Battery packaging method and structure

Abstract

The invention relates to a battery packaging method and structure. A lithium ion battery is put into a plastic bag and vacuumizing is carried out; the plastic bag is filled with electrolyte, and therefore, a plastic battery pack is formed; the plastic battery pack is detected in a time interval; the plastic battery pack after detection is vacuumized again and is arranged in a hollow shell, and thehollow shell is internally provided with the space with a large opening and a shallow depth, so that the plastic battery pack can be more easily arranged in the hollow shell; and finally, the plasticbattery pack is sealed in the hollow shell by using a cover body, so that battery packaging is completed.

Description

technical field [0001] The invention relates to a battery packaging method and structure, which aims at packaging the battery to increase its service life and reduce its manufacturing cost. Background technique [0002] Lithium-ion battery is a rechargeable battery that relies on the movement of lithium ions between the positive electrode and the negative electrode to work. When the lithium-ion battery is charged, lithium ions will be generated on the positive electrode of the lithium-ion battery, and the generated lithium ions will move through the electrolyte. to the negative electrode, and the carbon used as the negative electrode has a layered structure, which has many micropores, and the lithium ions that reach the negative electrode will be embedded in the micropores of the carbon layer. The more lithium ions are embedded, the higher the charge capacity, and the opposite , when the lithium-ion battery is discharging, the lithium ions embedded in the carbon layer of the...

AI Technical Summary

Problems solved by technology

[0004] Generally, lithium-ion batteries are divided into aluminum-case lithium-ion batteries and soft-pack lithium-ion batteries. Aluminum-case batteries cover the lithium-ion battery with an aluminum case, which adopts a laser fully sealed sealing process to seal the lithium-ion battery in the aluminum case. , but when cladding the aluminum shell, the size of the opening of the aluminum shell is larger than that of the lithium-ion battery, so that the lithium-ion battery can be placed in the aluminum shell, so that when the aluminum shell lithium-ion battery moves or collides , the lithium-ion battery in the aluminum case is easily damaged due to external collisions. The soft-pack lithium-ion battery is regarded as an aluminum-plastic composite package containing aluminum foil on the outer layer of the liquid lithium-ion battery, but the soft-pack lithium-ion battery The aluminum-plastic film used for packaging is made of a special material, so the price is very high, and the aluminum foil in the middle is not easy to connect to the positive electrode of the battery. Therefore, after the battery is used for a period of time, the inner layer mold deteriorates and it will contact the electrolyte. Because of no potential protection, it will react with the electrolyte and produce black spots that consume the electrolyte. The gas produced by the liquid degrades the battery rapidly and the mechanical strength is not high. If an internal short circuit occurs, the lithium-ion battery is easy to bulge and exhaust to reduce the risk of explosion

[0005] And generally, when a lithium-ion battery is installed in an aluminum casing or a metal casing, the metal casing is usually deep-drawn to form a cylindrical barrel-shaped structure or a rectangular tank body, so that the deep-drawing depth is greater than the The processing cost of the cylindrical diameter (narrow side) is very high, and if the lithium-ion battery is to be placed in the cylindrical barrel structure, its diameter must be made smaller than the diameter of the cylindrical barrel structure, so that it can be placed It is easy to damage the battery during the insertion process, such a combined structure will cause the battery to move during use, and the internal battery will collide with the metal shell, causing damage and reducing its life

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