CN217903204U - But elongated tubular lead acid battery utmost point crowd - Google Patents

Abstract

A kind of can lengthen tubular lead acid battery pole group, this pole group is formed by more than one positive plate and more than one negative plate alternate interval stack; the bottom of the positive plate is integrally butted with a compressible hollow plastic sheet; and two lead alloy feet are symmetrically arranged at the bottom of the negative plate along the central axis of the negative plate. The utility model does not need to pad a flexible part for growth at the bottom of the lead-acid battery plate group, and the positive and negative plates can meet the growth demand of the positive and negative plates; through adjusting the negative plate design that can increase respectively well in order to realize adjusting the problem that negative plate growth rate is different well, separately control, it is more reasonable, reduced lead acid battery's the equipment degree of difficulty, give more meticulous control scheme to the increase of lead acid battery life cycle inner polar plate simultaneously.

Description

But elongated tubular lead acid battery utmost point crowd

Technical Field

The utility model belongs to the technical field of lead acid battery, in particular to can grow tubular lead acid battery utmost point crowd.

Background

The tubular lead-acid battery belongs to one kind of lead-acid battery. The positive plate of the battery is in a tubular structure, and the negative plate of the battery is in a flat plate structure. In the use process of the lead-acid battery, along with the continuous charge and discharge circulation of the battery, the reaction mass on the surface of the grid is continuously expanded and reduced, and the grid is corroded, so that the polar plate is continuously grown. When the battery is discharged, part of the anode lead dioxide is reduced into lead sulfate. The molar volume of the newly generated solid product lead sulfate is 92 percent larger than that of the lead dioxide participating in the reaction. On charging, the change in volume is reversed, i.e. the volume of the material participating in the reaction is reduced by 92%. In the process of changing the reaction volume continuously, the grid serving as a reactant bearing body is extruded continuously by the reactants and is corroded continuously by sulfuric acid, and the grid can be elongated continuously. Eventually leading to growth of the positive plate.

And in the charge-discharge cycle process, the reactant is mainly spongy lead, and the lead sulfate formed by discharge mainly causes the reactant to be more compact and has smaller pressure on a grid. Therefore, the negative plate does not substantially grow during use.

Considering that the growth of lead-acid batteries during use is inevitable, it is a more important issue to consider for long-life batteries. The growth of the polar plate needs to reserve a growth space on the design of the battery, so that the shell cover is prevented from being stressed and cracked, and the polar plate is prevented from being cracked. Meanwhile, the surface of the tubular battery anode plate is wrapped by the calandria, so that the anode plate cannot be increased in the horizontal direction, and the increase of the anode plate in the vertical direction is further increased. Therefore, in order to avoid battery failure caused by the increase of the battery pole group in the vertical direction due to the increase of the battery pole group, two designs, namely an increase-on-pole-group design and an increase-under-pole-group design, are mainstream in the industry at present.

For the pole group growth design, when the pole group is designed to be sealed, the interference fit between the rubber sealing ring and the battery cover is used, the pole group is sealed, and meanwhile, when the battery pole group is allowed to grow, the terminal is gradually raised along with the growth of the pole group. However, the height of the positive electrode and the height of the negative electrode of the battery are different because the positive electrode of the battery is mainly increased and the negative electrode is not basically increased. When the battery pack is used, batteries with different numbers are required to be connected in series to achieve required voltage, and when the battery pack is installed, the heights of the positive and negative electrodes of the adjacent batteries are consistent, and the connection is tight. However, as the battery is used, the growth rate of the positive electrode is much higher than that of the negative electrode, so that the heights of the positive electrode and the negative electrode at two ends of the same connecting wire are different. However, for a power-discharging battery, the battery is typically hard-wired using copper bars to meet the discharge requirements. And the terminal is affected by the stress of the connection wire to accelerate the damage of the battery. Meanwhile, the increase design on the pole group only allows the increase of the battery pole group not more than 8mm generally due to the limited size of the terminal matched with the battery cover, the height is limited, and once the increase exceeds the design, the service life of the pole group is terminated in advance.

