The function of the BMS is mainly to protect the cells of lithium
batteries, maintain safety and stability during battery charging
and discharging, and play an important role in the performance of
the entire battery circuit system.
Most people are confused as to why lithium batteries require a
lithium battery protection board before they can be used. Next, let
me briefly introduce to you why lithium batteries require a lithium
battery protection board before they can be used.
Technical Parameters
Enerkey Lithium Battery Protection Board (BMS) 3S 4S 5S 50A 11.2V 12.6V 16V 18V For Photovoltaic Solar Panels and Industrial Power & Home Energy
Storage System and Electric Car and Scooter and Motorcycle |
| Product model | EK-BM3r4S50A | EK-BM5S50A |
Suitable battery strings | | |
| Product size(mm) | L77.5xW26xT7.3 | L77.5xW26xT7.3 |
| Weight with box | 0.02kg | 0.025kg |
| Specical function | NTC(option) |
| Suitable battery type | Lithium(NCM) |
| Rated discharge current | Typ 40A / Max 50A |
| Rated working voltage B+B- | Max 30V |
| Peak starting current | Typ 60A |
P+P- input withstand voltage | Max 40V |
Charging overcurrent protection value | Not limited |
| Charge detection voltage | Min 4.2V / Typ 4.225V / Max 4.25V |
Charge detection delay time | Min 0.5S / Typ 1S / Max 1.3S |
Overcharge release voltage | Min 4.0V / Typ 4.005V / Max 4.05V |
Discharge detection voltage | Min 2.65V / Typ 2.7V / Max 2.75V |
| Discharge detection delay time | Min 20ms / Typ 100ms / Max 150ms |
| Discharge release voltage | Min 2.85V / Typ 2.95V / Max 3.05V |
Conditions for lifting protection | Disconnect external load or charge self-recovery |
| Overcurrent detection voltage | Typ 0.1V |
| Over current protection current | Min 75A / Typ 80A / Max 85A |
| Overcurrent protection time | Min 0.7S / Typ 1S / Max 1.3S |
| Conditions for lifting protection | Disconnect external load or charge self-recovery |
| Short circuit protection current | Typ 80A |
| Detection delay time | Min 150μS / Typ 250μS / Max 400μS |
| Conditions for lifting protection | Disconnect external load or charge self-recovery |
| Main circuit on-state resistance | Typ 9mΩ / Max 10mΩ |
| Normal working current consumption | Typ 10μA / Max 15μA |
| Current consumption during sleep | Max 2.5μA |
Operating Temperature | |
Size $ Packing List
Wire Diagram
Wiring precautions:
1. Installing the protective board requires a certain amount of
technical electronic knowledge.
2. When wiring, first connect the B- wire at the soldering pad
position to the total negative terminal of the battery (the B- wire
should be soldered to a short and thick wire) and solder the wired
terminal to the battery pack first, and then insert the protective
plate.
3. The connection between the battery terminal B- and the
protection board terminal B- should be short and thick, otherwise
it will cause the protection board to charge and discharge in
advance and malfunction.
4. You need to use thick wires when wiring P+/P-. Wires that are
too thin and too long will burn the board!
FAQ
Q1. Why did we choose you?
* We can provide you with efficient after-sales service, with more
than 10 years of strong technical support.
* Products have passed FCC, CE, ROHS and other international
standards certification.
* We can provide you with factory price, Welcome you to visit our
factory and production process.
Q2. What is your product range (type)?
*We mainly do battery management systems in the fields of power
batteries, energy storage batteries and consumer batteries.
*Mainly used for LFP, Li-ino and LTO batteries.
Q3: How do I know which kind of material & type my battery is ?
*Please look the battery body, If the normal voltage of your
battery shows 3.2V, The battery is LiFePo4.
*If the normal voltage of your battery shows 3.6V or 3.7V, the
battery is Li-ion or Lto battery.
Q4. Do you have minimum order requirements?
Can it be customized? What is the lead time for samples and
batches?
*Our minimum order quantity is 1 piece, ODM customization is
available.
* 1~3 days delivery of existing samples, 3~10 days delivery of
customized samples.
Q5: What if i can't use it?
*Regular products have instructional videos, We can also support
online video call guidance from engineers.
Q6. What are your terms of payment?
*We accept wire transfer and cash payment, all negotiable. Payment
method :visa, mastercard, T/T, PayPal, APPLE_PAY, GOOGLE_PAY,
GC_REAL_TIME_BANK_TRANSFER, RMB
Q7. How do you guarantee the quality?
* All our products are subjected to professional laboratory 100%
testing, as well as repeated aging tests.
* Obtained FCC, CE, ROHS and other international standard
certification.
* Provide 3 years after-sales warranty service. Free spare units
for replace in 3 years.
Q8. How to choose a BMS suitable for our battery?
*Depending on the voltage and current that matches your battery,
you can consult our customer service and we will provide it for you
equipped with the most suitable battery management system.
Q9. How can i contact you?
*We have 7x24 hours online service, Please leave us a message
online.
*You can also contact us by Email, WhatsApp, WeChat, etc(see
below). We are so glad to work with you.
Noted: We are source manufacturer, We have own brand for "EnerKey",We can customized product as your requirement(Voltage, Wire,Etc) .
We can provide you competitive price in the market if you have bulk
order, Please don't hesitate to contact us.
Mobile & WhatsApp & Wechat: +86 15387469240; Email: kiwi@enerkey.cn
