Central compact tab grid structure of valve-regulated lead-acid storage battery and manufacturing method of central compact tab grid structure

Abstract

The invention discloses a valve-regulated lead-acid storage battery central compact tab grid structure and a manufacturing method thereof, and belongs to the technical field of lead-acid storage batteries, the valve-regulated lead-acid storage battery central compact tab grid structure comprises a grid main body, and further comprises an outer frame and a positioning assembly, the positioning assembly is mounted on the inner side of the outer frame, the grid main body is located on the inner side of the outer frame and connected with one end of the positioning assembly, and the other end of the positioning assembly is connected with the valve-regulated lead-acid storage battery central compact tab grid structure. The top of the grid main body is provided with a tab, the tab is arranged at the center of the grid main body, the grid main body is provided with a main current collecting strip downwards from the center of the tab, and the joint of the tab and the main current collecting strip is provided with a reinforcing rib. And the distance between the positive tab and the negative tab is optimized to 3 + / -0.2 mm, so that a series of technical problems existing in the traditional grid main body design are successfully solved, a new technical path is provided for the performance improvement of the valve-regulated lead-acid storage battery, and higher energy density and better electrical performance are realized at the same time.

Description

Technical Field

[0001] This invention relates to the field of lead-acid battery technology, specifically to a valve-regulated lead-acid battery with a centrally compact tab grid structure and its manufacturing method. Background Technology

[0002] Valve-regulated lead-acid batteries, as a mature energy storage device, are widely used in communication base station backup power, uninterruptible power supply (UPS) systems, electric vehicles, photovoltaic energy storage, and other fields. In lead-acid batteries, the grid serves as the conductive framework and mechanical support for the plates, and its structural design directly affects the battery's electrochemical performance, cycle life, and reliability. However, in existing technologies, the grid design of valve-regulated lead-acid batteries mainly adopts a side-mounted tab arrangement. Generally, the positive and negative tabs are located on the left or right side of the top of the grid, used to connect the internal busbar of the battery and serve as the channel for current to enter and exit the plates. However, the side-mounted tab design has the following obvious drawbacks:

[0003] The current distribution is severely uneven: because the tab is located on one side of the upper end of the grid, the current is asymmetrically distributed in the plate, resulting in uneven utilization of the active material of the plate.

[0004] Uneven grid corrosion: During charge-discharge cycles, the corrosion rate in high current density areas is significantly faster than that in low current density areas. This uneven corrosion becomes the main factor limiting battery life.

[0005] Local hot spot effect: More Joule heat is generated in the current concentration area, the temperature rises, and the temperature near the electrode can be higher than that at the far end, thereby accelerating grid corrosion and active material shedding;

[0006] Asymmetrical stacking of positive and negative plates: The side tab design makes it impossible to achieve a completely symmetrical arrangement of positive and negative plates, which increases the complexity of battery assembly and is not conducive to automated production and consistency control.

[0007] Low space utilization efficiency: The side tab design results in low space utilization between the plates, which limits the energy density of the battery;

[0008] Increased internal resistance: The current has a longer path from the side tabs through the entire plate, which increases the battery's internal resistance and affects high-rate discharge performance. Moreover, since the distance between the positive and negative tabs needs to be kept relatively large (usually more than 5mm) to avoid the risk of short circuit, the space and electrical performance advantages of the central tab design are not fully utilized.

[0009] According to announcement number CN113437304A, a battery grid with offset tabs is proposed, including a rectangular frame and four diagonal ribs. The first diagonal rib has its ends at the center line of the upper frame corresponding to the tab and the bottom corner of the frame away from the tab, respectively. The second diagonal rib has its ends at the center line of the upper frame corresponding to the tab and the bottom corner of the frame near the tab, respectively. The third diagonal rib has its ends at the center line of the upper frame corresponding to the tab and the bottom edge of the frame, respectively, and is offset towards the first diagonal rib. The fourth diagonal rib is perpendicular to the first diagonal rib, with one endpoint intersecting the top corner of the frame away from the tab, and the other endpoint intersecting the first diagonal rib. This invention addresses the characteristics of a tab-biased grid by introducing four diagonal ribs on top of the traditional equally spaced horizontal and vertical rib design. This results in good overall mechanical performance and resistance to deformation. The diagonal ribs ensure current conduction in the three corner areas away from the tab, helping to improve the uniformity of the overall current density distribution and the utilization rate of the active material in the grid.

