CN100576606C - lead battery - Google Patents

Abstract

The invention provides a kind of employing lead accumulator of exhaust mode in the lump, the anti-effusion function excellence of the discharge function of its gas, electrolyte, even and battery when rollover electrolyte can not spill yet.Have in the lead accumulator of exhaust gear in the lump, the next door of the opening that is made of electrolyte refluxing opening (33) and gas discharge outlet (34) is surrounded in configuration, have by this next door and exhaust chamber (37,37 ', the element cell that separates of 37 ") is communicated with cell (35); by the breach (36) that is provided with on the next door make this element cell be communicated with cell (35) and exhaust chamber (37,37 ', 37 ") are communicated with, this breach (36) pass through in addition next door isolated location battery connection cell (35) and exhaust chamber (37,37 ', 37 ").

Description

lead battery

technical field

The present invention relates to a lead storage battery having an exhaust structure for exhausting gas while preventing electrolyte solution from escaping.

Background technique

The exhaust structure of an integral lead-acid storage battery with multiple cells is roughly divided into a separate exhaust method and a collective exhaust method. The separate exhaust method is to install an exhaust plug on each unit cell and arrange them side by side. In the gas method, the gas exhausted from each unit cell is temporarily introduced into an exhaust chamber, and the gas is collected and discharged to the outside from the exhaust chamber. Compared with the separate exhaust method, the collective exhaust method has the advantages of fewer parts, the volume of the upper space of the plate can be reduced without reducing the battery capacity, the battery can be miniaturized, and the amount of electrolyte escape can be reduced. , so it is widely used in lead-acid batteries for vehicles.

Conventionally, several proposals have been made regarding the collective exhausting of lead-acid batteries to prevent the electrolyte solution from escaping to the outside of the battery in the form of mist or vapor, and to discharge the gas smoothly without increasing the internal pressure of the battery. For example, a structure has been proposed in which a gas containing mist or vapor of an electrolytic solution is flowed in a horizontal direction in an exhaust chamber, during which the mist or vapor of an electrolytic solution is condensed to separate the gas and electrolytic solution, and the gas is discharged to the outside, and the The condensed electrolyte solution flows back into the unit cell (see Patent Document 1 and Patent Document 2).

Patent Document 1: Specification of US Patent No. 4486516

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

In addition, in order to improve the separation efficiency of gas and electrolytic solution, a collective exhaust structure is proposed in which the distance of gas flowing in the horizontal direction is extended as much as possible (refer to Patent Document 3).

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

In addition, the following exhaust structure has also been proposed: a porous filter is arranged at the gas outlet from the exhaust chamber to the outside of the battery to prevent the mist or vapor of the electrolyte from being discharged, and at the same time, a space is provided on the lower side of the filter to prevent filtration. The device is wetted by the electrolyte and clogged (refer to Patent Document 4).

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

In lead-acid batteries for vehicles, the electrolyte level fluctuates when the vehicle vibrates, and the electrolyte level inclines when the vehicle goes uphill. In the methods proposed in the above patent documents 1 to 3, when the electrolyte level fluctuates and tilts, the electrolyte passes through the gas discharge port connecting the unit cells and the exhaust chamber, and the electrolyte in the unit cells may fly out into the exhaust chamber. . In addition, when the battery is turned over by mistake, the electrolyte solution may overflow from the vent chamber to the outside of the battery. In addition, space cannot be secured on the upper cover side of the concentrated exhaust chamber, and the gas discharge function may be impaired, or the filter may fall to the bottom surface of the concentrated exhaust chamber and fail to function as a filter.

Contents of the invention

Therefore, in view of the disadvantages of the conventional lead-acid storage battery adopting the method of collectively exhausting, the first object of the present invention is to provide a lead-acid storage battery which is excellent in gas discharge function and electrolyte escape prevention function, and which can be used even when the battery is overturned. Electrolyte will not leak out either.

In addition, there is also a method of providing an exhaust passage directly connected to each unit cell in addition to the exhaust chamber for realizing the collective exhaust. At least any of the exhaust chambers arranged adjacent to the number of unit cells is the same A centralized exhaust chamber is set in one exhaust chamber, so that the exhaust gas moves laterally between the exhaust chambers. After being introduced into the centralized exhaust chamber, it is exhausted to the outside of the battery through the centralized exhaust chamber. This method is due to the simple structure and the exhaust channel The diameter space is small so it is preferable. In the conventional battery of the collective exhaust method, the positions of the cell partition walls (directly above the cell partition walls) arranged at equal intervals in the battery case and the lower surface of the middle cover (the side facing the cells) are arranged. An exhaust chamber partition for forming the same number of exhaust chambers as the number of unit cells. In this existing exhaust structure, the volume of the exhaust chamber adjacent to the concentrated exhaust chamber becomes smaller, and the condensation of the electrolyte cannot be sufficiently performed during the process of gas passing through the exhaust chamber, and the electrolyte may leak out when the battery is tilted. In addition, when hooks for suspension and support are provided on the side of the middle cover, the volume of the exhaust chambers located at both ends of the battery becomes smaller, which has the same disadvantages as the centralized exhaust chamber and adjacent exhaust chambers.

Therefore, the second object of the present invention is to provide a lead-acid battery that has excellent gas discharge function and electrolyte recovery function, and that the electrolyte solution does not change even when the battery is tilted. It will leak and has excellent leak-proof function.

In this invention, the said 1st objective is achieved by making the exhaust structure of a lead acid battery into the following structure.

(1) The lead storage battery of the present invention has a mechanism for discharging air to the outside of the battery. The space surrounded by the upper cover 4 of the recess 31 of 3 is divided by the exhaust chamber partition wall 43, 44, 45 to set the same number of exhaust chambers 37, 37', 37" as the number of the unit cells, Adjacent exhaust chambers 37, 37', 37" communicate with each other through the gaps or through holes 67 provided on the exhaust chamber partition walls 43, 44, 45, and the exhaust chambers 37, 37', 37" and The unit cell communicates through the opening formed by the electrolyte return port 33 and the gas discharge port 34 provided on the bottom wall 32 of the middle cover 3, and has a centralized exhaust chamber 41 communicated with the exhaust chambers 37, 37', 37". After the gas generated from the unit cells is introduced into the exhaust chambers 37, 37', 37", and exhausted to the outside of the battery through the centralized exhaust chamber 41, it is characterized in that it is surrounded by the The partition wall of the opening formed by the electrolyte return port 33 and the gas discharge port 34 has a unit cell communication chamber 35 separated from the exhaust chamber 37, 37', 37" by the partition wall, and passes through the gap 36 provided on the partition wall. The unit cell communication chamber 35 is communicated with the exhaust chamber 37, 37', 37", and the unit cell communication chamber 35 and the exhaust chamber 37 are separated by a partition wall outside the gap 36.

(2) The lead-acid storage battery of the present invention, according to the accumulator described in (1), is characterized in that, the bottom wall 32 of described exhaust chamber 37, 37 ', 37 " has inclination, is communicated with unit cell 35 communication chambers. The closer the distance to the communication part of the unit cell, the lower the distance, and the farther the distance to the communication part communicating with the unit cell communication chamber 35, the higher the distance. Divided into more than three exhaust chambers 38, 39, 40, the partition wall 46, 47 has at least one gap 48, 49, and the adjacent exhaust chambers 38, 39, 40 pass through each other and are set on the partition wall 46, 47 The gaps 48, 49 communicate with each other, and the gaps 48, 49 are separated by the partition walls 46, 47. The gaps 48, 49 provided on the adjacent partition walls 46, 47 are arranged in a zigzag shape relative to the inclination of the bottom wall 32. s position.

