WO2012165338A1 - 角形蓄電池 - Google Patents

角形蓄電池 Download PDF

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Publication number
WO2012165338A1
WO2012165338A1 PCT/JP2012/063512 JP2012063512W WO2012165338A1 WO 2012165338 A1 WO2012165338 A1 WO 2012165338A1 JP 2012063512 W JP2012063512 W JP 2012063512W WO 2012165338 A1 WO2012165338 A1 WO 2012165338A1
Authority
WO
WIPO (PCT)
Prior art keywords
safety valve
base
peripheral wall
storage battery
positive electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/063512
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
和昭 浦野
正明 岩佐
拓郎 綱木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vehicle Energy Japan Inc
Original Assignee
Hitachi Vehicle Energy Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Vehicle Energy Ltd filed Critical Hitachi Vehicle Energy Ltd
Priority to US14/119,549 priority Critical patent/US20140141293A1/en
Priority to EP12793524.5A priority patent/EP2738836A4/en
Priority to CN201280026435.2A priority patent/CN103597630B/zh
Publication of WO2012165338A1 publication Critical patent/WO2012165338A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape 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
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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
    • H01M50/147—Lids or covers
    • 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 prismatic storage battery, and more particularly to a prismatic storage battery having a safety valve.
  • a safety valve is usually provided which is released to release the gas when the internal pressure of the battery rises with the generation of the gas.
  • the safety valve is, for example, integrally formed on a lid that is attached by closing the opening of the battery can by pressing or the like.
  • the lid is a substantially flat plate-like member, but the safety valve is formed thinner than the surrounding portion so as to be cleaved when the battery internal pressure reaches a predetermined value. Thus, the safety valve is weaker than the other parts of the lid.
  • a discharge duct for discharging the gas released from the safety valve to the outside is provided.
  • the exhaust duct is attached around the safety valve of each storage battery so as to seal the top of the safety valve from the outside.
  • the safety valve is formed on the inner peripheral side of the rib portion which protrudes in the direction opposite to the battery can from the upper surface of the lid.
  • a power generation element formed by laminating a positive electrode and a negative electrode with a separator interposed therebetween, a power generation element is accommodated, an electrolyte is injected, and a sealed structure is formed by a battery can and a lid member.
  • the lid member is connected to a base having a predetermined thickness having an upper surface and a lower surface, a peripheral wall portion forming a recess sunk from the upper surface of the base, and the peripheral wall portion
  • a safety valve having a peripheral portion is integrally formed, and the upper surface of at least the peripheral portion of the safety valve is located below the lower surface of the base.
  • the upper surface of the peripheral portion of the safety valve is located below the lower surface of the base, and the pressing force X parallel to the upper surface of the battery cover is the thickness of the base at the inner peripheral surface of the peripheral wall Can be supported on the entire surface corresponding to Therefore, the strength of the base 12 with respect to the pressing force X can be made large.
  • FIG. 2 The disassembled perspective view of the square storage battery shown by FIG. FIG. 2 is a perspective view of a state in which a part of the electrode group illustrated in FIG. 1 is developed. 1.
  • (A), (B) is sectional drawing for showing the method of forming a safety valve. Sectional drawing which shows the attachment structure of the battery cover and duct which concern on Embodiment 2 of this invention.
  • Sectional drawing which shows the attachment structure of the battery cover and duct which concern on Embodiment 3 of this invention.
  • Sectional drawing which shows the attachment structure of the battery cover and duct which concern on Embodiment 5 of this invention.
  • FIG. 1 is an external perspective view showing an embodiment of a prismatic storage battery of the present invention
  • FIG. 2 is an exploded perspective view of the prismatic storage battery shown in FIG.
  • an electrode group (power generation element) 40 is accommodated in a thin substantially rectangular battery container 2 composed of a battery lid (lid member) 3 and a battery can 4, and although not shown, it is not shown. It is configured by injecting a water electrolyte.
  • the battery cover 3 and the battery can 4 are made of, for example, aluminum, iron, stainless steel or the like.
  • the positive electrode current collecting plate 21, the negative electrode current collecting plate 31 and the like are integrally assembled to the battery cover 3, and the battery cover unit 10 is configured.
