CN107247237B - A kind of detection method of battery, electronic equipment and computer readable storage medium - Google Patents
A kind of detection method of battery, electronic equipment and computer readable storage medium Download PDFInfo
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- CN107247237B CN107247237B CN201710383162.1A CN201710383162A CN107247237B CN 107247237 B CN107247237 B CN 107247237B CN 201710383162 A CN201710383162 A CN 201710383162A CN 107247237 B CN107247237 B CN 107247237B
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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 storage mediums.Wherein, the battery includes N number of battery core；N is the integer more than or equal to 1；Method includes: in M charge and discharge cycles period, to determine first parameter in each charge and discharge cycles period for each battery core；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 corresponding curve of first linear function 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；Judge battery core with the presence or absence of circulation risk in conjunction with inspection policies using the first coefficient and the second parameter.
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 technique
Battery (such as lithium battery) is in digital product such as notebook, mobile phone and tablet computer (pad), power vehicle and energy storage
The products such as power station perhaps on mega project using extensively but the aging of battery or rapid decay become the problem of user complains
One of.And how to judge that the battery core later period, there may be the problems that rapid decay or diving become industry in advance.
Summary 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 storage medium.
The technical solution of the embodiment of the present invention is achieved in that
The embodiment of the invention provides a kind of detection method of battery, the battery includes N number of battery core；N is to be greater than or wait
In 1 integer；The described method includes:
For each battery core, in M charge and discharge cycles period, first parameter in each charge and discharge cycles period is determined；
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 first linear function is corresponding
Curve meets the distribution of first centrostigma, and determines the second parameter；First point set includes M by the first parameter and correspondence
Cycle period formed point；The second parameter characterization degree of fitting；
Judge battery core with the presence or absence of circulation risk in conjunction with inspection policies using the first coefficient and the second parameter.
It is described in M charge and discharge cycles period in above scheme, determine first ginseng in each charge and discharge cycles period
Number, comprising:
In each charge and discharge cycles period, acquire under 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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
It is described to utilize the first coefficient and the second parameter in above scheme, in conjunction with inspection policies, judges that battery core whether there is and follow
Ring risk, comprising:
Second parameter is squared, obtain third parameter；
When the third parameter is greater than the first value, and the second parameter is less than or equal to second value, determines that battery core exists and follow
Ring risk.
It is described to utilize the first coefficient and the second parameter in above scheme, in conjunction with inspection policies, judges that battery core whether there is and follow
Ring risk, comprising:
Second parameter is squared, obtain third parameter；
It is another in second parameter and N number of battery core when the third parameter is greater than third value and is less than or equal to the first value
When the difference of second parameter of one battery core exceeds four values, determine that corresponding battery core has circulation risk.
It is described to utilize the first coefficient and the second parameter in above scheme, in conjunction with inspection policies, judges that battery core whether there is and follow
Ring risk, comprising:
Second parameter is squared, obtain third parameter；
It is another in second parameter and N number of battery core when the third parameter is greater than the 5th value and is less than or equal to third value
When the difference of second parameter of one battery core exceeds six values, determine that corresponding battery core has circulation risk.
In above scheme, N is the integer more than or equal to 2；N number of battery core has the first series and parallel structure；Described
There are at least two cascaded structures and at least two parallel-connection structures for one series and parallel structure；The acquisition battery core is in the second condition
Before second open-circuit voltage, the method 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, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure
There are at least two cascaded structures and a parallel-connection structures.
The embodiment of the invention also provides a kind of electronic equipment, comprising:
Battery, the battery include N number of battery core；N is the integer more than or equal to 1；
Processor, for determining each charge and discharge cycles period in M charge and discharge cycles period for each battery core
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 corresponding curve of first linear function 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, in conjunction with inspection policies, judge battery core with the presence or absence of circulated air
Danger.
