WO2012132618A1 - Terminal-equipped electrochemical device - Google Patents

Terminal-equipped electrochemical device Download PDF

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Publication number
WO2012132618A1
WO2012132618A1 PCT/JP2012/053899 JP2012053899W WO2012132618A1 WO 2012132618 A1 WO2012132618 A1 WO 2012132618A1 JP 2012053899 W JP2012053899 W JP 2012053899W WO 2012132618 A1 WO2012132618 A1 WO 2012132618A1
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WO
WIPO (PCT)
Prior art keywords
terminal
plating
tab terminal
electrochemical device
area
Prior art date
Application number
PCT/JP2012/053899
Other languages
French (fr)
Japanese (ja)
Inventor
児玉智興
山下哲哉
尾崎博寿
上山さなえ
Original Assignee
Ｆｄｋ鳥取株式会社
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Application filed by Ｆｄｋ鳥取株式会社 filed Critical Ｆｄｋ鳥取株式会社
Publication of WO2012132618A1 publication Critical patent/WO2012132618A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • 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
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • 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
    • H01M50/20—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341—Surface mounted components
    • H05K3/3421—Leaded components
    • H05K3/3426—Leaded components characterised by the leads
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/111—Pads for surface mounting, e.g. lay-out
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10037—Printed or non-printed battery
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to an electrochemical device with terminals which is surface-mounted on a circuit board by soldering.
  • Coin-type batteries have electrodes on both the front and back surfaces, and tab terminals with plating on the tips are usually joined to these electrodes.
  • Such a coin-type battery with a terminal is used in a state where it is joined to a land on a circuit board by reflow soldering (see, for example, Patent Document 1).
  • the tab terminal does not protrude greatly in the battery outer peripheral direction. More specifically, when a virtual rectangle circumscribing a coin-shaped battery having a circular shape is assumed, a design is adopted in which tab terminals are arranged in the region of the virtual rectangle.
  • the land area where the pair of lands are formed on the circuit board side is also designed to have a small area comparable to the virtual rectangle.
  • the present invention has been made in view of the above-mentioned problems, and its purpose is to prevent misalignment during solder reflow despite a small mounting area on a circuit board, and to provide high connection reliability at a solder joint. It is providing the electrochemical device with a terminal which can provide property.
  • An electrochemical device with terminals surface-mounted on a circuit board having a first land and a second land, which is on the opposite side of the first pole and the first pole disposed on the circuit board side A circular electrochemical device having a second pole; a first tab terminal joined to the first pole and soldered to the first land; and a first tab terminal at an end; and the second pole A second tab terminal that is joined and bent so that the end portion is located on the same plane as the first plating portion, and has a second plating portion that is soldered to the second land at the end portion.
  • the first tab terminal and the second tab terminal are disposed in a virtual rectangular region circumscribing the circular electrochemical device, and the second plating portion is one of four corners in the region.
  • the first plating part is the other 3
  • the ratio of the area of the first plating part to the area of the second plating part when viewed from the first pole side is 1.5 or more and 3.0 or less.
  • the device peripheral direction of these tab terminals is The degree of overhanging is reduced. Therefore, the mounting area on the circuit board of the electrochemical device with a terminal can be kept small. Moreover, about the 1st plating part and the 2nd plating part, as a result of employ
  • the first tab terminal has only one first plating part, and the first plating part has a rotation angle with respect to the center of the coin-type battery, and the second plating part has The terminal-attached electrochemical device according to means 1, wherein the electrochemical device is arranged at a corner portion having a positional relationship of 90 ° with the arranged corner portion.
  • the rotational position shift of the device is less likely to occur.
  • the first tab terminal In order to increase the width of the end portion where the first plating portion is formed to 0.4 times or more, it is necessary to form the first tab terminal thick to some extent, and as a result, the reduction of the area is hindered. It becomes difficult to arrange in.
  • the first tab terminal does not have to be formed so thick, and the area reduction is not hindered. Therefore, it becomes easy to arrange the first tab terminal in the virtual rectangular region, and the mounting area of the device on the circuit board can be reduced.
  • the shape of the first tab terminal is relatively simple, the processing cost can be suppressed, and the cost increase of the device can be avoided. Moreover, since it is flat form which does not have a level
  • the means 4 is characterized in that the first tab terminal is gradually widened every time it is bent from the end where the first plating portion is formed to the opposite end. Electrochemical device with terminal as described.
  • the mounting area on the circuit board is small, misalignment hardly occurs at the time of solder reflow, and high connection reliability in the solder joint portion.
  • the electrochemical device with a terminal which can provide can be provided.
  • the coin-type battery 11 with a terminal is a kind of electrochemical device with a terminal, and is mainly used as a power source for backup use in a small electronic device.
  • the coin-type battery 12 constituting the coin-type battery 11 with a terminal has a circular shape in plan view, and both the front and back surfaces are a negative electrode 13 and a positive electrode 14, respectively.
  • the lower surface side of the coin-type battery 12 shown in FIG. 3 is a negative electrode 13 as a first electrode
  • the upper surface side is a positive electrode 14 as a second electrode.
  • the area of the negative electrode 13 is somewhat smaller than that of the positive electrode 14.
  • the negative electrode 13 is disposed on the circuit board 1 side during component mounting.
  • the positive electrode 14 is disposed on the side opposite to the circuit board 1.
  • FIG. 5, FIG. 7, etc. show the circuit board 1 on which the terminal-equipped coin-type battery 11 of this embodiment is to be mounted.
  • a land area is set on the component mounting surface 4 of the circuit board 1, and the first land 3 and the second land 2 are arranged in the land area.
  • the second land 2 in the present embodiment is a part for soldering the second tab terminal 31 and is formed in an isosceles triangular shape using a conductive metal material such as copper plating.
  • the first land 3, which is a part for soldering the first tab terminal 21 is similarly formed using a conductive metal material such as copper plating, and has an area of 2.5 than the second land 2. It is formed in a rectangular shape about twice to 3.0 times larger.
  • preliminary solder is applied on the first lands 3 and the second lands 2 for convenience when performing solder reflow later.
  • wiring patterns 5 and 6 are connected to the first land 3 and the second land 2, respectively.
  • the first land 3 and the second land 2 are exposed from a solder resist layer (not shown), and the wiring patterns 5 and 6 are covered with a solder resist layer for insulation.
  • the first tab terminal 21 constituting the coin-type battery 11 with a terminal is a flat plate member made of a metal plate (a stainless steel plate having a thickness of 0.1 mm in this embodiment). is there.
  • the first tab terminal 21 has a relatively simple shape with no particular step in the thickness direction. Further, the first tab terminal 21 is formed in an approximately L shape in plan view, and a first plating portion 22 formed by coating both surfaces of the metal plate with tin plating is provided on one end portion 23a thereof. (Refer to the shaded area in FIGS. 2 and 3).
  • the first tab terminal 21 has two portions bent by 45 ° in plan view.
  • the first tab terminal 21 is gradually widened as it is bent from the end 23a where the first plating portion 22 is formed to the end 23b on the opposite side (W1, W2 in FIG. 2). , W3).
  • the first tab terminal 21 has a wide end 23 b welded to the negative electrode 13.
  • the first tab terminal 21 is disposed entirely within the region of the virtual rectangle 41. It has come to be.
  • the virtual rectangle 41 is an area having the same size (or slightly smaller) and the same shape as the land area. If the length of one side of the virtual rectangle 41 is defined as L1, the width W1 of the end portion 23a where the first plating portion 22 is formed in the first tab terminal 21 is less than 0.4 times the value of the length L1. Is set to The length L1 is preferably 0.2 times or more and less than 0.4 times. In the present embodiment, the width W1 is set to about 0.35 times the value of the length L1.
  • the second tab terminal 31 constituting the coin-type battery 11 with a terminal is a member made of a metal plate (a stainless steel plate having a thickness of 0.1 mm in this embodiment).
  • the 2nd tab terminal 31 has a right-angled bending part in two places in one edge part 33a of a metal plate, and has a level
  • the end portion 33a on the bent side of the second tab terminal 31 is located on the same plane as the first plating portion 22 of the first tab terminal 21 in consideration of surface mounting.
  • the end portion 33a is provided with a second plating portion 32 formed by coating both surfaces of the metal plate with tin plating (see hatched portions in FIGS. 1 and 3).
  • a second tab terminal 31 has a wide end 33 b welded to the positive electrode 14.
  • the second tab terminal 31 is also arranged in the area of the virtual rectangle 41 as a whole.
  • the virtual rectangle 41 has four corners C1, C2, C3, C4.
  • the virtual rectangle 41 has two orthogonal diagonal lines (not shown), and these diagonal lines intersect at the center O1.
  • the corners C2 and C4 do not belong to the diagonal line to which the reference corner C1 belongs, but are in a positional relationship belonging to the other diagonal. That is, the corners C2, C4 and the corner C1 have a rotation angle of 90 ° with respect to the center O1 of the coin-type battery 12.
  • the corner C3 belongs to a diagonal line to which the reference corner C1 belongs. That is, the corner C3 and the corner C1 have a rotation angle of 180 ° with respect to the center O1 of the coin-type battery 12.
  • the second plating portion 32 of the second tab terminal 31 is arranged at the corner portion C1 among the four corner portions C1 to C4.
