third party chargers

Batteries, Chargers, and Battery Management Systems.
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justAddElectrons   1 µW

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Joined: Jan 26 2022 11:52am

third party chargers

Post by justAddElectrons » Jan 26 2022 12:29pm

hi,
This is my first post so I hope you'll go easy on me (not sure what kind of forum this is yet).
I spent a couple of hours researching this but came up empty so:

I am looking at a used 36V ebike battery pack for some projects (e.g. a hoverboard hack) but it has no charger.
The battery is this "California" "Advanced Electronics Energy Limited" "AEPCM100136V10AH000360" 36V:
https://ibb.co/r7c1qyV
https://ibb.co/qM5nYCM
https://ibb.co/60yzVwT

https://ibb.co/hYn1VDj
https://ibb.co/M1GvvVc

I found two chargers that seem to match in terms of voltage and the type of socket (I'm not sure if the socket is an exact match though):

"36V Charger 42V 2A electric bike lithium battery charger for 36V lithium battery pack with 3-Pin XLR Socket/connector"
~ $17 https://www.aliexpress.com/item/4000864496646.html

"XINMORE Charger 42V 5A Scooter Lithium Li-ion Battery Charger Bike AC-DC 36V 5A for Switch Bicycle Electric Tool XLB Plug"
~$30 https://www.aliexpress.com/item/32864407989.html

(I guess the used "California" battery pack I'm looking at is more likely XLR and not GX16-3 due to it not having a groove for the GX16 dimple)


1. Can anyone tell me if I will be able to charge that battery safely and without damaging it with both of those chargers listed above? (not sure which I'll get yet but I'd rather spend $17 than $30, although the faster 5A charge rate is attractive on the $30 one)

Does it matter which charger I get in terms of potentially damaging the battery pack? I watched an interesting video about charging lithium batteries and it mentioned that charging at too low a rate can massively reduce the number of charge cycles/lifetime for certain chemistries (https://youtu.be/pxP0Cu00sZs?t=1487) or if the charger has slightly too high upper cutoff voltage (https://www.youtube.com/watch?v=pxP0Cu00sZs&t=2151s), although maybe that's controlled by the battery pack internal BMS? I don't know.

2. Does anybody know what kind of socket that is on the battery pack output? Is it a standard or some impossible-to-find proprietary thing? Or what kind of hack/spade connector/etc. I could force into it to get power out (choosing a connector and cabling appropriately rated for the expected current)? Or maybe I should open up the pack and put in some other connector of my choice (if so, which one?))

99t4   10 kW

10 kW
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Joined: May 10 2020 10:31pm
Location: PNW

Re: third party chargers

Post by 99t4 » Jan 26 2022 3:02pm

justAddElectrons wrote:
Jan 26 2022 12:29pm
2. Does anybody know what kind of socket that is on the battery pack output? Is it a standard or some impossible-to-find proprietary thing? Or what kind of hack/spade connector/etc. I could force into it to get power out (choosing a connector and cabling appropriately rated for the expected current)? Or maybe I should open up the pack and put in some other connector of my choice (if so, which one?))
The round one sure looks like a common XLR connector, commonly used on battery charging ports.

Shown and described near the bottom of this helpful link:
https://ebikes.ca/learn/connectors.html

The other one (the discharge port you are asking about?) apparently comes up 404 Not Found? So I'm not able to view it.

docw009   1 MW

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Posts: 1713
Joined: Aug 02 2015 7:43am
Location: Chicago area suburbs.

Re: third party chargers

Post by docw009 » Jan 26 2022 7:57pm

All kinds of 2A 10S 42V chargers on ebay and amazon, if you're not looking to wait six weeks for aliexpress, especially with the New Year celebration and 2 week shutdown coming up next Month in CHina.

The XLR connector can take higher amps, but most of my batteries are 5mm barrel connectors, so I use 2 A chargers.

If you're looking for a 5A charger with metal box and fan, get one with trimpots so you have some freedom to adjust. The low cost models have no trim pots, and sometimes are off. I don't mind if they read low, but I won't use them if they read high.

velias   100 W

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Posts: 175
Joined: Aug 11 2008 12:49pm
Location: Reno, NV

Re: third party chargers

Post by velias » Feb 09 2022 4:01pm

Just buy a cycle satiator charger from Ebikes.ca, you can program it to what you would like.

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