CN106526490A - Limit working current obtaining method and device - Google Patents
Limit working current obtaining method and device Download PDFInfo
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- CN106526490A CN106526490A CN201610938344.6A CN201610938344A CN106526490A CN 106526490 A CN106526490 A CN 106526490A CN 201610938344 A CN201610938344 A CN 201610938344A CN 106526490 A CN106526490 A CN 106526490A
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- battery
- electric current
- operational data
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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]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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Abstract
The embodiment of the invention provides a method and a device for acquiring a limit working current. On one hand, the working data of the battery are collected, each group of working data comprises the working current of the battery and the resistance of the battery, and then the limit working current of the battery is obtained according to the working data of the battery. Therefore, the technical scheme provided by the embodiment of the invention can solve the problems of lower accuracy and higher acquisition cost when the limit working current of the battery is acquired in the prior art.
Description
【Technical field】
The present invention relates to cell art, more particularly to a kind of acquisition methods and device of maximal work electric current.
【Background technology】
As the demand to quick charge is improved constantly, the charging current and discharge current of battery is constantly elevated, makes
The operating current for obtaining battery is close to the maximal work electric current for being even more than battery, so as to accelerate the electrode material to battery
Structural damage, the electrical property decline of battery, polarization resistance are sharply increased, and battery-heating is serious.Therefore, in order to strengthen to battery
Operating current management and carry out early warning and safeguard measure, obtain battery maximal work electric current be particularly important.It is existing
In technology, the general maximal work electric current that battery is obtained by trying Current experiments method.
In process of the present invention is realized, inventor has found that at least there are the following problems in prior art：
In prior art, when obtaining the maximal work electric current of battery, one can only be obtained by substantial amounts of experimental data and be connect
The current value of near limit operating current, therefore, the maximal work electric current accuracy of acquisition is than relatively low；And, occupy substantial amounts of
Test resource and human cost, obtain less efficient, and procurement cost is higher.
【The content of the invention】
In view of this, the acquisition methods and device of a kind of maximal work electric current are embodiments provided, to solve
The problem that accuracy is relatively low and procurement cost is higher existed during the maximal work electric current that battery is obtained in prior art.
On the one hand, a kind of acquisition methods of maximal work electric current are embodiments provided, including：
The operational data of collection battery, per group of operational data include the operating current and the battery of the battery
Resistance；
According to the operational data, the maximal work electric current of the battery is obtained.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the work number
According to number be at least three groups.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, according to the work
Make data, obtain the maximal work electric current of the battery, including：
According to the operating current of battery described in per group of operational data and the incidence relation of the resistance of the battery, obtain
Take the maximal work electric current of the battery.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, per group of work
Make the operating current of battery described in data and the incidence relation of the resistance of the battery, including equation below：
Wherein, DCR is the resistance of the battery, and I is the operating current of the battery, IdFor the maximal work of the battery
Electric current, A and B are constant.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, obtain the electricity
The maximal work electric current in pond, including：
By the incidence relation and the operational data of the operating current of the battery and the resistance of the battery export to
Data processing tools, in order to the pass of operating current of the data processing tools according to the battery and the resistance of the battery
Operational data described in connection relation pair carries out data processing, and exports result；
According to the result of data processing tools output, the maximal work electric current of the battery is obtained.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, gather the electricity
The method of one group of operational data in pond includes：
Specifying in duration, applying assigned work electric current to the battery；
Collection first voltage and second voltage, the first voltage is the battery in the specified duration start time
Voltage, the second voltage are voltage of the battery in the specified duration finish time；
According to the first voltage and the absolute value of the difference of the second voltage and the assigned work electric current, obtain with
The resistance of the corresponding battery of the assigned work electric current.
A technical scheme in above-mentioned technical proposal has the advantages that：
In the embodiment of the present invention, by the operational data for gathering battery, every group of operational data includes the operating current of battery
With the resistance of battery, then, according to the operational data of battery, the maximal work electric current of battery is obtained.In the embodiment of the present invention, it is
The operational data of actual acquisition battery, obtains the maximal work electric current of battery based on the operational data of battery, and the process is kept away
Exempt from unnecessary error in substantial amounts of experimentation, improve the accuracy rate of data, it is ensured that the reliability of data；The opposing party
Face, in the embodiment of the present invention, it is only necessary to obtain several groups of operational datas of battery, it is not necessary to substantial amounts of test is carried out to battery, is subtracted
Lack the occupancy to test resource, saved human cost, improve acquisition efficiency, reduce procurement cost, be conducive to big rule
Mould is used；Thus, technical scheme provided in an embodiment of the present invention obtains the maximal work electric current of battery in solving prior art
When the problem that accuracy is relatively low and procurement cost is higher that exists.
