KR100936259B1 - Secondary Battery Pack Providing Excellent Productivity and Structural Stability - Google Patents

Abstract

The present invention is a battery cell in which the electrode assembly is embedded in a battery case with an electrolyte; A protection circuit module having a protection circuit for controlling overcharge, overdischarge, and overcurrent of the battery cell; An insulating mounting member having a structure in which a protection circuit module is mounted on the upper portion; An insulating cap coupled to an upper end of the battery cell; The top cap includes a pair of protruding electrode terminals (first protruding electrode terminal and second protruding electrode terminal) respectively connected to the positive electrode and the negative electrode of the electrode assembly. Through holes corresponding to the protruding electrode terminals are formed in the mounting member and the protection circuit module, respectively, and the protruding electrode terminals are inserted into and fixed in the through holes of the insulating mounting member and the protection circuit module. Provided is a secondary battery pack having a structure in which an insulating mounting member and a protection circuit module are coupled to a cell.

Description

Secondary Battery Pack Providing Excellent Productivity and Structural Stability}

The present invention relates to a secondary battery pack having excellent manufacturing processability and structural stability, and more particularly, includes a battery cell, a protective circuit module, an insulating mounting member on which a protective circuit module is mounted, and an insulating cap. The top cap has a pair of protruding electrode terminals connected to the anode and the cathode of the electrode assembly, respectively, and the through hole corresponding to the protruding electrode terminals is formed in the insulating mounting member and the protection circuit module, respectively. The protruding electrode terminals are continuously inserted into and fixed in the insulating mounting member and the through grooves of the protective circuit module, and thus the secondary battery pack having a structure in which the insulating mounting member and the protective circuit module are coupled to the battery cell. will be.

Due to the development of technology and increasing demand for mobile devices, the demand for secondary batteries is also rapidly increasing. Among them, lithium secondary batteries with high energy density, high operating voltage, and excellent storage and life characteristics are not only various mobile devices but also various electronic products. It is widely used as an energy source.

Secondary batteries are classified into roughly cylindrical cells, square cells, and pouch cells according to external and internal structural features. Among them, rectangular batteries and pouch cells having a small width to length are particularly noticeable. I am getting it.

In addition, secondary batteries are attracting attention as energy sources such as electric vehicles and hybrid electric vehicles, which are proposed as a way to solve air pollution of conventional gasoline and diesel vehicles using fossil fuel. Therefore, the type of applications using the secondary battery has been very diversified due to the advantages of the secondary battery, and it is expected that the secondary battery will be applied to many fields and products in the future.

However, the lithium secondary battery contains various combustible materials, and there is a danger of overheating or explosion due to overcharging, overcurrent, other physical external impact, etc., and thus has a serious safety drawback. Therefore, the lithium secondary battery is equipped with a protection circuit module (PCM) capable of effectively controlling abnormal states such as overcharge and the like connected to the battery cells.

PCM is composed of Field Effect Transistor (FET) as a switching element that controls the energization of current, and passive elements such as voltage detector, resistor, and capacitor, and overcharge, over discharge, over current, short circuit of battery cell. Prevents explosion, overheating, leakage or deterioration of charge and discharge characteristics of the battery cells, and suppresses deterioration of electrical performance and physical and chemical abnormalities, eliminating risk factors and extending service life. .

In general, the PCM is electrically connected to the battery cell by a welding or soldering method through a conductive nickel plate. That is, a nickel plate is welded or soldered to the connecting lead of the PCM, respectively, and then the nickel plate is welded or soldered to the electrode terminals of the battery cell to connect the PCM to the battery cell, thereby manufacturing a battery pack.

In this case, a large number of welding or soldering is required in order to configure the battery pack, and such welding, etc., must be performed in a very precise work due to the small structure of the secondary battery, and thus the likelihood of defects is high. Moreover, the addition of these operations during the manufacturing process of the product acts as a factor that increases the product cost.

In addition, the safety devices including the PCM must maintain electrical connection with the electrode terminals and at the same time maintain electrical insulation with other parts of the battery cell. Therefore, in order to configure such a connection form, a plurality of insulating mounting members are required, which has a disadvantage in that the assembly process of the battery cell is complicated. On the other hand, a method of applying and bonding an adhesive between safety elements and the insulating mounting member has been used, but this coupling method has a disadvantage of weakening the strength of the battery cell. Such a weakening of the bond strength, when a physical shock is applied to the battery cell, may cause an electrical short, etc., may cause a safety problem such as fire and explosion.

