Novel-structure plate grid, plate group and lead-acid storage battery

Abstract

The utility model discloses a grid with a novel structure, a pole group and a lead-acid storage battery, and aims to solve the problems that in the prior art, a pole lug is arranged on an outer frame of the grid, so that the current density far away from the lower part of the pole lug is relatively low, the utilization rate of active substances of the pole group is reduced, and the consistency of the utilization rates of the active substances at the upper part and the lower part of the pole group is poor. The defects that the current density of the upper part is large, the grid corrosion is accelerated, the utilization rate of the active substance of the lower part is low, the active substance is easily argillized, and the service life of the battery is finally shortened are overcome. The technical problem is solved through the following technical scheme that the steel plate comprises a plurality of circular ribs which are different in diameter and are concentrically arranged, and the plurality of circular ribs are connected through a plurality of vertical ribs; and the circular rib on the innermost layer is welded with a tab. The plurality of vertical ribs are matched with the plurality of round ribs, so that the novel grid plate structure forms a centrosymmetric structure, the utilization rate of active substances borne on the grid is more uniform, and corrosion of the grid and argillization of the active substances are delayed.

Description

Technical Field

[0001] The utility model relates to the technical field of pole group structures, and more specifically, to a new structure grid, a pole group and a lead-acid storage battery. Background Art

[0002] Due to the continuous expansion of the lithium-ion battery application market, lead-acid batteries are in urgent need of innovation and the utilization rate of active materials. The pole group structure of the batteries currently used in the market is mostly square, and the pole ears of the grid used in the pole group are set on the outer frame of the grid, so that the current density at the lower position away from the pole ears is relatively small; the utilization rate of active materials in this pole group is low, and the consistency of the utilization rate of active materials in the upper and lower parts of the pole group is poor. The current density in the upper part is large, the corrosion progress of the grid is accelerated, the utilization rate of active materials in the lower part is low, and the active materials are more likely to become muddy, which eventually causes the battery to fail prematurely.

[0003] The Chinese patent announcement number is CN215184429U, and the announcement date is December 14, 2021. The name of the invention is a cast-welded through-type battery plate grid ear. The application discloses a battery grid. In the above application, the pole ear is set on the outer frame of the grid, so that the current density at the lower position away from the pole ear is small; the utilization rate of the active material in the pole group is low, and the consistency of the utilization rate of the active material in the upper and lower parts of the pole group is poor. This makes the upper current density large, which accelerates the corrosion of the grid, and the utilization rate of the active material in the lower part is low, which makes the active material more likely to muddy, and finally causes the battery to fail prematurely. Utility Model Content

[0004] The utility model overcomes the problem in the prior art that the pole lug is set on the outer frame of the grid, so that the current density at the position far away from the lower part of the pole lug is small, resulting in a reduced utilization rate of the active material of the pole group. The utilization rate of the active material of the pole group is low, and the consistency of the utilization rate of the active material in the upper and lower parts of the pole group is poor. This makes the current density in the upper part large, which accelerates the corrosion progress of the grid, and the utilization rate of the active material in the lower part is low, which makes the active material more easily muddy, and finally reduces the service life of the battery. A new structure grid is provided, which can be arranged horizontally, and the structure of the grid is a circular symmetrical structure. The pole lug is close to the middle of the grid, which greatly improves the utilization rate and consistency of the active material of the pole group, avoids the problem of sulfation of the active material in the lower part of the pole group caused by the continuous sedimentation of high-density sulfuric acid, and effectively improves the service life of the battery.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a new structural grid, comprising: a plurality of circular ribs with different diameters and arranged concentrically, the plurality of circular ribs are connected by a plurality of vertical ribs; the innermost circular ribs are welded with pole ears.

[0006] In the utility model, a number of vertical ribs and a number of circular ribs cooperate to form a centrally symmetrical structure of the new structure grid plate, and the pole ear is arranged near the center of the new structure grid plate. Compared with the traditional grid structure, the pole ear of the patent is closer to the center of the grid, and the grid is a circular structure. Due to the equipotential surface effect, the current flows from the pole ear through various positions of the grid, which greatly improves the consistency of its electric potential, makes the utilization rate of the active material carried on the grid more uniform, and delays the corrosion of the grid and the mudification of the active material.

