Method for appraising sphere nickel median voltage performance
A spherical nickel and voltage technology, which is applied in the field of evaluating the median voltage performance of spherical nickel, can solve problems such as long cycle time, achieve the effects of reducing production costs, shortening judgment time, and saving manpower and material resources
Inactive Publication Date: 2010-08-25
BYD CO LTD
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The purpose of the present invention is to provide a method that can quickly and effectively evaluate the median voltage performance of spherical nickel in order to overcome the shortcoming of the long cycle of the existing spherical nickel median voltage performance evaluation method
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The invention provides a method to appraise the ball nickel median voltage performance of positive material in secondary nickel-hydrogen / nickel-cadmium battery. The method includes: it gets the parameter of ball nickel crystal and sets the parameter field of ball nickel crystal; comparing the ball nickel crystal parameter to the setting ball nickel crystal parameter, if the getting value is in the range of setting value, the median voltage can satisfy the battery. The ball nickel crystal parameter is the ratio of at least two different crystal surface diffraction maximums. The method in invention can determine if the ball nickel median voltage good or bad quickly, it is especially proper for appraising the ball nickel material of factory.
Description
technical field The invention relates to a method for evaluating the median voltage performance of spherical nickel, in particular to a method for evaluating the median voltage performance of spherical nickel used as the positive electrode material of a secondary nickel-hydrogen / nickel-cadmium battery. Background technique Spherical nickel (that is, spherical nickel hydroxide, usually with a β-crystal structure) is the main positive electrode active material used in secondary nickel-metal hydride / nickel-cadmium batteries, and its electrochemical performance directly determines or indirectly affects the electrochemical performance of the battery. Electrochemical properties such as specific capacity, cycle life, median voltage, fast charge and discharge capacity, self-discharge performance, and storage performance. For manufacturers of secondary NiMH / NiCd batteries, it is very important to accurately understand and correctly evaluate the median voltage performance of spherica...
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IPC IPC(8): G01R31/36G01R31/00
Inventor 李永胜
Owner BYD CO LTD
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