WO2026026945A1 - 电池端盖组件、电池和用电设备 - Google Patents

电池端盖组件、电池和用电设备

Info

Publication number
WO2026026945A1
WO2026026945A1 PCT/CN2025/112109 CN2025112109W WO2026026945A1 WO 2026026945 A1 WO2026026945 A1 WO 2026026945A1 CN 2025112109 W CN2025112109 W CN 2025112109W WO 2026026945 A1 WO2026026945 A1 WO 2026026945A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarity connection
cover plate
end cap
assembly
battery
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2025/112109
Other languages
English (en)
French (fr)
Inventor
姚吕华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYD Co Ltd
Original Assignee
BYD Co Ltd
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 BYD Co Ltd filed Critical BYD Co Ltd
Publication of WO2026026945A1 publication Critical patent/WO2026026945A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This disclosure relates to the field of battery technology, and in particular to a battery end cap assembly, a battery, and an electrical device.
  • the cover plate of a cylindrical battery is generally provided with two terminals, one terminal connected to the positive tab and the other terminal connected to the negative tab.
  • the terminal connected to the positive tab is the positive terminal
  • the terminal connected to the negative tab is the negative terminal.
  • the cover plate of a cylindrical battery is generally provided with one positive terminal and one negative terminal. This reduces the current transmission channels and increases the resistance of current inside the battery. As a result, the terminals of a cylindrical battery have a weak overcurrent capacity.
  • this disclosure aims to at least address one of the technical problems existing in the prior art. To this end, this disclosure proposes a battery end cap assembly that can increase the current transmission channel and reduce the current resistance inside the battery, thereby improving the current carrying capacity of the battery end cap assembly, increasing the current conduction effect, and also improving the rate performance of the battery.
  • This disclosure further proposes a battery.
  • This disclosure also proposes an electrical device.
  • a battery end cap assembly includes: a cover plate assembly having a plurality of spaced-apart first polarity connection portions; and a current collector having a second polarity connection portion, wherein the plurality of first polarity connection portions are electrically connected to the second polarity connection portions such that the plurality of first polarity connection portions have the same electrical polarity.
  • the orthographic projection area of the plurality of first polarity connecting portions in a first direction is S1
  • the orthographic projections of a plurality of the first polarity connection portions are located within the orthographic projections of the second polarity connection portions, and the first projection plane is perpendicular to a first direction.
  • multiple second polarity connection portions there are multiple second polarity connection portions, and multiple first polarity connection portions are correspondingly connected to multiple second polarity connection portions.
  • the projected area of each second polarity connection in the first direction is greater than the projected area of the corresponding first polarity connection in the first direction.
  • the current collector is provided with a cell connection portion, and the cell connection portion is spaced apart from the second polarity connection portion.
  • the second polarity connection portion is configured as a first protrusion protruding in a direction adjacent to the cover plate assembly, and the cell connection portion is configured as a second protrusion protruding in a direction away from the cover plate assembly.
  • the protrusion height of the first protrusion is h1
  • the protrusion height of the second protrusion is h2
  • h1:h2 (2-60):1 wherein h1 and h2 are measured in the same unit.
  • the cover plate assembly includes a cover plate and a plurality of pole posts, the plurality of pole posts being spaced apart and mounted on the cover plate, each pole post being provided with a first polarity connection portion.
  • the cover plate has a through hole;
  • the pole post includes a first pole post body, the first pole post body passes through the through hole, the first pole post body includes a first side adjacent to the collector plate and a second side away from the collector plate, the first side is provided with a first polarity connection portion; and a second pole post body, the second pole post body is connected to the second side of the first pole post body.
  • the first pole post includes: a connecting plate, the connecting plate being configured as the first polarity connecting portion; a connecting cylinder, one end of the connecting cylinder being connected to the connecting plate and passing through the through hole; and a flange, the flange being connected to the end of the connecting cylinder away from the connecting plate, and the flange being connected to the second pole post.
  • the second pole body has an inner hole and a first stepped groove surrounding the inner hole, the connecting cylinder passes through the inner hole, and the flange is disposed in the first stepped groove.
  • the cover plate assembly further includes: a first insulating seal disposed between the cover plate and the second pole piece and between the inner wall of the through hole and the outer wall of the connecting cylinder; and a second insulating seal disposed between the connecting plate and the cover plate and between the inner wall of the through hole and the outer wall of the connecting cylinder, the second insulating seal being connected to the first insulating seal and located on the side of the first insulating seal adjacent to the collector plate.
  • the cover plate assembly further includes: a pole cap, wherein the second pole body has a second stepped groove formed on the side away from the first pole body, and the pole cap is disposed in the second stepped groove.
  • the cover plate assembly includes: a cover plate having a plurality of first polarity connection portions.
  • the cover plate has a plurality of grooves, the bottom of the plurality of grooves being configured as the first polarity connection portion; the cover plate assembly further includes: an electrode cap, the cover plate having a third stepped groove surrounding the grooves, the electrode cap being disposed in the third stepped groove.
  • the gap has a dimension d in the first direction, and d satisfies the relationship: 0.1mm ⁇ d ⁇ 1mm.
  • the orthographic projection outer contours of a plurality of the first polarity connection portions are symmetrically distributed about the center of the orthographic projection outer contour of the cover plate assembly, and the second projection plane is perpendicular to the first direction.
  • the first polarity connection portion and the second polarity connection portion are connected by welding.
  • the cover plate assembly includes an injection hole and an explosion-proof valve.
  • the orthographic projection of the injection hole covers the center of the orthographic projection outer contour of the cover plate assembly, or the orthographic projection of the explosion-proof valve covers the center of the orthographic projection outer contour of the cover plate assembly.
  • the third projection plane is perpendicular to the first direction.
  • a battery according to a second aspect of this disclosure includes: the battery end cap assembly described above; and further includes: a battery cell connected to the current collector; and a housing, wherein the battery cell is disposed within the housing, and the cover plate assembly is disposed at at least one end of the housing.
  • An electrical device includes: the battery end cap assembly described above or the battery described above.
  • this electrical device can improve current carrying capacity, increase current conduction effect, improve battery rate performance, and avoid leakage problems caused by penetration welding, thereby improving the safety of the electrical device.
  • Figure 1 is a schematic diagram of the structure of a battery according to an embodiment of the present disclosure
  • Figure 2 is an enlarged view of region A in Figure 1;
  • Figure 3 is a structural schematic diagram of a cover plate assembly with an explosion-proof valve according to an embodiment of the present disclosure
  • Figure 4 is a schematic diagram of the cover plate assembly with an injection hole according to an embodiment of the present disclosure
  • Figure 5 is a cross-sectional view of a cover plate assembly with an explosion-proof valve according to an embodiment of the present disclosure
  • Figure 6 is a cross-sectional view of the cover plate assembly with an injection hole according to an embodiment of the present disclosure
  • Figure 7 is a schematic diagram of the structure of a battery according to another embodiment of the present disclosure.
  • Figure 8 is an enlarged view of region B in Figure 7;
  • Figure 9 is a schematic diagram of the structure of the collector disk according to an embodiment of the present disclosure.
  • Figure 10 is a cross-sectional view of the manifold according to an embodiment of the present disclosure.
  • Figure 11 is a schematic block diagram of an electrical appliance according to an embodiment of the present disclosure.
  • Figure 12 is another schematic block diagram of an electrical appliance according to an embodiment of the present disclosure.
  • the battery end cap assembly of the first aspect embodiment of this disclosure includes: a cover plate assembly 10 and a current collector 20.
  • the cover plate assembly 10 is provided with a plurality of spaced-apart first polarity connection portions 11, and the current collector 20 is provided with second polarity connection portions 21.
  • the plurality of first polarity connection portions 11 are electrically connected to the second polarity connection portions 21, thereby making the plurality of first polarity connection portions 11 have the same electrical polarity.
  • the cover of a traditional cylindrical battery typically has two terminals: one connected to the positive tab and the other to the negative tab.
  • the terminal connected to the positive tab is the positive terminal
  • the terminal connected to the negative tab is the negative terminal.
  • Cylindrical batteries use one positive terminal and one negative terminal on each side, which reduces the current transmission channels and increases the resistance of current inside the battery, resulting in a weak overcurrent capacity of the cylindrical battery terminals.
  • the cover assembly 10 in the battery 100 is provided with a plurality of spaced first polarity connection portions 11, which facilitates the electrical connection between the cover assembly 10 and the second polarity connection portion 21 of the current collector 20.
  • the arrangement of multiple first polarity connection portions 11 can prevent short circuits in the electrical connection between the cover assembly 10 and the current collector 20, thereby further improving the stability of the electrical connection between the cover assembly 10 and the current collector 20.
