UL Is Dedicated to Helping Ensure the Safe Use of Lithium-ion Batteries for Generations to Come
From smartphones to electric vehicles, lithium-ion batteries impact our lives in some way each and every day.
That fact will continue to ring true in the coming decades as we march toward powering our planet with as much renewable energy as possible. That’s why lithium-ion batteries are part of UL’s New Science research—which is dedicated to mitigate emerging risks and safeguarding innovation.
UL recognizes that maintaining and enhancing lithium-ion batteries is essential for work, play and most importantly—safety. That's why UL has released its New Science Lithium-ion Batteries Journal, a 19-page compendium detailing thevariety of processes its global researchers, scientists and engineers underwent to help ensure the safe use of sustainable lithium-ion batteries for generations to come.
UL continues to spearhead research, conduct experiments and update standards that guarantee the safe commercialization of lithium-ion batteries. As new technologies continue to transform the energy sector, UL is charged with the task of continuing to study the safety issues related to lithium-ion batteries—a market that is expected to double from 2012 to 2016.
With this in mind, UL’s New Science journal looks at three ways to safeguard lithium-ion batteries:
• Computational modeling of lithium-ion batteries—UL developed a unique thermal model of the common 18650 lithium-ion battery cell that enhances our ability to mathematically simulate, explore and understand the causes and severity of internal short circuits (ISCs). ISCs can result in fires or explosions, so we needed to understand the electrical, electrochemical and chemical reactions that cause heat generation within a battery. ISCs normally begin on a small scale in a localized area within a battery cell that produces localized heating. Though small, an ISC can cause safety designs outside of cells to have no effect and can bypass most of the safety devices within the cell, such as the fuse that is designed to open to vent excess voltage or heat. With new insight on the characteristics, behaviors and failure mechanisms of ISCs, UL is in a position to help manufacturers safeguard the batteries they make across the design, materials specification, manufacturing and quality assurance processes.
• Safeguarding lithium-ion battery separators—Battery separators are central to the overall performance and safety. Separators have been made thinner and lighter over time in an attempt to increase battery performance. However, this has diminished the capability of some to prevent electrode contact or shut down their device when overheating occurs. UL applied materials science to develop a testing approach that establishes a more robust evaluation of lithium-ion battery separators. These tests help ensure that lithium-ion battery design is safe for its intended use. The battery separator program is still in its early stages, but UL continues conducting and witnessing tests and publishing parameters in the UL online directory. Lithium-ion battery and separator manufacturers can submit separators to UL for safety testing and certification. There are no pass/fail criteria. Instead, UL focuses on identifying the properties of tested separators. That's how this program can help manufacturers advance the performance of lithium-ion batteries while enhancing their safety.
• Thermal analysis of lithium-ion batteries—In addition to ISCs, unsafe heat generation can also occur when the surrounding environment overheats the battery or by overcharging or over-discharging the battery. In each of these cases, the result can be a thermal runaway, in which an initial heat event in the battery triggers additional exothermic reactions very rapidly in a chain reaction. When this happens, the battery will typically catch fire, rupture or explode. This comprehensive thermal analysis capability allows UL to identify and measure exothermic and endothermic reactions within the battery cell. UL now knows that separators made of polyethylene and polypropylene will melt at about 130 and 160 degrees Celsius, respectively. Also, lithium-ion battery electrolytes decompose under overheating conditions, causing gaseous substances that pressurize the cell. The test methodologies in the chart below allow us to better understand the potential safety risks of different materials and components in a battery, along with their complex electrochemical and functional interactions and how these are affected by heating conditions.
Safeguarding lithium-ion batteries is made more difficult by the complex interactions of more than 10 types of materials and components. The comprehensive set of thermal analysis tools and methods helps UL holistically examine how batteries react to heat conditions, which is vital because all lithium-ion battery safety issues involve heat generation.
The thermal analysis is especially critical today, as the industry pushes to advance lithium-ion battery performance through the use of new materials and battery designs. With thermal analysis, UL is continuing to help pinpoint safety risks, identify safe performance envelopes and develop effective risk-mitigation approaches.
