CN110018421A - Battery state monitoring method and system - Google Patents
Battery state monitoring method and system Download PDFInfo
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- CN110018421A CN110018421A CN201910428521.XA CN201910428521A CN110018421A CN 110018421 A CN110018421 A CN 110018421A CN 201910428521 A CN201910428521 A CN 201910428521A CN 110018421 A CN110018421 A CN 110018421A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 205
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000000178 monomer Substances 0.000 claims description 59
- 238000007600 charging Methods 0.000 claims description 45
- 230000005611 electricity Effects 0.000 claims description 45
- 238000007667 floating Methods 0.000 claims description 45
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000011069 regeneration method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Abstract
This application involves a kind of battery state monitoring method and systems.Battery state monitoring method, is applied to monitoring host, which includes: to obtain the free state information of each single battery in the integrality information and battery pack of battery pack in the Historical Monitoring period；According to the integrality information of battery pack and the free state information of each single battery, the status monitoring result of battery pack is obtained.The status monitoring result accuracy with higher obtained by the battery state monitoring method.
Description
Technical field
This application involves power battery technology fields, in particular to a kind of battery state monitoring method and system.
Background technique
Battery pack is a kind of chemical cell that can be repeatedly charged and discharged, can for transportation system, communication electric system,
The electricity systems such as defence and military system provide power source.But being continuously increased with battery cyclic charge and discharge number, battery
Group state can also gradually degrade, until can not normal use, at this point, in order to avoid due to the working performance of electricity system drop
It is low, caused by security risk occur, it will usually to can not the battery pack of normal use replace.Therefore, how quasi-
The status monitoring of battery pack really is obtained as a result, becoming power battery technology neck using the reference conditions as replacement battery pack
Domain technical problem urgently to be resolved.
Summary of the invention
The embodiment of the present application is designed to provide a kind of battery state monitoring method and system, is accurately obtained with realizing
Obtain the technical effect of the status monitoring result of battery pack.
In a first aspect, the embodiment of the present application provides a kind of battery state monitoring method, it is applied to monitoring host, it is described
Method, comprising:
Each single battery in the integrality information and the battery pack of battery pack in the acquisition Historical Monitoring period
Free state information；
According to the integrality information of the battery pack and the free state information of each single battery, described in acquisition
The status monitoring result of battery pack.
Battery state monitoring method provided by the embodiments of the present application, can be according to battery pack in the Historical Monitoring period
In integrality information and battery pack the free state information acquisition battery pack of each single battery status monitoring as a result,
It further include battery simultaneously as obtaining the Variable Factors of the status monitoring result in addition to the integrality information for including battery pack
The free state information of each single battery in group, therefore, the status monitoring result accuracy with higher.
With reference to first aspect, the embodiment of the present application provides the first possible embodiment of first aspect, described whole
Body status information includes multiple whole discharge voltages, and the free state information includes multiple monomer discharge voltages, the state
Monitoring result includes the first monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, obtain
The status monitoring result of the battery pack, comprising:
According to multiple whole discharge voltages of the battery pack, first electricity of the battery pack in first time period is obtained
Drops rate；
According to multiple monomer discharge voltages of each single battery, each single battery is obtained at the first time
Second voltage rate of descent in section；
In the second voltage rate of descent of all single batteries, exists and meet between the first voltage rate of descent
When the second voltage rate of descent of the first preset relation, generates single battery and replace prompt information, as first monitoring result.
Battery state monitoring method provided by the embodiments of the present application, can be according to multiple whole electric discharge electricity of battery pack
Pressure obtains first voltage rate of descent of the battery pack in first time period, and is put according to multiple monomers of each single battery
Piezoelectric voltage obtains second voltage rate of descent of each single battery in first time period, when the second electricity of all single batteries
In drops rate, when there is the second voltage rate of descent for meeting the first preset relation between first voltage rate of descent, generate single
Body battery altering prompt information, as the first monitoring result.In this way, when there is the generation of the first monitoring result, it just can be according to life
At the first monitoring result, determine can not normal use single battery, thus by ensuring the comprehensive of status monitoring result
Property, realize the technical effect for accurately obtaining the status monitoring result of battery pack.
With reference to first aspect, second of first aspect provided by the embodiments of the present application possible embodiment, the list
Body status information includes multiple monomer internal resistances, and the status monitoring result includes the first monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, obtain
The status monitoring result of the battery pack, comprising:
According to multiple monomer internal resistances of each single battery, each battery cell is obtained in second time period
Monomer internal resistance increase rate, in the second time period, the battery pack is in floating charge state；
According to monomer internal resistance increase rate of all battery cells in second time period, all battery lists are obtained
Average internal resistance increase rate of the body in second time period；
In the monomer internal resistance increase rate of all single batteries, exists and meet between the average internal resistance increase rate
When the monomer internal resistance increase rate of the second preset relation, generates single battery and replace prompt information, as first monitoring result.
Battery state monitoring method provided by the embodiments of the present application, can be according in multiple monomers of each single battery
Resistance, obtains monomer internal resistance increase rate of each battery cell in second time period, and in second time period, battery pack is in floating
State, and the monomer internal resistance increase rate according to all battery cells in second time period are filled, all battery cells is obtained and exists
Average internal resistance increase rate in second time period in the monomer internal resistance increase rate of all single batteries, exists and average internal resistance
When meeting the monomer internal resistance increase rate of the second preset relation between increment rate, generates single battery and replace prompt information, as the
One monitoring result.In this way, just can determine nothing according to the first monitoring result of generation when there is the generation of the first monitoring result
The single battery of method normal use, to realize by ensuring the comprehensive of status monitoring result and accurately obtain battery pack
The technical effect of status monitoring result.
