New energy electric vehicle power battery overview

With the gradual lack of global fuel resources and increased environmental pollution, people's awareness of environmental protection has increased, and the call for environmental protection and resource conservation is growing. Countries around the world are developing new energy vehicles that replace traditional internal combustion engine vehicles. The electric vehicle has no pollution, the energy can be diversified, the noise is low, the energy conversion efficiency is higher than that of the internal combustion engine, and the utility model has the advantages of simple structure, low operating cost and relatively good safety, and represents a new generation of environmentally coordinated vehicles. The direction of development is becoming a new trend in the development of automobiles in the world today. However, the biggest constraint for the development of electric vehicles now comes from its energy storage device - battery. As the energy source of electric vehicles, power batteries are the core of the electric vehicle industry chain, and their functions are equivalent to the "fuel" of traditional automobiles.

The electric vehicle power batteries currently in use and under research and development mainly include: fuel cells, solar cells, chemical batteries and super capacitor batteries.

Fuel cell - the ultimate solution for electric car battery

1. Features

The fuel cell is characterized by high efficiency, cleanliness, and compatibility with renewable energy technologies. It works quietly, starts quickly, has a higher specific power, and the output power can be adjusted at any time. Compared with other electric vehicles such as secondary batteries (rechargeable batteries) powered by pure electric vehicles and hybrid electric vehicles, fuel cell vehicles have the advantages of long driving range and high power performance. The fuels used include pure hydrogen, methanol, ethanol, natural gas, and gasoline. When pure hydrogen is used as fuel, zero emissions can be achieved, fuel replenishment is rapid, does not undergo thermal process, and is not limited by thermal cycle. Therefore, energy conversion efficiency is high, which is 2 to 3 times that of ordinary internal combustion engine.

2. Status and prospects

The initial automotive fuel cell technology was limited to meeting automotive power requirements. Based on commercial expectations, its cost, longevity and hydrogen source issues were gradually being noticed. The use of fuel cells as the driving force of automobiles has been recognized as an inevitable trend in the long run. But in the short term, fuel cell vehicles are difficult to compete with other cars in terms of price. At present, research and development of fuel cells focus on four aspects of electrolyte membranes, electrodes, fuels, and system structures. Accelerating the development of solid oxide fuel cells is inevitably the general trend of energy development in the world. Globally, fuel cell vehicles are still in the stage of commercialization. Solving the three challenges from life, cost and hydrogen source is the key to current R&D innovation.

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