Foreword
Previously, the charging head network introduced the Shentong 552125 soft-pack battery cell produced by Shentong World Technology, this time, the charging head network will bring you a detailed evaluation of this cell, from the charge and discharge, internal resistance and temperature three major parts of the test for you to analyze the performance of this cell in detail.
Appearance introduction
Without further ado, let's take a look at the appearance of this battery cell first.
The whole pouch cell of the Shentong 552125 is a square structure, which is encapsulated with aluminum-plastic film, and the positive and negative sides are led out through the wires.
The front 552125 the pouch cell of the magic power is printed with the relevant parameter number:
Model: ST 552125 and "+" positive and negative pole markings;
Typical capacity: 350mah@02c；
Nominal voltage: 38v；Nominal energy: 133wh；
Internal resistance: 250m.
The length of the pouch cell 552125 Shentong is about 251mm。
The width of the pouch cell 552125 Shentong is about 205mm。
The thickness of the pouch cell 552125 Shentong is about 54mm。
The weight of the pouch battery cell 552125 MiTAC is about 57g。
The 552125 pouch battery cells are relatively small in the hands of adults.
Charge and discharge test
After reading 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 and set the current to 70mA, 02C is the charging of the 552125 pouch battery cell of MiTA, and the charging cut-off voltage is 435V, it takes about 5 hours and 12 minutes.
0.5C charging
Draw a line chart and set the current to 175mA, 05C is the charging of the pouch battery cells of the MiTAC 552125, and the charging cut-off voltage is 435V, it takes about 2 hours and 17 minutes.
1C charging
Draw a line chart, set the current to 350mA, 1C to charge the pouch cells of the Shentong 552125, and the charging cut-off voltage is 435V, it takes about 1 hour and 23 minutes.
Plot the test data as a line chart, 0. in the charging testIt takes 5 hours and 12 minutes to charge 2C to fully charge, 0It takes 2 hours and 17 minutes to fully charge at 5C, and 1 hour and 23 minutes to charge with 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 and set the current to 70mA, 02C is the discharge of the pouch cell of the Shentong 552125, and the average voltage is 385V, put to the cut-off voltage of 3V, it takes about 5 hours and 09 minutes, the discharge capacity is 361mAh, and the discharge energy is 139wh。
0.5C discharge
Draw a line chart and set the current to 175mA, 05C is the discharge of the pouch cell 552125 Shentong, and the average voltage is 378V, put to the cut-off voltage of 3V, it takes about 2 hours and 03 minutes, the discharge capacity is 360mAh, and the energy is 136wh。
1C discharge
Draw a line diagram, set the current to 350mA, 1C is the discharge of the pouch cell of the Shentong 552125, and the average voltage is 378V, put to the cut-off voltage of 3V, it takes about 1 hour, the discharge capacity is 353mAh, and the discharge energy is 13wh。
Summarizing the test data into **, it can be seen that the battery cell is discharged at three magnifications, the shortest discharge time is 1C discharge, and the discharge time is about 1 hour. The longest discharge time is 02C discharge, discharge time is about 5 hours 09 minutes.
The test data is summarized into a histogram, and the overall discharge energy in the discharge test is 13-1.between 39wh; The overall gap is not large, and the highest discharge energy is 02C discharge gear, discharge energy up to 139Wh, exceeding nominal energy; The lowest discharge energy is the 1c discharge level, and the discharge energy is 13wh。
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 361mAh, and the lowest discharge capacity is the discharge capacity of the 1C discharge gear is 353mAh.
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 435V, the air internal resistance voltage is 30V, the nominal internal resistance of the pouch cell of the Shentong 552125 is 250M.
Draw out the histogram and you can see 4The internal resistance of 35V is 168 when fully charged9mω，3.0V air electric internal resistance 1694m, none of which exceeded the nominal internal resistance, and the internal resistance did not change much in different voltage states.
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 magic power 552125 the pouch battery cell with 0Charge at 2C rate for 30 minutes, and the maximum surface temperature is 263 or so.
0.5C charging
The magic power 552125 the pouch battery cell with 0Charge at 5C rate for 30 minutes, and the maximum surface temperature is 269 or so.
1C charging
The Shentong 552125 pouch battery cells are charged at a rate of 1C for 30 minutes, and the maximum surface temperature is 289 or so.
Discharge temperature test
0.2C discharge
The magic power 552125 the pouch battery cell with 0The discharge was carried out at a rate of 2C for 30 minutes, and the maximum surface temperature was 266 or so.
0.5C discharge
The magic power 552125 the pouch battery cell with 0Discharge at 5C rate for 30 minutes, and the maximum surface temperature is 271 or so.
1C discharge
The pouch cells of the Shentong 552125 were discharged at a rate of 1C for 30 minutes, and the maximum surface temperature was about 31.
Summary of the charging head network
This magic power 552125 soft-pack cells, and the charging head net is 02c、0.5C and 1C three magnification test, charging, 1C rate charging can be completed in 1 hour and 23 minutes, discharge part, you can see 0The 2C rate discharge capacity is 361mAh, and the discharge energy reaches 139wh, both exceeding the nominal data and performing excellently.
Internal resistance and temperature performance, you can see 4The internal resistance of 35V is 168 when fully charged9mω，3.0V air electric internal resistance 1694m, none of which exceeded the nominal internal resistance; In terms of temperature, the temperature was tested after 30 minutes of charging and discharging at three different rates, the charging temperature was in the range of 26-29, and the discharge temperature was in the range of 26-31, the temperature rise did not change much, and the discharge temperature was slightly higher as normal.
Overall, the cell performs well in terms of charging, discharging, and temperature control. Its high capacity, excellent internal resistance performance, and stable temperature control provide a wide range of application prospects in smart wearables, mobile devices, and other fields. The flexibility and high energy density of pouch cells make them an important place in modern portable devices. The outstanding performance of MiTAC 552125 pouch cells provides consumers with reliable and long-lasting power support, and also demonstrates the professionalism and innovation ability of MiTAC Tianxia Technology Co., Ltd. in the field of lithium batteries. The cell's outstanding performance and versatility will further advance the development of portable electronics and meet users' needs for long-lasting battery life and reliable performance.