Search found 4281 matches

by methods
Nov 13 2019 3:10pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 744
Views: 173992

Re: Electric Surf Board

Epic project! You are literally "Living my Dream" right now. Thanks for posting pics. . . that is about what I pictured... but you got a lot farther into the project over the years. ... I can tell that I am going to need some support that exceeds my current fab skills/resources. - It has got to be l...
by methods
Nov 13 2019 3:03pm
Forum: Electric Watercraft
Topic: Ekayak first project
Replies: 3
Views: 248

Re: Ekayak first project

That is rad. 154570121000893-768x432.jpg Coming from the gas ethos it does not take long to realize the benefits of going electric. The noise The vibration The fumes The unreliability mk2-768x576.jpg Getting out of the Lead Acid and into Lithium brings whole new levels of satisfaction The weight The...
by methods
Nov 13 2019 11:45am
Forum: Battery Technology
Topic: Max safe Voltage Difference when connecting two Batteries in parallel
Replies: 54
Views: 1300

Re: Max safe Voltage Difference when connecting two Batteries in parallel

It's a bit off-topic, but what I am curious to see would be a diagram how quick-charging affects cycle-life. Something like the following: The first graph using normal charging current (for GA: 0.3C), the second using quick charging current (for GA: 0.5C) and the third using an unhealthy quick char...
by methods
Nov 13 2019 11:31am
Forum: Items for Sale - New
Topic: FS:Tesla/VW/Outlander BMS Master
Replies: 6
Views: 1904

Re: FS:Tesla/VW/Outlander BMS Master

I too am very interested and would love it if anyone who has experience could post some thoughts and experiences.

I am expecting a rough edge or two. . . But it sure looks like an EPIC starting point for putting together a system of COTS parts.

-methods
by methods
Nov 12 2019 2:07pm
Forum: Motor Technology
Topic: Inside look at new 50h QSmotor V4 8000W 13" hub motor
Replies: 37
Views: 2290

Re: Inside look at new 50h QSmotor V4 8000W 13" hub motor

We never had any charts or Dyno info in the early days. We bought what we could, hooked it up to the most power we could muster, and rode them till they smoked. Along the way we learned a ton about spinning out drops, twisting axles, cooking halls, picking mosfets, and developing relationships with ...
by methods
Nov 12 2019 1:53pm
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 936

Re: 1988 Honda Prelude conversion - fastest build log ever.

Wow. . . I dont think folks have any idea how Valuable of a contribution it is to share this kind of stuff. I have seen millions blown just in finding the lessons in the paragraph above. Thanks man :wink: ... Any College folks building a rig would be WISE to take the time to understand the Who-What-...
by methods
Nov 12 2019 1:49pm
Forum: Battery Technology
Topic: Max safe Voltage Difference when connecting two Batteries in parallel
Replies: 54
Views: 1300

Re: Max safe Voltage Difference when connecting two Batteries in parallel

Your not listening and I dont really like your style flippy. I am still glad you are here. :D Try to understand that some of us are talking about setting up tests to debunk incorrect theory. What you are doing right now is being a "Well Meaning Alarmist" with talk of fires. I am not being condescend...
by methods
Nov 12 2019 1:40pm
Forum: Motor Technology
Topic: 75-5 & 75-7 Motors - Looking for Test Engineers
Replies: 59
Views: 8527

Re: 75-5 & 75-7 Motors - Looking for Test Engineers

If they exist you contact Craig at Calfee Design. It has been a while and the last time I was there Craig was well into some functioning Proofs of Concept so. . . I dont know. A lot of the desired data was collected thru Kart Racing - just FYI. I saw gobs of track data that really stressed the setup...
by methods
Nov 11 2019 1:30am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 936

Re: 1988 Honda Prelude conversion - fastest build log ever.

https://endless-sphere.com/forums/download/file.php?id=261853 Could you share more about how you seal off the pack? I see a lot of bare copper. Are you using grease? Do you use any descant? Are there weep holes? Is there a membrane, or if it is vented how do you manage moisture collection while the...
by methods
Nov 11 2019 1:25am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 936

Re: 1988 Honda Prelude conversion - fastest build log ever.

https://endless-sphere.com/forums/download/file.php?id=261854 Are you using the internally shielded wire (for example 2AWG with a shield built in) Or are you using something more like Welding Cable? Tinned or bare copper? Do you get any noise or interference with your Radio, Cell phone, or other? -...
by methods
Nov 11 2019 1:23am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 936

Re: 1988 Honda Prelude conversion - fastest build log ever.

Thanks for sharing! I need to build another chiller (larger Cold Water Reef Tank) and I need it to have 100% up time. I am thinking of building it from a pull-down EV Air Conditioner, Powering it from a low capacity, high voltage pack, And pass-thru running it daily off of a Charger Totally impracti...
by methods
Nov 10 2019 2:46pm
Forum: Food and Drink
Topic: Beer suggestions!
Replies: 49
Views: 3569

Re: Beer suggestions!

Lol Beer is an alcohol carrier. At best it is a collection of impurities. The purpose of drinking beer is to feel the buzz of Alcohol change the perceptions. Vodka is the best beer. Mix it with Cranberry and it tastes wonderful. ... To contradict that... Coffee is simply a caffeine carrier Cigarette...
by methods
Nov 10 2019 2:13pm
Forum: Technical Reference Area
Topic: Using EV Chargers
Replies: 97
Views: 5775

Re: Using EV Chargers

Requirements: 1) The output of the 10KW brick shall be Fixed DC Voltage and not Variable Rational: It is much easier, cheaper, and more compact to make a small range, fixed CV. Reference Meanwell. 2) The output of the 10KW brick shall be standard CC/CV. The CV is fixed while the CC is variable. Rati...
by methods
Nov 10 2019 1:59pm
Forum: Technical Reference Area
Topic: Using EV Chargers
Replies: 97
Views: 5775

Re: Using EV Chargers

When trying to solve REALLY BIG riddles sometimes the best thing to do is Deep Dive and then Walk Away. Walk away for an hour Walk away for a day Walk away for a week Walk away for a month Walk away for a year Bigger the problem Longer the time you spend reflecting ... During this reflection period ...
by methods
Nov 10 2019 11:18am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 936

Re: 1988 Honda Prelude conversion - fastest build log ever.

