KR20060118798A - Secondary battery module - Google Patents

Abstract

Provided is a secondary battery module, wherein electrode terminals are easily linked with each other, the total weight of the battery module is reduced because a flexible conductor is formed of an electric wire, and contact resistance between an electrode terminal and a connecting terminal is reduced. The secondary battery module comprises: many unit cells(10) that include an electrode group having a positive electrode and a negative electrode, and electrode terminals(21,22) to be electrically connected to the electrode group; and a connecting member(20) that includes connecting terminals(25) to be male-female coupled with the electrode terminals(21,22), and a flexible conductor(26) for electrically connecting the connecting terminals(25) to each other.

Description

Secondary Battery Module {SECONDARY BATTERY MODULE}

1 is a perspective view illustrating a rechargeable battery module according to a first embodiment of the present invention.

2 is a side cross-sectional view illustrating a rechargeable battery according to a first exemplary embodiment of the present invention.

3 is a perspective view illustrating a connection terminal according to a second embodiment of the present invention.

4 is a perspective view illustrating a rechargeable battery module according to a third embodiment of the present invention.

5 is a perspective view illustrating a rechargeable battery module according to a fourth embodiment of the present invention.

6 is a perspective view illustrating a rechargeable battery module according to a fifth embodiment of the present invention.

7 is a perspective view illustrating a rechargeable battery module according to a sixth embodiment of the present invention.

8 is a perspective view illustrating a rechargeable battery module according to a seventh embodiment of the present invention.

9 is an exploded perspective view illustrating an electrode terminal and a connection terminal according to a seventh embodiment of the present invention.

10 is a cross-sectional view illustrating a state in which an electrode terminal and a connection terminal are coupled according to a seventh embodiment of the present invention.

The present invention relates to a secondary battery module, and more particularly, to a secondary battery module having improved structure by improving the structure of an electrode terminal and a connection member electrically connecting the same.

A secondary battery is a battery that can be charged and discharged unlike a primary battery that is not rechargeable.

A low-capacity battery in which one battery cell is packed in a pack form is used in portable electronic devices such as a mobile phone, a notebook computer, or a camcorder. In the case of a high-capacity battery in a battery pack unit in which dozens of battery cells are connected, a hybrid electric vehicle, etc. It is widely used as a power source for driving motors.

The secondary battery is manufactured in various shapes, and typical shapes include cylindrical and rectangular shapes, and an electrode group (or jelly-roll) wound around a vortex through a separator, which is an insulator between a positive electrode and a negative electrode. And a cap assembly in which an external terminal is formed in the case, to form a battery.

Recently, a high output secondary battery using a high energy density nonaqueous electrolyte has been developed, and a large capacity secondary battery can be constructed by connecting a plurality of high output secondary batteries in series so as to be used in devices requiring large power, such as an electric vehicle. do.

As described above, one secondary battery (hereinafter, referred to as a unit cell for convenience of description throughout) may form a high output secondary battery (hereinafter, referred to as a battery module for convenience of description throughout) in which a plurality are connected in series or in parallel. Each of the unit cells may include an electrode group having a positive electrode and a negative electrode positioned with a separator interposed therebetween, a case having a space in which the electrode group is embedded, and a cap plate coupled to the case to seal the cap plate; A gasket which protrudes outside the cap plate and is electrically connected to the positive and negative current collectors of the electrode group, and is provided between the cap plate and the positive and negative terminals to ensure the resistance thereto. Include.

In order to form a battery module by connecting each unit cell in series, the unit cells cross each unit so that the positive terminal and the negative terminal projecting outside the cap assembly of each unit cell are crossed with the positive terminal and the negative terminal of the neighboring unit cell. The connecting plate is arranged between the screwed cathode terminal and the anode terminal via a nut.

That is, each electrode terminal is made of a male screw, and the nut is first fastened to each electrode terminal to fix the electrode terminal on the cap assembly, and the positive terminal of one unit cell and the negative terminal of the next unit cell are electrically mounted on the nut. The connecting plate to be connected is inserted and the nut is fastened again on the connecting plate to fix the connecting plate.

However, the conventional structure takes a long time to install the connecting plate, there is a problem that the process is complicated.

In addition, the connection plate has a problem in that the contact area with the electrode terminal is small and the contact resistance is large because it is indirectly connected through the nut.

