CN209104269U - A kind of positive grid of the punching of high-temperature corrosion resistance - Google Patents

Abstract

A high-temperature corrosion-resistant punched positive grid, comprising an upper frame, a lower frame, a left frame, a right frame, horizontal ribs and vertical ribs, the upper part of the upper frame is provided with plate ears, and the width of the vertical ribs decreases from top to bottom. ; The width dimension of the transverse rib decreases from top to bottom. According to the corrosion failure mode analysis of the positive grid of a failed battery, the utility model designs a punched positive grid with gradual rib width and interval width for the most prone to corrosion part of the positive grid. The positive grid strengthens the corrosion-prone upper structure, and at the same time reduces the material input at the lower part of the grid that is not easy to corrode. On the one hand, the above structure effectively solves the problem of premature failure of the battery caused by the corrosion of the positive grid, and on the other hand, it reasonably controls the product cost, which is feasible for mass promotion and application.

Description

A kind of punched positive grid with high temperature corrosion resistance

technical field

The utility model relates to a battery part, in particular to a high-temperature corrosion-resistant positive grid, which belongs to the technical field of batteries.

Background technique

Lead-acid batteries are mainly composed of battery shells, positive and negative plates, separators and electrolytes. Among them, the electrode plate is the core part of the lead-acid battery as the carrier for the electrochemical reaction. The plate is composed of grid and active material. The grid is an important part of the battery. As a carrier to support the active material, the current is evenly distributed on the active material, which improves the utilization rate of the active material and prevents the deformation of the electrode plate. At present, there are generally three ways to manufacture positive grids, gravity casting, drawing net, and punching. Casting grids have large thickness and weight and good performance, but low production efficiency and high cost. The punching grid adopts a certain specification of cold-rolled lead strip or lead alloy strip to be punched and formed by a die on a punching machine. Compared with gravity cast grids, punched grids have high production efficiency and are 15% to 20% lighter than gravity cast grids, but the thickness of punched grids is limited, generally not exceeding 1.4mm. In addition, the production of perforated grids has low energy consumption and low pollution, which is the development direction of lead-acid batteries. The main reason for the failure of lead-acid batteries used in high temperature environments is the corrosion of the positive grid. Because the positive grid is always under the action of a high electrode potential, its main component lead is easily oxidized and corroded to lead oxide. As the number of times of charging and discharging increases, the positive grid is corroded and becomes thinner and thinner, or even breaks, eventually leading to battery failure. Usually, battery manufacturers increase the thickness of the positive grid to prolong the corrosion resistance time of the positive plate, thereby prolonging the service life, but the thickness of the punched positive grid is limited. Therefore, a reasonable grid structure should be designed to solve the problem of the punched positive grid. High temperature corrosion resistance is an urgent problem to be solved.

Utility model content

The purpose of the utility model is to provide a perforated positive grid with high temperature corrosion resistance. Based on the research and analysis of the corrosion failure mode, the utility model rationally designs the punched grid structure, improves its high temperature corrosion resistance and prolongs the service life.

The problems described in the present utility model are solved by the following technical solutions:

A high-temperature corrosion-resistant punched positive grid, comprising an upper frame, a lower frame, a left frame, a right frame, a horizontal rib, and a vertical rib, the upper part of the upper frame is provided with a plate lug, and the width of the vertical rib decreases from top to bottom. ; The width dimension of the transverse rib decreases from top to bottom.

In the above-mentioned high-temperature corrosion-resistant punched positive grid, the spacing between adjacent transverse ribs increases from top to bottom.

In the above-mentioned high-temperature corrosion-resistant punched positive grid, the upper end width dimension of the vertical ribs is 2-3 times the lower end width dimension.

For the above-mentioned high-temperature corrosion-resistant punched positive grid, the maximum spacing distance of the lower transverse ribs is 1.2-1.5 times the minimum spacing distance of the upper transverse ribs

In the above-mentioned high-temperature corrosion-resistant punched positive grid, the width dimension of the upper transverse rib is 1.6-1.8 times that of the lower transverse rib.

In the above-mentioned high-temperature corrosion-resistant punched positive grid, the width of the upper frame is 2-3 times the width of the lower frame.

