Page 157 - Robot Design Handbook ROBOCON Malaysia 2019

2.2.2 Power Source

Both robots uses the same type of power source which is Lithium Polymer (LiPo)
battery. LiPo battery is a rechargeable battery with XT90 connector plug. There are two

different batteries used, which are 22.2 V 5000 mAH 6S 40 C LiPo Rechargeable Battery
and G-Max Power 2500 MAH 45 C 14.8 V 4S1P LiPo Battery, as shown in Figure 13 (a)

and (b), respectively. For the 6S LiPo battery, the minimum power capacity it can hold is

6000 mAh and can generate output voltage of 22.2 V. The dimension of the battery is 170
(L) mm x 50 (W) mm x 57 (H) mm. The big capacity is required for such application which

requires 24 V to operate.

(a) (b)
Figure 13: (a) 22.2 V 5000 mAH 6S 40 C LiPo Rechargeable Battery
(b) G-Max Power 2500 MAH 45 C 14.8 V 4S1P LiPo Battery

For the G-Max LiPo battery, it can hold a capacity of 2500 mAh and can generate
output voltage of 14.8 V with the dimension of the battery 110 (L) mm x 34 (W) mm x 33

(H) mm. This battery is mainly used to give power supply to Arduino Mega and other
components.

2.2.3 DC Motor for Robot’s Mechanism

The DC motor attached on both robots is 24 V DC motor with 300 RPM rated speed

as shown in Figure 14 (a). The DC motor is used to rotate the mecanum wheels on the
manual robot and to move the automatic robot’s legs. To minimize the number of driver

used, two DC motors are connected to a two-channel motor driver, which results in two
drivers are used for the mecanum wheels and the other pair is used for moving the legs. The

aim of using this type of DC motor is to achieve the high rated speed and torque which

produce more efficient and smoother robot motions.

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