CN103700901A - Multistage intelligent charging method - Google Patents
Multistage intelligent charging method Download PDFInfo
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- CN103700901A CN103700901A CN201410009105.3A CN201410009105A CN103700901A CN 103700901 A CN103700901 A CN 103700901A CN 201410009105 A CN201410009105 A CN 201410009105A CN 103700901 A CN103700901 A CN 103700901A
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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
- H01M10/446—Initial charging measures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a multistage intelligent charging method which is suitable for rechargeable batteries. The multistage intelligent charging method comprises a diagnosis step of detecting the voltage of a battery, a soft starting step of enabling charging current to slowly rise from low to high, steps of performing charging under constant current I, charging under constant current II, charging under constant current III, charging under constant voltage, full charging and recharging, and steps of performing pulse devulcanization, precharging and high-voltage restoration. The multistage intelligent charging method has the precharging function and the soft starting function, so that damage, caused by high current, to the normal battery can be alleviated, and the service life of the battery can be prolonged; due to the devulcanization function, the capacity of a battery which is severely vulcanized can be improved; by virtue of the restoration function, the capacity of an aged battery can be recovered.
Description
Technical field
The present invention relates to the charging method of rechargeable battery, specifically, is a kind of multisection type intelligent charging method.
Background technology
Rechargeable battery particularly lead acid accumulator (6V, 12V, 24V) apply in daily life very extensive, the life-span that correct good charging method can be guaranteed battery.How can better charge the battery, how to charge and can reduce the infringement to battery, how repair battery, the problem of extending battery life with regard to having become people to consider and to solve.Application number is that the patent documentation of 201210275223.X discloses a kind of multisection type charging battery module method and device thereof, the method is that constant-current charge is divided into several stages, there are different current values and charging interval in per stage, when charging reaches after predetermined voltage, then carries out constant-voltage charge.This charging method energy burning voltage, lifting battery charge efficiency, but this charging method is the battery module that is applicable to comprise a plurality of battery cores joint group.About the present invention is directed to the charging method of rechargeable battery, yet there are no report.
Summary of the invention
The object of the invention is for deficiency of the prior art, a kind of multisection type intelligent charging method is provided.
For achieving the above object, the technical scheme that the present invention takes is:
A multisection type intelligent charging method, is applicable to rechargeable battery, comprises the following steps:
(1) diagnosis, detects cell voltage, and next step action of judgement charger is preliminary filling, soft start, reporting an error connects, reports bad battery or report is full of;
(2) soft start, charging current slowly rises from small to large, prevents from that charging current from suddenling change to battery, to bring impact, protection battery;
(3) constant current one, with electric current I 1, charges the battery until cell voltage arrives V4;
(4) constant current two, with electric current I 2, charge the battery until cell voltage arrives V3;
(5) constant current three, with electric current I 3, charge the battery and are full of voltage V2 until cell voltage arrives;
(6) constant voltage, cell voltage remains unchanged, and slowly reduces charging current until charging current arrives I4;
(7) be full of, when cell voltage arrives when being full of voltage V2 and charging current and being less than I4, battery is full of, turn-offs charge switch, stops charging;
(8) charging again, after being full of a period of time, when cell voltage falls to V5, charger charges again to battery;
Wherein, V2 > V3 > V4 > V5, I1 > I2 > I3 > I4.
As one embodiment of the present invention, between described diagnosis algorithm and soft start step, also have priming procedure, be when cell voltage is very low, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value.
As one embodiment of the present invention, between described diagnosis algorithm and soft start step, also have pulse devulcanization step and priming procedure, pulse devulcanization step is to find out the battery of sulfuration, with pulse current and voltage, removes the sulfide on battery pole plates, recovers battery capacity; Priming procedure is when cell voltage is very low, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value.
As one embodiment of the present invention, in described being full of step and again also having Pressure method step between charge step, to be full of rear voltage drop when too fast when battery, illustrate that battery capacity diminishes, at this moment to continue high pressure, charge the battery, make inside battery produce some controllable gas and mix with the acidic materials of inside battery, recover battery capacity.Further, also having priming procedure between described diagnosis algorithm and soft start step, is when cell voltage is very low, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value; Or, between described diagnosis algorithm and soft start step, also having pulse devulcanization step and priming procedure, pulse devulcanization step is to find out the battery of sulfuration, with pulse current and voltage, removes the sulfide on battery pole plates, recovers battery capacity; Priming procedure is when cell voltage is very low, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value.
