As one of the important products of today’s future development, lithium battery has attracted much attention for its high energy density, long cycle life, light weight and many other advantages. However, due to its own materials, structure and usage methods, it is easy to cause safety problems such as over-discharge, high temperature, overvoltage, physical damage, etc., which may lead to combustion, fire, explosion and other safety issues; in fact, thermal runaway of lithium battery is the main factor affecting the safety of lithium battery, and the causes of thermal runaway of lithium battery are varied. Today, we will take a detailed look at what thermal runaway of lithium battery means and what are the causes of thermal runaway of lithium battery with Grep Battery?
What does thermal runaway of lithium battery mean?
The thermal runaway of lithium battery refers to a phenomenon in which the temperature inside the battery system rises due to some reason during the charging or discharging process, which in turn causes the battery to run away.
What are the causes of thermal runaway of lithium battery?
Battery use environment problems
In our modern life, batteries are everywhere. Whether it is mobile phones, tablets, notebooks, vehicles or household appliances, they all need the support of batteries. However, the battery use environment has always been the focus of people’s attention. In an inappropriate environment, the battery will fail, swell or even explode, posing a serious safety hazard. Therefore, this article will explore the battery use environment.
1. Temperature
Temperature is an important factor affecting the life of the battery. Too low or too high a temperature will shorten the battery’s service life. Generally speaking, the best operating temperature for the battery is between 20°C and 25°C. If the temperature is too low, the battery’s charging capacity decreases and its discharge capacity is also limited. High temperatures will cause the battery liquid to swell, which may rupture and cause leakage or explosion.
To address this issue, users should be careful to store the battery in a dry, room temperature place. Avoid exposing the battery to sunlight, high temperature, or storing the battery in a refrigerator, otherwise it may cause the battery liquid to freeze and shorten the battery life.
2. Humidity
Most materials in the battery are sensitive to humid environments. In high humidity conditions, the steel sheets, electrode copper, and gold plating in the battery will almost rust and oxidize, while the copper and gold-plated oxides cannot react, resulting in a reduction in the battery’s capacity and eventually death.
It is recommended to store the battery in a relatively dry environment, or place a desiccant around the battery to absorb moisture, so as to ensure the long-term service life of the battery.
3. Vibration and vibration
Vibration and vibration can cause the lead sheet inside the battery to rust and fall off. If the pot spring contracts and expands alternately, it may fall off due to random oscillation, causing the spacing of the electrode plates to change, resulting in a smaller battery capacity. At the same time, if the electrode plate contacts the shell, it may cause a short circuit in the battery.
In daily use, care should be taken to avoid vibration and collision of the battery, and avoid dropping the battery on the ground and other harsh conditions.
4. Other factors
In addition to factors such as temperature, humidity and vibration, there are some other factors in the battery use environment that may affect its life, such as oxidation, cracks, pressure changes, etc. Users should try to avoid placing and squeezing the battery for a long time during use to avoid hot and cold damage that makes the battery fail.
5. Future development
The future development trend of batteries is to develop safer and more environmentally friendly batteries under the general technical framework of increasing energy storage. Among them, the material selection and production process of environmentally friendly batteries are relatively strict, and the requirements for the battery use environment are relatively high.
At the same time, the development of wearable devices and storage components in the future is also being researched and developed. Products such as wearable electronic devices that grow or sleep naked and large-capacity battery storage components will attract more and more attention
