Lithium titanate battery with high safety performance
A lithium titanate battery, safety performance technology, applied in the direction of secondary batteries, battery components, secondary battery gas removal, etc., can solve the problem of affecting battery cycle performance and rate performance, it is difficult to achieve complete coating, diaphragm Insufficient mechanical strength and other problems, to achieve the effect of not being flatulent, improving safety performance, and improving safety performance
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[0028] Example 1
[0029] A lithium titanate battery with a capacity of 20Ah includes a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte and an aluminum plastic film outer packaging.
[0030] The active material on the positive electrode sheet is a ternary material, the active material on the negative electrode sheet is lithium titanate, the solvent of the electrolyte is organic carbonate, the electrolyte contains lithium salt, and the electrolyte also contains cyanide chains. The mass part of the cyanide chain carbonate in the electrolyte is 1.5 wt%, and the mass part of the gas eliminator in the electrolyte is 0.75 wt%. The membrane has a thickness of 35 microns, a porosity of 45%, and an air permeability of 35cm 3 / sec non-woven fabric, the diaphragm material is a composite material of polypropylene, halloysite particles and carboxymethyl cellulose fiber, and the content of the components is as follows:
[0031] Polypropylene 80wt%,
[0032] Carbox...
Example Embodiment
[0041] Example 2
[0042] A lithium titanate battery with a capacity of 20Ah includes a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte and an aluminum plastic film outer packaging.
[0043] The active material on the positive electrode sheet is a ternary material, the active material on the negative electrode sheet is lithium titanate, the solvent of the electrolyte is organic carbonate, the electrolyte contains lithium salt, and the electrolyte also contains a cyanide ring The mass part of the cyanide cyclic carbonate in the electrolyte is 2wt%, and the mass part of the gas eliminator in the electrolyte is 1wt%. The diaphragm has a thickness of 50 microns, a porosity of 30%, and an air permeability of 20 cm 3 / sec microporous film, the diaphragm material is a composite material of polyethylene, halloysite particles, and carboxymethyl cellulose fiber, and the composition content is as follows:
[0044] 85wt% polyethylene,
[0045] Carboxymethyl cell...
Example Embodiment
[0054] Example 3
[0055] A lithium titanate battery with a capacity of 20Ah includes a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte and an aluminum plastic film outer packaging.
[0056] The active material on the positive electrode sheet is a ternary material, the active material on the negative electrode sheet is lithium titanate, the solvent of the electrolyte is organic carbonate, the electrolyte contains lithium salt, and the electrolyte also contains a cyanide ring. The mass part of the cyanide cyclic carbonate in the electrolyte is 1 wt%, and the mass part of the gas eliminator in the electrolyte is 0.5 wt%. The membrane has a thickness of 20 microns, a porosity of 55%, and an air permeability of 50cm 3 / sec non-woven fabric, the diaphragm material is a composite material of polypropylene, halloysite particles, and carboxymethyl cellulose fibers. The content of the components is as follows:
[0057] Polypropylene 75wt%,
[0058] Carboxymet...
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