[0007] Preferably, an avoidance groove is provided on the round rib on the other side relative to the pole lug.

[0008] The avoidance groove prevents the pole lug from contacting the adjacent grid.

[0009] Preferably, a plurality of vertical ribs are arranged on a plurality of circular ribs in a centrally symmetrical structure.

[0010] Due to the equipotential surface effect, through the above arrangement, the current flows from the pole ear through various positions of the grid, which greatly improves the consistency of its electrical potential, makes the utilization rate of the active material carried on the grid more uniform, and delays grid corrosion and active material mudding.

[0011] Preferably, a plurality of vertical ribs are evenly spaced along the circumferential direction on a plurality of circular ribs.

[0012] The current can flow through the vertical ribs to each position of the grid plate, making the utilization rate of the active material more uniform.

[0013] A new structure electrode group includes a plurality of positive plates and negative plates stacked in sequence, wherein the positive plates and negative plates are composed of a new structure grid; a separator is arranged between adjacent positive plates and negative plates; a plurality of positive plates are connected through a positive current collector, and a plurality of negative plates are connected through a negative current collector.

[0014] In the utility model, the new structure pole group is placed horizontally. Since the utilization rate of the active materials in the upper and lower parts of the new structure pole group is the same, the sulfuric acid in the upper and lower parts can be used, thereby avoiding the problem of high-density sulfuric acid continuously settling to the lower part and causing the active materials in the lower part of the new structure pole group to be sulfated. Ultimately, the service life of the battery is extended.

[0015] Preferably, the separator is an annular separator, the outer diameter of the separator is D1, the diameter of the positive electrode plate and the negative electrode plate is D2, and D1 is larger than D2.

[0016] This makes it possible to effectively prevent adjacent grid plates from contacting each other.

[0017] Preferably, both side end surfaces of the separator are provided with inwardly concave circular grooves, and the size of the circular grooves matches that of the positive electrode plate and the negative electrode plate.

[0018] When stacking the positive plates, negative plates and separators, the positive plates and negative plates can be embedded in the circular grooves, so that the entire electrode group can be arranged more neatly and stably.

[0019] The utility model relates to a lead-acid storage battery, in which adjacent electrode groups of a new structure are connected in series through a bus bar.

[0020] The lead-acid battery in the utility model is different from the traditional vertical arrangement of the pole group. The new structure pole group in this embodiment adopts a horizontal arrangement. The pressure surface of the new structure pole group is parallel to the bottom of the plastic shell, which avoids the pressure surface of the new structure pole group squeezing the plastic shell partition and causing the battery to swell; and the new structure pole group is placed horizontally. Since the utilization rate of the active materials in the upper and lower parts of the new structure pole group is the same, the sulfuric acid in the upper and lower parts will be used, thereby avoiding the problem of high-density sulfuric acid continuously settling to the lower part and causing the active materials in the lower part of the structure pole group to be sulfated. Finally, the service life of the battery is extended.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model is different from the traditional pole group in vertical arrangement. The new structure pole group in this embodiment adopts horizontal arrangement. The pressure surface of the new structure pole group is parallel to the bottom of the plastic shell, which avoids the pressure surface of the new structure pole group squeezing the plastic shell partition and causing the battery to bulge; because the structure of the new structure grid is circularly symmetrical, the pole ear is close to the middle of the grid, and the pole ear is parallel to the plate surface. The current is dispersed to each pole ear through the positive collector and the negative collector, and is conducted from the pole ear to the innermost round rib, and then conducted to the active material at each position through the round rib and vertical rib of the new structure grid, which greatly improves the utilization rate and consistency of the active material of the new structure pole group; the new structure pole group is placed horizontally. Since the utilization rate of the active material in the upper and lower parts of the new structure pole group is the same, the sulfuric acid in the upper and lower parts will be used, thereby avoiding the problem of high-density sulfuric acid continuously settling to the lower part and causing the active material in the lower part of the structure pole group to be sulfated. Finally, the service life of the battery is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the grid plate structure in the prior art of the utility model;

[0024] Figure 2 This is a schematic diagram of the new structural grid structure of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the positive plate and the negative plate of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the partition of the utility model;

[0027] Figure 5It is a schematic diagram of the structure of the pole group of the utility model;

