Safe absorbing device for lithium-ion battery

Abstract

The invention discloses a safe absorbing device for a lithium-ion battery. The safe absorbing device for the lithium-ion battery relates to a lithium battery passive safety concept and is used for solving the problems of fire disasters and other danger due to the fact that the interior of the lithium-ion battery is subjected to high temperature and high pressure. The lithium-ion battery comprises a battery body, wherein the battery body is rectangular or cylindrical, and an electrolyte is contained in the battery body; the battery body is provided with a safety valve; the safe absorbing device is mounted on the battery body; and the safety valve is communicated with safe absorbing device. According to the safe absorbing device for the lithium-ion battery, after the safety valve is opened, high temperature liquid and gas in the battery body can be effectively absorbed, so that the fire disasters and other danger caused by the high temperature liquid and gas are avoided, the problem of potential safety hazards in the wide application of the lithium-ion battery is solved, and thus, the safe absorbing device for the lithium-ion battery has broad market prospects.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a lithium-ion battery safe absorption device. Background technique [0002] Li-ion batteries with excellent performance, long cycle life and high energy density have been widely used in mobile communications and digital products; the main internal structure of the battery includes positive electrode sheets, negative electrode sheets and diaphragms. , Negative electrode sheet; At present, the battery may be overcharged or over-current during charging or discharging, which may cause the temperature of the battery to rise and the pressure to increase, resulting in an explosion; the electrolyte in the battery is a flammable liquid, and when the temperature is greater than its ignition point Therefore, if the battery is in use or the internal short circuit caused by the internal defect of the battery causes the high-temperature electrolyte to flow out or spray out, it will burn; it is easy to...

AI Technical Summary

Problems solved by technology

[0002] Li-ion batteries with excellent performance, long cycle life and high energy density have been widely used in mobile communications and digital products; the main internal structure of the battery includes positive electrode sheets, negative electrode sheets and diaphragms. , Negative electrode sheet; At present, the battery may be overcharged or over-current during charging or discharging, which may cause the temperature of the battery to rise and the pressure to increase, resulting in an explosion; the electrolyte in the battery is a flammable liquid, and when the temperature is greater than its ignition point It will cause combustion; therefore, if the battery is in use or the internal short circuit caused by the internal defect of the battery causes the flow or ejection of high-temperature electrolyte, it will burn; it is easy to cause a safety accident

[0003] At present, in order to prevent the electrolyte in the battery from exploding at high temperature during charging or discharging, a safety valve is installed on the battery. When the pressure in the battery reaches a certain level, the safety valve will automatically open. release, so as to avoid explosion; this method is feasible for small batteries, such as mobile phone batteries, but for large batteries, such as car batteries, when the safety valve is opened, a large amount of high-temperature electrolyte is ejected from the body, and the electrolytic The liquid is flammable, so it is easy to cause a fire

Images