A new structure of plate grid

Abstract

The application discloses a novel structure plate grid, which comprises a frame and at least two tabs, the frame is internally provided with a rib strip grid, two tabs are respectively located at two ends of the frame, the rib strip grid comprises a first grid part and a second grid part, the first grid part is located at the middle of the plate grid, the second grid part is located at two sides of the first grid part, the grid density of the first grid part is greater than that of the second grid part, the first grid part is composed of horizontal rib strips and inclined rib strips, the second grid part is composed of horizontal rib strips and vertical rib strips, the rib strip grid further comprises a plurality of grid levels, and the grid density and the number of current conduction paths of the plurality of grid levels change in a gradient manner from the center of the rib strip grid to two sides. The novel structure plate grid is provided, the structure of the plate grid is changed, the plate grid has a hierarchical structure changing in a gradient manner, and the consistency of the current density of each part of the plate grid can be gradiently adjusted.

Description

Technical Field

[0001] This utility model relates to the technical field of storage batteries, and more specifically, to a novel structural grid. Background Technology

[0002] In a storage battery, the electrode group refers to the assembly of the positive and negative electrodes. The electrode group is an important component of the energy storage unit of the storage battery and constitutes the electrochemical reaction of the battery. Furthermore, the electrode group consists of plates and separators. The plates contain grids and active materials. The grids can be used to support the structure, conduct electricity, transfer electrons, provide ion channels, and promote the diffusion of substances. The utilization rate of the active materials in the storage battery is affected by the grid structure of the plates.

[0003] In the prior art, for example CN202121541592X, a bipolar lug grid is provided. The bipolar lug grid includes a frame and lugs. The frame includes an upper frame, a lower frame, a left frame, and a right frame. The lugs include a first lug and a second lug. The first lug and the second lug are symmetrically arranged on the upper frame, and ribs are provided inside the frame.

[0004] In the above-mentioned electrode group scheme, the grid can be divided into an upper part and a lower part. The current density of the lower part of the grid, which is far from the tab, is lower and the utilization rate of active material is lower. The consistency of the utilization rate of active material between the upper and lower parts of the grid is poor. The current density of the upper part of the grid is high and the corrosion rate is accelerated. The utilization rate of active material in the lower part of the grid is low, the active material is prone to mud formation, and it causes premature battery failure. Utility Model Content

[0005] The purpose of this invention is to provide a new type of grid structure. By changing the structure of the grid, the grid has a rib structure with gradient changes, which can gradient adjust the consistency of current density in different parts of the grid.

[0006] 1. According to the purpose of this application, a novel structural grid is provided, including a frame and at least two tabs, wherein the frame is provided with a ribbed grid; the two tabs are respectively located at both ends of the frame; the ribbed grid includes a first grid portion and a second grid portion, the first grid portion being located in the middle of the grid, and the second grid portion being located on both sides of the first grid portion; the grid density of the first grid portion is greater than the grid density of the second grid portion; the first grid portion is composed of horizontal ribs and diagonal ribs; the second grid portion is composed of horizontal ribs and vertical ribs; the ribbed grid further includes multiple grid levels, and the grid density of the multiple grid levels and the number of current conduction paths change in a gradient from the center of the ribbed grid to both sides.

[0007] 2. In some embodiments, the frame is further provided with reinforcing ribs; the reinforcing ribs are located in the middle of the grid, and the two ends of the reinforcing ribs are connected to the frame; the first grid portion and the second grid portion are symmetrically arranged on both sides of the reinforcing ribs.

[0008] 3. In some embodiments, the number of horizontal ribs in the first grid portion is the same as the number of horizontal ribs in the second grid portion, and the number of diagonal ribs is twice the number of vertical ribs.

[0009] 4. In some embodiments, the diagonal ribs and horizontal ribs intersect to form a V-shaped grid; the vertical ribs and horizontal ribs intersect to form a grid.

[0010] 5. In some embodiments, the V-shaped structure formed by the diagonal ribs has an opening facing the reinforcing rib.

[0011] 6. In some embodiments, the width of the diagonal stiffener is smaller than the width of the vertical stiffener.

