JPWO2006046585A1 - Joining apparatus, storage case, and method of manufacturing electrical device assembly - Google Patents

Abstract

The joining device (100) of the present invention for electrically joining the electrode terminals (3, 4) of the film-clad battery (1) includes a first member (21) and a second member (22). It has a member (20) and a pressing member (30). The pressing member (30) includes the positive electrode terminal (3) and the negative electrode terminal (4) of the film-covered battery (1) that are overlapped and held on the holding surfaces (21a, 22a) of the holding member (20). ) In the direction in which they are pressed against each other.

Description

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

  In recent years, development of electric vehicles and hybrid electric vehicles (hereinafter simply referred to as “electric vehicles etc.”) equipped with a battery for driving a motor has been rapidly advanced. A battery mounted in an electric vehicle or the like is naturally required to be light in weight in order to improve the maneuvering characteristics and one charge travel distance. In order to reduce the weight of the battery, a film-clad battery using a laminate material in which a metal layer such as aluminum and a heat-weldable resin layer are laminated on the outer package via an adhesive layer to form a thin film has been developed. ing. The laminate material generally has a structure in which both surfaces of a thin metal layer such as aluminum are covered with a thin resin layer, and is resistant to acids and alkalis, and has a lightweight and flexible property.

  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. As a method of connecting battery terminals, conventionally, as shown in FIG. 1, a terminal of one battery and a terminal of another battery are joined using bolts and nuts, or by welding, welding, or the like. The method of joining was generally employed.

  FIG. 1A and FIG. 1B show a method of electrically connecting electrode terminals together. FIG. 1A shows a method of mechanically fastening the electrode terminals 201 with bolts 203 and nuts 204. That is, in the method shown in FIG. 1A, the electrode terminal 201 extended 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 sandwiched. After being pinched by the plate 202, the bolt 203 and the nut 204 are fastened. On the other hand, FIG. 1B 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 the electrode terminals 201 as shown in FIGS. 1 and 2B, the electrode terminals 201 are kept facing each other as shown in FIG. The parts may be joined by fastening with bolts and nuts or welding.

  Moreover, in order to take out a voltage from the assembled battery comprised as mentioned above, the harness 206 with a terminal is joined to the electrode terminal 201, as shown in FIG. 3 is fastened to the electrode terminal 201 with bolts and nuts.

  However, joining the electrode terminals with bolts and nuts increases the number of parts and requires time and labor for joining. Similarly, in the case of welding, time and labor are required. Moreover, in the case of the structure mentioned above, it is necessary to attach the terminal which takes out a voltage to an electrode terminal as another operation | work irrespective of joining of electrode terminals.

  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 fixing base portion is bent around the axis. And the terminal of the two thin batteries laminated | stacked so that the positive electrode terminal of one thin battery and the positive electrode terminal of another thin battery may become the same direction is clamped with the buffer material arrange | positioned facing. Furthermore, when the engaging member is engaged 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 that saves labor and time required for joining compared to joining using bolts and nuts, and also facilitates removal of the battery from the assembled battery.

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

  The present invention has been made in view of the problems as described above, and is composed of a small number of parts, and includes a joining device, a storage case, and an electrical device assembly that enable easy and reliable electrical joining of electrode terminals. Aimed at manufacturing method.

  The joining device of the present invention is a joining device for electrically joining the electrode terminals of an electrical device from which the electrode terminals extend, and sandwiching the electrode terminal of one electrical device and the electrode terminal of another electrical device in an overlapping manner 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.

  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 addition, since the joining device of the present invention overlaps and joins the electrode terminals with the clamping members, and further presses the electrode terminals in a direction in which the electrode terminals are pressed against each other by the pressing member, more reliable electrical connection of the electrode terminals is achieved. Can be done.

  In the joining device of the present invention, the holding member has an outer peripheral surface along which the electrode terminal is placed and a pair of members formed with the holding surface, and the pressing member includes the first portion and the first portion. And two second portions that are opposed to each other and press each clamping member from the outer peripheral surface opposite to the clamping surface. The shape of the pressing member by the first portion and the second portion 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 on the holding surface 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 are more securely fixed together with the clamping by the clamping member and the pressing member in addition to the clamping by the clamping surface of the clamping member.

  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 are complementarily engaged. This makes it difficult for the electrode terminals sandwiched between the sandwiching surfaces to come out of the sandwiching surfaces and increases the contact area between the electrode terminals.