  • the provision of the first polarity connection portion 11 of the cover plate assembly 10 and the second polarity connection portion 21 of the collector plate 20 can increase the contact area and connection strength between the cover plate assembly 10 and the collector plate 20.
  • each of the multiple first polarity connection portions 11 is electrically connected to the second polarity connection portion 21, thereby enabling the cover plate assembly 10 to form electrodes of the same polarity corresponding one-to-one with the multiple first polarity connection portions 11. That is, when the tab connected to the cell 91 at the current collector 20 is a positive tab, the second polarity connection portion 21 of the current collector 20 is electrically connected to the positive tab. This allows the first polarity connection portion 11 connected to the second polarity connection portion 21 to be positively charged, thereby enabling the cover plate assembly 10 to form a positive electrode corresponding to the first polarity connection portion 11. Since multiple first polarity connection portions 11 are provided, the cover plate assembly 10 can form multiple positive electrodes corresponding to the multiple first polarity connection portions 11.
  • the second polarity connection portion 21 of the current collector 20 is electrically connected to the negative tab.
  • the cover plate assembly 10 forms multiple electrodes of the same polarity corresponding to the multiple first polarity connection portions 11, which can increase the current transmission channel and thereby improve the overcurrent capability of the cover plate assembly 10 of the battery 100.
  • the cover plate assembly 10 of the battery 100 forms electrodes of the same polarity that correspond one-to-one with the plurality of first polarity connection portions 11. This can increase the current transmission channel and reduce the resistance of current inside the battery 100, thereby improving the current carrying capacity of the battery end cover assembly, increasing the current guiding effect, and also improving the rate performance of the battery 100.
  • the orthographic projection area of the plurality of first polarity connecting portions 11 in the first direction is S1
  • the first direction is the thickness direction of the first polarity connection 11.
  • the projected area of the multiple first polarity connection 11 in the first direction accounts for 20%-40% of the projected area of the cover plate assembly 10, thereby improving the flow guiding effect of the first polarity connection 11.
  • the orthographic projections of a plurality of first polarity connection portions 11 are located within the orthographic projection of the second polarity connection portion 21, and the first projection plane is perpendicular to the first direction. This allows for sufficient contact between the first polarity connection portion 11 and the second polarity connection portion 21, thereby further improving the stability of the electrical connection between the first polarity connection portion 11 and the second polarity connection portion 21.
  • the projected area of the second polarity connection 21 in the first direction accounts for 80%-150% of the projected area of the plurality of first polarity connection parts 11 in the first direction. In this way, the contact area between the second polarity connection 21 and the plurality of first polarity connection parts 11 can be increased, thereby improving the flow guiding effect between the second polarity connection 21 and the plurality of first polarity connection parts 11.
  • the projected area of the second polarity connection 21 in the first direction accounts for 101%-130% of the projected area of the plurality of first polarity connection parts 11 in the first direction. This can further increase the contact area between the second polarity connection 21 and the plurality of first polarity connection parts 11, thereby further improving the flow guiding effect of the second polarity connection 21 and the plurality of first polarity connection parts 11.
  • FIG1 and FIG2 there are multiple second polarity connection portions 21, and multiple first polarity connection portions 11 are connected to multiple second polarity connection portions 21 in a one-to-one correspondence.
  • the second polarity connection portion 21 is provided corresponding to the first polarity connection portion 11, and the multiple first polarity connection portions 11 are connected to the multiple second polarity connection portions 21 in a one-to-one correspondence, thereby forming multiple current channels between the multiple first polarity connection portions 11 and the multiple second polarity connection portions 21.
  • each second polarity connection portion 21 in the first direction is larger than the projected area of the corresponding first polarity connection portion 11 in the first direction. This ensures that the first polarity connection portion 11 is sufficiently electrically connected to the second polarity connection portion 21, thereby increasing the current path.
  • the collector plate 20 is provided with a cell connection portion 22, and the cell connection portion 22 and a plurality of second polarity connection portions 21 are spaced apart in the circumferential direction of the collector plate 20.
  • the inclusion of the cell connection portion 22 in the current collector 20 facilitates the connection between the cell connection portion 22 and the cell 91, and also increases the contact area between the cell connection portion 22 and the cell 91, making the connection between the cell connection portion 22 and the cell 91 more stable, thereby improving the stability of the electrical connection between the current collector 20 and the cell 91.
  • the arrangement of multiple second polarity connection parts 21 on the current collector 20 can make the connection between the current collector 20 and the first polarity connection part 11 more convenient and stable, and can also improve the current carrying capacity between the current collector 20 and the cover plate assembly 10.
  • FIG9 there are multiple cell connection portions 22.
  • at least one cell connection portion 22 is provided between two adjacent second polarity connection portions 21.
  • the two second polarity connection parts 21 are arranged at intervals relative to each other, and four battery cell connection parts 22 are arranged between the two second polarity connection parts 21. All four battery cell connection parts 22 are connected to the battery cell 91, thereby further ensuring the stability of the electrical connection between the battery cell 91 and the current collector 20.
  • the second polarity connection portion 21 is configured as a first protrusion protruding toward the adjacent cover plate assembly 10
  • the cell connection portion 22 is configured as a second protrusion protruding toward the direction away from the cover plate assembly 10.
  • the second polarity connection portion 21 is constructed as a first protrusion protruding towards the adjacent cover plate assembly 10.
  • the first protrusion is formed by stamping and partial drawing or bridging. This not only provides a buffering effect during the assembly of the cover plate assembly 10, but also, due to the gap between the first protrusion and the tab, facilitates rapid electrolyte wetting during the filling of the cell 91. Furthermore, this increases the strength and rigidity of the connection between the second polarity connection portion 21 and the cover plate assembly 10, ensuring a more secure and reliable connection between the cell 91 and the cover plate assembly 10.
  • the first protrusion provides a larger contact area for the connection between the second polarity connection portion 21 and the cover plate assembly 10, increases the stability of the connection, reduces loosening, and thus improves the safety of the battery 100.
  • the cell connection portion 22 is configured as a second protrusion protruding in a direction away from the cover plate assembly 10.
  • the second protrusion can provide a larger contact area for the connection between the current collector 20 and the cell 91, increase the stability of the connection between the current collector 20 and the cell 91, and reduce loosening.
  • the protrusion height of the first protrusion is h1
  • the protrusion height of the second protrusion is h2
  • h1:h2 (2-60):1 wherein h1 and h2 are measured in the same unit.
  • the protrusion height h1 of the first protrusion is designed to range from 0.2mm to 3.0mm
  • the protrusion height h2 of the second protrusion is designed to range from 0.05mm to 0.4mm.
  • h1/h2 (2-60):1.
  • h1 is used to buffer and absorb the tolerance of the structural components when the cover is closed
  • h2 is used to locally compact and improve the fit of the welding surface 92 of the electrode ear.
  • the cell connection portion 22 is fan-shaped or elongated on the current collector 20, and/or the second polarity connection portion 21 is trapezoidal, rectangular, fan-shaped or elongated on the current collector 20.
  • the cell connection part 22 is arranged in a fan shape or a strip shape on the current collector 20, which can increase the rigidity of the current collector 20 and also facilitate the contact between the cell connection part 22 and the electrode welding surface 92.
  • the second polarity connection 21 is arranged in a trapezoidal, rectangular, fan-shaped or elongated shape on the collector plate 20, which can further increase the rigidity of the collector plate 20, make the force on the second polarity connection 21 more uniform, and reduce the accumulation of heat in the second polarity connection 21.
  • the cover plate assembly 10 includes: a cover plate 12 and a plurality of pole posts 13, the plurality of pole posts 13 being spaced apart and installed on the cover plate 12, and each pole post 13 being provided with a first polarity connection portion 11.
  • the cover plate 12 can be provided with two pole posts 13, which are spaced apart on the cover plate 12. Since each pole post 13 is provided with a first polarity connection part 11, which is connected to the current collector 20, it is easy for the two pole posts 13 to form a pole post 13 of the same polarity, thereby improving the current flow capacity at the cover plate 12.
  • the cover plate 12 is formed with a through hole 14, and the pole post 13 includes a first pole post 131 and a second pole post 132.
  • the first pole post 131 includes a first side adjacent to the collector plate 20 and a second side away from the collector plate 20, and the first pole post 131 is provided with a first polarity connection portion 11.
  • the second pole post 132 is connected to the second side of the first pole post 131.
  • the cover plate 12 is provided with a through hole 14, which facilitates the installation of the pole post 13.
  • the pole post 13 is mainly composed of a first pole post 131 and a second pole post 132.
  • the first pole post 131 is provided with a through hole 14, which facilitates the connection between the first pole post 131 and the collector plate 20.
  • first pole post 131 is located on the side of the cover plate 12 adjacent to the collector plate 20.
  • the first pole post 131 is provided with a first polarity connection part 11.
