Can an electric car run 300 kilometers with salt water?

By injecting nearly 300 milliliters of salt water into a plastic box about 20 centimeters in length and width, and putting 40 such boxes together, you can generate the electricity that drives an electric car? It sounds amazing, but the student creative team "Magnesium Magnesium" from Changsha University of Science and Technology's School of Materials has done so. Recently, the project won the "CCB Cup" the third Hunan "Internet +" college student innovation and entrepreneurship competition creative group gold medal.

Battery injected with salt water.

Can make cars run 300 kilometers

Xiongyin, a member of the innovation team at Changsha University of Technology's School of Materials, is injecting salt water into plastic boxes

"This is a set of magnesium air batteries that can drive the car for more than 300 kilometers after being injected with salt water. On August 10th, Dr. Hehao, a teacher of the "Magnesium Magnesium" innovation team, pointed to a four-wheel electric car and said, "We called it 'Wangjiawan No. 1' and it has been successfully tested two days ago. "Hehao said that there are still problems such as incomplete construction of charging piles and slow charging speed in electric vehicles. Magnesium air batteries can be designed as backup power supplies, emergency lighting equipment, and plug and play." Magnesium air batteries do not need to be charged. Can generate current. "

As early as the 1960s, magnesium air battery technology has been used in the military field, especiallyspecials,speciales and other weapons. Hehao says the core technology for magnesium air batteries lies in air electrodes. This electrode is made of catalysts, binders, and other materials. It is the positive electrode of a magnesium air battery. As a negative electrode, the magnesium plate can be large or small. The larger the magnesium plate, the greater the amount of electricity generated. "When using a magnesium air battery, insert a magnesium plate into the box and inject salt water into the battery. The battery can generate electricity and pull the salt water out when it is not used. Until the metal magnesium is exhausted, the battery is used up. After the metal magnesium plate is consumed, it can be replaced and used again. "The team member Jin Fan introduced that the battery magnesium plates they designed for" Wangjiawan No. 1 "are all 20 cm in length and width. The appearance is a plastic box.

So how does this battery work in cars? This needs to be made into a battery pack. The team assembled 40 batteries that, in series, could generate enough power to drive an electric vehicle. "It generates about 18 degrees of electricity and can drive this car for more than 300 kilometers. "Hehao said. After the batteries were assembled, they began the "heart change" work of electric vehicles -- replacing the original lead-acid battery of an electric four-wheel scooter with a "Magnesium Magnesium" self-made magnesium battery. On August 8, the electric four-wheel scooter was successfully modified and the test drive was five kilometers. All power indicators were normal. Hehao believes that the modified scooter energy is more durable, lighter, and more environmentally friendly. In the next step, they will further improve the power supply, so that magnesium air batteries really into life.

"Super Mobile Charging Station"

To solve the immediate needs of the disaster area

In fact, these magnesium air fuel cells also played a significant role in the flood relief site in Changsha in July. Team member Zhuhuanwen said that in order to support the flood during the smooth communication and electricity protection, they rushed overnight to make a batch of magnesium air batteries "super mobile charging power station" and a set of emergency flashlight charging equipment. Compared to the common charging device, this charging device is much more "powerful" -- less than 2 kilograms, adding salt water to generate electricity, and charging 8 to 10 mobile phones quickly. A set of metal magnesium plates can meet the electricity demand of nearly 100 mobile phones. In this way, they solved the problem of the duty guard staff, the power supply of the surrounding mass communication equipment and the charging of the emergency flashlight in the Baimiaozi community of Yanghu Street in Changsha.

Zhang Guoqiang, Secretary of the Party Committee of the School of Materials of Changsha University of Technology, told reporters that in addition to designing charging treasures and batteries, the team is also designing an LED light that can shine when touching water at the research and development base in Wangjiawan. This small light is especially suitable for night lighting in the wild. Hehao plans to make tens of thousands of such LED lights and donate them to the Red Cross for use in field emergencies.

"Going out of the laboratory and really applying the experimental results to the actions of serving the society really feels the power of scientific and technological innovation. "Zhuhuanwen laughed and said that during the summer vacation, all the team members gathered at the" R&D base "in Wangjiawan. The girls even took a bus from a school of 17 kilometers to the base every day. "It may be boring for others to take the bus from the dormitory to Wangjiawan every day to study batteries, but this is my dream and it is lucky to meet a group of like-minded friends. "

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