Battery mounting (Hailong)

[cubegame]

Hi all.

I'm in the process of converting my OHs bike as a Xmas present.

It's a Specialized hard tail and I've hit an issue with mounting the battery on top of the downtube.

There's enough space for the battery but not quite enough clearance to position it to slide onto the mount.

Any ideas in what the best option would be? Is there any mods that will help or is it best to look at mounting under the downtube instead?

 

[Woosh]

Can you post some pictures?

 

[RollingChunder]

Hi all.

I'm in the process of converting my OHs bike as a Xmas present.

It's a Specialized hard tail and I've hit an issue with mounting the battery on top of the downtube.

There's enough space for the battery but not quite enough clearance to position it to slide onto the mount.

Any ideas in what the best option would be? Is there any mods that will help or is it best to look at mounting under the downtube instead?

I have the same issue. It would be great if there was some base plate mounting solution that rotated around the downtube to be able to slide the battery in the side position and rotate back into the top position. Seems niche but there's a surprising number of posts with batteries that fit on top of the downtube but not enough room to slide in and out.

Anyway, my two realistic options are buy a rear rack and mount it there, or mount as far back on top of the top tube with rivnuts. I think I will go with top tube and live with the higher CG.

 

[saneagle]

Buy or make your own version of one of these. Fix the hailong base to it. Lock the battery to it, then strap the whole assembly to the frame. You'll have to charge the battery on the bike. At least nobody will be able to nick the battery. Make sure you use decent quality clips because the cheap ones can snap under impact or for other reasons.

E-bike Battery Bottom Base Mount Plate Bracket Holder For HAILONG POLLY SU | eBay

Net weight of bracket: 115g. Material: Aluminum alloy 6061. Product set net weight: 310g. 5, 3mm hexagonal tool 1.

www.ebay.co.uk

 

[cubegame]

Thanks for the replies so far.

Charging the battery on the bike might not be all that practical......but I'll think about it.

I might look at the top tube as I've the got rivnuts already as I was going to add extra mounts to the downtube.

In fact, I'm currently restricting myself to using the existing bottle mounts so it could just be a simple case of not using those......

 

[RollingChunder]

Thanks for the replies so far.

Charging the battery on the bike might not be all that practical......but I'll think about it.

I might look at the top tube as I've the got rivnuts already as I was going to add extra mounts to the downtube.

In fact, I'm currently restricting myself to using the existing bottle mounts so it could just be a simple case of not using those......

Oh if you've got space but it just doesn't line up with bottle mounts it's a no brainer. Bottle mounts will be soft aluminium anyway much better to drill new holes and fill with steel rivnuts. Assuming you've got stainless rivnuts?

If it's a nice clean hole with stainless rivnut it will add strength to the ally frame not detract.

Buy or make your own version of one of these. Fix the hailong base to it. Lock the battery to it, then strap the whole assembly to the frame. You'll have to charge the battery on the bike. At least nobody will be able to nick the battery. Make sure you use decent quality clips because the cheap ones can snap under impact or for other reasons.

E-bike Battery Bottom Base Mount Plate Bracket Holder For HAILONG POLLY SU | eBay

Net weight of bracket: 115g. Material: Aluminum alloy 6061. Product set net weight: 310g. 5, 3mm hexagonal tool 1.

www.ebay.co.uk

It's a nice idea but I'd rather not strap the battery to the frame, if I were to do that I wouldn't need that extra plate I could just go around the whole downtube. Also the extra 10mm it adds to the height of the battery might mean it no longer fits at all. Plus, rivnuts look cleaner.

 

[cubegame]

I've got plated carbon steel rivnuts....my tool (or my hands) can't cope with stainless ones.

It will still be touch and go though...and the new holes may need to be very close.......opening the mounting slots on the battery mount may also be the better route.

 

[cyclebuddy]

It would be great if there was some base plate mounting solution that rotated around the downtube to be able to slide the battery in the side position and rotate back into the top position. Seems niche but there's a surprising number of posts with batteries that fit on top of the downtube but not enough room to slide in and out.

There are a few that do. Two of my e-bikes use batteries (different brands) that both unlock at the head and then pivot from the base of the bracket and are taken out sideways. People seem to mostly buy Hailong because they're generally cheaper than the alternatives.

 

[cubegame]

Cheap is why I bought a Hailong battery.

But where's the fun if you get it working first time?

 

[thelarkbox]

Fwiw i had a similar issue and have mounted a battery on the top of the top tube, The difference it makes to the centre of gravity of the bike is noticeable but not so much to be a determent once used to.

 

[Az.]

What is the planned use of this bike? Mounting battery so high will affect bike balance. I had similar problem and mounted battery at the rear rack, but wasn't happy, so I moved it to downtube eventually.

 

[saneagle]

Mounting a Hailong type battery on the crossbar, under the downtube or on a rear rack, is generally a bad idea. Yes, it'll work, but your bike will be a bit on the unpleasant side. The cost of a reasonable used donor bike is pretty low compared with the cost of an ebike kit, so get a different donor if the one you have is no good. If you're going to spend all that money and do all the work, surely it's better to make something that you're going to be happy with.

 

[Saracen]

Like this


.

 

[cubegame]

After a good day of fettling I'm pleased to report success!

The battery did fit in the frame in the end.....although only with 3mm to spare....but that's enough to make it easy enough to get the battery in out.

I've got it powering a Tongsheng motor and that wasn't the easiest to fit either but I managed and I'm happy with the neatness of the cables etc.

I took it out for a spin myself (it's far to small for me so it looked like I'd nicked a kids MTB) and it was amazing....so much fun buzzing up our local hills....I'll be jealous once it's handed over!

 

[Az.]

I'll be jealous once it's handed over!

Nah... soon enough you will convert another bike for yourself. Mark my words.

And show us some pictures please. It would be rude not to