  • a portion of the second plating portion 32 that is on the same plane as the first plating portion 22 has a substantially isosceles triangular shape, similar to the second land 2.
  • the first plating portion 22 of the first tab terminal 21 has a positional relationship in which the rotation angle with respect to the center O1 of the coin-type battery 12 is 90 ° with the corner portion C1 where the second plating portion 32 is disposed. It arrange
  • the area of the portion visible in the first plating part 22 (hereinafter simply referred to as “S1”. Further, the area of the portion that is visible in the second plating part 32 when viewed from the same side (hereinafter simply referred to as “the area of the second plating part 32”) is defined as S2.
  • S1 is a soldering area in the first tab terminal 21
  • S2 is a soldering area in the second tab terminal 31, which are present in the same plane.
  • the ratio of the area S1 of the first plating part 22 to the area S2 of the second plating part 32 is defined as Sr.
  • the value of Sr is more preferably 2.0 or more and 3.0 or less, and particularly preferably 2.5 or more and 3.0 or less.
  • the reason is that when the value of the area ratio Sr is within the above-described preferable range, sufficient peel strength can be imparted to the solder joint portion without preventing the first plating portion 22 from being reduced in area.
  • the area ratio Sr is less than 1.5, there is a possibility that sufficient peel strength cannot be imparted.
  • the area ratio Sr is more than 3.0, sufficient peel strength can be imparted, but the reduction of the area of the first plating part 22 is hindered, and there is a possibility that the overall size reduction becomes difficult.
  • the coin-type battery 11 with a terminal of the present embodiment having the above-described configuration is mounted on the circuit board 1 in a state as shown in FIG.
  • the first solder portion 22 is placed on the first land 3 on which the preliminary solder is applied, and the second solder portion 32 is mounted on the second land 2 on which the preliminary solder is similarly applied.
  • the reflow process heated to solder melting temperature in this state is implemented.
  • the first tab terminal 21 is joined to the first land 3 via the solder 45
  • the second tab terminal 31 is joined to the second land 2 via the solder 45.
  • the coin-type battery with terminal 11 and the circuit board 1 are electrically connected.
  • the value of the area ratio Sr is different by making the area S2 of the second plating portion 32 of the second tab terminal 31 constant and appropriately changing the area S1 of the first plating portion 22 of the first tab terminal 21.
  • Nine types of test samples were prepared and reflowed.
  • the Z direction peeling strength (N) and the Y direction peeling strength (N) were measured several times each according to the conventional method, and the average value was calculated
  • the Z-direction peel strength refers to the strength to peel when a load is applied in a direction perpendicular to the component mounting surface 4 of the circuit board 1 to the coin-type battery 11 with a terminal.
  • the Y-direction peel strength refers to strength that peels when a load is applied to the coin-type battery 11 with a terminal in a direction along the component mounting surface 4 of the circuit board 1. The results are shown in Table 1 below.
  • the peel strength tended to increase as the area ratio Sr increased.
  • the peel strength (N) in the Y direction when the area ratio Sr was 1.0, the standard 15N could not be achieved, but when the area ratio Sr was 1.5 or more, it could be achieved.
  • the peel strength (N) in the Z direction when the area ratio Sr is 1.0 to 2.0, the standard value of 15N could not be achieved, but when the area ratio Sr is 2.5 or more, it can be achieved. It was. However, it has been found that if the area ratio Sr is set to 3.0 or more, the first plating portion 22 must be formed large, which is disadvantageous from the viewpoint of overall miniaturization.
  • the coin-type battery 11 with each terminal was visually inspected after reflow, the rotational position deviation did not occur for each test sample. Therefore, the coin-type battery 11 with each terminal was soldered to the original correct position.
  • the first tab terminal 21 and the second tab terminal 31 are arranged in a region of a virtual rectangle 41 that circumscribes the circular coin-type battery 12. Therefore, the degree of overhang of the first tab terminal 21 and the second tab terminal 31 in the battery outer peripheral direction is reduced. Therefore, the mounting area on the circuit board 1 of the coin-type battery 11 with a terminal can be suppressed small. Further, as a result of adopting the mutual positional relationship and the area ratio Sr as described above for the first plating part 22 and the second plating part 32, the influence of the rotational moment acting on the coin-type battery 11 with a terminal during solder reflow is reduced. Is done.
  • the rotational position shift of the coin-type battery 11 with terminals hardly occurs, and the coin-type battery 11 with terminals is soldered to the original correct position. Therefore, the peel strength at the solder joint can be improved without hindering the reduction in the area of the first plating part 22, and high connection reliability can be imparted to the solder joint.
  • the first tab terminal 21 has only one first plating portion 22. Further, the first plating part 22 has a rotational angle with respect to the center O1 of the coin-type battery 12 as a corner part C2 having a positional relationship of 90 ° with the corner part C1 where the second plating part 32 is disposed. Has been placed. Therefore, compared with the case where the first plating part 22 and the second plating part 32 are arranged on the same diagonal line (that is, arranged at the corners C1 and C3 where the rotation angle is 180 °), The impact can be reduced more effectively. Therefore, according to this configuration, the rotational position shift of the coin-type battery 11 with a terminal is more difficult to occur.
  • the width W1 of the end 23a where the first plating portion 22 is formed in the first tab terminal 21 is set to be less than 0.4 times the length L1 of one side of the virtual rectangle 41. Yes.
  • the first tab terminal 21 needs to be formed to be thick to some extent, and as a result, the reduction in area is hindered. Becomes difficult.
  • the first tab terminal 21 does not have to be formed so thick and the area reduction is not hindered. Therefore, it becomes easy to arrange the first tab terminal 21 in the region of the virtual rectangle 41, and the mounting area on the circuit board 1 of the coin-type battery 11 with a terminal can be kept small.
  • the first tab terminal 21 of the present embodiment is a flat plate shape having no step in the thickness direction, and is substantially L-shaped in a plan view. Accordingly, since the shape of the first tab terminal 21 is relatively simple, the processing cost can be suppressed, and the cost increase of the coin-type battery 11 with a terminal can be avoided. Moreover, since it is flat form which does not have a level
  • the 1st tab terminal 21 and the 2nd tab terminal 31 of this embodiment have the 1st plating part 22 and the 2nd plating part 32 which consist of tin plating. Since the tin plating has good wettability with the solder, a suitable solder fillet is easily formed between the first land 3 and the first plating portion 22 and between the second land 2 and the second plating portion 32 when reflow is performed. . As a result, excess solder around the first plating portion 22 and the second plating portion 32 is collected and fixed, and the generation of solder balls can be prevented in advance. It also contributes to an improvement in peel strength.
  • the first tab terminal 21 has only one first plating part 22, and the first plating part 22 has a second rotation angle with respect to the center O ⁇ b> 1 of the coin-type battery 12.
  • the first plating part 22 has a second rotation angle with respect to the center O ⁇ b> 1 of the coin-type battery 12.
  • positioned it is not limited to this.
  • the area S1 of the first plating part 22 in these cases means the sum of the areas S1 of the two first plating parts 22.
  • the first plating part 22 and the second plating part 32 are made of tin plating, but plating other than tin plating (for example, gold plating, nickel plating, etc.) may be selected. That is, any conductive metal plating that can improve the solder wettability of the metal plate as the terminal forming material can be selected as appropriate.
  • the electrochemical device with a terminal is configured using an electrochemical device in which the first electrode is the negative electrode 13 and the second electrode is the positive electrode 14, but the first electrode is the positive electrode 14 and the second electrode is What was used as the negative electrode 13 may be used.
  • the electrochemical device with a terminal of the present invention is embodied as the coin-type battery 11 with a terminal, but it may of course be embodied in a coin-type capacitor with a terminal, for example.
  • the electrochemical device is a coin-type battery or a coin-type capacitor.
  • the first plating part and the second plating part are made of tin plating.
  • the first land and the second land are arranged in a land area having the same size and shape as the area.
  • the second land has an isosceles triangle shape, and the first land has a rectangular shape having a larger area than the second land.
  • the first tab terminal and the second tab terminal are soldered in a state where they are arranged on the first land and the second land on which preliminary soldering is performed. It must have been joined by reflow.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

[Problem] To provide a terminal-equipped electrochemical device that is resistant to shifting out of position during solder reflow, and that can impart high connection reliability to solder-joined portions, even on a circuit board having a small surface area for mounting. [Solution] This terminal-equipped electrochemical device (11) is provided with: an electrochemical device (12) of circular shape; a first tab terminal (21) having a first plated portion (22) at an end portion thereof; and a second tab terminal (31) having a second plated portion (32) at an end portion thereof. The first plated portion (22) and the second plated portion (32) are positioned on the same plane. The first tab terminal (21) and the second tab terminal (31) are situated within the area of a hypothetical rectangle (41) that circumscribes the electrochemical device (11). The second plated portion (32) is situated in one corner (C1) in the area. The first plated portion (22) is situated in at least one of the other three corners (C2-C4). The ratio of the surface area of the first plated portion (22) to the surface area of the second plated portion (32) is 1.5-3.0 inclusive.

Description

端子付き電気化学デバイスElectrochemical device with terminals
　本発明は、回路基板上にはんだ付けにより表面実装される端子付き電気化学デバイスに関するものである。 The present invention relates to an electrochemical device with terminals which is surface-mounted on a circuit board by soldering.
