WO2021199488A1 - 電源装置及びこれを備える車両並びに蓄電装置 - Google Patents
電源装置及びこれを備える車両並びに蓄電装置 Download PDFInfo
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- WO2021199488A1 WO2021199488A1 PCT/JP2020/043106 JP2020043106W WO2021199488A1 WO 2021199488 A1 WO2021199488 A1 WO 2021199488A1 JP 2020043106 W JP2020043106 W JP 2020043106W WO 2021199488 A1 WO2021199488 A1 WO 2021199488A1
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- Prior art keywords
- power supply
- supply device
- bus bar
- electrode terminal
- electrode terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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- H—ELECTRICITY
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- 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
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/522—Inorganic material
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present disclosure relates to a power supply device, a vehicle equipped with the power supply device, and a power storage device.
- Power supply devices such as battery modules and battery packs having a plurality of battery cells are used as power supplies for vehicles such as hybrid vehicles and electric vehicles, and power supply for power storage systems for factories and households (for example, patent documents). See 1-3).
- a plurality of rechargeable and dischargeable battery cells are stacked.
- end plates 903 are arranged on both end faces of the battery laminate 910 in which the battery cells 901 of the square outer can are laminated, and the end plates 903 are placed on each other. Is fastened with a bind bar 904.
- the square battery cell 901 is provided with positive and negative electrode terminals 902 separated from each other on the upper surface thereof.
- the electrode terminals 902 of the adjacent battery cells 901 are connected by a bus bar 940 as shown in the enlarged exploded perspective view of FIG.
- One of the objects according to one aspect of the present invention is to provide a power supply device having improved reliability of connection between an electrode terminal of a battery cell and a bus bar, a vehicle equipped with the power supply device, and a power storage device.
- a power supply device comprises a battery laminate in which a plurality of battery cells having electrode terminals are laminated on the upper surface of an outer can, and a plurality of bus bars connecting the electrode terminals of adjacent battery cells.
- the bus bar has a window portion in which a part of the electrode terminals can be visually recognized in a state of being overlapped with the electrode terminals of the battery cell in a plan view.
- the lower electrode terminals can be visually recognized through the window portion, so that the connection position and height can be confirmed, and the connection can be confirmed. It is possible to increase the reliability.
- FIG. 1 It is a perspective view with an enlarged view of the main part which shows the power supply device which concerns on Embodiment 1 of this invention. It is an exploded perspective view with an enlarged view of the main part of the power supply device shown in FIG. It is a schematic cross-sectional view which shows the battery cell of the power supply device which concerns on a modification. It is a schematic plan view which shows the connection piece of a bus bar. It is a schematic cross-sectional view in the VV line of FIG. It is a schematic plan view which shows the connection piece of the bus bar of the power supply device which concerns on Embodiment 2. FIG. It is a schematic plan view which shows the connection piece of the bus bar of the power supply device which concerns on Embodiment 3. FIG.
- FIG. It is a schematic plan view which shows the connection piece of the bus bar of the power supply device which concerns on Embodiment 4.
- FIG. It is a schematic plan view which shows the connection piece of the bus bar of the power supply device which concerns on Embodiment 5.
- Embodiment 8 It is a block diagram which shows an example which mounts a power supply device in a hybrid vehicle which runs by an engine and a motor.
- the embodiment of the present invention may be specified by the following configuration.
- the bus bar has a plurality of windows so that the electrode terminals can be visually recognized from each window.
- different positions of the electrode terminals can be confirmed through multiple windows. Therefore, the heights of different parts of the electrode terminals are measured, and the gap between the back surface of the bus bar and the electrode terminals is calculated from the known thickness of the bus bar. It becomes possible to do.
- the bus bar separates the plurality of windows so as to sandwich a fixed region to which the bus bar and the electrode terminal are connected. Let's open it.
- the height of the electrode terminals can be measured at two points facing each other across the fixed region, so that the gap between the electrode terminals and the bus bar in the fixed region can be calculated more accurately.
- the plurality of windows are opened at diagonal positions of the electrode terminals.
- the height of the electrode terminals can be measured at two diagonal points, so that the gap between the electrode terminals and the bus bar can be calculated more accurately.
- the window portion has an outer shape window portion for detecting the outer shape of the electrode terminal and the height of the electrode terminal. Includes a height window for detecting electrodes.
- the window portion is opened in the bus bar in a rectangular shape.
- the window portion is opened in an elongated hole shape longer than the width of the electrode terminal.
- the window portion is formed to be smaller than the electrode terminal.
- connection portion between the bus bar and the electrode terminal is a laser welded portion.
- the electrode terminals form recesses. With the above configuration, it is possible to perform joining without using the engagement between the conventional electrode terminal having a convex portion and the round hole of the bus bar.
- the bus bar is larger than the electrode terminal in a state of being overlapped with the electrode terminal of the battery cell in a plan view. It is formed.
- the electric vehicle includes any of the above power supply devices, a traveling motor to which power is supplied from the power supply device, the power supply device, and the motor. It includes a main body and wheels driven by the motor to drive the vehicle main body.
- the power storage device includes any of the above power supply devices and a power supply controller that controls charging / discharging to the power supply device, and the power supply controller is used to generate electric power from the outside. Allows the battery cell to be charged and controls the battery cell to be charged.
- the method for manufacturing a power supply device is a battery laminate in which a plurality of battery cells having electrode terminals are stacked, and a bus bar for connecting the electrode terminals of adjacent battery cells.
- the lower electrode terminals can be visually recognized through the window portion, so that the welding position and height can be confirmed, and the reliability of welding can be improved.
