JP2010097818A - Electrode terminal support structure, and electrode terminal support method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode terminal support structure and an electrode terminal support method, capable of preventing leak of contents in a container resulting from a rise of internal pressure of the container. <P>SOLUTION: The electrode terminal support structure 1 includes an electrode terminal support member 10 having a through-hole 14 formed therein, and an insulating member 20 having a through-hole 14 and inserted through the through-hole 14. A locking part 13 is plastically deformed so as to extend the diameter while inserting the electrode terminal support member 10 through an electrode terminal leading hole 105c, whereby the locking part 13 is allowed to abut on the peripheral part of the electrode terminal leading hole 105c on the inner circumferential surface of the container 103. Successively, an insulating member 20 inserted through the through-hole 14 is elastically deformed or plastically deformed by plastically deforming a support part 11 of the electrode terminal support member 10 so as to contract the diameter, whereby the insulating member 20 is allowed to abut on the inner circumferential surface of the through-hole 14 of the support member 10 and on the outer circumferential surface of an electrode terminal 101. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure for supporting an electrode terminal on a container.

Conventionally, the structure described in Patent Document 1 is known as a structure for supporting battery electrode terminals, and the structures described in Patent Document 2 and Patent Document 3 are known as structures for supporting electrode terminals of capacitors. Yes.
The structures described in Patent Document 1, Patent Document 2 and Patent Document 3 all have a cylindrical electrode terminal inserted in a hole formed in a battery or capacitor container with an insulating member interposed therebetween. The electrode terminal is fixed to the container by caulking (plastically deforming) one of the end parts arranged inside the container so as to contact the back surface of the container.

Further, as shown in FIG. 11, a ring-shaped electrode terminal support member 510 is welded to a battery container 605, a ring-shaped insulating member 520 is inserted into the electrode terminal support member 510, and the rod-shaped electrode terminal 601 is connected to an insulating member. A method of fixing the electrode terminal 601 to the container 605 by penetrating the electrode 520 and plastically deforming (reducing the diameter of) the electrode terminal supporting member 510 from the outer peripheral surface toward the inner peripheral surface is also being studied.
However, the method shown in FIG. 11 has the following problems.
That is, although an electrode, an electrolyte, and the like are contained as contents in the battery container 605, gas is generated inside the container 605 due to an electrochemical reaction during charging or discharging of the battery, and the container The pressure inside 605 may increase. When the pressure inside the container 605 rises, a load is applied to the welded portion 606 between the electrode terminal support member 510 and the container 605 and the welded portion 606 is peeled off, and the contents of the container 605 or the generated gas is supported by the electrode terminal. There is a case where leakage occurs from a gap between the member 510 and the container 605.
Japanese Utility Model Publication No. 7-27051 JP 2001-237151 A Japanese Patent Laid-Open No. 10-50555

  The present invention has been made in view of the situation as described above, and provides an electrode terminal support structure and an electrode terminal support method capable of preventing leakage of contents of a container due to an increase in pressure inside the container. It is to provide.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, in claim 1,
An electrode terminal support structure for supporting the electrode terminal on the container,
An electrode terminal support member formed with a through hole and fixed in a state of being inserted into the electrode terminal lead hole formed in the container;
An insulating member made of an insulating material, having a through hole penetrating the electrode terminal, and being inserted into the through hole of the electrode terminal support member;
Comprising
The electrode terminal support member is
An outer diameter larger than the electrode terminal lead hole, and a support portion disposed outside the container when the electrode terminal support member is inserted into the electrode terminal lead hole;
An outer diameter is smaller than the electrode terminal lead hole, and when the electrode terminal support member is inserted into the electrode terminal lead hole, a locking part disposed inside the container;
With
The locking portion is
The electrode terminal supporting member is plastically deformed so that a portion corresponding to the locking portion in the through hole is expanded in a state where the electrode terminal supporting member is inserted in the electrode terminal lead hole, thereby the inner peripheral surface of the container Abuts the peripheral edge of the electrode terminal lead hole,
The support part is
In the state where the insulating member is inserted into the through hole of the electrode terminal supporting member and the electrode terminal is inserted into the through hole of the insulating member, a portion corresponding to the support portion in the through hole is reduced in diameter. The insulating member is elastically deformed or plastically deformed by plastic deformation so that the insulating member is brought into contact with the inner peripheral surface of the through hole of the electrode terminal support member and the outer peripheral surface of the electrode terminal. .

In claim 2,
The electrode terminal support member is
The outer peripheral surface is formed at a position sandwiched between the support portion and the locking portion, and has an outer diameter smaller than that of the support portion and larger than that of the locking portion, and is inserted into the electrode terminal lead hole. A step portion is provided that contacts the inner peripheral surface of the electrode terminal lead hole.

In claim 3,
Engaging the outer peripheral surface of the stepped portion with the inner peripheral surface of the electrode terminal lead hole restricts circumferential rotation of the electrode terminal support member and radial displacement of the electrode terminal support member relative to the container. The engaging protrusion to be formed is formed.

In claim 4,
A sealing material applied to a boundary portion between the support portion and the locking portion is provided.

In claim 5,
Applying the sealing material in advance to the peripheral portion of the electrode terminal lead hole on the outer peripheral surface of the container, the peripheral portion of the electrode terminal lead hole on the inner peripheral surface of the container, or the inner peripheral surface of the electrode terminal lead hole, The sealing material is applied to a boundary portion between the support portion and the locking portion by penetrating the electrode terminal support member into the electrode terminal lead hole.

In claim 6,
A sealing material applied to a boundary portion between the step portion and the locking portion is provided.

In claim 7,
Applying the sealing material in advance to the peripheral portion of the electrode terminal lead hole on the outer peripheral surface of the container, the peripheral portion of the electrode terminal lead hole on the inner peripheral surface of the container, or the inner peripheral surface of the electrode terminal lead hole, The sealing material is applied to a boundary portion between the stepped portion and the locking portion by penetrating the electrode terminal supporting member into the electrode terminal lead hole.

