JP5591628B2 - Secondary battery device - Google Patents

Description

  Embodiments described herein relate generally to a secondary battery device including a plurality of secondary batteries and a housing member that houses them.

  2. Description of the Related Art In recent years, secondary batteries are widely known as power sources for electric vehicles, hybrid electric vehicles, electric bicycles, or electric devices. For example, a lithium ion secondary battery, which is a non-aqueous secondary battery, has attracted attention as a power source for electric vehicles and the like because of its high output and high energy density.

  Furthermore, in order to further increase the capacity and output, a battery pack or a secondary battery device in which a plurality of secondary batteries are arranged in a housing member and these secondary batteries are connected in parallel or in series is provided. Has been developed. Since these assembled batteries and secondary battery devices are used as power sources for electric vehicles and the like, further improvements in safety are required.

JP-A-7-237457 JP 2006-182264 A JP 2009-289655 A

  An object of the present invention is to provide a secondary battery device with further improved safety.

  According to the embodiment, a storage member having a storage case having an opening, an upper case attached to the opening of the storage case, and a plurality of single units each having a safety valve and stored side by side in the storage member. A secondary battery device comprising a cell is provided. The battery has a plurality of first exhaust holes formed in the upper case and facing the respective safety valves of the plurality of single cells, and an exhaust flow path communicating with the plurality of first exhaust holes, And an oxidation catalyst for oxidizing the gas exhausted from the safety valve of the single cell.

The perspective view which shows the secondary battery apparatus of 1st Embodiment. The disassembled perspective view of the said secondary battery apparatus which decomposes | disassembles and shows a storage member and a terminal base. The disassembled perspective view of the said secondary battery apparatus which decomposes | disassembles and shows a 2nd exhaust hole and a non-return valve. The disassembled perspective view of the said secondary battery apparatus which decomposes | disassembles and shows a storage member and a single cell. The perspective view which shows a single cell. The perspective view which expands and shows one electrode terminal part of the said single cell. Sectional drawing which expands and shows the one electrode terminal part of the said single cell. The perspective view which shows the inner surface side of the upper case which comprises the said accommodating member. Sectional drawing of the secondary battery apparatus along line VII-VII of FIG. The disassembled perspective view which shows a cell unit, an upper case, and a common bus bar. The disassembled perspective view which shows the bus-bar mounting part of a bus-bar unit and an upper case. The top view which shows a positive electrode bus bar, a negative electrode bus bar, and a common bus bar. The disassembled perspective view which shows a terminal base and an output terminal. The fragmentary sectional view of the secondary battery device of a 2nd embodiment. The perspective view which shows the secondary battery apparatus of 3rd Embodiment. The perspective view which shows the modification of the secondary battery apparatus of 3rd Embodiment.

(First embodiment)
Hereinafter, the secondary battery device according to the embodiment will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an external appearance of a secondary battery device 200 according to the embodiment. FIG. 2 is a perspective view showing a bus bar mounting structure of the secondary battery device 200 by removing the top cover 20 of the secondary battery device 200. 3 is a perspective view seen from the back side of the secondary battery device 200 of FIG. 1, and FIG. 4 is an exploded perspective view of the secondary battery device showing the housing member and the single cell in an exploded manner.

  As shown in FIGS. 1, 2, 3, and 4, the secondary battery device 200 includes a substantially rectangular housing member 10 and a plurality of, for example, 30 single cells (two) housed in the housing member. Secondary battery) 12, and is configured as an assembled battery. The housing member 10 includes a housing case 14 that is formed in a box shape with the upper side open and that forms a bottom wall and a side wall, an upper case 18 that is formed in a rectangular plate shape and forms a ceiling wall 18a, and a top cover 20. . An upper case 18 is installed facing the bottom wall of the housing case 14, the housing case 14 and the upper case 18 are joined, and the upper surface side of the upper case 18 is covered with a rectangular plate-shaped top cover 20, thereby forming a rectangular box shape. The housing member 10 is configured. Each component of the housing member 10 is made of an insulating synthetic resin, for example, PPE.

  A rectangular plate-like terminal base 22 formed of a synthetic resin is fixed to a side wall located on one end side in the longitudinal direction of the housing member 10, for example, the front end wall 10a by, for example, screwing. A positive output terminal 24 and a negative output terminal 26 of the secondary battery device 200 are attached to the terminal base 22.

  As shown in FIGS. 5, 6, and 7, each single cell 12 is a non-aqueous electrolyte secondary battery such as a lithium ion battery. For example, a flat rectangular box-shaped exterior made of aluminum or an aluminum alloy is used. The container 30 and the electrode body 31 accommodated in the exterior container 30 together with the nonaqueous electrolytic solution are provided. The outer container 30 includes a container body 30a having an open upper end and a rectangular plate-like lid body 30b welded to the container body and closing the opening of the container body, and is formed in a liquid-tight manner. The electrode body 31 is formed in a flat rectangular shape, for example, by winding a positive electrode plate and a negative electrode plate in a spiral shape with a separator interposed therebetween, and further compressing in a radial direction.

  A positive electrode terminal 32a and a negative electrode terminal 32b are provided at both ends in the longitudinal direction of the lid body 30b and project from the lid body 30b. The positive electrode terminal 32 a and the negative electrode terminal 32 b are connected to the positive electrode and the negative electrode of the electrode body 31, respectively. One terminal, for example, the positive electrode terminal 32 a is electrically connected to the lid body 30 b and has the same potential as the outer container 30. The negative terminal 32b extends through the lid 30b. A sealing material made of an insulating material such as synthetic resin or glass, for example, a gasket 34 is provided between the negative electrode terminal 32b and the lid 30b, and the gap between the negative electrode terminal 32b and the outer container 30 is sealed in a liquid-tight manner. And electrically insulated.

  In the present embodiment, an annular sealing material 35 having cushioning properties is mounted around the lower end portion of the negative electrode terminal 32b. The sealing material 35 is formed by, for example, a double-sided tape. The sealing material 35 is in close contact with the periphery of the negative electrode terminal 32b and the upper surface of the lid 30b. As will be described later, when the single cell 12 is mounted in the housing member 10, the sealing material 35 comes into liquid-tight contact with the inner surface of the upper case 18 and prevents a short circuit between the negative electrode terminal 32 b and the outer container 30.

  As shown in FIG. 5, for example, a rectangular safety valve 36 is formed at the center of the lid 30b. The safety valve 36 is formed by a thin portion in which a part of the lid 30b is thinned to about half the thickness, and a plurality of inscriptions are formed at the center of the upper surface of the thin portion. When gas is generated in the outer container 30 due to an abnormal mode or the like of the single cell 12 and the internal pressure in the outer container rises to a predetermined value or more, the safety valve 36 is opened and the internal pressure is lowered to rupture the outer container 30 or the like. Prevent malfunctions.

  An insulating film 37 is provided around the container body 30a except for the upper and lower ends of the container. The film 37 regulates the expansion of the outer container 30 and prevents a short circuit between the outer container 30 and another single cell 12 or a short circuit between the outer container 30 and another member.