- the step of confirming the positioning is such that the bus bar is overlapped with the electrode terminal of the battery cell, and the window portion.
- a gap between the back surface of the bus bar and the front surface of the electrode terminal based on the step of visually recognizing a part of the electrode terminal through the process and measuring the height of the electrode terminal and the known thickness of the bus bar. Includes the process of calculating.
- a step of welding the bus bar to the battery cell is performed by laser welding.
- each element constituting the present invention may be configured such that a plurality of elements are composed of the same member and the plurality of elements are combined with one member, or conversely, the function of one member is performed by the plurality of members. It can also be shared and realized.
- the contents described in some examples and embodiments can be used in other embodiments and embodiments.
- the power supply device is a power source mounted on an electric vehicle such as a hybrid vehicle or an electric vehicle to supply electric power to a traveling motor, a power source for storing electric power generated by natural energy such as solar power generation or wind power generation, or a power source for storing electric power generated by natural energy such as solar power generation and wind power generation. It is used for various purposes such as a power source for storing midnight power, and is particularly suitable as a power source suitable for high power and large current applications.
- a power source for storing midnight power and is particularly suitable as a power source suitable for high power and large current applications.
- FIGS. 1 and 2 show a perspective view with an enlarged view of a main part of the power supply device 100 according to the first embodiment
- FIG. 2 shows an exploded perspective view with an enlarged view of a main part of the power supply device 100 shown in FIG. ..
- the power supply device 100 shown in these figures includes a battery laminate 10 in which a plurality of battery cells 1 are laminated via an insulating spacer 16, a pair of end plates 20 covering both end faces of the battery laminate 10, and an end plate 20. It includes a plurality of fastening members 15 for fastening each other, and a bus bar 40 provided on the upper surface of the battery laminate 10.
- the fastening member 15 is formed in a plate shape extending along the stacking direction of the plurality of battery cells 1.
- the fastening members 15 are arranged on opposite side surfaces of the battery laminate 10 to fasten the end plates 20 to each other. (Battery laminate 10)
- the battery laminate 10 is connected to a plurality of battery cells 1 having positive and negative electrode terminals 2 and electrode terminals 2 of the plurality of battery cells 1, and the plurality of battery cells 1 are arranged in parallel.
- a bus bar 40 connected in series is provided.
- a plurality of battery cells 1 are connected in parallel or in series via these bus bars 40.
- the battery cell 1 is a rechargeable secondary battery.
- a plurality of battery cells 1 are connected in parallel to form a parallel battery group, and a plurality of parallel battery groups are connected in series to connect a large number of battery cells 1 in parallel and in series.
- a plurality of battery cells 1 are laminated to form a battery laminate 10.
- a pair of end plates 20 are arranged on both end faces of the battery laminate 10. The ends of the fastening members 15 are fixed to the end plates 20, and the stacked battery cells 1 are fixed in a pressed state.
- the battery cell 1 is a square battery having a width wider than the thickness, in other words, a square battery thinner than the width, and is laminated in the thickness direction to form a battery laminate 10.
- the battery cell 1 can be, for example, a lithium ion secondary battery. Further, the battery cell can be any rechargeable secondary battery such as a nickel hydrogen battery or a nickel cadmium battery.
- positive and negative electrode plates are housed together with an electrolytic solution in an outer can 1a having a closed structure.
- a metal plate such as aluminum or an aluminum alloy is press-molded into a square shape, and the opening portion is airtightly sealed with a sealing plate 1b.
- the sealing plate 1b is made of the same aluminum or aluminum alloy as the square outer can 1a, and positive and negative electrode terminals 2 are fixed to both ends. Further, the sealing plate 1b is provided with a gas discharge valve 1c, which is a safety valve that opens according to a pressure change inside each of the battery cells 1, between the positive and negative electrode terminals 2.
- the plurality of battery cells 1 are laminated so that the thickness direction of each battery cell 1 is the stacking direction to form the battery laminate 10. At this time, the output of the battery laminate 10 can be increased by increasing the number of layers to be larger than usual. In such a case, the battery laminate 10 becomes a long one extended in the stacking direction.
- terminal surfaces 1X provided with positive and negative electrode terminals 2 are arranged on the same plane, and a plurality of battery cells 1 are laminated to form a battery laminate 10.
- the upper surface of the battery laminate 10 is a surface provided with gas discharge valves 1c of a plurality of battery cells 1. (Electrode terminal 2)
- the battery cell 1 has a sealing plate 1b, which is the top surface, as a terminal surface 1X, and positive and negative electrode terminals 2 are fixed to both ends of the terminal surface 1X.
- the electrode terminal 2 has a chamfered rectangular plate shape.
- the shape of the electrode terminal is not limited to this, and may be a polygonal shape such as an octagon, a circular or elliptical plate shape. It is not always essential to chamfer the corners of the plate-shaped electrode terminals.
- a recess 2a may be formed in the center of the plate shape.
- the positions of the positive and negative electrode terminals 2 fixed to the sealing plate 1b of the battery cell 1 are such that the positive electrode and the negative electrode are symmetrical.
- the battery cells 1 are flipped horizontally and stacked, and the electrode terminals 2 of the positive electrode and the negative electrode that are adjacent to each other are connected by the bus bar 40, whereby the adjacent battery cells 1 are connected in series. It is possible to connect to.
- the present invention does not specify the number of battery cells constituting the battery laminate and the connection state thereof.
- the number of battery cells constituting the battery laminate and the connection state thereof can be variously changed, including other embodiments described later.
