JP5360536B2 - Lead acid battery - Google Patents

Description

  The present invention relates to a lead-acid battery that is particularly suitable for motorcycles or automobiles, and more specifically, a battery case provided with at least one cell chamber, a lid that covers the upper opening of the battery case, and a cell chamber. The present invention relates to a lead storage battery including an upper lid that closes an upper end opening of the lid body so as to form a guide path on the lid body for guiding the gas exhausted from an exhaust hole formed in the lid body to the outside.

The lead storage battery collects the gas generated in the cell chamber from the exhaust hole provided in the lid body to a specific cell chamber through the space formed between the lid body and the upper lid, and then collects the collected gas to the exhaust hole. Since the exhaust filter is configured to discharge from the second exhaust hole to the outside of the battery, the porous filter is not provided in all the exhaust holes, but only in the second exhaust hole. The number of parts can be reduced as compared with the case of the configuration of discharging to
And the thing of the structure which discharges | emits immediately the gas which moved upwards from the said 2nd exhaust hole from the discharge port formed in the vicinity of this 2nd exhaust hole is proposed (for example, refer patent document 1).
JP 2002-324537 A (see FIG. 1)

The lead-acid battery having the configuration of Patent Document 1 will be described using the reference numerals of Patent Document 1. The upper cover 19 is joined to the upper end of the side wall provided on the peripheral edge of the inner cover 11, and is surrounded by the inner cover 11 and the upper cover 19. A semi-enclosed space is formed, partition walls 15 and 16 are formed from the peripheral edge of the second exhaust hole (exhaust port 12) and the second exhaust hole (exhaust port 12) toward the gas exhaust port 14, A groove 13 is formed in a portion surrounded by the walls 15, 16, and the groove 13 is opened to the outside at the gas discharge port 14, and the upper ends of the partition walls 15, 16 are joined to the upper lid 19 without a gap. The groove 13 is formed in a tunnel shape, and the exhaust path (groove 13) and the semi-sealed space are hermetically isolated.
However, in the lead storage battery having the above-described configuration, the exhaust path (groove 13), the floor surface of the gas discharge port 14, and the floor surface of the inner lid 11 are at the same level in the height direction. May move in the long side direction along the periphery of the upper lid 19 and reach the vicinity of the positive and negative electrode terminals 17 and 18.

  In view of the above-described situation, the present invention intends to provide a lead storage battery having a structure in which discharged gas does not reach the vicinity of a terminal.

Lead-acid battery of the present invention, for the above-mentioned problem solution, and the container having a cell chamber partitioned into a plurality, a lid for covering an upper opening of the electrolyte bath, are formed in the upper surface of the lid member An upper lid for closing the concave portion, and terminals located at both ends in the left-right direction of the lid body, and the concave portion includes a bottom wall forming a bottom portion and a vertical wall raised upward from an outer peripheral edge of the bottom wall. has, on the lid, and an exhaust hole for exhausting the gas from the plurality of cell chamber, respectively, and different from the second exhaust hole and the exhaust hole to collect gas that is exhausted from the exhaust hole to the particular cell chamber A space for collecting the gas exhausted from the exhaust hole to a specific cell chamber side, and a guide path for guiding the gas from the second exhaust hole to the outside. upper lid, closed by the upper lid, the outlet of the guide path is formed in the longitudinal wall, before The guide path includes an upper guide part for moving the gas discharged from the second exhaust hole upward, a horizontal guide part for moving the gas from the upper guide part in the horizontal direction, and a gas from the horizontal guide part. A first guide path including a lower guide section that moves downward, and a second guide path that guides gas from the lower guide section to the discharge port are provided.
According to the above Symbol Configuration movement, gas generated from the cell chamber of the multiple, the guide route through the exhaust hole, or moves into the space and the guide path, to the discharge port through the first guide path and the second guide path And discharged to the outside through the discharge port.
And since the said 1st guide path | route is comprised from an upper guide part, a horizontal guide part, and a lower guide part, and also has the 2nd guide path | route, the level of the height direction of a discharge port is set to the height direction of an upper cover. The gas can be made difficult to reach the vicinity of the terminal by lowering the level.
In addition, by providing the second guide path so that the gas guided downward by the lower guide portion bypasses the groove and is guided to the discharge port, the level in the height direction of the discharge port is set to the height of the upper lid. Can be lower than the direction level.