　近年、携帯電話や携帯情報端末などといった小型の電子機器におけるバックアップ用途の電源として、コイン型電池等の電気化学デバイスがよく用いられている。コイン型電池は表裏両面に電極を備えており、通常それらの電極には先端にめっきを施したタブ端子が接合されている。このような端子付きのコイン型電池は、回路基板上のランドに対してリフロー式はんだ付けにて接合された状態で使用される（例えば、特許文献１を参照）。 In recent years, electrochemical devices such as coin-type batteries are often used as a power source for backup in small electronic devices such as mobile phones and portable information terminals. Coin-type batteries have electrodes on both the front and back surfaces, and tab terminals with plating on the tips are usually joined to these electrodes. Such a coin-type battery with a terminal is used in a state where it is joined to a land on a circuit board by reflow soldering (see, for example, Patent Document 1).
　ところで、小型の電子機器のさらなるコンパクト化を達成するためには、各種部品を回路基板上に高密度に実装する必要がある。そのためには個々の部品について基板上での占有面積（以下「実装面積」と呼ぶ。）をできるだけ小さくすることが要求される。コイン型電池についても同様の要求があることから、通常は電池外周方向にタブ端子が大きく張り出さないようなデザインを採用している。より具体的にいうと、円形状をなすコイン型電池に外接する仮想矩形を想定した場合、その仮想矩形の領域内にタブ端子が配置されるようなデザインを採用している。また、回路基板側において一対のランドが形成されているランドエリアについても、上記の仮想矩形と同程度の小さな面積となるように設計している。同様に、タブ端子自体についても、ランドに合せて、できるだけめっき部を小面積に形成することが重要になる。 By the way, in order to achieve further downsizing of small electronic devices, it is necessary to mount various components on a circuit board with high density. For this purpose, it is required to reduce the occupied area (hereinafter referred to as “mounting area”) on the substrate as much as possible for each component. Since there is a similar requirement for a coin-type battery, a design is generally adopted in which the tab terminal does not protrude greatly in the battery outer peripheral direction. More specifically, when a virtual rectangle circumscribing a coin-shaped battery having a circular shape is assumed, a design is adopted in which tab terminals are arranged in the region of the virtual rectangle. The land area where the pair of lands are formed on the circuit board side is also designed to have a small area comparable to the virtual rectangle. Similarly, regarding the tab terminal itself, it is important to form a plating portion as small as possible in accordance with the land.
特開２００３−９２１０２号公報JP 2003-92102 A
　ところが、めっき部が小面積であるタブ端子を既設のランドにはんだ付けしようとしても、両者間に介在するはんだの量が不足する結果、はんだ接合部に十分な剥離強度を付与することが難しい。また、めっき部の小面積化のために幅狭のタブ端子を使用すると、タブ端子自体の強度低下が避けられない。このように、タブ端子のめっき部の小面積化には、一定の限界がある。 However, even when trying to solder a tab terminal having a small plating area to an existing land, it is difficult to give sufficient peel strength to the solder joint as a result of the insufficient amount of solder intervening between them. In addition, if a narrow tab terminal is used to reduce the area of the plated portion, the strength of the tab terminal itself cannot be avoided. Thus, there is a certain limit in reducing the area of the plated portion of the tab terminal.
　ここで、幅狭のタブ端子を使用した場合でも、ランドの面積を若干大きくしてはんだの量を増やせば、剥離強度の向上が期待できるとも考えられる。しかしながら、推奨サイズよりもいくぶん大きなランドに対してはんだ付けをした場合、リフロー時におけるはんだの溶融によって電池が回転し、位置ズレを生じてしまう。その結果、タブ端子がランドエリアから外れやすくなり、はんだ接合部に高い剥離強度を付与できなくなる。それゆえ、はんだ接合部の強度確保のため、タブ端子のめっき部の面積をあらかじめ大きくしておく必要がある。そして、これもタブ端子のめっき部やランドの小面積化を妨げるひとつの要因となっている。 Here, even when a narrow tab terminal is used, it is considered that an improvement in peel strength can be expected if the land area is slightly increased to increase the amount of solder. However, if soldering is performed on a land that is somewhat larger than the recommended size, the battery rotates due to melting of the solder during reflow, resulting in misalignment. As a result, the tab terminal is easily detached from the land area, and high peel strength cannot be imparted to the solder joint. Therefore, in order to ensure the strength of the solder joint portion, it is necessary to increase the area of the plated portion of the tab terminal in advance. This is also one factor that hinders the tab terminal plating and land area reduction.
　本発明は上記の課題に鑑みてなされたものであり、その目的は、回路基板上での実装面積が小さいにもかかわらず、はんだリフロー時に位置ズレが発生しにくく、はんだ接合部に高い接続信頼性を付与することができる端子付き電気化学デバイスを提供することにある。 The present invention has been made in view of the above-mentioned problems, and its purpose is to prevent misalignment during solder reflow despite a small mounting area on a circuit board, and to provide high connection reliability at a solder joint. It is providing the electrochemical device with a terminal which can provide property.
　上記課題を解決するための手段［１］~［５］を以下に列挙する。 Measures [1] to [5] for solving the above problems are listed below.
　［１］第１ランド及び第２ランドを有する回路基板上に表面実装される端子付き電気化学デバイスであって、前記回路基板側に配置される第１極及び前記第１極の反対側にある第２極を有する円形状の電気化学デバイスと、前記第１極に接合され、前記第１ランドにはんだ付けされる第１めっき部を端部に有する第１タブ端子と、前記第２極に接合され、前記第１めっき部と同一面上に端部が位置するように折り曲げ形成され、前記第２ランドにはんだ付けされる第２めっき部を前記端部に有する第２タブ端子とを備え、円形状の前記電気化学デバイスに外接する仮想矩形の領域内に前記第１タブ端子及び前記第２タブ端子が配置され、前記第２めっき部が前記領域における４つの角部のうちの１つに配置され、前記第１めっき部が他の３つの角部のうちの少なくとも１つに配置され、前記第１極側から見たときの前記第２めっき部の面積に対する前記第１めっき部の面積の比が１．５以上３．０以下であることを特徴とする端子付き電気化学デバイス。 [1] An electrochemical device with terminals surface-mounted on a circuit board having a first land and a second land, which is on the opposite side of the first pole and the first pole disposed on the circuit board side A circular electrochemical device having a second pole; a first tab terminal joined to the first pole and soldered to the first land; and a first tab terminal at an end; and the second pole A second tab terminal that is joined and bent so that the end portion is located on the same plane as the first plating portion, and has a second plating portion that is soldered to the second land at the end portion. The first tab terminal and the second tab terminal are disposed in a virtual rectangular region circumscribing the circular electrochemical device, and the second plating portion is one of four corners in the region. And the first plating part is the other 3 The ratio of the area of the first plating part to the area of the second plating part when viewed from the first pole side is 1.5 or more and 3.0 or less. An electrochemical device with a terminal, characterized by being.
　従って、手段１に記載の発明によると、円形状の電気化学デバイスに外接する仮想矩形の領域内に第１タブ端子及び第２タブ端子を配置していることから、これらタブ端子のデバイス外周方向への張出し度合が少なくなる。よって、端子付き電気化学デバイスの回路基板上での実装面積を小さく抑えることができる。また、第１めっき部及び第２めっき部について、上記のような相互位置関係及び面積比を採用した結果、はんだリフロー時にデバイスに対して働く回転モーメントの影響が軽減される。ゆえに、デバイスの回転位置ズレが起こりにくくなり、デバイスが本来の正しい位置にはんだ付けされる。よって、はんだ接合部に高い接続信頼性を付与することができる。 Therefore, according to the invention described in the means 1, since the first tab terminal and the second tab terminal are arranged in the virtual rectangular region circumscribing the circular electrochemical device, the device peripheral direction of these tab terminals is The degree of overhanging is reduced. Therefore, the mounting area on the circuit board of the electrochemical device with a terminal can be kept small. Moreover, about the 1st plating part and the 2nd plating part, as a result of employ | adopting the above mutual positional relationship and area ratio, the influence of the rotational moment which acts on a device at the time of solder reflow is reduced. Therefore, the rotational position shift of the device is less likely to occur, and the device is soldered to the original correct position. Therefore, high connection reliability can be imparted to the solder joint.
　［２］前記第１タブ端子は前記第１めっき部を１つのみ有するとともに、前記第１めっき部は、前記コイン型電池の中心を基準としたときの回転角が、前記第２めっき部が配置された角部と９０°をなす位置関係の角部に配置されていることを特徴とする手段１に記載の端子付き電気化学デバイス。 [2] The first tab terminal has only one first plating part, and the first plating part has a rotation angle with respect to the center of the coin-type battery, and the second plating part has The terminal-attached electrochemical device according to means 1, wherein the electrochemical device is arranged at a corner portion having a positional relationship of 90 ° with the arranged corner portion.
　従って、手段２に記載の発明によると、例えば第１めっき部及び第２めっき部が同一の対角線上に配置（即ち上記回転角が１８０°となる角部に配置）されている場合に比べて、上記回転モーメントの影響をより効果的に軽減することができる。ゆえに、デバイスの回転位置ズレがいっそう起こりにくくなる。 Therefore, according to the invention described in the means 2, for example, compared with a case where the first plating portion and the second plating portion are arranged on the same diagonal line (that is, arranged at the corner portion where the rotation angle is 180 °). The influence of the rotational moment can be reduced more effectively. Therefore, the rotational position shift of the device is less likely to occur.
