JP2014006975A - Lid member with terminal, battery, and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid member with terminal in which foreign matter such as metal powder is reduced, and to provide a battery, and manufacturing methods therefor.SOLUTION: The insulation side sidewall 173 of an insulation member (first insulation member 170)has such a form that the lower surface side outer peripheral surfaces 131h, 141h, i.e. the parts on the lower surface 131b, 141b side of pedestal parts 131, 141, out of the outer peripheral side faces 131g, 141g of the pedestal parts 131, 141 of an electrode terminal member (a positive electrode terminal member 130 and a negative electrode terminal member 140), are exposed over the whole circumference of the outer peripheral side faces 131g, 141g. The lower surfaces 131b, 141b and the lower surface side outer peripheral surfaces 131h, 141h of the pedestal parts 131, 141 are located on the outside of the insulation member (first insulation member 170).

Description

  The present invention relates to a lid member with a terminal, a battery, and a method for manufacturing the same.

  Patent Document 1 discloses a box-shaped battery case body having an opening, an electrode body housed inside the battery case body, a plate-shaped battery case lid for closing the opening of the battery case body, and the battery case body. An electrode terminal member that connects to the electrode body inside and extends to the outside through a through hole formed in the battery case lid, and is interposed between the electrode terminal member and the battery case lid, A battery including an insulating member that electrically insulates the battery is disclosed.

JP 2011-23142 A

  More specifically, the electrode terminal member has a plate-like pedestal portion located inside the battery case main body and a columnar shape protruding from the upper surface of the pedestal portion, and is inserted through the through hole of the battery case lid. It has an electrode body connection portion that is electrically connected to the electrode body in a form extending from the lower surface of the insertion portion and the base portion to the bottom surface side of the battery case body. The insulating member has a plate shape having a through-hole through which the insertion portion of the electrode terminal member is inserted, and is insulated between the upper surface of the pedestal portion of the electrode terminal member and the battery case lid. It has an insulating side wall part of the form which surrounds the outer peripheral side surface of the interposition part and the periphery of the said interposition part, and is located in the periphery of the said insulating interposition part.

By the way, in recent years, in the process of manufacturing a battery, an electrode terminal member, a battery case cover, and an insulating member are integrally assembled to form a cover member with a terminal, and then the cover member with a terminal is washed, It is required to remove foreign matters (metal powder and the like) adhering to the member.
However, in the lid member with a terminal disclosed in Patent Document 1, the height of the insulating side wall portion of the insulating member (the dimension in the thickness direction of the base portion of the electrode terminal member) is larger than the thickness of the base portion of the electrode terminal member. It has been enlarged. Thereby, it becomes the form by which the whole base part was accommodated in the inside of an insulating member (it is not exposed outside). For this reason, it has been difficult to properly clean the pedestal and the like.

  Specifically, for example, as shown in FIG. 10, the fluid F (liquid or gas) ejected from the nozzles 11 and 12 is applied to the lower surface 331b of the pedestal portion 331, the insulating side wall portion 373, etc. If one is to clean, one end 331c (the right end in FIG. 10) and the other end 331d (the left end in FIG. 10) of the lower surface 331b of the pedestal 331, the one end inner surface 373c and the other end of the insulating sidewall 373 The inner surface 373d could not be cleaned properly. The reason is that these portions are blind spots by the insulating side wall portion 373, and the ejected fluid F is blocked by the insulating side wall portion 373, and the fluid F cannot be appropriately applied to these portions. is there. For this reason, it has been difficult to properly remove foreign matters such as metal powder in the pedestal portion 331 and the like.

  Further, as shown in FIG. 11, when the fluid F is applied to the lower surface 331b of the pedestal portion 331 and the one end side inner surface 373c and the other end side inner surface 373d of the insulating side wall portion 373 to attempt to clean these portions, the nozzle 11 , 12 collided before reaching the lower surface 331b of the pedestal 331, and could not be cleaned properly.

  Specifically, in order to apply the fluid F to the one end 331c of the lower surface 331b of the pedestal 331 and the one end inner surface 373c of the insulating side wall 373, the nozzle 11 is disposed on the other end 331d side and the other end 331d side is disposed. Therefore, it is necessary to eject the fluid F obliquely toward the one end 331c side. In addition, in order to apply the fluid F to the other end 331d of the lower surface 331b of the pedestal 331 and the inner surface 373d of the other end of the insulating side wall 373, the nozzle 12 is disposed on the one end 331c side and the other end is separated from the one end 331c side. It is necessary to eject the fluid F obliquely toward the end portion 331d side.

  For this reason, the fluid F ejected from the nozzles 11 and 12 collides (at C part in FIG. 11) before reaching the lower surface 331b of the pedestal portion 331, and it is difficult to properly clean the pedestal portion 331 and the like. It was. As a result, it has been difficult to properly remove foreign matters such as metal powder in the pedestal portion 331 and the like. Since the pedestal 331 and the like are parts disposed inside the battery, it has been required to appropriately remove foreign matters such as metal powder.

  This invention is made | formed in view of this present condition, Comprising: It aims at providing the cover member with a terminal in which foreign materials, such as metal powder, were reduced, and these manufacturing methods.

  One aspect of the present invention includes a box-shaped battery case body having an opening, an electrode body housed inside the battery case body, a plate-shaped battery case lid that closes the opening of the battery case body, An electrode terminal member connected to the electrode body inside the battery case body and extending to the outside through a through hole formed in the battery case lid, and interposed between the electrode terminal member and the battery case lid And a lid member with a terminal having an insulating member that electrically insulates them, wherein the electrode terminal member is a plate-like pedestal portion located inside the battery case body, the pedestal A columnar shape projecting from the upper surface of the battery cell, and an insertion portion for inserting the through hole of the battery case lid; and a shape extending from the lower surface of the pedestal portion to the bottom surface side of the battery case body, Connect to A pole body connection portion, and the insulating member has a plate shape having a through hole through which the insertion portion of the electrode terminal member is inserted, and the upper surface of the pedestal portion of the electrode terminal member and the battery case lid An insulating intervening portion interposed between the insulating intervening portion, and an insulating side wall portion positioned at the periphery of the insulating intervening portion, and surrounding the outer peripheral side surface of the pedestal portion. Is configured to expose the lower surface side outer peripheral surface, which is the lower surface side portion of the pedestal portion, of the outer peripheral side surface of the pedestal portion over the entire circumference of the outer peripheral side surface, and the lower surface and the lower surface of the pedestal portion The side outer peripheral side surface is a battery that is positioned outside (outside) the insulating member.