The height of the discharge port is lower than the height of the upper lid .

Further, the discharge port is characterized in that it includes a cutout portion that allows gas to be discharged from the radial direction of the discharge port.
As described above, by providing the cutout portion that allows gas to be discharged from the radial direction of the discharge port, even when a foreign object comes into contact with the discharge port and the surface of the discharge port is closed, the cutout from the second exhaust hole passes through the cutout portion. Gas can be discharged reliably.

  Since the first guide path is composed of an upper guide part, a horizontal guide part, and a lower guide part, the level in the height direction of the discharge port is made lower than the level in the height direction of the upper lid, and the discharged gas Can be made difficult to reach the vicinity of the terminal.

  1 and 2 show a lid 1 of the lead storage battery of the present invention. FIG. 1 shows a state in which an upper lid 5 to be described later is mounted, and FIG. 2 shows a state before the upper lid 5 to be described later is mounted. ing. The lid 1 is formed of a synthetic resin in a rectangular shape in a plan view, and covers an upper opening of a battery case (not shown) provided with a plurality of partitioned cell chambers. The lead-acid battery provided with the lid 1 is particularly suitable when mounted on a vehicle such as a motorcycle or an automobile, but can also be used for other purposes. 1 and 2, the long side direction of the lid 1 is the left-right direction, and the direction orthogonal to the long side direction is the front-rear direction.

As shown in FIG. 2, the lid 1 is provided with a pair of left and right terminals 2 and 3 on one long side (front end in the front-rear direction) so as to be located at both ends in the long side direction (left-right direction), respectively. A first lid portion 1A and a second lid portion 1B having an upper surface higher than the upper surface of the first lid portion 1A are provided. And the recessed part 4 dented below is formed in the upper surface of the said 2nd cover part 1B.
The concave portion 4 is formed over a wide range from the end on the first lid portion 1A side of the upper surface of the second lid portion 1B to a position slightly closer to the rear side than a position halved in the front-rear direction. . Moreover, by providing the flat surface 1F without the recessed part 4 on the other long side (front-rear direction rear end side), it can be used as a space for attaching a seal or the like with a model number or the like on the flat surface 1F. I am doing so. As described above, the flat surface 1F on the upper surface of the lid 1 can be used as a space for sticking a sticker, and if a reference symbol for checking various data is written on the sticker, a process before the upper lid 5 is attached. Data, for example, data at the time of liquid injection, can be collated based on the reference numerals (conventionally, if described based on Patent Document 1, such a seal is provided after the top lid 19 is mounted, that is, liquid injection is performed. Since the upper lid 19 was attached to the surface of the upper lid 19, even when such a reference symbol was written on the seal, the data at the time of injection could not be verified based on the reference symbol). In FIG. 2, the left terminal 2 is a negative terminal, and the right terminal 3 is a positive terminal.

  The recess 4 has a bottom wall 4A that forms the bottom, and a vertical wall 4B that rises upward from the outer peripheral edge of the bottom wall 4A. Further, inside the concave portion 4, an annular projecting portion 4 </ b> C projecting upward is provided at a portion of the bottom wall 4 </ b> A located inside the vertical wall 4 </ b> B. Although the upper surface of this protrusion 4C is lower than the height of the vertical wall 4B, it does not necessarily have to be the same height at any position. As will be described later, the outer peripheral edge 5G of the upper lid 5 covers the groove 4M when the lower end of the joint portion 5C of the upper lid 5 and the projecting portion 4C of the lid body 1 are melted and integrated as described later. At the same time, the upper surface of the upper lid 5 and the flat surface 1F of the lid 1 are arranged on substantially the same plane.

