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WO2022109939A1 - 电化学装置及电子设备 - Google Patents

电化学装置及电子设备 Download PDF

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Publication number
WO2022109939A1
WO2022109939A1 PCT/CN2020/131837 CN2020131837W WO2022109939A1 WO 2022109939 A1 WO2022109939 A1 WO 2022109939A1 CN 2020131837 W CN2020131837 W CN 2020131837W WO 2022109939 A1 WO2022109939 A1 WO 2022109939A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrochemical device
electrode assembly
pole
electrically connected
liquid injection
Prior art date
Application number
PCT/CN2020/131837
Other languages
English (en)
French (fr)
Inventor
张弛
Original Assignee
宁德新能源科技有限公司
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 宁德新能源科技有限公司 filed Critical 宁德新能源科技有限公司
Priority to EP20962830.4A priority Critical patent/EP4254613A4/en
Priority to PCT/CN2020/131837 priority patent/WO2022109939A1/zh
Priority to CN202080009958.0A priority patent/CN113383456B/zh
Publication of WO2022109939A1 publication Critical patent/WO2022109939A1/zh
Priority to US18/321,967 priority patent/US20230299447A1/en

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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
    • 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
    • H01M50/655—Plugs specially adapted for venting
    • 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
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/153—Lids or covers characterised by their shape for button or coin 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01M50/545—Terminals formed by the casing of the 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
    • H01M50/60—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
    • 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
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button 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 application relates to electrochemical devices, in particular to an electrochemical device and electronic equipment.
  • TWS True Wireless Stereo, true wireless stereo
  • button-type lithium-ion batteries For coin-type lithium-ion batteries, it is very important to reduce the manufacturing cost of the cells, improve the production efficiency and ensure the reliability of the cells.
  • a liquid injection port is usually set at the edge of the case cover as a liquid injection channel.
  • the cell In the liquid injection process of cell preparation, the cell is mechanically positioned. After feeding the cell to the liquid injection equipment, it needs to be rotated at a certain angle to correct the angle of the liquid injection port before liquid injection can be performed.
  • the welding position of the sealing pin for sealing the liquid injection port may interfere with the welding edge of the shell cover, which increases the difficulty of processing.
  • an electrochemical device in a first aspect of the present application, includes a casing, an electrode assembly disposed in the casing, and an electrolyte.
  • the casing includes a casing body, a casing cover and a sealing plug which are covered with the casing body.
  • the housing body includes side walls.
  • the center of the shell cover is provided with a liquid injection port, and the sealing plug is used to seal the liquid injection port.
  • the first tab of the electrode assembly is electrically connected to the side wall
  • the second tab of the electrode assembly is electrically connected to the pole post provided on the side wall, and the pole post is insulated from the side wall.
  • the electrode assembly is a wound structure, and the axial direction of the electrode assembly is perpendicular to the case cover.
  • the electrode assembly is a laminated structure, and the pole piece of the electrode assembly is parallel to the case cover.
  • the sidewall includes a metal layer.
  • the metal layer is electrically connected to the first pole piece in the electrode assembly.
  • the side wall of the housing body is provided with a through hole.
  • the pole is arranged in the through hole. The first end of the pole protrudes from the through hole, and the second end of the pole is electrically connected with the second pole piece in the electrode assembly.
  • the sealing insulating member is arranged around the pole to separate the pole and the metal layer of the sidewall and seal the through hole.
  • the first pole piece is a negative pole piece
  • the second pole piece is a positive pole piece.
  • the electrochemical device also includes a positive transition conductor and a negative transition conductor.
  • the electrode assembly further includes: a plurality of positive electrode tabs and a plurality of negative electrode tabs. Each winding layer of the positive pole piece in the winding structure or each layer of the positive pole piece in the laminated structure is electrically connected to the first end of the positive electrode transfer conductor through a positive electrode tab, and the first end of the positive electrode transfer conductor is electrically connected. The two ends are electrically connected to the second end of the pole.
  • Each winding layer of the negative pole piece in the winding structure or each layer of the negative pole piece in the laminated structure is electrically connected to the first end of the negative electrode transfer conductor through a negative electrode tab, and the first end of the negative electrode transfer conductor is electrically connected. The two ends are electrically connected to the metal layer of the sidewall.
  • the liquid injection port includes a through hole serving as a liquid injection channel, and a first groove provided around the through hole.
  • the sealing plug includes a plug head and a plug cap, the plug head is adapted to the diameter of the through hole, and the plug cap is adapted to the first groove.
  • a side of the case cover close to the electrode assembly is further provided with a second groove communicating with the liquid injection port, and the second groove extends from the liquid injection port to between the case body and the electrode assembly Clearance.
  • the electrochemical device further includes: an explosion-proof valve, and the explosion-proof valve is arranged on the sealing plug.
  • the explosion-proof valve is a gap formed on the sealing plug, and the depth of the gap is smaller than the thickness of the sealing plug.
  • the side wall includes a first portion and a second portion.
  • the first part is a plane perpendicular to the shell cover, and the through hole is arranged in the first part.
  • the second portion forms a closed structure around the first portion.
  • an insulating gasket is provided on the bottom end face of the housing body.
  • a second aspect of the present application further provides an electronic device, wherein the electronic device includes the above electrochemical device.
  • the axial direction of the electrode assembly is arranged parallel to the shell cover, and the shell cover does not need to be provided with the electrochemical device.
  • Positive and negative electrodes so the liquid injection port can be set in the center of the case cover. In the liquid injection process, since the liquid injection port is set at the center of the shell cover, the equipment only needs to mechanically position the shell, and no longer needs to rely on vision to correct the angle of the liquid injection port, which can improve production efficiency.
  • the liquid injection port is set at the center of the case cover, so the distance between the edge of the liquid injection port and the edge of the case cover becomes larger.
