WO2017222260A1

WO2017222260A1 - Rechargeable battery

Info

Publication number: WO2017222260A1
Application number: PCT/KR2017/006415
Authority: WO
Inventors: 이현수
Original assignee: 삼성에스디아이 주식회사
Priority date: 2016-06-24
Filing date: 2017-06-19
Publication date: 2017-12-28
Also published as: KR102574484B1; KR20180001064A

Abstract

A rechargeable battery, according to one embodiment of the present invention, comprises: an electrode assembly which charges and discharges a current; a case which accommodates the electrode assembly; a cap plate which is coupled to an opening of the case so as to expose, to the outside, a first electrode terminal and a second electrode terminal connected to the electrode assembly, and which is electrically connected to the second electrode terminal; and an external short-circuit part which has a short-circuit tab and a short-circuit member, the short-circuit tab being electrically connected to the first electrode terminal at the outside of the cap plate, and the short-circuit member being in a short-circuit hole of the cap plate, and which separates the short-circuit member from the short-circuit tab when a preset internal pressure is applied, wherein the external short-circuit part comprises an insulating body and an insulating cover, the insulating body accommodating the short-circuit tab so as to electrically insulate same, thereby blocking moisture penetrating from the outside and discharging internal air, and the insulating cover rotatably coupling to the insulating body by being connected thereto by means of a living hinge so as to block moisture from the outside penetrating between the insulating body and the insulating cover.

Description

Secondary battery

The present invention relates to a secondary battery.

A rechargeable battery is a battery that repeatedly performs charging and discharging, unlike a primary battery. For example, the secondary battery has an electrode assembly for charging and discharging in a case, and coupled to the opening of the case to the cap plate, the negative and positive terminals connected to the electrode assembly are drawn out of the cap plate, and the negative terminal. And the cap plate is formed to allow external shorting at the external shorting section.

The cap plate is also electrically connected to the positive terminal, has a positive nature with the case, and is electrically insulated from the negative terminal. The external short circuit portion is electrically connected to the negative terminal at the outside of the cap plate and remains insulated from the cap plate having the positive electrode property.

The external short circuit may maintain an insulating state according to the internal pressure of the secondary battery, and may be switched to the short circuit state. For example, the external short circuit portion includes a shorting tab connected to the negative electrode terminal, a shorting member provided in the shorting hole of the cap plate opposite to the shorting tab, and an insulating member containing the shorting tab to electrically insulate the cap plate.

In addition, the external short circuit part further includes an insulating cover for inserting and installing a shorting tab connected to the negative electrode terminal to the insulating member and covering the shorting tab by being formed of an electrical insulating material on top of the shorting tab and being coupled to the insulating member.

However, since the external short circuit forms a structure in which the insulating member and the insulating cover are manufactured as individual components to assemble the negative terminal and the cap plate, the manufacturing cost can be increased due to the increase in the number of components.

In addition, the external short circuit portion forms a passage between the shorting tab and the insulating cover by providing a step and a gap between the projection of the shorting tab and the projection of the insulating cover, and lengthens the length of the passage, thereby preventing the infiltration of external moisture. Enable discharge.

However, when the external short circuit portion increases the size of the passage so as to smoothly discharge the air, it is difficult to prevent the ingress of external moisture, and when the performance of preventing the infiltration of the external moisture is enhanced, it is difficult to secure the discharge of the internal air stably.

One aspect of the present invention is to provide a secondary battery that can reduce the number of parts in the external short circuit, and stably secure the discharge of the internal air while preventing the penetration of external moisture.

A secondary battery according to an embodiment of the present invention, an electrode assembly for charging and discharging a current, a case accommodating the electrode assembly, a first electrode terminal and a second electrode coupled to the opening of the case and connected to the electrode assembly A cap plate withdrawing the terminal to the outside and electrically connected to the second electrode terminal, a shorting tab electrically connected to the first electrode terminal at the outside of the cap plate, and a shorting member in the shorting hole of the cap plate. And an external short circuit that short-circuits the short circuit member to the short circuit tab when the pressure resistance is set, wherein the external short circuit part electrically insulates the short circuit tab to block external moisture from entering and discharge air therein. And a living hinge connected to the insulating body to block external moisture from flowing between the insulating body and the insulating body. And an insulating cover to be joined.

The living hinge may be formed in an extension part extending outward from the insulating body to open and close the insulating cover.

