Quasi-two-pole winding-structure lead-acid battery and making method

Abstract

Positive active material and negative active material separated by lead wires are coated on two sides of composite slab lattice so as to constitute bipolar plate. The said lead wires can be cut into certainshape to become positive pole plate or negative pole plate with single pole. Single adjacent batteries separated by lead wires can be connected in series. Positive pole plate, diaphragm, and negative pole plate of single battery are winded on same core axle. Winded pole plates and diaphragm fixed by plastic fixture becomes battery core. Dried battery core is installed inside cylindrical battery box so as to complete electrochemical procedure. Then, firming agent is filled into the box. The invention combines advantages of both of quasi-bipolar battery and cylindrical winded battery, possessing features of low internal resistance, high specific energy, high specific power, and long service life.

Description

Technical field: [0001] The invention relates to a lead-acid storage battery and a manufacturing method thereof, in particular to a lead-acid storage battery with a quasi-bipolar winding structure and a manufacturing method thereof. Background technique: [0002] Lead-acid batteries are currently widely used in various fields of the national economy. The existing more advanced lead-acid batteries are horizontal batteries and wound cylindrical batteries, both of which have unique structures. The pole horizontal structure, the series connection of the battery is directly realized by the lead wire of the bipolar plate, and the winding cylindrical battery adopts the expanded mesh grid, and the series connection is realized by external welding after being wound into a single battery. [0003] The wound cylindrical battery published in patent 98202241.7 adopts expanded mesh grid. The wound cylindrical structure adopted in this patent greatly enhances the anti-deformation and anti-...

AI Technical Summary

Problems solved by technology

[0003] The wound cylindrical battery published in patent 98202241.7 adopts expanded mesh grid. The wound cylindrical structure adopted in this patent greatly enhances the anti-deformation and anti-vibration ability of the plate, avoids the short circuit caused by the falling off of the active material, and adopts a cylindrical shell. The strength of the battery box is greatly improved, the opening pressure of the vent valve can be increased to 10 times that of the traditional battery, and the water loss is greatly reduced, so the life is extremely high, which is 3-5 times that of the traditional battery. However, because the positive and negative terminals are on the same end face, The tab distribution of the positive and negative electrodes must be strictly controlled in different fan-shaped areas; and the capacity of each layer is inconsistent, resulting in uneven current distribution in each layer, inconsistent currents for each tab, and tabs that withstand large currents are prone to corrosion and fracture, resulting in The battery fails prematurely, and this phenomenon is more obvious when the number of winding layers is large, so the method described in this patent is only suitable for small and medium capacity batteries, not for large capacity batteries; at the same time, because the series connection of single batteries is still limited to traditional The external welding method reduces the reliability of the battery

[0004] There is also a relatively advanced horizontal battery, which adopts a lead mesh grid and a horizontal quasi-bipolar structure without tabs and connecting bars. The series connection of single batteries is directly realized by the lead wire of the bipolar plate, and each single battery has pressure The frame is fixed, high reliability, low internal resistance, anti-vibration, and high-current charging and discharging performance are excellent, but limited to the structure of the battery box, the opening pressure of the vent valve is low, and the battery life is not as good as that of the wound cylindrical battery. In addition, the battery is placed , the plate must be level, otherwise it will reduce the performance of the battery

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