  • the positive electrode current collector plate 21 and the negative electrode current collector plate 31 of the battery cover unit 10 are respectively joined to the positive electrode metal foil or the negative electrode current collector foil of the electrode assembly 40 by, for example, ultrasonic welding, thereby allowing battery cover and power generation.
  • the unit 50 is accommodated from the opening at the upper end of the battery can 4.
  • the battery cover / power generation unit 50 is illustrated as a structure directly accommodated in the battery can 4.
  • the battery cover / power generation unit 50 is temporarily of the same shape as the battery can 4 and has a size
  • the battery can be housed in the battery can 4 after being housed in a slightly smaller insulating bag.
  • FIG. 3 is an external perspective view of a state in which the winding end side of the electrode assembly 40 is developed.
  • the electrode group 40 is formed by winding the positive electrode 41 and the negative electrode 42 in a flat shape around an axial core (not shown) with the first and second separators 43 and 44 interposed therebetween.
  • symbol 40a is a hollow part which has the width
  • the positive electrode 41 is formed by forming a positive electrode mixture layer 41 b on both the front and back sides of a positive electrode metal foil 41 a made of, for example, aluminum foil or the like.
  • the positive electrode mixture layer 41b is formed by coating the positive electrode mixture on the positive electrode metal foil 41a so that the positive electrode mixture unprocessed portion 41c in which the positive electrode metal foil 41a is exposed at one side edge is formed.
  • the negative electrode mixture layer 42b is coated on the front and back sides of a negative electrode metal foil 42a made of copper foil or the like.
  • a negative electrode mixture non-treated portion 42c in which the negative electrode metal foil 42a is exposed is formed at the other side edge which is a side edge opposite to the side edge where the positive electrode mixture non-treated portion 41c is disposed.
  • the positive electrode mixture is coated on the negative electrode metal foil 42a.
  • the positive electrode mixture 10 parts by weight of scaly graphite as a conductive material and 10 parts by weight of PVDF as a binder are added to 100 parts by weight of lithium manganate (chemical formula LiMn 2 O 4 ) as a positive electrode active material, NMP is added to this as a dispersion solvent, and it knead
  • This positive electrode mixture is applied to both sides of a 20 ⁇ m thick aluminum foil leaving a positive electrode mixture unprocessed portion 41c. Thereafter, the resultant is dried, pressed, and cut to obtain a positive electrode 41 having a thickness (a total of both front and back surfaces of the aluminum foil) of 90 ⁇ m which does not contain the aluminum foil.
  • the negative electrode mixture is prepared by adding 10 parts by weight of polyvinylidene fluoride (hereinafter referred to as PVDF) as a binder to 100 parts by weight of amorphous carbon powder as a negative electrode active material, and adding N- It is prepared by adding and kneading methyl virolidone (hereinafter referred to as NMP).
  • PVDF polyvinylidene fluoride
  • NMP N- It is prepared by adding and kneading methyl virolidone
  • This negative electrode mixture is coated on both sides of a 10 ⁇ m thick copper foil leaving a negative electrode mixture unprocessed portion 42c. Thereafter, the resultant is dried, pressed, and cut to obtain a negative electrode 42 having a thickness of 70 ⁇ m (total of both front and back surfaces of copper foil) having no thickness of the negative electrode mixture layer 42b containing no copper foil.
  • the winding start side end portion of the negative electrode 42 is formed between the first and second separators 43 and 44 whose front end portions are welded to an axial core (not shown). Place and wind so as to be located inside the winding start side end of.
  • the positive electrode mixture non-treated portion 41c and the negative electrode mixture non-treated portion 42c are disposed at opposing side edges in the width direction (direction orthogonal to the winding direction).
  • the width of the negative electrode mixture layer 42b in other words, the length in the direction orthogonal to the winding direction, is formed wider than the width of the positive electrode mixture layer 41b.
  • the width of the first separator 43 is such that the positive electrode mixture non-treated portion 41c of the positive electrode 41 is exposed to the outside at one side edge side.
  • the width of the second separator 44 is such that the negative electrode mixture non-treatment portion 42c of the negative electrode 42 is exposed to the outside on the other side edge side.
  • a hollow portion 40a (see FIGS. 2 and 3) is formed on the winding start side of the electrode assembly 40, in other words, on the axial center side. Further, on the winding end side of the electrode assembly 40, the second separator 44 is wound around the outermost periphery, and the negative electrode 42 is wound around the inner periphery thereof. Therefore, the positive electrode mixture layer 41 b is covered with the negative electrode mixture layer 42 b over the entire length and the entire width from the winding start side to the winding end side.
