CN108879816A - A kind of charge control method based on lithium battery characteristic - Google Patents
A kind of charge control method based on lithium battery characteristic Download PDFInfo
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- CN108879816A CN108879816A CN201810570154.2A CN201810570154A CN108879816A CN 108879816 A CN108879816 A CN 108879816A CN 201810570154 A CN201810570154 A CN 201810570154A CN 108879816 A CN108879816 A CN 108879816A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000007600 charging Methods 0.000 claims description 51
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 abstract description 8
- 239000000178 monomer Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H02J7/0077—
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- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses the present invention to provide a kind of new charge control method based on lithium battery characteristic, and this method includes:S1 has detected that lithium battery needs to charge；S2 carries out ladder precharge to lithium battery according to preset pre-charge current；S3 carries out constant-current charge to lithium battery according to preset constant-current charge electric current after completing precharge；S4 carries out constant-voltage charge to lithium battery after completing constant-current charge.Using the present invention, solves the technical issues of charge initiation overcharges in the process.
Description
Technical field
The invention belongs to charging pile technical fields, more particularly to export to the charging for the direct-current charging post that battery plugs in
Control method.
Background technique
Charging pile is divided into two kinds of alternating current and direct current at present, wherein alternating-current charging pile is that alternating current is directly passed through a breaker
Vehicle is passed to, vehicle is charged the battery by its internal electrical energy changer again；Direct-current charging post is then by alternating current
Transformation of electrical energy is carried out in stake, and the battery of vehicle is then directly passed to by switch.
The foundation of present direct-current charging post, output voltage and output electric current is from Vehicular battery management system（With
It is referred to as BMS down）, and in actual application, but there is no in view of current electricity for the output voltage and output electric current that send on BMS
The characteristic of lithium battery used in electrical automobile（The author encounters a plurality of vehicles, the electricity of the charge requirement of BMS and its management at the scene
The charge characteristic in pond is not consistent, and overcharges so as to cause more single battery, the phenomenon of empty electricity）, just to cause very
The problems such as more single batteries overcharges, is empty electric.And the presence of these problems, also result in Vehicular battery whole service life it is short,
Course continuation mileage shortens the fast problem of progress.In addition, such charging modes, also result in the waste of biggish electric energy（Electric energy conversion
Fall for thermal energy consumption）, also increase.
Summary of the invention
It is an object of the invention to provide a kind of new charge control methods based on lithium battery characteristic, solve charge initiation process
In the technical issues of overcharging.
In order to solve the problems existing in the prior art, the present invention provides a kind of new charge control side based on lithium battery characteristic
Method, this method include:
S1 has detected that lithium battery needs to charge；
S2 carries out ladder precharge to lithium battery according to preset pre-charge current；
S3 carries out constant-current charge to lithium battery according to preset constant-current charge electric current after completing precharge；
S4 carries out constant-voltage charge to lithium battery after completing constant-current charge.
The technical program is pre-charged before constant-current charge according to the charge characteristic of lithium battery, is somebody's turn to do the mistake with charging
Journey is the stepped increased process of charging current, i.e., most starts to charge with smaller electric current, after maintaining a period of time, is entered
Next ladder.In this way, one uses low current to charge in each stage, so that electric current is made to be in stepped growth, by
The cumulative electric current for being added to constant-current charge.It eliminates to a certain extent and overcharges problem during charge initiation, make the change of electric current
Change curve and tends to serialization.
Preferably, further include；
Default constant-current charge electric current C；
Pre-charge process is divided into n stage;
The charging current in each stage of default pre-charge process is C/n.
The technical program divides equally constant-current charge electric current according to the stage of precharge, ensure that the increment in each stage
It is identical, so that the variation of electric current is tended to serialization, progressivelyed reach constant-current charge electric current, it is therefore prevented that charge initiation process overcharges
Phenomenon.
Preferably, the step s2 is specifically included：
Each pre-charging stage according to preset electric current and preset time be lithium battery charge, until detecting charging current
Reach preset constant-current charge electric current.
The technical program overcharges phenomenon during eliminating charge initiation.
Preferably, step s4 is specifically included：
The charging voltage for detecting single battery will be limited when the charging voltage of single battery is more than or equal to preset ceiling voltage
Charging current processed is revised as preset excessive current, and after the charging voltage for detecting single battery is restored to standard value, will
Limitation charging current modifies back preset minimum acceptable current.
The technical program when charging voltage is greater than preset ceiling voltage, then reply in the amount of transfiniting by first pause charging
After be further continued for trickle charge, protective effect is played to electric body battery.