[0028] Figure 6 It is a schematic diagram of the structure of the pole group, positive current collector and negative current collector of the utility model;

[0029] Figure 7 It is a front view of the pole group, positive current collector and negative current collector of the utility model;

[0030] Figure 8 It is a top view of the arrangement of the new structure pole group of the utility model;

[0031] Fig. 9 It is a front view of the arrangement of the new structure pole group of the utility model;

[0032] In the figure: 11, first circular rib, 12, second circular rib, 13, third circular rib, 14, fourth circular rib, 15, pole ear, 16, avoidance groove, 2, vertical rib, 3, positive electrode plate, 4, negative electrode plate, 5, separator, 61, positive current collector, 62, negative current collector, 7, bus bar. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1: Reference Figure 1 and Figure 2 As shown, a new structural grid includes: a plurality of circular ribs of different diameters and arranged concentrically, and the plurality of circular ribs are connected by a plurality of vertical ribs 2; the number of circular ribs in this embodiment is set to four, and the first circular rib 11, the second circular rib 12, the third circular rib 13 and the fourth circular rib 14 are arranged from the inside to the outside. The first circular rib 11 has the smallest diameter and is arranged in the innermost layer. The fourth circular rib 14 has the largest diameter and is arranged in the outermost layer. A pole lug 15 is welded on the inner side of the circular rib in the innermost layer, and an avoidance groove 16 is arranged on the inner side of the circular rib in the innermost layer and on the opposite side of the pole lug 15; that is, a pole lug 15 is welded on the inner side of the first circular rib 11, and an avoidance groove 16 is arranged on the inner side of the first circular rib 11 and on the opposite side of the pole lug 15.

[0035] A plurality of vertical ribs 2 are arranged along the radial direction of a plurality of circular ribs, and a plurality of vertical ribs 2 are arranged on a plurality of circular ribs in a centrally symmetrical structure, and a plurality of vertical ribs 2 are evenly spaced along the circumferential direction on a plurality of circular ribs. In this embodiment, 12 vertical ribs 2 are arranged, and the 12 vertical ribs 2 are evenly arranged on a plurality of circular ribs.

[0036] A number of vertical ribs 2 and a number of circular ribs cooperate to form a centrally symmetrical structure of the new structure grid plate, and the pole ear 15 is arranged near the center of the new structure grid plate. Compared with the traditional grid structure, the pole ear 15 of the present patent is closer to the center of the grid, and the grid is a circular structure. Due to the equipotential surface effect, the current flows from the pole ear 15 through various positions of the grid, which greatly improves the consistency of its electric potential, makes the utilization rate of the active material carried on the grid more uniform, and delays the corrosion of the grid and the mudification of the active material.

[0037] Example 2: Reference Figures 1 to 9 As shown, a new structure pole group includes a new structure grid, and also includes a plurality of positive plates 3, negative plates 4 and separators 5. The new structure grid includes: a plurality of circular ribs with different diameters and arranged concentrically, and the plurality of circular ribs are connected by a plurality of vertical ribs 2; the number of circular ribs in this embodiment is set to four, and the first circular rib 11, the second circular rib 12, the third circular rib 13 and the fourth circular rib 14 are arranged from the inside to the outside. The first circular rib 11 has the smallest diameter and is arranged in the innermost layer. The fourth circular rib 14 has the largest diameter and is arranged in the outermost layer. A pole ear 15 is welded on the inner side of the innermost circular rib, and an avoidance groove 16 is arranged on the inner side of the innermost circular rib and on the opposite side of the pole ear 15; that is, a pole ear 15 is welded on the inner side of the first circular rib 11, and an avoidance groove 16 is arranged on the inner side of the first circular rib 11 and on the opposite side of the pole ear 15.

[0038] A plurality of vertical ribs 2 are arranged along the radial direction of a plurality of circular ribs, and a plurality of vertical ribs 2 are arranged on a plurality of circular ribs in a centrally symmetrical structure, and a plurality of vertical ribs 2 are evenly spaced along the circumferential direction on a plurality of circular ribs. In this embodiment, 12 vertical ribs 2 are arranged, and the 12 vertical ribs 2 are evenly arranged on a plurality of circular ribs.

