WO2020063584A1 - 顶盖组件及其制造方法、顶盖板的制造方法和电池单体 - Google Patents

顶盖组件及其制造方法、顶盖板的制造方法和电池单体 Download PDF

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Publication number
WO2020063584A1
WO2020063584A1 PCT/CN2019/107513 CN2019107513W WO2020063584A1 WO 2020063584 A1 WO2020063584 A1 WO 2020063584A1 CN 2019107513 W CN2019107513 W CN 2019107513W WO 2020063584 A1 WO2020063584 A1 WO 2020063584A1
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WO
WIPO (PCT)
Prior art keywords
top cover
seal
electrode terminal
cover plate
groove
Prior art date
Application number
PCT/CN2019/107513
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English (en)
French (fr)
Inventor
杨剑雄
邢承友
王鹏
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2020063584A1 publication Critical patent/WO2020063584A1/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 of a single cell or a single battery
    • 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 of a single cell or a single battery
    • 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
    • H01M50/50—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 invention relates to the technical field of energy storage devices, in particular to a top cover assembly and a manufacturing method thereof, a manufacturing method of a top cover plate and a battery cell.
  • the battery cell generally adopts a square hard shell structure.
  • the battery cell includes a case and a top cover assembly.
  • the battery cell housing provides a closed space to accommodate the electrode assembly and the electrolyte.
  • the electrode terminal is led out from the closed space to the outside of the closed space.
  • the top cover is a metal plate and an electrode lead-out hole is provided.
  • a seal is provided between the top cover and the electrode terminal.
  • the seal itself does not have a limiting structure, and it is easy to move, which leads to seal failure and affects the use of the battery cell.
  • a top cover assembly of a battery cell including:
  • the top cover plate has an electrode lead-out hole
  • the electrode terminal is fixed on the top cover plate by a fixing member, the electrode terminal is located on one side of the top cover plate and covers the electrode lead-out hole, and is disposed between the electrode terminal and the top cover plate. There is a sealing member to seal the electrode lead-out hole;
  • One of the seal and the top cover is provided with a convex portion, and the other is provided with a concave portion accommodating the convex portion, and the convex portion and the concave portion cooperate with each other to limit displacement of the seal. .
  • a groove is provided at the bottom of the seal, a protrusion is provided on the top cover plate, and the groove is matched with the protrusion.
  • the groove is an annular groove
  • the protrusion is an annular protrusion.
  • the distance from the groove to the outer wall surface of the seal is greater than the distance from the groove to the seal. The distance of the inner wall surface.
  • the fixing member includes an upper insulating member and a welding piece, and the upper insulating member, the welding piece, and the electrode terminal are integrally injection-molded.
  • an outer wall surface of the sealing member is in close contact with an inner wall surface of the upper insulating member.
  • the bottom of the upper insulating member has a first step and a second step from bottom to top, and an outer wall surface of the seal member is in close contact with an inner wall surface of the first step, at least in part.
  • the seal is located on the second step.
  • the top cover assembly further includes a lower insulating member, the lower insulating member has a through hole opposite to the electrode lead-out hole, and a protrusion is provided on a periphery of the through hole, so that The protrusion is received in the electrode lead-out hole.
  • the top of the raised portion is in close contact with the bottom of the inner wall surface of the seal.
  • the top of the raised portion is in close contact with the bottom of a portion of the sealing member located in the electrode lead-out hole.
  • the electrode terminal includes a positive electrode terminal and a negative electrode terminal, and a seal between the positive electrode terminal and the top cover plate is a conductive seal, and the conductive seals are respectively The positive electrode terminal and the top cover are electrically connected, and a seal between the negative electrode terminal and the top cover is an insulating seal.
  • the compression amount of the seal is 30% ⁇ 15%.
  • a sealing member is provided between the electrode terminal and the top cover plate to seal the electrode lead-out hole, and one of the sealing member and the top cover plate is provided with a convex portion.
  • the other is provided with a recess for accommodating the projection, and the projection and the recess cooperate with each other to limit the displacement of the seal.
  • the convex part and the concave part cooperate with each other to prevent the sealing member from moving at will during use, thereby ensuring the tightness of the battery cell and improving the service life of the battery cell.
  • a method for manufacturing a top cover plate which includes:
  • An electrode lead-through hole is formed in the metal plate and penetrates in the thickness direction;
  • a first groove and a protrusion are provided in a part of the metal plate surrounding the electrode lead-out hole, the first groove is recessed toward the second surface with respect to the first surface, and the protrusion is opposite to The bottom surface of the first groove protrudes and surrounds the outside of the electrode lead-out hole.
  • a portion of the metal plate located on the first surface and surrounding the electrode lead-out hole is punched to form the first groove.
  • a portion of the metal plate located on the second surface and surrounding the electrode lead-out hole is punched to form a second groove and the protrusion that are recessed toward the first surface with respect to the second surface.
  • the top cover plate manufactured by the above manufacturing method has protrusions, and the protrusions can be concave-convexly matched with the seal to limit the displacement of the seal and prevent the seal from moving at will during use, thereby ensuring the battery cell.
  • the tightness improves the service life of battery cells.
  • a method for manufacturing a top cover assembly which includes:
  • the fixing member is fixed to the top cover plate.
  • the fixing member provided includes an upper insulating member and a welding piece.
  • the bottom of the upper insulating member has a first step and a second step from top to bottom.
  • the welding piece and the electrode terminal are integrally injection-molded. When the electrode terminal compresses the seal, an outer wall surface of the seal is in contact with an inner wall surface of at least one of the first step and the second step.
  • the protrusion of the top cover can cooperate with the recess of the seal to limit the displacement of the seal and prevent the seal from moving at will during use, thereby Ensure the tightness of the battery cell and increase the service life of the battery cell.
  • the inventor also provides a battery cell, including:
  • An electrode assembly housed in the case;
  • the top cover assembly covers the opening to close the electrode assembly in the case.
  • the battery cell further includes an adapter piece, and the adapter piece connects the electrode assembly and the electrode terminal.
  • the adapter piece includes a convex hull, the convex hull is at least partially located in an electrode lead-out hole, and the convex hull is connected to the electrode terminal.
  • a sealing member is provided between the electrode terminal and the top cover plate to seal the electrode lead-out hole, and one of the sealing member and the top cover plate is provided with a convex portion.
