KR100686974B1 - A high-voltage microbattery using electrolyte isolation of serially connected unit cells in a single chip and manufacturing method thereof - Google Patents

Abstract

Provided are a high-voltage microbattery in which the injection and isolation of an electrolyte is convenient and which can obtain high voltage via serial connection of unit cells in a single chip with ease, and a manufacturing method thereof. The high-voltage microbattery includes an electrode layer(200) on which an electrode pattern(220) is formed; a flow channel layer(100) equipped with a plurality of unit cells(110) with a predetermined size, which has an air outlet on a side thereof, a central flow channel which is connected to the unit cells(110), an inlet which is formed on one end of the central flow channel and an outlet which is formed on the other end of the central flow channel; and an electrolyte with which each unit cell(110) is filled.

Description

High voltage micro battery and its manufacturing method {A HIGH-VOLTAGE MICROBATTERY USING ELECTROLYTE ISOLATION OF SERIALLY CONNECTED UNIT CELLS IN A SINGLE CHIP AND MANUFACTURING METHOD THEREOF}

1 is a circuit diagram schematically showing a coupling degree of a high voltage microcell and a connection state of unit cells of the microcell according to the first embodiment of the present invention.

FIG. 2 is a plan view of a flow path layer of the microcell shown in FIG. 1;

FIG. 3 is a plan view of an electrode layer of the microcell shown in FIG. 1;

4 is a schematic diagram illustrating a process of filling an electrolyte into a flow path layer illustrated in FIG. 2;

5 is a plan view showing a modification of the flow path layer,

6 is a plan view showing another modification of the flow path layer,

7 is a plan view showing another modification of the flow path layer,

8 is a plan view showing a modification of the electrode layer,

FIG. 9 is a circuit diagram schematically illustrating a coupling degree of a high voltage microcell and a connection state of unit cells of the microcell according to the second embodiment of the present invention formed by combining the flow path layer of FIG. 2 and the electrode layer of FIG. 8. to be.

<Description of Symbols for Major Parts of Drawings>

100: euro layer 110: unit battery cell

112: air outlet 114: buffer space

120: Central Euro 122: Exit 1

124: second exit 126: fluid resistance projection

130: inlet 140: outlet

150: electrolyte storage space

200: electrode layer 210: unit electrode

220: electrode pattern

The present invention relates to a microcell, and more particularly, to a high voltage microcell that can obtain a high voltage through a plurality of unit cells connected in series on a single chip.

The present invention also relates to a method for fabricating a micro cell, and more particularly, to a method for fabricating a high voltage micro cell, which can easily form a plurality of unit cells on a single chip through electrolyte and air injection.

Micro-electromechanical system (MEMS) actuators, Lap on a chip (devices designed to conduct research that can be done in the lab) The electrostatic / piezoelectric drivers, valves and pumps used are driven by high voltages above 30V and low power in microsystems.

In addition, a power supply device, a DC / DC converter (for example, a voltage booster), and the like are required to drive a device requiring such a high voltage, and the power supply device's miniaturization technology is insignificant. Therefore, miniaturization of the power supply device having a high voltage in addition to the driver and the converter is urgently required for miniaturization of the entire micro driver system.

Conventional micro-cell technologies developed by such a need include US Patent Publication No. 2004-0191626 and US Patent No. 6,610,440.

US Patent Publication No. 2004-0191626 discloses a technique for improving the battery capacity through a three-dimensional lamination method. However, this patent seeks to improve the battery capacity at a voltage of 1.5V, so there is a drawback of having to reconnect in series to use a driver requiring a higher voltage.

U. S. Patent No. 6,610, 440 discloses a technique for a microcell that can be integrated and used in an electronic device and a microelectromechanical system driver. However, this patent requires the electrode to be formed through a multi-layer process, so wire connections between unit cells are required to produce voltages above 1.5V.

In addition, this patent is inconvenient to inject each electrolyte into the unit cell. Accordingly, there is a need for a microcell that can easily inject an electrolyte into a plurality of unit cells while applying a high voltage in a simple manner.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a high voltage micro battery having a plurality of unit battery cells connected by electrodes integrated on a single chip.

