WO2024036736A1 - 顶盖组件及电池结构 - Google Patents

顶盖组件及电池结构 Download PDF

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Publication number
WO2024036736A1
WO2024036736A1 PCT/CN2022/125700 CN2022125700W WO2024036736A1 WO 2024036736 A1 WO2024036736 A1 WO 2024036736A1 CN 2022125700 W CN2022125700 W CN 2022125700W WO 2024036736 A1 WO2024036736 A1 WO 2024036736A1
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WO
WIPO (PCT)
Prior art keywords
cover assembly
seal
housing
top cover
pole
Prior art date
Application number
PCT/CN2022/125700
Other languages
English (en)
French (fr)
Inventor
李尚益
岳亮亮
王志明
Original Assignee
湖北亿纬动力有限公司
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 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Priority to EP22818606.0A priority Critical patent/EP4350852A1/en
Publication of WO2024036736A1 publication Critical patent/WO2024036736A1/zh

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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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • 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
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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

  • This application relates to the field of battery technology, for example, to a top cover assembly and a battery structure.
  • the top cover assembly is arranged at one end of the casing.
  • the top cover assembly is sealingly connected to the casing, and the poles of the top cover assembly are insulated from the casing.
  • Related art discloses a cylindrical battery with a new structure, in which a seal is placed on the pole so that when the pole is riveted and connected to the casing, the seal elastically deforms to fill the gap between the pole and the casing. , while achieving sealing and insulation between the pole and the shell.
  • the degree of deformation in the radial direction may be different, which may lead to poor consistency of the batteries, thereby affecting the consistency of the battery pack and the stability of the connection.
  • This application provides a top cover assembly, which can not only ensure a sealed connection with the casing, but also improve the consistency of the battery and effectively ensure the product performance of the battery.
  • embodiments of the present application provide a top cover assembly, which is applied to a battery.
  • the battery includes a casing, the casing includes a mounting hole, and the top cover assembly is inserted through the mounting hole of the casing.
  • the top cover assembly includes:
  • a pole having a concave annular groove arranged along a radial direction
  • the seal is sleeved on the pole and located in the annular groove, the seal is sandwiched between the housing and the groove wall of the annular groove, the seal part Located on the outside of the housing;
  • a plastic part is sleeved on the sealing part and located outside the housing.
  • the plastic part is partially sandwiched between the housing and the groove wall of the annular groove.
  • the hardness of the plastic part is greater than the hardness of the sealing part.
  • the plastic part includes a connected inner ring and an outer ring.
  • the inner ring is sandwiched between the groove wall of the annular groove and the housing and overlaps with the sealing member.
  • the outer ring is located outside the annular groove and is arranged around the outside of the pole. There is a gap between the outer ring and the outer peripheral surface of the pole.
  • the size of the gap is a
  • the value range of a is 0.1mm-0.5mm.
  • the width of the outer ring is b, and the value range of b is 0.4mm-1mm, the overlap length of the inner ring and the seal is c, and the value range of c is 0.8mm-3mm.
  • the sealing member includes a first sealing member and a second sealing member, the first sealing member overlaps the inner ring, and the first sealing member and the second sealing member are At least one of them has a bent portion through which the first sealing member and the second sealing member abut. The bent portion is sandwiched between the bottom of the annular groove and the housing. between.
  • a limiting groove is provided on the wall of the annular groove
  • a limiting protrusion is provided on the inner ring
  • the inner ring is sandwiched between the housing and the wall of the annular groove.
  • the limiting protrusion is located in the limiting groove.
  • the top cover assembly further includes a metal pressure ring, which is sleeved on the pole and located in the annular groove.
  • the metal pressure ring abuts the seal and Located on the side of the seal away from the plastic part, the housing presses the seal and the metal pressure ring on the groove wall of the annular groove.
  • the metal pressing ring and the pole are connected by welding.
  • the top cover assembly further includes a positive current collecting plate and an inner insulating sheet.
  • the positive current collecting plate is arranged on the cell of the battery, and the pole passes through the mounting hole and abuts against the battery core. Press the positive current collecting plate, and the inner insulating sheet is sandwiched between the positive current collecting plate and the inner wall of the housing.
  • This application provides a battery structure with a high degree of consistency and can effectively ensure the product performance of the battery.
  • embodiments of the present application provide a battery structure, including a battery core, a casing, a bottom cover assembly and the above-mentioned top cover assembly.
  • the battery core is located in the casing, the top cover assembly and the above-mentioned top cover assembly.
  • Bottom cover assemblies are respectively provided at both ends of the housing.
  • the bottom cover assembly includes a stacked bottom cover plate and a negative current collecting plate, the bottom cover assembly contacts the battery core through the negative current collecting plate, and the bottom cover assembly It is connected to the housing through the bottom cover plate.
  • a protruding first protrusion is provided on a side of the bottom cover facing the negative current collecting plate
  • a protruding third protrusion is provided on a side of the negative current collecting pan facing the bottom cover.
  • Two convex parts the first convex part is in contact with the second convex part, and the second convex part is used to adjust the distance between the negative current collecting plate and the bottom cover plate.
