Bidirectional equalization circuit

A technology of equalizing circuits and circuits, which is applied in the direction of charge equalizing circuits, circuit devices, battery circuit devices, etc., can solve the problems of no two-way equalizing circuit, single equalizing, etc., and achieve the effect of improving equalizing efficiency, reducing cost and volume

Inactive Publication Date: 2016-08-24
ANHUI RNTEC TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a two-way equalization circuit, which overcomes the problem that there is no two-way equalization circuit in the prior art, and the equalization is relatively simple, and realizes the two-way equalization of the high and low voltages of the circuit battery

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  • Bidirectional equalization circuit

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Embodiment Construction

[0020] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0021] The present invention provides a bidirectional equalization circuit. The bidirectional equalization circuit includes: a micro control unit, an equalization switch array 1, a passive equalization circuit and an active equalization circuit. The micro control unit is configured to be respectively connected to the equalization switch array 1, the passive equalization circuit circuit, an active equalization circuit, and a plurality of single cells, the equalization switch array 1 is connected to the plurality of single cells in one-to-one correspondence, the micro control unit samples the plurality of single cells, and calculates the average voltage, And calcu...

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Abstract

The invention discloses a bidirectional equalization circuit. The bidirectional equalization circuit is characterized in that an equalization switch array is correspondingly connected with a plurality of battery cells one to one; a micro-control unit samples the plurality of battery cells, obtains the average voltage through calculation, calculates the absolute value of the difference between the maximum voltage and the average voltage, and the absolute value of the difference between the minimum voltage of the plurality of battery cells and the average voltage so as to obtain the high difference and the low difference, and compares the magnitude of the high difference with the magnitude of the low difference; if the high difference is greater than the low difference, the micro-control unit drives a passive equalization circuit to start and controls a switch corresponding to the maximum voltage, in the equalization switch array to start, and then the passive equalization circuit communicates with the battery cell corresponding to the maximum voltage; and when the high difference is lower than the low difference, the micro-control unit drives an active equalization circuit to start and controls a switch corresponding to the minimum voltage, in the equalization switch array to start, and then the active equalization circuit communicates with the battery cell corresponding to the minimum voltage. The bidirectional equalization circuit realizes bidirectional equalization of high and low voltage of circuit cells.

Description

technical field [0001] The present invention relates to bidirectional equalization circuits. Background technique [0002] In recent years, the application of lithium battery packs in electric vehicles and energy storage has become more and more extensive. When a lithium battery pack is in use, it is often connected in series and parallel through a single battery to increase the battery voltage and capacity to meet the actual use requirements. Due to the slight difference in the manufacture of lithium battery cells, the inconsistency of lithium battery packs in the actual use process will gradually increase. If the equalization process is not performed in time, the increasing inconsistency will lead to the shortening of the life of lithium battery packs. end. [0003] The balance device of the battery pack is to dynamically adjust the consistency difference of the battery cells through an external circuit, improve the consistency of the battery pack, and make the battery p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0019
Inventor 刘新天何耀吉祥曾国建郑昕昕
Owner ANHUI RNTEC TECH CO LTD
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