In claim 8,
An electrode terminal support member that is fixed in a state where a through hole is formed and is inserted into an electrode terminal lead hole formed in the container;
An insulating member made of an insulating material, having a through hole penetrating the electrode terminal, and penetrating into the through hole of the electrode terminal supporting member;
Comprising
The electrode terminal support member is
An outer diameter larger than the electrode terminal lead hole, and a support portion disposed outside the container when the electrode terminal support member is inserted into the electrode terminal lead hole;
An outer diameter is smaller than the electrode terminal lead hole, and when the electrode terminal support member is inserted into the electrode terminal lead hole, a locking part disposed inside the container;
An electrode terminal support method for supporting the electrode terminal on the container using an electrode terminal support structure comprising:
A first integrated process of penetrating the insulating member into the electrode terminal support member;
A second penetration step of penetrating the electrode terminal support member into an electrode terminal lead hole formed in the container;
In a state where the electrode terminal support member is inserted into the electrode terminal lead-out hole, the engaging portion is plastically deformed so that a portion corresponding to the engaging portion in the through hole is expanded in diameter. A first processing step of bringing the stopper into contact with the peripheral edge of the electrode terminal lead hole on the inner peripheral surface of the container;
A third penetration step of penetrating the electrode terminal into the penetration hole of the insulating member;
The insulating member inserted into the through hole of the electrode terminal support member is elastically deformed or plastically deformed by plastically deforming the support portion so that a portion of the through hole corresponding to the support portion is reduced in diameter. A second processing step of bringing the insulating member into contact with the inner peripheral surface of the through-hole of the electrode terminal support member and the outer peripheral surface of the electrode terminal inserted in the through-hole of the insulating member;
It comprises.

In claim 9,
The electrode terminal support member is
The outer peripheral surface is formed at a position sandwiched between the support portion and the locking portion, and has an outer diameter smaller than that of the support portion and larger than that of the locking portion, and is inserted into the electrode terminal lead hole. A step portion is provided that contacts the inner peripheral surface of the electrode terminal lead hole.

In claim 10,
Engaging the outer peripheral surface of the stepped portion with the inner peripheral surface of the electrode terminal lead hole restricts circumferential rotation of the electrode terminal support member and radial displacement of the electrode terminal support member relative to the container. The engaging protrusion to be formed is formed.

In claim 11,
A sealing material application step of applying a sealing material to a boundary portion between the support portion and the locking portion is provided.

In claim 12,
A sealing material applying step of applying a sealing material to a boundary portion between the stepped portion and the locking portion;

In claim 13,
Sealing material application for applying a sealing material to the peripheral edge portion of the electrode terminal lead hole on the outer peripheral surface of the container, the peripheral edge portion of the electrode terminal lead hole on the inner peripheral surface of the container, or the inner peripheral surface of the electrode terminal lead hole A process.

  The present invention has an effect that it is possible to prevent leakage of contents and the like of a container due to an increase in pressure inside the container.

Hereinafter, a lithium ion secondary battery 100 including electrode terminal support structures 1 and 1 as an embodiment of the electrode terminal support structure according to the present invention will be described with reference to FIGS. 1 and 10.
A lithium ion secondary battery 100 shown in FIG. 1 is a secondary battery (a battery that can be repeatedly charged and discharged) in which lithium ions in an electrolyte are responsible for electrical conduction.
The lithium ion secondary battery 100 mainly includes electrode terminals 101 and 102, a container 103, a pressure control valve 106, and electrode terminal support structures 1 and 1.

The electrode terminals 101 and 102 are one embodiment of the electrode terminal according to the present invention.
In the present embodiment, the electrode terminal 101 is a rod-shaped member made of an aluminum alloy, and the lower end portion of the electrode terminal 101 is welded to the positive electrode (not shown) of the lithium ion secondary battery 100.
In the present embodiment, the electrode terminal 102 is a rod-shaped member made of a nickel alloy, and the lower end of the electrode terminal 102 is welded to the negative electrode (not shown) of the lithium ion secondary battery 100.

The container 103 contains the contents of the lithium ion secondary battery 100, that is, a container in which a separator is sandwiched between a positive electrode and a negative electrode and wound in a flat shape and contains an electrolytic solution, and includes a container body 104 and a lid 105. .
In this embodiment, the separator is a polymer porous film (for example, ion exchange resin film), the positive electrode is an aluminum foil coated with an active material such as lithium cobaltate, and the negative electrode is coated with a carbon material or the like. Copper foil.

  The container main body 104 is a thin rectangular parallelepiped member. One surface of the container body 104 is open, and a space for accommodating the contents of the lithium ion secondary battery 100 is formed inside the container body 104.

The lid 105 is a rectangular plate-like member for closing the open surface of the container body 104. The contents of the lithium ion secondary battery 100 are accommodated in the container body 104 and the contents are sealed in the container 103 by laser welding the container body 104 and the lid 105.
Electrode terminal lead-out holes 105c and 105c are formed in the lid 105 (see FIG. 10). The electrode terminal extraction holes 105 c and 105 c are holes for extracting one end (upper end portion) of the electrode terminals 101 and 102 to the outside of the container 103. The electrode terminals 101 and 102 protrude outside the container 103 through the electrode terminal lead holes 105c and 105c, respectively.

  Container 103 (container body 104 and lid 105) of this embodiment is pure aluminum (JIS A1000 series), or an aluminum alloy (for example, Al-Mn alloy (JIS A3000 series), Al-Mg alloy (JIS A5000 series), etc.) However, the present invention is not limited to this, and the material constituting the container may be another material (for example, a steel material plated with nickel).

