JP6623899B2 - Method for manufacturing power storage device - Google Patents

Description

  The present invention relates to a method for manufacturing a power storage device including an external connection terminal and an outer insulating member.

  2. Description of the Related Art Conventionally, vehicles such as EVs (Electric Vehicles) and PHVs (Plug in Hybrid Vehicles) are equipped with a lithium ion secondary battery, a nickel hydrogen secondary battery, or the like as a power storage device for storing power supplied to an electric motor or the like. . Generally, a secondary battery includes an electrode assembly in which a positive electrode and a negative electrode having an active material layer are layered, and a case for housing the electrode assembly. A terminal structure is connected to the positive electrode and the negative electrode via a conductive member.

  For example, the battery terminal structure disclosed in Patent Literature 1 includes a rivet terminal 81 that penetrates a cover plate 80 and protrudes to the outside as shown in FIG. Further, the terminal structure includes an upper insulating sealing plate 82 disposed on the lid plate 80. The lower end caulking portion 81a of the rivet terminal 81 penetrates the upper insulating sealing plate 82.

  The terminal structure includes a terminal connecting rod 83 arranged on the upper insulating sealing plate 82. The terminal connecting rod 83 has a fitting hole 83a, and the upper end caulking portion 81b of the rivet terminal 81 is fitted into the fitting hole 83a.

  The lid plate 80, the upper insulating sealing plate 82, and the terminal connecting rod 83 are sandwiched between the lower caulking portion 81 a and the upper caulking portion 81 b of the rivet terminal 81. The rivet terminal 81 and the terminal connecting rod 83 are electrically connected by caulking.

The terminal structure includes a terminal bolt 84. The terminal bolt 84 includes a bolt portion 84a. The bolt portion 84a is fitted in the through hole 83b of the terminal connecting rod 83.
The terminal structure of Patent Literature 1 includes a rivet terminal 81 having a projection 81c serving as a positioning projection. The protrusion 81c is fitted into a sub-fitting hole 83c as an engaging hole of the terminal connection rod 83, and the protrusion 81c is engaged with the inner surface of the sub-fitting hole 83c. By the protrusion 81c being fitted into the sub-fitting hole 83c, the rotation of the terminal connecting rod 83 about the caulking parts 81a and 81b is suppressed.

JP 2003-92103 A

  By the way, in the terminal structure of Patent Literature 1, in order to improve the assemblability, the terminal bolt 84 is previously fitted and integrated into the through hole 83b of the terminal connecting rod 83, and then the fitting hole 83a of the terminal connecting rod 83 is formed. In some cases, the upper end caulking portion 81b of the rivet terminal 81 is penetrated. However, when the terminal bolt 84 is fitted to the terminal connecting rod 83, the fitting may deform the terminal connecting rod 83. Then, due to the deformation of the terminal connection rod 83, the auxiliary fitting hole 83c is deformed so as to have a smaller opening width, and the projection 81c cannot be fitted into the sub-fitting hole 83c. As a result, the projection 81c cannot be engaged with the sub-fitting hole 83c, and the rotation of the terminal connecting rod 83 cannot be suppressed.

  SUMMARY OF THE INVENTION The present invention has been made in view of the problems existing in the related art, and has as its object to provide a method for manufacturing a power storage device capable of suppressing deformation of an engagement hole.

