CN109245252B - The non-linear temperature compensation method of battery charging voltage - Google Patents
The non-linear temperature compensation method of battery charging voltage Download PDFInfo
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- CN109245252B CN109245252B CN201811534755.4A CN201811534755A CN109245252B CN 109245252 B CN109245252 B CN 109245252B CN 201811534755 A CN201811534755 A CN 201811534755A CN 109245252 B CN109245252 B CN 109245252B
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- H02J7/0091—
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- 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
- H01M10/443—Methods for charging or discharging in response to temperature
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- 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
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- 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
Abstract
The present invention relates to a kind of non-linear temperature compensation methods of battery charging voltage, include the following steps A: measuring the actual temperature T of battery.Step B1, when 25 DEG C≤T≤50 DEG C, according to formula V=1/12500*T2- 1/125*T+2.4 charges to battery；B2, when 25 DEG C of -20 DEG C≤T <, according to formula V=- 4/90000*T2- 160/90000*T+209/90 charges to battery.The present invention solves the problems, such as puzzlement battery charging all the time: how neither charge less is not electric again for overcharge, and battery is allowed to reach best charge state.
Description
Technical field
The invention belongs to accumulator charging technology fields, and in particular to a kind of nonlinear temperature benefit of battery charging voltage
Compensation method.
Background technique
Battery charging is an electrochemical reaction, and chemical reaction is in close relations with temperature change, and battery is in difference
Temperature needs different charging voltages, how to solve the problems, such as this, and charging industry is always in exploration.
At present the same industry changes linear regulation charging voltage according to battery temp using linear compensation method.
Typically: on the basis of 25 DEG C, temperature is every to increase 1 DEG C of even charging voltage reduction 4mV, and float charge voltage reduces 3mV；The every reduction of temperature
1 DEG C of even charging voltage increases 4mV, and float charge voltage increases 3mV.See Fig. 1 linear compensation voltage-temperature curve synoptic diagram.In fact it fills
The variation invariant with temperature and linear of electrochemical reaction in electricity.If only linear compensation, effect, or meeting is not achieved
There is overcharge or charge less electrical phenomena, in fact now battery often there is overcharge bulge or charge less capacitance not
Phenomena such as sufficient, can all shorten service lifetime of accumulator.
Summary of the invention
The purpose of the invention is to overcome the deficiencies of the prior art and provide the non-thread of the new battery charging voltage of one kind
Property temperature-compensation method.
The present invention is achieved by the following technical programs:
A kind of non-linear temperature compensation method of battery charging voltage, comprising the following steps:
Step A: determining battery benchmark float charge voltage, fiducial temperature first, then measures the actual temperature T of battery,
Segmentation partition is carried out to actual temperature T, in different area segments, penalty coefficient is carried out battery non-depending on the temperature
Linear temperature compensation.
Step B: when battery benchmark float charge voltage is 2.25 volts, fiducial temperature is 25 DEG C, this battery benchmark is floating
Charging voltage, fiducial temperature adapt to national most area and most of battery types, then according to the actual temperature value of T point with
Lower four kinds of different situations carry out temperature-compensating to charging voltage.
B1, when 25 DEG C≤T≤50 DEG C:
Temperature compensation coefficient is -4mv/(DEG C of monomers at 25 DEG C), temperature compensation coefficient is 0/(DEG C of monomer at 50 DEG C),
During 25 DEG C ~ 50 DEG C, temperature compensation coefficient is from -4/(DEG C of monomers) change to 0/(DEG C of monomer), it then follows formula 1:K=
(50-T)/25*K25.In formula 1, K is temperature compensation coefficient, K25- 4mv/(DEG C of monomers of temperature compensation coefficient when being 25 DEG C), T
For battery actual measurement temperature (between 25 DEG C ~ 50 DEG C), the relationship between temperature compensation coefficient K and temperature T is shown in Fig. 3 25 DEG C
~ 50 DEG C of parts.
Temperature compensation coefficient K when 25 DEG C25For -4mv/(DEG C of monomers), by anti-ballistic (indefinite integral) mathematical operation,
Obtain formula 2:V=1/12500*T2- 1/125*T+2.4, formula 2 are the electric power storage between 25 DEG C ~ 50 DEG C after non-linear temperature compensation
Pond charging voltage-temperature relation is shown in 25 DEG C ~ 50 DEG C parts in Fig. 2.