The pressure control valve 106 is a valve for preventing the internal pressure of the container 103 from becoming excessive (as a result, the container 103 is damaged), and is opened when the internal pressure of the container 103 exceeds a predetermined value. The gas inside the container 103 is discharged to the outside.
In the present embodiment, the pressure control valve 106 is fixed to the pressure control valve 106 on the lid 105.

Below, the detail of the electrode terminal support structure 1 is demonstrated.
The electrode terminal support structures 1 and 1 support the electrode terminals 101 and 102 on the container 103, respectively. As shown in FIG. 10, the electrode terminal support structure 1 mainly includes an electrode terminal support member 10, an insulating member 20, and a sealing material 30.

The electrode terminal support member 10 is an embodiment of the electrode terminal support member according to the present invention.
As shown in FIG. 10, the electrode terminal support member 10 is fixed to the container 103 (the lid 105) in a state of being inserted into the electrode terminal lead hole 105c formed in the container 103 (the lid 105).
As shown in FIG. 2, the electrode terminal support member 10 includes a support portion 11, a step portion 12, and a locking portion 13, and has a shape in which these are successively connected.
Further, the electrode terminal support member 10 is formed with a through hole 14 which is a hole penetrating from the support portion 11 to the locking portion 13 through the step portion 12.

The support portion 11 is an embodiment of the support portion according to the present invention.
As shown in FIG. 10, when the electrode terminal support member 10 is inserted into the electrode terminal lead hole 105 c formed in the container 103 (the lid 105), the support portion 11 is disposed outside the container 103.
As shown in FIG. 2, the outer shape of the support portion 11 of this embodiment is substantially cylindrical, and the outer diameter R1 of the support portion 11 is larger than the diameter R0 (see FIG. 10) of the electrode terminal lead hole 105c (R1> R0). ).

The step portion 12 is an embodiment of the step portion according to the present invention.
As shown in FIG. 2, the outer shape of the stepped portion 12 of the present embodiment is a substantially cylindrical shape, and is formed in a shape that continues to the support portion 11.
The outer diameter R2 of the stepped portion 12 is smaller than the outer diameter R1 of the support portion 11 (R1> R2) and is the same as or slightly larger than the diameter of the electrode terminal lead hole 105c (R2 ≧ R0 and (R2 / R0) ≈1). . Further, the height of the step portion 12 (length in the axial direction) is substantially the same as the thickness of the lid 105.
As shown in FIG. 10, when the electrode terminal support member 10 is inserted into the electrode terminal lead hole 105c formed in the container 103 (the lid 105), the outer peripheral surface of the step portion 12 is the inner periphery of the electrode terminal lead hole 105c. Contact the surface.
A so-called coarse knurling process is performed on the outer peripheral surface of the stepped portion 12 to form a plurality of protrusions (one embodiment of the engagement protrusion according to the present invention) extending in the axial direction of the electrode terminal support member 10. The
These protrusions engage with (intrude into) the inner peripheral surface of the electrode terminal lead-out hole 105c, thereby rotating the electrode terminal support member 10 in the circumferential direction relative to the container 103 (the lid 105) (rotation about the axis). And the radial displacement (movement in the direction perpendicular to the axis) of the electrode terminal support member 10 are restricted.

The locking part 13 is an embodiment of the locking part according to the present invention.
As shown in FIG. 2, the outer shape of the locking portion 13 of the present embodiment is a substantially cylindrical shape, and is formed in a shape that continues to the support portion 11 with the stepped portion 12 interposed therebetween.
The outer diameter R3 of the locking part 13 is smaller than the outer diameter R1 of the support part 11 and smaller than the outer diameter R2 of the step part 12 (R1>R2> R3).
As shown in FIG. 10, when the electrode terminal support member 10 is inserted into the electrode terminal lead hole 105 c formed in the container 103 (the lid 105), the locking portion 13 is arranged inside the container 103.

  The electrode terminal support member 10 of the present embodiment is made of an aluminum alloy (for example, an Al—Mn alloy (JIS A3000 series), an Al—Mg alloy (JIS A5000 series), etc.), but the present invention is not limited to this. The material constituting the terminal support member may be another material (for example, a nickel-plated steel material).

The insulating member 20 is an embodiment of the insulating member according to the present invention.
As shown in FIG. 3, the insulating member 20 is a cylindrical member having a flange-like flange at one end, and is made of an insulating material (for example, a resin material such as rubber, elastomer, or plastic) that can be plastically deformed or elastically deformed.
The outer diameter R5 of the insulating member 20 is substantially the same as the inner diameter R4 (see FIG. 2) of the portion corresponding to the support portion 11 in the through hole 14 of the electrode terminal support member 10 (R4≈R5).
The insulating member 20 is formed with a through hole 21 that is a hole penetrating from one end of the insulating member 20 to the other end. The inner diameter R6 of the penetration hole 21 is larger than the outer diameter R7 (see FIG. 10) of the electrode terminals 101 and 102 (R6> R7).
In addition, although the insulating member 20 of this embodiment has a flange-shaped ridge at one end thereof, the present invention is not limited to this, and the insulating member may have a cylindrical shape without a flange-shaped ridge. good. However, from the viewpoint of preventing the insulation member from falling off, it is desirable to have a configuration having a flange-like flange at one end.

The sealing material 30 is an embodiment of the sealing material according to the present invention, and improves the sealing performance between the electrode terminal support member 10 and the container 103. The sealing material 30 of this embodiment is made of EPDM (ethylene propylene rubber).
In addition, the sealing material which concerns on this invention is not limited to EPDM like this embodiment. Other specific examples of the sealing material according to the present invention include silicon resin, FIPG (Formed In Place Gasket), and the like.