[0010] As described above, the tabs on the grid are located on the side. Therefore, during battery use, the current distribution in the grid structure is uneven, resulting in excessively long current distribution time, which increases the battery's internal resistance and affects high-rate discharge performance. During recharge and discharge cycles, the uneven current distribution leads to uneven local heat distribution on the grid, resulting in uneven corrosion on the grid surface. This accelerates the shedding of active material from the grid. The asymmetrical position of the grid tabs increases the complexity of battery assembly and reduces the internal space utilization of the battery, thus limiting the battery's energy density. To solve the above problems, an improved valve-regulated lead-acid battery with a centrally compact tab grid structure and its manufacturing method are proposed. Summary of the Invention

[0011] The purpose of this invention is to provide a centrally compact tab grid structure for valve-regulated lead-acid batteries and its manufacturing method. By innovatively designing the tabs at the top center of the grid body and optimizing the distance between the positive and negative tabs to 3±0.2mm, a series of technical problems existing in the traditional grid body design are successfully solved, providing a new technical path for improving the performance of valve-regulated lead-acid batteries, while achieving higher energy density and better electrical performance, thus solving the problems mentioned in the background art.

[0012] To achieve the above objectives, the present invention provides the following technical solution: a centrally compact tab grid structure for a valve-regulated lead-acid battery, comprising a grid body, an outer frame, and a positioning component. The positioning component is installed inside the outer frame, and the grid body is located inside the outer frame and connected to one end of the positioning component. A tab is installed on the top of the grid body, and the tab is located at the center of the grid body. A main current collector is arranged downward from the center of the tab on the grid body. A reinforcing rib is provided at the connection between the tab and the main current collector. The reinforcing rib is arranged in a herringbone shape. A busbar is ultrasonically welded to the top of the tab. A partition is provided between two adjacent grid bodies, and the spacing between the tabs on two adjacent grid bodies is set to be between 3 ± 0.2 mm.

[0013] Preferably, the main collector strip gradually tapers from top to bottom, the cross-section of the main collector strip is trapezoidal, and the edge of the top of the electrode tab is arc-shaped.

[0014] Preferably, the main body of the grid includes a frame, horizontal grid strips, and vertical grid strips. The horizontal grid strips are arranged parallel to the upper and lower edges of the inner side of the frame, and the vertical grid strips are arranged parallel to the left and right edges of the inner side of the frame. The horizontal and vertical grid strips are distributed in a grid pattern. The main flow collector is located at the center of the intersection of the horizontal and vertical grid strips. The lower end of the reinforcing rib is installed at the center of the upper end of the frame and connected to the upper end of the main flow collector. The corners of the outer side of the frame are rounded. The outer side of the frame is connected to the positioning component.

[0015] Preferably, the spacing between adjacent horizontal grid strips is between 16±0.5mm, and the spacing between adjacent vertical grid strips is between 16±0.5mm.

[0016] Preferably, the edges of the main flow collector strip are rounded, and the radius of the rounded edges of the main flow collector strip is 1.0±0.1mm.

[0017] Preferably, there are gaps between the intersecting positions of the horizontal and vertical grid strips, and reinforcing ribs are provided in the gaps.

[0018] Preferably, a protrusion is provided at the center of the top of the electrode tab, and the surface of the protrusion is connected to the lower surface of the busbar.

[0019] Preferably, the outer frame includes two horizontal bars and two vertical bars. The two ends of the vertical bars are arc-shaped and are provided with fixing rods at both ends. The two ends of the horizontal bars are provided with fixing holes at positions corresponding to the fixing rods. The vertical bars are fixed by inserting the fixing rods into the fixing holes of the horizontal bars. The upper end of the reinforcing rib is installed on the upper horizontal bar.

[0020] Preferably, the positioning component includes a positioning post and a positioning hole. The positioning post is fixed around the inner sides of the horizontal and vertical bars. The positioning hole is opened on the outer side wall of the frame and corresponds to the position of the positioning post. One end of the positioning post is inserted into the positioning hole.

