KR20120124026A - Rechargeable battery - Google Patents

Abstract

PURPOSE: A secondary battery is provided to prevent damages to current collecting elements and to provide productivity by providing an insulating element which can combine components thereof in one body. CONSTITUTION: A secondary battery(100) comprises an electrode assembly accepted in the case, a terminal part(30) installed in at least a part of the inside the case; at least one current collector comprising a terminal linking part(52) and electrically connecting the electrode assembly and the terminal part; and at least one insulating element(60) installed inside the case. The insulating element comprises a current collecting element linking part(61), which is combined with the terminal linking part and suppors at least a part of the terminal linking part.

Description

Secondary Battery {RECHARGEABLE BATTERY}

The present invention relates to a secondary battery, and more particularly, to a secondary battery having an improved structure of an insulating member.

A rechargeable battery is a battery that can be charged and discharged unlike a primary battery that is not rechargeable. Low-capacity secondary batteries are used in portable electronic devices such as mobile phones, notebook computers, and camcorders, and large-capacity batteries are used as motor driving power sources or large-capacity power storage devices for hybrid vehicles.

Recently, a high output secondary battery using a high energy density nonaqueous electrolyte has been developed, and the high output secondary battery includes a plurality of secondary batteries in series so as to be used for driving a motor such as an electric vehicle requiring a large power. It consists of a large capacity battery module. The secondary battery may be formed in a cylindrical shape and a square shape.

However, the secondary battery is made of a combination of a number of components that requires a lot of labor to combine these components, a problem that the productivity may be lowered in the manufacturing process.

In addition, the secondary battery may have a problem in that a current collector member that electrically connects the electrode terminal and the electrode assembly is damaged during repeated external shocks, charges, and discharges.

In addition, the gas generated therein due to the operation of the secondary battery is laminated on a portion, there may be a problem that the gas pressure inside the secondary battery is not maintained uniformly.

Therefore, the present invention has been made to solve the problems described above, the object of the present invention is to provide an insulation member that can be combined integrally to improve the productivity of the secondary battery, and to prevent damage to the current collector member It is to provide a secondary battery that can be.

Another object of the present invention is to provide a lower insulating member having a structure capable of maintaining a uniform gas pressure inside a secondary battery.

According to an embodiment of the present invention, a secondary battery includes a case, an electrode assembly accommodated in the case, at least one terminal portion installed in at least a portion of the inside of the case, at least one electrode electrically connecting the electrode assembly and the terminal portion and including a terminal coupling portion. One current collector and at least one insulating member installed inside the case, the insulating member includes a current collector member coupling portion coupled to the terminal coupling portion and supporting at least a portion of the terminal coupling portion.

In addition, the insulating member may include a body portion formed at a portion adjacent to the current collector member coupling portion.

In addition, the body portion may include a groove in which the terminal coupling portion is accommodated.

In addition, the terminal portion may be coupled to the terminal coupling portion of the current collector member in the groove.

In addition, the current collecting member coupling portion may include an opening positioned between the groove and the outer edge of the insulating member, and the terminal coupling portion may be inserted into and extend from the opening.

In addition, the edge of the groove may have a certain shape, and the terminal portion may have a circumference corresponding to a certain shape of the edge of the groove and may include a flange inserted into and coupled to the groove.

In addition, the terminal coupling portion may include a terminal coupling hole coupled with the coupling protrusion extending from the terminal portion.

In addition, the current collector member coupling portion may be coupled to a plate forming the bottom surface of the current collector member coupling portion of the insulating member.

In addition, the current collecting member coupling portion and the plate may be coupled by forcing the projections and holes corresponding to each other on the current collecting member coupling portion and the plate.

Further, the terminal coupling portion may include a fuse portion having a smaller cross-sectional area than other portions of the terminal coupling portion, and the fuse portion may be supported by the current collector member coupling portion of the insulating member.

In addition, the fuse unit may include a fuse hole.

In addition, the insulating member may include one or more gas outlets.

In addition, the gas discharge portion may include a first gas discharge passage located between the side and the end of the insulating member.

In addition, the first gas discharge passage may include a gas discharge passage formed along the side of the insulating member and a gas discharge hole formed at an end of the insulating member.

In addition, the gas discharge portion may include a pair of first gas discharge passages formed between a pair of opposite sides of the insulating member and end portions of the insulating member.

