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Method for enhancing density of ribs of gravity casting positive grid

A gravity casting, positive plate technology, applied in the direction of electrode carrier/current collector, etc., can solve the problems of poor acid corrosion resistance, insufficient dense structure of grid conductive ribs, etc. The effect of floating charge service life

Pending Publication Date: 2022-03-22
广东奥克莱集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the gravity casting, the structure of the conductive ribs of the grid is not dense enough, and the acid corrosion resistance is relatively poor; while the corrosion resistance of the positive grid ribs is a key factor related to the length of the battery float charge life;

Method used

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  • Method for enhancing density of ribs of gravity casting positive grid
  • Method for enhancing density of ribs of gravity casting positive grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for increasing the density of gravity cast positive pole grid ribs, comprising the steps of:

[0026] S1: prepare lead alloy, and make the grid semi-finished product through conventional lead alloy gravity casting, and control the thickness of the transverse rib 4, longitudinal rib 3 and outer frame 1 of the grid during casting;

[0027] S2: Cutting with a cutter, cutting off the drool material on the semi-finished grid made by gravity casting on the casting machine;

[0028] S3: The grid uses a stamping die to simultaneously stamp the longitudinal and transverse ribs and the outer frame of the grid into a prismatic cross-sectional structure on the stamping equipment; finally, the overall stamping forms the finished grid.

[0029] With this embodiment, after the gravity casting is formed, the grid is stamped as a whole, which improves the density of the grid alloy, improves the corrosion resistance, and prolongs the battery life. Ensure that the thickness of e...

Embodiment 2

[0031] A method for increasing the density of gravity cast positive pole grid ribs, comprising the steps of:

[0032] S1: prepare lead alloy, and make the grid semi-finished product through conventional lead alloy gravity casting, and control the thickness of the transverse rib 4, longitudinal rib 3 and outer frame 1 of the grid during casting;

[0033] S2: Cutting with a cutter, cutting off the drool material on the semi-finished grid made by gravity casting on the casting machine;

[0034] S3: The grid uses a stamping die to simultaneously stamp the longitudinal and transverse ribs and the outer frame of the grid into a prismatic cross-sectional structure on the stamping equipment; finally, the overall stamping forms the finished grid.

[0035] Wherein, the specific steps of forming the finished grid by integral stamping are: making a set of stamping dies on the stamping equipment at the tail end of the casting machine; engraving grooves with the same shape as the positive g...

Embodiment 3

[0039] A method for increasing the density of gravity cast positive pole grid ribs, comprising the steps of:

[0040] S1: Prepare lead alloy, and make the grid semi-finished product through conventional lead alloy gravity casting, and control the thickness of the transverse rib, longitudinal rib and outer frame of the grid during casting;

[0041] S2: Cutting with a cutter, cutting off the drool material on the semi-finished grid made by gravity casting on the casting machine;

[0042] S3: The grid uses a stamping die to simultaneously stamp the longitudinal and transverse ribs and the outer frame of the grid into a prismatic cross-sectional structure on the stamping equipment; finally, the overall stamping forms the finished grid;

[0043] In the S3 step of the present invention, the longitudinal and transverse ribs and the outer frame of the grid are simultaneously stamped into a prismatic cross-sectional structure on the stamping equipment by using a stamping die; The thic...

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Abstract

The invention specifically discloses a method for enhancing the density of ribs of a gravity casting positive grid, which comprises the following steps: S1, preparing a lead alloy, preparing a grid semi-finished product through conventional lead alloy gravity casting, and controlling the thicknesses of transverse ribs, longitudinal ribs and an outer frame of the grid to be consistent during casting; s2, cutting by a cutter, namely cutting off saliva materials of a grid semi-finished product manufactured by gravity casting on a plate casting machine; and S3, integrally stamping the semi-finished grid product to form a finished grid product, and simultaneously stamping longitudinal and transverse ribs and an outer frame of the grid into a prismatic section structure on stamping equipment by adopting a stamping die. According to the invention, the problems of insufficient strong acid corrosion resistance and short floating charge service life of the current valve-controlled battery gravity casting positive plate grid are solved; on the premise of reducing the weight of the positive grid, the density of the conductive ribs is improved, the corrosion resistance is enhanced, and the floating charge service life of the valve-controlled battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of accumulators, in particular to a method for increasing the density of gravity-cast positive electrode grid ribs. Background technique [0002] At present, in all countries in the world, companies that produce lead-acid batteries have the following manufacturing methods for their grids. The first is to pull the net, melt the lead and pour it into a groove mold to form a strip, and then press and tie it into a certain width. , thickness of the lead belt, formed grid after drawing or expanding the net; the second is stamping, the first half of the process is the same as drawing the net, and the lead belt behind is punched to form the grid; the first two are mainly used for starting type The third is die-casting, in which the molten lead liquid is pumped into a mold with a certain cavity to form a grid; the fourth is gravity casting, which, as the name implies, relies on the gravity of the lead liquid to flow...

Claims

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Application Information

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IPC IPC(8): B22D25/04B21D22/02H01M4/73
CPCB22D25/04B21D22/02H01M4/73Y02E60/10
Inventor 张永江邵双喜
Owner 广东奥克莱集团有限公司
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