JP6090579B2 - Power storage device - Google Patents
Power storage device Download PDFInfo
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- JP6090579B2 JP6090579B2 JP2013190791A JP2013190791A JP6090579B2 JP 6090579 B2 JP6090579 B2 JP 6090579B2 JP 2013190791 A JP2013190791 A JP 2013190791A JP 2013190791 A JP2013190791 A JP 2013190791A JP 6090579 B2 JP6090579 B2 JP 6090579B2
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- liquid injection
- injection hole
- sealing
- case
- hole
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- 238000007789 sealing Methods 0.000 claims description 125
- 238000002347 injection Methods 0.000 claims description 93
- 239000007924 injection Substances 0.000 claims description 93
- 239000007788 liquid Substances 0.000 claims description 80
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 17
- 239000008151 electrolyte solution Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000011888 foil Substances 0.000 description 7
- 238000007872 degassing Methods 0.000 description 5
- 239000011255 nonaqueous electrolyte Substances 0.000 description 5
- 239000011149 active material Substances 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 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
- 230000032683 aging Effects 0.000 description 1
- 239000011889 copper foil Substances 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
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
- Electric Double-Layer Capacitors Or The Like (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Filling, Topping-Up Batteries (AREA)
Description
本発明は、ケースの壁部に電解液の注液孔を有するとともに、注液孔の封止部材を備える蓄電装置に関する。 The present invention relates to a power storage device having an electrolyte injection hole in a case wall and a sealing member for the injection hole.
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 case lid member 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、例えば特許文献１が挙げられる。図８に示すように、リチウムイオン電池８０は、電池缶（図示せず）と電池蓋８１で構成される電池容器を備える。電池容器の内部には電極群及び非水電解液が収容されている。電池蓋８１は、非水電解液の注液口８２を備えるとともに、注液口８２を密閉する安全弁８３を備える。安全弁８３は、弁体８５とスリーブ８６とで構成されている。 Patent document 1 is mentioned as a sealing structure of a liquid injection hole, for example. As shown in FIG. 8, the lithium ion battery 80 includes a battery container including a battery can (not shown) and a battery lid 81. An electrode group and a non-aqueous electrolyte are accommodated inside the battery container. The battery lid 81 includes a non-aqueous electrolyte injection port 82 and a safety valve 83 that seals the injection port 82. The safety valve 83 includes a valve body 85 and a sleeve 86.
注液口８２を封止する前の弁体８５は、筒状部材８７と芯金８８を有している。筒状部材８７は鍔部８７ａを有する金属製の有底円筒状である。芯金８８は、一側端部（先端部）に拡径された大径部８８ａを有し、その近傍に脆弱部８８ｂを有する。 The valve body 85 before sealing the liquid injection port 82 has a cylindrical member 87 and a cored bar 88. The cylindrical member 87 is a metal bottomed cylindrical shape having a flange portion 87a. The cored bar 88 has a large-diameter portion 88a whose diameter is enlarged at one end portion (tip portion), and has a fragile portion 88b in the vicinity thereof.
そして、安全弁８３によって注液口８２を封止するには、まず、注液口８２から非水電解液を電池容器に注入した後、注液口８２にスリーブ８６と弁体８５を挿入する。次に、筒状部材８７の鍔部８７ａを治具（図示せず）により電池蓋８１側に押圧する。この状態で芯金８８の他側端部（露出した部分）をグリッパ（図示せず）で挟んで引き抜くと、芯金８８より硬度の小さい筒状部材８７は、芯金８８の大径部８８ａが上方に移動するのに合わせて内径及び外径が拡径される。 In order to seal the liquid injection port 82 with the safety valve 83, first, a nonaqueous electrolyte is injected into the battery container from the liquid injection port 82, and then the sleeve 86 and the valve body 85 are inserted into the liquid injection port 82. Next, the flange 87a of the cylindrical member 87 is pressed toward the battery lid 81 side by a jig (not shown). In this state, when the other end portion (exposed portion) of the cored bar 88 is sandwiched and pulled out by a gripper (not shown), the cylindrical member 87 having a hardness lower than that of the cored bar 88 becomes the large-diameter portion 88a of the cored bar 88. The inner diameter and the outer diameter are expanded as the valve moves upward.
このとき、スリーブ８６の円筒部８６ａが圧縮されて筒状部材８７と電池蓋８１とが密着し、安全弁８３が形成されるとともに、安全弁８３によって注液口８２が封止される。 At this time, the cylindrical portion 86 a of the sleeve 86 is compressed, the tubular member 87 and the battery lid 81 are brought into close contact with each other, a safety valve 83 is formed, and the liquid injection port 82 is sealed by the safety valve 83.
ところで、非水電解液が電池容器に注入されると、非水電解液と電極群の活物質との反応によってガスが発生する場合がある。電池容器ではガスによって内圧が上昇し、電池容器が膨張してしまう虞があるため、電池容器からガスを抜く必要があるが、特許文献１においては、安全弁８３を注液口８２から抜き取ることができず、ガス抜きができない。 By the way, when the non-aqueous electrolyte is injected into the battery container, gas may be generated due to the reaction between the non-aqueous electrolyte and the active material of the electrode group. In the battery container, the internal pressure rises due to the gas and the battery container may expand. Therefore, it is necessary to remove the gas from the battery container. However, in Patent Document 1, the safety valve 83 can be removed from the liquid injection port 82. I can't vent the gas.
本発明は、注液孔からのガス抜きを可能にしつつ、ガス抜き後は注液孔を封止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 after degassing while allowing the gas injection from the liquid injection hole.
