Description
HX-3S-FL25A-A 3S 12.6V 25A W/BALANCE 18650 LI ION LITHIUM BATTERY PCB PROTECTION BOARD — BOLTON SKU 54389.
About the HX-3S-FL25A-A 3S 12.6V 25A Li-Ion BMS Board
The HX-3S-FL25A-A is a protection and balancing board for three lithium-ion cells connected in series, giving a 12.6 V pack at full charge. It is rated for a continuous working current of up to 25 A with an instantaneous capability of 35 to 40 A, and it carries a balance connection so the three cell groups can be equalised during charging. Protection thresholds are set at an overcharge cut-off of 4.25 to 4.35 V per cell and an over-discharge cut-off of 2.3 to 3.0 V per cell, both quoted to ±0.05 V. Short-circuit protection is included and self-recovers after a delay. The board measures 56 x 45 x 4.0 mm, draws less than 30 µA static, and has an internal resistance below 100 mΩ. Operating range is -40 to +50 °C, with storage from -40 to +80 °C.
Key specifications
| Type | Lithium-ion battery protection board (BMS) with balancing |
|---|---|
| Configuration | 3S, 12.6 V at full charge |
| Continuous current | 0–25 A |
| Instantaneous current | 35–40 A |
| Overcharge cut-off | 4.25–4.35 V ±0.05 V per cell |
| Over-discharge cut-off | 2.3–3.0 V ±0.05 V per cell |
| Short-circuit protection | Yes, delayed self-recovery |
| Board size | 56 x 45 x 4.0 mm |
| Static current | Less than 30 µA |
| Operating temperature | -40 to +50 °C |
Typical applications
A 3S protection board of this current rating is fitted inside packs assembled from 18650 or similar cylindrical lithium-ion cells for portable equipment, small ground robots, lighting and power-tool style loads drawing up to about 25 A. The balance leads allow the pack to be charged on a balancing charger and keep the three groups matched over their service life. The wide operating range and the thin 4 mm profile suit packs built into confined enclosures.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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