  • the first pole post 131 is connected to the collector plate 20 through the first polarity connection part 11. In this way, the stability of the connection between the first pole post 131 and the collector plate 20 can be improved.
  • the second pole piece 132 is located on the side of the cover plate 12 away from the collector plate 20.
  • the second pole piece 132 is connected to the second side of the first pole piece 131. This facilitates the installation of the pole piece 13, reduces the impact of heat on the collector plate 20, and reduces the accumulation of heat in the connection area between the first polarity connection part 11 and the collector plate 20.
  • the first pole post 131 includes a connecting plate, a connecting cylinder 133 and a flange 134.
  • the connecting plate is configured as a first polarity connecting part 11.
  • One end of the connecting cylinder 133 is connected to the connecting plate, and the connecting cylinder 133 is provided with a through hole 14.
  • the flange 134 is connected to the end of the connecting cylinder 133 away from the connecting plate, and the flange 134 is connected to the second pole post 132.
  • the first polarity connection part 11 is a connecting plate, which can facilitate the connection between the first pole post 131 and the collector plate 20, and can also increase the contact area between the connecting plate and the collector plate 20.
  • connection cylinder 133 facilitates the connection between the first pole piece 131 and the second pole piece 132. Furthermore, the middle part of the connection cylinder 133 is hollow, which facilitates through welding of the connection plate from the outside.
  • the flange 134 can increase the strength of the connection between the first pole piece 131 and the second pole piece 132, provide a more secure connection, and ensure the stability and reliability of the connection between the first pole piece 131 and the second pole piece 132, thereby reducing the risk of failure caused by loosening of the connection between the first pole piece 131 and the second pole piece 132.
  • the second pole post 132 is formed with an inner hole 135 and a first stepped groove 136 surrounding the inner hole 135, the connecting cylinder 133 passes through the inner hole 135, and the flange 134 is disposed in the first stepped groove 136.
  • the second pole post 132 has an inner hole 135, which facilitates the insertion of the connecting cylinder 133.
  • the second pole post 132 also has a first stepped groove 136, and the flange 134 is connected to the first stepped groove 136, thereby increasing the contact area between the flange 134 and the first stepped groove 136 and increasing the connection strength between the flange 134 and the first stepped groove 136.
  • the cover plate assembly 10 further includes: a first insulating seal 30 and a second insulating seal 40.
  • the first insulating seal 30 abuts between the cover plate 12 and the second pole post 132, and abuts between the inner wall of the through hole 14 and the outer wall of the connecting cylinder 133.
  • the second insulating seal 40 abuts between the connecting plate and the cover plate 12, and abuts between the inner wall of the through hole 14 and the outer wall of the connecting cylinder 133.
  • the second insulating seal 40 is connected to the first insulating seal 30 and is located on the side of the first insulating seal 30 adjacent to the collector plate 20.
  • a first insulating seal 30 and a second insulating seal 40 are provided between the first pole piece 131 and the second pole piece 132.
  • the first insulating seal 30 abuts against the cover plate 12 and the second pole piece 132, which can insulate and seal the cover plate 12 and the second pole piece 132, thereby preventing the current from flowing from the second pole piece 132 to the cover plate 12.
  • the first insulating seal 30 abuts between the inner wall of the through hole 14 and the outer wall of the connecting cylinder 133, thereby preventing the current from flowing from the connecting cylinder 133 to the cover plate 12.
  • the second insulating seal 40 abuts between the connecting plate and the cover plate 12, which can prevent electrolyte from appearing between the connecting plate and the cover plate 12, thereby ensuring the sealing between the connecting plate and the cover plate 12.
  • the second insulating seal 40 abuts against the inner wall of the through hole 14 and the outer wall of the connecting cylinder 133, which increases the sealing between the inner wall of the through hole 14 and the outer wall of the connecting cylinder 133, thereby preventing electrolyte from flowing to the cover plate 12.
  • the second insulating seal 40 is located on the side of the first insulating seal 30 adjacent to the current collector 20, thus further improving the sealing between the first insulating seal 30 and the current collector 20, thereby ensuring the safety of the inside of the battery 100.
  • the cover plate assembly 10 further includes an pole post cover 50, and the second pole post 132 has a second stepped groove 137 formed on the side away from the first pole post 131, and the pole post cover 50 is disposed in the second stepped groove 137.
  • the terminal cap 50 further prevents leakage from weld holes caused by through-welding of the terminal 13.
  • the terminal cap 50 can further seal the weld, thereby improving the reliability of the terminal 13.
  • the corresponding welding position is first identified by a CCD camera and the terminal cap 50 is closed before through-welding is performed on the outside of the cell 91, which simplifies the welding difficulty of the cell 91.
  • the second pole piece 132 has a second stepped groove 137, which facilitates the insertion of the pole piece cap 50 into the second stepped groove 137, thereby enabling the pole piece cap 50 to further perform the function of sealing.
  • the pole piece cap 50 is compressed and fitted to the bottom of the second stepped groove 137, and after welding, the connection and flow guidance are performed by external penetration welding.
  • the pole post 13 is annular, rectangular, fan-shaped, arc-shaped, or circular.
  • the pole 13 is arranged in a ring, rectangle, fan shape, arc or circle, which can better adapt to different scenario requirements and can also change the current distribution at the pole 13.
  • the cover plate assembly 10 includes a cover plate 12, which is provided with a plurality of first polarity connecting portions 11.
  • the cover plate 12 is provided with a plurality of first polarity connection parts 11, which facilitates the connection between the first polarity connection parts 11 and the collector plate 20, thereby making the connection between the cover plate 12 and the collector plate 20 more stable.
  • the cover plate 12 is formed with a plurality of grooves 60, the bottom of the plurality of grooves 60 is constructed as a first polarity connection portion 11, and the cover plate assembly 10 further includes: an pole cap 50, the cover plate 12 is formed with a third step groove 70 surrounding the grooves 60, and the pole cap 50 is disposed in the third step groove 70.
  • the cover plate 12 has multiple grooves 60, which allows the cover plate 12 to form multiple first polarity connection parts 11, thereby facilitating the connection of the cover plate 12 with the collector plate 20 through the first polarity connection parts 11.
  • pole cap 50 is embedded into the third step groove 70, which allows the pole cap 50 to further perform the function of sealing and plugging.
  • the dimension of the gap in the first direction is d, and d satisfies the relationship: 0.1mm ⁇ d ⁇ 1mm.
  • the gap is in the range of 0.1mm-1.0mm, which can prevent the weld scar at the groove 60 from protruding and pressing against the pole cap 50, and can also ensure the consistency of the assembly position of the pole cap 50.
  • the first polarity connection portion 11 and the second polarity connection portion 21 are connected by welding. This makes the connection between the first polarity connection portion 11 and the second polarity connection portion 21 more stable and secure.
  • the orthographically projected outer contours of a plurality of first polarity connection portions 11 are symmetrically distributed about the center of the orthographically projected outer contour of the cover plate assembly 10, and the second projection plane is perpendicular to the first direction. This not only increases the current-carrying capacity of the cover plate assembly 10, but also makes the current at the cover plate assembly 10 more uniform.
  • the cover plate assembly 10 includes an injection hole 80 and an explosion-proof valve 90.
  • the orthographic projection of the injection hole 80 covers the center of the orthographic projection outer contour of the cover plate assembly 10
  • the orthographic projection of the explosion-proof valve 90 covers the center of the orthographic projection outer contour of the cover plate assembly 10.
  • the third projection plane is perpendicular to the first direction.
  • the explosion-proof valve 90 When the internal pressure of the battery cell 91 is too high, the explosion-proof valve 90 is opened to release the pressure, thereby preventing the battery 100 from exploding.
  • the explosion-proof valve 90 can be ring-shaped, rectangular, or circular, and can be set according to the actual situation.
  • the explosion-proof valve 90 is positioned opposite to the winding hole of the battery cell 91, and the explosion-proof valve 90 and the winding hole of the battery cell 91 are on the same central axis. When a short circuit occurs inside the battery 100 and a fire breaks out, it can facilitate the removal of gas more effectively than the offset explosion-proof valve 90, thereby improving the safety of the battery 100.
  • injection hole 80 is located at the center of the cover plate assembly 10, which simplifies the positioning difficulty of injecting liquid into the battery 100.
  • the battery cell 91 is connected to the current collector 20 to facilitate the transmission of current.
  • the battery cell 91 is located inside the housing 93, which protects the battery cell 91.
  • the cover plate assembly 10 can be set at both ends of the housing 93 to facilitate the formation of a current flow path inside the battery cell 91.
  • the battery 100 includes: an end cap assembly, a battery cell 91 and a housing 93 as described above.
  • the battery cell 91 is connected to a current collector 20 and is disposed inside the housing 93.
  • the cover assembly 10 is disposed at at least one end of the housing 93.
  • the cover assembly 10 in the battery 100 can be used for steel-cased cylindrical batteries or rectangular batteries.
  • the electrical device 200 includes: an end cap assembly of any of the first aspects described above (as shown in FIG11) or a battery 100 of any of the second aspects described above (as shown in FIG12).
  • center In the description of this disclosure, it should be understood that the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
  • references to terms such as “one embodiment,” “some embodiments,” “illustrative embodiment,” “example,” “specific example,” or “some examples,” etc. refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure.
  • the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种用电设备包括电池或电池端盖组件，该电池包括电池端盖组件。该电池端盖组件包括盖板组件和集流盘。该盖板组件设置有多个间隔设置的第一极性连接部，该集流盘设置有第二极性连接部，多个该第一极性连接部均与该第二极性连接部电连接，从而可以使多个该第一极性连接部的电性相同。