Below, one Embodiment of the electrode terminal support method which concerns on this invention is described using FIGS. 4-10.
One embodiment of the electrode terminal supporting method according to the present invention is a method of supporting the electrode terminal 101 (electrode terminal 102) on the container 103 using the electrode terminal supporting structure 1.
As shown in FIG. 4, one embodiment of the electrode terminal supporting method according to the present invention is the first consistent mounting step S1100, the sealing material application step S1200, the second penetration step S1300, the first processing step S1400, and the third penetration step. Step S1500 and second processing step S1600 are provided.
In addition, the order of 1st consistent mounting process S1100, sealing material application | coating process S1200, 2nd penetration process S1300, 1st process process S1400, 3rd penetration process S1500, and 2nd process process S1600 which are shown in FIG. 4 is an example to the last. Thus, the electrode terminal support method according to the present invention can be arbitrarily changed within a range in which the method is established.

1st consistent mounting process S1100 is one Embodiment of the 1st consistent mounting process which concerns on this invention, and is a process of penetrating the insulating member 20 to the electrode terminal support member 10. FIG.
As shown in FIG. 5, when the insulating member 20 is inserted into the electrode terminal support member 10, the outer peripheral surface of the insulating member 20 corresponds to the support portion 11 among the inner peripheral surfaces of the through holes 14 of the electrode terminal support member 10. Abuts the part.
Further, a step is formed at the end portion of the through hole 14 on the support portion 11 side, and the flange of the insulating member 20 is engaged with the step, so that the insulating member 20 slides along the through hole 14 and penetrates. It does not fall off from the end of the hole 14 on the locking portion 13 side.
When the first consistent mounting step S1100 is completed, the process proceeds to the sealing material application step S1200.

The sealing material application step S1200 is an embodiment of the sealing material application step according to the present invention. The sealing material 30 is a boundary portion between the support portion 11 and the locking portion 13 of the electrode terminal support member 10 (in this embodiment, an electrode). Since the step portion 12 is formed at a position sandwiched between the support portion 11 and the locking portion 13 of the terminal support member 10, strictly speaking, it is a step of applying to the boundary portion between the step portion 12 and the locking portion 13. .
As shown in FIG. 6, the electrode terminal support member 10 is sealed at the boundary portion between the step portion 12 and the locking portion 13, that is, along the boundary line between the end surface of the step portion 12 and the outer peripheral surface of the locking portion 13. Material 30 is applied.
When the sealing material application step S1200 is completed, the process proceeds to the second penetration step S1300.

In this embodiment, the sealing material 30 is applied to the boundary portion between the support portion 11 and the locking portion 13 of the electrode terminal support member 10 in the sealing material application step S1200. However, the present invention is not limited to this. Absent.
For example, the peripheral portion of the electrode terminal lead hole 105c on the outer peripheral surface of the container 103 (the lid 105) before the electrode terminal support member 10 is inserted through the electrode terminal lead hole 105c in the sealing material application step S1200, the container 103 The sealing material 30 is applied to the peripheral portion of the electrode terminal lead hole 105c on the inner peripheral surface of the lid 105) or to the inner peripheral surface of the electrode terminal lead hole 105c, and then the electrode terminal support member 10 is passed through the electrode terminal lead hole 105c. It is good also as a structure which apply | coats a sealing material to the boundary part (boundary part of the level | step-difference part 12 and the latching | locking part 13) of the support part 11 and the latching | locking part 13 by mounting.

The second penetration step S1300 is an embodiment of the second penetration step according to the present invention, and the electrode terminal support member 10 is penetrated into the electrode terminal lead hole 105c formed in the container 103 (the lid 105). It is a process.
As shown in FIG. 7, when the electrode terminal support member 10 is inserted into the electrode terminal lead hole 105c, the end surface of the support portion 11 (the end surface facing the stepped portion 12) is the electrode terminal lead hole 105c on the surface 105a of the lid 105. The outer peripheral surface of the stepped portion 12 contacts the inner peripheral surface of the electrode terminal lead hole 105c. Further, the plurality of protrusions formed on the outer peripheral surface of the stepped portion 12 are engaged by being press-fitted into the inner peripheral surface of the electrode terminal lead hole 105c.
If 2nd penetration process S1300 is complete | finished, it will transfer to 1st process process S1400.

The first machining step S1400 is an embodiment of the first machining step according to the present invention. In the state where the electrode terminal supporting member 10 is inserted into the electrode terminal lead hole 105c, the first machining step S1400 is formed in the engaging portion 13 in the through hole 14. The engaging portion 13 is plastically deformed so that the corresponding portion is expanded in diameter (the inner diameter of the portion corresponding to the engaging portion 13 in the through hole 14 is increased), so that the engaging portion 13 is moved to the inner peripheral surface of the container 103. (In the case of the present embodiment, this is a step of contacting the peripheral edge portion of the electrode terminal lead hole 105c in the back surface 105b of the lid 105).
As shown in FIG. 8, when the locking portion 13 is plastically deformed (the locking portion 13 is expanded) so that a portion corresponding to the locking portion 13 in the through hole 14 is expanded, the locking portion 13 is covered with the lid. 105 is in contact with the peripheral edge portion of the electrode terminal lead hole 105 c on the back surface 105 b of 105.
As a specific method for plastically deforming the locking portion 13, a known method such as a punch press or a rotary press can be employed.
If 1st process process S1400 is complete | finished, it will transfer to 3rd penetration process S1500.

  When the first processing step S1400 is completed, the peripheral edge portion of the electrode terminal lead-out hole 105c in the lid 105 is sandwiched between the support portion 11 and the locking portion 13, and the electrode terminal support member 10 cannot be detached from the lid 105. Fixed.

  When the pressure inside the container 103 rises, the electrode terminal support member 10 is subjected to a force that pushes the electrode terminal support member 10 to the outside of the container 103. It will strongly contact the peripheral edge of the electrode terminal lead hole 105c on the back surface 105b of the 105, and on the contrary, the sealing performance (liquid tightness and air tightness) between the electrode terminal supporting member 10 and the lid 105 is improved.

