WO2018105610A1 - Unité de relais - Google Patents

Unité de relais Download PDF

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Publication number
WO2018105610A1
WO2018105610A1 PCT/JP2017/043644 JP2017043644W WO2018105610A1 WO 2018105610 A1 WO2018105610 A1 WO 2018105610A1 JP 2017043644 W JP2017043644 W JP 2017043644W WO 2018105610 A1 WO2018105610 A1 WO 2018105610A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductive sheet
bus bar
heat conductive
relay
lower member
Prior art date
Application number
PCT/JP2017/043644
Other languages
English (en)
Japanese (ja)
Inventor
徳貴 池尻
巧 江島
清史 川口
麻衣子 小田
健文 鈴木
芳和 小原
Original Assignee
トヨタ自動車株式会社
住友電装株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017221602A external-priority patent/JP6988399B2/ja
Application filed by トヨタ自動車株式会社, 住友電装株式会社 filed Critical トヨタ自動車株式会社
Priority to CN201780073763.0A priority Critical patent/CN110024172B/zh
Priority to US16/466,486 priority patent/US11562869B2/en
Priority to DE112017006147.4T priority patent/DE112017006147T5/de
Publication of WO2018105610A1 publication Critical patent/WO2018105610A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H45/00—Details of relays
    • H01H45/12—Ventilating; Cooling; Heating
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/04—Arrangement of batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H45/00—Details of relays
    • H01H45/02—Bases; Casings; Covers
    • H01H45/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • 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
    • H01M10/6553—Terminals or leads
    • 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
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/02—Arrangements of circuit components or wiring on supporting structure
    • H05K7/06—Arrangements of circuit components or wiring on supporting structure on insulating boards, e.g. wiring harnesses
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/92—Hybrid vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/044—Protecting cover
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a relay unit housed in a battery case.
  • an electric motor for driving the vehicle is mounted.
  • a generator is mounted depending on the vehicle.
  • Such a rotating electric machine that is an electric motor or a generator is connected to a battery via an inverter.
  • a relay is connected between the inverter that is a load of the battery and the battery, and the relay is controlled by the control device, thereby switching an electrical connection state between the battery and the inverter.
  • Patent Document 1 describes a configuration in which a relay is housed in a vehicle, including other electrical components, inside an electrical housing. One end of the bus bar is electrically connected to the contact of the relay, and the other end of the bus bar is electrically connected to the output terminal of the battery block outside the electrical housing. Furthermore, the intermediate part of the bus bar is connected to the chassis constituting the vehicle via an insulating heat radiating sheet outside the electrical housing. Patent Document 1 also describes that the bus bar is not limited to the chassis and may be connected to a housing that houses the battery system. Thereby, it is supposed that the heat generated in the relay can be transferred to the chassis or another housing side to be dissipated.
  • An object of the present invention is to improve the cooling efficiency of a relay in a relay unit housed in a battery case.
  • the relay unit according to the present invention is a relay unit housed in a battery case, and includes a first bus bar, a relay electrically connected to the first bus bar, and a device that covers the first bus bar and the relay.
  • a cover having an upper end closed, and an upper member formed with an opening at the lower end; and the upper cover connected to the upper member so as to close the opening of the upper member.
  • a lower member, and the lower member is formed of a resin having higher heat conductivity than the upper member, and the first bus bar is disposed between the first bus bar and the lower member.
  • the relay unit is connected to the lower member through the first inner heat conductive sheet so as to be able to transfer heat.
  • the first bus bar located in the device cover is connected to the lower member of the device cover so that heat can be transferred.
  • the battery case has a large heat capacity. This makes it easy to dissipate heat generated in the relay to a portion having a large heat capacity at a short distance, so that the cooling efficiency of the relay can be improved.
  • the first bus bar and the lower member are connected via the first inner heat conductive sheet.
  • the lower member is formed of a material that is easily cracked, the lower member can be prevented from colliding with the first bus bar due to vibration and cracking.
  • the lower member is formed of a resin having higher heat conductivity than the upper member.
  • the relay unit includes an outer heat conductive sheet disposed below the lower member, and the first bus bar includes the first inner heat conductive sheet and the lower member. And is connected to the outer heat conductive sheet so as to be capable of transferring heat.
  • the relay unit according to the present invention preferably includes a second bus bar covered by the device cover, and the relay includes the first bus bar and the second bus bar between the first bus bar and the second bus bar.
  • Two bus bars are electrically connected to each other, and a first recess and a second recess partitioned by an insulating wall are formed on the upper surface of the lower member, and the first inner heat conductive sheet is formed in the first recess.
  • first bus bar is disposed on the upper side of the first inner heat conductive sheet in the first recess
  • second inner heat conductive sheet is disposed in the second recess
  • the second bus bar is disposed on the upper side of the second inner heat conductive sheet in the second recess
  • the first bus bar is interposed between the first inner heat conductive sheet and the lower member.
  • the second bus bar is connected to the outer heat conductive sheet through the second inner heat conductive sheet and the lower member so that heat can be transferred to the outer heat conductive sheet. Is done.
  • the 1st inner side heat conductive sheet which contacts a 1st bus bar on the lower side, and the 2nd inner side heat conductive sheet which contacts a 2nd bus bar on the lower side are divided by the insulation wall.
  • the first recess and the second recess are arranged separately.
