WO2010150439A1 - 蓄電ユニット - Google Patents
蓄電ユニット Download PDFInfo
- Publication number
- WO2010150439A1 WO2010150439A1 PCT/JP2010/001218 JP2010001218W WO2010150439A1 WO 2010150439 A1 WO2010150439 A1 WO 2010150439A1 JP 2010001218 W JP2010001218 W JP 2010001218W WO 2010150439 A1 WO2010150439 A1 WO 2010150439A1
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- WO
- WIPO (PCT)
- Prior art keywords
- power storage
- storage element
- holder
- storage unit
- fixing plate
- Prior art date
Links
- 238000003860 storage Methods 0.000 title claims abstract description 205
- 230000002093 peripheral effect Effects 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 36
- 230000005611 electricity Effects 0.000 claims description 35
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- 229910052751 metal Inorganic materials 0.000 claims description 15
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- 125000006850 spacer group Chemical group 0.000 description 11
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/26—Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices with each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- 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
- H01M10/643—Cylindrical 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
- 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
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- 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
- 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
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to a power storage unit that stores power in a power storage element and discharges the power when necessary.
- an electric storage unit configured by using a plurality of electric storage elements such as a secondary battery and a large-capacity capacitor (for example, Patent Document 1 and Patent Document 2) are widely used.
- FIG. 7 is an exploded perspective view showing the entire structure of a conventional power storage unit.
- a battery pack disclosed in Patent Document 1 is shown as the power storage unit.
- a plurality of batteries 101 are arranged in a stacked manner by spacers 103. Further, positive and negative electrodes are formed at both ends of each battery 101, and are arranged so that the positive and negative of the electrodes of adjacent batteries 101 are reversed.
- a plurality of battery lead plates 105 are electrically connected to the electrodes of the batteries 101 arranged in two stages by the spacer 103. Thereby, the some battery 101 is connected so that it may become series-parallel.
- the lower battery 101 is accommodated along the guide groove 109 provided in the lid case 107.
- the battery 101 is fixed by a double-sided tape (not shown) attached to the guide groove 109.
- a main body case 111 is placed on the lid case 107 so as to cover the entire battery 101.
- a circuit board 115 is disposed on the upper surface of the main body case 111 via a board holder 113.
- a plurality of output leads 117 are electrically connected to the circuit board 115, and these are electrically connected to connection terminals 119 formed integrally with the battery lead plate 105.
- the batteries 101 are arranged in a stacked manner, so that useless space is reduced and downsizing is possible, and a part of the side surface of the battery 101 is attached to the lid case 107 by a double-sided tape. Since it is fixed, a battery pack having excellent vibration resistance can be realized.
- the present invention solves the above-described conventional problems, and provides a power storage unit that can achieve both higher vibration resistance against large vibrations applied to the power storage unit and better heat dissipation against heat generation from the power storage element.
- the purpose is to do.
- an electricity storage unit of the present invention includes a plurality of electricity storage elements having a cylindrical shape and electrically connected to each other, and a part of a cylindrical peripheral surface of the electricity storage element made of metal.
- a holder having an arcuate concave surface to be stored; a fixing plate attached to the holder so as to hold the power storage element; and the power storage element disposed between a peripheral surface of the power storage element and a concave surface of the holder;
- a first bonding material for bonding the holder is provided.
- the entire portion of the circumferential surface of the electricity storage device that is housed in the concave surface of the holder in the electricity storage device by interposing the bonding material between the portion that is housed in the concave surface of the holder and the concave surface of the holder.
- Heat generation is efficiently transmitted to the holder through the bonding material, compared to the case where the power storage element is in contact with the spacer at only four places as in the prior art.
- FIG. 1 is an exploded perspective view showing an overall structure of a power storage unit according to an embodiment of the present invention.
- FIG. 2A is a perspective view showing an external structure of the power storage unit according to the embodiment before assembly of the power storage element.
- FIG. 2B is a perspective view showing an external structure after the storage element is assembled in the storage unit of the embodiment.
- FIG. 3 is a partial cross-sectional view showing a storage state of the storage element in the holder in the storage unit of the embodiment.
- FIG. 4 is a partial cross-sectional view showing the internal structure of the double-sided tape in the electricity storage unit of the embodiment.
- FIG. 5 is an external perspective view showing the overall structure after assembly in the power storage unit of the embodiment.
