CN116413599A - Battery electric quantity testing method, device, equipment and medium - Google Patents
Battery electric quantity testing method, device, equipment and medium Download PDFInfo
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Abstract
The disclosure relates to a battery power testing method, device, equipment and medium. The battery electric quantity testing method comprises the following steps: acquiring a first battery voltage and a first battery capacity of a target reference battery; correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage; calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; a first association is determined based on the second battery voltage and the first battery level. According to the embodiment of the disclosure, the association relationship (namely the first association relationship) between the battery voltage and the battery electric quantity of the target reference battery can be determined, so that when the target battery voltage of the target battery is obtained, the target battery electric quantity corresponding to the target battery voltage can be inquired based on the first association relationship, and the estimation mode of the battery electric quantity is simple and efficient.
Description
Technical Field
The disclosure relates to the technical field of batteries, and in particular relates to a battery electric quantity testing method, device, equipment and medium.
Background
The battery is a device which can store electric energy and can charge electronic products such as mobile phones, tablets and the like. The battery power is an important parameter for reflecting the residual energy of the battery, so that the estimation method of the battery power has become a popular research problem.
Currently, there are various methods for estimating the battery power, such as an ampere-hour integration method, an open circuit voltage method, an internal resistance method, and the like. However, these methods also require a large number of test experiments on the battery, and require estimation of the battery power according to the characteristics of the battery cells, resulting in a complicated estimation method of the battery power. Therefore, a simple battery charge estimation method is needed.
Disclosure of Invention
In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a method, an apparatus, a device, and a medium for testing battery power.
In a first aspect, the present disclosure provides a battery charge testing method, the method comprising:
acquiring a first battery voltage and a first battery capacity of a target reference battery;
correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage;
calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the reference battery is full;
Determining a first association based on the second battery voltage and the first battery level;
the first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery.
Optionally, acquiring the first battery voltage and the first battery capacity of the target reference battery includes:
in a charging process of a charging and discharging test, constant-current charging is carried out on a target reference battery by a preset charging current, and a first battery voltage and a first battery capacity are obtained; and/or;
and in the discharging process of the charging and discharging test, performing constant-current discharging on the target reference battery by using a preset discharging current, and acquiring a first battery voltage and a first battery capacity.
Optionally, correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage, including:
when the first battery voltage is a voltage obtained in a charging process of a charge-discharge test, correcting the first battery voltage based on vtransfer=vcharge- (r1+r2) I; and/or;
correcting the first battery voltage based on vtransfer=vcharge+ (r1+r2) x I when the first battery voltage is a voltage obtained during a discharging process of the charge-discharge test;
Wherein, vtransfer is the second battery voltage, vcharge is the first battery voltage, R1 is the internal resistance of the target reference battery, and R2 is the internal resistance of the detection circuit where the target reference battery is located; i is the current corresponding to the first battery voltage.
Optionally, determining the first association based on the second battery voltage and the first battery level includes:
determining a first sub-association relationship corresponding to a charging process based on a second battery voltage obtained in the charging process of each charging and discharging test and the corresponding first battery electric quantity of each target reference battery; the first sub-association relationship is an association relationship between the second battery voltage and the first battery power;
and/or;
determining a first sub-association relationship corresponding to a discharging process based on a second battery voltage and a first battery electric quantity corresponding to the second battery voltage acquired in the discharging process of each charging and discharging test aiming at each target reference battery;
and determining a first association relationship based on each first sub-association relationship.
Optionally, determining the first association relationship based on each first sub-association relationship includes:
fitting the first sub-association relations to obtain first association relations.
Optionally, the preset number of times of charge and discharge testing is greater than 1 for the target reference battery; and/or; the number of target reference cells is greater than 1.
Optionally, the first correlation includes a battery voltage-battery charge curve;
wherein, after determining the first association relationship based on the second battery voltage and the first battery power, the method further comprises:
and selecting a plurality of battery voltages and corresponding battery electric quantity from the battery voltage-battery electric quantity curve to obtain a battery voltage and battery electric quantity comparison table.
In a second aspect, the present disclosure provides a battery power testing apparatus, the apparatus comprising:
an acquisition module for acquiring a first battery voltage and a first battery capacity of a target reference battery;
the correction module is used for correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage;
the calculation module is used for calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the reference battery is full;
the determining module is used for determining a first association relation based on the second battery voltage and the first battery electric quantity;
the first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery.
