CN104377396B - A kind of lithium battery group charging method - Google Patents
A kind of lithium battery group charging method Download PDFInfo
- Publication number
- CN104377396B CN104377396B CN201410621731.8A CN201410621731A CN104377396B CN 104377396 B CN104377396 B CN 104377396B CN 201410621731 A CN201410621731 A CN 201410621731A CN 104377396 B CN104377396 B CN 104377396B
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- current
- charging
- battery
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- charge
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 239000000178 monomer Substances 0.000 claims abstract description 24
- 230000005611 electricity Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H02J7/0027—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention puies forward a kind of lithium battery group charging method，Using constant current precharge mode、Constant current equalizaing charge pattern、Constant-pressure drop current charging mode、Constant current trickle charge pattern this four-stage progressively reduces the diversity of battery cell，By the charging interval and the charging current that control monomer poor-performing，Relatively low cell is full of，Higher battery can be bled off by equilibrium，So as to reach the effect for reducing cell diversity well，And in constant-voltage charge pattern battery can be caused for a period of time to obtain certain recovery using stopping charging，The magnitude of voltage of the cell of high voltage has declined，The battery of low voltage is enabled to extend the charging interval，Trickle charge is carried out with minimum charge current finally，This section of charging interval lengthens，So that the battery of low voltage continues to obtain continuous for a long time filling，By extending the charging interval in whole charging process，Reduce the diversity of cell，Reach battery and fill fuller、The longer effect of battery life.
Description
Technical field
The present invention relates to a kind of method for charging batteries, particularly a kind of lithium battery group charging method.
Background technology
Current battery charging mode according to user, the particularly charge mode to lithium battery, mainly using constant current, constant-voltage charge pattern
Successively battery is charged, this charging method is although it is contemplated that the fundamental characteristics of battery, ensure that lithium to a certain extent
Can be full of before the life cycle of battery, single or a few battery composition set of cells is relatively suitable for, but at present
The set of cells in electric automobile industry is applied all to be that multiple cells are combined in series, the characteristic of each cell
Different, with the use of battery, the environment residing for battery cell is also different, particularly in the middle and late stage of battery life,
So simple constant current, constant voltage mode charging method can cause the discordance of battery cell increasing, high-tension monomer
After first reaching stopping of charging, the battery of low-voltage is also not up to, and is just constantly in underfill state finally for whole set of cells,
The life-span of serious curtailment set of cells.
The content of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of lithium battery for reducing diversity between battery cell
Group charging method.
To solve above-mentioned technical problem, the technical scheme that the present invention is provided is：A kind of lithium battery group charging method, including four
The individual stage：
Constant current precharge mode, with the small current constant current value I for setting0Line precharge is entered to set of cells, when set of cells it is average
Voltage reaches setting value V0Or highest monomer voltage Vmax and minimum monomer voltage Vmin difference △ V reach arranges value △ V0When, knot
Beam pre-charge process；
Constant current equalizaing charge pattern, with constant high current I1Constant-current charge is carried out, is set when highest monomer voltage Vmax reaches
Definite value V1When, battery management system opens balance module, and highest monomer voltage Vmax is carried out at balanced consumed energy in advance
Reason；
Constant-pressure drop current charging mode, highest monomer voltage Vmax reach setting value V2Or total voltage reaches setting value
During Vsumv, suspend charging setting time value T0Carry out dropping electric current charging with step-length electric current Istep afterwards, when highest monomer voltage
Vmax reaches setting value V again2Or total voltage is when reaching setting value Vsumv again, stop charging setting time value T again0Afterwards
Carry out dropping electric current charging with step-length electric current Istep again, and circulated with this, until charging current drops to the minimum electricity that charges of setting
Next charge mode is entered after stream Imin；
Constant current trickle charge pattern, carries out constant current charge to set of cells with minimum charge current Imin, until highest
Monomer voltage reaches setting value V3When, charging terminates.
Preferably, in the charging process, when cell occurs more than setting value V1When, battery management system control is opened
Open balance module.