  • the positive electrode 41 in the electrode group 40 the positive electrode mixture non-treated portion 41c of the positive electrode metal foil 41a is exposed to the outside, and the negative electrode 42 in the electrode group 40 is the negative electrode of the negative metal foil 42a.
  • the mixture non-treated portion 42c is exposed to the outside.
  • the battery cover 3 is provided with a liquid injection port 11 for injecting a non-aqueous electrolyte. Further, the battery cover 3 is provided with a safety valve 13 for releasing the pressure when the internal pressure exceeds the reference value due to overcharging or the like. Details of the structure of the battery cover 3 will be described later.
  • lithium hexafluorophosphate (LiPF 6 ) dissolved at a concentration of 1 mol / liter in a mixed solution of ethylene carbonate and dimethyl carbonate mixed in a ratio of 1: 2 by volume ratio can be used.
  • the injection port 11 After injecting the electrolyte, the injection port 11 is fitted with a liquid injection stopper (not shown) and closed by laser welding.
  • the battery lid 3 is joined to the battery can 4 by laser welding and sealed.
  • the battery lid unit 10 includes a battery lid 3, a positive electrode side terminal configuration portion 60, and a negative electrode side terminal configuration portion 70.
  • the positive electrode side terminal configuration portion 60 includes an external positive electrode terminal 61, a positive electrode connection terminal 62, a positive electrode terminal plate 63, an insulating plate 64, and a positive electrode current collector plate 21.
  • the external positive electrode terminal 61, the positive electrode terminal plate 63, the positive electrode connection terminal 62, and the positive electrode current collector plate 21 are integrally attached to the battery cover 3.
  • through holes for inserting the positive electrode connection terminal 62 are formed in the lid 3, the insulating plate 64 and the positive electrode terminal plate 63.
  • a through hole for inserting the external positive electrode terminal 61 is formed in the lid 3.
  • the positive electrode side terminal structure part 60 In order to manufacture the positive electrode side terminal structure part 60, it carries out as follows.
  • the positive electrode current collector 21 is crimped to the positive electrode connection terminal 62 in advance.
  • the insulating plate 64 is disposed in the through hole of the battery lid 3, and the through hole provided in the battery lid 3 and the through hole provided in the insulating plate 64 are aligned with each other.
  • the external positive electrode terminal 61 is inserted into the through hole provided in the positive electrode terminal plate 63 and fixed to the insulating plate 64.
  • the positive electrode connection terminal 62 with the positive electrode current collector 21 crimped is inserted into the through hole of the insulating plate 64 from the back side of the battery cover 3.
  • the front end side of the positive electrode connection terminal 62 has a cylindrical shape slightly smaller than the through hole of the positive electrode terminal plate 63, and the positive electrode terminal terminal portion 60 is formed by caulking the front end portion of the positive electrode connection terminal 62.
  • the battery cover 3 is integrally assembled. In this state, the positive electrode current collector 21, the positive electrode connection terminal 62, the positive electrode terminal plate 63 and the external positive electrode terminal 61 are electrically connected. Further, the positive electrode current collecting plate 21, the positive electrode connection terminal 62, the positive electrode terminal plate 63 and the external positive electrode terminal 61 are insulated from the battery lid 3 by the insulating plate 64.
  • the negative electrode side terminal configuration portion 70 includes an external negative electrode terminal 71, a negative electrode connection terminal 72, a negative electrode terminal plate 73, an insulating plate 74, and a negative electrode current collector plate 31.
  • the negative electrode terminal component 70 has the same structure as the positive electrode terminal component 60, and the external negative electrode terminal 71, the negative electrode terminal plate 73, the negative electrode connection terminal 72 and the negative electrode current collector plate 31 are integrated with the battery lid 3. It is assembled. In this state, the negative electrode current collector 31, the negative electrode connection terminal 72, the negative electrode terminal plate 73, and the external negative electrode terminal 71 are electrically connected. In addition, the negative electrode current collector 31, the negative electrode connection terminal 72, the negative electrode terminal plate 73, and the external negative electrode terminal 71 are insulated from the battery lid 3 by the insulating plate 74.
