LITHIUM BALANCING CIRCUIT
In a battery with a balancing chip,the chip simply balances the voltages of the individual cells in the battery while it is charging. A battery isconsidered balanced when all the cell voltages are within a small tolerance of each other.
There are two types of cell balancing, active and passive. Active balancing occurs by using cels with high votages to charge cells with lowelvoltages thereby reducing the voltage difference between the cells until all cells are closely matched and the battery is fully chared.

Passivebalancing, which is used on all Power Sonic lithium batteries, is when each cellhas a resistor in parallel that gets switched on when the cell voltageis above a threshold. This lowers the charae current in the cells with a high voltage alowing the other cels to catch up.
Why is cell balancing important? in lithium batteries, as soon as the lowest voltage cell hits the discharge voltage cut off it will shut down theentire baterv. This mav mean that some cels have unused eneroy, Enerkey. tthe cells aren't balanced when charoing,

charoing wil be interuptedas soon as the cell with the highest voltage reaches the cut-off voltage and not all the cells will be fully charged.

What's so bad about that? continwaly charoing and discharging an imbalanced battery wilower the batery's capacity over time. This also meansthat some cells wil be fully charged, and others will not, resulting in a battery that may never reach 100% state of charge.
The theory is that balanced cells all discharge at the same rate, and therefore cutoff at the same voltage. This isn't always true, so having abalancing chip ensures that upon charging, the battery cells' can be fuly matched to protect the battery's capacity and to become fully.

 

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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* 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.

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