CN105098922A - 28V/35Ah zinc-silver battery charging system and charging method thereof - Google Patents
28V/35Ah zinc-silver battery charging system and charging method thereof Download PDFInfo
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- CN105098922A CN105098922A CN201510530363.0A CN201510530363A CN105098922A CN 105098922 A CN105098922 A CN 105098922A CN 201510530363 A CN201510530363 A CN 201510530363A CN 105098922 A CN105098922 A CN 105098922A
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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 provides a 28V/35Ah zinc-silver battery charging system and a charging method thereof. The charging system is provided with working voltage by a power conversion circuit, wherein a signal output end of a clock circuit is connected with a signal input end of a field programmable gate array (FPGA) signal processor; the signal output end of the FPGA signal processor is respectively connected with signal input ends of an inspection control circuit and a digital/analogue (D/A) conversion circuit through a bus driver; and the signal output end of an A/D signal collection circuit is connected with the signal input end of the bus driver. A 28V/35Ah zinc-silver battery is charged by a sine one-way full waveform with a conduction angle of 9ms; the 28V/35Ah zinc-silver battery is charged by an optimized charging strategy, so that the problem of 'two-flat section characteristic' of the zinc-silver battery in the charging process is effectively reduced; through inspecting the circuit, the charging strategy can be freely adjusted; the charging efficiency of the zinc-silver battery is improved; through a digitalized FPGA platform, the charging mode is dynamically adjusted; and the 28V/35Ah zinc-silver battery charging system has intelligent charging capability.
Description
Technical field
The present invention relates to zinc-silver oxide cell manufacturing technology field, be specifically related to a kind of 28V/35Ah zinc-silver oxide cell charging system and charging method thereof.
Background technology
Zinc-silver oxide cell is usually used in aerospace equipment owing to possessing the features such as higher specific energy, specific power, lower self-discharge rate, and during zinc-silver oxide cell charging, the positive pole of external power connects the positive pole of battery, and the negative pole of external power connects the negative pole of battery.The positive pole of external power seizes electronics from the positive pole of battery by force, and force the argent of positive pole to be oxidized to silver oxide, silver oxide is oxidized to silver peroxide further.Due to two kinds of valence state (silver oxide Ag of the oxide of silver
2o, silver peroxide AgO), make battery have two height electromotive force, make its charging process present two stages.17 monomer zinc-silver oxide cells are together in series use by certain product, and to zinc-silver oxide cell with 2A constant current charge, its cell voltage profiles can find out that charging curve has two level ground section characteristics, and as shown in Figure 1, this is also that the physical characteristic of zinc-silver oxide cell determines certainly.By analyzing zinc-silver oxide cell charging process, adopt special charging process can reach " the two level ground section characteristics " of validity minimizing charging process.
Because the physical characteristic of zinc-silver oxide cell determines, being together in series with 2A constant current charge to 17 monomer zinc-silver oxide cells, and is identical to 1 monomer zinc-silver oxide cell with the cell voltage profiles that 2A constant current charge shows.Learn thus, constant current charge fails minimizing 17 zinc-silver oxide cells " two level ground section characteristics ".
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of 28V/35Ah zinc-silver oxide cell charging system, this 28V/35Ah zinc-silver oxide cell charging system is by providing a kind of hardware and software based on high-speed d/a digital to analog converter in conjunction with platform, by exporting sinusoidal unidirectional full-wave electric current, and the logical process of systematic science and mathematical statistics strategy, and zinc-silver oxide cell real-time voltage is patrolled and examined, conservative control charging interval and charging current, the Annual distribution difference of effective minimizing silver battery " two level ground section characteristics ", can shorten the charging interval of 17 zinc-silver oxide cells preferably.
The present invention is achieved by the following technical programs.
A kind of 28V/35Ah zinc-silver oxide cell charging system provided by the invention, comprise power-switching circuit, FPGA signal processor, clock circuit, bus driver, inspection control circuit, D/A D/A converting circuit and A/D signal acquisition circuit, charging system provides operating voltage by power-switching circuit, the signal output part of described clock circuit is connected with the signal input part of FPGA signal processor, the signal output part of described FPGA signal processor by bus driver respectively with inspection control circuit, the signal input part of D/A D/A converting circuit connects, the described signal output part of A/D signal acquisition circuit is connected with the signal input part of bus driver.