In above scheme, the processor is specifically used for:
In each charge and discharge cycles period, acquire under 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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
In above scheme, the processor is specifically used for:
Second parameter is squared, obtain third parameter；When the third parameter is greater than the first value, and the second parameter
When less than or equal to second value, determine that battery core has circulation risk；
Alternatively, second parameter is squared, obtain third parameter；When the third parameter is greater than third value and is less than
Or it is equal to the first value, when the difference of the second parameter of another battery core exceeds four values in second parameter and N number of battery core, really
Surely it corresponds to battery core and there is circulation risk；
Alternatively, second parameter is squared, obtain third parameter；When the third parameter is greater than the 5th value and is less than
Or it is equal to third value, when the difference of the second parameter of another battery core exceeds six values in second parameter and N number of battery core, really
Surely it corresponds to battery core and there is circulation risk.
In above scheme, N is the integer more than or equal to 2；N number of battery core has the first series and parallel structure；Described
There are at least two cascaded structures and at least two parallel-connection structures for one series and parallel structure；The processor, is also used to:
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure
There are at least two cascaded structures and a parallel-connection structures.
The embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, described
The step of above method is realized when computer program is executed by processor.
Detection method, electronic equipment and the computer readable storage medium of battery provided in an embodiment of the present invention, for every
A battery core determines first parameter in each charge and discharge cycles period in M charge and discharge cycles period；First parameter list
Sign 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
It obtains the corresponding curve of first linear function and meets the distribution of first centrostigma, and determine the second parameter；Described first point
The point that collection is formed comprising M by the first parameter and corresponding cycle period；The second parameter characterization degree of fitting；Utilize the first system
Several and the second parameter judges that battery core with the presence or absence of circulation risk, is carried out by electric discharge window and cycle period in conjunction with inspection policies
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.
Detailed description of the invention
In attached drawing (it is not necessarily drawn to scale), similar appended drawing reference can describe phase in different views
As component.Similar reference numerals with different letter suffix can indicate the different examples of similar component.Attached drawing with example and
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is the detection method flow diagram of one battery of the embodiment of the present invention；
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 flow diagram of two battery of the embodiment of the present invention；
Fig. 7 is three electronic devices structure schematic diagram of the embodiment of the present invention.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Judge that the battery core later period, there are rapid decays or the scheme of diving mainly to have at present: observation circulation volume conservation rate scheme
And AC impedance tracking scheme.
Wherein, for observing 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 likely to see
To some faint signals, and determining may inaccuracy.So this scheme is also approximately a kind of results-driven method.
On the other hand, recognized using activation polarization parameter model by the static open-circuit voltage after the completion of observation charge and discharge
Knowing static open-circuit voltage is the true discharge condition of reflection, i.e., the embodiment of true state-of-charge (SOC) proposes true electric discharge electricity
Pressure, the i.e. concept of electric discharge window (Window).The window that will discharge does 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 increases, and final resting potential can be increasingly after corresponding charging
It is low, and the final resting potential after discharging is higher and higher, so electric discharge windows narrow, capacity retention ratio can then reduce.And pass through
Research is found: the electric discharge window by observing early period (such as preceding 150 cycle periods), it can be found that the later period (such as the 400th~
800 cycle periods or even thousands of circulation) (threshold value of circulation volume conservation rate rapid attenuation to setting (can be with for circulation diving
Be interpreted as the specification of setting, for example be set to close to 0%)) battery core its discharge window and cycle period have preferable linear close
System.Take out battery core Linear Quasi is right and slope K, it is found that there are marked differences with normal battery core for they.It accordingly can be quick
Diagnose the health status of battery core.
Based on this, in various embodiments of the present invention: being directed to each battery core, in M charge and discharge cycles period, determine
First parameter in each charge and discharge cycles period；The first parameter characterization electric discharge window；M is the integer more than or equal to 2；Benefit
With M the first parameters, the first coefficient of the first linear function is adjusted, so that the corresponding curve of first linear function meets the
The distribution of some centrostigmas, and determine the second parameter；First point set includes M by the first parameter and corresponding cycle period
The point of formation；The second parameter characterization degree of fitting；Battery core is judged in conjunction with inspection policies using the first coefficient and the second parameter
With the presence or absence of circulation risk.
In the embodiment of the present invention, by electric discharge 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 the health status for quickly and accurately judging battery core, that is, after whether there is
The phase risk of circulation diving improves the service life of battery so as to make interference to battery in time.
Embodiment one
The embodiment of the present invention provides a kind of detection method of battery, and the method is applied in electronic equipment.
Wherein, the battery includes N number of battery core；N is the integer more than or equal to 1.