  As shown in FIGS. 2 and 3, the bottom wall 4A inside the protrusion 4C is provided with exhaust holes 4D for exhausting gases from the plurality (six in the figure) of the cell chambers. As shown in FIGS. 1, 2, and 7A, 7B, 7C, and 7D, the gas exhausted from the plurality of exhaust holes 4D is collected to a specific cell chamber side. In order to form this space, an upper lid 5 that closes the inside of the protruding portion 4C is provided. The protruding portion 4C is formed in a substantially rectangular shape in plan view of FIG. 2, and includes a curved portion in which that portion enters the inside so as to bypass a second exhaust hole 4F described later. Further, the bottom wall 4A is formed on an inclined surface positioned downward toward the exhaust hole 4D, and the electrolyte solution escaped from each exhaust hole 4D can be returned to the corresponding exhaust hole 4D side. It is designed to function as a possible guide surface. Furthermore, it is provided with extending portions 4E and 4E that extend inward from the opposing positions of the protruding portion 4C and form gaps located between the adjacent exhaust holes 4D, and only gas exhausted from the exhaust holes 4D is provided. The inside of the protrusion 4C is freely moved so that the electrolyte that has escaped from the exhaust hole 4D can be prevented from moving toward the other adjacent exhaust hole 4D as much as possible.

As shown in FIG. 2, FIG. 3 and FIG. 4C, a pair of left and right cylinders that are welded by inserting a pole column (not shown) for taking out electric power, extending from the battery case, into the recess 4. The bushings 6 and 7 are embedded. The bushings 6 and 7 and the bushings 6 and 7 and the lower side of the terminals 2 and 3 juxtaposed in the horizontal direction are connected by a conductive portion (not shown).
The terminals 2 and 3, the bushings 6 and 7, and the conductive portion are integrally formed of lead or a lead alloy to constitute a terminal portion, and the conductive portion is embedded in the lid 1.

  The upper lid 5 is made of synthetic resin, and as shown in FIG. 7B, the joint 5C having the same outer shape and the same size as the projection 4C joined to the projection 4C, and the An outer peripheral edge 5G that covers an annular groove 4M formed between the protrusion 4C and the vertical wall 4B is provided. After the lower end of the joint 5C of the upper lid 5 is in a molten state, the protrusion 4C of the recess 4 By combining, both can be melted and integrated. The second exhaust hole 4F is provided with a porous filter and a valve (not shown) for the purpose of explosion-proof, prevention of backflow of gas from the outside, and adjustment of internal pressure. The joint 5C is also provided with portions corresponding to the pair of extending portions 4E and 4E provided at five locations of the projecting portion 4C, and these are also referred to as the joint 5C.

  The material of the lid 1 and the upper lid 5 is preferably a thermoplastic resin such as polypropylene resin, but may be other synthetic resins. When the upper lid 5 is heat-welded to the lid body 1, it is preferable that both materials are the same.

  A second exhaust hole 4F different from the exhaust hole 4D formed in the bottom wall 4A is provided in the bottom wall 4A provided with the fourth exhaust hole 4D from the left in FIG. 1, and the cell provided with this exhaust hole 4D A guide path is formed in the chamber (specific cell chamber) to collect gas from other cell chambers through the exhaust hole 4D and guide the gas from the second exhaust hole 4F to the outside, bypassing the groove 4M. Has been. Note that the specific cell chamber may not be the above-described place. That is, the guide path is shown in FIG. 7B, which protrudes downward from the lower surface of the upper lid 5 and protrudes from the bottom wall 4A so as to match the annular joint 5T. The first guide path 9 (see FIGS. 5 (a) and 6) formed by joining the protruding portion 4T and the gap between one end of the first guide path 9 and the discharge port 4K. The projecting portion 4C that forms the groove 4M, the bottom wall 4A, and the tunnel-shaped second guide path 10 that is formed by partially using the vertical wall 4B.