In sum, charging method of the present invention has following several mode, but is not limited to listed mode:
(I) diagnosis, soft start, constant current one, constant current two, constant current three, constant voltage, be full of, again charging;
(II) diagnosis, preliminary filling, soft start, constant current one, constant current two, constant current three, constant voltage, be full of, again charging;
(III) diagnosis, pulse devulcanization, preliminary filling, soft start, constant current one, constant current two, constant current three, constant voltage, be full of, again charging;
(IV) diagnosis, soft start, constant current one, constant current two, constant current three, constant voltage, be full of, Pressure method, again charging;
(V) diagnosis, preliminary filling, soft start, constant current one, constant current two, constant current three, constant voltage, be full of, Pressure method, again charging;
(VI) diagnosis, pulse devulcanization, preliminary filling, soft start, constant current one, constant current two, constant current three, constant voltage, be full of, Pressure method, again charging.
The charger of realizing charging method of the present invention comprises single-chip microcomputer, control circuit, Switching Power Supply, relay K 1, two diodes, triode Q1, two electric capacity and a plurality of resistance, wherein control circuit one end is connected with single-chip microcomputer, the other end is connected with Switching Power Supply, and the other end of Switching Power Supply is succeeded respectively electrical equipment K1 and welding system ground;
Described single-chip microcomputer 1 pin is connected with R9, and output PWM, by controlling charging voltage after capacitance-resistance filter, single-chip microcomputer 2 pin are connected with R11, and output PWM, by controlling charging current after capacitance-resistance filter, single-chip microcomputer 3 pin are connected with R3, the break-make of control relay K1, single-chip microcomputer 4 pin are connected with R1, R2, gather cell voltage, single-chip microcomputer 5 pin are connected with R7, gather charging current, single-chip microcomputer 6 pin connection+5V power supplys, single-chip microcomputer 7 pin welding system ground;
Resistance R 1 one pin connect anode, and another pin is connected with R2; R2 mono-pin is connected with R1, another pin welding system ground; R3 mono-pin connects single-chip microcomputer 3 pin, and another pin connects triode Q1 base stage; Connect+12V of R5 mono-pin power supply, it is anodal that another pin meets diode D1; R6 mono-pin is connected with battery cathode, another pin welding system ground; R7 mono-pin is connected with single-chip microcomputer 5 pin, and another pin connects battery cathode; R8 mono-pin is connected with R9, another pin connection control circuit; R9 mono-pin is connected with single-chip microcomputer 1 pin, and another pin is connected with R8; R10 mono-pin connection control circuit, another pin is connected with R11; R11 mono-pin is connected with single-chip microcomputer 2 pin, and another pin is connected with R10;
Capacitor C 4 one pin are connected with R8, R9, another pin welding system ground; C5 mono-pin is connected with R10, R11, another pin welding system ground;
Diode D1 positive pole is connected with R5, and negative pole is succeeded 2 pin of electrical equipment K1; Diode D2 positive pole connects triode Q1 collector electrode, and negative pole is succeeded 2 pin of electrical equipment K1;
Triode Q1 base stage is connected with R3, and collector electrode is connected with diode D2 is anodal, emitter welding system ground;
1 pin of relay K 1 is connected with triode Q1 collector electrode, and 2 pin are connected with diode D1 negative pole, and 3 pin are connected with Switching Power Supply output cathode with after 4 pin short circuits, and 5 pin are connected with anode.
Different batteries has the different voltage that is full of, and the voltage that is full of of 6V battery is 7.2V; The voltage that is full of of 12V battery is 14.6V; The voltage that is full of of 24V battery is 28.8V.Aging battery can adopt above-mentioned (VI) to plant charging method, and normal battery can adopt (I) to plant charging method, and normal A-battery can adopt (II) to plant charging method.
The invention has the advantages that:
1, multisection type intelligent charging method of the present invention has devulcanization function, while vulcanizing serious battery with common charging method charging, can be full of very soon, but inside battery reality is not charged into how many electric weight, with high-voltage pulse, can remove the sulfide on battery pole plates, increase battery capacity;
2, have precharge function, when cell voltage is very low, with large current charge, can cause very major injury to battery, infringement battery life, is first charged to a safety value with little electric current cell voltage, can effectively protect battery, extending battery life;
3, have soft start function, charging current slowly rises from small to large, prevents from that charging current from suddenling change to battery, to bring impact, protection battery;
Current segmenting while 4, charging normal, with large electric current, charging the battery for a long time can infringement battery, along with the rising of cell voltage progressively reduces electric current, can reduce the infringement to battery, extending battery life;
5, have repair function, aging battery is after being full of, and it is very fast that cell voltage can fall, and at this moment to continue high pressure, it repaired, and can recover battery capacity.
Accompanying drawing explanation
Accompanying drawing 1 is the charge graph of aging battery.
