JP5003301B2 - Lead acid battery - Google Patents

Description

  The present invention relates to a lead storage battery in which an electrode plate group is accommodated together with an electrolytic solution in a cell chamber formed in a battery case.

In a lead-acid battery, for example, as shown in Patent Document 1, a positive electrode plate and a negative electrode plate are laminated via a separator, and the positive electrode plate ears and the negative electrode plate ears are respectively connected to the positive electrode strap and the negative electrode plate. After the electrode plate group having the configuration connected by the negative electrode strap is accommodated in each of the plurality of cell chambers formed in the battery case body, the electrode plate group is provided at the end of the positive electrode strap of the electrode plate group accommodated in each cell chamber. The pole columns provided at the end portions of the pole columns and the negative electrode straps are respectively connected to the end portions of the negative electrode straps of the electrode plate groups in the adjacent cell chambers through the welded portions (inter-cell connection portions) that penetrate the partition walls between the cell chambers. The pole pole provided and the pole pole provided at the end of the positive strap are connected. After accommodating the electrode plate group in each cell chamber in the battery case body in this way, a lid is arranged so as to close the opening formed at the upper end of the battery case body, and the battery case body and the lid are joined. The battery case is constituted by the battery case body and the lid. Thereafter, an electrolytic solution is injected into each cell chamber from a liquid injection port provided on the lid of the battery case to complete the assembly of the battery.
JP 2002-170593 A

  When the lead storage battery having the above-described configuration is mounted on a vehicle such as an automobile, a construction machine, or an agricultural machine, the electrode plate constituting the electrode plate group when the electrode plate group vibrates due to the vibration of the vehicle. Relative displacement occurs between the electrodes, shearing force is applied to the straps, and relative displacement occurs between the electrode plate group and the wall of the cell chamber, connecting the pole columns and cells. Since a force is applied to the welded portion, the strap, the pole column, or the inter-cell connecting portion may be cracked, or these portions may be broken.

  An object of the present invention is to prevent cracks from being generated in a welded portion connecting polar poles, straps, or cells when vibration is applied, or preventing these portions from being broken. It is to provide a lead storage battery.

  The present invention relates to a lead-acid battery that is housed in a state where the electrode plate group is pressurized in each cell chamber of the battery case. In the present invention, the electrode plate group is laminated at the center of the upper surface of the electrode plate group. An electrode plate group fixing member having a frame portion extending in the direction is disposed. And resin is inject | poured inside the frame part of an electrode plate group fixing member, and this resin is adhere | attached on the part located inside the said frame part of the upper surface of an electrode plate group fixing member and an electrode plate group, and an electrode. A plate group fixing member is bonded to the inner surface of the cell chamber.

  As described above, the electrode plate group fixing member having a frame portion is arranged at the center of the upper surface of the electrode plate group, and the resin injected into the electrode plate group fixing member is injected into the electrode plate group fixing member and the electrode plate group. When the electrode plate fixing member is bonded to the inner surface of the cell chamber, the vicinity of the central portion of the upper portion of the electrode plate group is in a state of being solidified with resin using the electrode plate fixing member as an aggregate. When vibration is applied to the lead-acid battery, it is possible to prevent relative changes between the plates constituting the plate group, and a large force in the shearing direction is applied to the strap disposed on the top of the plate group. Can be prevented. As described above, when the electrode plate group fixing member is bonded to the inner surface of the cell chamber, when vibration is applied to the lead storage battery, the electrode plate group fixing member is relatively disposed between the upper portion of the electrode group and the wall surface of the cell chamber. Since it can prevent displacement, it prevents excessive force from being applied to the pole column and excessive force from being applied to the weld that penetrates the partition between the cell chambers and connects the cells. be able to.

  Therefore, when configured as described above, when vibration is applied, it is possible to prevent the welds connecting the pole poles, the straps, or the cells from cracking or preventing these parts from being broken, The reliability of the battery can be increased. Moreover, the lifetime of the lead acid battery used in the environment where a big vibration is added can be lengthened.

