CN108919125A - Internal resistance of cell detection method and device - Google Patents
Internal resistance of cell detection method and device Download PDFInfo
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- CN108919125A CN108919125A CN201810289552.7A CN201810289552A CN108919125A CN 108919125 A CN108919125 A CN 108919125A CN 201810289552 A CN201810289552 A CN 201810289552A CN 108919125 A CN108919125 A CN 108919125A
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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]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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Abstract
The invention discloses a kind of internal resistance of cell detection method and device.Internal resistance of cell detection method includes：The internal resistance measurement value R that acquisition battery is carved at the beginning1；The resistance sequence of initial time is established, the resistance sequence of initial time includes N number of element, wherein the 1st to the N-1 element is internal resistance initial value R0, n-th element is the internal resistance measurement value R of initial time1, wherein N is the natural number more than or equal to 2；The internal resistance value that battery is carved at the beginning is determined according to the resistance sequence of initial time.The present invention solves in practical application scene, the problem not high to internal resistance of cell accuracy rate of testing result.
Description
Technical field
The present invention relates to field of batteries, and in particular to a kind of internal resistance of cell detection method and device.
Background technique
Internal resistance of cell value is one of important parameter of battery, it is the key indexes such as state, power, the service life for characterizing battery
Important symbol.In the lab, exchange pressure drop internal resistance measurement method, direct-current discharge internal resistance survey the internal resistance value detection of battery
A variety of detection methods such as amount method usually have very high accuracy.In practical application scene, obtaining the internal resistance of cell usually has two
Kind method：One is look-up tables, i.e. the internal resistance value in experimental determination battery under various varying environments, state, are made into table,
In actual use, table look-at when needing to obtain the internal resistance of cell, the internal resistance of cell precision obtained in this way is high, but not
It is enough flexible.When internal resistance changes caused by battery is because of factors such as damages, for example, the bronze medal between battery and battery links loosening
When, pass through missing by a mile for the estimation to the internal resistance of cell of tabling look-up；Another is detection method, since practical application scene is difficult to reach
Testing conditions into laboratory, equipment are compared generally also simpler and cruder in laboratory, thus the obtained internal resistance data of detection are logical
Often with there is biggish noise.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of internal resistance of cell detection method and device, to solve actually answering
With in scene, the problem not high to internal resistance of cell accuracy rate of testing result.
According in a first aspect, the embodiment of the invention provides a kind of internal resistance of cell detection methods, including：Battery is acquired first
The internal resistance measurement value R at moment beginning1；The resistance sequence of initial time is established, the resistance sequence of the initial time includes N number of member
Element, wherein the 1st to the N-1 element is internal resistance initial value R0, n-th element is the internal resistance measurement value R of initial time1,
In, N is the natural number more than or equal to 2；In determining that the battery is carved at the beginning according to the resistance sequence of the initial time
Resistance value.
With reference to first aspect, in first aspect first embodiment, this method further includes acquiring battery at current time
Internal resistance measurement value R2；By the internal resistance measurement value R at current time2It is put on last position of the resistance sequence of previous moment, and will
The first of the resistance sequence of previous moment is displaced out, to form the resistance sequence at current time；According to the electricity at the current time
Resistance sequence determines the battery in the internal resistance value at current time.
With reference to first aspect, it in first aspect second embodiment, is determined according to the resistance sequence of the initial time
The internal resistance value that the battery is carved at the beginning includes：The resistance sequence of the initial time is fitted, the battery is obtained
The fitting a straight line carved at the beginning of internal resistance；The internal resistance value that the battery is carved at the beginning is determined according to the fitting a straight line.
First embodiment with reference to first aspect, in first aspect third embodiment, according to the current time
Resistance sequence determines that internal resistance value of the battery at current time includes：The resistance sequence at the current time is fitted,
Obtain fitting a straight line of the internal resistance at current time of the battery；Determine the battery at current time according to the fitting a straight line
Internal resistance value.