With reference to first aspect, the third possible embodiment of first aspect provided by the embodiments of the present application, the list
Body status information includes multiple monomer internal resistances, and the status monitoring result includes the first monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, obtain
The status monitoring result of the battery pack, comprising:
According to multiple monomer internal resistances of each single battery, each battery cell is obtained within the third period
Monomer internal resistance increase rate, within the third period, the battery pack is in floating charge state；
It is greater than the monomer internal resistance for presetting increment rate threshold value when existing in the monomer internal resistance increase rate of all single batteries
When increment rate, generates single battery and replace prompt information, as first monitoring result.
Battery state monitoring method provided by the embodiments of the present application, can be according in multiple monomers of each single battery
Resistance, obtains monomer internal resistance increase rate of each battery cell within the third period, and within the third period, battery pack is in floating
State is filled, is greater than the monomer internal resistance increase rate for presetting increment rate threshold value when existing in the monomer internal resistance increase rate of all single batteries
When, it generates single battery and replaces prompt information, as the first monitoring result.In this way, just can when there is the generation of the first monitoring result
Enough the first monitoring results according to generation, determine can not normal use single battery, thus by ensuring status monitoring knot
Fruit it is comprehensive, realize accurately obtain battery pack status monitoring result technical effect.
With reference to first aspect, the 4th kind of possible embodiment of first aspect provided by the embodiments of the present application, it is described whole
Body status information includes multiple whole discharge currents and multiple whole charging currents, and the status monitoring result includes the second monitoring
As a result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, obtain
The status monitoring result of the battery pack, comprising:
According to multiple whole discharge currents of the battery pack, obtains entirety of the battery pack within the 4th period and put
Power consumption, within the 4th period, the battery pack is in floating charge state；
According to multiple whole charging currents of the battery pack, obtains entirety of the battery pack within the 4th period and fill
Power consumption；
When meeting third preset relation between the whole discharge electricity amount and the whole charge capacity, it is different to generate floating charge
Normal prompt information, as second monitoring result.
Battery state monitoring method provided by the embodiments of the present application, can be according to multiple whole electric discharge electricity of battery pack
Stream obtains whole discharge electricity amount of the battery pack within the 4th period, and within the 4th period, battery pack is in floating charge state,
And multiple whole charging currents according to battery pack, whole charge capacity of the battery pack within the 4th period is obtained, when whole
When meeting third preset relation between body discharge electricity amount and whole charge capacity, floating charge abnormal prompt information is generated, as second
Monitoring result.In this way, when have floating charge abnormal prompt information generation when, just can determine the battery pack can not normal use, from
And by ensuring the comprehensive of status monitoring result, realize the technical effect for accurately obtaining the status monitoring result of battery pack.
With reference to first aspect, the 5th kind of possible embodiment of first aspect provided by the embodiments of the present application, it is described whole
Body status information includes multiple whole discharge currents and multiple whole charging currents, and the status monitoring result includes the second monitoring
As a result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, obtain
The status monitoring result of the battery pack, comprising:
According to multiple whole discharge currents of the battery pack, obtains entirety of the battery pack within the 5th period and put
Power consumption, within the 5th period, the battery pack is in floating charge state；
According to multiple whole charging currents of the battery pack, obtains entirety of the battery pack within the 5th period and fill
Power consumption；
Obtain the electricity difference between the whole charge capacity and the whole discharge electricity amount；
When meeting four preset relations between the electricity difference and the rated capacitance of the battery pack, floating charge is generated
Abnormal prompt information, as second monitoring result.
Battery state monitoring method provided by the embodiments of the present application, can be according to multiple whole electric discharge electricity of battery pack
Stream obtains whole discharge electricity amount of the battery pack within the 5th period, and within the 5th period, battery pack is in floating charge state,
And multiple whole charging currents according to battery pack, whole charge capacity of the battery pack within the 5th period is obtained, and obtain
The electricity difference between whole charge capacity and whole discharge electricity amount is obtained, when between electricity difference and the rated capacitance of battery pack
When meeting four preset relations, floating charge abnormal prompt information is generated, as the second monitoring result.In this way, when there is floating charge to mention extremely
Show information generate when, just can determine the battery pack can not normal use, thus by ensuring the comprehensive of status monitoring result
Property, realize the technical effect for accurately obtaining the status monitoring result of battery pack.
With reference to first aspect, the 6th kind of possible embodiment of first aspect provided by the embodiments of the present application, the shape
State monitoring result includes third monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, obtain
The status monitoring result of the battery pack, comprising:
According to the integrality information of the battery pack, the theoretical pot life of the battery pack is obtained；
According to the integrality information of the battery pack, the prediction pot life of the battery pack is obtained；
According to the theoretical pot life and the prediction pot life, the true pot life of the battery pack is obtained,
As third monitoring result.
Battery state monitoring method provided by the embodiments of the present application can be obtained according to the integrality information of battery pack
The theoretical pot life of battery pack is obtained, and according to the integrality information of battery pack, obtains the prediction pot life of battery pack,
And according to theoretical pot life and prediction pot life, the true pot life of battery pack is obtained, as third monitoring result.Such as
This, the true pot life of battery pack can also be obtained by the battery state monitoring method provided in the embodiment of the present application,
So that it is guaranteed that status monitoring result is comprehensive, simultaneously as the true pot life is according to theoretical pot life and prediction
What pot life obtained, therefore, accuracy with higher.
