06.22

2020

There are many reasons for battery charging, not necessarily battery quality problems

The battery is the most critical core component of electric vehicles, known as the "heart" of electric vehicles, in the use of electric vehicles, sometimes the battery drum situation. Once the battery is charged, many electric vehicle users think that it is a battery quality problem. In fact, there are many reasons for the battery charging drum, which is not necessarily a battery quality problem. 1. charger quality problems. At present, the electric vehicle market is flooded with a large number of inferior chargers. Some miscellaneous electric vehicles are mostly equipped with such chargers in order to reduce costs and increase profits. Many consumers do not pay attention to the quality of chargers and are greedy for cheap prices. They will also buy such chargers. Generally, the cost is only a dozen yuan. The electronic components of this kind of charger are basically made of inferior materials, which are easy to damage. The frequent problem is that the battery does not turn the light after it is fully charged, and the charging current cannot be adjusted according to the battery current, resulting in a large number of batteries overcharged. After that, the battery will be charged. Inferior charger is the primary cause of battery charging drum, accounting for about 70%. 2. the problem of charging time. Electric vehicle battery charging is generally not more than 8 hours, and many electric vehicle users for the convenience of the diagram, often overnight charging, charging time is often more than 12 hours, and sometimes even because of the forgotten charging time is often more than 20 hours, this is bound to cause great damage to the battery. Too long charging time leads to about 10% of the battery charging drum. 3. charger matching problem. At present, many families have two or more electric vehicles, and many electric vehicles are of different brands and batteries are of different models. Chargers are naturally different and cannot be used universally. However, some electric vehicle users often use them in a mixed way during use. Use a 60V charger to charge a 48V battery and a 20AH charger to charge a 12AH battery. The charging voltage and current do not match, of course, it will cause the battery to overcharge and flush. The matching problem of the charger causes the battery charging drum to account for about 10%. 4. often use fast charging stations for charging. At present, many cities have a large number of fast charging stations, on the one hand, it brings convenience to electric vehicle users, on the other hand, high-current charging of fast charging stations leads to serious gas evolution and water loss of batteries, and long-term use is also an important reason for battery flushing. Frequent use of fast charging stations causes the battery to charge about 5% of the drum. 5. the quality of the battery. The quality of the battery may also lead to the battery charging drum, but the battery charging drum phenomenon caused by quality problems generally occurs after one year of use, and only accounts for about 5% of the normal charging drum. Therefore, the proportion of charging drum caused by the battery quality is actually very small, but no matter what the reason is, the battery charging drum is often the black pot. Some batteries that are used within half a year are not caused by battery quality problems, 99% of which are not caused by experience. As an industrial product that needs after-sales service, it is normal for electric vehicles to have problems. Whether it is battery charging or not running far, it is a problem that electric vehicle batteries may encounter during use. We should have a good attitude to face it. The problem is not terrible, as long as the manufacturer can solve it responsibly, if it is indeed the cause of the battery quality, I believe the manufacturer will be responsible for the implementation of after-sales service in accordance with the relevant after-sales standards, do not worry.

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06.22

2020

Power battery revolutionary breakthrough is just a slogan?