  In a preferred aspect of the present invention, the electrode plate group fixing member has a frame portion extending in the stacking direction of the electrode plate group, and the inner side of the frame portion at both ends of the frame portion in the direction along the stacking direction of the electrode plate group. A groove is provided to communicate between the outer space and the outer space. Then, resin is injected into the inside of the frame portion of the electrode plate group fixing member and into the groove portions respectively provided at both ends of the frame portion, and the resin injected into the inside of the frame portion of the electrode plate group fixing member is the electrode plate. While being bonded to the upper surfaces of the group fixing member and the electrode plate group, a part of the resin injected into the groove portion of the electrode plate group fixing member is bonded to the inner surface of the cell chamber.

  As described above, when the groove portion that communicates between the inner space and the outer space of the frame portion is provided at both ends of the frame portion of the electrode plate group fixing member, the groove portion of the flange portion of the electrode plate group fixing member Since the resin injected into the electrode flows into the gap between the electrode group fixing member and the inner surface of the cell chamber and is adhered to the inner surface of the cell chamber, the electrode plate group fixing member is attached to the inner surface of the cell chamber via the resin. Can be glued.

  In another preferable aspect of the present invention, the electrode plate group fixing member includes at least one pair extending and projecting from both ends of the frame portion extending in the stacking direction of the electrode plate group and the frame portion in the direction along the stacking direction of the electrode plate group. And the inner space of the frame portion and the outer space are communicated by a groove provided in each flange portion, and each flange portion is an inner surface of the electrode plate group and the cell chamber. It is arranged in a state of being engaged between and. Then, resin is injected into the inside of the frame portion of the electrode plate group fixing member and into the groove formed by the flange portion of the electrode plate group fixing member, and the resin injected into the inside of the frame portion of the electrode plate group fixing member is While being bonded to the upper surface of the electrode plate group fixing member and the electrode plate group, the resin injected into the groove portion of the collar portion of the electrode plate group fixing member is bonded to the inner surface of the cell chamber.

  The electrode plate group fixing member is preferably formed of an insulating material having acid resistance in order to come into contact with an electrolytic solution made of dilute sulfuric acid.

  According to the present invention, the electrode plate group fixing member having a frame portion is arranged at the center of the upper surface of the electrode plate group, and the resin injected into the electrode plate group fixing member is injected into the electrode plate group fixing member and the electrode plate. Since the electrode plate fixing member is bonded to the inner surface of the cell chamber while being adhered to the upper surface of the group, the vicinity of the central portion of the upper portion of the electrode plate group is solidified with resin using the electrode plate fixing member as an aggregate As a result, when vibration is applied to the lead-acid battery, it is possible to prevent relative changes between the electrode plates constituting the electrode plate group, and the strap arranged on the upper part of the electrode plate group has a shearing direction. A large force can be prevented from being applied. Further, when the electrode plate group fixing member is bonded to the inner surface of the cell chamber as in the present invention, when the lead storage battery is subjected to vibration, the electrode plate group fixing member is relatively disposed between the upper portion of the electrode plate group and the wall surface of the cell chamber. To prevent excessive displacement from occurring, so that excessive force is applied to the pole columns, or excessive force is applied to the welds that connect the cells through the partition walls between the cell chambers. Can be prevented.

  Therefore, according to the present invention, when the vibration is applied, it is possible to prevent the welded portion connecting the pole poles, the straps, or the cells from being cracked or to be broken. The reliability of the storage battery can be increased. Moreover, the lifetime of the lead acid battery used in the environment where a big vibration is added can be lengthened.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 show a preferred embodiment of the present invention. FIG. 1 is a cross-sectional view schematically showing the structure of a lead-acid battery according to the present embodiment taken along a vertical plane when viewed from the side. 2 is a sectional end view taken along the line II-II of FIG. 1 with the battery case lid removed, and FIGS. 3A and 3B are a part of the electrode plate group fixing member used in this embodiment. FIG. 4 is a perspective view schematically showing a state in which the electrode plate group fixing member is arranged on the electrode plate group.

