WO2016035334A1 - 蓄電装置及び蓄電装置の検査方法 - Google Patents
蓄電装置及び蓄電装置の検査方法 Download PDFInfo
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- WO2016035334A1 WO2016035334A1 PCT/JP2015/004458 JP2015004458W WO2016035334A1 WO 2016035334 A1 WO2016035334 A1 WO 2016035334A1 JP 2015004458 W JP2015004458 W JP 2015004458W WO 2016035334 A1 WO2016035334 A1 WO 2016035334A1
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- power storage
- electrode terminal
- bus bar
- height
- storage device
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Definitions
- the present invention relates to a power storage device including a power storage element and a method for inspecting a power storage device.
- a configuration in which a bus bar connected to the power storage element is provided is known.
- the bus bar is joined to the electrode terminal by welding the bus bar to the electrode terminal of the power storage element (see, for example, Patent Document 1).
- the conventional power storage device has a problem that a bonding failure may occur in the connection between the electrode terminal of the power storage element and the bus bar.
- the present invention has been made to solve the above problem, and provides a power storage device and a method for inspecting a power storage device that can suppress the occurrence of poor bonding in the connection between the electrode terminal of the power storage element and the bus bar. For the purpose.
- a power storage device is a power storage device including a power storage element, the electrode terminal provided in the power storage element, disposed on a surface of the electrode terminal, A bus bar connected to the electrode terminal, and the bus bar has a plurality of openings formed so that a surface of the electrode terminal is exposed.
- the present invention can be realized not only as such a power storage device, but also as a method for inspecting a power storage device that can suppress the occurrence of poor bonding. It can also be realized as a bus bar provided.
- the present invention can be realized not only as an inspection method for a power storage device as described above, but also as an inspection device including a processing unit that performs characteristic processing included in the inspection method for the power storage device. Can do.
- it can be realized as a program or an integrated circuit that causes a computer to execute characteristic processing included in the method for inspecting the power storage device. Such a program can be distributed via a recording medium such as a CD-ROM and a transmission medium such as the Internet.
- the power storage device of the present invention it is possible to suppress the occurrence of bonding failure in the bonding between the electrode terminal of the power storage element and the bus bar.
- FIG. 1 is a perspective view showing an external appearance of a power storage device according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view showing each component when the power storage device according to the embodiment of the present invention is disassembled.
- FIG. 3 is a perspective view showing the configuration of the power storage unit according to the embodiment of the present invention.
- FIG. 4 is a perspective view showing the configuration of the power storage unit according to the embodiment of the present invention.
- FIG. 5 is a perspective view showing the configuration of the energy storage device according to the embodiment of the present invention.
- FIG. 6 is a perspective view showing the configuration of the bus bar according to the embodiment of the present invention.
- FIG. 7 is a plan view showing the configuration of the bus bar according to the embodiment of the present invention.
- FIG. 1 is a perspective view showing an external appearance of a power storage device according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view showing each component when the power storage device according to the embodiment of the present invention is disassembled.
- FIG. 8 is a perspective view showing the configuration of the bus bar frame according to the embodiment of the present invention.
- FIG. 9 is a perspective view showing a configuration in a state where the bus bar is arranged on the bus bar frame according to the embodiment of the present invention.
- FIG. 10 is a perspective view showing a configuration in a state where bus bars are arranged on a plurality of power storage elements according to the embodiment of the present invention.
- FIG. 11 is a plan view showing a configuration in a state where bus bars are arranged on a plurality of power storage elements according to the embodiment of the present invention.
- FIG. 12 is a plan view showing a configuration in a state where bus bars are arranged and joined on a plurality of power storage elements according to the embodiment of the present invention.
- FIG. 13 is a flowchart illustrating a method for testing a power storage device according to an embodiment of the present invention.
- FIG. 14 is a diagram for explaining an inspection method for a power storage device according to an embodiment of the present invention.
- FIG. 15 is a diagram for explaining an inspection method for a power storage device according to an embodiment of the present invention.
- the present invention has been made to solve the above problem, and provides a power storage device and a method for inspecting a power storage device that can suppress the occurrence of poor bonding in the connection between the electrode terminal of the power storage element and the bus bar. For the purpose.
- a power storage device is a power storage device including a power storage element, the electrode terminal provided in the power storage element, disposed on a surface of the electrode terminal, A bus bar connected to the electrode terminal, and the bus bar has a plurality of openings formed so that a surface of the electrode terminal is exposed.
- the power storage device is provided on the surface of the electrode terminal of the power storage element and includes a bus bar connected to the electrode terminal, and the bus bar is formed so that the surface of the electrode terminal is exposed.
- a plurality of openings That is, since the surface of the electrode terminal of the electricity storage element is exposed from a plurality of openings formed in the bus bar, the height of the exposed portion of the surface of the electrode terminal is measured, so that the electrode terminal and the bus bar are The clearance between them can be measured. For this reason, according to the power storage device, the electrode terminal and the bus bar can be joined while monitoring the clearance between the electrode terminal of the power storage element and the bus bar. It can be suppressed from occurring.
- the power storage device includes a plurality of power storage elements each having an electrode terminal, and the bus bar is formed so that a surface of the electrode terminal is exposed for each of the electrode terminals of the plurality of power storage elements. You may decide to have an opening part.
- the bus bar has, for each electrode terminal, three or more openings formed so that the surface of the electrode terminal is exposed. That is, since the three or more surface portions of the electrode terminal are exposed from the three or more openings, the height of the three or more exposed portions can be measured. For this reason, since the height and inclination of the surface of the electrode terminal can be calculated from the height of the three or more exposed portions of the electrode terminal, the clearance between the electrode terminal and the bus bar can be calculated. It is possible to suppress the occurrence of bonding failure in the bonding between the electrode terminal and the bus bar.
- the three or more openings may be formed so that exposed portions of the surface of the electrode terminal are not arranged in a straight line.
- the heights of the three or more exposed portions that are not arranged linearly are used.
- the height and inclination of the surface of the electrode terminal can be accurately calculated.
- the clearance between the electrode terminal and the bus bar can be accurately calculated, and it is possible to suppress the occurrence of poor bonding in the bonding between the electrode terminal and the bus bar.
- the plurality of openings may be formed so that the outer peripheral portion of the surface of the electrode terminal is exposed.
- the height of the outer peripheral portion of the surface of the electrode terminal can be measured.
- the height of the surface of the electrode terminal can be calculated from the height of the plurality of locations in the center portion of the surface of the electrode terminal. It is possible to calculate the accuracy more accurately. For this reason, since the height of the surface of the electrode terminal can be calculated from the height of the outer peripheral portion of the surface of the electrode terminal, the height of the surface of the electrode terminal can be calculated more accurately.
- the plurality of openings may be notches formed in the outer edge portion of the bus bar.
- a plurality of openings are formed in the bus bar by forming notches in the outer edge portion of the bus bar.
- the bus bar may be warped due to burrs or the like.
- a notch in the outer edge portion of the bus bar it is possible to suppress the bus bar from being warped on the electrode terminal, and to suppress occurrence of poor bonding in the bonding between the electrode terminal and the bus bar. it can.
- the plurality of openings may be formed so that exposed portions of the surface of the electrode terminal are arranged in a straight line.
- the plurality of openings formed in the bus bar are formed so that the exposed portions of the surface of the electrode terminal are arranged in a straight line. For this reason, when measuring the height of the plurality of exposed portions exposed from the plurality of openings, the height of the plurality of exposed portions is measured by moving the measuring device linearly with respect to the electrode terminal. be able to. That is, the height of the plurality of exposed portions can be easily measured by a simple operation of moving the measuring device linearly with respect to the electrode terminal.
- the bus bar may have a surface on the electrode terminal side bonded to the surface of the electrode terminal.
- the bus bar and the electrode terminal can be firmly joined by joining the surface and the surface.
- the plurality of openings may be arranged outside the joint portion between the bus bar and the electrode terminal.