Therefore, various technologies for facilitating the assembly of the insulating mounting member and the safety device mounted on the top of the battery cell and at the same time improving the mechanical strength of the battery pack have been actively conducted.

In this regard, as an example, Korean Patent Application Publication No. 2006-0060801 discloses an electrode group including a separator and a positive electrode plate and a negative electrode plate disposed on both sides of the separator; A case in which the electrode group is built; A cap assembly coupled to the case to seal the cap and having an external terminal electrically connected to the electrode group; A gasket installed in an outer terminal through hole formed in the cap assembly and fitted between an outer terminal and the through hole; Disclosed is a secondary battery including a fastening member fitted to the external terminal and coupled to the external terminal while being in close contact with the gasket.

However, two external terminals formed in the cap assembly and electrically connected to the electrode group cannot be coupled to each other to secure safety elements such as a protection circuit module mounted on the upper part of the battery cell, thereby improving mechanical strength of the upper part of the battery cell. There is a difficult problem.

In addition, Korean Patent Application Publication No. 2004-0054232 discloses an electrode assembly comprising a positive electrode plate, a negative electrode plate and a separator interposed between the positive electrode plate and the negative electrode plate; A can containing the electrode assembly together with an electrolyte and formed of a conductive metal material and having at least one fixing protrusion on a bottom surface thereof; An electrode coupled to an opening of the can, the cap plate having at least one groove formed on an upper surface of the can, and penetrating through the gasket to be insulated from the cap plate, and connected to any one of the tabs drawn from the positive electrode plate and the negative electrode plate. A cap assembly having a terminal; And a lead plate coupled to the cap plate by being inserted into the groove of the cap plate to be rolled and connected to the safety device.

However, by being rolled on the cap plate, the bonded lead plate serves to firmly secure the safety device on the top of the battery cell, thereby slightly improving the mechanical strength of the battery pack, but still welding or welding the electrode terminal of the battery cell. Soldering has not solved the problem of complicating a battery pack assembly process such as PCM.

Therefore, the need for a technology that can simplify the assembly process by reducing the number of members mounted on the top of the battery cell, and can secure a stable bonding strength while connecting the protective circuit module and the insulating mounting member in a non-welding manner. This is high.

The present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

After extensive research and various experiments, the inventors of the present application develop a secondary battery pack combining a top cap of a battery cell, a protection circuit module and an insulating cap mounted at an upper end thereof by a specific type of fastening structure. It has been found that the secondary battery pack of this structure can greatly simplify the assembly process and provide excellent structural stability by improved bonding strength.

Accordingly, an object of the present invention is to provide a secondary battery pack in which a battery cell, a protection circuit module on the top of the battery cell, and an insulating mounting member are coupled through a specific fastening structure.

Secondary battery pack according to the present invention for achieving this object,

A battery cell in which an electrode assembly is embedded in a battery case together with an electrolyte, and an open upper end of the battery case is sealed by a top cap;

A protection circuit module having a protection circuit for controlling overcharge, overdischarge, and overcurrent of the battery cell;

An insulating mounting member having a structure in which a protection circuit module is mounted on the upper portion and mounted to a top cap of a battery cell; And

An insulating cap coupled to an upper end of the battery cell while surrounding the insulating mounting member in a state in which the protection circuit module is mounted;

It contains,

The top cap is provided with a pair of protruding electrode terminals (first protruding electrode terminal and second protruding electrode terminal) connected to the anode and the cathode of the electrode assembly, respectively, and the insulating mounting member and the protection circuit. The through grooves corresponding to the protruding electrode terminals are formed in the module, respectively, and the protruding electrode terminals are inserted into and fixed in the through grooves of the insulating mounting member and the protection circuit module, thereby insulating the battery cell. It consists of a structure in which the member and the protection circuit module are combined.

That is, the secondary battery pack according to the present invention is configured to include a battery cell, a protective circuit module, an insulating mounting member and an insulating cap, the combination of the insulating mounting member and the protective circuit module for the battery cell is the pair of protrusions Since the type electrode terminals are continuously inserted into and fixed in the through holes of the insulating mounting member and the protection circuit module, the assembly process can be performed by a simple coupling method as a whole.