  • the outer heat conductive sheet is bonded to the lower surface of the lower member, and the outer peripheral surface of the outer heat conductive sheet is disposed on the lower surface of the lower member.
  • a sheet protective wall protruding downward is formed at a portion facing at least a part of the sheet.
  • an external thing or a person contacts an outer side heat conductive sheet at the time of conveyance of the relay unit containing an apparatus cover and an outer side heat conductive sheet, and an outer side heat conductive sheet peels from a lower member. Can be suppressed.
  • the outer heat conductive sheet has a rectangular shape when viewed from one side in the thickness direction, and the sheet protection wall has a rectangular cross section so as to surround the outer heat conductive sheet.
  • the height of the sheet protection wall is greater than the thickness of the outer heat conductive sheet.
  • the sheet protection wall is formed with a notch so that a part in the circumferential direction is exposed on the outer peripheral surface including the lower end of the outer heat conductive sheet.
  • the relay unit including the device cover and the outer heat conductive sheet when the relay unit including the device cover and the outer heat conductive sheet is transported, when the surface film is attached to the lower surface of the outer heat conductive sheet, the outer heat conduction is performed through the notch at the end of the transport. It becomes easy to remove the surface film from the sheet.
  • the relay unit according to the present invention can improve the cooling efficiency of the relay.
  • FIG. 1 It is sectional drawing which takes out and shows the relay unit containing an apparatus cover and a relay from FIG.
  • it is a sectional view showing the state where the 2nd bus bar in a device cover was connected to the case lower side member which constitutes a battery case.
  • the relay unit which comprises the battery relay connection structure of another example of embodiment it is sectional drawing which shows the state from which the outer side heat conductive sheet peeled from the apparatus cover. It is sectional drawing which shows the relay unit which comprises the battery relay connection structure of another example of embodiment. It is the figure seen in the arrow A direction of FIG.
  • it is a sectional view showing the state where the 1st bus bar and the 2nd bus bar in a device cover were connected to the case lower side member which constitutes a battery case. It is the B section enlarged view of FIG.
  • the relay unit which comprises the battery relay connection structure of another example of embodiment it is the figure which abbreviate
  • the relay unit which comprises the battery relay connection structure of another example of embodiment it is a perspective view which shows a part of 1st bus bar and 2nd bus bar arrange
  • the load of the battery is an inverter connected to the motor
  • the embodiment is not limited to such a configuration, and the load may be another electrical component. .
  • FIG. 1 is a circuit diagram showing an in-vehicle battery relay connection structure 10 according to an embodiment.
  • the in-vehicle battery relay connection structure 10 is referred to as a battery relay connection structure 10.
  • the battery relay connection structure 10 is mounted on a vehicle.
  • the vehicle is an electric vehicle or a hybrid vehicle including a motor (not shown) that is a rotating electric machine as a drive source of the vehicle.
  • the vehicle includes an engine as a drive source in addition to the motor.
  • a battery module 12, which is a battery, is connected to the motor via an inverter 50.
  • the battery module 12 constitutes the battery relay connection structure 10.
  • a positive relay 14 and a negative relay 15 are connected between the battery module 12 and the inverter 50.
  • the battery relay connection structure 10 includes a battery module 12, first bus bars 20a, 20b, second bus bars 22a, 22b, a positive relay 14, a negative relay 15, a device cover 30, and a battery case 40.
  • the battery module 12 is configured by electrically connecting a plurality of battery cells in series.
  • the battery module 12 may include a configuration in which some battery cells are connected in parallel.
  • the battery module 12 is accommodated in the battery case 40.
  • FIG. 2 is a cross-sectional view showing the battery module 12 and the device cover 30 arranged in the battery case 40 in the embodiment.
  • the battery case 40 is configured by combining a case lower member 41 and a case upper member 45.
  • the case lower member 41 includes a bottom plate portion 42 and an outer peripheral wall portion 43 erected from the outer peripheral edge of the bottom plate portion 42.
  • the case upper member 45 includes a top plate portion 46 and an outer peripheral wall portion 47 that is connected to the outer peripheral edge of the top plate portion 46 and protrudes downward.
  • the case upper member 45 is coupled to the case lower member 41 by fastening means (not shown) such as a bolt in a state where the case upper member 45 is fitted to the upper side of the case lower member 41 from the outside.
  • Both the case upper member 45 and the case lower member 41 are formed of a metal such as iron or aluminum.
  • the case lower member 41 is formed by die casting of an aluminum alloy. Thereby, the heat dissipation of the case lower member 41 can be increased.
  • a positive relay 14, a negative relay 15, and a device cover 30 are provided inside the battery case 40.
  • the device cover 30 covers the first bus bars 20a, 20b, the second bus bars 22a, 22b, the positive relay 14, and the negative relay 15, that is, covers from the outside.
  • the battery module 12 is fixed on the bottom plate portion 42 of the case lower member 41 of the battery case 40.
  • a plate-like heat insulating material 48 and a heat transfer member 49 are sequentially stacked on the upper side of the bottom plate portion 42, and the battery module 12 is disposed on the upper side of the heat transfer member 49.
  • the heat transfer member 49 is configured by enclosing an endothermic gel, which is an endothermic agent as a refrigerant, in a container formed of an aluminum sheet.
  • the heat transfer member 49 absorbs heat transferred from the battery module 12 to a part of the endothermic gel through the container, and diffuses and dissipates heat throughout the endothermic gel. Thereby, the heat insulation effect between the battery module 12 and the case lower member 41 by the heat insulating material 48 can be enhanced.