  In the battery described above, the insulating member has an insulating side wall portion that surrounds the outer peripheral side surface of the pedestal portion of the electrode terminal member. For this reason, compared with the case where the insulating member which does not have an insulating side wall part is used, the electrical insulation between the base part of an electrode terminal member and a battery case cover can be maintained more appropriately.

  For example, when an insulating member that does not have an insulating side wall portion is used, a positional shift occurs in the plane direction (direction along the upper surface of the pedestal portion) between the pedestal portion of the electrode terminal member and the insulating member, and the electrode terminal member There is a possibility that the end of the pedestal portion protrudes from the insulating member and the pedestal portion and the battery case lid come into contact with each other. On the other hand, by providing the insulating side wall portion that surrounds the outer peripheral side surface of the pedestal portion of the electrode terminal member, the displacement of the pedestal portion can be limited by the insulating side wall portion (the pedestal portion is stopped inside the insulating side wall portion). Therefore, the electrical insulation between the pedestal of the electrode terminal member and the battery case lid can be reliably maintained.

  Moreover, in the battery described above, the insulating side wall portion exposes the lower surface side portion of the pedestal portion (this portion is referred to as the lower surface side outer peripheral surface) among the outer peripheral side surfaces of the pedestal portion of the electrode terminal member over the entire circumference of the outer peripheral side surface. It has a form. That is, the height of the insulating side wall portion (the dimension in the thickness direction of the pedestal portion) is made smaller than the thickness of the pedestal portion. Thereby, the lower surface of the pedestal and the lower outer peripheral side surface are positioned (exposed) outside the insulating member.

  For this reason, when manufacturing the battery, in the cleaning step of cleaning the lid member with a terminal in which the electrode terminal member, the battery case lid, and the insulating member are integrally assembled, the entire lower surface of the base portion of the electrode terminal member and the outer peripheral side surface Etc. can be washed appropriately. This is because, unlike the conventional lid member with a terminal (see FIG. 10), the insulating side wall portion does not cause the end portion of the lower surface of the pedestal portion to become a blind spot. Thus, the battery described above is a battery in which foreign matter such as metal powder is reduced.

In addition, the outer peripheral side surface of a pedestal part is located between the upper surface and lower surface of a pedestal part, and means the side surface which comprises the outer periphery of a pedestal part.
The outside (outside) of the insulating member refers to the outside of the space surrounded by the insulating member (insulating side wall).
The electrode terminal member may be configured by combining a plurality of members.

  Another aspect of the present invention extends from the lower surface side of the battery case lid to the upper surface side (through the battery case lid) through a plate-shaped battery case lid and a through hole formed in the battery case lid. A terminal-attached lid member comprising: an electrode terminal member having a form; and an insulating member interposed between the electrode terminal member and the battery case lid to electrically insulate the electrode terminal member, A plate-like pedestal portion located on the lower surface side with respect to the battery case lid, a columnar shape protruding from the upper surface of the pedestal portion, an insertion portion for inserting the through hole of the battery case lid, and the pedestal portion An electrode body connection portion that extends downward from the lower surface of the battery case (the side opposite to the side where the battery case lid is located), and the insulating member is a through-hole through which the insertion portion of the electrode terminal member is inserted. It has a plate shape with the above electrode terminals An insulating intervening portion interposed between the upper surface of the pedestal portion of the material and the battery case lid, and an insulating side wall portion positioned at the periphery of the insulating intervening portion, and surrounding the outer peripheral side surface of the pedestal portion The insulating side wall part exposes the lower surface side outer peripheral side surface, which is the lower surface side portion of the pedestal part, of the outer peripheral side surface of the pedestal part over the entire circumference of the outer peripheral side surface. It is a cover member with a terminal which comprises a form and the said lower surface of the said base part and the said lower surface side outer peripheral side surface are located in the exterior of the said insulating member.

  In the above-mentioned lid member with a terminal, the insulating member has an insulating side wall portion that surrounds the outer peripheral side surface of the pedestal portion of the electrode terminal member. For this reason, as in the case of the battery described above, the electrical insulation between the pedestal portion of the electrode terminal member and the battery case lid is more appropriately maintained as compared with the case where an insulating member having no insulating side wall portion is used. Can do.

  Moreover, in the above-mentioned lid member with a terminal, the insulating side wall portion exposes the lower surface side portion (the lower surface side outer peripheral surface) of the pedestal portion of the outer peripheral side surface of the pedestal portion of the electrode terminal member over the entire circumference of the outer peripheral side surface. I am doing. That is, the height of the insulating side wall portion (the dimension in the thickness direction of the pedestal portion) is made smaller than the thickness of the pedestal portion. Thereby, the lower surface of the pedestal and the lower outer peripheral side surface are positioned (exposed) outside the insulating member. For this reason, in the washing | cleaning process which wash | cleans the terminal cover member after an assembly | attachment, the whole lower surface and lower surface side outer peripheral side surface of the base part of an electrode terminal member can be wash | cleaned appropriately. Thus, the above-mentioned lid member with a terminal becomes a lid member with a terminal in which foreign matters such as metal powder are reduced.

  Another aspect of the present invention includes a box-shaped battery case main body having an opening, an electrode body housed inside the battery case main body, a plate-shaped battery case lid that closes the opening of the battery case main body, An electrode terminal member connected to the electrode body inside the battery case body and extending to the outside through a through-hole formed in the battery case lid, and between the electrode terminal member and the battery case lid And a lid member with a terminal having an insulating member for electrically insulating them, wherein the electrode terminal member is a plate-like base located inside the battery case body. The electrode body in a form extending from the bottom surface of the pedestal portion to the bottom surface side of the battery case main body, a columnar shape protruding from the upper surface of the pedestal portion, and an insertion portion for inserting the through hole of the battery case lid. Electrically And the insulating member has a plate shape having a through-hole through which the insertion portion of the electrode terminal member is inserted, and the upper surface of the pedestal portion of the electrode terminal member and the battery An insulating intervening portion interposed between the case lid and an insulating side wall portion located at a peripheral edge of the insulating intervening portion and surrounding the outer peripheral side surface of the pedestal portion. Surrounding the outer peripheral side surface of the pedestal portion by a side wall portion, the insertion portion of the electrode terminal member is inserted into the insulating medium while the insulating interposed portion is interposed between the pedestal portion and the battery case lid. The electrode terminal member, the battery case lid, and the insulating member are integrally assembled so that the through hole of the portion and the through hole of the battery case lid are inserted, and the lid with terminal is formed. Assembly process A step of cleaning the lid member with terminal, wherein the insulating side wall portion is a lower surface of the outer peripheral side surface of the pedestal portion that is a portion of the lower surface side of the pedestal portion. In the battery manufacturing method, the outer peripheral side surface is exposed over the entire periphery of the outer peripheral side surface, and the lower surface and the lower outer peripheral side surface of the pedestal portion are located outside the insulating member.