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る蓄電装置であって、前記封止部材は、前記注液孔に挿入され、内側に軸孔を有する筒状であり、かつ弾性変形可能なシール部材と、前記軸孔に挿入された軸部、及び前記軸部の端部のうちケース内側の端部に設けられ、かつ前記軸孔の直径よりも大径の大径部を備えるマンドレルと、を有し、前記マンドレルを前記シール部材から引き抜く方向へ移動させることで、前記シール部材の前記ケース内に位置する部分が、前記大径部によって軸方向へ押し潰されるとともに内側から拡径されることにより、前記注液孔を封止可能にし、前記シール部材で前記注液孔を封止した状態を維持する維持構造を備え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 is a cylindrical member that is inserted into the liquid injection hole and has a shaft hole inside, and is elastically deformable, and a shaft that is inserted into the shaft hole. And a mandrel that is provided at an end portion inside the case among the end portions of the shaft portion and has a large-diameter portion that is larger in diameter than the diameter of the shaft hole, and the mandrel from the seal member By moving in the pulling direction, the portion of the seal member located in the case is crushed in the axial direction by the large diameter portion and expanded from the inside, thereby sealing the liquid injection hole. to, the injection hole in the sealing member And summarized in that comprises a maintenance structure for maintaining the sealed state.
これによれば、注液孔からケース内へ電解液を注入した後、シール部材を注液孔内に挿入した状態でマンドレルをシール部材から引き抜く方向へ移動させると、大径部によってシール部材が軸方向及び拡径方向へ弾性変形する。すると、シール部材の外周面が注液孔の内周面、及び壁部の内壁面における注液孔の周囲に密接するとともに、大径部がシール部材の内周面に密接し、注液孔を封止することができる。そして、電解液が電極組立体の備える活物質と反応し、ガスが発生した場合には、封止部材により注液孔からガスがケース外へ漏れることが抑制される。その後、マンドレルをシール部材に入れ込む方向へ移動させ、シール部材を軸方向及び拡径方向へ弾性変形させる前の状態に変形させると、シール部材による注液孔の封止が解除され、ガスを注液孔からケース外へ放出させることができる。その後、再び、マンドレルを操作してシール部材を弾性変形させ、封止部材によって注液孔を封止する。よって、封止部材により、注液孔からのガス抜きを可能にしつつ、ガス抜き後は注液孔を封止することができる。 According to this, after injecting the electrolyte from the liquid injection hole into the case, the seal member is moved by the large diameter portion when the mandrel is moved away from the seal member in a state where the seal member is inserted into the liquid injection hole. It is elastically deformed in the axial direction and the diameter expanding direction. Then, the outer peripheral surface of the seal member is in close contact with the inner peripheral surface of the liquid injection hole and the periphery of the liquid injection hole in the inner wall surface of the wall portion, and the large diameter portion is in close contact with the inner peripheral surface of the seal member. Can be sealed. And when electrolyte solution reacts with the active material with which an electrode assembly is provided, and gas generate | occur | produces, it is suppressed by a sealing member that gas leaks out of a case from a liquid injection hole. After that, when the mandrel is moved in the direction to be inserted into the seal member and the seal member is deformed to the state before being elastically deformed in the axial direction and the diameter expanding direction, the sealing of the liquid injection hole by the seal member is released, and the gas is discharged. It can be discharged out of the case through the injection hole. Thereafter, the mandrel is operated again to elastically deform the sealing member, and the liquid injection hole is sealed by the sealing member. Therefore, the liquid injection hole can be sealed after degassing while allowing the gas to be released from the liquid injection hole by the sealing member.
また、これによれば、維持構造により、マンドレルが、シール部材から引き抜かれる方向と逆方向、すなわち、注液孔の封止を解除する方向へ移動することを防止することができる。 Further, according to this, by the maintenance structure, mandrel, the direction drawn out from the sealing member and the opposite direction, i.e., it can be prevented from being moved in the direction to release the sealing of the injection hole.
また、蓄電装置について、前記シール部材は、前記注液孔の周囲で前記壁部の外壁面に係止するフランジを有するとともに、前記封止部材は、前記壁部と共に前記フランジを挟持し、かつ前記軸部が挿通される挿通孔を有する封止蓋を備え、前記マンドレルは、前記軸部の端部のうちケース外側の端部に設けられた操作部を有しており、前記維持構造は、前記操作部と、前記封止蓋に形成され、前記操作部が係止可能な係止部とを備えていてもよい。 In the power storage device, the seal member has a flange that is engaged with the outer wall surface of the wall portion around the liquid injection hole, and the sealing member sandwiches the flange together with the wall portion, and A sealing lid having an insertion hole through which the shaft portion is inserted, the mandrel has an operation portion provided at an end portion outside the case among the end portions of the shaft portion, and the maintenance structure is The operation portion and a locking portion formed on the sealing lid and capable of locking the operation portion may be provided.
これによれば、マンドレルを前記シール部材から引き抜く方向へ移動させた後、操作部を係止部に係止させるだけで、ワンタッチで注液孔を封止した状態を維持することができる。 According to this, after the mandrel is moved in the direction in which the mandrel is pulled out from the seal member, the liquid injection hole can be maintained in a one-touch state only by locking the operating portion with the locking portion.
また、蓄電装置について、前記シール部材は、ケース内側で前記軸孔に連通し、かつ前記軸孔より大径なガイド孔を有するのが好ましい。
これによれば、マンドレルをシール部材から引き抜く方向へ移動させたとき、ガイド孔により大径部をシール部材の内側に入り込みやすくすることができる。
In the power storage device, it is preferable that the seal member has a guide hole that communicates with the shaft hole inside the case and has a larger diameter than the shaft hole.
