WO2006129340A1 - Lead battery - Google Patents

Abstract

A lead battery employing a collective exhaust system and exhibiting excellent gas exhaust function and electrolyte leakage preventive function in which the electrolyte does not leak even when the battery turns sideways. In the lead battery equipped with a collective exhaustion mechanism, a partition wall is arranged to surround an opening consisting of an electrolyte circulation opening (33) and a gas exhaust opening (34), a cell communicating subchamber (35) sectioned from exhaust chambers (37, 37’, 37”) by the partition wall is provided, and the cell communicating chamber (35) is communicated with the exhaust chambers (37, 37’, 37”) through a cut (36) provided on the partition wall, and the cell communicating subchamber (35) is isolated from the exhaust chambers (37, 37’, 37”) by the partition wall excepting the cut (36).

Description

 Specification

 Lead acid battery

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a lead storage battery including an exhaust structure that discharges gas while preventing escape of an electrolytic solution.

 Background art

 [0002] The exhaust structure of a monoblock lead-acid battery having a plurality of cells is roughly divided into an individual exhaust system in which an exhaust plug is provided for each cell, and a gas exhausted from each cell catalyst once in an exhaust chamber. There is a collective exhaust system in which gas is concentrated from the exhaust chamber and exhausted to the outside. Compared to the individual exhaust system, the collective exhaust system requires fewer parts, and the volume of the upper space of the electrode plate can be reduced, and the battery size can be reduced without reducing the battery capacity. Because of its advantages such as the ability to escape and the amount of electrolyte escape, it has come to be widely used in lead-acid batteries for vehicles.

 [0003] Conventionally, there are several points related to collective exhaust of lead-acid batteries in that the electrolyte is prevented from escaping out of the battery in the form of mist or vapor, and the gas is discharged smoothly so that the internal pressure of the battery does not increase. Has been proposed. For example, a gas containing electrolyte mist and vapor flows in the exhaust chamber in the horizontal direction. During this time, the electrolyte mist and vapor are condensed to separate the gas and the electrolyte, and the gas is discharged to the outside. The electrolytic solution is refluxed into the cell (see Patent Document 1 and Patent Document 2).

 Patent Document 1: US Patent No. 4486516

 Patent Document 2: Japanese Patent Laid-Open No. 8-22815

 [0004] In order to increase the efficiency of separation of gas and electrolyte, a structure of collective exhaust in which the distance that the gas flows in the horizontal direction is made as long as possible has been proposed (see Patent Document 3).

 Patent Document 3: Japanese Patent Laid-Open No. 2001-84981

[0005] In addition, a porous filter is disposed at the gas discharge port leading to the outside of the exhaust chamber power battery to prevent discharge of mist and vapor of the electrolyte, and a space is provided below the filter to provide a filter. An exhaust structure has been proposed to prevent clogging by clogging with electrolyte (Patent text) (Ref. 4).

 Patent Document 4: Japanese Patent Laid-Open No. 6-176748

 Disclosure of the invention

 Problems to be solved by the invention

 [0006] In a lead-acid battery for in-vehicle use, the electrolytic solution surface undulates when the vehicle vibrates, or the electrolytic solution surface tilts when the vehicle is climbed. In the methods proposed in Patent Documents 1 to 3, when the electrolytic solution surface is wavy or inclined, the electrolytic solution passes through the gas discharge port that communicates the cell and the exhaust chamber, and the electrolytic solution force in the cell. S There was a risk of jumping into the exhaust chamber. In addition, when the battery is accidentally turned over, the electrolyte force S exhaust chamber force may overflow to the outside of the battery. In addition, there is a risk that the gas exhaust function may be impaired due to the lack of space on the upper lid side of the central exhaust chamber, or that the filter may not function due to the filter falling to the floor surface of the central exhaust chamber.

 [0007] Therefore, the present invention has been made in view of the drawbacks of the conventional lead-acid battery adopting the collective exhaust system, and is excellent in the gas discharging function and the electrolytic solution escape preventing function. The primary purpose is to provide a lead-acid battery that does not leak electrolyte when it is discharged.

[0008] Also, there is a method of providing exhaust passages directly connected to each cell separately from the exhaust chamber as a structure for collective exhaust, but at least one of exhaust chambers arranged in the same number as the number of cells. A centralized exhaust chamber is installed adjacent to one exhaust chamber, and exhaust gas is moved across the exhaust chambers, guided to the central exhaust chamber, and then exhausted outside the battery via the central exhaust chamber. A point force that requires a simple structure and a small space in the exhaust path is also preferable. In conventional batch exhaust type batteries, the cell spacing walls are arranged at equal intervals in the battery case and on the bottom surface of the inner lid (the side facing the cell) (just above the cell spacing wall). ), Exhaust chamber spacing walls were formed to form the same number of exhaust chambers as the number of cells. In the conventional exhaust structure, the volume of the exhaust chamber adjacent to the central exhaust chamber is reduced, and the electrolyte does not sufficiently condense while the gas passes through the exhaust chamber. There was a risk of leakage. In addition, when a suspension hook is provided on the side of the inner lid, the volume of the exhaust chamber positioned at both ends of the battery is reduced, and there is a drawback similar to that of the exhaust chamber adjacent to the concentrated exhaust chamber. . [0009] Therefore, the present invention has been made in view of the shortcomings of conventional lead-acid batteries adopting a collective exhaust system, and is excellent in gas discharge and electrolyte recovery functions, and can be electrolyzed even when the battery is tilted. The second purpose is to provide a lead-acid battery with excellent leakage prevention function that does not leak liquid.

 Means for solving the problem

[0010] In the present invention, the first object is achieved by adopting an exhaust structure for a lead-acid battery as follows.

 (1) A lead storage battery according to the present invention is surrounded by a battery case 2 that houses a plurality of cells, an inner lid 3 that covers the upper surface of the battery case 2, and an upper lid 4 that covers a recess 31 of the inner lid 3. The space is divided by exhaust chamber spacing walls 43 44 45 to provide the same number of exhaust chambers 37 37 '37 "as the number of cells, and adjacent exhaust chambers 37 37' 37" are arranged between the exhaust chambers. Bulkhead 43 44 Connected via notch or through-hole 67 in 45, exhaust chamber 37 37 '37〃 and cell at electrolyte wall 33 and gas outlet at floor 32 of inner lid 3 And a centralized exhaust chamber 41 that communicates with the exhaust chamber 37 37 '37, and the gas that also generates the cell force is guided to the exhaust chamber 37 37' 37〃. Thereafter, a lead storage battery having a mechanism for exhausting the battery collectively through the central exhaust chamber 41 is provided with a partition wall surrounding an opening formed by the electrolyte reflux port 33 and the gas discharge port 34. Place and A cell communication small chamber 35 partitioned from the exhaust chamber 37 37 '37 "by a partition wall, the cell communication small chamber 35 communicated with the exhaust chamber 37 37' 37〃 through a notch 36 provided in the partition wall, and the notch Other than 36, lead storage batteries are characterized in that the cell communication chamber 35 and the exhaust chamber 37 are separated by a partition wall.

(2) The lead storage battery according to the present invention is the storage battery according to (1), wherein the floor wall 32 of the exhaust chamber 37 37 '37 is lower as the distance from the communication portion with the cell communication small chamber 35 is smaller. The air chamber 37 37 '37 is provided with an inclination so as to increase as the distance of the communication portion with the cell communication chamber 35 increases, and the air chamber 37 37' 37 has three or more air / J, chambers by at least two partition walls 46 47. The partition 46 47 is provided with at least one notch 48 49, and the adjacent exhaust chambers 38 39 40 are separated by the notch 48 49 provided in the partition 46 47. Communicating, except for the notch 48 49, is separated by the partition wall 46 47, and the notch 48 49 provided in the adjacent partition wall 46 47 is connected to the inclination of the floor wall 32. It is a lead storage battery characterized by being arranged in a zigzag position.