  • the other is provided with a recess for accommodating the projection, and the projection and the recess cooperate with each other to limit the displacement of the seal.
  • the convex part and the concave part cooperate with each other to prevent the sealing member from moving at will during use, thereby ensuring the tightness of the battery cell and improving the service life of the battery cell.
  • FIG. 1 is a structural exploded view of a battery cell according to a specific embodiment
  • FIG. 2 is a schematic structural diagram of a top cover assembly according to a specific embodiment
  • FIG. 3 is a structural exploded view of the top cover assembly according to the specific embodiment
  • FIG. 4 is a cross-sectional view of a top cover assembly according to a specific embodiment
  • FIG. 5 is a cross-sectional view of a positive electrode terminal according to a specific embodiment
  • FIG. 6 is a sectional view of a top cover plate according to a specific embodiment
  • FIG. 7 is a partially enlarged view at A in FIG. 5; FIG.
  • FIG. 8 is a cross-sectional view of a seal according to a specific embodiment.
  • FIG. 9 to FIG. 12 are different schematic diagrams of the top cover plate during the manufacturing process according to an embodiment.
  • first and second are used for descriptive purposes only and are not to be construed to indicate or imply relative importance unless otherwise specified or limited;
  • the term “multiple” means two or more;
  • the terms “connected” and “fixed” should be understood in a broad sense.
  • “connected” may be a fixed connection, a detachable connection, or an integrated body. Ground or electrical connection; either directly or indirectly through an intermediate medium.
  • this embodiment relates to a battery cell, which includes a top cover assembly 1, an electrode assembly 3, and a case 2.
  • the case 2 is a square case 2.
  • the top of the case 2 has an opening, and the electrode assembly 3 receives
  • the electrode assembly 3 includes a battery cell 32 and an adapter plate 31 provided on the battery cell 32.
  • the adapter plate 31 is electrically connected to the positive and negative electrodes of the battery cell 32, and a adapter plate is provided on the adapter plate 31.
  • the convex tab 311 and the adapter tab 311 cooperate with the terminal assembly 15 on the top cover assembly 1.
  • An insulating sheet 21 is provided between the casing 2 and the battery core 32 to insulate the casing 2 and the battery core 32.
  • the top cover assembly 1 covers the opening of the casing 2 to close the electrode assembly 3 in the casing 2 to form a closed space.
  • the top cover assembly 1 is provided with a terminal assembly 15 and an explosion-proof valve assembly 16.
  • the explosion-proof valve assembly 16 is explosion-proof.
  • the valve 162 may be damaged, so that the gas formed inside the battery cell may be discharged to the outside through the through hole 141 of the explosion-proof valve assembly 16, thereby preventing the battery cell from exploding.
  • An explosion-proof valve protection patch 161 is provided on the explosion-proof valve 162.
  • the top cover assembly 1 includes a top cover 11, a lower insulation member 14, a terminal assembly 15, and an explosion-proof valve assembly 16.
  • the terminal assembly 15 and the explosion-proof valve assembly 16 are disposed on the top cover 11 and the lower insulation member 14 is disposed below the top cover plate 11.
  • the top cover plate 11 has an electrode lead-out hole 111, and the electrode terminal is fixed on the top cover plate 11 by a fixing member.
  • the fixing member includes an upper insulating member 17 and a welding piece 18, and the upper insulating member 17, the welding piece 18, The electrode terminals are set from top to bottom. In the production process, the upper insulating member 17, the welding sheet 18, and the electrode terminal are integrally injection-molded.
  • the welding sheet 18 and the electrode terminal are separated by the upper insulating member 17 to prevent the welding sheet 18 and the electrode terminal from being locally short-circuited.
  • the welding piece 18 is welded to the top cover plate 11 to form a sealed structure.
  • the electrode terminal is located on one side of the top cover plate 11 and covers the electrode lead-out hole 111.
  • a seal 12 is provided between the electrode terminal and the top cover plate 11 to seal the electrode lead-out hole 111.
  • one of the sealing member 12 and the top cover plate 11 is provided with a convex portion, and the other is provided with a concave portion accommodating the convex portion.
  • the convex portion and the concave portion cooperate with each other to limit the displacement of the seal 12.
  • a groove 121 is provided at the bottom of the sealing member 12, a protrusion 112 is provided on the top cover plate 11, and the groove 121 is matched with the protrusion 112.
  • the seal 12 is made of a material having elasticity. In this embodiment.
  • the sealing member 12 is a sealing ring and is made of elastic rubber or plastic.
  • a groove 121 is provided on the bottom of the seal 12 and a protrusion 112 is provided on the top cover plate 11 to make the seal 12 and the top cover 11 easy to process, which more meets the requirements of production. 112 cooperates to fix the sealing member 12 between the electrode terminal and the top cover plate 11 to prevent the sealing member 12 from moving at will.
  • the grooves 121 at the bottom of the seal 12 may be single-point, circular, or multiple.
  • the corresponding protrusions 112 on the top cover plate 11 may also be provided in corresponding shapes.
  • the corresponding positions of the grooves 121 on the sealing member 12 can ensure the sealing effect of the battery case 2 while limiting the position of the sealing member 12 without limiting the shapes and positions of the grooves 121 and the protrusions 112.
  • the groove 121 is an annular groove 121
  • the protrusion 112 is an annular protrusion 112.
  • the protrusion 112 can exert a uniform force on the groove 121 and can avoid damage to the seal 12 to a certain extent.
  • the cover plate 11 is actually produced to facilitate mold opening.
  • the specific shape of the sealing member 12 is not limited in this embodiment. In other embodiments, the shape of the sealing member 12 may be configured as a rectangle or other shapes. Of course, the top cover plate 11 at this time The protrusions 112 need to be provided in accordance with the shape of the seal 12. In addition, in some embodiments, the fixing member and the sealing member 12 can also be provided as an integrated structure. Of course, the material of the fixing member at this time needs to have both a sealing function and a certain hardness.
  • the distance from the groove 121 to the outer wall surface of the seal 12 is greater than the distance from the groove 121 to the inner wall surface of the seal 12, that is, the groove 121 is located on the seal 12 closer to the inside of the seal 12 position.
  • the sealing member 12 is restricted on the top cover plate 11 through the cooperation of the groove 121 and the protrusion 112.