The insulating body is disposed in close contact with the outer surface of the cap plate to block the inflow of water from the outside, the first side wall having a first height connected to the living hinge, and the first side wall extending from the first side wall to discharge the air therein. It may include a passage connected to the negative and the discharge hole.

The extension part may further include a protrusion that protrudes toward the cap plate at a height set along an outer side of the discharge hole to extend the discharge hole.

The insulating cover may further include a second side wall having a second height smaller than the first height so as to block external moisture and being coupled to the inner surface of the first side wall of the insulating body by an outer surface.

The insulating body may further include a stepped portion formed along the outer side of the shorting tab in the first side wall to cover the outer side of the shorting tab on the lower side and supporting the second side wall on the upper side.

The shorting tab may include a tab protrusion protruding to a height set in an outward direction corresponding to the shorting hole and having a corresponding hole corresponding to the shorting hole.

The insulating cover may further include a third side wall that protrudes in succession to the outside of the tab protrusion.

The third side wall may include a connection groove connecting the inside and the outside of the third side wall between the tab protrusion and the living hinge to discharge air therein.

An inner surface of the third side wall and an outer surface of the tab protrusion may form a gap therebetween to connect the tab protrusion to the connection groove.

The third side wall may be in close contact with the shorting tab between the tab protrusion and the first electrode terminal to block external moisture from entering.

The insulating cover may include ribs that are formed at a height corresponding to the third side wall in the second side wall to support the shorting tab.

The short tab may include a rivet hole coupled to the rivet terminal of the first electrode terminal on the opposite side of the tab protrusion, and may include fixing holes coupled to a fixing protrusion protruding from the insulating body.

The first side wall of the insulating body and the third side wall of the insulating cover may primarily block the penetration of external moisture, and the tab protrusion of the shorting tab may secondarily block the penetration of external moisture.

According to one embodiment of the present invention, the secondary steel member is installed inside the case of the secondary battery, and it is possible to fix the protruding end of the current collecting tab while reinforcing the strength of the case. Therefore, even when an external force is applied from the outside of the case, the lead tab and the electrode assembly are prevented from being deformed and damaged, thereby improving durability of the secondary battery. It blocks the inflow of water and exhausts the air inside, and connects the insulating cover to the insulating body by a living hinge (living hinge), so that the rotation coupling is effective to block the external water inflow between the insulating body.

In the external short circuit, the insulating body and the insulating cover connected to the living hinge can reduce the number of components constituting the external short circuit, and stably ensure the discharge of the internal air while preventing the penetration of external moisture.

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

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a partial perspective view illustrating in detail the combination of the external short circuit of FIG.

FIG. 4 is a partial perspective view of the outer short circuit of FIG. 3.

FIG. 5 is a partial cross-sectional view taken along the line VV of FIG. 3.

6 is a partial cross-sectional view taken along the line VI-VI of FIG. 4.

7 is a plan view of a state in which an external short circuit portion is coupled.

FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII of FIG. 7.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement 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, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

Throughout the specification, when a part is "connected" to another part, it includes not only "directly connected", but also "indirectly connected" between other members. In addition, when a part is said to "include" a certain component, this means that it may further include other components, except to exclude other components unless otherwise stated.

In addition, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the illustrated.

1 is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1. 1 and 2, a rechargeable battery according to an embodiment includes an electrode assembly 10 for charging and discharging current, a case 15 containing the electrode assembly 10, and a cap coupled to an opening of the case 15. The first electrode terminal 21 (hereinafter referred to as "cathode terminal") and the second electrode terminal 22 (hereinafter referred to as "anode terminal") provided on the plate 20, the cap plate 20, and an external short circuit portion ( 40). The external short circuit portion 40 is provided on the cathode terminal 21 side from the outside of the cap plate 20.

For example, the electrode assembly 10 arranges the first electrode 11 (hereinafter referred to as "cathode") and the second electrode 12 (hereinafter referred to as "anode") on both sides of the separator 13 as an insulator. Then, the stacked negative electrode 11, separator 13 and positive electrode 12 are rolled off in a jellyroll state.

The negative electrode 11 and the positive electrode 12 are coated

portions

11a and 12a each of which coated the active material on the current collectors of the metal thin films Cu and Al, and an uncoated portion formed of the current collector exposed by not applying the active material. 11b, 12b).

The uncoated portion 11b of the negative electrode 11 is formed at one end of the negative electrode 11 along the negative electrode 11 to be wound. The uncoated portion 12b of the anode 12 is formed at one end of the anode 12 along the anode 12 to be wound. The uncoated

portions

11b and 12b are disposed at both ends of the electrode assembly 10, respectively.

