JP2015220115A - Method of manufacturing current cut-off device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a current cut-off device capable of enhancing the weld quality of a reverse plate and a collector plate.SOLUTION: A method of manufacturing a current cut-off device 30 including a reverse plate 52 for connection with the positive electrode terminal 5 of a secondary battery 1, and a collector plate 16 being joined to the reverse plate 52 by welding, and connected with the positive electrode side collector terminal 17a, and cutting off the current path between the positive electrode terminal 5 and positive electrode side collector terminal 17a by deforming the reverse plate 52, when the pressure in a battery case 2 exceeds a predetermined value, includes a press step for pressing the reverse plate 52 to the collector plate 16 side and abutting them, and a joining step for joining the abutting portion of the reverse plate 52 and collector plate 16 by welding.

Description

  The present invention relates to a method for manufacturing a current interrupting device that can improve the welding quality between a reversing plate and a current collecting plate in a current interrupting device included in a secondary battery.

Conventionally, in a secondary battery such as a lithium ion secondary battery, when the pressure in the battery case becomes higher than a predetermined value, an electrode terminal (external terminal) outside the battery case and a current collecting terminal (internal terminal) inside the battery case ) (See Patent Document 1).
The current interrupt device includes a reversing plate connected to the electrode terminal and a current collecting plate connected to the current collecting terminal, and is configured by joining the reversing plate and the current collecting plate by welding, When the pressure in the case becomes higher than a predetermined value, the reverse plate is deformed to divide the reverse plate and the current collector plate.

For example, the current interrupt device 30 shown in FIG. 2 is disposed between the external terminal 14 and the positive current collecting terminal 17a, and is connected to the positive terminal of the secondary battery via the rivet 41 and the external terminal 14. The reversing plate 52 and the current collecting plate 16 connected to the positive current collecting terminal 17a are provided.
The rivet 41 is a substantially cylindrical member having a small-diameter portion 41a that penetrates the lid 22 of the battery case and a large-diameter portion 41b that is disposed inside the battery case, and an upper end (outer end) of the small-diameter portion 41a. The rivet 41 is fixed to the lid body 22 together with the external terminal 14 by caulking the portion.

The reversing plate 52 is a substantially disc-shaped member, and its central portion is joined to the current collector plate 16 in an annular shape by welding. The center part of the reversing plate 52 is recessed downward (inside).
The reversing plate 52 is fitted to the lower end portion of the large-diameter portion 41b of the rivet 41, and the outer peripheral edge of the reversing plate 52 is welded to the large-diameter portion 41b of the rivet 41 over the entire circumference, thereby reversing. A plate 52 is joined to the rivet 41.
A portion where the current collector plate 16 is welded to the reversing plate 52 and its peripheral portion are formed in a thin portion 16a having a smaller thickness than other portions.

In the current interrupting device 30 configured as described above, the pressure inside the battery case (pressure on the current collecting plate 16 side with respect to the reversing plate 52) is the pressure outside the battery case (pressure on the rivet 41 side with respect to the reversing plate 52). ), The central portion of the reversing plate 52 is deformed so as to warp upward toward the upper side.
As a result, the current collector plate 16 is broken at the thin-walled portion 16a on the outer peripheral side of the welded portion with the reversing plate 52, the connecting portion between the reversing plate 52 and the current collecting plate 16 is divided, and the positive electrode outside the battery case is separated. The current path between the terminal and the current collecting terminal inside the battery case is interrupted.

Here, when the current interrupting device 30 is assembled in the manufacturing process of the secondary battery, the fitting portion 41d formed at the lower end portion of the large-diameter portion 41b of the rivet 41 and the outer peripheral edge portion of the reversing plate 52 are all connected. After welding over the circumference, the reversing plate 52 and the thin portion 16a of the current collector plate 16 are welded.
When welding the reversing plate 52 and the current collecting plate 16, the current collecting plate 16 is held by a holder 42 fixed to the lid 22 so that the thin portion 16a and the reversing plate 52 are in contact with each other. Yes.

JP 2012-38529 A

  However, as described above, when the current collector plate 16 is simply held by the holder 42, the dimensions of the components of the current interrupting device 30, such as the reversing plate 52, the current collector plate 16, the rivet 41, the holder 42, and the like. Due to the variation, a gap may be generated between the thin portion 16 a of the current collector plate 16 and the reversing plate 52.

