Lithium ion battery pack provided with overload protection device and preparation process thereof

Abstract

The invention discloses a lithium ion battery pack provided with an overload protection device and a preparation process of the lithium ion battery pack. The lithium ion battery pack comprises a box cover, a handle, a material injection port, a box body, an air inlet, a filter screen, a thermometer, an exhaust port, a lithium battery, a sealing layer, a first fixing rod, a second fixing rod, a drypowder layer, a sliding rail, a fan, a limiting ring, a first fixing block, a second fixing block, a locking block, a second groove, a third groove, a sliding block and a through hole; according to the invention, external cold air is pumped into the box body through a motor; heat emitted by the lithium battery pack is blown out from an air outlet; a large amount of heat generated by overload of the lithium battery pack can be dissipated timely; through the design of the sealing layer and the dry powder layer on the box cover, fire disasters caused by the lithium battery pack are avoided, theuse safety of the device is improved, the quick assembly of the lithium battery is realized through the locking block after the sliding block is inserted into the third groove in the sliding rail, inaddition, the disassembly is convenient after the assembly, and the practicability of the device is greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium ion battery pack provided with an overload protection device and a preparation process thereof. Background technique [0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and uses a non-aqueous electrolyte solution. In the 1970s, M.S.Whittingham proposed and began to study lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become the mainstream. [0003] Lithium batteries are widely used in all aspects of life due to their excellent performance, but the battery current and voltage of a single lithium battery are less during use, so it is necessary to connect lithium batteries in series or...

AI Technical Summary

Problems solved by technology

[0003] Lithium batteries are widely used in all aspects of life due to their excellent performance, but the battery current and voltage of a single lithium battery are less during use, so it is necessary to connect lithium batteries in series or in parallel to form a battery pack. The process of splicing into battery packs is generally glued or welded, which is expensive, and cannot be disassembled after fixing, and has low practicability. Lithium-ion battery packs may be overloaded during use, resulting in a large number of batteries. Heat generation shortens the service life of the battery, and in severe cases, it may even explode and cause a fire. Moreover, today's battery packs do not have their own fire extinguishing device. Once a fire occurs, it will rapidly expand in a short time, which will damage people's property and lives. great threat to security

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