WO2012077216A1 - 二次電池 - Google Patents
二次電池 Download PDFInfo
- Publication number
- WO2012077216A1 WO2012077216A1 PCT/JP2010/072145 JP2010072145W WO2012077216A1 WO 2012077216 A1 WO2012077216 A1 WO 2012077216A1 JP 2010072145 W JP2010072145 W JP 2010072145W WO 2012077216 A1 WO2012077216 A1 WO 2012077216A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- secondary battery
- terminal insulating
- insulating member
- positive
- engaging
- Prior art date
Links
- 230000005855 radiation Effects 0.000 claims description 21
- 210000000078 claw Anatomy 0.000 claims description 19
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 230000000295 complement effect Effects 0.000 claims 3
- 230000013011 mating Effects 0.000 abstract 4
- 238000000034 method Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009420 retrofitting Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004804 winding Methods 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6553—Terminals or leads
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- 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
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic 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
Definitions
- the present invention relates to a secondary battery having a terminal insulating member that insulates an external terminal from a metal container of the secondary battery.
- Patent Document 1 proposes a structure in which a cover that covers the safety valve discharge ports of a plurality of secondary batteries is provided so as to collect gas when gas is discharged from any of the secondary batteries.
- Patent Document 2 proposes a structure in which a connecting part for directly connecting a gas collecting part is provided in the vicinity of a safety valve formed in an outer portion of a secondary battery.
- JP 2010-1113888 power storage device and vehicle
- JP 2010-49942 Battery system
- the present invention provides a power generating body housed in a battery container sealed with a lid, a positive / negative external terminal connected to each of the power generating bodies, and a positive / negative external terminal connected to each of the power generating bodies.
- a pair of terminal insulating members that insulate each of the lids, and at least one of the pair of terminal insulating members is formed with a mounting portion for mounting an external component to the battery container.
- FIG. 1 is an external perspective view showing an embodiment of a secondary battery according to the present invention.
- the disassembled perspective view of the secondary battery of FIG. The elements on larger scale of the secondary battery of FIG.
- the expansion perspective view which shows the state which mounted
- FIG. 14 is a plan view of FIG. 13.
- the perspective view which shows the thermal radiation functional component of FIG. The XVII arrow directional view of FIG. Sectional drawing which follows the XVII-XVII arrow line of FIG.
- the perspective view which shows the assembled battery comprised by the secondary battery of FIG. The exploded perspective view which looked at the assembled battery of FIG. 18 from the same direction.
- the enlarged view which shows the XXII part in FIG. The enlarged view which shows the XXIII part in FIG.
- the secondary battery SB shown in FIG. 1 includes a case 1 and a lid 6 that constitute a battery container.
- the front surface of the case 1 indicated by the symbol WS is referred to as the maximum surface
- the side surface of the case 1 indicated by the symbol WN is referred to as the minimum surface.
- the left-right direction of the front of the case 1 is referred to as the battery width
- the side width, that is, the depth direction of the battery is referred to as the battery thickness.
- the power generation body 3 (FIG. 2) is housed in the case 1, and the case 1 is sealed with a lid 6.
- the lid 6 is welded to the case 1 to form a battery container.
- the lid 6 is provided with a positive external terminal 9A and a negative external terminal 9B.
- the electric power stored in the power generator 3 is supplied to the external load via the positive and negative external terminals 9A and 9B, and the power generated by the regenerative operation is charged to the power generator 3 via the positive and negative external terminals 9A and 9B.
- a gas discharge valve 10 is integrally provided on the lid 6. When the pressure in the battery container rises, the gas discharge valve 10 opens to discharge gas from the inside, and the pressure in the battery container is reduced. Thereby, the safety of the secondary battery SB is ensured.
- the lid 6 is provided with a liquid injection port 11 for injecting an electrolytic solution into the case 1, and the liquid injection port 11 is sealed with a liquid injection plug 12 after the electrolytic solution is injected.
- Reference numerals 8A and 8B are caulking members for fixing the positive and negative external terminals 9A and 9B to the lid, which will be described in detail later.
- the secondary battery SB will be described in more detail with reference to FIG. 2 which is an exploded perspective view of the secondary battery SB.
- the power generator 3 is accommodated in the case 1 of the secondary battery SB via an insulating bag 2 made of an insulating material.
- the power generation body 3 is an electrode group in which the positive and negative electrode bodies are wound in a flat shape via a separator, and the electrode foil exposed surface on which the positive electrode mixture and the negative electrode mixture are not applied on both ends in the winding axis direction.
- the lower ends of positive and negative electrode connecting members (caulking members) 8A and 8B are caulked and fixed to the other ends 4A2 and 4B2 of the positive and negative current collecting plates 4A and 4B.