With temperature compensation coefficient K at 25 DEG C25Formula is obtained by anti-ballistic (indefinite integral) mathematical operation for UNIVERSAL COEFFICIENT
3:V=- K25/50* T2+2* K25* T+(2.25-37.5* K25).Between formula 3 i.e. 25 DEG C ~ 50 DEG C after non-linear temperature compensation
Battery charging voltage-temperature relation.
B2, when 25 DEG C of -20 DEG C≤T <, according to formula V=- 4/90000*T2- 160/90000*T+209/90 is calculated
Voltage V charges to battery according to V value；
At 25 DEG C, temperature compensation coefficient is -4mv/(DEG C of monomers), temperature compensation coefficient is 0/(DEG C of list at -20 DEG C
Body), during 25 DEG C ~ -20 DEG C, temperature compensation coefficient is from -4/(DEG C of monomers) change to 0/(DEG C of monomer), it then follows formula 4:
K=(20+T)/45* K25, wherein K is temperature compensation coefficient, K25Temperature compensation coefficient when being 25 DEG C: -4mv/(DEG C of monomers),
T is battery actual measurement temperature (between 25 DEG C ~ -20 DEG C).See 25 DEG C ~ -20 DEG C parts in Fig. 3.
If temperature compensation coefficient K at 25 DEG C25By -4mv/(DEG C of monomers), it is transported by anti-ballistic (indefinite integral) mathematics
It calculates, obtains formula 5:V=- 4/90000* T2-160/90000*T+209/90.Formula 5 is non-thread warm-natured between 25 DEG C ~ -20 DEG C
Spend compensated battery charging voltage-temperature relation, K25By -4mv/(DEG C of monomers), see 25 DEG C ~ -20 DEG C parts in Fig. 2.
With temperature compensation coefficient K at 25 DEG C25Public affairs are obtained by anti-ballistic (indefinite integral) mathematical operation for UNIVERSAL COEFFICIENT
Formula 6:V=K25/90* T2+4/9* K25* T+(2.25-325/18* K25).Formula 6 is nonlinear temperature between 25 DEG C ~ 50 DEG C
Compensated battery charging voltage-temperature relation.
B3, when 50 DEG C of T >, temperature compensation coefficient is 0/(DEG C of monomer), charging voltage is equal to 50 DEG C at 50 DEG C or more
When charging voltage, no longer change, if temperature compensation coefficient K at 25 DEG C25By -4mv/(DEG C of monomers), according to formula V=1/
12500*502- 1/125*50+2.4 calculates voltage V=2.2 volt/monomer, charges according to V value to battery, see Fig. 2,
50 DEG C of above sections in Fig. 3.
With temperature compensation coefficient K at 25 DEG C25For UNIVERSAL COEFFICIENT, by formula V=- K25/50* T2+2* K25* T+(2.25-
37.5* K25)=- K25/50* 502+2* K25* 50+(2.25-37.5* K25)=2.25+12.5*K25, this i.e. 50 DEG C or more
Battery charging voltage after non-linear temperature compensation.
B4, when < -20 DEG C of T, temperature compensation coefficient is 0/(DEG C of monomer), charging voltage is equal to -20 at -20 DEG C or less
DEG C when charging voltage, no longer change, according to formula V=- 4/90000*202+ 160/90000*20+209/90 calculates voltage
V=2.34 volt/monomer charge to battery according to V value, see -20 DEG C or less parts in Fig. 2 and Fig. 3.
With temperature compensation coefficient K at 25 DEG C25For UNIVERSAL COEFFICIENT, by formula V=K25/90* T2+4/9* K25* T+(2.25-
325/18* K25)=K25/ 90*(-20)2+4/9* K25* (- 20)+(2.25-325/18* K25)=2.25-22.5*K25, this i.e.-
Battery charging voltage after 20 DEG C and following non-linear temperature compensation.