In addition, the connection plate is formed to have a constant length, the distance between the electrode terminals installed in the neighboring unit cells should be constant at all times, if the error is large, there is a problem that the contact resistance is large or impossible to assemble, and the spacing between the electrode terminals is different The battery module has a problem that cannot be installed.

Therefore, the present invention is to solve the above problems, an object of the present invention to facilitate the fastening of the unit battery and the connection member, the secondary battery module including a connection member that can be easily installed in unit cells of different sizes In providing.

In order to achieve the above object, the battery module of the present invention includes a plurality of unit cells including an electrode group including an anode and a cathode and an electrode terminal electrically connected to the electrode group, and a connection terminal coupled with a male and female electrode terminal. And a connection member including a flexible conductor electrically connecting the connection terminals.

Here, the unit cell includes an electrode group having a positive electrode and a negative electrode disposed therebetween, a case having a space in which the electrode group is embedded, a cap plate coupled to the case to seal the current collector, and the positive and negative electrode current collectors. It includes an anode terminal and a cathode terminal electrically connected and protruding outwardly of the cap plate.

In addition, the battery module may have a structure in which unit cells are connected in series or in parallel so that the positive electrode terminal and the negative electrode terminal are alternately arranged between neighboring unit cells.

The positive electrode terminal and the negative electrode terminal may be coupled to the connection member in a structure that is inserted and wrapped in the connection member.

In addition, the electrode terminal may include a positive electrode terminal and a negative electrode terminal consisting of one or more protrusions, and the connection member may include a connection terminal having a number of grooves corresponding to the number of the protrusions so that the protrusions can be inserted. . Here, the electrode terminal according to the present invention is defined as including both the positive terminal and the negative terminal.

Therefore, the protruding portion of the electrode terminal is inserted into the groove of the connecting terminal, so that the electrode terminal and the connecting terminal are electrically connected.

The connection terminal preferably includes a socket surrounding the outer surface of the electrode terminal and a housing in which the socket is embedded. Therefore, the socket made of metal forms an inner side surface of the groove, and the electrode terminal and the socket contact each other so that the connection terminal is electrically connected to the electrode terminal.

In addition, the flexible conductor may be formed to be sufficiently longer than a distance between neighboring electrode terminals to connect unit cells having various structures. Since the conductor can be bent even if the flexible conductor is formed longer than the interval between the electrode terminals, the flexible conductor can be stably installed on the electrode terminal.

And the flexible conductor may be installed on the side of the connection terminal, may be installed on the upper surface of the connection terminal. In addition, the flexible conductor is preferably an electric wire.

In addition, a support member is installed around the electrode terminal, and the connection terminal may be coupled to the electrode terminal by being fitted to the support member. In other words, the connection terminal is coupled to the support member while being coupled to the structure in which the electrode terminal is inserted into the groove.

The electrode terminal may include an accommodating part that protrudes outward to form an outer shape, an electrode contact plate installed on the storage part and electrically connected to the electrode group, and a supporting member supporting the electrode contact plate. In addition, the connection terminal may include a housing in which the accommodating part is inserted, a connection contact plate installed in the housing to be in close contact with the electrode contact plate, and a pressure plate for pressing the connection contact plate with the electrode contact plate. have.

And it is preferable that the connection contact plate includes a bent portion protruding and the bent portion is electrically connected to the electrode contact plate.

When the fixing of the electrode terminal and the connecting terminal is described, the connecting contact plate is inserted into the receiving part of the electrode terminal while being inserted into the housing of the connecting terminal and the electrode contact plate is in close contact with the electrode contact plate. .

In addition, the connection terminal is inserted into the electrode terminal according to the present invention is a structure that is male and female coupling may be electrically connected to the connecting terminal and the electrode terminal, in this case the electrode terminal comprises a hole formed on the upper surface and the connection terminal It may be made of a structure that is inserted into the hole. In this case, the hole is preferably installed on the inner surface of the socket surrounding the connection terminal. Also preferably, the socket may be made of a metal having excellent electrical conductivity.

The connection terminal may include a protrusion protruding downward, and the protrusion may be inserted into the hole and coupled to the electrode terminal. Here, the protrusion is made of a metal and has a structure in which the protrusion and the flexible conductor are electrically connected. In addition, the holes may be formed in plural, and the protrusions may be formed in a number corresponding to the number of holes.