In addition, an object of the present invention is to provide a high-voltage micro-battery manufacturing method capable of forming a plurality of unit battery cells by only one injection of electrolyte and air injection.

According to one feature of the invention, the electrode layer is formed electrode pattern; Air outlets are formed at one side and a plurality of unit battery cells having a predetermined size, a central flow path connected to the unit battery cells, an injection hole formed at one end of the central flow path, and formed at the other end of the central flow path A flow path layer having an outlet port; And an electrolyte filled in each of the unit battery cells.

An air outlet of the high voltage microcell of the present invention is provided with a buffer space that is suddenly enlarged. Thus, when the buffer space is further formed in the air outlet, it is possible to minimize the leakage of the electrolyte.

In addition, the plurality of unit battery cells of the high voltage micro-battery of the present invention may be arranged to simultaneously fill the electrolyte flowing from the injection port. As such, when a plurality of unit battery cells are filled with electrolyte at the same time, a large capacity voltage can be obtained quickly.

In addition, the plurality of unit battery cells of the high voltage micro-battery of the present invention may be arranged to sequentially fill the electrolyte flowing from the injection hole. As such, when the electrolyte is sequentially filled in the plurality of unit battery cells, various voltages may be obtained according to time.

In addition, the present invention may vary the capacitance of the unit battery cell by varying the volume of the plurality of unit battery cells of the high voltage micro battery. As such, when the volumes of the plurality of unit battery cells are different, more various voltages can be obtained.

In addition, the injection hole of the high voltage microcell of the present invention may be divided so that the electrolyte and the air can be separately injected. In this way, when the electrolyte and the air are separated and injected, the electrolyte injection and the air injection process are faster and simpler.

In addition, an electrolyte storage space for accommodating an electrolyte may be further formed between the central channel of the high voltage microcell and the outlet of the present invention. Thus, by forming the electrolyte storage space in the outlet portion can minimize the amount of electrolyte leakage to the outside to reduce the contamination caused by the electrolyte.

In addition, the passage connecting the central flow path and the unit battery cell of the high voltage micro battery of the present invention may be wider than the passage connecting the central flow path and the electrolyte storage space. In this way, electrolyte flows smoothly into the unit battery cell.

In addition, the air outlet of the high voltage micro-cell of the present invention is preferably narrower than the passage connecting the central flow path and the electrolyte storage space. In this way, the amount of electrolyte discharged to the air outlet can be reduced.

In addition, the unit battery cells of the high voltage micro battery of the present invention may be arranged in a polygon. In this way, the space utilization can be increased, and the electric circuit can be configured in various ways.

In addition, the electrode layer of the high voltage micro-battery of the present invention may have a fine electrode pattern connecting the at least one pair of unit battery cells in series. In this way, a voltage higher than that of a unit battery cell can be obtained.

In addition, the electrode layer of the high voltage micro battery of the present invention may have a fine electrode pattern for connecting at least a pair of the unit battery cells in parallel. In this way, a larger capacitance than a unit battery cell can be obtained.

In addition, according to another feature of the present invention, a) a plurality of unit battery cells filled with an electrolyte, a central flow path connecting the plurality of unit battery cells, the injection hole in which the electrolyte or air is communicated to one end of the central flow path, And forming a flow path layer having a discharge port through which the electrolyte or air is discharged at the other end of the central flow path, b) bonding an electrode layer having an electrode pattern to the flow path layer, and c) injecting electrolyte through the injection hole. And filling the electrolyte into the unit cell and the central channel, and d) injecting air through the injection port to discharge the electrolyte filled in the central channel to the discharge port to form a plurality of unit cells. There is provided a method for producing a micro battery, characterized in that.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram schematically showing a coupling degree of a high voltage microcell and a connection state of unit cells of the microcell according to a first embodiment of the present invention, and FIG. 2 is a view illustrating a flow path layer of the microcell shown in FIG. 3 is a plan view of an electrode layer of the microcell shown in FIG. 1.

As shown in FIG. 1A, the microcell of the present invention is composed of an electrolyte injected into the flow path layer 100, an electrode layer 200, and the flow path layer 100.

