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A balanced charging and discharging device for a lithium battery management system

A technology for balancing charging and discharging, charging and discharging devices, applied in the direction of battery circuit devices, circuit devices, collectors, etc., to achieve the effect of a relatively small number

Active Publication Date: 2015-10-28
北京九高科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the above deficiencies in the prior art, the present invention provides a balanced charge and discharge device for a lithium battery management system to solve the problem of balanced charge and discharge of lithium battery cells

Method used

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  • A balanced charging and discharging device for a lithium battery management system
  • A balanced charging and discharging device for a lithium battery management system
  • A balanced charging and discharging device for a lithium battery management system

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing, the present invention is described in detail, figure 1 To illustrate the balance charge and discharge device of the lithium battery management system by taking three lithium battery cells as an example. The charging and discharging device is a topological network composed of the first to third lithium battery cells, the first to third inductors and the first to third switch tubes. The first to third lithium battery cells are connected in series through a diode Dr and an inductor Lr. Each lithium battery cell is respectively connected in series with an inductor and a switch tube. For example, a lithium battery cell 3 is connected in series with an inductor L3 and a switch tube Q3. At the same time, the input terminal of the inductor L2 connected to the cell 2 is connected to The inductor L3 is connected, and diodes D2 and D3 are connected in series between the input terminal of the inductor L2 and the inductor L3. A capac...

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Abstract

The invention relates to a balancing charging and discharging device of a lithium battery management system. The charging and discharging device is a topology network comprising lithium battery single bodies from the first to the Nth, inductors from the first to the Nth and switching tubes from the first to the Nth, wherein the lithium battery single bodies from the first to the Nth are connected in series through an rth diode and the rth inductor, the Nth lithium battery single body, the Nth inductor and the Nth switching tube are connected in series, a first input end of the (N-1)th inductor is connected with a first connecting end of the Nth inductor through the (N-1)th switching tube, and an (N-1)th diode and an Nth diode are sequentially connected between the first input end of the (N-1)th inductor and a second connecting end of the Nth inductor in series. The balancing charging and discharging device can rapidly achieve simultaneous discharging of the lithium battery single bodies and reallocation of voltage.

Description

technical field [0001] The invention relates to a balanced battery voltage topology used in a lithium battery management system, in particular to a balanced charging and discharging device for the lithium battery management system. Background technique [0002] The voltage of a lithium-ion battery cell is about 3.6V. In actual engineering applications, to meet the specific requirements of electrical equipment, multiple cells must be connected in series and parallel to form a whole battery pack to supply power to the system. [0003] As for the numerous monomers in the battery pack, especially for the monomers connected in series, it is very important to maintain a good consistency among them. In fact, even if it is a new battery, there will be slight differences between its performance and the actual usable capacity. Taking the battery pack working in the discharge state as an example, for a battery with a relatively large usable capacity, its discharge depth is relatively s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 高强张岳
Owner 北京九高科技有限公司
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