 (3) The lead storage battery according to the present invention is the storage battery according to (2), wherein the partition walls 46, 47 dividing the exhaust chambers 37, 37 ', 37 "into exhaust small chambers 38, 39, 40 are provided on the floor surface. The angle Θ formed by the partition walls 46, 47 and the exhaust chamber spacing walls 43, 44, 45 is an acute angle, and the floor wall 32 is the lowest of the partition walls 46, 47. A lead-acid battery characterized in that the notches 48 and 49 are provided at positions.

 (4) The lead storage battery according to the present invention is the storage battery according to (2), wherein at least one of the plurality of exhaust chambers 37, 37 ′, 37g and the exhaust chamber 37 positioned at both ends of the battery. A central exhaust chamber 41 is disposed adjacent to the exhaust chamber, the exhaust chamber 37 and the central exhaust chamber 41 are partitioned by a partition wall 50, and the cell communication small chamber is formed by a notch or a through hole 51 provided in the partition wall 50. 35 is a lead storage battery characterized in that the exhaust chamber 40 and the central exhaust chamber 41 that are farthest from 35 are communicated with each other, and the exhaust chamber 37 and the central exhaust chamber 41 are separated by a partition wall 50 except for the notch or the through hole 51. .

 (5) The lead storage battery according to the present invention is the storage battery according to (1), wherein the concentrated exhaust chamber 41 includes a porous filter 71, and the porous filter 71 allows the upper lid 4 side and the inner lid 3 side. The space on the upper lid 4 side communicates with the outside of the battery via the exhaust path 73, and the floor surface of the central exhaust chamber 41 is a communication portion with the exhaust chamber 37. The lead storage battery is characterized in that the exhaust path 73 is disposed at a position close to the communication portion between the central exhaust chamber 41 and the exhaust chamber 37, and has an inclination so that the force increases as the force increases.

 (6) The lead storage battery according to the present invention is the storage battery according to (5), wherein a convex portion 72 is provided on the inner surface of the upper lid 4 forming the concentrated exhaust chamber 41, and the porous filter 71 is disposed on the upper lid 4. The lead storage battery is characterized in that a space on the side of the upper lid 4 is formed by being fitted to a provided cylindrical partition wall 50 for compartmentalized exhaust chamber.

 (7) The lead storage battery according to the present invention is the storage battery according to (1), wherein the floor wall 32 of the inner lid 3 is provided with a liquid injection opening 54 opened to each cell of the same number as the number of cells. A lead 53 characterized in that a liquid injection chamber 52 is partitioned by a partition wall 53 and an upper lid 4 surrounding the liquid injection opening 54, and the liquid injection chamber 52, the exhaust chamber 37 and the outside of the battery are hermetically sealed. It is a storage battery.

(8) The lead storage battery according to the present invention is the storage battery according to (1), wherein the inner lid 3 and And the upper lid 4 have the strength of the thermoplastic resin molding. Both the upper surface of the inner lid 3 and the inner surface of the upper lid 4 have an outer peripheral side wall 65, the exhaust chamber spacing walls 43, 44, 45, the partition walls of the cell communication small chamber 35, The partition wall 50 of the central exhaust chamber 41 and the partition walls 46 and 47 divided into the exhaust small chambers 38, 39, and 40 are provided, and the outer peripheral side walls 65 provided on the inner lid 3 and the upper lid 4 are heat-sealed to each other. The exhaust chamber spacing walls 43, 44, 45 provided on the inner lid 3 and the upper lid 4 are heat-sealed to each other so that the same number of exhaust chambers 37, 37 ', 37 g A lead storage battery characterized by forming a cell communication small chamber 35, exhaust small chambers 38, 39, 40, and a central exhaust chamber 41.

(9) The lead storage battery according to the present invention is the storage battery according to (8) described above, wherein the partition wall 50 provided on the inner surface of the upper cover 4 among the partition walls 50 partitioning the central exhaust chamber 41 and the exhaust chamber 37 has a thickness of The lead-acid battery is characterized in that it is larger than the thickness of the partition wall 50 provided on the upper surface of the inner lid 3.

(10) The lead storage battery according to the present invention is the storage battery according to (9), wherein rib-like protrusions 74 extending in the height direction of the partition wall 50 are formed on the outer surface of the partition wall 50 provided on the inner surface of the upper lid 4. It is a lead-acid battery characterized by the installation.

 (11) The lead storage battery according to the present invention is the storage battery according to (8), wherein the inner lid 3 is provided with an alignment pin 55 when overlapping the upper lid 4, and the alignment pin 55 is provided on the upper lid 4. The lead-acid battery is characterized in that a cylindrical hole 66 is provided for fitting.

 In the present invention, the first object is similarly achieved by adopting the following structure for the exhaust structure of the lead-acid battery.

(12) The lead storage battery according to the present invention is a space surrounded by a battery case 2 that houses a plurality of cells, an inner lid 3 that covers the upper surface of the battery case 2, and an upper lid 4 that covers a recess 31 of the inner lid 3. And the same number of exhaust chambers 37, 37 ', 37 "and at least one centralized exhaust chamber communicating with the exhaust chambers 37, 37', 37". 41, and an exhaust gas recirculation port 33 and a gas exhaust port 34 communicating with the cell and the exhaust chambers 37, 37, 37, and the floor wall 32 of the exhaust chamber 37, 3, 3 3 In a lead-acid battery equipped with a mechanism for exhausting gas that also generates force to the outside of the battery through the exhaust chambers 37, 37 ', -1 "and the central exhaust chamber 41, the exhaust chambers 37, 37', 37 cm floor wall 32 Surrounding the electrolyte recirculation port 33 on the wall facing the cell 32 and the cylindrical body 62 extending toward the cell and the gas discharge port 34 and facing the cell A lead-acid battery characterized in that a cylindrical body 63 is provided, and a cutout or a through-hole 75 is provided in the wall surface of the cylindrical body 63 that surrounds the gas discharge port 34 and extends into the cell.

(13) A lead storage battery according to the present invention is the lead storage battery according to the above (12), wherein the gas outlet 34 is an oval or rectangular opening.

 (14) The lead storage battery according to the present invention is the storage battery according to (12), wherein a local floor wall provided with the gas discharge port 34 among the floor walls 32 of the exhaust chambers 3, 1, 37 is provided. The lead storage battery is characterized in that 32 'is placed at a position farther away from the cell's electrolyte than the surrounding floor wall.

 In the present invention, the second object is achieved by configuring the exhaust structure of the lead-acid battery as follows.

 (15) A lead storage battery according to the present invention comprises a battery case 2 containing a plurality of cells separated from each other by cell spacing walls 57, 58, 59 arranged at equal intervals, and an upper surface of the battery case 2. Cover the inner lid 3

The inner lid 3 includes an upper lid 4 that covers the concave portion 31 of the inner lid 3, and the inner lid 3 includes the cell spacing walls 57, 58, 59 on the wall surface facing the cell, and the inner lid on the wall surface facing the upper lid 4. 3 with exhaust chamber spacing walls 43, 44, 45 that divide the space surrounded by the recess 31 and the upper lid 4 into the same number of exhaust chambers 37, 37 ', 37 "as the cells, and adjacent exhaust chambers 37, 37', 37 ^ff communicate with each other through a notch or through hole 67 provided in the exhaust chamber spacing walls 43, 44, 45, and the exhaust chambers 37, 37 ′, 37 ”and the cell are connected to the floor wall 32 of the inner lid 3. A centralized exhaust chamber 41 that communicates with the exhaust chamber 37 adjacent to at least one exhaust chamber 37 of the air chambers 37, 37 ', 37 ". The lead storage battery having a mechanism for exhausting the gas generated by the cell force to the exhaust chambers 37, 3 and 37 "and then exhausting them out of the battery via the central exhaust chamber 41, at least the central exhaust chamber 41 or a part of the exhaust chamber spacing wall 43 separating the exhaust chamber 37 adjacent to the exhaust chamber 37 and the exhaust chamber 37 ′ adjacent to the exhaust chamber 37, and the two exhaust chambers 37, 37 ′ and the openings 33, 34 This is a lead storage battery characterized in that the position is shifted compared to the cell spacing wall 57 that partitions two cells communicating with each other.