  As shown in FIG. 4, the single cell 12 is provided by connecting a plurality of single cells, for example, three single cells 12 in parallel to form one cell unit C, and connecting 10 units of the cell units C in series. It has been. The arrangement of the single cells 12 will be described later in detail.

  As shown in FIG. 8, on the inner surface side of the upper case 18, a number corresponding to the number of unit cells 12, here, thirty engagement grooves 54 are formed. Each engagement groove 54 is formed in an elongated rectangular shape corresponding to the cross-sectional shape of the outer container 30 of the single cell 12, and extends along the width direction of the upper case 18. The plurality of engaging grooves 54 are provided in two rows at a predetermined interval in the longitudinal direction of the upper case 18. Center ribs 59 are formed between the two rows and extend over the entire length of the upper case 18 in the longitudinal direction.

  In the upper case 18, rectangular through holes 56 a and 56 b corresponding to the positive electrode terminal 32 a and the negative electrode terminal 32 b of the single cell 12 are formed at the bottom of each engagement groove 54, and facing the safety valve of the single cell 12. A first exhaust hole 57 is formed. The through holes 56a and 56b are located at both ends of the engagement groove 54, and the first exhaust hole 57 is located in the middle between the through holes 56a and 56b. In the present embodiment, the positive terminal 32a of the single cell 12 is formed larger than the negative terminal 32b. Correspondingly, the through hole 56a for inserting the positive terminal 32a is formed larger than the through hole 56b for inserting the negative terminal 32b.

  The upper case 18 is fixed to the upper surface side of the housing case 14 by, for example, screwing, and constitutes the ceiling wall 18a of the housing member 10.

  As shown in FIG. 4, the single cell 12 is housed in the housing case 14 for each cell unit C. The upper end portion of each single cell 12, that is, the end portion on which the electrode terminal is provided is fitted into the engagement groove 54 of the upper case 18 and is fixed to the upper case 18 with an adhesive or the like.

  The positive electrode terminal 32 a and the negative electrode terminal 32 b of the single cell 12 are inserted through the through holes 56 a and 56 b, respectively, and protrude from the upper surface side of the upper case 18. The safety valve 36 of the single cell 12 is positioned opposite to the first exhaust hole 57 of the upper case 18.

  As shown in FIG. 4, in one cell unit C, the three single cells 12 are arranged in a state where the main surfaces face each other with a predetermined gap and the electrode terminals face the same direction. Further, in one cell unit C, the three single cells 12 are arranged such that the positive terminals 32a are arranged in a line and the negative terminals 32b are arranged in a line. The ten cell units C are arranged in two rows of five cell units, and in each row, the positive electrode terminals 32a and the negative electrode terminals b of adjacent cell units are alternately arranged.

  A plurality of bus bars are provided on the upper surface side of the upper case 18, and the plurality of single cells 12 in each cell unit C are connected in parallel by these bus bars, and the plurality of cell units C are connected in series. Yes. Specifically, as shown in FIGS. 2, 4, 10, and 11, the upper surface of the upper case 18 is formed one step lower, and a peripheral wall 18 a is erected along the periphery of the upper surface. A center rib 61 is formed on the upper surface of the upper case 18 at the center in the width direction, and extends in the longitudinal direction from one end in the longitudinal direction of the upper case 18 to the vicinity of the other end. On the upper surface of the upper case 18, a pair of partition walls 60 a and 60 b are erected on both sides of the center rib 61. The pair of partition walls 60 a are located on both sides of each first exhaust hole 57 formed in the upper case 18, and extend parallel to each other along the longitudinal direction from one longitudinal end to the other end of the upper case 18. Similarly, the pair of partition walls 60b are located on both sides of each first exhaust hole 57 formed in the upper case 18, and extend in parallel with each other along the longitudinal direction from one longitudinal end of the upper case 18 to the other end. ing. The center rib 59, the partition walls 60a and 60b, and the peripheral wall 18a are formed at substantially the same height.

  As shown in FIGS. 2, 4, and 9, an elongated rectangular blocking plate 90 a is fixed on a pair of partition walls 60 a erected on the upper surface of the upper case 18, so that the upper case 18 has an overall length in the longitudinal direction. It extends over. The space between the partition walls 60a is closed by the closing plate 90a, and an exhaust flow path 92a extending over the entire length of the upper case 18 in the longitudinal direction is formed by this space. The first exhaust holes 57 formed in the ceiling wall 18a of the upper case 18 and arranged in a row communicate with the exhaust passage 92a. As shown in FIG. 3, a second exhaust hole 94a communicating with one end of the exhaust passage 92a is formed in one end of the upper case 18 in the longitudinal direction, for example, the rear end wall. The second exhaust hole 94 a is closed by a check valve 96 a attached to the rear end wall of the upper case 18.

  Similarly, on the pair of partition walls 60 b erected on the upper surface of the upper case 18, an elongated rectangular closing plate 90 b is fixed and extends over the entire length of the upper case 18 in the longitudinal direction. The space between the partition walls 60b is closed by the closing plate 90b, and an exhaust passage 92b extending over the entire length of the upper case 18 in the longitudinal direction is formed by this space. The first exhaust holes 57 formed in the ceiling wall 18a of the upper case 18 and arranged in a row communicate with the exhaust passage 92b. A second exhaust hole 94b communicating with one end of the exhaust flow path 92b is formed in one end of the upper case 18 in the longitudinal direction, for example, the rear end wall. The second exhaust hole 94 b is closed by a check valve 96 b attached to the rear end wall of the upper case 18.

  A catalyst body 100 is provided in the exhaust passages 92a and 92b. As shown in FIG. 9, the first exhaust hole 57 located on the safety valve 36 of the single cell 12 is covered with the plate-like catalyst body 100. Is done. The plate-like catalyst body 100 is formed to a size that completely covers each first exhaust hole 57. For example, it is formed in a belt shape similar to the bottom surfaces of the exhaust flow paths 92a and 92b, and is spread over the bottom surfaces of the exhaust flow paths 92a and 92b.

  The catalyst body 100 includes an oxidation catalyst that oxidizes the gas exhausted from the single cell, and is preferably a porous body. For example, a porous body in which the catalyst is formed into a hollow fiber shape and arranged three-dimensionally, a porous body in which the catalyst is held on a sponge-shaped carrier, a honeycomb catalyst, or the like can be used.

As the oxidation catalyst, a catalyst that oxidizes carbon monoxide is used. Specifically, CuO / MnO catalyst, Fe ₂ O ₃ / MnO catalyst, Au catalyst, Au / Fe ₂ O ₃ catalyst, Au / TiO ₂ catalyst, Pd catalyst, Pd / Al ₂ O ₃ catalyst, etc. However, a catalyst having oxidation activity at a relatively low temperature is preferable. Preferably, a catalyst such as palladium having an oxidation activity at 200 ° C. or less, more preferably 100 ° C. or less, and even more preferably a gold such as Au / Fe ₂ O ₃ and Au / TiO ₂ having an oxidation activity at 50 ° C. Nanoparticle catalysts are used.

