Molicel INR21700-M50A

The Batemo Cell of the lithium-ion battery cell Molicel INR21700-M50A is a high-precision, physical battery model with global validity. As a digital twin it seamlessly integrates into your research, development and battery analytics by basing your decisions on simulations.

Cell Origin purchased on free market
Cell Format 21700
Dimen­sions 21.3 x 70.2 mm
Weight 66.7 g
Capacity
[defin­i­tion]
The nominal capacity origi­nates from the manufac­tur­er’s data sheet, if avail­able. When the data sheet is unavail­able, the nominal capacity is estimated. Batemo measured the C/10 capacity by discharging the cell at an ambient temper­a­ture of 25°C from 100% with a constant current of 0.50A (0.1C) until reaching the voltage of 2.5V. The thermal boundary condi­tion is free convection.
nominal 5.00 Ah
C/10 4.78 Ah
Current
[defin­i­tion]
All quanti­ties are measure­ment results of the Batemo battery labora­tory. The contin­uous current is the highest current that completely discharges the cell without over-heating it. Therefor, the cell is discharged from 100% state of charge at an ambient temper­a­ture of 25°C with a constant current until reaching a residual state of charge of 10% and either the voltage of 2.5V or 90% of the maximum surface temper­a­ture of 63°C. The peak current is the current the cell can deliver for 5 minutes. Conse­quently, the cell is discharged from 100% SOC at an ambient temper­a­ture of 25°C with a constant current until reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C after 5 minutes. The thermal boundary condi­tion is free convec­tion. These opera­tional condi­tions might be outside the speci­fi­ca­tion of the cell manufacturer.
contin­uous 9.9 A
peak 20.2 A
Energy
[defin­i­tion]
Batemo measured the C/10 energy by discharging the cell at an ambient temper­a­ture of 25°C from 100% with a constant current of 0.50A (0.1C) until reaching the voltage of 2.5V. The thermal boundary condi­tion is free convection.
C/10 17.4 Wh
Power
[defin­i­tion]
All quanti­ties are measure­ment results of the Batemo battery labora­tory. The mean contin­uous power is the highest power that completely discharges the cell without over-heating it. There­fore, the cell is discharged from 100% state of charge at an ambient temper­a­ture of 25°C with a constant current until reaching a residual state of charge of 10% and either the voltage of 2.5V or 90% of the maximum surface temper­a­ture of 63°C. The peak power is the power the cell can deliver for 5 minutes. Conse­quently, the cell is discharged from 100% SOC at an ambient temper­a­ture of 25°C with a constant current until reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C after 5 minutes. The thermal boundary condi­tion is free convec­tion. These opera­tional condi­tions might be outside the speci­fi­ca­tion of the cell manufacturer.
contin­uous 33.5 W
peak 69.3 W
Energy Density
[defin­i­tion]
The energy densi­ties result from the C/10 energy, the cell weight and the cell volume.
gravi­metric 261 Wh/kg
volumetric 696 Wh/l
Power Density
[defin­i­tion]
The power densi­ties result from the peak power, the cell weight and the cell volume.
gravi­metric 1.04 kW/kg
volumetric 2.77 kW/l

Batemo Cell

The Batemo Cell of the lithium-ion battery cell Molicel INR21700-M50A is a high-preci­sion, physical cell model with global validity. As a digital twin it seamlessly integrates into your research, devel­op­ment and battery analytics by basing your decisions on simula­tions. See the details to learn more about the features and capabil­i­ties of the Batemo Cell.

Batemo Cell Version 1.309
Release Date October 01, 2022

Batemo demon­strates the accuracy and validity of the Batemo cell by comparing battery simula­tion and measure­ment data in the range given below. Valida­tion is exten­sive, exper­i­mental charac­ter­i­za­tion covers 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.

State of Charge Range 0 … 100%
Current Range
[defin­i­tion]

The current range are the electrical current limits as used in the Batemo battery labora­tory. Please see the Molicel INR21700-M50A data sheet for the precise defin­i­tion of the current safe area of opera­tion of the cell.
-23 A discharge … 10 A charge (-5.0C … 2.0C)
Voltage Range
[defin­i­tion]

The voltage range are the electrical voltage limits as used in the Batemo battery labora­tory. Please see the Molicel INR21700-M50A 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 Molicel INR21700-M50A data sheet for the precise defin­i­tion of the temper­a­ture safe area of opera­tion of the cell.
-20 … 70 °C

Moreover, the Batemo Cell valida­tion is fully trans­parent. The Batemo Cell Data contains the raw measure­ment and simula­tion data. For all exper­i­ments the voltage, temper­a­ture, power and energy accura­cies are calcu­lated. This allows straight-forward evalu­a­tion and analysis of the Batemo Cell validity. The graphs show a selec­tion of charac­ter­istic data of the cell Molicel INR21700-M50A to evaluate the cell performance.

Discharge Charac­ter­is­tics

Molicel_INR21700M50A_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

Molicel_INR21700M50A_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 stops when reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C.
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 stops when reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C. 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 stops when reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C. The graph shows the derived exchanged energy and average power of the experiment.
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 stops when reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C. The graph shows the derived exper­i­ment duration and average power of the experiment.
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 stops when reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C. The graph shows the cell surface temper­a­ture at the end and the derived average power of the experiment.

Energy Charac­ter­is­tics

How much energy can it deliver?

Molicel_INR21700M50A_energy

Power Charac­ter­is­tics

How long can it deliver the power?

Molicel_INR21700M50A_power

Thermal Charac­ter­is­tics

How hot does it get?

Molicel_INR21700M50A_thermal

The mean accura­cies give an overview of the Batemo Cell accuracy. 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 0.022 V 0.7 %
Mean Temper­a­ture Accuracy 0.7 K 0.7 %
Mean Power Accuracy 0.11 W 0.6 %
Mean Energy Accuracy 0.220 Wh 2.1 %

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

Batemo Cell Data

Batemo offers an exten­sive, exper­i­mental charac­ter­i­za­tion of the lithium-ion battery cell Molicel INR21700-M50A. The data contains measure­ment results in the total opera­tional area of the cell. The descrip­tions and graphs below explain and show the avail­able measure­ments. The Batemo Cell Viewer allows easy and fast analysis, evalu­a­tion and compar­ison of the data. See the details to learn more.

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 stops when reaching either the voltage of 2.5V or 4.2V or the surface temper­a­ture of 70°C. The graph shows for which ambient temper­a­tures and charging and discharging constant currents measure­ments are available.

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 stops when reaching either the voltage of 2.5V or 4.2V or the surface temper­a­ture of 70°C. The graph shows for which ambient temper­a­tures and pulse currents measure­ments are available.

Power Profiles

The cell delivers a typical power profile from 100% SOC at different ambient temper­a­tures. The thermal boundary condi­tion is free convec­tion. The measure­ment stops when reaching either the voltage of 2.5V or the surface temper­a­ture of 70°C. The table summa­rizes for which ambient temper­a­tures the profile is available.

Molicel_INR21700M50A_validation_const
Molicel_INR21700M50A_validation_pulse
Ambient Temper­a­ture Avail­able
-20 °C profile_check
0 °C profile_check
25 °C profile_check
40 °C profile_check