[0012] 7. In some embodiments, the first mesh portion and the second mesh portion located on the same side of the reinforcing rib have the same proportion.

[0013] 8. In some embodiments, the first grid portion and the second grid portion in the rib mesh have the same proportion.

[0014] 9. In some embodiments, the two tabs are arranged symmetrically with respect to the center point of the grid.

[0015] 10 In some embodiments, the frame, tabs, and rib mesh are integrally formed.

[0016] According to the technical solution of this utility model, the grid includes a frame and at least two tabs, with the two tabs located at both ends of the frame, which can significantly increase the current density at both ends of the grid. A ribbed grid is provided within the frame, comprising a first mesh and a second mesh portion. Specifically, the first mesh portion is located in the middle of the grid and is far from the two tabs, while the second mesh portion is located on both sides of the first mesh portion and is close to the tabs. The mesh density of the first mesh portion is greater than that of the second mesh portion. The higher mesh density of the first mesh increases the current density, reducing the current density difference between the parts of the grid far from and near the tabs. The first mesh portion is composed of horizontal and diagonal ribs, and the second mesh portion is composed of horizontal and vertical ribs. The ribbed grid also includes multiple mesh levels, and the mesh density and the number of current conduction paths of the multiple mesh levels change in a gradient from the center of the ribbed grid to both sides, thereby gradient-adjusting the current density of different parts of the grid. Attached Figure Description

[0017] The above and other features, properties and advantages of this application will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments. It should be noted that the drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection of this application, wherein:

[0018] Figure 1 This is a perspective view of the grid plate of this application;

[0019] Figure 2 This is a front view of the grid in this application;

[0020] Figure 3 This is a rear view of the grid in this application;

[0021] Figure 4 This is a reference diagram showing the usage state of the grid in this application;

[0022] In the diagram: 1. Border; 2. Electrode; 3. Rib grid; 30. Grid level; 300. Grid section; 301. First grid layer; 302. Second grid layer; 303. Third grid layer; 31. Horizontal rib; 32. Diagonal rib; 33. Vertical rib; 4. First grid section; 5. Second grid section; 6. Reinforcing rib; 7. Electrode plate. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0024] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment herein. This phrase appearing in the specification does not necessarily refer to the same embodiment, nor is it limited to mutually exclusive, independent, or alternative embodiments. Those skilled in the art will understand that the embodiments herein can be combined with other embodiments without causing structural conflicts.

[0025] In this description, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," etc., should be interpreted broadly, and can refer to movable connections, fixed connections, or integration. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0026] In this description, terms such as “up,” “down,” “left,” “right,” “height,” “length,” and “width,” which indicate orientation or positional relationships, are intended to accurately describe the embodiments and simplify the description, rather than to limit the parts or structures involved to have a specific orientation or to be installed or operated in a specific orientation.

[0027] Please see Figure 1The figure shows a perspective view of the grid of this application. The grid includes a frame 1 and at least two tabs 2. The frame 1 is a rectangular frame. The tabs 2 are used as contact plates during charging and discharging. The grid can form an electrode group by stacking individual units without splicing with other grids. The frame 1 is provided with a rib grid 3, which is formed by several ribs interlacing. The structure of the rib grid 3 can adjust the current density of each part of the grid. The two tabs 2 are located at both ends of the frame 1. The two tabs 2 are located on the outside of the frame 1 and are arranged back to back, which can improve the current density at both ends of the grid and increase the utilization rate of active material.

[0028] The rib mesh 3 includes a first mesh portion 4 and a second mesh portion 5, the outer contours of which are rectangular. The rib mesh 3 comprises one first mesh portion 4 and two second mesh portions 5. The first mesh portion 4 is located in the middle of the grid, between the two second mesh portions 5, and the second mesh portions 5 are located on both sides of the first mesh portion 4. The mesh density of the first mesh portion 4 is greater than that of the second mesh portions 5. This mesh density setting is related to the current density and can increase the current density in the grid located away from the tab 2. The first mesh portion 4 and the second mesh portion 5 in the rib mesh 3 have the same proportion. This rib mesh structure can reduce the current density difference between different parts of the grid and improve the consistency of the current density throughout the grid.