Thus, if welding is performed in a state where a gap is generated between the current collector plate 16 and the reversing plate 52, there is a risk of poor welding.
Specifically, since there is a gap between the current collecting plate 16 and the reversing plate 52, heat from the laser light applied to the current collecting plate 16 is not transmitted to the reversing plate 52, and the reversing plate 52 is sufficiently May not be melted and may cause poor penetration. Further, since there is a gap between the current collecting plate 16 and the reversing plate 52, heat from the laser light is concentrated on the current collecting plate 16, and the welded portion of the current collecting plate 16 is vaporized, thereby generating spatter. There is a risk. Further, since the gap exists between the current collecting plate 16 and the reversing plate 52, when the current collecting plate 16 and the reversing plate 52 melted by the laser light are solidified, the surrounding air is entrained and voids are generated. May occur.

  Therefore, in the present invention, when welding the current collector plate and the reverse plate in the current interrupting device of the secondary battery, the gap between the two is prevented from being generated, and the reverse plate and the current collector plate are welded. It is an object of the present invention to provide a method of manufacturing a current interrupting device that can improve quality.

A method of manufacturing a current interrupt device that solves the above-described problems has the following characteristics.
That is, the reversing plate connected to the external terminal of the secondary battery, and the current collector plate joined to the reversing plate by welding and connected to the internal terminal of the secondary battery, Production of a current interrupting device for interrupting a current path between an external terminal and an internal terminal of the secondary battery by deforming the reversal plate when the pressure in the battery case in the battery becomes higher than a predetermined value. A pressing step of pressing the reversing plate toward the current collecting plate to bring the reversing plate and the current collecting plate into contact with each other; and a contact portion between the reversing plate and the current collecting plate are joined by welding. A joining step.

  The reversing plate is joined to a rivet connected to the external terminal and fixed to the battery case. In the pressing step, gas is supplied into a space surrounded by the reversing plate and the rivet, and then supplied. It is preferable that the reversing plate and the current collecting plate are brought into contact with each other by pressing the reversing plate toward the current collecting plate with the gas.

  The gas is preferably supplied into the space surrounded by the reversing plate and the rivet through a communication hole formed in the rivet and communicating the space with the outside.

  In the pressing step, a pin member is inserted into the battery case, and the reverse plate and the current collector plate are brought into contact with each other by pressing the reverse plate toward the current collector plate with the inserted pin member. It is preferable.

  According to the present invention, no welding failure occurs as in the case where welding is performed in a state where a gap is generated between the current collector plate and the reverse plate, and the welding quality between the current collector plate and the reverse plate is improved. It is possible to improve.

It is side surface sectional drawing which shows the secondary battery provided with the electric current interruption apparatus. It is side surface sectional drawing which shows an electric current interruption apparatus. It is side surface sectional drawing which shows the electric current interruption apparatus at the time of welding an inversion board and a current collection board in the middle of manufacture. It is a figure which shows the flow at the time of welding an inversion board and a current collection board. It is side surface sectional drawing which shows the state which has produced the clearance gap between both at the time of welding of a reversal plate and a current collecting plate. It is side surface sectional drawing which shows a mode that gas is supplied to the space enclosed with the inversion board and the rivet at the time of welding of an inversion board and a current collection board, and an inversion board and a current collection board are contacted. It is side surface sectional drawing which shows the example which formed the gas supply hole for supplying gas in the space enclosed with the inversion board and the rivet in the side surface in the large diameter part of a rivet. It is a figure which shows the flow at the time of welding an inversion board and a current collection board at the time of forming a gas supply hole in the side surface in the large diameter part of a rivet. It is side surface sectional drawing which shows the example comprised so that a reverse plate may be contact | abutted to a current collecting plate by pressing a reverse plate to the current collecting plate side with a pin at the time of welding of a reverse plate and a current collecting plate.

  Next, modes for carrying out the present invention will be described with reference to the accompanying drawings.

A secondary battery 1 shown in FIG. 1 is configured as a non-aqueous electrolyte secondary battery, and is configured by enclosing a wound electrode body 3 and an electrolyte in a battery case 2.
The battery case 2 is composed of a bottomed rectangular tube-shaped case main body 21 with one surface (upper surface) opened, and a lid body 22 that is formed in a flat plate shape and closes the opening of the case main body 21. One end in the direction (right end in FIG. 1) is provided with a positive electrode terminal 5 that is an external terminal on the positive electrode side, and the other end in the longitudinal direction of the lid 22 (left end in FIG. 1) is an external terminal on the negative electrode side. A certain negative electrode terminal 6 is provided.