For example, the case 15 is formed of a substantially rectangular parallelepiped to set a space for accommodating the electrode assembly 10 and the electrolyte therein, and forms an opening connecting the external and internal spaces on one surface of the rectangular parallelepiped. The opening allows insertion of the electrode assembly 10 into the case 15.

The cap plate 20 is installed in the opening of the case 15 to seal the case 15. For example, the case 15 and the cap plate 20 may be made of aluminum and welded to each other.

In addition, the cap plate 20 includes an electrolyte injection hole 29, a vent hole 24, and terminal holes H1 and H2. The electrolyte injection hole 29 couples the cap plate 20 to the case 15, and then injects the electrolyte into the case 15. After the electrolyte injection, the electrolyte injection opening 29 is sealed with a sealing stopper 27.

The vent hole 24 is closed by a vent plate 25 that can be cut to exhaust the internal pressure and air of the secondary battery. When the internal pressure and air of the secondary battery reach the set pressure, the vent plate 25 is cut and the vent hole 24 is opened. The vent plate 25 has a notch 25a for inducing an incision.

The negative electrode terminal 21 and the positive electrode terminal 22 are electrically connected to the negative and

positive electrodes

11 and 12 of the electrode assembly 10, respectively, and are installed in the terminal holes H1 and H2 of the cap plate 20, respectively. Therefore, the electrode assembly 10 is electrically drawn out of the cap plate 20 and the case 15 through the negative terminal 21 and the positive terminal 22.

The negative terminal 21 and the positive terminal 22 form the same structure with each other inside the cap plate 20, and form different structures with the outside of the cap plate 20. Therefore, the same structures are described together, and the other structures may be described separately, respectively.

The positive and

negative terminals

21 and 22 are

rivet terminals

21a and 22a respectively installed in the terminal holes H1 and H2 of the cap plate 20, and the

rivet terminals

21a and 22a inside the cap plate 20.

Flanges

21b and 22b extending broadly at and the

plate terminals

21c and 22c disposed outside the cap plate 20 and connected by riveting or welding to the

rivet terminals

21a and 22a.

The negative and

positive gaskets

36 and 37 are provided between the

rivet terminals

21a and 22a of the negative and

positive terminal

21 and 22 and the inner surfaces of the terminal holes H1 and H2, respectively. Between the

rivet terminals

21a and 22a of the 22 and the cap plate 20 is sealed and electrically insulated.

Well, the

anode gaskets

36 and 37 are further installed between the

flanges

21b and 22b and the inner surface of the cap plate 20 to further seal and electrically connect between the

flanges

21b and 22b and the cap plate 20. Insulate. That is, the positive and

negative gaskets

36 and 37 prevent leakage of the electrolyte through the terminal holes H1 and H2 even though the negative and

positive terminals

21 and 22 are installed in the cap plate 20. .

The negative lead tabs 71 and 72 electrically connect the negative and

positive terminals

21 and 22 to the

uncoated portions

11b and 12b of the negative and

positive electrodes

11 and 12 in the electrode assembly 10, respectively. That is, the positive and negative lead tabs 71 and 72 are coupled to the lower ends of the

rivet terminals

21a and 22a to caulk the lower ends so that the negative and positive lead tabs 71 and 72 are connected to the

flanges

21b and 22b. While being supported, it is connected to the lower ends of the

rivet terminals

21a and 22a.

The negative and positive insulating

members

61 and 62 are provided between the negative and positive lead tabs 71 and 72 and the cap plate 20, respectively. Insulate electrically. In addition, the negative and positive

electrode insulating members

61 and 62 are coupled to the cap plate 20 on one side, and the negative and positive lead tabs 71 and 72, the

rivet terminals

21a and 22a and the

flanges

21b and 22b on the other side. It wraps around and stabilizes their connection structure.

Meanwhile, the top plate 46 will be described in relation to the rivet terminal 22a and the plate terminal 22c of the positive terminal 22, and the rivet terminal 21a and the plate terminal 21c of the negative terminal 21 will be described. In this regard, the external short circuit section 40 will be described.

The top plate 46 on the positive electrode terminal 22 side is formed of a conductor to electrically connect the plate terminal 22c of the positive electrode terminal 22 and the cap plate 20. For example, the top plate 46 is interposed and electrically insulated between the plate terminal 22c and the cap plate 20 to penetrate the rivet terminal 22a.

