Bipolar lug grid for lead-acid storage battery

Abstract

The utility model discloses a double-tab grid for a lead-acid storage battery. The double-tab grid comprises a frame structure, a conductive grid and a conductive reinforcing rib assembly, a first tab and a second tab are fixedly mounted on the frame structure; the conductive grid is mounted on the inner wall of the frame structure, and a plurality of hexagonal meshes are formed in the conductive grid; the conductive reinforcing rib assembly is fixedly installed on the inner wall of the frame structure, and the conductive reinforcing rib assembly is fixedly connected with the conductive grid. Wherein the frame structure is of a rectangular structure, the cross section of each hexagonal mesh is in a regular hexagon shape, and the hexagonal meshes are arranged at equal intervals. According to the utility model, the charge-discharge efficiency of the battery and the overall strength of the grid are improved, the resistance of current transmission is reduced, the uniformity of current distribution is improved, the battery is not easy to deform in the charge-discharge process, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery technology, and in particular to a bipolar tab grid for lead-acid batteries. Background Technology

[0002] As the core component of lead-acid batteries, the grid serves both to support the active material and conduct current. However, traditional lead-acid battery grids often employ a single-tab design, meaning current can only flow in or out in one direction. This results in a long transmission path and significant differences in current density across different areas of the grid. The high current density near the tabs makes the active material prone to premature failure due to overcharging and discharging; conversely, the low current density further away from the tabs leads to insufficient utilization of the active material, ultimately reducing overall battery performance. Uneven current distribution exacerbates polarization during high-current charging and discharging, increasing potential loss, reducing charging and discharging efficiency, increasing energy loss, and impacting battery output power, energy density, and lifespan.

[0003] Furthermore, the traditional unipolar grid structure lacks sufficient strength. During battery charging and discharging, the grid is subjected to the expansion and contraction stress of the active material and electrolyte corrosion. Its simple structure lacks effective reinforcement, making it prone to deformation and breakage, which affects battery performance and reliability.

[0004] Therefore, a bipolar tab grid for lead-acid batteries is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a bipolar tab grid for lead-acid batteries, which aims to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a bipolar tab grid for lead-acid batteries, comprising:

[0007] A frame structure, on which a first electrode and a second electrode are fixedly mounted;

[0008] A conductive mesh is installed on the inner wall of the frame structure, and the conductive mesh has a plurality of hexagonal mesh holes.

[0009] A conductive reinforcing rib assembly is fixedly installed on the inner wall of the frame structure and is also fixedly connected to the conductive mesh.

[0010] The border structure is rectangular, the cross-sectional shape of the hexagonal mesh is regular hexagonal, and a plurality of the hexagonal mesh holes are arranged at equal intervals.

[0011] According to the present invention, a bipolar tab grid for a lead-acid battery is provided, wherein the conductive reinforcing rib assembly includes a plurality of transverse conductive ribs and a plurality of longitudinal conductive ribs; the plurality of transverse conductive ribs are fixedly installed on the two opposite inner sidewalls of the frame structure.

[0012] A plurality of the longitudinal conductive ribs are fixedly installed between the inner top wall and the inner bottom wall of the frame structure; a plurality of the transverse conductive ribs and a plurality of the longitudinal conductive ribs are all fixedly connected to the conductive mesh.

[0013] According to the present invention, a bipolar tab grid for a lead-acid battery is provided, wherein a plurality of longitudinal conductive ribs are arranged at equal intervals and a plurality of transverse conductive ribs are arranged at equal intervals.

[0014] According to the present invention, a bipolar plate grid for a lead-acid battery is provided, wherein the first tab and the second tab have the same structure and are arranged symmetrically.

[0015] According to the present invention, a bipolar tab grid for a lead-acid battery is provided, wherein the frame structure includes an upper frame, a lower frame, and two side frames. The upper frame and the lower frame are arranged in parallel. The tops of the two side frames are respectively fixed to the two sides of the upper frame, and the bottoms of the two side frames are respectively fixed to the two sides of the lower frame. The upper frame, the lower frame, and the two side frames together form a rectangular structure.

