Accumulator battery voltage balancer

A battery pack and voltage equalization technology, which is applied to battery circuit devices, collectors, electric vehicles, etc., can solve the problems of frequent switching, arc generation, and difficulty in high-frequency switching, and achieve the effect of avoiding arc generation

Inactive Publication Date: 2011-04-20
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the energy dissipation type, this solution saves energy, but if this method uses a mechanical switch, the switch must be switched frequently during the equalization charging process, and it is difficult to meet the requirements of high-frequency switching, and when the circuit is turned on instantaneously, it will generate Arcing causes contact ablation; if an electronic switch is used, the switch itself has a voltage drop, and the balanced charging effect of the electronic switch battery pack is poor

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] The voltage equalizer of the present invention adopts an energy transfer type equalizing charging method to realize voltage equalization. Such as image 3 As shown, the voltage equalizer of the embodiment of the present invention includes an energy transfer carrier 301, a two-stage switch, an equalization control system 302, and an equalization object: series battery packs B1-B4 (hereinafter referred to as battery packs), and the energy transfer carrier 301 is controlled by a super A capacitor (also called a capacitor battery) C and a current-limiting resistor RM may be used, and other media with large capacitance and capable of rapid charging and discharging may also be used. According to the voltage amplitude and balance capacity requirements of a single battery (ie, a battery), several supercapacitors can be connected in series and p...

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Abstract

The invention discloses an accumulator battery voltage balancer which comprises an accumulator battery, an energy transfer carrier (301), a balance control system (302) and switches of two stages, wherein the energy transfer carrier (301) is a medium which can be charged and discharged; and switches of two stages comprise a primary switch and a secondary switch. Aiming at solving the problem of switch selection in the energy transfer type balance method, a balanced charge circuit comprising switches of two stages and one energy transfer carrier as well as a perfect control strategy are designed, thereby preventing the switches from arcing in the switching process and preventing the balance effect from being influenced by pressure drop of switching tubes.

Description

technical field [0001] The invention relates to the field of storage batteries, in particular to a voltage equalizer for battery packs. Background technique [0002] Batteries are widely used in military, aerospace, industrial and agricultural production, communications, UPS (Uninterruptible Power Supply, uninterruptible power supply), electric vehicles, new energy storage and other fields. Due to the limited voltage capacity of a single battery, generally multiple single batteries connected in series to meet voltage requirements. When a series battery pack is discharged, the battery cell with the lowest voltage is the most likely to be over-discharged, and conversely, when the series-connected battery pack is charged, the battery cell with the highest voltage is the most likely to be overcharged. With the cyclic use of charge and discharge, the inconsistency among battery packs becomes more and more serious, resulting in the battery pack's service life being significantly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 杜海江丑丽丽钟诚杨明皓
Owner CHINA AGRI UNIV
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