WO2017183227A1 - 可撓性密閉蓄電セル、蓄電モジュール及び蓄電パック - Google Patents
可撓性密閉蓄電セル、蓄電モジュール及び蓄電パック Download PDFInfo
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- WO2017183227A1 WO2017183227A1 PCT/JP2016/085314 JP2016085314W WO2017183227A1 WO 2017183227 A1 WO2017183227 A1 WO 2017183227A1 JP 2016085314 W JP2016085314 W JP 2016085314W WO 2017183227 A1 WO2017183227 A1 WO 2017183227A1
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- Prior art keywords
- flexible
- lead terminal
- storage cell
- sealed
- terminal
- Prior art date
Links
- 210000000352 storage cell Anatomy 0.000 title claims abstract description 82
- 238000003860 storage Methods 0.000 title claims description 34
- 230000001681 protective effect Effects 0.000 claims abstract description 36
- 238000000605 extraction Methods 0.000 claims description 49
- 230000005611 electricity Effects 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 11
- 239000003792 electrolyte Substances 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 5
- 238000005304 joining Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 18
- 238000003466 welding Methods 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000000565 sealant Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000005021 flexible packaging material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/34—Gastight accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
- H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
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- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
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- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
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- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
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- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
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- 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
Definitions
- the present invention relates to a flexible sealed storage cell, a storage module, and a storage pack.
- Examples of the flexible sealed electricity storage cell include a laminate type battery cell and a laminate type capacitor cell.
- overcharge or overdischarge may occur depending on usage conditions or the like.
- the internal pressure of the flexible sealed battery cell may increase, and the contents of the flexible sealed battery cell may be ejected.
- the ejection of the contents of the flexible sealed electricity storage cell is not only the flexible sealed electricity storage cell but also the cause of the malfunction of the electricity storage pack including the flexible sealed electricity storage cell, the device provided with the electricity storage pack, etc. There was a case.
- Patent Document 1 discloses a sealed secondary battery.
- the sealed secondary battery of Patent Document 1 includes a bag-shaped container that houses a power generation element including a positive electrode plate, a separator, and a negative electrode plate.
- the bag-shaped container is formed in a bag shape by welding the periphery of the laminate material.
- a cut-out portion is formed in the welded portion at the periphery of the bag-like container.
- the welding strength at the cut portion is weaker than the weld strength at the portion other than the cut portion. Therefore, when the gas resulting from overcharge or overdischarge occurs in the bag-like container and the internal pressure rises, the excision part opens. As a result, gas is discharged from the opening generated in the excision part.
- the sealed secondary battery disclosed in Patent Document 1 improves the pressure release reliability by quickly discharging gas from a specific location, and suppresses the occurrence of defects.
- the welding strength at the cut portion must surely be weaker than the welding strength at portions other than the cut portion. Otherwise, an opening is formed in a portion other than the cut portion, and gas is discharged from the opening. In that case, the improvement of the pressure release reliability is not realized.
- the welding strength in the excision part must be sufficiently weaker than the welding strength in parts other than the excision part.
- the excision part opens before gas is generated in the bag-shaped container, and there is a possibility that liquid leakage occurs.
- the welding strength at the excision part is not sufficiently weak, there is a possibility that an opening is generated in a part other than the excision part.
- the welding strength at the excision part is too weak, there is a possibility that liquid leakage may occur before the internal pressure increases. Therefore, in the sealed secondary battery of Patent Document 1, the welding strength at the periphery of the bag-shaped container needs to be controlled with high accuracy.
- the sealed secondary battery is actually manufactured (for example, when the sealed secondary battery is mass-produced), there is a problem that it is difficult to accurately control the welding strength.
- An object of the present invention is to provide a flexible sealed storage cell that can suppress the occurrence of problems due to overcharge or overdischarge with a configuration that is easy to manufacture and assemble.
- the flexible sealed electricity storage cell according to the present invention is used in a state of being housed in the case so that power can be supplied from outside the case or outside the case.
- the flexible sealed storage cell is: A positive electrode and a negative electrode; A separator provided between the positive electrode and the negative electrode; Electrolyte, A housing portion that houses the positive electrode, the negative electrode, and the separator together with the electrolyte, and a closing portion that is formed on at least a part of the outer periphery of the housing portion to seal the housing portion, and has flexibility.
- a plate-like lead terminal having an external connection part for being electrically connected to a terminal for enabling supply of electric power outside the case;
- the lead terminal is positioned between the joint portion of the lead terminal with the closing part and the external connection part in the extending direction of the lead terminal and covers the front and back surfaces of the lead terminal in the width direction of the lead terminal and is flexible.
- a flexible inner part having flexibility and a flexible extension part extending from the flexible inner part at least in the thickness direction of the lead terminal and having flexibility.
- the present inventor made studies to obtain a flexible sealed storage cell that suppresses the occurrence of defects due to overcharge or overdischarge with a configuration that is easy to manufacture and assemble, and obtained the following knowledge.
- the flexible sealed storage cell is usually used in a state of being housed in the case so that power can be supplied from outside the case or outside the case.
- the flexible sealed battery stored in the case is another flexible sealed battery stored in the case, or a terminal for enabling power supply from outside the case or outside the case. Electrically connected.
