1S 12A BMS PCM Board for 18650 Li-ion & LiFePO4 Batteries
1S 12A BMS PCM Board for 18650 Li-ion & LiFePO4 Batteries
1S 12A BMS PCM Battery Charging Protection Board — 3.7V Li-ion / 3.2V LiFePO4
Keep your 18650 lithium battery packs running safely and efficiently with this compact 1S 12A Battery Management System (BMS) / PCM Protection Board. Designed for single-cell Li-ion (3.7V) and LiFePO4 (3.2V) configurations, this board delivers reliable overcharge, over-discharge, and short-circuit protection in a small SMD package — ideal for DIY electronics, electric motors, power tools, and portable computer projects.
Made in Mainland China.
Key Features
- Dual Chemistry Support: Compatible with 3.7V Li-ion and 3.2V LiFePO4 18650 cells.
- 12A Continuous Current Rating: Handles demanding loads including electric motors and power tools.
- Overcharge Protection: Automatically cuts off charging at 4.2V, preventing cell damage.
- Over-Discharge Protection: Guards your battery from deep discharge to extend cell lifespan.
- Short-Circuit Protection: Instantly disconnects the circuit in the event of a short, protecting both the battery and connected devices.
- Wide Operating Temperature Range: Functions reliably from -40°C to +85°C for versatile use.
- Compact SMD Design: Slim profile fits easily into tight battery enclosures and DIY builds.
- No High-Concern Chemicals: Manufactured without restricted hazardous substances.
Specifications
| Cell Configuration | 1S (single cell) |
| Continuous Current | 12A |
| Charging Voltage | 4.2V (Li-ion) / 3.6V (LiFePO4) |
| Nominal Voltage | 3.7V Li-ion / 3.2V LiFePO4 |
| Package Type | SMD |
| Operating Temperature | -40°C to +85°C |
| Condition | New |
| Quantity | 1 piece per order |
Common Applications
- 18650 single-cell battery packs for DIY projects
- Electric motors and motorized devices
- Portable computers and laptop battery packs
- Power banks and USB charging devices
- RC vehicles and hobby electronics
- LED lighting systems and portable gadgets
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Frequently Asked Questions
Q: What is a BMS / PCM protection board and why do I need one for my 18650 battery?
A: A Battery Management System (BMS) or Protection Circuit Module (PCM) is an electronic board that monitors and controls the charging and discharging of lithium batteries. It prevents overcharging, over-discharging, and short circuits — all of which can permanently damage a lithium cell or pose a safety risk. Using a BMS is strongly recommended for any DIY 18650 battery build.
Q: Is this board compatible with both Li-ion and LiFePO4 cells?
A: Yes. This 1S BMS board supports both 3.7V Li-ion (charging cutoff at 4.2V) and 3.2V LiFePO4 (charging cutoff at 3.6V) 18650 cells, making it a versatile choice for a range of battery chemistries.
Q: What is the maximum continuous discharge current this board supports?
A: This protection board supports up to 12A of continuous discharge current, making it suitable for moderate-load applications such as small electric motors, power tools, and portable electronics.
Q: Can I use this BMS board for a multi-cell battery pack?
A: This board is designed for a 1S (single-cell) configuration only. For multi-cell series packs (e.g. 2S, 3S, or higher), you would need a BMS board specifically rated for that cell count.