The positive terminal 5 is connected to an external terminal 14 disposed outside the battery case 2 in the same manner as the positive terminal 5, and the external terminal 14 is fixed to the lid body 22 by a rivet 41. The positive electrode terminal 5 is connected to the positive electrode 3 a of the electrode body 3 via the external terminal 14 and a positive electrode side current collecting terminal 17 a which is an internal terminal arranged inside the battery case 2.
Similarly to the negative electrode terminal 6, the negative electrode terminal 6 is connected to an external terminal 14 disposed outside the battery case 2, and the external terminal 14 is fixed to the lid body 22 by a rivet 41. The negative electrode terminal 6 is connected to the negative electrode 3 b of the electrode body 3 through the external terminal 14 and a negative electrode side current collecting terminal 17 b which is an internal terminal disposed inside the battery case 2.

A current interrupt device (Current Interrupt Device) 30 is interposed between the external terminal 14 connected to the positive electrode terminal 5 and the positive electrode side current collecting terminal 17a, so that the pressure in the battery case 2 is higher than a predetermined value. When it becomes higher, the current interrupting device 30 is activated, and the electrical connection between the positive electrode terminal 5 and the positive current collecting terminal 17 which is the current path of the secondary battery 1, that is, the positive terminal 5 and the positive current collecting terminal 17 are connected. It is comprised so that the electric current path between may be interrupted | blocked.
As shown in FIG. 2, the current interrupt device 30 includes a rivet 41, a holder 42, a reversing plate 52, and a current collecting plate 16.

  The rivet 41 is a substantially cylindrical member having a lower inner diameter dimension and an outer diameter dimension larger than the upper inner diameter dimension and the outer diameter dimension, and a small diameter portion 41a that is an upper small diameter portion; It has a large-diameter portion 41b which is the lower large-diameter portion. The rivet 41 is formed using aluminum or the like as a material.

  The small-diameter portion 41 a of the rivet 41 has a tip protruding above the lid body 22 (more specifically, the external terminal 14 and the upper insulating member 15 placed on the lid body 22), that is, outside the battery case 2. .

  The large-diameter portion 41 b of the rivet 41 is disposed below the lid body 22, that is, inside the battery case 2. The lower end portion of the large-diameter portion 41b has an inner diameter dimension and an outer diameter dimension that are larger than the inner diameter dimension and the outer diameter dimension of other portions of the large-diameter portion 41b, thereby forming a fitting portion 41d. Yes.

The rivet 41 caulks the tip of the small-diameter portion 41 a so that the external terminal 14 and the upper insulating member 15 located on the outside of the lid 22 and the gasket 51 located on the inside of the lid 22 are replaced with the rivet 41. At the same time, it is integrally fixed to the lid 22. Thereby, the rivet 41 is electrically connected to the external terminal 14.
The upper insulating member 15 is a member for insulating between the external terminal 14 and the lid 22, and the gasket 51 is a member for sealing and insulating between the rivet 41 and the lid 22.

The holder 42 is a member that is disposed inside the battery case 2 and holds the current collecting plate 16 connected to the positive current collecting terminal 17a. The holder 42 is formed of an insulating member such as resin.
The holder 42 includes a main body portion 42a that is a plate-like member disposed between the inner side surface of the lid 22 and the rivet 41, and legs that extend downward (inner direction of the battery case 2) from the main body portion 42a. .., And the current collector plate 16 is held by the tips of the legs 42b, 42b.
The rivet 41 and the holder 42 can be integrally formed by insert molding.

The reversing plate 52 is formed in a substantially disc shape whose substantially central portion is recessed toward the inner side (lower side in FIG. 2), and is made of, for example, aluminum.
The reversing plate 52 is disposed inside the battery case 2 and joined to a fitting portion 41 d formed at the tip of the large diameter portion 41 b in the rivet 41. Specifically, with the reversing plate 52 fitted to the fitting portion 41d of the large diameter portion 41b, the outer peripheral edge portion of the reversing plate 52 and the inner peripheral edge portion of the fitting portion 41d are welded over the entire circumference. Thus, the reversing plate 52 is joined to the rivet 41.