In a third aspect, the present disclosure provides a battery charge testing apparatus comprising:
a processor;
a memory for storing executable instructions;
the processor is configured to read the executable instructions from the memory, and execute the executable instructions to implement the battery power testing method according to the first aspect.
In a fourth aspect, the present disclosure provides a computer readable storage medium storing a computer program, which when executed by a processor causes the processor to implement the battery level testing method of the first aspect.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the embodiment of the disclosure provides a battery electric quantity testing method, device, equipment and medium, which can acquire a first battery voltage and a first battery capacity of a target reference battery; correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage; calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the reference battery is full; determining a first association based on the second battery voltage and the first battery level; the first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery. Therefore, according to the embodiment of the disclosure, the association relationship (i.e., the first association relationship) between the battery voltage and the battery power of the target reference battery can be determined, so that when the target battery voltage of the target battery is obtained, the target battery power corresponding to the target battery voltage can be queried based on the first association relationship, so that the estimation mode of the battery power is simple and efficient.
Drawings
The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.
Fig. 1 is a flow chart of a battery power testing method according to an embodiment of the disclosure;
fig. 2 is a schematic diagram of a first association relationship provided in an embodiment of the disclosure;
fig. 3 is a schematic structural diagram of a battery power testing device according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a battery power testing device according to an embodiment of the present disclosure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been shown in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
Fig. 1 is a flow chart of a battery power testing method according to an embodiment of the disclosure.
In some embodiments of the present disclosure, the battery level testing method shown in fig. 1 may be performed by a battery level testing device. The battery level testing device may be, for example, a power management system (Battery Management System, BMS), but is not limited thereto. The battery electric quantity testing method can determine the association relationship between the battery voltage and the battery electric quantity of the target reference battery, namely the first association relationship, so that the target battery electric quantity corresponding to the target battery voltage can be inquired based on the first association relationship. As shown in fig. 1, the battery power testing method may specifically include the following steps.
S110, acquiring a first battery voltage and a first battery capacity of a target reference battery.
In the embodiment of the disclosure, the battery power testing device may perform a preset number of charge and discharge tests on the target reference battery to obtain the first battery voltage and the first battery capacity of the target battery.
Specifically, the target reference battery may be any battery having the same structure or model as the target battery.
By way of example, by type, the target reference battery may include a lithium ion battery, a lithium metal battery, a lead-acid battery, a nickel cadmium battery, a nickel hydrogen battery, a lithium sulfur battery, a lithium air battery, or a sodium ion battery, etc., without limitation herein. In terms of application scenarios, the target reference battery may be applied to a mobile power supply or the like, and is not limited herein.
Specifically, the target reference battery is charged and discharged once, namely, one charge and discharge test is completed.
Specifically, S110 may be implemented in various ways, and a typical example will be described below, but it is not limited to the embodiments of the present disclosure.
In some embodiments, S110 may specifically include: periodically acquiring a first battery voltage and a first battery capacity of a target reference battery in real time or at preset time intervals in a charging process of a charging and discharging test; then, in the discharging process of the charge-discharge test, only the target reference battery is discharged, and the first battery voltage and the first battery capacity are not required to be acquired, so that the charge-discharge test is completed once. And the like, completing the charge and discharge test of preset times.
In other embodiments, S110 may specifically include: in the charging process of the charging and discharging test, only the target reference battery is charged, and the first battery voltage and the first battery capacity are not required to be acquired; then, in the discharging process of the charge-discharge test, the first battery voltage and the first battery capacity of the target reference battery are periodically acquired in real time or at preset time intervals, thereby completing one charge-discharge test. And the like, completing the charge and discharge test of preset times.
In still other embodiments, the first battery voltage and the first battery capacity of the target reference battery are periodically acquired in real time or at preset time intervals during the charging process of the charge-discharge test; then, in the discharging process of the charge-discharge test, the first battery voltage and the first battery capacity of the target reference battery are periodically acquired in real time or at preset time intervals, thereby completing one charge-discharge test. And the like, completing the charge and discharge test of preset times.
It should be noted that, the specific duration of the preset time interval may be set by a person skilled in the art according to the actual situation, which is not limited herein. In addition, when the first battery voltage and the first battery capacity are acquired, the target reference battery may be in a charging or discharging state, or may be in a charging or discharging stopping state, which is not limited in the present disclosure.