  • the electrode terminal 151 presses the sealing member 12 downward so that the sealing member 12 satisfies a compression amount of 30% ⁇ 15%.
  • the bottom of the upper insulating member 17 has a first step 131.
  • the positive electrode terminal 151 presses the sealing member 12 downward.
  • the sealing member 12 can be squeezed into the first step 131 under the action of force.
  • the groove 121 is located on the seal 12 closer to the center of the seal 12, so that the seal 12 expands outward, prevents welding slag from falling in, and prevents the negative electrode terminal 152 from contacting and short-circuiting the top cover plate 11.
  • the outer wall surface 122 of the sealing member 12 is in close contact with the inner wall surface of the upper insulating member 17. Therefore, the sealing member 12 can be subjected to a uniform pressing force, so that the sealing member 12 can fill the space between the electrode terminal and the top cover plate 11, and thus the sealing effect of the sealing member 12 can be further improved.
  • the bottom inner wall surface of the upper insulator 17 has a first step 131 and a second step 132 from top to bottom, and the outer wall surface of the seal 12 is in close contact with the inner wall surface of the first step 131, at least Part of the seal 12 is located on the second step 132.
  • the upper insulating member 17 is made of insulating material, which has the effect of insulation.
  • a first step 131 is provided on the inner wall surface of the bottom of the upper insulating member 17 to ensure that the sealing member 12 can be squeezed under the action of force. Inside the first step 131, the welding slag is prevented from entering, and the negative electrode terminal 152 and the top cover plate 11 are prevented from contacting and short-circuiting.
  • having a step on the inner wall surface of the bottom of the upper insulating member 17 can also ensure that the sealing member 12 can be squeezed into the step under the action of force to seal and prevent metal chips ⁇ ⁇ ⁇ The role of access.
  • the top cover assembly 1 further includes a lower insulation member 14 having a through hole 141 opposite to the electrode lead-out hole 111.
  • a protrusion 142 is provided on a periphery of the through hole 141, and the protrusion 142 receives In the electrode lead-out hole 111.
  • the lower insulating member 14 is generally made of a plastic material and is generally plate-shaped. The lower insulating member 14 is attached to a surface of the top cover plate 11 facing the inside of the housing 2 so that the top cover plate 11 and the The electrode assembly 3 inside the body 2 remains insulated.
  • the lower insulating member 14 includes two through holes 141 and a protruding portion 142 provided around the through holes 141, and the two through holes 141 are respectively opposite to two electrode lead-out holes 111 provided on the top cover plate 11,
  • the raised portions 142 are respectively disposed around the periphery of the through hole 141.
  • the protruding portion 142 and the lower insulating member 14 are an integrated structure, and the size of the protruding portion 142 is set in accordance with the electrode extraction hole 111 so that the projection 142 can pass through the electrode extraction hole 111.
  • the bottom insulation member 14 is connected to the top cover plate 11 in an interference fit manner.
  • the top of the convex portion 142 is in close contact with the bottom of the inner wall surface 123 of the seal 12. Further, the top of the convex portion 142 is in close contact with the bottom of the portion of the seal 12 located in the electrode lead-out hole 111. Similarly, the seal 12 can fill the space between the electrode terminal and the top cover 11, so the sealing effect of the seal 12 can be further improved.
  • the electrode terminals include a positive electrode terminal 151 and a negative electrode terminal 152.
  • the seal 12 between the positive electrode terminal 151 and the top cover plate 11 is a conductive seal 12, and the conductive seal 12 and the positive electrode respectively The electrode terminal 151 and the top cover plate 11 are electrically connected.
  • the material of the conductive seal 12 may be a conductive rubber having a predetermined resistance value.
  • the seal 12 may be made of one or more of the following materials: conductive Viton, conductive ethylene-propylene-diene rubber, and conductive nitrile rubber.
  • the manufacturing method is to add a conductive material to the masterbatch of fluoro rubber, EPDM rubber and nitrile rubber.
  • the conductive material may include, for example, conductive carbon fiber, conductive carbon powder, conductive ceramic, or metal powder.
  • the sealing member 12 By setting the sealing member 12 to have a predetermined resistance value, the electrical connection between the positive electrode terminal 151 and the top cover plate 11 can be achieved through the sealing member 12.
  • the top cover plate 11 is in laser-welded contact with the case 2. Therefore, the entire case 2 is positively charged like the positive electrode terminal 151 to prevent the case 2 from being corroded by the electrolyte.
  • the seal 12 between the positive electrode terminal 151 and the top cover plate 11 is a conductive seal 12
  • the seal 12 between the negative electrode terminal 152 and the top cover plate 11 is an insulating seal 12.
  • the positive electrode terminal 151 is connected to the top cover plate 11 and the negative electrode terminal 152 is insulated from the top cover plate 11 to prevent the positive and negative electrodes from being connected and short-circuited, respectively, to make the case 2 charged to prevent electrical corrosion and the negative electrode to prevent short circuit. effect.
  • the anode of the battery cell 32 inside the battery cell is assembled under the positive electrode terminal 151 through the convex tab 311 of the adapter, contacts the bottom surface of the positive electrode terminal 151, and is conducted through the conductive seal 12 to be connected to the top cover plate 11.
  • the cathode of the battery cell 32 inside the battery cell is assembled below the negative electrode terminal 152 through the convex tab 311 of the adapter sheet, contacts the bottom surface of the negative electrode terminal 152, and is insulated by contacting the insulating sealing member 12.
  • the compression amount is designed to meet 30% ⁇ 15%, which has a good sealing effect.
  • the top cover plate 11 is provided with two electrode lead-out holes 111, and the top cover plate 11 is provided with a protrusion 112 that cooperates with the sealing member 12.
  • the seal 12 includes an outer wall surface 122 and an inner wall surface 123.
  • the seal 12 is provided with a groove 121 for receiving the protrusion 112, and the groove 121 cooperates with the protrusion 112 to limit the displacement of the seal 12. .
  • the electrode assembly 3 is set in the casing 2, and the top cover assembly 1 covers the opening of the casing 2 to close the electrode assembly 3 in the casing 2 to form a closed space.
  • the upper insulating member 17, the welding sheet 18, and the electrode terminals are integrally injection-molded.
  • the electrode terminals are located on one side of the top cover 11 and cover the electrode lead-out holes 111.
  • a sealing member 12 is provided therebetween to seal the electrode lead-out hole 111.