  • the liquid injection port is sealed by welding the sealing plug, the joint position between the case cover and the shell body can be avoided. The risk of re-melting reduces the difficulty of processing, thereby reducing manufacturing costs and improving production efficiency.
  • FIG. 1 is a schematic structural diagram of an electrochemical device provided by some embodiments of the present application.
  • FIG. 2 is a schematic cross-sectional structure diagram of an electrochemical device provided by some embodiments of the present application.
  • Fig. 3 is a partial enlarged schematic view of the negative electrode tab of Fig. 2;
  • Fig. 4 is a partial enlarged schematic view of the positive electrode tab of Fig. 2;
  • FIG. 5 is a schematic structural diagram of a casing cover of the electrochemical device of the application.
  • FIG. 6 is a schematic cross-sectional structure diagram of the case cover of FIG. 5;
  • FIG. 7 is a schematic structural diagram of a sealing plug of the electrochemical device of the application.
  • FIG. 8 is a schematic structural diagram of another casing cover of the electrochemical device of the present application.
  • FIG. 9 is a schematic structural diagram of another sealing plug of the electrochemical device of the present application.
  • FIG. 1 is a schematic structural diagram of an electrochemical device of the present application.
  • FIG. 2 is a schematic cross-sectional structure diagram of an electrochemical device according to the present application.
  • FIG. 3 is a partial detail view of the negative electrode tab in FIG. 2 .
  • FIG. 4 is a partial detail view of the positive electrode tab of FIG. 2 .
  • an embodiment of the present application provides an electrochemical device, which includes a casing 11 , an electrode assembly 6 disposed in the casing 11 , and an electrolyte (not shown in the figure) .
  • the casing 11 includes a casing main body 5 , a casing cover 1 and a sealing plug 3 which are covered with the casing main body 5 .
  • the center of the casing cover 1 is provided with a liquid injection port 2 .
  • the sealing plug 3 is used to seal the liquid injection port 2 .
  • the housing body 5 includes a side wall 52 .
  • the first tab 8 of the electrode assembly is electrically connected to the side wall 52 .
  • the second tab 9 of the electrode assembly is electrically connected to the pole 4 disposed on the side wall 52 .
  • the pole 4 is insulated from the side wall 52 .
  • the electrolyte is injected from the injection port 2, and the electrode assembly 6 is immersed in the electrolyte.
  • the positive electrode and the negative electrode of the electrochemical device of the present application are arranged on the side of the casing 11, the axial direction AA' of the electrode assembly 6 is arranged parallel to the casing cover 1, and the current is drawn from the side of the electrochemical device, and the liquid injection port 2 can be Set at the center of the cover 1 .
  • the center of the cover 1 refers to the geometric center of the cover 1 . If the shape of the case cover 1 is a center symmetrical figure, the center of the case cover 1 refers to the center of symmetry of the case cover 1 . For example, when the cover 1 is circular, the center of the cover 1 refers to the center of the circle; when the cover 1 is square or rectangular, the center of the cover 1 refers to the intersection of two diagonal lines of the square or rectangle.
  • the case cover 1 is a substantially circular case cover, and the liquid injection port 2 is located at the center of the substantially circular case cover.
  • the case cover 1 can also be in other shapes such as square, rectangle, etc., and the liquid injection port 2 is located at the geometric center of the case cover 1 in these shapes.
  • the center of the shell cover 1 is provided with a liquid injection port 2, which means that the liquid injection port 2 is arranged concentrically with the center of the shell cover 1, or the liquid injection port 2 and the center of the shell cover 1 maintain a certain concentricity.
  • the specific value of the concentricity is given by
  • the liquid injection head of the liquid injection device can be aligned with the liquid injection port 2 on the shell cover 1 by satisfying the following one-time mechanical positioning, and it is no longer necessary to adjust the position of the casing 11 or rotate the casing 11 for angle correction.
  • the equipment since the liquid injection port 2 is set at the center of the shell cover 1, the equipment only needs to perform a mechanical positioning of the shell 11 once, and does not need to rely on vision to perform the liquid injection head and the liquid injection port 2. Angle correction can improve production efficiency.
  • the liquid injection port 2 is arranged at the center of the case cover 1, and the distance between the edge of the liquid injection port 2 and the edge of the case cover 1 is increased. When the liquid injection port 2 is sealed by welding, the case cover 1 and the shell can be avoided The joint position of the main body 5 generates the risk of re-melting, which reduces the difficulty of processing, thereby reducing the manufacturing cost and improving the production efficiency.
  • the concentricity between the liquid injection port 2 and the center of the case cover 1 is maintained within a preset error range. In the liquid injection process, the liquid injection process only needs to mechanically position the case 11 with the case cover 1 to perform liquid injection.
  • a certain deviation between the liquid injection port 2 and the center of the casing cover 1 is allowed, but the magnitude of the deviation is related to the size of the liquid injection head of the liquid injection device and the diameter of the liquid injection port 2 .
  • the electrode assembly 6 may be a wound structure or a laminated structure.
  • the electrode assembly 6 is arranged so that the axial direction (AA') of the electrode assembly is parallel to the case cover 1 .
  • the electrode assembly 6 has a laminated structure, the electrode assembly 6 is arranged such that the pole piece of the electrode assembly is parallel to the case cover 1 , and the axial direction of the electrode assembly is perpendicular to the pole piece of the electrode assembly.
  • the electrochemical device further includes transition conductors 8 and 10 through which the first pole piece and the second pole piece of the electrode assembly are connected to the sidewalls 52 and 52 of the casing respectively through the transition conductors 8 and 10 .
  • the poles 4 are connected, and the transition conductors 8 and 10 are arranged between the electrode assembly 6 and the side wall 52 of the casing 11 .