　［３］前記第１タブ端子において前記第１めっき部が形成された端部の幅は、前記仮想矩形の一辺の長さの０．４倍未満であることを特徴とする手段１または２に記載の端子付き電気化学デバイス。 [3] Means 1 or 2 characterized in that the width of the end of the first tab terminal where the first plated portion is formed is less than 0.4 times the length of one side of the virtual rectangle. Electrochemical device with terminal as described.
　第１めっき部が形成された端部の幅が０．４倍以上にするためには、第１タブ端子をある程度太く形成する必要があり、小面積化が妨げられる結果、仮想矩形の領域内に配置することが困難になる。これに対し、手段３に記載の発明によると、第１タブ端子をそれほど太く形成しなくてもよく、小面積化が妨げられない。よって、第１タブ端子を仮想矩形の領域内に配置しやすくなり、デバイスの回路基板上での実装面積を小さく抑えることができる。 In order to increase the width of the end portion where the first plating portion is formed to 0.4 times or more, it is necessary to form the first tab terminal thick to some extent, and as a result, the reduction of the area is hindered. It becomes difficult to arrange in. On the other hand, according to the invention described in the means 3, the first tab terminal does not have to be formed so thick, and the area reduction is not hindered. Therefore, it becomes easy to arrange the first tab terminal in the virtual rectangular region, and the mounting area of the device on the circuit board can be reduced.
　［４］前記第１タブ端子は、厚さ方向に段差を有しない平板状であって、かつ平面視で略Ｌ字状に形成されていることを特徴とする手段１乃至３のいずれか１項に記載の端子付き電気化学デバイス。 [4] Any one of the means 1 to 3, wherein the first tab terminal has a flat plate shape having no step in the thickness direction and is formed in a substantially L shape in a plan view. The electrochemical device with a terminal as described in a term.
　従って、手段４に記載の発明によると、第１タブ端子の形状が比較的単純なものとなるため、加工コストを抑えることができ、デバイスの高コスト化を回避することができる。また、厚さ方向に段差を有しない平板状であることから、デバイス形状の自由度を低下させにくいという利点がある。 Therefore, according to the invention described in the means 4, since the shape of the first tab terminal is relatively simple, the processing cost can be suppressed, and the cost increase of the device can be avoided. Moreover, since it is flat form which does not have a level | step difference in thickness direction, there exists an advantage that it is hard to reduce the freedom degree of a device shape.
　［５］前記第１タブ端子は、前記第１めっき部が形成された端部から反対側の端部に行くに従って屈曲するごとに段階的に幅広になっていることを特徴とする手段４に記載の端子付き電気化学デバイス。 [5] The means 4 is characterized in that the first tab terminal is gradually widened every time it is bent from the end where the first plating portion is formed to the opposite end. Electrochemical device with terminal as described.
　従って、手段５に記載の発明によると、第１タブ端子の形状が比較的単純なものとなるため、加工コストを抑えることができ、デバイスの高コスト化を回避することができる。 Therefore, according to the invention described in means 5, since the shape of the first tab terminal is relatively simple, the processing cost can be suppressed and the increase in the cost of the device can be avoided.
　以上詳述したように、手段１~５に記載の発明によると、回路基板上での実装面積が小さいにもかかわらず、はんだリフロー時に位置ズレが発生しにくく、はんだ接合部に高い接続信頼性を付与することができる端子付き電気化学デバイスを提供することができる。 As described above in detail, according to the inventions described in the means 1 to 5, although the mounting area on the circuit board is small, misalignment hardly occurs at the time of solder reflow, and high connection reliability in the solder joint portion. The electrochemical device with a terminal which can provide can be provided.
本発明を具体化した一実施形態の端子付きコイン型電池を、第２極である正極側から見たときの概略図。Schematic when the coin-type battery with a terminal of an embodiment embodying the present invention is viewed from the positive electrode side which is the second electrode. 実施形態の端子付きコイン型電池を、第１極である負極側から見たときの概略図。The schematic when the coin-type battery with a terminal of the embodiment is viewed from the negative electrode side which is the first pole. 実施形態の端子付きコイン型電池を側面側から見たときの概略分解図。The schematic exploded view when the coin-type battery with terminal of the embodiment is viewed from the side surface side. 実施形態の端子付きコイン型電池を側面側から見たときの概略図。Schematic when the coin-type battery with terminal of the embodiment is viewed from the side surface side. 回路基板のランドエリアを示す部分平面図。The partial top view which shows the land area of a circuit board. 回路基板上に端子付きコイン型電池を表面実装した状態を示す概略平面図。The schematic plan view which shows the state which surface-mounted the coin-type battery with a terminal on a circuit board. 回路基板上に端子付きコイン型電池を表面実装した状態を示す概略正面図。The schematic front view which shows the state which surface-mounted the coin-type battery with a terminal on a circuit board. 別の実施形態の端子付きコイン型電池を示す概略平面図。The schematic plan view which shows the coin-type battery with a terminal of another embodiment. 別の実施形態の端子付きコイン型電池を示す概略平面図。The schematic plan view which shows the coin-type battery with a terminal of another embodiment.
　以下、本発明の端子付き電気化学デバイスを具体化した実施の形態を図１~図７に基づき詳細に説明する。 Hereinafter, embodiments of the electrochemical device with terminals of the present invention will be described in detail with reference to FIGS.
　図１~図４に示されるように、本実施形態の端子付きコイン型電池１１は、端子付き電気化学デバイスの一種であって、主として小型の電子機器におけるバックアップ用途の電源として用いられるものである。この端子付きコイン型電池１１を構成するコイン型電池１２は、平面視で円形状を呈しており、表裏両面がそれぞれ負極１３及び正極１４となっている。具体的には、図３に示すコイン型電池１２の下面側が第１極としての負極１３、上面側が第２極としての正極１４となっている。このコイン型電池１２の場合、負極１３の面積のほうが正極１４よりもいくぶん小さくなっている。部品実装時に負極１３は回路基板１側に配置される。一方、正極１４は回路基板１とは反対側に配置される。 As shown in FIGS. 1 to 4, the coin-type battery 11 with a terminal according to the present embodiment is a kind of electrochemical device with a terminal, and is mainly used as a power source for backup use in a small electronic device. . The coin-type battery 12 constituting the coin-type battery 11 with a terminal has a circular shape in plan view, and both the front and back surfaces are a negative electrode 13 and a positive electrode 14, respectively. Specifically, the lower surface side of the coin-type battery 12 shown in FIG. 3 is a negative electrode 13 as a first electrode, and the upper surface side is a positive electrode 14 as a second electrode. In the case of this coin-type battery 12, the area of the negative electrode 13 is somewhat smaller than that of the positive electrode 14. The negative electrode 13 is disposed on the circuit board 1 side during component mounting. On the other hand, the positive electrode 14 is disposed on the side opposite to the circuit board 1.
　ここで、図５、図７等には、本実施形態の端子付きコイン型電池１１が実装されるべき回路基板１が示されている。この回路基板１の部品実装面４上にはランドエリアが設定されており、そのランドエリア内には第１ランド３及び第２ランド２が配置されている。本実施形態における第２ランド２は、第２タブ端子３１をはんだ付けするための部分であって、銅めっき等の導電金属材料を用いて二等辺三角形状に形成されている。一方、第１タブ端子２１をはんだ付けするための部分である第１ランド３は、同様に銅めっき等の導電金属材料を用いて形成されるとともに、第２ランド２よりも面積が２．５倍~３．０倍程度大きい矩形状に形成されている。なお、これら第１ランド３及び第２ランド２の上には、後にはんだリフローを行うときの便宜のために予備はんだが施されている。また、第１ランド３及び第２ランド２にはそれぞれ配線パターン５，６が接続されている。第１ランド３及び第２ランド２は図示しないソルダーレジスト層から露出しており、配線パターン５，６は絶縁のためソルダーレジスト層で覆われている。 Here, FIG. 5, FIG. 7, etc. show the circuit board 1 on which the terminal-equipped coin-type battery 11 of this embodiment is to be mounted. A land area is set on the component mounting surface 4 of the circuit board 1, and the first land 3 and the second land 2 are arranged in the land area. The second land 2 in the present embodiment is a part for soldering the second tab terminal 31 and is formed in an isosceles triangular shape using a conductive metal material such as copper plating. On the other hand, the first land 3, which is a part for soldering the first tab terminal 21, is similarly formed using a conductive metal material such as copper plating, and has an area of 2.5 than the second land 2. It is formed in a rectangular shape about twice to 3.0 times larger. Note that preliminary solder is applied on the first lands 3 and the second lands 2 for convenience when performing solder reflow later. Further, wiring patterns 5 and 6 are connected to the first land 3 and the second land 2, respectively. The first land 3 and the second land 2 are exposed from a solder resist layer (not shown), and the wiring patterns 5 and 6 are covered with a solder resist layer for insulation.
