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Power Persistence at -40°C: An Analysis of MOLICEL Ultra-Low Temperature 21700 Battery Cells
Views: 2 Author: Site Editor Publish Time: 2024-09-29 Origin: Site
Preface
In the journey of exploring the limits of energy, the challenge of ultra-low temperature environments to battery performance has always been a difficult problem in the scientific and technological community. Imagine that in areas covered with ice and snow for thousands of miles, ordinary batteries have long lost their vitality under the oppression of low temperatures. However, under such extreme conditions, a special battery cell can remain strong and continue to provide a continuous stream of power for equipment. This is the ultra-low temperature battery cell. With its extraordinary low-temperature resistance characteristics, it has opened a new chapter in the application of electronic equipment in extreme environments. Let's discuss the 21700 battery cell that can discharge normally at minus 40 degrees Celsius.
Inventory of ultra-low temperature 21700 battery cells Here are the ultra-low temperature 21700 battery cells. Our standard is that the specification sheet or official website clearly indicates that the battery cell can discharge at -40°C and the discharge capacity is greater than 50% of the nominal capacity. Based on this standard, we only found one brand and two types of battery cells. The following are the details:
Brand
Model
Voltage
Max. charge
Max. discharge
Internal resistance
Capacity
Cycle life
Molicel
INR21700 P42A
3.6V
4.2A
45A
10mΩ
4200mAh
500
Molicel
INR21700 P45B
3.6V
9A
45A
8mΩ
4500mAh
500
Now let's introduce these two types of battery cells in detail. There is no order of precedence. They are introduced in alphabetical order of enterprise English names: MOLICEL
INR-21700-P45B INR-21700-P45B is a high-rate power lithium-ion battery cell suitable for consumer electronics, mobile energy storage, and power tools. It adopts nickel-manganese-lithium (INR) chemical composition. See the following for details:
The INR-21700-P45B battery cell is designed in a cylindrical shape and uses a grayish-white battery cell sleeve film color. On one side of the battery cell, there is a marking:
"INR-21700-P45B (model), MOLICEL (brand name), 3NA2601 (factory code), and '+,-' positive and negative electrode markings."
The INR-21700-P45B has a nominal voltage of 3.6V, a standard capacity of 4500mAh, a charging cut-off voltage of 4.2V, a discharge cut-off voltage of 2.5V, a maximum charging current of 9A (2C), a maximum discharge current of 45A (10C). The internal resistance is ≤8mΩ, the weight is 70g, the operating temperature is -40~80°C, and the cycle life reaches 500 times.
INR-21700-P42A INR-21700-P42A is a high-rate power lithium-ion battery cell suitable for consumer electronics, mobile energy storage, and power tools. It adopts nickel-manganese-lithium (INR) chemical composition. See the following for details: The INR-21700-P42A battery cell is designed in a cylindrical shape and uses a grayish-white battery cell sleeve film color. On one side of the battery cell, there is a marking: "INR-21700-P45B (model), MOLICEL (brand name), 092 20319 01 (factory code), and '+,-' positive and negative electrode markings."
The INR-21700-P42A has a nominal voltage of 3.6V, a standard capacity of 4200mAh, a charging cut-off voltage of 4.2V, a discharge cut-off voltage of 2.5V, a maximum charging current of 4.2A (1C), a maximum discharge current of 45A (10C). The internal resistance is ≤10mΩ, the weight is 70g, the operating temperature is -40~60°C, and the cycle life reaches 500 times.
Summary
There are only two types of Molicel's ultra-low temperature 21700 battery cells. On the one hand, it shows that it is technically difficult for 21700 to maintain discharge capacity at -40°C. MOLICEL is top-notch in this regard.
The INR-21700-P45B has a nominal voltage of 3.6V, a standard capacity of 4500mAh, a charging cut-off voltage of 4.2V, a discharge cut-off voltage of 2.5V, a maximum charging current of 9A (2C), a maximum discharge current of 45A (10C). The internal resistance is ≤8mΩ, the weight is 70g, the operating temperature is -40~80°C, and the cycle life reaches 500 times.
The INR-21700-P42A battery cell is designed in a cylindrical shape and uses a grayish-white battery cell sleeve film color. On one side of the battery cell, there is a marking:
The INR-21700-P42A has a nominal voltage of 3.6V, a standard capacity of 4200mAh, a charging cut-off voltage of 4.2V, a discharge cut-off voltage of 2.5V, a maximum charging current of 4.2A (1C), a maximum discharge current of 45A (10C). The internal resistance is ≤10mΩ, the weight is 70g, the operating temperature is -40~60°C, and the cycle life reaches 500 times.