  • the welding piece 18 is welded to the top cover plate 11 to form a sealed structure.
  • the convex portion and the concave portion cooperate with each other to prevent the sealing member 12 from moving at will during use, thereby ensuring the tightness of the battery cell and improving the service life of the battery cell.
  • a method for manufacturing a top cover plate includes:
  • An electrode lead-out hole 111 is formed in the metal plate and penetrates in the thickness direction;
  • a first groove 115 and a protrusion 112 are opened in a part of the metal plate surrounding the electrode lead-out hole 111.
  • the first groove 115 is recessed toward the second surface 114 with respect to the first surface 113, and the protrusion 112 is opposite to the first A bottom surface of a groove 115 protrudes and surrounds the outside of the electrode lead-out hole 111.
  • a material of the metal plate may be aluminum or an aluminum alloy.
  • a drill press can be used to draw the electrode 111 out of the metal plate.
  • the first groove 115 and the protrusion 112 may be made using a machine tool, such as a milling machine.
  • a portion of the metal plate located on the first surface 113 and surrounding the electrode extraction hole 111 is punched to form a first groove 115.
  • the metal plate may be first placed on the supporting member 4a, and then the punch 4b is away from the supporting plate 4a of the metal plate.
  • the metal sheet is punched on one side.
  • the supporting member 4a is in contact with the second surface 114 from one side
  • the punch 4b is in contact with the part of the first surface 113 surrounding the electrode lead-out hole 111 from the other side
  • the punch 4b moves downward and presses the metal A plate, and further forming a first groove 115 on the metal plate.
  • a portion of the metal plate located on the second surface 114 and surrounding the electrode extraction hole 111 is punched, thereby forming a second groove recessed toward the first surface 114 with respect to the second surface 114. 116 and convex 112.
  • the metal plate is first placed on the support member 5b, and then the punch 5a is punched from the side of the metal plate remote from the support member 4a. Mentioned metal sheet.
  • the support member 5b is in contact with the bottom surface of the first groove 115 from one side
  • the punch 5a is in contact with the part of the second surface 114 surrounding the electrode lead-out hole 111 from the other side
  • the punch 5a is moved downward and pressed
  • the metal plate further forms a second groove 116 and a protrusion 112 protruding from the bottom surface of the first groove 115 on the metal plate.
  • a third groove is reserved on the supporting member 5b for deforming the metal plate.
  • the metal plate is filled into the third groove of the support member 5b and a protrusion 112 is formed.
  • the top cover plate 11 manufactured by the foregoing manufacturing method has protrusions 112.
  • the protrusions 112 can be concave-convexly mated with the sealing member 12 to limit the displacement of the sealing member 12 and prevent the sealing member 12 from moving at will during use, thereby ensuring the battery.