  A method for manufacturing a power storage device for solving the above problems includes an electrode assembly in which electrodes of different polarities are insulated from each other and stacked, a case containing the electrode assembly, and a wall of the case. An external connection terminal disposed outside, an extraction terminal electrically connected to the electrode assembly, and penetrating the wall portion and protruding to the outside; and an extraction terminal disposed outside the wall portion, and A terminal connecting member that connects the terminal and the external connection terminal, and insulates the external connection terminal and the wall outside the wall, and extends along a direction in which the extraction terminal protrudes from the wall. An outer insulating member through which a lead terminal penetrates, wherein the outer insulating member has a positioning projection having a shape protruding toward the terminal connecting member, and the terminal connecting member is press-fitted with the external connecting terminal. Press-fit hole and the draw-out terminal Manufacturing of a power storage device having a through hole inserted, and an engaging hole engaged with the positioning projection, wherein the press-fitting hole and the engaging hole are juxtaposed in a surface direction of the terminal connecting member. A method of press-fitting the external connection terminal into the press-fitting hole with a jig fitted in the engagement hole of the terminal connection member; and removing the jig from the engagement hole; Inserting the positioning protrusion of the outer insulating member into the engagement hole of the terminal connection member having the external connection terminal press-fitted into the press-fitting hole.

  According to this, the external connection terminal is press-fitted into the press-fitting hole with the jig fitted in the engagement hole. At this time, the periphery of the press-fitting hole in the terminal connecting member is deformed in a direction of expanding the press-fitting hole along the surface direction of the terminal connecting member. The terminal connection member attempts to deform so that the opening width of the engagement hole is reduced, but the deformation of the engagement hole is restricted by the inner surface of the engagement hole hitting the jig. For this reason, in the step after the jig is removed from the engagement hole, the positioning projection of the outer insulating member can be inserted into the engagement hole, and the positioning projection can be engaged with the inner surface of the engagement hole.

  Further, in the method for manufacturing a power storage device, the terminal connection member has a rectangular shape, the surface direction is a longitudinal direction, and the engagement hole has a long hole shape that extends in a short direction of the terminal connection member. The jig may have an elongated column shape.

  According to this, when the external connection terminal is press-fitted into the press-fitting hole, even if the terminal connection member is deformed toward the engagement hole at any position in the short direction, the deformation is regulated by the jig. Becomes possible.

  Further, the power storage device is a secondary battery.

  According to the present invention, the deformation of the engagement hole can be suppressed.

FIG. 2 is an exploded perspective view showing the secondary battery of the embodiment. FIG. 1 is an exemplary perspective view showing the appearance of a secondary battery according to an embodiment. Sectional drawing which shows a terminal structure. The perspective view which shows a jig. (A) is sectional drawing which shows the state which fitted the jig in the engagement hole, (b) is sectional drawing which shows the state which removed the jig after press-fitting of the external connection terminal. The figure which shows background art.

Hereinafter, an embodiment in which a method for manufacturing a power storage device is embodied as a method for manufacturing a secondary battery will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1 or 2, a secondary battery 10 as a power storage device includes a case 11. The secondary battery 10 includes an electrode assembly 12 and an electrolyte (not shown) housed in a case 11. The case 11 has a square box-shaped case member 14 and a rectangular flat plate-shaped lid member 15 that closes an opening 14 a of the case member 14. The cover member 15 forms a wall of the case 11. The secondary battery 10 of the present embodiment is a lithium ion battery.

  The electrode assembly 12 includes a plurality of sheet-shaped positive electrodes 21 and a plurality of sheet-shaped negative electrodes 31. The positive electrode 21 and the negative electrode 31 have different polarities. Although not shown in detail, the positive electrode 21 includes a positive metal foil (aluminum foil in the present embodiment) and positive electrode active material layers present on both surfaces of the positive metal foil. The negative electrode 31 has a negative electrode metal foil (a copper foil in the present embodiment) and negative electrode active material layers present on both surfaces of the negative electrode metal foil. The electrode assembly 12 is of a layered type in which a plurality of positive electrodes 21 and a plurality of negative electrodes 31 are layered with a separator 24 interposed therebetween for insulating them.

  The positive electrode 21 has a tab 25 having a shape protruding from a part of one side of the positive electrode 21. The negative electrode 31 has a tab 35 having a shape protruding from a part of one side of the negative electrode 31. The plurality of positive electrode tabs 25 and the plurality of negative electrode tabs 35 are provided at positions where the positive electrode tab 25 and the negative electrode tab 35 do not overlap in a state where the positive electrode electrode 21 and the negative electrode electrode 31 are stacked. . The electrode assembly 12 has a tab-side end surface 12b on which the tabs 25 and 35 protrude.

