The making of the BLF UC4 charger: the start of a new venture, INTEREST LIST, UPDATE 7 (Well, ramping stopped :/ )

Long way away from starting production.

It is being researched and developed, not produced. And currently there is a delay, but we expect the project to continue. There is no estimated ship or even production/prototyping date yet.

Interested in 1

Does it have a fan for cooling? Then I hope it is easily replaceable, unfasten a few screws and unplug, as this is the most likely troublemaker. Also possible a flashing port.

Put me in for 1.

I would like to get in on this as well. Thank you!

Have you tried pushing the slider terminal with the cell you’re inserting? That’s how I always do it. I haven’t touched a terminal in ages.

interested

Interested!!!

Perhaps something similar to a shooter rod on a pinball machine. Or something as simple as making the negative tab tall enough to provide a leverage point to grab, pull back the slider, insert the cell, and then gently release. Even simply choosing springs with less force; they only need to be secure, not act as a vice.

Relying on the cell at act as the lever, or shoehorn, of sorts, is less than optimal, and I hate the crude execution used by most, if not all chargers in general.

There are many more elegant ways to approach it, but the status quo is cheap.

Interested!

Interested in 2, thanks.

I like the constant current modes. Interested. Thanks.

Could updates in post 1 be dated going forward?

slmjim

I had a feeling that this would happen. While i admire how inclusive you guys have been regarding the design of this charger, it apparently has fallen victim to the old adage… “Too many cooks in the kitchen”. There comes a time when the people in charge need to take the initiative and stop trying to be all to all people and get things done.

Feature creep kills products, especially those that actually make it to market. Keep the essential features missing from most other chargers, dump the rest. To me, that means keep polarity protection, the multi-chemistry compatibility (but for NiZn, a boutique feature few will use, plenty of NiZn chargers out there), keep the resistance testing, the constant current charging modes, but bail on some of the adjustable charging, 0.03A – 0.05A – 0.08A?? Why. I also don’t believe active cooling is necessary, nor a Li-ion storage charging feature, which is redundant if it supports LiFePO4, just charge Li-ion to that 3.7V and store.

But what do I know?

Sign me up for 2 please.

Count me in for 1 please

Actually, BlueSwordM seems to have a good idea of what he’s doing. The only thing it’s “fallen victim” to is delays, which are understandable given that he’s largely doing the project alone (and also had a recent injury).

Never did this. I push the negative terminal back with the battery (Lii-500).