  Here, the gold nanoparticle catalyst refers to a catalyst in which nanosized gold particles are supported on a metal oxide. The average particle diameter of the gold particles of the gold nanoparticle catalyst is not less than the size of the gold atom and not more than about 25 nm, preferably about 1 to 10 nm. The average particle diameter of the gold particles is a value measured by transmission electron microscopy.

  Examples of metal oxides supporting gold particles include zinc oxide, iron oxide, copper oxide, lanthanum oxide, titanium oxide, cobalt oxide, zirconium oxide, magnesium oxide, beryllium oxide, nickel oxide, chromium oxide, scandium oxide, and oxide. Single metal metal oxide selected from the group consisting of cadmium, indium oxide, tin oxide, manganese oxide, vanadium oxide, cerium oxide, aluminum oxide, and silicon oxide; zinc, iron, copper, lanthanum, titanium, cobalt, zirconium A composite oxide of two or more metals selected from the group consisting of magnesium, beryllium, nickel, chromium, scandium, cadmium, indium, tin, manganese, vanadium, cerium, aluminum, and silicon can be used. The above-mentioned single metal metal oxide and composite oxide can be mixed and used as necessary.

  The gold nanoparticle catalyst may be used together with an alkaline porous material powder. By allowing the gold nanoparticle catalyst and the alkaline porous material powder to coexist, it is possible to suppress the deterioration of the activity before and during the reaction. A gold nanoparticle catalyst and an alkaline porous body can be mixed and used, or can be used in a state where the gold nanoparticle catalyst is supported on the alkaline porous body.

The alkaline porous body may be a porous body carrying an alkali component or a porous body that exhibits alkalinity. The alkaline component may be an alkali metal or alkaline earth metal oxide, hydroxide, and carbonate. Specific examples include MgO, CaO, Mg (OH) ₂ , Ca (OH) ₂ , Na ₂ CO ₃ , K ₂ CO _{3 and the} like. The porous body may be in any form such as powder, fiber, sponge, and honeycomb. Specific examples of the porous body include activated carbon, carbon black, zeolite, silica, alumina, iron oxide, and titanium oxide. When the alkaline porous body is itself a porous body exhibiting alkalinity, a high-purity ultrafine powder magnesia (manufactured by Ube Materials Co., Ltd.) is exemplified as a specific example. The form of the alkaline porous body can be appropriately selected according to the purpose of use, and examples thereof include powders and granules. The gold nanoparticle catalyst described above is long if no catalyst poisoning substance coexists. It can be used for a long period of time, and can be suitably used because it has oxidation activity in a wide CO concentration.

  As the oxidation catalyst, the catalyst may be used alone, or a supported catalyst supported on a carrier may be used. The supported catalyst is not limited to this. For example, after applying a conductive material such as carbon to urethane foam resin and electroplating the catalyst, the catalyst is heated to decompose or remove the urethane resin, or is composed of catalyst fine particles and a binder. The slurry can be produced by impregnating a urethane foam resin and drying, followed by reduction sintering in a hydrogen atmosphere.

  The oxidation catalyst and the supported catalyst may be in any form such as powder, granule, bead, or fiber, or may be formed into a pellet.

  A porous body that can be used as the catalyst body 100 and in which the catalyst is molded into a hollow fiber shape and arranged three-dimensionally can be produced, for example, as follows. First, a slurry is prepared by mixing catalyst particles and a binder in a suitable solvent. This slurry is applied to a sinterable substrate such as a nonwoven fabric, and then heated to burn the substrate and decompose and remove the binder. As the binder, a polymer that does not foam during thermal decomposition is preferably used. For example, PVdF, PP, polymethylpentene, etc. can be used. As the solvent, NMP or water can be used. When water is used, it is preferable to add CMC as a dispersing material.

  When gas is generated in the outer container 30 due to an abnormal mode or the like of the single cell 12 and the internal pressure in the outer container rises to a predetermined value or more, the safety valve 36 is opened, and the gas is released to the outside through the safety valve 36. . In this case, the released gas passes through the first exhaust hole 57 and is discharged into one of the corresponding exhaust passages 92a and 92b. When the pressure in the exhaust passages 92a and 92b increases due to the discharge of gas, the check valves 96a and 96b are opened, and the gas in the exhaust passage is discharged to the outside through the second exhaust holes 94a and 94b. . At this time, the gas released from the single cell 12 is oxidized by coming into contact with the catalyst body 100, and for example, even if carbon monoxide is contained, it is oxidized to carbon dioxide.

  In the secondary battery device 200 according to the embodiment, since the oxidation catalyst is installed in the exhaust passage closed by the check valves 96a and 96b, poisoning of the catalyst is suppressed and the catalytic activity is maintained high. It has excellent carbon monoxide removal ability. In addition, since the gas released from the single cell 12 is once confined in the exhaust flow path closed by the reverse support valves 96a and 96b, the efficiency of the catalytic reaction is increased and the amount of catalyst can be reduced. Moreover, since the efficiency of the catalytic reaction is high, the ability to remove carbon monoxide can be exhibited even when the temperature of the gas released from the single cell 12 is low.

  As shown in FIGS. 2, 4, and 10, two partition walls 62 extending between the peripheral wall 18a and the partition wall 60a are erected on the upper surface of the upper case 18, respectively. The partition wall 62 is formed at substantially the same height as the peripheral wall 18a and the partition wall 60a. The peripheral wall 18a, the partition wall 60a, and the partition wall 62 define three bus bar mounting chambers 64a, 64b, and 64c arranged in the longitudinal direction of the upper case 18. In the housing member 10, when the side wall on which the output terminals 24 and 26 are provided is the front end wall 10a and the opposite side wall is the rear end wall 10b, the bus bar mounting chambers 64a, 64b, 64c are lined up.

  Three through holes 56a for the positive terminal 32a are opened in the bus bar mounting chamber 64a located on the front end wall 10a side, and are arranged at regular intervals along the longitudinal direction of the upper case 18. A plurality of holding ribs 66 project from the upper surface of the upper case 18 in the bus bar mounting chamber 64a. Each holding rib 66 is formed between adjacent through holes 56 a and extends in the width direction of the upper case 18. Each holding rib 66 is formed at a height lower than that of the partition wall 62.

  In the middle bus bar mounting chamber 64b and the bus bar mounting chamber 64c on the rear end wall 10b side, in order from the front end wall 10a side, three through holes 56b for the negative terminal 32b and three through holes for the positive terminal 32a. The openings 56 a are opened and are arranged at a predetermined interval along the longitudinal direction of the upper case 18. A plurality of holding ribs 66 project from the upper surface of the upper case 18 in each of the bus bar mounting chambers 64b and 64c. The holding ribs 66 are respectively formed between the adjacent through holes 56 a and 56 b and extend in the width direction of the upper case 18. Each holding rib 66 is formed at a height lower than that of the partition wall 62.

