WO2013073046A1 - 二次電池モジュール - Google Patents
二次電池モジュール Download PDFInfo
- Publication number
- WO2013073046A1 WO2013073046A1 PCT/JP2011/076626 JP2011076626W WO2013073046A1 WO 2013073046 A1 WO2013073046 A1 WO 2013073046A1 JP 2011076626 W JP2011076626 W JP 2011076626W WO 2013073046 A1 WO2013073046 A1 WO 2013073046A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell
- stacking direction
- width direction
- secondary battery
- battery module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a secondary battery module having a plurality of battery cells and capable of releasing and storing electric energy.
- Patent Document 1 discloses a structure of a metal band that fixes a stacked prismatic battery in a compressed state by connecting end portions to a pair of end plates disposed on both end faces of the stacked prismatic battery. ing.
- Patent Document 2 includes a laminated body in which a plurality of laminated batteries are sandwiched between a first sandwiching member and a second sandwiching member, and a fastening member formed in accordance with this dimension, and changes in dimensions due to deformation of the fastening member.
- the structure of the assembled battery structure for the purpose of the structure in which the occurrence of the occurrence of the battery is difficult is shown.
- the secondary battery module described in Patent Document 1 Since the secondary battery module described in Patent Document 1 has a stacked and compressed prismatic battery fastened with a metal band and fixed, when charging and discharging are repeated, a force accompanied by swelling of the battery cell is exerted. It will be received by the metal band, and a force perpendicular to the fastening direction will be applied constantly, that is, a repeated load will be applied to the metal band in the shear direction, and there is a possibility of loosening. The binding force cannot be maintained, and the battery performance may be deteriorated.
- the present invention has been made in view of the above points, and an object of the present invention is to fix a stacked square battery in an ideal state and to perform an assembling operation easily and to provide a redundant and reliable secondary battery module. Is to provide.
- the secondary battery module of the present invention is a secondary battery module having a cell block in which a plurality of rectangular batteries are stacked.
- a pair of end plates arranged to face one side and the other side of the cell block in the stacking direction, and to face one side and the other side of the cell width direction orthogonal to the stacking direction of the cell block, respectively.
- a pair of side frames having one end engaged with the end plate on one side in the stacking direction and the other end engaged with the end plate on the other side in the stacking direction on one side and the other side in the cell width direction, respectively. It is characterized by having.
- the secondary battery module of the present invention it is possible to fix a plurality of stacked rectangular batteries in an ideal state, to facilitate assembly work, and to prevent redundancy from decreasing over time, and to provide redundancy reliability. Obtainable. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.
- FIG. 8 is a cross-sectional view taken along line AA in FIG. 7.
- FIG. 8 is a sectional view taken along line BB in FIG.
- FIG. 1 is a perspective view showing an assembled state of a cell block
- FIG. 2 is a perspective view showing a state where one side frame is removed from the cell block
- FIG. 3 is a perspective view of an end plate
- FIG. 4 is a side frame.
- the cell block 11 is a main component constituting the secondary battery module 1 (see FIG. 15), and has a configuration in which a plurality of rectangular batteries 61 are stacked.
- the cell block 11 is secured in a stacked state by a pair of end plates 21 and 31 and a pair of side frames 41 and 51.
- the pair of end plates 21 and 31 are arranged to face the one side Df and the other side Dr in the stacking direction of the cell blocks 11, respectively.
- the pair of side frames 41 and 51 are disposed to face the one side Wl and the other side Wr, respectively, in the cell width direction orthogonal to the stacking direction of the cell blocks 11.
- the pair of side frames 41 and 51 are engaged with the end plate 21 on one side Df in the stacking direction on one side Wl and the other side Wr in the cell width direction, and the end plate 31 on the other side Dr in the stacking direction. And the other end is engaged.
- the end plates 21 and 31 are provided with projecting portions 22 and 32 that project to one side Wl and the other side Wr, respectively, in the cell width direction.
- the side frame 41 on the one side Wl in the cell width direction includes the protrusion 22 on the one side Wl in the cell width direction of the end plate 21 on the one side Df in the stacking direction and the other side Dr in the stacking direction.