NEW CHALLENGES CALL FOR NEW SCIENCE
New Science is dedicated to mitigating risks and safeguarding innovation. Progress is an unstoppable, transformative force. New technologies, product advances and globalization are arriving one on top of another at a dizzying pace. Innovation makes us more efficient, more productive and more connected. But there is a cost, and that cost is risk. UL is currently focusing our New Science efforts around four important themes. These include: Fire Safety, Indoor Air Quality, Transaction Security and Sustainable Energy.
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By Karen Charman
When President Donald Trump visited California on September 14 and dismissed the state Secretary of Natural Resources Wade Crowfoot's plea to recognize the role of climate change in the midst of the Golden State's worst and most dangerous recorded fire season to date, he gaslighted the tens of millions of West Coast residents suffering through the ordeal.
Foxes Guarding the Henhouse<p>Before he assumed power, Trump attacked regulations as unnecessary barriers to freedom and economic prosperity. Since taking office, he has targeted anything enacted by the administration of his predecessor, Barack Obama, and taken steps to withdraw the U.S. from the Paris agreement, the international effort to combat climate change. He has also staffed heads of key agencies with climate deniers of various stripes, forced out career public servants and created a hostile work environment for those who don't profess loyalty to his deregulatory agenda.</p><p>Like Trump himself, some of his cabinet choices displayed an audacious penchant for <a href="https://www.nytimes.com/interactive/2020/09/27/us/donald-trump-taxes.html?action=click&module=Spotlight&pgtype=Homepage" target="_blank">self-dealing</a> and abusing their positions of authority. One example is Trump's first Environmental Protection Agency (EPA) Administrator, Scott Pruitt, who aggressively worked to overturn Obama's climate regulations, spent most of his time in <a href="https://www.washingtonpost.com/national/health-science/trump-epa-head-steps-down-after-wave-of-ethics-management-scandals/2018/07/05/39f4251a-6813-11e8-bea7-c8eb28bc52b1_story.html" target="_blank" rel="noopener noreferrer">private meetings</a> with fossil fuel and chemical company executives, sidelined career EPA staff and reconfigured independent scientific advisory boards to make them more supportive of the industries EPA is charged with regulating. Dubbed "<a href="https://www.latimes.com/politics/la-na-pol-pruitt-leaves-20180705-story.html" target="_blank" rel="noopener noreferrer">one of the most scandal-plagued Cabinet officials in U.S. history</a>," Pruitt resigned in disgrace after revelations about his multiple brazen abuses, including using the agency as his personal concierge service and piggy bank.</p><p>Pruitt's deputy, Andrew Wheeler, a <a href="https://www.cbsnews.com/news/andrew-wheeler-acting-epa-administrator-former-number-two-before-scott-pruitt-resignation/" target="_blank">former coal industry lobbyist</a> and longtime Republican Washington insider, took over and has continued Trump's deregulatory agenda apace.</p><p>At the Department of Interior (DOI), a sprawling agency that oversees 75 percent of the country's public federal lands and includes the U.S. Geological Survey, which is tasked with evaluating natural hazards that threaten life and the health of our ecosystems, Trump installed another flamboyant anti-environmentalist to head the agency. Like Pruitt, Trump's first Interior Secretary Ryan Zinke aggressively attacked environmental regulations, <a href="https://www.washingtonpost.com/news/energy-environment/wp/2017/05/07/epa-dismisses-half-of-its-scientific-advisers-on-key-board-citing-clean-break-with-obama-administration/" target="_blank">ditched more than 200 advisory panels</a>, and pushed to open up vast swaths of public land to oil and gas drilling. Described by one environmental group as "<a href="https://www.washingtonpost.com/national/health-science/interior-secretary-zinke-resigns-amid-investigations/2018/12/15/481f9104-0077-11e9-ad40-cdfd0e0dd65a_story.html" target="_blank" rel="noopener noreferrer">the most anti-conservation Interior secretary in our nation's history</a>," Zinke was forced out after numerous highly publicized conflict-of-interest scandals.