Preferably, step s4 is specifically included：
The temperature for detecting single battery, when the temperature of single battery is more than maximum allowable temperature, by limitation charging current modification
For preset excessive current, and after the temperature for detecting single battery is restored to standard value, limitation charging current is modified back
Preset minimum acceptable current.
The technical program is interrupted charging modes using condition, i.e., in the temperature of single battery there are in constant-current charge section
When reaching maximum permissible temperature, first pause charging, the amount of transfiniting is further continued for trickle charge after replying, plays very well to single battery
Protective effect.
The present invention increases in the charging incipient stage and is pre-charged section, rush of current when preventing from starting to charge, in constant pressure
It charges in section, charging modes is interrupted using condition, in monomer voltage or when the temperature is excessively high, first pause charging, the amount of transfiniting is returned
It is further continued for trickle charge after multiple, thus the technical issues of overcharging during solving charge initiation.
Detailed description of the invention
Fig. 1 is a kind of a kind of flow diagram of embodiment of the charge control method based on lithium battery characteristic of the present invention；
Fig. 2 is a kind of curve synoptic diagram comprising pre-charging stage of the charge control method based on lithium battery characteristic of the present invention.
Fig. 3 is that a kind of typical case of the displaying constant voltage charging phase of charge control method based on lithium battery characteristic of the present invention is bent
Line schematic diagram.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
With reference to Fig. 1, which is a kind of a kind of stream of embodiment of the charge control method based on lithium battery characteristic of the present invention
Journey schematic diagram, the process include：
S1 has detected that lithium battery needs to charge；
S2 carries out ladder precharge to lithium battery according to preset pre-charge current；
S3 carries out constant-current charge to lithium battery according to preset constant-current charge electric current after completing precharge；
S4 carries out constant-voltage charge to lithium battery after completing constant-current charge.
When specific implementation, the detailed process of step s2 is different from currently used charging modes, adopts in the charging incipient stage
It is charged with a lesser electric current, after maintaining a period of time, charging current is mentioned to the charging current in constant current section, then
Enter step s3.It therefore, is the stage that charging current is adjusted to ladder in precharge section, although increasing to a certain extent
Added the time of precharge, but eliminate during charge initiation the problem of overcharging, make the change curve of electric current tend to connect
Continuousization.As shown in Fig. 2, the maximum charging current of default constant-current phase is 1C（C is battery capacity, and unit A.h owns below
Description it is equivalent）, pre-charge current divided 5 stages from 0 to 1C, and each stage increases 0.2C.It in practical applications can be with
Actual demand is divided into the stage of different number.Such technical solution reduce the charge initiation stage because of heavy current impact
Caused by phenomena such as monomer voltage is excessively high, monomer temperature is excessively high.
In step s3, i.e. constant-current phase, corresponding monomer battery voltage apart from highest monomer battery voltage farther out, this
A stage does not consider optimizing and revising for control mode, only to limit the operating current in this stage, in general, to the greatest extent
Amount does not exceed 1C.
In step s4, i.e. constant-voltage phase, as shown in figure 3, SOC is higher at this time, the voltage of single battery also connects fastly
Nearly highest monomer battery voltage, at this time be charged as trickle charge, overcharge problem in order to prevent, it is pre- for limiting charging current here
If minimum acceptable current（For example, minimum acceptable current can be the maximum value of 0.1C and 5A）, also, in the charging in this stage
In the process, the parameters such as monomer ceiling voltage, monomer maximum temperature are continued to monitor, are more than or equal in monomer ceiling voltage maximum allowable
When monomer battery voltage or monomer maximum temperature are greater than maximum allowable temperature, limitation charging current is modified into preset limitation
Electric current, such as 0.05C, waiting the value that transfinites to reply is standard value（Normal value）Afterwards, then limitation charging current minimum is modified back to permit
Perhaps electric current.
As can be seen that the technical program increases pre-charging functions in the charging incipient stage, electric current when preventing from starting to charge
Impact；In constant-voltage charge section, charging modes are interrupted using condition, in monomer voltage or when the temperature is excessively high, first pause is filled
Electricity, the amount of transfiniting are further continued for trickle charge after replying.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (5)
1. a kind of charge control method based on lithium battery characteristic, which is characterized in that including：
S1 has detected that lithium battery needs to charge；
S2 carries out ladder precharge to lithium battery according to preset pre-charge current；
S3 carries out constant-current charge to lithium battery according to preset constant-current charge electric current after completing precharge；
S4 carries out constant-voltage charge to lithium battery after completing constant-current charge.