  In the middle bus bar mounting chamber 64b and the bus bar mounting chamber 64c on the rear end wall 10b side, in order from the front end wall 10a side, three through holes 56b for the negative terminal 32b and three through holes for the positive terminal 32a. The openings 56 a are opened and are arranged at a predetermined interval along the longitudinal direction of the upper case 18. A plurality of holding ribs 66 project from the upper surface of the upper case 18 in each of the bus bar mounting chambers 64b and 64c. The holding ribs 66 are respectively formed between the adjacent through holes 56 a and 56 b and extend in the width direction of the upper case 18. Each holding rib 66 is formed at a height lower than that of the partition wall 62.

  Two partition walls 62 extending between the partition wall 60 a and the center rib 61 are provided upright on the upper surface of the upper case 18. The partition wall 62 is formed at substantially the same height as the center rib 61 and the partition wall 60a. The partition wall 60a, the center rib 61, and the partition wall 62 define two bus bar mounting chambers 68a and 68b arranged in the longitudinal direction of the upper case 18, and further, the partition wall 60a, the peripheral wall 18a, and the partition wall 62 A bus bar mounting chamber 70 extending in the width direction of the upper case 18 is defined. Bus bar mounting chambers 68a, 68b, and 70 are arranged in order from the front end wall 10a side.

  In each of the bus bar mounting chamber 68a and the middle bus bar mounting chamber 68b located on the front end wall 10a side, in order from the front end wall 10a side, three through holes 56b for the negative terminal 32b and three through holes for the positive terminal 32a are provided. The holes 56 a are opened and are arranged at regular intervals along the longitudinal direction of the upper case 18. A plurality of holding ribs 66 project from the upper surface of the upper case 18 in each bus bar mounting chamber 68a, 68b. The holding ribs 66 are respectively formed between the adjacent through holes 56 a and 56 b and extend in the width direction of the upper case 18. Each holding rib 66 is formed at a height lower than that of the partition wall 62.

  Two partition walls 62 extending between the partition wall 60 b and the center rib 61 are erected on the upper surface of the upper case 18. The partition wall 62 is formed at substantially the same height as the peripheral wall 18a and the partition wall 60a. The partition wall 60b, the center rib 61, and the partition wall 62 define two bus bar mounting chambers 72a and 72b arranged in the longitudinal direction of the upper case 18, and further, the partition wall 60b, the peripheral wall 18a, and the partition wall 62 The aforementioned bus bar mounting chamber 70 extending in the width direction of the upper case 18 is defined. Bus bar mounting chambers 68a, 68b, and 70 are arranged in order from the front end wall 10a side.

  Each of the bus bar mounting chamber 72a and the middle bus bar mounting chamber 72b located on the front end wall 10a side has three through holes 56a for the positive terminal 32a and three through holes for the negative terminal 32b in order from the front end wall 10a side. The holes 56b open and are arranged at regular intervals along the longitudinal direction of the upper case 18. A plurality of holding ribs 66 project from the upper surface of the upper case 18 in each of the bus bar mounting chambers 72a and 72b. The holding ribs 66 are respectively formed between the adjacent through holes 56 a and 56 b and extend in the width direction of the upper case 18. Each holding rib 66 is formed at a height lower than that of the partition wall 62.

  As shown in FIGS. 2 and 11, in the bus bar mounting chamber 70, three through holes 56 a for the positive electrode terminal 32 a and three through holes 56 b for the negative electrode terminal 32 b are opened, along the longitudinal direction of the upper case 18. And arranged in a line with the through holes 56b of the bus bar mounting chamber 72b. In the bus bar mounting chamber 70, the three through holes 56b for the negative electrode terminal 32b are positioned side by side in the width direction of the upper case 18 with respect to the three through holes 56a for the positive electrode terminal 32a. The three through holes 56b for the negative electrode terminal 32b are arranged at regular intervals along the longitudinal direction of the upper case 18, and are arranged in a line with the through holes 56a of the bus bar mounting chamber 68b.

  In the bus bar mounting chamber 70, a holding rib 67 projects from the upper surface of the upper case 18. The holding rib 67 is formed between the adjacent through holes 56 a and 56 b and extends in the longitudinal direction of the upper case 18. The holding rib 67 is formed at a lower height than the peripheral wall 18 a and the partition wall 62.

  As shown in FIGS. 2 and 4, two partition walls 62 extending between the peripheral wall 18 a and the partition wall 60 b are erected on the upper surface of the upper case 18. The partition wall 62 is formed at substantially the same height as the peripheral wall 18a and the partition wall 60b. By these peripheral wall 18a, partition wall 60b, and partition wall 62, three bus bar mounting chambers 74a, 74b, and 74c arranged in the longitudinal direction of the upper case 18 are arranged.

  In the bus bar mounting chamber 74a located on the front end wall 10a side, three through holes 56b for the negative electrode terminal 32b are opened and are arranged at regular intervals along the longitudinal direction of the upper case 18. A plurality of holding ribs 66 project from the upper surface of the upper case 18 in the bus bar mounting chamber 74a. The holding rib 66 is formed between adjacent through holes 56 b and extends in the width direction of the upper case 18. Each holding rib 66 is formed at a height lower than that of the partition wall 62.

  In the middle bus bar mounting chamber 74b and the bus bar mounting chamber 74c on the rear end wall 10b side, in order from the front end wall 10a side, three through holes 56a for the positive terminal 32a and three through holes for the negative terminal 32b. The openings 56b open and are arranged at regular intervals along the longitudinal direction of the upper case 18. A plurality of holding ribs 66 project from the upper surface of the upper case 18 in each of the bus bar mounting chambers 74a and 74b. The holding ribs 66 are respectively formed between the adjacent through holes 56 a and 56 b and extend in the width direction of the upper case 18. Each holding rib 66 is formed at a height lower than that of the partition wall 62.

  As shown in FIGS. 2 and 4, the bus bars are mounted in the plurality of bus bar mounting chambers formed in the upper case 18 as described above, and are connected to the electrode terminals of the single cell 12. In the present embodiment, four types of bus bars as connection fittings are used. That is, as shown in FIG. 2, FIG. 4, FIG. 10, FIG. 11, and FIG. 12, the positive electrode bus bar 76 having three positive electrodes 32a connected to the positive terminals 32a of the three single cells 12 and having a positive output end at one end. A negative electrode bus bar 77 connected to the negative electrode terminal 32b of the cell 12 and having a negative electrode side output end at one end, eight common bus bars 78 connecting the electrode terminals of the six single cells 12, respectively, and three bus bars were connected. A bus bar unit 80 is provided. The bus bars 76, 77, 78 and the bus bar unit 80 are formed by bending a metal plate made of a conductive material such as aluminum.