In addition, the connection terminal may be provided with a support member on the edge so that the electrode terminal can be fitted. The electrode terminal is fitted to the support member so that the electrode terminal and the connection terminal can be more stably coupled.

An electrode contact plate may be installed in the hole of the electrode terminal, and a connection contact plate may be installed in the connection terminal to be in close contact with and electrically connected to the electrode contact plate. The electrode terminal may include an accommodating part forming an outer shape, an electrode contact plate installed in the accommodating part, and a support member supporting the electrode contact plate. In addition, the connection terminal may include a housing inserted into the accommodating part, a connection contact plate installed in the housing, and a pressure plate that closely connects the connection contact plate to the electrode contact plate.

The electrode contact plate may include a bent portion formed to protrude, and the bent portion may be electrically connected to the connection contact plate.

Here, the secondary battery module is used as an energy source for driving a motor of the device in a device that operates by using a motor such as a hybrid electric vehicle (HEV), an electric vehicle (EV), a wireless cleaner, an electric bicycle, an electric scooter, and the like. Can be.

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

1 is a perspective view illustrating a rechargeable battery module according to a first exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view of the unit cell cut along the line I-I of FIG. 1.

Referring to FIGS. 1 and 2, a structure of each unit cell 10 constituting a large capacity battery module is described. In the unit cell 10, a cathode 11 and a cathode 12 are interposed between the separator 13. A case 14 having an electrode group 15 positioned therein, a case 14 having a space in which the electrode group 15 is embedded, a cap plate 17 coupled to the case 14 to be sealed, and the positive and negative electrodes And positive and negative terminals 21 and 22 electrically connected to the parts 11a and 12a and protruding outwardly of the cap plate 17.

The case 14 is made of a conductive metal such as aluminum, an aluminum alloy or nickel plated steel, and the shape is made of a cube or other shape having a cube having an internal space in which the electrode group 15 is located.

Hereinafter, the present invention will be described with respect to the rectangular secondary battery, but the present invention is not limited thereto and may be applied to various structures such as a cylindrical battery.

In the present embodiment, each of the unit cells 10 has a structure in which two electrode terminals 21 and 22 protrude out of the cap plate 17 while keeping a gap therebetween.

Each unit cell 10 having the above-described structure is disposed at regular intervals with the electrode terminals 21 and 22 facing upwards to form a large capacity battery module 10, and the cap of one unit cell 10 is disposed. The positive electrode terminal 21 and the negative electrode terminal 22 protruding upward from the plate 17 are alternately arranged to alternate with the positive electrode terminal 21 and the negative electrode terminal 22 of the neighboring unit cell 10.

In addition, a partition wall 24 serving as a flow path of the refrigerant may be installed between the unit cells 10 to cool the battery module.

Accordingly, the positive electrode terminal 21 and the negative electrode terminal 22 are repeated on both sides of the center of the unit cell 10 to form electrode terminals arranged at regular intervals. The crossing electrode terminals can be understood as one line formed in a line.

In the battery module 10 having the above structure, the connecting member for electrically connecting the positive electrode terminal 21 and the negative electrode terminal 22 between neighboring unit cells 10 in order to connect the unit cells 10 in series. 20 is installed.

The connection member 20 includes a connection terminal 25 that is male and female and the electrode terminals 21 and 22 and a flexible conductor 26 that electrically connects the connection terminals 25.

The connecting member 20 has a structure in which two connecting terminals 25 are connected through the flexible conductor 26 to electrically connect neighboring electrode terminals 21 and 22.

The electrode terminals 21 and 22 are wrapped and inserted into the connection member 20, and in particular, the electrode terminals 21 and 22 are inserted into and coupled to the connection terminal 25. In addition, the connection terminal 25 has a housing 252 forming an outer shape and a socket 251 installed inside the housing 252 to form a groove 253 to surround the outer surfaces of the electrode terminals 21 and 22. Include.

In addition, the flexible conductor 26 is formed longer than the interval between the electrode terminals (21, 22), if the connection member 20 is installed on the electrode terminals (21, 22) the flexible conductor ( 26 has a slightly curved structure, and because of this structure, the connection terminal 26 may be used as a tool for connecting various types of battery modules having different intervals between the electrode terminals 21 and 22.

In addition, as illustrated in FIG. 1, the flexible conductor 26 may be formed of an electric wire. In particular, when the flexible conductor 26 is made of a coated wire, the weight is reduced, and there are various advantages such as no short circuit.

