WO2022239559A1 - 蓄電装置 - Google Patents
蓄電装置 Download PDFInfo
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- WO2022239559A1 WO2022239559A1 PCT/JP2022/015746 JP2022015746W WO2022239559A1 WO 2022239559 A1 WO2022239559 A1 WO 2022239559A1 JP 2022015746 W JP2022015746 W JP 2022015746W WO 2022239559 A1 WO2022239559 A1 WO 2022239559A1
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- WIPO (PCT)
- Prior art keywords
- power storage
- terminal
- board
- circuit board
- bus bar
- Prior art date
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/08—Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
-
- 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
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
-
- 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
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
-
- 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
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a power storage device that includes a circuit board and electrical equipment.
- Patent Document 1 discloses the structure of a battery pack including a plurality of battery cells (storage elements).
- This battery pack includes a BMS (Battery Management System) circuit board for controlling charging and discharging of storage elements, and a current sensor unit for measuring current.
- the current sensor unit is soldered to the BMS circuit board while standing vertically on the BMS circuit board.
- a bus bar is fastened to the end of the current sensor unit with bolts and nuts.
- a power storage device includes a circuit board such as a BMS circuit board and electrical equipment such as a relay or a current sensor unit, like the conventional battery pack described above.
- the terminal is electrically connected via a bus bar.
- High connection strength, low electrical resistance, ease of connection work, and the like are desired for connection portions between these plurality of conducting elements (circuit boards, electric devices, bus bars, etc.).
- the bus bar is connected by bolts and nuts to a portion of the current sensor unit that is different from the connection portion of the current sensor unit to the BMS circuit board. Therefore, there arises a problem that the external force applied to the current sensor unit by the bus bar tends to concentrate stress on the soldered joint between the current sensor unit and the BMS circuit board. Further, when a plurality of conductive elements are connected in series, the resistance values of the plurality of connection portions are accumulated in the current path between the storage element and the external terminal. This can lead to deterioration in the performance of the power storage device.
- the present invention has been made by the inventor of the present application with a new focus on the above problem, and an object of the present invention is to provide a power storage device with improved reliability.
- a power storage device is a power storage device including a power storage element, a circuit board, an electrical device, and a bus bar, wherein the circuit board is electrically connected to the substrate and the power storage element, and the A device terminal and a bus bar fixed to the electrical device are collectively fixed to the board terminal and electrically connected to the board terminal.
- FIG. 1 is a perspective view showing the appearance of a power storage device according to an embodiment.
- FIG. 2 is an exploded perspective view of the power storage device according to the embodiment.
- FIG. 3 is a perspective view showing a state in which the circuit board, the electric device, and the bus bar according to the embodiment are connected to each other.
- 4 is an exploded perspective view corresponding to FIG. 3.
- FIG. 5 is a side view corresponding to FIG. 3.
- a power storage device is a power storage device including a power storage element, a circuit board, an electrical device, and a bus bar, wherein the circuit board is electrically connected to the substrate and the power storage element, and the A device terminal and a bus bar fixed to the electrical device are collectively fixed to the board terminal and electrically connected to the board terminal.
- the electrical device such as the relay and the bus bar can be collectively fixed to the circuit board, and the electrical device and the circuit board can be electrically connected to the bus bar at one point. can. Therefore, even when the bus bar applies a mechanical load to the electrical equipment, the possibility of stress concentration on the connecting portion between the electrical equipment and the circuit board is reduced. Since the circuit board and the electric device are substantially directly attached to the bus bar, the resistance value in the current path connecting the bus bar to the circuit board and the electric device can be made relatively small.
- the power storage device according to this aspect is a power storage device with improved reliability.
- the device terminal and the bus bar may be fixed to the board terminal in a state of being superimposed on the board terminal in this order.