　図２、図３等に示されるように、端子付きコイン型電池１１を構成する第１タブ端子２１は、金属板（本実施形態では０．１ｍｍ厚のステンレス板）からなる平板状の部材である。第１タブ端子２１は、厚さ方向に特に段差を有していない比較的単純な形状を有している。また、第１タブ端子２１は平面視で略Ｌ字状に形成されており、その一方の端部２３ａには金属板両面をスズめっきで被覆してなる第１めっき部２２が設けられている（図２、図３等の斜線部を参照）。第１タブ端子２１は、平面視において４５°屈曲された箇所を２つ有している。そして、第１タブ端子２１は、第１めっき部２２が形成された端部２３ａから反対側の端部２３ｂに行くに従って屈曲するごとに段階的に幅広になっている（図２のＷ１，Ｗ２，Ｗ３を参照）。そして、このような第１タブ端子２１は、幅広に形成された端部２３ｂが負極１３に溶接されている。本実施形態において負極１３側の溶接部２８は２箇所であり、コイン型電池１２の中心Ｏ１を挟む両側の位置に設定されている。 As shown in FIGS. 2 and 3, the first tab terminal 21 constituting the coin-type battery 11 with a terminal is a flat plate member made of a metal plate (a stainless steel plate having a thickness of 0.1 mm in this embodiment). is there. The first tab terminal 21 has a relatively simple shape with no particular step in the thickness direction. Further, the first tab terminal 21 is formed in an approximately L shape in plan view, and a first plating portion 22 formed by coating both surfaces of the metal plate with tin plating is provided on one end portion 23a thereof. (Refer to the shaded area in FIGS. 2 and 3). The first tab terminal 21 has two portions bent by 45 ° in plan view. The first tab terminal 21 is gradually widened as it is bent from the end 23a where the first plating portion 22 is formed to the end 23b on the opposite side (W1, W2 in FIG. 2). , W3). The first tab terminal 21 has a wide end 23 b welded to the negative electrode 13. In the present embodiment, there are two welded portions 28 on the negative electrode 13 side, which are set at positions on both sides of the center O1 of the coin-type battery 12.
　ここで、図１，図２に示されるように、円形状のコイン型電池１２に外接する仮想矩形４１を想定した場合、第１タブ端子２１は全体的にその仮想矩形４１の領域内に配置されるようになっている。本実施形態において、仮想矩形４１は上記ランドエリアと同等の（あるいは僅かに小さい）大きさかつ同等の形状の領域となっている。仮想矩形４１の一辺の長さをＬ１と定義すると、第１タブ端子２１において第１めっき部２２が形成された端部２３ａの幅Ｗ１は、長さＬ１の値の０．４倍未満となるように設定されている。上記長さＬ１は好ましくは０．２倍以上０．４倍未満である。本実施形態では、幅Ｗ１が長さＬ１の値の０．３５倍程度に設定されている。 Here, as shown in FIG. 1 and FIG. 2, when a virtual rectangle 41 circumscribing the circular coin-type battery 12 is assumed, the first tab terminal 21 is disposed entirely within the region of the virtual rectangle 41. It has come to be. In the present embodiment, the virtual rectangle 41 is an area having the same size (or slightly smaller) and the same shape as the land area. If the length of one side of the virtual rectangle 41 is defined as L1, the width W1 of the end portion 23a where the first plating portion 22 is formed in the first tab terminal 21 is less than 0.4 times the value of the length L1. Is set to The length L1 is preferably 0.2 times or more and less than 0.4 times. In the present embodiment, the width W1 is set to about 0.35 times the value of the length L1.
　図１、図３等に示されるように、端子付きコイン型電池１１を構成する第２タブ端子３１は、金属板（本実施形態では０．１ｍｍ厚のステンレス板）からなる部材である。ただし、第２タブ端子３１は、金属板の一方の端部３３ａにおける２箇所に直角折曲部を有しており、厚さ方向に段差を有している。つまり、第１タブ端子２１が二次元的な形状を有していたのに対し、第２タブ端子３１は三次元的な形状を有している。第２タブ端子３１において折り曲げられた側の端部３３ａは、表面実装のことを考慮して、第１タブ端子２１の第１めっき部２２と同一面上に位置している。また、当該端部３３ａには、金属板両面をスズめっきで被覆してなる第２めっき部３２が設けられている（図１、図３等の斜線部を参照）。そして、このような第２タブ端子３１は、幅広に形成された端部３３ｂが正極１４に溶接されている。本実施形態において正極１４側の溶接部２８は２箇所であり、コイン型電池１２の中心Ｏ１を挟む両側の位置に設定されている。なお、第２タブ端子３１についても、全体的に上記仮想矩形４１の領域内に配置されるようになっている。 As shown in FIG. 1, FIG. 3, etc., the second tab terminal 31 constituting the coin-type battery 11 with a terminal is a member made of a metal plate (a stainless steel plate having a thickness of 0.1 mm in this embodiment). However, the 2nd tab terminal 31 has a right-angled bending part in two places in one edge part 33a of a metal plate, and has a level | step difference in the thickness direction. That is, while the first tab terminal 21 has a two-dimensional shape, the second tab terminal 31 has a three-dimensional shape. The end portion 33a on the bent side of the second tab terminal 31 is located on the same plane as the first plating portion 22 of the first tab terminal 21 in consideration of surface mounting. Further, the end portion 33a is provided with a second plating portion 32 formed by coating both surfaces of the metal plate with tin plating (see hatched portions in FIGS. 1 and 3). Such a second tab terminal 31 has a wide end 33 b welded to the positive electrode 14. In the present embodiment, there are two welding portions 28 on the positive electrode 14 side, which are set at positions on both sides of the center O1 of the coin-type battery 12. The second tab terminal 31 is also arranged in the area of the virtual rectangle 41 as a whole.
　図１、図２等に示されるように、仮想矩形４１は４つの角部Ｃ１，Ｃ２，Ｃ３，Ｃ４を有している。仮想矩形４１は２つの直交する対角線（図示略）を有しており、それらの対角線は中心Ｏ１にて交差している。そして、１つの角部Ｃ１を基準とした場合、角部Ｃ２，Ｃ４は、基準の角部Ｃ１が属する対角線上には属しておらず、もう一方の対角線上に属する位置関係にある。つまり、角部Ｃ２，Ｃ４と角部Ｃ１とは、コイン型電池１２の中心Ｏ１を基準としたときの回転角が、９０°となっている。また、角部Ｃ１を基準とした場合、角部Ｃ３は、基準の角部Ｃ１が属する対角線上に属している。つまり、角部Ｃ３と角部Ｃ１とは、コイン型電池１２の中心Ｏ１を基準としたときの回転角が、１８０°となっている。 As shown in FIG. 1, FIG. 2, etc., the virtual rectangle 41 has four corners C1, C2, C3, C4. The virtual rectangle 41 has two orthogonal diagonal lines (not shown), and these diagonal lines intersect at the center O1. When one corner C1 is used as a reference, the corners C2 and C4 do not belong to the diagonal line to which the reference corner C1 belongs, but are in a positional relationship belonging to the other diagonal. That is, the corners C2, C4 and the corner C1 have a rotation angle of 90 ° with respect to the center O1 of the coin-type battery 12. When the corner C1 is used as a reference, the corner C3 belongs to a diagonal line to which the reference corner C1 belongs. That is, the corner C3 and the corner C1 have a rotation angle of 180 ° with respect to the center O1 of the coin-type battery 12.
　そして、第２タブ端子３１の第２めっき部３２は、４つある角部Ｃ１~Ｃ４のうち、角部Ｃ１に配置されている。第２めっき部３２において第１めっき部２２と同一平面上にある部分は、第２ランド２と同様に略二等辺三角形状となっている。第１タブ端子２１の第１めっき部２２は、コイン型電池１２の中心Ｏ１を基準としたときの回転角が、第２めっき部３２が配置された角部Ｃ１と９０°をなす位置関係の角部Ｃ２に配置されている。 The second plating portion 32 of the second tab terminal 31 is arranged at the corner portion C1 among the four corner portions C1 to C4. A portion of the second plating portion 32 that is on the same plane as the first plating portion 22 has a substantially isosceles triangular shape, similar to the second land 2. The first plating portion 22 of the first tab terminal 21 has a positional relationship in which the rotation angle with respect to the center O1 of the coin-type battery 12 is 90 ° with the corner portion C1 where the second plating portion 32 is disposed. It arrange | positions at the corner | angular part C2.
