JP2014057036A - Joint inspection method of metal terminal for sealed electrochemical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection method for inspecting if a metal terminal for a sealed electrochemical device that is integrally molded with a synthetic resin material in a resin vessel member is tightly jointed to the resin vessel member as prescribed in the sealed electrochemical device such as a capacitor and a lithium battery which have electrolyte.SOLUTION: In a metal terminal for a sealed electrochemical device that is integrally molded with a resin vessel member 2 made of a synthetic resin forming a sealed vessel, a rod body 4 is formed by integral molding in protruded state from a surface of the metal terminal 1 when integrally molding the metal terminal, a load of stress applied in a direction of pushing down the rod body 4 while causing no deformation of the metal terminal is applied to rupture the base part 4a of the rod body 4, the residual state of the ruptured synthetic resin is visually inspected, and the jointed state in which the resin vessel member 2 is integrally molded with the metal terminal 1 is thereby inspected in this joint inspection.

Description

  The present invention relates to a method for inspecting a joined state in which a metal terminal for a sealed electrochemical device such as a capacitor having an electrolytic solution or a lithium battery and a sealed container are integrally formed.

  In sealed electrochemical devices such as capacitors with electrolyte and lithium batteries, the divided container members are combined into a sealed container, and one of the container members is integrated with a resin container member formed of a synthetic resin material. In the metal terminal molded into a metal terminal, the joint between the metal terminal and the resin container member may be peeled off due to the difference in thermal expansion coefficient, thermal conductivity, etc. between the metal material of the metal terminal and the synthetic resin material of the resin container member. A gap is formed in the joint, and the electrolyte solution evaporates and leaks outside the sealed container. Therefore, when the metal terminal is integrally formed with the resin container member formed of this synthetic resin material, the joint is in close contact, in other words, Tight bonding is necessary. Therefore, it is necessary to inspect whether or not the bonded state is tightly bonded.

  Therefore, as a method for inspecting the joining state at the joining portion as described above, as shown in Patent Document 1, from the viewpoint of confidentiality of the joining state, an electrolytic capacitor sealing lid molding in which a metal electrode terminal portion is integrally formed. As an inspection method by air leakage, the confidentiality of the electrode terminal part of the body (corresponding to the container member) and the synthetic resin is inspected by air leakage, and the electrolytic capacitor sealing lid molded body in which this electrode terminal part is integrally molded with the synthetic resin A metal terminal bonding inspection method is proposed that has an inspection device that is mounted on a jig to be inspected consisting of a pair of mating recesses, presses air into the upper mating recess, and detects air leaking at the lower mating recess. Has been.

  However, in the inspection method of Patent Document 1, in order to inspect for air leakage, the upper and lower fitting recesses of the jig to be inspected are kept secret and prevent the leakage of press-fitted air. There is a need to.

Japanese Patent Laid-Open No. 11-248588

  In order to solve the above-mentioned problems, the present invention is a sealed electrochemical device such as a capacitor having an electrolytic solution or a lithium battery, and combines the divided container members into a sealed container, and one of the container members is synthesized. An object of the present invention is to provide an inspection method for inspecting whether or not a metal terminal is integrally formed with a resin container member in a predetermined manner in a metal terminal in which a metal terminal is integrally formed with a resin container member formed of a resin material. To do.

  According to the first aspect of the present invention, there is provided a method for inspecting a metal terminal for a sealed electrochemical device by combining divided container members into a sealed container, wherein one of the container members is a resin container member formed of a synthetic resin material. The metal terminal for a sealed electrochemical device in which the metal terminal is integrally formed with the synthetic resin material of the resin container member, and the rod body protruding from the surface of the metal terminal at the time of the integral molding is formed with the resin container member. It is integrally formed of the same synthetic resin material, and the base of the rod is broken by applying a load of stress that does not deform the metal terminal in the direction in which the rod is pushed down, and the base of the rod is broken. It is characterized by inspecting the bonding state in which the resin container member and the metal terminal are integrally formed by visual inspection of the remaining state of the synthetic resin material in which the resin material is broken. The method for inspecting a metal terminal for a sealed electrochemical device according to claim 2 is the method for inspecting a metal terminal for a sealed electrochemical device according to claim 1, wherein the metal terminal forms a pair of positive and negative electrodes. The metal terminals are integrally formed with the synthetic resin material of the resin container member, and the rod body is integrated with the same synthetic resin material as the resin container member on the surface of each metal terminal. The synthetic resin material of the base of the rod is broken by breaking the base of the rod by applying a stress load that does not deform the metal terminal in the direction in which the rod is pushed down. The appearance of the remaining state of the resin material is inspected to inspect the joined state in which the resin container member and the metal terminal are integrally formed.