  The secondary battery 10 has a positive electrode tab group 36 protruding from the tab side end surface 12b. The positive electrode tab group 36 is configured by collecting and stacking all the positive electrode tabs 25 on one end side of the electrode assembly 12 in the stacking direction. The secondary battery 10 includes a negative electrode tab group 36 protruding from the tab side end surface 12b. The negative electrode tab group 36 is configured by collecting and stacking all the negative electrode tabs 35 on one end side of the electrode assembly 12 in the stacking direction.

  A positive electrode conductive member 51 is joined to the positive electrode tab group 36. The positive electrode tab group 36 is joined to one longitudinal end of the positive electrode conductive member 51. A positive electrode lead-out terminal 60 is joined to the other end of the positive electrode conductive member 51 in the longitudinal direction.

  A negative electrode conductive member 51 is joined to the negative electrode tab group 36. A tab group 36 of the negative electrode is joined to one end in the longitudinal direction of the conductive member 51 of the negative electrode. A negative electrode lead-out terminal 60 is joined to the other end of the negative electrode conductive member 51 in the longitudinal direction. Each conductive member 51 is disposed between the inner surface 15 d of the lid member 15 and the tab-side end surface 12 b of the electrode assembly 12.

  Next, the positive terminal structure 16 and the negative terminal structure 17 will be described. Since the positive electrode terminal structure 16 and the negative electrode terminal structure 17 have substantially the same configuration, common members will be described using the same member numbers. FIG. 3 shows only the positive electrode terminal structure 16.

  As shown in FIG. 1 or 3, the lid member 15 has an outer surface 15 c facing the outside of the case 11 and an inner surface 15 d facing the inside of the case 11. In the cover member 15, a direction connecting the outer surface 15c and the inner surface 15d at the shortest distance is defined as a thickness direction.

  The lid member 15 includes locking projections 18 on both sides in the longitudinal direction. Each locking projection 18 has a shape protruding from the outer surface 15c along the thickness direction. When the lid member 15 is viewed from the outer surface 15c, the locking projection 18 has a ridge shape that extends in the longitudinal direction of the lid member 15. Each locking projection 18 is located at the center of the cover member 15 in the lateral direction. The lid member 15 has an insertion hole 15e outside the locking projection 18 in the longitudinal direction.

  The positive electrode terminal structure 16 and the negative electrode terminal structure 17 include an outer insulating member 57 disposed on the outer surface 15c of the lid member 15. In the positive electrode terminal structure 16, the outer insulating member 57 insulates the positive external connection terminal 66 and the lead terminal 60 from the lid member 15. In the negative electrode terminal structure 17, the outer insulating member 57 insulates the external connection terminal 66 and the lead-out terminal 60 of the negative electrode from the lid member 15.

  The outer insulating member 57 is made of a synthetic resin. The outer insulating member 57 has a rectangular shape when viewed from the outer surface 15c of the lid member 15. The longitudinal direction of the outer insulating member 57 is along the longitudinal direction of the lid member 15, and the lateral direction of the outer insulating member 57 is along the lateral direction of the lid member 15. The outer insulating member 57 has a back surface 57a facing the outer surface 15c of the lid member 15, and a front surface 57c parallel to the back surface 57a. In the outer insulating member 57, a direction connecting the back surface 57a and the front surface 57c is defined as a thickness direction.

  The outer insulating member 57 includes a positioning protrusion 58 near one end in the longitudinal direction. The positioning projection 58 has a shape protruding from the surface 57c in the thickness direction. The positioning projection 58 has an elongated shape that extends in the short direction of the outer insulating member 57.

