WO2019148662A1 - Ensemble couvercle de batterie secondaire et batterie secondaire - Google Patents

Ensemble couvercle de batterie secondaire et batterie secondaire Download PDF

Info

Publication number
WO2019148662A1
WO2019148662A1 PCT/CN2018/083381 CN2018083381W WO2019148662A1 WO 2019148662 A1 WO2019148662 A1 WO 2019148662A1 CN 2018083381 W CN2018083381 W CN 2018083381W WO 2019148662 A1 WO2019148662 A1 WO 2019148662A1
Authority
WO
WIPO (PCT)
Prior art keywords
top cover
electrode
terminal
connecting portion
secondary battery
Prior art date
Application number
PCT/CN2018/083381
Other languages
English (en)
Chinese (zh)
Inventor
张捷
郭志君
王鹏
李国伟
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2019148662A1 publication Critical patent/WO2019148662A1/fr

Links

Images

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
    • H01M50/50—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
    • H01M50/10—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
    • H01M50/172—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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • 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
    • 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 field of power battery technologies, and in particular, to a top cover assembly for a secondary battery and a secondary battery.
  • the power battery generally adopts a square hard shell structure
  • the power battery casing includes a casing and a top cover assembly.
  • the power battery housing provides a sealed space for the electrode assembly and electrolyte.
  • the electrical energy of the electrode assembly is led out of the confined space through the poles of the top cover assembly to the outside of the confined space.
  • the top cover is a metal plate and has a through hole
  • the pole is divided into a base portion and an extension portion
  • the cross-sectional area of the base portion is larger than the aperture of the through hole.
  • the base portion is located below the top cover (ie, inside the housing), and the sealing ring is located between the base portion and the top cover.
  • the extension portion is fixed by a circlip or by riveting. This method fixes the pole to the top cover.
  • the pole Since it is necessary to fix the pole to the top cover, a part of the structure of the pole needs to be located inside the casing (usually 1.5 mm to 4 mm).
  • the sealing ring is also located inside the casing, so that the space utilization inside the battery casing is low, resulting in low energy density of the battery.
  • a cap assembly and a secondary battery of a secondary battery are provided, which can improve the space utilization ratio inside the secondary battery case, improve the energy density of the secondary battery, and simplify the structure of the electrode terminal.
  • One or more of the effects of improving the processing efficiency of the secondary battery are provided, which can improve the space utilization ratio inside the secondary battery case, improve the energy density of the secondary battery, and simplify the structure of the electrode terminal.
  • a top cover assembly for a secondary battery includes: a top cover, the top cover is made of an insulating plastic and has an electrode lead-out hole; the electrode terminal includes an terminal block, The terminal board is located at one side of the top cover and covers the electrode lead-out hole; and a current collecting terminal board, the current collecting terminal board includes a first connecting portion and an extending portion connected to the first connecting portion, and the first connecting portion is located at the top cover A side facing away from the terminal block is attached to the top cover, and an extension portion extends into the electrode lead-out hole to be connected to the electrode terminal.
  • a secondary battery comprising: a housing having an opening; an electrode assembly housed in the housing, the electrode assembly having a body and a tab; and the cap assembly described above Covering the opening of the housing to enclose the electrode assembly in the housing, wherein the tab extends from a side of the body adjacent the top cover and is coupled to the current collecting terminal block.
  • the top cover assembly and the secondary battery of the secondary battery of the embodiment of the present application configure the current collecting terminal block located inside the housing to include a first connecting portion and an extending portion connected to the first connecting portion.
  • the top cover is made of insulating plastic, and the first connecting portion of the collecting terminal plate is located on the side of the top cover facing the housing and is fitted to the top cover so as not to be between the top cover and the collecting terminal block. Additional insulation is added.
  • the extension portion extends into the electrode lead-out hole and is connected to the electrode terminal disposed on the top cover plate, thereby achieving the purpose of electrically connecting the electrode assembly to the electrode terminal through the current collecting terminal plate, and the electrode terminal does not need to exceed the top cover
  • the side of the panel faces the side of the housing.
  • the top cover assembly and the secondary battery of the embodiment of the present application have a structure that simplifies the electrode terminal, thereby improving the processing efficiency of the secondary battery, and further improving the space utilization ratio inside the secondary battery case, thereby improving the secondary battery.
  • FIG. 1 is a schematic exploded view of a secondary battery according to an embodiment of the present application.
  • FIG. 2 is a schematic structural view of a top cover assembly in the secondary battery of FIG. 1;
  • Figure 3 is a cross-sectional structural view of the top cover assembly of Figure 2 taken along a longitudinal direction;
  • Figure 4 is an enlarged plan view showing a partial structure of a portion A of the top cover assembly of Figure 3;
  • FIG. 5 is a schematic structural view showing another mounted state of the secondary battery of FIG. 1;
  • FIG. 6 is a schematic structural view of a top cover assembly according to another embodiment of the present application.
  • Figure 7 is an exploded perspective view of the top cover assembly of Figure 6;
  • Figure 8 is a cross-sectional structural view of the top cover assembly of Figure 6 taken along a longitudinal direction;
  • Figure 9 is an enlarged plan view showing a partial structure of a portion B of the top cover assembly of Figure 8.