- the upper ends of the positive and negative electrode connecting members 8A and 8B extend through the lid 6 to the upper surface of the battery.
- Terminal insulating members 7A and 7B and positive and negative external terminals 9A and 9B are laminated on the upper surface of the battery lid 6, and the negative electrode connecting members 8A and 8B are connected to the lid 6, the terminal insulating members 7A and 7B, and positive and negative external parts.
- Each of the terminals 9A and 9B penetrates the battery case 1 and protrudes outside the battery case 1.
- the positive and negative electrode connecting members 8A and 8B and the positive and negative electrode external terminals 9A and 9B are fixed by caulking.
- the positive and negative external terminals 9A and 9B are electrically connected to the positive and negative current collector plates 4A and 4B by the positive and negative electrode connecting members 8A and 8B, and the positive and negative external terminals 9A and 9B by the terminal insulating members 7A and 7B.
- 9B is insulated from the battery lid 6.
- the positive and negative electrode connecting members 8A and 8B are electrically insulated from the lid 6 by gaskets 5A and 5B.
- the feature of the present invention is that various accessory parts of the secondary battery SB can be mounted on the lid 6, that is, the battery container, using the positive and negative terminal insulating members 7A and 7B.
- a gas collection duct, a thermal radiation function member, and a cell holder are illustrated and demonstrated as an accessory part.
- FIG. 3 is a view of the upper surface of the lid 6 as viewed from obliquely above the battery
- FIG. 4 is an enlarged view of the main part around the positive electrode external terminal of FIG. 3
- FIG. 5 is a view of FIG. FIG. 4 is a diagram when FIG. 4 is viewed from the VI direction.
- FIG. 7 is a longitudinal sectional view of the peripheral structure of the positive and negative external terminals, in particular, a detailed view showing the caulking structure of the positive and negative electrode connecting members 8A and 8B and the positive and negative external terminals 9A and 9B on the upper surface of the lid 6. It is.
- the positive external terminal 9A is a metal plate formed in a substantially flat plate shape.
- the positive external terminal 9A has a caulking fixing portion 91A to which the positive electrode connecting member 8A is caulked and a bus bar attaching portion 92A to which a bus bar (not shown) for connection to an external load is attached.
- the caulking fixing portion 91A and the bus bar mounting portion 92A are connected to each other by a connection plate 93A having a downward slope toward the center of the battery and a narrow width.
- the positive terminal insulating member 7A which is an insulating plate formed in a substantially flat plate shape, includes a first support base 71A on which the caulking fixing portion 91A is placed and a second support base 72A on which the bus bar mounting portion 92A is placed. Have. The periphery of the first support base 71A and the second support base 72A is surrounded by a wall 7W, and the positive electrode external terminal 9A is positioned in a region surrounded by the wall 7W.
- the first support base 71A of the positive electrode terminal insulating member 7A is provided with a through hole 71A1, and the caulking fixing portion 91A is provided with a through hole 91A1. Corresponding to these, a similar through hole is also provided in the lid 6.
- the columnar positive electrode connecting member 8A penetrates these through holes, and the upper and lower ends of the positive electrode connecting member 8A extend inside and outside the battery container.
- the lower end of the positive electrode connection member 8A is fixed to the positive electrode current collector plate 4A by caulking, and the upper end is fixed to the caulking fixing portion 91A of the positive electrode external terminal 9A by caulking.
- the terminal insulating member 7A is sandwiched between the lid 6 and the positive external terminal 9A.
- the terminal insulating member 7A includes the first support base 71A and the second support base 72A, and as a whole, the terminal insulating member 7A is formed in an oval shape whose width is slightly smaller than the thickness of the battery container. .
- the tip of the first support base 71A is formed in an arc shape
- the second support base 72A is formed in a substantially square shape as a whole.
- An engagement recess 75 having a recessed rectangular cross section is provided on the side surface of the arcuate tip of the first support base 71A, and a recess having a recessed rectangular cross section is formed on the side surface of the second support base 72A facing the engagement recess 75.
- a concavity 76 is provided.
- a recessed circular cross-sectional engagement 77 is provided at substantially the center of both side surfaces of the terminal insulating member 7A along the width direction of the battery case.
- the negative electrode external terminal 9B is the same component as the positive electrode external terminal 9A, and the negative electrode terminal insulating member 7B is the same component as the positive electrode terminal insulating member 7A.
- the engagement recesses 75 to 77 are provided on the four peripheral surfaces of the flat-plate-shaped terminal insulating member 7A, respectively, for positioning and fixing the accessory parts (retrofit parts) to be retrofitted to the secondary battery SB. Used.
