Enerkey Hardware BMS 7S 200A Peak 300A Li-ion Lithium Battery Pack
with Balancing Function
Lithium iron phosphate batteries cannot be without protection
boards. Lithium iron phosphate batteries have many superior
characteristics such as high energy, wide operating temperature
range, stable operating voltage, and long storage life. However,
lithium iron phosphate batteries also have instability problems
such as fire in harsh environments. Therefore, the protection board
is very important for the safety protection of lithium iron
phosphate batteries.
When choosing a lithium battery protection board, you need to see
what battery cell is used, whether it is a ternary lithium battery
or a lithium iron phosphate battery. These two types of lithium
batteries cannot be mixed. Select the corresponding protection
board according to the battery cell. After the type of protection
board is selected, you need to choose the voltage of the protection
board, that is, how many batteries are bought, how many V are
connected in series, and how many batteries are used. For example,
16 batteries connected in series are 16 strings, so you must buy a
protection board for 16 strings.
The maximum cut-off voltage for charging a single cell of a ternary
lithium battery is 4.2V, the standard voltage is 3.7V, and the
general minimum cut-off voltage for discharge is 3V. The maximum
cut-off voltage for charging a lithium iron phosphate battery is
3.65V, the standard voltage is 3.2V, and the minimum cut-off
voltage for discharge is 2.5V. How many V is the original battery
of an electric vehicle? You can calculate it using the standard
voltage of each cell of a lithium battery. For example, the
original lead-acid battery of an electric vehicle is 48V. If you
want to replace it with a lithium iron phosphate battery, the
standard voltage of each lithium iron phosphate battery is 3.2V. 15
strings are 48V. In actual use, 16 strings are used, which is more
than 3V higher than the original battery. This will not damage the
controller and motor, but has many advantages. Many people use it
this way.
In addition, the working current must be calculated through the
motor power on the electric vehicle. The discharge current of the
selected protection board must be greater than the working current
of the electric vehicle. The capacity of the lithium battery cell
used must also be used to select a protection board that can meet
the charging current.
Technical Parameters
| | Item type | Parameters |
| 1 | Parameter Overview | Product Model | EK-BM5R7S200A | EK-BM5R7S200A | EK-BM5R7S200A | EK-BM5R7S200A |
| Product Size(mm) | L120*W68*T15 | L120*W68*T15 | L120*W68*T15 | L120*W68*T15 |
| Product Weight(kg) | 0.12 | 0.12 | 0.12 | 0.12 |
| Product Material | FR-4 / Lead-free spray tin | FR-4 / Lead-free spray tin | FR-4 / Lead-free spray tin | FR-4 / Lead-free spray tin |
| Applicable battery type | Lifepo4 | Li-ion | Lto | SIB |
| Applicable battery string number | 5S / 6S / 7S | 5S / 6S / 7S | 5S / 6S / 7S | 5S / 6S / 7S |
| Rated discharge current | 200A | 200A | 200A | 200A |
| Peak starting current | 300A | 300A | 300A | 300A |
| | Item type | Trigger
(time) | Trigger
(time) | Trigger
(time) | Trigger
(time) | Trigger
(time) | Trigger
(time) | Trigger
(time) | Trigger
(time) |
| 2 | Charging protection | Overvoltage protection voltage value | 3.65V/1s | 3.50V/1s | | | | | | |
| Balanced phase difference voltage value | 30Mv/1s | / | | | | | | |
| Balanced voltage value | 3.45V | / | | | | | | |
| Overcurrent value | 60A/2s | / | | | | | | |
| ①Low temperature value | -5℃/2s | 0℃/2s | | | | | | |
| ①Overtemperature value | 75℃/2s | 65℃/2s | | | | | | |
| ②Low temperature value | -5℃/2s | 0℃/2s | | | | | | |
| ②Overtemperature value | 55℃/2s | 50℃/2s | | | | | | |
| 3 | Discharge protection | Undervoltage protection voltage value | 2.3V/0.5s | 2.7V/0.5s | | | | | | |
| ①Overcurrent protection value | 120A/2s | / | | | | | | |
| ②Overcurrent protection value | 160A/250ms | / | | | | | | |
| Short circuit protection value | 500A/64us | / | | | | | | |
| ①Low temperature value | -20℃/2s | -10℃/2s | | | | | | |
| ①Overtemperature value | 80℃/2s | 55℃/2s | | | | | | |
| ②Low temperature value | -20℃/2s | -10℃/2s | | | | | | |
| ②Overtemperature value | 65℃/2s | 60℃/2s | | | | | | |
| 4 | Others | Standby current consumption | 25mA/180s | / | | | | | | |
| Motherboard lock voltage | 0.8V/30s | / | | | | | | |
Size $ Packing List
Package included:
1 * BMS
1 * NTC Terminal Cable
1 * Switch Cable
1 * Terminal Cable
6 * Terminal Lugs
6 * M5 Screws
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