Here, when 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 one battery detection method of the embodiment of the present invention, as shown in Figure 1, this method includes
Following steps:
Step 101: being directed to each battery core, in M charge and discharge cycles period, determine the of each charge and discharge cycles period
One parameter；
Here, the first parameter characterization electric discharge window；M is the integer more than or equal to 2.
When practical application, M can according to need setting, for example be set as 40,50 or 60 etc..It, can be in order to facilitate statistics
It is set as 50.
The M charge and discharge cycles period refers to: cycle-index M.
It can be seen that the first parameter in order to obtain from the definition of electric discharge window, it is fully charged and discharged to need to acquire battery
At the open-circuit voltage of two states.
Based on this, in one embodiment, the specific implementation of step 101 may include:
In each charge and discharge cycles period, acquire under 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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
Here, the electricity that the first state characterizes the battery reaches second threshold, i.e., battery fill with electricity or
Reach a certain threshold value.The electricity of battery described in second state representation is less than or equal to first threshold, i.e. battery discharge finishes.
Wherein, when practical application, the second threshold be can be set as needed, for example the electricity of the battery reaches
Two threshold values characterize the electricity saturation of the battery, alternatively, being saturated the electricity of battery for the protection to battery core, but reaching
To some specific threshold value.
It, can in order to acquire the first open-circuit voltage under first state and the open-circuit voltage under the second state when practical application
First threshold, the power supply of electronic equipment when capacity reaches first threshold after battery discharge is arranged by firmware (Firmware)
It can switch, so that electronic equipment is closed.
Complete charge to discharge off this during, when the electricity of battery reaches second threshold, battery management system
System (BMS, Battery Management System) will record the static open circuit electricity of each battery core under static condition after the process
Pressure.When discharge capacity of the cell reaches first threshold, BMS equally will record the static open circuit electricity of each battery core under stationary state
Pressure.
In order to take consistency a little, to guarantee the reliability of result, can be arranged by Firmware quiet after completely filling
Only the quiescent time after time and electric discharge is disposed as some and fixes duration, such as 5~60min, in this way, quiet when fully charged after
It sets duration to reach after this fixes duration, BMS will record open-circuit voltage, and duration is stood after discharge off when reaching this fixation
After length, BMS will record corresponding open-circuit voltage.
In addition, when battery, which charges to electricity, reaches second threshold, BMS needs to cut off outer in order to meet the requirement of standing
Portion's power supply fixes duration so as to stand duration and reach this；Correspondingly, it needs to be up to when automatic shutdown after battery discharge
This is fixed in duration and cannot charge after to the fixed duration, or insertion power supply adaptor.
In this way, electric discharge window refer to after final static open circuit potential and electric discharge after charging final static open circuit potential it
Difference.
The open-circuit voltage refers to: end voltage of the battery under open-circuit condition.The open-circuit voltage of battery is equal to battery disconnected
When road (when no electric current passes through the two poles of the earth) electrode potential of the anode electrode potential and cathode of battery difference.
The scheme of the embodiment of the present invention can be adapted for the battery (as shown in Figure 2) of single battery core or the single simultaneously battery core of more strings.
For going here and there the battery of single and battery core, in other words, N (being greater than or equal to 2), a battery core had more strings single and structure, this structure more
In, there are at least two cascaded structures and a parallel-connection structures.
So, when practical application, the battery core of many batteries may be the more simultaneously structures of more strings, as shown in Fig. 3 to 5.Namely
It says, N number of battery core has the first series and parallel structure；There are at least two cascaded structures and at least two for first series and parallel structure
Parallel-connection structure.In this case, it needs to go here and there by the switch (generally field effect transistor (FET)) in structure more more and ties
Structure is converted into the single simultaneously structure of more strings, to acquire the independent voltage of each battery core and identical electric current.The electricity of each battery core at this time
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 and parallel structure；First series and parallel structure
There are at least two cascaded structures and at least two parallel-connection structures；The second open-circuit voltage of the acquisition 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, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure
There are at least two cascaded structures and a parallel-connection structures.
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, M the first parameters and circulation time are utilized using electric discharge window as Y-axis using cycle-index as X-axis
Number carries out linear fit, so that the difference (least square meaning) of obtained linear function and the first point set is minimum, to obtain
Degree of fitting R2And slope K.
