JP4721766B2 - Thin battery for card - Google Patents

Description

The present invention relates to a thin battery that is suitable for built-in card.

For example, many of the non-contact type IC cards that have become widespread in recent years use an electromotive force due to electromagnetic induction, but there is an attempt to provide a built-in power source in order to achieve multiple functions. The batteries disclosed in the following Patent Documents 1 and 2 are called paper batteries, and demand for IC cards and active RFIDs is expected to increase.
Japanese Patent No. 2935427 JP-A-8-055627

  Conventionally, when the expiration date of a magnetic card has come, the user cuts the magnetic card with scissors and discards it as an incombustible material. On the other hand, a method of collecting IC cards by vendors (issuers) is becoming common. However, it is considered that there are users who cut and discard with scissors like a magnetic card.

  In the case of a card that does not have a built-in power supply, except for the problem of information leakage, there may be no significant problem with cutting and discarding with scissors. However, in the case of a battery built-in card, there is a risk that the battery will be cut off together with the card. Even if collection by a trader becomes common, it is impossible to completely deny the existence of a user who cuts with scissors. Therefore, the safety measures for the battery built-in card are not enough.

  In addition, there is a case where an object with a built-in battery does not contain important personal information like a birthday card with an audio playback function. In the case of such a card, the user may easily cut and discard it easily.

An object of the present invention is to provide disposal measures and disconnection countermeasure is applied, a thin battery which is suitable for built-in card.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-mentioned problems, a battery built-in card that is a premise of the present invention is a thin battery, a card body composed of a plurality of sheet-like parts supported by sandwiching the thin battery, and the thin battery inside the card body. Te comprises a cutting blocking member which prevents thin battery is cut together when cutting the card body.

The above premise is that the strength of the built-in portion of the thin battery is strengthened with a cutting obstruction member, and according to this, when cutting the card body with a cutting instrument such as scissors or a cutter, When the blade approaches, at least the blade of the cutting instrument is difficult to advance. As a result, it is possible to appeal to the user that the portion containing the thin battery must not be cut. Moreover, when the cutting obstructing member has an appropriate hardness, it is possible to sufficiently prevent a supervisor such as a child from cutting accidentally.

  In a preferred embodiment, the above-described cutting obstructing member can be disposed between the outer peripheral edge of the card body and the thin battery. In this way, the blade of the cutting tool always comes into contact with the cutting obstruction member before reaching the thin battery. If the cutting device does not proceed smoothly, the user will give up or give up the card cutting operation.

  Further, the cutting obstructing member can be in the form of a frame that encloses the thin battery in the card body, or in the form of a frame that is partially or entirely overlapped with the outer peripheral portion of the thin battery. In this way, regardless of the direction around the thin battery, the cutting tool blade always comes into contact with the cutting obstructing member before reaching the thin battery.

  By the way, the cutting obstruction member as described above can be regarded as a part incorporated in the card body at the time of manufacturing the card, or can be regarded as one part constituting the thin battery. That is, in order to solve the problem, the card thin battery according to the present invention includes a battery main body portion including an element that brings about a power generation action, and is thinner than the battery main body portion, and is formed around the battery main body portion. The main features include a seal portion that maintains airtightness in the main body portion, and a cutting obstruction member that is attached to the seal portion and increases the difficulty of cutting the seal portion.

In another aspect, a battery built-in card as a reference example includes a thin battery and a card body formed of a plurality of sheet-like parts that are supported with the thin battery interposed therebetween, and the portion where the thin battery is disposed Avoid marking on the card body . By applying such a marking to the card body, a location suitable for cutting can be directly shown to the user.

  Specifically, the marking described above may be an emboss formed over a side facing from one side of the card body or formed over another side adjacent to one side. If the card can be easily broken along the emboss, the user does not bother to cut the card with a cutting tool such as scissors. As a result, the built-in portion of the thin battery can be prevented from being cut by a cutting tool such as scissors.

