WO2011024286A1 - 電池、車両及び電池搭載機器 - Google Patents
電池、車両及び電池搭載機器 Download PDFInfo
- Publication number
- WO2011024286A1 WO2011024286A1 PCT/JP2009/065032 JP2009065032W WO2011024286A1 WO 2011024286 A1 WO2011024286 A1 WO 2011024286A1 JP 2009065032 W JP2009065032 W JP 2009065032W WO 2011024286 A1 WO2011024286 A1 WO 2011024286A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- negative electrode
- positive electrode
- battery
- resin
- electrode terminal
- Prior art date
Links
- 239000011347 resin Substances 0.000 claims abstract description 200
- 229920005989 resin Polymers 0.000 claims abstract description 200
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 18
- 238000007747 plating Methods 0.000 claims description 17
- 238000004381 surface treatment Methods 0.000 claims description 16
- 238000010248 power generation Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 description 47
- 229910052751 metal Inorganic materials 0.000 description 24
- 239000002184 metal Substances 0.000 description 24
- 238000007654 immersion Methods 0.000 description 13
- 239000008151 electrolyte solution Substances 0.000 description 12
- 238000012986 modification Methods 0.000 description 12
- 230000004048 modification Effects 0.000 description 12
- 230000000149 penetrating effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000035515 penetration Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- -1 triazine thiols Chemical class 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 108010025037 T140 peptide Proteins 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- FONGJDIXARLBKN-UHFFFAOYSA-N 1H-triazine-4,5,6-trithione Chemical compound N1N=NC(C(C1=S)=S)=S FONGJDIXARLBKN-UHFFFAOYSA-N 0.000 description 1
- PVFSNBPKQDSTPP-UHFFFAOYSA-N 2-(methylaminomethyl)phenol Chemical compound CNCC1=CC=CC=C1O PVFSNBPKQDSTPP-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical class [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000004453 electron probe microanalysis Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention comprises a positive electrode terminal member made of aluminum and extending from the inside of the battery case to the outside thereof, a negative electrode terminal member made of copper and extending from the inside of the battery case to the outside thereof, and a positive electrode terminal member
- a battery comprising: a positive-side resin member that covers a part of the negative electrode member that covers the periphery of the negative electrode terminal member; and a negative electrode-side resin member that covers a part of the negative electrode terminal member and that covers the part of the negative electrode terminal member. It relates to on-board equipment.
- batteries used for these driving power sources are increasing.
- Some of such batteries include two electrode terminal members (a positive electrode terminal member and a negative electrode terminal member) that extend to the outside of the battery case while being electrically connected to a power generation element inside the battery.
- Patent Document 1 a plate-shaped lid made of metal, two electrode terminals (a positive terminal member and a negative terminal member) that are inserted through two through holes formed in the lid, and the lid
- the body and the electrode terminals are insert-molded to insulate the lid and the electrode terminals, and have two insulating sealing members (a positive-side resin member and a negative-side resin member) that integrally fix them.
- An upper lid of a lithium battery is disclosed. Both the two electrode terminals and the two insulating sealing members of the upper lid have the same shape on both the positive electrode side and the negative electrode side.
- the adhesion (sealability) between the negative electrode side resin member and the negative electrode terminal member is lower than the sealability between the positive electrode side resin member and the positive electrode terminal member. It turns out that it is easy. For this reason, for example, when the positive electrode side resin member and the negative electrode side resin member, and the positive electrode terminal member and the negative electrode terminal member have the same shape, the sealing property between the positive electrode side resin member and the positive electrode terminal member is still unclear. Even if it is sufficiently maintained, it has been found that the sealing performance between the negative electrode side resin member and the negative electrode terminal member is lowered first, and as a result, problems such as electrolyte leakage occur as a battery. .
- the battery of Patent Document 1 in which the positive electrode side resin member and the negative electrode side resin member, and the positive electrode terminal member and the negative electrode terminal member have the same shape, respectively, has a sealing performance (seal durability) between the positive electrode side and the negative electrode side.
- the balance is bad.
- the sealing property on the positive electrode side still has sufficient characteristics, problems such as liquid leakage of the electrolytic solution occur due to the deterioration of the sealing property on the negative electrode side that occurs earlier. There is a risk of it.
- the present invention has been made in view of such a problem, and the sealing performance between the negative electrode side resin member and the negative electrode terminal member and the sealing performance between the positive electrode side resin member and the positive electrode terminal member.
- a battery with good durability is provided by balancing the durability of the seals so that the time of the decrease of the two becomes the same period.
- it aims at providing the vehicle and battery mounting apparatus which mount such a battery with favorable battery durability.
- One aspect of the present invention is a power generation element including a positive electrode plate and a negative electrode plate, a battery case containing the power generation element, and made of aluminum, electrically connected to the positive electrode plate, and from the inside of the battery case.
- the positive electrode The positive electrode resin contact surface to which the positive electrode side resin member is in close contact among the child members and the negative electrode resin contact surface to which the negative electrode side resin member is in close contact among the negative electrode terminal members are both the positive electrode resin.
- the length of the negative electrode seal length is longer than the positive electrode seal length which is the length of the shortest path among the positive electrode seal paths from the inside of the battery case to the outside of the battery case on the positive electrode resin adhesion surface. It is a battery that is made.
- the seal durability between the negative electrode side resin member and the negative electrode terminal member is lower than the seal durability between the positive electrode side resin member and the positive electrode terminal member. This is considered to be because the seal durability varies depending on the difference in the material of the surface-treated metal. That is, it is considered that aluminum forming the positive electrode terminal member generates a larger binding force (adhesion force) due to the surface treatment than copper forming the negative electrode terminal member.
- the negative electrode seal length (described above) between the negative electrode side resin member and the negative electrode terminal member is relatively longer than the positive electrode seal length (described above).
- the sealing durability between the resin member and the negative electrode terminal member and the sealing durability between the positive electrode side resin member and the positive electrode terminal member can be set to the same level, and a balance between the two can be achieved.
- a balance between the two can be achieved.
- the thing of one member which consists of integral molding, and the thing which consists of two or more members are mentioned, for example.
- the surface treatment method include surface treatment with organic plating or a silane coupling agent.
- the battery is the above-described battery, in which the positive electrode resin contact surface and the negative electrode resin contact surface are subjected to organic plating.
- organic plating means that triazine thiols, organic phosphoric acid or organic carboxylic acid alkali or amine salt, or the like is used, and the surface of the object to be plated is coated with triazine thiols, organic phosphoric acid or organic carboxylic acid.
- This is a surface treatment for precipitating an alkali or amine salt, and examples thereof include the surface treatment described in Japanese Patent No. 1840482.
- an electrochemical surface treatment (electroplating) method or an electroless plating method is used.
- the battery may be a battery in which the positive electrode resin contact surface and the negative electrode resin contact surface are subjected to a surface treatment with a silane coupling agent.
- the negative electrode seal length is longer than the positive electrode seal length. For this reason, the seal durability in both electrodes can be improved, and the balance between the seal durability between the negative electrode side resin member and the negative electrode terminal member and the seal durability on the positive electrode side can be appropriately taken.
- the surface treatment with a silane coupling agent is a technique for improving bonding (adhesion) with an organic material by disposing a silane coupling agent on the surface of an inorganic material such as metal.
- another aspect of the present invention is a vehicle on which any one of the above-described batteries is mounted and electric energy generated by the battery is used for all or part of a power source.