- the busbar is positioned at the top in the connecting portion of the board terminal, the device terminal, and the busbar. Therefore, when a cover member such as an inner cover or an outer cover is arranged from above the circuit board, the busbar can be arranged in a state of being fixed to the cover member. That is, the busbar can be positioned by arranging the cover member at a predetermined position. Accordingly, a power storage device with improved reliability can be efficiently manufactured.
- the power storage device further includes an exterior body that houses the power storage element, the exterior body is provided with an external terminal, and the bus bar is a single conductive member connected to the external terminal. good too.
- the busbars connected to the external terminals for exchanging power with devices outside the power storage device are directly mechanically and electrically connected to the electrical device and the circuit board. Therefore, the resistance value in the main current path (power line) during charging and discharging of the power storage device is suppressed. This contributes to improving the reliability of the power storage device.
- the power storage device further includes a fixing member that fixes the device terminal and the bus bar to the board terminal, and one of a nut and a bolt included in the fixing member is fixed to the board terminal.
- the device terminal and the bus bar may be fixed to the board terminal by fastening the other bolt to the one.
- the electrical device may be a relay that switches on and off electrical connection between the power storage element and the bus bar according to a signal transmitted from the circuit board.
- the relay on the main current path (power line) in the power storage device can be fixed to the circuit board together with the bus bar.
- a mechanical relay switch is used for the relay on the power line, so it is relatively heavy. Therefore, collectively fixing the electrical equipment, which is a relay, to the busbar and the circuit board is useful for improving the vibration resistance or shock resistance of the relatively heavy electrical equipment. This contributes to improving the reliability of the power storage device.
- the longitudinal direction of the exterior body of the power storage device is defined as the X-axis direction.
- a Y-axis direction is defined as the lateral direction of the exterior body of the power storage device, the facing direction of the short side surfaces of the container of the power storage element, or the direction in which a pair of electrode terminals are arranged in one power storage element.
- the direction in which the main body and lid of the exterior body of the power storage device are aligned, the direction in which the busbar holders and power storage element units are aligned, or the vertical direction is defined as the Z-axis direction.
- X-axis direction, Y-axis direction, and Z-axis direction are directions that cross each other (perpendicularly in this embodiment).
- the Z-axis direction may not be the vertical direction, but for convenience of explanation, the Z-axis direction will be described below as the vertical direction.
- the positive direction of the X-axis indicates the direction of the arrow on the X-axis
- the negative direction of the X-axis indicates the direction opposite to the positive direction of the X-axis.
- a simple reference to the "X-axis direction" means either or both directions parallel to the X-axis. The same applies to terms relating to the Y-axis and Z-axis.
- FIG. 1 is a perspective view showing the appearance of a power storage device 1 according to an embodiment.
- FIG. 2 is an exploded perspective view of the power storage device 1 according to the embodiment.
- bus bars joined to the electrode terminals 120 of the storage element 100 and wiring connected to the electrical equipment 80.
- the illustration and description of the members of (1) are omitted as appropriate.
- the power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment.
- the power storage device 1 is, for example, a battery module (assembled battery) used for power storage or power supply.
- the power storage device 1 is used for driving mobile bodies such as automobiles, motorcycles, water crafts, ships, snowmobiles, agricultural machinery, construction machinery, or railway vehicles for electric railways, or for starting engines. Used as a battery or the like.
- the vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and fossil fuel (gasoline, light oil, liquefied natural gas, etc.) vehicles.
- Examples of railway vehicles for the electric railway include electric trains, monorails, linear motor cars, and hybrid trains having both diesel engines and electric motors.
- the power storage device 1 can also be used as a stationary battery or the like for home or business use.
- the power storage device 1 includes an exterior body 10 and a power storage element unit 150 housed in the exterior body 10 .
- the exterior body 10 is arranged outside the power storage element units 150, fixes them at predetermined positions, and protects them from impacts and the like.
- exterior body 10 is a box-shaped (substantially rectangular parallelepiped) container (module case) that constitutes the housing of power storage device 1 .