  • FIG. 10 is a cross-sectional structural view of a top cover assembly according to still another embodiment of the present application.
  • FIG. 11 is a cross-sectional structural view of a top cover assembly according to still another embodiment of the present application.
  • 1-secondary battery 100-top cover assembly; 101-top cover assembly; 102-top cover assembly; 103-top cover assembly;
  • 30-current collecting terminal block 31-first connecting portion; 32-second connecting portion; 33-transition portion; 34-extension portion; 341-recess portion;
  • the secondary battery provided in the embodiment of the present application can perform charging and discharging operations cyclically to facilitate the multiple use of the secondary battery, and the secondary battery in the embodiment of the present application reduces the occupancy of the internal space of the housing.
  • the energy density of the secondary battery can be improved, and the structure of the secondary battery is simple and easy to produce, so that the production efficiency of the secondary battery can be effectively improved, and the manufacturing cost thereof can be reduced.
  • top cover assembly and a secondary battery will be described in detail below with reference to FIGS. 1 through 11.
  • FIG. 1 is a schematic exploded view of a secondary battery 1 according to an embodiment of the present application.
  • FIG. 2 is a schematic structural view of a cap assembly 100 in the secondary battery 1 of FIG. 1.
  • the secondary battery 1 generally includes a top cover assembly 100, a housing (not shown), and an electrode assembly 200 located inside the housing.
  • the housing may be made of a plastic material such as PE or PP.
  • the casing is formed in a rectangular box shape and has an opening to communicate the accommodation space inside thereof through the opening.
  • the electrode assembly 200 may be formed by stacking or winding a first pole piece, a second pole piece, and a separator together, wherein the separator is an insulator interposed between the first pole piece and the second pole piece.
  • the first pole piece is exemplified as a positive electrode piece
  • the second pole piece is a negative electrode piece.
  • the first pole piece may also be a negative electrode sheet
  • the second pole piece is a positive electrode sheet.
  • the positive electrode active material is coated on the coated portion of the positive electrode sheet, and the negative electrode active material is applied onto the coated portion of the negative electrode sheet.
  • the uncoated region extending from the coated region of the body acts as a tab
  • the electrode assembly 200 includes two tabs (only the tab 210 is shown in Figures 1 and 2), one of the two tabs It extends from the coated area of the positive electrode sheet; the other extends from the coated area of the negative electrode sheet.
  • the top cover assembly 100 is for sealing the housing, and the opening of the top cover assembly 100 to the housing can seal the electrode assembly 200 within the housing.
  • the electrode assembly 200 of the secondary battery 1 in the embodiment of the present application draws the positive electrode and the negative electrode to the outside of the secondary battery 1 from opposite directions, respectively.
  • the secondary battery 1 includes two top cover assemblies 100, and the two top cover assemblies 100 are respectively located on the upper and lower sides of the secondary battery 1.
  • One of the terminal assembly and the negative terminal assembly for extracting the electric energy of the electrode assembly 200 to the positive electrode outside the secondary battery 1 is mounted on the top cover assembly 100 on the top of the secondary battery 1, and the positive terminal assembly and The other of the terminal assemblies of the negative electrode is mounted on the top cover assembly 100 at the bottom of the secondary battery 1.
  • the structure of the top cover assembly 100 will be described below by taking only the top cover assembly 100 located on the upper side of the secondary battery 1 as an example.
  • the structure of the cap assembly located on the upper and lower sides of the secondary battery may also be configured differently in accordance with the prior art.
  • FIG. 3 is a cross-sectional structural view of the top cover assembly 100 of FIG. 2 taken along a longitudinal direction; and FIG. 4 is an enlarged partial view showing a portion A of the top cover assembly 100 of FIG.
  • the top cover assembly 100 generally includes a top cover 10, a first terminal assembly 20, and a current collecting terminal block 30.
  • the top cover 10 is in the form of a thin plate and has a size and shape that matches the opening of the housing so as to be connectable to the opening of the housing.
  • the top cover 10 is made of insulating plastic, and the top cover 10 can be made of a high temperature resistant insulating plastic material, for example, one of polyphenylene sulfide PPS, perfluoroalkoxy resin PEA or polypropylene PP or Made in a variety of ways.
  • a high temperature resistant insulating plastic material for example, one of polyphenylene sulfide PPS, perfluoroalkoxy resin PEA or polypropylene PP or Made in a variety of ways.
  • the first terminal assembly 20 includes an electrode terminal 21 and a seal 22.
  • the top cover 10 is provided with an electrode take-out hole 11.
  • the electrode terminal 21 includes a terminal plate which is a square thin plate-like structure, and the terminal plate is fixed on the side of the top cover 10 facing away from the electrode assembly 200, that is, from the top to the bottom when the first terminal assembly 20 is assembled. Way assembly.
  • the surface of the electrode terminal 21 near the top cover 10 does not exceed the surface of the top cover 10 close to the electrode terminal 21 (ie, the electrode terminal 21 only includes the terminal plate and does not protrude into the electrode lead-out hole. 11)).
  • the electrode terminal 21 covers the electrode lead-out hole 11 and the outer peripheral surface of the electrode terminal 21 protrudes from the inner wall of the electrode lead-out hole 11 (that is, as shown in FIGS. 3 and 4, the electrode terminal The cross-sectional dimension of 21 is larger than the cross-sectional dimension of the electrode lead-out hole 11).
  • the electrode terminal 21 can be exposed inside the casing via the electrode lead-out hole 11 to be electrically connected to the electrode assembly 200, and the surface of the electrode terminal 21 facing away from the top cover 10 can be connected to the external bus bar.