On the other hand, the embodiment of the present invention additionally provides a kind of acquisition device of maximal work electric current, including：
Collecting unit, for gathering the operational data of battery, per group of operational data includes the work electricity of the battery
The resistance of stream and the battery；
Acquiring unit, for according to the operational data, obtaining the maximal work electric current of the battery.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the work number
According to number be at least three groups.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the acquisition list
Unit, specifically for：
According to the operating current of battery described in per group of operational data and the incidence relation of the resistance of the battery, obtain
Take the maximal work electric current of the battery.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, per group of work
Make the operating current of battery described in data and the incidence relation of the resistance of the battery, including equation below：
Wherein, DCR is the resistance of the battery, and I is the operating current of the battery, IdFor the maximal work of the battery
Electric current, A and B are constant.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the acquisition list
Unit, specifically for：
By the incidence relation and the operational data of the operating current of the battery and the resistance of the battery export to
Data processing tools, in order to the pass of operating current of the data processing tools according to the battery and the resistance of the battery
Operational data described in connection relation pair carries out data processing, and exports result；
According to the result of data processing tools output, the maximal work electric current of the battery is obtained.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the collection list
When unit is used to gather one group of operational data of the battery, specifically for：
Specifying in duration, applying assigned work electric current to the battery；
Collection first voltage and second voltage, the first voltage is the battery in the specified duration start time
Voltage, the second voltage are voltage of the battery in the specified duration finish time；
According to the first voltage and the absolute value of the difference of the second voltage and the assigned work electric current, obtain and institute
State the resistance of the corresponding battery of assigned work electric current.
A technical scheme in above-mentioned technical proposal has the advantages that：
In the embodiment of the present invention, the work number of battery is gathered by the collecting unit in the acquisition device of maximal work electric current
According to every group of operational data includes the resistance of the operating current and battery of battery, then, in the acquisition device of maximal work electric current
Operational data of the acquiring unit according to battery, obtains the maximal work electric current of battery.In the embodiment of the present invention, it is actual acquisition electricity
The operational data in pond, is obtained the maximal work electric current of battery based on the operational data of battery, be this process avoids substantial amounts of
Unnecessary error in experimentation, improves the accuracy rate of data, it is ensured that the reliability of data；On the other hand, the present invention
In embodiment, it is only necessary to obtain several groups of operational datas of battery, it is not necessary to carry out substantial amounts of test to battery, reduce to test
The occupancy of resource, has saved human cost, improves acquisition efficiency, reduces procurement cost, is conducive to extensive utilization；Such as
This, the standard that technical scheme provided in an embodiment of the present invention is present when obtaining the maximal work electric current of battery in solving prior art
The problem that really property is relatively low and procurement cost is higher.
【Description of the drawings】
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by to be used attached needed for embodiment
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this area
For those of ordinary skill, without having to pay creative labor, can be with other attached according to these accompanying drawings acquisitions
Figure.
Fig. 1 is the schematic flow sheet of the acquisition methods of the maximal work electric current provided by the embodiment of the present invention；
Fig. 2 is the first schematic diagram of the operational data of battery in the embodiment of the present invention and data fitting；
Fig. 3 is the second schematic diagram of the operational data of battery in the embodiment of the present invention and data fitting；
Fig. 4 is the 3rd schematic diagram of the operational data of battery in the embodiment of the present invention and data fitting；
Fig. 5 is the 4th schematic diagram of the operational data of battery in the embodiment of the present invention and data fitting；
Fig. 6 is the functional block diagram of the acquisition device of the maximal work electric current provided by the embodiment of the present invention.
【Specific embodiment】
In order to be better understood from technical scheme, below in conjunction with the accompanying drawings the embodiment of the present invention is retouched in detail
State.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
Its embodiment, belongs to the scope of protection of the invention.
The term for using in embodiments of the present invention is the purpose only merely for description specific embodiment, and is not intended to be limiting
The present invention." one kind ", " described " and " being somebody's turn to do " of singulative used in the embodiment of the present invention and appended claims
It is also intended to include most forms, unless context clearly shows that other implications.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation of description affiliated partner, represent
There may be three kinds of relations, for example, A and/or B can be represented：Individualism A, while there is A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent forward-backward correlation to liking a kind of relation of "or".
It will be appreciated that though voltage may be described using term first, second, third, etc. in embodiments of the present invention,
But these voltages should not necessarily be limited by these terms.These terms are only for voltage is distinguished from each other out.For example, without departing from the present invention
In the case of scope of embodiments, first voltage can also be referred to as second voltage, and similarly, second voltage can also be referred to as
One voltage.
Depending on linguistic context, word as used in this " if " can be construed to " ... when " or
" when ... " or " in response to determining " or " in response to detection ".Similarly, depending on linguistic context, phrase " if it is determined that " or
" if detection (condition or event of statement) " can be construed to " when it is determined that when " or " in response to determining " or " work as detection
When (condition or event of statement) " or " in response to detecting (condition or event of statement) ".
In the course of the work, electric current is affected from the speed that electrolyte is diffused into electrode surface battery by ion, and
A limiting value, referred to as maximal work electric current can be reached.The maximal work electric current of battery can be used as the operating current of battery
The upper limit, if the operating current of battery exceed battery maximal work electric current, the destruction to electrode structure can be accelerated, and cause electricity
The electrical property decline in pond, affects battery life.
