Safe high-discharging-rate lithium battery pack module

Abstract

The invention relates to a safe high-discharging-rate lithium battery pack module comprising a battery pack, a high-discharging-rate relay and a battery pack charging and discharging management system which are in circuit connection. The lithium battery pack comprises a plurality of individual lithium batteries in series connection, a short-circuit piece connects an anode of one individual lithium battery to a cathode of another individual lithium battery, and the whole lithium battery pack comprises an output anode and an output cathode; the high-discharging-rate relay is connected with the output anode of the lithium battery pack and the battery pack charging and discharging management system, the battery pack charging and discharging management system comprises a charging and discharging management module, a voltage protection module and a current protection module, an input end of the charging and discharging management module is connected with an outside charging power source while a first output end of the same is connected with the lithium batteries, and a second output end of the lithium battery charging and discharging management module, the voltage protection module and the current protection module are sequentially connected. The lithium battery pack module realizes serial connection of the individual batteries and is long in standby time, long in circulating life and high in stability.

Description

technical field [0001] The invention relates to a safe high discharge rate lithium battery pack module. Background technique [0002] With the advancement of technology, the application fields of lithium-ion batteries are no longer limited to mobile phones, MP3, cameras and other digital products and small electric tools, but have been extended to electric vehicles and large-scale energy storage applications. The service life of power batteries for electric vehicles is 3 years and 100,000 kilometers, and the service life of energy storage batteries is more than 10 years. [0003] But at present, lithium batteries do not have a high discharge rate, and the most common one is within 30C (1C=1 hour rate rated capacity (A.H); for example: 8AH battery 1C=8A). For example, for an 8AH battery, its maximum discharge current is 30×8=240 amperes. This is far from being able to adapt to large vehicles with large starting currents. [0004] The voltage of each single lithium battery ...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a safe high discharge rate lithium battery pack module, realizes the series connection of multiple single cells, and solves the problem in the prior art that when the incoming single lithium batteries are inconsistency, some single lithium batteries will be overcharged. Charging, over-discharging, and lead to short standby time, short cycle life, low safety and stability of lithium battery packs

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