The battery is the heart of the electric car. Fraunhofer researchers have developed an energy storage device which is significantly more cost-effective over the entire life cycle in comparison with previous models. If one of the more than one hundred battery cells is defective, it can be replaced easily. Until now, the entire battery had to be replaced.
The core of electric cars are their batteries. So far, these have been monolithic blocks in which the individual battery cells as well as the necessary technology have been housed. All individual cells should theoretically be able to save the same amount of energy. In practice, though, this is somewhat different: due to production reasons, their capacities vary. This is problematic, since the cells are connected in series. The entire battery is therefore only as strong as its weakest cell. If this cell is “empty”, the remaining energy in the other battery cells does not help – the car has to be recharged. For that reason, manufacturers presort and install cells of a similar capacity into a battery. Since some cells are sorted out as a result of this process, and this pushes the price of the batteries up. Another shortcoming is that when a cell is defective, the vehicle stops functioning. That means that the entire energy storage device has to be replaced.
Independent battery cells communicate with each other
Researchers at the Fraunhofer Institute for Manufacturing Engineering and Automation IPA in Stuttgart have now created an alternative. “Our modular battery system solves these problems,” says Dr. Kai Pfeiffer, Group Manager at the IPA. The trick: each battery cell has its own built-in microcontroller that records relevant physical parameters, such as the temperature and the state of charge of the cell. As a result, each cell knows what condition it is in. The cells “talk” to each other via the existing power wiring between battery cells. This is known as power-line communication. They can also communicate with other devices, such as the on-board computer, which uses the data from the cells to calculate how much remaining energy the entire battery still has, the so called state of charge.
If a cell is empty, but the others still have energy stored, the car does not have to stop, like it did before. Rather, the empty battery cell simply decouples from the cluster, acting like a current by-pass. The others continue to deliver energy. “Depending on the cell quality, we can therefore increase the range by at least four percent,” explains Pfeiffer.“ Over time, this effect is amplified: in the case of an old battery, and if the empty cells are replaced, it is conceivable that a range up to ten percent higher can be achieved”.
Since one cell with lower capacity hardly affects the overall range of a car, the manufacturers no longer need to pre-sort it. This should significantly reduce costs. In addition, the capacities of the cells adapt to each other over time. This is because the ones that can store less energy are switched off earlier. The cells therefore run longer and, as a result, faster: their capacity decreases. And if a battery cell malfunctions, it is not necessary to bring the vehicle to the workshop. Since the car has more than one hundred cells, it does not depend on any individual one. And if the driver decides in favor of a repair, it is sufficient to merely replace the single cell instead of the entire battery.
Read more: Electric cars: batteries with brains
The Latest on: Batteries with brains
via Google News
The Latest on: Batteries with brains
- Man charged with severely beating child, woman in the Twin Citieson July 23, 2021 at 6:19 pm
A local man is jailed in McLean County after a grand jury indicted him on charges he beat a child. Court documents say Lance Cotton, 29, beat the child repeatedly starting in December 2019, causing ...
- Medtronic launches Percept PC DBS system for patients with Parkinson’s disease, Essential tremor, Dystonia and Epilepsyon July 23, 2021 at 5:49 am
In addition to BrainSense technology, the Percept PC DBS system features several leading-edge innovations, including the only DBS system eligible for 3T and 1.5T full-body MRI scans, providing ...
- Boy recovering from brain tumor meets his Cardinals heroon July 22, 2021 at 3:26 pm
Not all heroes at Busch Stadium wear a Cardinals uniform. Seven-year-old Henry Nix and his family arrived early for a chance to meet his favorite home run hitter. "We're just really grateful for this ...
- Are Wireless Earbuds Bad For Your Brain And Hearing?on July 20, 2021 at 9:03 am
While wireless earbuds make taking calls, watching videos and listening to music on the go more convenient, can these earbuds be bad for your hearing? Here’s what you need to know.
- Study Highlights Cognitive Challenges Among Patients With POMSon July 19, 2021 at 8:41 am
Research indicates those with pediatric-onset multiple sclerosis may have reduced memory performance compared with healthy controls.
- The Crucial Role And Unusual Story Of Electroencephalography, Almost A Century After Its Inventionon July 9, 2021 at 7:12 am
The sensors are measuring the voltage fluctuation between neurons, the brain's cells. These fluctuations are caused by currents that, unlike those you get from batteries, change over time.
- Solarwatt flexes muscles in home energy storage fight with Shell, Teslaon July 6, 2021 at 11:26 pm
"The energy manager is the brain of the home," Peter Bachmann ... such as rooftop panels, batteries, electric heat pumps and EV-charging boxes. It follows a home storage battery deal with BMW ...
- A Human Battery: The World Is One Step Closer To Wearable Energyon July 1, 2021 at 10:14 am
Unfortunately, all these methods come with key limitations: Batteries need to be constantly ... human skulls that can directly connect to the brain using robot surgeons. But who wants their ...
- Mi 11 Lite review: Beauty with brainson July 1, 2021 at 3:21 am
The Mi 11 Lite offers an all-day battery life on a single charge. It comes packed with a 4250mAh battery with support for 33W fast charging support in the box. The phone could charge up completely ...
- EV battery supplier Panasonic sells Tesla stake, in pivot to boost its own braintruston June 28, 2021 at 7:50 pm
Panasonic sold its entire stake in key battery customer Tesla—worth an estimated $3.6 billion—last fiscal year, Nikkei Asia reported Friday. The move gives Panasonic funds for new strategic ...
via Bing News