KR20090026420A - Rechageable battery and manufacturing method thereof - Google Patents

Abstract

A secondary battery is provided to prevent an RFID antenna and a circuit board from being disconnected or pressed down and to realize the optimum size. A secondary battery includes a bare cell(100), a circuit board, a resin part(300), and a radio frequency identification antenna(RFID antenna)(400). The circuit board comprises an antenna terminal(230) and is electrically connected to the bare cell. The resin part covers the circuit board and has an antenna connector exposing at least a part of the antenna part. The RFID antenna has an antenna lead(410) connected to the antenna terminal exposed to the antenna connector and is installed at one side of the bare cell.

Description

Secondary battery and its manufacturing method {RECHAGEABLE BATTERY AND MANUFACTURING METHOD THEREOF}

The present invention relates to a secondary battery and a method of manufacturing the same, and more particularly, to a secondary battery including a radio frequency identification antenna (RFID ANTENNA) and a method of manufacturing the same.

In general, a secondary battery is formed by stacking a positive electrode plate, a negative electrode plate, and a separator, and storing the wound electrode assembly together with an electrolyte in a can formed of aluminum or an aluminum alloy, and sealing the top opening of the can with a cap assembly.

The secondary battery is exposed to a risk that the battery ruptures due to a sudden voltage increase in the case of an internal short circuit due to an external short circuit or a mechanical shock, or an overcharge or overdischarge. In order to alleviate such risks, a secondary battery typically includes a protective circuit board and a bare cell that include safety devices such as a positive temperature element (PTC) and a thermal fuse. It is sealed while being connected to the end, and is completed in the form of a battery pack. In this case, the protective circuit board is connected to the positive and negative terminals of the bare cell by a conductor structure called a lead plate, and when the voltage of the battery rises rapidly due to high temperature rise or excessive charge and discharge of the battery, the current is cut off. Prevent risks such as rupture. The protective circuit board is formed of a circuit on a panel made of resin, and an external terminal or the like is formed on an outer surface thereof. A circuit part is provided on the inner side of the protective circuit board and is electrically connected to the connection terminal. In addition, a lead and an insulation plate may be disposed between the bare cell and the protection circuit board.

The battery pack is classified into two types according to the external form. That is, a hard pack battery in which a plastic resin housing is integrally molded on the outer surface of the battery while the external terminal electrically connected to the external device is exposed, and the plastic resin on the outer surface of the battery with the external terminal exposed. There is an inner pack battery in which the housing is not molded separately.

In such a battery pack, a protective circuit board is disposed in parallel with a surface on which a bare cell electrode terminal is formed, and a gap between the bare cell and the protective circuit board is filled by molding of a hot melt resin. In this case, the hot melt resin may cover the outer surface of the protective circuit board, but the external terminal is exposed to the outside.

Meanwhile, a radio frequency identification antenna (RFID ANTENNA) is connected to the protection circuit board to transmit and process information of a thing and surrounding environment information at a radio frequency.

In the conventional secondary battery, the antenna lead of the RFID ANTENNA is first connected to an antenna terminal formed on the protective circuit board, and then the coupling thereof is fixed by molding of the hot melt resin. The hot melt resin acts as an external force on the coupling portion of the RF ANTENNA and the protection circuit board, thereby causing disconnection or crushing at the coupling portion of the RF ANTENNA and the protection circuit board, thereby making an electrical connection. There is a problem that makes it bad.

In addition, since the molding of the hot melt resin proceeds to cover the exposed RF antenna after the RF ANTENNA and the protection circuit board are combined, the volume of the battery becomes large, and accordingly, There is a problem that the capacity is reduced.

An object of the present invention is to provide a secondary battery and a method of manufacturing the same, which can prevent disconnection or crushing between a radio frequency identification antenna (RFID ANTENNA) and a circuit board.

In addition, an object of the present invention is to provide a secondary battery capable of having an optimum size and a method of manufacturing the same.

In order to achieve the above object, a secondary battery according to the present invention includes a bare cell; A circuit board including an antenna terminal and electrically connected to the bare cell; A resin part formed to cover the circuit board and having an antenna connection part exposing at least a part of the antenna terminal; And an antenna lead connected to the antenna terminal exposed to the antenna connection unit, and includes an RF ANTENNA installed on one side of the bare cell.

The resin part may be formed between the bare cell and the circuit board and on an upper surface of the circuit board.

The antenna connection part may include an antenna terminal exposure hole formed on an upper surface of the resin part and an antenna through hole formed on a side surface of the resin part, and the antenna lead may pass through the antenna through hole and be disposed at the antenna terminal exposure hole. It can be coupled by welding with the antenna terminal.

