WO2006046585A1

WO2006046585A1 - Coupling device, storing case and method for manufacturing electric device assembly

Info

Publication number: WO2006046585A1
Application number: PCT/JP2005/019659
Authority: WO
Inventors: Toshizo Hosoya
Original assignee: Nec Corporation; Fuji Jukogyo Kabushiki Kaisha
Priority date: 2004-10-29
Filing date: 2005-10-26
Publication date: 2006-05-04
Also published as: JP5010283B2; JPWO2006046585A1

Abstract

A coupling device (100) for electrically coupling electrode terminals (3, 4) of a film covered battery (1) is provided with a sandwiching member (20) having a first member (21) and a second member (22), and a pressing member (30). The pressing member (30) presses the electrode terminal (3) for a positive electrode and the electrode terminal (4) for a negative electrode in the film covered battery (1) in a direction where the terminals are permitted to press-contact with each other. The terminals are sandwiched by sandwiching planes (21a, 22a) of the sandwiching member (20) by being overlapped with each other.

Description

Manufacturing method of joining apparatus, storage case, and electric device assembly

TECHNICAL FIELD [0001] The present invention relates to a joining apparatus, a housing case, and an electrical device assembly manufacturing method for joining together terminals of an electrical device using a thin metal plate joined body as a lead terminal.

Background art

In recent years, the development of electric vehicles and hybrid electric vehicles (hereinafter simply referred to as “electric vehicles and the like”) equipped with a battery for driving a motor is being rapidly advanced. Naturally, batteries mounted on electric vehicles and the like are required to be light in weight in order to improve maneuverability and mileage for one charge. In order to reduce the weight of the battery, there is a film-covered battery using a laminate material in which a metal layer such as aluminum and a heat-welded resin layer are overlapped with an adhesive layer to form a thin film. Has been developed. In general, a laminate material has a structure in which both surfaces of a thin metal layer such as aluminum are covered with a thin resin layer, which is resistant to acids and alkalis, and is lightweight and flexible.

In order to drive an electric vehicle or the like with a battery, it is necessary to form an assembled battery formed by connecting a plurality of batteries. Conventionally, as shown in Fig. 1, a battery terminal is connected to one battery terminal and another battery terminal using bolts and nuts, or by welding, welding, or the like. In general, a method of joining by the above method has been adopted.

[0004] Fig. 1 (a) and Fig. 1 (b) show a method of electrical connection by fastening electrode terminals together. FIG. 1 (a) shows a method of mechanically fastening the electrode terminals 201 with bolts 203 and nuts 204. FIG. That is, in the method shown in FIG. 1A, the electrode terminal 201 extending from one film-covered battery 200 is overlapped with the electrode terminal 201 of another film-covered battery 200, and this overlapped portion is Further, after being pinched by the pinch plate 202, the bolt 203 and the nut 204 are fastened. On the other hand, (b) of FIG. 1 shows an example in which the electrode terminals 201 that are overlapped are joined together by welding 205.

In addition to the method of overlapping electrode terminals 201 as shown in FIGS. 1 and 2 (b), FIG. As shown in (a), the electrode terminals 201 may face each other, and the facing portions may be joined by fastening with bolts and nuts, welding, or the like.

In addition, in order to take out the assembled battery power voltage configured as described above, a harness 206 with a terminal is joined to the electrode terminal 201 as shown in FIG. The terminal-equipped harness 206 shown in FIG. 3 is fastened to the electrode terminal 201 with bolts and nuts.

[0007] When the electrode terminals are joined to each other with bolts and nuts while being pressed, the number of parts is increased, and time and labor are required for joining. Similarly, time and labor are required for welding. Further, in the case of the above-described configuration, it is necessary to attach a terminal for taking out the voltage to the electrode terminal as a separate work not related to the joining of the electrode terminals.