Specifically, during the charging process of the charge-discharge test, the target reference battery may be continuously charged from the discharge cutoff voltage to the charge cutoff voltage continuously or intermittently. During the discharge process of the charge-discharge test, the target reference battery may be continuously or intermittently discharged from the charge cutoff voltage to the discharge cutoff voltage. The charge cutoff voltage refers to the voltage when the battery reaches a full charge state during the charging period, and if the battery still continues to charge after reaching the charge cutoff voltage, the battery is overcharged, which generally damages the performance and the service life of the battery. The discharge cut-off voltage refers to the lowest operating voltage value at which the battery is not suitable to continue discharging when the battery is discharged.
Specifically, in the charging process of the charge-discharge test, the target reference battery may be charged in a constant-power charging, a constant-current charging, a constant-voltage charging, or a step charging manner, but is not limited thereto. Similarly, in the discharging process of the charge-discharge test, for example, the calibration battery may be discharged by a constant-power discharging, a constant-current discharging, a constant-voltage discharging, or a step discharging method, but the present invention is not limited thereto.
Specifically, battery capacity is one of the important performance indicators for measuring battery performance, which represents the amount of electricity discharged from a battery under certain conditions (discharge rate, temperature, terminal voltage, etc.), typically in ampere-hours. And the first battery capacity is the battery capacity of the target reference battery obtained by performing charge and discharge tests on the target reference battery.
Specifically, the specific manner of obtaining the first battery capacity may be set by those skilled in the art according to the actual situation, and is not limited herein. For example, the first battery capacity may be obtained by a charge/discharge tester. For another example, the estimation of the battery capacity may be performed using a relevant characteristic curve or calculation formula according to some external characteristics of the target reference battery, such as a discharge current, a discharge time, and other relevant parameters. But is not limited thereto.
Specifically, before the target reference battery is subjected to the charge-discharge test, the target reference battery is connected to the detection circuit, and the first battery voltage is the battery voltage of the target reference battery obtained by the charge-discharge test for the target reference battery.
Specifically, the specific manner of obtaining the first battery voltage may be set by those skilled in the art according to the actual situation, and is not limited herein. For example, the first battery voltage may be obtained by a voltage tester such as a voltmeter. But is not limited thereto.
It can be appreciated that in the charging process of the charge and discharge test, since the static treatment is not required to be performed on the target reference battery in the middle, compared with the open-circuit voltage method in which the static treatment is required to be performed on the reference battery, the test method of the embodiment of the disclosure has the advantages that the time required for completing the primary charging process is shorter, the whole battery electric quantity test period is shortened, and the efficiency of determining the first association relationship is improved. Similarly, in the discharging process of the charge-discharge test, the target reference battery does not need to be subjected to standing treatment in the middle of the discharging process, so that the whole battery electric quantity testing period is further shortened, and the efficiency of determining the first association relation is further improved.
It can be further understood that, in the actual charge-discharge condition of the target battery, the target battery is usually connected to the circuit for supplying power, and at this time, the target battery voltage of the target battery obtained by detection is usually the battery voltage when the target battery is in the circuit, but not the battery voltage in the open circuit state, so that the second battery voltage obtained by correcting the first battery voltage obtained by detecting the target reference battery is closer to the target battery voltage of the target battery in the actual charge-discharge condition of the target battery, which is beneficial to accurately evaluating the target battery power of the target battery later.
S120, correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage.
In the embodiment of the disclosure, after the battery power testing device obtains the first battery voltage, the first battery voltage may be corrected based on a preset correction rule to obtain the second battery voltage.
Specifically, the preset correction rule may be any rule capable of compensating for the influence of the internal resistance of the target reference battery and the internal resistance of the detection circuit in which the target reference battery is located on the first battery voltage.
Specifically, the applicant finds that when the target reference battery is subjected to the charge-discharge test, the internal resistance of the target reference battery and the internal resistance of the detection circuit where the target reference battery is located bring about a voltage requirement, so that a difference exists between the measured first battery voltage and the actual battery voltage of the target reference battery. In view of this, the first battery voltage may be corrected based on a preset correction rule to obtain a second battery voltage that is more closely matched to the actual battery voltage of the target reference battery.
In some embodiments, the preset correction rules may include a lookup table of the first battery voltage and the second battery voltage. At this time, S120 may include searching for the second battery voltage corresponding to the first battery voltage from a comparison table of the first battery voltage and the second battery voltage.
In other embodiments, the preset correction rule may include a relational formula of the first battery voltage and the second battery voltage. At this time S120 may include: s121, when the first battery voltage is a voltage obtained in a charging process of the charge-discharge test, correcting the first battery voltage based on vtransfer=vccharge- (r1+r2) x I; and/or; s122, when the first battery voltage is the voltage obtained during the discharging process of the charge-discharge test, correcting the first battery voltage based on vtransfer=vccharge+ (r1+r2) x I.
