280Ah battery

Room Temperature 

25±2℃

Cell

A basic unit for converting chemical energy to electrical energy, usually consisting of electrode, separator, electrolyte, housing, and terminal, and designed to be 

rechargeable. 

Cell Temperature 

The surface temperature of the cell. 

Rated Capacity 

It’s the capacity when cells are discharged to end of voltage with 0.5C at 25±2℃. 

Charge Rate (C-Rate)

The current value that the cell need to discharge its rated capacity in a stated time, 

which equal to a multiple of the rated capacity of the cell on the data value, usually 

expressed with the letter “C”. 

Cycle Life

With the repeated charging and discharging, the cell's capacity will gradually decline. 

Usually when the capacity of the cell reaches 80% of the rated capacity, the number of  charge-discharge cycles is called cycle life. 

Open Circuit Voltage(OCV)

Open-circuit voltage is the difference of electrical potential between two terminals of a device when disconnected from any circuit. 

Operating Voltage

Operating voltage, also known as the discharge voltage or load voltage, it is defined as 

the potential difference between the cell terminals when the current transmits through 

the external circuit. Working voltage is always lower than the open circuit voltage, 

because when the current transmits through the cell internal, the polarization resistance and ohmic resistance must be overcome.

Restore Capacity 

After storage, the capacity tested according to the standard charge and discharge 

conditions listed in section 5.2.1 and 5.3.1, the average value of 3 measured values were selected as restore capacity.

Charge Retention Capability

The percentage of the discharge capacity and rated capacity after the cell stored in a certain time and under normal temperature condition. 

Capacity Recovery  Capability 

The percentage of the discharge capacity and rated capacity with recharging after the cell stored in a certain time and under normal temperature. 

Standard Charging

Charge mode described in section 5.2.1. 

Standard Discharging 

Discharge mode described in section 5.3.1. 

State of Charge (SOC) 

The percentage of remaining energy. Only with estimating the cell SOC accurately can improve the utilization efficiency of the cell, and ensure the cell life and safety. 

Units of Measurement 

“V” (Volt), Unit of voltage 

“A” (Ampere), Unit of current 

“Ah” (Ampere-Hour), Unit of electric charge 

“Wh” (Watt-Hour), Unit of energy 

“mΩ” (MilliOhm), Unit of resistance 

“℃”(degree Celsius), Unit of temperature 

“mm” (millimeter), Unit of length 

“s” (second), Unit of time 

“Hz”(Hertz), Unit of frequency 

A

Thickness

71.53± 0.3mm

预紧力 300±20Kgf

B

Width 

173.8 ± 0. 5 mm

C

Length1

204.0± 0.5 mm

D

Length2 

206.5 ± 0.5 mm

E

Center distance

128 ± 0.5 mm

1

Nominal Capacity 

71.53± 0.3mm

预紧力 300±20Kgf

2

Standard Voltage 

173.8 ± 0. 5 mm

3

Standard Charge 

204.0± 0.5 mm

4

Standard Discharge

206.5 ± 0.5 mm

5

Charging Cut-off Voltage

128 ± 0.5 mm

6

Discharging Cut-off Voltage 

2.0V T≤0

7

Available SOC Range

0~100% 

8

Max Charge Current

280A（0~80%SOC）

9

Max Discharge Current

280A

10

Internal Resistance

＜0.5mΩ

11

Weight 

5350g±300g

12

Energy Density 

≥165Wh/kg, ≥350Wh/L

13

Operating Temperature

Charge： 0℃ ~ 55℃

Discharge：-20℃ ~ 55℃

14

Storage Requirements 

Temperature：-30℃ ~ 60℃

 Humidity：≤75%RH 

1

Standard Charging Model

0.5C

At 25℃±2℃，charged to3.65V at a constant current of 0.5C, and then, changed continuously with constant voltage of 3.65V until the current was not more than 0.05C. 

2

Maximum Pulse Charging 

1.5C

When cell temperature is below 55℃, the maximum charging can last 30s

3

Standard Charging Temperature

25±2℃

Cell Temperature

4

Absolute Charging Temperature

0℃ ~ 55℃

No matter what the charging model is, once the temperature of the cell is above the absolute charging temperature, charging should be stopped. 