[0021] Based on the above-described valve-regulated lead-acid battery central compact tab grid structure, the present invention also provides a method for manufacturing the central compact tab grid structure of a valve-regulated lead-acid battery, comprising the following steps:

[0022] Step 1: According to the requirements of the grating structure, the alloy material is made into a frame using a mold, and then the corners on the outside of the frame are rounded.

[0023] Step Two: Next, install the horizontal grid strips parallel to the upper and lower edges of the inner side of the frame, and the vertical grid strips parallel to the left and right edges of the inner side of the frame, so that they are distributed in a crisscross pattern. The spacing between adjacent horizontal grid strips should be controlled at 16±0.5mm, and the spacing between adjacent vertical grid strips should also be controlled at 16±0.5mm. Reinforcing ribs should be installed in the spaces where the horizontal and vertical grid strips intersect. At the same time, a main flow collector strip should be installed at the center of the intersection of the horizontal and vertical grid strips. The main flow collector strip gradually tapers from top to bottom, has a trapezoidal cross-section, and rounded corners with a radius of 1.0±0.1mm.

[0024] Step 3: Then install the electrode lug at the top center of the main body of the grid, set the protrusion at the top center, and install the herringbone-shaped reinforcing rib at the connection between the electrode lug and the main collector bar. The lower end of the reinforcing rib is installed at the center of the upper end of the frame and connected to the upper end of the main collector bar. The upper end of the reinforcing rib is installed on the outer frame.

[0025] Step 4: Finally, install the finished grid body on the inside of the outer frame using the positioning component, so that the grid body is connected to one end of the positioning component, and install a partition between two adjacent grid bodies. Use ultrasonic welding to weld the busbar to the top of the tab, so that the surface of the protrusion is connected to the lower surface of the busbar, which can improve the contact area with the busbar.

[0026] Step 5: Stack the main grid components together and control the spacing between the tabs to within 3±0.2mm. This completes the central compact tab grid structure of the valve-regulated lead-acid battery.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. This invention provides a centrally compact tab grid structure for a valve-regulated lead-acid battery and its manufacturing method. By designing the tabs at the top center of the grid and optimizing the spacing between adjacent positive and negative tabs to 3±0.2mm, the current distribution becomes extremely uniform, saving current distribution time. This reduces the battery's internal resistance and minimizes its impact on high-rate discharge performance. Simultaneously, the added main current collector ensures uniform current distribution during recharge-discharge cycles, slowing down the shedding rate of active material from the grid body and reducing the corrosion of the grid body. This extends the grid body's lifespan and improves space utilization efficiency, thereby increasing the battery's energy density.

[0029] 2. This invention provides a centrally compact tab grid structure for a valve-regulated lead-acid battery and its manufacturing method. By setting the cross-section of the main current collector strip into a trapezoidal shape and setting the radius of its edge fillet to 1.0±0.1mm, stress concentration is further reduced, and it can adapt to a more compact electrode spacing. Since the positive and negative tabs on the grid body of the positive and negative plates are both set at the center, it not only improves the efficiency of battery assembly, but also improves the compatibility of automated production and production efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is an exploded view of the structural plate grid body of the present invention;

[0032] Figure 3 This is an exploded view of the structure of the plate grid body, outer frame, and positioning components of the present invention;

[0033] Figure 4 This is an exploded view of the outer frame structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the horizontal and vertical grid strip structures of the present invention.

