China North Vehicle Research Institute major projects of National 863 Electric Laptop Battery Vehicle Power Battery Testing Center is the main vehicle power battery testing and certification authority for the state means to the quality control, to guide the development of power battery testing base, but also at home and abroad to carry out the relevant communication window. At present, China's vehicle battery power in the development and production, what issues still exist? Their technical standards? To solve these problems, this newspaper reporter recently interviewed Prince, director of the Center for the winter.
"China Automobile News": At present, China's vehicle battery power certification and testing, how are we?
Prince of Winter: Since 2006, the state management of new energy vehicles announcement battery testing standards into effect, the electric vehicle battery power Acer Laptop Battery before the announcement must be mandatory testing. Initially, only a very small number of battery production through certification, is now about 30% of the production of the product has reached a certain standard. China North Vehicle Research Institute Power Battery Testing Center is the main vehicle power battery testing and certification authority, we promulgated by the state based on a car battery, the battery modules relevant standards and national 863 major projects power batteries and super capacitor testing norms and all kinds of single cells, modules, battery performance and safety tests and comprehensive testing.
Development of new energy vehicles TravelMate 290 battery power safety and cycle life put forward higher requirements, certification and testing battery as the battery business into the threshold of new energy industries, but this does not mean that by detecting the battery can be well applied to electrical car. Because electric vehicles are electric (EV), gasoline and electricity, and gas-electric hybrid (HEV, PHEV) and many other model, the battery performance requirements vary greatly, need to characteristics of the vehicle battery power to make a specific evaluation of matching.
Car power battery safety performance testing include acupuncture, overcharge, over-discharge, squeeze, drop, high temperature, short circuit test items, etc. 7. Adopted in a single cell basis, we would also like to test the security of the module will be composed of five cells in series battery module for testing. Due to cost constraints, at present there are very few companies test the safety of the battery pack. Test a battery pack costs 100 thousand to 50 million, while the whole group of electric bus vehicle power battery pack testing often requires the cost of several TravelMate 4000 million dollars, we now have the real power batteries used in electric vehicle safety data, and compared with test data there will be some deviations.
"China Automobile News": In the testing and certification process, you think how the safety performance of China's power batteries? What issues still exist?
Prince of Winter: From the security side, China's vehicle power battery overcharge, over-discharge problem is not serious, but more problematic is the short-circuit, acupuncture and squeeze. While the battery life for businesses to invest substantial funding research, but most production of the batteries in these three cases is difficult to secure compliance. Although acupuncture, short circuit, squeezing phenomenon is the limit state, but not underestimate the potential danger. In the event of roll-over accident, the implementation of rescue process, the power battery presence of these problems are often cause secondary damage.
This year, the state-led industrial development of new TravelMate 2300 energy, promote the electric vehicle technology advances, however, electric vehicles launched around the blind item relatively more. Vehicle power battery charge and discharge process is very complicated and complex motor cars and the environment, often encountered in wind, frost, rain, snow and other inclement weather, the battery's safety, consistency, stability, demanding. Battery enterprises not only need to have a strong R & D team, but also a large number of trial experience, in order to produce a motive power to meet the application requirements. At present, Chinese enterprises generally lack the experience of producing power batteries, manufacturing equipment, sensors, connectors, positive and negative material, divide not advanced enough, there will be a great risk of blind production.
"China Automobile News": the past two years, China's vehicle power battery production and sales, technical level and scale of development how?
Prince of Winter: from the use of point of view, China's Ni-MH battery than the lithium batteries better safety performance, but the lithium battery a higher energy density and cycle life. At present, the domestic lithium battery production enterprises more, especially lithium iron phosphate batteries faster than any other battery development. There are many Aspire 1680 dynamic models of electric vehicles, different models of battery, raised a different application requirements.
From the scale of production and marketing point of view, my car battery power are in the basic R & D, pilot phase, yet to achieve mass production, there is no large-scale used in electric vehicles, short term, power battery business is unlikely to achieve profitability.
"China Automobile News": with the international advanced level, the gap between China's power batteries is reflected in what areas?
Prince of Winter: First of all, foreign power batteries using automated production methods, while domestic mostly manual and semi-automatic mainly do not have mass production capabilities, precision level is not high. Degree from the commercialization of view, China has not the Aspire 1410 power battery can be commercialized, while the foreign sale of pre-existing motive power free. From the product structure, the foreign focus on the overall design and evaluation of battery, including battery pack heat, energy management, the standardization of connectors. In China, the focus of the battery companies still remain in the battery material. In addition, foreign power battery development parameters, standardization, serialization feature significantly, while the size of domestic products, the series varied, heterogeneous disorder.
Second, China's relatively backward power battery production equipment, many companies will focus on the material, ignoring the manufacturing equipment improvements. At present, China mainly depend on production of batteries and equipment imports expensive, which is our vehicle development is very unfavorable power batteries, TravelMate 4500 power batteries in mass production, it should be of advanced automation equipment, research top priority.
Third, most of the enterprises of China's independent power battery research and development, its funding is limited, can only solve the basic problems power battery technology is difficult to further advance. The lack of adequate communication between enterprises, all want to know the circumstances of other people do not want to talk about their own experiences, there is widespread low-level study of the phenomenon of repetition. We should learn from Japan, to build momentum in LCBTP03003 battery technology alliance to promote common technology development, to spend money on knife's edge.
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