- FIG. 1 is an exploded perspective view showing an overall structure of a power storage unit according to an embodiment of the present invention.
- FIG. 2A is a perspective view showing an external structure of the power storage unit according to the embodiment before assembly of the power storage element.
- FIG. 2B is a perspective
- FIG. 6 is a perspective view showing another structural example of the fixing plate in the power storage unit of the embodiment.
- FIG. 7 is an exploded perspective view showing the entire structure of a conventional battery pack (storage unit).
- FIG. 8 is a partial cross-sectional view showing a storage state of a battery in a spacer in a conventional battery pack (storage unit).
- FIG. 1 is an exploded perspective view showing the overall structure of the power storage unit of the present embodiment.
- 2A and 2B are perspective views showing an external structure of a power storage element with a bus bar in the power storage unit of the present embodiment,
- FIG. 2A is an exploded perspective view before assembly, and
- FIG. 2B is a perspective view after assembly.
- FIG. 3 is a schematic partial cross-sectional view showing a state where the power storage element is housed in the holder in the power storage unit of the present embodiment.
- FIG. 4 is a schematic partial cross-sectional view showing the internal structure of the double-sided tape in the electricity storage unit of the present embodiment.
- FIG. 5 is an external perspective view showing the overall structure after assembly in the power storage unit of the present embodiment.
- FIG. 6 is a perspective view showing another structure example of the fixing plate in the power storage unit of the present embodiment.
- the power storage unit uses 12 power storage elements 11. These are configured to be electrically connected to the adjacent storage element 11 by the bus bar 13. Here, the twelve power storage elements 11 are all connected in series.
- the electric storage element 11 is an electric double layer capacitor having a large capacity and excellent rapid charge / discharge characteristics.
- the storage element 11 has a cylindrical shape as shown in FIG. 2A, and an end face electrode 15 is formed at one end (the upper end in FIG. 2A).
- the end face electrode 15 is a positive electrode.
- the cylindrical shape of the electricity storage element 11 is formed by extruding an aluminum plate, and the circumferential surface of the column constitutes the circumferential electrode 17.
- the peripheral electrode 17 is a negative electrode.
- the bottom surface of the electricity storage element 11 is also molded integrally with the peripheral surface, so that it becomes a negative electrode.
- the electrical connection to the bottom surface is not performed.
- an insulating material is interposed between the end face electrode 15 and the peripheral face electrode 17 so as to maintain electrical insulation.
- the bus bar 13 is a member that electrically connects adjacent power storage elements 11 to each other, and is configured by press-molding aluminum.
- the shape after molding is shown in FIG. 2A.
- the bus bar 13 has a substantially L shape, and the peripheral electrode welding portion 19 is bent into a shape along the outer periphery of the peripheral electrode 17.
- a bus bar terminal 23 is integrally formed with the flat end portion 21 of the bus bar 13. Further, a bent portion 24 is provided between the peripheral electrode welded portion 19 and the flat end portion 21.
- the flat end portion 21 when the flat end portion 21 is welded to the end face electrode 15 of the adjacent power storage element 11, even if there is a misalignment, it can be absorbed by the bent portion 24 and the assembled power storage unit can be vibrated from the outside.
- the bending portion 24 can relieve the stress applied to the weld connection portion between the flat end portion 21 and the end face electrode 15. Therefore, it is possible to reduce the possibility that the welded portion between the flat end portion 21 and the end face electrode 15 is detached due to vibration, and good vibration resistance can be obtained.
- FIG. 2B shows a state where the bus bar 13 is connected to the power storage element 11.
- the peripheral electrode welded portion 19 of the bus bar 13 has a shape that matches the outer periphery of the peripheral electrode 17 of the power storage element 11. And mechanical connection is possible.
- the end face electrode 15 of the adjacent power storage element 11 and the flat end portion 21 of the bus bar 13 are welded to the plurality of power storage elements 11 to which the bus bar 13 is welded.
- the power storage elements 11 are connected in series. This welding is performed using a jig that can be positioned so that the end face electrode 15 of each power storage element 11 is in contact with the flat end portion 21 of the adjacent bus bar 13 accurately.
- the six power storage elements 11 thus configured are used in two rows so that all twelve power storage elements 11 are connected in series. For this reason, as shown in FIG. The direction is rotated 90 degrees so as to overlap the end face electrode 15 at the right end of the front row, and the welding connection is made.