  • the electrode terminal 21 is an electrode terminal of a positive electrode (of course, the electrode terminal 21 may also be an electrode terminal of a negative electrode), which may be made of an aluminum or aluminum alloy material.
  • the current collecting terminal 30 is located between the electrode terminal 21 and the body of the electrode assembly 200.
  • the current collecting terminal 30 is preferably used with an electrode.
  • the terminal 21 and the tab 210 are made of the same metal material.
  • the current collecting terminal block 30 includes a first connecting portion 31, a second connecting portion 32, and a transition portion 33, wherein the transition portion 33 is connected between the first connecting portion 31 and the second connecting portion 32 such that the current collecting terminal block 30
  • the whole is configured as a general C type. And in order to ensure the connection stability between the electrode terminal 21 and the tab 210, the first connecting portion 31, the second connecting portion 32, and the transition portion 33 are formed in an integrally formed manner.
  • the first connecting portion 31 and the second connecting portion 32 are all in a flat plate shape, and both extend in the width direction of the top cover 10, in this embodiment, by way of example, A connecting portion 31 and a second connecting portion 32 are all parallel to the top cover 10, but the first connecting portion 31 and the second connecting portion 32 all extend along the width direction of the top cover 10, which does not mean that the two must be parallel
  • the top cover 10 may extend substantially in the width direction of the top cover 10 as long as the first connecting portion 31 and the second connecting portion 32. That is, the first connecting portion 31 and the second connecting portion 32 may be slightly inclined with respect to the top cover 10.
  • the first connection portion 31 of the current collecting terminal block 30 can be connected to the electrode terminal 21, and the second connection portion 32 can be connected to the tab 210.
  • the current collecting terminal plate 30 is first set as a substantially inverted L type (as shown in FIG. 1). Then, the first connecting portion 31 of the current collecting terminal 30 is soldered to the electrode terminal 21 for easy operation.
  • the first connecting portion 31 includes a main body and an extending portion 34 connected to the main body, wherein the main body is located on a side of the top cover 10 facing the electrode assembly 200 for electrically connecting with the tab 210; and the extending portion 34 is capable of extending into the electrode lead-out hole 11 is electrically connected to the electrode terminal 21.
  • the electrode terminal 21 can be electrically connected to the corresponding pole piece in the electrode assembly 200.
  • the body of the first connecting portion 31 is configured as a flat sheet-like body, and the body is parallel to the top cover 10.
  • the parallelism referred to herein is not strictly parallel, that is, in the specific implementation process, the parallelism of the main body and the top cover 10 is allowed to be inaccurate.
  • the top cover 10 is made of an insulating material, the first connecting portion 31 of the current collecting terminal 30 can be directly attached to the top cover 10 without being in the first connecting portion 31.
  • An insulating member is provided between the top cover 10 and the top cover 10, so that the space occupied by the top cover assembly 100 can be reduced, and the energy density of the secondary battery 1 can be improved.
  • the extending portion 34 is a convex hull disposed on a surface of the main body of the first connecting portion 31 close to the top cover 10, and is formed on the surface of the main body away from the top cover 10 by providing the convex hull.
  • the extension 34 may be a cylindrical convex hull formed on the body by stamping.
  • the integrally formed manner can enhance the structural strength of the current collecting terminal block 30 as a whole to increase the connection reliability between the electrode terminal 21 and the tab 210.
  • the main body of the first connecting portion 31 can be directly attached to the surface of the top cover 10 facing the electrode assembly 200, and the extending portion 34 can be inserted into the electrode lead-out hole 11 to be in contact with the electrode terminal 21, thereby
  • the extension portion 34 can be soldered to the electrode terminal 21, for example, by laser welding.
  • the extending portion 34 is formed by punching a convex hull on the first connecting portion 31, and the extending portion 34 can be inserted into the electrode drawing hole 11 to be electrically connected to the electrode terminal 21, so that the electrode terminal 21 does not need to face the electrode of the top cover 10.
  • One side of the assembly 200 is additionally provided with another structure electrically connected to the first connecting portion 31. Therefore, the structure of the top cover assembly 100 can be simplified, and the space occupied by the top cover assembly 100 inside the casing can be reduced, so that the energy density of the secondary battery 1 can be effectively improved.
  • the structure and the processing of the electrode terminal 21 are simple and can be formed by a simple cutting and punching method, the processing cost of the secondary battery 1 can be reduced, and the processing difficulty of the secondary battery 1 can be reduced.
  • the recess 341 on the side of the first connecting portion 31 away from the top cover 10, more electrolyte can be stored in the housing, so that the cycle life of the battery can be increased (because the battery is charged and discharged)
  • gas is generated inside the casing, and the recess 341 can also accommodate a certain volume of gas, so that the casing can be prevented from being expanded and deformed to some extent.
  • the convex hull is adapted to the shape of the electrode take-out hole 11, and the convex hull and the electrode lead-out hole 11 are both oblong or square in cross section. Therefore, when the convex hull is inserted through the electrode lead-out hole 11, the convex hull does not rotate circumferentially in the electrode lead-out hole 11 under the cooperation of the convex hull and the electrode lead-out hole 11, so that the convex set can be set.
  • the flow terminal block 30 and the electrode terminal 21 connected to the current collecting terminal block 30 are limited. After the current collecting terminal block 30 and the electrode terminal 21 are rotated relative to the top cover 10, the connection stability between the current collecting terminal block 30 and the electrode terminal 21 is affected.
