Electric balance car, also known as somatosensory car, thinking car, camera car, etc., is a new type of green environmental protection product used by modern people as a means of transportation and leisure and entertainment. There are two main types in the market: one-wheeled and double-wheeled. Its principle of operation is mainly based on a fundamental principle known as "dynamic stability". The gyroscope and acceleration sensor inside the car body are used to detect the change of the car body attitude, and the servo control system is used to accurately drive the motor to make corresponding adjustments to maintain the balance of the system. Two-wheeled electric balance bike is a new type of transportation, which is different from the front and rear arrangement of the wheels of electric bicycles and motorcycles, but adopts the way that the two wheels are fixed side by side. The two-wheeled electric balance car adopts two wheel support, battery power supply, brushless motor drive, plus single-chip microcomputer control, attitude sensor collects angular velocity and angle signal, coordinates and controls the balance of the car body, and can realize the start, acceleration, deceleration, stop and other actions of the vehicle only by relying on the change of the center of gravity of the human body.
At present, this kind of products are more popular with young people, many countries have formulated corresponding safety regulations for the import of electric balance vehicles, especially the United States is very strict about the safety regulations of live products, the United States Consumer Product Safety Association (CPSC) announced that all balance vehicles (including twisting cars) manufacturers, importers, dealers, their production, import, sales of balance vehicles in the United States must meet the latest safety standards, including UL2272 balance car circuit system certification standards. In addition, all balance bike batteries must comply with UN383. Certification requirements. Therefore, if the seller wants to use the Amazon platform or TEMU platform and some other cross-border platforms, it will need to provide a UL2272 test report to prove that the product meets the safety requirements of the United States for electric self-balancing scooters and protect the safety of consumers. Before submitting a UL standard test report, Amazon must order the merchant to stop selling. And the test report must be a conformity report issued by a laboratory accredited by the ISO 17025 ILAC ISO 17025 standard.
The test items involved in the UL2272 test report of the electric self-balancing scooter are:
Overcharge, short circuit, overdischarge, temperature test, unbalanced charge, withstand voltage test, insulation obstruction test, vibration resistance test, impact, extrusion, drop, molded shell stress, motor overload test, motor locked-rotor test, wire buckle stress test, water exposure test, temperature cycle, label durability, etc.
The information that needs to be prepared for the UL2272 test report of the electric balance vehicle is as follows:
1.UL application form.
2.Product specifications, product information.
3.Manufacturer Information.
4.Product or product.
5.Other required information can be communicated to the laboratory.
The process is roughly as follows:
1. Choose ISO17025 laboratory cooperation, the applicant submits an application, and fills in the application form.
2. The applicant provides product information, and provides instructions and technical documents.
3. The laboratory determines the test standards and test items and charges the testing fee.
4. The applicant confirms the ** and submits the samples and relevant technical documents.
5. Issue a notice of charging to the applicant, and the applicant shall pay the testing and certification fee according to the requirements of the notice of charge.
6. The applicant sends the sample, and the laboratory arranges the product for testing.
7. If the test is unqualified, the applicant will be notified and the applicant will be allowed to improve the product.
And so on until the test is passed. The applicant should make changes to the technical information in the original application so as to reflect the actual situation after the change.
8. If the test is qualified, the laboratory will provide the UL test report to the applicant.
The processing cycle is generally 5-7 working days, and the product can be made into series, depending on the actual situation of the product.