Hey Eric,
I'm not aware of any EV battery makers here in Canada. At least, not any legit ones. There are a few very speculative stocks that are in the space like ACDC and EFL but they are very volatile and are either pre-revenue (ACDC) or don't generate enough (EFL) to really be considered promising. I mean they are both very speculative and you can tell just by looking at their charts.
I'd say EFL is the more mature company and it did recently announce a battery supply agreement with Vicinity Motors but that is a small bus company at this point. I wouldn't necessarily invest in either of them at this point myself, simply because it doesn't fit within my risk profile. But if i was going to chose one, it would be EFL (Electrovaya). Just be prepared for BIG volatility and if you are lucky enough to get a run up, it is one I would definitely look at booking profits on early. Both of these are likely to move quickly in bullish and bearish environments.
Mat