WO2023162881A1 - バッテリー遮断ユニット - Google Patents

バッテリー遮断ユニット Download PDF

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Publication number
WO2023162881A1
WO2023162881A1 PCT/JP2023/005702 JP2023005702W WO2023162881A1 WO 2023162881 A1 WO2023162881 A1 WO 2023162881A1 JP 2023005702 W JP2023005702 W JP 2023005702W WO 2023162881 A1 WO2023162881 A1 WO 2023162881A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuse
heat sink
heat
cooler
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/005702
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
暁希 篠倉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to CN202380021776.9A priority Critical patent/CN118695955A/zh
Priority to JP2024503107A priority patent/JP7486097B2/ja
Priority to US18/836,806 priority patent/US20250167338A1/en
Publication of WO2023162881A1 publication Critical patent/WO2023162881A1/ja
Priority to JP2024069215A priority patent/JP2024100766A/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H01M10/6567—Liquids
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/651—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
    • 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
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • 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
    • 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
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • 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
    • 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 disclosure relates to a battery cutoff unit.
  • a power control unit with a power device is used in automobiles or electrical products.
  • a battery disconnect unit BDU that can cut off or supply power output from a battery.
  • a battery cut-off unit is used, for example, in a drive system of an electric vehicle such as a hybrid electric vehicle or a pure electric vehicle (see Patent Document 1).
  • a drive system for such an electric vehicle includes a battery that outputs DC power as drive energy for running the electric vehicle, a battery cutoff unit that controls the supply and cutoff of the DC power output from the battery, and a battery cutoff unit. and an inverter that converts the DC power supplied from the inverter into AC power, and a motor that is driven by the AC power output from the inverter to rotationally drive the wheels of the vehicle.
  • the battery cutoff unit is equipped with electronic components such as relays and fuses.
  • the relay switches between cutoff and supply of DC power supplied from the battery to the inverter.
  • the fuse cuts off the circuit when an abnormal current occurs.
  • a bus bar is connected to the terminals of the relay and the terminals of the fuse.
  • the heat capacity in the vicinity of the heat source has a large effect on rapid heat generation in a short period of time. is difficult to suppress.
  • the battery cutoff unit requires an insulation structure that secures sufficient space and creepage to handle large currents and high voltages. may lead to In other words, when trying to achieve both heat dissipation and insulation, there is a problem that the size of the battery cutoff unit increases.
  • the present disclosure has been made to solve such problems, and aims to provide a battery cut-off unit that can achieve both heat dissipation and insulation while achieving miniaturization.
  • one aspect of the battery cutoff unit includes a fuse, a bus bar connected to terminals of the fuse, and a heat sink in contact with the terminals of the fuse.
  • the terminals of the fuse are positioned between the busbar and the heat sink, and the terminals of the fuse, the busbar and the heat sink are fixed by fastening members.
  • FIG. 1 is a block diagram of a drive system according to an embodiment
  • FIG. 1 is an external perspective view of a battery cutoff unit according to an embodiment
  • FIG. FIG. 3 is a perspective view of the battery cutoff unit with the upper cover removed
  • 1 is an exploded perspective view of a battery cutoff unit according to an embodiment
  • FIG. FIG. 4 is a cross-sectional view of the battery cutoff unit according to the embodiment when cut along a plane passing through a screw inserted through a terminal of a relay
  • FIG. 4 is a cross-sectional view of the battery cutoff unit according to the embodiment when cut along a plane passing through a screw inserted through a terminal of a fuse
  • FIG. 1 is a block diagram of a drive system according to an embodiment
  • FIG. 1 is an external perspective view of a battery cutoff unit according to an embodiment
  • FIG. FIG. 3 is a perspective view of the battery cutoff unit with the upper cover removed
  • 1 is an exploded perspective view of a battery cutoff unit according to an embodiment
  • FIG. 6 is an enlarged cross-sectional view of a region VII enclosed by a dashed line in FIG. 5;
  • FIG. 7 is an enlarged cross-sectional view of a region VIII surrounded by broken lines in FIG. 6;
  • FIG. 8 is a cross-sectional view of a battery cutoff unit according to Modification 1;
  • FIG. 11 is a cross-sectional view of a battery cutoff unit according to Modification 2;
  • FIG. 11 is a cross-sectional view of a battery cutoff unit according to Modification 3;
  • FIG. 11 is a diagram showing a configuration of a module structure used in a battery cutoff unit according to Modification 4;
  • FIG. 11 is a cross-sectional view of a battery cutoff unit according to Modification 4;
  • each figure is a schematic diagram and is not necessarily strictly illustrated. Moreover, in each figure, the same code
  • FIG. 1 is a block diagram of a drive system 100 according to an embodiment.
  • the drive system 100 includes a battery cutoff unit 1, a battery 2, and an inverter 3.
  • the battery cutoff unit 1 is an example of a power control unit.
  • the battery cutoff unit 1 is connected between the battery 2 and the inverter 3 and cuts off DC power output from the battery 2 and supplies the DC power to the inverter 3 . That is, the battery cutoff unit 1 can switch between a power supply state in which power is supplied to the inverter 3 and a power cutoff state in which power to the inverter 3 is cut off.
  • the battery cutoff unit 1 may be connected not only to the inverter 3 but also to a rapid charging circuit. In this case, the battery cutoff unit 1 can switch the output destination of the DC power output from the battery 2 to the inverter 3 or the rapid charging circuit. The battery cutoff unit 1 can also switch between a power supply state in which power is supplied to the quick charge circuit and a power cutoff state in which power to the quick charge circuit is cut off.
  • the battery 2 is a power storage device such as a secondary battery. DC power is output from the battery 2 . Therefore, the battery 2 connected to the battery cutoff unit 1 supplies DC power to the battery cutoff unit 1 .
  • the battery 2 is, for example, a lithium ion secondary battery, but is not limited to this.
  • the inverter 3 is an AC/DC converter that converts the DC power supplied from the battery cutoff unit 1 into AC power. Although not shown, the inverter 3 is connected to, for example, a motor, and the motor connected to the inverter 3 is driven by AC power output from the inverter 3 .
