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Safety Characteristics:

NO. Items Technical Requirements Test Methods & Steps
1 Overcharge Test No explosion. No fire. a)Standard charge;
b)Charged to 6.3V with 30A current, or charged for 90min, observing for 1h.
2 Over-discharge Test No explosion. No fire. No leakage. a)Standard charge;
b)Discharged with 30A current for 90min, observing for 1h.
3 Short-circuit Test No explosion. No fire. a) Standard charge;
b) Connect the cell(battery module) positive and negative terminals with wire for 10min directly. The resistance of external line should be less than 5mΩ, observing for 1h.
4 Nail penetration
No explosion. No fire. a)Standard charge;
b)Penetrate the cell(battery module) from the vertical direction throughout the inside plates with the φ6mm ~φ8mm needle at (25 ± 5) mm/s speed (needle stays in the battery) , observing for 1h.
5 Crushing Test. No explosion. No fire. a)Standard charge;
b)According to the following test conditions:
Squeezing direction: Pressure perpendicular to the battery plates;
Squeezing paper shape: half cylinder with 75mm diameter, whose length is more than the size of cell,but is less than 1m.
Squeezing speed: (5±1)mm/s;
Squeezing level: Until the battery voltage becomes 0V or the deformation is to 30% or the press is to the value listing in table 1 , stop squeezing;
c)observing for 1h.
6 Drop Test No explosion. No fire.
No leakage.
a)Standard charge;
b)The cell(battery module) drops with two terminals down from a height of 1.5m onto the cement floor freely, observing for 1h.
7 Heating No explosion. No fire. a)Standard charge;
b)Put the cell(battery module) into the incubator, the temperature is up from room to 130±2℃ at the speed of 5℃/min, and stop heating after lasting for 30min,observing for 1h.
8 Immersing in
No explosion. No fire. a)Standard charge;
b)The cell(battery module) is submerged into 3.5(wt)% NaCl solution for 2h entirely.
9 Temperature cycle No explosion. No fire.
No leakage.
a)Standard charge;
b)Put the cell(battery module) into the incubator, the temperature adjust according to table 2, repeating 5 times, and observing for 1h.
10 Low air pressure No explosion. No fire.
No leakage.
a)Standard charge;
b)Put the cell(battery module) into the low air pressure box, and set air pressure at 11.6 kPa, laying for 6h at room temperature, and observing for 1h.

Notes: 1、The module contains five or more cells in series.

2、 Refer to GB/T 31485-2015 power battery safety require and test methods for electric vehicles .

Table 1 Squeezing force selecting standard

Cell number /n Squeezing force/ KN
1 200
2~5 100×n
>5 500


Table 2 temperature and time of one temperature cycle test

temperature/℃ time/min Adding time/min Temperature change
rate ℃/min
25 0 0 0
-40 60 60 13/12
-40 90 150 0
25 60 210 13/12
85 90 300 2/3
85 110 410 0
25 70 480 6/7


NO. Items Specifications
1 Charge voltage 4.2V
2 Nominal voltage 3.6V
3 Nominal capacity 30Ah @ 0.33C Discharge
4 Typical capacity 30.5Ah
5 Charge current Standard Charging:  0.33C
Rapid charge:      1.0C
6 Standard Charging method 0.33C CC(constant current)charge to 4.2V,then CV(constant voltage 4.2V)charge till charge current decline to ≤0.033C
7 Charging time Standard Charging: 4hours(Ref.)
Rapid charge:      2hours(Ref.)
8 Max.charge current 1.0C
9 Max.discharge current 2.0C
10 Discharge cut-off voltage 3.0V
11 Operating temperature Charging:  10℃~45℃
12 Storage temperature -20℃~ +55℃
13 Cell Weight ≈530g
14 Cell Dimension Length   :203mm Max
Width    :134mm Max
Thickness :9.3mm Max

Electrical characteristics:

NO. Items Test Method and Condition Criteria
1 Standard Charge Charging the cell initially with constant current at 0.33C and then with constant voltage at 4.2V till charge current declines to 0.033C  


2 Rated Capacity The capacity means the discharge capacity of the cell, which is measured with discharge current of 0.33C with 3.0V cut-off voltage after standard charge. ≥30Ah
3 Cycle Life Test condition:
Charge:0.33C to 4.2V
Discharge:0.5C to 3.0V
80% or more of 1st cycle capacity at 0.33C discharge of Operation
4 Self-discharge After the standard charging, storied the cells under the condition as No.4.4 for 30 days, then measured the capacity with 0.33C till 3.0V Residual capacity >90%
5 Initial impedance Internal resistance measured at AC 1KHz after 50% charge ≤2mW
6 Cell Voltage As of shipment. 3.5V~4.1V
7 Temperature
1. According to item 4.1.1, at 23±5℃.
2. Capacity comparison at each temperature, measured with constant discharge current 0.33C with 3.0V cut-off. Percentage as an index of the capacity compared with 100% at 23℃
55℃: ≥96%
23℃: 100%
-20℃: ≥70%     
8 Storage
1. According to item 4.1.1, at 23±5℃.
2. The battery shall be stored at 55±5℃ for 7days and rested at room temperature for 1 hour then measured with constant discharge current 0.33C with 3.0V cut-off.
Retained Capacity


3D effect picture of the battery:



Drawing (all unit in mm, not in scale)





Item Specifications
T 9.3Max
W 134Max
L 203Max
L1 40±1
M 67.5±2
N 35±1.0


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