  • the top cover assembly proposed in this application includes a pole, a seal and a plastic part.
  • the pole has an annular groove concave in the radial direction.
  • the seal is sleeved on the pole and located in the annular groove.
  • the casing will squeeze the seal so that the seal is sandwiched between the groove wall of the annular groove and the casing and elastically deforms to fill the space between the casing and the pole. gap to achieve sealing.
  • seals are provided on both the inner and outer sides of the casing.
  • the plastic parts are sleeved on the seals and located on the outside of the casing.
  • the plastic part can give the seal located outside the housing a reaction force toward the pole, thereby preventing the seal from extending and deforming in the radial direction of the pole away from the pole, thus improving the appearance of the top cover assembly. Consistency reduces the impact of the assembly process on the appearance of the top cover assembly, thereby ensuring the product performance of the battery.
  • the battery structure proposed in this application includes a battery core, a casing, a bottom cover assembly and a top cover assembly.
  • the battery core is located in the casing.
  • the top cover assembly and the bottom cover assembly are respectively provided at both ends of the casing. It has a top cover assembly. It can effectively improve the consistency of the battery and ensure the product performance of the battery.
  • Figure 1 is a cross-sectional view of a top cover assembly provided by an embodiment of the present application
  • Figure 2 is a cross-sectional view of a pole provided by an embodiment of the present application.
  • Figure 3 is an exploded view of the battery structure provided by the embodiment of the present application.
  • Figure 4 is a cross-sectional view of the battery structure provided by the embodiment of the present application.
  • FIG. 5 is an enlarged view of position A in FIG. 4 .
  • Top cover assembly 101. Pole; 1011. Annular groove; 10111. Limiting groove; 1012. Assembly hole; 11. Seal; 102. First seal; 103. Second seal; 1031. Bend Folding part; 104. Plastic parts; 1041. Inner ring; 10411. Limiting protrusion; 1042. Outer ring; 105. Metal pressure ring; 106. Inner insulation sheet; 107. Positive collector plate; 108. Insulating glue;
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral body.
  • It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements.
  • the specific meanings of the above terms in this application can be understood on a case-by-case basis.
  • the term “above” or “below” a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • this embodiment provides a top cover assembly 10 including a pole 101 , a seal 11 and a plastic part 104 .
  • the pole 101 has an annular groove 1011 concave in the radial direction, and the seal 11 is sleeved on the pole 101 and located in the annular groove 1011, because the top cover assembly 10 and the battery shell 40 pass through the pole 101 and the shell.
  • 40 riveting connection when the pole 101 is inserted into the mounting hole 401 of the housing 40, the sealing member 11 is sandwiched between the housing 40 and the groove wall of the annular groove 1011, and the sealing member 11 is partially located in the housing 40 outside.
  • the housing 40 is inserted into the annular groove 1011 and squeezes the seal 11, so that the gap between the housing 40 and the pole 101 is filled through the elastic deformation of the seal 11, thereby achieving sealing between the housing 40 and the pole 101. connection while insulating the pole 101 and the housing 40 .
  • the plastic part 104 is sleeved on the seal 11 and located outside the housing 40 , and the plastic part 104 is partially sandwiched between the housing 40 and the groove wall of the annular groove 1011 .
  • the plastic part 104 is made of plastic material, it will not elastically deform during the riveting process.
  • the sealing member 11 elastically deforms, the plastic part 104 can give the sealing member located outside the housing 40 toward the pole 101 direction.
  • the reaction force prevents the sealing member 11 from extending and deforming along the radial direction of the pole 101 and toward the side away from the pole 101 .
  • the appearance of the top cover assembly 10 is kept consistent.
  • the hardness of the plastic part 104 is greater than the hardness of the sealing part 11 .
  • the seal 11 is made of fluororubber material
  • the plastic part 104 is made of polyphenylene sulfide (PPS) plastic material.
  • the plastic part 104 includes a connected inner ring 1041 and an outer ring 1042.
  • the outer ring 1042 is connected to the outside of the inner ring 1041.
  • the inner ring 1041 is sandwiched between the groove wall of the annular groove 1011 and the housing 40, and The inner ring 1041 overlaps the seal 11 , while the outer ring 1042 is located outside the annular groove 1011 and is ringed around the outside of the pole 101 .
  • the outer ring 1042 does not cover the outer end surface of the pole 101, and setting this gap can avoid the pole 101 and plastic parts in humid and other environments. Electricity creepage occurs between 104 and 104.
  • the overlapping of the inner ring 1041 and the seal 11 causes the connection between the inner ring 1041 and the seal 11 to have an overlapping portion, which can also avoid the occurrence of creepage between the pole 101 and the seal 11 located inside the housing 40 Phenomenon.
  • the size of the gap between the outer ring 1042 and the outer peripheral surface of the pole 101 is a
  • the value range of a is 0.1mm-0.5mm
  • the width of the outer ring 1042 is b.
  • the value range of b is 0.4mm-1mm.
  • the inner ring 1041 and the seal 11 are overlapped in an L-shaped structure.
