WO2023246111A1 - 顶盖组件与单体电池 - Google Patents

顶盖组件与单体电池 Download PDF

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Publication number
WO2023246111A1
WO2023246111A1 PCT/CN2023/074622 CN2023074622W WO2023246111A1 WO 2023246111 A1 WO2023246111 A1 WO 2023246111A1 CN 2023074622 W CN2023074622 W CN 2023074622W WO 2023246111 A1 WO2023246111 A1 WO 2023246111A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning
top cover
insulating member
hole
main body
Prior art date
Application number
PCT/CN2023/074622
Other languages
English (en)
French (fr)
Inventor
杨伟
Original Assignee
欣旺达动力科技股份有限公司
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 欣旺达动力科技股份有限公司 filed Critical 欣旺达动力科技股份有限公司
Publication of WO2023246111A1 publication Critical patent/WO2023246111A1/zh

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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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—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
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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

  • the present application relates to the technical field of energy storage devices, and in particular, to a top cover assembly and a single battery.
  • Power battery is an energy supply device for electric vehicles and is one of the important components of electric vehicles.
  • a typical power battery includes a top cover assembly, a casing and a battery core. The cavity of the core is also used to realize the conduction between the battery core and external electrical devices.
  • the top cover assembly is provided with a pole that can realize the electrical connection function.
  • the negative pole it needs to be connected with the top
  • the top cover piece of the cover assembly is kept insulated and needs to be firmly connected to the top cover piece. Therefore, the negative pole in the related art is usually connected to the metal connector through an insulator, and then welded and fixed to the top cover piece through the metal connector.
  • this method requires additional assembly processes to achieve the fixation between the insulator and the pole, as well as between the insulator and the metal connector, which increases the production steps and thus affects the assembly efficiency of the top cover assembly.
  • This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a top cover assembly that can reduce production steps and improve the assembly efficiency of the top cover assembly.
  • This application also proposes a single battery using the above-mentioned top cover assembly.
  • the top cover sheet includes a base plate and an axial positioning part.
  • the base plate has a through hole.
  • the axial positioning part is connected to the base plate and surrounds the through hole;
  • the pole includes a main body part and a flange.
  • the main body part is inserted into the through hole, the flange surrounds the main body part, and the flange is located inside the axial positioning part along the radial direction of the through hole, and is located between the base plate and the axial positioning portion along the axial direction of the through hole;
  • an insulating member is inserted into the through hole and is arranged around the main body, and the insulating member and the axial positioning portion
  • a first directional structure is provided between the main body parts to limit the relative rotation between the insulating member and the main body part, and a second directional structure is provided between the insulating member and the substrate to limit the relative rotation of the insulating member and the main body part. Relative rotation between the insulating member and the substrate.
  • a first directional structure is provided between the insulating member and the main body of the top cover assembly.
  • the first directional structure can limit the relative rotation between the insulating member and the main body.
  • a second directional structure is also provided between the insulating member and the substrate. , the second directional structure can limit the relative rotation between the insulating member and the base plate.
  • the pole can neither rotate relative to the insulating member nor rotate with the insulating member relative to the top cover piece, thereby achieving positioning in the rotation direction, combining the base plate and the base plate.
  • the axial positioning part positions the pole in the axial direction so that the pole can be fixed on the top cover sheet. Compared with the solution that requires welding and other processes to connect the pole and the top cover sheet, the process can be simplified and the assembly efficiency can be improved. .
  • the first orientation structure includes a first positioning groove and a first positioning protrusion.
  • the first positioning groove is provided on the inner peripheral surface of the insulating member.
  • the protrusion is provided on the outer peripheral surface of the main body part, and the first positioning protrusion is located in the first positioning groove.
  • the first orientation structure includes a first positioning groove and a first positioning protrusion
  • the first positioning protrusion is provided on the inner peripheral surface of the insulating member
  • the first positioning protrusion A positioning groove is provided on the outer peripheral surface of the main body, and the first positioning protrusion is located in the first positioning groove.
  • the first orientation structure includes a first positioning surface and a second positioning surface.
  • the first positioning surface is provided on the inner peripheral surface of the insulating member.
  • the second positioning surface It is provided on the outer peripheral surface of the main body part, and the first positioning surface and the second positioning surface are in contact with each other.
  • the first orientation structure includes a first positioning surface and a second positioning surface.
  • the second positioning surface is provided on the inner peripheral surface of the insulating member.
  • the first positioning surface It is provided on the outer peripheral surface of the main body part, and the first positioning surface and the second positioning surface are in contact with each other.
  • the second orientation structure includes a second positioning protrusion and a second positioning groove.
  • the second positioning protrusion is provided on the outer peripheral surface of the insulating member.
  • the second positioning groove Disposed on the hole wall of the through hole, the second positioning protrusion is located in the second positioning groove.
  • the second orientation structure includes a second positioning protrusion and a second positioning groove.
  • the second positioning groove is provided on the outer peripheral surface of the insulating member.
  • the second positioning protrusion Disposed on the hole wall of the through hole, the second positioning protrusion is located in the second positioning groove.
  • the second orientation structure includes a third positioning surface and a fourth positioning surface
  • the The third positioning surface is provided on the outer peripheral surface of the insulating member
  • the fourth positioning surface is provided on the hole wall of the through hole
  • the third positioning surface and the fourth positioning surface fit together.
  • the second orientation structure includes a third positioning surface and a fourth positioning surface, the fourth positioning surface is provided on the outer peripheral surface of the insulating member, and the third positioning surface is provided on On the hole wall of the through hole, the third positioning surface and the fourth positioning surface fit together.
  • the insulating member includes a first insulating part and a second insulating part, the first insulating part is inserted into the through hole and is arranged around the main body part, and the third insulating part Two insulating parts are circumferentially connected to the outside of the first insulating part and are located between the flange and the substrate along the axial direction of the through hole.
