A horizontal lead-acid battery

Abstract

The present invention provides a horizontal lead-acid battery, comprising a battery shell and one or more battery pole groups arranged in the battery shell, the battery pole group comprising a positive terminal plate, a plurality of stacked quasi-bipolar plates, a negative terminal plate and a diaphragm arranged between the positive and negative plates, one end of the quasi-bipolar plate is coated with a positive electrode active material, the other end is coated with a negative electrode active material, and a section of exposed lead wire is left in the middle for electrical connection between the positive and negative plates, an isolation barrier is arranged between adjacent battery pole groups for the lead wire to pass vertically and isolate the flow of liquid and / or gas between different battery pole groups, and the gap where the isolation barrier intersects with the lead wire is filled with a sealing medium; an annular glue-containing groove surrounding the isolation barrier is arranged at the position where the battery shell intersects with the isolation barrier, and the glue-containing groove is filled with a sealing medium for sealing the gap between the battery shell and the isolation barrier. This technical solution allows the lead wire to pass through the isolation barrier and fill it with a sealing medium at the intersection. Special structural parts are also set around the isolation barrier to accommodate the sealing medium. The gap between the isolation barrier and the shell is filled and sealed, which can achieve sealing between the cells of the horizontal lead-acid battery and solve the problem of liquid or gas crosstalk between the cells of the horizontal lead-acid battery.

Description

[Technical field]

[0001] The invention relates to a storage battery, in particular to a horizontal lead-acid battery with good sealing performance. [Background technology]

[0002] Lead-acid batteries began in 1859 with Gaston Plante's research on the charge and discharge of Pb electrodes in a 10wt% sulfuric acid solution. In 1881, Camille Faure applied a mixture of red lead, sulfuric acid and water to lead plates as electrodes, and Ernest Volckmar changed the lead plates to lead grids. These two technologies alleviated the softening and shedding of the lead paste at the positive and negative electrodes of lead-acid batteries, effectively increasing the capacity of lead-acid batteries. The structure of lead-acid batteries was basically formed and matured. After more than 150 years of research and improvement, lead-acid batteries have been innovated in terms of plates, additives, separator materials and manufacturing processes. At present, the output and storage capacity of lead-acid batteries still rank first among chemical power sources, and are making great contributions to the development and progress of human society. Due to its advantages of stability, reliability, no memory effect, low price, and the ability to be made into single large-capacity batteries, lead-acid batteries have been widely used as automobile starting power supplies, uninterruptible power supplies, power supplies from electric bicycles to diesel submarines, and energy storage power supplies, etc.

[0003] The basic structure of a traditional lead-acid battery is that the grid coated with lead paste forms positive and negative plates, which are separated by a diaphragm. After the positive and negative plates are welded to the corresponding busbars, the battery current is connected to the outside through the poles, and the battery cover seals the battery to prevent the electrolyte from flowing out. The plates of traditional lead-acid batteries are placed vertically, and electrolyte stratification will occur during use, that is, the polarization phenomenon of electrolyte concentration difference, which is one of the main reasons for the reduction of battery capacity and shortened life.

[0004] In order to solve the above problems, people have developed a horizontal lead-acid battery: the plate is a quasi-bipolar structure, that is, the positive electrode is coated on one side of the grid as a positive plate, and the negative electrode is coated on the other side as a negative plate; the bipolar plates are separated by a diaphragm and stacked horizontally in a certain position (such as Figure 1 As shown), the pressure frame is then installed to fix it, forming a battery module and loading it into the battery slot, which is sealed after cast welding, and then acid-filled and formed to finally form a horizontal battery, as described in the patent US5409787 applied for by the US Electrosource Company in 1993 and the patent US6074774 applied for in 1998.

[0005] However, although this horizontal lead-acid battery solves the electrolyte stratification phenomenon, has low internal resistance and is lightweight, and the series connection between cells is directly achieved by connecting the lead wires of the bipolar plates without welding (the traditional cell series connection first welds the positive lead end of the previous cell and the negative lead end of the next cell together, and then welds them together to achieve the series connection of adjacent cells), it has another inherent fatal flaw: liquid or gas crosstalk is very likely to occur between different cells (liquid crosstalk refers to the connection of electrolytes between different single-cell batteries, causing a short circuit between cells; gas crosstalk refers to the gas in a single cell, especially the positive electrode oxygen, which should be in the positive electrode. The negative electrode reacts with sponge lead to form lead oxide, and then the lead oxide reacts with sulfuric acid to form lead sulfate, which is then recharged and reduced to lead, thus avoiding the loss of water in the cell. However, if the cells are not completely sealed, the oxygen produced in the cell will leak into the adjacent cell, causing the cell to lose water and, at the same time, causing the negative electrode of the adjacent cell to discharge. Both of these situations are accompanied by heat generation, and grid corrosion will double for every 10-degree increase in temperature), resulting in increased self-discharge of the battery, aggravated corrosion of the lead wire, and poor group consistency, which seriously affects the battery life and greatly affects the battery life. This is also the primary factor limiting the application of horizontal lead-acid batteries.

