SAFD 14430DC battery review: small size, high energy, meeting the needs of diverse smart devices

Previously, the battery trading network introduced the low-temperature series of batteries launched by Shenzhen Genju Technology Co., Ltd. (hereinafter referred to as "Genju Company"), a self-developed brand WORWORF, which can be used normally in an environment of -40℃~60℃, and the SAFD series of batteries, which mainly develops high-rate, high-capacity and small-size batteries, mainly used in smart two-wheel travel power tools, smart homes, smart robots, drones, portable energy storage, medical equipment, industrial equipment and other fields.

The above is the professional development and production of high-quality lithium-ion batteries by SAFD, a subsidiary of Shenzhen Genju Technology Co., Ltd., with battery models: 18350HA, 18490DB, 14500DA, 18650-25HR, 18650-30HQ, 18650-35ME, 21700-50ME. It has also passed UN38.3, IEC62133, MSDS, CE certification, as well as high-safety structural design, precise power-off and pressure relief devices. At the same time, overcharge, over-discharge, over-temperature and over-current protection are set.

With the popularity of lithium batteries, more and more small household appliances are equipped with lithium batteries to achieve wireless, which brings the problem of compact internal space. In order to achieve long battery life and light weight on these products; SAFD has developed small batteries with slender and compact size; it solves this problem very well. Previously, the battery trading network introduced the appearance and specification information of SAFD 14430DC battery cells. This time, the battery trading network will test the charging and discharging, internal resistance and temperature tests. Let's take a look.

Introduction to the specification book

From the specification book, we can learn: standard capacity 900mAh@0.2C, nominal voltage 3.6V, standard charging current 450mA (0.5C), maximum charging current 900mA (1C), charge and discharge cut-off voltage 4.2V/2.75V, standard discharge current 180mA (0.2C), maximum discharge current 2700mA (3C).

Appearance introduction

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

The SAFD 14430DC battery cell is cylindrical in design and uses a green battery sleeve color. The sleeve color can be adjusted according to requirements to meet the diverse needs of customers.

The other side of the SAFD 14430DC battery cell has a spray code:

"SAFD 14430DC and 1NDCFA (factory code)" and "+", "-" positive and negative pole identification;

rated capacity: 900mAh@0.2C;

nominal voltage: 3.6V;

nominal energy: 3.24Wh;

AC internal resistance: ≤90mΩ.

The negative contact surface of the SAFD 14430DC battery cell is made of alloy metal material, anodized, durable and corrosion-resistant.

The positive contact surface of the SAFD 14430DC battery cell is still made of alloy material and is equipped with three vents.

Using a plastic caliper to measure, the cylindrical height of the SAFD 14430DC battery cell is about 42.6mm.

Using a plastic caliper to measure, the diameter of the SAFD 14430DC battery cell is about 13.9mm.

The weight of the SAFD 14430DC battery cell is about 17.9g.

Comparison between the SAFD 14430DC battery cell and the palm of an adult man.

Charge and discharge test

After looking at the appearance, let's get to the point; the following will be charged and discharged at 0.2C, 0.5C and 1C rates.

Charge test

The charging test will perform constant current and constant voltage charging at 0.2C, 0.5C and 1C rates, and calculate the total time consumed.

0.2C charging

Draw a line graph, set the current to 180mA, 0.2C for SAFD14430DC battery charging, charging cut-off voltage to 4.2V, charging to 4.2V time is about 4 hours and 45 minutes, trickle full time is about 5 hours and 12 minutes.

0.5C charging

Draw a line graph, set the current to 450mA, 0.5C for SAFD14430DC battery charging, charging cut-off voltage to 4.2V, charging to 4.2V time is about 1 hour and 50 minutes, trickle full time is about 2 hours and 25 minutes.

1C charging

Draw a line graph, set the current to 900mA, 1C for SAFD14430DC battery charging, charging cut-off voltage to 4.2V, charging to 4.2V time is about 49 minutes, trickle full time is about 1 hour and 35 minutes.

The test data is plotted into a line graph. In the charging test, it takes 5 hours and 12 minutes to fully charge the battery with 0.2C trickle charge, 2 hours and 25 minutes to fully charge the battery with 0.5C trickle charge, and 1 hour and 35 minutes to fully charge the battery with 1C trickle charge.

Discharge test

In the discharge test phase, constant current discharge will be used to calculate the total time consumed and the discharged capacity and energy values.