Second embodiment with reference to first aspect, in the 4th embodiment of first aspect, to the electricity of the initial time
Resistance sequence is fitted, and is obtained the fitting a straight line that the internal resistance of the battery is carved at the beginning and is included：Rectangular coordinate system is established, by institute
It is corresponding with the abscissa of the rectangular coordinate system to state element position in the resistance sequence, by the numerical value of the element with it is described
The ordinate of rectangular coordinate system is corresponding；Using least square method, determine that the fitting of N number of element in the resistance sequence is straight
The linear equation of line.
According to second aspect, the embodiment of the invention provides a kind of internal resistance of cell detection methods, including, acquire working as battery
Preceding internal resistance measurement value Rm, wherein current internal resistance measurement value RmIt is collected for the m times, m is natural number；In current
Hinder measured value RmIt is put into last position of the previous resistance sequence including N number of element, and by the first of the previous resistance sequence
It is displaced out, to form current resistance sequence, wherein work as m>When N, N number of element of the previous resistance sequence is followed successively by the m-N times
To the internal resistance of cell measured value R obtained when the m-1 times acquisitionm-NTo Rm-1, wherein N is the natural number more than or equal to 2；According to described
Current resistance sequence determines the current internal resistance value of the battery.
In conjunction with second aspect, in second aspect first embodiment, this method further includes, described previous as m≤N
1st to the N-m+1 element of resistance sequence is internal resistance initial value R0, the N-m+2 element to n-th element be followed successively by
The internal resistance of cell measured value R obtained when 1 time to the m-1 times acquisition1To Rm-1。
In conjunction with second aspect, in second aspect second embodiment, the electricity is determined according to the current resistance sequence
The current internal resistance value in pond, including：The current resistance sequence is fitted, obtains the internal resistance of the battery in current fitting
Straight line；Determine the battery in current internal resistance value according to the fitting a straight line.
According to the third aspect, the embodiment of the invention provides internal resistance of cell detection devices, including：First acquisition module is used
In the internal resistance measurement value R that acquisition battery is carved at the beginning1；First processing module, for establishing the resistance sequence of initial time, institute
The resistance sequence for stating initial time includes N number of element, wherein the 1st to the N-1 element is internal resistance initial value R0, n-th member
Element is the internal resistance measurement value R of initial time1, wherein N is the natural number more than or equal to 2；First computing module, for according to institute
The resistance sequence for stating initial time determines the internal resistance value that the battery is carved at the beginning.
According to fourth aspect, the embodiment of the invention provides internal resistance of cell detection devices, including：Second acquisition module is used
In the current internal resistance measurement value R of acquisition batterym, wherein current internal resistance measurement value RmIt is collected for the m times, m is nature
Number；Second processing module, for by current internal resistance measurement value RmIt is put into last of the previous resistance sequence including N number of element
Position, and the first of the previous resistance sequence is displaced out, to form current resistance sequence, wherein work as m>It is described previous when N
N number of element of resistance sequence is followed successively by the internal resistance of cell measured value R obtained when the m-N times to the m-1 times acquisitionm-NTo Rm-1,
Middle N is the natural number more than or equal to 2；Third computing module, for determining working as the battery according to the current resistance sequence
Preceding internal resistance value.
According to the 5th aspect, the embodiment of the invention provides a kind of electronic equipment, including：Memory and processor, it is described
Connection is communicated with each other between memory and the processor, computer instruction is stored in the memory, and the processor is logical
It crosses and executes the computer instruction, thereby executing any one embodiment or second aspect of first aspect, first aspect
Described in internal resistance of cell detection method.
It is described computer-readable the embodiment of the invention provides a kind of computer readable storage medium according to the 6th aspect
Storage medium stores computer instruction, and the computer instruction is for making the computer execute first aspect or first aspect
Any one embodiment described in internal resistance of cell detection method.
