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With the popularization of new energy concepts, new energy vehicles have gradually entered thousands of households. As a new car choice for ordinary people, new energy vehicles have begun to invade the market that originally belonged to traditional fuel vehicles, as the largest new energy vehicle. In the market, Chinese enterprises rely on new energy vehicles to stand on the same starting line with foreign companies for the first time, and new technologies and processes that are constantly emerging have enabled China's new energy auto industry to have more sufficient enthusiasm to look to the world and focus on the future.
The core of the traditional fuel vehicle is naturally inseparable from the so-called "three big pieces": the engine, the chassis and the gearbox. In this "three big pieces", the Chinese automobile manufacturers behind the German technology are behind the German and Japanese companies. consensus. In the new energy electric vehicles, there are also commonly known as “three big piecesâ€: batteries, motors and electronic controls. Since new energy electric vehicles are still relatively new in the world, the start-ups of enterprises in various countries are not much different. Let Chinese enterprises have the same conditions as foreign companies in the multi-purpose power driving tools that the automobile was invented in 1886. This article focuses on the electronic control in the "three major pieces" of new energy electric vehicles (commonly known as battery management system BMS).
The biggest difference between new energy electric vehicles and traditional fuel vehicles is that they use power batteries as the power drive. As an important link between battery packs, vehicle systems and motors, the importance of battery management system BMS is self-evident. Many new ones at home and abroad. Energy car companies regard the battery management system as the core technology of the enterprise. The most famous example is Tesla, which is well known to all. Tesla's electric vehicle "three big pieces", the battery comes from Panasonic, the motor comes from Taiwanese suppliers, and only the battery management system is the core technology independently developed by Tesla. The core intellectual property rights applied by Tesla during 2008-2015 are mostly related to the battery management system. This shows that the battery management system is new energy. The importance of the car. Domestically, the R&D and production of battery management system BMS is mainly concentrated in these three types of enterprises:
1. New energy vehicle manufacturer, representative enterprise: BYD
2, battery PACK manufacturers, on behalf of the company: Waterma, Pride
3, professional BMS manufacturers, on behalf of enterprises: Huizhou billion, Shenzhen Guoxin Power
What is the role of the battery management system BMS?
The battery management system BMS is a new product born in this century. Because the electrochemical reaction is difficult to control and the performance change of the material in this process is elusive, it is necessary for such a housekeeper to supervise and adjust the behavior of limiting the battery pack. Safe to use, its main functions are:
1. Accurately estimate the state of charge of the power battery pack
Accurately estimate the state of charge (SOC) of the power battery pack, that is, the remaining battery power, to ensure that the SOC is maintained within a reasonable range, to prevent damage to the battery due to overcharge or overdischarge, thereby predicting the hybrid power at any time. How much energy is left in the car's energy storage battery or the state of charge of the energy storage battery.
Take a deep breath, close your eyes, the world has the freshest oxygen ... Yu Quan's "Deep Breath" is well known to us, but as the environmental problems become more and more serious, the haze sky also increases, PM2.5 PM10 and so on Vocabulary has also been mentioned more and more, and air purifiers have quickly become popular on the market with this "air quality" trend. Along with this, the air-clean brand has sprung up, and various technologies are dazzling. Which ones are indeed effective and which are just tasteless propaganda? How does the Air Purifier bother us to get rid of pollution? And look at the editors for you.
Analysis of air purifier
The critical value of PM2.5 content is 75 μg / m3
The pollutants in the air mainly include soot, total suspended particulates, inhalable particulates (PM2.5) and fine particulates (PM10). The smaller the diameter of the particulates, the deeper the part that can enter the respiratory tract. 10 micron diameter particles It is deposited in the upper respiratory tract, and particles below 2 microns can penetrate 100% into the bronchiole and alveoli.
1k-5k air purifier prices vary greatly
The air purifier products on the market not only have various functions, but also have prices ranging from thousand yuan to tens of thousands. The pricing of imported products is generally higher than that of domestic brands. Except for the core technology of many brands, the promotion of purification effects is similar, and consumers need to choose according to demand.
The air quality standard of 74 key cities is only 4.1%
According to the data of the press conference held by the State Council Information Office on June 4, according to the new "Ambient Air Quality Standards", the six pollutants SO2, NO2, PM10, PM2.5, CO and O3 were evaluated, 74 new standards In the first phase of monitoring and implementation, the proportion of cities that met the ambient air quality standards was only 4.1%, and the other 256 cities implemented the old air quality standards, and the proportion of cities that met the standards was 69.5%.
Air purifier sales increased by 90.5% compared with last year
According to a report recently released by the China Electronics and Information Industry Development Institute, due to the haze weather, air purifiers have become the most concerned home appliance products, with sales of nearly 2.4 million units nationwide last year, a year-on-year increase of 90.5%; retail The amount reached 5.6 billion yuan, a year-on-year increase of 105.9%.
HEPA filter needs to be replaced in March
The filter of the air purifier is the same as the filter of the water purifier, and it is not effective for a long time. After long-term use, the accumulation of dust on the surface of the filter will also cause the filter to gradually fail. Therefore, when the haze is more serious, the non-washable HEPA filter needs to be replaced every three months.
Merchants claim that the purification rate is more than 99% for the concept of stealing
99% or even 99.99% seems to have become a slogan for many air purifiers on the market. Many brands of products promote their high removal rate of PM2.5 and formaldehyde. In fact, this kind of publicity is more of a kind. The slogan of stealing the concept, the removal rate of 99% is the effect of the material itself on PM2.5 and formaldehyde, not the effect of actually running in space.
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Ningbo Zhe Kai Electric Appliance Co.,Ltd , https://www.cnairpurifiers.com