JP2012146432A - Vent type storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vent type storage battery in which floating of a spacer can be prevented by a simple structure.SOLUTION: The vent type storage battery 1 is provided, in a battery container 20 having an upper opening being closed by a battery container lid 22, with an electrode plate group 11 where positive electrode plates and negative electrode plates are laminated alternately with a separator interposed therebetween, and spacers 17 arranged on both outer side surfaces of the electrode plate group 11 in the lamination direction. A support member 21 formed separately from the battery container lid 22 is provided between the connection conductors 13, 14 of the positive and negative electrodes in the electrode plate group 11. The support member 21 is held in contact with the upper surfaces of the spacers 17a, 17b, the lower surface of the battery container lid 22, and at least one connection conductor, and arranged from the front surface over the back surface of the battery container 20 facing the lamination direction of the electrode plate group 11.

Description

  The present invention relates to a bent storage battery in which an electrode plate group and a spacer arranged on the outer side in the stacking direction of the electrode plate group are accommodated in a battery case.

  Conventionally, in order to make parts common, a battery of the same size is used, and bent type storage batteries having different capacities have been formed. In this case, in the small-capacity storage battery, the number of components of the electrode plate is reduced, so that a space is generated between the electrode plate group and the battery case. Therefore, spacers are inserted in the gap between the electrode plate group on both outer side surfaces in the stacking direction of the electrode plate group and the battery case. This type of spacer tends to float in the electrolyte. In order to prevent this type of spacer from being lifted, the present applicant firstly, above the electrode plate group in the battery case, from the flat plate part in which the pole column through hole is formed and the concave part reaching the upper end of the electrode plate group in the center. Therefore, there has been proposed a storage battery including a support member in which a protrusion is formed on a surface parallel to the electrode plate group stacking direction of the outer surface of the recess (see, for example, Patent Document 1). The support member is disposed above the electrode plate group with a pole column formed at the upper part of the electrode plate group passing through the electrode pole through hole. The bottom surface of the recess of the support member is disposed in contact with the upper end of the electrode plate group. At this time, the protrusion formed on the side surface of the concave portion of the support member is in contact with the upper end of the spacer.

Utility Model Registration No. 3101971

However, the support member can be easily integrally molded using a molding die that is easy to mold. However, since this support member has a complicated shape and a large size, the manufacturing cost has increased due to the complexity of the mold for component molding and the increase in raw material costs.
An object of the present invention is to provide a bent type storage battery that solves the above-described problems of the prior art and can prevent the spacer from being lifted with a simple structure.

  In order to achieve the above object, the present invention comprises an electrode plate group in which a positive electrode plate and a negative electrode plate are alternately laminated via a separator in a battery case whose upper opening is closed with a battery case lid, A bent storage battery comprising spacers arranged on both outer sides in the stacking direction of the electrode plate group, and a support formed separately from the battery case lid between the positive electrode and negative electrode connection conductors of the electrode plate group. The support member is held in contact with at least the connection conductor and the upper surface of the spacer, the lower surface of the battery case lid, and from the front surface of the battery case facing the stacking direction of the electrode plate group It is a vent type storage battery characterized by being arranged over the back.

  According to this configuration, the support member can be formed without using a complicated molding die, and the manufacturing cost can be reduced. In addition, since the support member is formed so as to contact the upper surface of the spacer and the lower surface of the battery case lid, the support member is simply disposed between the positive electrode and negative electrode connection conductors of the electrode plate group. Since lifting can be prevented, assembly workability is good.

In this configuration, the battery case and the support member may be formed of a transparent member.
According to this configuration, since the battery case is transparent and the support member disposed in the battery case is also transparent, the level of the electrolyte in the battery case can be easily visually observed from the outside of the battery case. It can be confirmed, and it can be easily determined whether or not the electrolyte must be injected into the battery case.

The support member may have a top opening and a bottom surface, and may be formed in a shape in which the opposite sides of a pair of side surfaces exist.
According to this configuration, since the side surface of the support member comes into contact with the current collecting lead extending from each electrode plate of the electrode plate group and the connection conductor that converges the current collecting lead, the support member can be surely held at a predetermined position. It is possible to reliably prevent the spacer from being lifted by the member.