  • the drive system 100 configured in this way is mounted on an electric vehicle such as a hybrid electric vehicle or a pure electric vehicle. That is, the battery cutoff unit 1 is mounted on an electric vehicle.
  • the DC power output from the battery 2 is supplied to the inverter 3 via the battery cutoff unit 1 as driving energy for running the electric vehicle, and is converted into AC power.
  • the AC power output from the inverter 3 is supplied to a motor for rotating the wheels of the vehicle.
  • FIG. 2 is an external perspective view of the battery cutoff unit 1 according to the embodiment.
  • FIG. 3 is a perspective view of the battery cutoff unit 1 with the upper cover 71 removed.
  • FIG. 4 is an exploded perspective view of the battery cutoff unit 1 according to the embodiment.
  • 5 and 6 are cross-sectional views of the battery cutoff unit 1 according to the embodiment. 5 is a sectional view taken along a plane passing through the screw 81, and FIG. 6 is a sectional view taken along a plane passing through the screw 82.
  • screws such as the screws 81 and 82 are not shown in FIG. 5 and 6 basically show only the portion appearing in the cross section.
  • the battery cutoff unit 1 includes a relay 10 and a fuse 20.
  • the battery cutoff unit 1 may include electronic components such as a current sensor and a resistor.
  • the relay 10 is an electronic component that has the function of turning power on and off. Specifically, the relay 10 has a function of switching between cutoff and supply of DC power supplied from the battery 2 to the battery cutoff unit 1 to the inverter 3 .
  • the relay 10 is an example of a power device and generates heat. That is, the relay 10 is a heat-generating component that generates heat.
  • the relay 10 has a pair of terminals 11 and an insulating case 12 to which the pair of terminals 11 are fixed.
  • a pair of terminals 11 are fixed terminals.
  • a pair of terminals 11 are external connection terminals connected to an external member. Specifically, each of the pair of terminals 11 is connected to the bus bar 30 .
  • the pair of terminals 11 are metal terminals made of a metal material. In FIG. 5, the pair of terminals 11 are illustrated as being connected by an integral member, but are electrically separated by an insulating member inserted between the pair of terminals 11 .
  • the relay 10 has a movable contact that contacts and separates from one of the pair of terminals 11 that are fixed terminals.
  • the relay 10 can cut off current or supply current by contacting or separating the movable contact with the fixed terminal.
  • the case 12 is, for example, a resin case made of a resin material. A movable contact is housed in this case 12 .
  • the relay 10 further has an insulating plate 12a positioned between the pair of terminals 11. As shown in FIG.
  • the insulating plate 12 a is an insulating wall that partitions the pair of terminals 11 .
  • the insulating plate 12a is a part of the case 12, and is provided in an upright position on the upper plate portion of the case 12. As shown in FIG.
  • At least one relay 10 is arranged in the battery cutoff unit 1.
  • the battery cutoff unit 1 includes multiple relays 10 .
  • the plurality of relays 10 includes a first P-side main relay corresponding to the P-side electrode of the battery 2 and a second N-side main relay corresponding to the N-side electrode of the battery 2 .
  • the battery cutoff unit 1 has a quick charge circuit, among the plurality of relays 10, there are a first P-side QC relay corresponding to the P-side electrode of the battery 2 and a first QC relay corresponding to the N-side electrode of the battery 2.
  • a second QC relay on the N side may be included.
  • the fuse 20 is an electronic component that has the function of breaking the circuit when an abnormal current occurs.
  • the fuse 20 has a function of cutting off current when an overcurrent flows.
  • the fuse 20 is a heat generating component that generates heat.
  • the fuse 20 has a pair of terminals 21 and a case 22.
  • a pair of terminals 21 are external connection terminals connected to an external member. Specifically, each of the pair of terminals 21 is connected to the bus bar 30 .
  • the pair of terminals 21 are metal terminals made of a metal material.
  • a pair of terminals 21 are provided on the case 22 so as to protrude from the side surfaces of the case 22 .
  • the fuse 20 is of a passive type, and is a blown fuse (current fuse) that blows when overcurrent flows. In this case, a fusing portion is provided in the case 22 .
  • the fuse 20 is not limited to a passive type fuse, and may be an active type fuse that cuts off current by a control signal. Active type fuses are, for example, pyrofuses.
  • the battery cutoff unit 1 includes a busbar 30, a heat sink 40, a cooler 50, insulating sheets 61 and 62, and a housing .
  • the bus bar 30 is a wiring member through which current flows, and constitutes an energization path.
  • the busbar 30 is connected to electronic components within the battery cutoff unit 1 . Busbar 30 generates heat due to the current flowing through busbar 30 .
  • At least one busbar 30 is arranged in the battery cutoff unit 1 .
  • a plurality of busbars 30 are arranged in this embodiment.
  • the busbars 30 include a busbar 31 (first busbar) connected to the relay 10 .
  • busbar 31 is connected to terminal 11 of relay 10 .
  • bus bar 31 is connected to terminal 11 (fixed terminal) of relay 10 .
  • the plurality of bus bars 30 include a bus bar 32 (second bus bar) connected to the fuse 20 .
  • busbar 32 is connected to terminal 21 of fuse 20 .
  • the plurality of busbars 30 includes internal busbars that are not entirely exposed from the housing 70 and external busbars that are partially exposed from the housing 70 .
  • An internal busbar connects, for example, two electronic components. In this case, one end of the internal busbar is connected to one of the two electronic components, and the other end of the internal busbar is connected to the other of the two electronic components.
  • the external busbar is connected to one electronic component, for example. In this case, one end of the external bus bar is connected to the electronic component, and the other end of the external bus bar serves as an external connection terminal of the battery cutoff unit 1 . That is, the other end of the external bus bar is exposed outside the housing 70 .
  • the busbar 31 connected to the relay 10 and the busbar 32 connected to the fuse 20 may be either an internal busbar or an external busbar.
  • bus bar 30 is a wiring member through which current flows, it is made of a conductive material.