  Further, in the joining device of the present invention, each member of the clamping member has a groove on each surface opposite to each clamping surface, and the pressing member has an engaging portion that engages with the groove at the end of the second portion. You may have. 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. Thereby, joining of the electrode terminal clamped by the clamping member is also ensured.

  In the joining device of the present invention, the engaging portion may be hollow. When the engaging part is made hollow, the engaging part of the pressing member is engaged with the groove of the holding member, for example, after the rod-shaped member is inserted into the hollow part and the pressing member is opened, the engaging part is engaged. It is possible to adopt a method such as Thereby, the assembly | attachment of a joining apparatus becomes easy.

  Further, in the joining device of the present invention, an inclined surface that forms a recess by forming the respective members facing each other is formed on the clamping surface with each member of the clamping member and on the side where each electrode terminal is inserted. The pressing member may have a convex portion at a portion corresponding to the concave portion.

  Further, the joining device of the present invention may be one in which through holes are formed on both sides of the convex part, and is curved so as to be convex in the direction in which the convex part protrudes. Alternatively, the pressing member may be an elastic 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 elastic and curved pressing member 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. Thereby, an electrode terminal can be pinched strongly by the convex part of a pressing member, and the recessed part of a clamping member.

  In addition, the pressing member of the joining device of the present invention may have a voltage extracting portion for extracting voltage to the outside, and further may be fixed to the clamping member by the voltage extracting portion. Good.

  The storage case of the present invention is a storage case for storing a plurality of electrical devices with electrode terminals extending, and the electrode terminals of one electrical device and the electrode terminals of another electrical device are overlapped and sandwiched between the sandwiching surfaces. It has a holding member on the wall surface which comprises a storage case, It is characterized by the above-mentioned.

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

  Further, the holding member of the storage case of the present invention may have an outer peripheral surface along which the electrode terminal is placed and a pair of members formed with a holding surface, or a holding surface of one member Further, the shape may be such that the holding surface of the other member meshes complementarily, and each member of the holding member may have a groove on the opposite surface of each holding surface.

  Further, the method for manufacturing an electrical device assembly according to the present invention is the method for manufacturing an electrical device assembly configured by electrically joining the electrode terminals of the electrical device in which the electrode terminals extend. A step of preparing a holding member that overlaps the terminal and the electrode terminal of another electrical device on the holding surface and a pressing member that presses the electrode terminals held on the holding surface in a pressure-contacting manner are prepared. And a step of pressing the electrode terminals of one electric device and the electrode terminals of another electric device on the clamping surface in a direction in which the electrode terminals sandwiched between the clamping members are pressed against each other. It is characterized by that.

  The method for producing an electrical device assembly of the present invention uses a clamping member and a pressing member, and the electrode terminals are electrically connected to each other only by overlapping the electrode terminals on the clamping surface of the clamping member and pressing them with the pressing member. Can be joined. For this reason, when manufacturing the assembled battery using storage batteries, such as a film-clad battery, or the capacitor | condenser connected in multiple as an electrical device, the manufacturing process can be simplified.

  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.

It is a figure which shows an example of the conventional joining method of an electrode terminal in a film-clad battery. It is a figure which shows the other example of the conventional joining method of the electrode terminal in a film-clad battery. It is a figure which shows an example of the taking-out method of the conventional voltage of an electrode terminal in a film-clad battery. It is an external appearance perspective view of the film-clad battery applicable to this 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. It is a disassembled perspective view of a junction part. It is a figure explaining attachment of the joining tool by a mounting jig. It is a schematic diagram which shows the example which applied the terminal junction of the 1st Embodiment of this invention to the assembled battery. It is a disassembled perspective view of the terminal junction part of the 2nd Embodiment of this invention. It is sectional drawing of the connector of the 2nd Embodiment of this invention, (a) is sectional drawing in the AA line shown in FIG. 9, (b) is FIG. 9 in the state which attached the output terminal. It is sectional drawing in the BB line shown in FIG. It is a sectional side view of the connector of the 2nd Embodiment of this invention. It is the example using the connector and the joining apparatus of the 2nd Embodiment of this invention, (a) is an example of series connection, (b) is an example of the parallel connection by four film-clad batteries.

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

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

  The film-clad battery 1 according to this 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 film. The laminate film 7 formed in this way has a structure in which the four sides of the heat-sealed portion 7a are heat-sealed and sealed.

  The power generation 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 a strip-shaped positive electrode side active electrode and Even if it is a wound type of a structure in which the negative electrode side active electrode and the negative electrode side active electrode are alternately stacked by stacking the negative electrode side active electrode through a separator and then compressing it to a flat shape Good.