- the plurality of openings formed in the bus bar are arranged outside the joint portion between the bus bar and the electrode terminal, the plurality of openings are used as an obstacle to the joint between the bus bar and the electrode terminal. Can be arranged without.
- the surface of the electrode terminal is provided with a concave or convex portion that is a concave portion or a convex portion, and the plurality of openings are exposed to a portion different from the concave and convex portion of the surface of the electrode terminal. May be formed.
- the height of the portion different from the uneven portion is exposed. Can be measured. For this reason, even if the uneven part is formed on the surface of the electrode terminal, the height of the surface of the electrode terminal can be calculated without being affected by the uneven part.
- a method for inspecting a power storage device is a method for inspecting a power storage device including a power storage element, on a surface of an electrode terminal provided in the power storage element.
- the height of the surface of the electrode terminal is measured by measuring the height of the exposed portion on the surface of the electrode terminal exposed from the opening formed in the bus bar to be arranged.
- the height of the surface of the electrode terminal is measured by measuring the height of the exposed portion of the surface of the electrode terminal of the power storage element exposed from the opening formed in the bus bar. taking measurement. Accordingly, since the clearance between the electrode terminal and the bus bar can be inspected before or after the electrode terminal and the bus bar are bonded, it is possible to suppress the occurrence of a bonding failure in the bonding between the electrode terminal and the bus bar. it can.
- the height of the surface of the bus bar may be measured.
- the height of the surface of the plurality of exposed portions and the bus bar arranged in a straight line may be measured simultaneously.
- the height can be easily measured by simultaneously measuring the height of the plurality of exposed portions and the surface of the bus bar.
- the clearance between the electrode terminal and the bus bar is within an allowable range. It can be inspected.
- the height of the surface of the electrode terminal may be measured by measuring the height of three or more exposed portions.
- the height and inclination of the surface of the electrode terminal can be measured by measuring the height of three or more exposed portions in the electrode terminal, the clearance between the electrode terminal and the bus bar can be accurately measured. Can be inspected.
- FIG. 1 is a perspective view showing an external appearance of a power storage device 1 according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view showing each component when the power storage device 1 according to the embodiment of the present invention is disassembled.
- the Z-axis direction is shown as the vertical direction, and the Z-axis direction will be described below as the vertical direction. However, depending on the usage, the Z-axis direction may not be the vertical direction.
- the axial direction is not limited to the vertical direction.
- the power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside.
- the power storage device 1 is a battery module used for power storage use, power supply use, and the like.
- the power storage device 1 includes an exterior body 10 including a first exterior body 11 and a second exterior body 12, and an electrical storage unit 30 and an electric device 40 accommodated inside the exterior body 10. ing.
- the exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1 and is disposed outside the power storage unit 30 and the electric device 40. That is, the exterior body 10 arranges the power storage unit 30 and the electric device 40 at predetermined positions, and protects the power storage unit 30 and the electric device 40 from an impact or the like. Moreover, the exterior body 10 is comprised, for example with insulating resin, such as a polycarbonate and a polypropylene (PP), and avoids that the electrical storage unit 30 and the electric equipment 40 contact an external metal member.
- insulating resin such as a polycarbonate and a polypropylene (PP)
- the exterior body 10 includes a first exterior body 11 that constitutes a lid body of the exterior body 10 and a second exterior body 12 that constitutes the main body of the exterior body 10.
- the first exterior body 11 is a flat rectangular cover member that closes the opening of the second exterior body 12, and is provided with a positive external terminal 21 and a negative external terminal 22.
- the power storage device 1 charges electricity from the outside via the positive electrode external terminal 21 and the negative electrode external terminal 22, and discharges electricity to the outside.
- the second exterior body 12 is a bottomed rectangular cylindrical housing in which an opening is formed, and houses the power storage unit 30 and the electric device 40.
- 1st exterior body 11 and the 2nd exterior body 12 may be formed with the member of the same material, and may be formed with the member of a different material.
- the power storage unit 30 has a plurality of power storage elements and is connected to a positive external terminal 21 and a negative external terminal 22 provided on the first exterior body 11.
- the power storage unit 30 is stacked in the Z-axis direction and arranged in the second exterior body 12 with a plurality of power storage elements placed horizontally.
- the power storage unit 30 is accommodated inside the exterior body 10 by covering the first exterior body 11 from above. The detailed configuration of the power storage unit 30 will be described later.
- the electrical device 40 is a rectangular device in which a circuit board, a relay, and the like are disposed on the inside, and is disposed on the side of the power storage unit 30 (X-axis direction plus side).
- the electric device 40 is erected in the Z-axis direction with the circuit board placed vertically, and is disposed in the second exterior body 12.
- the electrical device 40 is accommodated inside the exterior body 10 by covering the first exterior body 11 from above.
- the circuit board provided in the electric device 40 is connected to the positive terminal or the negative terminal of each power storage element in the power storage unit 30 by wiring (lead wire).
- wiring lead wire
- the charge state or the discharge state (voltage) of the power storage element , Battery status such as temperature), etc., and monitor and control.
- FIG. 3 and 4 are perspective views showing the configuration of the power storage unit 30 according to the embodiment of the present invention. Specifically, FIG. 3 is an exploded perspective view showing a configuration when the bus bar frame 500 and the bus bar 600 are separated from the power storage unit 30. FIG. 4 is an exploded perspective view showing each component when the components separating the bus bar frame 500 and the bus bar 600 from the power storage unit 30 are further disassembled.
- the Y-axis direction is shown as the vertical direction, and there is a place where the Y-axis direction is described as the vertical direction.
- the Y-axis direction is not always the vertical direction.
- the power storage unit 30 includes a plurality of power storage elements 100 (eight power storage elements 100 in the present embodiment), a plurality of spacers 200 (seven spacers 200 in the present embodiment), and , A pair of clamping members 300, a plurality of restraining members 400 (four restraining members 410 to 440 in the present embodiment), a bus bar frame 500, and a plurality of bus bars 600 (in this embodiment, five bus bars 610). To 650).
- the power storage element 100 is a secondary battery (unit cell) that can charge and discharge electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. .
- the power storage element 100 has a flat rectangular shape and is disposed adjacent to the spacer 200. That is, each of the plurality of power storage elements 100 is alternately arranged with each of the plurality of spacers 200 and arranged in the Z-axis direction.
- the power storage element 100 is disposed laterally inside the outer package 10 (see FIG. 2). However, in FIG. It has shown in the state arrange
- the electrical storage element 100 is not limited to a nonaqueous electrolyte secondary battery, A secondary battery other than a nonaqueous electrolyte secondary battery may be sufficient, and a capacitor may be sufficient as it. The detailed configuration of the power storage device 100 will be described later.
- the spacer 200 is an insulating plate-like member that is disposed between two adjacent power storage elements 100 and formed of a resin or the like that insulates between the two power storage elements 100. In the present embodiment, seven spacers 200 are arranged between the eight power storage elements 100.
- the spacer 200 is formed of an insulating resin such as polycarbonate or polypropylene (PP), but may be formed of any material as long as it is a member having an insulating property.
- the spacer 200 is formed so as to cover approximately half of the front side or back side of the electricity storage element 100 (substantially half when divided into two in the Z-axis direction). That is, a recess is formed on both the front side or the back side (both sides in the Z-axis direction) of the spacer 200, and approximately half of the power storage element 100 is inserted into the recess. With such a configuration, the two spacers 200 sandwiching the power storage element 100 cover most of the power storage element 100, so that the insulating property between the power storage element 100 and another conductive member is covered by the spacer 200. Can be improved.
- the sandwiching member 300 is composed of a pair of plate-shaped members 310 and 320, and sandwiches and holds the plurality of power storage elements 100 from both sides in the arrangement direction (Z-axis direction) of the plurality of power storage elements 100.
- the clamping member 310 is a flat plate-like member that is disposed on the positive side in the Z-axis direction relative to the power storage element 100 that is disposed on the most positive side in the Z-axis direction among the plurality of power storage elements 100.
