CN107247237A - A kind of detection method of battery, electronic equipment and computer-readable recording medium - Google Patents
A kind of detection method of battery, electronic equipment and computer-readable recording medium Download PDFInfo
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- CN107247237A CN107247237A CN201710383162.1A CN201710383162A CN107247237A CN 107247237 A CN107247237 A CN 107247237A CN 201710383162 A CN201710383162 A CN 201710383162A CN 107247237 A CN107247237 A CN 107247237A
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
Abstract
The invention discloses a kind of detection method of battery, electronic equipment and computer-readable recording medium.Wherein, the battery bag contains N number of battery core；N is the integer more than or equal to 1；Method includes：For each battery core, in M charge and discharge cycles cycle, it is determined that first parameter in each charge and discharge cycles cycle；The first parameter characterization electric discharge window；M is the integer more than or equal to 2；Using M the first parameters, the first coefficient of the first linear function is adjusted so that the curve that the first linear function pair is answered meets the distribution of first centrostigma, and determines the second parameter；First point set includes the M points formed by the first parameter and corresponding cycle period；The second parameter characterization degree of fitting；Using the first coefficient and the second parameter, with reference to inspection policies, judge battery core with the presence or absence of circulation risk.
Description
Technical field
The present invention relates to detection technique, more particularly to a kind of detection method of battery, electronic equipment and computer-readable deposit
Storage media.
Background technology
Battery (such as lithium battery) is in digital product such as notebook, mobile phone and tablet personal computer (pad), power vehicle and energy storage
Using extensive on the products such as power station or mega project, but the aging of battery or rapid decay as user the problem of complain
One of.And how to judge the battery core later stage in advance and there may be the problem of rapid decay or diving as industry.
The content of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of detection method of battery, electronic equipment
And computer-readable recording medium.
What the technical scheme of the embodiment of the present invention was realized in：
The embodiments of the invention provide a kind of detection method of battery, the battery bag contains N number of battery core；N is to be more than or wait
In 1 integer；Methods described includes：
For each battery core, in M charge and discharge cycles cycle, it is determined that first parameter in each charge and discharge cycles cycle；
The first parameter characterization electric discharge window；M is the integer more than or equal to 2；
Using M the first parameters, the first coefficient of the first linear function is adjusted so that what the first linear function pair was answered
Curve meets the distribution of first centrostigma, and determines the second parameter；First point set comprising M by the first parameter and correspondingly
Cycle period formation point；The second parameter characterization degree of fitting；
Using the first coefficient and the second parameter, with reference to inspection policies, judge battery core with the presence or absence of circulation risk.
It is described in M charge and discharge cycles cycle in such scheme, it is determined that first ginseng in each charge and discharge cycles cycle
Number, including：
In each charge and discharge cycles cycle, under collection battery core the first open-circuit voltage in the first state and the second state
Second open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Described in second state representation
The electricity of battery is less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
It is described to utilize the first coefficient and the second parameter in such scheme, with reference to inspection policies, judge that battery core whether there is and follow
Ring risk, including：
Second parameter is squared, obtain the 3rd parameter；
When the 3rd parameter is less than or equal to second value more than the first value, and the second parameter, determines that battery core is present and follow
Ring risk.
It is described to utilize the first coefficient and the second parameter in such scheme, with reference to inspection policies, judge that battery core whether there is and follow
Ring risk, including：
Second parameter is squared, obtain the 3rd parameter；
It is another in second parameter and N number of battery core when the 3rd parameter is more than the 3rd value and is worth less than or equal to first
When the difference of second parameter of one battery core is beyond the 4th value, it is determined that there is circulation risk in correspondence battery core.
It is described to utilize the first coefficient and the second parameter in such scheme, with reference to inspection policies, judge that battery core whether there is and follow
Ring risk, including：
Second parameter is squared, obtain the 3rd parameter；
It is another in second parameter and N number of battery core when the 3rd parameter is more than the 5th value and is worth less than or equal to the 3rd
When the difference of second parameter of one battery core is beyond the 6th value, it is determined that there is circulation risk in correspondence battery core.
In such scheme, N is the integer more than or equal to 2；N number of battery core has the first series parallel structure；Described
There are at least two cascaded structures and at least two parallel-connection structures in one series parallel structure；The collection battery core is in the second condition
Before second open-circuit voltage, methods described also includes：
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure
In the presence of at least two cascaded structures and a parallel-connection structure.
The embodiment of the present invention additionally provides a kind of electronic equipment, including：
Battery, the battery bag contains N number of battery core；N is the integer more than or equal to 1；
Processor, for for each battery core, in M charge and discharge cycles cycle, it is determined that each charge and discharge cycles cycle
The first parameter；The first parameter characterization electric discharge window；M is the integer more than or equal to 2；Utilize M the first parameters, adjustment
First coefficient of the first linear function so that the curve that the first linear function pair is answered meets the distribution of first centrostigma,
And determine the second parameter；First point set includes the M points formed by the first parameter and corresponding cycle period；Described second
Parameter characterization degree of fitting；And the first coefficient and the second parameter are utilized, with reference to inspection policies, judge that battery core whether there is circulated air
Danger.