- accessory parts will be described.
- the gas collection duct 13 is covered with an engagement recess 76 provided on the opposing surfaces of the first support bases 71A and 71B of the positive and negative terminal insulating members 7A and 7B. It is to be mounted on the top surface.
- the gas collection duct 13 has a substantially rectangular base 131, and the base 131 has a width substantially equal to the width of the lid 6 and the first terminal insulating members 7 ⁇ / b> A and 7 ⁇ / b> B. It has a length slightly shorter than the distance between the opposing surfaces of the support bases 71A and 7IB and a thickness (height) substantially equal to that of the first support bases 71A and 71B. Therefore, the base 131 is accommodated in a well-contained manner so as to be continuous with the first and second support bases 71A and 71B between the two terminal insulating members 7A and 7B.
- the gas collection duct 13 is formed of, for example, a synthetic resin, and the base 131 has a hollow shape reinforced with ribs 135.
- claws 13 ⁇ / b> A that engage with the engaging recesses 76 and are elastically deformable in the longitudinal direction of the base portion 131 are provided.
- the claw 13A slightly protrudes from the end surface of the base 131.
- a discharge port 132 for discharging gas is provided so as to protrude upward.
- a male screw 134 is formed on the outer periphery of the discharge port 132.
- a gas discharge pipe (not shown) and a gas discharge hose (not shown) can be attached using the male screw 134.
- the base 131 is provided with a gas collection chamber 133 communicating with the discharge port 132.
- an O-ring 13B is mounted in an O-ring mounting groove formed so as to surround the gas collection chamber 133.
- the gas collection duct 13 is arranged in an airtight manner in close contact with the outlet side of the gas discharge valve 10 by an O-ring 13B.
- the gas collection duct 13 having the O-ring 13B mounted in the O-ring mounting groove on the bottom surface of the base is pressed from above the lid 6 into the region between the positive and negative terminal insulating members 7A and 7B.
- the claw 13A of the gas collection duct 13 protrudes slightly from the end surface of the base 131.
- the claw 13A has the first claw 13A as shown in FIG. While being in contact with the inner surfaces of the support bases 71 ⁇ / b> A and 71 ⁇ / b> B, it is once pushed inward, and then elastically protrudes into the engagement recess 75 and engages.
- the O-ring 13 ⁇ / b> B mounted in the O-ring mounting groove is appropriately pressed and deformed, and the gas collection chamber 133 is tightly adhered to the lid 6.
- the gas discharged from the discharge valve 10 when the internal pressure of the secondary battery SB exceeds the threshold value is collected in the gas collection chamber 133. While being discharged, it is discharged from the discharge port 132. And it discharges
- the O-ring 13 ⁇ / b> B is appropriately deformed by the gas pressure, and gas leakage from the gas collection duct 13 is prevented.
- the gas collection duct 13 can be supported and fixed by the engagement concave portions 75 of the terminal insulating members 7A and 7B without using a separate attachment component. Therefore, the gas collection duct mounting dedicated member becomes unnecessary, and the cost can be reduced.
- the longitudinal dimension of the gas collecting duct 13 is made substantially the same as the separation distance between the positive and negative electrode terminal insulating members 7A and 7B, and the lateral dimension is slightly smaller than the thickness direction dimension of the battery. That is, the shape of the gas collection duct 13 in plan view is set within the outer dimension of the lid. As a result, even if the gas collection duct 13 is mounted, the size does not increase in the thickness direction (short direction) and the width direction (longitudinal direction) of the secondary battery SB.
- the secondary battery SB Since the secondary battery SB generates heat due to charging / discharging of the power generation body 3, it may be cooled by mounting a heat radiation function component as necessary. Therefore, an application example in which the heat radiation function component 14 is simply attached to the positive and negative terminal insulating members 7A and 7B will be described with reference to FIGS.
- the heat radiation functional component 14 is mounted on the first support bases 71A and 71B of the positive and negative electrode terminal insulating members 7A and 7B, respectively.
- a heat transfer sheet 15 is interposed between the heat radiation functional component 14, the caulking member 8A, and the positive external terminal 9A, and the heat of the power generating body 3 is transmitted from the caulking member 8A and the positive external terminal 9A. Heat is effectively transferred to the heat dissipation functional component 14.
- the heat transfer sheet 15 it is possible to use a soft sheet formed of a soft material such as silicon or rubber having adhesiveness, elasticity performance, and heat conduction performance.
- the heat radiation functional parts 14 mounted on the positive and negative terminal insulating members 7A and 7B are the same, and the positive and negative terminal insulating members 7A and 7B are also the same.