　図２に示されるように、端子付きコイン型電池１１を負極１３側、即ち回路基板１に向ける面の側から見たとき、第１めっき部２２において可視となる部分の面積（以下、単に「第１めっき部２２の面積」と呼ぶ。）をＳ１と定義する。また、同じ側から見たとき、第２めっき部３２において可視となる部分の面積（以下、単に「第２めっき部３２の面積」と呼ぶ。）をＳ２と定義する。換言すると、Ｓ１は第１タブ端子２１におけるはんだ付け面積、Ｓ２は第２タブ端子３１におけるはんだ付け面積であり、これらは同一面内に存在している。そして、第２めっき部３２の面積Ｓ２に対する第１めっき部２２の面積Ｓ１の比をＳｒと定義する。本実施形態では、Ｓｒ（＝Ｓ１／Ｓ２）の値が１．５以上３．０以下になるように設計している。Ｓｒの値は２．０以上３．０以下がより好ましく、２．５以上３．０以下が特に好ましい。その理由は、面積比Ｓｒの値が上記好適範囲内であると、第１めっき部２２の小面積化を妨げることなく、はんだ接合部に十分な剥離強度を付与することができるからである。これに対して、例えば、面積比Ｓｒが１．５未満であると、十分な剥離強度を付与できなくなるおそれがある。逆に、面積比Ｓｒが３．０超であると、十分な剥離強度を付与できる一方で第１めっき部２２の小面積化が妨げられ、全体の小型化が困難になるおそれがある。 As shown in FIG. 2, when the coin-type battery 11 with a terminal is viewed from the negative electrode 13 side, that is, the side facing the circuit board 1, the area of the portion visible in the first plating part 22 (hereinafter simply referred to as “ The area of the first plating portion 22 is referred to as “S1”. Further, the area of the portion that is visible in the second plating part 32 when viewed from the same side (hereinafter simply referred to as “the area of the second plating part 32”) is defined as S2. In other words, S1 is a soldering area in the first tab terminal 21, and S2 is a soldering area in the second tab terminal 31, which are present in the same plane. The ratio of the area S1 of the first plating part 22 to the area S2 of the second plating part 32 is defined as Sr. In this embodiment, it is designed so that the value of Sr (= S1 / S2) is 1.5 or more and 3.0 or less. The value of Sr is more preferably 2.0 or more and 3.0 or less, and particularly preferably 2.5 or more and 3.0 or less. The reason is that when the value of the area ratio Sr is within the above-described preferable range, sufficient peel strength can be imparted to the solder joint portion without preventing the first plating portion 22 from being reduced in area. On the other hand, for example, if the area ratio Sr is less than 1.5, there is a possibility that sufficient peel strength cannot be imparted. On the other hand, when the area ratio Sr is more than 3.0, sufficient peel strength can be imparted, but the reduction of the area of the first plating part 22 is hindered, and there is a possibility that the overall size reduction becomes difficult.
　上記構成を有する本実施形態の端子付きコイン型電池１１は、図６に示されるような状態で回路基板１上に搭載される。このとき、予備はんだが施された第１ランド３上に第１はんだ部２２を載置し、同じく予備はんだが施された第２ランド２上に第２はんだ部３２を載置するようにする。そしてこの状態ではんだ溶融温度に加熱するリフロー工程を実施する。すると、図７に示されるように、第１ランド３上に第１タブ端子２１がはんだ４５を介して接合され、第２ランド２上に第２タブ端子３１がはんだ４５を介して接合される。以上の結果、端子付きコイン型電池１１と回路基板１とが電気的に接続される。 The coin-type battery 11 with a terminal of the present embodiment having the above-described configuration is mounted on the circuit board 1 in a state as shown in FIG. At this time, the first solder portion 22 is placed on the first land 3 on which the preliminary solder is applied, and the second solder portion 32 is mounted on the second land 2 on which the preliminary solder is similarly applied. . And the reflow process heated to solder melting temperature in this state is implemented. Then, as shown in FIG. 7, the first tab terminal 21 is joined to the first land 3 via the solder 45, and the second tab terminal 31 is joined to the second land 2 via the solder 45. . As a result, the coin-type battery with terminal 11 and the circuit board 1 are electrically connected.
　以下、端子付きコイン型電池１１について行った評価試験について説明する。ここでは、第２タブ端子３１の第２めっき部３２の面積Ｓ２を一定にし、第１タブ端子２１の第１めっき部２２の面積Ｓ１を適宜変更することで、上記面積比Ｓｒの値が異なる９種類の試験サンプルを作製し、リフローを行った。第１めっき部２２の面積Ｓ１を変更する方法としては、第１めっき部２２の幅Ｗ１を増減する方法や、第１めっき部２２を電池外周部に張り出す方法などを採用した。そして、これら試験サンプルについて、常法に従いそれぞれ複数回ずつＺ方向剥離強度（Ｎ）及びＹ方向剥離強度（Ｎ）を測定し、個々に平均値を求めた。 Hereinafter, an evaluation test performed on the coin-type battery 11 with terminals will be described. Here, the value of the area ratio Sr is different by making the area S2 of the second plating portion 32 of the second tab terminal 31 constant and appropriately changing the area S1 of the first plating portion 22 of the first tab terminal 21. Nine types of test samples were prepared and reflowed. As a method of changing the area S1 of the first plating part 22, a method of increasing / decreasing the width W1 of the first plating part 22, a method of projecting the first plating part 22 to the battery outer peripheral part, or the like was adopted. And about these test samples, the Z direction peeling strength (N) and the Y direction peeling strength (N) were measured several times each according to the conventional method, and the average value was calculated | required separately.
　なお、Ｚ方向剥離強度とは、端子付きコイン型電池１１に対して回路基板１の部品実装面４に垂直な方向に荷重を加えたときに剥離する強度のことを指す。Ｙ方向剥離強度とは、端子付きコイン型電池１１に対して回路基板１の部品実装面４に沿った方向に荷重を加えたときに剥離する強度のことを指す。その結果を以下の表１に示す。 The Z-direction peel strength refers to the strength to peel when a load is applied in a direction perpendicular to the component mounting surface 4 of the circuit board 1 to the coin-type battery 11 with a terminal. The Y-direction peel strength refers to strength that peels when a load is applied to the coin-type battery 11 with a terminal in a direction along the component mounting surface 4 of the circuit board 1. The results are shown in Table 1 below.
　ちなみに、本評価試験では１５Ｎ以上の剥離強度を達成できるか否かを一応の目安とした。なお、リフロー後に各端子付きコイン型電池１１を目視検査することで、回転位置ズレの発生状況の調査も行った。
Figure JPOXMLDOC01-appb-T000001
 Incidentally, in this evaluation test, whether or not a peel strength of 15 N or more can be achieved was used as a rough standard. In addition, the state of occurrence of rotational position deviation was also examined by visually inspecting the coin-type battery 11 with each terminal after reflow.
Figure JPOXMLDOC01-appb-T000001
　表１から明らかなように、剥離強度は面積比Ｓｒが大きくなるほど増大する傾向にあった。Ｙ方向剥離強度（Ｎ）について見ると、面積比Ｓｒが１．０のときには目安である１５Ｎを達成できなかったのに対し、１．５以上のときには達成することができた。また、Ｚ方向剥離強度（Ｎ）について見ると、面積比Ｓｒが１．０~２．０のときには目安である１５Ｎを達成できなかったのに対し、２．５以上のときには達成することができた。しかしながら、面積比Ｓｒを３．０以上に設定しようとすると、第１めっき部２２を大きく形成せざるをえなくなるため、全体の小型化の観点から不利になることがわかった。また、リフロー後に各端子付きコイン型電池１１を目視検査したところ、各試験サンプルについて回転位置ズレは発生していなかった。ゆえに、各端子付きコイン型電池１１が本来の正しい位置にはんだ付けされていた。 As is clear from Table 1, the peel strength tended to increase as the area ratio Sr increased. Looking at the peel strength (N) in the Y direction, when the area ratio Sr was 1.0, the standard 15N could not be achieved, but when the area ratio Sr was 1.5 or more, it could be achieved. Further, when looking at the peel strength (N) in the Z direction, when the area ratio Sr is 1.0 to 2.0, the standard value of 15N could not be achieved, but when the area ratio Sr is 2.5 or more, it can be achieved. It was. However, it has been found that if the area ratio Sr is set to 3.0 or more, the first plating portion 22 must be formed large, which is disadvantageous from the viewpoint of overall miniaturization. Moreover, when the coin-type battery 11 with each terminal was visually inspected after reflow, the rotational position deviation did not occur for each test sample. Therefore, the coin-type battery 11 with each terminal was soldered to the original correct position.
　また、特に図示しないが、第１はんだ部２２の位置を角部Ｃ２と角部Ｃ３との中間位置に移動した参考例を作製し、面積比Ｓｒをいくつか変更して同様の評価試験を行った。その結果、剥離強度についてはほぼ同様の傾向が認められた。しかしながら、リフロー後に目視検査したところ、回転位置ズレが多く発生する結果となった。これは第１はんだ部２２と第２はんだ部３２との相互位置関係が適切ではなく、はんだリフロー時に働く回転モーメントの影響が十分に軽減されなかったことに起因するものと推察された。 In addition, although not particularly illustrated, a reference example in which the position of the first solder portion 22 is moved to an intermediate position between the corner portion C2 and the corner portion C3 is manufactured, and a similar evaluation test is performed by changing some area ratios Sr. It was. As a result, almost the same tendency was observed with respect to the peel strength. However, visual inspection after reflowing resulted in a large amount of rotational misalignment. This is presumably because the mutual positional relationship between the first solder part 22 and the second solder part 32 is not appropriate, and the influence of the rotational moment acting during solder reflow has not been sufficiently reduced.
　従って、本実施の形態によれば以下の効果を得ることができる。 Therefore, according to the present embodiment, the following effects can be obtained.
