Corrosion-resistant storage battery grid structure

Abstract

The utility model relates to a corrosion-resistant storage battery grid structure which comprises a grid total frame, an upper frame part is arranged at the upper part of the grid total frame, the upper frame part comprises an upper frame and a reinforcing structure integrally formed with the upper frame, conductive ribs are arranged on the inner side of the grid total frame by taking the reinforcing structure as the center, and the upper frame is provided with a tab. A slope surface structure is formed at the joint of the tab and the upper frame, and is used for increasing the area of the joint of the tab and the upper frame so as to provide a buffer space for the conductive ribs to be corroded, expanded and deformed. According to the utility model, the problem of internal short circuit caused by corrosion increase of the grid is solved, so that the cycle performance of the storage battery is remarkably improved, the reliable operation of the storage battery in a dual-purpose application scene of power and starting is ensured, the service life of the storage battery is prolonged, and the overall stability of an automobile electrical system is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a corrosion-resistant battery grid structure. Background Technology

[0002] With the rapid development of the automotive industry, car design is increasingly focusing on human-centered design and comfort. The significant increase in onboard electrical components has led to a substantial rise in the demand for battery power. The role of the battery has also shifted from a simple starting battery to a dual-purpose battery for both power and starting. Under this new application model, batteries need to undergo frequent charging and discharging operations, especially in high-temperature environments, where their operating conditions become extremely demanding.

[0003] Currently, conventional battery grid structures (such as...) Figure 1 As shown, the planar frame structure design of the battery exhibits severe limitations during high-temperature cyclic discharge. In practical applications, the positive grid of the battery is prone to corrosion during high-temperature cyclic discharge, and this corrosion leads to grid growth over time. When the positive grid grows to a certain extent, it will come into contact with the negative busbar, causing an internal short circuit. This type of battery failure due to grid corrosion is extremely common in high-temperature operating environments, and its failure rate remains consistently high. This not only significantly shortens the battery's lifespan and reduces its performance stability but also poses a potential threat to the normal operation and safety of the vehicle. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a corrosion-resistant battery grid structure, the specific technical solution of which is as follows:

[0005] A corrosion-resistant battery grid structure includes a grid frame, with an upper frame at the top. The upper frame includes an upper side frame and a reinforcing structure integrally formed with the upper side frame. Multiple conductive ribs are arranged on the inner side of the grid frame around the reinforcing structure. A tab is provided on the upper side frame. A sloping surface structure is formed at the connection between the tab and the upper side frame. The sloping surface structure is used to increase the area at the connection between the tab and the upper side frame to provide a buffer space for the conductive ribs to expand and deform due to corrosion. When the conductive ribs deform and come into contact with the buffer space, they can be blocked by the reinforcing structure to prevent the growth of the grid frame.

[0006] As an improvement to the above technical solution: the inclination angle between the slope structure and the horizontal plane is 30 degrees to 60 degrees, and the length of the slope structure is 5 to 15 mm.

[0007] As an improvement to the above technical solution, the reinforcing structure is made of lead-calcium-tin-aluminum alloy.

[0008] As an improvement to the above technical solution, the spacing between adjacent conductive ribs is 3-6 mm.

[0009] As an improvement to the above technical solution,

[0010] The beneficial effects of this utility model are:

[0011] The sloping surface structure increases the area at the connection between the tabs and the upper frame, providing a buffer space for the conductive ribs to expand and deform due to corrosion. When the conductive ribs deform and come into contact with the buffer space, they can be blocked by the reinforced structure to prevent the grid frame from growing and avoid contact with the negative busbar. This solves the problem of internal short circuit caused by grid corrosion growth during high-temperature cyclic charging and discharging of automotive batteries, thereby significantly improving the cycle performance of the battery, ensuring its reliable operation in dual-purpose power and starting applications, extending the battery's service life, and improving the overall stability of the automotive electrical system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a battery grid in the prior art;

[0013] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0014] Reference numerals: 1. Overall frame of the grid; 2. Top frame; 3. Electrode; 4. Sloping surface structure; 5. Conductive ribs. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] Example

[0017] Please refer to Figure 2 A corrosion-resistant battery grid structure includes a grid frame 1. The upper part of the grid frame 1 is provided with an upper frame portion, which includes an upper frame 2 and a reinforcing structure integrally formed with the upper frame 2. Multiple conductive ribs 5 are arranged on the inner side of the grid frame 1 with the reinforcing structure as the center. The upper frame 2 is provided with a tab 3. A ramp structure 4 is formed at the connection between the tab 3 and the upper frame 2. The ramp structure 4 is used to increase the area at the connection between the tab 3 and the upper frame 2 to provide a buffer space for the conductive ribs 5 to expand and deform due to corrosion, and to increase the current passing area. When the conductive ribs 5 deform and come into contact with the buffer space, they can be blocked by the reinforcing structure to prevent the growth of the grid frame 1.

