GM is betting on a revolutionary new battery system for its electronic future

When (Sports utility truck) and its its Hit dealers in the fall of 2021 and 2023, respectively, will be among the first models of GM’s new electrified lineup to be built on top of the company .

General Motors is no stranger to the electric car market. GM started its electrified venture with EV1 in 1996, Produced by a large auto manufacturer that continues to this day . It was abandoned by the BEV2 platform of which the 2016 Chubby Bolt was the first model. Today, GM relies on an EV platform powered by Altium battery systems as the basis In the coming years (20 zero-emissions models available by 2023) as part of a search for an EV carmaker’s business restoration company – although you’ll be under a lot of pressure to find references to “Beave 3” in GM’s press though materials

“Thousands of GM scientists, engineers and designers are working to implement a historic rearrangement of the company,” said GM President Mark Reus. . “They are in favor of providing a profitable EV business that can satisfy millions of customers.”

During a news event last May, GM chief executive Mary Barara assured reporters that the company plans to make a profit on every Ultimate EV sold and aims to sell one million EVs annually by 2025. Of these, GM plans to release its EVs with 19 different battery pack-drivetrain combinations – significantly down from the current 550 gradient in its internal turbulent fleet.

Unlike Tesla battery technology, which uses cylindrical cells (such as AA’s), GM has chosen to use it instead. Cells (both shaped like flat rectangular boxes). This enables GM engineers to assemble 6 to 24 cells in each module unit – Depending on the power train options selected – and then stack these modules horizontally or vertically within the vehicle’s dimensions. Cylindrical, inversely, only duplicates vertically. With this flexibility, the GM can pack anywhere from 50 kWh to 200 kWh of power (twice the current largest Tesla battery, , Can hold) 350 – 400 miles in approximate range and translates to 0 – 60 below as 3 – seconds.

“This is a long complex optimization routine,” Tim Grew, general director of electrical engineering and cell engineering at General Motors, told ENAZ. Getting the most out of an Ultium battery pack of a given size “What are you using it in your portfolio and how can you get the most out of it – it’s usually [with using] The largest cell. You have the flexibility to configure them the way you want, ”he said .

Steve Fact for General Motors

GM has developed WBMS in conjunction with analog devices. The system requires 90 percent fewer wires and reduces the size of the battery pack by 15 percent while “improving design flexibility and productivity without compromising accuracy and precision on battery life” . WBMS is a fully integrated system, including all circuits, hardware, and software for single system-level product power, battery management, RF communication, and system functions.

“Switching battery packs from wired to wireless connections has enabled automotive manufacturers to use their electric vehicle platforms to meet growing customer demand across multiple vehicle models,” said Patrick Morgan, VP of Automotive at Analog Devices. “Our WBMS solution not only simplifies production, but also allows the creation of new systems on a wireless data, accelerating the entire industry towards a sustainable future. Together with General Motors, we are honored to bring this groundbreaking system innovation to market.

Checking GM battery

Ordinary motor

This management system is not only smoother than its competition, it is also smarter. When the ultium modules are assembled, specific details about the specific chemistry of each cell are programmed into the BMS med. This not only enables the BMS to maintain a better balance between individual cells as the module ages, more efficient chemistry should come to market without replacing the whole pack. Technicians should be able to remove entire modules. This also means that GM doesn’t have to stockpile old formula cells after a new one arrives – the whole manufacturing process can then move on to new chemistry.

What’s more, once one of these batteries reaches the end of its autonomous service life, it can easily outperform other applications – such as home power storage – thanks to its ability to balance output between BMS modules. “It’s a single cell that can meet all of these needs,” Gray said. “We do this most efficiently while maintaining the highest quality.”

Altium is also unique to the cell’s chemistry industry. For example, Chevy Bolt used an NCM battery – nickel-cobalt-magnesium. Cobalt has been shown to be very effective in stabilizing the chemistry of a cell, thereby extending the overall stability of the battery. However, cobalt – although a common component in the Earth’s upper crust – is produced almost exclusively in the Democratic Republic of Congo, Russia, and Australia, and is mined every year by the Central African country rather than by the other two countries. The DRC is a politically unstable nation and whenever problems start popping up there, the whole world remembers the next supply when cobalt exports are temporarily stopped.

Disliked , GM (in partnership with LG Chem) has adopted a more computational approach to doping its anodes with aluminum to avoid disruption to its EV supply chain. Ultium’s NCMA (nickel-cobalt-magnesium-aluminum) batteries contain 70 percent less cobalt than NCM-based cells without significant reduction in cell durability. In fact GM and LG Chem are currently working on further development of the technology in the hope of completely removing cobalt and nickel from battery chemistry.