  1 and 2, reference numeral 1 denotes a battery case comprising a battery case body 2 and a lid 3 that closes an opening at the upper end of the battery case body. Inside the battery case body 2, a plurality of cell chambers 5 are separated by partition walls 4. It is divided into. A partition wall 6 corresponding to each partition wall 4 is provided inside the lid 3, and the partition wall 6 partitions a space inside the lid into small spaces that constitute an upper space of each cell chamber 5.

  An electrode plate group 10 is accommodated in each cell chamber 5 in the battery case. As shown in FIG. 2, the electrode plate group 10 includes a plurality of positive plates 11 and negative plates 12 that are stacked via a separator 13, so that the ear portions and the negative electrodes of the positive plate 11 are stacked. The ears of the plate 12 are connected to each other by a positive strap 14 and a negative strap 15, and pole columns 16 and 17 are formed at the respective ends of the positive strap 14 and the negative strap 15.

  Each of the electrode plate groups 10 is inserted into a predetermined cell chamber in a state where the stacking direction of the electrode plates is directed in the direction in which the cell chambers 5, 5,. And the pole column 16 provided in the edge part of the positive electrode strap of the electrode group 10 accommodated in each cell chamber 5 and the pole column 17 provided in the edge part of the negative electrode strap are the partition 4 between cell chambers, respectively. Through the welded portion (inter-cell connection portion) that penetrates the electrode plate, it is connected to the pole column 17 provided at the end portion of the negative electrode strap of the electrode plate group in the adjacent cell chamber and the pole column 16 provided at the end portion of the positive electrode strap. Then, the electrode plate groups inserted in the series of cell chambers are connected in series. In FIG. 1 and FIG. 2, the inter-cell connection part is not shown.

  In the present invention, when the electrode plate group 10 is inserted into the cell chamber 5, the electrode plate group fixing member 20 is disposed on the center of the upper surface of the electrode plate group 10 as shown in FIG. 4. . As shown in FIG. 3, the electrode plate group fixing member 20 protrudes from both ends of the frame portion 21 extending in the stacking direction of the electrode plate group 10 and the frame portion 21 in the direction along the stacking direction of the electrode plate group 10. And has a structure in which the inner space and the outer space of the frame portion 21 are communicated with each other by a groove 23 formed inside each flange portion 22. Yes. When the electrode plate group 10 is inserted into the cell chamber 5, each flange portion 22 is opposed to the upper portions at both ends of the electrode plate group 10 in the stacking direction and the inner surfaces facing the cell chamber (in the electrode plate group stacking direction). Between the inside and the inside.

  After the electrode plate group 10 is inserted into the cell chamber 5, the resin 25 (see FIG. 2) is injected into the groove portion 23 formed inside the frame portion 21 and the inside of the flange portion 22 of the electrode plate group fixing member 20. The resin 25 injected into the inside of the frame portion of the electrode plate group fixing member 20 is adhered to the upper surfaces of the electrode plate group fixing member 20 and the electrode plate group 10, and the flange portion 22 of the electrode plate group fixing member 20 The resin 25 injected into the groove 23 flows out into the inner surface of the cell chamber through the groove 23 and is bonded to the inner surface of the cell chamber.

  As the resin 25 to be injected into the inside of the frame portion 21 of the electrode plate group fixing member 20 and into the groove portion 23 of the flange portion 22, a thermosetting epoxy resin, an ultraviolet curable epoxy resin, an ultraviolet curable acrylic resin, or the like is used. preferable. As the resin to be injected into the frame 21 and the groove 23, a resin that is uncured and has a certain degree of viscosity (low fluidity) is used. The resin injected into the inside of the frame portion 21 is between the electrode plates so that a substantial portion of the resin injected into the groove portion 23 remains in the groove portion 23 without greatly spreading outside the frame portion 21 on the upper surface. It is preferable not to penetrate deeply.