(3) The lead storage battery of the present invention is the storage battery according to the above (2), characterized in that the partition walls 46, 47 is oblique to the inclination of the bottom surface, the angle θ formed by the partition walls 46, 47 and the partition walls 43, 44, 45 of the exhaust chamber is an acute angle, and the lowest position of the bottom wall 32 among the partition walls 46, 47 is set The aforementioned gaps 48,49.

(4) The lead-acid storage battery of the present invention is the storage battery according to the above (2), characterized in that, among the plurality of exhaust chambers 37, 37', 37", the exhaust gas located at both ends of the battery Concentrated exhaust chamber 41 is configured on the position adjacent to at least one exhaust chamber of chamber 37, and described exhaust chamber 37 and concentrated exhaust chamber 41 are separated by partition wall 50, and the breach or through-hole 51 that is provided with on this partition wall 50 , make the exhaust chamber 40 farthest from the communication chamber 35 of the unit cells communicate with the concentrated exhaust chamber 41 , and separate the exhaust chamber 37 and the concentrated exhaust chamber 41 by a partition 50 other than the gap or through hole 51 .

(5) The lead storage battery of the present invention, according to the storage battery described in the above (1), is characterized in that, the built-in porous filter 71 of the said centralized exhaust chamber 41 is separated into an upper cover 4 by the porous filter 71. side and the upper and lower spaces on the side of the middle cover 3, the space on the side of the upper cover 4 communicates with the outside of the battery through the exhaust passage 73, the bottom surface of the concentrated exhaust chamber 41 has an inclination, the farther away from the communication with the exhaust chamber 37 The higher the portion is, the exhaust passage 73 is arranged at a position close to the communication portion between the centralized exhaust chamber 41 and the exhaust chamber 37 .

(6) The lead-acid storage battery of the present invention is the storage battery according to the above-mentioned (5), wherein a convex portion 72 is provided on the inner surface of the upper cover 4 forming the concentrated exhaust chamber 41, and the porous filter 71 is fitted and installed on the centralized exhaust chamber partition cylindrical partition 50 provided on the upper cover 4 to form a space on the upper cover 4 side.

(7) The lead-acid storage battery of the present invention, according to the storage battery described in the above (1), is characterized in that, on the bottom wall 32 of the said middle cover 3, the same number as the number of unit cells is provided with the same number of openings to each unit cell. The opening 54 for liquid is separated from the liquid injection chamber 52 by the partition wall 53 surrounding the opening 54 for liquid injection and the upper cover 4, so that the liquid injection chamber 52 is hermetically sealed from the exhaust chamber 37 and the outside of the battery.

(8) The lead storage battery of the present invention, according to the storage battery described in the above (1), is characterized in that the middle cover 3 and the upper cover 4 are made of thermoplastic resin moldings, and the upper surface of the middle cover 3 and the upper cover Both sides of the inner surface of 4 are provided with the outer peripheral side wall 65, the partition wall 43, 44, 45 of the exhaust chamber, the partition wall of the unit cell communication chamber 35, the partition wall 50 of the concentrated exhaust chamber 41, and the partition walls divided into the rows. The partition walls 46, 47 of the air cells 38, 39, 40 are bonded to each other by hot-melting the outer peripheral side walls 65 provided on the middle cover 3 and the upper cover 4 to isolate the inside and outside of the battery, and are bonded to the middle cover by hot-melting. 3 and the exhaust chamber partition walls 43, 44, 45 arranged on the upper cover 4 form exhaust chambers 37, 37', 37 "the same number as the number of unit cells, and form the unit cell communication chamber 35 and the exhaust chamber. 38, 39, 40, centralized exhaust chamber 41.

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

(10) The lead-acid storage battery of the present invention, according to the storage battery described in the above (9), is characterized in that, on the outer surface of the partition wall 50 provided on the inner surface of the above-mentioned upper cover 4, a wall extending along the height direction of the partition wall 50 is provided. Rib-like protrusions 74 .

(11) The lead storage battery of the present invention, according to the storage battery described in the above (8), is characterized in that the alignment pin 55 when overlapping with the upper cover 4 is provided on the middle cover 3 , and the upper cover 4 A cylindrical hole 66 for fitting with the alignment pin 55 is provided.

In the present invention, the first object is also achieved by making the exhaust structure of the lead storage battery into the following structure.

(12) The lead-acid storage battery of the present invention has a mechanism for discharging air to the outside of the battery. The space surrounded by the upper cover 4 of the recess 31 of 3 has the same number of exhaust chambers 37, 37', 37" as the unit cells divided by the exhaust chamber partition walls 43, 44, 45 and the exhaust At least one centralized exhaust chamber 41 communicated with the chambers 37, 37 ′, 37 ″, on the bottom wall 32 of the exhaust chambers 37, 37 ′, 37 ″, there is an exhaust chamber 37, 37 ′, 37 connecting the unit cells and the exhaust chambers 37, 37 ′, 37 ″. The electrolyte return port 33 and the gas discharge port 34 of ", exhaust the gas generated from the unit cells to the outside of the battery through the exhaust chambers 37, 37', 37" and the concentrated exhaust chamber 41, which It is characterized in that, on the wall surface of the bottom wall 32 of the exhaust chamber 37, 37', 37" facing the unit cell, a cylindrical body 62 surrounding the electrolyte return port 33 and extending into the unit cell and surrounding The cylindrical body 63 extending inward from the gas discharge port 34 is provided with a notch or through hole 75 on the wall surface of the cylindrical body 63 surrounding the gas discharge port 34 and extending inward from the unit cell.

(13) The lead acid storage battery of the present invention is the storage battery according to the above (12), wherein the gas discharge port 34 is an oval or rectangular opening.

(14) The lead storage battery of the present invention is the storage battery according to the above (12), wherein the gas discharge port is provided in the bottom wall 32 of the exhaust chamber 37, 37', 37". The partial bottom wall 32' of 34 is arranged at a position farther from the electrolyte level of the unit cell than the surrounding bottom wall.

In this invention, the said 2nd objective is achieved by making the exhaust structure of a lead acid battery into the following structure.

(15) The lead-acid storage battery of the present invention has a mechanism for collectively exhausting to the outside of the battery, and the mechanism has a storage battery case 2 for accommodating a plurality of unit cells separated from each other by unit cell partition walls 57, 58, 59 arranged at equal intervals , the middle cover 3 covering the upper surface of the battery case 2 and the upper cover 4 covering the recess 31 of the middle cover 3, the middle cover 3 has the unit cell partition walls 57, 58, 59 on the wall facing the unit cells , on the wall facing the upper cover 4, the space surrounded by the recess 31 of the middle cover 3 and the upper cover 4 is divided into exhaust chambers 37, 37', 37 "the same number as the unit cells. The chamber partition walls 43, 44, 45 make the adjacent exhaust chambers 37, 37', 37" communicate with each other through the gaps or through holes 67 provided on the exhaust chamber partition walls 43, 44, 45, and exhaust The chambers 37, 37', 37" communicate with the unit cells through the openings 33, 34 provided on the bottom wall 32 of the middle cover 3, and at least one of the exhaust chambers 37, 37', 37" is connected to the exhaust chamber. 37 is adjacent to and communicated with the exhaust chamber 37, the gas generated from the unit cells is introduced into the exhaust chambers 37, 37', 37", and then passed through the centralized exhaust chamber 41 to The battery external exhaust is characterized in that at least the exhaust chamber partition wall 43 that separates the exhaust chamber 37 adjacent to the centralized exhaust chamber 41 from the exhaust chamber 37' adjacent to the exhaust chamber 37 Some or all of the unit cell partition walls 5 that separate the two unit cells communicated with the two exhaust chambers 37 , 37 ′ through the openings 33 , 34 are shifted in position.

