Electric vehicle battery packs consist of numerous individual cells connected in series and parallel configurations. Over time, due to various factors such as manufacturing variations, aging, and operating conditions,

these cells may experience slight variations in their state of charge (SoC) and capacity. Cell balancing is the process of equalizing the charge levels and capacities of these individual cells to maximize the overall performance and lifespan of the battery pack.

The Importance of Cell Balancing in Electric Vehicle Battery Packs
Effective cell balancing is essential in electric vehicle battery packs for several reasons.

Firstly, it maximizes the usable capacity of the battery pack, allowing for longer driving ranges and improved performance.

Secondly, it enhances the safety of the battery pack by preventing overcharging or undercharging of individual cells, which can lead to thermal runaway and potential safety hazards.

Finally, proper cell balancing ensures the longevity of the battery pack, reducing the need for premature replacements and minimizing costs for EV owners.

 

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 model	EK-C10S5A	EK-C12S5A	EK-C14S5A
Product strings	10S	12S	14S
Suitable strings	8-10S	9-12S	9-14S
Product Size(mm)	L114*W70*T16	L137*W70*T16	L125*W80*T16
Weight with box	0.24kg	0.25kg	0.28kg
Battery Type	NCM/LFP/LTO	NCM/LFP/LTO	NCM/LFP/LTO
Suitable capacity	30ah-300ah
Voltage equalization accuracy	5mV (typical value)
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
Under voltage protection Start balancing voltage	NCM/LFP version: 2.835V
	LTO version: 1.89V
Equilibrium method	Patented (Patent No.: ZL 2019 1 1259513.3) balanced architecture Fit capacitor method, the entire battery pack is balanced at the same time. Connect to the battery pack for automatic balancing (default). You can add a switch to manually turn on or off balancing.
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
External power supply	No need for an external power supply,
	relying on the internal energy transfer of the battery to achieve sdjacent equalization.
Quiescent operating current	7mA, the total string draws power
Sleep standby current	0.1mA(typical value)
Operating Temperature	-20℃ ~ +60℃

 

 

Packing List

 Wire connect

A single EK-C14S5A supports the use of 9 and 10 and 11 and 12 and 13 and 14 string battery packs. The wiring method is as follows:

 

EK-C14S5A supports cascading battery packs. Fox exmple, 2pcs of 14s cascade to 27s, see below drawing:

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.

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* 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?

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*You can also contact us by Email, WhatsApp, WeChat, etc(see below). We are so glad to work with you.