The DALY Lithium-Ion 20S 72V 50A Waterproof BMS is a high-quality Battery Management System designed for 20-cell Lithium-Ion battery packs. This smart BMS ensures the safe operation of your battery pack by providing protection against overcharge, over-discharge, overcurrent, and short circuits. It supports passive balancing to maintain voltage consistency across cells, thereby increasing battery efficiency and lifespan. With its waterproof design, it is ideal for use in e-bikes, solar systems, energy storage systems, and electric vehicles.

Key Features

1. Supports 20 series Lithium-Ion cells (20S)
2. 72V nominal battery system compatibility
3. Smart BMS with Bluetooth, UART, RS485, CAN.
4. Includes switch and buzzer for better protection support. 
5. 50A continuous discharge current
6. Full protection: overcharge, over-discharge, short circuit, temperature
7. Passive balancing for enhanced battery life
8. Compact and waterproof design for reliable outdoor usage

Specifications:

Parameter	Value
Battery Type	Lithium-Ion (Li-ion)
Series	20S (20 cells in series)
Nominal Voltage	72V
Continuous Discharge	50A
Charging Current	50A
Overcharge Detection	4.2V ± 0.05V per cell
Over-discharge Detection	2.50V ± 0.05V per cell
Overcurrent Protection	51A
Balance Function	Yes (Passive Balancing)
Balance Voltage	3.70V per cell
Communication	UART, RS485, Bluetooth, CAN
Waterproof	Yes
Temperature Range	-15°C to 60°C
Dimensions	125mm × 65mm × 13mm (typical)
IC Chip	Integrated Smart Protection IC

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Package Includes:

1 x DALY Smart BMS Lithium-Ion 20S 72V 50A Battery Management System Module

1 x Battery Connection Cable

1 x Bluetooth Module

1 x Buzzer/Alarm Module

1 x Switch with Connector

2 x Temperature Sensors(4 NTCs)

1 x Communication/Signal Cable