JP5386773B2 - Sealed lead acid battery - Google Patents

Description

  The present invention relates to a sealed lead-acid battery, and more particularly to the structure of the lid.

For example, Patent Document 1 discloses a sealed lead-acid battery configured to discharge gas generated in a cell to the outside. In general, a sealed lead-acid battery is disposed at the left and right ends, a battery case body having a plurality of cells (baths), an electrode plate group housed in the cell, a lid body covering the battery case body from above. A pair of positive and negative electrode terminals protruding from the lid at a position corresponding to each cell, and an exhaust hole through which the gas such as hydrogen gas generated in the cell is discharged to the lid at a position corresponding to each cell Is formed. In addition, an exhaust chamber for collecting the gas discharged from the exhaust holes is formed in the lid at a position corresponding to the cell at the end, and the gas generated in each cell is directed to the exhaust chamber on the lid. A guide path is formed on the lid so that an exhaust port for exhausting gas from the side of the lid communicates with the exhaust chamber.
Japanese Utility Model Publication No. 57-107271

  Like the conventional sealed lead-acid battery, the electrode terminal is located at a position corresponding to the cell disposed at the end, and the exhaust chamber is provided at a position corresponding to the cell disposed at the end. The left and right widths of this cell must be larger than other cells. In other words, the left and right widths of the cells are not formed equal.

  Since each cell usually contains the same number of electrode plates, if the left and right widths of the cells are different, the cell plate is stored in a wide cell and the force to press the electrode plate stored in the narrow cell. Therefore, a difference occurs in the force with which the electrode plate is pressed. If it does so, an imbalance will occur in the voltage of a cell and the life of a lead storage battery will become short.

  Then, in view of the said subject, this invention makes it a subject to provide the sealed lead acid battery which can prevent the imbalance which arises in the voltage of a cell and can prevent the lifetime of a battery from shortening.

The sealed lead-acid battery according to the present invention includes a battery case having a plurality of cells arranged side by side to accommodate a group of electrode plates composed of a plurality of electrode plates, and a side wall provided above the battery case. And the electrode terminals provided on the lid at positions corresponding to the respective cells arranged on the left and right ends, and the lid has an inner cell at a position corresponding to each cell. An exhaust hole for discharging the gas generated in the cell from the cell is formed, the gas discharged from the exhaust hole is collected and an exhaust chamber provided with a filter is provided, and the gas generated in each cell is directed toward the exhaust chamber A sealed lead-acid battery, in which a guide path for guiding is formed, an exhaust port for exhausting gas from a side wall to the outside is formed, and an exhaust path for communicating the exhaust port and the exhaust chamber is provided. Set the chamber at a position corresponding to the cell located inward of the left and right cells of the edge cell. Is, extending in the lateral direction of the exhaust passage cells, wherein the exhaust port to the side wall near the exhaust chamber side is provided with a length of extension of the exhaust passage, the one cell It is characterized by being not less than the length in the left-right direction.

  In the above-described configuration, the exhaust chamber provided with the filter is disposed at a position corresponding to the cell located inward in the left-right direction of the end cell, thereby reducing the width of the lid corresponding to the end cell by that amount. Therefore, even if the electrode terminals are provided on the lid at positions corresponding to the left and right end cells, the left and right widths of the cells can be made uniform, and an imbalance caused in the cell voltage can be prevented. Thus, shortening of the battery life is suppressed.

  The sealed lead-acid battery of the present invention is characterized in that three or more cells are arranged in parallel, and the exhaust chamber is provided at a position corresponding to the cell arranged next to the end cell.

  In this configuration as well, the left and right widths of the cells are made uniform to prevent the imbalance that occurs in the cell voltage and the battery life is prevented from being shortened.

  In the sealed lead-acid battery of the present invention, a concave portion that is recessed toward the center side of the lid body in a state where the battery case is covered is provided on the side portion of the lid body, and communicates with the exhaust chamber and laterally from the concave portion. The exhaust pipe is provided with an exhaust pipe that protrudes toward the outside and does not protrude laterally beyond the outer edge of the lid, and an exhaust port is formed at the tip of the exhaust pipe.

  According to the above configuration, since the exhaust port does not protrude to the side of the outer edge of the lid, even if an exhaust pipe protruding from the side is provided, it can be prevented from becoming an obstacle, and the lid Does not impair the compactness of the body.

  According to the present invention, by arranging the exhaust chamber provided with the filter at a position corresponding to the cell located inward in the left-right direction of the end cell, the left-right width of the lid corresponding to the end cell is accordingly increased. Even if the electrode terminals are provided on the lid at positions corresponding to the left and right end cells, the left and right widths of the cells can be made uniform, and the imbalance that occurs in the cell voltage can be reduced. It is possible to prevent adverse effects such as shortening the battery life.