  As shown in FIG. 12A, the positive electrode bus bar 76 is formed in an elongated and substantially rectangular plate shape, and has three rectangular positive electrode openings 82a with which the positive electrode terminals 32a of the single cells 12 are respectively engaged. The three positive electrode openings 82 a are provided side by side in the longitudinal direction of the positive electrode bus bar 76 at a predetermined interval. In the positive electrode bus bar 76, portions located between the adjacent positive electrode openings 82a are each bent in a substantially U shape to form a bent portion 84 that can be elastically deformed in the longitudinal direction of the positive electrode bus bar. Each bent portion 84 is formed with a bent portion 84 that is elastically deformable in the longitudinal direction of the positive electrode bus bar. Each bent portion 84 is formed with a slit extending in the longitudinal direction of the positive electrode bus bar 76. The positive electrode bus bar 76 can be displaced along the longitudinal direction by the elastic deformation of the bent portions 84, and manufacturing errors, combination errors, and the like in this direction can be absorbed to some extent.

  One end edge 76a in the longitudinal direction of the positive electrode bus bar 76 is formed in a shape indicating the positive electrode terminal side, for example, an arc shape. The other end in the longitudinal direction is bent on the crank to form a positive output end 76b. The positive electrode bus bar 76 integrally has a connection piece 76c protruding from one side edge thereof.

  As shown in FIG. 12B, the negative electrode bus bar 77 is formed in an elongated and substantially rectangular plate shape, and has three rectangular negative electrode openings 82b with which the negative electrode terminals 32b of the single cells 12 are engaged. The three negative electrode openings 82 b are provided side by side in the longitudinal direction of the negative electrode bus bar 77 at a predetermined interval. In the negative electrode bus bar 77, the portions located between the adjacent negative electrode openings 82b are each bent in a substantially U shape to form a bent portion 84 that can be elastically deformed in the longitudinal direction of the positive electrode bus bar. Each bent portion 84 is formed with a slit extending in the longitudinal direction of the negative electrode bus bar 77. Due to the elastic deformation of these bent portions 84, the negative electrode bus bar 77 can be displaced along its longitudinal direction, and manufacturing errors, combination errors, etc. in this direction can be absorbed to some extent.

  One end edge 77a in the longitudinal direction of the negative electrode bus bar 77 is formed in a shape indicating the negative electrode terminal side, for example, a trapezoidal shape. The other end portion in the longitudinal direction is bent into a crank shape to form a negative electrode side output end portion 77b. The negative electrode bus bar 77 integrally has a connection piece 77c protruding from one end edge thereof.

  As shown in FIGS. 10 and 12 (c), each common bus bar 78 is formed in an elongated substantially rectangular plate shape, and has three rectangular positive electrode openings 82a with which the positive electrode terminals 32a of the single cells 12 are respectively engaged. Each has a rectangular negative electrode opening 82b with which the negative electrode terminal 32b of the single cell 12 is engaged. In correspondence with the positive electrode terminal 32a and the negative electrode terminal 32b, the positive electrode opening 82a is formed in a rectangular shape slightly larger than the negative electrode opening 82b. The three positive electrode openings 82 a and the three negative electrode openings 82 b are provided side by side at a predetermined interval in the longitudinal direction of the common bus bar 78. At this time, three positive electrode openings 82a are formed in a row, and three negative electrode openings 82b are arranged in a row.

  As shown in FIGS. 2, 4, 9, 10, and 11, in the common bus bar 78, the portions located between adjacent openings are each bent in a substantially U shape, and in the longitudinal direction of the common bus bar. A bent portion 84 that is elastically deformable is formed. Each bent portion 84 is formed with a slit extending in the longitudinal direction of the common bus bar. Due to the elastic deformation of these bent portions 84, the common bus bar 78 can be displaced along its longitudinal direction, and manufacturing errors, combination errors, etc. in this direction can be absorbed to some extent. The common bus bar 78 integrally has a connection piece 78a protruding from one side edge.

  In the common bus bar 78, one end edge 78a on the side where the positive electrode opening 82a is formed and the other end edge 78b on the side where the negative electrode opening 82b is formed are formed in different shapes. For example, one end edge 78a on the positive electrode opening 82a side is formed in an arc shape indicating the positive electrode side, and the other end edge 78b on the side where the negative electrode opening 82b is formed is a trapezoidal shape indicating the negative electrode side. Is formed. Thus, by making the shape of both end edges different, the positive-side end and the negative-side end of the common bus bar 78 can be easily distinguished, and when the common bus bar 78 is attached to the upper case 18, It can be easily mounted in the correct orientation.

  The positive electrode bus bar 76, the negative electrode bus bar 77, and the common bus bar 78 configured as described above are mounted in the corresponding bus bar mounting chambers and connected to the electrode terminals of the single cell 12. As shown in FIG. 2, the positive bus bar 76 is mounted in the bus bar mounting chamber 64 a adjacent to the positive output terminal 24. The positive bus bar 76 is held in a state of being positioned at a predetermined position with respect to the bus bar mounting chamber 64a by engaging the opening side of each bent portion 84 with a holding rib 66 protruding from the bus bar mounting chamber 64a. ing. Thereby, the positive electrode opening 82a of the positive electrode bus bar 76 is positioned in alignment with the through hole 56a corresponding to each of the upper case 18 side.

  The positive terminals 32a of the single cells 12 are respectively engaged with the three positive openings 82a of the positive bus bar 76, and are welded to the positive bus bar 76 by laser welding or the like. For welding, electron beam welding or resistance welding may be used instead of laser welding. As a result, the positive terminals 32 a of the three single cells 12 in one cell unit C are electrically connected to each other by the positive bus bar 76. The positive electrode side output end 76 a of the positive electrode bus bar 76 is engaged with the upper part of the peripheral wall 18 a of the upper case 18 and is exposed to the front end wall 10 a side of the housing member 10.

  The negative bus bar 77 is mounted in the bus bar mounting chamber 74 a adjacent to the negative output terminal 26. The negative electrode bus bar 77 is held in a state of being positioned at a predetermined position with respect to the bus bar mounting chamber 74a by engaging the opening side of each bent portion 84 with a holding rib 66 protruding from the bus bar mounting chamber 74a. Enter. Thereby, the negative electrode opening 82b of the negative electrode bus bar 77 is positioned in alignment with the corresponding through hole 56b on the upper case 18 side. The negative electrode terminal 32b of the single cell 12 is engaged with the three negative electrode openings 82b of the negative electrode bus bar 77, and is welded to the negative electrode bus bar 77 by laser welding or the like. Thereby, the negative electrode terminals 32 b of the three single cells 12 in the one cell unit C are electrically connected to each other by the negative electrode bus bar 77. The negative electrode side output end 77 a of the negative electrode bus bar 77 is engaged with the upper part of the peripheral wall 18 a of the upper case 18 and is exposed to the front end wall 10 a side of the housing member 10.

  As shown in FIGS. 2 and 10, the eight common bus bars 78 include bus bar mounting chambers 64b and 64c aligned with the positive electrode bus bar 76, bus bar mounting chambers 68a and 68b in the next row, and bus bars in the next row. Mounted in the mounting chambers 72a and 72b and the bus bar mounting chambers 74b and 74c aligned with the negative electrode bus bar 77, respectively.

