Search found 83 matches

by Pete1961
Aug 12 2018 5:27pm
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 1774

Re: Series Parallel Battery & Open voltage controller

Regarding the series - parallel, shift on the fly idea, it occurred to me that a large geared hub motor with freewheel clutch may be a better candidate for this as no back drive from the road wheels to keep back emf feeding into controller. An idea like the 'tacho generator' that monitors an AC wash...
by Pete1961
Jul 26 2018 6:05pm
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 1774

Re: Series Parallel Battery & Open voltage controller

Thanks bionx, will study further when I have more time, seems there are many Sony Konion types. eu.nkon.nl/rechargeable/18650-size.html I am amazed they can run successfully with no BMS
Have bought Panasonic NCR18650PF from above.
by Pete1961
Jul 25 2018 5:27am
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 1774

Re: Series Parallel Battery & Open voltage controller

A lot of good thoughts here, thanks. Sorry in the delay - internet has been down in my area. It seems that the 'shift on the fly' concept is the most difficult part to achieve. There have it seems been other attempts at these 'reverse trikes' BUT the main problem in my area is the transition period ...
by Pete1961
Jul 21 2018 7:30pm
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 1774

Re: Series Parallel Battery & Open voltage controller

Interesting, bionix 1954, you have done the set up. I wonder what the 'c' rate of the Bosch battery is? I presume there is no problem in seriesing up the two Bosch BMS controlled batts (I was told that two BMS controlled batts should not be put in series). I am thinking that 40A can be happily pulle...
by Pete1961
Jul 21 2018 1:26pm
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 1774

Re: Series Parallel Battery & Open voltage controller

Only advantage I see is cost, a 72v 30A battery would be more costly than two 36v 15A. It was a cheapness idea to get both high amps when needed & higher cruising speed when on the flat. I have found that a motor only draws about 6A @ nom 36v on the flat once up to speed pulling a 200 Lb rider & 40L...
by Pete1961
Jul 21 2018 7:37am
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 1774

Series Parallel Battery & Open voltage controller

As more amps = more torque & more volts = more speed, I came across an 'open voltage controller' - I thought of this, two nom 36v batts @ 15A max each, to be connected via relays either in series or parallel to give 72v @ 15A for high speed on the flat or 36v @ 30A for serious hill climbs. I can see...
by Pete1961
Jul 21 2018 7:16am
Forum: Motor Technology
Topic: Crystalyte 408 w water damage - advice req
Replies: 4
Views: 586

Re: Crystalyte 408 w water damage - advice req

Is it water damage, or has the motor been overheated at some time, thus melting the insulation? You should read about the same ohms value across any two of the three heavy phase wires, & no circuit to the metalwork from any phase. Also you might smell a burned motor smell from it. If the motor is OK...
by Pete1961
Jul 21 2018 6:45am
Forum: Battery Technology
Topic: Battery not charging, charger shuts off. help please
Replies: 13
Views: 797

Re: Battery not charging, charger shuts off. help please

I have had this problem a couple of times, ie battery will run the bike but not accept charge afterwards. Both times it proved to be one of the little positive multi plug wires detaching from its cell. To best detect this I removed the multi plug from the BMS. I taped a sewing needle to the pos prob...
by Pete1961
Jul 03 2018 6:41pm
Forum: Motor Technology
Topic: Old 408 Motor, Max Amps it can take?
Replies: 8
Views: 699

Re: Old 408 Motor, Max Amps it can take?

Sadly no, mine is an old model with much thinner wires, I am probably going to wait for the Lebroski sensorless as it seems promising. Probably going with the Golden 409 clone at first on this. I also have an old British TGA crank drive (built into an identical 20'' folder as the Golden hub bike, bo...
by Pete1961
Jun 29 2018 5:22am
Forum: Motor Technology
Topic: Old 408 Motor, Max Amps it can take?
Replies: 8
Views: 699

Re: Old 408 Motor, Max Amps it can take?

Thanks skeetab, would this conversion table http://tuxgraphics.org/~guido/javascript/awg.html be right in giving me the sizes & metric equivalents of the AWG sizes you recommend? Oddly enough the one you say to use is the one xlyte now use in the 408 but in metric (2.5mm CSA) I have had the HBM 36 o...
by Pete1961
Jun 28 2018 6:53am
Forum: Motor Technology
Topic: Old 408 Motor, Max Amps it can take?
Replies: 8
Views: 699

Re: Old 408 Motor, Max Amps it can take?

Thanks for the interest, I will likely include the digital thermometer - I have one somewhere - this really only possible if I replace the feed wires. Am I on the right track going sensorless to allow thicker single insulated phase wires? What max temp should I aim to stay below? I have found an old...
by Pete1961
Jun 27 2018 6:21am
Forum: Motor Technology
Topic: Old 408 Motor, Max Amps it can take?
Replies: 8
Views: 699

Old 408 Motor, Max Amps it can take?