- the clamping member 320 is a flat plate-like member that is disposed on the minus side in the Z-axis direction with respect to the electricity storage element 100 that is disposed on the most minus side in the Z-axis direction among the plurality of power storage elements 100.
- the sandwiching member 310 and the sandwiching member 320 sandwich and hold the plurality of power storage elements 100 and the plurality of spacers 200 from both sides in the arrangement direction (Z-axis direction) of the plurality of power storage elements 100 and the plurality of spacers 200. .
- the sandwiching member 300 (the sandwiching members 310 and 320) is formed of a metal (conductive) member such as stainless steel or aluminum from the viewpoint of strength or the like.
- the insulating member is disposed to ensure insulation from the power storage element 100.
- the clamping member 300 is not limited to a metal (conductive) member, and may be formed of, for example, an insulating member having high strength.
- the sandwiching member 310 and the sandwiching member 320 may be formed of members of the same material, or may be formed of members of different materials.
- the restraint member 400 is a member that is attached to the sandwiching member 300 at both ends and restrains the plurality of power storage elements 100. That is, the restraining member 400 is disposed so as to straddle the plurality of power storage elements 100, and applies a restraining force in the arrangement direction (Z-axis direction) of the plurality of power storage elements to the plurality of power storage elements 100.
- the restraining member 400 is preferably formed of a metal member such as stainless steel or aluminum, for example, similarly to the clamping member 300, but may be formed of a member other than metal.
- the restraining member 400 has one end attached to the holding member 310 and the other end attached to the holding member 320. Then, the restraining member 400 applies a restraining force in the arrangement direction of the plurality of power storage elements 100 and the plurality of spacers 200 to the plurality of power storage elements 100 and the plurality of spacers 200.
- the restraint member 400 includes restraint members 410 to 440.
- the restraining members 410 and 420 are disposed on both sides of the plurality of power storage elements 100 in the vertical direction (both sides in the Y-axis direction), and sandwich and restrain the plurality of power storage elements 100 from both sides.
- the restraining members 430 and 440 are arranged on both sides (both sides in the X-axis direction) of the plurality of power storage elements 100, and sandwich and restrain the plurality of power storage elements 100 from both sides.
- the restraining member 410 and the restraining member 420 are a pair of long and flat members disposed on the plus side and the minus side in the Y-axis direction of the plurality of power storage elements 100.
- the restraining member 430 and the restraining member 440 are a pair of long and flat members disposed on the plus side and the minus side in the X-axis direction of the plurality of power storage elements 100.
- the bus bar frame 500 is a member that can insulate the bus bar 600 from other members, protect various wirings arranged in the power storage device 1, and restrict the position of the bus bar 600.
- the bus bar frame 500 positions the bus bar 600 with respect to the plurality of power storage elements 100.
- the bus bar frame 500 is placed above the plurality of power storage elements 100 (Y-axis direction plus side) and positioned with respect to the plurality of power storage elements 100.
- a bus bar 600 is placed on the bus bar frame 500.
- the protrusion of the bus bar frame 500 is inserted into the opening formed in the bus bar 600, whereby the bus bar 600 is positioned with respect to the bus bar frame 500.
- the bus bar 600 is positioned with respect to the plurality of power storage elements 100 and joined to the respective electrode terminals of the plurality of power storage elements 100.
- the bus bar frame 500 is formed of an insulating resin such as polycarbonate or polypropylene (PP), but may be formed of any material as long as it is an insulating member.
- insulating resin such as polycarbonate or polypropylene (PP)
- PP polypropylene
- the bus bar 600 is a bus bar that is electrically connected to each of the plurality of power storage elements 100. That is, the bus bar 600 is a conductive member that is electrically connected to each electrode terminal included in the plurality of power storage elements 100, and any one of the electrode terminals included in the plurality of power storage elements 100 is electrically connected to each other. To do. Specifically, the bus bar 600 is disposed on the surface of each electrode terminal included in the plurality of power storage elements 100 and connected (joined) to the electrode terminal.
- the bus bar 600 includes bus bars 610 to 650.
- Bus bars 610 to 630 are bus bars connected to the positive terminal and the negative terminal of different power storage elements 100 among the plurality of power storage elements 100.
- the bus bar 640 is a bus bar connected to the positive electrode terminal of any one of the plurality of power storage elements 100 and the positive external terminal 21 provided in the first exterior body 11.
- the bus bar 650 is a bus bar connected to the negative electrode terminal of any one of the plurality of power storage devices 100 and the negative external terminal 22 provided in the first exterior body 11.
- each of the bus bars 610 to 630 has one end connected to the positive terminals of the two power storage elements 100 and the other end connected to the negative electrodes of the other two power storage elements 100 different from the two power storage elements 100.
- the bus bar 640 has one end electrically connected to the positive terminals of the two storage elements 100 and the other end connected to the positive external terminal 21.
- the bus bar 650 has one end connected to the negative terminals of the two storage elements 100 and the other end electrically connected to the negative external terminal 22.
- the bus bar 600 (bus bars 610 to 650) is made of, for example, aluminum as a conductive member, but the material of the bus bar 600 is not particularly limited.
- the bus bars 610 to 650 may all be formed of the same material, or any of the bus bars may be formed of a different material.
- FIG. 5 is a perspective view showing the configuration of the energy storage device 100 according to the embodiment of the present invention. Specifically, this figure is a perspective view showing the inside of the electricity storage device 100 through the container 110 of the electricity storage device 100.
- the electricity storage device 100 includes a container 110, a positive electrode terminal 120, and a negative electrode terminal 130.
- an electrode body 140, a positive electrode current collector 150, and a negative electrode current collector 160 are disposed inside the container 110.
- liquids, such as electrolyte solution are enclosed in the inside of the container 110, illustration of the said liquid is abbreviate
- the container 110 is composed of a rectangular cylindrical body made of metal and having a bottom, and a metal lid that closes the opening of the body.
- the container 110 can seal the inside by welding the lid portion and the main body after the electrode body 140 and the like are accommodated therein.
- the electrode body 140 includes a positive electrode, a negative electrode, and a separator, and is a power generation element that can store electricity.
- the electrode body 140 is a wound electrode body formed by winding what is arranged in layers so that a separator is sandwiched between a positive electrode and a negative electrode.
- the electrode body 140 may be a laminated electrode body in which flat plate plates are laminated.
- the positive electrode is an electrode plate in which a positive electrode active material layer is formed on the surface of a long strip-like conductive positive electrode current collector foil made of aluminum or an aluminum alloy, and the negative electrode is made of copper or a copper alloy. It is an electrode plate in which a negative electrode active material layer is formed on the surface of a long strip-like conductive negative electrode current collector foil, and the separator is a microporous sheet.
- the positive electrode, the negative electrode, and the separator used for the energy storage device 100 are not particularly different from those conventionally used, and any known material can be used as long as the performance of the energy storage device 100 is not impaired.
- the electrolyte solution (nonaqueous electrolyte) sealed in the container 110 is not particularly limited as long as it does not impair the performance of the power storage device 100, and various types can be selected.
- the positive electrode current collector 150 is a member that is disposed between the positive electrode of the electrode body 140 and the side wall of the container 110 and has conductivity and rigidity that are electrically connected to the positive electrode terminal 120 and the positive electrode.
- the positive electrode current collector 150 is made of aluminum or an aluminum alloy as in the positive electrode current collector foil.
- the negative electrode current collector 160 is disposed between the negative electrode of the electrode body 140 and the side wall of the container 110, and has conductivity and rigidity that are electrically connected to the negative electrode terminal 130 and the negative electrode of the electrode body 140. It is a member.
- the negative electrode current collector 160 is made of copper or a copper alloy or the like, similarly to the negative electrode current collector foil.
