JPS59189554A - Flexible thin battery - Google Patents

Abstract

PURPOSE:To provide a flexible thin battery having easy deformation and sliding and secure electrical contact by installing through holes and concavity and bonding lead terminals. CONSTITUTION:Power generating elements such as an anode active material layer 2 and a cathode active material layer 3 are covered from upper and lower directions with outer jacket materials 6 and 7 such as polyester film laminated with anode and cathode current collectors 4 and 5 in their insides, and peripheries 8 are heat sealed in airtightness. Through holes 9 and 9' and concavity are installed on both sides of the periphery 8 and anode and cathode lead terminals comprising conductive high molecular material such as conductive silicone rubber are inserted and bonded to electrically connect to the current collectors 4 and 5. In this flexible thin battery, lead terminals 10 and 11 are simply connected by bonding the battery even if terminals for power source are not located in the same axis.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible thin battery.
Batteries in which a power generating element is encapsulated in a polymer film are known as vapor batteries, notebook batteries, etc., but they are susceptible to bending and impact, and must be handled with great care.

Therefore, consideration is being given to using a synthetic polymer film as an exterior member to maintain flexibility and elasticity of the power generating element and molding it into a sorted shape, thereby imparting flexibility to the entire battery.

In conventional thin batteries known as paper batteries and sheet batteries, cathode and anode lead terminals B and C are generally provided on the plane of a flat-shaped thin battery A, as shown in FIG. was. Such thin batteries do not lose their flammability, and can be easily stored in devices such as calculators, toys, etc., by placing the lead terminal surface of the battery in contact with the battery compartment, and then folding when connected. There were limits to the matching format.

However, the highly flexible nature of the baked tank type battery increases the degree of freedom in the mating configuration, and improves the sliding properties of the electrical connection between the device and the battery, and the reliability of contact during IIi attack. was required. For example, even if a battery is deformed and stored in a complex q-i space within a device, with conventional batteries, the lead terminals must be firmly pressed from the outside to prevent them from shifting, which may cause the separator to tear and cause the cathode current to collect. An internal short circuit □ occurred due to contact between the bodies. Excessive pressure was applied to the body, causing significant deformation, resulting in damage to the output section, pressure, internal resistance,
Problems such as abnormalities in electrical characteristics such as maximum allowable current and discharge may occur, or even if batteries are connected or disconnected, it is difficult to connect or disconnect between lead terminals, and multiple batteries may be connected or disconnected. Once a battery group is completed, it can be easily assembled to form a battery group of any shape, such as a laminar power supply arrangement made by stacking batteries in a bundle. There are problems in use, such as the difficulty of separating and dispersing batteries into individual batteries. There has been a need for flexible thin batteries that can be easily aggregated and dispersed, have reliable electrical connections, and can provide a stable energy supply.

In view of the above circumstances, the present inventor conducted various studies in order to meet the above requirements without impairing the performance of the pond, and as a result, =
A through hole and/or a section are provided in a part of the exterior part of the J' IN polymer film, and a lead terminal part formed of an electrostatic polymer material is provided in the inner wall of the through hole and/or the four parts. It was found that the current collector in the power generation element and the lead terminal portion need only be configured to be electrically connected.

In the present invention, the exterior members include, for example, 7-1-ester, polyethylene, polypropylene, poly-1-imide, Epokin,
Adding resistant polymer materials to Teflon, polyvinyl, polycarbonate, etc., zinc-manganese dioxide, zinc-mercury oxide, zinc-silver oxide, zinc-silver peroxide ,
Lithium m-[Ishimanganese, 1-notium carbon fluoride,
Various types of electricity are applied to 78 substance systems such as silver and silver.
A photovoltaic generator containing an I+ liquid, a current collector, and an additive B agent, or a selenium-based, CdS-based, or silicon-based photovoltaic generator, and a single node terminal made of a conductive polymer material is installed on its inner wall. hang your head 4. Turmeric polymer material phase, for example, styrene butadiene rubber, inoprene rubber, chloroprene rubber, nitrile fritene rubber, fluorine rubber, silicone rubber, ethylene propylene rubber, urethane rubber. Coam threading agents such as polyester resins, epoxy resins, acrylic resins, methacrylic resins, vinyl salt resins, phenolic resins, silicone resins, etc.
Addition polymer resins such as carbonate resins and melamine resins, polyaddition resins, polycondensation resin materials, or mixed materials of the above-mentioned rubber materials and resin materials are used as binders, and acetylene black, CC black, etc. are used as conductors. High structure carbon black such as CF black or fine powder of metals and metal oxides such as aluminum, nickel copper, zinc, palladium, silver, indium, platinum, gold, stainless steel, tin oxide, indium oxide, etc. is mixed into the binder. can be used. The power generating element is equipped with a cathode and anode current collector, and is made of copper, stainless steel, aluminum,
It is formed by laminating a base material of carbon or the like into a net shape, or by vacuum deposition, sputtering, or other methods. The IJ-do terminal portion and the current collector are electrically connected by extending one or both of them or by interposing another conductive connecting member.

