JPH05166019A - Ic card - Google Patents

Abstract

PURPOSE:To provide an IC card which has its smaller thickness and lighter weight and higher function and then surely backs up a memory element as an IC memory card. CONSTITUTION:A substrate 6 of an IC card main body 2 is molded into a plate shape with the resin 7. A solid state polymer secondary battery 3 is used to the part 2 and attached to at least one of both sides of the part 2 in a single body with the part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card.

[0002]

2. Description of the Related Art In recent years, electronic devices have been remarkably reduced in size, thickness and weight. Especially in the field of OA equipment, there is a reduction in size from desktop type to laptop type to notebook type. It is progressing. Further, such miniaturization and weight reduction have been advanced to the field of new electronic devices such as electronic notebooks and electronic still cameras. Furthermore, in the field of such electronic devices, there is an increasing need for new compact memory media in addition to the miniaturization of conventional hard disks, floppy disks, etc., and as such memory media, cards, CPUs, RAM, An IC card, which has a built-in ROM and has information processing capability and storage capability, is drawing attention.

There are various kinds of IC cards, and the research subject is to increase the capacity and thickness of the memory element.

[0004]

By the way, among such various types of IC cards, an IC card (RAM mounting type) in which a memory element is rewritable has hitherto been used as a battery for backing up the memory element. A primary battery using an inorganic active material, specifically, a coin-type primary battery was used, and the primary battery was mounted on the same IC card substrate on which the memory element was mounted. In this case, it is very difficult to add a memory element or another functional element while maintaining the shape of the IC card, because the primary battery is mounted, so that Since the primary battery is mounted on the substrate, there is a limit to the reduction in thickness and weight of the IC card.
Further, as is well known, since the primary battery cannot be charged, it is necessary to replace it when it reaches the end of its life, but at the time of this replacement, the memory element is no longer supplied with backup power, There were also problems such as volatilization of the contents of the element.

The present invention is suitable for further reduction in thickness, weight and function, and when used as an IC memory card, an IC card using a battery capable of reliably backing up the memory element. Is intended to provide.

[0006]

FIG. 1 is an exploded perspective view showing a first embodiment of an IC card of the present invention. This first
The IC card 1 of the embodiment of
It has a sheet-shaped solid polymer secondary battery 3 arranged on at least one card surface of the IC card body 2. In the example of FIG. 1, the solid polymer secondary battery 3 is arranged only on one card surface 4 of the IC card body 2.

More specifically, the IC card body 2 is
The substrate 6 is molded into a plate shape by molding with the resin 7, and the solid polymer secondary battery 3 has the IC card body 2
And functions as a secondary battery for the IC card body 2, and is attached to at least one card surface of the IC card body 2 integrally with the IC card body 2, for example. Also, I
Although the resin layer on the integrated surface of the C card body 2 and the secondary battery is present in the drawing, the secondary battery also serves as an exterior material, and after the substrate 6 and the battery are laminated, the entire molding process is performed. It is a layer that does not exist when performing.

On the substrate 6 of the IC card body 2, pin terminals 10a to 10n for connecting the IC card to an electronic device (not shown), a control IC 11, a memory element 12 (eg, static RAM), etc. are mounted. When this IC card is attached to an electronic device, electric power is supplied from the electronic device side to the IC card body 2 via some of the pin terminals 10a to 10n, for example, 10n. ing. Further, this electric power is supplied to the power supply line 13 of the IC card body 2 and the electrical connection portion 1 between the IC card body 2 and the polymer secondary battery 3.
Is also supplied to the polymer secondary battery 3 via the polymer 2
The secondary battery 3 is charged. Further, in such a configuration, when the IC card is not attached to the electronic device, the electric power from the polymer secondary battery 3 is applied to the connection portion 1.
4 and the power supply line 13, the power is supplied to the control IC 11, the memory element 12, and the like. As can be seen from this, the polymer secondary battery 3 is not connected to the electronic device when the IC card main body is used. 3 functions as a memory backup power supply. Note that FIG. 1 is only a schematic diagram, and it goes without saying that the circuit configuration that considers the charging voltage and the IC driving voltage must be used for the power supply from the actual device to the battery and the backup from the battery to the memory element. Absent.