  Note that the resin 25 injected into the inside of the frame 21 spreads to the outside of the frame portion 21 to some extent even if a resin having low fluidity is used. Even if it spreads outside the part 21, it will not cause any trouble.

  As described above, the electrode plate group 10 is inserted into the cell chamber 5, the resin is injected into the inside of the frame portion of the electrode plate group fixing member 20, and the vicinity of the upper central portion of the electrode plate group 10 is covered with the resin 25. After solidifying and adhering the upper part of both ends of the electrode plate group fixing member 20 in the stacking direction to the inner surface of the cell chamber 5, the lid 3 is disposed so as to close the opening formed at the upper end of the battery case body 2, The junction between the battery case body 2 and the lid 3 is sealed, and the battery case 1 is constituted by the battery case body 2 and the lid 3. Thereafter, an electrolytic solution is injected into each cell chamber 5 from a liquid injection port (not shown) provided on the lid of the battery case to complete the assembly of the battery.

  As described above, the electrode plate group fixing member 20 having the frame portion 21 is arranged at the center of the upper surface of the electrode plate group 10, and the resin 25 injected into the electrode plate group fixing member is injected into the electrode plate group fixing member. 20 and the upper surface of the electrode plate group, and when the electrode plate group fixing member 20 is bonded to the inner surface of the cell chamber 5, the vicinity of the upper central portion of the electrode plate group 10 is located near the electrode plate group fixing member 20. Can be fixed to the wall of the cell chamber via the resin 25 and the electrode plate group fixing member 20, so that vibrations are generated in the lead storage battery. When applied, it prevents a relative change from occurring between the electrode plates constituting the electrode plate group and prevents a large force in the shearing direction from being applied to the straps 14 and 15 arranged on the upper part of the electrode plate group. Can be prevented. Further, the electrode plate group fixing member 20 is bonded to the inner surface of the cell chamber, so that when the lead storage battery is subjected to vibration, a relative displacement occurs between the upper portion of the electrode plate group 10 and the wall surface of the cell chamber. Therefore, it is possible to prevent an excessive force from being applied to the pole columns 16 and 17 and an excessive force from being applied to the welded portion that penetrates the partition wall 4 between the cell chambers and connects the cells. be able to.

  In the above embodiment, the flange portions 22 and 22 are formed at both ends of the frame portion 21 of the electrode plate group fixing member 20, and these flange portions are inserted between the electrode plate group and the inner surface of the cell chamber. However, without providing the flange portions 22, 22, a groove portion (corresponding to the groove portion 23 provided in the above embodiment) that communicates between the inner space and the outer space of the frame portion at both ends of the frame portion 21. Only a groove portion) may be formed, and a part of the resin injected inside the frame portion 21 may flow out to the inner surface side of the cell chamber through the groove portion and be adhered to the inner surface of the cell chamber.

  Further, without providing groove portions at both ends of the frame portion 21 of the electrode plate group fixing member 20, both ends of the frame portion 21 of the electrode plate group fixing member are made of resin provided between the frame portion 21 and the inner surface of the cell chamber 5. You may make it adhere | attach on the inner surface of a cell chamber. That is, the resin 25 is injected into the inside of the frame portion 21, and the resin is applied between both ends of the frame portion 21 and the inner surface facing the cell chamber 5 to bond the frame portion 21 to the inner surface facing the cell chamber. You may do it.

