Search found 185 matches

by francisco.shi
Yesterday, 11:22
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 4512

Re: Low Cost BMS for Home Storage Batteries

Is the oven for reflow?
I bought a similar oven and plan to use it as a reflow but not sure if it will damage the parts.
by francisco.shi
Sat, 13 Jul 2019, 03:21
Forum: Batteries, charging, management and monitoring
Topic: Disposing of old lithium batteries
Replies: 8
Views: 133

Re: Disposing of old lithium batteries

Currently in Australia we can not recycle lithium batteries. It goes like this: We used to collect them and send them overseas for recycling. Then some time ago some ships carrying lithium batteries caught fire. After that no-one wants to carry the old cells because of the fire danger. After that we...
by francisco.shi
Tue, 02 Jul 2019, 11:51
Forum: Batteries, charging, management and monitoring
Topic: PV diversion EV charger
Replies: 10
Views: 1133

Re: PV diversion EV charger

So you want to get a solar inverter-charger that expects a 400 V battery, but doesn't have one built-in? And use the car, when it's home, as the inverter's battery. I'm not aware of any such inverter-chargers, but I haven't been looking for them. Many inverter-chargers work with an internal 400 V b...
by francisco.shi
Tue, 02 Jul 2019, 07:02
Forum: Batteries, charging, management and monitoring
Topic: PV diversion EV charger
Replies: 10
Views: 1133

Re: PV diversion EV charger

I was looking for some information about what the cars do with the battery while charging. This is what I want to do: Get a hybrid inverter that runs with 400v batteries. I have heard the new Samsung or LG lithium battery inverters run of this voltage. Connect the car to the inverter thru the dc cha...
by francisco.shi
Thu, 27 Jun 2019, 08:08
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 309
Views: 20691

Re: Prelude conversion project - some questions

Could you put some thread inserts?
I am assuming the problem is you drilled the holes for the bolt size so now you can't put a thread on it?
by francisco.shi
Thu, 27 Jun 2019, 06:20
Forum: Nissan Leaf
Topic: Nissan Australia Leaf 1.0 battery replacement
Replies: 9
Views: 256

Re: Nissan Australia Leaf 1.0 battery replacement

In Australia there isn't anyone currently recycling Lithium battery packs. Also you are not allowed to export uncertified lithium batteries because of recent fires on container ships. That means that if you are not allowed to keep the pack in Australia it means Nissan is trying to keep the used pack...
by francisco.shi
Mon, 24 Jun 2019, 22:23
Forum: For Sale/Wanted
Topic: Looking for unicorn droppings, budget 6k.
Replies: 14
Views: 403

Re: Looking for unicorn droppings budget 6k

I just ordered the E63 cells for A$271/kwh. You could have got 22kwh. I can check if they have been sent if you are interested I may still be Ble to add them to the order.
by francisco.shi
Fri, 07 Jun 2019, 12:52
Forum: Electric motors and controllers
Topic: Schaeffler E-Drive
Replies: 6
Views: 285

Re: Schaeffler E-Drive

I have a motor with a 2.56:1 planetary gear box with built in inverter. It was designed to drive a right angle diff directly. The output of the motor is 260Nm peak and top speed 12000rpm. The output of the gearbox is 3000rpm @660 Nm peak. It will be too fast to drive the wheels directly but if you d...
by francisco.shi
Thu, 06 Jun 2019, 07:46
Forum: Electric motors and controllers
Topic: Schaeffler E-Drive
Replies: 6
Views: 285

Re: Schaeffler E-Drive

If you are interested in something a little simpler would you consider the motors and cells I am using?
by francisco.shi
Wed, 05 Jun 2019, 11:47
Forum: Technical and conversion discussion
Topic: Spec my powerplant: BMW E30 318is
Replies: 29
Views: 2292

Re: Spec my powerplant: BMW E30 318is

I will keep the pajero thread updated. If you are going to ask someone else to make the battery packs for you I can sell you the battery packs already assembled. I just need to know the dimensions. My battery packs are watercooled. The energy density is about 207wh/kg for the finished pack. All you ...
by francisco.shi
Fri, 31 May 2019, 19:46
Forum: Batteries, charging, management and monitoring
Topic: Battery Modules Questions.
Replies: 34
Views: 1733

Re: Battery Modules Questions.

