured to save a preset number of voltage differences. A unit that determines that the battery is currently in a discharged state; configured to determine a unit in which the battery is currently in a charged state if the average of the voltage differences of the preset number of times is less than zero.
  • FIG. 6 is a schematic structural diagram of another apparatus for detecting a battery power. Based on the apparatus of FIG. 5, the apparatus may further include:
  • the fourth determining module 50 is coupled to the third determining module 40, and configured to determine a minimum time interval when the power changes by 1% according to the statistical maximum working current;
  • the display module 60 is coupled to the fourth determining module 50 and configured to display the determined power value after a minimum time interval in a case where it is determined that the battery power value has changed.
  • Figure 7 is a diagram showing a preferred configuration of the interpolation conversion module 20 in the above-described apparatus for detecting the amount of battery power, wherein the interpolation conversion module 20 includes:
  • the first interpolation transform unit 202 is configured to perform an interpolation transformation on the voltage electric quantity correspondence table based on the charging current by the Lagrangian interpolation method to obtain the current battery electric quantity value, wherein the charging current is the current of the battery in the constant current charging stage. ;
  • the second interpolation transformation unit 204 is configured to perform secondary interpolation transformation on the piezoelectric quantity correspondence table based on the discharge current by the Lagrangian interpolation method to obtain the current battery power value;
  • the integrating unit 206 is configured to integrate the time according to the charging current to obtain the current value of the battery, wherein the charging current is the current of the battery in the constant voltage charging phase.
  • the second interpolation transform unit 204 determines the power value according to the following method: Performing an interpolation transformation on the voltage and power correspondence table under different loads by the discharge current to obtain a voltage and electricity correspondence table under the current load; The voltage and power correspondence table under the current load is subjected to one interpolation conversion to obtain the current battery power value.
  • the apparatus may further include a module configured to buffer replace the value stored in the array of instantaneous voltage difference values by a predetermined number of times when detecting that switching between the state of charge and the state of discharge has occurred, wherein the predetermined number of times Storing an array into an array of instantaneous voltage differences Quantity.
  • the preferred embodiment provides a new method of detecting battery power on a terminal.
  • the method can make the terminal product not use the fuel gauge chip, thereby reducing the power consumption of the whole machine and reducing the cost brought by the power meter chip; for the developer, the complicated battery model can be shortened and shortened. In the R&D cycle, the battery jump caused by the simple voltage monitoring method can be avoided, and the battery percentage of the higher precision is obtained.
  • the method for detecting the battery power in this embodiment is to perform secondary interpolation on the battery voltage correspondence table under different loads according to the load of the terminal, and enter a series of optimization algorithms to charge and discharge the battery. An accurate estimate of the electricity value at the time.
  • Step S802 estimating initial battery power according to battery voltage and current system load during initialization
  • step S804 during the operation, the battery value of the battery is accurately estimated by the Lagrangian interpolation algorithm.
  • Step S802 includes: sampling an initial voltage (V-B ATT ) of the battery through an analog-to-digital converter (ADC), and initializing an array of instantaneous voltage values of the battery; initializing by the ADC sampling system Voltage (V_SYS), find the voltage difference (V BATT - V SYS ), and initialize an array that holds the instantaneous voltage difference. Calculate the initial battery charge value based on the battery voltage search voltage and voltage correspondence table.
  • ADC analog-to-digital converter
  • step S804 includes: (1) calculating the voltage; (2) calculating the amount of electricity when the battery is charged and discharged; and (3) calculating the power buffer.
  • the calculation of the voltage includes: sampling the battery instantaneous voltage (V BATT ) through the ADC, cyclically storing an array of instantaneous voltage values into the battery, and obtaining an average value;
  • the ADC samples the system instantaneous voltage (V_SYS), finds the voltage difference (V_BATT - V_SYS), and saves the array into the instantaneous voltage difference and averages it. Then, according to the average value of the voltage difference, the current state of charge and discharge of the battery is determined, wherein the average value of the voltage difference is saved ten times, and the judgment is made. If 10 times are greater than zero, the battery is currently discharged, if 10 times If it is less than zero, the battery is currently charged.
  • the calculation of the amount of electricity during charging and discharging of the battery includes: buffering processing when charging and discharging the battery; calculating the charging power of the battery; calculating the discharging power of the battery; buffering the electric quantity.
  • the buffering process for switching between charging and discharging of the battery includes: buffering the power calculation cycle 10 times when the battery is charged and discharged, wherein, during charging, the counting is full, and when discharging, counting is empty. Judge.
  • the calculation of the battery charging power includes: The battery is divided into a constant current charging phase and a constant voltage charging phase during the charging process. If the battery voltage reaches the charging limit voltage of the battery when the battery is in the charging state, the battery enters the constant voltage charging phase. If the battery voltage does not reach the battery's charge limit voltage, it is in the constant current charging phase. When the battery is in the constant current charging phase, it can be interpolated according to the current charging current to obtain the current battery value. When the battery is in the constant voltage charging phase, use the current value of the current current sensitive resistor (load resistor) to integrate with the time to accumulate the current battery value.
  • load resistor load resistor
  • the calculation of the discharge capacity of the battery includes: according to the current discharge current, performing secondary interpolation to obtain the current battery value, wherein the process of secondary interpolation using the operating current is as follows: According to the current discharge current, under different loads The voltage electric quantity correspondence table performs the first interpolation, obtains the voltage electric quantity correspondence table under the current load, and then uses the battery average value to perform the second interpolation on the voltage electric quantity correspondence table to obtain the current battery electric quantity value.
