Pole group assembly and lead-acid battery

Abstract

The invention provides a pole group assembly and a lead-acid battery, and relates to the technical field of lead-acid batteries. The plate group assembly comprises a grid, a first busbar, a second busbar and a shell structure, tabs are fixed at the tops and the bottoms of the grids, the tabs at the tops of the grids are electrically connected through a first busbar, and the tabs at the bottoms of the grids are electrically connected through a second busbar; the plurality of grids are all mounted in the shell structure, mounting holes are formed in the side wall of the shell structure, the mounting holes extend to the bottom from the top of the shell structure, conductive parts are arranged in the mounting holes, and the first busbar and the second busbar are electrically connected through the conductive parts. According to the plate group assembly, the tabs are arranged at the top and the bottom of the grid, and the first busbar and the second busbar are electrically connected through the conductive piece, so that the potential difference between the top and the bottom of the grid can be reduced, the utilization rate of active substances in the middle and the bottom of the grid is improved, and the current density distribution on the grid is more uniform; and the cycle life of the battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of lead-acid batteries, and in particular to a pole group component and a lead-acid battery. Background Art

[0002] Lead-acid batteries have a development history of more than 160 years. With mature manufacturing technology, stable performance and significant cost advantages, they have been widely used in many fields such as internal combustion engines, low-speed electric vehicles, backup power supplies and power storage.

[0003] The positive and negative plates are the core components of lead-acid batteries, which determine the battery's capacity, lifespan, and rate discharge characteristics. Figure 1 As shown, the existing positive and negative plates include a grid 1′ and a pole ear 10′, but there is only one pole ear 10′ and it is arranged on the top of the grid 1′. When multiple grids 1′ are stacked and the pole ears 10′ on the multiple grids 1′ are electrically connected through a bus to form a pole group, during the charge and discharge process of the lead-acid battery, the positive and negative plates in the pole group have the problem that the upper current density is large and the utilization rate of the active material coated on the grid is high, and the middle and lower current density is small and the utilization rate of the active material is low, which can easily lead to the growth and deformation of the positive plate, and even the breakage of the ribs or the frame. The positive active material near the pole ear is also easy to soften and fall off, limiting the cycle life of the lead-acid battery. Summary of the invention

[0004] The object of the present invention is to provide a pole group assembly and a lead-acid battery to alleviate the problem in the prior art that the positive and negative plates in the pole group of the lead-acid battery have a larger current density in the upper part and a higher utilization rate of the active material coated on the grid, while the current density in the middle and lower parts is smaller and the utilization rate of the active material is lower, which leads to the growth, deformation, and even rib or frame breakage of the positive plate, and the positive active material near the pole ear is also easy to soften and fall off, limiting the cycle life of the lead-acid battery.

[0005] In a first aspect, the present invention provides a pole group assembly, comprising a grid, a first busbar, a second busbar and a shell structure;

[0006] The top and bottom of the grid are both fixed with pole lugs, the grid is multiple and the pole lugs at the top of the multiple grids are electrically connected through the first bus bar, and the pole lugs at the bottom of the multiple grids are electrically connected through the second bus bar;

[0007] The plurality of grids are installed in the shell structure, and a mounting hole is provided in the side wall of the shell structure, the mounting hole extends from the top of the shell structure to the bottom of the shell structure, a conductive member is provided in the mounting hole, and the first bus and the second bus are electrically connected through the conductive member.

[0008] In an optional embodiment, the grid includes a plurality of transverse ribs and a plurality of longitudinal ribs, and the plurality of transverse ribs and the plurality of longitudinal ribs are interconnected to form a mesh structure;

[0009] The mesh density of the mesh structure gradually increases from the upper part to the middle part of the mesh structure; and the mesh density of the mesh structure gradually decreases from the middle part to the lower part of the mesh structure.

[0010] In an optional embodiment, the side between the top and the bottom of the grid is divided into a left side and a right side, and the pole lug at the top of the grid and the pole lug at the bottom of the grid are both arranged close to the left side of the grid;

[0011] From the left side to the right side of the mesh structure, the mesh density of the mesh structure gradually increases.

[0012] In an optional embodiment, densifying ribs are provided in the mesh of the mesh structure close to the pole lug.

