JP6197656B2 - Power storage device - Google Patents
Power storage device Download PDFInfo
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- JP6197656B2 JP6197656B2 JP2014003527A JP2014003527A JP6197656B2 JP 6197656 B2 JP6197656 B2 JP 6197656B2 JP 2014003527 A JP2014003527 A JP 2014003527A JP 2014003527 A JP2014003527 A JP 2014003527A JP 6197656 B2 JP6197656 B2 JP 6197656B2
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- Prior art keywords
- seal member
- flange
- injection hole
- liquid injection
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims description 90
- 230000002093 peripheral effect Effects 0.000 claims description 72
- 238000002347 injection Methods 0.000 claims description 70
- 239000007924 injection Substances 0.000 claims description 70
- 239000007788 liquid Substances 0.000 claims description 51
- 239000003792 electrolyte Substances 0.000 claims description 13
- 239000008151 electrolyte solution Substances 0.000 description 12
- 230000007423 decrease Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000011888 foil Substances 0.000 description 7
- 239000007773 negative electrode material Substances 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Filling, Topping-Up Batteries (AREA)
Description
本発明は、ケース内に電極組立体及び電解液が収容された蓄電装置に関する。 The present invention relates to a power storage device in which an electrode assembly and an electrolytic solution are housed in a case.
二次電池やキャパシタのような蓄電装置は再充電が可能であり、繰り返し使用することができるため電源として広く利用されている。一般に、容量の大きな二次電池（蓄電装置）はケースを備え、そのケース内に電極組立体及び電解液が収容されている。二次電池の組立は、ケースの本体部材内に電極組立体を収容した後、ケースの蓋部材を本体部材に溶接し、本体部材を閉塞する。その後、蓋部材の注液孔から電解液をケース内に注入した後、注液孔を封止する。 Power storage devices such as secondary batteries and capacitors are widely used as power sources because they can be recharged and can be used repeatedly. Generally, a secondary battery (power storage device) having a large capacity includes a case, and an electrode assembly and an electrolytic solution are accommodated in the case. In assembling the secondary battery, after the electrode assembly is accommodated in the main body member of the case, the lid member of the case is welded to the main body member to close the main body member. Then, after pouring electrolyte solution into the case from the liquid injection hole of the lid member, the liquid injection hole is sealed.
注液孔の封止構造として、リベットを用いたものがある（例えば特許文献１参照）。図１０に示すように、特許文献１の密閉電池では、封口板８１の電解液注入孔８１ａは、リベット８３で封止されている。リベット８３は、軸部８４、電解液注入孔８１ａの周縁部表面を覆う鍔部８５、及び電解液注入孔８１ａの周縁部裏面を覆うカシメ部８６を備える。また、リベット８３の鍔部８５と、封口板８１との間には、電解液注入孔８１ａの周縁部表面、及び鍔部８５の裏面に密接したガスケット８８が介装されている。また、封口板８１において、電解液注入孔８１ａの周縁部表面には、環状の第１凸部８９ａと、外側に位置する環状の第２凸部８９ｂと、が設けられている。そして、ガスケット８８により、封口板８１における電解液注入孔８１ａの周縁部表面、及び鍔部８５の裏面がシールされ、電解液注入孔８１ａからの電解液漏れが抑制される。 As a liquid injection hole sealing structure, there is one using a rivet (see, for example, Patent Document 1). As shown in FIG. 10, in the sealed battery of Patent Document 1, the electrolyte injection hole 81 a of the sealing plate 81 is sealed with a rivet 83. The rivet 83 includes a shaft portion 84, a flange portion 85 that covers the peripheral surface of the electrolyte injection hole 81a, and a crimping portion 86 that covers the back surface of the peripheral portion of the electrolyte injection hole 81a. Further, a gasket 88 in close contact with the peripheral surface of the electrolyte injection hole 81 a and the back surface of the flange 85 is interposed between the flange 85 of the rivet 83 and the sealing plate 81. In the sealing plate 81, an annular first convex portion 89a and an annular second convex portion 89b located on the outer side are provided on the peripheral surface of the electrolyte solution injection hole 81a. And the peripheral surface of the electrolyte solution injection hole 81a in the sealing plate 81 and the back surface of the collar portion 85 are sealed by the gasket 88, and electrolyte solution leakage from the electrolyte solution injection hole 81a is suppressed.
ところで、電解液注入孔８１ａの封止作業の簡易化を図るため、リベット８３の軸部８４にガスケット８８を締り嵌めで嵌合し、一体に組み付けておくことが考えられる。このようにすると、軸部８４を電解液注入孔８１ａに挿入するだけで、ガスケット８８も、封口板８１における電解液注入孔８１ａの周縁部表面に配置できるためである。 By the way, in order to simplify the sealing operation of the electrolyte injection hole 81a, it is conceivable that the gasket 88 is fitted into the shaft portion 84 of the rivet 83 by an interference fit and assembled together. This is because the gasket 88 can be disposed on the peripheral surface of the electrolyte injection hole 81a in the sealing plate 81 only by inserting the shaft portion 84 into the electrolyte injection hole 81a.
しかし、ガスケット８８をリベット８３の軸部８４に締り嵌めで嵌合すると、ガスケット８８の内周面は軸部８４の外周面に密接し、ガスケット８８の内周部が圧縮されて厚みを増したように変形した状態となっている。このため、電解液注入孔８１ａの封止のため、所定の軸力でカシメ部８６を形成したとき、ガスケット８８の面圧が内周部で過度に高くなるために、ガスケット８８におけるその他の箇所で作用する面圧が低下する。さらには、ガスケット８８の面圧が内周部で過度に高くなるため、ガスケット８８を他より強く圧縮してシール性能を高めている部位、すなわち、第１凸部８９ａ及び第２凸部８９ｂの先端面と対向する鍔部８５の裏面との間においてもガスケット８８に生じる面圧が低下する。このため、ガスケット８８による電解液注入孔８１ａのシール性が低下してしまう虞がある。 However, when the gasket 88 is fitted into the shaft portion 84 of the rivet 83 with an interference fit, the inner peripheral surface of the gasket 88 is in close contact with the outer peripheral surface of the shaft portion 84, and the inner peripheral portion of the gasket 88 is compressed to increase the thickness. It is in a deformed state. For this reason, when the caulking portion 86 is formed with a predetermined axial force for sealing the electrolyte injection hole 81a, the surface pressure of the gasket 88 becomes excessively high at the inner peripheral portion. The surface pressure acting on the is reduced. Furthermore, since the surface pressure of the gasket 88 becomes excessively high at the inner peripheral portion, the portions where the gasket 88 is compressed more strongly than others to improve the sealing performance, that is, the first convex portion 89a and the second convex portion 89b. The surface pressure generated in the gasket 88 also decreases between the front end surface and the back surface of the flange portion 85 facing the front end surface. For this reason, there exists a possibility that the sealing performance of the electrolyte solution injection hole 81a by the gasket 88 may fall.
本発明は、シール部材によって注液孔をシールすることができる蓄電装置を提供することにある。 An object of the present invention is to provide a power storage device capable of sealing a liquid injection hole with a seal member.
