Grid for light-weight high-energy storage battery

Abstract

The invention discloses a grid for a lightweight high-energy storage battery, and relates to the technical field of battery grids. A plate grid for a lightweight high-energy storage battery comprises a working area defined by a top frame part, a first side frame part, a bottom frame part and a second side frame part, and the working area is internally provided with a net-shaped part connected with the top frame part, the first side frame part, the bottom frame part and the second side frame part, a transverse grid line part forming the plate grid and a vertical grid line part; the tab is connected to the top frame part; the blank area is positioned between the transverse grid line part and the vertical grid line part and is used for storing electrochemical active paste; according to the grid disclosed by the invention, at least one decrement connecting part is arranged on the transverse grid line part or the vertical grid line part or the transverse grid line part and the vertical grid line part, so that the transverse grid line part and the vertical grid line part are disconnected in time when the grid is lengthened when being corroded; and thus, short circuit caused by contact with the negative plate grid or the positive plate grid due to the growth is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery grids, and more specifically, relates to a grid for a lightweight high-energy energy storage battery. Background Art

[0002] Lead-acid batteries usually include multiple energy storage units. For example, a 12-volt battery may include 6 units, each unit providing 2 volts. Each unit includes one or more positive electrodes or plates and one or more negative electrodes or plates. An electrolyte (an acid such as dilute sulfuric acid) is also added to the unit to facilitate the chemical reactions that occur within the unit during battery charging and discharging; Both the positive and negative electrodes include grids made of lead or a lead alloy (such as a lead-calcium alloy), and the active material is coated thereon in a paste form; The grid has several horizontal and vertical rib grid lines. Between the horizontal and vertical rib grid lines, it mainly bears the active material and increases the reaction area of the active material. Among them, the vertical rib grid lines also have the function of conducting current; During the use of the grid, the plates will be corroded, resulting in the growth of the grid lines after breaking and the occurrence of a short-circuit problem due to the contact between the positive and negative electrodes; As in the prior art, publication number: CN103500837B, publication date: February 01, 2019, titled Battery Grid, discloses that the frame includes a top element, a bottom element, a first side element, and a second side element. The battery grid further includes a plurality of lines disposed within the frame that define a plurality of open areas and a current collector tab extending from the top element in a first direction. The battery grid further includes at least one feature disposed on the battery grid to reduce the growth in the first direction of the battery grid during its service life due to its corrosion; This prior art solves the problem of how to avoid the short-circuit problem caused by the contact between the positive and negative electrodes after the grid is corroded and grows. However, while solving the above problems, it is also necessary to consider the strength of the grid itself and the performance of the adhesion between the active material and the grid. Therefore, a grid for a lightweight high-energy energy storage battery is proposed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a grid for a lightweight high-energy energy storage battery that can overcome the above problems or at least partially solve the above problems.

[0004] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A grid for a lightweight high-energy energy storage battery, comprising: a working area surrounded by a top border part, a first side border part, a bottom border part, and a second side border part, wherein a mesh part connected to the top border part, the first side border part, the bottom border part, and the second side border part is arranged in the working area to form a horizontal grid line part and a vertical grid line part of the grid; a tab, connected to the top border part; a blank area, located between the horizontal grid line part and the vertical grid line part for storing an electrochemically active paste; a reduction connection part, arranged in the grid to reduce the growth occurring after the corrosion of the grid, and the reduction connection part extends into the blank area with a flank.

[0005] Preferably, the reduction connection part includes a diamond connection part connected between grid line one and grid line two. The diamond connection part includes two first side edges one and first side edges two respectively connected to grid line one and grid line two. The first side edges one and first side edges two are connected to form a node part, and the node part extends into the blank area to form a flank. A diamond blank is formed between the first side edges one and first side edges two, and the widths of the first side edges one and first side edges two are smaller than those of grid line one and grid line two.

[0006] Preferably, a first middle grid line is arranged in the diamond blank. The first middle grid line is perpendicular to grid line one and grid line two and forms two first triangular parts.

[0007] Preferably, a second middle grid line is arranged in the diamond blank. The second middle grid line is horizontally arranged with grid line one and grid line two and forms two second triangular parts.

