CN110854960A - Frequency change pulse charging method and system for lead-acid battery - Google Patents
Frequency change pulse charging method and system for lead-acid battery Download PDFInfo
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- CN110854960A CN110854960A CN201911185871.4A CN201911185871A CN110854960A CN 110854960 A CN110854960 A CN 110854960A CN 201911185871 A CN201911185871 A CN 201911185871A CN 110854960 A CN110854960 A CN 110854960A
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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
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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 relates to the field of lead-acid batteries, in particular to a frequency change pulse charging method and system for a lead-acid battery. A frequency variation pulse charging method of a lead-acid battery comprises the following steps: the lead-acid battery is charged by adopting pulse electric energy with large current and high duty ratio; and reducing the duty ratio of the pulse electric energy in stages according to the voltage rise of the lead-acid battery. Compared with the prior art, the invention has the beneficial effects that through the frequency change pulse charging method and system of the lead-acid battery, the lead-acid battery is charged by adopting the pulse electric energy with large current and high duty ratio, the temperature of the lead-acid battery is rapidly increased, the electric energy of the lead-acid battery is recovered, and the lead-acid battery enters a high-efficiency charging stage; meanwhile, the lead-acid battery is subjected to electric energy impact through pulse electric energy, and the attached crops on the polar plate are cleared through high-frequency oscillation, so that the attached crops can reenter the chemical reaction of the lead-acid battery.
Description
Technical Field
The invention relates to the field of lead-acid batteries, in particular to a frequency change pulse charging method and system for a lead-acid battery.
Background
A lead-acid battery is a storage battery with electrodes mainly made of lead and its oxides and electrolyte solution of sulfuric acid solution. In the discharge state of the lead-acid battery, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead; in a charged state, the main components of the positive electrode and the negative electrode are lead sulfate.
The service life of the lead-acid battery is influenced by a plurality of factors, such as temperature, charging and discharging conditions, use conditions and the like, and the service life of the lead-acid battery is prolonged along with the rise of the temperature. The temperature is increased by 1 ℃ per liter between 10 ℃ and 35 ℃, 5-6 cycles are increased approximately, the service life can be prolonged by more than 25 cycles at the temperature of 35 ℃ to 45 ℃ per liter when the temperature is increased by 1 ℃, and the service life is reduced due to the loss of the vulcanization capacity of the negative electrode when the temperature is higher than 50 ℃. And, lead-acid batteries, when used for a long period of time or not, may have dirt adhered to the plates, resulting in a decrease in electric capacity and a deterioration in electrical conductivity.
Therefore, in the charging process, the temperature of the lead-acid battery should be effectively controlled, and at the same time, it should be ensured that the lead-acid battery can be effectively charged to make the electric energy full, which is a problem that the skilled person always needs to research.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a system for charging a lead-acid battery with frequency variation pulses, aiming at the above-mentioned defects in the prior art, so as to solve the problems of difficult temperature control, low charging efficiency, difficult electric energy saturation, etc. of the lead-acid battery during the charging process.
The technical scheme adopted by the invention for solving the technical problems is as follows: a frequency change pulse charging method of a lead-acid battery is provided, which comprises the following steps:
the lead-acid battery is charged by adopting pulse electric energy with large current and high duty ratio;
and reducing the duty ratio of the pulse electric energy in stages according to the voltage rise of the lead-acid battery.
Wherein, the preferred scheme is, still include the step:
setting a plurality of charging stages, wherein each charging stage is matched with a voltage value range, and each charging stage is matched with a duty ratio value;
at the beginning, pulse electric energy with large current and high duty ratio is adopted to charge the lead-acid battery;
and selecting the duty ratio pulse electric energy corresponding to the charging stage according to the voltage range of the lead-acid battery voltage to charge the lead-acid battery.
Preferably, the charging phase includes a hydroxide ion precipitation phase, and the step of the frequency-varying pulse charging method includes:
judging whether a charging stage enters a hydroxide ion precipitation stage according to the voltage of the lead-acid battery;
the duty cycle of the pulsed electrical energy is reduced.
Wherein, the preferred scheme is: the charging stage comprises a floating charging stage, and the frequency variation pulse charging method comprises the following steps:
judging whether a charging stage enters a floating charging stage according to the voltage of the lead-acid battery;
pulling high pulse power voltage to charge the lead-acid battery;
and reducing the pulse electric energy voltage in a staged manner until the lead-acid battery is fully charged.