According to this, when the mandrel is moved in the direction in which the mandrel is pulled out from the seal member, the large diameter portion can easily enter the inside of the seal member by the guide hole.
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、注液孔からのガス抜きを可能にしつつ、ガス抜き後は注液孔を封止することができる。 According to the present invention, it is possible to seal the liquid injection hole after degassing while allowing the gas injection from the liquid injection hole.
以下、蓄電装置に具体化した一実施形態を図１〜図５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内に電極組立体１２及び電解液１８を備える。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は角型電池である。また、二次電池１０は、リチウムイオン電池である。
Hereinafter, an embodiment embodied in a power storage device will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the secondary battery 10 includes an electrode assembly 12 and an electrolytic solution 18 in a case 11. The case 11 includes a bottomed square 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 square battery. The secondary battery 10 is a lithium ion battery.
図１に示すように、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１７ａ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。 As shown in FIG. 1, a positive electrode terminal 15 and a negative electrode terminal 16 are electrically connected to the electrode assembly 12. Ring-shaped insulating members 17 a 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.
図２に示すように、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の漏れが抑制されている。 As shown in FIG. 2, 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 electrolytic solution 18 from the inside of the case 11 is suppressed.
封止部材２０は、中空円筒状のシール部材２１と、シール部材２１の軸方向一端に設けられた環状のフランジ２３と、フランジ２３に載置される円板状の封止蓋３０と、シール部材２１の内側に挿入された棒状のマンドレル４０と、を有する。封止部材２０は、シール部材２１の軸方向他端側がケース１１内に位置するとともに、フランジ２３及び封止蓋３０がケース１１外に位置する状態で蓋１４に組み付けられている。 The sealing member 20 includes a hollow cylindrical sealing member 21, an annular flange 23 provided at one axial end of the sealing member 21, a disk-shaped sealing lid 30 placed on the flange 23, a seal And a rod-shaped mandrel 40 inserted inside the member 21. The sealing member 20 is assembled to the lid 14 with the other end in the axial direction of the sealing member 21 positioned in the case 11 and the flange 23 and the sealing lid 30 positioned outside the case 11.
まず、注液孔１４ｃを封止する前の封止部材２０について説明する。
図３、図４及び図５に示すように、シール部材２１とフランジ２３は共にゴム製で一体化されている。シール部材２１の外径は、注液孔１４ｃの直径より若干小さい。また、シール部材２１の軸方向への長さは、注液孔１４ｃの軸方向への長さより長い。フランジ２３の外径は、注液孔１４ｃの直径より長い。シール部材２１の軸方向一端にフランジ２３が設けられ、フランジ２３は注液孔１４ｃの周囲で蓋１４の外壁面１４ｂに係止する。また、シール部材２１の軸方向他端には、蓋１４の内壁面１４ａよりもケース１１内に突出するシール用端部２１ａが設けられている。シール部材２１は、内側に軸孔２１ｂを有するとともに、軸方向他端側で、かつシール用端部２１ａの内側に、軸孔２１ｂの直径よりも大径のガイド孔２１ｃを有する。
First, the sealing member 20 before sealing the liquid injection hole 14c will be described.
As shown in FIGS. 3, 4, and 5, the seal member 21 and the flange 23 are both made of rubber and integrated. The outer diameter of the seal member 21 is slightly smaller than the diameter of the liquid injection hole 14c. Further, the length of the seal member 21 in the axial direction is longer than the length of the liquid injection hole 14c in the axial direction. The outer diameter of the flange 23 is longer than the diameter of the liquid injection hole 14c. A flange 23 is provided at one axial end of the seal member 21, and the flange 23 is engaged with the outer wall surface 14 b of the lid 14 around the liquid injection hole 14 c. In addition, a seal end 21 a that protrudes into the case 11 from the inner wall surface 14 a of the lid 14 is provided at the other axial end of the seal member 21. The seal member 21 has a shaft hole 21b on the inner side, and a guide hole 21c having a diameter larger than the diameter of the shaft hole 21b on the other end side in the axial direction and on the inner side of the seal end 21a.
封止蓋３０は、中央に挿通孔３０ａを有する円板状であり、封止蓋３０の外径は、フランジ２３の外径と同じである。封止蓋３０は、フランジ２３に接触する平坦面状のフランジ側接触面３０ｂを有する。また、封止蓋３０は、封止蓋３０を挟んだフランジ側接触面３０ｂと反対側の面に、挿通孔３０ａを挟むように係止部３２を備え、係止部３２は、封止蓋３０の直径の延びる方向に沿って凹んでいる。係止部３２の内底面は、平坦面である。さらに、封止蓋３０は、封止蓋３０を挟んだフランジ側接触面３０ｂと反対側の面に、挿通孔３０ａを挟むように待機用係止部３３を備える。この待機用係止部３３は、係止部３２に直交して延びる状態に凹むとともに、係止部３２よりも深く凹んでいる。待機用係止部３３の内底面は、平坦面である。 The sealing lid 30 has a disk shape having an insertion hole 30 a in the center, and the outer diameter of the sealing lid 30 is the same as the outer diameter of the flange 23. The sealing lid 30 has a flat flange-like contact surface 30 b that contacts the flange 23. Further, the sealing lid 30 includes a locking portion 32 on the surface opposite to the flange-side contact surface 30b with the sealing lid 30 interposed therebetween so as to sandwich the insertion hole 30a. It is recessed along the direction in which the diameter of 30 extends. The inner bottom surface of the locking part 32 is a flat surface. Further, the sealing lid 30 includes a standby locking portion 33 on the surface opposite to the flange-side contact surface 30b sandwiching the sealing lid 30 so as to sandwich the insertion hole 30a. The standby locking portion 33 is recessed in a state extending perpendicular to the locking portion 32 and is deeper than the locking portion 32. The inner bottom surface of the standby locking portion 33 is a flat surface.