(16) The lead storage battery of the present invention is the storage battery according to the above (15), wherein the centralized exhaust chamber 41 is arranged adjacent to the exhaust chamber 37 at the end of the battery, and the space between the exhaust chambers is Part or all of the partition wall 43 is shifted toward the battery center side from the unit cell partition wall 57 .

(17) The lead storage battery of the present invention, according to the storage battery described in (16), is characterized in that, among the sides of the battery, unit cell partition walls 57, 58, 59 are arranged parallel to the short side 11, and are located at the two short sides. The exhaust chamber 37 at the end portion on the side 11 side is provided adjacent to the centralized exhaust chamber 41 .

(18) The lead storage battery of the present invention, according to the storage battery described in (15), is characterized in that a hook 42 for suspension support is provided at the center of the two short sides of the middle cover 3, so that the exhaust chamber partition wall 43 A part or all of it is shifted from the unit cell partition wall 57, and the exhaust chamber partition wall 43 separates the exhaust chamber 37 adjacent to the short side from the adjacent exhaust chamber 37', and the unit cell partition wall 57 separates the two unit cells communicating with the two exhaust chambers 37, 37' through the openings 33, 34.

According to the battery of the present invention described in the above (1), even if the battery is turned overside, the possibility of leakage of the electrolytic solution can be made into a lead-acid storage battery of a collective exhaust system.

According to the battery of the present invention described in the above (2) and (4), it is possible to provide a lead acid storage battery excellent in the separation function of the exhaust gas and the mist and vapor of the electrolytic solution contained therein. In addition, even when the battery is overturned, it is possible to provide a lead acid storage battery of a collective exhaust method that is less likely to leak the electrolyte solution.

According to the battery of the present invention described in (3) above, it is possible to provide a lead-acid battery in which the electrolytic solution condensed in the exhaust chamber smoothly reflows.

According to the battery of the present invention described in (5) above, it is possible to suppress the obstruction of gas discharge due to clogging of the filter.

According to the battery of the present invention described in (6) above, the space between the filter arranged in the centralized exhaust chamber and the inner surface of the upper cover can be reliably ensured.

According to the battery of the present invention described in the above (7) and (8), the electrolyte can be injected after the middle cover is attached, and the lead acid battery will not leak the electrolyte even when the battery is turned over.

According to the battery of the present invention described in (9) and (10), it is possible to prevent the filter from coming off due to the deformation of the partition wall where the filter is fitted and mounted when the upper end is thermally bonded to the middle cover.

According to the battery of the present invention described in (11) above, the upper cover can be attached to the middle cover without dislocation, and it is possible to prevent water and foreign matter from biting into the fitting portion for alignment.

According to the battery of the present invention described in the above (12) and (14), even if the electrolyte level in the unit cell fluctuates, or when the battery is tilted, the possibility of electrolyte leakage is also small. storage battery.

According to the battery of the present invention described in (13) and (14) above, it is possible to provide a lead acid storage battery in which the gas outlet is less likely to be clogged by electrolyte or foreign matter and gas can be smoothly moved from the unit cell to the exhaust chamber.

According to the battery of the present invention described in the above (15), even if the concentrated exhaust chamber is provided adjacent to any one of the exhaust chambers formed by the partition wall which is the same number as the number of unit cells, the centralized exhaust The exhaust chamber adjacent to the gas chamber can form a sufficiently large exhaust chamber required for the condensation of mist and vapor of the electrolytic solution mixed in the exhaust gas when the gas flows through the exhaust chamber. In addition, even when the electrolyte solution in the unit cell enters the exhaust chamber due to the inclination of the battery, it is possible to form a sufficiently large exhaust chamber that accommodates the electrolyte solution entering the exhaust chamber and does not leak to the outside.

According to the battery of the present invention described in (16) above, it is possible to set a short exhaust passage from the concentrated exhaust chamber to the outside of the battery.

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

According to the battery of the present invention described in (18) above, it is possible to form a lead acid battery having a hanging support hook that is easy to carry and having a sufficiently large exhaust chamber like the lead acid battery of (15).

Description of drawings

Fig. 1 is a perspective view of a state in which the upper cover of the lead-acid battery according to the present embodiment is opened as viewed obliquely from above;

Fig. 2 is the plan view that observes the middle cover of the lead storage battery of the same embodiment from above;

Fig. 3 is a plan view of the middle cover of the lead storage battery of the same embodiment as observed from the unit cell side;

Fig. 4 is a plan view showing the inner surface of the upper cover of the lead storage battery of the same embodiment;

Fig. 5 is the state that the upper cover is installed in the recess of the middle cover of the lead storage battery of the same embodiment, along the A-A line of Fig. 2 and Fig. 4;

Fig. 6 is a cross-sectional view and a side view showing an upper cover portion of the centralized exhaust chamber of the lead-acid storage battery according to the above embodiment.

Fig. 7 is the state that the upper cover is installed in the concave part of the middle cover of the lead storage battery of the same embodiment, along the B-B line sectional view of Fig. 3;

Fig. 8(a) is a sectional view taken along line C-C in Fig. 7, and Fig. 8(b) is a modified example of (a).

Symbol Description

1...lead battery, 2...battery shell, 3...middle cover, 4...top cover, 5...positive terminal, 6...negative terminal, 11...short side, 21...side Wall, 31...recess, 32...bottom wall, 32'...partial bottom wall, 33...electrolyte return port, 34...gas discharge port, 35...cell connecting cell, 36...Notch, 37, 37', 37"...Exhaust chamber, 38, 39, 40...Exhaust small chamber, 41...Centralized exhaust chamber, 42...Hook for suspension support, 43, 44, 45... Partition wall of exhaust chamber, 46, 47... Next door, 48, 49... Notch, 50... Next door, 51... Notch or through hole, 52... Note Liquid chamber, 53...partition wall, 54...opening (liquid injection port), 55...alignment pin (pin-shaped protrusion), 56...joining protrusion, 57, 58, 59. ..cell partition wall, 60...side wall, 61...partition wall, 62, 63...tubular body, 64...lower end, 65...peripheral partition wall, 66...cylindrical hole , 67... gap or through hole, 68... baffle, 69... gap, 70... baffle, 71... porous body (filter), 72... convex part, 73. ..exhaust channel, 74...rib-like protrusion, 75...notch or through-hole

Detailed ways

Hereinafter, the present invention will be described in detail through an embodiment, but the present invention is not limited thereto.

FIG. 1 is a perspective view of a six-cell integrated lead acid storage battery 1 according to one embodiment of the present invention as viewed from obliquely above. 2 in Fig. 1 is the battery casing, the inside of which is divided into six unit cells by five partitions (not shown) arranged parallel to the short sides of the battery, and each unit cell is respectively accommodated by a group of positive plates and negative plates. A plate group composed of a separator and an electrolyte (not shown) composed of dilute sulfuric acid. 1, 3 is the middle cover installed on the battery casing 2, and 4 is the upper cover installed in the recess of the middle cover 3. The storage battery case 2, the middle cover 3, and the upper cover 4 are all molded bodies made of polypropylene. The upper end of the partition wall provided in the concave portion of the upper cover 4 and the lower end (not shown) of the partition wall of the upper cover 4 are thermally melted and bonded, and are respectively airtightly bonded. 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 on the middle cover 3, two concentrated exhaust chambers 41 are arranged adjacent to the end exhaust chambers near the short sides of the battery, and on the two short sides of the middle cover 3 A suspension support hook 42 is set respectively in the center. By hooking the suspension strap to the suspension support hook 42, the battery can be transported while the battery is suspended, so that the battery can be easily transported.

