7S charger

[Glen Beestone]

Can anyone recommend a charger that can balance charge a 7S Li-ion battery pack.


I have a turnigy accucell 6, but it will only balance charge 6sS packs maximum.


Something cheap as possible
it will not get a great deal of use. It will be used to occasionally check and balance out 24 volt packs from a DIY "powerwall" which will get their regular charge from a solar MPPT charge controller.

So this unit will just be for charging up new packs to go into the system and periodic "maintenance" on existing packs

Glen


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[John L Scott]

https://www.ebay.co.uk/itm/29-4V-2A-electric-bike-lithium-battery-charger-US-EU-for-24V-2A-battery-pac-YMK/313429711037?hash=item48f9ddd8bd:g:rmYAAOSwyhhfBuu0

any good?

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[Jon Davies]

Hi Everyone,

PSA: Glen mentions that the charger needs to balance the cells.  The type of charger needs to be one that has a cell balancing lead as well as a main charging lead. (Typically referred to as a 'smart charger').

Hi Glen,

As an alternative (some might perceive as sketchy, but I think you're game! :)), how about making up a 6S charge & balance lead for your battery, balance the first 6, then make another lead for the 7th cell and charge it individually on 1S?

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[Dan Nixon]

What is the battery for?

I often see the combination of BMS and active balancer used for larger cell counts (e.g. those used in EV and bulk storage).

Perhaps this might be appropriate?

I couldn't really offer any recommendations, but this type of hardware comes up quite a bit on https://www.youtube.com/channel/UCXJ7onrDcxo2zy8yAsxqwgg where some specific hardware and general installation/operation is shown.

Dan