Power tools are often used in life, family nuclear power related, whether it is charging or battery, its internal structure will have lithium batteries, lithium batteries are also an energy into a function of energy, so that, in use Also need to pay attention.

Although the aging of lithium batteries is understood to be the loss and destruction of lithium batteries, it is actually an effective way to screen out defective batteries. Only through the aging method can the lithium battery suitable for grouping be selected to improve the service life of the power tool.

The production process of lithium battery can be divided into three stages: front pole piece manufacturing, middle channel cell packaging, and rear cell activation. The purpose of battery activation stage is to fully activate the active material and electrolyte in the battery to achieve electrochemical Stable performance. The activation phase includes stages of pre-charging, formation, aging, and constant volume. The purpose of pre-charging and chemical formation is to allow the positive and negative materials to be charged and discharged for the first time to activate the material to make the material in an optimal state of use.

For a lithium battery in which ternary is used as a positive electrode material and graphite is used as a negative electrode material, a solid electrolyte membrane (SEI) is formed on the surface of the graphite negative electrode in a precharge phase of the lithium ion battery, and the formation potential of the film is about 0.8. Around V, the SEI allows ions to pass through without allowing electrons to pass therethrough, thereby inhibiting further decomposition of the electrolyte after forming a certain thickness, and can prevent battery performance degradation caused by decomposition of the electrolyte. However, the SEI film formed after the formation is compact and has small pores, and the battery is aged again, which will contribute to the reorganization of the SEI structure and form a loose porous film, thereby improving the performance of the lithium battery.

The aging of ternary/graphite lithium battery generally chooses normal temperature aging for 7 days to 28 days, but some plants adopt high temperature aging system, the aging time is 1-3 days, and the so-called high temperature is generally between 38 °C and 50 °C. High temperature aging is only to shorten the entire production cycle. Its purpose is the same as normal temperature aging. It is to balance the positive and negative electrodes, separators and electrolytes to achieve a more stable state.

The aging system of lithium titanate battery is generally preferred to the high temperature aging system, the aging temperature is 40 ° C -55 ° C, the aging time is generally 1-3 days, and the negative pressure exhaust is required after aging. A plurality of high-temperature aging is performed to fully react the internal moisture of the battery, and the gas is discharged to effectively suppress the flatulence problem of the lithium titanate battery and improve the cycle life.