JP6318829B2 - Power storage device manufacturing method and power storage device - Google Patents
Power storage device manufacturing method and power storage device Download PDFInfo
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- JP6318829B2 JP6318829B2 JP2014096044A JP2014096044A JP6318829B2 JP 6318829 B2 JP6318829 B2 JP 6318829B2 JP 2014096044 A JP2014096044 A JP 2014096044A JP 2014096044 A JP2014096044 A JP 2014096044A JP 6318829 B2 JP6318829 B2 JP 6318829B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Description
本発明は、電極端子がケースの壁部に締結固定されている蓄電装置の製造方法、及び蓄電装置に関するものである。 The present invention relates to a method for manufacturing a power storage device in which an electrode terminal is fastened and fixed to a wall portion of a case, and the power storage device.
ＥＶ（Electric Vehicle）やＰＨＶ（Plug in Hybrid Vehicle）などの車両には、原動機となる電動機への供給電力を蓄える蓄電装置としてリチウムイオン電池などの二次電池が搭載されている。この種の二次電池は、例えば、特許文献１に開示されている。 A vehicle such as an EV (Electric Vehicle) or a PHV (Plug in Hybrid Vehicle) is equipped with a secondary battery such as a lithium ion battery as a power storage device that stores power supplied to an electric motor serving as a prime mover. This type of secondary battery is disclosed in Patent Document 1, for example.
図１６に示すように、特許文献１の二次電池は、円筒状のケース２０１内に電極組立体２０２を捲回させた状態で収容している。この電極組立体２０２は、正極電極２０３と負極電極２０４の間にセパレータ２０５を介在させた層状になっている。そして、正極電極２０３及び負極電極２０４からはタブ２０６がそれぞれ引き出され、同極のタブ２０６が複数集められて電極端子２０７に接続されている。なお、図１６では、複数のタブ２０６のうちで、一部のタブ２０６と電極端子２０７とが接続した状態を示しており、その他のタブ２０６と電極端子２０７とが接続した状態は図示を省略している。 As shown in FIG. 16, the secondary battery of Patent Document 1 is housed in a state where the electrode assembly 202 is wound in a cylindrical case 201. The electrode assembly 202 has a layered structure in which a separator 205 is interposed between a positive electrode 203 and a negative electrode 204. Tabs 206 are drawn out from the positive electrode 203 and the negative electrode 204, and a plurality of tabs 206 having the same polarity are collected and connected to the electrode terminal 207. Note that FIG. 16 shows a state in which some of the tabs 206 are connected to the electrode terminals 207, and other tabs 206 and the electrode terminals 207 are not shown. doing.
電極端子２０７は、鍔部２０８と同鍔部２０８から突出して形成された極柱部２０９とを有し、極柱部２０９はその外周面の全体に雄ねじが形成されている。この電極端子２０７は、極柱部２０９がケース２０１の挿通孔２１０に挿通した状態であり且つ極柱部２０９の先端が同ケース２０１外部に突出した状態でケース２０１に取り付けられている。 The electrode terminal 207 has a flange portion 208 and a pole column portion 209 formed so as to protrude from the flange portion 208, and the pole column portion 209 has a male screw formed on the entire outer peripheral surface thereof. The electrode terminal 207 is attached to the case 201 in a state where the pole column portion 209 is inserted into the insertion hole 210 of the case 201 and the tip end of the pole column portion 209 protrudes outside the case 201.
ケース２０１の挿通孔２１０には、電気絶縁性を有する材料（例えばポリプロピレン）により形成された絶縁部材２１１が取着されている。特許文献１に記載の二次電池では、この絶縁部材２１１が、ケース２０１と電極端子２０７との間を電気的に絶縁するための部材として機能するほか、ケース２０１と電極端子２０７との間をシールするためのシール部材としても機能する。 An insulating member 211 made of an electrically insulating material (for example, polypropylene) is attached to the insertion hole 210 of the case 201. In the secondary battery described in Patent Document 1, the insulating member 211 functions as a member for electrically insulating the case 201 and the electrode terminal 207, and between the case 201 and the electrode terminal 207. It also functions as a sealing member for sealing.
そして、電極端子２０７の極柱部２０９には、ケース２０１の外側から、第１ナット２１３及び第２ナット２１４が螺合されている。ワッシャ２１２を介して第１ナット２１３を締付けることにより、電極端子２０７の鍔部２０８とワッシャ２１２とによって絶縁部材２１１が挟持されて同絶縁部材２１１のシール性が高められている。なお、第２ナット２１４は、例えば第２ナット２１４を締付けることによって第１ナット２１３と第２ナット２１４との間にバスバー等を挟持するといったように、外部回路との接続に利用される。 A first nut 213 and a second nut 214 are screwed into the pole column portion 209 of the electrode terminal 207 from the outside of the case 201. By tightening the first nut 213 via the washer 212, the insulating member 211 is held between the flange 208 of the electrode terminal 207 and the washer 212, and the sealing performance of the insulating member 211 is enhanced. The second nut 214 is used for connection to an external circuit, for example, by clamping the second nut 214 to hold a bus bar or the like between the first nut 213 and the second nut 214.
ところで、特許文献１の二次電池では、第１ナット２１３や第２ナット２１４を極柱部２０９の雄ねじに螺合して締付ける際に、その締付けトルクによっては、電極端子２０７が第１ナット２１３や第２ナット２１４とともに回転する現象、いわゆる連れ回りが生じてしまうおそれがある。この場合、電極端子２０７とタブ２０６との接続部分の内部応力が大きくなるため、同部分の破断を招くなど、種々の不都合を招くおそれがある。 By the way, in the secondary battery of Patent Document 1, when the first nut 213 or the second nut 214 is screwed into the male screw of the pole post 209 and tightened, the electrode terminal 207 may be connected to the first nut 213 depending on the tightening torque. There is a possibility that a phenomenon of rotating together with the second nut 214, that is, a so-called rotation will occur. In this case, since the internal stress of the connection portion between the electrode terminal 207 and the tab 206 is increased, there is a possibility that various inconveniences such as breakage of the same portion may be caused.
この発明は、上記従来技術に存在する問題点に着目してなされたものであり、その目的は、電極端子へのナットやボルトの螺合に際して同電極端子の連れ回りを抑えることができる蓄電装置の製造方法、及び蓄電装置を提供することにある。 The present invention has been made paying attention to the problems existing in the above-described prior art, and the purpose thereof is a power storage device capable of suppressing the rotation of the electrode terminal when the nut or bolt is screwed to the electrode terminal. It is in providing the manufacturing method of this, and an electrical storage apparatus.
以下、上記課題を達成するための蓄電装置の製造方法は、内部と外部とを連通する挿通孔を有するケースと、少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、前記ケースの外方から前記極柱部に締結される締結部材と、前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える蓄電装置に適用される。この製造方法では、前記ケースとして、前記介設部材が重なる部分に凹部が形成されたものを用い、前記介設部材として、前記ケースに重なる部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有する形状のものを用いる。そして、前記ケース内における前記挿通孔の周縁と前記電極端子の前記鍔部との間に前記介設部材を配置した状態で前記締結部材を前記極柱部に締結して、前記ケースと前記電極端子とを締結固定する固定工程を含む。 Hereinafter, a method of manufacturing a power storage device for achieving the above-described object includes a case having an insertion hole that allows communication between the inside and the outside, and a flange portion that is at least partially larger than the inner diameter of the insertion hole. It has a pole column part, is a state where the collar part is arranged in the case, and is a state where the pole column part is inserted through the insertion hole, and the tip of the pole column part protrudes outside the case An electrode terminal provided in the case in a state in which the case is made, a fastening member fastened to the pole column portion from the outside of the case, and at least a portion between the periphery of the insertion hole and the flange portion in the case Is applied to a power storage device. In this manufacturing method, a case in which a recess is formed in a portion where the interposition member overlaps is used as the case, and a portion that overlaps the case does not overlap the recess and a portion that overlaps the case as the interposition member. A shape having a portion is used. And the said fastening member is fastened to the said pole column part in the state which has arrange | positioned the said interposed member between the periphery of the said insertion hole in the said case, and the said collar part of the said electrode terminal, The said case and the said electrode A fixing step of fastening and fixing the terminal;
上記製造方法によれば、ケースと電極端子とを締結固定する固定工程において、ケースにおける挿通孔の周縁と電極端子の鍔部との間で介設部材が挟持されるため、ケースと介設部材との接触面の面圧が高くなる。そのため、介設部材の上記ケースに重なる部分における同ケースの凹部に重ならない部分（非オーバーラップ部分）を同凹部に重なる部分（オーバーラップ部分）と比較して窪むように変形させることができる。これにより、介設部材における非オーバーラップ部分とオーバーラップ部分との境界に段差を形成することができ、その段差と上記ケースの凹部とを係合させることができる。したがって、この段差と凹部との係合を通じてケースと介設部材との相対回転を抑えることができ、電極端子へのナットやボルトの螺合に際して、それらナットやボルトと共に電極端子がケースに対して相対回転することを抑えることができる。 According to the manufacturing method, in the fixing step of fastening and fixing the case and the electrode terminal, the interposed member is sandwiched between the periphery of the insertion hole in the case and the flange portion of the electrode terminal. The contact pressure on the contact surface becomes higher. Therefore, a portion (non-overlap portion) that does not overlap the concave portion of the case in the portion of the interposed member that overlaps the case can be deformed so as to be recessed as compared with a portion (overlap portion) that overlaps the concave portion. Thereby, a level | step difference can be formed in the boundary of the non-overlap part and overlap part in an interposed member, and the level | step difference and the recessed part of the said case can be engaged. Therefore, the relative rotation between the case and the interposed member can be suppressed through the engagement between the step and the recess, and when the nut or bolt is screwed to the electrode terminal, the electrode terminal together with the nut or bolt is in contact with the case. Relative rotation can be suppressed.
上記製造方法において、前記凹部は、その開口端と前記介設部材の前記ケースに重なる部分の外縁端が交差する形状に形成されることが好ましい。
上記製造方法によれば、介設部材が非オーバーラップ部分とオーバーラップ部分とを有する形状であるため、固定工程において、介設部材の前記ケースに重なる部分のうちの上記非オーバーラップ部分を上記オーバーラップ部分と比較して窪むように変形させることができる。
In the manufacturing method, the recess is preferably formed in a shape in which an opening end thereof and an outer edge of a portion of the interposed member that overlaps the case intersect.
According to the manufacturing method, since the interposed member has a shape having a non-overlap portion and an overlap portion, in the fixing step, the non-overlapping portion of the portion of the interposed member that overlaps the case is It can deform | transform so that it may become depressed compared with an overlap part.