Preferably, the small current constant current value I0 and constant high current I1Reference battery factory setting value, subsequently can be with electricity
Tankage decay re-scale, the small current constant current value I0 be battery nominal capacity 0.1C, constant high current I1For 10
Ampere～80 amperes.
Preferably, the T0, Istep be defined by Battery Plant's setting value, the T0For 2 seconds～180 seconds, Istep was 2 amperes
～25 amperes.
Preferably, the V0、△V0、V1、Imin、V2、V3, Vsumv according to the practical situation of different batteries set, the V0
For 2.6 volts～3.1 volts, the △ V0For 0.3 volt～1 volt, the V1For 3.3 volts～3.6 volts, the Imin
For 2 amperes～10 amperes, the V2For 3.4 volts～3.65 volts, the V3For 3.55 volts～3.75 volts, the Vsumv
For 340 volts～365 volts.
Compared with prior art, the invention has the advantages that：
The present invention provides a kind of lithium battery group charging method, progressively reduces the diversity of battery cell using four-stage,
By the charging interval and charging current that control monomer poor-performing, i.e. monomer performance highest or minimum battery so that relatively low
Cell can be full of higher battery can be bled off by equilibrium, so as to reach the effect for reducing cell diversity well
Really, and in constant-voltage charge pattern battery can be caused for a period of time to obtain certain recovery using stopping charging, high voltage
The magnitude of voltage of cell has declined so that the battery of low voltage can extend the charging interval, finally with the minimum electricity that charges
Stream carries out trickle charge, and this section of charging interval lengthens so that the battery of low voltage continues to obtain continuing for a long time to fill, and entirely fills
In electric process by extend the charging interval, reduce cell diversity, reach battery fill fuller, battery life it is longer
Effect.
Description of the drawings
Fig. 1 is charging current curve figure of the present invention.
Specific embodiment
For the ease of it will be appreciated by those skilled in the art that carrying out further to the present invention below in conjunction with accompanying drawing and embodiment
Describe in detail.
Embodiment
As shown in figure 1, a kind of lithium battery group charging method, whole charging process includes that constant current precharge mode, constant current are equal
Weighing apparatus charge mode, constant-pressure drop current charging mode and constant current trickle charge pattern.Carried out by these four charge modes successively, made
Obtain the diversity for reducing battery cell step by step.It is illustrated by taking 20V 100AH ferric phosphate lithium cell groups as an example below：
Constant current precharge mode A：After charging is opened, reference battery factory setting value is entered with the nominal capacity 0.1C of battery
Row small current constant current value I0=10A is pre-charged, and the small current constant current value can be re-scaled with battery capacity decay, work as set of cells
Average voltage reaches setting value VO=2.8V or highest monomer voltage and minimum monomer voltage difference △ V（Vmax-Vmin）Reach and set
Put value △ V0During=0.5V, terminate pre-charge process, at the battery discharge end initial stage, battery with two side terminals is poor, it is permanent with small current
What the battery that current charge can cause voltage high rose will not be too fast, starts just to reduce the diversity of battery from charging, then enters
Enter constant current equalizaing charge pattern.
Constant current equalizaing charge Mode B：With constant high current I1=50A carries out constant-current charge, in charging process, due to most
High monomer voltage Vmax rises and must reach setting value V at first than very fast1During=3.45V, the equilibrium model of battery management system is opened
Block, carries out balanced consumed energy process in advance to highest monomer voltage, and reaching further reduces the purpose of battery diversity.
