WO2024216786A1 - 电池、电池模组以及用电设备 - Google Patents

电池、电池模组以及用电设备 Download PDF

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Publication number
WO2024216786A1
WO2024216786A1 PCT/CN2023/111297 CN2023111297W WO2024216786A1 WO 2024216786 A1 WO2024216786 A1 WO 2024216786A1 CN 2023111297 W CN2023111297 W CN 2023111297W WO 2024216786 A1 WO2024216786 A1 WO 2024216786A1
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WO
WIPO (PCT)
Prior art keywords
battery
cover plate
pole
current collecting
shell
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.)
Ceased
Application number
PCT/CN2023/111297
Other languages
English (en)
French (fr)
Inventor
闵昌飞
李尚益
黄利明
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.)
Eve Power Co Ltd
Original Assignee
Eve Power 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 Eve Power Co Ltd filed Critical Eve Power Co Ltd
Priority to DE212023000165.9U priority Critical patent/DE212023000165U1/de
Publication of WO2024216786A1 publication Critical patent/WO2024216786A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • 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 battery technology, and in particular to a battery, a battery module and an electrical device.
  • Lithium battery technology is increasingly used in 3C consumer electronics, power batteries, energy storage and other energy fields. It can be divided into three categories based on the packaging shell: stainless steel cylindrical batteries, aluminum or stainless steel square batteries, and soft-pack batteries.
  • stainless steel cylindrical batteries are made of a combination of stainless steel and caps.
  • the caps include sealing rings, thermistors, exhaust valves and other components. The above components are often stacked.
  • stainless steel batteries have a more compact structure, which makes space utilization higher than soft-pack batteries, further improving the energy density of the battery.
  • the sealing test of the battery is an indispensable process.
  • the helium test method is generally used to test the sealing of the battery.
  • the cylindrical battery is mainly sealed by rolling groove sealing. After the closed structural cover is closed, it is impossible to fill a small amount of helium into the battery.
  • a specific instrument is required to infiltrate helium from the outside of the battery, and then a helium test is performed. It often takes more than 4 hours and the process is cumbersome, which is not conducive to batch sealing test of batteries.
  • the embodiments of the present application provide a battery, a battery module and an electrical device to solve or at least partially solve the deficiencies of the above-mentioned background technology.
  • the present application provides a battery, comprising:
  • a housing comprising a first port and a receiving cavity
  • a core package located in the accommodating cavity
  • a cover plate assembly used for sealing the first port of the shell, the cover plate assembly comprises a pole, a cover plate and a pole through hole opened on the cover plate, the pole is arranged in the pole through hole, the pole is provided with an opening and a liquid injection hole which are connected to each other, the opening is located on a side of the liquid injection hole away from the core package, the aperture of the opening is larger than the aperture of the liquid injection hole, the cover plate extends from the pole to the direction close to the shell, and the cover plate is welded to the side wall of the shell;
  • a sealing portion wherein the sealing portion includes a first sealing sub-portion and a second sealing sub-portion, wherein the second sealing sub-portion is located on a side of the first sealing sub-portion away from the injection hole, the first sealing sub-portion is used to seal the injection hole, the first sealing sub-portion extends from the opening toward the injection hole, and the first sealing sub-portion is spaced apart from the side wall of the opening, and the second sealing sub-portion is used to seal the opening.
  • the present application also provides a battery module, which includes the above-mentioned battery.
  • the present application also provides an electrical device, which includes the above-mentioned battery module.
  • the embodiments of the present application provide a battery, a battery module and an electrical device, wherein the battery comprises a shell, a core pack, a cover assembly and a sealing portion, wherein the shell comprises a first port and a receiving cavity, the core pack is located in the receiving cavity, the cover assembly is used to seal the first port of the shell, the cover assembly comprises a pole, a cover and a pole through hole opened on the cover, the pole is arranged in the pole through hole, an opening and a liquid injection hole which are mutually conductive are provided on the pole, the opening is located on a side of the liquid injection hole away from the core pack, and the aperture of the opening is larger than the aperture of the liquid injection hole
  • the cover plate extends from the pole toward the direction close to the shell, and the cover plate is welded to the side wall of the shell, the sealing part includes a first sealing sub-part and a second sealing sub-part, the second sealing sub-part is located on the side of the first sealing sub-part away from
  • FIG1 is a schematic diagram of the structure of a battery provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a cross-sectional structure of a battery provided in an embodiment of the present application.