Accompanying drawing 2 is charging circuit figure.
Accompanying drawing 3 is charge graph of normal battery.
Accompanying drawing 4 is charge graph of normal A-battery.
Embodiment
Below in conjunction with accompanying drawing, embodiment provided by the invention is elaborated.
embodiment 1
Take 12V battery, 10A charger is example, and the voltage that is full of of 12V battery is 14.6V.For the multisection type intelligent charging method of aging battery, please refer to the charge graph of Fig. 1, comprise the following steps:
(1) diagnosis, detects cell voltage, next step action of judgement charger;
(2) pulse devulcanization, removes the sulfide on battery pole plates with pulse current and voltage, recovers battery capacity;
(3) preliminary filling, when cell voltage is during lower than 12V, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value;
(4) soft start, charging current slowly rises from small to large, prevents from that charging current from suddenling change to battery, to bring impact, protection battery;
(5) constant current one, with electric current I 1, charges the battery until cell voltage arrives 13.6V;
(6) constant current two, with electric current I 2, charge the battery until cell voltage arrives 14V;
(7) constant current three, with electric current I 3, charge the battery and are full of voltage 14.6V until cell voltage arrives;
(8) constant voltage, cell voltage remains unchanged, and slowly reduces charging current until charging current arrives I4;
(9) be full of, when cell voltage arrives when being full of voltage 14.6V and charging current and being less than I4, battery is full of, turn-offs charge switch, stops charging;
(10) Pressure method, when battery is full of rear voltage drop when too fast, illustrate that battery capacity diminishes, at this moment to continue high pressure, charges the battery, and makes inside battery produce some controllable gas and mixes with the acidic materials of inside battery, recovery battery capacity;
(11) charging again, after being full of a period of time, when cell voltage falls to 12.8V, charger charges again to battery.
Wherein, I1 is 10A, and I2 is 7.55A, and I3 is 5A, and I4 is 0.8A.
The charger of realizing this multisection type intelligent charging method comprises single-chip microcomputer IC1, control circuit, Switching Power Supply, relay K 1, two diodes, triode Q1, two electric capacity and a plurality of resistance, please refer to the circuit diagram shown in Fig. 2, wherein control circuit one end is connected with single-chip microcomputer, the other end is connected with Switching Power Supply, and the other end of Switching Power Supply is succeeded respectively electrical equipment K1 and welding system ground.
1 pin of described single-chip microcomputer IC1 is connected with resistance R 9, and output PWM, by controlling charging voltage after capacitance-resistance filter; 2 pin of single-chip microcomputer IC1 are connected with resistance R 11, and output PWM, by controlling charging current after capacitance-resistance filter; 3 pin of single-chip microcomputer IC1 are connected with resistance R 3, the break-make of control relay K1; 4 pin of single-chip microcomputer IC1 are connected with resistance R 1, resistance R 2, gather cell voltage; 5 pin of single-chip microcomputer IC1 are connected with resistance R 7, gather charging current; The 6 pin connection+5V power supplys of single-chip microcomputer IC1, the 7 pin welding system ground of single-chip microcomputer IC1.
Resistance R 1 one pin connect anode, and another pin is connected with resistance R 2; Resistance R 2 one pin are connected with resistance R 1, another pin welding system ground; Resistance R 3 one pin connect 3 pin of single-chip microcomputer IC1, and another pin connects triode Q1 base stage; Connect+12V of resistance R 5 one pin power supply, it is anodal that another pin meets diode D1; Resistance R 6 one pin are connected with battery cathode, another pin welding system ground; Resistance R 7 one pin are connected with 5 pin of single-chip microcomputer IC1, and another pin connects battery cathode; Resistance R 8 one pin are connected with resistance R 9, another pin connection control circuit; Resistance R 9 one pin are connected with 1 pin of single-chip microcomputer IC1, and another pin is connected with resistance R 8; Resistance R 10 1 pin connection control circuits, another pin is connected with resistance R 11; Resistance R 11 1 pin are connected with 2 pin of single-chip microcomputer IC1, and another pin is connected with resistance R 10.
Capacitor C 4 one pin are connected with resistance R 8, resistance R 9, another pin welding system ground; Capacitor C 5 one pin are connected with resistance R 10, resistance R 11, another pin welding system ground.
Diode D1 positive pole is connected with resistance R 5, and negative pole is succeeded 2 pin of electrical equipment K1; Diode D2 positive pole connects triode Q1 collector electrode, and negative pole is succeeded 2 pin of electrical equipment K1; Triode Q1 base stage is connected with resistance R 3, and collector electrode is connected with diode D2 is anodal, emitter welding system ground.