[0008] Preferably, the reduction connection part includes a hexagonal connection part connected between grid line one and grid line two. The hexagonal connection part includes two second side edges one and second side edges two respectively connected to grid line one and grid line two. A second side edge three is connected between the second side edges one and second side edges two. The second side edge three extends into the blank area to form a flank. A hexagonal blank is formed among the second side edges one, second side edges two, and second side edge three, and the widths of the second side edges one, second side edges two, and second side edge three are smaller than those of grid line one and grid line two.

[0009] Preferably, the length of the second side edge one is L1, the length of the second side edge two is L2, and the length of the second side edge three is L3. L1 = L2 = L3.

[0010] Preferably, the length of the second side edge one is L1, the length of the second side edge two is L2, and the length of the second side edge three is L3. L1 = L2, L3 = 3 * L1.

[0011] Preferably, the reduced connection part includes a strip-shaped connection part connected between the first grid line and the second grid line. The strip-shaped connection part is symmetrically provided with long strip spaces, so that the strip-shaped connection part forms a middle grid line point located between the two long strip spaces, and third side edges respectively located on one side of the two long strip spaces. The strip-shaped connection part is arched; the widths of the middle grid line point and the third side edges are smaller than those of the first grid line and the second grid line.

[0012] Preferably, the horizontal grid line part and the vertical grid line part are wavy.

[0013] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art: In the present invention, the grid plate is provided with at least one reduced connection part on the horizontal grid line part or the vertical grid line part or the horizontal grid line part and the vertical grid line part, so as to timely disconnect the horizontal grid line part and the vertical grid line part when the grid plate grows during corrosion, thereby preventing short circuits caused by contact with the negative grid plate or the positive grid plate due to growth; The designed shape of the reduced connection part can also avoid the decrease in the strength of the grid plate caused by the setting of the reduced connection part while solving the problem of reducing short circuits; In addition, the designed shape of the reduced connection part can also absorb or change the direction of part of the stress caused by the growth of the grid plate, thereby improving the service performance of the grid plate, and while increasing the strength of the grid plate, enabling the growth of the grid plate to be interrupted at the reduced connection part; At the same time, the design of the reduced connection part can also make the grid plate have a lightweight effect; Moreover, the design of the reduced connection part can also increase the space for storing the electrochemically active paste, thereby increasing the capacity of the electrochemically active paste, increasing the battery energy storage and improving the battery performance; Secondly, the provided reduced connection part also has flanks that can extend into the space area for storing the electrochemically active paste. The setting of the flanks can enhance the bonding force and adhesion between the electrochemically active paste and the grid plate compared with the prior art. And when there is current passing through the flanks to transmit current, the current generated by the reaction of the electrochemically active paste can be more effectively collected on the vertical grid line part and conducted to the tab, thus ensuring the reaction area of the electrochemically active paste, enhancing the bonding force between the grid plate and the electrochemically active paste and the strength of the electrochemically active paste, and improving the electrical conductivity of the grid plate.

[0014] The following further describes in detail the specific embodiments of the present invention with reference to the drawings. Description of the Drawings

[0015] In the drawings: Figure 1 is a schematic structural diagram of a grid plate for a lightweight high-energy energy storage battery proposed by the present invention; Figure 2 Structural schematic diagram of the diamond-shaped connecting part of the grid for a lightweight high-energy energy storage battery proposed by the present invention; Figure 3 Structural schematic diagram of the first middle grid line of the grid for a lightweight high-energy energy storage battery proposed by the present invention; Figure 4 Structural schematic diagram of the second middle grid line of the grid for a lightweight high-energy energy storage battery proposed by the present invention; Figure 5 Structural schematic of the hexagonal connecting part of the grid for a lightweight high-energy energy storage battery proposed by the present invention Figure 1 ; Figure 6 Structural schematic of the hexagonal connecting part of the grid for a lightweight high-energy energy storage battery proposed by the present invention Figure 2 ; Figure 7 Structural schematic diagram of the strip-shaped connecting part of the grid for a lightweight high-energy energy storage battery proposed by the present invention; Figure 8 Structural schematic diagram when the strip-shaped connecting part is arched.