[0008] Japanese Unexamined Patent Application Publication No. 2004-55348 discloses an assembled battery in which electrode terminals are fixed by a fixing device. In the fixing device, an arrow-shaped engaging member, a cushioning material, and an opening are arranged on a planar fixed base portion. In this fixing device, the engaging member is inserted into the opening when the fixed base portion is bent around the shaft. Then, the terminals of the two thin batteries stacked so that the positive terminal of one thin battery and the positive terminal of another thin battery are in the same direction are sandwiched by the cushioning material arranged opposite to each other. . Further, by engaging the engaging member with the opening, the thin battery is fixed inside the assembled battery by the fixing device. The assembled battery disclosed in Japanese Patent Application Laid-Open No. 2004-55348 has a configuration in which the labor required for joining is reduced compared to joining with bolts and nuts, and the battery can be easily detached from the assembled battery. The

Disclosure of the invention

Problems to be solved by the invention

However, in the configuration disclosed in Japanese Patent Application Laid-Open No. 2004-55348, the number of parts constituting the fixing device is large, so that it takes time to prepare the fixing device. Further, although the labor required for joining can be reduced compared to joining with bolts and nuts, a process of bending the fixed base 51 around the shaft 51a and engaging the engaging member 52 with the opening 54 is required. These lead to an increase in manufacturing cost.

[0010] The present invention has been made in view of the above-described problems, and includes a joining device and a storage case that are configured with a small number of parts and that enable easy and reliable electrical joining of electrode terminals. And a method of manufacturing an electrical device assembly.

Means for solving the problem

[0011] The joining apparatus of the present invention has an electrode terminal of one electrical device and an electrode terminal of another electrical device in addition to the joining apparatus that electrically joins the electrode terminals of the electrical device from which the electrode terminals extend. And a pressing member that presses the electrode terminals that are clamped by the clamping surface in a direction in which they are pressed against each other.

[0012] According to the configuration of the present invention, the electrode terminals can be electrically joined only by the sandwiching member and the pressing member. In the joining device of the present invention, the electrode terminals are overlapped and joined by the sandwiching member, and further pressed by the pressing member in the direction in which the electrode terminals are pressed against each other. Can be done.

[0013] Further, in the joining device of the present invention, the holding member has an outer peripheral surface along which the electrode terminal is disposed and a pair of members formed with the holding surface, and the pressing member is the first portion. And two second portions that are connected to the first portion and face each other and press each clamping member from the outer peripheral surface force on the opposite side of the clamping surface. The shape of the pressing member by the first part and the second part may be a simple shape such as a rectangular shape. In this way, by making the shape of the pressing member rectangular, it is possible to easily configure the pressing member that generates a force for pressing the electrode terminals held by the holding surfaces in a direction in which they are pressed against each other. Moreover, the electrode terminal along the outer peripheral surface of the clamping member is pressed against the clamping member by the pressing member. As a result, the electrode terminals can be fixed more reliably by being clamped by the clamping member and the pressing member in addition to being clamped by the clamping surface of the clamping member.

[0014] Further, the sandwiching member of the joining device of the present invention may have a shape in which the sandwiching surface of one member and the sandwiching surface of the other member mesh complementarily. As a result, it is difficult for the electrode terminals sandwiched between the sandwiching surfaces to lose the sandwiching surface force, and the contact area between the electrode terminals can be increased.

In the joining device of the present invention, each member of the clamping member has a groove on each opposite surface of each clamping surface, and the pressing member engages with the groove at the end of the second portion. It has a joint Tetsugo. When the engaging portion of the pressing member is engaged with the groove of the holding member, the pressing member and the holding member are reliably engaged. As a result, the joining of the electrode terminals held between the holding members is also ensured.

[0016] In the joining device of the present invention, the engaging portion may have a hollow shape. When the engaging portion is hollow, the engaging portion of the pressing member is engaged with the groove of the holding member. For example, the pressing member is opened by inserting a rod-like member into the hollow portion. It is possible to adopt a method of engaging afterwards. This facilitates assembly of the joining device.

[0017] Further, the joining device of the present invention is an inclined surface that forms a recess by arranging each member to face each other on the side where each electrode terminal is inserted, which is a clamping surface with each member of the clamping member. The pressing member may have a convex portion at a portion corresponding to the concave portion.

[0018] Further, the joining device of the present invention may be one in which through holes are formed on both sides of the convex portion, or one that is curved so as to be convex in the direction in which the convex portion protrudes. Further, the pressing member may be a coasting member. In this case, the convex portion of the pressing member can be aligned with the concave portion of the clamping member, and the pressing member can be screwed to the clamping member with, for example, a screw using the through hole. By this screwing, the pressing member that is elastic and curved is attached along the attachment surface of the clamping member. If it does so, the convex part of a pressing member will be strongly pressed with respect to a recessed part. Thus, the electrode terminal can be strongly sandwiched between the convex portion of the pressing member and the concave portion of the clamping member.

