CN103033753B - One quickly judges ferric phosphate lithium cell or the method for set of cells spray charging precipitator (SoC) - Google Patents
One quickly judges ferric phosphate lithium cell or the method for set of cells spray charging precipitator (SoC) Download PDFInfo
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- CN103033753B CN103033753B CN201110301744.3A CN201110301744A CN103033753B CN 103033753 B CN103033753 B CN 103033753B CN 201110301744 A CN201110301744 A CN 201110301744A CN 103033753 B CN103033753 B CN 103033753B
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- ferric phosphate
- lithium cell
- cells
- phosphate lithium
- manganate battery
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 70
- 239000005955 Ferric phosphate Substances 0.000 title claims abstract description 68
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K Iron(III) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 title claims abstract description 68
- 229940032958 ferric phosphate Drugs 0.000 title claims abstract description 68
- 229910000399 iron(III) phosphate Inorganic materials 0.000 title claims abstract description 68
- 239000007921 spray Substances 0.000 title claims abstract description 27
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims abstract description 54
- 230000005611 electricity Effects 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 4
- 229910052493 LiFePO4 Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- -1 lithium iron Chemical compound 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium Ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003869 coulometry Methods 0.000 description 1
- 230000001066 destructive Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Abstract
The invention discloses the method that one quickly judges ferric phosphate lithium cell (group) spray charging precipitator (SoC), on ferric phosphate lithium cell (group) external circuits, specifically connect what a control circuit realized, including input circuit and output circuit, input circuit includes current amplifier, analog-digital converter, single-chip microcomputer；Output circuit includes relay, lithium manganate battery, load, managing electric quantity IC, switch；When ferric phosphate lithium cell (group) fills (putting) electricity when, input circuit will automatically analyze its current intensity and send instruction, the relay Guan Bi in order output circuit, and lithium manganate battery also fills (putting) electricity with the current intensity specified；The carrying capacity of lithium manganate battery and the linear dependency relation of carrying capacity of ferric phosphate lithium cell (group), accordingly, can be by the detection of the SOC to lithium manganate battery, quickly judge the SoC of ferric phosphate lithium cell (group), it is few that the method for the invention expends the time, accuracy of judgement, quickly, convenient operation.
Description
Technical field
The present invention relates to electrochemical field, particularly relate to one and quickly judge ferric phosphate lithium cell or set of cells
The method of SoC.
Background technology
In recent years, the climate warming problem caused due to energy crisis, especially greenhouse gas emission,
The eco-friendly power source using low emission has had become as an urgent demand.Therefore, the cleaning such as solar energy, wind energy energy
The development and utilization in source has obtained significant progress.But, solar energy, wind power generation etc. are all unstable
The energy, it is achieved the premise generated electricity by way of merging two or more grid systems be solve energy storage problem；And electric automobile because of discharge low (or
Zero-emission), the advantage such as higher energy conversion efficiency, its research and application obtain huge progress, lithium from
Running voltage is high, specific energy density is big, have extended cycle life, self-discharge rate is low, nothing owing to having for sub-battery
Memory effect and the advantage such as environmental pollution is little, first lead at mobile communication equipment, mobile electronic device etc.
Territory obtains huge success, currently to large-scale energy storage device, the expansion of electric automobile field, the whole world
In the range of the development that new forms of energy strategy is power lithium-ion battery provide a unprecedented platform.
LiFePO4 has long circulation life, high security and higher theoretical electrochemistry capacity and becomes
Lithium ion battery used for electric vehicle, the preferable positive electrode of energy-storage battery.Therefore, ferric phosphate lithium cell
Or set of cells has been widely used on energy-storage battery, electrokinetic cell.Electrokinetic cell, energy-storage battery make
During with, obtain accurate state-of-charge, it is possible to effectively avoid overcharge, overdischarge etc. to battery
Destructive procedure, extend battery life, this is accomplished by entering the spray charging precipitator (SoC) of battery at any time
Row monitoring, to ensure set of cells safe operation.But, state-of-charge is the parameter not directly measured,
Electric current, voltage, temperature and other retrievable battery information can only be passed through it is estimated.Due to
Obvious transformation interface, therefore, ferric phosphate lithium cell or battery is there is in LiFePO4 in charge and discharge process
Group charge and discharge process always there will be the longest voltage platform so that ferric phosphate lithium cell or set of cells
The estimation of spray charging precipitator becomes extremely difficult.
At present, obtaining the simplest way of SoC is exactly discharge test completely, but this is a kind of off-line
Method, take considerable time and can change the degree of aging of battery.Currently used has at line method
Ampere-hour coulometry, coupled circuit method, internal resistance measurement method, Kalman filtering method etc., these methods are not only multiple
Miscellaneous and error is the biggest.Therefore, it is badly in need of development one and can quick and precisely judge ferric phosphate lithium cell or electricity
The SoC method of pond group.