  • the heat transfer member 49 disposed between the battery module 12 and the case lower member 41 can be omitted.
  • the bottom of the case lower member 41 of the battery case 40 is exposed to the outside of the vehicle.
  • the case lower member 41 can be cooled by the traveling wind flowing in the direction of the arrow ⁇ in FIG. Since the traveling wind is generally 60 ° C. or lower, the temperature of the battery case 40 that may be higher than 60 ° C. can be lowered by the traveling wind.
  • the battery case 40 is not limited to the configuration in which the case lower member 41 is exposed to the outside of the vehicle.
  • the cooling air is supplied to the periphery of the battery case 40 through a duct by driving a blower motor or the like. It is good also as a structure to cool.
  • the device cover 30 is fixed on the upper side of the case lower member 41 of the battery case 40.
  • the device cover 30 is called a junction BOX and is formed of a resin.
  • the detailed structure of the device cover 30 will be described later with reference to FIG.
  • the first bus bars 20 a, 20 b, the second bus bars 22 a, 22 b, the positive relay 14 and the negative relay 15 are arranged inside the device cover 30.
  • Each of the relays 14 and 15 is configured by housing a relay body inside a relay case 16 made of an insulating material such as resin.
  • the relay body includes two fixed contacts P1, P2, a movable piece R that can be brought into contact with and separated from the fixed contacts P1, P2, and an exciting coil (not shown) that switches a connection state between the movable piece R and the fixed contacts P1, P2. ).
  • Two relay terminals T1 and T2 electrically connected to the fixed contacts P1 and P2 of the relay body are exposed outside the relay case 16 of each relay 14 and 15.
  • Such positive and negative relays 14 and 15 tend to generate heat in the vicinity of the internal fixed contacts P1 and P2.
  • the internal contacts P1 and P2 are connected to relay terminals T1 and T2, and a bus bar described later is connected to the relay terminals T1 and T2. Therefore, in the embodiment, the cooling performance of the relays 14 and 15 is improved by facilitating heat dissipation in portions of the bus bar close to the relay terminals T1 and T2 as described later.
  • one end of the first bus bars 20a and 20b is connected to the relay terminal T1 on the battery module 12 side.
  • the other ends of the first bus bars 20 a and 20 b are connected to battery-side connector terminals T 3 and T 4 attached to the device cover 30.
  • the battery-side connector terminal T3 connected to the positive relay 14 and the positive output terminal Tp of the battery module 12 are connected by a wire line L1 through the service plug SP.
  • the battery-side connector terminal T4 connected to the negative relay 15 and the negative output terminal Tn of the battery module 12 are connected by a wire line L2.
  • the positive electrode output terminal Tp of the battery module 12 and the first bus bar 20a are electrically connected
  • the negative electrode output terminal Tn of the battery module 12 and the first bus bar 20b are electrically connected.
  • the service plug SP is configured so that the power supply circuit can be manually opened and closed by inserting and removing the grip with respect to the housing.
  • one end of the second bus bars 22a and 22b is connected to the relay terminal T2 on the inverter 50 side.
  • the other ends of the second bus bars 22a and 22b are connected to inverter-side connector terminals T5 and T6 attached to the device cover 30.
  • a part of the device cover 30 is integrally attached to the case lower member 41 (FIG. 1) of the battery case 40, and the two inverter-side connector terminals T5 and T6 are located under the case through the integrated part. It is exposed to the outside of the side member 41.
  • the two inverter-side connector terminals T5 and T6 are connected to the positive electrode input terminal T7 and the negative electrode input terminal T8 of the inverter 50 arranged away from the battery case 40 by two wire lines L3 and L4. Thereby, the positive electrode input terminal T7 of the inverter 50 and the second bus bar 22a are electrically connected, and the negative electrode input terminal T8 of the inverter 50 and the second bus bar 22b are electrically connected.
  • Each of the relays 14 and 15 switches the electrical connection state between the battery module 12 and the inverter 50 by switching between energization and stopping of the excitation coil of the relay body. Such switching of the relays 14 and 15 is controlled by a control device (not shown).
  • FIG. 3 is a cross-sectional view showing a state in which the first bus bar 20a in the device cover 30 is connected to the case lower member 41 constituting the battery case 40 in the embodiment.
  • FIG. 3 shows only the first bus bar 20a connected to the positive relay 14 among the four bus bars 20a, 20b, 22a, and 22b shown in FIG. Below, the positive electrode relay 14 may be described as the relay 14.
  • the device cover 30 has a substantially box shape with the upper end closed, and an opening is formed at the lower end.
  • An outward flange 31 is formed around the opening at the lower end of the device cover 30.
  • the flange 31 of the device cover 30 is overlaid on the bottom plate portion 42 of the case lower member 41.
  • the screw portion of the bolt 32 fixed to the case lower member 41 passes through the flange 31 upward, and the nut 33 is coupled to the screw portion protruding from the upper surface of the flange 31.
  • the apparatus cover 30 is fixed to the case lower member 41.
  • a projecting portion 35 that projects inward is formed on the lower surface of the top plate portion 34 positioned at the upper end of the device cover 30, and a bus bar holding claw 35 a is formed at the lower end portion thereof.
