Text from his site are as follows: In this video I build a custom electric streetfighter motorcycle. Plans for this project are available at the following link: https://www.resystech.com/electric-st… Though equivalent to most 300cc street bikes in overall power, this little monster boasts a massive 250 ft-lb of max starting torque and over 100 ft-lb of…
Author: Shaun
Design -- love it..!
Alu controller box
Started to experiment with brazing. Cut the alu from the patterns developed in card. bent some stuff and started burning stuff… #fire! Didn’t turn out too bad for a first try at brazing. Had a couple of parts that I decided to bolt to the main box, so that I could disassemble and change the…
Battery case reconfig.
Started to reconfigure the components of the battery box. added DCDC convertor for 12v supply and have moved the connector behind the L-shape bracket that also holds the charger. The battery case is looking a bit worst for ware after being offered up to the frame so many times but nowt a lick of flat…
Lockdown metalwork
Starting to get back into metal fabrication again in the newly announced COVID19 lockdowns. As we’re all locked up in the house I thought I might as well get on with some aluminium work to maintain some progression. Making good use of the sheet bender to form the socket holder and the battery case cover….
Charger mounting
Have finally started to mount components to the frame again to check fit. One item that I haven’t fitted before is the charger. It needed some mods because the cable casing had fractured but it was interesting to see how it fits to the case after a mock bracket had been fabricated. Will start to…
26650s
26650s have arrived. they look like quality items. Up to 70amps, should be more than enough for the for the 30amp system. looking forward to putting these together to make my first self built battery pack — the start of many great things one hopes.
12v 30amp BMS
The 12v 30amp BMS has arrived. Despite the dimensions on the site it is still smaller than I expected, which is good. 4 x 25650 3.7v 70amp Lifepo4 batteries have been ordered so the stabilising systems power supply is nearly ready. As a reminder, this power source is needed to supply the system with a…
Fly screen
Started to look at fly screens. I mocked up a first stab in card. based on the CAS design, feel like it could do with some development though in terms of surface development. After seeing the bike naked for so long I feel that I could do with a smaller version. One that is a…
Final sub-frame laser patterns
Finally finished some lasercut patterns. A couple of changes were made. Only subtle one such as the sub-frame section that holds the type 2 socket is now separated from the main body to make assembly easier. Also, have cut side walls to be replaced by polymer sheets to save weight. Have sent to machinist, should…
Rise(r)… again
To experiment I have mounted some new riser bars that were lower than my 3-4 inch risers. I originally went back to cafe racer bars after planing to use risers because although the rise improved the seating comfort they looked too high, kinda felt like a chopper. However, after trying a couple of bikes that…
Battery BMS/charger socket/cover
After making a few mods to the battery/charge socket cover it became evident that there would be some extra space due to the re-shaping of surfaces. Great news is that there was enough to hold the rectangular BMS board so it looks that i’ll be using this one instead of the flatter square BMS. Rethinking…
Charge point & battery cover
Started to mock-up the sub-frame for the charge point and battery cover. Still enjoying the physical CAD feeling. First stab works but feel that this is an ideal opportunity to make changes to the 3D surface formation that were mentioned in a previous post. Previous fixing points seem less physically stable than originally proposed so…
Mock controller subframe v.5
A finally think i have a final part and pattern to lasercut for the controller subframe. versions 3 and 4 had minor tweeks and changes. however the latest revision is modelled to 1.5mm thickness steel. and covers the controller better while still allowing the wires to run out of the controller pics and pattern below….
Mock controller subframe v.2
Having experimented with the first version obvious flaws were identified in the design of the controller subframe. First, it was slightly dimensionally inaccurate because it was lashed together. Secondly, it was unstable where it fixed to the controller, after a certain amount of yanking around the thin side arms snapped. Obviously the real subframe would…
Mock controller subframe v.1
Have started to check the packaging of the system components on the controller subframe. I used 21650 cells for the 12v battery but plan to use 26650 A123 system cells. This will add an extra 20mm width and 5mm depth but it looks like there is enough space to fit them in. 65mm height will…
COVID garage CAD (Cardboard Aided Design)
Finally managed to get the bike all into one place back in the garage after being locked out of the NTDC due to COIVID19. Thought it would be good to check some things that can be seen in 3D models but still leave a bit of doubt with regards to the real thing. After a…
94% State of health on cells
Despite the COV19 lockdowns that have ground the UK to a halt Dr. Oliver Curnick has worked his magic to test the capacity of the Nissan Leaf cells and it turns out that I have been a lucky guy. All the cells have a rated capacity around 106Ah, 375Wh. ‘They would’ve been 112.6Ah at beginning…
Refinement
Have started to refine the design. Have added a set of fins to cover the controller cover. Main tasks are to redevelop the battery and charging area, refine the fins profiles on the top and bottom covers so they can be laser cut, I’m really liking the fly screen so that needs further development.