[0039] A plurality of positive plates 3 and negative plates 4 are stacked in sequence. Both the positive plates 3 and negative plates 4 are composed of new structure positive plates 3 and negative plates 4 are composed of new structure grids and active materials. The active materials are coated on the surface of the new structure grids to form positive plates 3 or negative plates 4. A separator 5 is arranged between adjacent positive plates 3 and negative plates 4. When the positive plates 3, separators 5 and negative plates 4 are stacked in sequence, the pole ears 15 of the positive plates 3 and the pole ears 15 of the negative plates 4 are symmetrically arranged along the center of the circle, so that the pole ears 15 of the positive plates 3 are in a straight line, and the pole ears 15 of the negative plates 4 are also in a straight line. Then, the pole ears 15 of the positive plates 3 in a straight line are connected by the positive current collector 61, and the pole ears 15 of the negative plates 4 in a straight line are connected by the negative current collector 62. The separator 5 is an annular separator 5 , the outer diameter of the separator 5 is D1 , the diameter of the positive electrode plate 3 and the negative electrode plate 4 is D2 , and D1 is greater than D2 .

[0040] Compared with the traditional grid structure, the pole ear 15 of this patent is closer to the center of the new structure grid. The new structure grid is a circular structure. Due to the equipotential surface effect, the current flows from the pole ear 15 through each position of the grid, which greatly improves the consistency of its electric potential, makes the utilization rate of the active material carried on the grid more uniform, and delays the corrosion of the grid and the mudification of the active material. The new structure pole group in this embodiment adopts a partition 5 of different structure. The partition 5 in this embodiment is annular, matching the distribution area of ​​the active material on the plate, preventing the positive and negative plates 4 from contacting and short-circuiting, and the wrapping method is also simpler; the overall structure of the new structure pole group is placed horizontally, avoiding the high-density sulfuric acid of the traditional battery from being deposited in the lower part of the battery, causing the problem of sulfation of the active material in the lower part of the new structure pole group.

[0041] like Figure 1 As shown, the plate grid ears of traditional lead-acid batteries are arranged above the outer frame of the plate grid, and the active material is stored in the square plate grid. The positive plate, the negative plate and the separator form a pole group and are arranged vertically in the plastic shell. The active material undergoes an electrochemical reaction, causing the pressure surface of the plastic shell to be squeezed and expanded; due to the factors of the grid structure, the utilization rate of the lower active material far from the pole ear is significantly lower than that of the upper part. In addition, sulfuric acid settles under the action of gravity, which accelerates the corrosion of the plate grid in the upper part of the pole group due to the high utilization rate of active materials and the high current density. The utilization rate of active materials in the lower part of the pole group is low and the sulfuric acid density is high, resulting in sulfation, which ultimately accelerates the failure process of the battery and reduces the service life of the battery.

[0042] like Figures 5 to 9 As shown, in this embodiment, by changing the structure of the grid, the overall structure of the new structure grid is a centrally symmetrical structure, and the pole ear 15 is arranged near the center of the new structure grid; compared with the traditional grid structure, the pole ear 15 of the present patent is closer to the center of the grid, and the overall structure of the new structure grid is a circular structure. Due to the equipotential surface effect, the current flows from the pole ear 15 through various positions of the grid, which greatly improves the consistency of its electrical potential, makes the utilization rate of the active material carried on the grid more uniform, and delays the corrosion of the grid and the mudification of the active material.

