A new type of plate grid of continuous casting and rolling of multi-layer structure

Abstract

The utility model relates to a battery field especially relates to a new type of grid of continuous rolling and continuous casting of multilayer structure, provide a new type of grid of continuous rolling and continuous casting of multilayer structure, include: grid body and the pole lug of the one end of grid body, wherein, the grid body includes: core layer and the surface layer of being located in the both sides of core layer, the grid body is along its thickness direction and is set with a plurality of through -hole, the utility model discloses the way of surface layer and core layer combination, solved the traditional homogeneous alloy difficultly balanced mechanical strength, the disadvantage of corrosion resistance and conductivity, can take into account the deformation resistance, corrosion resistance, good conductivity, the honeycomb mesh of regular hexagon makes stress even transmission along the rib axis, eliminates the stress concentration of rectangular mesh right angle place, and forms natural current equalizing network, reduces the risk of local overcharge, the chamfer structure can reduce the risk of stress concentration, and improve the corrosion resistance of rib intersection, enhance current carrying capacity.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a novel multi-layer continuously rolled and cast grid. Background Technology

[0002] As the core structure of a lead-acid battery, the grid's main functions include supporting active materials, conducting current, and establishing the electrode reaction interface. Traditional grids are typically manufactured using a homogeneous alloy of uniform thickness through a stamping process. Increasing the calcium content in the homogeneous alloy strengthens the mechanical structure but reduces conductivity; increasing the tin content improves corrosion resistance but sacrifices mechanical strength and increases cost. Current technology struggles to balance mechanical strength, conductivity, and corrosion resistance under high-temperature conditions. Under high-temperature float charging conditions, the corrosion rate of the grid accelerates, leading to increased internal resistance, capacity decay, and premature battery failure. The mesh of the stamped grid is typically rectangular, with right-angled intersections at the ribs. This structure easily causes current concentration, potentially leading to rib melting during high-current charging and discharging. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a novel multi-layer continuous rolling and casting grating.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A novel multi-layer continuous rolling and casting grid is provided, comprising: a grid body and an electrode lug located at one end of the grid body;

[0006] The plate grid body includes a core layer and surface layers disposed on both sides of the core layer; the plate grid body has a plurality of through holes along its thickness direction.

[0007] Preferably, the four corners of the frame of the grid body are provided with R5 chamfers.

[0008] Preferably, the connection between the electrode tab and the grid body is an R8 chamfer.

[0009] Preferably, the thickness ratio of the core layer to the surface layer is 3:2.

[0010] Preferably, the thickness of the core layer is 0.6 mm.

[0011] Preferably, the surface layer includes a first surface layer and a second surface layer, both of which have a thickness of 0.2 mm.

[0012] Preferably, the through holes on the plate grid body are regular hexagonal through holes with a side length of 10mm; the rib width is 2mm, and the intersection of the ribs is chamfered with R5.

[0013] Preferably, the core layer is made of a first alloy, which is a Pb-0.15%Ca-0.6%Sn alloy.

[0014] Preferably, the surface layer is made of a second alloy, which is a Pb-0.07%Ca-2.5%Sn alloy.

[0015] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0016] This invention solves the problem of traditional homogeneous alloys struggling to balance mechanical strength, conductivity, and corrosion resistance by combining the surface and core layers. It can simultaneously achieve resistance to deformation, corrosion resistance, and good conductivity. The hexagonal honeycomb mesh ensures that stress is evenly distributed along the rib axis, eliminating stress concentration at the right angles of the rectangular mesh and forming a natural current-sharing network, reducing the risk of local overcharging. The chamfered structure further reduces the risk of stress concentration, improves corrosion resistance at rib intersections, and enhances current carrying capacity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the basic structure of a multi-layer continuous rolling and casting novel grid in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the multi-layer structure of the plate grid body in one embodiment of the present invention.

[0019] The reference numerals in the figure include:

[0020] Grid body 1; core layer 11; surface layer 12; tab 2. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0024] Example

[0025] This embodiment provides a novel multi-layer continuous rolling and casting grid, comprising: a grid body 1 and an electrode tab 2 located at one end of the grid body 1;

[0026] The plate grid body 1 includes a core layer 11 and surface layers 12 disposed on both sides of the core layer 11. The core layer 11 is made of a Pb-0.15%Ca-0.6%Sn alloy, and the surface layer 12 is made of a Pb-0.07%Ca-2.5%Sn alloy. The surface layer 12 includes a first surface layer and a second surface layer. The thickness ratio of the core layer 11 to the surface layer 12 is 3:2. Specifically, the thickness of the core layer 11 is 0.6 mm, and the thickness of both the first and second surface layers is 0.2 mm. The four corners of the plate grid body 1 are provided with R5 chamfers.

[0027] The plate grid body 1 has several regular hexagonal through holes along its thickness direction, with a side length of 10mm; the rib width is 2mm, and the intersection of the ribs is chamfered at R5; the connection between the electrode lug 2 and the plate grid body 1 is chamfered at R8.

[0028] In summary, this invention, by combining the surface and core layers, overcomes the shortcomings of traditional homogeneous alloys in balancing mechanical strength, conductivity, and corrosion resistance, achieving a balance of deformation resistance, corrosion resistance, and good conductivity. The hexagonal honeycomb mesh ensures uniform stress distribution along the rib axis, eliminates stress concentration at the right angles of the rectangular mesh, and forms a natural current-sharing network, reducing the risk of local overcharging. The chamfered structure further reduces the risk of stress concentration, improves corrosion resistance at rib intersections, and enhances current carrying capacity.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel multi-layer continuously rolled and cast grating, characterized in that, include: The grid body (1) and the tab (2) located at one end of the grid body (1); The plate grid body (1) includes a core layer (11) and a surface layer (12) disposed on both sides of the core layer (11); the plate grid body (1) has a plurality of through holes along its thickness direction.

2. The novel continuous rolling and casting grating according to claim 1, characterized in that, The four corners of the frame of the plate grid body (1) are all provided with R5 chamfers.

3. The novel continuous rolling and casting grating according to claim 1, characterized in that, The connection between the tab (2) and the grid body (1) is an R8 chamfer.

4. The novel continuous rolling and casting grating according to claim 1, characterized in that, The thickness ratio of the core layer (11) to the surface layer (12) is 3:

2.

5. The novel continuous rolling and casting grating according to claim 1, characterized in that, The core layer (11) has a thickness of 0.6 mm.

6. The novel continuous rolling and casting grating according to claim 1, characterized in that, The surface layer (12) includes a first surface layer and a second surface layer, both of which have a thickness of 0.2 mm.

7. The novel continuous rolling and casting grating according to claim 1, characterized in that, The through holes on the plate grid body (1) are regular hexagonal through holes with a side length of 10mm; the width of the ribs is 2mm, and the intersection of the ribs is a R5 chamfer.

Images