In addition, the secondary battery pack according to the present invention, since the structure of the insulating mounting member and the protective circuit module is formed to facilitate the mutual mechanical fastening, compared with the conventional secondary battery pack structure that requires a plurality of welding or soldering, etc. It simplifies the manufacturing process and provides a very stable coupling structure against external shocks and vibrations.

The battery case may be a metal can, and preferably an aluminum can, because it requires easy processing and a certain level of mechanical strength.

The protruding electrode terminal may be fixed after being inserted into the insulating mounting member and the through groove of the protective circuit module, and the method may be various. It is not limited.

In one preferred example, the protruding electrode terminal may be formed of a conductive rivet (rivet) structure. In this case, the end of the protruding electrode terminal of the rivet structure may be fixed to the protective circuit module by rolling it in a state in which the end of the protruding electrode terminal protrudes a predetermined length on the upper surface of the protective circuit module. Specifically, a pair of conductive rivets are formed in the top cap in a structure connected to the positive electrode and the negative electrode of the electrode assembly, respectively, and are continuously inserted into the through holes of the insulating mounting member and the protective circuit module, and the protective circuit module. By a series of simple processes of rolling the end of the electrode terminal protruded from the top surface of the combination of the insulating mounting member and the protective circuit module to the battery cell and the electrical connection of the protective circuit module and the electrode terminal can be achieved at the same time. Rolling of the protruding electrode terminal ends further improves the bonding force between the insulating mounting member and the protection circuit module to the battery cell.

As another example, after the protruding electrode terminal is inserted into the insulating mounting member and the through groove of the protective circuit module, its end protrudes to a predetermined length on the upper surface of the protective circuit module, and the end is mechanically fastened. It may be a structure fixed to the protection circuit module in a manner. Since the mechanical fastening method of the protective circuit module to the protruding electrode terminal end may vary, in one preferred example, there is a fastening method by the female screw structure and the male screw structure.

On the other hand, the protruding electrode terminals may serve to additionally facilitate the manufacture of the battery cell and simplify the structure, in addition to the role of fixing the protective circuit module and the insulating mounting member to the top of the battery cell. It may be made of a structure.

For example, at least one of the protruding electrode terminals may have a hollow structure including a through passage communicating with an inside of the battery case. The through passage may be used as an electrolyte injection hole for injecting an electrolyte after mounting an electrode assembly in a battery case during a battery cell manufacturing process. That is, since the protruding electrode terminal itself is utilized as the electrolyte injection hole, it is not necessary to form a separate electrolyte injection hole on the top cap as in the conventional battery cell. Therefore, the through passage may be used as an electrolyte injection hole, for example, and may have a structure sealed by a metal ball.

The shape of the protruding electrode terminal may vary. For example, as described above, in the structure in which the end of the electrode terminal is rolled and fixed to the protection circuit module, the protruding electrode terminal is formed in a structure in which grooves of the shape indented from the top are formed for easy rolling. May be

In addition, in the structure in which the end of the protruding electrode terminal is fixed to the protective circuit module by mechanical fastening, for example, an end of the protruding electrode terminal is formed with a screw line, and the end protrudes to the upper surface of the protective circuit module. It may be made of a structure to form a mechanical fastening by coupling the nut in the state.

The protruding electrode terminals may be variously applied regardless of the type and shape of the battery cell. For example, in the case of a square battery cell, the first protruding electrode terminal may be electrically connected to the top cap. The second protruding electrode terminal may be connected to the positive electrode, and may be connected to the negative electrode of the battery cell in an electrically insulated state from the top cap. Accordingly, the first protruding electrode terminal may serve as a positive electrode terminal, and the second protruding electrode terminal may serve as a negative electrode terminal.

In the above structure, preferably, the first protruding electrode terminal may be formed integrally with the top cap. That is, the first protruding electrode terminal may be formed at the same time as the top cap in the process of press molding the top cap. However, of course, the separately prepared protruding terminal may be formed by coupling to the top cap, and for example, a separate protruding terminal may be coupled to the top cap by welding. However, in consideration of manufacturing processability, a method of forming the protruding electrode terminal by press molding of the former is more preferable.

