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A two-way balancing system and method for an electric storage device

A technology for balancing systems and power storage devices, which can be applied to circuit devices, charge balancing circuits, battery circuit devices, etc., and can solve problems such as only one-way balancing

Active Publication Date: 2018-09-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of only one-way equalization in the prior art, to realize two-way equalization of the storage device, and to achieve power from the battery module itself or an external low-voltage power supply during charging equalization

Method used

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  • A two-way balancing system and method for an electric storage device

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Embodiment Construction

[0026] like figure 1 As shown, the present invention includes a battery module, a first isolating switch, a second isolating switch, a third isolating switch, a low-voltage power supply, a DC / DC module, a charging control module, an integrated chip and a load, and the load is a power consumption resistor. The active and passive balance of the battery module is realized through the above three sets of isolating switches, DC / DC modules, charging control modules, integrated chips, and energy consumption resistors. When the integrated chip detects that the voltage or SOC of a single battery in the battery module is too high, the integrated chip controls the second isolating switch to switch to the discharge mode. At this time, the charging control module stops working, and the integrated chip controls the first isolating switch and the second isolating switch. , The voltage unit to be discharged and the energy consumption resistor form a loop to achieve discharge balance.

[0027...

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Abstract

The invention relates to a bidirectional balance system and method for a storage battery. A resistance type balancer is taken as the foundation; then the resistance type balancer is combined with three isolating switches, a lithium battery charging control module and a DC / DC converter; and the selectivity of the to-be-balanced single battery and the bidirectional energy balance are realized. The invention aims to solve the problem that only one-way balance can be realized in the prior art; the bidirectional balance of the storage battery can be realized in the invention; and in addition, power can be obtained from the battery module or the external low-voltage power supply in the charging balance process.

Description

technical field [0001] The present application relates to a system and method for equalizing an electric storage device, in particular to a two-way equalizing system and method for an electric storage device. Background technique [0002] At present, judging from the research status at home and abroad, according to the energy storage or energy consumption components selected by the equalization circuit, lithium-ion battery equalizers are essentially divided into resistive equalizers, capacitive equalizers, and inductive equalizers. equalizers and transformer equalizers. Among them, the capacitive equalizer and the inductive equalizer are equalized through the voltage difference of the single cells, but due to the small voltage difference between the single cells and the conduction voltage drop of the switching device, it is difficult to equalize the energy. Transfer, not even transferable. In addition, the equalization circuits of general capacitive and inductive equalizer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH01M10/441H02J7/0016H02J7/0019Y02E60/10
Inventor 李军求
Owner BEIJING INSTITUTE OF TECHNOLOGYGY