  • the bus bar holding claw 35a is bent at a right angle at the lower end and engages and holds the first bus bar 20a on the upper side thereof.
  • the relay case 16 is fixed to the lower surface of the top plate portion 34 of the device cover 30. Further, the relay terminal T1 of the relay body protrudes from one side surface of the relay case 16 in the lateral direction (left side surface in FIG. 3). Then, one end of the first bus bar 20a is connected to the relay terminal T1 outside the one lateral side surface of the relay case 16. The intermediate portion of the first bus bar 20a passes through the lower side of the relay case 16 in the lateral direction (left-right direction in FIG. 3) and is led out to the other lateral side of the relay case 16 (right side in FIG. 3).
  • the other end portion of the first bus bar 20 a is held by a bus bar holding claw 35 a formed on the device cover 30, and the other end portion of the first bus bar 20 a is a battery side connector terminal T 3 (exposed to the outside of the device cover 30). 1).
  • One end of a wire L1 (FIG. 1) electrically connected to the battery module 12 is connected to the battery-side connector terminal T3 outside the device cover 30.
  • the intermediate portion of the first bus bar 20a is sandwiched between the lower side surface of the relay case 16 and the upper side surface of the case lower member 41 of the battery case 40 via two insulating heat conductive sheets 36 and 37 on both upper and lower sides. It is.
  • the lower heat conductive sheet 37 corresponds to an inner heat conductive sheet.
  • the intermediate part of the 1st bus-bar 20a is connected to the relay case 16 via the upper heat conductive sheet 36 so that heat transfer is possible.
  • the intermediate portion of the first bus bar 20a is connected to the case lower member 41 through the lower heat conductive sheet 37 so that heat can be transferred.
  • the upper heat conductive sheet 36 between the intermediate portion of the first bus bar 20a and the relay case 16 may be omitted, and the intermediate portion of the first bus bar 20a may directly contact the lower surface of the relay case 16. This also enables heat to be transferred from the relay case 16 to the intermediate portion of the first bus bar 20a.
  • “connected so that heat can be transferred” means that two members are connected through one or more members having heat transfer properties, and that the two members are in direct contact to transfer heat. Including the meaning of
  • a heat dissipation path that is sequentially transmitted is formed.
  • the heat transmitted to the case lower member 41 is transmitted (dissipated) to the outside air.
  • the first bus bar 20a located in the device cover 30 is connected to the battery case 40 so as to be able to transfer heat.
  • the case lower member 41 as a heat dissipation portion from the contact of the relay 14 is used. It is easy to reduce the distance.
  • the case lower member 41 is larger than the device cover 30 and has a larger heat capacity. This makes it easy to dissipate the heat generated in the relay 14 to a portion having a large heat capacity at a short distance, so that the cooling efficiency of the relay 14 can be improved.
  • the middle portion of the bus bar connected to the relay accommodates the chassis or battery system that constitutes the vehicle outside the electrical housing corresponding to the device cover. Connected to the housing.
  • the distance of the heat radiation path from the relay to the portion having a large heat capacity tends to be large. This makes it difficult to increase the cooling efficiency of the relay.
  • the cooling efficiency of the relay 14 can be further increased.
  • the device cover 30 is fastened to the case lower member 41 by fastening means including bolts and nuts, so that the heat conductive sheet is interposed between the relay case 16 and the case lower member 41 via the first bus bar 20a.
  • 36 and 37 can also be compressed. Thereby, since the heat conductive sheets 36 and 37 can be brought into contact with each other between the relay case 16, the first bus bar 20 a, and the case lower member 41 with high adhesion, heat conductivity can be further increased.
  • FIG. 3 only the heat dissipation structure including the first bus bar 20a connected to the positive relay 14 among the four bus bars 20a, 20b, 22a, and 22b illustrated in FIG. 1 has been described.
  • the heat dissipation structure is similarly configured for 20b, 22a, and 22b.
  • one end of the second bus bar 22a (FIG. 1) can be connected to a relay terminal protruding to the other side in the horizontal direction of the positive relay 14 (right side in FIG. 3).
  • the intermediate portion of the second bus bar 22a is passed under the relay case 16, and the other end portion of the second bus bar 22a is opposite to the other end portion of the first bus bar 20a (see FIG. 3 (left side of 3).
  • FIG. 4 is a cross-sectional view showing a state in which the first bus bar 20a in the device cover 30 is connected to the case lower member 41 constituting the battery case 40 in another example of the embodiment.
  • the device cover 30 includes a cover lower member 38 arranged so as to close the opening at the lower end.
  • the cover lower member 38 is formed in a plate shape from a resin having high heat conductivity.
  • the intermediate portion of the first bus bars 20a, 20b is sandwiched between the relay case 16 and the cover lower member 38 via the two heat conduction sheets 36, 37 on the upper and lower sides.
  • the second heat conductive sheet 39 made of an insulating material such as resin is sandwiched between the lower side surface of the cover lower side member 38 and the case lower side member 41 of the battery case 40.
  • the second heat conductive sheet 39 corresponds to an outer heat conductive sheet.
  • the resin lower cover member 38 and the second heat conductive sheet 39 made of an insulating material are disposed between the case lower member 41 and the first bus bar 20a, so the first bus bar 20a. And the case lower member 41 can be further improved in insulation.