[0016] A plurality of the horizontal conductive ribs are fixedly installed between the two side frames, and a plurality of the vertical conductive ribs are fixedly installed between the upper frame and the lower frame. The top of the conductive mesh is fixedly connected to the upper frame, the bottom of the conductive mesh is fixedly connected to the lower frame, and the two sides of the conductive mesh are respectively fixedly connected to the two side frames. The first electrode and the second electrode are symmetrically installed on the top of the upper frame.

[0017] According to the present invention, a bipolar tab grid for a lead-acid battery has an upper frame length of 130mm to 170mm, a side frame length of 80mm to 120mm, and an upper frame thickness of 1.6mm to 2.4mm.

[0018] According to the present invention, a bipolar tab grid for a lead-acid battery has a hexagonal mesh with a side length of 2.0 mm to 5.0 mm and a conductive mesh thickness of 0.3 mm to 1.0 mm.

[0019] According to the present invention, a bipolar tab grid for a lead-acid battery has a width of 0.3mm to 0.8mm for both the transverse conductive ribs and the longitudinal conductive ribs.

[0020] The present invention discloses the following technical effects:

[0021] In this invention, the conductive grid has several hexagonal mesh holes, and the cross-sectional shape of the hexagonal mesh holes is a regular hexagon. The regular hexagonal mesh structure has good mechanical properties, which can evenly distribute the stress borne by the grid, improve the overall strength of the grid, and prevent deformation during battery charging and discharging. The conductive grid with several hexagonal mesh holes provides sufficient adhesion area for the active material, ensuring that the active material can be evenly distributed on the grid. During battery charging and discharging, the electrolyte can fully penetrate into the active material through the hexagonal mesh holes, providing a smooth channel for ion transport. Ions can move quickly and evenly in the electrolyte, reducing potential loss caused by ion concentration gradient and improving the charging and discharging efficiency of the battery.

[0022] This invention increases the conductive channels of the grid through the conductive reinforcing rib assembly, making the current transmission on the grid smoother, further reducing the resistance of current transmission, improving the uniformity of current distribution, and reducing potential loss; at the same time, the conductive ribs can also enhance the structural strength of the grid, prevent the grid from deforming during battery charging and discharging, and improve service life.

[0023] In this invention, the first tab and the second tab are the positive tab and the negative tab, respectively. Current can flow in and out simultaneously, making the current distribution on the grid body more uniform. Compared with the traditional single-tab grid, the double tab can reduce the transmission distance of current on the grid body, reduce the non-uniformity of current density, and improve the charging and discharging efficiency, capacity and cycle life of lead-acid batteries. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the bipolar tab grid for lead-acid batteries according to this utility model.

[0026] Among them, 1. First electrode tab; 2. Second electrode tab; 3. Conductive mesh; 4. Hexagonal mesh; 5. Horizontal conductive ribs; 6. Vertical conductive ribs; 7. Top frame; 8. Bottom frame; 9. Side frame. Detailed Implementation

[0027] 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.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1 This utility model provides a bipolar tab grid for lead-acid batteries, comprising:

[0030] The frame structure has a first tab 1 and a second tab 2 fixedly installed on it. The first tab 1 and the second tab 2 are connected to the frame structure by laser welding technology, which can ensure high connection strength and low resistance at the welded part, reduce contact resistance, and reduce energy loss of current during transmission, thereby reducing potential loss.

[0031] Conductive mesh 3 is installed on the inner wall of the frame structure, and several hexagonal mesh holes 4 are opened on the conductive mesh 3;

[0032] The conductive reinforcing rib assembly is fixedly installed on the inner wall of the frame structure and is also fixedly connected to the conductive mesh 3.

[0033] Among them, the border structure is a rectangular structure, the cross-sectional shape of the hexagonal mesh 4 is a regular hexagon, and several hexagonal meshes 4 are arranged at equal intervals;

[0034] With this configuration, the conductive grid 3 of this invention has several hexagonal mesh holes 4, and the cross-sectional shape of the hexagonal mesh holes 4 is a regular hexagon. The regular hexagonal mesh structure has good mechanical properties, which can evenly distribute the stress borne by the grid, improve the overall strength of the grid, and prevent deformation during battery charging and discharging. The conductive grid 3 with several hexagonal mesh holes 4 provides sufficient adhesion area for the active material, ensuring that the active material can be evenly distributed on the grid. During battery charging and discharging, the electrolyte can fully penetrate into the active material through the hexagonal mesh holes, providing a smooth channel for ion transport. Ions can move quickly and evenly in the electrolyte, reducing potential loss caused by ion concentration gradient and improving the charging and discharging efficiency of the battery.