上記製造方法において、前記凹部は、その開口端が前記挿通孔の周囲を囲う形状に形成され、前記介設部材は、前記極柱部が挿通される貫通孔が形成され、前記ケースに重なる部分の外縁端が前記貫通孔の周囲を囲う形状に形成されることが好ましい。 In the above manufacturing method, the recess has a shape in which an opening end surrounds the periphery of the insertion hole, and the interposed member has a through hole through which the pole column portion is inserted, and overlaps the case It is preferable that the outer edge of the outer periphery of the through hole is formed in a shape surrounding the through hole.
上記製造方法によれば、介設部材における非オーバーラップ部分とオーバーラップ部分との境界を極柱部の周囲で延びる形状で配置することができるため、同境界に形成される段差と上記ケースの凹部との係合を通じて同ケースと介設部材との相対回転を好適に抑えることができる。 According to the manufacturing method, since the boundary between the non-overlap portion and the overlap portion of the interposed member can be arranged in a shape extending around the polar column portion, the step formed on the boundary and the case The relative rotation between the case and the interposed member can be suitably suppressed through the engagement with the recess.
前記課題を達成するための蓄電装置の製造方法は、内部と外部とを連通する挿通孔を有するケースと、少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、前記ケース外方から前記極柱部に締結される締結部材と、前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える蓄電装置に適用される。この製造方法は、前記介設部材として、前記ケースに重なる部分に凹部が形成されたものを用い、前記ケースとして、先端部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有する凸部が形成されたものを用いる。そして、前記ケース内における前記挿通孔の周縁と前記電極端子の前記鍔部との間に前記介設部材を配置した状態で前記締結部材を前記極柱部に締結して、前記ケースと前記電極端子とを締結固定する固定工程を含む。 A manufacturing method of a power storage device for achieving the above object includes a case having an insertion hole that communicates the inside and the outside, and a pole pole that includes a flange portion having a dimension that is at least partially larger than the inner diameter of the insertion hole. A state in which the pole portion is inserted into the insertion hole, and the tip of the pole portion protrudes out of the case. In the case, at least a part is disposed between the electrode terminal provided in the case, the fastening member fastened to the pole column portion from the outside of the case, and the periphery of the insertion hole and the flange portion in the case. And an interposed member. In this manufacturing method, as the interposition member, a member in which a concave portion is formed in a portion that overlaps the case is used, and as the case, a convex portion having a portion in which a tip portion overlaps the concave portion and a portion that does not overlap the concave portion. The one formed with a part is used. And the said fastening member is fastened to the said pole column part in the state which has arrange | positioned the said interposed member between the periphery of the said insertion hole in the said case, and the said collar part of the said electrode terminal, The said case and the said electrode A fixing step of fastening and fixing the terminal;
上記製造方法によれば、ケースと電極端子とを締結固定する固定工程において、ケースにおける挿通孔の周縁と電極端子の鍔部との間で介設部材が挟持されるため、ケースと介設部材との接触面の面圧が高くなる。そのため、ケースの凸部における上記ケースの凹部に重ならない部分（非オーバーラップ部分）を同凹部に重なる部分（オーバーラップ部分）と比較して窪むように変形させることができる。これにより、ケースの凸部における非オーバーラップ部分とオーバーラップ部分との境界に段差を形成することができ、その段差と介設部材の凹部とを係合させることができる。したがって、この段差と凹部との係合を通じてケースと介設部材との相対回転を抑えることができ、電極端子へのナットやボルトの螺合に際して、それらナットやボルトと共に電極端子がケースに対して相対回転することを抑えることができる。 According to the manufacturing method, in the fixing step of fastening and fixing the case and the electrode terminal, the interposed member is sandwiched between the periphery of the insertion hole in the case and the flange portion of the electrode terminal. The contact pressure on the contact surface becomes higher. For this reason, a portion of the convex portion of the case that does not overlap with the concave portion of the case (non-overlap portion) can be deformed so as to be recessed as compared with a portion that overlaps the concave portion (overlap portion). Thereby, a level | step difference can be formed in the boundary of the non-overlap part and overlap part in the convex part of a case, and the level | step difference and the recessed part of an interposed member can be engaged. Therefore, the relative rotation between the case and the interposed member can be suppressed through the engagement between the step and the recess, and when the nut or bolt is screwed to the electrode terminal, the electrode terminal together with the nut or bolt is in contact with the case. Relative rotation can be suppressed.
上記製造方法において、前記凹部は、その開口端と前記凸部の先端部分の外縁端とが交差する形状に形成されることが好ましい。
上記製造方法によれば、ケースの凸部の先端部分が非オーバーラップ部分とオーバーラップ部分とを有する形状であるため、固定工程において、ケースの凸部における上記介設部材に重なる部分のうちの上記非オーバーラップ部分を、上記オーバーラップ部分と比較して窪むように変形させることができる。
In the manufacturing method, the concave portion is preferably formed in a shape in which an opening end thereof intersects with an outer edge end of a tip portion of the convex portion.
According to the above manufacturing method, since the tip portion of the convex portion of the case has a shape having a non-overlap portion and an overlap portion, in the fixing step, the portion of the convex portion of the case that overlaps the interposed member The non-overlap portion can be deformed so as to be recessed as compared with the overlap portion.
上記製造方法において、前記凸部は、その先端部分の外縁端が前記挿通孔の周囲を囲う形状に形成され、前記介設部材は、前記極柱部が挿通される貫通孔が形成され、前記凹部の開口端が前記貫通孔の周囲を囲う形状に形成されることが好ましい。 In the manufacturing method, the convex portion is formed in a shape in which an outer edge of a tip portion surrounds the periphery of the insertion hole, and the interposed member is formed with a through hole through which the pole column portion is inserted, It is preferable that the opening end of the recess is formed in a shape surrounding the periphery of the through hole.
上記製造方法によれば、ケースの凸部における非オーバーラップ部分とオーバーラップ部分との境界を極柱部の周囲で延びる形状で配置することができるため、同境界に形成される段差と上記介設部材の凹部との係合を通じて同ケースと介設部材との相対回転を好適に抑えることができる。 According to the manufacturing method described above, the boundary between the non-overlap portion and the overlap portion in the convex portion of the case can be arranged in a shape extending around the polar column portion. The relative rotation between the case and the interposed member can be suitably suppressed through engagement with the recessed portion of the installed member.
前記課題を達成するための蓄電装置は、内部と外部とを連通する挿通孔を有するケースと、少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、前記ケースの外方から前記極柱部に締結される締結部材と、前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える。当該蓄電装置は、前記締結部材と前記鍔部との間で、前記ケースと前記鍔部とが前記介設部材を挟持させた状態で締結固定される締結固定構造を有する。前記ケースは、前記介設部材に重なる部分に凹部を有し、前記介設部材は、前記ケースに重なる部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有する。 A power storage device for achieving the above-described object has a case having an insertion hole that communicates the inside and the outside, and a pole column part that includes a flange part having a dimension that is at least partially larger than the inner diameter of the insertion hole. The case is in a state in which the flange portion is disposed in the case, is in a state in which the pole column portion is inserted into the insertion hole, and a tip of the pole column portion protrudes outside the case. An electrode terminal provided in the case, a fastening member fastened to the pole column portion from the outside of the case, and at least a part of the case being disposed between the periphery of the insertion hole and the flange portion in the case. An installation member. The power storage device has a fastening and fixing structure in which the case and the flange are fastened and fixed in a state where the interposed member is sandwiched between the fastening member and the flange. The case has a recess in a portion that overlaps the interposed member, and the interposed member has a portion that overlaps the recess and a portion that does not overlap the recess.
上記蓄電装置によれば、電極端子の極柱部への締結部材の締結を通じてケースにおける挿通孔の周縁と電極端子の鍔部との間で介設部材を挟持させる過程で、ケースと介設部材との接触面の面圧が高くなる。そのため、介設部材の上記ケースに重なる部分における同ケースの凹部に重ならない部分（非オーバーラップ部分）を同凹部に重なる部分（オーバーラップ部分）と比較して窪むように変形させることができる。したがって、介設部材における非オーバーラップ部分とオーバーラップ部分との境界に段差を形成することができ、その段差とケースの凹部とを係合させることができる。これにより、ケースと介設部材との相対回転を抑えることができるため、電極端子へのナットやボルトの螺合に際して、それらナットやボルトと共に電極端子がケースに対して相対回転することを抑えることができる。 According to the power storage device, the case and the interposition member in the process of sandwiching the interposition member between the periphery of the insertion hole in the case and the flange portion of the electrode terminal through the fastening of the fastening member to the pole portion of the electrode terminal The contact pressure on the contact surface becomes higher. Therefore, a portion (non-overlap portion) that does not overlap the concave portion of the case in the portion of the interposed member that overlaps the case can be deformed so as to be recessed as compared with a portion (overlap portion) that overlaps the concave portion. Therefore, a step can be formed at the boundary between the non-overlap portion and the overlap portion of the interposed member, and the step and the concave portion of the case can be engaged. As a result, relative rotation between the case and the interposed member can be suppressed, and therefore, when the nut or bolt is screwed into the electrode terminal, the electrode terminal is prevented from rotating relative to the case together with the nut or bolt. Can do.
上記蓄電装置において、前記凹部は、その開口端と前記介設部材の前記ケースに重なる部分の外縁端とが交差する形状であることが好ましい。
上記蓄電装置によれば、介設部材が非オーバーラップ部分とオーバーラップ部分とを有する形状であるため、非オーバーラップ部分を上記オーバーラップ部分と比較して窪むように変形させることができる。
The said electrical storage apparatus WHEREIN: It is preferable that the said recessed part is a shape where the opening edge and the outer edge end of the part which overlaps with the said case of the said interposed member cross | intersect.
According to the power storage device, since the interposed member has a shape having a non-overlap portion and an overlap portion, the non-overlap portion can be deformed so as to be recessed as compared with the overlap portion.
上記蓄電装置において、前記凹部は、その開口端が前記挿通孔の周囲を囲う形状であり、前記介設部材は、前記極柱部が挿通される貫通孔を有し、前記ケースに重なる部分の外縁端が前記貫通孔の周囲を囲う形状であることが好ましい。 In the power storage device, the concave portion has a shape in which an opening end surrounds the insertion hole, and the interposed member has a through hole through which the pole column portion is inserted, and is a portion overlapping the case. It is preferable that the outer edge end has a shape surrounding the through hole.
上記蓄電装置によれば、介設部材における非オーバーラップ部分とオーバーラップ部分との境界を極柱部の周囲で延びる形状で配置することができるため、同境界に形成される段差と上記ケースの凹部との係合を通じて同ケースと介設部材との相対回転を好適に抑えることができる。 According to the power storage device, since the boundary between the non-overlap portion and the overlap portion of the interposed member can be arranged in a shape extending around the pole column portion, the step formed on the boundary and the case The relative rotation between the case and the interposed member can be suitably suppressed through the engagement with the recess.