The size of the IC card body 2 is 85.6 ± 0 on the long side when it is manufactured based on the standard specification of IC card for personal computer (Japan Electronic Industry Development Association) Ver. 4, for example. 0.2 (mm), short side 54.0 ± 0.1
(Mm) and the thickness is 3.3 ± for Type I.
0.1 (mm), 5.0 for Type II
(Mm) or less. Currently, the thickness of a flat package type memory device for surface mounting is 0.9 to 1.1.
Since the thickness is about mm, when the memory device of this type is mounted on both sides to form the substrate 6, the thickness of the substrate 6 is about 2.5 mm.

FIG. 2 is a diagram showing an example of the construction of the power generating element 3 of a sheet-shaped polymer secondary battery, and a battery unit is obtained by sealing this with an exterior material. In the example of FIG. 2, the power generation element 3 of the sheet-shaped polymer secondary battery has an area similar to that of the IC card body 2 and has flexibility, and has a thickness of about 325 μm (exterior). (Including about 450 μm), an electric capacity of about 30 mAh can be taken out. Basically, a pair of positive electrode 31 and negative electrode 32, and a separator 3 for separating them.
3 and an electrolyte component 34.

The separator 33 is used as needed.

As the active material of the positive electrode 31, for example, pyrrole,
Hetero five-membered ring compound polymer containing thiophene etc. as a monomer, aromatic hydrocarbon compound polymer containing benzene, azulene etc. as a monomer, amine compound containing aniline, diphenylbenzidine etc. as a monomer A polymer or the like can be used.

These polymers are produced by oxidatively polymerizing monomers. Specific examples of the polymerization method of the monomer include a chemical polymerization method using an oxidation catalyst and an electrolytic polymerization method of electrochemical polymerization. As the oxidation catalyst used for chemical polymerization, aluminum chloride, aluminum bromide,
A Lewis acid such as iron chloride, molybdenum chloride, antimony chloride, or tungsten chloride used as a catalyst for the Friedel-Crafts reaction is used. It is carried out by adding it to the monomer or a solution containing the monomer. It

The electropolymerization method is generally described, for example, in the document "J. Electrochem. Soc., Vol. 130, No. 7, 1506 to 1509 (198).
3) '', the document `` Electochem.Acta., Vol.27, No. 1, 61-65 (19
82) '', the document `` J.Chem.Soc., Chem.Commun., 1199- (198).
4) '', etc., it can be carried out by putting a liquid in which a monomer and an electrolyte are dissolved in a solvent into a predetermined electrolytic cell, immersing the electrode, and causing an electrolytic polymerization reaction by anodic oxidation. it can.

According to the method of chemically polymerizing using an oxidation catalyst, a polymer is synthesized in a powder form, and therefore it is necessary to use a binder such as Teflon to form a sheet in order to form a sheet. is there. On the other hand, in the method of electrochemically polymerizing, the polymer is directly deposited on the electrode,
It can be used as an electrode of a battery as it is, and it is superior to the method of chemically polymerizing using an oxidation catalyst in that the film thickness can be easily controlled, and a thinner electrode can be uniformly manufactured. .. Therefore, in the present invention,
It is desirable to use electrodes made by the method of electrochemically polymerizing.

Among the various polymeric materials mentioned above, polyaniline is particularly preferred. That is, polyaniline is attracting attention as an electrode active material capable of forming a battery having a large discharge capacity and capable of extracting a large current, and a secondary battery having an excellent repeated charge / discharge life. Therefore, polyaniline is used as a positive electrode. A secondary battery with high energy density can be manufactured by using it as an active material.

Further, as the active material of the negative electrode 32, Li,
Metals such as Na, K, Ag, Zn, Al and Cu, or alloys of Li and Al, Mg, Si, Pb, Ga and In,
In addition to polyacetylene, polythiophene, and polyparaphenylene that can be doped with cations, conductive polymers such as polyphenylene vinylene and polyphenylene xylene can be mentioned, but thin and flexible materials are preferable, from the viewpoint of high voltage and high energy capacity. Li (lithium) is considered to be the most suitable.