[0013] In an optional embodiment, the mounting hole is provided at a position of the housing structure close to an end of the first busbar and an end of the second busbar.

[0014] In an optional embodiment, the conductive member is made of lead or lead-tin alloy.

[0015] In an optional embodiment, the conductive member is made of a lead-tin alloy, and the tin content in the lead-tin alloy is not greater than 5%.

[0016] In an optional embodiment, the ratio of the width to the height of the grid is 0.2 to 2.0.

[0017] In a second aspect, the present invention provides a lead-acid battery comprising a pole group assembly as described in any one of the aforementioned embodiments.

[0018] In an optional embodiment, it also includes a top cover and a bottom cover;

[0019] The top of the shell structure is provided with a through hole for exposing the first bus, the bottom of the shell structure is provided with a through hole for exposing the second bus, the top cover is provided outside the first bus and fixed to the top of the shell structure, and the bottom cover is provided outside the second bus and fixed to the bottom of the shell structure.

[0020] The pole group assembly provided by the present invention includes a grid, a first busbar, a second busbar and a shell structure; the top and bottom of the grid are fixed with pole ears, the grid is multiple and the pole ears at the top of the multiple grids are electrically connected through the first busbar, and the pole ears at the bottom of the multiple grids are electrically connected through the second busbar; the multiple grids are installed in the shell structure, and the side wall of the shell structure is provided with a mounting hole, the mounting hole extends from the top of the shell structure to the bottom of the shell structure, and a conductive member is provided in the mounting hole, and the first busbar and the second busbar are electrically connected through the conductive member. The pole group assembly provided by the present invention is used to assemble to form a lead-acid battery. During the assembly process, multiple grids can be stacked in the shell structure, and in two adjacent grids, one grid and the pole ears thereon form a positive plate, and the other grid and the pole ears thereon form a negative plate. When stacking the grids, the top pole ears of all positive plates and the top pole ears of all negative plates can be placed on the same straight line, and the bottom pole ears of all positive plates and the bottom pole ears of all negative plates can be placed on the same straight line. Then, the top pole ears of all positive plates are electrically connected in sequence through a first bus bar, and the top pole ears of all negative plates are electrically connected in sequence through a first bus bar; correspondingly, the bottom pole ears of all positive plates are electrically connected in sequence through a second bus bar, and the bottom pole ears of all negative plates are electrically connected in sequence through a second bus bar. Then, the first bus bar and the second bus bar are electrically connected using a conductive member, so that a pole group assembly can be formed, and a lead-acid battery can be formed after the top and bottom of the pole group assembly are capped. It should be noted that the grid is usually coated with active materials such as lead sulfate for conducting current, and the tabs are connected to the external circuit through the bus. During the operation of the lead-acid battery, the active materials will react to realize the charging or discharging process of the lead-acid battery. At this time, the current will flow between the active materials of the grid. Since the top and bottom of the grid in the present invention are provided with tabs, compared with the situation that only the tabs are provided on the top of the grid in the existing pole group, the active materials at the bottom of the grid in the present invention can also fully participate in the reaction, and the utilization rate of the active materials in the middle of the grid can also be improved. Based on this, the current density in the middle and lower part of the grid will also be increased accordingly. In addition, the present invention uses a conductive member to electrically connect the first bus and the second bus, which can effectively reduce the potential difference between the top and bottom of the grid during the operation of the pole group component, further improve the utilization rate of the active materials in the middle and bottom of the grid, and make the current density distribution on the grid more uniform, thereby increasing the capacity of the lead-acid battery and extending the cycle life of the acid battery.

[0021] Compared with the prior art, the pole group assembly provided by the present invention can not only reduce the potential difference between the top and bottom of the grid and improve the utilization rate of active materials in the middle and bottom of the grid, but also make the current density distribution on the grid more uniform, thereby improving the capacity of the lead-acid battery and extending the cycle life of the acid battery, while improving the growth, deformation, rib or frame breakage of the positive plate in the pole group assembly, and preventing the positive active material on the positive plate near the pole ear from softening and falling off.