In such scheme, the processor, specifically for：
In each charge and discharge cycles cycle, under collection battery core the first open-circuit voltage in the first state and the second state
Second open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Described in second state representation
The electricity of battery is less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
In such scheme, the processor, specifically for：
Second parameter is squared, obtain the 3rd parameter；When the 3rd parameter is more than the first value, and the second parameter
During less than or equal to second value, determine that battery core has circulation risk；
Or, second parameter is squared, obtain the 3rd parameter；When the 3rd parameter is more than the 3rd value and is less than
Or be worth equal to first, when the difference of second parameter and the second parameter of another battery core in N number of battery core exceeds the 4th value, really
Surely correspond to battery core and there is circulation risk；
Or, second parameter is squared, obtain the 3rd parameter；When the 3rd parameter is more than the 5th value and is less than
Or be worth equal to the 3rd, when the difference of second parameter and the second parameter of another battery core in N number of battery core exceeds the 6th value, really
Surely correspond to battery core and there is circulation risk.
In such scheme, N is the integer more than or equal to 2；N number of battery core has the first series parallel structure；Described
There are at least two cascaded structures and at least two parallel-connection structures in one series parallel structure；The processor, is additionally operable to：
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure
In the presence of at least two cascaded structures and a parallel-connection structure.
The embodiment of the present invention additionally provides a kind of computer-readable recording medium, is stored thereon with computer program, described
The step of above method being realized when computer program is executed by processor.
Detection method, electronic equipment and the computer-readable recording medium of battery provided in an embodiment of the present invention, for every
Individual battery core, in M charge and discharge cycles cycle, it is determined that first parameter in each charge and discharge cycles cycle；First parameter list
Levy electric discharge window；M is the integer more than or equal to 2；Using M the first parameters, the first coefficient of the first linear function is adjusted, is made
The distribution for curve first centrostigma of satisfaction that the first linear function pair is answered is obtained, and determines the second parameter；Described first point
Collection includes the M points formed by the first parameter and corresponding cycle period；The second parameter characterization degree of fitting；It is using first
Number and the second parameter, with reference to inspection policies, judge that battery core, with the presence or absence of circulation risk, passes through window and the cycle period progress of discharging
Linear fit, judges that battery core, with the presence or absence of circulation risk, so, it is possible quickly and accurately to judge using degree of fitting and slope
The health status of battery core.
Brief description of the drawings
In accompanying drawing (it is not necessarily drawn to scale), similar reference phase described in different views
As part.Similar reference numerals with different letter suffix can represent the different examples of similar component.Accompanying drawing is with example
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is the detection method schematic flow sheet of the battery of the embodiment of the present invention one；
Fig. 2 is a kind of battery structure schematic diagram of the embodiment of the present invention；
Fig. 3 is second of battery structure schematic diagram of the embodiment of the present invention；
Fig. 4 is the third battery structure schematic diagram of the embodiment of the present invention；
Fig. 5 is the 4th kind of battery structure schematic diagram of the embodiment of the present invention；
Fig. 6 is the detection method schematic flow sheet of the battery of the embodiment of the present invention two；
Fig. 7 is the electronic devices structure schematic diagram of the embodiment of the present invention three.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Judge that the battery core later stage has rapid decay or the scheme of diving and mainly had at present：Observe circulation volume conservation rate scheme
And AC impedance tracking scheme.
Wherein, for observation circulation volume conservation rate scheme, this is a kind of method of results-driven, when the capacity of battery
When decaying to some value, it is determined as battery end of life, so this scheme was difficult in the effective time, makes the dry of improvement
In advance.
AC impedance tracking scheme is a kind of very coarse method, only when battery capacity rapid attenuation, is only possible to see
To some faint signals, and judge possible inaccurate.So this scheme is also approximately a kind of results-driven method.
On the other hand, using activation polarization parameter model, by observing the static open-circuit voltage after the completion of discharge and recharge, recognize
It is the true discharge condition of reflection, i.e., the embodiment of true state-of-charge (SOC) to know static open-circuit voltage, it is proposed that true electric discharge electricity
Pressure, that is, the concept for the window (Window) that discharges.Electric discharge window is done related to SOC, it is known that window is wider, and SOC is higher, belongs to base
The discharge characteristic curve (Chem-ID) of plinth.All electrochemical phenomenas, including multiplying power, high temperature performance and cycle performance can be with
Confirmed by Chem-ID.
For cyclic process, with the aging of battery core, impedance increase, final resting potential can be increasingly after corresponding charging
It is low, and the final resting potential more and more higher after discharging, so electric discharge windows narrow, capability retention can then be reduced.And pass through
Research is found：By observing the electric discharge window of early stage (such as preceding 150 cycle periods), it can be found that the later stage (the such as the 400th~
800 cycle periods, or even thousands of circulation) (circulation volume conservation rate rapid attenuation to the threshold value set (can be with for circulation diving
Be interpreted as the specification of setting, such as be set close to 0%)) battery core its discharge window and cycle period have preferably linear close
System.Take out battery core Linear Quasi is right and slope K, it is found that there is marked difference in they and normal battery core.Accordingly can be quick
Diagnose the health status of battery core.
Based on this, in various embodiments of the present invention：For each battery core, in M charge and discharge cycles cycle, it is determined that
First parameter in each charge and discharge cycles cycle；The first parameter characterization electric discharge window；M is the integer more than or equal to 2；Profit
With M the first parameters, the first coefficient of the first linear function is adjusted so that the curve that the first linear function pair is answered meets the
The distribution of some centrostigmas, and determine the second parameter；First point set is comprising M by the first parameter and corresponding cycle period
The point of formation；The second parameter characterization degree of fitting；Using the first coefficient and the second parameter, with reference to inspection policies, battery core is judged
With the presence or absence of circulation risk.