  • the flange passes through the second insulating part and the The substrate is in contact; wherein the first directional structure is provided between the first insulating part and the main body part, and the second directional structure is provided between the first insulating part and the substrate.
  • the axial positioning portion is connected to the inner side of the base plate facing the battery core, and the outer end surface of the insulating member away from the battery core is not higher than the end surface of the base plate away from the battery core. outer end face.
  • the axial positioning portion and the base plate define an installation space, and part of the installation space extends into the base plate to form an inner side of the base plate toward the battery core.
  • An installation groove, the axial positioning portion surrounds the installation groove, and the flange is at least partially located within the installation groove.
  • the top cover assembly further includes a sealing member, and the sealing member and the insulating member are respectively located on both sides of the flange along the axial direction of the through hole, and the
  • the seal includes a first sealing portion and a second sealing portion connected to each other.
  • the first sealing portion is disposed between the main body portion and the axial positioning portion.
  • the second sealing portion is disposed on the flange. and the axial positioning part, the flange contacts the axial positioning part through the second sealing part.
  • the single cell in the second embodiment of the present application includes:
  • the top cover assembly described in the above embodiment, the top cover assembly is sealed in the battery case; the battery core is located in the battery case.
  • Figure 1 is a three-dimensional schematic diagram of the top cover assembly in the embodiment of the present application.
  • Figure 2 is an exploded schematic view of the top cover assembly in Figure 1;
  • Figure 3 is a cross-sectional view of a partial area of the top cover sheet in Figure 1;
  • Figure 4 is a cross-sectional view of the top cover assembly in Figure 1;
  • Figure 5 is an enlarged schematic diagram of area A in Figure 4.
  • Figure 6 is a cross-sectional view of a partial area of the top cover sheet in another embodiment of the present application.
  • Figure 7 is a cross-sectional view of a partial area of the top cover assembly in another embodiment of the present application.
  • Figure 8 is an exploded schematic diagram of a single cell in an embodiment of the present application.
  • Top cover assembly 100 top cover sheet 110, base plate 111, through hole 1111, second positioning groove 1112, installation groove 1113, axial positioning part 112, vertical part 1121, horizontal part 1122, installation space 113, pole 120, The main body part 121, the flange 122, the first positioning protrusion 123, the insulating member 130, the first positioning groove 131, the second positioning protrusion 132, the first insulating part 133, the second insulating part 134, the sealing member 140, the first Sealing part 141, second sealing part 142;
  • the top cover assembly 100 includes a top cover sheet 110, a pole 120 and an insulator 130.
  • the top cover 110 is used to seal the battery case of the single cell, and the pole 120 is used to realize the internal battery core and the insulator 130.
  • the insulating member 130 is used to realize the insulation between the pole post 120 and the top cover sheet 110, and the pole post 120 can be positioned through the top cover sheet 110 and the insulating member 130.
  • the top cover piece 110 has a flat structure and is made of metal materials such as aluminum. It has both electrical conductivity and a certain strength to install the pole 120 .
  • the top cover piece 110 includes a base plate 111 and an axial positioning portion 112.
  • the base plate 111 is the main structure of the top cover piece 110, and a through hole 1111 for installing the pole 120 is provided on the base plate 111.
  • the through hole 1111 can It is the round hole shown in the picture.
  • the axial positioning portion 112 is connected to one side in the thickness direction of the base plate 111 , such as the lower side in the figure, and is used to axially fix the pole 120 .
  • An installation space 113 can be defined between the axial positioning portion 112 and the base plate 111 .
  • the pole 120 includes a main body 121 and a flange 122.
  • the flange 122 is arranged around the main body 121 and is used to cooperate with the axial positioning portion 112 to realize the axis of the pole 120.
  • the upper end of the main body part 121 protrudes relative to the flange 122. Taking the example shown in Figure 5, the upper end of the main body part 121 is inserted into the through hole 1111 and exposed from the through hole 1111.
  • the upper end of the main body 121 being exposed from the through hole 1111 means that the upper end is in a contactable state, and it can exceed the upper surface of the substrate 111 as shown in Figure 5. It may be lower than the upper surface of the substrate 111 or flush with the upper surface of the substrate 111 .
  • the flange 122 is located inside the axial positioning part 112 along the radial direction of the through hole 1111, and between the base plate 111 and the axial positioning part 112 along the axial direction of the through hole 1111. That is, the flange 122 is located in the installation space 113. Specifically, both axial ends are provided with flat surfaces, the flange 122 contacts the lower surface of the base plate 111 through the upper surface, and contacts the axial positioning portion 112 through the lower surface, so that the flange 122 can pass through the axis.
  • the positioning part 112 and the base plate 111 restrict the movement of the pole 120 in the axial direction.
  • pole post 120 and the top cover sheet 110 are described as being in contact with each other, it means that the two are in contact through a member with insulating capabilities such as the insulator 130 to avoid direct conduction between the pole post 120 and the top cover sheet 110 . Pass.
  • the insulator 130 is located between the pole 120 and the top cover 110 , specifically inserted into the through hole 1111 , and is arranged around the main body 121 to separate the pole 120 and the top cover 110 to prevent the pole 120 from being connected to the top.
  • the cover piece 110 is directly connected to contact and cause a short circuit.
  • the insulating member 130 can be formed in a variety of ways.
  • the insulating member 130 is an insulating layer formed on the outer peripheral surface of the pole 120 through an integral molding process, for example, a plastic layer formed through an injection molding process, or formed through a sintering process. ceramic layer, thereby reducing assembly steps between the insulator 130 and the pole 120 .
  • the insulating member 130 can also be formed separately and then assembled to the pole 120 .
  • a first directional structure is provided between the insulating member 130 and the main body 121 .
  • the first directional structure can limit the relative rotation between the insulating member 130 and the main body 121 .
  • a second directional structure is also provided between the insulating member 130 and the substrate 111 . Orientation structure, the second orientation structure can limit the relative rotation between the insulator 130 and the base plate 111. In this way, the pole post 120 can neither rotate relative to the insulator 130 nor rotate together with the insulator 130 relative to the top cover 110 to achieve rotation.