The flow path layer 100 includes a plurality of unit battery cells 110, and the electrode layer 200 has an electrode pantone 220 connecting the unit battery cells 110. The unit battery cells 110 filled with electrolyte each serve as a unit battery having a predetermined voltage. The electrode layer 200 connects these unit cells in series, in series and in parallel to form one microcell having a high voltage.

The electrode layer 200 coupled to the flow path layer 100 connects the plurality of unit battery cells 110. Each electrode 210 serves as an anode and a cathode of the unit cell formed in the electrolyte and the unit battery cell 110, and the electrode pattern 220 serves as a circuit for connecting the unit battery cell 110. The electrode pattern 220 illustrated in FIG. 3 is a form in which the unit battery cells 110 of the flow path layer 100 illustrated in FIG. 2 are connected in series. Therefore, when the electrode layer 200 illustrated in FIG. 3 is bonded to the flow path layer 100 illustrated in FIG. 2, a circuit as shown in FIG. 1B is configured to form a microcell having a high voltage.

Next, the flow path layer 100 and the electrode layer 200 according to the present embodiment will be described in detail.

As shown in FIG. 2, a plurality of unit battery cells 110, a central flow path 120, an injection hole 130, and an discharge hole 140 are formed in the flow path layer 100. The unit battery cell 110 is arranged at regular intervals in the flow path layer 100. The unit battery cell 110 forms a predetermined closed space for accommodating the electrolyte. The unit battery cell 110 filled with the electrolyte serves as a unit battery having a predetermined voltage. Each unit battery cell 110 has an air outlet 112 in communication with the central channel 120 and the air filled therein can be discharged. In the air outlet 112, a buffer space 114 is formed to suddenly enlarge and prevent the electrolyte from flowing out.

The central channel 120 is connected to the plurality of unit battery cells 110. An injection port 130 is formed at one end of the central channel 120 and an outlet 140 is formed at the other end. The electrolyte and the air communicate with the inlet 130 and the outlet 140, respectively. Meanwhile, the fluid resistance increases the resistance of the fluid in the vicinity of the first outlet 122 and the second outlet 124 to which the unit battery cell 11, the central passage 120, the central passage 120, and the outlet 140 are connected. The protrusion 126 is formed.

The electrolyte introduced through the injection hole 130 is filled in each unit battery cell 110 and then exits to the discharge port 140. To this end, in the present invention, the cross-sectional area of the first outlet 122 to which the central passage 120 and the unit battery cell 110 are connected is the cross-sectional area of the second outlet 124 to which the central passage 120 and the outlet 140 are connected. Larger. In addition, as described above, the fluid resistance protrusion 126 is formed near the first outlet 122 and the second outlet 124 to increase the resistance of the fluid. In addition, when the cross-sectional area of the air outlet 112 is smaller than the second outlet 124 and the pressure is applied to the central channel 120 while the unit battery cell 110 is filled with electrolyte, the electrolyte is passed through the air outlet 112. It was not discharged.

As illustrated in FIG. 3, the electrode layer 200 is provided with a plurality of unit electrodes 210 and electrode patterns 220 connecting the unit electrodes 210 in an arbitrary circuit form. The electrode layer 200 connects a plurality of unit cells formed by the flow path layer 100 and the electrolyte in series, in series, or in parallel to generate a high voltage.

Next, an electrolyte is filled in the unit battery cell of the flow path layer 100 and separated by air based on FIG. 4. 4 is a schematic diagram illustrating a process of filling an electrolyte into a flow path layer shown in FIG. 2.

As shown in FIG. 4, the electrolyte 300 is injected through the injection hole 130 of the flow path layer 100. Then, the injected electrolyte 300 is simultaneously filled in each unit battery cell 110 while passing through the central channel 120. The air filled in the unit battery cell 110 and the central channel 120 is discharged through the air outlet 112 and the outlet 140, respectively.

When the electrolyte 300 is filled in all the unit battery cells 110, air is injected through the injection hole 130. The injected air pushes the electrolyte 300 filled in the central passage 120 and pushes it toward the outlet 140. At this time, as described above, since the cross-sectional area of the air outlet 112 is much smaller than the second outlet 124 leading to the outlet 140, all of the electrolyte filled in the central passage 120 is passed through the second outlet 124. Exit to outlet 140. When the air pressure injected through the injection hole 130 is large, some of the electrolyte 300 filled in the unit battery cell 110 may be discharged into the buffer space 114.

