

BMS (Battery Management System) – a battery management system that is designed to monitor the status of batteries, control the process of charging/discharging the battery, etc. RoboticsBD
Two batteries (18650) can be connected simultaneously to the charge-discharge controller module. The module has protection against short circuit, overcharge and over-discharge. One of the functions of the charge controller is to turn off the power supply for the batteries when the maximum capacity of at least one battery is reached. This BMS controller is designed for more than 30,000 hours of operation. The maximum allowable current is 20 A. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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B+ : Battery positive pole
B- : Battery negative pole
BM : Mid-point of a battery assembly
P- : Negative charge / discharge terminal
P+ :Positive charge/discharge terminal
If the maximum permissible value of the supply voltage is exceeded, the charge controller activates the “protection” mode. In order to restore the module, it is necessary to re-apply voltage to the input of the BMS board or wait a while until the charge controller automatically disables protection.
Power is supplied to the module from an external power source. The voltage range of the module is from 7.4 to 8.4 V. For charging, you can use a step-up voltage converter with a current limiter. Please note that this module is not a charger. RoboticsBD
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General Specification | |
Over Charge Voltage Range | 4.25-4.35 V + 0.05 V |
Over Voltage Range | 2.5-3.0 V + 0.05 V |
Max. Operating Current | 13 A |
Max. Limiting Current | 20 A |
Charging Voltage | 8.4-9 V |
Quiescent Current | Lower than 10 µA |
Internal Resistance | <300 Ohm |
Operating Temperature | -40°C to +50°C |
Length (mm) | 44.77 |
Width (mm) | 18.85 |
Height (mm) | 3.5 |
Weight (gm) | 4 |
Shipment Weight | 0.005 kg |
Shipment Dimensions | 4 × 4 × 1 cm |
Please allow 5% measuring deviation due to manual measurement.
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1 x 2S 20A 7.4V 8.4V 18650 Lithium Battery Protection Board/BMS Board Standard.
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The latest price of 2S 20A 7.4V 8.4V 18650 Lithium Battery Protection Board/BMS Board Standard in Bangladesh is BDT 125 You can buy the 2S 20A 7.4V 8.4V 18650 Lithium Battery Protection Board/BMS Board Standard at best price from our RoboticsBD or visit RoboticsBD Office.
Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. |
Product Images are shown for illustrative purposes only and may differ from the actual product. |
Reference: RBD-0563
Overcharging and Over Discharging Protection Short circuit protection: Yes Applicable assembly: Nominal 4.5V Batteries / 3 strings. RoboticsBD
Reference: RBD-1019
Charging Voltage: 12.6V-13V Overcharge Voltage Range: 4.25V-4.35V ± 0.05V Overpressure Voltage Range: 2.3V-3.0V ± 0.05V Upper Limit Operating Current: 5A-6A
Reference: RBD-1419
Model: 6S 15A 18650 Lithium Battery Protection Board Balanced charge: None Short circuit protection: Yes
Reference: RBD-1420
Over Charge Voltage Range: 4.25-4.35 V + 0.05 V Over Voltage Range: 2.5-3.0 V + 0.05 V Max. Operating Current: 13 A Max. Limiting Current: 20 A Charging Voltage: 8.4-9 V
Reference: RBD-1421
3S 11.1V 12.6V 20A 18650 lithium battery protection board (comes with recovery function-AUTO Recovery). Application: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650.26650, a polymer lithium battery). Continuous discharge current (upper limit): 20A (if the cooling environment is not good, please reduce the load current use). Continuous...
Reference: RBD-1474
This Lithium ion battery protection PCB protect single Lithium ion batteries. 20A continous current. Suitable for electric drills,motors,or aircraft models which require heavy current load.
Reference: RBD-1536
Over Charge Voltage Range: 4.25-4.35 V + 0.05 V Over Voltage Range: 2.5-3.0 V + 0.05 V Max. Operating Current: 13 A Max. Limiting Current: 20 A Charging Voltage: 8.4-9 V
Reference: RBD-1343
Compatible With: AA, AAA, 9V Battery red light show the charging situation 9V Battery Charger
Reference: RBD-1692
Color: Black lightweight Convenient to carry this battery box holder with wires Weight: About 9g Wire Length: Approx 14cm
Reference: RBD-1732
Raspberry Pi 4B/3B+/3B U100 UPS HAT Expansion Board Cooling Fan
Reference: RBD-2193
4-slot design allows for charging up to 4 batteries at a time Compatible with 1.2V AA/AAA Ni-MH/Ni-CD rechargeable batteries Equipped with safety features such as overcharge protection Can charge batteries individually or in pairs LED indicator lights show the charging status of each battery Can charge batteries in different type and size at the same...