(16) The lead storage battery according to the present invention is the storage battery according to (15), wherein the concentrated exhaust chamber 41 is disposed adjacent to the exhaust chamber 37 located at the end of the battery, and the exhaust chamber spacing wall 43 This is a lead storage battery characterized in that a part or all of the battery is shifted toward the center of the battery compared to the cell spacing wall 57.

 (17) The lead storage battery according to the present invention is the storage battery according to (16), wherein cell spacing walls 57, 58, 59 are provided in parallel to the short side 11 of the side of the battery, and the concentrated exhaust chamber 41 is provided. It is a lead storage battery characterized in that it is provided adjacent to an exhaust chamber 37 located at the end on both short sides 11 side.

 (18) The lead storage battery according to the present invention is the storage battery according to (15), wherein a suspension hook 42 is provided at the center of both short sides of the inner lid 3, and an exhaust chamber 37 adjacent to the short side is provided. Part or all of the exhaust chamber spacing wall 43 that separates the adjacent exhaust chambers 37 ^ from the two exhaust chambers 37, 37

It is a lead-acid battery characterized in that its position is shifted compared to the cell spacing wall 57 that partitions two cells communicating with each other through the openings 33 and 34.

The invention's effect

 According to the battery of the present invention described in (1), it is possible to provide a lead-acid battery of a collective exhaust system that is less likely to leak electrolyte even when the battery is turned over.

 According to the batteries of the present invention described in the above (2) and (4), it is possible to provide a lead storage battery having an excellent function of separating exhaust gas and electrolyte mist contained therein and vapor. In addition, when the battery is turned over, it is possible to provide a lead-acid battery of a collective exhaust system that is less likely to leak electrolyte.

 According to the battery of the present invention described in (3) above, a lead storage battery in which the electrolyte solution condensed in the exhaust chamber is smoothly recirculated can be obtained.

 According to the battery of the present invention described in (5) above, it is possible to prevent the filter from being clogged and hindering gas discharge.

 According to the battery of the present invention described in (6) above, it is possible to ensure a space between the filter disposed in the concentrated exhaust chamber and the inner surface of the upper lid.

 According to the battery of the present invention described in the above (7) and (8), the electrolytic solution can be injected after the inner lid is attached, and the electrolytic solution leaks even when the battery is turned over. It can be a lead storage battery without fear.

(9) According to the battery of the present invention described in (10), when the upper end is heat-sealed to the inner lid, The partition to which the filter is fitted can be prevented from being deformed, and the filter can be prevented from coming off. According to the battery of the present invention described in (11), the upper lid can be mounted on the inner lid without causing a positional shift. In addition, it is possible to prevent water and foreign matter from entering the alignment fitting portion.

 [0014] According to the battery of the present invention described in the above (12) and (14), the collective exhaust system with a small risk of leakage of the electrolyte even when the electrolyte surface in the cell is wavy or the battery is tilted Lead-acid battery.

 According to the battery of the present invention described in the above (13) and (14), the lead-acid battery that makes it difficult for the gas discharge port to be clogged with an electrolyte or foreign matter, and the cell force can smoothly transfer gas to the exhaust chamber; can do.

 [0015] According to the battery of the present invention described in (15) above, when a centralized exhaust chamber is provided adjacent to any one of the exhaust chambers formed by the partition walls as many as the number of cells. In addition, the exhaust chamber adjacent to the central exhaust chamber has a sufficient size necessary for dew condensation of the electrolyte mist and vapor mixed in the exhaust gas while the gas flows in the exhaust chamber. A chamber can be formed. Also, even when the battery tilts and enters the electrolyte chamber in the cell, it forms an exhaust chamber that is large enough to contain the electrolyte that has entered the exhaust chamber and does not leak outside. be able to.

 According to the battery of the present invention described in (16) above, the exhaust path leading from the central exhaust chamber to the outside of the battery can be set short.

 According to the battery of the present invention described in the above (17), even if one central exhaust chamber is clogged, gas can be discharged out of the battery via the other central exhaust chamber.

 According to the battery of the present invention described in (18), the lead storage battery includes a suspension hook that is convenient to carry, and has an exhaust chamber having a sufficient size similar to the lead storage battery according to (15). It can be a pond.

 Brief Description of Drawings

FIG. 1 is a perspective view of the lead storage battery according to the present embodiment as viewed obliquely from above with the top cover removed. FIG. 2 is a plan view of the inner lid of the lead storage battery according to the same embodiment as seen from above.

 FIG. 3 is a plan view of the inner lid of the lead storage battery according to the embodiment as viewed from the cell side.

 FIG. 4 is a plan view showing an inner surface of an upper lid of the lead storage battery according to the same embodiment.

 FIG. 5 shows a state in which an upper lid is attached to the concave portion of the inner lid of the lead storage battery according to the embodiment,

2 is a cross-sectional view taken along line AA in FIG.

 FIG. 6 is a view showing a cross section and a side view of the upper lid portion of the concentrated exhaust chamber of the lead storage battery according to the same embodiment.

 FIG. 7 is a cross-sectional view taken along the line BB in FIG. 3, with the upper lid attached to the concave portion of the inner lid of the lead storage battery according to the embodiment.

 [FIG. 8] (a) is a sectional view taken along the line CC of FIG. 7, and (b) is a modification of (a).

 Explanation of symbols

 [0017] 1 ... lead-acid battery, 2 ... battery case, 3 ... inner lid, 4 ... upper lid, 5 ... positive electrode terminal, 6 ... negative electrode terminal, 11 ... short side, 21 ... side wall, 31 ... recess , 32… floor wall, 32 ^… local floor wall, 33 ··· electrolyte reflux port, 3 4 ··· gas outlet, 35 ··· Senore communication / J, chamber, 36 ··· notch, 37, 37 ', 37g… Air chamber, 3 8, 39, 40 ··· Exhaust chamber, 41 ··· Exhaust chamber, 42 ··· Hook for suspension, 43, 44, 45 ··· Exhaust chamber spacing wall , 46, 47 ···, partition wall, 48, 49 ··· notch, 50 ··· partition wall, 51 ··· notch or through hole, 52 ··· liquid injection chamber, 53 ··· partition wall, 54 ··· Opening (Liquid inlet) ······························· Pin for positioning (pin-shaped convex part) ···, 62, 63… Cylindrical body, 64 ··· Lower end, 65 ··· Outer peripheral partition wall, 66 ··· Cylindrical hole, 67 ··· Notch or through-hole, 68 ··· Baffle plate, 69 ··· · Notch, 70 ·· · Baffle plate ·······································································································

 BEST MODE FOR CARRYING OUT THE INVENTION

[0018] Details of the present invention will be described below with reference to an embodiment, but the present invention is not limited to this.

FIG. 1 is a perspective view of a 6-cell monoblock type lead-acid battery 1 according to an embodiment of the present invention, as viewed obliquely from above. 2 in FIG. 1 is a battery case, and the inside is divided into 6 cells by 5 partition walls (not shown) arranged in parallel on the short side of the side of the battery. A pair of positive electrode plate, negative electrode plate, and separator plate, and dilute sulfuric acid power Contains liquid (not shown). In FIG. 1, 3 is an inner lid mounted on the battery case 2, and 4 is an upper lid mounted on the recess of the inner lid 3. The battery case 2, the inner lid 3, and the upper lid 4 are all molded products made of polypropylene. The upper end of the side wall of the battery case 2 (not shown), the lower end of the side wall of the inner lid 3 (not shown), and the inner lid 3 The upper end of the partition wall provided in the recess and the lower end (not shown) of the partition wall of the upper lid 4 are heat-sealed and each is airtightly joined. In addition, 5 is a positive electrode terminal made of lead alloy, and 6 is a negative electrode terminal made of lead alloy.