- the plurality of battery cells 1 are laminated so that the thickness direction of each battery cell 1 is the stacking direction to form the battery laminate 10.
- a plurality of battery cells 1 are laminated so that the terminal surface 1X provided with the positive and negative electrode terminals 2 and the sealing plate 1b in FIG. 2 are flush with each other. (Insulation spacer 16)
- the battery laminate 10 has an insulating spacer 16 interposed between the battery cells 1 stacked adjacent to each other.
- the insulating spacer 16 is made of an insulating material such as resin in the form of a thin plate or sheet.
- the insulating spacer 16 has a plate shape having a size substantially equal to that of the facing surface of the battery cell 1.
- the insulating spacers 16 can be laminated between the battery cells 1 adjacent to each other to insulate the adjacent battery cells 1 from each other.
- a spacer having a shape in which a flow path of a cooling gas is formed between the battery cells and the spacer can also be used.
- the surface of the battery cell can be covered with an insulating material.
- the surface of the outer excluding the electrode terminal portion of the battery cell may be covered with a shrink film such as PET resin.
- end plates 20 are arranged on both end surfaces of the battery laminate 10.
- An end face spacer 17 may be interposed between the end plate 20 and the battery laminate 10 to insulate them.
- the end face spacer 17 can also be manufactured in the form of a thin plate or sheet with an insulating material such as resin.
- Electrode terminals 2 of a plurality of battery cells 1 adjacent to each other are connected to each other by a bus bar 40 to form a plurality of batteries.
- the cells 1 are connected in parallel and in series.
- the end plates 20 are arranged at both ends of the battery laminate 10 and are fastened via a pair of left and right fastening members 15 arranged along both side surfaces of the battery laminate 10.
- the end plates 20 are both ends of the battery laminate 10 in the stacking direction of the battery cells 1, and are arranged outside the end face spacer 17 to sandwich the battery laminate 10 from both ends. (Fastening member 15)
- each fastening member 15 is made of metal having a predetermined width and a predetermined thickness along the side surface of the battery laminate 10, and is arranged so as to face both side surfaces of the battery laminate 10. There is.
- a metal plate such as iron, preferably a steel plate, can be used for the fastening member 15.
- the fastening member 15 made of a metal plate is bent by press molding or the like to form a predetermined shape.
- the fastening member 15 is formed by bending the upper and lower sides of the plate-shaped fastening main surface 15a in a U-shape to form a bent piece 15d.
- the upper and lower bent pieces 15d cover the upper and lower surfaces of the battery laminate 10 from the corners on the left and right side surfaces of the battery laminate 10.
- the fastening member 15 is fixed to the outer peripheral surface of the end plate 20 by screwing bolts 15f into a plurality of fastening screw holes opened in the fastening main surface 15a.
- the fixing of the fastening main surface 15a and the end plate 20 is not necessarily limited to screwing using bolts, and may be a pin, a rivet, or the like.
- a plurality of battery cells 1 are connected by connecting end plates 20 arranged at both ends of a battery laminate 10 composed of the plurality of battery cells 1 with fastening members 15. Is configured to constrain. By restraining the plurality of battery cells 1 via the end plate 20 and the fastening member 15 having high rigidity, it is possible to suppress expansion, deformation, relative movement, malfunction due to vibration, etc. of the battery cells 1 due to charge / discharge and deterioration. .. (Insulation sheet 30)
- an insulating sheet 30 is interposed between the fastening member 15 and the battery laminate 10.
- the insulating sheet 30 is made of an insulating material such as resin, and insulates between the metal fastening member 15 and the battery cell 1.
- the insulating sheet 30 shown in FIG. 2 and the like is composed of a flat plate 31 that covers the side surface of the battery laminate 10 and bent covering portions 32 provided above and below the flat plate 31.
- the bent covering portion 32 is bent in a U shape from the flat plate 31 so as to cover the bent piece 15d of the fastening member 15, and then further folded back.
- the bent piece 15d can be covered with an insulating bent covering portion from the upper surface to the side surface and the lower surface, thereby avoiding unintended conduction between the battery cell 1 and the fastening member 15.
- each battery cell 1 presses the upper surface and the lower surface of the battery cell 1 of the battery laminate 10 via the bent covering portion 32.
- each battery cell 1 is pressed from the vertical direction by the bent piece 15d and held in the height direction, and even if vibration, impact, or the like is applied to the battery laminate 10, each battery cell 1 is positioned in the vertical direction. It can be maintained so that it does not shift.
- the battery cell When the surface of the battery laminate or the battery laminate is insulated, for example, the battery cell is housed in an insulating case, covered with a heat-shrinkable resin film, or the fastening member. If the surface is coated with an insulating paint or coating, or if the fastening member is made of an insulating material, the insulating sheet can be unnecessary. Further, the insulating sheet 30 may also have the bent covering portion 32 formed only on the upper end side when it is not necessary to consider the insulation of the fastening member 15 with the bent piece 15d on the lower surface side of the battery laminate 10. For example, the case where the battery cell is covered with a heat-shrinkable film is applicable. (Busbar 40)
- the bus bar 40 is connected to both positive and negative electrode terminals 2 and the battery cells 1 are connected in series or in parallel.
- the battery cells 1 can be connected in series to increase the output voltage, and the battery cells 1 can be connected in parallel to increase the output voltage and output current.
- welding can be used.
- Laser beam scanning can be used for welding.
- an inexpensive and high-power fiber laser can be preferably used.
- resistance welding may be used instead of laser welding.