- the positive electrode terminals 25 for power input / output of all the electricity storage elements 11 are connected by welding.
- the positive electrode terminal 25 has a plate shape in which the peripheral electrode welding portion 19 of the bus bar 13 is a flat end portion 21, and is formed by molding aluminum in the same manner as the bus bar 13. Further, the bus bar terminal 23 and the bent portion 24 are also integrally formed.
- the bus bar 13 at the left end of the front row in FIG. Therefore, the bus bar 13 is used as a negative electrode terminal 26 for power input / output of all the power storage elements 11.
- the holder 27 has a plurality of arcuate concave surfaces 29 (here, twelve locations) for housing a part of the peripheral surface of the power storage element 11 in a rectangular parallelepiped made of metal (here, made of aluminum). ) Has a provided configuration. Further, a fixing plate screw hole 31 and a case screw hole 33 for screwing a fixing plate and a case to be described later are also provided.
- the concave surface 29 is formed so as to have a substantially semicircular shape when the holder 27 of FIG. 1 is viewed from above.
- Such a holder 27 is formed by extrusion molding or cutting.
- the concave surface 29 is provided so that the power storage elements 11 are not stacked. Thereby, the heat capacity of the holder 27 can be increased. Furthermore, since the space
- the concave surface 29 of the holder 27 stores a part of the peripheral surface of the power storage element 11.
- the portion of the peripheral surface of the power storage element 11 that is stored in the concave surface 29 and the concave surface 29 of the holder 27. are joined with an insulating bonding material (hereinafter referred to as an insulating bonding material).
- an insulating bonding material hereinafter referred to as an insulating bonding material.
- the reason why the bonding material is made insulative is that since the storage element 11 has the peripheral electrode 17, when the plurality of storage elements 11 are housed in the metal holder 27, the peripheral electrodes 17 are electrically connected to each other. This is to prevent short circuit.
- double-sided tape 35 was used as the insulating bonding material. That is, in the electricity storage element 11, the circumferential surface of the electricity storage element 11 is joined to the concave surface 29 by applying the double-sided tape 35 to the peripheral surface portion accommodated in the concave surface 29 and further accommodating in the holder 27. In the configuration of FIG. 1, approximately half the area of the circumferential surface of the electricity storage element 11 is fixed by the concave surface 29 and the double-sided tape 35. Note that the double-sided tape 35 may be configured to store the power storage element 11 after first being attached to the concave surface 29.
- FIG. 3 is a schematic partial cross-sectional view showing a storage state of the storage element in the holder at the joint between the storage element and the holder in the storage unit of the present embodiment.
- the radius Rc of the electricity storage element 11 in order to store the circumferential surface of the electricity storage element 11 in the concave surface 29, the radius Rc of the electricity storage element 11 must be smaller than the radius Rk of the concave surface 29.
- the peripheral surface of the electricity storage element 11 comes into contact with only one point on the circumference of the concave surface 29, and a gap is generated in the other portion. In this state, even if the power storage element 11 generates heat due to frequent charging / discharging, heat cannot be efficiently radiated from the holder 27.
- the double-sided tape 35 joins the peripheral surface of the electricity storage element 11 and the concave surface 29 in order to fill the gap.
- the thickness t of the double-sided tape 35 was set to be equal to or larger than the difference between the radius Rk of the concave surface 29 and the radius Rc of the power storage element 11 as shown in FIG.
- the double-sided tape 35 is embedded in the gap between the peripheral surface of the electricity storage element 11 and the concave surface 29 after being joined by the double-sided tape 35.
- FIG. 4 is a schematic partial sectional view showing the internal structure of the double-sided tape 35 in the power storage unit of the present embodiment.
- the double-sided tape 35 has a laminated structure of a base material 37 and an adhesive portion 38 formed on both surfaces thereof.
- a resin having elasticity for example, foil-like rubber
- the base material 37 of the double-sided tape 35 is deformed so that the innermost part of the concave surface 29 becomes thinner and the front part becomes thicker. That is, the thickness t of the double-sided tape 35 becomes non-uniform when the electricity storage element 11 is fixed to the holder 27 with the fixing plate.
- the double-sided tape 35 fills the entire gap formed between the power storage elements 11 having different radii and the concave surface 29, efficient heat dissipation is possible.