  • the pole 120 can be fixed on the top cover sheet 110, and the pole 120 needs to be connected through welding and other processes. Compared with the solution of the top cover sheet 110, the process can be simplified, thereby improving the assembly efficiency.
  • the first directional structure includes a first positioning groove 131 and a first positioning protrusion 123.
  • One of the first positioning groove 131 and the first positioning protrusion 123 is disposed inside the insulating member 130.
  • the other of the first positioning groove 131 and the first positioning protrusion 123 is disposed on the outer circumference of the main body 121 .
  • the first positioning protrusion 123 is located in the first positioning groove 131 to limit the pole post 120 and the insulator 130 relative rotation between them. Taking the examples shown in FIGS.
  • the outer peripheral surface of the main body 121 specifically, the outer peripheral surface of the upper end of the main body 121 is provided with a first positioning protrusion 123
  • the insulating member 130 is provided around the inner peripheral surface of the upper end.
  • the first positioning protrusion 123 can be a rectangular protrusion as shown in the figure, and the first positioning groove 131 is a rectangular groove.
  • the shape of the positioning protrusion and the positioning groove is not limited in this application. It only needs to be able to form a protrusion and a groove. The plug-in matching relationship is sufficient.
  • Each of the first positioning protrusions 123 and the first positioning grooves 131 can be provided in multiple numbers.
  • the outer peripheral surface of the main body 121 is evenly provided with a plurality of first positioning protrusions 123 along the circumferential direction, and the insulating member 130 surrounds the inner periphery of the upper end.
  • a plurality of first positioning grooves 131 are evenly arranged along the circumferential direction.
  • the positioning ability can be increased.
  • the first positioning protrusion 123 fails to align
  • the first positioning groove 131 only needs to be rotated at a small angle to align the first positioning protrusion 123 with the first positioning groove 131, making assembly more convenient.
  • the first directional structure includes a first positioning surface and a second positioning surface, and one of the first positioning surface and the second positioning surface is provided on the inner periphery of the insulating member 130 The other of the first positioning surface and the second positioning surface is provided on the outer peripheral surface of the main body 121 .
  • the first positioning surface and the second positioning surface fit together to also limit the relative rotation between the pole post 120 and the insulator 130 .
  • the outer peripheral surface of the main body 121 specifically, the outer peripheral surface of the upper end of the main body 121 is provided with a first positioning surface
  • the insulating member 130 is provided with a second positioning surface surrounding the inner peripheral surface of the upper end. Both the first positioning surface and the second positioning surface may be planes parallel to the axial direction of the pole 120 .
  • first positioning surfaces and multiple second positioning surfaces can be provided to increase the positioning capability and the convenience of assembling the pole post 120 and the insulating member 130.
  • the upper end of the pole 120 may have a rectangular structure.
  • the second directional structure includes a second positioning protrusion 132 and a second positioning groove 1112.
  • One of the second positioning protrusion 132 and the second positioning groove 1112 is provided on the insulating member 130
  • the other of the second positioning protrusion 132 and the second positioning groove 1112 is disposed on the wall of the through hole 1111.
  • the second positioning protrusion 132 is located in the second positioning groove 1112 to limit the insulating member 130 and the top cover. relative rotation between the pieces 110. Taking the examples shown in FIGS.
  • the outer peripheral surface of the insulating member 130 specifically the outer peripheral surface corresponding to the wall of the through hole 1111 is provided with a second positioning protrusion 132
  • the wall of the through hole 1111 is provided with a second positioning protrusion 132 .
  • a plurality of second positioning protrusions 132 and second positioning grooves 1112 may be provided to increase positioning capability and convenience in assembling the insulating member 130 and the top cover sheet 110 .
  • first positioning protrusions 123 and the second positioning protrusions 132 may be the same or different.
  • the second orientation structure includes a third positioning surface and a fourth positioning surface.
  • One of the third positioning surface and the fourth positioning surface is provided on the outer peripheral surface of the insulating member 130.
  • the other of the three positioning surfaces and the fourth positioning surface is disposed on the hole wall of the through hole 1111 .
  • the third positioning surface and the fourth positioning surface fit together, which can also limit the relative rotation between the insulating member 130 and the top cover sheet 110 .
  • the through hole 1111 may be a rectangular hole.
  • the axial positioning part 112 includes a vertical part 1121 and a horizontal part 1122.
  • An installation space 113 can be defined between the axial positioning part 112 and the base plate 111 to accommodate
  • the upper surface of the flange 122 of the pole 120 can be in contact with the base plate 111 , and the lower surface can be in contact with the horizontal portion 1122 of the pole 120 , thereby achieving axial fixation of the pole 120 .
  • the axial positioning part 112 and the base plate 111 can be connected to form an integrated structure.
  • a cylindrical thin-walled structure is formed on the lower surface of the base plate 111 , and the thin-walled structure is arranged around the through hole 1111 , and the lower part of the thin-walled structure is formed along the It is bent radially inward, and the bent part forms the above-mentioned horizontal part 1122.
  • the insulation between the pole 120 and the top cover sheet 110 is completed by the insulating member 130 .
  • the insulator 130 covers the pole 120 and can directly contact the outer peripheral surface of the top cover sheet 110 .
  • the insulating member 130 may also cooperate with other components such as the sealing member 140 described below to jointly achieve insulation between the pole post 120 and the top cover sheet 110 .
  • the insulating member 130 covers the pole 120, it can directly contact part of the outer peripheral surface of the top cover sheet 110.
  • the insulating member 130 includes a first insulating part 133 and a second insulating part 134.
  • the first insulating part 133 is arranged along the axial direction of the pole 120 and is plugged in. It is disposed in the through hole 1111 and surrounds the main body 121 to isolate the upper end of the main body 121 from the substrate 111 .
  • the second insulating part 134 is connected around the outside of the first insulating part 133 and is arranged along the radial direction of the pole 120.