- the bonding strength at the bonding portion between the closing portion of the flexible container and the plate-like lead terminal tends to be weakened by long-term use. Therefore, when the internal pressure of the flexible container rises due to overcharge or overdischarge, there is a high possibility that a gap is generated at the joint portion between the closing portion and the extraction terminal.
- the external connection portion of the lead terminal is a portion connected to another flexible sealed battery cell or a terminal for enabling power supply from outside the case or outside the case.
- the external connection part tends to be relatively hot. Therefore, there is a possibility that a problem occurs due to the contact between the high-concentration contents and the external connection portion. Contact between high-concentration contents and external connections must be avoided.
- the external connection part is located at a position away from the joint part between the closing part and the extraction terminal in the extension direction of the extraction terminal. Therefore, when the contents of the flexible container are ejected from the gap generated at the joint between the closing portion and the lead terminal, there is a high possibility that the contents of the flexible container will come into contact with the external connection portion. Therefore, in order to avoid contact between the contents ejected from the flexible container and the external connection portion, the joining strength is weak so that a gap is generated at a specific position other than the joining portion between the closing portion and the extraction terminal. It is conceivable to form the part on the periphery of the flexible container. However, as described above, it is difficult to accurately control the bonding strength so that a gap is surely generated at a specific position.
- the present inventor believes that the joint portion between the closing portion and the lead terminal, which is likely to generate a gap, and the external connection portion that should avoid contact with the contents of the flexible container are extended from the lead terminal. Focusing on the fact that they are separated in the outgoing direction, the inventors have come up with the idea of providing a flexible protective member using a lead terminal.
- the flexible sealed electricity storage cell includes a flexible protective member having flexibility.
- the flexible protection member includes a flexible inner portion having flexibility and a flexible extension portion having flexibility.
- the flexible inner portion is located between the joint portion with the closing portion of the extraction terminal and the external connection portion in the extending direction of the extraction terminal, and covers the front and back surfaces of the extraction terminal in the width direction of the extraction terminal.
- the flexible extension part extends from the flexible inner part at least in the thickness direction of the lead terminal.
- the flexible protection member is configured such that the flexible inner portion covers the front and back surfaces of the lead terminal in the width direction of the lead terminal and the flexible extension portion extends at least in the thickness direction of the lead terminal from the flexible inner portion. It is configured.
- the external connection portion is not located between the joint portion between the lead terminal and the closing portion and the flexible protective member. Therefore, the flexible protective member can suppress that the contents of the housing portion ejected from the gap generated between the lead-out terminal and the flexible housing body at the closing portion come into contact with the external connection portion. In particular, it is possible to suppress the contents of the storage portion ejected from the gap from directly contacting the external connection portion. Moreover, the flexible protective member can suppress that the content of the accommodating part which ejects from the said gap spreads widely when the flexible protective member contacts the flexible protective member. Contact between the high-concentration contents and the external connection portion can be effectively suppressed.
- the invention of the present application has a gap in the flexible container due to the nature of the flexible sealed storage cell used in a state of being housed in the case so that power can be supplied from outside the case or outside the case.
- a position where there is a high possibility of the occurrence of the problem is specified, and a flexible protective member is provided. Since the position where the countermeasure is applied is specified, the flexible protective member can be reduced in size and weight.
- the flexible protective member can be realized with a simple configuration so that it can be easily installed on the lead terminal.
- the present invention can suppress the occurrence of problems due to overcharge or overdischarge by a configuration that is easy to manufacture and assemble.
- FIG. 2A is a plan view of the flexible sealed storage cell shown in FIG. 1, and FIG. 2B is a side view thereof.
- FIG. Fig.4 (a) is a top view which shows typically the flexible sealed electrical storage cell of 2nd embodiment
- FIG.4 (b) is the side view.
- Fig.5 (a) is a side view which shows typically the flexible sealed electrical storage cell of 3rd embodiment
- FIG.5 (b) shows the flexible protection member and extraction terminal in Fig.5 (a).
- FIG. 5C is a partial enlarged cross-sectional view, FIG.
- FIG. 5C is a side view schematically showing the flexible sealed storage cell of the fourth embodiment
- FIG. 5D is a flexible view in FIG.
- FIG. 5E is a side view schematically showing the flexible sealed battery cell of the fifth embodiment
- FIG. 5E is a partially enlarged cross-sectional view of the flexible protection member and the lead terminal in FIG. 5E
- FIG. 5G is a side view schematically showing the flexible sealed storage cell of the sixth embodiment.
- 5 (h) is a partially enlarged cross-sectional view of the flexible protective member and the lead terminal in FIG. 5 (g).
- L indicates the extending direction of the lead terminal 30.
- the extending direction of the lead terminal 30 refers to a direction parallel to the direction in which the lead terminal 30 extends.
- the extending direction of the lead terminal 30 corresponds to, for example, the longitudinal direction of the flexible sealed battery cell 10.
- T indicates the thickness direction of the lead terminal 30.
- the thickness direction of the lead terminal 30 corresponds to the thickness direction of the flexible sealed battery cell 10, for example.
- W indicates the width direction of the lead terminal 30.
- the width direction of the extraction terminal 30 corresponds to the short direction of the flexible sealed battery cell 10, for example.
- the flexible sealed storage cell is a laminated battery cell, but the present invention is not limited to this example.
- the flexible sealed electricity storage cell may be, for example, a laminated capacitor cell.