In the embodiment of the present invention, by discharging, window and cycle period carry out linear fit, using degree of fitting and slope come
Judge that battery core, with the presence or absence of circulation risk, so, it is possible quickly and accurately to judge the health status of battery core, that is, after whether there is
The risk of phase circulation diving, so as to make interference to battery in time, improves the service life of battery.
Embodiment one
The embodiment of the present invention provides a kind of detection method of battery, and methods described is applied in electronic equipment.
Wherein, the battery bag contains N number of battery core；N is the integer more than or equal to 1.
Here, during practical application, the battery can be lithium battery.
The electronic equipment can be notebook, pad, mobile phone etc..
Fig. 1 is the implementation process schematic diagram of the battery detection method of the embodiment of the present invention one, as shown in figure 1, this method includes
Following steps：
Step 101：For each battery core, in M charge and discharge cycles cycle, it is determined that the of each charge and discharge cycles cycle
One parameter；
Here, the first parameter characterization electric discharge window；M is the integer more than or equal to 2.
During practical application, M can be arranged as required to, such as be set to 40,50 or 60 etc..Count for convenience, can be with
It is set to 50.
The M charge and discharge cycles cycle refers to：Cycle-index is M.
It can be seen that to obtain the first parameter, it is necessary to which to gather battery fully charged and discharged from the definition of electric discharge window
Into the open-circuit voltage of two states.
Based on this, in one embodiment, implementing for step 101 can include：
In each charge and discharge cycles cycle, under collection battery core the first open-circuit voltage in the first state and the second state
Second open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Described in second state representation
The electricity of battery is less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
Here, the first state characterize the battery electricity reach Second Threshold, i.e. battery fill with electricity or
Reach a certain threshold value.The electricity of battery is finished less than or equal to first threshold, i.e. battery discharge described in second state representation.
Wherein, during practical application, the Second Threshold can be set as needed, such as the electricity of described battery reaches
Two threshold values characterize the electricity saturation of the battery, or, for the protection to battery core, the electricity saturation of battery is not made, but reach
To some specific threshold value.
, can in order to gather the open-circuit voltage under the first open-circuit voltage and the second state under first state during practical application
To set first threshold, the power supply of electronic equipment when capacity reaches first threshold after battery discharge by firmware (Firmware)
It can switch, so that electronic equipment is closed.
Complete to charge to discharge off during this, when the electricity of battery reaches Second Threshold, battery management system
System (BMS, Battery Management System) can record the static open circuit electricity of each battery core under static condition after the flow
Pressure.When discharge capacity of the cell reaches first threshold, BMS can equally record the static open circuit electricity of each battery core under inactive state
Pressure.
In order to take uniformity a little, to ensure the reliability of result, it can set quiet after completely filling by Firmware
Only the time is disposed as some with the quiescent time after electric discharge and fixes duration, and such as 5~60min is so, quiet when fully charged after
Put duration to reach after this fixation duration, BMS can record open-circuit voltage, when standing duration reaches this fixation after discharge off
After length, BMS can record corresponding open-circuit voltage.
In addition, the requirement in order to meet standing, when battery, which charges to electricity, reaches Second Threshold, BMS needs to cut off outer
Portion's power supply, so that standing duration reaches that this fixes duration；Correspondingly, it is up to when needing automatic shutdown after battery discharge is finished
This is fixed and can not charged in duration after to the fixed duration, or insertion power supply adaptor.
So, electric discharge window refer to after the final static OCP after charging and electric discharge final static OCP it
Difference.
The open-circuit voltage refers to：Terminal voltage of the battery under open-circuit condition.The open-circuit voltage of battery is equal to battery disconnected
During road (during without electric current by the two poles of the earth) electrode potential of the anode electrode potential of battery and negative pole difference.
The scheme of the embodiment of the present invention, goes for the battery (as shown in Figure 2) of single battery core or the single simultaneously battery core of many strings.
For the battery of the single simultaneously battery core of many strings, in other words, N (being more than or equal to 2), individual battery core had many string lists and structure, this structure
In, there is at least two cascaded structures and a parallel-connection structure.
So, during practical application, the battery core of many batteries is probably many simultaneously structures of many strings, as shown in Fig. 3 to 5.Namely
Say, N number of battery core has the first series parallel structure；There are at least two cascaded structures and at least two in first series parallel structure
Parallel-connection structure.In this case, it is necessary to will go here and there many by the switch (generally field-effect transistor (FET)) in structure more and tie
Structure is converted into the single simultaneously structure of many strings, to gather the voltage and identical electric current of each battery core independence.The now electricity of each battery core
Stream is the same, can exclude the influence of test electric current.
Here, in Fig. 2 to 5, C represents different battery cores, and A represents ammeter, and V represents voltmeter, L representation switch.
Based on this, in one embodiment, N number of battery core has the first series parallel structure；First series parallel structure
In the presence of at least two cascaded structures and at least two parallel-connection structures；The second open-circuit voltage of the collection battery core in the second condition
Before, this method can also include：
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure
In the presence of at least two cascaded structures and a parallel-connection structure.