Back to Cafe
Being a fickle beast i decided to consider cafe racer bars… again. As I have never visualised XJ600e with cafe racer bars in it’s last phase. I think i quite like it now. As the controller cover is now exposed I think there needs to be a further level of development to detail the front…
ANT-BMS software
Davis an I have been looking around for the software to run the BMS I have. After getting an email address from a Chinese language translator of the label, we got an email but no answer was given to this email unfortunately. But, in a last chance effort to sort this out I posted some…
20A/48v Charger
New charger has arrived. 20A 48v with 2sec precharge. I can finally get some dimensions on the fans to design the bottom covers, especially those behind the front wheel. Total height is about 125mm (inc. cooling fans). It is compact, but on the heavy side. need to design a new mounting bracket for it the…
Circuit refinements
Had a great conversation with Ian Goodman and Davis Kuma concerning the electrics for the XJ600e. Summary of the meeting was: – Add 12v battery in parallel to stop chatter that might turn off the contactor– Change kill switch so it runs in series with the 12v supply– Make a 4th output to Arduino once…
Component update
Very interesting to watch the cost breakdown of the build to date. On top of the initial costs of the hub motor, controller, battery, etc the cost of smaller components is starting to add up to appox a third of the initial cost. Will be interesting to see where it ends. Build components mounting up…
Living with Gravity interview
Have recently been invited to answer an interview for an online magazine called living with gravity. URL is here: http://www.livingwithgravity.com/our-talk-with-shaun-hutchinson A great honour to have the opportunity to write-up some of the details of the project.
v3 Sketch surface update
Surfaces have been update for the xj600e. Using the sketchwork seen in a previous post CAS renders visualise the potential outcomes of using new riser bars instead of the Cafe racer clip-ons and how the change of design direction works in 3D with the current powertrain.
xj600e Part list
The figures on the bike have become interesting. It’s always good to share information on project if only to get comparisons and feedback from others. Parts list below: Parts List: https://tinyurl.com/xj600PartListv1
Electronics Schematics v3
Davis Kuma has made ammendments to his schematic that also include a several new components listed below: – J1772 Active Vehicle Control Board-AVC2– IEC62196 type 2 charging plug/socket– 1200w onboard charger [48v/20A]– Zeva precharge resistor– Indicator relay blinker PDF of the schematics is below:
Hub motorcycle temeratures
Interesting to look at electric Motorcycles from a thermal point of view. A recent post on Facebook took a termal map of an Evoke. In -5 degrees C ambient temperature in Beijing and the hottest part of the 2019 Evoke Urban S is only 26C on the hub motor after a brisk 20 minute ride….
Dash power-up
Davis took a box of electric parts to start desk mock-up of the powertrain. With minutes the dash was alight and on the go. Looking forward to checking out the set-up.
