We need to talk about Rad Power Bikes’ new e-bike batteries
Electric bikes just may be the biggest transportation revolution of our generation, helping millions replace car usage with more affordable, more efficient alternatives. But there’s no denying that concerns have been swirling about the safety of e-bike batteries, even if such fire fears have primarily been overblown by much of the media.
Leading electric bicycle maker Rad Power Bikes has just unveiled its new “Safe Shield Battery” in an effort to mitigate worries over e-bike battery safety. And it’s something we need to talk about.
The whole underlying issue here is based on the fact that e-bike batteries are usually comprised of dozens of smaller, energy-dense lithium-ion battery cells. Those cells are similar – and sometimes identical – to the battery cells used in everything from electric cars to power tool battery packs.
The individual battery cells store lots of energy and are generally quite safe. However, danger can occur when the cells are punctured or short-circuited, with the latter often happening when water makes its way into battery packs over time. Well-made e-bike batteries use several methods to mitigate these risks, and the result is that battery fires are exceedingly rare. Even in e-bikes, which seem to unfairly receive the brunt of lithium-ion battery fire scaremongering, such fires occur in a tiny, tiny fraction of a percent of e-bikes.
To put things into perspective, New York City often gets labeled as the epicenter of e-bike fires, yet New Yorkers are somewhere around 5x more likely to die on the subway than from an e-bike fire.
However rare though, e-bike fires can and do occur in poorly made batteries or in battery packs that have been abused, damaged, or otherwise misused. And that’s exactly what it looks like Rad Power Bikes set out to solve with its new Safe Shield e-bike batteries.
The secret sauce in Rad’s batteries isn’t actually the battery cells themselves. Those are fairly standard cells like you’ll find in many other e-bike batteries. The major difference is how the battery packs are constructed.
They use a method known as potting, which basically encapsulates electronics in a waterproof resin barrier. It’s common in electronics that will live much of their lives outdoors, as it seals the sensitive components from moisture.
Remember that mosquito from Jurassic Park that was encased in tree resin amber? That’s kind of the idea with potted batteries, just with a urethane resin instead of tree sap. The battery pack already uses quality construction methods, but then to top it off, the entire thing is filled with resin that makes it impermeable to water – or intruding fingers, tools, or anything else. It’s forever sealed away from the world (though Rad says it’s still recyclable in their battery recycling program).
But it’s not just any resin, the idea is that it is also thermally insulating, which means that if one battery cell ever did go rouge and start overheating (an incredibly, incredibly rare event in well-made battery cells), the barrier would help protect any nearby cells from joining in and developing what is known as a “thermal runaway” condition that is what ultimately leads to the spread of most battery fires.
We spoke to one of the country’s leading battery experts Luke Workman on our Wheel-E podcast last year, who has often performed forensic evaluations in the aftermath of battery fires. When we asked him if there was anything that could be done to help mitigate the fire risks we were seeing in the e-bike industry, such as the widespread adoption of UL certification, he had a simple answer: “Potting.”
Workman explained that he’s performed post-fire forensic analysis on plenty of UL-certified battery packs, indicating that such certification isn’t a guarantee of safety. “You can pass UL water ingress tests with a bit of strategically placed tape over the battery seams,” he explained at the time. But potting was the truly safest method of building batteries that wasn’t intended to merely pass a certification test, but rather to actually ensure the battery cells were isolated and protected.
At the time, there was just one major company producing potted e-bike batteries, Luna Cycle, but it hasn’t gained significant traction anywhere else in the e-bike industry.
At least not until now.
With Rad Power Bikes adopting potted battery design practices, the entire industry has been put on notice. Until new technologies like fireproof solid-state batteries become commonplace, potted batteries are the single best defense against battery fires. And with one of the largest e-bike retailers in the country hopping aboard the potted train, others are all but sure to follow.
Rad has a history of setting examples that are quickly copied throughout the US e-bike industry. New e-bike models like the RadRunner spurred several copycats and jumpstarted the utility e-bike market. Rad’s expansions into several large brick-and-mortar stores pre-empted a major push by several other US e-bike companies to expand dealer networks with independent bike shops. Rad’s electric trike was quickly followed by several other competitors seeking to undercut its price.
In none of these examples was Rad the first e-bike company to make a major move, but it was the first big e-bike company to do so, and thus helped shift the industry each time. And while there’s no guarantee how the industry will react, especially in a year where e-bike sales have lagged behind the post-pandemic boom, there’s no doubt that a major e-bike maker finally adopting potted battery technology is a sign of where the industry is headed. How long it takes us to get there though, that’s anyone’s guess.
resin pouring image via: Pexels
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![The new Momentum Cito E+ dares you to leave the car at home [Video]](https://i0.wp.com/electrek.co/wp-content/uploads/sites/3/2024/04/momentum-cito-e.jpg?resize=1200,628&quality=82&strip=all&ssl=1)
All the cool suburbanites are already taking their kids to school, loading up at the farmers’ market, and making deliveries on clever and capable cargo e-bikes, but the new Momentum Cito E+ from Giant raises the cargo bike bar even higher — and makes leaving the car at home easier than ever.
