Brand new wholesale 3.1V sodium ion 18650 1500mah  battery cells for solar street lightning, scooters, e-bike 

ADVANTAGES for sodium ion 18650 cells:

Sodium ion battery has better safety performance:
The internal resistance of sodium ion batteries is high, and the current in the circuit is lower in the short -circuit of the battery, and the heat is less in an instant.
The standard electrode potential of the lithium is more negative, and it is more likely to lose electrons in the water solution than sodium, so the sodium ion battery has higher stability.
Sodium is highly activated. Under certain conditions, sodium branches crystal is more likely to cause self -ablation than lithium branch crystals, thereby avoiding spontaneous spontaneous combustion battery.
Sodium ion batteries are easily passivated during thermal control. In the safety tests such as over -charging, over -loading, squeezing, and acupuncture, the heat stability is far exceeding the national strong standard safety requirements.
When the lithium -ion battery is over -discharged, the metal copper will be deposited on the cathode to form a metal branches crystal copper. The growth of metal branches crystal copper will cause short circuits inside and cause serious heat hazards. The negative electrode of the sodium ion battery allows the use of aluminum foil as a collector, so that it can be safely discharged to 0V without any problems such as AL dissolution.

High -temperature performance: Sodium ion ion conductivity is high, the concentration of electrolytes is lower, and the electrolyte viscosity is lower than lithium ion batteries at low temperature, and the overall performance of the battery is better. The normal operating temperature range of sodium ion batteries is at -40 ℃ -80 ℃, and the capacity maintenance rate of some products can reach 88%at -20 ° C, which is significantly better than the capacity maintenance rate of about 60-70%of lithium iron phosphate.

Cell usage conditions

Temperature of charge：-10~45°C

Temperature of discharge:  -30〜60°C

Warning and cautions in handling the lithium-ion cell

1. Don't immerse the cell in water.

2. Don't use and leave the cell near a heat source such as fire orheater

3. When charging, use a cell charger specifically for that purpose.

4. Don't reverse the positive and negative terminals.

5. Don't connect the cell to an electrical outlet directly.

6. Don't discard the cell in fire or heater.

7. Don't connect the positive and negative terminal directly with metal objects.

8. Don't transport and store the cell together with metal objects such as necklaces, hairpins.

9. Don't strike, throw or trample the cell.

10.Don't directly solder the cell.

11. Don't pierce the cell with a nail or other sharp object.

12. When disposing of secondary cells, keep cells of different electrochemical systems separate from each other.