The signal output part of described A/D signal acquisition circuit is connected with the signal input part of bus driver by optical coupling isolation circuit.
Described bus driver is connected with D/A D/A converting circuit by optical coupling isolation circuit.
Described FPGA signal processor is also connected with memory circuit communication.
The model of described bus driver is SN54LS245.
Described D/A D/A converting circuit adopts LTC1451 chip.
A charging method for 28V/35Ah zinc-silver oxide cell charging system, charging deboost is 40V, comprises the following steps:
(1) be that 0.2A starts charging to zinc-silver oxide cell with charging current, whether inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be greater than 1.95V, be proceed to step (11), otherwise proceed to step (2);
(2) whether charging current forwards 0.4A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be turn as step (11), otherwise proceed to step (3);
(3) charging current forwards 0.6A to, and inspection control circuit patrols and examines monomer battery voltage, and whether detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (10), otherwise proceed to (4);
(4) whether charging current forwards 0.8A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (9), otherwise proceed to step (5);
(5) whether charging current forwards 1A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (8), otherwise proceed to step (6);
(6) charging current forwards 2A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.95V, then proceeds to step (7);
(7) charging current forwards 1A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (8);
(8) charging current forwards 0.8A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (9);
(9) charging current forwards 0.6A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (10);
(10) charging current forwards 0.4A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (11);
(11) charging current forwards 0.2A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (12);
(12) charging terminates.
Described charging current is sinusoidal unidirectional full waveform, and the angle of flow is 9ms.
Beneficial effect of the present invention is: adopt the sinusoidal unidirectional full waveform of angle of flow 9ms to charge to 28V/35Ah zinc-silver oxide cell, adopt the charging strategy optimized to charge to 28V/35Ah zinc-silver oxide cell; " two level ground section characteristics " problem of effective minimizing zinc-silver oxide cell charging process, by routing inspection circuit, can regulate charging strategy at any time, improves zinc-silver oxide cell charge efficiency; By digitlization FPGA platform, battery charging, monomer battery voltage are patrolled and examined combination, automation adjustment charge mode, digital Platform monitors charging process in real time, realizes in charging process, and power-off data keep function, and automatic complete charge, possess intelligent charge ability.
Accompanying drawing explanation
Fig. 1 is zinc-silver oxide cell 2A constant current source charging cell voltage profiles, and charging curve has two level ground section characteristics;
Fig. 2 is principle of the invention block diagram;
Fig. 3 is the circuit diagram of D/A D/A converting circuit in Fig. 2;
Fig. 4 is the oscillogram of charging current of the present invention.
Embodiment
Further describe technical scheme of the present invention below, but described in claimed scope is not limited to.
A kind of 28V/35Ah zinc-silver oxide cell charging system as shown in Figure 2 to 4, comprise power-switching circuit, FPGA signal processor, clock circuit, bus driver, inspection control circuit, D/A D/A converting circuit and A/D signal acquisition circuit, charging system provides operating voltage by power-switching circuit, the signal output part of described clock circuit is connected with the signal input part of FPGA signal processor, the signal output part of described FPGA signal processor by bus driver respectively with inspection control circuit, the signal input part of D/A D/A converting circuit connects, the described signal output part of A/D signal acquisition circuit is connected with the signal input part of bus driver.The signal output part of described A/D signal acquisition circuit is connected with the signal input part of bus driver by optical coupling isolation circuit.Described FPGA signal processor is also connected with memory circuit communication.
Described bus driver is connected with D/A D/A converting circuit by optical coupling isolation circuit; The model of described bus driver is SN54LS245; Described D/A D/A converting circuit adopts LTC1451 chip.
Oxide due to silver has silver oxide and peroxidating money kind valence state, makes battery create height two level ground sections when charge and discharge.The time that high voltage level ground section continues is also closely related with the oxide distribution situation of these silver.Can learn by analyzing zinc-silver oxide cell discharge condition, in fact silver electrode electromotive force depends primarily on the chemical reaction that the place near conductive mesh occurs.