J1772 Active Vehicle Control Board-AVC2
Have been looking at an ideal solution to connect the charger to Public charging points. Ian Goodman has suggested that EV West in the US have a wee box that essentially does the job that Jim McPherson completed in his youTube video in the last post. There product literature describes the box as a: ‘Small…
Charging with an IEC62196-2
I have seen an interesting video connecting a J1772 (type 1) EV plug to an EV motorcycle [above]. Presumably there are some procedures to connect EU/UK IEC62196 (type 2) to road stations. Research is needed. A member of the Electric Motorcycle build page on FB posted a link that discuss the comms between charger/battery &…
Busbar assembly
While at C-ALPS Dr. Curnick contributed some used Busbar assembly parts to reuse on the bike, great stuff to maintain the circular design emphasis of the project. In a previous post various options were discussed as these were proving difficult to acquire. The mythical orange unit came with nickel plated copper busbars and BMS connectors,…
Battery test
Had a good meeting with Dr. Curnick. Dropped off the battery for storage and testing. The facilities for testing at C-ALPS are very impressive. The charge/discharge boxes in the photos can safely test batteries and take the impact of any faults that fire or explosion. The test box run up to 200 amps, the peak…
Home charging
Can’t go without noting that home charging is an important issue in general. It seems that it is possible to simply pull a 32a line out of a domestic RDC. Interesting video online below from that looks at this. On holiday I observed an external charging point at our accommodation, seen in photos below. Since…
Electronic schematics
Davis has started the first phase of schematic development with a diagram. Looks good! Just need to make a additions to it; hazard lights, audible warning, etc for road safety and MOT purposes. Lots of guides online. Nice one here: https://fasttrackmotorcycles.co.uk/mot/mot-checks/lights-and-signals/comment-page-10
IEC62196 type 2 charging plug/socket
I have been thinking abut charging ports. To ensure the unit can be used on roads it is probably sensible to pick a port that is used on 32A 7kw UK charge stations. Looking at cars it seems that most use IEC62196 type 2 nowadays (7 pins). The car socket being male and the gun/plug…
1200w onboard charger [48v/20A]
Pictured in blue in CAD [with wheel travel] is: 1200W on-board waterproof battery charger 48v/20A, KC CE Ro1200W on-board waterproof charger – Main advantage of this charger is compact size– 130mm x 90mm x 230mm– Pre-charging – automatic shut off – over charging protection https://www.alibaba.com/product-detail/1200W-on-board-waterproof-24V-48V_62252160597.html?spm=a2700.details.pronpeci14.11.652e4b9afSCIvk Other options are: 48v 20A 1500W Waterproof Intelligent Battery Charger…
Motorcycle riding posture: A review
This paper by Arunachalam et al., (2019) gives a fair insight regarding the effectiveness of various tools and techniques used for posture evaluation and various research gaps pertaining to the user-centered design of motorcycles to improve riding posture. This second paper by Amrutkar & Rajhans (2011) aims at finding the problems associated with motorcycle riding…
Sketches… v2 (out with the old)
More sketches… this time with a mince pie. It’s Christmas! Version 1 of the XJ600e used aesthetic features that would make it acceptable to the traditional rider. However, further research and dialogue with manufactures indicated that the new rapidly moving marketplace for 2020 preferred aesthetics that were more aggressive and ‘gadget-like’.
Riser bars
Found a couple of moments of time before the holidays kicked in. Started to think about options for seating posture. The height of the bars greatly effects body position on the bike so to consider raising the posture I have hacked the old handle bars to make some new mounting points with some rise bars…
Luminit LED light diffuser
“Hotspots” and uneven light distribution are common problems with filament, arch, LED, CCFL, fiberoptic and laser light sources. Luminitco’s LED light diffuser films smooth and homogenize sources while providing uniform light in critical applications such as LCD backlights, LED displays, machine vision, automotive lighting and viewing screens. https://www.luminitco.com/products/light-shaping-diffusers Unlike conventional plastic light diffusion panels, Luminit’s patented technology shapes light energy with holographic…
Charging Culture
A while back I bumped into an article that looked at the electric bike culture in china. Although they export high volumes of vehicles they themselves have struggled to keep up with the rate of progression in some ways, particularly infrastructure. This article [linked below] discusses Opportunities that have been implemented by locals in terms…
C-ALPS
The project has joined forces with with the Centre of Advanced Low carbon Proportion Systems (C-ALPS) in Coventry University. There they have expertise on electrochemical power sources and battery use in electric vehicles. Conversation have been promising; concerning testing, storage of cells, 2nd life cells model.
Nissan leaf 48v BMS and wiring
Found an interesting video on the you tubes that documents the wiring of a 7 series leaf batteries. This is from Tech Dierct club who resell leaf cells. Very useful to understand the order of wiring and to see the best approach to putting together a pack. Also found a YouTuber working with the same…
Retrofitting workshop India
Bumped into a post on facebook that advertised a Retrofitment course in India, as well as the Gogo Electric vehicle innovative start program. Interesting that the electric revolution is being guided in this way. Furthermore it will be interesting to see the effect these type of workshop have. Will they have similar effect as seen…
Wrong BMS
BMS has arrived from China. They sent a 16s/60v unit when what we need is a 12s/48v according to vendor. Also I believe that the first and second gen leaf batteries have different compositions. – 1st gen: (LMO) Lithium magnesium Oxide. – 2nd gen: (NMC) Lithium Nickel Colbalt Magnesium Oxide We asked the vendor if…
Rough ‘n’ sketchy…
Got bored so I started to sketch on top of the frame. Need to do more… Nice to scratch around in the photo though.