  Hereinafter, a sealed lead-acid battery (hereinafter simply referred to as “storage battery”) according to an embodiment of the present invention will be described with reference to FIGS. As shown in these drawings, the storage battery 1 includes a battery case 3 and a lid 5. The battery case body 3 is formed in a rectangular parallelepiped shape having cells 2 arranged side by side to accommodate the electrode plate group D composed of a plurality of electrode plates. The lid 5 includes an inner lid 6 and a hidden lid (upper lid) 7. As shown in the front view of FIG. 2, the inner lid 6 has a fitting portion 8 fitted to the upper end surface of the battery case 3 from above at the lower portion and is integrally formed on the upper portion of the fitting portion 8. A rectangular gas guide portion 10 and mounting portions 6A and 6B for positive and negative electrode plates of the electrode plate group D are provided at the left and right corners. The fitting portion 8 of the inner lid 6 overlaps the upper end portion of the battery case 3 from above on the lower four sides and covers the upper end portion on its side. The gas guide portion 10 of the inner lid 6 has a side wall 4 formed at a predetermined height.

  As shown in the overall plan view of FIG. 1 and the side view of FIG. 3, among the fitting portion 8 and the gas guide portion 10 of the inner lid 6, A stepped recess 11 that is recessed toward the center of the guide 10 is formed. An exhaust pipe 13 is formed so as to protrude from the side surface 12 of the recess 11 toward the side. By forming the recess 11 on the side of the gas guide 10 only, the lid 5 holds the state in which the battery case 3 is covered.

  The front end portion of the exhaust pipe 13 is formed in a length that does not protrude laterally from the outer edge side 14 of the fitting portion 8 in plan view. The distal end portion of the exhaust pipe 13 is formed in a tapered conical surface, and the distal end portion of the exhaust pipe 13 is formed with a cut 15 that is a cross when viewed from the side.

  As shown in the front longitudinal sectional view of FIG. 4, an insertion port having an exhaust hole 17 for discharging the gas 16 generated in the cell 2 from the cell 2 at a position corresponding to each cell 2 on the lower surface of the inner lid 6. 18 (also serving as a liquid spigot) are integrally formed side by side in the left-right direction so as to protrude downward. Further, an outer frame 20 is formed on the upper surface of the inner lid 6 along the plan view shape of the gas guide portion 10, and the inner region thereof is formed so as to be depressed downward.

  As shown in the longitudinal sectional view of the side surface of FIG. 5, the insertion port portion 18 is formed with a sharp tip at the bottom and is formed into a cylindrical shape as a whole, and the exhaust hole 17 is the insertion port portion. 18 includes a pair of holes 17a formed on the outer peripheral surface of the front and rear. The exhaust hole 17 is formed in the upper surface of the inner lid 6 and is open to communicate with a region in the outer frame 20 covered with the hidden lid 7. More specifically, an inner frame 21 different from the outer frame 20 is formed inside the outer frame 20, and the exhaust hole 17 is configured to be released into the inner frame 21. Is a gas guide space 22.

  As shown in the plan views of FIGS. 4 and 6, a standing wall 23 is erected on the inner side of the inner frame 21 in the inner lid 6 at a position corresponding to each insertion port 18. These standing walls 23 are configured such that the upper end surface of the standing wall 23 comes into contact with the lower surface of the hidden lid 7 when the hidden lid 7 is attached to the inner lid 6. The left-right direction separation distances L of these standing walls 23 are evenly arranged, and the left-right direction separation distances L coincide with the left-right width of the cell 2. In particular, the left-right direction distance L between the left and right upright walls 23 and the outer frame 20 is equal to the left-right upward separation distance L of the other upright walls 23. These standing walls 23 have cutouts 25 on the front and rear sides, and alternately on the inner frame 21 side.

  As shown in the bottom view of FIG. 7, a plate-like partition wall 27 that protrudes downward is formed between the insertion openings 18 that are integrally formed on the lower surface of the inner lid 6. The separation distance L in the left-right direction of the partition walls 27 coincides with the separation distance L in the left-right direction of the standing wall 23, that is, the left-right width of the cell 2. These partition walls 27 have concave matching portions 28 that are alternately cut out on the front side and the rear side, respectively. The notch surfaces 30 and 31 before and after forming the concave mating portion 28 are formed to be inclined so as to become narrower upward. It is preferable that the start end portions 32 and 33 of the notch surfaces 30 and 31 in the adjacent partition walls 27 are in a positional relationship having an overlap when they are projected sideways. Further, the lower end portion of the insertion opening 18 and the lower end surface of the partition wall 27 are set at substantially the same height.