The present invention is by being connected built-up circuit by ferric phosphate lithium cell or set of cells with particular electronic component, logical
Cross the regulation of specific electronic component, the electric current flowed through in ferric phosphate lithium cell or set of cells is changed into manganese
Electric current in acid lithium circuit, by the detection of the SoC to lithium manganate battery, it is achieved to ferric phosphate lithium cell
Or the SoC of set of cells quickly judges, expending the time few, it is judged that accurately, quickly, convenient operation, to electricity
Pond does not has any impact.
Summary of the invention
It is an object of the invention to provide one and quickly judge ferric phosphate lithium cell or set of cells spray charging precipitator
(SoC) method, realizes, including defeated by connecting a control circuit circuit on the battery pack
Enter circuit and output circuit；
Described input circuit includes ferric phosphate lithium cell group, current amplifier, analog-digital converter, single-chip microcomputer,
Wherein, ferric phosphate lithium cell group electrically connects with current amplifier, and current amplifier is electrically connected with analog-digital converter
Connecing, analog-digital converter electrically connects with single-chip microcomputer, constitutes an input circuit；
Described output circuit includes relay, lithium manganate battery, load, managing electric quantity IC, switch, its
In, the single-chip microcomputer of described input circuit electrically connects with relay, relay with load electrically connect, load and
Switch electrical connection, switch electrically connects with lithium manganate battery, and lithium manganate battery electrically connects with managing electric quantity IC,
Constitute an output loop；Method particularly includes:
When described ferric phosphate lithium cell or battery power discharge when, it is strong that input circuit automatically analyzes its electric current
Spending and send instruction, the relay Guan Bi in order output circuit, lithium manganate battery is also with certain electric current
Intensity-discharge, detects the SoC of lithium manganate battery by managing electric quantity IC, according to the lotus of lithium manganate battery
Electricity and ferric phosphate lithium cell or the linear relationship of the carrying capacity of set of cells, it can be deduced that LiFePO4
Battery or the SoC of set of cells；
When described ferric phosphate lithium cell or set of cells are charged when, it is strong that input circuit automatically analyzes its electric current
Spending and send instruction, the relay Guan Bi in order output circuit, lithium manganate battery is also with certain electric current
Intensity is charged, and the SoC of lithium manganate battery detected by managing electric quantity IC, according to the lotus of lithium manganate battery
Electricity and ferric phosphate lithium cell or the linear relationship of the carrying capacity of set of cells, it can be deduced that LiFePO4
Battery or the SoC of set of cells.
Alternatively, described ferric phosphate lithium cell or the method for set of cells SoC, described single-chip microcomputer is in work
Time
Can be automatically adjusted according to the capacitance value of the capacitance of ferric phosphate lithium cell group and lithium manganate battery so that phosphorus
The capacitance of acid lithium iron battery group is equal to the integral multiple of the capacitance of lithium manganate battery.
Alternatively, ferric phosphate lithium cell according to claim 1 or the method for set of cells SoC, institute
State carrying capacity and ferric phosphate lithium cell or the linear relationship of the carrying capacity of set of cells of lithium manganate battery
For: spray charging precipitator when ferric phosphate lithium cell or set of cells fill (putting) electricity fills (putting) with lithium manganate battery
Spray charging precipitator during electricity is equal, phosphorus when directly can read electric discharge from controlled circuit in managing electric quantity IC
The spray charging precipitator of acid lithium iron battery group.
In sum, the invention has the beneficial effects as follows, the method overcoming this off-line of discharge test expends
Plenty of time and the degree of aging of battery can be changed, and current complicated in line method operation, error is big
Shortcoming, it is provided that a kind of consuming time is few, it is judged that accurately, quickly, and battery is not had by convenient operation
The determination methods of any impact.
Accompanying drawing explanation
Fig. 1 is the control circuit schematic diagram of the present invention, and wherein Fig. 1-1 is input circuit, and Fig. 1-2 is output
Circuit.
