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home > 5S 40A BMS Board 5S 40A 18650 Li-ion Lithium Battery Charger Protection Board - RS2874 > 5S 40A BMS Board 5S 40A 18650 Li-ion Lithium Battery Charger Protection Board - RS2874

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5S 40A BMS Board 5S 40A 18650 Li-ion Lithium Battery Charger Protection Board - RS2874Specification: Parameter Details Model RS2874 Battery Type Li ion (18650) Configuration 5S (5 cells in series) Charge Voltage 21V (4. 2V 5 cells) Discharge Cut off Voltage ~14. 5V (approx. 2. 9V per cell) Rated Charge Current 20A (recommended), max 40A Rated Discharge Current 40A Overcharge Detection Voltage 4. 25V 0. 05V Overcharge Release Voltage 4. 15V 0. 05V Over discharge Detection 2. 8V 0. 1V Over discharge Release 3. 0V 0. 1V Overcurrent

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Specification:

Name: 5S 40A BMS Board 5S 40A 18650 Li-ion Lithium Battery Charger Protection Board - RS2874
Brand: pannenkoekenrestaurants.nl
SKU: 99075619220
Price: 180.00 USD
Availability: InStock
Rating: 4.782100000000001 (2332 reviews)

Parameter	Details
Model	RS2874
Battery Type	Li-ion (18650)
Configuration	5S (5 cells in series)
Charge Voltage	21V (4.2V × 5 cells)
Discharge Cut-off Voltage	~14.5V (approx. 2.9V per cell)
Rated Charge Current	20A (recommended), max 40A
Rated Discharge Current	40A
Overcharge Detection Voltage	4.25V ± 0.05V
Overcharge Release Voltage	4.15V ± 0.05V
Over-discharge Detection	2.8V ± 0.1V
Over-discharge Release	3.0V ± 0.1V
Overcurrent Protection	60A–80A (typical)
Short Circuit Protection	Yes, automatic recovery
Balance Function	Yes (passive balancing)
Balance Voltage Threshold	~4.2V per cell
Working Temperature	-30°C to +80°C
Internal Resistance	< 100 mΩ
Board Dimensions	Approx. 65mm × 45mm × 8mm
Wiring Type	With 6-pin JST connector for cell monitoring
Application	E-bikes, DIY battery packs, solar storage, tools

Festures:

Features:

5-cell lithium battery pack management.
Supports high discharge current up to 40A.
Overcharge, over-discharge, overcurrent, and short-circuit protection.
Auto-recovery after protection trigger.
Passive cell voltage balancing for improved lifespan.
Compact and lightweight design.

Description:

The 5S 40A BMS (Battery Management System) board is designed to manage and protect 5-series (5S) 18,650 Li-ion battery packs. It supports a charging/discharging current of up to 40A, offering overcharge, over-discharge, overcurrent, and short-circuit protection. The board helps maintain battery longevity and safety in high-power applications such as e-bikes, power tools, DIY power banks, and energy storage systems. It balances each cell’s voltage during charging to improve overall performance.