 In FIG. 1, among the exhaust chambers provided in the inner lid 3, two concentrated exhaust chambers 41 are provided adjacent to the end exhaust chamber close to the short side of the battery. One hook 42 is provided in the center of each short side. By suspending the suspension band on the suspension hook 42, the battery can be transported in a suspended state, so that the transportation is easy.

 FIG. 2 is a view of the inner lid 3 as viewed from above. The recess 31 provided in the inner lid 3 is divided into an inner space and an outer space of the battery by partition walls (hatched portions), and further, the inner space of the battery is divided into six cells, which are the same as the number of cells, and each of them is exhausted. Chamber 37, 37 ', 37〃 (3 in the left half, left and right symmetrical, so the right half is omitted from the reference, and the related configuration is the same).

 [0022] There is a method of providing exhaust passages directly connected to each cell separately from the exhaust chamber as a structure for performing collective exhaust. A force-concentrated exhaust chamber 41 is arranged at the end of the battery to correspond to each cell. It is easier to structure the exhaust path space by moving the six exhaust chambers 37, 3, and 37〃 across the cross-section and guiding the exhaust gas to the central exhaust chamber 41 and exhausting it from the central exhaust chamber 41 to the outside of the battery. It is preferable because it can be small. In this system, it is necessary to connect the six compartments formed by the partition walls so that the exhaust gas can move across. However, in order to ensure that there is no difference in the amount of electrolyte between cells during use of the battery, the electrolyte that has condensed in the exhaust chambers 37, 37 ', 37〃 corresponding to each cell will partition the compartment. It is necessary to recirculate to the corresponding cell without transversal. Therefore, it is preferable to provide the exhaust chamber spacing walls 43, 44, and 45 as a barrier among the partition walls that prevent the electrolytic solution from crossing between the six sections.

[0023] As will be described later, the inner surface of the upper lid 4 is also provided with an exhaust chamber partition that divides the inner space of the battery into six chambers corresponding to the exhaust chamber spacing walls 43, 44, 45 of the inner lid 3. The exhaust chamber partition wall Notches are provided to allow gas to move across the six chambers. On the other hand, in the case of the inner lid 3, the exhaust chamber spacing walls 43, 44, 45 that divide the chamber into 6 are not provided with a notch, and the exhaust chamber spacing walls 43, 44, 45 are provided to allow the electrolyte to flow. It would be preferable to have a barrier to prevent the crossing of six sections.

 [0024] One exhaust chamber 37 of the exhaust chambers 37, 37 ', 37' 'will be described as an example. 35 is a cell communication chamber, and the cell communication chamber 35 and the cell are defined as exhaust chambers. Electrolyte reflux port 33 for refluxing the electrolyte condensed in 37 into the cell and gas exhaust port 34 for discharging the gas generated in the cell to cell communication chamber 35 are communicated with the cell. The cell communication small chamber 35 is separated from the exhaust chamber 37 by a partition wall, and communicates with the exhaust chamber 37 through a notch 36 provided in the partition wall, and other than the notch 36 is separated from the exhaust chamber 37 by the partition wall. .

 [0025] The air chamber 37 is divided into three air / J chambers 38, 39, and 40 by two partition walls 46 and 47. Each of the partition walls 46 and 47 has one notch (48 49), and the adjacent exhaust / J and chambers (38, 39, 40) communicate with each other through notches 48, 49 provided in the partition walls 46, 47. The floor of the exhaust chamber 37 is inclined along the short side of the inner lid 3 so that the floor surface of the exhaust chamber 37 becomes lower as the distance from the cell communication chamber 35 increases as the distance from the cell communication chamber 35 increases. Yes. The notches 48 and 49 provided in the partition walls 46 and 47 are arranged so that they do not overlap on a straight line parallel to the slope provided on the floor of the exhaust chamber 37 (in the zigzag position in the figure). The flow path of the gas passing through the chamber 37 is lengthened. As a result, the mist and vapor of the electrolyte mixed in the exhaust gas while passing through the exhaust chamber 37 are efficiently condensed and removed from the exhaust gas.

 The central exhaust chamber 41 is separated from an exhaust chamber 37 (exhaust small chamber 39 in the figure) by a partition wall 50, and three gas / J chambers 38, 39 are formed by a notch 51 provided in the partition wall 50. , 40 communicates with the exhaust chamber 40 located farthest from the cell communication chamber 35.

 [0027] Reference numeral 52 denotes a liquid injection chamber, which is provided with an opening 54 opened to a cell, and is surrounded by a partition wall 53 and an exhaust chamber 37 (in the figure, an exhaust small chamber 40). Reference numeral 55 denotes an alignment pin used when the upper lid 4 is attached to the concave portion 31 of the inner lid 3, which is fitted into a cylindrical hole described later provided in the upper lid 4. Reference numeral 56 denotes a bonding projection for strengthening the bonding with the upper lid 4.

[0028] 57, 58, 59 surrounded by a broken line in FIG. 2 are between the cells provided on the lower surface (cell side wall surface) of the inner lid 3. The partition wall 43 between the exhaust chamber 37 and the central exhaust chamber 41 adjacent to the exhaust chamber 37 is an opening (electrolyte reflux) provided in the exhaust chambers 37 and 3 and the floor wall 32 of the inner lid 3. Mouth 33 Position of cell spacing wall 57 arranged between two cells communicating with each other via gas discharge port 34) is shifted toward the center of the battery. If the position of the exhaust chamber spacing wall 43 coincides with the position of the cell spacing wall 57, the space volume of the exhaust chamber 37 becomes extremely small compared to the other exhaust chambers 3 and 37〃, and the exhaust chamber Insufficient condensation of electrolyte in 37 or electrolyte may leak out of battery inside exhaust chamber 37, resulting in inferior electrolyte recovery and leakage prevention functions There is a fear. On the other hand, according to this embodiment, the space volume of the exhaust chamber 37 adjacent to the central exhaust chamber 41 can be made equal to or smaller than the other exhaust chambers 3 and 37. Can be prevented. In the present embodiment, as the exhaust chamber spacing wall 43 is shifted toward the center of the battery, the exhaust chamber spacing wall 44 is also shifted toward the center of the battery as compared to the cell spacing wall 58. As described above, the space between the three exhaust chambers 37 37 ′ 37 can be made substantially equal by shifting the position of the partition wall 4344 between the exhaust chambers relative to the cell interval wall 5758.

[0029] FIG. 3 is a diagram showing the directional force of the inner lid 3 facing the cell. The hatched portions are the end face of the side wall 60 and the end face of the cell spacing wall 57 58 59 which are joined to the side wall of the battery case 2 and the open end face of the cell spacing wall by heat fusion. The battery is divided into six cells by five cell spacing walls. As described above, the floor wall 32 of the inner lid 3 is provided with an opening comprising the same number of electrolyte reflux ports 33 and gas discharge ports 34 as the number of cells, and the cells and the exhaust chamber communicate with each other through the openings. .

 [0030] Further, on the wall surface facing the cell of the floor wall 32 of the inner lid 3, a cylindrical body 62 that surrounds the electrolyte reflux port 33 and extends toward the cell, and a gas discharge port 34 are enclosed toward the cell. A cylindrical body 63 that extends is arranged.