Step 103: utilizing the first coefficient and the second parameter, in conjunction with inspection policies, judge battery core with the presence or absence of circulation risk.
Here, the judgement battery core is with the presence or absence of circulation risk, and refer to: the battery core is in the charge and discharge cycles in later period
It is no there are rapid decay or circulation diving (circulation volume conservation rate rapid attenuation to setting threshold value (can be understood as setting
Specification, for example be set to close to 0%)) risk.
When determining that battery core has circulation risk, controller (such as embedded controller (EC) etc.) can be allowed according to existing
Intervention Strategy, interference the operating voltage etc. of battery (for example reduce) is made to battery, so that effectively extend battery uses the longevity
Life.
When practical application, after M charge and discharge cycles of every progress, step 101~103 are carried out, to judge whether battery core deposits
Circulation risk, fitting when, cycle period refers to the actual cycle-index of battery, for example for, it is assumed that every 50 are followed
In the ring period, be performed both by step 101~103, then in the 51st~100 cycle period, when fitting used cycle period
It is 51~100, it is subsequent and so on.
The detection method of battery provided in an embodiment of the present invention, for each battery core, in M charge and discharge cycles period,
Determine first parameter in each charge and discharge cycles period；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 corresponding curve of first linear function
Meet the distribution of first centrostigma, and determines the second parameter；First point set includes M by the first parameter and corresponding follows
The point of ring period-producer；The second parameter characterization degree of fitting；Sentenced using the first coefficient and the second parameter in conjunction with inspection policies
Power off core with the presence or absence of circulation risk, by electric discharge 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 the health status for quickly and accurately judging battery core, so as to timely
Interference is made to battery in ground, improves the service life of battery.
Embodiment two
The embodiment of the present invention provides a kind of detection method of battery, and the method is applied in electronic equipment.
Wherein, the battery includes N number of battery core；N is the integer more than or equal to 1.
Here, when 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 two battery detection method of the embodiment of the present invention, as shown in fig. 6, this method includes
Following steps:
Step 601: being directed to each battery core, in M charge and discharge cycles period, determine the of each charge and discharge cycles period
One parameter；
Here, the first parameter characterization electric discharge window；M is the integer more than or equal to 2.
When practical application, M can according to need setting, for example be set as 40,50 or 60 etc..It, can be in order to facilitate statistics
It is set as 50.
The M charge and discharge cycles period refers to: cycle-index M.
It can be seen that the first parameter in order to obtain from the definition of electric discharge window, it is fully charged and discharged to need to acquire battery
At the open-circuit voltage of two states.
Based on this, in one embodiment, the specific implementation of step 601 may include:
In each charge and discharge cycles period, acquire under 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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
Here, the electricity that the first state characterizes the battery reaches second threshold, i.e., battery fill with electricity or
Reach a certain threshold value.The electricity of battery described in second state representation is less than or equal to first threshold, i.e. battery discharge finishes.
Wherein, when practical application, the second threshold be can be set as needed, for example the electricity of the battery reaches
Two threshold values characterize the electricity saturation of the battery, alternatively, being saturated the electricity of battery for the protection to battery core, but reaching
To some specific threshold value.
It, can in order to acquire the first open-circuit voltage under first state and the open-circuit voltage under the second state when practical application
First threshold is arranged by Firmware, the power supply of electronic equipment can be cut when capacity reaches first threshold after battery discharge
It changes, so that electronic equipment is closed.
Complete charge to discharge off this during, when the electricity of battery reaches second threshold, BMS will record this
After process 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 stationary state.
In order to take consistency a little, to guarantee the reliability of result, can be arranged by Firmware quiet after completely filling
Only the quiescent time after time and electric discharge is disposed as some and fixes duration, such as 5~60min, in this way, quiet when fully charged after
It sets duration to reach after this fixes duration, BMS will record open-circuit voltage, and duration is stood after discharge off when reaching this fixation
After length, BMS will record corresponding open-circuit voltage.
In addition, when battery, which charges to electricity, reaches second threshold, BMS needs to cut off outer in order to meet the requirement of standing
Portion's power supply fixes duration so as to stand duration and reach this；Correspondingly, it needs to be up to when automatic shutdown after battery discharge
This is fixed in duration and cannot charge after to the fixed duration, or insertion power supply adaptor.