  • the second insulating part 134 is located between the flange 122 and the base plate 111, thereby isolating the flange 122 and the base plate 111.
  • the flange 122 is in contact with the substrate 111 through the second insulating portion 134, thereby achieving axial positioning of the flange 122 while ensuring insulation.
  • a first directional structure is provided between the first insulating part 133 and the main body part 121, and a second directional structure is provided between the first insulating part 133 and the substrate 111.
  • the first The inner peripheral surface of the insulating part 133 is provided with a first positioning groove 131
  • the outer peripheral surface of the upper end of the main body part 121 is provided with a first positioning protrusion 123
  • the inner peripheral surface of the first insulating part 133 is provided with a second positioning protrusion 132.
  • the hole wall of the through hole 1111 is provided with a second positioning groove 1112.
  • the axial positioning portion 112 is connected to the inner side of the base plate 111 facing the battery core 300 , such as the lower side in the figure, and the outer end surface of the insulator 130 away from the battery core 300 is no higher than the end surface of the base plate 111 away from the battery core 300 .
  • This can prevent the axial positioning part 112 and the insulating member 130 from protruding from the outer end surface of the base plate 111 to form a protruding structure, making the outer end face of the base plate 111 more regular, which facilitates the assembly of single cells into battery modules.
  • the end face of the upper end can be flush with the outer end face of the base plate 111, lower than the outer end face of the base plate 111, or slightly higher than the outer end face of the base plate 111.
  • the height difference between the upper end surface of the pole 120 and the outer end surface of the base plate 111 should be controlled within a set range, for example, the height difference is within 1 mm to 3 mm to avoid obvious heights on the outer end surface of the base plate 111 Uneven structure.
  • part of the installation space 113 extends into the base plate 111 to form an installation groove 1113 on the inner side of the base plate 111 facing the battery core 300 , and the axial positioning portion 112 Surrounding the mounting groove 1113, that is, the thickness of the base plate 111 located on the inner ring of the axial positioning part 112 is smaller than the thickness of the base plate 111 located on the outer ring of the axial positioning part 112, and the flange 122 is partially or entirely located in the mounting groove 1113, and Compared with the embodiment shown in Figure 5, this embodiment uses a part of the thickness space of the substrate 111 to install the flange 122, which can reduce the overall height of the pole 120, thereby reducing the overall thickness of the top cover assembly 100. When the total height of the single cell is not On the basis of the change, the height of the battery core can be increased, thereby increasing the energy density of the single battery.
  • the top cover assembly 100 also includes a seal 140.
  • the pole 120 and the top cover sheet 110 are insulated together by the insulator 130 and the seal 140, and are sealed by the seal 140.
  • the sealing member 140 and the insulating member 130 are respectively located on both sides of the flange 122, thereby respectively achieving insulation between the flange 122 and the base plate 111, and axial positioning between the flange 122 and the base plate 111. insulation between parts 112, with Overall, the seal 140 includes a first sealing part 141 and a second sealing part 142 that are connected to each other.
  • the first sealing part 141 is arranged along the axial direction of the pole 120 and is located between the main body part 121 and the axial positioning part 112. For example, when the lower end of the main body 121 also extends toward the battery core relative to the flange 122, the first sealing portion 141 is located between the outer peripheral surface of the lower end of the main body 121 and the horizontal portion 1122 of the axial positioning portion 112. When the lower end of the main body part 121 is flush with the lower surface of the flange 122 , the first sealing part 141 is located between the outer peripheral surface of the lower end of the main body part 121 and the vertical part 1121 of the axial positioning part 112 .
  • the second sealing part 142 is connected to the outside of the first sealing part 141 and is disposed along the radial direction of the pole 120 .
  • the second sealing part 142 is disposed between the flange 122 and the axial positioning part 112 , for example, on the flange 122 At the same time, the flange 122 contacts the horizontal portion 1122 of the axial positioning portion 112 through the second sealing portion 142 to achieve axial positioning of the flange 122 while ensuring insulation.
  • the embodiment of the present application also proposes a single battery, including a battery case 200, a top cover assembly 100 and a battery core 300.
  • the top cover assembly 100 is connected to the opening of the battery case 200 by welding or other methods, thereby connecting with the battery case.
  • the two bodies jointly define an installation cavity, and the battery core 300 is located in the installation cavity.

