KR100585380B1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
KR100585380B1
KR100585380B1 KR1020050124803A KR20050124803A KR100585380B1 KR 100585380 B1 KR100585380 B1 KR 100585380B1 KR 1020050124803 A KR1020050124803 A KR 1020050124803A KR 20050124803 A KR20050124803 A KR 20050124803A KR 100585380 B1 KR100585380 B1 KR 100585380B1
Authority
KR
South Korea
Prior art keywords
circuit module
battery cell
battery pack
protection circuit
terminal plate
Prior art date
Application number
KR1020050124803A
Other languages
Korean (ko)
Inventor
김성진
김영훈
김희영
박창범
서민용
우길택
임달수
임종필
최찬혁
Original Assignee
주식회사 이랜텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 이랜텍 filed Critical 주식회사 이랜텍
Priority to KR1020050124803A priority Critical patent/KR100585380B1/en
Application granted granted Critical
Publication of KR100585380B1 publication Critical patent/KR100585380B1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/34Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current
    • H01M2/348Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current in response to temperature
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0202Cases, jackets or wrappings for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1022Cabinets, cases, fixing devices, adapters, racks or battery packs for miniature batteries or batteries for portable equipment
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/34Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00Safety devices for primary or secondary batteries
    • H01M2200/10Temperature sensitive devices
    • H01M2200/106PTC
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/30Batteries in portable systems, e.g. mobile phone, laptop
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

The present invention relates to a rechargeable battery pack for use in a portable communication terminal (eg, cellular phone, PCS phone, PDA, DMB phone, etc.).
The present invention constitutes an inner type battery pack in which parts are assembled by assembly, thereby minimizing the volume of the battery pack, and enabling ease of manufacture while reducing the number of parts to cope with the quantity of mass production. In addition, only the protection circuit module is insert-molded in the upper cap in which the molding is made, while the protection circuit module, the battery cell, and the PTC are spot welded in a separate process so that a failure of the molding may occur without replacement of the entire part. It provides a battery pack that is easy and easy to maintain and replace after service, such as to solve the problem of defects by only replacing the unit.
Inner battery pack, protection circuit module, battery cell, PTC, terminal board, connection board

Description

Battery pack {Battery pack}

1 is an exploded view showing the structure of an inner battery pack according to an embodiment of the present invention.

Figure 2 is a perspective view showing a structure of the inner battery pack as an embodiment of the present invention.

Figure 3 is a cross-sectional view showing the structure of the inner battery pack in one embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10; Battery cell 11; Negative terminal

12; Anode terminal 20; Upper cap

30; Protective circuit module 41; Negative terminal block

42; Anode terminal plates 42a and 42b; 1st and 2nd terminal board

50; Lower cap 51; 1st tape

60; Label sheet 70; PTC

71; 2nd tape

The present invention relates to a rechargeable battery pack for use in a portable communication terminal (for example, a cellular phone, a PCS phone, a PDA, a DMB phone, etc.), and more particularly, a protective circuit module that can minimize the volume and is easy to manufacture. The present invention relates to an inner type battery pack having an excellent protection effect.

As is well known, an inner battery pack used as a power source of a portable communication terminal is configured as a structure in which a battery cell and a protection circuit module (PCM) are combined.

The battery cell has a form in which an electrode laminated unit consisting of a positive electrode sheet and a negative electrode sheet is accommodated in a metal casing, and an anode terminal and a cathode terminal are provided on an outer surface of the casing.

The protection circuit module is mounted to the outside of the battery cell to prevent the risk of explosion and overcharge of the battery.

That is, the battery pack has a structure in which a battery cell and a protection circuit module are coupled to each other and packaged in a unit form, and such a battery pack has become smaller, thinner, and lighter according to the trend of miniaturization and light weight of a portable communication terminal using the same. It is required.

Japanese Laid-Open Patent Publication No. 2002-334686 (hereinafter referred to as prior art) discloses an example of such a battery pack, and the battery pack in the prior art includes a battery cell and a protection circuit mounted on the side of the battery cell. The module has an electrode terminal for electrically connecting the battery cell and the protection circuit module.

At this time, the protective circuit module and the electrode terminal is to be fixed integrally with the battery cell by a mold molding portion.

However, the battery pack of the prior art is a method of fixing the protection circuit module and the electrode terminal to the battery cell through the mold molding through the injection of the resin material, there is a considerable difficulty in the manufacture of the battery pack, and The same manufacturing method has the disadvantage of weakening the strength of the mold molding part as cracks or pinholes are generated in the mold molding part when a flow defect of the molten resin is generated in the process of molding the mold molding part. As the mold molding part was easily broken, the protection against the protection circuit module was inevitably had a disadvantage.

In addition, the prior art is a structure in which the protective circuit module and the electrode terminal are integrated into the mold molding part, and even if a defect occurs in any one of the protective circuit module and the electrode terminal, Maintenance and replacement A / S was not efficient as there was no choice but to replace it.