- the end plate 31 has an opening extending between the protrusion 32 on one side Wl in the cell width direction, and the protrusions 22 and 32 on one end Wl in the cell width direction of the end plates 21 and 31 are respectively inserted.
- An opening 42 is provided.
- the side frame 51 on the other side in the cell width direction includes the protrusion 23 on the other side Wr of the end plate 21 on the one side Df in the stacking direction and the cell width direction on the end plate 31 on the other side Dr in the stacking direction.
- An opening 52 is provided between the protrusion 32 on the other side Wr and the protrusions 23 and 32 on the other side Wr in the cell width direction of the end plates 21 and 31 are respectively inserted.
- the protrusions 22, 32 on one side Wl in the cell width direction are inserted into the opening 42 of the side frame 41 on one side Wl in the cell width direction, and the protrusion 22 on the other side Wr in the cell width direction. 32 are inserted into the opening 52 of the side frame 51 on the other side Wr in the cell width direction, the movement of the end plates 21 and 31 in the direction away from each other in the stacking direction is restricted, and the cell block 11 is It is secured from both sides in the stacking direction.
- the end plate 21 (31) has a rectangular shape having a predetermined plate thickness and a rectangular shape having substantially the same size as the end face on one side or the other side in the stacking direction of the cell blocks 11.
- the end plate 21 (31) has protrusions 22 (32) that protrude to one side Wl and the other side Wr, respectively, in the cell width direction.
- the protrusion 22 (32) has a shape that extends along the cell height direction and has a protruding dimension substantially the same as the plate thickness of the side frames 41 and 51. And when it is inserted in the openings 42 and 52 of the side frames 41 and 51, it comes into contact with the edge portions 42 a and 52 a on one side in the stacking direction constituting the openings 42 and 52. .
- a locking hole 24 (34) and a screw hole (fastening hole) 26 (36) are provided on the outer end surface of the end plate 21 (31).
- the locking holes 24 (34) are used to engage the locking claws 44 and 54 of the side frames 41 and 51, and the screw holes 26 (36) are connected to the end frames 21 (31). This is for fastening the fixing screw 10 for fixing the screw.
- the two locking holes 24 (34) are provided in total so as to be located at both ends of the end plate 21 (31) in the cell width direction and at substantially the center position in the cell height direction.
- the locking hole 24 (34) is formed to be recessed in the outer end surface of the end plate 21 (31), and has a round hole shape having a predetermined depth.
- a total of four screw holes 26 (36) are provided so as to be located at both ends of the end plate 21 (31) in the cell width direction and at two positions, one side Hd and the other side Hu, in the cell height direction. It has been.
- the locking method may be a combination opposite to that described above.
- the latching claw (convex shape) is formed in the 24 (34) portion of the outer end surface of the end plate 21 (31), and the locking hole is formed in the 54 (44) portion of the side frames 41 and 51. May be.
- the side frame 51 (41) is made of a plate member having a substantially rectangular shape in plan view and facing the end face of the cell block 11 in the cell width direction on one side Wl or the other side Wr, and is slightly larger than the cell height of the cell block 11. It has a large constant height and a size extending between the pair of end plates 21 and 31.
- the side frame 51 (41) is provided with an opening 52 (42) that opens from one end to the other end with a constant height.
- the opening 52 (42) is formed in a rectangular shape along the shape of the side frame 51 (41) so that the end surface of the cell block 11 on the other side Wr in the cell width direction can be exposed.
- the opening 52 (42) includes an upper edge 52c (42c) and a lower edge 52d (42d) extending in parallel with each other between the one end and the other end, and the one end and the other end. And a pair of end edges 52a (42b) and 52b (42a) extending in parallel with each other along the height direction.
- the pair of edge portions 52a and 52b of the opening 52 are in contact with and opposed to the protrusions 22 and 32 on the other side Wr of the end plates 21 and 31 at the outer side in the stacking direction.
- the pair of edge portions 42a and 42b are configured to face and abut the protrusions 22 and 32 on one side Wl of the end plates 21 and 31 at the outer side in the stacking direction.
- the side frames 51 (41) are bent in the same direction at one end and the other end, respectively, so that the outer end surface of the end plate 21 on the one side Df in the stacking direction and the end plate 31 on the other side Dr in the stacking direction. It has a pair of flange 53 (43) which each faces an end surface.