The 6th kind of possible embodiment with reference to first aspect, the embodiment of the present application provide the 7th kind of first aspect
Possible embodiment, the integrality information include multiple whole discharge currents and multiple whole charging currents；
The integrality information according to the battery pack, obtains the theoretical pot life of the battery pack, comprising:
Obtain initial capacitance of the battery pack in historical time section；
According to the multiple whole discharge currents and the battery of the initial capacitance of the battery pack, the battery pack
Multiple whole charging currents of group, obtain the capacitance present amount of the battery pack；
The present discharge electric current of the battery pack is selected from multiple whole discharge currents of the battery pack；
According to the capacitance present amount of the present discharge electric current of the battery pack and the battery pack, the battery pack is obtained
Theoretical pot life.
It is first in historical time section can to obtain battery pack for battery state monitoring method provided by the embodiments of the present application
Beginning capacitance, according to the initial capacitance of battery pack, multiple whole discharge currents of battery pack and multiple entirety of battery pack
Charging current obtains the capacitance present amount of battery pack, and selects battery pack from multiple whole discharge currents of battery pack
Present discharge electric current, the capacitance present amount of present discharge electric current and battery pack further according to battery pack, obtains the theory of battery pack
Pot life.The theory pot life accuracy with higher, to ensure that the accuracy of true pot life.
The 6th kind of possible embodiment with reference to first aspect, the embodiment of the present application provide the 8th kind of first aspect
Possible embodiment, the integrality information include multiple whole discharge voltages；
The integrality information according to the battery pack, obtains the prediction pot life of the battery pack, comprising:
The Historical Monitoring period of the battery pack is divided into multiple sub- periods；
According to multiple whole discharge voltages of the battery pack, the battery pack is obtained within each sub- period
Tertiary voltage rate of descent；
According to multiple whole discharge voltages of the battery pack and the battery pack within each sub- period
Tertiary voltage rate of descent obtains the prediction pot life of the battery pack.
Battery state monitoring method provided by the embodiments of the present application can divide the Historical Monitoring period of battery pack
For multiple sub- periods, and according to multiple whole discharge voltages of battery pack, the of battery pack within each sub- period is obtained
Three voltage rates of descent, further according to the third within each sub- period of multiple whole discharge voltages and battery pack of battery pack
Voltage rate of descent obtains the prediction pot life of battery pack.The prediction pot life accuracy with higher, to ensure that
The accuracy of true pot life.
Second aspect, the embodiment of the present application provides a kind of battery state monitoring system, for carrying out shape to battery pack
State monitoring, the battery pack includes M single battery, and the battery state monitoring system includes the first sensing device, second
Sensing device and monitoring host, first sensing device connect with the monitoring host and the battery pack respectively, and described the
Two sensing devices are provided with M, and M second sensing devices and the M single batteries correspond, and each described second
Sensing device is connected with the monitoring host and the corresponding single battery respectively；
First sensing device is used to obtain the integrality information of the battery pack, and is sent to the monitoring master
Machine；
Each second sensing device is used to obtain the free state information of the corresponding single battery, and is sent to
The monitoring host；
The monitoring host is for executing above-mentioned in a first aspect, or mentioning in any possible embodiment of first aspect
The battery state monitoring method of confession.
Battery state provided by the embodiments of the present application monitors system, can obtain battery pack by the first sensing device
Integrality information, and it is sent to the monitoring host, and corresponding single battery is obtained by each second sensing device
Free state information, and be sent to monitoring host, and monitor host then according to the integrality information of battery pack, and each
The free state information of single battery obtains the status monitoring of battery pack as a result, variable due to obtaining the status monitoring result
The factor further includes the free state information of each single battery in battery pack in addition to the integrality information for including battery pack, because
This, the status monitoring result accuracy with higher.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the schematic block diagram that a kind of battery state provided by the embodiments of the present application monitors system.
Fig. 2 is that battery state shown in Fig. 1 monitors systematic difference schematic diagram of a scenario.
Fig. 3 is another schematic block diagram that battery state provided by the embodiments of the present application monitors system.
Fig. 4 is a kind of flow chart of battery state monitoring method provided by the embodiments of the present application.
Fig. 5 is the first seed step flow chart of step S200 in Fig. 4.
Fig. 6 is the second seed flow chart of steps of step S200 in Fig. 4.
Fig. 7 is the third seed step flow chart of step S200 in Fig. 4.
Fig. 8 is the 4th seed step flow chart of step S200 in Fig. 4.
Fig. 9 is the 5th seed step flow chart of step S200 in Fig. 4.
Figure 10 is the 6th seed step flow chart of step S200 in Fig. 4.
Figure 11 is the sub-step flow chart of step S261 in Figure 10.
Figure 12 is the sub-step flow chart of step S262 in Figure 10.
Drawing reference numeral: 100- battery state monitors system；The first sensing device of 110-；111- first voltage sensor；
112- current sensor；The second sensing device of 120-；121- second voltage sensor；122- internal resistance sensor；123- temperature passes
Sensor；130- monitors host；The station 140- machine；150- server；160- electric terminal；200- battery pack；210- single battery.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Fig. 1 and Fig. 2 are please referred to, the embodiment of the present application provides a kind of battery state monitoring system 100, for battery
Group 200 carries out status monitoring, and battery pack 200 includes M single battery 210, wherein M >=2, and be integer.Battery pack 200 is wrapped
The first anode and the first cathode are included, in the M single battery 210 that battery pack 200 includes, each single battery 210 includes second
Anode and the second cathode.In addition, the M single battery 210 that battery pack 200 includes can connect in the embodiment of the present application for series connection
It connects, or be connected in parallel, below by by taking M single battery 210 that battery pack 200 includes is to be connected in series as an example, to this
The battery state monitoring system 100 that application embodiment provides is described.
