BMS 5A-25A for 1S 3.7V Lithium Battery
Single-cell (1S) lithium battery protection board engineered for 3.7V Li-ion / Li-polymer cells. Supports continuous discharge currents of 5A, 10A, 15A, 20A or 25A with instantaneous/peak capability up to 50A (model dependent). Provides reliable overcharge, over-discharge, overcurrent, short-circuit and temperature protections. Low main-circuit resistance and high precision voltage detection deliver safe operation and extended cycle life for portable power, electric mobility and power tools.
Description
3.7V Lithium Battery Protection Board (5A–25A High Current BMS)
This 3.7V Lithium Battery Protection Board is designed for single-cell Li-ion and Li-polymer batteries. It provides overcharge, over-discharge, overcurrent, and short-circuit protection, ensuring stable and safe operation even under heavy load. Built with high-quality MOSFETs and intelligent ICs, this board supports high discharge current (5A–25A) while maintaining compact size and low heat generation.
Ideal for engineers and manufacturers who need a reliable BMS for high-current applications, such as power tools, e-bikes, and energy storage devices.
Technical Specifications
| Item | Specification |
|---|---|
| Battery Type | Li-ion / Li-polymer |
| Nominal Voltage | 3.7V (Single Cell) |
| Charge Voltage | 4.25V ± 0.05V |
| Overcharge Detection Voltage | 4.25V ± 0.05V |
| Overcharge Release Voltage | 4.10V ± 0.05V |
| Over discharge Detection Voltage | 2.50V ± 0.08V |
| Over discharge Release Voltage | 3.00V ± 0.10V |
| Over current Protection | 5A / 10A / 15A / 20A / 25A (optional) |
| Short-Circuit Protection | Yes |
| Operating Temperature | –20°C to +60°C |
| Internal Resistance | < 50mΩ |
| Balance Function | Optional |
| Board Size | 36mm × 12mm × 3mm (varies by model) |
| Weight | Approx. 3–5g |
| Wiring Method | B+, B–, P+, P– |
| Protection IC | High-precision IC chip with low power consumption |
| MOSFET | High current, low internal resistance type |
Features
- Intelligent BMS control circuit with precision protection thresholds.
- Multiple current options (5A–25A) for flexible design needs.
- Compact size and light weight, suitable for limited installation space.
- High reliability components, ensuring long service life.
- Stable protection even during peak current discharge.
Application Range
- Electric tools
- LED lighting systems
- Smart toys and RC models
- Portable power supplies
- E-bike and e-scooter battery packs
- DIY lithium battery projects
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