Tubular lead-acid storage battery

Abstract

The tubular lead-acid storage battery comprises a positive plate, a negative plate and a plate group lower pad, the positive plate comprises a calandria and a positive plate grid inserted into the calandria, the bottom of the calandria is provided with a hollow back cover, the top of the back cover is provided with a plurality of hollow supporting blocks inserted into the calandria, and the bottom of the back cover is provided with a plurality of hollow supporting blocks inserted into the calandria. And the positive grid consists of a cross beam and a plurality of lead ribs. The tip-shaped positive electrode lead rib extends out along the hole in the back cover along with the growth and is inserted into the plate group lower pad at the bottom of the plate group, the growth process is not restrained by the grid cross beam and the plate group lower pad, the cross beam cannot be stressed and deformed, the tube bank is prevented from being separated from sealing elements at the upper part and the lower part of the plate, and the integrity of the positive plate is ensured; in addition, the lead ribs of the positive plate are continuously inserted into the plate group lower pad, the basic size of the plate group lower pad is not changed, and the plate group lower pad can still play a role in supporting the plate group.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lead -acid battery technical field especially relates to a tubular lead -acid battery. BACKGROUND

[0002] The tubular lead -acid battery is a special type of lead -acid battery, and the positive plate is composed of a plurality of tubular structures. During the use of the lead -acid battery, with the continuous charging and discharging cycle of the battery, the lead paste of the lead -acid battery periodically expands and shrinks. The lead rib attached by the lead paste is extruded by the lead paste to produce a spreading effect, which is irreversible, and eventually leads to the continuous spreading of the grid. This effect is called the growth of the plate.

[0003] The tubular positive plate is more prominent due to its special structure. The tubular positive plate is made by inserting lead ribs into tubular pipes and filling active material in the pipes. The metal lead rib is wrapped in thick active material, so during the discharge expansion of the active material, the lead rib will be extruded in the longitudinal direction. The lead rib subjected to the longitudinal extrusion force can only grow in the direction perpendicular to the diameter, i.e. the height direction of the plate. Due to the limited growth direction dimension, the growth rate of the tubular grid lead rib is obvious, which easily causes the sealers on the upper and lower parts of the pole group to gradually separate from the pipes, causing the material in the plate to leak, and further causing the battery to fail prematurely. At the same time, the reaction material attached to the negative plate is sponge lead, which has low density and high compressibility. The volume change of the battery during use causes relatively small pressure on the grid, and the production phenomenon of the negative plate is not obvious.

[0004] The current industry solution to the internal growth of the battery is basically the same treatment for positive and negative plates without distinction. This causes the positive plate pressure to be released while causing the negative plate to be suspended and fail. UTILITY MODEL CONTENTS

[0005] The utility model provides a growth space for the positive plate while not affecting the performance of the negative plate, and proposes the following technical scheme to solve the problem of the excessive growth rate of the lead rib of the positive plate of the tubular lead -acid battery in the prior art, which causes the battery to fail prematurely.

[0006] A tubular lead -acid battery, comprising: a positive plate, a negative plate and a pole group lower pad, the positive plate comprises a pipe and a positive grid inserted into the pipe, the bottom of the pipe is provided with a sealed bottom with a hollow support block inserted into the pipe, the positive grid is composed of a cross beam and a plurality of lead ribs, the end of the lead rib is provided in a pointed shape, and the lead rib of the positive grid is inserted into the corresponding hollow support block of the sealed bottom.

[0007] As the preferred technical scheme of the above, the hollow support block is internally circumferentially provided with a plurality of support protrusions, the support protrusions are attached to the surface of the lead rib of the positive grid, and the plurality of hollow support blocks are integrally formed with the bottom cover.

[0008] As the preferred technical scheme of the above, the positive plate further comprises an upper sheath, the upper sheath is arranged at the top of the pipe, and the positive active material layer is arranged inside the pipe between the upper sheath and the bottom cover.

[0009] As the preferred technical scheme of the above, further comprising: a shell, the shell is provided with a pole at the top, the pole is connected with the positive plate or the negative plate through the corresponding connecting piece, and the battery unit is formed.