Momentum is a new brand of “lifestyle” e-bikes from Giant Group designed to deliver premium features to customers while still hitting that $3,000-4,000 market “sweet spot.” Their latest bike, the all-new for 2024 Cito E+ utility bike, does just that, coming to market with a premium battery, Bluetooth technology, a suite of high-end safety features, and a $3,200 starting price.
Premium battery
Getting the most out of your e-bike often means getting the most out of your battery — and Momentum absolutely gets that. The Cito E+ ships with a 780 Watt-hour Panasonic battery pack with 22700 cells that have been optimized for e-bike use.
Compared to other ebike batteries with similar power ratings, the Momentum’s Panasonic battery promises to be lighter and more durable, with superior IPX7 weather protection, thermal regulation, and other safety features built-in (in fact, Panasonic was the first e-bike supplier to score a UL safety rating for its batteries).
The battery is easily removable for charging at home or in an office, but it can be charged while it’s in the bike, too. Either way, charging won’t take long — from 0 to 80% of charge (approx. 60 miles) of range is available in 3.5 hours, while a full (75 mile) charge takes less than 5 hours.
Connected cargo bike
As our test rider highlights in the video (above), the Momentum Cito E+ uses a proprietary battery management system, or BMS, to monitor the battery pack for maximum efficiency and reliability down to the individual cell level.
The BMS uses Bluetooth connectivity to transfer battery health data, state of charge, and other important information straight to the RideControl app, which enables the bike’s owner to get an in-depth look at the overall state of their e-bike and provides valuable diagnostic data to both the technicians tasked with servicing the bike and Giant themselves, to help develop even better e-bikes in the future.
That connection to Giant Group is a huge potential benefit to Momentum Cito E+ buyers, by the way, as it gives them access to support from more than 1,200 brick and mortar Giant dealers across the US alone (above).
That’s a serious advantage that online-only bike brands simply can’t match.
Safety first … and maybe second, too
Momentum’s commitment to safety doesn’t stop at the battery. The Cito E+ features confidence-inspiring 4 piston hydraulic disc brakes and a heavy duty suspension for predictable handling even under heavy loads — important if you have to suddenly haul the bike down from its electronically assisted 28 mph top speed with precious kids and cargo on the back.
LED head and taillights with a lever-activated taillight ensure Cito E+ riders will be seen, too, helping you stay safer after hours.
Accessories and add-ons
Momentum’s Cito E+ offers a comprehensive selection of accessories to help optimize it for each rider’s unique use case — whether that’s hauling up to 132 lbs. of cargo on the rear rack and 33 lbs. on the optional front basket (shown, above), or adding 2 Thule Yepp Maxi seats and getting the little ones to school five times a week.
You can find out more about the Momentum Cito E+ and the brand’s available accessories by clicking here.
Momentum Cito E+ gallery
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Environment
‘This is a unique time’: ARK Invest’s chief futurist tackles tech innovation from AI to robotics
ARK Invest’s chief futurist lists five groups that should give tech investors an edge.
According to Brett Winton, robotics, artificial intelligence, multi-omics sequencing, public blockchain and energy storage are key areas because they’re all entering the marketplace at the same time.
“We believe that this is a unique time in technological economic history,” he told CNBC’s “ETF Edge” this week.
Winton collaborates with ARK Invest CEO Cathie Wood to maintain the ARK Venture Fund (ARKVX), which allows investors to buy into the private technology space.
According to the firm’s website, the goal of the fund is to make venture capital offerings of innovative spaces in the market accessible to individual investors. As of April 10, it shows the fund’s top holdings include Epic Games, known for online video game Fortnite, and biotech companies Freenome and Relation Therapeutics.
“Our emphasis is that we are investing in innovation over the long term and going to support management teams,” said Winton.
He contends it’s a strategy that’s often not prioritized.
“That’s a real challenge a lot of public market investors don’t have that long-term view,” Winton added.
The ARK Venture Fund is down more than 7% so far this year. However, it’s up almost 39% percent over the past 52-weeks.
FirstElement Fuels has opened the world’s first large-scale hydrogen fueling station for heavy-duty commercial trucks just outside the Port of Oakland.
FirstElement is calling their new filling station, which opened to the public this week for tours and demonstrations, the first of its kind. Located near the Port of Oakland, the company claims its hydrogen pumps can “fill” a truck’s hydrogen tanks in as little as ten minutes, which works out (in their math) to as many as 200 trucks per day.