As shown in FIGS. 5 (a), (b), (c) and FIG. 6, the first guide path 9 includes an upper guide portion 9A for moving the gas from the second exhaust hole 4F upward, It is formed by a horizontal guide portion 9B that moves the gas from the upper guide portion 9A in the horizontal direction and a lower guide portion 9C that moves the gas from the horizontal guide portion 9B downward, and the gas from the lower guide portion 9C is The second guide route 10 is handed over.
The upper guide portion 9A guides the gas from the second exhaust hole 4F up to a predetermined height above the cylindrical first upper guide portion 9a and the gas from the first upper guide portion 9a further upward. Accordingly, a cylindrical second upper guide portion 9b having a larger diameter than the first upper guide portion 9a is provided.
The horizontal guide portion 9B includes a left-right direction guide portion 9c that moves gas to one side in the left-right width direction (right side in FIG. 2) of the lid 1, and a gas guided to the end of the left-right direction guide portion 9c in the guide direction. Is provided with a front-rear direction guide portion 9d that moves the lid 1 in the thickness direction (front-rear direction orthogonal to the left-right width direction) to one side (lower side in FIG. 2).
By the way, when the lead storage battery is mounted on a car and used, the gas from the second exhaust hole 4F moves through the upper guide portion 9A, the horizontal guide portion 9B, the lower guide portion 9C, and the second guide path 10 to the discharge port. Although discharged from 4K, as shown in FIG. 5C, the level in the height direction of the discharge port 4K is lower than the level in the height direction of the upper lid 5 (the level in the height direction of the horizontal guide portion 9B). Thus, the exhausted gas can be made difficult to reach the vicinity of the terminal.

  The second guide path 10 has a discharge port 4K formed in the vertical wall 4B by inserting a rod (a hole-forming rod) into the mold, and forward of the lower guide portion 9C from the vertical wall 4B. A tunnel-like through hole 10A is formed between the side wall 9h and the side wall 9h.

In addition to the fact that the level in the height direction described above can be determined by forming the guide path 8 for guiding the gas discharged from the second exhaust hole 4F to the discharge port 4K, bypassing the lower side of the groove 4M. Thus, the groove 4M and the guide path 8 are not connected, and the discharge port 4K can be connected only to the guide path 8.
Accordingly, with the upper lid 5 attached, a guide route is provided by applying pressurized air into the groove 4M with the space between the inner surface 4b of the vertical wall 4B and the outer peripheral surface 5N of the upper lid 5 shown in FIG. 8 and the joint portion 5T of the lid 1 that separates the groove portion 4M and the joint portion 5T of the upper lid 5, and the joint portion 4C of the projection portion 4C of the lid body 1 that separates the space and the groove portion 4M from the joint portion 5C. The poor bonding state can be detected by the presence or absence of a decrease in the pressure of the pressurized air.

  As shown in FIG. 6, the discharge port 4 </ b> K includes an annular donut-shaped protrusion 4 </ b> G protruding from the surface of the vertical wall 4 </ b> B constituting the lid body 1, and a protrusion 4 </ b> G on a part of the protrusion 4 </ b> G in the circumferential direction. Three cutouts 4L, 4N, and 4P are provided that allow the discharged gas to be discharged from the radial direction of the protrusion 4G. The three cutouts extend through the center of the discharge port 4K to the left and right cutouts 4L and 4P formed on both sides in the left-right direction of the lid 1, and extend to the lower end side of the lid 1 through the center of the discharge port 4K. The lower notch 4N is formed as described above. Accordingly, the gas is discharged through the three notches 4L, 4N, and 4P even in the state where the foreign matter is in contact with the surface of the protrusion 4G while omitting the notch extending upward so that dust does not easily collect. It can be done. The number of notches 4L, 4N, and 4P, the size of the width, and the like can be freely changed. In addition, you may provide the notch by denting the surface of the vertical wall 4B, without providing the said protrusion 4G.

