WO2014065007A1 - 蓄電モジュール - Google Patents
蓄電モジュール Download PDFInfo
- Publication number
- WO2014065007A1 WO2014065007A1 PCT/JP2013/073488 JP2013073488W WO2014065007A1 WO 2014065007 A1 WO2014065007 A1 WO 2014065007A1 JP 2013073488 W JP2013073488 W JP 2013073488W WO 2014065007 A1 WO2014065007 A1 WO 2014065007A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- holding member
- heat transfer
- power storage
- transfer plate
- case
- Prior art date
Links
- 238000003860 storage Methods 0.000 title claims abstract description 51
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 16
- 230000017525 heat dissipation Effects 0.000 description 11
- 239000005001 laminate film Substances 0.000 description 9
- 238000003466 welding Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- -1 nickel metal hydride Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Images
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
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- 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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
-
- 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
- H01M10/6555—Rods or plates arranged between the cells
-
- 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
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- 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
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic material
-
- 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
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0472—Vertically superposed cells with vertically disposed plates
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0486—Frames for plates or membranes
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a power storage module.
- Secondary batteries such as lithium ion batteries and nickel metal hydride batteries are known as examples of power storage elements in which power storage elements are housed.
- Secondary batteries such as a lithium ion battery, comprise a battery module by connecting two or more.
- a battery module for example, a battery module described in Patent Document 1 is known.
- Patent Document 1 JP 2006-210312 A
- Patent Document 1 discloses a battery module formed by stacking a plurality of unit cells from which positive and negative lead terminals protrude from the end. In this battery module, adjacent unit cells are connected in series by connecting lead terminals having different polarities (reverse polarities).
- the present invention has been completed based on the above circumstances, and an object thereof is to provide a power storage module having improved heat dissipation.
- a configuration in which a thermally conductive plate material such as a metal plate is disposed between adjacent power storage elements in the stacking direction can be considered, but if the metal plate is simply sandwiched between the power storage elements, There was concern about the occurrence of a short circuit due to contact between the metal plate and the lead terminal of the power storage element.
- a member (insulating member) made of an insulating material is used for the portion where the lead terminal is arranged, and the thermal conductivity is used for the portion where the power storage element body is arranged.
- the structure using the member (thermal conduction member) which consists of material was examined.
- the insulating member and the heat conducting member are separately (separately) arranged in the power storage element, the member is displaced due to vibration or the like, and there is a concern about occurrence of a short circuit due to contact between the heat conducting member and the lead terminal or the like. Therefore, it is preferable to prevent the insulating member and the heat conducting member from being displaced as a unit.
- At least the lead terminal projects out of a laminated body formed by laminating a plurality of power storage elements having positive and negative lead terminals protruding outward from the end portions, and the end portions of the power storage elements.
- Thermal conductivity that is mounted between the holding member made of an insulating resin that is attached to the end and holds the power storage element and the power storage element adjacent in the stacking direction and conducts heat generated in the power storage element to the outside
- a heat transfer plate made of a material, one of the holding member and the heat transfer plate is provided with an engaging portion, and the other is provided with an engaged portion that is engaged with the engaging portion.
- the holding member and the heat transfer plate material are integrated by engaging the engaging portion and the engaged portion with each other.
- the heat transfer plate member and the holding member are integrated by engaging the engaging portion provided on one side and the engaged portion provided on the other side. If the engaged portion is engaged with the engaged portion provided on the other member, the heat transfer plate member and the holding member can be integrated. As a result, according to the present invention, it is possible to provide a power storage module with improved heat dissipation while preventing a short circuit due to contact with a lead terminal or the like.
- the present invention may have the following configurations.
- the holding member may be formed with a slide portion for slidingly mounting the heat transfer plate material. With such a configuration, the efficiency of the work of integrating the heat transfer plate material and the holding member is further improved.
- a plurality of the engaging parts and the engaged parts may be provided, and may be provided at opposing positions.
- the heat transfer plate material is attached to the holding member at a plurality of positions at opposing positions, so that the displacement of the member is reliably prevented.
- a case that accommodates the laminate, the holding member, and the heat transfer plate, and the heat transfer plate is in contact with the inner wall surface of the case and conducts heat generated in the power storage element to the case.
- a heat conducting wall may be provided.
- a power storage element disposed at an end in the stacking direction may be disposed so as to be in contact with the inner wall surface of the case.
- a power storage module with improved heat dissipation can be provided.
- FIG. 1 is a perspective view of a power storage module according to the first embodiment.
- FIG. 2 is a perspective view of the laminate.
- FIG. 3 is a plan view of the laminate.
- FIG. 4 is a side view of the laminate.
- FIG. 5 is a cross-sectional view taken along line AA in FIG.
- FIG. 6 is a drawing in which a case is combined with the cross-sectional view taken along the line BB of FIG.
- FIG. 7 is a front view of the laminate.
- FIG. 8 is a cross-sectional view taken along the line CC of FIG.
- FIG. 9 is a plan view of the battery unit.
- 10 is a cross-sectional view taken along the line DD of FIG.
- FIG. 11 is a plan view of the battery unit.
- FIG. 12 is a cross-sectional view taken along line EE in FIG.
- FIG. 13 is a perspective view showing a state in which the heat transfer plate is attached to the holding member from the back side.
- FIG. 14 is an enlarged perspective view of a main part of FIG.
- FIG. 15 is a perspective view showing a state where the heat transfer plate is attached to the holding member from the back side.
- FIG. 16 is an enlarged perspective view of a main part of FIG.
- FIG. 17 is a plan view showing a state where the detection terminals are arranged on the holding member to which the heat transfer plate is attached.
- FIG. 18 is a plan view showing a state in which the detection terminal and the connection member are arranged on the holding member to which the heat transfer plate is attached.
- FIGS. 1 A first embodiment in which the present invention is applied to a battery module 10 will be described with reference to FIGS.
- the left side in FIG. 4 is the front
- the right side is the rear
- the upper side in FIG. 4 is the upper side
- the lower side is the lower side.