前記課題を達成するための蓄電装置は、内部と外部とを連通する挿通孔を有するケースと、少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、前記ケースの外方から前記極柱部に締結される締結部材と、前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える。当該蓄電装置は、前記締結部材と前記鍔部との間で、前記ケースと前記鍔部とが前記介設部材を挟持させた状態で締結固定される締結固定構造を有する。前記介設部材は、前記ケースに重なる部分に凹部を有し、前記ケースは、先端部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有する凸部を備える。 A power storage device for achieving the above-described object has a case having an insertion hole that communicates the inside and the outside, and a pole column part that includes a flange part having a dimension that is at least partially larger than the inner diameter of the insertion hole. The case is in a state in which the flange portion is disposed in the case, is in a state in which the pole column portion is inserted into the insertion hole, and a tip of the pole column portion protrudes outside the case. An electrode terminal provided in the case, a fastening member fastened to the pole column portion from the outside of the case, and at least a part of the case being disposed between the periphery of the insertion hole and the flange portion in the case. An installation member. The power storage device has a fastening and fixing structure in which the case and the flange are fastened and fixed in a state where the interposed member is sandwiched between the fastening member and the flange. The interposed member has a concave portion in a portion overlapping the case, and the case includes a convex portion having a portion where a tip portion overlaps the concave portion and a portion not overlapping the concave portion.
上記蓄電装置によれば、電極端子の極柱部への締結部材の締結を通じてケースにおける挿通孔の周縁と電極端子の鍔部との間で介設部材を挟持させる過程で、ケースと介設部材との接触面の面圧が高くなる。そのため、ケースの凸部における上記介設部材の凹部に重ならない部分（非オーバーラップ部分）を同凹部に重なる部分（オーバーラップ部分）と比較して窪むように変形させることができる。したがって、ケースの凸部における非オーバーラップ部分とオーバーラップ部分との境界に段差を形成することができ、その段差と介設部材の凹部とを係合させることができる。これにより、ケースと介設部材との相対回転を抑えることができるため、電極端子へのナットやボルトの螺合に際して、それらナットやボルトと共に電極端子がケースに対して相対回転することを抑えることができる。 According to the power storage device, the case and the interposition member in the process of sandwiching the interposition member between the periphery of the insertion hole in the case and the flange portion of the electrode terminal through the fastening of the fastening member to the pole portion of the electrode terminal The contact pressure on the contact surface becomes higher. Therefore, a portion (non-overlap portion) that does not overlap the concave portion of the interposition member in the convex portion of the case can be deformed so as to be recessed as compared with a portion (overlap portion) that overlaps the concave portion. Therefore, a step can be formed at the boundary between the non-overlap portion and the overlap portion of the convex portion of the case, and the step and the concave portion of the interposed member can be engaged. As a result, relative rotation between the case and the interposed member can be suppressed, and therefore, when the nut or bolt is screwed into the electrode terminal, the electrode terminal is prevented from rotating relative to the case together with the nut or bolt. Can do.
上記蓄電装置において、前記凹部は、その開口端と前記凸部の先端部分の外縁端とが交差する形状であることが好ましい。
上記蓄電装置によれば、ケースの凸部の先端部分が非オーバーラップ部分とオーバーラップ部分とを有する形状であるため、非オーバーラップ部分を上記オーバーラップ部分と比較して窪むように変形させることができる。
In the above power storage device, it is preferable that the concave portion has a shape in which an opening end thereof intersects with an outer edge end of a tip portion of the convex portion.
According to the power storage device, since the tip portion of the convex portion of the case has a shape having a non-overlap portion and an overlap portion, the non-overlap portion can be deformed to be recessed as compared with the overlap portion. it can.
上記蓄電装置において、前記凸部は、その先端部分の外縁端が前記挿通孔の周囲を囲う形状であり、前記介設部材は、前記極柱部が挿通される貫通孔を有し、前記凹部の開口端が前記貫通孔の周囲を囲う形状であることが好ましい。 In the power storage device, the convex portion has a shape in which an outer edge end of a tip portion thereof surrounds the insertion hole, and the interposed member has a through hole through which the pole column portion is inserted, and the concave portion It is preferable that the opening end of the shape surrounds the through hole.
上記蓄電装置によれば、ケースの凸部における非オーバーラップ部分とオーバーラップ部分との境界を極柱部の周囲で延びる形状で配置することができるため、同境界に形成される段差と上記介設部材の凹部との係合を通じて同ケースと介設部材との相対回転を好適に抑えることができる。 According to the power storage device, since the boundary between the non-overlap portion and the overlap portion in the convex portion of the case can be arranged in a shape extending around the polar column portion, the step formed on the boundary and the above-described intermediate The relative rotation between the case and the interposed member can be suitably suppressed through engagement with the recessed portion of the installed member.
本発明によれば、電極端子へのナットやボルトの螺合に際して同電極端子の連れ回りを抑えることができる。 According to the present invention, the rotation of the electrode terminal can be suppressed when the nut or the bolt is screwed to the electrode terminal.
（第１実施形態）
以下、蓄電装置を二次電池に具体化した第１実施形態について説明する。
図１または図２に示すように、二次電池１０において、金属製（例えば、ステンレス鋼やアルミニウム合金）のケース１２には電極組立体２０が収容されている。ケース１２は、開口部１３ａを有する直方体状のケース本体１３と、ケース本体１３の開口部１３ａを閉塞する矩形平板状の蓋体１４とからなる。蓋体１４は、所定の間隔を空けて並設された一対の挿通孔１５を有している。なお、本実施形態の二次電池１０は、その外周が角型をなす角型のリチウムイオン電池である。
(First embodiment)
Hereinafter, a first embodiment in which the power storage device is embodied as a secondary battery will be described.
As shown in FIG. 1 or 2, in the secondary battery 10, an electrode assembly 20 is accommodated in a case 12 made of metal (for example, stainless steel or aluminum alloy). The case 12 includes a rectangular parallelepiped case main body 13 having an opening 13 a and a rectangular flat plate-shaped lid body 14 that closes the opening 13 a of the case main body 13. The lid body 14 has a pair of insertion holes 15 arranged in parallel at a predetermined interval. In addition, the secondary battery 10 of this embodiment is a square lithium ion battery whose outer periphery forms a square shape.
図３に示すように、電極組立体２０は、正極電極２１と負極電極２２とを備えるとともに、正極電極２１と負極電極２２の間を絶縁するセパレータ２３を介在させて層状をなす積層体とされている。正極電極２１は、矩形状の正極用金属箔（本実施形態ではアルミニウム箔）２１ａと、その正極用金属箔２１ａの両面に形成された正極活物質層２１ｂとを有する。負極電極２２は、矩形状の負極用金属箔（本実施形態では銅箔）２２ａと、その負極用金属箔２２ａの両面に形成された負極活物質層２２ｂとを有する。 As shown in FIG. 3, the electrode assembly 20 includes a positive electrode 21 and a negative electrode 22, and is a layered body having a separator 23 that insulates between the positive electrode 21 and the negative electrode 22. ing. The positive electrode 21 includes a rectangular metal foil for positive electrode (in this embodiment, an aluminum foil) 21a, and a positive electrode active material layer 21b formed on both surfaces of the metal foil for positive electrode 21a. The negative electrode 22 includes a rectangular negative electrode metal foil (copper foil in the present embodiment) 22a and negative electrode active material layers 22b formed on both surfaces of the negative electrode metal foil 22a.
正極電極２１の一辺方向（長辺方向）の一部には、正極用金属箔２１ａの一端から突出した形状の正極集電タブ３１が設けられている。正極集電タブ３１は、電極組立体２０を構成する各正極電極２１において同位置に同一形状で形成されている。負極電極２２の一辺方向（長辺方向）の一部には、負極用金属箔２２ａの一端から突出した形状の負極集電タブ３２が設けられている。負極集電タブ３２は、電極組立体２０を構成する各負極電極２２において同位置に同一形状で形成されている。 A positive electrode current collecting tab 31 having a shape protruding from one end of the positive electrode metal foil 21 a is provided in a part of one side direction (long side direction) of the positive electrode 21. The positive electrode current collecting tab 31 is formed in the same position and in the same shape in each positive electrode 21 constituting the electrode assembly 20. A part of one side direction (long side direction) of the negative electrode 22 is provided with a negative current collecting tab 32 having a shape protruding from one end of the negative electrode metal foil 22a. The negative electrode current collecting tab 32 is formed in the same position and in the same shape in each negative electrode 22 constituting the electrode assembly 20.
図１に示すように、電極組立体２０を構成する正極電極２１は、それぞれの正極集電タブ３１が積層方向に沿って列状に配置されるように積層される。同様に、電極組立体２０を構成する負極電極２２は、それぞれの負極集電タブ３２が、正極集電タブ３１と重ならないように積層方向に沿って列状に配置されるように積層される。そして、複数の正極集電タブ３１は、電極組立体２０における積層方向の一端から他端までの範囲に集められる。また、複数の負極集電タブ３２も同様に、電極組立体２０における積層方向の一端から他端までの範囲に集められる。 As shown in FIG. 1, the positive electrodes 21 constituting the electrode assembly 20 are stacked such that the respective positive electrode current collecting tabs 31 are arranged in a row along the stacking direction. Similarly, the negative electrode 22 constituting the electrode assembly 20 is laminated so that the respective negative electrode current collecting tabs 32 are arranged in a row along the lamination direction so as not to overlap the positive electrode current collecting tabs 31. . The plurality of positive electrode current collecting tabs 31 are collected in a range from one end to the other end of the electrode assembly 20 in the stacking direction. Similarly, the plurality of negative electrode current collecting tabs 32 are collected in a range from one end to the other end in the stacking direction of the electrode assembly 20.
電極組立体２０は、正極集電タブ３１を集めてなる正極タブ群４５を備える。この正極タブ群４５は、スポット溶接により正極導電部材３３に固定され、少なくとも最外の正極集電タブ３１が、正極導電部材３３に溶接されている。また、電極組立体２０は、負極集電タブ３２を集めてなる負極タブ群４６を備える。この負極タブ群４６は、スポット溶接により負極導電部材３７に固定され、少なくとも最外の負極集電タブ３２が負極導電部材３７に溶接されている。 The electrode assembly 20 includes a positive electrode tab group 45 formed by collecting positive electrode current collecting tabs 31. The positive electrode tab group 45 is fixed to the positive electrode conductive member 33 by spot welding, and at least the outermost positive electrode current collecting tab 31 is welded to the positive electrode conductive member 33. The electrode assembly 20 includes a negative electrode tab group 46 formed by collecting the negative electrode current collecting tabs 32. The negative electrode tab group 46 is fixed to the negative electrode conductive member 37 by spot welding, and at least the outermost negative electrode current collecting tab 32 is welded to the negative electrode conductive member 37.