In addition, the antenna connection portion is formed in the shape of a groove that enters from the top and side of the resin portion inside the top and side of the resin portion, and is made of a stepped portion formed so that the antenna terminal is exposed to the top surface of the resin portion, The antenna lead may be coupled by welding to the antenna terminal exposed to the stepped portion on an upper surface of the resin portion.

In addition, the antenna connection portion is formed in the side of the resin portion to form a coupling hole for exposing the antenna terminal, the antenna lead is inserted into the coupling hole to be coupled by welding with the antenna terminal at the side of the resin portion. Can be.

The radio frequency identification antenna may be a loop antenna. An insulation member may be interposed between the loop antenna and the bare cell to prevent a short circuit. The insulating member may be made of an insulating tape.

The radio frequency identification antenna and the bare cell may be covered by a label.

In order to achieve the above object, a method of manufacturing a secondary battery according to the present invention includes the steps of: forming a core pack by combining a bare board with a circuit board having an antenna terminal; Molding the core pack with a resin to form a resin part covering the circuit board, wherein forming an antenna connection part exposing at least a part of the antenna terminal of the circuit board to the resin part; And installing a radio frequency identification antenna (RFID ANTENNA) having an antenna lead on one side of the bare cell, and connecting the antenna lead to the antenna terminal.

The method of manufacturing a secondary battery according to the present invention may further include covering the radio frequency identification antenna and the bare cell by a label after installing the radio frequency identification antenna on one side of the bare cell. .

In the secondary battery according to the present invention, a radio frequency identification antenna (RFID ANTENNA) is combined with a circuit board through an antenna connection part of a preformed resin part, whereby a conventional radio frequency identification antenna is first coupled to the circuit board and covered by the resin part. In this case, it is possible to prevent disconnection or depression of the radio frequency identification antenna.

In addition, the secondary battery according to the present invention has the effect that it can have an optimal size added only the size of the radio frequency identification antenna.

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

1A is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention, FIG. 1B is an exploded perspective view of a bare cell and a circuit member of the rechargeable battery of FIG. 1A, and FIG. 1C is a combined perspective view of the bare cell and a circuit member of FIG. 1B. 1D is a perspective view showing a secondary battery in a state before the label of FIG. 1A is attached, and FIGS. 2A and 2B are schematic views of the RFID ANTENNA shown in FIG. 1D.

1A to 1D, a secondary battery 600 according to an embodiment of the present invention may include a bare cell 100, a circuit board 200, a resin unit 300, and an RF antenna 400. ), And a label 500. The secondary battery 600 is formed by combining the radio frequency identification antenna 400 with the circuit board 200 through the antenna connection portion of the pre-formed resin unit 300, whereby the radio frequency identification antenna 400 is first a circuit board ( When coupled to the 200 and covered by the resin unit 300 to prevent the disconnection or pressing of the radio frequency identification antenna 400 that may occur in the coupling portion of the radio frequency identification antenna 400 and the circuit board 200. There is an action.

First, the bare cell 100 of the secondary battery 600 according to an embodiment of the present invention will be described.

Referring to FIG. 1B, the bare cell 100 may include an electrode assembly 10, a case 20 in which the electrode assembly 10 and an electrolyte (not shown) are accommodated, and an upper opening of the case 20. And a cap assembly 30 for sealing.

The electrode assembly 10 is formed by winding a positive electrode 11, a negative electrode 12, a separator 13 interposed between the positive electrode 11 and the negative electrode 12 in a thin plate shape or a film shape.

The positive electrode 11 includes a positive electrode current collector made of a thin metal plate having excellent conductivity, such as aluminum foil, and a positive electrode active material layer mainly composed of lithium-based oxides coated on both surfaces thereof. The positive electrode tab 14 is electrically connected to a region of the positive electrode current collector in which the positive electrode active material layer is not formed.

The negative electrode 12 includes a negative electrode current collector made of a conductive metal sheet, such as a copper foil, and a negative electrode active material layer mainly composed of a carbon material coated on both surfaces thereof. The negative electrode tab 15 is also connected to a region of the negative electrode current collector in which the negative electrode active material layer is not formed.

The positive electrode 11 and the negative electrode 12 may be arranged with different polarities. Insulating tapes 18 are wound around the boundary portions from which the positive electrode tab 14 and the negative electrode tab 15 are drawn out of the electrode assembly 10 to prevent a short circuit between the two electrodes 11 and 12.

The separator 13 is made of polyethylene, polypropylene, or a copolymer of polyethylene and polypropylene. The separator 13 is formed to be wider than the positive electrode 11 and the negative electrode 12, which is advantageous in preventing short circuit between the electrode plates.