  • the prismatic storage battery 1 can charge and discharge external electronic devices connected to the external positive electrode terminal 61 and the external negative electrode terminal 71. Become.
  • the positive electrode current collector 21 is made of aluminum.
  • the positive electrode current collector plate 21 has a support 22 a which is attached to the battery cover 3 and is bent at almost 90 °.
  • the bent support portion 22a is bifurcated at an end portion, and a pair of flat joint pieces 23 are formed.
  • Each joint piece 23 is ultrasonically welded to the electrode group 40.
  • the joint pieces 23 are each bent at an inclined angle with respect to the support portion 22a.
  • the inclined directions of the pair of joint pieces 23 are opposite to each other but are at the same angle with respect to the central plane, and are line symmetrical.
  • the pair of joining pieces 23 is joined to the positive electrode mixture non-treated portion 41 c in a state where the electrode group 40 is opened in a V-shape at the center of the hollow portion 40 a.
  • the negative electrode current collector 31 is made of copper, but has the same structure as the positive electrode current collector 21.
  • the negative electrode current collector 31 has a support 32a which is attached to the battery cover 3 and is bent at approximately 90 degrees.
  • the bent support portion 32a is bifurcated at an end to form a pair of flat joint pieces 33.
  • Each joint piece 33 is joined to the electrode group 40 by ultrasonic welding.
  • the inclined directions of the pair of joint pieces 33 are opposite to each other but are at the same angle with respect to the central plane, and are line symmetrical.
  • the pair of joining pieces 23 is joined by ultrasonic welding to the positive electrode mixture non-treated portion 41 c in a state where the electrode group 40 is opened in a V shape at the center of the hollow portion 40 a.
  • FIG. 4 is an enlarged perspective view of the battery cover 3 illustrated in FIG. 1 taken along line IV-IV.
  • the safety valve integrated type battery cover 3 is manufactured as follows. A flat plate made of aluminum is pressed to form a recess 18 and a thin film safety valve 13 is formed at the bottom of the recess 18. That is, the battery cover 3 is configured as an integrated member of the base 12 forming the upper part of the battery cover 3, and the peripheral wall 14 connected to the base 12 and the thin film safety valve 13 connected to the peripheral wall 14. Ru. In this case, a space formed by the inner peripheral surface 14 a of the peripheral wall portion 14 and the upper surface 13 a of the safety valve 13 is a recess 18.
  • the depth D of the recess 18 is a dimension from the upper surface 12 a of the base 12 to the upper surface 13 a of the safety valve 13.
  • the safety valve 13 is formed to be flat as a whole.
  • the depth D of the recess 18 is formed larger than the thickness (plate thickness) T of the base 12.
  • the upper surface 13 a of the safety valve 13 is formed below the lower surface 12 b of the base 12.
  • the safety valve 13 has a substantially circular shape in plan view.
  • the thickness t of the safety valve 13 is thinner than the thickness (plate thickness) T of the base 12, and the upper surface 13 a of the safety valve 13 is formed with a groove 15 that is split by gas pressure generated inside the storage battery 1.
  • FIG. 5 shows a cross-sectional view of a structure in which a connecting pipe 81 connected to an exhaust duct for exhausting gas is attached to the upper part of the safety valve 13 of the battery lid 3.
  • the connecting pipe 81 is a tubular member having a hollow portion, and a connecting end 82 having a small outer diameter is formed on the tip end side.
  • the connection end 82 is fixed to the inner peripheral surface of the peripheral wall 14 of the battery lid 3 by press fitting or the like.
  • the height of the connection end 82 is determined such that a gap is provided between the end surface 82 b of the connection end 82 and the upper surface 13 a of the safety valve 13 with the step 82 a in contact with the upper surface 12 a of the base 12 There is.
  • the connection pipe 81 is attached by pressing the connection pipe 81 into the inner peripheral surface of the peripheral wall portion 14 and pushing the connection pipe 81 toward the safety valve 13 until the step 82a abuts on the upper surface 12a of the base 12. .
  • the planar safety valve 13 is provided at the bottom of the recess 18, that is, at the lower part of the inner peripheral surface 14 a of the peripheral wall 14 forming the recess 18, and the upper surface 13 a of the safety valve 13 is It is formed at a position lower than the lower surface 12b. Further, as described above, the height of the connecting pipe 81 press-fit into the inner peripheral surface 14 a of the peripheral wall portion 14 becomes a dimension exceeding the thickness of the base 12, and the connecting pipe 81 becomes the inner peripheral surface 14 a of the peripheral wall portion 14 The contact length is a dimension exceeding the thickness of the base 12.