図１または図４に示すように、正極導電部材３３及び負極導電部材３７は、四角板状をなす端子接続部３４を有する。端子接続部３４において、後述の電極端子としての正極端子４１または負極端子４２が固定される面（図４における上方の面）を第１面３４ａとし、第１面３４ａと反対側の面（図４における下方の面）を第２面３４ｂとする。正極導電部材３３及び負極導電部材３７は、第２面３４ｂから第１面３４ａに向けて立ち上がる立上げ部３５を有するとともに、端子接続部３４から離れる方向に向けて立上げ部３５から延びるタブ溶接部３６を有している。なお、このタブ溶接部３６は矩形板状である。 As shown in FIG. 1 or FIG. 4, the positive electrode conductive member 33 and the negative electrode conductive member 37 have a terminal connection portion 34 having a square plate shape. In the terminal connection portion 34, a surface (upper surface in FIG. 4) on which a positive electrode terminal 41 or a negative electrode terminal 42 as an electrode terminal to be described later is fixed is defined as a first surface 34a, and a surface opposite to the first surface 34a (see FIG. The lower surface in FIG. 4 is the second surface 34b. The positive electrode conductive member 33 and the negative electrode conductive member 37 have a rising portion 35 that rises from the second surface 34 b toward the first surface 34 a, and tab welding that extends from the rising portion 35 in a direction away from the terminal connection portion 34. A portion 36 is provided. The tab weld 36 is a rectangular plate.
正極導電部材３３の端子接続部３４には正極端子４１が固定されており、負極導電部材３７の端子接続部３４には負極端子４２が固定されている。正極端子４１及び負極端子４２は、それぞれ略円板形状の鍔部４３を有する。この鍔部４３において、蓋体１４の内面１４ａに対向する面を座面４３ａとするとともに、鍔部４３の厚み方向における上記座面４３ａと反対側の面を組立体側端面４３ｂとする。鍔部４３の中央からは円筒状の極柱部４４が立設されており、座面４３ａは極柱部４４を取り囲んでいる。極柱部４４は、外周面に雄ねじ４４ａを有するとともに、内周面に雌ねじ４４ｂを有する。 A positive electrode terminal 41 is fixed to the terminal connection portion 34 of the positive electrode conductive member 33, and a negative electrode terminal 42 is fixed to the terminal connection portion 34 of the negative electrode conductive member 37. The positive terminal 41 and the negative terminal 42 each have a substantially disc-shaped flange 43. In this flange portion 43, a surface facing the inner surface 14a of the lid body 14 is a seat surface 43a, and a surface opposite to the seat surface 43a in the thickness direction of the flange portion 43 is an assembly side end surface 43b. A cylindrical pole post 44 is erected from the center of the flange 43, and a seating surface 43 a surrounds the pole post 44. The pole portion 44 has a male screw 44a on the outer peripheral surface and a female screw 44b on the inner peripheral surface.
鍔部４３には、合成樹脂（例えば、ポリフェニレンサルファイド［ＰＰＳ］、ポリプロピレン［ＰＰ］）製の介設部材としての蓋体側カバー５０が装着されている。蓋体側カバー５０は、中央に貫通孔５０ａを有する円板形状の蓋側絶縁板５１と、この蓋側絶縁板５１を囲うように同蓋側絶縁板５１の外縁から略円筒状で突出するケース側絶縁板５２とを備えている。この蓋体側カバー５０は、蓋側絶縁板５１の貫通孔５０ａに極柱部４４が挿入された状態であり、且つケース側絶縁板５２が前記鍔部４３の外周面を覆う状態で、電極端子（正極端子４１または負極端子４２）に設けられている。これにより蓋側絶縁板５１が、鍔部４３の座面４３ａと蓋体１４の内面１４ａとの間に配置（挟持）されて、電極端子と蓋体１４との間を電気的に絶縁している。また、ケース側絶縁板５２が、鍔部４３の外周面とケース本体１３との間で同ケース本体と平行に延びる状態で配置されて、電極端子とケース本体１３との間を電気的に絶縁している。 A lid side cover 50 as an interposed member made of synthetic resin (for example, polyphenylene sulfide [PPS], polypropylene [PP]) is attached to the collar portion 43. The lid body side cover 50 is a disc-shaped lid side insulating plate 51 having a through hole 50a in the center, and a case projecting in a substantially cylindrical shape from the outer edge of the lid side insulating plate 51 so as to surround the lid side insulating plate 51. Side insulating plate 52. The lid body side cover 50 is in a state where the pole column portion 44 is inserted into the through hole 50a of the lid side insulating plate 51, and the case side insulating plate 52 covers the outer peripheral surface of the flange portion 43. (Positive electrode terminal 41 or negative electrode terminal 42). As a result, the lid-side insulating plate 51 is disposed (sandwiched) between the seating surface 43a of the collar portion 43 and the inner surface 14a of the lid body 14 to electrically insulate between the electrode terminal and the lid body 14. Yes. The case-side insulating plate 52 is disposed between the outer peripheral surface of the flange portion 43 and the case main body 13 so as to extend in parallel with the case main body, and electrically insulates between the electrode terminal and the case main body 13. doing.
また、電極端子の鍔部４３には、合成樹脂（例えば、ポリフェニレンサルファイド［ＰＰＳ］、ポリプロピレン［ＰＰ］）製の組立体側カバー７０が装着されている。この組立体側カバー７０は、電極端子の電極組立体２０側の面を覆う状態で、電極組立体２０（図１参照）側から電極端子（詳しくは、端子接続部３４）に取り付けられている。この組立体側カバー７０により、電極組立体２０の上記電極端子側の面と同電極端子との間が電気的に絶縁されている。 Further, an assembly side cover 70 made of a synthetic resin (for example, polyphenylene sulfide [PPS], polypropylene [PP]) is attached to the flange portion 43 of the electrode terminal. The assembly-side cover 70 is attached to the electrode terminal (specifically, the terminal connecting portion 34) from the electrode assembly 20 (see FIG. 1) side so as to cover the surface of the electrode terminal on the electrode assembly 20 side. The assembly-side cover 70 electrically insulates the surface of the electrode assembly 20 from the electrode terminal side and the electrode terminal.
二次電池１０では、蓋側絶縁板５１の貫通孔５０ａが極柱部４４の全周を取り囲んでいる。また、蓋側絶縁板５１は鍔部４３の座面４３ａ上に支持されている。鍔部４３の座面４３ａ上には、Ｏリング５６が極柱部４４を取り囲む状態で設けられている。Ｏリング５６は、蓋側絶縁板５１の貫通孔５０ａ内に配置されるとともに、全周が同貫通孔５０ａの内周面によって取り囲まれている。 In the secondary battery 10, the through hole 50 a of the lid-side insulating plate 51 surrounds the entire circumference of the pole column portion 44. The lid-side insulating plate 51 is supported on the seating surface 43 a of the flange portion 43. An O-ring 56 is provided on the seat surface 43 a of the collar portion 43 so as to surround the pole column portion 44. The O-ring 56 is disposed in the through hole 50a of the lid-side insulating plate 51, and the entire circumference is surrounded by the inner peripheral surface of the through-hole 50a.
蓋側絶縁板５１の貫通孔５０ａに挿入された極柱部４４は、蓋体１４の挿通孔１５からケース１２の外部に突出（露出）している。そして、電極端子の鍔部４３は、極柱部４４の両端のうちケース本体１３内側に位置する一端に設けられている。また、鍔部４３は、蓋体１４と平行な断面積が、挿通孔１５の開口面積よりも大きく設定されている。このため、鍔部４３は、ケース本体１３の内側で挿通孔１５から抜け出し不能になっている。蓋体１４の挿通孔１５の内周面と、極柱部４４の外周面とは、外部カバー１９によって絶縁されている。 The pole column portion 44 inserted into the through hole 50 a of the lid-side insulating plate 51 protrudes (exposes) outside the case 12 from the insertion hole 15 of the lid body 14. The flange 43 of the electrode terminal is provided at one end located inside the case main body 13 among the both ends of the pole post 44. Further, the flange portion 43 is set so that the cross-sectional area parallel to the lid body 14 is larger than the opening area of the insertion hole 15. For this reason, the collar part 43 cannot be removed from the insertion hole 15 inside the case main body 13. The inner peripheral surface of the insertion hole 15 of the lid body 14 and the outer peripheral surface of the pole post 44 are insulated by the outer cover 19.
外部カバー１９は、円環状の筒状部２４と、この筒状部２４の軸方向の一端から径方向外方へ延設されたフランジ部２５とを有する。筒状部２４は、挿通孔１５の内周面と、極柱部４４の外周面との間に介装されている。フランジ部２５は、蓋体１４の外面１４ｂにおいて挿通孔１５の周囲に設けられている。 The outer cover 19 includes an annular cylindrical portion 24 and a flange portion 25 that extends radially outward from one axial end of the cylindrical portion 24. The cylindrical portion 24 is interposed between the inner peripheral surface of the insertion hole 15 and the outer peripheral surface of the pole column portion 44. The flange portion 25 is provided around the insertion hole 15 on the outer surface 14 b of the lid body 14.
極柱部４４の雄ねじ４４ａにはケース１２の外方から締結部材としてのナット５５が螺合されている。
二次電池１０では、蓋体１４の外面１４ｂにおける挿通孔１５の周縁とナット５５の蓋体１４側の端面との間には外部カバー１９のフランジ部２５が挟圧されており、このフランジ部２５によってナット５５と蓋体１４との間が電気的に絶縁されている。また、ナット５５が極柱部４４に螺合されることによって、ナット５５と鍔部４３との間に、フランジ部２５、蓋体１４、Ｏリング５６及び蓋側絶縁板５１が挟圧されるとともに極柱部４４が蓋体１４に締結固定されている。こうした締結固定構造により、Ｏリング５６は圧縮状態で蓋体１４の内面１４ａ及び鍔部４３の座面４３ａに密接して、挿通孔１５の周囲をシールしている。
A nut 55 as a fastening member is screwed into the male screw 44 a of the pole post 44 from the outside of the case 12.
In the secondary battery 10, the flange portion 25 of the outer cover 19 is sandwiched between the peripheral edge of the insertion hole 15 in the outer surface 14 b of the lid body 14 and the end surface of the nut 55 on the lid body 14 side. 25, the nut 55 and the lid body 14 are electrically insulated. Further, when the nut 55 is screwed into the pole post portion 44, the flange portion 25, the lid body 14, the O-ring 56 and the lid-side insulating plate 51 are sandwiched between the nut 55 and the flange portion 43. In addition, the pole portion 44 is fastened and fixed to the lid body 14. With such a fastening and fixing structure, the O-ring 56 is in close contact with the inner surface 14a of the lid body 14 and the seating surface 43a of the flange portion 43 in a compressed state, thereby sealing the periphery of the insertion hole 15.