In order to further achieve the object of the present invention, the following specific conditions are particularly required for the configuration of the electrical contact portion between the lead terminal portion and devices, devices, and batteries. ■ Must be readable and elastic; ■ Must be slidable and maintain good conductivity; ■ Must be durable (does not wear out or age);
Typical operating temperature range for 0 boxes and 1 pond (-20 to +40°C)
The above conditions ■■■ are satisfied. In order to satisfy these conditions, a rubber material such as styrene butadiene com, butadiene rubber, chloroprene com, or silicone rubber can be used as the binder, or polyurethane, poly(meth)acrylic acid ester, polyamide, etc. can be used as the binder.
Oxygen permeable materials such as polyethylene terephthalate, polyvinyritine chloride, polyvinyl chloride, vinyl chloride-vinylidene chloride copolymer, polyacrylonitrile, acrylonitrile-vinyritine chloride copolymer, polyamide, polyvinyl alcohol, etc. are blended with resin materials such as polynisnal. Leads are made by adding antistatic resin materials, titanium oxide, colloidal resin, inorganic powders such as calcium carbonate, and antistatic agents to prevent sticking of wires, and mixed with the above-mentioned conductors. It is preferable to form a space between the terminals. By blending a resin material that prevents oxygen permeation, it prevents the oxygen in the air that permeates the battery from penetrating through the lead terminals and entering the power generation chamber, minimizing the acceleration of leakage. 'AjIJ can do 1, especially Aruka')
Since liquid leakage in the system causes severe corrosion of equipment, etc., applying this method is effective in preventing corrosion of electrical connections and contact failure.

In addition, if the lead terminal part is formed to have the same elasticity, flexibility, and hardness as the exterior part, the deformation and curvature of the entire battery can be made uniform, so a lead terminal part is provided. 6. All of these depend on the blending ratio of each constituent material of the binder, the combination with the conductor, and the mixing concentration depending on the intended use of the battery. Improve the material structure in a timely manner (often, but not necessarily the above material structure).
It is not limited to Ebisu. Furthermore, in order to satisfy the above-mentioned specific conditions, it is necessary to consider the shape, position, and structure of the lead terminal portion, and there are embodiments corresponding to various purposes.

The present invention will be further explained based on examples, but the present invention (d) is not limited to the following examples.

Embodiment 1 FIGS. 2A and 2B are cross-sectional views of a flexible thin battery showing a first embodiment of the present invention, and FIGS. 2B and 2B are plan views thereof.

A cathode active material layer 2 made of a zinc foil with a thickness of 0.5 mm with a separator 1 in between, and a thickness 1 made of a mixture of a conductive filler such as a carbon blank and a binder mainly composed of bi-enemy manganese. Qmm anode active material*, layers 3 facing each other, separator E and anode active material je layer 3 impregnated with enriched ammonium-zinc chloride based electric IA, and made of aluminum with a thickness of 500 μmη. Laminate the cathode and anode current collector 4.5 on the inward surface with a width of 2cm and a length of 12cm.
An exterior member 6.7 made of a polyester film having a thickness of 1171111 mm is held from above and below, and the peripheral edge 8 is heat welded to airtightly seal it. A diameter of 4 m is provided at both ends of the peripheral edge 8 in the longitudinal direction.
A through hole 9.9' having a diameter of m is provided, and a cylindrical cathode and anode lead terminal portion 10.11 is inserted into the through hole 9.9' and fixed with adhesive. Terminal part 10,] 1 is made of linear dimethylpolynoroxane as the main IJy component, with addition of a crosslinking agent, carp medium, etc./Ricoh/Conductive silicone with rubber mixed with carbon. It is electrically connected to the rubber sword, the anode current collector 4.5, and the anode current collector 4.5.

As shown in FIG. 3, the battery 12 configured as described above can be used, for example, in the space between the electrical terminals 13 and 13' that are installed not on the same axis but facing each other. The entire battery is curved, making it possible to easily connect the lead terminals, preventing shock and vibration from occurring at the power supply terminals 13.1.
3', it was buffered by the elastic force of the lead terminal portion and the flexibility of the entire battery, and a reliable power supply was always possible without chattering or abrasion due to I-movement. In addition, the power supply terminal for equipment as shown in Fig. 3 is an example of an unconventional installation structure, but it can be used without providing a battery compartment in the equipment, which is subject to space and shape limitations as in the past. For example, as shown in FIG. 4, it has become possible to easily remove the battery 12 by utilizing the narrow space inside the device 14.