- the adhesive portion 38 of the double-sided tape 35 is configured to contain a thermally conductive filler.
- a thermally conductive filler for example, a ceramic made material such as alumina or silica is used.
- the thermal conductivity in the adhesion part 38 which consists of a resin component can be improved.
- the following effects are acquired by containing a heat conductive filler.
- the base 37 is a resin such as a foil-like rubber, when a plurality (six in this case) of the storage elements 11 are pushed into the concave surface 29 at once by the fixing plate described later, the respective storages are stored. Depending on the magnitude and variation of the stress applied to the element 11, a large stress may be applied to a part of the substrate 37, leading to cutting. Alternatively, with the use of the power storage unit, the base material 37 may deteriorate due to vibration or thermal shock, and a portion where stress is concentrated may be cut.
- the base material 37 If the base material 37 is cut, the base material 37 does not exist in that portion, and the adhesive portion 38 is thinner than the base material 37, so that the circumferential surface of the electricity storage element 11 is in direct contact with the concave surface 29, There is a possibility of electrical conduction (short circuit).
- the double-sided tape 35 of this Embodiment contains the heat conductive filler in the adhesion part 38, when the electrical storage element 11 is strongly pushed into the concave surface 29, or deterioration progresses, a base material is obtained. Even if 37 is cut, the thermal conductive filler that is uniformly contained in the entire adhesive portion 38 is interposed between the peripheral surface of the power storage element 11 and the concave surface 29. Moreover, since the adhesion part 38 is formed in both surfaces of the base material 37, the amount of intervention of a heat conductive filler is also securable. Furthermore, the thermally conductive filler has an insulating property. For these reasons, the use of the double-sided tape 35 shown in FIG. 4 can reduce the possibility that the circumferential surface of the electricity storage element 11 is in direct contact with the concave surface 29 and short-circuits, and has high heat dissipation and high reliability. Can be obtained simultaneously.
- the fixing plate 39 is made of resin, and has holding portions 41 made up of six arcuate concave surfaces for housing and holding a part of the cylindrical peripheral surface of the electricity storage element 11.
- the holding portion 41 is dimensioned so that a slight gap is formed between the holder 27 and the fixing plate 39 when holding the power storage element 11 accommodated in the concave surface 29.
- the eight fixing plate screws 43 are tightened into the fixing plate screw holes 31 so that there is no gap between them, so that the elasticity of the resin of the fixing plate 39 can be increased.
- the electric storage element 11 is held so as to be pushed into the holder 27 side.
- the power storage element 11 is bonded to the holder 27 with the double-sided tape 35 and is firmly held by the elasticity of the fixing plate 39. Therefore, even if the power storage unit is used for applications in which vibrations are remarkable (for example, hybrid construction machines), the possibility that the power storage element 11 is disconnected or the bus bar 13 is disconnected is reduced, and good vibration resistance is achieved. Is obtained.
- a bottom plate 44 is integrally formed at the lower end portion of the holding portion 41 of the fixed plate 39. Accordingly, the bottom of the electricity storage element 11 is blocked from the outside by the bottom plate 44.
- the bottom plate 44 is formed so that when the power storage element 11 is held by the holding portion 41, the bottom of the power storage element 11 is in a position where it does not come into contact. As a result, even if the height of the power storage element 11 varies, the variation is accommodated in the gap between the bottom portion of the power storage element 11 and the bottom plate 44.
- the entire power storage element 11 is blocked from the outside by the concave surface 29, the holding portion 41, the bottom plate 44, and a case to be described later, so that dust and particles on the power storage element 11 and the bus bar 13 can be obtained. It is possible to reduce the adhesion of impurities such as suspended solids. Therefore, since the possibility of corrosion of the power storage element 11 and the bus bar 13 due to impurities is reduced, high reliability can be obtained.
- fins 45 are integrally formed on the surface of the fixing plate 39 opposite to the holding portion 41, that is, on the outer wall surface. As a result, the mechanical strength of the fixing plate 39 can be increased, and the surface area of the outer wall is increased by the amount of the fins 45, so that the heat dissipation from the fixing plate 39 can be improved.
- the fins 45 are provided only at one central portion. However, the fins 45 may be provided at a plurality of locations, and the shape of the fins 45 is not limited to the horizontal direction in FIG. 1. You may provide in a perpendicular direction.
