How Pulse Chargers Work 10

How does a pulse charger work? Today, when electric vehicles are becoming more and more popular as a means of green travel, their battery life device chargers have also begun to become popular. At present, the common spot chargers on the market are three-stage chargers and pulse chargers, but people have not been very clear about how pulse chargers work.

The pulse charger is a kind of inverter pulse charger, which includes a single-ended flyback switching power supply, pulse power control and voltage high and low control and charging time control software installed in the chip, battery capacity and voltage signal sampler. Single-ended flyback switching power supply is the executive component in the charger, and has a built-in output protection circuit and a high-efficiency driving circuit, which can provide an appropriate size of charging and stopping charging intermittent pulse current to charge the rechargeable battery, and the pulse power supply control and voltage control and charging time control software installed in the chip are the control parts of the charger, which accurately accepts the output signal of the battery capacity and voltage signal sampler when the charger output is turned off, and accurately monitors the capacity and voltage status of the battery itself at any time. The battery capacity and voltage signal sampler is the sensing component of the charger, which samples the capacity and voltage of the rechargeable battery being charged in real time and converts it into a digital signal, and then transmits it to the pulse power supply and voltage control and charging time control software installed in the chip.

When the battery reaches the voltage level that generates the outgassing volume, the output voltage of the adapter is reduced to a set safe low voltage level, and the battery is charged in milliseconds after a few seconds of deactivation. In this way, the output of the charger will be turned off after the set charging time is reached, which will not cause the rechargeable battery to overheat and lose water due to excessive charging current and high voltage, and can also achieve the effect of prolonging the cycle life of the battery.

Charger: A device that charges a battery with energy by applying an electric current to a rechargeable battery. It is a device that converts alternating current into low-voltage direct current.

Pulse charger: An electrical device that charges a rechargeable battery in a pulsed manner. It is differentiated by charging method, which is different from other charging methods, such as:

Hand crank chargers, constant voltage chargers and three-stage chargers with mixed methods (the first stage is called the charging current limiting stage, the second stage is called the high constant voltage stage, and the third stage is called the small current and low constant voltage stage).

According to incomplete statistics, pulse charging is divided into: negative pulse, positive pulse, positive and negative pulse, and can also be divided into low frequency, high frequency and frequency conversion (sweep) and so on.

There are also many forms of charging methods for chargers, including continuous charging (the current is uninterrupted during charging).

And there is another way is intermittent charging (for example: after the current is charged for 2 seconds, the charging is suspended for 1 second, and so on) This is like the pumping of our heart, and it is also like the pulse wave in electronics, so this kind of charging method is called pulse charging. Pulse charging is just a way to charge, and it can't be said whether it's full or not.

<> the above picture is a kind of charger, the device on the panel is basically composed of a voltage selector switch (bottom left), a current adjustment button (middle) and a charging ammeter.

First of all, to charge the battery, it is necessary to understand the rated voltage and capacity of the recharged battery.

The voltage is already known to be 12V, the capacity is unknown, you can check the label of the battery, we assume that the capacity of the battery is 40 Ah hours(AH).

Adjustment method: 1. Before connecting the battery charging cable, turn the voltage selection switch in the lower corner of the group to 12V, and turn the current adjustment button counterclockwise to "off".

2. Turn on the charging cable after connecting it, and the charging ammeter will display "0" at this time. Slowly turn the current adjustment button clockwise, and the ammeter needle will start to clear the source and deflect to the right until it indicates 4A to stop adjusting (the charging current value is multiple of the battery capacity).

Note: This charging current value is called the rate charging method using the multiple of the battery capacity, which is currently internationally recognized as the method of answering the manuscript, although the charging time is longer (the battery may have to be charged for more than 10 hours).

The main function of the charger is to convert the alternating current into direct current and charge the battery. It is necessary to provide rated voltage and current according to requirements, meet the charging characteristics of the battery, adjust the output parameters at any time, and have protection functions, and the conversion process is more complicated.

A pulse is a brief fluctuating electrical shock (voltage or current) like a pulse.

1. Positive pulse: the minimum current is zero, and the maximum is the nominal value.

2. Breathing pulse: charge and stop, the purpose is to give the battery a chance to breathe during the charging process, which can effectively protect the battery and improve the absorption efficiency of the battery.

3. High-frequency pulse: the frequency of the pulse is 3000 times per second.

4. Mixed pulse: there are both high-frequency pulses and low-frequency pulses.

5. Negative pulse: discharge, instantaneous discharge during the charging process, can effectively discharge the virtual electricity, protect the battery, and also improve the absorption effect of the battery.

The pulse charger may be a large pulse, and the traditional charger is not enough for static charging, so you can buy a Qiao Song charging repair instrument.

Pulse charging principle: in the pulse plating process, when the current is turned on, the pulse (peak) current is equivalent to several times or even dozens of times of the ordinary DC current, and it is this instantaneous high current density that reduces the metal ions under the extremely high overpotential, so that the grain of the deposition layer becomes finer; When the current is turned off, the discharge ions near the cathode region return to the initial concentration, and the concentration polarization is eliminated, which is conducive to the continuous use of high pulse (peak) current density at the same time for the next pulse, and at the same time, there are also phenomena such as recrystallization, adsorption and desorption that are beneficial to the deposited layer during the shutdown period. This process runs through the entire electroplating process at the same time, and the mechanisms contained in it constitute the most basic principle of pulse plating.

Advantages of pulse charging:

1. Because the intermittent charging can make the lead-acid battery fully chemically react, it can greatly reduce the gas evolution of the lead-acid battery during the charging process and improve the acceptance capacity of the battery.

Second: pulse charging intermittent charging, such a cycle, will make the lead-acid battery generate a sufficient amount of hydrogen and oxygen during charging, these two gases are reduced to electrolyte under the action of charging, this process can not only reduce the side reaction of the battery, but also have a recovery effect on the phenomenon of failure caused by polarization of the lead-acid battery.

Three: the pulse charger can shorten the charging time, and has the effect of cooling, so you will not feel the battery when you hit the battery and fully charge; Pulse chargers can also extend the life of the battery and be safer.

Four: Pulse charging can also prevent the battery from being charged: It uses a unique technology pulse charging technology and high-tech technology of temperature compensation to prevent your battery from being charged.

Five: The pulse charger also has an intelligent shutdown function, which will automatically stop when the battery is fully charged, so you don't have to wait for it to charge.

Pulse fast charging is to use pulse current to quickly charge the battery, pulse charging is divided into: negative pulse, positive pulse, positive and negative pulse, can also be divided into low frequency, high frequency and frequency conversion (sweep) and so on.

The negative pulse discharges the battery intermittently when charging. Theoretically, the polarization voltage generated in the battery during charging will hinder its own charging, especially in the later stage of fast charging, so that the outgassing rate and temperature rise will increase significantly, and the magnitude of the polarization voltage will change with the change of charging current.