I would be interested in hearing the AC Install side notes. Automotive A/C is almost accessible to the DIY-GUY... with the less-gnarly refrigerant kits available at any Auto Parts store. High Pressure side Low Pressure side Pair of gauges Can of juice For Home Refrigerant the industry is in LOCKDOWN...
by methods
Nov 10 2019 11:10am
Forum: Food and Drink
Topic: Cured my wife's anxiety and my depression with nutritional supplements.
Replies: 18
Views: 499

Re: Cured my wife's anxiety and my depression with nutritional supplements.

Hummina Shadeeba wrote:
Nov 08 2019 10:23pm
... I was with three women and they though my endurance was fantastic. Not really but it couldve happened
Lol

-methods
by methods
Nov 09 2019 8:17am
Forum: Food and Drink
Topic: Beer suggestions!
Replies: 49
Views: 3569

Re: Beer suggestions!

Yes -
Hence why I like Nitrogen beer. :)

-methods
by methods
Nov 08 2019 1:44pm
Forum: Food and Drink
Topic: Cured my wife's anxiety and my depression with nutritional supplements.
Replies: 18
Views: 499

Re: Cured my wife's anxiety and my depression with nutritional supplements.

At my lowest point in life... Living in Livermore California... Building WMD's for the MIC.... One of my mentors basically told me to "get some pills, take them, put in your 30 years, and retire" (sigh...) Lexapro - Only made it 30 days and it caused me to not be able to ejaculate. Perma-half-boner ...
by methods
Nov 08 2019 12:39pm
Forum: Items for Sale - New
Topic: FS:Tesla/VW/Outlander BMS Master
Replies: 6
Views: 1904

Re: FS:Tesla/VW/Outlander BMS Master

I just pulled his codes. . . This guy is a hero :o Somebody hire this guy - quick . We need to import him into the US. Set him up in the bay area with a nice $350k salary and some seed money. This is by far the most valuable, Individual Contribution, I have ever seen to the Revolution. I am not joki...
by methods
Nov 08 2019 12:28pm
Forum: Items for Sale - New
Topic: FS:Tesla/VW/Outlander BMS Master
Replies: 6
Views: 1904

Re: FS:Tesla/VW/Outlander BMS Master

Back to the top. First I have seen of this MOST EXCELLENT WORK I was thinking about laying down to just die out of morbid-non-curiosity. . . then... I saw this post. :bigthumb: https://www.tesla.com/blog/all-our-patent-are-belong-you Building up a generic BMS master than can work with slaves from mu...
by methods
Nov 08 2019 11:30am
Forum: Battery Technology
Topic: Super Capacitors for "Burst Mode"?
Replies: 27
Views: 529

Re: Super Capacitors for "Burst Mode"?

Who has performed the following experiment and recorded the results? 100V 10Ah of 1C or otherwise low quality lithium parallel with 100V 1Ah of 50C lithium parallel with Extended capacitor bank external to the controller There is zero doubt that you can stiffen up the leading edge of your power curv...
by methods
Nov 08 2019 11:20am
Forum: Battery Technology
Topic: Max safe Voltage Difference when connecting two Batteries in parallel
Replies: 54
Views: 1300

Re: Max safe Voltage Difference when connecting two Batteries in parallel

flippy is in straight up "Vendor Mode" I clearly described an experiment that would put to rest any questions about how much current flows between two packs when you hook them in parallel. I described it using a large resistor for easy measurement with any DMM in a low risk configuration I indicated...
by methods
Nov 08 2019 11:13am
Forum: Battery Technology
Topic: Recommend smart BMS under 100.00 for 14s Tesla 2170 cells...
Replies: 5
Views: 202

Re: Recommend smart BMS under 100.00 for 14s Tesla 2170 cells...

He is on to it. ... To try and provide a hack solution: Since OP is only building a 14S pack he could grab any of the standard EBIKE BMS's. If he needs to drive more current than the mosfets are rated for he could use the mosfets to control contactors. Lots of hacky things that can be done. Anything...
by methods
Nov 08 2019 11:02am
Forum: Food and Drink
Topic: Cured my wife's anxiety and my depression with nutritional supplements.
Replies: 18
Views: 499

Re: Cured my wife's anxiety and my depression with nutritional supplements.

... So kiss that beach sand and tell it i say hi and i miss it.. ... ... I write code for a living, so i need sleep otherwise i can't work. ... IE, respect yourself enough to take care of yourself, right? :lol: ... Will do When I spent 10 years away from the Ocean it was a real bad trip. ... I hear...
by methods
Nov 08 2019 3:29am
Forum: Battery Technology
Topic: Recommend smart BMS under 100.00 for 14s Tesla 2170 cells...
Replies: 5
Views: 202

Re: Recommend smart BMS under 100.00 for 14s Tesla 2170 cells...

Standard CAN protocol COB ID and all that reading up on CAN OPEN will allow you to match the patterns you see Look at the uControllers used and the year the part was introduced. Look at the programming languages used then Look at the capabilities of the chips (original data sheets) to get the valid ...