1, BYD: The company's energy storage power station with lithium iron phosphate battery technology as the core has obvious advantages in terms of cost and operating life compared with the existing energy storage technologies such as pumped storage and compressed air storage. In 2020, the company achieved a total revenue of 654.38+056.6 billion, a year-on-year increase of 22.59%; Achieve a gross profit of 30.35 billion, with a gross profit margin of19.38%; The operating cash flow per share is 16.6387 yuan.
2. Research institutions: single well circulating shallow geothermal energy technology, underground compressed air energy storage technology, underground carbon dioxide energy storage technology, underground pumped storage technology, coal mine energy comprehensive management technology, gas extraction power generation technology, intelligent charging pile application technology, etc. In 2020, the company achieved a total revenue of 65.438+88.6 million, a year-on-year increase of 654.38+09.45%; Realized a gross profit of 778 million and a gross profit margin of 465,438+0.26%; The operating cash flow per share is 1. 1907 yuan.
3. Jintongling: Jiangsu Jintongling Hydrogen Energy Machinery Technology, a wholly-owned subsidiary, is engaged in the research and development of hydrogen energy fuel cell compressors and hydrogen energy backup emergency power supply, and signed the Cooperation Framework Agreement for Hydrogen Energy Industry Investment Projects with Rugao Economic and Technological Development Zone to invest in the research and development of fuel cell air compressors and hydrogen energy backup power supply, smart energy island, hydrogen refueling station, biomass hydrogen production base, compressed air station and other projects; /kloc-in 0/9, it signed a contract with CELEROTONAG Company of Switzerland, and both parties decided to jointly develop hydrogen fuel cell compressors (including compressors, motors and frequency conversion controllers). In 2020, the company achieved a total revenue of 65.438+0.436 billion, a year-on-year increase of-23.63%; Realized a gross profit of 338.2 million and a gross profit margin of 23.55%; Operating cash flow per share -0.0374 yuan.
1, compressed air, that is, air compressed by external force. Air is compressible, and the air whose volume is reduced and pressure is increased by the mechanical work of the air compressor is called compressed air. Compressed air is an important power source. Compared with other energy sources, it has the following obvious characteristics: clear and transparent, convenient transportation, no special harmful performance, no fire danger, no fear of overload, it can work in many unfavorable environments, and the ground is full of air.
2. Air occupies a certain space, but it has no fixed shape and volume. When pressure acts on the air in the closed container, the volume of the air is compressed and the internal pressure increases. When the external force is removed, the air will return to its original volume under the action of internal pressure. If there is a movable object in the container, when the air returns to its original volume, the object will be pushed out and ejected by the pressure of the air in the container. This principle is widely used in production and life. For example, injecting compressed air into the ball, the more air, the harder the ball; When compressed air is filled into the tire, the tire can bear a certain weight. For large cars, use compressed air to open and close the doors and brakes; The hydraulic press uses compressed air to pressurize the water. In the factory, compressed air is used to start the air hammer to strike iron. In the coal mine, it can start the pneumatic pick to drill holes. It is also used for pipeline transportation of liquid and granular objects.