CN103972965B - A kind of dynamic conditioning type battery pack active equalization method - Google Patents
A kind of dynamic conditioning type battery pack active equalization method Download PDFInfo
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Abstract
A kind of dynamic conditioning type battery pack active equalization method, battery power discharge also builds cell electric discharge d%-Vdkx curve; Batteries charging also builds cell charging c%-Vckx curve; Equilibrium is started when certain cell capacity discharges into setting capacity; M the cell minimum to floating voltage charges, until floating voltage reaches mean value; Judging whether cell floating voltage extreme difference is less than set point, is then discharge off; Battery pack starts charging; Measure the monomer battery voltage removing internal resistance dividing potential drop, and calculate floating voltage; When certain cell capacity is charged to setting capacity, start balanced; M the cell minimum to floating voltage charges, until floating voltage reaches mean value; Judge whether cell floating voltage extreme difference is less than set point, is, charges complete.The characteristic of each monomer is analyzed on dynamic ground, during battery power discharge, precisely efficiently the energy supplement of the battery core of high power capacity is given the battery core of low appearance.
Description
Technical field
The present invention relates to battery pack balancing technology, especially a kind of dynamic conditioning type battery pack active equalization method.
Background technology
The balance policy of the passive dissipative type of most employing improves the consistency of lithium battery on the market at present.But this technology caloric value is large, euqalizing current is little and the waste energy content of battery, and can not play the effect of learning from other's strong points to offset one's weaknesses, make the monomer battery core of high electricity in battery pack not give full play to capacity, the capacity of whole battery pack depends on the monomer battery core of minimum capacity.Part active equalization technology is also immature, can not be made full use of by energy more than needed very accurately very in time.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of dynamic conditioning type battery pack active equalization method, and the characteristic of each monomer is analyzed on dynamic ground, during battery power discharge, precisely efficiently the energy supplement of the monomer battery core of high power capacity is given the monomer battery core of low appearance; During batteries charging, the energy of the battery core precisely low appearance be first full of efficiently moves the battery core be full of to Gao Ronghou, make the battery pack core that respectively economizes on electricity accomplish to exhaust simultaneously and be full of simultaneously, thus realize the effect of learning from other's strong points to offset one's weaknesses that high efficiency is moved and loss is minimum, promote battery pack whole volume.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of dynamic conditioning type battery pack active equalization method, and it comprises transformer based on the circuit realized, and described transformer comprises a main coil and n secondary coil, n >=3; Each secondary coil correspondence is connected with a cell, and described cell is composed in series battery pack, and utilize the electric energy of battery pack to carry out supplementary electric method to wherein m cell and comprise the following steps, m≤n/3, wherein m is integer;
(1) battery pack starts initial alignment:
(2) cell is full of and the floating voltage of detection record cell;
(3) battery pack constant-current discharge, detects electric current and calculates discharge capacity;
(4) record monomer battery discharge and be with live pressure instantaneously;
(5) calculate and record internal resistance of single cell DCR;
(6) monomer battery voltage and capacity is recorded at set intervals until discharge off;
(7) cell electric discharge d%-Vdkx curve is built;
(8) battery pack starts charging;
(9) voltage of cell and capacity is recorded at set intervals until charge complete;
(10) cell charging c%-Vckx curve is built;
(11) battery pack primary data is demarcated complete;
(12) normally use and record cell floating voltage;
(13) battery power discharge, survey calculation internal resistance of single cell DCR and discharge capacity;
(14) measure monomer battery voltage, and remove internal resistance dividing potential drop to calculate floating voltage;
(15) when battery power discharge is greater than 20mV opens during failure state to setting capacity, floating voltage Vdkx extreme difference and system does not break down balanced;
(16) m the cell that floating voltage is minimum is charged, until floating voltage reaches mean value;
(17) judging whether cell floating voltage extreme difference is less than set point, otherwise continue balanced, is stop equilibrium, until discharge off;
(18) battery pack starts charging and survey calculation charged electrical capacity;
(19) measure monomer battery voltage, and remove internal resistance dividing potential drop to calculate floating voltage;
(20) when batteries charging is greater than 20mV opens during failure state to setting capacity, floating voltage Vdkx extreme difference and system does not break down balanced;
(21) m the cell that floating voltage is minimum is charged, until floating voltage reaches mean value;
(22) judging whether cell floating voltage extreme difference is less than set point, otherwise continue balanced, is stop equilibrium, until it is complete to charge;
As improvement, when each electric discharge moment and electric current are more than or equal to 0.1C, according to the difference Δ V/ electric current I=internal resistance of single cell DCR of transient voltage after voltage before cell electric discharge and electric discharge.