[0016] In the figure: 1. Grid; 11. Ear; 12. Top border part; 13. Bottom border part; 14. First side border part; 15. Second side border part; 2. Mesh part; 21. Horizontal grid line part; 22. Vertical grid line part; 23. Connection point; 24. Space area; 10. Reduction connection part; 101. Grid line one; 102. Grid line two; 103. Diamond-shaped connecting part; 1031. First side one; 1032. First side two; 1033. Node part; 1034. Diamond-shaped space; 1035. First middle grid line; 10351. First triangular part; 1036. Second middle grid line; 10361. Second triangular part; 203. Hexagonal connecting part; 2031. Second side one; 2032. Second side two; 2033. Second side three; 2034. Hexagonal space; 303. Strip-shaped connecting part; 3031. Long strip space; 3032. Third side; 3033. Middle grid line point. Specific embodiments

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0018] The following is combined with the attached Figure 1 - Attached Figure 8, the technical solutions provided by each embodiment of the present invention will be described in detail.

[0019] The grid 1 can be a positive or negative grid and can be manufactured by any known method (such as by casting, by stretching after punching sheet materials, by continuous stamping processes, etc.) using any known materials (such as lead or lead alloys such as lead-calcium alloys).

[0020] Embodiment 1: Refer to Figures 1-8 , a grid for a lightweight high-energy energy storage battery, comprising: a working area surrounded by a top border part 12, a first side border part 14, a bottom border part 13, and a second side border part 15, and a mesh part 2 connected to the top border part 12, the first side border part 14, the bottom border part 13, and the second side border part 15 is arranged in the working area to form a horizontal grid line part 21 and a vertical grid line part 22 of the grid 1, and connection points 23 are formed at the intersections of the horizontal grid line part 21 and the vertical grid line part 22; a tab 11 connected to the top border part 12; a blank area 24 located between the horizontal grid line part 21 and the vertical grid line part 22 for storing electrochemically active paste; a reduction connection part 10 arranged in the grid 1 for reducing the growth that occurs after the grid 1 is corroded, and the reduction connection part 10 extends into the blank area 24 with flanks; By arranging at least one reduction connection part 10 on the horizontal grid line part 21 or the vertical grid line part 22 or both the horizontal grid line part 21 and the vertical grid line part 22 of the grid 1, when the grid 1 grows due to corrosion, the horizontal grid line part 21 and the vertical grid line part 22 can be disconnected in time, thereby preventing a short circuit caused by contact with the negative grid 1 or the positive grid 1 due to growth; Moreover, the designed shape of the reduction connection part 10 can, while solving the problem of reducing short circuits, avoid a decrease in the strength of the grid 1 due to the arrangement of the reduction connection part 10; In addition, the designed shape of the reduction connection part 10 can also absorb or change the direction of part of the stress caused by the growth of the grid 1, thereby improving the service performance of the grid 1, and while increasing the strength of the grid 1, enabling the growth of the grid 1 to be interrupted at the reduction connection part 10; At the same time, the design of the reduction connection part 10 can also make the grid 1 have a lightweight effect; And, the design of the reduction connection part 10 can also increase the space for storing electrochemically active paste, thereby increasing the capacity of the electrochemically active paste, increasing the battery energy storage, and improving the battery performance; Secondly, the provided reduced connection portion 10 also has a flank that can extend into the space area 24 storing the electrochemically active paste. The setting of this flank can enhance the bonding force and adhesion between the electrochemically active paste and the grid 1 compared with the prior art. When there is current passing through the flank to transmit the current, the current generated by the reaction of the electrochemically active paste can be more effectively collected on the vertical grid line portion 22 and conducted to the tab 11. Therefore, the reaction area of the electrochemically active paste is ensured, the bonding force between the grid 1 and the electrochemically active paste and the strength of the electrochemically active paste are enhanced, and the electrical conductivity of the grid 1 is improved.

