The symbols indicate where electricity will soon be available: two parking spaces have been reserved on the redesigned eku square; here, two electric cars will be able to charge their batteries simultaneously at a charging station. Jurgen ohrlein, on the other hand, wonders: what is the filling station doing above ground, where it is exposed to the blazing sun – and not in the underground car park below, i.E. In the shade??
The engineer and electro-pioneer from rothwind, who drives two renault electric vehicles, uses physics and chemistry to make his point. "The municipal utilities should actually be aware that at temperatures above 35 degrees celsius, the charging process – regardless of the type of battery – no longer proceeds without complications. You know that from a cell phone too. It can take much longer than normal until the battery is full, sometimes the charging process can rub off completely, then nothing works anymore."
Cities like bamberg had taken this into account when installing the e-charging stations and, for example, moved them to the underground car park at the concert hall.
Ohrlein says that it doesn’t even take a midsummer like the one kulmbach has experienced in recent weeks to reach the critical 35 degrees. "I quickly reach 35 degrees and more, especially with dark vehicles." In addition, the heated pavement emits additional heat, which in turn affects the battery, its capacity and ultimately its service life.
The wellbeing temperature
Kulmbacher gets support from experts like erlanger e-mobil expert frank juhlke. "The absolute comfortable temperature of a battery is between four and eleven degrees", juhlke, who drove one of the first electric cars ever made in germany. Some types of vehicles have separate battery air-conditioning that kicks in while charging or driving. Juhlke recommends plugging in the car at the charging point in extreme weather – even high eave temperatures – and using the battery air conditioning until you can continue driving. The more optimal the ambient temperature, the more trouble-free the use of the battery.
Manufacturers recommend shade
Even battery manufacturers recommend that electric car owners park their vehicles in the shade or on a meadow instead of on asphalt on hot days in order to minimize the heat radiation. Underground garages are the first choice. The same applies, by the way, to the time of recharging.
The question remains: why are the charging columns located in the heart of kulmbach, where they are exposed to wind and weather?? "The location of the charging columns was discussed extensively with the planners, our civil engineering department, the municipal utilities and bayernwerk", writes press spokeswoman ulrike michael in response to a BR inquiry. In the end, the decision was made "because of the better accessibility to the saule" decided on the site itself for the parking spaces. "If storms occur, the charging station’s system ensures an emergency shutdown." The charging station will be equipped with two connections and have a charging capacity of 22 kilowatts. For the time being, the city of kulmbach provides charging at the saule free of charge. With this saule, there will then be four filling stations provided by the city of kulmbach – in cooperation with partners – in the city area.
"Loading net fully sufficient"
That, in turn, is good news for jurgen ohrlein. The charging network in the region is, in his opinion, "fully sufficient" for the demands of e-mobilists. However, he considers the city’s reasoning regarding the placement of the lighthouse to be incomprehensible. "It seems to me that the charging station was simply forgotten and was only added on request. And what good is a ‘gas station’ that automatically shuts off when the sun shines?? At least a roofing with solar cells – adjustable for the beer festival – would have been appropriate, otherwise it makes no sense."
Not yet exhausted
The former district councillor for the greens sees the development of electric mobility as far from exhausted, however. Especially against the backdrop of the still shorter range of electric cars compared to internal combustion engines, he pleads for new approaches. "The rule family usually has two vehicles anyway. The electric car could be used for short daily journeys, but a hydrogen-powered car is more suitable for long journeys, especially on the freeway."
The electricity for electrolysis, which splits water into oxygen and hydrogen, would actually be available in sufficient quantities. "We have many wind turbines in the north sea, some of which are nonsensically shut down because the electricity does not reach the grid. There is a lot of wasted energy." Hydrogen, on the other hand, can be stored for a long time and made available in coarse quantities at gas stations, for example.
There are also new solutions for the gas station at home, says ohrlein. An austrian company has launched what it claims is a non-toxic, maintenance-free saltwater battery that allows private individuals to charge their electric vehicles with electricity generated by photovoltaic systems.
"There are many developments underway. I am sure we could be much further along by now. Unfortunately, the car lobby has prevented many things or kept them under wraps", says the engineer. He also hopes for the research of the new institute for battery technology, which was recently inaugurated at the university of bayreuth.