As something of a model aircraft enthusiast, I’ve been hearing scare stories about lithium-ion batteries for over a decade – and they’re not just stories: every once in a while a model flier would leave a battery charger running in their vehicle, and suffer a fire that gutted it.
Any battery will get hot if subjected to an inappropriate regime of charging or discharging, but this kind poses additional hazards due to its chemical properties. I’m going to have to simplify quite a bit here, but basically the chemistry of the common lithium-ion cell leaves it vulnerable to a condition that is euphemistically termed “thermal runaway.”
Inside each cell is a cathode and an anode, separated by an electrolyte and a porous material called the separator.
If a component has a manufacturing defect, if it becomes damaged, if it’s short-circuited or perhaps if it’s made to work too hard, the electrolyte can catch fire – but that’s just the start. In the fire, the decomposition of the cathode and anode commonly release (among other things, if I have understood correctly) oxygen, and hydrogen. The release of oxygen in particular means that the more it burns… the more it burns. Naturally, the heat generated inside the cell means that its neighbours promptly get in on the act and the whole battery burns.
If this occurs in a confined space, such as that formed by the casing of a mobile ’phone, you get a small explosion – plus toxic gases released as the other components in the phone are subjected to extreme heat.
Oh – and lithium reacts with water. It’s not really going to be an issue by the time you notice that Samsung made you a smoke grenade instead of a telephone… but strictly speaking, you ought to use a powder extinguisher on a lithium fire.
In The Picture of Dorian Gray, Lord Henry says that “… there is only one thing in the world worse than being talked about, and that is not being talked about.”
But then, Lord Henry never heard of the Samsung Galaxy Note 7.
Last time I boarded a flight, they were talking about this ’phone:
“For safety reasons we don’t permit any model of the Galaxy Note 7 to be carried on board. If you’re carrying this device, please tell a member of the cabin crew.”
There are signs at check-in. There is coverage in magazines, on websites, on TV and radio. This is the kind of publicity that even Gerald Ratner would choke on.
Launched on August 19th 2016, the Galaxy Note 7 was Samsung’s flagship mobile, and its specifications were impressive. Just five days later came news of a Galaxy Note 7 exploding, in South Korea. By the end of the month they had delayed shipments to South Korean carriers, although the next day the product launched in China. (Presumably this reflects a belief that the bad batteries were all to be found in a particular batch, rather than any belief that Chinese customers are inherently more fireproof or more expendable than Korean ones.)
Just a day later, Samsung announced the global recall of 2½ million ’phones, although at this stage it was voluntary. On October 6th a Southwest Airlines flight was evacuated due to smoke from a Galaxy Note 7, prompting the Federal Aviation Administration to instruct passengers not to turn on or charge the ill-fated ’phone – nor to stow it in cargo. The U.S. Consumer Product Safety Commission urged Galaxy Note 7 users to cease using their phones, and carriers including AT&T and T-Mobile withdrew them from sale.
After a series of fires in replacement devices – those that had been subjected to additional inspections and quality control measures – Samsung finally threw in the towel, suspending production of the product and then announcing its end. The withdrawal of the Galaxy Note 7 left a highly unusual gap in the market because Samsung’s rivals commonly avoid bringing out competitor products at the same time of year, so customers who received a refund had relatively few options to spend their money on. Meanwhile, Apple’s share price surged, despite a recent lukewarm reception for their latest iPhone – a device most notable for the unpopular decision to remove the headphone socket.
Part of the problem here is the very personal nature of mobile ’phones: you put a lot of personal information on them including passwords and banking details; you store photos of your loved ones; you expect people to be able to reach you; you learn your way around the quirky operating system. Nobody wants to have to delete all their personal information and preferences, and give them up. Your ’phone is closer to you, for longer, than your loved ones – and you probably sleep with it on the nightstand. The idea that it might have harmed you, and that it will be taken from you – not because you broke it or lost it but because it’s no good – that feels like a betrayal. It seems that Samsung will continue to feel the effects of this problem for a long time to come.
On Supply Chain Radio they said that the times we live in magnify Samsung’s woes, because of the perils of social media. Certainly, there have been some great jokes about Samsung’s plight (see below) but I think our interconnected age actually makes it much simpler to handle a problem of this kind. For one thing, all Galaxy Note 7 users are online, by definition: they could be reached with a message about a product recall. Contrast that with the old days, when the manufacturer of a defective car would have to take out advertisements in newspapers, to tell the world how crappy their cars were. The new approach is free, and it’s accurately targeted: it need not scare off potential customers.
There is also the option of a software patch, delivered over the airwaves, to fix problems. Samsung tried a patch that would limit charging to 60% of capacity… but their ’phones kept on melting down, all the same.
Even when a fix can’t be achieved remotely, at least the connected nature of the surviving Galaxy Note 7’s offers a way to ensure compliance with the recall: presumably it would be simple enough to send out a software update that forces a shutdown – and once your smartphone has become a novelty paperweight (warning: keeping it near paper is probably a mistake) most users will be persuaded to swap it for something that works.
So, are all those defective telephones going to be remanufactured? No. Samsung has announded they will destroy all the returned ’phones. Given that the device sold for something like US$850, that’s an awful waste, but we’re now looking at a product that must be treated as hazardous. It can no longer be transported by air, or carried in the post. This leaves returned Galaxy Note 7’s scattered, rendering remanufacture uneconomical. Presumably, some recycling can still take place, if only to salvage some of the more valuable metals – but almost all of the effort that went into making these ingenious devices is wasted.
When Apple laptops were found to have hazardous batteries in 2006, they were quick to point out that the batteries in question had been made by Sony. Samsung has no such luxury: the Korean giant’s batteries were made by a subsidiary. Also, the remedy for Apple’s older laptops was relatively simple because the battery was removable. Samsung only recently switched over to a sealed in battery – presumably for reasons of waterproofing – and this has magnified their pain.
According to Credit Suisse, Samsung will have have lost nearly US$17 billion in revenue as a result of these problems.
Efforts to pack still more energy into a smaller, lighter devices continue.