FIG. 2 is a view of the inner cover 3 viewed from above. The recess 31 provided on the middle cover 3 is divided into the inner space of the battery and the outer space by the partition wall (the oblique part), and the inner space of the battery is divided into six that are the same as the number of the unit cells, and are respectively exhaust Chambers 37, 37', 37" (there are three in the left half, and the right half is omitted because of left-right symmetry, and the following related structures are also the same).

In the structure used to realize exhausting together, there is also a method of providing an exhaust passage directly connected to each unit cell in addition to the exhaust chamber. A centralized exhaust chamber 41 is arranged at the end of the battery to make the exhaust The gas moves laterally with the six exhaust chambers 37, 37', 37" corresponding to each unit cell and guides it into the concentrated exhaust chamber 41, and exhausts from the concentrated exhaust chamber 41 to the outside of the battery. The space of gas path is little and preferred.In this mode, need to be connected by the six sections that described partition wall forms so that exhaust gas can laterally move.But, in battery use, in order not to make the difference of electrolytic solution amount between unit cells Therefore, the electrolytic solution condensed in the exhaust chambers 37, 37', 37" corresponding to each unit cell does not move laterally in the section, but makes it flow back into the corresponding unit cell. Therefore, in order to prevent the electrolyte from moving laterally among the six sections, it is preferable to provide the exhaust chamber partition walls 43, 44, 45 among the partition walls as barrier walls.

As will be described later, an exhaust chamber partition wall is also provided on the inner surface of the upper cover 4, corresponding to the exhaust chamber partition walls 43, 44, 45 of the middle cover 3, the inner space of the battery is divided into six chambers. There are gaps in the partition walls of the exhaust chambers so that the gas can move laterally in the six chambers. On the other hand, in the case of the middle cover 3, notches are not provided on the exhaust chamber partition walls 43, 44, 45 that divide the chamber into six, and the exhaust chamber partition walls 43, 44, 45 are preferably used to prevent Barrier to lateral movement of electrolyte in six segments.

Take an exhaust chamber 37 in the exhaust chamber 37, 37', 37" as an example for illustration, 35 is a unit cell communication chamber, and the unit cell communication chamber 35 and unit cells pass through the electrolyte return port 33 and the gas discharge port 34 It communicates with the unit cell, wherein the electrolyte return port 33 returns the electrolyte condensed in the exhaust chamber 37 to the unit cell, and the gas discharge port 34 discharges the gas generated in the unit cell to the unit cell communication chamber 35. The unit cell communication chamber 35 is separated from the exhaust chamber 37 by a partition, communicates with the exhaust chamber 37 through a gap 36 provided on the partition, and is isolated from the exhaust chamber 37 by a partition other than the gap 36 .

In addition, the exhaust chamber 37 is divided into three exhaust chambers 38, 39, 40 by two partition walls 46, 47, and a gap (48, 49) is respectively set on the partition walls 46, 47, and the adjacent exhaust chambers The small chambers ( 38 , 39 , 40 ) communicate with each other through gaps 48 , 49 provided on the partition walls 46 , 47 . As will be described later, the bottom surface of the exhaust chamber 37 is inclined along the short sides of the middle cover 3 , and is lower as it gets closer to the unit cell communication chamber 35 and higher as it is farther away from the unit cell communication chamber 35 . The gaps 48, 49 provided on the partition walls 46, 47 are configured so as not to overlap (in a zigzag position in the figure) on a straight line parallel to the slope provided on the bottom surface of the exhaust chamber 37, so as to prolong the gas flow through the exhaust chamber 37. flow path. Accordingly, mist or vapor of the electrolytic solution mixed in the exhaust gas can be efficiently condensed and removed from the exhaust gas while passing through the exhaust chamber 37 .

The above-mentioned concentrated exhaust chamber 41 is separated from the exhaust chamber 37 (the exhaust chamber 39 among the figures) by the partition wall 50, and is connected with the three exhaust chambers 38, 39, 40 through the breach 51 provided on the partition wall 50, The exhaust chamber 40 located farthest from the unit cell communication chamber 35 communicates.

52 is a liquid injection chamber, which has an opening 54 opened on the unit cell, and is separated from the exhaust chamber 37 (the exhaust chamber 40 in the figure) by a partition wall 53 around it. 55 is a pin for alignment when the upper cover 4 is attached to the concave portion 31 of the middle cover 3 , and is fitted in a cylindrical hole provided on the upper cover 4 , which will be described later. 56 is a convex part for joining, and it reinforces the joint with the upper cover 4. As shown in FIG.

57, 58, and 59 surrounded by dotted lines in FIG. 2 represent the unit cell partition walls provided on the lower side of the middle cover 3 (the side walls of the unit cells), and the exhaust chamber 37 and the exhaust chamber 41 adjacent to it. The air chamber partition wall 43 is staggered toward the center side of the battery from the position of the unit cell partition wall 57, which is arranged to pass through the opening provided on the exhaust chamber 37, 37' and the bottom wall 32 of the middle cover 3 (Electrolyte solution return port 33, gas discharge port 34) communicated between two unit cells. If the position of the exhaust chamber partition wall 43 is made to coincide with the position of the unit cell partition wall 57, the space volume of the exhaust chamber 37 becomes extremely small compared with the other exhaust chambers 37', 37", and the above-mentioned exhaust chamber 37 Electrolyte cannot be fully condensed inside, and the electrolyte will leak from the exhaust chamber 37 to the outside of the battery, and the recovery function and anti-leakage function of the electrolyte will be deteriorated. In this regard, according to this embodiment, it is possible to use centralized exhaust The space volume of the exhaust chamber 37 adjacent to the chamber 41 is the same as that of the other exhaust chambers 37', 37", or it is prevented from becoming extremely small. In the present embodiment, as the exhaust chamber partition wall 43 is shifted toward the battery center side, the exhaust chamber partition wall 44 is also shifted toward the battery center side relative to the unit cell partition wall 58 . By shifting the positions of the exhaust chamber partition walls 43 and 44 from the unit cell partition walls 57 and 58 in this way, the spatial volumes of the three exhaust chambers 37 , 37 ′, 37 ″ can be made approximately the same.

FIG. 3 is a view of the inner cover 3 viewed from the direction facing the unit cells. The shaded parts are the end surfaces of the side wall 60 and the end surfaces of the cell partition walls 57 , 58 , and 59 that are bonded to the side wall of the battery case 2 and the opening end surfaces of the cell partition walls, which are not shown, by thermal fusion bonding. The battery is partitioned into six unit cells by five unit cell partition walls. As mentioned above, the bottom wall 32 of the middle cover 3 is provided with an opening consisting of the same number of electrolyte return ports 33 and gas discharge ports 34 as the number of unit cells, through which the unit cells communicate with the exhaust chamber.

In addition, on the wall surface of the bottom wall 32 of the middle cover 3 facing the unit cell, a cylindrical body 62 and a cylindrical body 63 are disposed. The cylindrical body 62 surrounds the electrolyte return port 33 and extends toward the unit cell. The cylindrical body 63 surrounds the gas The discharge port 34 also extends toward the direction of the unit cells.