図１に示すように、二次電池１０同士を電気的に接続するバスバー６０は、矩形板状であり、一対の挿通部６０ａを有する。バスバー６０は、極柱部４４の先端面に支持されている。極柱部４４の雌ねじ４４ｂには、ボルト６１が螺合されている。このボルト６１によってバスバー６０が極柱部４４の先端面に押し当てられるとともに、極柱部４４とバスバー６０が導通している。 As shown in FIG. 1, the bus bar 60 that electrically connects the secondary batteries 10 has a rectangular plate shape and includes a pair of insertion portions 60 a. The bus bar 60 is supported on the distal end surface of the pole column portion 44. Bolts 61 are screwed into the female threads 44 b of the pole post 44. The bus bar 60 is pressed against the tip end surface of the pole post 44 by the bolt 61, and the pole post 44 and the bus bar 60 are electrically connected.
二次電池１０は、電極端子とケース１２との相対回転を抑えるための回り止め構造を有している。以下、この回り止め構造について説明する。
図５（ａ）及び図５（ｂ）に示すように、蓋体１４は内面１４ａに長穴形状の凹部１６を有している。この凹部１６は、その開口端が蓋体１４の挿通孔１５の周囲を囲う形状である。また凹部１６の開口端は、二次電池１０が組み立てられた状態で、蓋体側カバー５０（詳しくは、蓋側絶縁板５１）の上記蓋体１４に重なる部分の外縁端（図中に一点鎖線で示す）と交差する形状になっている。詳しくは、円形状の蓋側絶縁板５１の上記蓋体１４に重なる部分の外縁端が長穴形状の凹部１６の開口端における２つの直線部分からそれぞれはみ出した状態で、凹部１６と蓋側絶縁板５１とが重なっている。このように蓋体側カバー５０の蓋側絶縁板５１は上記蓋体１４の凹部１６に重なる部分と同凹部１６に重ならない部分とを有している。
The secondary battery 10 has a rotation preventing structure for suppressing relative rotation between the electrode terminal and the case 12. Hereinafter, the rotation preventing structure will be described.
As shown in FIGS. 5 (a) and 5 (b), the lid 14 has an elongated hole-shaped recess 16 on the inner surface 14a. The concave portion 16 has a shape in which the opening end surrounds the insertion hole 15 of the lid body 14. Further, the open end of the recess 16 has an outer edge (a dashed line in the figure) of a portion of the lid body side cover 50 (specifically, the lid side insulating plate 51) that overlaps the lid body 14 in a state where the secondary battery 10 is assembled. The shape intersects with Specifically, the outer edge of the circular lid-side insulating plate 51 that overlaps the lid body 14 protrudes from the two linear portions at the opening end of the elongated hole-shaped concave portion 16, respectively, and the concave portion 16 and the lid-side insulation. The plate 51 overlaps. As described above, the lid-side insulating plate 51 of the lid-side cover 50 has a portion that overlaps the recess 16 of the lid 14 and a portion that does not overlap the recess 16.
図６（ａ）及び図６（ｂ）に示すように、蓋体側カバー５０のケース側絶縁板５２の内面は、四隅がそれぞれ同一中心軸の円弧形状になるとともに、それら円弧形状の間の部分が直線形状になる断面形状で延びている。また蓋側絶縁板５１の蓋体１４に重なる面（図６［ｂ］における右側の面）は平面形状である。 As shown in FIGS. 6A and 6B, the inner surface of the case-side insulating plate 52 of the lid-side cover 50 has arcuate shapes with four corners having the same central axis, and portions between these arcuate shapes. Extends in a cross-sectional shape that is linear. Further, the surface of the lid-side insulating plate 51 that overlaps the lid body 14 (the right-side surface in FIG. 6B) has a planar shape.
図７（ａ）及び図７（ｂ）に示すように、電極端子の鍔部４３の外周形状は、上記蓋体側カバー５０のケース側絶縁板５２の内面と係合する形状である。詳しくは、電極端子の鍔部４３は、極柱部４４の中心軸と直交する方向における断面形状において、その四隅が同一中心軸の円弧形状になるとともに、それら円弧形状の間の部分が直線形状になる形状になっている。
As shown in FIGS. 7A and 7B, the outer peripheral shape of the flange 43 of the electrode terminal is a shape that engages with the inner surface of the case-side insulating plate 52 of the lid-side cover 50. Specifically, the flange 43 of the electrode terminal has an arc shape with the same center axis at the four corners in a cross-sectional shape in a direction orthogonal to the central axis of the pole column 44, and a portion between the arc shapes is a linear shape. It becomes the shape that becomes.
本実施形態では、二次電池１０の組み立て（製造）に際して、上述した形状で蓋体１４、蓋体側カバー５０、及び電極端子が形成される。そして図４に示すように、蓋体１４の内面１４ａにおける挿通孔１５の周縁と電極端子の鍔部４３の座面４３ａとの間に蓋体側カバー５０の蓋側絶縁板５１を配置した状態で、ナット５５が電極端子の雄ねじ４４ａに螺合され、これによりケース１２と電極端子とが締結固定される。本実施形態では、このようにしてケース１２と電極端子とを締結固定する工程が固定工程になる。 In the present embodiment, when the secondary battery 10 is assembled (manufactured), the lid body 14, the lid body side cover 50, and the electrode terminals are formed in the shape described above. And in the state which has arrange | positioned the cover side insulating board 51 of the cover body side cover 50 between the periphery of the penetration hole 15 in the inner surface 14a of the cover body 14, and the seat surface 43a of the collar part 43 of an electrode terminal, as shown in FIG. The nut 55 is screwed into the male screw 44a of the electrode terminal, whereby the case 12 and the electrode terminal are fastened and fixed. In the present embodiment, the step of fastening and fixing the case 12 and the electrode terminal in this way is the fixing step.
本実施形態の二次電池１０は次のような作用を奏する。すなわち、蓋体１４における挿通孔１５の周縁と電極端子の鍔部４３との間で蓋体側カバー５０の蓋側絶縁板５１が挟圧される。 The secondary battery 10 of this embodiment has the following effects. That is, the lid-side insulating plate 51 of the lid-side cover 50 is sandwiched between the peripheral edge of the insertion hole 15 in the lid 14 and the flange 43 of the electrode terminal.
上記実施形態によれば、以下のような効果を得ることができる。
（１）二次電池１０では、蓋体１４と蓋体側カバー５０の蓋側絶縁板５１との接触面の面圧が高くなる。これにより図８に示すように、蓋側絶縁板５１の上記蓋体１４に重なる部分における同蓋体１４の凹部１６に重ならない部分（非オーバーラップ部分［図中に矢印Ａで示す部分］）を、同凹部１６に重なる部分（オーバーラップ部分［図中に矢印Ｂで示す部分］）と比較して窪むように変形させることができる。そのため、蓋側絶縁板５１における非オーバーラップ部分Ａとオーバーラップ部分Ｂとの境界に段差を形成することができ、その段差と蓋体１４の凹部１６とを係合させることができる。本実施形態では、上記境界（図５参照）が極柱部４４の中心軸を中心とする円弧形状以外の形状（直線形状）で延びているため、上記段差と凹部１６との係合を通じて蓋体１４と蓋側絶縁板５１との相対回転が抑えられるようになる。なお、蓋側絶縁板５１のオーバーラップ部分Ｂは、上記凹部１６の内部において曲率の低いなだらかな稜線を有する凸部になる。しかも、二次電池１０では、蓋体側カバー５０のケース側絶縁板５２の内面（図６参照）と電極端子の鍔部４３の外面（図７参照）とが係合しているため、電極端子と蓋体側カバー５０との相対回転を抑えることもできる。したがって二次電池１０によれば、蓋体１４と蓋体側カバー５０と電極端子との相対回転を抑えることができ、電極端子へのナット５５やボルト６１の螺合に際して、それらナット５５やボルト６１と共に電極端子がケース１２に対して相対回転することを抑えることができる。
According to the above embodiment, the following effects can be obtained.
(1) In the secondary battery 10, the surface pressure of the contact surface between the lid 14 and the lid-side insulating plate 51 of the lid-side cover 50 is increased. As a result, as shown in FIG. 8, the portion of the lid-side insulating plate 51 that overlaps the lid body 14 that does not overlap the recess 16 of the lid body 14 (non-overlapping portion [portion indicated by arrow A in the figure]) Can be deformed so as to be recessed as compared with a portion overlapping the concave portion 16 (overlap portion [portion indicated by arrow B in the drawing]). Therefore, a step can be formed at the boundary between the non-overlap portion A and the overlap portion B in the lid-side insulating plate 51, and the step and the concave portion 16 of the lid body 14 can be engaged. In the present embodiment, since the boundary (see FIG. 5) extends in a shape (linear shape) other than the arc shape centering on the central axis of the pole post 44, the lid is formed through the engagement between the step and the recess 16. The relative rotation between the body 14 and the lid-side insulating plate 51 is suppressed. The overlap portion B of the lid-side insulating plate 51 becomes a convex portion having a gentle ridge line with a low curvature inside the concave portion 16. In addition, in the secondary battery 10, the inner surface (see FIG. 6) of the case-side insulating plate 52 of the lid-side cover 50 is engaged with the outer surface (see FIG. 7) of the flange 43 of the electrode terminal. Relative rotation between the lid body side cover 50 and the cover body side cover 50 can also be suppressed. Therefore, according to the secondary battery 10, the relative rotation of the lid body 14, the lid body side cover 50, and the electrode terminal can be suppressed, and when the nut 55 or the bolt 61 is screwed to the electrode terminal, the nut 55 or the bolt 61. At the same time, the electrode terminal can be prevented from rotating relative to the case 12.
なお二次電池１０の組み立て前における蓋体側カバー５０の上記蓋体１４に重なる部分の形状を、蓋体１４の凹部１６に係合する凸部を有する形状にすることも考えられる。この場合、二次電池１０の組み立て時に蓋体側カバー５０の凸部と蓋体１４の凹部１６とを係合させる必要があるため、その組み立て作業が煩雑になってしまう。本実施形態では、二次電池１０の組み立てに際して、そうした凹部と凸部とを係合させる作業が不要になるため、ケース１２の蓋体１４に電極端子を締結固定するための作業を簡素な手順で行うことができる。 Note that it is also conceivable that the shape of the portion of the lid side cover 50 that overlaps the lid body 14 before the secondary battery 10 is assembled has a convex portion that engages with the concave portion 16 of the lid body 14. In this case, since it is necessary to engage the convex part of the cover body side cover 50 and the concave part 16 of the cover body 14 at the time of the assembly of the secondary battery 10, the assembly operation will become complicated. In the present embodiment, when assembling the secondary battery 10, it is not necessary to engage the concave portion and the convex portion. Therefore, the procedure for fastening and fixing the electrode terminal to the lid body 14 of the case 12 is simplified. Can be done.