- the positive terminal insulating member 7A side will be mainly described. .
- the heat dissipation functional component 14 is formed in a substantially cubic shape having a thickness substantially the same as the thickness of the battery container.
- the heat radiating functional component 14 includes a flat plate-shaped base portion 141 that abuts the upper surface of the first support base 71A, a plurality of fins 143 that are erected on the upper surface of the base portion 141 at predetermined intervals, and both side ends of the lower surface of the base portion 141. And a pair of sandwiching plates 142 extending along the side surface of the first support base 71A.
- the pair of sandwiching plates 142 has a pair of projecting portions 142a protruding from the base portion 141, and are fitted into the pair of engaging recesses 77 of the first support base 71A on the opposing surfaces of these projecting portions 142a.
- Each boss 14B is projected.
- projection parts 142a can be elastically deformed in the expansion / contraction direction of both space
- An engaging portion bent inward of the base portion 141 is formed at the tip of the claw 14A.
- the claw 14A and the boss 14B are positioned so that the base 141 is close to the external terminal 9A and the caulking member 8A in a state where the heat radiation function component 14 is attached to the terminal insulating member 7A.
- the claws 14A are elastically deformed to engage with the engaging recesses 76, and the pair of bosses 14B are extended from the clamping plate 142.
- the portion 142a is engaged with the engaging recess 77 by elastically deforming outward.
- a method for mounting the heat dissipation functional component 14 will be described. As shown in FIG. 17, a heat transfer sheet 15 is laid in advance on the upper surface of the connection member 8A.
- the heat radiating functional component 14 is slid outwardly in the battery container longitudinal direction along both side surfaces of the first support base 71A while elastically deforming the projecting portion 142a of the holding plate 142 outward and pushing open.
- the boss 14B reaches the position of the engaging recess 77, the overhanging portion 142a is restored and deformed, and the boss 14B engages with the engaging recess 77.
- the heat radiation function component 14 is pivotally supported by the engaging recess 77 in the boss 14 ⁇ / b> B, and can swing around the engaging recess 77.
- the heat radiating functional component 14 is rotated toward the lid 6 around the engaging recess 77 to engage the claw 14A with the engaging recess 76.
- the heat of the positive and negative external terminals 9A and 9B transferred from the power generator 3 is transmitted to the heat radiation function component 14 through the heat transfer sheet 15, and The heat is quickly transmitted to the fins 143 and radiated.
- the heat of the connection terminal 9A is efficiently radiated, the overheating of the secondary battery SB is prevented, the deterioration of the performance of the secondary battery SB can be prevented, and the life can be extended.
- the heat radiation functional component 14 can be supported and fixed to the terminal insulating members 7A and 7B by the engagement concave portions 76 and 77 without using a separate mounting component. Therefore, a member dedicated to mounting a heat radiation function component is not required, and the cost can be reduced.
- the shape of the heat radiation functional component 14 in plan view is accommodated within the outer dimensions of the lid. As a result, even if the heat dissipation functional component 14 is mounted, the size does not increase in the thickness direction (short direction) and the width direction (longitudinal direction) of the secondary battery SB. (3) The operation of attaching the heat radiation function component 14 to the terminal insulating members 7A and 7B is extremely easy.
- a heat transfer sheet 15 is interposed between the heads of the positive and negative electrode connecting members 8A and 8B to which the heat of the power generator 3 is transferred from the positive and negative current collector plates 4A and 4B and the positive and negative electrode external terminals 9A and 9B. Therefore, the heat of the power generation body 3 can be efficiently transferred to the positive and negative external terminals 9A and 9B to cool the secondary battery efficiently.
- the claw 14A may be engaged with the engagement recess 76 simultaneously with the insertion of the boss 14B into the engagement recess 77 when the heat radiation function component 14 is attached to the terminal insulating member 7A.
- Example (3) An application example in which the cell holder is mounted using the engaging recesses of the terminal insulating members 7A and 7B when a plurality of secondary batteries SB are configured as a battery pack using the cell holder will be described with reference to FIGS.
- the cell holder is used for positioning a plurality of secondary batteries SB.
- the assembled battery 100 shown in FIG. 18 is assembled by arranging a plurality of secondary batteries SB in parallel in the thickness direction and inserting the cell holder 16 between the adjacent secondary batteries SB.
- FIG. 19 is an exploded perspective view of the assembled battery shown in FIG. 18 as viewed from the same direction, with the secondary battery SB and the cell holder 16 shown separately, and FIG. 20 opposite to the assembled battery shown in FIG. It is the disassembled perspective view seen from the side, and is a figure which isolate
- FIG. 19 is an exploded perspective view of the assembled battery shown in FIG. 18 as viewed from the same direction, with the secondary battery SB and the cell holder 16 shown separately, and FIG. 20 opposite to the assembled battery shown in FIG. It is the disassembled perspective view seen from the side, and is a figure which isolate
- the cell holder 16 will be described with reference to FIGS.
