Description
BCPB2 is a highly reliable Lithium-Ion Battery Charging, Protection, and Balancing Board that operates with wide input range, 5-24V. This board is able to charge the batteries from input voltages above, below, or equal to the output voltages. It is designed for 3 in series 18650 Lithium-Ion Battery which provides approximately 30-40Wh energy. The MPPT charging integrated feature supports a 15-24V power supply. BCPB2 is complemented with a visualized display of battery level indicators. To ensure the reliability of this board, it is equipped with full protection circuit; overcurrent, over-temperature, short circuit, and over/under voltage protection. The battery balancing IC allows constant battery voltage between 3 in series 18650 Lithium-Ion cells. It is designed for industrial application with verified MTBF for low-temperature increment under rigorous design.
The battery charger and balance protection board is designed for 3 pcs 18650 Lithium batteries in series, which aren’t included in the package. You need to prepare the Lithium-ion batteries with 3.6V typical working voltage and 4.2V overcharge protection voltage. Besides, any other batteries especially LiFePO4 battery are prohibited.
Video for introduction and charging demonstration: link
Video for demonstration of modified BCPB2 charging Lead-acid battery: link
- TypeBattery Charger
- StyleModule & Board
- Charging Voltage from DC5V-24V
- Full Protection Circuit
- Charge and Discharge at the Same Time
- LED Indicators for Battery Level
- Solar Charging Supported
- Two Output Ports
- Battery Voltage Balancing
Parameters | Conditions | Min. | Typ. | Max. | Units |
Supply Voltage | Both wide input range, DC Jack (J3) and Wago 2060 (J4) through a diode. | 5.0 | - | 24.0 | VDC |
Solar panel input, Wago 2060 (J6) through a diode. | 15.0 | 19.0 | 24.0 | VDC | |
Supply Current | Supply current at both wide input range, DC Jack (J3) & Wago 2060 (J4) are limited by boost circuit only, so typical current limitations are same. | 0.75 | 1.5 | - | A |
Output Current | JST-PH (J9). The peak current is 8A for 200ms. | - | 4.0 | 4.0 | A |
Molex Micro-Fit (J11). The peak current is 12A for 200ms. | - | 6.0 | 6.0 | A | |
Charge current | Pre-charge current (0-140mA) might take hours before going to constant current charge mode at 0.6A typical. The charging current decreases dramatically after reaching constant voltage mode which start at 4.2V. The maximum charge current can only be obtained if Iin: 1.5A, Vin: 24V are supplied to the board. Charge current decreases if lower input current and voltage applied to the board. | 0.6 – 15% | 0.6 | 0.6 + 15% | A |
Over-Current Protection | Overcurrent protection circuit unable to function properly if the battery is connected directly to the load. The peak current is 14A for 150ms. | 6.0 | 7.0 (cont. and max.) | A | |
Battery Capacity | Use 2300mAh to get the typical value. Refer battery’s user manual if you are using your own Lithium-Ion battery. | 2300mAh 18650 Lithium-Ion Battery | |||
Overcharge Detection Voltage (per cell) | Once overcharge protection is triggered at 4.24V, users are supposed to wait until the voltage drops to ‘over voltage release voltage’, 4.18V and activate again for normal use. | 4.19 | 4.24 | 4.29 | V |
Overcharge Release Voltage (per cell) | 4.00 | 4.05 | 4.10 | V | |
Over-Discharge Detection Voltage (per cell) | A power supply must be plugged-in for the BCPB2 to have power output after installing or reinstalling batteries. Once the board goes into the protection mode, the same activation process should be executed to re-activate the board. | 2.72 | 2.80 | 2.88 | V |
Over-Discharge Release Voltage | 2.90 | 3.00 | 3.10 | V | |
Operating Temperature | For wide operation range version, please contact us for solutions. | 0 | 20 | 50 | ℃ |

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