  The method for inspecting a metal terminal for a sealed electrochemical device according to the present invention is a resin container member in which a divided container member is combined into a sealed container, and one of the container members is formed of a synthetic resin material, In a metal terminal for a sealed electrochemical device in which a terminal is formed integrally with the synthetic resin material of the resin container member, the rod body protruding from the surface of the metal terminal at the time of the integral molding has the same composition as the resin container member A synthetic resin material at the base of the rod body is formed integrally with a resin material, and the base portion of the rod body is broken by applying a load of stress that does not deform the metal terminal in a direction in which the rod body is pushed down. Since the appearance of the remaining state of the broken synthetic resin material is inspected, the actual bonding state between the resin container member and the metal terminal is tightly bonded as prescribed without damaging the metal terminal serving as the electrode terminal to be inspected. Can determine whether it has, moreover, it can be the rod is also know whether the inspection with the inspection jig that is provided in the metal terminal is performed. The metal terminals are a pair of metal terminals constituting positive and negative electrodes, and each metal terminal is formed integrally with the synthetic resin material of the resin container member, and the rod body is formed on the surface of each metal terminal. Since the resin container member is integrally formed of the same synthetic resin material, the pair of metal terminals of the same synthetic resin material are different from each other in the shape of the metal material or the shape thereof. Even if there is a difference in the adhesion at the part, the resin fracture surface of the base part can be observed for each rod body, and the bonding state between the positive electrode and the negative electrode of the metal terminal can be inspected. is there.

It is sectional drawing which shows the joining state of the metal terminal before test | inspecting in Embodiment 1 of this invention. It is the top view seen from the lower surface in the joining state of the metal terminal same as the above. It is sectional drawing of the joining state of the metal terminal which shows the non-defective product after test | inspecting in Embodiment 1 of this invention. It is the top view seen from the lower surface in the joining state of the metal terminal which shows the quality goods after test | inspecting same as the above. It is sectional drawing of the sealed electrochemical device of Embodiment 1 which comprised the metal terminal of the joining state of the metal terminal which shows a non-defective product same as the above. It is sectional drawing which shows the joining state of the metal terminal before test | inspecting in Embodiment 2 of this invention. It is sectional drawing which shows the joining state of the other metal terminal before test | inspecting in Embodiment 2 of this invention. It is sectional drawing of the joining state of the metal terminal which shows the non-defective product after test | inspecting in Embodiment 2 of this invention. It is sectional drawing of the joining state of the other metal terminal of the joining state of the metal terminal which shows the non-defective product after test | inspecting in Embodiment 2 of this invention. It is sectional drawing of the sealing type electrochemical device of Embodiment 2 which comprised the metal terminal of the joining state of the metal terminal which shows a non-defective product same as the above.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
The sealed electrochemical device of the present invention is a capacitor having an electrolytic solution, a lithium battery, or the like, and FIG. 5 is a cross-sectional view of the sealed electrochemical device having a metal terminal. The main body of this sealed electrochemical device is a sealed container in which divided container members are combined, and one of the container members is a disc (including an ellipse) or rectangular resin container member formed of a synthetic resin material. 2 has a metal terminal 1 formed integrally with the other, and the other container member is a bottomed cylindrical or rectangular solid metal material or synthetic resin material or a combination of a metal material and a synthetic resin material. The resin container member 2 and the container member 3 are a main body that becomes a sealed container when the resin container member 2 and the container member 3 are closed by a joining means 10a such as laser joining or ultrasonic welding joining. The resin container member 2 in the first embodiment shows a lid for closing the open end in combination with the bottomed container member 3 having an open end, but the resin container member 2 also has a bottomed cylinder with an open end. The shape made into a shape or a rectangular parallelepiped shape may be sufficient. The electrolytic solution 6, the electrode element portion 7, and the leads 8 and 9 are provided in an airtight state in the main body. The metal terminal 1 is a pair of metal terminals, and the lower end 1b of each is electrically connected to the electrode element portion 7 via the leads 8 and 9, and the positive and negative electrodes are configured so that each becomes a positive electrode terminal and a negative electrode terminal. Yes.