上記問題点を解決するための蓄電装置は、ケース内に電極組立体及び電解液が収容され、前記ケースの壁部に前記電解液の注液孔を有するとともに、前記注液孔の封止部材を備え、前記封止部材は、有底筒状の胴部と、前記胴部の軸方向一端のフランジと、前記胴部への締り嵌めによって一体に組み付けられた環状のシール部材と、を備え、前記封止部材は、前記胴部が軸方向他端から前記注液孔に挿通されるとともに、前記ケース内に位置する部分に、前記胴部を内側から拡径させたかしめ部を有し、前記かしめ部と前記フランジとで前記壁部に締結されるとともに、前記フランジと前記壁部との間に前記シール部材が挟持されており、挟持に伴う前記シール部材の内周部の変形を逃がすための逃がし空間を有し、前記逃がし空間は、前記胴部とフランジとの境界部に凹設された溝と、前記シール部材の内周部との間に区画されていることを要旨とする。 A power storage device for solving the above-mentioned problems includes an electrode assembly and an electrolytic solution housed in a case, and has a liquid injection hole on the wall of the case, and a sealing member for the liquid injection hole The sealing member includes a bottomed cylindrical body, a flange at one axial end of the body, and an annular seal member assembled integrally by an interference fit to the body. The sealing member includes a caulking portion in which the body portion is inserted from the other end in the axial direction into the liquid injection hole and the diameter of the body portion is increased from the inside at a portion located in the case. The caulking portion and the flange are fastened to the wall portion, and the seal member is sandwiched between the flange and the wall portion, and the inner peripheral portion of the seal member is deformed due to the sandwiching. have a relief space for escape, the relief space, the Parts and the recessed by grooves in the boundary portion between the flange and gist that is defined between the inner peripheral portion of the sealing member.
これによれば、かしめ部とフランジとで封止部材を壁部に締結し、シール部材に軸力が作用したとき、シール部材は、軸方向へ圧縮される。よって、シール部材における壁部への対向面が壁部の外壁面に密接するとともに、フランジへの対向面がフランジに密接して、各密接により注液孔がシール部材によって封止される。この際、胴部への締り嵌めによって一体に組み付けられたシール部材の面圧が内周部で過度に高くなることが抑制される。 According to this, when the sealing member is fastened to the wall portion by the caulking portion and the flange, and the axial force acts on the sealing member, the sealing member is compressed in the axial direction. Therefore, the surface facing the wall portion of the seal member is in close contact with the outer wall surface of the wall portion, the surface facing the flange is in close contact with the flange, and the liquid injection hole is sealed by the seal member. At this time, it is suppressed that the surface pressure of the seal member integrally assembled by the interference fit to the body portion becomes excessively high at the inner peripheral portion.
すなわち、シール部材は、軸力を受けて軸方向へ圧縮されるが、シール部材は内周部で逃がし空間へ逃げるように変形する。このため、軸方向への面圧がシール部材の内周部だけで過度に高くなってしまうことが抑制されるとともに、シール部材と壁部との間の面圧、及びシール部材とフランジとの間の面圧の低下が抑制され、注液孔のシール性が確保できる。 That is, the seal member receives axial force and is compressed in the axial direction, but the seal member is deformed so as to escape into the escape space at the inner periphery. For this reason, the surface pressure in the axial direction is suppressed from becoming excessively high only at the inner peripheral portion of the seal member, and the surface pressure between the seal member and the wall portion, and between the seal member and the flange are suppressed. The decrease in the surface pressure is suppressed, and the sealing performance of the injection hole can be secured.
また、フランジを有する封止部材では、金属製であればプレス成形されるが、製造上、フランジと胴部との境界部がアール状に形成されるのが避けられない。このため、アール状を有するままフランジでシール部材を挟持すると、シール部材の内周部は、アール状の部分によって圧縮されてしまう。しかし、アール状となるべく部位に溝を設け、逃がし空間を区画することで、アール状のままでは圧縮されてしまう部分を逃がし空間に逃がすことができ、シール部材の面圧が内周部だけで過度に高くなってしまうことを抑制できる。その結果、シール部材と壁部との間の面圧、及びシール部材とフランジとの間の面圧の低下が抑制され、注液孔のシール性が確保できる。 Further, the sealing member having a flange, but are press-formed, if made of metal, manufacture, inevitably the boundary portion between the flange and the body are formed in a round shape. For this reason, if the seal member is sandwiched between the flanges while having a round shape, the inner peripheral portion of the seal member is compressed by the round portion. However, by providing grooves as much as possible in the rounded shape and partitioning the escape space, the part that is compressed in the rounded shape can be escaped to the space, and the surface pressure of the seal member is only at the inner peripheral part It can suppress becoming high too much. As a result, a decrease in the surface pressure between the seal member and the wall portion and the surface pressure between the seal member and the flange is suppressed, and the sealing performance of the liquid injection hole can be ensured.
また、蓄電装置について、前記逃がし空間は、前記壁部の外壁面で前記注液孔の周囲に形成された凹部と、前記胴部の外周面と、前記シール部材の内周部との間に区画されていてもよい。 In the power storage device, the escape space is formed between a recess formed around the liquid injection hole on the outer wall surface of the wall portion, an outer peripheral surface of the body portion, and an inner peripheral portion of the seal member. It may be partitioned.
これによれば、シール部材に軸力が作用したとき、シール部材の内周部を壁部の逃がし空間へ逃がすことができる。このため、シール部材の面圧が、その内周部だけで過度に高くなってしまうことを抑制できる。その結果、シール部材と壁部との間の面圧、及びシール部材とフランジとの間の面圧の低下が抑制され、注液孔のシール性が確保できる。 According to this, when an axial force acts on the seal member, the inner peripheral portion of the seal member can be released to the escape space of the wall portion. For this reason, it can suppress that the surface pressure of a sealing member becomes high too much only in the inner peripheral part. As a result, a decrease in the surface pressure between the seal member and the wall portion and the surface pressure between the seal member and the flange is suppressed, and the sealing performance of the liquid injection hole can be ensured.
上記問題点を解決するための蓄電装置は、ケース内に電極組立体及び電解液が収容され、前記ケースの壁部に前記電解液の注液孔を有するとともに、前記注液孔の封止部材を備え、前記封止部材は、有底筒状の胴部と、前記胴部の軸方向一端のフランジと、前記胴部への締り嵌めによって一体に組み付けられた環状のシール部材と、を備え、前記封止部材は、前記胴部が軸方向他端から前記注液孔に挿通されるとともに、前記ケース内に位置する部分に、前記胴部を内側から拡径させたかしめ部を有し、前記かしめ部と前記フランジとで前記壁部に締結されるとともに、前記フランジと前記壁部との間に前記シール部材が挟持されており、挟持に伴う前記シール部材の内周部の変形を逃がすための逃がし空間を有し、前記逃がし空間は、前記シール部材の内周縁に沿って形成された面取り部と、前記胴部の外周面と、前記面取り部の対向するフランジ又は前記壁部の外壁面との間に区画されていることを要旨とする。 A power storage device for solving the above-mentioned problems includes an electrode assembly and an electrolytic solution housed in a case, and has a liquid injection hole on the wall of the case, and a sealing member for the liquid injection hole The sealing member includes a bottomed cylindrical body, a flange at one axial end of the body, and an annular seal member assembled integrally by an interference fit to the body. The sealing member includes a caulking portion in which the body portion is inserted from the other end in the axial direction into the liquid injection hole and the diameter of the body portion is increased from the inside at a portion located in the case. The caulking portion and the flange are fastened to the wall portion, and the seal member is sandwiched between the flange and the wall portion, and the inner peripheral portion of the seal member is deformed due to the sandwiching. has a relief space for escape, the relief space, the A chamfered portion formed along the inner periphery of the seal member, and the outer circumferential surface of the barrel, and the gist that you have been defined between the outer wall surface of the flange or the wall opposite the chamfered portion To do .