  FIG. 5 shows a modification of the electrode plate group fixing member 20 used in the embodiment of the present invention. In this example, the separator 13 is disposed on the lower surface of the frame portion 21 (the surface facing the upper surface of the electrode plate group). Projections 21 a, 21 b, 21 a, 21 b,... Are formed which are inserted into the gaps and are respectively brought into contact with the upper end of the positive electrode plate 11 and the upper end of the negative electrode plate 12. When the electrode plate group fixing member 20 is configured in this way, the protrusions 21a and 21b partition the gap between the separators 13, so that the resin injected into the inside of the frame portion of the electrode plate group fixing member 20 flows relatively high. Even if it has property, it can prevent that resin spreads widely outside the frame part 21.

  When providing a groove part or a collar part in the both ends of the frame part 21 of the electrode group fixing member 20, the number of the groove part or collar part 22 provided in each edge part of the frame part 21 may be two or more.

1 is a cross-sectional view schematically showing a configuration of a lead storage battery according to an embodiment taken along a vertical plane when viewed from the side. FIG. 2 is a cross-sectional end view taken along the line II-II in FIG. 1 with the battery case lid removed. (A) And (B) is the top view which notched and showed a part of electrode plate group fixing member used by this embodiment, respectively, and the front view which notched and showed a part. It is the perspective view which showed roughly the state which has arrange | positioned the electrode group fixing member on the electrode group used with the lead acid battery concerning this embodiment. It is the front view which notched and showed the modification of the electrode group fixing member used by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery case 2 Battery case main body 3 Lid of battery case 4 Partition between cell chambers 5 Cell chamber 10 Electrode plate group 20 Electrode plate group fixing member 21 Frame part 22 Gutter part 23 Groove part 25 Resin

Claims (4)

In a lead storage battery that is housed in a state where the electrode plate group is pressurized in each cell chamber of the battery case,
An electrode plate group fixing member having a frame portion extending in the stacking direction of the electrode plate group is disposed at the center of the upper surface of the electrode plate group,
Resin is injected into the inside of the frame portion of the electrode plate group fixing member, and the resin is bonded to the portion located on the inside of the frame portion of the upper surface of the electrode plate group fixing member and the electrode plate group, The electrode plate group fixing member is bonded to the inner surface of the cell chamber;
Lead acid battery characterized by. In a lead storage battery that is housed in a state where the electrode plate group is pressurized in each cell chamber of the battery case,
An electrode plate group fixing member is disposed at the center of the upper surface of the electrode plate group,
The electrode plate group fixing member has a frame portion extending in the stacking direction of the electrode plate group, and a space inside the frame portion at both ends of the frame portion in a direction along the stacking direction of the electrode plate group. A groove that communicates with the outer space is provided,
Resin is injected into the inside of the frame portion of the electrode plate group fixing member and into the groove portions respectively provided at both ends of the frame portion,
The resin injected into the inside of the frame portion of the electrode plate group fixing member is bonded to the upper surfaces of the electrode plate group fixing member and the electrode plate group and injected into the groove portion of the electrode plate group fixing member. The resin is adhered to the inner surface of the cell chamber;
Lead acid battery characterized by. In a lead storage battery that is housed in a state where the electrode plate group is pressurized in each cell chamber of the battery case,
An electrode plate group fixing member is disposed at the center of the upper surface of the electrode plate group,
The electrode plate group fixing member includes a frame portion that extends in the stacking direction of the electrode plate group, and at least one pair of flange portions that protrude from both ends of the frame portion in a direction along the stacking direction of the electrode plate group. And having a structure in which the inner space and the outer space of the frame portion are communicated by a groove provided in each flange portion, and each flange portion is formed between the electrode plate group and the inner surface of the cell chamber. In between,
Resin is injected into the inside of the frame portion of the electrode plate group fixing member and into the groove formed by the flange portion of the electrode plate group fixing member. Is bonded to the upper surface of the electrode plate group fixing member and the electrode plate group, and the resin injected into the groove of the flange of the electrode plate group fixing member is bonded to the inner surface of the cell chamber. ,
Lead acid battery characterized by.   The lead storage battery according to claim 1, wherein the electrode plate group fixing member is made of an insulating material having acid resistance.

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