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release time:2024-03-01 Hits: Popular:AG11 battery
Battery management focuses on efficiency, automotive-grade applications still have multiple obstacles
Guests:
Brian Black, Product Marketing Manager, Signal Conditioning Department, Linear Technology Corporation
Liu Peng, Texas Instruments Automotive Electronics Mixed Signal Product Market Development Manager
Yin Shusheng, General Manager of Beijing Aosiyuan Technology Co., Ltd.
Wang Liang, Sales Manager of Beijing Core Power Technology Co., Ltd.
Hybrid vehicles provide my country with a good opportunity to catch up
●It can be expected that investments and improvements in battery energy density and efficiency will continue, and the HEV/EV market will continue to grow globally.
●As a "zero-emission" technology, pure electric vehicles provide a better platform for our country to catch up with foreign technologies.
Brian Black: Concerns about climate change are just one of the many factors driving the development of hybrid electric vehicles (HEVs) and electric vehicles (EVs). Another driving factor is improving energy efficiency and improving air quality through the use of alternative energy sources. and reducing emissions, a third driver is the desire to switch more easily between fuel energy sources when their relative availability changes.
Hybrids and electric vehicles are still in their early stages of development and may take different paths due to trade-offs between range, cost and user-friendliness such as recharging methods and times. However, it can be expected that investments and improvements in battery energy density and efficiency will continue, and the HEV/EV market will continue to grow globally.
Yin Shusheng: The development of China's hybrid electric vehicle market will show rapid growth in 2010, and the HEV/EV market will continue to grow globally. Pure electric vehicles should be the mainstream development of official cars and private cars, and battery packs should be provided to electric vehicle users in the form of leasing to reduce car purchase costs, use and maintenance costs.
This market will be dominated by plug-in hybrid electric buses, which use a smaller high-efficiency power generation system and fewer lithium-ion battery packs to provide energy for the entire vehicle. Such an overall energy supply system can further reduce the cost of the hybrid system. Volume and weight. In addition to gas-electric hybrid vehicles, another solution is gas-gas hybrid, which uses a fuel generator and a high-pressure pneumatic transmission system to jointly provide power for the entire vehicle.
Wang Liang: Pure electric vehicles, as a "zero-emission" technology, provide a better platform for our country to catch up with foreign technologies. The starting time at home and abroad is basically the same. In some aspects, our country is already in a leading position and has good advantages. market expectation. Combined with the current situation, it can be foreseen that new energy vehicle technology, especially pure electric vehicle technology, will gradually mature in our country, and the market will gradually improve and develop. Only by making full use of the long-term achievements in power battery research, especially breakthroughs in key power battery and battery pack technologies, can our country be able to better establish its late-mover advantage and make a major leap in electric vehicle technology.
Development model of new energy vehicles in my country
Battery management unit improves battery usage efficiency
●Battery metering management is to carry out statistics on the charge and discharge of the battery and provide the data to the vehicle management system; the charging management unit implements monitoring functions for charging and discharging of the battery pack.
●Secondary battery technology, especially high-power power battery technology, still restricts the development of new energy vehicles
BrianBlack: While there are significant differences between HEV and EV systems, the basic requirements for accurate energy measurement and reliable operation are common. Linear Technology manufactures integrated circuit products used in both applications.
Liu Peng: For HEVs, especially EVs, maximizing the use of stored electric energy is the key to increasing the driving distance of the vehicle. Therefore, active cell balancing technology is developing rapidly. The realization of battery matching is not to discharge the high-power battery to the lowest power, but to transfer the energy of the high-power battery to the low-power battery. This is achieved through Texas Instruments' patented powerpump technology, which uses a small inductor and transistor in a basic DC/DC converter setup to achieve approximately 85% efficiency. However, lithium-ion batteries also require close monitoring of overvoltage, undervoltage, and temperature levels to avoid possible fire or explosion. TI provides highly integrated battery monitoring and balancing solutions.
Yin Shusheng: Battery metering management is to collect statistics on the charge and discharge of the battery and provide the data to the vehicle management system; the charging management unit implements monitoring functions for charging and discharging of the battery pack, and detects the temperature of each battery unit in the battery pack. , voltage, current, self-discharge equilibrium voltage,
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