As improvement, according to constant-current discharge mode detection initial discharge character voltage Vdx and " real-time current I-time Δ t " data, integration ∫ Idt calculates and puts capacity C d again, until electric discharge terminates, record first minimum cell discharge capacity Cd0min, percent of discharge d%=Cd/Cd0min, after the voltage Vdx compensation internal resistance dividing potential drop I*DCR of the detection in corresponding stored moment, obtain cell electric discharge floating voltage Vdkx, and " the unloaded character voltage Vdkx of percent of discharge d%-" diagram database is built in memory with percent of discharge d%, now discharge data library initialization is complete.
As improvement, when electric discharge uses, discharge capacity Cd and inquiry discharge data storehouse floating voltage Vdkx correspondence put volume percent d% to calculate reality according to detection data integrate, calculate each cell real surplus capacity SOC=Cd/d%-Cd, thus learn that a few joint cell SOC is minimum, when reaching balanced unlocking condition, supplementary electrical equalization is carried out to it.
As improvement, primary charging character voltage Vcx and " real-time current I-time Δ t " data are detected according to constant current charging mode, integration ∫ Idt calculates and fills capacity C c again, until charging terminates, record first minimum monomer charging capacity Cc0min, charge percentage c%=Cc/Cc0min, after the voltage Vcx compensation internal resistance dividing potential drop I*DCR of the detection in corresponding stored moment, obtain monomer charging floating voltage Vckx, and " the unloaded character voltage Vckx of charge percentage c%-" diagram database is built in memory with charge percentage c%, now charge data library initialization is complete.
As improvement, when charging uses, charging capacity Cc and inquiry charge data storehouse floating voltage Vckx correspondence fill volume percent c% to calculate reality according to detection data integrate, calculate each joint cell capacity SOB=Cc/c%-Cc actual to be filled, thus learn that a few joint cell SOB is minimum, when reaching balanced unlocking condition, supplementary electrical equalization is carried out to it.
As improvement, Lz serves as theme the circle number of turns, and secondary coil number of turns Lx=1.3Lz/n, monomer charge coil floating voltage Vxmax=1.3VDD/n, make often to save cell and can reach enough charging voltages and charging current, guarantee equalization efficiency and voltage controlled.
As improvement, main coil current Iz is recorded jointly by the RC filter circuit of inspection leakage resistance R2, scaling circuit and resistance R1, electric capacity C1 composition, secondary current is Ix, voltage is Vx, simultaneously balanced monomer number is m, according to conservation of energy principle, ignore the dissipation loss in loop, balanced energy
during equalizing charge, Vx equals monomer battery core both end voltage Vcell, thus can obtain each monomer average voltage Vavg and average electric current I avg.
As improvement, according to the PWM duty ratio of each cell SOC and SOB and extreme difference size dynamic conditioning CtrZ thereof, thus have adjusted monomer equalizing charge electric current I z and Iavg, if extreme difference is comparatively large, euqalizing current can be improved according to setting ratio, because balanced each cell SOC or SOB moves closer to, reduced the mode of euqalizing current by adjustment duty ratio gradually, reach efficient and control the conforming effect of monomer accurately.
As improvement, balanced startup strategy, when the highest during charging (minimum during electric discharge) monomer floating voltage Vdkx reaches setting voltage, unlatching equilibrium when failure state that floating voltage Vdkx extreme difference is greater than 20mV and system does not break down, charging, electric discharge, inactive state all can be opened, and the m of minimum SOC or SOB saves cell and can open simultaneously.
The beneficial effect that the present invention is compared with prior art brought is:
The characteristic of each monomer is analyzed on dynamic ground, during battery power discharge, precisely efficiently the energy supplement of the monomer battery core of high power capacity is given the monomer battery core of low appearance; During batteries charging, the energy of the battery core precisely low appearance be first full of efficiently moves the battery core be full of to Gao Ronghou, make the battery pack core that respectively economizes on electricity accomplish to exhaust simultaneously and be full of simultaneously, thus realize the effect of learning from other's strong points to offset one's weaknesses that high efficiency is moved and loss is minimum, promote battery pack whole volume.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is flow chart of the present invention.
