On July 20, Hainan Provincial Market Supervision Administration released "Hainan province 2024 electric bicycle vehicle and its rechargeable battery quality announcement on the results of special supervision and spot check, there are 20 pieces of unqualified product information. The unqualified items are mainly signs and warnings, main circuit protection in charging state, mutual recognition and cooperative charging, vehicle quality, etc. The nominal production enterprises of unqualified products involve 5 provinces and cities including Guangdong, Tianjin, Jiangsu, Hebei and Shandong.

If the protection of the main circuit in the charging state is unqualified, it means that the charging circuit and the main circuit are not set separately for the electric bicycle, resulting in dangerous voltage in the main circuit during charging and the risk of electric shock for personnel.

Mutual recognition collaborative charging does not meet the requirements of the standard are all electric bicycles equipped with lead-acid batteries, because the vehicle charger and the body charging circuit have no communication function, mutual recognition identification cannot be carried out, therefore, the misuse and mixing of the charger cannot be avoided. Once the high voltage and high current charger is used incorrectly, the battery system may be overcharged and there is a risk of fire.

The original text is as follows:

hainan province 2024 electric bicycle vehicle

announcement on the results of special supervision and spot check on the quality of rechargeable batteries

according to the "Product Quality Law of the People's Republic of China", "interim measures for the management of product quality supervision sample testing" and other laws and regulations, as well as the requirements of the notice of the general office of the general administration of market supervision on carrying out special supervision and spot checks on the quality of electric bicycles and their rechargeable batteries and the plan of product quality supervision sample testing in hainan province, the provincial market supervision bureau adheres to the problem orientation, the inspection items with high unqualified rate in recent years and the latest "electrical safety requirements for electric bicycles" officially implemented in 2024 will be included in the inspection.Check the detailed rules, focus on the business sites and brands that are prone to problems, especially the inventory vehicles produced before the implementation of the above new standards, organized special supervision and spot checks in the circulation field from April to May, 2024. This spot check covers 18 cities and counties in the province. A total of 20 batches of products are found to be of quality that does not meet the relevant standards. All of them are electric bicycle products. The unqualified items are mainly signs and warnings, primary circuit protection in charging state, mutual recognition and cooperative charging, vehicle quality, etc. The nominal production enterprises of unqualified products involve 5 provinces and cities including Guangdong, Tianjin, Jiangsu, Hebei and Shandong.

As for unqualified products found in this supervision and spot check, Hainan provincial market supervision administration has instructed the market supervision and management department in the jurisdiction to do post-processing work in accordance with the Product Quality Law of the People's Republic of China, interim measures for product quality supervision sample testing management and other provisions, including but not limited to the following measures: first, notify the seller to stop selling the same product to prevent the problem products from entering the market; Second, notify the market supervision department where the production enterprise is located to strengthen the source governance; the third is to supervise and guide producers to find out the causes of unqualified products and complete the rectification within a time limit; The fourth is to investigate and deal with suspected violations of laws and regulations according to laws and regulations.

Product knowledge popularization and consumption tips

i. Electric bicycle

electric bicycle is a two-wheeled bicycle with on-board battery as auxiliary energy, pedal riding ability, and can realize the functions of electric assist and/or electric drive. Electric bicycles are classified according to battery: Lead-acid battery electric bicycle and lithium battery electric bicycle. According to the classification of driving mode: electric-assisted electric bicycle and electric-driven electric bicycle.

1. Purchase suggestions: choose regular physical stores or e-commerce products with good reputation and complete licenses; Choose products with CCC mandatory certifications; Choose products with consistent product certificates and vehicle information; select products with three guarantees after-sales service.

2. Suggestions for use: Do not privately modification upgrade the battery, do not use mismatched charger; Avoid charging the electric bicycle in the case of sun exposure and high temperature in summer, resulting in the high temperature heat out of control of the battery; avoid charging the electric bicycle for a long time, especially the battery overcharging caused by charging all night. Check electricity regularlyMove bicycles and batteries, and go to regular after-sales service outlets for maintenance in time when abnormal situations are found, so as not to bring security risks to themselves and others.

II. Electric bicycle rechargeable battery

(1) lead-acid battery for electric bicycle

lead-acid battery is a kind of secondary battery that can be repeatedly charged and discharged by converting chemical energy into electrical energy. It is currently the most widely used type of battery. Widely used in motor vehicles, mainly responsible for starting, driving, lighting and power supply of vehicle electrical appliances. Currently, there are two types of lead-acid batteries commonly used: one is dry charge type. When this type of battery is enabled, electrolyte is injected on site, commonly known as "water battery"; The other is Valve-controlled battery, it is not necessary to inject electrolyte when it is enabled.

1. Purchase suggestion: Check whether the appearance of the battery has deformation, crack, scratch and leakage marks; Whether the battery is produced in the near future; Whether the capacity is clearly marked (the larger the marked rated capacity, the longer the battery discharge time, however, the battery capacity should be reasonably matched with the required capacity of the vehicle, not too large).

2. Suggestions for use: the initial charge should be sufficient, and the replenishment water should be timely; Control the discharge depth, and do not overdischarge with the charge; Replenish the electricity in time to avoid overcharging; Maintain a good insulation state; pay attention to heat preservation at night in winter; Avoid overload and overload using the battery, so as to avoid long-time high current discharge, damage the battery, shorten the battery life; Regularly follow the product instructions for maintenance, during daily use, the battery should be replenished in time to make it in the state of shallow charge and shallow discharge. When it is not used for a long time, it should be replenished regularly to prevent the battery from being damaged due to excessive power loss; avoid storage in harsh environments such as supercooling and overheating; The battery temperature is maintained at 15℃ ~ 35℃, which is an ideal use state; Keep the battery surface dry and clean, etc.

(Ii) lithium-ion battery for electric bicycle

lithium Ion battery refers to the secondary battery with Li + embedded compound as positive and negative electrode. Lithium ion battery has the advantages of small volume, large capacity, light weight, long service life, fast charging, etc.Rapid expansion. However, because lithium can spontaneous combustion in the air and electrolyte is organic, the safety of lithium battery is worse than that of lead-acid battery. With the progress of production technology, the safety of lithium iron phosphate power batteries currently produced has been further improved.

Purchase suggestion: see the logo. Check whether the battery logo is complete, including the factory name, specification and model, and whether the manufacturing date is in the near future. Look at the appearance. Check whether the appearance of the battery has deformation, cracks, scratches and leakage marks; See the capacity. Whether the capacity is clearly marked.

Attachment: 1. Unqualified product information

2. Description of unqualified items

attachment 1

unqualified product information