The support member may have a structure in which holes are formed on opposite sides of a pair of side surfaces.
According to this configuration, since the electrolytic solution easily goes back and forth between the connection conductors in the battery case, the liquid injection property can be improved.

In addition, when the support member is disposed in a space formed between the electrode plate group and the spacer, the connection conductor, and the current collecting lead, the vertical height of the support member is increased from the upper surface of the electrode plate group and the spacer. You may form higher than the height to the lower surface of a tank cover.
According to this configuration, the difference in the height of the support member serves as a pushing allowance, and the side surface of the support member is arranged along the connection conductor. The stability of the member can be improved.

  According to the present invention, a support member formed separately from the battery case lid is provided between the positive and negative connection conductors of the electrode plate group, and the support member extends from the upper surface of the spacer to the lower surface of the battery case lid. Since it has a height and a height from the upper surface of the spacer arranged from the front surface to the back surface of the battery case facing the stacking direction of the electrode plate group to the lower surface of the battery case cover, the spacer has a simple structure. There is an effect that it is possible to prevent the floating of the.

It is a perspective view which shows the structure of the vent type storage battery of this embodiment. It is a front view of a vent type storage battery. It is side surface sectional drawing of a vent type storage battery. It is a perspective view of a support member. It is a figure which shows another form of a support member. It is a figure which shows another form of a support member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a bent storage battery 1 according to an embodiment to which the present invention is applied, and showing a state in which an electrode plate group 11 is pulled out from a battery case 20. FIG. 2 is a front view of the bent storage battery, and FIG. 3 is a side sectional view of the bent storage battery 1.
As shown in FIG. 1 and FIG. 3, the bent storage battery 1 is composed of a plate group 11 and spacers 17 b arranged on both outer surfaces of the plate group 11, and a presser 18 is used to hold the electrode plate group 11. It is formed by being sandwiched and integrated from the lateral direction with respect to the stacking direction and inserted into the battery case 20 through the upper opening of the battery case 20. Here, in the bent storage battery 1, the presser 18 may produce batteries of several kinds of capacity in the same battery case. At this time, spacers 17 b are arranged on both outer side surfaces of the electrode plate group 11, and this is used. It is held by the presser 18. And the spacer 17a for adjusting the space between the battery cases 20 is inserted in the outer side. Here, as an example, a case where two electrode plate groups 11 and 11 are provided is shown. In the electrode plate group 11, the following constituent members are not shown, but the positive electrode plate is a negative electrode plate with a separator interposed between a paste or sintered positive electrode plate and a paste or sintered negative electrode plate. Are stacked alternately so as to sandwich them. The separator is formed by sandwiching a microporous film such as a polyolefin sheet between two non-woven fabrics, and is arranged so that each electrode plate and the non-woven fabric are in contact with each other.

  As shown in FIG. 2, current collecting leads 12 protrude from the upper part of each electrode plate. The current collecting leads 12a protruding from each negative electrode plate are collected on the right side in FIG. 2, and the current collecting leads 12b protruding from each positive electrode plate are collected on the left side in FIG. As shown in FIG. 2, the current collecting leads 12 a and 12 b are arranged at a predetermined distance W <b> 1 at a protruding portion from each electrode plate. The current collecting leads 12a and 12b are converged so as to be sandwiched between metal connection conductors 13 and 14, respectively. The connection conductors 13 and 14 extend to the lower surface of the battery case lid 22, and the connection conductors 13 and 14 are arranged in a state of being separated from each other by a predetermined interval W2. A negative pole 15 and a positive pole 16 are arranged and welded to the upper portions of the connection conductors 13 and 14 respectively.