- the laser beam is scanned several times to partially melt and fix the bus bar 40 and the electrode terminal 2.
- the region where the bus bar 40 and the electrode terminal 2 are fixed is referred to as a fixed region FA in the present specification.
- the fixed region FA is scanned with a laser beam to fix the bus bar 40 and the electrode terminal 2.
- the bus bar 40 shown in FIGS. 1 and 2 connects the opposing electrode terminals 2 of two adjacent battery cells 1 to each other. Therefore, the bus bar 40 is extended so as to straddle the electrode terminals 2 of the adjacent battery cells 1 and cover each electrode terminal 2.
- each bus bar 40 has two connection pieces 41 connecting the electrode terminals 2 connected to each other, and each connection piece 41 is connected to the electrode terminals 2 of different battery cells 1 to electrically connect these battery cells 1 to each other. Connect to the target. That is, the two electrode terminals 2 are arranged so as to be covered with one bus bar 40 from the upper surface.
- connection piece 41 is formed by connecting two connection pieces 41 to form one bus bar 40, but the number of connection pieces is not limited to two, and the battery cell connection is not limited to two. Depending on the number and the connection form, three or more connection pieces may be connected to form a bus bar. (Window 42)
- each connection piece 41 of the bus bar 40 has a window portion 42 opened as shown in the plan view of FIG.
- a part of the electrode terminal 2 becomes visible in a state where the bus bar 40 is overlapped with the electrode terminal 2 of the battery cell 1.
- the lower electrode terminal 2 can be visually recognized through the window portion 42, and the welding position and height can be confirmed. It is possible to improve the reliability of laser welding.
- the bus bar and the electrode terminal are welded, if the bus bar is overlapped on the upper surface of the electrode terminal, the electrode terminal is hidden by the bus bar and the position of the electrode terminal cannot be visually recognized. For example, even if the position of the electrode terminal hidden in the bus bar deviates from the expected position, it cannot be confirmed from the bus bar side, so it is considered that laser welding is not performed properly and the predetermined welding strength cannot be exhibited. ..
- the bus bar 40 is provided with a window portion 42 so that a part of the electrode terminals 2 can be visually recognized, thereby improving the estimation accuracy of the welding position.
- the window portion 42 in advance at a position where the outer shape of the electrode terminal 2 assumed as the welding position is accommodated, it is possible to confirm that the electrode terminal 2 is correctly arranged.
- the conventional power supply device As another viewpoint, in the conventional power supply device, as shown in the exploded perspective view of FIG. 16 and the enlarged perspective view of FIG. 17, it is convex to the central portion of the electrode terminal 902 formed on the upper surface of the outer can of the battery cell 901. A portion was formed, and a round hole for inserting the convex portion was formed in one of the bus bars 940, and the convex portion was inserted into the round hole and laser welded.
- this configuration when welding the bus bar 940 and the electrode terminal 902, positioning can be performed with a convex portion and a round hole, and the welding position can also be visually recognized.
- the welding strength cannot be increased in proportion to the area because the contact area is small when welding with the bus bar 940 and the area that can be welded is limited.
- the central portion of the electrode terminal of the battery cell is made a flat surface without forming a convex portion having a locally narrowed area, and one bus bar is also made a flat surface, and these contact areas are increased to increase the welding area. It is conceivable to earn.
- this configuration since there is no round hole for inserting the convex portion on the bus bar side, a new problem has arisen in which the outer shape of the electrode terminal cannot be visually recognized.
- the electrode terminal is smaller than the connecting piece of the bus bar, the welding position is hidden by the bus bar, and it is not possible to confirm whether the electrode terminal and the bus bar are in the accurately positioned state. If laser welding is performed in this state, the joint strength of the electrode terminals and the bus bar that are not correctly positioned is not guaranteed, and the reliability may decrease.
- the position of the electrode terminal 2 can be confirmed by opening the positioning window 42 in the bus bar 40, not for engaging with the electrode terminal, so that the electrode terminal 2 can be confirmed. It is possible to confirm that the relative positioning between the bus bar 40 and the bus bar 40 is correct.
- the window portion 42 of the electrode terminal 2 is assumed to be in a predetermined position assumed as a fixed position in a state where the bus bar 40 is overlapped with the fixed position to be joined to the electrode terminal 2. It is pre-opened at a position where a part of the outer shape can be visually recognized. By opening the window portion 42 at such a position, it becomes possible to confirm through the window portion 42 that the electrode terminals 2 are correctly arranged at the assumed positions on the back side of the bus bar 40.
- the window portion 42 can be formed smaller than the electrode terminal 2. That is, it is not necessary to have a large shape for engaging with the electrode terminal 902 as shown in FIG. 17, and it is sufficient if a part of the outer shape or the height can be detected. By making the window portion 42 a small through hole in this way, the strength of the bus bar 40 can be maintained. In other words, according to the present embodiment, it is possible to eliminate the need for a large hole for inserting the convex portion of the electrode terminal 2 as in the conventional case.
- the bus bar 40 is formed larger than the electrode terminal 2 in a plan view in a state of being overlapped with the electrode terminal 2 of the battery cell 1.
- the bus bar 40 is larger than the electrode terminal 2 and the electrode terminal 2 is inevitably hidden by the bus bar 40, the lower electrode terminal 2 can be visually recognized through the window portion 42 as described above.
- the welding position and height can be confirmed, and the reliability of laser welding can be improved.
- the above is not essential in the present invention, and is applied to, for example, even when the bus bar 40 is smaller than the electrode terminal 2, the posture of the welded portion hidden in the bus bar 40 cannot be confirmed depending on the shape of the electrode terminal 2. can.