Further, the sealing material 30 applied to the boundary portion between the stepped portion 12 and the locking portion 13 of the electrode terminal support member 10 is (α) the locking portion 13 and the lid 105 when the locking portion 13 is plastically deformed. The gap between the back surface 105b of the electrode terminal lead-out hole 105c and the peripheral edge of the electrode terminal lead-out hole 105c, (β) the gap between the outer peripheral surface of the stepped portion 12 and the inner peripheral surface of the electrode terminal lead-out hole 105c, and (γ) It flows into the gap between the surface 105a of the electrode 105 and the peripheral edge of the electrode terminal lead hole 105c.
As a result, the sealing performance between the electrode terminal support member 10 and the lid 105 is further improved.

If the stepped portion 12 is omitted from the electrode terminal support member 10, the locking portion 13 will be plastically deformed in such a way that it is bent at a position corresponding to the edge on the back surface 105b side of the electrode terminal lead hole 105c. Since the bent portion has a gentle curve, the engaging portion 13 has an edge portion of the electrode terminal lead hole 105c on the back surface 105b of the lid 105 (in particular, the electrode in the peripheral portion of the electrode terminal lead hole 105c on the back surface 105b of the lid 105). The portion close to the terminal lead-out hole 105c) cannot be satisfactorily abutted and is separated from the back surface 105b of the lid 105.
On the other hand, in the present embodiment, the outer surface R3 of the locking portion 13 is plastically deformed by bending at the boundary line between the end surface of the stepped portion 12 and the outer peripheral surface of the locking portion 13, and the outer diameter R3 of the locking portion 13 is the stepped portion. 12 is smaller than the outer diameter R2, and the boundary portion between the stepped portion 12 and the locking portion 13 is somewhat from the edge portion of the electrode terminal lead hole 105c on the back surface 105b of the lid 105 (only the difference between R2 and R3 in terms of distance). It is arranged at a distant position. Therefore, the locking portion 13 can also come into contact with the edge portion of the electrode terminal lead hole 105 c on the back surface 105 b of the lid 105.
As described above, since the step portion 12 is formed, the contact between the locking portion 13 and the back surface 105b of the lid 105 (particularly, the edge portion of the electrode terminal lead hole 105c) is more reliably performed. And the sealing property between the lid 105 and the lid 105 are improved.

The third penetration step S1500 is an embodiment of the third penetration step according to the present invention, and is a step of penetrating the electrode terminal 101 (electrode terminal 102) into the penetration hole 21 of the insulating member 20.
As shown in FIG. 9, in this embodiment, the inner diameter R <b> 6 of the penetration hole 21 is larger than the outer diameter R <b> 7 (see FIG. 10) of the electrode terminals 101 and 102, so that the electrode terminal 101 (electrode terminal 102) In the state of being inserted into the through hole 21, there is a gap between the outer peripheral surface of the electrode terminal 101 (electrode terminal 102) and the inner peripheral surface of the through hole 21 of the insulating member 20.
If 3rd penetration process S1500 is complete | finished, it will transfer to 2nd process process S1600.

The second machining step S1600 is an embodiment of the second machining step according to the present invention, and the diameter of the portion corresponding to the support portion 11 in the through hole 14 is reduced (the portion corresponding to the support portion 11 in the through hole 14). By deforming the support portion 11 plastically so that the inner diameter becomes smaller), the insulating member 20 inserted in the through hole 14 of the electrode terminal supporting member 10 is elastically deformed or plastically deformed, and the insulating member 20 is transformed into the electrode terminal supporting member. This is a step of contacting the inner peripheral surface of the ten through holes 14 and the outer peripheral surface of the electrode terminal 101 (electrode terminal 102) inserted in the through hole 21 of the insulating member 20.
As shown in FIG. 10, the insulating member 20 is inserted into the through hole 14 of the electrode terminal supporting member 10, and the electrode terminal 101 (electrode terminal 102) is inserted into the through hole 21 of the insulating member 20. When the outer peripheral surface of the support portion 11 of the terminal support member 10 is plastically deformed so as to be depressed over the entire circumference, a portion corresponding to the support portion 11 on the inner circumference surface of the through hole 14 of the electrode terminal support member 10 is located on the inner side over the entire circumference. Swells out.
Accordingly, a portion of the inner peripheral surface of the through hole 14 corresponding to the support portion 11 presses the outer peripheral surface of the insulating member 20 to elastically deform or plastically deform the insulating member 20, and the outer peripheral surface of the insulating member 20 extends over the entire periphery. The inner peripheral surface of the through hole 21 of the insulating member 20 bulges over the entire circumference while being recessed, and the bulged portion of the inner peripheral surface of the through hole 21 of the insulating member 20 is the outer peripheral surface of the electrode terminal 101 (electrode terminal 102). Abut.
As a result, the electrode terminal 101 (electrode terminal 102) is supported by the electrode terminal support structure 1 so as not to be detached from the container 103 (lid 105).
In addition, the gap between the electrode terminal support structure 1 and the electrode terminal 101 (electrode terminal 102) is closed, and the contents accommodated in the container 103 are between the electrode terminal support structure 1 and the electrode terminal 101 (electrode terminal 102). There is no leakage to the outside of the container 103 through the gap.

  In the second machining step S1600, the support portion 11 is formed on the support portion 11 of the inner peripheral surface of the through hole 14 of the electrode terminal support member 10 by plastic deformation so that the outer peripheral surface of the support portion 11 of the electrode terminal support member 10 is recessed over the entire circumference. Specific methods for bulging the corresponding portion inward over the entire circumference are disclosed in JP-A-2005-183359, JP-A-2001-176495, JP-A-7-127746, and JP-A-7-235289. It is possible to employ known methods including the method disclosed in Japanese Patent Laid-Open No. 8-250083 or Japanese Patent Laid-Open No. 8-250083.

