Which methods can prevent lithium batteries from fire?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Preventing the Lithium Battery The Nanshern Engineer of the University of California has developed a safety characteristic, which prevents lithium metal battery from being rapidly warmed and fired when the lithium metal battery is short-circuited. The team has cleared the portion of the lithium battery is called the diaphragm, and the diaphragm is a barrier between the positive electrode and the negative electrode of the lithium battery, so that when the lithium battery is short-circuited, the energy accumulated inside the battery (that is, heat) The flow will slow down. After repeated charging, the lithium metal battery is repeatedly charged.

Over time, the dendritic growth is long enough, penetrating the diaphragm, raising a bridge between the anode and the cathode, causing internal short circuits. When this happens, the electron flow between the two electrodes is lost, resulting in a lithium battery immediately overheating and stopping working. 1.

Add a flame retardant in the existing electrolyte. However, in order to complete the flame retardation, a large amount of flame retardant is added to the electrolyte, which will reduce the ion conductivity of the electrolyte, significantly affect the electrochemical properties and energy density of the lithium battery. 2.

Protection by adding a dedicated protection circuit, such as: to prevent lithium battery overcharge, install a PTC polymer switch or explosion-proof safety valve in a battery's safety cap. 3, the thermal stability of the lithium battery is related to the type of the positive material, the electrolyte. By optimizing synthesis conditions, improved synthetic methods, synthetic thermal stability.

4, weak oxidation of the surface of the carbon material, such as: reduction, doping, surface modification, etc., or using spherical, fibrous carbon negative electrode material to improve the thermal stability of lithium battery. .

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