The electrolyte component 34 used in the polymer secondary battery 3 is not a liquid electrolyte used in a normal battery but a solid electrolyte, and in particular, the solid electrolyte has a radical polymerizable property. A viscoelastic body is obtained by dissolving the compound in a non-aqueous electrolyte and polymerizing it in the presence of a polymerization initiator by heat or light irradiation. The solid electrolyte as a viscoelastic body thus produced has a sufficiently high ionic conductivity of the order of about 1/10 ³ at room temperature. In addition, this material is a viscoelastic material with a structure in which a non-aqueous electrolyte is dispersed in a high-molecular polymer, but even if it is deformed, the liquid does not ooze out and it is a perfect solid. It can be treated as a state. Therefore, it is possible to manufacture a highly reliable battery without fear of liquid leakage. In particular, it is extremely useful in a battery having a wide sealed portion such as a sheet battery.

The radical polymerizable compound preferably contains a hetero atom such as an oxygen atom, a nitrogen atom or a sulfur atom in its molecule. Particularly, a compound having an oxyethylene chain or an oxypropylene chain is preferable. These heteroatoms accelerate the ionization of the electrolyte salt and improve the ionic conductivity of the solid electrolyte. Examples of the radically polymerizable compound include methoxyethyl (meth) acrylate, ethoxyethyl (meth) acrylate, methoxydiethylene glycol (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, ethoxydiethylene glycol metadiacrylate, and furfuryl acrylate. Further, two or more kinds of them may be mixed and used as a mixture, and other compounds may be used without being limited thereto as long as the battery having the above-mentioned characteristics is obtained.

The radical polymerization is initiated by generating radicals from a polymerization initiator previously added to the system by heating or light irradiation. At this time, in the solid electrolyte battery, in order to reduce the internal impedance of the battery, it is preferable that the positive electrode, the negative electrode, the separator (used as necessary), each element, and the solid electrolyte are combined, and therefore, at the same time as the polymerization. It is good to combine each element.
Here, the term "compositing" means impregnating a battery element such as polyaniline or a separator with a polymerization solution before becoming a solid electrolyte, and then solidifying the whole by light.

The sheet-like polymer secondary battery having such a structure is used as an IC card 1 having the structure shown in FIG.
When arranged on at least one card surface of the card body 2, this sheet-shaped battery can effectively shield harmful electromagnetic waves to the IC card body 2 and prevent malfunction of the IC card. Becomes In particular, when the surface shape and area of the sheet-shaped polymer secondary battery are the same as those of the IC card main body 2, electromagnetic waves can be effectively shielded over the entire surface of the IC card main body 2. When the batteries are arranged on both sides of the IC card body 2, electromagnetic waves can be almost completely shielded.

Further, the capacity of the sheet-shaped polymer secondary battery can be increased as the area thereof is increased. Specifically, 5 is applied to one side of the IC card body 2.
It is good to arrange the sheet-like polymer secondary battery 3 in an area ratio of 0% or more, preferably 60% or more. That is, when the area ratio is 50% or less, the capacity of the battery becomes small, and the electromagnetic wave shielding effect as described above cannot be sufficiently obtained. Therefore, in the first embodiment, this area ratio should be at least 50% or more, and most preferably 100%.

Further, since the sheet-shaped polymer secondary battery can be charged, basically there is no need to replace the battery. That is, most of conventional IC cards are primary batteries using an inorganic active material, specifically, coin-type 1
Since the secondary battery is used and cannot be charged because it is a primary battery, the battery needs to be replaced when it reaches the end of its life, and the contents retained in the memory element 12 at the time of battery replacement volatilize. However, in the present invention, since the rechargeable polymer secondary battery is used, it is not necessary to replace the battery, and therefore the problem of volatilization of the content of the memory element 12 does not occur. Further, even if the primary battery using the inorganic active material is not a coin type but is attached to the card surface of the IC card main body in the form of the sheet of the present invention, the battery needs to be replaced and the battery holder is further Although required, the sheet-shaped polymer secondary battery of the present invention does not require any battery holder.

Further, in the sheet-shaped polymer secondary battery of the present invention, when the area is the same as the IC card 1 and the thickness is about 450 μm, a large current of up to 25 mA can be continuously taken out. This is a very large current amount as compared with the conventional coin type primary battery, and the conventional coin type lithium secondary battery (current amount of 20 mA cannot be continuously taken out: CR2016 ) Is also a large amount of current when compared with. Therefore, the memory backup of the dynamic RAM, which cannot be achieved by the conventional coin-type lithium battery, is possible, and the memory backup can be performed by the dynamic RAM of 2 Mbytes for about 30 minutes or more.