  In the above-described manufacturing method, in the lid member with terminal formed in the lid assembly step, the insulating side wall portion includes the outer side surface of the pedestal portion of the electrode terminal member on the lower surface side portion (the lower surface side outer side surface) of the pedestal portion. It is configured to be exposed all around the side. That is, the height of the insulating side wall portion (the dimension in the thickness direction of the pedestal portion) is made smaller than the thickness of the pedestal portion. Thereby, the lower surface of the pedestal and the lower outer peripheral side surface are positioned (exposed) outside the insulating member.

  For this reason, in the washing | cleaning process which wash | cleans the terminal cover member, the whole lower surface and lower surface side outer peripheral surface of the base part of an electrode terminal member can be wash | cleaned appropriately. This is because, unlike the conventional lid member with a terminal (see FIG. 10), the insulating side wall portion does not cause the end portion of the lower surface of the pedestal portion to become a blind spot. Thereby, a battery in which foreign matter such as metal powder is reduced can be manufactured.

In addition, as a washing | cleaning process, the process of spraying fluid (liquid or gas) on the lid member with a terminal and washing | cleaning a lid member with a terminal can be mentioned, for example.
Further, in the lid assembling step, in addition to the electrode terminal member, the battery case lid, and the insulating member, other members may be assembled together to form the terminal-attached lid member.

  In another aspect of the present invention, a plate-shaped battery case lid and a through-hole formed in the battery case lid pass through the battery case lid from the lower surface side to the upper surface side. ) An electrode terminal member having an extending form; and an insulating member that is interposed between the electrode terminal member and the battery case lid and electrically insulates the electrode terminal member; The electrode terminal member is a plate-like pedestal portion located on the lower surface side with respect to the battery case lid, a columnar shape protruding from the upper surface of the pedestal portion, and an insertion portion for inserting the through hole of the battery case lid, And an electrode body connecting portion that extends downward from the lower surface of the pedestal portion (the side opposite to the side where the battery case lid is located), and the insulating member is the insertion portion of the electrode terminal member It has a plate shape with a through hole for inserting An insulating intervening portion interposed between the upper surface of the pedestal portion of the electrode terminal member and the battery case lid, and an insulating side wall portion positioned at the periphery of the insulating intervening portion, the outer periphery of the pedestal portion An insulating side wall portion that surrounds the side surface, and the insulating side wall portion surrounds the outer peripheral side surface of the pedestal portion so that the insulating interposed portion is interposed between the pedestal portion and the battery case lid. However, the insertion portion of the electrode terminal member is inserted through the through hole of the insulating interposition portion and the through hole of the battery case lid so that the electrode terminal member, the battery case lid, and the insulation member A lid assembly step for forming the lid member with terminal, and a cleaning step for cleaning the lid member with terminal. In the lid member with terminal, the insulating side wall portion includes the pedestal portion. upon Of the outer peripheral side surfaces, the lower surface side outer peripheral surface, which is the portion on the lower surface side of the pedestal portion, is exposed over the entire circumference of the outer peripheral side surface, and the lower surface and the lower surface side outer peripheral side surface of the pedestal portion are insulated. It is a manufacturing method of the lid member with a terminal located in the exterior of a member.

  In the above-described manufacturing method, in the lid member with terminal formed in the lid assembly step, the insulating side wall portion includes the outer side surface of the pedestal portion of the electrode terminal member on the lower surface side portion (the lower surface side outer side surface) of the pedestal portion. It is configured to be exposed all around the side. That is, the height of the insulating side wall portion (the dimension in the thickness direction of the pedestal portion) is made smaller than the thickness of the pedestal portion. Thereby, the lower surface of the pedestal and the lower outer peripheral side surface are positioned (exposed) outside the insulating member.

  For this reason, in the washing | cleaning process which wash | cleans the terminal cover member, the whole lower surface and lower surface side outer peripheral surface of the base part of an electrode terminal member can be wash | cleaned appropriately. Thereby, the cover member with a terminal by which foreign materials, such as metal powder, were reduced can be obtained.

It is a longitudinal cross-sectional view of the battery concerning embodiment. It is an enlarged view of the B section and C section of FIG. It is a disassembled perspective view of the cover member with a terminal concerning an embodiment. It is a figure explaining the washing | cleaning process concerning embodiment. It is a perspective view of the electrode body concerning an embodiment. It is a figure which shows the positive electrode plate which comprises the same electrode body. It is a figure which shows the negative electrode plate which comprises the same electrode body. It is a figure explaining the process of forming the electrode body. It is a flowchart which shows the flow of the manufacturing method of the battery concerning embodiment. It is a figure explaining the washing | cleaning process concerning a comparison form. It is a figure explaining the other washing | cleaning process concerning a comparison form.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a battery 100 according to the embodiment. FIG. 2 is an enlarged view of a portion B and a portion C in FIG. In addition, about the member different from B part among the members in C part, the code | symbol is written in parenthesis in FIG. FIG. 3 is an exploded perspective view of a part of the lid member with terminal 115 according to the embodiment.

  As shown in FIG. 1, the battery 100 according to the present embodiment includes a rectangular box-shaped battery case body 111 having an opening 111 d and an electrode body 150 accommodated in the battery case body 111. It is a battery. Further, the battery 100 includes a plate-shaped battery case lid 113 that closes the opening 111 d of the battery case main body 111. The battery case main body 111 and the battery case lid 113 are integrated by welding to form a battery case 110.

  The battery case lid 113 has a rectangular plate shape, and circular through holes 113h and 113k penetrating the battery case lid 113 are formed at both ends in the longitudinal direction (left and right direction in FIG. 1). In addition, a safety valve 113j is provided at the center of the battery case lid 113 in the longitudinal direction. The safety valve 113j is formed integrally with the battery case lid 113 and forms a part of the battery case lid 113.

  The safety valve 113j is formed thinner than other portions of the battery case lid 113, and a groove 113jv is formed on the upper surface thereof (see FIG. 3). Thereby, the safety valve 113j operates when the internal pressure inside the battery case 110 reaches a predetermined pressure. That is, when the internal pressure reaches a predetermined pressure, the groove 113jv breaks and releases the gas inside the battery case 110 to the outside.