- the vehicle described above is equipped with any of the batteries described above, it can be a vehicle using a battery with good durability.
- the vehicle may be a vehicle that uses electric energy from a battery as a whole or a part of a power source.
- a vehicle that uses electric energy from a battery as a whole or a part of a power source.
- an electric vehicle a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair, an electric vehicle Examples include assist bicycles and electric scooters.
- another aspect of the present invention is a battery-equipped device in which any one of the above-described batteries is mounted and electric energy generated by the battery is used for all or a part of the energy source.
- the battery-equipped device described above is equipped with any of the above-described batteries, it can be a battery-equipped device that uses a battery with good durability.
- a battery mounting apparatus what is necessary is just an apparatus which mounts a battery and uses this for all or one part of an energy source, for example, a personal computer, a mobile telephone, a battery-powered electric tool, an uninterruptible power supply, etc. And various home appliances driven by batteries, office equipment, and industrial equipment.
- FIG. 2 is a perspective view of a battery according to Embodiment 1 and Modification 1.
- FIG. 3 is a cross-sectional view of a battery according to Embodiment 1 and Modification 1.
- FIG. 3 is an enlarged cross-sectional view (cross section AA in FIG. 2) of a battery according to Embodiment 1 and Modification 1.
- FIG. 3 is an enlarged cross-sectional view (cross section BB of FIG. 2) of the battery according to Embodiment 1 and Modification 1;
- It is explanatory drawing of experiment which confirms the sealing performance between a resin member and a terminal member.
- It is explanatory drawing of the experiment which confirms the sealing performance between a resin member and a terminal member (D section enlarged view of FIG. 5).
- FIG. 6 is an explanatory diagram of a battery manufacturing method according to Embodiment 1 and Modification 1.
- FIG. It is a graph which shows the relationship between the sealing performance between a resin member and a terminal member, and the square root of immersion time. It is explanatory drawing of the vehicle concerning Embodiment 2.
- FIG. It is explanatory drawing of the battery mounting apparatus concerning Embodiment 3.
- FIG. 1 is a perspective view of the battery 1
- FIG. 2 is a partially cutaway sectional view of the battery 1
- FIG. 3 is a partial sectional view of the battery 1 (cross section AA in FIG. 2)
- FIG. Cross-sectional views cross-section BB in FIG. 2) are respectively shown.
- the battery 1 according to the first embodiment includes a power generation element 80, a battery case 10, a positive terminal member 40 and a negative terminal member 50 that extend from the inside of the battery case 10 to the outside of the battery case 10, and an insulating resin.
- the battery 1 is a wound lithium ion secondary battery including a positive electrode side resin member 20 and a negative electrode side resin member 30 (see FIGS. 1 and 2).
- the battery 1 includes an electrolyte solution (not shown) obtained by adding a solute (LiPF 6 ) to a mixed organic solvent of ethylene carbonate (EC) and ethyl methyl carbonate (EMC).
- the power generation element 80 includes a belt-like positive electrode plate 81 and a negative electrode plate 82, and the positive electrode plate 81 and the negative electrode plate 82 are wound through a belt-like separator 83 made of polyethylene ( 1 and 2).
- the battery case 10 has a sealing lid 11 and a battery case body 12 both made of aluminum (see FIGS. 1 and 2).
- the battery case 10 houses the above-described power generation element 80 (see FIG. 2).
- the battery case main body 12 is a bottomed rectangular box shape having an opening 12A, and an insulating film (not shown) made of resin is pasted on the entire inner surface.
- the sealing lid 11 has a rectangular plate shape, and the opening 12A of the battery case body 12 is closed and welded to the battery case body 12.
- the sealing lid 11 has a positive electrode side through hole 11M through which the positive electrode terminal member 40 can be inserted and a negative electrode side through hole 11N through which the negative electrode terminal member 50 can be inserted (see FIGS. 2 to 4).
- this sealing lid 11 has the safety valve part 11S in the center of the left-right direction in FIG.
- the safety valve portion 11S is a one-way type safety valve that loses the function of the safety valve once the valve is opened.
- the positive electrode terminal member 40 is made of aluminum, is electrically connected to the positive electrode plate 81 of the power generation element 80, and extends from the battery case 10 to the outside of the battery case 10 (see FIG. 2).
- the positive terminal member 40 is disposed in the battery case 10, is located on one end side of the positive terminal member 40, and is connected to the positive electrode plate 81. The other end side of the positive terminal member 40.
- a positive terminal exposed portion 42 exposed outside the battery case 10. Further, it includes a positive electrode terminal penetration portion 43 that is located between the positive electrode terminal connection portion 41 and the positive electrode terminal exposure portion 42 and that penetrates the battery case 10 while being insulated from the battery case 10 (FIGS. 2 and 3). reference).
- the positive terminal exposed portion 42 is bent in a crank shape and is located above the flat plate first positive flat plate portion 42A and the positive first flat plate portion 42A parallel to the sealing lid 11 in FIG. It consists of a positive electrode second flat plate portion 42B and a positive electrode side connecting portion 42C that connects the positive electrode first flat plate portion 42A and the positive electrode second flat plate portion 42B (see FIG. 2).
- the positive first flat plate portion 42 ⁇ / b> A continues to the positive electrode terminal through portion 43.
- the positive electrode 2nd flat plate part 42B has penetrated the positive electrode side volt
- the positive terminal through-hole 43 has a crank part 43 ⁇ / b> X bent in a crank shape from the positive terminal exposed part 42 and toward the positive terminal connection part 41 from the crank part 43 ⁇ / b> X (FIG. 3).
- a flat plate extending portion 43Y extending in the middle and downward).
- the crank portion 43 ⁇ / b> X is covered in close contact with the positive electrode side resin member 20.
- the surface to which the positive electrode side resin member 20 is in close contact is referred to as a positive electrode resin contact surface 43XF (see FIGS. 2 and 3).
- an area including the positive electrode resin adhesion surface 43XF is subjected to organic plating for improving the adhesion between the crank portion 43X and the positive electrode side resin member 20.
- the negative electrode terminal member 50 is made of copper, is electrically connected to the negative electrode plate 82 of the power generation element 80, and extends from the battery case 10 to the outside of the battery case 10 (see FIG. 2).
- the negative electrode terminal member 50 is disposed in the battery case 10, is located on one end side of the negative electrode terminal member 50 and is connected to the negative electrode plate 82, and the other end side of the negative electrode terminal member 50.
- a negative electrode terminal exposed portion 52 exposed outside the battery case 10.
- the negative electrode terminal penetration part 53 which is located between these negative electrode terminal connection parts 51 and the negative electrode terminal exposure part 52 and is penetrated through this battery case 10 while being insulated from the battery case 10 is included (FIGS. 2 and 4). reference).
- the negative electrode terminal exposed portion 52 is bent in a crank shape, and is located above the flat plate-shaped negative electrode first flat plate portion 52A and negative electrode first flat plate portion 52A parallel to the sealing lid 11 in FIG. It consists of a negative electrode second flat plate portion 52B and a negative electrode side connecting portion 52C that connects the negative electrode first flat plate portion 52A and the negative electrode second flat plate portion 52B (see FIG. 2).
- the negative first flat plate portion 52 ⁇ / b> A continues to the negative electrode terminal penetration portion 53.
- the negative electrode 2nd flat plate part 52B has a negative electrode side bolt BT2 made of metal passing through the vicinity of the center thereof.