  • FIG3 is an exploded view of a cover plate assembly provided in an embodiment of the present application.
  • FIG4 is a schematic cross-sectional view of a cover plate assembly provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of the cross-sectional structure of point A in FIG1 ;
  • FIG6 is a schematic diagram of the cross-sectional structure at B in FIG1 ;
  • FIG7 is a schematic structural diagram of a first current collecting plate provided in an embodiment of the present application.
  • FIG8 is a schematic structural diagram of a second current collecting plate provided in an embodiment of the present application.
  • FIG9 is a top view of a battery provided in an embodiment of the present application.
  • FIG10 is a schematic cross-sectional view of a battery provided in an embodiment of the present application.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.
  • a first feature being “above” or “below” a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact.
  • a first feature being “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below” and “below” a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
  • This embodiment provides a battery, a battery module and an electrical device.
  • the following are detailed descriptions of each. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.
  • the battery 1 includes a shell 10 , a core pack 20 , a cover plate assembly 30 and a sealing portion 60 .
  • the housing 10 includes a first port 11 and a receiving chamber 12 .
  • the core package 20 is located in the accommodating cavity 12 .
  • the cover plate assembly 30 is used to seal the first port 11 of the shell 10.
  • the cover plate assembly 30 includes a pole 40, a cover plate 31, and a pole through hole 31C opened on the cover plate 31.
  • the pole 40 is arranged in the pole through hole 31C.
  • the pole 40 is provided with an opening 40A and an injection hole 40B that are connected to each other.
  • the opening 40A is located on the side of the injection hole 40B away from the core package 20.
  • the aperture of the opening 40A is larger than the aperture of the injection hole 40B.
  • the cover plate 31 extends from the pole 40 to the direction close to the shell 10, and the cover plate 31 is welded to the side wall of the shell 10.
  • the sealing portion 60 includes a first sealing sub-portion 61 and a second sealing sub-portion 62.
  • the second sealing sub-portion 62 is located on a side of the first sealing sub-portion 61 away from the injection hole 40B.
  • the first sealing sub-portion 61 is used to seal the injection hole 40B.
  • the first sealing sub-portion 61 extends from the opening 40A in a direction close to the injection hole 40B, and the first sealing sub-portion 61 is spaced apart from the side wall of the opening 40A.
  • the second sealing sub-portion 62 is used to seal the opening 40A.
  • the sealing test of the battery is an indispensable step.
  • the helium test method is generally used to test the sealing of the battery.
  • cylindrical batteries are mainly sealed in the form of rolling groove sealing. After the closed structural cover is closed, it is impossible to fill a small amount of helium into the battery.
  • a specific instrument is required to infiltrate helium from the outside of the battery, and then a helium test is performed. This often takes more than 4 hours and the process is cumbersome, which is not conducive to batch battery sealing testing.
  • the cover plate assembly 30 includes a pole 40, a cover plate 31, and a pole through hole 31C opened on the cover plate 31.
  • the pole 40 is arranged in the pole through hole 31C.
  • the pole 40 is provided with an opening 40A and a liquid injection hole 40B that are mutually conductive.
  • the opening 40A is located on the side of the liquid injection hole 40B away from the core package 20.
  • the aperture of the opening 40A is larger than the aperture of the liquid injection hole 40B.
  • the cover plate 31 is formed by the The pole 40 extends in a direction close to the shell 10, and the cover plate 31 is welded to the side wall of the shell 10.
  • the sealing portion 60 includes a first sealing sub-portion 61 and a second sealing sub-portion 62.
  • the first sealing sub-portion 61 is used to seal the injection hole 40B, and the second sealing sub-portion 62 is used to seal the opening 40A, so that helium can be flushed into the interior of the battery 1 through the opening 40A and the injection hole 40B for sealing detection, thereby saving manpower.