  Further, a liquid injection port 113n for injecting an electrolytic solution (not shown) into the battery case 110 is formed between the safety valve 113j and the through hole 113k of the battery case lid 113 (see FIG. 1). The liquid injection port 113n is sealed with a liquid injection plug 113m.

  Further, the battery 100 is connected to the electrode body 150 inside the battery case main body 111 and extends to the outside through the through holes 113h and 113k of the battery case lid 113 (the positive terminal member 130 and the negative terminal member 140). ).

  The positive electrode terminal member 130 includes a positive electrode connection member 135, a positive electrode external terminal member 137, and a positive electrode fastening member 139 (bolt) (see FIGS. 1 and 3). Among these, the positive electrode connecting member 135 is made of metal, is connected to the electrode body 150, and extends to the outside through the through hole 113 h of the battery case lid 113. The positive electrode external terminal member 137 is made of metal, is located on the battery case lid 113 (outside the battery case 110), and is electrically connected to the positive electrode connection member 135 outside the battery case 110. The positive electrode fastening member 139 is made of metal, is positioned on the battery case lid 113 (outside of the battery case 110), and is electrically connected (or connectable) to the positive electrode external terminal member 137.

  Specifically, the positive electrode connection member 135 includes a pedestal part 131, an insertion part 132, an electrode body connection part 134, and a caulking part 133 (see FIGS. 1 to 3). Of these, the pedestal 131 has a rectangular plate shape and is located inside the battery case main body 111. The insertion part 132 has a cylindrical shape protruding from the upper surface 131 f of the pedestal part 131 and is inserted through the through hole 113 h of the battery case lid 113. The caulking portion 133 is a portion connected to the upper end of the insertion portion 132, is caulked (deformed so as to expand in diameter), has a disk shape, and is electrically connected to the positive electrode external terminal member 137. . The electrode body connecting portion 134 is welded to the positive electrode mixture layer uncoated portion 151b of the electrode body 150 in a form extending from the lower surface 131b of the pedestal portion 131 to the bottom surface 111b side of the battery case body 111. Thereby, the positive electrode connection member 135 and the electrode body 150 are electrically and mechanically connected.

  The positive external terminal member 137 is made of a metal plate and has a substantially Z shape in side view. The positive external terminal member 137 includes a fixing portion 137f fixed by the crimping portion 133, a connecting portion 137g connected to the positive electrode fastening member 139, and a connecting portion 137h connecting the fixing portion 137f and the connecting portion 137g. ing. A through hole 137b penetrating through the fixing portion 137f is formed, and the insertion portion 132 of the positive electrode connecting member 135 is inserted into the through hole 137b. Further, the connecting portion 137g is also formed with a through hole 137c penetrating therethrough.

  The positive electrode fastening member 139 is a metal bolt, and has a rectangular plate-shaped head portion 139b and a columnar shaft portion 139c. A portion on the tip side of the shaft portion 139c is a screw portion 139d. The shaft portion 139c of the positive electrode fastening member 139 is inserted through the through hole 137c of the positive electrode external terminal member 137.

  The negative electrode terminal member 140 includes a negative electrode connection member 145, a negative electrode external terminal member 147, and a negative electrode fastening member 149 (bolt) (see FIGS. 1 and 3). Among these, the negative electrode connection member 145 is made of metal, is connected to the electrode body 150, and extends to the outside through the through hole 113 k of the battery case lid 113. The negative external terminal member 147 is made of metal, is located on the battery case lid 113 (outside of the battery case 110), and is electrically connected to the negative electrode connection member 145 outside the battery case 110. The negative electrode fastening member 149 is made of metal, is located on the battery case lid 113 (outside of the battery case 110), and is electrically connected (or connectable) to the negative electrode external terminal member 147.

  Specifically, the negative electrode connection member 145 includes a pedestal portion 141, an insertion portion 142, an electrode body connection portion 144, and a caulking portion 143 (see FIGS. 1 to 3). Among these, the pedestal portion 141 has a rectangular plate shape and is located inside the battery case main body 111. The insertion part 142 has a cylindrical shape protruding from the upper surface 141 f of the pedestal part 141, and is inserted through the through hole 113 k of the battery case lid 113. The caulking portion 143 is a portion connected to the upper end of the insertion portion 142, is caulked (deformed so as to expand in diameter), has a disk shape, and is electrically connected to the negative electrode external terminal member 147. . The electrode body connecting portion 144 is welded to the negative electrode mixture layer uncoated portion 158b of the electrode body 150 in a form extending from the lower surface 141b of the pedestal portion 141 toward the bottom surface 111b of the battery case body 111. Thereby, the negative electrode connection member 145 and the electrode body 150 are electrically and mechanically connected.

  The negative external terminal member 147 is made of a metal plate and has a substantially Z shape in side view. The negative external terminal member 147 has a fixing portion 147f fixed by the crimping portion 143, a connecting portion 147g connected to the negative electrode fastening member 139, and a connecting portion 147h connecting the fixing portion 147f and the connecting portion 147g. ing. The fixing portion 147f is formed with a through hole 147b penetrating therethrough, and the insertion portion 142 of the negative electrode connecting member 145 is inserted into the through hole 147b. Further, the connecting portion 147g is also formed with a through hole 147c penetrating therethrough.

  The negative electrode fastening member 149 is a metal bolt, and has a rectangular plate-shaped head portion 149b and a columnar shaft portion 149c. A portion on the tip side of the shaft portion 149c is a screw portion 149d. The shaft portion 149 c of the negative electrode fastening member 149 is inserted through the through hole 147 c of the negative electrode external terminal member 147.

  Further, the battery 100 includes a first insulating member 170 that is interposed between the positive electrode terminal member 130 (specifically, the positive electrode connecting member 135) and the battery case lid 113 and electrically insulates both. The first insulating member 170 is also interposed between the negative electrode terminal member 140 (specifically, the negative electrode connecting member 145) and the battery case lid 113. The first insulating member 170 corresponds to the insulating member recited in the claims.

  Specifically, the first insulating member 170 is made of a resin that is electrically insulating and elastically deformable, and includes an insulating interposition part 171, an insulating side wall part 173, and an insertion part 175 (FIGS. 2 and 2). 3). Among these, the insulation interposition part 171 has a flat plate shape, and has a circular through hole 171b through which the insertion part 132 (insertion part 142) of the positive electrode terminal member 130 (negative electrode terminal member 140) is inserted. Yes. The insulation interposition part 171 is interposed between the upper surface 131 f (upper surface 141 f) of the base part 131 (base part 141) of the positive electrode terminal member 130 (negative electrode terminal member 140) and the battery case lid 113.

