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Automatic equalizing charging device for series-connected battery set

A technology of series-connected battery packs and automatic equalization, applied in battery circuit devices, circuit devices, electric vehicles, etc., can solve the problem of sacrificing charging efficiency, and achieve the effect of high charging efficiency, high efficiency and fast charging speed.

Inactive Publication Date: 2002-09-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires more precise control of the bypass current and sacrifices a certain charging efficiency.

Method used

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  • Automatic equalizing charging device for series-connected battery set
  • Automatic equalizing charging device for series-connected battery set
  • Automatic equalizing charging device for series-connected battery set

Examples

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Embodiment Construction

[0025] The implementation of the present invention will be further described below in conjunction with actual examples.

[0026] The series-connected battery pack 1 of lithium-ion power batteries to be charged is composed of 84 single cells, each cell has a capacity of 55Ah (Ah·hour), and the maximum charging current I M , The highest terminal voltage of the battery V M It is 4.15V. The two ends of each cell of the battery pack are connected to the battery voltage signal real-time acquisition and isolation amplifier circuit 2 and the discharge network 5 through wires. The isolation amplifier circuit 2 sends the voltage signal to the main control board 3 after photoelectric isolation. The charging power supply 4 is an inverter-type charging power supply with a maximum output power of 3.5Kw and an output current of 0-10A. The positive output terminal of the charging power source 4 is connected to the positive input terminal of the battery pack, and the negative output terminal is co...

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PUM

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Abstract

The present invention is an automatic equalizing charge device which uses discharging network formed by MOS tube connecting with power resistance in series to replace power switch and bypass flow network formed by it to execute the automatic equalizing charge for series battery group in quick and safe way with in existing equalizing charge technique including series battery group waiting for charge, real time collecting and isolation circuit for battery voltage signal, main control circuit board, contravariant charging power source, patrol inspection and indication circuit of battery voltage,temperature transducer, isolation driving circuit, power source and bypass flow network formed by it.

Description

(1) Technical field [0001] The invention relates to an automatic equalization charging device for series-connected battery packs in various fields such as electric vehicles. (2) Background technology [0002] Batteries are widely used in various fields, especially in electric vehicles in recent years, power batteries such as lithium-ion batteries, nickel-hydrogen batteries, etc. are regarded as one of the key components. When charging these battery packs operating in series, how to ensure the fast and efficient automatic equalization of the battery pack during the charging process is a key to ensure the safety and reliability of lithium-ion batteries and nickel-hydrogen batteries and to give full play to their performance. technology. [0003] In a known series battery pack charging device, the DC or pulsating output of the charging power supply charges the series battery pack. The output voltage and current are adjustable. The device cannot detect and control the terminal voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 齐铂金宫学庚冯涌波吴红杰
Owner BEIHANG UNIV
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