Reference: RBD-1723
Model: XKT-412. Input Voltage: 12V. Output Voltage: 5V. Operating Current: 1.2-2 A. Receive Coil: 3mm, the receiver output 5V / 1A current Normal Use Distance: 2 ~ 10mm Operating Current: 1.2-2 A.
Reference: RBD-0732
Excellent material It is an environmental 9V battery buckle The Cable Length: 12cm Approx. Convenient for connecting a battery to your application. Save power and protect the environment Good electrical conductivity and comfortable sense of touch
Reference: RBD-1760
Model: 18650 radiating battery spacer Material: ABS/PC (Remarkable Flame Retardant Plastic) Dimension: 40 x 20 x 8 mm (LxWxH) (without lock slots). Application: Design for Radiating Complex Battery Packs. Safe and Stable, Perfect Build for eBike!
Reference: RBD-0963
Current and voltage display in turn, easy and comfortable to use. Small and portable, do not need other power supply. Measuring range: DC 3V – 9V / 0 – 3A (up to 5A ) Portable Device Interface: USB2.0, USB3.0 Product Weight: 0.025 kg Two output ports
Reference: RBD-0919
Dimension: 25 x 19 x 10 (LxWxH)mm. Input interface: micro USB. Current Protection: Yes Charging mode: Linear charging. Current: 1A adjustable. Charge precision: 1.5%. Input voltage: 4.5V-5.5V. Full charge voltage: 4.2V.
Reference: RBD-1718
Model: BT-168 PRO Product Name: Digital Battery Tester Type: Pointer Voltage Measurement Rated Voltage: 9V Measurement Accuracy:0.1V
Reference: RBD-1944
Cell Quantity: 5 Battery type: AA Storage temperature: 25ºC Max Operate temperature: 80ºC
Reference: RBD-0212
Input: 110v or 240v A/C (50/60Hz) Cell Count: 2~3s Battery Type: LiPoly Output Current: 3 x 800mA
Reference: RBD-0652
Constant 9V Output till lasts Metal Jacket Body Good Built Quality and hence Leakproof Easy to install and Replace Corrosion free Connector Point for long-term use 0% Mercury and Cadmium. Environment-friendly OEM Compatible. RoboticsBD
Reference: RBD-1087
Uninterruptible Power Supply Mini UPS Modem, Router, CCTV Camera and Lighting 6000mAh 22.2W
Reference: RBD-2175
4-port charger for single-cell 3.7V LiPo batteries Uses MCP73831T Charge Management Controller IC for reliable charging Standard Mini USB socket for 5V USB power source Selectable charging rates of 500mA or 100mA (default set to 500mA) Status LED indicates charging status Suitable for 3.7V LiPo or Li-ion batteries with Micro JST Connector USB charger...
Reference: RBD-1908
Doublepow AAA 900MAH Battery 2pcs/Set 1.2V Ni-MH Rechargeable Battery
Reference: RBD-2208
2x 18650 Lithium Battery Shield V8 Mobile Power Expansion Board Module 5V/3A 3V/1A Micro USB for Arduino ESP32 ESP8266 Output port: USB or expansion port Output parameter 5V / 3A or 3.3V / 1A. Conversion efficiency up to 95% Input port: MicroUSB
Reference: RBD-0999
Holds 4 AA batteries The standard 5.5×2.1mm barrel jack at the output. Easy install, convenient to use. Dimensions mm (LxWxH): 62 x 58 x 15 Weight: 15 gm Material: Plastic Internal Connection: Series
Reference: RBD-1556
Model: XH-M240 Display accuracy: 0.1 Measurement accuracy: 1mAH Power supply: DC 5V-12V Standby current: 5-7mA
Reference: RBD-1320
Rechargeable1.2V AA Ni-MH Rechargeable batteries come pre-charged, ready to use Rechargeable1.2V AA Ni-MH Rechargeable batteries can be recharged 100’s times Ideal for wireless video game controllers, baby toys, wireless electronics, and more They work in any NiMH charger
Reference: RBD-2042
Model: LilyPad Color: Purple Material: CCL Dimensions: 30 x 30 x 6 (LxWxH) mm. Weight: 3 gm.