I am about to order the E63 cells. A rough estimate on the price is US$42 per cell and about A$3.20 per cell for the freight with the current quantity. This is around U$180/kwh The exchange rate at the moment is 0.69 so including freight it would be around A$271/kwh. If anyone is interested in getti...
by francisco.shi
Fri, 31 May 2019, 19:44
Forum: Technical and conversion discussion
Topic: Spec my powerplant: BMW E30 318is
Replies: 29
Views: 2292

Re: Spec my powerplant: BMW E30 318is

The motor is 70kg with gearbox and inverter as a single unit. The gearbox is out of a Toyota prado transfer case. The ratio is 2.56. I think the pajeros have a 2:1 reducer. There may be other 4wds with a lower ratio but havent checked. The only problem is the gears may be different and would have to...
by francisco.shi
Fri, 31 May 2019, 10:50
Forum: Members Machines
Topic: Soyachips’ Electric FZR250
Replies: 33
Views: 1214

Re: Soyachips’ Electric FZR250

Is that after it is assembled with the bus bars and holder?
by francisco.shi
Fri, 31 May 2019, 07:32
Forum: Members Machines
Topic: Soyachips’ Electric FZR250
Replies: 33
Views: 1214

Re: Soyachips’ Electric FZR250

What is the energy density of the finished battery pack? (Wh/kg)
by francisco.shi
Thu, 30 May 2019, 19:37
Forum: Technical and conversion discussion
Topic: Spec my powerplant: BMW E30 318is
Replies: 29
Views: 2292

Re: Spec my powerplant: BMW E30 318is

Would you consider the motors I am using with the inline planetary gear box? It will give you about 660Nm out of the gear box. You can connect it directly to the rear diff with a cv joint. You can see some pictures of how it fits and how it looks on my conversion thread. (Francisco's electric Pajero...
by francisco.shi
Thu, 30 May 2019, 08:36
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 13
Views: 1026

Re: E63 LG 63Ah NCM battery group buy

I am about to order the E63 cells. A rough estimate on the price is US$42 per cell and about A$3.20 per cell for the freight with the current quantity. This is around U$180/kwh The exchange rate at the moment is 0.69 so including freight it would be around A$271/kwh. If anyone is interested in getti...
by francisco.shi
Mon, 27 May 2019, 07:19
Forum: Electric motors and controllers
Topic: Schaeffler E-Drive
Replies: 6
Views: 285

Re: Schaeffler E-Drive

What car are you planning to convert?
by francisco.shi
Sat, 18 May 2019, 11:35
Forum: Batteries, charging, management and monitoring
Topic: seeking advise - EV batteries oriented towards performance
Replies: 13
Views: 437

Re: seeking advise - EV batteries oriented towards performance

My Pajero will have 400kw ( 530hp) peak the battery pack will be 70kwh so at peak power it will draw 5.5C. I am not using it for racing so it is unlikely the cells will see much more than 2C peak during normal day to day. The cells weigh about 350kg. If I replaced them with the 30C cells I would onl...
by francisco.shi
Sat, 18 May 2019, 11:25
Forum: Batteries, charging, management and monitoring
Topic: seeking advise - EV batteries oriented towards performance
Replies: 13
Views: 437

Re: seeking advise - EV batteries oriented towards performance

High C cells tend to have shorter life especially if you run them hard. That is why Tesla has such big batteries for the higher performance models. The roadster has a very large battery for the size of the car so they can draw more power without reducing the life of the battery. When you choose the ...
by francisco.shi
Tue, 14 May 2019, 10:47
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 65
Views: 1604

Re: Offgrid solar project

You need to run the boost converter in a different way so that the draw current Does not overpower the cells.
Boost converters tend to be unstable when they get too close to 100% duty cycle.
by francisco.shi
Tue, 14 May 2019, 10:43
Forum: EV Racing
Topic: Electric Motorkhana and khanacross car
Replies: 49
Views: 6076

Re: Electric Motorkhana and khanacross car

Could you use regen braking to help the rear brakes?
by francisco.shi
Mon, 13 May 2019, 17:53
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 65
Views: 1604

Re: Offgrid solar project

To protect the output against failure in a buck converter you can use a crowbar circuit. It is basically an SCR that puts a short across the output if the voltage goes above a certain limit. This effectively blows the fuse.
by francisco.shi
Mon, 13 May 2019, 17:49
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 65
Views: 1604

Re: Offgrid solar project

There is a way to do that with an extra transistor and a few resistors to adjust the output voltage. I am just not sure if it can run up to 48v.
by francisco.shi
Sun, 12 May 2019, 22:40
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 103
Views: 7812

Re: Francisco's Electric Pajero

There is only about 5mm clearance between the chassis and the battery box so I need align the box to the chassis very accurately. The hoist has a pull down leavers to lower it but it is a little difficult to move it down slowly. Also the leaver is on the side of the hoist so I would have to move dow...
by francisco.shi
Sun, 12 May 2019, 20:40
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 103
Views: 7812

Re: Francisco's Electric Pajero

I thought about that but the problem is I can not control the down movement of the hoist accurately enough. The pack fits so tightly into the chassis of the car that I have to align it to the chassis as the battery goes in. Once it is in the right place then it is fine. To do that I need up/down acc...