- the positive electrode terminal 120 is an electrode terminal electrically connected to the positive electrode of the electrode body 140 via the positive electrode current collector 150
- the negative electrode terminal 130 is the negative electrode of the electrode body 140 via the negative electrode current collector 160.
- the electrode terminal is electrically connected to.
- the positive electrode terminal 120 and the negative electrode terminal 130 lead the electricity stored in the electrode body 140 to the external space of the power storage element 100, and also store the electricity in the internal space of the power storage element 100 in order to store the electricity in the electrode body 140.
- It is an electrode terminal made of metal for introducing.
- the positive terminal 120 and the negative terminal 130 are made of aluminum or an aluminum alloy.
- the negative electrode current collector 160 is formed of copper or a copper alloy having a different material from the negative electrode terminal 130, the negative electrode terminal 130 and the negative electrode current collector 160 are formed of copper or a copper alloy or the like. They are connected via rivets 170.
- the rivet 170 is a member for connecting (fixing) the negative electrode terminal 130 and the negative electrode current collector 160 to the lid plate of the container 110 while connecting the negative electrode terminal 130 and the negative electrode current collector 160.
- the negative electrode terminal 130 has a configuration in which the rivet surface 171 which is the upper surface (surface on the Y axis direction plus side) of the rivet 170 is exposed from the negative electrode terminal surface 131 which is the upper surface (surface on the Y axis direction plus side). ing. That is, by arranging the rivet 170 so as to be exposed from the negative electrode terminal surface 131, a concave or convex portion that is a concave portion or a convex portion is formed on the surface of the negative electrode terminal 130. In the present embodiment, the rivet surface 171 is formed so as not to protrude from the negative electrode terminal surface 131, and the uneven portion has a recessed shape.
- the positive electrode current collector 150 is formed of the same material as the positive electrode terminal 120, the positive electrode terminal 120 has a shape in which rivets having the same function as the rivet 170 are integrated. For this reason, the rivet is not exposed from the positive electrode terminal surface 121 which is the upper surface of the positive electrode terminal 120 (the surface on the Y axis direction plus side), and the positive electrode terminal surface 121 is a flat surface.
- bus bars 610 to 650 the configuration of the bus bar 600 (bus bars 610 to 650) will be described in detail. Since the bus bars 610 to 630 have the same configuration, the configuration of the bus bar 610 will be described in detail below, and the description of the configuration of the bus bars 620 and 630 is simplified or omitted. Further, the bus bars 640 and 650 have the same configuration as that of a part of the bus bar 610, and thus the description thereof is simplified or omitted.
- FIG. 6 is a perspective view showing the configuration of the bus bar 610 according to the embodiment of the present invention.
- FIG. 7 is a plan view showing the configuration of the bus bar 610 according to the embodiment of the present invention. Specifically, FIG. 7 is a plan view showing a configuration when the bus bar 610 is viewed from the Y axis direction plus side.
- the bus bar 610 includes a plurality of terminal connection portions (four terminal connection portions 611 to 614 in this embodiment) and a plurality of parallel connection portions (two parallel connections in this embodiment). Connection portions 615 and 616) and a series connection portion 617.
- the terminal connection portions 611 to 614 are connection portions connected to the electrode terminals (the positive electrode terminal 120 or the negative electrode terminal 130) included in each of the plurality of power storage elements 100, and are rectangular and flat plate portions. Specifically, the terminal connection portions 611 to 614 are plate-like portions extending on the XZ plane, and are arranged in the Z-axis direction.
- openings 611a to 611d are formed as a plurality of openings. Openings 611 a to 611 d are notches (recesses) formed in the outer edge portion of terminal connection portion 611, and are formed so that the surface of the electrode terminal of power storage element 100 is exposed.
- the exposure of the surface of the electrode terminal from the opening means that the opening is formed at a position close to the surface of the electrode terminal and from the outside of the opening (and the direction perpendicular to the surface of the electrode terminal). When viewed, the surface of the electrode terminal is visible from the opening.
- the opening 611a is a substantially rectangular notch formed at the end of the terminal connecting portion 611 on the minus side in the X-axis direction and on the minus side in the Z-axis direction.
- the opening 611b is a substantially semicircular cutout formed in the outer edge portion of the terminal connecting portion 611 on the minus side in the X-axis direction and on the plus side in the Z-axis direction.
- the opening 611c is a substantially rectangular notch formed at the end of the terminal connecting portion 611 on the X axis direction plus side and the Z axis direction minus side.
- the opening 611d is a substantially semicircular cutout formed in the outer edge portion of the terminal connection portion 611 on the X axis direction plus side and the Z axis direction plus side.
- the terminal connection portion 612 has four openings 612a to 612d as a plurality of openings. Openings 612a to 612d are notches (recesses) formed in the outer edge portion of terminal connection portion 612, and are formed so that the surface of the electrode terminal of power storage element 100 is exposed.
- the opening 612a is a substantially semicircular cutout formed in the outer edge portion of the terminal connection portion 612 on the minus side in the X-axis direction and on the minus side in the Z-axis direction.
- the opening 612b is a substantially semicircular cutout formed in the outer edge portion of the terminal connection portion 612 on the minus side in the X-axis direction and on the plus side in the Z-axis direction.
- the opening 612c is a substantially semicircular cutout formed in the outer edge portion of the terminal connecting portion 612 on the X axis direction plus side and the Z axis direction minus side.
- the opening 612d is a substantially semicircular cutout formed in the outer edge portion of the terminal connecting portion 612 on the plus side in the X-axis direction and on the plus side in the Z-axis direction.
- the terminal connection portion 613 has three openings 613a to 613c as a plurality of openings.
- the openings 613a and 613b are notches (concave portions) formed in the outer edge portion of the terminal connection portion 613, and the opening 613c is a through hole formed in the terminal connection portion 613. It is formed so that the surface of the electrode terminal is exposed.
- the opening 613a is a substantially semicircular cutout formed in the outer edge portion of the terminal connection portion 613 on the minus side in the X-axis direction and on the minus side in the Z-axis direction.
- the opening 613b is a substantially semicircular cutout formed in the outer edge portion of the terminal connecting portion 613 on the minus side in the X-axis direction and on the plus side in the Z-axis direction.
- the opening 613c is a circular through-hole that is formed on the X-axis direction plus side of the terminal connection portion 613 and at the center portion in the Z-axis direction and penetrates the terminal connection portion 613 in the Y-axis direction.
- a wiring connection portion 613d for connecting a state monitoring wiring such as the voltage of the bus bar 610 is formed at the end of the terminal connection portion 613 on the plus side in the X-axis direction. For this reason, on the plus side in the X-axis direction of the terminal connection portion 613, an opening 613c that is a through hole is formed instead of a notch.
- the wiring connection part 613d may not be formed in the terminal connection part 613, and the structure which the notch is formed also in the X-axis direction plus side of the terminal connection part 613 may be sufficient.
- the terminal connection portion 614 has four openings 614a to 614d as a plurality of openings. Openings 614 a to 614 d are notches (recesses) formed in the outer edge portion of terminal connection portion 614, and are formed so that the surface of the electrode terminal of power storage element 100 is exposed.
- the opening 614a is a substantially semicircular cutout formed in the outer edge portion of the terminal connecting portion 614 on the minus side in the X-axis direction and on the minus side in the Z-axis direction.
- the opening 614b is a substantially rectangular cutout formed at the end of the terminal connecting portion 614 on the minus side in the X-axis direction and on the plus side in the Z-axis direction.
- the opening 614c is a substantially semicircular cutout formed in the outer edge portion of the terminal connection portion 614 on the X axis direction plus side and the Z axis direction minus side.
- the opening 614d is a substantially rectangular notch formed at the end of the terminal connecting portion 614 on the plus side in the X-axis direction and on the plus side in the Z-axis direction.
- the plurality of openings 611a, 611b, 612a, 612b, 613a, 613b, 614a, and 614b are formed so as to be linearly arranged in the direction in which the terminal connection portions 611 to 614 are arranged.