It includes the first sensing device 110, the second sensing device 120 and monitoring host that battery state, which monitors system 100,
130, the first sensing device 110 is connect with monitoring host 130 and battery pack 200 respectively, and the second sensing device 120 is provided with M,
The second sensing device of M 120 is corresponded with M single battery 210, each second sensing device 120 respectively with monitor host
130 and corresponding single battery 210 connect.
First sensing device 110 is used to obtain the integrality information of battery pack 200, and is sent to monitoring host 130.It is whole
Body status information may include whole discharge voltage, whole charging current and whole discharge current, therefore, the embodiment of the present application
In, the first sensing device 110 may include first voltage sensor 111 and current sensor 112.Wherein, first voltage senses
Device 111 is connect with the first anode of battery pack 200 and the first cathode respectively, for obtaining the whole discharge voltage of battery pack 200.
Current sensor 112 can be the induction type current-sensings such as Hall current sensor, Rogowski coil, and current sensor 112 can
With in the connection cables that are sheathed between first voltage sensor 111 and the first anode of battery pack 200, for obtaining battery pack
200 whole charging current and whole discharge current.
Each second sensing device 120 is used to obtain the free state information of corresponding single battery 210, and is sent to prison
Survey host 130.Free state information may include monomer discharge voltage, monomer internal resistance and surface temperature, and therefore, the application is implemented
In example, the second sensing device 120 may include second voltage sensor 121, internal resistance sensor 122 and temperature sensor 123.Its
In, second voltage sensor 121 is connect with the second anode of single battery 210 and the second cathode respectively, for obtaining monomer electricity
The monomer discharge voltage in pond 210.Internal resistance sensor 122 is connect with the second anode of single battery 210 and the second cathode respectively, is used
In the monomer internal resistance for obtaining single battery 210.Temperature sensor 123 then fits in the surface of single battery 210, for obtaining list
The surface temperature of body battery 210.
Host 130 is monitored to be used for according to the integrality information of battery pack 200 and the monomer of each single battery 210
Status information obtains the status monitoring result of battery pack 200.It includes electricity that Variable Factors due to obtaining the status monitoring result, which remove,
It further include the free state information of each single battery 210 in battery pack 200 outside the integrality information of pond group 200, therefore,
The status monitoring result accuracy with higher.
In addition, in order to reduce the complexity of battery state monitoring 100 physical structure of system, in the embodiment of the present application,
First voltage sensor 111 can integrate in monitoring host 130, second voltage sensor 121, internal resistance sensor 122 and temperature
Degree sensor 123 can integrate in one, meanwhile, current sensor 112, M second voltage sensor 121, M internal resistance sensing
It can be communicated using bus communication mode between device 122 and M temperature sensor 123 and monitoring host 130, for example,
Serial bus communication mode or ring bus communication pattern.
Referring to Fig. 3, it can also include station machine 140, service that battery state, which monitors system 100, in the embodiment of the present application
Device 150 and electric terminal 160.Machine 140 of standing is connect with monitoring host computer and server 150 respectively, is sent for obtaining monitoring host computer
Status monitoring as a result, being formatted to status monitoring result, and be sent to server 150.Server 150 is gone back and electronics
Terminal 160 connects, and the status monitoring result for will receive is sent to electric terminal 160, and shows.
Referring to Fig. 4, additionally providing a kind of battery state monitoring method in the embodiment of the present application, it is applied to above-mentioned monitoring
Host, that is, above-mentioned monitoring host is for executing battery state monitoring method provided by the embodiments of the present application.It needs to illustrate
It is that battery state monitoring method provided by the embodiments of the present application is not limitation with Fig. 4 and sequence as shown below, below in conjunction with
The detailed process and step of battery state monitoring method is described in Fig. 4.
Step S100, each list in the integrality information and battery pack of battery pack in the acquisition Historical Monitoring period
The free state information of body battery.
The Historical Monitoring period include at least one charging time section and at least one discharge time section, and the charging time section
In include at least one floating charge period.In addition, in the embodiment of the present application one-shot battery group will be obtained at interval of preset duration
Integrality information and battery pack in each single battery free state information, which can not be 1s, but not
It is limited to 1s, it is understood, therefore, that in the embodiment of the present application, integrality information includes multiple whole discharge voltages, multiple
Whole charging current and multiple whole discharge currents, the free state information of each single battery include multiple monomer electric discharges
Voltage, multiple monomer internal resistances and multiple surface temperatures.
Step S200 is obtained according to the integrality information of battery pack and the free state information of each single battery
The status monitoring result of battery pack.
It include M single battery in battery pack, therefore, each single battery can influence the state of battery pack, it is based on this,
In the embodiment of the present application, each single battery will be monitored, when determining that exist in M single battery can not normal use
When single battery, generates single battery and replace prompt information, as the first monitoring result.
Referring to Fig. 5, being based on above description, as the first embodiment, step S200 may include step S211, step
Rapid S212, tri- sub-steps of step S213.
Step S211 obtains first of battery pack in first time period according to multiple whole discharge voltages of battery pack
Voltage rate of descent.
First time period is any time period in discharge time section, in addition, in the embodiment of the present application, in first time period
The whole discharge voltage of acquisition includes at least 600, that is, the time of first time period is long when above-mentioned preset duration is 1s
Degree is at least 5min.
Step S212 obtains each single battery at first according to multiple monomer discharge voltages of each single battery
Between second voltage rate of descent in section.
Step S213 in the second voltage rate of descent of all single batteries, exists full between first voltage rate of descent
When the second voltage rate of descent of the first preset relation of foot, generates single battery and replace prompt information, as the first monitoring result.