As described above, the electrode terminal support structure 1 has the following structure.
The electrode terminal 101 (electrode terminal 102) is supported by the container 103,
An electrode terminal support member 10 formed with a through hole 14 and fixed in a state of being inserted into an electrode terminal lead hole 105c formed in the container 103 (the lid 105);
An insulating member 20 made of an insulating material, having a through hole 21 that penetrates the electrode terminal 101 (electrode terminal 102), and penetrates the through hole 14 of the electrode terminal support member 10,
Comprising
The electrode terminal support member 10 is
A support portion 11 that has an outer diameter larger than the electrode terminal lead hole 105c (diameter thereof) and is disposed outside the container 103 when the electrode terminal support member 10 is inserted into the electrode terminal lead hole 105c;
A locking portion 13 disposed inside the container 103 when the outer diameter is smaller than the electrode terminal lead hole 105c and the electrode terminal support member 10 is inserted into the electrode terminal lead hole 105c;
With
The locking portion 13 is
When the electrode terminal supporting member 10 is inserted into the electrode terminal lead hole 105c, the inner peripheral surface (the lid) of the container 103 is plastically deformed so that the portion corresponding to the locking portion 13 in the through hole 14 is enlarged. In contact with the peripheral edge of the electrode terminal lead hole 105c on the back surface 105b) of 105,
The support part 11
The insulating member 20 is inserted into the through hole 14 of the electrode terminal supporting member 10 and the electrode terminal 101 (electrode terminal 102) is inserted into the through hole 21 of the insulating member 20 so as to support the support portion 11 in the through hole 14. The insulating member 20 is elastically deformed or plastically deformed so that the portion corresponding to the diameter of the insulating member 20 is reduced in diameter. The terminal 102) is brought into contact with the outer peripheral surface.
By configuring in this way, it is possible to prevent the contents of the container 103 from leaking due to an increase in the pressure inside the container 103.

The electrode terminal support member 10 of the electrode terminal support structure 1 is
The outer peripheral surface is formed at a position sandwiched between the support portion 11 and the locking portion 13, and has an outer diameter smaller than that of the support portion 11 and larger than that of the locking portion 13. A step portion 12 is provided in contact with the inner peripheral surface of the electrode terminal lead hole 105c.
With this configuration, the contact between the locking portion 13 and the container 103 (more precisely, the peripheral edge portion of the electrode terminal lead-out hole 105c on the back surface 105b of the lid 105) is more reliably performed. The sealing performance between the member 10 and the container 103 (lid 105) is improved.

Further, the outer circumferential surface of the stepped portion 12 of the electrode terminal support member 10 is engaged with the inner circumferential surface of the electrode terminal lead hole 105c to rotate the electrode terminal support member 10 in the circumferential direction relative to the container 103 (lid 105). Engagement protrusions (in the present embodiment, a plurality of ridges) that restrict the radial displacement of the electrode terminal support member 10 are formed.
With this configuration, the electrode terminal support member 10 is firmly fixed by the container 103, and the locking portion (the engagement protrusion between the electrode terminal support member 10 and the container 103 (lid 105) is attached to the lid 105. The mechanical strength of the biting portion is improved, and it is possible to prevent loosening between the electrode terminal support member 10 and the container 103 (lid 105) due to vibration over a long period of time. As a result, the electrode terminal support member 10 and the container 103 (lid 105) is improved in sealing performance.
Further, when forming a screw on the outer peripheral surface of the portion of the electrode terminal 101 (electrode terminal 102) that protrudes outside the container 103 and screwing the electrode terminal 101 (electrode terminal 102) with another member, Since the electrode terminal 101 (electrode terminal 102) is fixed to the container 103 through the electrode terminal support structure 1 so as not to be relatively rotatable, it can be easily screwed with another member.

The electrode terminal support structure 1 is
A sealing material 30 is provided that is applied to a boundary portion between the support portion 11 and the locking portion 13 (in the case of this embodiment, strictly speaking, a boundary portion between the step portion 12 and the locking portion 13).
By comprising in this way, the sealing performance between the electrode terminal support member 10 and the lid | cover 105 further improves.
Especially when it is difficult to set a large area where the locking part and the peripheral edge of the electrode terminal lead hole on the inner peripheral surface of the container come into contact due to restrictions such as the shape of the container, or when the pressure inside the container is large The effect is great.

  Although the external shape of the support part 11, the level | step difference part 12, and the latching | locking part 13 of the electrode terminal support member 10 of this embodiment is a substantially cylindrical shape, this invention is not limited to this. That is, the outer shape of the support portion, the step portion, and the locking portion of the electrode terminal support member according to the present invention may be polygonal.

Although the outer diameter of the support part 11 of the electrode terminal support member 10 of this embodiment is constant over an axial direction, this invention is not limited to this.
That is, in the electrode terminal support member according to the present invention, if the outer diameter of at least the end contacting the outer peripheral surface of the container is larger than the electrode terminal lead hole, the electrode terminal support member passes through the electrode terminal lead hole and passes through the inside of the container. As long as these conditions are satisfied, the outer diameter of the electrode terminal support member other than the end that contacts the outer peripheral surface of the container may be smaller than the electrode terminal lead hole.

The length in the axial direction of the locking portion before plastic deformation is the area where the locking portion abuts the peripheral edge of the electrode terminal lead-out hole on the inner peripheral surface of the container after plastic deformation, and thus between the electrode terminal support member and the container. From the viewpoint of improving the sealing performance between the electrode terminal support member and the container, it is desirable to set the length in the axial direction of the locking portion before plastic deformation as long as possible. .
However, if the length in the axial direction of the locking portion before plastic deformation is too long, plastic deformation becomes difficult or the locking portion after plastic deformation interferes with other members. . Therefore, it is desirable to set the length in the axial direction of the locking portion before plastic deformation to an appropriate length in consideration of the assumed internal pressure of the container or the material of the electrode terminal support member.

