A remaining power display device suitable for lithium iron phosphate batteries

Abstract

The invention relates to a residual electric quantity display device suitable for a lithium iron phosphate battery. The residual electric quantity display device comprises a device box body, wherein a box cover is arranged on the device box body. A circuit insertion substrate is arranged in the device box body; a connection joint, a voltage reference component, a differential amplification component, a comparator component and an indicating component are distributed on the circuit insertion substrate. Furthermore, the input end of the voltage reference component is connected with the connection joint; the main output end of the voltage reference component is connected with the input end of the differential amplification component; the output end of the differential amplification component is connected with the input end of the comparator component; and the output end of the comparator is connected with the indicating component. Therefore, the slope of a discharging platform of a battery with a lithium iron phosphate type can be amplified; and residual electric quantity can be easily and conveniently displayed. Moreover, the residual electric quantity display device is simple in structure, low in manufacturing cost and reliable in performance.

Description

technical field [0001] The invention relates to a display device, in particular to a remaining power display device suitable for a lithium iron phosphate battery. Background technique [0002] Lithium iron phosphate as a battery material has only appeared in recent years. It was July 2005 that a large-capacity lithium iron phosphate battery was developed in China. Its safety performance and cycle life are unmatched by other materials, and these are the most important technical indicators of power batteries. 1C charge and discharge cycle life up to 2000 times. The overcharge voltage of a single battery is 30V, it does not burn, and it does not explode when punctured. Lithium iron phosphate cathode materials make large-capacity lithium-ion batteries easier to use in series. With the advantages of non-toxic, non-polluting, good safety performance, wide source of raw materials, cheap price, long life, etc., it is an ideal cathode material for a new generation of lithium-ion b...

AI Technical Summary

Problems solved by technology

Voltmeters or voltage indicators, which are widely used in lead-acid batteries and other positive electrode lithium batteries, are difficult to apply because the discharge platform of lithium iron phosphate is too flat. Fuel gauges, which are widely used in mobile phones and notebook computers, rely on a large number of software and hardware environment, it is also difficult to easily transplant

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