Furthermore, by using a sheet-like polymer secondary battery as the battery, it becomes possible to make the entire IC card smaller, thinner, lighter and highly functional.

That is, although it is desired by those skilled in the art to make the IC card thinner, it is difficult to make a card of 2.0 mm or less as long as the current flat package type element is mounted. Come on. To make it thinner, TAB is currently used for custom use.
A (tape automated bonding) type element (semiconductor (silicon) itself is mounted on a tape) will be used, and according to this, a card substrate of about 1.0 mm is considered possible. However, in this case, when the conventional coin-type primary battery is used, it is impossible to mount it because the thickness is 1.6 mm. Even if a conventional primary battery or secondary battery of an inorganic active material is processed into a sheet type as in the present invention and used, the inorganic active material can be used as compared with the polymer active material of the present invention. In order to secure flexibility with respect to thinness due to poor flexibility, it is necessary to increase the binder in the active material, for example, but increasing the binder causes a problem that the energy capacity is lowered.

On the other hand, since the polymer secondary battery of the present invention itself has flexibility suitable for thinning, that is, forming into a sheet, it is clear from the various characteristics described above. As described above, the above problems can be sufficiently solved, and by processing this into a sheet shape and using it, it becomes possible to produce an extremely thin IC card of 1.5 mm or less as a whole.

Further, the IC card body 2 does not require a mounting space for a coin-type battery conventionally mounted on the substrate 6, and a space can be provided. Therefore, the entire size can be reduced accordingly. Alternatively, it is possible to further install a memory element in the space or to mount another functional unit.

For example, in the IC card of the present invention, the polymer secondary battery is charged by the supply of electric power from the electronic device side as described above, and once charged, it can be used for a long time. In order to further improve the reliability and reliability, it is more preferable that the charging circuit is provided inside, and in this case, the charging circuit can be mounted in the space.

As the charging circuit, a constant current charging circuit or a quasi-constant current charging circuit (a resistor is inserted in series between the DC power source and the battery to increase the output impedance of the charging circuit to make the charging current value substantially constant. Any method such as a holding method) and a constant voltage charging circuit can be used, but a quasi-constant current charging or constant voltage charging charging circuit is preferable as the charging circuit of the polymer secondary battery of the present invention. The elements (resistors, regulators, etc.) that make up the charging circuit must be set appropriately according to the charging voltage and current, and basically any element shape can be used, but it is preferable that it is thin and lightweight. In order not to impair the characteristics of the polymer secondary battery, it is preferable to use a thin and light element such as a thin film resistor such as a chip resistor or a thin regulator, or a thin semiconductor element having these built-in.

Further, in the above-mentioned configuration example of the IC card of the present invention, the conventional problem is solved by using the secondary battery instead of the primary battery, but the primary battery is used together with the secondary battery. It can also be configured as follows. In particular,
The current IC card equipped with static RAM has a memory capacity of 512 Kbytes for holding data.
A current of 30 μA needs to be continuously supplied. Currently available coin-type Li secondary battery (CR2016)
Then, it has a maximum capacity of 20 mAh. When this battery is used to back up a 512 Kbyte memory device, the contents stored in the memory device can be retained for about one month or longer, but this is not a sufficient length. If it is not used for a long time, the content of the memory element is volatilized. On the other hand, in the case of a lithium primary battery, CR2016 enables memory backup for about 5 months or more. However, in this case, since it is a primary battery, it is inevitable that the memory volatilizes when the battery is replaced. On the other hand, by using the primary battery and the secondary battery together in the IC card, such a problem can be solved, and the problem of memory backup for a long period and memory volatilization at the time of replacement of the primary battery is solved. It becomes possible to solve it.

Further, when the sheet-shaped polymer secondary battery according to the present invention is used as the secondary battery, the secondary battery has the same area as the IC card 1 and a thickness of about 450 μm and an electric capacity of 30 mAh. It can be secured, can withstand longer use as a memory backup, and even when used in combination with a primary battery, there is no need to newly provide a space for a secondary battery on the substrate, which makes the IC card design easier.
It is possible to further increase the memory capacity.

