A kind of ultra-low self-discharge nickel-metal hydride battery and its electrode manufacturing method

A nickel-metal hydride battery and self-discharge technology, which is applied in the manufacture of battery electrodes, nickel storage batteries, and alkaline storage batteries, etc., can solve the problems of shortening the normal service life of nickel-hydrogen batteries, loss of nickel-hydrogen battery power, and battery capacity loss, etc. Excellent recovery performance, prolonging normal service life and low production cost

Active Publication Date: 2020-05-15
东莞市朗泰通实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the battery has been idle and not used, it will also lose power. This phenomenon is called the self-discharge phenomenon of the battery. The main reason for self-discharge is that an irreversible reaction occurs inside the battery, resulting in a loss of battery capacity.
When the Ni-MH battery is put on hold for use, the self-discharge phenomenon will consume the electric energy of the Ni-MH battery and waste electric energy resources, which is not in line with the advocacy of low-carbon and environmental protection in today's society. Charging, which will shorten the normal service life of Ni-MH batteries, resulting in unnecessary waste of resources

Method used

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  • A kind of ultra-low self-discharge nickel-metal hydride battery and its electrode manufacturing method
  • A kind of ultra-low self-discharge nickel-metal hydride battery and its electrode manufacturing method
  • A kind of ultra-low self-discharge nickel-metal hydride battery and its electrode manufacturing method

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Experimental program
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Embodiment 1

[0030] Embodiment 1, an ultra-low self-discharge nickel-metal hydride battery, including a battery case, a battery cell and an electrolyte, the battery cell includes a positive electrode sheet and a negative electrode sheet, the positive electrode sheet includes a positive electrode substrate, and each surface of the positive electrode substrate is fixed with cobalt-coated Spherical nickel layer, cobalt in cobalt-coated spherical nickel is trivalent cobalt; the negative electrode sheet includes a negative electrode substrate, each surface of the negative electrode substrate is fixed with a negative electrode coating layer, and the general formula of the alloy powder in the negative electrode coating layer is La 0.53 PR 0.87 Nd 0.99 x 0.61 Ni 8.44 A 0.56 X is Mg, Ce and Sm, and the mass percentages of each element Mg, Ce, Sm in X are 79.12%, 0.51%, 20.37% respectively; A is Al, Fe, Co and Zr, and each element Al, Fe, Co, The mass percentages of Zr in A are 94.8%, 1.46%, 0.8...

Embodiment 2

[0031] Embodiment 2, an ultra-low self-discharge nickel-metal hydride battery, including a battery case, a battery cell and an electrolyte, the battery cell includes a positive electrode sheet and a negative electrode sheet, the positive electrode sheet includes a positive electrode substrate, and each surface of the positive electrode substrate is fixed with cobalt-coated Spherical nickel layer, cobalt in cobalt-coated spherical nickel is trivalent cobalt; the negative electrode sheet includes a negative electrode substrate, each surface of the negative electrode substrate is fixed with a negative electrode coating layer, and the general formula of the alloy powder in the negative electrode coating layer is La 0.57 PR 0.83 Nd 0.92 x 0.68 Ni 8.12 A 0.88 X is Mg, Ce and Sm, and the mass percentages of each element Mg, Ce, Sm in X are 76.52%, 0.78%, 22.7% respectively; A is Al, Fe, Co and Zr, and each element Al, Fe, Co, The mass percentages of Zr in A are 93.71%, 2.1%, 0.59...

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Abstract

The present invention provides a kind of ultra-low self-discharge nickel-metal hydride battery, comprising positive electrode sheet and negative electrode sheet, each surface of positive electrode substrate is fixed with cobalt-coated ball nickel layer; The general formula of alloy powder in the negative electrode coating layer of negative electrode substrate is: La x PR y Nd z x (3‑x‑y‑z) Ni a A (9‑a) , X is at least one element of Mg, Ca, Ce, Sm, A is at least one element of Al, Mn, Fe, Co, Cu, Zn, Zr, 0.5≤x≤0.58, 0.82≤y≤0.95 , 0.92≤z≤1.2, 7.9≤a≤8.6. The invention also discloses a method for making the electrode of the ultra-low self-discharge nickel-hydrogen battery. The invention can effectively reduce the occurrence of self-discharge phenomenon, can keep more electric energy even after long-term storage for use, has excellent capacity recovery performance, can prolong the normal service life of the nickel-hydrogen battery, and meanwhile the prepared nickel-hydrogen battery has high stability.

Description

technical field [0001] The invention relates to a manufacturing method of a battery and an electrode thereof, and specifically discloses a manufacturing method of an ultra-low self-discharge nickel-hydrogen battery and an electrode thereof. Background technique [0002] Ni-MH batteries are made of two main materials, hydrogen storage alloy and spherical nickel hydroxide, with good performance, strong reliability, safety and pollution-free, good low temperature performance, fast charge and discharge, high discharge rate, long service life, etc. Excellent performance, the discharge capacity is 1.5 to 2 times that of nickel-cadmium batteries, and it has no pollution to the environment. [0003] If the battery has been idle and not used, it will also lose power. This phenomenon is called the self-discharge phenomenon of the battery. The main reason for self-discharge is that an irreversible reaction occurs inside the battery, resulting in a loss of battery capacity. When the Ni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/30H01M10/28H01M4/1395H01M4/38
CPCH01M4/1395H01M4/38H01M10/28H01M10/30Y02E60/10Y02P70/50
Inventor 邓志荣李兴松祝东贵黄志明何潇
Owner 东莞市朗泰通实业有限公司
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