  • the hermeticity of the cell improves the life of the cell.
  • the method for manufacturing the top cover assembly includes:
  • the protrusion 112 of the top cover plate can cooperate with the concave portion of the sealing member 12 to limit the displacement of the sealing member 12 and prevent the sealing member 12 from moving at will during use, thereby ensuring the integrity of the battery cell.
  • Hermeticity improves the service life of battery cells.
  • the seal 12 may be injection molded from rubber or plastic.
  • the fixing member provided includes an upper insulating member 17 and a soldering tab 18.
  • the bottom of the upper insulating member 17 has a first step 131 and a second step 132 from top to bottom, and the upper insulating member 17 and the soldering tab. 18.
  • the electrode terminal is formed by integral injection molding. When the electrode terminal compresses the seal 12, an outer wall surface of the seal 12 is in contact with at least one of the first wall 131 and the second wall 132.

Abstract

一种电池单体的顶盖组件（1），包括：顶盖板（11），顶盖板（11）具有电极引出孔（111），电极端子（151，152），电极端子（151，152）通过固定件固定在顶盖板（11）上，电极端子（151，152）位于顶盖板（11）的一侧且覆盖电极引出孔（111），电极端子（151，152）与顶盖板（11）之间设置有密封件（12），以密封电极引出孔（111）；密封件（12）与顶盖板（11）其中一者设置有凸部，另一者设置有容纳凸部的凹部，凸部和凹部彼此配合，以限制密封件（12）的位移。通过密封件（12）与顶盖板（11）的凸部与凹部彼此配合，防止密封件（12）在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。

Description

顶盖组件及其制造方法、顶盖板的制造方法和电池单体 技术领域
本发明涉及储能器件技术领域，特别涉及一种顶盖组件及其制造方法、顶盖板的制造方法和电池单体。
背景技术
目前，电池单体普遍采用的是方形硬壳结构，电池单体外包括壳体和顶盖组件，电池单体外壳提供一个密闭的空间容纳电极组件及电解液，电极组件的电能通过顶盖组件的电极端子从密闭空间内引出到密闭空间外。
现有的顶盖组件中，顶盖板为金属板并且开设电极引出孔，为了密封电极引出孔，将密封件设置在顶盖板与电极端子之间。但是，在实际使用过程中，密封件本身没有限位结构，容易发生移动，进而导致密封失效，影响电池单体的使用。
发明内容
为此，需要提供一种电池单体的顶盖组件，用于解决现有技术的技术问题。
为实现上述目的，发明人提供了一种电池单体的顶盖组件，包括：
顶盖板，
所述顶盖板具有电极引出孔，
电极端子，
所述电极端子通过固定件固定在所述顶盖板上，所述电极端子位于所述顶盖板的一侧且覆盖所述电极引出孔，所述电极端子与所述顶盖板之间设置有密封件，以密封所述电极引出孔；
所述密封件与所述顶盖板其中一者设置有凸部，另一者设置有容纳所述 凸部的凹部，所述凸部和所述凹部彼此配合，以限制所述密封件的位移。
作为本发明的一种优选结构，所述密封件的底部设置有凹槽，所述顶盖板上设置有凸起，所述凹槽与所述凸起相配合。
作为本发明的一种优选结构，所述凹槽为环形凹槽，所述凸起为环形凸起，所述凹槽到所述密封件外壁面的距离大于所述凹槽到所述密封件内壁面的距离。
作为本发明的一种优选结构，所述固定件包括上部绝缘件以及焊接片，所述上部绝缘件、所述焊接片、所述电极端子通过一体注塑成型。
作为本发明的一种优选结构，所述密封件的外壁面与所述上部绝缘件的内壁面紧密接触。
作为本发明的一种优选结构，所述上部绝缘件的底部由上至下具有第一台阶以及第二台阶，所述密封件的外壁面与所述第一台阶的内壁面紧密接触，至少部分的所述密封件位于所述第二台阶。
作为本发明的一种优选结构，所述顶盖组件还包括下部绝缘件，所述下部绝缘件具有与所述电极引出孔相对的通孔，所述通孔的周缘设置有凸起部，所述凸起部容纳于所述电极引出孔内。
作为本发明的一种优选结构，所述凸起部的顶部与所述密封件内壁面的底部紧密接触。
作为本发明的一种优选结构，所述凸起部的顶部与所述密封件位于所述电极引出孔内的部分的底部紧密接触。
作为本发明的一种优选结构，所述电极端子包括正极电极端子以及负极电极端子，所述正极电极端子与所述顶盖板之间的密封件为导电密封件，所述导电密封件分别与所述正极电极端子、所述顶盖板电连接，所述负极电极端子与所述顶盖板之间的密封件为绝缘密封件。
作为本发明的一种优选结构，所述密封件的压缩量为30％±15％。
区别于现有技术，上述技术方案通过电极端子与所述顶盖板之间设置有 密封件，以密封所述电极引出孔；所述密封件与所述顶盖板其中一者设置有凸部，另一者设置有容纳所述凸部的凹部，所述凸部和所述凹部彼此配合，以限制所述密封件的位移。通过凸部与凹部彼此配合，防止密封件在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。
为实现上述目的，发明人还提供了一种顶盖板的制造方法，其包括：
提供金属板材，所述金属板材包括沿厚度方向设置的第一表面和第二表面；
在所述金属板材上开设沿所述厚度方向贯通的电极引出孔；
在所述金属板材的围绕所述电极引出孔的部分开设第一凹槽和凸起，所述第一凹槽相对于所述第一表面朝所述第二表面凹陷，所述凸起相对于所述第一凹槽的底面突出且环绕在所述电极引出孔的外侧。
作为本发明的一种优选方法，冲压所述金属板材位于所述第一表面且围绕所述电极引出孔的部分，从而形成所述第一凹槽。冲压所述金属板材位于所述第二表面且围绕电极引出孔的部分，从而形成相对于所述第二表面朝所述第一表面凹陷的第二凹槽和所述凸起。
