Lithium iron phosphate battery convenient for management of battery management system

A technology of lithium iron phosphate battery and nickel-cobalt lithium manganese oxide, which is applied in the field of battery management and lithium iron phosphate battery, can solve the problems of battery damage, shortened working life, large error, etc., and achieves convenient collection, effective charge and discharge management, and extended The effect of service life

Inactive Publication Date: 2012-09-26
JIANGXI RIPUSHENG ENERGY TECH
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Problems solved by technology

Ordinary lithium iron phosphate batteries generally use lithium iron phosphate (LiFePO 4 ) as the active material of the positive electrode of the battery, but the voltage characteristic curve during the discharge process of the lithium iron phosphate battery is relatively smooth when it is around 3.1V, which is not conducive to the BMS colle

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  • Lithium iron phosphate battery convenient for management of battery management system
  • Lithium iron phosphate battery convenient for management of battery management system

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Embodiment Construction

[0010] In order to illustrate the problem, we prepared ordinary lithium iron phosphate and the novel lithium iron phosphate battery provided by the present invention for comparison.

[0011] The mass ratio of each component of the positive electrode material of an ordinary lithium iron phosphate battery is LiFePO 4 : Conductive agent: PVDF=125:2:3, the mass ratio of each component of the negative electrode material is artificial graphite: Conductive agent: CMC:SBR=100:1.5:1.5:2.5. A lithium iron phosphate battery with a model number of 756070 was made by a conventional method, and discharged at a conventional 1C.

[0012] The mass ratio of each component of the battery positive electrode material body of the present invention is LiFePO 4 :LiNi 0.33 co 0.33 mn 0.33 o 2 : Conductive agent: PVDF=100:1:3:5, the mass ratio of each component of the negative electrode material is artificial graphite: Conductive agent: CMC:SBR=100:1.5:1.5:2.5. A lithium iron phosphate battery wi...

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Abstract

The invention discloses a novel lithium iron phosphate battery convenient for management of a battery management system (BMS). An electrical core of the lithium iron phosphate battery mainly comprises an anode material and a cathode material; a ternary material (LiNIxCoyMn1-x-yO2) is added into the anode material to change a discharge voltage characteristic curve of the lithium iron phosphate battery at 3.1 V and slope the curve, so as to facilitate the BMS to acquire voltage and estimate state of charge (SOC) of the battery, thereby effectively carrying out charge and discharge management on the battery and substantially prolonging usage life of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to battery management and lithium iron phosphate battery technology. Background technique [0002] The battery management system (BMS) is the link between the battery and the user, and the main object is the secondary battery. Secondary batteries have the following disadvantages, such as less stored energy, short life, problems in series and parallel use, safety in use, and difficulty in estimating battery power. The performance of batteries is very complex, and the characteristics of different types of batteries vary greatly. The main purpose of BMS is to improve the utilization rate of the battery, prevent the battery from overcharging and overdischarging, prolong the service life of the battery, and monitor the state of the battery. [0003] With its excellent charging and discharging performance and high energy density, lithium iron phosphate battery is widely used i...

Claims

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Application Information

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IPC IPC(8): H01M10/052H01M4/58H01M4/525H01M4/62
CPCY02E60/122Y02E60/10
Inventor 袁平秋陆明
Owner JIANGXI RIPUSHENG ENERGY TECH
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