In another example, the top cap is formed with a through hole; The first protruding electrode terminal and the second protruding electrode terminal are inserted into a plate-shaped main body, an upper extension vertically extending upwardly of the main body, and a through hole of the top cap and vertically extending downwardly of the main body. A lower extension; In the state where the lower extension of the protruding electrode terminal is inserted into the through-hole of the top cap, the end of the protruding electrode terminal may be rolled to couple the protruding electrode terminal to the top cap.

By the coupling structure of the top cap and the protruding electrode terminals as described above, the electrode terminals can be more easily and stably coupled to the top cap, and the upper and lower extensions of the protruding electrode terminals are a protection circuit for the battery cell. The combination of the module and the insulating mounting member can be more firmly and stably maintained.

Meanwhile, in the structure in which the second protruding electrode terminal is electrically negative, for example, the interface between the second protruding terminal and the through hole of the top cap may be insulated from the top cap of the anode. It may have a structure in which an electrically insulating gasket for mutual insulation is mounted.

The upper extension portion and / or the lower extension portion may be formed in an easy rolled structure. For example, the upper extension portion and / or the lower extension portion may have a structure in which a groove of a shape indented from an end thereof is formed for easy rolling.

The protruding electrode terminals are not particularly limited as long as they can be easily inserted into the through holes of the protective circuit module and the insulating mounting member. For example, the protruding electrode terminals may be formed in a planar circle, an ellipse or a rectangle.

Further, the material of the protruding electrode terminal is not particularly limited as long as it is a material having high conductivity as the electrode terminal. Preferably, Cu, Ni, and / or Cr plated steel, stainless steel, aluminum, Al alloy, Ni alloy, Cu alloy or Cr alloy. If the protruding electrode terminal is formed integrally with the top cap, it is of course made of the same material as the top cap.

Meanwhile, the insulating mounting member may be coupled to the battery cell by an adhesive method using an adhesive, so that the insulating mounting member may be stably mounted on the top cap.

The insulative cap serves to protect the battery cell from external shocks and to maintain mechanical insulation while supplementing the mechanical strength of the members mounted on the top of the battery cell. Preferably, the insulating cap extends downwardly to a predetermined length so that at least a portion thereof may surround the outer surface of the upper end of the battery cell while being mounted on the battery cell so as to improve the bonding force to the battery cell. It may be a structure. In order to maximize this effect, the downward extension of the insulating cap is preferably a structure that is coupled to the outer surface of the upper end of the battery cell by an adhesive method or a mechanical fastening method.

In addition to the insulating cap coupled to the upper end of the battery cell may be a structure that is equipped with a separate insulating cap (lower cap) in the lower end, it may be a structure in which the outer film is attached to the outer surface of the case of the battery cell. This protects the battery cell from external shock and maintains electrical insulation. Preferably, the exterior film may be attached to the structure surrounding the downward extension of the insulated cap.

The secondary battery pack according to the present invention may be variously applied regardless of the type and shape of the battery cell, and preferably, a so-called rectangular battery in which an electrode assembly of a cathode / separator / cathode is embedded in a rectangular metal can. .

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, but the scope of the present invention is not limited thereto.

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

Referring to FIG. 1, the secondary battery pack 100 according to the present invention includes a battery cell 130 in which an electrode assembly is embedded in a battery case together with an electrolyte, and a top cap 120 that seals an open upper end of the battery case. Insulating mounting in a state where the protective circuit module 150 of the plate-shaped protective circuit module 150, the insulating mounting member 140 mounted on the top cap 120 of the battery cell 130, the protective circuit module 150 is mounted The insulating cap 160 is coupled to the upper end of the battery cell 130 while surrounding the member 140, and the lower cap 170 is mounted on the lower end of the battery cell 130.

The pair of protruding terminals 112 and 114 includes a first protruding electrode terminal 112 and a second protruding electrode terminal 114 protruding upward in both directions of the upper end of the top cap 120. . The insulating mounting member 140 has through grooves 142 and 144 formed in shapes and sizes corresponding to lower ends of the protruding electrode terminals 112 and 114, and the protruding electrodes in the protection circuit module 150. Through grooves 152 and 154 having a shape and size corresponding to the upper ends of the terminals 112 and 114 are formed.