- the case 47 is fixed to the upper portion of the holder 27 as shown in FIG. 1 with the fixing plates 39 fixed to both sides of the holder 27.
- the case fixing screw 49 is fixed in the case screw hole 33 through the case 47.
- the upper portion of the electricity storage element 11 to which the double-sided tape 35 is not attached is enclosed by the case 47.
- the upper portion of the power storage element 11 can be blocked from the outside, and adhesion of dust and the like is reduced.
- the case 47 is made of resin, and a plurality of holes 51 are provided on the upper surface thereof.
- the bus bar terminal 23 formed integrally with the bus bar 13 is protruded from the upper surface of the case 47 through the hole 51.
- the circuit board 53 is arranged on the upper surface of the case 47. At this time, the bus bar terminal 23 is inserted into a terminal hole (not shown) provided in the circuit board 53 and soldered. The bus bar terminal 23 is electrically connected.
- the circuit board 53 can detect the voltage at the electrical connection point of each storage element 11. Furthermore, the circuit board 53 has a built-in balance circuit (not shown) that equalizes the voltage across each power storage element 11 according to the detected voltage. However, the voltage of each power storage element 11 can also be controlled by the balance circuit. This can be done via the bus bar terminal 23. A plurality of electronic components constituting the voltage detection circuit and the balance circuit are mounted on the circuit board 53, but are omitted in FIG.
- FIG. 5 shows a perspective view after the assembly of the power storage unit described so far.
- the circuit board 53 is fixed to the case 47 by six circuit board fixing screws 55.
- the positive terminal 25 and the negative terminal 26 are connected to an external charge / discharge circuit (not shown).
- an external charge / discharge circuit not shown.
- the holder 27 When using a plurality of power storage units, it is desirable that the holder 27 is fixed so as to be in contact with a metal base (not shown) having a large heat capacity. Thereby, the heat of the holder 27 is quickly transmitted to the pedestal, and more efficient heat dissipation becomes possible. In addition, if it is set as the structure which water-cools the base itself, much higher heat dissipation will be acquired.
- the power storage elements 11 to which the double-sided tape 35 has been applied in advance and the bus bar 13 is welded are arranged on the holding portion 41 of the fixed plate 39.
- a jig (not shown) is also used, and the bus bars 13 are arranged so as to be in contact with the adjacent end face electrode 15.
- the fixing plate 39 and the end face electrode of the electricity storage element 11 arranged by the jig and the flat end portion 21 of the bus bar 13 are connected by welding.
- the protective sheet (not shown) of the double-sided tape 35 is peeled off, and the fixing plate 39 is fixed to the holder 27 with the fixing plate screw 43 so that the electric storage element 11 is accommodated in the concave surface 29 of the holder 27.
- the bus bar 13 connected to the power storage element 11 at the right end of the rear row in FIG. 1 and the end face electrode 15 of the power storage element 11 at the right end of the front row are connected by welding.
- the positive electrode terminal 25 is welded to the end electrode 15 at the left end of the rear row.
- the case 47 is fixed to the holder 27. Both are fixed by a case fixing screw 49. Thereafter, the circuit board 53 is electrically connected to the bus bar terminal 23 and mechanically connected to the case 47 with the circuit board fixing screw 55.
- the above assembling method is an example, and any method other than the above may be used as long as the assembling is possible, such as fixing the power storage element 11 to the holder 27 first.
- the portion of the peripheral surface of the electricity storage element 11 that is accommodated in the concave surface 29 of the holder 27 and the concave surface 29 of the holder 27 are joined by the double-sided tape 35 (insulating bonding material).
- the power storage element 11 is firmly fixed to the holder 27, and the vibration resistance is improved.
- the double-sided tape 35 is interposed between the peripheral surface of the power storage element 11 and the concave surface 29, the heat of the power storage element 11 is efficiently transmitted to the holder 27 via the double-sided tape 35, and the heat dissipation is improved. Therefore, it is possible to realize a power storage unit that can achieve both vibration resistance and high heat dissipation.
- the fixing plate 39 is made of resin, but it may be made of metal (for example, aluminum). Thereby, since the heat of the electrical storage element 11 is also radiated from the fixed plate 39, further high heat dissipation is obtained. Further, by forming a large number of fins 45 on the outer wall surface of the fixed plate 39, the fins 45 are made of metal, so that even higher heat dissipation can be obtained.