As for customers, the company says there are 30 Hyundai Xcient semi trucks using the fueling station currently, as well as a number of Nikola hydrogen fuel-cell-powered trucks.
A ceremony to mark the station’s opening was held Tuesday, and was attended by state officials including Liane Randolph, chair of the California Air Resources Board (CARB) and Tyson Eckerle, clean transportation advisor for Gov. Gavin Newsom’s business development office. Primary funding for the Oakland station was provided by CARB and the California Energy Commission.
Eckerle notes that the US federal government is handing out $8 billion to jump-start what it calls the “hydrogen economy,” and expects sufficient funding to build up to 60 more hydrogen truck stations like this one in California – which would, theoretically, be enough to serve 5,000 trucks and 1,000 buses.
All well and good, but …
What if it’s already too late for hydrogen?
MAN Trucks CEO, Alexander Vlaskamp, said it best when he said that it was “impossible” for hydrogen to effectively compete with BEVs.
He’s right – on a level playing field, there is absolutely no reason to believe hydrogen has any kind of future. But we don’t operate on a level playing field, and comments like Eckerle’s, along with an $8 billion federal budget and a number of supposedly genuine industry experts touting its usefulness as a fuel, mean we have to take hydrogen seriously (at least, for now).
Even so, it seems like the tide of public opinion is already starting to turn against hydrogen. Outlets that may never have questioned a manufacturer’s claims about a hydrogen-fueled vehicle a few years ago now seem more than willing to call those claims out. Here’s just one example:
Producing hydrogen itself can be very dirty. Most hydrogen produced today requires methane, which is a fossil fuel and a strong greenhouse gas contributor. The industry is working on production alternatives, including carbon capture and storage from the burning of methane, or quitting methane altogether to make green hydrogen, using an electrolyzer to split water’s hydrogen and oxygen.
Both alternatives are prohibitively expensive without government subsidies.
RUSS MITCHELL, AOL/Los Angeles TIMES.
So far, it’s not clear that FirstElement’s claims about either the sustainability of its hydrogen or the practicality of its filling station will convince many battery electric absolutists.
Take the company’s hydrogen production process as an example. FirstElement says that its supplier, Air Liquide in Las Vegas, uses natural gas as “feedstock” for its hydrogen. It buys biogas to blend with natural gas in order to create hydrogen – and that, because the gas used is more than 60% renewable, the hydrogen qualifies as “green.”
FirstElement hydrogen production
Additionally, the claim of 10 minute fast fills should come with an asterisk or two. That’s because FirstGreen is using new “cryopump” technology from Bosch Rexroth to allow for filling at 900 bar (15,000 psi). While that seems like more enough to push 100 kg into a tank in about ten minutes, cryogenically cooling hydrogen is an energy intensive technology that requires a lot of electricity to function properly. Electricity that it says will come from the stored hydrogen.
In fairness, however, Bosch has some ideas here to help station owners maximize the usefulness of all that electricity.
“Cold is like gold,” says Dave Hull, regional vice-president, Bosch Rexroth. “You’ve got all this cold energy. All my career I worked to get rid of heat. You can take that energy and run a whole station’s refrigerators for Rock Star energy drinks, or air conditioning. Bosh has a whole division of heat pumps and building technologies.”
Whether or not that added efficiency adds up to actual energy and cost savings, rather than a lifeline for the gas industry and tier 1 auto suppliers like Bosch however, remains to be seen. Meanwhile, hydrogen costs continue to rise.
Platts last assessed California’s retail hydrogen price at $33.48/kg Jan. 4, 2023, which is the weighted average hydrogen price offered at retail fueling stations across the state. The price has risen 112% from when Platts began the assessment in September 2021, according to S&P Global Commodity Insights data.
Despite the high cost of hydrogen (“green” hydrogen is more expensive, still), Shane Stephens, one of FirstElement’s founders and its chief development officer, remains undeterred.
“We, at FirstElement Fuels, have a lot of confidence the market is coming,” says Stephens. “We see the regulations on the horizon, the OEMs and fleet owners are going to have to respond to that, especially when it comes to goods movement, and hydrogen and fuel cells are the best – if not only – solution that will work for many of those use cases.”
Electrek’s Take
As a light vehicle fuel – despite the efforts of Hyundai, Toyota, and (more recently) Honda – things aren’t going well for hydrogen. As a fuel for massive semi trucks and even bigger heavy equipment, however, it might stand a chance against current battery technology.
But battery tech isn’t stagnant, and lighter, better, faster charging battery news that used to come every year, and then every month, now seems to be coming every week – and I’d argue that you’d be foolish to assume batteries that are twice as energy dense at half the weight won’t be here well ahead of California’s 2035 ICE ban.
But that’s just me. You guys are smart. Head on down to the comments and let us know what you think.
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