4 is a view of the upper cover 4 viewed from the inner surface, and has exhaust chamber partition walls 43, 44, 45 and outer peripheral partition walls (exhaust chamber partition walls and outer peripheral partition walls) overlapping with the partition walls (exhaust chamber partition walls and outer peripheral partition walls) provided on the upper surface of the middle cover 3. The partition wall 65 also has a cylindrical hole 66 fitted with the alignment pin 55 provided on the middle cover 3 . Notches 67 are provided on the exhaust chamber partition walls 43 , 44 , and 45 that divide the space inside the battery into six, respectively, to form paths through which exhaust gas can move laterally between the exhaust chambers. In addition, a baffle plate 68 for suppressing movement of the electrolytic solution is disposed at a position facing the notch 67 . Moreover, a gap 69 is provided on the partition wall separating the electrolyte return port 33 side and the gas exhaust port 34 side of the unit cell communication chamber 35 to form a path for the gas discharged from the unit cell to the exhaust chamber 37. A baffle 70 is disposed at a position facing the notch 69 to prevent the electrolytic solution discharged from the unit cells from being mixed with gas from moving to the exhaust chamber 37 .

When the upper cover 4 is installed on the recess 31 of the middle cover 3, the partition wall of the middle cover 3 and the partition wall of the upper cover 4 are arranged in a completely overlapping position, and the upper end of the partition wall of the middle cover 3 and the lower end of the partition wall of the upper cover 4 pass through Hot-melt adhesive bonding. In this way, by joining the partition wall of the middle cover 3 and the partition wall of the upper cover 4, the unit cells communicate with the small chamber 35 and the exhaust chamber 37, between the adjacent exhaust chambers (38, 39, 40), the exhaust chamber 37 and the concentrated exhaust. Chamber 41 is isolated except for the gaps provided in the partition walls.

In addition, as shown in Fig. 2 and Fig. 4, on the partition wall 53 that surrounds the liquid injection chamber 52, no breach is provided, by joining the partition wall of the upper cover 4 and the partition wall of the middle cover 3, the liquid injection chamber 52 and the exhaust chamber 37, the liquid injection chamber The chamber 52 is hermetically isolated from the space outside the battery.

FIG. 5 is a diagram showing a state in which the upper cover 4 is installed on the recess 31 of the middle cover 3, and the partition wall provided in the recess 31 of the middle cover 3 is joined to the partition wall provided on the inner surface of the upper cover 4. It is FIG. 2 and FIG. 4 A cross-sectional view of the portion indicated by line A-A. The bottom wall 32 of the concave portion 31 of the middle cover 3 keeps inclined, the closer to the unit cell communication chamber 35 the lower the position, and the farther away from the unit cell communication chamber 35 the higher the position is. In addition, as shown in FIG. 2, the partition walls 46, 47 that divide the exhaust chamber 37 into three exhaust chambers 38, 39, 40 are inclined relative to the inclination of the bottom wall 32, so that the exhaust chamber partition walls 43, 44 , 45 and the partition walls 46, 47 form an acute angle, and the gaps 48, 49 of the partition walls 46, 47 are arranged at the lowest position of the above-mentioned inclined bottom surface, so the battery is in a normal state (in a horizontal state). The electrolyte solution condensed in the exhaust chamber 37 moves to the side of the electrolyte return port 33 along the slope provided on the bottom wall 32 of the exhaust chamber without stagnation.

The internal space of the unit cells is airtightly closed to the exhaust chamber 37 and further to the external space of the battery, except for the notch 36 of the partition wall provided for connecting the unit cell communication chamber 35 and the exhaust chamber 37 . When the battery is turned over by mistake, the electrolyte overflows from the unit cells to the unit cell communication chamber 35 and fills the unit cell communication chamber 35. Notch 36. As mentioned above, except for the gap 36, the internal space of the unit cell is airtightly isolated from the external space of the battery, so when the gap 36 is blocked by the electrolyte, air cannot enter the unit cell, and the electrolyte that reaches the gap 36 Atmospheric pressure is applied to the surface, so that the electrolyte solution in the unit cells can be prevented from entering the exhaust chamber in any case, such as when the unit cell communication chamber 35 is turned down and when the unit cell communication chamber 35 is turned upside down. 37.

In addition, when the unit cell communication chamber 35 is turned down, the electrolyte solution condensed in the exhaust chamber 37 passes through the gaps provided in the partition walls 46 and 47 that divide the exhaust chamber 37 into the exhaust chambers 38 , 39 , and 40 . 48 and 49 are moved to the unit cell communication chamber 35 side, so that the electrolyte solution can be prevented from entering the concentrated exhaust chamber 41 . And when the side of unit cell communication cell 35 is turned over to be the upper side, as shown in Fig. The notches 48 and 49 provided on the partition walls 46 and 47 are arranged in a zigzag shape relative to the inclination of the bottom surface of the exhaust chamber 37, and are arranged so as not to overlap on a straight line parallel to the inclination, so that the partition walls will not be in contact with each other even when the battery is turned over. The vertical direction overlaps, so it can prevent the electrolytic solution condensed in the exhaust chamber 38 close to the unit cell communication chamber 35 from passing through and not entering the exhaust chamber 39 in the middle. In addition, the partition walls 46, 47 dividing the exhaust chamber 37 are inclined, and the angle θ formed by the exhaust chamber partition walls 43, 44, 45 and the partition walls 46, 47 is set to be an acute angle, so that each exhaust chamber (38, 39, 40) Form a liquid storage space to prevent the electrolyte condensed in the exhaust chamber 37 from moving to the concentrated exhaust chamber 41 . In order to expand the liquid storage space, as shown in Fig. 2 and Fig. 4, it is preferable to connect the ends of the gaps 48, 49 of the partition walls 46, 47 to the direction of the cell communication chamber 35 (the direction of the bottom wall 32 of the exhaust chamber 37). low direction) bend.

In addition, it is more preferable to make the centralized exhaust chamber 41 be located in the approximate center of the short side of the upper cover 4, the centralized exhaust chamber 41 communicates with the exhaust chamber 40 farthest from the unit cell communication chamber 35, and the unit cell communication chamber 35 is turned sideways. In the lower state, the unit cell communication chamber 35 is located above the exhaust chamber 40 , so that the electrolytic solution condensed in the exhaust chamber 37 can be prevented from moving to the centralized exhaust chamber 41 .

Mist or vapor of the electrolytic solution mixed in the exhaust gas discharged from the unit cells condenses while passing through the exhaust chamber 37 , and most of it is removed before reaching the centralized exhaust chamber 41 . However, there may be a trace amount of electrolytic solution contained in the exhaust gas reaching the centralized exhaust chamber 41 . In order to remove this trace amount of electrolyte, as shown in FIG. 5 , a porous body 71 made of polypropylene or ceramics is fitted as a filter inside the partition wall 50 of the upper cover 4 surrounding the concentrated exhaust chamber 41 . In order to achieve smooth exhaust without increasing the pressure in the exhaust chamber 37 , it is preferable that the exhaust gas passes along the thickness direction of the filter 71 . Therefore, it is necessary to provide a space between the filter 71 and the inner wall surface of the upper cover 4 . This filter 71 fits on the cylindrical partition wall 50 of the concentrated exhaust chamber 41 and is stuck, so it is difficult to locate, but the convex part 72 can be provided on the inner surface of the upper cover 4, so that the inner wall surface of the upper cover 4 and the filter Spacers are set between the devices 71. This method is preferable because it is simple and can ensure a certain interval. The shape and quantity of the convex portion 72 are not particularly limited, but in order to make the interval between the filter 71 and the inner wall surface of the upper cover 4 parallel, it is preferable to make the inner peripheral part of the concentrated exhaust chamber 41 on the inner wall surface of the upper cover 4. An annular step, or at least three protrusions 72 are arranged at equal intervals. With this structure, the gas that has moved to the concentrated exhaust chamber 41 moves into the filter 71 along the thickness direction of the filter 71, reaches the upper cover 4 side space of the concentrated exhaust chamber 41, and is discharged to the outside through the exhaust passage 73. .

