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News‎ > ‎

Powering Protei_010 with off the shelf batteries

posted Jul 22, 2012, 11:51 AM by Gabriella Levine   [ updated Jul 27, 2012, 12:52 AM ]
The idea is to use standard, off the shelf, easy to purchase components, so rather than a Lithium ion polymer rechargeable battery, we plan to go with a standard c or d cell battery.

my inclination is to go with 8 C Cells, but soon I will do tests with the motors to see how long this has the potential to last. See below for battery specs.

Using openrov's kits as a model:

100mm OD cast acrylic “Electronics Tube”
28.5mm OD Nylon “Battery Pack Tube” (2x)
Conical compression springs for Battery Pack Tube (4x)
Rubber end caps for Battery Pack Tube (4x)

For powering motor and Arduino:

Batteries: See here for all about batteries

Best option: to configure the battery cells in a way that you can slip individual cells into, or ones that you can buy rechargeable cells into, often configured like this:



Off the shelf batteries:

8 alkaline c cells (one time use):
approx price: $10/12 pack
weight: 65 g
size: 26x50 mm
V: 1.125 during disharge
mah: 7800
watt hours: 9.56

For Protei: 8 total C alkalines = 62400 mah

D alkaline cells are also an option:
17000 mah
2x as heavy (135 g) 

For Protei: 8 total D alkalines = 136000 mah

rechargeable (NiMh c cells):
C CELL
weight: 82 g
size: 34x60 mm
V: 1.2 V
mah: 4500 mah (8 batteries = 36000 mah)
watt hour: 3456

D Nimh cells: 170 g
v: 1.2
mah: 41040 (8 batteries = 328320 mah)

Battery holder options for c cell:
1. Plastic case rectangular:
and make a rectangular box

2. cylindrical nylon tubiing like openrov:
28.5mm OD Nylon “Battery Pack Tube” (2x)
Conical compression springs for Battery Pack Tube (4x)
Rubber end caps for Battery Pack Tube (4x)

3. Lego 3-c cell battery tube:

Look at this totally DIY way to make a battery tube for d-cells: 
 
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