[0022] The lead-acid battery provided by the present invention includes the above-mentioned pole group assembly, and thus the lead-acid battery provided by the present invention includes the above-mentioned pole group assembly and has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of an existing electrode plate;

[0025] Figure 2 An exploded view of a lead-acid battery including a pole group assembly provided in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of the grid and the tab provided in an embodiment of the present invention;

[0027] Figure 4 for Figure 3 The front view of the grid and the tab;

[0028] Figure 5 A schematic structural diagram of a housing structure provided by an embodiment of the present invention;

[0029] Figure 6 A top view of a housing structure provided by an embodiment of the present invention;

[0030] Figure 7 A front view of a housing structure provided by an embodiment of the present invention;

[0031] Figure 8 A comparison chart of the cycle life of an existing lead-acid battery and the cycle life of a lead-acid battery provided by an embodiment of the present invention;

[0032] Fig. 9 A schematic diagram of the structure of a top cover provided by an embodiment of the present invention;

[0033] Fig.10 A top view of a top cover provided in an embodiment of the present invention.

[0034] Icon: 1′-plate grid; 10′-pole ear; 1-plate grid; 10-pole ear; 11-densification rib; 2-first bus; 3-second bus; 4-shell structure; 40-mounting hole; 41-plate slot; 5-top cover; 50-acid injection hole; 6-bottom cover. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] Example:

[0039] like Figure 2-Figure 7 As shown, the pole group assembly provided in this embodiment includes a grid 1, a first bus bar 2, a second bus bar 3 and a shell structure 4; Figure 3 and Figure 4 As shown, the top and bottom of the grid 1 are fixed with pole ears 10. Figure 2 As shown, the grid 1 is multiple and the top tabs 10 of the multiple grids 1 are electrically connected through the first bus 2, and the bottom tabs 10 of the multiple grids 1 are electrically connected through the second bus 3; the multiple grids 1 are installed in the shell structure 4, and as shown Figure 5 , Figure 6 and Figure 7 As shown, a mounting hole 40 is provided in the side wall of the shell structure 4, and the mounting hole 40 extends from the top of the shell structure 4 to the bottom of the shell structure 4. A conductive member is provided in the mounting hole 40, and the first bus 2 and the second bus 3 are electrically connected through the conductive member.

[0040] The side wall of the shell structure 4 is provided with a mounting hole 40 which means that the mounting hole 40 is arranged between the outer side and the inner side of the side wall of the shell structure 4 . At this time, the diameter of the mounting hole 40 needs to be smaller than the thickness of the side wall of the shell structure 4 .

[0041] The pole group assembly provided in this embodiment is used to assemble a lead-acid battery. During the assembly process, multiple grids 1 can be stacked in the shell structure 4, and among two adjacent grids 1, one grid 1 and the pole lug 10 thereon form a positive plate, and the other grid 1 and the pole lug 10 thereon form a negative plate. Figure 2 As shown, when stacking the grid 1, the top pole ears 10 of all positive plates and the top pole ears 10 of all negative plates can be located on the same straight line, and the bottom pole ears 10 of all positive plates and the bottom pole ears 10 of all negative plates can be located on the same straight line, and then the top pole ears 10 of all positive plates are electrically connected in sequence through a first bus 2, and the top pole ears 10 of all negative plates are electrically connected in sequence through a first bus 2; correspondingly, the bottom pole ears 10 of all positive plates are electrically connected in sequence through a second bus 3, and the bottom pole ears 10 of all negative plates are electrically connected in sequence through a second bus 3. Then, the first bus 2 and the second bus 3 can be electrically connected by a conductive member, so that a pole group assembly can be formed, and a lead-acid battery can be formed after the top and bottom of the pole group assembly are capped.

[0042] It should be noted that the grid 1 is usually coated with active materials such as lead sulfate for conducting current, and the tabs 10 are connected to the external circuit through the bus. During the operation of the lead-acid battery, the active materials will react to realize the charging or discharging process of the lead-acid battery. At this time, the current will flow between the active materials of the grid 1. Since the tabs 10 are provided at the top and bottom of the grid 1 in this embodiment, compared with Figure 1 In the case where the existing electrode plate shown is only provided with an electrode ear 10' on the top of the grid 1', the active material in the lower part of the grid 1 in this embodiment can also fully participate in the reaction, and the utilization rate of the active material in the middle part of the grid 1 can also be improved. Based on this, the current density in the lower part of the grid 1 will also be correspondingly improved.