  • the overlap length of the inner ring 1041 and the seal 11 is c
  • the value of c ranges from 0.8 mm to 3 mm.
  • the inner ring 1041 is provided with a limiting protrusion 10411, and the groove wall of the annular groove 1011 is provided with a limiting groove 10111.
  • the inner ring 1041 is sandwiched between the housing 40 and the groove wall of the annular groove 1011, with a The limiting protrusion 10411 will be located in the limiting groove 10111.
  • the relative position of the injection molded part 104 and the pole 101 can be fixed in the radial direction of the pole 101, thereby preventing the injection molded part 104 from being affected by the elastic deformation of the seal 11
  • the force causes the pole 101 to deflect, which is beneficial to improving the appearance consistency of the top cover assembly.
  • the seal 11 in order to avoid contact between the housing 40 and multiple parts of the pole 101, the seal 11 is in contact with the groove walls of the annular groove 1011, where the seal 11 includes a first seal 102 and a second seal. 103.
  • the first sealing member 102 overlaps the inner ring 1041.
  • At least one of the first sealing member 102 and the second sealing member 103 has a bending portion 1031.
  • the first sealing member 102 and the second sealing member 103 are bent The bent portion 1031 is in contact with the bottom of the annular groove 1011 and the housing 40 to form a space for the housing 40 to be inserted therebetween.
  • the second seal 103 is provided with a bent portion 1031, and the bent portion 1031 protrudes along the axial direction of the second seal 103, so that the second seal 103 is sleeved in the annular groove 1011, and the shell
  • the bent portion 1031 is sandwiched between the bottom of the annular groove 1011 and the housing 40 .
  • the bending portion 1031 can also be provided on the first sealing member 102, or the bending portion 1031 can be provided on both the first sealing member 102 and the second sealing member 103 to achieve the above structure.
  • the first sealing member 102 is located outside the housing 40, that is, the injection molded part 104 overlaps the first sealing member 102.
  • the injection molded part 104 moves toward the first sealing member 102.
  • the glue 102 exerts a force toward the axis of the pole 101, and at the same time, the force can be transmitted to the second seal 103, and the second seal 103 abuts against the groove wall of the annular groove 1011.
  • the top cover assembly 10 further includes a metal pressing ring 105 , which is sleeved on the pole 101 and located in the annular groove 1011 .
  • the metal pressing ring 105 abuts the seal 11 and is located away from the plastic part of the seal 11 .
  • the housing 40 presses the seal 11 and the metal pressing ring 105 on the groove wall of the annular groove 1011. Since the pole 101 and the casing 40 are connected by riveting, the metal pressing ring 105 can prevent the pole 101 from crushing the seal 11 during the riveting process, thereby directly contacting the casing 40 and causing a short circuit.
  • the metal pressure ring 105 is made of aluminum. By controlling the compression rate of the sealing member 11 through the metal pressure ring 105, the pass rate of riveting molding can be improved. In this embodiment, the compression rate of the sealing member 11 is 10%-30%.
  • the metal pressing ring 105 and the pole post 101 are connected by welding.
  • the metal pressure ring 105 squeezes the seal 11 to achieve sealing between the metal pressure ring 105 and the inner wall of the housing 40 .
  • the sealing between the metal pressing ring 105 and the flange of the pole 101, that is, the groove wall of the annular groove 1011, is achieved by mechanical extrusion between the pole 101 and the metal pressing ring 105 to form a bonding surface first, and then using laser By welding, the joint surface is completely sealed to ensure reliable sealing between the pole 101 and the inner wall of the housing 40 .
  • the top cover assembly 10 also includes a positive current collecting plate 107 and an inner insulating sheet 106.
  • the positive current collecting plate 107 is disposed on the battery core 30, and the inner insulating sheet 106 is located on the side of the positive current collecting plate 107 facing away from the battery core 30. That is, the inner insulating sheet 106 is sandwiched between the positive current collecting plate 107 and the casing 40 to prevent the positive current collecting plate 107 from contacting the casing 40, and one end of the pole 101 passes through the inner insulating sheet 106 to contact the positive collecting plate.
  • the battery also includes an insulating glue 108 attached to the outer peripheral surface of the end of the battery core 30 that contacts the positive current collecting plate 107. The insulating glue 108 is used to prevent short circuits caused by the contact between the positive electrode of the battery core 30 and the case 40. Condition.
  • the outer diameter of the end of the pole 101 extending out of the housing 40 is designed to be The value range is 14.5mm-18.5mm.
  • the pole 101 is provided with an assembly hole 1012, and the diameter of the assembly hole 1012 is The value range is 3mm-8mm.
  • the depth of the assembly hole 1012 is H 1 , and the value range of H 1 is 2mm-3.5mm.
  • the distance between the bottom surface of the mounting hole 1012 and the side of the pole 101 that abuts the battery core 30 is H 2 , and the value range of H 2 is 0.6mm-2mm.
  • the draft angle of the design process molding is ⁇ , and the value range of ⁇ is 2°-8°.
  • this embodiment also provides a battery structure, including a battery core 30, a casing 40, a bottom cover assembly 20 and the above-mentioned top cover assembly 10.
