Lithium ion parameters 

Model	LP-4S400E	LP-4S600E	LP-4S 120E
Normal Voltage	12.8V	12.8V	12.8V
Normal Capacity	40AH	60AH	120AH
Charge-Cut-off Voltage	14.6V	14.6V	14.6V
Charge Current	5-8A	8-10A	10-20A
Constant Discharger	30A	40-60A	80-100A
Battery Housing	Hard/Plastic case with	Hard/Plastic case with	Hard/Plastic case with
LED	N/A	LED indicator/SMbus	LED indicator/SMbus
Lifecycle	2000 cycles	2000 cycles	2000 cycles
Weight	4KG	6KG	15KG
Size	196*135*176mm	131*197*182mm	260*172*225mm
Certification	CE/MSDS and UN 38.3	CE/MSDS and UN 38.3	CE/MSDS and UN 38.3

Application

Apply for big power bank/back-up supplier/store power/solar power/LED lightings power/home storage system etc..

GENERAL ADVANTAGES OF LITHIUM ION BATTERY

1. Smaller and lighter: Li-ion battery is lighter than other rechargeable batteries in consideration of battery capacity. This makes it more practical in portable consumer electronic devices in which physical specifications such as weight and form factor are considered important selling points.

2. High energy density: Li-ion battery has higher energy density than other rechargeable batteries. This means having high power capacity without being too bulky. This is suitable for use in power-hungry devices such as laptops and smartphones. Advancements in technology open potential for higher capacities.

3. Low self-discharge: Li-ion battery also has a low self-discharge rate of about 1.5 percent per month. This means that the battery has a longer shelf life when not in used because it discharges slowly than other rechargeable batteries. Take note that nickel-metal hydride battery has a self-discharge of 20 percent per month.

4. Zero to low memory effect: Li-ion battery has zero to minimal memory effect. Take note than memory effect is a phenomenon observed in rechargeable batteries in which they lose their maximum energy capacity when repeated recharged after being only partially discharged. This memory effect is common in nickel-metal hydride rechargeable batteries such as NiCd and NiMH.

5. Quick charging: Li-ion battery is quicker to charge than other rechargeable batteries. It actually takes a fraction of a time to charge when compared to counterparts.

6. High open-circuit voltage: Li-ion battery has a chemistry that results in higher open-circuit voltage than other aqueous batteries such as lead acid, nickel-metal hydride, and nickel-cadmium.

7. Longer lifespan: Li-ion battery can typically handle hundreds of charge-discharge cycles. Some lithium ion batteries loss 30 percent of their capacity after 1000 cycles while more advanced lithium ion batteries still have better capacity only after 5000 cycles.

What is a BMS?

For example :

BMS stands for battery management system, this is the brain of our deep cycle lithium battery. The BMS protects the lithium cells from getting damaged in several scenarios. From low or high voltage, low or high temperatures, or if there is a short in the system. The BMS will shut off the battery to protect the li-ion cells and the user of the battery from unsafe operating conditions.

The BMS also regulates the amount of power you can take out of the battery. The BMS on our 100 amp-hour battery is rated to 100 amps continuous, 200 amps for 30 seconds and any higher loads for ½ second.

BMS also keeps all of the cells in balance. At the top of each charge cycle, the BMS reduces the charging rate in cells that have been topped off first, letting the rest of the cells catch up. This ensures that the cells are always in balance, and maintains the quality and efficiency of the pack.

BMS Circuit and Working

BMS Circuit with Adjustable Voltage

Service Range Technical support&joint venture

QSPOWER offer lithium battery technical consultant service such as factory
establishment, production plants arrangement, equipment installation &
maintaince and management consultant.
QSPOWER also make designation and produce high quality different kinds
of lithium battery.
We provide battery cells and make battery products R&D meanwhile
QSPOWER provide battery product inspection service for worldwide
customer etc.

Warning :

Make sure you DIY with correct polarity. (Negative polarity located at the top end)
Don’t use NiMH or Li-ion smart charger charge LiFePO4 cell/pack.
Wrong type of charger used may cause cell damaged.
You must limit discharging rate below Max rate
Please read more info about LiFePO4 battery