これによれば、かしめ部とフランジとで封止部材を壁部に締結し、シール部材に軸力が作用したとき、シール部材は、軸方向へ圧縮される。よって、シール部材における壁部への対向面が壁部の外壁面に密接するとともに、フランジへの対向面がフランジに密接して、各密接により注液孔がシール部材によって封止される。この際、胴部への締り嵌めによって一体に組み付けられたシール部材の面圧が内周部で過度に高くなることが抑制される。
すなわち、シール部材は、軸力を受けて軸方向へ圧縮されるが、シール部材は内周部で逃がし空間へ逃げるように変形する。このため、軸方向への面圧がシール部材の内周部だけで過度に高くなってしまうことが抑制されるとともに、シール部材と壁部との間の面圧、及びシール部材とフランジとの間の面圧の低下が抑制され、注液孔のシール性が確保できる。
また、シール部材に軸力が作用したとき、シール部材の面取り部が逃がし空間に入り込むように変形する。このため、シール部材の面圧が、その内周部だけで過度に高くなってしまうことを抑制できる。その結果、シール部材と壁部との間の面圧、及びシール部材とフランジとの間の面圧の低下が抑制され、注液孔のシール性が確保できる。
According to this, when the sealing member is fastened to the wall portion by the caulking portion and the flange, and the axial force acts on the sealing member, the sealing member is compressed in the axial direction. Therefore, the surface facing the wall portion of the seal member is in close contact with the outer wall surface of the wall portion, the surface facing the flange is in close contact with the flange, and the liquid injection hole is sealed by the seal member. At this time, it is suppressed that the surface pressure of the seal member integrally assembled by the interference fit to the body portion becomes excessively high at the inner peripheral portion.
That is, the seal member receives axial force and is compressed in the axial direction, but the seal member is deformed so as to escape into the escape space at the inner periphery. For this reason, the surface pressure in the axial direction is suppressed from becoming excessively high only at the inner peripheral portion of the seal member, and the surface pressure between the seal member and the wall portion, and between the seal member and the flange are suppressed. The decrease in the surface pressure is suppressed, and the sealing performance of the injection hole can be secured.
Further, when an axial force acts on the seal member, the chamfered portion of the seal member is deformed so as to enter the escape space. For this reason, it can suppress that the surface pressure of a sealing member becomes high too much only in the inner peripheral part. As a result, a decrease in the surface pressure between the seal member and the wall portion and the surface pressure between the seal member and the flange is suppressed, and the sealing performance of the liquid injection hole can be ensured.
上記問題点を解決するための蓄電装置は、ケース内に電極組立体及び電解液が収容され、前記ケースの壁部に前記電解液の注液孔を有するとともに、前記注液孔の封止部材を備え、前記封止部材は、有底筒状の胴部と、前記胴部の軸方向一端のフランジと、前記胴部への締り嵌めによって一体に組み付けられた環状のシール部材と、を備え、前記封止部材は、前記胴部が軸方向他端から前記注液孔に挿通されるとともに、前記ケース内に位置する部分に、前記胴部を内側から拡径させたかしめ部を有し、前記かしめ部と前記フランジとで前記壁部に締結されるとともに、前記フランジと前記壁部との間に前記シール部材が挟持されており、挟持に伴う前記シール部材の内周部の変形を逃がすための逃がし空間を有し、前記シール部材は、前記胴部が挿入された環状の基部を備えるとともに、該基部の内周面から突出し、かつ前記基部からの突出方向の先端が前記胴部の外周面に締り嵌めする突片を複数備え、前記突片は前記基部の周方向に間隔を空けて設けられており、前記逃がし空間は、周方向に隣り合う突片同士の間と、前記胴部の外周面と、前記基部の内周面との間に区画されていることを要旨とする。 A power storage device for solving the above-mentioned problems includes an electrode assembly and an electrolytic solution housed in a case, and has a liquid injection hole on the wall of the case, and a sealing member for the liquid injection hole The sealing member includes a bottomed cylindrical body, a flange at one axial end of the body, and an annular seal member assembled integrally by an interference fit to the body. The sealing member includes a caulking portion in which the body portion is inserted from the other end in the axial direction into the liquid injection hole and the diameter of the body portion is increased from the inside at a portion located in the case. The caulking portion and the flange are fastened to the wall portion, and the seal member is sandwiched between the flange and the wall portion, and the inner peripheral portion of the seal member is deformed due to the sandwiching. has a relief space for escape, the seal member, the And a plurality of projecting pieces that protrude from an inner peripheral surface of the base portion and that have a distal end in a projecting direction from the base portion tightly fit to an outer peripheral surface of the body portion, Are provided at intervals in the circumferential direction of the base portion, and the escape space is between the circumferentially adjacent projecting pieces, the outer peripheral surface of the trunk portion, and the inner peripheral surface of the base portion. the gist that you have is partitioned into.
これによれば、かしめ部とフランジとで封止部材を壁部に締結し、シール部材に軸力が作用したとき、シール部材は、軸方向へ圧縮される。よって、シール部材における壁部への対向面が壁部の外壁面に密接するとともに、フランジへの対向面がフランジに密接して、各密接により注液孔がシール部材によって封止される。この際、胴部への締り嵌めによって一体に組み付けられたシール部材の面圧が内周部で過度に高くなることが抑制される。
すなわち、シール部材は、軸力を受けて軸方向へ圧縮されるが、シール部材は内周部で逃がし空間へ逃げるように変形する。このため、軸方向への面圧がシール部材の内周部だけで過度に高くなってしまうことが抑制されるとともに、シール部材と壁部との間の面圧、及びシール部材とフランジとの間の面圧の低下が抑制され、注液孔のシール性が確保できる。
また、シール部材の基部及び突片に軸力が作用したとき、基部及び突片は軸力を受けて軸方向へ圧縮される。突片の先端は胴部の外周面に締り嵌めされており、突出方向の先端へ向けた変形が抑制されるが、突片の突出方向に延びる側面部は、逃がし空間へ逃げることで変形することができる。このため、軸方向への面圧がシール部材の突片側だけで過度に高くなってしまうことが抑制できる。その結果、シール部材と壁部との間の面圧、及びシール部材とフランジとの間の面圧の低下が抑制され、注液孔のシール性が確保できる。
According to this, when the sealing member is fastened to the wall portion by the caulking portion and the flange, and the axial force acts on the sealing member, the sealing member is compressed in the axial direction. Therefore, the surface facing the wall portion of the seal member is in close contact with the outer wall surface of the wall portion, the surface facing the flange is in close contact with the flange, and the liquid injection hole is sealed by the seal member. At this time, it is suppressed that the surface pressure of the seal member integrally assembled by the interference fit to the body portion becomes excessively high at the inner peripheral portion.
That is, the seal member receives axial force and is compressed in the axial direction, but the seal member is deformed so as to escape into the escape space at the inner periphery. For this reason, the surface pressure in the axial direction is suppressed from becoming excessively high only at the inner peripheral portion of the seal member, and the surface pressure between the seal member and the wall portion, and between the seal member and the flange are suppressed. The decrease in the surface pressure is suppressed, and the sealing performance of the injection hole can be secured.
Further, when an axial force acts on the base and the projecting piece of the seal member, the base and the projecting piece receive the axial force and are compressed in the axial direction. The tip of the projecting piece is tightly fitted to the outer peripheral surface of the body, and deformation toward the tip in the projecting direction is suppressed, but the side part extending in the projecting direction of the projecting piece is deformed by escaping to the escape space. be able to. For this reason, it can suppress that the surface pressure to an axial direction becomes high too much only by the protrusion piece side of a sealing member. As a result, a decrease in the surface pressure between the seal member and the wall portion and the surface pressure between the seal member and the flange is suppressed, and the sealing performance of the liquid injection hole can be ensured.
前記蓄電装置は二次電池である。 The power storage device is a secondary battery.
本発明によれば、シール部材によって注液孔をシールすることができる。 According to the present invention, the liquid injection hole can be sealed by the sealing member.