  • the battery core 30 is disposed in the casing 40.
  • the bottom cover assembly 20 and the top cover assembly 10 are respectively disposed at both ends of the housing 40 .
  • the top cover assembly 10 is electrically connected to the battery core 30 and is insulated from the housing 40 .
  • the bottom cover assembly 20 abuts the battery core 30 and is insulated from the housing 40 .
  • Body 40 is electrically connected.
  • the bottom cover assembly 20 includes a stacked bottom cover plate 201 and a negative collector plate 202 .
  • the bottom cover assembly 20 is connected to one end of the housing 40 through the bottom cover plate 201 , and through the negative collector plate.
  • the flow plate 202 is in contact with the battery core 30 .
  • the bottom cover 201 is provided with a first protrusion 2011 on one side facing the negative current collecting plate 202 , and the negative current collecting plate 202 faces the bottom cover 201
  • a second protrusion 2021 is protruding from one side of the body.
  • the first protrusion 2011 is in contact with the second protrusion 2021.
  • the second protrusion 2021 is configured to adjust the distance between the negative current collecting plate 202 and the bottom cover 201.
  • the first protrusion 2011 is an annular structure punched and provided on the bottom cover 201
  • the second protrusion 2021 is an arched structure bent and provided on the negative current collecting plate 202 .
  • the negative current collecting plate 202 Based on the sheet shape of the negative current collecting plate 202, it is provided with an arched structure, so that the negative current collecting plate 202 has a resilient force toward the battery core 30 and the bottom cover 201 under the pressure of the battery core 30, so as to ensure that the battery core 30.
  • the reliable contact between the negative current collecting plate 202 and the bottom cover 201 can provide a certain error space for the assembly of the battery in the axial direction.
  • the negative current collecting plate 202 is welded to the battery core 30 and the case 40 .
  • the minimum distance between the side of the negative current collecting plate 202 that contacts the battery core 30 and the first protrusion 2011 in the axial direction of the battery is d,
  • the value range of d is 1mm-2.5mm.
  • the minimum width of the first protrusion 2011 along the radial direction of the bottom cover plate 201 is e, and the value range of e is 2 mm-6 mm.
  • the bottom cover 201 is also provided with an explosion-proof score 2012 on the side facing the negative collecting plate 202 .