- the battery is not particularly limited.
- An example of the battery is a lithium ion battery.
- the capacitor is not particularly limited.
- An example of the capacitor is a lithium ion capacitor.
- FIG. 1 is a perspective view schematically showing the flexible sealed electricity storage cell of the first embodiment.
- FIG. 2A is a plan view of the flexible sealed storage cell shown in FIG. 1, and
- FIG. 2B is a side view thereof.
- FIG. 3 is a partially enlarged cross-sectional view of the flexible sealed electricity storage cell shown in FIG.
- the flexible sealed storage cell 10 includes a flexible container 20, a lead terminal 30 (a positive lead terminal 30 a and a negative lead terminal 30 b), and a flexible protection member 40.
- the flexible container 20 includes a housing part 21 and a closing part 22 and has flexibility.
- the flexible container 20 is formed of a flexible packaging material.
- the term “flexibility” refers to a property capable of bending.
- Examples of flexible packaging materials include resin-laminated metal foil.
- the resin laminated metal foil is formed by laminating a resin film on one side or both sides of the metal foil.
- Examples of the material of the metal foil include aluminum, an aluminum alloy, and titanium.
- Examples of the material of the resin film include thermoplastic resins such as polyethylene and polypropylene.
- the resin film and / or metal foil to be laminated are not limited to one layer, but may be two or more layers. As shown in FIG.
- the accommodating portion 21 accommodates the positive electrode 11, the negative electrode 12, and the separator 13 together with the electrolyte 14.
- the plurality of positive electrodes 11 and the plurality of negative electrodes 12 are alternately arranged in the thickness direction T.
- a separator 13 is disposed between the positive electrode 11 and the negative electrode 12.
- the separator 13 is also arranged on the outermost side in the thickness direction T.
- the closing part 22 is a part formed on at least a part of the outer periphery of the accommodating part 21 in order to seal the accommodating part 21.
- the closing portion 22 is formed on the entire outer periphery of the accommodating portion 21.
- the closing part 22 is formed by welding or joining the peripheral edges of the two packaging materials overlapped in the thickness direction T to each other.
- the closing part 22 may be formed, for example, by welding or joining the peripheral edges of the two folded folded packaging materials to each other.
- Each flexible sealed storage cell 10 has a positive electrode extraction terminal 30a and a negative electrode extraction terminal 30b.
- the positive electrode lead terminal 30 a is electrically connected to the positive electrode 11 via the connection line 35 in the housing portion 21.
- the negative electrode lead terminal 30 b is electrically connected to the negative electrode 12 via the connection line 35 in the housing portion 21.
- the positive electrode extraction terminal 30a may be directly connected to the positive electrode 11.
- the negative electrode lead terminal 30b may be directly connected to the negative electrode 12.
- the lead terminal 30 refers to both the positive lead terminal 30a and the negative lead terminal 30b.
- Each lead terminal 30 has a plate shape.
- the width of the lead terminal 30 is larger than the thickness of the lead terminal 30.
- the width of the lead terminal 30 is the length of the lead terminal 30 in the width direction W.
- the thickness of the extraction terminal 30 is the length of the extraction terminal 30 in the thickness direction T.
- the lead terminal 30 includes a metal plate 32 and a sealant 33.
- the sealant 33 is provided so as to cover a part of the metal plate 32 in the extending direction L of the extraction terminal 30 in the width direction and the thickness direction of the metal plate 32.
- the sealant 33 at least partially overlaps the closing portion 22 of the flexible container 20 and is joined to the closing portion 22 by fusion or the like. As shown in FIG.
- the lead terminal 30 extends from the flexible container 20 so as to be partially exposed to the outside of the flexible container 20 from the closing part 22, and is flexible at the closing part 22.
- the container 20 is joined.
- the lead-out terminal does not necessarily have a sealant.
- the lead terminal may be composed of only a metal plate.
- the sealant 33 of the lead terminal 30 provided in the flexible container 20 is partially exposed to the outside of the flexible container 20, but the present invention is limited to this example. Not.
- the sealant 33 of the lead terminal 30 provided in the flexible container 20 may not be exposed from the flexible container 20.
- Each lead-out terminal 30 has an external connection portion 31 at a portion exposed to the outside of the flexible container 20.
- the external connection part 31a of the positive electrode lead terminal 30a of the upper flexible sealed battery cell 10 is connected to the external connection part 31b of the negative electrode lead terminal 30b of the lower flexible sealed battery cell 10.
- the external connection portion 31b of the negative electrode lead terminal 30b of the upper flexible sealed battery 10 is electrically connected to a negative electrode terminal (not shown) provided in the case 60 (see FIGS. 2A and 2B).
- the external connection portion 31 a of the positive electrode lead terminal 30 a of the lower flexible sealed storage cell 10 is electrically connected to a positive electrode terminal (not shown) provided in the case 60.
- the plurality (two) of flexible sealed energy storage cells 10 in the case 60 are connected in series, and are accommodated in the case 60 so that electric power can be supplied from outside the case 60 or outside the case 60.
- the electrical storage module 50 is comprised.
- Each flexible terminal 40 is provided with a flexible protective member 40.
- the flexible protection member 40 includes a flexible inner portion 41 and a flexible extension portion 42.
- the flexible protection member 40 has flexibility.