In the embodiment of the present application, the first preset relation can be with are as follows:
Du2> mDu1
Wherein, Du1For first voltage rate of descent, Du2For second voltage rate of descent, m can be 2, but be not limited to 2.
Referring to Fig. 6, step S200 may include step S221, step S222 and step as second of embodiment
Tri- sub-steps of S223.
Step S221 obtains each battery cell in second time period according to multiple monomer internal resistances of each single battery
Interior monomer internal resistance increase rate, in second time period, battery pack is in floating charge state.
In the embodiment of the present application, charging time section includes filling period and floating charge period, and fill in the period and obtain
The whole charging current obtained is greater than the whole charging current obtained in the floating charge period.Second time period is in the floating charge period
Any time period, in addition, the whole charging current obtained in second time period includes at least 600 in the embodiment of the present application,
That is, the time span of second time period is at least 5min when above-mentioned preset duration is 1s.
Step S222 obtains all batteries according to monomer internal resistance increase rate of all battery cells in second time period
Average internal resistance increase rate of the monomer in second time period.
Step S223 in the monomer internal resistance increase rate of all single batteries, exists full between average internal resistance increase rate
When the monomer internal resistance increase rate of the second preset relation of foot, generates single battery and replace prompt information, as the first monitoring result.
In the embodiment of the present application, the second preset relation can be with are as follows:
Ir1> nIr2
Wherein, Ir1For monomer internal resistance increase rate, Ir2For average internal resistance increase rate, n can be 2, but be not limited to 2.
Referring to Fig. 7, step S200 may include two sons of step S231 and step S232 as the third embodiment
Step.
Step S231 obtains each battery cell in the third period according to multiple monomer internal resistances of each single battery
Interior monomer internal resistance increase rate, within the third period, battery pack is in floating charge state.
In the embodiment of the present application, charging time section includes filling period and floating charge period, and fill in the period and obtain
The whole charging current obtained is greater than the whole charging current obtained in the floating charge period.The third period is in the floating charge period
Any time period, in addition, the monomer internal resistance obtained in the third period includes at least 600 in the embodiment of the present application, that is,
When above-mentioned preset duration is 1s, the time span of third period is at least 5min.
Step S232 is greater than the monomer for presetting increment rate threshold value when existing in the monomer internal resistance increase rate of all single batteries
When internal resistance increase rate, generates single battery and replace prompt information, as the first monitoring result.
In the embodiment of the present application, the value for presetting increment rate threshold value can be 30%, but be not limited to 30%.
After obtaining the first monitoring result, just can according to the first monitoring result, determine can not normal use list
Body battery, replaces it, in this way, not only realizing by ensuring the comprehensive of status monitoring result and accurately obtaining electricity
The technical effect of the status monitoring result of pond group, additionally it is possible to avoid the waste of battery resource.
In addition, in order to improve the accuracy of the first monitoring result, it, can also be when all monomers electricity in the embodiment of the present application
Exist in pond while meeting and meets the first preset relation, monomer internal resistance increasing between second voltage rate of descent and first voltage rate of descent
Add and meets the second preset relation and monomer internal resistance increase rate between rate and average internal resistance increase rate greater than default increment rate threshold value
When the single battery of these three Rule of judgment, regeneration single battery replaces prompt information, as the first monitoring result.
When the state of battery pack gradually degrades, until can not normal use when, floating charge state can also exist abnormal, be based on
This, in the embodiment of the present application, will also be monitored the floating charge state of battery pack, when battery pack floating charge state exception, generate
Floating charge abnormal prompt information, as the second monitoring result.
Referring to Fig. 8, being based on above description, as the 4th kind of embodiment, step S200 may include step S241, step
Tri- sub-steps of rapid S242 and step S243.
Step S241 obtains entirety of the battery pack within the 4th period according to multiple whole discharge currents of battery pack
Discharge electricity amount, within the 4th period, battery pack is in floating charge state.
In the embodiment of the present application, whole discharge electricity amount can be according to the time span and battery pack of the 4th period the 4th
The average value of all whole discharge currents in period obtains.
In the embodiment of the present application, charging time section includes filling period and floating charge period, and fill in the period and obtain
The whole charging current obtained is greater than the whole charging current obtained in the floating charge period.4th period was in the floating charge period
Any time period, meanwhile, the 4th period was also in discharge time section, that is, battery pack is in simultaneously in the 4th period
(floating charge) state of charging and discharge condition.In addition, the whole discharge current obtained in the 4th period is extremely in the embodiment of the present application
It less include 600, that is, the time span of the 4th period is at least 5min when above-mentioned preset duration is 1s.
Step S242 obtains entirety of the battery pack within the 4th period according to multiple whole charging currents of battery pack
Charge capacity.
Equally, in the embodiment of the present application, whole charge capacity can be according to the time span and battery pack of the 4th period
The average value of all whole charging currents within the 4th period obtains.
Step S243 generates floating charge when meeting third preset relation between whole discharge electricity amount and whole charge capacity
Abnormal prompt information, as the second monitoring result.
In the embodiment of the present application, third preset relation can be with are as follows:
C2> xC1
Wherein, C1For whole discharge electricity amount, C2For whole charge capacity, x can be 3, but be not limited to 3.
Referring to Fig. 9, step S200 may include step S251, step S252, step as the 5th kind of embodiment
Tetra- sub-steps of S253, step S254.
Step S251 obtains entirety of the battery pack within the 5th period according to multiple whole discharge currents of battery pack
Discharge electricity amount, within the 5th period, battery pack is in floating charge state.
In the embodiment of the present application, whole discharge electricity amount can be according to the time span and battery pack of the 5th period the 5th
The average value of all whole discharge currents in period obtains.
