Extend the life of lithium batteries -Lithium - Ion Battery Equipment

How to extend the service life of lithium batteries? -Lithium - Ion Battery Equipment

Recently, the letter presented by the Beijing Municipal Party Committee was published in the new energy passenger vehicle production company and product record management regulations (revised in 2015), compared with the 2014 version and the 2015 version of the rules to adjust the vehicle and power lithium battery warranty, including power lithium battery, etc. The supply of key components is guaranteed for not less than 5 years or 100,000 kilometers, and the supply is guaranteed for not less than 8 years or 120,000 kilometers. According to people familiar with the matter, Shanghai is also considering increasing the warranty period of power lithium batteries. According to the automotive and battery quality assurance service standards announced by major automakers, most power lithium batteries have a warranty period of 5 years and a warranty period of 100,000 kilometers. Much depends on the charging method.(Lithium - Ion Battery Equipment)

Beijing and Shanghai, as demonstration cities for promoting national new energy vehicles, were revised in response to the local management rules in May of this year, and the four ministries and commissions announced the application of new energy vehicles in the 2016-2020 financial support policy notice and put forward clear requirements for quality assurance, new energy Automobile production companies should supply power lithium battery energy storage devices, drive motors, motor controllers and passenger car production companies with guaranteed quality to consumers for not less than 8 years or 120,000 kilometers (whichever comes first).

According to battery industry insiders, some batteries that boast an eight-year warranty may not meet that standard. Due to the individual differences in the production and manufacture of single cells of lithium-ion battery packs for electric vehicles, the degree of aging in use is also different. If proper measures are not taken during the charging process, these differences can accumulate and expand, resulting in a significant decrease in overall battery performance or a severe reduction in battery life. Therefore, different charging methods are an important factor affecting the performance and service life of single lithium-ion batteries. Proper charging not only maximizes battery capacity, but also extends battery life.

Fast charging has been a hot topic after discussion, overcharging a large DC over fast is like pouring water into a bucket with rapids, in the long run, the bottom of the bucket will be thin or even cracked, if the first is soft, the battery can withstand the voltage , current, temperature, etc. are moderately affected, and life is bound to be prolonged. The fast charging solution needs to maintain the health and service life of the battery, meet the use efficiency, and pay attention to safety. Lithium-ion batteries are more prone to abnormal conditions such as high temperature and overcharge during high-speed charging. Ignoring the operating status of the battery, a large proportion of lithium-ion battery charging will seriously affect the service life of the lithium-ion battery, and even cause danger. It is necessary to closely monitor the use of the battery, the battery, and the flexible control of the entire life cycle curve, voltage, Resistance, temperature, SOC and SOH detection and monitoring, monitoring environment, temperature, temperature difference, at the same time, actively maintain the health of the battery, prolong the battery life, and reduce battery safety risks.

In a presentation to the American Chemical Society (ACS), Mikael Cugnet, a battery expert at the French Atomic Energy Commission, suggested that EV batteries could last up to 20 years if used properly. Current lithium-ion battery life estimates based on accelerated testing are typically around eight years, Cugnet said, but this does not necessarily accurately reflect the actual lifespan of lithium-ion batteries. He believes that, with proper use, electric vehicle batteries can run reliably for 15 years, and possibly up to 20 years. Much depends on how the user charges, and at what temperature.

For consumers concerned about electric vehicles, in addition to anxiety, they are worried about the quality of power lithium batteries. As the core component of electric vehicles, once the battery capacity is greatly attenuated and the service life is shortened, it will cost money to repair or replace the battery. Yes a cost advantage will disappear. Therefore, it seems that only charging equipment companies can solve this problem for consumers and develop charging technology and solutions that can really extend battery life as soon as possible, making the battery warranty period more realistic.



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