- the flexible protection member 40 is made of a flexible sheet material.
- the flexible sheet material is made of, for example, a non-conductive resin (insulating resin). It does not specifically limit as a nonelectroconductive resin, For example, thermoplastic resins, such as polyethylene and a polypropylene, etc. are mentioned.
- the flexible sheet-like material is thinner than the lead terminal 30 as shown in FIG.
- the flexible protection member 40 suppresses the contents of the storage portion 21 that are ejected from a gap generated between the lead terminal 30 and the flexible storage body 20 in the closing portion 22 from coming into contact with the external connection portion 31. It is configured.
- Z indicates a position where the gap is likely to occur.
- a flexible protective member 40 is provided between the position Z where the gap is likely to occur and the external connection portion 31.
- the flexible protection member 40 can suppress contact between the contents of the storage portion 21 ejected from the flexible storage body 20 and the external connection portion 31 with a configuration that is easy to manufacture and assemble.
- the flexible protective member 40 is separate from the sealant 33 of the extraction terminal 30.
- the flexible inner portion 41 is located between the joint portion with the closing portion 22 of the lead terminal 30 and the external connection portion 31 in the extending direction L of the lead terminal 30.
- the flexible inner portion 41 covers the front and back surfaces of the lead terminal 30 in the width direction W of the lead terminal 30.
- the surface of the lead terminal 30 is an upper surface when viewed from the thickness direction T, and the back surface of the lead terminal 30 is a lower surface when viewed from the thickness direction T.
- the flexible inner portion 41 has a sleeve shape that allows the lead terminal 30 to pass in the extending direction L.
- the flexible inner part 41 has flexibility.
- the flexible inner portion 41 refers to a portion of the flexible protection member 40 that is closest to the surface of the extraction terminal 30 and a portion that is closest to the back surface of the extraction terminal 30 in the thickness direction T of the extraction terminal 30.
- the flexible protection member 40 is preferably provided so that at least a part of the flexible inner portion 41 is in contact with the lead terminal 30. It is because it can suppress more effectively that the content of the accommodating part 21 which ejects from the clearance gap which arises between the extraction terminal 30 and the flexible accommodating body 20 in the closing part 22 contacts the external connection part 31.
- the flexible expansion portion 42 extends from the flexible inner portion 41 at least in the thickness direction T of the lead terminal 30.
- the flexible extension portion 42 extends from the flexible inner portion 41 in the thickness direction T and the width direction W of the lead terminal 30.
- the flexible extension 42 has flexibility.
- the flexible protective member 40 is formed such that at least an angle ⁇ formed by the flexible extension portion 42 and the lead terminal 30 forms an acute angle that opens toward the flexible container 20 as shown in FIG. 3. ing.
- the angle ⁇ is preferably an acute angle or a right angle. It is because it can suppress more effectively that the content of the accommodating part 21 which ejects from the clearance gap which arises between the extraction terminal 30 and the flexible accommodating body 20 in the closing part 22 contacts the external connection part 31.
- the flexible protective member 40 is supported by the lead terminal 30.
- the lead terminal 30 supports at least a part of the weight of the flexible protection member 40.
- the flexible protection member 40 is provided on the lead terminal 30 so that at least a part of the flexible inner portion 41 is in contact with the lead terminal 30. In this case, it is preferable that at least a part of the flexible inner portion 41 is in contact with the lead terminal 30 in the thickness direction T.
- the flexible inner portion 41 has a portion that does not contact the extraction terminal 30 in the thickness direction T, the distance of the gap between the portion in the thickness direction T and the extraction terminal 30 is the thickness of the extraction terminal 30. Or less.
- the flexible protection member 40 may be supported by the extraction terminal 30 so as to be fixed to the extraction terminal 30, or may be supported by the extraction terminal 30 without being fixed to the extraction terminal 30.
- the flexible protection member 40 may be provided so as to contact the flexible container 20 or may be provided so as not to contact the flexible container 20.
- the flexible protection member 40 is not fixed to the flexible container 20. Even if the flexible protection member 40 is not fixed to the flexible container 20, the contents of the container 21 ejected from the flexible container 20 can be prevented from coming into contact with the external connection part 31. Therefore, the flexible protective member 40 can suppress contact between the contents of the storage portion 21 ejected from the flexible storage body 20 and the external connection portion 31 with a configuration that is easy to manufacture and assemble.
- the flexible protective member 40 is provided so as not to overlap the accommodating portion 21 when viewed from the thickness direction T of the extraction terminal 30 as shown in FIG. More specifically, the flexible protection member 40 is provided so that the flexible extension portion 42 does not overlap the accommodating portion 21 when viewed from the thickness direction T of the lead terminal 30. As described above, in the present embodiment, it is possible to suppress the contact between the contents of the storage portion 21 ejected from the flexible storage body 20 and the external connection portion 31 with a configuration that is easy to manufacture and assemble.
- the pair of lead terminals 30 when viewed from the thickness direction T, extend from one side of the rectangular flexible sealed storage cell 10, and the flexible protection member 40 includes a plurality of flexible terminals 40.
- the flexible protection member 40 includes a plurality of flexible terminals 40.
- each of the flexible sealed electricity storage cells 10 is individually provided to each of the pair of lead terminals 30 has been described. That is, in the first embodiment, all the flexible protection members 40 are provided on one side of the rectangular flexible sealed electricity storage cell 10.