  In addition, as the power generation element 2, any power generation element used for a normal battery is applicable as long as it includes a positive electrode, a negative electrode, and an electrolyte. The power generation elements in a typical lithium ion secondary battery include a positive electrode plate in which a positive electrode active material such as lithium-manganese composite oxide and lithium cobaltate is applied on both sides of an aluminum foil, etc., and carbon that can be doped and dedoped with lithium. A negative electrode plate coated with a material on both sides of a copper foil or the like is opposed to each other with a separator interposed between them and impregnated with an electrolytic solution containing a lithium salt. Other examples of the power generation element 2 include power generation elements of other types of chemical batteries such as nickel metal hydride batteries, nickel cadmium batteries, lithium metal primary batteries or secondary batteries, and lithium polymer batteries. Furthermore, the present invention provides an external device that stores electrical energy and generates gas by chemical reaction or physical reaction, such as a capacitor element exemplified by a capacitor such as an electric double layer capacitor and an electrolytic capacitor. The present invention can also be applied to an electric device sealed with a film.

  From the heat-sealing part 7a in the short direction of the film-clad battery 1, the positive electrode terminal 3 connected to the positive electrode side active electrode and the negative electrode terminal 4 connected to the negative electrode side active electrode extend opposite to each other. I'm out. Aluminum is often used for the positive electrode terminal 3, and copper or nickel is often used for the negative electrode terminal 4 due to its electrical characteristics.

  Next, FIG. 5 shows a partially enlarged view 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.

  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 to the outside from the opening 10a. 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 21 a and 22 a of the clamping member 20. Further, in this state, the pressing member 30 is fixed over the clamping member 20 from above.

  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 have a wave shape that engages with each other, that is, a complementary shape, in order to prevent the sandwiched electrode terminals from coming off. In the present embodiment, the shape of the sandwiching surfaces 21a and 22a makes it difficult for each electrode terminal to come out of the sandwiching surfaces 21a and 22a, and excessively presses the overlapping positive electrode terminal 3 and negative electrode terminal 4 with each other. In order to avoid concentrating on, a gentle wave shape as shown in FIGS. However, the shape of the clamping surfaces 21a and 22a is not limited to such a shape, and may be, for example, a triangular wave shape or a rectangular wave shape.

  In addition, a semicircular engagement 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 holding surfaces 21a and 22a. Each groove 23 is 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 position height with 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 preferred. 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 the positive electrode. The 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.

  Moreover, although the clamping member 20 shows the example in which the 1st member 21 and the 2nd member 22 were comprised completely separately, for example, it mutually joins in the site | part which does not interfere with the electrode terminal inserted. And may be integrated. In this case, in order to realize good electrical bonding of the electrode terminals, it is preferable that the bonding portion has elasticity and the gap formed by the sandwiching surfaces 21a and 22a is sufficiently narrow. Such a configuration reduces the number of parts.

  The pressing member 30 is for securely fixing and joining 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. It is. The pressing member 30 is a thin plate having elasticity which is bent into a U-shape including an upper surface 30b and two side surfaces 30c connected to the upper surface 30b. As long as the material of the pressing member 30 has elasticity, a metal thin plate may be used, or an insulating resin may be used in consideration of the insulation of the electrode terminal with respect to the outside.

Engagement portions 30a for hooking into the engagement grooves 23 of the clamping member 20 are formed at the end portions near the four corners of the side surface 30c. The pressing member 30 is inserted from the upper surface 20 a side of the clamping member 20 and attached to the clamping member 20. For this reason, the engaging portion 30 a needs to be easily slid on the side surface 20 b of the holding member 20 and difficult to come off when it is caught by the engaging groove 23. Therefore, the shape of the engaging part 30a is formed in a cylindrical shape. Further, the engaging portion 30a may be formed by roll bending so as to have a hollow cylindrical shape as shown in FIG. 5, or may be a solid cylindrical shape. The counter engaging portion 30a (e.g., 30a ₁ and 30a 2 shown in FIG. ₅₎ distance l between, since the fixed electrode terminal made more reliable by increasing the pressing force, sandwich the electrode terminal It is formed slightly narrower than the interval L (see FIG. 6) of the engaging groove 23 in the state. The engaging portion 30a may be omitted.

  Further, the upper surface 30 b of the pressing member 30 may be bent so as to be convex with respect to the upper surface 20 a of the clamping member 20 in a state of being attached to the clamping member 20. Accordingly, 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 holding member 20 and the pressing member 30 will be described.