- the exterior body 10 is made of, for example, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate ( PET), polybutylene terephthalate (PBT), polyetheretherketone (PEEK), tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyethersulfone (PES), polyamide (PA) , ABS resin, or an insulating member such as a composite material thereof, or a metal coated with an insulating coating.
- PC polycarbonate
- PP polypropylene
- PE polyethylene
- PS polystyrene
- PPS polyphenylene sulfide resin
- PPE polyphenylene ether
- PPE polyphenylene ether
- PET polyethylene terephthalate
- the exterior body 10 thereby avoids contact of the electric storage element unit 150 and the like with external metal members and the like.
- the exterior body 10 may be made of a conductive material such as metal as long as the electrical insulation between the exterior body 10 and the power storage element unit 150 or the like is maintained.
- the exterior body 10 has an exterior body main body 12 and a lid body 11 .
- the exterior body main body 12 is a bottomed rectangular cylindrical housing having an opening 12a formed in the positive direction of the Z axis, and accommodates the electric storage element unit 150 and the like.
- the lid 11 is a rectangular member that closes the opening 12a of the exterior main body 12 .
- the lid body 11 is preferably airtightly or watertightly joined to the exterior body main body 12 by an adhesive, heat sealing, ultrasonic welding, laser welding, or the like.
- a pair of external terminals 13 which are a pair of positive and negative module terminals, are arranged on the lid 11 .
- the power storage device 1 charges electricity from the outside and discharges electricity to the outside through the pair of external terminals 13 .
- the external terminal 13 is made of a conductive member made of metal such as aluminum, aluminum alloy, copper, copper alloy, or the like.
- the positive external terminal 13 is described as “external terminal 13a”
- the negative external terminal 13 is described as “external terminal 13b”.
- the power storage element unit 150 has one or more power storage elements 100 .
- a power storage element unit 150 is configured by connecting eight power storage elements 100 with a plurality of bus bars (not shown). These eight power storage elements 100 are connected in series by, for example, seven bus bars.
- the electrical connection mode of the eight power storage elements 100 is not limited to this. When two power storage elements 100 connected in parallel form one subunit, four subunits may be connected in series with three bus bars.
- the storage element unit 150 may further include members (not shown) such as spacers arranged between the adjacent storage elements 100 and restraining members that restrict the plurality of storage elements 100 in the alignment direction.
- the power storage element 100 is a secondary battery (single battery) capable of charging and discharging electricity, specifically a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery.
- the storage element 100 has a flat rectangular parallelepiped (rectangular) container 110 and a pair of electrode terminals 120 (on the positive electrode side and the negative electrode side) fixed to the container 110 . Inside the container 110, an electrode assembly, a current collector, an electrolytic solution, and the like (not shown) are accommodated.
- An example of the electrode body of the storage element 100 is a wound electrode body formed by winding a positive electrode plate and a negative electrode plate with a separator sandwiched between them in layers.
- the storage element 100 may be provided with a laminated (stacked) electrode body formed by stacking a plurality of flat plate-shaped electrode plates, or a bellows-shaped electrode body formed by folding the electrode plates into a bellows shape.
- the power storage element 100 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, or may be a capacitor.
- the power storage device 100 may be a primary battery that can use stored electricity without being charged by the user, instead of a secondary battery.
- the storage element 100 may be a battery using a solid electrolyte.
- the storage element 100 may be a pouch-type storage element.
- the shape of the electric storage element 100 is not limited to the rectangular shape described above, and may be other shapes such as a polygonal columnar shape, a cylindrical shape, an elliptical columnar shape, and an oval columnar shape.
- the container 110 has a pair of long side surfaces 110a, a pair of short side surfaces 110b, and a terminal arrangement surface 110c.
- the terminal arrangement surface 110c is a surface on which the positive and negative electrode terminals 120 are arranged.