- the height detection position for detecting the surface height of the electrode terminal 2 is indicated by HA.
- a schematic cross-sectional view taken along the line VV of FIG. 4 is shown in FIG. Since the height of the front surface of the bus bar 40 can be detected at a portion other than the window portion 42, the height of the back surface side of the bus bar 40 can also be obtained by subtracting the known thickness of the bus bar 40 from the height of the surface of the bus bar 40. Can be calculated.
- the gap GP between the electrode terminal 2 and the bus bar 40 can be calculated from the height of the electrode terminal 2 and the height on the back surface side of the bus bar 40.
- the height of the surface of the bus bar 40 and the electrode terminal 2 can be easily adjusted by using a distance measuring sensor.
- the ranging sensor uses a known method that can measure the height, such as a triangulation method, TOF (Time-Of-Flight) type, capacitance type, eddy current type, ultrasonic type, contact type, etc. Height can be measured.
- a plurality of window portions 42 are opened in the bus bar 40 so that the electrode terminals 2 can be visually recognized from each window portion 42.
- different positions of the electrode terminals 2 can be confirmed through the plurality of window portions 42A and 42B. Therefore, the heights of different parts of the electrode terminals 2 can be measured and the bus bar can be confirmed. From the known thickness TB of 40, it is possible to calculate the gap GP at the welding position between the back surface of the bus bar 40 and the electrode terminal 2.
- the bus bar 40 forming the height HTR1 on the upper surface of the battery cell 1, the height HTF1 on the upper surface of the electrode terminal 2, and the window portion 42A by the distance measuring sensor RF.
- the height HBF1 of the upper surface of the above surface is measured.
- the gap GP0 at the welding position can be calculated.
- the gap GP0 at the welding position is the window portion. It is the average value of the gap GP1 in the 42A and the gap GP2 in the window portion 42B.
- the plurality of window portions 42 are separated so as to sandwich the fixed region FA to which the bus bar 40 and the electrode terminal 2 are connected and opened.
- the height of the electrode terminal 2 can be measured at two points facing each other across the fixed region FA. Therefore, in the gap between the electrode terminal 2 and the bus bar 40 measured at the window portions 42 on both sides of the fixed region FA. Therefore, the gap in the fixed region FA can be calculated more accurately.
- the fixed region FA is a laser welded region when the electrode terminal 2 and the bus bar 40 are fixed by laser welding as described above. It is preferable that the plurality of window portions 42 facing each other with the fixed region FA interposed therebetween are opened on the contour defining the connection position connected to the electrode terminal 2. As a result, in addition to detecting the height, that is, the gap, it is possible to confirm that the electrode terminal 2 is at the connection position with the same window portion 42. [Embodiment 2]
- FIG. 6 shows an example of a plan view of a connection piece 41B of a bus bar 40B having a plurality of windows 42A'and 42B'opened.
- the windows 42A'and 42B' are opened at diagonal positions of the electrode terminals 2, respectively. Since the height of the electrode terminal 2 can be measured at two diagonal points in this way, the gap between the electrode terminal 2 and the bus bar 40B can be calculated more accurately.
- the number of the plurality of windows is not limited to two, and it goes without saying that the number may be three or more.
- a window arranged in the middle on the left and right sides of the contour defining the connection position of the electrode terminal 2 arranged on the back surface side of the bus bar 40C.
- a window portion 42C is also formed in the middle of the lower side, and a total of three window portions 42 are used for positioning and confirmation of the gap.
- the upper and lower sides Window portions 42C and 42D are also formed in the middle to form a total of four window portions 42.
- the present invention does not limit the shape of the window portion to a rectangular shape, but a polygonal shape such as a rhombus, a hexagon, or an octagon. Any shape such as a circular shape, an elliptical shape, and a track shape can be used.
- the window portion does not necessarily have to be formed in an annular shape with its periphery closed, and it is sufficient if the electrode terminals on the lower surface of the bus bar can be visually recognized from above.
- the window portion 42E formed so that the upper left corner of the contour defining the connection position of the electrode terminal 2 can be visually recognized is the bus bar 40E. It is formed in a notch shape from the edge.
- the window portion opened in the bus bar means a shape in which a part of the electrode terminals on the back surface side of the bus bar can be visually recognized regardless of the name, and is used in the meaning including a notch.
- the contour portion of the electrode terminals may be the one in which only the inside is exposed.
- Such a window portion is mainly used for detecting the height of the electrode terminal, that is, the gap between the electrode terminal and the bus bar.
- the lower right window portion 42F is used only for detecting the height of the electrode terminal 2, and is not used for confirming the positioning of the electrode terminal 2.
- the present invention is not limited to this configuration, and as a window portion, an outer shape window portion for detecting the outer shape of the electrode terminal and a height window portion for detecting the height of the electrode terminal are opened, respectively. You may. By separating the window portion for the outer shape detection and the height detection in this way, it is possible to provide the window portion at a position suitable for the outer shape detection and a position suitable for the height detection, respectively. Further, since the outer shape can be detected and the height can be detected at each part, there is an advantage that a plurality of processes can be performed in parallel.
- the outer window portion 42-1 is provided diagonally of the electrode terminal 2, while the height window portion 42-2 sandwiches the welding position. It is provided on both sides.
- the present invention does not limit the number of windows to a plurality, and even if there is only one. good.
- the window portion by forming the window portion into an elongated shape, it is possible to detect the height of the electrode terminals exposed from the window portion at a plurality of portions and confirm the connection position.