- the plurality of openings 611c, 611d, 612c, 612d, 613c, 614c, and 614d are formed so as to be linearly arranged in the direction in which the terminal connection portions 611 to 614 are arranged.
- the shapes of the openings 611a to 611d, 612a to 612d, 613a to 613c, and 614a to 614d are not limited to those described above, and may be any shape.
- the size of the opening of the opening is not particularly limited, but is preferably a minimum size capable of measuring the height of an exposed portion of an electrode terminal of a power storage element 100 described below that is exposed from the opening.
- the parallel connection parts 615 and 616 are arranged between the terminal connection parts 611 to 614, and are curved plate-shaped parts formed by protruding and bending in the Y axis direction plus side. Specifically, the parallel connection portion 615 is a portion disposed between the terminal connection portions 611 and 612, and the parallel connection portion 616 is a portion disposed between the terminal connection portions 613 and 614. .
- the serial connection portion 617 is a portion disposed between the terminal connection portions 612 and 613, and is a curved plate-shaped portion formed by protruding and bending in the Y axis direction plus side.
- the series connection part 617 has the same external shape as the terminal connection parts 613 and 614.
- the terminal connection portions 611 to 614, the parallel connection portions 615 and 616, and the series connection portion 617 are arranged so as to be linearly arranged in the Z-axis direction.
- each of the parallel connection portions 615 and 616 is formed with a plurality of openings.
- the parallel connection portion 615 is formed with two openings 615a and 615b arranged in the X-axis direction.
- the parallel connection portion 616 also has two openings 616a and 616b arranged in the X-axis direction.
- the openings 615a and 615b are circular through holes that penetrate the parallel connection portion 615 in the Y-axis direction
- the openings 616a and 616b are circular through-holes that penetrate the parallel connection portion 616 in the Y-axis direction. is there.
- the shape of the openings 615a, 615b, 616a, and 616b may not be circular but may be rectangular. Further, the openings 615a, 615b, 616a, and 616b do not have to be through holes, and may be notches (concave portions) formed on the outer edges of the parallel connection portions 615 or 616.
- bus bar frame 500 Next, the configuration of the bus bar frame 500 will be described in detail.
- FIG. 8 is a perspective view showing the configuration of the bus bar frame 500 according to the embodiment of the present invention.
- FIG. 9 is a perspective view showing a configuration in a state where bus bars 600 (bus bars 610, 640 and 650) are arranged on bus bar frame 500 according to the embodiment of the present invention.
- the bus bar frame 500 has a rectangular and flat bus bar frame main body 510.
- the bus bar frame main body 510 is a part constituting the main body of the bus bar frame 500.
- the bus bar frame main body 510 has eight support portions 511 to 518 on which the bus bar 600 is placed and supports the bus bar 600.
- the support portions 511 to 518 are long (bar-shaped) portions, and the bus bars 610 to 650 are placed and supported. Specifically, the support portions 511 to 514 are arranged in the Z-axis direction on the plus side portion of the bus bar frame main body 510 in order from the Z-axis direction minus side. Further, the support portions 515 to 518 are arranged in order from the minus side in the Z-axis direction along the Z-axis direction at a portion on the minus side in the X-axis direction of the bus bar frame main body 510.
- the support portion 511 supports the bus bar 640
- the support portions 512 and 513 support the bus bar 610
- the support portion 514 supports the bus bar 650.
- the support portions 515 and 516 support the bus bar 620
- the support portions 517 and 518 support the bus bar 630.
- each of the support portions 511 to 518 has two protrusions for positioning the bus bars 610 to 650 with respect to the plurality of power storage elements 100.
- the support portions 511 to 518 have protrusions 521 to 528, and the protrusions 521 to 528 are arranged in the openings formed in the bus bars 610 to 650, whereby a plurality of bus bars 610 to 650 are provided. It positions with respect to the electrical storage element 100 of.
- the protrusions 522 and 523 of the bus bar frame 500 are in the openings 615 a, 615 b, 616 a, and 616 b formed in the parallel connection portions 615 and 616 of the bus bar 610.
- the bus bar 610 is arranged on the bus bar frame 500.
- the support portions 512 and 513 of the bus bar frame 500 are arranged in the curved recesses of the parallel connection portions 615 and 616, so that the parallel connection portion 615 and the support portions 512 and 513 of the bus bar frame 500 are arranged. 616 is arranged. At this time, the protrusions 522 and 523 of the bus bar frame 500 are inserted into the openings 615a, 615b, 616a and 616b of the bus bar 610. As a result, the bus bar 610 is positioned on the bus bar frame 500, and thus is positioned with respect to the plurality of power storage elements 100. The same applies to other bus bars.
- FIGS. 10 to 12 show the state where the bus bar 600 is positioned and arranged with respect to the plurality of power storage elements 100 in this way.
- FIG. 10 is a perspective view showing a configuration in a state where bus bar 600 (bus bars 610 to 650) is arranged on a plurality of power storage elements 100 (power storage elements 101 to 108) according to the embodiment of the present invention.
- FIG. 11 is a plan view showing a configuration in a state where bus bar 610 is arranged on a plurality of power storage elements 100 (power storage elements 103 to 106) according to the embodiment of the present invention.
- FIG. 12 is a plan view showing a configuration in a state where bus bar 610 is arranged and joined onto a plurality of power storage elements 100 (power storage elements 103 to 106) according to the embodiment of the present invention.
- the terminal connection portions 612 and 613 of the bus bar 610 are omitted, and only the terminal connection portions 611 and 614 are illustrated.
- bus bar frame 500 is omitted, and a configuration in which the bus bar 600 is arranged on the power storage element 100 is shown.
- eight power storage elements 100 arranged in the Z-axis direction are shown as power storage elements 101 to 108 in order from the negative side in the Z-axis direction.
- only the bus bar 610 is illustrated, or only the bus bar 610 is illustrated, but the other bus bars are the same as the bus bar 610.
- terminal connection portion 611 is connected to the negative electrode terminal 130 of the energy storage device 103, and the terminal connection portion 612 is connected to the negative electrode terminal 130 of the energy storage device 104.
- terminal connection portion 613 is connected to positive electrode terminal 120 of power storage element 105, and terminal connection portion 614 is connected to positive electrode terminal 120 of power storage element 106.
- the terminal connection portion 611 is placed on the negative electrode terminal surface 131 so as to cover substantially the entire surface of the negative electrode terminal surface 131 of the negative electrode terminal 130 of the power storage element 103, and is formed on the lower surface (surface on the negative side in the Y-axis direction). ) Is bonded to the negative electrode terminal surface 131.
- the terminal connection portion 612 is placed on the negative electrode terminal surface 131 so as to cover almost the entire surface of the negative electrode terminal surface 131 of the negative electrode terminal 130 of the power storage element 104, and the lower surface (the surface on the negative side in the Y-axis direction) is a negative electrode. Bonded to the terminal surface 131.
- the terminal connection portion 613 is placed on the positive electrode terminal surface 121 so as to cover almost the entire surface of the positive electrode terminal surface 121 of the positive electrode terminal 120 of the power storage element 105, and the lower surface (surface on the negative side in the Y-axis direction) is the positive electrode. Bonded to the terminal surface 121. Further, the terminal connection portion 614 is placed on the positive electrode terminal surface 121 so as to cover almost the entire surface of the positive electrode terminal surface 121 of the positive electrode terminal 120 of the power storage element 106, and the lower surface (surface on the negative side in the Y-axis direction) is the positive electrode. Bonded to the terminal surface 121.
- the power storage element 103 and the power storage element 104 are connected in parallel, and the power storage element 105 and the power storage element 106 are also connected in parallel.
- the power storage element 103 and the power storage element 104, and the power storage element 105 and the power storage element 106 are connected in series.
- the plurality of openings formed in the terminal connection portion of the bus bar 610 are formed so that the surface of the electrode terminal of the power storage element 100 is exposed. Specifically, the plurality of openings are formed so that the outer peripheral portion of the surface of the electrode terminal is exposed.