  Thereby, the inversion board 52 and the rivet 41 are electrically connected. Further, by joining the large diameter portion 41 b and the reverse plate 52, the pressure chamber 31 that is a space surrounded by the large diameter portion 41 b and the reverse plate 52 is configured.

  The pressure chamber 31 communicates with the outside through a communication hole 41 c that penetrates the small diameter portion 41 a of the rivet 41. That is, the communication hole 41 c formed in the rivet 41 is a hole that communicates the inside of the pressure chamber 31 disposed in the battery case 2 and the outside of the battery case 2. Portions other than the communication hole 41c in the pressure chamber 31 are sealed.

  A circular pressure guide hole is formed at the center of the current collector plate 16, and the outer periphery of the pressure guide hole is joined to the reversing plate 52 by welding over the entire circumference. A portion where the current collector plate 16 is welded to the reversing plate 52 and its peripheral portion are formed in a thin portion 16a having a smaller thickness than other portions. In addition, the current collector plate 16 is connected to the positive current collector terminal 17a.

  In the current interrupt device 30, the pressure in the battery case 2 (pressure on the current collecting plate 16 side with respect to the reversing plate 52) is higher than the pressure outside the battery case 2 (pressure in the pressure chamber 31) by a predetermined value or more. Then, due to the pressure difference between the battery case 2 and the pressure chamber 31, an outward force (upward force in FIG. 2) is applied to the reversing plate 52 through the pressure guide hole, and the reversing plate 52 is located outside (FIG. 2). Deforms to warp upward). Due to the deformation of the reversing plate 52, the current collecting plate 16 breaks at the thin portion 16a on the outer peripheral side of the welded portion with the reversing plate 52, and the joined portion between the current collecting plate 16 and the reversing plate 52 is separated. The current path between the positive terminal 5 and the positive current collecting terminal 17 is interrupted.

  Next, a method of joining the reversing plate 52 and the current collector plate 16 when assembling the current interrupting device 30 configured as described above will be described in detail.

When the current interrupting device 30 is assembled, the reversing plate 52 and the rivet 41 are joined prior to joining the reversing plate 52 and the current collecting plate 16.
The reversing plate 52 is joined to the rivet 41 by crimping the upper end of the small diameter portion 41 a of the rivet 41 and fixing the external terminal 14, the upper insulating member 15, and the gasket 51 together with the rivet 41 to the lid 22 (current collection). In a state before the plate 16 is joined to the holder 42).
The reversing plate 52 is joined to the rivet 41 by placing the external terminal 14, the upper insulating member 15, the gasket 51, and the lid 22 to which the rivet 41 is fixed in a posture in which the small-diameter portion 41 a of the rivet 41 is positioned below. It is done in the state.

When joining the reversing plate 52 to the rivet 41, first, the reversing plate 52 is fitted to the fitting portion 41 d of the large diameter portion 41 b of the rivet 41.
The outer diameter of the reversing plate 52 is slightly smaller than the inner diameter of the fitting portion 41d, and the outer peripheral edge portion of the reversing plate 52 fitted to the fitting portion 41d and the inner peripheral edge portion of the fitting portion 41d. There is a slight gap between them.

  After the reversing plate 52 is fitted to the fitting portion 41d, the outer peripheral edge portion of the reversing plate 52 and the inner peripheral edge portion of the fitting portion 41d in the rivet 41 are welded over the entire circumference. Thereby, the inversion board 52 will be joined to the fitting part 41d airtightly over the perimeter. Further, the pressure chamber 31 is formed by joining the reversing plate 52 and the rivet 41.

  After the reversal plate 52 and the rivet 41 are joined, the current collector plate 16 is attached to the distal ends of the leg portions 42b, 42b,. The current collector plate 16 attached to the holder 42 is held by the holder 42 so that the thin portion 16a and the reversing plate 52 are in contact with each other.

As shown in FIG. 3, welding of the reversing plate 52 and the current collecting plate 16 is performed in a state where the reversing plate 52 is joined to the rivet 41 and the current collecting plate 16 is held by the holder 42.
As shown in FIG. 4, when welding the reversing plate 52 and the current collecting plate 16, the lid 22 with the reversing plate 52 and the current collecting plate 16 attached is attached to the small diameter portion of the rivet 41. 41a is positioned below and the current collector plate 16 is positioned in an upward position and set in the welding process (S01).