Therefore, the top plate 46 and the plate terminal 22c are coupled to the top of the rivet terminal 22a to caulk the top, so that the top plate 46 and the plate terminal 22c are coupled to the top of the rivet terminal 22a. . The plate terminal 22c is installed outside the cap plate 20 with the top plate 46 interposed therebetween.

At this time, the positive electrode gasket 37 is further extended between the rivet terminal 22a and the top plate 46. That is, the anode gasket 37 prevents the rivet terminal 22a and the top plate 46 from being electrically connected directly. That is, the rivet terminal 22a is electrically connected to the top plate 46 and the cap plate 20 through the plate terminal 22c. Therefore, the cap plate 20 has an anode property.

3 is a partial perspective view of the external short circuit of FIG. 1 in detail, and FIG. 4 is a partial perspective view of the external short circuit of FIG. 3. 3 and 4, the external short circuit portion 40 includes a short circuit tab 41 and a short circuit member 43 spaced apart or shorted according to the internal pressure of the secondary battery.

The short tab 41 is electrically connected to the rivet terminal 21a of the negative electrode terminal 21 and is disposed in an insulating structure on the outside of the cap plate 20 to have negative electrode properties. To this end, the external short circuit portion 40 further includes an insulating body 51 formed of an electrical insulating material, and an insulating cover 53 of an electrical insulating material connected to the insulating body 51 by a living hinge 52.

That is, the insulating body 51 is installed between the shorting tab 41 on the outside of the cap plate 20 and is coupled with the insulating cover 53 on the upper side of the shorting tab 41, thereby providing a negative electrode property. Electrically insulate the cap plate 20 having an anode property from the 41 and at the same time protect the short tab 41. In this case, the insulating body 51 may be installed on the cap plate 20 via the insulating gasket 55.

The shorting tab 41 and the plate terminal are placed on the cap plate 20 by coupling the shorting tab 41 and the plate terminal 21c to the top of the rivet terminal 21a and caulking the top. 21c is coupled to the upper end of the rivet terminal 21a. That is, the shorting tab 41 and the plate terminal 21c are fixed to the cap plate 20 with the insulating body 51 of the external shorting portion 40 interposed therebetween.

The short circuit member 43 is installed in the short circuit hole 42 to close the short circuit hole 42 formed in the cap plate 20. The shorting tab 41 is mechanically and electrically connected to the negative terminal 21 and extends along the outside of the shorting member 43.

Accordingly, the shorting tab 41 and the shorting member 43 correspond to the shorting holes 42, maintain the spaced apart state (solid line state) to face each other, and invert the shorting member 43 when the internal pressure of the secondary battery rises. A short circuit state (virtual line state) can be formed.

In this way, the external short circuit portion 40 is connected to the short circuit tab 41 and the short circuit hole 42 of the cap plate 20 that are mechanically and electrically connected to the negative electrode terminal 21 from the outside of the cap plate 20. It is provided with 43, the short circuit member 43 can be reversed and short-circuited to the short-circuit tab 41 at the set withstand pressure action.

The insulating body 51 electrically insulates the shorting tab 41 to prevent external moisture from entering the inside of the external shorting part 40 and externally cools the air inside the secondary battery and the external shorting part 40. It is configured to be discharged.

The insulating cover 53 is connected to the living hinge 52 provided at one side of the insulating body 51, rotated at the living hinge 52, and coupled to the upper side of the insulating body 51. Therefore, the external moisture is blocked from flowing between the insulating body 51 and the insulating cover 53 and blocked, and the internal pressure and air of the secondary battery may be discharged to the outside through the external short circuit 40.

FIG. 5 is a partial cross-sectional view taken along the line VV of FIG. 3, and FIG. 6 is a partial cross-sectional view taken along the line VI-VI of FIG. 4. 3 to 6, the living hinge 52 is integrally formed with an extension part 54 extending outward from the insulating body 51 to open and close the insulating cover 53.

That is, the living hinge 52 is connected to and formed by the extension 54 formed integrally with the insulating body 51 and the insulating cover 53, thereby enabling the opening and closing of the insulating cover 53 in the insulating body 51. In addition, external moisture may be prevented from penetrating between the insulating body 51 and the insulating cover 53.

For example, the insulating body 51 includes a first side wall 511, a passage 512, and a discharge hole 513. Since the first side wall 511 is disposed in close contact with the outer surface of the cap plate 20 with the first height H11, external moisture may be prevented from entering the interior of the insulating body 51. Since the living hinge 52 is connected to and formed by the extension 54 extending outward from the upper end of the first side wall 511, external moisture may be prevented from flowing into the insulating body 51.