[0043] In addition, the present embodiment utilizes a conductive member to electrically connect the first bus 2 and the second bus 3, which can effectively reduce the potential difference between the top and the bottom of the grid 1 during the operation of the pole group assembly, further improve the utilization rate of active materials in the middle and bottom of the grid 1, and make the current density distribution on the grid 1 more uniform, thereby increasing the capacity of the lead-acid battery and extending the cycle life of the acid battery. Compared with existing lead-acid batteries of the same model, the utilization rate of active materials can be increased by more than 5% and the cycle life can be extended by more than 50%.

[0044] It should also be noted that the pole group assembly provided in the present embodiment opens a mounting hole 40 in the side wall of the shell structure 4 containing the grid 1, and then installs the conductive part in the mounting hole 40, so that the shell structure 4, which is an inherent structure in the lead-acid battery, can be used to protect and insulate the conductive part; by extending the mounting hole 40 from the top of the shell structure 4 to the bottom of the shell structure 4, the position of the conductive part in the shell structure 4 can be optimized, so that the two ends of the conductive part are close to the first bus 2 and the second bus 3 respectively, which not only facilitates the installation connection between the first bus 2 and the conductive part and the second bus 3, but also reduces the material waste of the conductive part.

[0045] Furthermore, the mounting hole 40 may extend along the height direction of the shell structure 4, in which case the conductive member may be shortened to the maximum extent, further reducing material waste of the conductive member.

[0046] Compared with the prior art, the pole group assembly provided in this embodiment can not only reduce the potential difference between the top and bottom of the grid 1 and improve the utilization rate of active materials in the middle and bottom of the grid 1, but also make the current density distribution on the grid 1 more uniform, thereby improving the capacity of the lead-acid battery and extending the cycle life of the acid battery, while improving the growth, deformation, rib or frame breakage of the positive plate in the pole group assembly, and preventing the positive active material on the positive plate near the pole ear 10 from softening and falling off.

[0047] It can be seen that compared with the single bus structure of the existing pole group that only uses one bus to connect the pole ear 10' at the top of the grid 1', the pole group assembly provided in this embodiment uses the first bus 2 and the second bus 3 to connect the top pole ear 10 of the grid 1 and the bottom pole ear 10 of the grid 1 respectively, thereby forming a double bus structure. The double bus structure can effectively reduce the potential difference between the top and bottom of the grid 1 and improve the utilization rate of active materials in the middle and bottom of the grid 1.

[0048] Among them, insulation is required between the multiple grids 1 stacked in the shell structure 4 to prevent electrical connection between the plate surfaces of two adjacent grids 1. Therefore, an insulating member can be set between each group of two adjacent grids 1. Specifically, the insulating member can be a partition with a groove. When assembling the pole group component, the above-mentioned partition can be first clamped on each positive plate in the multiple grids 1, or the above-mentioned partition can be first clamped on each negative plate in the multiple grids 1, and then the positive plates and the negative plates are alternately stacked in the shell structure 4. At this time, the side wall of the groove of the partition abuts between the two adjacent grids 1, which can play an insulating role.

[0049] It should be noted that clamping the separator only on the positive plate or clamping the separator only on the negative plate can effectively simplify the assembly steps and improve the assembly efficiency.

[0050] In order to improve the installation stability of the grid 1 in the shell structure 4, as Figure 2 , Figure 5 and Figure 6 As shown, a plurality of plate slots 41 may be provided in the shell structure 4, and a plurality of plate grids 1 are used to be correspondingly assembled in the plurality of plate slots 41. In order to prevent the electrical connection process between the pole ear 10 and the busbar from being obstructed, the top pole ear 10 of each plate grid 1 is exposed through the notch of the plate slot 41, and the bottom pole ear 10 of each plate grid 1 is exposed through the bottom opening of the plate slot 41. At this time, the first busbar 2 and the second busbar 3 are respectively arranged at the top and bottom of the shell structure 4, and the exposed parts of the top pole ears 10 of the plurality of plate grids 1 can be electrically connected to the first busbar 2 in sequence by cast welding, and the exposed parts of the bottom pole ears 10 of the plurality of plate grids 1 can be electrically connected to the second busbar 3 in sequence by cast welding. It should be noted that the two ends of the conductive member in the mounting hole 40 can be respectively extended out of the mounting hole 40, and then electrically connected to the first busbar 2 and the second busbar 3 respectively by cast welding.