- Each flange 53 (43) is provided with a pair of locking claws 54 (44) and 54 (44) which are engaged with the locking holes 24 and 34 of the end plates 21 and 31.
- Each latching claw 54 (44) protrudes in a short-axis columnar shape in a direction approaching each other from the surface facing the end plates 21 and 31, and the latching holes 24 (34) of each end plate 21 and 31 are provided. It has a size and shape that can be engaged with the.
- the side frames 51 (41) can be fixed to the end plates 21 and 31 by engaging the locking claws 54 (44) into the locking holes 24 (34).
- each flange 53 (43) is formed with a through hole 55 through which the fixing screw (fastening member) 10 is inserted.
- the through hole 55 (45) is arranged continuously to the screw holes 26 and 36 of the end plates 21 and 31 with the side frame 51 (41) attached, and is inserted into the fixing screw 10 from the outside in the stacking direction.
- the holes 26 and 36 are configured to be screwed.
- the method of fastening using the fixing screw 10 has been described, but it may be fastened and fixed using bolts, rivets, caulking, or the like.
- the side frames 41 and 51 and the end plates 21 and 31 are such that the protrusions 22 and 32 are first inserted into the openings 42 and 52, and the pair of end edges 42 a and 42 b of the opening 42 are the end plates.
- the pair of edge portions 52a and 52b of the opening 52 are in contact with the protrusions 22 and 32 on one side Wl of the cell width direction 21 and 31, and the protrusions on the other side Wr of the end plates 21 and 31 on the other side Wr.
- the parts 22 and 32 are engaged by being opposed to each other.
- the side frames 41 and 51 and the end plates 21 and 31 are fastened by the fixing screw 10, the side frames 41 and 51 can be securely fixed to the end plates 21 and 31. And even when the engagement of the protrusions 22 and 32 in the opening 52 is released for some reason, the cell block 11 can be secured and the stacked state can be maintained.
- the side frames 41 and 51 each have a pair of reinforcing flanges 46 and 56 extending along the upper end and the lower end, respectively, and have a substantially U-shaped cross section in the height direction.
- the reinforcing flanges 46 and 56 are formed by bending the flanges at the upper and lower ends of the side frames 41 and 51 in a direction away from the bending direction of the flanges 43 and 53.
- the reinforcing flanges 46 and 56 can improve the rigidity of the side frames 41 and 51, and can prevent the side frames 41 and 51 from being deformed. Therefore, it is possible to prevent the engagement with the protrusions 22 and 32 of the end plates 21 and 31 due to the twist of the side frames 41 and 51 or the like.
- the cross-sectional shape of the side frames 41 and 51 is not limited to the above-described example, and any shape that can improve the rigidity of the side frames 41 and 51 may be used.
- the cross section in which the reinforcing flange 46 at the lower end is omitted and only the reinforcing flange 46 at the upper end is omitted may have a substantially L shape, or the cross section may have a square pipe shape.
- the cell block 11 includes a plurality of prismatic batteries 61 and a cell holder that holds each prismatic battery 61.
- the cell holder is inserted into each of the openings 42 and 52 of the pair of side frames 41 and 51 and engaged with the pair of side frames 41 and 51 on one side Wl and the other side Wr of the cell block 11 in the cell width direction.
- Convex portions 84C and 94C are provided.
- the cell holder includes a pair of end cell holders 81, 81 interposed between the end plates 21, 31 and the prismatic battery 61, a prismatic battery 61 on one side Df in the stacking direction, and a prismatic battery 61 on the other side Dr in the stacking direction. And a plurality of intermediate cell holders 91 that can be connected in the stacking direction between the pair of end cell holders 81, 81.
- the prismatic battery 61 is held in a state of being sandwiched from both sides in the stacking direction by connecting the end cell holder 81, the intermediate cell holder 91, and the intermediate cell holder 91 to each other in the stacking direction.
- FIG. 5 is an external perspective view of the prismatic battery 61.