マンドレル４０は、ステンレス製であり、棒状の軸部４２を備える。また、マンドレル４０は、軸部４２の軸方向両端部のうち、ケース１１内側の端部に大径部４１を有し、この大径部４１は軸部４２よりも大径の円錐柱状である。さらに、マンドレル４０は、軸部４２の軸方向両端部のうち、ケース１１外側の端部に操作部４３とを有する。操作部４３は矩形状で、長手方向への長さが封止蓋３０の直径よりも短くなっている。なお、封止蓋３０の挿通孔３０ａは、大径部４１が通過可能な大きさである。 The mandrel 40 is made of stainless steel and includes a rod-shaped shaft portion 42. The mandrel 40 has a large-diameter portion 41 at the inner end of the case 11 among both axial end portions of the shaft portion 42, and the large-diameter portion 41 has a conical column shape larger in diameter than the shaft portion 42. . Further, the mandrel 40 has an operation portion 43 at an end portion outside the case 11 among both axial end portions of the shaft portion 42. The operation unit 43 has a rectangular shape, and the length in the longitudinal direction is shorter than the diameter of the sealing lid 30. The insertion hole 30a of the sealing lid 30 has a size that allows the large diameter portion 41 to pass therethrough.
そして、マンドレル４０は、大径部４１が封止蓋３０の挿通孔３０ａ及びシール部材２１の軸孔２１ｂを貫通しているとともに、軸部４２がシール部材２１の軸孔２１ｂに挿通されている。また、マンドレル４０の操作部４３は、封止蓋３０の待機用係止部３３に係止され、操作部４３の待機状態では、大径部４１は、シール用端部２１ａを軸方向及び拡径方向に弾性変形させていない。 In the mandrel 40, the large diameter portion 41 passes through the insertion hole 30 a of the sealing lid 30 and the shaft hole 21 b of the seal member 21, and the shaft portion 42 is inserted into the shaft hole 21 b of the seal member 21. . Further, the operation portion 43 of the mandrel 40 is locked to the standby locking portion 33 of the sealing lid 30, and in the standby state of the operation portion 43, the large-diameter portion 41 extends the sealing end 21 a in the axial direction and the enlarged direction. It is not elastically deformed in the radial direction.
そして、図２に示すように、封止部材２０によって注液孔１４ｃが封止された状態では、シール部材２１の外周面と、注液孔１４ｃの内周面とは互いに密接している。マンドレル４０の大径部４１は、シール用端部２１ａの内側、すなわちガイド孔２１ｃに圧入され、シール用端部２１ａは軸方向に押し潰される状態に弾性変形しているとともに、内側から拡径する状態に弾性変形している。よって、拡径したシール用端部２１ａの外周面と、内壁面１４ａにおける注液孔１４ｃの周囲とは互いに密接して面圧が立っているとともに、シール用端部２１ａの内周面と、マンドレル４０の大径部４１の周面とが密接して面圧が立っている。したがって、各密接により、シール部材２１によって注液孔１４ｃは封止されている。 As shown in FIG. 2, in a state where the liquid injection hole 14 c is sealed by the sealing member 20, the outer peripheral surface of the seal member 21 and the inner peripheral surface of the liquid injection hole 14 c are in close contact with each other. The large-diameter portion 41 of the mandrel 40 is press-fitted into the inside of the sealing end portion 21a, that is, the guide hole 21c, and the sealing end portion 21a is elastically deformed so as to be crushed in the axial direction. It is elastically deformed. Therefore, the outer peripheral surface of the enlarged sealing end portion 21a and the periphery of the liquid injection hole 14c in the inner wall surface 14a are in close contact with each other and a surface pressure is established, and the inner peripheral surface of the sealing end portion 21a, The surface pressure is increased by close contact with the peripheral surface of the large-diameter portion 41 of the mandrel 40. Accordingly, the liquid injection hole 14 c is sealed by the seal member 21 due to the close contact.
また、マンドレル４０の操作部４３は、封止蓋３０の係止部３２に係止され、マンドレル４０は、大径部４１がシール用端部２１ａを弾性変形させた位置に位置決めされている。操作部４３が係止部３２に係止されることで、大径部４１によってシール用端部２１ａを弾性変形させた状態が維持されている。よって、本実施形態では、操作部４３と、係止部３２とから、シール部材２１で注液孔１４ｃを封止した状態を維持する維持構造が構成されている。 Further, the operation portion 43 of the mandrel 40 is locked to the locking portion 32 of the sealing lid 30, and the mandrel 40 is positioned at a position where the large diameter portion 41 elastically deforms the sealing end portion 21a. When the operating portion 43 is locked to the locking portion 32, the state where the sealing end portion 21a is elastically deformed by the large diameter portion 41 is maintained. Therefore, in the present embodiment, a maintenance structure that maintains the state in which the liquid injection hole 14 c is sealed with the seal member 21 is configured from the operation portion 43 and the locking portion 32.