In this way, electric discharge window refer to after final static open circuit potential and electric discharge after charging final static open circuit potential it
Difference.
The open-circuit voltage refers to: end voltage of the battery under open-circuit condition.The open-circuit voltage of battery is equal to battery disconnected
When road (when no electric current passes through the two poles of the earth) electrode potential of the anode electrode potential and cathode of battery difference.
The scheme of the embodiment of the present invention can be adapted for the battery (as shown in Figure 2) of single battery core or the single simultaneously battery core of more strings.
For going here and there the battery of single and battery core, in other words, N (being greater than or equal to 2), a battery core had more strings single and structure, this structure more
In, there are at least two cascaded structures and a parallel-connection structures.
So, when practical application, the battery core of many batteries may be the more simultaneously structures of more strings, as shown in Fig. 3 to 5.Namely
It says, N number of battery core has the first series and parallel structure；There are at least two cascaded structures and at least two for first series and parallel structure
Parallel-connection structure.In this case, the more and structure that needs more to go here and there by the switch (generally FET) in structure is converted into lists of going here and there more
And structure, to acquire the independent voltage of each battery core and identical electric current.The electric current of each battery core is the same at this time, 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 and parallel structure；First series and parallel structure
There are at least two cascaded structures and at least two parallel-connection structures；The second open-circuit voltage of the acquisition 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, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure
There are at least two cascaded structures and a parallel-connection structures.
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, M the first parameters and circulation time are utilized using electric discharge window as Y-axis using cycle-index as X-axis
Number carries out linear fit, so that the difference (least square meaning) of obtained linear function and the first point set is minimum, to obtain
Degree of fitting R2And slope K.
Step 603: second parameter is squared, obtain third parameter；And third parameter and the second parameter are utilized, knot
Inspection policies are closed, judge battery core with the presence or absence of circulation risk.
Specifically, when the third parameter is greater than the first value, and the second parameter is less than or equal to second value, battery core is determined
In the presence of circulation risk.
Here, this method of determination is suitable for the case where single battery core and more battery cores, that is to say, that when N is greater than or equal to 1
When, electricity is determined when the third parameter is greater than the first value, and the second parameter is less than or equal to second value for each battery core
There is circulation risk in core.
It is another in second parameter and N number of battery core when the third parameter is greater than third value and is less than or equal to the first value
When the difference of second parameter of one battery core exceeds four values, determine that corresponding battery core has circulation risk.
Here, this method of determination is suitable for the case where more battery cores, that is to say, that when N is greater than or equal to 2, for every
A battery core, when the third parameter be greater than third value and be less than or equal to the first value, second parameter with it is another in N number of battery core
When the difference of second parameter of a battery core exceeds four values, determine that corresponding battery core has circulation risk.
It is another in second parameter and N number of battery core when the third parameter is greater than the 5th value and is less than or equal to third value
When the difference of second parameter of one battery core exceeds six values, determine that corresponding battery core has circulation risk.
Here, here, this method of determination is suitable for the case where more battery cores, that is to say, that right when N is greater than or equal to 2
In each battery core, when the third parameter is greater than the 5th value and is less than or equal to third value, in second parameter and N number of battery core
When the difference of second parameter of another battery core exceeds six values, determine that corresponding battery core has circulation risk.
When these above-mentioned conditions are all unsatisfactory for, illustrate that the battery core is also healthier.
When practical application, first value, second value, third value, the 4th value, the 5th value and the 6th value can pass through statistics
Method is arranged, or can also be provided by empirical value.
For example for, by the above method, the first value, second value, third value, the 5th value can be set and be respectively as follows:
0.5、0、0.3、0.2。
Here, the judgement battery core is with the presence or absence of circulation risk, and refer to: the battery core is in the charge and discharge cycles in later period
It is no there are rapid decay or circulation diving (circulation volume conservation rate rapid attenuation to setting threshold value (can be understood as setting
Specification, for example be set to close to 0%)) 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 the operating voltage etc. for reducing battery) is made, effectively to extend the service life of battery.