  The outer insulating member 57 includes a detent recess 59 recessed in the thickness direction from the back surface 57a near one end in the longitudinal direction. The detent recess 59 has an elongated shape extending in the longitudinal direction of the lid member 15. The opening shape of the detent recess 59 is similar to the outer shape of the locking projection 18 when the lid member 15 is viewed from the outer surface 15c, and is slightly smaller than the outer shape of the locking projection 18.

  The outer insulating member 57 is installed on the outer surface 15 c of the lid member 15 in a state where the locking projection 18 is inserted into the rotation preventing recess 59. The inner surface of the rotation preventing recess 59 is in contact with the outer surface of the locking projection 18. Here, the lid member 15 is fixed to the case member 14. For this reason, the movement of the outer insulating member 57 in the direction along the outer surface 15c of the lid member 15 is restricted by the contact of the inner surface of the rotation preventing concave portion 59 with the outer surface of the locking convex portion 18, and particularly, The rotation at is regulated.

The outer insulating member 57 has an insertion hole 57d near the other end in the longitudinal direction. The insertion hole 57d is located at a position coinciding with the insertion hole 15e of the lid member 15.
The positive terminal structure 16 and the negative terminal structure 17 include external connection terminals 66 disposed outside the lid member 15. The external connection terminal 66 enables the bus bar that electrically connects the secondary batteries 10 to be fixed outside the cover member 15. The external connection terminal 66 is made of metal.

  The external connection terminal 66 includes a disk-shaped bolt head 67 and a shaft 68 having a shape protruding from one end surface of the bolt head 67 along the axial direction of the external connection terminal 66. A bus bar fastening nut can be screwed into the shaft portion 68. The bolt head 67 has a larger diameter than the shaft 68.

  Each of the positive electrode terminal structure 16 and the negative electrode terminal structure 17 includes a lead terminal 60. The lead terminal 60 is electrically connected to the tab group 36 via the conductive member 51. Therefore, the extraction terminal 60 is electrically connected to the electrode assembly 12. The lead terminal 60 includes a connecting shaft portion 60a electrically connected to a terminal connecting member 44 described later and a base portion 60b electrically connected to the conductive member 51 in the axial direction. The lead terminal 60 is integrated with the conductive member 51 by joining the base 60 b to the conductive member 51.

  The positive terminal structure 16 and the negative terminal structure 17 include a terminal connecting member 44. The terminal connection member 44 has a rectangular plate shape. The terminal connection member 44 has a back surface 44 a facing the outer insulating member 57 and a front surface 44 b facing the outside of the case 11. In the terminal connecting member 44, the direction connecting the back surface 44a and the front surface 44b at the shortest distance is defined as the thickness direction.

  The terminal connection member 44 includes an engagement hole 45 near one end in the longitudinal direction that is the surface direction of the terminal connection member 44. The engagement hole 45 penetrates the terminal connection member 44 in the thickness direction. The engagement hole 45 has a long and narrow shape in the short direction of the terminal connection member 44. At the time of manufacturing the secondary battery 10, a jig 52 is fitted into the engagement hole 45.

  As shown in FIG. 4, the jig 52 is made of, for example, iron. The jig 52 includes a rectangular plate-shaped substrate 53 and an elongated columnar engaging protrusion 54 protruding from the substrate 53. The length L1 of the engaging ridge 54 in the longitudinal direction is slightly smaller than the length N1 of the engaging hole 45 in the longitudinal direction. It is slightly smaller than the dimension N2 in the hand direction. When the engagement ridge 54 is fitted into the engagement hole 45, the outer surface of the engagement ridge 54 contacts the entire inner surface of the engagement hole 45.

  As shown in FIG. 1 or 3, the positioning protrusion 58 of the outer insulating member 57 is inserted into the engagement hole 45. The outer surface of the positioning protrusion 58 is in contact with the inner surface of the engagement hole 45. Due to this contact, the movement of the terminal connection member 44 in the direction along the surface 57c of the outer insulating member 57 is restricted, and in particular, the rotation on the surface 57c is restricted.