また、大径部４１によってシール用端部２１ａが軸方向に押し潰された状態では、シール用端部２１ａの原形状への復帰力により、大径部４１が軸方向に沿って蓋１４から離れる方向へ付勢されている。このため、軸部４２を介して大径部４１と一体の操作部４３によって封止蓋３０が蓋１４に向けて押し付けられ、フランジ２３が蓋１４の外壁面１４ｂと封止蓋３０のフランジ側接触面３０ｂとの間で挟持されている。したがって、フランジ２３が蓋１４の外壁面１４ｂに密接し、フランジ２３により、ケース１１の外側で注液孔１４ｃがシールされている。 Further, in a state where the sealing end portion 21a is crushed in the axial direction by the large diameter portion 41, the large diameter portion 41 is removed from the lid 14 along the axial direction by a restoring force to the original shape of the sealing end portion 21a. It is biased away. For this reason, the sealing lid 30 is pressed toward the lid 14 by the operating portion 43 integral with the large-diameter portion 41 via the shaft portion 42, and the flange 23 is on the outer wall surface 14 b of the lid 14 and the flange side of the sealing lid 30. It is sandwiched between the contact surface 30b. Therefore, the flange 23 is in close contact with the outer wall surface 14 b of the lid 14, and the liquid injection hole 14 c is sealed on the outside of the case 11 by the flange 23.
次に、二次電池１０の製造方法について作用とともに説明する。
まず、ケース１１の注液孔１４ｃからケース１１内へ電解液１８を注入する。
次に、図５に示すように、封止部材２０のシール部材２１を大径部４１側から注液孔１４ｃに挿入するとともに、フランジ２３を蓋１４の外壁面１４ｂに係止させる。そして、操作部４３を把持して、マンドレル４０をシール部材２１から引き抜く方向へ移動させ、大径部４１をシール部材２１に向けて移動させる。すると、大径部４１がガイド孔２１ｃに入り込み、シール用端部２１ａが軸方向に押し潰されるとともに、内側から拡径される。
Next, the manufacturing method of the secondary battery 10 will be described together with the operation.
First, the electrolytic solution 18 is injected into the case 11 from the injection hole 14 c of the case 11.
Next, as shown in FIG. 5, the sealing member 21 of the sealing member 20 is inserted into the liquid injection hole 14 c from the large diameter portion 41 side, and the flange 23 is locked to the outer wall surface 14 b of the lid 14. Then, the operating portion 43 is gripped, the mandrel 40 is moved in the direction of pulling out from the sealing member 21, and the large diameter portion 41 is moved toward the sealing member 21. Then, the large diameter portion 41 enters the guide hole 21c, the sealing end portion 21a is crushed in the axial direction, and the diameter is increased from the inside.
その結果、図２に示すように、シール用端部２１ａが、注液孔１４ｃの周囲で蓋１４の内壁面１４ａに密接するとともに、大径部４１がシール用端部２１ａの内周面に密接し、注液孔１４ｃが仮封止される。その後、マンドレル４０を９０度回転させ、操作部４３を封止蓋３０の係止部３２に係止させるとともに、封止状態を維持させる。 As a result, as shown in FIG. 2, the sealing end portion 21a is in close contact with the inner wall surface 14a of the lid 14 around the injection hole 14c, and the large diameter portion 41 is formed on the inner peripheral surface of the sealing end portion 21a. The liquid injection hole 14c is temporarily sealed. Thereafter, the mandrel 40 is rotated by 90 degrees, and the operation portion 43 is locked to the locking portion 32 of the sealing lid 30 and the sealed state is maintained.
仮封止状態で、二次電池１０のエージングが行われる。すると、電解液１８と、電極組立体１２における各活物質との反応によりガスが発生する。このとき、注液孔１４ｃは封止部材２０によって封止されているため、ガスが注液孔１４ｃからケース１１外へ漏れることが抑制される。なお、仮封止状態では、ケース１１の内圧が過度に上昇せず、封止部材２０が内圧によって注液孔１４ｃから外れることは無く、封止部材２０の締結強度は過度に必要ない。 The secondary battery 10 is aged in the temporarily sealed state. Then, gas is generated by the reaction between the electrolytic solution 18 and each active material in the electrode assembly 12. At this time, since the liquid injection hole 14c is sealed by the sealing member 20, the leakage of gas from the liquid injection hole 14c to the outside of the case 11 is suppressed. In the temporarily sealed state, the internal pressure of the case 11 does not increase excessively, the sealing member 20 is not detached from the liquid injection hole 14c by the internal pressure, and the fastening strength of the sealing member 20 is not excessively necessary.
次に、封止部材２０を９０度回転させ、マンドレル４０をシール部材２１に入れ込む方向に移動させ、大径部４１をシール用端部２１ａから離間するように蓋１４から離れる方向へ移動させる。そして、操作部４３を待機用係止部３３に係止させる。 Next, the sealing member 20 is rotated 90 degrees, the mandrel 40 is moved in a direction to be inserted into the sealing member 21, and the large-diameter portion 41 is moved in a direction away from the lid 14 so as to be separated from the sealing end 21a. . Then, the operation portion 43 is locked to the standby locking portion 33.
すると、図５に示すように、大径部４１によるシール用端部２１ａの押し潰し及び拡径が解除され、シール用端部２１ａによる注液孔１４ｃの封止が解除される。すると、エージングで発生したガスが、注液孔１４ｃの内周面とシール部材２１の外周面の間、軸部４２の周面とシール部材２１の内周面との間からケース１１外へ放出される。 Then, as shown in FIG. 5, the crushing and expanding of the sealing end 21a by the large diameter portion 41 are released, and the sealing of the liquid injection hole 14c by the sealing end 21a is released. Then, gas generated by aging is discharged out of the case 11 between the inner peripheral surface of the liquid injection hole 14 c and the outer peripheral surface of the seal member 21, and between the peripheral surface of the shaft portion 42 and the inner peripheral surface of the seal member 21. Is done.
