What’s the prospects of electric vehicles with nickel metal hydride batteries?

Nickel metal hydride battery was developed in 1990s, is a kind of novel green battery, has the characteristics of high energy, long life and no pollution. Thus, it become one of high-tech products developed all over the world against each other. Compared to lead-acid battery, nickel metal hydride batteries increase energy volume density three times than lead-acid battery, it also increases in specific power 10 times more.

2010 Automotive News (car) quoted a Toyota executives as saying, Toyota is still in the next 10 years will insist to use the old metal battery, 12 years of mass production have proved the effectiveness and safety of NI-MH batteries, although NI-MH batteries will be in the future Lithium ion batteries To replace, but lithium ion battery is more suitable for plug-in and all-electric cars, and hybrid cars where need quick charge battery performance, at this point still obvious advantages of NI-MH batteries.

The nickel metal hydride batteries used in electric cars, mainly in Japan, the United States, Germany and France.

Japan mainly engaged in the development of the electric car with nickel metal hydride batteries for typical manufacturer Panasonic battery the company. Panasonic has successfully developed type of pure electric vehicles with high energy battery pack, and the battery cost to around $500 / (kw · h). Toyota Prius, "Lexus LS600h hybrid car adopts" nickel metal hydride rechargeable batteries.

Toyota FCHV - adv for fuel cell hybrid electric vehicle, car is equipped with a fuel cell and nickel metal hydride battery, nickel metal hydride batteries for the motor of the starting and fuel cell, a full of travel distance of hydrogen is about 830 km.

Ovonic companies in the United States in the United States advanced battery development consortium (UAABC) funding to carry out the development of electric vehicles use MH - Ni battery, development level reached the USABC formulate mid-term development goals.

Production of hybrid cars use NI-MH Ovonic companies in the United States power battery Many car manufacturers in the world has been widely used, such as Toyota Prius, Camry and Honda Civic, Insight, ford Fusion, the Escape, Lexus RX400h and Porsche Cayenne, etc.

Ovonic company in March 2011 to develop vehicle NI-MH battery technology development blueprint, put forward the "Halfthesize, Halfthecost" (volume in half, cost halved) slogan.NI-MH batteries in the future research focus on three aspects: the improvement of hydrogen storage alloys; Stability of high capacity anode material, the preparation of Ni (OH) 2 with O2 control; The redistribution of the electrolyte.

Varta Germany company development of high-power density has reached 1000 w/kg, but the specific energy is only 40 wh/kg. The battery is also very good to adapt to the needs of the 42 v automobile electrical system, it is not only the power of discharge is high, pulse charging power is 1100 w/kg (monomer battery level), and in low temperature - 25 ° C when pulse charging power can reach 500 w/kg.

4/5 of the French Saft sf type 41 mm x 93 mm (30) high power NI-MH battery capacity for 14 a x h, specific energy of 47 w. h/kg, 80% charge state corresponding to the power of 900 w/kg, power density of 2500 w/L.

In the field of MI-MH batteries, which has advantages in technology and resources in our country, our country leads the world in the performance of nickel hydroxide, abundant rare earth resources, has a unique advantage. At present, in the field of domestic NI-MH batteries, chunlan group and corun become major rivals. Apart from the above two, Baotou rare earth, in the torch high and new, and Tianjin blue sky hi-tech is also in the production of nickel metal hydride batteries, and Xiamen tungsten, jean nickel industry is NI-MH battery supplier.

2007 chunlan power battery manufacturing company through hundreds of times experiments of the battery production, mastered the battery the latest packaging technology, the performance indexes meet the international standards, thus for high power NI-MH batteries lightweight, standardized, systematic, modular and provides high reliability, manageability, economy of the whole solution. Chunlan, first of all, to solve the high-power NI-MH batteries, high energy density and quality than the largest energy has amounted to 84.5 w. h/gaiter discharge performance is strong, its monomer 1.2 V16A h. under normal temperature with different ratio of discharge and discharge platform stability, discharge platform under 12 c ratio above 1 v, 3 c discharge capacity can reach more than 90% of the rated capacity. Long cycle life, according to the national standard GB/T18332.2-2001 monomer battery 80% DOD cycle life test, cycle was more than 1300 times. Don’t need to be maintained in the course of using, also do not have any material emission, even if a short circuit, falls, the phenomenon such as heating, vibration will not explode, burning. Because packaging technology is very advanced, thus, chunlan high power NI-MH batteries than other same type battery light quality, small volume, large power and high energy, after combination, modular and system integration effect is good, power management, reliability, economy is significant.

At present, the research and development of chunlan 42 v large capacity and more than 500 a large current high-power NI-MH battery pack and management system, have been used Changchun, Wuhan, Wuxi, Tianjin, Liaocheng, Zhuzhou city, Shanghai hybrid bus, has been successfully carried out demonstration run, and comprehensively by the national development and reform commission (NDRC) power battery electric vehicle management mandatory testing standards. Configured with chunlan high power NI-MH batteries of electric cars, has a large number of exports to France, Italy, Germany is more energy saving and environmental protection requirements is quite strict EU countries.

Hunan Shenzhou technology co., LTD. Is a professional engaged in high power and large power NI-MH power battery research, development, production and sales of high-tech enterprises. The company developed high power 40 a. h NI-MH battery of continuous charging current can reach 4 c, continuous discharge current can be up to 8 C. In - 20 ~ 45 ° C temperature range can adapt to high current charge and discharge work continuously; Monomer battery 1 c charge 80% SOC, 2 c, 100% DOD discharge cycle life over 3100 times, and in the life period, capacity is higher than 40 a. h cycles of 2700 times, a single set of batteries loading operation has accumulated more than 100000 km. Its 8A. h NI-MH batteries and cars form a complete set, specific energy of 45 w. h/kg, than the power of 800 w/kg, battery cycle life of more than 400 times.

Jiangsu power battery co., LTD. (Sino Australian joint venture) used at home and abroad the most advanced equipment and first-class technology of green environmental protection, using high quality raw materials at home and abroad, specializing in the production of nickel metal hydride type high power battery, strict production process quality management method for quality control. Product quality is stable and reliable, circulation service life is long, the power performance is outstanding, high and low temperature high charge-discharge efficiency, can be widely used in hybrid electric vehicles, electric bicycle, scooter riders, golf carts, the old man walking vehicles and electric tools, etc. To project nickel metal hydride batteries which power the main production of hybrid power supply system, is also a key state encourages the development of new energy industry project.

Although NI-MH batteries made great breakthroughs in technology, but there are still many factors restricting its practical applications, including high temperature performance, storage performance, cycle life, battery management system, thermal management and price etc.

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