[0019] Further, the pressing member of the joining device of the present invention may have a voltage extracting portion for extracting a voltage to the outside, and is further fixed to the clamping member at the voltage extracting portion. It can be a thing.

[0020] The storage case of the present invention is a storage for storing a plurality of electrical devices with electrode terminals extending.

The electrode member of one electrical device and the electrode terminal of another electrical device are overlapped and sandwiched by a sandwiching surface, and the sandwiching member has a wall surface constituting the storage case.

[0021] Since the storage case of the present invention has a clamping member on the wall surface, for example, the clamping member is on the wall surface. When provided integrally, the number of parts can be reduced.

[0022] In addition, the holding member of the storage case of the present invention may have an outer peripheral surface along which the electrode terminal is arranged and a holding surface, and a pair of members. The sandwiching surface of the member and the sandwiching surface of the other member may be in a complementary shape, and each member of the sandwiching member has a groove on each opposite surface of the sandwiching surface. May be.

[0023] Further, the method for manufacturing an electrical device assembly of the present invention is a method for manufacturing an electrical device assembly configured by electrically joining electrode terminals of an electrical device in which the electrode terminals extend. The process of preparing a clamping member that overlaps the electrode terminal of one electrical device with the electrode terminal of another electrical device and clamps it on the clamping surface, and is clamped on the clamping surface! A step of preparing a pressing member that presses each electrode terminal in a direction in which the electrode terminals are pressed against each other, and the electrode terminal of one electric device and the electrode terminal of another electric device are overlapped on the holding surface and held by the force pressing member And pressing the electrode terminals sandwiched between the members in the direction in which they are pressed against each other.

[0024] The method for producing an electrical device assembly of the present invention uses a sandwiching member and a pressing member, and the electrode terminals are simply brought into pressure contact with each other by pressing and overlapping the electrode terminals on the sandwiching surface of the sandwiching member. Can be electrically joined. Therefore, when an assembled battery using a storage battery such as a film-clad battery or a plurality of connected capacitors is manufactured as an electrical device, the manufacturing process can be simplified.

The invention's effect

[0025] According to the present invention, it is possible to easily and reliably perform the electrical joining of the electrode terminals with a small number of parts using only the sandwiching member and the pressing member.

Brief Description of Drawings

FIG. 1 is a diagram showing an example of a conventional joining method for electrode terminals in a film-clad battery.

FIG. 2 is a diagram showing another example of a conventional joining method for electrode terminals in a film-clad battery.

FIG. 3 is a diagram showing an example of a conventional voltage extraction method for electrode terminals in a film-clad battery. FIG. 4 is an external perspective view of a film-clad battery applicable to the present invention.

FIG. 5 is a partially enlarged view of the terminal joint portion of the first embodiment of the present invention when the film-clad batteries shown in FIG. 4 are connected in series.

FIG. 6 is an exploded perspective view of a joint portion.

FIG. 7 is a diagram for explaining attachment of a connector using a mounting jig.

FIG. 8 is a schematic view showing an example in which the terminal junction of the first embodiment of the present invention is applied to an assembled battery.

FIG. 9 is an exploded perspective view of a terminal joint portion according to a second embodiment of the present invention.

FIG. 10 is a cross-sectional view of a connector according to a second embodiment of the present invention, (a) is a cross-sectional view taken along line AA shown in FIG. 9, and (b) is a state where an output terminal is attached. FIG. 10 is a cross-sectional view taken along line BB shown in FIG.

FIG. 11 is a side sectional view of a connector according to a second embodiment of the present invention.

FIG. 12 is an example using the connector and the joining device of the second embodiment of the present invention, (a) is an example of series connection, and (b) is an example of parallel connection using four film-clad batteries. It is. BEST MODE FOR CARRYING OUT THE INVENTION

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

[0028] (First embodiment)

FIG. 4 shows an external perspective view of the film-clad battery of this embodiment.

[0029] The film-clad battery 1 of the present embodiment includes a power generation element 2 having a positive electrode side active electrode, a negative electrode side active electrode, and an electrolyte solution (not shown), a metal film such as aluminum, and a heat-fusible resin. It has a structure in which a laminated film 7 formed by superimposing the film is heat-sealed on the four sides of the heat-sealing portion 7a and sealed.