3 is a perspective view showing a connection terminal 30 according to a second embodiment of the present invention. Referring to the drawings, the shape of the housing 352 of the connection terminal 35 is not limited, and may be formed in a cylindrical shape as shown in FIG. 1, and a hexahedral shape as shown in FIG. 3. It can also be done. In addition, a portion in which the flexible conductor 36 is installed on the connection terminal 35 may be installed on the top or side surface of the connection terminal 35. When the flexible conductor 36 is installed on the side of the connection terminal 35, space can be saved.

The socket 351 has a shape corresponding to a cross section of the electrode terminal, is installed in the housing 352, and the electrode terminals 21 and 22 are closely fitted to the socket 351. In this embodiment, the electrode terminal is formed in a cylindrical shape and the socket is formed in a shape that is rolled round to surround the outer peripheral surface of the cylinder.

With this structure, the area between the electrode terminals 21 and 22 and the socket 351 increases, and the contact resistance at the contact points decreases.

4 is a perspective view illustrating a rechargeable battery module according to a third embodiment of the present invention. As shown in FIG. 4, the electrode terminals protrude to the outside of the unit cell 10, and the positive electrode terminal 41 and the negative electrode terminal 42 are spaced apart at predetermined intervals. In addition, the electrode terminals 41 and 42 are provided with a connecting member 40 for electrically connecting the neighboring unit cells 10, and the connecting member 40 is male and female and the electrode terminals 41 and 42 are coupled to each other. And a flexible conductor 46 connecting the connecting terminal 45 and the connecting terminals 45.

Here, the electrode terminals 41 and 42 are formed of a plurality of protrusions, and the connection terminal 45 has a number of grooves corresponding to the number of the protrusions, and the protrusions are inserted into the grooves.

In the present embodiment, although the number of the protrusions is 4, the present invention is not limited thereto, and may be various numbers depending on the size and structure of the unit cell 10. In addition, the flexible conductor 46 is installed on the side surface of the connection terminal 40. In addition, the contact area is enlarged than when the electrode terminal is formed of a plurality of protrusions, and thus, the contact resistance is further reduced.

5 is a perspective view illustrating a rechargeable battery module according to a fourth embodiment of the present invention. As shown in FIG. 5, the electrode terminals protrude to the outside of the unit cell 10, and the positive electrode terminal 41 and the negative electrode terminal 42 are spaced apart at predetermined intervals. In addition, the electrode terminals 41 and 42 are provided with a connecting member 40 for electrically connecting neighboring unit cells 10, and the connecting member 40 is male and female and the electrode terminals 41 and 42 are coupled to each other. And a flexible conductor 46 connecting the connection terminal 40 to the connection terminal 40.

Here, the electrode terminals 41 and 42 are formed of a plurality of protrusions, and support members 411 and 421 capable of supporting the connection terminal 46 are formed around the portion where the electrode terminals 41 and 42 are formed. Is installed. Accordingly, the connection terminal 46 is inserted into the support members 411 and 421 to be coupled to the electrode terminals 41 and 42 by inserting the protrusion. In this structure, the connection terminal 45 is fixed by the support members 411 and 421, and the connection terminal 45 is more stably coupled with the electrode terminals 41 and 42.

6 is a perspective view illustrating a rechargeable battery module according to a fifth embodiment of the present invention. As shown in FIG. 6, the electrode terminals 51 and 52 protrude outside the unit cell 10, and the positive electrode terminal 51 and the negative electrode terminal 52 are spaced apart at predetermined intervals. In addition, the electrode terminals 51 and 52 are provided with a connection member 50 for electrically connecting the neighboring unit cells 10, and the connection member 50 is male and female and the electrode terminals 51 and 52 are coupled to the male and female. And a flexible conductor 56 connecting the connecting terminal 55 and the connecting terminals 55.

Here, the electrode terminals 51 and 52 have a hole formed on an upper surface thereof, and the connection terminal 55 is inserted into the hole so that the electrode terminals 51 and 52 and the connection terminal 55 are coupled to each other. In addition, the electrode terminals 51 and 52 have a structure in which a socket 511 surrounding the connection terminal 55 is installed on an inner side surface of the hole, and the socket 511 is electrically connected to the electrode group 15.