[0006] In order to suppress the liquid or gas cross-talk between cells of a horizontal lead-acid battery, the sealing problem between the cells must be solved, and providing a separator (or seal, partition, insulator) between the cells is a more feasible solution. CN104160526A discloses a rectangular electrochemical storage device in an embodiment, which forms an ion-insulating isolation barrier through a liner + a gasket + a potting compound; CN103208633A discloses a horizontal battery, which is provided with a separator for blocking the flow of electrolyte between battery pole groups, and the separator is a connecting plastic frame arranged between the stacked positive plates and negative plates, and the connecting plastic frame and the plastic grid frame are melted together by ultrasonic welding; CN107305966A discloses a modular multi-cell battery, in which each cell is isolated by an insulating material, and each cell boundary on the side and bottom of the pressure frame is provided with an opening or a groove for injecting the insulating material to form a seal; CN107026287A discloses a method for manufacturing a lead-acid horizontal battery, which is sealed by the cooperation of a partition, a sealant, and a filler, and the filling spaces of multiple sealants are connected in sequence from top to bottom to form a filling channel.

[0007] Although the above patents all propose a technical solution of setting up separators between cells (equivalent to battery pole groups), the lead wires between bipolar plates are thin and dense, making it very difficult to seal. The solution of refilling fillers through openings or gaps is very difficult to control. The fillers will flow in all directions through the holes or gaps, and it is impossible to control them to form an ideal isolation barrier only in the vertical direction, even if they are overfilled. At the same time, how to assemble the separators well with other battery structures and meet the sealing requirements is still one of the key factors for the industrial production and application of horizontal lead-acid batteries. [Summary of the invention]

[0008] The invention provides a horizontal lead-acid battery, which can achieve sealing between cells of the horizontal lead-acid battery and solve the problem of liquid or gas cross-talk between cells of the horizontal lead-acid battery.

[0009] The technical solution of the present invention is as follows:

[0010] A horizontal lead-acid battery comprises a battery shell and one or more battery pole groups arranged in the battery shell, wherein the battery pole groups comprise a positive terminal plate, a plurality of stacked quasi-bipolar plates, a negative terminal plate and a diaphragm arranged between the positive and negative plates, wherein one end of the quasi-bipolar plate is coated with a positive active material, the other end is coated with a negative active material, and a section of exposed lead wire is left in the middle for electrical connection between the positive and negative plates, characterized in that an isolation barrier is provided between adjacent battery pole groups for allowing the lead wire to pass vertically and isolating the flow of liquid and / or gas between different battery pole groups, and the gap where the isolation barrier intersects with the lead wire is filled with a sealing medium; an annular adhesive groove surrounding the isolation barrier is provided at the position where the battery shell intersects with the isolation barrier, and the adhesive groove is filled with a sealing medium for sealing the gap between the battery shell and the isolation barrier. To solve the problem of liquid and gas crossover between different cells of horizontal lead-acid batteries, the cell space must be completely sealed to isolate the flow of liquid and gas. This technical solution allows the lead wire to pass through the isolation barrier and fill it with a sealing medium at the intersection. A special structure is also set around the isolation barrier to accommodate the sealing medium, and the gap between the isolation barrier and the shell is filled and sealed. In this way, the cell is completely sealed. The sealing medium is preferably an insulating material with a low melting point and no cracks or gaps between the shell and the lead wire after solidification, such as epoxy glue, hot melt plastic, or paraffin, etc.

[0011] 13. Furthermore, the battery shell is assembled from a separate bottom plate, side plate, and top cover. The seal between the isolation barrier and the shell requires that the battery shell be provided with an annular glue groove. However, during the mold injection molding of the existing integral battery shell, the mold must be pulled out during demolding. The existence of the draft angle makes it impossible to manufacture a glue groove that meets the precision requirements for the integral battery shell. The separate battery shell eliminates the influence of the draft angle of the manufacturing groove, and other structures that meet the precision requirements can be provided, which also increases the design space of the battery shell. For example, it can withstand increased assembly pressure without the need for an additional pressure frame for the battery assembly, which is also conducive to the lightweight design of the battery.