Step 102：Using M the first parameters, the first coefficient of the first linear function is adjusted so that the first linear letter
The corresponding curve of number meets the distribution of first centrostigma, and determines the second parameter；
First point set includes the M points formed by the first parameter and corresponding cycle period.
The second parameter characterization degree of fitting.
In other words, cycle-index, using electric discharge window as Y-axis, is utilized into M the first parameters and circulation time as X-axis
Number carries out linear fit so that obtained linear function and the difference (least square meaning) of the first point set is minimum, so as to obtain
Degree of fitting R2And slope K.
Step 103：Using the first coefficient and the second parameter, with reference to inspection policies, judge battery core with the presence or absence of circulation risk.
Here, the judgement battery core refers to the presence or absence of circulation risk：The battery core is in the charge and discharge cycles in later stage
It is no exist rapid decay or circulation diving (circulation volume conservation rate rapid attenuation to set threshold value (can be understood as setting
0%) specification, such as be set close to) risk.
When judging that battery core has circulation risk, controller (such as embedded controller (EC) etc.) can be allowed according to existing
Intervention Strategy, interference (such as reducing operating voltage etc. of battery) is made to battery, so as to the use longevity of effective extension battery
Life.
During practical application, often carry out after M charge and discharge cycles, step 101~103 are carried out, to judge whether battery core deposits
In circulation risk, in fitting, cycle period refers to the actual cycle-index of battery, for example for, it is assumed that every 50 are followed
In the ring cycle, it is performed both by step 101~103, then in the 51st~100 cycle period, the cycle period used during fitting
It is 51~100, subsequently by that analogy.
The detection method of battery provided in an embodiment of the present invention, for each battery core, in M charge and discharge cycles cycle,
It is determined that first parameter in each charge and discharge cycles cycle；The first parameter characterization electric discharge window；M is whole more than or equal to 2
Number；Using M the first parameters, the first coefficient of the first linear function is adjusted so that the curve that the first linear function pair is answered
The distribution of first centrostigma is met, and determines the second parameter；First point set is comprising M is by the first parameter and corresponding follows
The point of ring period-producer；The second parameter characterization degree of fitting；Using the first coefficient and the second parameter, with reference to inspection policies, sentence
Core is powered off with the presence or absence of circulation risk, window and cycle period carry out linear fit by discharging, using degree of fitting and slope come
Judge that battery core, with the presence or absence of circulation risk, so, it is possible quickly and accurately to judge the health status of battery core, so as to timely
Interference is made on ground to battery, improves the service life of battery.
Embodiment two
The embodiment of the present invention provides a kind of detection method of battery, and methods described is applied in electronic equipment.
Wherein, the battery bag contains N number of battery core；N is the integer more than or equal to 1.
Here, during practical application, the battery can be lithium battery.
The electronic equipment can be notebook, pad, mobile phone etc..
Fig. 6 is the implementation process schematic diagram of the battery detection method of the embodiment of the present invention two, as shown in fig. 6, this method includes
Following steps：
Step 601：For each battery core, in M charge and discharge cycles cycle, it is determined that the of each charge and discharge cycles cycle
One parameter；
Here, the first parameter characterization electric discharge window；M is the integer more than or equal to 2.
During practical application, M can be arranged as required to, such as be set to 40,50 or 60 etc..Count for convenience, can be with
It is set to 50.
The M charge and discharge cycles cycle refers to：Cycle-index is M.
It can be seen that to obtain the first parameter, it is necessary to which to gather battery fully charged and discharged from the definition of electric discharge window
Into the open-circuit voltage of two states.
Based on this, in one embodiment, implementing for step 601 can include：
In each charge and discharge cycles cycle, under collection battery core the first open-circuit voltage in the first state and the second state
Second open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Described in second state representation
The electricity of battery is less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
Here, the first state characterize the battery electricity reach Second Threshold, i.e. battery fill with electricity or
Reach a certain threshold value.The electricity of battery is finished less than or equal to first threshold, i.e. battery discharge described in second state representation.
Wherein, during practical application, the Second Threshold can be set as needed, such as the electricity of described battery reaches
Two threshold values characterize the electricity saturation of the battery, or, for the protection to battery core, the electricity saturation of battery is not made, but reach
To some specific threshold value.
, can in order to gather the open-circuit voltage under the first open-circuit voltage and the second state under first state during practical application
To set first threshold by Firmware, when capacity reaches first threshold after battery discharge, the power supply of electronic equipment can be cut
Change, so that electronic equipment is closed.
Complete to charge to discharge off during this, when the electricity of battery reaches Second Threshold, BMS can record this
After flow under static condition each battery core static open-circuit voltage.When discharge capacity of the cell reaches first threshold, BMS can equally remember
Record the static open-circuit voltage of each battery core under inactive state.
In order to take uniformity a little, to ensure the reliability of result, it can set quiet after completely filling by Firmware
Only the time is disposed as some with the quiescent time after electric discharge and fixes duration, and such as 5~60min is so, quiet when fully charged after
Put duration to reach after this fixation duration, BMS can record open-circuit voltage, when standing duration reaches this fixation after discharge off
After length, BMS can record corresponding open-circuit voltage.
In addition, the requirement in order to meet standing, when battery, which charges to electricity, reaches Second Threshold, BMS needs to cut off outer
Portion's power supply, so that standing duration reaches that this fixes duration；Correspondingly, it is up to when needing automatic shutdown after battery discharge is finished
This is fixed and can not charged in duration after to the fixed duration, or insertion power supply adaptor.