1 pin of relay K 1 is connected with triode Q1 collector electrode, and 2 pin are connected with diode D1 negative pole, and 3 pin are connected with Switching Power Supply output cathode with after 4 pin short circuits, and 5 pin are connected with anode.
Operation principle is: single-chip microcomputer IC1 detects battery to be charged by 4 pin and is connected with charger, after judging that by diagnosis this battery is rechargeable battery, the 3 pin output high level of single-chip microcomputer IC1 are opened triode Q1, and then relay K 1 is opened, single-chip microcomputer IC1 charges the battery by 1 foot control charging voltage processed, 2 foot control charging current processed.The size of charging current and voltage is controlled according to the charge graph shown in Fig. 1.
Take 12V battery, 10A charger is example, and the voltage that is full of of 12V battery is 14.6V.For the multisection type intelligent charging method of normal battery, please refer to the charge graph of Fig. 3, comprise the following steps:
(1) diagnosis, detects cell voltage, next step action of judgement charger;
(2) soft start, charging current slowly rises from small to large, prevents from that charging current from suddenling change to battery, to bring impact, protection battery;
(3) constant current one, with electric current I 1, charges the battery until cell voltage arrives 13.6V;
(4) constant current two, with electric current I 2, charge the battery until cell voltage arrives 14V;
(5) constant current three, with electric current I 3, charge the battery and are full of voltage 14.6V until cell voltage arrives;
(6) constant voltage, cell voltage remains unchanged, and slowly reduces charging current until charging current arrives I4;
(7) be full of, when cell voltage arrives when being full of voltage 14.6V and charging current and being less than I4, battery is full of, turn-offs charge switch, stops charging;
(8) charging again, after being full of a period of time, when cell voltage falls to 12.8V, charger charges again to battery.
Wherein, I1 is 10A, and I2 is 7.55A, and I3 is 5A, and I4 is 0.8A.
Realize the charger of this multisection type intelligent charging method with described in embodiment 1.
embodiment 3
Take 12V battery, 10A charger is example, and the voltage that is full of of 12V battery is 14.6V.For the multisection type intelligent charging method of normal A-battery, please refer to the charge graph of Fig. 4, comprise the following steps:
(1) diagnosis, detects cell voltage, next step action of judgement charger;
(2) preliminary filling, when cell voltage is during lower than 12V, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value;
(3) soft start, charging current slowly rises from small to large, prevents from that charging current from suddenling change to battery, to bring impact, protection battery;
(4) constant current one, with electric current I 1, charges the battery until cell voltage arrives 13.6V;
(5) constant current two, with electric current I 2, charge the battery until cell voltage arrives 14V;
(6) constant current three, with electric current I 3, charge the battery and are full of voltage 14.6V until cell voltage arrives;
(7) constant voltage, cell voltage remains unchanged, and slowly reduces charging current until charging current arrives I4;
(8) be full of, when cell voltage arrives when being full of voltage 14.6V and charging current and being less than I4, battery is full of, turn-offs charge switch, stops charging;
(9) charging again, after being full of a period of time, when cell voltage falls to 12.8V, charger charges again to battery.
Wherein, I1 is 10A, and I2 is 7.55A, and I3 is 5A, and I4 is 0.8A.
Realize the charger of this multisection type intelligent charging method with described in embodiment 1.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the inventive method; can also make some improvement and supplement, these improvement and supplement and also should be considered as protection scope of the present invention.
Claims (7)
1. a multisection type intelligent charging method, is applicable to rechargeable battery, it is characterized in that, comprises the following steps:
(1) diagnosis, detects cell voltage, next step action of judgement charger;
(2) soft start, charging current slowly rises from small to large, prevents from that charging current from suddenling change to battery, to bring impact, protection battery;
(3) constant current one, with electric current I 1, charges the battery until cell voltage arrives V4;
(4) constant current two, with electric current I 2, charge the battery until cell voltage arrives V3;
(5) constant current three, with electric current I 3, charge the battery and are full of voltage V2 until cell voltage arrives;
(6) constant voltage, cell voltage remains unchanged, and slowly reduces charging current until charging current arrives I4;
(7) be full of, when cell voltage arrives when being full of voltage V2 and charging current and being less than I4, battery is full of, turn-offs charge switch, stops charging;
(8) charging again, after being full of a period of time, when cell voltage falls to V5, charger charges again to battery;
Wherein, V2 > V3 > V4 > V5, I1 > I2 > I3 > I4.
2. multisection type intelligent charging method according to claim 1; it is characterized in that between described diagnosis algorithm and soft start step, also having priming procedure, is when cell voltage is very low; in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value.