[0051] like Figure 5 , Figure 6 and Figure 7 As shown, the mounting holes 40 are provided at positions of the housing structure 4 close to the ends of the first busbar 2 and the ends of the second busbar 3 .

[0052] Specifically, the first busbar 2 and the second busbar 3 each include a first end and a second end, and the first end of the first busbar 2 and the first end of the second busbar 3 are distributed along the height direction of the shell structure 4, and the second end of the first busbar 2 and the second end of the second busbar 3 are distributed along the height direction of the shell structure 4. In this embodiment, preferably, a mounting hole 40 is provided at a position of the shell structure 4 close to the first end of the first busbar 2 and the first end of the second busbar 3, and the mounting hole 40 is parallel to the line between the first end of the first busbar 2 and the first end of the second busbar 3; and, in this embodiment, preferably, a mounting hole 40 is provided at a position of the shell structure 4 close to the second end of the first busbar 2 and the second end of the second busbar 3, and the mounting hole 40 is parallel to the line between the second end of the first busbar 2 and the second end of the second busbar 3.

[0053] This arrangement allows the conductive member in the mounting hole 40 to be close to the positive and negative terminals of the bus, thereby facilitating the electrical connection process between the conductive member and the bus and improving the convenience of the electrical connection process between the conductive member and the bus.

[0054] In order to improve the installation stability of the conductive member in the installation hole 40 , after the conductive member is inserted into the installation hole 40 , a colloid may be used to fix the conductive member in the installation hole 40 .

[0055] like Figure 3 and Figure 4 As shown, the grid 1 includes a plurality of transverse ribs and a plurality of longitudinal ribs, which are interconnected to form a mesh structure; the mesh density of the mesh structure gradually increases from the upper part to the middle part; and the mesh density of the mesh structure gradually decreases from the middle part to the lower part.

[0056] This arrangement makes the grid density in the middle of the grid 1 higher than that in Figure 1 As shown in the existing electrode plate, the grid 1 provided in this embodiment can effectively increase the distribution area of ​​the active material in the middle of the grid 1, reduce the resistivity in the middle of the grid 1, increase the current density in the middle of the grid 1, and thus effectively improve the utilization rate of the active material in the middle of the grid 1.

[0057] Since the current distribution density on the grid 1 is smaller as it is farther away from the pole ear 10, Figure 3 and Figure 4 As shown, in this embodiment, the side between the top and the bottom of the grid 1 is preferably divided into a left side and a right side, and the pole ear 10 at the top of the grid 1 and the pole ear 10 at the bottom of the grid 1 are both arranged close to the left side of the grid 1; from the left side to the right side of the mesh structure, the grid density of the mesh structure gradually increases.

[0058] This arrangement improves the current distribution density at a position of the grid 1 away from the pole lug 10 , thereby effectively improving the current distribution uniformity on the grid 1 .

[0059] Further, such as Figure 4 As shown, the top tab 10 of the grid 1 and the bottom tab 10 of the grid 1 are symmetrically arranged with the transverse central axis of the grid 1 as the symmetry axis. The symmetrical arrangement helps to improve the uniformity of the current distribution density on the grid 1.

[0060] like Figure 3 and Figure 4 As shown, a densifying rib 11 is provided in the mesh of the mesh structure close to the pole lug 10 .

[0061] The material of the densified ribs 11 is the same as that of the transverse ribs and the longitudinal ribs on the grid 1 , and the densified ribs 11 also need to be coated with active substances.

[0062] It should be noted that, through actual verification, it was found that the utilization rate of active materials at the grid around the pole lug 10 is low. Therefore, by setting densifying ribs 11 in the grid near the position of the pole lug 10, the contact area between the active materials on the grid and the grid 1 can be increased, thereby improving the utilization rate of active materials on the side of the pole lug 10.

[0063] In this embodiment, the conductive member may be a conductive wire.

[0064] In addition, the conductive member may be made of lead or lead-tin alloy.