The case 20 is formed of aluminum or an aluminum alloy having a substantially rectangular parallelepiped shape. The electrode assembly 10 is accommodated through the open top of the case 20 so that the case 20 serves as a container of the electrode assembly 10 and the electrolyte solution. The case 20 may itself serve as a terminal, and in this embodiment, the cap plate 31 of the cap assembly 30, which is coupled to the case 20 by welding, serves as a positive electrode terminal. Done.

The cap assembly 30 includes the cap plate 31, the gasket 34, the insulating plate 35, the terminal plate 36, and the electrode terminal 37.

The cap plate 31 is formed in a flat shape having a size and shape corresponding to the open upper end of the case 20. The through hole 32 for the terminal is formed at the center of the cap plate 31 so that the electrode terminal 37 can pass therethrough. In addition, an electrolyte injection hole 33 for injecting an electrolyte is formed at one side of the cap plate 31. A stopper 50 is installed in the electrolyte injection hole 33 to seal the electrolyte injection hole 33 after the electrolyte is injected into the case 20.

The gasket 34 is installed in the shape of a tube to electrically insulate the electrode terminal 37 from the cap plate 31 outside the electrode terminal 37 passing through the central portion of the cap plate 31.

The insulating plate 35 is disposed on the lower surface of the cap plate 31 to insulate the cap plate 31 from the terminal plate 36.

The terminal plate 36 is disposed on the lower surface of the insulating plate 35 and electrically connected to the electrode terminal 37.

The electrode terminal 37 is inserted through the terminal hole 32 while the gasket 34 surrounds the outer circumferential surface thereof. A bottom portion of the electrode terminal 37 is electrically connected to the terminal plate 36 in a state of interposing the insulating plate 35. Here, the electrode terminal 37 serves as a negative electrode terminal. Of course, according to the embodiment, the cap plate 31 serving as the positive electrode terminal and the electrode terminal 37 serving as the negative electrode terminal may have different polarities from each other. The negative electrode tab 15 drawn from the negative electrode 12 is welded to the lower end of the electrode terminal 37 in a meandering state, and the lower surface of the cap plate 31 is drawn from the positive electrode 11. The positive electrode tab 14 is welded.

On the other hand, the upper surface of the electrode assembly 10 for the electrical insulation of the electrode assembly 10 and the cap assembly 30, and at the same time to cover the upper end of the electrode assembly (10) 40) is installed. A negative electrode tab hole 41 is formed in the center of the insulating case 40 to allow the negative electrode tab 15 to pass therethrough, and a positive electrode tab hole 42 is formed at one side to allow the positive electrode tab 14 to pass therethrough. Is formed. In addition, an electrolyte passage hole 43 serving as a flow path of an electrolyte (not shown) is formed at the other side of the insulating case 40.

 Having the structure as described above, the bare cell battery 100 is completed by welding the peripheral portion of the cap plate 31 and the side wall of the case 20 to be welded to each other. The completed bare cell 100 is electrically connected to the circuit board 200 through lead plates 70 and 80, as shown in FIG. 1C.

The lead plates 70 and 80 are divided into an anode lead plate 70 serving as an anode and a cathode lead plate 80 serving as a cathode.

The anode lead plate 70 is electrically connected to one side of the cap plate 31 by welding or the like, and the cathode lead plate 80 has one side of the electrode terminal 37 serving as a cathode terminal. It is connected by welding or the like and is electrically connected. In this case, when the negative lead plate 80 and the electrode terminal 37 are connected, the negative electrode lead is electrically insulated between the negative lead plate 80 and the cap plate 31 serving as the positive electrode terminal. An insulating plate 60 formed of an adhesive tape is further provided between the plate 80 and the cap plate 31. Accordingly, the negative lead plate 80 is attached to the insulating plate 60 and is electrically connected to the electrode terminal 37 of the bare cell 100. The anode lead plate 70 and the cathode lead plate 80 may be made of a conductive material, for example, nickel, nickel alloy, or nickel plated stainless steel. As such, the positive lead plate 70 and the negative lead plate 80 electrically connected to the bare cell 100 may be electrically connected to the circuit board 200 by welding or the like.

The circuit board 200 is formed in a plate shape made of a resin, and a protection circuit such as a circuit (not shown) for uniformizing the state of charge by controlling charging and discharging with respect to a battery, or a circuit for preventing over-discharge and overcharging ( Not shown) is formed. Although not shown in the drawings, circuit elements 200 are formed on the circuit board 200 to implement charge and discharge circuits (not shown) and protection circuits (not shown).

