Batteries are the source of power for electric vehicles and they have also been a key factor in restricting the development of electric vehicles. The main performance indicators for electric vehicle batteries are specific energy (E), energy density (Ed), specific power (P), cycle life (L), and cost (C). To make electric vehicles competitive with fuel vehicles, the key is to develop high-efficiency batteries with high specific energy, high specific power, and long service life.
The main performance indicators for electric vehicle batteries are specific energy (E), energy density (Ed), specific power (P), cycle life (L), and cost (C). To make electric vehicles competitive with fuel vehicles, the key is to develop high-efficiency batteries with high specific energy, high specific power, and long service life.
The energy management system is the smart core of electric vehicles. A well-designed electric car, in addition to good mechanical properties, electric drive performance, and an appropriate energy source (ie, a battery), should also have an energy management system that coordinates the work of each functional part. Its role is to detect individual The state of charge of the battery or battery pack, and based on a variety of sensing information, including force, acceleration and deceleration commands, road conditions, battery conditions, ambient temperature, etc., reasonably deploy and use limited on-board energy; it can also be based on battery Group usage and charge/discharge history select the best charging method to maximize battery life.
The draft of the "Automobile and New Energy Vehicle Industry Development Plan (2011-2020)" said that in the next decade, the central government will invest 100 billion yuan to support the research, development, and promotion of core technologies for energy-saving and new energy vehicles. It is planned that by 2020, the industrialization and market scale of China's new energy vehicles will reach the top in the world, and the number of new energy vehicles will reach 5 million.
News of the Ministry of Commerce website released on July 20th: According to McKinsey’s latest “Electric Vehicle Index†released in July, China’s ranking has risen to third place, tied with Germany, and significantly better than the previous index. In the seventh place, the top two are the United States and France, and Japan, South Korea, Italy and Denmark are ranked behind China and Germany. McKinsey pointed out that the Chinese government has adopted a series of support and incentive measures to promote the production and sales of electric vehicles. Chinese automobile manufacturers have also expanded their existing electric vehicle series and production.
Operation of electric Pressure Cooker
1. When using the electric pressure cooker, take out the inner tank of the pressure cooker, and then put the ingredients into the inner pot. At the same time, the food and water shall not exceed 4 / 5 of the height of the inner pot, and the food that is easy to expand shall not exceed 3 / 5 of the height of the inner pot. After adding the ingredients, users can add an appropriate amount of water according to their own needs;
2. After the ingredients are put into the inner pot, put the inner pot in the outer pot. When putting into the inner pot, wipe the heating plate of the inner pot. At the same time, when putting into the inner pot, ensure that the inner pot and the heating plate are in good contact.
3. After preparation, check whether the sealing ring has been placed when the pressure cooker lid is closed. At this time, rotate the sealing ring left and right by hand to place it on the steel ring, and rotate it counterclockwise to the buckle position when the lid is put down. 4. After placing the pot cover, turn the pressure limiting vent valve of the electric pressure cooker to the sealing position, and check whether the float valve is placed properly.
5. Connect the power supply of the electric pressure cooker, the indicator light of the electric pressure cooker is on, and set the pressure holding time according to the food.
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