[0065] In order to improve the conductive effect and service life of the conductive part, in this embodiment, the conductive part is preferably made of a lead-tin alloy, and the tin content in the lead-tin alloy is not greater than 5%.

[0066] It should be noted that with the development of low-speed electric vehicles, battery models have become more fixed, and the plate size has basically reached a unified level. For example, the width of the positive and negative plates in the existing 12V20Ah series lead-acid batteries is usually narrow (77mm), the width of the positive and negative plates is also narrow (65-69mm), and the height of the positive and negative plates is generally 135-150mm. Therefore, the ratio of the width to the height of the positive and negative plates of the existing 12V20Ah series lead-acid batteries is usually between 0.45 and 0.50. Experimental verification has found that the aspect ratio of the plate also affects the utilization rate of active materials and the uniformity of current density distribution. The aspect ratio of the positive and negative plates in the existing lead-acid batteries is 0.45-0.50, which leads to uneven current density distribution on the plate and uneven utilization of active materials, which also limits the number of cycles of the lead-acid battery.

[0067] The width to height ratio of the grid 1 in this embodiment can be 0.2 to 2.0. Furthermore, in this embodiment, the width to height ratio of the grid 1 is preferably greater than 0.5 and less than 2.0. At this time, the aspect ratio of the grid 1 is greatly improved, which can effectively improve the cycle life of the lead-acid battery.

[0068] Taking the grid 1 with an aspect ratio of 0.48 and the grid 1 with an aspect ratio of 1.23 as examples, the grid 1 provided in the present embodiment with the above two aspect ratios is made into a lead-acid battery through the steps of mixing with paste, coating with plates, curing, assembling, and forming, and the existing plate with an aspect ratio of 0.48 is made into a lead-acid battery through the steps of mixing with paste, coating with plates, curing, assembling, and forming, and then the above three lead-acid batteries are subjected to a cycle life comparison test. The data after the test are shown in Table 1. Table 1 is a data table of potential difference, battery capacity and cycle life of the lead-acid battery made of the grid 1 with an aspect ratio of 0.48 provided in the present embodiment, the lead-acid battery made of the grid 1 with an aspect ratio of 1.23 provided in the present embodiment, and the lead-acid battery made of the existing plate with an aspect ratio of 0.48.

[0069] Table 1

[0070]

[0071] By comparing the data in Table 1, it can be seen that compared with the lead-acid battery made of the existing plate with an aspect ratio of 0.48, the lead-acid battery made of the grid 1 with an aspect ratio of 1.23 provided in this embodiment (and the grid 1 provided in this embodiment has a larger grid density in the middle, and the top pole ear 10 and the bottom pole ear 10 of the grid 1 are electrically connected through a bus and a conductive member) can increase its capacity by more than 5% and its cycle life by more than 100%.

[0072] also, Figure 8 A comparison chart of the cycle life of an existing lead-acid battery and the cycle life of a lead-acid battery provided by an embodiment of the present invention, Figure 8 The horizontal axis is the battery cycle life, and the vertical axis is the battery capacity retention rate (referring to the ratio of the battery capacity to the initial capacity after a period of use). Curve A represents the lead-acid battery made of the grid 1 with an aspect ratio of 0.48 provided in this embodiment, curve B represents the lead-acid battery made of the grid 1 with an aspect ratio of 1.23 provided in this embodiment, and curve C represents the lead-acid battery made of the existing plate with an aspect ratio of 0.48. By comparison Figure 8 It can also be seen from the curve in that the capacity retention rate and cycle life of the lead-acid battery made using the grid 1 provided in this embodiment are effectively improved compared with the lead-acid battery made using the existing plate.

[0073] like Figure 2 As shown, this embodiment also provides a lead-acid battery, which includes the above-mentioned pole group assembly. Since the lead-acid battery provided by this embodiment includes the above-mentioned pole group assembly, the lead-acid battery and the above-mentioned pole group assembly can solve the same technical problems and achieve the same technical effects, which will not be repeated here.

