EVE 280Ah battery datasheet

In this post,I will share you the eve 3.2v 280Ah cell datasheet.

The product can be applied for Vehicle power supply, Storage system, etc

1.Technical Parameter For EVE 280Ah Cell

#ItemParameterRemark
1Nominal Capacity280.0 Ah  (25±2)℃,Standard charge and discharge
2Typical Voltage3.2 V
3AC Impedance Resistance(1KHz)≤0.25 mΩ
  4 Standard charge and dischargeCharge / discharge current0.5 C/0.5 C 
  Cut off voltage of charge / discharge3.65 V/2.5 V
  5 Maximum charge/ discharge currentContinuous charge / discharge1 C/1 C According to continuous / pulse charge and discharge ammeters
Pulse charge / discharge (30s)2 C/2 C
6Recommended scope of SOC10%~90%N.A.
7Charging Temperature0 ℃~55 ℃ According to continuous / pulse charge and discharge ammeters
 8 Discharging Temperature -20 ℃~55 ℃
#ItemParameterRemark
  9 Storage temperature Short term (within 1 month)-20 ~℃45 ℃   N.A.
Long term (within 1 year)0 ℃~35 ℃
 10 Storage humidity range <90%
 11 Self-discharge rate per month ≤3%/monthTemperature:(25±2) ℃,Storage scope of SOC: 30%~50%SOC
12     DimensionWidth173.7 ±0.5 mm      Refer to Appendix I
 13Thickness (under 300±20 kgf , 30%~40% SOC )72.0 ±1.0 mm
Average thickness (200 pcs, under300±20 kgf , 30%~40% SOC )72.0 ±0.5 mm
14High(total)207.5 ±0.5 mm
15High(subject)204.6 ±0.5 mm
16Tabs Distance123.0±0.3 mm
 17 Battery weight 5.42±0.3 kg

2.Electrical performance for eve 280ah cell

No.ItemRequirementsMeasuring Procedure
  1 Rate discharge performance at 25℃ Discharge capacity/nominal capacity×100 %A)0.5C (A) ≥100% B)1.0C (A) ≥98%After standard charge and 1h rest, discharge to 2.5V cutoff with the current of 0.5 C (A), 1.0C (A), respectively. If the discharge capacity fails to meet the technical requirements, this test isallowed to be repeated three times
  2Discharge performance at different temperature Discharge capacity/nominal capacity×100 % A)55℃≥95%(Cutoff 2.5V) B)-20℃≥70%(Cutoff 2.0V)Measure the initial capacity and state of the battery:A) after standard charge and 5h rest at 55℃, discharge to 2.5V cutoff with the current of 0.5C(A);B) after standard charge at 25±2 ℃ and 24h rest at -20℃±2 ℃, discharge to 2.0Vcutoff with the current of 0.5C(A).
     3  The capacity retention and recovery at25 ℃     Capacity Retention ≥ nomi nal capacity×95% Capacity Recovery ≥ nomi nal capacity×97%Measure the initial capacity and state of the battery, after standard charge and stored for 28 days, discharge to 2.5V cutoff with the current of 0.5C (A), calculate the remaining capacity, the retention can be expressed as a percentage of nominal capacity. After standard charged and 30mins rest, calculate the discharging capacity (Ah), the recovery can be  expressed as a percentage of nominal capacity. The recovery is measured with discharge current0.5C (A) with 2.5V cut-off at (25±2 ) ℃.
  4 cycle life at 25℃  ≥6000 cycle @0.5C/0.5CUnder the 300kgf clamp, after standard charged and 30mins rest, discharge to 2.5V cutoff  with  the  current  of   0.5C(A)   at (25±2 )  ℃, and then  start the next cycle,endwith  the  capacity  decreasing  to  80%  of  the
  initial capacity. The number of cycles isdefined as the cycle life of the battery.
   5  cycle life at 45℃   ≥2500 cycle @0.5C/0.5CUnder the 300kgf clamp, after standard charged and 30mins rest, discharge to 2.5V cutoff  with  the  current  of   0.5C(A)   at (45±2 ) ℃, and then start the next cycle,end with the capacity decreasing to 80% of the initial capacity. The number of cycles isdefined as the cycle life of the battery.
 6End of life managementcapacity/nominal capacity<70%During the use of the battery, the  battery  s hall be stopped when the end of life regul ations are exceeded.

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