In addition, the gas discharge portion may include a second gas discharge passage formed on the upper surface of the insulating member, and the second gas discharge passage may include one or more gas discharge grooves crossing the upper surface of the insulating member.

In addition, the at least one terminal portion may include first and second terminal portions, the at least one current collecting member may include first and second current collecting members, and the at least one insulating member may include the first and second insulating members. It may include.

According to another embodiment of the present invention, a current collector terminal assembly includes a current collector member including a electrode coupling portion and a terminal coupling portion, a current collector member coupling portion and a current collector coupling portion coupled to a terminal member and a terminal coupling portion and supporting at least a portion of the terminal coupling portion. It may include an insulating member including a body portion having a groove that is accommodated, the terminal coupling portion is inserted into the opening of the current collector member coupling portion of the insulating member can be received and coupled to the groove, the terminal member is fixed to the groove and the terminal coupling Can be combined with wealth.

Further, the terminal coupling portion may include a fuse portion having a smaller cross-sectional area than other portions of the terminal coupling portion and supported by the entire member coupling portion of the insulating member.

In addition, the insulating member includes at least one first gas discharge passage formed between the side and the end of the insulating member and at least one gas discharge groove formed on the upper surface of the insulating member and across the upper surface of the insulating member. It may include a second gas discharge passage.

According to one embodiment of the present invention, it is possible to improve the productivity of the secondary battery by simplifying the work process, it is possible to provide an insulating member to which the current collector member is coupled so that the current collector member is not easily damaged by an external impact.

1 is a perspective view illustrating a secondary battery according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.
3 is a partially exploded perspective view of a rechargeable battery according to a first exemplary embodiment of the present invention.
4 is a partial cross-sectional view in the combined state of FIG. 3.
5 is a partially exploded perspective view according to another modification of the first embodiment of the present invention.
6 is a partially exploded perspective view of a rechargeable battery according to a second exemplary embodiment of the present invention.
7 is a partial cross-sectional view in the combined state of FIG. 6.
8 is a partially exploded perspective view of a rechargeable battery according to a third exemplary embodiment of the present invention.
9 is a partially exploded perspective view of a rechargeable battery according to a third exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the dimensions of layers or regions may be exaggerated for clarity of explanation. It is to be understood that one layer or element is "on top" of another layer or substrate or is directly over or intervening another layer in between. And, it is to be understood that one layer is "on top" of another layer directly underneath, or through one or more other layers in between. Furthermore, it is to be understood that one layer is "under" two layers, where one layer is the only layer between the two layers, or one or more other layers are interposed therebetween. In the specification and drawings, the same reference numerals denote the same elements.

1 is a perspective view illustrating a rechargeable battery according to a first exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

Referring to FIGS. 1 and 2, the secondary battery 100 according to the first embodiment of the present invention is inserted through a separator 13 between the first electrode 11 and the second electrode 12. A plurality of electrode assemblies 10 formed, a case 26 in which the electrode assemblies 10 are embedded, the first terminal portion 30 and the second terminal portion 40 and the case 26 electrically connected to the electrode assembly 10. And first and second lower insulating members 60 and 80 installed in the cap plate 20 and the case 26 coupled to the opening formed in the casing 20.

The secondary battery 100 according to the present embodiment will be described as an example of a square as a lithium ion secondary battery. However, the present invention is not limited thereto, and the present invention may be applied to a battery such as a lithium polymer battery. In addition, the first electrode 11 may be a cathode and the second electrode 12 may be an anode. In contrast, the first electrode 11 may be an anode, and the second electrode 12 may be a cathode. . However, in the present invention, for convenience of description, the first electrode 11 and the second electrode 12 will be described instead of the cathode and the anode.

The electrode assembly 10 may be formed in a jellyroll form by winding the first electrode 11, the second electrode 12, and the separator 13 together. The first electrode 11 and the second electrode 12 may each include a current collector made of a thin metal foil and an active material coated on the surface of each current collector. In addition, the first electrode 11 and the second electrode 12 may include a coating portion in which an active material is coated on the current collector, a first electrode non-coating portion 11a and a second electrode non-coating portion in which the active material is not coated on the current collector ( 12a). The coating part forms most of the first electrode 11 and the second electrode 12 in the electrode assembly 10, and the first electrode and the second electrode uncoated parts 11a and 12a are formed on both sides of the coating part in a jelly roll state. Each can be arranged.

However, the present invention is not limited thereto, and the electrode assembly 10 includes a first electrode 11 and a second electrode 12 formed of a plurality of sheets, stacked with the separator 13 interposed therebetween. It may be made of a structure.