  • the explosion-proof notch 2012 can be used as a safety explosion-proof valve for the battery. When a short circuit, overcharge or over-discharge occurs inside the battery, a large amount of gas generated inside the battery will cause the bottom cover 201 to rupture from the explosion-proof notch 2012, thereby achieving Relieve pressure. Explosion-proof notches 2012 are set on the inside to improve the sensitivity of explosion-proof opening.
  • the bottom cover assembly 20 also includes a bottom sealing ring 203.
  • the bottom sealing ring 203 is arranged around the outer periphery of the bottom cover 201 and is sandwiched between the bottom cover 201 and the inner wall of the housing 40 to ensure that the bottom of the battery is securely sealed. of sealing.
  • the casing 40 is first subjected to a rolling groove process to form a groove in the lower part, and the bottom cover 201 and the bottom sealing ring 203 are arranged below the groove. Then, the casing 40 is made through a pressing process. Fold inward to fix the bottom cover 201, the bottom sealing ring 203 and the housing 40, and the bottom sealing ring 203 is squeezed in this process.
  • the compression rate of the bottom sealing ring 203 is 15%-50%, and the distance between the groove and the bottom of the housing 40 after installation is 2mm-3.2mm.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
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Abstract

一种顶盖组件及电池结构，电池包括壳体（40），壳体（40）包括安装孔（401），顶盖组件穿设于壳体（40）的安装孔（401）内，其中顶盖组件包括极柱（101）、密封件（11）和塑胶件（104），极柱（101）具有沿径向设置的凹陷的环形槽（1011）。密封件（11）套设于极柱（101）上且位于环形槽（1011）内，密封件（11）夹设于环形槽（1011）的槽壁和壳体（40）之间，密封件（11）部分位于壳体（40）的外侧，塑胶件（104）套设于密封件（11）上且位于壳体（40）的外侧，塑胶件（104）部分夹设于壳体（40）和环形槽（1011）的槽壁之间。

Description

顶盖组件及电池结构
本申请要求在2022年8月17日提交中国专利局、申请号为202222160478.3的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，例如涉及一种顶盖组件及电池结构。
背景技术
顶盖组件设置于壳体的一端，为保证电池的使用性能，顶盖组件与壳体密封连接，且顶盖组件的极柱与壳体之间绝缘设置。相关技术中公开一种新型结构的圆柱型电池，其通过在极柱上套设密封件，以使得当极柱铆接连接于壳体时，密封件弹性变形填充极柱和壳体之间的间隙，同时实现极柱和壳体之间的密封与绝缘。但是不同电池的密封件在被壳体挤压变形时，其沿径向方向的变形程度可能不同，因而会导致电池的一致性程度较差，从而影响电池成组的一致性以及连接稳定性。
因此，亟需一种顶盖组件及电池结构，以解决上述问题。
发明内容
本申请提供了一种顶盖组件，其不仅能够保证与壳体的密封连接，同时可提高电池的一致性程度，有效保证电池的产品性能。
第一方面，本申请实施例提供了一种顶盖组件，应用于电池，所述电池包括壳体，所述壳体包括安装孔，所述顶盖组件穿设于所述壳体的安装孔内，所述顶盖组件，包括：
极柱，所述极柱具有沿径向设置的凹陷的环形槽；
密封件，所述密封件套设于所述极柱上且位于所述环形槽内，所述密封件夹设于所述壳体和所述环形槽的槽壁之间，所述密封件部分位于所述壳体的外侧；
塑胶件，所述塑胶件套设于所述密封件上且位于所述壳体的外侧，所述塑胶件部分夹设于所述壳体和所述环形槽的槽壁之间。
在一实施例中，所述塑胶件的硬度大于所述密封件的硬度。
在一实施例中，所述塑胶件包括相连接的内圈和外圈，所述内圈夹设于所述环形槽的槽壁和所述壳体之间并与所述密封件搭接，所述外圈位于所述环形槽外且环设于所述极柱的外侧，所述外圈与所述极柱的外周面之间具有间隙。