The internal resistance measurement value R that the present invention is carved at the beginning by acquiring battery1；Establish the resistance sequence of initial time, institute
The resistance sequence for stating initial time includes N number of element, wherein the 1st to the N-1 element is internal resistance initial value R0, n-th member
Element is the internal resistance measurement value R of initial time1, wherein N is the natural number more than or equal to 2；According to the resistance sequence of the initial time
Column determine the internal resistance value that the battery is carved at the beginning, and the present invention determines battery by establishing resistance sequence, by resistance sequence
Internal resistance value, it is ensured that the stabilization of data and accurate, obtained internal resistance of cell value can be more nearly the true value of resistance, mention
The high accuracy of internal resistance detection result.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 shows a kind of flow chart of optional internal resistance of cell detection method according to embodiments of the present invention；
Fig. 2 shows one kind according to embodiments of the present invention optionally to determine fitting a straight line according to the resistance sequence of initial time
Schematic diagram；
Fig. 3 shows one kind according to embodiments of the present invention and optionally determines fitting a straight line according to the resistance sequence at current time
Schematic diagram；
Fig. 4 shows the flow chart of another optional internal resistance of cell detection method according to embodiments of the present invention；
Fig. 5 shows a kind of schematic diagram of optional internal resistance of cell detection device according to embodiments of the present invention；
Fig. 6 shows the schematic diagram of another optional internal resistance of cell detection device according to embodiments of the present invention；
Fig. 7 shows a kind of schematic diagram of optional electronic equipment according to an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Embodiment one
The embodiment of the invention provides a kind of detection methods of optional internal resistance of cell, as shown in Figure 1, this method includes：
S11, the internal resistance measurement value R that acquisition battery is carved at the beginning1。
Specifically, internal resistance measurement value R1It can be and obtained by the ratio calculation of voltage change and curent change, it can also be with
It is in practical application scene, the method for other existing detection internal resistances of cell detects to obtain.It should be noted that by existing
The internal resistance measurement value R that technology detects1, since detection device precision is not high, testing conditions are more simple and crude, usually have certain
Error.
S12 establishes the resistance sequence of initial time, and the resistance sequence of the initial time includes N number of element, wherein the 1st
A to the N-1 element is initial value R0, n-th element is the internal resistance measurement value R of initial time1, wherein N is more than or equal to 2
Natural number, the initial value R0Such as it can be measured in the lab according to HPPC test method.
Specifically, resistance sequence can be a series of numerical value for indicating resistance.Resistance sequence may include N number of element, N
For the natural number more than or equal to 2, for example, N can be equal to 3,5 etc..The quantity for the element for including in resistance sequence is different, calculates
The susceptibility for obtaining the internal resistance value of battery is also different.When susceptibility is high, lesser numerical value can be taken for N, it is not high in susceptibility
In the case of, biggish numerical value can be taken for N.As N=5, the resistance sequence of initial time can be S1={ R0, R0, R0, R0,
R1}。
S13 determines the internal resistance value that the battery is carved at the beginning according to the resistance sequence of the initial time.
In an optional embodiment, determine that the battery is carved at the beginning according to the resistance sequence of the initial time
Internal resistance value may include：
The resistance sequence of the initial time is fitted, it is straight to obtain the fitting that the internal resistance of the battery is carved at the beginning
Line.
The internal resistance value that the battery is carved at the beginning is determined according to the fitting a straight line.
As shown in connection with fig. 2, for example, as N=5, the resistance sequence of initial time is S1={ R0, R0, R0, R0, R1, fitting
Available fitting a straight line y afterwards1=a0+a1X, according to fitting a straight line y1=a0+a1X determines the internal resistance value that battery is carved at the beginning.
It should be noted that, in cell operating conditions stabilization, battery fault-free, fitting a straight line shows as Yi Tiaoshui when practical application
Horizontal line.It is unstable in working environment, such as environment temperature decline or battery are when something goes wrong, the internal resistance of cell becomes larger, and fitting is straight
Line shows as an increasing function.