The circuit board 200 includes an external input / output terminal 210 for electrically connecting the circuit board 200 and an external electronic device (not shown) on one side of the upper surface, and labels the secondary battery on the other side of the upper surface with a label. Before completion, the test terminal 220 is provided to perform a performance test of the secondary battery, and has an antenna terminal 230 connected to the radio frequency identification antenna 400 to be described later in the center of the upper surface.

The circuit board 200 includes a cathode connection terminal 240 and a cathode connection terminal 250 for electrical connection with the bare cell 100 on a lower surface thereof. The positive electrode terminal 240 and the negative electrode terminal 250 are approximately 'L' shaped for electrical connection with the positive electrode lead plate 70 and the negative electrode lead plate 80 installed on the cap plate 31. It is formed into a structure. The lead plates 70 and 80 and the connection terminals 240 and 250 are generally joined by spot welding.

 The bare cell 100 and the circuit board 200 having the above structure are electrically connected through the lead plates 70 and 80 to form a core pack battery, and the core pack battery is a resin part 300. And a radio frequency identification antenna 400.

The resin part 300 is formed by filling and molding a hot melt resin in a gap between the bare cell 100 and the circuit board 200. In this case, the resin part 300 is formed to cover the circuit board 200. In other words, the resin part 300 is formed between the bare cell 100 and the circuit board 200 and on the upper surface of the circuit board 200.

In detail, the resin part 300 has an outer surface corresponding to an upper surface 310 of the circuit board 200 and an edge portion of the upper surface 310 in the direction of the bare cell 100 to the circuit board 200. And a side surface 320 formed to cover the side surface thereof.

As illustrated in FIG. 1D, the upper surface 310 of the resin portion 300 is a portion in which resin is formed to cover the upper surface of the circuit board 200. An external input / output terminal portion exposing hole 311 is formed on one side of the upper surface 310 to expose the external input / output terminal portion 210, and through the external input / output terminal portion exposing hole 311, the circuit board 200 and the circuit board 200 are exposed. External electronics can be electrically connected. In addition, a test terminal exposure hole 312 for exposing the test terminal 220 is formed at the other side of the upper surface 310, and the battery using the test terminal 220 through the test terminal exposure hole 312. The performance test of can be conducted. In addition, an antenna terminal exposure hole 313 for exposing the antenna terminal 230 is formed at the center of the upper surface 310. Through the antenna terminal exposure hole 313, welding of the antenna terminal 230 and the radio frequency identification antenna 400 may be performed.

As shown in FIG. 1D, the side surface 320 of the resin part 300 is a portion in which resin is formed to cover the side surface of the circuit board 200. An antenna through hole for inserting the radio frequency identification antenna 400 into an area corresponding to the antenna terminal exposure hole 313 among the side surfaces 320 of the resin part 300 to connect to the antenna terminal 230 ( 321 is formed.

The antenna terminal exposure hole 313 formed in the upper surface 310 of the resin part 300 and the antenna through hole 321 formed in the side surface 320 of the resin part 300 are the antenna terminal 230. Exposing at least a portion of the antenna terminal 230 and the radio frequency identification antenna 400 to form an antenna connection portion.

The radio frequency identification antenna 400 is electrically connected to the circuit board 200 through the antenna connection unit, and electrically connects the circuit board 200 and an external electronic device (wireless terminal) through the radio frequency. Accordingly, the radio frequency identification antenna 400 transmits identification information such as the type, form, and release date of the secondary battery 600 from the circuit board 200 to an external electronic device (wireless terminal) through a radio frequency. The external electronic device (wireless terminal) may recognize the information of the secondary battery 600. However, the present invention does not limit the radio frequency identification function of the radio frequency identification antenna 400.

Specifically, the RF antenna 400 is coupled to one side of the bare cell 100, and an antenna lead 410 extending from one edge of the RF antenna 400 may include a circuit board 200. It is electrically connected to the circuit board 200 by welding to the antenna terminal 230 of the. In other words, the antenna lead 410 is welded and coupled to the antenna terminal 230 exposed through the antenna through hole 321 and exposed to the antenna terminal exposure hole 313, whereby the radio frequency identification antenna 400 and the circuit board 200 is electrically connected. Here, welding for electrical connection between the antenna lead 410 and the antenna terminal 230 is performed on the upper surface 310 of the resin part 300.

As shown in FIGS. 2A and 2B, an antenna line is wound several times on a plastic resin substrate, and an antenna lead 410 is formed at an upper end of the RF antenna 400. The base material is a thin plate-like material, it may be gently bent in accordance with the shape of the portion to which the radio frequency identification antenna 400 is attached. On the other hand, the radio frequency identification antenna 400 is shown as a loop antenna in the embodiment of the present invention, but can be used both the chip-type antenna and other antennas of the structure is not limited to the type of antenna in the present invention.

