Foreword
Previously, the charging head network introduced the ICR14500 battery cell produced by Zhangzhou Wanbao Energy Technology Co., Ltd., I believe that everyone has an understanding of the appearance and specifications of this cell, and then the charging head network will conduct an in-depth evaluation of it, 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.
Wanbao Energy 14500 battery cells are cylindrical in design and use green cell sleeve color.
The front of Wanbao Energy 14500 battery cell is the battery cell code:
ICR14500C1 and factory coded"
Rated capacity: 800mah@02c；
The charge-discharge cut-off voltage is 42v/3.0v；
Nominal voltage: 37v；Nominal energy: 296wh；
AC internal resistance: 60m.
The contact surface of the anode of Wanbao Energy 14500 battery cell is made of alloy metal and treated by anodizing process, which is durable and anti-corrosion.
The contact surface of the positive electrode of Wanbao Energy 14500 cell is still made of alloy, and the disc uses three grab caps.
Measured using plastic calipers, the cylindrical height of Wanbao Energy 14500 battery cell is about 488mm。
Using plastic calipers, the diameter of the cylinder of Wanbao Energy 14500 battery cell is about 14mm.
Wanbao Energy's 14,500 battery cells are relatively small in the hands of adult men.
The weight of Wanbao Energy's 14500 battery cell is about 204g。
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 160mA, 02c is to charge Wanbao Energy 14500 cells, and the charging cut-off voltage is 42V, 5 hours and 35 minutes.
0.5C charging
Draw a line chart and set the current to 400mA, 05C is to charge Wanbao Energy 14500 cells, and the charging cut-off voltage is 42V, 2 hours and 29 minutes.
1C charging
Draw a line chart, set the current to 800mA, 1C to charge Wanbao Energy 14500 cells, and the charging cut-off voltage is 42V, 1 hour and 29 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 28 minutes to fully charge at 5C, and 1 hour and 29 minutes to charge at 1C.
Discharge test
0.2C discharge
Draw a line chart and set the current to 160mA, 02c is the discharge of Wanbao Energy's 14500 cells, with an average voltage of 371V, put to the cut-off voltage of 30V, it took about 5 hours and 21 minutes, the release capacity was 858mAh, and the energy was 318wh。
0.5C discharge
Draw a line chart and set the current to 400mA, 05C is the discharge of Wanbao Energy's 14500 cells, and the average voltage is 368V, put to the cut-off voltage of 30V, it takes about 2 hours and 08 minutes, the release capacity is 854mAh, and the energy is 314wh。
1C discharge
Draw a line chart, set the current to 800mA, 1C is the discharge of Wanbao Energy's 14500 cells, and the average voltage is 363V, put to the cut-off voltage of 30V, it takes about 1 hour and 03 minutes, the discharge capacity is 844mAh, and the energy is 306wh。
5C discharge
Draw a line chart, set the current to 4000mA, 5C is the discharge of Wanbao Energy's 14500 cells, and the average voltage is 339V, put to the cut-off voltage of 30V, it takes about 11 minutes, the capacity is 756mAh, and the energy is 256wh。
Summarizing the test data into **, it can be seen that the battery cell is discharged at four magnifications, and the shortest discharge time is 5C discharge, and the discharge time is about 11 minutes. The longest discharge time is 02C discharge, the discharge time is about 5 hours and 21 minutes.
The test data is summarized into a histogram, and the overall discharge energy in the discharge test is 256-3.between 18wh; Among them, the highest discharge energy is 02C discharge gear, discharge energy up to 318wh；The lowest discharge energy is the 5C discharge gear with a discharge energy of 256wh。
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 858mAh, and the lowest discharge capacity is 756mAh in the 5C discharge gear.
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 30V, the nominal internal resistance of Wanbao Energy 14500 battery cell is 60M.
Draw out the histogram and you can see 4The internal resistance of 2V is 46 when fully charged3mω，3.The internal resistance of 0V air power is 434m, none of which exceeded the nominal internal resistance, and the difference between the internal resistance in the full power and empty power state was small, and the performance was excellent.
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 Wanbao Energy 14500 battery cell is 02C rate for 30 minutes, the maximum surface temperature is 257 or so.
0.5C charging
The Wanbao Energy 14500 battery cell is 0Charge at 5C rate for 30 minutes, and the maximum surface temperature is 271 or so.
1C charging
Charge the Wanbao Energy 14500 battery cells at a rate of 1C for 30 minutes, and the maximum surface temperature is about 28.
Discharge temperature test
0.2C discharge
The Wanbao Energy 14500 battery cell is 0Discharge at 2C rate for 30 minutes, and the maximum surface temperature is 253 or so.
0.5C discharge
The Wanbao Energy 14500 battery cell is 0Discharge at 5C rate for 30 minutes, and the maximum surface temperature is 266 or so.
1C discharge
The Wanbao Energy 14500 battery cell was discharged at a rate of 1C for 30 minutes, and the maximum surface temperature was 285 or so.
5C discharge
The Wanbao Energy 14500 battery cells were discharged at a rate of 5C for 10 minutes, and the maximum surface temperature was 453 or so.
Summary of the charging head network
This Wanbao Energy 14500 battery cell, the charging head network is 02c、0.5C and 1C three magnification test, charging, 1C rate charging can be completed in 1 hour and 29 minutes, discharge part, you can see 0The 2C rate discharge capacity is 858mAh, and the discharge energy reaches 318Wh, all of which exceeded the nominal data, performed excellently, and the discharge was completed in 11 minutes in terms of 5C rate discharge, with a discharge capacity of 756mAh and an energy of 256wh。
Internal resistance and temperature performance, you can see 4The internal resistance of 2V is 46 when fully charged3mω，3.The internal resistance of 0V air power is 434m, 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 sets of different rates, due to the limitation of the capacity of the small cell, the current was small, and the overall temperature of charging and discharging was in the range of 27-28, and the temperature rise did not change much. In addition, the charging head network has also carried out a 5C discharge test, and it can be seen that the maximum surface temperature is 45 under the 5C rate discharge state3℃。
Overall, the cell's small size makes it a wide range of applications in products with strict volume and weight requirements. It can be applied to all kinds of portable devices, small electronic products, handheld tools and other fields to provide reliable power support. It also shows strong potential in terms of reliability and stability. For applications that require high-performance and reliable power supplies, such as outdoor adventure equipment, handheld tools, etc., it provides reliable power support for the needs of different application scenarios.