- the negative electrode terminal penetrating portion 53 has a crank portion 53 ⁇ / b> X bent in a crank shape from the negative electrode terminal exposed portion 52, and toward the negative electrode terminal connecting portion 51 from the crank portion 53 ⁇ / b> X (FIG. 4).
- a flat plate extending portion 53Y extending in the middle and downward).
- the crank portion 53 ⁇ / b> X is covered in close contact with the negative electrode side resin member 30.
- the surface to which the negative electrode side resin member 30 is in close contact is referred to as a negative electrode resin contact surface 53XF (see FIGS. 2 and 4).
- the organic plating which improves the adhesiveness of the crank part 53X and the negative electrode side resin member 30 is given also to the area
- FIG. 1 the organic plating which improves the adhesiveness of the crank part 53X and the negative electrode side resin member 30 is given also to the area
- the positive electrode side resin member 20 is made of an insulating resin polyphenyl sulfide resin (hereinafter also referred to as PPS).
- PPS insulating resin polyphenyl sulfide resin
- the positive electrode side resin member 20 is interposed between the positive electrode terminal member 40 and the battery case 10, insulates between the two and covers the positive electrode terminal member 40 while being in close contact with a part of the positive electrode terminal member 40 (FIG. 2). 3).
- the positive electrode side resin member 20 includes a positive electrode first flat plate portion 42 ⁇ / b> A of the positive electrode terminal exposed portion 42, a positive electrode side connecting portion 42 ⁇ / b> C, and a crank portion 43 ⁇ / b> X of the positive electrode terminal through portion 43 and the sealing lid 11.
- the positive electrode side resin member 20 covers the crank terminal 43 ⁇ / b> X of the positive electrode terminal penetrating portion 43 while being in close contact therewith. That is, the positive electrode side resin member 20 seals the positive electrode resin contact surface 43XF of the crank portion 43X.
- the shortest path is a positive electrode seal path R1 indicated by an arrow in FIGS.
- the positive electrode seal length L1 of the positive electrode seal path R1 is 4.4 mm (see FIG. 3). Since the positive electrode seal path R1 is along the positive electrode resin contact surface 43XF of the crank portion 43X bent in a crank shape, the thickness of the positive electrode resin member 20 in the vertical direction in FIG. 3 can be made smaller than the positive electrode seal length L1. it can. That is, in the positive electrode terminal member 40 of the battery 1 according to the first embodiment, the positive electrode seal length L1 larger than the thickness of the positive electrode resin member 20 in the vertical direction in FIG. 3 can be secured.
- the negative electrode side resin member 30 is interposed between the negative electrode terminal member 50 and the battery case 10 in the same manner as the positive electrode side made of an insulating resin (PPS), and insulates between them, and a part of the negative electrode terminal member 50 This is covered while adhering to the periphery of (see FIGS. 2 and 4).
- the negative electrode side resin member 30 includes a negative electrode first flat plate portion 52 ⁇ / b> A of the negative electrode terminal exposed portion 52, a negative electrode side connecting portion 52 ⁇ / b> C, and a crank portion 53 ⁇ / b> X of the negative electrode terminal through portion 53 and the sealing lid 11. (See FIG. 2).
- the negative electrode side resin member 30 covers the periphery of the crank portion 53X of the negative electrode terminal penetration portion 53 while being in close contact therewith. That is, the negative electrode side resin member 30 seals the negative electrode resin contact surface 53XF of the crank portion 53X.
- the shortest path is a negative electrode seal path R2 indicated by an arrow in FIGS.
- route R2 is 13.2 mm (refer FIG. 4). Since this negative electrode seal path R2 is along the negative electrode resin adhesion surface 53XF of the crank portion 53X bent in a crank shape, the thickness of the negative electrode resin member 30 in the vertical direction in FIG. 4 can be made smaller than the negative electrode seal length L2. it can. That is, in the negative electrode terminal member 50 of the battery 1 according to the first embodiment, the negative electrode seal length L2 larger than the thickness of the negative electrode resin member 30 in the vertical direction in FIG. 4 can be ensured.
- the present inventors conducted the following experiment in order to confirm the sealing performance between the positive electrode side resin member 20 and the positive electrode terminal member 40 and between the negative electrode side resin member 30 and the negative electrode terminal member 50. Carried out. Specifically, as shown in FIG. 5, in the shape of a rectangular plate, like the positive electrode terminal member 40, the metal plate T ⁇ b> 40 is made of copper and the surface thereof is subjected to organic plating, and the metal plate T ⁇ b> 40 is in close contact with the metal plate T ⁇ b> 40. A first sample TP1 made of the same PPS resin member T20 as the positive electrode side resin member 20 was prepared.
- one of the metal plates T40 penetrating the resin member T20 of the first sample TP1 is immersed in the same electrolytic solution (not shown) as that of the battery 1, and the metal plate T40 and the resin member T20 as a result of the immersion time.
- the change in the peel-off length of the seal was measured.
- the resin member T20 is peeled off from the metal plate T40, and elemental analysis is performed on a portion of the metal plate T40 where the resin member T20 is in close contact before immersion ( EPMA) was conducted, and it was examined whether or not the components of the electrolytic solution (phosphorus element or fluorine element) were present.
- the component of the electrolytic solution When the component of the electrolytic solution is present in a part of the portion where the resin member T20 is in close contact before the immersion, it is considered that the resin member T20 is peeled off during the immersion and the electrolytic solution has entered there.
- the part (region) where the components of the electrolytic solution exist is shown by hatching in FIG.
- the longest distance among the distances peeled in the same direction as the direction in which the metal plate T40 extends was used as the peeling length of the seal.
- a second metal sample T50 made of a flat metal plate T50 made of aluminum and subjected to organic plating on the surface and a resin member T30 made of the same PPS as the negative electrode side resin member 30 is prepared. In the same manner as in the first sample TP1, the change in the peeling length of the seal between the metal plate T50 and the resin member T30 with the lapse of the immersion time was measured.
- the negative electrode seal length L2 in the negative electrode terminal member 50 of the battery 1 according to the first embodiment is longer than the positive electrode seal length L1 (4.4 mm) in the positive electrode terminal member 40 (L2> L1) ( 12.3 mm).
- the positive electrode seal length L1 and the negative electrode seal length L2 are values determined in consideration of the balance between the positive electrode side and negative electrode side seal durability.
- the sealing durability between the negative electrode side resin member 30 and the negative electrode terminal member 50 in the battery 1 and the sealing durability between the positive electrode side resin member 20 and the positive electrode terminal member 40 are set to the same level, and the balance between the two. Can take.
- the battery 1 having good durability can be obtained by suppressing problems such as leakage of the electrolytic solution accompanying a decrease in the sealing performance between the negative electrode side resin member 30 and the negative electrode terminal member 50.
- the positive electrode resin contact surface 43XF and the negative electrode resin contact surface 53XF are subjected to organic plating.
- the negative electrode seal length L2 is longer than the positive electrode seal length L1. For this reason, the seal durability at both electrodes (positive electrode side and negative electrode side) can be improved, and the balance between the seal durability between the negative electrode side resin member 30 and the negative electrode terminal member 50 and the seal durability at the positive electrode side is achieved. Can be taken appropriately.
- organic plating is applied in advance to the region of the positive electrode terminal member 40 that becomes the positive electrode resin adhesion surface 43XF and the region of the negative electrode terminal member 50 that becomes the negative electrode resin adhesion surface 53XF.