在一实施例中，沿所述极柱的径向，所述间隙的尺寸为a，a的取值范围为0.1mm-0.5mm，所述外圈的宽度为b，b的取值范围为0.4mm-1mm，所述内圈和所述密封件的搭接长度为c，c的取值范围为0.8mm-3mm。
在一实施例中，所述密封件包括第一密封件和第二密封件，所述第一密封件与所述内圈搭接，所述第一密封件和所述第二密封件中的至少之一具有弯折部，所述第一密封件和所述第二密封件通过所述弯折部抵接，所述弯折部夹设于所述环形槽的槽底和所述壳体之间。
在一实施例中，所述环形槽的槽壁上设置有限位凹槽，所述内圈上设置有限位凸起，所述内圈夹设于所述壳体和所述环形槽的槽壁之间，所述限位凸起位于所述限位凹槽内。
在一实施例中，所述顶盖组件还包括金属压环，所述金属压环套设于所述极柱上且位于所述环形槽内，所述金属压环抵接所述密封件且位于所述密封件远离所述塑胶件的一侧，所述壳体抵压所述密封件和所述金属压环于所述环形槽的槽壁上。
在一实施例中，所述金属压环和所述极柱焊接连接。
在一实施例中，所述顶盖组件还包括正集流盘和内绝缘片，所述正集流盘设置于所述电池的电芯上，所述极柱穿过所述安装孔并抵压所述正集流盘，所述内绝缘片夹设于所述正集流盘和所述壳体的内壁之间。
本申请提供了一种电池结构，其一致性程度高，可有效保证电池的产品性能。
第二方面，本申请实施例提供了一种电池结构，包括电芯、壳体、底盖组件和上述的顶盖组件，所述电芯位于所述壳体内，所述顶盖组件和所述底盖组件分别设置于所述壳体的两端。
在一实施例中，所述底盖组件包括层叠设置的底盖板和负集流盘，所述底盖组件通过所述负集流盘与所述电芯抵接，且所述底盖组件通过所述底盖板与所述壳体连接。
在一实施例中，所述底盖板朝向所述负集流盘的一面设有凸出的第一凸部，所述负集流盘朝向所述底盖板的一面设有凸出的第二凸部，所述第一凸部与所述第二凸部抵接，所述第二凸部用于调整所述负集流盘和所述底盖板之间的间距。
本申请的有益效果为：
本申请提出的顶盖组件包括极柱、密封件和塑胶件，其中极柱具有沿径向凹设的环形槽，密封件套设于极柱上且位于环形槽内，当顶盖组件穿设于电池的壳体的安装孔内时，壳体将挤压密封件，使得密封件被夹设于环形槽的槽壁和壳体之间并产生弹性变形，以填充壳体和极柱之间的间隙，实现密封。而为确保极柱和壳体之间绝缘，密封件于壳体的内外两侧均有设置，塑胶件即是套设于密封件上且位于壳体的外侧，当密封件发生弹性变形时，塑胶件即可给予位于壳体外侧的密封件朝向极柱方向的反作用力，从而阻止密封件在极柱径向 方向上，朝背离极柱一侧的延伸变形，以此提高顶盖组件的外观一致性，降低装配工艺对顶盖组件外观的影响，从而保证电池的产品性能。
本申请提出的电池结构包括电芯、壳体、底盖组件和顶盖组件，电芯位于壳体内，顶盖组件和底盖组件分别设置于壳体的两端，其所具有的顶盖组件可有效提高电池的一致性程度，保证电池的产品性能。
附图说明
图1是本申请实施例提供的顶盖组件的剖视图；
图2是本申请实施例提供的极柱的剖视图；
图3是本申请实施例提供的电池结构的爆炸图；
图4是本申请实施例提供的电池结构的剖视图；
图5是图4中A处的放大图。
图中：
10、顶盖组件；101、极柱；1011、环形槽；10111、限位凹槽；1012、装配孔；11、密封件；102、第一密封件；103、第二密封件；1031、弯折部；104、塑胶件；1041、内圈；10411、限位凸起；1042、外圈；105、金属压环；106、内绝缘片；107、正集流盘；108、绝缘胶；
20、底盖组件；201、底盖板；2011、第一凸部；2012、防爆刻痕；202、负集流盘；2021、第二凸部；203、底密封圈；
30、电芯；
40、壳体；401、安装孔。
具体实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本实施例的描述中，术语“上”、“下”、“左”、“右”等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以 区分，并没有特殊的含义。
如图1至图3所示，本实施例提供一种顶盖组件10，包括极柱101、密封件11和塑胶件104。其中极柱101具有沿径向凹设的环形槽1011，密封件11套设于极柱101上且位于环形槽1011内，因顶盖组件10与电池的壳体40通过极柱101与壳体40的铆接连接，当极柱101穿设于壳体40的安装孔401内，密封件11夹设于壳体40和所述环形槽1011的槽壁之间，密封件11部分位于壳体40的外侧。即壳体40插设于环形槽1011内并挤压密封件11，以此通过密封件11的弹性变形填充壳体40和极柱101之间的间隙，实现壳体40和极柱101的密封连接，同时使得极柱101和壳体40之间绝缘。
极柱101和壳体40铆接连接时，受铆接受力位置偏差等影响，难以保证每个电池在装配时，其密封件11的弹性变形均完全一致。即密封件11在发生弹性变形时，其沿极柱101的径向的变形量可能存在差异，而这一差异不仅会影响电池的外观，还可能会影响电池成组时的一致性以及连接稳定性，从而影响电池模组的性能。因此，设置塑胶件104套设于密封件11上且位于壳体40的外侧，塑胶件104部分夹设于壳体40和环形槽1011的槽壁之间。因塑胶件104由塑胶材料制成，其在铆接过程中不会发生弹性变形，当密封件11发生弹性变形时，塑胶件104即可给予位于壳体40外侧的密封件朝向极柱101方向的反作用力，从而阻止密封件11沿极柱101径向方向并朝背离极柱101一侧的延伸变形。通过限制密封件11沿极柱101的径向的变形程度，使顶盖组件10的外观保持一致。
示例性地，塑胶件104的硬度大于密封件11的硬度。示例性地，密封件11由氟橡胶材质制成，塑胶件104由聚苯硫醚(Polyphenylene sulfide，pps)塑料材质制成。
示例性地，塑胶件104包括相连接的内圈1041和外圈1042，外圈1042连接于内圈1041的外侧，内圈1041夹设于环形槽1011的槽壁和壳体40之间，且内圈1041与密封件11搭接，而外圈1042位于环形槽1011外且环设于极柱101的外侧，外圈1042与极柱101的外周面之间具有间隙。为便于极柱101的外端与电池模组其他部件的焊接，外圈1042未包覆极柱101的外端面，而设置这一间隙则可避免在潮湿等环境下，极柱101和塑胶件104之间出现爬电现象。而内圈1041和密封件11的搭接，则使得内圈1041和密封件11的连接具有重叠的部分，也可避免极柱101和位于壳体40的内侧的密封件11之间出现爬电现象。