  In the embodiment of the present invention, the 6-cell type storage battery 1 is described, and the left and right widths of the cells 2 are formed equally. And although not shown in figure, the upper part of the cell wall 34 of the cell 2 is formed in the relative shape with the partition wall 27 when it sees from a side view. That is, a concave mating portion 28 and a relative convex mating portion 35 are formed on the upper portion of the cell wall 34 (see FIG. 5). That is, when the inner lid 6 is placed and fitted to the battery case 3, the concave mating portion 28 and the convex mating portion 35 are overlapped in the vertical direction to form a region partitioned for each cell 2 by the partition wall 27. As a result, the traffic of the gas 16 between the cells 2 is blocked.

  The hidden lid 7 is fitted from above to the rear side of the inner lid 6 so as to cover a part of the upper surface of the inner lid 6. As shown in the bottom view of FIG. 8, on the lower surface of the hidden lid 7, an alignment frame 36 having the same shape as the inner frame 21 overlapping the upper end surface of the inner frame 21 from above is formed. A weight wall 37 that overlaps the upper end surface from above is formed. The weight wall 37 also has notches 26 alternately on the front side and the rear side, and the exhaust chamber 38 described later is provided by these notches 26 in a state where the hidden lid 7 is attached to the inner lid 6 (sealed state). A guide path 40 for guiding the gas 16 is formed. As shown in the half cross-sectional view of FIG. 9, locking claws 41 are formed on the front and rear portions of the hidden lid 7 so as to extend downward and engage with locking notches 6 a formed on the inner lid 6. .

  Reference numeral 7 a in FIGS. 8 and 9 denotes an annular protrusion that is located above the insertion opening 18 when the concealed lid 7 is attached and prevents the electrolyte from scattering from the insertion opening 18. Reference numeral 7b denotes a holding claw that is fitted to a predetermined standing wall 23 from both sides when the concealed lid 7 is attached to facilitate holding the weight wall 37 in place. Reference numeral 7c denotes a concave surface that overlaps with an arc surface of a shielding wall 46 to be described later on the front side, and convex pieces 7d are formed on both sides to form the concave surface 7c.

  Here, the exhaust chamber 38 will be described. As shown in FIGS. 5, 6, and 10, the exhaust chamber 38 is not located in the inner lid 6 portion corresponding to the uppermost cell 2 at the upper side, but is located in the second cell 2 from the right end adjacent to the rightmost cell 2. It is formed behind the portion of the inner lid 6 corresponding above. In other words, it is arranged between the standing wall 23 (23a) at the right end and the standing wall 23 (23b) adjacent thereto. The exhaust chamber 38 is formed behind the portion of the inner lid 6 because the notch 25 in the standing wall 23 at the right end is disposed rearward. Furthermore, the exhaust chamber 38 is formed in a circular bottomed concave shape in plan view that is recessed downward, and a stepped surface on which the outer peripheral portion of the explosion-proof filter 43 is placed in the middle of the peripheral wall 42 in the vertical direction. 44.

  In the outer periphery of the exhaust chamber 38, the front side is surrounded by an arcuate introduction wall 45 lower than the standing wall 23, and the rear side is surrounded by the arc-shaped shielding wall 46 having the same height as the standing wall 23. The arc center of the shielding wall 46 is integrally formed with the inner frame 21. Further, when the front end face 47 of the shielding wall 46 and the notch 25 are projected sideways, the front end face 47 of the shielding wall 46 is located between the notches 25.

  In particular, as shown in FIG. 10, a part of the outer peripheral wall 42 forming the exhaust chamber 38 on the exhaust pipe 13 side is an extension pipe 48 that extends toward the exhaust pipe 13, and the extension pipe 48 is the exhaust pipe 13. The extension pipe 48 and the exhaust pipe 13 are formed with an exhaust passage 50 at the center thereof, and the exhaust passage 50 communicates the internal space of the exhaust chamber 38 with the exhaust port 51 at the end of the exhaust pipe 13. doing.

  In the storage battery 1 having the above configuration, when the inner lid 6 is fitted to the battery case 3 from above, the concave matching portion 28 of the partition wall 27 and the convex matching portion 35 of the cell wall 34 are matched. In this manner, the partition wall 27 is provided with the concave mating portion 28 and the cell wall 34 is provided with the convex mating portion 35 so that the notch surfaces are aligned with each other, so that the inner lid can be easily and accurately attached to the battery case 3. 6 can be mounted. And since the cells 2 are shielded by matching the concave mating portion 28 of the partition wall 27 and the convex mating portion 35 of the cell wall 34, the gas 16 does not come and go between the cells 2. For this reason, it is possible to prevent the gas 16 generated in the cell 2 from being absorbed in the other cells 2, and to suppress the unbalance of the cell 2.

