Transformation controller for charging and discharging lithium ion accumulator as well as transformation control method thereof

A controller, lithium ion technology, applied in battery circuit devices, current collectors, regulating electrical variables, etc., can solve the problems of large size, difficulty in reducing weight, and low work efficiency of the power supply system, and achieve weight reduction, work efficiency improvement, Volume reduction effect

Inactive Publication Date: 2009-01-28
CHINA AEROSPACE TIMES ELECTRONICS CORP NO 771 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional power supply system, due to the use of two sets of DC/DC converters for the charging and discharging ...

Method used

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  • Transformation controller for charging and discharging lithium ion accumulator as well as transformation control method thereof
  • Transformation controller for charging and discharging lithium ion accumulator as well as transformation control method thereof
  • Transformation controller for charging and discharging lithium ion accumulator as well as transformation control method thereof

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] Taking the application of micro-satellite power supply system as an example, the rated power of the power supply system is 100W, and electrical isolation is not required between the DC bus and the battery pack, so it is suitable to use a non-isolated bidirectional DC / DC converter. According to the system requirements, the Buck / Boost type bidirectional DC / DC converter designed by the present invention has a circuit structure diagram as figure 2 shown. Including driving circuit, main circuit, control circuit, switching circuit, constant current to constant voltage auxiliary circuit and auxiliary power supply. The main circuit includes a charge sampling unit at the battery terminal Vb+ and a discharge sampling unit at the bus terminal Vo+. The charging sampling unit is composed of sampling voltage dividing resistors R10, R11 and current...

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Abstract

The invention discloses a transform controller and a transform control method for the charging-discharging of a lithium-ion storage battery. The transform controller comprises an auxiliary power supply connected with a shutoff signal SD1 which is externally input, and a main circuit, wherein a storage battery end of the main circuit is connected with a drain electrode of a switch tube S1 and a source electrode of a switch tube S2 through a power inductor; a drain electrode of the switch tube S2 is connected with a bus end, and control electrodes of the switch tube S1 and the switch tube S2 are connected with the output of a driving circuit; the input of the driving circuit is connected with an output end of a driving signal PWM of a switching circuit; an input end of the switching circuit is respectively connected with an external switching control signal SD2, a charging feedback signal FB1 output by a constant current-to-constant voltage auxiliary circuit, a discharging feedback signal FB2 output by a discharging sampling unit of the bus end, and a normal phase driving signal PWMA output by a control circuit; the other output end of the switching circuit outputs a feedback signal FB to the control circuit; and an input end of the constant current-to-constant voltage auxiliary circuit is connected with a voltage sampling signal Vb and a current sampling signal Ib which are output by a charging sampling unit of the storage battery end.

Description

technical field [0001] The invention relates to an energy conversion and control device for charging and discharging lithium-ion battery packs in a microsatellite power supply system, a solar (wind energy) power generation system, a DC motor drive system, an uninterrupted power supply system, and an electric vehicle. Background technique [0002] The power supply system usually consists of solar battery packs, battery packs, DC / DC converters and shunts. In the traditional power supply system, the DC / DC converter consists of two parts: charging DC / DC and discharging DC / DC converter [ figure 1 (a)]. In the sunny area, the solar battery pack not only supplies power to the load, but also charges the battery through the charging DC / DC converter. In the shadow of the sun, the battery supplies power to the load through a discharging DC / DC converter. [0003] DC / DC converters can be divided into two categories: isolated type and non-isolated type. There are three typical non-isol...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/35H02M3/157
Inventor 段晓飞薛建平
Owner CHINA AEROSPACE TIMES ELECTRONICS CORP NO 771 RES INST
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