示例性地，沿极柱101的径向，外圈1042与极柱101的外周面之间的间隙的尺寸为a，a的取值范围为0.1mm-0.5mm，外圈1042的宽度为b，b的取值范围为0.4mm-1mm。示例性地，内圈1041和密封件11采用L型结构进行搭接，内圈1041和密封件11的搭接长度为c，c的取值范围为0.8mm-3mm。
示例性地，内圈1041上设置有限位凸起10411，环形槽1011的槽壁上设置有限位凹槽10111，内圈1041夹设于壳体40和环形槽1011的槽壁之间，其上 的限位凸起10411将位于限位凹槽10111内。通过限位凸起10411和限位凹槽10111的凹凸配合，可使在极柱101的径向上，注塑件104和极柱101的相对位置固定，避免注塑件104受密封件11弹性变形的作用力而于极柱101上发生偏移，有利于顶盖组件外观一致性的提高。
示例性地，为避免壳体40与极柱101多个部位之间的抵接，密封件11与环形槽1011的槽壁均接触，其中密封件11包括第一密封件102和第二密封件103，第一密封件102与内圈1041搭接，第一密封件102和第二密封件103中的至少之一具有弯折部1031，第一密封件102和第二密封件103通过弯折部1031抵接，弯折部1031夹设于环形槽1011的槽底和壳体40之间，以在两者之间形成可供壳体40插设的空间。本实施例中，设置第二密封件103具有弯折部1031，该弯折部1031沿第二密封件103的轴向凸设，使得第二密封件103套设于环形槽1011内，且壳体40通过密封件插设于环形槽1011内时，弯折部1031被夹设于环形槽1011的槽底和壳体40之间。在其他实施例中，也可在第一密封件102上设置弯折部1031，或者是在第一密封件102和第二密封件103上均设置弯折部1031，以实现上述结构。本实施例中，第一密封件102位于壳体40的外侧，即注塑件104与第一密封件102搭接，当顶盖组件10铆接于壳体40上时，注塑件104向第一密封胶102施加朝向极柱101轴心的作用力，同时该作用力可传导至第二密封件103，第二密封件103与环形槽1011的槽壁抵接。
示例性地，顶盖组件10还包括金属压环105，金属压环105套设于极柱101上且位于环形槽1011内，金属压环105抵接密封件11且位于密封件11远离塑胶件104的一侧，当极柱101穿过安装孔401抵接电芯30时，壳体40抵压密封件11和金属压环105于环形槽1011的槽壁上。因极柱101和壳体40为铆接连接，设置金属压环105可避免铆接过程中极柱101挤破密封件11，从而与壳体40直接接触，致使短路。示例性地，金属压环105由铝材制成。通过金属压环105控制密封件11的压缩率，可提高铆接成型的合格率，本实施例中，密封件11的压缩率为10％-30％。
示例性地，金属压环105和极柱101焊接连接。在铆接过程中，金属压环105挤压密封件11，可实现金属压环105与壳体40的内壁之间的密封。而金属压环105和极柱101的翻边即环形槽1011的槽壁之间的密封则是通过极柱101和金属压环105之间的机械挤压，先形成结合面，然后再使用激光焊接，对该结合面实现完全密封，以保证极柱101和壳体40的内壁之间的可靠密封。
示例性地，顶盖组件10还包括正集流盘107和内绝缘片106，正集流盘107设置于电芯30上，内绝缘片106位于正集流盘107背离电芯30的一面，即内绝缘片106夹设于正集流盘107和壳体40之间，以避免正集流盘107与壳体40抵接，而极柱101的一端穿过内绝缘片106抵接正集流盘107。示例性地，电池还包括贴附于电芯30抵接正集流盘107一端的外周面的绝缘胶108，利用绝缘胶108避免发生电芯30的正极和壳体40抵接而导致的短路情况。
示例性地，如图2所示，为满足装配工艺，设计极柱101伸出壳体40的一端的外径为
Figure PCTCN2022125700-appb-000001
的取值范围为14.5mm-18.5mm。极柱101上设置有装配孔 1012，装配孔1012的直径为
Figure PCTCN2022125700-appb-000002
的取值范围为3mm-8mm。装配孔1012的孔深为H 1，H 1的取值范围为2mm-3.5mm。装配孔1012的底面距离极柱101抵接电芯30一面的距离为H 2，H 2的取值范围为0.6mm-2mm。为制作该装配孔1012，设计工艺成型拔模角度为α，α的取值范围为2°-8°。通过设置装配孔1012，可便于实现极柱101和正集流盘107的焊接连接，而在焊接后可通过涂胶或插设铝钉，以填实装配孔1012。
如图3至图5所示，本实施例还提供一种电池结构，包括电芯30、壳体40、底盖组件20和上述的顶盖组件10，电芯30设置于壳体40内，底盖组件20和顶盖组件10分别设置于壳体40的两端，顶盖组件10与电芯30电连接且与壳体40绝缘设置，而底盖组件20抵接电芯30且与壳体40电连接。
示例性地，如图4所示，底盖组件20包括层叠设置的底盖板201和负集流盘202，底盖组件20通过底盖板201连接于壳体40的一端，且通过负集流盘202与电芯30抵接。
示例性地，为实现上述底盖组件20与电芯30的可靠连接，底盖板201朝向负集流盘202的一面凸设有第一凸部2011，负集流盘202朝向底盖板201的一面凸设有第二凸部2021，第一凸部2011与第二凸部2021抵接，第二凸部2021设置为调整负集流盘202和底盖板201之间的间距。本实施例中，第一凸部2011为在底盖板201上冲压设置的环形结构，第二凸部2021为在负集流盘202上弯折设置的拱形结构。基于负集流盘202的薄片形状，设置其具有拱形结构，使得负集流盘202在电芯30的抵压下，具有朝向电芯30和底盖板201的回弹力，以保证电芯30、负集流盘202和底盖板201之间的可靠抵接，可为电池轴向上的装配提供一定的误差空间。示例性地，负集流盘202与电芯30、壳体40焊接连接。