- organic plating an organic solution in which a monosodium salt of triazine trithione (not shown) and 2-methylaminomethylphenol were dissolved in an organic solvent (the concentration of the organic solution was 5% by weight) was used.
- the positive electrode terminal member 40 (or negative electrode terminal member 50) was immersed in this organic solution adjusted to 55 ° C. for 1 minute, and organic plating was applied to the surface of the positive electrode terminal member 40 (or negative electrode terminal member 50).
- the positive side bolt BT1 is inserted into the positive electrode second flat plate portion 42B of the positive electrode terminal member 40, and the negative electrode side bolt BT2 is inserted into the negative electrode second flat plate portion 52B of the negative electrode terminal member 50, respectively. Further, the positive terminal through part 43 of the positive terminal member 40 is inserted into the positive side through hole 11M of the sealing lid 11, and the negative terminal through part 53 of the negative terminal member 50 is inserted into the negative side through hole 11N (FIG. 8). (See the above figure). Next, the positive electrode side resin member 20 and the negative electrode side resin member 30 are each formed by one injection molding.
- the positive electrode terminal member 40, the positive electrode side bolt BT1, and the sealing lid 11 are integrated by the positive electrode side resin member 20, the positive electrode terminal member 40 is fixed while penetrating the sealing lid 11 (see the lower diagram of FIG. 8). Further, since the negative electrode terminal member 50, the negative electrode side bolt BT2, and the sealing lid 11 are integrated by the negative electrode side resin member 30, the negative electrode terminal member 50 is fixed while penetrating the sealing lid 11.
- the positive electrode side resin member 20 is in close contact with the positive electrode first flat plate portion 42A of the positive electrode terminal exposed portion 42, the positive electrode side connecting portion 42C, and the crank portion 43X of the positive electrode terminal through portion 43. Moreover, the positive electrode side resin member 20 covers the periphery of the crank portion 43 ⁇ / b> X of the positive electrode terminal penetration portion 43 while being in close contact therewith. That is, the positive electrode side resin member 20 is in close contact with the region of the positive electrode terminal member 40 that becomes the positive electrode resin adhesion surface 43XF.
- the negative electrode side resin member 30 is in close contact with the negative electrode first flat plate portion 52A of the negative electrode terminal exposed portion 52, the negative electrode side connecting portion 52C, and the crank portion 53X of the negative electrode terminal through portion 53.
- the negative electrode side resin member 30 covers the periphery of the crank portion 53X of the negative electrode terminal penetration portion 53 while being in close contact therewith. In other words, the negative electrode side resin member 30 is in close contact with the region of the negative electrode terminal member 50 that becomes the negative electrode resin adhesion surface 53XF.
- the positive electrode terminal connection portion 41 of the positive electrode terminal member 40 described above is used as the positive electrode plate 81 of the power generation element 80 and the negative electrode of the negative electrode terminal member 50 is used.
- the terminal connection portions 51 are welded to the negative electrode plate 82, respectively.
- the power generation element 80 is accommodated in the battery case body 12. Further, the sealing lid 11 and the battery case body 12 are welded to form a battery case 10.
- An electrolyte (not shown) is injected into the battery case 10 to complete the battery 1 according to the first embodiment (see FIG. 1).
- the battery 101 according to the first modification includes a power generation element 80, a battery case 10, a positive terminal member 140 and a negative terminal member 150 that extend from the inside of the battery case 10 to the outside of the battery case 10, and an insulating resin.
- 1 is a wound lithium ion secondary battery including a positive electrode side resin member 120 and a negative electrode side resin member 130 (see FIGS. 1 and 2). Further, the battery 101 includes an electrolyte solution (not shown) similar to that of the first embodiment.
- the positive electrode terminal member 140 is coated with a silane coupling agent that improves the adhesion between the crank portion 143X and the positive electrode side resin member 120 in the region including the positive electrode resin adhesion surface 143XF.
- the negative electrode terminal member 150 is coated with a silane coupling agent that improves the adhesion between the crank portion 153X and the negative electrode side resin member 130 in a region including the negative electrode resin adhesion surface 153XF.
- the positive-side resin member 120 made of PPS is interposed between the positive terminal member 140 and the battery case 10 to insulate between the two and cover the portion while adhering to the periphery of a part of the positive terminal member 140.
- the positive electrode side resin member 120 includes a positive electrode first flat plate portion 142A of the positive electrode terminal exposed portion 142, a positive electrode side connecting portion 142C, and a crank portion 143X of the positive electrode terminal through portion 143 and the sealing lid 11. (See FIG. 2).
- the positive electrode side resin member 120 covers the crank terminal 143 ⁇ / b> X of the positive electrode terminal penetrating part 143 while being in close contact therewith. That is, the positive electrode side resin member 120 seals the positive electrode resin contact surface 143XF of the crank portion 143X.
- the shortest path is a positive electrode sealing path R3 indicated by an arrow in FIGS.
- the positive electrode seal length L3 of the positive electrode seal path R3 is 6.3 mm (see FIG. 3).
- the negative electrode side resin member 130 is interposed between the negative electrode terminal member 150 and the battery case 10, insulates between the two, and is in close contact with a part of the negative electrode terminal member 150. (See FIGS. 2 and 4). Specifically, the negative electrode side resin member 130 is between the negative electrode first flat plate portion 152A of the negative electrode terminal exposed portion 152, the negative electrode side connecting portion 152C, the crank portion 153X of the negative electrode terminal through portion 153, and the sealing lid 11. (See FIG. 2). Further, the negative electrode side resin member 130 covers the crank terminal 153X of the negative electrode terminal penetrating portion 153 in close contact with the crank portion 153X. That is, the negative electrode side resin member 130 seals the negative electrode resin contact surface 153XF of the crank portion 153X.
- the shortest path is a negative electrode seal path R4 indicated by an arrow in FIGS.
- route R4 is 7.0 mm (refer FIG. 4).
- the present inventors are the same as in the first embodiment.
- the experiment was conducted. Specifically, as shown in FIG. 5, like the positive electrode terminal member 140, it has a rectangular plate shape, is made of copper, and has a metal plate T140 coated with a silane coupling agent on the surface, and around the metal plate T140.
- one of the metal plates T140 penetrating the resin member T120 of the third sample TP3 is immersed in an electrolyte solution (not shown) similar to that of the battery 101, and the metal plate T140 and the resin member T120 according to the passage of the immersion time.
- the change in the peel-off length of the seal was measured.
- a fourth sample TP4 made of a metal plate T150 made of aluminum and coated with a silane coupling agent on the surface and a resin member T130 made of the same PPS as the negative electrode side resin member 130 is prepared.
- the change in the peeling length of the seal between the metal plate T150 and the resin member T130 with the passage of the immersion time was measured.
- the seal between the negative electrode side resin member 130 and the negative electrode terminal member 150 simulated by the fourth sample TP4 is the seal between the positive electrode side resin member 120 and the positive electrode terminal member 140 simulated by the third sample TP3. It can be seen that its performance decreases sooner. That is, it can be seen that the sealing durability between the negative electrode side resin member 130 and the negative electrode terminal member 150 is lower than the sealing durability between the positive electrode side resin member 120 and the positive electrode terminal member 140.
- the negative electrode seal length L4 in the negative electrode terminal member 150 of the battery 101 according to the first modification is longer than the positive electrode seal length L3 (6.3 mm) in the positive electrode terminal member 140 (L4> L3) ( 7.0 mm).