The first terminal portion 30 is electrically connected to the first electrode uncoated portion 11a of the electrode assembly 10 via the first current collecting member 50, and the second electrode uncoated portion 12a is electrically connected to the second electrode uncoated portion 12a. The terminal portion 40 may be electrically connected to the second current collecting member 70. Accordingly, the first terminal portion 30 may include a first electrode terminal, and the second terminal portion 40 may include a second electrode terminal.

The case 26 may be formed in a substantially rectangular parallelepiped shape, and an opening is formed at one surface thereof. However, the present invention is not limited thereto, and the case may be formed in various forms such as a cylindrical shape and a pouch type.

The cap plate 20 may be formed of a thin plate and may be coupled to the opening of the case 26 to seal the opening. In addition, the cap plate 20 may be formed with an electrolyte injection hole 21 for injecting electrolyte into the sealed case 26, and the electrolyte injection hole 21 is sealed by a sealing stopper 22 after the electrolyte injection. Can be. In addition, the cap plate 20 may be provided with a vent hole 23 in which the vent plate 24 is broken when the internal pressure of the sealed case 26 is greater than or equal to a set pressure.

The first and second terminal portions 30 and 40 may be formed of the first and second rivets 31 and 41, the first and second terminal plates 32 and 42, and the first and second terminal plates 32 and 42. The cap plate 20 may include first and second terminal insulating members 33 and 43 and first and second gaskets 34 and 44 installed between the cap plate 20. Here, the first and second rivets 31 and 41 may include the first and second pillar portions 31a and 41a, the first and second flange portions 31b and 41b, and the first and second coupling protrusions 31c, 41c).

In addition, the first and second current collecting members 50 and 70 may include first and second electrode coupling parts 51 and 71 coupled to the first and second electrodes 11 and 12, and first and second terminal parts ( The first and second terminal coupling parts 52 and 72 including the first and second terminal coupling grooves 53 and 73 coupled to the 30 and 40 may be included.

In addition, the first and second lower insulating members 60 and 80 may be installed adjacent to the cap plate 20 in the case 26.

Here, the structures of the first and second terminal portions 30 and 40, the structures of the first and second current collecting members 50 and 70 and the first and second lower insulating members 60 and 80 according to the present embodiment are Since the same, the description of the second terminal portion 40, the second current collector member 70 and the second lower insulating member 80 will be omitted.

However, the first terminal unit 30 according to the present embodiment may include a terminal (not shown) formed in a cylindrical shape instead of a plate type terminal.

3 is a partially exploded perspective view of a rechargeable battery according to a first exemplary embodiment of the present invention, and FIG. 4 is a partial cross-sectional view of the secondary battery in the combined state of FIG. 3.

3 and 4, the first rivet 31, the first current collecting member 50, and the first insulating member 60 of the secondary battery 100 according to the present embodiment will be described in detail.

The first insulating member 60 according to the present embodiment is adjacent to the fixing protrusions 62 and 64 and the current collecting member coupler 61 fixed to the first current collecting member coupler 61 and the cap plate 20. It includes a body portion located. In addition, the body portion includes a fixing groove 63 to which the first rivet 31 is fixed. Here, the first current collecting member coupling portion 61 is formed on one surface of the first insulating member 60 facing the electrode assembly 10 with an opening 61a formed at one side thereof.

In addition, the first current collecting member 50 includes a first electrode coupling portion 51 and a first terminal coupling portion 52 coupled to the first electrode 11.

Therefore, as shown in FIG. 4, the first terminal coupling portion 52 of the first current collecting member 50 is inserted into the first current collecting member coupling portion 61 through the opening 61a, and thus, the first insulating member. It can be fixed to 60.

In addition, the current collector member coupling part 61 may support and fix at least a portion of the terminal coupling part 52 of the current collector member 50.

Here, the width of the opening 61a of the first current collecting member coupler 61 is preferably equal to or larger than the width of the first current collecting member 50.

In addition, the first flange portion 31b formed to extend from the first pillar portion 31a of the first rivet 31 is inserted into the fixing groove 63 formed in the first insulation member 60 so that the first insulation member ( 60).

In this case, the first coupling protrusion 31c formed below the first flange 31b may be inserted into and fixed to the first terminal coupling groove 53 of the first terminal coupling portion 52. Here, the first coupling protrusion 31c and the first terminal coupling groove 53 may be joined by welding. However, the first coupling protrusion 31c may be coupled to the first terminal coupling groove 53 by interference fit.

