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Active and passive composite equalization battery charging circuit

A battery charging, active and passive technology, applied in the direction of charge balance circuit, battery circuit device, circuit device, etc., can solve the problem of inability to balance efficiency and structure, and achieve the effect of simple structure, easy implementation and high-efficiency charging

Active Publication Date: 2016-05-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned problems of the charging structure and efficiency of the series lithium battery pack, the present invention provides an active and passive compound balanced battery charging circuit, which can effectively solve the problem that the efficiency and structure of the charging circuit of the series lithium battery pack cannot be balanced

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  • Active and passive composite equalization battery charging circuit
  • Active and passive composite equalization battery charging circuit
  • Active and passive composite equalization battery charging circuit

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Embodiment Construction

[0015] The invention will be further described below in conjunction with the accompanying drawings.

[0016] refer to Figure 1-3 , an active-passive composite balanced battery charging circuit of the present invention includes a controller, N isolated controlled voltage sources, N battery pack modules, and N battery voltage detection and discharge circuits, wherein the battery pack includes The number of single cells 1≤M≤12.

[0017] N isolated controlled voltage sources are composed of isolated DC-DC module, transistor Q3-1, resistor R3-1 and resistor R3-2, the Vin+ and Vin- of the isolated DC-DC module and the positive and negative The two ends of the resistor R3-1 are respectively connected to the Vo- and TRM ports of the isolated DC-DC module, so as to realize the low voltage output of the power module. One end of the resistor R3-2 is connected to the Vo+ of the power module, and the other end is connected to the Vo+ of the power module. The collector of the transistor ...

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Abstract

The invention relates to an active and passive composite equalization battery charging circuit. The battery charging circuit is characterized by comprising a controller, N isolation type controlled voltage sources, N battery pack modules and N battery voltage detection and discharge circuits; the input power supply of a system passes through an active equalization circuit to supply charging voltage to a series-wound lithium battery pack; a passive equalization circuit collects voltage of single batteries of the series-wound lithium battery pack, and transmits signals to a controller; and the controller controls and adjusts the charge balance of the single batteries and the charge balance among the battery packs through resolving the Soc of the current battery. The system has the characteristics of easy control and simple structure of the passive equalization charge as well as the characteristic of high efficiency of the active control equalization, so that equalization for charge-discharge charges of multiple battery packs can be well realized.

Description

technical field [0001] This patent belongs to the field of battery charge and discharge management, and relates to an active and passive compound balanced battery charging circuit, especially a circuit for charge and discharge balance and charge and discharge management of series lithium batteries. Background technique [0002] At present, the application of lithium batteries is more and more extensive, so the charging and discharging technology of lithium batteries has attracted more and more attention. Due to the difference in the production process of lithium batteries when they leave the factory, they will have different acceptance capabilities when storing charges. In order to avoid the "short board effect" in the lithium battery charging process in series, the equalization technology of the lithium battery charging process is very important. At present, there are two types of equalization technologies: one is passive equalization, which is energy-consuming equalizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0014
Inventor 朱纪洪和阳晋山立
Owner TSINGHUA UNIV