Accordingly, in order to solve the problems of the prior art, a battery pack having a protective circuit case in which a protective circuit module and a positive and negative terminal plates are inserted into upper and lower spaces is provided, while providing a case for covering a circumferential surface of the battery cell. It became.

However, in the above case, due to the use of a separate case to cover the circumferential surface of the battery cell, the overall weight and size of the battery pack are inevitably increased, and as a protective circuit case, the protective circuit module and the positive and negative terminal plates are provided. When the insert process was performed, the insert defects were many, and it was difficult to cope with the mass production of the battery pack.

Accordingly, the present invention has been made to solve the above conventional problems, to configure the battery pack to which the parts are assembled by assembling to minimize the volume, as well as to reduce the number of parts to facilitate the manufacture It is possible to cope with the volume of mass production, and also to solve the problem of defects by replacing only the parts without replacing the whole parts in case of failure of the moldings due to the insert molding of the protection circuit module. The purpose is to provide a battery pack for easy and convenient after-sales service.

Battery pack of the present invention for achieving the above object,

A battery cell that supplies charged power and has a negative terminal and a positive terminal;

An upper cap coupled to an upper portion of the battery cell;

A protective circuit module insert molded into the upper cap;

A negative electrode and a positive terminal plate electrically connecting the negative and positive terminals of the battery cell and the protection circuit module;

A lower cap coupled to a lower portion of the battery cell through a first tape; And,

A label sheet adhesively bonded to a circumferential surface of the battery cell to which the upper cap and the lower cap are coupled; Characterized in that comprises a configuration.

According to another aspect, the negative terminal of the battery cell is connected to the PTC (Positive Temperature Coeffcient) for heating control to protect the protection circuit module, and the PTC is electrically connected to the protection circuit module through the negative terminal plate It is done.

According to another aspect, the negative terminal plate and the PTC is characterized in that the adhesive fixed to the upper surface of the battery cell via a second tape.

According to another aspect of the present invention, the positive electrode terminal plate includes a first terminal plate spot-welded to a protection circuit module, and a second terminal plate spot-welded to a positive electrode terminal provided on an upper surface of the battery cell. Characterized in that the electrical connection is made by welding.

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

1 is an exploded view showing the structure of an inner battery pack as an embodiment of the present invention, Figure 2 is a combined perspective view showing the structure of an inner battery pack as an embodiment of the present invention, Figure 3 is an embodiment of the present invention As an embodiment shows a coupling cross-sectional view showing the structure of the inner battery pack.

1 to 3, an inner battery pack of an embodiment of the present invention includes a battery cell 10, an upper cap 20, a protection circuit module 30, a negative terminal plate 41, and a positive terminal plate ( 42), the lower cap 50, the label sheet 60, and the PTC (70).

The battery cell 10 has an electrode lamination unit comprising a cathode sheet and an anode sheet housed in a metal casing, and is electrically connected to the protection circuit module 30 through the cathode and anode terminal plates 41 and 42. The charging is performed, and the negative electrode terminal 11 and the positive electrode terminal 12 are provided on the upper surface for charging the power.

The upper cap 20 is a molded article that is injection-molded with a resin material that is electrically insulated so as to prevent electrical shorts without using a separate insulating sheet or the like, and a protective circuit module 30 therein. The insert is molded and coupled to the top of the battery cell 10.

The protection circuit module 30 is a circuit board for protecting the battery cell 10 from the risk of explosion and overcharge. The protection circuit module 30 is insert molded during molding of the upper cap 20, and the cathode and anode terminal boards 41 and 42. It is configured to maintain an electrical connection with the battery cell 10 through).

The negative electrode terminal plate 41 and the positive electrode terminal plate 42 are nickel plates having a predetermined elasticity, and the negative electrode terminal plate 41 is the PTC terminal 70 when the PTC terminal is connected to the negative electrode terminal 11. One end is connected to the 70 by spot welding, the other end is connected to the protection circuit module 30 by spot welding, and is adhesively fixed to the upper surface of the battery cell 10 by the second tape 71.

The positive electrode terminal plate 42 is composed of first and second terminal plates 42a and 42b, the first terminal plate 42a is spot welded to the protection circuit module 30, and the second terminal plate 42b is a battery. Spot welding is performed on the anode terminal 12 provided on the upper surface of the cell, and the first and second terminal plates 42a and 42b are configured to be electrically connected by spot welding.

The lower cap 50 is coupled to the lower portion of the battery cell 10, the coupling fixing is configured to be made by the first tape 51.

The label sheet 60 surrounds the circumferential surface of the battery cell 10 in the state where the upper cap 20 and the lower cap 50 are respectively coupled to the upper and lower parts of the battery cell 10, which is the At the same time to reinforce the binding force of the upper cap 20 and the lower cap 50, it is configured to strengthen the outer binding of the upper cap 20 and the lower cap 50 and the battery cell 10.