In addition, the first pillar portion 31a is riveted to the first terminal plate 32. Here, the first terminal insulating member 33 is installed between the first terminal plate 32 and the cap plate 20 to insulate the first terminal portion 30 and the cap plate 20.

As a result, the first terminal coupling portion 52 of the first current collecting member 50 is inserted into and fixed to the first current collecting member coupling portion 61 of the first insulating member 60, and to the first terminal coupling portion 52. The first rivet 31 may be fixedly coupled.

Therefore, according to the present embodiment, the first rivet 31 is compared with the assembly of the secondary battery 100 with the first rivet 31, the first current collecting member 50, and the first insulating member 60 separated. Since the secondary battery 100 may be assembled in a state in which the 31, the first current collecting member 50, and the first insulating member 60 are combined into one, the entire manufacturing process of the secondary battery 100 may be simplified to simplify the secondary battery 100. It is possible to improve the productivity of 100.

In addition, since the first terminal coupling portion 52 of the first current collecting member 50 is fixed by the first insulating member 60, the shock from the outside of the secondary battery 100 may be affected by the first insulating member 60. Is absorbed primarily, thereby preventing damage to the first current collecting member 50.

5 is a partially exploded perspective view according to another modification of the first embodiment of the present invention.

Referring to FIG. 5, the secondary battery 101 according to the present embodiment has the same structure as the secondary battery 100 according to the first embodiment except for the first insulating member 610. The description is omitted.

Referring to FIG. 5, the first insulating member 610 will be described in more detail. The first insulating member 610 according to the present exemplary embodiment may be disposed on one surface of the first insulating member 610 facing the electrode assembly 10. The first current collector member 611 to be formed may include a fixing groove 613 to which the first rivet 31 is fixed and fixing protrusions (not shown).

In addition, the first collector member coupling part 611 has an opening 611a formed at one side thereof, and a plate 611b having a plurality of protrusions 611c separated from the first collector member coupling part 611. ) May be included. Here, the separator 611b may form a bottom surface of the current collector member coupling portion.

In addition, a plurality of holes 611d may be formed in the first current collecting member coupling part 611 in which a plurality of protrusions 611c formed in the plate 611b can be pressed. Therefore, according to the present embodiment, the first current collecting member coupling part 611 may have a structure in which the plate 611b can be separated. Therefore, it is possible to couple the plate 611b after inserting the first current collecting member 50 into the first current collecting member coupling portion 611.

As a result, according to the present embodiment, not only the productivity of the secondary battery 101 and the protection of the first current collecting member 50 from external shocks, but also the first current collecting member 50 is connected to the first current collecting member 611. It is possible to combine easily.

6 is a partially exploded perspective view of a rechargeable battery according to a second exemplary embodiment of the present invention, and FIG. 7 is a partial cross-sectional view of the secondary battery in the combined state of FIG. 6.

Referring to FIGS. 6 and 7, the secondary battery 102 according to the present exemplary embodiment may include the secondary battery according to the first exemplary embodiment except for the first current collecting member 510 and the first insulating member 620. Since the structure is the same as 100), the description of the same structure is omitted.

Referring to FIGS. 6 and 7, the secondary battery 102 according to the present embodiment will be described in more detail. The first current collecting member 510 may include the first electrode coupling part 511 and the first terminal coupling part 512. It may include.

The first terminal coupling part 512 may include a first terminal coupling groove 513 coupled to the first coupling protrusion 31c of the first rivet 31 and a fuse part 514 including a fuse hole. .

In addition, the first insulating member 620 according to the present embodiment has an opening 621 a and is formed on one surface of the first insulating member 620 facing the electrode assembly 10. ), The first rivet 31 may include a fixing groove 623 and fixing protrusions 622 and 624.

As illustrated in FIG. 7, the first terminal coupling part 512 of the first current collecting member 510 is connected to the first current collecting member coupling part 621 through the opening 621a of the first current collecting member coupling part 621. It may be inserted into and fixed to the first insulating member 620.

Here, since the portion in which the fuse portion 514 is formed includes the fusel hole, the cross-sectional area is smaller than that of the other portions of the first terminal coupling portion 512. Therefore, when an overcurrent flows inside the secondary battery, more current flows than other portions and may melt. Therefore, the electrical connection between the electrode assembly and the first terminal portion 30 may be interrupted.