When battery benchmark float charge voltage is 2.25 volts, fiducial temperature is 20 DEG C, then according to the actual temperature value of T point
The different situation of following four carries out temperature-compensating to charging voltage:
When 20 DEG C≤T≤50 DEG C, according to formula K=(50-T)/30*K20With reference voltage 2.25V, obtain non-thread warm-natured
Spend compensated battery charging voltage-temperature relation formula V=1/15000*T2- 1/150*T+2.3567 calculates voltage
V charges to battery according to V value；Wherein, K is temperature compensation coefficient, K20Temperature compensation coefficient when being 20 DEG C；
When 20 DEG C of -20 DEG C≤T <, according to formula according to formula K=(20+T)/40*K20With reference voltage 2.25V, obtain
Battery charging voltage-temperature relation formula V=- 1/20000*T after non-linear temperature compensation2- 1/500*T+2.31 is calculated
Voltage V out charges to battery according to V value；Wherein, K is temperature compensation coefficient, K20Temperature compensation coefficient when being 20 DEG C；
When 50 DEG C of T >, temperature compensation coefficient K=0, according to formula V=1/15000*502- 1/150*50+2.3567, meter
Voltage V=2.19 volt/monomer is calculated, is charged according to V value to battery；
When < -20 DEG C of T, temperature compensation coefficient K=0, according to formula V=- 1/20000*202+ 1/500*20+2.31, meter
Voltage V=2.33 volt/monomer is calculated, is charged according to V value to battery.
When battery benchmark float charge voltage is 2.29 volts, fiducial temperature is 25 DEG C, then according to the actual temperature value of T point
The different situation of following four carries out temperature-compensating to charging voltage:
When 25 DEG C≤T≤50 DEG C, according to formula K=(50-T)/25*K25With reference voltage 2.29V, obtain non-thread warm-natured
Spend compensated battery charging voltage-temperature relation formula V=1/12500*T2- 1/125*T+2.4+(2.29-2.25), meter
Voltage V is calculated, is charged according to V value to battery；
When 25 DEG C of -20 DEG C≤T <, according to formula K=(20+T)/45*K25With reference voltage 2.29V, obtain non-thread warm-natured
Spend compensated battery charging voltage-temperature relation formula V=- 4/90000*T2-160/90000*T+209/90+
(2.29-2.25) calculates voltage V, charges according to V value to battery；
When 50 DEG C of T >, temperature compensation coefficient K=0, according to formula V=1/12500*502- 1/125*50+2.4+(2.29-
2.25) voltage V=2.24 volt/monomer, is calculated, is charged according to V value to battery；
When < -20 DEG C of T, temperature compensation coefficient K=0, according to formula V=- 4/90000*202+160/90000*20+209/
90+(2.29-2.25), voltage V=2.38 volt/monomer is calculated, is charged according to V value to battery.
Beneficial effects of the present invention are as follows:
In YD/T 799-2010 " communication valve controlled sealed lead-acid accumulator " standard 6.13, there is the following contents: ring
At 25 DEG C of border temperature, battery floating charge voltage is (2.20V-2.27 volt)/monomer.Battery charging temperature penalty coefficient is answered
For (- 3mV ~ -7mV)/DEG C monomer.In the industry, for the fiducial temperature that general line compensation uses for 25 DEG C, battery benchmark is floating
Charging voltage is 2.25 volts/monomer.My company is studied by many years, long-term a large number of experiments, and screens to experimental data, finds
Optimal criteria numerical value: 25 DEG C of fiducial temperature；Benchmark float charge voltage is 2.25 volts/monomer；Fiducial temperature penalty coefficient be (- 4mV)/
DEG C monomer.Using said reference numerical value, with battery charge characteristic good match, charging effect is good, has extended cycle life.
During the charging process, temperature is different, and corresponding charge parameter such as voltage, electric current is also different for battery of the present invention, because
This need to be according to battery temp, to adjust charging voltage, i.e. temperature-compensating.The present invention is a kind of non-linear temperature compensation method,
It can carry out Nonlinear Adjustment charging voltage according to battery electrochemical reaction with the nonlinear change of temperature, fundamentally solve
Charging temperature compensation problem solves the problems, such as puzzlement battery charging all the time: how neither charge less is not electric again for overcharge,
Battery is allowed to reach best charge state.
Detailed description of the invention
Fig. 1 is linear compensation voltage-temperature curve synoptic diagram.
Nonlinear compensation voltage-temperature curve when Fig. 2 is 2.25 volts of battery benchmark float charge voltage, 25 DEG C of fiducial temperature
Figure.
