18650 battery 2200mah

　　How to improve the safety index of new energy vehicle power 18650 battery 2200mah

　　How to improve the safety index of new energy vehicle power 18650 battery 2200mah? The safety of new energy vehicle power 18650 battery 2200mah has always been a concern for the majority of consumers. Although the safety of power 18650 battery 2200mah cannot be cured, it is controllable and preventable. We must face it correctly and actively explore some new safety technologies. , will help promote the progress of battery technology and can effectively improve the safety of battery systems.

　　How to improve the safety index of new energy vehicle power 18650 battery 2200mah?

　　There are many types of power batteries for new energy vehicles. Common ones include aluminum-air batteries, lead-acid batteries, ternary lithium batteries, lithium iron phosphate batteries, nickel-metal hydride batteries, etc. Among them, lithium batteries have relatively mature technology and stable performance at this stage. , the most widely used. Under the same volume and weight, ternary 18650 battery 2200mah have larger capacity, higher energy density and longer relative life than lithium iron phosphate batteries.

　　To achieve a qualitative improvement in the safety of power 18650 battery 2200mah, the most fundamental thing is to rely on the advancement of material technology. The thermal stability and safety of lithium batteries using high-temperature resistant ceramic coating separators are further improved, but the thermal stability of the cathode material has not been can be greatly improved, and the electrolyte has always used flammable and explosive organic systems.

　　The most fundamental solution to the thermal runaway of power 18650 battery 2200mah is to develop refractory or non-flammable electrolytes. In this way, even if various short circuits or thermal runaway situations occur, the battery will only heat up without violent combustion and explosion. The power lithium battery pack is the heart of electric vehicles and the key to the development of the new energy vehicle industry. Battery energy density and safety have become important indicators that determine product performance and are crucial to industry development.

　　As the culprit of new energy vehicle accidents, power 18650 battery 2200mah concentrate dozens of kilowatt-hours or even hundreds of kilowatt-hours of electricity into a small container. In this case, ensuring battery safety requires not only high-quality cathode materials, anode materials, and separators. , electrolyte and other battery raw materials, and the packaging of batteries and cells also requires higher technology.

　　How to improve the safety index of power lithium battery pack

　　Anti-collision: Battery applications have increasingly higher requirements for anti-collision performance. Ordinary battery packaging methods can no longer meet these requirements. Most batteries and casings basically have no fixing measures. When the battery is severely impacted, the tabs will break. , electrode short circuit may cause fire and other dangers.

　　Anti-flame retardant: Battery fires often occur when a single cell catches fire, causing surrounding cells to catch fire, and eventually causes the entire battery to catch fire or explode. In addition to strict control of battery materials, the external protection of the battery core is also very important.

　　Waterproof: A trace amount of water entering the battery will cause the electrolyte LiF6 to react to produce HF. HF will dissolve the positive active material, causing the battery capacity to lose, the moisture to increase, and a large amount of HF gas to cause the battery to expand or even burst. During use of the battery, the environment The moisture in the battery will slowly penetrate into the battery core, causing safety accidents.

　　Thermal conductivity: The electrochemical reaction at the electrode/electrolyte interface is related to the ambient temperature. Temperature has a great influence on the charge and discharge performance of lithium batteries. When the battery temperature exceeds 95°C, the battery life will be greatly shortened.

　　Causes of unsafe behavior of power 18650 battery 2200mah

　　① Metal impurities in materials;

　　② Process factors such as conductive dust on the surface of the separator, misalignment of positive and negative electrodes, burrs on the electrode pieces, and uneven distribution of electrolyte;

　　③ Application processes such as low-temperature charging, high-current charging, rapid attenuation of negative electrode performance leading to lithium precipitation on the negative electrode surface, vibration or collision.

　　The safety of power 18650 battery 2200mah: Since the thermal decomposition of the cathode material is only part of the thermal runaway reaction, caution should be taken when loading large-capacity batteries into vehicles. Secondly, due to the probability of battery testing, the power lithium battery pack that has passed the safety test cannot be proven to be absolutely safe. To be strict, the battery should be tested after a certain number of full charge and discharge cycles; the battery after low-temperature charging, the battery module and battery pack for safety testing.

　　The market's safety requirements and performance requirements for power 18650 battery 2200mah are the driving force for battery development. Manufacturers need to continuously promote the development and production of power lithium battery material technology, thereby improving the safety of lithium batteries. It is foreseeable that lithium batteries will become safer and safer, and new energy vehicle technology will become more mature.

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