  • a positive pole is arranged in the center of the case cover 1 , and the electrode assembly 6 of a wound structure or a laminated structure is drawn out from the top near the case cover 1 . Since the positive pole is arranged in the center of the case cover 1, the liquid injection port can only be arranged on the edge of the case cover 1 or the bottom of the case 11, which is not conducive to the liquid injection operation.
  • the positive electrode and the negative electrode are arranged on the side of the casing, the electrode assembly 6 is in a winding structure, and the axial direction of the winding structure is generally parallel to the casing cover 1 (or, the electrode assembly 6 For the stacked structure, the stacked pole pieces are arranged substantially parallel to the case cover 1).
  • the lead-out side of the tab of the electrode assembly 6 is close to the side wall 52 of the case body 5 , and is electrically connected to the side wall 52 of the case body 5 and the pole 4 nearby.
  • the positive pole can be arranged on the side wall 52 of the case body 5 and insulated from the side wall 52 , so that the liquid injection port 2 can be arranged in the center of the case cover 1 .
  • the housing body 5 includes a metal layer or sidewall 52 made of metal.
  • the housing body 5 may also be a metal housing body 5, such as a steel housing.
  • the metal layer of the case body 5 or the case body 5 made of metal is electrically connected to the first pole piece in the electrode assembly 6 .
  • the side wall 52 of the housing main body 5 is provided with a through hole 50 , and the pole 4 is arranged in the through hole 50 .
  • the first end of the pole 4 protrudes from the through hole 50 , and the second end of the pole 4 is electrically connected to the second pole piece in the electrode assembly 6 .
  • the sealing insulating member 12 is disposed around the pole 4 to separate the pole 4 and the metal layer of the casing body 5 or the casing body 5 made of metal, and seal the through hole 50 .
  • the sealing insulator 12 may be a rubber sealing ring.
  • the first pole piece is a negative pole piece
  • the second pole piece is a positive pole piece.
  • the case body 5 shown in FIGS. 2-4 is a case body 5 made of metal, and is electrically connected to the negative electrode piece in the electrode assembly 6 .
  • the case body 5 made of metal is the negative electrode of the electrochemical device.
  • the pole 4 is electrically connected to the positive pole piece in the electrode assembly 6, and the pole 4 is a positive pole.
  • the transfer conductor includes a positive transfer conductor 10 and a negative transfer conductor 8 ;
  • the electrode assembly 6 further includes: a plurality of negative electrode tabs 7 and a plurality of positive electrode tabs 9 .
  • each winding layer of the negative electrode piece is electrically connected to the first end of the negative electrode transfer conductor 8 through a negative electrode tab 7, and the first end of the negative electrode transfer conductor 8 is electrically connected.
  • the two ends are connected to the metal shell body 5 ; each winding layer of the positive electrode piece is electrically connected to the first end of the positive electrode transfer conductor 10 through a positive electrode tab 9 , and the second end of the positive electrode transfer conductor 10 is electrically connected.
  • the terminal is electrically connected to the pole 4 .
  • each layer of negative electrode pole pieces in the laminated structure is electrically connected to the first end of the negative electrode transfer conductor 8 through a negative electrode tab 7, and the second end of the negative electrode transfer conductor 8 is electrically connected to the first end of the negative electrode transfer conductor 8.
  • a metallic housing body 5 is connected.
  • Each layer of positive electrode pieces in the stacked structure is electrically connected to the first end of the positive electrode transfer conductor 10 through a positive electrode tab 9 , and the second end of the positive electrode transfer conductor 10 is electrically connected to the pole 4 .
  • each winding layer of the negative pole piece or each layer of the negative pole piece of the stacking mechanism leads out one Negative electrode tabs 7 , a plurality of negative electrode tabs 7 are stacked and bent, and are electrically connected to the first end of the negative electrode transfer conductor 8 .
  • Each winding layer of the positive pole piece or each layer of the positive pole piece of the stacking mechanism leads out a positive pole tab 9, and a plurality of positive pole tabs 9 are stacked, and after bending, the first end of the conductor 10 is connected to the positive pole. electrical connection.
  • a gap 100 is left on the left and right side walls 52 of the housing main body 5, and the gap width is about 1-3 mm.
  • the gap 100 can be used not only to set the connection structure of the transfer conductor, the tabs and the transfer conductor, but also to ensure the fluidity of the electrolyte during injection and the wettability of the electrolyte to each winding layer of the electrode assembly 6 .
  • a tab protective glue 15 is attached at the end (the end connected to the negative electrode transfer conductor 8) close to the outer side of the casing 11.
  • a tab protective glue 15 is attached to the end (the end connected to the positive electrode transfer conductor 10 ) close to the outer side of the casing 11 .
  • the tab protection glue 15 also plays an insulating role.
  • the above-mentioned housing body 5 may include a bottom end face 51 and a side wall 52 .
  • An insulating gasket 13 is provided on the bottom end face 51 of the housing body 5 .
  • the insulating spacer 13 is provided between the electrode assembly 6 and the case body 5 .
  • the side wall 52 exemplarily includes a first part 521 and a second part 522 , the first part 521 is a plane perpendicular to the case cover 1 , and the through hole 50 is provided in the first part 521 ; the second part 522 surrounds the first part 521 .
  • a portion 521 forms a closed structure.
  • FIG. 5 is a schematic structural diagram of a case cover of the electrochemical device of the present application.
  • FIG. 6 is a schematic cross-sectional structural diagram of the case cover of FIG. 5 .
  • FIG. 7 is a schematic view of the structure of the sealing plug.
  • the liquid injection port 2 of the electrochemical device is designed as a countersunk hole, and the sealing plug 3 can be arranged in the countersunk hole, which can prevent the sealing plug 3 from occupying the head space of the electrochemical device.
