Foreword
With the continuous evolution of science and technology, the lithium battery industry has also continued to break through industry restrictionsThe 21700mAh battery cell stopped at 5000mAh for a long time, and recently, the charging head network got a 21700mAh battery cell produced by Yintian New Energy, with an astonishing 5500mAh capacity, opened a new round of energy density competition, and became a new favorite in the current market. The introduction of this battery cell not only marks a huge leap forward in lithium-ion battery technology, but also opens up new possibilities for electronics, the automotive industry and energy storage systems.
The launch of this Yintian New Energy INR21700E5500 lithium battery can meet the strong demand for high energy density, long battery life and higher performance. It goes beyond traditional capacity standards and opens up new possibilities for a wide range of industries. And high capacity does not mean that the safety of the shelter, this lithium battery has also undergone strict safety tests to ensure that it can remain stable, reliable and safe in use.
Appearance introduction
Let's take a look at the appearance and specifications of this battery cell first.
Yintian New Energy INR21700E5500 battery cell is a cylindrical design, using the color of blue cell sleeve, and the color of the sleeve film can be adjusted according to the requirements to meet the diverse needs of customers.
Yintian New Energy INR21700E5500 has a cell coding on the side of the sleeve film
SS INR21700E5500 and factory code "and" + "positive and negative pole markings;
Rated capacity: 5500mah@02c；
Nominal voltage: 37v；Nominal energy: 2035wh；
Cycle life: +05c/-0.5c,4.2-2.75v 70%@300；
AC internal resistance: 20 m.
Yintian New Energy INR21700E5500 battery cell is also made of alloy metal, which is durable and anti-corrosion.
The contact surface of the positive electrode of Yintian New Energy INR21700E5500 cell is still made of alloy, and it is connected by three solder joints of the disc.
Yintian New Energy INR21700E5500 battery cell cylindrical height is about 705mm。
The cylindrical diameter of Yintian New Energy's INR21700E5500 battery cell is about 215mm。
The weight of Yintian New Energy's INR21700E5500 battery cell is about 713g。
Charge and discharge test
After looking at the appearance, let's get to the point;The following will be 02c、0.5C and 1C rates for charge and discharge tests.
Charge test
The charge test will be 02c、0.5C and 1C rates are used for constant current and constant voltage charging, and the total time consumption is counted.
0.2C charging
Draw a line chart with a current of 1100mA, 02C is charged for Yintian New Energy INR21700E5500 cells, and the charging cut-off voltage is 42V, it takes about 5 hours and 35 minutes.
0.5C charging
Draw a line chart with a current of 2750mA, 05C is charged for Yintian New Energy INR21700E5500 cells, and the charging cut-off voltage is 42V, it takes about 2 hours and 34 minutes.
1C charging
Draw a line diagram, set the current to 5500mA, 1C is to charge the Yintian New Energy INR21700E5500 battery, and the charging cut-off voltage is 42V, it takes about 1 hour and 40 minutes.
Plot the test data as a line chart, 0. in the charging testIt takes 5 hours and 35 minutes to fully charge 2C, 0It takes 2 hours and 34 minutes to fully charge at 5C, and 1 hour and 40 minutes to charge at 1C.
Discharge test
In the discharge test stage, a constant current discharge will be used to calculate the total time consumed, as well as the discharge capacity and energy values.
0.2C discharge
Draw a line chart with a current of 1100mA, 02C is the discharge of Yintian New Energy's INR21700E5500 cells, with an average voltage of 354V, put to the cut-off voltage of 25V, it takes about 5 hours and 17 minutes, the output capacity is 5817mAh, and the energy is 2059wh。
0.5C discharge
Draw a line chart with a current of 2750mA, 05C is the discharge of Yintian New Energy's INR21700E5500 cells, with an average voltage of 349V, put to the cut-off voltage of 25V, it takes about 2 hours and 4 minutes, the release capacity is 5703mAh, and the energy is 1993wh。
1C discharge
Draw a line diagram, set the current to 5500mA, 1C is the discharge of Yintian New Energy INR21700E5500 cells, and the average voltage is 343V, put to the cut-off voltage of 25V, it takes about 1 hour and 02 minutes, the release capacity is 5717mAh, and the energy is 1959wh。
Summarizing the test data into **, it can be seen that the cell is discharged at three magnifications, and the shortest discharge time is 1C discharge, and the discharge time is about 1 hour and 2 minutes. The longest discharge time is 02C discharge, discharge time is about 5 hours and 17 minutes.