Meanwhile, an insulating member 450 may be installed between the radio frequency identification antenna 400 and the bare cell 100 to prevent an electrical short circuit, and the insulating member 450 may be made of an insulating tape. have.

After coupling the resin unit 300 and the radio frequency identification antenna 400 to the core pack formed by coupling the bare cell 100 and the circuit board 200 as described above, the bare cell 100 and the radio frequency identification antenna ( When the label 500 is attached to cover 400, the secondary battery 600 is completed.

Referring to FIG. 1A, the label 500 is integrally formed on the outer surface of the bare cell 100 and the antenna through hole 321 to cover the bare cell 100 and the radio frequency identification antenna 400. In addition, a label 510 is separately attached to the antenna terminal exposure hole 312. In addition, a label 520 is separately attached to the test terminal exposing hole 313 to prevent the test terminal 220 from being exposed after the battery performance test through the test terminal 220.

As described above, the secondary battery 600 according to an embodiment of the present invention, the antenna through hole 321 and the antenna terminal exposed hole 313 of the resin portion 300 formed after the resin portion 300 is formed in the core pack. Since the radio frequency identification antenna 400 and the antenna terminal 230 of the circuit board 200 are electrically connected to each other, the radio frequency identification antenna is first combined with the circuit board and covered by the resin part. It is possible to prevent the disconnection and depression of the radio frequency identification antenna that occurred in the case.

In addition, the secondary battery 600 according to an embodiment of the present invention, after the resin portion 300 is formed in the core pack, the radio frequency identification antenna 400 is coupled and exposed to one side of the bare cell 100. Since the radio frequency identification antenna 400 is covered by the label 500 having a thin thickness, the radio frequency identification antenna is first combined with the circuit board, and the exposed radio frequency identification antenna is relatively thicker than the label. It is possible to reduce the volume of the battery than when covered by. Therefore, the secondary battery 600 according to an embodiment of the present invention may increase the capacity to volume in the radio frequency identification antenna 400.

Next, a secondary battery according to another embodiment of the present invention will be described.

3A is a perspective view of a rechargeable battery according to another exemplary embodiment of the present invention, and FIG. 3B is a perspective view illustrating the rechargeable battery in a state before the label of FIG. 3A is attached.

Secondary battery according to another embodiment of the present invention has the same components as the secondary battery according to an embodiment of the present invention, the only difference in the configuration of the resin portion and the label as compared to the secondary battery according to an embodiment of the present invention Like reference numerals designate like elements and duplicate descriptions will be omitted. Accordingly, in another embodiment of the present invention, the resin portion and the label of the secondary battery having a difference from one embodiment of the present invention will be described.

3A and 3B, a secondary battery 1600 according to another exemplary embodiment of the present invention may include a bare cell 100, a circuit board 200, a resin unit 1300, and an RF antenna 400. ), And a label 1500.

The resin part 1300 is formed by filling and molding a hot melt resin in a gap between the bare cell 100 and the circuit board 200. In this case, the resin part 1300 is formed to cover the circuit board 200.

Specifically, the resin unit 1300 may have an outer surface 1310 corresponding to an upper surface of the circuit board 200 and an edge portion of the upper surface 1310 toward the bare cell 100 in the direction of the bare substrate 100. And a side surface 1320 formed to cover the side surface thereof.

As illustrated in FIG. 3B, the upper surface 1310 of the resin part 1300 is a part in which resin is formed to cover the upper surface of the circuit board 200. An external input / output terminal part exposing hole 311 is formed on the top surface 1310 of the resin part 1300 to expose the external input / output terminal part 210, and through the external input / output terminal part exposing hole 311, the circuit board 200 and the external electronic device may be electrically connected. In addition, a test terminal exposing hole 312 for exposing the test terminal 220 is formed on the upper surface 1310 of the resin part 1300, and the test terminal 220 is provided through the test terminal exposing hole 312. The performance test of the battery using) can be carried out.

As shown in FIG. 3B, the side surface 1320 of the resin unit 1300 is a portion in which resin is formed to cover the side surface of the circuit board 200.

The resin part 1300 is formed in the shape of a groove which enters from the upper surface 1310 and the side surface 1320 of the resin part 1300 over the upper surface 1310 and the side surface 1320 of the resin part 1300. The upper surface 1310 of the resin part 1300 includes a stepped part 1330 formed to expose the antenna terminal 230 of the circuit board 200.

The stepped portion 1330 exposes at least a portion of the antenna terminal 230 to form an antenna connection portion connecting the antenna terminal 230 and the radio frequency identification antenna 400. That is, the antenna lead 410 of the radio frequency identification antenna 400 coupled to one side of the bare cell 100 is connected to the antenna terminal 230 of the circuit board 200 exposed through the stepped portion 1330. Electrically connected. Here, the electrical connection between the antenna lead 410 and the antenna terminal 230 is made by welding on the upper surface 1310 of the resin portion 1300.