  • the energy density can be increased.
  • the liquid injection port 2 includes a through hole 21 serving as a liquid injection channel and a first groove 22 provided around the through hole 21 .
  • the first groove 22 may be formed by pressing and forming the top edge of the through hole 21 by sinking.
  • the top edge of the through hole 21 refers to the edge of the through hole 21 on the side of the case cover 1 away from the electrode assembly 6 .
  • the sealing plug 3 includes a plug head 31 and a plug cap 32 , the plug head 31 is adapted to the diameter of the through hole 21 , and the plug cap 32 is adapted to the first groove 22 .
  • the sealing plug 3 is assembled on the case cover 1 , and the upper surface of the sealing plug 3 and the upper surface of the case cover are substantially on the same plane.
  • FIG. 8 is a schematic structural diagram of a side of another casing cover of the electrochemical device of the present application, which is close to the electrode assembly.
  • the side of the case cover 1 of the electrochemical device close to the electrode assembly is further provided with a second groove 23 communicating with the liquid injection port 2 , and the second groove 23 extends from the liquid injection port 2 to the case cover 1 . edge extension.
  • the second groove 23 includes a first concave portion, the first concave portion is distributed around the liquid injection port 2 , and the second groove 23 further includes extending from the first concave portion to above the gap 100 between the case cover 1 and the electrode assembly 6 .
  • the side of the shell cover 1 close to the electrode assembly is provided with a second groove 23 that communicates with the liquid injection port 2.
  • the electrolyte can flow along the second groove to the side wall 52 of the casing 11, and along the side wall of the casing 11.
  • the side wall 52 flows downward to facilitate liquid injection.
  • Fig. 9 is a schematic structural diagram of another sealing plug with an explosion-proof valve of the electrochemical device of the present application.
  • General electrochemical devices also include explosion-proof valves.
  • the gas inside the battery expands, and the internal pressure of the battery increases.
  • the explosion-proof valve opens, and the gas is released to release the pressure, thereby preventing the battery from exploding.
  • the explosion-proof valve of the electrochemical device of the present application may be provided on the sealing plug 3 .
  • the explosion-proof valve 30 may be a slit scribed on the sealing plug 3 , and the depth of the slit is smaller than the thickness of the sealing plug 3 .
  • the sealing plug 3 in the shape shown in FIG. 7 can be made of metal, and a gap through the thickness of the sealing plug 3 is formed inside the sealing plug 3 by laser etching. This gap is the explosion-proof valve 30 .