Embodiment 2 FIG. 5(a) is a partial sectional view of a flexible thin battery showing a second embodiment of the present invention, and FIG. 5(b) is a plan view thereof.

A battery was fabricated in the same manner as in the first embodiment except that the electrical contact portions of the cathode and anode lead terminals 15 and 15' (the positive electrode terminals are not shown) were shaped into curved surfaces as shown in FIG. form 16. As shown in FIG. 6, when installing the main cage 16 in the continuous curved storage section 17a of the device 17,
A power supply terminal 1 protrudes vertically 1θ in the battery storage portion 17a.
8.18' penetrates the cathode and anode lead child part 15.15' at its center, so that the battery 16 can be stably fixed in close contact with the curve (2). The cathode and anode lead terminal portions 15 and 15' are curved in the same way as the battery storage portion 17a, but since the contact portions in which the electrical rectangular portion is curved face each other, the lead terminal portion Also, since the uneven stress generated in the surrounding area is buffered as much as possible, the lead terminal part and its surrounding area are also curved smoothly, and at the same time, it is possible to make the electrical strings more stable. For example, tE', h is a spherical m pond storage part t/' (L), but the same effect is obtained.

Embodiment 3 FIG. 7 is a partial sectional view of a BJ Kusunoki thin-shaped city and pond showing a third embodiment of the present invention, and (b) is a plan view thereof.

Multiple grooves 2 are provided on the outer periphery of the cathode and anode lead terminal portions 19 and 20.
A battery 2 was prepared in the same manner as in Example 2, except that the cathode and anode lead terminals 19 and 20 were provided with stepped teeth on one peripheral edge of the battery.
As shown in FIG. 8, the battery 22 forming the battery 22 is provided vertically on the end of a glass substrate 23, and is made of flat electrode terminals 24 and 25 made of nickel-plated phosphor bronze.
A plurality of lead terminal portions 19.2o are passed through from above, one or more are layered one on top of the other, and fastened with a stopper 26.

The battery group replaced in this way can easily adjust the output voltage, output current, and capacity of the battery group by freely adding or removing the whistle and the pond 22, and can withstand shocks. Since there is no chattering and it can be easily carried and used, it has great utility when an emergency power supply is needed outdoors or as a power supply device for equipment that requires constant carrying.

In addition, since the electrical connection is maintained stably even when the battery 22 slides on the electrode terminals 24 and 25, a plurality of batteries can be stored in a file to form a book-shaped power supply device. For example, flexible display devices, circuit boards including integrated circuits, switches, elements, etc. are
By arranging them in a layered manner with the above batteries, it is possible to obtain an unprecedented notebook-type portable information display device.
It became Noh. Furthermore, the multi-striped grooves 21 on the outer periphery of the cathode and anode lead terminals 19 and 20 absorb stress generated from free sliding, curving, deformation, and tension of the battery, so that free movement of the battery is not prevented. , and was able to maintain a stable electrical connection and provide a stable power supply.

Embodiment 4 FIG. 9(a) is a cross-sectional view of a thin-shaped pond provided by a town showing a fourth embodiment of the present invention, and FIG. 9(b) is a plan view thereof.

The 068 layer 27 and the Cu2S layer 28 are laminated, a metal foil cathode current collector 29, 30 is formed on the outward facing surface, and the whole is hermetically covered with a transparent flexible 45'J exterior member 31. Transparent flexible exterior members include polycarbonate, polyethylene terephthalate, polybutylene terephthalate,
Preferably, one or more of polyether sulfones are used, and the power generation element is covered by two films stacked one on top of the other, or by integral molding.

A cylindrical through hole 34 is provided in the center of the outer peripheral end surface 32 and 33.
．． 34', and cathode and anode lead terminal parts 37 and 38 having small through holes 35 and 36 in the center are inserted and fixed with adhesive. The cathode and anode lead terminal parts 37 and 38 are made of conductive silicone rubber whose main component is linear methylvinylpolysiloxane, mixed with carbon in a silicone rubber medium containing crosslinking agents, reinforcing agents, catalysts, etc. f
f? They are electrically connected to bodies 29 and 30, respectively.

The CdS solar cell 39 configured as described above is one of the paper sheets.
It is light, thin, and highly flexible, making it easy to change the shape of the light-receiving surface of the solar cell in order to maintain high light-to-electrical energy conversion efficiency in accordance with the changing incident angle of sunlight and other external light. Following the change in the shape of the light receiving M1, the electrical contacts between the battery lead terminal and other connection terminals slide against each other, causing the lead terminal and its surroundings to deform, but the lead terminal remains stable. Since it maintains a good electrical connection, it can be easily carried outdoors and installed in equipment, etc., and remains stable even when the battery moves freely or is subjected to external shocks or vibrations. It can supply energy to equipment, etc., and has the value of being used as a solar market or a pond.