- the battery module 10 of the present embodiment is used as, for example, a battery module 10 for an integrated starter generator (ISG).
- ISG integrated starter generator
- the battery module 10 has a substantially rectangular parallelepiped shape as a whole.
- a plurality of electric wires 65 connected to the lead terminals 34 of each unit cell 32 are respectively connected to the outside from the front side surface and rear side surface (surfaces arranged on the left and right in FIG. 1) of the battery module 10 Has been derived.
- One end of each of the plurality of electric wires 65 is connected to the lead terminal 34 of the unit cell 32 via the plate-shaped voltage detection terminal 66, and the other end is connected to a voltage detection output connector 64 (hereinafter referred to as “connector 64”).
- connector 64 a voltage detection output connector 64
- the plurality of connectors 64 connected to the electric wires 65 led out to the front side surface and the plurality of connectors 64 connected to the electric wires 65 led out to the rear side surface are respectively laminated and integrated.
- the battery module 10 is attached to a stacked body 30 formed by stacking a plurality of unit cells 32 (six unit cells 32 in the present embodiment) and to both ends of each unit cell 32.
- the case 11 includes a case main body 12 that houses the stacked body 30 and a lid portion 18 that covers the upper surface of the case main body 12.
- the case body 12 has an upper surface and a front side surface that are open. At the upper end of the rear side surface of the case body 12, a wire lead-out hole (not shown) for leading the plurality of wires 65 out of the case 11 is formed.
- An insulating lid member 26 is attached to the front opening of the case body 12.
- the lid portion 18 includes a substantially rectangular plate-like portion 19, and a fixing portion 23 that is connected substantially vertically downward to the plate-like portion 19 and is fixed to the upper end portion of the case body 12.
- a projecting surface 20 that projects inward (downward) is formed at the center of the plate-like portion 19.
- the protruding surface 20 of the lid portion 18 can be brought into contact with the uppermost unit cell 32 (the first step from the top). When the projecting surface 20 of the lid portion 18 and the unit cell 32 come into contact with each other, heat generated from the unit cell 32 is transmitted to the lid unit 18 and is radiated to the outside.
- a fixing hole 21 in which a first fixing member (not shown) for fixing the lid portion 18, the laminated body 30, and the case main body 12 is disposed outside the protruding surface 20. Is formed through.
- the hole diameter of the fixing hole 21 is smaller than the outer diameter of the first fixing member.
- a rectangular hole 22 is formed through the front end portion side.
- the hole 22 serves as a lid locking hole 22 for locking an insulating lid member 26 attached to the front side.
- the fixing portion 23 has a substantially circular shape, and a plurality (three) of insertion holes 24 through which a second fixing member (not shown) for fixing the lid portion 18 to the case body 12 can be inserted.
- the fixing portion 23 is overlaid on a pair of side surfaces (surfaces disposed on the front side and the back side in FIG. 1) and the outer side of the rear side surface of the case body 12.
- bus bar outlets 29B and 29B from which the bus bar 38 is led out are formed.
- a substantially rectangular notch 29 ⁇ / b> A for leading out the plurality of electric wires 65 is provided at the lower end of the insulating lid member 26.
- the insulating lid member 26 has a function of not only covering the opening of the case body 12 but also insulating and protecting the lead terminal 34 disposed on the front end face side of the stacked body 30.
- the case 11 houses a stacked body 30 formed by stacking a plurality of unit cells 32.
- the stacked body 30 is formed by stacking a plurality of unit cells 32 (hereinafter referred to as “battery units 31”) placed on a heat transfer plate 60 to which the holding member 40 is attached.
- the unit cell 32 As shown in FIG. 3, in the battery unit 31, the unit cell 32 having a substantially rectangular shape when viewed from above has a pair of edges in the short side direction held by the holding member 40 and heat transfer attached to the holding member 40. It is placed on the plate 60.
- FIG. 9 is a diagram showing the battery unit 31 in the third stage from the top
- FIG. 11 is a diagram showing the battery unit 31 in the sixth stage from the top
- FIG. 17 is the battery in the third stage from the top.
- FIG. 18 is a diagram illustrating an assembly procedure of the unit 31, and FIG. 18 is a diagram illustrating an assembly procedure of the battery unit 31 in the sixth stage from the top.
- each single battery 32 is arranged substantially in parallel with the surface 33 ⁇ / b> A having a large area among the outer surfaces arranged vertically.
- the surface 33A having a large area comes into contact with the heat transfer plate 60 and is excellent in heat dissipation.
- the unit cells 32 that are adjacent in the stacking direction are arranged so that the lead terminals 34 having different polarities face each other.
- Each cell 32 is a laminate type battery.
- Each cell 32 includes a power generation element (not shown), a laminate film 33 that encloses the power generation element and has an end 33B welded thereto, and opposite end portions 33B and 33B that are connected to the power generation element and have the laminate film 33 welded thereto. And a lead terminal 34 protruding outward.
- the lead terminals 34 and 34 having different polarities of the adjacent unit cells 32 and 32 are opposite to each other except for the negative electrode lead terminal 34 of the first-stage unit cell 32 from the top and the positive electrode lead terminal 34 of the sixth stage from the top. And are connected by overlapping and welding so that the end portions are in contact with each other (see FIG. 7).
- the lead terminal 34 ⁇ / b> B protruding outward from one end 33 ⁇ / b> B of the unit cell 32 is bent substantially vertically upward after passing through the side-arc-shaped protrusion 36.
- the end portion has a J-shape when viewed from the side.
- a lead terminal 34B (not shown) protruding from the other end portion 33B is bent substantially vertically downward after passing through a projecting portion 36 having a side view arc shape, and the end portion has a J-shape in side view. Yes.
- the lead terminals 34B projecting outward from one edge 33B of the cells 32 arranged in the second to fifth stages from the top, and projecting outward from the other edge 33B.
- the lead terminals 34B are bent in opposite directions.