In another aspect, a battery built-in card as a reference example is connected to a thin battery, a card body composed of a plurality of sheet-like parts that are supported by sandwiching the thin battery, and connected to the thin battery in the card body. And a discharge circuit portion that promotes discharge of the thin battery on condition that the predetermined position of the main body is cut or broken .

According to the battery internal cards, cards when a spent, the discharge circuit to function it is possible to consume the residual power of the thin battery. For example, by slightly cutting the corners of the card, the card usage state that suppresses the self-discharge of the thin battery is changed from the card use state in which the self-discharge of the thin battery is higher than the card use state, The discharge circuit unit can be configured. In this way, the user can speed up the complete discharge of the thin battery without being aware of the existence of the discharge circuit section.

For example, in the case of a lithium primary battery using metallic lithium as the negative electrode active material, a safety concern is that lithium that is an alkali metal reacts with water to produce lithium hydroxide that is a strong alkali. If strong alkali gets into your eyes, your eyes may be deadly damaged. However, if lithium in the negative electrode is completely consumed, generation of lithium hydroxide due to reaction between lithium and water can be prevented. Lithium primary battery, not only the self-discharge is left simply because very small, it is preferable to discharge actively when no longer needed. If it is in a completely discharged state, it is possible to ensure sufficient safety when it is discarded as an incombustible material.

  Moreover, the following battery built-in card | curd can be proposed with respect to the problem of the information leakage at the time of card discard. The battery built-in card includes a thin battery, a card body, recording means for receiving power from the thin battery in the card body and accessing information from outside the battery built-in card, and a card And an information erasing unit for erasing information recorded in the recording unit while receiving power from the thin battery on condition that a predetermined position of the main body is cut. According to such a battery built-in card, it is possible to delete the information recorded in the recording means by an extremely simple procedure of cutting a part of the card and then discard it. Excellent convenience.

  In this specification, the term “card” refers to not only an information recording medium such as a credit card or a cash card, but also a card that does not have an IC chip, such as a magnetic card, and a paper card such as a postcard or a photo. Used in a broad sense, including cards and cards with shapes other than squares. That is, unless otherwise specified, “card” = “thin plate or sheet”. Further, it is assumed that the “card” can be cut using scissors or a cutter.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a block diagram of an IC card which is an embodiment of a battery built-in card as a premise of the present invention. The IC card 100 includes a thin battery 1 </ b> A, an IC module 17, and a display unit 19. The IC module 17 is obtained by modularizing electronic components such as an IC chip. The thin battery 1A is, for example, a lithium primary battery, and supplies power to the IC module 17 and the display unit 19. Further, the IC card 100 can be configured as a non-contact type information recording medium by providing an antenna coil unit (not shown) for transmitting and receiving data by wireless communication.

  FIG. 2 is an exploded perspective view of the IC card 100 of FIG. The IC card 100 includes a card body 39 in which sheet-like component groups including a first oversheet 31, a core sheet 33, an inner sheet 35, and a second oversheet 37 are stacked in this order. In the present embodiment, a four-layer product is used, but a five-layer product in which an inner sheet is further sandwiched between the first oversheet 31 and the core sheet 33 may be used. A cavity 33 a for accommodating the thin battery 1 </ b> A and the cutting obstruction member 15 is formed inside the card body 39 by cutting a part of the core sheet 33. The cutting obstruction member 15 serves to prevent the thin battery 1A from being cut together when the card body 39 is cut.

  FIG. 3 is a transverse sectional view of the IC card 100, and FIG. 4 is a longitudinal sectional view. As shown in FIGS. 3 and 4, the cutting obstruction member 15 is disposed in the rectangular cavity 33 a in plan view together with the thin battery 1 </ b> A. The cutting obstruction member 15 is a sheet-like component having a frame shape with a size surrounding the thin battery 1A. By encircling the entire circumference of the thin battery 1A with the cutting obstruction member 15, even if the scissors are inserted from any direction of the card main body 39, the cutting obstruction member 15 is surely attached to the cutting obstruction member 15 before reaching the thin battery 1A. The blade enters. As a result, the thin battery 1A can be prevented from being cut smoothly. The thin battery 1A and the cutting obstruction member 15 are fixed to the inner sheet 35 with an adhesive. The lead terminals 6t and 7t of the thin battery 1A are connected to circuit terminals (not shown) mounted on the inner sheet 35.