Reference: RBD-1743
Holds 6 x AA batteries Easy install, convenient to use. Dimensions mm (LxWxH): 58X 48 X 28 Weight: 15.6 gm Material: Plastic Internal Connection: Series
Reference: RBD-1922
The Successful start of the drill requires three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 cannot start the drill!!) Strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not deliberately short circuit.
Reference: RBD-1893
Input interface: micro USB. Current Protection: Yes Charging mode: Linear charging. Current: 1A adjustable. Charge precision: 1.5%. Input voltage: 4.5V-5.5V. Full charge voltage: 4.2V.
Reference: RBD-1892
Input interface: micro USB. Current Protection: Yes Charging mode: Linear charging. Current: 1A adjustable. Charge precision: 1.5%. Input voltage: 4.5V-5.5V. Full charge voltage: 4.2V.
Reference: RBD-1907
Doublepow AA 1200MAH Battery 2pcs/Set 1.2V Ni-MH Rechargeable Battery
Reference: RBD-1674
Xtar MC1 charger Output current :500-50mA Universal Charger for : Charge for :10440/ 14500/ 14650/ 16340/ 17500/ 17670/ 18350/ 18500/ 18650/ 18700/ 22650/ 25500/ 26650 3.6/3.7V rechargeable Li-ion battery With package box
Reference: RBD-1742
Holds 10 x AA batteries Easy install, convenient to use. Dimensions mm (LxWxH): 78X 60 X 28 Weight: 27.4 gm Material: Plastic Internal Connection: Series
Reference: RBD-0836
Model: 14500 Type: Li-Ion Battery Mark Capacity: 850mah Nominal Voltage: 3.7v Color: Blue Weight: 17g Rechargeable Battery: Yes Note: It's a clone battery so the ampere couldn't be guaranteed.
Reference: RBD-0696
Voltage : Input through (USB) DC 5V Output via (DC Round Pin) : DC 12V Color: BLACK Input / Output Current: Maximum Input 0.6 Easier for installation save time and money Easy to use.
Reference: RBD-0677
Using high-quality dual-panel design, with power indicator and TTL signal output instructions. The switching signal having a DO (TTL) output and analog output AO. TTL output valid signal is low. The higher the voltage, the concentration of the analog output voltage is higher. A hydrogen gas detection with good sensitivity. Has a long life and reliable...
Reference: RBD-0094
The Arduino Uno R3 High-Quality Edition Arduino UNO in Bangladesh Micro-controller : ATmega328. Operating Voltage : 5V. Input Voltage (recommended) : 7-12V. Digital I/O Pins : 14 (of which 6 provide PWM output). Analog Input Pins : 6. The Arduino Uno R3 High-Quality Edition embodies superior craftsmanship and meticulous attention to detail, resulting in...
Reference: RBD-2194
This 60/40 Tin-Lead solder contains 60% Sn (Tin) / 40% Pb (Lead) 170° - 185°C melting range Premium Quality Soldering Wire/Lead Low Melting Point Weight: 20-22 Gram 0.8mm Mix: 60% Sn / 40% Pb Known as Lead or Solder Wire Melting Temperature 170°C Approx. (Tested by RoboticsBD LAB) We suggest this solder wire/lead paired with this solder to make your...
Reference: RBD-0120
400 tie points 2 Power lanes, Total 100 tie points in power lanes 1 Double strip, Total 300 tie points Perfect for Arduino shield prototyping and testing Plastic housing, metal contact clips
Reference: RBD-0998
Product type: DC power jack connector Connector type: Male connector Shape: cylindrical Colour: black and silver Size: 2.1mm x 5.5mm x 9mm
Reference: RBD-1760
Model: 18650 radiating battery spacer Material: ABS/PC (Remarkable Flame Retardant Plastic) Dimension: 40 x 20 x 8 mm (LxWxH) (without lock slots). Application: Design for Radiating Complex Battery Packs. Safe and Stable, Perfect Build for eBike!
Reference: RBD-1039
The module was recycled from a mobile phone so you can say it is used. TTL serial port for serial port, you can link directly to the micro-controller. Don’t need MAX232. Power module automatically boots, homing network. Onboard signal lights all the way. It flashes slowly when there is a signal, it flashes quickly when there is no signal. In recent years...
Reference: RBD-0280
Tie-points: 170 (10×17) Size: 48 x 35 x 10 mm(LxWxH). Use: experimental, testing, robot Matching jumper, diameter 0.8mm Phosphor bronze nickel plated spring clips Accepts a variety of wire sizes (29-20 the AWG) **1 pcs Random Color