- the cell holder 16 has a rectangular plate shape that is slightly larger than the maximum surface of the secondary battery SB, and is made of an insulating synthetic resin.
- the cell holder 16 has a main plate 161 disposed opposite to the maximum surface of the secondary battery, an upper edge member 162 that extends along the upper edge of the secondary battery SB, and extends along the lower edge of the secondary battery SB.
- a lower edge member 163 is formed, and air passages are formed on the front and back surfaces of the main plate 160 at predetermined intervals in the horizontal direction.
- the main plate 161 is sandwiched between upper and lower edge members 162 and l63.
- a pressing member 162a having a length substantially the same as the thickness of the secondary battery SB projects from the one end of the upper edge member 162 in the direction perpendicular to the thickness direction of the secondary battery SB.
- bosses 16A that engage with the engaging recesses 77 project on the front and back surfaces of the upper edge member 162 near the pressing member 162a.
- a claw 16B that engages with the engaging recess 76 projects from the inner surface of the pressing member 162a.
- a mounting protrusion 16C on which the bottom surface of the secondary battery SB is mounted protrudes on one surface of the central portion of the lower edge member 163, and the end portion near the opposite side of the pressing member 162a of the upper edge member 162.
- a prismatic holding protrusion 16D is provided on one surface of the protrusion.
- the cell holder 16 is mounted on one of the maximum surfaces of all the secondary batteries SB that are the assembled battery objects in the following procedure.
- One of the pair of bosses 16A of the upper edge member 162 of the cell holder 16 is engaged with the engagement recess 77 of the terminal insulating member 7A of the secondary battery SB, and the claw 16B of the pressing member 162a of the upper edge member 162 is connected to the terminal insulating member.
- the cell holder 16 is attached to the secondary battery SB by engaging with the engaging recess 76 of 7A.
- the assembled battery is assembled by sequentially accumulating a plurality of secondary batteries SB mounted with the cell holder 16 in the thickness direction according to the following procedure.
- the main plate 161 of the cell holder 16 attached to the secondary battery SB is placed in close contact with the maximum surface of the adjacent secondary battery SB.
- the bottom surface of the secondary battery SB is mounted on the mounting protrusion 16C, and the pressing protrusion 16D is locked to the edge of the upper surface of the lid 6 of the secondary battery SB.
- the assembled battery shown in FIG. 18 can be manufactured by repeating the above procedure for all the secondary batteries SB that are the assembled battery objects.
- the assembled battery manufactured in this way the following operational effects are obtained. (1) Since a plurality of unit cells are assembled as an assembled battery using the cell holder 16 attached to the terminal insulating members 7A and 7B, it is necessary to use special parts for attaching the cell holder 16 to the secondary battery. The number of parts can be reduced.
- the cell holder 16 can be attached to the secondary battery SB in advance, and the efficiency of the assembling work is good.
- the secondary battery according to the present invention can be modified as follows. (1) While using the same positive and negative terminal insulating member and mounting the accessory using both of the two insulating members, the positive and negative terminal insulating member may be separate members. (2) Although the case where the external component is mounted on the pair of positive and negative terminal insulating members has been described, the external component may be mounted on only one of them.
- the terminal insulating member is configured so that a plurality of types of external components can be mounted, but may be configured so that only one type of external component can be mounted.
- the secondary battery according to the present invention is configured to attach the battery accessory to the secondary battery using an insulating member that insulates the external terminal from the lid, and the present invention is not limited to the above embodiment.
- the following aspects are also included in the present invention.
- (1) The shape and position of the engaging recess provided in the terminal insulating member are not limited to the embodiment.
- the accessory parts are not limited to the embodiment, and the present invention can be applied to various external parts.
- the power generator and the external terminal are electrically connected by the current collector plate, the external terminal and the current collector plate may be integrated, that is, manufactured as one member.
- the configuration of the power generator is not limited to the embodiment.
- the shape of the battery container is not limited to the embodiment.