  The insulating side wall part 173 is a square annular side wall part located on the periphery of the insulating interposition part 171. The insulating side wall portion 173 surrounds the outer peripheral side surface 131g (outer peripheral side surface 141g) of the pedestal portion 131 (pedestal portion 141). The insertion portion 175 has a cylindrical shape protruding from the upper surface 171f of the insulating interposition portion 171 and is inserted through the through hole 113h (through hole 113k) of the battery case lid 113. The insertion portion 132 of the positive electrode terminal member 130 (the insertion portion 142 of the negative electrode terminal member 140) is inserted into the cylinder of the insertion portion 175.

  Further, the battery 100 includes a second insulating member 180 made of an electrically insulating resin and disposed on the battery case lid 113. The second insulating member 180 is interposed between the positive terminal member 130 (specifically, the positive external terminal member 137 and the positive fastening member 139) and the battery case lid 113, and electrically insulates both. The second insulating member 180 is also interposed between the negative electrode terminal member 140 (specifically, the negative external terminal member 147 and the negative electrode fastening member 149) and the battery case lid 113.

  Specifically, the second insulating member 180 includes a head arrangement portion 181 where the head portion 139b of the positive electrode fastening member 139 (the head portion 149b of the negative electrode fastening member 149) is arranged, and a fixing portion 137f of the positive electrode external terminal member 137. And a fastening arrangement portion 183 in which the (fixing portion 147f of the negative electrode external terminal member 147) is arranged. The fastening arrangement portion 183 is formed with a through hole 183b penetrating therethrough, and the insertion portion 132 of the positive terminal member 130 (the insertion portion 142 of the negative terminal member 140) is inserted into the through hole 183b. Yes.

  In this embodiment, the battery case lid 113, the electrode terminal members (the positive terminal member 130 and the negative terminal member 140), the first insulating members 170 and 170, and the second insulating members 180 and 180 are used as a lid member with a terminal. 115 is configured. Specifically, the positive external terminal member 137, the second insulating member 180, the battery case lid 113, and the first insulating member 170 are sandwiched between the crimped portion 133 and the pedestal portion 131 of the positive electrode terminal member 130. In addition to fixing, the negative electrode external terminal member 147, the second insulating member 180, the battery case lid 113, and the first insulating member 170 are sandwiched between the crimped portion 143 and the pedestal portion 141 of the negative electrode terminal member 140. By doing so, the terminal cover member 115 in which these are integrated is formed.

  In addition, in the lid member with terminal 115, the insulation interposition part 171 of the first insulating member 170 includes the upper surface 131f (upper surface 141f) of the pedestal portion 131 (pedestal portion 141) of the positive electrode terminal member 130 (negative electrode terminal member 140) and the battery case. It is sandwiched between the lid 113 and is elastically compressed and arranged in its own thickness direction (vertical direction in FIG. 2). Further, the insertion portion 175 of the first insulating member 170 is elastically compressed in its own axial direction (vertical direction in FIG. 2), and its tip 175 b is in close contact with the second insulating member 180. In this manner, the through holes 113h and 113k of the battery case lid 113 are sealed by the first insulating member 170.

The electrode body 150 is a flat wound electrode body obtained by winding a belt-like positive electrode plate 155, a negative electrode plate 156, and a separator 157 into a flat shape (see FIGS. 5 to 8).
As shown in FIG. 6, the positive electrode plate 155 has a strip shape extending in the longitudinal direction DA, and includes a positive electrode base material 151 made of aluminum foil, and a positive electrode mixture layer 152 disposed on a part of the surface of the positive electrode base material 151. have. The positive electrode mixture layer 152 includes a positive electrode active material 153, a conductive material made of acetylene black, and PVDF (binder).

  A portion of the positive electrode base material 151 where the positive electrode mixture layer 152 is coated is referred to as a positive electrode mixture layer coating portion 151c. On the other hand, a portion where the positive electrode mixture layer 152 is not coated is referred to as a positive electrode mixture layer uncoated portion 151b. The positive electrode mixture layer uncoated portion 151b is located at the end portion (left end portion in FIG. 6) of the positive electrode base material 151 (positive electrode plate 155) in the width direction DB (left and right direction in FIG. 6), and the positive electrode base material 151 ( Along the one long side of the positive electrode plate 155), the positive electrode base material 151 (positive electrode plate 155) extends in a strip shape in the longitudinal direction DA.

  Further, as shown in FIG. 7, the negative electrode plate 156 has a strip shape extending in the longitudinal direction DA, a negative electrode base material 158 made of copper foil, and a negative electrode mixture layer disposed on a part of the surface of the negative electrode base material 158. 159. The negative electrode mixture layer 159 includes a negative electrode active material 154, SBR (binder), and CMC (thickening agent).

  A portion of the negative electrode base material 158 where the negative electrode mixture layer 159 is coated is referred to as a negative electrode mixture layer coating portion 158c. On the other hand, a portion of the negative electrode base material 158 where the negative electrode mixture layer 159 is not coated is referred to as a negative electrode mixture layer uncoated portion 158b. The negative electrode mixture layer uncoated portion 158b is strip-shaped in the longitudinal direction DA (vertical direction in FIG. 7) of the negative electrode substrate 158 (negative electrode plate 156) along one long side of the negative electrode substrate 158 (negative electrode plate 156). It extends to.

  By the way, in the battery 100 of this embodiment, the 1st insulation member 170 is the insulation of the form which surrounds the outer peripheral side surface 131g (outer peripheral side surface 141g) of the base part 131 (base part 141) of the positive electrode terminal member 130 (negative electrode terminal member 140). A side wall 173 is provided (see FIG. 2). For this reason, compared with the case where the insulating member which does not have an insulating side wall part is used, the electrical insulation between a base part and a battery case cover can be maintained more appropriately.

  Specifically, when the first insulating member that does not have the insulating side wall portion is used, a positional deviation occurs in the planar direction (the direction along the upper surface of the pedestal portion) between the pedestal portion and the first insulating member. In this case, the end of the pedestal portion may protrude from the first insulating member, and the pedestal portion and the battery case lid may come into contact with each other. On the other hand, as in this embodiment, by providing the insulating side wall portion 173 that surrounds the outer peripheral side surface 131g (outer peripheral side surface 141g) of the pedestal portion 131 (pedestal portion 141), the pedestal portion 131 ( The positional deviation of the pedestal part 141) (for example, the positional deviation in the left-right direction in FIG. 2) can be limited (the pedestal parts 131 and 141 can be stopped inside the insulating side wall part 173). Thereby, the electrical insulation between the base part 131 (base part 141) and the battery case cover 113 can be reliably maintained.

