CN109061486A - A kind of method and system of determining constant-current charge stop time point - Google Patents
A kind of method and system of determining constant-current charge stop time point Download PDFInfo
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Abstract
The embodiment of the invention provides a kind of method and systems of determining constant-current charge stop time point, which comprises obtains the current value of charging current, and generates current sequence；Sequence of differences is calculated by current sequence；The current value variation degree of each time point is calculated by sequence of differences；Current break quantity series are generated according to the current value variation degree of preset length of window time and each time point；Constant current end exponential sequence is generated according to current break quantity series；Calculate the constant current end index maximum value in the exponential sequence of constant current end；Corrected parameter is fluctuated by preset constant current and constant current end index maximum value calculation goes out multiple alternative constant-current charge stop time points, and establishes set using multiple alternative constant-current charge stop time points；Maximum value is found out in set, and using maximum value as constant-current charge stop time point.The automation for realizing determining constant-current charge stop time point, improves the efficiency analyzed power battery charging data.
Description
Technical field
The present invention relates to rechargeable battery technical fields, more particularly to a kind of method of determining constant-current charge stop time point
With a kind of system of determining constant-current charge stop time point.
Background technique
As electric car is universal in development in recent years, the association large-scale production and deployment of power battery.Lithium from
Energy carrier of the sub- power battery as electric car has when carrying out energy supplement to it with traditional fuel-engined vehicle completely
Different modes.
Under normal circumstances, it is divided into two ranks of constant-current charge and constant-voltage charge for the charging process of lithium-ion-power cell
Section, and have different characterizations between information caused by two stages, so it has different break-up values, for dynamic
In the analysis of power battery charge data, how to identify that the critical point (i.e. constant current cut off) in two stages is very but to be also substantially
Very important work.
It is in constant-current phase in charging process, the problems such as due to equipment or operation, actual charging current might not
It is completely constant, it is more likely that there is the case where electric current is temporarily raised and lowered, meanwhile, because of common lithium ion power electricity
Pond there will necessarily be the internal resistance of cell, so the unstable of electric current also results in the unstable of voltage, cut so that voltage be made to reach in advance
To condition, the judgement of constant current cut off is finally made to generate deviation, above situation is the atypia situation in data analysis.
And in the analysis of existing data, atypia situation can only can be speculated by the way of artificial observation,
And determine constant current cut off, this just cause existing analysis mode cannot achieve automation to power battery charging data into
Row analysis, it is extremely low so as to cause the analysis efficiency for power battery charging data.
Summary of the invention
In view of the above problems, it proposes the embodiment of the present invention and overcomes the above problem or at least partly in order to provide one kind
When a kind of method of the determining constant-current charge stop time point to solve the above problems and a kind of corresponding determining constant-current charge cut-off
Between the system put.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of method of determining constant-current charge stop time point,
The method applies to the charging process of power battery, and the charging process has corresponding charging current, which comprises
The current value of the charging current is obtained, and generates current sequence；
Sequence of differences is calculated by the current sequence；
The current value variation degree of each time point is calculated by the sequence of differences；
According to the preset length of window time, and, the current value variation degree of each time point generates current break
Quantity series；
Constant current end exponential sequence is generated according to the current break quantity series；
Calculate the constant current end index maximum value in the exponential sequence of the constant current end；
Corrected parameter is fluctuated by preset constant current, and, the constant current end index maximum value calculation goes out multiple alternative perseverances
Current charge stop time point, and set is established using the multiple alternative constant-current charge stop time point；
Maximum value is found out in the set, and using the maximum value as constant-current charge stop time point.
Preferably, the current value for obtaining the charging current, and the step of generating current sequence includes:
Multiple current values are successively obtained by preset multiple time points；Wherein, the multiple current value and it is the multiple when
Between put correspond；
Using multiple time points, and, current sequence is generated with its one-to-one the multiple current value.
Preferably, described the step of calculating sequence of differences by the current sequence, includes:
Using current value corresponding with each time point in the current sequence, and, the previous time with the time point
The corresponding current value of point, calculates multiple current differentials；
Using the multiple current differential setting value sequence.