  • the heat conductive sheet 36 on the upper side of the first bus bar 20a may be omitted as in the configurations of FIGS. 4, only the heat dissipation structure including the first bus bar 20a connected to the positive relay 14 among the four bus bars 20a, 20b, 22a, and 22b illustrated in FIG. 1 has been described.
  • the heat dissipation structure is similarly configured for 22a and 22b. Further, only one of the first bus bar and the second bus bar can be connected to the case lower member 41 so that heat can be transferred.
  • Other configurations and operations are the same as those in FIGS. 1 to 3.
  • FIG. 5 is a cross-sectional view showing a state where the first bus bar 20a in the device cover 60 is connected to a case lower member 41a constituting the battery case 40a in another example of the embodiment.
  • 6 is a cross-sectional view showing the relay unit 13 including the device cover 60 and the positive relay 14 taken out from FIG.
  • FIG. 7 is a cross-sectional view showing a state where the second bus bar 22a in the device cover 60 is connected to the case lower member 41a.
  • the battery case 40a constituting the battery relay connection structure is configured such that the case upper member 45 is overlapped and coupled to the upper surface of the flat case lower member 41a.
  • the case lower member 41a is formed of a metal such as iron or aluminum in the same manner as the configurations of the above examples.
  • the case lower member 41a has a substantially rectangular shape when viewed from above, and an outer peripheral wall portion 51 is formed on the outer peripheral edge of the upper surface over the entire periphery.
  • a recess 52 is formed inside the outer peripheral wall 51 on the upper surface of the case lower member 41a.
  • a protrusion 53 having a rectangular cross section is formed to protrude from a plurality of positions on the bottom surface of the recess 52.
  • Each protrusion 53 is formed so as to face the lower side of the device cover 60 of each of the positive electrode relay 14 and the negative electrode relay 15 (FIG. 1). The entire outer peripheral surface of each protrusion 53 is surrounded by the recess 52. As will be described later, each protrusion 53 is pressed against the cover lower member 61 constituting the device cover 60 via the outer heat conductive sheet 65.
  • the case upper member 45 is superposed on the upper surface of the outer peripheral wall portion 51 of the case lower member 41a and is coupled by fastening means (not shown) such as a bolt. Thereby, the battery case 40a forms a waterproof structure by blocking the internal space from the outside.
  • the positive and negative relay units 13 are fixed inside the battery case 40a. Since the configuration of the negative relay unit is the same as that of the positive relay unit 13, the positive relay unit 13 will be described below. As shown in FIGS. 6 and 7, the relay unit 13 includes a device cover 60, a positive relay 14 disposed inside the device cover 60, a first bus bar 20 a, a second bus bar 22 a, and a first inner heat conductive sheet 66. The second inner heat conductive sheet 67 and the outer heat conductive sheet 65 are included.
  • the device cover 60 is configured by combining a cover upper member 62 and a cover lower member 61.
  • the cover upper member 62 has a substantially box shape with the upper end closed by the top plate portion 63, and an opening is formed at the lower end.
  • the cover lower member 61 has a substantially flat plate shape and is coupled to the cover upper member 62 by fastening means (not shown) such as a bolt so as to close the opening at the lower end of the cover upper member 62.
  • the cover upper member 62 is made of an insulating resin.
  • the cover lower member 61 is made of a resin having higher heat conductivity than the cover upper member 62.
  • the cover lower member 61 is preferably formed of a resin having a thermal conductivity that is five times or more that of the resin forming the cover upper member 62.
  • the thermal conductivity of the resin forming the cover upper member 62 is about 0.2 W / mK
  • the thermal conductivity of the resin forming the cover lower member 61 is 1.0 to 3.5 W / mK.
  • the cover lower member 61 can be made of a nylon resin filled with a filler to increase the thermal conductivity.
  • PBT polybutylene terephthalate resin
  • the cover upper member 62 is coupled to the case lower member 41a of the battery case 40a by a fastening member (not shown) such as a bolt penetrating a flange (not shown) formed on the outer peripheral portion of the lower end.
  • one end of the first bus bar 20a is outside the longitudinal side surface of the relay case 16 (the left side surface in FIGS. 5 and 6), and the relay terminal Connected to T1.
  • the intermediate portion of the first bus bar 20a in the longitudinal direction passes through the lower side of the relay case 16 in the longitudinal direction of the relay case (left and right direction in FIGS. 5 and 6), and the other longitudinal side of the relay case (in FIGS. 5 and 6). To the right).
  • the other end portion of the first bus bar 20 a is coupled to the top plate portion 63 of the cover upper member 62 together with one end portion of an intermediate bus bar (not shown) on the other longitudinal side of the relay case 16.
  • the other end of the intermediate bus bar is connected to a battery-side connector terminal T3 (FIG. 1) that is exposed to the outside of the device cover 60.
  • one end of the second bus bar 22a is connected to the relay terminal T2 outside the one longitudinal side surface (the left side surface in FIG. 7) of the relay case 16.
  • the middle portion in the longitudinal direction of the second bus bar 22a enters the lower side of the relay case 16 and extends in the width direction perpendicular to the longitudinal direction on the lower side of the relay case (the front and back direction in FIG. 7). It is derived
  • the other end of the second bus bar 22a is connected to the inverter-side connector terminal T5 (FIG. 1) exposed on the outside of the device cover 60 on one side in the width direction of the relay case 16.
  • the positive relay 14 is electrically connected to each of the first bus bar 20a and the second bus bar 22a between the first bus bar 20a and the second bus bar 22a.