  The number of electrode plates constituting the electrode plate group 11 varies depending on the capacity of the bent storage battery 1 to be manufactured. Since the vent type storage battery 1 having different capacities is manufactured using the battery case 20 having the same size, when the vent type storage battery 1 having a small capacity is manufactured, the number of electrode plates constituting the electrode group 11 is reduced. The thickness of the electrode plate group 11 is reduced. Therefore, as shown in FIG. 3, spacers are provided on both outer side surfaces of the electrode plate group 11 in the stacking direction so as to fill a gap between the outer sides of the electrode plate group 11 in the stacking direction and the battery case 20. 17b, and a spacer 17a is disposed between the battery case 20 and the spacer 17b on the outer side of the electrode plate group. The spacers 17a and 17b are formed from a resin such as polypropylene, and the thickness and number of the spacers 17a and 17b can be changed depending on the capacity of the bent storage battery 1 to be manufactured. The height and width of the spacer 17 are substantially the same as the dimensions of each electrode plate. In the example shown in FIG. 3, the bent storage battery 1 has a total of six spacers 17 b arranged on both outer side surfaces of each electrode plate group 11 and a spacer 17 a on the battery case side of the spacer 17 b. However, the spacers 17b2 in the middle between the electrode plate groups 11 and 11 and the spacers 17a and 17b2 on the battery case 20 side may each be constituted by one.

  As shown in FIGS. 2 and 3, a support member 21 is inserted between the current collecting leads 12a and 12b. The support member 21 is formed in a substantially V-shaped cross section, and fits and fits in the depth dimension L1 of the battery case 20 extending from the front surface to the back surface of the battery case 20 in the stacking direction of the electrode plate group 11. Placed in. The lower end portion of the support member 21 is disposed so as to fit and fit in the interval W1 between the current collecting leads 12a and 12b, and is provided in contact with the upper end surfaces of the spacers 17a and 17b. Further, the support member 21 has the upper end surface in contact with the lower surface of the battery case cover 22, and the battery case cover 22, the electrode plate group 11 and the spacers 17a and 17b, the connection conductors 13 and 14, and the current collecting lead 12a. , 12b is accommodated in a space R formed between them.

As shown in FIG. 3, the battery case lid 22 is provided with pole column through holes 23 and 24 through which the negative pole 15 and the positive pole 16 penetrate. The battery case lid 22 is fused to the battery case 20 by ultrasonic waves or an adhesive with the negative pole 15 and the positive pole 16 penetrating through the pole post through holes 23 and 24. As shown in FIG. 2, the distance H1 between the lower surface of the battery case lid 22 and the upper surface of the electrode plate group 11 is formed at substantially the same height even in storage batteries having different capacities.
As shown in FIG. 1, a liquid injection port 25 is formed at a substantially central portion of the battery case lid 22. After fusing the battery case lid 22 to the battery case 20 with ultrasonic waves or an adhesive, the electrolyte solution is supplied from the electrolyte injection port 25 to the height of the highest liquid surface line (not shown) provided on the side surface of the battery case 20. Inject liquid. The electrolytic solution injection port 25 is sealed with a removable injection plug 26 via an O-ring, a washer or the like. Further, when the injection plug 26 is removed, a hydrometer (not shown) can be inserted into the electrolyte injection port 25.

Although not shown, the lowest liquid level line is provided on the side surface of the battery case 20 below the highest liquid level line. The lowest liquid surface line is provided at substantially the same height as the upper surface of the electrode plate group 11 housed in the battery case 20. The battery case 20 is formed of a transparent resin material, and is configured so that the height of the electrolyte surface can be visually observed from the outside of the battery case 20. Moreover, since the battery case 20 is formed from the transparent resin material, it can be easily confirmed visually from the outside of the battery case 20 whether the support member 21 is inserted.
Further, screw grooves are carved in the upper portions of the negative pole 15 and the positive pole 16. The negative pole 15 and the positive pole 16 are welded to the battery case 20 with ultrasonic waves or an adhesive, and then screwed together with nuts 27, 28, etc. To be concluded.

