Impulse type charging method and device

Abstract

The invention relates to an impulse type charging method which comprises the steps that the output voltage of a charger is reduced, so that the output voltage of the charger is lowered to the voltage at the battery end; at this time, electric energy stored in a capacitive element in another device in parallel connection with a battery charges the battery, so that the voltage of the capacitive element is also lowered to the voltage at the battery end, and absorption of impulses by the capacitive element is eliminated; a negative impulse discharging loop is controlled to be switched on, so that a negative impulse is formed and used for discharging the battery, and polarization of the battery in the charging process is eliminated; the output voltage of the charger is increased, so that the output voltage of the charger is higher than the voltage at the battery end, and the battery is charged. In this way, charging efficiency is improved.

Description

technical field [0001] The invention relates to the electrical field, in particular to a pulse charging method and device. Background technique [0002] In the prior art, although pulse charging has superior performance compared to constant current charging, there are not many products in the market, and chargers that truly have the function of pulse charging are very expensive. There are two reasons for this. : [0003] The hardware chargers such as 3842 and 324 are commonly used to realize the pulse function, and the circuit is often very complicated, which will greatly increase the cost of the charger on the one hand, and on the other hand, it is often difficult to control the front and rear edges of the pulse. , the result of hard switching is that the pulse effect is often absorbed by the capacitive components in the charging circuit (such as the capacitor in the controller in the electric vehicle) and weakened. [0004] Even if the MCU is added to the low-voltage sid...

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Problems solved by technology

[0003] The hardware chargers such as 3842 and 324 are commonly used to realize the pulse function, and the circuit is often very complicated, which will greatly increase the cost of the charger on the one hand, and on the other hand, it is often difficult to control the front and rear edges of the pulse. , the result of hard switching is that the pulse effect is often absorbed by the capacitive components in the charging circuit (such as the capacitor in the controller in the electric vehicle) and weakened

[0004] Even if the MCU is added to the low-voltage side to form a pulse with an ideal waveform through the program, compared with the current continuous pulse charging method, since the average charging current is the arithmetic mean value of the maximum value of the pulse current and the minimum value of the pulse current, the maximum value of a pulse current For 3.5A chargers, the average charging current is often only about 1.5A~2A. In order to obtain a large peak current charger power margin, it is often necessary to obtain a high manufacturing cost, which cannot adapt to the pulse charging of large-capacity batteries. need

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