Cylindrical heat dissipation explosion-proof lithium battery

Abstract

The invention discloses a cylindrical heat dissipation explosion-proof lithium battery. The cylindrical heat dissipation explosion-proof lithium battery comprises a protective shell and a lithium cellarranged in the protective shell; the top end of the protective shell is fixedly connected with an upper cover plate; a positive electrode electric shock piece is fixedly arranged on the surface of the upper cover plate in a bonding mode; the inner bottom of the protective shell is fixedly provided with a fixed frame through screw threads; the fixed frame abuts against the bottom of the lithium cell; a fan is fixed at the bottom of the fixed frame; the bottom end of the protective shell is fixedly connected with a lower cover plate; heat dissipation air ducts which are longitudinally distributed are arranged between the lithium cell and the inner wall of the protective shell. By virtue of the fan, convection air can be formed in the heat dissipation air ducts, so that heat is brought out,and the heat dissipation effect is high; due to the fact that the protective shell is made into a triangular shape with a circular angle, so that buffering and absorption of swelling in explosion canbe realized by virtue of deformation of the protective shell when the lithium cell is exploded, and extra damage caused by splashing of internal substances of the lithium cell caused by the explosionof the protective shell is prevented.

Description

technical field [0001] The invention belongs to the technical field of lithium battery devices, and in particular relates to a cylindrical heat dissipation and explosion-proof lithium battery. Background technique [0002] At present, lithium batteries do not contain or produce any lead, mercury, cadmium, etc. due to their high rated voltage, high energy storage and long service life, especially green environmental protection, regardless of production, use and scrapping. Toxic and harmful heavy metal elements and substances are accepted by people and gradually replace the nickel-cadmium batteries that have occupied the market for nearly a hundred years. Due to the high power of the lithium battery during charging and discharging, it will generate a lot of heat, which needs to be dissipated in time. [0003] For this reason, the patent application number is CN201420288223.8, which discloses a lithium battery with high-efficiency heat dissipation effect, including a casing an...

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Problems solved by technology

[0004] However, the above solution has the following defects in use: the heat dissipation efficiency is low when transferring heat, which is not conducive to the rapid heat dissipation of the lithium battery. In addition, if the lithium battery explodes, the shell cannot buffer and absorb the expansion generated during the explosion, and eventually the shell bursts. , causing additional damage to lithium battery contents from splashing

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