In the embodiment of the present application, charging time section includes filling period and floating charge period, and fill in the period and obtain
The whole charging current obtained is greater than the whole charging current obtained in the floating charge period.5th period was in the floating charge period
Any time period, meanwhile, the 5th period was also in discharge time section, that is, battery pack is in simultaneously in the 5th period
(floating charge) state of charging and discharge condition.In addition, the whole discharge current obtained in the 5th period is extremely in the embodiment of the present application
It less include 600, that is, the time span of the 5th period is at least 5min when above-mentioned preset duration is 1s.
Step S252 obtains entirety of the battery pack within the 5th period according to multiple whole charging currents of battery pack
Charge capacity.
Equally, in the embodiment of the present application, whole charge capacity can be according to the time span and battery pack of the 5th period
The average value of all whole charging currents within the 5th period obtains.
Step S253 obtains the electricity difference between whole charge capacity and whole discharge electricity amount.
Step S254 is generated floating when meeting four preset relations between electricity difference and the rated capacitance of battery pack
Abnormal prompt information is filled, as the second monitoring result.
In the embodiment of the present application, the 4th preset relation can be with are as follows:
C3> yC4
Wherein, C3For electricity difference, C4For the rated capacitance of battery pack, y can be 20%, but be not limited to 20%.
After obtaining the second monitoring result, just can determine battery pack can not normal use, in this way, will pass through ensures
Status monitoring result it is comprehensive, realize accurately obtain battery pack status monitoring result technical effect.
In the embodiment of the present application, status monitoring result can also include third monitoring result, to characterize the true of battery pack
Real pot life.
Referring to Fig. 10, to realize foregoing invention design, as the 6th kind of embodiment, in the embodiment of the present application, step
S200 may include step S261, step S262 and tri- sub-steps of step S263.
Step S261 obtains the theoretical pot life of battery pack according to the integrality information of battery pack.
Incorporated by reference to Figure 11, in the embodiment of the present application, step S261 may include step S2611, step S2612, step again
Tetra- sub-steps of S2613 and step S2614.
Step S2611 obtains initial capacitance of the battery pack in historical time section.
Step S2612, according to the initial capacitance of battery pack, multiple whole discharge currents of battery pack and battery pack
Multiple whole charging currents, obtain the capacitance present amount of battery pack.
In the embodiment of the present application, the average value of multiple whole discharge currents of battery pack can be obtained, according to multiple entirety
The average value of discharge current and whole discharge time obtain whole discharge electricity amount, meanwhile, obtain multiple whole chargings of battery pack
The average value of electric current obtains whole charge capacity according to the average value of multiple whole charging currents and whole charging time, this
Afterwards, according to initial capacitance, whole discharge electricity amount and whole charge capacity, the capacitance present amount of battery pack is obtained.
Step S2613 selects the present discharge electric current of battery pack from multiple whole discharge currents of battery pack.
In the embodiment of the present application, present discharge electric current is entirety of the acquisition time after in multiple whole discharge currents
Discharge current.
Step S2614 obtains the reason of battery pack according to the capacitance present amount of the present discharge electric current of battery pack and battery pack
By pot life.
In the embodiment of the present application, theoretical pot life be battery pack capacitance present amount and present discharge electric current quotient,
Namely:
T1=C/I
Wherein, T1For theoretical pot life, C is capacitance present amount, and I is present discharge electric current.
Step S262 obtains the prediction pot life of battery pack according to the integrality information of battery pack.
Incorporated by reference to Figure 12, in the embodiment of the present application, step S262 may include step S2621, step S2622 and step again
Tri- sub-steps of S2623.
The Historical Monitoring period of battery pack is divided into multiple sub- periods by step S2621.
In the embodiment of the present application, when above-mentioned preset duration is 1s, the time span of each sub- period can be 1s, but
It is not limited to 1s.
Step S2622 obtains the of battery pack within each sub- period according to multiple whole discharge voltages of battery pack
Three voltage rates of descent.
In the embodiment of the present application, it can be based on following arithmetic logic, according to multiple whole discharge voltages of battery pack, obtained
Tertiary voltage rate of descent of the battery pack within each sub- period.
Ak (n)=(U (n-1)-U (n))/U (n-1)
Wherein, ak (n) is tertiary voltage rate of descent of the battery pack within the n-th sub- period, and U (n-1) is battery pack in (n-
1) the whole discharge voltage at s moment, U (n) are whole discharge voltage of the battery pack at the ns moment.
Step S2623, according to the multiple whole discharge voltages and battery pack of battery pack within each sub- period the
Three voltage rates of descent obtain the prediction pot life of battery pack.
In the embodiment of the present application, it can be based on following arithmetic logic, according to multiple whole discharge voltages of battery pack, and
Tertiary voltage rate of descent of the battery pack within each sub- period, obtains the prediction pot life of battery pack.
Wherein, T2To predict that pot life, U (n) are whole discharge voltage of the battery pack at the n-th s moment, ak (n) is electricity
Tertiary voltage rate of descent of the pond group within the n-th sub- period.In addition, U (n) is less than or equal to cut-off electricity in the embodiment of the present application
Pressure, and blanking voltage can be set according to actual needs, for example, can be set as 10.8V, but be not limited to 10.8V.
Step S263 obtains the true pot life of battery pack according to theoretical pot life and prediction pot life, as
Third monitoring result.
In the embodiment of the present application, it can be based on following arithmetic logic, according to theoretical pot life and prediction pot life, obtained
The true pot life for obtaining battery pack, as third monitoring result.
T=aT1+bT2
Wherein, T is true pot life, T1For theoretical pot life, T2To predict that pot life, a are the first weighted value, b
For the second weighted value, and a and b's and be 1, and the specific value of a and b can then be set according to actual needs, the application is implemented
This is not specifically limited in example.