When practical application, after M charge and discharge cycles of every progress, step 601~603 are carried out, to judge whether battery core deposits
Circulation risk, fitting when, cycle period refers to the actual cycle-index of battery, for example for, it is assumed that every 50 are followed
In the ring period, be performed both by step 601~603, then in the 51st~100 cycle period, when fitting used cycle period
It is 51~100, it is subsequent and so on.
By taking battery structure shown in Fig. 2 as an example, it is assumed that every 50 cycle periods do primary judgement, the first value, second value,
Three values, the 5th value are respectively as follows: 0.5,0,0.3,0.2.
There are three battery cores, respectively C1, C2, C3 for battery tool.In each cyclic process, if tri- battery cores of C1, C2, C3
Electric discharge window be respectively as follows:
Window1=OCVfc1-OCVdc1；
Window2=OCVfc2-OCVdc2；
Window3=OCVfc3-OCVdc3；
Wherein, OCVfc indicates that static open-circuit voltage that is fully charged rear or being charged to some threshold value, OCVdc indicate electric discharge
After static open-circuit voltage.
Using Window as Y-axis, recurring number Cycle is X-axis.Finish 50 times circulation after, take 0~50 time circulation Window with
Corresponding number (1~50) does linear fit, available 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:
1, as the R of battery core2>0.5 and K<0, then determining the battery core, there are remanent life risks；
2 or battery core 0.3 < 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 it is right
In C1, | K1-K2 | > threshold1 (the 4th value) then can be determined that there are remanent life risks for C1；
3 or battery core 0.2 < 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 it is right
In C1, | K1-K2 | > threshold2 (the 6th value) then can be determined that there are remanent life risks for C1；
4, when above-mentioned condition is all unsatisfactory for, illustrates battery core subsequent service life also health, observe subsequent circulation.
After finishing 100 circulations, the Window of 51~100 circulations is taken to do linear fit with corresponding number (51~100),
Available degree of fitting R2 and slope K.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 battery core with the presence or absence of remanent life risk.
Below and so on.
It should be understood that still can judge that battery core whether there is in the above described manner when battery is single core strueture
Remanent life risk, so unlike: when judging whether there is remanent life risk, the first above-mentioned condition can only be used
Judge, i.e., as the R of battery core2>0.5 and K<0, then determining the battery core, there are remanent life risks.
Current battery has some interference measures, since extend battery life, and these interference measures are fixed, than
Such as after cycle-index reaches 100 times, the operating voltage of battery is reduced, cycle-index reduces battery after reaching 300 times again again
Operating voltage.In this case, when use scheme provided in an embodiment of the present invention, corresponding to not up to interference measure
Cycle-index be detected by battery it is subsequent exist circulation risk when, can in advance using these interference measures；Certainly, when reaching
Still be not detected when cycle-index corresponding to interference measure battery it is subsequent exist circulation risk when, 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 period,
Determine first parameter in each charge and discharge cycles period；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 corresponding curve of first linear function
Meet the distribution of first centrostigma, and determines the second parameter；First point set includes M 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 third parameter；And benefit
Judge that battery core with the presence or absence of circulation risk, passes through electric discharge window and circulation in conjunction with inspection policies with third parameter and the second parameter
Period carries out linear fit, judges that battery core with the presence or absence of circulation risk, so, it is possible quick, quasi- using degree of fitting and slope
Really judge the health status of battery core, so as to make interference to battery in time, improves the service life of battery.
Embodiment three
Based on the detection method of above-mentioned battery, the embodiment of the invention also provides a kind of electronic equipment, as shown in fig. 7, should
Electronic equipment includes:
Battery 71, the battery include N number of battery core；N is the integer more than or equal to 1；
Processor 72 in M charge and discharge cycles period, determines each charge and discharge cycles week for being directed to each battery core
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 corresponding curve of first linear function 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, in conjunction with inspection policies, judges that battery core whether there is and follow
Ring risk.
In one embodiment, the processor 72, is specifically used for:
In each charge and discharge cycles period, acquire under 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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
In one embodiment, the processor 72, is specifically used for:
Second parameter is squared, obtain third parameter；When the third parameter is greater than the first value, and the second parameter
When less than or equal to second value, determine that battery core has circulation risk.