S14, internal resistance measurement value R of the acquisition battery at current time2。
S15, by the internal resistance measurement value R at current time2Be put on last position of the resistance sequence of previous moment, and will before
The first of the resistance sequence at one moment is displaced out, to form the resistance sequence at current time.
S16 determines the battery in the internal resistance value at current time according to the resistance sequence at the current time.
As shown in connection with fig. 3, in N=5, the resistance sequence S at current time2={ R0, R0, R0, R1, R2, it can be with after fitting
Obtain fitting a straight line y2=b0+b1X, according to fitting a straight line y2=b0+b1X determines the internal resistance value that battery is carved at the beginning.
Hereafter circulation executes step S14 to step S16, so as to constantly determine battery according to the resistance sequence newly obtained
In the internal resistance value at current time.
A specific embodiment of the detection method of the internal resistance of cell is given in the following table 1, wherein R0=0.007 Ω, resistance
When true value is 0.0081 Ω, in any 9 detections circulation of internal resistance detection, internal resistance measurement value and technical side according to the present invention
The comparison for the resistance value that case determines：
The comparison for the resistance value that 1 internal resistance measurement value of table is determined with technical solution according to the present invention
According to upper table one as it can be seen that passing through the internal resistance measurement value of acquisition battery, resistance sequence is established, is determined according to resistance sequence
The internal resistance value of battery, it is ensured that for the stabilization of data with accurately, obtained internal resistance of cell value can be more nearly the true of resistance
Value, improves the accuracy of internal resistance detection result.
In some optional embodiments of the present invention, the resistance sequence of the initial time is fitted, institute is obtained
Stating the fitting a straight line that the internal resistance of battery is carved at the beginning includes：
Rectangular coordinate system is established, by the abscissa of element position and the rectangular coordinate system in the resistance sequence
It is corresponding, the numerical value of the element is corresponding with the ordinate of the rectangular coordinate system；
Using least square method, the linear equation of the fitting a straight line of N number of element in the resistance sequence is determined.
Specifically, in conjunction with Fig. 2, the resistance sequence of initial time is S1={ R0, R0, R0, R0, R1When, element is in the electricity
Position is followed successively by 1,2,3,4,5 in resistance sequence, in rectangular coordinate system, the corresponding coordinate value difference of each element in resistance sequence
For x=1, y=R0；X=2, y=R0, x=3, y=R0；X=4, y=R0And x=5, y=R1.It can be with using least square method
Fitting a straight line is obtained, linear equation can be y1=a0+a1X can be in the hope of the parameter in linear equation by above-mentioned coordinate value
a0And a1.It is N by the abscissa value of linear equation, the value of corresponding ordinate is determined as what the battery was carved at the beginning
Internal resistance value, that is, as N=5, y1=a0+a1×5。
It should be noted that error between the data and real data that these can be made to acquire using least square method
Quadratic sum is minimum, and the internal resistance of cell value being calculated can be made closer to true value, further increase internal resistance of cell detection
Accuracy.
In some optional embodiments of the invention, step S16 may include：
The resistance sequence at the current time is fitted, the internal resistance for obtaining the battery is straight in the fitting at current time
Line；
Determine the battery in the internal resistance value at current time according to the fitting a straight line.
Specifically, as N=5, the resistance sequence at current time is S1={ R0, R0, R0, R1, R2, it is available after fitting
Fitting a straight line y2=b0+b1X, according to fitting a straight line y2=b0+b1X determines the internal resistance value that battery is carved at the beginning.
Embodiment two
Fig. 4 shows the flow chart of another optional internal resistance of cell detection method according to embodiments of the present invention, this method
Including：
S31 acquires the current internal resistance measurement value R of batterym, wherein current internal resistance measurement value RmIt is collected for the m times
's.By taking m=5 as an example, then current internal resistance measurement value is R5, collected for the 5th.