Wherein, vtransfer is the second battery voltage, vcharge is the first battery voltage, R1 is the internal resistance of the target reference battery, and R2 is the internal resistance of the detection circuit where the target reference battery is located; i is the current corresponding to the first battery voltage, wherein I is only the current value and has no direction.
Specifically, the specific manner of obtaining R1 may be set by those skilled in the art according to the actual situation, and is not limited herein. For example, in the process of charging the target reference battery from the discharge cutoff voltage to the charge cutoff voltage, the real-time internal resistance of the target reference battery is obtained in real time, and the average value of each real-time internal resistance is calculated to obtain R1. But is not limited thereto.
Specifically, the specific manner of obtaining R2 may be set by those skilled in the art according to the actual situation, and is not limited herein. For example, the internal resistance of the detection circuit may be calculated based on the component parameters of each component in the detection circuit. For another example, the internal resistance of the electrical measurement circuit may be measured by a resistance tester such as a multimeter.
Specifically, the current corresponding to the first battery voltage refers to the current of the target reference battery when a certain first battery voltage is obtained. It will be appreciated by those skilled in the art that the actual battery voltage (i.e., the second battery voltage) of the target reference battery is equal to the detected first battery voltage minus the internal resistance of the target reference battery and the virtual voltage due to the internal resistance of the detection circuit. In the charging process of the charge-discharge test, electrons are lost from the positive electrode of the target reference battery, electrons are obtained from the negative electrode of the target reference battery, and the current is positive, so that vtransfer=vcharge- (r1+r2) ×i; during the discharging process of the charge-discharge test, electrons are obtained from the positive electrode of the target reference battery, electrons are lost from the negative electrode of the target reference battery, and the current is negative, so that vtransfer=vccharge- (r1+r2) ×i.
It can be understood that after the first battery voltage is corrected based on the preset correction rule, the obtained second battery voltage is closer to the actual battery voltage of the target reference battery, so that the first association relationship determined based on the second battery voltage is closer to the actual association relationship between the battery voltage and the battery power of the target reference battery, which is beneficial to improving the accuracy of the target battery power of the target battery estimated based on the first association relationship.
S130, calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity.
The reference battery capacity is the battery capacity of the target reference battery when the reference battery is full.
In the embodiment of the disclosure, when the battery power testing device obtains the first battery capacity, the ratio of the battery power testing device to the reference battery capacity can be calculated to obtain the first battery power corresponding to the first battery capacity.
Specifically, when the target reference battery is charged to the charge cutoff voltage, the target reference battery can be considered to be full, and at this time, the battery capacity of the target reference battery is the reference battery capacity. Note that, the specific charging manner of charging the target reference battery to the charge cutoff voltage may be the same as the specific charging manner of charging the target reference battery when the first battery capacity is acquired, but is not limited thereto.
Specifically, the battery Charge, i.e., state Of Charge (SOC). The first battery charge, i.e., the ratio of the first battery capacity to the reference battery capacity, may be expressed in terms of a percentage.
And S140, determining a first association relation based on the second battery voltage and the first battery power.
The first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery.
In the embodiment of the disclosure, the battery power testing device may determine the first association relationship when acquiring the second battery voltage and the corresponding first battery power acquired in each charge and discharge test for each target reference battery.
Specifically, the first association relationship may be any association relationship capable of representing a correspondence relationship between a battery voltage and a battery power of the target reference battery.
By way of example, the specific form of the first association relationship may include a curve, a formula, etc., but is not limited thereto.
In particular, S140 may be implemented in various embodiments, and a typical example will be described below and hereinafter, but is not limited thereto.
In some embodiments, S140 may specifically include: s1411, calculating a first average value of at least one second battery voltage corresponding to the same first battery power, and using the first average value as the battery voltage corresponding to the first battery power to determine a first association relationship.
In other embodiments, the number of target reference cells is plural, and S140 may specifically include: s1421, calculating a second average value of at least one second battery voltage corresponding to the same first battery electric quantity corresponding to each target reference battery, and taking the second average value as the battery voltage corresponding to the first battery electric quantity to determine a second sub-association relationship; s1422, fitting the second sub-association relations corresponding to the target reference batteries to determine a first association relation.
It can be understood that after the first association relationship is determined, the battery power testing device or other electronic devices preset with the first association relationship may obtain the target battery voltage of the target battery, and query the target battery power corresponding to the target battery voltage from the first association relationship, so as to estimate the battery power of the target battery.