- a gas exhaust valve 105 is further arranged on the terminal arrangement surface 110c.
- the gas discharge valve 105 is a portion that receives the internal pressure and opens to discharge the gas inside the container 110 to the outside.
- the plurality of power storage elements 100 are arranged in a posture in which the long side surfaces 110a are oriented in the alignment direction (X-axis direction).
- a circuit board 50 and an electric device 80 are arranged between the storage element unit 150 and the lid 11 .
- the circuit board 50 is a control circuit board called BMU (Battery Management Unit) in this embodiment.
- BMU Battery Management Unit
- the circuit board 50 detects the voltage and the like of each of the plurality of power storage elements 100 and controls the state of charge of the plurality of power storage elements 100 .
- the circuit board 50 is electrically connected to each of the plurality of power storage elements 100 via wiring (detection lines) for voltage detection (not shown). Voltage can be measured.
- the circuit board 50 has a plurality of electronic components mounted on a substrate 51 which is, for example, a printed circuit board, but illustration of these electronic components is omitted.
- the electrical device 80 is a relay having a mechanical relay switch in this embodiment.
- the electrical device 80 has a function of switching on and off charging or discharging of the plurality of power storage elements 100 under the control of the circuit board 50 .
- the electric device 80 is connected to the total plus terminal of the storage element unit 150 via the busbar 75 and is also connected via the busbar 70 to the positive external terminal 13 (external terminal 13a).
- the total positive terminal of the storage element unit 150 is, for example, the positive electrode terminal 120 of the storage element 100 at the end in the positive direction of the X-axis in FIG.
- the circuit board 50 and the electric device 80 configured in this manner are fixed to an insulating member such as a busbar holder (not shown) disposed above the power storage element 100 (in the positive direction of the Z axis), and are mounted on the exterior body. 10 is housed inside.
- the circuit board 50 and the electric device 80 are electrically connected, and the electric device 80 and the bus bar 70 are also electrically connected.
- the three members of the circuit board 50, the electric device 80, and the bus bar 70 are electrically and mechanically connected at one point. In other words, the connection of the three members is put together in one place. Additional features of such a connection structure will be described below with reference to FIGS. 3 to 5.
- FIG. 3 is a perspective view showing a state in which circuit board 50, electric device 80, and bus bar 70 are connected to each other according to the embodiment.
- 4 is an exploded perspective view corresponding to FIG. 3.
- FIG. 5 is a side view corresponding to FIG. 3.
- FIG. 5 shows a side view of the circuit board 50, the electric device 80, and the bus bar 70, which are connected to each other, viewed from the negative direction of the X-axis. The illustration of 13a is omitted.
- the electrical device 80 is shown supported only by the board terminals 52 , but the electrical device 80 is further supported by an insulating member such as a busbar holder arranged above the storage element unit 150 . may
- the circuit board 50 includes a board 51 and board terminals 52 projecting from the board 51 in the positive Z-axis direction.
- the electrical device 80 includes a flat device terminal 82 fixed to the board terminal 52 by a fixing member 90 .
- fixing member 90 has bolt 91 and nut 95 . That is, the device terminal 82 is mechanically and electrically connected to the board terminal 52 by fastening the bolt 91 passing through the device terminal 82 and the board terminal 52 to the nut 95 .
- the board terminal 52 is formed in a box shape to accommodate the nut 95 therein, and has a through hole 52a formed at a position facing the screw hole of the nut 95. have.
- a bolt 91 inserted through a through hole 82 a provided in the device terminal 82 passes through the through hole 52 a and is fastened to a nut 95 . Since the board terminal 52 also functions as a detent for the nut 95, the bolt 91 can be easily tightened.
- the nut 95 is shown separated from the board terminal 52 in order to clearly show the nut 95, but the nut 95 and the board terminal 52 may not be separated.
