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Composite electrolytic solution of lithium ion power battery and preparation method thereof

A composite electrolyte and power battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of power battery standard requirements and difficult to achieve battery electrical performance, achieve scientific structural design, improve thermal decomposition temperature and Effects of improved flame retardancy, stability and safety performance

Active Publication Date: 2010-06-09
醒狮科技投资有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, some units at home and abroad still use commercialized ordinary lithium-ion battery cathode materials and electrolytes in the process of R&D and manufacturing lithium-ion power batteries, and the electrical performance of the batteries is difficult to meet the standard requirements of power batteries.

Method used

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  • Composite electrolytic solution of lithium ion power battery and preparation method thereof
  • Composite electrolytic solution of lithium ion power battery and preparation method thereof

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Embodiment Construction

[0019] Below in conjunction with embodiment and accompanying drawing description, the present invention is described in further detail:

[0020] Implementation one:

[0021] The preparation method of the composite electrolyte: (1) After the organic solvent is pretreated, rectified (or dehydrated, alcohol), homogenized, and tested to pass the test, the weight ratio DMC: 23%-45%; EMC: 22%-35%; PC: 5%-15%; EC: 31%-41%; PS: 0.3%-3% injected into the mixer; (2) start the cooling system of the agitator and the mixer while injecting the organic solvent (3) After the refined lithium salt is tested and qualified, the LiPF 6 : 11%-15%; LiBOB: 1.5%-8% added to the mixer; (4) After the additives are pretreated and tested to pass the test, the weight ratio VC: 1%-2%; CHB+BP: 3 %-5%; MFE: 0.1%-0.5%; (CH 3 )SiNHSi(CH 3 ): 3 0.001%-0.00 3 5% is added to the mixer; (5) The stainless steel container for filling the product is cleaned according to different process requirements to meet the...

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Abstract

The invention discloses a compound electrolyte of the lithium ion dynamic cell and the preparation method thereof, particularly a compound electrolyte prescription of the lithium ion dynamic cell withlarge power and long service life used for high power charging and discharging and the preparation method thereof. The compound electrolyte of the lithium ion dynamic cell is composed of the following components according to the mass fraction ratio. The preparation method can be realized by the following steps, pretreating, rectifying (or dehydrating, dealcholizing) the organic solvent, adding into the electrolyte preparation mixer according to the compounding ratio and the scheduled sequence of the technology after detecting to be qualified; then adding the refined lithium salt into the mixed according to the compounding ratio after detecting to be qualified; finally adding the additive into the mixed according to the compounding ratio and the scheduled sequence after the pretreating andthe detecting to be qualified. The materials are dissolved, mixed, reacted completely in the mixer to prepare the compound electrolyte, finally after detection, the accepted product is filled to weigh into the warehouse. The invention is a novel compound electrolyte with safe environmental protection high efficiency.

Description

technical field [0001] The invention relates to a composite electrolyte of a lithium-ion power battery and a preparation method thereof, in particular to a formula of a composite electrolyte suitable for a high-power, long-life lithium-ion power battery capable of high-rate charging and discharging and a preparation method thereof. Background technique [0002] Energy is the material basis for the survival and development of human society. For hundreds of years, the energy system based on fossil fuels such as coal, oil and natural gas has greatly promoted the prosperity, progress and development of human society. However, with the continuous development of global science, technology and economy, as well as the further improvement of human culture and living standards, numerous data show that the global human beings are facing two serious dilemmas on the way forward: one is that non-renewable fossil energy will gradually The second is the massive exploitation and use of fossi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/40H01M10/36H01M10/0525H01M10/0567H01M10/0568
CPCY02E60/122Y02E60/10
Inventor 雷如清钟馨稼黄俐俐刘雪田
Owner 醒狮科技投资有限公司
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