The passage 512 is formed by connecting the extension portion 54 at the upper end of the first side wall 511 to discharge the air inside the insulating body 51 from the external short circuit portion 40 to the outside. The discharge hole 513 penetrates outwardly from the passage 512 of the extension part 54.

The extension part 54 further includes a protrusion 514 protruding toward the cap plate 20 at a height ΔH1 set along the outer side of the discharge hole 513. The protrusion 514 further extends the discharge hole 513.

Since the protrusion 514 having the discharge hole 513 protrudes toward the cap plate 20 from the side of the first side wall 511, external moisture is removed together with the first side wall 511 and the extension 54. It is possible to more effectively block the flow into the inside of the one side wall 511.

The insulation cover 53 further includes a second side wall 531 having a second height H12 to prevent the external moisture from penetrating upward of the external short circuit portion 40 together with the insulation body 51. The second height H12 is smaller than the first height H11.

Since the second side wall 531 is forcibly fitted to the inner surface of the first side wall 511 of the insulating body 51 to the outer surface, the insulating body 51 and the insulating cover 53 are coupled to each other (that is, the outer edge of the insulating cover 51). Moisture permeation can be prevented.

In addition, the insulating body 51 further includes a stepped portion 516 inside the first side wall 511. The stepped part 516 is formed along the outer side of the shorting tab 41 to cover the outer side of the shorting tab 41 downward and to support the second side wall 531 upward. The insulating body 51 may be molded by insert injection, in which the shorting tab 41 is inserted into a mold and molded.

The insulating gasket 55 may be coupled to the lower side of the insulating body 51. The insulating gasket 55 may be interposed on the lower side of the short tab 41 corresponding to the stepped part 516 to improve electrical insulation performance of the short tab 41 and the cap plate 20.

The shorting tab 41 further includes a tab protrusion 411 protruding at a height ΔH2 set in the outward direction corresponding to the shorting hole 42 of the cap plate 20. The tab protrusion 411 may block the penetration of external moisture.

The tab protrusion 411 has a corresponding hole 412 corresponding to the short-circuit hole 42, so that when the short-circuit operation by the inversion of the short-circuit member 43, the internal pressure of the secondary battery and via the cap plate 20 And air may be discharged to the corresponding hole 412.

The insulating cover 53 further includes a third side wall 533 which protrudes in succession to the outside of the tab protrusion 411. The third side wall 533 has a connection groove 534 for discharging the air therein.

The connecting groove 534 connects the inside and the outside of the third side wall 533 between the tab protrusion 411 and the living hinge 52. That is, the connecting groove 534 sets a passage between the upper surface of the lower short tab 41 and discharges the internal air blown out to the corresponding hole 412 of the short tab 41 to the outside.

The inner surface of the third side wall 533 and the outer surface of the tab protrusion 411 form a gap G therebetween to connect the tab protrusion 411 and the corresponding hole 412 to the connection groove 534, thereby Allow the air to escape to the outside.

7 is a plan view of a state in which an external short circuit unit is coupled, and FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII of FIG. 7. 3 to 8, the third side wall 533 of the insulating cover 53 is in close contact with the upper surface of the short-circuit tab 41 between the tab protrusion 411 and the negative electrode terminal 21, thereby causing a gap G. Nevertheless, external moisture may be prevented from flowing into the tab protrusion 411.

That is, the external short circuit part 40 discharges the internal air through the gap G, the connection groove 534, the passage 512, and the discharge hole 513 (EX) and at the same time, the first of the insulating body 51. The first side wall 533 of the side wall 511 and the insulating cover 53 blocks the ingress of external moisture (B1), and the second protrusion of the external tabs by the tab protrusion 411 of the shorting tab 41. Can block (B2).

Meanwhile, the insulating cover 53 includes ribs 535 formed at a height corresponding to the third side wall 533 in the second side wall 531. When the insulating cover 53 is coupled to the insulating body 51, the ribs 535 may stably support the shorting tab 41 to the bottom thereof.

The shorting tab 41 has a rivet hole 413 and fixing holes 414 on the opposite side of the tab protrusion 411. The rivet hole 413 is coupled to the rivet terminal 21a of the negative terminal 21 to enable the withdrawal of the negative terminal 21. The fixing holes 414 are coupled to the fixing protrusion 515 protruding from the insulating body 51 to firmly fix the shorting tab 41 to the insulating body 51.