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Abstract
Description
たとえば、特許文献1では、複数個の二次電池の安全弁排出口を全体的に覆うカバーを設け、いずれの二次電池からガスが排出されたときにもガスを捕集する構造が提案されている。
特許文献2では、二次電池の外郭部に形成された安全弁の近傍にガス捕集用部品を直接接続するための接続用部品を設けた構造が提案されている。
―電池全体構成―
図1に示す二次電池SBは、電池容器を構成するケース1および蓋6を備える。この明細書において、符号WSで示されるケース1の正面を最大面と呼び、符号WNで示されるケース1の側面を最小面と呼ぶ。ケース1の正面の左右方向を電池の幅と呼び、側面の幅、すなわち電池の奥行き方向を電池の厚さと呼ぶ。
符号8A,8Bは、正負極外部端子9A,9Bを蓋に固定するかしめ部材であり、後に詳細に説明する。
発電体3は絶縁材料で作製された絶縁袋2を介して二次電池SBのケース1内に収容されている。発電体3は、セパレータを介して正負極体を扁平形状に捲回した電極群であり、捲回軸方向の両端側には、正極合剤および負極合剤が塗布されていない電極箔露出面がそれぞれ正極接続部31と負極接続部32として形成され、これらの正負極接続部31,32には正負極集電板4A,4Bの一端4A1,4B1がそれぞれ接続されている。正負極集電板4A,4Bの他端4A2,4B2には、正負極接続部材(かしめ部材)8A,8Bの下端部がかしめ固定されている。正負極接続部材8A,8Bの上端部は蓋6を貫通して電池上面まで延在している。電池蓋6の上面には端子絶縁部材7A,7Bと正負極外部端子9A,9Bとが積層して配設され、負極接続部材8A,8Bは蓋6と端子絶縁部材7A,7Bと正負極外部端子9A,9Bをそれぞれ貫通して電池ケース1の外部に突出され、蓋6の上面において、正負極接続部材8A,8Bと正負極外部端子9A,9Bとがかしめ固定されている。
正極外部端子9Aは、略平板状に形成された金属板である。正極外部端子9Aは、正極接続部材8Aがかしめ結合されるかしめ固定部91Aと、外部負荷との接続のためのバスバー(図示省略)が取り付けられるバスバー取付部92Aとを有している。かしめ固定部91Aとバスバー取付部92Aとは、電池中央に向かって下り勾配で、かつ、幅が狭く形成されている接続板93Aにより接続されている。
上述したように、端子絶縁部材7Aは、第1支持台71Aと第2支持台72Aを有し、全体として、幅が電池容器の厚さに対してやや小さい寸法の小判形状に形成されている。第1支持台71Aの先端は円弧状に形成され、第2支持台72Aは全体が略正方形形状に形成されている。第1支持台71Aの円弧状先端の側面には窪んだ矩形断面形状の係合凹部75が設けられ、係合凹部75と対向する第2支持台72Aの側面には窪んだ矩形断面形状の係合凹部76が設けられている。さらに、端子絶縁部材7Aの電池容器の幅方向に沿った両側面の略中央部には窪んだ円形断面形状の係合77がそれぞれ設けられている。
上述したように、二次電池SBでは、電池容器の内圧が所定値を越えるとガス排出弁10からガスが外部に排出される。そこで、排出されたガスが二次電池SBの周囲に飛散しないように適宜な箇所まで導くガス捕集ダクトが用いられる。このガス捕集ダクトを正負極端子絶縁部材7A,7Bに簡単に装着する適用例について、図8~図12を参照して説明する。
基部底面のOリング装着溝にOリング13Bを装着したガス捕集ダクト13を、正負極端子絶縁部材7A,7Bの間の領域に蓋6の上方から押し付ける。ガス捕集ダクト13の爪13Aは基部131の端面よりも若干突出しており、基部131を両端子絶縁部材7A、7Bの間に上方から押し込むと、図12に示すように、爪13Aは第1支持台71A、71Bの内面に接しつつ、一旦内側に押し込まれた後、係合凹部75内に弾性的に突出して係合する。このとき、Oリング装着溝に装着したOリング13Bが適度に押圧変形され、ガス捕集室133が蓋6に気密的に密着される。
係合凹部を用いて放熱機能部品を装着する適用例を、図13~図17を参照して説明する。
図17に示すように、接続部材8Aの上面には伝熱シート15を予め敷いておく。挾持板142の張出部142aを外方に弾性変形させて押し開きながら第1支持台71Aの両側面に沿って放熱機能部品14を電池容器長手方向外側に向けてスライド操作する。ボス14Bが係合凹部77の位置に至ると、張出部142aが復元変形してボス14Bが係合凹部77に係合する。これによって、放熱機能部品14は、ボス14Bにおいて係合凹部77によって枢支され、係合凹部77を中心に揺動自在となる。係合凹部77を中心に放熱機能部品14を蓋6に向かって回転させて爪14Aを係合凹部76に係合させる。
(1)別段の取り付け部品を使用することなく、放熱機能部品14を係合凹部76と77によって端子絶縁部材7A,7Bに支持、固定することができる。したがって、放熱機能部品取付専用部材を必要とせず、コスト低減を図ることができる。
