Foreword
Recently, the charging head network found a soft-pack battery cell from Amprius in the dismantling of a green 10000mAh magnetic wireless charging mobile power supply, with a single capacity of 5000mAh, which uses two pieces in parallel to form a 10000mAh capacity, the overall volume is light and compact, Amprius is a pioneer of advanced energy storage materials, and its team is the world's leading battery manufacturer in the research of nano-scale silicon-based anode batteries at Stanford University, with products covering mobile phones and tablets. Laptops, wearables, drones, and more. Amprius adopts a combination of advanced material technology and advanced process technology, and the industry-leading silicon anode technology enables the battery to have a small size and large rate under the same capacity, or a larger capacity and a larger rate under the same size. Its battery cell products have been given in large quantities to brand customers such as Anker, Xiaomi, OPPO, vivo, Greenlink, Baseus, Meituan, etc., let's take a look at the performance of this cell.
Appearance introduction
The whole 626078 pouch cell of Amprius is rectangular in structure, which is encapsulated with conventional aluminum-plastic composite film, and the positive and negative electrodes on the side are exposed.
The front 626078 Amprius pouch cell is printed with the relevant parameters
H626078CV "and "+" positive and negative pole markings.
Typical Capacity: 500mah@02c；
Nominal voltage: 37v；Nominal energy: 185wh；
Cycle life: +06c/-1c 4.35v-3.0v ≥80%@300；
AC internal resistance: 60m.
The length of the 626078 pouch cell is about 767mm。
The width of the 626078 pouch cell of Amprius is approximately 598mm。
The thickness of the 626078 pouch cell is about 6mm.
The weight of the 626078 pouch cell is about 671g。
The upholstery cells 626078 Amprius occupy the palm of an adult's hand.
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 with a current of 1000mA, 02C is to charge the Amprius 626078 pouch cells, and the charging cut-off voltage is 435V, it takes about 5 hours and 17 minutes.
0.5C charging
Draw a line chart with a current of 2500mA, 05C is the charging of the Amprius 626078 pouch cell, and the charging cut-off voltage is 435V, it takes about 2 hours and 30 minutes.
1C charging
Draw a line chart, set the current to 5000mA, 1C to charge the Amprius 626078 pouch cells, and the charging cut-off voltage is 435V, 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 17 minutes to charge 2C to fully charge, 0It takes 2 hours and 30 minutes to charge 5C and 1 hour and 40 minutes.
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 1000mA, 02c is the discharge of the amprius 626078 pouch cell, and the average voltage is 371V, put to the cut-off voltage of 30V, it takes about 5 hours and 04 minutes, the capacity is 5077mAh, and the energy is 1882wh。
0.5C discharge
Draw a line chart with a current of 2500mA, 05C is the discharge of the amprius 626078 pouch cell, and the average voltage is 361V, put to the cut-off voltage of 30V, it takes about 1 hour and 56 minutes, the capacity is 4875mAh, and the energy is 1761wh。
1C discharge
Draw a line chart, set the current to 5000mA, 1C is the amprius 626078 pouch cell discharge, and the average voltage is 348V, put to the cut-off voltage of 30V, it takes about 56 minutes, the output capacity is 4735mAh, and the energy is 1646wh。
Summarizing the test data into **, it can be seen that the battery cell is discharged at three magnifications, and the shortest discharge time is 1C discharge, and the discharge time is about 56 minutes. The longest discharge time is 02C discharge, the discharge time is about 5 hours 04 minutes.
The test data is summarized into a histogram, and the overall discharge energy in the discharge test is 1646-18.between 82wh; Among them, the highest discharge energy is 02C discharge gear, discharge energy up to 1882wh；The lowest discharge energy is the 1c discharge gear with a discharge energy of 1646wh, which is a big gap with other discharge rates.
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 5077mAh, which exceeds the rated capacity, and the lowest discharge capacity is the discharge capacity of the 1C discharge gear 4735mAh.
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 Embrius 626078 pouch cell is 60m.
Draw out the histogram and you can see 4The internal resistance of 35V is 29 when fully charged81mω，3.The internal resistance of 0V air power is 2995m, none of which exceeded the nominal internal resistance, and the difference between the internal resistance in the full power and empty power state is small, and the performance is 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
626078 amprius pouch cells to 0Charge at 2C rate for 30 minutes, and the maximum surface temperature is 282 or so.
0.5C charging
626078 amprius pouch cells to 0Charge for 30 minutes at 5C rate, and the maximum surface temperature is 313 or so.
1C charging
The amprius 626078 pouch cells were charged at 1C rate for 30 minutes, and the maximum surface temperature was 282 or so.
Discharge temperature test
0.2C discharge
626078 amprius pouch cells to 0The discharge was carried out at a rate of 2C for 30 minutes, and the maximum surface temperature was 262 or so.
0.5C discharge
626078 amprius pouch cells to 0The discharge was carried out at a rate of 5C for 30 minutes, and the maximum surface temperature was 292 or so.
1C discharge
The Imprius 626078 pouch cells were discharged at 1C rate for 30 minutes, and the maximum surface temperature was 391 or so.
Summary of the charging head network
This Amprius 626078 pouch battery cells, and the charging head net 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 5077mAh, and the discharge energy reaches 1882wh, all exceeding the nominal parameters, excellent performance.
Internal resistance and temperature performance, you can see 4The internal resistance of 35V is 29 when fully charged81mω，3.The internal resistance of 0V air power is 2995m, none of which exceeded the nominal internal resistance, and the difference between the internal resistance in the full and empty states was small; In terms of temperature, the temperature was tested after 30 minutes of charging and discharging at three groups of different rates, and the charging temperature was in the range of 28-36. The discharge temperature is in the range of 26-39.
This Amprius 626078 pouch cell has performed well in a number of tests. Its charging and discharging performance exceeds the nominal parameters, and the discharge capacity and energy are excellent. The internal resistance is stable, the temperature is controlled within an acceptable range, and it shows excellent comprehensive performance, which is suitable for the needs of various application scenarios.