Specifically, internal resistance of cell measured value R is acquired5Method can with acquisition internal resistance of cell measured value R1Method it is identical,
With specific reference to described in step S11.
S32, by current internal resistance measurement value RmIt is put into last position of the previous resistance sequence including N number of element, and will
The first of the previous resistance sequence is displaced out, to form current resistance sequence.
If m>When N, N number of element of the previous resistance sequence is followed successively by the electricity obtained when the m-N times to the m-1 times acquisition
Pond internal resistance measurement value Rm-NTo Rm-1.With m=5, for N=4,4 elements of previous resistance sequence are followed successively by the 1st time at this time
The internal resistance of cell measured value R obtained when 4 acquisitions1To R4, i.e. S4={ R1, R2, R3, R4, it is formed by current resistance sequence S5=
{R2, R3, R4, R5}。
If when m≤N, the 1st to the N-m+1 element of the previous resistance sequence is internal resistance initial value R0, N-m+2
A element to n-th element is followed successively by the internal resistance of cell measured value R obtained when the 1st time to the m-1 times acquisition1To Rm-1.With m=
For 5, N=7, the 1st of previous resistance sequence to the 3rd element is initial value R at this time0, the 4th element to the 7th element
The 1st time is followed successively by the internal resistance of cell measured value R obtained when the 4th acquisition1To R4, that is, S4={ R0, R0, R0, R1, R2, R3,
R4, it is formed by current resistance sequence S5={ R0, R0, R1, R2, R3, R4, R5}.Herein, initial value R0For basis in laboratory
The internal resistance value of HPPC test method measurement.
Specifically, in the present invention, in order to which the internal resistance for implementing to track battery changes, the internal resistance of battery can constantly be acquired
Measured value is continuously updated resistance sequence according to the internal resistance measurement value of battery.By current internal resistance measurement value RmIt is put into previous electricity
On last position for hindering sequence, and the first of previous resistance sequence is displaced out, forms current resistance sequence.
S33 determines the current internal resistance value of the battery according to the current resistance sequence.
Specifically, the comparison for the resistance value that internal resistance measurement value is determined with technical solution according to the present invention, with specific reference to implementation
In example one, the comparison for the resistance value that one internal resistance measurement value of table is determined with technical solution according to the present invention.Analyzed by table one it is found that
In embodiments of the present invention, by acquisition battery in current internal resistance measurement value Rm；Establish current resistance sequence；According to current
Resistance sequence determines that the battery, can be to wrong data or the biggish data of error in the method for the internal resistance value at current time
With certain resistance, it can guarantee that the stabilization of data with accurately, makes testing result improve electricity closer to the true value of resistance
The accuracy of pond internal resistance detection result.
In a kind of optional embodiment of the present invention, step S33 may include：
The current resistance sequence is fitted, obtains the internal resistance of the battery in current fitting a straight line.
Determine the battery in current internal resistance value according to the fitting a straight line.
Embodiment three
The embodiment of the invention provides a kind of internal resistance of cell detection devices, as shown in figure 5, the device includes：
First acquisition module 40, the internal resistance measurement value R carved at the beginning for acquiring battery1；Referring specifically to embodiment one
In to the detailed description of step S11.
First processing module 41, for establishing the resistance sequence of initial time, the resistance sequence of the initial time includes N
A element, wherein the 1st to the N-1 element is to carve internal resistance initial value R at the beginning0, n-th element is the interior of initial time
Hinder measured value R1, N is the natural number more than or equal to 2；Referring specifically in embodiment one to the detailed description of step S12.
First computing module 42 determines what the battery was carved at the beginning for the resistance sequence according to the initial time
Internal resistance value；Referring specifically in embodiment one to the detailed description of step S13.
