Coiled battery with symmetrical composite mesh pole pieces, cocurrent electrodes and envelope-membrane safety valve

Abstract

The invention provides a coiled battery with symmetrical composite mesh electrode pieces, cocurrent electrodes and an envelope-membrane safety valve. The coiled battery comprises a battery casing and a battery core. The coiled battery is characterized in that the battery core is wound into a columnar body by winding a positive electrode piece, a negative electrode piece and a membrane around a core reel; a positive electrode current collecting plate and a negative electrode current collecting plate are arranged on the top of both ends of the battery core separately; the positive electrode piece is provided with a tab, with the same length as that of the positive electrode piece, on a top end of the positive electrode current collecting plate, the current collecting plate is provided with a spiral groove; a negative terminal is guided to a direction of the positive terminal of the battery through an electrode terminal protective jacket arranged on a side face of the battery casing; and the positive electrode piece and the negative electrode piece are composite mesh electrodes, a conductive fiber web with high strength is used as a bottom plate, a metal oxide coating such as ruthenium oxide which are distributed in strips and a negative electrode active material are arranged on the bottom plate. According to the coiled battery with symmetrical composite mesh pole pieces, cocurrent electrodes and an envelope-membrane safety valve, due to a unique end-face current collecting structure, as well as composite mesh electrodes, current conducting ability can be effectively improved, the battery has high-rate charge-discharge characteristics of a supercapacitor, a double-membrane safety valve is more safe and battery performance is better.

Description

technical field [0001] The invention relates to a lead-acid storage battery, in particular to a high-power, high-rate discharge wound lead-acid super storage battery, which belongs to the technical field of storage battery processing and manufacturing. Background technique [0002] At present, most of the traditional winding lead-acid batteries use single or multiple tabs as the current collection method. During the discharge process, the current distribution is uneven, and it is difficult to realize high-current charge and discharge. In addition, when charging and discharging with high current, due to the large internal resistance of the battery, it will cause serious heating and the battery temperature is too high, which will cause safety hazards; The performance of charging and discharging is not good; the explosion-proof membrane of the general battery safety valve is a single-membrane structure. Once the membrane is corroded by acid, the safety valve will lose its prot...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects of low current conduction capacity, high internal resistance, uneven current distribution during charging and discharging of the existing wound lead-acid batteries, and poor performance in applications requiring high-rate charging and discharging; safety The explosion-proof membrane of the valve is a single-membrane structure, which is easy to cause safety accidents and has disadvantages such as low strength and difficult processing of lead foil as the grid material of the winding structure battery. Wound battery, which can make the current distribution even during the charging and discharging process, effectively impr...

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