Fig. 3 is the unloaded character voltage model schematic of charge and discharge percentage.
Embodiment
Below in conjunction with Figure of description, the invention will be further described.
As shown in Figure 1, a kind of dynamic conditioning type battery pack active equalization method, it comprises transformer based on the circuit realized, and described transformer comprises a main coil and n secondary coil, n >=3; Each secondary coil correspondence is connected with a cell, and described cell is composed in series battery pack, and as shown in Figure 2, utilize the electric energy of battery pack to carry out supplementary electric method to wherein m cell and comprise the following steps, m≤n/3, wherein m is integer;
(1) battery pack starts initial alignment:
(2) cell is full of and the floating voltage of detection record cell;
(3) battery pack constant-current discharge, detects electric current and calculates discharge capacity;
(4) record monomer battery discharge and be with live pressure instantaneously;
(5) calculate and record internal resistance of single cell DCR;
(6) monomer battery voltage and capacity is recorded at set intervals until discharge off;
(7) cell electric discharge d%-Vdkx curve is built;
(8) battery pack starts charging;
(9) voltage of cell and capacity is recorded at set intervals until charge complete;
(10) cell charging c%-Vckx curve is built;
(11) battery pack primary data is demarcated complete;
(12) normally use and record cell floating voltage;
(13) battery power discharge, survey calculation internal resistance of single cell DCR and discharge capacity;
(14) measure monomer battery voltage, and remove internal resistance dividing potential drop to calculate floating voltage;
(15) when battery power discharge is greater than 20mV opens during failure state to setting capacity, floating voltage Vdkx extreme difference and system does not break down balanced;
(16) m the cell that floating voltage is minimum is charged, until floating voltage reaches mean value;
(17) judging whether cell floating voltage extreme difference is less than set point, otherwise continue balanced, is stop equilibrium, until discharge off;
(18) battery pack starts charging and survey calculation charged electrical capacity;
(19) measure monomer battery voltage, and remove internal resistance dividing potential drop to calculate floating voltage;
(20) when batteries charging is greater than 20mV opens during failure state to setting capacity, floating voltage Vdkx extreme difference and system does not break down balanced;
(21) m the cell that floating voltage is minimum is charged, until floating voltage reaches mean value;
(22) judging whether cell floating voltage extreme difference is less than set point, otherwise continue balanced, is stop equilibrium, until it is complete to charge;
When each electric discharge moment and electric current are more than or equal to 0.1C, according to the difference Δ V/ electric current I=internal resistance of single cell DCR of transient voltage after voltage before cell electric discharge and electric discharge.
According to constant-current discharge mode detection initial discharge character voltage Vdx (detected every 15 seconds and store once) and " real-time current I-time Δ t " data, integration ∫ Idt calculates and puts capacity C d again, until electric discharge terminates, record first minimum cell discharge capacity Cd0min, percent of discharge d%=Cd/Cd0min, after the voltage Vdx compensation internal resistance dividing potential drop I*DCR of the detection in corresponding stored moment, obtain cell electric discharge floating voltage Vdkx, and " the unloaded character voltage Vdkx of percent of discharge d%-" diagram database is built in memory with percent of discharge d%, now discharge data library initialization is complete.
When electric discharge uses, discharge capacity Cd and inquiry discharge data storehouse floating voltage Vdkx correspondence put volume percent d% to calculate reality according to detection data integrate, calculate each cell real surplus capacity SOCx=Cd/d%-Cd, thus learn that a few joint cell SOC is minimum, when reaching balanced unlocking condition, supplementary electrical equalization is carried out to it.
Primary charging character voltage Vcx (detected every 15 seconds and store once) and " real-time current I-time Δ t " data are detected according to constant current charging mode, integration ∫ Idt calculates and fills capacity C c again, until charging terminates, record first minimum monomer charging capacity Cc0min, charge percentage c%=Cc/Cc0min, after the voltage Vcx compensation internal resistance dividing potential drop I*DCR of the detection in corresponding stored moment, obtain monomer charging floating voltage Vckx, and " the unloaded character voltage Vckx of charge percentage c%-" diagram database is built in memory with charge percentage c%, now charge data library initialization is complete.