  • the external force is a pressing force from the connection end 82 to the inner peripheral surface 14a of the peripheral wall 14 It is transmitted as X. Since the connection end 82 contacts the entire area in the depth direction of the inner peripheral surface 14 a of the peripheral wall portion 14, the pressing force X is supported by the entire thickness (plate thickness) T of the base 12. If the depth D of the recess 18 of the safety valve 13 is smaller than the thickness (plate thickness) T of the base 12 of the battery lid 3, the pressing force X is smaller than the thickness (plate thickness) T Will support. In such a state, the supporting force of the pressing force X is small, and a defect such as damage to the peripheral wall 14 is likely to occur.
  • the pressing force X is supported by the inner peripheral surface 14 a of the inner wall portion 14 corresponding to the entire surface of the thickness (plate thickness) T of the base 12. Therefore, the supporting force by the peripheral wall portion 14 with respect to the pressing force X can be made large.
  • each of the height of the connection end 82 and the depth D of the recess 18, that is, the dimension from the upper surface 12 a of the base 12 to the upper surface 13 a of the safety valve 13 is the thickness (plate thickness) of the base 12
  • FIG. 6A and 6B are cross-sectional views for explaining a method of forming the safety valve 13.
  • FIG. 6A a lower mold 91 having a cylindrical hollow portion 91a having the same diameter as the outer peripheral surface of the peripheral wall portion 14 is prepared.
  • the battery lid material 3A made of, for example, a metal plate of aluminum is placed on the lower mold 91.
  • the plate thickness of the battery lid material 3A is, for example, about 1.5 mm.
  • the height of the step of the hollow portion 91a of the lower mold 91 is preferably 1.6 mm or more to about twice the thickness of the battery lid material 3A, that is, about 3.0 mm.
  • the axial center is made to coincide with the hollow portion 91a, and a portion corresponding to the hollow portion 91a of the battery cover material 3A is pressed by the upper die 92 having an outer diameter smaller than the outer diameter of the hollow portion 91a.
  • a thin portion 13A and a peripheral wall portion 14 thinner than the thickness of the battery lid material 3A are formed.
  • the volume V of a length L corresponding to the hollow portion 91a of the battery lid material 3A before pressing is the total volume V of the volume of the peripheral wall 14 and the volume of the thin portion 13A after pressing. be equivalent to.
  • the thickness of the thin portion 13A is, for example, about 0.1 mm to 0.3 mm.
  • the safety valve 13 is formed by forming the groove 15 in the thin portion 13A with a press or the like.
  • the depth of the groove 15 is, for example, about 0.05 mm.
  • the liquid injection port 11 and the like are formed in the battery lid material 3A, whereby the battery lid 3 is manufactured.
  • the injection port 11 may be formed before forming the safety valve 13.
  • the upper surface 13a of the safety valve 13 is formed at a lower position than the lower surface 12b of the base 12.
  • the depth D of the recess 18 is larger than the thickness (plate thickness) T of the base 12 It is done. Accordingly, in the structure in which the connecting pipe 81 is attached to the peripheral wall portion 14 connected to the base 12, a large attachment strength can be obtained.
  • the connecting pipe 81 of the duct can be attached to the inner circumferential surface 14a of the peripheral wall portion 14 by press-fitting, the attaching structure can be simplified, and the sealing performance of the duct can be enhanced.
  • connection end 82 of the connection tube 81 and the battery cover 3 can be increased by increasing the height of the connection end 82 and the height of the peripheral wall 14, but the peripheral wall 14 The strength of the peripheral wall 14 against the press-fit of the connection end 82 is maintained substantially the same even if the height of For this reason, it is easy to ensure appropriate sealing performance by changing the height of the peripheral wall portion 14.
  • the connection end 82 of the connecting pipe 81 is thin. It does not contact the safety valve 13 which is the Therefore, the contact of the connection end 82 can prevent the safety valve 13 from being damaged.
  • the safety valve 13 Since the safety valve 13 is formed at a lower position than the upper surface 12a of the base 12 of the battery lid 3, the deformation of the safety valve 13 when the battery lid 3 is deformed can be made small.