The test data is summarized into a histogram, and the overall discharge energy in the discharge test is 1959-20.59wh;The overall gap is not large, and the highest discharge energy is 02C discharge gear, discharge energy up to 2059wh；The lowest discharge energy is the 1C discharge gear with a discharge energy of 1959wh。
Let's take a look at the difference in the capacity of each gear, and plot the data as a graph, and you can see 0The discharge capacity of the 2C discharge gear is 5817mAh, and the lowest discharge capacity is 0The discharge capacity of the 5C discharge gear is 5703mAh.
Internal resistance test
In the internal resistance test part, the charging head network will use the internal resistance test instrument to test the full power internal resistance and empty power internal resistance respectively.
Summing up the test data to **, you can see that the fully charged internal resistance voltage is 42V, the air-electric internal resistance voltage is 25V, Yintian New Energy INR21700E5500 battery cell nominal internal resistance is 20M.
Draw out the histogram and you can see 4The internal resistance of 2V is 15 when fully charged27mω，2.The internal resistance of 5V air power is 1454m, none of which exceeded the nominal internal resistance, and the difference between the two sets of data was small;Outstanding performance.
Temperature test
In the temperature test part, the charging head network will measure the temperature of each charge and discharge rate after 30 minutes.
Charging temperature test
0.2C charging
The Yintian New Energy INR21700E5500 battery cell is 0Charge at 2C rate for 30 minutes, and the maximum surface temperature is 288 or so.
0.5C charging
The Yintian New Energy INR21700E5500 battery cell is 0Charge at 5C rate for 30 minutes, and the maximum surface temperature is 306 or so.
1C charging
The Yintian New Energy INR21700E5500 battery cell was charged at a rate of 1C for 30 minutes, and the maximum surface temperature was 369 or so.
Discharge temperature test
0.2C discharge
The Yintian New Energy INR21700E5500 battery cell is 0Discharge at 2C rate for 30 minutes, and the maximum surface temperature is 277 or so.
0.5C discharge
The Yintian New Energy INR21700E5500 battery cell is 0The discharge was carried out at a rate of 5C for 30 minutes, and the maximum surface temperature was 294 or so.
1C discharge
The Yintian New Energy INR21700E5500 battery cell was discharged at a rate of 1C for 30 minutes, and the maximum surface temperature was 376 or so.
Summary of the charging head network
This Yintian new energy INR21700E5500 battery cell, the charging head network is 02c、0.5C and 1C three rates of the test, charging, 1C rate charging can be completed in 1 hour and 40 minutes, the discharge part, you can see 0The 2C rate discharge capacity is 5817mAh, and the discharge energy reaches 2059wh, which exceeds the nominal capacity and energy, and the performance is amazing.
Internal Resistance and Temperature Performance, 4The internal resistance of 2V is 15 when fully charged27mω，2.The internal resistance of 5V air power is 1454m, none of which exceeded the nominal internal resistance, and the difference between the two sets of data was small;In terms of temperature, the temperature was tested after 30 minutes of charging and discharging at three different rates, and the charging temperature was in the range of 28-36The discharge temperature is in the range of 27-37, the overall temperature rise is low, and it is normal for the temperature to be high during discharge.
Yintian New Energy INR21700E5500 battery cell with its excellent performance and stable performance, let us shine. In terms of charging and discharging, it exceeded expectations, especially by 0The capacity and energy obtained by the 2C rate discharge exceed the nominal data, providing the user with more energy reserves. Stable internal resistance and good temperature control have brought a new benchmark for the battery field, and also broke through the limit of 21700 battery capacity stopped at 5000mAh, in general, this battery cell has performed well in a number of tests, showing the potential to become the preferred power source in the field of portable equipment and energy storage, providing a solid foundation for a wide range of applications, and is a battery product worth looking forward to.