- the present invention is not limited to this embodiment.
- the present invention can employ, for example, second to sixth embodiments described later.
- FIGS. 4A to 5H the same reference numerals as those in the first embodiment are assigned to the components corresponding to those in the first embodiment.
- the configuration different from the first embodiment will be mainly described, and the description of the same configuration as the first embodiment will be omitted.
- FIG.4 (a) is a top view which shows typically the flexible sealed electrical storage cell 10 of 2nd embodiment
- FIG.4 (b) is the side view.
- each flexible sealed electricity storage cell 10 when viewed from the thickness direction T, each of the pair of lead terminals 30 extends in the extending direction L from each of the both sides of the rectangular flexible sealed electricity storage cell 10.
- the external connection part 31a of the positive electrode lead terminal 30a of the upper flexible sealed battery cell 10 is connected to the external connection part 31b of the negative electrode lead terminal 30b of the lower flexible sealed battery cell 10.
- the external connection portion 31b of the negative electrode lead terminal 30b of the upper flexible sealed battery cell 10 is electrically connected to a negative electrode terminal (not shown) provided in the case. Further, the external connection portion 31a of the positive electrode lead terminal 30a of the lower flexible sealed battery cell 10 is electrically connected to a positive electrode terminal (not shown) provided in the case.
- the flexible protection member 40 is provided on each of the pair of lead terminals 30 included in each of the plurality of flexible sealed energy storage cells 10. In the second embodiment, the flexible protection members 40 are provided on both sides of the rectangular flexible sealed electricity storage cell 10. Since the configuration of the flexible protection member 40 is the same as that of the flexible protection member 40 of the first embodiment, description thereof is omitted here.
- FIG. 5A is a side view schematically showing the flexible sealed electricity storage cell 10 of the third embodiment, as viewed from the extending direction L of the extraction terminal 30, and FIG. It is a partial expanded sectional view of the flexible protection member 40 and the extraction terminal 30 in (a).
- the flexible sealed electrical storage cell 10 of 3rd embodiment has the same structure as the flexible sealed electrical storage cell 10 of 1st embodiment.
- three flexible sealed storage cells 10 that are overlapped in the thickness direction T are accommodated in a case (not shown).
- Each lead terminal 30 is provided with a flexible protective member 40 individually.
- Each flexible protection member 40 has a folding line 43 extending in the width direction W of the lead terminal 30 such that an angle ⁇ (see FIG.
- each flexible protection member 40 has one through hole formed along the folding line 43.
- the lead terminal 30 is inserted through the through hole.
- the outer edge of the through hole of the flexible protection member 40 constitutes the flexible inner portion 41 of the flexible protection member 40.
- the flexible protective member 40 of the third embodiment does not have the sleeve-like flexible inner portion 41.
- the flexible extended portion 42 extends from the flexible inner portion 41 in the thickness direction T of the lead terminal 30.
- FIG.5 (c) is a side view which shows typically the flexible sealed electrical storage cell 10 of 4th embodiment seen from the extension direction L of the extraction terminal 30, and FIG.5 (d) is FIG. It is a partial expanded sectional view of the flexible protection member 40 and the extraction terminal 30 in (c).
- one flexible protection member 40 is provided for each pair of lead terminals 30 provided in the flexible sealed battery cell 10.
- Each flexible protection member 40 has a folding line extending in the width direction W of the lead terminal 30 such that an angle ⁇ (see FIG. 5D) formed by the flexible extension portion 42 and the lead terminal 30 is an acute angle. It consists of one flexible sheet-like material bent along 43 (refer FIG.5 (c)).
- Each flexible protection member 40 has two through holes formed along the folding line 43 and spaced from each other.
- the lead terminals 30 are inserted through the respective through holes.
- Each outer edge of the two through holes of the flexible protection member 40 constitutes two flexible inner portions 41 of the flexible protection member 40.
- the flexible extended portion 42 extends from each flexible inner portion 41 in the thickness direction T and the width direction W of the lead terminal 30.
- FIG.5 (e) is a side view which shows typically the flexible sealed electrical storage cell 10 of 5th embodiment seen from the extension direction L of the extraction terminal 30, FIG.5 (f) is FIG. It is a partial expanded sectional view of the flexible protection member 40 and the extraction terminal 30 in (e).
- the flexible sealed electricity storage cell 10 of the fifth embodiment has the same configuration as the flexible sealed electricity storage cell 10 of the second embodiment.
- a plurality (three) of flexible sealed energy storage cells 10 stacked in the thickness direction T are packed in a case (not shown). As shown in FIG.
- a plurality (three) of lead terminals 30 arranged in the thickness direction T are extended from one side of the plurality (three) of flexible sealed storage cells 10.
- One flexible protective member 40 is provided on a plurality (three) of lead terminals 30 extended from one side of a plurality (three) of flexible sealed storage cells 10 so as to be arranged in the thickness direction T.
- a plurality of lead terminals 30 arranged in the thickness direction T are also extended from another side of the plurality of flexible sealed storage cells 10, and a flexible protection member 40 is provided on the plurality of lead terminals 30. It has been.
- the flexible protective member 40 is made of a single flexible sheet-like material formed in a bellows shape by being alternately bent along a plurality of folding lines 43 extending in the width direction W of the lead terminal 30.