  Each of the pair of metal terminals has a round or square bar shape or a flat plate shape, such as copper (including its alloy), nickel surface-treated copper (including its alloy), aluminum (including its alloy), etc. The resin container member 2 is made of a synthetic resin material, which is one of the divided container members, and is integrally formed by injection molding or the like. As the synthetic resin material of the resin container member 2, polyethylene resin, polypropylene resin, polystyrene resin, polycarbonate resin, polyvinyl chloride resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate resin Examples include thermoplastic resins such as polybutylene naphthalate resin, fluorine resin, and polyether ether ketone resin, but thermosetting resins such as phenol resins may be used, and glass fibers and the like are contained. Also good.

  In addition, in the combination of the pair of metal terminals 1 and the resin container member 2, since the pair of metal terminals 1 is a combination having a different metal material or shape, there is a difference in bonding with the resin container member 2. It is preferable to perform a joint inspection on the metal terminal.

  Next, with reference to FIG. 1 to FIG. 4, a method for inspecting the bonding of metal terminals for sealed electrochemical devices will be described.

  1 and 2, when the pair of metal terminals 1 are integrally formed on the resin container member 2 made of a synthetic resin material as described above, the synthetic resin material of the resin container member 2 protrudes downward from the lower surface 2b. A columnar bar 4 is formed on the surface of the lower end 1b of each metal terminal 1. In addition, although the shape of the rod 4 illustrates a columnar shape, it may be a prismatic shape. Further, by projecting the rod body 4 from the lower surface 1b of the metal terminal 1, it can be arranged inside the main body of the sealed electrochemical device, so that it is not exposed to the outside of the main body and the appearance is good. However, since the rod 4 may be projected from the surface of the metal terminal 1, it may be projected from the surface opposite to the lower surface 1b, that is, the upper surface, or may be projected from both the upper and lower surfaces, that is, both surfaces. .

  Thus, since the rod body 4 is integrally formed of the same synthetic resin material as the resin container member 2 so as to protrude from the respective surfaces of the pair of metal terminals 1, the rod body 4 and the metal material of the metal terminal 1 are used. In other words, at the base portion 4a of the rod body 4 close to the joint interface, each base portion 4a is broken by receiving a load of stress that does not deform the metal terminal 1 in the direction P or Q in which the rod body 4 is pushed down. Thus, this breaking condition, that is, the state in which the synthetic resin material of the base portion 4a remains on the lower surface 1b of the metal terminal 1 is observed. In this case, the directions P and Q for pushing down to break the base 4a of the rod body 4 do not specify the arrow direction shown in FIG. 1, but may be the direction opposite to the arrow direction shown in FIG. The base 4a may be broken in any direction with a jig (not shown). The state in which the base portion 4a of the rod body 4 is broken and the synthetic resin material remains is a guideline for determining whether or not the metal terminal 1 and the resin container member 2 are in close contact with each other. At that time, even if the metal terminal 1 is flat, it can be inspected without being deformed or damaged.

  3 and FIG. 4, the synthetic resin material of the base portion 4 a is broken by receiving a predetermined load in the direction P or Q for pushing down the cylindrical rod body 4 described above, and the resin fracture surface 5 is formed on the lower surface 1 b of the metal terminal 1. Indicates the remaining state. If the synthetic resin material of the base portion 4a of the rod body 4 remains in the resin fracture surface 5 with a circular contour shape, the metal terminal 1 and the resin container member 2 are well bonded, that is, a metal exhibiting a good product. The terminal bonding state is shown. In this case, even if the synthetic resin material of the base portion 4a of the rod 4 is not 100% remaining, the state in which the circular outline shape is missing and the synthetic resin material remains 80% or more is referred to as the metal terminal 1. The remaining ratio of the synthetic resin material may be specified on the assumption that the bonding with the resin container member 2 is good. Upon receiving a predetermined load in the direction P or Q in which the rod body 4 is pushed down, the base portion 4a of the rod body 4 is broken, and the resin fracture surface 5 lacks a circular contour, so that the metal material on the surface of the metal terminal 1 is removed. If the synthetic resin material remaining rate that is partially or entirely exposed is low (not shown), the bonding between the metal terminal 1 and the resin container member 2 is poor.