  • Figure 1 is a schematic diagram of the structure of a battery provided in an embodiment of the present application
  • Figure 2 is a schematic diagram of the cross-sectional structure of a battery provided in an embodiment of the present application
  • Figure 3 is an exploded view of a cover assembly provided in an embodiment of the present application
  • Figure 4 is a schematic diagram of the cross-section of a cover assembly provided in an embodiment of the present application
  • Figure 5 is a schematic diagram of the cross-sectional structure at point A in Figure 1
  • Figure 6 is a schematic diagram of the cross-sectional structure at point B in Figure 1.
  • the core package 20 includes a main body (not marked in the figure), and a first pole ear 21A and a second pole ear (not marked in the figure) located on opposite sides of the main body, the first pole ear 21A and the second pole ear are both connected to the main body, wherein the first port 11 is arranged close to the second pole ear; specifically, the first pole ear 21A is arranged away from the first port 11, and the second pole ear is arranged close to the first port 11.
  • the cover plate 31 includes a cover plate body 31A, an inclined portion 31D and a welding portion 31B, the inclined portion 31D is located between the cover plate body 31A and the welding portion 31B; the extension direction of the inclined portion 31D is at a preset angle with the extension direction of the cover plate body 31A, and the extension direction of the welding portion 31B is parallel to the extension direction of the cover plate body 31A; the welding portion 31B overlaps the side wall of the shell 10, and the welding portion 31B is fixed to the side wall of the shell 10 by welding.
  • the cover plate 31 also includes an isolating member 32, and the isolating member 32 is located on a side of the cover plate body 31A close to the core package 20, and the isolating member 32 is concentrically formed with the cover plate body 31A, and the diameter of the isolating member 32 is smaller than the diameter of the cover plate body 31A, so that a step surface is formed on the cover plate 31, and the step surface is the welding portion 31B; wherein, the isolating member 32 is an insulating member injection molded on the cover plate 31, or the isolating member 32 is a metal plate welded on the cover plate body 31A, and the present embodiment does not impose any specific restrictions on this.
  • the isolating member 32 is fixed to the cover plate body 31A by welding; wherein, when the isolating member 32 is an insulating member injection-molded on the cover plate 31, the isolating member 32 can be used as an insulating member, so that the cover plate 31 and the core package 20 are insulated; when the isolating member 32 is a metal plate, the isolating member 32 and the cover plate body 31A are fixed by welding.
  • the battery 1 also includes an insulating gasket (not shown in the figure), which is arranged between the isolating member 32 and the core package 20, so that the cover plate 31 and the core package 20 are insulated; at the same time, the provision of the insulating gasket can also prevent the shell 10 and the cover plate 31 from being squeezed when the shell 10 and the cover plate 31 are welded, thereby causing metal chips to fall into the interior of the battery 1 and affect the stability of the core package 20.
  • an insulating gasket (not shown in the figure), which is arranged between the isolating member 32 and the core package 20, so that the cover plate 31 and the core package 20 are insulated; at the same time, the provision of the insulating gasket can also prevent the shell 10 and the cover plate 31 from being squeezed when the shell 10 and the cover plate 31 are welded, thereby causing metal chips to fall into the interior of the battery 1 and affect the stability of the core package 20.
  • the cover plate 31 in this embodiment includes the cover plate body 31A and the isolation member 32, the isolation member 32 is located on the side of the cover plate body 31A close to the core package 20, the isolation member 32 is concentrically formed with the cover plate body 31A, and the diameter of the isolation member 32 is smaller than the diameter of the cover plate body 31A, so that a step surface is formed on the cover plate 31, and the step surface is the welding portion 31B, and the step surface can accommodate the thickness of the shell 10, thereby forming a positioning fit.
  • the welding portion 31B includes a guide surface 31B1; specifically, the guide surface 31B1 is located on the side of the welding portion 31B close to the shell 10; it can be understood that in this embodiment, the cover plate 31 includes a cover plate body 31A and the welding portion 31B, the welding portion 31B is formed by the cover plate body 31A extending in the direction close to the shell 10, and the side of the welding portion 31B close to the shell 10 is overlapped with the side wall of the shell 10, and the radial positioning of the cover plate 31 before welding is achieved by the welding portion 31B, and the welding portion 31B is provided.
  • the welding portion 31B includes a guide surface 31B1, which is located on a side of the welding portion 31B close to the shell 10.