[0012] Furthermore, at least one isolation barrier and a sealing medium around it are provided on both sides of each of the battery pole groups. To solve the problem of liquid and gas crosstalk between different cells, it is only necessary to set an isolation barrier between the cells; and isolation barriers are provided on both sides of each unit, so that the cells at both ends can be sealed, so that the welding points connected to the outside can be separated from the acid storage space, which can further reduce corrosion and reduce the sealing requirements of battery components. For example, the end cover and the battery tank and the upper cover only need to ensure the welding or bonding strength, and there is no requirement for sealing; in addition, it can also ensure that the acid storage volume of the cells at the both ends is exactly the same as that of the middle cell, thereby improving the consistency between the single cells.

[0013] Furthermore, it also includes a bus bar arranged outside the isolation barrier and isolated from the battery electrolyte space. The isolation barrier is arranged between the bus bar and the acid storage space to reduce the corrosion of the bus bar, which is beneficial to improve the battery life and performance.

[0014] Furthermore, the side plate is provided with a negative electrode active material receiving groove in the extension direction of each negative electrode plate, and the negative electrode active material receiving groove is separated from any positive electrode plate. The receiving groove can provide a certain receiving space for the expanded negative electrode active material in the extension direction of the negative electrode plate. Under the assembly pressure of the battery shell, the expanded negative electrode active material will preferably extend in both directions, and will not climb along the edge gap of the electrode plate and then contact the positive electrode plate to short-circuit, thereby improving the comprehensive performance and service life of the battery.

[0015] Furthermore, the side panels and the top cover are fastened by screws, hot melt or dovetail self-locking. This structure can form a sealed container and withstand a certain assembly pressure. It does not require an additional pressure frame and allows a larger assembly pressure inside the battery, which is conducive to simplifying assembly and reducing the total weight of the battery.

[0016] Furthermore, the isolation barrier is composed of a plurality of elastic strip structures arranged and combined, and the lead wire is clamped between the upper and lower adjacent strip structures and connected into one by gluing, hot melting or ultrasound. The strip structure refers to a shape whose length is significantly greater than its width, and is not limited to a regular rectangular parallelepiped. For example, a strip structure with a certain curvature on the side also belongs to the above-mentioned strip structure.

[0017] Furthermore, the height of the strip structure is equivalent to the spacing between the upper and lower lead wires of the horizontal lead-acid battery, and at least one end of the strip structure along the height direction is provided with a longitudinal groove for accommodating the packaging glue; equivalent size means that the size is basically the same, that is, the same within the allowable error range. Because the strip structure has a certain elasticity, it does not damage the lead wire. Under a certain assembly pressure, the isolation barrier composed of multiple elastic components becomes the first line of defense for sealing between the cells of the horizontal lead-acid battery. At the same time, a channel can be reserved to fill the sealing medium for complete sealing; the two ends along the height direction are the upper and lower ends of the strip structure, and grooves are set at the upper and lower ends of the strip structure. During the assembly process, liquid sealing medium is injected, and its fluidity and adhesion are used to fill the reserved and potential gaps. After curing, sealing and bonding can be achieved at the same time.

[0018] Furthermore, the longitudinal groove is connected to the glue storage groove at the corresponding position of the battery shell. In other words, the groove is set as a through groove, so that when filling the liquid packaging glue, an appropriate amount of excess can be ensured to completely fill the channel, and the excess liquid packaging glue can flow out through the side opening into the gap between the battery shell and the battery shell, and the bubbles in the structure can also be discharged through the side opening, thereby improving the sealing and isolation effect.

[0019] Furthermore, the physical barrier is a double-layer or multi-layer wall with a sandwich cavity, and the wall is provided with openings or slots at the position where the lead wire passes. There are many ways to set the physical barrier, as long as the lead wire can pass through without damage and the gap can be sealed.

[0020] Furthermore, the side panels are provided with acid injection holes at the bottom of each cell, and the top of the top cover is provided with a relief valve installation hole at the top of each cell. Such a setting is not only safer, but also reduces the influence of air pressure and is more suitable for operation.