[0021] Example 2: Refer to Figures 2-4 , a grid for a lightweight high-energy energy storage battery, which is basically the same as that in Example 1. Further, the reduced connection portion 10 includes a rhombic connection portion 103 connected between the first grid line 101 and the second grid line 102. The rhombic connection portion 103 includes two first side edges 1031 and 1032 respectively connected to the first grid line 101 and the second grid line 102. The first side edges 1031 and 1032 are connected to form a node portion 1033. The node portion 1033 extends into the space area 24 to form a flank. A rhombic space 1034 is formed between the first side edges 1031 and 1032. The widths of the first side edges 1031 and 1032 are smaller than those of the first grid line 101 and the second grid line 102; The first grid line 101 and the second grid line 102 are the horizontal grid line portion 21 or the vertical grid line portion 22; When the grid 1 is corroded and grows, the first side edges 1031 and 1032 with widths smaller than those of the horizontal grid line portion 21 and the vertical grid line portion 22 will break, so that the top border portion 12 of the grid 1 cannot grow and is interrupted; Secondly, the first side edges 1031 and 1032 can increase the strength of the horizontal grid line portion 21 or the vertical grid line portion 22, and the rhombic connection portion 103 in a rhombic shape is used to enhance the strength of the grid 1; In addition, due to the setting of the rhombic structure, when the grid 1 is corroded and grows, it can also elongate correspondingly to absorb or change the direction of part of the stress caused by the growth of the grid 1, thereby improving the service performance of the grid 1; The rhombic space 1034 formed in the rhombic connection portion 103 can be used to increase the capacity of the electrochemically active paste; Influenced by the rhombic shape characteristics, the node portion 1033 will extend into the space area 24 to form a flank, thereby improving the bonding force and adhesion with the electrochemically active paste.

[0022] Refer to Figure 3, a first central grid line 1035 can be arranged in the diamond-shaped space 1034. The first central grid line 1035 is perpendicularly arranged with the first grid line 101 and the second grid line 102 and forms two first triangular parts 10351; The formation of the two first triangular parts 10351 can further improve the strength of the horizontal grid line part 21 and the vertical grid line part 22, and further avoid the problem that the reduced connection part 10 is easily disconnected under the weak corrosion state of the grid 1.

[0023] Refer to Figure 4 , a second central grid line 1036 can be arranged in the diamond-shaped space 1034. The second central grid line 1036 is horizontally arranged with the first grid line 101 and the second grid line 102 and forms two second triangular parts 10361; The formation of the two second triangular parts 10361 can further improve the strength of the horizontal grid line part 21 and the vertical grid line part 22, and further avoid the problem that the reduced connection part 10 is easily disconnected under the weak corrosion state of the grid 1. At the same time, it can also maintain the absorption of stress when the grid 1 corrodes and grows.

[0024] Example 3: Refer to Figure 5 , Figure 6 , a grid for a lightweight high-energy energy storage battery is basically the same as that in Example 1. Further, the reduced connection part 10 includes a hexagonal connection part 203 connected between the first grid line 101 and the second grid line 102. The hexagonal connection part 203 includes two second side edges one 2031 and second side edges two 2032 respectively connected to the first grid line 101 and the second grid line 102. A second side edge three 2033 is connected between the second side edges one 2031 and the second side edges two 2032. The second side edge three 2033 extends towards the space area 24 to form a flank. A hexagonal space 2034 is formed between the second side edges one 2031, the second side edges two 2032 and the second side edge three 2033. The widths of the second side edges one 2031, the second side edges two 2032 and the second side edge three 2033 are smaller than those of the first grid line 101 and the second grid line 102; In the hexagonal connection part 203 of this embodiment, when the grid 1 corrodes and grows, when the second side edges one 2031, the second side edges two 2032 and the second side edge three 2033 with widths smaller than those of the horizontal grid line part 21 and the vertical grid line part 22 are disconnected on both sides, it will cause the top border part 12 of the grid 1 to be unable to grow and interrupt, thereby avoiding the occurrence of a short-circuit problem; Among them, the second side edges one 2031, the second side edges two 2032 and the second side edge three 2033 can increase the strength of the horizontal grid line part 21 and the vertical grid line part 22, and the hexagonal connection part 203 can be used to enhance the strength of the grid 1; Due to the hexagonal structure, when the grid 1 corrodes and grows, it can also elongate accordingly to absorb or change the direction of part of the stress caused by the growth of the grid 1; The hexagonal spaces 2034 formed in the hexagonal connection part 203 can be used to increase the capacity of the electrochemically active paste; Influenced by the shape characteristics of the hexagonal connection part 203, the second side three 2033 will extend into the space area 24 to form a flank, thereby improving the bonding force and adhesion with the electrochemically active paste.