  First, the positive electrode terminal 3 and the negative electrode terminal 4 are extended from the opening 10 a of the cell case 10. Next, the clamping member 20 including the first member 21 and the second member 22 is disposed between the positive electrode terminal 3 and the negative electrode terminal 4. The clamping member 20 is arranged on the wall surface of the cell case 10 so that each engaging groove 23 of the clamping 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 also bends the first member 21 along the outer peripheral surface. Next, the surfaces 3b and 4b of the electrode terminals are sandwiched between the clamping surfaces 21a and 22a. Next, the electrode terminals 3b and 4b are pressed from both sides of the clamping member 20 in order to 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 provided with an insertion portion 50a that can be inserted into the hole of the engaging portion 30a at the tip. The mounting jig 50 rotates in the 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 the direction (arrow B direction in the figure).

  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 clamping 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 clamping member 20. After alignment, the engaging member 30a is engaged with the engaging groove 23 by rotating the upper part of the mounting jig 50 in the opening direction and closing the pressing member 30. Finally, by removing the insertion portion 50a from the hole of the engagement portion 30a, the mounting of the pressing member 30 to the clamping member 20 is completed. 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 21 a and 22 a of the clamping member 20, so that the positive electrode terminal 3 and the negative electrode terminal 4 can be reliably connected to each other. Is made.

  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.

(Second Embodiment)
FIG. 9 is an exploded perspective view of the terminal joint portion of the present embodiment. FIG. 10A is a cross-sectional view of the connector of the present embodiment taken along line AA shown in FIG. 9, and FIG. 10B is a cross-sectional view of FIG. Sectional drawing in B line is shown, respectively. Moreover, in FIG. 11, the sectional side view of the connector of this embodiment is shown.

  The pressing member 130 of the present embodiment has a convex portion 132 for pressing the electrode terminal on the upper surface 130b. In addition, terminal holes 131 are formed at both ends of the convex portion 132 to which output terminals for extracting 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 protrudes and curves so that the convex part 132 becomes convex. An engaging portion 130a is formed on a side surface 130c for fixing the pressing member 130 of this embodiment with the holding member 120 interposed therebetween. In the first embodiment, the example in which the engaging portion is formed in the inner winding is shown. However, in the present embodiment, the example in which the engaging portion is formed in the outer winding is shown.

  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. The positive electrode terminal 3 and the negative electrode terminal 4 are sandwiched. In the present embodiment, the first member 121 and the second member 122 have a bilaterally symmetric shape, 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 serving 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 holes for disposing the nuts 151 to be engaged with the screws 150 correspond to the terminal holes 131 of the pressing member 130. Formed in position.

  The first member 121 and the second member 122 are formed with inclined surfaces 121d and 122d for forming the concave portion 140 at portions corresponding to the convex portion 132 of the pressing member 130, respectively. In addition, since the engaging part 130a of the pressing member 130 of this embodiment is an outer winding shape as described above, the first member 121 and the second member 122 are engaged with the engaging part 130a. The example in which the joint groove is not formed is shown.

  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 an example of a semicircular shape in which the cross-sectional shape of the concave portion 140 is triangular, whereas the cross-sectional shape of the convex portion 132 has surfaces along the inclined surfaces 121d and 122d. It is not limited to this, and the convex part 132 is good also as a triangular shape. 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. It may be. Or as long as the force which pinches the clamping member 120 with the side surface 130c of the pressing member 130 is enough to ensure the said adhesiveness, it is good also as a structure of only one in the longitudinal direction one side of the convex part 132. FIG.

  Next, a method for electrically connecting the positive electrode terminal 3 and the negative electrode terminal 4 by the sandwiching member 120 and the pressing member 130 according to the present embodiment and a method for extracting the voltage from the film-coated battery 1 will be described.

  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 bonding 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, each electrode terminal is 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 corresponds to the concave portion 140. At this time, it is preferable to use the mounting jig 50 shown in the first embodiment. Next, the crimp terminal 160 attached to the tip of the voltage lead-out line 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 132 tilts 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. It is pressed and fixed so as to be in close contact with the 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 the second member 122, and the terminal hole 131 of the pressing member 130 is formed at a position corresponding to these. May be.

  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 a film-clad battery housed in a cell case. (A) of FIG. 12 is an example of series connection, and (b) of FIG. 12 is an example of parallel connection by 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 by taking the positive electrode terminal 3 as an example in FIG. 12B) are first overlapped, and the two sheets are stacked. The positive electrode terminal 3 is sandwiched between the joining surfaces 122 a and 122 b of the sandwiching member 120.