As described above, one embodiment of the electrode terminal supporting method according to the present invention is as follows.
A method of supporting an electrode terminal 101 (electrode terminal 102) on a container 103 using the electrode terminal support structure 1,
A first consistent mounting step S1100 for penetrating the insulating member 20 into the electrode terminal support member 10;
A second penetration step S1300 for penetrating the electrode terminal support member 10 into the electrode terminal lead-out hole 105c formed in the container 103 (the lid 105);
In a state where the electrode terminal support member 10 is inserted into the electrode terminal lead hole 105c, the locking portion 13 is plastically deformed so that the diameter of the portion corresponding to the locking portion 13 in the through hole 14 is increased. A first processing step S1400 in which the portion 13 is brought into contact with the peripheral portion of the electrode terminal lead hole 105c on the inner peripheral surface of the container 103 (in the case of the present embodiment, the back surface 105b of the lid 105);
A third penetration step S1500 for penetrating the electrode terminal 101 (electrode terminal 102) into the penetration hole 21 of the insulating member 20,
The support member 11 is plastically deformed so that the portion of the through hole 14 corresponding to the support member 11 is reduced in diameter, thereby elastically deforming or plastically deforming the insulating member 20 inserted in the through hole 14 of the electrode terminal support member 10. And the insulating member 20 is brought into contact with the inner peripheral surface of the through hole 14 of the electrode terminal supporting member 10 and the outer peripheral surface of the electrode terminal 101 (electrode terminal 102) inserted in the through hole 21 of the insulating member 20. Processing step S1600;
It comprises.
By configuring in this way, it is possible to prevent the contents of the container 103 from leaking due to an increase in the pressure inside the container 103.

One embodiment of the electrode terminal supporting method according to the present invention is as follows:
A sealing material application step S1200 for applying the sealing material 30 to the boundary portion between the support portion 11 and the locking portion 13 (in the present embodiment, strictly, the boundary portion between the step portion 12 and the locking portion 13) is provided. .
By comprising in this way, the sealing performance between the electrode terminal support member 10 and the lid | cover 105 further improves.
Especially when it is difficult to set a large area where the locking part and the peripheral edge of the electrode terminal lead hole on the inner peripheral surface of the container come into contact due to restrictions such as the shape of the container, or when the pressure inside the container is large The effect is great.

One embodiment of the electrode terminal supporting method according to the present invention is the first consistent mounting step S1100, the sealing material application step S1200, the second penetration step S1300, the first machining step S1400, the third penetration step S1500, the second machining. Although these steps are performed in the order of step S1600, the present invention is not limited to this, and the order in which these steps are performed can be changed as appropriate.
For example, it is good also as a structure by which these processes are performed in order of 2nd penetration process S1300, 1st consistent installation process S1100, 3rd penetration process S1500, sealing material application | coating process S1200, and 1st process process S1400.

The electrode terminal support structure and the electrode terminal support method according to the present invention are widely applied to articles that are energized between the inside and the outside of a container using electrode terminals.
Specific examples of articles to which the electrode terminal support structure and electrode terminal support method according to the present invention can be applied include (a) lithium ion secondary batteries, lead storage batteries, nickel / hydrogen storage batteries, nickel / cadmium storage batteries, etc. Various secondary batteries such as (b) phosphoric acid fuel cell (PAFC), polymer electrolyte fuel cell (PEFC), molten carbonate fuel cell (MCFC), solid oxide fuel cell (SOFC), etc. Examples include fuel cells, (c) electrolytic capacitors (capacitors), and the like.

The perspective view which shows the lithium ion secondary battery with which one Embodiment of the electrode terminal support structure which concerns on this invention is applied. The figure which shows the electrode terminal support member in one Embodiment of the electrode terminal support structure which concerns on this invention. The figure which shows the insulating member in one Embodiment of the electrode terminal support structure which concerns on this invention. The flowchart which shows one Embodiment of the electrode terminal support method which concerns on this invention. Side surface sectional drawing which shows the state at the time of completion | finish of the 1st consistent mounting process of one Embodiment of the electrode terminal support structure which concerns on this invention. Side surface sectional drawing which shows the state at the time of completion | finish of the sealing material application | coating process of one Embodiment of the electrode terminal support structure which concerns on this invention. Side surface sectional drawing which shows the state at the time of completion | finish of the 2nd penetration process of one Embodiment of the electrode terminal support structure which concerns on this invention. Side surface sectional drawing which shows the state at the time of completion | finish of the 1st process process of one Embodiment of the electrode terminal support structure which concerns on this invention. Side surface sectional drawing which shows the state at the time of completion | finish of the 3rd penetration process of one Embodiment of the electrode terminal support structure which concerns on this invention. Side surface sectional drawing which shows the state at the time of completion | finish of the 2nd manufacturing process of one Embodiment of the electrode terminal support structure which concerns on this invention. Side surface sectional drawing which shows the conventional electrode terminal support structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrode terminal support structure 10 Electrode terminal support member 11 Support part 12 Step part 13 Locking part 14 Through hole 20 Insulating member 21 Through hole 101 Electrode terminal 102 Electrode terminal 103 Container 104 Container body 105 Lid 105c Electrode terminal extraction hole

Claims (13)