[0021] Furthermore, after the side panels and the top cover are self-locked, a sealing adhesive groove penetrating each unit cell is formed on the contact surfaces on both sides. Filling the formed sealing adhesive groove with sealant can further improve the sealing effect.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1) The present invention utilizes an isolation barrier and a sealing medium to allow dense lead wires between the horizontal lead-acid battery plates to pass through without loss, and the small gaps around the lead wires are also well sealed, which can achieve sealing between the cells of the horizontal lead-acid battery, ideally solve the problem of liquid or gas cross-flow between the cells of the horizontal lead-acid battery, reduce the self-discharge of the horizontal lead-acid battery, reduce the corrosion of the lead wires, improve the consistency of the battery core grouping, and greatly affect the performance and cycle life of the battery;

[0024] 2) The present invention uses a separate housing to solve the problem that the integral housing cannot manufacture a glue groove that meets the precision requirements due to the limitation of the manufacturing process. It can cooperate well with the isolation barrier to seal, and the manufacturing process is simple, the design space is large, and a positioning structure and a glue injection channel can be added. The fastening method of the top cover and the side plate can withstand a certain assembly pressure of the battery assembly, which can save the pressure frame components in the existing structure, is conducive to lightweight batteries, and the battery assembly method is also more flexible;

[0025] 3) The present invention adopts an independent side plate, which increases the design freedom of the side plate. A negative electrode active material accommodating groove can be set at the position of the inner wall of the side plate corresponding to the negative electrode plate, providing a certain accommodating space for the expanded negative electrode active material in the extension direction of the negative electrode plate. Under the assembly pressure of the battery shell, the expanded negative electrode active material will preferably extend in both directions, and will not climb along the edge gap of the electrode plate and then contact the positive electrode plate to short-circuit, thereby improving the comprehensive performance and service life of the battery;

[0026] 4) The complete sealing of different cells of the present invention allows the busbar to be separated from the acid-containing space where the electrolyte exists, which can greatly reduce the corrosion of the busbar and extend the service life of the battery;

[0027] 5) The isolation barrier of the present invention is cleverly designed, allowing lead wire to pass through without causing damage to the lead wire, and the gap is not too large, so it can be completely filled and sealed with a sealing medium. Through the design of different structures of the isolation barrier, it can even be equivalent to a multi-layer isolation effect, and the sealing effect is very reliable.

Brief Description of the Drawings

[0028] Figure 1 A schematic diagram of a battery cell of a conventional horizontal lead-acid battery;

[0029] Figure 2 This is a schematic diagram of an exploded view of a horizontal lead-acid battery of Example 1 (the sealing medium is not shown);

[0030] Figure 3 The top view, side view, bottom view and cross-sectional view of the strip structure of Example 1 (the leftmost side is the cross-sectional view along the AA direction, the rightmost side is the right side view, and the three middle views are the top view, the front view or the rear view, and the bottom view from top to bottom, the same below);

[0031] Figure 4 This is a schematic diagram of the battery core assembly of Example 1;

[0032] Figure 5 It is an enlarged view of the local M;

[0033] Figure 6 is a schematic diagram of the inner wall of the side plate of the first embodiment;

[0034] Figure 7 is a top view of the side panel of the first embodiment;

[0035] Figure 8 It is a cross-sectional view of the side panel of the first embodiment along the line AA;

[0036] Fig. 9 is a schematic diagram of the inner wall of the bottom plate of Example 1;

[0037] Fig.10 is a schematic diagram of the top cover of the first embodiment;

[0038] Fig.11 is a side sectional view of the top cover of the first embodiment;

[0039] Fig.12 It is a schematic diagram of the combination of the top cover and the side panels of the first embodiment;

[0040] Fig.13 is a schematic diagram of a strip structure of Example 2;

[0041] Fig.14 is a schematic diagram of the strip structure of Example 3;

[0042] Fig.15 is a schematic diagram of a rubber strip of Embodiment 4;

[0043] Fig.16 is a schematic diagram of a side panel of Embodiment 5;

[0044] Fig.17 is a schematic diagram of the side panels and top cover of the sixth embodiment;

[0045] Fig.18 This is a schematic diagram of the isolation barrier of Example 7. [Specific implementation method]

[0046] The present invention is further described in detail with specific embodiments below, but the present invention is not limited to the following specific embodiments. The direction description in the present invention is based on the plane where the pole plate is located as the horizontal plane, and the plane where the battery bottom shell is located as the reference plane. The longitudinal, transverse and vertical directions correspond to the length, width and height directions of a certain three-dimensional structure respectively; the lead wire described in this article can also be an alloy lead wire or a composite lead wire and other wires with the same effect as the lead wire. The strip structure refers to a shape whose length is significantly greater than the width, and is not limited to a regular rectangular parallelepiped. For example, a side with a certain curvature also belongs to the above-mentioned strip structure. The shape of the final sealing medium is determined by the space for accommodating the sealing medium, so the sealing medium is not shown in the schematic diagram. Comparable size means that the size is basically the same, that is, the same within the allowable error range. Top, bottom, left, right, top, side, and both sides refer to the relative orientation description with reference to the accompanying drawings, and do not limit the absolute position.