</p><p>The DOI is now run by Zinke's deputy secretary, David Bernhardt, another longtime Republican Washington insider and former oil industry lobbyist who has also been the subject of <a href="https://slate.com/news-and-politics/2020/05/this-is-still-happening-david-bernhardt-trump-lincoln.html" target="_blank">several government ethics complaints</a> for various violations favoring polluting industries.</p><p>More recently, longtime climate change denier David Legates, a climatologist at the University of Delaware previously <a href="https://insideclimatenews.org/news/19032015/u-delaware-refuses-disclose-funding-sources-its-climate-contrarian" target="_blank">funded by fossil fuel interests</a>, was hired for a <a href="https://www.npr.org/2020/09/12/912301325/longtime-climate-science-denier-hired-at-noaa" target="_blank" rel="noopener noreferrer">top job</a> advancing weather modeling and prediction at the National Oceanic and Atmospheric Administration (NOAA). Legates has called for <a href="https://www.democracynow.org/2020/9/18/noaa_david_legates_climate_crisis" target="_blank" rel="noopener noreferrer">increasing carbon emissions</a>.</p><p>The Trump administration has done much more than stack government agencies with fossil fuel industry proponents. It has removed or diluted discussion of climate change from as many government platforms as it can and decimated independent scientific advisory boards that provide unbiased, fact-based information the government needs to enact policies that protect the public. It has also <a href="https://thehill.com/policy/energy-environment/482352-trump-budget-slashes-funding-for-epa-environmental-programs" target="_blank" rel="noopener noreferrer">slashed environmental agency staffing and budgets</a>.</p>
The Damage So Far<p>A September 17 <a href="https://rhg.com/research/the-rollback-of-us-climate-policy/" target="_blank">report</a> by the Rhodium Group calculates that 1.8 billion tons more greenhouse gases will be released over the next 15 years as a result of climate change rollbacks the Trump administration has achieved so far. These include repealing Obama's main climate policy, the Clean Power Plan, which was intended to reduce dirty emissions from power plants; increasing pollution from cars by rolling back fuel economy standards and challenging California's longtime authority to set stricter emissions standards; targeting controls on hydrofluorocarbons, powerful greenhouse gases used mainly in refrigerators and air conditioners that also destroy the Earth's protective ozone layer; and allowing unreported and unregulated emissions of methane, another potent greenhouse gas, by oil and gas companies.</p><p>Besides these measures, Trump is also trying to gut core environmental statutes like the Clean Air Act, the Clean Water Act, the National Environmental Policy Act and the Endangered Species Act, all of which were enacted to protect human health and preserve a livable world.</p><p>The Paris agreement aims to keep the rise in average global temperatures at less than 2 degrees Celsius above pre-industrial levels and hopefully cap it at 1.5 degrees C or lower. We are now at approximately 1.2 degrees C and counting.</p>
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By Jan Ellen Spiegel
It wasn't so long ago that the issue of climate change was poised to play a huge – possibly even a decisive – role in the 2020 election, especially in the race for control of the U.S. Senate. Many people supporting Democratic candidates saw a possible Democratic majority as a hedge against a potential Trump re-election … a way to plug the firehose spray of more than 100 environmental regulation rollbacks and new anti-climate initiatives by the administration over its first term.
