Bipolar battery made from thin film composite material and bipolar plate base of bipolar battery

Abstract

The invention relates to the technical field of batteries, in particular to a bipolar battery made from a thin film composite material and a bipolar plate base of the bipolar battery. The bipolar battery comprises the base and one or more conductive particles arranged in the base, wherein the base is made from a thermoset or thermoplastic high-molecule polymer; the conductive particles are uniformly distributed in the base; the diameter of each conductive particle is greater than the thickness of the base; and the conductive particles are protruded from the upper surface and the lower surface of the base. According to the bipolar battery made from the thin film composite material and the bipolar plate base of the bipolar battery, the thermoset or thermoplastic high-molecule polymer is adopted, and the conductive particles are embedded into the bipolar substrate, so that a high-performance storage battery can be prepared; and furthermore, under the condition of 80 percent of discharge, the battery can be used for more than 1,000 times, so that the technical shortcomings in the prior art are overcome, and multiple technical barriers are solved. The prepared bipolar thin film composite material battery has the advantages of high corrosion resistance, light weight, low cost and the like and can meet the condition of large-scale manufacturing.

Description

technical field [0001] The invention relates to a battery, in particular to a thin-film composite bipolar battery and a bipolar plate matrix. Background technique [0002] Batteries are divided into primary batteries and secondary batteries, where secondary batteries refer to batteries that can be repeatedly charged and discharged. The earliest and most widely used secondary battery is the lead-acid battery, which can be designed with unipolar or bipolar, and there is also a quasi-bipolar design that can be used alternately with unipolar and bipolar. [0003] In a conventional monopolar battery, the current generated by the active material is sent to the current collector and through interconnected tabs to the next cell. The bipolar battery is much superior to the traditional unipolar battery in terms of power output, because the active material is coated on both sides of the bipolar substrate, the current can flow from the substrate to the next battery, and the current pat...

AI Technical Summary

Problems solved by technology

[0006] (1) The sealing problem between adjacent single cells;

[0007] (2) Power loss due to contact resistance;

[0008] (3) Corrosion of bipolar plates due to electrolyte;

This lead-acid bipolar battery has the problems of being difficult to seal, easy to corrode the substrate, and low capacity; there are also designs that use conductive adhesive to stick the titanium plate to the lead plate, and titanium is often passivated in lead-acid batteries, and In order to protect titanium, a layer of gold or lead coating is generally added, which will also increase the weight and cost of the battery; in other designs, gold-plated titanium plates or conductive plastics are used as substrates. difficulties in maintaining the availability of titanium plates and maintaining the availability of titanium, and attempts to add conductive fillers such as carbon, graphite, copper, or silver to widely available conductive epoxy derivatives have all failed due to reactions with the battery environment. Failed, while attempts to add glass-like carbon powder as epoxy filler were initially successful, but paste coating and active material chemicalization were less successful due to positive interfacial corrosion of the substrate

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