Mike leroy
Active Member
The motivation is Amtrak extended weekend vacations from SF Bay Area. A Google Sheet for Shasta Century ride. 47 miles are downhill, which will regenerate the battery. So, the bike needs to power 53 uphill miles. The bike has climbed 82 miles of Oregon trails with 10% battery to spare. My goal is maintain a minimum speed of 10mph, regardless of hill steepness. I do not care how fast I go.
I spent over an hour discussing the Polaris Apex with Mike Tumulty, 978-910-0008 x10, mtums@polarisebikes.com . We believe the 100 mile Shasta ride is possible on one battery with careful planning. You might get a deal on some of the Fleet bikes available to the public. The Fleet bikes are enhanced Aapex bikes for Police in all black color. Zero to 25mph in 5 seconds.
I learned to pay most attention to the battery in the electrical system. Details matter because batteries are the most limited resource. The weakest link principle applies to batteries. If any cell fails, the entire system is vunerable. Supporting the performance is each cell greatly enhances the entire electrical system. The Polaris system enhances battery performance with a Battery Management System for each cell, rather than a single BMS for all cells.
The battery chemistry and architecture is fundamental to overall performance. 48V provides power. 6Amps is low power consumption. LMO is the chemistry, manufactured by Samsung.
Incomplete: Ragone Chart from Polaris has not yet arrived.
Ratone Chart BU:
"All power sources have limitations and the energy drawn must be harnessed carefully so as not to exceed the permitted loading. An analogy is a bicycle rider who chooses the best gear ratio to transfer energy into propulsion. On a flat road a high gear provides fast movement with moderate pedal action, and this can be compared to high voltage. Climbing a hill with the same pedaling action increases the torque, and in our analogy this corresponds to high current. The pedal force the rider exerts relates to power in watt (W); the endurance before exhaustion defines energy in watt/hours (Wh)."
Planning and strategy greatly overcome battery limitations. Fitness minimizes battery demands. Polaris Active Trail allows fit individuals to turn off battery consumption, except when pedaling uphill. A huge energy savings. Any regeneration strategy is helpful. Half of the Mt. Shasta ride is downhill. Careful planning may allow 15% or more energy replenishment on the Shasta route. The battery can also be recharged during the lunch break.
The manner in which energy is consumed is important. Polaris optimizes power consumption for each gear. The low gears generate torque. The two mid gears are most energy efficient. The three highest gears are designed for speed. Use the gears with respect to energy consumption.
Technology making 100 mile on a single battery possible for me. I am 6 feet tall and weigh 185 pounds. I run or hike at least 30 miles each week. The assumptions are:
I spent over an hour discussing the Polaris Apex with Mike Tumulty, 978-910-0008 x10, mtums@polarisebikes.com . We believe the 100 mile Shasta ride is possible on one battery with careful planning. You might get a deal on some of the Fleet bikes available to the public. The Fleet bikes are enhanced Aapex bikes for Police in all black color. Zero to 25mph in 5 seconds.
I learned to pay most attention to the battery in the electrical system. Details matter because batteries are the most limited resource. The weakest link principle applies to batteries. If any cell fails, the entire system is vunerable. Supporting the performance is each cell greatly enhances the entire electrical system. The Polaris system enhances battery performance with a Battery Management System for each cell, rather than a single BMS for all cells.
The battery chemistry and architecture is fundamental to overall performance. 48V provides power. 6Amps is low power consumption. LMO is the chemistry, manufactured by Samsung.
Incomplete: Ragone Chart from Polaris has not yet arrived.
Ratone Chart BU:
"All power sources have limitations and the energy drawn must be harnessed carefully so as not to exceed the permitted loading. An analogy is a bicycle rider who chooses the best gear ratio to transfer energy into propulsion. On a flat road a high gear provides fast movement with moderate pedal action, and this can be compared to high voltage. Climbing a hill with the same pedaling action increases the torque, and in our analogy this corresponds to high current. The pedal force the rider exerts relates to power in watt (W); the endurance before exhaustion defines energy in watt/hours (Wh)."
Planning and strategy greatly overcome battery limitations. Fitness minimizes battery demands. Polaris Active Trail allows fit individuals to turn off battery consumption, except when pedaling uphill. A huge energy savings. Any regeneration strategy is helpful. Half of the Mt. Shasta ride is downhill. Careful planning may allow 15% or more energy replenishment on the Shasta route. The battery can also be recharged during the lunch break.
The manner in which energy is consumed is important. Polaris optimizes power consumption for each gear. The low gears generate torque. The two mid gears are most energy efficient. The three highest gears are designed for speed. Use the gears with respect to energy consumption.
Technology making 100 mile on a single battery possible for me. I am 6 feet tall and weigh 185 pounds. I run or hike at least 30 miles each week. The assumptions are:
- Active Trail - only using power when going uphill.
- Gear Speed Technology - like motorcycle downshifting for climbing, rather than speed.
- Full Generation - expecting to recharge 15-30% of the battery
- Lithium ion manganese oxide battery chemistry - each battery, rather than entire pack, has a battery management system. Protects against weakest link in power system.
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