1. The metal plate is the steel sheet wrapped around the core of the polymer battery when it is packaged. The purpose is to protect the battery core and increase the hardness of the battery;
2. Break the polymer battery core casually. The inner core of a polymer battery is mainly composed of a negative electrode sheet, a positive electrode sheet and an insulating film. This insulating film is located between the positive and negative electrode sheets and serves to prevent contact between the two. The positive and negative electrode sheets to prevent short circuits. Insulating film is a very thin layer, generally about 0.02mm thick, is easily damaged. Once the separator is damaged, the positive and negative electrodes come into contact to form a short circuit. circuit, which will cause the battery to heat up or even catch fire. The separator may be damaged during the processbattery rupture. In addition, the battery rupture process will also damage the positive and negative electrode plates and the packaging tape, thereby affecting the performance of the battery.
3. After removing the metal plate, the battery's resistance to external mechanical puncture will be greatly reduced and safety will become worse. Polymer packaging bag is a layer of composite film, with a single supporting function. Aluminum foil with a layer of 0.04 mm has very low mechanical strength and basically does not have strong puncture resistance. Once the battery is pierced by external force, it will cause an internal short circuit, which may cause heat and fire.
4. Manual deformation of the soft battery will have a certain impact on the battery. Local force may damage the electrode sheet and separator. After deformation, this afwill affect the distribution of the electrolyte. However, if this is not the case, in severe cases the impact will not be particularly obvious.
PS: I have to say that your battery is too fake. Did you put it together yourself? There are size problems, it's weird that the soft packaging is so soft, and the packaging method is also very avant-garde! It is recommended to purchase genuine original batteries, but this involves the safety of people and property!
Lithium Polymer Battery
Pacific Automotive Network The main difference between them is the electrolyte. Liquid lithium ion batteries use liquid electrolytes, while lithium ion polymer batteries use solid polymers. Instead of using physical electrolytes, this polymer can be in a “dry” or “colloidal” state. Currently, most of them use polymer gel electrolytes.
Lithium Polymer Battery Overview Lithium polymer batteries generally refer to lithium-ion polymer batteries.
According to the different electrolytic materials used in lithium-ion batteries, lithium-ion batteries are divided into liquid lithium-ion batteries (LiquifiedLithium-IonBattery, called LIB) and polymer lithium-ion batteries (polymerLithium - IonBattery, called pLB) Or plastic lithium-ion battery (pLB for short).
The positive and negative electrode materials used in lithium-ion polymer batteries are the same as liquid lithium ions. Positive electrode materials are divided into lithium cobalt oxide, lithium manganate, ternary materials and lithium iron phosphate materials. and the negative electrode materials are graphite, and the working principles of the battery are basically the same.
Lithium battery classificationlymer: Solid: The electrolyte of the solid polymer electrolyte lithium-ion battery is a mixture of polymer and salt. This type of battery has high ionic conductivity at normal temperature and can be used at normal temperature. .
Gel: lithium-ion battery with gel polymer electrolyte, i.e. additives such as plasticizers are added to the solid polymer electrolyte to increase ionic conductivity and allow the battery to be used at room temperature.
Polymer: Due to the use of solid electrolytes instead of liquid electrolytes, compared to liquid lithium-ion batteries, lithium-ion polymer batteries have the advantage of being thinner , any area and any shape, so they can The battery shell is made of aluminum-plastic composite film, which can improve the specific capacity of the entire battery. battery ; lithium-ion polym batteriesera can also use polymers as cathode materials, and their specific mass energy will be more than 20% higher than the current one. liquid lithium-ion batteries. Lithium-ion polymer batteries (polymerLithium-IonBattery) have the characteristics of miniaturization, thinness and lightness. Therefore, polymer batteries will gradually increase their market share.
Principle of lithium polymer battery: Lithium ion batteries currently include liquid lithium ion batteries (LIB) and lithium ion polymer batteries (pLB). Among them, liquid lithium ion batteries refer to secondary batteries in which the built-in Li+ compounds are the positive and negative electrodes. The positive electrode uses lithium compounds LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode uses a lithium-carbon interlayer compound LixC6.
(Images/Text/Photos: Questions and answersfrom the Pacific Automotive Network)
The lithium polymer battery itself has no electrolyte and is in a conductive substance in a gel state.
The soft batteries you are talking about should be soft lithium-ion batteries. Many of them in China are mislabeled as polymers.
The main reason for the softness of this type of battery is that too much electrolyte is added during the production process, or the baking process of the clamp or clamp formation is missing. , so it becomes soft. It is also possible that the outer aluminum plastic film may be damaged, which can also cause softening.
If it becomes soft and cannot be charged, it should be because the battery is swollen. If you leave it for a while, you will find that the battery is as hard as it can be. a rock.
Did not damageDo not handle the battery at this time, as the lithium has been precipitated and lithium metal is very reactive and flammable.
It is recommended to replace the battery immediately.