In addition, the connection terminal 55 includes a protrusion 551 inserted into the hole and a base 552 supporting the protrusion 551. The protrusion 551 is installed on the base 552 to be electrically connected to the flexible conductor 56. In addition, the protrusion 551 and the socket 511 are fitted to be in close contact with each other to stably contact.

7 is a perspective view illustrating a rechargeable battery module according to a sixth embodiment of the present invention. As shown in FIG. 7, the electrode terminals 71 and 72 protrude to the outside of the unit cell 10, and the positive electrode terminal 71 and the negative electrode terminal 72 are spaced apart at predetermined intervals. In addition, the electrode terminals 71 and 72 are provided with a connection member 70 for electrically connecting the neighboring unit cells 10, and the connection member 70 is connected to the electrode terminal 71 with a male and female connection. And a flexible conductor 76 connecting the terminal 75 and the connection terminals 75.

Here, the electrode terminals 71 and 72 include a plurality of holes formed on an upper surface thereof, and the connection terminal 75 includes a plurality of protrusions 751 inserted into the holes. In addition, the protrusion 751 is formed of a number corresponding to the number of the hole, the hole is provided on the inner surface of the socket 711 surrounding the protrusion 751 is installed, the socket 711 is the protrusion 751 and Close contact and stable contact

In addition, the support member 752 protrudes from the edge of the connection terminal 75 so that the electrode terminals 71 and 72 can be fitted. Therefore, the connection terminal 75 is coupled to the electrode terminal (71, 72) is fitted to the support member 752 while the protrusion 751 is inserted into the hole, the electrode terminal (71, 72) in this structure And the connection terminal 75 is more stably coupled.

8 is a perspective view illustrating a rechargeable battery module according to a seventh embodiment of the present invention, FIG. 9 is an exploded perspective view illustrating an electrode terminal and a connection terminal according to a seventh embodiment of the present invention, and FIG. 7 is a cross-sectional view of the electrode terminal and the connection terminal according to the seventh embodiment in a cut state.

As shown in FIG. 8, the electrode terminals 81 and 82 protrude outside the unit cell 10, and the positive electrode terminal 81 and the negative electrode terminal 82 are spaced apart at predetermined intervals. In addition, the electrode terminals 81 and 82 are provided with a connecting member 80 for electrically connecting neighboring unit cells 10, and the connecting member 80 is male and female and the electrode terminals 81 and 82 are coupled to each other. And a flexible conductor 86 connecting the connection terminal 85 to the connection terminal 85.

In this embodiment, the structure of the positive electrode terminal 81 and the negative electrode terminal 82 is the same, and the adjacent positive electrode terminal 81 and the negative electrode terminal 82 are electrically connected by the connecting member 85. In addition, the structure in which the positive electrode terminal 81 and the positive electrode terminal 82 are coupled to the connection terminal 85 is also the same, and thus, the description of the negative electrode terminal 82 will be replaced with the description of the positive electrode terminal 81.

Here, the electrode terminal 81 according to the present embodiment has an outer shape, and an accommodating part 813 having one side opened, an electrode contact plate 812 inserted into the accommodating part 813, and the electrode contact plate 812. It includes a support plate 811 for supporting. In addition, the connection terminal 85 includes a housing 853 that forms an outer shape, one side of which is open, and is fitted into the receiving portion 813 of the electrode terminal 81, and is inserted into the housing 853, and the electrode contact is installed. A connection contact plate 851 in close contact with the plate 812 and a pressing plate 852 for pressing the connection contact plate 851 toward the electrode contact plate 812 are included.

The support plate 811 is spaced apart from the receiving portion 813 by a predetermined distance, and the housing 853 of the connection terminal 85 can be inserted therebetween.

In addition, the electrode contact plate 812 is made of a metal material having excellent elasticity, and includes a bent portion 812a that protrudes. Accordingly, when the connection contact plate 851 is in close contact with the electrode contact plate 812, the contact portion 812a is in contact with the bent portion 812a. The electrode contact plate 812 and the connection contact plate 851 are deformed so as to be stably in close contact with each other.

In addition, in the present embodiment, the connection terminal 85 is illustrated as being inserted into the electrode terminal 81, but the present invention is not limited thereto, and the electrode terminal 81 is inserted into the connection terminal 85. The structure or the bent portion 812a may be formed in the connection contact plate 851, which will also be seen as belonging to the true spirit of the present invention.