The bottom surface of the concentrated exhaust chamber 41 is preferably arranged to be inclined, the closer to the gap (51 in Fig. 2 ) provided on the partition wall 50 for communicating with the concentrated exhaust chamber 41 and the exhaust chamber 40, the lower, and the farther away from the gap 51, the higher . In addition, it is preferable to arrange the exhaust channel 73 for exhausting gas to the outside of the battery at a position close to the notch 51 . When the gas in the exhaust chamber 37 moves from the exhaust chamber 37 to the centralized exhaust chamber 41 due to the air pressure in the exhaust chamber 37 in a state where the pressure in the exhaust chamber 37 is increased due to the gas discharged from the unit cells, the gas flow tends to concentrate in the exhaust chamber 41. The inner portion away from the inlet of the centralized exhaust chamber 41 (corresponding to the notch 51). Therefore, in the exhaust chamber 37, the mist and vapor flow of a small amount of electrolyte mixed with gas without condensation are also easy to concentrate in the inside of the concentrated exhaust chamber 41, and the part of the electrolyte in the concentrated exhaust chamber 41 condenses and causes the filter to 71 A blockage may occur. By inclining the bottom of the centralized exhaust chamber 41, the arrangement of the gas exhaust channel 73 leading from the centralized exhaust chamber 41 to the outside of the battery is the above-mentioned structure, so that the exhaust gas can pass through the filter 71 evenly.

In order to shorten the length of the exhaust passage 73, it is preferable to provide the centralized exhaust chamber 41 adjacent to the exhaust chamber 37 located at the end of the battery. In addition, as mentioned above, the porous filter 71 is arranged in the centralized exhaust chamber 41 to prevent the electrolyte that is not completely condensed in the exhaust chamber 37 from being discharged to the outside of the battery, but when only one centralized exhaust chamber 41 is provided, If the filter 71 of the concentrated exhaust chamber 41 is clogged, the exhaust may be hindered. In order to avoid this obstacle, as shown in Figure 2 ~ Figure 4. Two centralized exhaust chambers 41 are preferably arranged on the left and right, and all the exhaust chambers 37, 37', 37" are communicated through the gaps 67 provided on the exhaust chamber partition walls 43, 44, 45 on the inner surface of the upper cover 4.

When joining the partition walls of the middle cover 3 and the upper cover 4 by heat-melt bonding, the partition walls of the middle cover 3 and the upper cover 4 are pressed while heating and softening the partition walls, so the partition walls may be deformed. The filter 71 installed on the concentrated exhaust chamber 41 of the upper cover 4 is fitted in the cylindrical partition wall 50 for forming the concentrated exhaust chamber provided on the inner surface of the upper cover 4 and is stuck, so when the upper cover 4 When the partition wall 50 is deformed and the internal dimensions of the partition wall 50 change, the filter 71 may fall off. In order to prevent such a problem, it is preferable to increase the mechanical strength of the partition wall 50 of the upper cover 4 compared with the partition wall 50 of the middle cover 3 so that the partition wall 50 of the upper cover 4 is less likely to be deformed when the two are joined. Specifically, as shown in FIG. 5 , it is preferable to increase the thickness of the partition wall 50 of the upper cover 4 compared to the thickness of the partition wall 50 of the middle cover 3 . The ratio of both thicknesses is not particularly limited, but it is preferable to set the thickness of the partition wall 50 of the upper cover 4 to be 1.5 to 3 times the thickness of the partition wall 50 of the middle cover 3 . In addition, it is more preferable to set the thickness of the partition wall 50 of the upper cover 4 to be larger, and to provide rib-shaped protrusions 74 on the outer peripheral surface of the partition wall 50 of the upper cover 4 along the height direction of the partition wall. The shape, size, and number of the rib-like protrusions 74 are not particularly limited, but are preferably arranged at least three places at equal intervals along the outer periphery of the partition wall 50 .

As shown in FIG. 2 , a liquid injection port 54 is provided on the middle cover 3 . By providing the liquid injection port 54, liquid can be injected after the middle cover 3 is installed on the battery case 2. In the battery assembly process after the liquid injection, even if the battery is shaken and vibrated, the battery electrolyte will not overflow, and it is easy to carry. Install the upper cover 4 in the recess 31 of the middle cover 3 after liquid injection, and air-tightly bond the partition walls of the middle cover 3 and the upper cover 4 by hot-melt bonding, and surround the partition wall 53 of the above-mentioned liquid injection port 54 and the wall surface of the upper cover 4 The liquid injection chamber 52 airtightly isolated from the exhaust chamber 37 is formed, thereby preventing the electrolyte in the unit cells from leaking out of the exhaust chamber 37 and the outside of the battery through the liquid injection port 54 even when the battery is overturned.

FIG. 6 is a diagram showing the structure of the upper cover 4 side of the concentrated exhaust chamber 41 and the exhaust passage 73 . The gas flowing from below the concentrated exhaust chamber 41 passes through the filter 71 fitted in the partition wall 57 , moves to the space in contact with the inner surface of the upper cover 4 , and is exhausted to the outside of the battery through the exhaust passage 73 . In addition, a space of a certain size can be ensured on the inner surface of the upper cover 4 by the protrusion 72 provided on the inner surface of the upper cover 4 .

FIG. 7 is a cross-sectional view of the middle cover 3 along line B-B in FIG. 3 . In addition, FIG. 7 shows the side wall 21 of the battery case 2, the opening ends of the cell partition walls 57, 58, and a part of the upper cover 4 for easy understanding. In the bottom wall 32 of the middle cover 3, the end surface of the partition wall provided on the wall facing the unit cells, the side wall 21 of the battery case 2, and the opening ends of the unit cell partition walls 57, 58 are airtightly bonded by thermal fusion bonding. . In addition, the partition wall provided on the upper concave portion of the bottom wall 32 of the middle cover 3 and the partition wall provided on the inner surface (the lower side surface in the figure) of the upper cover 4 are air-tightly bonded by heat-melt bonding to form a structure consisting of the middle cover 3. And the exhaust chamber 37 that loam cake 4 surrounds. As mentioned above, the gas generated from the unit cell reaches the unit cell communication chamber 35 through the gas discharge port 34, and moves to the exhaust chamber through the gap 67 provided on the exhaust chamber partition wall (43, 44, 45) of the upper cover 4. (37, 37 ′, 37 ″), it is introduced into a centralized exhaust chamber (not shown) communicated with the exhaust chamber 37, and is discharged to the outside of the battery through the centralized exhaust chamber. After the gas moves into the exhaust chamber 37 During the process, the mist and vapor of the electrolyte mixed with gas condense into liquid, and flow back into the unit cell from the exhaust chamber 37 through the electrolyte return port 33 .

As mentioned above, the bottom wall 32 of the middle cover 3 is provided with a cylindrical body 62 and a cylindrical body 63, the cylindrical body 62 surrounds the electrolyte return port 33 and extends toward the unit cells, and the cylindrical body 63 surrounds the gas discharge port 34 And extend to the unit cell. The role of the cylindrical body 62, 63 is to prevent the droplet of the electrolytic solution generated by the apex (crest) of the wave and the wall surface of the wave and the battery case 2 from reaching the electrolytic solution return port 33, Gas outlet 34 .

