40175L

ITEM

SPECIFICATION

Nominal capacity

25Ah @ 0.2C

Minimum capacity

24.5Ah @ 0.2C

Nominal voltage

3.2V

Max Charging voltage

3.65 ±0.05 V

Discharge ending voltage

2.5 ±0.05 V

Charge current

Standard charge: 0.5C

Max charge: 2C when T≥10 OC

Max charge: 1C when 10 OC≥T≥0 OC

Max charge: 0. 1C when 0 OC≥T≥- 10 OC

Discharge current

Standard discharge: 1C

Max continuously discharge: 3C

Max instant discharge: 6C

Recommended charge and discharge cell surface temperature

Charge: 0～45 OC

Discharge: -20～60 OC

Maximum allowable charge and

discharge cell surface

temperature. Charging and

discharging at these conditions will

shorten cell cycle life.

Charge: 60 OC

Discharge: 75 OC

Humidity range

0～90%RH (none condensing)

Internal resistance

≤4mOhm (AC Impedance, 1000HZ)

Cell dimension

Height: 176.0 mm Max

Diameter: 41.0mm Max

Weight

~520 g

Energy density

152Wh/kg

NO.

ITEM

CRITERION

5.1.1

Discharge

rate

capability

discharge capacity at 1C

≥24Ah

discharge capacity at 3C

≥23.2Ah

5.1.2

Cycle life

discharge capacity of 3000th cycle @100%DOD

≥20Ah

5.1.3

High-Low

temperature

discharge

performance

(0.5C

discharge)

discharge capacity at - 10 OC

≥20Ah

discharge capacity at 0 OC

≥18.7Ah

discharge capacity at 60 OC

≥24.5Ah

5.1.4

Storage

performance

residual capacity after 28d storage

≥24Ah

recover capacity after 28d storage

≥24.5Ah

ITEM

TEST METHOD

CRITERIO

N

5.2. 1 Over

discharge

Under the battery discharge to the cut-off

voltage, then discharge with 0. 1C, until the

voltage of battery is zero.

No explosion,

no fire, no

leakage

5.2.2 Over

charge

After the battery fully charge, overcharge

with 0.5C for one hour.

No explosion,

no fire, no

leakage

5.2.3 reverse charge

After the battery fully charge, with 1/6C

reverse current constant current charging for

8h.

No explosion,

no fire, no

leakage

5.2.4 130℃

high

temperature

After the battery is fully charged, the battery

is placed in the oven for 3OC ~ 7OC / min

heating rate, the temperature rose to 130 OC

after the start time, and (130 ± 2) OC

temperature range of security within 1h.

No explosion,

no fire, no

leakage

5.2.5 High

and low

temperature

impact

When the battery is fully charged, shelved

at -40 OC for 1h, then shelved 1h at 85 OC, do

such cycle for 32 times, then remove under

room temperature for 6h.

No explosion,

no fire, no

leakage

5.2.6

Vibration

When the battery is fully charged ,put the battery on the vibration table of amplitude 2mm, frequency 10Hz-30Hz for one hour.

No explosion,

no fire, no

leakage, no

deformation.

5.2.7 Free fall drop

After the battery fully charge, let the battery

fall from a height of 1.0m to the hard wood

with thickness of 20mm, each surface for

once.

No explosion,

no fire, no

leakage

5.2.8 Soaking

After the battery fully charged, the battery

was sink at room temperature, depth will be

subject to immersion cell surface within 24

h, then take out under room temperature for

6 h.

No explosion,

no fire, no

leakage

5.2.9 Extrusion

After the battery is fully charged, the battery

surface with special equipment was

squeezed until the batteries dimensions

changed to 1 ~ 3mm.

No explosion, no fire

5.2. 10 Short circuit

When the battery is fully charged, with the

internal resistance of not more than 50mΩ

wires connecting to the battery positive and

negative extremes for 1h.

No explosion,

no fire, no

leakage

5.2. 11 Constant

temperature/hu

midity/heat

After the battery fully charged the in the

relative humidity of 90% ~ 95% of the

constant temperature and humidity box,

duration of 48 h, then take out under room

temperature for 6 h.

No explosion,

no fire, no

leakage

5.2. 12 Nail

A nail (diameter : 2.5~5mm) is penetrated

vertically through the center of the fully

charged cells.

No explosion,

no fire, no

leakage