Appearing a layer of seemingly ordinary black material on the outside of the battery can actually solve the problem caused by the uneven heating of the battery. After the technology was applied to the battery, the developer thought it was better than the battery used by the now-famous Tesla electric vehicle.
Not long ago, the Wanjin Venture Team (hereinafter referred to as “Wanjinâ€) under the Guangdong Wanjin Technology Co., Ltd. won the third prize of the third China Innovation and Entrepreneurship Competition in the new energy and energy conservation and environmental protection industry. This is the only team in Guangdong Province that entered the finals except Shenzhen.
Behind it is the epitome of its parent company Guangdong Weilun Knitting Co., Ltd. (hereinafter referred to as "Weilun Knitting") marching into emerging industries. In the tide of traditional industries seeking to break through in the wave of industrial restructuring and upgrading, Wei Lun Knitting in the tide of the "thump" a new future.
Aiming at the problem of thermal runaway of electric vehicle batteries
The China Innovation and Entrepreneurship Competition for New Energy and Energy Conservation and Environmental Protection Industry is the highest-level innovation and entrepreneurship competition in China. This year, a total of 8,759 companies and 3,746 teams participated in the event. Eventually, 925 companies and teams participated in the competition for new materials, biomedicine, new energy, energy conservation and environmental protection, advanced equipment manufacturing, electronic information, internet and mobile internet. finals.
There are 28 teams in the finals of the new energy and energy conservation and environmental protection industry. Wanjin is one of them. Wanjin was established in July this year. They cooperated with Guangdong University of Technology and set up a research and development base to develop various thermal management system technologies for electric vehicles.
Why research in the direction of electric vehicle batteries? According to Zhang Guoqing, head of Vanke Power Battery Thermal Management Technology R&D and a doctoral advisor at Guangdong University of Technology, he once served as the head of the Shenzhen BYD electric vehicle battery group. In the course of his work, he saw the future market potential of electric vehicles and saw it. There is a technical bottleneck.
Zhang Guoqing said that at present, electric vehicles are generally used lithium batteries, it will generate a lot of heat in the automotive process, the temperature even exceeds 100 degrees Celsius, if the cooling technology can not reduce the temperature, the battery generates high temperatures easily lead to auto-ignition. Between 2010 and 2013, Urumqi, Hangzhou, Shanghai, Shenzhen, and the United States have also caused the burning of electric vehicles due to the high temperature of lithium batteries.
He said that lithium battery cooling for electric vehicles mainly uses air cooling and liquid cooling technologies. Both of them have drawbacks, air cooling effect is not ideal, and liquid cooling technology has high cost, complicated process, and safety risks caused by liquid leakage.
Wang Shaohui, who is one of the heads of the Vanguard startup team, also stated that this year is the first year of electric vehicles. It is not new. In the past, many dedicated vehicles such as golf carts, electric vehicles, and logistics vehicles used batteries, but the battery was very Big development bottleneck, Tesla also dared to make a car because of battery technology.
Plan to achieve large-scale production within 5 years
Wang Shaohui said that through three aspects of analysis, they found that the existing batteries have a lot of problems, among which safety is the first to bear. Among them, they found that Tesla also has such defects, mainly in the charge and discharge of batteries. Short circuit, fire, etc. caused by high heat.
He stated that the technology applied by Tesla is currently the most advanced technology in the world. However, Tesla has realized that there is a problem with the high heat generated when the battery is charged and discharged. Therefore, many water pipes are used. After cooling the compressor instantaneously, the water is absorbed by the water through the water pipe. However, there are more than 8,000 batteries in a car, and it is costly to use a lot of water pipes around it, so Tesla has a high price. "But the corresponding battery costs, maintenance costs, and management costs are also high. The battery and water are very conductive. When a collision occurs, water can easily leak. This presents a great safety risk."
"The material we use is solid, and we use solids to solve the hot replacement of water." According to its introduction, Wanjin's phase change material management technology for this competition is mainly used to solve the power battery module (package) for electric vehicles. Problems caused by uneven heat. This phase change material is a solid shape that can absorb heat, shorten the time when the battery is at a high temperature, keep the battery temperature consistent, prevent thermal runaway, and enable secondary heat dissipation to release heat.
"To put it plainly, this is a study of battery thermal management, but our technology is stronger than Tesla." Wang Shaohui said that Wanjin phase change material management technology is currently the leading domestic and international one. The project has now developed a battery pack with a car brand and entered the technical testing phase. Future products will be applicable to depots and battery pack manufacturers, power grids or buses, taxis and other fields.
He also told reporters that now technology has attracted the attention of foreign countries, Japan's battery factory has come to discuss cooperation. They are also preparing to apply for related patents in Japan and the United States.
Wang Shaohui said that the Wanjin team plans to achieve large-scale production of the product within five years and form a brand image of the product and continue to subdivide the product market. (â— Gao Yihua Liu Jialin)
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