In order to perform positioning when both the lid 1 and the upper lid 5 are mounted, one of the lid 1 and the upper lid 5 is provided with a locked portion, and the other is locked with the locked portion. A stop is provided.
As shown in FIGS. 7A to 7D, the locking portion protrudes downward from the lower surface of the upper lid 5 and has a circular cross-section and a hollow cylindrical shape (the inside may be a solid rod-like body). ) Having a pair of left and right cylinders 5D and 5E.
Further, as shown in FIG. 2, the locked portion includes a pair of left and right holes 11, 12, and one of the pair of left and right holes 11, 12 is locked to the hole 11. The portion 5D is formed in a size that prevents the horizontal movement of the portion 5D, and the other hole 12 is formed in a long hole in the direction opposite to the pair of holes 11, 12, that is, an oval shape.
Therefore, as described above, before the joint portions 5C and 5T of the upper lid 5 are melted and integrated with the protrusions 4C and 4T of the lid body 1, a pair of locking portions with respect to the pair of holes 11 and 12 is provided. By positioning 5D and 5E, the positioning of the protrusions 4C and 4T of the lid 1 and the joints 5C and 5T of the upper lid 5 is completed, and the lid 1 and the upper lid 5 are moved closer to each other from that state. The projecting portions 4C and 4T of the lid 1 and the joint portions 5C and 5T of the upper lid can be reliably joined. Even if it is difficult to position the lid body 1 and the upper lid 5 due to a difference in shrinkage after molding, a temperature change after molding, a change with time, etc. by forming one hole 12 as a long hole. Even when the upper lid 5 expands and contracts in the longitudinal direction according to the room temperature, the long hole absorbs it well, and the engagement is performed smoothly.

  Further, as shown in FIGS. 4A to 4D, the terminals 2 and 3 are in the rectangular top plate portions 2A and 3A and in the front view of the four sides of the top plate portions 2A and 3A. Front plate portions 2B, 3B hanging downward from three sides other than the right side, rear plate portions 2C, 3C, left plate portions 2D, 3D, top plate portions 2A, 3A and front plate The parts 2B and 3B are formed with through holes 2a, 2b and 3a, 3b for penetrating bolts (not shown), and the bolts (FIG. 2) penetrated through the through holes 2a, 2b and 3a, 3b. A nut (not shown) is screwed into a nut (not shown) inserted into the terminal so that the nut can be fixed to the terminal with a bolt. Then, an external lead wire (wire that can be connected to an on-vehicle electrical component or the like) that is not illustrated is sandwiched and fixed between these bolts and nuts.

  In the above embodiment, the guide path 8 for guiding to the discharge port 4K is formed by bypassing the groove 4M by forming the tunnel-shaped through hole 10A, but the second exhaust hole 4F is formed by the U-shaped wall portion. The guide path 8 may be formed by bypassing the groove portion 4M by surrounding the wall portion and connecting both end portions of the wall portion to the vertical wall 4B. In this case, if the horizontal guide portion 9B is provided with a slope, the level in the height direction of the discharge port 4K can be made lower than the level in the height direction of the upper lid 5, but the lower guide portion 9C is not provided, The horizontal guide portion 9B is not provided. However, since the level in the height direction of the discharge port 4K can be set as described above and the discharged gas can hardly reach the vicinity of the terminal, the continuous horizontal guide portion 9B and the lower guide portion can be obtained. 9C.

  Moreover, in the said embodiment, although joined part 5C, 5T of the upper cover 5 was fuse | melted and integrated according to the protrusion parts 4C, 4T of the cover body 1, it joined the joint parts 5C, 5T of the upper cover 5, and a cover body. The structure which integrates 1 protrusion part 4C, 4T with an adhesive agent may be sufficient.

  Furthermore, in the above-described embodiment, the horizontal guide portion 9B is guided to the left and right direction guide portion 9c that moves the gas to one side in the left and right width direction (right side in FIG. 2) of the lid 1 and the end of the left and right direction guide portion in the guide direction. The front and rear direction guide portion 9d that moves the generated gas to one side in the front and rear direction of the lid body 1 (downward in FIG. 2) is configured, but the front and rear direction guide portion 9d is omitted and only the left and right direction guide portion 9c is configured. May be. In FIG. 2, the gas discharge port 4K protrudes from the front surface of the vertical wall 4B. However, when the gas discharge port 4K is composed of only the left and right direction guide portion 9c, it is flush with the front surface of the vertical wall 4B. Can be. Moreover, although the left-right direction guide part 9c was set as the structure moved to the right side in FIG. 2, the structure moved to the left side may be sufficient. Further, the horizontal guide portion 9B is omitted by shifting the position of the second exhaust hole 4F shown in FIG. 2 to the rear side in the front-rear direction, and only the front-rear direction guide portion along the front-rear direction with respect to the second exhaust hole 4F. It can also consist of.

