Product Description
Working process of protective board
1. How to activate the protective board
When the protection board P+ and P- have no output in the
protection state, you can short-circuit B+ and B- to activate the
protection board. At this time, Dout and Cout will be at low level
(the two ports of the protection IC are high-level protection,
low-level Normal) state to turn on these two switches.
2. Charging
P+ and P- are connected to the positive and negative poles of the
charger respectively. The charging current passes through the two
MOS to charge the battery. At this time, the VDD and VSS of the
protection IC are both the power supply terminal and the cell
voltage detection terminal (through R1).
As the charging As the process proceeds, the voltage of the battery
core continues to increase. When it reaches the protection voltage
of the battery core (overcharge protection voltage), COUT will
output a high level at this time to turn off the corresponding MOS
switch,
and the charging circuit will also be turned off. after overcharge protection, the cell voltage will drop. When it
drops to the IC voltage threshold (overcharge protection recovery
voltage), Cout returns to a low level and turns on the MOS tube.
3. Discharge
Similarly, when the battery is discharging, the VDD and VSS of the
IC will also detect the cell voltage. When the cell voltage drops
to the IC threshold (over-discharge protection voltage), Dout will
randomly output a high level to turn off the corresponding MOS
tube. off,
the discharge circuit is disconnected, and after over-discharge protection, the cell voltage will rise.
When it rises to the threshold voltage (over-discharge protection
recovery voltage), Dout returns to low level and opens the MOS
switch.
4. Overcurrent and short circuit
When the main circuit current is too large during the discharge
process, due to the internal resistance of the MOS saturated
conduction, a voltage drop will occur at both ends of the MOS tube
when the current flows between B- and P-,
protecting the V- and VSS of the IC. (via R2) will detect the
voltage at both ends at any time. When the voltage rises to the
detection threshold of the protection IC (usually 0.15V, discharge
detection overcurrent voltage),
Dout will immediately output a high level to turn off the
corresponding MOS tube, and the discharge circuit is disconnected.
Technical Parameters
Enerkey Lithium Battery Protection Board (BMS) 8S 9S 10S 40A 25.6V to 45V For Photovoltaic Solar Panels and Industrial Power & Home Energy
Storage System and Electric Car and Scooter and Motorcycle |
| Product model | EK-B8S40A | EK-B9S40A | EK-B10S40A |
Suitable battery strings | | 9S | |
| Product size(mm) | L77.5xW26xT7.3 | L77.5xW26xT7.3 | L77.5xW26xT7.3 |
| Weight with box | 0.02kg | 0.02kg | 0.02kg |
| Specical function | NTC(option) |
| Suitable battery type | Lithium(NCM) |
| Rated discharge current | Typ 40A / Max 50A |
| Rated working voltage B+B- | Max 45V |
| Peak starting current | Typ 60A |
P+P- input withstand voltage | Max 45V |
Charging overcurrent protection value | Not limited |
| Charge detection voltage | Typ 4.25V |
Charge detection delay time | Min 0.5S / Typ 1S / Max 1.3S |
Overcharge release voltage | |
Discharge detection voltage | |
| Discharge detection delay time | Min 20ms / Typ 100ms / Max 150ms |
| Discharge release voltage | Typ 3V |
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
This protection board supports 8S-10S
Different string number selections can be achieved by changing part
A.
8S: Connect the "8S" position with a 1K resistor;
The "10S" position is left blank.
9S: Leave the "8S" position blank;
The "10S" position is left blank.
10S: Connect the "10S" position with a 1K resistor;
The "8S" position is left blank.
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