[0043] The fourth circular rib 14 supports the strength of the new structural grid, carries the outer circle active material and reduces the reaction deformation and shedding of the active material; the active material belongs to the existing technology, and the horizontal transverse ribs of the traditional grid rarely participate in the conduction of current. The current is mainly conducted by the vertical ribs 2 in the vertical direction, which makes the vertical ribs 2 more susceptible to corrosion and fracture. Because the grid in this patent is a circular structure, the current flowing through the pole ear 15 can flow through all positions of the new structure grid through the first circular rib 11, the second circular rib 12 and several vertical ribs 2, thereby reducing the corrosion and fracture caused by the long-term excessive current density of the vertical rib 2. Therefore, the several circular ribs and the several vertical ribs 2 all serve as flow channels for carrying active substances and current; the pole ear 15 is vertically arranged on the inner wall of the innermost circular rib, connecting the active substance and the load for electrical energy conversion, so that the new structure grid and the load can flow current, and the length is moderate, which is convenient for welding the positive current collector 61 and the negative current collector 62; the width of the pole ear 15 is smaller than the avoidance groove 16 in the symmetrical position, so that the pole ear 15 will not short-circuit with the innermost circular rib of the adjacent opposite pole plate; and the thickness of the pole ear 15 is the same as the thickness of the new structure grid, which is convenient for the active substance to be filled on the surface of the grid. The active material is stored between the circular frame formed by the innermost circular ribs and the outermost circular ribs of the grid. The separator 5 adopts a circular ring structure. The inner ring of the separator 5 matches the size of the innermost circular ribs of the new structure grid. The diameter of the outer ring of the separator 5 is 1-2mm larger than the diameter of the circular frame, that is, D1 is larger than D2. The separator 5 can prevent the positive and negative plates 4 from directly contacting and short-circuiting; the pole group composed of a number of positive plates 3, negative plates 4 and separators 5 is cylindrical, the positive current collector 61 is set on the positive ear 15 of the pole group, and the negative current collector 62 is set on the negative ear 15 of the pole group. The current generated by the reaction of the active material is collected to the current collector through the ear 15.

[0044] like Figure 8 and Fig. 9 As shown, this embodiment is different from the vertical arrangement of the traditional pole group. The new structure pole group in this embodiment adopts a horizontal arrangement. The pressure surface of the new structure pole group is parallel to the bottom of the plastic shell, which avoids the force on the pressure surface of the new structure pole group squeezing the plastic shell partition and causing the battery to bulge; because the structure of the new structure grid is a circular symmetrical structure, the pole ear 15 is close to the middle of the grid, and the pole ear 15 is parallel to the plate surface. The current is dispersed to each pole ear 15 through the positive current collector 61 and the negative current collector 62, and is conducted from the pole ear 15 to the innermost round rib, and then conducted to the active material at each position through the round rib and vertical rib 2 of the new structure grid, which greatly improves the utilization rate and consistency of the active material of the new structure pole group; the new structure pole group is placed horizontally. Since the utilization rate of the active material of the upper and lower parts of the new structure pole group is the same, the sulfuric acid in the upper and lower parts will be used, thereby avoiding the problem of high-density sulfuric acid continuously settling to the lower part and causing the active material at the lower part of the structure pole group to be sulfated. Finally, the service life of the battery is extended.

[0045] Example 3: Reference Figures 1 to 9 As shown, a lead-acid battery includes a plurality of new structure pole groups, and adjacent new structure pole groups are connected in series through a bus 7.

[0046] The new structure pole group includes a new structure grid, and also includes a plurality of positive plates 3, negative plates 4 and separators 5. The new structure grid includes: a plurality of circular ribs with different diameters and arranged concentrically, and the plurality of circular ribs are connected by a plurality of vertical ribs 2; the number of circular ribs in this embodiment is set to four, and the first circular rib 11, the second circular rib 12, the third circular rib 13 and the fourth circular rib 14 are arranged from the inside to the outside. The first circular rib 11 has the smallest diameter and is arranged in the innermost layer. The fourth circular rib 14 has the largest diameter and is arranged in the outermost layer. A pole ear 15 is welded on the inner side of the innermost circular rib, and an avoidance groove 16 is arranged on the inner side of the innermost circular rib and on the opposite side of the pole ear 15; that is, a pole ear 15 is welded on the inner side of the first circular rib 11, and an avoidance groove 16 is arranged on the inner side of the first circular rib 11 and on the opposite side of the pole ear 15.

[0047] A plurality of vertical ribs 2 are arranged along the radial direction of a plurality of circular ribs, and a plurality of vertical ribs 2 are arranged on a plurality of circular ribs in a centrally symmetrical structure, and a plurality of vertical ribs 2 are evenly spaced along the circumferential direction on a plurality of circular ribs. In this embodiment, 12 vertical ribs 2 are arranged, and the 12 vertical ribs 2 are evenly arranged on a plurality of circular ribs.