- Lead terminals 34A other than the lead terminal 34B (terminal connection terminal 34B) connected to the lead terminal 34B of the adjacent unit cell 32 (the first negative lead terminal 34A from the top and the sixth positive lead lead terminal 34A from the top).
- Terminal connection terminal 34B is formed with U-shaped protrusions 35 when viewed from the side, and in these terminals, portions (ends) closer to the ends than the U-shaped protrusions 35 are substantially parallel to the protruding direction (straight lines). State).
- lead terminals 34A (the negative electrode lead terminal 34A of the unit cell 32 at the first stage from the top and the positive electrode lead terminal 34A of the unit cell 32 at the sixth stage from the top) are directly superimposed on the voltage detection terminal 66 and the bus bar 38. Connected (bus bar connection terminal 34A). Although not shown in detail, the negative lead terminal 34 of each unit cell 32 is directly overlapped with and connected to the voltage detection terminal 66.
- the arc-shaped protrusion 36 formed on the lead terminal 34B has a function of relieving the stress received by the lead terminal 34B when welding the lead terminals 34B and 34B.
- the U-shaped protrusion 35 formed on the lead terminal 34A has a function of relieving stress applied to the lead terminal 34A when the lead terminal 34A and the bus bar 38 are connected.
- each lead terminal 34 protrudes in the vertical direction between the end 33 ⁇ / b> B of the laminate film 33 and the protrusions 35 and 36, and is engaged with the holding member 40.
- a stop convex portion 37 is formed.
- a region 34 a on the end 33 B side of the laminate film of the lead terminal 34 is a wide region 34 a wider than the region 34 b on the end side, and a corner 34 c of the wide region 34 a is formed on the unit cell holding portion 51 of the holding member 40.
- the movement of the unit cell 32 is regulated by fitting.
- bus bar 38 The bus bar 38 (second bus bar 38B) connected to the uppermost unit cell 32 is a terminal 38B that functions as the negative electrode of the battery module 10, and the bus bar 38 connected to the lowermost unit cell 32 is connected to the battery module 10. This is a terminal 38A (first bus bar 38A) that functions as a positive electrode.
- Each bus bar 38 is made of a conductive material such as pure aluminum, aluminum alloy, copper or copper alloy, and a portion 39 led out from the bus bar lead-out port 29B of the insulating lid member 26 is a terminal portion 39 connected to an external device. .
- Each unit cell 32 is held in a state of being placed on the heat transfer plate 60 by a holding member 40 made of an insulating resin.
- the holding members 40 are respectively disposed at both ends of the unit cell 32.
- one holding member 40 is formed with a locking claw 41A that protrudes toward the other holding member 40 and protrudes inward.
- a protrusion 41 is provided, and the other holding member 40 has a recessed shape for receiving the engagement protrusion 41 and an engagement receiving portion 42 formed with a locking protrusion 42A for locking the locking claw 41A.
- the engaging protrusion 41 and the engagement receiving portion 42 are structured to engage with each other.
- the holding members 40, 40 that are adjacent in the vertical direction are engaged at two locations. Specifically, it is as follows.
- Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40B disposed in front of the second stage from the top, while the two side surfaces of the holding member 40A disposed in front of the first stage from the top. Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40B in the second stage from the top (see FIGS. 4 and 5).
- Two engaging protrusions 41 are provided on the front side surface of the holding member 40C arranged in front of the third step from the top, while the front side surface of the holding member 40B arranged in front of the second step from the top. Is provided with an engagement receiving portion 42 that mutually engages with each of the engagement protrusions 41 provided on the holding member 40C in the third step from the top (see FIGS. 7 and 8).
- Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40D arranged in front of the fourth step from the top, while the two side surfaces of the holding member 40C arranged in front of the third step from the top Are provided with engagement receiving portions 42 that are engaged with the engagement protrusions 41 provided on the holding member 40D in the fourth stage from the top (see FIGS. 4 and 5).
- Two engaging protrusions 41 are provided on the front side surface of the holding member 40E arranged in front of the fifth step from the top, while on the front side surface of the holding member 40D arranged in front of the fourth step from the top. Is provided with an engagement receiving portion 42 that mutually engages with each of the engagement protrusions 41 provided on the holding member 40E in the fifth step from the top (see FIGS. 7 and 8).
- Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40F arranged in front of the sixth step from the top, while the two side surfaces of the holding member 40E arranged in front of the fifth step from the top Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40F in the sixth step from the top (see FIGS. 4 and 5).
- Two engaging protrusions 41 are provided on the rear side surface of the holding member 40H arranged at the rear of the second stage from the top, while on the rear side surface of the holding member 40G arranged at the rear of the first stage from the top. Is provided with an engagement receiving portion 42 that mutually engages with each of the engaging protrusions 41 provided on the holding member 40H at the second stage from the top (see FIG. 8).
- Engaging protrusions 41 are provided on the two side surfaces of the holding member 40I arranged at the rear of the third step from the top, respectively, while the two side surfaces of the holding member 40H arranged at the rear of the second step from the top are provided. Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40I at the rear of the third row from the top (see FIG. 4).
- Two engaging protrusions 41 are provided on the rear side surface of the holding member 40J arranged at the rear of the fourth stage from the top, while the rear side surface of the holding member 40I arranged at the rear of the third stage from the top is provided. Are provided with engagement receiving portions 42 that mutually engage with the respective engagement protrusions 41 provided on the holding member 40J at the rear of the fourth stage from the top (see FIG. 8).
- Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40K disposed at the rear of the fifth step from the top, while the two side surfaces of the holding member 40J disposed at the rear of the fourth step from the top Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40K at the rear of the fifth stage from the top (see FIG. 4).
- Two engaging protrusions 41 are provided on the rear side surface of the holding member 40L disposed at the rear of the sixth stage from the top, while the rear side surface of the holding member 40K disposed at the rear of the fifth stage from the top. Is provided with an engagement receiving portion 42 that mutually engages with each of the engagement protrusions 41 provided on the holding member 40L at the rear of the sixth stage from the top (see FIG. 8).
