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Floating-charge type fireproof lithium iron phosphate battery pack system and charging method thereof

A technology for lithium iron phosphate and battery packs, which is applied in the field of floating-charge fireproof lithium iron phosphate battery pack system and its charging, to achieve the effects of improving capacity availability, high air tightness, and solving consistency and safety problems

Inactive Publication Date: 2019-10-11
SHANGHAI AEROSPACE POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods can only reduce the consequences caused by battery failure, and cannot avoid a series of consequences caused by battery failure at the source

Method used

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  • Floating-charge type fireproof lithium iron phosphate battery pack system and charging method thereof
  • Floating-charge type fireproof lithium iron phosphate battery pack system and charging method thereof
  • Floating-charge type fireproof lithium iron phosphate battery pack system and charging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The electrolyte uses a five-component solvent, and the volume ratio of the solvent is EC (ethylene carbonate): EMC (ethyl methyl carbonate): DMC (dimethyl carbonate): DEC (diethyl carbonate): PC (propylene carbonate) The ratio is 60:5:15:15:5, and the redox shuttle additive is added at a content of 0.9%. The above-mentioned electrolyte solution, positive electrode, negative electrode and diaphragm are made into a fresh lithium iron phosphate single cell according to the battery manufacturing method.

Embodiment 2

[0055] The batteries manufactured according to Example 1 were assembled into a lithium iron phosphate battery pack module with 1 parallel and 12 strings, and a battery protection device was connected in parallel on each single battery.

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PUM

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Abstract

The invention discloses a floating-charge type fireproof lithium iron phosphate battery pack system and a charging method thereof. The floating-charge type fireproof lithium iron phosphate battery pack system comprises a battery box, a lithium iron phosphate battery pack module arranged in the battery box, and a battery management system electrically connected with the lithium iron phosphate battery pack module; the lithium iron phosphate battery pack module is formed by connecting a plurality of lithium iron phosphate cells; a redox shuttle additive is added into the electrolyte of the lithium iron phosphate cells; the redox shuttle additive can convert redundant electric energy into heat energy under continuous constant-current charging; and the lithium iron phosphate cells are connectedin parallel with a battery protection device for playing a balancing role. By using the floating-charge type fireproof lithium iron phosphate battery pack system and the charging method thereof designed by the invention, a system basically has no overcharge condition, the consistency and safety of the system are improved to the maximum extent, and the effects of overcharge prevention and fire prevention are truly achieved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a floating-charge fireproof lithium iron phosphate battery pack system and a charging method thereof. Background technique [0002] With the development of science and technology, lithium-ion batteries and their systems have become research hotspots. However, in the fields of rail transit, power engineering DC power supply systems, etc., the batteries that can be hung on the bus for a long time to operate in floating charging are still based on lead-acid batteries and Nickel-cadmium batteries are the main ones. With the development of industry and the improvement of environmental awareness, people began to look for new green power sources that are environmentally friendly, pollution-free, stable, and high in energy density. Lithium iron phosphate battery has become the focus of research due to its high energy density, long cycle life, good stability, green and poll...

Claims

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Application Information

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IPC IPC(8): H01M2/10H01M2/12H01M10/0567H01M10/42H01M10/0525H01M10/44
CPCH01M10/0525H01M10/4235H01M10/0567H01M10/4207H01M10/441H01M10/446H01M50/24H01M50/394H01M50/383Y02E60/10
Inventor 陈道周钦哲徐晓炜常胜利刘新伟
Owner SHANGHAI AEROSPACE POWER TECH
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