FIG. 3 is an exploded perspective view showing a second embodiment of the IC card of the present invention. IC of this second embodiment
The card 21 has an IC card body portion 22 and a sheet-shaped polymer secondary battery 23 arranged on at least one card surface of the IC card body portion 22. In the example of FIG. 3, one card surface 2 of the IC card body 22 is
The polymer secondary battery 23 is arranged only in No. 4.

By the way, in the above-mentioned IC card 1 of the first embodiment, the IC card body 2 is provided with the pin terminals 10a to 10n, and the pin terminals 10a to 10n are connected to the electronic equipment. But the second
In the IC card 21 of the above embodiment, the IC card body 2
2 has a magnetic coupling part 25 instead of a pin terminal.
Is provided, and electric power and information are transmitted to and from the electronic device by the magnetic coupling section 25.

In the IC card having such a structure, electric power and information can be transmitted in a mechanically non-contact state with an electronic device, so that the safety of maintenance can be ensured. Further, in this case, the configuration of the other parts of the IC card body 22 and the basic configuration of the sheet-shaped polymer secondary battery 23 are the same as those of the first embodiment, but the sheet The polymer rechargeable battery 23 in the form of a ring has an electromagnetic shielding effect, and therefore, in the second embodiment, it is necessary to dispose the polymer rechargeable battery 23 in the portion of the main body portion 22 excluding the magnetic coupling portion 25. The magnetic coupling portions 25 are individually provided in the IC card, and occupy a considerable area in the IC card as shown in FIG. For this reason, the space in which the memory element (for example, static RAM) of the IC card can be mounted is naturally limited. In addition to this, the conventional IC card is provided with a space for the primary battery for backing up the memory element, so that the mounting space for the memory element is further limited, and the capacity of the memory is increased. In the above, the configuration with the magnetic coupling portion is disadvantageous. However, according to the present invention, even when the magnetic coupling portion 25 is provided, the battery is
Since this space is not required on the substrate, the IC card can be manufactured without extremely reducing the memory capacity.

In the second embodiment as well, in order to reliably shield harmful electromagnetic waves and increase the capacity of the battery, it is desirable to make the area of the sheet-like polymer secondary battery 23 as large as possible. In the case of the second embodiment, since the magnetic coupling portion 25 is provided, the IC card main body portion 2 excluding the magnetic coupling portion 25 is provided.
It is best to dispose the polymer secondary battery 23 in such a size as to cover the second card surface.

Further, as in the first embodiment, it is possible to add memory elements or provide other functional elements by the space of the primary battery, for example, a charging circuit for a polymer secondary battery. Can be further added.

Further, as in the first embodiment, it is possible to use a primary battery and a secondary battery together. In this case,
A sheet-shaped polymer secondary battery is preferably used as the secondary battery.

[0039]

EXAMPLES Examples of the present invention will be described below.

Example 1 In this example 1, a sheet-shaped polymer secondary battery was actually manufactured and its performance was examined. First, aniline 0.75
In a 3M (mol) HBF ₄ aqueous solution containing M (mol),
As a reaction electrode, 0.9 blasted to 20 μm
Stainless sheet with through holes of mmφ (reaction area 4 x
7.1 cm), platinum was used as a counter electrode, and aniline was polymerized at a constant current of 3 mA / cm ² to obtain polyaniline. The amount of electricity applied was 12 C / cm ² (polymerization on only one side, masking with an adhesive tape on the other side). After thoroughly washing this stainless polyaniline electrode with running water, a stainless steel was used as a counter electrode in 0.2N sulfuric acid, and a saturated sweet syrup electrode (SCE) was used as a reference electrode, and the potential was sufficiently removed by applying a potential to −0.4 V _VS SCE. A doping operation was performed. This 2
After reduction with a 0% hydrazine aqueous solution, washing and drying, this electrode was pressed to 175 μm, and then, as shown in FIG.
A polyaniline electrode 50 as shown in was obtained.

Further, as shown in FIG. 4B, the thickness 50
Prepare a SUS plate 51 of μm (85.6 x 54 mm, the same area as the JEIDA standard IC card), and add a thickness of 300 μ
m of the heat-fusible plastic 52 is used as a spacer, and the electrode 50 of FIG.
The portion A and the portion B of the plastic 52 were heat-sealed to form a member 54 as shown in FIG.