以下、蓄電装置を二次電池に具体化した一実施形態を図１〜図４にしたがって説明する。
図１及び図２に示すように、二次電池１０は、ケース１１に電極組立体１２及び電解液１８が収容されている。ケース１１は、有底四角筒状の本体部材１３と、本体部材１３に電極組立体１２を挿入するための開口部１３ａを塞ぐ矩形平板状の蓋１４とからなる。本実施形態では、蓋１４がケース１１を構成する壁部に相当する。本体部材１３と蓋１４は、いずれも金属製（例えばステンレス製やアルミニウム製）である。二次電池１０は角型電池であり、リチウムイオン電池である。
Hereinafter, an embodiment in which the power storage device is embodied as a secondary battery will be described with reference to FIGS.
As shown in FIGS. 1 and 2, in the secondary battery 10, an electrode assembly 12 and an electrolytic solution 18 are accommodated in a case 11. The case 11 includes a bottomed rectangular tube-shaped main body member 13 and a rectangular flat plate-shaped lid 14 that closes an opening 13 a for inserting the electrode assembly 12 into the main body member 13. In the present embodiment, the lid 14 corresponds to a wall portion constituting the case 11. The main body member 13 and the lid 14 are both made of metal (for example, made of stainless steel or aluminum). The secondary battery 10 is a prismatic battery and is a lithium ion battery.
電極組立体１２には、正極端子１５と負極端子１６が電気的に接続されている。そして、正極端子１５及び負極端子１６には、ケース１１から絶縁するためのリング状の絶縁部材１７がそれぞれ取り付けられている。また、正極端子１５と負極端子１６は、蓋１４からケース１１外に露出している。 A positive electrode terminal 15 and a negative electrode terminal 16 are electrically connected to the electrode assembly 12. Ring-shaped insulating members 17 for insulating from the case 11 are attached to the positive terminal 15 and the negative terminal 16, respectively. Further, the positive terminal 15 and the negative terminal 16 are exposed from the lid 14 to the outside of the case 11.
電極組立体１２は、正極電極、負極電極、及び正極電極と負極電極とを絶縁するセパレータを有する。正極電極は、正極金属箔（アルミニウム箔）の両面に正極活物質を備える。負極電極は、負極金属箔（銅箔）の両面に負極活物質を備える。そして、電極組立体１２は、複数の正極電極と複数の負極電極が交互に積層されるとともに、両電極の間にセパレータが介在された積層構造である。 The electrode assembly 12 includes a positive electrode, a negative electrode, and a separator that insulates the positive electrode and the negative electrode. The positive electrode includes a positive electrode active material on both sides of a positive metal foil (aluminum foil). A negative electrode is equipped with a negative electrode active material on both surfaces of negative electrode metal foil (copper foil). The electrode assembly 12 has a laminated structure in which a plurality of positive electrodes and a plurality of negative electrodes are alternately laminated, and a separator is interposed between the two electrodes.
蓋１４において、ケース１１の内側に臨む面を内壁面１４ａとし、ケース１１の外側に臨む面を外壁面１４ｂとする。蓋１４は、その厚み方向に貫通する注液孔１４ｃを備える。注液孔１４ｃは、封止部材２０によって封止され、ケース１１内からのガス及び電解液１８の漏れが防止されている。 In the lid 14, a surface facing the inside of the case 11 is an inner wall surface 14 a and a surface facing the outside of the case 11 is an outer wall surface 14 b. The lid | cover 14 is equipped with the liquid injection hole 14c penetrated in the thickness direction. The liquid injection hole 14c is sealed by the sealing member 20, and leakage of gas and the electrolyte 18 from the inside of the case 11 is prevented.
まず、注液孔１４ｃに挿入される前の封止部材２０について説明する。
図１及び図３に示すように、封止部材２０は、軸方向一端に開口するとともに、軸方向他端に底壁２１ａを有する中空円筒状の胴部２１と、この胴部２１の軸方向一端の開口縁に設けられた環状のフランジ２２と、胴部２１の外周面に嵌合された円環状のシール部材４０と、胴部２１の内部に収容されるマンドレル３０と、を有する。胴部２１（底壁２１ａ）とフランジ２２は一体でアルミニウム製であり、プレス成形により一体に形成される。また、シール部材４０は樹脂製であるがゴム製でもよい。シール部材４０の内径は、胴部２１の外径より僅かに小さいため、シール部材４０は内周部が圧縮されて変形した状態である。すなわち、シール部材４０は胴部２１に締り嵌めで嵌合している。
First, the sealing member 20 before being inserted into the liquid injection hole 14c will be described.
As shown in FIGS. 1 and 3, the sealing member 20 has a hollow cylindrical body portion 21 having an opening at one end in the axial direction and a bottom wall 21 a at the other end in the axial direction, and the axial direction of the body portion 21. An annular flange 22 provided at an opening edge at one end, an annular seal member 40 fitted to the outer peripheral surface of the trunk portion 21, and a mandrel 30 accommodated in the trunk portion 21. The trunk | drum 21 (bottom wall 21a) and the flange 22 are integrally made from aluminum, and are integrally formed by press molding. The seal member 40 is made of resin, but may be made of rubber. Since the inner diameter of the seal member 40 is slightly smaller than the outer diameter of the body portion 21, the seal member 40 is in a state where the inner peripheral portion is compressed and deformed. That is, the seal member 40 is fitted to the body portion 21 with an interference fit.
胴部２１の内部は、軸方向他端側（底壁２１ａ側）にマンドレル３０の大径部３１より大径の収容部２１ｄが形成されており、収容部２１ｄに連接してフランジ２２に向けてテーパし、かつ大径部３１より小径の（縮径された）連通部２１ｅが形成されている。胴部２１は、連通部２１ｅよりも軸方向一端側に、内径が連通部２１ｅよりも拡径した挿通部２１ｆを備える。 The inside of the trunk portion 21 is formed with an accommodating portion 21d having a diameter larger than that of the large-diameter portion 31 of the mandrel 30 on the other axial end side (bottom wall 21a side), and is connected to the accommodating portion 21d toward the flange 22. Thus, a communication portion 21e that is tapered and smaller in diameter than the large diameter portion 31 is formed. The trunk | drum 21 is provided with the insertion part 21f by which the internal diameter was expanded from the communication part 21e in the axial direction one end side rather than the communication part 21e.
フランジ２２は、シール部材４０に対向するシール部材側端面２２ａを有する。フランジ２２は、シール部材側端面２２ａよりもシール部材４０に向けて突出し、かつ胴部２１を取り囲む環状突部２２ｂを備える。封止部材２０は、胴部２１とフランジ２２の境界部に溝２０ａを備え、この溝２０ａは胴部２１の周方向の全周に亘って延びている。また、溝２０ａは、胴部２１の外周面からフランジ２２のシール部材側端面２２ａに跨っている。溝２０ａの容積は、シール部材４０のうち胴部２１への嵌合により圧縮された部分の大きさ以上とするのが好ましい。シール部材４０は、フランジ２２への対向面としてのフランジ側端面４０ａを有し、蓋１４の外壁面１４ｂへの対向面としての蓋側端面４０ｂを有する。 The flange 22 has a seal member side end face 22 a that faces the seal member 40. The flange 22 includes an annular protrusion 22 b that protrudes toward the seal member 40 from the end surface 22 a on the seal member side and surrounds the body portion 21. The sealing member 20 includes a groove 20 a at the boundary between the body portion 21 and the flange 22, and the groove 20 a extends over the entire circumference of the body portion 21 in the circumferential direction. Further, the groove 20 a extends from the outer peripheral surface of the body portion 21 to the seal member side end surface 22 a of the flange 22. The volume of the groove 20a is preferably equal to or larger than the size of the portion of the seal member 40 that is compressed by fitting to the body portion 21. The seal member 40 has a flange-side end surface 40 a as a surface facing the flange 22, and a lid-side end surface 40 b as a surface facing the outer wall surface 14 b of the lid 14.