Wherein, the preferred scheme is: the frequency change pulse charging method adopts a heavy current constant current to charge the lead-acid battery.
Wherein, the preferred scheme is: the duty cycle of the pulsed electrical energy at the start phase is 96% to 98%.
Wherein, the preferred scheme is: before the lead-acid battery enters the next charging stage, the lead-acid battery is charged for a preset time temporarily, and then the lead-acid battery is charged again.
The technical scheme adopted by the invention for solving the technical problems is as follows: the frequency change pulse charging system of the lead-acid battery comprises a transformer circuit, a power supply output end and a pulse management circuit connected between the transformer circuit and the power supply output end in parallel, wherein the pulse management circuit outputs a pulse signal according to the frequency change pulse charging method.
Wherein, the preferred scheme is: the pulse management circuit comprises a pulse management chip and a pulse output circuit, wherein the pulse management chip outputs a pulse signal through the pulse output circuit.
Compared with the prior art, the invention has the beneficial effects that through the frequency change pulse charging method and system for the lead-acid battery, the lead-acid battery is charged by adopting the pulse electric energy with large current and high duty ratio, the temperature of the lead-acid battery is rapidly increased, the electric energy of the lead-acid battery is recovered, and the lead-acid battery enters an efficient charging stage. Meanwhile, through pulse electric energy, electric energy impact is carried out on the lead-acid battery, the attached crops on the polar plate are clear through high-frequency oscillation, the attached crops are enabled to re-enter the chemical reaction of the lead-acid battery, honeycomb holes of the polar plate can be punched through, the charging efficiency and the battery capacity upper limit of the lead-acid battery are further improved, the overall performance is improved, and on the premise that high-current high-efficiency charging is kept, the duty ratio of the pulse electric energy is reduced, the internal pressure of the lead-acid battery can be greatly relieved, the charging heat is reduced, the temperature of the lead-acid battery is maintained within a preset range, the service life of the lead-acid battery is prolonged, the lead-acid battery can be prevented from being overheated to enter a temperature.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic flow chart of a frequency varying pulse charging method according to the present invention;
FIG. 2 is a schematic flow chart of a frequency-varying pulse charging method according to the present invention;
FIG. 3 is a schematic circuit diagram of a frequency varying pulse charging system according to the present invention;
FIG. 4 is a schematic diagram of a motherboard circuit of the frequency varying pulse charging system of the present invention;
FIG. 5 is a schematic diagram of a pulse management circuit of the frequency varying pulse charging system of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a preferred embodiment of a frequency varying pulse charging method for lead acid batteries.
A frequency variation pulse charging method of a lead-acid battery comprises the following steps:
step S11, charging the lead-acid battery by adopting the pulse electric energy with large current and high duty ratio;
and step S12, reducing the duty ratio of the pulse electric energy in stages according to the rising of the lead-acid battery voltage.
Specifically, in the charging process of the lead-acid battery, not only is it considered that the charging efficiency of the lead-acid battery is high under the condition that the lead-acid battery needs to be at a specific temperature, but also the service life is properly prolonged, and the temperature in the charging process is increased continuously, so that the lead-acid battery is easily overheated, the service life is reduced, and even the temperature imbalance causes damage and even explosion. Therefore, in the stage of just charging, the lead-acid battery is charged by adopting the pulse electric energy with large current and high duty ratio, the temperature of the lead-acid battery is rapidly increased, the electric energy of the lead-acid battery is recovered, and the lead-acid battery enters the stage of high-efficiency charging. Meanwhile, through pulse electric energy, electric energy impact is carried out on the lead-acid battery, the attached crops on the polar plate are clearly oscillated at high frequency, the attached crops enter the chemical reaction of the lead-acid battery again, the honeycomb holes of the polar plate can be punched, the charging efficiency and the battery capacity upper limit of the lead-acid battery are further improved, and the overall performance is improved, for example, sulfides on the lead plate or large-particle substances inside the lead plate are dissolved and added into the chemical reaction of the lead-acid battery.
Then, because the temperature of the charging process can rise continuously, if the temperature needs to rise continuously according to the change of the voltage of the lead-acid battery, the duty ratio of the pulse electric energy is reduced stage by stage, on the premise of keeping high-current high-efficiency charging, the duty ratio of the pulse electric energy is reduced, the internal pressure of the lead-acid battery can be greatly relieved, and the charging heat is reduced, so that the temperature of the lead-acid battery is maintained in a preset range, the service life of the lead-acid battery is prolonged, and the lead-acid battery can be prevented from being overheated to enter a temperature imbalance state to cause unnecessary loss.