[0031] FIG. 4 is a view of the upper lid 4 as viewed from the inner surface, and the exhaust chamber spacing wall 43 44 45 and the outer circumferential partition wall are positioned so as to overlap with the partition walls (exhaust chamber spacing wall and outer circumferential partition wall) provided on the upper surface of the inner lid 3. 65, and further, a cylindrical hole 66 fitted to the positioning pin 55 provided in the inner lid 3. The exhaust chamber spacing walls 43 44 45 that divide the battery space into six are each provided with a notch 67 to form a path to enable cross-sectional transition between exhaust gas forces S exhaust chambers. ing. In addition, a baffle plate 68 for suppressing the migration of the electrolyte is disposed at a position facing the notch 67. Furthermore, a notch 69 is provided in the partition wall that separates the electrolyte recirculation port 33 side and the gas exhaust port 34 side of the cell communication small chamber 35 to form a path for transferring to the gas power exhaust chamber 37 where the cell force is also discharged. The baffle plate 70 is disposed at a position facing the notch 69 to suppress the transition to the electrolyte solution S exhaust chamber 37 where the cell force is discharged by mixing with gas.

 [0032] When the upper lid 4 is mounted on the concave portion 31 of the inner lid 3, the partition wall of the inner lid 3 and the partition wall of the upper lid 4 are arranged at positions that exactly overlap, and the upper end of the partition wall of the inner lid 3 and the upper lid The lower ends of the four partition walls are joined by heat fusion. By joining the partition wall of the inner lid 3 and the partition wall of the upper lid 4 in this manner, the cell communication chamber 35 and the exhaust chamber 37, the adjacent exhaust chambers (38, 39, 40), the exhaust chamber 37 and the centralized exhaust chamber 41 are connected. Is isolated except for the notch provided in the partition wall.

 Further, as shown in FIGS. 2 and 4, the partition wall 53 surrounding the injection chamber 52 is not provided with a notch, and the injection chamber 52 is joined by joining the partition wall of the upper lid 4 and the partition wall of the inner lid 3. And the exhaust chamber 37, the injection chamber 52, and the space outside the battery are hermetically isolated.

 FIG. 5 is a diagram showing a state in which the upper lid 4 is attached to the concave portion 31 of the inner lid 3 and the partition provided in the concave portion 31 of the inner lid 3 and the partition provided on the inner surface of the upper lid 4 are joined. FIG. 5 is a cross-sectional view taken along line AA in FIGS. 2 and 4. FIG. The floor wall 32 of the recess 31 of the inner lid 3 is inclined so as to be lower as it is closer to the cell communication chamber 35 and higher as it is farther from the cell communication chamber 35. In addition, as shown in FIG. 2, partition walls 46 and 47 that divide exhaust chamber 37 into three exhaust small chambers 38, 39, and 40 are inclined with respect to the inclination of floor wall 32, and exhaust chamber spacing wall 43, 44, 45 and bulkhead 46, 47 angle Θ is an acute angle, and notches 48, 49 of bulkhead 46, 47 are placed at the lowest position on the inclined floor surface, so the battery is in a normal state. In the state of being placed horizontally, the electrolyte force condensed in the exhaust chamber 37 S moves to the electrolyte reflux port 33 side along the slope provided on the floor wall 32 of the exhaust chamber, and there is no risk of stagnation .

[0035] The internal space of the cell is hermetically sealed from the exhaust chamber 37, and further to the external space of the battery, except for the partition wall notch 36 provided to connect the cell communication small chamber 35 and the exhaust chamber 37. If the battery is accidentally turned over, the electrolyte overflows into the cell communication chamber 35 from the cell holder, fills the cell communication chamber 35, and the electrolyte surface is provided to allow the cell communication chamber 35 and the exhaust chamber 37 to communicate with each other. Partition wall notch leading to 36. As described above, the inner space of the cell is notched. Is isolated from the external space of the battery except for air, so that air cannot enter the cell when the notch 36 is blocked with the electrolyte, and the electrolyte that has reached the notch 36. Since the atmospheric pressure is applied to the surface, the electrolyte solution in the cell can be used either when the cell communication chamber 35 is turned over so that the cell communication chamber 35 is turned down or when the cell communication chamber 35 is turned over. Force S Can stop entering the exhaust chamber 37.

 [0036] In addition, when the cell communication chamber 35 is turned over so that the cell communication chamber 35 is on the lower side, the electrolytic solution condensed in the exhaust chamber 37 separates the exhaust chamber 37 into the exhaust chambers 38, 39, and 40. Since it moves to the cell communication small chamber 35 side through the cutouts 48 and 49 provided in, it is possible to prevent the electrolyte from entering the central exhaust chamber 41. On the other hand, even when the cell communication small chamber 35 is turned over so as to be on the upper side, as shown in FIGS. 2 and 4, at least two (two in this embodiment) partition walls 46 and 47 are provided in the exhaust chamber 37. Arrange each partition 46, 47 notches 48, 49 in zigzag with respect to the inclination of the floor surface of the exhaust chamber 37, and arrange so that they do not overlap in a straight line parallel to the inclination Therefore, even when the battery is rolled over, the partition walls do not overlap in the vertical direction, so that the electrolyte condensed in the exhaust chamber 38 close to the cell communication chamber 35 is prevented from passing through the intermediate exhaust chamber 39. be able to. In addition, the partition walls 46 and 47 that divide the exhaust chamber 37 are inclined, and the exhaust chamber space walls 43, 44, 45 and the angle Θ formed by the partition walls 46, 47 are made acute so that each exhaust chamber (38, 39, 40) forms a liquid storage space and prevents the electrolytic solution condensed in the exhaust chamber 37 from moving to the central exhaust chamber 41. In order to enlarge the liquid storage space, as shown in FIGS. 2 and 4, the ends of the partition walls 46 and 47 that contact the notches 48 and 49 are directed toward the cell communication chamber 35 (the floor wall 32 of the exhaust chamber 37). It is preferable to bend it with an urging force in a direction in which it is low.

 [0037] In addition, the central exhaust chamber 41 is positioned almost in the center of the short side of the upper lid 4, the central exhaust chamber 41 communicates with the exhaust chamber 40 farthest from the cell communication chamber 35, and the cell communication chamber 35 is on the lower side. In this state, the electrolytic solution condensed in the exhaust chamber 37 is transferred to the concentrated exhaust chamber 41 by positioning the cell communication chamber 35 on the upper side of the exhaust chamber 40. It is more preferable because it can be prevented.

[0038] Mist and vapor of the electrolyte mixed in the exhaust gas discharged from the cell condenser are condensed while passing through the exhaust chamber 37, and most of them are removed before reaching the central exhaust chamber 41. However, the exhaust gas reaching the central exhaust chamber 41 may contain a very small amount of electrolyte. The trace amount of electrolysis In order to remove the liquid, a porous body 71 made of polypropylene or ceramics is fitted as a filter inside the partition wall 50 of the upper lid 4 surrounding the central exhaust chamber 41 as shown in FIG. In order to exhaust smoothly without increasing the pressure in the exhaust chamber 37, it is preferable that the exhaust gas pass in the thickness direction of the filter 71. For this purpose, it is necessary to provide a space between the filter 71 and the inner wall surface of the upper lid 4. The filter 71 is difficult to position because it is fitted and locked to the cylindrical partition wall 50 of the concentrated exhaust chamber 41. However, by providing a convex portion 72 on the inner surface of the upper lid 4, the inner wall surface of the upper lid 4 and the filter 71 are arranged. An interval can be provided between the two. This method is a preferable method because it is simple and can secure a constant interval. The shape and quantity of the convex portion 72 are not particularly limited, but in order to make the distance between the filter 71 and the inner wall surface of the upper lid 4 parallel, it is provided on the inner peripheral portion of the concentrated exhaust chamber 41 on the inner wall surface of the upper lid 4. It is preferable to form an annular step or to arrange at least three convex portions 72 at equal intervals. With this configuration, the gas transferred to the central exhaust chamber 41 moves in the thickness direction in the filter 71, reaches the upper cover 4 side space of the central exhaust chamber 41, and is discharged outside through the exhaust passage 73. Is done.