In process of the present invention is realized, inventor has found that the maximal work electric current of battery is relevant with the overpotential of battery, electricity
The overpotential in pond can represent the additional energy maintained required for electrode reaction speed (current density), by the overpotential pair of battery
Electric current carries out the resistance that differential derivation can be obtained by battery；Therefore, the embodiment of the present invention is i.e. using the resistance of battery, battery
The operational datas such as operating current realize the acquisition of the maximal work electric current to battery.
Hereinafter, the acquisition to maximal work electric current is realized using the operational data of battery is specifically described.
Embodiment one
The embodiment of the present invention provides a kind of acquisition methods of maximal work electric current, refer to Fig. 1, and which is the embodiment of the present invention
The schematic flow sheet of the acquisition methods of the maximal work electric current for being provided, as shown in figure 1, the method is comprised the following steps：
S101, gathers the operational data of battery.
It should be noted that in the embodiment of the present invention, every group of operational data of battery can include but is not limited to battery
Operating current and battery resistance.
It should be noted that in the embodiment of the present invention, when gathering the operational data of battery, the number of operational data is at least
Three groups, wherein, the operational data per Battery pack includes the resistance of the operating current and a battery of a battery.
Specifically, the number of the operational data of the battery for collecting is more, the standard of the maximal work electric current of the battery for obtaining
Really rate is higher, therefore, the number of the operational data of collection in actual application, can be selected according to actual needs, so as to
In obtaining accurate result..
Specifically, in the embodiment of the present invention, when gathering the operational data of battery, with one group of operational data for gathering battery it is
Example is illustrated.Specifically, can specify duration in, to battery apply assigned work electric current, then, collection first voltage and
Second voltage, first voltage are battery in the voltage for specifying duration start time, and second voltage terminates in specified duration for battery
The voltage at moment, and then, according to first voltage and the absolute value and assigned work electric current of the difference of second voltage, get battery
Resistance, the resistance value are corresponding with assigned work electric current；Thus, having obtained the assigned work electric current and the electricity of battery including battery
One group of operational data of resistance.
During a concrete implementation, when obtaining the operational data of battery, it is possible to use method as above, root
According to the several assigned work electric currents for being actually needed the different numerical value of selection, the electricity of battery corresponding with assigned work electric current is respectively obtained
Resistance；Thus, the operational data of collection at least three Battery packs.
S102, according to the operational data of battery, obtains the maximal work electric current of battery.
Specifically, in the embodiment of the present invention, can be according in the operational data of the battery for collecting, in every group of operational data
The operating current of battery and the resistance of battery between relation, obtain battery maximal work electric current.
In a specific course of work, in the embodiment of the present invention, the overpotential of battery and the operating current of battery it
Between exist such as the relation in following formula.It should be noted that initial electricity of the overpotential of battery for the operating voltage and battery of battery
Difference between pressure, to show electrode potential and the equilibrium potential of this electrode reaction during an electrode reaction deviation balance
Difference.Operating current derivation of the overpotential of battery to battery obtains the resistance of battery.
Specifically, the expression formula of the overpotential of battery can be expressed as by formula (1)：
Wherein, η for battery overpotential, I for battery operating current, A and B be constant, i0For the exchanging electric current of battery,
IdFor the maximal work electric current of battery.
During a concrete implementation, physical resistances of the constant B for battery.Now, the embodiment of the present invention is comprehensively examined
The overpotential that the physical resistance of battery is produced to the impact (I × B) of the overpotential of battery, activation polarization internal resistance is consideredThe overpotential produced with concentration polarizationThus, obtaining the overpotential of battery and the work of battery
Make the relation between electric current.
Then, the pass by above-mentioned formula to operating current I derivations, between the resistance of the operating current and battery that obtain battery
Connection relation.Specifically, formula (2) as follows, in every group of operational data, the electricity of the operating current and battery of battery be refer to
Incidence relation between resistance includes：
Wherein, resistance of the DCR for battery, operating currents of the I for battery, IdFor the maximal work electric current of battery, A and B is
Constant.
It is understood that in the embodiment of the present invention, the resistance of battery can be including but not limited to：The physics electricity of battery
Resistance, activation polarization resistance and concentration polarization resistance.
Based on this, in the embodiment of the present invention, obtain battery maximal work electric current when, can by the operating current of battery with
The operational data of the incidence relation of the resistance of battery and the battery for collecting is exported to data processing tools, at data
The operational data that science and engineering has the battery according to the operating current of battery and the incidence relation of the resistance of battery to collecting enters line number
According to process, and result is exported, afterwards, the result of receiving data handling implement output, to obtain the limit work of battery
Make electric current.
It should be noted that in the embodiment of the present invention, data processing tools may be embodied in and obtain maximal work electric current
In executive agent, or, it is also possible to it is independently arranged at outside the executive agent, but can be called by the executive agent.
Specifically, data processing tools can be according to the operating current of battery in above-mentioned formula (2) and the resistance of battery
Incidence relation, the operational data of the battery to collecting carry out programming evaluation, and export result, and the result includes public affairs
The solution of all constants in formula (2).