  Moreover, in the battery 100 of the present embodiment, the insulating side wall portion 173 has a portion on the lower surface 131b side of the pedestal portion 131 of the outer peripheral side surface 131g of the pedestal portion 131 of the positive electrode terminal member 130 (this portion is referred to as a lower surface side outer peripheral side surface 131h). Is exposed over the entire circumference of the outer peripheral side surface 131g. That is, the height dimension of the insulating side wall part 173 (the dimension in the thickness direction of the pedestal part 131, the vertical dimension in FIG. 2) is made smaller than the thickness of the pedestal part 131. Similarly, on the negative electrode terminal member 140 side, the insulating side wall portion 173 has a portion on the lower surface 141b side of the pedestal portion 141 of the outer peripheral side surface 141g of the pedestal portion 141 (this portion is referred to as a lower surface side outer peripheral side surface 141h). It is configured to be exposed all around.

  Thereby, the lower surfaces 131b and 141b and the lower surface side outer peripheral side surfaces 131h and 141h of the pedestals 131 and 141 are positioned (exposed) outside the first insulating member 170. Note that the outside of the first insulating member 170 refers to the outside of the space surrounded by the first insulating member 170 (specifically, the insulating side wall portion 173), and from the lower end surface 173b of the insulating side wall portion 173 in FIG. Is also down.

  For this reason, as will be described later, in the cleaning step of cleaning the terminal-equipped lid member 115, the lower surfaces 131b and 141b and the lower-surface-side outer peripheral surfaces 131h and 141h of the pedestals 131 and 141 can be appropriately cleaned. Thus, the battery 100 of this embodiment is a battery in which foreign substances such as metal powder are reduced.

  Further, in the battery 100 of the present embodiment, on the lower surface 113b side of the battery case lid 113, a portion located around the through hole 113h is recessed in a rectangular shape to form a recess 113c, and around the through hole 113k. The part to be positioned is also recessed in a rectangular shape to form a recess 113d (see FIG. 2). Furthermore, the insulating interposition part 171 and the insulating side wall part 173 of the first insulating member 170 are disposed inside the recesses 113c and 113d, and the positive electrode connecting member 135 ( A pedestal part 131 (pedestal part 141) of the negative electrode connecting member 145) is arranged.

Next, the manufacturing method of the cover member with a terminal concerning this embodiment and the manufacturing method of a battery are demonstrated.
First, the manufacturing method of the terminal cover member 115 will be described. As shown in FIG. 9, in step S1 (lid assembly step), the terminal-attached lid member 115 is assembled. Specifically, a rectangular plate-shaped battery case lid 113 is prepared. At this time, the liquid inlet 113n of the battery case lid 113 is not sealed by the liquid stopper 113m (the liquid stopper 113m is not attached).

  In addition, a positive electrode connection member 135, a positive electrode external terminal member 137, and a positive electrode fastening member 139 are prepared. Also, a negative electrode connection member 145, a negative electrode external terminal member 147, and a negative electrode fastening member 149 are prepared. Further, two first insulating members 170 and two second insulating members 180 are prepared. At this time, the caulking portion 133 of the positive electrode connecting member 135 and the caulking portion 143 of the negative electrode connecting member 145 are before being caulked, and thus have a cylindrical shape (see the caulking portion 143 in FIG. 3).

  Next, these members are assembled together. Specifically, first, the caulking portion 133 and the insertion portion 132 of the positive electrode connection member 135 are arranged from the front end side thereof through the through hole 171b of the first insulating member 170, the through hole 113h of the battery case lid 113, and the second insulating member. The through-hole 183b of 180 and the through-hole 137b of the positive electrode external terminal member 137 are inserted in this order. At this time, the insulating interposition part 171 is placed between the base part 131 and the battery case lid 113 so that the insulating side wall part 173 of the first insulating member 170 surrounds the outer peripheral side surface 131g of the base part 131 of the positive electrode connecting member 135. It is interposed in between. Prior to this, the head portion 139b of the positive electrode fastening member 139 is disposed in the head arrangement portion 181 of the second insulating member 180, and the shaft portion 139c of the positive electrode fastening member 139 is disposed on the positive electrode external terminal member 137. It is inserted through the through hole 137c.

  Thereafter, the caulking portion 133 (in this case, the columnar shape) of the positive electrode connecting member 135 is expanded radially outward while being crushed downward (on the pedestal portion 131 side). As a result, the caulking portion 133 is deformed into a disk shape, and the positive external terminal member 137, the second insulating member 180, the battery case lid 113, and the first insulation are provided between the caulking portion 133 and the pedestal portion 131. The member 170 is sandwiched and fixed.

  Further, the caulking portion 143 and the insertion portion 142 of the negative electrode connecting member 145 are arranged from the front end side thereof through the through hole 171b of the first insulating member 170, the through hole 113k of the battery case lid 113, and the through hole 183b of the second insulating member 180. The negative external terminal member 147 is inserted through the through hole 147b in this order. At this time, the insulating interposition part 171 is placed between the base part 141 and the battery case lid 113 so that the insulating side wall part 173 of the first insulating member 170 surrounds the outer peripheral side surface 141g of the base part 141 of the negative electrode connecting member 145. It is interposed in between. Prior to this, the head portion 149b of the negative electrode fastening member 149 is disposed in the head portion 181 of the second insulating member 180, and the shaft portion 149c of the negative electrode fastening member 149 is disposed on the negative electrode external terminal member 147. It is made to pass through the through hole 147c.

  Thereafter, the caulking portion 143 (in this case, the columnar shape) of the negative electrode connecting member 145 is expanded radially outward while being crushed downward (on the pedestal portion 141 side). As a result, the caulking portion 143 is deformed into a disk shape, and the negative external terminal member 147, the second insulating member 180, the battery case lid 113, and the first insulating member are interposed between the caulking portion 143 and the base portion 131. The member 170 is sandwiched and fixed. Thus, the battery case lid 113, the positive electrode connecting member 135, the positive electrode external terminal member 137, the positive electrode fastening member 139, the negative electrode connecting member 145, the negative electrode external terminal member 147, the negative electrode fastening member 149, The first insulating members 170 and 170 and the second insulating members 180 and 180 are assembled together to form the terminal cover member 115.

