A positive electrode powder lithiation contact interface automatic renewal mechanism

Abstract

The invention provides an automatic updating mechanism for a contact interface of lithiation of positive electrode powder. The automatic updating mechanism is placed in a constant-gaseous-environment catalyst case and comprises a lithiation disc, supports, a transmission base plate, a crossbeam, springs, mechanical lithiation teeth, fixing pins, stop nuts and a lithiation crossbeam, wherein the tail ends of the mechanical lithiation teeth are sleeved by the springs, then the mechanical lithiation teeth are inserted into corresponding holes in the crossbeam and then the stop nuts are screwed on the tail ends of the mechanical lithiation teeth; positioning pins protruding from the bottom of the lithiation disc are inserted into corresponding holes in the transmission base plate; and the lithiation crossbeam is placed on the support and the fixing pins are inserted. Preferably, after the tail ends of the mechanical lithiation teeth pass through the crossbeam, the stop nuts are connected with the tail ends of the mechanical lithiation teeth through threads. The mechanical lithiation teeth and the crossbeam are positioned via the stop nuts, and the stop nuts are pressed to the crossbeam via the pressure of the springs. The lithiation disc and the transmission base plate are positioned via cylindrical pins. Preferably, the lithiation disc and the supports are positioned via pins.

Description

technical field [0001] The invention belongs to a special mechanical stirring mechanism used for updating the powder interface to continuously contact the gaseous catalyst in the processing of the positive electrode material of the thermal battery, and is a general invention achievement in the field of mechanical engineering. Background technique [0002] Unlithiated positive electrode powder can cause voltage spikes at the initial stage of hot battery discharge, affecting battery voltage accuracy and working life [1] . Therefore, it is necessary to carry out lithiation treatment on the positive electrode material, that is, after adding a lithiation agent to the positive electrode material, it is continuously contacted with the gaseous catalyst for reaction. Since the reaction belongs to the slow reaction of the interface layer between the powder surface and the gaseous catalyst, the entire lithiation process needs to continuously update the powder contact interface. In th...

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Problems solved by technology

[0003] Since the update rate and uniformity of the powder interface have a great influence on the lithiation effect, it is difficult to meet the update requirements of the powder interface by manual operation, resulting in a decrease in the uniformity of the lithiation reaction and affecting the quality consistency of the positive electrode powder.

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