ガスを放出させた後、操作部４３を把持して、マンドレル４０をシール部材２１から引き抜く方向へ移動させ、大径部４１をシール部材２１に向けて移動させる。そして、操作部４３を、封止蓋３０の係止部３２に係止させる。すると、仮封止と同様に、シール用端部２１ａが、注液孔１４ｃの周囲で蓋１４の内壁面１４ａに密接するとともに、大径部４１がシール用端部２１ａの内周面に密接し、注液孔１４ｃが封止される。なお、本封止の場合は、フランジ２３を外壁面１４ｂに接着剤で接着し、そのフランジ２３に封止蓋３０を接着剤で接着してもよい。 After releasing the gas, the operating portion 43 is grasped, the mandrel 40 is moved in the direction of pulling out from the sealing member 21, and the large diameter portion 41 is moved toward the sealing member 21. Then, the operation portion 43 is locked to the locking portion 32 of the sealing lid 30. Then, like the temporary sealing, the sealing end portion 21a is in close contact with the inner wall surface 14a of the lid 14 around the liquid injection hole 14c, and the large diameter portion 41 is in close contact with the inner peripheral surface of the sealing end portion 21a. Then, the liquid injection hole 14c is sealed. In the case of the main sealing, the flange 23 may be bonded to the outer wall surface 14b with an adhesive, and the sealing lid 30 may be bonded to the flange 23 with an adhesive.
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は、マンドレル４０をシール部材２１から引き抜く方向へ移動させ、シール用端部２１ａを押し潰し、拡径させることで、注液孔１４ｃを封止可能である。また、封止部材２０は、マンドレル４０をシール部材２１に入れ込む方向へ移動させ、シール用端部２１ａの押し潰し及び拡径を解除することで、注液孔１４ｃの封止を解除できる。よって、ケース１１に電解液１８を注入し、注液孔１４ｃを封止部材２０で封止した後も、注液孔１４ｃの封止を解除できる。その結果、電解液１８と電極組立体１２の活物質が反応してガスが発生しても、そのガスをケース１１から放出することができる。よって、ガスによってケース１１の内圧が上昇し、ケース１１が膨張してしまうことを無くすことができる。
According to the above embodiment, the following effects can be obtained.
(1) The sealing member 20 can seal the liquid injection hole 14c by moving the mandrel 40 in the direction in which the mandrel 40 is pulled out from the sealing member 21, crushing the sealing end 21a, and expanding the diameter. Moreover, the sealing member 20 can cancel | release sealing of the liquid injection hole 14c by moving the mandrel 40 in the direction which puts in the sealing member 21, and canceling the crushing and diameter expansion of the edge part 21a for sealing. Therefore, even after injecting the electrolyte 18 into the case 11 and sealing the liquid injection hole 14c with the sealing member 20, the sealing of the liquid injection hole 14c can be released. As a result, even if the electrolytic solution 18 and the active material of the electrode assembly 12 react to generate gas, the gas can be released from the case 11. Therefore, it is possible to prevent the case 11 from expanding due to the gas increasing the internal pressure of the case 11.
よって、封止部材２０を蓋１４に溶接して注液孔１４ｃを封止した場合のように、ガス抜きの際には、溶接した封止部材２０を破壊する必要が無く、破壊に伴って発生した異物がケース１１内に残ることも無い。また、注液孔１４ｃをシール部材２１の拡径によって封止する。このため、例えば、注液孔１４ｃに雌ねじを形成し、その注液孔１４ｃに雄ねじを螺合して注液孔１４ｃを封止する場合のように、雄ねじ及び注液孔１４ｃとのねじ込み距離を十分に確保して注液孔１４ｃを封止する必要が無く、ねじ込み距離を確保するために壁部が厚くなることも無い。 Therefore, as in the case where the sealing member 20 is welded to the lid 14 and the liquid injection hole 14c is sealed, it is not necessary to destroy the welded sealing member 20 when degassing. The generated foreign matter does not remain in the case 11. Further, the liquid injection hole 14 c is sealed by expanding the diameter of the seal member 21. For this reason, for example, when a female screw is formed in the liquid injection hole 14c and the male screw is screwed into the liquid injection hole 14c to seal the liquid injection hole 14c, the screw-in distance between the male screw and the liquid injection hole 14c It is not necessary to sufficiently seal the liquid injection hole 14c, and the wall portion does not become thick in order to secure the screwing distance.
（２）封止部材２０は、フランジ２３を蓋１４と共に挟持する封止蓋３０を備え、この封止蓋３０は係止部３２を有する。そして、操作部４３を係止部３２に係止させることで、シール用端部２１ａで注液孔１４ｃを封止した状態を維持できる。また、操作部４３を係止部３２に係止させることで、ワンタッチで注液孔１４ｃを封止した状態に維持できる。 (2) The sealing member 20 includes a sealing lid 30 that holds the flange 23 together with the lid 14, and the sealing lid 30 has a locking portion 32. And the state which sealed the liquid injection hole 14c with the edge part 21a for a seal | sticker can be maintained by making the operation part 43 latch to the latching | locking part 32. FIG. Further, by locking the operation portion 43 to the locking portion 32, the liquid injection hole 14c can be maintained in a sealed state with one touch.
（３）封止蓋３０の係止部３２に操作部４３を係止させた状態では、押し潰されたシール用端部２１ａの原形状への復帰力により、操作部４３を介して封止蓋３０を蓋１４に近付く方向へ付勢することができる。このため、フランジ２３を封止蓋３０と蓋１４で挟持して、フランジ２３を蓋１４の外壁面１４ｂに密接させることができる。したがって、ケース１１の外側でも注液孔１４ｃを封止することができる。 (3) In a state where the operating portion 43 is locked to the locking portion 32 of the sealing lid 30, sealing is performed via the operating portion 43 by the restoring force of the crushed seal end 21 a to the original shape. The lid 30 can be biased in a direction approaching the lid 14. For this reason, the flange 23 can be held between the sealing lid 30 and the lid 14, and the flange 23 can be brought into close contact with the outer wall surface 14 b of the lid 14. Therefore, the liquid injection hole 14 c can be sealed even outside the case 11.