[0029] Preferably, in this embodiment, the frame 1 is further provided with a reinforcing rib 6, which is long and rectangular in shape, and the width of the reinforcing rib 6 is greater than the width of the frame 1. The reinforcing rib 6 is located in the middle of the grid, and the two ends of the reinforcing rib 6 are connected to the frame 1. The reinforcing rib 6 can improve the structural strength of the middle part of the grid.

[0030] Furthermore, in this embodiment, the reinforcing mesh 3 includes two first mesh portions 4 and two second mesh portions 5. The two first mesh portions 4 are located in the middle of the grid and between the two second mesh portions 5. The mesh density of the first mesh portions 4 is greater than that of the second mesh portions 5. This mesh density setting scheme can improve the current density in the grid away from the tab 2. Furthermore, the first mesh portions 4 and the second mesh portions 5 are symmetrically arranged on both sides of the reinforcing rib 6, and the proportions of the first mesh portions 4 and the second mesh portions 5 on the same side of the reinforcing rib 6 are the same. The current density of each part of the grid structure is more consistent, the utilization rate of active material is improved, the sulfation of active material is slowed down, and the consistency of the utilization rate of active material in each part of the grid is increased.

[0031] Preferably, in this embodiment, the frame 1, the tabs 2, and the rib mesh 3 are integrally formed.

[0032] Please see Figure 2 and Figure 3The figures show the front view and rear view of the grid of this application, respectively. The first grid section 4 is composed of horizontal ribs 31 and diagonal ribs 32, and the second grid section 5 is composed of horizontal ribs 31 and vertical ribs 33. Regarding the horizontal ribs 31, the horizontal ribs 31 in the rib grid 3 are arranged parallel to each other along the length axis of the grid. The horizontal ribs 31 are used to carry the active material, and the distribution of each horizontal rib 31 is relatively uniform. The number of horizontal ribs 31 in the first grid section 4 is the same as the number of horizontal ribs 31 in the second grid section 5. Regarding the diagonal ribs 32 and vertical ribs 33, the diagonal ribs... The diagonal ribs 32 and vertical ribs 33 are used to conduct current. The number of diagonal ribs 32 is twice the number of vertical ribs 33. By increasing the number of diagonal ribs 32 without increasing the area of ​​the unit grid, the current density of the first grid section 4 is increased, thereby increasing the utilization rate of the active material in the middle of the grid. Furthermore, the width of the diagonal ribs 32 is smaller than the width of the vertical ribs 33. The advantage of this scheme is that by adjusting the width design of the diagonal ribs 32 and vertical ribs, the consistency of the current density when the diagonal ribs 32 and vertical ribs 33 conduct current in the grid can be adjusted.

[0033] Preferably, in this embodiment, in the first grid section 4, the diagonal ribs 32 and the horizontal ribs 31 intersect to form a V-shaped grid. The opening of the V-shaped structure formed by the diagonal ribs 32 faces the reinforcing rib 6. Specifically, the ends of two adjacent diagonal ribs 32 are connected to form a V-shaped rib, and the opening of the V-shaped rib faces the reinforcing rib 6. Further, the opening ends of two adjacent V-shaped ribs intersect, and the two intersecting diagonal ribs 32 form an X-shaped rib.

[0034] In some embodiments, the alternative options include that the diagonal ribs 32 and the horizontal ribs 31 in the first grid section 4 intersect to form a W-shaped grid, or that the diagonal ribs 32 and the horizontal ribs 31 intersect to form a wavy grid.

[0035] In some embodiments, when the reinforcing ribs 6 are not provided, the diagonal ribs 32 and the horizontal ribs 31 in the first grid section 4 are interlaced to form a diamond grid. Specifically, the ends of the four diagonal ribs 32 are connected to form a diamond rib.

