Current collector of capacity type battery

Abstract

The invention discloses a current collector of a capacity type battery. The current collector of the capacity type battery comprises: an annular main body, the annular main body is provided with an axially cut-through opening, the main body is provided with a plurality of through holes, and the upper end of the main body is provided with a strip-shaped tab and a positioning sheet horizontally extended outwards. The main body with an opening is adopted to allow the current collector to be easy to install, the current collector is clamped and then is installed after the outer diameter of the current collector is reduced by applying small force during assembly, the outer wall of the current collector can be in close contact with a positive carbon ring after rebounding due to certain elasticity of the material of the current collector, the inner wall of the positive carbon ring cannot be damaged, the internal resistance of the battery can be well reduced, and the increase of the internal resistance of the battery in the later use period is ensured to be small.

Description

technical field [0001] The invention relates to battery production, in particular to a current collector of a capacity battery. Background technique [0002] Existing current collectors are all cut into small pieces by steel mesh or nickel mesh, and then spot welded to the positive core rod. The general shape is a strip along the length of the core rod, such as figure 1 shown. The structure of the existing lithium sub-battery is: the inner wall of the lithium sub-battery is closely attached to the annular lithium belt, the positive electrode particles (90wt% or more are acetylene black) are compressed and filled in the cavity of the lithium belt, and the top, bottom, and outer walls of the positive electrode particles are Both are equipped with diaphragms, and there is electrolyte in the positive electrode particles. When the existing current collector is applied to the structure of the lithium sub-battery, it has the following defects: [0003] (1) Due to the relatively s...

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Problems solved by technology

[0003] (1) Due to the relatively small area of ​​the mesh surface of the current collector in contact with the positive electrode, the distribution area of ​​the positive electrode particles is limited after the positive electrode particles are inserted, which will lead to poor current collection effect, especially when the battery is lying flat, if the mesh surface of the current collector Just in a horizontal state, it is difficult to collect the current above, and its discharge performance is even less ideal;

[0004] (2) When the core rod and the current collecting net are inserted into the positive electrode granular material, it will cause damage to the positive electrode granular material. Sheet material is punched, and there must be thorns on the edge, and the thorns will also destroy the spherical structure of carbon particles when the current collecting net is inserted into the positive electrode;

[0005] (3) Since the core rod and the current collecting net need to penetrate the diaphragm (mask) on the top of the positive electrode particles, it is easy to make the edges around the mask warp up, causing the internal positive electrode particles to fall out. Due to the fluidity of the electro-hydraulic, the carbon positive electrode particles will flow After that, it will directly contact with the negative electrode lithium strip, causing the internal short circuit of the battery, which will reduce the output capacity or the battery will be exhausted in advance during actual use.

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