  As described above, an appearance inspection is performed to observe the resin fracture surface 5 of the base portion 4a of the rod body 4 as to whether or not the metal terminal 1 and the resin container member 2 are molded so as to have predetermined adhesion. The rod body 4 serves as an inspection jig, and the presence or absence of the inspection whether or not the inspection has been performed can be grasped based on whether or not the base 4a of the rod body 4 is broken. Even if the rod 4 is protruded from the lower surface 1b of the metal terminal 1 and the resin fracture surface 5 remains on the lower surface 1b of the metal terminal 1, as shown in FIG. Since it does not protrude outside, it does not adversely affect the appearance as a sealed electrochemical device.

  Regarding the setting of a predetermined load received in the direction P or Q in which the rod body 4 is pushed down, a stress is applied to the joining interface between the lower surface 1b of the metal terminal 1 and the rod body 4, and the rod body 4 which is a portion close to the joining interface. Since the synthetic resin material of the base portion 4a is broken, the stress that does not deform the metal terminal 1, the joining force between the metal terminal 1 and the resin container member 2, the breaking force of the base portion 4a of the rod body 4 and the like are taken into consideration. What is necessary is just to set suitably by the material of the metal terminal 1 and the resin container member 2, and the cross-sectional area and shape of the rod 4. Although not shown, since the material of the rod body 4 is the same as the synthetic resin material of the resin container member 2, if the synthetic resin material is difficult to break, grinding is performed after the rod body 4 is molded. It is preferable to make the base portion 4a easy to break by forming the base portion 4a thinly toward the lower surface or providing a cut in the base portion 4a.

  In addition, regarding the determination of a non-defective product or a defective product in the appearance inspection of the resin fracture surface 5, first, a resin container member with a metal terminal in which a joint portion between the metal terminal 1 and the resin container member 2 satisfies a predetermined tight junction. As a standard, the shape of the resin fracture surface 5 obtained by observing, for example, by imaging the resin fracture surface 5 of the base 4a of the rod 4 or the residual ratio of the synthetic resin material is used as a reference index. Next, the shape of the resin fracture surface 5 obtained by observing the resin fracture surface 5 of the base portion 4a of the rod body 4 at the joint portion between the metal terminal 1 to be inspected and the resin container member 2 in the same manner. Alternatively, the data of the residual ratio of the synthetic resin material may be compared with the cross-sectional shape of the reference index or the residual ratio of the synthetic resin material to determine whether the bonded product is good or defective.

  As described above, the pair of metal terminals 1 constituting the positive and negative electrodes are formed integrally with the synthetic resin material of the resin container member 2, and 4 is formed on the surface of each metal terminal 1 with the same synthetic resin as the resin container member 1. Since it is integrally molded with the material, even if it is the same synthetic resin material, the pair of metal terminals 1 are different from each other in the metal material or the shape, so that there is a difference in the adhesion at the joint portion. Even if it exists, the resin fracture surface 5 of the base 4a can be observed about each rod 4, and the joining state about the positive electrode and negative electrode of the metal terminal 1 can be inspected.

(Embodiment 2)
The sealed electrochemical device of the present invention is a capacitor having an electrolytic solution, a lithium battery, or the like, and FIG. 10 is a cross-sectional view of the sealed electrochemical device having a metal terminal. The main body of the sealed electrochemical device is composed of resin container members 12 and 13 made of a synthetic resin material having a bottomed cylindrical or rectangular parallelepiped shape with an open end, and the resin container member 12 and 13 is combined so that the opening end is closed, and a sealed container is formed by laser bonding or ultrasonic welding. As shown in FIGS. 6 and 7, the resin fat container members 12 and 13 constituting the hermetic container are internally formed with spaces in the spaces 12a and 13a, and the metal terminals 11 and 21 are integrally formed. It is molded into. One end of each of the metal terminals 11 and 21 serves as leads 18 and 19 in the space in the sealed container, and is electrically connected to the electrode element portion 17 and provided in an airtight state together with the electrolytic solution 16. The metal terminals 11 and 21 are electrically connected to the electrode element portion 17 through the lead 18 and the lead 19, and the positive and negative electrodes are configured so as to be a positive electrode terminal and a negative electrode terminal, respectively.

