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Brand Name: | Enerkey |
Model Number: | EK-BM3R4S120A |
MOQ: | 50pieces |
Price: | $36.45-$37 |
Packaging Details: | Strong paper box +EVA Foam |
Payment Terms: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
Monitoring: The BMS monitors the state of the entire battery cells on a cell-by-cell basis.
Voltage measurement:
The BMS measures the voltage of each battery cell or the overall voltage of the battery pack, thereby preventing an overcharging or excessive discharging.
Current measurement:
The BMS measures the discharge current from the battery or the charge current to the battery. It checks the use status or the charged state of the battery and performs proper control.
Temperature measurement:
The BMS constantly monitors the temperature of the battery through a temperature sensor. Using the battery within a proper temperature range ensures the safety of the battery and longer service life.
Control:The BMS eliminates variations in performance of individual battery cells to allow them to work uniformly.
A large-capacity battery pack consists of a number of battery cells. These cells vary in performance, and deteriorate at different rates. For example, when a specific cell deteriorates faster than other cells do,
it may affect the overall performance or service life of the battery pack. Such variations in performance or deterioration rate are eliminated by a function called "balancing."
Item type | Parameters | |||||||||
1 | Parameter Overview | Product Model | EK-BM3R4S120A | EK-BM3R4S120A | EK-BM3R4S120A | EK-BM3R4S120A | ||||
Product Size(mm) | L75*W68*T15 | L75*W68*T15 | L75*W68*T15 | L75*W68*T15 | ||||||
Product Weight(kg) | 0.08 | 0.08 | 0.08 | 0.08 | ||||||
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 | 3S / 4S | 3S / 4S | 3S / 4S | 3S / 4S | ||||||
Rated discharge current | 120A | 120A | 120A | 120A | ||||||
Peak starting current | 160A | 160A | 160A | 160A | ||||||
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 | / |
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!
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.
![]() |
Brand Name: | Enerkey |
Model Number: | EK-BM3R4S120A |
MOQ: | 50pieces |
Price: | $36.45-$37 |
Packaging Details: | Strong paper box +EVA Foam |
Payment Terms: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
Monitoring: The BMS monitors the state of the entire battery cells on a cell-by-cell basis.
Voltage measurement:
The BMS measures the voltage of each battery cell or the overall voltage of the battery pack, thereby preventing an overcharging or excessive discharging.
Current measurement:
The BMS measures the discharge current from the battery or the charge current to the battery. It checks the use status or the charged state of the battery and performs proper control.
Temperature measurement:
The BMS constantly monitors the temperature of the battery through a temperature sensor. Using the battery within a proper temperature range ensures the safety of the battery and longer service life.
Control:The BMS eliminates variations in performance of individual battery cells to allow them to work uniformly.
A large-capacity battery pack consists of a number of battery cells. These cells vary in performance, and deteriorate at different rates. For example, when a specific cell deteriorates faster than other cells do,
it may affect the overall performance or service life of the battery pack. Such variations in performance or deterioration rate are eliminated by a function called "balancing."
Item type | Parameters | |||||||||
1 | Parameter Overview | Product Model | EK-BM3R4S120A | EK-BM3R4S120A | EK-BM3R4S120A | EK-BM3R4S120A | ||||
Product Size(mm) | L75*W68*T15 | L75*W68*T15 | L75*W68*T15 | L75*W68*T15 | ||||||
Product Weight(kg) | 0.08 | 0.08 | 0.08 | 0.08 | ||||||
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 | 3S / 4S | 3S / 4S | 3S / 4S | 3S / 4S | ||||||
Rated discharge current | 120A | 120A | 120A | 120A | ||||||
Peak starting current | 160A | 160A | 160A | 160A | ||||||
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 | / |
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!
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.