  • a sinker portion is provided on a side of the top cover 10 remote from the electrode assembly 200, and the sinker portion surrounds the periphery of the electrode lead-out hole 11 and has a predetermined depth.
  • the shape of the sinker portion is adapted to the shape of the electrode terminal 21. Since the electrode terminal 21 is a square plate body, the lower sink portion is correspondingly provided as a square groove. At least a portion of the electrode terminal 21 is housed in the sinker portion, that is, the electrode terminal 21 may be partially housed in the sinker portion, and the partial structure of the electrode terminal 21 is exposed to the outside to facilitate the electrode terminal 21 to be realized and converged. A welded connection between the rows.
  • the sealing member 22 is provided between the electrode terminal 21 and the top cover 10.
  • the sealing member 22 has an annular structure as a whole, and is interposed between the top cover 10 and the electrode terminal 21, and is in contact with the electrode terminal 21 and the top cover 10, respectively. Thereby, the sealing member 22 is in close contact with the top cover 10 and the electrode terminal 21, respectively, to seal the electrode lead-out hole 11, thereby ensuring the airtightness of the secondary battery 1.
  • the top cover 10 is further provided with a receiving groove 12 around the electrode lead-out hole 11.
  • the expanded area of the receiving groove 12 is smaller than the expanded area of the sinking portion, and the receiving groove 12 is deeper than the sinking portion.
  • the depth of the portion is such that the accommodating groove 12 has a stepped structure around the electrode take-out hole 11.
  • the seal 22 can be at least partially received in the receiving groove 12 to limit the seal 22 through the receiving groove 12, preventing the seal 22 from moving between the electrode terminal 21 and the top cover 10, and also reducing the top
  • the overall thickness of the cover assembly 100 is increased, thereby increasing the energy density of the secondary battery 1.
  • the top cover 10 is further provided with a stop flange 13 around the electrode lead-out hole 11, and the stop flange 13 matches the shape of the inner ring of the sealing member 22, In order to enable the seal 22 to fit over the stop flange 13 .
  • the sealing member 22 can be further positioned by the stopper flange 13 to ensure the sealing property of the electrode extraction opening 11.
  • the melting or deformation of the influence of the welding causes the sealing of the electrode lead-out hole 11 to fail, so that the reliability of use of the secondary battery 1 can be further improved.
  • the specific shape of the sealing member 22 is not limited in the embodiment of the present application.
  • the rotating body structure of the sealing member 22 may also be configured in a rectangular shape or other shapes.
  • the receiving groove 12 on the 10 needs to be provided in accordance with the shape of the sealing member 22.
  • Fig. 5 is a schematic structural view showing another mounted state of the secondary battery 1 of Fig. 1.
  • one of the tabs 210 of the electrode assembly 200 generally includes a plurality of stacked sheets.
  • the thickness of the tab 210 relative to the top cover 10 is The bent portion 210a is formed by bending, and the bent portion 210a corresponds to a plate body extending in the width direction of the top cover 10.
  • the current collecting terminal block 30 is connected to the tab 210 in an inverted L-shape, and the tab 210 is not yet bent relative to the body of the electrode assembly 200. That is, the second connecting portion 32 and the transition portion 33 are perpendicular to the first connecting portion 31 while the tab 210 extends toward the top cover 10.
  • the tab 210 is attached to the second connecting portion 32 from the side close to the first connecting portion 31, and the second connecting portion 32 and the tab 210 which are bonded to each other are welded and connected by ultrasonic welding. Then, the current collecting terminal block 30 and the tab 210 can be bent.
  • the first connecting portion 31 and the second connecting portion 32 are parallel to each other and separated, so that the collecting terminal block 30 is configured as a substantially C.
  • the bent portion 210a formed by the bending of the tab 210 is located between the first connecting portion 31 and the second connecting portion 32, and preferably the tab 210 is bent around the edge of the second connecting portion 32.
  • the end portion of the tab 210 can be prevented from falling down in the direction of the electrode assembly 200 by gravity, and the electrode assembly can be made.
  • the contact of the positive electrode tab and the negative electrode tab in the main body of 200 causes a short circuit, so that the safety and reliability of the secondary battery 1 can be improved.
  • the transition portion 33 is provided between the first connecting portion 31 and the second connecting portion 32, there is a gap between the first connecting portion 31 and the second connecting portion 32, so the bent portion 210a is set at the first Between the connecting portion 31 and the second connecting portion 32, the space between the first connecting portion 31 and the second connecting portion 32 can be further utilized to prevent the connection structure between the electrode terminal 21 and the tab 210 from occupying the inside of the secondary battery 1 Excessive space makes it possible to increase the energy density of the secondary battery 1.
  • the electrode terminal 21 and the first connecting portion 31 can be connected by laser welding, and the second connecting portion 32 and the bending portion can be bent.
  • the portion 210a is connected by ultrasonic welding, so that the connection between the electrode terminal 21 and the tab 210 can be simplified.
  • the transition portion 33 can absorb vibration to prevent the tab 210 from tearing due to non-deformation when the secondary battery 1 vibrates.
  • the inner surface at the joint of the first joint portion 31 and the transition portion 33 is provided with a first score, and the inner surface of the joint portion of the second joint portion 32 and the transition portion 33 Set with a second score.
  • the current collecting terminal plate 30 can be more smoothly bent into a substantially C-shaped structure by the first notch and the second notch.