  The common bus bars 78 mounted in the bus bar mounting chambers 64b and 64c and the bus bar mounting chambers 68a and 68b in the adjacent row are arranged with the negative edge 78b facing the front end wall 10a side of the housing member 10, respectively. Yes. These common bus bars 78 are held in a state of being positioned at predetermined positions with respect to each bus bar mounting chamber by engaging the opening side of each bent portion 84 with a holding rib 66 protruding from the bus bar mounting chamber. Has been. As a result, the negative electrode opening 82b and the positive electrode opening 82a of the common bus bar 78 are aligned with the corresponding through holes 56b and 56a on the upper case 18 side.

  The negative terminal is welded to the common bus bar 78 with the negative terminal 32 b of the single cell 12 engaged with the three negative openings 82 b of the common bus bar 78. Thereby, the negative terminals 32 b of the three single cells 12 in the one-cell unit C are electrically connected to each other by the common bus bar 78. Further, each positive terminal is welded to the common bus bar 78 in a state where the positive terminals 32 a of the single cells 12 of the adjacent cell units C are respectively engaged with the three positive openings 82 a of the common bus bar 78. Thereby, the positive terminals 32a of the three single cells 12 in one cell unit C are electrically connected to each other by the common bus bar 78, and further electrically connected to the negative terminals 32b of the single cells 12 of the adjacent cell unit C. Has been.

  The common bus bars 78 mounted in the bus bar mounting chambers 72a and 72b and the bus bar mounting chambers 74b and 74c in the adjacent row are arranged with the edge 78a on the positive electrode side facing the front end wall 10a side of the housing member 10, respectively. Yes. These common bus bars 78 are held in a state of being positioned at predetermined positions with respect to each bus bar mounting chamber by engaging the opening side of each bent portion 84 with a holding rib 66 protruding from the bus bar mounting chamber. Has been. Thereby, the negative electrode opening 82b and the positive electrode opening 82a of the common bus bar 78 are positioned in alignment with the corresponding through holes 56b and 56a on the upper case 18 side.

  Each positive terminal is welded to the common bus bar 78 with the positive terminal 32 a of the single cell 12 engaged with the three positive openings 82 a of the common bus bar 78. As a result, the positive terminals 32 a of the three single cells 12 in one cell unit C are electrically connected to each other by the common bus bar 78. In addition, each negative electrode terminal is welded to the common bus bar 78 in a state where the three negative electrode openings 82 b of the common bus bar 78 are engaged with the negative electrode terminals 32 b of the single cells 12 of the adjacent cell unit C, respectively. Thus, the negative terminals 32b of the three single cells 12 in one cell unit C are electrically connected to each other by the common bus bar 78, and further electrically connected to the positive terminals 32a of the single cells 12 of the adjacent cell unit C. Has been.

  On the other hand, as shown in FIGS. 2 and 11, the bus bar unit 80 is configured by connecting three bus bars 86 each having a rectangular plate shape. Each bus bar 86 has a positive electrode opening 82a formed at one end portion in the longitudinal direction and a negative electrode opening 82b formed at the other end portion in the longitudinal direction. A portion between the positive electrode opening 82 a and the negative electrode opening 82 b is bent into a U shape to form a bent portion 84. A slit extending in the longitudinal direction of the bus bar 86 is formed in the bent portion 84. Due to the elastic deformation of these bent portions 84, the bus bar 86 can be displaced along its longitudinal direction, and manufacturing errors, combination errors, etc. in this direction can be absorbed to some extent.

  The three bus bars 86 are provided side by side with a gap in the width direction, the bent portions 84 are aligned with each other, and the positive electrode openings 82a and the negative electrode openings 82b are aligned in two rows. The adjacent bent portions 84 are connected to each other by a bridge portion 88. Thereby, the three bus bars 86 are connected to each other and can be handled as one unit. Further, the bus bar 86 can be displaced along the width direction by elastic deformation of each bridge portion 88, and manufacturing errors, combination errors, etc. in this direction can be absorbed to some extent. One bus bar, for example, the middle bus bar 86 integrally has a connecting piece 86b protruding from the edge on the positive electrode side.

  The bus bar unit 80 is mounted in the bus bar mounting chamber 70 of the upper case 18. The bus bar unit 80 is held in a state positioned at a predetermined position with respect to the bus bar mounting chamber 70 by engaging the opening side of each bent portion 84 with a holding rib 67 protruding from the bus bar mounting chamber 70. ing. As a result, the positive electrode openings 82a of the bus bars 86 are aligned with the corresponding through holes 56a on the upper case 18 side, and the negative electrode openings 82b are aligned with the corresponding through holes 56b on the upper case 18 side. Yes.

  The positive terminals 32a of the single cells 12 are engaged with the three positive openings 82a of the three bus bars 86, respectively, and are welded to the bus bars 86 by laser welding or the like. Accordingly, the positive terminals 32 a of the three single cells 12 in the one cell unit C are electrically connected to each other by the bus bar unit 80. Further, the negative terminals 32 b of the single cells 12 of the adjacent cell units C are engaged with the three negative openings 82 b of the three bus bars 86, and the respective negative terminals are welded to the bus bar 86. Thus, the negative terminals 32b of the three single cells 12 in one cell unit C are electrically connected to each other by the bus bar unit 80, and further electrically connected to the positive terminals 32a of the single cells 12 of the adjacent cell unit C. Has been.

  As shown in FIGS. 1, 2, and 13, a rectangular plate-like terminal base 22 is attached to the outer surface side of the front end wall 10 a of the housing member 10. A positive output terminal 24 and a negative output terminal 26 are attached to the terminal base 22. The negative output terminal 26 includes a terminal base 26a formed in a plate shape from stainless steel or the like, a plate-shaped conductive terminal 26b formed from a metal having high conductivity such as copper, and disposed on the terminal base 26a. have.

  A stud bolt 26c functioning as a connecting portion is provided upright at the center lower portion of the terminal base 26a. For example, three screw holes are formed in the peripheral portion of the terminal base 26a, and two screw holes 107 are formed side by side at the upper end portion of the terminal base 26a. The conductive terminal 26b has a through hole 108 through which the stud bolt 26c is inserted, a through hole 109 formed in the lower end portion, and two through holes 110 formed in the upper end portion.

  The conductive terminal 26 b is disposed so as to overlap the terminal base 26 a with the stud bolt 26 c inserted into the through hole 108, and is screwed and fixed to the terminal base 26 a with a screw inserted through the through hole 109. The through holes 110 of the conductive terminal 26b are aligned with the screw holes 107 of the terminal base 26a, respectively.

  The terminal base 26 a to which the conductive terminal 26 b is fixed is disposed on the inner surface side of the terminal base 22, and is screwed and fixed to the terminal base 22 with two screws inserted from the outer surface side of the terminal base 22. As a result, the conductive terminal 26 b is sandwiched between the terminal base 26 a and the terminal base 22. The stud bolt 26 c protrudes outward through an opening 112 formed in the terminal base 22. A portion of the conductive terminal 26 b located around the stud bolt 26 c is exposed to the outside through the opening 112. The upper end portion of the conductive terminal 26 b including the through hole 110 is exposed to the outside through the opening 114 formed in the upper end portion of the terminal base 22.