 [0039] On the floor surface of the central exhaust chamber 41, the closer to the notch (51 in FIG. 2) provided in the partition wall 50 for communicating the central exhaust chamber 41 and the exhaust small chamber 40, the lower the distance from the notch 51 is. It is preferable to provide an inclination so as to be higher. In addition, it is preferable to provide an exhaust passage 73 for exhausting gas out of the battery at a position close to the notch 51. Cell force When the pressure in the exhaust chamber 37 is increased by the exhausted gas, when the gas moves from the exhaust chamber 37 to the central exhaust chamber 41 due to the gas pressure in the exhaust chamber 37, the gas flow is concentrated in the central exhaust chamber 41. It is easy to concentrate on the back part away from the entrance (corresponding to the cutout 51). Therefore, a small amount of electrolyte mist or vapor flow mixed in the gas without condensation in the exhaust chamber 37 is easily concentrated in the back of the central exhaust chamber 41. Condensation may cause filter 71 to become clogged. By arranging the gas exhaust passage 73 extending from the central exhaust chamber 41 to the outside of the battery, the exhaust gas can pass through the filter 71 evenly. .

[0040] In order to reduce the length of the exhaust path 73, the concentrated exhaust chamber 41 is preferably provided adjacent to the exhaust chamber 37 located at the end of the battery. In addition, as described above, the central exhaust chamber 41 includes A porous filter 71 is installed to prevent the electrolyte that could not condense in the exhaust chamber 37 from being discharged outside the battery. However, if there is only one central exhaust chamber 41, concentrated exhaust should be used. If the filter 71 in the chamber 41 becomes clogged, there is a risk of hindering exhaust. In order to avoid the soot, as shown in FIGS. 2 to 4, two centralized exhaust chambers 41 are provided on the left and right sides, and all exhaust chambers 37, 37 ' It is preferable to keep communication through the notch 67 provided in 43, 44, 45.

 [0041] When the partition walls of the inner lid 3 and the upper lid 4 are joined by heat fusion, the partition walls of the inner lid 3 and the upper lid 4 are pressed with the partition walls heated and softened, so that the partition walls may be deformed. is there. The filter 71 attached to the central exhaust chamber 41 of the upper lid 4 is fitted and locked in the cylindrical partition wall 50 for forming the central exhaust chamber provided on the inner surface of the upper lid 4. If the inner dimensions of the partition wall 50 change due to deformation of the filter 50, the filter 71 may come off. In order to prevent the occurrence of such problems, the mechanical strength of the bulkhead 50 of the upper lid 4 is made higher than that of the bulkhead 50 of the inner lid 3 so that deformation of the bulkhead 50 of the upper lid 4 is less likely to occur when both are joined. It is preferable. Specifically, it is preferable to make the thickness of the partition wall 50 of the upper lid 4 larger than the thickness of the partition wall 50 of the inner lid 3 as shown in FIG. The ratio of the thicknesses of the two is not particularly limited, but the thickness of the partition wall 50 of the upper lid 4 is preferably set to 1.5 to 3 times the thickness of the partition wall 50 of the inner lid 3. More preferably, the thickness of the partition wall 50 of the upper lid 4 is set to be large, and rib-shaped protrusions 74 are provided on the outer peripheral surface of the partition wall 50 of the upper lid 4 in the height direction of the partition wall. The shape, size, and quantity of the rib-like protrusions 74 are not particularly limited, but it is preferable that the rib-like protrusions 74 are arranged at equal intervals along the outer periphery of the partition wall 50 at least three places.

As shown in FIG. 2, the inner lid 3 is provided with a liquid injection port 54. By providing the injection port 54, it is possible to inject the liquid after the inner lid 3 is mounted on the battery case 2, and even if the battery is shaken or vibrated in the battery assembly process after the injection, the electrolyte solution There is no risk of overflow and handling is easy. After the injection, the upper lid 4 is attached to the recess 31 of the inner lid 3 and the partition walls of the inner lid 3 and the upper lid 4 are heat-sealed to form an airtight seal. By forming a liquid injection chamber 52 that is airtightly separated from the exhaust chamber 37, even if the battery is turned over, the electrolyte solution force in the cell leaks out of the exhaust chamber 37 and the battery through the liquid injection port 54. Can be prevented. FIG. 6 is a view showing the structure of the upper lid 4 side and the exhaust path 73 in the concentrated exhaust chamber 41. The gas that has also flowed downward in the central exhaust chamber 41 passes through the filter 71 fitted in the partition wall 57, moves to a space that contacts the inner surface of the upper cover 4, and passes through the exhaust path 73 to the outside of the battery. Is discharged. A space having a certain size is secured on the inner surface of the upper lid 4 by the convex portions 72 provided on the inner surface of the upper lid 4.

 FIG. 7 is a cross-sectional view of the inner lid 3 shown in FIG. 3 taken along line BB in the figure. For easy understanding, FIG. 7 shows the side wall 21 of the battery case 2, the opening end portions of the cell spacing walls 57 and 58, and a part of the upper lid 4. The end face of the partition wall provided on the wall surface facing the cell in the floor wall 32 of the inner lid 3 and the open end portions of the side wall 21 of the battery case 2 and the cell spacing walls 57 and 58 are hermetically joined by heat sealing. In addition, the partition wall provided in the recess on the upper surface of the floor wall 32 of the inner lid 3 and the partition wall provided on the inner surface (the lower surface in the figure) of the upper lid 4 are hermetically joined by heat-sealing. An exhaust chamber 37 surrounded by is formed. As described above, the gas generated by the cell cartridge passes through the gas discharge port 34 to the cell communication chamber 35, and the notch 6 7 provided in the exhaust chamber interval wall (43, 44, 45) of the upper lid 4 is provided. After passing through the exhaust chamber (37, 37 ', 37 "), it is led to a central exhaust chamber (not shown) communicating with the exhaust chamber 37 and discharged outside the battery through the central exhaust chamber. Gas evacuation chamber 37 The electrolyte mist and vapor mixed in the gas while moving inside the gas chamber are condensed to form a liquid, which is returned to the cell from the exhaust chamber 37 through the electrolyte reflux port 33. .

 [0045] As described above, on the floor wall 32 of the inner lid 3, the cylindrical body 62 that surrounds the electrolyte reflux port 33 and extends toward the cell, and the cylindrical body that surrounds the gas discharge port 34 and extends toward the cell. A body 63 is provided. The cylindrical bodies 62 and 63 are configured such that when the electrolyte surface in the cell undulates, the top of the wave (the wave front) or the splash of the electrolyte generated by the wave colliding with the wall surface of the battery case 2 causes the electrolyte reflux port 33 to And prevents gas from reaching the gas outlet 34.

[0046] In addition, by setting so that the lower ends 64 of the cylindrical bodies 62, 63 are immersed in the cell electrolyte (the bottom ends 64 of the cylindrical bodies 62, 63 are below the electrolyte surface), the electrolyte solution The surface is divided into small areas, and functions to suppress the electrolyte from reaching the electrolyte reflux port 33 and the gas discharge port 34 when the battery is tilted. Although the thickness and the cross-sectional shape of the cylindrical body 62 and the cylindrical body 63 are not particularly limited, the electrolyte does not reach the electrolyte reflux port 33 or the gas discharge port 34 when the battery is tilted. In order to achieve this, it is desirable to partition the electrolyte surface in as small an area as possible. For cylinders 62 and 63, the thickness is smaller, U is preferred.