- the number of folding lines 43 is five, which is the sum of the number of extraction terminals 30 (three) and the number of gaps between the extraction terminals 30 (two).
- the flexible protective member 40 has a plurality (three) of through holes formed along a folding line 43 corresponding to each of the plurality (three) of the lead terminals 30.
- the lead terminals 30 are inserted through the through holes, respectively.
- Each outer edge of the three through holes of the flexible protection member 40 constitutes three flexible inner portions 41 of the flexible protection member 40.
- the flexible extension portion 42 is configured to extend from each of the flexible inner portions 41 in the thickness direction T of the lead terminal 30. Since the flexible protective member 40 of the fifth embodiment has a bellows shape so that it can expand and contract in the thickness direction T, alignment when the flexible protective member 40 is provided on the plurality of lead terminals 30 is performed. Is easy. It is easier to manufacture and assemble.
- FIG. 5G is a side view schematically showing the flexible sealed electricity storage cell 10 of the sixth embodiment as seen from the extending direction L of the extraction terminal 30, and FIG. It is a partial expanded sectional view of the flexible protection member 40 and the extraction terminal 30 in (g).
- the flexible sealed storage cell 10 of the sixth embodiment has the same configuration as the flexible sealed storage cell 10 of the fourth embodiment.
- a pair of lead terminals 30 arranged so as to be spaced from each other so as to be aligned in the width direction W are extended from each of the plurality of flexible sealed storage cells 10 overlapped in the thickness direction T. Accordingly, a plurality of pairs (three pairs) of lead terminals 30 are extended from one side of the plurality of flexible sealed storage cells 10 so as to be arranged in the thickness direction.
- the flexible protective member 40 is made of a single flexible sheet-like material formed in a bellows shape, as in the fifth embodiment (FIGS. 5E and 5F).
- the flexible protection member 40 has a plurality of pairs (three pairs) of through holes formed along a folding line 43 corresponding to each of a plurality of pairs (three pairs) of the lead terminals 30.
- the lead terminals 30 are inserted through the through holes, respectively.
- the outer edges of each of the six through holes of the flexible protection member 40 constitute six flexible inner portions 41 of the flexible protection member 40.
- the flexible extension portion 42 is configured to extend from each of the flexible inner portions 41 in the thickness direction T and the width direction W of the lead terminal 30.
- the flexible protective member 40 individually has a through hole corresponding to each of a pair of the lead terminals 30 that are adjacent to each other with an interval in the width direction W.
- a through-hole for each extraction terminal 30 it is possible to more effectively suppress the contact between the contents of the storage portion ejected from the flexible storage body and the external connection portion.
- the present invention is not limited to this example.
- the flexible protection member 40 may have a through-hole extending in the width direction W formed so as to correspond to both of the plurality of adjacent lead terminals 30 with an interval in the width direction W.
- the flexible protective member 40 has a through hole as a portion through which the extraction terminal 30 is inserted in the extending direction L.
- the present invention is not limited to this example. Instead of the through hole, a slit that reaches the outer edge on one side of the flexible protective member 40 in the width direction W may be formed.
- the flexible protective member 40 is bent along the folding line 43, but the flexible protective member 40 may not be bent.
- the angle ⁇ is, for example, a right angle.
- the number of flexible sealed storage cells accommodated in one case is not particularly limited, and may be one or plural.
- the connection aspect of a some flexible sealed electrical storage cell is not specifically limited.
- the plurality of flexible sealed energy storage cells may be connected in series to each other, may be connected in parallel, or may be connected by a combination of parallel connection and series connection.
- the power storage module is provided with at least one possible housing accommodated in the case so that power can be supplied from outside the case or outside the case.
- a flexible sealed electricity storage cell and a case are provided.
- the power storage pack includes at least one power storage module.
- the power storage pack may include a battery controller for monitoring and controlling the state of the flexible sealed power storage cell included in the power storage module.
- the storage pack also includes a sensor connected to the battery controller so as to detect the state (eg, voltage value, current value, temperature, etc.) of the flexible sealed storage cell and output the detection result to the battery controller. It may be.
