With the rise of electric vehicles, their quality issues have become the focus of the whole society. After several years of development, especially the application of new technologies, the overall quality level of electric bicycles has greatly developed, and the quality awareness of production enterprises has also been improved to a certain extent. However, a considerable number of companies do not pay attention to quality issues in some details. Let's take a look with the High Power Electric Motorcycle manufacturer.

1. Electric vehicle battery and controller:
The problem of the battery is mainly concentrated on the false standard of capacity. Perhaps this is a tacit agreement between the vehicle company and the battery company. It is nothing more than exaggeration and misleading consumption. For example: 10Ah (2hr) battery for electric bicycle is marked as 12Ah (10hr) or 14Ah (20hr). The problem of the controller is reflected in the unreasonable design of the undervoltage and overcurrent protection value, or that the actual value deviates seriously from the design value. For example: 36V lead-acid batteries, the undervoltage value in the industry is usually designed at 31.5V, but the undervoltage value of individual companies is 26-27V, the original intention is to increase the continuation mileage, but this causes deep discharge of the battery and greatly shorten Shortened battery life. In order to improve the speed and climbing ability of electric bicycles, some companies have designed the controller with a large current limit value, so that the battery is often in a large current discharge state, shortening the battery life, and making the motor. If the temperature rise is too large, the motor will generate heat for a long time to cause demagnetization of the magnetic steel, reducing the working efficiency of the motor, and ultimately leading to premature failure of the motor.

2. Handlebar and saddle:
The quality items related to the handlebars and saddles in the standard are the torque of the stem and the fork riser, the torque of the stem, the static load of the stem, the torque of the cross pipe and the stem, and the safety of the stem There are seven items including the line, saddle adjustment clamping strength, and saddle tube safety line, of which five items are important items, and two are general items. In some new models, especially some simple cars with small wheel diameters, the stem is designed to be relatively long, but the strength of the stem is not strengthened accordingly, resulting in a failure in the static load test of the stem. For some simple models, the saddle adjustment and clamping strength are not qualified. The reason is that on the one hand, the material of the saddle clamp and the seat clamp is soft and the meshing is not in place, so it cannot withstand the vertical force and rotate. On the other hand The reason is that the design of the joint between the saddle tube and the frame riser is unreasonable, the size is not well matched, or the fasteners are not properly selected. This causes the saddle tube to rotate relative to the frame riser when the specified horizontal force value is not reached. The standard stipulates that both the riser tube and the saddle tube should be marked with a safety line. This is the simplest problem, but there will still be occasions when the safety line mark is missed during the inspection.

3. Paint plating parts:
Because most of the car body is covered by plastic parts and there are few exposed iron parts, some companies do not pay attention to the quality of electroplated paint parts. The iron structural parts have paint leakage and paint leakage. Simple vehicles have more exposed iron parts. For the sake of beauty, most of the exposed iron parts are electroplated parts. Many companies do not have the means to control the quality of electroplated parts. Soon after the bicycle was used, the car body was corroded. In fact, details often determine success or failure, and good appearance is also one of the measures to improve the quality of electric bicycles. Therefore, manufacturers must pay attention to both the internal quality of products and the appearance quality of products.

4. Instruction manual:
In the inspection, it was found that the specification items were unqualified, and most enterprises did not prepare the instruction manuals according to the standards. In fact, the instruction manual is the easiest item to be qualified. Just print the content that should be stated on the instruction manual according to the standard requirements. According to national standards, enterprises should indicate the following three requirements in their instructions: 1. Safe use recommendations and warnings; 2. Correct use of main components; 3. Main technical parameters and performance indicators. In the above three aspects, except that the main technical parameters and performance indicators vary with different models, the remaining two are mostly the same and can be printed in the general manual, while the main technical parameters, performance indicators and special requirements can be printed separately , To form a special manual for a certain car model, or attached to the manual by means of inserts or single pages.

The above content is shared by TAIZHOU SUQIER NEW ENERGY SCIENCE AND TECHNOLOGY CO.,LTD. in the hope of helping those in need.