  • the guide surface 31B1 can play a guiding role when the cover plate 31 is assembled with the shell 10, thereby facilitating the installation of the cover plate 31 and saving costs.
  • the side of the welding portion 31B close to the shell 10 is connected to the side wall of the shell 10 in an overlapping manner, and the welding portion 31B is fixed to the side wall of the shell 10 by welding, thereby improving the assembly accuracy of the cover plate 31, and its loading and unloading operations are simple and the stability is high.
  • the thickness of the cover plate body 31A is greater than or equal to 0.2 mm and less than or equal to 0.8 mm; the extension direction of the cover plate body 31A and the extension direction of the welding portion 31B form a preset angle ⁇ , and the preset angle ⁇ is greater than or equal to 90 degrees and less than or equal to 135 degrees; further, in this embodiment, the thickness of the cover plate 31 is greater than the thickness of the shell 10, thereby improving the strength of the cover plate 31 and increasing the stability of the structure, thereby avoiding the occurrence of fractures at the welding point between the shell 10 and the cover plate 31 when the pressure bearing capacity of the cover plate 31 is not as good as the pressure bearing capacity of the side wall of the shell 10.
  • the center line W2 of the pole through hole 31C coincides with the center line W1 of the first port 11; further, the pole 40 is provided with an opening 40A and an injection hole 40B, the opening 40A is located on the side of the injection hole 40B away from the core package 20, the aperture of the opening 40A is larger than the aperture of the injection hole 40B, wherein the center line W2 of the pole through hole 31C coincides with the center line W3 of the opening 40A, and the center line W3 of the opening 40A coincides with the center line W4 of the injection hole 40B.
  • the aperture d1 of the injection hole 40B is greater than or equal to 2 mm and less than or equal to 4 mm; the aperture d2 of the opening 40A is greater than or equal to 6 mm and less than or equal to 10 mm; the width d3 of the pole 40 is greater than or equal to 16 mm and less than or equal to 20 mm; the depth h1 of the opening 40A is greater than or equal to 2.5 mm and less than or equal to 4 mm.
  • battery formation is the first charge and discharge cycle of the battery after the battery is manufactured, the purpose of which is to activate the active material in the battery and generate an SEI film at the anode.
  • Some gas will be generated during the formation process, and in the related art, cylindrical batteries are mainly sealed in the form of rolling groove sealing.
  • the cover plate is usually a closed structure, which makes it impossible to remove the gas generated during the battery formation process, thereby causing the shell structure to deform and bulge; it can be understood that in this embodiment, an opening 40A and an injection hole 40B are provided on the pole 40, wherein the center line W2 of the pole through hole 31C coincides with the center line W3 of the opening 40A, and the center line W3 of the opening 40A coincides with the center line W4 of the injection hole 40B, so that the gas generated during the battery formation process can be released through the opening 40A and the injection hole 40B, thereby avoiding the deformation and swelling of the shell 10.
  • the pole 40 includes a slot 40C, the slot 40C is located on a side of the pole 40 close to the cover plate 31 , the cover plate body 31A is located in the slot 40C, and the slot 40C is fixedly connected to the cover plate 31 via a sealing ring 50 .
  • the sealing ring 50 includes a first sealing sub-ring 51 and a second sealing sub-ring 52, the first sealing sub-ring 51 is located on the side of the cover plate body 31A away from the core package 20, the second sealing sub-ring 52 is located on the side of the cover plate body 31A close to the core package 20, and the second sealing sub-ring 52 is provided with a riveted pressure ring 53 on the side away from the cover plate 31, and the riveted pressure ring 53 is arranged around the pole 40; it can be understood that this embodiment is fixedly connected to the cover plate 31 through the sealing ring 50 by setting the groove 40C, the sealing ring 50 includes a first sealing sub-ring 51 and a second sealing sub-ring 52, the second sealing sub-ring 52 is provided with a riveted pressure ring 53 on the side away from the cover plate 31, and the riveted pressure ring 53 is arranged around the pole 40, which can achieve the effect of significantly improving the air tightness of the battery 1.