As shown in Figure 3, when charging uses, charging capacity Cc and inquiry charge data storehouse floating voltage Vckx correspondence fill volume percent c% to calculate reality according to detection data integrate, calculate each joint cell capacity SOBx=Cc/c%-Cc actual to be filled, thus learn that a few joint cell SOB is minimum, when reaching balanced unlocking condition, supplementary electrical equalization is carried out to it.Because battery material itself determines battery charging and discharging curve model, even if battery actual capacity can reduce gradually along with use, but curve model change is very small, can ignore, so the present invention utilizes lithium battery to discharge or this characteristic of charge percentage curve model has reasonably extrapolated battery actual capacity Cr=AVG (Cc/c%, Cd/d%), the i.e. mean value of charge/discharge capacity, when the ratio of this Cr and initial nominal capacity C occurs being less than 70% 3 time continuously, prompting user need be changed battery pack by system.
Lz serves as theme the circle number of turns, and secondary coil number of turns Lx=1.3Lz/n, monomer charge coil floating voltage Vxmax=1.3VDD/n, make often to save cell and can reach enough charging voltages and charging current, guarantee equalization efficiency and voltage controlled.
Main coil current Iz is recorded jointly by the RC filter circuit of inspection leakage resistance R2, scaling circuit and resistance R1, electric capacity C1 composition, and secondary current is Ix, and voltage is Vx, simultaneously balanced monomer number is m, according to conservation of energy principle, ignore the dissipation loss in loop, balanced energy
during equalizing charge, Vx equals monomer battery core both end voltage Vcell, thus can obtain each monomer average voltage Vavg and average electric current I avg.
According to the PWM duty ratio of each cell SOC and SOB and extreme difference size dynamic conditioning CtrZ thereof, thus have adjusted monomer equalizing charge electric current I z and Iavg, if extreme difference is comparatively large, euqalizing current can be improved according to setting ratio, because balanced each cell SOC or SOB moves closer to, reduced the mode of euqalizing current by adjustment duty ratio gradually, reach efficient and control the conforming effect of monomer accurately.
Balanced startup strategy, when the highest during charging (minimum during electric discharge) monomer floating voltage Vdkx reaches setting voltage, unlatching equilibrium when failure state that floating voltage Vdkx extreme difference is greater than 20mV and system does not break down, charging, electric discharge, inactive state all can be opened, and the m of minimum SOC or SOB saves cell and can open simultaneously.
Balanced stop strategy, when every batteries all do not reach balanced cut-in voltage, temperature protection, battery failures lost efficacy, floating voltage Vdkx reaches mean value and extreme difference is less than 10mV, shutdown, dormancy time close balanced.
Above-mentioned SOC represents the residual capacity of battery; SOB represents the capacity to be filled of battery, also has how many spaces to fill.
In above-mentioned steps (14) and (19), the voltage of cell utilizes high precision measuring device to measure, it comprises the first voltage measurement module and the second voltage measurement module, and described first voltage measurement module and the second voltage measurement module are equipped with some voltage acquisition lines.Described battery pack is in series by some cells, supposes that battery pack is in series by eight joint cell B1 ~ B8.First voltage acquisition line of described first voltage measurement module is connected to the positive pole of battery pack; Second voltage acquisition line is connected to the positive pole of second section cell B2, and the 3rd voltage acquisition line is connected to the negative pole of second section cell B2; 4th voltage acquisition line is connected to the positive pole of Section of four cell B4, and the 5th voltage acquisition line is connected to the negative pole of Section of four cell B4; Six roots of sensation voltage acquisition line is connected to the positive pole of Section of six cell B6, and the 7th voltage acquisition line is connected to the negative pole of Section of six cell B6; 8th voltage acquisition line is connected to the positive pole of Section of eight cell B8, and the 9th voltage acquisition line is connected to the negative pole of Section of eight cell B8.First voltage acquisition line of the first voltage acquisition module is connected in the positive pole of first segment cell B1, and second voltage acquisition line is connected to the negative pole of first segment cell B1; 3rd voltage acquisition line is connected in the positive pole of Section of three cell B3, and the 4th voltage acquisition line is connected to the negative pole of Section of three cell B3; 5th voltage acquisition line is connected in the positive pole of Section of five cell B5, and six roots of sensation voltage acquisition line is connected to the negative pole of Section of five cell B5; 7th voltage acquisition line is connected in the positive pole of Section of seven cell B7, and the 8th voltage acquisition line is connected to the negative pole of Section of seven cell B7; Last root voltage acquisition line is connected to the negative pole of battery pack.The voltage come measured by first, second root voltage acquisition line of first voltage measurement module is that first segment cell B1 voltage VB1 adds the line resistance of serial connection and the dividing potential drop VR1 of contact resistance; The voltage come measured by first, second root voltage acquisition line of second voltage measurement module is exactly first segment cell B1 voltage VB1; The voltage come measured by second, third root voltage acquisition line of first voltage measurement module is exactly second section cell B2 voltage VB2; The voltage come measured by second, third root voltage acquisition line of second voltage measurement module is that second section cell B2 voltage VB2 adds the line resistance of serial connection and the dividing potential drop VR2 of contact resistance; The monomer battery voltage of even-numbered can be obtained by the first voltage measurement module, and the monomer battery voltage of odd-numbered can be obtained by the second voltage measurement module; The rest may be inferred, can draw voltage and all ohmically dividing potential drops of R1 ~ R7 of all cells of B1 ~ B8.