Detailed description of the invention
Embodiment 1:
As it is shown in figure 1,1 is ferric phosphate lithium cell group, 2 is current amplifier, and 3 is analog-digital converter, 4
Being single-chip microcomputer, 5 is relay, and 6 is load, and 7 is switch, and 8 is lithium manganate battery, and 9 is managing electric quantity
IC；A kind of quick judgement ferric phosphate lithium cell of the present invention or the method for set of cells SoC, be to pass through
Connect what a control circuit realized on the battery pack, including input circuit and output circuit；
Described input circuit includes ferric phosphate lithium cell group 1, current amplifier 2, analog-digital converter 3, list
Sheet machine 4；Described output circuit include relay 5, lithium manganate battery 8, load 6, managing electric quantity IC 9,
Switch 7；
Wherein, the effect of current amplifier and analog-digital converter is the total current in analysis controling circuit, and
It is converted into digital signal, and digital signal is passed to single-chip microcomputer；The effect of single-chip microcomputer is to numeral
Signal is analyzed judging, and sends instruction, makes output circuit pass through with certain electric current, and single-chip microcomputer
Operationally automatically can adjust according to the capacitance value of the capacitance of ferric phosphate lithium cell group and lithium manganate battery
Joint so that the capacitance of ferric phosphate lithium cell group is equal to the integral multiple of the capacitance of lithium manganate battery.Relay
Effect be control output circuit work or have a rest；The effect of managing electric quantity IC is detection lithium manganate battery
Spray charging precipitator.
Physical circuit is connected as: by one group of ferric phosphate lithium cell (k cell) by the way of certain
Connecting, the capacity of set of cells is CF, ferric phosphate lithium cell group electrically connects with current amplifier, Current amplifier
Device electrically connects with analog-digital converter, and analog-digital converter electrically connects with single-chip microcomputer, constitutes an input circuit；
The single-chip microcomputer of described input circuit electrically connects with relay, and relay electrically connects with load, loads and switchs
Electrical connection, switch electrically connects with lithium manganate battery, and lithium manganate battery electrically connects with managing electric quantity IC, constitutes
One output loop；Input circuit is by output circuit described in the charge and discharge control of ferric phosphate lithium cell group
The discharge and recharge of lithium manganate battery.
SoC estimation during the electric discharge of ferric phosphate lithium cell group:
When in ferric phosphate lithium cell group and output circuit in input circuit, lithium manganate battery is in full electricity shape
During state, it is assumed that their capacity is respectively CFWith CM.In input circuit, ferric phosphate lithium cell group starts to put
During electricity, the total current intensity in circuit is I, and control circuit starts work simultaneously, and analog-digital converter will input
The electric current of circuit is converted into digital signal and passes to single-chip microcomputer, and single-chip microcomputer sends instruction, makes in output circuit
Lithium manganate battery with I/n, (n is the positive integer more than 1 and nCM>CF) current intensity electric discharge, relay
Receiving rapid closing after the instruction of single-chip microcomputer, lithium manganate battery discharges with the current intensity of I/n.If input
Ferric phosphate lithium cell group discharge time in circuit is t, after electric discharge terminates, and managing electric quantity in output circuit
The spray charging precipitator of IC display lithium manganate battery is SM,Then the spray charging precipitator of ferric phosphate lithium cell group is:
SF=(CF-It)/CF' 100% (1)
The spray charging precipitator of LiMn2O4 phosphorus set of cells is:
(2) formula substitution (1) formula is obtained:
(3) C in formulaF、CM\, n is all it is known that at SMCan pass through under managing electric quantity IC detection case,
Can simply try to achieve SF, and single-chip microcomputer can be according to CF、CMThe size of value regulation n so that CF=nCM,
Then (3) formula can be reduced to:
SF=SM (4)
In sum, LiFePO4 when directly can read electric discharge from output circuit in managing electric quantity IC
The spray charging precipitator S of set of cellsF。
Embodiment 2:
SoC estimation during the charging of ferric phosphate lithium cell group:
Before charging, the switch K in output circuit is turned off state, by lithium manganate battery and phosphoric acid
The charging port of lithium iron battery group all inserts charge power supply, when the total charging current of ferric phosphate lithium cell group is I '
Time, force the lithium manganate battery in output circuit to charge with I '/n current intensity by input circuit, it is assumed that it
Capacity be respectively CF' and CM′.When in input circuit, ferric phosphate lithium cell group starts to charge up, in circuit
Total current intensity be I ', control circuit starts work simultaneously, and the electric current of control circuit is turned by analog-digital converter
Changing digital signal into and pass to single-chip microcomputer, single-chip microcomputer sends instruction, makes the lithium manganate battery in output circuit
With I '/n, (n is the positive integer more than 1 and nCM′>CF') current intensity charging, relay receives monolithic
Rapid closing after the instruction of machine, lithium manganate battery charges with the current intensity of I '/n.If the phosphorus in input circuit
The acid lithium iron battery group charging interval is t ', and after charging terminates, in input circuit, ferric phosphate lithium cell group is charged
Conservation rate is SF', in output circuit, the spray charging precipitator of managing electric quantity IC display lithium manganate battery is SM′,
Estimating method is with embodiment 1.