  • a side of the first sealing sub-portion 61 away from the injection hole 40B is flush with a side of the pole 40 away from the core package 20, and the second sealing sub-portion 62 is at least partially located in the opening 40A, and the second sealing sub-portion 62 extends from the opening 40A toward the direction close to the injection hole 40B;
  • the first sealing sub-portion 61 includes but is not limited to rice flour granules
  • the second sealing sub-portion 62 includes but is not limited to sealing nails
  • the second sealing sub-portion 62 is welded and fixed to the inside of the opening 40A.
  • the welding portion 31B is connected to the side wall of the shell 10 in an overlapping manner by setting the side close to the shell 10, and the welding portion 31B is fixed to the side wall of the shell 10 by welding, the groove 40C is fixedly connected to the cover plate 31 by the sealing ring 50, the first sealing sub-portion 61 is used to seal the injection hole 40B, and the second sealing sub-portion 62 is used to seal the opening 40A, thereby realizing the fully sealed structure of the battery 1.
  • Figures 2, 6, 7 and 8 are schematic diagram of the structure of the first current collecting disk provided in an embodiment of the present application;
  • Figure 8 is a schematic diagram of the structure of the second current collecting disk provided in an embodiment of the present application;
  • the battery 1 also includes a first current collecting disk 71 and a second current collecting disk 72, the first current collecting disk 71 is located between the core package 20 and the cover plate 31, and the second current collecting disk 72 is located on the side of the accommodating cavity 12 away from the first port 11; wherein the first current collecting disk 71 is provided with a first through hole 71A, and the center line W5 of the first through hole 71A coincides with the center line W4 of the injection hole 40B.
  • the first current collecting plate 71 is located between the first pole lug 21A and the pole 40, the two sides of the first current collecting plate 71 are in contact with the first pole lug 21A and the pole 40 respectively, the pole 40 is electrically connected to the first pole lug 21A through the first current collecting plate 71, and the second current collecting plate 72 is located between the second pole lug and the bottom of the shell 10, and the bottom of the shell 10 is arranged opposite to the first port 11; preferably, the shape of the first current collecting plate 71 and the shape of the second current collecting plate 72 both include but are not limited to flat disc-shaped structures, wherein the first through-hole 71A is arranged at the center of the first current collecting plate 71.
  • a first protrusion 71B is provided on a side of the first current collecting plate 71 close to the pole 40, and the center of the first protrusion 71B coincides with the center of the circle of the first current collecting plate 71, and the first current collecting plate 71 is welded and fixed to the pole 40 by the first protrusion 71B, wherein the height of the first protrusion 71B is greater than or equal to 0.1 mm and less than or equal to 0.5 mm; specifically, a plurality of first guide grooves 71C are provided on a side of the first current collecting plate 71 away from the core package 20, and the plurality of first guide grooves 71C are arranged around the center of the circle of the first current collecting plate 71; a plurality of second guide grooves 72A are provided on a side of the second current collecting plate 72 close to the core package 20, and the plurality of second guide grooves 72A are arranged around the center of the circle of the second current collecting plate 72.
  • a plurality of the first guide grooves 71C are arranged around the center of the first current collecting plate 71, and the first guide grooves 71C can guide the electrolyte on the outside of the core package 20 to the first perforation 71A, and cooperate with the opening 40A and the injection hole 40B on the pole 40, so that the electrolyte can flow more smoothly, and thus the electrolyte can better infiltrate into the core package 20; at the same time, a first protrusion 71B is provided on the side of the first current collecting plate 71 close to the pole 40, and the center of the first protrusion 71B coincides with the center of the first current collecting plate 71, so as to facilitate the welding of the pole 40 and the first current collector after the cover plate 31 is closed.
  • the core package 20 is a lithium-ion core package
  • the first pole ear 21A is a positive pole ear
  • the second pole ear is a negative pole ear
  • the first current collecting plate 71 is a positive current collecting plate
  • the second current collecting plate 72 is a negative current collecting plate
  • the pole 40 is a positive pole.
  • the battery 1 further includes a protective tape 80, wherein the protective tape 80 is located between the first current collecting disk 71 and the pole 40, and the protective tape 80 includes a protective tape main body 81 and a connecting portion 82, wherein both sides of the protective tape main body 81 are in contact with the first current collecting disk 71 and the pole 40 respectively, and the connecting portion 82 is formed by extending the protective tape main body 81 toward the direction close to the shell 10, and the connecting portion 82 is arranged between the shell 10 and the core package 20, and the connecting portion 82 is bonded to a side of the core package 20 close to the shell 10; specifically, the orthographic projection of the protective tape main body 81 on the core package 20 covers the orthographic projection of the first current collecting disk 71 on the core package 20, and the connecting portion 82 at least covers the first pole ear 21A after bending.