The embodiment of the disclosure provides a battery electric quantity testing method, which can acquire a first battery voltage and a first battery capacity of a target reference battery; correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage; calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the reference battery is full; determining a first association based on the second battery voltage and the first battery level; the first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery. Therefore, according to the embodiment of the disclosure, the association relationship (i.e., the first association relationship) between the battery voltage and the battery power of the target reference battery can be determined, so that when the target battery voltage of the target battery is obtained, the target battery power corresponding to the target battery voltage can be queried based on the first association relationship, so that the estimation mode of the battery power is simple and efficient.
In still another embodiment of the present disclosure, S120 may specifically include: s121, in a charging process of a charging and discharging test, constant-current charging is carried out on a target reference battery by a preset charging current, and a first battery voltage and a first battery capacity are obtained; and/or; s122, in the discharging process of the charging and discharging test, constant-current discharging is conducted on the target reference battery with preset discharging current, and the first battery voltage and the first battery capacity are obtained.
Specifically, the specific values of the preset charging current and the preset discharging current can be set by those skilled in the art according to the actual situation, and are not limited herein. Alternatively, the preset charge current and the preset discharge current are each equal to or greater than 0.05C, for example, the second battery capacity of the target reference battery is 10 ampere-hours, and 0.05C is 0.5A. Thus, the time required for completing one-time charging process is shortened, and the test period is shortened.
Note that the preset charging current and the preset discharging current may be the same or different, and are not limited herein. And, the preset charging currents corresponding to the charging processes of different charging and discharging tests may be the same, or may be different, and the preset discharging currents corresponding to the discharging processes of different charging and discharging tests may be the same, which is not limited herein.
It can be understood that, during the charging process, when the target reference battery is charged with the preset charging current, because the charging current is constant, when the first battery voltage is corrected based on vtransfer=vcharge- (r1+r2) x I, the correction mode is simple, which is beneficial to improving the correction efficiency, and the charging current is not required to be acquired during the recharging process, which is beneficial to reducing the test workload. The same shall apply to the discharge process, and will not be described here again.
In yet another embodiment of the present disclosure, S140 may specifically include: s1431, determining a first sub-association relationship corresponding to a charging process based on a second battery voltage obtained in the charging process of each charging and discharging test and the corresponding first battery electric quantity of each target reference battery; the first sub-association relationship is an association relationship between the second battery voltage and the first battery power; and/or; determining a first sub-association relationship corresponding to a discharging process based on a second battery voltage and a first battery electric quantity corresponding to the second battery voltage acquired in the discharging process of each charging and discharging test aiming at each target reference battery; s1432, based on the first sub-association relations, the first association relation is determined.
Specifically, the first sub-association relationship may be any association relationship capable of representing a correspondence relationship between the second battery voltage and the first battery power of the target reference battery.
Illustratively, the specific form of the first sub-association relationship may include a curve, a formula, etc., but is not limited thereto.
In some embodiments, the number of target reference batteries is N, and based on S1431, a first sub-association relationship corresponding to the preset number of times of N charging processes may be obtained, where N is a positive integer. At this time, S1432 may include: and determining a first association relationship based on the first sub-association relationship corresponding to the preset times of N charging processes.
In other embodiments, the number of target reference cells is N, and based on S1431, the first sub-association relationship corresponding to the preset number of times×n discharging processes may be obtained. At this time, S1432 may include: and determining a first association relationship based on the first sub-association relationship corresponding to the preset times of the N discharging processes.
In still other embodiments, the number of target reference batteries is N, and based on S1431, the first sub-association relationships corresponding to the preset number of times×n charging processes and the first sub-association relationships corresponding to the preset number of times×n discharging processes may be obtained. At this time, S1432 may include: and determining the first incidence relation based on the preset times of 2N first sub-incidence relations.
In some embodiments, determining the first association based on each first sub-association may include: and calculating a third average value of the second battery voltage corresponding to the same first battery electric quantity after removing the maximum value and the minimum value, and taking the third average value as the battery voltage value corresponding to the first battery electric quantity to determine a first association relation.
In some embodiments, determining the first association based on each first sub-association may include: fitting the first sub-association relations to obtain first association relations.
Specifically, specific embodiments of the fitting process may include, but are not limited to, a least square method, and the like.
Fig. 2 is a schematic diagram of a first association relationship according to an embodiment of the disclosure. Referring to fig. 2, the first correlation obtained by fitting may be a two-dimensional curve, where the abscissa is the battery power and the ordinate is the battery voltage.