[0047] The schematic diagram of the battery cell of a conventional horizontal lead-acid battery in the prior art is as follows Figure 1 As shown, a positive electrode active material is coated on one side of the grid to form a positive electrode plate 1, and a negative electrode active material is coated on the other side to form a negative electrode plate 2; the positive electrode plate 1 and the negative electrode plate 2 are separated by a separator 3 and are horizontally staggered and stacked according to a certain position; the exposed wire of the grid is a lead wire 5, which plays a role in transmitting current; Figure 1 There are three groups of battery pole groups, which are equivalent to three battery cells 4; the two ends of the battery core are positive terminal plates and negative terminal plates, the positive terminal plate has only one side coated with positive active material, and the other side is used as the positive output end of the battery core, while the negative terminal plate has only one side coated with negative active material, and the other side is used as the negative output end of the battery core.

[0048] The horizontal lead-acid battery of the present invention is very suitable for batteries with multiple battery pole groups because of the good sealing of the cells. It can also be placed in any direction, not limited to being placed horizontally. If the linear structure occupies too much space, the battery pole group combination can be designed into a left-right "U"-shaped structure and an upper-lower "U"-shaped structure, and the space volume can be adjusted by using a structure similar to the side plate or the bottom plate as a partition to separate them. For the upper-lower "U"-shaped structure, the partition is horizontally arranged, and the side plate is provided with a positioning portion fixedly matched with the horizontally placed partition. The upper surface of the partition is the same as the inner surface of the bottom plate, and the lower surface of the partition is the same as the inner surface of the top cover. For the left-right "U"-shaped structure, the partition is vertically arranged, and the bottom plate and the top cover are provided with a positioning portion fixedly matched with the vertically placed partition. The left side of the partition is the same as the inner surface of the right side plate, and the right side is the same as the inner surface of the left side plate.

[0049] The embodiments provided below are not intended to limit the scope of the present invention, nor are the steps described to limit their execution order, and the directions described are limited to the drawings. Those skilled in the art may make obvious improvements to the present invention in combination with existing common knowledge, which also fall within the scope of protection claimed by the present invention.

[0050] Embodiment 1

[0051] A horizontal lead-acid battery, the main structure of which is shown in the exploded diagram Figure 2 As shown, it includes a battery shell and a plurality of battery pole groups arranged in the battery shell, the battery pole group includes a positive terminal plate, a plurality of stacked quasi-bipolar plates, and a negative terminal plate, which are collectively referred to as plates 6 in this embodiment without distinction; a diaphragm for absorbing acid and isolating the positive and negative plates is provided between the positive and negative plates, one end of the quasi-bipolar plate is coated with a positive active material, the other end is coated with a negative active material, and a section of exposed lead wire 5 is left in the middle for electrical connection of the positive and negative plates. The structure between two adjacent rows of lead wires 5 is called a unit cell. Figure 1 and Figure 2 The batteries are illustrated using three cells as an example.

[0052] In this embodiment, an isolation barrier is provided between adjacent cells for the lead wire 5 to pass vertically and isolate the flow of liquid and / or gas between different battery pole groups. The isolation barrier is composed of a plurality of elastic strip structures 7 made of rubber material arranged in combination. The height of each strip structure 7 is equivalent to the spacing between the upper and lower layers of lead wires in the horizontal lead-acid battery. The upper end of the strip structure 7 is provided with a longitudinal groove 701 extending to both sides, and the bottom end is a plane. Figure 3 As shown; the longitudinal groove 701 can accommodate a sealing medium such as epoxy glue, and the lead wire 5 is sandwiched between the upper and lower adjacent strip structures and connected into one piece by the epoxy glue filled in the longitudinal groove 701, as shown Figure 4 and Figure 5 Because the strip structure 701 has a certain elasticity, it does not damage the lead wire 5; under a certain assembly pressure, the multiple elastic strip structures 7 can be in close contact with basically no pores, which becomes the first line of defense for sealing between the cells of the horizontal lead-acid battery. At the same time, the longitudinal groove 701 can be filled with a sealing medium to ensure that there are no pores, making the seal completely reliable; the longitudinal groove 701 is connected to both sides to form an opening, which can not only discharge gas during glue injection, but also move the glue injection process to a later stage and inject glue uniformly after assembly is completed.