2016年2月24日召开的国务院常务会议确定进一步支持新能源汽车产业的措施，以结构优化推动绿色发展。会议提出，加快实现动力电池革命性突破。推动大中小企业、高校、科研院所等组建协同攻关、开放共享的动力电池创新平台，在关键材料、电池系统等共性、基础技术研发上集中发力。中央财政采取以奖代补方式，根据动力电池性能、销量等指标对企业给予奖励。加大对动力电池数字化制造成套装备的支持。       那么该如何看待政府高层对新能源汽车，特别是纯电动汽车的发展态度呢？       首先，从目前已经上市并批量销售的纯电动汽车看，其基本续航里程平均在250-300公里，低端的只有150-200公里，高端的可达350-400公里。充电时间一般慢充6-8个小时充满，快充30分钟可达到80%的水平。       其次，就是电池的低温和衰竭问题还是较为突出的。一方面在北方寒冷地区，到了冬季，即便充满电，车辆也无法行驶应有的里程；另一方面随着连续使用，电池组逐年呈现快速衰减的情况，原来充满电能跑100%的，到了第二年可能只能跑80%，到第三年甚至只能跑50%。 此次国务院常务会议针对动力电池提出发展目标，应该说是切中要害。但是，何为“革命性突破”，却还未见任何权威解释。 一种理解就是未来新能源汽车的动力电池无论是续航能力、充电时间还是衰竭率，都取得突破性进展，充满一次电的续航里程与同级别传统燃料汽车相当，充电时间从目前的以小时计转为按分钟计，使用若干年后其仍有不低于85%的电能，这当然是一个完美的结局。       另一种理解就是虽然续航能力和充电时间没有实质性提升，但是动力电池的安全性得到有效提高，不因频繁的插拔而导致火灾等的发生，这样就为未来动力电池换电模式创造了良好的条件。       当然，如果在可预期的将来，既能使动力电池的续航能力得到提升，充电时间大幅缩短，同时还能确保其安全性更加可靠，那就更为完美了！ 然而，美好的理想与骨感的现实总是有着差距的。此次国务院常务会议提到的要协同大专院校、科研机构和企业的力量，其大方向应该是极为正确的，集中力量办大事是我们有中国特色的社会主义制度的最大优势。但是如何做到创新平台的开放共享，在市场化大环境下却是不易实现和做到的。该如何解决在相关的研发中，大专院校、科研机构和企业的分工问题？费用又该如何分担？最终相关的知识产权归谁所有？对企业改为“以奖代补”，以避免骗补行为，但是又该如何防范在大专院校及科研机构层面可能出现的骗补问题？ 此外，表面看，大专院校和科研机构应该更多地担当研究的任务，但是对于实用型产品，更多地是一个系统集成和数据积累的过程，此时企业恐怕更为强势，而且离开企业参与的研发最终能否商业化都是存在问题的。       最后，哪些企业可以参与其中？是只有车企可以参与，还是只要是有意愿的企业均可介入？是由国家搭建一个或若干个平台，还是由不同的企业与不同的院校组建研发联盟，广种薄收？这恐怕涉及到开始就如何在供给侧进行顶层设计和安排的问题，处理不好，难免一哄而起，一啸而散。 由于目前有些地方把混合动力汽车排斥在新能源汽车之外，而作为传统燃料汽车的一个过渡性产品，混合动力汽车对于传统车企来说，不但可以最大限度地利用已有的资源，减少浪费，同时也能实现减少对传统燃料的使用和减少排放。因此如果过于激进地跨越混合动力汽车这个门槛，而直接大力发展纯电动汽车，面对新能源汽车其实仍未最终确定的技术路线，虽然大力发展动力电池的方向不错，但是其结果能否如愿，实在令人担忧。希望“取得革命性突破”不是仅仅停留在激情的口号上，在新能源汽车发展初期政府有关部门提出的所谓“弯道超车”战略的经验教训应该予以汲取！

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06.22

2020

Modified Airflow Grinding of Calcium Hydroxide

Everyone should be very familiar with calcium hydroxide, and this product will be used in many fields. For example, this product is used as a plastic filler, which can not only achieve increment, but also reduce the cost of the product, but also improve some properties of plastic products. Of course, this is mainly due to its modified airflow crushing characteristics. In order to better understand the modified airflow crushing characteristics of the product for our normal use, let's take a look at what are the characteristics of modified airflow crushing. 1, from the volume effect, calcium hydroxide is a homogeneous system, the refinement of filler particles and strong dispersion in the resin is the key to the formation of homogeneous system, but refinement will enhance the agglomeration between particles. 2, the use of high-speed airflow action of the jet mill to make the particles collide with each other and refine, and the use of the high turbulence of the jet mill and the mechanical and chemical effects of particle collision, so that the surface modification of calcium hydroxide particles. 3. Compared with the traditional crushing and modification process, modified airflow crushing can simplify the production process and reduce equipment investment, which is very beneficial to reduce costs and improve economic benefits. 4, calcium hydroxide particle surface and matrix resin to form a strong interface affinity, unmodified particle surface contains a large number of hydroxyl groups, incompatible with the resin, the need for surface coating method in the particle surface structure of a layer of organic molecules. The characteristics of calcium hydroxide modified airflow pulverization and the promotion of the modified airflow pulverization process of the product will have an impact on the development of the filler industry, promote the agglomeration of molecules, and further enhance the performance of the modified hydrated lime. Therefore, the product is also widely used in the industrial industry. Of course, no matter how wide the product field is, the product is ultimately a chemical raw material, so corresponding protective measures must be taken in daily use, thus, accidents in operation engineering are avoided.

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06.11

2020

Use and consumption of wollastonite

Wollastonite is widely used in ceramics, plastics, asbestos substitutes, metallurgy, coatings and other departments because of its low water absorption, thermal stability and conductivity, and chemical inertness.

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06.11

2020

Processing of Wollastonite and Its Application in Coatings

Wollastonite belongs to a chain-like metasilicate, generally fibrous, needle-like. Because of its special crystal morphology and crystal structure determines its properties, wollastonite has good insulation, at the same time has a high whiteness, good dielectric properties and high heat resistance, weather resistance. Because wollastonite is widely used in ceramics, chemical industry, metallurgy, papermaking, plastics, coatings and other fields.

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