Steel shell of alkaline zinc-manganese battery and alkaline zinc-manganese battery
A zinc-manganese battery and steel shell technology, applied in the field of electrochemistry, can solve problems such as increased contact internal resistance and affecting battery discharge performance
Inactive Publication Date: 2019-12-17
FUJIAN NANPING NANFU BATTERY
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Problems solved by technology
[0003] After the battery is stored for a long time, the nickel coating of the steel case of the battery is in the lye for a long time, and part of it is oxidized by KOH, which leads to an increase in the contact internal resistance between the positive electrode ring and the steel case, which affects the discharge performance of the battery.
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[0026] The present invention will be described below with reference to specific embodiments. It should be noted that these embodiments are only illustrative and do not limit the present invention in any way.
[0027] The basic structure of the batteries of Examples 1-4 is the same as that of ordinary alkaline zinc-manganese batteries, but the coating on the inner surface of the steel shell is the first cobalt-nickel coating. The thickness of the first nickel-cobalt coating is about 0.20 microns, and the thickness of the first nickel-cobalt coating gradually increases to about 1.2 microns from the inner top to the flaring part, wherein the proportion of cobalt in the first nickel-cobalt coating is shown in Table 1.
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Abstract
The invention provides a steel shell of an alkaline zinc-manganese battery and the alkaline zinc-manganese battery. A first nickel-cobalt plating layer is formed on the inner surface of the steel shell, the first nickel-cobalt plating layer is a mixed plating layer containing nickel and cobalt, and the molar percentage content of cobalt in the first nickel-cobalt plating layer is 10%-50%. And lowcontact internal resistance exists between the steel shell and a positive electrode ring, so that the internal resistance of the battery is reduced, and the discharge performance of the battery afterlong-term storage is improved.
Description
technical field [0001] The invention belongs to the field of electrochemistry, in particular, the invention relates to a steel shell of an alkaline zinc-manganese battery and the alkaline zinc-manganese battery. Background technique [0002] Batteries, such as alkaline zinc-manganese batteries, are commonly used as a means of energy storage. Generally speaking, an alkaline battery includes a steel case, a positive electrode, a negative electrode, a separator, and an electrolyte. The steel shell is not only a container for chemically active substances, but also serves as a positive current collector. The steel shell is punched out of steel, and then coated with a layer of nickel to prevent iron from being corroded by KOH solution when it is exposed to lye for a long time. In addition, in order to further reduce the contact internal resistance between the steel shell and the positive electrode ring, a layer of conductive graphite emulsion is usually sprayed on the inner surfa...
Claims
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IPC IPC(8): H01M2/02H01M6/06
CPCH01M6/06H01M50/116H01M50/124
Inventor 常海涛薛祥峰林建兴涂志晖徐燕婷
Owner FUJIAN NANPING NANFU BATTERY