マンドレル３０は、棒状の操作部３２と、この操作部３２より大径の大径部３１と、操作部３２と大径部３１の境界に設けられ、操作部３２より小径の脆弱部３３とを備える。マンドレル３０はステンレス製である。そして、マンドレル３０は、大径部３１が収容部２１ｄに収容されるとともに、脆弱部３３が連通部２１ｅに収容されている。また、操作部３２は挿通部２１ｆに収容されており、その先端は胴部２１から突出している。なお、マンドレル３０の硬度は、胴部２１の硬度よりも大きい。 The mandrel 30 includes a rod-shaped operation portion 32, a large-diameter portion 31 having a larger diameter than the operation portion 32, and a fragile portion 33 having a smaller diameter than the operation portion 32 provided at the boundary between the operation portion 32 and the large-diameter portion 31. Prepare. The mandrel 30 is made of stainless steel. In the mandrel 30, the large-diameter portion 31 is accommodated in the accommodating portion 21d, and the fragile portion 33 is accommodated in the communicating portion 21e. Further, the operation part 32 is accommodated in the insertion part 21 f, and the tip thereof protrudes from the trunk part 21. In addition, the hardness of the mandrel 30 is larger than the hardness of the trunk portion 21.
そして、図４（ａ）に示すように、封止部材２０は、軸方向他端側から注液孔１４ｃに挿入され、底壁２１ａがケース１１内に位置するとともに、フランジ２２がケース１１外に位置する状態で蓋１４に締結されている。マンドレル３０の大径部３１は、胴部２１内に圧入されて胴部２１を拡径させ、かしめ部２４を形成している。なお、マンドレル３０は、脆弱部３３から操作部３２と大径部３１が分断され、操作部３２は胴部２１内から除去されている。そして、かしめ部２４の外周面は、蓋１４の内壁面１４ａにおける注液孔１４ｃの周囲に密接し、注液孔１４ｃを封止している。 As shown in FIG. 4A, the sealing member 20 is inserted into the liquid injection hole 14c from the other axial end side, the bottom wall 21a is located in the case 11, and the flange 22 is outside the case 11. It is fastened to the lid 14 in a state of being located at the position. The large-diameter portion 31 of the mandrel 30 is press-fitted into the body portion 21 to expand the diameter of the body portion 21 to form a caulking portion 24. In the mandrel 30, the operation portion 32 and the large diameter portion 31 are separated from the fragile portion 33, and the operation portion 32 is removed from the body portion 21. The outer peripheral surface of the caulking portion 24 is in close contact with the periphery of the liquid injection hole 14 c in the inner wall surface 14 a of the lid 14 and seals the liquid injection hole 14 c.
また、かしめ部２４とフランジ２２によって、封止部材２０が蓋１４に締結されるとともに、フランジ２２のシール部材側端面２２ａと、蓋１４の外壁面１４ｂとの間にはシール部材４０が挟持されている。シール部材４０には、締結に伴う軸力がシール部材側端面２２ａ及び環状突部２２ｂを介して作用し、シール部材４０の軸方向へ圧縮されている。 Further, the sealing member 20 is fastened to the lid 14 by the caulking portion 24 and the flange 22, and the seal member 40 is sandwiched between the seal member side end surface 22 a of the flange 22 and the outer wall surface 14 b of the lid 14. ing. An axial force accompanying the fastening acts on the seal member 40 via the seal member side end face 22a and the annular protrusion 22b, and is compressed in the axial direction of the seal member 40.
そして、フランジ２２の環状突部２２ｂ及びシール部材側端面２２ａは、シール部材４０のフランジ側端面４０ａに密接するとともに、シール部材側端面２２ａとフランジ側端面４０ａの間には、所定の面圧が生じている。同様に、シール部材４０の蓋側端面４０ｂは蓋１４の外壁面１４ｂに密接し、蓋側端面４０ｂと外壁面１４ｂとの間には、所定の面圧が生じている。よって、シール部材４０により、ケース１１の外側で注液孔１４ｃが封止されている。 The annular protrusion 22b of the flange 22 and the seal member side end surface 22a are in close contact with the flange side end surface 40a of the seal member 40, and a predetermined surface pressure is applied between the seal member side end surface 22a and the flange side end surface 40a. Has occurred. Similarly, the lid-side end surface 40b of the seal member 40 is in close contact with the outer wall surface 14b of the lid 14, and a predetermined surface pressure is generated between the lid-side end surface 40b and the outer wall surface 14b. Therefore, the liquid injection hole 14 c is sealed by the seal member 40 outside the case 11.
次に、二次電池１０の作用を記載する。
図４（ｂ）に示すように、封止部材２０の溝２０ａと、この溝２０ａに対向するシール部材４０の内周部との間には、逃がし空間Ｓが区画されている。ここで、胴部２１に予め嵌合されているシール部材４０は、内径が胴部２１の外径より僅かに小さいため、シール部材４０の内周部が圧縮されて厚みが増すように変形した状態である。この状態で締結に伴う軸力が作用すると、シール部材４０の内周部は、逃がし空間Ｓに逃げるように変形する。
Next, the operation of the secondary battery 10 will be described.
As shown in FIG. 4B, an escape space S is defined between the groove 20a of the sealing member 20 and the inner peripheral portion of the seal member 40 facing the groove 20a. Here, since the inner diameter of the sealing member 40 fitted in advance to the trunk portion 21 is slightly smaller than the outer diameter of the trunk portion 21, the inner peripheral portion of the sealing member 40 is deformed so as to increase in thickness. State. When an axial force accompanying fastening is applied in this state, the inner peripheral portion of the seal member 40 is deformed so as to escape into the escape space S.
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）封止部材２０に溝２０ａを形成し、注液孔１４ｃを封止部材２０で封止した状態で、シール部材４０の内周部近くに逃がし空間Ｓを区画した。このため、シール部材４０に軸力が作用したときに、シール部材４０内周部の変形を逃がし空間Ｓに逃がすことができる。その結果、シール部材４０が胴部２１に締り嵌めで嵌合された構成であっても、シール部材４０の内周部で過度に高い面圧が生じることを抑制することができる。よって、所定の軸力でかしめ部２４を形成する際に、シール部材側端面２２ａとフランジ側端面４０ａの間、及び蓋側端面４０ｂと外壁面１４ｂとの間に作用する面圧を低下させることが抑制できる。また、シール部材４０において、フランジ２２に備えられた環状突部２２ｂと対向する部位に所望する面圧を確実に生じさせ、注液孔１４ｃの周囲を的確にシールすることができる。
According to the above embodiment, the following effects can be obtained.
(1) With the groove 20 a formed in the sealing member 20 and the injection hole 14 c sealed with the sealing member 20, the escape space S was partitioned near the inner peripheral portion of the sealing member 40. For this reason, when an axial force acts on the seal member 40, the deformation of the inner peripheral portion of the seal member 40 can be released to the space S. As a result, even if the seal member 40 is configured to be fitted to the body portion 21 by an interference fit, it is possible to suppress an excessively high surface pressure from being generated in the inner peripheral portion of the seal member 40. Therefore, when forming the caulking portion 24 with a predetermined axial force, the surface pressure acting between the seal member side end surface 22a and the flange side end surface 40a and between the lid side end surface 40b and the outer wall surface 14b is reduced. Can be suppressed. Further, in the seal member 40, a desired surface pressure can be reliably generated at a portion facing the annular protrusion 22b provided in the flange 22, and the periphery of the liquid injection hole 14c can be accurately sealed.