Preferably, the step of current value variation degree that each time point is calculated by sequence of differences packet
It includes:
Whether it is greater than the electric current that preset threshold determines each time point by the current differential judged in the sequence of differences
It is worth variation degree.
Preferably, constant current fluctuation corrected parameter levels off to 1.
The embodiment of the invention also discloses a kind of system of determining constant-current charge stop time point, the system applies to move
The charging process of power battery, the charging process have corresponding charging current, the system comprises:
Current sequence generation module for obtaining the current value of the charging current, and generates current sequence；
Sequence of differences computing module, for calculating sequence of differences by the current sequence；
Current value variation degree computing module, the current value for calculating each time point by the sequence of differences become
Change degree；
Current break quantity series generation module was used for according to the preset length of window time, and, each time point
Current value variation degree generate current break quantity series；
Constant current end exponential sequence generation module, for generating constant current end index according to the current break quantity series
Sequence；
Constant current end index maximum value calculation module, for calculating the constant current end in the exponential sequence of the constant current end
Index maximum value；
Set establishes module, is used to fluctuate corrected parameter by preset constant current, and, constant current end index is most
Big value calculates multiple alternative constant-current charge stop time points, and is established using the multiple alternative constant-current charge stop time point
Set；
Constant-current charge stop time point determining module, for finding out maximum value in the set, and by the maximum value
As constant-current charge stop time point.
Preferably, the current sequence generation module includes:
Current value acquisition submodule, for successively obtaining multiple current values by preset multiple time points；Wherein, described more
A current value and the multiple time point correspond；
Current sequence generates submodule, is used to use multiple time points, and, with its one-to-one the multiple current value
Generate current sequence.
Preferably, the sequence of differences computing module includes:
Current differential computational submodule is used for using current value corresponding with each time point in the current sequence, and,
Current value corresponding with the previous time point at the time point, calculates multiple current differentials；
Sequence of differences generates submodule, for using the multiple current differential setting value sequence.
Preferably, the current value variation degree computing module includes:
Current value variation degree determines submodule, for by judging whether the current differential in the sequence of differences is greater than
Preset threshold determines the current value variation degree of each time point.
Preferably, constant current fluctuation corrected parameter levels off to 1.
The embodiment of the present invention, the charging current that can be got by power battery charging system are used in practical applications
Current value generate current sequence, sequence of differences is calculated by current sequence, each time point is calculated by sequence of differences
Current value variation degree, it is prominent that electric current is generated according to the current value variation degree of preset length of window time and each time point
Become quantity series, generates constant current end exponential sequence according to current break quantity series, calculate in the exponential sequence of constant current end
Constant current end index maximum value, by preset constant current fluctuate corrected parameter, and, constant current end index maximum value calculation go out it is more
A constant-current charge stop time point, and set is established using multiple constant-current charge stop time points, maximum value is found out in set,
And using maximum value as constant-current charge stop time point, to realize the automation of determining constant-current charge stop time point, greatly
The efficiency analyzed power battery charging data is improved greatly.
Furthermore, it is understood that during the embodiment of the present invention can also pick out power battery charging automatically
Detailed description of the invention
Fig. 1 is a kind of step flow chart of the embodiment of the method for determining constant-current charge stop time point of the invention；
Fig. 2 is a kind of structural block diagram of the system embodiment of determining constant-current charge stop time point of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to Fig.1, the step of showing a kind of embodiment of the method for determining constant-current charge stop time point of the invention stream
Cheng Tu can specifically include following steps:
Step 101, the current value of the charging current is obtained, and generates current sequence；
In practical applications, the embodiment of the present invention can be applied in the charging system of power battery, for example, mobile terminal
Charging system, charging system of electric car etc..
In embodiments of the present invention, multiple current values successively first can be obtained by preset multiple time points, then using more
A time point, and, current sequence is generated with its one-to-one multiple current value.