Swingarm brake mods
Have spent a bit of time finishing the rear brake caliper; removing the inside slot brackets and fixing. Also swapped the brake to the right side of the bike to help clear the hydraulic banjo. Still need a new rod, as because I am using the old linked aluminium thin rods. The clevis used was…
Benchmark: bikes of interest v1.0
Some interesting bikes and features… That is all!
Benchmark: leather on bikes
have been interested in traditional approaches to leather on bikes lately. Some examples here.
Rear brake tension bar
Have started to look at mock positions for tension bars on the rear caliper [pictured]. After some conversations on a pre-diversion forum It seems that the old xj600 didn’t have a bar however this still seems like the best option because of the wider wheel and new caliper. Looking at the plan view of the…
Rear brake tension bar
Observing swing arms to consider option to tie the caliper into position. Diversions have used tension bars to fix the caliper into position in the past so I will start by investigating this is an option to see if I can adapt the Chinese caliper bracket with a simple welded lug or even an additional…
Back in the NTDC
The xj600e has moved back to the NTDC for the final phase of the power train development and installation. I have enjoyed working in the more intimate environment of tha garage workshop but here it is ideally placed for Davis Kuma (electric engineer) to gain access to the bike for loom development, etc. Before the…
Battery and controller stand final fit
Have assembled the finished controller stand and battery box with RP spacers & back box. All is perfect in terms of fitment, nice and tight. However the top back of the box still feels bit unsupported so a Y-bracket needs to be made to give it a bit more support, most probably one that fixes…
BMS position
In CAD the Battery Management System box (66 x 180 x 27.5mm) locates nicely at the front of the battery box. Considering that it needs heat sinks to dissipate heat this could be a good position to gain direct air cooling if the bodywork is managed well. The top of the battery box will need…
Battery Management System
Davis Kuma the new electronic engineer on the project has recommended a Chinese Battery Management system: 16S High Current 200A 48V Li-ion Battery PCB PCM with Balance. Details below: Features: With balance, Same port for charge and discharge, Waterproof Main functions:– Over charge protection – Over discharge protection – Short Circuit protection – Over current…
Seat support
Have popped over to the fabrication unit to see how the welding is getting on. The lugs for the fabrication have been positioned… and attached. seems to work well, but will require a decent level of strut fabrication. will make the final rods out of steel. Will most probably move to m8 rod ends too…
Back box panel fit
Have just got a high impact polystyrene vac-form test from a milled mold. The panel fits in the box (currently in the fabrication workshop). V2 Battery Backbox Mold: The first test mold had a couple of issues. First, is that the material used was not appropriate, foam melts under heat after a couple of mold…
2nd-life plastic forming
Found an R25 Schredder grinding machine in the university. In previous posts I have discussed the use of 2nd life material, exemplifying 3Devo as a solution process. Another process that might work well is vacuum forming for fast uncomplex parts. I am currently working on the battery box cover. I think it would be good…
Spacer prints
The spacers prints arrived… Quality is okay, not sure how well they will stand up to a bit of bashing during installation and test use. They were eventually made from PC-ABS (PolyCarbonate – Acrylonitrile Butadiene Styrene), Specification: Layer thickness: 150 µm; Filling: 80 %. Apparently this is good for high mechanical stress. Good for fit…
XJ600 manuals (1984 to 1992)
Found a pre-diversion manual on a forum that has been scanned collated as a PDF document. Amazing what you can find on the internet. Perfect for out-of-garage moments. Also found an original Yamaha Service manual.
E-A-R ISOLOSS
While at The Battery Technology Show in Coventry today I crossed some ideal material on the 3M stand. Polyurethane Foam good to line the inside of the metal case. Might see if I can find some online and have a quick try of it to replace the rubber. At the moment the rubber lining is…
Packing for Li-ion transport
Started to think about improving safety and transport of batteries. Currently the batteries are stored in a polymer box, but I am considering some faire resistant lining for the box. Zarges make transport boxes for lithium-ion batteries (as seen in pic above). They also sell Cirrux; fire resistant cushions. This as seen in the video…
Benchmark: Hyperdrive
At the battery technology show I noticed a company that have a licence to use Nissan leaf batteries in other forms. In camper vans for example. Hyperdrive take the battery modules from the Nissan Sunderland factory.