[0030] The power generating element 2 of the film-clad battery 1 may be a laminated type composed of a positive electrode side active electrode and a negative electrode side active electrode laminated via a separator (not shown), or may be a belt-like positive electrode side. It is a wound type with a structure in which the positive electrode side active electrode and the negative electrode side active electrode are alternately laminated by stacking the active electrode and the negative electrode side active electrode through a separator and then compressing it in a flat shape. There may be.

[0031] Further, as the power generation element 2, if it includes a positive electrode, a negative electrode and an electrolyte, Any power generating element used for the battery is applicable. A power generation element in a general lithium ion secondary battery is composed of a positive electrode plate coated with a positive electrode active material such as lithium manganese oxide and lithium cobaltate on both sides of an aluminum foil and the like, and doped with lithium. It is formed by facing a negative electrode plate, such as a copper foil, coated on both sides, such as a copper foil, through a separator, and impregnating it with an electrolyte containing a lithium salt. Examples of the power generation element 2 include power generation elements of other types of chemical batteries such as a nickel metal hydride battery, a nickel cadmium battery, a lithium metal primary battery or a secondary battery, and a lithium polymer battery. Furthermore, the present invention relates to an electric device capable of accumulating electric energy inside and generating gas by a chemical reaction or a physical reaction, such as a capacitor element exemplified by a capacitor such as an electric double layer capacitor or an electrolytic capacitor. It can also be applied to electrical devices in which the elements are sealed with an exterior film.

[0032] From the heat-sealed portion 7a in the short direction of the film-clad battery 1, the positive electrode terminal 3 connected to the positive electrode and the negative electrode terminal 4 connected to the negative electrode are opposed to each other. It is extended. Aluminum is often used as the positive electrode terminal 3, and copper or nickel is often used as the negative electrode terminal 4 due to its electrical characteristics.

Next, FIG. 5 shows an enlarged view of a part of the terminal joint when the film-clad batteries shown in FIG. 4 are connected in series, and FIG. 6 shows an exploded perspective view of the joint.

[0034] Each film-clad battery 1 is housed in a cell case 10, and a positive electrode terminal 3 and a negative electrode terminal 4 extend from the opening 10a to the outside. A joining device 100 used for electrical joining of the positive electrode terminal 3 and the negative electrode terminal 4 includes a sandwiching member 20 and a pressing member 30. As shown in FIG. 6, the positive electrode terminal 3 and the negative electrode terminal 4 are bent along the outer peripheral surface of the clamping member 20 disposed on the cell case 10, and are sandwiched between the clamping surfaces 21a and 22a of the clamping member 20. In this state, the pressing member 30 is fixed on the upper part of the holding member 20 in this state.

The sandwiching member 20 includes a first member 21 and a second member 22, and sandwiches the positive electrode terminal 3 and the negative electrode terminal 4 between the sandwiching surfaces 21a and 22a. The sandwiching surfaces 21a and 22a are wavy shapes and meshes that mesh with each other in order to prevent the sandwiched electrode terminals from coming off. In other words, it has a complementary shape. In this embodiment, the shape of the sandwiching surfaces 21a and 22a is such that each electrode terminal is removed from the sandwiching surfaces 21a and 22a, and the pressure contact force to the overlapping positive electrode terminal 3 and negative electrode terminal 4 is reduced. In order to avoid excessive concentration, a gentle wave shape as shown in Fig. 5 and Fig. 6 is used. However, the shape of the clamping surfaces 2 la and 22a is not limited to such a shape, for example, it may be a triangular wave shape or a rectangular wave shape.

[0036] Further, a semicircular shape in which an engaging portion 30a of a pressing member 30 to be described later is hooked on the side surface 20b of the first member 21 and the second member 22 opposite to the sandwiching surfaces 21a and 22a. The engaging grooves 23 are respectively formed. The engagement groove 23 is not limited to a semicircular shape, and may be a rectangle or the like for preventing the engagement portion 30a from coming off. Each engaging groove 23 is formed at the same height in both the first member 21 and the second member 22 so that the pressing force by the engaging portion 30a is equally applied to the clamping surfaces 21a and 22a. The same shape is preferable. Note that the length of the positive electrode terminal 3 extending from the opening 10a is longer than the circumferential length formed by the side surface 20b, the engagement groove 23, and the clamping surface 22a of the second member 22, and for the positive electrode. The electrode terminal 3 needs to be long enough to be folded into the clamping surface 22a. The relationship between the negative electrode terminal 4 and the first member 21 is also the same.