  The terminal connection member 44 has a press-fit hole 47 at a position adjacent to the engagement hole 45 along the longitudinal direction. The press-fit hole 47 has a circular shape. Before the press-fitting of the external connection terminal 66, the diameter of the press-fit hole 47 is slightly larger than the diameter of the shaft portion 68 of the external connection terminal 66.

  The bolt head 67 is press-fitted into the press-fit hole 47. The external connection terminal 66 is integrated with the terminal connection member 44 in a state where the external connection terminal 66 is prevented from rotating by the press-fitting of the bolt head 67 into the press-fitting hole 47. In the terminal connection member 44, the external connection terminal 66 is inserted into the press-fit hole 47 and the bolt head 67 is press-fitted, so that the back surface 44 a side of the terminal connection member 44 expands and the end face of the bolt head 67 engages. A mating engagement surface 44c is formed.

  The terminal connection member 44 has an insertion hole 48 near the other end in the longitudinal direction. The insertion hole 48 penetrates the terminal connection member 44 in the thickness direction. The insertion hole 48 has a circular shape. The connection shaft portion 60 a of the lead terminal 60 is inserted into the insertion hole 48. The connection shaft portion 60a passes through the insertion hole 40a of the inner insulating member 40, the insertion hole 15e of the lid member 15, the insertion hole 57d of the outer insulating member 57, and the insertion hole 48 of the terminal connection member 44.

  The positive terminal structure 16 and the negative terminal structure 17 have a seal ring 73. The connection shaft 60 a of the lead-out terminal 60 is inserted through the seal ring 73. The seal ring 73 is supported by the base 60b of the lead terminal 60. Further, the positive electrode terminal structure 16 and the negative electrode terminal structure 17 have the above-described inner insulating member 40 into which the connecting shaft portion 60a is inserted. The inner insulating member 40 has a square plate shape.

  A seal ring 73 is arranged inside the inner insulating member 40. The inner insulating member 40 covers the base 60b. The inner insulating member 40 regulates contact between the lid member 15 and the lead terminal 60 and insulates the lid member 15 from the lead terminal 60.

  The distal end portion of the connection shaft portion 60a penetrating the insertion hole 48 of the terminal connection member 44 is axially swaged, so that the connection shaft portion 60a and the base portion 60b form the inner insulating member 40, the cover member 15, and the outer insulating member. 57 and the terminal connection member 44 are sandwiched. By this sandwiching, the drawer terminal 60 is fixed to the lid member 15. The seal ring 73 is in close contact with the inner surface 15d of the lid member 15 around the insertion hole 15e, and seals the insertion hole 15e of the lid member 15.

  The distal end of the connecting shaft portion 60a of the lead terminal 60 is locked to the surface of the terminal connecting member 44, and the lead terminal 60 and the terminal connecting member 44 are electrically connected by this locking. The base 60b of the lead terminal 60 contacts the conductive member 51, and the contact connects the lead terminal 60 and the conductive member 51 electrically.

Next, a method of manufacturing the secondary battery 10 will be described together with its operation.
First, the outer insulating member 57 is arranged on the outer surface 15c of the lid member 15 in a state in which the locking projections 18 of the lid member 15 are inserted into the detent recesses 59 of the outer insulating member 57.

  Next, as shown in FIG. 5A, a step of fitting the engaging ridge 54 of the jig 52 into the engaging hole 45 of the terminal connecting member 44 is performed. The jig 52 fits the engagement ridge 54 into the engagement hole 45 until the substrate 53 contacts the back surface 44 a of the terminal connection member 44. By this step, the outer surface of the engaging ridge 54 contacts the entire inner surface of the engaging hole 45.

