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Pulse charging current sampling control method and system and charger

A technology of current sampling and pulse charging, applied in control/regulation systems, battery circuit devices, high-efficiency power electronic conversion, etc., can solve the problems of increasing circuits, increasing costs, reducing the efficiency of pulse chargers, and improving efficiency and reliability. , the effect of reducing costs

Active Publication Date: 2021-04-16
GUOCHUANG INNOVATION CENTER OF MOBILE ENERGY (JIANGSU) CO.,LTD.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method will also add additional circuits, which will increase additional costs and reduce the efficiency of the pulse charger

Method used

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  • Pulse charging current sampling control method and system and charger
  • Pulse charging current sampling control method and system and charger
  • Pulse charging current sampling control method and system and charger

Examples

Experimental program
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Embodiment 1

[0031] Such as figure 1 As shown, a pulse charging current sampling control method includes the following steps:

[0032] S01: At the trough of each pulse cycle, turn off the switching tube drive, and do not sample the output current;

[0033] S02: At the peak of each pulse cycle, turn on the switch tube drive, sample the output current, and update the control value.

[0034] In a preferred embodiment, S01 also includes timing sampling control of the charging current when the power electronic converter is working in a closed loop.

[0035] In a preferred embodiment, in the step S02, the switching tube is turned on at the beginning of the pulse period.

[0036] In a preferred embodiment, when the pulse reaches a steady state in the step S02, the output current is sampled, the sampled value is input into the controller for calculation, the control value is updated according to the calculation result, and the switch tube is turned off. This can prevent the PI controller from c...

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PUM

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Abstract

The invention discloses a pulse charging current sampling control method and system and a charger, and the method comprises the steps: carrying out the timing sampling control on a charging current during the closed-loop operation of a power electronic converter, switching off driving of a switching tube during the trough of each pulse period, and not carrying out the sampling of an output current; and at the wave crest of each pulse period, starting driving of the switching tube driving, sampling the output current, and updating the control quantity. According to the invention, a single closed-loop mode is adopted to carry out single timing sampling and single timing control in a single pulse period, so that a DC-DC power electronic converter can output high-frequency pulse current close to square waves, and no extra circuit needs to be added.

Description

technical field [0001] The invention belongs to the technical field of battery pulse charging, and in particular relates to a pulse charging current sampling control method, system and charger. Background technique [0002] The charger charges the battery through the power electronic converter, and the closed-loop operation of the power electronic converter needs to sample and control the charging current. Lithium battery pulse charging technology requires the output current to be a high frequency (greater than 1kHz) square wave pulse waveform to achieve the purpose of accelerating charging speed and improving battery life. [0003] The controller of the traditional power electronic converter performs continuous sampling and continuous control on the charging current, so that the charging current reaches a stable value. Since pulse charging needs to output a pulse current with a frequency higher than 1kHz and as close to a square wave as possible, the charging current needs...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02M3/335H02M1/088
CPCY02E60/10
Inventor 张宇探李德胜郑隽一张育铭
Owner GUOCHUANG INNOVATION CENTER OF MOBILE ENERGY (JIANGSU) CO.,LTD.