5

Absolute Charging Voltage

Maximum 

3.65V

No matter what the charging model is, including pulse charging, once the voltage of the cell is above the absolute charging voltage, charging should be stopped.

Max Charge Current 

0 

0.1C 

0.3C

0.5C 

0.7C 

1C 

0.5C 

0.3C

0.2C 

1

Standard Discharging Model

0.5C

At room temperature, discharged to 2.5V at a constant current of 0.5C 

2

Maximum Pulse Discharging 

2C

When cell temperature is below 55℃, the maximum discharge can 

last 30s

3

Standard Discharging Temperature 

25±2℃

Cell Temperature

4

Absolute Discharging Temperature

-20~55℃

No matter what the discharging model is, once the temperature of 

the cell is above the absolute discharging temperature, discharging 

should be stopped. 

Maximum Charging Current Allowed

0.5C 

1C 

Discharging Voltage Limit

2.0V

2.5V

1 

Cycle Life

At 25℃±2℃, the battery was charged and discharged at a constant power of 0.5P with 300±20Kgf preload, and the time interval of charging and discharging is 30min. Repeat the steps until the capacity fade to 80% of the initial capacity. 

≥6000 Cycles

2

High Temperature Cycle 

At 45℃±2℃, the battery was charged and discharged at a constant power of 0.5P with 300±20Kgf preload, and the time interval of charging and discharging is 30min. Repeat the steps until the capacity fade to 80% of the initial capacity. 

≥3000 Cycles

3

Low Temperature Discharge 

At 25℃±2℃ environment, charged by 0.5C current CC/CV, then at - 20℃±2℃environment, shelved for more than 8 hours, discharged at 0.5C current to 2.0V. 

≥70% Nominal Capacity

4

High Temperature Discharge 

It was charged by 0.5C current CC/CV at 25℃±2℃, then resting at 55℃±2℃ for more than 5 hours, then discharged by 0.5C to 2.5V. 

Nominal Capacity

1

Room Temperature Storage

The 100% SOC cell was shelved for 28 days at 25℃±2℃, and then discharged to 2.5V with 0.5C current, recording 

the discharging time. 

Capacity Retention ≥95%

2

High Temperature Storage

The cell was fully charged at 25℃±2℃, placed in the thermostat at 55℃±2℃ for 7 days. Take out the cell and hold for 5 hours at 25±2℃, discharged to 2.5V with 1C current, recording the discharging time. 

Capacity Retention ≥95%

1

Over Discharge

100%SOC cell was discharged at room temperature for 90 minutes by 1C current. Observe for 1 hour. 

No explosion，no fire，no leakage

2

Over Charge

When the cell was fully charged, charge it with 1/3C current to 1.1 times the prescribed charging termination voltage or 115% SOC to stop charging. Observe for 1 hour. 

No explosion，no fire

3

Short Circuit

When the cell was fully charged, the positive and negative poles are short-circuited for 10 minutes and the external line resistance is less than 5 mΩ. Observe for 1 hour. 

No explosion，no fire

4

Heating

The full cell was placed in the temperature box. The temperature box rises from room temperature to 130℃ at the rate of 5℃/min and maintains for 30 minutes. Observe for 1 

hour

No explosion，no fire

5

Crushing

Fill the cell 0.5C CC/CV with electricity; 

Extrusion Direction: Vertical Core Surface; 

Extrusion speed: 2 mm/s; 

Extrusion degree: until the cell is 0V or the deformation 

reaches 15% or the extrusion force reaches 100KN, stop 

extrusion and observe for 1h. 

No explosion，no fire

6

Temperature Cycle

After standard charging, put the cell in the temperature box，

according to the following five temperature cycle: 

1. Keeping 60 minutes at -40℃, the temperature change rate 13/12℃ / min; 

2. Keeping 90 minutes at -40℃, the temperature change rate 0℃ / min; 

3. Keeping 60 minutes at 25℃, the temperature change rate 13/12℃ / min; 

4. Keeping 90 minutes at 85℃, the temperature change rate 2/3℃ / min; 

5. Keeping 110 minutes at 85℃, the temperature change rate 0℃ / min; 

6. Keeping 70 minutes at 25℃, the temperature change rate 6/7℃ / min, observation of 1h. 

No explosion，no fire，

no leakage