Description
2S 3 A Lithium-Ion Battery Protection / BMS Board
Protection board for a two-cell series lithium-ion pack, such as a pack made from 18650 cells. The source lists protection against short circuit, overcharge, over-discharge and overcurrent.
Important: the source calls this a charger but describes a protection board and does not specify a complete CC/CV charging input or control. Do not use the protection board alone as a charger. Use a charger designed for the exact 2S cell chemistry and configuration. Single-cell lithium-ion charging uses controlled CC/CV; series packs require a charger matched to the full pack and cell arrangement. See the Analog Devices charging reference.
Specifications stated in the source
- Pack described as two 3.6–3.7 V cells in series; source gives 7.2/7.4 V nominal and also mentions 8.4 V
- Charge cutoff: 4.23 ±0.05 V (the source does not say whether this is per cell or for the pack; verify the board documentation)
- Discharge cutoff: 2.54 ±0.1 V (the source does not clarify per-cell or pack basis)
- Maximum continuous current: 3 A
- Maximum peak current: 5 A
- Standby current: under 3 µA
- Operating temperature: −40 to +50 °C
- Dimensions: 36 × 6 × 1 mm
- Price: MAD 30
The current limits depend on the cell, wiring and installation. Match the pack and charger ratings, and verify the board’s cutoff values before connecting a lithium-ion pack. Incorrect charging or wiring can cause fire or injury.