  • the busbar 30 is a metallic rigid body made of a metallic material such as copper or aluminum.
  • bus bar 30 is made of copper.
  • bus bar 30 is formed of a plate-shaped metal plate made of pure copper or a copper alloy and having a constant thickness. The bus bar 30 is formed into a predetermined three-dimensional shape by bending a flat metal plate punched into a predetermined shape by press working or the like.
  • each busbar 30 is fixed to other members by screws such as bolts or screws, a part of each busbar 30 is provided with an insertion hole as a screw hole through which a screw is inserted. This insertion hole is provided at the end of the bus bar 30, for example.
  • the heat sink 40 is a heat radiating member that radiates (dissipates) heat generated by a heat generating element such as a heat generating component. As shown in FIGS. 4 to 6, a plurality of heat sinks 40 are arranged in the battery cutoff unit 1 in this embodiment. Specifically, the heat sinks 40 include a heat sink 41 (first heat sink) that dissipates heat generated by the relay 10 and a heat sink 42 (second heat sink) that dissipates heat generated by the fuse 20. included.
  • a heat sink 41 that dissipates heat from the relay 10 is arranged near the relay 10 . Therefore, the heat generated by the relay 10 is conducted to the heat sink 41 and radiated.
  • the heat sink 41 is arranged above the relay 10 . Specifically, two heat sinks 41 are arranged above the case 12 of one relay 10 .
  • a heat sink 42 that dissipates heat generated by the fuse 20 is arranged near the fuse 20 . Therefore, the heat generated by the fuse 20 is conducted to the heat sink 42 and radiated.
  • the heat sink 42 is arranged on the side of the fuse 20 .
  • heat sinks 42 are arranged on both sides of the case 22 of one fuse 20 . That is, the fuse 20 is sandwiched between two heat sinks 42, and the fuse 20 and the two heat sinks 42 are arranged side by side.
  • the heat sink 40 is preferably made of a material with high thermal conductivity.
  • the heat sink 40 may be made of a metal material such as aluminum or copper, or may be made of a resin material with high thermal conductivity.
  • the heat sink 40 is a metal block made of aluminum.
  • the cooler 50 cools the inside of the battery cutoff unit 1 .
  • the cooler 50 is a water cooler that cools the inside of the battery cutoff unit 1 by water cooling. Cooler 50 cools heat sink 41 to which heat generated by relay 10 is conducted, and cools heat sink 42 to which heat generated by fuse 20 is conducted. As shown in FIGS. 5 and 6 , the relay 10 is arranged below the cooler 50 and the fuse 20 is arranged above the cooler 50 .
  • the cooler 50 which is a water cooler, has a channel 51 through which cooling water flows, for example.
  • the cooler 50 has a metal pipe as a flow path 51 through which cooling water flows.
  • copper, aluminum, stainless steel, or the like can be used as the metal material forming the flow path 51 .
  • channel 51 has two end openings 51 a on one side of channel 51 and one end opening 51 b on the other side of channel 51 .
  • the two end openings 51a join in the middle.
  • One of the two end openings 51a and one end opening 51b is a supply port (upstream opening) to which cooling water is supplied, and the other of the two end openings 51a and one end opening 51b is This is an outlet (downstream side opening) through which the cooling water is discharged.
  • the flow path 51 has two end openings 51a on one side of the flow path 51, the present invention is not limited to this.
  • the flow path 51 may be configured to have one end opening on one side and the other side of the flow path 51, or may have a plurality of end openings on one side and the other side of the flow path 51.
  • a configuration having an opening may be used.
  • the cooling water flowing through the flow path 51 may be circulated by connecting the end opening 51a and the end opening 51b with an external flow path (pipe).
  • a heat exchanger is provided in an external flow path that connects the end openings 51a and 51b.
  • Insulating sheets 61 and 62 are arranged in the cooler 50 . As shown in FIGS. 5 and 6, the insulating sheet 61 (first insulating sheet) is arranged below the cooler 50 (relay 10 side), and the insulating sheet 62 (second insulating sheet) It is arranged on the upper side of the container 50 (on the fuse 20 side). That is, the cooler 50 is sandwiched between the insulating sheets 61 and 62 . In the present embodiment, insulating sheet 61 is in close contact with the lower surface of channel 51 of cooler 50 , and insulating sheet 62 is in close contact with the upper surface of channel 51 of cooler 50 .
  • the lower insulating sheet 61 is provided over the entire cooler 50 . Therefore, the insulating sheet 61 is arranged across the plurality of relays 10 . Moreover, the insulating sheet 61 is arranged so as to extend over the plurality of heat sinks 41 and is positioned between the cooler 50 and the plurality of heat sinks 41 .
  • the insulating sheet 61 may be divided into a plurality of pieces, or may be partially or wholly laminated.
  • the upper insulating sheet 62 is arranged to face the fuse 20 .
  • the insulating sheet 62 is arranged so as to extend over the plurality of heat sinks 42 arranged side by side with the fuses 20, and is arranged between the cooler 50 and the fuses 20 and the heat sinks 42. .
  • the insulating sheet 62 may be divided into a plurality of pieces, or may be partially or wholly laminated.
  • Each of the insulating sheets 61 and 62 is a sheet-shaped thin insulating member made of an insulating material.
  • the insulating sheets 61 and 62 before attachment have a uniform thickness.
  • the insulating sheets 61 and 62 have at least a basic insulating function.
  • the insulating sheets 61 and 62 have a reinforced insulating function in which the insulating sheets 61 and 62 alone have an insulating function.
  • the insulating sheets 61 and 62 are made of, for example, an insulating resin material.
  • each of the insulating sheets 61 and 62 preferably has a size adjustment function by compression.
  • an elastic sheet that can be elastically deformed is preferably used as the insulating sheets 61 and 62.
  • the insulating sheets 61 and 62 which are elastic sheets, are made of silicone rubber or acrylic rubber and have rubber elasticity.
  • the insulating sheets 61 and 62 preferably have a heat transfer function.
  • the insulating sheets 61 and 62 are preferably made of a material with high thermal conductivity. In this case, it is preferable to use heat conductive sheets (thermal sheets) as the insulating sheets 61 and 62 .