- the fixing plate 39 is made of metal, an insulating bonding material is provided between the concave surface (holding portion 41) of the fixing plate 39 and the peripheral surface of the electricity storage element 11 in order to insulate the plurality of electricity storage elements 11. It is necessary to distribute. Specifically, if the double-sided tape 35 is used as the insulating bonding material, the entire peripheral surface of the power storage element 11 may be covered with the double-sided tape 35. In this case, similarly to the radius Rk of the concave surface 29 of the holder 27, the radius of the concave surface of the fixing plate 39 is determined such that the difference from the radius Rc of the power storage element 11 is less than the thickness t of the double-sided tape 35.
- the fixing plate 39 is fastened to the holder 27 with the fixing plate screw 43 to generate a stress that pushes the power storage element 11 into the concave surface 29 due to the elasticity of the fixing plate 39.
- an elastic portion 57 may be provided on at least a part of the fixed plate 39 that contacts the power storage element 11.
- the elastic portion 57 for example, the U-shaped cantilever shown in FIG. At this time, the elastic portion 57 is formed by being bent toward the holding portion 41 side.
- the elastic portion 57 presses the peripheral surface of each power storage element 11, so that it is more reliable than the indentation stress due to the elasticity of the entire fixing plate 39 described in the configuration of FIG. A stress can be applied to each power storage element 11. Therefore, it is possible to more firmly fix the vibration.
- the material of the fixing plate 39 may be resin or metal.
- the double-sided tape 35 is used as the insulating bonding material when the peripheral surface of the power storage element 11 and the concave surface 29 are bonded, but this may also be used as an adhesive containing a thermally conductive filler. Good.
- the adhesive itself has plasticity, like the rubber base material 37 of the double-sided tape 35, the adhesive layer becomes thin by pushing the power storage element 11 into the concave surface 29, and good thermal conductivity is obtained. .
- the adhesive can be evenly distributed in the gap between the peripheral surface of the power storage element 11 and the concave surface 29, and can be firmly held.
- the peripheral surface electrode 17 of the power storage element 11 may come into contact with the holder 27 and be electrically short-circuited.
- a thermally conductive filler made of ceramics Thereby, even if it pushes the electrical storage element 11 into the concave surface 29, since a heat conductive filler exists between both, the short circuit possibility of the surrounding surface electrode 17 and the holder 27 can be reduced.
- the adhesive since the adhesive has higher plasticity than the double-sided tape 35, it can be interposed as thinly as possible between the peripheral surface of the power storage element 11 and the concave surface 29. Therefore, heat dissipation becomes good. However, since a uniform application process and a curing process of the adhesive are required, the assemblability is inferior to that of the double-sided tape 35. Therefore, any insulating bonding material may be used as appropriate in accordance with required heat dissipation and assembly ease. Further, the adhesive may be arranged between the concave surface (holding portion 41) of the fixing plate 39 and the peripheral surface of the power storage element 11.
- the power storage element 11 has the peripheral electrode 17.
- the power storage element 11 may be provided with an insulating portion such as an insulating tube on the peripheral surface.
- the end face electrodes are arranged on both ends of the cylinder. Therefore, since the peripheral surface of the electricity storage element 11 is insulated by the insulating tube, the bonding material with the holder 27 does not need to be insulative. Therefore, for example, when the double-sided tape 35 is used, the adhesive portion 38 can contain a conductive filler such as a metal as a thermal conductive filler. Thereby, compared with the heat conductive filler which consists of ceramics etc., the heat conductivity in the double-sided tape 35 is improved.
- the insulating tube is thicker than the double-sided tape 35 and the adhesive, so that the thermal resistance increases accordingly. Therefore, particularly in applications where charging and discharging are frequently performed, even if the conductive filler is used, the cooling performance may be insufficient. In this case, the configuration of the present embodiment is desirable.
- an electric double layer capacitor is used as the storage element 11, but this may be another capacitor such as an electrochemical capacitor or a secondary battery.