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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)
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Abstract

本申请公开了一种顶盖组件与单体电池，顶盖组件包括顶盖片、极柱与绝缘件，顶盖片包括基板与轴向定位部，基板具有通孔，轴向定位部连接于基板且环绕于通孔；极柱包括主体部与凸缘，主体部插接于通孔内，凸缘环绕于主体部，凸缘沿通孔的径向位于轴向定位部的内侧，沿通孔的轴向位于基板以及轴向定位部之间；绝缘件插接在通孔内，且环绕主体部设置，绝缘件和主体部之间设置有第一定向结构，以限制绝缘件与主体部之间的相对转动，绝缘件和基板之间设置有第二定向结构，以限制绝缘件与基板之间的相对转动。本申请的顶盖组件能够简化工艺，从而提升组装效率。

Description

顶盖组件与单体电池
相关申请的交叉引用
本申请要求于2022年06月24日提交中国专利局、申请号为202221618079.0、发明名称为“顶盖组件与单体电池”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及储能器件技术领域，尤其是涉及一种顶盖组件与单体电池。
背景技术
动力电池是作为电动汽车的供能器件，是电动汽车的重要组成部分之一，典型的动力电池包括顶盖组件、壳体与电芯，顶盖组件一方面用于与壳体共同形成放置电芯的腔体，同时还用于实现电芯与外部用电器件的导通，基于此，顶盖组件上设置有能够实现电连接功能的极柱，对于负极柱而言，其既需要与顶盖组件的顶盖片保持绝缘，又需要稳固的连接在顶盖片上，因此，相关技术中的负极柱通常通过绝缘件与金属连接件连接，再通过金属连接件与顶盖片焊接固定，然而，这种方式需要通过额外的装配工艺实现绝缘件与极柱之间，以及绝缘件与金属连接件之间的固定，增加了生产步骤，从而影响顶盖组件的装配效率。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种顶盖组件，能够减少生产步骤，提升顶盖组件的装配效率。
本申请还提出了一种应用上述顶盖组件的单体电池。
根据本申请第一实施例中的顶盖组件，包括：
顶盖片，包括基板与轴向定位部，所述基板具有通孔，所述轴向定位部连接于所述基板，且环绕于所述通孔；极柱，包括主体部与凸缘，所述主体部插接在所述通孔内，所述凸缘环绕于所述主体部，所述凸缘沿所述通孔的径向位于所述轴向定位部的内侧， 且沿所述通孔的轴向位于所述基板以及所述轴向定位部之间；绝缘件，插接在所述通孔内，且环绕所述主体部设置，所述绝缘件和所述主体部之间设置有第一定向结构，以限制所述绝缘件与所述主体部之间的相对转动，所述绝缘件和所述基板之间设置有第二定向结构，以限制所述绝缘件与所述基板之间的相对转动。
根据本申请实施例的顶盖组件，至少具有如下有益效果：
顶盖组件的绝缘件和主体部之间设置有第一定向结构，第一定向结构能够限制绝缘件与主体部之间的相对转动，绝缘件和基板之间还设置有第二定向结构，第二定向结构能够限制绝缘件与基板之间的相对转动，如此，极柱既不能相对绝缘件转动，也不能与绝缘件一起相对顶盖片转动，实现转动方向上的定位，结合基板与轴向定位部对极柱轴向上的定位，使得极柱能够被固定在顶盖片上，与需要通过焊接等工艺连接极柱与顶盖片的方案相比，能够简化工艺，从而提升组装效率。
在本申请的其他实施例中，所述第一定向结构包括第一定位槽和第一定位凸起，所述第一定位槽设置于所述绝缘件的内周面，所述第一定位凸起设置于所述主体部的外周面，所述第一定位凸起位于所述第一定位槽内。
在本申请的其他实施例中，所述第一定向结构包括第一定位槽和第一定位凸起，所述第一定位凸起设置于所述绝缘件的内周面，所述第一定位槽设置于所述主体部的外周面，所述第一定位凸起位于所述第一定位槽内。
在本申请的其他实施例中，所述第一定向结构包括第一定位面与第二定位面，所述第一定位面设置于所述绝缘件的内周面，所述第二定位面设置于所述主体部的外周面，所述第一定位面与所述第二定位面贴合。
在本申请的其他实施例中，所述第一定向结构包括第一定位面与第二定位面，所述第二定位面设置于所述绝缘件的内周面，所述第一定位面设置于所述主体部的外周面，所述第一定位面与所述第二定位面贴合。
在本申请的其他实施例中，所述第二定向结构包括第二定位凸起与第二定位槽，所述第二定位凸起设置于所述绝缘件的外周面，所述第二定位槽设置于所述通孔的孔壁，所述第二定位凸起位于所述第二定位槽内。
在本申请的其他实施例中，所述第二定向结构包括第二定位凸起与第二定位槽，所述第二定位槽设置于所述绝缘件的外周面，所述第二定位凸起设置于所述通孔的孔壁，所述第二定位凸起位于所述第二定位槽内。
在本申请的其他实施例中，所述第二定向结构包括第三定位面与第四定位面，所述 第三定位面设置于所述绝缘件的外周面，所述第四定位面设置于所述通孔的孔壁，所述第三定位面与所述第四定位面贴合。
在本申请的其他实施例中，所述第二定向结构包括第三定位面与第四定位面，所述第四定位面设置于所述绝缘件的外周面，所述第三定位面设置于所述通孔的孔壁，所述第三定位面与所述第四定位面贴合。
在本申请的其他实施例中，所述绝缘件包括第一绝缘部与第二绝缘部，所述第一绝缘部插接在所述通孔内，且环绕所述主体部设置，所述第二绝缘部环绕连接于所述第一绝缘部的外侧，且沿所述通孔的轴向位于所述凸缘与所述基板之间，所述凸缘通过所述第二绝缘部与所述基板抵接；其中，所述第一绝缘部与所述主体部之间设置有所述第一定向结构，所述第一绝缘部与所述基板之间设置有所述第二定向结构。
在本申请的其他实施例中，所述轴向定位部连接于所述基板朝向电芯的内侧，所述绝缘件远离所述电芯的外端面不高于所述基板远离所述电芯的外端面。
在本申请的其他实施例中，所述轴向定位部与所述基板限定出安装空间，所述安装空间的部分延伸至所述基板内，以在所述基板朝向所述电芯的内侧形成安装槽，所述轴向定位部环绕于所述安装槽，所述凸缘至少部分位于所述安装槽内。
在本申请的其他实施例中，所述顶盖组件还包括密封件，沿所述通孔的轴向上，所述密封件与所述绝缘件分别位于所述凸缘的两侧，所述密封件包括相互连接的第一密封部与第二密封部，所述第一密封部设置在所述主体部和所述轴向定位部之间，所述第二密封部设置在所述凸缘和所述轴向定位部之间，所述凸缘通过所述第二密封部与所述轴向定位部抵接。
