Table of Contents |
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Specifications
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Specification | Details |
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Manufacturer | Hero Eco - https://heroeco.com/ |
Bike Web Site | https://www.f4wbikes.com |
Model | FAST4WARD Peak |
Model Year | 2012 |
Price | $1,799 USD |
Category | Mountain Bike / ATB | - |
eBike Type | Pedelec | up to 20 mph |
Frame type | male |
Frame size | , |
Weight | 46 lbs |
Range | 37 miles * (60km) |
Engine | |
Engine Position | rear hub |
Engine Power | 250 Watt |
Assists until | 20 mph |
Battery Type | Lithium-Ion |
Battery Characteristics | 324.00 Wh / 9.00 Ah / 36.00 V |
Range | 37 miles (60km) |
Gearshift/Brakes | |
Gearshift Type | derailleur |
Gears | 8 |
Gearshift Brand | Shimano Alivio |
Brakes Type | V-Brake |
Suspension | |
Suspension front/rear | Yes / No |
Tires | |
Size | 26 x 1.75 |
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Battery
Sony 36V 9Ah Lithium Ion 324 Watt Battery
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Capacity | Expected | Actual | Percentage |
---|---|---|---|
Ah | 9 Ah | 2.6 Ah | 29% |
Wh | 324 Wh | 93 Wh | 29% |
Disassembly
New Battery
Configuration
10s4P
Layout
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Rebuilding the Battery
New BMS
Max Housing Size - 100mmx65mm
Current BMS
Circuit
Capacity Test
Capacity | Expected | Actual | Percentage |
---|---|---|---|
Ah | 9 Ah | 9.24 Ah | 103% |
Wh | 324 Wh | 334 Wh | 103% |
Battery Rebuild
Why?
The battery kept shutting off a lot. Seemed to be happening when pulling a large amount of current. Must be a battery/bms issue.
Testing the cells showed that they were within spec.
Cell 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
---|---|---|---|---|---|---|---|---|---|
3.957 | 3.959 | 3.966 | 3.968 | 3.975 | 3.969 | 3.979 | 3.985 | 3.977 | 3.988 |
I decided to disassemble the battery and test every cell. They appear to be fine. Capacity tests results were good.
When disassembling the battery, I noticed a wire with exposed copper. I assumed I hit it with the razor blade when taking it apart but it may have pre-existed.
Ordered a new Smart BMS with Bluetooth which might help diagnose future issues.
Repacking
Anchor
Bluetooth BMS
aliexpress.com - C$23.63
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Attention
(1)All smart bms support xiaoxiangElectric App IOS and Android version to convert li-ion and lifepo4 parameters.
(2)All smart bms has BT and UART function.
(3)Smart BMS accessories needs buy separately:https://www.aliexpress.com/item/3256804529002284.html
(4)All UART communication can be converted to Canbus communication if needed,
only need to buy a canbus module converter separately.
(5)APP Manual and BMS Specification:pls contact customer service.
Circuit
Initial Replacement BMS
Bluetooth BMS
Wiring
When wiring the BMS monitoring lines, connect the extras to positive. See above picture.
BMS Settings
Capacity Test
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Capacity
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Expected
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Actual
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Percentage
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Rebuild Pictures
I also designed and printed some replacement battery casing gaskets in order to prevent water intrusion.
See House 3D Prints#E-BikeBatteryGasket
Seems to be working! Fingers crossed.
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Motor Controller
Specifications
Specification | Value |
---|---|
Product Number | JDW41-2 |
Voltage | 36V |
Max Current | 15 A |
Rated Current | 7 A |
Low Voltage Protection | 31.5 V |
Throttle Adjustment Voltage | 1.2 - 4.4 V |
Width | 2 3/8" or 60.3 mm |
Length | 3 1/2" or 88.9 mm |
Height | 1 3/4" or 44.5 mm |
Pictures
Wiring
Wire# | No. Wires | Wire Colors | Purpose |
---|---|---|---|
0 | 3 | Green, Yellow, Blue | Motor |
1 | 3 | Red, Green, Yellow | HALL - Wheel Speed Sensor |
2 | 3 | Red, Blue, Black(GND) | PAS - Pedal Assist Sensor |
3 | 2 | White, Yellow | Brakes |
4 | 2 | White, Yellow | Brakes |
5 | 3 | Purple, Grey, Black(GND) | Peddle Assist Switch |
6 | 3 | Red(5v), Green, Black(GND) | Throttle |
7 | 2 | Orange, Brown | Voltage Monitor? - NOT Used |
8 | 1 cable - 5 wires? | Black | Display? - Not Used |
09 | 2 | Red, Black | Battery Power |
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The battery would turn off when pulling higher currents. If I was easy on the throttle, I could get it to stay on.
Testing the cells showed that they were within spec.
...
I decided to disassemble the battery and test every cell. They appear to be fine. Capacity tests results were good.
When disassembling the battery, I noticed a wire with exposed copper. I assumed I hit it with the razor blade when taking it apart but it may have pre-existed.
Ordered a new Smart BMS with Bluetooth which might help diagnose future issues.
See Bluetooth BMS.
Rebuild Pictures
Decided to rebuild the battery. See above.
References
Reference | URL |
---|---|
F4W Peak 350W electric bike | https://www.f4wbikes.com/#!peak/cee5 |
F4W (Fast4ward) Peak 350W Electric Bike Review | https://electricbikereport.com/f4w-fast4ward-peak-350w-electric-bike-review/ |
Details | https://www.greenfinder-mobility.com/e-bikes/brand/fast4ward/#/product_preview/1375 |
Review | https://www.youtube.com/watch?v=1bcUQ2ykW_M |
How to install a Brushless DC Controller on Ebike: The missing manual | https://www.youtube.com/watch?v=PuwnFMHHtaE |
Increase speed of ebike: Swagtron EB5 controller upgrade | https://www.youtube.com/watch?v=QbsPzjG-QpA |