- the power storage unit of the present invention can simultaneously achieve vibration resistance and high heat dissipation, it is particularly useful as a power storage unit that frequently charges and discharges power storage elements.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Power Sources (AREA)
Abstract
Description
Claims (11)
- 円柱形状を有し互いに電気的に接続される複数の蓄電素子と、
金属からなり前記蓄電素子の円柱形状の周面の一部を収納する円弧状の凹面を有するホルダと、
前記蓄電素子を保持するように前記ホルダに取り付けられた固定板と、
前記蓄電素子の周面と前記ホルダの凹面との間に配置され前記蓄電素子と前記ホルダとを接合する第1の接合材とを備えた
ことを特徴とする蓄電ユニット。 - 前記第1の接合材は、前記ホルダの凹面の半径と前記蓄電素子の半径の差以上の厚さを有し絶縁材料からなる両面粘着テープである
ことを特徴とする請求項1に記載の蓄電ユニット。 - 前記固定板は、弾性特性を有する絶縁材料からなり前記蓄電素子の円柱形状の周面の一部を収納する円弧状の凹面が形成された
ことを特徴とする請求項1に記載の蓄電ユニット。 - 前記固定板は、金属からなり前記蓄電素子の円柱形状の周面の一部を収納する円弧状の凹面が形成され、
前記蓄電素子の周面と前記固定板の凹面との間に配置され前記蓄電素子と前記固定板とを接合する絶縁材料からなる第2の接合材を備えた
ことを特徴とする請求項2に記載の蓄電ユニット。 - 前記第2の接合材は、前記固定板の凹面の半径と前記蓄電素子の半径の差以上の厚さを有し絶縁材料からなる両面粘着テープである
ことを特徴とする請求項4に記載の蓄電ユニット。 - 前記第1の接合材は、両面の粘着部が熱伝導性フィラを含有して形成された
ことを特徴とする請求項2に記載の蓄電ユニット。 - 前記第1の接合材は、前記蓄電素子を前記ホルダと前記固定板で固定したときに厚さが不均一になるように形成された
ことを特徴とする請求項6に記載の蓄電ユニット。 - 前記第2の接合材は、両面の粘着部が熱伝導性フィラを含有して形成された
ことを特徴とする請求項5に記載の蓄電ユニット。 - 前記第2の接合材は、前記蓄電素子を前記ホルダと前記固定板で固定したときに厚さが不均一になるように形成された
ことを特徴とする請求項8に記載の蓄電ユニット。 - 前記固定板は、外壁面にフィンが形成された
ことを特徴とする請求項1に記載の蓄電ユニット。 - 前記固定板は、前記蓄電素子と接する少なくとも一部分に弾性部が形成された
ことを特徴とする請求項1に記載の蓄電ユニット。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080029000.4A CN102460621B (zh) | 2009-06-26 | 2010-02-24 | 蓄电单元 |
EP10791767.6A EP2447966A4 (en) | 2009-06-26 | 2010-02-24 | Electrical storage unit |
US13/377,871 US9478362B2 (en) | 2009-06-26 | 2010-02-24 | Electrical storage unit |
KR1020117025903A KR101396643B1 (ko) | 2009-06-26 | 2010-02-24 | 축전 유닛 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-151678 | 2009-06-26 | ||
JP2009151678A JP5451211B2 (ja) | 2009-06-26 | 2009-06-26 | 蓄電ユニット |
Publications (1)
Publication Number | Publication Date |
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WO2010150439A1 true WO2010150439A1 (ja) | 2010-12-29 |
Family
ID=43386230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/001218 WO2010150439A1 (ja) | 2009-06-26 | 2010-02-24 | 蓄電ユニット |
Country Status (6)
Country | Link |
---|---|
US (1) | US9478362B2 (ja) |
EP (1) | EP2447966A4 (ja) |
JP (1) | JP5451211B2 (ja) |
KR (1) | KR101396643B1 (ja) |
CN (1) | CN102460621B (ja) |
WO (1) | WO2010150439A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
EP2447966A4 (en) | 2018-04-04 |
JP2011009477A (ja) | 2011-01-13 |
JP5451211B2 (ja) | 2014-03-26 |
US9478362B2 (en) | 2016-10-25 |
KR20120030041A (ko) | 2012-03-27 |
CN102460621A (zh) | 2012-05-16 |
EP2447966A1 (en) | 2012-05-02 |
CN102460621B (zh) | 2014-07-23 |
KR101396643B1 (ko) | 2014-05-19 |
US20120082887A1 (en) | 2012-04-05 |
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