根据本申请第二实施例中的单体电池，包括：
电池壳体；上述实施例中所述的顶盖组件，所述顶盖组件盖封于所述电池壳体；电芯，位于所述电池壳体内。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
下面结合附图和实施例对本申请做进一步的说明，其中：
图1为本申请实施例中顶盖组件的立体示意图；
图2为图1中顶盖组件的分解示意图；
图3为图1中顶盖片局部区域的剖视图；
图4为图1中顶盖组件的剖视图；
图5为图4中A区域的放大示意图；
图6为本申请另一实施例中顶盖片局部区域的剖视图；
图7为本申请另一实施例中顶盖组件局部区域的剖视图；
图8为本申请实施例中单体电池的分解示意图。
附图标记：
顶盖组件100、顶盖片110、基板111、通孔1111、第二定位槽1112、安装槽1113、轴向定位部112、竖直部分1121、水平部分1122、安装空间113、极柱120、主体部121、凸缘122、第一定位凸起123、绝缘件130、第一定位槽131、第二定位凸起132、第一绝缘部133、第二绝缘部134、密封件140、第一密封部141、第二密封部142；
电池壳体200；
电芯300。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，涉及到方位描述，例如上、下、前、后、左、右等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，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。
在本申请的描述中，若干的含义是一个以上，多个的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。如果有描述到第一、第二只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。
本申请的描述中，除非另有明确的限定，设置、安装、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本申请中的具体含义。
本申请的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、 “示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
参照图1、图2，顶盖组件100包括顶盖片110、极柱120与绝缘件130，顶盖片110用于封闭单体电池的电池壳体，极柱120用于实现内部电芯与外部用电器件的电连接，绝缘件130用于实现极柱120与顶盖片110之间的绝缘，且极柱120能够通过顶盖片110与绝缘件130进行定位，以下结合附图进行具体说明。
顶盖片110为平板状结构，由铝等金属材料制成，既具有导电能力，又具有一定的强度以安装极柱120。参照图2、图3，顶盖片110包括基板111与轴向定位部112，基板111为顶盖片110的主体结构，其上设置有用于安装极柱120的通孔1111，通孔1111可以是图示的圆孔。轴向定位部112连接于基板111厚度方向的一侧，例如图中的下侧，用于对极柱120进行轴向固定，轴向定位部112与基板111之间能够限定出安装空间113。
极柱120的一端(例如下端)用于与电芯的极耳电连接，另一端(例如上端)用于与外部用电器件电连接。参照图2、图4与图5，极柱120包括主体部121与凸缘122，其中，凸缘122环绕于主体部121设置，用于与轴向定位部112配合以实现极柱120的轴向固定。沿极柱120的轴向，至少主体部121的上端相对凸缘122伸出，以图5所示为例，主体部121的上端穿设于通孔1111中，并从通孔1111中露出，从而能够与外部用电器件进行连接，需要说明的是，主体部121的上端从通孔1111中露出是指上端处于可接触的状态，其可以如图5所示超出基板111的上表面，也可以低于基板111的上表面或者与基板111的上表面平齐。
凸缘122沿通孔1111的径向位于轴向定位部112的内侧，沿通孔1111的轴向位于基板111以及轴向定位部112之间，也即凸缘122位于安装空间113内，具体的，其轴向的两端均设置有平面，凸缘122通过上侧的平面与基板111的下表面抵接，并通过下侧的平面与轴向定位部112抵接，这样就能够通过轴向定位部112与基板111限制极柱120沿轴向的移动。需要说明的是，当描述极柱120与顶盖片110抵接时，是指二者通过例如绝缘件130等具有绝缘能力的构件进行抵接，以避免极柱120与顶盖片110直接导通。
绝缘件130位于极柱120与顶盖片110之间，具体是插接于通孔1111内，且环绕主体部121设置，用于分隔极柱120与顶盖片110，避免极柱120与顶盖片110直接接 触而造成短路。绝缘件130有多种形成方式，在一些实施例中，绝缘件130为通过一体成型工艺形成在极柱120外周面的绝缘层，例如，通过注塑工艺形成的塑胶层，或者通过烧结工艺形成的陶瓷层，从而减少绝缘件130与极柱120之间的装配步骤。绝缘件130也可以单独成型，然后装配至极柱120上。
绝缘件130和主体部121之间设置有第一定向结构，第一定向结构能够限制绝缘件130与主体部121之间的相对转动，绝缘件130和基板111之间还设置有第二定向结构，第二定向结构能够限制绝缘件130与基板111之间的相对转动，如此，极柱120既不能相对绝缘件130转动，也不能与绝缘件130一起相对顶盖片110转动，实现转动方向上的完全定位，结合上述基板111与轴向定位部112对极柱120轴向上的完全定位，极柱120能够被固定在顶盖片110上，与需要通过焊接等工艺连接极柱120与顶盖片110的方案相比，能够简化工艺，从而提升组装效率。
作为第一定向结构的一种具体实施例，其包括第一定位槽131和第一定位凸起123，第一定位槽131和第一定位凸起123中之一设置于绝缘件130的内周面，第一定位槽131和第一定位凸起123中另一设置于主体部121的外周面，第一定位凸起123位于第一定位槽131内，以限制极柱120与绝缘件130之间的相对转动。以图2与图5中所示为例，主体部121的外周面，具体是，主体部121的上端的外周面设置有第一定位凸起123，而绝缘件130环绕上端的内周面设置有第一定位槽131。第一定位凸起123可以是图中的矩形凸起，第一定位槽131相应为矩形凹槽，但本申请并未限制定位凸起与定位槽的形状，只需要能够形成凸起与凹槽的插接配合关系即可。