- the nut 95 is fixed to the board terminal 52 by welding or the like, so that the board terminal 52 can be handled as one component to which the nut 95 is fixed.
- the nut 95 may be provided integrally with the board terminal 52 as a part of the board terminal 52 . In other words, the nut 95 may have a lead portion that is joined to the wiring of the substrate 51 .
- the fixing member 90 also serves to mechanically and electrically connect the busbar 70 to the electrical equipment 80 . That is, the busbars 70 and the device terminals 82 are collectively fixed to the board terminals 52 by the bolts 91 and nuts 95 .
- the bus bar 70 has a through hole 70a through which the bolt 91 is passed at one end, and a through hole 70b for fixing the external terminal 13a at the other end. That is, the bolt 91 of the fixing member 90 is inserted through the through hole 70a of the bus bar 70, the through hole 82a of the device terminal 82, and the through hole 52a of the board terminal 52 in this order, and is fastened to the nut 95. be done.
- the external terminal 13 a is electrically connected to the electric device 80 and the circuit board 50 via the bus bar 70 .
- the circuit board 50 with the electrical equipment 80 and the busbars 70 fixed to the board terminals 52 is attached to a busbar holder or the like on which the circuit board 50 is mounted by screws passing through the plurality of screw holes 50a (see FIG. 4). may be fixed to a member of the
- the circuit board 50 which is a control circuit board, is electrically connected to the negative external terminal 13 (external terminal 13b) via a bus bar (not shown), and operates by power received via the external terminals 13a and 13b.
- the electric device 80 which is a relay, is arranged in the middle of the current path between the external terminal 13a and the storage element unit 150, and is connected to the circuit board 50 by a signal line (not shown).
- the signal line extending from the circuit board 50 has a connector at its end, and the signal line is connected to the electric device 80 by inserting the connector into the socket 85 of the electric device 80 . Therefore, the electrical device 80 can receive a signal (control signal) from the circuit board 50 via the signal line, and can switch the relay switch on and off according to the control signal.
- charging and discharging of the power storage device 1 are switched on and off.
- power storage device 1 includes power storage element 100 , circuit board 50 , electrical device 80 , and bus bar 70 .
- the circuit board 50 has a board 51 and a board terminal 52 electrically connected to the power storage element 100 and fixed to the board 51 .
- the device terminals 82 and the busbars 70 fixed to the electric device 80 are collectively fixed to the board terminals 52 , thereby being electrically connected to the board terminals 52 .
- the electrical device 80 and the busbar 70 can be collectively fixed to the circuit board 50, and the electrical device 80 and the circuit board 50 can be electrically connected to the busbar 70 at one point. be able to. Therefore, even when the bus bar 70 applies a dynamic load to the electric device 80, the possibility of stress concentration on the connecting portion between the electric device 80 and the circuit board 50 is reduced. Since the circuit board 50 and the electric device 80 are substantially directly attached to the bus bar 70, the resistance values in the current paths connecting the bus bar 70 and the circuit board 50 and the electric device 80 are relatively low. can be made smaller. By collecting the connections of the three members in one place, the power storage device 1 can be efficiently manufactured.
- the power storage device 1 is a power storage device with improved reliability.
- the device terminals 82 and the bus bars 70 are fixed to the board terminals 52 in a state of being superimposed on the board terminals 52 in this order. It is
- the bus bar 70 is positioned at the top of the connecting portion between the board terminal 52, the device terminal 82 and the bus bar 70. As shown in FIG. Therefore, when the lid body 11 is arranged from above the circuit board 50 housed in the exterior body body 12 , the bus bar 70 can be arranged in a state of being fixed to the lid body 11 . When the busbar 70 is integrated with the lid 11 by insert molding, the busbar 70 can be positioned by attaching the lid 11 to the exterior body 12 . As a result, power storage device 1 with improved reliability can be efficiently manufactured.