In the present embodiment, it is preferable to provide a notch or a through hole on the wall surface of the cylindrical body 63 that surrounds the gas discharge port 34 and extends toward the cell. The size and position of the notch or the through hole are not particularly limited. However, in order to prevent the electrolyte from reaching the gas discharge port 34 when the electrolyte is undulated as described above, the smaller one is not preferable. preferable. However, in order for the cell force to smoothly discharge the gas, it is desirable that the upper end of the notch be above the electrolyte surface even when the electrolyte in the cell undulates or the battery tilts. Furthermore, it is preferable that the cylindrical body 63 be sized so that when the tubular body 63 is wetted with the electrolytic solution, the electrolytic solution forms a liquid film and does not block the notches or the through holes. In order to satisfy such a condition, it is preferable that the notches and through holes provided in the cylindrical body 63 have a vertically long shape. As a result, the upper end of the notch or the through hole is set on the electrolyte surface, and it is made as thin as possible to prevent the electrolyte from reaching the gas outlet 34 when the electrolyte undulates. It is possible to prevent the notch and the through-hole from being blocked by the electrolyte liquid film.

 FIG. 8 is a cross-sectional view of the portion indicated by line CC in FIG. As described above, a through hole 75 is provided in the wall surface of the cylindrical body 63 if it is a vertically long cutout.

 In the present embodiment, as described above, the through hole 75 is provided in the wall surface of the cylindrical body 63 that surrounds the gas discharge port 34 and extends toward the cell, so that the electrolytic solution is provided in comparison with the electrolytic solution reflux port 33. It is easy for electrolyte droplets to reach the gas outlet 34 when the surface is wavy. Electrolyte droplets that reach the gas outlet 34 may form a liquid film at the gas outlet 34 and block it. If the gas distribution outlet is clogged with a liquid film, and condensed electrolyte accumulates on it, there is a risk of hindering gas from being discharged from the cell through the gas outlet 34. In order to prevent the formation of a liquid film, it is preferable that the shape of the gas outlet 34 is not a circle or a square but an elongated oval or a rectangle as shown in FIG.

[0050] In addition, a liquid film is formed at the gas outlet 34 and the gas outlet 34 is blocked, or foreign substances floating on the electrolyte surface at the gas outlet 34 (sponge-like lead that has fallen off the electrode plate). In order to avoid harmful effects, place the local floor wall 3 2 'including the gas outlet 34 at a higher position than the floor wall 32 of the inner lid 3 as shown in Figs. 7 and 8. It is more preferable to increase the distance between the gas outlet 34 and the electrolyte surface. [0051] In addition, a partition was provided so as to surround the local floor wall 32 ^ provided with the gas discharge port 34 provided in the floor wall 32 of the inner lid 3, and the cell communication small chamber 35 was partitioned, and dew condensation occurred in the exhaust chamber 37. The electrolyte is prevented from entering the cell communication chamber 35 and at the same time, the gas from which the cell force has been exhausted passes through the notch 67 provided in the exhaust chamber spacing wall (43, 44, 45) of the top cover 4 and the exhaust chamber (37, 37 ′, 3 37 ”).

 [0052] The description of the configuration of the present embodiment is as described above. As described above, the concave portion 31 of the inner lid 3 is provided with the pin-shaped convex portions 55 for alignment with the upper lid 4, and the upper lid 4 A cylindrical hole 66 for fitting with the pin-like convex portion 55 is provided on the inner surface. By aligning the inner lid 3 with the pin-shaped convex part 55, the inner lid 3 is attached to the battery case 2, and the outer surface of the inner lid 3 is washed by washing the outer surface of the battery case 2 after injecting the electrolyte. Even if the water gets wet with cleaning water, there is an advantage that there is no possibility of water remaining in the fitting part or stagnation of foreign matter.

 [0053] In order to support the battery stably (so that the battery does not tilt), it is preferable to provide the suspension hook 42 at the center of both short sides of the side of the battery. Also, even if the battery is tilted, in order to minimize the influence of the tilt of the electrolyte surface relative to the wall surface of the battery case 2, the cell spacing wall 57 is parallel to the short side (11 in FIG. 2) of the side of the battery. 58, 59 are preferably arranged. However, when the suspension hook 42 is provided on the short side 11 of the inner lid 3, the space volume of the exhaust chamber 37 adjacent to the short side 11 provided with the suspension hook 42 is extremely reduced. According to the present embodiment, as shown in FIG. 2, the cell spacing walls 57, 58, 59 are arranged in parallel to the short side 11 of the side of the battery, and are suspended at the center of the short side 11 of the inner lid 3. Even if the battery has the support hook 42, the suspension hook 42 is provided by arranging the exhaust chamber spacing walls 43, 44, 45 regardless of the positions of the cell spacing walls 57, 58, 59. The space volume of the exhaust chamber 37 adjacent to the side can be the exhaust chamber 37 having a size comparable to the other exhaust chambers 37 'and 37 "(located on the center side of the battery).

 [0054] Although the details of the present invention have been described above with reference to one embodiment, the present invention is not limited to the above-described embodiment. In the present invention, for example, the position of the central exhaust chamber 41 is not particularly limited. Regardless of the position of the cell spacing walls 57, 58, 59, between the exhaust chambers that define the exhaust chamber 37 adjacent to the central exhaust chamber 41. By setting the position of the partition wall 43, the object of the present application can be achieved.