  • the insulating sheets 61 and 62 have a reinforced insulating function and a heat transfer function, and also have a size adjusting function by compression.
  • thermally conductive sheets made of elastomer and having insulating properties can be used as the insulating sheets 61 and 62.
  • the insulating sheets 61 and 62 may have a basic insulating function and a heat transfer function.
  • the housing 70 houses electronic components such as the relay 10 and the fuse 20.
  • the housing 70 also accommodates the busbar 30, the heat sink 40, the cooler 50, the insulating sheets 61 and 62, and the like.
  • the housing 70 is an outer shell member of the battery cutoff unit 1 . That is, the entire outer surface of the housing 70 is exposed to the outside air.
  • the housing 70 has an upper cover 71 (first cover) and a lower cover 72 (second cover).
  • the lower cover 72 is a box-shaped case.
  • a plurality of relays 10 are housed in the lower cover 72 .
  • Cooler 50 is arranged to cover the opening of lower cover 72 .
  • the fuse 20 arranged on the cooler 50 is covered with an upper cover 71 .
  • the housing 70 is a resin member made of an insulating resin material.
  • PPS polyphenylene sulfide
  • PBT polybutylene terephthalate
  • the upper cover 71 and the lower cover 72 are both made of glass fiber reinforced PBT.
  • the upper cover 71 and the lower cover 72 may be made of different resin materials instead of the same resin material.
  • FIG. 7 is an enlarged cross-sectional view of a region VII surrounded by broken lines in FIG.
  • FIG. 8 is an enlarged cross-sectional view of a region VIII surrounded by broken lines in FIG.
  • the terminals 11 of the relay 10, the busbar 31 and the heat sink 41 are fixed by screws 81. Specifically, the terminal 11 of the relay 10, the bus bar 31 and the heat sink 41 are fastened together by screws 81. As shown in FIG.
  • the screw 81 is an example of a fastening member, and a screw, a bolt, or the like can be used as the screw 81 .
  • the relay 10, the bus bar 31, and the heat sink 41 are electrically and thermally connected at the co-fastening portion 5a.
  • the terminals 11 of the relay 10, the busbar 31, and the heat sink 41 are fastened together by screws 81 in each of the pair of terminals 11 of the relay 10. As shown in FIG. Therefore, one relay 10 is provided with two co-fastening portions 5a. Also, each of the plurality of relays 10 is provided with two co-fastening portions 5a.
  • the busbar 31 is arranged between the terminal 11 of the relay 10 and the heat sink 41 in the common fastening portion 5a. That is, the terminal 11 of the relay 10 is connected to the heat sink 41 via the busbar 31 .
  • a bus bar 31 and a heat sink 41 are stacked on the terminals 11 of the relay 10 , and the bus bar 31 is sandwiched between the terminals 11 of the relay 10 and the heat sink 41 .
  • the terminal 11 of the relay 10 is in contact with the lower surface of the busbar 31
  • the lower surface of the heat sink 41 is in contact with the upper surface of the busbar 31 .
  • the heat sink 41 is arranged at the connecting portion between the terminal 11 of the relay 10 and the bus bar 31 .
  • the heat capacity near the terminal 11 of the relay 10 can be improved. Therefore, the heat in the terminal 11 of the relay 10 can be conducted to the heat sink 41 to efficiently dissipate the heat.
  • the cooler 50 is arranged near the co-tightening portion 5 a where the terminals 11 of the relay 10 , the bus bar 31 and the heat sink 41 are all-tightened together by screws 81 .
  • a cooler 50 is arranged on the common fastening portion 5a.
  • the heat sink 41 is cooled by the cooler 50 . Therefore, the heat of relay 10 conducted to heat sink 41 is cooled by cooler 50 .
  • the heat sink 41 and the cooler 50 construct a cooling structure having excellent cooling performance. As a result, the cooling performance against the heat generated by the relay 10 can be enhanced, so that the temperature rise of the relay 10 can be effectively suppressed. In particular, it is possible to effectively suppress the temperature rise of the relay 10 against short-time heat generation and large current of the battery 2 in an electric vehicle. Further, by enhancing the cooling performance with the heat sink 41 and the cooler 50, the bus bar 31 can be thinned or shortened. Thereby, cost reduction can also be achieved.
  • the heat sink 41 is added, but the terminals 11 of the relay 10, the bus bar 31, and the heat sink 41 are fastened together with screws 81. Thereby, when connecting and fixing the terminal 11 of the relay 10 and the bus bar 31, the heat sink 41 can also be fixed at the same time. In other words, the addition of the heat sink 41 does not require additional work. Therefore, it is possible to effectively suppress the temperature rise of the relay 10 without lowering workability.
  • an insulating sheet 61 is provided between the cooler 50 and the co-tightening portion 5a in which the terminal 11 of the relay 10, the bus bar 31, and the heat sink 41 are all fastened with screws 81. are placed. Specifically, the insulating sheet 61 is sandwiched between the heat sink 41 and the cooler 50 . That is, the insulating sheet 61 is arranged on the heat radiation surface of the heat sink 41 (the surface on the cooler 50 side).
  • the terminals 11 of the relay 10 and the cooler 50 having the metal flow path 51 (pipe) are electrically connected. can be prevented. That is, the terminal 11 of the relay 10 and the cooler 50 can be electrically separated by the insulating sheet 61 to be in an insulated state. In particular, even in an electric vehicle equipped with a high-voltage battery, sufficient insulation can be ensured.
  • the insulating member is arranged between the heat sink 41 and the cooler 50, the heat sink 41 and the cooler 50 are separated by the thickness of the insulating member, so the cooling effect of the heat sink 41 by the cooler 50 is improved. may decrease. That is, there is a possibility that the heat transfer to the cooler 50 of the heat generated by the relay 10 is inhibited. Moreover, when the thickness of the insulating member increases, the size of the battery cutoff unit 1 increases. As described above, when the heat sink 41 is added, it is difficult to achieve both the heat dissipation property of the heat generated by the relay 10 and the insulation property of the battery cutoff unit 1, and the battery cutoff unit 1 may increase in size. .