- the operation of tightening the bolt 91 through the opening after the lid 11 is joined to the exterior main body 12 is performed. It can be performed. Further, by covering the opening with a cover plate made of, for example, a resin material, the exterior body 10 can be kept airtight.
- power storage device 1 includes exterior body 10 that accommodates power storage element 100 .
- External terminals 13 are arranged on the exterior body 10 , and the bus bar 70 is a single conductive member connected to the external terminals 13 .
- the positive electrode external terminal 13 (external Terminal 13a) is fixed.
- the bus bar 70 connected to the external terminal 13 that exchanges electric power with an external device of the power storage device 1 is directly and electrically connected to the electric device 80 and the circuit board 50 . be. Therefore, the resistance value in the main current path (power line) during charging and discharging of the power storage device 1 is suppressed. This contributes to improving the reliability of the power storage device 1 .
- the power storage device 1 includes fixing members 90 that fix the device terminals 82 and the busbars 70 to the board terminals 52 .
- a nut 95 of a fixing member 90 is fixed to the board terminal 52
- the device terminal 82 and the bus bar 70 are fixed to the board terminal 52 by fastening with a bolt 91 of the fixing member 90 .
- the nut 95 is fixed to the board terminal 52, the work of collectively fixing the device terminal 82 and the bus bar 70 to the board terminal 52 can be easily performed. This effect is exhibited even when a bolt 91 is fixed to the board terminal 52 and a nut 95 is fastened to the bolt 91 . That is, if one of the nut 95 and the bolt 91 of the fixing member 90 is fixed to the board terminal 52 and the other of the nut 95 and the bolt 91 is fastened to the one, the fixing work described above can be performed. is facilitated.
- electrical device 80 is a relay that switches electrical connection between power storage element 100 and bus bar 70 on and off in accordance with a signal transmitted from circuit board 50 .
- the relay on the main current path (power line) in power storage device 1 can be fixed to circuit board 50 together with bus bar 70 .
- a mechanical relay switch is used for the relay on the power line, so it is relatively heavy. Therefore, collectively fixing the electrical device 80, which is a relay, to the bus bar 70 and the circuit board 50 is useful for improving the vibration resistance or shock resistance of the relatively heavy electrical device 80.
- FIG. This contributes to improving the reliability of the power storage device 1 .
- the direction in which the board terminals 52, the device terminals 82, and the busbars 70 are stacked need not be the vertical direction (Z-axis direction).
- the board terminals 52, the device terminals 82, and the busbars 70 may be stacked in the horizontal direction (direction parallel to the XY plane).
- the bolt 91 is fastened to the nut 95 while penetrating through these three members with its axial direction parallel to the lamination direction of these three members. As a result, these three members are mechanically and electrically connected together and collectively.
- the board 51 may be provided with the bolt 91 by inserting the shaft portion of the bolt 91 through the through hole 52a of the board terminal 52 from below.
- the board terminal 52 and the bolt 91 may be joined by welding or the like.
- a part of the bolt 91 may function as the board terminal 52 by providing the head of the bolt 91 with a lead part that is joined to the wiring of the board 51 .
- the shaft portion of the bolt 91 erected on the substrate 51 can be inserted through the through hole 82 a of the device terminal 82 and the through hole 70 a of the bus bar 70 and fastened to the nut 95 .
- the electrical device 80 and the busbar 70 can be collectively fixed to the circuit board 50, and the electrical device 80 and the circuit board 50 can be electrically connected to the busbar 70 at one point.
- the method by which the fixing member 90 fixes the busbar 70 and the device terminals 82 of the electrical device 80 to the board terminals 52 is not limited to fastening with the bolts 91 and nuts 95 .
- Busbars 70 and device terminals 82 may be secured to board terminals 52 by other techniques such as welding, crimping or press fitting.
- the board terminals 52, the device terminals 82, and the busbars 70 may be detachably fixed.
- the board terminals 52, the device terminals 82, and the busbars 70 may be non-detachably fixed.