3. multisection type intelligent charging method according to claim 1, it is characterized in that, between described diagnosis algorithm and soft start step, also have pulse devulcanization step and priming procedure, pulse devulcanization step is to find out the battery of sulfuration, with pulse current and voltage, remove the sulfide on battery pole plates, recover battery capacity; Priming procedure is when cell voltage is very low, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value.
4. multisection type intelligent charging method according to claim 1, it is characterized in that, in described being full of step and again also having Pressure method step between charge step, to be full of rear voltage drop when too fast when battery, illustrate that battery capacity diminishes, at this moment to continue high pressure, charge the battery, make inside battery produce some controllable gas and mix with the acidic materials of inside battery, recover battery capacity.
5. multisection type intelligent charging method according to claim 4; it is characterized in that between described diagnosis algorithm and soft start step, also having priming procedure, is when cell voltage is very low; in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value.
6. multisection type intelligent charging method according to claim 4, it is characterized in that, between described diagnosis algorithm and soft start step, also have pulse devulcanization step and priming procedure, pulse devulcanization step is to find out the battery of sulfuration, with pulse current and voltage, remove the sulfide on battery pole plates, recover battery capacity; Priming procedure is when cell voltage is very low, in order to protect battery to charge the battery with little electric current, until cell voltage arrives a safety value.
7. according to the multisection type intelligent charging method described in the arbitrary claim of claim 1-6, it is characterized in that, the charger of realizing described charging method comprises single-chip microcomputer, control circuit, Switching Power Supply, relay K 1, two diodes, triode Q1, two electric capacity and a plurality of resistance, wherein control circuit one end is connected with single-chip microcomputer, the other end is connected with Switching Power Supply, and the other end of Switching Power Supply is succeeded respectively electrical equipment K1 and welding system ground;
Described single-chip microcomputer 1 pin is connected with R9, and output PWM, by controlling charging voltage after capacitance-resistance filter, single-chip microcomputer 2 pin are connected with R11, and output PWM, by controlling charging current after capacitance-resistance filter, single-chip microcomputer 3 pin are connected with R3, the break-make of control relay K1, single-chip microcomputer 4 pin are connected with R1, R2, gather cell voltage, single-chip microcomputer 5 pin are connected with R7, gather charging current, single-chip microcomputer 6 pin connection+5V power supplys, single-chip microcomputer 7 pin welding system ground;
Resistance R 1 one pin connect anode, and another pin is connected with R2; R2 mono-pin is connected with R1, another pin welding system ground; R3 mono-pin connects single-chip microcomputer 3 pin, and another pin connects triode Q1 base stage; Connect+12V of R5 mono-pin power supply, it is anodal that another pin meets diode D1; R6 mono-pin is connected with battery cathode, another pin welding system ground; R7 mono-pin is connected with single-chip microcomputer 5 pin, and another pin connects battery cathode; R8 mono-pin is connected with R9, another pin connection control circuit; R9 mono-pin is connected with single-chip microcomputer 1 pin, and another pin is connected with R8; R10 mono-pin connection control circuit, another pin is connected with R11; R11 mono-pin is connected with single-chip microcomputer 2 pin, and another pin is connected with R10;
Capacitor C 4 one pin are connected with R8, R9, another pin welding system ground; C5 mono-pin is connected with R10, R11, another pin welding system ground;
Diode D1 positive pole is connected with R5, and negative pole is succeeded 2 pin of electrical equipment K1; Diode D2 positive pole connects triode Q1 collector electrode, and negative pole is succeeded 2 pin of electrical equipment K1;
Triode Q1 base stage is connected with R3, and collector electrode is connected with diode D2 is anodal, emitter welding system ground;
1 pin of relay K 1 is connected with triode Q1 collector electrode, and 2 pin are connected with diode D1 negative pole, and 3 pin are connected with Switching Power Supply output cathode with after 4 pin short circuits, and 5 pin are connected with anode.
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| WO2019227419A1 (en) * | 2018-05-31 | 2019-12-05 | Oppo广东移动通信有限公司 | Charging method, and charging device |
| CN112490525A (en) * | 2020-11-19 | 2021-03-12 | 浙江南都电源动力股份有限公司 | Charging method for prolonging service life of lead-acid storage battery |
| WO2022166257A1 (en) * | 2021-02-05 | 2022-08-11 | 浙江中剑科技股份有限公司 | Voltage-adaptive charging circuit for lead acid battery, charging method, and charger |
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| CN107689660A (en) * | 2017-10-25 | 2018-02-13 | 上海空间电源研究所 | The multistage constant-current pulse charging control circuit of space battery and its control method |
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