[0035] The following are the labeling elements in the diagram: 1. Main body of the grid; 101. Frame; 102. Horizontal grid strip; 103. Vertical grid strip; 104. Space; 105. Reinforcing rib; 2. Outer frame; 21. Horizontal bar; 22. Vertical bar; 23. Fixing rod; 24. Fixing hole; 3. Positioning assembly; 31. Positioning post; 32. Positioning hole; 4. Electrode; 5. Main manifold strip; 6. Reinforcing rib; 7. Busbar; 8. Partition; 9. Protrusion. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] This invention provides, for example Figures 1-5 The diagram illustrates a centrally compact tab grid structure for a valve-regulated lead-acid battery. It includes a grid body 1, an outer frame 2, and a positioning assembly 3. The positioning assembly 3 is installed inside the outer frame 2. The grid body 1 is located inside the outer frame 2 and connected to one end of the positioning assembly 3. A tab 4 is mounted on the top of the grid body 1, positioned at the center of the grid body 1. A main current collector 5 is arranged downwards from the center of the tab 4 on the grid body 1. A reinforcing rib 6 is provided at the connection between the tab 4 and the main current collector 5. During battery charging and discharging, the reinforcing rib 6 effectively disperses the stress at the connection, enhancing the stability of the connection between the tab 4 and the main current collector 5 and preventing breakage due to stress caused by current changes. The reinforcing rib 6 is arranged in a herringbone shape. A busbar 7 is ultrasonically welded to the top of the tab 4. Adjacent plates... A partition 8 is provided between the grid bodies 1. The spacing between the tabs 4 on two adjacent grid bodies 1 is set to 3±0.2mm. By designing the tabs 4 at the center of the top of the grid and optimizing the spacing between adjacent positive and negative tabs 4 to 3±0.2mm, the current distribution is extremely uniform, saving the time of current distribution. Therefore, the internal resistance of the battery is reduced, reducing the impact on high-rate discharge performance. At the same time, with the addition of the main current collector 5, the uniform current distribution during recharge and discharge cycles can slow down the rate of active material shedding on the grid body 1, reduce the corrosion of the grid body 1, and thus extend the service life of the grid body 1. It also improves the space utilization efficiency, increases the energy density of the battery, and solves the problem of uneven current distribution caused by traditional side tabs 4.

[0038] The main current collector 5 gradually tapers from top to bottom, and its cross-section is trapezoidal. The edge of the top of the tab 4 is arc-shaped, and the edge of the main current collector 5 is rounded. The radius of the rounded corner of the main current collector 5 is 1.0±0.1mm. The trapezoidal structure of the main current collector 5 can enhance its strength and conductivity. The rounded corner can reduce stress concentration, further promote uniform current distribution, improve the utilization rate of active material of the electrode plate, reduce grid corrosion, adapt to compact electrode spacing, and improve the overall performance and energy density of the battery.

[0039] The main body 1 of the grid includes a frame 101, horizontal grid strips 102 and vertical grid strips 103. The horizontal grid strips 102 are arranged parallel to the upper and lower edges of the inner side of the frame 101, and the vertical grid strips 103 are arranged parallel to the left and right edges of the inner side of the frame 101. The horizontal grid strips 102 and vertical grid strips 103 are arranged in a grid pattern with crisscrossing. The main flow collector 5 is located at the center of the intersection of the horizontal grid strips 102 and the vertical grid strips 103. The lower end of the reinforcing rib 6 is installed at the center of the upper end of the frame 101 and connected to the upper end of the main flow collector 5. The corners of the outer side of the frame 101 are rounded. The outer side of the frame 101 is connected to the positioning component 3. The spacing between adjacent horizontal grid strips 102 is between 16±0. The vertical grid bars 103 are spaced 16±0.5mm apart, with 5mm spacing between adjacent vertical grid bars 102 and vertical grid bars 103. Spaces 104 are formed between the staggered positions of horizontal grid bars 102 and vertical grid bars 103. Reinforcing ribs 105 are provided in the spaces 104. By aligning the horizontal grid bars 102 parallel to the upper and lower edges of the inner side of the frame 101 and the vertical grid bars 103 parallel to the left and right edges of the inner side of the frame 101, they are arranged in a grid pattern, which can provide mechanical support for the grid body 1. At the same time, as a path for current conduction, the reinforcing ribs 105 provided in the spaces 104 enhance the overall mechanical strength of the grid, enabling it to better withstand stress changes during battery charging and discharging, ensuring stable current conduction within the grid, and improving battery reliability and service life.