Nonlinear compensation coefficient-temperature signal when Fig. 3 is 2.25 volts of battery benchmark float charge voltage, 25 DEG C of fiducial temperature
Figure.
Nonlinear compensation voltage-temperature curve when Fig. 4 is 2.25 volts of battery benchmark float charge voltage, different fiducial temperatures
Group's schematic diagram.
Nonlinear compensation voltage-temperature group of curves signal when Fig. 5 is different benchmark float charge voltages, 25 DEG C of fiducial temperature
Figure.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.
A kind of non-linear temperature compensation method of battery charging voltage, comprising the following steps:
Step A: determining battery benchmark float charge voltage, fiducial temperature first, then measures the actual temperature T of battery,
Non-linear temperature compensation is carried out to battery further according to battery benchmark float charge voltage, fiducial temperature, the actual temperature value of T.
Step B: taking battery benchmark float charge voltage is 2.25 volts, fiducial temperature is 25 DEG C, according to the temperature value of T, point with
Lower four kinds of different situations carry out temperature-compensating to charging voltage:
B1, when 25 DEG C≤T≤50 DEG C, according to formula V=1/12500*T2- 1/125*T+2.4 calculates voltage V, presses
It charges according to V value to battery.
B2, when 25 DEG C of -20 DEG C≤T <, according to formula V=- 4/90000*T2- 160/90000*T+209/90 is calculated
Voltage V charges to battery according to V value.
B3, when 50 DEG C of T >, according to formula V=1/12500*502- 1/125*50+2.4 calculates voltage V=2.2, presses
It charges according to V value to battery.
B4, when < -20 DEG C of T, according to formula V=- 4/90000*202+ 160/90000*20+209/90 calculates voltage
V=2.34 volt/monomer charge to battery according to V value.
By taking GFM-100Ah battery as an example, when the actual temperature T for measuring battery is -20 DEG C, according to above-mentioned non-thread
Property compensation formula V=- 4/90000*T2- 160/90000*T+209/90 is calculated, and V=2.34 volt/monomer is obtained, according to biography
The linear compensation of system then V=2.43 volt/monomer compares test, surveys discharge capacity and cycle-index data, see the table below 1.
The accumulator property contrast table of temperature-compensating is carried out when table 1 is -20 DEG C by linear and nonlinear
At -20 DEG C, charging voltage presses 2.43 volts/monomer of linear compensation, and 2.34 volts/monomer of nonlinear compensation carries out pair
Than test, as it can be seen from table 1 cycle-index only has 353 times when linear compensation, cycle-index reaches 435 when nonlinear compensation
It is secondary, illustrate that linear compensation effect does not have nonlinear compensation effect good.
By taking GFM-100Ah battery as an example, when the actual temperature T for measuring battery is 50 DEG C, according to above-mentioned non-linear
Compensation formula V=1/12500*T2- 1/125*T+2.4 is calculated, and obtains V=2.20 volt/monomer, according to traditional linear benefit
Then V=2.15 volt/monomer is repaid, test is compared, discharge capacity and cycle-index data is surveyed, see the table below 2.
The accumulator property contrast table of temperature-compensating is carried out when table 2 is 50 DEG C by linear and nonlinear
At 50 DEG C, charging voltage presses 2.15 volts/monomer of linear compensation, and 2.20 volts/monomer of nonlinear compensation compares
Test, from table 2 it can be seen that cycle-index only has 362 times when linear compensation, cycle-index reaches 441 times when nonlinear compensation,
Illustrate that linear compensation effect does not have nonlinear compensation effect good.
Embodiment described above is only the preferred embodiment of the present invention, generally with 25 DEG C for benchmark temperature, for difference
Battery or different areas, fiducial temperature may be different, to nonlinear compensation derived from different fiducial temperatures and non-
Linear group, also in the scope of the present invention, such as following several situations:
The present invention is by taking 25 DEG C of fiducial temperatures as an example, and for different batteries or different areas, fiducial temperature may not
Together.Such as it for not having air-conditioned torrid areas, needs using high temperature battery；For not having air-conditioned refrigerant latitudes, need
Use low-temperature storage battery.In this case, fiducial temperature is no longer 25 DEG C, thus generated nonlinear compensation, as shown in Figure 4
2.25 volts of battery benchmark float charge voltage, different fiducial temperature when nonlinear compensation voltage-temperature group of curves, also in this hair
In bright protection scope.