- the prismatic battery 61 is, for example, a lithium ion secondary battery, and the wound power generation element group is accommodated in a rectangular parallelepiped battery can 62 having an opening on one side via an insulating case, and an opening 62A of the battery can 62 is provided. It has a structure sealed with a battery lid 63.
- the battery can 62 and the battery lid 63 constitute a container exterior.
- a positive terminal 64 and a negative terminal 65 project from the battery lid 63.
- the positive electrode terminal 64 and the negative electrode terminal 65 are terminals for outputting the power generated by the wound power generation element group in the battery can 62 to the outside and charging the wound power generation element group with the power generated outside. .
- the battery can 62 is made of metal and has a depth dimension larger than the dimension of the short side of the opening by a deep drawing method.
- the battery can 62 is a flat container formed of a wide side surface 62W having a large area of a bottomed rectangular parallelepiped container, a narrow side surface 62N having a small area, and a bottom surface (can bottom surface) 62B which is a bottom surface of the container. It has a part 62A.
- the battery lid 63 is fixed to the opening 62A of the battery can 62 by a laser beam welding method.
- the battery lid 63 is formed with through holes through which the positive terminal 64 and the negative terminal 65 are inserted.
- the battery lid 3 is provided with a liquid injection port 63A and a safety valve 63B.
- the liquid injection port 63A is sealed by laser beam welding after the electrolytic solution is injected into the battery can 62.
- the safety valve 63B is configured to be cleaved when the pressure in the battery can 62 rises to a predetermined value or more and to release the pressure in the battery can 62.
- ⁇ Cell holder for intermediate> 6 is a perspective view of the intermediate cell holder
- FIG. 7 is a front view of the intermediate cell holder
- FIG. 8 is a cross-sectional view taken along line AA in FIG. 7
- FIG. 9 is a cross-sectional view taken along line BB in FIG.
- FIG. 10 is a perspective view illustrating an example of the connection structure of the intermediate cell holder.
- middle is the partition part 92 interposed between the wide side surface 62W of the square battery 61 of the lamination direction one side Df, and the wide side surface 62W of the square battery 61 of the lamination direction other side Dr, and the partition part 92 Between the wide side surface 62W of the prismatic battery 61 on one side Df in the stacking direction and the wide side surface 62W of the square battery 61 on the other side Dr in the stacking direction.
- a ventilation path 93 communicated in the cell width direction is provided.
- the ventilation path 93 is formed by cutting out the partition wall 92 in the cell width direction, the space between the square batteries 61 can be reduced, and the necessary flow rate of cooling air can be ensured. Therefore, the entire apparatus can be reduced in size. Further, since the ventilation path 93 is formed in a straight line, the cooling air can flow smoothly and high cooling efficiency can be obtained.
- middle protrudes from the cell width direction both ends of the partition part 92 to the lamination direction one side and the other side, and each opposes the narrow side surface 62N of each square battery 61 of the lamination direction one side Df and the other side Dr.
- a pair of side wall portions 94, 94, and a bottom surface of each rectangular battery 61 on one side Df and the other side Dr in the stacking direction project from one end in the cell height direction of the partition wall 92 to one side and the other side in the stacking direction. It has a bottom wall 95 facing 62B.
- Each side wall portion 94 is provided with an opening portion 94A communicating with the ventilation path 93, and cooling air is introduced into the ventilation path 93 from the opening portion 94A on one side in the cell width direction of the cell block 11, It passes between the rectangular batteries 61 arranged on one side and the other side in the stacking direction, and can flow out from the opening 94A on the other side in the cell width direction.
- the side wall portion 94 is provided with contact surface portions 94B and 94B that contact the side frames 41 and 51 at end positions on one side and the other side in the cell height direction. Protrusions 94C and 94C that are inserted into and engaged with the openings 42 and 52 of the frames 41 and 51 are provided.
- the contact surface portions 94B and 94B are in contact with the side frames 41 and 51, thereby restricting and sealing the movement of the intermediate cell holder 91 in the cell width direction.
- the protrusions 94C and 94C are inserted into the openings 42 and 52 of the side frames 41 and 51, the upper ends of the protrusions 94C and 94C are opposed to the upper ends 42c and 52c of the openings 42 and 52, and
- the lower end portions of the portions 94C and 94C face the lower end portions 42d and 52d of the opening portions 42 and 52, thereby restricting the movement of the intermediate cell holder 91 in the cell height direction.