  In the embodiment shown in FIGS. 3 and 4, the cutting obstruction member 15 and the thin battery 1 </ b> A are arranged so as not to overlap, but the inner peripheral portion of the cutting obstruction member 15 overlaps the outer peripheral portion of the thin battery 1 </ b> A. Also good.

  As resin materials constituting the oversheets 31 and 37, the core sheet 33 and the inner sheet 35 of the card body 39, PVC (polyvinyl chloride), PET-G (registered trademark of Eastman Chemical Co., USA), biodegradable resin, A thermoplastic resin such as PET (polyethylene terephthalate) can be suitably used. PVC is a resin that can be heat-sealed at 140 ° C. to 150 ° C. and is generally used as a card substrate. PET-G is an amorphous polyester resin that can be heat-sealed like PVC. It has many advantageous features such as a melting temperature of 120 ° C. to 130 ° C., which is lower than PVC, excellent bending / twisting durability, and clean combustion product gas. The biodegradable resin has a fusion temperature of 130 to 140 ° C. and a relatively low temperature, but does not generate harmful gases during the incineration process, like PET-G. Furthermore, since it is decomposed into water and carbon dioxide by the action of microorganisms, landfill treatment is possible. Since PET, which is a crystalline resin, does not have heat-fusibility, it is necessary to use an adhesive such as a hot-melt adhesive. Specifically, a thin hot melt adhesive layer formed on one or both sides of a PET sheet can be used. As the hot-melt adhesive, an adhesive mainly composed of a thermoplastic resin such as polyvinyl acetate, an acrylic resin, or an ethylene-vinyl acetate copolymer can be used. In addition, additives, such as a pigment and a flame retardant, can be appropriately added to the resins shown above and used.

  On the other hand, as a material which comprises the cutting | disconnection obstruction | occlusion member 15, moderate softness | flexibility can be ensured and it is desirable from a viewpoint which makes scissors and the cutter blade difficult to enter. Specifically, fluorine resin, phenol resin, polycarbonate resin, high density polyethylene resin, polypropylene resin, acrylonitrile / butadiene / styrene resin (ABS resin), methacryl resin, acetal resin, polyamide resin, epoxy resin, polyphenylene sulfide resin, and polyimide A kind of resin selected from the group consisting of resins can be used as the material of the cutting blocking member 15. Or the composite resin containing 2 or more types of resin selected from the said group can be used.

  In addition, one or two or more kinds of reinforcing materials (fillers) selected from the group of glass, carbon (DLC, etc.), metal, ceramic (alumina ceramic, silicon nitride ceramic, silicon carbide ceramic, etc.) and aramid fiber are used as a resin base material. A reinforced plastic contained therein can be suitably used. A plastic material in which the above reinforcing material is fixed on the surface of the resin base material can be used. Moreover, single metals, such as copper, aluminum, titanium, and nickel, or alloys, such as various stainless steels, can be used. Furthermore, one type or two or more types of high-strength fibers selected from the group of boron fibers, silicon carbide fibers, and alumina fibers can be used. For the purpose of preventing scissors and the cutting edge of the cutter from entering, the cutting obstruction member 15 is harder than the resin material constituting the oversheets 31 and 37, the core sheet 33 and the inner sheet 35 of the card body 39 (for example, Vickers hardness). It is desirable to be composed of the material of Since the above-mentioned reinforced plastic, metal and high-strength fiber satisfy such a demand, it is particularly recommended to use them within a range that does not greatly impair the flexibility of the thin battery 1A.