It should be noted that the implementation that data processing tools carries out programming evaluation can be including but not limited to：Curve
At least one of fitting is solved and equation is solved.
Specifically, the implementation for being solved with curve matching is illustrated.In the coordinate of operating current-resistance composition
In system, at least three groups operational datas for collecting can show as at least three coordinate points；And data processing tools is according to above-mentioned
Formula (2) can obtain without several curves.In these curves, have and only one curve enables to this at least three seat
Punctuate can fall on this curve as much as possible.Therefore, data processing tools according to formula (2) to this at least three coordinate points
Carry out curve fitting, can just find this curve；After curve is obtained, all constants of the curve can be obtained, thus, just
Three constant (maximal work electric current I of battery in formula (2) are obtainedd, constant A and constant B) concrete numerical value, data processing
The result of instrument output contains the maximal work electric current I of batterydNumerical value, the numerical value of constant A and constant B number
Value, therefore, according to the result of data processing unit output, can just get the maximal work electric current I of batteryd。
It should be noted that the data processing tools can be including but not limited to：Origin, Excel, Matlab etc..
Specifically, it is intended that duration and assigned work electric current can be selected according to actual needs, the embodiment of the present invention pair
This is not particularly limited.
It should be noted that in the embodiment of the present invention, the maximal work electric current of battery and the state-of-charge of battery, battery
The state parameters such as temperature are relevant, therefore, when the maximal work electric current of said method acquisition battery is performed, keep the state of battery
Parameter is consistent, thus, obtaining maximal work electric current of the battery under the state parameter.
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, by the operational data for gathering battery, every group of operational data includes the operating current of battery
With the resistance of battery, then, according to the operational data of battery, the maximal work electric current of battery is obtained.In the embodiment of the present invention, it is
The operational data of actual acquisition battery, obtains the maximal work electric current of battery based on the operational data of battery, and the process is kept away
Exempt from unnecessary error in substantial amounts of experimentation, improve the accuracy rate of data, it is ensured that the reliability of data；The opposing party
Face, in the embodiment of the present invention, it is only necessary to obtain several groups of operational datas of battery, it is not necessary to substantial amounts of test is carried out to battery, is subtracted
Lack the occupancy to test resource, saved human cost, improve acquisition efficiency, reduce procurement cost, be conducive to big rule
Mould is used；Thus, technical scheme provided in an embodiment of the present invention obtains the maximal work electric current of battery in solving prior art
When the problem that accuracy is relatively low and procurement cost is higher that exists.
Embodiment two
The acquisition methods of the maximal work electric current provided based on embodiment one, the embodiment of the present invention are given a kind of by embodiment
Method described in one is applied to the specific embodiment of the laminated lithium ion battery of 15mAh.It is understood that the embodiment is only used
To illustrate this programme, not to limit the application.
Specifically, in the embodiment of the present invention, the state-of-charge of the laminated lithium ion battery of the 15mAh is 50%, and temperature is
25℃。
S201, obtains five groups of operational datas of battery, wherein, every group of operational data of battery includes the operating current of battery
With the resistance of battery.
Specifically, apply 3mA pulsed operation electric currents to lithium ion battery, and continue 10 seconds, by gathering the pulsed operation
The voltage change of battery before and after electric current, gets resistance value of the lithium ion battery under 3mA electric currents；Apply to lithium ion battery
6mA pulsed operation electric currents, and continue 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, get lithium
Resistance value of the ion battery under 6mA electric currents；Apply 10mA pulsed operation electric currents to lithium ion battery, and continue 10 seconds, pass through
The voltage change of battery before and after the pulsed operation electric current is gathered, resistance value of the lithium ion battery under 10mA electric currents is got；Give
Lithium ion battery applies 15mA pulsed operation electric currents, and continues 10 seconds, by the electricity for gathering battery before and after the pulsed operation electric current
Buckling, gets resistance value of the lithium ion battery under 15mA electric currents；Apply 30mA pulsed operation electric currents to lithium ion battery,
And continue 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, get lithium ion battery electric in 30mA
The resistance value for flowing down.Thus, obtaining five groups of operational datas of the laminated lithium ion battery of 15mAh.
S202, above-mentioned five groups of operational datas is exported to data processing tools, in order to data processing tools according to battery
Operating current and the resistance of battery between five groups of operational datas collecting of relation pair carry out data fitting.
Specifically, Fig. 2 is refer to, which is the first signal of the operational data of battery in the embodiment of the present invention and data fitting
Figure.As shown in Fig. 2 five groups of operational datas of battery that the point that solid line in Fig. 2 is located is got in being S201, in Fig. 2
Dotted line is data processing tools according to the relation of the operating current of the resistance and battery of battery, and above-mentioned five groups of operational datas are entered
Row curve matching, the matched curve for obtaining.
S203, receiving data handling implement output result, the fitting result include the maximal work electric current of battery.