  • FIG. 7 is a cross-sectional view showing the attachment structure of the battery cover and the duct according to Embodiment 2 of the present invention.
  • the second embodiment differs from the first embodiment in that the outer peripheral surface 14b of the peripheral wall portion 14 is an inclined surface.
  • the outer peripheral surface 14 b of the peripheral wall portion 14 is formed as an inclined surface whose outer diameter gradually increases from the connecting portion with the safety valve 13 to the connecting portion with the base 12. Since the inner peripheral surface 14a of the peripheral wall 14 is substantially vertical, the thickness of the peripheral wall 14 gradually increases from the safety valve 13 side toward the base 12 side.
  • the connecting portion of the base 12 to the lower surface 12 b is formed thicker than the thickness of the base 12.
  • the thickness of the peripheral wall portion 14 is made larger than the thickness of the base portion 12 at the connection portion with the base portion 12, and the outer diameter of the outer peripheral surface 14 b of the peripheral wall portion 14 faces the safety valve 13 side.
  • the strength of the peripheral wall 14 against external force can be improved, and the stress applied to the peripheral wall 14 can be dispersed.
  • the same effects as in the first embodiment can be obtained.
  • the remaining structure is the same as that of the first embodiment, and the corresponding members are denoted by the same reference numerals and description thereof is omitted.
  • FIG. 8 is a cross-sectional view showing an attachment structure of a battery cover and a duct according to a third embodiment of the present invention.
  • the third embodiment is different from the first embodiment in that the connection pipe 81 is not formed with the connection end 82, and the connection pipe receiver (step portion) is formed between the periphery of the safety valve 13 and the peripheral wall 14 ) Is the point where it is formed.
  • the connecting pipe receiving portion 17 is formed as a step portion at the bottom of the inner peripheral surface of the peripheral wall portion 14. An end surface 81 a of the connecting pipe 81 is in contact with the upper surface of the connecting pipe receiving portion 17.
  • the connecting pipe 81 when the connecting pipe 81 is attached, the connecting pipe 81 is pressed into the inner peripheral surface of the peripheral wall portion 14, and the connecting pipe 81 is a safety valve 13 until the end face 81 a abuts on the upper surface of the connecting pipe receiving portion 17. You can push it to the side. For this reason, it is not necessary to form the connection end part 82 with a small outside diameter in the connecting pipe 81, and the structure of the connecting pipe 81 can be simplified. Also in the third embodiment, the same effects as in the first embodiment can be obtained. The remaining structure is the same as that of the first embodiment, and the corresponding members are denoted by the same reference numerals and description thereof is omitted.
  • the outer peripheral surface 14b of the peripheral wall portion 14 has an inclined surface whose outer shape gradually decreases toward the safety valve 13 side. It is also possible to provide a step portion at the bottom of the inner circumferential surface.
  • FIG. 9 is a cross-sectional view showing an attachment structure of a battery cover and a duct according to a fourth embodiment of the present invention.
  • the fourth embodiment is different from the first embodiment in that the lower end portion of the peripheral wall portion 14 is formed so as to protrude from the lower surface 13 b of the safety valve 13.
  • the peripheral wall portion 14 has a lower end portion 14 c that protrudes from the lower surface 13 b of the safety valve 13 to the side opposite to the base 12. Conversely, the safety valve 13 is sunk from the lower end portion 14 c of the peripheral wall portion 14.
  • the safety valve 13 it is possible to prevent the safety valve 13 from being damaged, for example, when the battery lids 3 are in contact with each other or the assembling jig collides with the safety valve 13 in an assembly process or transportation. Also in the fourth embodiment, the same effect as the first embodiment can be obtained.
  • the remaining structure is the same as that of the first embodiment, and the corresponding members are denoted by the same reference numerals and description thereof is omitted.
  • FIG. 10 is a cross-sectional view showing an attachment structure of a battery cover and a duct according to a fourth embodiment of the present invention.
  • the safety valve 13 is substantially flat, and the upper surface 13 a of the safety valve 13 is located below the lower surface 12 b of the base 12.
  • the safety valve 13 may not be flat, and the entire upper surface 13 a of the safety valve 13 may not be located below the lower surface 12 b of the base 12.
  • FIG. 10 shows an example of such an embodiment.
