Lead-acid storage battery and lead-acid storage battery pack

Abstract

The invention discloses a lead-acid storage battery. The storage battery comprises a positive electrode, a negative electrode, a battery shell and a current converging body, wherein the positive electrode and the negative electrode have columnar strip physical shapes; a positive electrode columnar strip and a negative electrode columnar strip are parallel to each other and are arranged in an adjacent or nesting manner; the positive electrode columnar strip and the negative electrode columnar strip are isolated mutually by an isolation plate; each of the positive electrode columnar strip and the negative electrode columnar strip comprises an active material and a current collector; at least one part of each current collector is arranged in the interior or on the surface of the corresponding active material; and one end of each current collector is conductively contacted or combined with the corresponding active material while the other end is conductively connected with at least one kind of the current converging body, a connecting body between batteries or a battery output end point. The invention also discloses a lead-acid storage battery pack formed by the lead-acid storage battery. By means of improving the shapes and the array arrangement structures of the positive electrode and the negative electrode of the lead-acid storage battery, the performance of specific energy, deep discharging, high-current discharging capability, cycling life and the like of the lead-acid storage battery can be greatly improved.

Description

technical field [0001] The invention relates to accumulators, in particular to lead-acid accumulators and lead-acid accumulator groups. Background technique [0002] Lead-acid batteries have been invented by the Frenchman Planté in 1859 and have a history of more than 150 years, during which they have undergone many major improvements. Technological progress and its inherent electrochemical system characteristics have made it relatively cost-effective, stable and safe, and it has become the most widely used secondary battery with the largest market share in the world. It is widely used in transportation, communication Base stations, energy storage, traction and other fields. However, with the development of related industries and the rise of emerging industries in recent years, the performance of existing lead-acid batteries, such as specific energy, specific power, service life, etc., is expected to reach a better and higher level. Therefore, on the basis of the existing ...

AI Technical Summary

Problems solved by technology

In the current application, the manufacturing process of the planar grid lead-acid battery is relatively simple, but the specific energy of the product is relatively low, the deep discharge and high current discharge capabilities are relatively poor, and the cycle life is relatively short; the deep discharge of the tubular lead-acid battery The capacity and battery life have been relatively improved, but the compatibility of the preparation process of the positive and negative electrodes is poor, so the process is more complicated, and the battery specific energy and large current discharge capacity are still not ideal; the life of the wound lead-acid battery , specific energy, and high-current discharge capacity have been relatively well improved, but this product has high requirements for manufacturing process control and expensive equipment costs, and when forming a battery pack, its cylindrical single-cell appearance makes the entire battery pack The volume specific energy also becomes lower; bipolar lead-acid batteries and foam grid lead-acid batteries have inherent shortcomings that are difficult to overcome due to the inherent shortcomings of the electrode collector materials used, such as passivation and difficulties in mass production. It has basically remained in the laboratory stage for many years; supercapacitor lead-acid batteries or lead-carbon batteries, although simulation applications under high-rate partial state of charge (HRPSoC) have obtained good results reports, such as high-current charging In terms of discharge performance and cycle life, but there are difficulties in the manufacture and use of capacitor electrodes and battery electrodes, and the problem of battery thermal runaway, which makes it difficult to be popularized for many other applications.

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