In the embodiment of the present application, due to the true pot life as third monitoring result be according to theoretical pot life and
Predict what pot life obtained, therefore, accuracy with higher.
In the embodiment of the present application, status monitoring result can also include the 4th monitoring result, to characterize the hair of battery pack
Enthusiastic condition.
To realize foregoing invention design, as the 7th kind of embodiment, in the embodiment of the present application, step S200 be can wrap
Include, when in all single batteries there are surface temperature be greater than preset temperature threshold single battery when, generate temperature pre-warning information,
As the 4th monitoring result.
After obtaining the 4th monitoring result, just it is default can to determine that surface temperature is greater than according to the 4th monitoring result
The single battery of temperature threshold, to pointedly carry out cooling processing to it.In this way, not only by ensuring status monitoring result
It is comprehensive, realize accurately obtain battery pack status monitoring result technical effect, additionally it is possible to by time, have needle
The single battery that property surface temperature is greater than preset temperature threshold carries out cooling processing, improves the bulk life time of battery pack.
In the embodiment of the present application, status monitoring result can also include the 5th monitoring result, to characterize load equipment
It can number of operations.
To realize foregoing invention design, as the 8th kind of embodiment, in the embodiment of the present application, step S200 be can wrap
Include, according to the single operation electricity consumption of the capacitance present amount of battery pack and load equipment, obtain load equipment can number of operations,
As the 5th monitoring result.
The single operation electricity consumption of load equipment can be according to needed for the actual power value of load equipment and single operation
Duration is operated to obtain.Wherein, the actual power value of bearing power is all sampling time points in load tables of equipment time operating process
The average value of corresponding performance number.
By above-mentioned setting, when battery pack is used to provide power source for transportation system, for example, switching for subway railroad switch
Equipment provides power source, that is, just can be obtained according to the 5th monitoring result when load equipment is subway railroad switch switching equipment
Subway railroad switch switching can number of operations, with remind staff can number of operations be zero the case where occur before, to battery
Group is replaced, or is charged to battery pack, to avoid reducing due to subway railroad switch switching equipment working performance, and is caused
Security risk occur.
In conclusion battery state monitoring method provided by the embodiments of the present application and system, can pass through the first sensing
Device obtains the integrality information of battery pack, and is sent to monitoring host, and passes through the acquisition pair of each second sensing device
The free state information for the single battery answered, and it is sent to monitoring host, and host is monitored then according to the integrality of battery pack
The free state information of information and each single battery obtains the status monitoring of battery pack as a result, due to obtaining state prison
The Variable Factors of result are surveyed in addition to the integrality information for including battery pack, further include the monomer of each single battery in battery pack
Status information, therefore, the status monitoring result accuracy with higher.
In several embodiments provided herein, it should be understood that disclosed method can also pass through others
Mode is realized.The apparatus embodiments described above are merely exemplary, for example, the flow chart in attached drawing is shown according to this
The method architecture, function and operation in the cards of multiple embodiments of application.In this regard, each side in flow chart
Frame can represent a part of a module, section or code, and a part of described program section or code includes one or more
A executable instruction for implementing the specified logical function.It should also be noted that in some implementations as replacement, side
The function of being marked in frame can also occur in a different order than that indicated in the drawings.For example, two continuous boxes are practical
On can be basically executed in parallel, they can also be executed in the opposite order sometimes, and this depends on the function involved.Also it wants
It is noted that the combination of each box in flow chart and the box in flow chart, it can the function as defined in executing or dynamic
The dedicated hardware based system made is realized, or can be realized using a combination of dedicated hardware and computer instructions.
In addition, each functional module in each embodiment of the application can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) execute each embodiment the method for the application all or part of the steps.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), arbitrary access are deposited
The various media that can store program code such as reservoir (Random Access Memory, RAM), magnetic or disk.
The above description is only an example of the present application, the protection scope being not intended to limit this application, for ability
For the technical staff in domain, various changes and changes are possible in this application.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.It should also be noted that similar label and
Letter indicates similar terms in following attached drawing, therefore, once it is defined in a certain Xiang Yi attached drawing, then in subsequent attached drawing
In do not need that it is further defined and explained.
In addition it is also necessary to explanation, in present specification, the relational terms of such as " first " and " second " or the like
It is only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying these
There are any actual relationship or orders between entity or operation.Moreover, the terms "include", "comprise" or its is any
Other variants are intended to non-exclusive inclusion, so that including the process, method, article or equipment of a series of elements
Include not only those elements, but also including other elements that are not explicitly listed, or further includes for this process, side
Method, article or the intrinsic element of equipment.In the absence of more restrictions, limited by sentence "including a ..."
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. a kind of battery state monitoring method, which is characterized in that be applied to monitoring host, the method, comprising:
Obtain the list of each single battery in the integrality information and the battery pack of battery pack in the Historical Monitoring period
Body status information；
According to the integrality information of the battery pack and the free state information of each single battery, the battery is obtained
The status monitoring result of group.
2. battery state monitoring method according to claim 1, which is characterized in that the integrality information includes more
A entirety discharge voltage, the free state information include multiple monomer discharge voltages, and the status monitoring result includes first
Monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, described in acquisition
The status monitoring result of battery pack, comprising:
According to multiple whole discharge voltages of the battery pack, obtain under first voltage of the battery pack in first time period
Drop rate；
According to multiple monomer discharge voltages of each single battery, each single battery is obtained in first time period
Second voltage rate of descent；
In the second voltage rate of descent of all single batteries, exists and meet first between the first voltage rate of descent
When the second voltage rate of descent of preset relation, generates single battery and replace prompt information, as first monitoring result.
