Search found 148 matches

by francisco.shi
Today, 10:51
Forum: Batteries, charging, management and monitoring
Topic: Arduino BMS with unlimited everything
Replies: 6
Views: 2140

Re: Arduino BMS with unlimited everything

How long before you need the BMS?
I am starting on mine.
by francisco.shi
Fri, 19 Apr 2019, 13:10
Forum: Members Machines
Topic: quick question about temporary(test) batteries in an EV
Replies: 3
Views: 59

Re: quick question about temporary(test) batteries in an EV

If you were in Brisbane you could borrow one of my battery modules.
by francisco.shi
Fri, 19 Apr 2019, 08:57
Forum: Charging Infrastructure
Topic: Newbie question about practicalities of charging and range
Replies: 30
Views: 216

Re: Newbie question about practicalities of charging and range

I think the adoption of EVs will not be immediate it will be gradual. I think the political parties target of 50% EVs by 2030 is not difficult to achieve. They will be slowly increasing and as there is more demand on the grid the grid will be upgraded gradually, or perhaps people will start putting ...
by francisco.shi
Thu, 18 Apr 2019, 11:21
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 96
Views: 5956

Re: Francisco's Electric Pajero

The spacers on the half shafts are not the same as spacers on wheels. The spacers on wheels are a problem because the load is not centered on the bearings any more. For the spacers on the half shafts it is different because there is no side loads on the half shafts. Just the weight of the CV joints....
by francisco.shi
Wed, 17 Apr 2019, 21:59
Forum: Charging Infrastructure
Topic: Newbie question about practicalities of charging and range
Replies: 30
Views: 216

Re: Newbie question about practicalities of charging and range

Firstly for slow charging of cars at home the grid is already capable. An electric stove is on a 25A circuit. If you turn two hot plates at the same time that will be 5kw. Add to that another 3kw for the hot water and another 3 or 4kw for all the other things in the house. The grid has to supply thi...
by francisco.shi
Wed, 17 Apr 2019, 10:11
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 96
Views: 5956

Re: Francisco's Electric Pajero

Here are some more pictures.
20190416_224748.jpg
View from the back
20190416_224748.jpg (215.24 KiB) Viewed 105 times
20190417_100023.jpg
On trailer going to AEVA meeting tonight.
20190417_100023.jpg (215.04 KiB) Viewed 105 times
20190417_100054.jpg
20190417_100054.jpg (239.29 KiB) Viewed 105 times
by francisco.shi
Wed, 17 Apr 2019, 08:53
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 96
Views: 5956

Re: Francisco's Electric Pajero

Here are more pictures of the battery box with the motors mounted and with some of the braces installed. There are still about 5 more braces to go underneath. 20190416_220842.jpg 20190416_220852.jpg The front of the battery has braces attaching to the front suspension cross member. 20190416_220905.j...
by francisco.shi
Sun, 14 Apr 2019, 12:44
Forum: Batteries, charging, management and monitoring
Topic: Battery Modules Questions.
Replies: 33
Views: 993

Re: Battery Modules Questions.

I think you are right.
by francisco.shi
Sun, 14 Apr 2019, 09:27
Forum: Batteries, charging, management and monitoring
Topic: Battery Modules Questions.
Replies: 33
Views: 993

Re: Battery Modules Questions.

We can change a few things to make the cells fit. One is to change the manifolds so that they indent into the cell this would make the end tabs flush with the manifolds. Also we could make the cooling plates hold two cells instead of one. This would save over 12mm of width. I have a quick model of h...
by francisco.shi
Sat, 13 Apr 2019, 19:59
Forum: Batteries, charging, management and monitoring
Topic: Battery Modules Questions.
Replies: 33
Views: 993

Re: Battery Modules Questions.

Correct me if I am wrong but you have 218 cells at 3.2v. This equates to 700v. The ncms are 3.6v so you would need 194 cells. The current battery capacity is 40Ah at 700v so total of 28kwh. I can get 85cells in the 678x500x215 and 102 in the 1092x253x215 (Will need to make it slightly bigger but onl...
by francisco.shi
Sat, 13 Apr 2019, 19:16
Forum: Batteries, charging, management and monitoring
Topic: Battery Modules Questions.
Replies: 33
Views: 993

Re: Battery Modules Questions.

Thank you for the good report.
Can you tell me the size you have available?
If it is so close I may be able to modify something to make the batteries fit.
by francisco.shi
Fri, 12 Apr 2019, 18:47
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 96
Views: 5956

Re: Francisco's Electric Pajero

I have been a little busy so there has not been much progress lately. I have got the battery box almost finished. Unfortunately this is the prototype so I can find out everything wrong. The mounting brackets for the motor are in and welded to the box. I still need to finish welding the braces that h...
by francisco.shi
Fri, 05 Apr 2019, 13:37
Forum: Technical and conversion discussion
Topic: Hot rod EV - looking for advice.
Replies: 31
Views: 647

Re: Hot rod EV - looking for advice.