[0053] 14. In order to install the isolation barrier in the battery shell and form a seal at the intersection with the battery shell, the battery shell of this embodiment is configured to be separated and assembled from a separate side plate 110, a bottom plate 120 and a top cover 130. Figures 6 to 8 is a schematic diagram of the side panel. Fig. 9is a schematic diagram of the base plate. Figures 10-11 A schematic diagram of the top cover. Fig.11 It is a schematic diagram of the combination of the side panel and the top cover. The inner side surfaces of the two side panels 110, the bottom panel 120 and the top cover 130 are all provided with glue injection grooves, and after the combination, an annular glue groove for accommodating sealant is formed around the isolation member. The side panel 110 is provided with a positioning surface 111, and the bottom panel is provided with a positioning groove 121. The positioning surface 111 and the positioning groove 121 cooperate to bond the side panel 110 and the bottom panel 120 together. The combination of the side panel 110 and the bottom panel 120 preferably cooperates with the positioning of the surface and the groove. The positioning surface can be set on the bottom panel, and the positioning groove can be set on the side panel. The edge of the top cover 130 is provided with a dovetail platform 131, and the position corresponding to the two side panels 110 and the dovetail platform 131 is provided with a dovetail groove 113. The cooperation between the two can make the side panel 110 and the top cover 130 self-locking and fixed. After self-locking, a sealant groove that runs through each unit cell is formed on the contact surface on both sides. This structure can not only form a sealed container, but also withstand a certain assembly pressure. It does not require an additional pressure frame and allows a larger assembly pressure to exist inside the battery, which is conducive to simplifying assembly and reducing the total weight of the battery.

[0054] The battery's air release valve 133 is provided on the top cover 130 to discharge excess gas from the battery. For safety reasons, each sealed cell (corresponding to each group of battery poles) should be provided with a air release valve. The fitting gap 134 between the top cover and the side plate is sealed by epoxy glue; similarly, the fitting gap between the side plate and the bottom plate is also sealed by epoxy glue. The shape of the glue injection groove 112 cannot be limited, and it only needs to be able to accommodate the sealing medium; however, for further positioning, the two edges 115 forming the glue injection groove 112 are preferably slightly higher than the plane of the flat plate, so as to facilitate the simultaneous positioning and glue injection functions.

[0055] Isolation barriers are provided on both sides of each cell, and the cells at both ends can be sealed, so that the busbar 9 can be separated from the acid storage space, which can further reduce corrosion, and even the end cap 11 is not necessary. An isolation barrier is provided between the busbar 9 and the acid storage space, which can reduce the corrosion of the busbar and is conducive to improving the battery life and performance.

[0056] The assembly of the horizontal lead-acid battery of this embodiment can first assemble the battery core: on the bottom plate 120, assemble a layer of strip structure 7, assemble a layer of diaphragm 3 and electrode plate 6, inject glue into the longitudinal groove 701 at the upper end of the strip structure 7, assemble another layer of isolation member 7, assemble another layer of diaphragm 3 and electrode plate 6, place the set number of layers in a cycle, assemble the two side plates 110, inject epoxy glue into the glue injection groove, bond and seal, install the battery casing under a certain assembly pressure, assemble and tighten the top cover 130 and the side plate 110, add glue, cure the sealing medium, and then assemble the bus, terminal, end cover and upper cover to complete the assembly (this is a simplified assembly process, and the assembly of detailed accessories is not included).

[0057] Embodiment 2

[0058] The difference between the second embodiment and the first embodiment is that the strip structure 7 is provided with a groove for accommodating the packaging glue at the upper end, but it does not penetrate to the left and right sides; two parallel, narrow grooves for accommodating the packaging glue are provided at the lower end and penetrate to the left and right sides to form an opening, such as Fig.12 As shown. Under a certain assembly pressure, the wall of the groove formed by this structure is equivalent to forming a multi-layer isolation wall, and the sealing and isolation effect is better.

