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Safety valve and pressure release device of EPS battery unit
Battery cells, especially EPS (encapsulated power system) batteries, produce gas and increase internal pressure during charging and discharging, so it is essential to have an effective safety valve and pressure relief device. These devices can automatically release excess gas when the pressure is too high, ensuring the safety and stability of the battery.
main content
Stainless steel is commonly used in the manufacture of safety valves and pressure relief devices because it has good corrosion resistance and strength. The stainless steel safety valve can break when the internal pressure of the battery rises to a certain extent, releasing the pressure and preventing the battery from exploding. For example, some battery manufacturers use laser welding firmly two aluminum metal sheets, when the internal pressure rises to a certain value, the aluminum sheet breaks from the designed groove position.
Aluminum alloys are used in battery safety valves and pressure relief devices because of their light weight and good workability. The position of the safety valve is generally located in the center of the battery cover plate, and the battery cover plate and the explosion plate can be connected by two methods of integrated processing or split processing. In split processing, the explosion-proof sheet is usually formed by stamping 1050 aluminum alloy sheet, and then laser welding is connected to the cover plate.
Polypropylene (PP) is used in safety valves and pressure relief devices for batteries because of its light weight, chemical resistance and economy. PP materials can be used to make explosion-proof discs, which are parts that break to release pressure when the internal pressure exceeds a certain value.
Fluoroplastics, such as polytetrafluoroethylene (PTFE), are used as seals in safety valves and pressure relief devices because of their excellent chemical resistance and low coefficient of friction. These materials maintain performance in extreme temperature and chemical environments and are suitable for battery applications that require high corrosion resistance.
Superalloy springs are used in safety valves and pressure relief devices to ensure that the valve responds correctly when the pressure inside the battery changes. These springs maintain their performance in high temperature environments, ensuring that the safety valve can be opened and closed in time when needed.
CONCLUSION
In summary, the safety valve and pressure release device of the EPS battery cell are manufactured with a variety of materials to ensure that the pressure can be effectively released when the internal pressure of the battery is too high, protecting the battery and user safety. Each material has its own unique properties and application scenarios, and manufacturers will choose the appropriate material according to the specific requirements of the battery and the application environment.
EPS BATTERY SERIES
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Extended reading
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