If if silver peroxide is in electric discharge near conductive mesh, what present is exactly the high potential of silver peroxide, is shown below.
2AgO+H
2O+2e＝Ag
2O+2OH
-
If silver oxide is in electric discharge, what present is exactly the low potential of silver oxide.Be shown below.
Ag
2O+H
2O+2e＝2Ag+2OH
-
When using DC charging, due to difficult to depths reaction, silver peroxide mainly concentrates near conductive mesh, and during electric discharge, first these silver peroxides react, thus shows longer high voltage level ground section.Therefore, if change charging modes, make silver peroxide concentrate not too much or be uniformly distributed, the duration of high level level ground section will be reduced during battery charging, even eliminate high level level ground section.
If add the certain interval time after each charge cycle, a buffer time of electrode reaction can be given like this, conductive ion is made to diffuse to form advantage to active material particle depths, electric discharge polarization is utilized to offset part charging polarization, eliminate a part of concentration polarization, reaction depth is strengthened, the distribution of silver peroxide can be made so only to concentrate near conductive mesh, but distribution is more even.And in the electric discharge period, by patrolling and examining the voltage of each cell current, according to monomer voltage change of variable charging current rated value.This charging modes adds the content of silver peroxide accordingly, namely adds charging capacity.
A charging method for 28V/35Ah zinc-silver oxide cell charging system, charging deboost is 40V, can be the pattern of 28V and 12V series connection, comprise the following steps:
(1) be that 0.2A starts charging to zinc-silver oxide cell with charging current, whether inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be greater than 1.95V, be proceed to step (11), otherwise proceed to step (2);
(2) whether charging current forwards 0.4A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be turn as step (11), otherwise proceed to step (3);
(3) charging current forwards 0.6A to, and inspection control circuit patrols and examines monomer battery voltage, and whether detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (10), otherwise proceed to (4);
(4) whether charging current forwards 0.8A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (9), otherwise proceed to step (5);
(5) whether charging current forwards 1A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (8), otherwise proceed to step (6);
(6) charging current forwards 2A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.95V, then proceeds to step (7);
(7) charging current forwards 1A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (8);
(8) charging current forwards 0.8A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (9);
(9) charging current forwards 0.6A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (10);
(10) charging current forwards 0.4A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (11);
(11) charging current forwards 0.2A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (12);
(12) charging terminates.
Described charging current is sinusoidal unidirectional full waveform, and the angle of flow is 9ms.
Charging method of the present invention is realized automatically by FPGA software, and hardware platform comprises D/A D/A converting circuit, A/D signal acquisition circuit, optical coupling isolation circuit, bus driving circuits, inspection control circuit, FPGA signal processor, memory circuit, power-switching circuit, clock circuit composition.D/A D/A converting circuit adopts LTC1451 to produce voltage analog signal; A/D signal acquisition circuit realizes gathering the mode voltage analog signal of a monomer battery voltage, and voltage acquisition scope is 0V to+2.5V, and image data figure place reaches 12; Optical coupling isolation circuit, to the numberization signal of I/O and analog signal isolating, improves the reliability of system; That bus driving circuits adopts is SN54LS245, the voltage signal making the+5.0V signal of FPGA signal processor outside be converted to+3.3V is connected to FPGA signal processor, this circuit is also the Fault Isolation design measure of FPGA signal processor simultaneously, guarantees that the fault of FPGA signal processor can not cause the exception of external interface; Inspection control circuit carries out timesharing to 17 zinc-silver oxide cells to choose, and realizes gathering the mode voltage analog signal of a monomer voltage by A/D signal acquisition circuit; FPGA signal processor adopts hardware description language to realize zinc-silver oxide cell charging strategy; Memory circuit realizes storing the data of 128kB and reading, and stores data after micro control system power-off, does not lose the normal storage and reading of guaranteeing data; Power-switching circuit provides operating voltage 3.3v, 2.5v and 1.2v; Clock circuit provides high-performance FPGA devices function reference frequency.