In addition, by setting the lower ends 64 of the cylindrical bodies 62, 63 to immerse into the electrolyte solution of the unit cells (the lower ends 64 of the cylindrical bodies 62, 63 are in a state below the surface of the electrolyte solution), it is possible to separate the surface of the electrolyte solution into The small area prevents the electrolyte from reaching the electrolyte return port 33 and the gas discharge port 34 when the battery is tilted. The thickness and cross-sectional shape of the cylindrical body 62 and the cylindrical body 63 are not particularly limited. In order to prevent the electrolyte from reaching the electrolyte return port 33 and the gas discharge port 34 when the battery is tilted, it is desirable to separate the electrolyte surface as much as possible. The area is small, and the thickness of the cylindrical bodies 62, 63 is preferably small.

In this embodiment, it is preferable to provide notches or through holes on the wall surface of the cylindrical body 63 that surrounds the gas discharge port 34 and extends toward the unit cells. The size and position of the notch or through-hole are not particularly limited, but as mentioned above, in order to prevent the electrolyte solution from reaching the gas discharge port 34 when the electrolyte solution fluctuates, the size is preferably small. However, in order to smoothly discharge the gas from the unit cell, it is desirable that the upper end of the notch be above the level of the electrolytic solution even when the electrolytic solution in the unit cell fluctuates or the battery is tilted. Moreover, the preferred size is such that when the cylindrical body 63 is wetted by the electrolytic solution, the liquid film formed by the electrolytic solution will not block the notch or the through hole. In order to satisfy this condition, the notches or through holes provided in the cylindrical body 63 are preferably vertically long. Accordingly, the upper end of the gap or the through hole is set above the electrolyte surface, and as thin as possible, which can prevent the electrolyte from reaching the gas outlet 34 when the electrolyte fluctuates, and at the same time prevent the gap or through hole from being blocked by the liquid film of the electrolyte .

Fig. 8 is a cross-sectional view of a portion indicated by line C-C in Fig. 7 . As mentioned above, the wall surface of the cylindrical body 63 is provided with a longitudinal notch or a through hole 75 .

In the present embodiment, since the notch or the through-hole 75 is provided on the wall surface of the cylindrical body 63 that surrounds the gas discharge port 34 and extends toward the unit cells as described above, when the electrolyte level fluctuates compared to the electrolyte return port 33 Electrolyte droplets reach the gas discharge port 34 more easily. Electrolyte droplets reaching the gas discharge port 34 form a liquid film on the gas discharge port 34 to block it. If the gas discharge port is blocked by a liquid film and the electrolytic solution condensed thereon stagnates, gas discharge from the unit cell through the gas discharge port 34 may be hindered. In order to prevent the formation of a liquid film, as shown in FIG. 7 , it is preferable to make the shape of the gas discharge port 34 an elongated ellipse or a rectangle rather than a circle or a square.

In addition, in order to avoid the disadvantages of blocking the gas discharge port 34 by forming a liquid film at the gas discharge port 34 and clogging the gas discharge port 34 by foreign matter (sponge-like lead falling off from the pole plate, etc.) floating on the surface of the electrolyte, such as As shown in FIGS. 7 and 8 , it is more preferable to arrange the partial bottom wall 32 ′ containing the gas outlet 34 at a position higher than the bottom wall 32 of the middle cover 3 to increase the distance between the gas outlet 34 and the electrolyte surface.

In addition, it is preferable to set up a partition so that it surrounds the partial bottom wall 32' having the gas discharge port 34 provided on the bottom wall 32 of the middle cover 3, and separates the cell communication chamber 35 so that condensation in the exhaust chamber 37 The electrolytic solution in the battery does not enter the unit cell communication chamber 35, and the gas discharged from the unit cell moves to the exhaust chamber (37, 37) through the gap 67 provided on the exhaust chamber partition wall (43, 44, 45) of the upper cover 4 ', 37").

The above is a description of the structure of this embodiment. As mentioned above, the concave portion 31 of the middle cover 3 is provided with a pin-shaped protrusion 55 for alignment with the upper cover 4, and a pin-shaped protrusion 55 for aligning with the upper cover 4 is provided on the inner surface of the upper cover 4. The cylindrical hole 66 into which the convex part 55 fits. Using the pin-shaped protrusion 55 as the alignment part of the middle cover 3 has the following advantages: after the middle cover 3 is installed on the battery case 2 and the liquid electrolyte is injected, in the process of washing the outside of the battery case 2, even the middle cover 3 Even when the upper surface is wetted with washing water, water will not remain on the fittings and foreign objects will not be bitten.

In order to hang and support the battery stably (without tilting the battery), it is preferable to provide the above-mentioned hook 42 for hanging and supporting at the center of the two short sides among the sides of the battery. In addition, even if the battery is inclined, in order to minimize the influence of the inclination of the electrolytic solution surface on the wall surface of the battery case 2, it is preferable to arrange the above-mentioned unit cell partition walls 57, 58 parallel to the short side (11 in FIG. 2 ) among the sides of the battery. , 59. However, if the suspension support hook 42 is provided on the short side 11 of the inner cover 3, the space capacity of the exhaust chamber 37 adjacent to the short side 11 on which the suspension support hook 42 is provided becomes extremely small. According to this embodiment, as shown in FIG. 2 , even if the unit cell partition walls 57 , 58 , and 59 are arranged parallel to the short sides 11 of the sides of the battery, a suspension support wall is arranged in the center of the short side 11 of the middle cover 3 . For the battery with the hook 42, by arranging the exhaust chamber partition walls 43, 44, 45 regardless of the positions of the unit cell partition walls 57, 58, 59, the exhaust chamber 37 adjacent to the side where the hook 42 for suspension support is provided can be The volume of space has a size no less than that of the other (located at the center side of the battery) exhaust chambers 37', 37".

As mentioned above, although this invention was demonstrated in detail based on one embodiment, this invention is not limited to the said embodiment. In the present invention, for example, the position of the centralized exhaust chamber 41 is not particularly limited, and the position for separating the exhaust chamber 37 adjacent to the centralized exhaust chamber 41 can be set regardless of the positions of the unit cell partition walls 57, 58, and 59. The position of the partition wall 43 of the exhaust chamber is used to achieve the purpose of this application.

Claims (18)

1, a kind of lead accumulator, has mechanism to outside batteries exhaust in the lump, this mechanism is by the battery cell case that holds a plurality of element cells (2), cover the top middle cover (3) of this battery cell case (2) and cover the space that the loam cake (4) of the recess (31) of this middle cover (3) is surrounded, with exhaust chamber spaced walls (43,44,45) cut apart this space and the exhaust chamber (37 of counting same number with described element cell is set, 37 ', 37 "); by the breach that is provided with in described exhaust chamber spaced walls (43; 44; 45) or open-work (67) make adjacent exhaust chamber (37; 37 '; 37 ") communicate with each other, exhaust chamber (37,37 ', 37 ") and the open communication of element cell by constituting by electrolyte refluxing opening (33) that is provided with at the diapire (32) of middle cover (3) and gas discharge outlet (34); have with this exhaust chamber (37; 37 '; the concentrated exhaust chamber (41) of 37 ") connection, to import described exhaust chamber (37 from the gas that described element cell produces, 37 ', 37 "); via described concentrated exhaust chamber (41) to outside batteries exhaust in the lump; it is characterized in that

The next door of the opening that is made of described electrolyte refluxing opening (33) and gas discharge outlet (34) is surrounded in configuration, have by this next door and described exhaust chamber (37,37 ', the element cell that separates of 37 ") is communicated with cell (35); the breach (36) that is provided with by next door make this element cell be communicated with cell (35) and exhaust chamber (37,37 ', 37 ") are communicated with, this breach (36) passes through next door isolated location battery connection cell (35) and exhaust chamber (37) in addition.