[0037] In addition, the clamping member 20 is a force showing an example in which the first member 21 and the second member 22 are completely separated from each other. They may be joined together and integrated. In this case, in order to achieve good electrical bonding of the electrode terminals, it is preferable that the bonding portion has elasticity and the gap formed by the clamping surfaces 21a and 22a should be sufficiently narrow. Such a configuration reduces the number of parts.

[0038] The pressing member 30 securely fixes and joins the positive electrode terminal 3 and the negative electrode terminal 4 by further sandwiching the clamping member 20 sandwiching the positive electrode terminal 3 and the negative electrode terminal 4 from both sides. Is to do. The pressing member 30 is a thin plate having elasticity that is bent into a U-shape including an upper surface 30b and two side surfaces 30c connected to the upper surface 30b. The material of the pressing member 30 may be a thin metal plate as long as it has elasticity, or may be made of an insulating resin in consideration of the insulation of the electrode terminal with respect to the outside. [0039] Engaging portions 30a for bowing the engaging grooves 23 of the holding member 20 are formed at the end portions near the four corners of the side surface 30c. The pressing member 30 is attached to the holding member 20 by being inserted from the upper surface 20 a side of the holding member 20. For this reason, the engaging portion 30a needs to be easily removed when it easily slides on the side surface 20b of the holding member 20 and is caught in the engaging groove 23. Therefore, the shape of the engaging portion 30a is formed in a cylindrical shape. Further, as shown in FIG. 5, the engaging portion 30a may be formed by a roll bending carriage having a hollow cylindrical shape, or may be a solid cylindrical shape. It should be noted that the concealment between the opposing engaging portions 30a (for example, 30a and 30a shown in FIG. 5) increases the pressing force to secure the electrode terminal more securely.

1 2

Therefore, it is formed slightly narrower than the interval L (see FIG. 6) of the engaging groove 23 with the electrode terminal sandwiched therebetween. The engaging portion 30a may be omitted.

[0040] Further, the upper surface 30b of the pressing member 30 is bent and curved so as to be convex with respect to the upper surface 20a of the clamping member 20 in a state of being attached to the clamping member 20! May be! / Thus, the upper surfaces 4a and 4b of the positive electrode terminal 3 and the negative electrode terminal 4 can be pressed against the upper surface 20a of the holding member 20, and the electrode terminals can be fixed more reliably.

Next, an electrical connection method of the positive electrode terminal 3 and the negative electrode terminal 4 by the sandwiching member 20 and the pressing member 30 will be described.

[0042] First, the positive electrode terminal 3 and the negative electrode terminal 4 are extended from the opening 10a of the cell case 10. Next, a sandwiching member 20 including a first member 21 and a second member 22 is disposed between the positive electrode terminal 3 and the negative electrode terminal 4. The sandwiching member 20 is disposed on the wall surface of the cell case 10 so that each engagement groove 23 of the sandwiching member 20 faces the positive electrode terminal 3 and the negative electrode terminal 4 side.

In this state, the positive electrode terminal 3 is bent along the outer peripheral surface of the second member 22. Similarly, the negative electrode terminal 4 is also bent with the first member 21 along the outer peripheral surface. Next, the surface 3b, 4b of each electrode terminal is sandwiched between the clamping surfaces 21a, 22a. Next, both side forces of the clamping member 20 are pressed down so that the surfaces 3b and 4b of the electrode terminal follow the curved surfaces of the clamping surfaces 21a and 22a.

Next, as shown in FIG. 7, the pressing member 30 is opened with the mounting jig 50 (in the direction of arrow A in the figure), and the pressing member 30 is put on the clamping member 20. The mounting jig 50 is engaged with the tip. An insertion portion 50a that can be inserted into the hole of the portion 30a is provided. The mounting jig 50 is rotated in a direction (arrow A direction in the figure) in which the insertion portion 50a is opened by rotating the upper part of the mounting jig 50 in a direction (arrow B direction in the figure).

[0045] The mounting method of the pressing member 30 to the clamping member 20 by the mounting jig 50 is as follows.

First, the insertion part 50a of the mounting jig 50 is inserted into the hole of the engagement part 30a. Next, the pressing member 30 is opened by rotating the upper portion of the mounting jig 50 in the closing direction. The pressing member 30 is put on the holding member 20 in a state where the pressing member 30 is expanded. Next, the engaging portion 30 a of the pressing member 30 is aligned with the engaging groove 23 of the holding member 20. After the alignment, the upper portion of the mounting jig 50 is rotated in the opening direction to close the pressing member 30, thereby engaging the engaging portion 30 a with the engaging groove 23. Finally, the insertion of the pressing member 30 to the holding member 20 is completed by removing the insertion portion 50a from the hole of the engaging portion 30a. The pressing member 30 may be mounted without using the mounting jig 50! /.