示例性地，为保证第二凸部2021具有较好的回弹力，在电池轴向上，负集流盘202抵接电芯30的一面与第一凸部2011之间的最小距离为d，d的取值范围为1mm-2.5mm。
示例性地，为保证底盖板201与负集流盘202的接触良好，沿底盖板201的径向，第一凸部2011的最小宽度为e，e的取值范围为2mm-6mm。
示例性地，底盖板201朝向负集流盘202的一面还设置有防爆刻痕2012。防爆刻痕2012可作为电池的安全防爆阀，在电池内部发生短路、过充或过放等情况下，电池内部产生的大量气体将会从防爆刻痕2012处使底盖板201破裂，从而实现泄压。防爆刻痕2012设置于内侧，可提高防爆开启的灵敏度。
示例性地，底盖组件20还包括底密封圈203，底密封圈203环设于底盖板201的外周，且夹设于底盖板201和壳体40的内壁之间，从而保证电池底部的密封性。本实施例中，先对壳体40进行滚槽处理，以使其下部形成一圈凹槽，底盖板201和底密封圈203设置于凹槽下方，而后通过墩压工艺，使壳体40向内翻折，从而实现底盖板201、底密封圈203和壳体40的固定，底密封圈203在这一过程中被挤压。示例性地，底密封圈203的压缩率为15％-50％，安装完 成后凹槽与壳体40的底部之间的距离为2mm-3.2mm。

Claims (12)

  1. 一种顶盖组件，应用于电池，所述电池包括壳体(40)，所述壳体包括安装孔(401)，所述顶盖组件(10)穿设于所述壳体(40)的安装孔(401)内，所述顶盖组件包括：
    极柱(101)，所述极柱(101)具有沿径向设置的凹陷的环形槽(1011)；
    密封件(11)，所述密封件(11)套设于所述极柱(101)上且位于所述环形槽(1011)内，所述密封件(11)夹设于所述壳体(40)和所述环形槽(1011)的槽壁之间，所述密封件(11)部分位于所述壳体(40)的外侧；
    塑胶件(104)，所述塑胶件(104)套设于所述密封件(11)上且位于所述壳体(40)的外侧，所述塑胶件(104)部分夹设于所述壳体(40)和所述环形槽(1011)的槽壁之间。
  2. 根据权利要求1所述的顶盖组件，其中，所述塑胶件(104)的硬度大于所述密封件(11)的硬度。
  3. 根据权利要求1所述的顶盖组件，其中，所述塑胶件(104)包括相连接的内圈(1041)和外圈(1042)，所述内圈(1041)夹设于所述环形槽(1011)的槽壁和所述壳体(40)之间并与所述密封件(11)搭接，所述外圈(1042)位于所述环形槽(1011)外且环设于所述极柱(101)的外侧，所述外圈(1042)与所述极柱(101)的外周面之间具有间隙。
  4. 根据权利要求3所述的顶盖组件，其中，沿所述极柱(101)的径向，所述间隙的尺寸为a，a的取值范围为0.1mm-0.5mm，所述外圈(1042)的宽度为b，b的取值范围为0.4mm-1mm，所述内圈(1041)和所述密封件(11)的搭接长度为c，c的取值范围为0.8mm-3mm。
  5. 根据权利要求3所述的顶盖组件，其中，所述密封件(11)包括第一密封件(102)和第二密封件(103)，所述第一密封件(102)与所述内圈(1041)搭接，所述第一密封件(102)和所述第二密封件(103)中的至少之一具有弯折部(1031)，所述第一密封件(102)和所述第二密封件(103)通过所述弯折部(1031)抵接，所述弯折部(1031)夹设于所述环形槽(1011)的槽底和所述壳体(40)之间。
  6. 根据权利要求3所述的顶盖组件，其中，所述环形槽(1011)的槽壁上设置有限位凹槽(10111)，所述内圈(1041)上设置有限位凸起(10411)，所述内圈(1041)夹设于所述壳体(40)和所述环形槽(1011)的槽壁之间，所述限位凸起(10411)位于所述限位凹槽(10111)内。
  7. 根据权利要求1所述的顶盖组件，还包括金属压环(105)，所述金属压环(105)套设于所述极柱(101)上且位于所述环形槽(1011)内，所述金属压环(105)抵接所述密封件(11)且位于所述密封件(11)远离所述塑胶件(104)的一侧，所述壳体(40)抵压所述密封件(11)和所述金属压环(105)于所述环形槽(1011)的槽壁上。
  8. 根据权利要求7所述的顶盖组件，其中，所述金属压环(105)和所述极柱(101)焊接连接。
  9. 根据权利要求1至8任一项所述的顶盖组件，还包括正集流盘(107)和内绝缘片(106)，所述正集流盘(107)设置于所述电池的电芯(30)上，所述极柱(101)穿过所述安装孔(401)并抵压所述正集流盘(107)，所述内绝缘片(106)夹设于所述正集流盘(107)和所述壳体(40)的内壁之间。
  10. 一种电池结构，包括电芯(30)、壳体(40)、底盖组件(20)和权利要求1-9任一项所述的顶盖组件(10)，所述电芯(30)位于所述壳体(40)内，所述顶盖组件(10)和所述底盖组件(20)分别设置于所述壳体(40)的两端。
  11. 根据权利要求10所述的电池结构，其中，所述底盖组件(20)包括层叠设置的底盖板(201)和负集流盘(202)，所述底盖组件(20)通过所述负集流盘(202)与所述电芯(30)抵接，且所述底盖组件(20)通过所述底盖板(201)与所述壳体(40)连接。
  12. 根据权利要求11所述的电池结构，其中，所述底盖板(201)朝向所述负集流盘(202)的一面设有凸出的第一凸部(2011)，所述负集流盘(202)朝向所述底盖板(201)的一面设有凸出的第二凸部(2021)，所述第一凸部(2011)与所述第二凸部(2021)抵接，所述第二凸部(2021)设置为调整所述负集流盘(202)和所述底盖板(201)之间的间距。
PCT/CN2022/125700 2022-08-17 2022-10-17 顶盖组件及电池结构 WO2024036736A1 (zh)

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