The PTC 70 is for heating control to protect the protection circuit module 30, and is positioned on the battery cell 10 and is provided with the protection circuit module through a negative terminal plate 41 having a predetermined elasticity. 30 is electrically connected to the upper portion of the battery cell 10 through the second tape 71 together with the negative terminal plate 41.

Assembly of the battery pack according to an embodiment of the present invention configured as described above will be described with reference to FIGS. 1 to 3.

First, when molding the upper cap 20 made of a resin material, the protective circuit module 30 is insert molded therein.

Thereafter, the second terminal plate 42b of the positive electrode terminal plate 42 is spot welded to the positive electrode terminal 12 of the battery cell 10, while the negative electrode terminal 11 of the battery cell 10 is connected to the PTC 70. After spot welding one end, one end of the negative electrode terminal plate 41 is spot welded to the PTC 70.

In this case, the negative electrode terminal plate 41 and the PTC 70 are adhesively fixed to the upper surface of the battery cell 10 through the second tape 71.

Next, after spot welding the first terminal plate 42a of the positive electrode terminal plate 42 to one end of the protective circuit module 30, the protective cell module 30 is inserted into the upper cap 20, the battery cell (10) on the top.

When the first terminal plate 42a is spot welded to the second terminal plate 42b, and the negative terminal plate 41 is spot welded to the protection circuit module 30, the first terminal plate 42a is protected at the top of the battery cell 10. Assembly of the circuit module 30 is completed.

Meanwhile, the lower cap 50 is adhesively fixed to the lower portion of the battery cell 10 by using the first tape 51.

Next, the circumferential surface of the battery cell 10 is wrapped with a label sheet 60 so that the upper cap 20 and the lower cap 50 are not separated from the battery cell 10 by the label sheet 60. do.

Then, the protection circuit module 30 and the battery cell 10 are electrically connected to each other by the negative electrode terminal plate 41 and the positive electrode terminal plate 42, and the protective circuit module 30 is connected to the negative electrode terminal plate 41. The miniaturized and thinner inner battery pack assembly in which electrical connection with the PTC 70 is made is completed.

As described above, the present invention enables the manufacture of mass production by enabling the ease of manufacturing while minimizing the volume of the battery pack and reducing the number of parts through the inner battery pack configuration in which the parts are joined by assembly. It is possible to obtain an effect capable of dealing with quantities.

In addition, the present invention insert molding only the protection circuit module in the upper cap is molded, while the protection circuit module, the battery cell and the PTC is spot welded in a separate process so that when a failure occurs for the molding molded part without replacement of the whole part Maintenance and replacement A / S can be easily and easily achieved, such as to solve the problem of defects only by replacing the.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are within the scope of the claims.

Claims (4)

  1. The protective circuit module is electrically connected to one end of the negative electrode and the positive electrode terminal plate by spot welding on the upper part of the battery cell provided with the negative electrode and the positive electrode terminal to supply the charged power, the protective circuit module is covered by the upper cap, In the conventional battery pack, the label sheet is adhesively bonded to the circumferential surface of the battery cell while the lower cap is coupled to the lower part of the battery cell by the first tape,
    The positive electrode terminal plate comprises a first terminal plate spot-welded to the protection circuit module and a second terminal plate spot-welded to the positive electrode terminal provided on the upper surface of the battery cell, wherein the first and second terminal plates are electrically connected by spot welding. To make this happen,
    The upper part of the battery cell is coupled to the upper cap the insert molded the protection circuit module,
    Spot welding of both ends of the PTC for heating control to protect the protection circuit module is electrically connected to the negative terminal of the battery cell and the negative terminal plate of the protection circuit module.
    The negative electrode plate and the PTC is a battery pack, characterized in that adhesive fixing to the upper surface of the battery cell via a second tape.
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KR1020050124803A 2005-12-16 2005-12-16 Battery pack KR100585380B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020050124803A KR100585380B1 (en) 2005-12-16 2005-12-16 Battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020050124803A KR100585380B1 (en) 2005-12-16 2005-12-16 Battery pack

Publications (1)

Publication Number Publication Date
KR100585380B1 true KR100585380B1 (en) 2006-05-30

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ID=37182147

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020050124803A KR100585380B1 (en) 2005-12-16 2005-12-16 Battery pack

Country Status (1)

Country Link
KR (1) KR100585380B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100791551B1 (en) 2007-08-17 2008-01-07 주식회사 퓨처라인 Protection circuit module and battery including the protection circuit module and method for manufacturing battery
US9252416B2 (en) 2012-12-27 2016-02-02 Hyundai Motor Company Safety apparatus of battery module for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100791551B1 (en) 2007-08-17 2008-01-07 주식회사 퓨처라인 Protection circuit module and battery including the protection circuit module and method for manufacturing battery
US9252416B2 (en) 2012-12-27 2016-02-02 Hyundai Motor Company Safety apparatus of battery module for vehicle

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