Next, 74% of an electrolytic solution in which 3M (mol) of LiBF ₄ was dissolved in a 7/3 (volume fraction) mixture of propylene carbonate and dimethoxyethane, 20% of ethoxydiethylene glycol acrylate, and silicon-alkoxy were used. A solution was prepared by mixing 1% of the renioxide adduct and 25% of benzoyl peroxide.

After sufficiently adding this solution to the surface of the member 54 of FIG. 4 (c), the pressure was reduced to 100 Torr and the mixture was allowed to stand for 10 minutes. After that, the pressure was returned to normal pressure, and the polyaniline was sufficiently infiltrated to sandwich the member 54 with a glass plate so that the polyaniline did not swell. In this state, light from a high pressure mercury lamp was irradiated for 1 hour to prepare a composite electrode of polyaniline and solid electrolyte. Then, on the surface of this electrode, a separator (Daikin Industry Co., Ltd., Celgard 3501 thickness 25 μm) sufficiently impregnated with the above liquid was laminated, and after pressure bonding with a glass plate, the light of a high pressure mercury lamp was again irradiated for 1 hour, The separator was also compounded. The thickness was 260 μm (positive electrode).

Next, as a negative electrode, 80 μm of Li was pressure-bonded to a 20 μm suspension (member 56, FIG. 5).
(A)). This electrode was fused to a heat-fusible sheet having a thickness of 125 μm and having aluminum as a central member to prepare a member 58 as shown in FIG. 5 (b).

Thereafter, the mixed solution was applied to the surface of the member 58, and a Teflon transparent sheet was placed on the surface to ensure the wettability of the surface. This was sandwiched with a glass plate and then irradiated with light from a high-pressure mercury lamp for 1 hour to form a solid electrolyte on the surface of Li (negative electrode member).

Then, the member 58 (negative electrode member) on which the solid electrolyte is formed as described above is bonded to the positive electrode member, and the peripheral portions thereof are heat-sealed, as shown in FIG. 5 (c). A battery 60 was manufactured.

The total thickness of the battery 60 thus manufactured was 495 μm. The performance of the battery 60 is
3 at operating voltage of 2.5-3.7V and charging / discharging of ± 3mA
The electric capacity was 1 mAh. The short-circuit current was 100 mA or more, and a current of 25 mA could be continuously applied.

Example 2 In this Example 2, except that the battery size was 5 × 6 cm,
A battery was manufactured by the same process as that of the battery of Example 1.
The battery produced in Example 2 has a performance of 2.5 V to
13m with operating voltage of 3.7V and charge / discharge of ± 2.4mA
The electric capacity was Ah.

Example 3 In this Example 3, the sheet-like polymer secondary battery produced in Example 2 was actually incorporated into the existing IC card shown in FIG. 6 to produce a new IC card. In addition,
The IC card shown in FIG. 6 is manufactured by Japan LSI Card Co., Ltd., and the magnetic coupling portion 7 is provided on the card substrate 70.
1, memory element 73 (C-MOS S-RAM 32KB
Capacity), an LSI gate array 74, etc., and a coin-type primary battery 75 (CR2025), and the thickness of the card substrate 70 is 3.1 mm.
The total thickness of the C card is 3.8 mm.

In Example 3, first, the sheet-like polymer secondary battery produced in Example 2 was laminated on the portion of the card substrate 70 of FIG. 6 excluding the magnetic coupling portion 71. The total thickness at this time was 3.6 mm. Next, the terminals of the polymer secondary battery were connected in parallel to the battery terminal portion (not shown) of the primary battery 75. Then, when the connection of the primary battery 75 was disconnected and the memory element 73 was read from the electronic device side via the magnetic coupling portion 71, the content of the memory element 73 was correctly held. From this, the sheet-shaped polymer 2 according to the present invention
It was confirmed that the magnetic coupling part operates normally and the contents of the memory element can be retained even when the secondary battery is used, and it is confirmed that the polymer secondary battery can be used as a backup power source when the primary battery 75 is replaced. Was given.

Further, this means that it is not necessary to newly provide a space for the secondary battery on the substrate even when the primary battery and the secondary battery are used together to prolong the memory holding time. Therefore, it was also confirmed that this facilitates the design of the IC card when the sheet-shaped polymer secondary battery is used.