- the positive electrode seal length L3 and the negative electrode seal length L4 are numerical values determined in consideration of the balance between the positive electrode side and negative electrode side seal durability.
- the positive electrode resin adhesion surface 143XF and the negative electrode resin adhesion surface 153XF are subjected to surface treatment with a silane coupling agent.
- the negative electrode seal length L4 is longer than the positive electrode seal length L3. For this reason, the seal durability at both electrodes can be improved, and the balance between the seal durability between the negative electrode side resin member 130 and the negative electrode terminal member 150 and the seal durability at the positive electrode side can be appropriately taken. .
- organic plating is performed on the region that becomes the positive electrode resin contact surface 143XF in the positive electrode terminal member 140 and the region that becomes the negative electrode resin contact surface 153XF in the negative electrode terminal member 150. It differs from the manufacturing method of the battery 1 of Embodiment 1 by the point which apply
- a vehicle 200 according to the second embodiment is equipped with a battery pack 210 including a plurality of the batteries 1 and 101 described above.
- vehicle 200 is a hybrid vehicle that is driven by using engine 240, front motor 220, and rear motor 230 in combination.
- the vehicle 200 includes a vehicle body 290, an engine 240, a front motor 220, a rear motor 230, a cable 250, an inverter 260, and a battery pack 210 having a rectangular box shape.
- the battery pack 210 accommodates a plurality of the batteries 1 and 101 according to the first embodiment or the first modification described above in the rectangular battery case 211.
- the vehicle 200 of the second embodiment since any one of the above-described batteries 1 and 101 is mounted, the vehicle 200 using the batteries 1 and 101 having good durability can be obtained.
- the hammer drill 300 is equipped with the battery pack 310 including the batteries 1 and 101 described above, and is a battery-equipped device having the battery pack 310 and the main body 320 as shown in FIG. . Note that the battery pack 310 is accommodated in the bottom portion 321 of the main body 320 of the hammer drill 300.
- the present invention has been described with reference to the first to third embodiments and the first modified embodiment, but the present invention is not limited to the above-described embodiments, and can be appropriately modified and applied without departing from the gist thereof. Needless to say, you can.
- the positive side resin member and the negative side resin member are both formed by one injection molding. However, for example, these may be composed of two or more resin members, respectively. .
- the positive electrode terminal exposed portions 42 and 142 and the negative electrode terminal exposed portions 52 and 152 that are bent in a crank shape are illustrated, but the shape is not limited, and for example, the positive electrode terminal through portions 43 and 143 It is good also as a rectangular-plate-shaped positive electrode terminal exposed part (negative electrode terminal exposed part) extended toward the upper direction in FIG. 2 from (negative electrode terminal penetration part 53,153).
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
このような電池の中には、電池内部の発電要素と導通しつつ電池ケースの外側にまで延出された2つの電極端子部材(正極端子部材及び負極端子部材)を備えるものがある。
例えば、特許文献1では、金属からなる板状の蓋体と、この蓋体に形成された2つの貫通孔にそれぞれ挿通される2つの電極端子(正極端子部材及び負極端子部材)と、これら蓋体と各電極端子との間にインサート成形され、蓋体と電極端子とを絶縁すると共に、これらを一体的に固定する2つの絶縁密閉部材(正極側樹脂部材及び負極側樹脂部材)とを有する、リチウム電池の上蓋が開示されている。この上蓋の2つの電極端子及び2つの絶縁密閉部材はいずれも、正極側及び負極側とも同じ形状をなしている。
即ち、正極側樹脂部材と負極側樹脂部材、及び、正極端子部材と負極端子部材とがそれぞれ同じ形状である特許文献1の電池は、正極側と負極側とのシール性能(シール耐久性)のバランスが悪い。このため、この電池では、正極側のシール性は未だ十分な特性を有しているのに、先に生じる負極側におけるシール性の低下に伴って、電解液の液漏れ等の不具合が生じてしまう虞がある。
これに対し、上述の電池では、負極側樹脂部材と負極端子部材との間の負極シール長(上述)を、正極シール長(上述)よりも相対的に長くしているので、現実の負極側樹脂部材と負極端子部材との間におけるシール耐久性及び、正極側樹脂部材と正極端子部材との間におけるシール耐久性を同程度とし、両者のバランスを取ることができる。
かくして、負極側のシール性の低下に伴う、電解液の液漏れ等の不具合を抑制して、耐久性の良好な電池とすることができる。
但し、本発明者らの研究により、正極樹脂密着面及び負極樹脂密着面に有機めっきによる表面処理を施した正極端子部材及び負極端子部材を用いた電池では、負極端子部材におけるシール性が、正極側に比して低下しやすい。
これに対し、上述の電池では、正極樹脂密着面及び負極樹脂密着面には有機めっきが施されてなる。その上、負極シール長を正極シール長よりも長くしている。このため、両極におけるシール耐久性を向上させることができる上、負極側樹脂部材と負極端子部材との間におけるシール耐久性及び、正極側におけるシール耐久性のバランスを適切に取ることができる。
但し、本発明者らの研究により、正極樹脂密着面及び負極樹脂密着面にシランカップリング剤による表面処理を施した正極端子部材及び負極端子部材を用いた電池では、負極端子部材におけるシール性が、正極側に比して低下しやすい。