Description

电池端盖组件、电池和用电设备
相关申请的交叉引用
本申请要求在2024年8月2日提交至中国国家知识产权局、申请号为202411052990.3、名称为“电池端盖组件、电池和用电设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及电池技术领域，尤其是涉及一种电池端盖组件、电池和用电设备。
背景技术
现有技术中，圆柱形电池的盖板一般设置有两个极柱，一个极柱与正极耳连接，另一个极柱与负极耳连接，与正极耳连接的极柱为正极柱，与负极耳连接的极柱为负极柱，圆柱电池的盖板一般设置有一个正极柱和一个负极柱，这样电流传输通道较少，增加了电流在电池内部的阻力，存在圆柱形电池的极柱存在过流能力较弱的问题。
公开内容
本公开旨在至少解决现有技术中存在的技术问题之一。为此，本公开提出了一种电池端盖组件，该电池端盖组件可以增加电流传输的通道，也可以减小电流在电池内部的阻力，从而可以提高电池端盖组件的过流能力，增加导流效果，也可以提高电池的倍率性能。
本公开进一步地提出一种电池。
本公开还提出一种用电设备。
根据本公开第一方面实施例的电池端盖组件，包括：盖板组件，所述盖板组件设置有多个间隔设置的第一极性连接部；和集流盘，所述集流盘设置有第二极性连接部，多个所述第一极性连接部均与所述第二极性连接部电连接，以使多个所述第一极性连接部的电性相同。
根据本公开的一些实施例，多个所述第一极性连接部在第一方向上的正投影面积为S1，所述盖板组件在第一方向上的正投影面积为S2，S1:S2＝(0.2-0.4):1，其中S1和S2以相同单位计。
根据本公开的一些实施例，在第一投影面上，多个所述第一极性连接部的正投影位于所述第二极性连接部的正投影内，所述第一投影面垂直于第一方向。
根据本公开的一些实施例，所述第二极性连接部在第一方向上的投影面积为S3，多个所述第一极性连接部在第一方向上的投影面积为S4，S3:S4＝(0.8-1.5):1，其中S3和S4以相同单位计。
根据本公开的一些实施例，所述第二极性连接部在第一方向上的投影面积为S3，多个所述第一极性连接部在第一方向上的投影面积为S4，S3:S4＝(1.01-1.3):1，其中S3和S4以相同单位计。
根据本公开的一些实施例，所述第二极性连接部为多个，多个所述第一极性连接部与多个所述第二极性连接部对应连接。
根据本公开的一些实施例，每个所述第二极性连接部在第一方向上的投影面积均大于对应的所述第一极性连接部在第一方向上的投影面积。
根据本公开的一些实施例，所述集流盘设置有电芯连接部，所述电芯连接部与所述第二极性连接部间隔设置。
根据本公开的一些实施例，所述电芯连接部为多个，在所述集流盘的周向上，相邻的两个所述第二极性连接部之间设置有至少一个所述电芯连接部。
根据本公开的一些实施例，所述第二极性连接部构造为朝向邻近所述盖板组件的方向凸出的第一凸起部，所述电芯连接部构造为朝向远离所述盖板组件的方向凸出的第二凸起部。
根据本公开的一些实施例，所述第一凸起部的凸起高度为h1，所述第二凸起部的凸起高度为h2，h1:h2＝(2-60):1，其中，h1和h2以相同单位计。
根据本公开的一些实施例，所述盖板组件包括盖板；和多个极柱，多个所述极柱间隔地安装于所述盖板，每个所述极柱均设置有所述第一极性连接部。
根据本公开的一些实施例，所述盖板形成有通孔；所述极柱包括第一极柱体，所述第一极柱体穿设所述通孔，所述第一极柱体包括邻近所述集流盘的第一侧和远离所述集流盘的第二侧，所述第一侧设置有所述第一极性连接部；和第二极柱体，所述第二极柱体与所述第一极柱体的第二侧连接。
根据本公开的一些实施例，所述第一极柱体包括：连接板，所述连接板构造为所述第一极性连接部；连接筒，所述连接筒的一端与所述连接板连接且穿设所述通孔；和翻边，所述翻边连接于所述连接筒远离所述连接板的一端，所述翻边与所述第二极柱体连接。
根据本公开的一些实施例，所述第二极柱体形成有内孔和围绕所述内孔设置的第一台阶槽，所述连接筒穿设所述内孔，所述翻边设置于所述第一台阶槽。
根据本公开的一些实施例，所述盖板组件还包括：第一绝缘密封件，所述第一绝缘密封件设置于所述盖板和所述第二极柱体之间以及设置于所述通孔的内壁和所述连接筒的外壁之间；和第二绝缘密封件，所述第二绝缘密封件设置于所述连接板和所述盖板之间以及设置于所述通孔的内壁和所述连接筒的外壁之间，所述第二绝缘密封件与所述第一绝缘密封件连接并位于第一绝缘密封件邻近所述集流盘的一侧。
根据本公开的一些实施例，所述盖板组件还包括：极柱盖，所述第二极柱体在远离所述第一极柱体的一侧形成有第二台阶槽，所述极柱盖设置于所述第二台阶槽。
根据本公开的一些实施例，所述盖板组件包括：盖板，所述盖板设置有多个所述第一极性连接部。
根据本公开的一些实施例，所述盖板形成有多个凹槽，多个所述凹槽的槽底构造为所述第一极性连接部；所述盖板组件还包括：极柱盖，所述盖板形成有围绕所述凹槽的第三台阶槽，所述极柱盖设置于所述第三台阶槽。
根据本公开的一些实施例，所述极柱盖与所述凹槽的槽底之间存在间隙。
根据本公开的一些实施例，所述间隙在第一方向上的尺寸为d,d满足关系式为：0.1mm≤d≤1mm。
根据本公开的一些实施例，在第二投影面上，多个所述第一极性连接部的正投影外轮廓关于所述盖板组件正投影外轮廓的中心对称分布，所述第二投影面垂直于第一方向。
根据本公开的一些实施例，所述第一极性连接部和所述第二极性连接部以焊接连接。
根据本公开的一些实施例，所述盖板组件包括注液孔和防爆阀，在第三投影面上，所述注液孔的正投影覆盖所述盖板组件正投影外轮廓的中心，或者防爆阀的正投影覆盖所述盖板组件正投影外轮廓的中心，所述第三投影面垂于第一方向。
根据本公开第二方面实施例的电池，包括：上述的电池端盖组件；还包括：电芯，所述电芯与所述集流盘连接；和壳体，所述电芯设置于所述壳体内，所述盖板组件设置于所述壳体的至少一端。
根据本公开第三方面实施例的用电设备，包括：上述的电池端盖组件或上述的电池。
与现有技术相比，该用电设备可以提高过流能力，增加导流效果，也可以提高电池的倍率性能，还可以避免穿透焊接漏液问题的发生，从而可以提高用电设备的安全性。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本公开实施例的电池的结构示意图；
图2是图1中区域A的放大图；
图3是根据本公开实施例的盖板组件设置防爆阀的结构示意图；
图4是根据本公开实施例的盖板组件设置注液孔的结构示意图；
图5是根据本公开实施例的盖板组件设置防爆阀的截面图；
图6是根据本公开实施例的盖板组件设置注液孔的截面图；
图7是根据本公开另一个实施例的电池的结构示意图；
图8是图7中区域B的放大图；
图9是根据本公开实施例的集流盘的结构示意图；
图10是根据本公开实施例的集流盘的剖视图；
图11是根据本公开实施例的用电设备的示意性框图；
图12是根据本公开实施例的用电设备的另一示意性框图。
附图标记：
100、电池；200、用电设备；
10、盖板组件；11、第一极性连接部；12、盖板；
13、极柱；131、第一极柱体；132、第二极柱体；133、连接筒；134、翻边；135、内孔；136、第一台阶槽；137、第
二台阶槽；
14、通孔；
20、集流盘；21、第二极性连接部；22、电芯连接部；
30、第一绝缘密封件；40、第二绝缘密封件；
50、极柱盖；60、凹槽；70、第三台阶槽；
80、注液孔；90、防爆阀；
91、电芯；92、极耳焊接面；93、壳体。
具体实施方式
下面详细描述本公开的实施例，参考附图描述的实施例是示例性的。
下面参考图1-图10描述根据本公开实施例的电池端盖组件。
参照图1和图2所示，本公开第一方面实施例的电池端盖组件，包括：盖板组件10和集流盘20，盖板组件10设置有多个间隔设置的第一极性连接部11，集流盘20设置有第二极性连接部21，多个第一极性连接部11均与第二极性连接部21电连接，从而可以使多个第一极性连接部11的电性相同。
具体地，传统的圆柱形电池的盖板一般设置有两个极柱，一个极柱与正极耳连接，另一个极柱与负极耳连接，与正极耳连接的极柱为正极柱，与负极耳连接的极柱为负极柱，圆柱电池的单侧采用一个正极柱和一个负极柱，这样电流传输通道较少，增加了电流在电池内部的阻力，导致圆柱形电池的极柱存在过流能力较弱的问题。