区别于现有技术，上述制造方法制造出的顶盖板具有凸起，凸起能够与密封件凹凸配合，以限制密封件的位移，防止密封件在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。
为实现上述目的，发明人还提供了一种顶盖组件的制造方法，其包括：
提供根据前述的顶盖板的制造方法制造出的顶盖板；
提供具有凹部的密封件，并将所述密封件放置到所述顶盖板上，且使所述顶盖板的所述凸起和所述凹部彼此配合；
提供电极端子和连接于电极端子的固定件，将所述电极端子放置到所述密封件的远离所述顶盖板的一侧、覆盖所述电极引出孔并压缩所述密封件， 然后将所述固定件固定于所述顶盖板。
作为本发明的一种优选方法，提供的所述固定件包括上部绝缘件以及焊接片，所述上部绝缘件的底部由上至下具有第一台阶以及第二台阶，所述上部绝缘件、所述焊接片、所述电极端子通过一体注塑成型。所述电极端子压缩所述密封件时，所述密封件的外壁面至少与第一台阶、第二台阶中一个的内壁面接触。
区别于现有技术，在上述制造方法制造出的顶盖组件中，顶盖板的凸起可以与密封件的凹部配合，以限制密封件的位移，防止密封件在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。
为实现上述目的，发明人还提供了一种电池单体，包括：
壳体，具有开口，
电极组件，容纳在所述壳体中；以及
如上述发明人提供的任意一项所述的顶盖组件，所述顶盖组件覆盖所述开口，以将所述电极组件封闭在所述壳体中。
作为本发明的一种优选结构，所述电池单体还包括转接片，所述转接片连接所述电极组件和所述电极端子。所述转接片包括凸包，所述凸包至少部分位于电极引出孔内，且所述凸包连接于所述电极端子。
区别于现有技术，上述技术方案通过电极端子与所述顶盖板之间设置有密封件，以密封所述电极引出孔；所述密封件与所述顶盖板其中一者设置有凸部，另一者设置有容纳所述凸部的凹部，所述凸部和所述凹部彼此配合，以限制所述密封件的位移。通过凸部与凹部彼此配合，防止密封件在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。
附图说明
图1为具体实施方式所述电池单体的结构爆炸图；
图2为具体实施方式所述顶盖组件的结构示意图；
图3为具体实施方式所述顶盖组件的结构爆炸图；
图4为具体实施方式所述顶盖组件的剖视图；
图5为具体实施方式所述正极电极端子的剖视图；
图6为具体实施方式所述顶盖板的剖视图；
图7为图5中A处的局部放大图；
图8为具体实施方式所述密封件的剖视图。
图9至图12分别为一实施例的顶盖板在制造过程中的不同示意图。
附图标记说明：
1、顶盖组件，
11、顶盖板，
111、电极引出孔，
112、凸起，
12、密封件，
121、凹槽，
122、外壁面，
123、内壁面，
131、第一台阶，
132、第二台阶，
14、下部绝缘件，
141、通孔，
142、凸起部，
15、端子组件，
151、正极电极端子，
152、负极电极端子，
16、防爆阀组件，
161、防爆阀保护贴片，
162、防爆阀，
17、上部绝缘件，
18、焊接片，
2、壳体，
21、绝缘片，
3、电极组件，
31、转接片，
311、转接片凸包，
32、电芯。
具体实施方式
为详细说明技术方案的技术内容、构造特征、所实现目的及效果，以下结合具体实施例并配合附图详予说明。
在本申请的描述中，除非另有明确的规定和限定，术语“第一”、“第二”、仅用于描述的目的，而不能理解为指示或暗示相对重要性；除非另有规定或说明，术语“多个”是指两个或两个以上；术语“连接”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接，或电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
本说明书的描述中，需要理解的是，本申请实施例所描述的“上”、“下”、“左”、“右”等方位词是以附图所示的角度来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。
请参阅图1，本实施例涉及一种电池单体，包括顶盖组件1、电极组件3以及壳体2，壳体2为方形壳体2，壳体2的顶部具有开口，电极组件3容纳在壳体2中，电极组件3包括电芯32以及设置在电芯32上的转接片31，转接片31与电芯32的正负极电连接，转接片31上设置有转接片凸包311，转接片凸包311与顶盖组件1上的端子组件15相配合。壳体2与电芯32之间设置有绝缘片21，用于对壳体2与电芯32之间进行绝缘。顶盖组件1覆盖在壳体2的开口上，以将电极组件3封闭在壳体2中，形成密闭空间。顶盖组件1上设有端子组件15以及防爆阀组件16，当电池单体由于过度充电、过度放电或电池过热而产生气体使电池单体的内部压力过大时，防爆阀组件16中的防爆阀162可以被破坏，使得形成在电池单体内部的气体可以通过防爆阀组件16的通孔141排放到外部，由此能够防止电池单体爆炸。防爆阀162上设有防爆阀保护贴片161。
参见图2以及图3，顶盖组件1包括顶盖板11、下部绝缘件14、端子组件15以及防爆阀组件16，端子组件15与防爆阀组件16设置在顶盖板11上，下部绝缘件14设置在顶盖板11下方。顶盖板11具有电极引出孔111，电极端子通过固定件固定在顶盖板11上，在本实施例中，固定件包括上部绝缘件17以及焊接片18，上部绝缘件17、焊接片18、电极端子由上至下设置。在生产过程中，上部绝缘件17、焊接片18、电极端子通过一体注塑成型，一体注塑时，焊接片18与电极端子通过上部绝缘件17隔开，防止焊接片18与电极端子局部短路。通过焊接片18与顶盖板11进行焊接，形成密封结构。电极端子位于顶盖板11的一侧且覆盖电极引出孔111，电极端子与顶盖板11之间设置有密封件12，以密封电极引出孔111。
在可选的实施例中，密封件12与顶盖板11其中一者设置有凸部，另一者设置有容纳凸部的凹部，凸部和凹部彼此配合，以限制密封件12的位移。
如图4、图5所示，优选的，在本实施例中，密封件12的底部设置有凹槽121，顶盖板11上设置有凸起112，凹槽121与凸起112相配合。但并不 限制于密封件12的底部设置有凹槽121，顶盖板11上设置有凸起112的实施方式。密封件12由具有弹性的材料制成。在本实施例中。密封件12为密封圈，由具有弹性的橡胶或塑料制成。此时，在密封件12的底部设置有凹槽121，顶盖板11上设置有凸起112，使密封件12与顶盖板11容易加工，更符合生产的要求，凹槽121与凸起112相配合，将密封件12固定在电极端子与顶盖板11之间，防止密封件12随意移动。
在一个实施例中，密封件12底部的凹槽121可以为单点的、圆形的、多个的，对应的顶盖板11上的凸起112也可以设置成相应的形状，设置在与密封件12上凹槽121相对应的位置，能够在保证电池壳体2的密封效果的同时，实现对密封件12的限位，并不限制凹槽121、凸起112的形状与位置。
优选的，在本实施例中，凹槽121为环形凹槽121，凸起112为环形凸起112。如此设置，可以使凸起112对凹槽121施加均匀的作用力，可一定程度地避免损伤密封件12；再者，有利于密封件12与顶盖板11的加工，方便密封件12与顶盖板11实际生产，便于开模。