Wherein, when the third parameter is greater than third value and is less than or equal to the first value, second parameter and N number of battery core
In the difference of the second parameter of another battery core when exceeding four values, the processor 72 determines corresponding battery core, and there are circulated airs
Danger；
It is another in second parameter and N number of battery core when the third parameter is greater than the 5th value and is less than or equal to third value
When the difference of second parameter of one battery core exceeds six values, the processor 72 determines that corresponding 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 and parallel structure；It is described
There are at least two cascaded structures and at least two parallel-connection structures for first series and parallel structure；The processor 72, is also used to:
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure
There are at least two cascaded structures and a parallel-connection structures.
It will be appreciated by those skilled in the art that before the realization function of each component in electronic equipment shown in Fig. 7 can refer to
It states the associated description of the detection method of battery and understands.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment
A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction
" in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, knot
Structure or characteristic can combine in any suitable manner in one or more embodiments.It should be understood that in various implementations of the invention
In example, magnitude of the sequence numbers of the above procedures are not meant that the order of the execution order, the execution sequence Ying Yiqi function of each process
It can determine that the implementation process of the embodiments of the invention shall not be constituted with any limitation with internal logic.The embodiments of the present invention
Serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.Apparatus embodiments described above are merely indicative, for example, the division of the unit, only
A kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can combine, or
It is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each composition portion
Mutual coupling or direct-coupling or communication connection is divided to can be through some interfaces, the INDIRECT COUPLING of equipment or unit
Or communication connection, it can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit
The component shown can be or may not be physical unit；Both it can be located in one place, and may be distributed over multiple network lists
In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated in one processing unit, it can also
To be each unit individually as a unit, can also be integrated in one unit with two or more units；It is above-mentioned
Integrated unit both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can store in computer-readable storage medium, which exists
When execution, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: movable storage device, read-only deposits
The various media that can store program code such as reservoir (ROM, Read Only Memory), magnetic or disk.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and as independent product
When selling or using, it also can store in a computer readable storage medium.Based on this understanding, the present invention is implemented
Substantially the part that contributes to existing technology can be embodied in the form of software products the technical solution of example in other words,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
It is personal computer, server or network equipment etc.) execute all or part of each embodiment the method for the present invention.
And storage medium above-mentioned includes: various Jie that can store program code such as movable storage device, ROM, magnetic or disk
Matter.
Based on this, the embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer journey
Sequence when the computer program is run by processor, executes:
For each battery core of battery, in M charge and discharge cycles period, the first of each charge and discharge cycles period is determined
Parameter；The first parameter characterization electric discharge window；The battery includes 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 first linear function is corresponding
Curve meets the distribution of first centrostigma, and determines the second parameter；First point set includes M by the first parameter and correspondence
Cycle period formed point；The second parameter characterization degree of fitting；
Judge battery core with the presence or absence of circulation risk in conjunction with inspection policies using the first coefficient and the second parameter.
In one embodiment, it when the computer program is run by processor, executes:
In each charge and discharge cycles period, acquire under 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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
In one embodiment, it when the computer program is run by processor, executes:
Second parameter is squared, obtain third parameter；
When the third parameter is greater than the first value, and the second parameter is less than or equal to second value, determines that battery core exists and follow
Ring risk.
In one embodiment, it when the computer program is run by processor, executes:
Second parameter is squared, obtain third parameter；
It is another in second parameter and N number of battery core when the third parameter is greater than third value and is less than or equal to the first value
When the difference of second parameter of one battery core exceeds four values, determine that corresponding battery core has circulation risk.
In one embodiment, it when the computer program is run by processor, executes:
Second parameter is squared, obtain third parameter；
It is another in second parameter and N number of battery core when the third parameter is greater than the 5th value and is less than or equal to third value
When the difference of second parameter of one battery core exceeds six values, determine that corresponding battery core has circulation risk.
