Four safety performance indicators of lithium-ion batteries

Four safety performance indicators of lithium-ion batteries In order to ensure the safety, stability and reliability of lithium-ion batteries, a very strict and thorough lithium-ion battery will be specially designed for the safety performance of lithium-ion batteries, so as to achieve lithium-ion batteries. Safety evaluation index of ion battery. The safety of lithium-ion batteries is also the most important issue. 1) 135℃ automatically closes the diaphragm to protect the international advanced PE-PP-PE three-layer composite film. When the temperature of the lithium-ion battery reaches 120°C, the membrane pores on both sides of the PE composite membrane are closed, the internal resistance of the lithium-ion battery increases, and the internal temperature of the lithium-ion battery decreases. When the temperature of the lithium-ion battery reaches 135°C, the PP film hole is closed, the internal circuit of the lithium-ion battery is disconnected, and the lithium-ion battery no longer heats up, ensuring the safety and reliability of the lithium-ion battery. 2) Under the condition of adding additives to the electrolyte, the lithium-ion battery is charged, the voltage of the lithium-ion battery is greater than 4.2v, the electrolyte additive and other substances are polyelectrolytes, the internal resistance of the lithium-ion battery is greatly increased, and a large area of u200bu200bopen circuit is formed The device is in the lithium-ion battery, and the temperature of the lithium-ion battery is no longer added. 3) Lithium-ion battery shell composite structure The lithium-ion battery cover adopts a notched explosion-proof ball structure. When the lithium-ion battery heats up, part of the gas that occurs during the internal activation of the lithium-ion battery expands and the internal pressure of the lithium-ion battery increases. The pressure reaches a certain degree of gap rupture and exhaust. 4) Various environmental damage tests Carry out various abuse experiments such as external short circuit, overcharge, acupuncture, electric shock, incineration, etc., to investigate the safety performance of lithium-ion batteries. Temperature shock test and vibration of the lithium-ion battery pack, drop, impact, such as mechanical performance experiments, medical equipment, industrial mobile lighting, lithium-ion batteries, lithium-ion batteries, military hand drums, lithium-ion batteries, lithium-ion batteries, electric bicycles, lithium-ion batteries, power tools , Laptop computers, industrial instruments, lithium-ion batteries, lithium-ion batteries, a variety of lithium-ion batteries and lithium-ion battery products, the products are exported to Europe, America, the Middle East, Southeast Asia and other markets. How to activate the nickel-metal hydride rechargeable battery 1. Due to the upper and lower protection voltages of the protection board, high voltage cannot be used to activate the nickel-metal hydride rechargeable battery. High voltage will burn out the MOS tube on the protection board. The positive and negative poles of the charger should directly charge the positive and negative poles of the battery. When the voltage rises to the lower voltage of the shielded wire, the shielded wire will discharge normally. 2. The activation purpose of the old and new Ni-MH batteries is different. The short circuit test should not be used to activate a new battery. After long-term use, the capacity of old NiMH batteries will decrease. At the same time, the effective output of the capacitor will be affected by the oxide layer appearing on the internal electrodes, which increases the internal resistance of the battery. The decrease in capacitance is irreversible. Therefore, reducing the internal resistance of the battery is the key to activating the old NiH battery, otherwise, the old NiH battery will become increasingly unable to adapt to high-current devices. 3. The self-discharge capacity of Ni-MH battery is large, and the battery will gradually lose power in the long-term transition process, which will reduce the battery's activity and make the battery enter the dormant state. The battery has not been charged and discharged for many times. Due to the memory effect of the Ni-MH battery, the output capacity cannot reach the rated capacity. In the specific charging and discharging method, three full charging and discharging are generally used, and the charging method is 0.1c. This is because the battery is not activated, the charging intensity is low, and high-current charging will damage the electrodes. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Is there a substitute for lithium-ion batteries?