Electric bicycles have become the main means of transportation for many neighborhood friends, but some people in order to increase the mileage of electric bicycles, improve the speed of driving and illegal addition (modification) of over-standard batteries, the vast majority of such over-standard batteries are assembled by defective and waste cells, lack of necessary protective accessories, and are very easy to cause fire accidents.
recently
It was drafted by the Ministry of Industry and Information Technology
Safety Technical Specifications for Lithium-ion Batteries for Electric Bicycles
Mandatory national standards
It has been issued by the State Administration for Market Regulation (National Standards Committee).
It will be officially implemented on November 1, 2024
Let's take a look at the relevant content↓↓
Implementation of this national standard
will curb the proliferation of inferior battery products
Combating illegal production and marketing
plays an important role
👇👇👇
The "Technical Specification" stipulates the safety requirements and test methods for lithium batteries for electric bicycles applicable to the "Safety Technical Specifications for Electric Bicycles" (GB 17761) from the two levels of single batteries and battery packs.
Among them, the single battery mainly considers six safety requirements: overcharge, overdischarge, external short circuit, thermal abuse, acupuncture, and marking. It is understood that the "Technical Specifications" for the single battery stipulates strict overcharge (1.5 times), acupuncture and other tests, high nickel system ternary lithium battery is difficult to pass the above tests, will be difficult to apply in the field of electric bicycles in the future.
The battery pack mainly considers 22 safety requirements in 7 aspects: electrical safety, mechanical safety, environmental safety, thermal diffusion, mutual recognition and collaborative charging, data collection, and marking.
thereinto
Here are a few test items
Need to focus on ↓↓
1. The overcharge (1.5 times) test and acupuncture test of the single battery can effectively screen the safety of the battery.
2. The battery pack should have a unique code, and the code identification needs to be made of high-temperature resistant (950 °C) material, which can be traced even in the event of a fire.
3. The overcharge, external short circuit, and overcurrent discharge tests of the battery pack should be carried out under normal working conditions and under the condition of single fault of the protection components, so the battery pack may need to adopt a double protection design to meet the requirements.
4. The battery pack needs to have a mutual recognition and collaborative charging function to reduce the risk of charging the battery pack caused by the mismatch of the charging device.
5. The battery pack should collect the battery voltage, battery pack voltage/temperature/current in real time during the charging and discharging process, which requires the battery pack to be equipped with a management system (intelligent "brain") for real-time monitoring.
6. The manufacturer should clearly mark the "safe service life" on the battery pack to remind users to eliminate the old battery in time, because with the increase of the service life of lithium-ion batteries, its safety risks will gradually increase.
7. Flame retardant materials should be used for the shell, printed circuit board and wire of the battery pack to reduce the spread rate of flames after a fire.
8. The thermal diffusion test of the battery pack requires that when a single battery in the battery pack catches fire, it shall not quickly spread to the entire battery pack.
furthermore
In order to strengthen the management of the electric bicycle industry
Promote the standardized development of electric bicycle enterprises
Improve the quality and safety level of electric bicycle products
The Ministry of Industry and Information Technology, in conjunction with the State Administration for Market Regulation
The National Fire and Rescue Administration officially issued it on April 30
"Standard Conditions for the Electric Bicycle Industry"
Measures for the Administration of Standardized Announcements in the Electric Bicycle Industry
At present, Chancheng public security is carrying out a special rectification action for electric bicycles, in the chaotic road section where electric bicycles are concentrated, carry out normalized and multi-police road renovation every day, and strictly investigate all kinds of traffic violations, including focusing on the investigation and punishment of illegal modification of electric bicycles, running red lights, driving in the wrong direction, not driving on non-motorized lanes, driving electric bicycles without wearing safety helmets and other traffic violations.
Greetings to the neighbors
Cherish life
Civilized and safe travel
Zumiao Micro News Editorial Group
Source: Gongxin Weibao, China Emergency Management, Zumiao Street Road Security Office, Emergency Office
Editor: Foshan News Network Yang Xiaoting
Review: He Jinting, Yang Rongyan, Wang Minghui
(Swipe to see more)
Foshan Ancient Town · Zumiao Street