  The metal terminals 11 and 21 are each flat or rod-shaped and made of a metal material such as copper (including its alloy), surface-treated copper (including its alloy), and aluminum (including its alloy). The resin container members 12 and 13 formed of a synthetic resin material are integrally formed by injection molding or the like. Synthetic resin materials for the resin container members 12 and 13 include polyethylene resin, polypropylene resin, polystyrene resin, polycarbonate resin, polyvinyl chloride resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate. Examples include thermoplastic resins such as resin, polybutylene naphthalate resin, fluorine resin, and polyetheretherketone resin, but thermosetting resins such as phenol resins may be used, and glass fibers may be included. It may be.

  Next, with reference to FIGS. 6 to 9, a method for inspecting the bonding of the metal terminal for the sealed electrochemical device will be described.

  FIG. 6 shows one container member (resin container member) constituting the sealed container. This resin container member 12 is a bottomed cylindrical or rectangular parallelepiped box made of the above-mentioned synthetic resin material having a space 12a, and the metal terminal 11 made of the above-mentioned metal material resinizes the lead 18 at one end thereof. The metal terminal 11 is integrally formed of the synthetic resin material of the resin container member 12 by injection molding or the like so as to be formed on the inner wall surface of the space portion 12a of the container member 12. At the time of the integral molding, a cylindrical or prismatic rod body 14 is formed on the upper surface of the other end of the metal terminal 11 integrally with the same synthetic resin material as the resin container member 12. In addition, since the rod body 14 should just protrude from the surface of the metal terminal 11, you may protrude from a lower surface, and you may protrude from both an upper surface and a lower surface, ie, both surfaces.

  FIG. 7 shows the other container member (resin container member) constituting the sealed container. The resin container member 13 is a bottomed cylindrical or cuboid box made of the same synthetic resin material as the resin container member 12 having the space 13a, and a metal terminal made of the same metal material as the metal terminal 11. The metal terminal 21 is integrally formed by injection molding or the like with the synthetic resin material of the resin container member 13 so that 21 forms the lead 19 at one end thereof on the inner wall surface of the space 13 a of the resin container member 13. At the time of the integral molding, a cylindrical or prismatic rod body 24 is formed on the upper surface of the other end of the metal terminal 21 integrally with the same synthetic resin material as the resin container member 13. In addition, since the rod body 24 should just protrude from the surface of the metal terminal 21, you may protrude from a lower surface, and you may make it protrude in both an upper surface and a lower surface, ie, both surfaces. Further, the metal material of the metal terminal 21 and the synthetic resin material of the resin container member 13 may not be the same material as the metal material of the metal terminal 11 and the synthetic resin material of the resin container member 13, respectively.

  FIGS. 8 and 9 show that when a predetermined load is applied in the directions R and S for pushing down the rods 14 and 24, the synthetic resin material of the base portions 14a and 24a breaks and the resin terminals are broken on the surfaces of the metal terminals 11 and 21, respectively. The state where the cross sections 15 and 25 remain is shown. Thus, if the synthetic resin material of each base part 14a and 24a of the rods 14 and 24 remains, joining of the metal terminal 11 and the resin container member 12 and joining of the metal terminal 21 and the resin container member 13 will be carried out. It shows the bonding state of the metal terminal indicating that it is good, that is, a good product. In this case, even if the synthetic resin material of the base portions 14a and 24a of the rods 14 and 24 is not 100%, the outline shape of the fracture surface is missing and the synthetic resin material remains 80% or more. Assuming that the metal terminals 11 and 21 and the resin container members 12 and 13 are well bonded, the remaining ratio of the synthetic resin material may be specified. The bases 14a and 24a of the rods 14 and 24 are broken by receiving a predetermined load in the directions R and S in which the rods 14 and 24 are pushed down, and the contour shapes of the respective resin fracture surfaces 15 and 25 are missing, thereby causing a metal terminal If the remaining ratio of the synthetic resin material in which the metal materials on the surfaces of 11 and 21 are partly or entirely exposed is low (not shown), the metal terminals 11 and 21 and the resin container members 12 and 13 are joined. It is bad.

  As described above, whether or not the metal terminals 11 and 21 and the resin container members 12 and 13 are molded so as to have predetermined adhesion is determined by the resin breakage of the base portions 14a and 24a of the rod bodies 14 and 24, respectively. Since the appearance inspection for observing the cross sections 15 and 25 is performed, the rod bodies 14 and 24 serve as inspection jigs, and whether or not the inspection is performed depending on whether or not the base portions 14a and 24a of the rod bodies 14 and 24 are broken. It is possible to know whether or not an inspection is conducted.