因此，需要对该电池100的结构进行优化，该电池100中的盖板组件10设置有多个间隔设置的第一极性连接部11，这样可以便于盖板组件10与集流盘20的第二极性连接部21进行电连接，多个第一极性连接部11的设置，可以避免盖板组件10与集流盘20的电连接发生短路，从而可以进一步提高盖板组件10与集流盘20电连接的稳定性。
进一步地，盖板组件10的第一极性连接部11和集流盘20的第二极性连接部21的设置，可以增加盖板组件10与集流盘20的接触面积和连接强度。
而且，多个第一极性连接部11均与第二极性连接部21电连接，从而可以使盖板组件10形成与多个第一极性连接部11一一对应的同性电极，也就是说，当集流盘20处，与电芯91连接的极耳为正极耳时，集流盘20的第二极性连接部21与正极耳电连接，这样可以使与第二极性连接部21连接的第一极性连接部11带正电，从而可以使盖板组件10形成与第一极性连接部11对应的正极。由于第一极性连接部11设置有多个，可以使盖板组件10对应多个第一极性连接部11形成多个正极。
同理，当集流盘20处，与电芯91连接的极耳为负极耳时，集流盘20的第二极性连接部21与负极耳电连接，这样可以使与第二极性连接部21连接的第一极性连接部11带负电，从而可以使盖板组件10形成与第一极性连接部11对应的负极。由于第一极性连接部11设置有多个，可以使盖板组件10对应多个第一极性连接部11形成多个负极。
如此，盖板组件10对应多个第一极性连接部11形成多个同性的电极，可以增加电流传输的通道，从而可以提高电池100的盖板组件10的过流能力。
由此，该电池100的盖板组件10形成与多个第一极性连接部11一一对应的同性电极，这样可以增加电流传输的通道，也可以减小电流在电池100内部的阻力，从而可以提高电池端盖组件的过流能力，增加导流效果，也可以提高电池100的倍率性能。
根据本公开的一些实施例，如图5所示，多个第一极性连接部11在第一方向上的正投影面积为S1，盖板组件10在第一方向上的正投影面积为S2，S1:S2＝(0.2-0.4):1，其中S1和S2以相同单位计。
其中，第一方向为第一极性连接部11的厚度方向，多个第一极性连接部11在第一方向正投影面积占盖板组件10正投影面积的20％-40％，从而可以提高第一极性连接部11的导流效果。
根据本公开的一些实施例，在第一投影面上，多个第一极性连接部11的正投影位于第二极性连接部21的正投影内，第一投影面垂直于第一方向。如此，可以使第一极性连接部11与第二极性连接部21进行充分的接触，从而可以进一步提高第一极性连接部11与第二极性连接部21电连接的稳定性。
根据本公开的具体实施例，第二极性连接部21在第一方向上的投影面积为S3，多个第一极性连接部11在第一方向上的投影面积为S4，S3:S4＝(0.8-1.5):1，其中S3和S4以相同单位计。
其中，第二极性连接部21在第一方向上的投影面积占多个第一极性连接部11在第一方向上的投影面积的80％-150％，如此，可以增加第二极性连接部21与多个第一极性连接部11的接触面积，从而可以提高第二极性连接部21与多个第一极性连接部11的导流效果。
根据本公开的一些实施例，第二极性连接部21在第一方向上的投影面积为S3，多个第一极性连接部11在第一方向上的投影面积为S4，S3:S4＝(1.01-1.3):1，其中S3和S4以相同单位计。
其中，第二极性连接部21在第一方向上的投影面积占多个第一极性连接部11在第一方向上的投影面积的101％-130％，如此，可以进一步增加第二极性连接部21与多个第一极性连接部11接触面积，从而可以进一步提高第二极性连接部21与多个第一极性连接部11的导流效果。
根据本公开的一些实施例，如图1和图2所示，第二极性连接部21为多个，多个第一极性连接部11与多个第二极性连接部21一一对应地连接。
其中，第二极性连接部21对应第一极性连接部11设置，多个第一极性连接部11与多个第二极性连接部21一一对应地连接，从而可以使多个第一极性连接部11与多个第二极性连接部21之间形成多个电流通道。
根据本公开的一些实施例，每个第二极性连接部21在第一方向上的投影面积均大于对应的第一极性连接部11在第一方向上的投影面积。如此，可以保证第一极性连接部11充分地与第二极性连接部21进行电连接，从而可以增加电流通道。
根据本公开的一些实施例，如图1和图9所示，集流盘20设置有电芯连接部22，电芯连接部22与多个第二极性连接部21在集流盘20的周向上间隔设置。
其中，集流盘20的电芯连接部22的设置，可以便于电芯连接部22与电芯91的连接，也可以增加电芯连接部22与电芯91的接触面积，可以使电芯连接部22与电芯91连接的更加稳定，从而可以提高集流盘20与电芯91电连接的稳定性。
还有，集流盘20上多个第二极性连接部21的设置，可以使集流盘20与第一极性连接部11的连接更加便捷和稳定，也可以提高集流盘20与盖板组件10之间电流的过流的能力。
根据本公开的一些实施例，如图9所示，电芯连接部22为多个，在集流盘20的周向上，相邻的两个第二极性连接部21之间设置有至少一个电芯连接部22。
其中，当集流盘20上的第二极性连接部21设置为两个时，两个第二极性连接部21相对间隔设置，两个第二极性连接部21之间设置有四个电芯连接部22，四个电芯连接部22均与电芯91连接，从而可以进一步保证电芯91与集流盘20电连接的稳定性。
根据本公开的具体实施例，第二极性连接部21构造为朝向邻近盖板组件10的方向凸出的第一凸起部，电芯连接部22构造为朝向远离盖板组件10的方向凸出的第二凸起部。
具体地，第二极性连接部21构造为朝向邻近盖板组件10的方向凸出的第一凸起部，第一凸起部采用冲压局部拉延成形或桥形成形，不仅在盖板组件10装配时，可以起到一定的缓冲作用，同时，由于第一凸起部与极耳间存在间隙，有利于电芯91注液时，电解液的快速浸润；而且，这样可以增加第二极性连接部21与盖板组件10连接的强度与刚度，也可以保证电芯91与盖板组件10之间的连接更加牢固可靠。第一凸起部可以给第二极性连接部21与盖板组件10的连接提供更大的接触面积，也可以增加第二极性连接部21与盖板组件10连接的稳定性，也可以减少松动，从而可以提高电池100的安全性。
另外，电芯连接部22构造为朝向远离盖板组件10的方向凸出的第二凸起部，第二凸起部可以给集流盘20与电芯91的连接提供更大的接触面积，也可以增加集流盘20与电芯91连接的稳定性，还可以减少松动。
根据本公开的一些实施例，第一凸起部的凸起高度为h1，第二凸起部的凸起高度为h2，h1:h2＝(2-60):1，其中，h1和h2以相同单位计。
其中，第一凸起部的凸起高度h1的范围设计为0.2mm-3.0mm,第二凸起部的凸起高度h2范围设计为0.05mm-0.4mm，h1/h2＝(2-60):1，h1用于合盖时缓冲吸收结构件公差，h2用于局部压实提升极耳焊接面92的贴合性。
根据本公开的一些实施例，如图9所示，电芯连接部22在集流盘20上呈扇形或长条形，和/或第二极性连接部21在集流盘20上呈梯形、矩形、扇形或长条形。
其中，电芯连接部22在集流盘20上呈扇形或者长条形设置，可以增加集流盘20的刚性，也有利于电芯连接部22与极耳焊接面92的接触。
同理，第二极性连接部21在集流盘20上呈梯形、矩形、扇形或长条形设置，可以进一步增加集流盘20的刚性，也可以使第二极性连接部21的受力更加均匀，还可以降低热量在第二极性连接部21的积聚。
根据本公开的一些实施例，如图3所示，盖板组件10包括：盖板12和多个极柱13，多个极柱13间隔地安装于盖板12，每个极柱13均设置有第一极性连接部11。
其中，盖板12可以设置两个极柱13，两个极柱13在盖板12上间隔设置，由于每个极柱13均设置有第一极性连接部11，第一极性连接部11与集流盘20连接，这样可以便于两个极柱13形成同性极柱13，从而可以提高盖板12处的过流能力。
根据本公开的一些实施例，如图2和图3所示，盖板12形成有通孔14，极柱13包括：第一极柱体131和第二极柱体132，第一极柱体131包括邻近集流盘20的第一侧和远离集流盘20的第二侧，而且第一极柱体131设置有第一极性连接部11，第二极柱体132与第一极柱体131的第二侧连接。
