Professional VW van travelers experience solar battery fire while away...

softdown

This couple spent a few years traveling by van from Chile to the Prudhoe Bay, Alaska. While spending months away from the van, due to expired Visa, the lithium battery caught fire. The interior of the van was almost destroyed. 

Well done little amateur travel videos and 15 of them. Seems they lived off of Patreon donations from those who "lived the dream" vicariously. I am amazed when a couple is able to pull that off. Many try, no idea how many succeed. 

Wondering what probably caused the battery fire? Rodents caused a wiring short maybe? Rogue battery overcharged? CC malfunctioned? What say you? 

https://www.youtube.com/watch?v=PrGtMirXuCg

Photowhit

I may be a complete fool, but that looks like the early type 2a, with a <50hp motor, I can't image!

I had a 73 transporter with the 67 hp pancake motor, It was a bit under powered, at the same time I had a Yamaha XS750 Motorcycle that had more horsepower. Can't imagine tackling the Al-Can hwy.

Nothing to do with solar in the video, but thanks, @softdown for the trip down memory lane!

jonr

My guess: lack of a proper, per cell BMS.

softdown

Photowhit said:

I may be a complete fool, but that looks like the early type 2a, with a <50hp motor, I can't image!

I had a 73 transporter with the 67 hp pancake motor, It was a bit under powered, at the same time I had a Yamaha XS750 Motorcycle that had more horsepower. Can't imagine tackling the Al-Can hwy.

Nothing to do with solar in the video, but thanks, @softdown for the trip down memory lane!

It is a '92, he called it a POS many times. I think the motor was overhauled 8 times? He finally learned how to do it himself. On a 5 year trip, he spent about 1 year in mechanic's shops.

I love these videos. Turns out he saved money during his earlier job in IT. Was able to travel on just $10-15/day! Amazing. 
His voice inflection really never changes. Even when he describes watching an acquaintance getting shot and killed in front of his van. The Argentine police had an issue with the guy that he does not describe. 

softdown

This picture may help our detectives. Think a fuse in front of the positive terminal may have helped? I don't know if one was used. His father is an electrician by the way....I would assume that he has some knowledge in that area since he has worked for his dad. 

karrak

Looks like a DIY battery made from used 18650 Lithium Cobalt (LCO) batteries which are the most likely to catch fire.

I can't see any evidence of a BMS. It was also being charged via the solar panel while it was sitting for a long period of time.

These factors added together make it a recipe for a disaster.

Firstly, the fact that they are used cells probably from different computers, from different manufacturers and different ages and usage history means that they are more likely to go out of balance over time.

Secondly the fact that it was being charged on a daily basis via the solar panels probably without any loads on it would mean that the battery was at a high SOC most of the time which would have made the balance problems even worse.

Assuming the problem was not caused by an external or battery wiring short or a fault in the solar controller I think it is likely that the battery slowly went out balance over the months it was left standing on charge which would have meant  the voltage on some of the cells would have risen to dangerous levels which would have raised the temperature of those cells to the point where they caught fire.

If the battery had a BMS it would have stopped it being charged when it had gone too far out of balance and/or kept the battery in balance. Alternatively if the battery had been disconnected from any loads and the solar controller it would have been OK.

To me this is more evidence supporting the importance of having a BMS. There are billions of computers, power tools and other devices in use which use the most dangerous lithium ion batteries. The reason that these devices work safely and don't catch fire is that all these devices have a BMS of some sort keeping the battery safe.

Simon

softdown

^^^They bought this solar battery from a manufacturer. 

karrak

Well the "manufacturer" must have been some backyard operator who probably got the idea from looking at a Youtube video.

Just look at the "quality" of the solder joints and the different coloured batteries. If you get the same type of battery from the same manufacturer the will all be the same colour.

Simon

softdown

Can't argue with that. 

softdown

Appears that the lithium battery may have been home made by a DIYer in San Diego. The same guy who turned his VW bus into an electric vehicle. 

Why did the 1.6 liter air cooled engine need constant work? He was transporting six adventurers...with all of their accessories....up and down the Andes mountains. The gear was hauled in huge  wooded boxes sitting on top of the van. A disaster waiting to happen.

Another really bright guy doing a pretty dumb thing....in retrospect.