On the other hand, the insulating cover 53 is provided with a through hole 536 in the adjacent side of the negative electrode terminal 21, it is possible to check the current and resistance through the short-circuit tab 41 in the secondary battery.

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. Naturally, it belongs to the scope of the invention.

(Explanation of the sign)

10: electrode assembly 11, 12: first, second electrode (negative, anode)

11a, 12a: coating

part

11b, 12b: plain part

13: separator 15: case

20: cap plate

21 and 22: first and second electrode terminals (negative and positive terminal)

21a, 22a: rivet terminal 21b, 22b: flange

21c, 22c: plate terminal 24: vent hole

25: vent plate 25a: notch

27: sealing plug 29: electrolyte inlet

36, 37: negative, positive gasket 40: external short circuit

41: Short circuit tab 42: Short circuit hole

43: short circuit member 46: top plate

51: insulated body 52: living hinge

53: insulation cover 54: extension

55: insulating gasket 61: negative electrode insulating member

62: anode insulation member 71, 72: negative, anode lead tab

411: tab protrusion 412: corresponding hole

413 rivet hole 414 fixing hole

511: first side wall 512: passage

513: discharge hole 514: projection

515: fixing protrusion 516: stepped portion

531, 533: second and third side walls 534: connecting groove

535: rib 536: through hole

G: spacing H1, H2: terminal hole

H11, H12: first and second heights ΔH1, ΔH2: heights

Claims

An electrode assembly for charging and discharging current;

A case accommodating the electrode assembly;

A cap plate coupled to the opening of the case and withdrawing the first electrode terminal and the second electrode terminal connected to the electrode assembly to the outside and electrically connected to the second electrode terminal; And

A shorting tab electrically connected to the first electrode terminal at the outside of the cap plate, and a shorting member in the shorting hole of the cap plate, and an external shorting part for shorting the shorting member to the shorting tab when the pressure resistance is set. ,

The outer short circuit

An insulating body electrically insulating and accommodating the shorting tab to block external water inflow and to discharge internal air; and

A secondary battery comprising an insulating cover connected to the insulating body by a living hinge and rotatably coupled to the insulating body to block external moisture from entering the insulating body.
The method of claim 1,

The living hinge

The secondary battery is formed in the extending portion extending outwardly in which the insulating cover is opened and closed in the insulating body.
The method of claim 1,

The insulation body is

A first side wall closely disposed on an outer surface of the cap plate to block external water inflow and connected to the living hinge with a first height, and

A secondary battery comprising a passage and a discharge hole connected from the first side wall to the extension portion to discharge the air therein.
The method of claim 3,

The extension portion

And a protrusion configured to protrude toward the cap plate at a height set along the outer side of the discharge hole to extend the discharge hole.
The method of claim 3,

The insulation cover is

And a second side wall having a second height smaller than the first height so as to block external moisture, the second side wall being forcibly coupled to an inner surface of the first side wall of the insulating body.
The method of claim 5,

The insulation body is

The secondary battery further includes a stepped portion formed along the outer side of the shorting tab in the first side wall to cover the outer side of the shorting tab on the lower side and supporting the second side wall on the upper side.
The method of claim 5,

The paragraph tab

And a tab protrusion protruding to a height set in an outward direction corresponding to the short circuit hole and having a corresponding hole corresponding to the short circuit hole.
The method of claim 7, wherein

The insulation cover is

The secondary battery further comprises a third side wall protruding corresponding to the outer periphery of the tab projection.
The method of claim 8,

The third side wall is

And a connecting groove connecting the inside and the outside of the third side wall between the tab protrusion and the living hinge to discharge the air therein.
The method of claim 9,

An inner surface of the third side wall and an outer surface of the tab protrusion form a gap therebetween to connect the tab protrusion to the connection groove.
The method of claim 8,

The third side wall is

The secondary battery is in close contact with the short-circuit tab between the tab protrusion and the first electrode terminal to block the ingress of moisture.
The method of claim 11,

The insulation cover is

And a rib formed at a height corresponding to the third side wall in the second side wall to support the shorting tab.
The method of claim 7, wherein

The paragraph tab

And a rivet hole coupled to the rivet terminal of the first electrode terminal on the opposite side of the tab protrusion, and having fixed holes coupled to a fixing protrusion protruding from the insulating body.
The method of claim 8,

The first side wall of the insulating body and the third side wall of the insulating cover primarily block the penetration of external moisture,

The tab protrusion of the short-circuit tab secondary to block the penetration of external moisture.