An electrode terminal support structure for supporting the electrode terminal on the container,
An electrode terminal support member formed with a through hole and fixed in a state of being inserted into the electrode terminal lead hole formed in the container;
An insulating member made of an insulating material, having a through hole penetrating the electrode terminal, and being inserted into the through hole of the electrode terminal support member;
Comprising
The electrode terminal support member is
An outer diameter larger than the electrode terminal lead hole, and a support portion disposed outside the container when the electrode terminal support member is inserted into the electrode terminal lead hole;
An outer diameter is smaller than the electrode terminal lead hole, and when the electrode terminal support member is inserted into the electrode terminal lead hole, a locking part disposed inside the container;
With
The locking portion is
The electrode terminal supporting member is plastically deformed so that a portion corresponding to the locking portion in the through hole is expanded in a state where the electrode terminal supporting member is inserted in the electrode terminal lead hole, thereby the inner peripheral surface of the container Abuts the peripheral edge of the electrode terminal lead hole,
The support part is
In the state where the insulating member is inserted into the through hole of the electrode terminal supporting member and the electrode terminal is inserted into the through hole of the insulating member, the portion corresponding to the support portion in the through hole is reduced in diameter. Electrode terminal support in which the insulating member is elastically deformed or plastically deformed by plastic deformation so that the insulating member abuts on the inner peripheral surface of the through hole of the electrode terminal support member and the outer peripheral surface of the electrode terminal. Construction. The electrode terminal support member is
The outer peripheral surface is formed at a position sandwiched between the support portion and the locking portion, and has an outer diameter smaller than that of the support portion and larger than that of the locking portion, and is inserted into the electrode terminal lead hole. The electrode terminal support structure according to claim 1, further comprising a step portion that contacts the inner peripheral surface of the electrode terminal lead hole.   Engaging the outer peripheral surface of the stepped portion with the inner peripheral surface of the electrode terminal lead hole restricts circumferential rotation of the electrode terminal support member and radial displacement of the electrode terminal support member relative to the container. The electrode terminal support structure according to claim 2, wherein an engaging protrusion is formed.   The electrode terminal support structure according to claim 1, further comprising a sealing material applied to a boundary portion between the support portion and the locking portion.   Applying the sealing material in advance to the peripheral portion of the electrode terminal lead hole on the outer peripheral surface of the container, the peripheral portion of the electrode terminal lead hole on the inner peripheral surface of the container, or the inner peripheral surface of the electrode terminal lead hole, The electrode terminal support structure according to claim 4, wherein the seal material is applied to a boundary portion between the support portion and the locking portion by penetrating the electrode terminal support member into the electrode terminal lead hole.   The electrode terminal support structure according to claim 2, further comprising a sealing material applied to a boundary portion between the stepped portion and the locking portion.   Applying the sealing material in advance to the peripheral portion of the electrode terminal lead hole on the outer peripheral surface of the container, the peripheral portion of the electrode terminal lead hole on the inner peripheral surface of the container, or the inner peripheral surface of the electrode terminal lead hole, The electrode terminal support structure according to claim 6, wherein the seal material is applied to a boundary portion between the step portion and the locking portion by penetrating the electrode terminal support member into the electrode terminal lead hole. An electrode terminal support member that is fixed in a state where a through hole is formed and is inserted into an electrode terminal lead hole formed in the container;
An insulating member made of an insulating material, having a through hole penetrating the electrode terminal, and penetrating into the through hole of the electrode terminal supporting member;
Comprising
The electrode terminal support member is
An outer diameter larger than the electrode terminal lead hole, and a support portion disposed outside the container when the electrode terminal support member is inserted into the electrode terminal lead hole;
An outer diameter is smaller than the electrode terminal lead hole, and when the electrode terminal support member is inserted into the electrode terminal lead hole, a locking part disposed inside the container;
An electrode terminal support method for supporting the electrode terminal on the container using an electrode terminal support structure comprising:
A first integrated process of penetrating the insulating member into the electrode terminal support member;
A second penetration step of penetrating the electrode terminal support member into an electrode terminal lead hole formed in the container;
In a state where the electrode terminal support member is inserted into the electrode terminal lead-out hole, the engagement portion is plastically deformed so that a portion corresponding to the engagement portion in the through hole is expanded in diameter. A first processing step of bringing the stopper into contact with the peripheral edge of the electrode terminal lead hole on the inner peripheral surface of the container;
A third penetration step of penetrating the electrode terminal into the penetration hole of the insulating member;
The insulating member inserted into the through hole of the electrode terminal support member is elastically deformed or plastically deformed by plastically deforming the support portion so that a portion of the through hole corresponding to the support portion is reduced in diameter. A second processing step of bringing the insulating member into contact with the inner peripheral surface of the through hole of the electrode terminal supporting member and the outer peripheral surface of the electrode terminal that is inserted into the through hole of the insulating member;
An electrode terminal supporting method comprising: The electrode terminal support member is
The outer peripheral surface is formed at a position sandwiched between the support portion and the locking portion, and has an outer diameter smaller than that of the support portion and larger than that of the locking portion, and is inserted into the electrode terminal lead hole. The electrode terminal support method according to claim 8, further comprising a stepped portion that abuts against an inner peripheral surface of the electrode terminal lead hole.   Engaging the outer peripheral surface of the stepped portion with the inner peripheral surface of the electrode terminal lead hole restricts circumferential rotation of the electrode terminal support member and radial displacement of the electrode terminal support member relative to the container. The electrode terminal supporting method according to claim 9, wherein the engaging protrusion is formed.   The electrode terminal supporting method according to claim 8, further comprising a sealing material application step of applying a sealing material to a boundary portion between the support portion and the locking portion.   The electrode terminal supporting method according to claim 9 or 10, further comprising a sealing material application step of applying a sealing material to a boundary portion between the stepped portion and the locking portion.   Sealing material application for applying a sealing material to the peripheral edge portion of the electrode terminal lead hole on the outer peripheral surface of the container, the peripheral edge portion of the electrode terminal lead hole on the inner peripheral surface of the container, or the inner peripheral surface of the electrode terminal lead hole The electrode terminal supporting method according to any one of claims 8 to 10, further comprising a step.

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