- the board terminal 52 may protrude from the peripheral edge of the board 51 .
- the substrate terminal 52 may protrude from the peripheral edge of the substrate 51 in a direction perpendicular to the substrate 51 or in a direction parallel to the substrate 51 .
- the electrical device 80 is not limited to a relay, and may be a protection circuit with a fuse, or another type of electrical device such as a current meter with a shunt resistor.
- the circuit board 50 is also not limited to a control circuit board, but simply a measurement circuit board for measuring voltage or temperature, etc., or other types of communication circuit board forming an electronic circuit for communication. It may be a circuit board.
- the external terminal 13 connected to the electrical device 80 via the busbar 70 may be the negative external terminal 13 (external terminal 13b).
- the power storage device 1 does not need to be provided with a closed exterior body like the exterior body 10 shown in FIG.
- the power storage device 1 may include an exterior body having a plurality of openings (through holes) for heat dissipation in the wall. Even if a restraining member that restrains the plurality of power storage elements 100 of the power storage element unit 150 in the alignment direction holds the power storage element unit 150 and functions as an exterior body in which the pair of external terminals 13 and the like are arranged. good.
- Power storage device 1 may not include an exterior body.
- external terminals 13 shown in FIG. may serve as external terminals.
- a cable connected to the bus bar 70 inside the exterior body 10 may be pulled out of the exterior body 10 to serve as an external terminal.
- the present invention can be applied to a power storage device having a power storage element such as a lithium ion secondary battery.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
[1.蓄電装置の全般的な説明]
まず、実施の形態に係る蓄電装置1の概略構成について図1及び図2を用いて説明する。図1は、実施の形態に係る蓄電装置1の外観を示す斜視図である。図2は、実施の形態に係る蓄電装置1の分解斜視図である。外装体10の内部には、図2以降の図に示される部材に加え、蓄電素子100の電極端子120に接合されたバスバー及び電気機器80に接続される配線等が収容されているが、これらの部材の図示及び説明は適宜省略する。
図3は、実施の形態に係る回路基板50、電気機器80、及びバスバー70が相互に接続された状態を示す斜視図である。図4は、図3に対応する分解斜視図である。図5は、図3に対応する側面図である。図5では、相互に接続された状態の回路基板50、電気機器80、及びバスバー70を、X軸マイナス方向から見た場合の側面図が表されており、図3及び図4に示す外部端子13aの図示は省略されている。図5では、電気機器80は、基板端子52のみで支持された状態で図示されているが、電気機器80はさらに、蓄電素子ユニット150の上方に配置されるバスバーホルダ等の絶縁部材によって支持されてもよい。
以上、本発明の実施の形態に係る蓄電装置1について説明したが、本発明は、この実施の形態に限定されるものではない。今回開示された実施の形態は、全ての点で例示であって制限的なものではなく、本発明の範囲には、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれる。
10 外装体
13、13a、13b 外部端子
50 回路基板
51 基板
52 基板端子
70、75 バスバー
80 電気機器
82 機器端子
90 固定部材
91 ボルト
95 ナット
100 蓄電素子
Claims (6)
- 蓄電素子、回路基板、電気機器、及びバスバーとを備える蓄電装置であって、
