P11401: Portable High Power-Density Energy System
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Establish Target Specifications

List of Metrics

The table below presents the metrics, or engineering specifications, that will be used by the team to design against.

List of Metrics
Metric No. Metric Units
1 Net weight lbs
2 System volume cubic feet
3 System sound pressure level (audible noise) dB
4 Power: rated, peak Watts
5 Voltage: rated,peak Volts
6 Ripple: % of battery voltage %
7 LiIon battery charge time %
8 LiIon battery discharge time hrs
9 Quantity of battery charging at one time Battery
10 Energy generation efficiency hrs
11 Energy storage efficiency %
12 Impact resistance ESS Drop Test
13 Operating temperature range degrees C
14 Compatible with P11201 test bench Demonstration
15 System surface operating temperature degrees C
16 RoHS compliant Demonstration
17 Achieve power Watt-hr
P11401 Needs and Specs

P11401 Needs and Specs

You can also view the Excel File Version

Ideal and Marginally Acceptable Target Values

Given the customer needs, awareness of the marketplace, and resource limitations of the current project, preliminary engineering specifications have been set on each of the metrics.

List of Metrics
Metric No. Need No. Metric Units Marginal value Ideal Value
1 Need 1 Net weight lbs less than 30 less than 20
2 Need 1 System Volume cubic feet 7 5
3 Need 2 System sound pressure level dB 90 75
4 Need 3 Power Watts 3 5
5 Need 3 Voltage Volts 4 5
6 Need 3 Ripple: % of battery voltage % 0.5 0.1
7 Need 3 LiIon battery charge time hours 3 2
8 Need 3 LiIon battery discharge time hours 1.5 2
9 Need 3 Quantity of Battery Charging Battery 1 1
10 Need 4 Energy generation efficiency % 30 40
11 Need 4 Energy storage efficiency % 50 70
12 Need 5 Impact resistance feet 3 5
13 Need 5 Operating temperature range Degrees Celsius (30) to 60 (40) to 70
14 Need 6 Compatible with test bench Binary n/a Yes
15 Need 7 System surface operating temperature Degrees Celsius 70 60
16 Need 7 RoHS Compliant Binary n/a Yes
17 Need 8 Achieve Power Watt-hour 50 60

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