I made a webpage to work out acceleration and motor power.
You may like to play with it and see if it is useful
http://www.becman.com/MotorSport/index. ... calculator
I hope it helps.
by francisco.shi
Fri, 05 Apr 2019, 06:59
Forum: Technical and conversion discussion
Topic: Hot rod EV - looking for advice.
Replies: 31
Views: 647

Re: Hot rod EV - looking for advice.

Where did you get the model from?
Do you have a link?
by francisco.shi
Thu, 04 Apr 2019, 14:02
Forum: Technical and conversion discussion
Topic: Hot rod EV - looking for advice.
Replies: 31
Views: 647

Re: Hot rod EV - looking for advice.

What is your maximum. Desirable speed and what time do you want it to do 0 to 100kph.
This will determine how much power you need.
by francisco.shi
Thu, 04 Apr 2019, 12:33
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 249
Views: 15829

Re: Prelude conversion project - some questions

2 10A diodes in parallel do not give you 20A capacity. Diodes have a negative temperature coefficient. This means that as the diode gets hotter the forward voltage drop gets less. This means that of the two diodes takes slightly more current than the other which causes it to heat up more. This cause...
by francisco.shi
Wed, 03 Apr 2019, 20:41
Forum: Technical and conversion discussion
Topic: Hot rod EV - looking for advice.
Replies: 31
Views: 647

Re: Hot rod EV - looking for advice.

I am converting a Pajero which I think is about the same size and weight as your truck. The Pajero has independent front and rear suspension which makes it easier to connect the motors to the diffs because there is no need for a long tailshaft as the diffs don't move. This leaves more room for batte...
by francisco.shi
Wed, 03 Apr 2019, 19:59
Forum: For Sale/Wanted
Topic: Tesla for sale 30k jeg in gumtree
Replies: 20
Views: 747

Re: Tesla for sale 30k jeg in gumtree

My father used to buy damaged golfs fix them and sell them. This is what I know about the write offs. In Qld the determination if it was a write off is done by some inspectors at the Auction site. They look at the car and make a judgement if the car has been damaged enough to be a write off and if i...
by francisco.shi
Fri, 29 Mar 2019, 12:50
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 249
Views: 15829

Re: Prelude conversion project - some questions

That is for the left hand drive version :lol:
Ask for the right hand drive version. :lol:
I bet they didn't put on the drawing if it was the engine view or the gearbox view.
by francisco.shi
Thu, 28 Mar 2019, 15:29
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 249
Views: 15829

Re: Prelude conversion project - some questions

I may be able to help but I am in Brisbane. I can machine the flange and possibly cut external splines.
by francisco.shi
Fri, 22 Mar 2019, 11:34
Forum: Batteries, charging, management and monitoring
Topic: Battery Modules Questions.
Replies: 33
Views: 993

Re: Battery Modules Questions.

The battery box is 1900x1025x(210/160)mm. Total capacity is about 70kwh
by francisco.shi
Fri, 22 Mar 2019, 11:27
Forum: Batteries, charging, management and monitoring
Topic: EV BATTERY DISCUSSION AND SUGGESTIONS
Replies: 10
Views: 293

Re: EV BATTERY DISCUSSION AND SUGGESTIONS

The battery box is 1900x1025x(210/160)mm. Total capacity is about 70kwh.
by francisco.shi
Fri, 22 Mar 2019, 11:24
Forum: Batteries, charging, management and monitoring
Topic: EV BATTERY DISCUSSION AND SUGGESTIONS
Replies: 10
Views: 293

Re: EV BATTERY DISCUSSION AND SUGGESTIONS

The cooling system is part of the structure that holds the battery together so that saves weight by not needing the battery case to provide the support. It is also very light and strong because of the shape. Because the cells have the tabs on opposite ends I do not need to put a heavy copper bus bar...
by francisco.shi
Fri, 22 Mar 2019, 08:33
Forum: Batteries, charging, management and monitoring
Topic: EV BATTERY DISCUSSION AND SUGGESTIONS
Replies: 10
Views: 293

Re: EV BATTERY DISCUSSION AND SUGGESTIONS

If I use the 63Ah cells I get higher energy density than using the Tesla modules because the battery box is very light as it does not have to provide mechanical support for the battery pack. Also I can make the pack suit the space available. The 63Ah cells are new and the cooling system is far super...
by francisco.shi
Fri, 22 Mar 2019, 07:08
Forum: Batteries, charging, management and monitoring
Topic: EV BATTERY DISCUSSION AND SUGGESTIONS
Replies: 10
Views: 293

Re: EV BATTERY DISCUSSION AND SUGGESTIONS

How many kwh do you need? I am trying to get some people to do a group buy to get the price down for the freight. The cells I want to buy are 3.6v 63Ah. The price per cell from the supplier is US$45. I also have developed a cooling system and all the mounting hardware which I can sell to you as well...