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Topological circuit suitable for accumulator battery all-round property testing

A technology for comprehensive performance testing and battery packs, applied in the field of testing, can solve problems such as difficulty in meeting charging and discharging current ripples, reducing the system response speed by filters, and reducing the credibility of test results, so as to improve energy conversion efficiency and power consumption. The effect of low, low power consumption

Inactive Publication Date: 2008-03-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the extremely small internal resistance of the battery pack, whether the PWM rectifier conversion technology or the traditional thyristor full-control rectifier conversion technology is used, even if the filtering effect of the filter is fully considered, the ripple coefficient on the DC side will still be large, and The filter also reduces the responsiveness of the system
Therefore, it is difficult to directly adopt PWM rectifier conversion technology or thyristor full-control rectifier conversion technology to meet the requirements of small charge and discharge current ripples in the comprehensive performance test of battery packs, which will greatly affect the test results of dynamic performance indicators such as instantaneous limit power. , reducing the credibility of test results

Method used

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  • Topological circuit suitable for accumulator battery all-round property testing
  • Topological circuit suitable for accumulator battery all-round property testing
  • Topological circuit suitable for accumulator battery all-round property testing

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Embodiment Construction

[0019] The basic idea of ​​the present invention is to form a charging and discharging circuit with a voltage source and a current source connected in series with the battery pack to be tested. During charging and discharging operation, the voltage source provides a voltage equivalent to that of the battery pack to ensure that the current source works normally at a minimum The voltage drop, generally around 10V, minimizes the power consumption of the current source and improves the energy conversion efficiency of the entire test system. The present invention has the following characteristics: 1. high voltage, high current (such as 500V / 500A, 225kW) output capability; 2. voltage and current are all adjustable in the full range; Adjusting and stabilizing to a given value); ④The DC current ripple is less than 0.2%, rather than the usual average current or effective value; ⑤With bidirectional current conversion capability, energy can be fed back to the grid; ⑥When using a new type ...

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Abstract

The provided technical solution is: it comprises a linearly-regulating current source circuit, a dual-direction variable current voltage source circuit, a battery pack polarity switching circuit and a control circuit; said circuits are series-connected to the battery pack to construct a charging-discharging circuit; said linear regulator is composed of field effect tube Q, and is series-connected in the charging-discharging circuit; its grid electrode is connected to the control circuit. Said battery pack polarity switching circuit is composed of 4 thyristors to form a bridge circuit; the c, d ends of the bridge arm are connected to the battery pack under test; a, b ends are connected in the charging -discharging circuit; the triggering electrodes of said 4 thyristors are connected to the control circuit.

Description

technical field [0001] The invention relates to an improved comprehensive performance test circuit for storage battery packs, which is suitable for comprehensive performance testing of storage battery packs with high voltage, high current and high power, and belongs to the technical field of testing. Background technique [0002] The battery pack comprehensive performance test system is a test system for large-capacity, high-energy-density battery packs and supercapacitor packs (such as power battery packs for electric vehicles, energy storage capacitors in distributed energy systems, and storage battery packs and supercapacitor packs for other industries). It is an important test tool for static properties such as capacity, charge retention capacity, energy density, power density, and cycle life, as well as dynamic properties such as instantaneous limit power, internal resistance, and single-cell voltage consistency. Important equipment affected by the supercapacitor bank. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 颜湘武曲伟韩志军谷建成董清张丽霞康伟张波谷晓斌王金省李和明
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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