Embodiment 5 FIG. 10(A) is a sectional view of a flexible thin battery showing a fifth embodiment of the present invention, FIG. 10(B) is a plan view thereof, and FIG.
(b) A partial plan view showing the state in which the flexible thin battery is attached to a support, (b) (IJ), and (b) a partially cutaway view cut along lines 1 to 11 of (a). It is.

The cathode and anode lead ends and the child parts 40 and 41 are connected to the recesses 40a and 4.
The lead terminal portions 40 and 41 are provided above and below one peripheral edge of the battery so that the castle surfaces of the lead terminal portions face each other, and the entire battery is formed into a skewer shape. A CdS solar cell 42 is formed in the same manner as in Example 4.

For example, as shown in FIG. 11, the solar cell has a support 45 provided with a plurality of radially projecting upper and lower connection terminals 43, 44, and a cathode and anode lead terminal portion 4o1.
It is possible to form a series of battery groups by holding the solar cells 41 from above and below, and the solar cells 42 have one end fixed and the other end curved downward, and have cathode and anode lead terminals. It is freely rotatable in the direction of the arrow a about the contact portion between the portion 40.41 and the connecting terminal 43.44.

The battery of this example is deformed so as to constantly obtain high energy conversion in response to local incidence of external light and changes in the incidence angle.
It can be rotated freely, and at the same time, even if it is clamped and connected to a support, the power generating element is not compressed, so there is no performance deterioration, and even if the electrical connection part slides, it does not wear out and maintains stable contact. It is a dog that is suitable for outdoor use.

[Brief explanation of the drawing]

Figure 1 is an overall perspective view showing a conventional thin battery;
Figure (a) is a cross-sectional view of a flexible thin battery showing the fPJ1 embodiment of the present invention, (b) is its flat WI diagram, and Fig. 3 is a flexible thin frost and pond diagram of the fPJ1 embodiment of the present invention. Fig. 14 is a perspective view showing a state in which the batteries are connected to mutually opposing power supply terminals, and Fig. M14 is a side view showing a state in which the resistible trough-type battery shown in the first embodiment is housed and connected in a space within the device. , FIG. 5(A) is a partial cross-sectional view of a flammable thin battery showing a second embodiment of the present invention;
b) is its plan view, and Fig. 6 is shown in the second embodiment.
7 is a perspective view showing a state in which a three-resistance thin battery is housed and connected in a curved battery storage part, and FIG. 7(A) is a partial cross section of a flexible thin battery showing a third embodiment of the present invention. Figures 8 and 9 are plan views thereof, and Figure 8 is a perspective view showing a state in which a plurality of n'' type thin batteries shown in the third embodiment are stacked and connected in a file type. Figure (I) shows the fourth embodiment of the present invention. FIG. 10(B) is a cross-sectional view of a flexible thin battery showing a fifth embodiment of the present invention; FIG. 10(B) is a plan view thereof. FIG. 11(A) is a partial plan view showing the state in which the flexible thin battery shown in the fifth embodiment is attached to a support; FIG.
is l −I+ quotient of (a)! It is a partial sectional view cut along K. A... Thin battery BXC... Lead terminal 1...
Separator 2 - Cathode active material layer 3 - Anode active material layer 4.29 - Implicit current collector 5.30 - Anode current collector 6.7.31 - Exterior member 8 - Periphery Department
9.9', 34.34', 35.36・Through hole 10
, 11, 15, 15 '1.19, 20 37, 38
, 40, 41 ・ ・ ・ Lead medium part 12
．． 16.22...Battery 13.13', 14'14'',
18.18'...Electrode terminal 14.17...Equipment 1.7a...Battery storage part 21...Multi-strip groove 23...Substrate 24.25...Electrode A1 looper
26...41a... Concavity 43.44... Connection terminal 45... Support device Patent applicant Tomomi Segi 10 1 old C phrase 1 mouth) Fig. 3 S-mouth 16 Now Fig. 6 17 15 'ld leaf 7 figure 22 d! + 80th 2

Claims (1)

[Claims] oJ' In a flammable thin battery in which a power generating element is hermetically encapsulated with an exterior member made of a Wb bulk polymer material, a through hole and/or a recess is provided in a part of the exterior shell, and the through hole and /or A lead terminal portion molded from a conductive polymer material is adhesively fixed to the inner wall of the four parts, and the current collector in the power generation element and the lead terminal portion are electrically connected. Possible 45'/thin battery.