[0048] A plurality of positive plates 3 and negative plates 4 are stacked in sequence. Both the positive plates 3 and negative plates 4 are composed of new structure positive plates 3 and negative plates 4 are composed of new structure grids and active materials. The active materials are coated on the surface of the new structure grids to form positive plates 3 or negative plates 4. A separator 5 is arranged between adjacent positive plates 3 and negative plates 4. When the positive plates 3, separators 5 and negative plates 4 are stacked in sequence, the pole ears 15 of the positive plates 3 and the pole ears 15 of the negative plates 4 are symmetrically arranged along the center of the circle, so that the pole ears 15 of the positive plates 3 are in a straight line, and the pole ears 15 of the negative plates 4 are also in a straight line. Then, the pole ears 15 of the positive plates 3 in a straight line are connected by the positive current collector 61, and the pole ears 15 of the negative plates 4 in a straight line are connected by the negative current collector 62. The separator 5 is an annular separator 5 , the outer diameter of the separator 5 is D1 , the diameter of the positive electrode plate 3 and the negative electrode plate 4 is D2 , and D1 is greater than D2 .

[0049] In addition, inwardly concave circular grooves may be provided on both side end surfaces of the separator, and the size of the circular grooves matches the positive electrode plate 3 and the negative electrode plate 4. When the positive electrode plate 3, the negative electrode plate 4 and the separator 5 are stacked, the positive electrode plate 3 and the negative electrode plate 4 can be embedded in the circular grooves, so that the entire electrode group can be arranged more neatly and stably.

[0050] Compared with the traditional grid structure, the pole ear 15 of this patent is closer to the center of the new structure grid. The new structure grid is a circular structure. Due to the equipotential surface effect, the current flows from the pole ear 15 through each position of the grid, which greatly improves the consistency of its electric potential, makes the utilization rate of the active material carried on the grid more uniform, and delays the corrosion of the grid and the mudification of the active material. The new structure pole group in this embodiment adopts a partition 5 of different structure. The partition 5 in this embodiment is annular, matching the distribution area of ​​the active material on the plate, preventing the positive and negative plates 4 from contacting and short-circuiting, and the wrapping method is also simpler; the overall structure of the new structure pole group is placed horizontally, avoiding the high-density sulfuric acid of the traditional battery from being deposited in the lower part of the battery, causing the problem of sulfation of the active material in the lower part of the new structure pole group.

[0051] like Figure 1 As shown, the plate grid ears of traditional lead-acid batteries are arranged above the outer frame of the plate grid, and the active material is stored in the square plate grid. The positive plate, the negative plate and the separator form a pole group and are arranged vertically in the plastic shell. The active material undergoes an electrochemical reaction, causing the pressure surface of the plastic shell to be squeezed and expanded; due to the factors of the grid structure, the utilization rate of the lower active material far from the pole ear is significantly lower than that of the upper part. In addition, sulfuric acid settles under the action of gravity, which accelerates the corrosion of the plate grid in the upper part of the pole group due to the high utilization rate of active materials and the high current density. The utilization rate of active materials in the lower part of the pole group is low and the sulfuric acid density is high, resulting in sulfation, which ultimately accelerates the failure process of the battery and reduces the service life of the battery.

[0052] like Figures 5 to 9 As shown, in this embodiment, by changing the structure of the grid, the overall structure of the new structure grid is a centrally symmetrical structure, and the pole ear 15 is arranged near the center of the new structure grid; compared with the traditional grid structure, the pole ear 15 of the present patent is closer to the center of the grid, and the overall structure of the new structure grid is a circular structure. Due to the equipotential surface effect, the current flows from the pole ear 15 through various positions of the grid, which greatly improves the consistency of its electrical potential, makes the utilization rate of the active material carried on the grid more uniform, and delays the corrosion of the grid and the mudification of the active material.