  When the hidden lid 7 is attached to the inner lid 6 from above, the insertion port 18 and the like are covered and the complicated components are not visible to the user, so the storage battery 1 is neat and good looking, By attaching the hidden lid 7 to the inner lid 6 from above, the weight wall 37 of the hidden lid 7 overlaps the standing wall 23 of the inner lid 6 from above, and the notches 25 and 26 are formed in the hidden lid 7 and the weight wall 37. A guide path 40 for guiding the gas 16 discharged from the insertion port 18 to the exhaust chamber 38 is formed at the matched position.

  The gas 16 discharged from the insertion port 18 is guided to the exhaust chamber 38 and communicates with the cell 2 from the extension pipe 48 to the exhaust pipe 13 through the exhaust passage 50 formed at the center thereof. Without being discharged from the exhaust port 51 at the end of the exhaust pipe 13. Since the gas 16 does not come and go between the cells 2 as described above, the gas 16 gathers in the exhaust chamber 38 and is discharged from the exhaust port 51 at a time. Since there is no imbalance in the voltage or the like due to absorption of the gas, and the exhaust chamber 38 is formed in a region corresponding to the cell 2 adjacent to the end cell 2, the lid 5 in the portion corresponding to the end cell 2 ( Since the structure of the inner lid 6) can be made clear so that the left and right widths of each cell 2 can be made uniform, the unbalance of the cells 2 can be prevented more reliably and the battery life of the storage battery 1 can be extended. Can do.

  Further, since the tip of the exhaust pipe 13 does not protrude sideways from the inner lid 6, the gas battery 16 can be reliably discharged without losing the compactness of the storage battery 1, and the exhaust port 51 is flat (for example, Since it does not open to the side surface 12) of the recess 11, the exhaust port 51 can be prevented from being clogged with dirt or the like. Alternatively, even if the exhaust port 51 is clogged, the gas 16 can be discharged from the cut 15, and a reduction in exhaust efficiency can be suppressed.

  Although the 6-cell type storage battery 1 has been described in the above embodiment, the exhaust chamber 38 is formed in a region corresponding to the cell 2 adjacent to the end cell 2 even in the 3-cell type storage battery 1. In the same manner as described above, the left and right widths of the cells 2 can be made equal by discharging from the side of the lid (inner lid 6).

The whole top view of the storage battery which shows embodiment of this invention Same front view Same side view Similarly front longitudinal section Same side sectional view Similarly, a plan view showing the gas flow with the hidden lid removed Similarly bottom view of the inner lid Similarly, the bottom view of the hidden lid Half-sectional view of the hidden lid Similarly, a partially enlarged longitudinal sectional view mainly including an exhaust chamber, an extension pipe and an exhaust pipe

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Storage battery, 2 ... Cell, 3 ... Battery case body, 6 ... Inner lid, 7 ... Hidden lid, 13 ... Exhaust pipe, 15 ... Cutting, 16 ... Gas, 18 ... Insertion part, 23 ... Standing wall, 25 , 26 ... notches, 27 ... partition walls, 28 ... concave mating parts, 34 ... cell walls, 35 ... convex mating parts, 37 ... weight walls, 38 ... exhaust chambers, 40 ... guide passages, 48 ... extension pipes, 50 ... exhausts Road, 51 ... exhaust

Claims (3)

A battery case body having a plurality of cells arranged side by side to accommodate a group of electrode plates composed of a plurality of electrode plates, a lid body having a side wall and covering the battery case body from above, An electrode terminal provided on the lid at a position corresponding to each cell arranged at the end,
An exhaust hole for exhausting gas generated in the cell from the cell at a position corresponding to each cell is formed in the lid, and an exhaust chamber provided with a filter is provided while collecting the gas exhausted from the exhaust hole, An exhaust path is formed for guiding the gas generated in each cell toward the exhaust chamber, an exhaust port for exhausting the gas from the side wall to the outside is formed, and the exhaust port communicates with the exhaust chamber Is a sealed lead-acid battery provided with
The exhaust chamber is provided at a position corresponding to a cell located inwardly in the left-right direction of the end cell , the exhaust passage extends in the left-right direction of the cell, and the exhaust port is provided in the side wall closer to the exhaust chamber. Is provided ,
2. The sealed lead-acid battery according to claim 1, wherein a length of the exhaust path is equal to or greater than a length of one cell in the left-right direction.   3. The sealed lead-acid battery according to claim 1, wherein three or more cells are arranged side by side, and an exhaust chamber is provided at a position corresponding to a cell arranged next to the end cell.   A concave portion that is recessed toward the center side of the lid body in a state where the battery case body is covered is provided on the side portion of the lid body, communicates with the exhaust chamber, protrudes laterally from the concave portion, and the tip is a lid The sealed lead-acid battery according to claim 1 or 2, wherein an exhaust pipe that does not protrude laterally from the outer edge of the body is provided, and an exhaust port is formed at a tip of the exhaust pipe.

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