Fourth Embodiment In the fourth embodiment, a coin type 1 is used from the card substrate 70 of FIG.
The secondary battery 75 was removed, and as shown in FIG. 7, a chip resistor 80 and a flat package regulator 81 were incorporated in the space to produce a 5V input, 3.7V output constant voltage charging circuit 82. From this, it was found that the charging circuit could be sufficiently mounted in the space of the primary battery.

Next, the charging circuit 82 is connected to a sheet-shaped polymer secondary battery (open circuit voltage is 3.3 V),
Magnetic coupling was performed. After 24 hours, the polymer secondary battery was removed from the coupling device and the voltage of the polymer secondary battery was measured. As a result, it was found to be 3.68 V, indicating that the polymer secondary battery was charged.

[0054]

As described above, the I according to claim 1 is provided.
According to the C card, since the sheet-shaped solid polymer secondary battery is disposed on at least one card surface of the IC card body, further miniaturization, thinning, weight reduction and high performance are realized. Yes, without the need for battery replacement
For example, it is possible to surely back up the memory element in the card, and also to shield the card from harmful electromagnetic waves.

Further, in the IC card according to the second and third aspects, the sheet-like solid polymer secondary battery is formed in a predetermined area ratio with respect to the card surface of the IC card body so that the card is protected from harmful electromagnetic waves. It can be surely shielded.

According to the IC card described in claim 4,
Since the IC card main body is further provided with a charging unit for charging the solid polymer secondary battery, the safety and reliability of the card can be further improved.

According to the IC card of the fifth aspect, the IC card main body is provided with the primary battery,
Since the polymer secondary battery is designed to be used in combination with the primary battery, it is possible to back up the memory for a long time, and also to solve the problem of memory volatilization when replacing the primary battery. it can.

According to the sixth aspect of the IC card, it has flexibility and can be processed into a sheet.
Since the thickness is 1 mm or less, the IC card can be made extremely thin, and the IC card can be shielded from harmful electromagnetic waves.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of an IC card of the present invention.

FIG. 2 is a diagram showing a configuration example of a sheet-shaped solid polymer secondary battery.

FIG. 3 is a diagram showing a second embodiment of the IC card of the present invention.

4 (a), (b), and (c) are views for explaining one step in manufacturing the polymer secondary battery according to the present invention.

5 (a), (b) and (c) are views for explaining one step in manufacturing the polymer secondary battery according to the present invention.

FIG. 6 is a schematic configuration diagram of an existing IC card.

7 is a diagram showing a state in which a coin-type primary battery is removed from the IC card shown in FIG. 6 and a charging circuit is incorporated in the space.

[Explanation of symbols]

1, 21 IC Card 2, 22 IC Card Main Body 3, 23 Solid Polymer Secondary Battery (Power Generation Element) 4 Card Surface 6 Substrate 7 Resin 10a to 10n Pin Terminal 11 Control IC 12 Memory Element 13 Power Line 14 Electrical Connection Part 25 Magnetic Coupling Section 31 Positive Electrode 32 Negative Electrode 33 Separator 34 Electrolyte Component

Claims (6)

[Claims] 1. An IC card in which a sheet-shaped solid polymer secondary battery is arranged on at least one card surface of an IC card main body. 2. The IC card according to claim 1, wherein the sheet-shaped solid polymer secondary battery is formed such that the area ratio of the IC card body to the card surface is in the range of 50% to 100%. I characterized by
C card. 3. The IC card according to claim 1, wherein when the IC card body has a magnetic coupling portion, the sheet-shaped solid polymer secondary battery excludes the magnetic coupling portion. An IC card characterized by being formed on a card surface of an IC card body. 4. The IC card according to claim 1, wherein the IC card main body is further provided with a charging unit for charging a solid polymer secondary battery. 5. The IC card according to claim 1, wherein the IC card main body is provided with a primary battery, and the solid polymer secondary battery is used together with the primary battery. An IC card that is characterized by 6. The IC card according to claim 1, wherein the solid polymer secondary battery uses a polymer compound for at least one electrode, and uses a viscoelastic solid electrolyte as an electrolyte component, and An IC card which is flexible, can be processed into a sheet, and has a thickness of 1 mm or less.