As such, the unit battery cells 110 filled with the electrolyte 300 and separated by the central channel 120 form unit cells each having a predetermined voltage. Therefore, according to the present invention, a high voltage microcell having a plurality of unit cells having a predetermined voltage can be manufactured on a single substrate through a simple process of electrolyte injection and air injection.

5 is a plan view showing a modification of the flow path layer.

Generally, since the electrolyte contains harmful components, it is not preferable to discharge the electrolyte to the outside of the flow path layer 100a. In view of this point, in the present modification, the electrolyte storage space 150 in which the electrolyte can be stored is formed at the outlet 140. In addition, the injection hole 130 is separated into a first injection hole 132 through which the electrolyte is injected and a second injection hole 134 through which the air is injected so that the electrolyte and the air can be separately injected.

When the flow path layer 100a is deformed in this manner, the filled electrolyte in the flow path 120 is moved to the electrolyte storage space 150 when the air is injected after the electrolyte is filled in the unit battery cell 110, thereby discharging the electrolyte. Minimize environmental pollution caused by In addition, since electrolyte and air are separately injected through the first inlet 132 and the second inlet 134, the electrolyte and the air injector and the injection process are simplified.

6 is a plan view showing another modification of the flow path layer, Figure 7 is a plan view showing another modification of the flow path layer.

In the flow path layer 100a of the above modification, the electrolyte is simultaneously filled in each unit battery cell 110 through the central flow path 120. However, in some cases, it is necessary to selectively use a different size of voltage by sequentially filling the electrolyte in the plurality of unit battery cells 110. 6 and 7 show the shape of the flow path layer for use in this case.

In the central flow path 120 of the flow path layer 100b according to this modification, the fluid resistance protrusions 126a, 126b, and 126c are formed at arbitrary intervals as shown in FIG. Each of the fluid resistance protrusions 126a, 126b, 126c disrupts the flow of electrolyte through the central channel 120 as in the case of the previous embodiment.

Therefore, when the electrolyte is injected into the injection hole 130, the electrolyte is blocked by the fluid resistance protrusions 126a, 126b, and 126c formed in the central flow path 120 to fill only some unit battery cells 110.

That is, when the electrolyte is injected into the injection hole 130, the flow of the electrolyte is disturbed by the first protrusion 126a, and only the three unit battery cells 110 formed from the injection hole 130 to the first protrusion 126a are allowed to enter the electrolyte. In total, three unit cells are formed.

If the electrolyte is continuously injected, the electrolyte is introduced to the second protrusion 126b, and the remaining three unit battery cells 110 are filled with electrolyte, thereby forming a total of six unit cells. In addition, when the electrolyte is further injected, the electrolyte is introduced to the third protrusion 126c, and the remaining two unit battery cells 110 are filled with electrolyte, thereby forming a total of eight unit cells. In this case, when the electrolyte and the air are alternately injected, the unit cells completed by the electrolyte and the unit battery cell 110 are separated, thereby becoming independent batteries. Therefore, according to this modification, the number of unit cells can be increased sequentially.

The flow path layer 100c shown in FIG. 7 is another form of the flow path layer serving as the above. As shown in FIG. 7, the flow path layer 100c of this modification has a unit battery cell 110 arranged in a polygonal shape and a central flow path 120 bent along the unit battery cell 110. Fluid resistance protrusions 126a, 126b, and 126c are formed at portions where the central channel 120 is bent to prevent the inflow of the electrolyte. In the flow path layer 100c of this modified example, since the fluid resistance protrusions 126a, 126b, and 126c are formed at the bent portion of the central flow path 120, separation injection of the electrolyte is performed smoothly.

FIG. 8 is a plan view illustrating a modified example of the electrode layer, and FIG. 9 is a coupling diagram of the high voltage microcell according to the second embodiment of the present invention formed by combining the flow path layer of FIG. 2 and the electrode layer of FIG. It is a circuit diagram which shows the connection state of the unit cells of a micro cell.