Claims (10)
1. a dynamic conditioning type battery pack active equalization method, is characterized in that: it comprises transformer based on the circuit realized, and described transformer comprises a main coil and n secondary coil, n >=3; Each secondary coil correspondence is connected with a cell, and described cell is composed in series battery pack, and utilize the electric energy of battery pack to carry out supplementary electric method to wherein m cell and comprise the following steps, m≤n/3, wherein m is integer;
(1) battery pack starts initial alignment:
(2) cell is full of and the floating voltage of detection record cell;
(3) battery pack constant-current discharge, detects electric current and calculates discharge capacity;
(4) record monomer battery discharge and be with live pressure instantaneously;
(5) calculate and record internal resistance of single cell DCR;
(6) monomer battery voltage and capacity is recorded at set intervals until discharge off;
(7) cell electric discharge d%-Vdkx curve is built;
(8) battery pack starts charging;
(9) voltage of cell and capacity is recorded at set intervals until charge complete;
(10) cell charging c%-Vckx curve is built;
(11) battery pack primary data is demarcated complete;
(12) normally use and record cell floating voltage;
(13) battery power discharge, survey calculation internal resistance of single cell DCR and discharge capacity;
(14) measure monomer battery voltage, and remove internal resistance dividing potential drop to calculate floating voltage;
(15) when battery power discharge is greater than 20mV opens during failure state to setting capacity, floating voltage Vdkx extreme difference and system does not break down balanced;
(16) m the cell that floating voltage is minimum is charged, until floating voltage reaches mean value;
(17) judging whether cell floating voltage extreme difference is less than set point, otherwise continue balanced, is stop equilibrium, until discharge off;
(18) battery pack starts charging and survey calculation charged electrical capacity;
(19) measure monomer battery voltage, and remove internal resistance dividing potential drop to calculate floating voltage;
(20) when batteries charging is greater than 20mV opens during failure state to setting capacity, floating voltage Vdkx extreme difference and system does not break down balanced;
(21) m the cell that floating voltage is minimum is charged, until floating voltage reaches mean value;
(22) judging whether cell floating voltage extreme difference is less than set point, otherwise continue balanced, is stop equilibrium, until it is complete to charge.
2. a kind of dynamic conditioning type battery pack active equalization method according to claim 1, it is characterized in that: when each electric discharge moment and electric current are more than or equal to 0.1C, according to the difference Δ V/ electric current I=internal resistance of single cell DCR of transient voltage after voltage before cell electric discharge and electric discharge.
3. a kind of dynamic conditioning type battery pack active equalization method according to claim 2, it is characterized in that: according to constant-current discharge mode detection initial discharge character voltage Vdx and " real-time current I-time Δ t " data, integration ∫ Idt calculates and puts capacity C d again, until electric discharge terminates, record first minimum cell discharge capacity Cd0min, percent of discharge d%=Cd/Cd0min, after the voltage Vdx compensation internal resistance dividing potential drop I*DCR of the detection in corresponding stored moment, obtain cell electric discharge floating voltage Vdkx, and " the unloaded character voltage Vdkx of percent of discharge d%-" diagram database is built in memory with percent of discharge d%, now discharge data library initialization is complete.
4. a kind of dynamic conditioning type battery pack active equalization method according to claim 3, it is characterized in that: when electric discharge uses, discharge capacity Cd and inquiry discharge data storehouse floating voltage Vdkx correspondence put volume percent d% to calculate reality according to detection data integrate, calculate each cell real surplus capacity SOC=Cd/d%-Cd, thus learn that a few joint cell SOC is minimum, when reaching balanced unlocking condition, supplementary electrical equalization is carried out to it.