- FIG. 11 An example of this is shown in FIG. 11 as a bus bar 40G of the power supply device according to the seventh embodiment.
- the window portion 42G is formed in a vertically long slit shape so as to vertically straddle the contour defining the connection position.
- the window portion has an elongated hole shape that is longer than the width of the electrode terminal.
- the opposite edges of the electrode terminals can be visually recognized from one window portion, and the inclination of the electrode terminals can be detected from the one window portion.
- the gap is calculated at the measurement position MP7 above the vertically elongated window portion 42G and the measurement position MP8 below, respectively, and is formed to the left and right of the measurement positions MP7 and MP8.
- the gap between the fixed area FA is estimated.
- the recess 2a is formed in the middle of the electrode terminals 2 as shown in FIG.
- the heights on both sides of the recess 2a can be measured to estimate the gap in the vicinity of the recess 2a. Further, when the recess 2a is formed in the middle of the electrode terminals 2, the recess 2a can be recognized as a reference position on the terminal plane.
- a plurality of fixed regions for fixing the bus bar and the electrode terminals may be provided in this way.
- fixed regions FA1 and FA2 are arranged on the left and right sides of the elongated window portion 42G.
- fixing such as laser welding can be performed at a plurality of locations in the vicinity of the region where the gap is detected, and the reliability of the connection between the bus bar 40G and the electrode terminal 2 can be improved.
- it can be said that it is preferable to arrange them so that the line connecting the plurality of fixed regions FA1 and FA2 intersects with the window portion 42G.
- the intersecting portion is excluded from the fixed region.
- the elongated common window portion 42 is not limited to a configuration in which the window portion 42 is opened so as to straddle the upper and lower sides of the contour defining the connection position as shown in FIG. 11, and is arranged so as to straddle the left and right sides of the contour, for example. May be good. Alternatively, it may be formed diagonally with respect to the rectangular contour.
- the window portion 42H is opened so as to connect the upper right corner and the lower left corner of the rectangular shape that defines the contour. Even with such an arrangement, the position of the electrode terminal 2 and the gap between the electrode terminal 2 and the bus bar 40H can be detected from the common window portion 42H, and the reliability of the connection between the electrode terminal 2 and the bus bar 40H can be maintained.
- the fixed region of the electrode terminal and the bus bar does not necessarily have to be provided in the center of the electrode terminal, and may be provided in a frame shape or a linear shape so as to follow the outer shape of the electrode terminal, for example.
- the fixed regions FA3 and FA4 are L-shaped, and the L-shaped fixed regions FA3 and FA4 are arranged so as to face each other along the connection position of the electrode terminal 2.
- a bus bar 40 is prepared which connects a battery laminate 10 in which a plurality of battery cells 1 having electrode terminals 2 are laminated and electrode terminals 2 of adjacent battery cells 1 to each other, and the window portion 42 is opened in advance. do.
- the bus bar 40 is superposed on the electrode terminal 2 of the battery cell 1, and a part of the electrode terminal 2 is visually recognized through the window portion 42 to check whether the bus bar 40 and the electrode terminal 2 are correctly positioned at the welding position. Check.
- the bus bar 40 whose positioning has been confirmed is welded to the battery cell 1. If the positioning fails, take necessary measures such as repositioning as necessary. In this way, even when the bus bar 40 is superposed on the electrode terminal 2, the lower electrode terminal 2 can be visually recognized through the window portion 42, so that the welding position and height can be confirmed, and the reliability of welding can be improved. It becomes possible to increase.
- the step of confirming the positioning is a step of visually recognizing a part of the electrode terminal 2 through the window 42 in a state where the bus bar 40 is overlapped with the electrode terminal 2 of the battery cell 1 and measuring the height of the electrode terminal 2. And, based on the known thickness of the bus bar 40, a step of calculating the gap between the back surface of the bus bar 40 and the front surface of the electrode terminal 2 can be included. As a result, by acquiring the gap between the back surface of the bus bar 40 and the electrode terminal 2, if the gap is large, it is possible to take necessary measures because the strength of welding between the bus bar 40 and the electrode terminal 2 cannot be secured. Can improve the reliability of.
- the above power supply device 100 can be used as a power source for a vehicle that supplies electric power to a motor that runs an electric vehicle.
- an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle that runs on both an engine and a motor, or an electric vehicle that runs only on a motor can be used, and is used as a power source for these vehicles. Will be done.
- a large number of the above-mentioned power supply devices 100 are connected in series or in parallel, and a large-capacity, high-output power supply device to which a necessary control circuit is added is constructed. do. (Power supply for hybrid vehicles)
- FIG. 13 shows an example in which the power supply device 100 is mounted on a hybrid vehicle traveling by both an engine and a motor.
- the vehicle HV equipped with the power supply device 100 shown in this figure is driven by a vehicle main body 91, an engine 96 for running the vehicle main body 91, a running motor 93, and these engines 96 and a running motor 93. It includes wheels 97, a power supply device 100 that supplies electric power to the motor 93, and a generator 94 that charges the batteries of the power supply device 100.
- the power supply device 100 is connected to the motor 93 and the generator 94 via the DC / AC inverter 95.
- the vehicle HV runs on both the motor 93 and the engine 96 while charging and discharging the battery of the power supply device 100.
- the motor 93 is driven to drive the vehicle in a region where the engine efficiency is low, for example, when accelerating or traveling at a low speed.
- the motor 93 is driven by being supplied with electric power from the power supply device 100.
- the generator 94 is driven by the engine 96 or by regenerative braking when braking the vehicle to charge the battery of the power supply device 100.