  • Various shapes and depths of explosion valve 30 may exist. When the internal pressure of the cell reaches a certain level, it will be cracked due to stress concentration to achieve the purpose of pressure relief.
  • the sealing plug 3 is welded to the liquid injection port 2 by laser welding, and the sealing of the liquid injection port 2 is completed.
  • the explosion-proof valve 30 is etched on the inner side of the case cover 1, it is necessary to distinguish the front and back sides of the case cover 1 before etching.
  • the case cover 1 may be reversely assembled, which causes the side with the explosion-proof valve 30 etched to face outward, so that the explosion-proof valve 30 cannot function as a pressure relief.
  • the explosion-proof valve 30 is arranged on the inner side of the sealing plug 3, and the sealing plug 3 does not have the situation that the front and back of the sealing plug 3 are assembled reversely, which can avoid the risk of failure of the explosion-proof valve caused by the wrong assembly direction.
  • a liquid injection port is arranged in the center of the shell cover, and only one positioning is required for liquid injection.
  • the liquid injection port can be designed with countersunk holes.
  • the liquid injection port can be sealed with a sealing plug with an explosion-proof valve etched on the inside, which is simple in processing and high in assembly efficiency.
  • the present application also provides an electronic device, including the electrochemical device described in any one of the above.

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Abstract

一种电化学装置，包括壳体、设置于壳体内的电极组件和电解液。其中，壳体包括壳体主体，与壳体主体盖合的壳盖和密封塞，壳盖的中心设置有注液口，密封塞用于密封注液口。壳体主体包括侧壁。电极组件的第一极耳电连接该侧壁。电极组件的第二极耳电连接设置在侧壁上的极柱。极柱与侧壁绝缘设置。

Description

电化学装置及电子设备 技术领域
本申请涉及电化学装置，具体涉及一种电化学装置及电子设备。
背景技术
TWS(True Wireless Stereo，真正无线立体)耳机行业的高速发展，带动了扣式锂离子电池的需求提升。对扣式锂离子电池而言，降低电芯制造成本，提高生产效率并保证电芯的可靠性至关重要。
现有扣式锂离子的电芯通常在壳盖边缘设置注液口作为注液通道。电芯制备注液工序中，电芯机械定位，上料到注液设备后，还需要转动一定角度，进行注液口角度纠偏，才能进行注液。另外，用于密封注液口的密封钉的焊接位置与壳盖的焊接边缘可能产生干涉，导致加工难度增加。
发明内容
本申请的第一方面，提供一种电化学装置，该电化学装置包括壳体、设置于壳体内的电极组件和电解液。其中，壳体包括壳体主体，与壳体主体盖合的壳盖和密封塞。壳体主体包括侧壁。壳盖的中心设置有注液口，密封塞用于密封注液口。其中，电极组件的第一极耳电连接侧壁，电极组件的第二极耳电连接设置在侧壁上的极柱，极柱与侧壁绝缘设置。
在本申请的一实施方式中，电极组件为卷绕结构，电极组件的轴向垂直于壳盖。或者，电极组件为层叠结构，电极组件的极片平行于壳盖。
在本申请的一实施方式中，所述侧壁包括金属层。金属层与电极组件中的第一极片电连接。壳体主体的侧壁设置有通孔。极柱设置于通孔内。极柱的第一端自通孔伸出，极柱的第二端与电极组件中的第 二极片电连接。密封绝缘件围绕极柱设置，以隔开极柱和侧壁的金属层，并密封通孔。
在本申请的一实施方式中，第一极片为负极极片，第二极片为正极极片。电化学装置还包括正极转接导电体和负极转接导电体。电极组件还包括：多个正极极耳、多个负极极耳。卷绕结构中正极极片的每一卷绕层或层叠结构中的每一层正极极片均通过一个正极极耳与正极转接导电体的第一端电连接，正极转接导电体的第二端与极柱的第二端电连接。卷绕结构中负极极片的每一卷绕层或层叠结构中的每一层负极极片均通过一个负极极耳与负极转接导电体的第一端电连接，负极转接导电体的第二端与侧壁的金属层电连接。
在本申请的一实施方式中，注液口包括作为注液通道的通孔，和围绕通孔设置的第一凹槽。密封塞包括塞头和塞帽，塞头与通孔的直径适配，塞帽与第一凹槽适配。
在本申请的一实施方式中，壳盖的靠近电极组件的一侧还设置有与注液口连通的第二凹槽，第二凹槽从注液口延伸至壳体主体与电极组件之间的间隙。
在本申请的一实施方式中，电化学装置还包括：防爆阀，防爆阀设置在密封塞上。
在本申请的一实施方式中，防爆阀为形成在密封塞上的缝隙，缝隙深度小于密封塞的厚度。
在本申请的一实施方式中，侧壁包括第一部分和第二部分。第一部分为与壳盖垂直的平面，通孔设置在第一部分。第二部分围绕第一部分形成闭合结构。
