Re: [EVDL] 18650 cell level fuse wire

2019-01-21 Thread Justin Kenny via EV
I'm the owner of the Leaf Rex channel Cor mentioned earlier. I highly caution against using PCB fuses in general, I've done testing on those also: https://youtu.be/CMlpCX0bug8 If you have a relatively large open circuit voltage in the system you are trying to protect, it will create a conductive

Re: [EVDL] custom battery

2020-04-19 Thread Justin Kenny via EV
Well I assumed by disconnect you meant a manual one (e.g. big on/off switch), which would still have to take all the power required through it. That'd be the service disconnect I linked from EV West. The battery management system would control the contactor, which also switches all of the required

Re: [EVDL] Question about charging small LiIon batteries

2020-06-02 Thread Justin Kenny via EV
Suit yourself, I hope you are using protected 18650 cells. If not please use one of these to protect the batteries from overcharging/undervoltage: https://www.amazon.com/dp/B07KSPYMJ2 - Justin On Tue, Jun 2, 2020 at 3:58 PM wrote: > Yes, Lee has already pointed this out, so I am looking into

Re: [EVDL] Question about charging small LiIon batteries

2020-06-02 Thread Justin Kenny via EV
Not sure if you understood the previous 2 messages, the Zener diode will drain your battery, and a diode will not stop it from overcharging. I really suggest to use the right tool for the job, $3.25 for a constant-current constant-voltage converter isn't much cost to save your battery pack from

Re: [EVDL] Question about charging small LiIon batteries

2020-06-02 Thread Justin Kenny via EV
I've had pretty bad luck with MP2307 boards, a lot of them that I use are defective. The LM2596 boards I've used have all worked however, they use the much better 10-turn potentiometers. You could try and replace the variable resistor with your own potentiometer or fixed one, it is a bit of a

Re: [EVDL] EV Digest, Vol 105, Issue 7

2021-07-08 Thread Justin Kenny via EV
Autopilot will only safely bring you to a stop if autopilot can remain engaged according to its rules that entire time. If a driver engages autopilot, and the Tesla determines that it is a situation it can't handle (e.g. a sharp curve in the road), it will kick you out with very little warning. I

Re: [EVDL] EV Digest, Vol 106, Issue 27

2021-08-24 Thread Justin Kenny via EV
I would be curious to see some real world comparison/results doing a drive like that coasting as much as possible vs. using full regen. I used to drive a 2011 Leaf, and I struggled to get more than 4mi/kWH driving as efficiently as I could (minimizing regen by coasting) with no A/C, etc., yet now

Re: [EVDL] EV Digest, Vol 118, Issue 2

2022-08-16 Thread Justin Kenny via EV
The Tesla "FSD" computer is actually "dual redundant" as mentioned in this Tesla Autonomy Day clip from 3 years ago: https://youtu.be/Ucp0TTmvqOE?t=4648 However to your point, 2 is not enough; it's only enough to tell you *someone* is wrong, but not who. Hence why in my job with hardware testing