Method for detecting capacity of single polar plate of storage battery

Abstract

The invention discloses a method for detecting the capacity of a single polar plate of a storage battery. The comprises the following steps of: connecting a positive tab of the storage battery with the output end of a first constant value resistor, and connecting each negative tab with the input end of a second fixed-value resistor; connecting a positive electrode output line of a storage battery charging and discharging machine to the input end of the first constant value resistor, and connecting a negative electrode output line of the storage battery charging and discharging machine to the output end of the second constant value resistor; starting a discharging mode of the storage battery charging and discharging machine , and starting a voltage acquisition device to detect the voltage on the first and second constant value resistors; and calculating the discharge current according to the voltage and the constant resistance, and obtaining the capacity of the single polar plateaccording to the discharge current and the discharge time. By detecting the capacity of the single-grid polar plate in the storage battery, the deviation of the thickness, the weight and the like of the single polar plate is comprehensively judged, and the measurement precision is improved.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and in particular relates to a method for detecting the capacity of a single pole plate of a battery. Background technique [0002] Existing lead-acid storage batteries usually include a casing, and a plurality of cells are arranged in the casing, and battery clusters are arranged in the cells, thereby forming a single-cell storage battery. Each battery cluster includes a positive plate, a negative plate, and a separator between the positive and negative electrodes, and each battery cluster usually includes 5 negative plates and 4 positive plates (the so-called negative pack positive), or 5 One positive plate and four negative plates (the so-called positive package negative). The positive or negative plate includes the internal grid, the active material (lead paste) coated on the grid, the positive and negative grids are respectively provided with positive and negative tabs that are ...

AI Technical Summary

Problems solved by technology

When the thickness and weight of the plates are not uniform, it is easy to make the compression ratio of each battery cell different. That is to say, when the tentative battery cluster is assembled into a single cell, there will be some looseness and some tightness, which in turn will cause a single cell. The cell pressure is different, and the acid absorption amount of each cell is different, which will cause the concentration of sulfuric acid between the plates to be unbalanced, which will bring difficulties to the balance of the cell voltage.

[0004] It is understandable that it is very difficult and cumbersome to detect whether the parameters such as weight and thickness of the plates are uniform, so that human-friendly design requirements are very difficult and cumbersome, especially for batteries that have been assembled, it is necessary to completely disassemble the outer shell and take out The detection of the polar plate not only has a large workload, but also the thickness of each point of the polar plate will have errors, which will affect the measurement accuracy

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