Constant-pressure drop current charging mode C：When highest monomer voltage Vmax reaches setting value V2=3.55V or total voltage reach
During to setting value Vsumv=355V, into constant-pressure drop current charging mode, now temporarily first stop charging, reduce inside battery point
The active degree of son so that Vmax voltages have declined, and charging dwell time reaches T0During=20S, charging is reopened, now
Charging current carries out drop current processing, carries out step-length electric current Istep=5A drop electric currents and charges.Treat next time when highest monomer voltage
Vmax reaches setting value V2=3.55 or total voltage when reaching setting value Vsumv=355, continue to suspend and charge, charge when stopping
Between T0=20S, then reopen charging and carry out dropping electric current with step-length electric current Istep=5A and charge, above-mentioned charging process is recirculated,
Till charging current drops to setting value minimum charge current Imin i.e. battery nominal capacity 0.1C i.e. 10A.Due at this
Stage voltage such as reuses large current charge high-voltage battery and will soon reach protection cut-off already at the high state of comparison
Voltage stops charging so as to cause charging to terminate, now and cell voltage can be caused for a period of time necessarily to be recovered, charging current
Carrying out dropping current processing can also make to be charged to and rise to every time setting value V2Time it is elongated, can so cause relatively low voltage
The time that battery can fill every time lengthens.
Constant current trickle charge pattern D：Continue to charge set of cells with minimum charge current Imin=5A constant current, until
When highest monomer voltage reaches setting value V3When=3.65, charging terminates.Carried out with minimum charge current in the final stage for charging
Trickle charge is until charging setting voltage value V3When, this section of charging interval lengthens so that the battery of low voltage continues to be grown
The continuous of time fills.
And in whole charging process, when cell occurs more than setting value V1When, battery management system balance module
In opening.Whole charging process extends the charging interval, reduces the diversity of battery, reaches so that battery fills more
It is full, extend the effect of battery life.
It is the wherein specific implementation of the present invention above, its description is more concrete and detailed, but therefore can not manage
Solution is the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from
On the premise of present inventive concept, some deformations and improvement can also be made, these obvious alternative forms belong to this
Bright protection domain.
Claims (4)
1. a kind of lithium battery group charging method, it is characterised in that including four kinds of charge modes, four kinds of charge modes enter successively
OK：
（1）Constant current precharge mode, with the small current constant current value I for setting0Line precharge is entered to set of cells, when set of cells it is averagely electric
Pressure reaches setting value V0Or highest monomer voltage Vmax and minimum monomer voltage Vmin difference △ V reach arranges value △ V0When, terminate
Pre-charge process；
（2）Constant current equalizaing charge pattern, with constant high current I1Constant-current charge is carried out, when highest monomer voltage Vmax reaches setting
Value V1When, battery management system opens balance module, carries out balanced consumed energy process in advance to highest monomer voltage Vmax；
（3）Constant-pressure drop current charging mode, highest monomer voltage Vmax reach setting value V2Or total voltage reaches setting value
During Vsumv, suspend charging setting time value T0Carry out dropping electric current charging with step-length electric current Istep afterwards, when highest monomer voltage
Vmax reaches setting value V again2Or total voltage is when reaching setting value Vsumv again, stop charging setting time value T again0Afterwards
Carry out dropping electric current charging with step-length electric current Istep again, and circulated with this, until charging current drops to the minimum electricity that charges of setting
Next charge mode is entered after stream Imin；
（4）Constant current trickle charge pattern, carries out constant current charge to set of cells with minimum charge current Imin, until highest list
Bulk voltage reaches setting value V3When, charging terminates；In whole charging process, when cell occurs more than setting value V1When, electricity
Balance module is opened in pond management system control.
2. lithium battery group charging method according to claim 1, it is characterised in that：The small current constant current value I0With it is constant
High current I1Reference battery factory setting value, subsequently can re-scale with battery capacity decay, described to be precharged as with battery
Nominal capacity 0.1C carries out small current constant current value I0Precharge；Constant high current I1For 10 amperes～80 amperes.
3. lithium battery group charging method according to claim 2, it is characterised in that：The T0, Istep with Battery Plant set
Value is defined, the T0For 2 seconds～180 seconds, Istep was 2 amperes～25 amperes.
