SUNYGROUP Lasted Lithium-ion Battery Recycling Technology

Electric vehicle battery recycling is one of the hottest solid waste recycling projects on the market. However, the risk of thermal runaway and explosion during the crushing of charged batteries is the biggest obstacle faced by recyclers. SUNY GROUP has successfully overcome this problem with its latest nitrogen protection system, setting a new safety standard for lithium-ion battery recycling solutions.

The Science of Prevention: Why Nitrogen?

Lithium-ion batteries typically contain residual energy (state of charge). When a crusher punctures the battery casing, a short circuit can occur, igniting the flammable organic electrolyte. Traditionally, this has been addressed with deep discharge or “water washing,” but these methods are slow and produce toxic wastewater.

SUNY Group’s lithium-ion battery recycling technology uses an inert gas to protect the environment. By filling a completely sealed crushing chamber with nitrogen ($N₂$), the oxygen content is strictly controlled below 3%. Since combustion requires oxygen, even if sparks are generated during the mechanical shearing of battery cells, the risk of fire or explosion is eliminated at the source. SUNYGROUP’s upgraded lithium battery recycling production line offers several key advantages:

1. Real-time Oxygen Monitoring: High-precision sensors continuously monitor the internal gas environment, automatically adjusting nitrogen flow or triggering an emergency shutdown when oxygen levels fluctuate.

2. Sealed Crusher Design: Every bolt and seal on our single-shaft crusher is meticulously designed to ensure airtightness, prevent gas leakage, and guarantee safe air quality in the factory.

3. Low-Speed, High-Torque Shearing: Compared to high-speed impact crushers, we utilize low-speed blades to minimize heat generation and further reduce the thermal load on materials.