As described above, the positive electrode terminal 3 and the negative electrode terminal 4 are sandwiched between the clamping surfaces 21a and 22a of the clamping member 20, so that the positive electrode terminal 3 and the negative electrode terminal 4 can be reliably connected. A spiritual connection is made.

[0048] When a plurality of film-clad batteries 1 are connected to form an assembled battery, the assembled battery 60 shown in FIG. 8 can be obtained by repeating the above-described procedure.

[0049] (Second Embodiment)

FIG. 9 shows an exploded perspective view of the terminal joint portion of the present embodiment. Fig. 10 (a) shows a cross-sectional view of the connector of this embodiment taken along line A-A shown in Fig. 9, and Fig. 10 (b) shows Fig. 7 with the output terminal attached. Sectional views taken along the line BB are shown. FIG. 11 shows a side sectional view of the connector of this embodiment.

[0050] The pressing member 130 of the present embodiment has a convex portion 132 for pressing the electrode terminal on its upper surface 130b. In addition, terminal holes 131 are formed at both ends of the convex portion 132 to which output terminals for taking out a voltage from the film-clad battery can be joined. Further, as shown in FIG. 11, the upper surface 130b of the pressing member 130 is formed to be curved so that the convex portion 132 protrudes outside the arc. That is, the pressing member 130 has a convex portion 132 that is convex. So that it protrudes and curves. An engaging portion 130a is formed on a side surface 130c for fixing the pressing member 130 of the present embodiment with the holding member 120 interposed therebetween. In the first embodiment, an example in which the engaging portion is formed in the inner winding is shown. However, in the present embodiment, an example in which the engaging portion is formed in the outer winding is shown.

[0051] In addition, the clamping member 120 is also composed of two members, a first member 121 and a second member 122, as in the first embodiment, and a film exterior is formed at the joint surfaces 121a and 122a of both members. The positive electrode terminal 3 and the negative electrode terminal 4 of the battery 1 are sandwiched. In this embodiment, the first member 121 and the second member 122 are symmetrical, and the joining surfaces 121a and 122a are not wave shapes but flat surfaces. In addition, the first member 121 and the second member 122 are formed with half-hole portions 121c and 122c that serve as holes through which screws 150 for fixing the output terminals are passed, respectively. Further, in the first member 121 and the second member 122, half hole portions 121e and 122e for forming a hole for disposing the nut 151 to be engaged with the screw 150 correspond to the terminal hole 131 of the pressing member 130. Formed in position!

[0052] In addition, the first member 121 and the second member 122 are formed with inclined surfaces 121d and 122d, respectively, for forming a recess 140 at a portion corresponding to the protrusion 132 of the pressing member 130. Since the engaging portion 130a of the pressing member 130 of the present embodiment has an outer winding shape as described above, the first member 121 and the second member 122 are engaged with the engaging portion 130a. An example is shown in which a groove is formed.

[0053] The shapes of the convex portion 132 and the concave portion 140 are complementary shapes, and may be any shape as long as the electrode terminals can be sandwiched. That is, FIG. 10 shows, as an example, a semicircular shape in which the cross-sectional shape of the concave portion 140 is a triangular shape, whereas the cross-sectional shape of the convex portion 132 has surfaces along the inclined surfaces 121d and 122d. However, the present invention is not limited to this, and the convex portion 132 may be triangular. Furthermore, each may be a semicircular shape, a rectangular shape, or the like.

Further, the position and number of the terminal holes 131 are not limited to those formed on the both sides in the longitudinal direction of the convex portion 132 as shown in FIG. If the pressing member 130 that has warped against the sandwiching member 120 can be brought into close contact with the sandwiching member 120 via the electrode terminal, for example, two on the both sides in the longitudinal direction of the projection 132 are formed in total. Even Yes. Alternatively, if the force for sandwiching the clamping member 120 by the side surface 130c of the pressing member 130 is sufficient to ensure the above-described adhesion, only one piece may be provided on one side in the longitudinal direction of the convex portion 132.

