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A Battery Charge and Discharge Circuit Topology

A charging and discharging circuit and storage battery technology, applied in the electrical field, can solve the problems of unable to discharge the power grid, and achieve the effects of small harmonic pollution, wide output voltage range, and high charging and discharging efficiency

Active Publication Date: 2015-08-05
XIAN ACTIONPOWER ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Taking the resonant converter topology mentioned in this article as an example, as Figure 4 As shown, the H-bridge soft switching is realized through LC resonance, and then the charging control is realized through diode rectification, and the power grid cannot be discharged.

Method used

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  • A Battery Charge and Discharge Circuit Topology
  • A Battery Charge and Discharge Circuit Topology
  • A Battery Charge and Discharge Circuit Topology

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Such as figure 1 Shown is a circuit diagram of the present invention, which includes: a first-stage circuit, a second-stage circuit and a DSP controller.

[0029] Such as figure 2 As shown, the first-level circuit includes a three-phase AC grid (e a 、e b 、e c ), the filter inductance (L a , L b , L c ), inverter circuit. The inverter circuit is composed of six transistors V1, V2, V3, V4, V5, and V6 of the three-phase bridge. After the three phases of the power supply are connected in star form, each phase output is passed through the filter inductor L a , L b , L c Then connect to the three bridge arms of the three-phase bridge.

[0030] Such as image 3 As shown, the second stage circuit includes a first DC-DC conversion circuit, a transformer, a second DC-DC conversion circuit, a filter capacitor, and a battery;

[0031] The high-voltage bus a...

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Abstract

The invention relates to storage battery charge and discharge circuit topology which comprises a first stage of circuit, a second stage of circuit and a digital signal processor (DSP) controller; the first stage of circuit comprises three phases of alternating current power grids and an inverter circuit; the inverter circuit is provided with six transistors of a three-phase bridge, and the second stage of circuit comprises a first conversion circuit, a transformer, a second conversion circuit and a battery; and the DSP controller controls the output voltage, the output current and the switching direction of the inverter circuit and two direct current-direct current (DC-DC) conversion circuits so as to control the charge or the discharge of the whole circuit. After the device is adopted, charge and discharge with unit power factor can be realized for a power grid side; the pollution to the power grid is little; through a certain control method, a pulse width modulation (PWM) rectifier can realize a scalable vector graphics (SVG) function; the output of a wide voltage scope can be realized; and the charge and discharge efficiency is higher.

Description

Technical field: [0001] The invention belongs to the electrical field, and in particular relates to a battery charging and discharging circuit topology. Background technique: [0002] Previous charging and discharging devices generally adopt several topologies mentioned in the article "Qin Haihong, Zhu Deming and Yan Yangguang, Design Considerations of Electric Vehicle Charger Circuit Topology. Power Supply Technology Application, 2004(2): Page 97-104." Topologies rarely perform both functions of charging and discharging the battery (energy fed back to the grid) at the same time. [0003] Taking the resonant converter topology mentioned in this article as an example, as Figure 4 As shown, the H-bridge soft switching is realized through LC resonance, and then the charging control is realized through diode rectification, and the power grid cannot be discharged. Invention content: [0004] In view of the above defects or deficiencies, the purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/02H02J7/04
Inventor 王跃郭海平黄珺高远
Owner XIAN ACTIONPOWER ELECTRIC