NEX ROBOTICS SPARK V ATMEGA16 Hardware Manual page 13

3.2 Powering up Spark V
Spark V is powered by six AA sized NiMH rechargeable batteries. 2.1Ah battery gives about
two hour battery operation. Battery is available as preassembled 6 cell pack or robot has AA
sized 6 cell battery holder. Battery is connected with the robot using 4 pin relimate connector
which is located in the left sided of the caster wheel.
For safety during the transportation robot's battery connector is disconnected. Connect the
battery connector before first use.
Before connecting the battery pack or inserting batteries in the socket, make sure that power
switch of the robot is off. Robot has onboard smart battery controller which can charge the
installed batteries. You need to charge the battery before first use. Use any AC adaptor / SMPS
which can give accurate 12V DC and 1Amp current. For battery charging procedure refer to
section 3.4. For robot powering options, refer to section 3.5.
3.3 Power management system on the SPARK V
Spark V is powered by 6 NiMH rechargeable batteries of 0.8Ah and above capacity. When it is
fully discharged voltage drops to about 7V. Battery pack should not be discharged below 6V (1V
per cell) to extend the battery life. Spark V has onboard smart battery controller which monitors
battery status. Nickel Metal Hydride batteries must be recharged using smart charging circuit
which follows the appropriate charging profile for the batteries. To avoid any damage to the
batteries, only use onboard battery charger.
Power management block on the SPARK V performs following functions.
1. Battery low warning in case battery is below critical level
2. Regulated supply for onboard payload.
3. Battery charging when robot is powered off and external battery charger is
connected.
© NEX Robotics Pvt. Ltd. and ERTS Lab IIT Bombay, INDIA
Figure 3.4: Battery packs in Spark V
SPARK V ATMEGA16 Hardware Manual
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