これに対し、上述の電池では、正極樹脂密着面及び負極樹脂密着面にはシランカップリング剤による表面処理が施されてなる。その上、負極シール長を正極シール長よりも長くしている。このため、両極におけるシール耐久性を向上させることができる上、負極側樹脂部材と負極端子部材との間におけるシール耐久性及び、正極側におけるシール耐久性のバランスを適切に取ることができる。
10 電池ケース
20,120 正極側樹脂部材
30,130 負極側樹脂部材
40,140 正極端子部材
43XF,143XF 正極樹脂密着面
50,150 負極端子部材
53XF,153XF 負極樹脂密着面
80 発電要素
81 正電極板
82 負電極板
200 車両
300 ハンマードリル(電池搭載機器)
L1,L3 正極シール長
L2,L4 負極シール長
R1,R3 正極シール経路((正極シール経路のうちの)最短の経路)
R2,R4 負極シール経路((負極シール経路のうちの)最短の経路)
次に、本発明の実施形態1について、図面を参照しつつ説明する。
まず、本実施形態1にかかる電池1について説明する。図1に電池1の斜視図を、図2にその電池1の部分破断断面図を、図3に電池1の部分断面図(図2のA-A断面)を、図4に電池1の部分断面図(図2のB-B断面)を、それぞれ示す。
本実施形態1にかかる電池1は、発電要素80と、電池ケース10と、この電池ケース10内から電池ケース10外にまで延出してなる正極端子部材40及び負極端子部材50と、絶縁性樹脂からなる正極側樹脂部材20及び負極側樹脂部材30とを備える捲回形のリチウムイオン二次電池である(図1,2参照)。また、電池1は、これらのほか、エチレンカーボネート(EC)とエチルメチルカーボネート(EMC)との混合有機溶媒に溶質(LiPF6)を添加してなる電解液(図示しない)を備える。
なお、正極端子部材40の表面のうち、この正極樹脂密着面43XFを含む領域には、クランク部43Xと正極側樹脂部材20との密着性を向上させる有機めっきが施されている。
なお、負極端子部材50の表面のうち、この負極樹脂密着面53XFを含む領域にも、クランク部53Xと負極側樹脂部材30との密着性を向上させる有機めっきが施されている。
具体的には、正極側樹脂部材20は、正極端子露出部42の正極第1平板部42A、正極側連結部42C、及び、正極端子貫通部43のクランク部43Xと、封口蓋11との間に介在している(図2参照)。また、正極側樹脂部材20は、正極端子貫通部43のクランク部43Xの周囲に密着しつつこれを覆っている。つまり、正極側樹脂部材20は、クランク部43Xの正極樹脂密着面43XFをシールしている。
この正極シール経路R1は、クランク状に屈曲したクランク部43Xの正極樹脂密着面43XFに沿うので、正極樹脂部材20の、図3中、上下方向の厚みを正極シール長L1よりも小さくすることができる。即ち、本実施形態1にかかる電池1の正極端子部材40では、正極樹脂部材20の、図3中、上下方向の厚みよりも大きな正極シール長L1を確保することができる。
具体的には、負極側樹脂部材30は、負極端子露出部52の負極第1平板部52A、負極側連結部52C、及び、負極端子貫通部53のクランク部53Xと、封口蓋11との間に介在している(図2参照)。また、負極側樹脂部材30は、負極端子貫通部53のクランク部53Xの周囲に密着しつつこれを覆っている。つまり、負極側樹脂部材30は、クランク部53Xの負極樹脂密着面53XFをシールしている。
この負極シール経路R2は、クランク状に屈曲したクランク部53Xの負極樹脂密着面53XFに沿うので、負極樹脂部材30の、図4中、上下方向の厚みを負極シール長L2よりも小さくすることができる。即ち、本実施形態1にかかる電池1の負極端子部材50では、負極樹脂部材30の、図4中、上下方向の厚みよりも大きな負極シール長L2を確保することができる。
具体的には、図5に示すように、矩形板状で、正極端子部材40と同様、銅からなり、表面に有機めっきを施した金属板T40、及び、この金属板T40の周囲に密着しつつこれを覆う、正極側樹脂部材20と同じPPSの樹脂部材T20からなる第1試料TP1を用意した。そして、この第1試料TP1の、樹脂部材T20を貫通する金属板T40の一方を、電池1と同様の電解液(図示しない)に浸漬して、浸漬時間の経過による金属板T40と樹脂部材T20との間のシールの剥がれ長の変化を測定した。具体的には、電解液から引き上げた第1試料TP1について、金属板T40から樹脂部材T20を剥がし取り、この金属板T40のうち、浸漬前に樹脂部材T20が密着していた部位について元素分析(EPMA)を行い、そこに電解液の成分(リン元素やフッ素元素)が存在するか否かを調べた。浸漬前に樹脂部材T20が密着していた部位の一部に電解液の成分が存在する場合、浸漬している間にそこで樹脂部材T20が剥がれ、そこに電解液が侵入したものと考えられる。電解液の成分が存在した部位(領域)について、図6に網掛けのハッチングを付して示す。なお、シールの剥がれ長には、図6に示すように、金属板T40が伸びる方向と同方向に剥がれている距離のうち、最長の距離を用いた。
一方、負極端子部材50と同様、アルミニウムからなり、表面を有機めっきしてなる平板状の金属板T50、及び、負極側樹脂部材30と同じPPSからなる樹脂部材T30からなる第2試料TP2を用意し、第1試料TP1と同様にして、浸漬時間の経過による金属板T50と樹脂部材T30との間のシールの剥がれ長の変化を測定した。
第1試料TP1及び第2試料TP2の剥がれ長は、いずれも浸漬時間の経過と共に直線的に増加している。また、第2試料TP2を示すグラフが、第1試料TP1のグラフよりも常に上に位置している。このことから、第2試料TP2が模擬する負極側樹脂部材30と負極端子部材50との間のシールは、第1試料TP1が模擬する正極側樹脂部材20と正極端子部材40との間のシールよりも早くその性能が低下することが判る。つまり、負極側樹脂部材30と負極端子部材50との間のシール耐久性が、正極側樹脂部材20と正極端子部材40との間のシール耐久性よりも低いことが判る。
かくして、負極側樹脂部材30と負極端子部材50との間のシール性の低下に伴う、電解液の液漏れ等の不具合を抑制して、耐久性の良好な電池1とすることができる。
次いで、正極側樹脂部材20及び負極側樹脂部材30をそれぞれ1回の射出成形により形成する。この正極側樹脂部材20により、正極端子部材40、正極側ボルトBT1及び封口蓋11が一体となるため、正極端子部材40は封口蓋11を貫通しつつ固定される(図8の下図参照)。また、負極側樹脂部材30により、負極端子部材50、負極側ボルトBT2及び封口蓋11が一体となるため、負極端子部材50は封口蓋11を貫通しつつ固定される。
また、負極側樹脂部材30は、負極端子露出部52の負極第1平板部52A、負極側連結部52C、及び、負極端子貫通部53のクランク部53Xと密着する。また、負極側樹脂部材30は、負極端子貫通部53のクランク部53Xの周囲に密着しつつこれを覆う。つまり、負極側樹脂部材30は、負極端子部材50のうち負極樹脂密着面53XFとなる領域に密着している。
次に、本発明の変形形態1にかかる電池101について、図1~6,8,9を参照しつつ説明する。
本変形形態1の電池101では、正極端子部材の正極樹脂密着面、及び、負極端子部材の負極樹脂密着面に、シランカップリング剤による表面処理が施されている点が前述の実施形態1と異なり、それ以外は同様である。
そこで、実施形態1と異なる点を中心に説明し、同様の部分の説明は省略または簡略化する。なお、同様の部分については同様の作用効果を生じる。また、同内容のものには同番号を付して説明する。
具体的には、正極側樹脂部材120は、正極端子露出部142の正極第1平板部142A、正極側連結部142C、及び、正極端子貫通部143のクランク部143Xと、封口蓋11との間に介在している(図2参照)。また、正極側樹脂部材120は、正極端子貫通部143のクランク部143Xの周囲に密着しつつこれを覆っている。つまり、正極側樹脂部材120は、クランク部143Xの正極樹脂密着面143XFをシールしている。
具体的には、負極側樹脂部材130は、負極端子露出部152の負極第1平板部152A、負極側連結部152C、及び、負極端子貫通部153のクランク部153Xと、封口蓋11との間に介在している(図2参照)。また、負極側樹脂部材130は、負極端子貫通部153のクランク部153Xの周囲に密着しつつこれを覆っている。つまり、負極側樹脂部材130は、クランク部153Xの負極樹脂密着面153XFをシールしている。
具体的には、図5に示すように、矩形板状で、正極端子部材140と同様、銅からなり、表面にシランカップリング剤を塗布した金属板T140、及び、この金属板T140の周囲に密着しつつこれを覆う、正極側樹脂部材120と同じPPSの樹脂部材T120からなる第3試料TP3を用意した。そして、この第3試料TP3の、樹脂部材T120を貫通する金属板T140の一方を、電池101と同様の電解液(図示しない)に浸漬して、浸漬時間の経過による金属板T140と樹脂部材T120との間のシールの剥がれ長の変化を測定した。
一方、負極端子部材150と同様、アルミニウムからなり、表面にシランカップリング剤を塗布した金属板T150、及び、負極側樹脂部材130と同じPPSからなる樹脂部材T130からなる第4試料TP4を用意し、第3試料TP3と同様にして、浸漬時間の経過による金属板T150と樹脂部材T130との間のシールの剥がれ長の変化を測定した。
第3試料TP3及び第4試料TP4の剥がれ長は、いずれも浸漬時間の平方根の値が増えると共に直線的に増加している。また、第4試料TP4を示すグラフが、第3試料TP3のグラフよりも常に上に位置している。このことから、第4試料TP4が模擬する負極側樹脂部材130と負極端子部材150との間のシールは、第3試料TP3が模擬する正極側樹脂部材120と正極端子部材140との間のシールよりも早くその性能が低下することが判る。つまり、負極側樹脂部材130と負極端子部材150との間のシール耐久性が、正極側樹脂部材120と正極端子部材140との間のシール耐久性よりも低いことが判る。
このシランカップリング剤の塗布については、具体的には、ビスシラン化合物を含むシランカップリング剤の中に、正極端子部材140及び負極端子部材150をそれぞれ所定時間浸漬して、その後乾燥させる。