[0040] A protrusion 9 is provided at the center of the top of the tab 4. The surface of the protrusion 9 is connected to the lower surface of the busbar 7. The protrusion 9 is tightly connected to the lower surface of the busbar 7. Ultrasonic welding can achieve a good metal bond between the tab 4 and the busbar 7. The protrusion 9 increases the contact area between the two, reduces the contact resistance, and ensures efficient current transmission between the tab 4 and the busbar 7.

[0041] The outer frame 2 includes two horizontal bars 21 and two vertical bars 22. The two ends of the vertical bars 22 are rounded and fixed with rods 23 at both ends. The two ends of the horizontal bars 21 are provided with fixing holes 24 corresponding to the fixing rods 23. The vertical bars 22 are fixed by inserting the fixing rods 23 into the fixing holes 24 of the horizontal bars 21. The upper end of the reinforcing rib 6 is installed on the upper horizontal bar 21. The vertical bars 22 are fixed by inserting the fixing rods 23 into the fixing holes 24 of the horizontal bars 21. This facilitates the assembly of the outer frame 2 and provides an installation base for the positioning component 3 and the reinforcing rib 6, thereby enhancing the stability of the entire grid structure.

[0042] The positioning component 3 includes a positioning post 31 and a positioning hole 32. The positioning post 31 is fixed around the inner sides of the horizontal bar 21 and the vertical bar 22. The positioning hole 32 is opened on the outer side wall of the frame 101 and corresponds to the position of the positioning post 31. One end of the positioning post 31 is inserted into the positioning hole 32. Through the cooperation of the positioning post 31 and the positioning hole 32, the positioning post 31 cooperates with the positioning hole 32 on the outer side wall of the frame 101, which plays a precise positioning role, ensuring the correct installation position of the grid body 1 in the outer frame 2, enhancing the stability of the grid structure, providing a reliable foundation for the subsequent installation of other internal components of the battery, avoiding battery failure caused by unstable grid installation, and improving the overall reliability of the battery.

[0043] Based on the above-described valve-regulated lead-acid battery central compact tab grid structure, the present invention also provides a method for manufacturing the central compact tab grid structure of a valve-regulated lead-acid battery, comprising the following steps:

[0044] Step 1: According to the requirements of the plate grid structure, the alloy material is made into frame 101 through the mold, and then the corners of the outer perimeter of frame 101 are made into rounded corners.

[0045] Step Two: Next, install the horizontal grid strips 102 parallel to the upper and lower inner edges of the frame 101, and the vertical grid strips 103 parallel to the left and right inner edges of the frame 101, so that they are distributed in a crisscross pattern. The spacing between adjacent horizontal grid strips 102 is controlled at 16±0.5mm, and the spacing between adjacent vertical grid strips 103 is controlled at 16±0.5mm. Reinforcing ribs 105 are set in the spaces 104 at the intersection of the horizontal grid strips 102 and the vertical grid strips 103. At the same time, a main flow collector 5 is set at the center of the intersection of the horizontal grid strips 102 and the vertical grid strips 103. The main flow collector 5 gradually tapers from top to bottom, has a trapezoidal cross-section, and rounded corners with a radius of 1.0±0.1mm.

[0046] Step 3: Then install the electrode lug 4 at the top center of the grid body 1, set the protrusion 9 at the top center, and install the herringbone-shaped reinforcing rib 6 at the connection between the electrode lug 4 and the main collector bar 5. The lower end of the reinforcing rib 6 is installed at the center of the upper end of the frame 101 and connected to the upper end of the main collector bar 5. The upper end of the reinforcing rib 6 is installed on the outer frame 2.

[0047] Step 4: Finally, install the fabricated grid body 1 on the inner side of the outer frame 2 through the positioning component 3, so that the grid body 1 is connected to one end of the positioning component 3, and install the partition 8 between two adjacent grid bodies 1. Use ultrasonic welding to weld the busbar 7 to the top of the tab 4, so that the surface of the protrusion 9 is connected to the lower surface of the busbar 7, which can improve the contact area with the busbar 7.

[0048] Step 5: Stack the main grid bodies 1 together and control the spacing between the tabs 4 to be between 3±0.2mm, thus completing the central compact tab 4 grid structure of the valve-regulated lead-acid battery.