The first protruding terminal 112 is connected to the positive electrode (not shown) of the battery cell 130 in an electrically connected state with the top cap 120, and the second protruding terminal 114 is the top cap 120. It is connected to the negative electrode (not shown) of the battery cell 130 in an electrically insulated state.

The combination of the insulating mounting member 140 and the protection circuit module 150 with respect to the battery cell 130 includes the through grooves in which the protruding electrode terminals 112 and 114 are formed at both sides of the insulating mounting member 140. This is achieved by inserting the through holes 152 and 154 formed on both sides of the field 142 and 144 and the protection circuit module 150, and then rolling the ends of the protruding electrode terminals 112 and 114. . In addition, bonding of the insulating mounting member 140 to the top cap 120 may be accomplished by an adhesive.

The insulating cap 160 is coupled to the upper end of the battery cell 130 while wrapping the insulating mounting member 140 in the state in which the protective circuit module 150 is mounted, so as to surround the outer surface of the upper end of the battery cell 130. It extends downward to a predetermined length. The lower cap 170 is attached to the lower end of the battery cell 150.

2 to 6 are cross-sectional schematics of various modifications of the first protruding electrode terminal.

Referring to these drawings together with FIG. 1, first, the protruding electrode terminal 112 of FIG. 2 is a conductive rivet and includes a plate head 1122 and a body 1124 extending perpendicular to the head 1122.

In the protruding electrode terminal 112a of FIG. 3, the hollow portion 1126 formed at the center portion may not only facilitate rolling but also communicate with the inside of the battery cell 130, and thus may be used as an electrolyte injection hole.

The protruding electrode terminal 112b of FIG. 4 has an indentation groove 1128 indented at a predetermined depth h from the upper end of the body 1124 at the central portion thereof, so that the end of the body 1124 is rolled. It can be made to extend well in the outward direction of the body 1124.

In addition, the protruding electrode terminal 112c of FIG. 5 has a threaded line 1125 formed at an end of the body 1124, and the through holes 142 and 144 of the insulating mounting member 140 and the protection circuit module 150 are formed. After successive insertions into 152, 154, the thread 1125 at the end is mechanically engaged with a nut (not shown).

In the protruding electrode terminal 112d of FIG. 6, the lower end portion of the head 1122 is integrally formed with the top cap 120, thereby reducing the number of parts when manufacturing the battery pack 100, and further reducing the head 1122. A through passage 1121 is formed at the central portion of the body 1124 and may be used as an electrolyte injection hole. The protruding electrode terminal 112d integrated with the top cap 120 may be formed at the same time as the top cap 120 is press-molded, for example.

7 is a schematic cross-sectional view of the second protruding electrode terminal.

Referring to FIG. 7, the second protruding electrode terminal 114 includes a plate-shaped main body 1142, an upper extension 1144 vertically extending upward of the main body 1142, and a through hole of the top cap (FIG. 8). A lower extension part 1146 inserted into the lower part of the main body 1142 and extending vertically to the lower part of the main body 1142.

In addition, recessed grooves 1143 and 1145 are formed at each end of the upper extension portion 1144 and the lower extension portion 1146, thereby facilitating the rolling of the edge portion.

8 is a vertical cross-sectional view showing an upper portion of the secondary battery pack.

Referring to FIG. 8 together with FIG. 1, an insulating mounting member 140 and a protection circuit module 150 are formed on the top cap 120 formed integrally with the first protruding electrode terminal 112 on the secondary battery pack 100. ) Are mounted sequentially.

As described above, the first protruding electrode terminal 112 is formed with a through passage 1121 for injecting an electrolyte into the central portion, and is integrally formed with the top cap 120.

On the other hand, the second protruding electrode terminal 114 has its lower extension 1146 inserted and mounted from the top into the through-hole 122 of the top cap 120, and the second protruding electrode terminal 114 is provided. At the interface of the top cap 120 and the electrically insulating gasket 124 is mounted for mutual insulation. In addition, indentations 1143 and 1145 are formed at the ends of the upper extension 1144 and the lower extension 1146 of the second protruding electrode terminal 114, respectively.

As described above, the secondary battery pack according to the present invention combines the insulating mounting member and the protection circuit module on the top of the battery pack by using the protruding electrode terminals of a specific structure, thereby greatly simplifying the assembly process, and excellent bonding force. By this, the structural stability of the battery pack can be improved. In addition, since the protruding electrode terminals are not exposed to the outside of the battery, it is possible to enhance the reliability of the product and prevent the risk of short circuit.

