Latching Relay Based Main Switch ( in lieu of electronic anti-spark switch)

ESK8 Electronics
21

nah - that’s an XT-60 with a main 40A fuse and I also use it to totally isolate battery pack when required.
There is a black cover to go over this to make it look nice!

22

Just an update - latching relay main switch has been in service now for about 4 months with about 350 operations without any issues. Been on some pretty rough tracks in that time. Operation has been flawless from the beginning.

I think the current success of this trial is due to:

  • Having a mechanically latched system with momentary push-buttons for control - both open and close

  • Having a beefy large contact area contact for the making duty.

Cheers

4 Likes
23

I recently reviewed this thread and @darkkevind’s thread. I’m gonna give this a crack. But I’m looking at the 10s-13s range for voltage, and lotta amps. I know this particular build was just for 40a max, so I’ll see what I can find for relays.

Thanks again for posting this stuff.

24

@deucesdown - thanks for your post. AliExpress do a 100A latching relay which should do for most eboard applications . (I think @darkkevind runs with this relay) My latching relay was 80A rated for AC ( but on most rides I peak at 40/50A battery current with an average around 15A)
Are you running dual vescs?
Cheers

https://www.aliexpress.com/item/12V-Magnetic-Latching-Relay-100A-with-Copper-Braided/924140636.html?spm=2114.search0104.3.44.1d767833iK59iA&ws_ab_test=searchweb0_0,searchweb201602_1_5724111_10065_10068_10130_10547_5724211_10548_5890011_5724311_10696_5724011_10084_10083_10618_5970011_10307_10131_10132_10133_5910011_10059_100031_10103_5725011_5990011_5724911_5980011,searchweb201603_55,ppcSwitch_5&algo_expid=4df173ad-b182-40a3-96e1-abedc2c349b0-6&algo_pvid=4df173ad-b182-40a3-96e1-abedc2c349b0&priceBeautifyAB=0

1 Like
25

Hi, I really like your start setup but I think you are missing something like this: jpg_640x640

:slight_smile:

2 Likes
26

your right -good idea -will use in next build

BTW latching relay is still performing faultlessly

Two fellow local DIYers had anti-spark switches fail closed in last week( after about 6 months in service)

2 Likes
27

Hi, going to a little extreme, I found another fine switch to use in a electric longboard. A car battery switch that can be pulled off. I really like this one:

1d8d5e82-ff3d-4309-9dbb-2c77626b8b9d

It can be bought here: https://www.ebay.com/itm/CAR-BATTERY-POWER-SWITCH-MAX-50V-DC-50A-CONT-75A-INT/183030387127?hash=item2a9d7611b7:g:ykMAAOSw8-FaZSHm:rk:6:pf:0

1 Like
28

@sismeiro The ASS fanboy Naysayers will say this will not work - but if it has hefty contact area and a positive closing action ( turning to on position) I think it should be fine .

2 Likes