本実施形態2にかかる車両200は、前述した電池1,101を複数含むバッテリパック210を搭載したものである。具体的には、図10に示すように、車両200は、エンジン240、フロントモータ220及びリアモータ230を併用して駆動するハイブリッド自動車である。この車両200は、車体290、エンジン240、これに取り付けられたフロントモータ220、リアモータ230、ケーブル250、インバータ260、及び、矩形箱形状のバッテリパック210を有している。このうちバッテリパック210は、前述した実施形態1或いは変形形態1にかかる電池1,101を複数、矩形箱形状のバッテリケース211の内部に収容してなる。
また、本実施形態3のハンマードリル300は、前述した電池1,101を含むバッテリパック310を搭載したものであり、図11に示すように、バッテリパック310、本体320を有する電池搭載機器である。なお、バッテリパック310はハンマードリル300の本体320のうち底部321に可能に収容されている。
例えば、実施形態1等では、正極側樹脂部材及び負極側樹脂部材をいずれも一回の射出成形で形成したものを例示したが、例えば、これらをそれぞれ2以上の樹脂部材からなるものとしても良い。また、実施形態1等では、クランク状に屈曲してなる正極端子露出部42,142及び負極端子露出部52,152を例示したが、形状に限定はなく、例えば、正極端子貫通部43,143(負極端子貫通部53,153)から、図2中、上方に向けて延出する矩形板状の正極端子露出部(負極端子露出部)としても良い。
Claims (5)
- 正電極板及び負電極板を含む発電要素と、
上記発電要素を収容してなる電池ケースと、
アルミニウムからなり、上記正電極板と導通し、上記電池ケース内から上記電池ケース外にまで延出してなる正極端子部材と、
銅からなり、上記負電極板と導通し、上記電池ケース内から上記電池ケース外にまで延出してなる負極端子部材と、
絶縁性樹脂からなり、上記正極端子部材と上記電池ケースとの間に介在し、両者間を絶縁すると共に、上記正極端子部材の一部の周囲に密着しつつこれを覆う正極側樹脂部材と、
絶縁性樹脂からなり、上記負極端子部材と上記電池ケースとの間に介在し、両者間を絶縁すると共に、上記負極端子部材の一部の周囲に密着しつつこれを覆う負極側樹脂部材と、を備える
電池であって、
上記正極端子部材のうち上記正極側樹脂部材が密着している正極樹脂密着面、及び、上記負極端子部材のうち上記負極側樹脂部材が密着している負極樹脂密着面には、いずれも上記正極側樹脂部材及び上記負極側樹脂部材との密着性を向上させる表面処理が施されてなり、
上記負極樹脂密着面上を、上記電池ケース内から上記電池ケース外に至る負極シール経路のうち、最短の経路の長さである負極シール長が、
上記正極樹脂密着面上を、上記電池ケース内から上記電池ケース外に至る正極シール経路のうち、最短の経路の長さである正極シール長よりも長い形態とされてなる
電池。 - 請求項1に記載の電池であって、
前記正極樹脂密着面及び前記負極樹脂密着面には、有機めっきが施されてなる
電池。 - 請求項1に記載の電池であって、
前記正極樹脂密着面及び負極樹脂密着面には、シランカップリング剤による表面処理が施されてなる
電池。 - 請求項1~請求項3のいずれか1項に記載の電池を搭載し、この電池による電気エネルギを動力源の全部又は一部に使用する車両。
- 請求項1~請求項3のいずれか1項に記載の電池を搭載し、この電池による電気エネルギをエネルギ源の全部又は一部に使用する電池搭載機器。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010544104A JP5273160B2 (ja) | 2009-08-28 | 2009-08-28 | 電池、車両及び電池搭載機器 |
CN200980161146.1A CN102484237B (zh) | 2009-08-28 | 2009-08-28 | 电池、车辆及电池装载设备 |
KR1020127002383A KR101242316B1 (ko) | 2009-08-28 | 2009-08-28 | 전지, 차량 및 전지 탑재 기기 |
PCT/JP2009/065032 WO2011024286A1 (ja) | 2009-08-28 | 2009-08-28 | 電池、車両及び電池搭載機器 |
US13/392,170 US8748035B2 (en) | 2009-08-28 | 2009-08-28 | Battery, vehicle, and battery-mounting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2009/065032 WO2011024286A1 (ja) | 2009-08-28 | 2009-08-28 | 電池、車両及び電池搭載機器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011024286A1 true WO2011024286A1 (ja) | 2011-03-03 |
Family
ID=43627412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/065032 WO2011024286A1 (ja) | 2009-08-28 | 2009-08-28 | 電池、車両及び電池搭載機器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8748035B2 (ja) |
JP (1) | JP5273160B2 (ja) |
KR (1) | KR101242316B1 (ja) |
CN (1) | CN102484237B (ja) |
WO (1) | WO2011024286A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012160681A1 (ja) * | 2011-05-25 | 2012-11-29 | トヨタ自動車株式会社 | 電池 |
JP2013187175A (ja) * | 2012-03-12 | 2013-09-19 | Kojima Press Industry Co Ltd | 端子接続構造 |
WO2013147372A1 (en) * | 2012-03-26 | 2013-10-03 | Shin Heung Energy & Electronic Co.,Ltd. | Highly heat-resistantfilm for electrode terminals, method for producing the heat-resistant film and electrode terminal structure including the heat-resistant film |
US9985269B2 (en) | 2012-03-26 | 2018-05-29 | Shin Heung Energy & Electronic Co., Ltd. | Highly heat-resistant film for electrode terminals |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20140101228A (ko) * | 2013-02-08 | 2014-08-19 | 삼성에스디아이 주식회사 | 전지 모듈 |
KR101741028B1 (ko) | 2013-04-08 | 2017-05-29 | 삼성에스디아이 주식회사 | 전지 유니트 및 이를 채용한 전지 모듈 |
KR101688482B1 (ko) * | 2013-04-08 | 2016-12-21 | 삼성에스디아이 주식회사 | 전지 유니트 및 이를 채용한 전지 모듈 |
KR101688481B1 (ko) * | 2013-04-08 | 2016-12-21 | 삼성에스디아이 주식회사 | 전지 유니트 및 이를 채용한 전지 모듈 |
JP6086240B2 (ja) * | 2013-08-23 | 2017-03-01 | トヨタ自動車株式会社 | 非水電解液電池およびその製造方法 |
US10091902B2 (en) * | 2015-11-23 | 2018-10-02 | Te Connectivity Corporation | Electrical module for battery distribution assembly |
US10622160B2 (en) * | 2017-03-06 | 2020-04-14 | Avx Corporation | Solid electrolytic capacitor assembly |
KR102337491B1 (ko) * | 2017-03-06 | 2021-12-09 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20220087167A (ko) * | 2020-12-17 | 2022-06-24 | 삼성에스디아이 주식회사 | 전극 조립체 및 전극 조립체를 구비한 이차전지 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001059181A (ja) * | 1999-08-20 | 2001-03-06 | Dainippon Printing Co Ltd | 表面処理された金属箔 |
JP2001216951A (ja) * | 2000-02-02 | 2001-08-10 | Yuasa Corp | 密閉電池 |
JP2009037817A (ja) * | 2007-08-01 | 2009-02-19 | Toyota Motor Corp | 電池 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4934306A (en) * | 1987-10-15 | 1990-06-19 | Wilson Greatbatch Ltd. | Anode coating for lithium cell |
JPH0551671A (ja) | 1991-08-21 | 1993-03-02 | Nikko Kyodo Co Ltd | 曲げ性及び応力緩和特性に優る電子機器用高力高導電性銅合金 |