In sum, LiFePO4 electricity when directly can read charging from output circuit in managing electric quantity IC
The spray charging precipitator S of pond groupF′。
The technical scheme provided the embodiment of the present invention above is described in detail, used herein
Principle and the embodiment of the embodiment of the present invention are set forth by specific case, saying of above example
The bright principle being only applicable to help to understand the embodiment of the present invention；General technology people simultaneously for this area
Member, according to the embodiment of the present invention, all will change in detailed description of the invention and range of application,
In sum, this specification content should not be construed as limitation of the present invention.
Claims (3)
1. quick judgement ferric phosphate lithium cell or a method for set of cells spray charging precipitator (SoC), realizes, including input circuit and output circuit by connecting a control circuit on the battery pack, it is characterised in that:
Described input circuit includes ferric phosphate lithium cell or set of cells, current amplifier, analog-digital converter, single-chip microcomputer, wherein, ferric phosphate lithium cell or set of cells electrically connect with current amplifier, current amplifier electrically connects with analog-digital converter, analog-digital converter electrically connects with single-chip microcomputer, constitutes an input circuit；
Described output circuit includes relay, lithium manganate battery, load, managing electric quantity IC, switch, wherein, the single-chip microcomputer of described input circuit electrically connects with relay, relay electrically connects with load, load and electrically connect with switch, switch electrically connects with lithium manganate battery, and lithium manganate battery electrically connects with managing electric quantity IC, constitutes an output loop；
Described one quickly judges ferric phosphate lithium cell or the method for set of cells spray charging precipitator (SoC), particularly as follows: when described ferric phosphate lithium cell or battery power discharge when, input circuit automatically analyzes its current intensity and sends instruction, relay Guan Bi in order output circuit, lithium manganate battery is also with certain current intensity electric discharge, the SoC of lithium manganate battery is detected by managing electric quantity IC, carrying capacity according to lithium manganate battery and ferric phosphate lithium cell or the linear relationship of the carrying capacity of set of cells, it can be deduced that ferric phosphate lithium cell or the SoC of set of cells；
Described one quickly judges ferric phosphate lithium cell or the method for set of cells spray charging precipitator (SoC), particularly as follows: when described ferric phosphate lithium cell or set of cells are charged when, input circuit automatically analyzes its current intensity and sends instruction, relay Guan Bi in order output circuit, lithium manganate battery is also with certain current intensity charging, the SoC of lithium manganate battery is detected by managing electric quantity IC, carrying capacity according to lithium manganate battery and ferric phosphate lithium cell or the linear relationship of the carrying capacity of set of cells, it can be deduced that ferric phosphate lithium cell or the SoC of set of cells.
Ferric phosphate lithium cell the most according to claim 1 or the method for set of cells spray charging precipitator (SoC), it is characterized in that: described single-chip microcomputer is operationally automatically adjusted according to the capacitance value of ferric phosphate lithium cell or the capacitance of set of cells and lithium manganate battery so that the capacitance of ferric phosphate lithium cell or set of cells is equal to the integral multiple of the capacitance of lithium manganate battery.
Ferric phosphate lithium cell the most according to claim 1 or the method for set of cells spray charging precipitator (SoC), it is characterized in that: the carrying capacity of described lithium manganate battery with the linear relationship of ferric phosphate lithium cell or the carrying capacity of set of cells is: when the lithium manganate battery in output circuit is equal to n times of lithium manganate battery capacitance with the capacitance of I '/n current intensity charging and ferric phosphate lithium cell or set of cells, wherein, I ' is the total charging current of ferric phosphate lithium cell or set of cells, n is the positive integer more than 1, spray charging precipitator when spray charging precipitator when ferric phosphate lithium cell or set of cells charging charges with lithium manganate battery is equal, ferric phosphate lithium cell or the spray charging precipitator of set of cells when directly can read charging from controlled circuit in managing electric quantity IC；The carrying capacity of described lithium manganate battery with the linear relationship of ferric phosphate lithium cell or the carrying capacity of set of cells is: when the lithium manganate battery in output circuit is equal to n times of lithium manganate battery capacitance with the capacitance of I '/n current intensity electric discharge and ferric phosphate lithium cell or set of cells, spray charging precipitator when spray charging precipitator when ferric phosphate lithium cell or battery power discharge discharges with lithium manganate battery is equal, ferric phosphate lithium cell or the spray charging precipitator of set of cells when directly can read electric discharge from controlled circuit in managing electric quantity IC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110301744.3A CN103033753B (en) | 2011-10-09 | One quickly judges ferric phosphate lithium cell or the method for set of cells spray charging precipitator (SoC) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110301744.3A CN103033753B (en) | 2011-10-09 | One quickly judges ferric phosphate lithium cell or the method for set of cells spray charging precipitator (SoC) |
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| CN103033753A CN103033753A (en) | 2013-04-10 |
| CN103033753B true CN103033753B (en) | 2016-11-30 |
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