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High temperature resistant lithium titanate battery and formation and aging method thereof

A lithium titanate battery, high-temperature-resistant technology, applied in the field of lithium-ion batteries, to achieve the effects of good wettability, increased service life, and improved charge and discharge stability

Active Publication Date: 2018-06-15
CAMEL GRP NEW ENERGY BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the current state of the art above, the purpose of the present invention is to provide a high-temperature-resistant lithium titanate battery and its formation and aging method. The present invention adopts a special material system and formation and aging process to effectively solve the problem of gas production in lithium titanate batteries. Problems, improve its high temperature storage capacity and cycle life

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  • High temperature resistant lithium titanate battery and formation and aging method thereof
  • High temperature resistant lithium titanate battery and formation and aging method thereof
  • High temperature resistant lithium titanate battery and formation and aging method thereof

Examples

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Effect test

Embodiment 1

[0034] A high-temperature-resistant lithium titanate battery with a capacity of 20Ah, including a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte, and an aluminum-plastic film outer packaging.

[0035] The active material on the positive electrode sheet is LiNi with a particle size of 6um 0.5 co 0.3 mn 0.2 o 2 Ternary material, the active material on the negative electrode sheet is lithium titanate with a particle size of 0.9um, the thickness of the wet-process PE separator is 16um, the porosity is 45%, and the air permeability is 15cm 3 / sec; the solvent of the electrolyte is dimethyl carbonate and diethyl carbonate, and the electrolyte contains LiPF 6 , the concentration is 1.2mol / L, and the electrolyte also contains carboxylate methyl propionate and boron-containing additive trimethyl borate, the mass fraction of carboxylate in the electrolyte is 33%, and the boron-containing additive is in the electrolyte The mass fraction in is 1%.

...

Embodiment 2

[0043] A high-temperature-resistant lithium titanate battery with a capacity of 20Ah, including a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte, and an aluminum-plastic film outer packaging.

[0044] The active material on the positive electrode sheet is LiNi with a particle size of 6um 0.5 co 0.3 mn 0.2 o 2 Ternary material, the active material on the negative electrode sheet is lithium titanate with a particle size of 1.2um, the thickness of the wet-process PE diaphragm is 12um, the porosity is 50%, and the air permeability is 20cm3 / sec; The solvent is propylene carbonate and diethyl carbonate, the electrolyte contains lithium salt, the concentration of LiPF6 is 1.3mol / L, and the electrolyte also contains carboxylate ethyl acetate and boron-containing additive B 2 o 3 , the mass fraction of the carboxylate in the electrolytic solution is 35%, and the mass fraction of the boron-containing additive in the electrolytic solution is 2%.

...

Embodiment 3

[0052] A high-temperature-resistant lithium titanate battery with a capacity of 20Ah, including a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte, and an aluminum-plastic film outer packaging.

[0053] The active material on the positive electrode sheet is LiNi with a mass fraction of 70% 0.33 co 0.33 mn 0.33 o 2 Ternary materials and a mass fraction of 30% lithium manganese iron phosphate, the active material on the negative electrode sheet is lithium titanate with a particle size of 2um, the thickness of the wet-process PE diaphragm is 15um, the porosity is 50%, and the air permeability is 30cm 3 / sec; the solvent of the electrolyte is propylene carbonate and dimethyl carbonate, and the electrolyte contains lithium salt, LiPF 6 Concentration is 1.8mol / L, also contains carboxylate propyl formate and boron-containing additive triethyl borate in electrolyte, the mass fraction of carboxylate in electrolyte is 38%, the boron-containing additiv...

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Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a high temperature resistant lithium titanate battery and a formation and aging method thereof. The lithium titanate battery comprises a positive plate, a negative plate, a diaphragm, an electrolyte and an outer packaging film, wherein an active substance on the positive plate is a ternary material or a mixed material of the ternary material and a lithium salt; an active substance on the negative plate is lithium titanate; the diaphragm is a PE diaphragm; the electrolyte solvent is organic carbonic ester; and LiPF6 is contained inside the electrolyte. By adopting a special material system and the formation and aging technology, the gas production problem of the lithium titanate battery is effectively solved, the high-temperature storage capacity of the lithium titanate battery is improved, and the recycling service life of the lithium titanate battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a high temperature resistant lithium titanate battery and a formation and aging method thereof. Background technique [0002] At present, the energy crisis has become the most serious problem in the 21st century, and it has become an inevitable development trend that non-renewable fossil energy will be replaced by green energy. Lithium-ion batteries have the advantages of high energy density, long cycle life, and environmental protection. They have occupied an important position in the energy storage device market and are used in a variety of portable mobile devices, such as mobile phones, cameras, and notebook computers. Gradually applied to electric bicycles (Ebike), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), pure electric vehicles (EV) and other large electric equipment. [0003] Since 2017, new energy buses are still showing a grow...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 胡金星张宝华娄勇刚黄院军程诚李新华
Owner CAMEL GRP NEW ENERGY BATTERY CO LTD
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