5. a kind of dynamic conditioning type battery pack active equalization method according to claim 4, it is characterized in that: detect primary charging character voltage Vcx and " real-time current I-time Δ t " data according to constant current charging mode, integration ∫ Idt calculates and fills capacity C c again, until charging terminates, record first minimum monomer charging capacity Cc0min, charge percentage c%=Cc/Cc0min, after the voltage Vcx compensation internal resistance dividing potential drop I*DCR of the detection in corresponding stored moment, obtain monomer charging floating voltage Vckx, and " the unloaded character voltage Vckx of charge percentage c%-" diagram database is built in memory with charge percentage c%, now charge data library initialization is complete.
6. a kind of dynamic conditioning type battery pack active equalization method according to claim 5, it is characterized in that: when charging uses, charging capacity Cc and inquiry charge data storehouse floating voltage Vckx correspondence fill volume percent c% to calculate reality according to detection data integrate, calculate each joint cell capacity SOB=Cc/c%-Cc actual to be filled, thus learn that a few joint cell SOB is minimum, when reaching balanced unlocking condition, supplementary electrical equalization is carried out to it.
7. a kind of dynamic conditioning type battery pack active equalization method according to claim 6, it is characterized in that: Lz serves as theme the circle number of turns, secondary coil number of turns Lx=1.3Lz/n, monomer charge coil floating voltage Vxmax=1.3VDD/n, make often to save cell and can reach enough charging voltages and charging current, guarantee equalization efficiency and voltage controlled.
8. a kind of dynamic conditioning type battery pack active equalization method according to claim 7, it is characterized in that: main coil current Iz is recorded jointly by the RC filter circuit of inspection leakage resistance R2, scaling circuit and resistance R1, electric capacity C1 composition, secondary current is Ix, voltage is Vx, simultaneously balanced monomer number is m, according to conservation of energy principle, ignore the dissipation loss in loop, balanced energy
during equalizing charge, Vx equals monomer battery core both end voltage Vcell, thus can obtain each monomer average voltage Vavg and average electric current I avg.
9. a kind of dynamic conditioning type battery pack active equalization method according to claim 8, it is characterized in that: according to the PWM duty ratio of each cell SOC and SOB and extreme difference size dynamic conditioning CtrZ thereof, thus have adjusted monomer equalizing charge electric current I z and Iavg, if extreme difference is comparatively large, euqalizing current can be improved according to setting ratio, because balanced each cell SOC or SOB moves closer to, reduced the mode of euqalizing current by adjustment duty ratio gradually, reach efficient and control the conforming effect of monomer accurately.
10. a kind of dynamic conditioning type battery pack active equalization method according to claim 9, it is characterized in that: balanced startup strategy, when during charging, most high monomer floating voltage Vdkx reaches setting voltage, unlatching equilibrium when failure state that floating voltage Vdkx extreme difference is greater than 20mV and system does not break down, charging, electric discharge, inactive state all can be opened, and the m of minimum SOC or SOB saves cell and can open simultaneously.
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| CN106671784B (en) * | 2016-10-09 | 2019-02-22 | 绵阳力神动力电池系统有限公司 | A kind of electric car power supply equilibrium fault recovery method with constant volume charge and discharge |
| KR102123048B1 (en) * | 2017-01-10 | 2020-06-15 | 주식회사 엘지화학 | Charge Control Apparatus capable of high speed cell balancing and energy saving and Method thereof |
| CN106848451B (en) * | 2017-02-20 | 2019-03-19 | 成都雅骏新能源汽车科技股份有限公司 | A kind of battery pressure difference adaptive regulation method |
| CN107785967A (en) * | 2017-11-21 | 2018-03-09 | 中航锂电（洛阳）有限公司 | Accumulation power supply system capacity balance control method, control device and equalizing system |
| CN109687548B (en) * | 2018-12-28 | 2022-11-04 | 中国船舶重工集团公司第七一九研究所 | Supplementary electric formula of storage battery initiative balancing unit |
| CN109649217B (en) * | 2019-01-16 | 2021-01-26 | 中国船舶重工集团公司第七一九研究所 | Control method of electric vehicle supplementary power type lithium battery pack balancing device |
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