So, electric discharge window refer to after the final static OCP after charging and electric discharge final static OCP it
Difference.
The open-circuit voltage refers to：Terminal voltage of the battery under open-circuit condition.The open-circuit voltage of battery is equal to battery disconnected
During road (during without electric current by the two poles of the earth) electrode potential of the anode electrode potential of battery and negative pole difference.
The scheme of the embodiment of the present invention, goes for the battery (as shown in Figure 2) of single battery core or the single simultaneously battery core of many strings.
For the battery of the single simultaneously battery core of many strings, in other words, N (being more than or equal to 2), individual battery core had many string lists and structure, this structure
In, there is at least two cascaded structures and a parallel-connection structure.
So, during practical application, the battery core of many batteries is probably many simultaneously structures of many strings, as shown in Fig. 3 to 5.Namely
Say, N number of battery core has the first series parallel structure；There are at least two cascaded structures and at least two in first series parallel structure
Parallel-connection structure.In this case, it is necessary to by switch in structure (generally FET) will many strings are more and structures to be converted into many strings single
And structure, to gather the voltage and identical electric current of each battery core independence.Now the electric current of each battery core is the same, can exclude
Test the influence of electric current.
Here, in Fig. 2 to 5, C represents different battery cores, and A represents ammeter, and V represents voltmeter, L representation switch.
Based on this, in one embodiment, N number of battery core has the first series parallel structure；First series parallel structure
In the presence of at least two cascaded structures and at least two parallel-connection structures；The second open-circuit voltage of the collection battery core in the second condition
Before, this method can also include：
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure
In the presence of at least two cascaded structures and a parallel-connection structure.
Step 602：Using M the first parameters, the first coefficient of the first linear function is adjusted so that the first linear letter
The corresponding curve of number meets the distribution of first centrostigma, and determines the second parameter；
First point set includes the M points formed by the first parameter and corresponding cycle period.
The second parameter characterization degree of fitting.
In other words, cycle-index, using electric discharge window as Y-axis, is utilized into M the first parameters and circulation time as X-axis
Number carries out linear fit so that obtained linear function and the difference (least square meaning) of the first point set is minimum, so as to obtain
Degree of fitting R2And slope K.
Step 603：Second parameter is squared, obtain the 3rd parameter；And utilize the 3rd parameter and the second parameter, knot
Inspection policies are closed, judge battery core with the presence or absence of circulation risk.
Specifically, when the 3rd parameter is less than or equal to second value more than the first value, and the second parameter, battery core is determined
In the presence of circulation risk.
Here, this determination mode is applied to the situation of single battery core and many battery cores, that is to say, that when N is more than or equal to 1
When, for each battery core, when the 3rd parameter is less than or equal to second value more than the first value, and the second parameter, it is determined that electric
There is circulation risk in core.
It is another in second parameter and N number of battery core when the 3rd parameter is more than the 3rd value and is worth less than or equal to first
When the difference of second parameter of one battery core is beyond the 4th value, it is determined that there is circulation risk in correspondence battery core.
Here, this determination mode is applied to the situation of many battery cores, that is to say, that when N is more than or equal to 2, for every
Individual battery core, when the 3rd parameter be more than the 3rd value and less than or equal to first value, second parameter with it is another in N number of battery core
When the difference of second parameter of individual battery core is beyond the 4th value, it is determined that there is circulation risk in correspondence battery core.
It is another in second parameter and N number of battery core when the 3rd parameter is more than the 5th value and is worth less than or equal to the 3rd
When the difference of second parameter of one battery core is beyond the 6th value, it is determined that there is circulation risk in correspondence battery core.
Here, here, this determination mode is applied to the situation of many battery cores, that is to say, that right when N is more than or equal to 2
In each battery core, when the 3rd parameter is more than the 5th value and is less than or equal in the 3rd value, second parameter and N number of battery core
When the difference of second parameter of another battery core is beyond the 6th value, it is determined that there is circulation risk in correspondence battery core.
When these above-mentioned conditions are all unsatisfactory for, illustrate that the battery core is also healthier.
During practical application, first value, second value, the 3rd value, the 4th value, the 5th value and the 6th value can pass through statistics
Method is set, or can also be provided by empirical value.
For example for, by the above method, the first value, second value, the 3rd value, the 5th value can be set to be respectively：
0.5、0、0.3、0.2。
Here, the judgement battery core refers to the presence or absence of circulation risk：The battery core is in the charge and discharge cycles in later stage
It is no exist rapid decay or circulation diving (circulation volume conservation rate rapid attenuation to set threshold value (can be understood as setting
0%) specification, such as be set close to) risk.
When battery core has circulation risk, controller (such as EC etc.) can be allowed according to existing Intervention Strategy, to battery
Interference (such as reducing operating voltage of battery etc.) is made, effectively to extend the service life of battery.
During practical application, often carry out after M charge and discharge cycles, step 601~603 are carried out, to judge whether battery core deposits
In circulation risk, in fitting, cycle period refers to the actual cycle-index of battery, for example for, it is assumed that every 50 are followed
In the ring cycle, it is performed both by step 601~603, then in the 51st~100 cycle period, the cycle period used during fitting
It is 51~100, subsequently by that analogy.