Rear caliper
Found an interesting rear caliper from an overseas supplier. Conversations with the E-Motorbike community have informed me that this caliper would fit the QS motor hub well, and after an evening of fitment I found that the community were correct. Hurrah! The rear swingarm needs some small modification, but i think these will be minimal….
Benchmark: 48v powertrain
Interesting 48v conversation here using a Honda 250 frame with thunderstruck mid-powered motor, Nissan leaf cells, and Curtis 350amp controller.
Battery mounting spacers
Have fudged about with different sized washers for the day as well as defacing the queen’s head (1.5mm penny washers) to find out some dimensions that work. Might have CAD but nothing beats really fitting parts to see if they are good. Scribbled down some sketch dimensions (below) and bashed together an STL file. Might…
Rods and sleeves
Have had some trouble assembling the case and batteries with the m8 threaded rods efficiency; the threads kept catching on the inside edges of the cells. I have managed to solve the issue by grinding the small end sleeves down. This has increased the hole size to 9mm diameter, perfect for 9od/8id brass rods that…
Circular Design
In the video above Tim Brown talks about the design & the circular economy. A set of resources for circular designers are avalible here: https://www.circulardesignguide.com/resources on the Circular Design guide website. Circular Design is a design movement of recent interest because of it’s links to sustainability. Up to now the xj600e has looked at reusing…
Backbox mould
Note to self: STL file to back box mould is avalible here. http://shaunhutchinson.com/xj600e/batterybox_back_mould.stl
Seat supports v1 fabrication
I have made some strides towards sorting out the seat supports for the bike as discussed in a previous post. Managed to get some aluminium tube, thread taps and rose joints. Need to get a longer 110mm / m12 / 1.75mm thread / 12.9 grade bolt for the mono shock and make some lugs to…
Battery and frame fitment
The case and cells fit the frame surprisingly well. The usefulness of the scan never ceases to surprise me I really couldn’t have designed most of the fitment of any of the custom parts without it. Some custom washers are needed to fit the case to the frames mounting points: Front – 30 L x…
Steel bends and cell fit
Managed to get the laser cuts bent in the workshop. All seems to fit together except for one thing. The front part was cut in two halves instead of one. However, when tied together with the batteries they all fit together with no problem. There is a slight overlap but this should be filled out…
Seat support v1
As a temporary device to stabilise the seat I have decided to rig some rose joints together until I can work out a frame I am happy with. 4 roses and a steel with a thread tapped into it at both ends should serve well for now. The lugs however can be placed in despite…
Prototyping battery case v1
Have finally managed to get some time to put a quick box together to protect and hold the Leaf cells to get the bike up and running for prototype development. Keeping it 48v at the mo, which complies of 3 double block cells. The box made from 5 lasercut (1.5mm thickness) steel sheet, using a…
Ergo simulator
Tugra Erol, academic Doctor of seat comfort in automotive and transport design, shared a link for an ergonomic positioning resourse online. Looks interesting. Don’t have an immediate use for it but it looks like it could be useful at some point. https://cycle-ergo.com
Speed controller plate v1.0
Have started to mount the equipment to the frame, starting with the speed controller. Battery cage is next. Thought i’d try a light weight option and beef it up where nessacery to keep the mass of the bike down. After a bit of backward and forwarding to various metal fabrication options I finally decided on…
Display and night light
Have started to mount the rider display and night headlight to the forks to check the fit. The headlight was a doodle. However the digital display required custom adaption to retro fit them to the top triple tree. After trying a couple of brackets and ordering some new dampers and collars for mounting (PN: 584-83541-00…
XJ600e mock electric assembly v2
The old XJ600e is standing on its own two feet for the first time ever as an electric bike. In fact for the first time ever as it has spent most of its life propped up on a jack. All the parts fit surprisingly well together. Thinking that I will push the stanchions up ab…
Seat hoop progress
Some welding fabrication has taken place on the seat frame. So far the hoop is in position and attached. A new plate to support the lower suspension mounting point has been cut and shaped, and will be on next when the cross bar is fixed across the new hoop.
Leaf busbar covers
Looking around to find covers for the cell connectors. On a Nissan part search the com up as a Part No.: 295B8-3NF0C & 295L1-3NF0A for the buss bar cover and module. Assembly and parts can been seen here online and in photo below. Various places such as Tech Direct Inc sell the module for $75….