第一定位凸起123与第一定位槽131均可以设置为多个，例如，主体部121的外周面沿周向均匀设置有多个第一定位凸起123，绝缘件130环绕上端的内周面沿周向均匀设置有多个第一定位槽131，一方面能够增加定位能力，另一方面，当需要将绝缘件130装配至极柱120上时，如果第一定位凸起123未能对准第一定位槽131，只需转动较小角度就可以使第一定位凸起123对准第一定位槽131，装配更为方便。
作为第一定向结构的另一种具体实施例，第一定向结构包括第一定位面与第二定位面，第一定位面与第二定位面中之一设置于绝缘件130的内周面，第一定位面与第二定位面中另一设置于主体部121的外周面，第一定位面与第二定位面贴合，同样限制极柱120与绝缘件130之间的相对转动。例如，主体部121的外周面，具体是，主体部121的上端的外周面设置有第一定位面，而绝缘件130环绕上端的内周面设置有第二定位面。第一定位面与第二定位面均可以是平行于极柱120轴向的平面。
与上述第一定位凸起123以及第一定位槽131类似，第一定位面与第二定位面均可以设置为多个，以增加定位能力以及极柱120与绝缘件130装配时的便捷性，此时，极柱120的上端可以是矩形结构。
作为第二定向结构的一种具体实施例，第二定向结构包括第二定位凸起132与第二定位槽1112，第二定位凸起132与第二定位槽1112中之一设置于绝缘件130的外周面，第二定位凸起132与第二定位槽1112中另一设置于通孔1111的孔壁，第二定位凸起132位于第二定位槽1112内，以限制绝缘件130与顶盖片110之间的相对转动。以图2与图5中所示为例，绝缘件130的外周面，具体是对应于通孔1111孔壁的外周面设置有第二定位凸起132，通孔1111的孔壁设置有第二定位槽1112。
第二定位凸起132与第二定位槽1112均可以设置为多个，以增加定位能力以及绝缘件130与顶盖片110装配时的便捷性。
需要说明的是，第一定位凸起123与第二定位凸起132形状与数量可以相同，也可以不同。
作为第二定向结构的另一种具体实施例，第二定向结构包括第三定位面与第四定位面，第三定位面与第四定位面中之一设置于绝缘件130的外周面，第三定位面与第四定位面中另一设置于通孔1111的孔壁，第三定位面与第四定位面贴合，同样能够限制绝缘件130与顶盖片110之间的相对转动。
与上述第二定位凸起132与第二定位槽1112类似，第三定位面与第四定位面也可以设置为多个，以增加定位能力以及绝缘件130与顶盖片110装配时的便捷性，此时，通孔1111可以是矩形孔。
作为轴向定位部112的一种具体实施例，参照图3，轴向定位部112包括竖直部分1121与水平部分1122，轴向定位部112与基板111之间能够限定出安装空间113以容纳极柱120的凸缘122，凸缘122的上表面能够与基板111抵接，下表面能够与极柱120的水平部分1122抵接，从而实现极柱120的轴向固定。轴向定位部112与基板111可以连接为一体结构，例如，在基板111的下表面成型出圆筒状的薄壁结构，薄壁结构环绕通孔1111设置，并将薄壁结构的下部分沿径向向内侧弯折，被弯折的部分形成上述的水平部分1122。
极柱120与顶盖片110之间的绝缘均由绝缘件130完成，此时，绝缘件130覆盖极柱120，能够直接接触顶盖片110的外周面。在另一些实施例中，绝缘件130也可以与例如下述密封件140等其他构件配合以共同实现极柱120与顶盖片110之间的绝缘，此 时，绝缘件130覆盖极柱120，能够直接接触顶盖片110的部分外周面。作为绝缘件130的一种具体实施例，参照图3、图5，绝缘件130包括第一绝缘部133与第二绝缘部134，第一绝缘部133沿极柱120的轴向设置并插接在通孔1111内，且环绕主体部121设置，从而隔离主体部121的上端与基板111。第二绝缘部134环绕连接于第一绝缘部133的外侧，且沿极柱120的径向设置，第二绝缘部134位于凸缘122与基板111之间，从而隔离凸缘122与基板111，同时，凸缘122通过第二绝缘部134与基板111抵接，在保证绝缘的基础上实现凸缘122轴向的定位。
基于上述结构，第一绝缘部133与主体部121之间设置有第一定向结构，第一绝缘部133与基板111之间设置有第二定向结构，以图中所示为例，第一绝缘部133的内周面设置有第一定位槽131，主体部121的上端的外周面设置有第一定位凸起123，第一绝缘部133的内周面设置有第二定位凸起132，通孔1111的孔壁设置有第二定位槽1112。
在一些实施例中，轴向定位部112连接于基板111朝向电芯300的内侧，例如图中的下侧，并且绝缘件130远离电芯300的外端面不高于基板111远离电芯300的外端面，这样能够避免轴向定位部112与绝缘件130突出于基板111的外端面形成突出结构，使得基板111的外端面更为规整，便于单体电池组装为电池模组。相应的，当极柱120的上端穿设于通孔1111时，上端的端面可以与基板111的外端面平齐、低于基板111的外端面或者略高于基板111的外端面，对于后两种情形，极柱120上端的端面与基板111的外端面之间的高度差应该控制在设定范围内，例如，高度差在1mm至3mm之内，以避免基板111的外端面形成明显的高低不平结构。
基于上述结构，在一些进一步的实施例中，参照图6、图7，安装空间113的部分延伸至基板111内，以在基板111朝向电芯300的内侧形成安装槽1113，轴向定位部112环绕于安装槽1113，也即，位于轴向定位部112内圈的基板111的厚度小于位于轴向定位部112外圈的基板111的厚度，凸缘122部分或者全部位于安装槽1113内，与图5所示实施例相比，本实施例利用基板111的一部分厚度空间安装凸缘122，可以降低极柱120的总高度，从而降低顶盖组件100的总厚度，在单体电池总高不变的基础上，可以增加电芯的高度，从而提升单体电池的能量密度。