On the other hand, between the radio frequency identification antenna 400 and the bare cell 100 may be provided with an insulating member 450 to prevent an electrical short, the insulating member 450 may be made of an insulating tape. .

After combining the resin unit 1300 and the radio frequency identification antenna 400 to the core pack formed by coupling the bare cell 100 and the circuit board 200 as described above, the bare cell 100 and the radio frequency identification antenna ( When the label 1500 is attached to cover 400, the secondary battery 1600 is completed.

Referring to FIG. 3A, the label 1500 is integrally attached to the outer surface of the bare cell 100 and the stepped portion 1330 to cover the bare cell 100 and the radio frequency identification antenna 400. . In addition, a label 1510 is separately attached to the test terminal exposing hole 313 to prevent the test terminal 220 from being exposed after the battery performance test through the test terminal 220.

As described above, the secondary battery 1600 according to another embodiment of the present invention, the antenna connection portion to the stepped portion 1330 of the groove shape that enters the interior from the upper surface 1310 and side surface 1320 of the resin portion 1300. Since the radio frequency identification antenna 400 and the antenna terminal 230 of the circuit board 200 are electrically connected through the antenna connection portion, the total height compared to the secondary battery according to an embodiment of the present invention. There is an advantage to reduce.

Next, a secondary battery according to another embodiment of the present invention will be described.

Figure 4a is a perspective view of a secondary battery according to another embodiment of the present invention, Figure 4b is a perspective view showing a secondary battery before the label of Figure 4a is attached.

Secondary battery according to another embodiment of the present invention is different from the secondary battery according to an embodiment of the present invention, but only the configuration of the resin portion, the wireless antenna antenna, and the label secondary battery according to an embodiment of the present invention Since it has the same components and the same reference numerals for the same components and duplicate description will be omitted. Accordingly, in another embodiment of the present invention, the resin portion, the wireless antenna identification antenna and the label of the secondary battery having a difference from one embodiment of the present invention will be mainly described.

4A and 4B, a rechargeable battery 2600 according to another exemplary embodiment of the present invention may include a bare cell 100, a circuit board 200, a resin part 2300, and an RF antenna 2400. ), And a label 2500.

The resin part 2300 is formed by filling and molding a hot melt resin in a gap between the bare cell 100 and the circuit board 200. In this case, the resin part 2300 is formed to cover the circuit board 200.

In detail, the resin part 2300 may have an outer surface 2310 corresponding to the top surface of the circuit board 200 and an edge portion of the top surface 2310 toward the bare cell 100 in the direction of the bare substrate 100. And a side surface 2320 formed to cover the side surface thereof.

As illustrated in FIG. 4B, the upper surface 2310 of the resin portion 2300 is a portion in which resin is formed to cover the upper surface of the circuit board 200. An external input / output terminal part exposing hole 311 is formed on the upper surface 2310 of the resin part 2300 to expose the external input / output terminal part 210, and through the external input / output terminal part exposing hole 311, the circuit board 200 and the external electronic device may be electrically connected. In addition, a test terminal exposing hole 312 for exposing the test terminal 220 is formed on the top surface 2310 of the resin part 2300, and the test terminal 220 is provided through the test terminal exposing hole 312. The performance test of the battery using) can be carried out.

As shown in FIG. 3B, the side surface 2320 of the resin portion 2300 is a portion in which resin is formed to cover the side surface of the circuit board 200. A coupling hole 2321 for exposing the antenna terminal 230 is formed in a side surface 2320 of the resin part 2300.

The coupling hole 2321 exposes at least a portion of the antenna terminal 230 to form an antenna connection portion connecting the antenna terminal 230 to the radio frequency identification antenna 2400. That is, the antenna lead 2410 of the radio frequency identification antenna 2400 coupled to one side of the bare cell 100 is connected to the antenna terminal 230 of the circuit board 200 exposed through the coupling hole 2321. Electrically connected. Here, although the coupling hole 2321 is formed in a square shape, the coupling hole 2321 does not limit the plane shape of the coupling hole. In addition, electrical connection between the antenna lead 410 and the antenna terminal 230 is made by welding at the side surface 2320 of the resin part 2300.

The radio frequency identification antenna 2400 is coupled to one side of the bare cell 100 and includes an antenna lead 2410 inserted into the coupling hole 2321 and coupled to the antenna terminal 230 by welding. The antenna lead 2410 is bent twice from the edge of the radio frequency identification antenna 400 to be in surface-contact with the antenna terminal 230 for easy welding with the antenna terminal 230 in the coupling hole 2321. Is formed.