Benchmark: Zero to Leaf
Found an interesting internet post on electricmotorcycle.com where zero motorcycle users are swapping their Molicell in the 26700 format (26mm in diameter, 70mm in length) for nissan leaf cells that I have just aquired. It is good to know that this is a feasible solution for others and that a level of success has been…
Rear wheel located
Spent the night grinding with some additional steel plates to make a spindle locator that can be locked into position to stop it falling out of the swing are in the case of a loose spindle bolt. Used M5 bolts into a threaded back plate eventually after some experimentation. Will weld these plates together when…
Swingarm shock mount
The original mount from the Showe shock was redundant because it used a new M12 12.9 grade bolt that fits the frame. With a needle bearing (OD22 x ID16 x L22mm), Bronze Oilite Bearing Bush (ID12 x OD16 x L25mm), copper washers (ID12 x OD16 x L1.5mm), and some 16mm 3mm section oil seals a…
Wheel locators
Also managed to get some steel wheel locators lasercut. Fits the thread securely. just need to make a soft filler to stop rattling. The locator was deliberately made less thicker (5mm) in comparison to the 8mm thick swingarm so that the nuts would securely grip onto it. 3mm nylon locators will be made, these will…
QS72V8000W User Manual
After sales manuals have also come in for the hub motor.
Kelly Controller QSKLS7275H User Manual
Have been looking at the spec for the kelly controller to find user manual for wiring diagrams etc. Seems to have been designed for QS MOTORS but an adapted version of the Kelly KLS7275: https://www.kellycontrollers.eu/kls7275h Spec and details below: GENERAL SPECIFICATION •Frequency of Operation: 20kHz. •Standby Battery Current: < 0.5mA. •5V or 12V Sensor Supply…
QS Dimensions
Opened at the rear to fit the new wheel. Some dimensions taken to help fitment… Nuts provided are made of cheese though, might get some stainless ones and remake the brackets from stronger stuff. #M18nuts
QS Motor – K30425 1031101
What’s in the sexy Chinese box? Time for a bit of unboxing. 17 inch Hub motor, throttle, DC 72v – DC 12v convertor, speedometer, and Kelly Controller. For some reason I imagined that the Kelly controller was smaller. Turns out that it is massive. Finally good to have it all in the flesh to offer…
Fork assembly
Have managed to assemble the front forks after a wee paint job. The hard-chromed stanchions fit well and I just need to get the spindle bolt for the wheel now. Had a fun time with the bushes and oil. Think i just need new bolts for the brake hoses though. Like the looks of the…
Hub motor… is here!
Finally The QS motor hub motor has arrived from china after a lengthy delay in UK customs. What a ball ache that was to get them released. However, this picture was provided by a ‘friendly’ in the NTDC where it was delivered too. Will bob over to the spot to grab it so I can…
Saddle bags?
Been thinking about options for storage for some reasons. If I can make the offset surface on the battery case a bit deeper then I could nest a saddle bag into the design to break-up the surfaces and add interest to the area. Could be an interesting feature. Maybe made from reused leather or weather…
XJ600e (v3)
With a new set of batteries a new design is needed for the faring surfaces. So far these are the closest to the final cells so these designs can move further than the last set. With the Nissan cells the package size is reduced so this leaves. leaves more space in the frame and they…
Rear swingarm linkage bushes
Have been looking for two bushes for the rear swing arm [PN: 90386-18135]; not a sausgae on the internet. That is until I tried a XJ600 facebook group asking if anyone knew a source to buy, or dimensions so I can fabricate some myself? A guy in holland came up against the same struggle so…
Sexy stanchions
The stanchions have come back from Durasurf. Look much better. Just need to finish the outer covers and they are ready to assemble.
Prototype cells
Got some second life 4th gen Leaf cells from a friendly source up north. 14.6v per double module, 4 sets. Will let one set hang back for development to work in 48v for the moment. Now I know the precise dimensions might mock some out of soft foam to try some of the configurations on…
leaf configurations
Trying a couple of battery configuration for the second life leaf batteries to see if any advantages can be found by positioning them. Below is the first; 1) All components low as possible to create low centre of gravity. 2) Main mass (battery) low with controller higher to give a safer clearance for front wheel…
Second life leaf cells
Started to think about a set of prototype cells to experiment with and use for initial testing, etc. Nissan leaf cells are very popular now-a-days, durable, and very easy to work with as you can just use threaded screws to link the cells together with busbars and bolt them together with all tread rods. I…
An electrifying life on two wheels... 