Vista Normal

Hay nuevos artículos disponibles. Pincha para refrescar la página.
AnteayerSalida Principal

The Coolest Batteries You’ve Never Heard Of

9 Marzo 2025 at 09:00
ice forming on surface with plus and minus pole

Imagine cooling your building with the same principle that kept Victorian-era icehouses stocked with lake-frozen blocks, but in modern form. That’s the idea behind ice batteries, a clever energy storage hack that’s been quietly slashing cooling costs across commercial buildings. The invention works by freezing water when energy is cheap, and using that stored cold later, they turn major power hogs (air conditioning, we’re looking at you) into more efficient, cost-effective systems.

Pioneers like Nostromo Energy and Ice Energy are refining the tech. Nostromo’s IceBrick modules pack 25 kWh of cooling capacity each, install on rooftops, and cost around $250 per kWh—about half the price of lithium-ion storage. Ice Energy’s Ice Bear 40 integrates with HVAC systems, shifting up to 95% of peak cooling demand to off-peak hours. And for homes, the Ice Bear 20 replaces traditional AC units while doubling as a thermal battery.

Unlike lithium-ion, ice batteries don’t degrade chemically – their water is endlessly reusable. Combining the technology with this hack, it’s even possible in environments where water is scarce. But the trade-off? They only store cooling energy. No frozen kilowatts for your lightbulbs, just an efficient way to handle the biggest energy drain in most buildings.

Could ice batteries help decentralize energy storage? They’re already proving their worth in high-demand areas like California and Texas. Read the full report here and let us know your thoughts in the comments.

Original photo by Kelly Sikkema on Unsplash

NEMA Releases Standard for Vehicle-to-Grid Applications

23 Febrero 2025 at 06:00

Vehicle-to-grid (V2G) has been hailed as one of the greatest advantages of electrifying transportation, but has so far remained mostly in the lab. Hoping to move things forward, the National Electrical Manufacturers Association (NEMA) has released the Electric Vehicle Supply Equipment (EVSE) Power Export Permitting Standard.

The new standards will allow vehicle manufacturers and charger (EVSE) suppliers to have a unified blueprint for sending power back and forth to the grid or the home, which has been a bit of a stumbling block so far toward adoption of a seemingly simple, but not easy, technology. As renewables make up a larger percentage of the grid, using the increasing number of EVs on the road as battery backup is a convenient solution.

While the standard will simplify the technology side of bidirectional charging, getting vehicle owners to opt into backing up the grid will depend on utilities and regulators developing attractive remuneration plans. Unfortunately, the standard itself is paywalled, but NEMA says the standard “could put money back in electric vehicle owners’ pockets by making it easier for cars to store energy at night or when turned off and then sell power back to grids at a profit during peak hours.”

We’ve covered some of the challenges and opportunities of V2G systems in the past and if you want something a little smaller scale, how about using a battery that was once in a vehicle to backup your own home?

Hackaday Links: February 16, 2025

17 Febrero 2025 at 00:00
Hackaday Links Column Banner

Just when you thought the saga of the Bitcoin wallet lost in a Welsh landfill was over, another chapter of the story appears to be starting. Regular readers will recall the years-long efforts of Bitcoin early adopter James Howells to recover a hard drive tossed out by his ex back in 2013. The disk, which contains a wallet holding about 8,000 Bitcoin, is presumed to be in a landfill overseen by the city council of Newport, which denied every request by Howells to gain access to the dump. The matter looked well and truly settled (last item) once a High Court judge weighed in. But the announcement that the Newport Council plans to cap and close the landfill this fiscal year and turn part of it into a solar farm has rekindled his efforts.

Howells and his investment partners have expressed interest in buying the property as-is, in the hopes of recovering the $780 million-ish fortune. We don’t think much of their odds, especially given the consistently negative responses he’s gotten over the last twelve years. Howells apparently doesn’t fancy his odds much either, since the Council’s argument that closing the landfill to allow him to search would cause harm to the people of Newport was seemingly made while they were actively planning the closure. It sure seems like something foul is afoot, aside from the trove of dirty diapers Howells seeks to acquire, of course.

When all else fails, blame the monkey. The entire nation of Sri Lanka suffered a blackout last Sunday, with a hapless monkey being fingered as the guilty party. The outage began when a transformer at a substation south of the capital city of Colombo went offline. Unconfirmed reports are that a troop of monkeys was fighting, as monkeys do, and unadvisedly brought their tussle over the fence and into the substation yard. At some point, one of the warring animals sought the high ground on top of a transformer, with predictable results. How turning one monkey into air pollution managed to bring down an entire country’s grid is another question entirely.

From the enshittification files comes this horrifying story of in-dashboard ads. Stellantis, maker of Jeep, Dodge, Chrysler, and other brands that can reliably be counted upon to be littered with bad grounds, has decided to start putting full-screen pop-up advertisements on infotainment systems. As if that’s not atrocious enough, the ads will run not just when the car is first started, but every time the vehicle comes to a stop in traffic. The ads will hawk things like extended warranties, at least initially, but we predict it won’t be long before other upsell attempts are made. It would be pretty easy to pull in other data to customize ads, such as an offer to unlock heated seats if the outside temperature gets a little chilly, or even flog a pumpkin spice latte when the GPS shows you’re near a Starbucks. The possibilities are endless, and endlessly revolting, because if one car company does it, the rest will quickly follow. Ad-blocking wizards, this may be your next big target.

And finally, calling all hams, or at least those of us with an interest in digital modes. Our own Al Williams will be making an appearance on the DMR Tech Net to talk about his Hackaday recent article on Digital Mobile Radio. The discussion will be on Monday, February 17 at 00:30 UTC (19:30 EST), on Brandmeister talk group 31266. If you’ve got a DMR-capable radio, DMR Tech Net has a handy guide to getting the talk group into your code plug. If none of that makes any sense, relax — you can still tune in online using this link and the Player button in the upper right. Or, if ham radio isn’t your thing, Al will be making a second appearance the next night but on a Zoom call to discuss “How to Become Rich and (almost) Famous on Hackaday,” which is his collection of tips and tricks for getting your project to catch a Hackaday writer’s eye.

❌
❌