  Next, it progresses to step S2 (washing | cleaning process), and the lid member 115 with a terminal formed as mentioned above is wash | cleaned. Specifically, as shown in FIG. 4, the fluid F (water in this embodiment) ejected from the nozzles 11, 12, etc. is applied to the terminal cover member 115 to clean the terminal cover member 115. Of the lid member with terminal 115, the lower surface 131b of the pedestal 131 and the vicinity thereof are cleaned by applying the fluid F ejected from the nozzles 11 and 12 (washing out foreign matters such as metal powder). Although not shown, a number of nozzles other than the nozzles 11 and 12 are disposed above and below the terminal cover member 115 so that the fluid F is sprayed over the entire terminal cover member 115. Yes.

  By the way, in the conventional lid member with terminal 315, as shown in FIG. 10, when the fluid F ejected from the nozzles 11 and 12 is applied to the lower surface 331b of the pedestal portion 331 and its vicinity, the pedestal portion 331 is cleaned. The one end 331c (the right end in FIG. 10) and the other end 331d (the left end in FIG. 10) of the lower surface 331b, the one end side inner surface 373c and the other end side inner surface 373d of the insulating side wall 373 can be appropriately cleaned. There wasn't. The reason is that these portions are blind spots by the insulating side wall portion 373, and the fluid F ejected by the insulating side wall portion 373 is blocked, and the fluid F cannot be appropriately applied to these portions. is there.

  On the other hand, in step S1 (lid assembly process) of the present embodiment, the insulating side wall portion 173 of the first insulating member 170 is the lower surface 131b of the pedestal portion 113 of the outer peripheral side surface 131g of the pedestal portion 113 as the lid member with terminals. The terminal-side cover member 115 is formed in such a manner that the portion on the side (the lower surface side outer peripheral side surface 131h) is exposed over the entire outer periphery side surface 131g. That is, the height of the insulating side wall part 173 (the dimension in the thickness direction of the pedestal part 131, the dimension in the vertical direction in FIG. 4) is made smaller than the thickness of the pedestal part 131. As a result, the lower surface 131 b and the lower surface side outer peripheral side surface 131 h of the pedestal part 131 are positioned (exposed) outside the first insulating member 170.

  For this reason, in step S2 (cleaning step), the entire lower surface 131b of the pedestal 131 of the positive electrode connection member 135, the lower outer peripheral side surface 131h, and the exposed surface of the insulating sidewall 173 of the first insulating member 170 are appropriately Can be washed. Unlike the conventional lid member with a terminal 315 (see FIG. 10), there are no blind spots due to the insulating side wall, so that the entire lower surface 131 b and the lower outer peripheral side surface 131 h of the pedestal 131 and the first insulating member 170 are insulated. This is because the fluid F can be reliably applied to the exposed surface of the side wall portion 173. Moreover, also on the pedestal part 141 side of the negative electrode connection member 145, it is possible to clean appropriately, similarly to the pedestal part 131 side of the positive electrode connection member 135 described above. Thereby, the cover member with a terminal by which foreign materials, such as metal powder, were reduced can be obtained. Accordingly, foreign matters (metal powder or the like) mixed in the battery can be reduced.

  Then, it progresses to step S3 (electrode body formation process), and the electrode body 150 is formed. Specifically, first, a positive electrode mixture layer 152 containing a positive electrode active material 153 is formed on the surface of a positive electrode base material 151 made of a strip-shaped aluminum foil, to obtain a positive electrode plate 155 (see FIG. 6). In addition, a negative electrode mixture layer 159 including a negative electrode active material 154 is formed on the surface of a negative electrode base material 158 made of a strip-shaped copper foil to obtain a negative electrode plate 156 (see FIG. 7).

  Thereafter, the negative electrode plate 156, the separator 157, the positive electrode plate 155, and the separator 157 are wound so as to overlap in this order (see FIG. 8). Specifically, the positive electrode mixture layer uncoated portion 151b of the positive electrode plate 155 and the negative electrode mixture layer uncoated portion 158b of the negative electrode plate 156 are positioned on opposite sides in the width direction (left and right direction in FIG. 8). In this manner, the negative electrode plate 156, the separator 157, the positive electrode plate 155, and the separator 157 are wound into a flat shape to form the electrode body 150 (see FIG. 5). The number of wrinkles is, for example, 30.

  Next, it progresses to step S4 (welding process), and the electrode body connection part 134 of the positive electrode connection member 135 is welded to the positive electrode mixture layer uncoated part 151b of the electrode body 150. FIG. Further, the electrode body connecting portion 144 of the negative electrode connecting member 145 is welded to the negative electrode mixture layer uncoated portion 158 b of the electrode body 150. Accordingly, the positive terminal member 130 and the positive electrode plate 155 are electrically connected, the negative electrode terminal member 140 and the negative electrode plate 156 are electrically connected, and the terminal cover member 115 and the electrode body 150 are integrated. To.

  Next, the process proceeds to step S5 (accommodating step), in which the electrode body 150 is accommodated inside the battery case main body 111, and the opening 111d of the battery case main body 111 is closed by the battery case lid 113. In this state, it progresses to step S6 (sealing process), and the battery case cover 113 and the battery case main body 111 are joined by all-around welding.

  Thereafter, the process proceeds to step S7 (injection step), and an electrolyte (not shown) is injected into the battery case body 111 through the injection port 113n of the battery case lid 113, and this electrolyte is introduced into the electrode body 150. Impregnate. Next, the liquid inlet 113n of the battery case lid 113 is sealed with a liquid stopper 113m. Thereafter, by performing a predetermined process, the battery 100 (see FIG. 1) of the present embodiment is completed.

  In the above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above embodiments, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof.