其中，盖板12设置有通孔14，可以便于极柱13穿设安装。而且，极柱13主要由第一极柱体131和第二极柱体132组成，第一极柱体131穿设通孔14，可以便于第一极柱体131与集流盘20的连接。
另外，第一极柱体131的一端位于盖板12的邻近集流盘20的一侧，第一极柱体131设置有第一极性连接部11，第一极柱体131通过第一极性连接部11与集流盘20连接，如此，可以提高第一极柱体131与集流盘20连接的稳定性。
进一步地，第二极柱体132位于盖板12的远离集流盘20的一侧，第二极柱体132与第一极柱体131的第二侧连接，如此，可以便于极柱13的安装，也可以减少热量对集流盘20的影响，还可以降低热量在第一极性连接部11与集流盘20连接区域的积聚。
根据本公开的具体实施例，如图5所示，第一极柱体131包括连接板、连接筒133和翻边134，连接板构造为第一极性连接部11，连接筒133的一端与连接板连接，而且连接筒133穿设通孔14，翻边134连接于连接筒133远离连接板的一端，翻边134与第二极柱体132连接。
具体地，第一极性连接部11为连接板，可以便于第一极柱体131与集流盘20的连接，也可以增大连接板与集流盘20的接触面积。
另外，连接筒133的设置，可以便于第一极柱体131与第二极柱体132的连接，而且，连接筒133的中部为中空结构，如此，可以便于从外部对连接板进行穿透焊接。
进一步地，翻边134的设置，可以增加第一极柱体131与第二极柱体132连接的强度，也可以提供更牢固的连接方式，还可以保证第一极柱体131与第二极柱体132连接的稳固性和可靠性，从而可以减少第一极柱体131与第二极柱体132的连接因松动而引起的故障风险。
根据本公开的一些实施例，如图5所示，第二极柱体132形成有内孔135和围绕内孔135设置的第一台阶槽136，连接筒133穿设内孔135，翻边134设置于第一台阶槽136。
其中，第二极柱体132形成有内孔135，内孔135的设置，可以便于连接筒133的穿设。第二极柱体132也设置有第一台阶槽136，翻边134与第一台阶槽136进行连接配合，从而可以增加翻边134与第一台阶槽136的接触面积，也可以增加翻边134与第一台阶槽136的连接强度。
根据本公开的一些实施例，如图5所示，盖板组件10还包括：第一绝缘密封件30和第二绝缘密封件40，第一绝缘密封件30抵接于盖板12和第二极柱体132之间，以及第一绝缘密封件30抵接于通孔14的内壁和连接筒133的外壁之间，第二绝缘密封件40抵接于连接板和盖板12之间，以及第二绝缘密封件40抵接于通孔14的内壁和连接筒133的外壁之间，第二绝缘密封件40与第一绝缘密封件30连接并位于第一绝缘密封件30的邻近集流盘20的一侧。
其中，第一极柱体131与第二极柱体132之间设置有第一绝缘密封件30和第二绝缘密封件40，第一绝缘密封件30抵接于盖板12和第二极柱体132之间，这样可以对盖板12和第二极柱体132之间进行绝缘和密封，从而可以防止第二极柱体132的电流流向盖板12。
进一步地，第一绝缘密封件30抵接于通孔14的内壁和连接筒133的外壁之间，如此，可以避免连接筒133的电流流向盖板12。
还有，第二绝缘密封件40抵接于连接板和盖板12之间，这样可以防止连接板和盖板12之间出现电解液，从而可以保证连接板和盖板12之间的密封性。
进一步地，第二绝缘密封件40抵接于通孔14的内壁和连接筒133的外壁之间，可以增加通孔14的内壁和连接筒133的外壁之间的密封性，从而可以防止电解液流向盖板12。而且，第二绝缘密封件40位于第一绝缘密封件30的邻近集流盘20的一侧，如此，可以进一步提高第一绝缘密封件30与集流盘20之间的密封性，从而可以保证电池100内部的安全性。
根据本公开的一些实施例，如图5所示，盖板组件10还包括极柱盖50，第二极柱体132在远离第一极柱体131的一侧形成有第二台阶槽137，极柱盖50设置于第二台阶槽137。
其中，极柱盖50的设置，可以进一步避免极柱13穿透焊接存在的焊洞漏液问题，极柱盖50可以进一步进行封堵，从而可以提高极柱13的可靠性。极柱13在焊接时，首先通过CCD相机识别对应焊接位置并合上极柱盖50后，在电芯91外部进行穿透焊接，从而可以简化电芯91焊接的难度。
进一步地，第二极柱体132形成有第二台阶槽137，可以便于极柱盖50嵌入至第二台阶槽137，从而可以使极柱盖50进一步起到封堵和密封的作用。而且，极柱盖50与第二台阶槽137的槽底压缩贴合，焊接后，再采用外部穿透焊接的方式进行连接导流。
根据本公开的一些实施例，极柱13呈环形、矩形、扇形、弧形或圆形。
其中，极柱13呈环形、矩形、扇形、弧形或圆形设置，可以更好地适配不同的场景需求，也可以改变极柱13处电流的分布情况。
根据本公开的另一个实施例，如图7和图8所示，盖板组件10包括盖板12，盖板12设置有多个第一极性连接部11。
其中，盖板12设置有多个第一极性连接部11，可以便于第一极性连接部11与集流盘20的连接，从而可以使盖板12与集流盘20连接的更加稳定。
根据本公开的具体实施例，如图7和图8所示，盖板12形成有多个凹槽60，多个凹槽60的槽底构造为第一极性连接部11，盖板组件10还包括：极柱盖50，盖板12形成有围绕凹槽60的第三台阶槽70，极柱盖50设置于第三台阶槽70。
具体地，盖板12开设有多个凹槽60，如此，可以使盖板12形成多个第一极性连接部11，从而可以便于盖板12通过第一极性连接部11与集流盘20进行连接。
还有，极柱盖50嵌入至第三台阶槽70，从而可以使极柱盖50进一步起到封堵和密封的作用。
根据本公开的一些实施例，极柱盖50与凹槽60的槽底之间存在间隙。如此，可以防止凹槽60处焊疤凸出顶住极柱盖50，也可以保证极柱盖50装配位置的一致性。
根据本公开的具体实施例，间隙在第一方向上的尺寸为d，d满足关系式为：0.1mm≤d≤1mm。
其中，间隙在0.1mm-1.0mm范围内，从而可以防止凹槽60处焊疤凸出顶住极柱盖50，也可以保证极柱盖50装配位置的一致性。
根据本公开的一些实施例，第一极性连接部11和第二极性连接部21以焊接连接。如此，可以使第一极性连接部11和第二极性连接部21连接的更加稳定与牢固。
根据本公开的一些实施例，在第二投影面上，多个第一极性连接部11的正投影外轮廓关于盖板组件10正投影外轮廓的中心对称分布，第二投影面垂直于第一方向。如此，不仅可以增加盖板组件10处的过流能力，也可以使盖板组件10处的电流更加均匀。
根据本公开的一些实施例，如图3和图4所示，盖板组件10包括注液孔80和防爆阀90，在第三投影面上，注液孔80的正投影覆盖盖板组件10正投影外轮廓的中心，或者防爆阀90的正投影覆盖盖板组件10正投影外轮廓的中心，第三投影面垂直于第一方向。
其中，当在电芯91内部压力过大的情况下，将防爆阀90打开泄压，从而可以防止出现电池100爆炸的现象，防爆阀90可以呈环形、矩形或者圆形，可以根据实际情况进行设置。
进一步地，防爆阀90与电芯91的卷针孔相对设置，而且防爆阀90与电芯91的卷针孔在同一中心轴线，当电池100内部短路起火时，可以比偏置的防爆阀90更有利于气体的排除，从而可以提高电池100的安全性。
还有，注液孔80位于盖板组件10的中心，从而可以简化电池100注液的定位难度。
其中，电芯91与集流盘20连接，可以便于电流的传递，电芯91位于壳体93内，壳体93对电芯91起到保护作用，盖板组件10可以设置在壳体93的两端，从而可以便于电芯91内部形成电流流路。
根据本公开第二方面实施例的电池100，包括：上述实施例的端盖组件、电芯91和壳体93，电芯91与集流盘20连接，电芯91设置于壳体93内，盖板组件10设置于壳体93的至少一端。
其中，该电池100中的盖板组件10可以适用钢壳圆柱电池，也可以适用矩形电池。
根据本公开第三方面实施例的用电设备200，包括：上述第一方面任一实施例的端盖组件(如图11所示)或者上述第二方面任一实施例的电池100(如图12所示)。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。
尽管已经示出和描述了本公开的实施例，本领域的普通技术人员可以理解：在不脱离本公开的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本公开的范围由权利要求及其等同物限定。