  • the first notch and the second notch are located on the inner surface of the bent collecting terminal block 30, the bottom of the first notch and the second notch are subjected to compressive stress when the collecting terminal plate 30 is bent. Therefore, by providing the first notch and the second notch, it is possible to prevent the bottom of the notch from being subjected to tensile stress and causing the current collecting terminal plate 30 to be broken under the premise that the current collecting terminal plate 30 is smoothly bent.
  • the structure of the second terminal assembly 40 is similar to that of the first terminal assembly 20, and the second terminal assembly 40 also includes the electrode terminal 41 and the sealing member 42, and the electrode terminal 41 and the electrode terminal 21 are identical in structure and connection, and are sealed.
  • the member 42 is identical in structure and connection to the seal 22 except that the second terminal assembly 40 is mounted on the opposite side of the first terminal assembly 20 by the cap assembly 100 located on the other side of the secondary battery 1.
  • FIG. 6 is a schematic structural view of a top cover assembly 101 according to another embodiment of the present application
  • FIG. 7 is an exploded perspective view of the top cover assembly 101 of FIG. 6
  • FIG. 8 is a longitudinal assembly of the top cover assembly 101 of FIGS. 6 and 7.
  • FIG. 9 is an enlarged schematic view showing a partial structure of a portion B of the top cover assembly 101 of FIG. 8.
  • the difference from the top cover assembly 100 in the above embodiment is that in the top cover assembly 101 of the present embodiment, the electrode terminal 21 includes the first terminal plate 211. And the second terminal block 212 to satisfy the switching between the external bus bar and the internal electrode assembly 200 by configuring the first terminal plate 211 and the second terminal plate 212 to have different base metals.
  • the electrode terminal 21 is a square thin plate-like structure including a first terminal plate 211 and a second terminal plate 212, and the first terminal plate 211 is located away from the top cover 10 of the second terminal plate 212.
  • the second terminal block 212 covers the electrode lead-out hole 11.
  • the first terminal plate 211 and the second terminal plate 212 are attached to each other, and the material of the first terminal plate 211 and the material of the second terminal plate 212 have different base metals (the main component metal constituting the alloy is called a base metal, such as iron In the carbon alloy, iron is a base metal. In an iron-nickel alloy having a nickel content of less than 50%, iron is a base metal, and in an iron-nickel alloy having a nickel content of more than 50%, nickel is a base metal).
  • the portion of the electrode terminal 21 connected to the bus bar needs to be made of the same base metal as the bus bar.
  • the electrode terminal 21 is the electrode terminal of the negative electrode and the material of the bus bar is aluminum
  • copper-aluminum conversion is required. Since the first terminal plate 211 is farther away from the top cover 10 than the second terminal plate 212, the first terminal plate 211 connected to the bus bar uses aluminum as the base metal, and the second terminal plate 212 connected to the negative electrode plate is used. Copper is used as the base metal. Since the material of the first terminal plate 211 is made of aluminum as the base metal, the material of the second terminal plate 212 is made of copper as the base metal. Thereby, by the recombination of the first terminal plate 211 and the second terminal plate 212, the welding strength between the electrode terminal 21 and the outer bus bar and the tab 210 of the electrode assembly 200 inside the casing can be improved.
  • the sealing member 22 for sealing the electrode take-out hole 11 surrounds the electrode lead-out hole 11 and is fitted between the second terminal plate 212 and the top cover 10, which can reduce the occupation of the internal space of the battery case.
  • the energy density of the secondary battery is increased, and the probability that the sealing member 22 contacts the electrolyte inside the casing to cause swelling phenomenon is ensured, and the reliability of use of the secondary battery 1 is ensured.
  • the sealing member 22 surrounds the electrode extraction hole. 11 and being fitted between the second terminal plate 212 and the top cover 10 can prevent the electrolyte from corroding the first terminal plate 211, thereby improving the service life of the secondary battery 1.
  • the sealing member 22 is disposed between the top cover 10 and the electrode terminal 21, since the sealing member 22 is not in comparison with the existing top cover assembly There is no mutual pulling force between the two terminal plates, and instead, the pressure between the two terminal plates of the electrode terminal 21 can be provided by the sealing member 22 to each other. Therefore, it is possible to prevent the connection interface of the first terminal plate 211 and the second terminal plate 212 from being in a tensile stress state for a long period of time, thereby reducing the risk of breakage of the electrode terminal 21 and ensuring the reliability of use of the secondary battery 1.
  • FIG. 10 is a cross-sectional view of a top cover assembly 102 provided in accordance with yet another embodiment of the present application.
  • the same components as those in the top cover assembly 100 of the above-described embodiment are denoted by the same reference numerals, and the components that have been described in detail will not be described again.
  • the top cover assembly 100 in the above embodiment is different in that the electrode terminal 21 of the top cover assembly 102 further includes an extension portion 213 disposed on the terminal plate of the electrode terminal 21 and is connected to the extension.
  • the boss 214 of the portion 213 is connected to the extension portion 34 of the current collecting terminal 30 by the extending portion 213.
  • the extending portion 213 and the boss 214 are integrally formed on the terminal block.
  • the extension portion 213 is a cylindrical structure, and the area of the cross section of the terminal plate is larger than the area of the cross section of the extension portion 213. Further, the area of the cross section of the terminal plate is larger than the area of the cross section of the electrode extraction hole 11, and the area of the cross section of the extension portion 213 is smaller than the area of the cross section of the electrode extraction hole 11.
  • the terminal plate when the electrode terminal 21 is assembled from the top to the bottom, the terminal plate is located on the side of the top cover 10 facing away from the electrode assembly 200, and the extending portion 213 is penetrated through the electrode lead-out hole 11 so that the terminal plate abuts against the top