  For the purpose of preventing scissors and the cutting edge of the cutter from entering, it is desirable that the width of the cutting obstruction member 15 is 3.0 mm or more. Since there is a problem of space in the card, it is preferable to keep the width to 10 mm or less. For example, in the case of an IC card defined in ISO / IEC7810, the thickness is about 0.76 mm. In addition, not only ISO cards but also cards that are distributed daily have a thickness of 1.0 mm or less. Therefore, it is desirable to adjust the thickness of the cutting obstruction member 15 to 0.3 mm or more and 0.5 mm or less from the viewpoint of not deteriorating the aesthetic appearance of the card.

  Further, as shown in FIG. 4, in the present embodiment, the thickness of the cutting obstruction member 15 is adjusted to be approximately equal to the maximum thickness of the thin battery 1A. In the thin battery 1A, the central portion having the maximum thickness may be more convex than the outer peripheral portion. When the thin battery 1A having such a configuration is built in a card, a load is easily applied to the convex center portion. As in this embodiment, by making the height of the cutting obstruction member 15 in the cavity 33a coincide with the height of the thin battery 1A, the concentration of the load on the thin battery 1A can be reduced.

  Further, in place of the frame-shaped cutting obstruction member 15, a plurality of small pieces of cutting obstruction members 151 are arranged in the cavity 33a (in the card body 33) in the form of being scattered around the thin battery 1A as shown in FIG. Is possible. According to such a cutting obstruction member 151, even when a material having high rigidity such as metal or ceramic is used for the cutting obstruction member 151, the flexibility of the IC card 100 can be sufficiently maintained. It is. Of course, the frame-shaped cutting blocking member 15 and the dotted cutting blocking member 151 may be used in combination.

  Next, the thin battery 1A will be described. FIG. 6 is a cross-sectional view of a lithium primary battery 1A that is a thin battery 1A. The lithium primary battery 1A is square and plate-like as a whole, and includes frame members 2 and 3 as a sealing material, a positive electrode active material layer 4, a positive electrode current collector 6, a negative electrode active material layer 5, a negative electrode current collector 7, and a separator. 9 is provided. The positive electrode current collector 6 and the negative electrode current collector 7 are fixed to the frame members 2 and 3 so as to close the openings of the frame members 2 and 3 as seal materials, respectively, and also serve as an exterior material of the lithium primary battery 1A. . Each of the positive electrode current collector 6 and the negative electrode current collector 7 is integrally formed with a strip-shaped lead terminal (see FIG. 3) as a power extraction portion.

  The frame members 2 and 3 include a positive electrode side frame member 2 and a negative electrode side frame member 3. The positive electrode side frame member 2 and the negative electrode side frame member 3 are bonded to each other on the facing surfaces. An active material filling chamber 10 is formed by the frame members 2 and 3, the positive electrode current collector 6 and the negative electrode current collector 7, and the separator 9, the positive electrode active material layer 4 and the negative electrode active material layer 5 are accommodated in the active material filling chamber 10. As a result, the battery body 14 is formed. Further, the positive electrode current collector 6 is bonded to the positive electrode side frame member 2 and the negative electrode current collector 7 is bonded to the negative electrode side frame member 3 so as to be located on the side opposite to the separator 9. Thereby, the seal part 11 which maintains the airtightness of the battery main body part 14 is formed. By fixing the peripheral edge portion 9k of the separator 9 to the negative electrode side frame member 3, the active material filling chamber 10 is divided into a positive electrode side where the positive electrode active material layer 4 is arranged and a negative electrode side where the negative electrode active material layer 5 is arranged. It is divided. In the active material filling chamber 10, the positive electrode active material layer 4 is held between the positive electrode current collector 6 and the separator 9, and the negative electrode active material layer 5 is held between the negative electrode current collector 7 and the separator 9. Yes. With such a structure, the current collectors 6 and 7 can also be used as an exterior material of the lithium primary battery 1A.

  As can be understood from FIG. 6, the battery main body 14 has a shape raised in a plateau shape. Since the thickness of the battery main body portion 14 and the thickness of the seal portion 11 are different, a step is formed in the outer peripheral portion of the battery main body portion 14 adjacent to the seal portion 11.