在本申请的一实施方式中，壳体主体的底部端面上设置有绝缘垫片。
本申请的第二方面，还提供一种电子设备，其中，所述电子设备包括上述的电化学装置。
有益效果
因本申请的电化学装置的壳体的侧壁、与侧壁绝缘的极柱分别作为电化学装置的正负极，电极组件的轴向平行于壳盖设置，壳盖无需 设置电化学装置的正负极，因此可以将注液口设置于壳盖中心位置。在注液工序中，由于注液口设置于壳盖中心位置，设备只需对壳体进行机械定位，无需再依靠视觉进行注液口角度纠偏，可以提高生产效率。另外，注液口设置于壳盖中心位置，因而注液口边缘与壳盖边缘的距离变大，通过焊接密封塞对注液口进行密封时，可以避免壳盖与壳体主体的结合位置产生再次熔化的风险，降低加工难度，因而可以降低制造成本，提高生产效率。
附图说明
图1为本申请的一些实施例提供的一种电化学装置的结构示意图；
图2为本申请的一些实施例提供的一种电化学装置的剖面结构示意图；
图3为图2的负极极耳处的局部放大示意图；
图4为图2的正极极耳处的局部放大示意图；
图5为本申请的电化学装置的一种壳盖的结构示意图；
图6为图5的壳盖的剖面结构示意图；
图7为本申请的电化学装置的一种密封塞的结构示意图；
图8为本申请的电化学装置的另一种壳盖的结构示意图；
图9为本申请的电化学装置的另一种密封塞的结构示意图。
本申请的实施方式
下面将结合本申请实施例中的附图，对本申请所提供的各个示例性的实施例的技术方案进行清楚、完整地描述。在不冲突的情况下，下述各个实施例及其技术特征可以相互组合。
本申请提到的方向用语，例如上、下、顶部、底部、前、后、左、右、内、外侧、中心、水平、横向、垂直、纵向、轴向、径向、最上层或最下层等，仅是参考附图的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。
下面叙述虽然以纽扣电池为例对本申请的技术方案进行说明，但本领域技术人员应当理解，本申请技术方案还可以应用其它硬质壳体的电化学装置。
图1为本申请的一种电化学装置的结构示意图。图2为本申请的一种电化学装置的剖面结构示意图。图3为图2中负极极耳处的局部细节图。图4为图2的正极极耳处的局部细节图。
如图1和图2所示，本申请的实施例提供一种电化学装置，该电化学装置包括壳体11、设置于壳体11内的电极组件6和电解液(图中未示出)。其中，壳体11包括壳体主体5，与壳体主体5盖合的壳盖1和密封塞3。壳盖1的中心设置有注液口2。密封塞3用于密封注液口2。壳体主体5包括侧壁52。电极组件的第一极耳8电连接该侧壁52。电极组件的第二极耳9电连接设置在侧壁52上的极柱4。极柱4与侧壁52绝缘设置。
电解液自注液口2注入，电极组件6浸入在电解液中。本申请的电化学装置的正极和负极设置在壳体11的侧面，电极组件6的轴向A－A’平行于壳盖1设置，采用从电化学装置的侧面引出电流，注液口2可以设置于壳盖1中心位置。
对于规则形状的壳盖1，壳盖1的中心指壳盖1的几何中心。如果壳盖1的形状为中心对称图形，则壳盖1的中心指壳盖1的对称中心。例如，壳盖1为圆形时，壳盖1的中心指圆形的圆心；壳盖1为正方形或长方形时，壳盖1的中心指正方形或长方形的两条对角线的交点。
在一些实施例中，壳盖1为大体上圆形的壳盖，注液口2位于大体上圆形的壳盖的圆心。在另一些实施例中，壳盖1也可以为正方形、长方形等其它形状，注液口2位于该些形状的壳盖1的几何中心。
壳盖1的中心设置有注液口2，指注液口2与壳盖1的中心同心设置，或者注液口2与壳盖1的中心的保持一定的同心度，同心度的具体数值 以能满足下述的一次机械定位即可使注液设备的注液头与壳盖1上的注液口2对齐，而不再需要继续调整壳体11的位置或旋转壳体11进行角度纠偏。
在电化学装置制造的注液工序中，因注液口2设置于壳盖1中心位置，设备只需对壳体11进行一次机械定位，无需再依靠视觉进行注液头与注液口2的角度纠偏，可以提高生产效率。另外，注液口2设置于壳盖1的中心位置，注液口2的边缘与壳盖1边缘的距离变大， 通过焊接对注液口2进行密封时，可以避免壳盖1与壳体主体5的结合位置产生再次熔化的风险，降低加工难度，因而可以降低制造成本，提高生产效率。注液口2与壳盖1的中心的保持预设误差范围内的同心度，注液工序中只需要对带有壳盖1的壳体11进行机械定位即可进行注液。
具体实施时，允许注液口2与壳盖1的中心存在一定的偏差，但该偏差的大小与注液设备的注液头的尺寸和注液口2的直径相关。
在一些实施例中，电极组件6可以为卷绕结构或层叠结构。电极组件6为卷绕结构时，电极组件6设置为电极组件的轴向(A－A’)平行于壳盖1。电极组件6为层叠结构时，电极组件6设置为电极组件的极片平行于壳盖1，电极组件的轴向垂直于电极组件的极片。
在一些实施例中，所述电化学装置还包括转接导电体8、10，电极组件的第一极片和第二极片通过转接导电体8、10分别与壳体的侧壁52和极柱4相连，转接导电体8、10设置在电极组件6和壳体11的侧壁52之间。
在目前的一些纽扣电池中，壳盖1的中心位置设置正极柱，卷绕结构或层叠结构的电极组件6从靠近壳盖1的顶部引出。由于壳盖1中心位置设置正极柱，注液口只能设置在壳盖1边缘或者壳体11的底部，不利于注液操作。针对上述问题，本申请的电化学装置将正极和负极设置于壳体的侧面，电极组件6为卷绕结构，且卷绕结构的轴向与壳盖1大体上平行设置(或者，电极组件6为层叠结构，层叠设置的极片与壳盖1大体上平行设置)。这样，电极组件6的极耳引出侧靠近壳体主体5的侧壁52，就近与壳体主体5的侧壁52和极柱4电连接。这样，可以将正极柱设置于壳体主体5的侧壁52上并与侧壁52绝缘，从而使注液口2可以设置在壳盖1的中心位置。
在一些实施例中，壳体主体5包括金属层或者由金属制成的侧壁52。壳体主体5也可以为金属制成的壳体主体5，例如钢质壳体。壳体主体5的金属层或金属制成的壳体主体5，与电极组件6中的第一极片电连接。壳体主体5的侧壁52设置有通孔50，极柱4设置于通孔50内。极柱4的第一端自通孔50伸出，极柱4的第二端与电极组件6中 的第二极片电连接。密封绝缘件12围绕极柱4设置，以隔开极柱4和壳体主体5的金属层或金属制成的壳体主体5，并密封通孔50。示例性地，密封绝缘件12可以为橡胶密封圈。
在一些实施例中，第一极片为负极极片，第二极片为正极极片。图2－图4中所示的壳体主体5为金属制成的壳体主体5，并与电极组件6中的负极极片电连接。金属制成的壳体主体5为电化学装置的负极。极柱4与电极组件6中的正极极片电连接，极柱4为正极极柱。具体地，转接导电体包括正极转接导电体10和负极转接导电体8；电极组件6还包括：多个负极极耳7，多个正极极耳9。如果电极组件6是卷绕结构的电极组件，负极极片的每一卷绕层均通过一个负极极耳7与负极转接导电体8的第一端电连接，负极转接导电体8的第二端与金属的壳体主体5连接；正极极片的每一卷绕层均通过一个正极极耳9与正极转接导电体10的第一端电连接，正极转接导电体10的第二端与极柱4电连接。