  • the cover plate 10 faces away from one side surface of the electrode assembly 200, thereby terminating the entire electrode terminal 21. That is, after the electrode terminal 21 is attached to the top cover 10, the outer peripheral surface of the terminal plate protrudes from the inner wall of the electrode lead-out hole 11.
  • the terminal plate serves as an external wiring portion to realize a connection with the bus bar; and the extension portion 213 serves as an inner wiring portion to realize connection with the tab 210 of the electrode assembly 200.
  • the extending portion 34 is provided with a mounting hole, and correspondingly, the surface of the extending portion 213 of the electrode terminal 21 facing the electrode assembly 200
  • a boss 214 is provided, the cross-sectional area of the boss 214 is smaller than the cross-sectional area of the extension 213, and the shape of the boss 214 matches the shape of the mounting hole.
  • the mounting hole is disposed at a substantially intermediate position of the extending portion 34, and the boss 214 extends from the lower surface of the extending portion 213 (ie, the surface facing the electrode assembly 200) toward the electrode assembly 200 and protrudes into the mounting hole.
  • the lower surface of the extending portion 213 is in contact with the upper surface of the extending portion 34 (i.e., the surface facing away from the electrode assembly 200), whereby the extending portion 213 and the extending portion 34 can be weldedly connected.
  • the extending portion 213 is The extension portion 34 forms an abutment fit, so that the electrode terminal 21 can function as a mounting and positioning by the boss 214 during the actual assembly process.
  • the welding operation of the extending portion 213 and the extending portion 34 is facilitated by the fitting of the mounting hole and the boss 214, so that the joint strength between the electrode terminal 21 and the current collecting terminal plate 30 can be improved.
  • the shapes of the respective cross sections of the mounting holes and the bosses 214 may also be correspondingly arranged to be rounded or square, thereby preventing the relative occurrence between the electrode terminals 21 and the current collecting terminal plates 30.
  • the purpose of the rotation is to improve the connection reliability between the electrode terminal 21 and the current collecting terminal block 30.
  • FIG. 11 is a cross-sectional structural view of a cap assembly 103 provided in accordance with yet another embodiment of the present application.
  • the same components as those of the above-described embodiment of the top cover assembly 103 are denoted by the same reference numerals, and the components that have been described in detail will not be described again.
  • the top cover assembly 100 in the above embodiment is different in that the electrode terminal 21 of the top cover assembly 103 further includes an extension portion 213 provided on the terminal plate.
  • the extending portion 213 is provided on the terminal plate in an integrally formed manner.
  • the area of the cross section of the terminal plate is larger than the area of the cross section of the extension portion 213, and the area of the cross section of the terminal plate is also larger than the area of the cross section of the electrode extraction hole 11, and the area of the cross section of the extension portion 213 is smaller than that of the electrode lead.
  • the terminal plate when the electrode terminal 21 is assembled from the top to the bottom, the terminal plate is located on the side of the top cover 10 facing away from the electrode assembly 200, and the extending portion 213 is penetrated through the electrode lead-out hole 11 so that the terminal plate abuts against the top
  • the cover plate 10 faces away from one side surface of the electrode assembly 200, thereby terminating the entire electrode terminal 21. That is, after the electrode terminal 21 is attached to the top cover 10, the outer peripheral surface of the terminal plate protrudes from the inner wall of the electrode lead-out hole 11.
  • the main body of the electrode terminal 21 serves as an external wiring portion to realize connection with the bus bar; and the extension portion 213 serves as an inner wiring portion to realize connection with the tab 210 of the electrode assembly 200.
  • the electrode terminal 21 forms a recess 215 on the side facing away from the electrode assembly 200 by providing the extension portion 213.
  • the electrode terminal 21 may be formed into a recess on the side facing the electrode assembly 200 by punching. 215.
  • the thickness of the electrode terminal 21 can be reduced, and laser welding can be realized at a small welding power when laser welding the electrode terminal 21 and the extending portion 34 are used; or Therefore, when ultrasonic welding of the electrode terminal 21 and the extending portion 34 is used, the ultrasonic transmission is more advantageous, so that ultrasonic welding can be realized with a small welding power.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention porte sur un ensemble couvercle d'une batterie secondaire et sur une batterie secondaire. L'ensemble couvercle de la batterie secondaire comprend : une plaque couvercle constituée d'un matériau plastique isolant et dotée d'un trou de sortie d'électrode ; une borne d'électrode comprenant une plaque de borne placée sur un côté de la plaque couvercle et recouvrant le trou de sortie d'électrode ; et un élément de connexion de collecte de courant comprenant une première partie de connexion et une partie d'extension reliée à la première partie de connexion, la première partie de connexion étant placée sur un côté de la plaque couvercle à distance de la plaque de borne et liée à la plaque couvercle, et la partie d'extension s'étendant dans le trou de sortie d'électrode de façon à être connectée à la borne d'électrode. L'invention peut faciliter une utilisation efficace d'un espace interne dans un boîtier d'une batterie secondaire, augmenter une densité d'énergie de la batterie secondaire, simplifier une structure d'une borne d'électrode, et réaliser un ou plusieurs objectifs concernant l'amélioration de l'efficacité de traitement d'une batterie secondaire.
PCT/CN2018/083381 2018-02-01 2018-04-17 Ensemble couvercle de batterie secondaire et batterie secondaire WO2019148662A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201820180683.7U CN207800665U (zh) 2018-02-01 2018-02-01 二次电池的顶盖组件以及二次电池
CN201820180683.7 2018-02-01