[0010] The beneficial effects of the utility model are:

[0011] 1. The positive lead rib in the shape of a sharp end will grow along the hole inside the bottom cover and insert into the flexible member at the bottom of the pole group. The growth process is not restricted by the grid beam and the lower pad of the pole group, and will not cause the deformation of the beam under stress. At the same time, the separation of the pipe and the upper and lower sealing members of the pole plate is avoided, the integrity of the positive plate is ensured, the leakage of the material inside the pipe is avoided, the continuous insertion of the positive plate lead rib into the lower pad of the pole group does not change the basic size of the lower pad of the pole group, and the lower pad of the pole group can still support the pole group, thereby protecting the negative plate.

[0012] 2. When the lead rib is inserted into the support protrusion in the bottom cover, the support protrusion is deformed, the gap between the protrusion and the lead rib is effectively filled, and the friction between the two is increased. The interference fit between the two provides a large friction force to prevent the bottom cover from falling off, effectively fills the gap between the bottom cover and the lead rib, and avoids the leakage of the active material inside the pipe. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The overall structure schematic diagram of the embodiment is shown;

[0014] Figure 2 The installation position diagram of the positive plate in the embodiment is shown;

[0015] Figure 3 The structure diagram of each part of the positive plate in the embodiment is shown;

[0016] Figure 4 The enlarged view of A part in the embodiment is shown; Figure 3

[0017] Figure 5 The top view of the hollow support block in the embodiment is shown;

[0018] Figure 6 The growth schematic diagram of the positive lead rib in the embodiment is shown. ​

[0019] Fig. 10, positive plate; 11, tube; 121, crossbeam; 122, lead bar; 13, bottom seal; 14, hollow support block; 141, support protrusion; 15, upper sheath; 16, positive active material layer; 20, negative plate; 30, group lower pad; 40, shell; 41, pole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with embodiments and the drawings of the specification.

[0021] EMBODIMENT

[0022] Problem causes:

[0023] When the battery is discharging, the positive active material lead dioxide involved in the reaction will be converted into lead sulfate. Because the molar volume of the solid product lead sulfate is 92% larger than that of the lead dioxide involved in the reaction, the grid is subjected to the extrusion of the lead paste. When charging, the volume changes in the opposite direction, that is, the volume of the active material involved in the reaction will decrease by 92%. The grid, which is generally made of lead alloy, is subjected to the continuous extrusion of the reaction product, which will cause the deformation of the grid and eventually lead to the growth of the positive grid.

[0024]

[0025] The negative active material lead involved in the reaction will be converted into lead sulfate. Because the molar volume of the solid product lead sulfate is 164% larger than that of the lead involved in the reaction, the volume increase of the product will cause the reaction product itself to be more dense, and the pressure on the grid is smaller. The size of the negative plate does not increase substantially during use.

[0026]

[0027] During the charging and discharging cycle of the battery, the volume of the lead paste changes periodically. When the battery is discharging, the volume of the active material increases; but when charging, the volume of the active material decreases to return to the state before discharging. The process of the growth of the lead bar under the extrusion of the active material is irreversible, and at the same time, as the number of battery cycles increases, the amount of active material involved in the charging and discharging reaction increases continuously, which will cause the volume change of the active material during the charging and discharging process to be larger, and eventually lead to the continuous acceleration of the growth of the lead bar.

[0028] SOLUTION

[0029] Figures 1-6In the present application, a tubular lead-acid battery comprises a positive plate 10, a negative plate 20 and a bottom pad 30 for the pole group, which is made of high-density foam and can provide support for the whole battery. The tip of the lead rib 122 of the positive grid can be easily inserted into the bottom pad 30 without damaging the integrity of the flexible part, so the bottom pad 30 can also support the whole positive plate 10 and the negative plate 20. The positive plate 10 comprises a tube 11 and a positive grid inserted into the tube 11. The bottom of the tube 11 is provided with a bottom cover 13 with hollow support blocks 14 inserted into the tube 11. The positive grid is composed of a crossbeam 121 and a plurality of lead ribs 122. The end of the lead rib 122 is designed as a sharp tip. The lead rib 122 of the positive grid is inserted into the corresponding hollow support block 14.