(3)放熱機能部品14の端子絶縁部材7A、7Bへの取り付け作業は極めて容易である。
複数の二次電池SBをセルホルダで組電池として構成する際、端子絶縁部材7A,7Bの係合凹部を用いてセルホルダを装着する適用例を、図18~図23を参照して説明する。セルホルダは、複数の二次電池SBを位置決めするために使用される。
図19は、図18で示した組電池を同方向から見た分解斜視図であり、二次電池SBとセルホルダ16を分離して示す図、図20は、図18で示した組電池を反対側から見た分解斜視図であり、二次電池SBとセルホルダ16を分離して示す図である。
セルホルダ16は、二次電池SBの最大面よりやや大きい長方形板状であり、絶縁性の合成樹脂で作製されている。セルホルダ16は、二次電池の最大面と対向配置される主板161と、二次電池SBの上縁に沿って延在する上縁部材162と、二次電池SBの下縁に沿って延在する下縁部材163とを有し、主板160の表裏面には水平方向に所定間隔で空気通路が形成されている。主板161は上下縁部材162,l63に挟まれている。上縁部材162の一方の端部から、二次電池SBの厚さ方向にその厚さと略同一の長さを有する押さえ部材162aが直角方向に突設されている。上縁部材162の押さえ部材162aに近い端部側の表裏面には、係合凹部77に係合するボス16Aが突設されている。また、押さえ部材162aの内側面には、係合凹部76に係合する爪16Bが突設されている。
以下のような手順で、まず組電池対象である全ての二次電池SBの一方の最大面にセルホルダ16を装着する。セルホルダ16の上縁部材162の一対のボス16Aの一方を二次電池SBの端子絶縁部材7Aの係合凹部77に係合するとともに、上縁部材162の押さえ部材162aの爪16Bを端子絶縁部材7Aの係合凹部76に係止することにより、二次電池SBにセルホルダ16が装着される。
(1)端子絶縁部材7A,7Bに装着したセルホルダ16を使用して複数の単電池を組電池として組み立てるようにしたので、セルホルダ16を二次電池に装着するための特別の部品を使用する必要がなく、部品点数の低減を図ることができる。
(4)組電池100の組み立てに際して、あらかじめ二次電池SBにセルホルダ16を装着しておくことができ、組み立て作業の効率がよい。
(1)同一の正負極端子絶縁部材を用いるとともに、二つの絶縁部材をともに利用して付属部品を装着するようにしたが、正負極端子絶縁部材は別々の部材としてもよい。
(2)正負極一対の端子絶縁部材に外付部品を装着する場合について説明したが、いずれか一方にのみ外付部品を装着するようにしてもよい。
(4)端子絶縁部材は、複数種類の外付部品が装着可能に構成したが、1種類のみの外付部品を装着可能に構成してもよい。
(1)端子絶縁部材に設けた係合凹部の形状、形成位置などは実施形態に限定されない。
(2)付属部品も実施形態に限定されず、種々の外付部品に対して本発明を適用できる。
(3)発電体と外部端子を集電板により電気的に接続したが、外部端子と集電板とを一体化、すなわち一つの部材として作製してもよい。
(4)発電体の構成も実施形態に限定されない。
(5)電池容器の形状も実施形態に限定されない。
(6)外部端子を電池容器の電池蓋に設けるようにしたが、最大面に外部端子を設けた二次電池にも本発明を適用できる。
Claims (11)
- 蓋で密閉された電池容器内に収容された発電体と、
前記蓋にそれぞれが設けられるとともに、前記発電体のそれぞれに前記正負極集電部材を介して接続された正負極外部端子と、
前記正負極外部端子をそれぞれ前記蓋に対して絶縁する一対の端子絶縁部材とを備え、
前記一対の端子絶縁部材の少なくとも一方には、外付部品を前記電池容器に装着するための装着部が形成されていることを特徴とする二次電池。 - 請求項1記載の二次電池において、
前記正負極外部端子は、正負極集電板を介して前記発電体の正負極板に接続されていることを特徴とする二次電池。 - 請求項1または2記載の二次電池において、
前記蓋に設けられたガス排出弁を覆うように前記蓋に前記外付部品として設けられるガス捕集ダクトをさらに備えるとともに、前記装着部は係合部であり、
前記ガス捕集ダクトには、前記係合部と互いに弾性的に係合して前記端子絶縁部材に係止される係止部が設けられていることを特徴とする二次電池。 - 請求項3記載の二次電池において、
前記一対の端子絶縁部材のそれぞれには前記係合部が設けられ、
前記ガス捕集ダクトは前記一対の端子絶縁部材の間に横設して設けられ、
前記端子絶縁部材の前記係合部は、前記一対の端子絶縁部材が互いに対向する対向面に設けられた凹部または突部であり、
前記ガス捕集ダクトの長手方向両端部には、前記端子絶縁部材の前記凹部または前記突部と弾性的に係合する相補形状の凸部または凹部の前記係止部がそれぞれ設けられ、
前記外付部品が前記一対の端子絶縁部材の双方を用いて電池容器に装着されるようにしたことを特徴とする二次電池。 - 請求項1乃至4のいずれか1項記載の二次電池において、