值得说明的是，本实施例对于密封件12的具体形状并不进行限制，在其他的实施例中，密封件12的形状还可以被构造为矩形或者其它形状，当然，此时顶盖板11上的凸起112需要与密封件12的形状相适应地设置。另外，在一些实施例中，还可以将固定件和密封件12设置为一体式的结构，当然此时固定件的材料需要既具备密封功能又要具有一定硬度。
优选的，在本实施例中，凹槽121到密封件12外壁面的距离大于凹槽121到密封件12内壁面的距离，即是凹槽121位于密封件12上更靠近密封件12内部的位置。如图5所示，在密封件12实际装配的过程中，由于密封件12由具有弹性的材料制成，密封件12通过凹槽121与凸起112的配合限制在顶盖板11上，正极电极端子151将密封件12向下压，使密封件12满足30％±15％的压缩量。在上部绝缘件17的底部具有第一台阶131，正极电极端子151将密封件12向下压，密封件12在力的作用下，能够被挤压进第一台阶131 内。凹槽121位于密封件12上更靠近密封件12中心的位置，使密封件12向外扩展，防止焊渣落入，防止负极电极端子152与顶盖板11接触短路。
优选的，在本实施例中，密封件12的外壁面122与上部绝缘件17的内壁面紧密接触。因此密封件12能够受到均衡的挤压力，使密封件12能够填满电极端子与顶盖板11之间的空间，因此能够进一步提升密封件12的密封效果。
优选的，在本实施例中，上部绝缘件17的底部内壁面由上至下具有第一台阶131以及第二台阶132，密封件12的外壁面与第一台阶131的内壁面紧密接触，至少部分的密封件12位于第二台阶132。上部绝缘件17采用绝缘材质，起到绝缘的效果，为防止密封失效，在上部绝缘件17的底部内壁面设置有第一台阶131，保证密封件12在力的作用下，能够被挤压进第一台阶131内，防止焊渣落入，防止负极电极端子152与顶盖板11接触短路。
值得说明的是，在其他实施例中，上部绝缘件17的底部内壁面具有一个台阶也可以保证密封件12在力的作用下，能够被挤压进台阶内，起到密封及防金属屑搭接的作用。
请继续参见图3，顶盖组件1还包括下部绝缘件14，下部绝缘件14具有与电极引出孔111相对的通孔141，通孔141的周缘设置有凸起部142，凸起部142容纳于电极引出孔111内。本实施例中，下部绝缘件14通常采用塑料材料制成且大体呈板状，其贴附于顶盖板11的朝向壳体2内部一侧的表面，以使顶盖板11与设置在壳体2内部的电极组件3保持绝缘。
在本实施例中，下部绝缘件14包括两个通孔141和围绕通孔141设置的凸起部142，两个通孔141分别与顶盖板11上设置的两个电极引出孔111相对，而凸起部142分别围绕设置在通孔141的周缘。示例性地，凸起部142与下部绝缘件14为一体式结构，其凸起部142的尺寸与电极引出孔111相适应地设置，以便凸起部142能够与电极引出孔111之间通过过盈配合方式将下部绝缘件14连接于顶盖板11。
优选的，如图5所示，在本实施例中，在将下部绝缘件14稳固固定于顶盖板11的同时，凸起部142的顶部与密封件12内壁面123的底部紧密接触。进一步地，凸起部142的顶部与密封件12位于电极引出孔111内的部分的底部紧密接触。同样的，使密封件12能够填满电极端子与顶盖板11之间的空间，因此能够进一步提升密封件12的密封效果。
在一个可选的实施例中，电极端子包括正极电极端子151以及负极电极端子152，正极电极端子151与顶盖板11之间的密封件12为导电密封件12，导电密封件12分别与正极电极端子151、顶盖板11电连接。
导电密封件12的材质可以为具有预定阻值的导电橡胶，通过将密封件12设置为具有预定阻值的导电橡胶，例如密封件12可以采用以下材料中的一种或者多种制成：导电氟橡胶、导电三元乙丙橡胶和导电丁腈橡胶。制作方法即在氟橡胶、三元乙丙橡胶和丁腈橡胶的母料中添加导电材料。导电材料例如可以包括：导电碳纤维、导电碳粉、导电陶瓷或者金属粉末。
通过将密封件12设置为具有预定阻值，能够通过密封件12实现正极电极端子151与顶盖板11的电连接。顶盖板11与壳体2激光焊接接触，因此，整个壳体2与正极电极端子151一样带正电，防止壳体2被电解液腐蚀。
在实施例中，正极电极端子151与顶盖板11之间的密封件12为导电密封件12，负极电极端子152与顶盖板11之间的密封件12为绝缘密封件12。实现正极电极端子151与顶盖板11相导通，负极电极端子152与顶盖板11相绝缘，防止正负极连通短路，分别起到使得壳体2带电防止电腐蚀和负极绝缘防止短路的作用。
电池单体内部电芯32的阳极通过转接片凸包311，装配到正极电极端子151下方，接触正极电极端子151的底面，并通过导电密封件12导通，连接到顶盖板11上。电池单体内部电芯32的阴极通过转接片凸包311，装配到负极电极端子152下方，接触负极电极端子152的底面，通过接触绝缘密封件12绝缘。即满足电芯32的导电性，将电流导到外部设备上使用，同时壳体2 带电防止电腐蚀，又满足电芯32的绝缘性，防止电芯32正负极短路，同时也满足电芯32的气密性。无论导电还是绝缘密封件12，压缩量设计上均满足30％±15％，起到很好的密封效果。
参见图6以及图7，本实施例中，顶盖板11上设置有两个电极引出孔111，顶盖板11上设置有与密封件12相配合的凸起112。
如图8所示，密封件12包括外壁面122与内壁面123，密封件12上设置有容纳凸起112的凹槽121，凹槽121与凸起112相配合，以限制密封件12的位移。
使用过程中，将电极组件3设置在壳体2内，顶盖组件1覆盖在壳体2的开口上，以将电极组件3封闭在壳体2中，形成密闭空间。在顶盖组件1生产过程中，上部绝缘件17、焊接片18、电极端子通过一体注塑成型，电极端子位于顶盖板11的一侧且覆盖电极引出孔111，电极端子与顶盖板11之间设置有密封件12，以密封电极引出孔111。焊接片18与顶盖板11进行焊接，形成密封结构。
区别于现有技术，本实施例通过凸部与凹部彼此配合，防止密封件12在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。
下面描述本申请的顶盖板在一些实施例中的制造方法。参照图9-12，顶盖板的制造方法包括：
提供金属板材，所述金属板材包括沿厚度方向设置的第一表面113和第二表面114；
在所述金属板材上开设沿所述厚度方向贯通的电极引出孔111；
在所述金属板材的围绕电极引出孔111的部分开设第一凹槽115和凸起112，第一凹槽115相对于第一表面113朝所述第二表面114凹陷，凸起112相对于第一凹槽115的底面突出且环绕在电极引出孔111的外侧。
具体地，在一些实施例中，所述金属板材的材质可为铝或铝合金。
在一些实施例中，可使用钻床在所述金属板材上电极引出孔111。
在一些实施例中，第一凹槽115和凸起112可使用机床(例如铣床)制成。
在一些实施例中，冲压所述金属板材位于第一表面113且围绕电极引出孔111的部分，从而形成第一凹槽115。具体地，在冲压第一凹槽115的工序中，参照图9和图10，可先将所述金属板材放置到支撑构件4a上，然后冲头4b从所述金属板材的远离支撑构件4a的一侧冲压所述金属板材。具体地，支撑构件4a从一侧与第二表面114接触，冲头4b从另一侧与第一表面113的围绕电极引出孔111的部分接触，冲头4b向下运动并挤压所述金属板材，进而在所述金属板材上形成第一凹槽115。
