China's new energy vehicles started with bus buses and were basically hybrid technology from 2002 to 2013. Tested from series, parallel, and hybrid, but the planetary gears have not been used for coupling (mixing) technology. Basically, the clutch power coupling technology is adopted. Because the domestic clutch power coupling technology is basically out of control, and the mechanical automatic clutch of the American Eaton hybrid bus has been promoted, but his price is relatively high, and it is not popular. Some domestic companies have made many innovations based on the technology of Eaton in the United States. However, the quality of the product is difficult to compare with Eaton. After more than 10 years of hard work, the quality of domestic mechanical automatic clutch has also improved a lot.
For a hybrid bus to be successful, it must overcome three difficulties at the same time, that is, the engine system, motor system, and power coupling (hybrid) technology must be the most advanced in the world. This is basically impossible for the Chinese automotive industry.
The annual production capacity of Chinese buses is around 150,000, and the production of bus buses is between 50,000 and 70,000. The engine system, motor system, and power coupling (hybrid) mechanism of the bus manufacturer are basically externally extracted. China's buses are basically domestic sales, and their prices are the lowest in the world. The engine system, motor system, and power coupling (hybrid) mechanism required for China's power hybrid bus must be the most advanced. This is basically impossible.
Pure electric buses bring hope to the development of Chinese car "curve overtaking""Curving overtaking" is a metaphor. Some colleagues explain that "overtaking at a corner" is wrong. Traffic rules clearly stipulate that no overtaking can be made at corners, but "no overtaking for corners" is not stipulated. The basic way to overtake is to "curve." How do pure electric buses overtake?
1. Avoiding the engine system must be the most advanced, avoiding the power coupling (mixing) mechanism must be the most advanced two difficulties;
2. The motor system must be the most advanced, and China is the same as abroad. This is a must. It turned out to be three difficulties, and now the other one is difficult.
3. The most difficult electric bus is the motor system, and then the in-depth analysis is the "power battery." China's power battery technology and products are in the first echelon in the world. The conclusion is that the technology of China's pure electric buses is the most advanced.
The bottleneck that can not be used in China's pure electric buses is also the power battery. The lithium iron phosphate power battery has been charged more than 2,000 times, that is, it is basically guaranteed for 8 years. The specific energy of the monomer has reached 140 wh / kg, and the system specific energy has reached 100 wh / kg. This indicator is a relatively high probability event of the bus. Basically, it can meet the requirements, but there are certain gaps in dealing with small probability events.
On the way to wait for the progress of China's power battery, bus manufacturers have given full play to their subjective initiative, such as carrying out lightweight research and improving the continuous mileage of pure electric buses; and reducing the labor intensity of multi-frequency charging of bus companies through the convenience of charging. At present, the mature technology has online charging technology, and arranges double-gun fast charging technology for special personnel.
The conclusion is: China's pure electric buses are technically the most advanced and can be used.
Gigabit Standard Managed POE Switch
24 port PoE 10/100/1000M managed network switch/poe switch/10/100/1000M 24 port POE
Managed POE Switch is designed for Video surveillance and network project system,etc.it provides 24x100Mbps Ethernet ports; 2x10/100/1000Mbps ports &2x1000 Base-X SFP optical fiber port as uplink ports; supports Web& CLI management,two layer network management and POE Intelligent management; supports data wire-speed and Jumbo Frame forwarding .Port based VLAN function can effectively prevent whole system from broadcast storm so that make the date transfer safer.The 16*10/100Mbps POE Switches complies with IEEE802.3 af/at standards,it simplifies wiring,avoids the troublesome of installing power socket for powered devices,such as
Features:
- Provide 24x 100Mbps ports; 2x10/100/1000 Mbps port & 2x1000 Base-X SF Poptical fiber port as uplink ports
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- Support L2 switching function,including 802.1QVLAN,port mirroring, port isolation,IGMP Snooping function.
- LLDP,POE+Management and ARP detection.
- Support WEB,CLI,TELNET&SNMP management
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Application:
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Gigabit Standard Managed Poe Switch,8 Port Poe Switch,250M Poe Transmission,Giga Managed Power
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