By taking the battery structure shown in Fig. 2 as an example, it is assumed that every 50 cycle periods, which are done, once to be judged, the first value, second value,
Three values, the 5th value are respectively：0.5、0、0.3、0.2.
The battery has three battery cores, respectively C1, C2, C3.In each cyclic process, if tri- battery cores of C1, C2, C3
Electric discharge window be respectively：
Window1=OCVfc1-OCVdc1；
Window2=OCVfc2-OCVdc2；
Window3=OCVfc3-OCVdc3；
Wherein, OCVfc represents static open-circuit voltage that is fully charged rear or being charged to some threshold value, and OCVdc represents electric discharge
Static open-circuit voltage after finishing.
Using Window as Y-axis, period Cycle is X-axis.Finish 50 times circulation after, take 0~50 time circulation Window with
Correspondence number of times (1~50) does linear fit, can obtain degree of fitting R2 and slope K.Assuming that the fitting of tri- battery cores of C1, C2, C3
Degree is respectively R21、R22、R23, slope is respectively K1, K2, K3.
So for each battery core, make following judgement：
1st, as the R of battery core2>0.5 and K<0, then judge that the battery core has remanent life risk；
2 or the 0.3 of battery core<R2≤ 0.5, and the K difference of the K of the battery core and other battery cores is obvious, such as, it is assumed that right
In C1, | K1-K2 |>Threshold1 (the 4th value), then can be determined that as C1 there is remanent life risk；
3 or the 0.2 of battery core<R2≤0.3, and the K difference of the K of the battery core and other battery cores is obvious, such as, it is assumed that right
In C1, | K1-K2 |>Threshold2 (the 6th value), then can be determined that as C1 there is remanent life risk；
4th, when above-mentioned condition is all unsatisfactory for, illustrates battery core follow-up life-span also health, observe follow-up circulation.
Finish after 100 circulations, take the Window of 51~100 circulations to do linear fit with corresponding number of times (51~100),
Degree of fitting R2 and slope K can be obtained.Assuming that the degree of fitting of tri- battery cores of C1, C2, C3 is respectively R21、R22、R23, slope difference
For K1, K2, K3.
So for each battery core, make the judgement as above, to judge that battery core whether there is remanent life risk.
Below by that analogy.
It should be noted that：When battery is single core strueture, still it can judge that battery core whether there is in the above described manner
Remanent life risk, so unlike：When judging whether remanent life risk, the first above-mentioned condition can only be used
To judge, i.e., the R when battery core2>0.5 and K<0, then judge that the battery core has remanent life risk.
Current battery has some interference measures, since extend battery life, and these interference measures be all it is fixed, than
Such as after cycle-index reaches 100 times, the operating voltage of battery is reduced, cycle-index reduces battery again after reaching 300 times again
Operating voltage.In this case, when using scheme provided in an embodiment of the present invention, corresponding to not up to interference measure
, can be in advance using these interference measures when cycle-index is detected by battery subsequently in the presence of circulation risk；Certainly, when reaching
When battery is still not detected by during cycle-index corresponding to interference measure subsequently there is circulation risk, it can postpone and use these
Interference measure.
The detection method of battery provided in an embodiment of the present invention, for each battery core, in M charge and discharge cycles cycle,
It is determined that first parameter in each charge and discharge cycles cycle；The first parameter characterization electric discharge window；M is whole more than or equal to 2
Number；Using M the first parameters, the first coefficient of the first linear function is adjusted so that the curve that the first linear function pair is answered
The distribution of first centrostigma is met, and determines the second parameter；First point set is comprising M is by the first parameter and corresponding follows
The point of ring period-producer；The second parameter characterization degree of fitting；Second parameter is squared, obtain the 3rd parameter；And profit
With the 3rd parameter and the second parameter, with reference to inspection policies, judge that battery core, with the presence or absence of circulation risk, passes through window and the circulation of discharging
Cycle carries out linear fit, judges that battery core, with the presence or absence of circulation risk, so, it is possible quick, standard using degree of fitting and slope
Really judge the health status of battery core, so as to make interference to battery in time, improve the service life of battery.
Embodiment three
Based on the detection method of above-mentioned battery, the embodiment of the present invention additionally provides a kind of electronic equipment, as shown in fig. 7, should
Electronic equipment includes：
Battery 71, the battery bag contains N number of battery core；N is the integer more than or equal to 1；
Processor 72, for for each battery core, in M charge and discharge cycles cycle, it is determined that each charge and discharge cycles week
The first parameter of phase；The first parameter characterization electric discharge window；M is the integer more than or equal to 2；Using M the first parameters, adjust
First coefficient of whole first linear function so that the curve that the first linear function pair is answered meets minute of first o'clock centrostigma
Cloth, and determine the second parameter；First point set includes the M points formed by the first parameter and corresponding cycle period；It is described
Second parameter characterization degree of fitting；And the first coefficient and the second parameter are utilized, with reference to inspection policies, judge that battery core whether there is and follow
Ring risk.
In one embodiment, the processor 72, specifically for：
In each charge and discharge cycles cycle, under collection battery core the first open-circuit voltage in the first state and the second state
Second open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Described in second state representation
The electricity of battery is less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
In one embodiment, the processor 72, specifically for：
Second parameter is squared, obtain the 3rd parameter；When the 3rd parameter is more than the first value, and the second parameter
During less than or equal to second value, determine that battery core has circulation risk.