（２）胴部２１にはシール部材４０が締り嵌めで嵌合され、一体に組み付けられている。このため、封止部材２０を扱うことで、胴部２１とシール部材４０を一体に扱うことができ、運搬が容易になる。そして、注液孔１４ｃの封止に関しても、胴部２１を注液孔１４ｃに挿入すれば、注液孔１４ｃの周囲にシール部材４０を配置できるため、注液孔１４ｃの封止作業も楽になる。 (2) The seal member 40 is fitted to the body portion 21 with an interference fit, and is integrally assembled. For this reason, the trunk | drum 21 and the sealing member 40 can be handled integrally by handling the sealing member 20, and conveyance becomes easy. As for the sealing of the liquid injection hole 14c, if the body 21 is inserted into the liquid injection hole 14c, the sealing member 40 can be disposed around the liquid injection hole 14c. Become.
なお、上記実施形態は以下のように変更してもよい。
○ 図５（ａ）及び図５（ｂ）に示すように、逃がし空間Ｓ１を、蓋１４の外壁面１４ｂで注液孔１４ｃの周囲に形成された凹部１４ｄと、胴部２１の外周面と、シール部材４０の内周部との間に区画してもよい。凹部１４ｄは、注液孔１４ｃの開口縁を拡径させて形成されるとともに、凹部１４ｄと注液孔１４ｃは連通している。そして、逃がし空間Ｓ１は、シール部材４０の内周部のうち、蓋１４の外壁面１４ｂに対向する側に設けられている。
In addition, you may change the said embodiment as follows.
○ As shown in FIG. 5A and FIG. 5B, the escape space S <b> 1 is formed with a recess 14 d formed around the liquid injection hole 14 c on the outer wall surface 14 b of the lid 14, and the outer peripheral surface of the trunk portion 21. Further, it may be partitioned between the inner peripheral portion of the seal member 40. The recess 14d is formed by expanding the opening edge of the liquid injection hole 14c, and the recess 14d and the liquid injection hole 14c communicate with each other. The escape space S <b> 1 is provided on the inner peripheral portion of the seal member 40 on the side facing the outer wall surface 14 b of the lid 14.
このように構成した場合、シール部材４０に軸力が作用したときに、シール部材４０の内周部の変形を、蓋１４側の逃がし空間Ｓ１に逃がすことができる。よって、シール部材４０の面圧が、その内周部で過度に高くなることを抑制でき、注液孔１４ｃのシール性が確保できる。 When comprised in this way, when axial force acts on the sealing member 40, the deformation | transformation of the inner peripheral part of the sealing member 40 can be escaped to the escape space S1 by the side of the lid | cover 14. As shown in FIG. Therefore, it can suppress that the surface pressure of the sealing member 40 becomes high too much in the inner peripheral part, and the sealing performance of the liquid injection hole 14c can be ensured.
○ 図６（ａ）〜図６（ｃ）に示すように、逃がし空間Ｓ２を、シール部材４０の軸方向両側の内周縁に沿って形成された面取り部４０ｄと、胴部２１の外周面と、一方の面取り部４０ｄに対向するフランジ２２又は他方の面取り部４０ｄに対向する蓋１４の外壁面１４ｂとの間に区画してもよい。 ○ As shown in FIGS. 6A to 6C, the escape space S <b> 2 includes a chamfered portion 40 d formed along inner peripheral edges on both sides in the axial direction of the seal member 40, and an outer peripheral surface of the trunk portion 21. Alternatively, it may be partitioned between the flange 22 facing one of the chamfered portions 40d or the outer wall surface 14b of the lid 14 facing the other chamfered portion 40d.
このように構成した場合、シール部材４０に軸力が作用したときに、シール部材４０の内周部の変形を、面取り部４０ｄを含む逃がし空間Ｓ２への変形とすることができる。よって、シール部材４０の面圧が、その内周部で過度に高くなることを抑制でき、注液孔１４ｃのシール性が確保できる。 When comprised in this way, when axial force acts on the sealing member 40, the deformation | transformation of the inner peripheral part of the sealing member 40 can be made into the deformation | transformation to the escape space S2 containing the chamfering part 40d. Therefore, it can suppress that the surface pressure of the sealing member 40 becomes high too much in the inner peripheral part, and the sealing performance of the liquid injection hole 14c can be ensured.
なお、シール部材４０の面取り部４０ｄは、シール部材４０の軸方向の両内周縁のうちいずれか一方のみに設けられ、逃がし空間Ｓ２は、シール部材４０の軸方向の片側のみに設けられていてもよい。 The chamfered portion 40d of the seal member 40 is provided on only one of the inner peripheral edges in the axial direction of the seal member 40, and the escape space S2 is provided only on one side of the seal member 40 in the axial direction. Also good.
○ 実施形態の封止部材２０において、溝２０ａを含む逃がし空間Ｓに加え、図５に示すような蓋１４の凹部１４ｄを含む逃がし空間Ｓ１を設けてもよい。さらに、図６に示すようなシール部材４０の面取り部４０ｄを含む逃がし空間Ｓ２も設けてもよい。すなわち、二次電池１０では、封止部材２０の溝２０ａを含む逃がし空間Ｓ、蓋１４の凹部１４ｄを含む逃がし空間Ｓ１、及びシール部材４０の面取り部４０ｄを含む逃がし空間Ｓ２の少なくとも一つを備えていてもよいし、複数の逃がし空間Ｓ，Ｓ１，Ｓ２を備えていてもよい。 In the sealing member 20 of the embodiment, in addition to the escape space S including the groove 20a, an escape space S1 including the concave portion 14d of the lid 14 as illustrated in FIG. 5 may be provided. Furthermore, an escape space S2 including a chamfered portion 40d of the seal member 40 as shown in FIG. 6 may be provided. That is, in the secondary battery 10, at least one of the escape space S including the groove 20a of the sealing member 20, the escape space S1 including the concave portion 14d of the lid 14, and the escape space S2 including the chamfered portion 40d of the seal member 40 is provided. It may be provided, or a plurality of escape spaces S, S1, S2 may be provided.
○ 図７に示すように、シール部材５０は、円環状の基部５１を備え、基部５１はフランジ２２への対向面としてのフランジ側端面５１ａを有するとともに、蓋１４の外壁面１４ｂへの対向面としての蓋側端面５１ｂを有する。 As shown in FIG. 7, the seal member 50 includes an annular base 51, the base 51 has a flange-side end face 51 a as a face facing the flange 22, and a face facing the outer wall surface 14 b of the lid 14. As a lid side end face 51b.
シール部材５０は、基部５１の内周面から基部５１の中心軸Ｌに向けて突出する突片５２を複数備える。複数の突片５２は、基部５１の周方向に沿って等間隔おきに配置されている。突片５２の厚みと基部５１の厚みは同じである。基部５１の内周面から中心軸Ｌに向かって突片５２が延びる方向を突片５２の突出方向とすると、全ての突片５２の突出方向の先端を結んだ仮想円Ｃの直径は、胴部２１の外径より僅かに小さい。 The seal member 50 includes a plurality of projecting pieces 52 that project from the inner peripheral surface of the base 51 toward the central axis L of the base 51. The plurality of protruding pieces 52 are arranged at equal intervals along the circumferential direction of the base 51. The thickness of the projecting piece 52 and the thickness of the base 51 are the same. When the direction in which the protruding pieces 52 extend from the inner peripheral surface of the base portion 51 toward the central axis L is the protruding direction of the protruding pieces 52, the diameter of the virtual circle C connecting the tips in the protruding direction of all the protruding pieces 52 is It is slightly smaller than the outer diameter of the portion 21.