前記二次電池を冷却するように、前記端子絶縁部材のそれぞれに前記外付部品として設けられた一対の放熱機能部品をさらに備えるとともに、前記装着部は係合部であり、
前記放熱機能部品には、前記端子絶縁部材に設けた前記係合部と互いに弾性的に係合して前記端子絶縁部材に係止される係止部が設けられていることを特徴とする二次電池。 - 請求項5記載の二次電池において、
前記端子絶縁部材に設けた前記係合部は、前記一対の端子絶縁部材が互いに対向する対向面のそれぞれに設けた第1係合部と、
前記電池容器の長手方向に延在する前記端子絶縁部材の両側面に設けた第2および第3係合部とを含み、
前記放熱機能部品には、前記第1~第3係合部と係止される第1~第3係止部が設けられていることを特徴とする二次電池。 - 請求項6記載の二次電池において、
前記第1~第3係合部のそれぞれは凹部または突部であり、
前記第1~第3係止部は、前記凹部または突部とは相補形状に形成されていることを特徴とする二次電池。 - 請求項7記載の二次電池において、
前記第1~第3係合部は凹部であり、前記第1~第3係止部は前記凹部に弾性的に係合する爪であることを特徴とする二次電池。 - 請求項1または2記載の二次電池において、
前記二次電池を保持するため前記端子絶縁部材に前記外付部品として装着されるセルホルダをさらに備えるとともに、前記装着部は係合部であり、
前記セルホルダには、前記端子絶縁部材の前記係合部と互いに係合して前記端子絶縁部材に弾性的に係止される係止部が設けられていることを特徴とする二次電池。 - 請求項9記載の二次電池において、
前記端子絶縁部材に設けた前記係合部は、前記電池容器の長手方向に延在する前記端子絶縁部材の両側面に設けた第1および第2係合部と、前記電池容器の最小面に対向する面に設けた第3係合部とを含み、
前記セルホルダには、前記第1および第2係合部と係止される第1および第2係止部と、前記第3係合部と係止される第3係止部が設けられていることを特徴とする二次電池。 - 請求項10記載の二次電池において、
前記第1~第3係合部のそれぞれは凹部または突部であり、
前記第1~第3係止部は、前記セルホルダが前記端子絶縁部材に弾性的に装着されるように前記凹部または突部とは相補形状に形成されていることを特徴とする二次電池。
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- 2010-12-09 US US13/991,927 patent/US9214653B2/en not_active Expired - Fee Related
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JP2012186114A (ja) * | 2011-03-08 | 2012-09-27 | Hitachi Vehicle Energy Ltd | 二次電池および二次電池モジュール |
KR20130035244A (ko) * | 2011-09-29 | 2013-04-08 | 가부시키가이샤 리튬 에너지 재팬 | 조 전지 |
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KR102017089B1 (ko) | 2011-09-29 | 2019-09-02 | 가부시키가이샤 지에스 유아사 | 조 전지 |
EP2575193B1 (en) * | 2011-09-29 | 2022-10-26 | GS Yuasa International Ltd. | Battery pack |
JP2013235832A (ja) * | 2012-05-04 | 2013-11-21 | Samsung Sdi Co Ltd | 2次電池 |
JP2014182941A (ja) * | 2013-03-19 | 2014-09-29 | Gs Yuasa Corp | 蓄電装置 |
EP3926751B1 (en) * | 2019-12-03 | 2023-06-14 | Contemporary Amperex Technology Co., Limited | Secondary battery with specific current collecting member, battery module and device |
Also Published As
Publication number | Publication date |
---|---|
US20130260190A1 (en) | 2013-10-03 |
US9214653B2 (en) | 2015-12-15 |
JPWO2012077216A1 (ja) | 2014-05-19 |
JP5690844B2 (ja) | 2015-03-25 |
CN103262293A (zh) | 2013-08-21 |
CN103262293B (zh) | 2015-12-16 |
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