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Energy balance circuit for battery pack connected in series

A balanced circuit and energy balanced technology, applied in battery circuit devices, circuit devices, collectors, etc., can solve the problems of different battery characteristics, overcharge and undercharge of battery packs, etc., to prolong battery life and reduce underdischarge , Ease of use

Inactive Publication Date: 2013-09-18
YANTAI XINNENG POWER SUPPLY TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide an energy equalization circuit for battery packs connected in series to solve the problem of overcharging and undercharging of battery packs connected in series caused by inconsistent battery characteristics

Method used

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  • Energy balance circuit for battery pack connected in series
  • Energy balance circuit for battery pack connected in series
  • Energy balance circuit for battery pack connected in series

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The "status display unit" in Embodiment 1 is used to display the relevant parameters of the battery system with an LCD or LED panel, and provides them to the system operator for monitoring; the "human-machine interface unit" is used for the operator to input parameters and control the system use.

[0045] Figure 4 It is Embodiment 2 of the battery balancing circuit of the present invention, which is applied to an embedded system. Because the balance circuit of each stage in the charge-discharge balance system of the series battery pack built by the battery balance circuit of the present invention is the same, and the cascading method is also very simple, so this balance method similar to internal resistance adjustment is very suitable for use with batteries. It is made into an integrated package, which is convenient for the engineering application of the battery. Such as Figure 4 In the shown embodiment 2, the battery balancing unit is designed as an independent co...

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PUM

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Abstract

The invention relates to an energy balance circuit for a battery pack connected in series. The battery pack is composed of two or more battery single bodies which are connected in series. The energy balance circuit comprises single body balance circuits whose number equals to that of the battery single bodies. Each of the single body balance circuits is connected in parallel with a corresponding battery single body respectively. Each of the single body balance circuits comprises a balance circuit unit which is used for transferring or supplementing an energy of each of the single body balance circuits, and a PWM control unit which is used for driving the balance circuit unit according to a state of charging and discharging of the corresponding battery single body. The single body balance circuits at all levels are connected in series so that a renewable energy structure shaped in an end-to-end circular ring is formed. Therefore, a battery charging and discharging process can be adjusted in real time, and a standby time of the battery pack is prolonged at greatest degree.

Description

technical field [0001] The invention relates to battery equalization technology, in particular to an energy equalization circuit for battery packs connected in series. Background technique [0002] In the field of new energy technology, batteries are widely used in series to store energy, fill peaks and valleys, and continuously supply energy. However, due to the inherent inconsistency of batteries, that is, there are differences in parameters such as voltage, internal resistance, and capacity of batteries of the same model and specification, even if strict selection and matching are carried out, it is impossible to guarantee that all batteries have the same characteristics. The electric energy stored in the batteries in series is inconsistent when charging, and the potential released when discharging is also inconsistent. This inconsistency in charge and discharge in turn accelerates the inconsistency in the electrochemical characteristics of the batteries, resulting in acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 黄金亮
Owner YANTAI XINNENG POWER SUPPLY TECH DEV CO LTD
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