  The support member 21 is made of a transparent synthetic resin having alkali resistance and acid resistance such as vinyl chloride and nylon. The support member 21 having a substantially V-shaped cross section may be formed by bending a flat plate member made of vinyl chloride into a substantially V-shaped cross section, for example. The support member 21 is electrically connected with the upper end portions 21a and 21a of the support member 21 shown in FIG. 4 in contact with the lower surface of the battery case lid 22 and the lower end portion 21b of the support member 21 in contact with the upper surfaces of the spacers 17a and 17b. Housed in the tank 20. The upper portions of the side surfaces 21c and 21d of the support member 21 are arranged in contact with the upper portions of the connection conductors 13 and 14, respectively. Thereby, the support member 21 is reliably held in the space R formed between the battery case lid 22, the electrode plate group 11 and the spacers 17a and 17b, the connection conductors 13 and 14, and the current collecting leads 12a and 12b. . Moreover, since the support member 21 is transparent, it is easy to confirm the height of the electrolyte surface in the battery case from the outside of the transparent battery case 20.

The dimension L2 in the depth direction of the support member 21 is formed to be approximately the same as the internal dimension L1 (see FIG. 3) of the battery case 20 extending from the front surface to the back surface of the battery case 20. Therefore, on the upper surfaces of the spacers 17a and 17b arranged on both outer side surfaces of the electrode plate group 11 in the stacking direction so as to fill a gap between both outer sides of the electrode plate group 11 in the stacking direction and the battery case 20. The lower end portion 21b of the support member 21 is provided in contact therewith.
The width W1 of the lower end portion 21b of the support member 21 is formed to be approximately the same as the interval W1 between the current collecting leads 12a and 12b, and the lower end portion 21b of the support member 21 is fitted into the interval between the current collecting leads 12a and 12b. Held. In addition, the width W3 between the upper end portions 21a and 21a of the support member 21 is substantially the same as or slightly wider than the interval W2 between the connection conductors 13 and 14.
The height H2 of the support member 21 is a height H1 (see FIG. 2) from the upper surface of the electrode plate group 11 to the lower surface of the battery case lid 22 in a state where the electrode plate group 11 is accommodated inside the battery case 20. It is substantially the same or slightly higher.

  According to these configurations, the support member 21 is pressed against the upper surface of the electrode plate group 11 and the spacers 17 a and 17 b by the battery case lid 22 while being disposed in the space R, and between the connection conductors 13 and 14. Sandwiched between. Therefore, it can prevent moving within the battery case 20. Further, the support member 21 made of vinyl chloride, nylon or the like has a slight elasticity, and its height H2 is a height from the upper surface of the electrode plate group 11 and the spacers 17a and 17b to the lower surface of the battery case lid 22. If it is formed slightly higher than the height H1, the difference in height becomes a push allowance. Therefore, the support member 21 is pushed in by the battery case lid 22, and the side surfaces 21 c and 21 d of the support member 21 are arranged along the connection conductors 13 and 14. Therefore, the movement of the support member 21 in the lateral direction is suppressed, and the installation stability of the support member 21 is improved.