Wherein, when the 3rd parameter is more than the 3rd value and less than or equal to the first value, second parameter and N number of battery core
In another battery core the second parameter difference beyond the 4th value when, the processor 72 determines that correspondence battery core has circulated air
Danger；
It is another in second parameter and N number of battery core when the 3rd parameter is more than the 5th value and is worth less than or equal to the 3rd
When the difference of second parameter of one battery core is beyond the 6th value, the processor 72 determines that correspondence battery core has circulation risk.
In one embodiment, N is the integer more than or equal to 2；N number of battery core has the first series parallel structure；It is described
There are at least two cascaded structures and at least two parallel-connection structures in the first series parallel structure；The processor 72, is additionally operable to：
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure
In the presence of at least two cascaded structures and a parallel-connection structure.
It will be appreciated by those skilled in the art that each part in electronic equipment shown in Fig. 7 realize that function can refer to before
State the associated description of the detection method of battery and understand.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text means relevant with embodiment
During special characteristic, structure or characteristic are included at least one embodiment of the present invention.Therefore, occur everywhere in entire disclosure
" in one embodiment " or " in one embodiment " identical embodiment is not necessarily referred to.In addition, these specific feature, knots
Structure or characteristic can be combined in one or more embodiments in any suitable manner.It should be understood that in the various implementations of the present invention
In example, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be with its work(
It can be determined with internal logic, any limit is constituted without tackling the implementation process of the embodiment of the present invention.The embodiments of the present invention
Sequence number is for illustration only, and the quality of embodiment is not represented.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property is included, so that process, method, article or device including a series of key elements not only include those key elements, and
And also including other key elements being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Also there is other identical element in process, method, article or the device of key element.
, can be by it in several embodiments provided herein, it should be understood that disclosed apparatus and method
Its mode is realized.Apparatus embodiments described above are only schematical, for example, the division of the unit, is only
A kind of division of logic function, can have other dividing mode, such as when actually realizing：Multiple units or component can be combined, or
Another system is desirably integrated into, or some features can be ignored, or do not perform.In addition, shown or discussed each composition portion
Coupling point each other or direct-coupling or communication connection can be the INDIRECT COUPLINGs of equipment or unit by some interfaces
Or communication connection, can be electrical, machinery or other forms.
The above-mentioned unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location；Both a place can be located at, multiple network lists can also be distributed to
In member；Part or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit, also may be used
Be each unit individually as a unit, can also two or more units it is integrated in a unit；It is above-mentioned
Integrated unit can both 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.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in computer read/write memory medium, and the program exists
During execution, the step of execution includes above method embodiment；And foregoing storage medium includes：Movable storage device, read-only deposit
Reservoir (ROM, Read Only Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
Or, if the above-mentioned integrated unit of the present invention is realized using in the form of software function module and is used as independent product
Sale in use, can also be stored in a computer read/write memory medium.Understood based on such, the present invention is implemented
The part that the technical scheme of example substantially contributes to prior art in other words can be embodied in the form of software product,
The computer software product is stored in a storage medium, including some instructions are to cause a computer equipment (can be with
It is personal computer, server or network equipment etc.) perform all or part of each of the invention embodiment methods described.
And foregoing storage medium includes：Movable storage device, ROM, magnetic disc or CD etc. are various can be with Jie of store program codes
Matter.
Based on this, the embodiment of the present invention additionally provides a kind of computer-readable recording medium, is stored thereon with computer journey
Sequence, when the computer program is run by processor, is performed：
For each battery core of battery, in M charge and discharge cycles cycle, it is determined that the first of each charge and discharge cycles cycle
Parameter；The first parameter characterization electric discharge window；The battery bag contains N number of battery core；N is the integer more than or equal to 1；M is big
In or equal to 2 integer；
Using M the first parameters, the first coefficient of the first linear function is adjusted so that what the first linear function pair was answered
Curve meets the distribution of first centrostigma, and determines the second parameter；First point set comprising M by the first parameter and correspondingly
Cycle period formation point；The second parameter characterization degree of fitting；
Using the first coefficient and the second parameter, with reference to inspection policies, judge battery core with the presence or absence of circulation risk.
In one embodiment, when the computer program is run by processor, perform：
In each charge and discharge cycles cycle, under collection battery core the first open-circuit voltage in the first state and the second state
Second open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Described in second state representation
The electricity of battery is less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
In one embodiment, when the computer program is run by processor, perform：
Second parameter is squared, obtain the 3rd parameter；
When the 3rd parameter is less than or equal to second value more than the first value, and the second parameter, determines that battery core is present and follow
Ring risk.
In one embodiment, when the computer program is run by processor, perform：
Second parameter is squared, obtain the 3rd parameter；
It is another in second parameter and N number of battery core when the 3rd parameter is more than the 3rd value and is worth less than or equal to first
When the difference of second parameter of one battery core is beyond the 4th value, it is determined that there is circulation risk in correspondence battery core.
In one embodiment, when the computer program is run by processor, perform：
Second parameter is squared, obtain the 3rd parameter；
It is another in second parameter and N number of battery core when the 3rd parameter is more than the 5th value and is worth less than or equal to the 3rd
When the difference of second parameter of one battery core is beyond the 6th value, it is determined that there is circulation risk in correspondence battery core.