However, since the cross section of the fuse part 514 having the fuse hole is smaller than that of the other parts of the first terminal coupling part 512, stress concentration may be concentrated in the fuse part 514 due to an impact from the outside of the secondary battery 102. There is a possibility that the fuse portion 514 is damaged.

Accordingly, as in the present embodiment, the first terminal coupling part 512 including the fuse part 514 having the fusel hole is coupled to the first current collecting member coupling part 621 of the first insulating member 620. When supporting the first terminal coupling part 512, it is possible to prevent the fuse part 514 from being damaged by an impact from the outside of the secondary battery 102.

In addition, since the fuse part 514 is supported by the first current collecting member coupling part 621, the size of the fuse hole of the fuse part 514 may not be limited to a range that is not damaged by an external impact. Therefore, the freedom of design of the fuse part 514 can be increased.

8 and 9 are partial exploded perspective views of a rechargeable battery according to a third exemplary embodiment of the present invention.

Referring to FIG. 8, the secondary battery 103 according to the present embodiment has the same structure as the secondary battery 102 according to the second embodiment except for the first insulating member 630. The description is omitted.

Referring to FIG. 8, the first insulating member 630 will be described in more detail. The first insulating member 630 according to the present embodiment has an opening (not shown) formed at one side thereof and is opposed to the electrode assembly 10. The first collector member coupling part 631 formed on one surface of the first insulating member 630, the fixing groove (not shown), the fixing protrusions (not shown) and the gas discharge part to which the first rivet 31 is fixed. 635 may include.

Here, the gas discharge part 635 is a first lower insulating member facing the first gas discharge passage 635a and the cap plate 20 which extends from one side of the first insulating member 630 to one end. It may include a second gas discharge passage (635b) formed on one surface of the 630.

In more detail, the first gas discharge passage 635a may include a gas discharge passage 635a1 and a gas outlet 635a2. Here, the gas discharge path 635a1 may be formed starting from one end of the first current collecting member coupling part 631 and extending to one end of the first insulating member 630. For example, the gas discharge path 635a1 may extend along the side surface of the insulating member 630. In addition, the gas discharge port 635a2 may be formed at a position opposite to the gas discharge path 635a1 at one end of the first insulating member 630 and may be connected to the gas discharge path 635a1. In this case, a pair of first gas discharge passages 635a according to the present exemplary embodiment may be formed on both side surfaces of the first insulating member 630.

In addition, the second gas discharge passage 635b may include a gas discharge groove 635b1 formed on one surface of the first insulating member 630 facing the cap plate 20. Here, the gas discharge groove 635b1 may be formed starting from one end of the first insulating member 630 and extending to the other end. Therefore, when the first insulating member 630 is coupled to the cap plate 20, a gap may occur between the first insulating member 630 and the cap plate 20 by the gas discharge groove 635b1. In this case, the second gas discharge passage 635b according to the present embodiment may include a pair of gas discharge grooves positioned opposite to each other.

As a result, a space in which the gas generated in the secondary battery 103 may move may be formed by the first and second gas discharge passages 635a and 635b according to the present exemplary embodiment.

Referring to FIG. 2 again, the role of the gas discharge part 635 according to the present embodiment will be described in more detail. The gas generated between the case 26 and the first insulating member 630 may include the first insulating member 630. The first and second gas discharge passages 635a and 635b may be induced to flow to a portion where the vent hole 23 is located.

Therefore, the gas generated between the case 26 and the first insulating member 630 is blocked by the first insulating member 630 and stacked between the case 26 and the first insulating member 630 to form a first insulating member ( It is possible to prevent the formation of turbulence that can occur in a collision with 630. As a result, the gas discharge part 635 according to the present exemplary embodiment may play a role of maintaining substantially uniform pressure inside the secondary battery 103 by the gas.

In addition, when an overcurrent flows in the fuse part 514 having a smaller cross-sectional area than other portions of the first terminal coupling part 512, the fuse part 514 may be melted to generate gas in the first insulating member 630. Here, the gas generated together with the melting of the fuse unit 514 may be discharged to the outside of the first insulating member 630 through the gas outlet 635a2 through the gas discharge passage 635a1 of the first gas discharge passage 635a. Can be.

Therefore, even if the fuse part 514 is melted, gas can be prevented from being accumulated in the first insulating member 630, thereby preventing the performance of the fuse part 514 from being prevented.