Meanwhile, an insulating member 2450 may be installed between the radio frequency identification antenna 2400 and the bare cell 100 to prevent an electrical short circuit, and the insulating member 2450 may be formed of an insulating tape. .

After combining the resin unit 2300 and the radio frequency identification antenna 2400 to the core pack formed by coupling the bare cell 100 and the circuit board 200 as described above, the bare cell 100 and the radio frequency identification antenna ( When the label 2500 is attached to cover the 2400, the secondary battery 2600 is completed.

Referring to FIG. 4A, the label 2500 is integrally attached to the outer surface of the bare cell 100 and the coupling hole 2321 to cover the bare cell 100 and the radio frequency identification antenna 2400. . In addition, a label 2510 is separately attached to the test terminal exposing hole 313 to prevent the test terminal 220 from being exposed after the battery performance test through the test terminal 220.

As described above, in the secondary battery 2600 according to another embodiment of the present invention, the coupling hole 2321 in which the antenna lead 2410 of the radio frequency identification antenna 2400 is formed in the side surface 1320 of the resin part 2300. In this case, the lead of the RF antenna in the secondary battery according to an embodiment of the present invention and the secondary battery according to another embodiment of the present invention is electrically connected to the antenna terminal 230 of the circuit board 200. Shorter length antenna leads can be used than if they are electrically connected to the antenna terminals of the circuit board on the top of the branch. Therefore, the secondary battery 2600 according to another embodiment of the present invention has an advantage of reducing the manufacturing cost for the radio frequency identification antenna.

Next, a method of manufacturing a secondary battery having the configuration as described above will be described.

5 is a flowchart illustrating a method of manufacturing a rechargeable battery according to an embodiment of the present invention.

Referring to FIG. 5, a method of manufacturing a secondary battery according to an embodiment of the present invention includes a core pack forming step (S510), a resin forming step (S520), and a radio frequency identification antenna connecting step (S530). In addition, the secondary battery manufacturing method according to an embodiment of the present invention further includes a labeling step S540.

1B and 1C, the core pack forming step S510 may include an electrode assembly 10, a case 20 in which the electrode assembly 10 is accommodated, and an upper opening of the case 20. A step of coupling the bare cell 100 including the cap assembly 30 to be sealed and the circuit board 200 provided with the antenna terminal 230 is provided.

The resin part forming step (S520) is a step of forming a resin part covering at least a part of the core pack by molding the core pack with a resin. In this case, the resin part is processed in advance in the mold includes an antenna connection portion for exposing at least part of the antenna terminal 230 of the circuit board 200.

As shown in FIG. 1D, the antenna connection part includes an antenna terminal exposure hole 313 and the resin part 300 formed to expose the antenna terminal 230 on an upper surface 310 of the resin part 300. An antenna lead hole 321 formed to penetrate the antenna lead 410 of the radio frequency identification antenna 400 may be formed on the side surface 320 of the antenna 320. In addition, the antenna connection portion, as shown in Figure 3b, is formed over the upper surface 1310 and the side surface 1320 of the resin portion 1300 to expose the antenna terminal 230 to the upper surface 1310. The stepped portion 1330 may be formed. In addition, as shown in FIG. 4B, the antenna connection part may include a coupling hole 2321 formed to expose the antenna terminal 210 on the side surface 2320 of the resin part 2300.

The RFID ANTENNA connection step (S530) is a step of installing a radio frequency identification antenna on one side of the bare cell 100, but connecting an antenna lead to the antenna terminal 230.

As shown in FIG. 1D, the antenna lead 410 is inserted into the antenna through hole 321 and coupled to the antenna terminal 230 by welding at the antenna terminal exposure hole 313, or FIG. 3B. As shown in FIG. 4, the antenna terminal 230 exposed to the stepped portion 1330 is welded or as shown in FIG. 4B, and the antenna terminal 230 is inserted into the coupling hole 2321. ) And by welding.

The labeling step (S540) is a step of covering the radio frequency identification antenna and the bare cell 100 by a label after installing the radio frequency identification antenna on one side of the bare cell 100.

That is, as shown in FIG. 1A, the label 500 is integrated on the outer surface of the bare cell 100 and the antenna through hole 321 to cover the bare cell 100 and the radio frequency identification antenna 400. Also, the label 510 is separately attached to the antenna terminal exposure hole 312. In addition, a label 520 is separately attached to the test terminal exposing hole 313 to prevent the test terminal 220 from being exposed after the battery performance test through the test terminal 220.

