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EVE MB31 314ah 8000 Cycles LFP Cell Lithium Battery 3V Lithium Iron Phosphate

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EVE MB31 314ah 8000 Cycles LFP Cell Lithium Battery 3V Lithium Iron Phosphate

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City & Province changsha hunan
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Product Details

EVE MB31 314ah 8000 cycles LFP cell Lithium battery 3V Lithium Iron Phosphate

 

NOTES:

MB30 EVE 314ah
This EVE 314ah is Bolt Stud type,comes with free busbars
For lithium battery pack,deep cycles
Rated capacity314Ah
Rated voltage3.2V
Voltage range2.5V-3.65V
Cycle life10000 cycles,25 ℃ 70% SOH
Max charge current0.5C,157ah
Max discharge current0.5C,157ah
Initial internal resistance0.18mΩ±0.05mΩ
Weight5.6KG±0.3KG
size174*72*205mm
Discharging temperature-30-60℃


 

 

 

 

This item is EVE Lifepo4 3.2V 314Ah item,QR code, Grade A+, Brand new.

 

Internal resistance

Stacking cells have lower internal resistance,winding cells have related higher IR.

Winding cell is usually a single pole ear, while a stacking cell can be seen as a multi pole ear, greatly reducing its internal resistance.

The different internal resistances result in different heat generation and capacity decay rates during the charging and discharging cycles

of finished batteries. It is evident that stacked batteries have slower capacity decay.

 

Cycle life

For stacking batteries, the internal temperature distribution is relatively uniform,Due to the unidirectional heat transfer between the electrode and the

separator, the temperature gradient distribution of the winding battery is relatively severe, resulting in high internal temperature and low external temperature.

Uneven temperature distribution leads to the deactivation of active substances at high temperature positions during the charging and discharging process of the

battery, which prevents the function of lithium ion deintercalation and affects the rapid decay at other positions, thereby affecting the performance of the battery.

 

The internal stress of the battery cell

The edge of a winding battery cell is where stress is concentrated. Based on past battery disassembly analysis experience, the bending of the electrode is more prone to

micro short circuits, electrical breakdown, and lithium deposition.The stress concentration point is the primary location for battery deactivation, which also leads to a decrease

in the cycle life of wound batteries.

 

Charging&Discharging rate

The stacking cell is equivalent to parallel connection of multiple electrodes, making it easier to complete high current discharge in a short period of time, which is beneficial for the rate

performance of the battery. The winding process, on the other hand, is exactly the opposite, with a single pole ear resulting in slightly poorer rate performance.

 

Battery capacity density

Stacking batteries have a higher capacity density because their internal space is more fully utilized.

The winding type battery has circular cells on both sides and the last two layers of membranes occupy a certain thickness, resulting in a lower capacity density.

 

 

 

 

 
Before shipment

 

 

 

 

 

 

 

 

 

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