  Also, the lithium primary battery 1B having the structure shown in FIG. The lithium primary battery 1 </ b> B as a thin battery includes a cell 22 that is a power generation element, and laminate exterior materials 28 and 29 that package the cell 22, and has a rectangular and plate shape as a whole. The cell 22 and the laminate exterior materials 28 and 29 form a battery main body 24 that is a raised portion on a plateau. In addition, the first laminate outer material 28 covering one main surface side of the cell 22 and the second laminate outer material 29 covering the other main surface side are directly coupled around the battery main body 24, and the seal portion 21. Is forming. The cell 22 has a sheet-like form, and is a power generation element in which the positive electrode current collector 26, the positive electrode active material layer 4, the separator 9, the negative electrode active material layer 5, and the negative electrode current collector 27 are laminated in this order. The positive electrode active material layer 4 and the positive electrode current collector 26 constitute a positive electrode, and the negative electrode active material layer 5 and the negative electrode current collector 27 constitute a negative electrode facing the positive electrode through the separator 9.

The lithium primary batteries 1A and 1B described above can be used for assembling the IC card 100 with the cutting obstruction member attached in advance. FIG. 8 is a perspective view of a lithium primary battery 10A to which the cutting obstruction member 25 according to the present invention is attached. The lithium primary battery 10A is obtained by bonding and fixing a cutting obstruction member 25 to the seal portions 11 and 21 of the lithium primary batteries 1A and 1B described with reference to FIGS. By reinforcing with the cutting obstruction member 25, it becomes difficult for the blade to enter the seal portions 11 and 21 reliably. In some cases, the blade will not enter with some force. In addition, about the raw material etc. which comprise the cutting | disconnection obstruction member 25, it is as having demonstrated previously.

  FIG. 9 is a schematic diagram in which the BB cross section of FIG. 8 is partially enlarged. As described with reference to FIGS. 6 and 7, the seal portions 11 and 21 are formed thinner than the battery main body portions 14 and 24. The cutting obstruction member 25 is disposed on the seal portions 11 and 21 on the main surface side where a step is formed based on the difference between the thickness of the seal portions 11 and 21 and the thickness of the battery main body portions 14 and 24. . By adopting this arrangement, the card body 39 (FIG. 5) can be obtained without increasing or almost increasing the maximum thickness of the battery body portions 14 and 24, and hence the maximum thickness of the lithium primary batteries 1A and 1B. An effect of preventing the thin batteries 1A and 1B from being cut together at the time of cutting 1) can be obtained.

  Further, when the thickness (maximum thickness) of the battery main body portions 14 and 24 is D1, and the total thickness of the seal portions 11 and 21 and the thickness of the cutting obstruction member 25 is D2, in the embodiment of FIG. D1 <D2. The thin battery 10A can be cut smoothly by adjusting the relative thicknesses of the seal parts 11 and 21, the battery body parts 14 and 24, and the cutting obstruction member 25 so as to satisfy such a relationship. Both the effect of preventing the load from being applied and the effect of preventing the load from concentrating on the battery body portions 14 and 24 when the thin battery 10A is accommodated in the card body 39 and the card body 39 is pressurized are obtained. be able to. These effects can be obtained to the same extent even when D1 = D2. Even when D1> D2, the effect of preventing the thin battery 10A from being smoothly cut is sufficiently obtained. The effect of preventing the load from concentrating on the battery main body parts 14 and 24 is not necessarily obtained, and the effect is only small.

  Further, as shown in FIG. 10, a cutting obstruction member 251 having a frame shape that protrudes outward from the seal portions 11 and 21 can be attached to the seal portions 11 and 21. A part of the cutting obstruction member 251 is located on the seal portions 11 and 21, and the remaining portion is located outside the seal portions 11 and 21. Further, by bonding the sheet-like component to the seal portions 11 and 21 as the cutting obstruction member 251, the cut obstruction member 251 having an L-shaped cross section along the seal portions 11 and 21 is relatively easy as shown in FIG. 10. Can be formed.