Next, a step of press-fitting the bolt head 67 of the external connection terminal 66 into the press-fit hole 47 is performed, and the terminal connection member 44 and the external connection terminal 66 are integrated.
Next, as shown in FIG. 5B, a step of removing the engagement protrusion 54 from the engagement hole 45 and removing the jig 52 from the terminal connection member 44 is performed.

  Next, a step of inserting the positioning protrusion 58 of the outer insulating member 57 into the engagement hole 45 of the terminal connection member 44 in which the external connection terminal 66 is press-fitted into the press-fit hole 47 is performed. Then, the terminal connection member 44 is disposed on the surface 57c of the outer insulating member 57.

  Next, the seal ring 73 and the inner insulating member 40 are arranged on the inner surface 15d side of the lid member 15. The connecting shaft portion 60a of the lead terminal 60 is inserted into the insertion hole 40a of the inner insulating member 40, the seal ring 73, the insertion hole 15e of the lid member 15, the insertion hole 57d of the outer insulating member 57, and the insertion hole 48 of the terminal connecting member 44. insert. Then, by caulking the connecting shaft portion 60a of the extraction terminal 60, the inner insulating member 40, the seal ring 73, the lid member 15, the outer insulating member 57, and the inner insulating member 40 are provided between the base portion 60b and the distal end portion of the connecting shaft portion 60a. The terminal connection member 44 is integrated.

  Next, the conductive member 51 is joined to the base 60b of each lead terminal 60. Then, a positive electrode terminal structure 16 and a negative electrode terminal structure 17 are formed on the lid member 15. Then, the tab group 36 having the same polarity is joined to each conductive member 51.

  The electrode assembly 12 is inserted into the case member 14 from the opening 14a of the case member 14. After the electrode assembly 12 is inserted into the case member 14, the lid member 15 is joined to the open end of the case member 14, whereby the secondary battery 10 is manufactured.

According to the above embodiment, the following effects can be obtained.
(1) The external connection terminal 66 is press-fitted into the press-fitting hole 47 in a state where the engaging ridge 54 of the jig 52 is fitted into the engaging hole 45 of the terminal connecting member 44. For this reason, the deformation of the terminal connection member 44 when the external connection terminal 66 is pressed into the press-fit hole 47 can be received by the engaging ridge 54 of the jig 52. Therefore, the deformation of the engaging hole 45 adjacent to the press-fit hole 47 due to the press-fit of the external connection terminal 66 into the press-fit hole 47 can be restricted. As a result, the positioning protrusion 58 of the outer insulating member 57 can be inserted into the engagement hole 45 and the positioning protrusion 58 can be engaged with the engagement hole 45. Therefore, even when the external connection terminal 66 is pressed into the terminal connection member 44, the rotation of the terminal connection member 44 with respect to the outer insulating member 57 can be maintained.

  (2) The engagement hole 45 is a long hole extending in the short direction of the terminal connection member 44, and the engagement protrusion 54 is a long and narrow columnar shape fitted into the engagement hole 45. For this reason, when the external connection terminal 66 is press-fitted into the press-fitting hole 47, even if the terminal connection member 44 is deformed at any position in the short direction, the deformation can be restricted by the engagement ridge 54.

  (3) The outer surface of the engagement protrusion 54 of the jig 52 contacts the entire inner surface of the engagement hole 45. For this reason, when the external connection terminal 66 is press-fitted into the press-fitting hole 47, even if the terminal connecting member 44 is deformed over the entire width direction thereof, the deformation is received by the jig 52 and the deformation of the engagement hole 45 is prevented. Can be regulated.

(4) One jig 52 is fitted into the engagement hole 45. For this reason, the work of fitting the jig 52 into the engagement hole 45 is easier than in the case where the jig 52 is formed of a plurality of divided bodies.
(5) In the jig 52, the dimension L1 in the longitudinal direction of the engagement ridge 54 is slightly smaller than the dimension N1 in the longitudinal direction of the engagement hole 45, and the dimension L2 in the short direction of the engagement ridge 54 is provided. Is slightly smaller than the dimension N2 of the engagement hole 45 in the short direction. Therefore, the terminal connecting member 44 is not deformed by fitting the engaging ridge 54 into the engaging hole 45, and the press-fitting hole 47 is not deformed by fitting the jig 52 into the engaging hole 45.

