Shenzhen Yi Fang Technology Co., Ltd

Someone asked online: "Why are lithium batteries used in winter shorter than in summer?" The following is the answer from  Emergency Power Supply Factory . For  50ah Lithium Battery , there is currently no clear theory in the industry to support the inevitable connection of internal resistance, discharge platform, life, capacity, etc. at each temperature performance, and the related calculation formulas and mathematical models are still in the exploration stage. In general, lithium batteries are not sensitive to the temperature range of 0-40 ℃, but once the temperature exceeds this range, life and capacity will be compromised. There is no way to quantify the specific non-requirement, because the lithium battery is too active, and the consistency is also the biggest problem. Even the products of the same batch, the same material and the same process, the performance will be very different. 21700 Battery After many experiments, the low-temperature performance of lith...

As an  18650 3.7 v Battery Factory , share with you. There are relatively few problems in the battery of the brand mobile phone itself, and the problems in the battery itself mostly appear in the refurbished machine or the second mobile phone. In order to save costs, mobile phones or refurbished machines tend to choose lower-quality inferior batteries in the configuration of mobile phones. These batteries have low cost, too many impurities, but the design process is not close, and the risk of self-explosion is greater. 18650 Battery Long-term overcharge of the battery cell: Under a long-term charging state, overcharge and overcurrent will also cause high temperature and high pressure, causing hidden dangers. Lithium batteries may discharge momentarily under special temperature, humidity, and poor contact conditions to generate a large amount of current, causing spontaneous ignition or explosion. Battery short circuit: When the mobile phone is in a high temperature state, o...

As a  Lithium Battery For Ebike Factory , share with you. Regardless of whether it is evaluated from a technical point of view or from the perspective of price, the battery occupies a very important position. Nowadays, in the mobile phones currently on the market, the batteries used have basically completed the transition from nickel batteries to lithium batteries. Perhaps it is because the mobile phone battery has just completed a nickel battery to lithium battery revolution, so people's understanding of lithium batteries is not uniform, and incorrect statements and practices are quite popular. Therefore, it is very necessary to know a little bit about the knowledge of lithium batteries and to master the correct use of lithium batteries.  Samsung 21700 Battery 1. Types of lithium batteries: There are two types of secondary batteries currently on the market, nickel-metal hydride (Ni-MH) and lithium ion (Li-ion). Lithium-ion batteries have been mass-produced in two t...

As an  18650 Battery Factory , share with you. With the promotion of social energy conservation and environmental protection, more and more environmentally friendly products are being applied to the market. In the battery industry, lithium batteries quickly occupied the market with numerous advantages and gradually replaced traditional lead-acid batteries. For traditional batteries, lithium batteries have the advantages of long life, energy saving, environmental protection, no pollution, low maintenance costs, complete charge and discharge, light weight, etc. In general, lithium batteries have a long life, and to what extent do large-capacity lithium batteries grow? 4.2 v 18650 Battery In nature, lithium is a light metal with a small atomic mass. Its atomic weight is 6.94g / mol and ρ = 0.53g / cm3. Lithium has a lively chemical nature, and it is easy to lose electrons and be oxidized to Li +, so the standard electrode potential is negative, -3.045V, and the electrochemical ...

As an  18650 Battery Factory , share with you. Everyone knows that there are many types of batteries, but not every type will explode due to squeeze or puncture. As the name implies, a liquid battery uses a liquid electrolyte. The positive and negative electrodes of this battery are separated by a separator to avoid direct contact between the positive and negative electrodes. If the battery is punctured or squeezed, it may break the separator, causing a short circuit between the positive and negative electrodes, which will generate heat and generate a large amount of gas, and the battery will start to swell. Pansonic Battery ▲ Battery structure It is important to know that the liquid electrolyte in the battery is very lively and burns easily. After puncturing the casing, the electrolyte comes into contact with the air at high temperature, and at the same time, it emits smoke and emits sparks. Even a relatively safe lithium battery is very dangerous after being punctured,...

As a  Samsung Li Ion Battery Factory , share with you. 1. Overcharge The so-called overcharging is the process of continuing charging beyond the specified charge termination voltage (generally 4.2V). In the case of overcharging, the battery capacity will be attenuated, mainly due to the following factors: ①overcharging reaction of graphite anode; ②overcharging reaction of positive electrode; ③oxidation reaction of electrolyte during overcharging When the battery is overcharged, lithium ions are easily reduced and deposited on the surface of the negative electrode: Li + + e → Li (s) Samsung 21700 Battery The deposited lithium coats the surface of the negative electrode, blocking the insertion of lithium. The reasons for the reduction of discharge efficiency and capacity loss are: ①reduced amount of recyclable lithium; ②reaction of deposited metal lithium with a solvent or supporting electrolyte to form Li2CO3, LiF or other products; ③metal lithium is usually formed betwee...