  • the safety valve 13 has a flat peripheral portion 13c on the side of the peripheral wall portion 14 and a central portion on the inner peripheral side of the peripheral portion 13c is curved in a dome shape. ing.
  • the safety valve 13 is formed substantially at the highest position even at the center.
  • the highest position of the safety valve 13 is located within the range of the upper surface 12 a and the lower surface 12 b of the base 12, in other words, within the thickness range of the base 12.
  • a groove 15 for cleavage is formed on the upper surface side of the safety valve 13 at the root portion and the central portion as in the first embodiment.
  • the flat peripheral edge 13 c connected to the peripheral wall 14 is located below the lower surface 12 b of the base 12, and the width of the peripheral edge 13 c corresponds to the connection end 82 of the connecting pipe 81.
  • the connection end 82 of the connection tube 81 is arranged in the area of the flat peripheral edge 13 c of the safety valve 13. Accordingly, the lower end surface of the connection end portion 82 of the connection pipe 81 can be disposed in the area of the peripheral portion 13 c in a state where the lower end surface does not abut on the upper surface 13 a of the safety valve 13.
  • the connecting end 82 can be held over the entire thickness of the base 12 by the circumferential side surface 12 c, and the supporting structure of the connecting pipe 81 having high strength as in the first to fourth embodiments. It can be done.
  • the safety valve 13 When the safety valve 13 is curved in a dome shape, the amount of deformation on the central side and the peripheral edge side of the safety valve 13 is equalized compared to when it is flat, so the variation in gas pressure when the safety valve 13 is split It can be made smaller and the reliability is improved.
  • the same effects as the first to fourth embodiments can be obtained in the other points.
  • the remaining structure is the same as that of the first embodiment, and the corresponding members are denoted by the same reference numerals and description thereof is omitted.
  • the flat safety valve 13 in the second to fourth embodiments can be replaced with the curved safety valve 13 of the fifth embodiment.
  • connection pipe 81 is illustrated as a structure attached to the battery lid 3 by press fitting or the like, but may be joined by adhesion, welding or the like.
  • a seal member may be interposed between the connection pipe 81 and the circumferential side surface 12 c of the battery cover 3.
  • the safety valve 13 is illustrated as a circle in a plan view, it is possible to appropriately deform and apply an elliptical shape, a polygonal shape, or the like.
  • the cleavage groove 15 may be formed on the lower surface 13 b side of the safety valve 13.
  • the present invention is also applicable to prismatic storage batteries using a water-soluble electrolyte, such as nickel hydrogen batteries or nickel cadmium batteries, and lead storage batteries.
  • the prismatic storage battery of the present invention can be variously modified and applied within the scope of the present invention.
  • the point is that the connecting portion between the safety valve 13 and the peripheral wall portion 14 is made from the lower surface 12b of the battery lid 3 The lower side should be

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
PCT/JP2012/063512 2011-05-31 2012-05-25 角形蓄電池 Ceased WO2012165338A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US14/119,549 US20140141293A1 (en) 2011-05-31 2012-05-25 Prismatic storage battery