当然，上述方案也适用于层叠结构的电极组件。电极组件6是层叠结构时，层叠结构中的每一层负极极片均通过一个负极极耳7与负极转接导电体8的第一端电连接，负极转接导电体8的第二端与金属的壳体主体5连接。层叠结构中的每一层正极极片均通过一个正极极耳9与正极转接导电体10的第一端电连接，正极转接导电体10的第二端与极柱4电连接。
如图2－图4所示，电极组件6的极耳引出侧与壳体主体5的侧壁52相对，负极极片的每一卷绕层或者层叠机构的每一层负极极片都引出一个负极极耳7，多个负极极耳7层叠并弯折后与负极转接导电体8的第一端电连接。正极极片的每一卷绕层或者层叠机构的每一层正极极片都引出一个正极极耳9，多个正极极耳9层叠，并弯折后与正极转接导电体10的第一端电连接。壳体主体5的左、右两侧壁52留出间隙100，间隙宽度约1～3mm。间隙100既可以用来设置转接导电体、极耳与转接导电体的连接结构，也可以保证注液时电解液的流动性及电解液对电极组件6各卷绕层的浸润性。
另外，如图3所示，多个负极极耳7层叠后在末端(与负极转接 导电体8连接的一端)靠近壳体11的外侧还贴附有极耳保护胶15。多个正极极耳10层叠后在末端(与正极转接导电体10连接的一端)靠近壳体11的外侧还贴附有极耳保护胶15。极耳保护胶15同时也起绝缘作用。上述壳体主体5可以包括底部端面51和侧壁52。壳体主体5的底部端面51上设置有绝缘垫片13。绝缘垫片13设置在电极组件6与壳体主体5之间。如图1所示，示例性地，侧壁52包括第一部分521和第二部分522，第一部分521为与壳盖1垂直的平面，通孔50设置在第一部分521；第二部分522围绕第一部分521形成闭合结构。
图5为本申请的电化学装置的一种壳盖的结构示意图。图6为图5的壳盖的剖面结构示意图。图7为密封塞的结构示意图。
在一些实施例中，电化学装置的注液口2设计为埋头孔，密封塞3可以设置在埋头孔中，可以避免密封塞3占用电化学装置的顶部空间，在多个电化学装置组成大容量的电池时，可以增加能量密度。
如图6所示，注液口2包括作为注液通道的通孔21和围绕通孔21设置的第一凹槽22。第一凹槽22可以通过压制成型，使通孔21的顶部边缘下沉形成。通孔21的顶部边缘指通孔21的位于壳盖1的远离电极组件6一侧的边缘。如图6和图7所示，密封塞3包括塞头31和塞帽32，塞头31与通孔21的直径适配，塞帽32与第一凹槽22适配。在一些实施例中，注入电解液后，密封塞3装配于壳盖1，密封塞3的上表面与壳盖的上表面大体位于同一平面。
图8为本申请的电化学装置的另一种壳盖的靠近电极组件的一侧的结构示意图。
如图8所示，电化学装置的壳盖1的靠近电极组件的一侧还设置有与注液口2连通的第二凹槽23，第二凹槽23从注液口2向壳盖1的边缘延伸。优选地，第二凹槽23包括第一凹部，第一凹部分布在注液口2的周围，第二凹槽23还包括从第一凹部延伸到壳盖1与电极组件6的间隙100的上方。壳盖1的靠近电极组件的一侧设置与注液口2连通的第二凹槽23，注液时电解液可以沿第二凹槽向壳体11的侧壁52流动，沿壳体11的侧壁52向下流动，便于注液。
图9为本申请的电化学装置的带有防爆阀的另一种密封塞的结构 示意图。
一般电化学装置还包括防爆阀。当电池升温，电池内部气体膨胀，电池内压增大，压力增大到一定程度时防爆阀打开，放气泄压，从而避免电池爆炸。本申请的电化学装置的防爆阀可以设置在密封塞3上。如图9所示，防爆阀30可以为刻划在密封塞3上的缝隙，缝隙的深度小于密封塞3的厚度。
示例性地，可以由金属制成如图7所示形状的密封塞3，并通过激光刻蚀在密封塞3内侧形成贯穿部分的密封塞3厚度的缝隙。该缝隙即防爆阀30。防爆阀30的形状和深度可以存在多种。当电芯内压达到一定程度时会因应力集中裂开而达到泄压的目的。注液完成后，通过激光焊接，将密封塞3焊接在注液口2，完成注液口2的密封。
如果在壳盖1内侧刻蚀防爆阀30，则需要刻蚀前对壳盖1正反面进行区分。而且量产中存在壳盖1装配反了的情况，这导致刻蚀有防爆阀30的一侧朝向外，导致防爆阀30无法起到泄压作用。而将防爆阀30设置在密封塞3的内侧，而密封塞3不存在正反面装配反了的情况，可以规避因装配方向出错导致的防爆阀失效的风险。
本申请提供的电化学装置，采用的壳盖中心设置有注液口，注液时只需一次定位。注液口可采用沉孔设计。注液口可采用内侧刻蚀有防爆阀的密封塞密封，加工简单，装配效率高。
本申请还提供一种电子装置，包括上述任一项所述的电化学装置。
尽管已经相对于一个或多个实现方式示出并描述了本申请，但是本领域技术人员基于对本说明书和附图的阅读和理解将会想到等价变型和修改。本申请包括所有这样的修改和变型，并且仅由所附权利要求的范围限制。特别地关于由上述组件执行的各种功能，用于描述这样的组件的术语旨在对应于执行所述组件的指定功能(例如其在功能上是等价的)的任意组件(除非另外指示)，即使在结构上与执行本文所示的本说明书的示范性实现方式中的功能的公开结构不等同。此外，尽管本说明书的特定特征已经相对于若干实现方式中的仅一个被公开，但是这种特征可以与如可以对给定或特定应用而言是期望和有利的其他实现方式的一个或多个其他特征组合。而且，就术语“包括”、 “具有”、“含有”或其变形被用在具体实施方式或权利要求中而言，这样的术语旨在以与术语“包含”相似的方式包括。进一步地，应当理解的是，在本文中提及的“多个”是指两个或两个以上。对于本文中提及的步骤，其通过数字后缀仅仅是为了清晰表述实施例，便于理解，并不完全代表步骤执行的先后顺序，应当以逻辑关系的先后设定为思考。
以上所述仅为本申请的实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，例如各实施例之间技术特征的相互结合，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (11)

  1. 一种电化学装置，包括壳体、设置于所述壳体内的电极组件和电解液；其中，所述壳体包括：
    壳体主体，所述壳体主体包括侧壁；
    与所述壳体主体盖合的壳盖，所述壳盖的中心设置有注液口；和
    用于密封所述注液口的密封塞；
    其中，所述电极组件的第一极耳电连接所述侧壁，所述电极组件的第二极耳电连接设置在所述侧壁上的极柱，所述极柱与所述侧壁绝缘设置。
  2. 根据权利要求1所述的电化学装置，其中，所述的电化学装置还包括防爆阀，所述防爆阀设置在所述密封塞上。
  3. 根据权利要求2所述的电化学装置，其中，所述防爆阀为形成在所述密封塞靠近所述壳体内部的表面上的缝隙，所述缝隙深度小于所述密封塞的厚度。
  4. 根据权利要求1所述的电化学装置，其中，所述注液口包括作为注液通道的通孔，和围绕所述通孔设置的第一凹槽；所述密封塞包括塞头和塞帽，所述塞头与所述通孔的直径适配，所述塞帽与所述第一凹槽适配。
