Bipolar asymmetric supercapacitor energy storage apparatus and bipolar assembly thereof

Abstract

The invention discloses a bipolar assembly for a bipolar asymmetric supercapacitor energy storage apparatus. The bipolar assembly comprises: a substrate, wherein the substrate is insulated, and comprises two opposite surfaces; a positive electrode, wherein the positive electrode comprises a lead-containing active material and is positioned on one surface of the substrate; and a negative electrodepositioned on the other surface of the substrate, wherein the substrate has an electrical connection circuit so as to form electrical connection between the positive electrode and the negative electrode, and the negative electrode comprises a carbon-containing active material. According to the present invention, the carbon-lead battery technology and the bipolar battery technology are successfullycombined so as to effectively improve the performance of the energy storage device during the bidirectional high-power and high-frequency partial charging and discharging.

Description

technical field [0001] The invention mainly relates to the field of bipolar asymmetric supercapacitor energy storage devices, and also relates to a bipolar component used for the bipolar asymmetric supercapacitor energy storage device. In addition, it also relates to a vehicle or ship including the aforementioned energy storage device. Background technique [0002] Traditional lead-acid batteries have been used for more than 100 years. According to a common structure, a lead-acid battery unit includes several positive plates and several negative plates arranged alternately, and the positive and negative plates are separated by adsorption glass. A fiber mat (AGM) diaphragm separates. The surface of the AGM separator has many pores, so that charged ions and the like can pass through it. The positive and negative plates include a grid and an active material, wherein the grid mainly plays the role of mechanically supporting the active material and conducting electricity, and t...

AI Technical Summary

Problems solved by technology

However, this combination is not easy to achieve

First of all, because the carbon active material of the negative electrode is loose in texture and cannot be directly welded, it cannot form an effective electrical connection with the positive electrode on the substrate of the bipolar battery.

Secondly, the corrosion-resistant conductive coating disclosed in Chinese patent ZL200780047314.5 uses paraffin or rosin to seal the pores on the graphite film, but the melting point of paraffin or rosin is below 100°C, which cannot withstand the positive and negative electrodes of the bipolar battery passing through the substrate. The high temperature of about 180°C required when the conductive solder in the chip hole is connected together presents a serious technical conflict, so a solution to this conflict must be sought

Otherwise, if the paraffin or rosin melts, it will bring two risks: 1. Paraffin or rosin is an insulating material, and the melted paraffin or rosin affects the good electrical contact between the protective layer and the carbon negative active material interface, resulting in internal resistance of the battery Increase; 2. The paraffin or rosin seal failure part in the protective layer is no longer waterproof, the acid will penetrate the protective layer, contact and corrode the copper current collector, the copper sulfate produced by the reaction dissolves in water, pollutes the electrolyte, and eventually causes the battery Performance and lifespan drop

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