For the under-pole group growth design, a compressible flexible part is generally padded under the pole group, and the flexible body is generally foam, PE and the like. As the pole group grows, the compliant member at the bottom of the pole group is progressively compressed. But because of the flexible piece is whole pad in utmost point crowd lower part, increase at the positive plate and push down the flexible piece, when leading to the reduction of flexible piece thickness, can cause the negative plate that does not basically increase to be lifted up by the positive plate and unsettled gradually, and then lead to the positive plate to receive bigger pressure, the damage of positive plate with higher speed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can increase long tubular lead acid battery utmost point crowd to the not enough of prior art existence, concrete technical scheme as follows:

a kind of can lengthen tubular lead acid battery pole group, this pole group is formed by more than one positive plate and more than one negative plate alternate interval stack;

the bottom of the positive plate is integrally butted with a compressible hollowed plastic sheet;

and two lead alloy feet are symmetrically arranged at the bottom of the negative plate along the central axis of the negative plate.

Further, the positive plate comprises a positive plate grid, the positive plate grid is formed by connecting a plurality of lead ribs in parallel, each lead rib is axially sleeved with a discharge pipe, a tube cavity of the discharge pipe is filled with a paste lead dioxide reactant, a top opening of the discharge pipe is axially sealed through an upper sheath, and a bottom opening of the discharge pipe is axially sealed through a plastic bottom seal; the lower parts of the plastic back covers are integrally butted with the hollowed-out plastic sheets.

Furthermore, the hollowed-out plastic sheet is a polypropylene elastomer grid sheet, and the outer contour of the hollowed-out plastic sheet is in an inverted isosceles trapezoid structure.

Further, the lead alloy ground feet and the grid-shaped grid body of the negative plate are integrally cast and molded by lead alloy.

Furthermore, the longitudinal section of the lead alloy ground foot is of an inverted isosceles trapezoid structure.

The beneficial effects of the utility model are that:

the utility model does not need to pad a flexible part for growth at the bottom of the lead-acid battery plate group, and the positive and negative plates can meet the growth demand of the positive and negative plates; carry out design that can increase respectively through adjusting the negative plate well in order to realize adjusting the problem that negative plate growth rate is different well, separately control, it is more reasonable, reduced lead-acid batteries's the equipment degree of difficulty, give more meticulous control scheme to the increase of lead-acid batteries life cycle inner plate simultaneously.

Drawings

FIG. 1 shows an exploded schematic view of a positive plate in a prior art tubular lead acid battery;

fig. 2 shows a schematic structural view of the positive plate of the present invention;

FIG. 3 is a front view of the assembly structure of the middle back cover and the hollowed-out plastic sheet of the present invention;

FIG. 4 is a side view of the assembly structure of the middle back cover and the hollowed-out plastic sheet of the present invention;

fig. 5 shows a schematic structural diagram of the negative plate of the present invention;

fig. 6 shows a structural cross-sectional view of the middle-tube lead-acid battery of the present invention.

Shown in the figure: 1. a positive plate; 11. a positive grid; 111. a lead bar; 112. a positive tab; 12. putting a sheath; 13. arranging pipes; 14. plastic bottom sealing; 15. hollowing out a plastic sheet; 2. a negative plate; 21. a grid body; 211. lead alloy ground feet; 212. a negative tab; 3. a bus bar; 4. a housing; 5. a battery cover; 6. a pole column; 7. a rubber seal ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 2 to 6, an extendable tubular lead-acid battery pole group is formed by alternately stacking more than one positive plate 1 and more than one negative plate 2;

the bottom of the positive plate 1 is integrally butted with a compressible hollow plastic sheet 15;

the bottom of the negative plate 2 is symmetrically provided with two lead alloy feet 211 along the central axis thereof.

By adopting the technical scheme, the flexible piece for growth is not needed to be arranged at the bottom of the lead-acid battery pole group, and the positive and negative pole plates can meet the growth requirements of the positive and negative pole plates per se; through adjusting the negative plate design that can increase respectively well in order to realize adjusting the problem that negative plate growth rate is different well, separately control, it is more reasonable, reduced lead acid battery's the equipment degree of difficulty, give more meticulous control scheme to the increase of lead acid battery life cycle inner polar plate simultaneously.

The positive plate changes a plastic back cover structure, and a compressible design is added on the basis of the original plastic back cover; as the positive plate grows, the compressible portion of the plastic back cover is progressively compressed, thereby providing increased space for the positive plate.

In order to ensure the heights of the positive and negative electrode plates to be consistent, the bottom of the negative electrode plate is designed by using lead alloy feet; the lead alloy is soft, and the lead alloy feet can be pressed and deformed when the negative plate is increased; because the negative plate is little in the deflection of use, rely on the deformation of lead alloy lower margin just can satisfy.