However, the present invention is not limited thereto, and only one first gas discharge passage 635a and one second gas discharge passage 635b may be formed in the first insulating member 630.

In addition, the gas discharge unit 635 according to the present embodiment is not limited to the first and second gas discharge passages 635a and 635b as long as the gas generated in the secondary battery 103 can be discharged. . For example, the gas discharge part 635 may be formed on one surface of the first insulating member 630 facing the electrode assembly 10.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

100, 101, 102, 103: secondary battery 10: electrode assembly
11: first electrode 12: second electrode
13: Separator 30: First terminal portion
31: first rivet 32: first terminal plate
33: first terminal insulating member 40: first terminal portion
50: first electrode dust collecting member 51: first electrode coupling portion
52: first terminal coupling portion 60, 610, 620, 630: first insulating member
61, 611, 621, and 631: first current collecting member coupling portion
70: second current collecting member 80: second insulating member

Claims (20)

case;
An electrode assembly accommodated in the case;
At least one terminal unit installed in at least a portion of the inside of the case;
At least one current collector electrically connecting the electrode assembly and the terminal portion and including a terminal coupling portion; And
At least one insulating member installed inside the case,
The insulating member includes a current collector member coupling portion coupled to the terminal coupling portion and supporting at least a portion of the terminal coupling portion. The method according to claim 1,
The insulating member includes a body portion formed in a portion adjacent to the current collector member coupling portion. The method of claim 2,
The body part includes a secondary cell accommodating the terminal coupling portion. The method of claim 3,
The terminal unit is coupled to the terminal coupling portion of the current collector member in the groove. The method of claim 3,
The current collector member coupling part includes an opening located between the groove and the outer edge of the insulating member, and the terminal coupling part is inserted into and extended to the opening. The method of claim 3,
The edge of the groove has a certain shape,
The terminal unit has a circumference corresponding to a predetermined shape of the edge of the groove and the secondary battery including a flange which is inserted into and coupled to the groove. The method according to claim 1,
The terminal coupling part includes a terminal coupling hole coupled to a coupling protrusion extending from the terminal part. The method of claim 3,
The current collector member coupling part is coupled to a plate forming a bottom surface of the current collector member coupling part of the insulating member. The method of claim 8,
The current collector member coupling portion and the plate are secondary batteries coupled to each other by protrusions and holes corresponding to each other on the current collector member coupling portion and the plate. The method according to claim 1,
The terminal coupling part includes a fuse part having a smaller cross-sectional area than other portions of the terminal coupling part,
The fuse part is supported by the current collector member coupling portion of the insulating member. The method of claim 10,
The fuse part includes a fuse hole. The method of claim 2,
The insulating member includes at least one gas discharge part. The method of claim 12,
The gas discharge part comprises a first gas discharge passage located between the side and the end of the insulating member. The method of claim 13,
The first gas discharge passage includes a gas discharge passage formed along a side surface of the insulating member and a gas discharge port formed at an end of the insulating member. The method of claim 12,
The gas discharge part includes a pair of first gas discharge passages formed between a pair of opposite sides of the insulating member and end portions of the insulating member. The method of claim 12,
The gas discharge portion includes a second gas discharge passage formed on the upper surface of the insulating member,
And the second gas discharge passage includes one or more gas discharge grooves crossing the upper surface of the insulating member. The method according to claim 1,
The at least one terminal portion includes first and second terminal portions,
The at least one current collector member includes first and second current collector members,
The at least one insulating member includes a first and second insulating members. A current collecting member including an electrode coupling portion and a terminal coupling portion;
Terminal member; And
And an insulating member including a current collecting member coupling part coupled to the terminal coupling part and supporting at least a portion of the terminal coupling part, and a body part having a groove accommodating the current collecting member coupling part.
The terminal coupling portion is inserted into and received in the opening of the current collector member coupling portion of the insulating member, and coupled to the groove.
The terminal member is fixed to the groove current collector terminal assembly coupled to the terminal coupling portion. 19. The method of claim 18,
And the terminal coupling part includes a fuse part having a smaller cross-sectional area than other portions of the terminal coupling part and supported by the current collector member coupling part of the insulating member. 19. The method of claim 18,
The insulating member is formed on at least one first gas discharge passage formed between a side surface and an end of the insulating member and at least one gas discharge groove formed on an upper surface of the insulating member and across the upper surface of the insulating member. Collector terminal assembly comprising a second gas discharge passage comprising a.

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