2, lead accumulator according to claim 1 is characterized in that,

Described exhaust chamber (37,37 ', 37 " diapire) (32) has inclination; the distance apart from the interconnecting part that is communicated with cell (35) connection with element cell is near more then low more; the distance apart from the interconnecting part that is communicated with cell (35) connection with element cell is far away more then high more; described exhaust chamber (37; 37 '; 37 ") are by at least two next doors (46,47) be divided into exhaust cell (38 more than three, 39,40), this next door (46,47) has at least one breach (48,49), adjacent exhaust cell (38,39,40) pass through each other in described next door (46,47) breach (48 of She Zhiing, 49) be communicated with, this breach (48,49) in addition by described next door (46,47) isolate, will be in adjacent next door (46,47) the described breach (48 of She Zhiing, 49) tilted configuration of relative diapire (32) is in flexuose position.

3, lead accumulator according to claim 2 is characterized in that,

With described exhaust chamber (37,37 ', 37 ") the relative inclination diagonal of bottom surface in next door (46,47) that is divided into exhaust cell (38,39,40); the angle θ of this next door (46,47) and described exhaust chamber spaced walls (43,44,45) formation is an acute angle, and the extreme lower position of diapire (32) is provided with described breach (48,49) among this next door (46,47).

4, lead accumulator according to claim 2 is characterized in that,

With described a plurality of exhaust chambers (37,37 ', among 37 "), be arranged at least one exhaust chamber adjoining position config set exhaust chamber (41) of the exhaust chamber (37) at battery both ends; separate described exhaust chamber (37) and concentrated exhaust chamber (41) with next door (50); by breach or the open-work (51) that is provided with in this next door (50); the exhaust cell (40) that is communicated with cell (35) away from described element cell is communicated with concentrated exhaust chamber (41), and this breach or open-work (51) pass through next door (50) separate row air chamber (37) and concentrated exhaust chamber (41) in addition.

5, lead accumulator according to claim 1 is characterized in that,

The built-in porous filter of described concentrated exhaust chamber (41) (71), two spaces up and down that separate into loam cake (4) side and middle cover (3) side by this porous filter (71), the space of described loam cake (4) side is communicated with outside batteries by exhaust passage (73), concentrate the bottom surface of exhaust chamber (41) to have inclination, more then high more away from the interconnecting part that is communicated with exhaust chamber (37), in the described exhaust passage of position configuration (73) near the interconnecting part of concentrating exhaust chamber (41) and exhaust chamber (37).

6, lead accumulator according to claim 5 is characterized in that,

Inner face at the loam cake (4) that forms described concentrated exhaust chamber (41) is provided with protuberance (72), the chimeric concentrated exhaust chamber that is arranged at loam cake (4) that is installed in of described porous filter (71) is separated with cylindrical bulkhead (50), form the space of described loam cake (4) side.

7, lead accumulator according to claim 1 is characterized in that,

Diapire (32) in described middle cover (3) is provided with the fluid injection opening (54) to each element cell opening of counting same number with element cell, separate fluid injection chamber (52) by surrounding this fluid injection with the next door (53) and the loam cake (4) of opening (54), make this fluid injection chamber (52) and described exhaust chamber (37) and outside batteries hermetic closed.

8, lead accumulator according to claim 1 is characterized in that,

Described middle cover (3) and loam cake (4) are made of thermoplastic resin forming body, on described middle cover (3) and the both sides of the inner face of loam cake (4) outer peripheral sidewall (65) is set, described exhaust chamber spaced walls (43,44,45), described element cell is communicated with the next door of cell (35), the next door (50) of described concentrated exhaust chamber (41), be divided into described exhaust cell (38,39,40) next door (46,47), melt by heat and to be bonded in outer peripheral sidewall (65) that middle cover (3) and loam cake (4) be provided with each other, isolate the inside and outside of battery, melt the exhaust chamber spaced walls (43 that is bonded in middle cover (3) and loam cake (4) setting by heat, 44,45) each other, form with element cell and count the exhaust chamber (37 of same number, 37 ', 37 "), form element cell and be communicated with cell (35); exhaust cell (38; 39; 40); concentrate exhaust chamber (41).

9, lead accumulator according to claim 8 is characterized in that,

Separate among the next door (50) of concentrated exhaust chamber (41) and exhaust chamber (37), at the thickness in the next door (50) that the inner face of loam cake (4) is provided with thickness greater than the next door (50) that on middle cover (3), is provided with.

10, lead accumulator according to claim 9 is characterized in that,

Lateral surface in the next door (50) that the inner face of described loam cake (4) is provided with is provided with the rib (74) that the short transverse of along this next door (50) is extended.

11, lead accumulator according to claim 8 is characterized in that,

Described middle cover (3) be provided with the contraposition of loam cake (4) when overlapping with pin (55), loam cake (4) be provided be used for and this contraposition with the chimeric tubular hole (66) of pin (55).

12, lead accumulator according to claim 1 is characterized in that,

Described exhaust chamber (37,37 ', the wall towards element cell of the diapire (32) of 37 ") is provided with the cylindrical body (63) of surrounding described electrolyte refluxing opening (33) and the cylindrical body (62) of extending and surrounding gas discharge outlet (34) and extending in element cell in element cell, be provided with breach or open-work (75) at the wall of the encirclement described gas discharge outlet (34) and the cylindrical body (63) of extending in element cell.

13, lead accumulator according to claim 12 is characterized in that,

Described gas discharge outlet (34) is oval or rectangular opening.

14, lead accumulator according to claim 12 is characterized in that,

With described exhaust chamber (37,37 ', among the diapire (32) of 37 "), the local diapire (32 ') that is provided with described gas discharge outlet (34) is configured in and compares around it diapire away from the position of the electrolysis liquid surface of element cell.

15, lead accumulator according to claim 1 is characterized in that,

The element cell spaced walls (57 of described a plurality of element cell by uniformly-spaced disposing, 58,59) isolate and mutually, described middle cover (3) has described element cell spaced walls (57 at the wall towards element cell, 58,59), has described exhaust chamber spaced walls (43 at wall towards loam cake (4), 44,45), described concentrated exhaust chamber (41) and described exhaust chamber (37,37 ', 37 ") at least one exhaust chamber (37) in abutting connection with and is communicated with this exhaust chamber (37), make at least separate compare with part or all of the exhaust chamber spaced walls (43) of the exhaust chamber (37) of concentrated exhaust chamber (41) adjacency and the exhaust chamber (37 ') adjacent with this exhaust chamber (37) separate by opening (33; 34) with these two exhaust chambers (37; 37 ') element cell spaced walls (57) staggered positions of two element cells of connection.

16, lead accumulator according to claim 15 is characterized in that,

With the exhaust chamber that is positioned at the battery end (37) in abutting connection with configuration described concentrated exhaust chamber (41), part or all that makes described exhaust chamber spaced walls (43) compared element cell spaced walls (57) and staggered to the battery central side.

17, lead accumulator according to claim 16 is characterized in that,

With minor face (11) among the side of battery element cell spaced walls (57,58,59) is set abreast, with the exhaust chamber (37) of the end that is positioned at two minor faces (11) side in abutting connection with described concentrated exhaust chamber (41) is set.

18, lead accumulator according to claim 15 is characterized in that,

Be provided with suspension strut with hook (42) in the central authorities of two minor faces of described middle cover (3), part or all that makes exhaust chamber spaced walls (43) compared element cell spaced walls (57) staggered positions, described exhaust chamber spaced walls (43) separates and the exhaust chamber (37) of this minor face adjacency and adjacent exhaust chamber (37 '), and described element cell spaced walls (57) separates two element cells that are communicated with these two exhaust chambers (37,37 ') by opening (33,34).

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