0.2C discharge

Draw a line graph, set the current to 180mA, 0.2C discharge for SAFD14430DC battery cell, average voltage 3.65V, discharge to cut-off voltage 2.5V, take about 4 hours and 58 minutes, discharge capacity 894mAh, and discharge energy 3.26Wh.

0.5C discharge

Draw a line graph, set the current to 450mA, 0.5C for SAFD14430DC battery discharge, average voltage 3.61V, discharge to cut-off voltage 2.5V, take about 1 hour and 57 minutes, discharge capacity 883mAh, release energy 3.19Wh.

1C discharge

Draw a line graph, set the current to 900mA, 1C for SAFD14430DC battery discharge, average voltage 3.46V, discharge to cut-off voltage 2.5V, take about 57 minutes, discharge capacity 894mAh, release energy 3.08Wh.

Summarize the test data into a table, it can be seen that the battery is discharged at three rates. The shortest discharge time is 1C discharge, which is about 57 minutes. The longest discharge time is 0.2C discharge, which is about 4 hours and 58 minutes, which is far behind the other discharge gears.

The test data is summarized into a bar chart. The overall discharge energy in the discharge test is between 3.08-3.26Wh; the highest discharge energy is 0.2C discharge gear, which reaches 3.26Wh; the lowest discharge energy is 1C discharge gear, which is 3.08Wh.

Let's take a look at the difference in capacity released by each gear. By plotting the data into a curve chart, we can see that the 0.2C discharge gear releases a capacity of 894mAh, 0.5C releases 883mAh, and 1C releases 869mAh.

Internal resistance test

For the internal resistance test, the battery trading network will use an internal resistance tester to test the full-charge internal resistance and the empty-charge internal resistance respectively.

Summarizing the test data into a table, we can see that the full-charge internal resistance voltage is 4.2V, and the empty-charge internal resistance voltage is 2.5V. The nominal internal resistance of the SAFD14430DC battery cell is ≤90mΩ.

Drawing a bar chart, we can see that the 4.2V full-charge internal resistance is 50.1mΩ, and the 2.5V empty-charge internal resistance is 50.82mΩ, both of which do not exceed the nominal internal resistance, and the difference between the full-charge and empty-charge states is small, and the performance is excellent.

Temperature test

For the temperature test, the battery trading network will measure the temperature after 30 minutes of each charge and discharge rate.

Charging temperature test

0.2C charging

The SAFD14430DC battery cell is charged at a rate of 0.2C for 30 minutes, and the highest surface temperature is about 27.5℃.

0.5C charging

The SAFD14430DC battery cell was charged at 0.5C for 30 minutes, and the maximum surface temperature was about 27.7℃.

1C charging

The SAFD14430DC battery cell was charged at 1C for 30 minutes, and the maximum surface temperature was about 29.1℃.

Discharge temperature test

0.2C discharge

The SAFD14430DC battery cell was discharged at 0.2C for 30 minutes, and the maximum surface temperature was about 27.4℃.

0.5C discharge

The SAFD14430DC battery cell was discharged at 0.5C for 30 minutes, and the maximum surface temperature was about 28.2℃.

1C discharge

The SAFD14430DC battery cell was discharged at 1C for 30 minutes, and the maximum surface temperature was about 28.9℃.

Summary of Battery Trading Network

This SAFD14430DC battery cell was tested by Battery Trading Network at three rates: 0.2C, 0.5C and 1C. In terms of charging, the 1C rate charging can be completed in 1 hour and 35 minutes. In terms of discharge, it can be seen that the 0.2C rate discharge discharge capacity is 894mAh, and the energy released reaches 3.26Wh.

In terms of internal resistance and temperature performance, first of all, in terms of internal resistance, the 4.2V full-charge internal resistance is 50.1mΩ, and the 2.5V empty-charge internal resistance is 50.82mΩ, which does not exceed the nominal internal resistance, and the difference between the full-charge and empty-charge states is small, and the performance is excellent; in terms of temperature, the temperature was tested after 30 minutes of charging and discharging at three different rates. The charging and discharging temperatures were all in the range of 27-29℃, and the overall temperature performance was good.

Overall, SAFD 14430DC battery cell meets the needs of wireless and long battery life of small household appliances with its small size, high energy density, good charging and discharging performance, low internal resistance and stable temperature control performance, and is suitable for a variety of application scenarios.