Housing of cylindrical lithium ion battery pack

Abstract

The invention discloses a housing of a cylindrical lithium ion battery pack. The housing comprises a lower cover (3), wherein the cylindrical lithium ion battery pack (4) is arranged at the top of the lower cover (3) and covered by a hollow upper housing (1); the bottom of the upper housing (1) is open; the upper housing (1) and the lower cover (3) are fastened; a plurality of connecting bumps (31) are arranged at intervals on the peripheral edge of the top of the lower cover (3); a threaded hole (32) is formed in the outer side surface of each connecting bump (31); a plurality of screw through holes (11) are formed in the positions, corresponding to the threaded holes (32), of the upper housing (1); a countersunk screw (2) is arranged in each screw through hole (11) in a penetration manner; and the countersunk screws (2) are in threaded connection with the threaded holes (32). According to the housing, a gap formed when cylindrical batteries are combined can be fully utilized, the volume of the assembly structure of the screws is reduced, and the volume space of the battery pack is saved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a casing of a cylindrical lithium-ion battery pack. Background technique [0002] At present, lithium-ion batteries have the advantages of high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers, but also widely used in electric vehicles and electric bicycles. As well as large and medium-sized electric equipment such as electric tools, the safety requirements for lithium-ion batteries are getting higher and higher. [0003] Due to the wide application of lithium batteries, the appearance requirements of lithium-ion battery packs are also varied. In particular, many devices pursue compactness and portability, which require high volume-specific energy of lithium-ion battery packs. At present, cylindrical batteries are widely used. However, when cylindr...

AI Technical Summary

Problems solved by technology

At the same time, many products currently require severe shock and vibration environments, and require the battery pack to be made of metal. However, metal shells are generally connected by screws, and a large assembly structure space needs to be reserved for the screws, which takes up a lot of space in the battery pack. Therefore, the existing battery pack shell structure cannot save the volume space of the battery pack, and cannot guarantee the volume specific energy of the battery pack

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