Battery Manufactory

Lithium-ion polymer batteries are widely used due to their long life and high capacity. However, there are some issues that can arise, such as swelling, unsatisfactory safety performance, and accelerated cycle life attenuation. Here we will primarily focus on battery swelling and its causes, which can be divided into two categories: the first is a result of a change in thickness of the electrode, and the other is a result of the gas produced by the oxidation and decomposition of electrolytes. 1. The change in thickness of the electrode pole piece When a lithium battery is used, the thickness of the electrode pole pieces, especially the graphite negative electrodes, will change to a certain extent. Lithium batteries are prone to swelling after high-temperature storage and circulation, and the thickness growth rate is about 6% to 20%. Of this, the expansion rate of the positive electrode is only 4%, the negative electrode’s is more than 20%. The fundamental reason fo...

What is a lithium polymer battery? Lithium polymer battery ( Li-polymer battery ), is a chemical battery. Compared with the previous battery, it has the characteristics of high energy, miniaturization and light weight. Lithium polymer batteries have ultra-thin features, and can be made into batteries of different shapes and capacities to meet the needs of some products. The theoretical minimum thickness can reach 0.5mm. The three elements of a general battery: positive electrode, negative electrode and electrolyte. The so-called lithium polymer battery refers to a battery system in which at least one or more of the three elements uses polymer materials. In the li-polymer battery system, most of the polymer materials are used in the positive electrode and electrolyte. The positive electrode material uses conductive polymer or inorganic compounds used in general lithium ion batteries, the negative electrode often uses lithium metal or lithium-carbon intercalation comp...

What's UL1642 certification? What's UL1642 standard for polymer lithium-ion battery? What's the test items of UL1642 certification? Wha's lithium polymer battery UL1642? UL is short for Underwriters Laboratories Inc. UL certification is a non-compulsory certification in the United States, mainly testing and certification of product safety performance, and its certification scope does not include the product’s EMC (electromagnetic compatibility) characteristics. It uses scientific testing methods to study and determine whether materials, devices, products, equipment, buildings, etc. are hazardous or harmful to life and property.
In short, it is mainly engaged in product safety certification and operating safety certification business. Its ultimate purpose is to obtain products with the right level of security for the market and to contribute to ensuring personal health and property safety. Lithium polymer battery UL1642 certification requirements cover...

Since the lithium-ion battery entered the market, it has been widely used due to its advantages such as long life, large specific capacity and no memory effect. Low-temperature use of lithium-ion batteries has problems such as low capacity, severe attenuation, poor cycle rate performance, obvious lithium evolution, and unbalanced lithium extraction. However, with the continuous expansion of application areas, the restrictions brought by the low-temperature performance of lithium-ion batteries have become more and more obvious. The discharge capacity of lithium-ion batteries at -20°C is only about 31.5% of that at room temperature. The operating temperature of traditional lithium-ion batteries is between -20 and +55°C. However, in the fields of aerospace, military industry, and electric vehicles, batteries are required to work normally at -40°C. Therefore, improving the low-temperature properties of lithium-ion batteries is of great significance. Factors restricting the ...

Safety comparison of lithium cobaltate, lithium iron phosphate and polymer lithium batteries. Many customers have a lot of disputes about the safety performance of lithium batteries. Compared with lithium cobalt oxide batteries and polymer lithium batteries, the most obvious advantage of lithium iron phosphate batteries is the extremely high safety factor and support for fast charging (high current charging). And a wider operating temperature range. From the current mainstream technology of lithium-ion batteries, there are mainly lithium cobalt oxide, lithium iron phosphate batteries and polymer lithium batteries. Their different materials and structural characteristics will affect the battery preparation technology and use, which will lead to The safety of coming is also different. 1. Lithium cobalt oxide battery: The safety of lithium cobalt oxide battery is poor and the cost is very high. It is mainly used for small and medium-sized batteries, widely used in noteb...