In embodiments of the present invention, by the first acquisition module 40, the internal resistance measurement carved at the beginning for acquiring battery
Value R1；First processing module 41, for establishing the resistance sequence of initial time, the resistance sequence of the initial time includes N number of
Element, wherein the 1st to the N-1 element is initial value R0, n-th element is the internal resistance measurement value R of initial time1, N is big
In the natural number for being equal to 2, initial value R0For the internal resistance value measured in laboratory according to HPPC test method；First computing module
42, the internal resistance value that the battery is carved at the beginning is determined for the resistance sequence according to the initial time, it can be to error number
According to or the biggish data of error there is certain resistance, can guarantee the stabilization of data and accurate, make testing result closer to
The true value of resistance improves the accuracy of internal resistance of cell testing result.
In some optional embodiments of the present invention, which further includes：
Third acquisition module, for acquiring battery in the internal resistance measurement value R at current time2；Referring specifically in embodiment one
To the detailed description of step S14.
Third processing module, for by the internal resistance measurement value R at current time2It is put into the last of the resistance sequence of previous moment
On one, and the first of the resistance sequence of previous moment is displaced out, to form the resistance sequence at current time；Referring specifically to reality
It applies in example one to the detailed description of step S15.
Third computing module determines the battery within current time for the resistance sequence according to the current time
Resistance value.Referring specifically in embodiment one to the detailed description of step S16.
In some optional embodiments of the present invention, the first computing module 42 may include：
First fitting unit is fitted for the resistance sequence to the initial time, obtains the internal resistance of the battery
The fitting a straight line carved at the beginning.
First computing unit, for determining internal resistance value that the battery is carved at the beginning according to the fitting a straight line.
In some optional embodiments of the present invention, third computing module may include：
Third fitting unit is fitted for the resistance sequence to the current time, obtains the internal resistance of the battery
In the fitting a straight line at current time；
Third computing unit, for determining the battery in the internal resistance value at current time according to the fitting a straight line.
Example IV
The embodiment of the invention also provides a kind of internal resistance of cell detection devices, as shown in fig. 6, the device includes：
Second acquisition module 50, for acquiring the current internal resistance measurement value R of batterym, wherein current internal resistance measurement value Rm
It is collected for the m times, m is natural number；Referring specifically to embodiment two to the detailed description of step S31.
Second processing module 51, for by current internal resistance measurement value RmIt is put into the previous resistance sequence including N number of element
Last position, and the first of the previous resistance sequence is displaced out, to form current resistance sequence, wherein work as m>When N,
N number of element of the previous resistance sequence is followed successively by the internal resistance of cell measured value R obtained when the m-N times to the m-1 times acquisitionm-N
To Rm-1, wherein N is the natural number more than or equal to 2；Referring specifically in embodiment two to the detailed description of step S32.
Second computing module 52, for determining the current internal resistance value of the battery according to the current resistance sequence；Specifically
Referring in embodiment two to the detailed description of step S33.
In embodiments of the present invention, the second acquisition module 50, for acquiring the current internal resistance measurement value R of batterym, wherein
Current internal resistance measurement value RmIt is collected for the m times, m is natural number；Second processing module 51, for by current internal resistance
Measured value RmIt is put into last position of the previous resistance sequence including N number of element, and by first of the previous resistance sequence
It removes, to form current resistance sequence, wherein work as m>When N, N number of element of the previous resistance sequence is followed successively by the m-N times extremely
The internal resistance of cell measured value R obtained when the m-1 times acquisitionm-NTo Rm-1, wherein N is the natural number more than or equal to 2；Second calculates mould
Block 52 can be to wrong data or error for determining the current internal resistance value of the battery according to the current resistance sequence
Biggish data have certain resistance, can guarantee that the stabilization of data with accurately, makes testing result closer to the true of resistance
Value, improves the accuracy of internal resistance of cell testing result.
In some optional embodiments of the present invention, Second processing module 51 is also used to, as m≤N, the previous electricity
The 1st to the N-m+1 element for hindering sequence is internal resistance initial value R0, the N-m+2 element to n-th element be followed successively by the 1st
The internal resistance of cell measured value R obtained when secondary to the m-1 times acquisition1To Rm-1；Referring specifically in embodiment two to the detailed of step S32
Thin description.