In the concrete realization, the embodiment of the present invention can set up n time point under required any time length,
And the current value of multiple charging currents is successively obtained according to the n period set up, wherein multiple current values and it is the multiple when
Between put correspond, specifically, current sequence I={ i1,i2,i3,...,inSequence footmark be corresponding time point, wherein
Time point 1 is charging start time, and time point n is charging finishing time.
Step 102, sequence of differences is calculated by the current sequence；
In embodiments of the present invention, current value corresponding with each time point in current sequence can be used, and, when with this
Between the corresponding current value of previous time point put, calculate multiple current differentials, then use multiple current differential setting value sequences
Column.
In the concrete realization, the embodiment of the present invention can be according to formula d1=0；The sequence of calculation
The difference of the electric current at the previous time point at middle each time point and the time point, obtains current differential sequence D={ d1,d2,
d3,...,dn}。
Step 103, the current value variation degree of each time point is calculated by the sequence of differences；
In embodiments of the present invention, whether preset threshold can be greater than by the current differential judged in the sequence of differences
To determine the current value variation degree of each time point.
In the concrete realization, the embodiment of the present invention can according to battery charge characteristic, setting electric current change threshold △, according to
Formula bk=0,Calculate the current break sequence B={ b for indicating current value variation degree1,b2,
b3,...,bn}。
In practical applications, the embodiment of the present invention can judge that the electric current is caused to generate change by current value variation degree
The reason of change, specifically, if current differential be greater than preset threshold, the curent change be by the drop flow phenomenon in constant-voltage charge,
Or, caused by electric current wild effect in constant-current charge, if current differential is less than preset threshold, the curent change be by
Caused by the random perturbation phenomenon of electric current.
Step 104, according to the preset length of window time, and, the current value variation degree of each time point generates
Current break quantity series；
In the concrete realization, the embodiment of the present invention can be t with the preset length of window time, according to formulaIt calculates and generates current break quantity series C={ c1,c2,c3,...,cn}。
Step 105, constant current end exponential sequence is generated according to the current break quantity series；
In the concrete realization, the embodiment of the present invention can be according to formulaIt calculates and generates constant current end index sequence
Arrange E={ e1,e2,e3,...,en}。
Step 106, the constant current end index maximum value in the exponential sequence of the constant current end is calculated；
In the concrete realization, the embodiment of the present invention can acquire constant current end index maximum value by calculating in sequence E
emax。
Step 107, corrected parameter is fluctuated by preset constant current, and, the constant current end index maximum value calculation goes out more
A alternative constant-current charge stop time point, and set is established using the multiple alternative constant-current charge stop time point；
In the concrete realization, the embodiment of the present invention can preset constant current fluctuation corrected parameter λ, and according to formula ek≥
emaxMeet all elements E' of condition in × λ selection sequence E, then with the subscript of all elements in E' alternately constant-current charge
Stop time point establishes the set K being made of whole alternative constant-current charge stop time points.
In a preferred embodiment of the invention, constant current fluctuation corrected parameter λ can be preset and level off to 1.
Step 108, maximum value is found out in the set, and using the maximum value as constant-current charge stop time point.
In the concrete realization, the embodiment of the present invention can obtain maximum value max (K) from set K and cut as constant-current charge
Only time point.
In order to enable those skilled in the art to better understand the present invention, a complete example is given below to the technology of the present invention side
Case is illustrated:
Certainly, above-mentioned example is only as an example, those skilled in the art can also use other modes according to the actual situation
Pass through the current value of charging current, current sequence, sequence of differences, current value variation degree, length of window time, current break number
Measure sequence, constant current end exponential sequence, constant current end index maximum value, constant current fluctuation corrected parameter, the cut-off of alternative constant-current charge
Time point, and, set etc. with multiple alternative constant-current charge stop time points is any one or more to determine that constant current is filled
Electric stop time point, the comparison embodiment of the present invention are not construed as limiting.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according to
According to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implemented
Necessary to example.