参照图2、图5与图7，顶盖组件100还包括密封件140，极柱120与顶盖片110之间通过绝缘件130与密封件140共同实现绝缘，并通过密封件140进行密封，具体的，沿通孔1111的轴向上，密封件140与绝缘件130分别位于凸缘122的两侧，从而分别实现凸缘122与基板111之间的绝缘，以及凸缘122与轴向定位部112之间的绝缘，具 体的，密封件140包括相互连接的第一密封部141与第二密封部142，第一密封部141沿极柱120的轴向设置，并位于主体部121和轴向定位部112之间，例如，当主体部121的下端也相对凸缘122朝电芯的方向伸出时，则第一密封部141位于主体部121下端的外周面与轴向定位部112的水平部分1122之间，当主体部121的下端与凸缘122的下表面平齐时，则第一密封部141位于主体部121下端的外周面与轴向定位部112的竖直部分1121之间。第二密封部142连接于第一密封部141的外侧，并沿极柱120的径向设置，第二密封部142设置在凸缘122和轴向定位部112之间，例如，位于凸缘122与轴向定位部112的水平部分1122之间，同时，凸缘122通过第二密封部142与轴向定位部112抵接，在保证绝缘的基础上实现凸缘122轴向的定位。
本申请实施例还提出了一种单体电池，包括电池壳体200、顶盖组件100与电芯300，顶盖组件100通过焊接等方式连接于电池壳体200的开口处，从而与电池壳体共同限定出一安装腔，电芯300位于该安装腔内。
上面结合附图对本申请实施例作了详细说明，但是本申请不限于上述实施例，在所属技术领域普通技术人员所具备的知识范围内，还可以在不脱离本申请宗旨的前提下作出各种变化。此外，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。

Claims (14)

  1. 一种顶盖组件，其特征在于，包括：
    顶盖片，包括基板与轴向定位部，所述基板具有通孔，所述轴向定位部连接于所述基板，且环绕于所述通孔；
    极柱，包括主体部与凸缘，所述主体部插接在所述通孔内，所述凸缘环绕于所述主体部，所述凸缘沿所述通孔的径向位于所述轴向定位部的内侧，且沿所述通孔的轴向位于所述基板以及所述轴向定位部之间；
    绝缘件，插接在所述通孔内，且环绕所述主体部设置，所述绝缘件和所述主体部之间设置有第一定向结构，以限制所述绝缘件与所述主体部之间的相对转动，所述绝缘件和所述基板之间设置有第二定向结构，以限制所述绝缘件与所述基板之间的相对转动。
  2. 根据权利要求1所述的顶盖组件，其特征在于，所述第一定向结构包括第一定位槽和第一定位凸起，所述第一定位槽设置于所述绝缘件的内周面，所述第一定位凸起设置于所述主体部的外周面，所述第一定位凸起位于所述第一定位槽内。
  3. 根据权利要求1所述的顶盖组件，其特征在于，所述第一定向结构包括第一定位槽和第一定位凸起，所述第一定位凸起设置于所述绝缘件的内周面，所述第一定位槽设置于所述主体部的外周面，所述第一定位凸起位于所述第一定位槽内。
  4. 根据权利要求1所述的顶盖组件，其特征在于，所述第一定向结构包括第一定位面与第二定位面，所述第一定位面设置于所述绝缘件的内周面，所述第二定位面设置于所述主体部的外周面，所述第一定位面与所述第二定位面贴合。
  5. 根据权利要求1所述的顶盖组件，其特征在于，所述第一定向结构包括第一定位面与第二定位面，所述第二定位面设置于所述绝缘件的内周面，所述第一定位面设置于所述主体部的外周面，所述第一定位面与所述第二定位面贴合。
  6. 根据权利要求1所述的顶盖组件，其特征在于，所述第二定向结构包括第二定位凸起与第二定位槽，所述第二定位凸起设置于所述绝缘件的外周面，所述第二定位槽设置于所述通孔的孔壁，所述第二定位凸起位于所述第二定位槽内。
  7. 根据权利要求1所述的顶盖组件，其特征在于，所述第二定向结构包括第二定位凸起与第二定位槽，所述第二定位槽设置于所述绝缘件的外周面，所述第二定位凸起设置于所述通孔的孔壁，所述第二定位凸起位于所述第二定位槽内。
  8. 根据权利要求1所述的顶盖组件，其特征在于，所述第二定向结构包括第三定位 面与第四定位面，所述第三定位面设置于所述绝缘件的外周面，所述第四定位面设置于所述通孔的孔壁，所述第三定位面与所述第四定位面贴合。
  9. 根据权利要求1所述的顶盖组件，其特征在于，所述第二定向结构包括第三定位面与第四定位面，所述第四定位面设置于所述绝缘件的外周面，所述第三定位面设置于所述通孔的孔壁，所述第三定位面与所述第四定位面贴合。
  10. 根据权利要求1所述的顶盖组件，其特征在于，所述绝缘件包括第一绝缘部与第二绝缘部，所述第一绝缘部插接在所述通孔内，且环绕所述主体部设置，所述第二绝缘部环绕连接于所述第一绝缘部的外侧，且沿所述通孔的轴向位于所述凸缘与所述基板之间，所述凸缘通过所述第二绝缘部与所述基板抵接；
    其中，所述第一绝缘部与所述主体部之间设置有所述第一定向结构，所述第一绝缘部与所述基板之间设置有所述第二定向结构。
  11. 根据权利要求1所述的顶盖组件，其特征在于，所述轴向定位部连接于所述基板朝向电芯的内侧，所述绝缘件远离所述电芯的外端面不高于所述基板远离所述电芯的外端面。
  12. 根据权利要求11所述的顶盖组件，其特征在于，所述轴向定位部与所述基板限定出安装空间，所述安装空间的部分延伸至所述基板内，以在所述基板朝向所述电芯的内侧形成安装槽，所述轴向定位部环绕于所述安装槽，所述凸缘至少部分位于所述安装槽内。
  13. 根据权利要求1所述的顶盖组件，其特征在于，所述顶盖组件还包括密封件，沿所述通孔的轴向上，所述密封件与所述绝缘件分别位于所述凸缘的两侧，所述密封件包括相互连接的第一密封部与第二密封部，所述第一密封部设置在所述主体部和所述轴向定位部之间，所述第二密封部设置在所述凸缘和所述轴向定位部之间，所述凸缘通过所述第二密封部与所述轴向定位部抵接。
  14. 一种单体电池，其特征在于，包括：
    电池壳体；
    权利要求1至13中任一项所述的顶盖组件，所述顶盖组件盖封于所述电池壳体；
    电芯，位于所述电池壳体内。
PCT/CN2023/074622 2022-06-24 2023-02-06 顶盖组件与单体电池 WO2023246111A1 (zh)

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CN117199654A (zh) * 2023-06-08 2023-12-08 中创新航科技集团股份有限公司 盖板组件、电池
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