National standard low-speed electric vehicle: lead-acid battery may be rejected
is it lead-acid or lithium battery? The limitation of battery types has become the most controversial issue in the field of low-speed electric vehicles. According to relevant sources, at the recently held "the second meeting of the working group on the standard of temperature control indicators that four-wheel low-speed electric vehicles can fully meet the rules of the national standard gb/t229 (2) 007", the enterprise side strongly demanded that low-speed battery vehicles be allowed to use lead-acid batteries, while industry experts who expressed objections persuaded "let's die"
3. Systematic error of universal testing machine: keep the error of 1 constant value or 1 constant change
"lead acid battery don't hold too much hope"
from the situation of this discussion, although low-speed electric vehicles have small and low-speed characteristics, they still have the attribute of carrying passengers. Therefore, the preparation of the draft standard takes "safety is not reduced" as the principle, that is, compared with traditional passenger cars, they will not be widely used in household appliances, automobiles Many fields, such as the shell of electric opening tools, reduce the requirements in terms of safety, but put forward requirements in terms of power, size, weight and so on according to its special properties. It is understood that the draft temporarily rejects lead-acid batteries. Every part has its value. It is also based on this principle, taking into account not only the safety of traffic roads, but also the safety of social environment
as early as mid April, the National Standards Commission announced the national standard project of "technical conditions for four wheel low-speed electric passenger vehicles", one of its purposes is to solve the pollution caused by the lead-acid batteries carried by large-scale low-speed electric vehicles in the process of recycling and smelting, so as to transform to a more environmentally friendly lithium battery. For a time, the limitation of battery types has become the most controversial point in the field of low-speed electric vehicles. Among them, many industry experts called for replacing lead-acid batteries with lithium batteries as the power source of low-speed electric vehicles, but this also caused an uproar among the enterprise representatives participating in this discussion
at present, more than 90% of the low-speed electric vehicle companies in the market use lead-acid batteries, but few models are equipped with lithium batteries. Once the standard is implemented and lithium batteries are required, it is bound to have an impact on many enterprises in the industry. Not only is the product cost difficult to control, but even the whole model needs to be redesigned and developed. "Low cost, in line with the consumption level of third and fourth tier cities and villages." In the view of many low-speed electric vehicle manufacturers, in order to meet the market demand, the status of lead-acid batteries in the field of low-speed electric vehicles should not be banned. On the other hand, they also believe that the development of lead-acid batteries has been quite mature, and their recycling system has reached a high level
previously, Yang Yusheng, an academician of the Chinese Academy of engineering, also stressed at the 2016 Mini Electric Vehicle Industry Summit Forum and annual ceremony that the standard for four-wheel low-speed electric vehicles should not limit the variety of batteries. All kinds of battery materials have certain advantages and disadvantages, and all kinds of batteries should be allowed to develop together in an environment of fair competition. Blindly limiting the variety of batteries will not be conducive to the development of new battery materials, It should be selected by the enterprise and judged by the market
however, some experts believe that lithium batteries have larger mileage, longer service life, higher battery capacity, and more environmentally friendly recycling process, which are more suitable for the long-term development of low-speed electric vehicles. "And the cost is also declining." Although the draft standard remains to be discussed, some experts present said, "don't hold too much hope for lead-acid batteries." At the same time, some participants proposed to give a certain market transition period
a number of standards have become a consensus
in addition, the above-mentioned person also revealed that although there are still variables in the technical standards for the final landing, from the situation of this discussion, some ideas have also formed a consensus. For example, low-speed electric vehicles should be designed to have 4 seats or less, the maximum speed should be set between 40-70km/h, the driving range under comprehensive conditions should be greater than 60km, and the starting acceleration from 0 to 40km/h should not exceed 10s Three point safety belt must be equipped. In addition, the requirements for reliability and safety are also in accordance with the standards of traditional passenger cars, and the test conditions such as speed and mileage are reduced according to the characteristics of low speed and small size
however, there are also problems in details such as curb weight, body size, collision standard and so on, which have not been reached at this discussion meeting. Whether the curb weight should include batteries, or limit the mass ratio of bare cars to batteries, whether the vehicle width should be within 1500mm, and whether the collision test should be required according to the standard of traditional passenger cars still need further discussion
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