NCR18650-GA

Cell Ori­gin pur­chased on free mar­ket
Cell For­mat 18650
Dimen­sions 18 x 65 mm
Weight 46.9 g
Volt­age Range
[def­i­n­i­tion]
The volt­age range are the elec­tri­cal lim­its as used in the Bate­mo bat­tery lab­o­ra­to­ry. Please see the Sanyo NCR18650-GA data sheet for the pre­cise def­i­n­i­tion of the volt­age safe area of oper­a­tion of the cell.
2.5 … 4.2 V
Tem­per­a­ture Range
[def­i­n­i­tion]
The tem­per­a­ture range are the ther­mal lim­its as used in the Bate­mo bat­tery lab­o­ra­to­ry. Please see the Sanyo NCR18650-GA data sheet for the pre­cise def­i­n­i­tion of the tem­per­a­ture safe area of oper­a­tion of the cell.
-20 … 60 °C
Cur­rent
[def­i­n­i­tion]
All quan­ti­ties mea­sured in the Bate­mo bat­tery lab­o­ra­to­ry. The cell cur­rent is defined to be the cur­rent the cell can deliv­er for 5 min­utes. There­fore the cell is dis­charged from 100% SOC at an ambi­ent tem­per­a­ture of 25°C with a con­stant cur­rent until either the volt­age of 2.5V or the sur­face tem­per­a­ture of 60°C is reached after 5 min­utes. The ther­mal bound­ary con­di­tion is free con­vec­tion. This oper­a­tion of the cell might be out­side the spec­i­fi­ca­tion of the cell man­u­fac­tur­er.
12.84 A
Pow­er
[def­i­n­i­tion]
All quan­ti­ties mea­sured in the Bate­mo bat­tery lab­o­ra­to­ry. The cell pow­er is defined to be the pow­er the cell can deliv­er for 5 min­utes. There­fore the cell is dis­charged from 100% SOC at an ambi­ent tem­per­a­ture of 25°C with a con­stant cur­rent until either the volt­age of 2.5V or the sur­face tem­per­a­ture of 60°C is reached after 5 min­utes. The ther­mal bound­ary con­di­tion is free con­vec­tion. This oper­a­tion of the cell might be out­side the spec­i­fi­ca­tion of the cell man­u­fac­tur­er.
44.2 W
Capac­i­ty
[def­i­n­i­tion]
All quan­ti­ties mea­sured in the bat­tery lab­o­ra­to­ry of Bate­mo GmbH. The capac­i­ty is mea­sured by dis­charg­ing the cell at an ambi­ent tem­per­a­ture of 25°C from 100% with a con­stant cur­rent of 1.75A (0.5C) until the volt­age of 2.5V is reached. The ther­mal bound­ary con­di­tion is free con­vec­tion.
nom­i­nal 3.50 Ah
coulom­bic 3.20 Ah
ener­getic 11.5 Wh
Ener­gy Den­si­ty
[def­i­n­i­tion]
All quan­ti­ties mea­sured in the bat­tery lab­o­ra­to­ry of Bate­mo GmbH. The capac­i­ty is mea­sured by dis­charg­ing the cell at an ambi­ent tem­per­a­ture of 25°C from 100% with a con­stant cur­rent of 1.75A (0.5C) until the volt­age of 2.5V is reached. The ther­mal bound­ary con­di­tion is free con­vec­tion.
gravi­met­ric 244 Wh/kg
vol­u­met­ric 693 Wh/l
Pow­er Den­si­ty
[def­i­n­i­tion]
All quan­ti­ties mea­sured in the Bate­mo bat­tery lab­o­ra­to­ry. The cell pow­er is defined to be the pow­er the cell can deliv­er for 5 min­utes. There­fore the cell is dis­charged from 100% SOC at an ambi­ent tem­per­a­ture of 25°C with a con­stant cur­rent until either the volt­age of 2.5V or the sur­face tem­per­a­ture of 60°C is reached after 5 min­utes. The ther­mal bound­ary con­di­tion is free con­vec­tion. This oper­a­tion of the cell might be out­side the spec­i­fi­ca­tion of the cell man­u­fac­tur­er.
gravi­met­ric 943 W/kg
vol­u­met­ric 2.67 kW/l

Batemo Cell Validation

The Batemo Cell of the lithium-ion battery cell Sanyo NCR18650-GA is a high-precision, physical cell model with global validity. As a digital twin it seemlessly integrates into your research, development and battery analytics by basing your decisions on simulations. The accuracy and validity of the Batemo Cell is demonstrated. Validation of the Batemo Cell is extensive, measurements are performed in the total operational area of the cell: At low and high temperatures, up to the maximal current and in the whole state of charge range.