Publications (1)

Publication Number Publication Date
WO2019148662A1 true WO2019148662A1 (fr) 2019-08-08

Family

ID=63267719

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/083381 WO2019148662A1 (fr) 2018-02-01 2018-04-17 Ensemble couvercle de batterie secondaire et batterie secondaire

Country Status (2)

Country Link
CN (1) CN207800665U (fr)
WO (1) WO2019148662A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111403822A (zh) * 2020-04-22 2020-07-10 惠州亿纬锂能股份有限公司 一种锂电池及其制作方法
CN112331973A (zh) * 2020-04-17 2021-02-05 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池模块及装置
CN113078408A (zh) * 2021-03-10 2021-07-06 深圳市雄韬锂电有限公司 一种方形锂电池
CN113161657A (zh) * 2021-03-22 2021-07-23 深圳市长盈精密技术股份有限公司 焊接板体式电池顶盖
CN115066805A (zh) * 2020-09-30 2022-09-16 宁德时代新能源科技股份有限公司 电池单体、电池、用电装置、电池单体的制造方法及系统
CN115088132A (zh) * 2020-09-30 2022-09-20 宁德时代新能源科技股份有限公司 电池单体、电池、用电装置、电池单体的制造方法及系统
CN115715443A (zh) * 2021-05-26 2023-02-24 宁德时代新能源科技股份有限公司 固定构件、电池、用电装置及电池的制造方法和制造系统
CN115917829A (zh) * 2021-07-30 2023-04-04 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备及电池单体的制造设备
WO2023031105A3 (fr) * 2021-08-30 2023-04-13 Northvolt Ab Cellule secondaire
WO2023087285A1 (fr) * 2021-11-19 2023-05-25 宁德时代新能源科技股份有限公司 Élément de batterie, batterie, dispositif électrique, et procédé et appareil de fabrication d'élément de batterie
CN116250129A (zh) * 2021-04-30 2023-06-09 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备及电池的制造方法和设备
CN116365127A (zh) * 2023-05-31 2023-06-30 深圳海辰储能控制技术有限公司 端盖组件、储能装置、储能系统和用电设备
EP4213282A1 (fr) * 2022-01-14 2023-07-19 Samsung SDI Co., Ltd. Batterie secondaire
WO2023133853A1 (fr) * 2022-01-14 2023-07-20 宁德时代新能源科技股份有限公司 Cellule de batterie, batterie, dispositif électrique, procédé de fabrication de cellule de batterie, et dispositif
US11715867B2 (en) 2020-04-17 2023-08-01 Contemporary Amperex Technology Co., Limited End cover assembly, battery cell, battery module and device
WO2024098427A1 (fr) * 2022-11-11 2024-05-16 厦门海辰储能科技股份有限公司 Appareil de stockage d'énergie et dispositif électronique

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208690318U (zh) * 2018-09-26 2019-04-02 宁德时代新能源科技股份有限公司 一种电池单体的顶盖组件及电池单体
CN111106299A (zh) * 2018-11-07 2020-05-05 宁德时代新能源科技股份有限公司 二次电池及其制造方法
CN111162205A (zh) * 2018-11-07 2020-05-15 宁德时代新能源科技股份有限公司 二次电池以及二次电池的制造方法
CN109713353B (zh) * 2018-12-24 2020-12-11 江苏时代新能源科技有限公司 二次电池、二次电池装配方法及电池模组
CN111384352A (zh) * 2018-12-29 2020-07-07 宁德时代新能源科技股份有限公司 二次电池以及电池模组
CN111384349A (zh) * 2018-12-29 2020-07-07 宁德时代新能源科技股份有限公司 集流件以及二次电池
CN111384326A (zh) * 2018-12-29 2020-07-07 宁德时代新能源科技股份有限公司 二次电池和电池模组
CN111384353A (zh) * 2018-12-29 2020-07-07 宁德时代新能源科技股份有限公司 二次电池以及电池模组
CN111384351A (zh) * 2018-12-29 2020-07-07 宁德时代新能源科技股份有限公司 二次电池以及电池模组
CN210006769U (zh) * 2019-07-09 2020-01-31 宁德时代新能源科技股份有限公司 顶盖组件以及二次电池
CN112310517B (zh) 2019-10-15 2024-02-20 宁德时代新能源科技股份有限公司 二次电池、电池模块、电池组、装置及制造方法
CN210743993U (zh) * 2019-10-30 2020-06-12 宁德时代新能源科技股份有限公司 顶盖组件、二次电池、电池模块以及装置
CN112864524A (zh) * 2021-01-07 2021-05-28 合肥国轩高科动力能源有限公司 一种锂电池壳体以及锂电池
KR102637317B1 (ko) * 2021-08-23 2024-02-19 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 배터리 셀 및 그 제조 방법과 제조 시스템, 배터리 및 전기 장치
CN113937394A (zh) * 2021-08-31 2022-01-14 新余赣锋电子有限公司 一种预压焊接的电极连接件及可降噪高能量密度的钢壳电池
CN116670897A (zh) * 2021-10-20 2023-08-29 宁德时代新能源科技股份有限公司 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023173249A1 (fr) * 2022-03-14 2023-09-21 宁德时代新能源科技股份有限公司 Élément de batterie, batterie, dispositif électrique, et dispositif et procédé de fabrication d'élément de batterie
CN114614171A (zh) * 2022-04-12 2022-06-10 浙江极氪智能科技有限公司 电池组件以及极耳与盖板的连接方法
CN114784426A (zh) * 2022-04-12 2022-07-22 浙江极氪智能科技有限公司 一种动力电池盖板及动力电池
CN115051123B (zh) * 2022-08-11 2022-12-02 楚能新能源股份有限公司 一种全极耳电芯结构
CN115347287B (zh) * 2022-09-02 2023-11-10 宁夏宝丰昱能科技有限公司 电池顶盖、电池及电池制造方法
CN218919213U (zh) * 2022-09-28 2023-04-25 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150357670A1 (en) * 2014-06-09 2015-12-10 Gs Yuasa International Ltd. Energy storage device and method of manufacturing energy storage device
CN105226208A (zh) * 2014-06-23 2016-01-06 宁德新能源科技有限公司 贯通连接件、动力电池顶盖及动力电池
CN204946950U (zh) * 2015-09-21 2016-01-06 宁德时代新能源科技有限公司 动力电池及其顶盖结构
CN106257730A (zh) * 2015-06-16 2016-12-28 三星Sdi株式会社 可再充电电池
CN106601940A (zh) * 2017-01-06 2017-04-26 宁德时代新能源科技股份有限公司 动力电池顶盖结构、动力电池及电池模组