Next, a gas such as air is supplied into the pressure chamber 31 through the communication hole 41c of the rivet 41, and the pressure chamber 31 is pressurized (S02). That is, by supplying gas into the pressure chamber 31, the pressure inside the pressure chamber 31 is set to be higher than the pressure outside the pressure chamber 31.
When the inside of the pressure chamber 31 is pressurized by the supplied gas, the reversing plate 52 is pressed toward the current collecting plate 16 by the gas.

  Here, the current collecting plate 16 attached to the holder 42 is held by the holder 42 so that the thin portion 16a and the reversing plate 52 are in contact with each other. However, as shown in FIG. A gap may be generated between the thin portion 16a of the current collecting plate 16 and the reversing plate 52 depending on the dimensional variation of the components of the current interrupting device 30 such as the plate 16, the rivet 41, the holder 42, and the like.

As described above, when a gap is generated between the current collector plate 16 and the reversing plate 52 due to dimensional variation of the component parts, when the pressure chamber 31 is pressurized by supplying gas, as shown in FIG. The reversing plate 52 is pressed by the gas supplied into the pressure chamber 31 and pushed toward the current collecting plate 16, and comes into contact with the current collecting plate 16.
Further, when the current collector plate 16 and the reversing plate 52 are in contact with each other before the gas is supplied into the pressure chamber 31, the reversing plate 52 is moved toward the current collecting plate 16 by the gas supply into the pressure chamber 31. By being pressed, the contact state between the current collector plate 16 and the reversing plate 52 is more reliably maintained.

In this manner, the current collector plate 16 and the reverse plate 52 are welded in a state where the reverse plate 52 pressed toward the current collector plate 16 by the gas supplied into the pressure chamber 31 is in contact with the current collector plate 16. Perform (S03).
The current collector plate 16 and the reversing plate 52 are welded, for example, by irradiating the thin portion 16a with laser light from the current collector plate 16 side (upper side in FIG. 3). Further, the pressurization in the pressure chamber 31 by the gas supply is continued until the welding of the current collector plate 16 and the reversing plate 52 is completed.

As described above, when the current collector plate 16 and the reversing plate 52 are welded in a state where a gap is generated between the current collecting plate 16 and the reversing plate 52 due to the dimensional variation of the component parts, a poor penetration, There is a risk of poor welding such as occurrence of spatter and void.
However, in this embodiment, since the reversing plate 52 is pressed toward the current collecting plate 16 by the gas supplied into the pressure chamber 31 and is brought into contact with the current collecting plate 16, such poor welding is caused. It does not occur and it is possible to improve the welding quality.
In addition, since the supply of gas into the pressure chamber 31 is performed through the communication hole 41c that has been conventionally formed in the rivet 41, there is no need to perform special processing or the like on the components of the current interrupt device 30, and It is possible to improve the welding quality at a low cost.

When welding of the current collector plate 16 and the reversing plate 52 is completed, the supply of gas into the pressure chamber 31 is stopped and the inside of the pressure chamber 31 is released to the atmosphere (S04).
Thereafter, the lid body 22 in which the welding of the current collector plate 16 and the reverse plate 52 is completed is taken out from the welding process (S05).

Further, the gas supply into the pressure chamber 31 performed when the current collector plate 16 and the reversing plate 52 are welded can be performed through a hole other than the communication hole 41 c of the rivet 41.
That is, as shown in FIG. 7, a gas supply hole 41e that connects the inside and the outside of the pressure chamber 31 is formed on the side surface of the large-diameter portion 41b of the rivet 41, and a gas such as air is pressurized through the gas supply hole 41e. The current collector plate 16 and the reversing plate 52 can be welded while being supplied into the chamber 31.

In this case, the current collector plate 16 and the reversing plate 52 are welded as follows.
First, the lid 22 in a state where the reversing plate 52 and the current collector plate 16 are attached is arranged in a posture in which the small diameter portion 41a of the rivet 41 is positioned below and the current collector plate 16 is positioned above. (S11).
Next, the communication hole 41c of the rivet 41 is sealed (closed) by the seal member 61 (S12).