  • the insulation between the terminal 11 of the relay 10 and the cooler 50 is ensured by the sheet-like insulating sheet 61 .
  • the insulating state between the terminal 11 of the relay 10 and the cooler 50 is ensured without increasing the size of the battery cutoff unit 1 and without hindering the heat transfer of the heat generated in the relay 10 to the cooler 50. be able to.
  • the size of the battery cutoff unit 1 can be reduced while achieving both the heat radiation property of the heat generated in the relay 10 and the insulation property around the relay 10. can be planned. Furthermore, according to the battery cutoff unit 1 according to the present embodiment, the heat generated by the relay 10 can be efficiently transferred to the cooler 50, so that the current of the battery 2 can be further increased.
  • the insulating sheet 61 arranged between the heat sink 41 near the relay 10 and the cooler 50 has a basic insulating function and a heat transfer function.
  • the insulating sheet 61 is a thermally conductive sheet having insulating properties.
  • the heat generated by the relay 10 can be efficiently transferred to the cooler 50 while ensuring the insulation between the relay 10 and the cooler 50 . If the insulation between relay 10 and cooler 50 is not sufficient with only the basic insulating function of insulating sheet 61 , the current flowing through relay 10 and bus bar 31 may be conducted to cooler 50 . In this case, the insulation state can be ensured by separately taking insulation measures in the external device or the like to which the cooler 50 is connected.
  • the insulating sheet 61 arranged between the cooler 50 and the heat sink 41 has a reinforced insulating function and a heat transfer function, and is sized by compression. have a function.
  • the insulating sheet 61 is an elastic sheet having insulating properties, and is compressed by sandwiching the insulating sheet 61 between the heat sink 41 and the cooler 50 .
  • the insulating sheet 61 can absorb the dimensional tolerance of the cooler 50 and the like because the insulating sheet 61 has a size adjusting function by compression. Thereby, it is possible to suppress the formation of a gap serving as a heat insulating portion between the heat sink 41 and the cooler 50 . Therefore, the heat of terminal 11 of relay 10 can be efficiently conducted to cooler 50 .
  • the heat sink 41 near the relay 10 has a concave portion 41a in which the screw head of the screw 81 is accommodated.
  • the recess 41a is a counterbore.
  • the screw head of the screw 81 can be accommodated in the recess 41a, so that the screw head of the screw 81 can be prevented from protruding toward the cooler 50 side.
  • the heat sink 41 and the cooler 50 can be brought close to each other, so that the heat of the terminals 11 of the relay 10 can be efficiently conducted to the cooler 50 .
  • the battery cutoff unit 1 can be further miniaturized.
  • the thickness of the heat sink 41 near the relay 10 is 1 to 4 times the thickness of the bus bar 31 connected to the terminal 11 of the relay 10. Good.
  • the thickness of the heat sink 41 By setting the thickness of the heat sink 41 to be one or more times the thickness of the bus bar 31 in this manner, the heat capacity of the heat sink 41 against the heat of the terminals 11 of the relay 10 can be sufficiently secured. However, if the thickness of the heat sink 41 is too large, the distance between the terminals 11 of the relay 10 and the cooler 50 increases, and the heat radiation performance of the terminals 11 of the relay 10 may rather deteriorate. Therefore, it is preferable that the thickness of the heat sink 41 is four times or less the thickness of the bus bar 31 .
  • the heat sink 41 near the relay 10 is made of a heat capacity material having a heat capacity larger than that of the case 12 of the relay 10 .
  • the heat sink 41 is made of copper or aluminum.
  • the heat capacity of the heat sink 41 can be increased, so that the high heat capacity heat sink 41 cooled by the cooler 50 can store a large amount of heat energy.
  • the heat dissipation performance of the terminal 11 of the relay 10 can be further improved.
  • the heat sink 41 can efficiently absorb the heat generated by the relay 10 when the electric vehicle suddenly accelerates.
  • the heat energy stored in the heat sink 41 can be radiated to the cooler 50 via the insulating sheet 61 during traveling at a constant speed after acceleration and during deceleration when the vehicle is stopped.
  • the battery cutoff unit 1 according to the present embodiment has a heat storage and heat release structure, it can cope with charging and discharging due to rapid acceleration in an electric vehicle.
  • the heat sink 41 by forming the heat sink 41 from a high heat capacity material, even a small-sized heat sink 41 can easily ensure a high heat capacity. As a result, a compact battery cutoff unit 1 can be easily realized.
  • the relay 10 has an insulating plate 12a positioned between the pair of terminals 11 .
  • the total thickness of the thickness of the bus bar 31 connected to the terminal 11 of the relay 10 and the thickness of the heat sink 41 is greater than the height of the insulating plate 12a of the relay 10. It's getting bigger.
  • the terminals 21 of the fuse 20, the busbar 32 and the heat sink 42 are fixed by screws 82.
  • the terminal 21 of the fuse 20 , the bus bar 32 and the heat sink 42 are fastened together by screws 82 .
  • the screw 82 is an example of a fastening member, and as the screw 82 (second screw), a screw, a bolt, or the like can be used like the screw 81 (first screw).
  • the fuse 20, the bus bar 32, and the heat sink 42 are electrically and thermally connected to each other at the co-fastening portion 5b.
  • the terminal 21 of the fuse 20, the bus bar 32, and the heat sink 42 are fastened together by screws 82 in each of the pair of terminals 21 of the fuse 20. As shown in FIG. Therefore, one fuse 20 is provided with two co-fastening portions 5b.
  • the terminals 21 of the fuse 20 are positioned between the busbar 32 and the heat sink 42 .
  • the terminals 21 of the fuse 20 and the busbars 32 are stacked on the heatsink 42 , and the terminals 21 of the fuse 20 are sandwiched between the busbars 32 and the heatsink 42 .
  • the lower surface of the busbar 32 is in contact with the upper surface (busbar connection surface) that is one surface of the terminal 21 of the fuse 20, and the other surface (heat sink connection surface) of the terminal 21 of the fuse 20 is in contact with the lower surface of the busbar 32.