  5. 根据权利要求1所述的电化学装置，其中，所述壳盖的靠近电极组件的一侧还设置有与所述注液口连通的第二凹槽，所述第二凹槽从所述注液口延伸至所述壳体主体与所述电极组件之间的间隙。
  6. 根据权利要求1所述的电化学装置，其中，
    所述电极组件为卷绕结构，所述电极组件的轴向平行于所述壳盖；或者，所述电极组件为层叠结构，所述电极组件的极片平行于所述壳盖。
  7. 根据权利要求6所述的电化学装置，其中，所述侧壁包括金属层，所述金属层与所述电极组件中的第一极片电连接；所述侧壁设置有通孔；所述极柱设置于所述通孔内，且所述极柱的第一端自所述通孔伸出，所述极柱的第二端与所述电极组件中的第二极片电 连接；
    所述电化学装置还包括密封绝缘件，所述密封绝缘件围绕所述极柱设置，以隔开所述极柱和所述侧壁的金属层，并密封所述通孔。
  8. 根据权利要求7所述的电化学装置，其中，所述第一极片为负极极片，所述第二极片为正极极片；所述电化学装置还包括正极转接导电体和负极转接导电体；
    所述电极组件还包括：多个正极极耳、多个负极极耳，卷绕结构中所述正极极片的每一卷绕层或层叠结构中的每一层正极极片均通过一个所述正极极耳与所述正极转接导电体的第一端电连接，所述正极转接导电体的第二端与所述极柱的第二端电连接；卷绕结构中所述负极极片的每一卷绕层或层叠结构中的每一层负极极片均通过一个所述负极极耳与所述负极转接导电体的第一端电连接，所述负极转接导电体的第二端与所述金属层电连接。
  9. 根据权利要求7所述的电化学装置，其中，所述侧壁包括第一部分和第二部分，所述第一部分为与所述壳盖垂直的平面，所述通孔设置在所述第一部分；所述第二部分围绕所述第一部分形成闭合结构。
  10. 根据权利要求9所述的电化学装置，其中，所述壳体主体的底部端面上设置有绝缘垫片。
  11. 一种电子设备，其中，所述电子设备包括权利要求1－10任一项所述的电化学装置。
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115882123A (zh) * 2021-09-28 2023-03-31 宁德新能源科技有限公司 电池及应用所述电池的用电装置
CN113937395B (zh) * 2021-09-30 2024-10-22 新余赣锋电子有限公司 一种扣式电池
CN113764790A (zh) * 2021-10-08 2021-12-07 深圳市聚和源科技有限公司 盖合组件及电池
CN114142188B (zh) * 2021-11-30 2024-11-05 宁德新能源科技有限公司 电化学装置及用电设备
CN114628862A (zh) * 2022-03-24 2022-06-14 广东国光电子有限公司 一种锂离子电池及其制备方法
CN115064833B (zh) * 2022-08-16 2022-11-11 宁德新能源科技有限公司 电化学装置及电子设备
CN117117426B (zh) * 2023-09-27 2025-01-07 蜂巢能源科技股份有限公司 电池单体及电池模块

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205050879U (zh) * 2015-09-10 2016-02-24 浙江虹达特种橡胶制品有限公司 一种安全性高的锂电池壳
CN107768586A (zh) * 2017-09-28 2018-03-06 珠海微矩实业有限公司 纽扣电池及其装置
CN110880566A (zh) * 2019-09-19 2020-03-13 宁德新能源科技有限公司 电池
CN211404538U (zh) * 2020-03-30 2020-09-01 珠海冠宇电池股份有限公司 扣式电池的外壳组件、扣式电池以及电子产品
CN211605201U (zh) * 2020-03-31 2020-09-29 宁德新能源科技有限公司 电池和具有所述电池的用电装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070231681A1 (en) * 2006-03-31 2007-10-04 Casby Kurt J Immobilization system for an electrochemical cell
CN101964400B (zh) * 2010-09-01 2013-09-04 朝阳立塬新能源有限公司 一种储能器件盖板
CN105118936B (zh) * 2015-09-06 2017-12-01 泰兴市新业电子有限公司 一种动力电池防爆防燃烧盖帽
CN110400895B (zh) * 2019-07-30 2021-03-09 宁德时代新能源科技股份有限公司 电池模组、二次电池及其顶盖组件
CN110459705A (zh) * 2019-09-05 2019-11-15 重庆市紫建电子有限公司 一种提升径向空间利用率的纽扣电池
CN211045559U (zh) * 2019-11-21 2020-07-17 漳州万宝能源科技股份有限公司 扣式电池的防爆孔结构
CN210984841U (zh) * 2019-12-13 2020-07-10 广东中科瑞龙精密技术有限公司 一种纽扣电池的新型防爆结构
CN211350699U (zh) * 2020-02-25 2020-08-25 江西省倍特力新能源有限责任公司 一种纽扣电池及其用于纽扣电池的外壳
CN211654872U (zh) * 2020-05-09 2020-10-09 珠海冠宇电池股份有限公司 扣式电池的外壳组件、扣式电池以及电子产品

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205050879U (zh) * 2015-09-10 2016-02-24 浙江虹达特种橡胶制品有限公司 一种安全性高的锂电池壳
CN107768586A (zh) * 2017-09-28 2018-03-06 珠海微矩实业有限公司 纽扣电池及其装置
CN110880566A (zh) * 2019-09-19 2020-03-13 宁德新能源科技有限公司 电池
CN211404538U (zh) * 2020-03-30 2020-09-01 珠海冠宇电池股份有限公司 扣式电池的外壳组件、扣式电池以及电子产品
CN211605201U (zh) * 2020-03-31 2020-09-29 宁德新能源科技有限公司 电池和具有所述电池的用电装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4254613A4 *

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