According to the corrosion failure mode analysis of the positive grid of a failed battery, the utility model designs a punched positive grid with the width of the rib and the interval width gradually changing for the part where the positive grid is most likely to be corroded. The positive grid strengthens the corrosion-prone upper structure, and at the same time reduces the material input at the lower part of the grid that is not easy to corrode. On the one hand, the above structure effectively solves the problem of premature failure of the battery caused by the corrosion of the positive grid, and on the other hand, it reasonably controls the product cost, which is feasible for mass promotion and application. On the premise of not increasing the production cost, the utility model solves the problem of premature battery failure caused by the high temperature corrosion of the positive grid that has plagued battery manufacturers for many years, and improves the service life of the battery.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings.

Figure 1 is a schematic structural diagram of the present invention.

The list of labels in the figure is: 1, plate lug, 2, upper frame, 3, left frame, 4, lower frame, 5, right frame, 6, vertical bars, 7, horizontal bars.

Detailed ways

Referring to FIG. 1, the present utility model includes an upper frame 2, a lower frame 4, a left frame 3, and a right frame 5, and horizontal ribs 7 and vertical ribs 6 are arranged in the rectangular frame surrounded by the upper, lower, left and right frames. The upper part of the frame is provided with a plate lug 1 . The utility model finds by dissecting a large number of life tests and returning batteries that the battery fails due to the corrosion of the positive grid, and the corrosion part is mainly concentrated in the middle and upper part of the positive grid. Therefore, based on controlling production cost and prolonging product life, the following structural design is proposed to the present utility model:

1. The width of the vertical bars decreases from top to bottom, and the width of the upper end of the vertical bars is 2-3 times the width of the lower end.

2. The width of the transverse bars decreases from top to bottom, and the width of the upper transverse bars is 1.6-1.8 times the width of the lower transverse bars.

3. The spacing between adjacent transverse bars increases from top to bottom, and the maximum spacing distance between the lower adjacent transverse ribs is 1.2-1.5 times the minimum spacing distance between the upper adjacent transverse ribs.

4. The width of the upper border is 2-3 times the width of the lower border.

Two specific embodiments of the present utility model are provided below:

Example 1: The height of the grid is 98 mm, the width of the upper end of the vertical bars is 3 mm, and the width of the lower end is 1.3 mm; the width of the upper horizontal bars is 2.5 mm, and the width of the lower bars is 1.5 mm; the interval between the lower bars is 1.5 mm. The distance is 12 mm and the spacing distance of the upper cross bars is 9.9 mm. The width of the upper border is 5 mm and the width of the lower border is 2 mm.

Example 2: The height of the grid is 114 mm, the width of the upper end of the vertical bar is 3 mm, and the width of the lower end is 1.0 mm; the width of the upper horizontal bar is 2.5 mm, and the width of the lower horizontal bar is 1.5 mm; The spacing distance is 14 mm, and the spacing distance between the upper adjacent cross bars is 9.9 mm. The width of the upper border is 5 mm and the width of the lower border is 2 mm.

Claims (4)

1. A high-temperature corrosion-resistant punched positive grid, comprising an upper frame (2), a lower frame (4), a left frame (3), a right frame (5), horizontal ribs (7), and vertical ribs (6), The upper part of the upper frame is provided with a plate lug (1), which is characterized in that: the width dimension of the vertical rib decreases from top to bottom; the width dimension of the horizontal rib decreases from top to bottom; The spacing distance between adjacent transverse bars increases from top to bottom; The width of the upper border is 2-3 times the width of the lower border. 2 . The high temperature corrosion resistant punched positive grid according to claim 1 , wherein the width of the upper end of the vertical rib is 2-3 times the width of the lower end. 3 . 3. The high-temperature corrosion-resistant punched positive grid according to claim 2, wherein the maximum spacing distance of the lower transverse ribs is 1.2-1.5 times the minimum spacing distance of the upper transverse ribs. 4 . The high-temperature corrosion-resistant punched positive grid according to claim 3 , wherein the width dimension of the upper transverse rib is 1.6-1.8 times the width of the lower transverse rib. 5 .