  • the first inner heat conductive sheet 66 is an insulating resin sheet having high heat conductivity, and is sandwiched between the lower end surface of the first bus bar 20 a and the cover lower member 61. .
  • the first inner heat conductive sheet 66 is preferably formed from a non-silicone resin material. Thereby, even when the temperature of the first inner heat conductive sheet 66 rises during use, no siloxane gas is generated, so that it is possible to prevent relay contact failure due to the siloxane gas.
  • the second inner heat conductive sheet 67 is an insulating resin sheet having high heat conductivity, and is sandwiched between the lower end surface of the second bus bar 22 a and the cover lower member 61.
  • the second inner heat conductive sheet 67 is preferably formed from a non-silicone resin material.
  • Each of the first inner heat conductive sheet 66 and the second inner heat conductive sheet 66 has a lower surface hardness than the cover lower member 61.
  • the first inner heat conductive sheet 66 and the second inner heat conductive sheet 67 may be formed using, for example, a low-hardness acrylic resin.
  • the first inner heat conductive sheet 66 and the second inner heat conductive sheet 67 are arranged apart from each other.
  • the outer heat conductive sheet 65 is a resin sheet having high heat conductivity, and is sandwiched between the upper surface of the protrusion 53 formed on the case lower member 41a of the battery case 40a and the cover lower member 61.
  • the outer heat conductive sheet 65 has a rectangular shape when viewed from one side in the thickness direction.
  • the outer heat conductive sheet 65 has substantially the same size as the outer shape of the upper surface of the protrusion 53 of the case lower member 41a, for example.
  • the outer heat conductive sheet 65 has a lower surface hardness than the cover lower member 61.
  • the outer heat conductive sheet 65 may be formed of the same material as each of the inner heat conductive sheets 66 and 67 described above.
  • the outer heat conductive sheet 65 is at least partly a first inner heat conductive sheet 66 and a second inner heat conductive sheet 67, and a cover lower member. 61 are arranged so as to overlap with each other.
  • the cover lower member 61 is not in direct contact with the case lower member 41 a and is connected to the case lower member 41 a via the outer heat conductive sheet 65.
  • the protrusion 53 of the case lower member 41 a is pressed against the cover lower member 61 via the outer heat conductive sheet 65.
  • the outer heat conductive sheet 65 is bonded to the lower surface of the cover lower member 61 to form the relay unit 13.
  • the first bus bar 20a is connected to the outer heat conductive sheet 65 through the first inner heat conductive sheet 66 and the cover lower member 61 so as to be able to transfer heat.
  • the second bus bar 22a is connected to the outer heat conductive sheet 65 through the second inner heat conductive sheet 67 and the cover lower member 61 so as to be able to transfer heat.
  • the first bus bar 20a is connected to the cover lower member 61 via the first inner heat conductive sheet 66 so as to be able to transfer heat, and the outer heat conductive sheet which is another lower member from the cover lower member 61. 65 and heat transfer to the battery case 40a.
  • the second bus bar 22a is connected to the cover lower member 61 via the second inner heat conductive sheet 67 so as to be able to transfer heat, and from the cover lower member 61 to the outer heat conductive sheet 65 and the battery case 40a. Heat transfer is possible.
  • the heat generated at the contact inside the positive relay 14 is transmitted to the case lower member 41a as shown by the broken line arrow in FIG. Specifically, the heat is sequentially applied in the order of contact in the relay ⁇ relay terminal T1 ⁇ first bus bar 20a ⁇ first inner heat conductive sheet 66 ⁇ cover lower member 61 ⁇ outer heat conductive sheet 65 ⁇ case lower member 41a. Is transmitted. Further, as indicated by broken line arrows in FIG. 7, the contact inside the relay ⁇ the relay terminal T2 ⁇ the second bus bar 22a ⁇ the second inner heat conductive sheet 67 ⁇ the cover lower member 61 ⁇ the outer heat conductive sheet 65 ⁇ the case lower member. As in 41a, heat is transferred in order. The heat transmitted to the case lower member 41a is transmitted to the outside air (dissipated), so that the heat of the relay can be released.
  • the cover lower member 61 when the cover lower member 61 is connected to the battery case 40a so that heat can be transferred, from the relay contact to the battery case 40a as the heat radiating portion in the heat dissipation path of the relay. Easy to reduce the distance. Further, the battery case 40a has a large heat capacity. This makes it easy to dissipate heat generated in the relay to a portion having a large heat capacity at a short distance, so that the cooling efficiency of the relay can be improved. Further, the first bus bar 20a and the second bus bar 22a and the cover lower member 61 are connected via the first inner heat conductive sheet 66 or the second inner heat conductive sheet 67 so as to be able to transfer heat.
  • the cover lower member 61 is formed of a material that is easily broken, it is possible to prevent the cover lower member 61 from colliding with the first bus bar 20a and the second bus bar 22a by vibration and cracking.
  • the first bus bar 20a and the second bus bar 22a are connected to the outer heat conductive sheet 65 via the first inner heat conductive sheet or the second inner heat conductive sheet 67 and the cover lower member so as to be able to transfer heat.
  • the battery case 40 a is connected to the lower side of the cover lower member 61 via the first inner heat conductive sheet or the second inner heat conductive sheet 67.
  • one inner heat conductive sheet can be used in common instead of the first inner heat conductive sheet 66 and the second inner heat conductive sheet 67.