Grew notes that two companies are monitoring the silicon-based hybrid electrolyte lithium metal anode, dubbed it. , As the successor to the NCMA. “The beauty of silicon is that it is only effective in periodic tables and it can contain much more lithium than carbon cans.”

“Aluminum doping was a real success in that they were able to incorporate cathode components to achieve better life characteristics and confirm its basic efficiency.” Grew mentioned. “These cars, we’re going to run them on faster chargers, and we’re going to use them more strongly on the Hummer EV with the Watts to Freedom (aka Launch) mode. This dope really forced us to say, ‘Well you can really start using it [the battery system] A lot, a lot harder and it’s the end of truck life. “

Grith cited GM’s recent research on lithium-metals . “We now see a very efficient path with almost double the energy concentration … which will easily enable 500 – 600 miles of vehicles in the future.”

What’s more, the Altium system is capable of handling an 800V electrical architecture. That is, most mainstream EVs on the road today (with the exception of luxury models like the Porsche Tekken, Audi E-Tron GT and Polyester 2) and most DC fast charging stations use a 400V standard, which limits the amount of power your car can receive. Decaying energy can go about 200 kilowatts in cells. With an 800V architecture, a DC station can pump as much as 350 kilowatts across its line – more than double Tesla’s 150 kilowatt limit. This enables Altium to charge vehicles faster – GM claims it can add 100 miles to 10 minutes of charging time – and to bring some power output to some other devices (even other EVOs) using the Integrated Charging Control Unit (ICCU) GM has yet to say when GM Altium-powered vehicles will be able to enable V2L.) Or two-way charging.

GM also claims that by removing the relatively expensive cobalt from its chemistry in favor of more affordable aluminum, the company may be able to bring down the price of its batteries to ড 100 per module by 2024. The $ 100 / module is widely regarded as the holy gill of EVs as battery technology at the rate at which EVs achieve price parity with fossil fuel powered vehicles. What’s more, as Doug Park, GM’s executive VP for global product development, , Cell costs currently represent 80 to 90 percent of the total value of the battery. That percentage has increased in the range of 60 – 65 percent in recent years, with casing, wiring and other components representing the rest of the production cost.

“We probably over-designed those battery packs when we started with volts and bolts. I mean, they have a lot of cool things in them and they can never die. GM President Mark Reus, we don’t have too many warranties with those things . “But that’s the way you can control it and how people really use it, which you do it – you’re really guessing. So the way you go out of battery use is the skill where you’re reducing cell costs and size, performance Improves quality, cell free from cell chemistry “

General Motors has unveiled its all-new modular platform and battery system, Altium, Wednesday, March 4, 2020, at the design dome of the GM Tech Center campus in Warren, Michigan.  (Photo by Steve Fact for General Motors)

Steve Fact for General Motors

“I still don’t know the bottom of the spending curve,” Gray told Engadget. “And it’s moving faster than anyone could have predicted. The following year, when Hummer EV and Cadillac Lyric’s initial ultimatum chemistry was introduced, we found the project’s battery costs to be 40 percent lower than today’s costs. By the middle of the decade we had noticed that battery consumption would double the power density and be 60 percent lower than it is today. “The first generation of Altium has already packed a higher power concentration than the batteries obtained from last year’s Bolt EV,” said Gray.

These batteries will probably be made and manufactured at GM’s new factory Zero, although a certain age gearhead will certainly recognize this as a tribute. , In Northeast Ohio. GM owned and operated the Lordstown Assembly from 196666 to 2016, initially building iconic Chevrolet models such as the Capris, Impala and Bell Air, as well as more recent compact vehicles such as the Cavalier, Cobalt and Cruise.

Gerald Johnson, GM Executive Vice President of Global Manufacturing, said, “Factory Zero is the next battlefield of the EV race and it will be GM’s main gathering point on our journey to an electronic future,” said Gerald Johnson, GM . “The electric trucks and SUVs that will be built here will help transform the GM and automotive industries.”

GM pledges ২ 2.2 billion to rebuild and rebuild site facilities after data – The single largest investment in a plant in GM’s history. Once it starts operating, the new plant is expected to employ 2,200 workers and be run exclusively by renewable energy by 2023. To produce about 250 million ultium cells a year by 2025, and once fully online, the Lordstown facility should produce at least 30 gigawatt-hours of batteries a year – 50 percent more capable than Tesla’s Nevada-based Giga Factory. Humor itself will be produced at GM’s Detroit / Hamtramck assembly plant in southeastern Michigan, built on the old site of the original Dodge factory, built in 1911.

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