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150357670A1 (en) * 2014-06-09 2015-12-10 Gs Yuasa International Ltd. Energy storage device and method of manufacturing energy storage device
CN105226208A (zh) * 2014-06-23 2016-01-06 宁德新能源科技有限公司 贯通连接件、动力电池顶盖及动力电池
CN106257730A (zh) * 2015-06-16 2016-12-28 三星Sdi株式会社 可再充电电池
CN204946950U (zh) * 2015-09-21 2016-01-06 宁德时代新能源科技有限公司 动力电池及其顶盖结构
CN106601940A (zh) * 2017-01-06 2017-04-26 宁德时代新能源科技股份有限公司 动力电池顶盖结构、动力电池及电池模组

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112331973A (zh) * 2020-04-17 2021-02-05 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池模块及装置
US11715867B2 (en) 2020-04-17 2023-08-01 Contemporary Amperex Technology Co., Limited End cover assembly, battery cell, battery module and device
CN111403822A (zh) * 2020-04-22 2020-07-10 惠州亿纬锂能股份有限公司 一种锂电池及其制作方法
CN115066805A (zh) * 2020-09-30 2022-09-16 宁德时代新能源科技股份有限公司 电池单体、电池、用电装置、电池单体的制造方法及系统
CN115088132A (zh) * 2020-09-30 2022-09-20 宁德时代新能源科技股份有限公司 电池单体、电池、用电装置、电池单体的制造方法及系统
CN115088132B (zh) * 2020-09-30 2024-04-12 宁德时代新能源科技股份有限公司 电池单体、电池、用电装置、电池单体的制造方法及系统
CN115066805B (zh) * 2020-09-30 2024-04-12 宁德时代新能源科技股份有限公司 电池单体、电池、用电装置、电池单体的制造方法及系统
US11923551B2 (en) 2020-09-30 2024-03-05 Contemporary Amperex Technology Co., Limited Battery cell, battery, electric apparatus, and manufacturing method and system of battery cell
CN113078408A (zh) * 2021-03-10 2021-07-06 深圳市雄韬锂电有限公司 一种方形锂电池
CN113161657A (zh) * 2021-03-22 2021-07-23 深圳市长盈精密技术股份有限公司 焊接板体式电池顶盖
CN113161657B (zh) * 2021-03-22 2022-09-20 宜宾长盈精密技术有限公司 焊接板体式电池顶盖
CN116250129A (zh) * 2021-04-30 2023-06-09 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备及电池的制造方法和设备
CN115715443A (zh) * 2021-05-26 2023-02-24 宁德时代新能源科技股份有限公司 固定构件、电池、用电装置及电池的制造方法和制造系统
CN115917829B (zh) * 2021-07-30 2024-01-12 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备及电池单体的制造设备
CN115917829A (zh) * 2021-07-30 2023-04-04 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备及电池单体的制造设备
WO2023031108A3 (fr) * 2021-08-30 2023-04-13 Northvolt Ab Élément secondaire
US11888182B2 (en) 2021-08-30 2024-01-30 Northvolt Ab Secondary cell
WO2023031105A3 (fr) * 2021-08-30 2023-04-13 Northvolt Ab Cellule secondaire
WO2023087285A1 (fr) * 2021-11-19 2023-05-25 宁德时代新能源科技股份有限公司 Élément de batterie, batterie, dispositif électrique, et procédé et appareil de fabrication d'élément de batterie
EP4213282A1 (fr) * 2022-01-14 2023-07-19 Samsung SDI Co., Ltd. Batterie secondaire
WO2023133853A1 (fr) * 2022-01-14 2023-07-20 宁德时代新能源科技股份有限公司 Cellule de batterie, batterie, dispositif électrique, procédé de fabrication de cellule de batterie, et dispositif
WO2024098427A1 (fr) * 2022-11-11 2024-05-16 厦门海辰储能科技股份有限公司 Appareil de stockage d'énergie et dispositif électronique
CN116365127A (zh) * 2023-05-31 2023-06-30 深圳海辰储能控制技术有限公司 端盖组件、储能装置、储能系统和用电设备
CN116365127B (zh) * 2023-05-31 2023-07-28 深圳海辰储能控制技术有限公司 端盖组件、储能装置、储能系统和用电设备

Also Published As

Publication number Publication date
CN207800665U (zh) 2018-08-31

Similar Documents

Publication Publication Date Title
WO2019148662A1 (fr) Ensemble couvercle de batterie secondaire et batterie secondaire
WO2019148663A1 (fr) Batterie secondaire
US11482761B2 (en) Secondary battery and battery module
US20230178788A1 (en) Cap assembly for secondary battery, secondary battery and battery module
US9136520B2 (en) Battery module
CN211629211U (zh) 二次电池、电池模块以及使用二次电池作为电源的装置
EP2228852A1 (fr) Batterie rechargeable comprenant des plaques collectrices de courant avec une structure améliorée
KR102567831B1 (ko) 이차 전지
JP2011146379A (ja) 二次電池
JP2011040381A (ja) 二次電池
CN208622794U (zh) 二次电池及其顶盖组件
KR20100068080A (ko) 이차 전지
WO2019051630A1 (fr) Ensemble couvercle supérieur de batterie secondaire et batterie secondaire
JP5203729B2 (ja) 二次電池及び電池モジュール
CN109728208B (zh) 二次电池的顶盖组件、二次电池以及电池模组
JP2008112723A (ja) 二次電池
CN109671878B (zh) 电池顶盖组件及二次电池
CN216773359U (zh) 电池及电池组
US11050116B2 (en) Secondary battery
KR101201815B1 (ko) 이차 전지
CN112736337A (zh) 盖板组件及应用所述盖板组件的电池
CN218769974U (zh) 电池组及电池装置
CN216213742U (zh) 电池盖板组件及电池
CN115566328B (zh) 电化学装置以及用电装置
CN218569161U (zh) 一种圆柱型电池单体及电池模组

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18904346

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18904346

Country of ref document: EP

Kind code of ref document: A1