  • the heat transmitted to the first bus bar 20a and the second bus bar 22a is transmitted to the case lower member 41a through the heat dissipation path including the inner heat conductive sheet.
  • FIG. 8 is a cross-sectional view showing a state in which the outer heat conductive sheet 65 is peeled off from the device cover 60 in the relay unit 13 constituting the battery relay connection structure of another example of the embodiment.
  • illustration of the first bus bar, the second bus bar, the first inner heat conductive sheet, and the second inner heat conductive sheet is omitted.
  • an outer heat conductive sheet 65 is bonded to the lower surface of the cover lower member 61.
  • the outer heat conductive sheet 65 may be peeled off from the cover lower member 61. Further, when the moving member moves in a state where the relay unit 13 is disposed on the moving member (not shown), the device cover 60 of the relay unit 13 vibrates, and the outer heat conductive sheet 65 becomes the cover lower member. There is also a possibility that the position slips with respect to 61.
  • the heat transfer performance of the outer heat conductive sheet 65 may be reduced.
  • FIG. 9 is a cross-sectional view showing a relay unit 13a constituting another example of the embodiment.
  • FIG. 10 is a diagram viewed in the direction of arrow A in FIG. In FIG. 9, as in FIG. 8, the first bus bar, the second bus bar, the first inner heat conductive sheet, and the second inner heat conductive sheet are not shown.
  • the outer heat conductive sheet 65 is bonded to the lower surface of the cover lower member 61a constituting the device cover 60a. Further, on the lower surface of the cover lower member 61a, a sheet protective wall 70 protruding downward is formed at a portion facing at least a part of the outer peripheral surface of the outer heat conductive sheet 65.
  • the sheet protection wall 70 is formed in a cylindrical shape having a substantially rectangular cross section so as to surround the outer heat conductive sheet 65. The height of the sheet protection wall 70 is larger than the thickness of the outer heat conductive sheet 65.
  • a notch 71 is formed in a part of the sheet protective wall 70 in the circumferential direction and facing a part of the outer peripheral surface of the outer heat conductive sheet 65 over the entire length in the height direction of the sheet protective wall 70. Is done. Thereby, the notch 71 is formed so that a part in the circumferential direction is exposed on the outer peripheral surface including the lower end of the outer heat conductive sheet 65.
  • a surface film (not shown) is attached to the lower surface of the outer heat conductive sheet 65 to prevent foreign matter from adhering to the lower surface during transport of the relay unit 13a. The surface film is removed before the relay unit 13a is assembled to the battery case.
  • the sheet protective wall 70 protruding downward is formed on the lower surface of the cover lower member 61a at a portion facing at least a part of the outer peripheral surface of the outer heat conductive sheet 65.
  • the sheet protection wall 70 is formed in a cylindrical shape having a substantially rectangular cross section so as to surround the outer heat conductive sheet 65 on the lower surface of the cover lower member 61a. It is larger than the thickness of the conductive sheet 65. Thereby, it can suppress more that the outer side heat conductive sheet 65 peels from the cover lower side member 61a.
  • a cutout 71 is formed in the sheet protection wall 70 so that a part in the circumferential direction is exposed on the outer peripheral surface including the lower end of the outer heat conductive sheet 65.
  • the operator can easily remove the surface film from the outer heat conductive sheet 65 by causing the finger to enter the inside of the sheet protective wall 70 through the notch 71 and hooking the finger on the surface film sticking side.
  • Other configurations and operations are the same as those in FIGS. 1 to 3, 4, or 5 to 7.
  • FIG. 11 is a cross-sectional view showing a state where the first bus bar 20a and the second bus bar 22a in the device cover 60b are connected to the case lower member 41b constituting the battery case 40b in another example of the embodiment.
  • FIG. 12 is an enlarged view of a portion B in FIG.
  • FIG. 13 is a view of the relay unit 13b constituting the battery relay connection structure as seen from below with a part omitted, with the cover lower member 61b (FIG. 12) of the device cover removed.
  • FIG. 14 is a perspective view showing a part of the first bus bar 20a and the second bus bar 22a arranged in the cover lower member 61b in the relay unit 13b.
  • the battery case 40b is formed by connecting the case upper member 45a and the case lower member 41b with a bolt 72.
  • a device cover 60b forming the relay unit 13b is fixed to the case lower member 41b.
  • the device cover 60b is formed by connecting the cover upper member 62a and the cover lower member 61b.
  • the positive relay 14 is fixed to the cover upper member 62a inside the device cover 60b.
  • the longitudinal intermediate portions of the first bus bar 20a and the second bus bar 22a are arranged in the width direction of the relay case 16 (up and down in FIG. 13) on the lower side of the positive relay 14 (the front side of the paper surface of FIG. 13). Are arranged side by side.
  • a protrusion 21 protruding to one side in the width direction of the relay case 16 (the lower side in FIG. 13) is formed at a portion disposed below the relay case 16. . 11 and 12 correspond to the CC cross section of FIG.
  • the protrusion 21 is arranged in a longitudinally intermediate portion of the second bus bar 22a on the lower side of the relay case 16 and in the longitudinal direction of the relay case 16 (left and right directions in FIGS. 11, 12, and 13). Be placed.