- the engaging protrusion 41 of the holding member 40 is adapted to fit inside the engagement receiving portion 42 of the holding member 40 that overlaps the holding member 40, and the plurality of holding members 40 are overlapped to be in an engaged state. Both the engagement protrusion 41 and the engagement receiving part 42 do not protrude to the outside of the holding member 40 and are space-saving.
- a space S is formed between the holding members 40 and 40 adjacent in the vertical direction as shown in FIG. 4. Is to be formed. Specifically, the lower side surface of the holding member 40B disposed in front of the second stage from the top and the upper side surface of the holding member 40C disposed in front of the third stage from the top are both recessed. When the two holding members 40B and 40C are overlapped, a space S penetrating substantially parallel to the short side direction of the laminate film 33 of the unit cell 32 is formed between the holding members 40B and 40C.
- the holding member 40G disposed between the holding member 40D disposed in front of the fourth stage from the top and the holding member 40E disposed in front of the fifth stage from the top, and the rear of the first stage from the top.
- a space S is also formed between the holding member 40K arranged at the rear of the fifth stage from the top and the holding member 40L arranged at the rear of the sixth stage from the top.
- connection portions 36B of the lead terminals 34B and 34B that are adjacent in the vertical direction and have different polarities are arranged.
- a jig (not shown) for welding adjacent lead terminals 34B, 34B having different polarities can be inserted, and the holding member 40 on the side surface or the back side in FIG.
- the side surface is an insertion port 71 for inserting the jig into the space S.
- Each holding member 40 is provided with two through holes 43 through which the first fixing member can be inserted.
- a terminal arrangement part 45 for arranging and holding the lead terminals 34 is formed on the upper side surface of each holding member 40.
- the terminal arrangement part 45 receives and engages with a locking projection 37 of the lead terminal 34.
- a locking groove 46 for stopping is provided (see FIGS. 10 and 12).
- the locking groove 46 has a function of locking the lead terminal 34 and positioning the unit cell 32.
- a thick area 52 having a thickness dimension larger than that of the terminal arrangement section 45 is provided in an area adjacent to the terminal arrangement section 45 of each holding member 40, and the wide area 34 a of the lead terminal 34 is provided in the thick area 52.
- a concave unit cell holding portion 51 into which the corner portion 34c of the second portion is fitted is formed. The movement of the lead terminal 34 (unit cell 32) is restricted by the unit cell holding portion 51.
- each holding member 40 has a heat transfer plate locking portion 44 (engaged portion) that mutually engages with a locking hole 63A (an example of an engagement portion) of the heat transfer plate 60.
- a heat transfer plate locking portion 44 engaged portion
- a locking hole 63A an example of an engagement portion of the heat transfer plate 60.
- the heat transfer plate locking portion 44 is provided in a portion in which a part of the lower side surface of the holding member 40 is hollowed out into a square shape. Slits 44B and 44B are formed on both sides of the heat transfer plate locking portion 44, respectively, and have a structure that can be bent and deformed in the vertical direction.
- the heat transfer plate locking portion 44 having a square shape is formed with a heat transfer plate locking protrusion 44A that protrudes downward (side on which the heat transfer plate is disposed) closer to the end.
- the end surface 44C that separates the slits 44B and 44B of the holding member 40 has a stepped shape, and the protruding piece 63 of the heat transfer plate 60 is moved along the stepped end surface 44C, whereby the heat transfer plate 60 protrudes.
- the piece 63 is slidably mounted on the holding member 40 (an example of a slide portion).
- the distance between the opposing stepped end faces 44C, 44C is the protruding piece of the heat transfer plate 60 on the upper surface side of the holding member 40 (P shown on the lower side in FIG. 16).
- the width dimension Q of 63 it is provided smaller than the width dimension Q of the protruding piece 63 of the heat transfer plate 60 on the lower surface side (R shown on the upper side in FIG. 16). That is, the protruding piece 63 of the heat transfer plate 60 is sandwiched between the lower surface of the holding member 40 and the heat transfer plate locking portion 44 of the holding member 40 when attached to the holding member 40 (FIG. 14).
- the holding members 40C, 40E, 40H, and 40J include an insulating wall portion 54 that surrounds the periphery of the connecting portion 36A that connects the lead terminals 34 and prevents and insulates the other connecting portions 36A and other lead terminals 34 from contacting each other. (See FIG. 2 and the like).
- the holding members 40A, 40C, 40E, 40F, 40H, 40J, and 40L each include a terminal holding portion 47 that holds the voltage detection terminal 66 and an electric wire that houses the electric wire 65 connected to the voltage detection terminal 66.
- a housing groove 48 is provided.
- a crimping portion 65 ⁇ / b> A crimped by a voltage detection terminal 66 of the electric wire 65 is also held in the electric wire receiving groove 48.
- the upper surface (one surface) of the voltage detection terminals 66 held by the terminal holding portions 47 of the holding members 40A, 40C, 40E, 40F, 40H, 40J, and 40L are lead terminals.
- 34 is held at a position that is on the same line (on the XX line and on the YY line) with the lower side surface (an example of the surface).
- each of the holding members 40A and 40F is provided with a bus bar holding portion 49 (an example of a connection member holding portion) that holds the bus bar 38.
- the bus bar holding portion 49 is formed with a recessed portion 49A into which the bus bar 38 is fitted, and a plurality of retaining projections 49B that retain the bus bar 38 fitted into the recessed portion 49A.
- the upper surface (one surface) of the bus bar 38 held by the bus bar holding portion 49 of the holding members 40A, 40F is collinear with the lower surface (an example of the surface) of the lead terminal 34 (YY On the line).
- Each holding member 40 is formed with an electric wire passage portion 53 through which an electric wire 65 attached to the holding member 40 or another holding member 40 is passed.
- the wire passing portion 53 of the holding member 40 other than the holding member 40G arranged at the rear of the first stage from the top is a groove-like portion in which a part of the holding member 40 is cut out, and is accommodated in the case 11.