前記回路基板は、基板と、前記蓄電素子と電気的に接続され、前記基板に固定された基板端子とを有し、
前記電気機器に固定された機器端子及び前記バスバーは、一括して前記基板端子に固定されることで、前記基板端子に電気的に接続されている、
蓄電装置。 - 前記蓄電素子に対する前記回路基板の位置を上とした場合において、前記機器端子及び前記バスバーは、前記基板端子の上にこの順で重ねられた状態で、前記基板端子に固定されている、
請求項1記載の蓄電装置。 - 前記蓄電素子を収容する外装体をさらに備え、
前記外装体には、外部端子が配置されており、
前記バスバーは、前記外部端子と接続された単体の導電部材である、
請求項1または2記載の蓄電装置。 - 前記機器端子及び前記バスバーを前記基板端子に固定する固定部材をさらに備え、
前記基板端子には、前記固定部材が有するナット及びボルトの一方が固定されており、前記ナット及び前記ボルトの他方が前記一方に締結されることで、前記機器端子及び前記バスバーが前記基板端子に固定されている、
請求項1~3のいずれか一項に記載の蓄電装置。 - 前記電気機器は、前記回路基板から送信される信号に応じて、前記蓄電素子と前記バスバーとの電気的な接続のオン及びオフを切り替えるリレーである、
請求項1~4のいずれか一項に記載の蓄電装置。 - 前記基板端子は前記基板の周縁から突出している、
請求項1~5のいずれか一項に記載の蓄電装置。
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EP22807263.3A EP4303901A1 (en) | 2021-05-11 | 2022-03-30 | Power storage device |
JP2023520915A JPWO2022239559A1 (ja) | 2021-05-11 | 2022-03-30 | |
CN202280028154.4A CN117121279A (zh) | 2021-05-11 | 2022-03-30 | 蓄电装置 |
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JP (1) | JPWO2022239559A1 (ja) |
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Citations (7)
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JP2014137223A (ja) * | 2013-01-15 | 2014-07-28 | Yazaki Corp | シャント抵抗式電流センサ及びシャント抵抗式電流センサの取付構造 |
JP2015153675A (ja) * | 2014-02-18 | 2015-08-24 | 株式会社デンソー | 電池ユニット |
JP2018125255A (ja) * | 2017-02-03 | 2018-08-09 | カルソニックカンセイ株式会社 | 組電池 |
JP2019197661A (ja) * | 2018-05-09 | 2019-11-14 | 株式会社Gsユアサ | 蓄電装置 |
JP2020087860A (ja) * | 2018-11-30 | 2020-06-04 | 株式会社デンソー | 電源装置 |
JP2020517075A (ja) | 2017-11-06 | 2020-06-11 | エルジー・ケム・リミテッド | 組立構造が向上したバッテリーパック |
JP2020149847A (ja) * | 2019-03-13 | 2020-09-17 | 株式会社Gsユアサ | 蓄電装置 |
-
2022
- 2022-03-30 CN CN202280028154.4A patent/CN117121279A/zh active Pending
- 2022-03-30 WO PCT/JP2022/015746 patent/WO2022239559A1/ja active Application Filing
- 2022-03-30 JP JP2023520915A patent/JPWO2022239559A1/ja active Pending
- 2022-03-30 EP EP22807263.3A patent/EP4303901A1/en active Pending
Patent Citations (7)
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JP2014137223A (ja) * | 2013-01-15 | 2014-07-28 | Yazaki Corp | シャント抵抗式電流センサ及びシャント抵抗式電流センサの取付構造 |
JP2015153675A (ja) * | 2014-02-18 | 2015-08-24 | 株式会社デンソー | 電池ユニット |
JP2018125255A (ja) * | 2017-02-03 | 2018-08-09 | カルソニックカンセイ株式会社 | 組電池 |
JP2020517075A (ja) | 2017-11-06 | 2020-06-11 | エルジー・ケム・リミテッド | 組立構造が向上したバッテリーパック |
JP2019197661A (ja) * | 2018-05-09 | 2019-11-14 | 株式会社Gsユアサ | 蓄電装置 |
JP2020087860A (ja) * | 2018-11-30 | 2020-06-04 | 株式会社デンソー | 電源装置 |
JP2020149847A (ja) * | 2019-03-13 | 2020-09-17 | 株式会社Gsユアサ | 蓄電装置 |
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JPWO2022239559A1 (ja) | 2022-11-17 |
EP4303901A1 (en) | 2024-01-10 |
CN117121279A (zh) | 2023-11-24 |
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