[0025] Refer to Figure 5 , the length of the first side of the second side 2031 is L1, the length of the second side of the second side 2032 is L2, and the length of the third side of the second side 2033 is L3, L1 = L2 = L3.

[0026] Refer to Figure 6 , the length of the first side of the second side 2031 is L1, the length of the second side of the second side 2032 is L2, and the length of the third side of the second side 2033 is L3, L1 = L2, L3 = 3 * L1. The lengthening of the second side three 2033 can increase the area extended by the second side three 2033 into the space area 24, thereby improving the bonding force and adhesion between the electrochemically active paste and the grid 1; Secondly, the extension of the second side three 2033 can be more easily disconnected after the grid 1 corrodes, thereby preventing the growth of the grid plate 1.

[0027] Example 4: Refer to Figure 7 , Figure 8 , a grid for a lightweight high-energy energy storage battery is basically the same as that in Example 1. Furthermore: the reduced connection part 10 includes a strip-shaped connection part 303 connected between the grid line one 101 and the grid line two 102. The strip-shaped connection part 303 is symmetrically provided with long strip spaces 3031, and the strip-shaped connection part 303 is formed with a central grid line point 3033 located between the two long strip spaces 3031, and third sides 3032 respectively located on one side of the two long strip spaces 3031. The strip-shaped connection part 303 is arched; the widths of the central grid line point 3033 and the third sides 3032 are smaller than those of the grid line one 101 and the grid line two 102; In this embodiment, by forming third sides 3032 on both sides of the central grid line point 3033, the strength of the horizontal grid line part 21 and the vertical grid line part 22 after the reduced connection part 10 is provided is improved; Secondly, the strip-shaped connecting portion 303 is arched, which enables the electrochemical active paste in the blank areas 24 on both sides of the strip-shaped connecting portion 303 to be connected by the arch, and the electrochemical active paste in the long strip blank 3031 can also be connected to the electrochemical active paste in the arch, thereby improving the bonding force and adhesion between the electrochemical active paste and the grid 1; Secondly, the arched strip-shaped connecting portion 303 can also absorb or change the direction of part of the stress caused by the growth of the grid 1 when the grid 1 grows, thereby improving the service performance of the grid 1.

[0028] Embodiment 5: A grid for a lightweight high-energy energy storage battery is basically the same as Embodiments 2, 3, and 4. Furthermore: the horizontal grid lines 21 and the vertical grid lines 22 are wavy; This enables the grid 1 to increase the contact area with the electrochemical active paste and improve the overall strength of the grid 1 at the same time.

[0029] The manufacturing of the reduced connection portion 10 can be efficiently achieved by stamping.

[0030] It should be noted that although the above improvements to the grid 1 are discussed independently, one or more such improvements can be adopted in a single grid 1. For example, in a single grid 1, a diamond-shaped connecting portion 103 (for example, as Figure 2 shown) and a hexagonal connecting portion 203 (for example, as Figure 5 shown) can be adopted simultaneously.

[0031] The mesh portion 2 in the grid 1, that is, the shapes of the horizontal grid lines 21 and the vertical grid lines 22, can also adopt the grid shapes in the prior art mentioned in the background art of the specification; At the same time, the notch technical solutions in the prior art mentioned in the background art of the specification can also be adopted on the top border portion 12, the first side border portion 14, the bottom border portion 13, and the second side border portion 15 to further avoid short circuits caused by grid 1 corrosion after growth.