（２）蓋側絶縁板５１の上記蓋体１４に重なる部分が非オーバーラップ部分Ａとオーバーラップ部分Ｂとを有する形状であるため、非オーバーラップ部分Ａを上記オーバーラップ部分Ｂと比較して窪むように変形させることができる。 (2) Since the portion of the lid-side insulating plate 51 that overlaps the lid body 14 has a non-overlap portion A and an overlap portion B, the non-overlap portion A is compared with the overlap portion B. It can be deformed so as to be depressed.
（３）蓋側絶縁板５１の上記蓋体１４に重なる部分における非オーバーラップ部分Ａとオーバーラップ部分Ｂとの境界を極柱部４４の周囲で延びる形状で配置することができるため、同境界に形成される段差と上記蓋体１４の凹部１６との係合を通じてケース１２と蓋体側カバー５０との相対回転を好適に抑えることができる。 (3) Since the boundary between the non-overlap portion A and the overlap portion B in the portion of the lid-side insulating plate 51 that overlaps the lid body 14 can be arranged in a shape extending around the pole portion 44, the same boundary The relative rotation between the case 12 and the lid body side cover 50 can be suitably suppressed through the engagement between the step formed on the lid 14 and the recess 16 of the lid body 14.
（第２実施形態）
以下、蓄電装置を二次電池に具体化した第２実施形態について、第１実施形態との相違点を中心に説明する。
(Second Embodiment)
Hereinafter, a second embodiment in which the power storage device is embodied as a secondary battery will be described focusing on differences from the first embodiment.
本実施形態の二次電池と第１実施形態の二次電池とは、ケースの蓋体の形状および蓋体側カバーの形状のみが異なる。以下、本実施形態の蓋体と蓋体側カバーの形状について説明する。なお以下では、第１実施形態と同一の構成については同一の符号を付して示し、その詳細な説明は割愛する。 The secondary battery of the present embodiment and the secondary battery of the first embodiment differ only in the shape of the case lid and the shape of the lid cover. Hereinafter, the shapes of the lid body and the lid body side cover of the present embodiment will be described. In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
図９、図１０（ａ）及び図１０（ｂ）のいずれかに示すように、二次電池８０はケース８２の蓋体８４の内面８４ａに円筒形状の凸部８７を有している。この凸部８７は、その内部が前記電極端子の挿通される挿通孔８５になっている。すなわち凸部８７は、その先端部分の外縁端が挿通孔１５の周囲を囲う形状である。また、凸部８７の先端面（図９における下面）は平面形状になっている。 As shown in any of FIGS. 9, 10 (a) and 10 (b), the secondary battery 80 has a cylindrical convex portion 87 on the inner surface 84 a of the lid 84 of the case 82. The convex portion 87 has an insertion hole 85 through which the electrode terminal is inserted. That is, the convex portion 87 has a shape in which the outer edge of the tip portion surrounds the insertion hole 15. Moreover, the front end surface (lower surface in FIG. 9) of the convex part 87 has a planar shape.
図９、図１１（ａ）及び図１１（ｂ）のいずれかに示すように、蓋体側カバー９０の蓋側絶縁板９１は、中央に貫通孔９０ａを有する円板形状である。蓋側絶縁板９１は、蓋体８４に重なる面（図９における上面）に長穴形状の凹部９３を有している。この凹部９３は、その開口端が、二次電池８０が組み立てられた状態で、蓋体８４における上記蓋側絶縁板９１に重なる部分（凸部８７の先端部分）の外縁端（図中に一点鎖線で示す）と交差する形状になっている。詳しくは、長穴形状の凹部９３の開口端における２つの直線部分から円形状の凸部８７の先端部分の外縁端がそれぞれはみ出した状態で、凹部９３と凸部８７の先端部分とが重なっている。このように蓋体８４は、その凸部８７が上記蓋体側カバー９０の凹部９３に重なる部分と同凹部９３に重ならない部分とを有している。 As shown in any of FIG. 9, FIG. 11 (a) and FIG. 11 (b), the lid-side insulating plate 91 of the lid-side cover 90 has a disk shape having a through hole 90a at the center. The lid-side insulating plate 91 has a long hole-shaped recess 93 on a surface (upper surface in FIG. 9) that overlaps the lid 84. The recessed portion 93 has an open end that is the outer edge of a portion (a tip portion of the protruding portion 87) that overlaps the lid-side insulating plate 91 in the cover body 84 in a state where the secondary battery 80 is assembled. (Shown with a chain line). Specifically, in a state where the outer edge ends of the distal end portion of the circular convex portion 87 protrude from the two linear portions at the opening end of the elongated hole-shaped concave portion 93, the concave portion 93 and the distal end portion of the convex portion 87 overlap each other. Yes. Thus, the lid 84 has a portion where the convex portion 87 overlaps the concave portion 93 of the lid side cover 90 and a portion where the convex portion 87 does not overlap the concave portion 93.
本実施形態では、二次電池８０の組み立て（製造）時における固定工程において、蓋体８４の内面８４ａにおける挿通孔８５の周縁と電極端子の鍔部４３の座面４３ａとの間に蓋体側カバー９０の蓋側絶縁板９１を配置した状態で、ナット５５が電極端子の雄ねじ４４ａに螺合され、これによりケース８２と電極端子とが締結固定される。この固定工程では、蓋体８４における挿通孔８５の周縁と電極端子の鍔部４３との間で蓋体側カバー９０の蓋側絶縁板９１が挟圧される。 In the present embodiment, in the fixing step when assembling (manufacturing) the secondary battery 80, the lid side cover is provided between the peripheral edge of the insertion hole 85 in the inner surface 84 a of the lid 84 and the seat surface 43 a of the flange 43 of the electrode terminal. The nut 55 is screwed into the male screw 44a of the electrode terminal with the 90-side lid-side insulating plate 91 disposed, whereby the case 82 and the electrode terminal are fastened and fixed. In this fixing step, the lid-side insulating plate 91 of the lid-side cover 90 is sandwiched between the periphery of the insertion hole 85 in the lid 84 and the flange 43 of the electrode terminal.
上記実施形態によれば、以下のような効果を得ることができる。
（４）二次電池８０では、蓋体８４の凸部８７と蓋体側カバー９０の蓋側絶縁板９１との接触面の面圧が高くなる。これにより図１２に示すように、蓋体８４の凸部の先端部分、すなわち上記蓋側絶縁板９１に重なる部分における同蓋側絶縁板９１の凹部９３に重ならない部分（非オーバーラップ部分［図中に矢印Ｃで示す部分］）を、同凹部９３に重なる部分（オーバーラップ部分［図中に矢印Ｄで示す部分］）と比較して窪むように変形させることができる。そのため、蓋体８４の凸部８７における非オーバーラップ部分Ｃとオーバーラップ部分Ｄとの境界に段差を形成することができ、その段差と蓋体側カバー９０の凹部９３とを係合させることができる。本実施形態では、上記境界（図１１参照）が極柱部４４の中心軸を中心とする円弧形状以外の形状（直線形状）で延びているため、上記段差と凹部９３との係合を通じて、蓋体８４と蓋側絶縁板９１との相対回転が抑えられるようになる。なお、蓋体８４の凸部８７のオーバーラップ部分Ｄは、上記凹部９３の内部において曲率の低いなだらかな稜線を有する凸部になる。しかも、二次電池８０では、蓋体側カバー９０のケース側絶縁板５２の内面と電極端子の鍔部４３の外面とが係合しているため、電極端子と蓋体側カバー９０との相対回転を抑えることもできる。したがって二次電池８０によれば、蓋体８４と蓋体側カバー９０と電極端子との相対回転を抑えることができ、電極端子へのナット５５やボルト６１の螺合に際して、それらナット５５やボルト６１と共に電極端子がケース８２に対して相対回転することを抑えることができる。
According to the above embodiment, the following effects can be obtained.
(4) In the secondary battery 80, the contact pressure between the convex portion 87 of the lid 84 and the lid-side insulating plate 91 of the lid-side cover 90 is increased. As a result, as shown in FIG. 12, the tip of the convex portion of the lid 84, that is, the portion that does not overlap the concave portion 93 of the lid-side insulating plate 91 in the portion that overlaps the lid-side insulating plate 91 (non-overlapping portion [FIG. The portion indicated by arrow C in the inside] can be deformed so as to be recessed as compared with the portion overlapping the concave portion 93 (overlapping portion [portion indicated by arrow D in the drawing]). Therefore, a step can be formed at the boundary between the non-overlap portion C and the overlap portion D in the convex portion 87 of the lid 84, and the step can be engaged with the concave portion 93 of the lid side cover 90. . In the present embodiment, since the boundary (see FIG. 11) extends in a shape (linear shape) other than the arc shape centered on the central axis of the pole post 44, through the engagement between the step and the recess 93, The relative rotation between the lid 84 and the lid-side insulating plate 91 is suppressed. The overlap portion D of the convex portion 87 of the lid 84 is a convex portion having a gentle ridge line with a low curvature inside the concave portion 93. Moreover, in the secondary battery 80, since the inner surface of the case-side insulating plate 52 of the lid-side cover 90 is engaged with the outer surface of the collar portion 43 of the electrode terminal, relative rotation between the electrode terminal and the lid-side cover 90 is prevented. It can also be suppressed. Therefore, according to the secondary battery 80, relative rotation of the lid 84, the lid side cover 90, and the electrode terminal can be suppressed, and when the nut 55 and the bolt 61 are screwed to the electrode terminal, the nut 55 and the bolt 61 are connected. At the same time, the electrode terminal can be prevented from rotating relative to the case 82.
なお二次電池８０の組み立て前における蓋体８４の凸部の形状を蓋体側カバー９０の凹部９３に係合する形状にすることも考えられる。この場合、二次電池１０の組み立て時に蓋体８４の凸部と蓋体側カバー９０の凹部９３とを係合させる必要があるため、その組み立て作業が煩雑になってしまう。本実施形態では、二次電池８０の組み立てに際して、そうした凹部と凸部とを係合させる作業が不要になるため、ケース８２の蓋体８４に電極端子を締結固定するための作業を簡素な手順で行うことができる。 It is also conceivable that the shape of the convex portion of the lid 84 before the secondary battery 80 is assembled is a shape that engages the concave portion 93 of the lid side cover 90. In this case, since it is necessary to engage the convex part of the cover body 84 and the concave part 93 of the cover body side cover 90 at the time of the assembly of the secondary battery 10, the assembly operation will become complicated. In the present embodiment, when assembling the secondary battery 80, the operation of engaging the concave portion and the convex portion is not necessary, and therefore the operation for fastening and fixing the electrode terminal to the lid 84 of the case 82 is a simple procedure. Can be done.