US6592738B2 (en) * | 1997-01-31 | 2003-07-15 | Elisha Holding Llc | Electrolytic process for treating a conductive surface and products formed thereby |
JP3823189B2 (ja) | 2000-01-18 | 2006-09-20 | 株式会社東亜電化 | 金属表面皮膜の反応性保持方法 |
JP2006222185A (ja) | 2005-02-09 | 2006-08-24 | Furukawa Circuit Foil Kk | ポリイミド系フレキシブル銅張積層板用銅箔、ポリイミド系フレキシブル銅張積層板、及びポリイミド系フレキシブルプリント配線板 |
CN1655389A (zh) * | 2005-03-04 | 2005-08-17 | 北京中信国安盟固利新材料技术研究院有限公司 | 大容量金属外壳锂离子二次电池 |
JP2007179793A (ja) | 2005-12-27 | 2007-07-12 | Denso Corp | 密閉型電池用蓋体 |
JP5182838B2 (ja) | 2006-07-25 | 2013-04-17 | 株式会社デンソー | リチウム電池容器用封口板,その製造方法およびリチウム電池 |
JP2008103268A (ja) | 2006-10-20 | 2008-05-01 | Toyota Motor Corp | 組電池及び車両 |
JP4776515B2 (ja) | 2006-12-11 | 2011-09-21 | 株式会社東亜電化 | 密着層 |
WO2010095224A1 (ja) | 2009-02-18 | 2010-08-26 | トヨタ自動車株式会社 | 電池、車両及び電池使用機器 |
-
2009
- 2009-08-28 JP JP2010544104A patent/JP5273160B2/ja active Active
- 2009-08-28 CN CN200980161146.1A patent/CN102484237B/zh active Active
- 2009-08-28 US US13/392,170 patent/US8748035B2/en active Active
- 2009-08-28 KR KR1020127002383A patent/KR101242316B1/ko not_active IP Right Cessation
- 2009-08-28 WO PCT/JP2009/065032 patent/WO2011024286A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001059181A (ja) * | 1999-08-20 | 2001-03-06 | Dainippon Printing Co Ltd | 表面処理された金属箔 |
JP2001216951A (ja) * | 2000-02-02 | 2001-08-10 | Yuasa Corp | 密閉電池 |
JP2009037817A (ja) * | 2007-08-01 | 2009-02-19 | Toyota Motor Corp | 電池 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012160681A1 (ja) * | 2011-05-25 | 2012-11-29 | トヨタ自動車株式会社 | 電池 |
CN103548183A (zh) * | 2011-05-25 | 2014-01-29 | 丰田自动车株式会社 | 电池 |
US20140087246A1 (en) * | 2011-05-25 | 2014-03-27 | Nobuo Yamamoto | Battery |
JP5482965B2 (ja) * | 2011-05-25 | 2014-05-07 | トヨタ自動車株式会社 | 電池 |
JPWO2012160681A1 (ja) * | 2011-05-25 | 2014-07-31 | トヨタ自動車株式会社 | 電池 |
KR101527671B1 (ko) * | 2011-05-25 | 2015-06-09 | 도요타지도샤가부시키가이샤 | 전지 |
JP2013187175A (ja) * | 2012-03-12 | 2013-09-19 | Kojima Press Industry Co Ltd | 端子接続構造 |
WO2013147372A1 (en) * | 2012-03-26 | 2013-10-03 | Shin Heung Energy & Electronic Co.,Ltd. | Highly heat-resistantfilm for electrode terminals, method for producing the heat-resistant film and electrode terminal structure including the heat-resistant film |
US9985269B2 (en) | 2012-03-26 | 2018-05-29 | Shin Heung Energy & Electronic Co., Ltd. | Highly heat-resistant film for electrode terminals |
Also Published As
Publication number | Publication date |
---|---|
US20120156536A1 (en) | 2012-06-21 |
KR101242316B1 (ko) | 2013-03-11 |
CN102484237A (zh) | 2012-05-30 |
JP5273160B2 (ja) | 2013-08-28 |
JPWO2011024286A1 (ja) | 2013-01-24 |
CN102484237B (zh) | 2014-03-12 |
KR20120048582A (ko) | 2012-05-15 |
US8748035B2 (en) | 2014-06-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5273160B2 (ja) | 電池、車両及び電池搭載機器 | |
KR101146414B1 (ko) | 이차 전지 | |
KR101233512B1 (ko) | 이차 전지의 단자 | |
KR101867374B1 (ko) | 전극 단자를 구비한 배터리 덮개, 전극 단자를 구비한 배터리 덮개 제조 방법 및 실링된 배터리 | |
KR101222286B1 (ko) | 이차전지 | |
KR101222264B1 (ko) | 이차 전지 | |
US20120107675A1 (en) | Terminal of rechargeable battery, method of assembling the terminal of rechargeable battery, rechargeable battery module and method of assembling the rechargeable battery module | |
KR20110133257A (ko) | 이차 전지 | |
KR101470058B1 (ko) | 이차전지용 파우치 외장재 및 이를 이용한 이차전지 | |
KR101527671B1 (ko) | 전지 | |
EP2958162A1 (en) | Secondary battery | |
KR101427541B1 (ko) | 전기 부품, 비수 전해질 전지 및 그것에 이용하는 리드선 및 봉입 용기 | |
JP5282070B2 (ja) | 二次電池 | |
KR101106328B1 (ko) | 이차 전지용 케이스 및 그 제조 방법 | |
JP2012146664A (ja) | 2次電池、その組み立て方法およびこれを含むバッテリーパック | |
JP5679272B2 (ja) | 電極端子付き電池蓋および密閉型電池 | |
EP3010069A1 (en) | Secondary battery | |
US10181619B2 (en) | Method of manufacturing nonaqueous electrolyte secondary battery | |
JP2002313289A (ja) | 電 池 | |
US8637181B2 (en) | Terminal and rechargeable battery and method of assembling the same | |
JP5679271B2 (ja) | 電極端子付き電池蓋、電極端子付き電池蓋の製造方法および密閉型電池 | |
JP5510260B2 (ja) | 電池 | |
JP2020095837A (ja) | 二次電池の製造方法 | |
CN115298888B (zh) | 电池包及电动工具 | |
JP5887957B2 (ja) | 密閉型電池及び密閉型電池の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980161146.1 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010544104 Country of ref document: JP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09848734 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20127002383 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13392170 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09848734 Country of ref document: EP Kind code of ref document: A1 |