DESCRIPTION OF SYMBOLS 100 Battery 110 Battery case 111 Battery case main body 111d Opening 111b Bottom face 113 Battery case cover 113h, 113k Through-hole 115 Lid member 130 with terminal Positive electrode terminal member (electrode terminal member)
131, 141 Pedestal part 131b, 141b Lower surface 131g, 141g Outer peripheral side surface 131h, 141h Lower side outer peripheral side surface 132, 142 Insertion part 133, 143 Clamping part 134, 144 Electrode body connection part 135 Positive electrode connection member 137 Positive electrode external terminal member 139 Positive electrode Fastening member 140 Negative electrode terminal member (electrode terminal member)
145 Negative electrode connecting member 147 Negative external terminal member 149 Negative electrode fastening member 150 Electrode body 155 Positive electrode plate 156 Negative electrode plate 157 Separator 170 First insulating member 171 Insulating interposed portion 171b Through hole 173 Insulating side wall portion F Fluid

Claims (4)

A box-shaped battery case body having an opening;
An electrode body housed inside the battery case body;
A plate-shaped battery case lid for closing the opening of the battery case body;
An electrode terminal member that connects to the electrode body inside the battery case body and extends to the outside through a through hole formed in the battery case lid, and
A terminal cover member having an insulating member interposed between the electrode terminal member and the battery case cover and electrically insulating them,
The electrode terminal member is
A plate-like pedestal located inside the battery case body,
A columnar shape protruding from the upper surface of the pedestal portion, an insertion portion for inserting the through hole of the battery case lid, and
In a form extending from the lower surface of the pedestal portion to the bottom surface side of the battery case body, the electrode body connection portion electrically connected to the electrode body,
The insulating member is
A plate-like shape having a through-hole through which the insertion portion of the electrode terminal member is inserted, an insulating interposition portion interposed between the upper surface of the pedestal portion of the electrode terminal member and the battery case lid; and
An insulating side wall located at the periphery of the insulating interposition part, the insulating side wall having a form surrounding the outer peripheral side surface of the pedestal,
The insulating side wall portion is configured to expose a lower surface side outer peripheral surface that is a portion on the lower surface side of the pedestal portion of the outer peripheral side surface of the pedestal portion over the entire circumference of the outer peripheral side surface,
The battery in which the lower surface and the lower outer peripheral side surface of the pedestal are located outside the insulating member. A plate-shaped battery case lid;
An electrode terminal member configured to extend from the lower surface side to the upper surface side of the battery case cover through a through-hole formed in the battery case cover;
An interposing member interposed between the electrode terminal member and the battery case lid, and electrically insulating them;
The electrode terminal member is
A plate-like pedestal located on the lower surface side with respect to the battery case lid;
A columnar shape protruding from the upper surface of the pedestal portion, an insertion portion for inserting the through hole of the battery case lid, and
An electrode body connecting portion having a form extending downward from the lower surface of the pedestal portion,
The insulating member is
A plate-like shape having a through-hole through which the insertion portion of the electrode terminal member is inserted, an insulating interposition portion interposed between the upper surface of the pedestal portion of the electrode terminal member and the battery case lid; and
An insulating side wall located at the periphery of the insulating interposition part, the insulating side wall having a form surrounding the outer peripheral side surface of the pedestal,
The insulating side wall portion is configured to expose a lower surface side outer peripheral surface that is a portion on the lower surface side of the pedestal portion of the outer peripheral side surface of the pedestal portion over the entire circumference of the outer peripheral side surface,
The terminal-attached lid member in which the lower surface and the lower-surface-side outer peripheral surface of the pedestal portion are located outside the insulating member. A box-shaped battery case body having an opening;
An electrode body housed inside the battery case body;
A plate-shaped battery case lid for closing the opening of the battery case body;
An electrode terminal member that connects to the electrode body inside the battery case body and extends to the outside through a through hole formed in the battery case lid, and
A terminal-attached lid member having an insulating member interposed between the electrode terminal member and the battery case lid and electrically insulating them,
The electrode terminal member is
A plate-like pedestal located inside the battery case body,
An insertion part for inserting the through hole of the battery case lid in a column shape protruding from the upper surface of the pedestal part; and
An electrode body connecting portion electrically connected to the electrode body in a form extending from the bottom surface of the pedestal portion to the bottom surface side of the battery case body,
The insulating member is
A plate-like shape having a through-hole through which the insertion portion of the electrode terminal member is inserted, an insulating interposition portion interposed between the upper surface of the pedestal portion of the electrode terminal member and the battery case lid; and
An insulating side wall located at the periphery of the insulating interposition part, the insulating side wall having a form surrounding the outer peripheral side surface of the pedestal,
The insertion portion of the electrode terminal member is inserted between the pedestal portion and the battery case lid so that the insulating sidewall surrounds the outer peripheral side surface of the pedestal portion, The electrode terminal member, the battery case lid, and the insulating member are assembled together to form the terminal cover member so that the through hole of the insulating intermediate portion and the through hole of the battery case lid are inserted. A lid assembly process,
A cleaning step of cleaning the lid member with terminal,
The said cover member with a terminal WHEREIN: The said insulating side wall part exposes the lower surface side outer peripheral side which is a part of the said lower surface side of the said base part among the said outer peripheral side surfaces of the said base part over the perimeter of the said outer peripheral side surface. None, The manufacturing method of the battery in which the said lower surface and the said lower surface side outer peripheral side of the said base part are located in the exterior of the said insulating member. A plate-shaped battery case lid;
An electrode terminal member configured to extend from the lower surface side to the upper surface side of the battery case cover through a through-hole formed in the battery case cover;
An interposing member interposed between the electrode terminal member and the battery case lid, and electrically insulating them,
The electrode terminal member is
A plate-like pedestal located on the lower surface side with respect to the battery case lid;
A columnar shape protruding from the upper surface of the pedestal portion, an insertion portion for inserting the through hole of the battery case lid, and
An electrode body connecting portion having a form extending downward from the lower surface of the pedestal portion,
The insulating member is
A plate-like shape having a through-hole through which the insertion portion of the electrode terminal member is inserted, an insulating interposition portion interposed between the upper surface of the pedestal portion of the electrode terminal member and the battery case lid; and
An insulating side wall located at the periphery of the insulating interposition part, the insulating side wall having a form surrounding the outer peripheral side surface of the pedestal,
The insertion portion of the electrode terminal member is inserted between the pedestal portion and the battery case lid so that the insulating sidewall surrounds the outer peripheral side surface of the pedestal portion, The electrode terminal member, the battery case lid, and the insulating member are assembled together to form the terminal cover member so that the through hole of the insulating intermediate portion and the through hole of the battery case lid are inserted. A lid assembly process,
A cleaning step of cleaning the lid member with terminal,
The said cover member with a terminal WHEREIN: The said insulating side wall part exposes the lower surface side outer peripheral side which is a part of the said lower surface side of the said base part among the said outer peripheral side surfaces of the said base part over the perimeter of the said outer peripheral side surface. None, The manufacturing method of the lid member with a terminal in which the said lower surface and the said lower surface side outer peripheral side of the said base part are located in the exterior of the said insulating member.

Images