Electrode structure of lithium battery

Abstract

An electrode structure of a lithium battery, an electrode structure in which the positive electrode and the negative electrode of the battery in the tank of the lithium battery are electrically connected to the outside, comprising: a cover plate body (100); an electrode body (200) made of at least a sheet metal material, The covered part is arranged in the cover body (100), and the two ends of the covered part (210) are respectively formed with bent parts (201, 202), and the bent parts (201, 202) are respectively extended to form a connection The part (220) and the output part (230) are exposed from the surface of the cover body (100). Through coating and non-direct penetration, the conductive electrode structure of the lithium battery is formed to achieve the sealing effect of the conductive part of the electrode.

Description

technical field [0001] The invention relates to an electrode structure of a lithium battery, in particular to forming a conductive electrode structure of a lithium battery by means of coating and non-direct penetration, so as to achieve the sealing effect of the conductive part of the electrode. Background technique [0002] Due to the great breakthrough in material technology, lithium battery can be used as a power supply with high power demand (such as: lithium iron phosphate secondary battery), such as used in equipment with high power demand such as electric bicycles and electric wheelchairs. The storage capacity and power supply capacity of the secondary lithium battery with water electrolyte are larger than that of the traditional lithium battery. The battery can of the aforementioned secondary lithium battery is usually an aluminum metal can. Generally speaking, the metal can is made of aluminum or stainless steel and has a cylindrical or square shape with at least on...

AI Technical Summary

Problems solved by technology

[0006] 1. The electrode structure in the penetrating mode, although the sealing effect can be achieved through the insulating sheet, after a long time of use, the insulating sheet generally made of rubber will have a gap due to aging, and the through hole will no longer be sealed. state, water vapor will enter the metal tank of the battery from here, reducing the service life of the battery

[0007] 2. External electrodes of rigid materials, when two or more lithium batteries are connected in series or in parallel through electrical connection components, if the electrical connection components are also steel materials, when used in high-vibration environments such as electric bicycles and electric wheelchairs, Due to the relative stress of the steel material, the electrode through hole will be destroyed and deformed, so that the through hole is not sealed, and water vapor will enter the battery metal tank from here, reducing the service life of the battery

In the same way, when a large number of electrons pass through the electrodes, heat energy will be generated due to the impedance passing through the cover plate, so the temperature will increase during charging, and the temperature rise effect will further lead to a vicious cycle of further increase in impedance, which will affect the safety of use. bad

Furthermore, when a large amount of charge is driven by the voltage and passes through the electrode, the resistance of the electrode increases, and the efficiency of charging and discharging naturally decreases

[0009] 4. The current electrode structure in the penetrating mode needs to be installed with insulating sheets and other sealing components to penetrate the cover plate. To meet the sealing standard, the manufacturing difficulty and cost are quite high.

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