- the electric wire passing portion 53 of the holding member 40G is disposed so as to protrude out of the case 11 from an electric wire outlet hole formed at the upper end of the rear side surface of the case main body 12. A plurality of electric wires 65 are led out of the case 11 from the electric wire passage portion 53 of the holding member 40G.
- the locking grooves 46 are provided only on the upper surface, but in the other holding members 40, the locking grooves 46 are provided on the upper and lower surfaces, respectively.
- the holding member 40G arranged at the rear of the first stage from the top has a locking hole 50A for locking a laminated body holding member (not shown) and an attachment recess 50B to which the laminated body holding member is attached.
- the multilayer body holding member is disposed between the connection portion 36 ⁇ / b> A of the lead terminal 34 disposed on the rear end face side of the multilayer body 30 and the case 11, and insulates and protects the lead terminal 34.
- Heat transfer plate 60 In the present embodiment, a heat transfer plate 60 made of a heat conductive material is disposed between adjacent unit cells 32 and 32. In the present embodiment, aluminum or aluminum alloy having excellent heat conductivity is used as the heat conductive material.
- the upright wall 61 On the pair of side edges in the longitudinal direction of the heat transfer plate 60, as shown in FIG.
- the upright wall 61 is a heat conducting wall 61 that is disposed so as to contact the inner wall surface of the case 11 when the stacked body 30 is accommodated in the case 11, and conducts heat generated from the unit cell 32 to the case 11. .
- the heat generated from the unit cell 32 is transmitted to the case 11 through the heat conducting wall 61 and is radiated to the outside of the case 11.
- a convex portion 62A projecting downward in FIG. Recesses 62B protruding upward are alternately formed. From the edge of the laminate film 33 that covers the unit cell 32, the metal coating material disposed inside the laminate film 33 may be exposed, but the protrusion 62 ⁇ / b> A formed on the heat transfer plate 60 and The recess 62 ⁇ / b> B prevents the edge of the laminate film 33 of the unit cell 32 from contacting the heat transfer plate 60. Thereby, the short circuit of the cell 32 is prevented.
- the heat transfer plate 60 has two protruding pieces 63 each having a substantially rectangular locking hole 63A formed on both side edges in the short side direction (four in total). Yes.
- the protruding piece 63 is provided at an opposing position.
- the protruding piece 63 is slidably mounted by moving along the end surface 44C (sliding portion 44C) of the holding member 40.
- a heat transfer plate locking projection 44A of the holding member 40 is fitted into a locking hole 63A provided in the protruding piece 63 so as to be engaged with each other.
- Assembly method of battery module 10 of this embodiment Next, a method for assembling the battery module 10 of the present embodiment will be described. A total of six unit cells 32 including lead terminals 34 having a predetermined shape are prepared.
- Each of the holding members 40 corresponding to the end portions of the six heat transfer plates 60 is attached. Specifically, the heat transfer plate 60 with the holding member 40A and the holding member 40G attached, the heat transfer plate 60 with the holding member 40B and the holding member 40H attached, the heat transfer plate 60 with the holding member 40C and the holding member 40I attached, heat transfer plate 60 with holding member 40D and holding member 40J attached, heat transfer plate 60 with holding member 40E and holding member 40K attached, heat transfer plate 60 with holding member 40F and holding A member to which the member 40L is attached is produced.
- the operation of attaching the holding member 40 to the heat transfer plate 60 is performed as follows.
- the protruding piece 63 of the heat transfer plate 60 is inserted between the opposing stepped end faces 44 ⁇ / b> C and 44 ⁇ / b> C of the holding member 40, and the heat transfer plate 60 is slid relative to the holding member 40.
- the protruding piece 63 of the heat transfer plate 60 and the heat transfer plate locking protrusion 44A of the holding member 40 come into contact with each other, the heat transfer plate locking portion 44 is bent and deformed outward.
- the voltage detection terminal 66 to which the connector 64 is connected and the bus bar 38 are attached to predetermined positions of the heat transfer plate 60 to which the holding member 40 is attached two by two.
- the electric wire 65 connected to the connector 64 is accommodated in the electric wire accommodation groove 48 of the holding members 40A, 40C, 40E, 40H, 40J, 40F, and 40L, and the bus bar holding portion 49 of the holding members 40A and 40F Each bus bar 38 is attached (see FIGS. 17 and 18).
- the attaching operation of the electric wire 65 connected to the connector 64 can be executed by fitting the voltage detecting terminal 66 into the terminal holding portion 47 of the holding member 40 and attaching the electric wire 65 in the electric wire receiving groove 48.
- the installation work of the bus bar 38 is performed as follows.
- the bus bar 38 and the retaining projection 49B come into contact with each other, and the retaining projection 49B bends and deforms outward.
- the bus bar 38 is fitted into the recess 49A, the retaining protrusion 49B is elastically restored, restricting the upward movement of the bus bar 38 and becoming a retaining state.
- the unit cell 32 is placed on the heat transfer plate 60.
- the first-stage battery unit 31A from the top is obtained.
- the battery unit 31B in the second stage from the top is obtained.
- a battery unit 31C in the third stage from the top is obtained.
- a battery unit 31D in the fourth stage from the top is obtained.
- the battery unit 31E at the fifth stage from the top is obtained.
- the sixth-stage battery unit 31F from the top is obtained.
- the locking projections 37 of the lead terminals 34 are fitted in the locking grooves 46 of the terminal arrangement portions 45, and the corners 33 c of the lead terminals 34.
- the unit cell 32 is placed on the heat transfer plate 60 so as to fit into the unit cell holding part 51 of each holding member 40. Then, the lead terminal 34 of the cell 32 is locked by the locking groove 46, thereby preventing the position shift of the cell 32 and the movement of the cell 32 is restricted by the cell holding part 51.
- the connecting portion 36A between the adjacent lead terminals 34, 34 is also held in an insulated state. Is done.