In one embodiment, it when the computer program is run by processor, also executes:
Before the second open-circuit voltage of the acquisition battery core in the second condition, when the electricity of the battery is less than or equal to
When first threshold, switching signal is received；
According to the switching signal, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure
There are at least two cascaded structures and a parallel-connection structures；Wherein,
N is the integer more than or equal to 2；N number of battery core has the first series and parallel structure；First series and parallel structure
There are at least two cascaded structures and at least two parallel-connection structures.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is 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 includes N number of battery core；N is the integer more than or equal to 1；The method packet
It includes:
For each battery core, in M charge and discharge cycles period, first parameter in each charge and discharge cycles period is determined；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 corresponding curve of first linear function
Meet the distribution of first centrostigma, and determines the second parameter；First point set includes M by the first parameter and corresponding follows
The point of ring period-producer；The second parameter characterization degree of fitting；
Judge battery core with the presence or absence of circulation risk in conjunction with inspection policies using third parameter and the second parameter.
2. determination is each filled the method according to claim 1, wherein described in M charge and discharge cycles period
First parameter in discharge cycles period, comprising:
In each charge and discharge cycles period, second under battery core the first open-circuit voltage in the first state and the second state is acquired
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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
3. the method according to claim 1, wherein described utilize third parameter and the second parameter, in conjunction with detection
Strategy judges battery core with the presence or absence of circulation risk, comprising:
Second parameter is squared, obtain third parameter；
When the third parameter is greater than the first value, and the second parameter is less than or equal to second value, determining battery core, there are circulated airs
Danger.
4. the method according to claim 1, wherein described utilize third parameter and the second parameter, in conjunction with detection
Strategy judges battery core with the presence or absence of circulation risk, comprising:
Second parameter is squared, obtain third parameter；
When the third parameter is greater than third 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 exceeds four values, determine that corresponding battery core has circulation risk.
5. the method according to claim 1, wherein described utilize third parameter and the second parameter, in conjunction with detection
Strategy judges battery core with the presence or absence of circulation risk, comprising:
Second parameter is squared, obtain third parameter；
When the third parameter is greater than the 5th value and less than or equal to third value, second parameter and another in N number of battery core
When the difference of second parameter of battery core exceeds six values, determine that corresponding battery core has circulation risk.
6. according to the method described in claim 2, it is characterized in that, N is the integer more than or equal to 2；N number of battery core has
First series and parallel structure；There are at least two cascaded structures and at least two parallel-connection structures for first series and parallel structure；It is described
Before acquiring the second open-circuit voltage of battery core in the second condition, the method 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, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure exists
At least two cascaded structures and a parallel-connection structure.
7. a kind of electronic equipment, comprising:
Battery, the battery include N number of battery core；N is the integer more than or equal to 1；
Processor in M charge and discharge cycles period, determines the of each charge and discharge cycles period for being directed to each battery core
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 corresponding curve of first linear function 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 third parameter and the second parameter are utilized, in conjunction with inspection policies, judge battery core with the presence or absence of circulation risk.
8. electronic equipment according to claim 7, which is characterized in that the processor is specifically used for:
In each charge and discharge cycles period, second under battery core the first open-circuit voltage in the first state and the second state is acquired
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 greater than the first threshold；
First open-circuit voltage and the second open-circuit voltage are asked poor, obtain first parameter.
9. electronic equipment according to claim 7, which is characterized in that the processor is specifically used for:
Second parameter is squared, obtain third parameter；When the third parameter is greater than the first value, and the second parameter is less than
When equal to second value, determine that battery core has circulation risk；
Alternatively, second parameter is squared, obtain third parameter；When the third parameter is greater than third value and is less than or waits
When the difference of the second parameter of another battery core exceeds four values in the first value, second parameter and N number of battery core, determining pair
Battery core is answered to there is circulation risk；
Alternatively, second parameter is squared, obtain third parameter；When the third parameter is greater than the 5th value and is less than or waits
When the difference of the second parameter of another battery core exceeds six values in third value, second parameter and N number of battery core, determining pair
Battery core is answered to there is circulation risk.
10. electronic equipment according to claim 9, which is characterized in that N is the integer more than or equal to 2；N number of electricity
Core has the first series and parallel structure；First series and parallel structure is there are at least two cascaded structures and at least two and is coupled
Structure；The processor, is also used to:
When the electricity of the battery is less than or equal to first threshold, switching signal is received；
According to the switching signal, controls N number of battery core and form the second series and parallel structure；Second series and parallel structure exists
At least two cascaded structures and a parallel-connection structure.
11. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of any one of claim 1 to 6 the method is realized when being executed by processor.
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