In the present embodiment, the high duty ratio refers to a duty ratio of a pulsed high voltage with respect to a pulsed low voltage.
In this embodiment, the frequency variation pulse charging method uses a large constant current to charge the lead-acid battery.
In this embodiment, and referring to fig. 2, the frequency variation pulse charging method further includes:
step S21, setting a plurality of charging stages, wherein each charging stage is matched with a voltage value range, and each charging stage is matched with a duty ratio value;
step S22, charging the lead-acid battery by adopting pulse electric energy with large current and high duty ratio at the beginning;
and step S23, selecting the duty ratio pulse electric energy corresponding to the charging stage to charge the lead-acid battery according to the voltage range of the lead-acid battery voltage.
Specifically, the lead-acid battery has a plurality of charging stages in the charging process, and each charging stage has characteristics and optimal charging requirements so as to maintain the temperature, the charging efficiency and the service life of the lead-acid battery unaffected or even optimize the charging efficiency and the service life. Therefore, each charging stage is matched with a voltage value range, and each charging stage is matched with a duty ratio value, generally speaking, a plurality of charging stages are judged according to voltage and sorted according to voltage, after one charging stage is completed, the next charging stage is entered, preferably, the higher the voltage of the lead-acid battery in the charging process is, the more the lead-acid battery is, the next charging stage is, and each charging stage of the lead-acid battery, which substantially enables the temperature to be more easily increased, or the temperature to be higher, the duty ratio value of the lead-acid battery should be lower.
In this embodiment, a preferred scheme of several charging phases is provided.
Scheme one, start phase. The initial stage is the condition that the electric quantity of the lead-acid battery is insufficient, or the internal chemical substance of the lead-acid battery is inactive, and the lead-acid battery is not suitable for charging at the normal temperature. The lead-acid battery is charged by adopting the pulse electric energy with large current and high duty ratio, the temperature of the lead-acid battery can be improved, the battery can be rapidly awakened, the battery enters a charging chemical reaction, the electric quantity is rapidly recovered, the lead-acid battery rapidly processes the temperature suitable for charging, and the service life is prolonged. Preferably, the duty cycle of the pulsed electrical energy of the start phase is 96% to 98%, preferably 97%.
Scheme two, a fast charging phase. The phase is the phase that the lead-acid battery can be charged quickly, and the charging of electric energy can be realized quickly because the temperature and the activity of the lead-acid battery are in the optimal state.
Scheme three, hydroxide ion precipitation stage. The hydroxyl ion precipitation stage is that the lead-acid battery generates oxygen ion precipitation and hydrogen ion precipitation phenomena before and after long-time chemical reaction (essentially, the separation of hydroxyl ions is caused by water electrolysis), and even the subsequent well blowout phenomenon can cause overlarge internal pressure and rapid temperature rise. Therefore, the charging stage is judged to enter a hydroxide ion precipitation stage according to the voltage of the lead-acid battery, and the duty ratio of pulse electric energy is reduced.
Scheme four, floating charge stage. The floating charging stage is the final charging stage of the battery, the lead-acid battery is ready to be fully charged, at the moment, in order to prevent the lead-acid battery from being not fully charged due to the virtual electric quantity of the lead-acid battery, the charging stage is judged to enter the floating charging stage according to the voltage of the lead-acid battery, the pulse electric energy voltage is pulled up to charge the lead-acid battery, the pulse electric energy is filled into the lead-acid battery, and the electric quantity upper limit is improved. Meanwhile, on the premise of improving the charging efficiency in the floating charging stage, the over-high temperature is prevented, and the pulse electric energy voltage is reduced in a staged manner until the lead-acid battery is fully charged.
In this embodiment, before the lead-acid battery enters the next charging stage, the lead-acid battery is charged for a preset time, and then the lead-acid battery is charged again. And the whole charging work is alleviated, so that the temperature of the lead-acid battery is reduced or the controllable range is recovered.
As shown in fig. 3, the present invention provides a preferred embodiment of a frequency varying pulse charging system for lead acid batteries.
A frequency variation pulse charging system of a lead-acid battery comprises a transformer circuit 100 and a power output end, and a pulse management circuit 300 connected between the transformer circuit 100 and the power output end 200 in parallel, wherein the pulse management circuit 300 outputs a pulse signal according to the frequency variation pulse charging method.