  • the first bus bar 20a and the second bus bar 22a are arranged apart from each other. As shown in FIG. 13, the other end portion (the right end portion in FIG. 13) of the first bus bar 20a is the other side in the width direction of the relay case 16 (the upper side in FIG. 13), together with an intermediate bus bar (not shown). Screwed to the upper member 62a.
  • the other end (the lower end in FIG. 13) of the second bus bar 22a is screwed to the cover upper member 62a on one side in the width direction of the relay case 16 (the lower side in FIG. 13) and is connected to the inverter side connector terminal T5. (Fig. 1).
  • a first recess 74 and a second recess 75 partitioned by an insulating wall 73 are formed on the upper surface of the cover lower member 61b constituting the device cover 60b.
  • the insulating wall 73 is a double wall and is formed by two wall portions 73a and 73b.
  • each of the wall portions 73a and 73b is L-shaped when viewed from above, with a gap therebetween. Formed side by side.
  • a concave portion 73c at the intermediate portion in the width direction is formed in the insulating wall 73 over the entire length.
  • a first inner heat conductive sheet 66 is disposed at the lower end of the first recess 74.
  • a flat plate-shaped intermediate portion located at the lower end of the first bus bar 20a is disposed on the upper side of the first inner heat conductive sheet 66 in the first recess 74 so as to overlap therewith.
  • a second inner heat conductive sheet 67 is disposed at the lower end of the second recess 75.
  • a flat plate-like middle portion in the longitudinal direction located at the lower end of the second bus bar 22a is overlaid on the upper side of the second inner heat conductive sheet 67 in the second recess 75.
  • the first inner heat conductive sheet 66 is L-shaped
  • the second inner heat conductive sheet 67 is rectangular.
  • the first inner heat conductive sheet 66 that contacts the first bus bar 20a on the lower side and the second inner heat conductive sheet 67 that contacts the second bus bar 22a on the lower side are separated by the insulating wall 73.
  • the first concave portion 74 and the second concave portion 75 are divided and arranged.
  • first bus bars 20a and 20b are electrically connected to the output terminal of the battery module 12 and the second bus bars 22a and 22b are electrically connected to the input terminal of the load
  • first bus bar may be electrically connected to the input terminal of the load
  • second bus bar may be electrically connected to the output terminal of the battery.
  • at least one of the first bus bar and the second bus bar is connected to the case lower member 41 of the battery case 40 so as to be able to transfer heat
  • the one bus bar may be connected to the case upper member of the battery case so that heat can be transferred.
  • the relay units 13, 13a, 13b have been described as including the outer heat conductive sheet 65.
  • the relay unit may not include the outer heat conductive sheet.
  • the outer heat conductive sheet can be provided on the relay unit side in the battery case.

Abstract

L'invention concerne une unité de relais comprenant : une première barre omnibus; un relais connecté électriquement à la première barre omnibus; et un couvercle d'appareil pour recouvrir la première barre omnibus et le relais. Le couvercle d'appareil comprend : un élément supérieur en forme de boîte ayant une extrémité supérieure recouverte, ledit élément supérieur ayant une ouverture formée dans une extrémité inférieure; et un élément inférieur lié à l'élément supérieur de sorte que l'ouverture de l'élément supérieur soit recouverte par l'élément inférieur. L'élément inférieur est formé d'une résine ayant une conductivité thermique supérieure à celle de l'élément supérieur. La première barre omnibus est reliée à l'élément inférieur par l'intermédiaire d'une première feuille conductrice de chaleur interne de sorte que la chaleur peut être transférée à l'élément inférieur, ladite première feuille conductrice de chaleur interne étant disposée entre la première barre omnibus et l'élément inférieur.
PCT/JP2017/043644 2016-12-05 2017-12-05 Unité de relais WO2018105610A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780073763.0A CN110024172B (zh) 2016-12-05 2017-12-05 继电器单元
US16/466,486 US11562869B2 (en) 2016-12-05 2017-12-05 Relay unit
DE112017006147.4T DE112017006147T5 (de) 2016-12-05 2017-12-05 Relais-einheit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2016-235707 2016-12-05
JP2016235707 2016-12-05
JP2017221602A JP6988399B2 (ja) 2016-12-05 2017-11-17 車載用バッテリリレー接続構造
JP2017-221602 2017-11-17

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Publication Number Publication Date
WO2018105610A1 true WO2018105610A1 (fr) 2018-06-14

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PCT/JP2017/043644 WO2018105610A1 (fr) 2016-12-05 2017-12-05 Unité de relais

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CN (1) CN110024172B (fr)
WO (1) WO2018105610A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2021010119A1 (fr) * 2019-07-15 2021-01-21 株式会社オートネットワーク技術研究所 Agencement de circuit
WO2021192919A1 (fr) * 2020-03-24 2021-09-30 住友電装株式会社 Boîte de jonction électrique
WO2021230125A1 (fr) * 2020-05-15 2021-11-18 株式会社オートネットワーク技術研究所 Structure de circuit
WO2022168649A1 (fr) * 2021-02-04 2022-08-11 住友電装株式会社 Boîte de jonction électrique
CN115275492A (zh) * 2021-04-29 2022-11-01 保时捷股份公司 机动车辆的牵引电池
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WO2022168649A1 (fr) * 2021-02-04 2022-08-11 住友電装株式会社 Boîte de jonction électrique
CN115275492A (zh) * 2021-04-29 2022-11-01 保时捷股份公司 机动车辆的牵引电池
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