[0036] Preferably, in this embodiment, in the second grid section 5, the vertical ribs 33 and the horizontal ribs 31 are interlaced to form a grid, or the vertical ribs 33 and the horizontal ribs 31 are interlaced to form a cross-shaped grid; the vertical ribs 33 and the horizontal ribs 31 are perpendicular to each other, and several vertical ribs 33 are arranged in parallel at intervals to form a rectangular grid structure.

[0037] The reinforcing rib 6 has five horizontal ribs 31, six vertical ribs 33 and twelve diagonal ribs 32 on both sides.

[0038] Furthermore, the reinforcing mesh 3 also includes multiple mesh levels 30, and the mesh density and the number of current conduction paths of the multiple mesh levels 30 change in a gradient from the center of the reinforcing mesh 3 to both sides. Specifically, the reinforcing mesh 3 includes two mesh partitions 300. The first mesh part 4 and the second mesh part 5 located on the same side of the reinforcing rib 6 form a mesh partition 300. Using the second and fourth horizontal reinforcing ribs 31 in the mesh partition 300 as dividing lines, the mesh partition 300 is divided into a first mesh layer 301 level 30, a second mesh layer 302 level 30, and a third mesh layer 303 level 30. The first mesh layer 301 level 30 is adjacent to the tab 2 and is composed of horizontal reinforcing ribs 31 and vertical reinforcing ribs 33. The structure consists of twelve rib segments for conducting current. The second grid layer 302 is located between the first grid layer 301 and the third grid layer 303. The second grid layer 302 consists of horizontal ribs 31, vertical ribs 33, and diagonal ribs 32, and has eighteen rib segments for conducting current. The third grid layer 303 is adjacent to the reinforcing rib 6. The third grid layer 303 consists of horizontal ribs 31 and diagonal ribs 32, and has twenty-four rib segments for conducting current. The more rib segments for conducting current within a grid layer 30, the more possible current conduction paths there are. Ideally, the three-segment grid layer 30 structure allows for gradient adjustment of the current density in different parts of the grid.

[0039] Furthermore, in the first grid section 4, there are two horizontal ribs 31, wherein the horizontal rib 31 adjacent to the reinforcing rib 6 is an intersecting rib, and the intersection point of the two intersecting diagonal ribs 32 is located on the intersecting rib.

[0040] Furthermore, in the first grid section 4, there are two oblique ribs 32 that do not intersect with other oblique ribs 32. These two oblique ribs 32 are adjacent to the frame 1 and are located on the two sides of the first grid section 4. Since they do not intersect with other oblique ribs 32, there are fewer current conduction paths at the locations of these two oblique ribs 32. Through the above structure, the center grid density of the rib grid 3 is high and the surrounding grid density is low, so as to further balance the current density of each part of the grid.

[0041] In some embodiments, the reinforcing mesh 3, not shown in the figures, includes multiple mesh levels 30. However, the multiple mesh levels 30 referred to here are located in the first mesh section 4. The first mesh section 4 is composed of horizontal reinforcing bars 31 and diagonal reinforcing bars 32. The first mesh section 4 can be divided into a first mesh layer 301 level 30, a second mesh layer 302 level 30, and a third mesh layer 303 level 30 by two horizontal reinforcing bars 31 as dividing lines. In the first mesh section 4, there are two horizontal reinforcing bars 31. The horizontal reinforcing bar 31 adjacent to the reinforcing rib 6 is an intersecting bar. The intersection point of the two intersecting diagonal reinforcing bars 32 is located below the intersecting bar. The first grid layer 301 level 30 is adjacent to the second grid section 5. There are eighteen rib intersection points in the first grid layer 301 level 30. The second grid layer 302 level 30 is located between the first grid layer 301 level 30 and the third grid layer 303 level 30. There are twenty-four rib intersection points in the second grid layer 302 level 30. The third grid layer 303 level 30 is adjacent to the reinforcing rib 6. There are twenty-nine rib intersection points in the third grid layer 303 level 30. The more intersection points in the grid layer 30, the higher the efficiency of current conduction. By the difference in the number of rib intersection points between different grid layers 30, the current density of each part of the grid can be adjusted by gradient.