そして、図８に示すように、シール部材５０は、突片５２の内側に胴部２１が挿入され、全ての突片５２の突出方向の先端が胴部２１の外周面に締り嵌めによって嵌合し、シール部材５０が胴部２１の外周面に嵌合され、一体化されている。 As shown in FIG. 8, the seal member 50 has the body portion 21 inserted inside the projecting piece 52, and the tips in the projecting direction of all the projecting pieces 52 are fitted into the outer peripheral surface of the body portion 21 by an interference fit. The seal member 50 is fitted and integrated with the outer peripheral surface of the body portion 21.
図９（ａ）の右半分及び図９（ｃ）に示すように、シール部材５０が胴部２１に一体化された封止部材２０では、周方向に隣り合う突片５２の側面部５２ａ同士の間と、胴部２１の外周面と、突片５２を除いた基部５１の内周面との間には、逃がし空間Ｓ３が区画されている。逃がし空間Ｓ３は、胴部２１の周方向に沿って等間隔おきに区画されている。 As shown in the right half of FIG. 9A and FIG. 9C, in the sealing member 20 in which the seal member 50 is integrated with the body portion 21, the side surface portions 52a of the projecting pieces 52 adjacent to each other in the circumferential direction. An escape space S3 is defined between the outer peripheral surface of the body portion 21 and the inner peripheral surface of the base portion 51 excluding the projecting piece 52. The escape space S <b> 3 is partitioned at equal intervals along the circumferential direction of the trunk portion 21.
そして、図９（ｂ）に示すように、封止部材２０で注液孔１４ｃを封止し、シール部材５０の基部５１に軸力が作用したときに、基部５１の内周面が中心軸Ｌに向かって膨らむように変形し、その変形を逃がし空間Ｓ３に逃がすことができる。 Then, as shown in FIG. 9B, when the injection hole 14 c is sealed with the sealing member 20 and an axial force acts on the base 51 of the seal member 50, the inner peripheral surface of the base 51 is the central axis. It can be deformed so as to swell toward L, and the deformation can be released to the space S3.
また、図９（ｃ）に示すように、シール部材５０の突片５２に軸力が作用したときに、突出方向に延びる突片５２の側面部５２ａが膨らむように変形し、側面部５２ａの変形を逃がし空間Ｓ３に逃がすことができる。よって、シール部材５０の面圧が、基部５１の突片５２の先端側（シール部材５０の内周部）だけで過度に高くなることを抑制でき、注液孔１４ｃのシール性が確保できる。 Further, as shown in FIG. 9C, when an axial force is applied to the projecting piece 52 of the seal member 50, the side surface portion 52a of the projecting piece 52 extending in the projecting direction is deformed so as to swell, and the side surface portion 52a The deformation can be escaped to the space S3. Therefore, it is possible to suppress the surface pressure of the seal member 50 from becoming excessively high only at the distal end side (inner peripheral portion of the seal member 50) of the projecting piece 52 of the base 51, and the sealing performance of the liquid injection hole 14c can be ensured.
なお、図７に示す形態において、封止部材２０の溝２０ａを含む逃がし空間Ｓを設けてもよいし、図５に示すような蓋１４の凹部１４ｄを含む逃がし空間Ｓ１を設けてもよい。さらに、図６に示すような面取り部４０ｄを含む逃がし空間Ｓ２も設けてもよい。すなわち、シール部材５０を備える封止部材２０において、溝２０ａを含む逃がし空間Ｓ、蓋１４の凹部１４ｄを含む逃がし空間Ｓ１、及び面取り部４０ｄを含む逃がし空間Ｓ２の少なくとも一つを備えていてもよいし、複数の逃がし空間Ｓ，Ｓ１，Ｓ２を備えていてもよい。 In the form shown in FIG. 7, the escape space S including the groove 20a of the sealing member 20 may be provided, or the escape space S1 including the concave portion 14d of the lid 14 as shown in FIG. 5 may be provided. Further, an escape space S2 including a chamfered portion 40d as shown in FIG. 6 may be provided. That is, the sealing member 20 including the sealing member 50 may include at least one of the escape space S including the groove 20a, the escape space S1 including the concave portion 14d of the lid 14, and the escape space S2 including the chamfered portion 40d. Alternatively, a plurality of escape spaces S, S1, and S2 may be provided.
○ シール部材４０，５０を軸方向へ圧縮するため、フランジ２２に環状突部２２ｂを設けたが、環状突部２２ｂを削除し、蓋１４の外壁面１４ｂにシール部材４０，５０に向けて突出する突部を設けてもよい。又は、環状突部２２ｂと蓋１４の突部の両方を設けてもよい。 ○ In order to compress the seal members 40 and 50 in the axial direction, the annular protrusion 22b is provided on the flange 22, but the annular protrusion 22b is deleted and protrudes toward the seal member 40 and 50 on the outer wall surface 14b of the lid 14. Protruding parts may be provided. Alternatively, both the annular protrusion 22b and the protrusion of the lid 14 may be provided.
○ 実施形態では、蓋１４を壁部としたが、本体部材１３の側壁や底壁を壁部とし、それらに注液孔１４ｃを設け、封止部材２０で封止してもよい。
○ 正極電極は、正極金属箔の両面に正極活物質を有するとしたが、正極金属箔の片面のみに正極活物質を有していてもよい。同様に、負極電極は、負極金属箔の両面に負極活物質を有するとしたが、負極金属箔の片面のみに負極活物質を有していてもよい。
In the embodiment, the lid 14 is a wall portion, but the side wall or bottom wall of the main body member 13 may be a wall portion, and a liquid injection hole 14 c may be provided in the wall portion and sealed with the sealing member 20.
Although the positive electrode has the positive electrode active material on both sides of the positive electrode metal foil, the positive electrode may have the positive electrode active material only on one side of the positive electrode metal foil. Similarly, although the negative electrode has the negative electrode active material on both sides of the negative electrode metal foil, it may have the negative electrode active material only on one side of the negative electrode metal foil.
○ 蓄電装置は、二次電池１０でなく、電気二重層キャパシタ等の他の蓄電装置に適用してもよい。
○ 実施形態では、電極組立体１２として積層タイプを記載したが、捲回タイプでもよい。
The power storage device may be applied not to the secondary battery 10 but to another power storage device such as an electric double layer capacitor.
In the embodiment, the stacked type is described as the electrode assembly 12, but a wound type may be used.
○ 二次電池１０は、リチウムイオン二次電池であったが、これに限らず、他の二次電池であってもよい。要するに、正極活物質と負極活物質との間をイオンが移動するとともに電荷の授受を行うものであればよい。 The secondary battery 10 is a lithium ion secondary battery, but is not limited thereto, and may be another secondary battery. In short, any material may be used as long as ions move between the positive electrode active material and the negative electrode active material and transfer charge.
Ｓ，Ｓ１，Ｓ２，Ｓ３…逃がし空間、１０…蓄電装置としての二次電池、１１…ケース、１２…電極組立体、１４…壁部としての蓋、１４ｂ…外壁面、１４ｃ…注液孔、１４ｄ…凹部、１８…電解液、２０…封止部材、２０ａ…溝、２１…胴部、２２…フランジ、２４…かしめ部、４０，５０…シール部材、４０ｄ…面取り部、５１…基部、５２…突片。 S, S1, S2, S3 ... Relief space, 10 ... Secondary battery as power storage device, 11 ... Case, 12 ... Electrode assembly, 14 ... Lid as wall, 14b ... Outer wall surface, 14c ... Injection hole, 14d ... recess, 18 ... electrolyte, 20 ... sealing member, 20a ... groove, 21 ... trunk, 22 ... flange, 24 ... caulking part, 40, 50 ... sealing member, 40d ... chamfered part, 51 ... base part, 52 ... projection.