Claims (26)

  1. 一种电池端盖组件，其特征在于，包括：
    盖板组件(10)，所述盖板组件(10)设置有多个间隔设置的第一极性连接部(11)；和
    集流盘(20)，所述集流盘(20)设置有第二极性连接部(21)，多个所述第一极性连接部(11)均与所述第二极性连接部(21)电连接，以使多个所述第一极性连接部(11)的电性相同。
  2. 根据权利要求1所述的电池端盖组件，其特征在于，多个所述第一极性连接部(11)在第一方向上的正投影面积为S1，所述盖板组件(10)在第一方向上的正投影面积为S2，S1:S2＝(0.2-0.4):1，其中S1和S2以相同单位计。
  3. 根据权利要求1或2所述的电池端盖组件，其特征在于，在第一投影面上，多个所述第一极性连接部(11)的正投影位于所述第二极性连接部(21)的正投影内，所述第一投影面垂直于第一方向。
  4. 根据权利要求1-3中任一项所述的电池端盖组件，其特征在于，所述第二极性连接部(21)在第一方向上的投影面积为S3，多个所述第一极性连接部(11)在第一方向上的投影面积为S4，S3:S4＝(0.8-1.5):1，其中S3和S4以相同单位计。
  5. 根据权利要求1-4中任一项所述的电池端盖组件，其特征在于，所述第二极性连接部(21)在第一方向上的投影面积为S3，多个所述第一极性连接部(11)在第一方向上的投影面积为S4，S3:S4＝(1.01-1.3):1，其中S3和S4以相同单位计。
  6. 根据权利要求1-5中任一项所述的电池端盖组件，其特征在于，所述第二极性连接部(21)为多个，多个所述第一极性连接部(11)与多个所述第二极性连接部(21)对应连接。
  7. 根据权利要求6所述的电池端盖组件，其特征在于，每个所述第二极性连接部(21)在第一方向上的投影面积均大于对应的所述第一极性连接部(11)在第一方向上的投影面积。
  8. 根据权利要求1-7中任一项所述的电池端盖组件，其特征在于，所述集流盘(20)设置有电芯连接部(22)，所述电芯连接部(22)与所述第二极性连接部(21)间隔设置。
  9. 根据权利要求8所述的电池端盖组件，其特征在于，所述电芯连接部(22)为多个，在所述集流盘(20)的周向上，相邻的两个所述第二极性连接部(21)之间设置有至少一个所述电芯连接部(22)。
  10. 根据权利要求8或9所述的电池端盖组件，其特征在于，所述第二极性连接部(21)构造为朝向邻近所述盖板组件(10)的方向凸出的第一凸起部，所述电芯连接部(22)构造为朝向远离所述盖板组件(10)的方向凸出的第二凸起部。
  11. 根据权利要求10所述的电池端盖组件，其特征在于，所述第一凸起部的凸起高度为h1，所述第二凸起部的凸起高度为h2，h1:h2＝(2-60):1，其中，h1和h2以相同单位计。
  12. 根据权利要求1-11中任一项所述的电池端盖组件，其特征在于，所述盖板组件(10)包括：
    盖板(12)；和
    多个极柱(13)，多个所述极柱(13)间隔地安装于所述盖板(12)，每个所述极柱(13)均设置有所述第一极性连接部(11)。
  13. 根据权利要求12所述的电池端盖组件，其特征在于，所述盖板(12)形成有通孔(14)；
    所述极柱(13)包括：
    第一极柱体(131)，所述第一极柱体(131)穿设所述通孔(14)，所述第一极柱体(131)包括邻近所述集流盘(20)的第一侧和远离所述集流盘(20)的第二侧，所述第一侧设置有所述第一极性连接部(11)；和
    第二极柱体(132)，所述第二极柱体(132)与所述第一极柱体(131)的第二侧连接。
  14. 根据权利要求13所述的电池端盖组件，其特征在于，所述第一极柱体(131)包括：
    连接板，所述连接板构造为所述第一极性连接部(11)；
    连接筒(133)，所述连接筒(133)的一端与所述连接板连接且穿设所述通孔(14)；和
    翻边(134)，所述翻边(134)连接于所述连接筒(133)远离所述连接板的一端，所述翻边(134)与所述第二极柱体(132)连接。
  15. 根据权利要求14所述的电池端盖组件，其特征在于，所述第二极柱体(132)形成有内孔(135)和围绕所述内孔(135)设置的第一台阶槽(136)，所述连接筒(133)穿设所述内孔(135)，所述翻边(134)设置于所述第一台阶槽(136)。
  16. 根据权利要求14或15所述的电池端盖组件，其特征在于，所述盖板组件(10)还包括：
    第一绝缘密封件(30)，所述第一绝缘密封件(30)设置于所述盖板(12)和所述第二极柱体(132)之间以及设置于所述通孔(14)的内壁和所述连接筒(133)的外壁之间；和
    第二绝缘密封件(40)，所述第二绝缘密封件(40)设置于所述连接板和所述盖板(12)之间以及设置于所述通孔(14)的内壁和所述连接筒(133)的外壁之间，所述第二绝缘密封件(40)与所述第一绝缘密封件(30)连接并位于所述第一绝缘密封件(30)邻近所述集流盘(20)的一侧。
  17. 根据权利要求13-16中任一项所述的电池端盖组件，其特征在于，所述盖板组件(10)还包括：
    极柱盖(50)，所述第二极柱体(132)在远离所述第一极柱体(131)的一侧形成有第二台阶槽(137)，所述极柱盖(50)设置于所述第二台阶槽(137)。
  18. 根据权利要求1所述的电池端盖组件，其特征在于，所述盖板组件(10)包括：
    盖板(12)，所述盖板(12)设置有多个所述第一极性连接部(11)。
  19. 根据权利要求18所述的电池端盖组件，其特征在于，所述盖板(12)形成有多个凹槽(60)，多个所述凹槽(60)的槽底构造为所述第一极性连接部(11)；
    所述盖板组件(10)还包括：
    极柱盖(50)，所述盖板(12)形成有围绕所述凹槽(60)的第三台阶槽(70)，所述极柱盖(50)设置于所述第三台阶槽(70)。
  20. 根据权利要求19所述的电池端盖组件，其特征在于，所述极柱盖(50)与所述凹槽(60)的槽底之间存在间隙。
  21. 根据权利要求20所述的电池端盖组件，其特征在于，所述间隙在第一方向上的尺寸为d,d满足关系式为：0.1mm≤d≤1mm。
  22. 根据权利要求1-21中任一项所述的电池端盖组件，其特征在于，在第二投影面上，多个所述第一极性连接部(11)的正投影外轮廓关于所述盖板组件(10)正投影外轮廓的中心对称分布，所述第二投影面垂直于第一方向。
  23. 根据权利要求1-22中任一项所述的电池端盖组件，其特征在于，所述第一极性连接部(11)和所述第二极性连接部(21)以焊接连接。
  24. 根据权利要求1-23中任一项所述的电池端盖组件，其特征在于，所述盖板组件(10)包括注液孔(80)和防爆阀(90)，在第三投影面上，所述注液孔(80)的正投影覆盖所述盖板组件(10)正投影外轮廓的中心，或者防爆阀(90)的正投影覆盖所述盖板组件(10)正投影外轮廓的中心，所述第三投影面垂于第一方向。
  25. 一种电池(100)，其特征在于，包括：
    权利要求1-24中所述的电池端盖组件；
    电芯(91)，所述电芯(91)与所述集流盘(20)连接；和
    壳体(93)，所述电芯(91)设置于所述壳体(93)内，所述盖板组件(10)设置于所述壳体(93)的至少一端。
  26. 一种用电设备(200)，其特征在于，包括：权利要求1-24中所述的电池端盖组件或权利要求25所述的电池(100)。
PCT/CN2025/112109 2024-08-02 2025-08-01 电池端盖组件、电池和用电设备 Pending WO2026026945A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202411052990.3 2024-08-02
CN202411052990.3A CN118589155A (zh) 2024-08-02 2024-08-02 电池端盖组件、电池和用电设备