In some optional embodiments of the present invention, the second computing module 52 includes：
Second fitting unit obtains the internal resistance of the battery current for being fitted to the current resistance sequence
Fitting a straight line；
Second computing unit, for determining the battery in current internal resistance value according to the fitting a straight line.
Embodiment five
The embodiment of the invention also provides a kind of electronic equipment, as shown in fig. 7, the electronic equipment may include processor 61
With memory 62, wherein processor 61 can be connected with memory 62 by bus or other modes, to pass through bus in Fig. 7
For connection.
Processor 61 can be central processing unit (Central Processing Unit, CPU).Processor 61 can be with
For other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
The combination of the chips such as discrete hardware components or above-mentioned all kinds of chips.
Memory 62 is used as a kind of non-transient computer readable storage medium, can be used for storing non-transient software program, non-
Transient computer executable program and module, as the display device for mounting on vehicle key screen method in the embodiment of the present invention is corresponding
Program instruction/module (for example, the first acquisition module 40 shown in fig. 5, first processing module 41 and first computing module 42).Place
Non-transient software program, instruction and the module that reason device 61 is stored in memory 62 by operation, thereby executing processor
Various function application and data processing, i.e. internal resistance of cell detection method in realization above method embodiment.
Memory 62 may include storing program area and storage data area, wherein storing program area can storage program area,
Application program required at least one function；It storage data area can the data etc. that are created of storage processor 61.In addition, storage
Device 62 may include high-speed random access memory, can also include non-transient memory, for example, at least a magnetic disk storage
Part, flush memory device or other non-transient solid-state memories.In some embodiments, it includes relative to place that memory 62 is optional
The remotely located memory of device 61 is managed, these remote memories can pass through network connection to processor 61.The reality of above-mentioned network
Example includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
One or more of modules are stored in the memory 62, when being executed by the processor 61, are executed
Internal resistance of cell detection method in embodiment as Figure 1 and Figure 4.
Above-mentioned electronic equipment detail can correspond to refering to fig. 1, in embodiment shown in Fig. 4 corresponding associated description and
Effect is understood that details are not described herein again.
It is that can lead to it will be understood by those skilled in the art that realizing all or part of the process in above-described embodiment method
Computer program is crossed to instruct relevant hardware and complete, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can for magnetic disk,
CD, read-only memory (Read-Only Memory, ROM), random access memory (Random Access
Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk Drive, abbreviation：) or solid state hard disk HDD
(Solid-State Drive, SSD) etc.；The storage medium can also include the combination of the memory of mentioned kind.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where various modifications and variations can be made, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (12)
1. a kind of internal resistance of cell detection method, which is characterized in that including：
The internal resistance measurement value R that acquisition battery is carved at the beginning1；
The resistance sequence of initial time is established, the resistance sequence of the initial time includes N number of element, wherein the 1st to N-1
A element is internal resistance initial value R0, n-th element is the internal resistance measurement value R of initial time1, wherein N is the nature more than or equal to 2
Number；
The internal resistance value that the battery is carved at the beginning is determined according to the resistance sequence of the initial time.
2. the method according to claim 1, wherein the method also includes：
Battery is acquired in the internal resistance measurement value R at current time2；
By the internal resistance measurement value R at current time2It is put on last position of the resistance sequence of previous moment, and by previous moment
The first of resistance sequence is displaced out, to form the resistance sequence at current time；
Determine the battery in the internal resistance value at current time according to the resistance sequence at the current time.
3. the method according to claim 1, wherein the resistance sequence according to the initial time determines the electricity
The internal resistance value that pond is carved at the beginning includes：
The resistance sequence of the initial time is fitted, the fitting a straight line that the internal resistance of the battery is carved at the beginning is obtained；
The internal resistance value that the battery is carved at the beginning is determined according to the fitting a straight line.