[0018] Specifically, by increasing the area at the connection point with the electrode through the sloping structure, the area at the connection point is increased by 10%-30% (the specific value can be adjusted according to experiments and actual applications), thereby increasing the current flow area, reducing the current density, and reducing the risk of corrosion.

[0019] Strengthen the structure by using more corrosion-resistant materials or increasing the material thickness, such as using high-purity lead alloy material with a thickness increased by 0.1-0.3mm (adjustable) compared to the original structure, to improve the structural strength and corrosion resistance of the upper frame.

[0020] Furthermore, the structural parts can be reinforced with specially treated lead alloys, such as adding trace amounts of rare earth elements (such as cerium, lanthanum, etc., with a content of 0.001%-0.01%) to the above-mentioned lead-calcium-tin-aluminum alloys to further enhance their corrosion resistance and deformation resistance.

[0021] For the main material of the grid, a lead alloy with good corrosion resistance and electrical conductivity can be selected, such as a lead-calcium-tin-aluminum alloy, in which the lead content is 90%-95% (adjustable), the calcium content is 0.05%-0.15%, the tin content is 0.3%-1.5%, and the aluminum content is 0.01%-0.05%. This alloy composition can improve the corrosion resistance of the grid while ensuring electrical conductivity.

[0022] Surface treatments, such as passivation, can be applied to the cast grid. A chromate passivation solution (chromic anhydride concentration of 3%-8%, pH value of 1.5-3.5) can be used to passivate the grid surface, forming a dense passivation film with a thickness between 0.005-0.02 mm, thereby improving the grid's corrosion resistance.

[0023] In an optional embodiment: the inclination angle between the ramp structure 4 and the horizontal plane is 30 degrees to 60 degrees, the length of the ramp structure 4 is 5 to 15 mm, and the horizontal direction is... Figure 2 The X direction is shown.

[0024] In an optional embodiment, the spacing between adjacent conductive ribs 5 is 3-6 mm.

[0025] Specifically, conductive ribs are evenly arranged at certain intervals and angles, with the reinforcing structure as the center. The rib spacing can be set to 3-6mm (optimizable), and the angle is determined according to the overall shape of the grid and the direction of current conduction, generally between 30 degrees and 60 degrees, to ensure that the current is evenly distributed within the grid. At the same time, when corrosion occurs, the interaction between the ribs and the reinforcing structure is used to limit the direction and extent of corrosion expansion.

[0026] This layout allows for more uniform and efficient current conduction within the grid. Furthermore, when the grid is corroded, the ribs and reinforcing structure work together to form an effective physical constraint mechanism, inhibiting grid deformation and corrosion growth. For example, in a simulated corrosion experiment on a novel grid structure, when the corrosion level reached a certain point, the deformation of the traditional grid structure reached 5 mm, while the deformation of the grid using this novel structure was controlled within 1 mm.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrosion resistant battery grid structure, characterized by, The system includes a grid frame (1), with an upper frame portion on the upper part of the grid frame (1). The upper frame portion includes an upper frame (2) and a reinforcing structure integrally formed with the upper frame (2). The upper frame (2) has a tab (3). A ramp structure (4) is formed at the connection between the tab (3) and the upper frame (2). The ramp structure (4) is used to increase the area at the connection between the tab (3) and the upper frame (2) to provide a buffer space for the conductive ribs (5) to be corroded, expanded, and deformed. Multiple conductive ribs (5) are arranged on the inner side of the grid frame (1) with the reinforcing structure as the center. When the conductive ribs (5) deform and come into close contact with the buffer space, they can be blocked by the reinforcing structure to prevent the growth of the grid frame (1).

2. The corrosion-resistant battery grid structure according to claim 1, characterized in that: The inclination angle between the slope structure (4) and the horizontal plane is 30-60 degrees, and the length of the slope structure (4) is 5-15 mm.

3. A corrosion resistant battery grid structure according to claim 2 wherein: The reinforcing structure is made of lead-calcium-tin-aluminum alloy.

4. A corrosion resistant battery grid structure according to claim 3 wherein: The spacing between adjacent conductive ribs (5) is 3-6 mm.

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