Explosion-proof forklift lithium battery and preparation method thereof

A lithium battery and forklift technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of battery cycle performance that need to be improved, and achieve the effects of improving cycle capacity retention rate, small expansion thickness, and improving cycle stability

Pending Publication Date: 2021-06-22
河南省特种设备安全检测研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For lithium batteries prepared by the above two methods, the cycle performance of the battery n...

Method used

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  • Explosion-proof forklift lithium battery and preparation method thereof

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Embodiment 1

[0044] An explosion-proof lithium battery for forklifts, comprising an explosion-proof casing, a positive electrode arranged in the explosion-proof casing, a negative electrode, an electrolyte and a diaphragm; the positive electrode includes a positive electrode material and a positive current collector, and the negative electrode includes a negative electrode material and a negative current collector, The positive electrode material includes a positive electrode active material, a positive electrode conductive agent, and a positive electrode binder; the negative electrode material includes a negative electrode active material, a negative electrode conductive agent, and a negative electrode binder;

[0045] The positive electrode active material is modified lithium manganate, the positive electrode conductive agent and the negative electrode conductive agent have different components, the positive electrode binder and the negative electrode binder have different components, and ...

Embodiment 2

[0067] This embodiment provides an explosion-proof forklift lithium battery and its preparation method, which is the same as in Embodiment 1, but the difference from Embodiment 1 is that in this embodiment, in the positive electrode material, CNT: PVDF solution: modified lithium manganate :: The weight ratio of solvent NMP is: 1:3.5:13:115.

[0068] The negative electrode conductive agent is a composite conductive agent of SP-P, KS-6, and CNT, and the weight ratio of SP-P:KS-6:CNT is: 1:0.8:1.5.

[0069] The weight ratio of graphene: composite conductive agent: LA132: solvent NMP is: 11: 1.8: 1: 108.

[0070] The electrolyte contains TCP, LiPF 6 , organic solvent, described organic solvent is mixed by EC, EMC, DEC, and the weight ratio of EC:EMC:DEC is 3:3:4, LiPF 6 The concentration of is 1mol / L, and the mass fraction of TCP is 2%.

[0071] The modified lithium manganate is prepared from the following components in parts by weight: 11 parts of lithium manganate, 6 parts of...

Embodiment 3

[0073] This embodiment provides an explosion-proof forklift lithium battery and its preparation method, which is the same as in Embodiment 1, but the difference from Embodiment 1 is that in this embodiment, in the positive electrode material, CNT: PVDF solution: modified lithium manganate : The weight ratio of the solvent NMP is: 1:4:15:120.

[0074] The negative electrode conductive agent is a composite conductive agent of SP-P, KS-6, and CNT, and the weight ratio of SP-P: KS-6: CNT is: 1: 1: 2.

[0075] The weight ratio of graphene: composite conductive agent: LA132: solvent NMP is: 12:2:1:110.

[0076] The electrolyte contains TCP, LiPF 6 , organic solvent, described organic solvent is mixed by EC, EMC, DEC, and the weight ratio of EC:EMC:DEC is 3:3:4, LiPF 6 The concentration of is 1mol / L, and the mass fraction of TCP is 3%.

[0077] The modified lithium manganate is prepared from the following components in parts by weight: 12 parts of lithium manganate, 8 parts of tet...

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Abstract

The invention discloses an explosion-proof forklift lithium battery and a preparation method thereof, and belongs to the technical field of lithium batteries. The explosion-proof forklift lithium battery comprises an explosion-proof shell, and a positive electrode, a negative electrode, an electrolyte and a diaphragm which are arranged in the explosion-proof shell. The positive electrode comprises a positive electrode material and a positive current collector, the negative electrode comprises a negative electrode material and a negative current collector, and the positive electrode material comprises a positive electrode active material, a positive electrode conductive agent and a positive electrode binder; the negative electrode material comprises a negative electrode active material, a negative electrode conductive agent and a negative electrode adhesive; the positive electrode active material is modified lithium manganate, the positive electrode conductive agent and the negative electrode conductive agent are different in component, the positive electrode binder and the negative electrode binder are different in component, and the negative electrode active material is graphene. According to the present invention, the positive and negative active materials, the conductive agents, the binders, the electrolyte and the like of the lithium battery are optimized, so that the cycle capacity retention ratio of the battery is remarkably improved, and the service life of the lithium battery is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an explosion-proof forklift lithium battery and a preparation method thereof. Background technique [0002] The power supply unit of the explosion-proof forklift consists of three parts: the battery pack, the box body and the plug-in device. As a new type of energy, lithium batteries are widely used to provide energy sources for equipment. In the lithium-ion battery material system, the battery system with lithium manganate as the positive electrode and graphite as the negative electrode has become one of the most promising power battery material systems due to its low cost, high thermal safety, and environmental friendliness. . As a power source for explosion-proof forklifts, lithium batteries require a long life. However, the capacity attenuation of lithium manganese oxide batteries, especially at high temperatures, has become one of the important factors restrictin...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/583H01M10/0567H01M10/655
CPCH01M4/625H01M4/623H01M4/583H01M10/0567H01M10/655Y02E60/10
Inventor 蔡宛涛喻瑞波李东雨张伟秦鹤宇李玉顺梁洪刘建书陈俊李松韦冯新月鲁江涛周会如张秋强刘源杨基普刘俊伟王群张东马国良杨卓君范毅彭旭何峥张晗苗圃仵振宇朱鹏飞王执政李棪喻央黄宁李宁赵倩楠刘地
Owner 河南省特种设备安全检测研究院
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