[0042] Please see Figure 4 The diagram shows a reference image of the grid in use according to this application. The traditional grid structure consists of a frame 1, horizontal ribs 31, vertical ribs 33, and tabs 2. The current density and potential energy are lower in the grid where the distance from the tabs 2 is greater, and the utilization rate of the active material is also lower. This results in poor consistency in the utilization rate of the active material at the top and bottom, which leads to faster failure of the electrode plate 7. In this embodiment, by changing the structure of the grid, the two tabs 2 are symmetrically arranged with respect to the center point of the grid. Specifically, the two tabs 2 are diagonally arranged on the frame 1, which increases the length of the current conduction path in the active material. Combined with the above-mentioned reinforcing ribs 6 and rib grid 3 structure, the current density of the symmetrical parts of the grid is the same. Compared with the traditional grid structure, the same current reaches the inside of the grid through the two tabs 2. When the current passes through, the current density of each part of the grid is consistent with that of its symmetrical position. The utilization rate of the active material in the grid is significantly improved. This grid structure can also slow down the sulfation of the active material in the electrode plate 7 and achieve consistency in the utilization rate of the active material at both ends of the grid.

[0043] The purpose of the above embodiments is to provide a detailed description of the present invention in conjunction with the accompanying drawings, so that those skilled in the art can understand the technical concept of the present invention. Within the scope of the claims of the present invention, optimization or equivalent replacement of the involved part structure, as well as combination of implementation methods in different embodiments without causing structural and principle conflicts, all fall within the protection scope of the present invention.

Claims

1. A novel structural plate grid, characterized in that, It includes a frame (1) and at least two tabs (2), wherein the frame (1) is provided with a rib grid (3); The two electrodes (2) are located at the two ends of the frame (1); The rib grid (3) includes a first grid part (4) and a second grid part (5), the first grid part (4) is located in the middle of the grid, and the second grid part (5) is located on both sides of the first grid part (4); The grid density of the first grid section (4) is greater than the grid density of the second grid section (5); The first grid section (4) is composed of horizontal ribs (31) and diagonal ribs (32); The second grid section (5) is composed of horizontal ribs (31) and vertical ribs (33); The rib mesh (3) also includes multiple mesh levels (30), and the mesh density and the number of current conduction paths of the multiple mesh levels (30) change in a gradient from the center of the rib mesh (3) to both sides.

2. The novel structural grating according to claim 1, characterized in that, The frame (1) is also provided with reinforcing ribs (6); The reinforcing rib (6) is located in the middle of the grid, and the two ends of the reinforcing rib (6) are connected to the frame (1); The first mesh portion (4) and the second mesh portion (5) are symmetrically arranged on both sides of the reinforcing rib (6).

3. The novel structural plate grid according to claim 2, characterized in that, in, The number of horizontal ribs (31) in the first grid section (4) is the same as the number of horizontal ribs (31) in the second grid section (5), and the number of oblique ribs (32) is twice the number of vertical ribs (33).

4. The novel structural grid according to claim 3, characterized in that, The diagonal ribs (32) and the transverse ribs (31) intersect to form a V-shaped grid; The vertical ribs (33) and horizontal ribs (31) intersect to form a grid.

5. The novel structural grid according to claim 4, characterized in that, The V-shaped structure formed by the inclined rib (32) opens toward the reinforcing rib (6).

6. The novel structural plate grid according to claim 3, characterized in that, The width of the inclined reinforcing bar (32) is smaller than the width of the vertical reinforcing bar (33).

7. The novel structural grid according to claim 2, characterized in that, The first mesh portion (4) and the second mesh portion (5) located on the same side of the reinforcing rib (6) have the same proportion.

8. The novel structural grating according to claim 1, characterized in that, The first grid portion (4) and the second grid portion (5) in the rib mesh (3) have the same proportion.

9. The novel structural grating according to claim 1, characterized in that, The two tabs (2) are symmetrically arranged with respect to the center point of the grid.

10. The novel structural grating according to claim 1, characterized in that, The frame (1), the tabs (2), and the rib grid (3) are integrally formed.

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