Current Range -14 A discharge ... 4 A charge (-4.0C ... 1.0C)
Temperature Range -21 ... 60 °C
Voltage Range 2.5 ... 4.2 V
State of Charge Range 0 ... 100%

Moreover, the Batemo Cell validation is fully transparent. The raw measurement and simulation data of all experiments is supplied, and voltage, temperature, power and energy accuracies are calculated. This allows straight-forward evaluation and analysis of the Batemo Cell validity. The following experiments are included.

Constant Currents

The cell is discharged from 100% SOC or charged from 0% SOC with different constant currents at different ambient temperatures. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or 4.2V or the surface temperature of 60°C is reached. The graph shows for which ambient temperatures and charging and discharging constant currents the measurement is performed.

Pulse Currents

The cell is discharged from 100% SOC or charged from 0% SOC with current pulses followed by no-load phases at different ambient temperatures. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or 4.2V or the surface temperature of 60°C is reached. The graph shows the ambient temperatures and pulse currents the measurement is performed for.

Power Profiles

The cell is loaded with a typical power profile from 100% SOC at different ambient temperatures. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or the surface temperature of 60°C is reached. The table summarizes for which ambient temperatures the profile is measured.

Sanyo_NCR18650GA_validation_const
Sanyo_NCR18650GA_validation_pulse
Ambient Temperature Available
-20 °C
0 °C
25 °C
40 °C

Batemo Cell Accuracy

The graphs show a selection of characteristic data of the cell Sanyo NCR18650-GA to evaluate the cell performance and the Batemo Cell accuracy.

Discharge Characteristics

Sanyo_NCR18650GA_const

  • Discharge Characteristics: The electrical and thermal discharge behavior is strongly nonlinear.
  • Pulse Characteristics: The shape of different current pulses changes strongly.
  • Energy Characteristics: The graph visualizes how much energy the cell can deliver when operated at different powers.
  • Power Characteristics: The more power the cell supplies, the shorter it can deliver the power.
  • Thermal Characteristics: The thermal losses heat up the cell the more, the higher the depleted power is.

Pulse Characteristics

Sanyo_NCR18650GA_pulse

[show experiment definitions]

Discharge Characteristics
The cell is discharged from 100% SOC with different constant currents at different ambient temperatures. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or the surface temperature of 60°C is reached.
Pulse Characteristics
The cell is discharged from 100% SOC with current pulses followed by no-load phases at different ambient temperatures. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or the surface temperature of 60°C is reached. The graph shows a zoomed view of the measurement to visualize one of the pulses.
Energy Characteristics
The cell is discharged from 100% SOC with different constant currents at 25°C. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or the surface temperature of 60°C is reached. The exchanged energy and the average power of the experiment is derived and shown in the graph.
Power Characteristics
The cell is discharged from 100% SOC with different constant currents at 25°C. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or the surface temperature of 60°C is reached. The experiment duration and the average power of the experiment is derived and shown in the graph.
Thermal Characteristics
The cell is discharged from 100% SOC with different constant currents at 25°C. The thermal boundary condition is free convection. The measurement is finished when either the voltage of 2.5V or the surface temperature of 60°C is reached. The cell surface temperature at the end and the average power of the experiment is derived and shown in the graph.

Energy Characteristics

How much energy can it deliver?

Sanyo_NCR18650GA_energy

Power Characteristics

How long can it deliver the power?

Sanyo_NCR18650GA_power

Thermal Characteristics

How hot does it get?

Sanyo_NCR18650GA_thermal

To give an overview of the Batemo Cell accuracy, the mean accuracies are calculated. Therefore, the root mean square of the difference between the measurement and simulation result is derived for the voltage, the temperature, the energy and the power. Relative numbers relate the accuracy to the respective absolute value.

Mean Voltage Accuracy 0.028 V 0.9 %
Mean Temperature Accuracy 0.7 K 0.9 %
Mean Power Accuracy 0.11 W 0.8 %
Mean Energy Accuracy 0.140 Wh 2.2 %

The Batemo Cell precisely describes all aspects of the cell. It is the perfect tool for battery system development.

Implementations

The Batemo Cell is available for various simulation tools.

MathWorks® MATLAB Simulink®
MathWorks® MATLAB Simscape™
FMU (see a list of supported simulation tools)
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