[0049] In practical use, the grid body 1 is first composed of frame 101, horizontal grid strips 102 and vertical grid strips 103. The horizontal and vertical grid strips 103 are interwoven in a grid pattern, which not only provides mechanical support for the grid body 1, but also serves as a current conduction path. The adjacent spacing is controlled at 16±0.5mm. The reinforcing ribs 105 in the interlaced spaces 104 further enhance the mechanical strength. The main current collector strip 5 is set at the center of the interlaced position, tapering from top to bottom, with a trapezoidal cross-section and an edge radius of 1.0±0.1mm, which enhances strength and conductivity, reduces stress concentration, and promotes uniform current distribution.

[0050] Next, the tab 4 is installed at the top center of the grid body 1, with a protrusion 9 at the top. It is connected to the busbar 7 by ultrasonic welding to increase the contact area, reduce the resistance, and achieve efficient current transmission. The herringbone-shaped reinforcing rib 6 at the connection between the tab 4 and the main collector bar 5 disperses stress, stabilizes the connection, and prevents breakage.

[0051] The outer frame 2 is composed of horizontal bars 21 and vertical bars 22. The vertical bars 22 have rounded ends and fixed bars 23. The horizontal bars 21 have corresponding fixed holes 24 for easy assembly and also provide an installation base for the positioning component 3 and the reinforcing rib 6. The positioning post 31 of the positioning component 3 is fixed inside the horizontal bars 21 and vertical bars 22 and cooperates with the positioning holes 32 on the outer side wall of the frame 101 to accurately position the main body of the grid plate 1 and enhance the structural stability.

[0052] A separator 8 is set between adjacent grid bodies 1, and the spacing of the tabs 4 is controlled at 3±0.2mm to optimize current distribution, reduce internal resistance, and improve battery performance and energy density. Finally, the grid bodies 1 are stacked and the spacing of the tabs 4 is controlled to complete the fabrication of the entire grid structure. This solves a series of technical problems existing in the design of traditional grid bodies 1, provides a new technical path for improving the performance of valve-regulated lead-acid batteries, and achieves higher energy density and better electrical performance.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve regulated lead acid battery central compacted tab grid structure comprising a grid body (1) characterized in that: It also includes an outer frame (2) and a positioning assembly (3) installed on the inner side of the outer frame (2), the plate grid body (1) is located on the inner side of the outer frame (2) and connected with one end of the positioning assembly (3), the top of the plate grid body (1) is provided with a tab (4), the tab (4) is arranged at the center of the plate grid body (1), a main bus bar (5) is arranged downward from the center of the tab (4) on the plate grid body (1), a reinforcing rib (6) is arranged at the connection between the tab (4) and the main bus bar (5), the reinforcing rib (6) is arranged in a herringbone shape, a bus bar (7) is ultrasonically welded at the top end of the tab (4), a partition plate (8) is arranged between two adjacent plate grid bodies (1), and the distance between the tabs (4) on the two adjacent plate grid bodies (1) is 3±0.2mm.

2. A central compacted tab grid structure for a valve regulated lead acid battery according to claim 1, characterized in that: The main bus bar (5) gradually tapers from top to bottom, the cross section of the main bus bar (5) is arranged in a trapezoidal shape, and the edge of the top end of the tab (4) is arranged in an arc shape.

3. A central compacted tab grid structure for a valve regulated lead acid battery according to claim 1, wherein: The plate grid body (1) includes a frame (101), a transverse grid bar (102) and a vertical grid bar (103), the transverse grid bar (102) is arranged parallel to the upper and lower edges of the inner side of the frame (101), the vertical grid bar (103) is arranged parallel to the left and right edges of the inner side of the frame (101), the transverse grid bar (102) and the vertical grid bar (103) are distributed in a grid shape, the main bus bar (5) is arranged at the center of the intersection position of the transverse grid bar (102) and the vertical grid bar (103), the lower end of the reinforcing rib (6) is arranged at the center of the upper end of the frame (101) and connected with the upper end of the main bus bar (5), the corners of the outer side of the frame (101) are arranged in a round shape, and the outer side of the frame (101) is connected with the positioning assembly (3).