  In the embodiment, the space exhausted from the exhaust hole 4D for each cell chamber is collected in a specific cell chamber, and the gas collected in the space is guided to the outside through the second exhaust hole 4F. However, if the entire concave portion 4 of the lid 1 is used as the guide path, the second exhaust hole 4F for exhausting air from a specific place is omitted and exhausted from an arbitrary place. You can Moreover, in the said embodiment, although the discharge port 4K is provided in the front surface, if the direction and length of a 1st guide route or a 2nd guide route are considered, it can be provided in a side surface or a rear surface.

  Moreover, in the said embodiment, although the battery case provided with the several cell chamber was shown, the battery case provided with one cell chamber may be sufficient. In this case, an exhaust hole for discharging from the cell chamber to the outside through the guide path is provided in a state communicating with the guide path.

It is a top view of the cover body equipped with the upper cover. It is a top view of the cover body before mounting | wearing with an upper cover. It is a bottom view of a lid. (A) is a right side view of the lid, (b) is a front view of the lid, (c) is a cross-sectional view taken along line AA in FIG. 2, and (d) is a cross-sectional view taken along line AB in FIG. . (A) is a top view which shows the circumference | surroundings of a 2nd exhaust hole, (b) is a longitudinal cross-section of a 2nd exhaust hole, (c) is a figure which shows the outline of a guidance path | route. It is a perspective view which shows the periphery of a 2nd exhaust hole. An upper lid is shown, (a) is a plan view thereof, (b) is a bottom view thereof, (c) is a front view thereof, and (d) is a sectional view taken along line CC in FIG. 7 (b).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cover body, 1A ... 1st cover part, 1B ... 2nd cover part, 1F ... Flat surface, 2, 3 ... Terminal, 2A, 3A ... Top plate part, 2B, 3B ... Front plate part, 2C ... Rear plate Part, 2D, 3D ... left plate part, 2a, 2b, 3a, 3b ... through hole, 4 ... recess, 4A ... bottom wall, 4B ... vertical wall, 4C, 4T ... projecting part, 4D ... exhaust hole, 4E ... extension Outlet, 4F ... second exhaust hole, 4G ... protrusion, 4K ... discharge port, 4M ... groove, 4T ... projection, 4L, 4N, 4P ... notch, 4b ... inside surface, 5 ... top lid, 5C, 5T ... Joining part, 5D, 5E ... locking part, 5G ... outer peripheral edge, 5N ... outer peripheral surface, 6, 7 ... bushing, 8, 9, 10 ... guide path, 9A ... upper guide part, 9B ... horizontal guide part, 9C ... Lower guide part, 9a ... 1st upper guide part, 9b ... 2nd upper guide part, 9c ... Left-right direction guide part, 9d ... Front-rear direction guide part, 9h ... Wall, 10A ... Through-hole, 1, 12 ... hole

Claims (3)

A battery container having a cell chamber partitioned into a plurality, a lid for covering an upper opening of the electrolyte vessel, and the upper lid for closing a recess formed in the upper surface of the lid body, the right and left end of the cover The recess has a bottom wall that forms a bottom portion and a vertical wall raised upward from an outer peripheral edge of the bottom wall, and the lid includes a plurality of cell chambers from the plurality of cell chambers. An exhaust hole for exhausting each gas, and a second exhaust hole different from the exhaust hole for collecting the gas exhausted from the exhaust hole in a specific cell chamber, and the gas exhausted from the exhaust hole is provided in a specific cell and space for collecting to the chamber side, to a guide path for guiding the gas from the second exhaust hole to the outside is formed on the lid, the upper lid body is closed by the upper lid, the guide path gas outlet is formed in the vertical wall, the guide route, which is exhausted from the second exhaust hole A first guide path comprising: an upper guide portion for moving the gas upward, a horizontal guide portion for moving the gas from the upper guide portion in the horizontal direction, and a lower guide portion for moving the gas from the horizontal guide portion downward And a second storage path for guiding the gas from the lower guide to the outlet. The lead acid battery according to claim 1, wherein a height of the discharge port is made lower than a height of the upper lid . The outlet is lead-acid battery according to claim 1 or 2, further comprising a notch that enables the discharge from the radial direction of the outlet.

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