[0035] This invention increases the conductive channels of the grid through the conductive reinforcing rib assembly, making the current transmission on the grid smoother, further reducing the resistance of current transmission, improving the uniformity of current distribution, and reducing potential loss; at the same time, the conductive ribs can also enhance the structural strength of the grid, prevent the grid from deforming during battery charging and discharging, and improve service life.

[0036] In this invention, the first tab and the second tab are the positive tab and the negative tab, respectively. Current can flow in and out simultaneously, making the current distribution on the grid body more uniform. Compared with the traditional single-tab grid, the double tab can reduce the transmission distance of current on the grid body, reduce the non-uniformity of current density, and improve the charging and discharging efficiency, capacity and cycle life of lead-acid batteries.

[0037] Further optimization of the scheme: the conductive reinforcing rib assembly includes several transverse conductive ribs 5 and several longitudinal conductive ribs 6; the several transverse conductive ribs 5 are fixedly installed on the two opposite inner side walls of the frame structure.

[0038] Several longitudinal conductive ribs 6 are fixedly installed between the inner top wall and the inner bottom wall of the frame structure; several transverse conductive ribs 5 and several longitudinal conductive ribs 6 are fixedly connected to the conductive mesh 3.

[0039] The scheme is further optimized by arranging several longitudinal conductive ribs 6 at equal intervals and several transverse conductive ribs 5 at equal intervals.

[0040] The presence of several transverse conductive ribs 5 and several longitudinal conductive ribs 6 increases the conductive channels of the grid. When current is transmitted on the grid, it can be quickly dispersed and conducted through the transverse conductive ribs 5 and several longitudinal conductive ribs 6, reducing the current transmission resistance and further improving the uniformity of current distribution. In addition, the conductive reinforcing rib assembly enhances the structural strength of the grid. During the charging and discharging process of the battery, the expansion and contraction stress of the active material and the corrosion of the electrolyte will affect the grid. The conductive ribs can share some of the stress, maintain the stability of the grid shape and size, prevent grid deformation, extend the grid service life, and improve the overall performance and reliability of the battery.

[0041] The scheme is further optimized so that the first electrode 1 and the second electrode 2 have the same structure and are symmetrically arranged.

[0042] The first tab 1 and the second tab 2 are respectively located at the two ends of the upper frame 7 and at a certain distance from the edge of the side frame 9. This allows the current to form a more reasonable distribution path on the grid, making the current density of each part of the grid body closer, thereby improving the uniformity of the current distribution on the entire electrode surface.

[0043] Further optimization of the design: the cross-sectional shape of the first electrode 1 and the second electrode 2 is rectangular. The rectangular electrode facilitates connection with external circuits and provides a larger conductive area.

[0044] The design is further optimized. The frame structure includes an upper frame 7, a lower frame 8, and two side frames 9. The upper frame 7 and the lower frame 8 are set in parallel. The top of the two side frames 9 is fixed to the two sides of the upper frame 7, and the bottom of the two side frames 9 is fixed to the two sides of the lower frame 8. The upper frame 7, the lower frame 8, and the two side frames 9 together form a rectangular structure.

[0045] Several horizontal conductive ribs 5 are fixedly installed between two side frames 9, and several vertical conductive ribs 6 are fixedly installed between the upper frame 7 and the lower frame 8. The top of the conductive mesh 3 is fixedly connected to the upper frame 7, the bottom of the conductive mesh 3 is fixedly connected to the lower frame 8, and the two sides of the conductive mesh 3 are fixedly connected to the two side frames 9 respectively. The first electrode 1 and the second electrode 2 are symmetrically installed on the top of the upper frame 7.

[0046] Further optimization of the design: the length of the top frame 7 is 130mm to 170mm, the length of the side frame 9 is 80mm to 120mm, and the thickness of the top frame 7 is 1.6mm to 2.4mm.