Those skilled in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

1 is an exploded perspective view of a secondary battery pack according to an embodiment of the present invention;

2 to 6 are vertical cross-sectional schematics of various modifications of the first protruding electrode terminal;

7 is a schematic cross-sectional view of the second protruding electrode terminal;

8 is a schematic vertical cross-sectional view showing an upper portion of a secondary battery pack.

Claims (18)

A battery cell in which an electrode assembly is embedded in a battery case together with an electrolyte, and an open upper end of the battery case is sealed by a top cap; A protection circuit module having a protection circuit for controlling overcharge, overdischarge, and overcurrent of the battery cell; An insulating mounting member having a structure in which a protection circuit module is mounted on the upper portion and mounted to a top cap of a battery cell; And An insulating cap coupled to an upper end of the battery cell while surrounding the insulating mounting member in a state in which the protection circuit module is mounted; It contains, The top cap is provided with a pair of protruding electrode terminals (a first protruding electrode terminal and a second protruding electrode terminal) connected to the anode and the cathode of the electrode assembly, respectively, and the first protruding electrode terminal. Is connected to the positive electrode of the battery cell in an electrically connected state with the top cap, and the second protruding electrode terminal is connected to the negative electrode of the battery cell in an electrically insulated state from the top cap, and the insulating mounting member and the protection circuit The through grooves corresponding to the protruding electrode terminals are formed in the module, respectively, and the protruding electrode terminals are inserted into and fixed in the through grooves of the insulating mounting member and the protection circuit module, thereby insulating the battery cell. Secondary battery pack, characterized in that the combination of the member and the protective circuit module. The secondary battery pack according to claim 1, wherein the battery case is a metal can. The secondary battery pack as claimed in claim 1, wherein the protruding electrode terminal has a conductive rivet structure. The secondary battery pack according to claim 1, wherein an end of the protruding electrode terminal is rolled in a state protruding to a predetermined length on an upper surface of the protective circuit module and fixed to the protective circuit module. The secondary battery pack of claim 1, wherein an end of the protruding electrode terminal protrudes a predetermined length on an upper surface of the protection circuit module, and the end is fixed to the protection circuit module by a mechanical fastening method. . The secondary battery pack according to claim 4 or 5, wherein at least one of the protruding electrode terminals has a hollow structure including a through passage communicating with an inside of the battery case. The secondary battery pack according to claim 6, wherein the through passage is sealed by a metal ball after being used as an electrolyte injection hole. The secondary battery pack according to claim 4, wherein the protruding electrode terminal has a groove formed in an indented shape from an upper end for easy rolling. The secondary battery pack according to claim 5, wherein a screw line is formed at an end of the protruding electrode terminal, and the nut is coupled to the nut in a state in which the end protrudes toward the upper surface of the protective circuit module. delete The secondary battery pack according to claim 1, wherein the lower end of the first protruding electrode terminal is integrally formed with the top cap. The method of claim 1, The top cap is formed with a through hole, The first protruding electrode terminal and the second protruding electrode terminal are inserted into a plate-shaped main body, an upper extension vertically extending upwardly of the main body, and a through hole of the top cap and vertically extending downwardly of the main body. Consists of a lower extension, Rolling the end of the lower extension portion of the secondary battery pack, characterized in that for coupling the protruding electrode terminal to the top cap. 13. The secondary battery pack according to claim 12, wherein an electrically insulating gasket is installed at an interface between the second protruding electrode terminal and the through hole of the top cap. 13. The secondary battery pack as claimed in claim 12, wherein at least one of the upper extension portion and the lower extension portion is provided with a groove indented from its end portion for easy rolling. The secondary battery pack of claim 1, wherein the protruding electrode terminals have a circular, elliptical, or quadrangular shape. The secondary battery pack as claimed in claim 1, wherein the protruding electrode terminals are made of steel, stainless steel, aluminum, Al alloy, Ni alloy, Cu alloy, or Cr plated with one or more of Cu, Ni, and Cr. . The secondary battery pack of claim 1, wherein the insulating mounting member is coupled to the battery cell by an adhesive method. The secondary battery pack as claimed in claim 1, wherein the battery cell is a rectangular lithium secondary battery.

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