The above embodiment may be modified as follows.
The jig 52 may be a plurality of divided bodies.
The jig 52 may have a configuration in which the substrate 53 is not provided and only the engagement ridge 54 is provided.

  The locking projection 18 may have a square shape, a rectangular shape, an elliptical shape, or a round shape as viewed from the outer surface 15c of the lid member 15 instead of the ridge shape. When viewed from the outer surface 15c of the lid member 15, the shape may be square, rectangular, elliptical, or round.

The wall may be a side wall of the case member 14 instead of the lid member 15.
The electrode assembly 12 may be of a wound type instead of a stacked type.
The drawer terminal 60 may be directly connected to the tab group 36 without using the conductive member 51.

The power storage device can be applied to a power storage device other than a secondary battery, such as a capacitor.
The positive electrode 21 and the negative electrode 31 may have a structure in which an active material layer exists on one surface of a metal foil.

  The secondary battery 10 may be a lithium ion secondary battery or another secondary battery. The point is that any material can be used as long as ions move between the positive electrode active material and the negative electrode active material and transfer charges.

Next, technical ideas that can be grasped from the above embodiment and other examples will be additionally described below.
(1) A method of manufacturing a power storage device, wherein an outer surface of the jig contacts an entire inner surface of the engagement hole.

  (2) A method for manufacturing a power storage device, wherein the dimension of the jig is slightly smaller than the dimension of the engagement hole.

  DESCRIPTION OF SYMBOLS 10 ... Secondary battery, 11 ... Case, 12 ... Electrode assembly, 15 ... Lid member as a wall part, 21 ... Positive electrode as an electrode, 31 ... Negative electrode as an electrode, 44 ... Terminal connecting member, 45 ... Mating hole, 47 ... Press-fitting hole, 48 ... Inserting hole, 52 ... Jig, 57 ... Outer insulating member, 58 ... Positioning protrusion, 60 ... Extraction terminal, 66 ... External connection terminal.

Claims (3)

An electrode assembly in which electrodes of different polarities are insulated from each other and stacked,
A case containing the electrode assembly;
An external connection terminal disposed outside a wall of the case;
An extraction terminal electrically connected to the electrode assembly and penetrating the wall to protrude outside;
A terminal connection member disposed outside the wall portion and connecting the extraction terminal and the external connection terminal;
An outer insulating member that insulates the external connection terminal and the wall portion outside the wall portion and penetrates the extraction terminal along a direction in which the extraction terminal protrudes from the wall portion,
The outer insulating member has a positioning protrusion having a shape protruding toward the terminal connection member,
The terminal connection member, a press-fit hole into which the external connection terminal is press-fitted,
An insertion hole through which the extraction terminal is inserted,
And an engagement hole with which the positioning projection is engaged,
A method for manufacturing a power storage device, wherein the press-fit hole and the engagement hole are arranged in parallel in a surface direction of the terminal connection member,
A step of press-fitting the external connection terminal into the press-fitting hole with a jig fitted in the engagement hole of the terminal connection member;
Removing the jig from the engagement hole;
Inserting the positioning protrusion of the outer insulating member into the engagement hole of the terminal connection member in which the external connection terminal is press-fitted into the press-fitting hole.   The terminal connection member has a rectangular shape, the surface direction is a longitudinal direction, the engaging hole is a long hole extending in a short direction of the terminal connection member, and the jig is an elongated columnar shape. The method for manufacturing a power storage device according to claim 1, wherein   The method for manufacturing a power storage device according to claim 1, wherein the power storage device is a secondary battery.

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