What role does Polymer Microporous play in battery safety valves?

Polymer Microporous materials play a vital role in battery safety valves, mainly in terms of gas pressure relief, liquid leakage prevention, fire resistance, chemical stability, controllability and lightweight. When a battery is overcharged, short-circuited, or thermally runaway, a large amount of gas may be produced inside. If these gases cannot be released in time, the internal pressure of the battery will rise sharply, which may eventually cause the battery to explode. The microporous structure of Polymer Microporous materials allows gas to pass through when the pressure reaches a certain threshold, thereby achieving effective pressure relief and avoiding dangerous situations.

Although it allows gas to pass through, due to its pore size and material characteristics, Polymer Microporous materials can effectively prevent the leakage of liquid electrolyte, ensuring that the internal electrolyte of the battery does not leak, maintaining the normal operation and safety of the battery. In addition, some Polymer Microporous materials have flame retardant properties, which can provide additional safety protection when the battery experiences thermal runaway, increasing the overall safety of the battery. These materials can maintain structural stability in high-temperature environments and will not burn.

Polymer Microporous materials also have good chemical stability and can withstand the chemical environment inside the battery, including corrosion of the electrolyte, and have stable performance during long-term use. By adjusting the pore size and surface properties of the Polymer Microporous material, the pressure release threshold and speed of the gas can be precisely controlled. This adjustability allows the material to be optimized according to the needs of different types of batteries to provide the best safety performance.

In addition, Polymer Microporous materials are relatively lightweight and will not significantly increase the weight of the battery, making them suitable for applications that require lightweighting such as electric vehicles and portable electronic devices. Through the above functions, Polymer Microporous materials are used in battery safety valves to ensure that the battery can safely release pressure under extreme circumstances, prevent liquid leakage and fire, extend the service life of the battery and improve its safety, becoming indispensable in battery safety design a part of.