Claims (5)
前記ケースの壁部に前記電解液の注液孔を有するとともに、前記注液孔の封止部材を備え、
前記封止部材は、
有底筒状の胴部と、
前記胴部の軸方向一端のフランジと、
前記胴部への締り嵌めによって一体に組み付けられた環状のシール部材と、を備え、
前記封止部材は、前記胴部が軸方向他端から前記注液孔に挿通されるとともに、前記ケース内に位置する部分に、前記胴部を内側から拡径させたかしめ部を有し、
前記かしめ部と前記フランジとで前記壁部に締結されるとともに、前記フランジと前記壁部との間に前記シール部材が挟持されており、
挟持に伴う前記シール部材の内周部の変形を逃がすための逃がし空間を有し、
前記逃がし空間は、前記胴部とフランジとの境界部に凹設された溝と、前記シール部材の内周部との間に区画されていることを特徴とする蓄電装置。 The electrode assembly and the electrolyte are accommodated in the case,
While having a liquid injection hole in the wall of the case, a sealing member for the liquid injection hole,
The sealing member is
A cylindrical body with a bottom;
A flange at one axial end of the barrel,
An annular seal member assembled integrally by an interference fit to the body,
The sealing member has a caulking portion in which the body portion is inserted from the other end in the axial direction into the liquid injection hole, and a portion located in the case has a diameter that expands the body portion from the inside.
The caulking portion and the flange are fastened to the wall portion, and the seal member is sandwiched between the flange and the wall portion,
Have a relief space for releasing the deformation of the inner peripheral portion of the sealing member with the clamping,
The power storage device , wherein the escape space is partitioned between a groove recessed at a boundary portion between the body portion and the flange and an inner peripheral portion of the seal member .
前記ケースの壁部に前記電解液の注液孔を有するとともに、前記注液孔の封止部材を備え、
前記封止部材は、
有底筒状の胴部と、
前記胴部の軸方向一端のフランジと、
前記胴部への締り嵌めによって一体に組み付けられた環状のシール部材と、を備え、
前記封止部材は、前記胴部が軸方向他端から前記注液孔に挿通されるとともに、前記ケース内に位置する部分に、前記胴部を内側から拡径させたかしめ部を有し、
前記かしめ部と前記フランジとで前記壁部に締結されるとともに、前記フランジと前記壁部との間に前記シール部材が挟持されており、
挟持に伴う前記シール部材の内周部の変形を逃がすための逃がし空間を有し、
前記逃がし空間は、前記シール部材の内周縁に沿って形成された面取り部と、前記胴部の外周面と、前記面取り部の対向するフランジ又は前記壁部の外壁面との間に区画されている蓄電装置。 The electrode assembly and the electrolyte are accommodated in the case,
While having a liquid injection hole in the wall of the case, a sealing member for the liquid injection hole,
The sealing member is
A cylindrical body with a bottom;
A flange at one axial end of the barrel,
An annular seal member assembled integrally by an interference fit to the body,
The sealing member has a caulking portion in which the body portion is inserted from the other end in the axial direction into the liquid injection hole, and a portion located in the case has a diameter that expands the body portion from the inside.
The caulking portion and the flange are fastened to the wall portion, and the seal member is sandwiched between the flange and the wall portion,
Having an escape space for escaping deformation of the inner peripheral portion of the seal member accompanying clamping,
The relief space is defined between a chamfered portion formed along an inner peripheral edge of the seal member, an outer peripheral surface of the body portion, and a flange facing the chamfered portion or an outer wall surface of the wall portion. that a charge reservoir.
前記ケースの壁部に前記電解液の注液孔を有するとともに、前記注液孔の封止部材を備え、
前記封止部材は、
有底筒状の胴部と、
前記胴部の軸方向一端のフランジと、
前記胴部への締り嵌めによって一体に組み付けられた環状のシール部材と、を備え、
前記封止部材は、前記胴部が軸方向他端から前記注液孔に挿通されるとともに、前記ケース内に位置する部分に、前記胴部を内側から拡径させたかしめ部を有し、
前記かしめ部と前記フランジとで前記壁部に締結されるとともに、前記フランジと前記壁部との間に前記シール部材が挟持されており、
挟持に伴う前記シール部材の内周部の変形を逃がすための逃がし空間を有し、
前記シール部材は、前記胴部が挿入された環状の基部を備えるとともに、該基部の内周面から突出し、かつ前記基部からの突出方向の先端が前記胴部の外周面に締り嵌めする突片を複数備え、前記突片は前記基部の周方向に間隔を空けて設けられており、前記逃がし空間は、周方向に隣り合う突片同士の間と、前記胴部の外周面と、前記基部の内周面との間に区画されている蓄電装置。 The electrode assembly and the electrolyte are accommodated in the case,
While having a liquid injection hole in the wall of the case, a sealing member for the liquid injection hole,
The sealing member is
A cylindrical body with a bottom;
A flange at one axial end of the barrel,
An annular seal member assembled integrally by an interference fit to the body,
The sealing member has a caulking portion in which the body portion is inserted from the other end in the axial direction into the liquid injection hole, and a portion located in the case has a diameter that expands the body portion from the inside.
The caulking portion and the flange are fastened to the wall portion, and the seal member is sandwiched between the flange and the wall portion,
Having an escape space for escaping deformation of the inner peripheral portion of the seal member accompanying clamping,
The seal member includes an annular base portion into which the body portion is inserted, a protruding piece that protrudes from the inner peripheral surface of the base portion, and a tip in a protruding direction from the base portion is tightly fitted to the outer peripheral surface of the body portion. The projecting pieces are provided at intervals in the circumferential direction of the base portion, and the escape space is formed between the projecting pieces adjacent in the circumferential direction, the outer peripheral surface of the trunk portion, and the base portion. a charge reservoir that is defined between the inner circumferential surface of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014003527A JP6197656B2 (en) | 2013-10-03 | 2014-01-10 | Power storage device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013208490 | 2013-10-03 | ||
| JP2013208490 | 2013-10-03 | ||
| JP2014003527A JP6197656B2 (en) | 2013-10-03 | 2014-01-10 | Power storage device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2015210950A (en) * | 2014-04-25 | 2015-11-24 | 株式会社豊田自動織機 | Power storage device |
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| CN116799386B (en) * | 2023-08-16 | 2023-12-26 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
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| JPH02304230A (en) * | 1989-05-19 | 1990-12-18 | Bridgestone Corp | Vibration isolator |
| JP4110632B2 (en) * | 1998-09-30 | 2008-07-02 | 松下電器産業株式会社 | Sealed battery |
| US6673489B2 (en) * | 2001-12-28 | 2004-01-06 | Quallion Llc | Electric battery assembly and method of manufacture |
| JP5425526B2 (en) * | 2009-05-29 | 2014-02-26 | 三洋電機株式会社 | Sealed battery |
| JP5533617B2 (en) * | 2010-12-13 | 2014-06-25 | トヨタ自動車株式会社 | Sealed batteries and vehicles and equipment |
| JP2013089322A (en) * | 2011-10-13 | 2013-05-13 | Toyota Motor Corp | Sealed battery and method of manufacturing the same |
| JP5821510B2 (en) * | 2011-10-14 | 2015-11-24 | トヨタ自動車株式会社 | Sealed battery and method for manufacturing the same |
| JP5447492B2 (en) * | 2011-11-25 | 2014-03-19 | トヨタ自動車株式会社 | Sealed battery |
| JP5849748B2 (en) * | 2012-02-07 | 2016-02-03 | トヨタ自動車株式会社 | Sealed battery and sealing member for sealed battery |
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