Specifically, table 1 is refer to, which is the first result of data processing tools output, as shown in table 1, by right
Above-mentioned five groups of operational datas carry out data fitting, so as to the laminated lithium ion battery for being accurately obtained 15mAh in state-of-charge is
50%, it is 287.2mA that temperature is the maximal work electric current at 25 DEG C, wherein, the numerical value of the maximal work electric current is about battery and holds
20 times of amount.Therefore, when the charging current and discharge current to the battery is controlled to meet the demand of quick charge, can
With the operating current control by battery in below 287.2mA, to avoid asking for unnecessary product safety problem and battery failure
Topic.
Table 1
| A | 0.001299 |
| Id/A | 0.287214 |
| B | 2.105282 |
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, it is the operational data of actual acquisition battery, electricity is obtained based on the operational data of battery
The maximal work electric current in pond, this process avoids unnecessary error in substantial amounts of experimentation, improves the accuracy rate of data,
Ensure that the reliability of data；On the other hand, in the embodiment of the present invention, it is only necessary to obtain five groups of operational datas of battery, be not required to
Substantial amounts of test carried out to battery, reduce the occupancy to test resource, saved human cost, improve acquisition efficiency,
Procurement cost is reduced, is conducive to extensive utilization；Thus, technical scheme provided in an embodiment of the present invention solves prior art
The problem that accuracy is relatively low and procurement cost is higher existed during the maximal work electric current of middle acquisition battery.
Embodiment three
The acquisition methods of the maximal work electric current provided based on embodiment one, the embodiment of the present invention are given a kind of by embodiment
Method described in one is applied to the specific embodiment of the soft bag lithium ionic cell of 1Ah.It is understood that the embodiment only to
This programme is illustrated, not to limit the application.
Specifically, in the embodiment of the present invention, the state-of-charge of the soft bag lithium ionic cell of the 1Ah is 50%, and temperature is 25
℃。
S301, obtains five groups of operational datas of battery, wherein, every group of operational data of battery includes the operating current of battery
With the resistance of battery.
Specifically, apply 5A pulsed operation electric currents to lithium ion battery, and continue 10 seconds, by gathering the pulsed operation electricity
The voltage change of battery before and after stream, gets resistance value of the lithium ion battery under 5A electric currents；Apply 7A arteries and veins to lithium ion battery
Operating current is rushed, and continues 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, get lithium-ion electric
Resistance value of the pond under 7A electric currents；Apply 8A pulsed operation electric currents to lithium ion battery, and continue 10 seconds, by gathering the pulse
The voltage change of battery before and after operating current, gets resistance value of the lithium ion battery under 8A electric currents；Apply to lithium ion battery
Plus 9A pulsed operation electric currents, and continue 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, get lithium
Resistance value of the ion battery under 9A electric currents；Apply 10A pulsed operation electric currents to lithium ion battery, and continue 10 seconds, by adopting
Collect the voltage change of battery before and after the pulsed operation electric current, get resistance value of the lithium ion battery under 10A electric currents.Thus,
Obtain five groups of operational datas of the soft bag lithium ionic cell of 1Ah.
S302, above-mentioned five groups of operational datas is exported to data processing tools, in order to data processing tools according to battery
Operating current and the resistance of battery between five groups of operational datas collecting of relation pair carry out data fitting.
Specifically, Fig. 3 is refer to, which is the second signal of the operational data of battery in the embodiment of the present invention and data fitting
Figure.As shown in figure 3, five groups of operational datas of battery that the point that solid line in Fig. 3 is located is got in being S301, in Fig. 3
Dotted line is data processing tools according to the relation of the operating current of the resistance and battery of battery, and above-mentioned five groups of operational datas are entered
Row curve matching, the matched curve for obtaining.
S303, receiving data handling implement output result, the fitting result include the maximal work electric current of battery.
Specifically, table 2 is refer to, which is the second processing result of data processing tools output, as shown in table 2, by right
Above-mentioned five groups of operational datas carry out data fitting, so as to the soft bag lithium ionic cell for being accurately obtained 1Ah in state-of-charge is
50%, it is 34A that temperature is the maximal work electric current at 25 DEG C, wherein, the numerical value of the maximal work electric current is about battery capacity
34 times.Therefore, when the charging current and discharge current to the battery is controlled to meet the demand of quick charge, can be by
The operating current of battery is controlled in below 34A, to avoid the problem of unnecessary product safety problem and battery failure.
Table 2
| A | 0.00863 |
| Id/A | 34.14747 |
| B | 0.01419 |
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, it is the operational data of actual acquisition battery, electricity is obtained based on the operational data of battery
The maximal work electric current in pond, this process avoids unnecessary error in substantial amounts of experimentation, improves the accuracy rate of data,
Ensure that the reliability of data；On the other hand, in the embodiment of the present invention, it is only necessary to obtain five groups of operational datas of battery, be not required to
Substantial amounts of test carried out to battery, reduce the occupancy to test resource, saved human cost, improve acquisition efficiency,
Procurement cost is reduced, is conducive to extensive utilization；Thus, technical scheme provided in an embodiment of the present invention solves prior art
The problem that accuracy is relatively low and procurement cost is higher existed during the maximal work electric current of middle acquisition battery.