[0059] Embodiment 3

[0060] The difference between this embodiment and the first embodiment is that the strip structure 7 is provided with three symmetrical grooves at the upper and lower ends for accommodating the packaging glue, and the grooves are connected to the left and right sides to form openings, such as Fig.13 As shown. The width of the middle groove of the three parallel grooves is larger, and the width of the grooves on both sides is narrower; such grooves with different widths set in a certain proportion can add excess packaging glue to the middle groove to ensure that the sealing glue in the middle groove forms an isolation effect without gaps and cracks after curing. The excess glue will be squeezed and flow to the narrow grooves on both sides, leaving a certain space for accommodating the excess glue, which is equivalent to forming a multi-layer isolation effect, achieving an ideal sealing isolation effect between cells.

[0061] The assembly of the horizontal lead-acid battery of this embodiment can be performed by first assembling the battery core: assembling a layer of strip structure 7, assembling a layer of diaphragm 3 and electrode plate 6, injecting glue into the longitudinal groove 701 at the upper end of the strip structure 7, and curing to form a single-layer battery core; then positioning and welding the multi-layer battery core and the bottom plate 120, and then assembling the two side plates 110, injecting sealant into the glue injection groove, bonding and sealing, and installing the battery shell under a certain assembly pressure, assembling and tightening the top cover 130 and the side plate 110, and then filling the glue, curing the sealing medium, and then assembling the bus, terminals, end covers and upper covers to complete the assembly.

[0062] Embodiment 4

[0063] The difference between this embodiment and the first embodiment is that the isolation barrier of the battery is composed of two layers of walls, a cavity is formed between the two adjacent walls, and the cavity is filled with a sealing medium, such as a colloid or plastic, which can be cured by heating to play a sealing and bonding role; each layer of the wall is composed of a plurality of rubber strips 402 arranged, such as Fig.15 , the lead wire passes between the upper and lower rubber strips.

[0064] The assembly of the horizontal lead-acid battery of this embodiment can be performed by first assembling the battery core: on the bottom plate, assemble a layer of strip structure 402, assemble a layer of diaphragm 3 and electrode plate 6, assemble another layer of isolation member 7, assemble another layer of diaphragm 3 and electrode plate 6, pass the lead wire 5 between the upper and lower strip structures 402, place the set number of layers in a cycle, assemble the two side plates 110, inject epoxy glue into the glue injection groove, let it flow and fill the cavity between the two wall layers, install the battery casing under a certain assembly pressure, assemble and tighten the top cover 130 and the side plate 110, inject the sealing medium through the glue injection hole, solidify, and then assemble the bus, terminal, end cover and upper cover to complete the assembly (this is a simplified assembly process, and the assembly of detailed accessories is not included).

[0065] Embodiment 5

[0066] The difference between the fifth embodiment and the first embodiment is that the side plate 510 is provided with a positioning surface 513 for bonding or welding with the bottom plate, and the bottom plate is provided with a positioning groove matching the positioning surface, and the side plate 510 and the bottom plate are sealed and fixedly connected by bonding or welding the positioning surface 513 with the positioning groove. The side plate 510 is provided with a negative electrode active material containing groove 513 in the extending direction of each negative electrode plate, such as Fig.16 , the negative electrode active material storage tank 513 is separated from any positive electrode plate, that is, the storage tank 513 does not contact any positive electrode plate. The storage tank 513 can provide a certain amount of storage space for the expanded negative electrode active material in the extension direction of the negative electrode plate. Under the assembly pressure of the battery shell, the expanded negative electrode active material will preferably extend in both directions, and will not climb along the edge gap of the electrode plate and then contact and short-circuit with the positive electrode plate, thereby improving the comprehensive performance and service life of the battery. Based on the direction shown in the figure, the height T of the negative electrode active material storage tank 513 is generally 0.5 to 2 mm greater than the thickness of the negative electrode plate, and the length is equivalent to the length of the negative electrode plate. The depth d of the tank is 0.5 to 5 mm.

[0067] Embodiment 6

[0068] The difference from the first embodiment is that the side panels and the top cover of the third embodiment are not assembled by dovetails, but by pins or screws, such as Fig.17 As shown. The side plate 310 is provided with a nail hole 316, and the corresponding position of the edge of the top cover 330 is also provided with a hole, and the two are fastened together by a pin or a screw 360. The exhaust valve 333 is provided on the top cover 330, and the matching gap 334 between the top cover 330 and the side plate 310 is sealed by a sealant; similarly, the matching gap between the side plate 310 and the bottom plate 320 is also sealed by a sealant.