When fiducial temperature is no longer 25 DEG C, but becomes 20 DEG C, the compensated curve in Fig. 4 is moved to the left, corresponding to compensate
Method is as follows:
When 20 DEG C≤T≤50 DEG C, according to formula K=(50-T)/30*K20With reference voltage 2.25V, obtain non-thread warm-natured
Spend compensated battery charging voltage-temperature relation formula V=1/15000*T2- 1/150*T+2.3567 calculates voltage
V charges to battery according to V value；Wherein, K is temperature compensation coefficient, K20Temperature compensation coefficient when being 20 DEG C；When -20 DEG C
At 20 DEG C of≤T <, according to formula according to formula K=(20+T)/40*K20With reference voltage 2.25V, non-linear temperature compensation is obtained
Battery charging voltage afterwards-temperature relation formula V=- 1/20000*T2- 1/500*T+2.31 calculates voltage V, according to V
Value charges to battery；Wherein, K is temperature compensation coefficient, K20Temperature compensation coefficient when being 20 DEG C；When 50 DEG C of T >, temperature
Penalty coefficient K=0 is spent, according to formula V=1/15000*502- 1/150*50+2.3567 calculates voltage V=2.19 volt/monomer,
It charges according to V value to battery；When < -20 DEG C of T, temperature compensation coefficient K=0, according to formula V=- 1/20000*202+
1/500*20+2.31 calculates voltage V=2.33 volt/monomer, charges according to V value to battery.
General benchmark float charge voltage is 2.25 volts, the battery such as rail traffic of different application is used, benchmark
Voltage is 2.29 volts, to nonlinear compensation derived from different reference voltages, different benchmark float charge voltages as shown in Figure 5,
Nonlinear compensation voltage-temperature group of curves at 25 DEG C of fiducial temperature, also in the scope of the present invention.
When benchmark float charge voltage is no longer 2.25 volts, but becomes 2.29 volts, Fig. 5 curve is moved up, corresponding to compensate
Method is as follows:
When 25 DEG C≤T≤50 DEG C, according to formula K=(50-T)/25*K25With reference voltage 2.29V, obtain non-thread warm-natured
Spend compensated battery charging voltage-temperature relation formula V=1/12500*T2- 1/125*T+2.4+(2.29-2.25), meter
Voltage V is calculated, is charged according to V value to battery；When 25 DEG C of -20 DEG C≤T <, according to formula K=(20+T)/45*K25With
Reference voltage 2.29V, battery charging voltage-temperature relation formula V=- 4/90000* after obtaining non-linear temperature compensation
T2- 160/90000*T+209/90+(2.29-2.25), voltage V is calculated, is charged according to V value to battery；
When 50 DEG C of T >, temperature compensation coefficient K=0, according to formula V=1/12500*502- 1/125*50+2.4+(2.29-
2.25) voltage V=2.24 volt/monomer, is calculated, is charged according to V value to battery；When < -20 DEG C of T, temperature-compensating system
Number K=0, according to formula V=- 4/90000*202+ 160/90000*20+209/90+(2.29-2.25), calculate voltage V=2.38
Volt/monomer charges to battery according to V value.