- overlapping surface portions 94D and 94E are provided in which the end portions in the stacking direction overlap each other in the direction orthogonal to the stacking direction.
- the end cell holder 81 is connected to the intermediate cell holder 91 in the stacking direction.
- overlapping surface portions 95A and 95B are provided in which the end portions in the stacking direction overlap each other in the direction orthogonal to the stacking direction.
- FIG. 11 is a perspective view for explaining another example of the connection structure of the intermediate cell holder.
- Each of the intermediate cell holders 91 is provided with a pair of pedestal portions 96 for fixing the substrate to the upper end portion on the other side of the cell height of the partition wall portion 92.
- Each pedestal portion 96 is provided apart from each other in the cell width direction, and has a block shape having a substantially rectangular cross section and extending in the stacking direction.
- the pedestal portion 96 on one side W1 in the cell width direction has a cylindrical dowel 96a projecting on the end surface on one side in the stacking direction, and a dowel hole 96b on the end surface on the other side in the stacking direction. It has been drilled. Further, the pedestal portion 96 on the other side Wr in the cell width direction has a dowel hole 96b formed on one end face in the stacking direction, and a dowel 96a projecting on the other end face in the stacking direction.
- the dowel 96a and the dowel hole 96b are fitted to each other by connecting the intermediate cell holders 91 in the stacking direction. Therefore, the cell height direction other side Hu of the intermediate cell holder 91 can also be connected and fixed in the stacking direction. Therefore, the plurality of intermediate cell holders 91 can be easily stacked on each other, and the assembling work is facilitated.
- FIG. 12 is a perspective view illustrating a connection structure between the end plate and the end cell holder
- FIG. 13 is a cross-sectional view illustrating a connection state between the end plate and the end cell holder.
- the configuration of the end cell holder 81 on one side in the stacking direction will be described, and the description of the end cell holder 81 on the other side in the stacking direction will be omitted.
- the end cell holder 81 has a shape obtained by dividing the intermediate cell holder 91 into two at the center position in the stacking direction.
- the end cell holder 81 is formed by partitioning between the end plate 21 and the prismatic battery 61 and partitioning the partition 82, passing through the partition 82 in the stacking direction, and notching in the cell width direction.
- the cell holder 81 has a ventilation path 83 that communicates between one side and the other side in the cell width direction.
- the end cell holder 81 protrudes from the both ends of the partition wall portion 82 in the cell width direction to the other side in the stacking direction, and is opposed to the narrow side surface 62N of the prismatic battery 61 on the other side Dr in the stacking direction.
- the partition wall portion 82 has a bottom wall portion 85 protruding from one end in the cell height direction to the other side Dr in the stacking direction and facing the bottom surface 62B of the prismatic battery 61 on the other side Dr in the stacking direction.
- Each side wall 84 is formed with an opening 84A communicating with the ventilation path 83, and cooling air is introduced into the ventilation path 83 from the opening 84A on one side of the cell block 11 in the cell width direction. It passes between the rectangular batteries 61 arranged on the other side Dr in the stacking direction, and can flow out from the opening 94A on the other side Wr in the cell width direction.
- the side wall portion 94 is provided with contact surface portions 84B and 84B that are in contact with the side frames 41 and 51 at end positions on one side Hd and the other side Hu in the cell height direction, and at the center position in the cell height direction. Convex portions 84C and 84C that are inserted into and engaged with the openings 42 and 52 of the side frames 41 and 51 are provided.
- the contact surface portions 84B and 84B are in contact with the side frames 41 and 51, thereby restricting and sealing the movement of the end cell holder 81 in the cell width direction.
- Each convex portion 84C is inserted into the opening portions 42 and 52, whereby the upper end portion of each convex portion 84C faces the upper end portions 42c and 52c of the opening portions 42 and 52, and the lower end portion of each convex portion 84C. Faces the lower end portions 42d and 52d of the openings 42 and 52, and restricts the movement of the intermediate cell holder 91 in the cell height direction.
