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Flame-proof battery

A technology for batteries and flame retardants, applied in secondary batteries, battery pack components, circuits, etc., can solve the problems of reducing the overall performance of the battery, reducing the battery life, reducing the ionic conductivity of the electrolyte in the battery, etc. The effect of explosion, simplicity of implementation, and guaranteed safety

Active Publication Date: 2009-02-18
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For now, no matter what kind of flame retardant is added to the electrolyte, side reactions will occur during the long-term contact between the electrolyte and the flame retardant, thereby reducing the ionic conductivity of the electrolyte in the battery and shortening the battery life. reduced, reducing the overall performance of the battery

Method used

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  • Flame-proof battery

Examples

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Embodiment 1

[0019] The material of the airtight container 11 is an insulating material. If the material is crystalline, its melting point is 50°C to 150°C; if it is amorphous, its melting temperature is 50°C to 150°C. Before the explosion, the airtight container 11 melts and the flame retardant in it flows into the electrolyte, thereby preventing the chemical reaction of the electrolyte and preventing the cell from exploding. The electrolyte properties of different batteries are different, and the critical temperature of the chemical reaction of the electrolyte is also different. The material melting point or melting temperature of the above-mentioned airtight container 11 is a range value proposed in consideration of the characteristics of different electrolytes of the current battery. Personnel should understand that, according to the characteristics of the electrolyte in the specific battery, the melting point or melting temperature of the material of the airtight container 11 is also d...

Embodiment 2

[0025] The maximum pressure of the overall structure of the airtight container 11 is designed to be 0.2Mpa to 200Mpa, that is, before the pressure in the battery cell 10 rises to explode, the airtight container 11 will burst and the flame retardant inside will flow into the electrolyte, thereby preventing The chemical reaction of the electrolyte prevents the cell from exploding. The maximum pressure value of different batteries 10 is different. Taking lithium-ion batteries for ordinary mobile phones as an example, the pressure value of batteries is generally between 75Mpa and 150Mpa. Considering the performance of the flame retardant and the controllability of the electrolyte reaction Generally, when the pressure in the cell 10 reaches 2Mpa-25Mpa, it is necessary to control the reacting electrolyte, otherwise it will react violently and is difficult to control. Those skilled in the art should understand that for different electrolytes and flame retardants, the set critical pre...

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Abstract

This invention discloses a flame resisting battery, referring to battery flame resisting technique, aiming at solving problem that existing battery has weak flame resisting performance; wherein the flame resisting battery comprises: an electrical core filled with electrolyte and provided with sealed container for arranging flame retardant therein. This invention is easily achieved, and able to ensure safety of battery without influencing battery performance. Furthermore, the sealed container can be immediately opened when safety accident occurs to the battery, then the flame retardant flows into the electrical core so as to ensure safety of battery.

Description

technical field [0001] The invention relates to battery flame-retardant technology, in particular to a flame-retardant battery using a flame retardant. Background technique [0002] Batteries are used in a wide range of applications, such as flashlights, radios, automobiles, electronic watches, CD players, mobile phones, MP3, cameras, video cameras, etc. all need to use batteries. Batteries have become an indispensable and convenient energy source for human society. [0003] At present, with the increasing awareness of environmental protection, batteries that are harmful to the environment such as lead, nickel, and cadmium are increasingly being restricted, and lithium-ion batteries that are more environmentally friendly and have a larger capacity have become the most widely used batteries. Since lithium is a chemically very active element, it is easy to catch fire and explode when it is damaged by external force, and the electrolyte of lithium-ion batteries is also unstabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/00H01M10/40H01M10/42H01M50/383
CPCY02E60/122Y02E60/10
Inventor 刘建永于海峰金峰侯紫峰
Owner LENOVO (BEIJING) LTD
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