Method for producing non-aqueous electrolyte secondary battery

一种非水电解质、制造方法的技术，应用在非水电解质蓄电池、二次电池、锂蓄电池等方向，能够解决火灾、电解液着火等问题，达到提高安全性、提高密封性、抑制闪点的降低的效果

Active Publication Date: 2015-08-26
ELIIY POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the presence of a fire source, when the electrolyte leaks due to some accident, etc., there is a risk that the leaked electrolyte catches fire and causes a fire

Method used

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  • Method for producing non-aqueous electrolyte secondary battery
  • Method for producing non-aqueous electrolyte secondary battery
  • Method for producing non-aqueous electrolyte secondary battery

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Embodiment Construction

[0034] The manufacturing method of the non-aqueous electrolyte secondary battery according to the present invention is characterized in that the method includes the following steps: the step of putting the electrode body into the outer casing, the electrode body has a positive electrode containing a positive electrode active material and a negative electrode active material. The negative electrode of the material is a folded separator structure or a winding structure in which a separator is laminated between the positive electrode and the negative electrode; the step of putting a non-aqueous electrolyte that does not contain a flame retardant into the outer casing; by a step of applying a voltage between the positive electrode and the negative electrode placed in the outer case to charge the electrode body; a step of putting a flame retardant in the outer case; and a step of sealing the outer case , wherein the step of charging is a step of charging the electrode body in a stat...

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Abstract

This method for producing a non-aqueous electrolyte secondary battery comprises: a step for introducing, into an outer casing, an electrode body that has a folded structure or a wound structure and in which a positive electrode including a positive-electrode active material and a negative electrode including a negative-electrode active material are stacked with a separator sandwiched therebetween; a step for introducing, into said outer casing, a non-aqueous electrolyte that does not include a flame retardant; a step for performing charging by applying a voltage between said positive electrode and said negative electrode that have been introduced into said outer casing; a step for introducing a flame retardant into said outer casing; and a step for sealing said outer casing. Said method is characterized in that said charging step is a step for performing charging in a state where the surface of said positive-electrode active material and the surface of said negative-electrode active material are in contact with said non-aqueous electrolyte that substantially does not include a flame retardant.

Description

technical field [0001] The invention relates to a method for manufacturing a nonaqueous electrolyte secondary battery. Background technique [0002] Lithium ion secondary batteries attract attention because of their high energy density, and are actively researched and developed. [0003] Traditional lithium-ion secondary batteries are usually used by using such as LiPF 6 Li salts are dissolved in mixed solvents of cyclic carbonates such as ethylene carbonate (EC) or propylene carbonate (PC) and chain carbonates such as diethyl carbonate (DEC) or dimethyl carbonate (DMC) And the prepared solution was used as electrolyte. Non-aqueous electrolytic solutions prepared by using these carbonates have a low flash point of about 30°C. Therefore, in the presence of an ignition source, when the electrolytic solution leaks due to some accident or the like, there is a risk that the leaked electrolytic solution catches fire and causes a fire. In view of this, various techniques for ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0583H01M10/0567H01M10/0587H01M50/627
CPCH01M10/0567H01M4/0447H01M2/36H01M10/0587H01M10/0583H01M10/052H01M50/627Y10T29/49112Y02E60/10Y02P70/50H01M10/446
Inventor 福永孝夫原富太郎葛岛勇介
Owner ELIIY POWER
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