- the side wall portion 84 is provided with overlapping surface portions 84D and 84E in which the end portions in the stacking direction overlap each other in the direction perpendicular to the stacking direction when the intermediate cell holder 91 is connected in the stacking direction.
- the overlapping surface portions 85A and 85B overlap each other in the direction perpendicular to the stacking direction. Is provided.
- Positioning pins 87 for positioning with respect to the end plates 21 and 31 are projected from the outer surface of the end cell holder 81.
- the positioning pins 87 are arranged at diagonal positions on the outer surface of the end cell holder 81. Then, as shown in FIG. 13, the relative positioning can be performed by inserting into the positioning holes 27 recessed in the opposing surfaces of the end plates 21 and 31. 12 and 13, the configuration of the outer end portion of the end plate 21 is partially omitted.
- ⁇ Assembly method of secondary battery module> First, a predetermined number of intermediate cell holders 91 are prepared, and the prismatic battery 61 is sandwiched and held while being connected in the stacking direction. Then, the end cell holder 91 is connected to both ends in the stacking direction to form the cell block 11.
- the end plates 21 and 31 are arranged on both sides of the cell block 11 in the stacking direction, compressed in the stacking direction with a predetermined compressive force, and held in such a compressed state.
- the side frames 41 and 51 are approached from both sides of the cell block 11 in the cell width direction, and the projections 22 and 33 on one side Wl of the end plates 21 and 31 are connected to the side frames on one side Wl of the cell width direction.
- the protrusions 22 and 33 on the other side Wr of the end plates 21 and 31 are inserted into the openings 52 of the side frame 51 on the other side Wr of the cell width direction.
- the convex portions 84C and 84c of the end cell holder 81 and the convex portions 94C and 94C of the intermediate cell holder 91 are also inserted into the openings 42 and 52.
- the side frame 41 is fixed to the end plates 21 and 31 by engaging the locking claws 44 and 44 in the locking holes 24 and 34 of the end plates 21 and 31.
- the side frames 51 are fixed to the end plates 21 and 31 by engaging the locking claws 54 and 54 in the locking holes 24 and 34 of the end plates 21 and 31.
- the side frames 41 and 51 attached in a state where the cell block 11 is compressed in the stacking direction are in a compressed state. Before releasing, it can prevent coming off from the end plates 21 and 31, and an assembly operation can be made easy. Then, by attaching the fixing screw 10, the side frames 41 and 51 are fastened to the end plates 21 and 31, and the compression of the cell block 11 is released after fastening.
- the prismatic battery 61 is compressed in the elastic region and the projections 22 and 32 of the end plates 21 and 31 are engaged with the opening holes 42 and 52, so that they can be self-fastened and assembled. Can be made easier. Moreover, compared with the conventional method of fixing with a band, it is possible to maintain an appropriate securing force without loosening.
- the cell block 11 is provided with a gas discharge passage 101, a control circuit board 111, and a cover member 121 on the other side Hu in the cell height direction. Then, as shown in FIG. 15, the intake duct 141 is connected to one side Wl in the cell width direction, and the exhaust duct 131 is connected to the other side Wr in the cell width direction, so that the secondary battery module 1 is assembled. .
- the intake duct and the exhaust duct may be in the opposite combination, and do not limit the direction of air inflow.
- the cooling plate in which the cooling liquid circulates is disposed to face one side Hd in the cell height direction of the cell block 11 shown in FIG.
- the cell holder 91 does not have the bottom wall portion 95, and the can bottom 62B of the square battery 61 and the cooling plate are thermally coupled.
- a structure in which a thermally conductive sheet is interposed between the can bottom 62B of the square battery 61 and the cooling plate may be employed.
- the cooling plate is attached in a state of being pressed against the cell block 11 by a clip which is an elastic member. The clip presses the cooling plate against the cell block 11 with a predetermined pressing force by elastic deformation.
- the secondary battery module 1 may have a configuration in which a pair of cell blocks 11 are arranged in a posture state in which one side in the cell height direction faces each other and a cooling plate is interposed between the pair of cell blocks. According to this, the pair of cell blocks 11 can be simultaneously cooled with one cooling plate, and the entire module can be reduced in size and energy can be saved.
- the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.
- the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.