  • the upper surface of the heat sink 42 is in contact.
  • the heat sink 42 is held by a holder 90.
  • the holder 90 is fixed to a part of the cooler 50 by screws (not shown), for example.
  • the heat sink 42 is arranged at the connecting portion between the terminal 21 of the fuse 20 and the bus bar 32 .
  • the heat capacity near the terminal 21 of the fuse 20 can be improved. Therefore, the heat at the terminals 21 of the fuse 20 can be conducted to the heat sink 42 to efficiently dissipate the heat.
  • the cooler 50 is arranged near the co-tightening portion 5 b where the terminals 21 of the fuse 20 , the bus bar 32 and the heat sink 42 are all-tightened with screws 82 . Specifically, a cooler 50 is arranged below the jointly tightened portion 5b.
  • the heat sink 42 is cooled by the cooler 50 . Therefore, the heat of fuse 20 conducted to heat sink 42 is cooled by cooler 50 .
  • the heat sink 42 and the cooler 50 construct a cooling structure having excellent cooling performance. As a result, it is possible to improve the cooling performance against the heat generation of the terminals 21 of the fuse 20, so that the temperature rise of the terminals 21 of the fuse 20 can be effectively suppressed. In particular, it is possible to effectively suppress the temperature rise of the terminal 21 of the fuse 20 against short-time heat generation and large current of the battery 2 in an electric vehicle. Further, by enhancing the cooling performance with the heat sink 42 and the cooler 50, the bus bar 32 can be thinned or shortened. Thereby, cost reduction can also be achieved.
  • the heat sink 42 is added, but the terminals 21 of the fuse 20, the bus bar 32, and the heat sink 42 are fastened together with screws 82.
  • the heat sink 42 can be fixed at the same time.
  • the addition of the heat sink 42 does not require additional work. Therefore, it is possible to effectively suppress the temperature rise of the fuse 20 without lowering workability.
  • an insulating sheet 62 is provided between the cooler 50 and the co-tightening portion 5b where the terminal 21 of the fuse 20, the bus bar 32, and the heat sink 42 are all fastened together with screws 82. are placed. Specifically, the insulating sheet 62 is sandwiched between the heat sink 42 and the cooler 50 . That is, the insulating sheet 62 is arranged on the heat radiation surface of the heat sink 42 (the surface on the cooler 50 side).
  • the terminals 21 of the fuse 20 and the cooler 50 having the metal flow path 51 (pipe) are electrically connected. can be prevented. That is, the terminal 21 of the fuse 20 and the cooler 50 can be electrically separated by the insulating sheet 62 to be in an insulated state. In particular, even in an electric vehicle equipped with a high-voltage battery, sufficient insulation can be ensured.
  • the insulating member is arranged between the heat sink 42 and the cooler 50, the heat sink 42 and the cooler 50 are separated by the thickness of the insulating member, so the cooling effect of the heat sink 42 by the cooler 50 is improved. may decrease. In other words, there is a possibility that the heat transfer to the cooler 50 of the heat generated by the fuse 20 is inhibited. Moreover, when the thickness of the insulating member increases, the size of the battery cutoff unit 1 increases. Thus, when the heat sink 42 is added, it is difficult to achieve both the heat dissipation property of the heat generated by the fuse 20 and the insulation property of the battery cutoff unit 1, and the battery cutoff unit 1 may become large. .
  • the insulating state between the terminal 21 of the fuse 20 and the cooler 50 is ensured by the sheet-shaped insulating sheet 62 .
  • the insulating state between the terminal 21 of the fuse 20 and the cooler 50 is ensured without increasing the size of the battery cutoff unit 1 and without hindering the heat transfer of the heat generated by the fuse 20 to the cooler 50. be able to.
  • the size of the battery cutoff unit 1 can be reduced while achieving both the heat radiation property of the heat generated by the fuse 20 and the insulation property around the fuse 20. can be planned. Furthermore, according to the battery cutoff unit 1 according to the present embodiment, the heat generated by the fuse 20 due to the passage of a large current can be efficiently transmitted to the cooler 50, so that it is possible to cope with a further increase in the current of the battery 2.
  • the insulating sheet 62 arranged between the heat sink 42 near the fuse 20 and the cooler 50 has a basic insulating function and a heat transfer function.
  • the insulating sheet 62 is a thermally conductive sheet having insulating properties.
  • the heat generated by the fuse 20 can be efficiently transferred to the cooler 50 while ensuring the insulation between the fuse 20 and the cooler 50 . If the insulation between the fuse 20 and the cooler 50 is insufficient only with the basic insulating function of the insulating sheet 62 , the current flowing through the fuse 20 and the busbar 32 may be conducted to the cooler 50 . In this case, the insulation state can be ensured by separately taking insulation measures in the external device or the like to which the cooler 50 is connected.
  • the insulating sheet 62 arranged between the cooler 50 and the heat sink 42 has a reinforced insulating function and a heat transfer function, and is sized by compression. have a function.
  • the insulating sheet 62 is an elastic sheet having insulating properties, and is compressed by sandwiching the insulating sheet 62 between the heat sink 42 and the cooler 50 .
  • the insulation sheet 62 has a size adjustment function by compression, so that the insulation sheet 62 can absorb the dimensional tolerance of the cooler 50 and the like. Thereby, it is possible to suppress the formation of a gap serving as a heat insulating portion between the heat sink 42 and the cooler 50 . Therefore, the heat of the terminals 21 of the fuse 20 can be efficiently conducted to the cooler 50 .
  • the vibration resistance of the fuse 20 can be enhanced. In other words, the vibration load applied to the fuse 20 can be suppressed by the insulating sheet 62, and the durability of the fuse 20 can be improved.
  • the heat sink 42 near the fuse 20 has a recess 42a in which the screw head of the screw 82 is accommodated.
  • the recess 42a is a counterbore.
  • the screw head of the screw 82 can be accommodated in the recess 42a, so that the screw head of the screw 82 can be prevented from protruding toward the cooler 50 side.
