Method for inhibiting generation of pores of plate grid of valve-controlled accumulator, and plate grid mould

A battery and suppression valve technology, applied in the field of suppressing the formation of valve-controlled battery grids and battery grids, can solve the problems of high technical requirements in grid production, difficult implementation by battery manufacturers, and high production costs, so as to reduce product loss. efficiency and waste of resources, increase the rate of qualified products, and save capital costs

Active Publication Date: 2011-09-14
FENGFAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can better solve the problem of grid casting air bubbles, it is not easy to implement in general battery manufacturers due to high technical requirements and high production costs in mold manufacturing and grid production, so it has not been widely used in battery enterprises

Method used

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  • Method for inhibiting generation of pores of plate grid of valve-controlled accumulator, and plate grid mould
  • Method for inhibiting generation of pores of plate grid of valve-controlled accumulator, and plate grid mould
  • Method for inhibiting generation of pores of plate grid of valve-controlled accumulator, and plate grid mould

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Melt the grid raw material lead-calcium-tin-aluminum alloy (1# lead alloy) at a melting temperature of 480°C; heat the grid mold to 180°C; take 30 g of cork powder and 10% of sodium silicate in parts by mass. g, 5 g of bentonite, 1000 g of water to prepare a release agent, wherein the density of sodium silicate is 1.250g / cm3, the cork powder is passed through a 200 mesh sieve, and the bentonite is passed through a 160 mesh sieve; the prepared release agent is evenly sprayed in the mold cavity; the liquid lead-calcium-tin-aluminum alloy is cast in the grid mold, and the mold is released after the alloy is solidified and cooled.

Embodiment 2

[0030] Example 2: Melt the grid raw material lead-calcium-tin-aluminum alloy (1# lead alloy) at a melting temperature of 500°C; heat the grid mold to 230°C; take 35 g of cork powder and sodium silicate 15 g, 5 g of bentonite, 1000 g of water to prepare a release agent, wherein the density of sodium silicate is 1.250 g / cm3, the cork powder is passed through a 200 mesh sieve, and the bentonite is passed through a 160 mesh sieve; the prepared release agent is evenly sprayed on the mold Inner cavity: Cast the liquid lead-calcium-tin-aluminum alloy in the grid mold, and release the mold after the alloy is solidified and cooled.

Embodiment 3

[0031] Example 3: Melt the grid raw material lead-calcium-tin-aluminum alloy (1# lead alloy) at a melting temperature of 510°C; heat the grid mold to 210°C; take 33 g of cork powder and sodium silicate in parts by mass 18 g, 5 g of bentonite, 1000 g of water to prepare a release agent, wherein the density of sodium silicate is 1.250 g / cm3, the cork powder is passed through a 200 mesh sieve, and the bentonite is passed through a 160 mesh sieve; the prepared release agent is evenly sprayed on the mold Inner cavity: Cast the liquid lead-calcium-tin-aluminum alloy in the grid mold, and release the mold after the alloy is solidified and cooled.

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Abstract

The invention relates to a method for inhibiting the generation of pores of a plate grid of a valve-controlled accumulator, and a plate grid mould, solving the problems of pore generation of the plate grid of the valve-controlled accumulator. The method comprises the following steps of: a, fusing raw materials, i.e. lead-calcium-stannum-aluminum alloys, of the plate grid at the temperature of 480-510 DEG C; b, heating the plate grid mould at the temperature of 180-230 DEG C; c, preparing a mould release agent from 30-35 parts by weight of cork powder, 10-18 parts by weight of sodium silicate,5 parts by weight of bentonite and 1000 parts by weight of water, and spraying the plate grid mould; and d, pouring the lead-calcium-stannum-aluminum alloys. With the method, the structure of the plate grid mould is improved, an air passage is additionally arranged, a sprue gate is enlarged, the radius R of a circular arc positioned on the transition round corner part of the plate grid is reduced, and the like; and in addition, quality tracking shows that the method can be used for effectively inhibiting the generation of the pores of the plate grid of the valve-controlled accumulator on the basis of no increase of the production cost and the manufacturing difficulty of the plate grid mould, enhancing the qualification rate of products by 1-2 percentage points and reducing the percentage point of the products and the waste of resources, thereby saving the fund cost for enterprises.

Description

technical field [0001] The invention relates to battery grid technology, in particular to a method for suppressing the generation of valve-controlled battery grid pores and a grid mold, belonging to the technical field of storage batteries. Background technique [0002] The grid is the key component of the valve-regulated lead-acid battery, and it is responsible for supporting the active material and transmitting the current in the battery. The grid used by the valve-regulated battery is thicker, generally 2 to 3 times that of the starter battery. The grid material of VRLA is lead-calcium-tin-aluminum alloy. This alloy material has poor casting performance, poor fluidity, and narrow molding area. The gas is not easy to discharge in the mold cavity during casting, and it is easy to cause inclusions in the grid during forming. Air bubbles form pores. During use, the sulfuric acid electrolyte easily enters the deep layer of the grid through the pores, which accelerates the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D25/04B22D19/04
Inventor 刘建楼牛冀辉王丽斋崔鹏飞
Owner FENGFAN
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