Referring to the process of coupling the connection terminal 85 and the electrode terminal 81 according to the present embodiment, while the housing 853 of the connection terminal is fitted to the receiving portion 813 of the electrode terminal, the housing 853 The electrode contact plate 812 and the support plate 811 provided in the electrode terminal 81 are inserted therein. In addition, as the electrode contact plate 812 and the support plate 811 are inserted, the electrode contact plate 812 is fitted to be in close contact with the connection contact plate 851, and is further pressed by the pressure plate 852. Stable contact.

The secondary battery of the present invention is a device that operates by using a motor such as a hybrid electric vehicle (HEV), an electric vehicle (EV), a wireless cleaner, an electric bicycle, an electric scooter, and the like, and is used as an energy source for driving a motor of the device. Can be used.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Of course it belongs to the range of.

As described above, according to the embodiment of the present invention, since the connecting member includes a connecting terminal and a flexible conductor, and the connecting terminal and the electrode terminal are fitted with a male and female coupling, the electrode terminals can be easily connected.

In addition, there is an advantage that the flexible conductor is installed between the connecting terminals can be easily installed in the battery module having a different distance between the electrode terminals, in particular, the flexible conductor is formed of a wire to reduce the overall weight of the battery module You can.

In addition, the connection terminal is coupled to the structure surrounding the insertion of the electrode terminal, the electrode terminal is composed of a plurality of protrusions or grooves, the contact area is increased, there is an advantage that can reduce the contact resistance between the electrode terminal and the connection terminal have.

Claims (18)

A plurality of unit cells including an electrode group including a positive electrode and a negative electrode and an electrode terminal electrically connected to the electrode group; And A connecting member including a connecting terminal coupled to the electrode terminal and a male and female and a flexible conductor electrically connecting the connecting terminals; Secondary battery module comprising a. The method of claim 1, The electrode terminal is a secondary battery module is wrapped around the connecting terminal inserted. The method according to claim 1 or 2, The electrode terminal is composed of one or more protrusions, the connection member includes a secondary battery module including a connection terminal is formed with one or more grooves to be inserted into the protrusion. The method according to claim 1 or 2, The connection terminal includes a housing forming an outer shape and a socket installed in the housing and the socket to which the electrode terminal is fitted. The method according to claim 1 or 2, The flexible conductor is a secondary battery module is formed longer than the interval between neighboring electrode terminals. The method according to claim 1 or 2, The flexible conductor is a secondary battery module installed on the side of the connection terminal. The method according to claim 1 or 2, The flexible conductor is a secondary battery module which is an electric wire. The method according to claim 1 or 2, A secondary battery module is installed around the electrode terminal and the connection terminal is coupled to the electrode terminal is fitted to the support member. The method of claim 3, The electrode terminal forms an outer shape and includes an accommodating part formed at one side thereof to be protruded and an electrode contact plate installed in the accommodating part, and the connecting terminal is formed in the housing and the housing in which the groove is formed at one side to insert the accommodating part. And a connection contact plate that is in close contact with the electrode contact plate. The method of claim 9, The connection contact plate includes a protruding bent portion, and the bent portion is in contact with the electrode contact plate. The method of claim 1, The electrode terminal includes a hole formed in the upper portion and the connection terminal is a secondary battery module is inserted into the hole. The method of claim 11, The hole is a secondary battery module is installed on the inner surface of the socket surrounding the connection terminal. The method of claim 11, The connection terminal includes a protrusion protruding downward, the secondary battery module is inserted into the hole. The method of claim 11, The connection terminal is a secondary battery module is formed with a support member protruding from the edge and the electrode terminal is fitted to the support member to be coupled to the connection terminal. The method of claim 11, The electrode terminal is a secondary battery module having an electrode contact plate is installed in the hole, the connection terminal is provided with a connection contact plate that is electrically connected to the electrode contact plate. The method of claim 15, The electrode terminal forms an outer shape and has one side open and includes a receiving part having a hole, an electrode contact plate installed in the receiving part, and a support plate supporting the electrode contact plate. The method of claim 15, The secondary battery module includes a secondary battery module including an outer shape, one side of which is open, a housing inserted into the hole of the electrode terminal, a connection contact plate installed in the housing, and a pressure plate for closely contacting the connection contact plate to the electrode contact plate. . The method of claim 15, The electrode contact plate includes a protruding bent portion and the bent portion is a secondary battery module electrically connected to the connection contact plate.

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