  • the heat sink 42 and the cooler 50 can be brought closer to each other, so that the heat of the terminals 21 of the fuse 20 can be efficiently conducted to the cooler 50 .
  • the battery cutoff unit 1 can be further miniaturized.
  • the thickness of the heat sink 42 near the fuse 20 is 1 to 4 times the thickness of the bus bar 32 connected to the terminal 21 of the fuse 20. Good.
  • the thickness of the heat sink 42 By setting the thickness of the heat sink 42 to be one or more times the thickness of the bus bar 32 in this way, the heat capacity of the heat sink 42 against the heat of the terminals 21 of the fuse 20 can be sufficiently secured. However, if the thickness of the heat sink 42 is too large, the distance between the terminals 21 of the fuse 20 and the cooler 50 increases, and the heat radiation performance of the terminals 21 of the fuse 20 may rather deteriorate. Therefore, it is preferable that the thickness of the heat sink 42 is four times or less the thickness of the bus bar 32 .
  • the heat sink 42 near the fuse 20 is made of a high heat capacity material having a heat capacity larger than that of the case 22 of the fuse 20 .
  • the heat sink 42 is made of copper or aluminum.
  • the heat capacity of the heat sink 42 can be increased, so that the high heat capacity heat sink 42 cooled by the cooler 50 can store a large amount of heat energy. As a result, the heat dissipation performance of the terminals 21 of the fuse 20 can be further improved. Furthermore, by configuring the heat sink 42 with a high heat capacity material, a high heat capacity can be easily ensured even with a small size heat sink 42 . As a result, a compact battery cutoff unit 1 can be easily realized.
  • the thickness of the heat sink 42 near the fuse 20 is the same as the height from the case 22 of the fuse 20 to the terminal 21 of the fuse 20 . That is, there is no height difference between the lower surface of the heat sink 42 and the lower surface of the case 22 of the fuse 20 .
  • both the lower surface (heat radiation surface) of the heat sink 42 and the lower surface of the case 22 of the fuse 20 can be brought into contact with the insulating sheet 62 . Therefore, the lower surface of the heat sink 42 and the lower surface of the case 22 of the fuse 20 can be brought into close contact with the flow path 51 of the cooler 50 via the insulating sheet 62 . As a result, it is possible to increase the number of heat dissipation paths for the heat generated by the fuse 20, so that the heat dissipation performance of the heat generated by the fuse 20 can be improved.
  • the fuse 20 is a current fuse. Specifically, the fuse 20 is a blown fuse that blows when an overcurrent flows.
  • Fusing fuses are filled with fine sand called arc-extinguishing sand. Therefore, if the fuse is subjected to vibration or shock, arc-extinguishing sand sealed inside the fuse may leak to the outside, and the fusing function of the fuse may be lost. In particular, if the connection between the bus bar connected to the terminal of the blown fuse and the terminal of the blown fuse is unstable, the fuse may be subjected to vibration or impact, and further vibration or impact to the fuse may cause the fuse case to resonate. When the fuse is vibrated, the arc-extinguishing sand inside the fuse tends to leak out.
  • the vibration of the fuse 20 can be absorbed.
  • the vibration stress applied to the fuse 20 can be alleviated, so that leakage of the arc-extinguishing sand inside the fuse 20 can be suppressed. Therefore, according to the battery cutoff unit 1 according to the present embodiment, even when a blown fuse is used as the fuse 20, the dimensional tolerance of the fuse 20 is absorbed while the heat of the fuse 20 is radiated. can be suppressed. Therefore, a highly reliable battery cutoff unit 1 can be realized.
  • the battery cutoff unit 1 As described above, according to the battery cutoff unit 1 according to the present embodiment, it is possible to reduce the size of the battery cutoff unit 1 while achieving both heat dissipation and insulation.
  • such a battery cutoff unit 1 is suitable for electric vehicles.
  • the battery cut-off unit 1 is more suitable for pure electric vehicles than for hybrid electric vehicles, since the current is higher in pure electric vehicles.
  • the insulating sheet 62 there is no height difference between the lower surface of the heat sink 42 near the fuse 20 and the lower surface of the case 22 of the fuse 20, and both the lower surface of the heat sink 42 and the lower surface of the case 22 of the fuse 20 are covered by the insulating sheet 62. but not limited to this. In other words, there may be a height difference between the lower surface of the heat sink 42 and the lower surface of the case 22 of the fuse 20 .
  • the lower surface of the heat sink 42 may be located closer to the cooler 50 (insulating sheet 62 side) than the lower surface of the case 22 of the fuse 20, as in the battery cutoff unit 1A shown in FIG. As a result, the heat sink 42 can be brought closer to the cooler 50 , so that the heat transferred to the heat sink 42 can be efficiently cooled by the cooler 50 .
  • a gap G which is an air layer, exists between the lower surface of the case 22 of the fuse 20 and the insulating sheet 62, and the insulating sheet 62 does not contact the lower surface of the case 22 of the fuse 20. It is not limited to this. Specifically, the insulating sheet 62 may contact not only the bottom surface of the heat sink 42 but also the bottom surface of the case 22 of the fuse 20 . In this case, the insulating sheet 62 may not have a constant thickness, but may be an integral body having a partly thickened thickness so as to fill the height difference (step) between the heat sink 42 and the case 22 of the fuse 20.
  • it may be a laminate obtained by laminating a plurality of insulating sheets so as to partially increase the thickness.
  • the lower surface of the heat sink 42 and the lower surface of the case 22 of the fuse 20 can be covered with an insulating sheet without making a part of the cooler 50 uneven. It can be brought into close contact with cooler 50 via 62 .
  • the lower surface of the case 22 of the fuse 20 is higher than the lower surface of the heat sink 42, as in the battery cutoff unit 1B shown in FIG. It may be positioned on the cooler 50 side (insulating sheet 62 side).
  • the insulating sheet 62 is preferably in close contact with both the lower surface of the heat sink 42 and the lower surface of the case 22 of the fuse 20.