Example IV
The acquisition methods of the maximal work electric current provided based on embodiment one, the embodiment of the present invention are given a kind of by embodiment
Method described in one is applied to the specific embodiment of the soft bag lithium ionic cell of 2Ah.It is understood that the embodiment only to
This programme is illustrated, not to limit the application.
Specifically, in the embodiment of the present invention, the state-of-charge of the soft bag lithium ionic cell of the 2Ah is 50%, and temperature is 25
℃。
S401, obtains five groups of operational datas of battery, wherein, every group of operational data of battery includes the operating current of battery
With the resistance of battery.
Specifically, apply 1.75A pulsed operation electric currents to lithium ion battery, and continue 10 seconds, by gathering the pulse work
Make the voltage change of battery before and after electric current, get resistance value of the lithium ion battery under 1.75A electric currents；Apply to lithium ion battery
Plus 3.53A pulsed operation electric currents, and continue 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, obtain
To resistance value of the lithium ion battery under 3.53A electric currents；Apply 7.07A pulsed operation electric currents to lithium ion battery, and continue 10
Second, by the voltage change for gathering battery before and after the pulsed operation electric current, get electricity of the lithium ion battery under 7.07A electric currents
Resistance；Apply 14.15A pulsed operation electric currents to lithium ion battery, and continue 10 seconds, before and after gathering the pulsed operation electric current
The voltage change of battery, gets resistance value of the lithium ion battery under 14.15A electric currents；Apply 21.22A to lithium ion battery
Pulsed operation electric current, and continue 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, gets lithium ion
Resistance value of the battery under 21.22A electric currents.Thus, obtaining five groups of operational datas of the soft bag lithium ionic cell of 2Ah.
S402, above-mentioned five groups of operational datas is exported to data processing tools, in order to data processing tools according to battery
Operating current and the resistance of battery between five groups of operational datas collecting of relation pair carry out data fitting.
Specifically, Fig. 4 is refer to, which is the 3rd signal of the operational data of battery in the embodiment of the present invention and data fitting
Figure.As shown in figure 4, five groups of operational datas of battery that the point that solid line in Fig. 4 is located is got in being S401, in Fig. 4
Dotted line is the incidence relation of resistance of the data processing tools according to battery and the operating current of battery, to above-mentioned five groups of work numbers
According to carrying out curve fitting, the matched curve for obtaining.
S403, receiving data handling implement output result, the fitting result include the maximal work electric current of battery.
Specifically, table 3 is refer to, which is the 3rd result of data processing tools output, as shown in table 3, by right
Above-mentioned five groups of operational datas carry out data fitting, so as to the soft bag lithium ionic cell for being accurately obtained 2Ah in state-of-charge is
50%, it is 71.37A that temperature is the maximal work electric current at 25 DEG C, wherein, the numerical value of the maximal work electric current is about battery capacity
35.6 times.Therefore, when the charging current and discharge current to the battery is controlled to meet the demand of quick charge, can
With the operating current control by battery in below 71.37A, to avoid asking for unnecessary product safety problem and battery failure
Topic.
Table 3
| A | 0.008832954 |
| Id/A | 71.37500253 |
| B | 0.22730539 |
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, it is the operational data of actual acquisition battery, electricity is obtained based on the operational data of battery
The maximal work electric current in pond, this process avoids unnecessary error in substantial amounts of experimentation, improves the accuracy rate of data,
Ensure that the reliability of data；On the other hand, in the embodiment of the present invention, it is only necessary to obtain five groups of operational datas of battery, be not required to
Substantial amounts of test carried out to battery, reduce the occupancy to test resource, saved human cost, improve acquisition efficiency,
Procurement cost is reduced, is conducive to extensive utilization；Thus, technical scheme provided in an embodiment of the present invention solves prior art
The problem that accuracy is relatively low and procurement cost is higher existed during the maximal work electric current of middle acquisition battery.
Embodiment five
The acquisition methods of the maximal work electric current provided based on embodiment one, the embodiment of the present invention are given a kind of by embodiment
Method described in one is applied to the specific embodiment of the lithium ion battery with hard shell of 7.6Ah.It is understood that the embodiment is only used
To illustrate this programme, not to limit the application.
Specifically, in the embodiment of the present invention, the state-of-charge of the lithium ion battery with hard shell of the 7.6Ah is 50%, and temperature is
25℃。
S501, obtains five groups of operational datas of battery, wherein, every group of operational data of battery includes the operating current of battery
With the resistance of battery.