Publications (1)

Publication Number Publication Date
WO2026026945A1 true WO2026026945A1 (zh) 2026-02-05

Family

ID=92533671

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2025/112109 Pending WO2026026945A1 (zh) 2024-08-02 2025-08-01 电池端盖组件、电池和用电设备

Country Status (2)

Country Link
CN (1) CN118589155A (zh)
WO (1) WO2026026945A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118589155A (zh) * 2024-08-02 2024-09-03 比亚迪股份有限公司 电池端盖组件、电池和用电设备
CN120073235A (zh) * 2025-04-25 2025-05-30 深圳海辰储能科技有限公司 储能装置及用电设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215911486U (zh) * 2021-09-29 2022-02-25 蜂巢能源科技有限公司 电池的顶盖以及电池
CN220021533U (zh) * 2023-03-13 2023-11-14 江苏正力新能电池技术有限公司 一种二次电池及用电装置
CN220569779U (zh) * 2023-07-18 2024-03-08 宁德时代新能源科技股份有限公司 一种电池单体、电池包及用电装置
CN220821851U (zh) * 2023-09-20 2024-04-19 浙江吉利控股集团有限公司 一种电池及汽车
CN118589155A (zh) * 2024-08-02 2024-09-03 比亚迪股份有限公司 电池端盖组件、电池和用电设备

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN218242175U (zh) * 2022-07-11 2023-01-06 欣旺达电动汽车电池有限公司 圆柱电池及电池包
CN115377623B (zh) * 2022-09-21 2023-10-17 厦门海辰储能科技股份有限公司 集流件、电池、电池包和用电设备
CN218919232U (zh) * 2022-09-21 2023-04-25 中创新航科技股份有限公司 电池
CN219498109U (zh) * 2023-02-27 2023-08-08 远景动力技术(江苏)有限公司 一种电芯和包含该电芯的用电装置
CN219998443U (zh) * 2023-05-29 2023-11-10 格力钛新能源股份有限公司 负极转接结构及锂离子电池
CN116404280B (zh) * 2023-06-05 2023-08-29 厦门海辰储能科技股份有限公司 储能装置及用电设备
CN221328040U (zh) * 2023-08-25 2024-07-12 欣旺达动力科技股份有限公司 二次电池及电池包
CN117219972B (zh) * 2023-11-06 2024-01-30 深圳海辰储能科技有限公司 集流盘、储能装置及用电设备
CN117855565B (zh) * 2024-03-05 2024-05-03 厦门海辰储能科技股份有限公司 储能装置及用电设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215911486U (zh) * 2021-09-29 2022-02-25 蜂巢能源科技有限公司 电池的顶盖以及电池
CN220021533U (zh) * 2023-03-13 2023-11-14 江苏正力新能电池技术有限公司 一种二次电池及用电装置
CN220569779U (zh) * 2023-07-18 2024-03-08 宁德时代新能源科技股份有限公司 一种电池单体、电池包及用电装置
CN220821851U (zh) * 2023-09-20 2024-04-19 浙江吉利控股集团有限公司 一种电池及汽车
CN118589155A (zh) * 2024-08-02 2024-09-03 比亚迪股份有限公司 电池端盖组件、电池和用电设备

Also Published As

Publication number Publication date
CN118589155A (zh) 2024-09-03

Similar Documents

Publication Publication Date Title
US20260081270A1 (en) Secondary battery and top cover component thereof
CN110880566B (zh) 电池
KR100467703B1 (ko) 캡 조립체 및 이를 채용한 이차전지
CN209658246U (zh) 顶盖组件及二次电池
CN107658395A (zh) 一种锂离子电池
CN118589155A (zh) 电池端盖组件、电池和用电设备
CN217589185U (zh) 一种电池盖板组件及圆柱电池
KR20130033077A (ko) 이차 전지
CN218242175U (zh) 圆柱电池及电池包
CN217589363U (zh) 顶盖组件及电池
WO2023236533A1 (zh) 单体电池与电池包
WO2026077240A1 (zh) 圆柱电池盖板组件及电池
CN116742287A (zh) 圆柱电池结构
CN222883808U (zh) 一种电池的顶盖及电池
CN221614143U (zh) 动力电池极柱、极柱总成结构、电池外壳及电池
EP2736099A1 (en) Rechargeable battery
CN209658242U (zh) 二次电池及其顶盖组件
CN220291025U (zh) 圆柱电池结构
CN219843057U (zh) 用于电池的盖板组件、电池、电池模组、电池包和车辆
CN118523018A (zh) 一种电池单体及用电装置
CN219717208U (zh) 电池
CN118919966A (zh) 盖板组件、电芯及电池包
CN118507941A (zh) 电池、电池系统和用电设备
WO2024175092A1 (zh) 圆柱电池、电池包和用电设备
CN222927725U (zh) 一种电池的顶盖及电池

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: 25847396

Country of ref document: EP

Kind code of ref document: A1