- each battery unit 31 the upper surface of the voltage detection terminal 66 held by the terminal holding portion 47 of the holding member 40 and the lower surface of the lead terminal 34 of the unit cell 32 are arranged on the same line, and the voltage detection terminal 66. And the lead terminal 34 are in surface contact (see FIGS. 10 and 12).
- the upper surface of the voltage detection terminal 66 held by the terminal holding portion 47 of the holding member 40, the upper surface of the bus bar 38, and the lower surface of the lead terminal 34 of the unit cell 32 are the same.
- the voltage detection terminal 66 and the bus bar 38 are in surface contact with the lead terminal 34 (see FIG. 12).
- the battery unit 31 is obtained.
- the 6 battery units 31 are stacked in order from the bottom.
- the engagement receiving portion 42 of the holding member 40 arranged in the second step from the bottom (the fifth step from the top) is formed with the engagement protrusion formed in the holding member 40 arranged in the bottom step (the sixth step from the top).
- the battery units 31 are stacked so as to correspond to the portions 41.
- a welding jig is inserted into the space S from the insertion port 71 between the holding members 40 adjacent to each other in the vertical direction, and the ends of the two lead terminals 34B, 34B adjacent to each other in the vertical direction ( The straight portions are joined together.
- welding is performed by irradiating with laser light.
- Adjacent lead terminals 34B and 34B having different polarities are connected to each other.
- a laminated body holding member is attached to the rear end face side of the laminated body 30 obtained in this way, and the laminated body 30 is brought into a holding state.
- the connector-attached electric wire 65 led out from the rear side of the multilayer body 30 is led out from the electric wire outlet hole formed in the upper end of the rear side surface of the case main body 12, and the multilayer body 30 is accommodated in the case main body 12.
- the heat conducting wall 61 is arranged so as to contact the inner wall surface 12 ⁇ / b> A of the case main body 12.
- the insulating lid member 26 is attached to the opening on the front side of the case body 12. Specifically, the electric wire with connector 65 led out from the front side of the laminated body 30 is led out from the notch 29A of the insulating lid member 26, and the bus bar 38 is led out from the bus bar outlet 29B of the insulating lid member 26.
- the insulating lid member 26 is attached to the case body 12. Next, when the lid 18 is placed so as to cover the upper surface of the case body 12, the battery module 10 as shown in FIG. 1 is obtained.
- the heat transfer plate 60 and the holding member 40 engage the heat transfer plate locking protrusion 44A provided in the holding member 40 and the locking hole 63A provided in the heat transfer plate 60 with each other. If the heat transfer plate locking projection 44A provided on the holding member 40 is engaged with the locking hole 63A provided on the heat transfer plate 60, the heat transfer plate 60, the holding member 40, and Can be integrated. As a result, according to this embodiment, it is possible to provide the battery module 10 with improved heat dissipation while preventing a short circuit due to contact with the lead terminals 34 and the like.
- the holding member 40 is formed with the slide portion 44 ⁇ / b> C for slidingly mounting the heat transfer plate 60, so that the efficiency of the work for integrating the heat transfer plate 60 and the holding member 40 is improved. Further improve.
- a plurality of the heat transfer plate locking protrusions 44 ⁇ / b> A and the locking holes 63 ⁇ / b> A are provided at the opposing positions, so that the heat transfer plate 60 is located with respect to the holding member 40. Since it is attached at a plurality of locations at the opposing positions, the displacement of the members is reliably prevented.
- the laminated body 30, the holding member 40, and the case 11 which accommodates the heat exchanger plate 60 are provided, and the heat exchanger plate 60 contacts the inner wall surface 12A of the case 11.
- the heat conduction wall 61 that conducts the heat generated in the unit cell 32 to the case 11 is provided, so that the heat generated in the unit cell 32 is transmitted to the case 11 through the heat conduction wall 61 and is outside the case 11. Because it dissipates heat, it has excellent heat dissipation.
- the unit cell 32 disposed at the end (upper end) in the stacking direction is disposed so as to be in contact with the inner wall surface 12 ⁇ / b> A of the case 11. Since the heat generated in the unit cells 32 arranged at the end in the stacking direction is transmitted to the inner wall surface 12A of the case 11 and radiated to the outside of the case 11, the heat dissipation is further improved.
- the holding member 40 formed with the slide portion 44 ⁇ / b> C for slidingly mounting the heat transfer plate 60 is shown, but a holding member not provided with the slide portion may be used.
- the conductive plate 60 provided with the heat conductive wall 61 in contact with the inner wall surface 12A of the case 11 is shown, but it may be a heat transfer plate provided with no heat conductive wall. .
- the unit cell 32 disposed at the upper end in the stacking direction of the unit cells 32 constituting the stacked body 30 is disposed so as to be in contact with the inner wall surface 12 ⁇ / b> A of the case 11.
- positioned at the lower end part in the lamination direction may be in contact with the inner wall surface of the case.
- the heat transfer plate 60 is made of aluminum or an aluminum alloy
- the constituent material is not limited as long as it is a heat transfer plate made of a heat conductive material.
- the power storage element is a battery has been described, but the power storage element may be a capacitor or the like.
- the example used for the battery module 10 for ISG was shown in the above embodiment, it may be used for a battery module for other purposes.
