Search found 10 matches

by sjd.aliyan
Aug 03 2018 2:22am
Forum: Battery Technology
Topic: Highest capacity 18650 cells
Replies: 68
Views: 6730

Re: Highest capacity 18650 cells

Why 18650? You can easily find high energy density prismatic cells. 18650 arnt most efficient in case of weight or volume Yes they are. With pouches you need heavy re-enforcement and you are stuck in having a fixed shape for starters. Second point is that pouches explode. Seems like you already kno...
by sjd.aliyan
Jul 29 2018 5:13am
Forum: Battery Technology
Topic: Any open source on-board chargers?
Replies: 0
Views: 181

Any open source on-board chargers?

Hi.
I'm looking for a open source (Hardware+software) on-board charger.
emotorwerks was open source years ago but they dont give a F about open source right now
by sjd.aliyan
Jul 29 2018 5:12am
Forum: Battery Technology
Topic: Highest capacity 18650 cells
Replies: 68
Views: 6730

Re: Highest capacity 18650 cells

Why 18650?
You can easily find high energy density prismatic cells.
18650 arnt most efficient in case of weight or volume
by sjd.aliyan
Jul 20 2018 1:31am
Forum: Battery Technology
Topic: Bad cell in parallel group - What will happen?
Replies: 6
Views: 478

Re: Bad cell in parallel group - What will happen?

You will lose one row of your series cells because that cell makes battery to loose some capacity and bms will cut the voltage
by sjd.aliyan
Feb 17 2018 12:18am
Forum: E-Vehicles General Discussion
Topic: Lithium batteries for Submarines
Replies: 18
Views: 1892

Re: Lithium batteries for Submarines

what you can do if they catch fire beneath the ocean?
by sjd.aliyan
Feb 17 2018 12:17am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 4907
Views: 188854

Re: Wind and Solar vs Coal, Gasoline, Nuclear

both renewable and fossil fuels/nuclears have benefits.what we can do?
by sjd.aliyan
Feb 17 2018 12:13am
Forum: E-Bike Technical
Topic: Is this controller salvagable?
Replies: 7
Views: 860

Re: Is this controller salvagable?

why are u doing this?put your life in danger.
by sjd.aliyan
Feb 17 2018 12:11am
Forum: Battery Technology
Topic: Tesla 18650 question
Replies: 16
Views: 1059

Re: Tesla 18650 question

Dude non-proper charging and discharging battery cells are not noticeable in short term other than making heat or reduced capacity.
Its better to use them with tesla bms itself.
by sjd.aliyan
Feb 16 2018 11:56pm
Forum: Battery Technology
Topic: Help me build 6s4p 18650 pack.
Replies: 2
Views: 501

Re: Help me build 6s4p 18650 pack.

Good luck without using bms
by sjd.aliyan
Feb 16 2018 12:52pm
Forum: Motor Technology
Topic: AC Induction Maximum Power/Weight Ratio
Replies: 0
Views: 391

AC Induction Maximum Power/Weight Ratio

Hi to all.
What is maximum power/weight ratio for an AC induction motor regardless to voltage and current and flux direction?