- the vehicle HV may be provided with a charging plug 98 for charging the power supply device 100. By connecting the charging plug 98 to an external power source, the power supply device 100 can be charged. (Power supply for electric vehicles)
- FIG. 14 shows an example in which the power supply device 100 is mounted on an electric vehicle traveling only by a motor.
- the vehicle EV equipped with the power supply device 100 shown in this figure supplies electric power to the vehicle main body 91, the traveling motor 93 for running the vehicle main body 91, the wheels 97 driven by the motor 93, and the motor 93.
- It includes a power supply device 100 for supplying power and a generator 94 for charging the battery of the power supply device 100.
- the power supply device 100 is connected to the motor 93 and the generator 94 via the DC / AC inverter 95.
- the motor 93 is driven by being supplied with electric power from the power supply device 100.
- the generator 94 is driven by the energy used for regenerative braking of the vehicle EV to charge the battery of the power supply device 100. Further, the vehicle EV is provided with a charging plug 98, and the charging plug 98 can be connected to an external power source to charge the power supply device 100. (Power supply device for power storage device)
- the present invention does not specify the use of the power supply device as the power supply of the motor that runs the vehicle.
- the power supply device according to the embodiment can also be used as a power source for a power storage device that charges and stores a battery with electric power generated by solar power generation, wind power generation, or the like.
- FIG. 15 shows a power storage device in which the battery of the power supply device 100 is charged by the solar cell 82 to store electricity.
- the power storage device shown in FIG. 15 charges the battery of the power supply device 100 with the electric power generated by the solar cells 82 arranged on the roof or roof of a building 81 such as a house or factory.
- This power storage device uses the solar cell 82 as a power source for charging, charges the battery of the power supply device 100 with the charging circuit 83, and then supplies power to the load 86 via the DC / AC inverter 85. Therefore, this power storage device has a charge mode and a discharge mode.
- the DC / AC inverter 85 and the charging circuit 83 are connected to the power supply device 100 via the discharge switch 87 and the charging switch 84, respectively.
- the ON / OFF of the discharge switch 87 and the charge switch 84 is switched by the power controller 88 of the power storage device.
- the power controller 88 switches the charging switch 84 to ON and the discharge switch 87 to OFF to allow the charging circuit 83 to charge the power supply device 100.
- the power controller 88 turns off the charging switch 84 and turns on the discharge switch 87 to switch to the discharge mode, and the power supply device 100 Allows discharge from to load 86.
- the charge switch 84 can be turned on and the discharge switch 87 can be turned on to supply power to the load 86 and charge the power supply device 100 at the same time.
- the power supply device can also be used as a power source for a power storage device that charges and stores batteries using midnight power at night.
- a power supply device charged with midnight power can be charged with midnight power, which is surplus power of a power plant, and output power in the daytime when the power load is large, so that the peak power in the daytime can be limited to a small value.
- the power supply can also be used as a power source for charging with both solar cell output and midnight power. This power supply device can effectively utilize both the power generated by the solar cell and the midnight power, and can efficiently store electricity while considering the weather and power consumption.
- the above-mentioned power storage system includes a backup power supply device that can be mounted in a computer server rack, a backup power supply device for a wireless base station such as a mobile phone, a power storage power supply for home or factory use, a power supply for street lights, and the like. It can be suitably used for power storage devices combined with solar cells, backup power sources for traffic lights and road traffic indicators, and the like.
- the power supply device is used as a power source for a large current used as a power source for a motor for driving an electric vehicle such as a hybrid vehicle, a fuel cell vehicle, an electric vehicle, or an electric motorcycle. It can be preferably used.
- a power supply device for a plug-in type hybrid electric vehicle, a hybrid type electric vehicle, an electric vehicle, or the like that can switch between an EV driving mode and a HEV driving mode can be mentioned.
- a backup power supply that can be mounted in a computer server rack, a backup power supply for wireless base stations such as mobile phones, a power storage device for home use and factories, a power supply for street lights, etc. , Can also be used as appropriate for backup power supplies such as traffic lights.
- Bus bar HA ... Height detection position FA, FA1, FA2 , FA3, FA4 ... Fixed regions GP0, GP1, GP2 ... Gap between the electrode terminal and the bus bar RF ...