One end of the ac-dc converter circuit is connected to the commercial power 10, converts the ac power of the commercial power 10 into dc power and outputs the dc power to the first input terminal of the transformer circuit 100, and transmits the electric power to the power output terminal 200 through the first output terminal of the transformer circuit 100, so as to charge the lead-acid battery 20 connected to the power output terminal 200. The pulse management circuit 300 converts the ac power output by the first output terminal of the transformer circuit 100 into a pulse voltage, and outputs the pulse voltage to the lead-acid battery 20 through the power output terminal 200.
Specifically, the pulse management circuit 300 includes a pulse management chip 311 and a pulse output circuit 320, and the pulse management chip 311 outputs a pulse signal through the pulse output circuit 320. Referring to fig. 5, the pulse output terminal 311 of the pulse management chip 311 is connected in parallel to the first positive terminal of the transformer circuit 100 and the positive output terminal of the power output terminal 200 through the pulse output circuit 320, and the CSS terminal thereof is connected to the first negative terminal of the transformer circuit 100 through the pulse output circuit 320, so as to control the first output terminal of the transformer circuit 100 by the pulse management chip 311.
Preferably, the spectrum management chip 421 has a model of AXT-600.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather as embodying the invention in a wide variety of equivalent variations and modifications within the scope of the appended claims.
Claims (9)
1. A frequency change pulse charging method of a lead-acid battery is characterized by comprising the following steps:
the lead-acid battery is charged by adopting pulse electric energy with large current and high duty ratio;
and reducing the duty ratio of the pulse electric energy in stages according to the voltage rise of the lead-acid battery.
2. The frequency varying pulse charging method of claim 1, further comprising the steps of:
setting a plurality of charging stages, wherein each charging stage is matched with a voltage value range, and each charging stage is matched with a duty ratio value;
at the beginning, pulse electric energy with large current and high duty ratio is adopted to charge the lead-acid battery;
and selecting the duty ratio pulse electric energy corresponding to the charging stage according to the voltage range of the lead-acid battery voltage to charge the lead-acid battery.
3. The frequency varying pulse charging method of claim 2, wherein the charging phase comprises a hydroxide ion extraction phase, the steps of the frequency varying pulse charging method comprising:
judging whether a charging stage enters a hydroxide ion precipitation stage according to the voltage of the lead-acid battery;
the duty cycle of the pulsed electrical energy is reduced.
4. The frequency varying pulse charging method of claim 2, wherein: the charging stage comprises a floating charging stage, and the frequency variation pulse charging method comprises the following steps:
judging whether a charging stage enters a floating charging stage according to the voltage of the lead-acid battery;
pulling high pulse power voltage to charge the lead-acid battery;
and reducing the pulse electric energy voltage in a staged manner until the lead-acid battery is fully charged.
5. The frequency varying pulse charging method of claim 1, wherein: the frequency change pulse charging method adopts a heavy current constant current to charge the lead-acid battery.
6. The frequency varying pulse charging method of claim 1, wherein: the duty cycle of the pulsed electrical energy at the start phase is 96% to 98%.
7. The frequency varying pulse charging method of claim 2, wherein: before the lead-acid battery enters the next charging stage, the lead-acid battery is charged for a preset time temporarily, and then the lead-acid battery is charged again.
8. A frequency change pulse charging system of a lead-acid battery is characterized in that: the frequency varying pulse charging system comprises a transformer circuit and a power supply output terminal, and a pulse management circuit connected in parallel between the transformer circuit and the power supply output terminal, the pulse management circuit outputting a pulse signal according to the frequency varying pulse charging method as claimed in any one of claims 1 to 6.
9. The frequency varying pulse charging system of claim 7, wherein: the pulse management circuit comprises a pulse management chip and a pulse output circuit, wherein the pulse management chip outputs a pulse signal through the pulse output circuit.
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Cited By (3)
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| CN112164836A (en) * | 2020-09-14 | 2021-01-01 | 威海安屯尼智能电子科技有限公司 | Pulse charging method, device and system |
| CN113839440A (en) * | 2021-08-31 | 2021-12-24 | 蜂巢能源科技(无锡)有限公司 | Battery charging method and device, computer readable storage medium and processor |
| CN115940364A (en) * | 2023-03-02 | 2023-04-07 | 北京进发新能源科技有限公司 | High-voltage variable-frequency pulsating charging system |
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Application publication date: 20200228 |