Lithium-ion batteries have been widely used in new energy vehicles (NEV) as large energy
storage systems (EES). Balancing among series-connected cells is necessary to avoid overcharging or over-discharging as well as improve the amount of usable energy. Different from
passive balancing, active balancing redistributes charges among cells or control cell output
powers, further improving battery efficiencies.

A new active balancing topology and its control algorithms are finally proposed by Enerkey,One supercapacitor is used in the balancing circuit which replaces the highest state of
charge (SOC) cell and is charged during the vehicle regeneration process. The supercapacitor also transfers energy to the lowest SOC cell after it is fully charged. This new balancing
strategy can not only improve balancing efficiency due to fewer times of energy conversion
but also reduce balancing time compared to the single capacitor balancing.

Technical Parameters

EnerKey BMS Active Balancer 5A 3S 4S 5S 6S 7S 8S 14S 16S 18S 19S 20S 21S LFP LTO LI-ION lifepo4 Balancer Capacitor Balancer
Product strings	4S	6S	8S	10S	12S	14S	16S	17S	21S
Suitable strings	3-4S	4-6S	6-8S	8-10S	9-12S	9-14S	12-16S	13-17S	17-21S
Size(LxWmm)	66*46	69*69	91*70	114*70	137*70	125*80	125*91	115*102.5	145*130
Weight with box(kg)	0.13	0.16	0.18	0.24	0.25	0.28	0.32	0.33	0.39
Thickness	16mm								18mm
Battery Type	NCM/LFP	NCM/LFP/LTO
Material	FR-4/HASL
Balanced Cascading	Support balanced cascading for battery packs, for example , it can cascade for 11S , 24S ,36S , 48S....and so on
Single cell voltage collection range	NCM/LFP version : 2.7V-4.2V
	LTO version : 1.8-4.2V
Undervoltage protects sleep voltage	NCM/LFP version＜2.7V
	LTO version＜1.8V
Equilibrium method	The whole battery group simutaneously participates in the energy transter active equalizatior
Equilibrium current	0.1V Differential pressure 1A Balanced current,
	the differential pressure is proportional to the balanced current,
	the maximum allowable operating current is 5.5A
Voltage equalization accuracy	5mV (typical value)
External power supply	No need for an external power supply,
	relying on the internal energy transfer of the battery to achieve sdjacent equalization.
Quiescent current	0.1mA(typical value)
Operating Temperature	-20℃ ~ +60℃

Packing List

Wire connect

NOTE:As shown in the figure above,there can be multiple common ends of energy exchangeso that the efficiency of equilibrium will be higher;It is also possible to use only one common end of theenergy exchange atthejunction of two modules.The other free feet are suspended, and it is best todistribute the number of strings equally on each board.If you need the cascade diagram for more strings, Please contact our online service, Thanks.

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.