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Electromagnetic low-pressure casting device and method for lead-acid battery grid

A low-pressure casting and lead-acid battery technology, which is applied in the field of lead-acid battery grid preparation, can solve the problems of microsegregation of solidified structure and compound inclusions, affecting the service life of lead-acid batteries, and the decline of grid corrosion resistance. Excellent crystalline structure, disappearance of shrinkage and shrinkage cavity defects, and the effect of reducing micro-segregation

Active Publication Date: 2021-09-21
广西鑫锋电源科技有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is relatively simple and the production efficiency is high (≤16 pieces / min). However, due to the serious shortage of shrinkage during the solidification process of the grid, there are serious shrinkage and shrinkage defects within a certain thickness range of the upper and lower surface layers of the grid, and some shrinkage porosity The shrinkage cavity extends to the surface of the grid, forming defects similar to surface microcracks
In addition, due to the existence of alloying elements, there are relatively serious microsegregation and compound inclusions in the solidified structure.
The above solidification defects will lead to a decrease in the corrosion resistance of the grid, which will seriously affect the service life of the lead-acid battery

Method used

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  • Electromagnetic low-pressure casting device and method for lead-acid battery grid
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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the ...

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Abstract

The invention discloses an electromagnetic low-pressure casting device and method for a lead-acid battery grid. The electromagnetic low-pressure casting device comprises a grid casting mold and a heat preservation furnace arranged at the bottom of the grid casting mold, a mold cavity of the grid casting mold communicates with the heat preservation furnace through a liquid rising pipe, the bottom of the liquid rising pipe is located below the liquid level of molten lead in the heat preservation furnace, a pressurizing system is used for pressing the molten lead in the heat preservation furnace into the mold cavity through the liquid rising pipe, and a magnetic field generating device is used for applying an electromagnetic field to the molten lead in the mold cavity. According to the electromagnetic low-pressure casting device and method for the lead-acid battery grid, the electromagnetic field is applied in the low-pressure casting process of the grid, and the corrosion resistance of the grid is further improved through the grain refinement effect and the segregation reduction effect of the electromagnetic field.

Description

technical field [0001] The invention belongs to the technical field of lead-acid battery grid preparation, and in particular relates to an electromagnetic low-pressure casting device and method for a lead-acid battery grid. Background technique [0002] The grid is the main component of the lead-acid battery. It is the current collector skeleton of the electrode, which plays the role of conducting, collecting and making the current evenly distributed. At the same time, it supports the active material and is the carrier of the active material. Due to the shape and size characteristics of the grid, and considering the production cost, most of the grids are currently produced by ordinary water-cooled metal mold casting. The process simply pours the lead melt into the grooves of an open water-cooled metal mold, and completes the solidification without feeding the lead melt. The process is relatively simple and the production efficiency is high (≤16 pieces / min). However, due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04B22D25/04B22D27/02
CPCB22D18/04B22D25/04B22D27/02Y02E60/10
Inventor 陈刚付发友何浩李益民刘晨周邦红林彬彬王金玉
Owner 广西鑫锋电源科技有限公司
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