I have a 408 in a 20'' wheel lying around. Dates from about 07 but little used. It is in its basic set up with factory 9 wire feed cable. Reading that he newer 408's can take many more amps & produce more torque I am wondering if the old and new models are similar inside. I see the motor phase wires...
by Pete1961
May 18 2015 4:04pm
Forum: Motor Technology
Topic: Low KV Q128H at ridiculously high voltage? Which one (Alps)?
Replies: 26
Views: 6417

Re: Low KV Q128H at ridiculously high voltage? Which one (Al

It might be just my settings but I cannot get the details to open on the Adana site, See from the company news they have a 100Nm motor. Also that this company mentions a 800 to 1200W motor with a 1600 - 2400W motor under development (think it is brushless gearless aimed at the scooter market) http:/...
by Pete1961
May 06 2015 11:38am
Forum: Items for Sale - New
Topic: JP spot welder
Replies: 1242
Views: 189905

Re: JP spot welder

Thanks for the video, very instructive in how to use. I am still interested but recovering from being Knocked off my bike two days ago!!
Would surface shipping be any cheaper for sending the spot welders within the EU? - If a bit slower
by Pete1961
May 02 2015 4:45am
Forum: Items for Sale - New
Topic: JP spot welder
Replies: 1242
Views: 189905

Re: JP spot welder

No worries then re hydrogen. Thanks, I have two more questions:- Can this weld 26650 cells & 36650 cells - if they become a good option re the improvements in performance that 18650 cells have seen ( I am thinking of the lower internal resistance of a bigger cell??) Also can it weld NiMh NiCd & NiZn...
by Pete1961
May 01 2015 6:31pm
Forum: Items for Sale - New
Topic: JP spot welder
Replies: 1242
Views: 189905

Re: JP spot welder

I am most interested in the spot welder (& look forward to the training video as this is new to me) One thing does worry me slightly, the evolution of Hydrogen gas within the automotive battery. Granted this is at its worst during charging (& indeed overcharging!) but I read from this that both H2 &...
by Pete1961
Mar 14 2015 2:47pm
Forum: Battery Technology
Topic: Bestechpower BMS
Replies: 222
Views: 36882

Re: Bestechpower BMS

Thanks guys, I really wanted confirmation that the bms was as I thought. I had traced the sense wire from cell to its resistor but could not go further. I am only an electrician / wireman, not an electronics guy. I have as yet no price from BesTech but believe two boards may be the min order. I am i...
by Pete1961
Mar 13 2015 1:38pm
Forum: Battery Technology
Topic: Bestechpower BMS
Replies: 222
Views: 36882

Re: Bestechpower BMS

Attached is info & wiring diagram on the Bestech 10S li ion D178 bms . I did ask if it is of the shunting type, Ada Li asked for clarification on what shunting type meant. I fear my answer has only confused the issue further. Could anyone on here confirm the type of bms (I guessed shunting from the ...
by Pete1961
Mar 05 2015 8:41pm
Forum: Battery Technology
Topic: Shunting Vs Smart BMS? Budget 18650 Build
Replies: 3
Views: 872

Re: Shunting Vs Smart BMS? Budget 18650 Build

Thanks, Nobuo
It is the BMS that Ping uses, the LED's are just what I want, & others say it helps with fault finding. I will be going with the 10s li ion version of the board
by Pete1961
Mar 01 2015 1:16pm
Forum: Battery Technology
Topic: Shunting Vs Smart BMS? Budget 18650 Build
Replies: 3
Views: 872

Shunting Vs Smart BMS? Budget 18650 Build

I am looking for as simple & reliable a BMS as possible for a build using 18650 cells. I read of the Clean Power LLC BMS & would like something similar ideally with the LED to report when each cell or parallel group of cells is shunting (thus if a group cannot reach shunting voltage then that is a p...
by Pete1961
Feb 22 2015 12:31pm
Forum: Battery Technology
Topic: Bestechpower BMS
Replies: 222
Views: 36882

Re: Bestechpower BMS

Has anyone used the Bestech D178 shunting bms http://www.bestechpower.com/37v10spcmbmspcbforli-ionli-polymerbatterypack/PCM-D178.html I am planning a build using Panasonic NCR 18650PF batts 3P10S or possibly 4P10S. This will be only my second pack build (first was 7070260 LiPo4 & a smart bms, all su...
by Pete1961
Sep 15 2014 2:14pm
Forum: EV Business World
Topic: Big Batteries to Boost the Electric Grid
Replies: 4
Views: 1158

Re: Big Batteries to Boost the Electric Grid

I understand that huge semi liquid Ni Zn batteries are in use expermentally for grid storage, a pump constantly circulates the electrolyte to prevent dendrite crystals forming in the batt. The chemicals for the NiZn batt are much more freely available than lithium would be, & there is a virtually un...
by Pete1961
Sep 15 2014 12:15pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My & Wifes bikes
Replies: 1
Views: 571

Re: My & Wifes bikes

Other two are crank drive 20'' by UK company TGA, & Little stinker 2 Cycle Russian petrol motor (I machined rear sprocket set up myself from plate wheel & added my own tank & silencer (muffler). sadly worst bike is the crank drive as always in trouble & 50% loss of motive power throu worm primary
by Pete1961
Sep 15 2014 12:08pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My & Wifes bikes
Replies: 1
Views: 571

My & Wifes bikes

My main bikes, first is 20'' folder with Golden HBM / small magic pie motor & home made 36v lipo4 pack, Second is 26'' with Q100 rear & Tongxin 175 rpm front (50+Nm if both running, & Lipo added)
by Pete1961
Sep 15 2014 10:53am
Forum: EV Business World
Topic: Express Rail Freight China to Europe
Replies: 0
Views: 729

Express Rail Freight China to Europe

I read of a weekly container rail freight from Chengzhu to a European distribution hub, UPS & DHL are involved, said to be 50 to 70% cheaper than by air, journey takes two weeks. Could this be a good way of importing Lithium cells or batts at a better price? I have been on SLA on cost grounds but re...