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Layered battery pack balancing circuit

A technology for balancing circuits and battery packs, applied in battery circuit devices, circuit devices, collectors, etc., can solve problems such as insufficient development of battery balancing circuits, restrictions on the development of electric vehicles, immaturity, etc., to get rid of short boards effect, increase usable capacity, and optimize performance

Inactive Publication Date: 2015-12-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with power batteries, the technology of battery equalization circuits has obviously not been sufficiently developed, and the immaturity of the technology itself has greatly restricted the development of domestic electric vehicles.

Method used

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  • Layered battery pack balancing circuit
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Examples

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in detail (the present invention only relates to equalization circuit part, and control circuit is that those skilled in the art can refer to the circuit parameter value programming realization and setting of existing specific application. In order to meet this field The customary expression habits, under the premise of ensuring clarity, the following individual components are directly represented by symbols to achieve a concise and clear expression effect. energy storage inductor).

[0023] figure 1 It is a structure diagram of a layered equalization circuit. The circuit includes a battery pack, a bottom battery module control circuit, a battery pack main control circuit, and a balancing subunit; the battery pack includes a plurality of bottom battery modules connected in series, and each bottom battery module is connected to a bottom battery module control circui...

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Abstract

The invention discloses a layered battery pack balancing circuit, which comprises bottom battery module control circuits, a master control circuit of a battery pack and balancing sub-units, wherein the bottom battery module control circuits respectively control corresponding bottom battery modules, so that single batteries in the bottom battery modules achieve dynamic balance in the charging and discharging processes; and the master control circuit of the battery pack achieves electric quantity balance among various bottom battery modules in the series battery pack by outputting corresponding control signals to the balancing sub-units through the balancing sub-units. According to the layered battery pack balancing circuit, through mutual division and cooperation of the bottom battery module control circuits and the master control circuit of the battery pack, dynamic balance of the electric quantity of various single batteries in the charging and discharging process of the battery pack can be achieved; the short-board effect of the battery pack is cast off; the capacity efficiency of the battery pack is improved; the cycle life and the service life of the battery pack are prolonged; and the operation cost and the maintenance cost of a system are reduced. Therefore, the layered battery pack balancing circuit can be applicable to hybrid / pure electric vehicles, miniature electric cars or energy storage devices.

Description

technical field [0001] The invention relates to a layered battery group equalization circuit, which is suitable for hybrid / pure electric vehicles, miniature electric vehicles or energy storage devices. Background technique [0002] The core of an electric vehicle or an energy storage device is a battery, and secondary batteries have many disadvantages, such as the lifespan will be greatly shortened if used improperly, the stored energy cannot be too large, the problem of series and parallel use, and safety in use, etc. The emergence of the battery equalization circuit is mainly to improve the utilization rate of the battery, prevent the battery from overcharging and over-discharging, prolong the service life of the battery, and monitor the state of the battery. So the core of the battery lies in the battery balancing circuit. A battery equalization circuit with superior performance can ensure that the battery pack is always safe and reliable to operate, give full play to th...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 康龙云郭向伟李文彪姚远陈凌宇
Owner SOUTH CHINA UNIV OF TECH
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