4. A central compacted tab grid structure for a valve regulated lead acid battery according to claim 3, wherein: The distance between the adjacent transverse grid bars (102) is 16±0.5mm, and the distance between the adjacent vertical grid bars (103) is 16±0.5mm.

5. A central compacted tab grid structure for a valve regulated lead acid battery as defined in claim 1 wherein: The edge of the main bus bar (5) is arranged in a round shape, and the radius of the edge of the main bus bar (5) is 1.0±0.1mm.

6. A central compacted tab grid structure for a valve regulated lead acid battery according to claim 4, wherein: The transverse grid bar (102) and the vertical grid bar (103) form an empty space (104) between the intersection positions, and a reinforcing rib (105) is arranged in the empty space (104).

7. A central compacted pasted terminal plate grid structure for a valve regulated lead acid battery as defined in claim 1 wherein: A protrusion (9) is arranged at the center of the top end of the tab (4), and the surface of the protrusion (9) is connected with the lower surface of the bus bar (7).

8. A central compacted pasted terminal plate grid structure for a valve regulated lead acid battery as defined in claim 1 wherein: The outer frame (2) includes two horizontal rods (21) and two vertical rods (22), the two ends of the vertical rod (22) are arranged in a circular arc shape, the two ends of the vertical rod (22) are provided with a fixing rod (23), the two ends of the horizontal rod (21) are provided with a fixing hole (24) corresponding to the position of the fixing rod (23), the vertical rod (22) is fixed by being inserted into the fixing hole (24) of the horizontal rod (21) through the fixing rod (23), and the upper end of the reinforcing rib (6) is arranged on the upper horizontal rod (21).

9. A central compacted pasted terminal plate grid structure for a valve regulated lead acid battery as defined in claim 1 wherein: The positioning assembly (3) comprises positioning columns (31) fixed around the inner side of the horizontal rod (21) and the vertical rod (22), and positioning holes (32) formed on the outer side wall of the frame (101) and corresponding to the positions of the positioning columns (31), one end of the positioning column (31) being inserted into the positioning hole (32).

10. A method of manufacturing a central compact tab grid structure for a valve regulated lead acid battery according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step one: according to the needs of the grid structure, the alloy material is made into a frame (101) through a mold, and then the corners on the outer side of the frame (101) are made into round corners; Step two: then, the horizontal grid bars (102) are installed parallel to the upper and lower edges of the inner side of the frame (101), and the vertical grid bars (103) are installed parallel to the left and right edges of the inner side of the frame (101), so that they are distributed in a grid shape, the distance between adjacent horizontal grid bars (102) is controlled to be 16±0.5 mm, the distance between adjacent vertical grid bars (103) is controlled to be 16±0.5 mm, the reinforcing ribs (105) are arranged in the spaces (104) at the intersection positions of the horizontal grid bars (102) and the vertical grid bars (103), and the main current collecting bars (5) are arranged at the centers of the intersection positions of the horizontal grid bars (102) and the vertical grid bars (103), the main current collecting bars (5) gradually taper from top to bottom, the cross section is trapezoidal, the edges are round corners, and the radius of the round corners is 1.0±0.1 mm Step three: then, the tab (4) is installed at the top center of the grid body (1), the protrusion (9) is arranged at the top center, the reinforcing rib (6) in the shape of a chevron is installed at the connection position of the tab (4) and the main current collecting bar (5), the lower end of the reinforcing rib (6) is installed at the center of the upper end of the frame (101) and connected with the upper end of the main current collecting bar (5), and the upper end of the reinforcing rib (6) is installed on the outer frame (2); Step four: finally, the prepared grid body (1) is installed on the inner side of the outer frame (2) through the positioning assembly (3), the grid body (1) is connected with one end of the positioning assembly (3), the partition plate (8) is installed between the adjacent two grid bodies (1), the bus bar (7) is welded at the top end of the tab (4) by using the ultrasonic welding method, the surface of the protrusion (9) is connected with the lower surface of the bus bar (7), and the contact area with the bus bar (7) can be improved; Step five: the grid bodies (1) are stacked, and the distance between the tabs (4) is controlled to be 3±0.2 mm, and thus the valve-regulated lead-acid battery central compact tab (4) grid structure is completed.

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