Vibration and shock may have a certain impact on lithium batteries. In order to ensure the safety and stability of products leaving the factory, countries and the United Nations have clear laws and regulations on the production, transportation, packaging, and other aspects of lithium batteries. There are specific requirements for vibration and impact testing.

Most application scenarios of lithium batteries may cause vibration and drop impact, such as lithium battery vehicles, lithium battery electronic products, etc.

Nuocheng Safety summarizes several aspects of the impact of vibration and shock on lithium batteries for you:

Capacity loss: Long term or significant vibrations and impacts may cause the peeling or damage of active materials in lithium batteries, thereby reducing the battery's capacity and affecting its performance. Especially inside the battery, vibration and impact may cause the separator between the electrolyte and the electrode to rupture or be damaged, leading to interference with the electrochemical reaction.

Short circuit risk: Strong impact or vibration may cause displacement or compression of internal components of the battery, increasing the risk of short circuit. If the positive and negative electrodes come into direct contact, it will cause the rapid release of heat and gas from the electrolyte inside the battery, which may lead to battery explosion or fire.

Overheating risk: Due to vibration or impact, the welding of electrodes and other components may become loose, resulting in a decrease in contact area and poor contact, leading to increased heat release at the contact position during charging. More susceptible to thermal runaway, i.e. uncontrolled increase in temperature, which may pose a fire risk.

Lifecycle and stability: Vibration and shock may also accelerate the aging process of lithium batteries. Structural damage caused by vibration and impact, such as electrode material peeling or microcracks, can lead to a shortened battery life. In addition, vibration and impact may also damage the sealing performance of the battery, leading to electrolyte leakage or release of gas inside the battery, thereby affecting the stability and safety of the battery.

To mitigate the negative impact of vibration and shock on lithium batteries, Nuocheng Safety recommends taking the following measures:

Design and manufacture seismic protection measures: During the design and manufacturing process of batteries, reinforcement structures and cushioning materials can be used to reduce the impact of vibration and shock on the battery. For example, in mobile devices or electric vehicles, specially designed vibration absorbing materials can be used to protect the battery.

Optimize battery packaging and fixation methods: Ensure stable fixation of the battery and reduce the risk of internal component movement. The packaging design of batteries should take into account the effects of vibration and impact, and take appropriate measures to protect the internal structure of the battery.

Reasonable use and storage: When using and storing lithium batteries, it is necessary to avoid severe vibrations and impacts. Especially during long-distance transportation, appropriate measures should be taken to protect the battery from vibration and impact, such as using specially designed packaging containers or transportation vehicles.

In summary, vibration and shock can have a negative impact on the performance, lifespan, and safety of lithium batteries. Therefore, corresponding preventive and protective measures should be taken when designing, manufacturing, using, and storing lithium batteries to ensure their normal operation and safety. At the same time, in accordance with relevant laws and regulations, the product's resistance to vibration and impact is verified through simulated vibration testing, pressure testing, and drop impact testing. If relevant certificates are issued to meet the standards, it will facilitate the sales and transportation of lithium battery products. If the standard is not met, analyze the reasons for the non-compliance, start from the aspects of structure, process, and materials, find the problem, and solve it. Resolve safety hazards in advance to avoid losses caused by delays in transportation progress; To avoid losses caused by delays in sales progress; To avoid causing fire or battery explosion accidents, resulting in irreparable damage to product reputation.