By Bronson Woodring
• Batteries are commonly stored in the box that they are purchased in or just an
open cabinet, free to roll and drool(acid)
• Batteries are now tested using devices that may work, but are not able to
store the batteries.
• When battery acid leaks it can ruin the existing batteries around it, so by
separating them more batteries can be rescued.
• Can not tell by holding or visual observation if a battery is a viable battery.
Problem: Is there a cost effective way to test a battery’s
life and separate them if one goes bad.
Purpose: I could create a battery storage device that
separates the batteries and tests the life of the batteries
efficiently.
Amount of Substance
Estimated Cost (based on
current google searches)
Projected Total Cost
70.73 g of Polyactic(PLA) Plastic $2.66
$2.66
AA Battery
$1.59 each (Duracell)
Not included
LED Light
$0.15 (Mini-colored)
$0.75
Aluminum Foil
$0.02 per 2.54cm2
Was not used in final product
Copper Wire
$2.65 per 454 grams
$0.86
Labor (Drilling, gluing, placing,
cutting, 3D printing program
time, thinking)
$4.00 per hour – Printer time
$7.25 per hour – High School
student minimum wage
Varied based on design
Gorilla Glue
$16.00- 227 grams
$0.43 (approx. 6 grams)
Total Projected Cost: $4.70 (without printer time)
Schematic #1
NOTE: Measurements in inches
required for 3D printer program
Schematic #2- 3D Printer
Identify Problem
Battery Tester
1.
2.
3.
4.
5.
6.
Sketch
Draft
Print (3D Printer)
Wiring
LED’s
Adjustments, Trials, Final touches
Battery separation
Drawer Design
AA Batteries
Separation distance
Electrical Testing Component
Wiring, LED
Closed Circuits
Commercial Battery Tester
• Total Weight: 68.04g
• Length : 3.505cm
• Width: 6.985cm
• Height: 7.620cm
• Cost (Retail Value): $8.99
• Advantages: Small & Easily Portable,
Can test D/C/AAA/AA/9v
• Disadvantages: Generally Expensive,
Can’t store batteries, tests 1 at a time
EXPERIMENTAL BATTERY DRAWER
• TOTAL WEIGHT:
• LENGTH: 19.69CM
• WIDTH: 6.985CM
• HEIGHT: 2.235CM
• COST: $8.00 WITH LABOR (AA BATTERIES
NOT INCLUDED)
• ESTIMATED RETAIL VALUE: $10.00
• ADVANTAGES: CHEAP TO MANUFACTURE & COST EFFECTIVE,
STORES UP TO
5 BATTERIES AT A TIME/CAN TEST ALL 5,
CAN BE EXTERNALLY TESTED (FUTURE ENDEAVOR)
• DISADVANTAGES: NOT VERY PORTABLE, SOMEWHAT
FRAGILE
• I set out to make a storage device and testing device for batteries
efficiently . The cost analysis indicates there is a viable product here,
• Estimated profit margin of $2.00 per device (approx. 25% profit)
• 8 x 0.25 = $2.00
• Device was limited to testing on AA batteries because the battery storage
compartments were tight.
• No soldering was done to the exposed wires at this time. This will need to
be corrected or wires contained prior to selling, to avoid tampering, or
being shocked
• An external switch needs to be
added as to not drain the stored
batteries
• Material costs will change over
time and substitutions may yield
better profits
• Market research may show other
improvements for product and
device updates
• HASD School Board and
Administration
• Advisors
• HASD Technology Department
• Aaron Kuhn