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- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
しかしながら、この電池モジュールのように複数個の蓄電素子を積層してなる蓄電モジュールにおいては、充放電の繰り返し等により、蓄電素子が高温になることがある。蓄電素子が高温になると、性能の低下が懸念される。
前記保持部材には、前記伝熱板材をスライド装着するスライド部が形成されていてもよい。
このような構成とすると、伝熱板材と保持部材とを一体とする作業の効率がさらに向上する。
このような構成とすると、伝熱板材が保持部材に対して、対向する位置において複数箇所で取り付けられるので、部材のずれが確実に防止される。
このような構成とすると、蓄電素子で発生する熱が熱伝導壁を介してケースに伝わり、ケースの外に放熱されるので放熱性に優れる。
このような構成とすると、積層方向における端部に配置される蓄電素子において発生した熱が、ケース内壁面に伝わってケース外に放熱されるので、放熱性がさらに向上する。
本発明を電池モジュール10に適用した実施形態1を図1ないし図18によって説明する。以下の説明において、図4における左側を前方とし右側を後方とし、図4の上方を上とし下方を下とする。
本実施形態の電池モジュール10は、例えばIntegrated Starter Generator(ISG)用の電池モジュール10として用いられる。
電池モジュール10は、図1に示すように、全体として略直方体形状をなしている。電池モジュール10の前側面および後側面(図1における左右に配される面)からはそれぞれ、各単電池32(蓄電素子の一例)のリード端子34に接続された電線65が複数本、外部に導出されている。複数本の電線65は、それぞれ、一端が板状の電圧検知端子66を介して単電池32のリード端子34に接続され、他端が電圧検知出力コネクタ64(以下「コネクタ64」という)に接続されている。
ケース11は、積層体30を収容するケース本体12と、ケース本体12の上面に被せ付けられる蓋部18と、を備える。ケース本体12は、上面および前側面が開口している。ケース本体12の後側面の上端には、複数の電線65をケース11外に導出する電線導出孔(図示せず)が形成されている。ケース本体12の前側の開口部には絶縁蓋部材26が取り付けられている。
ケース11には図2~図4に示すように、複数の単電池32を積層してなる積層体30が収容されている。本実施形態において、積層体30は、保持部材40が取り付けられた伝熱板60に載置した状態の単電池32(以下「電池ユニット31」という)を、複数積層してなるものである。
電池ユニット31において、上面視略長方形状の単電池32は、図3に示すように、短辺方向の一対の縁部を保持部材40により保持されるとともに、保持部材40に取り付けられた伝熱板60の上に載置されている。
隣り合う単電池32,32の極性の相違するリード端子34,34は、上から1段目の単電池32の負極リード端子34および上から6段目の正極リード端子34を除き、互いに逆方向に屈曲されるとともに、その端部同士を接触するように重ね合わせて溶接することにより接続されている(図7を参照)。
なお、各単電池32の負極のリード端子34は、詳細は図示しないが、それぞれ電圧検知端子66に直接重ねられて接続されている。
最上段の単電池32に接続されるバスバー38(第2バスバー38B)は、電池モジュール10の負極として機能する端子38Bであり、最下段の単電池32に接続されるバスバー38は、電池モジュール10の正極として機能する端子38A(第1バスバー38A)である。各バスバー38は、純アルミ、アルミ合金、銅または銅合金などの導電性材料からなり、絶縁蓋部材26のバスバー導出口29Bから導出される部分39が外部機器と接続される端子部39である。
各単電池32は、絶縁樹脂製の保持部材40により、伝熱板60の上に載置された状態で保持されている。保持部材40は、単電池32の両端部に、それぞれ配されている。
詳しくは、上から2段目の前方に配置される保持部材40Bの下側面と、上から3段目の前方に配置される保持部材40Cの上側面はともに凹んだ形状をなしており、これら2つの保持部材40B,40Cを重ね合わせると、保持部材40B,40C間に単電池32のラミネートフィルム33の短辺方向に対し略平行に貫通する空間Sが形成される。
本実施形態においては、隣り合う単電池32,32の間には、熱伝導性材料からなる伝熱板60が配置されている。本実施形態では、熱伝導性材料として、熱伝導性に優れたアルミニウムまたはアルミニウム合金が用いられる。伝熱板60の長手方向における一対の側縁には、図2に示すように、上方に起立する起立壁61が4つずつ間隔をあけて形成されている。この起立壁61は、積層体30をケース11に収容したときにケース11の内壁面に接触するように配置されて、単電池32から発生する熱をケース11に伝導する熱伝導壁61である。単電池32から発生した熱は熱伝導壁61を介してケース11に伝わり、ケース11の外に放熱されるようになっている。
次に本実施形態の電池モジュール10の組み立て方法について説明する。所定形状のリード端子34を備える単電池32を合計6個準備する。
保持部材40Aと保持部材40Gを取り付けた伝熱板60に、単電池32を載置すると上から1段目の電池ユニット31Aが得られる。保持部材40Bと保持部材40Hを取り付けた伝熱板60に、単電池32を載置すると上から2段目の電池ユニット31Bが得られる。保持部材40Cと保持部材40Iを取り付けた伝熱板60に、単電池32を載置すると上から3段目の電池ユニット31Cが得られる。保持部材40Dと保持部材40Jを取り付けた伝熱板60に、単電池32を載置すると上から4段目の電池ユニット31Dが得られる。保持部材40Eと保持部材40Kを取り付けた伝熱板60に、単電池32を載置すると上から5段目の電池ユニット31Eが得られる。保持部材40Fと保持部材40Lを取り付けた伝熱板60に、単電池32を載置すると上から6段目の電池ユニット31Fが得られる。
このようにして得られた積層体30の後方の端面側に積層体保持部材を取り付けて積層体30を保持状態とする。
次に、本実施形態の作用および効果について説明する。
本実施形態において、伝熱板60と保持部材40とは、保持部材40に設けた伝熱板係止突部44Aと伝熱板60に設けた係止孔63Aとを相互に係合させることにより一体となっているので、保持部材40に設けた伝熱板係止突部44Aを伝熱板60に設けた係止孔63Aに係合させれば、伝熱板60と保持部材40とを一体にすることができる。その結果、本実施形態によれば、リード端子34等との接触に起因する短絡を防止しつつ、放熱性を向上した電池モジュール10を提供することができる。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)上記実施形態では、両端部にリード端子34が設けられている単電池32の両端部にそれぞれ保持部材40が取り付けられた構成を示したが、これに限定されない。一端部にリード端子が設けられている単電池の、リード端子が設けられている端部のみに保持部材を取り付けたものや、一端部にリード端子が設けられている単電池の両端部に保持部材を取り付けたものであってもよい。
(2)上記実施形態では、係合部44Aおよび被係合部63Aが、複数設けられるとともに、対向する位置に設けられている例を示したが、係合部および被係合部は1つずつでもよい。