在一些实施例中，冲压所述金属板材位于所述第二表面114且围绕电极引出孔111的部分，从而形成相对于所述第二表面114朝所述第一表面114凹陷的第二凹槽116和凸起112。具体地，在冲压第二凹槽116的工序中，参照图11，先将所述金属板材放置到支撑构件5b上，然后冲头5a从所述金属板材的远离支撑构件4a的一侧冲压所述金属板材。具体地，支撑构件5b从一侧与第一凹槽115的底面接触，冲头5a从另一侧与第二表面114的围绕电极引出孔111的部分接触，冲头5a向下运动并挤压所述金属板材，进而在所述金属板材上形成第二凹槽116和相对于所述第一凹槽115的底面突出的凸起112。其中，支撑构件5b上预留出供所述金属板材变形的第三凹槽。在冲头5a挤压所述金属板材的过程中，所述金属板材填充到支撑构件5b的第三凹槽中并形成凸起112。
通过前述的制造方法制造出的顶盖板11具有凸起112，凸起112可以与密封件12凹凸配合，以限制密封件12的位移，防止密封件12在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。
下面描述本申请的顶盖组件在一些实施例中的制造方法。具体地，所述顶盖组件的制造方法包括：
提供根据前述的顶盖板的制造方法制造出的顶盖板11；
提供具有凹部的密封件12，并将密封件12放置到顶盖板11上，且使顶盖板11的所述凸起112和所述凹部彼此配合；
提供电极端子和连接于电极端子的固定件，将所述电极端子放置到密封件12的远离顶盖板11的一侧、覆盖电极引出孔111并压缩密封件12，然后将所述固定件固定于所述顶盖板。
在制成的顶盖组件中，顶盖板的凸起112可以与密封件12的凹部配合，以限制密封件12的位移，防止密封件12在使用过程中随意移动，从而保证电池单体的密封性，提高电池单体的使用寿命。
在一些实施例中，密封件12可由橡胶或塑料注塑成型。
在一些实施例中，提供的所述固定件包括上部绝缘件17以及焊接片18，上部绝缘件17的底部由上至下具有第一台阶131以及第二台阶132，上部绝缘件17、焊接片18、所述电极端子通过一体注塑成型。所述电极端子压缩密封件12时，密封件12的外壁面至少与第一台阶131、第二台阶132中一个的内壁面接触。
需要说明的是，尽管在本文中已经对上述各实施例进行了描述，但并非因此限制本发明的专利保护范围。因此，基于本发明的创新理念，对本文所述实施例进行的变更和修改，或利用本发明说明书及附图内容所作的等效结构或等效流程变换，直接或间接地将以上技术方案运用在其他相关的技术领域，均包括在本发明专利的保护范围之内。

Claims (17)

  1. 一种电池单体的顶盖组件，包括：
    顶盖板，
    所述顶盖板具有电极引出孔，
    电极端子，
    所述电极端子通过固定件固定在所述顶盖板上，所述电极端子位于所述顶盖板的一侧且覆盖所述电极引出孔，所述电极端子与所述顶盖板之间设置有密封件，以密封所述电极引出孔；
    所述密封件与所述顶盖板其中一者设置有凸部，另一者设置有容纳所述凸部的凹部，所述凸部和所述凹部彼此配合，以限制所述密封件的位移。
  2. 根据权利要求1所述的顶盖组件，其特征在于：所述密封件的底部设置有凹槽，所述顶盖板上设置有凸起，所述凹槽与所述凸起相配合。
  3. 根据权利要求2所述的顶盖组件，其特征在于：所述凹槽为环形凹槽，所述凸起为环形凸起，所述凹槽到所述密封件外壁面的距离大于所述凹槽到所述密封件内壁面的距离。
  4. 根据权利要求1所述的顶盖组件，其特征在于：所述固定件包括上部绝缘件以及焊接片，所述上部绝缘件、所述焊接片、所述电极端子通过一体注塑成型。
  5. 根据权利要求4所述的顶盖组件，其特征在于：所述密封件的外壁面与所述上部绝缘件的内壁面紧密接触。
  6. 根据权利要求5所述的顶盖组件，其特征在于：所述上部绝缘件的底部由上至下具有第一台阶以及第二台阶，所述密封件的外壁面与所述第一台阶的内壁面紧密接触，至少部分的所述密封件位于所述第二台阶。
  7. 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下部绝缘件，所述下部绝缘件具有与所述电极引出孔相对的通孔，所述通孔的周缘设置有凸起部，所述凸起部容纳于所述电极引出孔内。
  8. 根据权利要求7所述的顶盖组件，其特征在于：所述凸起部的顶部与 所述密封件内壁面的底部紧密接触。
  9. 根据权利要求7所述的顶盖组件，其特征在于：所述凸起部的顶部与所述密封件位于所述电极引出孔内的部分的底部紧密接触。
  10. 根据权利要求1所述的顶盖组件，其特征在于：所述电极端子包括正极电极端子以及负极电极端子，所述正极电极端子与所述顶盖板之间的密封件为导电密封件，所述导电密封件分别与所述正极电极端子、所述顶盖板电连接，所述负极电极端子与所述顶盖板之间的密封件为绝缘密封件。
  11. 根据权利要求1-10中任一项所述的顶盖组件，其特征在于：所述密封件的压缩量为30％±15％。
  12. 一种顶盖板的制造方法，其特征在于，包括：
    提供金属板材，所述金属板材包括沿厚度方向设置的第一表面和第二表面；
    在所述金属板材上开设沿所述厚度方向贯通的电极引出孔；
    在所述金属板材的围绕所述电极引出孔的部分开设第一凹槽和凸起，所述第一凹槽相对于所述第一表面朝所述第二表面凹陷，所述凸起相对于所述第一凹槽的底面突出且环绕在所述电极引出孔的外侧。
  13. 根据权利要求12所述顶盖板的制造方法，其特征在于，
    冲压所述金属板材位于所述第一表面且围绕所述电极引出孔的部分，从而形成所述第一凹槽；
    冲压所述金属板材位于所述第二表面且围绕电极引出孔的部分，从而形成相对于所述第二表面朝所述第一表面凹陷的第二凹槽和所述凸起。
  14. 一种顶盖组件的制造方法，其特征在于，包括：
    提供根据权利要求12或13所述的制造方法制造出的顶盖板；
    提供具有凹部的密封件，并将所述密封件放置到所述顶盖板上，且使所述顶盖板的所述凸起和所述凹部彼此配合；
    提供电极端子和连接于电极端子的固定件，将所述电极端子放置到所述 密封件的远离所述顶盖板的一侧、覆盖所述电极引出孔并压缩所述密封件，然后将所述固定件固定于所述顶盖板。
  15. 根据权利要求14所述顶盖组件的制造方法，其特征在于，
    提供的所述固定件包括上部绝缘件以及焊接片，所述上部绝缘件的底部由上至下具有第一台阶以及第二台阶，所述上部绝缘件、所述焊接片、所述电极端子通过一体注塑成型；
    所述电极端子压缩所述密封件时，所述密封件的外壁面至少与第一台阶、第二台阶中一个的内壁面接触。
  16. 一种电池单体，其特征在于，包括：
    壳体，具有开口，
    电极组件，容纳在所述壳体中；以及
    如权利要求1至11中任意一项所述的顶盖组件，所述顶盖组件所述开口，以将所述电极组件封闭在所述壳体中。
  17. 根据权利要求16所述的电池单体，其特征在于，
    所述电池单体还包括转接片，所述转接片连接所述电极组件和所述电极端子；
    所述转接片包括凸包，所述凸包至少部分位于电极引出孔内，且所述凸包连接于所述电极端子。
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CN112615093B (zh) * 2020-12-30 2023-08-04 武汉富航精密工业有限公司 二次电池顶盖组件的注塑装配方法及顶盖组件
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