Composite separator for horizontal lead-acid battery, horizontal lead-acid battery comprising same and assembling method of horizontal lead-acid battery

Abstract

The invention provides a composite separator for a horizontal lead-acid battery. The separator is of a strip-shaped structure composed of an elastic parent body and an insert wrapped in the elastic parent body, the height of the strip-shaped structure is equal to the distance between horizontal lead-acid battery polar plates, and the upper end and/or the lower end of the strip-shaped structure are/is provided with glue containing grooves/glue containing grooves which are/is through in the left-right direction and used for containing sealant. The elastic parent body is an elastic material withthe elasticity modulus being 5-50 MPa, and the insert is an acid-resistant rigid material with the elasticity modulus being larger than or equal to 200 MPa. The invention also provides a horizontal lead-acid battery comprising the composite separator and an assembling method of the horizontal lead-acid battery. The insert provides rigidity, and deformation and instability of the insert during assembly and compression are prevented; the lead wire can pass through the elastic parent body and the sealant filled in the sealant accommodating groove in a lossless manner, so that gas and liquid amongdifferent cells are isolated, efficient sealing among the cells of the horizontal lead-acid battery is realized, and the comprehensive performance of the horizontal lead-acid battery is effectively improved.

Description

【Technical field】 [0001] The invention relates to the field of storage batteries, in particular to a composite separator for a horizontal lead-acid battery, a horizontal lead-acid battery containing the composite separator and an assembly method thereof. 【Background technique】 [0002] Lead-acid batteries began in 1859 with Gaston Plante's research on the charging and discharging of Pb electrodes in 10wt% sulfuric acid solution. In 1881, Camille Faure coated the lead paste made of red lead, sulfuric acid and water on the lead plate as an electrode, and Ernest Volckmar changed the lead plate into a lead grid. These two technologies alleviate the softening and falling off of the lead paste of the positive and negative electrodes of the lead-acid battery, and effectively increase the capacity of the lead-acid battery. The structure of the lead-acid battery is thus basically formed and mature. After more than 150 years of research and improvement, lead-acid batteries have been...

AI Technical Summary

Problems solved by technology

[0005] However, although this kind of horizontal lead-acid battery solves the phenomenon of electrolyte stratification, and has small internal resistance and light weight, the series connection between the cells is directly realized by the lead wire connected to the bipolar plate without welding (traditional cell series connection, first The welded positive terminal of the previous unit and the welded negative terminal of the next unit are integrated by welding to realize the series connection of adjacent cells), but there is another inherent Fatal defect: Bleeding liquid or gas is very easy to occur between different cells (fluid leakage refers to the communication of electrolyte between different cells, causing a short circuit between cells; gas leakage refers to the gas of a certain cell, especially positive oxygen, It should be combined with sponge lead at the negative electrode to form lead oxide, then the lead oxide reacts with sulfuric acid to form lead sulfate, and the lead sulfate is recharged and reduced to lead, thereby avoiding the loss of water in the cell, but if the cells are not completely sealed, then Oxygen produced by this cell will move to the adjacent cell, thereby causing the dehydration of the cell, and at the same time, causing the negative electrode of the adjacent cell to discharge), resulting in increased self-discharge of the battery, increased corrosion of the lead wire, and consistent grouping Poor performance, which greatly affects the service life of the battery, which is also the primary factor limiting the application of lead-acid batteries

However, the horizontal lead-acid battery requires a large assembly pressure during the assembly process. The structures of the above-mentioned separators are easily deformed and unstable, and cannot be completely sealed, eventually leading to failure.

Images