Since the electrode layer 200 described above connects all of the unit battery cells 110 of the flow path layer 100 in series, it is useful when manufacturing a micro battery having a high voltage. However, the micro-batteries of this type do not escape the capacitance of the unit battery cell 110 because the small capacity of the unit battery cells 110 are all connected in series.

The electrode layer 200a illustrated in FIG. 8 is a form in view of such a point, and connects the unit battery cell 110 of the flow path layer 100 illustrated in FIG. 2 in a mixed form in parallel and in series. That is, the electrode layer 200a of the present embodiment connects five pairs of unit battery cells 110 of the flow path layer 110 shown in FIG. 2 in series as shown in FIG. The pair of unit battery cells 110 are connected in parallel to form a micro battery of the circuit form shown in FIG. The micro battery formed as described above has an advantage of having a higher voltage and an electric capacity than the unit battery cell 110.

According to the present invention, electrolyte can be injected into a plurality of unit battery cells at the same time through a flow path layer, and the unit battery cells can be separated by injecting air into the flow path layer. It can be used as a single cell capable of generating a unit voltage, and at the same time it can be used as a high voltage cell because the voltage magnitude can be adjusted through the sum of potentials.

In addition, the present invention can obtain a variety of high voltages and various types of voltage by connecting a plurality of unit battery cells in series or a mixture of series / parallel by adjusting the pattern of the electrode layer.

In addition, the present invention can change the shape of the flow path to inject the electrolyte into a plurality of unit battery cells at the same time or sequentially, through which it is possible to control the increase in voltage or current of the micro-battery over time.

Although the technical idea of the high voltage micro-cell and the manufacturing method thereof have been described together with the accompanying drawings, this is illustrative of the best embodiments of the present invention and is not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (13)

An electrode layer on which electrode patterns are formed; Air outlets are formed at one side and a plurality of unit battery cells having a predetermined size, a central flow path connected to the unit battery cells, an injection hole formed at one end of the central flow path, and formed at the other end of the central flow path A flow path layer having an outlet port; And A high voltage micro battery comprising an electrolyte filled in each of the unit battery cells. The high voltage micro-cell of claim 1, wherein a buffer space for storing the leaked fluid is further formed at the air outlet. The high voltage micro battery of claim 1, wherein the plurality of unit battery cells are arranged to simultaneously fill the electrolyte flowing from the injection hole. The high voltage micro battery of claim 1, wherein the plurality of unit battery cells are arranged to sequentially fill the electrolyte flowing from the injection hole. The high voltage micro-battery of claim 1, wherein the capacitance of the unit battery cells is varied by varying the volumes of the plurality of unit battery cells. The high voltage micro-cell of claim 1, wherein the inlet is divided so that the electrolyte and the air can be separately injected. The high voltage micro-cell of claim 1, further comprising an electrolyte storage space for accommodating an electrolyte between the central channel and the outlet. The high voltage micro battery of claim 1, wherein a passage connecting the central passage and the unit battery cell is wider than a passage connecting the central passage and the discharge port. The high voltage micro-cell of claim 8, wherein the air outlet is narrower than a passage connecting the central passage and the outlet. The high voltage micro battery according to any one of claims 1 to 9, wherein the plurality of unit battery cells are arranged in a polygon. The high voltage microcell according to any one of claims 1 to 9, wherein the electrode layer has a fine electrode pattern for connecting at least one pair of the unit battery cells in series. 12. The high voltage microcell of claim 11, wherein the electrode layer has a fine electrode pattern for connecting at least one pair of the unit battery cells in parallel. a) a plurality of unit battery cells filled with an electrolyte, a central channel connecting the plurality of unit battery cells, an inlet through which electrolyte or air is communicated at one end of the central channel, and an electrolyte at the other end of the central channel; Forming a flow path layer having an outlet through which air is discharged; b) bonding an electrode layer having an electrode pattern to the flow path layer; c) injecting electrolyte through the injection hole to fill electrolyte in the unit battery cell and the central channel; and d) forming a plurality of unit cells by injecting air through the inlet to discharge the electrolyte filled in the central flow path to the outlet;

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