- the openings 611a to 611d formed in the terminal connection portion 611 are formed so that the exposed portions 131a to 131d in the outer peripheral portion of the negative electrode terminal surface 131 of the negative electrode terminal 130 of the power storage element 103 are exposed.
- the openings 612a to 612d formed in the terminal connection portion 612 are formed so that the exposed portions 132a to 132d in the outer peripheral portion of the negative electrode terminal surface 131 of the negative electrode terminal 130 of the power storage element 104 are exposed.
- the openings 613a to 613c formed in the terminal connection portion 613 are formed so that the exposed portions 121a to 121c in the outer peripheral portion of the positive electrode terminal surface 121 of the positive electrode terminal 120 of the power storage element 105 are exposed.
- the openings 614 a to 614 d formed in the terminal connection portion 614 are formed so that the exposed portions 122 a to 122 d in the outer peripheral portion of the positive electrode terminal surface 121 of the positive electrode terminal 120 of the power storage element 106 are exposed.
- the bus bar 610 is placed on the electrode terminal so as to cover almost the entire surface of the electrode terminal in order to ensure a large contact area with the electrode terminal of the power storage element 100, but from the opening portion. A part of the electrode terminal surface is exposed.
- the bus bar 610 has, for each electrode terminal included in the plurality of power storage elements 100, three or more openings formed so that the surface of the electrode terminal is exposed.
- the three or more openings are formed so that the exposed portions of the surface of the electrode terminal are not arranged linearly. That is, since the three or more openings are formed so as not to be arranged linearly, the exposed portions are not arranged linearly.
- the openings 611a to 611d are formed at the four corners of the terminal connection portion 611 so that the exposed portions 131a to 131d are not arranged in a straight line.
- the plurality of openings formed in the terminal connection portion of the bus bar 610 are formed so that exposed portions of the surface of the electrode terminal of the power storage element 100 are arranged in a straight line. That is, the plurality of openings are formed so that the exposed portions are arranged in a plurality of (two in the present embodiment) linear shapes.
- the openings 611a, 611b, 612a, 612b, 613a, 613b, 614a, and 614b are formed so that the exposed portions 131a, 131b, 132a, 132b, 121a, 121b, 122a, and 122b are arranged linearly.
- the openings 611c, 611d, 612c, 612d, 613c, 614c and 614d are formed such that the exposed portions 131c, 131d, 132c, 132d, 121c, 122c and 122d are arranged in a straight line.
- the plurality of openings formed in the terminal connecting portions of the bus bars 640, 610 and 650 are formed so that exposed portions of the surface of the electrode terminals are arranged in a straight line.
- the plurality of openings formed in the terminal connection portions of the bus bars 620 and 630 are also formed so that exposed portions of the surface of the electrode terminal of the power storage element 100 are arranged in a straight line.
- terminal connection portions 611 to 614 of the bus bar 610 are joined to the respective electrode terminals by laser welding or the like.
- the plurality of openings formed in the terminal connection portions 611 to 614 are arranged outside the joint portion between the bus bar 610 and the electrode terminal.
- the bus bar 610 has a surface on the electrode terminal side joined to the surface of the electrode terminal.
- the openings 611a to 611d formed in the terminal connection portion 611 are disposed outside the joint portions 611e and 611f, which are joint portions between the bus bar 610 and the negative electrode terminal 130 of the power storage element 103. That is, the openings 611a and 611b are disposed on the minus side in the X-axis direction of the joint 611e, and the openings 611c and 611d are disposed on the plus side in the X-axis direction of the joint 611f.
- the joint portions 611e and 611f are portions where the terminal connection portion 611 of the bus bar 610 is joined to the negative electrode terminal 130 of the power storage element 103. That is, the surface of the terminal connection portion 611 on the negative electrode terminal 130 side is exposed to laser light (laser welding) by irradiating the joint portions 611e and 611f of the terminal connection portion 611 with laser light. Bonded to the terminal surface 131.
- the openings 614a to 614d formed in the terminal connection portion 614 are disposed outside the joint portions 614e and 614f, which are joint portions between the bus bar 610 and the positive electrode terminal 120 of the power storage element 106. That is, the openings 614a and 614b are disposed on the minus side in the X-axis direction of the joint 614e, and the openings 614c and 614d are disposed on the plus side in the X-axis direction of the joint 614f. Then, the surface of the terminal connection portion 614 on the positive electrode terminal 120 side is bonded to the positive electrode terminal surface 121 of the positive electrode terminal 120, for example, by laser welding at the bonding portions 614e and 614f of the terminal connection portion 614. The same applies to the terminal connection portions 612 and 613.
- the plurality of openings formed in the terminal connection portions 611 to 614 are formed so that portions different from the uneven portions on the surface of the electrode terminal are exposed.
- the openings 611a to 611d formed in the terminal connection portion 611 are exposed so that portions different from the uneven portions (portions where the rivets 170 are exposed) of the negative electrode terminal surface 131 of the negative electrode terminal 130 of the power storage element 103 are exposed. Is formed. The same applies to the terminal connection portion 612.
- the terminal connection portions 613 and 614 do not have the above-described configuration because the uneven portion is not formed on the positive electrode terminal surface 121, but when the uneven portion is formed on the positive electrode terminal surface 121, The plurality of openings are formed such that portions of the positive electrode terminal surface 121 that are different from the concavo-convex portions are exposed.
- FIG. 13 is a flowchart illustrating an inspection method for power storage device 1 according to the embodiment of the present invention.
- 14 and 15 are diagrams for explaining an inspection method for power storage device 1 according to the embodiment of the present invention.
- FIG. 14 is a plan view showing a configuration in a state where the bus bar 600 is disposed on the electrode terminal of the power storage element 100. That is, this figure is a top view when FIG. 10 is viewed from above (Y axis direction plus side).
- FIG. 15 is a cross-sectional view when the bus bar 600 is disposed on the electrode terminal of the power storage element 100 and is cut at the position of the opening formed in the terminal connection portion of the bus bar 600.
- this figure is a diagram for explaining the measurement of the height of the electrode terminal of power storage element 100 and the surface of bus bar 600 using measurement device 2.
- components other than the bus bar 600 and the power storage element 100 such as the bus bar frame 500 are omitted.
- the height of the exposed portion on the surface of the electrode terminal of the storage element 100 and the height of the surface of the bus bar 600 are measured (S102).
- the height of the exposed portion and the height of the surface of the bus bar 600 are measured. That is, for example, in the row L1, among the exposed portions of the surface of the electrode terminal exposed from the plurality of openings of the bus bars 640, 610, and 650, the height of each of the plurality of exposed portions arranged linearly, and Then, the height of the surface of the bus bar 600 that is collinear with the exposed portion is measured.
- the measurement device irradiates light (for example, laser light) all at once on the surfaces of the plurality of exposed portions and the bus bar 600 arranged in a straight line, so that the linear arrangement is made.
- a plurality of the exposed portions and the height of the surface of the bus bar 600 are simultaneously measured. That is, in the row L1, the heights of the exposed portions and the surface of the bus bar 600 are simultaneously measured, and then the heights of the exposed portions and the surface of the bus bar 600 are simultaneously measured in the order of rows L2, L3, and L4. Measure.
- the measuring device by moving the measuring device four times, the height of the exposed portions of the electrode terminals of all the power storage elements 100 included in the power storage device 1 and the height of the surface of the bus bar 600 can be measured. it can.
- FIG. 15 shows an example of the height measurement in which the bus bar 610 shown in FIG. 14 is placed on the electrode terminals of the power storage elements 103 to 106 and the surface height of the electrode terminals and the bus bar 610 is measured by the measuring device 2. It is a figure explaining measuring thickness.
