Schlagwort-Archive: Battery

CATL Successfully Testing Condensed Batteries in Electric Aircraft

CATL announces electric aircraft range breakthrough and advances in sodium-ion battery technology, revolutionizing sustainable air travel. At the 15th Annual Meeting of the New Champions of the World Economic Forum, CATL’s chairman, Robin Zeng, made a groundbreaking announcement that could reshape the future of aviation. CATL tweeted on the X platform: „Another focus of our technology development is high energy-density batteries. Our condensed batteries, achieving up to 500 watt-hours per kilogram, are currently being tested in planes, allowing 4.0-ton aircraft to take off. We aim to support 8.8-ton aircraft next. By 2027 or 2028, we expect four-seater private jets to use these batteries, with a standardized range of 2,000 to 3,000 kilometers, making them feasible for private and business jets.“

CATL’s significant progress in their civil, electric manned aircraft cooperation project marks the first public disclosure of the range capabilities of CATL’s electric aircraft, highlighting a substantial advancement in aviation technology. According to the company, the 8-ton model is expected to be operational between 2027 and 2028, featuring a range that could revolutionize regional air travel. The key to this advancement lies in CATL’s cutting-edge condensed-state battery technology, boasting an energy density of 500Wh/kg. This energy density is double that of current electric vehicle (EV) power batteries, which typically offer around 250Wh/kg and meet the strict energy requirements for regional aircraft.

This development signifies a significant leap in the aviation industry, potentially leading to more sustainable and efficient air travel options. The high energy density of the batteries means that electric aircraft could become a viable alternative to traditional fossil fuel-powered planes, significantly reducing carbon emissions and operating costs.

New generation of sodium-ion batteries
In addition to developing electric aircraft, CATL is also focusing on enhancing its battery technology across various applications. During his participation at the Annual Meeting of the New Champions, Zeng also disclosed that the company is advancing its sodium-ion battery technology, which is expected to offer better cost, lifespan, and low-temperature operation performance, with the anticipated growth and potential of sodium-ion batteries. According to Zeng, these batteries could be launched as early as next year, with the technology already at a developmental stage rated at level 7 out of 10. He stated, “This new generation of sodium-ion batteries will help not only in terms of cost but also on the low-temperature performance.”

With the introduction of condensed state and sodium-ion batteries, the potential applications range from more efficient EVs to advanced energy storage solutions. CATL’s progress in electric aircraft development underscores its role in driving forward sustainable technologies. As the aviation industry looks towards a greener future, CATL’s electric aircraft could be a game-changer, offering a glimpse into a future where air travel is both efficient and environmentally friendly.

The future of electric aviation holds immense promise, with potential benefits including reduced carbon emissions, lower operating costs, and increased efficiency. As technology advances, the vision of electric-powered flights becoming a mainstream mode of transportation is increasingly within reach. Innovative efforts like the ones by CATL pave the way for a new era in aviation, where sustainable and efficient air travel becomes a reality, ushering in a cleaner and greener future for the aviation industry. Source: ‚Battery Tech Online‚.

Never Jump-start a Dead Battery

The pilot arrived at the airport ready to fly home after having been away for the weekend seeing a child off to college. While performing the preflight, he noticed that the stall warning wasn’t sounding. The source of the problem was obvious as soon as he looked at the instrument panel: The master switch had been left on…for two full days.

Author Jeff Simon

The battery was so depleted that it was impossible to sound the stall warning or even engage the master solenoid. Anxious to get home and knowing that it would be challenging to get help on a Sunday, the pilot began to rationalize shortcuts to get home quickly. With VFR conditions forecast for the duration of the flight home, he thought that the risks of jump-starting the airplane and flying home were minimal. At his request, the ground crew at the FBO brought over a tug and hooked it up to the external power plug on the airplane. At first, there wasn’t even enough power to move the propeller, so they revved the engine of the tug and waited a bit. Finally, the dead battery and the tug produced enough power between them to drive the starter, turn the prop, and get the engine started. The cart disconnected, and the pilot let the airplane idle and assessed the situation. The ammeter was showing a very strong charge as the alternator fed the battery, but all seemed well otherwise, so he took off for home.

At first, things seemed to be going well. However, approximately 25 minutes into the flight, the pilot heard a “click” and the alternator went offline. Then, a distinct smell of something electrical burning entered the cockpit. The pilot called air traffic control and asked to return to the airport, notifying them that he might also lose radio communications. Fortunately, he remained calm, ensured that the landing gear came down properly, and made a safe landing back at the departure airport.

According to Chris Holder, Eastern U.S. sales manager at Concorde Battery, the only safe way to proceed is by following the structured approach of evaluating and charging the battery as detailed in the battery maintenance manual. That begins by measuring the open circuit voltage (OCV) of the battery. For Concorde’s RG Series of batteries, an OCV at or above 12.5 volts, but below 12.75 volts, for a 12-volt battery (25.0 – 25.5 volts for a 24-volt battery) means that the battery requires a constant voltage charging procedure (per the manual) before use. That process takes at least three hours and could be much longer depending on the amount of discharge. For batteries with an OCV below 12.5 volts for a 12-volt battery (25 volts for a 24-volt battery), the battery must go through a special charging and capacity test procedure detailed in the Concorde maintenance manual to determine if it is airworthy.

As a matter of fact, if a battery’s OCV is below 9 volts (18 volts for a 24-volt battery), it is likely permanently damaged. As batteries get to this state of “deep discharge,” the internal cells can reverse polarity and become unrecoverable.

Aircraft battery design is a balancing act between weight, power capacity, and durability. Beyond starting the engine, the primary function of the battery is to provide a reserve of electrical power in case the alternator fails, allowing pilots to navigate, communicate, and get the aircraft back on the ground safely. In order to do this, it must be airworthy before the flight. It’s a recipe for disaster to assume that the alternator will charge the battery during flight.

In this particular case, the alternator and voltage regulator most likely struggled to work with a severely depleted battery. As the regulator tried to keep up and maintain bus voltage, the voltage may have spiked and tripped the voltage regulator’s over-voltage cutoff, sending the alternator offline. The same voltage spike likely took out the alternator-out warning module, which was found to be internally shorted, causing the smell of something burning in the cockpit until its own power fuse blew.

The pressure to get home can be significant. The best way to protect yourself when you’re stranded away from home and feeling that pressure is to reach out to someone else for advice. Take a moment to phone a friend, call your mechanic, or reach out to a service such as Savvy Maintenance’s breakdown assistance service. Cooler heads always make better decisions. Until next time, I hope you and your families remain safe and healthy, and I wish you blue skies. Source: ‚Jeff Simon / AOPA‚.