Above-mentioned scheme can avoid adopting the normal compression flexible piece of positive plate that current whole flexible piece design brought, the unsettled problem of negative plate that arouses.

The lower half part of the plastic back cover of the positive plate is a newly added compressible part, the lower half part of the plastic back cover has weaker bearing capacity and can only bear 2-3 times of the dead weight of the positive plate, so that the normal assembly, transportation and use of the lead-acid battery in the early stage are ensured. When the positive plate grows along with the use process, the hollow plastic sheets can be gradually flattened by the growing and increasing force of the positive plate, but the positive plate is not crushed at one time.

The height of the lead alloy feet of the negative plate is large, the negative plate can be gradually pressed and deformed under the influence of the increase of the negative plate, but the increase of the negative plate is small, so that the normal requirement of the negative plate can be met although the deformation allowed by the design of the lead alloy feet is small.

As shown in fig. 1 to 4, the positive plate 1 includes a positive plate grid 11, the positive plate grid 11 is formed by connecting a plurality of lead ribs 111 in parallel, each lead rib 111 is axially sleeved with a discharge pipe 13, a tube cavity of the discharge pipe 13 is filled with a paste lead dioxide reactant, a top opening of the discharge pipe 13 is axially sealed through an upper sheath 12, and a bottom opening of the discharge pipe 13 is axially sealed through a plastic sealing bottom 14; the hollow plastic sheets 15 are integrally butted to the lower parts of the plastic back covers 14.

By adopting the technical scheme, the condition that the lead powder on the positive plate in the prior art falls off can be effectively avoided. The lower parts of the plastic back covers 14 are integrally butted with hollowed plastic sheets 15, so that the later-stage lead-acid battery pole group assembly is facilitated.

As shown in fig. 3, the hollowed plastic sheet 15 is a polypropylene elastomer grid sheet, and the outer contour thereof is an inverted isosceles trapezoid structure.

Through adopting above-mentioned technical scheme, fretwork plastic sheet 15 can satisfy the positive plate well and increase the back compression demand.

As shown in fig. 5, the lead alloy anchor 211 and the grid-shaped grid body 21 of the negative plate 2 are integrally cast and molded of lead alloy.

By adopting the technical scheme, the lead alloy is softer, and the lead alloy feet can be pressed and deformed when the negative plate is increased; and the lead-acid battery pole group is convenient to assemble.

As shown in fig. 5, the longitudinal section of the lead alloy anchor 211 is an inverted isosceles trapezoid structure.

By adopting the technical scheme, the requirement on the compression amount of the increased negative plate can be well met.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. A kind of can lengthen tubular lead acid battery pole group, this pole group is by more than one positive plate (1) and more than one negative plate (2) alternate interval stack to form; the method is characterized in that:

the bottom of the positive plate (1) is integrally butted with a compressible hollowed plastic sheet (15);

the bottom of the negative plate (2) is symmetrically provided with two lead alloy feet (211) along the central axis.

2. The pole group of an extendable tubular lead acid battery of claim 1, wherein: the positive plate (1) comprises a positive plate grid (11), the positive plate grid (11) is formed by connecting a plurality of lead ribs (111) in parallel, each lead rib (111) is axially sleeved with a discharge pipe (13), a pipe cavity of the discharge pipe (13) is filled with a paste lead dioxide reactant, a top opening of the discharge pipe (13) is axially sealed through an upper sheath (12), and a bottom opening of the discharge pipe (13) is axially sealed through a plastic sealing bottom (14); the lower parts of the plastic back covers (14) are integrally butted with the hollowed plastic sheets (15).

3. The electrode group of an extendable tubular lead-acid battery according to claim 2, wherein: the hollowed plastic sheet (15) is a polypropylene elastomer grid sheet, and the outer contour of the hollowed plastic sheet is in an inverted isosceles trapezoid structure.

4. The pole group of an extendable tubular lead acid battery of claim 1, wherein: the lead alloy ground feet (211) and the grid-shaped grid body (21) of the negative plate (2) are integrally cast and molded by lead alloy.

5. The pole group of an extendable tubular lead acid battery of claim 4, wherein: the longitudinal section of the lead alloy ground pin (211) is of an inverted isosceles trapezoid structure.

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