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Method for manufacturing supporting body special for coiled square battery

A prismatic battery and manufacturing method technology, applied in secondary battery manufacturing, alkaline battery manufacturing, primary battery, etc., can solve the problems of shortened battery life, loose winding of battery cores, increased internal resistance of batteries, etc., and achieve recycling The effect of life improvement, improvement of compressive strength performance, and improvement of discharge specific capacity

Inactive Publication Date: 2012-07-25
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, batteries manufactured in this way pose a series of problems
First, the winding of the battery cell must be loose, and the contact between the positive and negative electrodes is not tight enough, resulting in an increase in the internal resistance of the battery and a decrease in the current efficiency of the battery; second, due to the expansion and activity of the electrode material after wetting. The material will fall off, which will directly reduce the capacity of the battery; third, due to the expansion of the electrode and the falling off of the active material, it may also cause a micro-short circuit or a direct short circuit inside the battery, which will shorten the service life of the battery rapidly; During use, vibration and bumps may aggravate the loosening of the battery core, increase in internal resistance, shedding of active materials, and low short-circuit compressive strength.

Method used

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  • Method for manufacturing supporting body special for coiled square battery
  • Method for manufacturing supporting body special for coiled square battery
  • Method for manufacturing supporting body special for coiled square battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for manufacturing a special support for a wound square battery, which is manufactured according to the following methods and steps:

[0026] The first step is to mix the inorganic powder mixture of silicate, alumina and light ceramic powder powder in equal mass ratio with the epoxy resin and organic silicon adhesive mixture in equal mass ratio, according to the mass ratio of 100:1 Mix, ball mill for 10 minutes to mix evenly;

[0027] The second step is to place the above-mentioned uniformly mixed mixture in a square mold with a rectangular metal mesh placed in the center and with upper and lower double pistons ( figure 1 ), tapping, preloading;

[0028] The third step, at 0.5MPa / cm 2 Under the pressure condition of, press the upper piston of the mold to a predetermined height (depending on the application and different types of batteries) and hold for 10 seconds to obtain a special support for the square battery ( figure 2 , image 3 ).

[0029] The special support f...

Embodiment 2

[0031] A method for manufacturing a special support for a wound square battery, which is manufactured according to the following methods and steps:

[0032] In the first step, the silicate and epoxy resin adhesive are mixed according to a mass ratio of 100:5, and ball milled for 180 minutes to mix evenly;

[0033] The second step is to place the above-mentioned uniformly mixed mixture in a square mold with a rectangular metal mesh placed in the center and with upper and lower double pistons ( figure 1 ), tapping, preloading;

[0034] The third step, at 1.5MPa / cm 2 Under the pressure condition of, press the upper piston of the mold to a predetermined height (depending on the application and different types of batteries) and hold for 180 seconds to obtain a special support for the square battery ( figure 2 , image 3 ).

[0035] The special support for prismatic batteries of this example was used to manufacture the wound prismatic nickel-hydrogen test battery. The specific discharge ca...

Embodiment 3

[0037] A method for manufacturing a special support for a wound square battery, which is manufactured according to the following methods and steps:

[0038] In the first step, the light ceramic powder and the silicone adhesive are mixed according to the mass ratio of 100:2, and the mixture is uniformly mixed by ball milling for 30 minutes;

[0039] The second step is to place the above-mentioned uniformly mixed mixture in a square mold with a rectangular metal mesh placed in the center and with upper and lower double pistons ( figure 1 ), tapping, preloading;

[0040] The third step, at 1.0MPa / cm 2 Under the pressure condition of, press the upper piston of the mold down to a predetermined height (depending on the application and different types of batteries) and hold for 120 seconds to obtain a special support for square batteries ( figure 2 , image 3 ).

[0041] The special support for the prismatic battery of this embodiment was used to manufacture a wound prismatic nickel-hydroge...

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Abstract

The invention discloses a method for manufacturing a supporting body special for a coiled square battery. The method comprises the following steps of: firstly, mixing inorganic non-conducting material powder and an adhesive in a mass ratio of 100:1-5 and performing ball milling on the mixture for 10 to 180 minutes for uniformly mixing; secondly, putting the uniformly-mixed mixture into a square mold which is provided with a rectangular metal net in the center and upper and lower pistons, compacting and pre-pressing the mixture; and thirdly, pressing the upper piston of the mold downwards to apreset height under the pressure of between 0.5 and 3 MPa / cm2 and keeping the upper piston for 10 to 180 seconds to obtain the supporting body special for the coiled square battery. A square body made from the inorganic non-conducting material comprises silicate or aluminum oxide or light ceramic powder. The adhesive is an epoxy resin or an organic silicon adhesive. The metal net is a nickel-plated steel net or a stainless steel net. The method is easy to realize and simple and convenient to operate, and has the advantages of effectively solving the problems of electric core looseness, activesubstance falling and short circuit existing in a produced coiled square battery, improving pressure resistance and shock resistance of the battery and prolonging the service life of the battery.

Description

technical field [0001] The invention relates to the field of battery manufacturing, in particular to a method for manufacturing a special support body for wound-type prismatic batteries, which can be used to manufacture various types of primary and secondary wound-type prismatic batteries. Background technique [0002] At present, the manufacture of wound-type prismatic battery cells produced by existing industries is generally wound from top to bottom or from inside to outside in the order of positive electrode, separator, and negative electrode. Moreover, after the battery core is wound, there will be a square gap of a certain size in the center of the battery core to facilitate the injection of electrolyte, so that the electrolyte can wet the entire battery core in time after injection. However, batteries made in this way pose a series of problems. First, the winding of the battery cell must be loose, and the contact between the positive and negative electrodes is not ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M6/00H01M10/28
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 沈萌周环波程凡林丽陈艳艳刘圆圆詹炳然詹金俊
Owner STATE GRID CORP OF CHINA