（４）シール部材２１は、シール用端部２１ａの内側にガイド孔２１ｃを備える。このため、マンドレル４０をシール部材２１から引き抜く方向へ移動させたとき、ガイド孔２１ｃにより大径部４１をシール用端部２１ａの内側に速やか、かつ確実に入り込ませることができる。 (4) The seal member 21 includes a guide hole 21c inside the seal end 21a. For this reason, when the mandrel 40 is moved in the direction in which the mandrel 40 is pulled out from the seal member 21, the large diameter portion 41 can be quickly and surely inserted into the seal end portion 21a by the guide hole 21c.
（５）シール部材２１は弾性変形可能である。このため、大径部４１による押し潰し、及び原形状への復帰を繰り返し行うことができ、封止部材２０による注液孔１４ｃの開閉を複数回に亘って行うことができる。 (5) The seal member 21 can be elastically deformed. For this reason, crushing by the large diameter part 41 and return to the original shape can be repeatedly performed, and the liquid injection hole 14c can be opened and closed by the sealing member 20 a plurality of times.
なお、上記実施形態は以下のように変更してもよい。
○ 図６に示すように、封止部材２０において、マンドレル４０の軸部４２に雄ねじ部４１ｂを形成する。また、マンドレル４０の操作部４３を削除するとともに、雄ねじ部４１ｂにナットＮを螺合して設ける。この場合、ナットＮとフランジ２３の間にワッシャＷを介装する。
In addition, you may change the said embodiment as follows.
As shown in FIG. 6, the male screw portion 41 b is formed on the shaft portion 42 of the mandrel 40 in the sealing member 20. Further, the operation portion 43 of the mandrel 40 is deleted, and a nut N is screwed into the male screw portion 41b. In this case, a washer W is interposed between the nut N and the flange 23.
このように構成した場合、ナットＮを、軸部４２の雄ねじ部４１ｂに対し螺進させると、マンドレル４０が、シール部材２１から引き抜く方向へ引き上げられていき、大径部４１によりシール用端部２１ａを押し潰すことができる。その結果、シール用端部２１ａで注液孔１４ｃを封止することができる。逆に、ナットＮを雄ねじ部４１ｂに対し螺退させると、マンドレル４０が、シール部材２１に入り込む方向へ移動していき、大径部４１によるシール用端部２１ａの押し潰しを解除することができる。その結果、シール用端部２１ａによる注液孔１４ｃの封止を解除することができる。 In such a configuration, when the nut N is screwed with respect to the male screw portion 41 b of the shaft portion 42, the mandrel 40 is pulled up in the direction of pulling out from the seal member 21, and the sealing end portion by the large diameter portion 41. 21a can be crushed. As a result, the liquid injection hole 14c can be sealed with the sealing end 21a. Conversely, when the nut N is screwed away from the male screw portion 41b, the mandrel 40 moves in the direction of entering the seal member 21, and the crushing of the end portion 21a for sealing by the large diameter portion 41 can be released. it can. As a result, the sealing of the liquid injection hole 14c by the sealing end portion 21a can be released.
○ 図７（ａ）に示すように、封止部材２０のシール部材５０を、軸方向一端に底部５１を有する中空円筒状に形成するとともに、シール部材５０の軸方向他端にフランジ５３を形成する。また、シール部材５０に軸方向他端に開口する凹部５２を形成する。そして、マンドレル４０の大径部４１を凹部５２に挿入し、マンドレル４０をシール部材５０に入れ込むようにして、シール部材５０の外周面を内側から拡径させる。その結果、図７（ｂ）に示すように、シール部材５０の外周面が注液孔１４ｃの内周面に密接し、注液孔１４ｃが封止される。 ○ As shown in FIG. 7A, the sealing member 50 of the sealing member 20 is formed in a hollow cylindrical shape having a bottom 51 at one end in the axial direction, and a flange 53 is formed at the other axial end of the sealing member 50. To do. Further, a recess 52 is formed in the seal member 50 so as to open to the other axial end. Then, the large-diameter portion 41 of the mandrel 40 is inserted into the recess 52, and the mandrel 40 is inserted into the seal member 50 so that the outer peripheral surface of the seal member 50 is expanded from the inside. As a result, as shown in FIG. 7B, the outer peripheral surface of the seal member 50 is in close contact with the inner peripheral surface of the liquid injection hole 14c, and the liquid injection hole 14c is sealed.
○ 封止蓋３０において、フランジ側接触面３０ｂと反対側の面は平坦面に形成されていてもよく、係止部３２及び待機用係止部３３は無くてもよい。
○ シール部材２１のガイド孔２１ｃは無くてもよく、シール部材２１の軸方向全体に亘って同一径の軸孔２１ｂが形成されていてもよい。
In the sealing lid 30, the surface opposite to the flange-side contact surface 30b may be formed as a flat surface, and the locking portion 32 and the standby locking portion 33 may not be provided.
The guide hole 21c of the sealing member 21 may not be provided, and the shaft hole 21b having the same diameter may be formed over the entire axial direction of the sealing member 21.
○ 仮封止の後、封止部材２０全体を注液孔１４ｃから抜いてガス抜きを行ってもよい。
○ 実施形態では、ケース１１の壁部として蓋１４に注液孔１４ｃを設けたが、壁部を本体部材１３の側壁とし、本体部材１３の側壁に注液孔を設けてもよい。
○ After temporary sealing, the entire sealing member 20 may be removed from the liquid injection hole 14c for degassing.