　（１）本実施形態の端子付きコイン型電池１１では、円形状のコイン型電池１２に外接する仮想矩形４１の領域内に第１タブ端子２１及び第２タブ端子３１を配置している。そのことから、第１タブ端子２１及び第２タブ端子３１の電池外周方向への張出し度合が少なくなる。よって、端子付きコイン型電池１１の回路基板１上での実装面積を小さく抑えることができる。また、第１めっき部２２及び第２めっき部３２について、上記のような相互位置関係及び面積比Ｓｒを採用した結果、はんだリフロー時に端子付きコイン型電池１１に対して働く回転モーメントの影響が軽減される。ゆえに、端子付きコイン型電池１１の回転位置ズレが起こりにくくなり、端子付きコイン型電池１１が本来の正しい位置にはんだ付けされるようになる。よって、第１めっき部２２の小面積化を妨げることなく、はんだ接合部における剥離強度を向上することができ、はんだ接合部に高い接続信頼性を付与することができる。 (1) In the coin-type battery 11 with a terminal according to the present embodiment, the first tab terminal 21 and the second tab terminal 31 are arranged in a region of a virtual rectangle 41 that circumscribes the circular coin-type battery 12. Therefore, the degree of overhang of the first tab terminal 21 and the second tab terminal 31 in the battery outer peripheral direction is reduced. Therefore, the mounting area on the circuit board 1 of the coin-type battery 11 with a terminal can be suppressed small. Further, as a result of adopting the mutual positional relationship and the area ratio Sr as described above for the first plating part 22 and the second plating part 32, the influence of the rotational moment acting on the coin-type battery 11 with a terminal during solder reflow is reduced. Is done. Therefore, the rotational position shift of the coin-type battery 11 with terminals hardly occurs, and the coin-type battery 11 with terminals is soldered to the original correct position. Therefore, the peel strength at the solder joint can be improved without hindering the reduction in the area of the first plating part 22, and high connection reliability can be imparted to the solder joint.
　（２）本実施形態では、第１タブ端子２１が第１めっき部２２を１つのみ有している。また、第１めっき部２２は、コイン型電池１２の中心Ｏ１を基準としたときの回転角が、第２めっき部３２が配置された角部Ｃ１と９０°をなす位置関係の角部Ｃ２に配置されている。従って、第１めっき部２２及び第２めっき部３２が同一の対角線上に配置（即ち上記回転角が１８０°となる角部Ｃ１，Ｃ３に配置）されている場合に比べて、上記回転モーメントの影響をより効果的に軽減することができる。ゆえに、この構成によると、端子付きコイン型電池１１の回転位置ズレがいっそう起こりにくくなる。 (2) In the present embodiment, the first tab terminal 21 has only one first plating portion 22. Further, the first plating part 22 has a rotational angle with respect to the center O1 of the coin-type battery 12 as a corner part C2 having a positional relationship of 90 ° with the corner part C1 where the second plating part 32 is disposed. Has been placed. Therefore, compared with the case where the first plating part 22 and the second plating part 32 are arranged on the same diagonal line (that is, arranged at the corners C1 and C3 where the rotation angle is 180 °), The impact can be reduced more effectively. Therefore, according to this configuration, the rotational position shift of the coin-type battery 11 with a terminal is more difficult to occur.
　（３）本実施形態では、第１タブ端子２１において第１めっき部２２が形成された端部２３ａの幅Ｗ１を、仮想矩形４１の一辺の長さＬ１の０．４倍未満に設定している。端部２３ａの幅Ｗ１を０．４倍以上にするためには、第１タブ端子２１をある程度太く形成する必要があり、小面積化が妨げられる結果、仮想矩形４１の領域内に配置することが困難になる。これに対して本実施形態では、第１タブ端子２１をそれほど太く形成しなくてもよく、小面積化が妨げられない。よって、第１タブ端子２１を仮想矩形４１の領域内に配置しやすくなり、端子付きコイン型電池１１の回路基板１上での実装面積を小さく抑えることができる。 (3) In the present embodiment, the width W1 of the end 23a where the first plating portion 22 is formed in the first tab terminal 21 is set to be less than 0.4 times the length L1 of one side of the virtual rectangle 41. Yes. In order to increase the width W1 of the end portion 23a by 0.4 times or more, the first tab terminal 21 needs to be formed to be thick to some extent, and as a result, the reduction in area is hindered. Becomes difficult. On the other hand, in the present embodiment, the first tab terminal 21 does not have to be formed so thick and the area reduction is not hindered. Therefore, it becomes easy to arrange the first tab terminal 21 in the region of the virtual rectangle 41, and the mounting area on the circuit board 1 of the coin-type battery 11 with a terminal can be kept small.
　（４）本実施形態の第１タブ端子２１は、厚さ方向に段差を有しない平板状であって、かつ平面視で略Ｌ字状に形成されている。従って、第１タブ端子２１の形状が比較的単純なものとなるため、加工コストを抑えることができ、端子付きコイン型電池１１の高コスト化を回避することができる。また、厚さ方向に段差を有しない平板状であることから、形状の自由度を低下させにくいという利点がある。 (4) The first tab terminal 21 of the present embodiment is a flat plate shape having no step in the thickness direction, and is substantially L-shaped in a plan view. Accordingly, since the shape of the first tab terminal 21 is relatively simple, the processing cost can be suppressed, and the cost increase of the coin-type battery 11 with a terminal can be avoided. Moreover, since it is flat form which does not have a level | step difference in thickness direction, there exists an advantage that it is hard to reduce the freedom degree of a shape.
　（５）本実施形態の第１タブ端子２１及び第２タブ端子３１は、スズめっきからなる第１めっき部２２及び第２めっき部３２を有している。スズめっきははんだとの濡れ性がよいことから、リフローを行うと第１ランド３−第１めっき部２２間、第２ランド２−第２めっき部３２間に好適なはんだフィレットが形成されやすくなる。その結果、第１めっき部２２及び第２めっき部３２の周辺の余分なはんだが集められて固定されるとともに、はんだボールの発生を未然に防ぐことができる。また、剥離強度の向上にも貢献する。 (5) The 1st tab terminal 21 and the 2nd tab terminal 31 of this embodiment have the 1st plating part 22 and the 2nd plating part 32 which consist of tin plating. Since the tin plating has good wettability with the solder, a suitable solder fillet is easily formed between the first land 3 and the first plating portion 22 and between the second land 2 and the second plating portion 32 when reflow is performed. . As a result, excess solder around the first plating portion 22 and the second plating portion 32 is collected and fixed, and the generation of solder balls can be prevented in advance. It also contributes to an improvement in peel strength.
　なお、本発明の各実施の形態は以下のように変更してもよい。 Note that each embodiment of the present invention may be modified as follows.
　・上記実施形態では、第１タブ端子２１は第１めっき部２２を１つのみ有するとともに、第１めっき部２２は、コイン型電池１２の中心Ｏ１を基準としたときの回転角が、第２めっき部３２が配置された角部Ｃ１と９０°をなす位置関係の角部Ｃ２に配置されていたが、これに限定されない。例えば、図８に示す別の実施形態の端子付きコイン型電池１１Ａのように、第１めっき部２２を２つ有するものとし、それらを角部Ｃ２，Ｃ４に配置する態様としてもよい。あるいは、図９に示す別の実施形態の端子付きコイン型電池１１Ｂのように、第１めっき部２２を２つ有するものとし、それらを角部Ｃ２，Ｃ３に配置する態様としてもよい。ちなみに、これらの場合における「第１めっき部２２の面積Ｓ１」とは、２つある第１めっき部２２の面積Ｓ１の総和を意味する。面積比Ｓｒ（＝Ｓ１／Ｓ２）の値は、上記実施形態と同様に１．５以上３．０以下に設定される。 In the above embodiment, the first tab terminal 21 has only one first plating part 22, and the first plating part 22 has a second rotation angle with respect to the center O <b> 1 of the coin-type battery 12. Although it arrange | positioned at the corner | angular part C2 of the positional relationship which makes 90 degrees with the corner | angular part C1 in which the plating part 32 is arrange | positioned, it is not limited to this. For example, it is good also as an aspect which shall have two 1st plating parts 22 and arrange them in corner | angular part C2, C4 like the coin type battery 11A with a terminal of another embodiment shown in FIG. Or it is good also as an aspect which shall have two 1st plating parts 22 and arrange them in corner | angular part C2, C3 like the coin-type battery 11B with a terminal of another embodiment shown in FIG. Incidentally, “the area S1 of the first plating part 22” in these cases means the sum of the areas S1 of the two first plating parts 22. The value of the area ratio Sr (= S1 / S2) is set to 1.5 or more and 3.0 or less similarly to the above embodiment.
　・上記実施形態では、第１めっき部２２及び第２めっき部３２は、スズめっきからなるものとしたが、スズめっき以外のめっき（例えば金めっき、ニッケルめっき等）を選択してもよい。即ち、端子形成材料である金属板のはんだ濡れ性を改善しうる導電性金属のめっきであれば、適宜選択することが可能である。 In the above embodiment, the first plating part 22 and the second plating part 32 are made of tin plating, but plating other than tin plating (for example, gold plating, nickel plating, etc.) may be selected. That is, any conductive metal plating that can improve the solder wettability of the metal plate as the terminal forming material can be selected as appropriate.
　・上記実施形態では、第１極を負極１３としかつ第２極を正極１４とした電気化学デバイスを用いて端子付き電気化学デバイスを構成したが、第１極を正極１４としかつ第２極を負極１３としたものを用いてもよい。 In the above embodiment, the electrochemical device with a terminal is configured using an electrochemical device in which the first electrode is the negative electrode 13 and the second electrode is the positive electrode 14, but the first electrode is the positive electrode 14 and the second electrode is What was used as the negative electrode 13 may be used.
