GM is working on the new Hummer EV to avoid battery defects

According to the local fire department, the 2019 Chevrolet Bolt EV ignited at his home in Cherokee County, Georgia on September 13, 2021.

Cherokee County Fire Department

Detroit-as General Motors Scrambled to repair the flaws that caused the fire on at least 13 Chevrolet Bolt EVs, automakers are actively working to prevent the same problem from penetrating next-generation Ultium batteries, an all-electric version of Hummer. Is expected to be re-released this fall.

The new power system is very important for the future of automakers. Exclusive provision of electric vehicles by 2035.. The battery and the company’s entire Ultium system (platform, motors and other components) are expected to support all EVs for GM for the foreseeable future.

The issue of bolts, the company’s mainstream EV, has led automakers. To remember everything about electric cars Since production started in 2016.Vehicle repairs, such as completely replacing some batteries It cost $ 1.8 billion.

That cost (an average of about $ 13,000 per vehicle) highlights a bet for automakers planning to power large numbers of vehicles using common platforms or battery cells. If there is a problem, it will be expensive.

That’s one of the reasons GM-wide officials have a positive attitude Working “24 hours” To fix the problem and secure future electric vehicles such as GMC Hummer EV And the Cadillac Lyric-two of the first GM models to use that Ultium battery-doesn’t have the same problem. They are also working on wireless technology that allows GM to detect potential flaws faster.

Mike Harpstar, GM’s chief engineer for electrification, told CNBC:Dig deeper Future Lyriq of car makers.. “It doesn’t create flaws or flaws, but it’s possible how packs and vehicles respond to it, and we’re very active in both of these aspects.”

The efforts of automakers extend beyond their own organization. Paul Jacobson, GM’s Chief Financial Officer, recently received a GM engineer LG Chem, Manufacture batteries, “clean up manufacturing process” and implement some “GM quality indicators” at LG factory.

GM on Announced fix on Monday Not only for the battery cell manufacturing process, but also for the updated monitoring software of the vehicle. Tim Grue, director of GM’s electrification strategy, told reporters on Monday.

GM is seeking reimbursement from LG, which produced defective parts at its plants in South Korea and Michigan.

New battery factory

Ultium batteries contain new chemicals and production processes compared to LG’s production and cells, but GM incorporates lessons learned from current production processes, such as safeguarding and monitoring new plants. I have.

“There are improvements to that process that we have learned from the current process,” said Harp Star, chief engineer for the Bolt EV propulsion system. “It’s not just at the cell level, it’s at the module level, the pack level. Everything I’ve done so far has been done with my partner LG. All of this learning goes here and the next level.”

Earlier this month, Grewe told CNBC that the new production was “less vulnerable” than what the company is currently doing.

“Pollutants everywhere can cause problems,” he said. “If you look at the battery plant we have today, there are all sorts of controls to look for it.”

GM CEO Mary Barra Last month, the new plant “applies all General Motors quality processes to the manufacturing process,” indicating that the company expects better quality control at the new facility.

“We work every day to make sure that what we’re doing is verified and tested. If you find such a problem, it’s also two rare in the same cell. If it’s a manufacturing problem, we’ll deal with it, “she said in an interview with CNBC on August 4. Squawk Box.

Barra emphasized that Ultium is a brand new battery system, but battery manufacturing is always more unstable than building a traditional vehicle. Batteries cannot simply be drained and filled later, as automakers can do with gasoline.

“The manufacturing process will really have to be strengthened,” Sam Abuel Samid, chief analyst at Guidehouse Insight, told CNBC earlier. “It’s part of the treatment of battery behavior. They don’t like heat and they don’t like pollution. They are very sensitive.”

Vermont police have released this photo of the 2019 Chevrolet Bolt EV, which ignited on the driveway of Democrat Timothy Briglin on July 1, 2021.

Vermont Police

Wireless surveillance system

According to GM, the “rare manufacturing flaws” of the Bolt EV are the tearing of the anode tab and the folding of the separator, which increases the risk of fire if they are in the same battery cell.

GM continues to steadily fix cell manufacturing, but vehicles with Ultium may be able to identify such issues sooner.

Specifically, the new battery cells will be able to communicate wirelessly, providing GM with additional data 24/7 to assess issues. By comparison, Bolt EVs cannot remotely make major updates to the software and only communicate when the vehicle is running or charging, officials say.

General Motors unveiled the all-new modular platform and battery system Ultium on March 4, 2020 at the Tech Center campus in Warren, Michigan.

Photo by Steve Fect of General Motors

“It’s all wirelessly updatable,” Grewe said. He added that wireless systems are likely to help companies determine if a problem exists “a little faster.”

He said that what wireless systems can do faster is to remotely reset the battery software to reduce the risk of fire. Currently, Bolt EV owners have to do it themselves or bring it to the dealer to reset the software.

The wireless battery monitoring system, standard on all Ultium vehicles, can also refocus the network of modules and sensors as needed to help protect battery condition throughout the life of the vehicle.

GM is working on the new Hummer EV to avoid battery defects

Source link GM is working on the new Hummer EV to avoid battery defects

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