Battery Tips

With the state’s new energy policy to encourage bus step by step, many provinces and cities have mass transit as the use of new passenger cars energy. Recently, there were reports that beginning next year, the Pearl River Delta all the updates, or new buses should be using electric, oil and gas hybrid and other new energy vehicles.

However, with the use of new energy buses gradually expanded, some issues are beginning to emerge, how new energy to improve the adaptability buses, as many manufacturers increasingly important issue.

Climbing awkward hybrid

In Kunming, Yunnan, new energy out of the bus to some questions. Reflect a passenger, Kunming bus 26 is required in the uphill “breathe air a few minutes” to climb. “Start the bus stop frequently, for these cases, the manufacturer has not paid enough attention.” Industry source said. It is understood that the current domestic self-developed hybrid vehicles, although with a distinctive hybrid structure, but in performance, fuel rate, emission reduction and so there are quite different.

“Was the result of difficult climbing conditions, because the vehicle off the ramp repeatedly to make super capacitors used for energy recovery.” Energy products in a bus company official told the new “Commercial Vehicle News” reporter: “not only the super capacitor bus only a problem in Kunming, the operation in other places also have emerged during the uphill nature of the problem of insufficient power. such as the launch in Beijing in 2008 that approved a demonstration vehicle using the super capacitor has the same problem appeared in Hangzhou The same is true. ”

At present, the domestic part of new energy demonstration bus is still operational phase, not yet a mature product for the most tolerant people in the industry are holding the attitude. “The new improved bus energy can be said is imminent, inevitable. The new energy market of the time the bus is not long, the large-scale applications, the exposed problem can also be understood, although China has already started on the new energy vehicles 10 years of work, but its still a new thing, also need to continue to improve, improvement and optimization. “bus pass new energy project leader Wang JILIN ARCHITECTURAL AND CIVIL think.

Vehicles should pay attention to three areas to improve

As to how to improve the adaptability, Wang JILIN ARCHITECTURAL AND CIVIL three suggestions are given: “The first is to improve from a technical route, followed by the perfect product match the power system, and finally, market conditions for different areas to perfect the product. As manufacturing enterprises required conditions for the production of different users for different operating lines of hybrid buses. road conditions on bus lines and the full analysis of such factors as slope, based on the operation of vehicles equipped with a reasonable allocation of the number of battery and powertrain program data . ”

Wang JILIN ARCHITECTURAL AND CIVIL further explained, from a technical point of view of routes, long slope in the hilly areas or areas not suitable for selection as a super capacitor energy storage cell hybrid vehicles, the super capacitor energy storage capacity of their own limited, it is difficult to meet the long uphill or continuous start requirements. Kunming, the situation is insufficient and the battery capacity, in other places have such a situation, some bus companies in the use of hybrid vehicles, we often find that the battery charge is low. Therefore, it is suggested that public transport enterprises, designed to easily remove the battery, the replacement model.

“In fact, hybrid buses do not need to replace the battery. Users reason to change the battery, that is often encountered in a continuous uphill bus, starting the case, the vehicle uphill certainly need the battery power, when the battery runs out, power to and inadequate. This shows that the conditions for the long run uphill to consider increasing the battery capacity, such as the previously used 20 to 30 Ah battery, a long slope will increase to 40 to 60 Ah, take this method to meet the continuous uphill needs. “JILIN ARCHITECTURAL AND CIVIL introduced the king.

Wang JILIN ARCHITECTURAL AND CIVIL also gives other suggestions for improvement, for different use environment, such as high altitude in Kunming that, even from ordinary diesel engine thermal management must be improved. At high altitudes, the water temperature to 80 ℃ to boiling, the need to increase heat dissipation. In addition, from the battery, the motor thermal management to improve the adaptability and increase heat dissipation, such as the motor of the cooling fluid, cooling water pump flow rate should be increased accordingly, but also to standardize the design of cooling pipe way, if the cooling pipe Road not smooth, even if the coolant flow increased cooling effect can not be achieved.

Continuous improvement is the key

Industry sources, the North and South different climate, new energy bus to put forward different demands. Continuous high temperature subtropical south, the vehicle thermal management system is very demanding, to the engine, motor, batteries, electronic devices to improve thermal management. Northeast colder climate, you need the vehicle thermal management systems and improved battery life aspects. Winter to warm the battery, motor, too, only in the normal operating temperature range, can play a better role.

Compared with the traditional power of new energy vehicles matching the requirements of the transmission system more. Li Sheng, Secretary General of the Chinese professional gear, said it had, from Tianjin, Guangzhou, the actual operation of the new energy bus experience, motor driven by direct connection to the bridge to adjust the speed of the vehicle can not meet the requirements, the vehicle under different conditions speed and torque vary greatly, if not by twisting or ascending transmission speed reducer, motor operation will lead to excessive temperature rise of the motor and control system failure.

Therefore, a vehicle running into the bus business model, have experienced continuous improvement, sound stage. “We used including technical route, powertrain matching, manufacturing process and quality optimization methods, and continues to progress. Previously, we introduced the integration of motor and transmission technology to solve the needs of the vehicle uphill, Vehicle Integration degrees, the vehicle controls are improved, both to meet the needs of vehicle dynamics, but also meets the need for fuel economy. We have launched this year, eighth in the hybrid electric bus is able to meet the market need for high-volume products, vehicles After in Hainan, Hangzhou, Jinan, large-scale demonstration, also proposed a new improvement goals. “king JILIN ARCHITECTURAL AND CIVIL said.

During the World Expo in Shanghai, Sunwin also new energy vehicles adaptive improvements. The company official said: “We have a few cars on the same line to take a different match, the motor, engine power, speed optimization. Followed by the capture of braking energy recovery system, big noise and other problems.”