　・上記実施形態では、本発明の端子付き電気化学デバイスを端子付きコイン型電池１１として具体化したが、例えば端子付きコイン型キャパシタ等に具体化しても勿論よい。 In the above embodiment, the electrochemical device with a terminal of the present invention is embodied as the coin-type battery 11 with a terminal, but it may of course be embodied in a coin-type capacitor with a terminal, for example.
　次に、特許請求の範囲に記載された技術的思想のほかに、前述した各実施の形態によって把握される技術的思想を以下に列挙する。 Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the respective embodiments described above are listed below.
　（１）手段１乃至５のいずれか１項において、前記電気化学デバイスはコイン型電池またはコイン型キャパシタであること。 (1) In any one of the means 1 to 5, the electrochemical device is a coin-type battery or a coin-type capacitor.
　（２）手段１乃至５のいずれか１項において、前記第１めっき部及び前記第２めっき部は、スズめっきからなること。 (2) In any one of the means 1 to 5, the first plating part and the second plating part are made of tin plating.
　（３）手段１乃至５のいずれか１項において、前記第１ランド及び前記第２ランドは、前記領域と同等の大きさ及び形状のランドエリア内に配置されていること。 (3) In any one of the means 1 to 5, the first land and the second land are arranged in a land area having the same size and shape as the area.
　（４）手段１乃至５のいずれか１項において、前記第２ランドは二等辺三角形状であり、前記第１ランドは前記第２ランドよりも面積の大きい矩形状であること。 (4) In any one of the means 1 to 5, the second land has an isosceles triangle shape, and the first land has a rectangular shape having a larger area than the second land.
　（５）手段１乃至５のいずれか１項において、前記第１タブ端子及び前記第２タブ端子は、予備はんだが施された前記第１ランド及び前記第２ランド上に配置された状態ではんだリフローを行うことにより接合されたものであること。 (5) In any one of the means 1 to 5, the first tab terminal and the second tab terminal are soldered in a state where they are arranged on the first land and the second land on which preliminary soldering is performed. It must have been joined by reflow.
　１…回路基板
　２…第２ランド
　３…第１ランド
　１１，１１Ａ，１１Ｂ…端子付き電気化学デバイスとしての端子付きコイン型電池
　１２…電気化学デバイスとしてのコイン型電池
　１３…第１極としての負極
　１４…第２極としての正極
　２１…第１タブ端子
　２２…第１めっき部
　３１…第２タブ端子
　３２…第２めっき部
　４１…仮想矩形
　Ｃ１，Ｃ２，Ｃ３，Ｃ４…角部
　Ｌ１…仮想矩形の一辺の長さ
　Ｏ１…（コイン型電池の）中心
　Ｓ１…第１めっき部の面積
　Ｓ２…第２めっき部の面積
　Ｓｒ…（面積）比
　Ｗ１…第１めっき部が形成された端部の幅 DESCRIPTION OF SYMBOLS 1 ... Circuit board 2 ... 2nd land 3 ... 1st land 11, 11A, 11B ... Coin type battery with a terminal as an electrochemical device with a terminal 12 ... Coin type battery as an electrochemical device 13 ... Negative electrode as a 1st pole DESCRIPTION OF SYMBOLS 14 ... Positive electrode as 2nd pole 21 ... 1st tab terminal 22 ... 1st plating part 31 ... 2nd tab terminal 32 ... 2nd plating part 41 ... Virtual rectangle C1, C2, C3, C4 ... Corner | angular part L1 ... Virtual rectangle The length of one side O1 ... the center of the coin-type battery S1 ... the area of the first plating part S2 ... the area of the second plating part Sr ... (area) ratio W1 ... the width of the end where the first plating part is formed

Claims (5)

  1. 　第１ランド及び第２ランドを有する回路基板上に表面実装される端子付き電気化学デバイスであって、
    　前記回路基板側に配置される第１極及び前記第１極の反対側にある第２極を有する円形状の電気化学デバイスと、
    　前記第１極に接合され、前記第１ランドにはんだ付けされる第１めっき部を端部に有する第１タブ端子と、
    　前記第２極に接合され、前記第１めっき部と同一面上に端部が位置するように折り曲げ形成され、前記第２ランドにはんだ付けされる第２めっき部を前記端部に有する第２タブ端子と
    を備え、円形状の前記電気化学デバイスに外接する仮想矩形の領域内に前記第１タブ端子及び前記第２タブ端子が配置され、前記第２めっき部が前記領域における４つの角部のうちの１つに配置され、前記第１めっき部が他の３つの角部のうちの少なくとも１つに配置され、前記第１極側から見たときの前記第２めっき部の面積に対する前記第１めっき部の面積の比が１．５以上３．０以下であることを特徴とする端子付き電気化学デバイス。     A terminal-attached electrochemical device mounted on a circuit board having a first land and a second land,
    A circular electrochemical device having a first pole disposed on the circuit board side and a second pole on the opposite side of the first pole;
    A first tab terminal having a first plating portion bonded to the first pole and soldered to the first land at an end;
    The second electrode is joined to the second electrode, is bent so that the end is located on the same plane as the first plated part, and has a second plated part soldered to the second land at the end. A tab terminal, the first tab terminal and the second tab terminal are disposed in a virtual rectangular region circumscribing the circular electrochemical device, and the second plating portion is provided at four corners in the region. The first plated portion is disposed at at least one of the other three corners, and the area relative to the area of the second plated portion when viewed from the first pole side. An electrochemical device with a terminal, wherein the ratio of the area of the first plating part is 1.5 or more and 3.0 or less.
  2. 　前記第１タブ端子は前記第１めっき部を１つのみ有するとともに、前記第１めっき部は、前記コイン型電池の中心を基準としたときの回転角が、前記第２めっき部が配置された角部と９０°をなす位置関係の角部に配置されていることを特徴とする請求項１に記載の端子付き電気化学デバイス。 The first tab terminal has only one first plating part, and the first plating part has a rotation angle with respect to the center of the coin-type battery, and the second plating part is arranged. 2. The electrochemical device with a terminal according to claim 1, wherein the electrochemical device is disposed at a corner portion having a positional relationship of 90 ° with the corner portion.
  3. 　前記第１タブ端子において前記第１めっき部が形成された端部の幅は、前記仮想矩形の一辺の長さの０．４倍未満であることを特徴とする請求項１または２に記載の端子付き電気化学デバイス。 3. The width according to claim 1, wherein a width of an end portion of the first tab terminal where the first plating portion is formed is less than 0.4 times a length of one side of the virtual rectangle. Electrochemical device with terminals.
  4. 　前記第１タブ端子は、厚さ方向に段差を有しない平板状であって、かつ平面視で略Ｌ字状に形成されていることを特徴とする請求項１乃至３のいずれか１項に記載の端子付き電気化学デバイス。 The said 1st tab terminal is flat form which does not have a level | step difference in the thickness direction, Comprising: It is substantially L-shaped by planar view, The one of Claim 1 thru | or 3 characterized by the above-mentioned. Electrochemical device with terminal as described.
  5. 　前記第１タブ端子は、前記第１めっき部が形成された端部から反対側の端部に行くに従って屈曲するごとに段階的に幅広になっていることを特徴とする請求項４に記載の端子付き電気化学デバイス。 The said 1st tab terminal is gradually widened whenever it bends as it goes to the edge part on the opposite side from the edge part in which the said 1st plating part was formed, It is characterized by the above-mentioned. Electrochemical device with terminals.
PCT/JP2012/053899 2011-03-28 2012-02-13 Terminal-equipped electrochemical device WO2012132618A1 (en)

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Publication number Priority date Publication date Assignee Title
WO2022196358A1 (en) * 2021-03-16 2022-09-22 セイコーインスツル株式会社 Terminal-equipped button cell

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Publication number Priority date Publication date Assignee Title
JP2002298804A (en) * 2001-03-30 2002-10-11 Sanyo Electric Co Ltd Coin type electric element and printed circuit board mounted with the coin type electric element
WO2003030281A1 (en) * 2001-09-28 2003-04-10 Kanebo, Limited Electrochemical cell with terminals
JP2004319310A (en) * 2003-04-17 2004-11-11 Sii Micro Parts Ltd Electrochemical cell
JP2010251782A (en) * 2010-06-14 2010-11-04 Seiko Instruments Inc Electrochemical cell with lead terminal

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Publication number Priority date Publication date Assignee Title
JP2002298804A (en) * 2001-03-30 2002-10-11 Sanyo Electric Co Ltd Coin type electric element and printed circuit board mounted with the coin type electric element
WO2003030281A1 (en) * 2001-09-28 2003-04-10 Kanebo, Limited Electrochemical cell with terminals
JP2004319310A (en) * 2003-04-17 2004-11-11 Sii Micro Parts Ltd Electrochemical cell
JP2010251782A (en) * 2010-06-14 2010-11-04 Seiko Instruments Inc Electrochemical cell with lead terminal

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022196358A1 (en) * 2021-03-16 2022-09-22 セイコーインスツル株式会社 Terminal-equipped button cell

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