- a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.
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Abstract
Description
次に、エンドプレート21、31の構成について図3を用いて説明する。なお、エンドプレート31については、エンドプレート21と同一の構成を有しているので、対応する構成の符号をかっこ書きで示すことにより、その詳細な説明は省略する。
次に、サイドフレーム41、51の構成について図4を用いて説明する。なお、以下の説明では、サイドフレーム51の構成についてのみ説明し、サイドフレーム41の構成については、サイドフレーム51と同一であるので、対応する構成の符号をかっこ書きで示すことにより、その詳細な説明は省略する。
次に、セルブロック11の構成について説明する。
図5は、角形電池61の外観斜視図である。
図6は、中間用セルホルダの斜視図、図7は、中間用セルホルダの正面図、図8は、図7のA-A線断面図、図9は、図7のB-B線断面図、図10は、中間用セルホルダの連結構造の一例を説明する斜視図である。
図12は、エンドプレートとエンド用セルホルダとの連結構造を説明する斜視図、図13は、エンドプレートとエンド用セルホルダとの連結状態を示す断面図である。なお、以下の説明では、積層方向一方側のエンド用セルホルダ81の構成について説明し、積層方向他方側のエンド用セルホルダ81については、説明を省略する。
まず、所定数の中間用セルホルダ91を用意して、互いに積層方向に連結しながら、間に角形電池61を挟み込み、保持させる。そして、積層方向両端部にエンド用セルホルダ91を連結して、セルブロック11を形成する。
10 固定ネジ(締結部材)
11 セルブロック
61 角形電池
21、31 エンドプレート
22、32 突起部
24、34 係止穴
41、51 サイドフレーム
42、52 開口部
43、53 フランジ
44、54 係止爪
81 エンド用セルホルダ
82 隔壁部
91 中間用セルホルダ
92 隔壁部
Claims (14)
- 複数の角形電池が積層されたセルブロックを有する二次電池モジュールであって、
前記セルブロックの積層方向一方側と他方側にそれぞれ対向して配置される一対のエンドプレートと、
前記セルブロックの積層方向に直交するセル幅方向一方側と他方側にそれぞれ対向して配置されて、該セル幅方向一方側と他方側において、それぞれ、前記積層方向一方側のエンドプレートに一方端部が係合されかつ前記積層方向他方側のエンドプレートに他方端部が係合される一対のサイドフレームと、
を有することを特徴とする二次電池モジュール。 - 前記各エンドプレートは、前記セル幅方向一方側と他方側にそれぞれ突出する突起部を有しており、
前記一対のサイドフレームのうち、前記セル幅方向一方側のサイドフレームは、前記積層方向一方側のエンドプレートが有する前記セル幅方向一方側の突起部と、前記積層方向他方側のエンドプレートが有する前記セル幅方向一方側の突起部との間に亘って開口して、前記各エンドプレートの前記セル幅方向一方側の突起部がそれぞれ挿入される開口部を有し、
前記セル幅方向他方側のサイドフレームは、前記積層方向一方側のエンドプレートが有する前記セル幅方向他方側の突起部と、前記積層方向他方側のエンドプレートが有する前記セル幅方向他方側の突起部との間に亘って開口して、前記各エンドプレートの前記セル幅方向他方側の突起部がそれぞれ挿入される開口部を有することを特徴とする請求項1に記載の二次電池モジュール。 - 前記各サイドフレームは、前記一方端部と前記他方端部でそれぞれ同方向に向かって折曲されて前記積層方向一方側のエンドプレートの外端面と前記積層方向他方側のエンドプレートの外端面にそれぞれ対向する一対のフランジを有する請求項2に記載の二次電池モジュール。
- 前記エンドプレートの外端面と、該外端面に対向する前記フランジとのいずれか一方には前記積層方向に突出する係止爪が設けられており、いずれか他方には前記積層方向に凹陥して前記係止爪が係入される係止穴が設けられていることを特徴とする請求項3に記載の二次電池モジュール。
- 前記サイドフレームのフランジには、締結部材が挿通される貫通穴が前記積層方向に沿って貫通して形成されており、
前記エンドプレートの外端面には、前記フランジの貫通穴に挿通された前記締結部材が締結される締結穴が設けられていることを特徴とする請求項3に記載の二次電池モジュール。 - 前記サイドフレームは、断面L字型、断面コ字型、断面角パイプ型を有していることを特徴とする請求項1から請求項5のいずれか一項に記載の二次電池モジュール。
- 前記セルブロックは、前記角形電池を保持するセルホルダを有しており、