In the embodiment, the liquid injection hole 14 c is provided in the lid 14 as the wall portion of the case 11, but the wall portion may be the side wall of the main body member 13 and the liquid injection hole may be provided in the side wall of the main body member 13.
○ 封止蓋３０のフランジ側接触面３０ｂに突起を設けてもよい。このように構成した場合、操作部４３を係止部３２に係止させ、押し潰されたシール用端部２１ａの原形状への復帰力により、操作部４３が蓋１４に近付く方向へ付勢された状態では、突起によりフランジ２３を、さらに圧縮させることができる。その結果、フランジ２３により大きな面圧を立てることができ、蓋１４の外壁面１４ｂ側で、注液孔１４ｃをシールすることができる。 A protrusion may be provided on the flange-side contact surface 30 b of the sealing lid 30. When configured in this way, the operating portion 43 is locked to the locking portion 32, and the operating portion 43 is biased in the direction of approaching the lid 14 by the restoring force of the crushed seal end 21a to the original shape. In this state, the flange 23 can be further compressed by the protrusion. As a result, a large surface pressure can be set by the flange 23, and the liquid injection hole 14 c can be sealed on the outer wall surface 14 b side of the lid 14.
○ 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。 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.
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、１８…電解液、２０…封止部材、２１，５０…シール部材、２１ｂ…軸孔、２１ｃ…ガイド孔、２３…フランジ、３０…封止蓋、３０ａ…挿通孔、３２…維持構造を構成する係止部、４０…マンドレル、４１…大径部、４２…軸部、４３…維持構造を構成する操作部、５１…底部。 DESCRIPTION OF SYMBOLS 10 ... Secondary battery as an electrical storage device, 11 ... Case, 12 ... Electrode assembly, 14 ... Lid as wall part, 14b ... Outer wall surface, 14c ... Injection hole, 18 ... Electrolyte solution, 20 ... Sealing member, 21, 50 ... Sealing member, 21b ... Shaft hole, 21c ... Guide hole, 23 ... Flange, 30 ... Sealing lid, 30a ... Insertion hole, 32 ... Locking part constituting maintenance structure, 40 ... Mandrel, 41 ... Large Diameter portion, 42... Shaft portion, 43.
Claims (4)
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る蓄電装置であって、
前記封止部材は、
前記注液孔に挿入され、内側に軸孔を有する筒状であり、かつ弾性変形可能なシール部材と、
前記軸孔に挿入された軸部、及び前記軸部の端部のうちケース内側の端部に設けられ、かつ前記軸孔の直径よりも大径の大径部を備えるマンドレルと、を有し、
前記マンドレルを前記シール部材から引き抜く方向へ移動させることで、前記シール部材の前記ケース内に位置する部分が、前記大径部によって軸方向へ押し潰されるとともに内側から拡径されることにより、前記注液孔を封止可能にし、
前記シール部材で前記注液孔を封止した状態を維持する維持構造を備えることを特徴とする蓄電装置。 The electrode assembly and the electrolyte are accommodated in the case,
A power storage device having a liquid injection hole in the wall of the case and a sealing member for the liquid injection hole,
The sealing member is
A cylindrical member that is inserted into the liquid injection hole and has a shaft hole inside, and is elastically deformable, and
A shaft portion inserted into the shaft hole, and a mandrel provided at an end portion inside the case among the end portions of the shaft portion, and having a large diameter portion larger than the diameter of the shaft hole. ,
By moving the mandrel in the direction of pulling out from the seal member, the portion of the seal member located in the case is crushed in the axial direction by the large diameter portion and expanded from the inside, The injection hole can be sealed ,
A power storage device comprising: a maintenance structure that maintains a state in which the liquid injection hole is sealed with the seal member .
前記マンドレルは、前記軸部の端部のうちケース外側の端部に設けられた操作部を有しており、
前記維持構造は、前記操作部と、前記封止蓋に形成され、前記操作部が係止可能な係止部とを備える請求項１に記載の蓄電装置。 The seal member has a flange that engages with the outer wall surface of the wall portion around the liquid injection hole, the sealing member sandwiches the flange together with the wall portion, and the shaft portion is inserted therethrough. A sealing lid having an insertion hole
The mandrel has an operation part provided at an end part outside the case among the end parts of the shaft part,
The power storage device according to claim 1 , wherein the maintenance structure includes the operation portion and a locking portion that is formed on the sealing lid and that can lock the operation portion.
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| JP6736895B2 (en) * | 2016-01-28 | 2020-08-05 | 株式会社豊田自動織機 | Power storage device manufacturing method and power storage device |
| JP7024258B2 (en) * | 2017-08-29 | 2022-02-24 | 富士電機株式会社 | Coolers, plug members, and systems for semiconductor modules |
| CN107658420B (en) * | 2017-09-21 | 2020-12-04 | 五河县智凯环保科技有限公司 | Top cover for lithium ion secondary battery |
| JP6864853B2 (en) * | 2017-10-25 | 2021-04-28 | トヨタ自動車株式会社 | Temporary sealing plug for sealed batteries |
| CN108962610B (en) * | 2018-06-11 | 2023-08-11 | 铜陵泽辉电子有限责任公司 | High leakproofness capacitor cover plate |
| CN111192990A (en) * | 2020-01-23 | 2020-05-22 | 星恒电源股份有限公司 | Safety valve structure for lithium battery |
| CN112992533B (en) * | 2021-04-22 | 2022-01-14 | 阿德莱斯电气股份有限公司 | Oil leakage prevention capacitor |
| CN117497975B (en) * | 2023-12-29 | 2024-03-19 | 深圳海辰储能科技有限公司 | End cover assembly, energy storage device, electric equipment and liquid injection method |
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