The coating process for lithium batteries is dangerous. Lithium-ion batteries are absolutely harmful to the human body. The most harmful thing is the electrolyte solution. The electrolyte is a volatile organic liquid and is obviously corrosive. Prolonged inhalation of volatile gases may cause damage to the respiratory tract.
If you manufacture battery cells, the contents inside the battery cells are harmful to the human body. It is not recommended to go there. You must wear a gas mask or face mask when you go there. work. I used to unknowingly open a bucket of stack ingredients, smoke it, and not be able to eat for a whole day. If you do PACK, it has virtually no impact on the body (some workstations must be exposed to organic solvents). ). It's harmful.
Notes
Storage requirements: In an environmentnment with temperature of 20±5℃ and humidity not more than 50%, corrosion of aluminum foil by air and water vapor should be avoided during transportation.
This product is divided into two types, A and B. The main characteristics of each are: the appearance of type A is black, the conventional coating thickness is 4-8μm on both sides and the conductive performance is more remarkable; the appearance of type B is light gray, and the conventional coating thickness is 2-3μm on both sides. Fewer welding layers can be done in the cladding area and the cladding machine can identify skip gaps.
Type B (gray) carbon coated aluminum sheet can be ultrasonic welded directly in the coating area. It is only suitable for soldering the tabs of laminated batteries (up to 2-3 layers of pole pieces), but the power and time of ultrasounds require fine tuning.
The heat dissipation of carbon layer is worse than that of aluminum foil, so the belt speed and baking temperature should be adjusted appropriately when coating.
This product can significantly improve the overall performance of lithium batteries and capacitors, but it cannot be used as the main factor to change some aspects of battery performance, such as the energy density of the battery. battery, performance at high and low temperature, high voltage, etc.
Reference for the above content: Baidu Encyclopedia - Lithium Batteries
Most of them belong to C category, while workshops with explosion-proof environments belong to category A.
Lithium battery assembly is the service of assembling and selling finished parts. GeneratedAlso, the assembly of individual lithium batteries does not require a safety license. The lithium battery non-standard product market is expected to provide services related to environmental protection, health and fire safety.
Once the lithium battery cell is overcharged to a voltage higher than 4.2V, it will start to produce side effects. The higher the overload voltage, the higher the risk. Once the lithium battery cell voltage is higher than 4.2V, the number of lithium atoms remaining in the positive electrode material is less than half. At this time, the memory cells often collapse, causing the battery capacity to permanently decrease.
If charging continues, since the storage compartment of the negative electrode has been filled with lithium atoms, subsequent lithium metal will accumulate on the surface of the mmaterial of the negative electrode. These lithium atoms will grow dendrites from the surface of the negative electrode towards the lithium ions.
How to buy lithium batteries
1. Is the capacity clearly marked? Batteries without a clearly marked capacity (such as 1000 mAh or 1000 mAh) are likely to be substandard or recycled batteries.Battery. Many inexpensive batteries on the market are made from recycled batteries. Although they are cheap, their lifespan is short and their unstable quality can damage the phone.
2. Is there guaranteed standby time? Standby time is the duration of continuous use from the time the battery is installed in the phone until the next charge. Generally, batteries sold in the market cannot guarantee standby time to customers. This is due to the fact that the quality of thebattery is unstable. Many cheap batteries use poor quality battery cores, so the standby time is very short.