(3)上記実施形態では、伝熱板60をスライド装着するスライド部44Cが形成された保持部材40を示したが、スライド部が設けられていない保持部材であってもよい。
(4)上記実施形態では、ケース11の内壁面12Aと接触する熱伝導壁61が設けられている伝導板60を示したが、熱伝導壁の設けられていない伝熱板であってもよい。
(5)上記実施形態では、積層体30を構成する単電池32のうち、積層方向における上端部に配置される単電池32が、ケース11の内壁面12Aと接触可能に配置されている構成を示したが、積層方向における下端部に配置される単電池がケースの内壁面と接触していてもよい。
(6)上記実施形態では、伝熱板60がアルミニウムまたはアルミニウム合金製である例を示したが、熱伝導性の材料からなる伝熱板であれば、構成材料は限定されない。
(7)上記実施形態では、蓄電素子が電池である例を示したが、蓄電素子は、コンデンサなどであってもよい。
(8)上記実施形態では、ISG用の電池モジュール10に用いる例を示したが、他の用途の電池モジュールに用いてもよい。
11…ケース
12…ケース本体(ケース)
12A…ケースの内壁面
18…蓋部(ケース)
20…突出面
30…積層体
31…電池ユニット
32…単電池(蓄電素子)
33…ラミネートフィルム
33A…面積の広い面33A
34(34A,34B)…リード端子
40…保持部材
44…伝熱板係止部
44A…伝熱板係止突部(係合部)
44B…スリット
44C…端面(スライド部)
60…伝熱板
61…熱伝導壁
62A…凸部
62B…凹部
63…突出片
63A…係止孔(被係合部)
Claims (5)
- 端部から外側方向に突出する正極および負極のリード端子を有する複数の蓄電素子を積層してなる積層体と、
前記蓄電素子の端部のうち、少なくとも前記リード端子が突出する端部に取り付けられ、当該蓄電素子を保持する絶縁樹脂製の保持部材と、
積層方向において隣り合う前記蓄電素子の間に配置されるとともに前記蓄電素子で発生する熱を外部に伝導する熱伝導性材料からなる伝熱板材と、を備え、
前記保持部材および前記伝熱板材のうち、一方には係合部が設けられ、他方には前記係合部に係合される被係合部が設けられ、
前記係合部と前記被係合部とを相互に係合させることにより、前記保持部材と前記伝熱板材とが一体となっている蓄電モジュール。 - 前記保持部材には、前記伝熱板材をスライド装着するスライド部が形成されている請求項1に記載の蓄電モジュール。
- 前記係合部および前記被係合部は、複数設けられるとともに、対向する位置に設けられている請求項1または請求項2に記載の蓄電モジュール。
- 前記積層体と、前記保持部材と、前記伝熱板材と、を収容するケースを備え、
前記伝熱板材には、前記ケースの内壁面と接触して前記蓄電素子で発生する熱をケースに伝導する熱伝導壁が設けられている請求項1ないし請求項3のいずれか一項に記載の蓄電モジュール。 - 前記複数の蓄電素子のうち、積層方向における端部に配置される蓄電素子が、前記ケースの内壁面と接触可能に配置されている請求項4に記載の蓄電モジュール。
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US14/433,755 US9543624B2 (en) | 2012-10-24 | 2013-09-02 | Electrical storage module |
CN201380055453.8A CN104756307B (zh) | 2012-10-24 | 2013-09-02 | 蓄电模块 |
EP13848753.3A EP2897212B1 (en) | 2012-10-24 | 2013-09-02 | Electrical storage module |
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EP (1) | EP2897212B1 (ja) |
JP (1) | JP6020903B2 (ja) |
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CN106450074A (zh) * | 2016-04-12 | 2017-02-22 | 安徽欧鹏巴赫新能源科技有限公司 | 软包动力锂离子电池模组支撑框板 |
KR20210012544A (ko) | 2019-07-25 | 2021-02-03 | 현대모비스 주식회사 | 배터리 모듈 어셈블리 |
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JP6937350B2 (ja) * | 2019-11-07 | 2021-09-22 | 株式会社オートネットワーク技術研究所 | 蓄電モジュール |
KR20210133532A (ko) * | 2020-04-29 | 2021-11-08 | 주식회사 엘지에너지솔루션 | 전지 모듈 및 이를 포함하는 전지팩 |
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JP2010015854A (ja) * | 2008-07-04 | 2010-01-21 | Sony Corp | 燃料電池収納構造および電子機器 |
KR101130043B1 (ko) * | 2009-07-27 | 2012-03-28 | 주식회사 엘지화학 | 냉각 효율성이 향상된 전지모듈 |
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JP5465125B2 (ja) * | 2010-07-30 | 2014-04-09 | Fdk株式会社 | 蓄電モジュール |
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JP2009301877A (ja) * | 2008-06-13 | 2009-12-24 | Toyoda Gosei Co Ltd | 組電池装置 |
JP2012523086A (ja) * | 2009-04-01 | 2012-09-27 | エルジー・ケム・リミテッド | 優れた放熱特定の電池モジュール及びそれを備えた中大型電池パック |
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EP2897212B1 (en) | 2016-08-31 |
JP2014086280A (ja) | 2014-05-12 |
JP6020903B2 (ja) | 2016-11-02 |
EP2897212A4 (en) | 2015-08-05 |
US9543624B2 (en) | 2017-01-10 |
CN104756307B (zh) | 2017-09-12 |
CN104756307A (zh) | 2015-07-01 |
KR20150056585A (ko) | 2015-05-26 |
KR101661869B1 (ko) | 2016-09-30 |
US20150236387A1 (en) | 2015-08-20 |
EP2897212A1 (en) | 2015-07-22 |
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