Potential Climate Voters<p>In a September 1 memo on climate and the election, Andrew Baumann, vice president of the consultants Global Strategy Group, wrote: "Few issues have seen as dramatic a shift in public opinion as climate change has over the last few years. Only marriage equality and the recent shift in views around racial justice outpace the rapid growth in the salience of climate change as an issue."</p><p>Calling it a "winning political issue" the memo says: "First, it is clearly a motivator for both younger and Latinx voters. Second, it has the power to move swing voters, particularly center-right white women."</p><p>Baumann points to a finding that when a group of such women were asked generic ballot questions, Democrats trailed by nine percentage points. But when the question was revised as a choice between:</p><p>"A Democrat who supports taking strong government action to combat climate change.<br>A Republican who opposes taking strong government action to combat climate change."</p><p>… the result was a 29 percentage point shift, putting Democrats ahead by 20 percentage points among that same group.</p><p>"I think it is playing a role," says Senator Sheldon Whitehouse, D-RI, a longtime outspoken climate activist who is on the Senate Environment and Public Works Committee and also on the Senate Democrats' Special Committee on the Climate Crisis. If Democrats win back the Senate, he stands to play an even more pivotal climate role as part of the majority. He is not up for re-election this year.</p><p><span></span>"I think from the Democratic side it's playing a role in generating enthusiasm – particularly making younger voters feel that they have a real stake in this election. On the Republican side, I think things have moved enough that candidates can no longer get away with simply scoffing about climate change."</p>
Climate a Top Concern for Youths, Latinx<p>So who's still thinking climate? Mostly young voters – 18 to 25 or 29 and Latinx voters.</p><p>Climate and the environment are the top concern among young voters, just above racism and healthcare according to <a href="https://circle.tufts.edu/latest-research/poll-young-people-believe-they-can-lead-change-unprecedented-election-cycle" target="_blank" rel="noopener noreferrer">CIRCLE</a>, the Center for Information and Research on Civic Learning and Engagement at Tufts University, which focuses on the political life of young people in the U.S. For Latinx youth, it drops a bit but remains in the top three.</p><p>The issues young people care about have an impact on how they volunteer their time, says Kristian Lundberg, an associate researcher at CIRCLE. He says that's played out most notably through the Sunrise Movement, which focuses on climate change and the environment along with other key activist groups such as Black Lives Matter and March for Our Lives.</p><p>He points to polling this summer that showed that 83% of 18-to-29-year-olds felt they had the power to change things. "Young people feel much more empowerment than in 2016 and 2018," Lundberg says. "It's intentional these movements are carving out space for young people. It's an important strategy."</p><p>In positions of power in these organizations, young people have developed peer-to-peer outreach on activism. And Lundberg says young people have made the leap that connects activism to voting as a lever for change. "In the past in very close races, young people breaking heavily have provided the margin of victory," he says.</p><p>CIRCLE is highlighting 10 U.S. Senate races as ones in which young voters can be decisive. Several of them have notable climate or environmental components – most prominently the Colorado and Montana races.</p><p>The Republican incumbents in each state – Cory Gardner in Colorado and Steve Daines in Montana – are running against a popular Democratic governor – John Hickenlooper in Colorado, now out of office — and Steve Bullock, still the governor of Montana. Both governors have had to balance their state's fossil fuel economic interests with supporting climate change solutions.</p>
Tying Climate Change to the Economy<p>In August, Data for Progress, a progressive research think tank, released polling on climate change – including in the battleground Senate elections in Arizona, Iowa, Maine, and North Carolina – showing voters back a Senate candidate supporting strong climate action.</p><blockquote>Climate change as 'mobilizing issue … key persuasion issue.'<br></blockquote><p>It also showed that linking climate change to the economy may be key. That means talking about clean energy and jobs together, says Danielle Deiseroth, climate data analyst for <a href="https://circle.tufts.edu/latest-research/poll-young-people-believe-they-can-lead-change-unprecedented-election-cycle" target="_blank">Data for Progress</a>. She says that in addition to jobs, climate change issues include climate justice and economic equality – both of heightened interest because of fallout from western wildfires.</p><p>"Climate change, we've observed over the last year or so, is a key mobilizing issue and a key persuasion issue," she says. "Climate issues can only grow support for Democratic candidates.</p><p>"I think it's pretty naive to say climate is the key issue for voters. For a lot of voters it really exemplifies so many things that are wrong with the Trump presidency," Deiseroth says.</p><p>So a factor among others. Helpful, but pivotal only in narrow circumstances.</p><p>At the League of Conservations Voters, a progressive environmentalist organization putting a lot of money and effort into the 2020 races, Senior Director of Political Affairs Craig Auster says: "I'll push back that climate change doesn't matter or isn't registering."</p><p>"It's still showing up in several Senate races. It's been playing a role in almost all of them."</p><p>Candidates are still talking about it, he says, pointing to Colorado, Montana, Iowa, and other states where ads are addressing climate and environmental issues. That shows the candidates believe their opponent is vulnerable on the issue or they're strong on it, he says.</p><p>Like others, Auster calls climate a motivator.</p><p>"Climate change matters," he says. "We have proof point after proof point about what's happening, whether it's a hurricane, a superstorm, derechos in Iowa, or wildfires out west.</p><p>"Pre-COVID it was top tier for Democratic voters along with healthcare. If COVID didn't happen I think climate would be a big deal."</p>
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