Next, the electrical connection method of the positive electrode terminal 3 and the negative electrode terminal 4 by the sandwiching member 120 and the pressing member 130 of the present embodiment and the method of taking out the voltage from the film-covered battery 1 will be described. To do.

First, the positive electrode terminal 3 is bent along the outer peripheral surface of the second member 122, and similarly, the negative electrode terminal 4 is also bent along the outer peripheral surface of the first member 121. Next, the surfaces 3a and 4a are sandwiched between the joining surfaces 121a and 122a. In the present embodiment, since the first member 121 and the second member 122 are formed with inclined surfaces 121d and 122d, the electrode terminals are bent along the inclined surfaces 121d and 122d.

Next, the pressing member 130 is placed from above the sandwiching member 120 so that the convex portion 132 is aligned with the concave portion 140. At this time, it is preferable to use the mounting jig 50 shown in the first embodiment. Next, the crimping terminal 160 attached to the tip of the voltage extraction wire 161 is aligned with the terminal hole 131 and fastened together with the pressing member 130 with the screw 150 and the nut 151. Since the pressing member 130 is warped as described above, the convex portion 1 32 can connect the electrode terminal in the concave portion 140 by screwing the terminal holes 131 formed at both ends in the longitudinal direction of the pressing member 130 at two locations. Press and fix it so that it is in close contact with the inclined surfaces 121d and 122d. In the present embodiment, the configuration in which the holes are formed by the half hole portions 121c and 122c and the half hole portions 121e and 122e respectively formed of the first member 121 and the second member 122 is shown. Is not limited to this. That is, a hole is formed in one or both of the first member 121 and / or the second member 122, and the terminal hole 131 of the pressing member 130 is formed at a position corresponding to these holes. ! It may be something that you can beat.

[0058] As described above, the positive electrode terminal 3 and the negative electrode terminal 4 are electrically connected by being sandwiched and pressed by the sandwiching member 120 and the pressing member 130. In the present embodiment, the voltage can be taken out simultaneously with the electrical joining of the electrode terminals. Next, FIG. 12 shows an example in which the pressing member 130 and the clamping member 120 of the present embodiment are used for the film-clad battery housed in the cell case. 12 (a) shows an example of series connection, and FIG. 12 (b) shows an example of parallel connection using four film-clad batteries.

In the case of series connection, as described in the first embodiment, two film-clad batteries 1 are arranged, and the clamping member 120 is disposed between the electrode terminals. On the other hand, in the case of parallel connection, the electrode terminals of the two film-clad batteries 1 (explained in the example of the positive electrode terminal 3 in FIG. 12 (b)) are first overlapped, and these two sheets are stacked. The positive electrode terminal 3 thus formed is sandwiched between the joining surfaces 122a and 122b of the sandwiching member 120.

[0061] Note that the interval L between the engaging portions 130a needs to be larger than the width L of the electrode terminal (FIG. 9).

1 2

reference). With this configuration, the electrode terminal and the engaging portion 130a do not interfere with each other.

Parallel connection as shown in (b) of 2 can be realized.

[0062] In each embodiment, a clamping member is provided on the outer wall surface of the cell case, and the electrode terminal extended to the outside of the cell case also has a clamping member and a pressing member cap. An example in which electrical joining is performed by the joining device is shown. However, the present invention is not limited to this, but a sandwiching member is provided on the inner wall surface of the cell case, and the electrode terminals are electrically joined in the cell case.

[0063] In each embodiment, an example in which the cell case and the clamping member are configured separately is shown.

The sandwiching member may be provided integrally with the cell case.

[0064] In the above description, the configuration for extracting the voltage has been described only in the second embodiment, but the method for extracting the voltage shown in the second embodiment is applied to the pressing member of the first embodiment. Needless to say, it is applicable.

As described above, according to the present invention, the electrical connection of the electrode terminals can be easily and reliably performed with parts having only the sandwiching member and the pressing member.

[0066] Further, the joining device of the present invention has a configuration in which both the sandwiching member and the pressing member are sandwiched by the sandwiching member and the pressing member in addition to the sandwiching surface of the sandwiching member, although the sandwiching member and the pressing member are both simple shapes. Therefore, the electrode terminal can be fixed more reliably.