4. lithium battery group charging method according to claim 3, it is characterised in that：The V0、△V0、V1、Imin、V2、V3、
Vsumv is set according to the practical situation of different batteries, the V0For 2.6 volts～3.1 volts, the △ V0For 0.3 volt～1
Volt, the V1For 3.3 volts～3.6 volts, the Imin is 2 amperes～10 amperes, the V2For 3.4 volts～3.65 volts
Spy, the V3For 3.55 volts～3.75 volts, the Vsumv is 340 volts～365 volts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410621731.8A CN104377396B (en) | 2014-11-07 | 2014-11-07 | A kind of lithium battery group charging method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410621731.8A CN104377396B (en) | 2014-11-07 | 2014-11-07 | A kind of lithium battery group charging method |
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| CN104377396A CN104377396A (en) | 2015-02-25 |
| CN104377396B true CN104377396B (en) | 2017-04-05 |
Family
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Families Citing this family (22)
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| US11159897B2 (en) * | 2015-11-16 | 2021-10-26 | Sonova Ag | Method for charging a battery of a hearing aid and a hearing aid with a battery charging unit |
| CN107054106B (en) * | 2016-07-25 | 2020-06-19 | 江苏聚合新能源科技有限公司 | Charging control method for lithium ion battery pack |
| CN106877464A (en) * | 2017-04-24 | 2017-06-20 | 知谷（上海）网络科技有限公司 | Charge control method and charging equipment |
| CN109149676B (en) * | 2017-06-27 | 2021-09-24 | 深圳市中兴微电子技术有限公司 | Method and device for controlling charging current |
| DE102018214566A1 (en) * | 2018-08-29 | 2020-03-05 | Robert Bosch Gmbh | Method for carrying out a combined charging and cell balancing process for an electrically powered means of transportation |
| CN111193296B (en) * | 2018-11-15 | 2022-03-29 | 杭州海康机器人技术有限公司 | Pre-charging control device and method |
| CN109586367A (en) * | 2018-12-03 | 2019-04-05 | 浙江大学昆山创新中心 | A kind of charging method for ferric phosphate lithium cell |
| CN111509320A (en) * | 2019-01-30 | 2020-08-07 | 北京小米移动软件有限公司 | Charging method and device |
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| WO2021114683A1 (en) * | 2019-12-09 | 2021-06-17 | 超威电源集团有限公司 | Charger and charging method therefor |
| CN111342156A (en) * | 2019-12-09 | 2020-06-26 | 超威电源集团有限公司 | Charging method of storage battery |
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| CN112072725A (en) * | 2020-07-24 | 2020-12-11 | 浙江亚特电器有限公司 | Charging control method and device suitable for charger |
| CN112737032B (en) * | 2020-12-29 | 2023-09-29 | 科华恒盛股份有限公司 | Battery charging control method, control device and terminal |
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| CN113246783B (en) * | 2021-06-07 | 2021-10-01 | 蜂巢能源科技有限公司 | Charging control method and device, electronic equipment and vehicle |
| CN113401006A (en) * | 2021-07-06 | 2021-09-17 | 山东元齐新动力科技有限公司 | Vehicle-mounted lithium battery charging method and system |
| CN117375183B (en) * | 2023-12-05 | 2024-03-19 | 深圳市易检车服科技有限公司 | Battery balance management method |
| CN117477727B (en) * | 2023-12-25 | 2024-03-22 | 湖南北顺源智能科技有限公司 | Balanced management method and system for underwater standby uninterruptible power supply |
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| JPH08213055A (en) * | 1995-02-08 | 1996-08-20 | Honda Motor Co Ltd | Charging method of battery pack and its device |
| CN1315239C (en) * | 2003-09-04 | 2007-05-09 | 北京市世纪博纳能源技术有限责任公司 | Battery with equalizing charge controlling circuit |
| JP5020530B2 (en) * | 2006-04-14 | 2012-09-05 | パナソニック株式会社 | Charging method, battery pack and charger thereof |
| CN103579703B (en) * | 2012-07-26 | 2016-03-30 | 中国移动通信集团甘肃有限公司 | A kind of method for charging battery pack and system |
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