- the measuring device 2 is arranged in parallel with the bus bar 610 at a certain distance from the bus bar 610. Note that, as described above, the measuring device 2 measures the plurality of exposed portions in, for example, the row L1 shown in FIG. 14 and the height of the surface of the bus bar 600 at the same time. Over 650, the bus bars 640, 610 and 650 are arranged in parallel with a certain distance.
- a laser displacement sensor Keyence 2D laser displacement sensor or the like
- the laser displacement sensor is a sensor that irradiates a measurement object with laser light and measures the amount of displacement from the reference position to the measurement object. By using a two-dimensional laser displacement sensor, a surface having a predetermined width on the measurement object. The shape can be measured.
- the measuring apparatus 2 measures the heights of the points P11 to P14, points P21 to P24, points P31, P32, and points P41 to P44 shown in FIG. 15 at the same time.
- point P11, point P14, point P21, point P24, point P32, point P41 and point P44 are measurement points on the exposed portion of the surface of negative electrode terminal 130 or positive electrode terminal 120 of power storage elements 103 to 106
- Point P 12, point P 13, point P 22, point P 23, point P 31, point P 42 and point P 43 are measurement points on the surface of bus bar 610.
- the measuring device 2 measures the height h11 from the reference plane as the height at the point P11.
- the measuring apparatus 2 measures the heights h12 to h14 from the reference plane as the heights at the points P12 to P14.
- the position of the reference plane is not particularly limited.
- the measuring device 2 measures the heights of the plurality of exposed portions on the surfaces of the electrode terminals of all the power storage elements 100 included in the power storage device 1 and the height of the surface of the bus bar 600. Note that the measuring device 2 measures a plurality of locations at the same time, but this simultaneous means the same timing, and it is not necessary that the measurement times at the plurality of locations coincide completely, and a slight time lag is allowed. . Moreover, the range in which the measuring device 2 can measure at one time is not limited to the above, and the height of the surface of the exposed portion formed in a straight line and the bus bar 600 is divided into a plurality of times. May be. Further, the measuring device 2 may be configured to measure with an infrared sensor or a measuring pin.
- the difference between the height h11 of the surface of the electrode terminal of the electricity storage device 100 shown in FIG. 15 and the height h12 of the surface of the bus bar 600 is within a predetermined range.
- the predetermined range for example, when the thickness of the bus bar 600 is t, it is within a range of about t ⁇ 0.1 mm (that is, within a range of t ⁇ 0.1 mm or more and t + 0.1 mm or less). is there.
- a value obtained by subtracting the height h11 and the thickness t of the bus bar 600 from the height h12 is within a specified range (for example, about ⁇ 0.1 mm, that is, a range of ⁇ 0.1 mm to 0.1 mm). In). That is, the value obtained by subtracting the height h11 and the plate thickness t from the height h12 should theoretically be “0”, but the processing accuracy of the bus bar 600 and the measurement accuracy of the measuring device 2 are also taken into consideration. Then, it is determined whether or not the value is close to 0.
- the difference between the height h14 and the height h13 is within a predetermined range, that is, a value obtained by subtracting the height h14 and the plate thickness t from the height h13.
- a predetermined range that is, a value obtained by subtracting the height h14 and the plate thickness t from the height h13.
- the value of the specified range is not particularly limited. For example, it is a numerical value other than 0.1 mm, ⁇ several% of the plate thickness t, or only an upper limit value or only a lower limit value is determined by the user. It is determined appropriately.
- the height of the surface of the electrode terminal is calculated using the heights of the plurality of exposed portions on the surface of the electrode terminal measured by the measuring device 2. That is, by measuring the height of three or more exposed portions for one electrode terminal, the height of the surface of the electrode terminal is measured. Specifically, by measuring the height of three or more exposed portions that are not collinear with respect to one electrode terminal (that is, arranged so as not to be arranged linearly) using the measuring device 2, The height and inclination (surface flatness) of the surface of the electrode terminal of the storage element 100 are calculated.
- the height and inclination (surface of each bus bar) are measured by measuring the height of a plurality of locations (three or more positions arranged so as not to be arranged in a straight line) for one bus bar. Of flatness).
- the height and inclination can be calculated more accurately by using three or more measurement points. You may decide to calculate the said height and inclination using a point.
- the power storage device 1 includes the bus bar 600 disposed on the surface of the electrode terminal of the power storage element 100 and connected to the electrode terminal. Has a plurality of openings formed so that the surface of the electrode terminal is exposed. That is, since the surface of the electrode terminal of the electricity storage element 100 is exposed from a plurality of openings formed in the bus bar 600, the height of the exposed portion of the surface of the electrode terminal is measured, so that the electrode terminal and the bus bar are measured. A clearance between 600 can be measured. For this reason, according to the electrical storage device 1, the electrode terminal and the bus bar 600 can be joined while monitoring the clearance between the electrode terminal of the electrical storage element 100 and the bus bar 600. It is possible to suppress the occurrence of poor bonding in.
- the bus bar 600 has three or more openings formed so that the surface of the electrode terminal is exposed for each electrode terminal. That is, since the three or more surface portions of the electrode terminal are exposed from the three or more openings, the height of the three or more exposed portions can be measured. For this reason, since the height and inclination of the surface of the electrode terminal can be calculated from the heights of the three or more exposed portions of the electrode terminal, the clearance between the electrode terminal and the bus bar 600 can be calculated. In addition, it is possible to suppress the occurrence of bonding failure in the bonding between the electrode terminal and the bus bar 600.
- the height of the three or more exposed portions that are not arranged linearly is used, The height and inclination of the surface of the electrode terminal can be accurately calculated. For this reason, the clearance between the electrode terminal and the bus bar 600 can be accurately calculated, and it is possible to suppress the occurrence of bonding failure in the bonding between the electrode terminal and the bus bar 600.
- the height of the outer peripheral portion of the surface of the electrode terminal can be measured.
- the height of the surface of the electrode terminal can be calculated from the height of the plurality of locations in the center portion of the surface of the electrode terminal, the height of the surface of the electrode terminal from the height of the plurality of locations in the outer peripheral portion of the surface of the electrode terminal. It is possible to calculate the accuracy more accurately. For this reason, since the height of the surface of the electrode terminal can be calculated from the height of the outer peripheral portion of the surface of the electrode terminal, the height of the surface of the electrode terminal can be calculated more accurately.
- the plurality of openings formed in the bus bar 600 are formed so that a portion different from the uneven portion of the surface of the electrode terminal is exposed, the height of the portion different from the uneven portion is measured. can do. For this reason, even if the uneven part is formed on the surface of the electrode terminal, the height of the surface of the electrode terminal can be calculated without being affected by the uneven part.
- a plurality of openings are formed in the bus bar 600 by forming notches in the outer edge portion of the bus bar 600.
- the bus bar 600 may be warped due to burrs or the like. For this reason, by forming a notch in the outer edge portion of the bus bar 600, it is possible to suppress the bus bar 600 from warping on the electrode terminal, and to prevent occurrence of poor bonding in the bonding between the electrode terminal and the bus bar 600. can do.
- the plurality of openings formed in the bus bar 600 are formed so that the exposed portions of the surface of the electrode terminal are arranged in a straight line. For this reason, when measuring the height of the plurality of exposed portions exposed from the plurality of openings, the height of the plurality of exposed portions is measured by moving the measuring device linearly with respect to the electrode terminal. be able to. That is, the height of the plurality of exposed portions can be easily measured by a simple operation of moving the measuring device linearly with respect to the electrode terminal.
- the bus bar 600 and the electrode terminal can be firmly joined by joining the surfaces.
- the plurality of openings formed in the bus bar 600 are arranged outside the joint portion between the bus bar 600 and the electrode terminal, the plurality of openings are used as an obstacle to the joint between the bus bar 600 and the electrode terminal. Can be arranged without.
- the heights of the plurality of exposed portions on the surface of the electrode terminal of power storage element 100 exposed from the plurality of openings formed in bus bar 600 is measured to measure the surface height of the electrode terminal.