Specifically, apply 76A pulsed operation electric currents to lithium ion battery, and continue 10 seconds, by gathering the pulsed operation
The voltage change of battery before and after electric current, gets resistance value of the lithium ion battery under 76A electric currents；Apply to lithium ion battery
114A pulsed operation electric currents, and continue 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, get lithium
Resistance value of the ion battery under 114A electric currents；Apply 228A pulsed operation electric currents to lithium ion battery, and continue 10 seconds, pass through
The voltage change of battery before and after the pulsed operation electric current is gathered, resistance value of the lithium ion battery under 228A electric currents is got；Give
Lithium ion battery applies 266A pulsed operation electric currents, and continues 10 seconds, by the electricity for gathering battery before and after the pulsed operation electric current
Buckling, gets resistance value of the lithium ion battery under 266A electric currents；Apply 304A pulsed operation electric currents to lithium ion battery,
And continue 10 seconds, by the voltage change for gathering battery before and after the pulsed operation electric current, get lithium ion battery electric in 304A
The resistance value for flowing down.Thus, obtaining five groups of operational datas of the lithium ion battery with hard shell of 7.6Ah.
S502, above-mentioned five groups of operational datas is exported to data processing tools, in order to data processing tools according to battery
Operating current and the resistance of battery between five groups of operational datas collecting of relation pair carry out data fitting.
Specifically, Fig. 5 is refer to, which is the 4th signal of the operational data of battery in the embodiment of the present invention and data fitting
Figure.As shown in figure 5, five groups of operational datas of battery that the point that solid line in Fig. 5 is located is got in being S501, in Fig. 5
Dotted line is the incidence relation of resistance of the data processing tools according to battery and the operating current of battery, to above-mentioned five groups of work numbers
According to carrying out curve fitting, the matched curve for obtaining.
S503, receiving data handling implement output result, the fitting result include the maximal work electric current of battery.
Specifically, table 4 is refer to, which is the schematic diagram of the fourth process result of data processing tools output, such as 4 institute of table
Show, by carrying out data fitting to above-mentioned five groups of operational datas, so as to be accurately obtained the lithium ion battery with hard shell of 7.6Ah in lotus
Electricity condition is 50%, and it is 314.7mA that temperature is the maximal work electric current at 25 DEG C, wherein, the numerical value of the maximal work electric current is about
For 41.4 times of battery capacity.Therefore, it is controlled to meet quick charge in the charging current and discharge current to the battery
Demand when, the operating current of battery can be controlled in below 314.7A, to avoid unnecessary product safety problem and electricity
The problem of pond failure.
Table 4
| A | 0.026776347 |
| Id/A | 314.7275637 |
| B | 0.001631726 |
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, it is the operational data of actual acquisition battery, electricity is obtained based on the operational data of battery
The maximal work electric current in pond, this process avoids unnecessary error in substantial amounts of experimentation, improves the accuracy rate of data,
Ensure that the reliability of data；On the other hand, in the embodiment of the present invention, it is only necessary to obtain five groups of operational datas of battery, be not required to
Substantial amounts of test carried out to battery, reduce the occupancy to test resource, saved human cost, improve acquisition efficiency,
Procurement cost is reduced, is conducive to extensive utilization；Thus, technical scheme provided in an embodiment of the present invention solves prior art
The problem that accuracy is relatively low and procurement cost is higher existed during the maximal work electric current of middle acquisition battery.
Embodiment six
The acquisition methods of the maximal work electric current provided based on above-described embodiment one, the embodiment of the present invention are further given
Realize the device embodiment of each step and method in said method embodiment.
Fig. 6 is refer to, the functional block diagram of the acquisition device of its maximal work electric current provided by the embodiment of the present invention.
As shown in fig. 6, the device includes：
Collecting unit 61, for gathering the operational data of battery, every group of operational data includes the operating current and electricity of battery
The resistance in pond；
Acquiring unit 62, for the operational data according to battery, obtains the maximal work electric current of battery.
Specifically, in the embodiment of the present invention, the number of the operational data of battery is at least three groups.
Specifically, in the embodiment of the present invention, acquiring unit 62, specifically for：
According to the operating current of battery in every group of operational data and the incidence relation of the resistance of battery, the limit of battery is obtained
Operating current.
During a concrete implementation, the operating current of battery and associating for the resistance of battery in every group of operational data
Relation includes：
Wherein, resistance of the DCR for battery, operating currents of the I for battery, IdFor the maximal work electric current of battery, A and B is
Constant.
Specifically, in the embodiment of the present invention, acquiring unit 62, specifically for：
Operational data of the operating current of battery with the incidence relation and battery of the resistance of battery is exported at data
Science and engineering has, the work in order to data processing tools according to the operating current of battery and the incidence relation of the resistance of battery to battery
Data carry out data processing, and export result；
According to the result of data processing tools output, the maximal work electric current of battery is obtained.
Specifically, it is in the embodiment of the present invention, when collecting unit 61 is used to gather one group of operational data of battery, concrete to use
In：
Specifying in duration, applying assigned work electric current to battery；
Collection first voltage and second voltage, first voltage are voltage of the battery in specified duration start time, and second is electric
Press the voltage for being battery in specified duration finish time；
According to first voltage and the absolute value and assigned work electric current of the difference of second voltage, obtain and assigned work electric current pair
The resistance of the battery answered.
As each unit in the present embodiment is able to carry out the method shown in Fig. 1, the part that the present embodiment is not described in detail,
Refer to the related description to Fig. 1.
