Preparation method of electric bicycle battery

A technology of electric bicycles and batteries, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, batteries, etc. It can solve problems such as poor riding experience, sudden power failure of electric vehicles, and instantaneous power failure of electric vehicles, so as to improve riding experience , Improve the effect of high temperature and performance

Active Publication Date: 2021-12-24
浙江超恒动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lithium manganate mixed with phosphoric acid in view of the problems that the existing lithium manganate battery has a high working voltage platform, and the battery voltage drops rapidly under a low state of charge, the electric vehicle is cut off instantly, and the riding experience is poor. Lithium iron battery, while improving the high temperature of lithium manganese oxide and battery performance, it also improves the sudden power failure of electric vehicles under low SOC and low voltage, and improves the riding experience of users

Method used

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  • Preparation method of electric bicycle battery
  • Preparation method of electric bicycle battery
  • Preparation method of electric bicycle battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In Example 1, the specific operation method for preparing the battery is as follows:

[0046] Step 1: Mix solvent, lithium iron phosphate main material, conductive agent, and binder according to a certain mass ratio to make slurry A

[0047] The solvent, the main material of lithium iron phosphate, the conductive agent, and the binder are mixed according to a certain mass ratio, and dispersed by a high-speed mixer to form a slurry A, in which lithium iron phosphate: conductive agent: binder = 92: 4: 4, The gram specific capacity of the active material is 136mAh / g.

[0048] Step 2: Mix solvent, lithium manganate main material, conductive agent, and binder according to a certain mass ratio to make slurry B

[0049] Mix the solvent, lithium manganate main material, conductive agent, and binder according to a certain mass ratio, and disperse them through a high-speed mixer to form slurry B, in which lithium manganate: conductive agent: binder = 96: 2: 2, The gram specific...

Embodiment 2

[0065] In Example 2, the specific operation method for preparing the battery is as follows:

[0066] Step 1: Mix solvent, lithium iron phosphate main material, conductive agent, and binder according to a certain mass ratio to make slurry A

[0067] The solvent, the main material of lithium iron phosphate, the conductive agent, and the binder are mixed according to a certain mass ratio, and dispersed by a high-speed mixer to form a slurry A, in which lithium iron phosphate: conductive agent: binder = 92: 4: 4, The gram specific capacity of the active material is 136mAh / g.

[0068] Step 2: Mix solvent, lithium manganate main material, conductive agent, and binder according to a certain mass ratio to make slurry B

[0069] Mix the solvent, lithium manganate main material, conductive agent, and binder according to a certain mass ratio, and disperse through a high-speed mixer to form slurry B, wherein lithium manganate: conductive agent: binder = 96:2:2, The gram specific capacit...

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Abstract

The invention discloses a preparation method of an electric bicycle battery, which overcomes the problems that in the prior art, a working voltage platform of a lithium manganate battery is high, the voltage of the battery drops quickly under a low charge state, and an electric bicycle is instantly powered off, and comprises the following steps of mixing a solvent, a lithium iron phosphate main material, a conductive agent and a binder according to a certain mass ratio to form slurry A, mixing a solvent, a lithium manganate main material, a conductive agent and a binder according to a certain mass ratio to form slurry B, uniformly mixing the slurry A and the slurry B according to a certain mass ratio, coating a current collector with the mixture, and then performing drying, rolling and die cutting, winding or laminating the manufactured pole piece, and carrying out tab welding, top side sealing, baking and liquid injection to obtain a battery cell, performing high-temperature pressurization formation on the finished battery cell, and carrying out vacuumizing sealing, capacity grading and group matching on the formed battery cell. The high temperature of lithium manganate is improved, the battery performance is improved, and meanwhile, the situation that an electric vehicle is suddenly powered off under low SOC and low voltage is improved.

Description

technical field [0001] The invention relates to the technical field of lithium battery manufacturing, in particular to a method for preparing an electric bicycle battery. Background technique [0002] Electric bicycles are currently an important means of transportation for Chinese residents to travel. The number of electric bicycles is estimated to be about 300 million, and the annual sales volume is more than 30 million. As one of the three major parts of electric bicycles, the battery has always been based on lead-acid batteries. However, with the introduction of the new national standard and people's requirements for lightweight, high battery life, and convenience, lithium batteries are used in electric bicycles. The proportion is getting higher and higher. [0003] Lithium battery cathode materials generally use lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium-rich manganese-based materials, lithium manganese oxide, lithium iron phosphate, lithium ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M4/1391H01M4/1397H01M4/36H01M4/505H01M4/58H01M10/0525
CPCH01M10/058H01M4/364H01M4/5825H01M4/505H01M4/1391H01M4/1397H01M10/0525H01M2220/20H01M2004/028Y02E60/10Y02P70/50
Inventor 苏锋常林荣张靖常富荣雷少帆张进孝
Owner 浙江超恒动力科技有限公司
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