Electric bicycles can't over charge

Unqualified braking performance will affect the safety of the e-bike; Overcharging of e-bikes is a safety hazard... The "weekly quality lecture hall" jointly sponsored by yangzi evening news and jiangsu provincial quality supervision bureau, this period invited ye zhentao, senior engineer of national light electric vehicle and battery product quality inspection center, who will make a detailed introduction to the purchase and safe use of electric bicycles for consumers.

Yangzi evening news reporter Xue Ling

Top speed is critical index, etc

Convenient electric bicycle nowadays many workers out become the preferred means of transportation, but at the same time, the electric bicycle safety problem also nots allow to ignore. Ye Zhentao said that at present our country electric bicycle products was established in 1999 version of standards, according to the regulation of this version, top speed, braking performance, frame/fork assembly vibration intensity become determine whether the electric bicycle qualified key indicators.

From the province pledges inspect bureau was announced after electric bicycle quality selective examination results, 80.6% of the overall sampling percent of pass are showing electric bikes still exist more problems, the reasons of unqualified mainly concentrated in top speed, the fork frame/assembly vibration intensity, reflector.

Reflector is the most easily overlooked

In electric bicycle 34 testing project, top speed, attracts the most attention as well as making other electric bicycle speeding traffic participants, also leave hidden trouble to the traffic safety. Compared to top speed, the consumer for the frame/fork vibration intensity of this composite index is strange, many Ye Zhentao said that this project is simple said is assess the strength of the frame/front fork, if the project is unqualified, it may cause the rider in the normal cycling in personal injury incidents due to assembly fracture. According to the national standard, the fork frame/assembly after 70000 times of vibration test, each part of the frame can’t have damaged, obvious deformation or loose.

In the province pledges inspect bureau sampling inspection, unqualified batch of most projects for reflector device offerings, there are 132 batch products reflector optical performance is lower than the level 3. It is understood that the terms and conditions of the set is given under the condition of electric bicycle driving at night, easy to be identified, to avoid traffic accidents, and partial models optical performance is poor, just a decoration, moreover is not installed in the design of side and rear reflector.

Over-charging objectionable

Many consumer know, mobile phones can't over charge, actually electric bicycle. Ye Zhentao said, many people used to in the evening to electric bicycle batteries, to remove the plug before going out in the morning, think it can keep enough power, little imagine, over charge will cause damage to the battery, will even cause safety accidents. Ye Zhentao warns customer, electric bike can't over charge, if it is charging at night, can choose which has the function of automatic power charger, to ensure that the battery to keep good performance.

Don't forget routine check

Electric bicycle ride was dispersed, in such cases in real life much happened. Electric bicycle apart, in addition to the part quality reasons, there are also some related to consumer maintenance does not reach the designated position. Ye Zhentao warns customer, every sunrise before, consumer had better check the screw fastening situation; Within a year, check whether a circuit is good. If the battery for electric bicycle "inadequate", had better ask professional personnel to check the battery or line is abnormal, and timely repair or replacement.

The new standard is loose and strict

Since last year, have heard that the new national standard of electric bicycle be forthcoming." New gb" one of the most concern, should calculate the speed and weight of the electric bicycle. In the previous old gb, electric bicycle top speed of 20 km/h, no more than 40 kg weight, and in the "new gb" (draft), the electric bicycle cap speed is changed to 26 km/h, empty weight in 55 kg (including battery).

Written to the standard of "speed" can make electric bicycle more unsafe? Ye Zhentao, said the new standard seems to be the electric bicycle an hour from 20 km/h up to 26 km/h, but the fact is now a lot of traffic on the road electric bicycle speed of 30 km/h, even higher than the new criteria relax the speed of electric bicycles, as the new standard for electric bicycle to limit the speed, and speed cannot be tampered with. In addition, from the point of the current study results, electric bicycle safety car weight and no connection, 55 kg car is determined after investigation and statistical analysis, in addition to the speed and vehicle weight, the new standards also adopted a series of security measures, such as braking distance, frame strength, requirements are improved.

The page contains the contents of the machine translation.