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Multi-cell serially-connected lithium battery pack equalization and protection system

A lithium battery pack and lithium battery technology, applied in battery circuit devices, emergency protection circuit devices, collectors, etc., can solve problems such as overcurrent at the discharge end, abnormal charge and discharge protection, failure, etc., to achieve rapid protection and improve use safety Sexual, performance-enhancing effects

Active Publication Date: 2015-04-22
FUJIAN RAYNEN TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a balance and protection system for a multi-series lithium battery pack, which can better solve the problem of abnormal charging and discharging protection or failure caused by overcurrent or even short circuit at the discharge end

Method used

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  • Multi-cell serially-connected lithium battery pack equalization and protection system
  • Multi-cell serially-connected lithium battery pack equalization and protection system
  • Multi-cell serially-connected lithium battery pack equalization and protection system

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Embodiment Construction

[0062] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0063] figure 2 It shows a schematic structural diagram of a balance and protection system for a multi-series lithium battery pack provided by the present invention, as figure 2 As shown, a multi-series lithium battery pack equalization and protection system includes a lithium battery charging and discharging component, a control module, a charging and discharging switch device, and a discharge terminal abnormality protection circuit, wherein:

[0064] The lithium battery charging and discharging assembly is used for connecting an external charging power source to the lithium battery pack for charging and supplying power to the load. Specifically, the li...

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PUM

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Abstract

The invention discloses a multi-cell serially-connected lithium battery pack equalization and protection system. The system comprises a lithium battery charge and discharge component, a control module, a charge and discharge switching device and a discharge end abnormality protection circuit, wherein the lithium battery charge and discharge component is used for connecting an external charging power supply into a lithium battery pack for charging and supplying power to a load, the control module is used for being in IIC (inter-integrated circuit) communication with the lithium battery charge and discharge component so as to control the same to be fully charged, the charge and discharge switching device is used for switching on or switching off a charge hoop or a power supply loop of the lithium battery charge and discharge component, and the discharge end abnormality protection circuit is used for detecting discharge overcurrent of a discharge end and sending a discharge end abnormality signal when detecting the discharge overcurrent of the discharge end. Besides, the control module sends an overcorrent protection signal to the charge and discharge switching device according to the discharge end abnormality signal so as to switch off the charge hoop or the power supply loop of the lithium battery charge and discharge component.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to a balance and protection system for a multi-series lithium battery pack. Background technique [0002] In recent years, because lithium batteries have many advantages such as stable discharge voltage, low self-discharge rate, long life, no memory effect, small size, and no pollution, they are widely used in testing instruments, digital products, power tools, etc. figure 1 It shows a structural block diagram of a multi-series lithium battery pack system provided by the prior art, including lithium battery charging and discharging components, a control module and a charging and discharging switch device. The control module controls the charging and discharging switch device to connect or disconnect the charging loop or the power supply loop according to the charging or discharging status of the multi-series lithium battery pack system. At present, the following problems still exist i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02H7/18
Inventor 杨维坚王开伟
Owner FUJIAN RAYNEN TECH
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