[0069] Embodiment 7

[0070] The difference between the seventh embodiment and the first embodiment is that the isolation barrier of the battery is an integrally formed structure, and a plurality of connecting strips are fixed at the top and the bottom so that the two vertical walls form a fixed distance, such as Fig.18 As shown, the interior of the isolation wall is provided with a cavity filled with a curable fluid, such as a colloid or plastic, which can be cured by heating to achieve sealing and bonding effects. The isolation barrier is also provided with a corresponding slit for the lead wire to pass through.

[0071] Comparison of technical effects:

[0072] Table 1 Horizontal battery self-discharge and cycle life

[0073]

Claims

1. A horizontal lead-acid battery, characterized in that: The invention comprises a battery shell and a plurality of battery pole groups arranged in the battery shell, wherein the battery pole group comprises a positive terminal plate, a plurality of stacked quasi-bipolar plates, and a negative terminal plate, wherein a diaphragm for absorbing acid and isolating the positive terminal plate and the negative terminal plate is arranged between the positive terminal plate and the negative terminal plate, wherein one end of the quasi-bipolar plate is coated with a positive electrode active material, and the other end is coated with a negative electrode active material, and a section of bare lead wire for electrical connection between the positive and negative plates is left in the middle, and the structure between two adjacent columns of lead wire is a unit cell, and an isolation barrier is arranged between adjacent units for vertical passage of lead wire and isolation of liquid and / or gas flow between different battery pole groups, and the isolation barrier is composed of a plurality of elastic strip structures of rubber material, and the height of each strip structure is equivalent to the spacing between the upper and lower layers of lead wire of a horizontal lead-acid battery; a longitudinal groove is arranged at the upper end of the strip structure and passes through both sides, and the bottom end is a plane; an epoxy adhesive sealing medium can be accommodated in the longitudinal groove, and the lead wire is sandwiched between the upper and lower adjacent strip structures and connected into one body by the epoxy adhesive filled in the longitudinal groove; The battery casing is configured to be separate and is assembled from separate side panels, a bottom panel and a top cover. The inner sides of the two side panels, the bottom panel and the top cover are all provided with glue injection grooves. After being assembled, an annular glue groove for accommodating sealant is formed around the isolating member. The side panel is provided with a positioning surface, and the bottom panel is provided with a positioning groove. The positioning surface is provided on the bottom panel, and the positioning groove is provided on the side panel. The positioning surface and the positioning groove cooperate to bond the side panel and the bottom panel together. A dovetail platform is provided on the edge of the top cover, and dovetail grooves are provided at the positions corresponding to the dovetail platforms on the two side panels. The cooperation between the two can make the side panel and the top cover self-locking and fixed. After self-locking, The contact surfaces on both sides form a sealant groove that runs through each unit cell; the side plate is provided with a positioning surface for bonding with the bottom plate, and the bottom plate is provided with a positioning groove that matches the positioning surface. The side plate and the bottom plate are sealed and fixedly connected by bonding the positioning surface and the positioning groove. The side plate is provided with a negative active material accommodating groove in the extension direction of each negative terminal plate. The negative active material accommodating groove is separated from any positive terminal plate. The height T of the negative active material accommodating groove is 0.5 to 2 mm greater than the thickness of the negative terminal plate, and the length is equivalent to the length of the negative terminal plate. The groove depth d is 0.5 to 5 mm; The battery's air release valve is set on the top cover to discharge excess gas from the battery. Each sealed cell is provided with a air release valve. The fitting gap between the top cover and the side plate is sealed by epoxy glue, and the fitting gap between the side plate and the bottom plate is sealed by epoxy glue. Isolation barriers are set on both sides of each cell to seal the cells at both ends to separate the bus from the acid-containing space, further reducing corrosion. An isolation barrier is set between the bus and the acid-containing space.

2. The method for assembling a horizontal lead-acid battery according to claim 1, characterized in that: First, assemble the battery core, assemble a layer of strip structure on the bottom plate, assemble a layer of diaphragm and electrode plate, inject glue into the longitudinal groove at the upper end of the strip structure, assemble another layer of separator, assemble another layer of diaphragm and electrode plate, place the set number of layers in a cycle, assemble the two side plates, inject epoxy glue into the glue injection groove, bond and seal, install the battery casing under a certain assembly pressure, assemble and tighten the top cover and side plates, add glue, solidify the sealing medium, and then assemble the bus, terminals, end covers and upper covers to complete the assembly.

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