  The positive output terminal 24 is configured similarly to the negative output terminal 26. That is, the positive electrode output terminal 24 includes a terminal base 24 a and a conductive terminal 24 b fixed to the terminal base 24 a, and the terminal base 24 a is fixed to the inner surface side of the terminal base 22 with screws. The stud bolt 24c of the terminal base 24a functioning as a connecting portion protrudes outward through an opening 116 formed in the terminal base 22, and a portion of the conductive terminal 24b located around the stud bolt 24c is passed through the opening 116. , Exposed outside. The upper end portion of the conductive terminal 24 b including the through hole 118 is exposed to the outside through the opening 120 formed in the upper end portion of the terminal base 22.

  The terminal base 22 to which the positive electrode output terminal 24 and the negative electrode output terminal 26 are attached is fixed to the front end wall 10a of the housing member 10 by, for example, a plurality of screws, and is in close contact with the entire surface of the housing member 10. The positive output terminal 24 is sandwiched between the terminal base 22 and the entire surface of the housing member 10, and the upper end of the positive output terminal 24 is between the positive output end 76 b of the positive bus bar 76 and the front surface of the housing member 10. It is inserted in between and overlaps with the positive electrode side output end portion 76b. The upper end portion of the positive electrode output terminal 24 is formed by a pair of screws screwed into the terminal base 24a through a pair of through holes formed in the positive electrode side output end portion 76b of the positive electrode bus bar 76 and the through holes 118 of the conductive terminal 24b. The positive side output end 76b is fixed with screws. Thus, the positive electrode output terminal 24 is electrically and mechanically connected to the positive electrode bus bar 76.

  The upper end portion of the negative electrode output terminal 26 is inserted between the negative electrode side output end portion 77b of the negative electrode bus bar 77 and the front surface of the housing member 10, and is positioned so as to overlap the negative electrode side output end portion 77b. The upper end portion of the negative electrode output terminal 26 is formed by a pair of screws screwed into the terminal base 26a through a pair of through holes formed in the negative electrode side output end portion 77b of the negative electrode bus bar 77 and the through holes 110 of the conductive terminal 26b. The negative output side end 77b is fixed with screws. Thereby, the negative electrode output terminal 26 is electrically and mechanically connected to the negative electrode bus bar 77.

  As described above, the positive output terminal 24 and the negative output terminal 26 can be attached to the common terminal base 22 to improve the assemblability. Each of the positive output terminal 24 and the negative output terminal 26 has a configuration in which a terminal base fixed to the terminal base 22 is interposed between the bus bar and the conductive terminal, and a connection stat bolt is provided on the terminal base. Thus, when the output harness or the like is attached to or detached from the stat bolt, the load acting on the conductive terminal and the bus bar can be reduced. Thereby, it becomes possible to prevent a deformation | transformation, damage, etc. of a conductive terminal and a bus-bar.

  As shown in FIGS. 1 and 2, the top cover 20 is formed in a rectangular plate shape having a size substantially equal to the planar shape of the housing member 10, and is provided to cover the plurality of bus bar mounting chambers of the upper case 18. . The top cover 20 has a peripheral edge portion and a central portion fixed to the peripheral wall and center rib of the upper case 18 by screws, for example, and is joined to the upper case 19 in a liquid-tight manner.

  According to the above embodiment, a secondary battery device with high safety can be provided even when the safety valve of the battery is opened and exhaust gas is generated.

  Furthermore, as a modification of the present embodiment, the exhaust passage may be installed away from the single cell. In this case, a pipe connecting the safety valve of the single cell and the exhaust passage is installed. For example, a T-shaped pipe including an exhaust flow path part and a pipe part connecting the exhaust flow path part and the safety valve may be installed. In this case, the catalyst body may be installed in a pipe portion that connects the exhaust flow path portion and the safety valve, may be installed in the exhaust flow channel portion, or may be installed in either.

  As a further modification of the present embodiment, an exhaust passage may be provided for each single cell. Such an exhaust flow path connects the safety valve of each single cell to the outside of the housing member, and is closed by, for example, a check valve. The exhaust passages extending from each single cell may be aggregated within the housing member or outside the housing member to form a collecting pipe. In this case, the catalyst body may be installed in each exhaust passage, or may be installed in a portion of the collecting pipe. When the catalyst body is installed in the collecting pipe portion, the catalyst body can be installed more easily at a lower cost.

  The modification as described above has an advantage that the single cells can be installed in an arbitrary arrangement.

  Furthermore, the aspect described in the first embodiment can be used in combination with the above two modifications.

  In any of the above embodiments, the safety valve installed in the single cell is not limited to the case where it is provided on the same surface as the positive and negative terminals, and the safety valve may be provided on a different surface from the positive and negative terminals. For example, it is preferable to provide on the bottom surface or short side surface of the single cell. Moreover, you may use combining the single cell from which the installation location of a safety valve differs. Moreover, you may equip each single cell with a some safety valve.

  Moreover, in the said 1st Embodiment, although the accommodating member was comprised from the upper case which comprises a box-shaped accommodation case and a ceiling wall, and a top cover, it is not limited to this. For example, the housing member includes a lower case that constitutes the bottom wall, an upper case that is provided facing the lower case and constitutes the ceiling wall, a frame-shaped center case that is joined between the lower case and the upper case, You may comprise from a top cover. The housing member is divided into a larger number of members. By assembling the housing member, the volume inside the housing member can be used effectively. The top cover has an arbitrary configuration, and a housing member that does not include the top cover can also be used.

(Second Embodiment)
The secondary battery device according to the second embodiment has the same configuration as that of the first embodiment, except that the method for installing the catalyst body in the secondary battery device of the first embodiment is changed.

  FIG. 14 is a view showing a cross section of the secondary battery device as in FIG. In the secondary battery device of the present embodiment, the catalyst body 101 is filled in the exhaust flow paths 92a and 92b. The catalyst body 101 can be the same as the catalyst body described in detail in the first embodiment. The catalyst body 101 is formed in substantially the same shape as the internal shape of the exhaust flow paths 92a and 92b, and is packed in the flow path.

  When gas is generated in the outer container 30 due to an abnormal mode of the single cell 12 and the internal pressure in the outer container rises to a predetermined value or more, the safety valve 36 is opened, and the gas is released to the outside through the safety valve 3. . In this case, the released gas passes through the first exhaust hole 57 and is discharged into one of the corresponding exhaust passages 92a and 92b. When the pressure in the exhaust passages 92a and 92b increases due to the discharge of gas, the check valves 96a and 96b are opened, and the gas in the exhaust passage is discharged to the outside through the second exhaust holes 94a and 94b. . At this time, the gas released from the single cell 12 passes through the catalyst body 101 until it is discharged to the outside through the second exhaust holes 94a and 94b, so that the gas contacts the catalyst body 101 for a longer time. Therefore, a gas such as carbon monoxide is more reliably oxidized.