It should be pointed out that there are many more the available prior arts of the various schemes being not known to be realized in the present embodiment, it is right
For those skilled in the art, under the premise of not departing from technical solution of the present invention, several improvement can also be made
And modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (3)
1. the non-linear temperature compensation method of battery charging voltage, it is first determined battery benchmark float charge voltage, fiducial temperature,
Then the actual temperature T for measuring battery, carries out segmentation partition to actual temperature T, in different area segments, according to different
Temperature compensation coefficient carries out non-linear temperature compensation to battery, it is characterised in that:
When battery benchmark float charge voltage is 2.25 volts, fiducial temperature is 25 DEG C, then according to actual temperature value point of T or less
Four kinds of different situations carry out temperature-compensating to charging voltage:
B1, when 25 DEG C≤T≤50 DEG C, according to formula K=(50-T)/25*K25With reference voltage 2.25V, nonlinear temperature is obtained
Compensated battery charging voltage-temperature relation formula V=1/12500*T2- 1/125*T+2.4 calculates voltage V, according to
V value charges to battery；Wherein, K is temperature compensation coefficient, K25Temperature compensation coefficient when being 25 DEG C；
B2, when 25 DEG C of -20 DEG C≤T <, according to formula K=(20+T)/45*K25With reference voltage 2.25V, obtain non-thread warm-natured
Spend compensated battery charging voltage-temperature relation formula V=- 4/90000*T2- 160/90000*T+209/90 is calculated
Voltage V out charges to battery according to V value；Wherein, K is temperature compensation coefficient；K25Temperature compensation coefficient when being 25 DEG C；
B3, when 50 DEG C of T >, temperature compensation coefficient K=0, according to formula V=1/12500*502- 1/125*50+2.4 calculates electricity
V=2.2 volt/monomer is pressed, is charged according to V value to battery；
B4, when < -20 DEG C of T, temperature compensation coefficient K=0, according to formula V=- 4/90000*202+160/90000*20+209/
90, voltage V=2.34 volt/monomer is calculated, is charged according to V value to battery.
2. the non-linear temperature compensation method of battery charging voltage according to claim 1, it is characterised in that: work as electric power storage
When pond benchmark float charge voltage is 2.25 volts, fiducial temperature is 20 DEG C, then divide following four different according to the actual temperature value of T
Situation carries out temperature-compensating to charging voltage:
When 20 DEG C≤T≤50 DEG C, according to formula K=(50-T)/30*K20With reference voltage 2.25V, nonlinear temperature benefit is obtained
Battery charging voltage-temperature relation formula V=1/15000*T after repaying2- 1/150*T+2.3567 calculates voltage V, presses
It charges according to V value to battery；Wherein, K is temperature compensation coefficient, K20Temperature compensation coefficient when being 20 DEG C；
When 20 DEG C of -20 DEG C≤T <, according to formula K=(20+T)/40*K20With reference voltage 2.25V, nonlinear temperature benefit is obtained
Battery charging voltage-temperature relation formula V=- 1/20000*T after repaying2- 1/500*T+2.31 calculates voltage V, according to
V value charges to battery；Wherein, K is temperature compensation coefficient, K20Temperature compensation coefficient when being 20 DEG C；
When 50 DEG C of T >, temperature compensation coefficient K=0, according to formula V=1/15000*502- 1/150*50+2.3567 calculates electricity
V=2.19 volt/monomer is pressed, is charged according to V value to battery；
When < -20 DEG C of T, temperature compensation coefficient K=0, according to formula V=- 1/20000*202+ 1/500*20+2.31 calculates electricity
V=2.33 volt/monomer is pressed, is charged according to V value to battery.
3. the non-linear temperature compensation method of battery charging voltage according to claim 1, it is characterised in that: work as electric power storage
When pond benchmark float charge voltage is 2.29 volts, fiducial temperature is 25 DEG C, then divide following four different according to the actual temperature value of T
Situation carries out temperature-compensating to charging voltage:
When 25 DEG C≤T≤50 DEG C, according to formula K=(50-T)/25*K25With reference voltage 2.29V, nonlinear temperature benefit is obtained
Battery charging voltage-temperature relation formula V=1/12500*T after repaying2- 1/125*T+2.4+(2.29-2.25), it calculates
Voltage V charges to battery according to V value；
When 25 DEG C of -20 DEG C≤T <, according to formula K=(20+T)/45*K25With reference voltage 2.29V, nonlinear temperature benefit is obtained
Battery charging voltage-temperature relation formula V=- 4/90000*T after repaying2- 160/90000*T+209/90+(2.29-
2.25) voltage V, is calculated, is charged according to V value to battery；
When 50 DEG C of T >, temperature compensation coefficient K=0, according to formula V=1/12500*502- 1/125*50+2.4+(2.29-
2.25) voltage V=2.24 volt/monomer, is calculated, is charged according to V value to battery；
When < -20 DEG C of T, temperature compensation coefficient K=0, according to formula V=- 4/90000*202+160/90000*20+209/90+
(2.29-2.25) calculates voltage V=2.38 volt/monomer, charges according to V value to battery.
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