2. the charge control method according to claim 1 based on lithium battery characteristic, which is characterized in that further include；
Default constant-current charge electric current C；
Pre-charge process is divided into n stage;
The charging current in each stage of default pre-charge process is C/n.
3. the charge control method according to claim 2 based on lithium battery characteristic, which is characterized in that the step s2 tool
Body includes：
Each pre-charging stage according to preset electric current and preset time be lithium battery charge, until detecting charging current
Reach preset constant-current charge electric current.
4. the charge control method according to claim 1 based on lithium battery characteristic, which is characterized in that step s4 is specifically wrapped
It includes：
The charging voltage for detecting single battery will be limited when the charging voltage of single battery is more than or equal to preset ceiling voltage
Charging current processed is revised as preset excessive current, and after the charging voltage for detecting single battery is restored to standard value, will
Limitation charging current modifies back preset minimum acceptable current.
5. the charge control method according to claim 1 based on lithium battery characteristic, which is characterized in that step s4 is specifically wrapped
It includes：
The temperature for detecting single battery, when the temperature of single battery is more than maximum allowable temperature, by limitation charging current modification
For preset excessive current, and after the temperature for detecting single battery is restored to standard value, limitation charging current is modified back
Preset minimum acceptable current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810570154.2A CN108879816A (en) | 2018-06-05 | 2018-06-05 | A kind of charge control method based on lithium battery characteristic |
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| CN201810570154.2A CN108879816A (en) | 2018-06-05 | 2018-06-05 | A kind of charge control method based on lithium battery characteristic |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109546704A (en) * | 2018-11-29 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | A kind of power battery fast charge method |
| CN109888420A (en) * | 2019-02-28 | 2019-06-14 | 深圳猛犸电动科技有限公司 | A kind of charging method, device and the terminal device of lithium ion battery packet |
| CN111525201A (en) * | 2020-04-28 | 2020-08-11 | 江西凯马百路佳客车有限公司 | Charging control method for new energy vehicle assembled with lithium iron phosphate battery |
| CN114156968A (en) * | 2021-11-03 | 2022-03-08 | 珠海格力电器股份有限公司 | Charging and discharging control method and device of energy storage system, controller and energy storage system |
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| CN2877107Y (en) * | 2006-01-11 | 2007-03-07 | 惠州市蓝微电子有限公司 | Lithium battery charging managing circuit |
| CN105871032A (en) * | 2016-05-26 | 2016-08-17 | 南京师范大学 | Constant-voltage current-limiting pulse charging control system and charging method thereof |
| CN205595851U (en) * | 2016-04-26 | 2016-09-21 | 深圳科华鑫电子有限公司 | Lithium batteries ware IC chip |
| CN107579553A (en) * | 2017-08-11 | 2018-01-12 | 湖南小步科技有限公司 | The charge control method and device of a kind of battery management system |
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2018
- 2018-06-05 CN CN201810570154.2A patent/CN108879816A/en active Pending
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| CN2877107Y (en) * | 2006-01-11 | 2007-03-07 | 惠州市蓝微电子有限公司 | Lithium battery charging managing circuit |
| CN205595851U (en) * | 2016-04-26 | 2016-09-21 | 深圳科华鑫电子有限公司 | Lithium batteries ware IC chip |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109546704A (en) * | 2018-11-29 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | A kind of power battery fast charge method |
| CN109888420A (en) * | 2019-02-28 | 2019-06-14 | 深圳猛犸电动科技有限公司 | A kind of charging method, device and the terminal device of lithium ion battery packet |
| CN109888420B (en) * | 2019-02-28 | 2020-11-13 | 深圳猛犸电动科技有限公司 | Charging method and device for lithium ion battery pack and terminal equipment |
| CN111525201A (en) * | 2020-04-28 | 2020-08-11 | 江西凯马百路佳客车有限公司 | Charging control method for new energy vehicle assembled with lithium iron phosphate battery |
| CN111525201B (en) * | 2020-04-28 | 2023-03-14 | 江西凯马百路佳客车有限公司 | Charging control method for new energy vehicle assembled with lithium iron phosphate battery |
| CN114156968A (en) * | 2021-11-03 | 2022-03-08 | 珠海格力电器股份有限公司 | Charging and discharging control method and device of energy storage system, controller and energy storage system |
| CN114156968B (en) * | 2021-11-03 | 2024-06-25 | 珠海格力电器股份有限公司 | Charging and discharging control method and device of energy storage system, controller and energy storage system |
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Application publication date: 20181123 |
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