[0032] The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content as equivalent embodiments of equivalent changes within the scope of the technical solution of the present invention. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A grid for a lightweight high-energy energy storage battery, characterized in that, Comprising: A working area is enclosed by a top border part (12), a first side border part (14), a bottom border part (13), and a second side border part (15). A mesh part (2) connected to the top border part (12), the first side border part (14), the bottom border part (13), and the second side border part (15) is arranged in the working area to form a horizontal grid line part (21) and a vertical grid line part (22) of the grid plate (1). A tab (11) is connected to the top border part (12). A blank area (24) is located between the horizontal grid line part (21) and the vertical grid line part (22) for storing an electrochemically active paste. A reduction connection part (10) is arranged in the grid plate (1) to reduce the growth occurring after the corrosion of the grid plate (1). The reduction connection part (10) extends into the blank area (24) with a flank.

2. The grid for a lightweight high-energy energy storage battery according to claim 1, wherein, The reduction connection part (10) includes a diamond connection part (103) connected between a first grid line (101) and a second grid line (102). The diamond connection part (103) includes two first side edges one (1031) and first side edges two (1032) respectively connected to the first grid line (101) and the second grid line (102). The first side edges one (1031) and the first side edges two (1032) are connected to form a node part (1033). The node part (1033) extends into the blank area (24) to form a flank. A diamond blank (1034) is formed between the first side edges one (1031) and the first side edges two (1032). The widths of the first side edges one (1031) and the first side edges two (1032) are smaller than those of the first grid line (101) and the second grid line (102).

3. The grid for a lightweight high-energy energy storage battery according to claim 2, characterized in that, A first middle grid line (1035) is arranged in the diamond blank (1034). The first middle grid line (1035) is perpendicularly arranged with respect to the first grid line (101) and the second grid line (102) and forms two first triangular parts (10351).

4. The grid for a lightweight high-energy energy storage battery according to claim 2, wherein, A second middle grid line (1036) is arranged in the diamond blank (1034). The second middle grid line (1036) is horizontally arranged with respect to the first grid line (101) and the second grid line (102) and forms two second triangular parts (10361).

5. The grid for a lightweight high-energy energy storage battery according to claim 1, wherein, The reduction connection part (10) includes a hexagonal connection part (203) connected between a first grid line (101) and a second grid line (102). The hexagonal connection part (203) includes two second side edges one (2031) and second side edges two (2032) respectively connected to the first grid line (101) and the second grid line (102). A second side edge three (2033) is connected between the second side edges one (2031) and the second side edges two (2032). The second side edge three (2033) extends into the blank area (24) to form a flank. A hexagonal blank (2034) is formed among the second side edges one (2031), the second side edges two (2032), and the second side edge three (2033). The widths of the second side edges one (2031), the second side edges two (2032), and the second side edge three (2033) are smaller than those of the first grid line (101) and the second grid line (102).

6. The grid for a lightweight high-energy energy storage battery according to claim 5, characterized in that, The length of the first second side (2031) is L1, the length of the second second side (2032) is L2, and the length of the third second side (2033) is L3. L1 = L2 = L3.

7. The grid for a lightweight high-energy energy storage battery according to claim 5, characterized in that, The length of the first second side (2031) is L1, the length of the second second side (2032) is L2, and the length of the third second side (2033) is L3. L1 = L2, L3 = 3 * L1.

8. The grid for a lightweight high-energy energy storage battery according to claim 1, characterized in that, The reduced connection part (10) includes a strip-shaped connection part (303) connected between the first gate line (101) and the second gate line (102). Long strip-shaped spaces (3031) are symmetrically opened on the strip-shaped connection part (303), so that the strip-shaped connection part (303) forms a central gate line point (3033) located between the two long strip-shaped spaces (3031), and third sides (3032) respectively located on one side of the two long strip-shaped spaces (3031). The strip-shaped connection part (303) is arched. The widths of the central gate line point (3033) and the third side (3032) are smaller than those of the first gate line (101) and the second gate line (102).

9. A grid for a lightweight high-energy energy storage battery according to claim 3 or 4 or 6 or 7 or 8, characterized in that The horizontal gate line part (21) and the vertical gate line part (22) are wavy.

Images