4. according to the method described in claim 2, it is characterized in that, the resistance sequence according to the current time determines the electricity
Internal resistance value of the pond at current time include：
The resistance sequence at the current time is fitted, fitting a straight line of the internal resistance at current time of the battery is obtained；
Determine the battery in the internal resistance value at current time according to the fitting a straight line.
5. according to the method described in claim 3, obtaining it is characterized in that, the resistance sequence to the initial time is fitted
The fitting a straight line carved at the beginning to the internal resistance of the battery includes：
Rectangular coordinate system is established, by the abscissa pair of element position and the rectangular coordinate system in the resistance sequence
It answers, the numerical value of the element is corresponding with the ordinate of the rectangular coordinate system；
Using least square method, the linear equation of the fitting a straight line of N number of element in the resistance sequence is determined.
6. a kind of internal resistance of cell detection method, which is characterized in that including：
Acquire the current internal resistance measurement value R of batterym, wherein current internal resistance measurement value RmIt is collected for the m times, m is certainly
So number；
By current internal resistance measurement value RmIt is put into last position of the previous resistance sequence including N number of element, and by the previous electricity
The first of resistance sequence is displaced out, to form current resistance sequence, wherein work as m>When N, N number of element of the previous resistance sequence
It is followed successively by the internal resistance of cell measured value R obtained when the m-N times to the m-1 times acquisitionm-NTo Rm-1, wherein N is oneself more than or equal to 2
So number；
The current internal resistance value of the battery is determined according to the current resistance sequence.
7. according to the method described in claim 6, it is characterized in that, as m≤N, the 1st to of the previous resistance sequence
N-m+1 element is internal resistance initial value R0, the N-m+2 element to n-th element be followed successively by the 1st time to when the m-1 times acquisition
The internal resistance of cell measured value R of acquisition1To Rm-1。
8. according to the method described in claim 6, it is characterized in that, determining working as the battery according to the current resistance sequence
Preceding internal resistance value, including：
The current resistance sequence is fitted, obtains the internal resistance of the battery in current fitting a straight line；
Determine the battery in current internal resistance value according to the fitting a straight line.
9. a kind of internal resistance of cell detection device, which is characterized in that including：
First acquisition module, the internal resistance measurement value R carved at the beginning for acquiring battery1；
First processing module, for establishing the resistance sequence of initial time, the resistance sequence of the initial time includes N number of member
Element, wherein the 1st to the N-1 element is internal resistance initial value R0, n-th element is the internal resistance measurement value R of initial time1,
In, N is the natural number more than or equal to 2；
First computing module determines the internal resistance that the battery is carved at the beginning for the resistance sequence according to the initial time
Value.
10. a kind of internal resistance of cell detection device, which is characterized in that including：
Second acquisition module, for acquiring the current internal resistance measurement value R of batterym, wherein current internal resistance measurement value RmFor m
Secondary to collect, m is natural number；
Second processing module, for by current internal resistance measurement value RmIt is put into last of the previous resistance sequence including N number of element
Position, and the first of the previous resistance sequence is displaced out, to form current resistance sequence, wherein work as m>It is described previous when N
N number of element of resistance sequence is followed successively by the internal resistance of cell measured value R obtained when the m-N times to the m-1 times acquisitionm-NTo Rm-1,
Middle N is the natural number more than or equal to 2；
Third computing module, for determining the current internal resistance value of the battery according to the current resistance sequence.
11. a kind of electronic equipment, which is characterized in that including：
Memory and processor communicate with each other connection, are stored in the memory between the memory and the processor
Computer instruction, the processor is by executing the computer instruction, thereby executing electricity described in any one of claims 1-8
Pond internal resistance detection method.
12. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
It enables, the computer instruction is used to that the computer perform claim to be made to require any internal resistance of cell detection method in 1-8.
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