[0047] Further optimization of the scheme: the side length of the hexagonal mesh 4 is 2.0mm to 5.0mm, and the thickness of the conductive mesh 3 is 0.3mm to 1.0mm.

[0048] The design was further optimized so that the width of both the transverse conductive rib 5 and the longitudinal conductive rib 6 is 0.3mm to 0.8mm.

[0049] To further optimize the design, a conductive coating is applied to the surfaces of the conductive reinforcing rib assembly, the conductive mesh 3, and the frame structure. The coating material can be graphene, carbon nanotubes, or other materials with good conductivity. This embodiment does not impose any specific limitations.

[0050] The coating thickness is controlled between 5μm and 10μm. The conductive coating can reduce the contact resistance between the grid and the active material, so that the current can be transferred from the grid body to the active material more efficiently, thereby improving the charging and discharging efficiency of the battery and reducing energy loss.

[0051] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bipolar plate grid for a lead-acid battery, characterized in that, include: A frame structure, on which a first electrode (1) and a second electrode (2) are fixedly installed; A conductive mesh (3) is installed on the inner wall of the frame structure, and the conductive mesh (3) has a plurality of hexagonal mesh holes (4). A conductive reinforcing rib assembly is fixedly installed on the inner wall of the frame structure, and the conductive reinforcing rib assembly is fixedly connected to the conductive mesh (3); The frame structure is a rectangular structure, the cross-sectional shape of the hexagonal mesh (4) is a regular hexagon, and the hexagonal mesh (4) is arranged at equal intervals.

2. The bipolar tab grid for lead-acid batteries according to claim 1, characterized in that: The conductive reinforcing rib assembly includes several transverse conductive ribs (5) and several longitudinal conductive ribs (6); several of the transverse conductive ribs (5) are fixedly installed on the two opposite inner sidewalls of the frame structure; A plurality of the longitudinal conductive ribs (6) are fixedly installed between the inner top wall and the inner bottom wall of the frame structure; a plurality of the transverse conductive ribs (5) and a plurality of the longitudinal conductive ribs (6) are fixedly connected to the conductive mesh (3).

3. The bipolar tab grid for lead-acid batteries according to claim 2, characterized in that: The longitudinal conductive ribs (6) are arranged at equal intervals, and the transverse conductive ribs (5) are arranged at equal intervals.

4. The bipolar tab grid for lead-acid batteries according to claim 1, characterized in that: The first electrode (1) and the second electrode (2) have the same structure, and the first electrode (1) and the second electrode (2) are symmetrically arranged.

5. The bipolar plate grid for lead-acid batteries according to claim 2, characterized in that: The frame structure includes an upper frame (7), a lower frame (8), and two side frames (9). The upper frame (7) and the lower frame (8) are arranged in parallel. The top of the two side frames (9) is fixed to the two sides of the upper frame (7), and the bottom of the two side frames (9) is fixed to the two sides of the lower frame (8). The upper frame (7), the lower frame (8), and the two side frames (9) together form a rectangular structure. A plurality of the transverse conductive ribs (5) are fixedly installed between the two side frames (9), and a plurality of the longitudinal conductive ribs (6) are fixedly installed between the upper frame (7) and the lower frame (8). The top of the conductive mesh (3) is fixedly connected to the upper frame (7), the bottom of the conductive mesh (3) is fixedly connected to the lower frame (8), and the two sides of the conductive mesh (3) are respectively fixedly connected to the two side frames (9). The first electrode (1) and the second electrode (2) are symmetrically installed on the top of the upper frame (7).

6. The bipolar tab grid for lead-acid batteries according to claim 5, characterized in that: The length of the upper frame (7) is 130mm to 170mm, the length of the side frame (9) is 80mm to 120mm, and the thickness of the upper frame (7) is 1.6mm to 2.4mm.

7. The bipolar tab grid for lead-acid batteries according to claim 1, characterized in that: The side length of the hexagonal mesh (4) is 2.0 mm to 5.0 mm, and the thickness of the conductive mesh (3) is 0.3 mm to 1.0 mm.

8. The bipolar tab grid for lead-acid batteries according to claim 2, characterized in that: The width of both the transverse conductive rib (5) and the longitudinal conductive rib (6) is 0.3mm to 0.8mm.

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