- Distance measuring sensors HTR1, HTR2 ... Height of the upper surface of the battery cell HTF1, HTF ... Height of the upper surface of the electrode terminal HBF1, HBF2 ... Height of the upper surface of the bus bar TB ... Thickness of the bus bar HBR1, HBR2 ... Height of the back side of the bus bar HV, EV ... Vehicle
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Abstract
Description
[実施形態1]
(電池積層体10)
(電池セル1)
(電極端子2)
(絶縁スペーサ16)
(エンドプレート20)
(締結部材15)
(絶縁シート30)
(バスバー40)
(接続片41)
(窓部42)
[実施形態2]
[実施形態3]
[実施形態4]
[実施形態5]
[実施形態6]
[実施形態7]
[実施形態8]
[電源装置の製造方法]
(ハイブリッド車用電源装置)
(電気自動車用電源装置)
(蓄電装置用の電源装置)
1…電池セル
1X…端子面
1a…外装缶
1b…封口板
1c…ガス排出弁
2…電極端子
2a…凹部
10…電池積層体
15…締結部材;15a…締結主面;15d…折曲片
15f…ボルト
16…絶縁スペーサ
17…端面スペーサ
20…エンドプレート
30…絶縁シート;31…平板;32…折曲被覆部
40、40B、40C、40D、40E、40F、40G、40H…バスバー
41、41B…接続片
42、42A、42B、42A’、42B’、42C、42D、42E、42F、42G、42H…窓部
42-1…外形用窓部;42-2…高さ用窓部
81…建物
82…太陽電池
83…充電回路
84…充電スイッチ
85…DC/ACインバータ
86…負荷
87…放電スイッチ
88…電源コントローラ
91…車両本体
93…モータ
94…発電機
95…DC/ACインバータ
96…エンジン
97…車輪
98…充電プラグ
901…電池セル
802、902…電極端子
903…エンドプレート
904…バインドバー
910…電池積層体
840、940…バスバー
HA…高さ検出位置
FA、FA1、FA2、FA3、FA4…固定領域
GP0、GP1、GP2…電極端子とバスバーとの隙間
RF…測距センサ
HTR1、HTR2…電池セルの上面の高さ
HTF1、HTF…電極端子の上面の高さ
HBF1、HBF2…バスバーの上面の高さ
TB…バスバーの厚さ
HBR1、HBR2…バスバーの裏面側の高さ
HV、EV…車両
Claims (16)
- 外装缶の上面に電極端子を有する電池セルを複数積層した電池積層体と、
隣接する電池セルの前記電極端子同士を接続する、複数のバスバーと、
を備え、
前記バスバーは、平面視において前記電池セルの電極端子と重ねた状態で、該電極端子の一部を視認可能な窓部を開口してなる電源装置。 - 請求項1に記載の電源装置であって、
前記バスバーは、窓部を複数、開口させており、
各窓部から前記電極端子をそれぞれ視認可能としてなる電源装置。 - 請求項2に記載の電源装置であって、
前記バスバーが、前記複数の窓部を、前記バスバーと電極端子とが接続される固定領域を挟むように離間させて、開口させてなる電源装置。 - 請求項2又は3に記載の電源装置であって、
前記複数の窓部が、前記電極端子の対角線状の位置に開口されてなる電源装置。 - 請求項2~4のいずれか一項に記載の電源装置であって、
前記窓部が、
前記電極端子の外形を検出するための外形用窓部と、
前記電極端子の高さを検出するための高さ用窓部と
を含んでなる電源装置。 - 請求項1~5のいずれか一項に記載の電源装置であって、
前記窓部が、前記バスバーに矩形状に開口されてなる電源装置。 - 請求項1~6のいずれか一項に記載の電源装置であって、
前記窓部が、前記電極端子の幅よりも長い長穴状に開口されてなる電源装置。 - 請求項1~7のいずれか一項に記載の電源装置であって、
前記窓部が、前記電極端子よりも小さく形成されてなる電源装置。 - 請求項1~8のいずれか一項に記載の電源装置であって、
前記バスバーと前記電極端子との接続部位がレーザ溶接部位である電源装置。 - 請求項1~9のいずれか一項に記載の電源装置であって、
前記電極端子が、凹部を形成してなる電源装置。 - 請求項1~10のいずれか一項に記載の電源装置であって、
前記バスバーは、平面視において前記電池セルの電極端子と重ねた状態で、前記電極端子よりも大きく形成されてなる電源装置。 - 請求項1~11のいずれか一に記載の電源装置を備える車両であって、
前記電源装置と、該電源装置から電力供給される走行用のモータと、前記電源装置及び前記モータを搭載してなる車両本体と、前記モータで駆動されて前記車両本体を走行させる車輪とを備える車両。 - 請求項1~11のいずれか一に記載の電源装置を備える蓄電装置であって、
前記電源装置と、該電源装置への充放電を制御する電源コントローラとを備えており、前記電源コントローラでもって、外部からの電力により前記電池セルへの充電を可能とすると共に、該電池セルに対し充電を行うよう制御する蓄電装置。 - 電源装置の製造方法であって、
電極端子を有する電池セルを複数積層した電池積層体と、
隣接する電池セルの前記電極端子同士を接続するバスバーであって、窓部を予め開口してなるバスバーと
を準備する工程と、
前記バスバーを、前記電池セルの電極端子と重ねて、前記窓部を通じて前記電極端子の一部を視認して、前記バスバーと電極端子とが溶接位置に正しく位置決めされているかを確認する工程と、
前記位置決めが確認されたバスバーを、前記電池セルと溶接する工程と、
を含む電源装置の製造方法。 - 請求項14に記載の電源装置の製造方法であって、
前記位置決めを確認する工程が、
前記バスバーを前記電池セルの電極端子と重ねた状態で、前記窓部を通じて前記電極端子の一部を視認して、前記電極端子の高さを測定する工程と、
前記バスバーの既知の厚さに基づいて、該バスバーの裏面と前記電極端子の表面との間の隙間を演算する工程と、
を含む電源装置の製造方法。 - 請求項14又は15に記載の電源装置の製造方法であって、
前記バスバーを前記電池セルと溶接する工程が、レーザ溶接で行われてなる電源装置の製造方法。
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| US17/905,829 US12412939B2 (en) | 2020-03-31 | 2020-11-19 | Power supply device, and vehicle and power storage device each equipped with same |
| CN202080096504.1A CN115136406A (zh) | 2020-03-31 | 2020-11-19 | 电源装置和具备该电源装置的车辆以及蓄电装置 |
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| CN115136406A (zh) | 2022-09-30 |
| US20230123492A1 (en) | 2023-04-20 |
| JPWO2021199488A1 (ja) | 2021-10-07 |
| JP7649292B2 (ja) | 2025-03-19 |
| US12412939B2 (en) | 2025-09-09 |
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