Soft-package lithium iron phosphate battery

A soft-packed lithium iron phosphate and battery technology is applied in secondary batteries, battery pack components, non-aqueous electrolyte batteries, etc. The effect of high performance and large capacity

Inactive Publication Date: 2016-02-03
河南环宇赛尔新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because pure electric vehicles, hybrid vehicles, and electric tools have high requirements on the rate performance of batteries, the existing lithium iron phosphate batteries cannot meet the use requirements due to their low rate.

Method used

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  • Soft-package lithium iron phosphate battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of 3.2V / 65Ah battery comprises the steps:

[0032] Contains Mg 2+ Preparation of lithium iron phosphate: by Li 1-x Mg x FePO 4 The stoichiometric ratio of LiOH·H 2 O, MgO, FePO 4 , add absolute ethanol ball milling mix, and then in N 2 Prepared by roasting at 700°C for 12 hours under atmosphere, where x=0.005-0.02;

[0033] Positive electrode preparation: first dissolve the binder polyvinylidene chloride in nitrogen methyl pyrrolidone, stir for 4 hours at a speed of 50r / min, and disperse at a speed of 1500r / min, then add Mg 2+ The lithium iron phosphate and the conductive agent are continuously stirred, the dispersion speed is 1800r / min, and the time is 5 hours to make the positive electrode material. The viscosity of the positive electrode material is controlled at 5000-10000mPa.s, and then the positive electrode material is coated on the On the positive electrode current collector, the coating surface density of the positive electrode mater...

Embodiment 2

[0038] The preparation method of 3.2V / 80Ah battery comprises the steps:

[0039] Contains Mg 2+ Preparation of lithium iron phosphate: by Li 1-x Mg x FePO 4 The stoichiometric ratio of LiOH·H 2 O, MgO, FePO 4 , add absolute ethanol ball milling mix, and then in N 2 Prepared by roasting at 700°C for 12 hours under atmosphere, where x=0.005-0.02;

[0040] Positive electrode preparation: first dissolve the binder polyvinylidene chloride in nitrogen methyl pyrrolidone, stir for 4 hours at a speed of 50r / min, and disperse at a speed of 1500r / min, then add Mg 2+ Continue to stir the lithium iron phosphate and the conductive agent, the dispersion speed is 1800r / min, and the time is 5h to make the positive electrode material. The viscosity of the positive electrode material is controlled at 5000-10000mPa.s, and then the positive electrode material is coated on the positive electrode assembly On the fluid, the coating surface density of the positive electrode material is 240g / m ...

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Abstract

The invention discloses a soft-package lithium iron phosphate battery and a preparation method thereof. The soft-package lithium iron phosphate battery comprises an anode, a cathode, a membrane, electrolyte and a shell, wherein the anode comprises an anode pole lug, an anode current collector and an anode material coating on the surface of the anode current collector; the cathode comprises a cathode pole lug, a cathode current collector and a cathode material coating on the surface of the cathode current collector; the anode current collector is a sheet-plate-shaped base material; overturning edge concave pits are uniformly distributed on the two side faces of the sheet-plate-shaped base material; the cathode current collector is a sheet-plate-shaped base material; overturning edge concave pits are uniformly distributed on the two side faces of the sheet-plate-shaped base material of the cathode. With the adoption of the soft-package lithium iron phosphate battery, the condition that the multiplying power of a lithium iron phosphate battery in the prior art is low so that the use requirements cannot be met is solved and the multiplying power is greatly improved.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a lithium iron phosphate battery and a preparation method for the lithium iron phosphate battery. Background technique [0002] With the continuous reduction of traditional non-renewable energy sources and the deteriorating environmental problems, the research and development of new energy sources are becoming more and more urgent. Lithium-ion batteries have become one of the research hotspots in recent years due to their high energy density, high energy efficiency, and environmental friendliness. [0003] According to positive electrode materials, lithium ion batteries are divided into lithium cobalt oxide batteries, lithium manganese oxide batteries, ternary material batteries, lithium iron phosphate batteries, etc. Among them, lithium cobalt oxide batteries occupy a major position in the field of portable electronic products; lithium iron phosphate batteries With its stable structure, no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M2/26H01M4/72H01M10/058H01M10/0525H01M50/543H01M50/566
CPCH01M4/04H01M4/72H01M10/0525H01M10/058H01M50/531Y02E60/10Y02P70/50
Inventor 刘永华左新渠司雅昆
Owner 河南环宇赛尔新能源科技有限公司
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