The distance _{L 1} of the engaging portion 130a is required to be wider than the width _{L 2} of the electrode terminals (see FIG. 9). With such a configuration, the parallel connection as shown in FIG. 12B can be realized without interference between the electrode terminal and the engaging portion 130a.

  In each embodiment, the 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 is electrically connected to the outside by the joining device including the clamping member and the pressing member. An example of joining is shown. However, the present invention is not limited to this, and a sandwiching member may be provided on the inner wall surface of the cell case, and the electrode terminals may be electrically joined in the cell case.

  Moreover, in each embodiment, although the cell case and the clamping member were shown as an example comprised separately, the structure by which the clamping member was integrally provided in the cell case may be sufficient.

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

  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.

  Further, in the joining device of the present invention, since the sandwiching member and the pressing member are both simple shapes, in addition to sandwiching by the sandwiching surface of the sandwiching member, sandwiching by the sandwiching member and the pressing member is also performed. The electrode terminal can be fixed more reliably.

  Moreover, the clamping member of the present invention having a shape in which the clamping surfaces are engaged with each other in a complementary manner can make it difficult for the electrode terminals to be pulled out, and can widen the contact area between the electrode terminals.

  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. The joined electrode terminals are securely joined.

  In the joining device of the present invention, the engaging portion may be hollow. The engagement portion having a hollow shape is advantageous when the engagement portion of the pressing member is engaged with the groove of the clamping member. In this case, for example, it becomes 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.

  Further, in the joining device of the present invention, an inclined surface is formed which forms a recess by arranging each member to face each other on the side where each electrode terminal is inserted on the 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.

  In the joining device of the present invention, the pressing member may be made of an elastic member, or through holes may be formed on both sides of the convex portion.

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

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

Claims (16)

In the joining apparatus for electrically joining the electrode terminal of the electrical device in which the electrode terminal extends,
A clamping member that overlaps the electrode terminals of one electrical device and the electrode terminals of another electrical device and sandwiches them on a clamping surface;
And a pressing member that presses the electrode terminals clamped by the clamping surfaces in a direction in which the electrode terminals are pressed against each other. The clamping member has a pair of members formed with an outer peripheral surface along which the electrode terminal is placed and the clamping surface, and the pressing member is connected to the first portion and the first portion, and The joining apparatus according to claim 1, further comprising: two second portions that face each other and press each of the clamping members from the outer peripheral surface side opposite to the clamping surface. The joining apparatus according to claim 2, wherein the sandwiching member has a shape in which the sandwiching surface of one of the members and the sandwiching surface of the other member are complementarily engaged with each other. Each member of the clamping member has a groove on each opposite surface of each clamping surface, and the pressing member has an engaging portion that engages with the groove at the end of the second portion. The joining apparatus according to claim 2. The joining device according to claim 4, wherein the engaging portion has a hollow shape. 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, and the pressing member is The joining device according to claim 2, wherein the joining device has a convex portion at a portion corresponding to the concave portion. The joining device according to claim 6, wherein the pressing member has through holes formed on both sides of the convex portion. The joining apparatus according to claim 6, wherein the pressing member is curved so that the side on which the convex portion is formed is convex. The joining device according to claim 1, wherein the pressing member is made of an elastic member. The joining apparatus according to claim 1, wherein the pressing member includes a voltage extraction unit for extracting a voltage to the outside. The bonding apparatus according to claim 10, wherein the pressing member is fixed to the clamping member at the voltage extraction unit. 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 constituting the storage case . The storage case according to claim 12, wherein the holding member has a pair of members formed with an outer peripheral surface along which the electrode terminal is placed and the holding surface. 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. The storage case according to claim 12, wherein each member of the clamping member has a groove on a surface opposite to each clamping surface. In the method of manufacturing an electrical device assembly configured by electrically joining the electrode terminals of the electrical device from which the electrode terminals extend,
A step of preparing a clamping member that overlaps the electrode terminals of one of the electrical devices and the electrode terminal of another electrical device and sandwiches between the clamping surfaces;
Preparing a pressing member that presses the electrode terminals sandwiched by the sandwiching surfaces in a direction in which they are pressed against each other;
The electrode terminals of the one electrical device and the electrode terminals of the other electrical device are overlapped with each other between the clamping surfaces, and the electrode terminals sandwiched between the clamping members by the pressing member are mutually connected. And a step of pressing in the direction of pressure contact.

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