The embodiment of the present invention, the charging current that can be got by power battery charging system are used in practical applications
Current value generate current sequence, sequence of differences is calculated by current sequence, each time point is calculated by sequence of differences
Current value variation degree, it is prominent that electric current is generated according to the current value variation degree of preset length of window time and each time point
Become quantity series, generates constant current end exponential sequence according to current break quantity series, calculate in the exponential sequence of constant current end
Constant current end index maximum value, by preset constant current fluctuate corrected parameter, and, constant current end index maximum value calculation go out it is more
A constant-current charge stop time point, and set is established using multiple constant-current charge stop time points, maximum value is found out in set,
And using maximum value as constant-current charge stop time point, to realize the automation of determining constant-current charge stop time point, greatly
The efficiency analyzed power battery charging data is improved greatly.
Referring to Fig. 2, a kind of structural frames of the system embodiment of determining constant-current charge stop time point of the invention are shown
Figure, can specifically include following module:
Current sequence generation module 201 for obtaining the current value of the charging current, and generates current sequence；
Sequence of differences computing module 202, for calculating sequence of differences by the current sequence；
Current value variation degree computing module 203, for calculating the electric current of each time point by the sequence of differences
It is worth variation degree；
Current break quantity series generation module 204 was used for according to the preset length of window time, and, when described each
Between the current value variation degree put generate current break quantity series；
Constant current end exponential sequence generation module 205, for generating constant current end according to the current break quantity series
Exponential sequence；
Constant current end index maximum value calculation module 206, for calculating the constant current in the exponential sequence of the constant current end
End index maximum value；
Set establishes module 207, is used to fluctuate corrected parameter by preset constant current, and, the constant current end refers to
Number maximum value calculation goes out multiple alternative constant-current charge stop time points, and uses the multiple alternative constant-current charge stop time point
Establish set；
Constant-current charge stop time point determining module 208, for finding out maximum value in the set, and by the maximum
Value is used as constant-current charge stop time point.
In a preferred embodiment of the invention, the current sequence generation module 201 can also include following submodule:
Current value acquisition submodule, for successively obtaining multiple current values by preset multiple time points；Wherein, described more
A current value and the multiple time point correspond；
Current sequence generates submodule, is used to use multiple time points, and, with its one-to-one the multiple current value
Generate current sequence.
In a preferred embodiment of the invention, the sequence of differences computing module 202 can also include following submodule
Include:
Current differential computational submodule is used for using current value corresponding with each time point in the current sequence, and,
Current value corresponding with the previous time point at the time point, calculates multiple current differentials；
Sequence of differences generates submodule, for using the multiple current differential setting value sequence.
In a preferred embodiment of the invention, the current value variation degree computing module 203 can also include as follows
Submodule:
Current value variation degree determines submodule, for by judging whether the current differential in the sequence of differences is greater than
Preset threshold determines the current value variation degree of each time point.
Current value variation degree calculates, and constant current fluctuation corrected parameter levels off to 1.
The embodiment of the present invention, the charging current that can be got by power battery charging system are used in practical applications
Current value generate current sequence, sequence of differences is calculated by current sequence, each time point is calculated by sequence of differences
Current value variation degree, it is prominent that electric current is generated according to the current value variation degree of preset length of window time and each time point
Become quantity series, generates constant current end exponential sequence according to current break quantity series, calculate in the exponential sequence of constant current end
Constant current end index maximum value, by preset constant current fluctuate corrected parameter, and, constant current end index maximum value calculation go out it is more
A constant-current charge stop time point, and set is established using multiple constant-current charge stop time points, maximum value is found out in set,
And using maximum value as constant-current charge stop time point, to realize the automation of determining constant-current charge stop time point, greatly
The efficiency analyzed power battery charging data is improved greatly.
