Saline solution a bad idea.....
Submerging a lithium-ion cell in saltwater can lead to several dangerous outcomes due to the cell's reactive components and the conductive nature of saltwater. Here's what could happen:
1. **Short Circuit**: Saltwater is highly conductive. If the cell's terminals (positive and negative) are exposed, the water can create a path for electrical current, causing a short circuit. This can lead to rapid discharge, overheating, or even damage to the cell's internal structure.
2. **Corrosion**: Saltwater is corrosive, especially to metal components like the cell's terminals or casing. If the cell's protective casing is breached or already damaged, saltwater can penetrate, corroding internal components and potentially causing a failure.
3. **Chemical Reactions**: If the cell is punctured or its casing is compromised, saltwater can react with the lithium compounds inside. Lithium is highly reactive with water, producing lithium hydroxide and hydrogen gas. Hydrogen gas is flammable and can ignite, potentially causing a fire or explosion.
4. **Thermal Runaway**: A short circuit or internal damage from corrosion/reactions can cause the cell to overheat. This may trigger thermal runaway, where the cell's temperature skyrockets, potentially leading to a fire, release of toxic gases, or an explosion.
5. **Toxic Gas Release**: Damage to the cell could release hazardous gases like hydrogen fluoride (HF) or other volatile organic compounds from the electrolyte, which are toxic if inhaled.
### Key Factors
- **Cell Condition**: An intact, sealed lithium-ion cell with no exposed terminals is less likely to react immediately, but prolonged exposure to saltwater can still degrade the casing.
- **Saltwater Concentration**: Higher salinity increases conductivity, raising the risk of short-circuiting.
- **Duration**: The longer the cell is submerged, the greater the chance of corrosion or casing failure.
### Safety Risks
- **Fire/Explosion**: The combination of hydrogen gas, heat, and a damaged cell increases the risk of ignition.
- **Toxic Exposure**: Released gases or chemicals can harm health.
- **Environmental Hazard**: Leaking electrolytes can contaminate water.
### What to Do
- **Avoid Submersion**: Never intentionally place a lithium-ion cell in saltwater.
- **If Accidental**: If a cell falls into saltwater, do not touch it with bare hands. Use insulated tools to remove it, place it in a fireproof container, and dispose of it properly at a recycling or hazardous waste facility.
- **Ventilation**: Handle damaged cells in a well-ventilated area to avoid inhaling fumes.
- **Professional Help**: If the cell shows signs of damage (swelling, leaking, or heating), contact professionals for safe handling.
In summary, submerging a lithium-ion cell in saltwater is highly risky and can lead to fire, explosion, or toxic gas release. Handle with extreme caution and prioritize safety.