Optionally, the preset number of times of charge and discharge testing is greater than 1 for the target reference battery; and/or; the number N of target reference cells is greater than 1.
It can be understood that by setting the target frequency to be greater than 1, the detection frequency of the first battery voltage corresponding to the same first battery power can be increased, the influence of the detection error on the first association relationship is reduced, the finally obtained first association relationship is closer to the actual association relationship between the battery voltage and the battery power of the reference battery, and the battery power estimation accuracy is further improved.
It can be further understood that by setting the number of the target reference batteries to be greater than 1, the number of the test samples can be increased, the influence on the first association relationship caused by the individual difference of the target reference batteries is reduced, and the finally obtained first association relationship is closer to the actual association relationship between the battery voltage and the battery electric quantity of the reference batteries, so that the battery electric quantity estimation accuracy is improved.
In yet another embodiment of the present disclosure, the first correlation includes a battery voltage-battery charge curve; wherein, after determining the first association relationship based on the second battery voltage and the first battery power, the method further comprises: and selecting a plurality of battery voltages and corresponding battery electric quantity from the battery voltage-battery electric quantity curve to obtain a battery voltage and battery electric quantity comparison table.
In particular, the battery voltage and battery charge look-up table may include a plurality of numerical pairs of battery voltage and battery charge of the target reference battery.
Illustratively, the specific form of the first sub-association relationship may include a two-dimensional array, a table, etc., but is not limited thereto.
Specifically, the first association relationship includes battery power corresponding to any battery voltage between the discharging cut-off voltage and the charging cut-off voltage of the target reference battery, and a plurality of battery voltages and corresponding battery power thereof are selected from the first association relationship, namely a plurality of numerical pairs are selected, so that a battery voltage and a battery power comparison table can be obtained.
In some embodiments, a plurality of value pairs may be randomly selected.
In other embodiments, a plurality of pairs of values may be selected at intervals from a predetermined voltage.
It can be understood that, based on the first association relationship, after the battery voltage and the battery power comparison table are obtained, when the target battery voltage of the target battery is obtained in the use process of the target battery, the target battery power corresponding to the target battery voltage can be determined by querying the battery voltage and the battery power comparison table. The method for obtaining the electric quantity of the target battery by looking up the table is simple and easy to realize.
When the battery voltage and the battery level comparison table does not have the same battery voltage as the target battery voltage, the battery level corresponding to the battery voltage closest to the target battery voltage may be determined as the target battery level corresponding to the target battery voltage.
The embodiment of the disclosure further provides a battery power testing device for implementing the battery power testing method, and the following description is made with reference to fig. 2.
Fig. 3 is a schematic structural diagram of a battery power testing device according to an embodiment of the disclosure. As shown in fig. 3, the battery level testing apparatus 300 may include:
an obtaining module 310, configured to obtain a first battery voltage and a first battery capacity of a target reference battery in a process of performing a charge-discharge test for a preset number of times on the target reference battery;
The correction module 320 is configured to correct the first battery voltage based on a preset correction rule to obtain a second battery voltage;
the calculating module 330 is configured to calculate a ratio of the first battery capacity to the reference battery capacity, so as to obtain a first battery power corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the reference battery is full;
a determining module 340, configured to determine a first association relationship based on the second battery voltage and the first battery level;
the first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery.
The embodiment of the disclosure provides a battery electric quantity testing device, which can acquire a first battery voltage and a first battery capacity of a target reference battery in the process of carrying out charge and discharge tests for preset times on the target reference battery; correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage; calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the reference battery is full; determining a first association based on the second battery voltage and the first battery level; the first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery. Therefore, according to the embodiment of the disclosure, the association relationship (i.e., the first association relationship) between the battery voltage and the battery power of the target reference battery can be determined, so that when the target battery voltage of the target battery is obtained, the target battery power corresponding to the target battery voltage can be queried based on the first association relationship, so that the estimation mode of the battery power is simple and efficient.
In other embodiments of the present disclosure, the acquisition module 310 may include:
the first acquisition submodule is used for carrying out constant-current charging on the target reference battery with preset charging current in the charging process of the charging and discharging test, and acquiring a first battery voltage and a first battery capacity; and/or;
and the second acquisition submodule is used for performing constant-current discharge on the target reference battery with preset discharge current in the discharge process of the charge-discharge test, and acquiring the first battery voltage and the first battery capacity.