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Abstract
Description
正極及び負極と、
前記正極と負極との間に設けられるセパレータと、
電解質と、
前記正極及び負極と前記セパレータとを前記電解質とともに収容する収容部と、前記収容部を密閉するために前記収容部の外周の少なくとも一部に形成される閉止部とを備え、可撓性を有する可撓性収容体と、
前記閉止部から前記可撓性収容体の外部に部分的に露出するように前記可撓性収容体から延出され且つ前記閉止部において前記可撓性収容体と接合されるとともに、前記収容部の内部において前記正極及び前記負極の各々とそれぞれ接続され、前記可撓性収容体の外部に露出する部分に、前記ケース内に収容された他の可撓性密閉蓄電セル又は前記ケース外から若しくは前記ケース外への電力の供給を可能とするための端子と電気的に接続されるための外部接続部を有する板状の引出端子と、
前記引出端子の延出方向において前記引出端子の前記閉止部との接合部分と前記外部接続部との間に位置するとともに前記引出端子の表面及び裏面を前記引出端子の幅方向に覆い且つ可撓性を有する可撓性内側部と、前記可撓性内側部から少なくとも前記引出端子の厚さ方向に拡がり且つ可撓性を有する可撓性拡張部とを含み、可撓性を有する可撓性保護部材と
を備える。
図1は、第一実施形態の可撓性密閉蓄電セルを模式的に示す斜視図である。図2(a)は、図1に示す可撓性密閉蓄電セルの平面図であり、図2(b)は、その側面図である。図3は、図1に示す可撓性密閉蓄電セルの部分拡大断面図である。
図4(a)は、第二実施形態の可撓性密閉蓄電セル10を模式的に示す平面図であり、図4(b)は、その側面図である。
図5(a)は、引出端子30の延出方向Lから見た、第三実施形態の可撓性密閉蓄電セル10を模式的に示す側面図であり、図5(b)は、図5(a)における可撓性保護部材40及び引出端子30の部分拡大断面図である。可撓性保護部材40以外の構成については、第三実施形態の可撓性密閉蓄電セル10は、第一実施形態の可撓性密閉蓄電セル10と同じ構成を有している。第三実施形態では、厚さ方向Tに重ね合わされた3つの可撓性密閉蓄電セル10が、ケース(図示せず)内に収容されている。各引出端子30には、個別に可撓性保護部材40が設けられている。各可撓性保護部材40は、可撓性拡張部42と引出端子30とが成す角α(図5(b)参照)が鋭角になるように引出端子30の幅方向Wに延びる折曲線43(図5(a)参照)に沿って折り曲げられた1枚の可撓性シート状材料からなる。各可撓性保護部材40は、折曲線43に沿って形成された1つの貫通孔を有している。貫通孔に引出端子30が挿通されている。第三実施形態では、可撓性保護部材40の貫通孔の外縁が、可撓性保護部材40の可撓性内側部41を構成している。第三実施形態の可撓性保護部材40は、スリーブ状の可撓性内側部41を有していない。可撓性拡張部42は、可撓性内側部41から引出端子30の厚さ方向Tに拡がっている。
図5(c)は、引出端子30の延出方向Lから見た、第四実施形態の可撓性密閉蓄電セル10を模式的に示す側面図であり、図5(d)は、図5(c)における可撓性保護部材40及び引出端子30の部分拡大断面図である。第四実施形態では、第三実施形態と異なり、可撓性密閉蓄電セル10が備える一対の引出端子30ごとに、1つの可撓性保護部材40が設けられている。各可撓性保護部材40は、可撓性拡張部42と引出端子30とが成す角α(図5(d)参照)が鋭角になるように、引出端子30の幅方向Wに延びる折曲線43(図5(c)参照)に沿って折り曲げられた1枚の可撓性シート状材料からなる。各可撓性保護部材40は、折曲線43に沿って互いに間隔を空けて形成された2つの貫通孔を有している。各貫通孔にそれぞれ引出端子30が挿通されている。可撓性保護部材40の2つの貫通孔の各々の外縁が、可撓性保護部材40が有する2つの可撓性内側部41を構成している。可撓性拡張部42は、各可撓性内側部41から引出端子30の厚さ方向T及び幅方向Wに拡がっている。
図5(e)は、引出端子30の延出方向Lから見た、第五実施形態の可撓性密閉蓄電セル10を模式的に示す側面図であり、図5(f)は、図5(e)における可撓性保護部材40及び引出端子30の部分拡大断面図である。可撓性保護部材40以外の構成については、第五実施形態の可撓性密閉蓄電セル10は、第二実施形態の可撓性密閉蓄電セル10と同じ構成を有している。第五実施形態では、厚さ方向Tに重ね合わされた複数(3つ)の可撓性密閉蓄電セル10が、ケース(図示せず)内にパックされている。図5(e)に示すように、厚さ方向Tに並ぶ複数(3つ)の引出端子30が、複数(3つ)の可撓性密閉蓄電セル10の片側から延出されている。1つの可撓性保護部材40が、厚さ方向Tに並ぶように複数(3つ)の可撓性密閉蓄電セル10の片側から延出された複数(3つ)の引出端子30に設けられている。図示しないが、厚さ方向Tに並ぶ複数の引出端子30が、複数の可撓性密閉蓄電セル10の別の片側からも延出され、複数の引出端子30に可撓性保護部材40が設けられている。
図5(g)は、引出端子30の延出方向Lから見た、第六実施形態の可撓性密閉蓄電セル10を模式的に示す側面図であり、図5(h)は、図5(g)における可撓性保護部材40及び引出端子30の部分拡大断面図である。可撓性保護部材40以外の構成については、第六実施形態の可撓性密閉蓄電セル10は、第四実施形態の可撓性密閉蓄電セル10と同じ構成を有している。厚さ方向Tに重ね合わされた複数の可撓性密閉蓄電セル10の各々から、互いに幅方向Wに並ぶように間隔を空けて配置された一対の引出端子30が延出されている。従って、厚さ方向に並ぶように複数の可撓性密閉蓄電セル10の片側から、複数対(3対)の引出端子30が延出されている。
11 正極
12 負極
13 セパレータ
14 電解質
20 可撓性収容体
21 収容部
22 閉止部
30 引出端子
30a 正極引出端子
30b 負極引出端子
31 外部接続部
31a (正極引出端子30aの外部接続部)
31b (負極引出端子30bの外部接続部)
32 金属板状体
33 シーラント
35 接続線
40 可撓性保護部材
41 可撓性内側部