  Regarding the setting of the predetermined load received in the directions R and S in which the rods 14 and 24 are respectively pushed down, stress is applied to the bonding interface between the surfaces of the metal terminals 11 and 21 and the rods 14 and 24 to be close to the bonding interface. Since the synthetic resin material of the base portions 14a and 24a of the rod bodies 14 and 24, which are the parts, is broken, the stress that does not deform the metal terminals 11 and 21, and the metal terminals 11 and 21 and the resin container members 12 and 13 Considering the joining force and the breaking force of the base portions 14a and 24a of the rod bodies 14 and 24, the material of the metal terminals 11 and 21, the material of the resin container members 12 and 13, and the rod bodies 14 and 24 are broken. What is necessary is just to set suitably according to an area or a shape. Although not shown, since the material of the rod bodies 14 and 24 is the same as the synthetic resin material of the resin container members 12 and 13, in the case where the synthetic resin material is difficult to break, the rod bodies 14 and 24 It is preferable that each of the base portions 14a and 24a is easily ruptured by grinding each of the base portions 14a and 24a after molding, or by forming a cut in each of the base portions 14a and 24a.

  In addition, regarding the determination of the non-defective product / defective product in the appearance inspection of the resin fracture surfaces 15 and 25, first, the joint portion between the metal terminals 11 and 21 and the resin container members 12 and 13 is in a joint state satisfying a predetermined tight joint. The shape of the resin fracture surfaces 15 and 25 obtained by observing, for example, by imaging the resin fracture surfaces 15 and 25 of the base portions 14a and 24a of the rod bodies 14 and 24 with the resin container member with a metal terminal as a standard, or The residual rate of the synthetic resin material is used as a reference index. Next, the resin fracture surfaces 15 and 25 of the base portions 14a and 24a of the rod bodies 14 and 24 at the joints between the metal terminals 11 and 21 to be inspected and the resin container members 12 and 13 are similarly imaged. By comparing the obtained data of the resin fracture surfaces 15 and 25 or the data of the residual ratio of the synthetic resin material with the cross-sectional shape of the reference index or the residual ratio of the synthetic resin material, it is possible to determine whether the bonded state is good or defective. Good.

  The inspection method of the present invention is a sealed electrochemical device such as a capacitor having an electrolytic solution or a lithium battery, and a metal terminal (for example, a metal electrode terminal) is attached to a container member (resin container member) made of a synthetic resin material. This is useful for inspecting the joining state of the integrally formed connecting portion.

1 Metal terminal 2 Resin container member (one of the container members)
3 Container members (other container members)
4 Rod body 5, 15, 25 Resin fracture surface 11, 21 Metal terminal 12, 13 Resin container member (container member)
14, 24 Rod

Claims (2)

  A sealed container in which the divided container members are combined to form a sealed container, and one of the container members is a resin container member formed of a synthetic resin material, and a metal terminal is formed integrally with the synthetic resin material of the resin container member. In the metal terminal for electrochemical devices, the rod protruding from the surface of the metal terminal during the integral molding is integrally molded with the same synthetic resin material as the resin container member, and the rod is pushed down The base of the rod is broken by applying a stress load that does not deform the metal terminal, and the appearance of the remaining state of the synthetic resin material in which the synthetic resin material of the base of the rod is broken is inspected. A joint inspection method for metal terminals for sealed electrochemical devices, wherein a joint state in which a container member and a metal terminal are integrally formed is inspected.   The metal terminals are a pair of metal terminals constituting positive and negative electrodes, and each metal terminal is formed integrally with the synthetic resin material of the resin container member, and the rod body is formed on the surface of each metal terminal. It is integrally formed of the same synthetic resin material as the container member, and the base of the rod is broken by applying a load of stress that does not deform the metal terminal in a direction in which the rod is pushed down. 2. The hermetic seal according to claim 1, wherein the joint state in which the resin container member and the metal terminal are integrally formed is inspected by inspecting the appearance of the remaining state of the synthetic resin material in which the synthetic resin material at the base is broken. Inspection method for metal terminals for type electrochemical devices.

Images