EP12793524.5A EP2738836A4 (en) 2011-05-31 2012-05-25 Rectangular battery
CN201280026435.2A CN103597630B (zh) 2011-05-31 2012-05-25 方形蓄电池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011122732A JP5656745B2 (ja) 2011-05-31 2011-05-31 角形蓄電池
JP2011-122732 2011-05-31

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WO2012165338A1 true WO2012165338A1 (ja) 2012-12-06

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US (1) US20140141293A1 (enExample)
EP (1) EP2738836A4 (enExample)
JP (1) JP5656745B2 (enExample)
CN (1) CN103597630B (enExample)
WO (1) WO2012165338A1 (enExample)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013246908A (ja) * 2012-05-24 2013-12-09 Hitachi Ltd 非水電解質二次電池
CN105074960B (zh) 2013-04-16 2018-01-09 株式会社早出长野 电池壳体
JP6119989B2 (ja) * 2013-08-20 2017-04-26 株式会社豊田自動織機 蓄電装置
US20180097207A1 (en) * 2015-05-18 2018-04-05 Hitachi Automotive Systems, Ltd. Rectangular Secondary Battery
US10707464B2 (en) * 2015-09-21 2020-07-07 Ford Global Technologies, Llc Battery cell venting system for electrified vehicle batteries
KR102260826B1 (ko) 2016-09-06 2021-06-03 삼성에스디아이 주식회사 이차 전지
KR102283788B1 (ko) * 2016-09-21 2021-07-30 삼성에스디아이 주식회사 이차 전지
CN106784436A (zh) * 2016-11-28 2017-05-31 德阳九鼎智远知识产权运营有限公司 一种电池箱用盖体
KR101947986B1 (ko) * 2018-01-18 2019-05-31 (주)범천정밀 이차전지의 캡플레이트 안전변 제조방법과 제조장치, 그 안전변 제조방법을 이용한 캡플레이트 제조방법, 그 캡플레이트 제조방법으로 제조되는 이차전지용 캡플레이트
JP7040293B2 (ja) * 2018-05-28 2022-03-23 大日本印刷株式会社 電池
CN209104251U (zh) * 2018-11-22 2019-07-12 宁德时代新能源科技股份有限公司 二次电池
JP7234908B2 (ja) * 2019-11-26 2023-03-08 株式会社豊田自動織機 圧力調整弁構造及び蓄電モジュール
JP2022113312A (ja) 2021-01-25 2022-08-04 プライムプラネットエナジー＆ソリューションズ株式会社 ガス排出弁を備えた封口板及びそれを用いた二次電池
JP7325474B2 (ja) 2021-03-31 2023-08-14 プライムプラネットエナジー＆ソリューションズ株式会社 ガス排出弁を備えた封口板及びそれを用いた二次電池
CN116207436B (zh) * 2021-11-30 2025-02-18 宁德时代新能源科技股份有限公司 电池单体及其制造方法和设备、电池以及用电装置
WO2024262109A1 (ja) 2023-06-23 2024-12-26 ビークルエナジージャパン株式会社 電池

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11273640A (ja) * 1998-03-20 1999-10-08 Miyama Tool Kk 密閉型電池の封口板及びその製造方法
JP2002008615A (ja) * 2000-04-18 2002-01-11 Nec Mobile Energy Kk 密閉型電池
JP2002063888A (ja) * 2000-08-22 2002-02-28 Alps Electric Co Ltd 安全弁付密閉部品とその製造方法
JP2002231206A (ja) * 2001-02-01 2002-08-16 Alps Electric Co Ltd 安全弁付密閉部品とその製造方法
JP2005332700A (ja) 2004-05-20 2005-12-02 Toyota Motor Corp 缶型電池およびその製造方法
JP2008235082A (ja) * 2007-03-22 2008-10-02 Toyota Motor Corp 開口弁、蓋体、容体、及び容器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001325933A (ja) * 2000-05-16 2001-11-22 Alps Electric Co Ltd 電池用安全弁
JP2002367582A (ja) * 2001-06-05 2002-12-20 Nec Tokin Tochigi Ltd 密閉型電池
JP5204973B2 (ja) * 2006-12-21 2013-06-05 株式会社ゼロム 二次電池用安全弁構造及びその製造方法
JP5318356B2 (ja) * 2007-02-23 2013-10-16 三洋電機株式会社 非水電解質二次電池
CN201450038U (zh) * 2009-06-23 2010-05-05 王文林 新型锂电池盖的防爆阀结构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11273640A (ja) * 1998-03-20 1999-10-08 Miyama Tool Kk 密閉型電池の封口板及びその製造方法
JP2002008615A (ja) * 2000-04-18 2002-01-11 Nec Mobile Energy Kk 密閉型電池
JP2002063888A (ja) * 2000-08-22 2002-02-28 Alps Electric Co Ltd 安全弁付密閉部品とその製造方法
JP2002231206A (ja) * 2001-02-01 2002-08-16 Alps Electric Co Ltd 安全弁付密閉部品とその製造方法
JP2005332700A (ja) 2004-05-20 2005-12-02 Toyota Motor Corp 缶型電池およびその製造方法
JP2008235082A (ja) * 2007-03-22 2008-10-02 Toyota Motor Corp 開口弁、蓋体、容体、及び容器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2738836A4

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EP2738836A4 (en) 2015-04-22
US20140141293A1 (en) 2014-05-22
JP5656745B2 (ja) 2015-01-21
CN103597630B (zh) 2016-03-02
EP2738836A1 (en) 2014-06-04
JP2012252809A (ja) 2012-12-20
CN103597630A (zh) 2014-02-19

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