（５）蓋体８４の凸部の先端部分が非オーバーラップ部分Ｃとオーバーラップ部分Ｄとを有する形状であるため、非オーバーラップ部分Ｃを、上記オーバーラップ部分Ｄと比較して窪むように変形させることができる。 (5) Since the tip of the convex portion of the lid 84 has a shape having a non-overlap portion C and an overlap portion D, the non-overlap portion C is deformed so as to be recessed as compared with the overlap portion D. Can be made.
（６）蓋体８４の凸部８７の先端部分における非オーバーラップ部分Ｃとオーバーラップ部分Ｄとの境界を極柱部４４の周囲で延びる形状で配置することができるため、同境界に形成される段差と上記蓋側絶縁板９１の凹部９３との係合を通じてケース８２と蓋体側カバー９０との相対回転を好適に抑えることができる。 (6) Since the boundary between the non-overlap portion C and the overlap portion D at the tip portion of the convex portion 87 of the lid 84 can be arranged in a shape extending around the polar column portion 44, it is formed at the same boundary. The relative rotation between the case 82 and the lid body side cover 90 can be suitably suppressed through the engagement between the step and the concave portion 93 of the lid side insulating plate 91.
なお、上記各実施形態は、以下のように変更して実施してもよい。
○ 第１実施形態において、蓋体側カバー５０に、先端が蓋体１４の内面１４ａに重なる凸部であり、且つ先端部分が同蓋体１４の凹部１６に重なる部分と同凹部１６に重ならない部分とを有する凸部を設けるようにしてもよい。
Each of the above embodiments may be modified as follows.
In the first embodiment, the cover body side cover 50 has a convex portion whose front end overlaps the inner surface 14a of the cover body 14, and a portion where the front end portion overlaps the concave portion 16 of the lid body 14 and a portion that does not overlap the concave portion 16 You may make it provide the convex part which has.
○ 第１実施形態において、二次電池１０が組み立てられた状態で、蓋側絶縁板５１の上記蓋体１４に重なる部分の外縁端と蓋体１４の凹部１６の開口端とが交差する形状であれば、蓋体１４の凹部１６の形状は任意に変更することができる。また、第２実施形態において、二次電池８０が組み立てられた状態で、蓋体側カバー９０の凹部９３の開口端と蓋体１４の凸部８７の外縁端とが交差するのであれば、凹部９３の形状や凸部８７の形状は任意に変更することができる。 In the first embodiment, in a state where the secondary battery 10 is assembled, the outer edge of the portion of the lid-side insulating plate 51 that overlaps the lid 14 and the opening end of the recess 16 of the lid 14 intersect each other. If there is, the shape of the recess 16 of the lid 14 can be arbitrarily changed. In the second embodiment, if the secondary battery 80 is assembled and the opening end of the concave portion 93 of the lid body side cover 90 and the outer edge of the convex portion 87 of the lid body 14 intersect, the concave portion 93 is provided. The shape of the convex portion 87 can be arbitrarily changed.
例えば図１３に概念的に示すように、第１実施形態において、蓋側絶縁板５１の外形を円形状とし、蓋体１４の凹部１０６を略三角形状としてもよい。また第２実施形態において、蓋体８４の凸部８７の外形を円形状とし、蓋体側カバー９０の凹部１１６を略三角形状とすることもできる。こうした図１３に示す例によれば、蓋側絶縁板５１（または凸部８７）と蓋体１４（または蓋体側カバー９０）とが３箇所（図中に斜線で示す部分）で接触するため、二次電池の内部構造を安定した構造にすることができる。 For example, as conceptually shown in FIG. 13, in the first embodiment, the outer shape of the lid-side insulating plate 51 may be circular, and the concave portion 106 of the lid 14 may be substantially triangular. Moreover, in 2nd Embodiment, the external shape of the convex part 87 of the cover body 84 can be made into circular shape, and the recessed part 116 of the cover body side cover 90 can also be made into substantially triangular shape. According to the example shown in FIG. 13, the lid-side insulating plate 51 (or the convex portion 87) and the lid body 14 (or the lid body-side cover 90) are in contact at three places (portions indicated by hatching in the drawing). The internal structure of the secondary battery can be made stable.
その他、図１４に概念的に示すように、第１実施形態において、蓋側絶縁板５１の外形を円形状とし、蓋体１４の凹部１２６を楕円形状の中央がくびれた断面形状（断面瓢箪形状）としてもよい。また第２実施形態において、蓋体８４の凸部８７の外形を円形状とし、蓋体側カバー９０の凹部１３６を断面瓢箪形状とすることもできる。 In addition, as conceptually shown in FIG. 14, in the first embodiment, the outer shape of the lid-side insulating plate 51 is a circular shape, and the concave portion 126 of the lid body 14 is a cross-sectional shape with a constricted center of the elliptical shape (cross-sectional shape of the cross-section ). Moreover, in 2nd Embodiment, the external shape of the convex part 87 of the cover body 84 can be made into circular shape, and the recessed part 136 of the cover body side cover 90 can also be made into cross-sectional saddle shape.
○ 図１５に概念的に示すように、第１実施形態において、蓋側絶縁板５１の外形を円形状とし、蓋体１４の凹部１４６を、全体が上記蓋側絶縁板５１に重なる部分に含まれる円弧形状としてもよい。また第２実施形態において、蓋体８４の凸部８７の外形を円形状とし、蓋体側カバー９０の凹部１５６を、全体が蓋体８４に重なる部分に含まれる円弧形状とすることもできる。図１５に示す例によれば、蓋側絶縁板５１（または凸部８７）の上記蓋体１４（または上記蓋体側カバー９０）に重なる部分を、上記凹部１４６（または凹部１５６）に重なるオーバーラップ部分と同凹部１４６（または凹部１５６）に重ならない非オーバーラップ部分とを有する形状にすることができる。そして、図１５に示す例では、蓋側絶縁板５１（または凸部８７）のオーバーラップ部分と非オーバーラップ部分との境界が極柱部４４の中心軸を中心とする円弧形状以外の形状の部分を含んでいる。そのため、二次電池の組み立てに際して上記境界に形成される段差と凹部１４６（または凹部１５６）との係合によって、蓋体１４，８４と蓋体側カバー５０，９０との相対回転が好適に抑えられるようになる。 15, as conceptually shown in FIG. 15, in the first embodiment, the outer shape of the lid-side insulating plate 51 is circular, and the concave portion 146 of the lid body 14 is included in a portion that entirely overlaps the lid-side insulating plate 51. It is good also as a circular arc shape. Further, in the second embodiment, the outer shape of the convex portion 87 of the lid 84 can be circular, and the concave 156 of the lid-side cover 90 can be an arc shape that is entirely included in the portion overlapping the lid 84. According to the example shown in FIG. 15, a portion of the lid-side insulating plate 51 (or the convex portion 87) that overlaps the lid body 14 (or the lid body-side cover 90) overlaps the concave portion 146 (or the concave portion 156). The shape can include a portion and a non-overlapping portion that does not overlap the concave portion 146 (or the concave portion 156). In the example shown in FIG. 15, the boundary between the overlap portion and the non-overlap portion of the lid-side insulating plate 51 (or the convex portion 87) has a shape other than the arc shape centering on the central axis of the pole column portion 44. Contains parts. Therefore, the relative rotation between the lid bodies 14 and 84 and the lid body side covers 50 and 90 is suitably suppressed by the engagement between the step formed at the boundary and the recess 146 (or the recess 156) when the secondary battery is assembled. It becomes like this.
○ 電極端子の鍔部４３の座面４３ａと蓋側絶縁板５１，９１との接触部分に、各実施形態の回り止め構造を採用してもよい。具体的には、（例１）〜（例３）に記載の構成などを採用することができる。
（例１）蓋側絶縁板５１，９１は前記鍔部４３に重なる部分に凹部を有する。鍔部４３の座面４３ａは、蓋側絶縁板５１，９１の凹部に重なる部分と同凹部に重ならない部分とを有する。
（例２）蓋側絶縁板５１，９１は前記鍔部４３に重なる部分に凹部を有する。鍔部４３の座面４３ａは、先端が上記蓋側絶縁板５１，９１に重なる形状の凸部を有する。この凸部は、その先端部分が蓋側絶縁板５１，９１の凹部に重なる部分と同凹部に重ならない部分とを有する。
（例３）鍔部４３は座面４３ａに凹部を有する。蓋側絶縁板５１，９１は、先端が座面４３ａに重なる形状の凸部を有する。この凸部は、その先端部分が鍔部４３の凹部に重なる部分と同凹部に重ならない部分とを有する。
The anti-rotation structure of each embodiment may be adopted in the contact portion between the seat surface 43a of the flange 43 of the electrode terminal and the lid-side insulating plates 51 and 91. Specifically, the configurations described in (Example 1) to (Example 3) can be employed.
(Example 1) The lid-side insulating plates 51 and 91 have a recess in a portion overlapping the flange portion 43. The seating surface 43a of the flange portion 43 has a portion that overlaps the recess of the lid-side insulating plates 51 and 91 and a portion that does not overlap the recess.
(Example 2) The lid-side insulating plates 51 and 91 have a recess in a portion overlapping the flange portion 43. The seat surface 43a of the collar portion 43 has a convex portion whose tip is overlapped with the lid-side insulating plates 51 and 91. This convex part has a part where the tip part overlaps the concave part of the lid-side insulating plates 51 and 91 and a part that does not overlap the concave part.
(Example 3) The collar part 43 has a recessed part in the seating surface 43a. The lid-side insulating plates 51 and 91 have convex portions whose ends overlap the seating surface 43a. The convex part has a part where the tip part overlaps the concave part of the flange part 43 and a part which does not overlap the concave part.
○ 電極端子の鍔部４３の外形は、少なくとも一部が蓋体１４，８４の挿通孔１５，８５の内径よりも大きい寸法であれば、任意に変更可能である。
○ 各実施形態の回り止め構造は、電極端子をケース１２，８２に締結固定するために、極柱部４４の外面の雄ねじ４４ａにナット５５を螺合する二次電池１０，８０に限らず、電極端子の極柱部にかしめ部材をかしめ固定（締結）する二次電池にも適用することができる。
The outer shape of the flange 43 of the electrode terminal can be arbitrarily changed as long as at least a part thereof is larger than the inner diameter of the insertion holes 15 and 85 of the lids 14 and 84.