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, the work number of battery is gathered by the collecting unit in the acquisition device of maximal work electric current
According to every group of operational data includes the resistance of the operating current and battery of battery, then, in the acquisition device of maximal work electric current
Operational data of the acquiring unit according to battery, obtains the maximal work electric current of battery.In the embodiment of the present invention, it is actual acquisition electricity
The operational data in pond, is obtained the maximal work electric current of battery based on the operational data of battery, be this process avoids substantial amounts of
Unnecessary error in experimentation, improves the accuracy rate of data, it is ensured that the reliability of data；On the other hand, the present invention
In embodiment, it is only necessary to obtain several groups of operational datas of battery, it is not necessary to carry out substantial amounts of test to battery, reduce to test
The occupancy of resource, has saved human cost, improves acquisition efficiency, reduces procurement cost, is conducive to extensive utilization；Such as
This, the standard that technical scheme provided in an embodiment of the present invention is present when obtaining the maximal work electric current of battery in solving prior art
The problem that really property is relatively low and procurement cost is higher.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
In several embodiments provided by the present invention, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematic, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example, multiple units or group
Part can with reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown
Or discuss coupling each other direct-coupling or communication connection can be by the indirect of some interfaces, device or unit
Coupling is communicated to connect, and can be electrical, mechanical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can local to be located at one, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, is used so that a computer including some instructions
Device (can be personal computer, server, or network equipment etc.) or processor (Processor) perform the present invention each
The part steps of embodiment methods described.And aforesaid storage medium includes：USB flash disk, portable hard drive, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements done etc. are should be included within the scope of protection of the invention.
Claims (12)
1. a kind of acquisition methods of maximal work electric current, it is characterised in that methods described includes：
The operational data of collection battery, the operational data include the resistance of the operating current of the battery and the battery；
According to the operational data, the maximal work electric current of the battery is obtained.
2. method according to claim 1, it is characterised in that the number of the operational data is at least three groups.
3. method according to claim 2, it is characterised in that according to the operational data, obtain the limit of the battery
Operating current, including：
According to the operating current of battery described in per group of operational data and the incidence relation of the resistance of the battery, institute is obtained
State the maximal work electric current of battery.
4. method according to claim 3, it is characterised in that the operating current of battery described in per group of operational data
Include with the incidence relation of the resistance of the battery：
Wherein, DCR is the resistance of the battery, and I is the operating current of the battery, IdFor the maximal work electric current of the battery,
A and B is constant.
5. the method according to claim 3 or 4, it is characterised in that obtain the maximal work electric current of the battery, including：
Incidence relation and the operational data of the operating current of the battery with the resistance of the battery is exported to data
Handling implement, in order to the data processing tools according to the operating current of the battery and associating for the resistance of the battery
System carries out data processing to the operational data, and exports result；
According to the result of data processing tools output, the maximal work electric current of the battery is obtained.
6. method according to claim 2, it is characterised in that the method bag of one group of operational data of the collection battery
Include：
Specifying in duration, applying assigned work electric current to the battery；
Collection first voltage and second voltage, the first voltage is electricity of the battery in the specified duration start time
Pressure, the second voltage is voltage of the battery in the specified duration finish time；
According to the first voltage and the absolute value of the difference of the second voltage and the assigned work electric current, obtain with it is described
The resistance of the corresponding battery of assigned work electric current.
7. a kind of acquisition device of maximal work electric current, it is characterised in that described device includes：
Collecting unit, for gathering the operational data of battery, the operational data includes the operating current of the battery and described
The resistance of battery；
Acquiring unit, for according to the operational data, obtaining the maximal work electric current of the battery.
8. device according to claim 7, it is characterised in that the number of the operational data is at least three groups.
9. device according to claim 8, it is characterised in that the acquiring unit, specifically for：
According to the operating current of battery described in per group of operational data and the incidence relation of the resistance of the battery, institute is obtained
State the maximal work electric current of battery.
10. device according to claim 9, it is characterised in that the work electricity of battery described in per group of operational data
Stream is included with the incidence relation of the resistance of the battery：
Wherein, DCR is the resistance of the battery, and I is the operating current of the battery, IdFor the maximal work electric current of the battery,
A and B is constant.
11. devices according to claim 9 or 11, it is characterised in that the acquiring unit, specifically for：
Incidence relation and the operational data of the operating current of the battery with the resistance of the battery is exported to data
Handling implement, in order to the data processing tools according to the operating current of the battery and associating for the resistance of the battery
System carries out data processing to the operational data, and exports result；
According to the result of data processing tools output, the maximal work electric current of the battery is obtained.
12. devices according to claim 7, it is characterised in that the collecting unit is used for gather the battery one group
During operational data, specifically for：
Specifying in duration, applying assigned work electric current to the battery；
Collection first voltage and second voltage, the first voltage is electricity of the battery in the specified duration start time
Pressure, the second voltage is voltage of the battery in the specified duration finish time；
According to the first voltage and the absolute value of the difference of the second voltage and the assigned work electric current, obtain and the finger
Determine the resistance of the corresponding battery of operating current.
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