In yet another embodiment of the present disclosure, the correction module 320 may include:
the first correction submodule is used for correcting the first battery voltage based on the condition that vtransfer=vccharge- (r1+r2) I when the first battery voltage is the voltage obtained in the charging process of the charging and discharging test; and/or;
the second correction submodule is used for correcting the first battery voltage based on Vtransfer=Vccharge+ (R1+R2) I when the first battery voltage is the voltage obtained in the discharging process of the charge-discharge test;
wherein, vtransfer is the second battery voltage, vcharge is the first battery voltage, R1 is the internal resistance of the target reference battery, and R2 is the internal resistance of the detection circuit where the target reference battery is located; i is the current corresponding to the first battery voltage.
In yet another embodiment of the present disclosure, the determining module 340 may include:
the first determining sub-module is used for determining a first sub-association relationship corresponding to a charging process based on a second battery voltage obtained in the charging process of each charging and discharging test and the corresponding first battery electric quantity of the second battery for each target reference battery; the first sub-association relationship is an association relationship between the second battery voltage and the first battery power;
and/or;
the second determining sub-module is used for determining a first sub-association relationship corresponding to the discharging process based on the second battery voltage and the corresponding first battery electric quantity obtained in the discharging process of each charging and discharging test aiming at each target reference battery;
and the third determining sub-module is used for determining the first association relation based on each first sub-association relation.
In still another embodiment of the present disclosure, the third determining submodule is specifically configured to perform fitting processing on each first sub-association relationship to obtain the first association relationship.
In yet another embodiment of the present disclosure, the preset number of times is greater than 1; and/or; the number of target reference cells is greater than 1.
In yet another embodiment of the present disclosure, the first correlation includes a battery voltage-battery charge curve;
Wherein the apparatus further comprises: and the selection module is used for selecting a plurality of battery voltages and corresponding battery electric quantities from the battery voltage-battery electric quantity curves after determining the first association relation based on the second battery voltage and the first battery electric quantity so as to obtain a battery voltage and battery electric quantity comparison table.
It should be noted that, the battery power testing apparatus 300 shown in fig. 3 may perform the steps in the method embodiments shown in fig. 1 to 3, and implement the processes and effects in the method embodiments shown in fig. 1, which are not described herein.
Fig. 4 is a schematic structural diagram of a battery power testing device according to an embodiment of the present disclosure.
As shown in fig. 4, the battery level testing device may include a controller 401 and a memory 402 storing computer program instructions.
In particular, the controller 401 described above may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of embodiments of the present application.
The controller 401 reads and executes the computer program instructions stored in the memory 402 to perform the steps of the battery power testing method provided by the embodiments of the present disclosure.
In one example, the battery level testing device may also include a transceiver 403 and a bus 404. Wherein, as shown in fig. 4, the controller 401, the memory 402 and the transceiver 403 are connected by a bus 404 and perform communication with each other.
Bus 404 includes hardware, software, or both. By way of example, and not limitation, the buses may include an accelerated graphics port (Accelerated Graphics Port, AGP) or other graphics BUS, an enhanced industry standard architecture (Extended Industry Standard Architecture, EISA) BUS, a Front Side BUS (FSB), a HyperTransport (HT) interconnect, an industry standard architecture (Industrial Standard Architecture, ISA) BUS, an InfiniBand interconnect, a Low Pin Count (LPC) BUS, a memory BUS, a micro channel architecture (Micro Channel Architecture, MCa) BUS, a peripheral control interconnect (Peripheral Component Interconnect, PCI) BUS, a PCI-Express (PCI-X) BUS, a serial advanced technology attachment (Serial Advanced Technology Attachment, SATA) BUS, a video electronics standards association local (Video Electronics Standards Association Local Bus, VLB) BUS, or other suitable BUS, or a combination of two or more of these. Bus 404 may include one or more buses, where appropriate. Although embodiments of the present application describe and illustrate a particular bus, the present application contemplates any suitable bus or interconnect.
The disclosed embodiments also provide a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to implement the battery level testing method in the above embodiments.
The present embodiment provides a storage medium containing computer executable instructions which, when executed by a computer processor, are used to perform a battery level testing method comprising:
acquiring a first battery voltage and a first battery capacity of a target reference battery in the process of carrying out charge and discharge tests for preset times on the target reference battery;
correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage;
calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the reference battery is full;
determining a first association based on the second battery voltage and the first battery level;
the first association relationship is an association relationship between a battery voltage and a battery power of the target reference battery, and is used for determining a target battery power corresponding to the target battery voltage of the target battery.
Of course, the storage medium containing the computer executable instructions provided in the embodiments of the present disclosure is not limited to the above method operations, but may also perform the related operations in the battery power testing method provided in any embodiment of the present disclosure.