[0067] In addition, the holding member of the present invention having a shape in which the holding surfaces are complementarily engaged can pull out the electrode terminals and can increase the contact area between the electrode terminals. [0068] Further, in the joining device of the present invention in which the holding member has a groove and the pressing member has an engaging portion that engages with the groove, the engagement between the pressing member and the holding member is ensured. Bonding of the electrode terminals held between the holding members is ensured.

[0069] In the joining device of the present invention, the engaging portion may have a hollow shape. Making the engaging portion hollow has an advantage when the engaging portion of the pressing member is engaged with the groove of the holding member. In this case, for example, it is possible to assemble by inserting a rod-like member into the hollow part and opening the pressing member and then engaging, thereby improving the ease of assembling.

[0070] Further, in the joining device of the present invention, the inclined surface that forms the concave portion by disposing the members facing each other on the side where the electrode terminals are inserted on the clamping surface of the clamping member with each member. The pressing member may be formed to have a convex portion at a portion corresponding to the concave portion.

[0071] In addition, in the joining device of the present invention, the pressing member may be an inertia member! /, Or a through hole may be formed on both sides of the convex portion. ! /

[0072] Further, the pressing member of the present invention having elasticity and having a curved shape can firmly clamp the electrode terminal between the pressing member and the holding member by screwing the holding member to the holding member.

[0073] In addition, when an assembled battery is formed, the number of parts can be reduced by providing a clamping member on the wall surface of the storage case (cell case).

Claims

The scope of the claims

[1] In a joining apparatus that electrically joins the electrode terminals of an electrical device with extended electrode terminals,

A clamping member that overlaps the electrode terminal of one electrical device and the electrode terminal of another electrical device and sandwiches it on a clamping surface;

And a pressing member that presses each electrode terminal held by the holding surface in a direction in which the electrode terminals are pressed against each other.

[2] The clamping member has a pair of members formed by forming an outer peripheral surface along the electrode terminal and the clamping surface, and the pressing member includes the first portion and the first member. 2. The joining device according to claim 1, further comprising: two second portions that are connected to each other and that face each other and press each of the clamping members from the outer peripheral surface side opposite to the clamping surface.

[3] The joining device according to claim 2, wherein the clamping member has a shape in which the clamping surface of one of the members and the clamping surface of the other member are complementarily engaged.

[4] Each member of the clamping member has a groove on each opposite surface of the clamping surface, and the pressing member is engaged with the groove at an end of the second portion. The joining device according to claim 2, further comprising an engaging portion.

5. The joining device according to claim 4, wherein the engaging portion has a hollow shape.

[6] On the clamping surface of each member of the clamping member and on the side where each electrode terminal is inserted, an inclined surface that forms a recess is formed by arranging the members facing each other. The bonding apparatus according to claim 2, wherein the pressing member has a convex portion at a portion corresponding to the concave portion.

7. The joining apparatus according to claim 6, wherein the pressing member has through holes formed on both sides of the convex portion.

[8] The joining device according to [6], wherein the pressing member is curved so that the side on which the convex portion is formed is convex.

9. The joining apparatus according to claim 1, wherein the pressing member also includes an elastic member.

[10] The pressing member has a voltage extraction portion for extracting a voltage to the outside.

The joining apparatus according to 1.

[11] The joining device according to claim 10, wherein the pressing member is fixed to the clamping member by the voltage extraction unit.

[12] In a storage case for storing a plurality of electrical devices with electrode terminals extended,

A storage case comprising a holding member configured to overlap the electrode terminal of one electric device and the electrode terminal of another electric device with a holding surface on a wall surface of the storage case .

13. The storage case according to claim 12, wherein the holding member has a pair of members formed by forming an outer peripheral surface along which the electrode terminal is disposed and the holding surface.

14. The storage case according to claim 13, wherein the holding surface of one of the members and the holding surface of the other member mesh with each other in a complementary manner.

15. The storage case according to claim 12, wherein each of the members of the clamping member has a groove on each opposite surface of the clamping surface.

[16] A method for manufacturing an electrical device assembly configured by electrically joining the electrode terminals of an electrical device with extended electrode terminals!

A step of preparing a holding member that overlaps the electrode terminals of one electric device and the electrode terminals of another electric device and holds them between holding surfaces;

Preparing a pressing member that presses the electrode terminals sandwiched between the clamping surfaces in a direction in which they are pressed against each other;

The electrode terminals of the one electric device and the electrode terminals of the other electric device overlapped between the clamping surfaces and sandwiched between the clamping members by the pressing member. And pressing them in a direction in which they are pressed against each other.