  As described above, when the cutting obstruction member 251 protrudes from the seal portions 11 and 21, even if the blade of a cutting instrument such as scissors arrives from the in-plane direction, the blade is positioned before the seal portions 11 and 21. It always hits the cutting obstruction member 251. As a result, an effect of preventing the thin battery 10A from being cut smoothly can be obtained. Such an effect is the same as that of the cutting obstruction member 15 demonstrated in FIGS. Further, according to the embodiment of FIG. 10, since the seal portions 11 and 21 and the cutting obstruction member 251 are in close contact with each other, there is an advantage that a dead space is hardly generated. The “in-plane direction” means a direction parallel to the main surface (widest surface) of the thin battery 10A.

  In the above description, the function of the card is not particularly mentioned, but the card with the function of emitting light and sound, the card with the display, the card with the IC, or the card having a plurality of functions are combined. The gist of the present invention can be applied to various cards. Moreover, it is good also considering the lithium ion secondary battery which followed the basic structure of lithium primary battery 1A, 1B as a thin battery for card | curd incorporation.

(Reference example)
The battery built-in card shown in FIG. 11 is an IC card 101 that is marked to avoid the built-in portion of the thin battery 1A. The marking 51 plays a role of notifying the user that the thin battery 1A is built in the IC card 101 and calling attention to avoid cutting the built-in portion of the thin battery 1A. In the embodiment of FIG. 11, the marking 51 is a printed portion marked on the card surface so as to be visible. Further, the marking 51 can be formed from one side of the IC card 101 having a square shape in plan view to the opposite side. When the IC card 101 is cut along the marking 51, the cutting tool blade is not applied to the thin battery 1A, which is safe.

  FIG. 12 is a perspective view of the IC card 102 on which the emboss is formed. As in the embodiment described with reference to FIG. 11, the emboss 53 that plays a role as a marking is formed in a form straddling two opposing sides. According to such an emboss 53, the user can bend the used IC card 102 along the emboss 53 and safely cut it. In addition, it is possible to collect only the thin battery 1A in a state where safety against information leakage is enhanced. Such an effect can be similarly obtained with the IC card 101 of FIG. Furthermore, it is possible to adopt a disposal form in which the part in which the IC module 17 is built in and the part in which the thin battery 1A is built up are separated and collected individually. Instead of the emboss 53, a through hole that functions as a marking together with the emboss 53 may be formed. The through holes formed in rows and columns of the IC card 102 help the IC card 102 to be safely cut, like the emboss 53.

(Reference example)
FIG. 13 is a block diagram of another embodiment of a battery built-in card. As shown in FIG. 13, the IC card 200 as a battery built-in card includes a thin battery 1 </ b> A, an IC module 17, a display unit 19, and a discharge circuit unit 41. The discharge circuit unit 41 provides a function of forcibly completely discharging the thin battery 1A when the IC card 200 is used.

  FIG. 14 is a circuit diagram of the discharge circuit section 41 shown in FIG. The discharge circuit unit 41 includes a series resistance by a resistor R1 and a resistor R2 in parallel with a device (load) such as an IC module connected to the thin battery 1A, and a resistor R3 that can be turned on / off by the FET 43. Has an inserted circuit configuration. One end of the resistor R3 is connected to the power source (the positive terminal of the thin battery 1A), and the other end is connected to the source of the FET 43. The drain of the FET 43 is grounded (the negative electrode side terminal of the thin battery 1A).