該セルホルダは、前記セルブロックのセル幅方向一方側と他方側において、前記一対のサイドフレームの各開口部にそれぞれ挿入されて前記一対のサイドフレームに係合される一対の凸部を有することを特徴とする請求項1に記載の二次電池モジュール。 - 前記セルホルダは、
前記各エンドプレートと前記角形電池との間にそれぞれ介在される一対のエンド用セルホルダと、
前記積層方向一方側の角形電池と積層方向他方側の角形電池との間に介在されて、前記一対のエンド用セルホルダの間で前記積層方向に複数連結可能な中間用セルホルダと、
を有し、
前記エンド用セルホルダと前記中間用セルホルダ、及び、前記中間用セルホルダ同士を互いに積層方向に連結することによって前記角形電池を積層方向両側から挟み込んで保持することを特徴とする請求項7に記載の二次電池モジュール。 - 前記中間用セルホルダは、
前記積層方向一方側の角形電池と積層方向他方側の角形電池との間に介在されて区画する隔壁部と、
該隔壁部を積層方向に貫通して前記セル幅方向に亘って切り欠き形成されて、前記中間用セルホルダのセル幅方向一方側と他方側との間を連通する通気パスと、
を有することを特徴とする請求項8に記載の二次電池モジュール。 - 前記エンド用セルホルダは、
前記エンドプレートと前記角形電池との間に介在されて区画する隔壁部と、
該隔壁部を積層方向に貫通して前記セル幅方向に亘って切り欠き形成されて、前記エンド用セルホルダのセル幅方向一方側と他方側との間を連通する通気パスと、
を有することを特徴とする請求項8または請求項9に記載の二次電池モジュール。 - 前記エンド用セルホルダ及び前記中間用セルホルダは、前記エンド用セルホルダと前記中間用セルホルダ、及び、前記中間用セルホルダ同士を互いに積層方向に連結した場合に、互いの積層方向端部が前記積層方向に直交する方向に互いに重なり合う重なり面部を有することを特徴とする請求項8から請求項10のいずれか一項に記載の二次電池モジュール。
- 前記セルブロックの積層方向に直交するセル高さ方向一方側に対向して配置されて、冷却媒体の供給により冷却される冷却プレートを有することを特徴とする請求項1から請求項11のいずれか一項に記載の二次電池モジュール。
- 弾性変形により前記セルブロックに前記冷却プレートを押圧する弾性部材を有することを特徴とする請求項12に記載の二次電池モジュール。
- 前記セルブロックが対をなして前記セル高さ方向一方側同士が互いに対向する姿勢状態に配置されており、該一対のセルブロックの間に前記冷却プレートが介在されていることを特徴とする請求項12または請求項13に記載の二次電池モジュール。
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| PCT/JP2011/076626 WO2013073046A1 (ja) | 2011-11-18 | 2011-11-18 | 二次電池モジュール |
| EP11875695.6A EP2782161B1 (en) | 2011-11-18 | 2011-11-18 | Secondary cell module |
| US14/358,924 US9634302B2 (en) | 2011-11-18 | 2011-11-18 | Secondary battery module |
| JP2013544069A JP5823532B2 (ja) | 2011-11-18 | 2011-11-18 | 二次電池モジュール |
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| US (1) | US9634302B2 (ja) |
| EP (1) | EP2782161B1 (ja) |
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| WO (1) | WO2013073046A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2782161A1 (en) | 2014-09-24 |
| EP2782161B1 (en) | 2019-05-01 |
| JP5823532B2 (ja) | 2015-11-25 |
| EP2782161A4 (en) | 2015-12-09 |
| JPWO2013073046A1 (ja) | 2015-04-02 |
| US20140295227A1 (en) | 2014-10-02 |
| US9634302B2 (en) | 2017-04-25 |
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