[0030] As the battery charging and discharging cycle proceeds, the lead rib 122 grows continuously, and the growing lead rib 122 gradually extends along the hole inside the bottom cover 13 and gradually inserts into the bottom pad 30 of the pole group. During this process, the position of the seal of the positive plate 10 and the tube 11 remains unchanged, so there is no separation phenomenon between the upper and lower seals of the pole plate and the tube 11. The tip of the lead rib 122 is designed as a sharp tip, which facilitates the insertion of the lead rib 122 into the bottom cover 13 and the bottom pad 30 of the pole group. The end of the lead rib 122 continuously inserts into the bottom pad 30 of the pole group as it grows, without causing the crossbeam 121 to deform under stress, and without causing the tube 11 to separate from the upper and lower seals of the pole plate, ensuring the integrity of the positive plate 10 and preventing leakage of the contents of the tube 11. At the same time, the growth of the lead rib 122 of the positive grid is not restricted by the crossbeam 121 of the grid and the bottom pad 30 of the pole group, better protecting the grid lead rib 122 and the crossbeam 121. The positive grid can continuously insert into the bottom pad 30 of the pole group without causing the bottom pad 30 of the pole group to compress under stress. The thickness of the bottom pad 30 of the pole group remains unchanged, which can continuously provide support to the negative plate and the positive plate, and provide more growth allowance for the lead rib 122. The bottom pad 30 of the pole group can be made of relatively high-strength foam or EVA materials.

[0031] Figures 3-5 In the present application, the hollow support block 14 is provided with a plurality of support protrusions 141 around the inside. The support protrusions 141 are in close contact with the surface of the lead rib 122 of the positive grid. When the lead rib 122 is inserted into the bottom cover 13, it will extrude the support protrusions 141 inside the bottom cover 13, causing the support protrusions 141 to deform and fill the gap between the lead rib 122 and the bottom cover 13, ensuring the sealing of the bottom cover 13 and the lead rib 122, and increasing the friction between the bottom cover 13 and the lead rib 122, which is conducive to the cooperation between the bottom cover 13 and the tube 11. The plurality of hollow support blocks 14 are integrally formed with the bottom cover 13.

[0032] The support protrusion 141 completes the close fit of the bottom sealing plate 13 and the discharge pipe 11 by the friction with the lead bar 122, prevents the leakage of the active substance in the discharge pipe 11 and the falling of the bottom sealing plate 13. The lead bar 122 penetrates into the bottom sealing plate 13, causes the deformation of the protrusion part in the bottom sealing plate 13, can provide greater friction to prevent the bottom sealing plate 13 from falling, and can effectively fill the gap between the bottom sealing plate 13 and the lead bar 122, avoiding the leakage of the active substance in the discharge pipe 11.

[0033] Figures 2-3 In the specific embodiment, the positive plate 10 further comprises an upper sheath 15, the upper sheath 15 is arranged at the top of the discharge pipe 11, and a positive active material layer 16 is arranged in the discharge pipe 11 between the upper sheath 15 and the bottom sealing plate 13.

[0034] Figures 1-2 In the specific embodiment, the shell 40 is further provided with a pole 41 at the top, the pole 41 is connected with the positive plate 10 or the negative plate 20 through a corresponding connecting piece, and a battery cell is formed.

[0035] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them.

Claims

1. A tubular lead-acid battery comprising: The positive plate (10), the negative plate (20) and the group lower pad (30), the positive plate (10) includes the row pipe (11) and the positive grid inserted into the row pipe (11), characterized by, the bottom of the row pipe (11) is provided with the bottom sealing (13) of hollow setting, the top of the bottom sealing (13) is provided with a plurality of hollow support blocks (14) inserted into the row pipe (11), the positive grid is composed of crossbeam (121) and a plurality of lead bars (122), the end of the lead bar (122) is provided with a pointed end, the lead bar (122) of the positive grid is inserted into the corresponding hollow support block (14).

2. A tubular lead-acid battery according to claim 1, characterised in that, The inside of the hollow support block (14) is provided with a plurality of support protrusions (141) circumferentially, the support protrusions (141) are attached to the surface of the lead bar (122) of the positive grid, and a plurality of the hollow support blocks (14) are integrally formed with the bottom sealing (13).

3. A tubular lead-acid battery according to claim 1, characterised in that, The positive plate (10) further includes an upper sheath (15), the upper sheath (15) is arranged on the top of the row pipe (11), and the inside of the row pipe (11) between the upper sheath (15) and the bottom sealing (13) is provided with a positive active material layer (16).

4. A tubular lead-acid battery according to claim 1, characterized in that Further comprising: The shell (40) is provided with a pole (41) on the top, the pole (41) is connected with the positive plate (10) or the negative plate (20) through the corresponding connecting piece, and the battery unit is formed.

Images