  According to the above embodiment, a secondary battery device with high safety can be provided even when the safety valve of the battery is opened and exhaust gas is generated.

(Third embodiment)
The secondary battery device according to the third embodiment has the same configuration as that of the first embodiment except that the shape of the exhaust passage and the method of installing the catalyst body are changed.

  As shown in FIG. 15, the secondary battery device 300 of the third embodiment includes extending portions 98 a and 98 b in which part of the exhaust flow paths 92 a and 92 b extend to the outside of the housing member 10. End portions of the extending portions 98a and 98b are closed by check valves 99a and 99b.

  A catalyst body is installed inside the extension portions 98a and 98b of the exhaust passages 92a and 92b. The catalyst body is filled in at least a part of the inside of the extension portions 98a and 98b of the exhaust passages 92a and 92b so that the gas released to the outside through the extension portions 98a and 98b always passes through the catalyst body. Installed.

  The lengths of the extending portions 98a and 98b of the exhaust passages 92a and 92b may be appropriately selected depending on the usage state of the secondary battery device. For example, in the in-vehicle secondary battery device, the end portions of the extending portions 98a and 98b may be piped so as to communicate with the outside of the vehicle, and the gas released from the single cell 12 may be discharged to the outside of the vehicle.

  For example, in a vehicle-mounted secondary battery device, a plurality of secondary battery devices 300 may be used in combination as shown in FIG. In that case, the extended portions 98a, 98b of the exhaust passages 92a, 92b of the respective secondary battery devices are connected to the collecting pipe 104, and the gas released from the single cell 12 is collected and discharged outside the vehicle. Good. The catalyst body may be installed inside the extending portions 98 a and 98 b or inside the collecting pipe 104. The collecting pipe 104 is piped so that the end communicates with the outside of the vehicle, and the gas released from the single cell 12 is discharged outside the vehicle. The end of the collecting pipe 104 is closed by a check valve 106.

  By installing the catalyst body in the extension portions 98a and 98b of the exhaust passages 92a and 92b or in the collecting pipe 104, for example, the safety valve 36 of the single cell 12 is opened and the non-aqueous electrolyte in the single cell 12 is opened. It is possible to prevent the catalyst body from deteriorating even when the gas jumps out into the exhaust passages 92a and 92b. Moreover, since the installation location of the catalyst body is outside the housing member 10, the catalyst body can be installed more easily. In the case of an in-vehicle secondary battery device, since gas such as carbon monoxide is not discharged outside the vehicle, safety can be improved even in a narrow space such as a tunnel.

  Furthermore, as another modified example, the collecting pipe may be in direct communication with each secondary battery device without passing through the extending portion of the exhaust passage. Alternatively, the extended portions of the exhaust passages of the respective secondary battery devices may be individually communicated with the outside of the vehicle without being gathered. In this case, it has the advantage that a secondary battery apparatus can be installed in arbitrary arrangement | sequences.

  In any of the above aspects, the extended portion of the exhaust passage and the collecting pipe can be installed on any surface of the secondary battery device.

  According to the above embodiment, a secondary battery device with high safety can be provided even when the safety valve of the battery is opened and exhaust gas is generated.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

For example, the number of single cells constituting the cell unit is not limited to three, and may be two or four or more. Further, the number of cell units is not limited to 10 and can be increased or decreased as necessary. The positive electrode terminal and the negative electrode terminal of each single cell are not limited to a prismatic shape, and may have other shapes such as a cylindrical shape. The shape and material of the bus bar, and the shape and material of the housing member are not limited to the embodiment described above, and can be changed as appropriate.
[Appendix] The invention described in the claims at the beginning of the application will be added below.
[Item 1] A storage member having a storage case having an opening, an upper case attached to the opening of the storage case, and a plurality of units each having a safety valve and stored side by side in the storage member. A cell, a plurality of first exhaust holes formed in the upper case and facing the safety valve of each of the plurality of single cells, and formed in the upper case and communicated with the plurality of first exhaust holes. A secondary battery device comprising: an exhaust passage; and an oxidation catalyst that oxidizes gas exhausted from the safety valve of the single cell.
[Item 2] The secondary battery device according to Item 1, wherein the oxidation catalyst is disposed in the exhaust passage.
[Item 3] The secondary battery device according to Item 2, wherein each of the plurality of first exhaust holes is covered with a porous body containing the oxidation catalyst in the exhaust passage.
[Item 4] The secondary battery device according to Item 3, wherein the inside of the exhaust passage is filled with the oxidation catalyst.
[Item 5] The secondary battery device according to Item 4, wherein the oxidation catalyst is a catalyst that oxidizes carbon monoxide.
[Item 6] The secondary battery device according to Item 2, wherein a part of the exhaust passage has an extending part extending outside the housing member, and the oxidation catalyst is disposed in the extending part. .
[Item 7] The secondary battery device according to Item 6, wherein the oxidation catalyst is a catalyst that oxidizes carbon monoxide.

  DESCRIPTION OF SYMBOLS 10 ... Housing member, 12 ... Single cell, 14 ... Housing case, 18 ... Upper case, 20 ... Top cover, 22 ... Terminal base, 24 ... Positive electrode output terminal, 26 ... Negative electrode output terminal, 24a, 26a ... Terminal base, 24b , 26b ... conductive terminal, 24c, 26c ... stud bolt, 30 ... outer casing, 32a ... positive electrode terminal, 32b ... negative electrode terminal, 35 ... sealing material, 56a, 56b ... through hole, 57 ... first exhaust hole, 60a, 60b ... partition wall, 62 ... partition wall, 66 ... support rib, 64a, 64b, 64c, 68a, 68b, 70, 72a, 72b, 74a, 74b, 74c ... bus bar mounting chamber, 76 ... positive electrode bus bar, 77 ... negative electrode bus bar 78 ... Common bus bar, 80 ... Bus bar unit, 82a ... Positive electrode opening, 82b ... Negative electrode opening, 84 ... Bending part, 92a, 92b ... Exhaust gas Road, 94a, 94b ... second exhaust hole, 96a, 96b ... check valve, 98a, 98b ... exhaust channel extending portion, 100, 101 ... catalyst, 104 ... collecting pipe. 200, 300 ... Secondary battery device.

Claims (2)

A housing member having a housing case having an opening, and an upper case attached to the opening of the housing case;
A plurality of single cells each having a safety valve and housed side by side in the housing member;
A plurality of first exhaust holes formed in the upper case and facing the safety valves of each of the plurality of single cells;
An exhaust passage formed in the upper case and communicating with the plurality of first exhaust holes;
An oxidation catalyst that oxidizes the gas exhausted from the safety valve of the single cell,
The oxidation catalyst is a gold nanoparticle catalyst in which gold nanoparticles are supported on a metal oxide support,
The oxidation catalyst is disposed in the exhaust passage;
A secondary battery device in which each of the plurality of first exhaust holes is covered with a porous body containing the oxidation catalyst in the exhaust passage. The secondary battery device according to claim 1 , wherein an interior of the exhaust passage is filled with the oxidation catalyst.

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