  • the insulating sheet 62 may not have a constant thickness, but may be an integral body with a part of the thickness thickened so as to fill the height difference (step) between the heat sink 42 and the case 22 of the fuse 20.
  • a laminate obtained by laminating a plurality of insulating sheets so as to partially increase the thickness may be used.
  • the lower surface of the heat sink 42 and the lower surface of the case 22 of the fuse 20 are insulated without making a part of the cooler 50 uneven. It can be brought into close contact with the cooler 50 via the sheet 62 .
  • the heat sink 42 near the fuse 20 is laminated only on the bus bar 32 connected to the terminal 21 of the fuse 20 among the plurality of bus bars 30, but the present invention is not limited to this.
  • the busbars 32 and 33 are connected to the heatsink 42 by screws 82 .
  • the heat sink 42 is provided with two concave portions 42 a (counterbore portions) corresponding to the two screws 82 .
  • the plurality of busbars 30 are separated, but the present invention is not limited to this.
  • the bus bars 31 connected to the relays 10 may be integrated by the insulating resin portion 34 .
  • the module structure 35 preferably has at least a pair of busbars 31 corresponding to each of the pair of terminals 11 of the relay 10 .
  • a plurality of busbars 30 (including all the busbars 31) positioned below the cooler 50 and the insulating resin portion 34 are integrally formed.
  • FIG. 12(a) is formed by integrating an insulating resin portion 34 shown in FIG. 12(b) and a plurality of busbars 30 shown in FIG. 12(c). structure.
  • FIG. 12(b) of FIG. 12 only the insulating resin portion 34 in the module structure 35 is illustrated.
  • Such a module structure 35 can be produced, for example, by insert molding. Specifically, the module structure 35 can be produced by integrally fixing the plurality of busbars 31 with the insulating resin portion 34 that is molded resin. For example, a module structure in which a plurality of busbars 31 are embedded in an insulating resin portion 34 (mold resin) and integrated by injecting a liquid resin material into an injection mold in which a plurality of busbars 31 are set and curing the material. 35 can be made.
  • FIG. 13 shows a cross section of a battery cutoff unit 1D incorporating the module structure 35 manufactured in this way.
  • a battery cutoff unit 1D shown in FIG. 13 has a structure in which a module structure 35 is incorporated in the battery cutoff unit 1 shown in FIG. Specifically, since the battery cutoff unit 1D shown in FIG. 13 and the battery cutoff unit 1 shown in FIG. It has a structure in which an insulating resin portion 34 is added to the battery cutoff unit 1 shown.
  • the module structure 35 has a positioning portion 35a formed so that the insulating plate 12a of the relay 10 is positioned between the pair of busbars 31 corresponding to the pair of terminals 11 of the relay 10. there is Further, the positioning portion 35 a is positioned between a pair of heat sinks 41 connected to the pair of bus bars 31 .
  • the module structure 35 may integrate not only the plurality of busbars 31 but also the plurality of heat sinks 41 . That is, not only the plurality of busbars 31 but also the plurality of heat sinks 41 may be fixed to the insulating resin portion 34 of the module structure 35 .
  • a water cooler is used as the cooler 50 in the above embodiment, it is not limited to this.
  • a cooler 50 other than a water cooler may be used.
  • the battery cutoff unit 1 is used for an electric vehicle, but it is not limited to this.
  • the battery cutoff unit 1 can also be applied to electrical products such as home appliances.
  • the technology of the present disclosure can be widely used in various products such as automobiles and electrical products.

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  • Microelectronics & Electronic Packaging (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Protection Of Static Devices (AREA)
  • Fuses (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Inverter Devices (AREA)
PCT/JP2023/005702 2022-02-24 2023-02-17 バッテリー遮断ユニット Ceased WO2023162881A1 (ja)

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US18/836,806 US20250167338A1 (en) 2022-02-24 2023-02-17 Battery disconnect unit
JP2024069215A JP2024100766A (ja) 2022-02-24 2024-04-22 バッテリー遮断ユニット

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WO2025132752A1 (en) * 2023-12-22 2025-06-26 Designwerk Technologies Ag High voltage power distribution device
WO2025215966A1 (ja) * 2024-04-08 2025-10-16 矢崎総業株式会社 電気接続ユニットおよび金属部品

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JP2019040808A (ja) * 2017-08-28 2019-03-14 カルソニックカンセイ株式会社 組電池
JP2020127302A (ja) * 2019-02-05 2020-08-20 パナソニックＩｐマネジメント株式会社 電気接続箱
JP2020194872A (ja) * 2019-05-28 2020-12-03 株式会社オートネットワーク技術研究所 回路構成体
JP2021052189A (ja) * 2019-07-15 2021-04-01 株式会社オートネットワーク技術研究所 回路構成体
WO2021059767A1 (ja) * 2019-09-26 2021-04-01 株式会社オートネットワーク技術研究所 電気接続箱
JP2021180233A (ja) * 2020-05-13 2021-11-18 株式会社オートネットワーク技術研究所 回路ユニット

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JP2019040808A (ja) * 2017-08-28 2019-03-14 カルソニックカンセイ株式会社 組電池
JP2020127302A (ja) * 2019-02-05 2020-08-20 パナソニックＩｐマネジメント株式会社 電気接続箱
JP2020194872A (ja) * 2019-05-28 2020-12-03 株式会社オートネットワーク技術研究所 回路構成体
JP2021052189A (ja) * 2019-07-15 2021-04-01 株式会社オートネットワーク技術研究所 回路構成体
WO2021059767A1 (ja) * 2019-09-26 2021-04-01 株式会社オートネットワーク技術研究所 電気接続箱
JP2021180233A (ja) * 2020-05-13 2021-11-18 株式会社オートネットワーク技術研究所 回路ユニット

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025132752A1 (en) * 2023-12-22 2025-06-26 Designwerk Technologies Ag High voltage power distribution device
WO2025215966A1 (ja) * 2024-04-08 2025-10-16 矢崎総業株式会社 電気接続ユニットおよび金属部品

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US20250167338A1 (en) 2025-05-22
JP2024100766A (ja) 2024-07-26

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