Large-capacity nickel-hydrogen square battery with low internal resistance

Abstract

The invention provides a large-capacity nickel-hydrogen square battery with low internal resistance. The large-capacity nickel-hydrogen square battery comprises a shell containing electrolyte, and a plurality of positive plates and a plurality of negative plates which are soaked in the electrolyte, wherein the peripheral edges of each positive plate and negative plate are respectively provided with a flow guiding body; the positive plates and the negative plates are arranged at intervals; and the adjacent electrode plates are separated by an insulated diaphragm; the flow guiding body on the positive plate is connected with a positive post assembly; and the flow guiding body on the negative plate is connected with a negative post assembly; the large-capacity nickel-hydrogen square battery with low internal resistance is characterized in that each positive plate is less than 0.4 mm thick, each negative plate is less than 0.25mm thick, and the positive post assembly is as thick as the negative post assembly; the long sides of each positive plate and each negative plate are respectively provided with the flow guiding body, or the length of the flow guiding body is not smaller than one half of the perimeter of each positive plate or each negative plate. The large-capacity nickel-hydrogen square battery with low internal resistance has small charge diffusion resistance in a charging process, reduces the voltage, and is not easy to generate gassing; moreover, the thickness of the electrode plate is reduced to lead deep active substance timely participate in a chemical reaction, so that the internal resistance of the battery is reduced.

Description

technical field [0001] The invention provides a nickel-metal hydride square battery with large capacity and low internal resistance, which belongs to the technical field of battery power supply. technical background [0002] The high-capacity power nickel-metal hydride battery (or capacitor battery) used in electric buses requires fast charging speed and long service life. At present, electric buses use Ni-MH prismatic batteries with a power of more than 100Ah. Both the positive plate and the negative plate are rectangular in structure. Lower the height, easy to produce gassing. In addition, since the thickness of each positive plate is greater than 0.5 mm and the thickness of each negative plate is greater than 0.28 mm, the active material in the deep layer cannot participate in the chemical reaction in time. Contents of the invention [0003] The object of the present invention is to provide a nickel-metal hydride square battery with large capacity and low internal res...

AI Technical Summary

Problems solved by technology

At present, electric buses use Ni-MH prismatic batteries with a power of more than 100Ah. Both the positive plate and the negative plate are rectangular in structure. Lower height, prone to gassing

In addition, since the thickness of each positive plate is greater than 0.5 mm and the thickness of each negative plate is greater than 0.28 mm, the active material in the deep layer cannot participate in the chemical reaction in time.

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