  As shown in FIGS. 5A and 5B, the support member 21 may have a structure in which a hole 29 communicating with the connection conductors 13 and 14 is formed in the side surfaces 21c and 21d. One or more holes 29 may be provided. In FIG. 5A, a hole 29 is formed which extends from the bottom of the side surface to the bottom surface. In FIG. 5B, a hole 29 is formed at the center of the side surface, and a semicircular hole 29 is formed at the side edge of the side surface. According to this configuration, since the electrolytic solution easily goes back and forth between the connection conductors 13 and 14 in the battery case 20, the liquid injection property is improved.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to this. In the present embodiment, the support member 21 is formed in a substantially V-shaped cross section in consideration of ease of manufacture and the stability of the support member in the arranged state. Here, when the cross section is substantially V-shaped, it is sufficient that the upper opening portion and the bottom surface are formed and the opposite sides of the pair of side surfaces exist, and the cross section is substantially U-shaped or substantially U-shaped. There is no problem even if it exists. However, on the upper surfaces of the spacers 17a and 17b that are formed to have substantially the same height as the height from the upper surface of the electrode plate group 11 to the lower surface of the battery case lid 22, and are arranged on both outer side surfaces of the electrode plate group 11 in the stacking direction. If it can arrange | position in the battery case 20 so that it may contact | abut, it will not be limited to the said shape. For example, as shown in FIGS. 6A and 6B, it may be formed in a substantially cylindrical shape or flat plate shape having a hole 29 into which a hydrometer is inserted at the center. In FIG. 6A, a support member having a substantially V-shaped cross section is formed by adding an upper surface to form a substantially cylindrical shape, and a hole 29 is formed at the center of the upper surface, and the upper end portion is slightly upward. It is formed to be curved toward The height (push allowance) δ of the curved portion is pushed by the battery case lid 22 when the support member 21 is disposed in the space R. By pressing the pushing allowance δ, both side surfaces of the substantially cylindrical support member 21 are brought into close contact with the upper portions of the connection conductors 13 and 14, and the stability of the support member 21 is improved. In FIG. 6B, the support member is constituted by a single flat plate, and a hole 29 is formed in the center thereof. In addition, the support member has its upper end in contact with the lower surface of the battery case lid in the space R and its lower end in contact with the upper surface of the spacer. (For example, on the positive electrode side) and the lower end portion thereof are arranged diagonally so as to abut on the other current collecting lead (for example, the negative electrode side).

  As shown in FIG. 6C, the support member 21 includes three surfaces that contact the front and back surfaces of the battery case 20 and the upper surface of the electrode plate group 11, and the battery case starts from the upper surface of the electrode plate group 11. You may form in the substantially U shape formed in the height dimension substantially the same as the height to the lower surface of the lid | cover 22. FIG. A length L2 of the support member 21 shown in FIG. 6C is formed to be approximately the same length as the depth dimension L1 of the battery case 20. Therefore, the side surfaces 21e and 21f of the support member 21 are held in close contact with the inner surfaces of the front surface and the rear surface of the battery case 20. Thereby, the stability of installation of the support member 21 can be improved.

In addition, although the battery type is not limited in the embodiment of the present invention, it can be applied not only to a bent type alkaline storage battery but also to a bent type lead storage battery. Further, the present invention can also be applied to other stationary type vent type storage batteries that have substantially the same configuration.
Of course, other details and the like can be arbitrarily changed.

DESCRIPTION OF SYMBOLS 1 Bent storage battery 11 Electrode plate group 12a, 12b Current collecting lead 13, 14 Connection conductor 15 Negative electrode column 16 Positive electrode column 17a, 17b Spacer 20 Battery case 21 Support member 22 Battery case cover 25 Electrolyte injection port 26 Injection plug R space

Claims (5)

In the battery case whose upper opening is sealed with the battery case lid, the electrode plate group in which the positive electrode plate and the negative electrode plate are alternately stacked via the separator, and arranged on both outer surfaces in the stacking direction of the electrode plate group A bent storage battery comprising:
Between the positive electrode and negative electrode connecting conductors of the electrode plate group, formed separately from the battery case lid, and provided with a support member for preventing the spacer from floating, the support member includes an upper surface of the spacer, The battery case cover is held in contact with the lower surface of the battery case lid and at least one connection conductor, and is arranged from the front surface to the back surface of the battery case facing the stacking direction of the electrode plate group. Vent type storage battery.   The bent battery according to claim 1, wherein the battery case and the support member are formed of a transparent member.   The said support member has an upper opening part and a bottom face, and is formed in the shape where the opposite side of a pair of side surface exists, or the substantially cylindrical shape or flat plate shape provided with the opening in the center. Or the vent type storage battery of 2.   The vent type storage battery according to claim 3, wherein the support member has holes formed on opposite sides of a pair of side surfaces.   When the support member is disposed in a space formed between the electrode plate group and the spacer, the connection conductor, and the current collecting lead, the vertical height of the support member extends from the upper surface of the electrode plate group and the spacer to the battery case cover. The bent storage battery according to any one of claims 3 to 4, wherein the bent storage battery is formed to be higher than a height up to the lower surface.

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