  • the power estimation of the battery under charge and discharge conditions is realized by software, and the fuel gauge chip must be used in the related art, thereby causing a large interrupt power consumption and a high cost. problem.
  • the preferred embodiment provides a mobile terminal, and the mobile terminal internally includes a device for detecting a battery power, wherein the device uses a circuit diagram of the fuel gauge in the terminal product, as shown in FIG.
  • the load resistor for detecting the current is connected to the input pin of the ADC at both ends of the resistor.
  • Figure 10 is a flow chart for calculating the current operating current. As shown in Fig. 10, it includes the following flow (step S1002 to step S1014).
  • step S1002 it is determined whether the battery is present. If yes, step S1004 is performed, otherwise step S1014 is performed. Among them, the process of judging whether the battery is present can be realized by reading the ID pin of the battery or judging the temperature of the battery.
  • step S1004 the battery voltage (V_B ATT ) and the system voltage (V_S YS ) are respectively sampled by the ADC.
  • step S1006 the battery voltage array is filled and averaged.
  • step S1008 the voltage difference value (V_BATT - V SYS ) is obtained, and the average value is processed.
  • step S1010 Determine a charge and discharge state of the battery according to the voltage difference.
  • the voltage value of each sampling may be put into an array of capacity 10, and after the maximum value and the minimum value are removed from the data in the array, the average value is calculated. Then, the battery is charged and discharged, for example, the average value of the voltage difference is saved ten times, and the judgment is made. If 10 times are greater than zero, the battery is currently in a discharged state, and if 10 times are less than zero, the electricity is generated. The pool is currently in a charging state.
  • step S1012 the current battery charge and discharge current is calculated using the average value of the voltage difference and the resistance of the current detecting resistor.
  • step S1014 the next scheduling is directly entered.
  • the buffering process of the charge state switching may be performed, that is, when the state of the battery charge and discharge is switched, the buffer of the power calculation cycle is performed 10 times. .
  • the power calculation cycle is incremented, and the count is fully judged.
  • the power calculation cycle is decremented, and the count is judged.
  • the power calculation is performed, which is divided into charge power calculation and discharge power calculation, and finally the power buffer processing, that is, according to the maximum charging current of the terminal and the maximum discharge current, the minimum time interval when the power changes by 1% is calculated.
  • step S1012 it is necessary to determine the current state of the battery.
  • the battery is in a non-passing state and the process of calculating the battery value is different.
  • the battery If the battery is in a charging state, it is judged whether the battery is in the constant current charging phase or the constant voltage charging phase.
  • the above different stages of division criteria are: When the battery voltage reaches the charging limit voltage of the battery, it enters the constant voltage charging phase, otherwise it is in the constant current charging phase. If it is in the constant current charging phase, perform an interpolation according to the current charging current to obtain the current battery value. If it is in the constant voltage charging phase, use the current charging current value to integrate the time and accumulate the current battery value. Finally, when the battery is in the charging phase, the power is monotonically increasing, that is, the ratio of the calculated power to the percentage of the battery to be updated causes the power value to be incremented.
  • the secondary interpolation is performed according to the current discharge current, and the current battery power value is obtained.
  • the power is monotonically decreasing, so the power value is monotonically decremented.
  • the voltage electric quantity correspondence table under different loads is firstly interpolated, and the voltage electric quantity correspondence table under the current load is obtained, and then the battery voltage average is used.
  • the value is subjected to the second interpolation of the voltage and power correspondence table to obtain the current battery value.
  • the current working current is 80mA, as shown in Figure 11, there is now a voltage of 50mA and 100mA load, the corresponding curve of the power, first calculate the slope between the current points is (100-80) / (80-50), according to This slope calculates the voltage value at different power points to obtain a new voltage corresponding curve, ie
  • the voltage corresponding to the voltage at 80 mA corresponds to the curve.
  • the voltage average of the current battery is used to find the voltage and electricity correspondence table under 80 mA, and the final power value is obtained after interpolation.
  • Table 1 shows the test results of the battery power when the load current is connected and the system current is changed to a sudden load of 50 mA to 1000 mA. It can be seen from the table that as the load changes, the battery voltage fluctuates, but the power is maintained at 88%, and the battery power is stably output, without a sudden change.
  • the terminal product provided by the preferred embodiment can be used without the use of the fuel gauge chip, thereby reducing the power consumption of the whole machine and reducing the cost of using the fuel gauge chip.
  • the developer can use the technical solution of the embodiment of the present invention. Establish complex battery models, shorten the development cycle, and avoid battery jumps caused by simple voltage monitoring methods, resulting in higher accuracy battery power Value.

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Abstract

L'invention concerne un procédé, un dispositif et un terminal de détection de quantité électrique d'une batterie. Le procédé comporte : en fonction d'une valeur de différence de tension, l'étape consistant à déterminer un courant de fonctionnement en cours, la valeur de différence de tension étant une valeur de tension des deux extrémités d'une résistance de charge (S202) ; et en fonction du courant de fonctionnement, l'étape consistant à effectuer une transformée d'interpolation sur une table de correspondance de tension et de quantité électrique, de manière à obtenir la quantité électrique en cours de la batterie (S204), dans lequel la table de correspondance de tension et de quantité électrique enregistre une valeur correspondante de tension et de quantité électrique dans un état de charge ou un état de décharge.
PCT/CN2013/087794 2013-08-13 2013-11-25 Procédé, dispositif, et terminal de détection de quantité électrique de batterie WO2014161325A1 (fr)

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