3. battery state monitoring method according to claim 1, which is characterized in that the free state information includes more
A monomer internal resistance, the status monitoring result include the first monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, described in acquisition
The status monitoring result of battery pack, comprising:
According to multiple monomer internal resistances of each single battery, list of each battery cell in second time period is obtained
Body internal resistance increase rate, in the second time period, the battery pack is in floating charge state；
According to monomer internal resistance increase rate of all battery cells in second time period, obtains all battery cells and exist
Average internal resistance increase rate in second time period；
In the monomer internal resistance increase rate of all single batteries, exists and meet second between the average internal resistance increase rate
When the monomer internal resistance increase rate of preset relation, generates single battery and replace prompt information, as first monitoring result.
4. battery state monitoring method according to claim 1, which is characterized in that the free state information includes more
A monomer internal resistance, the status monitoring result include the first monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, described in acquisition
The status monitoring result of battery pack, comprising:
According to multiple monomer internal resistances of each single battery, list of each battery cell within the third period is obtained
Body internal resistance increase rate, within the third period, the battery pack is in floating charge state；
Increase when there is the monomer internal resistance for being greater than default increment rate threshold value in the monomer internal resistance increase rate of all single batteries
When rate, generates single battery and replace prompt information, as first monitoring result.
5. battery state monitoring method according to claim 1, which is characterized in that the integrality information includes more
A entirety discharge current and multiple whole charging currents, the status monitoring result include the second monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, described in acquisition
The status monitoring result of battery pack, comprising:
According to multiple whole discharge currents of the battery pack, whole electric discharge electricity of the battery pack within the 4th period is obtained
Amount, within the 4th period, the battery pack is in floating charge state；
According to multiple whole charging currents of the battery pack, whole charging electricity of the battery pack within the 4th period is obtained
Amount；
When meeting third preset relation between the whole discharge electricity amount and the whole charge capacity, generates floating charge and mention extremely
Show information, as second monitoring result.
6. battery state monitoring method according to claim 1, which is characterized in that the integrality information includes more
A entirety discharge current and multiple whole charging currents, the status monitoring result include the second monitoring result；
It is described according to the integrality information of the battery pack and the free state information of each single battery, described in acquisition
The status monitoring result of battery pack, comprising:
According to multiple whole discharge currents of the battery pack, whole electric discharge electricity of the battery pack within the 5th period is obtained
Amount, within the 5th period, the battery pack is in floating charge state；
According to multiple whole charging currents of the battery pack, whole charging electricity of the battery pack within the 5th period is obtained
Amount；
Obtain the electricity difference between the whole charge capacity and the whole discharge electricity amount；
When meeting four preset relations between the electricity difference and the rated capacitance of the battery pack, it is abnormal to generate floating charge
Prompt information, as second monitoring result.
7. battery state monitoring method according to claim 1, which is characterized in that the status monitoring result includes the
Three monitoring results；
It is described according to the integrality information of the battery pack and the free state information of each single battery, described in acquisition
The status monitoring result of battery pack, comprising:
According to the integrality information of the battery pack, the theoretical pot life of the battery pack is obtained；
According to the integrality information of the battery pack, the prediction pot life of the battery pack is obtained；
According to the theoretical pot life and the prediction pot life, the true pot life of the battery pack is obtained, as
Third monitoring result.
8. battery state monitoring method according to claim 7, which is characterized in that the integrality information includes more
A entirety discharge current and multiple whole charging currents；
The integrality information according to the battery pack, obtains the theoretical pot life of the battery pack, comprising:
Obtain initial capacitance of the battery pack in historical time section；
According to the initial capacitance of the battery pack, multiple whole discharge currents of the battery pack and the battery pack
Multiple entirety charging currents, obtain the capacitance present amount of the battery pack；
The present discharge electric current of the battery pack is selected from multiple whole discharge currents of the battery pack；
According to the capacitance present amount of the present discharge electric current of the battery pack and the battery pack, the theory of the battery pack is obtained
Pot life.
9. battery state monitoring method according to claim 7, which is characterized in that the integrality information includes more
A entirety discharge voltage；
The integrality information according to the battery pack, obtains the prediction pot life of the battery pack, comprising:
The Historical Monitoring period of the battery pack is divided into multiple sub- periods；
According to multiple whole discharge voltages of the battery pack, third of the battery pack within each sub- period is obtained
Voltage rate of descent；
According to the third of the multiple whole discharge voltages and the battery pack of the battery pack within each sub- period
Voltage rate of descent obtains the prediction pot life of the battery pack.
10. a kind of battery state monitors system, which is characterized in that for carrying out status monitoring, the battery pack to battery pack
Including M single battery, the battery state monitoring system includes the first sensing device, the second sensing device and monitoring master
Machine, first sensing device are connect with the monitoring host and the battery pack respectively, and second sensing device is provided with M
A, M second sensing devices and the M single batteries correspond, each second sensing device respectively with institute
State monitoring host and the corresponding single battery connection；
First sensing device is used to obtain the integrality information of the battery pack, and is sent to the monitoring host；
Each second sensing device is used to obtain the free state information of the corresponding single battery, and is sent to described
Monitor host；
The monitoring host is for battery state monitoring method described in any one of perform claim requirement 1~9.
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Denomination of invention: Battery pack status monitoring method and system Effective date of registration: 20231228 Granted publication date: 20220201 Pledgee: Chengdu Wuhou Small and Medium Enterprise Financing Guarantee Co.,Ltd. Pledgor: SICHUAN WANGDA TECHNOLOGY CO.,LTD. Registration number: Y2023980075389 |