The present invention adopts the sinusoidal unidirectional full waveform of angle of flow 9ms to charge to 28V/35Ah zinc-silver oxide cell, adopts the charging strategy optimized to charge to 28V/35Ah zinc-silver oxide cell; " two level ground section characteristics " problem of effective minimizing zinc-silver oxide cell charging process, by routing inspection circuit, can regulate charging strategy at any time, improves zinc-silver oxide cell charge efficiency; By digitlization FPGA platform, battery charging, monomer battery voltage are patrolled and examined combination, automation adjustment charge mode, digital Platform monitors charging process in real time, realizes in charging process, and power-off data keep function, and automatic complete charge, possess intelligent charge ability.
Claims (8)
1. a 28V/35Ah zinc-silver oxide cell charging system, comprise power-switching circuit, FPGA signal processor, clock circuit, bus driver, inspection control circuit, D/A D/A converting circuit and A/D signal acquisition circuit, charging system provides operating voltage by power-switching circuit, it is characterized in that: the signal output part of described clock circuit is connected with the signal input part of FPGA signal processor, the signal output part of described FPGA signal processor by bus driver respectively with inspection control circuit, the signal input part of D/A D/A converting circuit connects, the described signal output part of A/D signal acquisition circuit is connected with the signal input part of bus driver.
2. 28V/35Ah zinc-silver oxide cell charging system as claimed in claim 1, is characterized in that: the signal output part of described A/D signal acquisition circuit is connected with the signal input part of bus driver by optical coupling isolation circuit.
3. 28V/35Ah zinc-silver oxide cell charging system as claimed in claim 1, is characterized in that: described bus driver is connected with D/A D/A converting circuit by optical coupling isolation circuit.
4. 28V/35Ah zinc-silver oxide cell charging system as claimed in claim 1, is characterized in that: described FPGA signal processor is also connected with memory circuit communication.
5. 28V/35Ah zinc-silver oxide cell charging system as claimed in claim 1, is characterized in that: the model of described bus driver is SN54LS245.
6. 28V/35Ah zinc-silver oxide cell charging system as claimed in claim 1, is characterized in that: described D/A D/A converting circuit adopts LTC1451 chip.
7., as the charging method of the 28V/35Ah zinc-silver oxide cell charging system as described in arbitrary in claim 1 ~ 6, charging deboost is 40V, it is characterized in that comprising the following steps:
(1) be that 0.2A starts charging to zinc-silver oxide cell with charging current, whether inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be greater than 1.95V, be proceed to step (11), otherwise proceed to step (2);
(2) whether charging current forwards 0.4A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be turn as step (11), otherwise proceed to step (3);
(3) charging current forwards 0.6A to, and inspection control circuit patrols and examines monomer battery voltage, and whether detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (10), otherwise proceed to (4);
(4) whether charging current forwards 0.8A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (9), otherwise proceed to step (5);
(5) whether charging current forwards 1A to, and inspection control circuit patrols and examines monomer battery voltage, detect and have monomer battery voltage to be not less than 1.95V, be proceed to step (8), otherwise proceed to step (6);
(6) charging current forwards 2A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.95V, then proceeds to step (7);
(7) charging current forwards 1A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (8);
(8) charging current forwards 0.8A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (9);
(9) charging current forwards 0.6A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (10);
(10) charging current forwards 0.4A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (11);
(11) charging current forwards 0.2A to, and inspection control circuit patrols and examines monomer battery voltage, until there is monomer battery voltage to be not less than 1.98V, then proceeds to step (12);
(12) charging terminates.
8. the charging method of 28V/35Ah zinc-silver oxide cell charging system as claimed in claim 7, is characterized in that: described charging current is sinusoidal unidirectional full waveform, and the angle of flow is 9ms.
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| CN107994662A (en) * | 2016-02-05 | 2018-05-04 | 广东欧珀移动通信有限公司 | Charging unit, charging method, power supply adaptor and terminal |
| CN112968225A (en) * | 2021-01-29 | 2021-06-15 | 深圳市珈玛纳米技术有限公司 | Zinc-silver battery charging and discharging current waveform generation method and control device |
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