[Batterypoweredtoad]

or horizontally, or on their sides, etc...?

Thanks,
Josh

Originally Posted by Batterypoweredtoad

or horizontally, or on their sides, etc...?

Thanks,
Josh

It's a vacuum sealed pouch. No avenue for leaking. Unless of course you bust the seal. I see no reason why not. We are going to mount fully on their flat sides. Protect them from chaffing and puncture.

[kerrymann]

I agree that there is little/no risk of leaking but I wonder about the anode and cathode configuration. For some of the larger prismatics it has be theorized that not mounting terminals up can reduce cycle life up to 60%. The general idea being the cathode could sag (Horizontal would be the worst). Like most DIY battery questions, I have not seen any hard data supporting this. I am planning on mounting mine up but I think there is a marginal saftey increase in having them upside down because of the decreased chance of dropping something on an open pack (like a wrench) and causing a short.

Sagging? No there is no place for them to sag, as they are encased in a plastic box for the TS style cells. Being upright would be the same as upside down except the tabs are facing down for the pouch cells. On the TS cells there is a gap between the inner pack and the top of the inside of the cell where electrolyte can accumulate. Sagging is not an issue if you mount those sideways or upright. Those are not supposed to be mounted upside down. There is no hard data on the vacuum packed and sealed pouch cells because there is no issue from what I see. You can make all sorts of claims but since they are vacuum packed and sealed there is no chance of sagging. Like all cells you need to support the cells no matter how you mount them.

Why do you want them upside down anyway? What is the issue that requires that sort of mounting?

Pete

[Batterypoweredtoad]

Originally Posted by gottdi

Why do you want them upside down anyway? What is the issue that requires that sort of mounting?

Pete

I'm not sure if you were talking to me or Kerryman, but I will answer . I was brainstorming a pack that involved the cells laying flat, tab to tab, and one tab offset, to make the series connection. The paralleled cells would be stacked. Going by what measurements I could find, the cells and tabs are almost perfectly spaced for this. Doing this I could design a 4P100S pack that is 36"Wx37"Lx6"H. Multiples of 18" wide by whatever length and height would be possible. This would make a nice underfloor pack possible in many vehicles. Your height is only determined by the thickness of how many you parallel and your associated hardware.

Originally Posted by Batterypoweredtoad

I'm not sure if you were talking to me or Kerryman, but I will answer . I was brainstorming a pack that involved the cells laying flat, tab to tab, and one tab offset, to make the series connection. The paralleled cells would be stacked. Going by what measurements I could find, the cells and tabs are almost perfectly spaced for this. Doing this I could design a 4P100S pack that is 36"Wx37"Lx6"H. Multiples of 18" wide by whatever length and height would be possible. This would make a nice underfloor pack possible in many vehicles. Your height is only determined by the thickness of how many you parallel and your associated hardware.

Kind of both. The flat pack situation is very possible with these cells. It is being developed as we speak exactly as you state by a few folks. I for one am working on a setup for a flat pack for the VW platform. My issue is keeping the cells from moving around. I still think they need a simple container to contain movement and to help give some added protection to the pouch both from chaffing and puncture. Beyond that I see no reason to have an extensive container except if your going to add an extra flat pan to the bottom of the vehicle. My idea is to build a flat chassis that will be the battery container and chassis of the vehicle. That way there is no extra pan sticking below the normal bottom of the vehicle. Sort of like Tesla but on a smaller scale. We can keep the center the same for the VW but build taller sides and internal floor which will house the cells on either side of the center where you need your shift rod anyway. We have a builder that builds custom chassis for the VW and it is nearly perfect for our needs except it needs to be a bit taller and for a full length VW instead of a Buggy.

So yes if you plan on placing them on the sides you can with no problem except keeping them from shifting around in the belly pan you create. So my protective covers will mount to the pan and enclose the cells tightly but it will all be accessible if needed to replace or repair any damage that may occur.

Pete

[Bowser330]

semi-off topic, is anyone finding places that sell the pouch/tap cells in modules, for those of us that cant deal with custom DIY busbar & screw mounts?

First we must find a suitable way to do that that will be safe and secure. Testing is in progress. It also depends upon what kind of setup and space requirements are needed. So each is truly custom. Until a basic form comes along your on your own. There are ideas but so far the standard TS style cells are what you have unless you want to experiment which is what we are all doing with the pouch cells. So far the flat pack is going to work well with few modifications. Making the connections is easy. A good vice, drill and hack saw will do as well as a good tap and of course a supply of material which is always available on ebay. Go for it. If yours is the best then you get to sell kits.

Pete

[Brute Force]

Bowser,

Like these?

http://www.youtube.com/watch?v=sAhLdCTq6vQ

I'm in negotiations...

Complex. That is not what we are trying to do. We want good but not complex. We want simple and safe and secure. Why go with the complex. It looks good but does it need to be like that?