In addition, as shown in FIG. 3A, the label 1500 is integrally formed on the outer surface of the bare cell 100 and the stepped portion 1330 to cover the bare cell 100 and the radio frequency identification antenna 400. Attached. In addition, a label 1510 is separately attached to the test terminal exposing hole 313 to prevent the test terminal 220 from being exposed after the battery performance test through the test terminal 220.

In addition, as shown in FIG. 4A, the bare cell 100 and the radio frequency identification antenna 2400 are integrally attached to the outer surface of the bare cell 100 and the coupling hole 2321 to cover the radio frequency identification antenna 2400. In addition, a label 2510 is separately attached to the test terminal exposing hole 313 to prevent the test terminal 220 from being exposed after the battery performance test through the test terminal 220.

The present invention is not limited to the technical spirit of the specific embodiments or drawings described above, and those skilled in the art without departing from the gist of the invention claimed in the claims Various modifications are possible, of course, and such changes are within the scope of the claims of the present invention.

1A is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention.

1B is an exploded perspective view of a bare cell and a circuit member of the rechargeable battery of FIG. 1A.

FIG. 1C is a perspective view illustrating a bare cell and a circuit member of FIG. 1B.

1D is a perspective view illustrating a rechargeable battery in a state before the label of FIG. 1A is attached.

2A and 2B are schematic diagrams of a radio frequency identification antenna (RFID ANTENNA) shown in FIG. 1D.

3A is a perspective view of a rechargeable battery according to another exemplary embodiment of the present invention.

3B is a perspective view illustrating a rechargeable battery in a state before the label of FIG. 3A is attached.

4A is a perspective view illustrating a secondary battery according to another embodiment of the present invention.

4B is a perspective view illustrating a rechargeable battery in a state before the label of FIG. 4A is attached.

5 is a flowchart illustrating a method of manufacturing a rechargeable battery according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: bare cell 200: circuit board

210: external input / output terminal 220: test terminal

230: antenna terminals 300, 1300, 2300: resin part

310, 1310, 2310: Top surface of resin portion 311: External input / output terminal exposure hole

312: test terminal exposed hole 313: antenna terminal exposed hole

320, 1320, 2320: side surface of resin part 321: antenna through hole

400: radio frequency identification antenna (RFID ANTENNA)

410, 2410: antenna lead 500, 1500, 2500: label

600, 1600, 2600: secondary battery 1330: stepped portion

2321: coupling hole

Claims (11)

Bare cells; A circuit board including an antenna terminal and electrically connected to the bare cell; A resin part formed to cover the circuit board and having an antenna connection part exposing at least a part of the antenna terminal; And And a antenna lead connected to an antenna terminal exposed to the antenna connection unit, and including a radio frequency identification antenna (RFID ANTENNA) installed on one side of the bare cell. The method of claim 1, And the resin part is formed between the bare cell and the circuit board and on an upper surface of the circuit board. The method of claim 1, The antenna connection part includes an antenna terminal exposure hole formed on an upper surface of the resin part and an antenna through hole formed on a side surface of the resin part. The antenna lead penetrates through the antenna through hole and is coupled to the antenna terminal by welding at the antenna terminal exposure hole. The method of claim 1, The antenna connection portion is formed in the shape of a groove that enters from the top and side of the resin portion inside the top and side of the resin portion, and consists of a stepped portion formed so that the antenna terminal is exposed to the top surface of the resin portion,  The antenna lead is secondary battery, characterized in that coupled to the antenna terminal exposed to the step portion by welding on the upper surface of the resin portion. The method of claim 1, The antenna connection portion is formed on the side of the resin portion made of a coupling hole for exposing the antenna terminal, And the antenna lead is inserted into the coupling hole and coupled to the antenna terminal by welding at the side of the resin part. The method according to any one of claims 3 to 5, The radio frequency identification antenna (RFID ANTENNA) is a secondary battery, characterized in that consisting of a loop antenna. The method of claim 6, And a insulating member interposed between the loop antenna and the bare cell to prevent a short circuit. The method of claim 7, wherein The insulating member is a secondary battery, characterized in that made of insulating tape. The method according to any one of claims 3 to 5, And the bare cell is covered by a label. Coupling a bare circuit to a circuit board having an antenna terminal to form a core pack; Molding the core pack with a resin to form a resin part covering the circuit board, wherein forming an antenna connection part exposing at least a part of the antenna terminal of the circuit board to the resin part; And And installing a radio frequency identification antenna (RFID ANTENNA) having an antenna lead on one side of the bare cell, and connecting the antenna lead to the antenna terminal. The method of claim 10, And installing the radio frequency identification antenna (RFID ANTENNA) on one side of the bare cell and covering the radio frequency identification antenna (RFID ANTENNA) and the bare cell by a label. Method of preparation.

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