Battery discharge characteristics for IEEE 802.15.4 based radio load profile

This dataset reports the discharge profiles of 4 battery chemistries under IEEE 802.15.4 radio load profiles. The batteries were independently subjected to a five-step method to record the discharge characteristics. These discharge currents, their effect on battery capacity, and surface temperature may affect the overall battery lifetime, which was the major aim to discover. The following batteries were used in these experiements

Tag

Manufacturer

Model

Battery Chemistry

Capacity (mAh)

Nominal Voltage

C-Rate

Batt1

Powerizer

MH-AAA1000APZ 

Nickel-Metal Hydride (Ni-mh)

1000

1.2 V

1C

Batt2

Data Power Technology

DTP603450 

Polymer Lithium-Ion (LiPo)

1000

3.7V

1C

Batt3

Panasonic

UF553443ZU 

Lithium-Ion (Li-ion)

1000

3.6V

1C

Batt4

Energizer

LR-6 

Alkaline (Zinc, Magnesium Dioxide)

Variable, load dependent

1.5V

2C

The five step methodlogy proceeded as:

Pre-conditioning Tests
Relaxation Tests
Battery Capacity Test
OCV Vs SOC Test
Battery Surface Temperature Tests

The parameters were recorded at every 1 minute interval from a fully charged to a fully discharged state.

Methods
The batteries were placed in a climate chamber to keep the temperatures constant. A data logging and buffering circuit was designed that recorded the battery voltages during the discharge cycles. Each battery was independently subjected to IEEE 802.15.4 based radio current profiles and therefore recorded accordingly. A total of 12 observations were made to record the discharge characterisitics of the batteries. In addition, 4 set of observations were made to record the effect of current on battery surface temperature. 

The battery relaxation time is important in identifying the optimum charge capacity of the battery. Therefore, the batteries were fully charged before being discharged at three separate SOC levels (corresponding to 90%, 50%, and 10%, respectively) after a 24-hour rest period. During this relaxation time, voltages were measured with a one-minute resolution and were compared to OCV measurements after 24 hours. The battery was considered quasi-stabilized at this stage. The OCV error between stabilized battery states can be computed from Equation below.