1. What does a lithium battery look like?
The answer to this question depends on how manufacturers design their lithium batteries, common lithium batteries on the market, in the appearance of the shape of the cylinder, there are rectangular, in the appearance of the color, lithium batteries have a blue appearance of the color, there are black, visible lithium batteries and the manufacturer of what looks like a great deal. Therefore, what the lithium battery looks like is uncertain.
Open the lithium battery lithium battery shell, you can find lithium batteries are basically black inside, this is because the lithium battery lithium in contact with air will form lithium metal oxides, and lithium battery oxides is black, which leads to you to open the shell of the lithium battery can be found inside is black.
For the internal structure of lithium batteries, different types of lithium batteries are also different between the common lithium batteries on the market are divided into rechargeable lithium batteries and non-rechargeable lithium batteries, the two lithium batteries have a great deal of difference in the structure, the following is about the construction of the two types of lithium batteries are specifically described.
1.1 Rechargeable lithium batteries
Rechargeable lithium batteries are mainly composed of positive electrode, negative electrode, diaphragm, organic electrolyte and battery shell, the positive electrode material is usually lithium iron phosphate, lithium manganate, etc., while the negative electrode material is mainly graphite or graphite-like structure of the carbon material, the diaphragm allows lithium ions to pass through the polymer film, the organic electrolyte is generally used in lithium hexafluorophosphate organic solvent, it is a kind of white solvent, and the battery shell may be steel, aluminium shell. case may be a steel case, an aluminium case, or an aluminum-plastic case.
1.2 Non-rechargeable lithium batteries
Compared with rechargeable lithium batteries, non-rechargeable lithium batteries are designed for one-time use, so the internal structure of non-rechargeable lithium batteries will be simpler, without too much consideration of the battery’s ability to withstand multiple charge/discharge cycles, and non-rechargeable lithium batteries are generally not equipped with a battery management system (BMS). Non-rechargeable lithium batteries are generally used in remote controls and other devices that do not require battery cycling capability.
2. How to judge from the appearance of lithium batteries can be used?
Because usually when a lithium battery is damaged, there will be some changes in the appearance, such as electrolyte leakage, cell expansion, or burn marks on the lithium battery connector. For example, if your lithium battery is in the state of overcharging, your lithium battery internal heat will accumulate rapidly, which will lead to the phenomenon of battery surface expansion. These abnormal conditions occurring on the outside of the lithium battery are indicating to you that your lithium battery has been damaged, in order to protect your life and property, it is recommended that you replace your lithium battery.
Of course, sometimes the appearance of lithium battery damage will not happen too much change, you can first let your lithium battery stop working, and then ask the professionals to test your lithium battery, they can determine whether your lithium battery can continue to use. Of course, installing a battery management system for your Li-ion battery will be a good choice, this system can monitor the status of your Li-ion battery in real time, thus reducing the probability of damage to your Li-ion battery.
3. Summary
In conclusion, the appearance of lithium batteries will not only change according to the different types of batteries, it will also be affected by the working condition of the battery. Therefore, when you can not judge whether the lithium battery is running well, you can make a preliminary judgment based on the appearance of the battery.