- the height of the bus bar 600 and the height of the electrode terminal of the power storage element 100 can be compared. Therefore, the clearance between the electrode terminal and the bus bar 600 is inspected. be able to.
- the height of the surface of the electrode terminal and the height of the surface of the bus bar 600 can be easily measured. Can be measured.
- the clearance between the electrode terminal and the bus bar 600 is allowed. It can be checked whether it is within range.
- the height and inclination of the surface of the electrode terminal can be measured by measuring the height of three or more exposed portions of the electrode terminal of the energy storage device 100, the clearance between the electrode terminal and the bus bar 600 is measured. Can be accurately inspected.
- the plurality of openings (for example, the openings 611a to 611d) formed in the terminal connection portion of the bus bar 600 are notches (concave portions) formed in the outer edge portion.
- the plurality of openings formed in the terminal connection portion of the bus bar 600 are not limited to the notches, and may be through holes.
- the number of openings formed in the terminal connection portion of the bus bar 600 is not particularly limited. However, in order to measure the height of the plane of the bus bar 600, it is preferable that three or more openings are formed in the terminal connection portion of the bus bar 600.
- the plurality of openings formed in the terminal connection portion of the bus bar 600 are formed so that the outer peripheral portion of the surface of the electrode terminal of the power storage element 100 is exposed.
- the plurality of openings may be formed so that the central portion of the surface of the electrode terminal of the power storage element 100 is exposed. Even in this case, although the accuracy is lowered, the height of the electrode terminal can be measured.
- the several opening part formed in the terminal connection part of the bus-bar 600 is formed so that a part different from the uneven
- the plurality of openings formed in the terminal connection portion of the bus bar 600 are arranged outside the joint portion between the bus bar 600 and the electrode terminal of the storage element 100.
- the joint portion may be disposed outside the plurality of openings. This also allows the bus bar 600 to be joined to the electrode terminal.
- the present invention can be realized not only as an inspection method for the power storage device 1 as described above, but also as an inspection device including a processing unit that performs characteristic processing included in the inspection method for the power storage device 1. be able to.
- it can be realized as a program or an integrated circuit that causes a computer to execute characteristic processing included in the inspection method of the power storage device 1.
- the computer-readable non-transitory recording medium in which the program is recorded for example, a flexible disk, a hard disk, a CD-ROM, an MO, a DVD, a DVD-ROM, a DVD-RAM, a BD (Blu-ray (registered trademark) ) Disc), and can be realized as a semiconductor memory.
- Such a program can be distributed via a recording medium such as a CD-ROM and a transmission medium such as the Internet.
- the present invention can be realized not only as such a power storage device 1 but also as a bus bar 600 provided in the power storage device 1.
- the present invention can be applied to a power storage device including a power storage element.
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Abstract
Description
まず、蓄電装置1の構成について、説明する。
2 測定装置
10 外装体
11 第一外装体
12 第二外装体
21 正極外部端子
22 負極外部端子
30 蓄電ユニット
40 電気機器
100、101、102、103、104、105、106、107、108 蓄電素子
110 容器
120 正極端子
121 正極端子表面
121a~121c、122a~122d、131a~131d、132a~132d 露出部
130 負極端子
131 負極端子表面
140 電極体
150 正極集電体
160 負極集電体
170 リベット
171 リベット表面
200 スペーサ
300、310、320 挟持部材
400、410、420、430、440 拘束部材
500 バスバーフレーム
510 バスバーフレーム本体部
511、512、513、514、515、516、517、518 支持部
521、522、523、524、525、526、527、528 突起部
600、610、620、630、640、650 バスバー
611、612、613、614 端子接続部
611a~611d、612a~612d、613a~613c、614a~614d、615a、615b、616a、616b 開口部
611e、611f、614e、614f 接合部
613d 配線接続部
615、616 並列接続部
617 直列接続部
Claims (13)
- 蓄電素子を備える蓄電装置であって、
前記蓄電素子に設けられる電極端子と、
前記電極端子の表面上に配置され、前記電極端子に接続されるバスバーとを備え、
前記バスバーは、前記電極端子の表面が露出するように形成される複数の開口部を有する
蓄電装置。 - 前記蓄電装置は、電極端子をそれぞれ有する蓄電素子を複数備え、
前記バスバーは、前記複数の蓄電素子が有する電極端子それぞれについて、前記電極端子の表面が露出するように形成される3以上の開口部を有する
請求項1に記載の蓄電装置。 - 前記3以上の開口部は、前記電極端子の表面の露出部分が直線状に配列しないように形成される
請求項2に記載の蓄電装置。 - 前記複数の開口部は、前記電極端子の表面の外周部分が露出するように形成される
請求項1~3のいずれか1項に記載の蓄電装置。 - 前記複数の開口部は、前記バスバーの外縁部分に形成された切り欠きである
請求項1~4のいずれか1項に記載の蓄電装置。 - 前記複数の開口部は、前記電極端子の表面の露出部分が直線状に配列するように形成される
請求項1~5のいずれか1項に記載の蓄電装置。 - 前記複数の開口部は、前記バスバーと前記電極端子との接合部分の外方に配置される
請求項1~6のいずれか1項に記載の蓄電装置。 - 前記電極端子の表面には、凹部または凸部である凹凸部が形成されており、
前記複数の開口部は、前記電極端子の表面のうちの前記凹凸部とは異なる部分が露出するように形成される
請求項1~7のいずれか1項に記載の蓄電装置。 - 蓄電素子を備える蓄電装置の検査方法であって、
前記蓄電素子に設けられた電極端子の表面上に配置されるバスバーに形成された開口部から露出した、前記電極端子の表面における露出部分の高さを測定することで、前記電極端子の表面の高さを測定する
蓄電装置の検査方法。 - さらに、前記バスバーの表面の高さを測定する
請求項9に記載の蓄電装置の検査方法。 - 前記露出部分及び前記バスバーの表面の高さの測定において、直線状に配列された複数の前記露出部分及び前記バスバーの表面の高さを同時に測定する
請求項10に記載の蓄電装置の検査方法。 - さらに、前記露出部分の高さと前記バスバーの表面の高さとの差が、所定範囲内にあるか否かを判定する
請求項10または11に記載の蓄電装置の検査方法。 - 前記露出部分の高さの測定において、3以上の前記露出部分の高さを測定することで、前記電極端子の表面の高さを測定する
請求項9~12のいずれか1項に記載の蓄電装置の検査方法。
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DE112015004047.1T DE112015004047T5 (de) | 2014-09-04 | 2015-09-02 | Energiespeichervorrichtung und Prüfverfahren für Energie-Speichervorrichtung |
CN201580046918.2A CN106605316B (zh) | 2014-09-04 | 2015-09-02 | 蓄电装置 |
JP2016546323A JP6627764B2 (ja) | 2014-09-04 | 2015-09-02 | 蓄電装置 |
US15/504,641 US10333128B2 (en) | 2014-09-04 | 2015-09-02 | Energy storage apparatus and energy storage apparatus checking method |
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JP (1) | JP6627764B2 (ja) |
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CN108321420A (zh) * | 2017-01-16 | 2018-07-24 | 株式会社杰士汤浅国际 | 蓄电装置的制造方法、蓄电元件以及蓄电装置 |
JP2018116926A (ja) * | 2017-01-16 | 2018-07-26 | 株式会社Gsユアサ | 蓄電装置の製造方法、蓄電素子、及び蓄電装置 |
WO2021199488A1 (ja) * | 2020-03-31 | 2021-10-07 | 三洋電機株式会社 | 電源装置及びこれを備える車両並びに蓄電装置 |
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US20170237057A1 (en) | 2017-08-17 |
CN106605316B (zh) | 2020-05-01 |
CN106605316A (zh) | 2017-04-26 |
JPWO2016035334A1 (ja) | 2017-07-13 |
DE112015004047T5 (de) | 2017-07-13 |
US10333128B2 (en) | 2019-06-25 |
JP6627764B2 (ja) | 2020-01-08 |
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