In one embodiment, when the computer program is run by processor, also perform：
Before the second open-circuit voltage of the collection battery core in the second condition, when the electricity of the battery is less than or equal to
During first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure
In the presence of at least two cascaded structures and a parallel-connection structure；Wherein,
N is the integer more than or equal to 2；N number of battery core has the first series parallel structure；First series parallel structure
In the presence of at least two cascaded structures and at least two parallel-connection structures.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (11)
1. a kind of detection method of battery, the battery bag contains N number of battery core；N is the integer more than or equal to 1；Methods described bag
Include：
For each battery core, in M charge and discharge cycles cycle, it is determined that first parameter in each charge and discharge cycles cycle；It is described
First parameter characterization electric discharge window；M is the integer more than or equal to 2；
Using M the first parameters, the first coefficient of the first linear function is adjusted so that the curve that the first linear function pair is answered
The distribution of first centrostigma is met, and determines the second parameter；First point set is comprising M is by the first parameter and corresponding follows
The point of ring period-producer；The second parameter characterization degree of fitting；
Using the first coefficient and the second parameter, with reference to inspection policies, judge battery core with the presence or absence of circulation risk.
2. according to the method described in claim 1, it is characterised in that described in M charge and discharge cycles cycle, it is determined that each filling
First parameter in discharge cycles cycle, including：
In each charge and discharge cycles cycle, second under collection battery core the first open-circuit voltage in the first state and the second state
Open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Battery described in second state representation
Electricity be less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
3. according to the method described in claim 1, it is characterised in that described to utilize the first coefficient and the second parameter, with reference to detection
Strategy, judges battery core with the presence or absence of circulation risk, including：
Second parameter is squared, obtain the 3rd parameter；
When the 3rd parameter is less than or equal to second value more than the first value, and the second parameter, determine that battery core has circulated air
Danger.
4. according to the method described in claim 1, it is characterised in that described to utilize the first coefficient and the second parameter, with reference to detection
Strategy, judges battery core with the presence or absence of circulation risk, including：
Second parameter is squared, obtain the 3rd parameter；
When the 3rd parameter is more than the 3rd value and less than or equal to the first value, second parameter and another in N number of battery core
When the difference of second parameter of battery core is beyond the 4th value, it is determined that there is circulation risk in correspondence battery core.
5. according to the method described in claim 1, it is characterised in that described to utilize the first coefficient and the second parameter, with reference to detection
Strategy, judges battery core with the presence or absence of circulation risk, including：
Second parameter is squared, obtain the 3rd parameter；
When the 3rd parameter is more than the 5th value and less than or equal to the 3rd value, second parameter and another in N number of battery core
When the difference of second parameter of battery core is beyond the 6th value, it is determined that there is circulation risk in correspondence battery core.
6. method according to claim 2, it is characterised in that N is the integer more than or equal to 2；N number of battery core has
First series parallel structure；There are at least two cascaded structures and at least two parallel-connection structures in first series parallel structure；It is described
Gather before the second open-circuit voltage of battery core in the second condition, methods described also includes：
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure is present
At least two cascaded structures and a parallel-connection structure.
7. a kind of electronic equipment, including：
Battery, the battery bag contains N number of battery core；N is the integer more than or equal to 1；
Processor, for for each battery core, in M charge and discharge cycles cycle, it is determined that the of each charge and discharge cycles cycle
One parameter；The first parameter characterization electric discharge window；M is the integer more than or equal to 2；Utilize M the first parameters, adjustment first
First coefficient of linear function so that the curve that the first linear function pair is answered meets the distribution of first centrostigma, and really
Fixed second parameter；First point set includes the M points formed by the first parameter and corresponding cycle period；Second parameter
Characterize degree of fitting；And the first coefficient and the second parameter are utilized, with reference to inspection policies, judge battery core with the presence or absence of circulation risk.
8. electronic equipment according to claim 7, it is characterised in that the processor, specifically for：
In each charge and discharge cycles cycle, second under collection battery core the first open-circuit voltage in the first state and the second state
Open-circuit voltage；The electricity that the first state characterizes the battery reaches Second Threshold；Battery described in second state representation
Electricity be less than or equal to first threshold；The Second Threshold is more than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, first parameter is obtained.
9. electronic equipment according to claim 7, it is characterised in that the processor, specifically for：
Second parameter is squared, obtain the 3rd parameter；It is worth when the 3rd parameter is more than first, and the second parameter is less than
During equal to second value, determine that battery core has circulation risk；
Or, second parameter is squared, obtain the 3rd parameter；When the 3rd parameter is more than the 3rd value and is less than or waits
In the first value, when the difference of second parameter and the second parameter of another battery core in N number of battery core exceeds the 4th value, it is determined that pair
Battery core is answered to there is circulation risk；
Or, second parameter is squared, obtain the 3rd parameter；When the 3rd parameter is more than the 5th value and is less than or waits
In the 3rd value, when the difference of second parameter and the second parameter of another battery core in N number of battery core exceeds the 6th value, it is determined that pair
Battery core is answered to there is circulation risk.
10. electronic equipment according to claim 9, it is characterised in that N is the integer more than or equal to 2；N number of electricity
Core has the first series parallel structure；There are at least two cascaded structures and at least two and be coupled in first series parallel structure
Structure；The processor, is additionally operable to：
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, the second series parallel structure of N number of battery core formation is controlled；Second series parallel structure is present
At least two cascaded structures and a parallel-connection structure.
11. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the computer program
The step of any one of claim 1 to 6 methods described is realized when being executed by processor.
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