From the above description of embodiments, it will be apparent to those skilled in the art that the present disclosure may be implemented by means of software and necessary general purpose hardware, but may of course also be implemented by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present disclosure may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, etc., and includes several instructions for causing a computer cloud platform (which may be a personal computer, a server, or a network cloud platform, etc.) to execute the battery power testing method provided by the embodiments of the present disclosure.
Note that the above is only a preferred embodiment of the present disclosure and the technical principle applied. Those skilled in the art will appreciate that the present disclosure is not limited to the specific embodiments described herein, and that various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the disclosure. Therefore, while the present disclosure has been described in connection with the above embodiments, the present disclosure is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the present disclosure, the scope of which is determined by the scope of the appended claims.
Claims (10)
1. A battery power testing method, comprising:
acquiring a first battery voltage and a first battery capacity of a target reference battery;
correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage;
calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the target reference battery is full;
determining a first association based on the second battery voltage and the first battery level;
The first association relationship is an association relationship between the battery voltage and the battery power of the target reference battery, and the first association relationship is used for determining the target battery power corresponding to the target battery voltage of the target battery.
2. The method of claim 1, wherein the obtaining the first battery voltage and the first battery capacity of the target reference battery comprises:
in the charging process of the charging and discharging test, constant-current charging is carried out on the target reference battery by a preset charging current, and the first battery voltage and the first battery capacity are obtained; and/or;
and in the discharging process of the charging and discharging test, performing constant-current discharging on the target reference battery with preset discharging current, and acquiring the first battery voltage and the first battery capacity.
3. The method according to claim 1 or 2, wherein correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage comprises:
correcting the first battery voltage based on vtransfer=vcharge- (r1+r2) I when the first battery voltage is a voltage obtained in a charging process of a charge-discharge test; and/or;
Correcting the first battery voltage based on vtransfer=vcharge+ (r1+r2) I when the first battery voltage is a voltage obtained during a discharging process of a charge-discharge test;
the Vtransfer is the second battery voltage, the Vcharge is the first battery voltage, the R1 is the internal resistance of the target reference battery, and the R2 is the internal resistance of a detection circuit where the target reference battery is located; and I is the current corresponding to the first battery voltage.
4. The method of claim 3, wherein the determining a first association based on the second battery voltage and the first battery level comprises:
determining a first sub-association relationship corresponding to a charging process based on the second battery voltage obtained in the charging process of each charging and discharging test and the corresponding first battery electric quantity of each target reference battery; the first sub-association relationship is an association relationship between the second battery voltage and the first battery power;
and/or;
determining the first sub-association relationship corresponding to the discharging process based on the second battery voltage and the corresponding first battery electric quantity obtained in the discharging process of each charging and discharging test aiming at each target reference battery;
And determining the first association relation based on each first sub-association relation.
5. The method of claim 4, wherein the determining the first association based on each of the first sub-associations comprises:
fitting the first sub-association relations to obtain the first association relations.
6. The method of claim 5, wherein the predetermined number of charge and discharge tests performed on the target reference cell is greater than 1; and/or; the number of target reference cells is greater than 1.
7. The method of claim 1, wherein the first correlation comprises a battery voltage-battery charge curve;
wherein after determining the first association relationship based on the second battery voltage and the first battery power, the method further includes:
and selecting a plurality of battery voltages and the battery electric quantity corresponding to the battery voltages from the battery voltage-battery electric quantity curve to obtain a battery voltage and battery electric quantity comparison table.
8. A battery power testing device, comprising:
an acquisition module for acquiring a first battery voltage and a first battery capacity of a target reference battery;
The correction module is used for correcting the first battery voltage based on a preset correction rule to obtain a second battery voltage;
the calculating module is used for calculating the ratio of the first battery capacity to the reference battery capacity to obtain a first battery electric quantity corresponding to the first battery capacity; the reference battery capacity is the battery capacity of the target reference battery when the target reference battery is full;
the determining module is used for determining a first association relation based on the second battery voltage and the first battery electric quantity;
the first association relationship is an association relationship between the battery voltage and the battery power of the target reference battery, and the first association relationship is used for determining the target battery power corresponding to the target battery voltage of the target battery.
9. A battery power testing apparatus, comprising:
a processor and a memory;
the processor is configured to execute the steps of the battery level testing method according to any one of claims 1 to 7 by calling a program or instructions stored in the memory.
10. A computer-readable storage medium storing a program or instructions that cause a computer to perform the steps of the battery level testing method according to any one of claims 1 to 7.
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