  In a state where the capacity of the thin battery 1A remains sufficiently, the potential at the midpoint A of the resistors R1 and R2 drives the gate of the FET 43. The source and drain of the FET 43 are cut off, and the electric power of the thin battery 1A flows almost to the device side. On the other hand, when the pattern cut portion shown in the circuit diagram is cut, the gate of the FET 43 is turned off, the source and drain of the FET 43 are conducted, and the resistor R3 starts to consume power. By appropriately adjusting the sizes of the resistors R1, R2 and R3, the discharge of the thin battery 1A in the state of using the card where the pattern cut portions are connected is suppressed as much as possible, while the card is used where the pattern cut portions are cut. It is possible to increase the power consumption in the used state compared to the state when the card is used, and promote the discharge of the thin battery 1A.

  For example, as shown in FIG. 15, the wiring pattern 41 c of the discharge circuit unit 41 can be devised so that the corner of the IC card 200 is broken to break at the pattern cutting portion. Furthermore, by forming the markings described in the second embodiment at the corners of the IC card 200, the user can break the corners of the IC card 200 that are no longer needed, and promote the discharge of the thin battery 1A. Can do. Moreover, you may make it cut | disconnect in a pattern cutting | disconnection location by cutting in a part of IC card 200 with cutting tools, such as scissors. The position of cutting with scissors or the like can be marked by marking. Further, when the thin battery 1A has a small capacity (for example, 50 mAh or less), there is no problem even if the resistor R3 is omitted and the positive electrode and the negative electrode of the thin battery 1A are short-circuited via the FET 43.

  Further, it is possible to propose an IC card 201 that can execute a program for erasing information recorded in the IC module 17 on condition that the pattern cutting portion is cut. Specifically, as shown in FIG. 16, for example, the voltage monitoring circuit unit 431 constantly monitors, for example, the gate voltage of the FET 43 (point A voltage in FIG. 14). The voltage monitoring circuit unit 431 inputs the monitored voltage value or its level to the IC module 17. When a predetermined portion of the card is cut or the like and a disconnection occurs at the pattern cut portion, the gate voltage of the FET 43 decreases. Based on the input from the voltage monitoring circuit unit 431, the IC module 17 detects the disconnection, starts an information erasing program (corresponding to information erasing means), and erases personal information recorded in its own memory. To do. Even during execution of this program, the IC module 17 receives power from the thin battery 1A. By giving such a function to the IC card 201, it is possible to solve the problem of information leakage at the time of card disposal together with the problem of the remaining power of the battery.

  Of course, not only lithium primary batteries but also other types of batteries such as lithium ion secondary batteries can be used for the thin battery 1A built in the IC card 200.

The block diagram of the IC card which is one Embodiment of the battery built-in card | curd which is a premise of this invention. The disassembled perspective view of the IC card of FIG. FIG. 2 is a cross-sectional view of the IC card in FIG. 1. The longitudinal cross-sectional view of the IC card of FIG. The plane schematic diagram which shows the modification of a cutting | disconnection obstruction member. Sectional drawing of a thin battery. Sectional drawing of another one thin battery. The perspective view of the thin battery of this invention. The partial cross section schematic diagram of the thin battery of FIG. The plane schematic diagram which shows the modification of a cutting | disconnection obstruction member. The perspective view of the other reference example of a battery built-in card. The perspective view of the other reference example of a battery built-in card | curd similarly. The block diagram of the IC card which is a battery built-in card of the reference example with which the measures against disposal and cutting were strengthened. FIG. 14 is a circuit diagram of the discharge circuit section shown in FIG. 13. Explanatory drawing of embodiment which makes a discharge circuit part function by cut | disconnecting the edge of a card | curd partially. FIG. 3 is a block diagram of an IC card having an information erasing function.

Claims (2)

A battery body (14) including elements (4, 5, 6, 7, 9) that provide power generation action;
A seal part (11) which is thinner than the battery body part (14) and which is formed around the battery body part (14) and maintains airtightness in the battery body part (14);
A cutting obstruction member (25) attached to the seal portion (11) to increase the difficulty of cutting the seal portion (11);
A thin battery for cards (10A), comprising: The maximum thickness of the battery main body (14) is D1, and the total thickness of the seal portion (11) and the cutting obstruction member (25) is D2, so that D1≤D2 is satisfied. Card thin battery (10A) .

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