News

Preface

Previously, BatteryTrader.com introduced the Micro Power New Energy 18250-600mAh battery cell, and here we will bring you a comprehensive analysis of the performance of this battery cell from three aspects: charging and discharging performance, internal resistance and temperature.

Appearance

As usual, let's take a look at the appearance and specifications of this battery cell.

Micro Power New Energy 18250-600mAh battery cell overall cylindrical structure, using conventional aluminium-plastic composite film encapsulation, both sides lead to the positive and negative lugs.

Micro Power New Energy 18250-600mAh battery cells are printed on the front side with the relevant parameter words:

"WP 18250 600mAh" and “+” and “-” positive and negative markings.

Typical capacity: 600mAh@0.2C.

Nominal voltage: 3.7V; Nominal energy: 2.22Wh.

AC internal resistance: ≤90mΩ.

The height of the Micro Power New Energy 18250-600mAh cell is about 25.1mm.

The Micro Power New Energy 18250-600mAh cell height diameter is about 17.8mm.

The Micro Power New Energy 18250-600mAh cell weighs about 12.9g.

Comparison of Micro Power New Energy 18250-600mAh battery cell with a dollar coin.

Comparison display of Micro Power New Energy 18250-600mAh battery cells in the hands of an adult.

Charge and Discharge Test

After looking at the appearance, enter the main topic; the following will be 0.2C, 0.5C and 1C multiplier for charging and discharging test.

Charge Test

The charging test will perform constant current and constant voltage charging for 0.2C, 0.5C and 1C multiples and count their total elapsed time.

0.2C charging

Draw a line graph, set the current to 120mA, 0.2C to charge the Micro Power New Energy 18250-600mAh cell, the charging cut-off voltage is 4.25V, and the time taken is 5 hours and 4 minutes.

0.5C charging

Draw a line graph, set the current to 300mA, 0.5C to charge the Micro Power New Energy 18250-600mAh cell, the charging cut-off voltage is 4.25V, and the time taken is 2 hours and 12 minutes.

1C charging

Draw a line graph, set the current to 600mA, 1C for Micro Power New Energy 18250-600mAh cell charging, charging cut-off voltage is 4.25V, time consumed 1 hour 16 minutes.

Plotting the test data as a line graph, the charging test took 5 hours and 4 minutes for a full 0.2C charge, 2 hours and 12 minutes for a full 0.5C charge, and 1 hour and 16 minutes for a full 1C charge.

Discharge testing

The discharge test phase will use constant current discharge, counting its total elapsed time and its discharged capacity and energy values.

0.2C discharge

Draw a line graph, set the current to 120mA, 0.2C for the Micro Power New Energy 18250-600mAh core discharge, average voltage 3.84V, put to the cut-off voltage of 3V, took about 5 hours and 23 minutes, discharged the capacity of 648mAh, discharged energy 2.49Wh.

0.5C discharge

Draw a line graph, set the current to 300mA, 0.5C for Micro Power New Energy 18250-600mAh core discharge, average voltage 3.83V, put to the cut-off voltage of 3V, time consumed about 2 hours and 8 minutes, discharged capacity 640mAh, discharged energy 2.45Wh.

1C discharge

Draw a line graph, set the current to 600mA, 1C for the Micro Power New Energy 18250-600mAh core discharge, average voltage 3.79V, put to the cut-off voltage of 3V, time consumed is about 1 hour and 3 minutes, the discharge capacity of 634mAh, the discharge energy of 2.4Wh.

Summarising the test data into a table, it can be seen that the core is discharged at three multipliers to test the gap, the shortest discharge time is 1C discharge, the discharge time is about 1 hour and 3 minutes. The longest discharge time is 0.2C discharge, and the discharge time is about 5 hours and 23 minutes.

Summarising the test data into a bar chart, it can be seen that the highest discharged energy is 2.49Wh for a 0.2C discharge, and the lowest discharged energy is 2.4Wh for a 1C discharge, both exceeding the nominal energy and performing well.

Let's take a look at the difference in capacity put out by each gear, plotting the data on a curve, we can see that the 0.2C magnification puts out a capacity of 648mAh, the 0.5C magnification puts out a capacity of 640mAh, and the 1C magnification puts out a capacity of 634mAh, and the three gears put out a capacity that exceeds the nominal capacity, which is an excellent performance.

Internal Resistance Test

In the internal resistance test part, BatteryTrade.com will use the internal resistance test instrument to test the full-charge internal resistance and no-charge internal resistance respectively.

Summarising the test data into a table, we can see that the full internal resistance voltage is 4.25V, while the empty internal resistance voltage is 3.0V, and the nominal internal resistance of the new energy 18250-600mAh core is ≤90mΩ.

Plotting a bar graph, we can see that the internal resistance is 40.41mΩ at 4.25V fully charged and 39.44mΩ at 3.0V uncharged, neither of which exceeds the nominal internal resistance.

Temperature testing

For the temperature test section, BatteryTrader.com will measure the temperature after 30 minutes at each charge/discharge multiplier.

Charging Temperature Test

0.2C charging

The Micro Power New Energy 18250-600mAh cell was charged for 30 minutes at 0.2C multiplication rate, and the maximum surface temperature was about 27.3°C.

0.5C charging

The Micro Power New Energy 18250-600mAh cell was charged for 30 minutes at a 0.5C multiplier, and the maximum surface temperature was about 27.5℃.

1C charging

The Micro Power New Energy 18250-600mAh cell was charged at 1C times for 30 minutes, and the maximum surface temperature was about 29.5℃.

Discharge temperature test

0.2C0.2C discharge

Micro Power New Energy 18250-600mAh cells were discharged at 0.2C multiplier for 30 minutes, and the maximum surface temperature was about 27.2℃.

0.5C discharge

Micro Power New Energy 18250-600mAh cells were discharged at 0.5C multiplier for 30 minutes, and the maximum surface temperature was about 27.9℃.

1C discharge

Micro Power New Energy 18250-600mAh cells were discharged for 30 minutes at 1C multiplication rate, and the maximum surface temperature was about 29.1°C.

Battery trading network summary

This Micro Power New Energy 18250-600mAh battery cell, battery trading network were in the 0.2C, 0.5C and 1C three times the rate of testing, charging, 1C times the rate of charging can be completed in 1 hour 16 minutes charging, discharge part, you can see that the 0.2C times the rate of discharge discharge capacity of 648mAh, the discharge energy reached 2.49Wh, excellent performance.

In terms of internal resistance and temperature, the Micro Power New Energy 13350-500mAh core also shows excellent performance. It can be seen that the internal resistance of 4.25V fully charged is 40.41mΩ, and the internal resistance of 3.0V uncharged is 39.44mΩ, neither of which exceeds the nominal internal resistance, and in the 30-minute test of charging and discharging with different multiplication rates, the charging and discharging temperatures are all in the range of 27-29℃ with good overall temperature control.

Overall, Micro Power New Energy 18250-600mAh core is a more balanced product, it can not only meet the needs of daily use, but also in more demanding application scenarios to provide stable performance support. We believe that with the continuous progress of new energy technology, Xiaodian New Energy will continue to lead the development of the industry and bring consumers more high-performance, high-quality battery products.