[0053] The fourth circular rib 14 supports the strength of the new structural grid, carries the outer circle active material and reduces the reaction deformation and shedding of the active material; the active material belongs to the existing technology, and the horizontal transverse ribs of the traditional grid rarely participate in the conduction of current. The current is mainly conducted by the vertical ribs 2 in the vertical direction, which makes the vertical ribs 2 more susceptible to corrosion and fracture. Because the grid in this patent is a circular structure, the current flowing through the pole ear 15 can flow through all positions of the new structure grid through the first circular rib 11, the second circular rib 12 and several vertical ribs 2, thereby reducing the corrosion and fracture caused by the long-term excessive current density of the vertical rib 2. Therefore, the several circular ribs and the several vertical ribs 2 all serve as flow channels for carrying active substances and current; the pole ear 15 is vertically arranged on the inner wall of the innermost circular rib, connecting the active substance and the load for electrical energy conversion, so that the new structure grid and the load can flow current, and the length is moderate, which is convenient for welding the positive current collector 61 and the negative current collector 62; the width of the pole ear 15 is smaller than the avoidance groove 16 in the symmetrical position, so that the pole ear 15 will not short-circuit with the innermost circular rib of the adjacent opposite pole plate; and the thickness of the pole ear 15 is the same as the thickness of the new structure grid, which is convenient for the active substance to be filled on the surface of the grid. The active material is stored between the circular frame formed by the innermost circular ribs and the outermost circular ribs of the grid. The separator 5 adopts a circular ring structure. The inner ring of the separator 5 matches the size of the innermost circular ribs of the new structure grid. The diameter of the outer ring of the separator 5 is 1-2mm larger than the diameter of the circular frame, that is, D1 is larger than D2. The separator 5 can prevent the positive and negative plates 4 from directly contacting and short-circuiting; the pole group composed of a number of positive plates 3, negative plates 4 and separators 5 is cylindrical, the positive current collector 61 is set on the positive ear 15 of the pole group, and the negative current collector 62 is set on the negative ear 15 of the pole group. The current generated by the reaction of the active material is collected to the current collector through the ear 15.

[0054] like Figure 8 and Fig. 9 As shown, this embodiment is different from the vertical arrangement of the traditional pole group. The new structure pole group in this embodiment adopts a horizontal arrangement. The pressure surface of the new structure pole group is parallel to the bottom of the plastic shell, which avoids the pressure force on the pressure surface of the new structure pole group squeezing the plastic shell partition and causing the battery to bulge; because the structure of the new structure grid is a circular symmetrical structure, the pole ear 15 is close to the middle of the grid, and the pole ear 15 is parallel to the plate surface. The current is dispersed to each pole ear 15 through the positive current collector 61 and the negative current collector 62, and is conducted from the pole ear 15 to the innermost round rib, and then conducted to the active material at each position through the first round rib 11, the second round rib 12 and the vertical rib 2 of the new structure grid, which greatly improves the utilization rate and consistency of the active material of the new structure pole group; the new structure pole group is placed horizontally. Since the utilization rate of the active material of the upper and lower parts of the new structure pole group is the same, the sulfuric acid in the upper and lower parts will be used, thereby avoiding the problem of high-density sulfuric acid continuously settling to the lower part to cause the active material at the lower part of the structure pole group to be sulfatized. Finally, the service life of the battery is extended.

[0055] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A new structural grid, characterized in that: include: A plurality of circular ribs with different diameters and arranged concentrically are connected by a plurality of vertical ribs; and the innermost circular rib is welded with a pole ear.

2. The new structural grid according to claim 1 is characterized in that: An avoidance groove is arranged on the round rib on the other side relative to the pole ear.

3. The new structural grid according to claim 1 is characterized in that: A plurality of vertical ribs are arranged on a plurality of circular ribs in a centrally symmetrical structure.

4. The new structural grid according to claim 1, 2 or 3, characterized in that: A plurality of vertical ribs are evenly spaced and arranged on a plurality of circular ribs along the circumferential direction.

5. A new structure pole group, comprising the new structure grid according to any one of claims 1 to 4, characterized in that: It comprises a plurality of positive plates and negative plates stacked in sequence, wherein the positive plates and negative plates are composed of a new structural grid plate; a separator is arranged between adjacent positive plates and negative plates; a plurality of positive plates are connected through a positive current collector, and a plurality of negative plates are connected through a negative current collector.

6. The new structure pole group according to claim 5 is characterized in that: The separator is an annular separator, the outer diameter of the separator is D1, the diameter of the positive electrode plate and the negative electrode plate is D2, and D1 is greater than D2.

7. The new structure pole group according to claim 6 is characterized in that: The two side end surfaces of the separator are provided with inwardly concave circular grooves, and the size of the circular grooves matches the positive electrode plate and the negative electrode plate.

8. A lead-acid battery, characterized in that: It comprises a plurality of new structure pole groups as described in any one of claims 5 to 7, and adjacent new structure pole groups are connected in series via a bus.

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