The anti-rotation structure of each embodiment is not limited to the secondary batteries 10 and 80 in which the nut 55 is screwed into the external thread 44a on the outer surface of the pole post 44 in order to fasten and fix the electrode terminal to the cases 12 and 82. The present invention can also be applied to a secondary battery in which a caulking member is caulked and fixed (fastened) to a pole portion of an electrode terminal.
○ 電極組立体２０は、帯状の正極電極２１と負極電極２２との間に帯状のセパレータ２３を介在させて、これらを捲回軸周りに渦捲き状に捲回して構成された捲回型としてもよい。 The electrode assembly 20 is a winding type configured by interposing a strip-shaped separator 23 between a strip-shaped positive electrode 21 and a negative electrode 22 and winding them around a winding axis in a spiral manner. Also good.
○ ケース１２，８２の形状は、円柱状や、楕円柱状に形成してもよい。
○ 蓄電装置はニッケル水素二次電池や、電気二重層キャパシタとして具体化してもよい。
The case 12, 82 may be formed in a columnar shape or an elliptical column shape.
The power storage device may be embodied as a nickel hydride secondary battery or an electric double layer capacitor.
１０，８０…蓄電装置としての二次電池、１２，８２…ケース、１４，８４…蓋体、１５，８５…挿通孔、１６，９３，１０６，１１６，１２６，１３６，１４６，１５６…凹部、２０…電極組立体、４１…正極端子、４２…負極端子、４３…鍔部、４３ａ…座面、４４…極柱部、４４ａ…雄ねじ、５０，９０…蓋体側カバー、５０ａ，９０ａ…貫通孔、５５…ナット、８７…凸部。 DESCRIPTION OF SYMBOLS 10,80 ... Secondary battery as a power storage device, 12, 82 ... Case, 14, 84 ... Cover, 15, 85 ... Insertion hole, 16, 93, 106, 116, 126, 136, 146, 156 ... Recess, DESCRIPTION OF SYMBOLS 20 ... Electrode assembly, 41 ... Positive electrode terminal, 42 ... Negative electrode terminal, 43 ... Gutter part, 43a ... Seat surface, 44 ... Polar pole part, 44a ... Male screw, 50, 90 ... Cover body side cover, 50a, 90a ... Through-hole 55 ... nuts, 87 ... convex parts.
Claims (10)
少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、
前記ケースの外方から前記極柱部に締結される締結部材と、
前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える蓄電装置の製造方法であって、
前記ケースとして、前記介設部材が重なる部分に凹部が形成されたものを用い、
前記介設部材として、前記ケースに重なる部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有する形状のものを用い、
前記凹部は、その開口端と前記介設部材の前記ケースに重なる部分の外縁端とが交差する形状に形成されており、
前記ケース内における前記挿通孔の周縁と前記電極端子の前記鍔部との間に前記介設部材を配置した状態で前記締結部材を前記極柱部に締結して、前記ケースと前記電極端子とを締結固定する固定工程を含むことを特徴とする蓄電装置の製造方法。 A case having an insertion hole for communicating the inside and the outside;
At least a portion has a pole column portion having a flange portion having a size larger than the inner diameter of the insertion hole, the flange portion is disposed in the case, and the pole column portion is disposed in the insertion hole. An electrode terminal provided on the case in a state where the tip of the pole post protrudes out of the case, and
A fastening member fastened to the pole post from the outside of the case;
In the case, a method for manufacturing a power storage device comprising: an interposed member at least partially disposed between a peripheral edge of the insertion hole and the flange portion;
As the case, a case in which a recess is formed in a portion where the interposed member overlaps,
As the interposed member, a member having a shape in which a portion overlapping the case overlaps the recess and a portion not overlapping the recess ,
The concave portion is formed in a shape in which an opening end thereof and an outer edge end of a portion overlapping the case of the interposed member intersect with each other,
The fastening member is fastened to the pole portion in a state where the interposed member is disposed between a peripheral edge of the insertion hole in the case and the flange portion of the electrode terminal, and the case and the electrode terminal A method for manufacturing a power storage device comprising a fixing step of fastening and fixing the battery.
前記介設部材は、前記極柱部が挿通される貫通孔が形成され、前記ケースに重なる部分の外縁端が前記貫通孔の周囲を囲う形状に形成される請求項１に記載の蓄電装置の製造方法。 The concave portion is formed in a shape in which the opening end surrounds the periphery of the insertion hole,
The interposition member, said through hole pole portion is inserted is formed, the electric storage device according to claim 1, the outer end of the portion overlapping the casing is formed in a shape surrounding the periphery of the through hole Production method.
少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、
前記ケースの外方から前記極柱部に締結される締結部材と、
前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える蓄電装置の製造方法であって、
前記介設部材として、前記ケースに重なる部分に凹部が形成されたものを用い、
前記ケースとして、先端部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有する凸部が形成されたものを用いて、
前記ケース内における前記挿通孔の周縁と前記電極端子の前記鍔部との間に前記介設部材を配置した状態で前記締結部材を前記極柱部に締結して、前記ケースと前記電極端子とを締結固定する固定工程を含むことを特徴とする蓄電装置の製造方法。 A case having an insertion hole for communicating the inside and the outside;
At least a portion has a pole column portion having a flange portion having a size larger than the inner diameter of the insertion hole, the flange portion is disposed in the case, and the pole column portion is disposed in the insertion hole. An electrode terminal provided on the case in a state where the tip of the pole post protrudes out of the case, and
A fastening member fastened to the pole post from the outside of the case;
In the case, a method for manufacturing a power storage device comprising: an interposed member at least partially disposed between a peripheral edge of the insertion hole and the flange portion;
As the interposition member, a member in which a recess is formed in a portion overlapping the case,
As the case, using a case where a convex portion having a portion where the tip portion overlaps the concave portion and a portion that does not overlap the concave portion is formed,
The fastening member is fastened to the pole portion in a state where the interposed member is disposed between a peripheral edge of the insertion hole in the case and the flange portion of the electrode terminal, and the case and the electrode terminal A method for manufacturing a power storage device comprising a fixing step of fastening and fixing the battery.
前記介設部材は、前記極柱部が挿通される貫通孔が形成され、前記凹部の開口端が前記貫通孔の周囲を囲う形状に形成される請求項３または請求項４に記載の蓄電装置の製造方法。 The convex portion is formed in a shape in which the outer edge of the tip portion surrounds the insertion hole,
The interposition member, the pole portion is formed with a through hole is inserted, the power storage device according to claim 3 or claim 4 opening end of the concave portion is formed in a shape surrounding the periphery of the through hole Manufacturing method.
少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、
前記ケースの外方から前記極柱部に締結される締結部材と、
前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える蓄電装置であって、
当該蓄電装置は、前記締結部材と前記鍔部との間で、前記ケースと前記鍔部とが前記介設部材を挟持させた状態で締結固定される締結固定構造を有し、
前記ケースは、前記介設部材に重なる部分に凹部を有し、
前記介設部材は、前記ケースに重なる部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有し、
前記凹部は、その開口端と前記介設部材の前記ケースに重なる部分の外縁端とが交差する形状であることを特徴とする蓄電装置。 A case having an insertion hole for communicating the inside and the outside;
At least a portion has a pole column portion having a flange portion having a size larger than the inner diameter of the insertion hole, the flange portion is disposed in the case, and the pole column portion is disposed in the insertion hole. An electrode terminal provided on the case in a state where the tip of the pole post protrudes out of the case, and
A fastening member fastened to the pole post from the outside of the case;
An electrical storage device comprising an interposed member disposed at least partially between a periphery of the insertion hole and the flange in the case,
The power storage device includes a fastening and fixing structure that is fastened and fixed in a state where the case and the flange sandwich the interposed member between the fastening member and the flange.
The case has a recess in a portion overlapping the interposed member,
The interposition member includes possess a portion partially overlapping the casing overlaps the recess and a portion that does not overlap the concave portion,
The power storage device , wherein the recess has a shape in which an opening end thereof intersects an outer edge of a portion of the interposition member that overlaps the case .
前記介設部材は、前記極柱部が挿通される貫通孔を有し、前記ケースに重なる部分の外縁端が前記貫通孔の周囲を囲う形状である請求項６に記載の蓄電装置。 The concave portion has a shape in which an opening end surrounds the insertion hole,
The power storage device according to claim 6 , wherein the interposed member has a through hole through which the pole column portion is inserted, and an outer edge of a portion overlapping the case surrounds the through hole.
少なくとも一部が前記挿通孔の内径よりも大きい寸法である鍔部を備えた極柱部を有し、前記鍔部を前記ケース内に配置した状態であり、且つ前記挿通孔に前記極柱部を挿通した状態であり、且つ前記極柱部の先端が前記ケース外に突出した状態で前記ケースに設けられた電極端子と、
前記ケースの外方から前記極柱部に締結される締結部材と、
前記ケース内において前記挿通孔の周縁と前記鍔部との間に少なくとも一部分が配置される介設部材と、を備える蓄電装置であって、
当該蓄電装置は、前記締結部材と前記鍔部との間で、前記ケースと前記鍔部とが前記介設部材を挟持させた状態で締結固定される締結固定構造を有し、
前記介設部材は、前記ケースに重なる部分に凹部を有し、
前記ケースは、先端部分が前記凹部に重なる部分と、前記凹部に重ならない部分とを有する凸部を備えることを特徴とする蓄電装置。 A case having an insertion hole for communicating the inside and the outside;
At least a portion has a pole column portion having a flange portion having a size larger than the inner diameter of the insertion hole, the flange portion is disposed in the case, and the pole column portion is disposed in the insertion hole. An electrode terminal provided on the case in a state where the tip of the pole post protrudes out of the case, and
A fastening member fastened to the pole post from the outside of the case;
An electrical storage device comprising an interposed member disposed at least partially between a periphery of the insertion hole and the flange in the case,
The power storage device includes a fastening and fixing structure that is fastened and fixed in a state where the case and the flange sandwich the interposed member between the fastening member and the flange.
The interposed member has a recess in a portion overlapping the case,
The case includes a power storage device having a convex portion having a portion having a tip portion overlapping the concave portion and a portion not overlapping the concave portion.
前記介設部材は、前記極柱部が挿通される貫通孔を有し、前記凹部の開口端が前記貫通孔の周囲を囲う形状である請求項８または請求項９に記載の蓄電装置。 The convex portion has a shape in which an outer edge of a tip portion surrounds the insertion hole,
The interposition member has a through hole into which the pole column portion is inserted, the power storage device according to claim 8 or claim 9 open end of the recess has a shape surrounding the periphery of the through hole.
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