[0074] It should be noted that if Figure 2 , Fig. 9 and Fig.10 As shown, the lead-acid battery provided in this embodiment also includes a top cover 5 and a bottom cover 6; the top of the shell structure 4 is provided with a through hole for exposing the first bus bar 2, and the bottom of the shell structure 4 is provided with a through hole for exposing the second bus bar 3, the top cover 5 is arranged outside the first bus bar 2 and fixed to the top of the shell structure 4, and the bottom cover 6 is arranged outside the second bus bar 3 and fixed to the bottom of the shell structure 4.

[0075] During the process of assembling the lead-acid battery, the first busbar 2 and the second busbar 3 are cast-welded to the top pole ear 10 and the bottom pole ear 10 of the grid 1 respectively, and the conductive member is cast-welded between the first busbar 2 and the second busbar 3, and then the top cover 5 can be fixed to the top of the shell structure 4 and the bottom cover 6 can be fixed to the bottom of the shell structure 4 by means of glue sealing or the like.

[0076] It should be noted that in the existing lead-acid battery and the lead-acid battery provided in this embodiment, the top cover 5 needs to be provided with an acid injection hole 50. When the lead-acid battery in this embodiment is manufactured using a grid 1 with a relatively large width-to-height ratio, Fig. 9 and Fig.10 As shown, the position of the acid injection hole 50 needs to be adjusted accordingly. At this time, the position of the acid injection hole 50 is different from the position of the acid injection hole 50 on the existing lead-acid battery top cover 5.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pole group component, characterized in that: It comprises a grid (1), a first busbar (2), a second busbar (3) and a shell structure (4); The top and bottom of the grid (1) are both fixed with pole lugs (10), the grid (1) is multiple and the pole lugs (10) at the top of the multiple grids (1) are electrically connected via the first busbar (2), and the pole lugs (10) at the bottom of the multiple grids (1) are electrically connected via the second busbar (3); The plurality of grids (1) are all installed in the shell structure (4), and a mounting hole (40) is provided in a side wall of the shell structure (4), the mounting hole (40) extending from the top of the shell structure (4) to the bottom of the shell structure (4), and a conductive member is provided in the mounting hole (40), and the first busbar (2) and the second busbar (3) are electrically connected via the conductive member.

2. The pole group assembly according to claim 1, characterized in that: The grid (1) comprises a plurality of transverse ribs and a plurality of longitudinal ribs, wherein the plurality of transverse ribs and the plurality of longitudinal ribs are interconnected to form a mesh structure; The mesh density of the mesh structure gradually increases from the upper part to the middle part of the mesh structure; and the mesh density of the mesh structure gradually decreases from the middle part to the lower part of the mesh structure.

3. The pole group assembly according to claim 2, characterized in that: The side between the top and the bottom of the grid (1) is divided into a left side and a right side, and the pole lug (10) at the top of the grid (1) and the pole lug (10) at the bottom of the grid (1) are both arranged close to the left side of the grid (1); From the left side to the right side of the mesh structure, the mesh density of the mesh structure gradually increases.

4. The pole group assembly according to claim 2, characterized in that: Densifying ribs (11) are provided in the mesh of the mesh structure close to the pole lug (10).

5. The pole group assembly according to any one of claims 1 to 4, characterized in that: The mounting hole (40) is provided at a position of the housing structure (4) close to an end of the first busbar (2) and an end of the second busbar (3).

6. The pole group assembly according to any one of claims 1 to 4, characterized in that: The conductive element is made of lead or lead-tin alloy.

7. The pole group assembly according to claim 6, characterized in that: The conductive member is made of a lead-tin alloy, and the tin content in the lead-tin alloy is not greater than 5%.

8. The pole group assembly according to claim 7, characterized in that: The ratio of the width to the height of the grid (1) is 0.2 to 2.

0.

9. A lead-acid battery, characterized in that: Comprising the pole group assembly described in any one of claims 1-8.

10. The lead-acid battery according to claim 9, characterized in that: It also includes a top cover (5) and a bottom cover (6); The top of the shell structure (4) is provided with a through hole for exposing the first bus bar (2), the bottom of the shell structure (4) is provided with a through hole for exposing the second bus bar (3), the top cover (5) is arranged outside the first bus bar (2) and is fixed to the top of the shell structure (4), and the bottom cover (6) is arranged outside the second bus bar (3) and is fixed to the bottom of the shell structure (4).

Images