Claims

The scope of the claims  [1] A battery case (2) that houses a plurality of cells, an inner lid (3) that covers the upper surface of the battery case (2), and an upper lid (4) that covers the recess (31) of the inner lid (3) The space is surrounded by exhaust chamber spacing walls (43, 44, 45) to provide the same number of exhaust chambers (37, 3, 37mm) as the number of cells, and adjacent exhaust chambers ( 37, 37 ', 37 ") communicate with each other through a notch or a through hole (67) provided in the exhaust chamber spacing wall (43, 44, 45), and the exhaust chamber (37, 37 ^, 37") And the cell communicate with each other through an opening formed by an electrolyte reflux port (33) and a gas discharge port (34) provided in the floor wall (32) of the inner lid (3), and the exhaust chamber (37, 37 ', 37 ") and a centralized exhaust chamber (41) communicating with the exhaust chamber (37, 37', 37") after the gas generated from the cell is introduced to the central exhaust chamber (41). Lead acid battery with a mechanism for exhausting the battery to the outside via  A partition wall surrounding an opening formed by the electrolyte solution reflux port (33) and the gas discharge port (34) is arranged, and the cell communication is defined by the partition wall from the exhaust chamber (37, 37 ', 37 "). A small chamber (35) is provided, and the cell communication chamber (35) is communicated with the exhaust chamber (37, 37 ', 37 ") through a notch (36) provided in the partition wall, except for the notch (36). Is a lead-acid battery characterized in that the cell communication chamber (35) and the exhaust chamber (37) are separated by a partition wall.  [2] Floor wall (32) force of the exhaust chamber (37, 37 ', 37 ") Communication with the cell communication chamber (35) decreases as the distance from the communication section with the cell communication chamber (35) decreases. The exhaust chamber (37, 37 ', 37 ") is provided with an inclination so as to increase as the distance of the component increases, and the exhaust chamber (37, 37', 37") includes at least two exhaust chambers (46, 47). 38, 39, 40), the partition wall (46, 47) is provided with at least one notch (48, 49), and the adjacent exhaust chambers (38, 39, 40) are The notches (48, 49) are communicated by the notches (48, 49) provided in the partition walls (46, 47), and the portions other than the notches (48, 49) are isolated by the partition walls (46, 47) and are connected to the adjacent partition walls (46, 47). The lead storage battery according to claim 1, wherein the cutouts (48, 49) provided are arranged in a zigzag position with respect to the inclination of the floor wall (32). [3] The partition walls (46, 47) dividing the exhaust chamber (37, 37 ', 37 ") into the exhaust small chambers (38, 39, 40) are inclined with respect to the inclination of the floor surface, The angle Θ formed by the partition walls (46, 47) and the exhaust chamber spacing walls (43, 44, 45) is an acute angle, and the partition wall (46, 47) is at the lowest position of the floor wall (32). The lead storage battery according to claim 2, wherein the notches (48, 49) are provided. pond.  [4] Of the plurality of exhaust chambers (37, 37 ′, 37 ″), the concentrated exhaust chamber (41) is located at a position adjacent to at least one exhaust chamber of the exhaust chamber (37) positioned at both ends of the battery. The exhaust chamber (37) and the central exhaust chamber (41) are partitioned by a partition wall (50), and the cell communication is made by a notch or a through hole (51) provided in the partition wall (50). The small chamber (35) communicates with the exhaust chamber (40) farthest away from the central exhaust chamber (41), and the exhaust chamber (37) and central exhaust chamber ( 41. The lead acid battery according to claim 2, wherein 41) is isolated.  [5] The central exhaust chamber (41) contains a porous filter (71), and is divided into two upper and lower spaces on the upper lid (4) side and the inner lid (3) side by the porous filter (71). The space on the upper lid (4) side communicates with the outside of the battery via the exhaust passage (73), and the floor surface of the central exhaust chamber (41) is connected to the exhaust chamber (37). It has an inclination so as to increase with increasing force, and the exhaust passage (73) is arranged close to the communicating portion between the central exhaust chamber (41) and the exhaust chamber (37). Item 2. The lead acid battery according to item 1.  [6] Concentrated exhaust chamber partitioning cylinder in which a convex portion (72) is provided on the inner surface of the upper lid (4) forming the central exhaust chamber (41), and the porous filter (71) is provided on the upper lid (4). The lead-acid battery according to claim 5, wherein the space on the side of the upper lid (4) is formed by being fitted to a cylindrical partition wall (50).  [7] The floor wall (32) of the inner lid (3) is provided with a liquid injection opening (54) opened in each cell of the same number as the number of cells, and a partition wall (53 ) And an upper lid (4), the liquid injection chamber (52) is partitioned, and the liquid injection chamber (52), the exhaust chamber (37) and the outside of the battery are hermetically sealed. Lead acid battery of description. [8] The inner lid (3) and the upper lid (4) are made of a thermoplastic resin molded article, and an outer peripheral side wall (65) is formed on both the upper surface of the inner lid (3) and the inner surface of the upper lid (4). A partition wall (43, 44, 45), a partition wall of the cell communication chamber (35), a partition wall (50) of the central exhaust chamber (41), and a partition wall divided into the exhaust chamber (38, 39, 40) ( 46, 47), and the outer peripheral side wall (65) provided on the inner lid (3) and upper lid (4) is heat-sealed to isolate the inside and outside of the battery, and the inner lid (3) and upper lid are separated. By connecting the exhaust chamber spacing walls (43, 44, 45) provided on the lid (4) to each other, the same number of exhaust chambers (37, 37 ', 37 ") as the number of cells are formed. The lead-acid battery according to claim 1, wherein an exhaust chamber (38, 39, 40) and a central exhaust chamber (41) are formed. [9] Of the partition walls (50) that separate the central exhaust chamber (41) and the exhaust chamber (37), the thickness of the partition wall (50) provided on the inner surface of the upper cover (4) is set on the upper surface of the inner cover (3). The lead-acid battery according to claim 8, wherein the lead-acid battery is larger than the thickness of the partition wall (50) provided.  [10] The rib-like projection (74) extending in the height direction of the partition wall (50) is provided on the outer surface of the partition wall (50) provided on the inner surface of the upper lid (4). 9. The lead acid battery according to 9.  [11] The inner lid (3) is provided with a positioning pin (55) for overlapping with the upper lid (4), and the upper lid (4) has a cylindrical shape for fitting with the positioning pin (55). 9. The lead acid battery according to claim 8, wherein a hole (66) is provided.  [12] A battery case (2) for storing a plurality of cells, an inner lid (3) that covers the upper surface of the battery case (2), and an upper lid (4) that covers the recess (31) of the inner lid (3) The same number of exhaust chambers (37, 3, 37 g) as the cells partitioned by the exhaust chamber spacing walls (43, 44, 45) and the exhaust chambers (37, 3, 37 ") communicate with the enclosed space. Electrolyte reflux comprising at least one central exhaust chamber (41) and communicating the cell and the exhaust chamber (37, 37 ', 37 ") to the floor wall (32) of the exhaust chamber (37, 3, 37") A gas exhaust port (34) and a gas exhaust port (34) are provided, and the gas generated by the cell heater is exhausted to the outside of the battery via the exhaust chamber (37, 37 ', 37 ") and the central exhaust chamber (41). Lead storage battery with a mechanism to  A cylindrical body (62) and a gas extending in the cell by enclosing the electrolyte return port (33) on the wall surface of the exhaust wall (37, 3, 37 ") facing the cell of the floor wall (32). A cylindrical body (63) is provided that surrounds the discharge port (34) and extends into the cell, and cuts into the wall of the cylindrical body (63) that extends around the gas discharge port (34) and extends into the cell. A lead-acid battery characterized by having a notch or through-hole (75).  13. The lead acid battery according to claim 12, wherein the gas discharge port (34) is an oval or rectangular opening.  [14] Of the floor wall (32) of the exhaust chamber (37, 37 ', 37 "), the local floor wall (32 ^) provided with the gas outlet (34) is compared with the surrounding floor wall. 13. The lead-acid battery according to claim 12, wherein the lead-acid battery is disposed at a position far from the electrolyte surface force of the cell. [15] A battery case (2) that houses a plurality of cells separated from each other by equally spaced cell spacing walls (57, 58, 59), and an inner lid that covers the upper surface of the battery case (2) ( 3) and the recess (3) of the inner lid (3) 31), and the inner lid (3) includes the cell spacing walls (57, 58, 59) on the wall surface facing the cell, and the middle lid (3) on the wall surface facing the upper lid (4). Equipped with an exhaust chamber spacing wall (43, 44, 45) that divides the space enclosed by the recess (31) of the lid (3) and the upper lid (4) into as many exhaust chambers (37, 3, 37 ") as the cells Adjacent exhaust chambers (37, 37 ', 37mm) communicate with each other through a notch or a through hole (67) provided in the exhaust chamber spacing wall (43, 44, 45). 37 ', 37 ") and the cell communicate with each other through the openings (33, 34) provided in the floor wall (32) of the inner lid (3), and the exhaust chamber (37, 37 ^, 37") A central exhaust chamber (41) communicating with the exhaust chamber (37) is provided adjacent to at least one exhaust chamber (37), and the gas generated by the cell force is supplied to the exhaust chamber (37, 37 ^, 37 "). To lead-acid batteries equipped with a mechanism for exhausting the batteries all at once via the central exhaust chamber (41), ,  At least part or all of the exhaust chamber interval wall (43) that partitions the exhaust chamber (37) adjacent to the central exhaust chamber (41) and the exhaust chamber (37 ') adjacent to the exhaust chamber (37) A lead-acid battery characterized in that its position is shifted relative to a cell spacing wall (57) that partitions two cells communicating with two exhaust chambers (37, 3 T) and openings (33, 34).  [16] The central exhaust chamber (41) is disposed adjacent to the exhaust chamber (37) located at the end of the battery, and a part or all of the exhaust chamber spacing wall (43) is disposed on the cell spacing wall (57). 16. The lead acid battery according to claim 15, wherein the lead acid battery is shifted to the center side of the battery.  [17] Cell spacing walls (57, 58, 59) are provided in parallel with the short side (11) of the side of the battery, and the concentrated exhaust chamber (41) is positioned at the end of both short sides (11). The lead storage battery according to claim 16, wherein the lead storage battery is provided adjacent to the exhaust chamber (37).  [18] A suspension hook (42) is provided at the center of both short sides of the inner lid (3) to partition an exhaust chamber (37) adjacent to the short side and an adjacent exhaust chamber (37 '). Cell spacing wall (57) that partitions part or all of the exhaust chamber spacing wall (43) into two cells communicating with the two exhaust chambers (37, 37 ') through the openings (33, 34) 16. The lead acid battery according to claim 15, wherein the position is shifted as compared with that of the lead acid battery.