Thereafter, a gas such as air is supplied into the pressure chamber 31 through the gas supply hole 41e of the rivet 41, and the pressure chamber 31 is pressurized (S13).
When the inside of the pressure chamber 31 is pressurized, the current collector plate 16 and the reverse plate 52 are welded in a state where the reverse plate 52 is pressed toward the current collector plate 16 and is in contact with the current collector plate 16. (S14).
After the welding of the current collector plate 16 and the reversing plate 52 is finished, the supply of gas from the gas supply hole 41e into the pressure chamber 31 is stopped, and the inside of the pressure chamber 31 is released to the atmosphere (S15).
Further, the gas supply hole 41e of the rivet 41 is sealed (closed) with a sealing member (S16).
After sealing the gas supply hole 41e, the lid body 22 in which the welding of the current collector plate 16 and the reverse plate 52 is completed is taken out from the welding process (S17).

As described above, the pressure chamber is also connected through the communication hole 41c by welding the current collecting plate 16 and the reversing plate 52 while pressurizing the inside of the pressure chamber 31 by supplying gas through the holes other than the communication hole 41c of the rivet 41. As in the case of supplying gas into the gas 31, the welding quality between the current collector plate 16 and the reversing plate 52 can be improved.
Further, since the gas supply hole 41e is formed in the rivet 41, the operating pressure of the current interrupting device 30 is not affected as in the case where a gas supply hole is formed in the reversing plate 52, for example.

Further, pressing the reversing plate 52 toward the current collecting plate 16 and bringing it into contact with the current collecting plate 16 can be performed by the following configuration.
For example, as shown in FIG. 9, a pin 71 formed in a long columnar shape is inserted into the pressure chamber 31 from the communication hole 41 c of the rivet 41, and inverted by the tip of the pin 71 inserted into the pressure chamber 31. The reversing plate 52 can be brought into contact with the current collecting plate 16 by pressing the plate 52 toward the current collecting plate 16.

However, in the configuration in which the reversing plate 52 is pressed by the pin 71, a contact scratch may occur at a location where the pin 71 contacts the reversing plate 52. If a contact flaw occurs in the reversing plate 52, the operating pressure of the current interrupt device 30 may be affected. Therefore, the configuration in which gas is supplied into the pressure chamber 31 in which such a contact flaw does not occur is better. preferable.
Further, in the configuration in which the reversing plate 52 is pressed by the pin 71, more time is required to move the pin 71 closer to and away from the reversing plate 52 than the time for supplying the gas into the pressure chamber 31. The time required for the welding process increases. Therefore, a configuration in which gas is supplied into the pressure chamber 31 is preferable.

DESCRIPTION OF SYMBOLS 1 Secondary battery 2 Battery case 3 Electrode body 3a Positive electrode 3b Negative electrode 5 Positive electrode terminal 6 Negative electrode terminal 16 Current collecting plate 16a Thin part 17a Positive electrode side current collecting terminal 21 Case main body 22 Lid body 30 Current interruption device 31 Pressure chamber 41 Rivet 41b Large Diameter part 41c Communication hole 52 Reverse plate

Claims (4)

A reversing plate connected to an external terminal of the secondary battery; and a current collecting plate joined to the reversing plate by welding and connected to an internal terminal of the secondary battery, When the pressure in the battery case becomes higher than a predetermined value, the reverse plate is deformed so that the current path between the external terminal and the internal terminal of the secondary battery is cut off. There,
A pressing step of pressing the reversing plate toward the current collecting plate and bringing the reversing plate and the current collecting plate into contact with each other;
A joining step of joining the contact portion between the reversing plate and the current collector plate by welding,
The manufacturing method of the electric current interruption apparatus characterized by the above-mentioned. The reversing plate is joined to a rivet connected to the external terminal and fixed to a battery case,
In the pressing step, a gas is supplied into a space surrounded by the reversing plate and the rivet, and the reversing plate and the current collecting plate are pressed by pressing the reversing plate toward the current collecting plate with the supplied gas. Abut,
The method for manufacturing a current interrupting device according to claim 1. The supply of the gas into the space surrounded by the reversing plate and the rivet is as follows:
Formed on the rivet, through a communication hole that communicates the inside and outside of the space,
The manufacturing method of the electric current interruption apparatus of Claim 2 characterized by the above-mentioned. In the pressing step, a pin member is inserted into the battery case, and the reverse plate and the current collector plate are brought into contact with each other by pressing the reverse plate toward the current collector plate by the inserted pin member.
The method for manufacturing a current interrupting device according to claim 1.

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