42 可撓性拡張部
43 折曲線
50 蓄電モジュール
60 ケース
Claims (10)
- ケース外から又は前記ケース外への電力の供給が可能なように前記ケース内に収容された状態で用いられる可撓性密閉蓄電セルであって、
前記可撓性密閉蓄電セルは、
正極及び負極と、
前記正極と負極との間に設けられるセパレータと、
電解質と、
前記正極及び負極と前記セパレータとを前記電解質とともに収容する収容部と、前記収容部を密閉するために前記収容部の外周の少なくとも一部に形成される閉止部とを備え、可撓性を有する可撓性収容体と、
前記閉止部から前記可撓性収容体の外部に部分的に露出するように前記可撓性収容体から延出され且つ前記閉止部において前記可撓性収容体と接合されるとともに、前記収容部の内部において前記正極及び前記負極の各々とそれぞれ接続され、前記可撓性収容体の外部に露出する部分に、前記ケース内に収容された他の可撓性密閉蓄電セル又は前記ケース外から若しくは前記ケース外への電力の供給を可能とするための端子と電気的に接続されるための外部接続部を有する板状の引出端子と、
前記引出端子の延出方向において前記引出端子の前記閉止部との接合部分と前記外部接続部との間に位置するとともに前記引出端子の表面及び裏面を前記引出端子の幅方向に覆い且つ可撓性を有する可撓性内側部と、前記可撓性内側部から少なくとも前記引出端子の厚さ方向に拡がり且つ可撓性を有する可撓性拡張部とを含み、可撓性を有する可撓性保護部材と
を備える。 - 請求項1に記載の可撓性密閉蓄電セルであって、
前記可撓性保護部材は、少なくとも前記可撓性拡張部と前記引出端子とが、直角又は前記可撓性収容体へ向けて開く鋭角を成すように形成されている。 - 請求項1又は2に記載の可撓性密閉蓄電セルであって、
前記可撓性保護部材は、前記可撓性内側部の少なくとも一部が前記引出端子と接触するように設けられている。 - 請求項1~3のいずれか1に記載の可撓性密閉蓄電セルであって、
前記可撓性保護部材は、前記引出端子に支持されている。 - 請求項1~4のいずれか1に記載の可撓性密閉蓄電セルであって、
前記可撓性保護部材は、前記引出端子の厚さ方向から見た時に前記収容部と重ならないように設けられている。 - 請求項1~5のいずれか1に記載の可撓性密閉蓄電セルであって、
前記可撓性保護部材は、可撓性シート状材料からなる。 - 請求項6に記載の可撓性密閉蓄電セルであって、
前記可撓性シート状材料は、前記引出端子よりも薄い。 - 請求項1~7のいずれか1に記載の可撓性密閉蓄電セルであって、
前記可撓性保護部材は、前記閉止部において前記引出端子と前記可撓性収容体との間に生じる間隙から噴出する前記収容部の内容物が前記外部接続部に接触することを抑制するように構成されている。 - 蓄電モジュールであって、
前記蓄電モジュールは、請求項1~8のいずれか1に記載の少なくとも一つの可撓性密閉蓄電セルと、ケースとを備え、
前記少なくとも一つの可撓性密閉蓄電セルは、前記ケース外から又は前記ケース外への電力の供給が可能なように前記ケース内に収容される。 - 蓄電パックであって、
前記蓄電パックは、
請求項9に記載の少なくとも一つの蓄電モジュールを備える。
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EP16899498.6A EP3439069A4 (en) | 2016-04-19 | 2016-11-29 | SOFT AND FLEXIBLE ELECTRICITY STORAGE CELL, ELECTRICITY STORAGE MODULE AND ELECTRICITY STORAGE BLOCK |
KR1020187026505A KR20180112009A (ko) | 2016-04-19 | 2016-11-29 | 가요성 밀폐 축전 셀, 축전 모듈 및 축전 팩 |
CA3021493A CA3021493A1 (en) | 2016-04-19 | 2016-11-29 | Flexible sealed accumulator cell, accumulator module, and accumulator pack |
JP2018512774A JP6577664B2 (ja) | 2016-04-19 | 2016-11-29 | 可撓性密閉蓄電セル、蓄電モジュール及び蓄電パック |
CN201680084737.3A CN109075287A (zh) | 2016-04-19 | 2016-11-29 | 柔性密封式蓄电池单元、蓄电池模块和蓄电池包 |
TW105142677A TWI627782B (zh) | 2016-04-19 | 2016-12-22 | Flexible sealed power storage unit, power storage module and power storage unit |
US16/164,886 US20190051869A1 (en) | 2016-04-19 | 2018-10-19 | Flexible sealed accumulator cell, accumulator module, and accumulator pack |
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CA3021493A1 (en) | 2017-10-26 |
EP3439069A4 (en) | 2019-03-20 |
KR20180112009A (ko) | 2018-10-11 |
TW201739083A (zh) | 2017-11-01 |
JPWO2017183227A1 (ja) | 2019-03-22 |
CN109075287A (zh) | 2018-12-21 |
TWI627782B (zh) | 2018-06-21 |
JP6577664B2 (ja) | 2019-09-18 |
US20190051869A1 (en) | 2019-02-14 |
EP3439069A1 (en) | 2019-02-06 |
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