For system embodiments, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, system or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The system of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of instruction system is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
The method and a kind of determining constant current of a kind of determining constant-current charge stop time point provided by the present invention are filled above
The system of electric stop time point, is described in detail, and specific case used herein is to the principle of the present invention and embodiment party
Formula is expounded, and the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile it is right
In those of ordinary skill in the art, according to the thought of the present invention, change is had in specific embodiments and applications
Place, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of method of determining constant-current charge stop time point, which is characterized in that the method applies to filling for power battery
Electric process, the charging process have corresponding charging current, which comprises
The current value of the charging current is obtained, and generates current sequence；
Sequence of differences is calculated by the current sequence；
The current value variation degree of each time point is calculated by the sequence of differences；
According to the preset length of window time, and, the current value variation degree of each time point generates current break quantity
Sequence；
Constant current end exponential sequence is generated according to the current break quantity series；
Calculate the constant current end index maximum value in the exponential sequence of the constant current end；
Corrected parameter is fluctuated by preset constant current, and, the constant current end index maximum value calculation goes out multiple alternative constant currents and fills
Electric stop time point, and set is established using the multiple alternative constant-current charge stop time point；
Maximum value is found out in the set, and using the maximum value as constant-current charge stop time point.
2. the method according to claim 1, wherein the current value for obtaining the charging current, and generating
The step of current sequence includes:
Multiple current values are successively obtained by preset multiple time points；Wherein, the multiple current value and the multiple time point
It corresponds；
Using multiple time points, and, current sequence is generated with its one-to-one the multiple current value.
3. the method according to claim 1, wherein described calculate sequence of differences by the current sequence
Step includes:
Using current value corresponding with each time point in the current sequence, and, the previous time point pair with the time point
The current value answered calculates multiple current differentials；
Using the multiple current differential setting value sequence.
4. the method according to claim 1, wherein described calculate each time point by the sequence of differences
Current value variation degree the step of include:
Determine that the current value of each time point becomes by the way that whether the current differential judged in the sequence of differences is greater than preset threshold
Change degree.
5. the method according to claim 1, wherein constant current fluctuation corrected parameter levels off to 1.
6. a kind of system of determining constant-current charge stop time point, which is characterized in that the system applies to filling for power battery
Electric process, the charging process have corresponding charging current, the system comprises:
Current sequence generation module for obtaining the current value of the charging current, and generates current sequence；
Sequence of differences computing module, for calculating sequence of differences by the current sequence；
Current value variation degree computing module, the current value for calculating each time point by the sequence of differences change journey
Degree；
Current break quantity series generation module was used for according to the preset length of window time, and, the electricity of each time point
Flow valuve variation degree generates current break quantity series；
Constant current end exponential sequence generation module, for generating constant current end index sequence according to the current break quantity series
Column；
Constant current end index maximum value calculation module, for calculating the constant current end index in the exponential sequence of the constant current end
Maximum value；
Set establishes module, is used to fluctuate corrected parameter by preset constant current, and, the constant current end index maximum value
Multiple alternative constant-current charge stop time points are calculated, and collection is established using the multiple alternative constant-current charge stop time point
It closes；
Constant-current charge stop time point determining module, for finding out maximum value in the set, and using the maximum value as
Constant-current charge stop time point.
7. system according to claim 6, which is characterized in that the current sequence generation module includes:
Current value acquisition submodule, for successively obtaining multiple current values by preset multiple time points；Wherein, the multiple electricity
Flow valuve and the multiple time point correspond；
Current sequence generates submodule, is used to use multiple time points, and, it is generated with its one-to-one the multiple current value
Current sequence.
8. system according to claim 6, which is characterized in that the sequence of differences computing module includes:
Current differential computational submodule is used for using current value corresponding with each time point in the current sequence, and, with institute
The corresponding current value of previous time point for stating time point, calculates multiple current differentials；
Sequence of differences generates submodule, for using the multiple current differential setting value sequence.
9. system according to claim 6, which is characterized in that the current value variation degree computing module includes:
Current value variation degree determines submodule, for that whether the current differential by judging in the sequence of differences is greater than to be default
Threshold value determines the current value variation degree of each time point.
10. system according to claim 6, which is characterized in that constant current fluctuation corrected parameter levels off to 1.
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| CN103794828A (en) * | 2012-10-30 | 2014-05-14 | 上海中科智能控制技术有限公司 | Method and device for rapid charging of lithium ion battery |
| CN102944849A (en) * | 2012-11-27 | 2013-02-27 | 天津力神电池股份有限公司 | Rapid battery capacity detecting method for lithium ion batteries |
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