  • the orthographic projection of the protective tape body 81 on the core package 20 covers the orthographic projection of the first current collecting plate 71 on the core package 20, and the connecting portion 82 at least covers the first pole ear 21A after bending, which can effectively prevent the first current collecting plate 71 and the first pole ear 21A from contacting the inner shell 10 and causing short circuit or leakage, thereby effectively improving the yield rate of the battery 1.
  • Figure 9 is a top view of the battery provided in the embodiment of the present application
  • Figure 10 is a partial cross-sectional schematic diagram of the battery provided in the embodiment of the present application.
  • the bottom of the shell 10 includes a first surface 101 and a second surface 102 that are relatively arranged, the first surface 101 is located in the accommodating cavity 12, and the second surface 102 is located outside the accommodating cavity 12; a reinforcing rib structure 10A is provided at the bottom of the shell 10, and the reinforcing rib structure 10A is formed by one of the first surface 101 and the second surface 102 protruding toward the other of the first surface 101 and the second surface 102; it can be understood that this embodiment improves the strength of the shell 10 by providing the reinforcing rib structure 10A at the bottom of the shell 10, thereby making the shell 10 less likely to deform or break, thereby improving the service life of the battery 1.
  • the bottom of the shell 10 includes an explosion-proof notch 10B, and the explosion-proof notch 10B is arranged around the center line of the shell 10; specifically, the explosion-proof notch 10B is arranged as a full circle structure, and the depth of the explosion-proof notch 10B is greater than or equal to 0.05 mm and less than or equal to 0.12 mm; it should be noted that, in this embodiment, the number of circles of the explosion-proof notch 10B can be set according to actual needs. In addition, in this embodiment, the explosion-proof notch 10B is arranged as a full circle structure only for illustrative purposes.
  • cylindrical lithium-ion batteries generally need to go through processes such as grooving, laser welding, and mechanical sealing to achieve a sealing effect.
  • the above method requires a special form of cap as an explosion-proof valve structure, which reduces the internal space utilization rate of the battery cell; it can be understood that this embodiment, by setting the bottom of the shell 10 to include an explosion-proof notch 10B, can safely release pressure when the internal pressure of the battery 1 is too high.
  • this embodiment omits the explosion-proof valve structure and saves battery space. Therefore, when multiple batteries 1 are connected through a busbar, the contact area between the battery terminal and the connecting row is increased, thereby increasing the high-power charging and discharging and safety performance of the battery 1.
  • This embodiment provides a battery module, which includes the battery 1 described in any of the above embodiments.
  • the battery module can be applied to electrical equipment in various fields such as automobiles, aircraft, and mechanical production equipment to provide electrical energy for the electrical equipment, and has strong practicality.
  • the present embodiment provides an electrical device, which includes the battery module described in any of the above embodiments, and the battery module is used as a power supply for the electrical device. Therefore, the electrical device also has the advantages of the above battery module, which helps to simplify the overall structure of the electrical device; wherein the electrical device may be a car, an aircraft, a mechanical production equipment, etc.

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Abstract

一种电池、电池模组以及用电设备，该电池（1）包括壳体（10）、芯包（20）、盖板组件（30）以及密封部（60），盖板组件（30）包括极柱（40）、盖板（31）以及开设于盖板（31）上的极柱通孔（31C），极柱（40）设置于极柱通孔（31C）内，极柱（40）上设有相互导通的开孔（40A）和注液孔（40B），通过开孔（40A）和注液孔（40B）将氦气冲入电池的内部进行密封性检测，进而节省人力。

Description

电池、电池模组以及用电设备 技术领域
本申请涉及电池技术领域，特别是涉及一种一种电池、电池模组以及用电设备。
 背景技术
锂电池技术在3C消费电子、动力电池、储能等能源领域应用越来越广泛，以包装外壳为标准可以分为三类，不锈钢圆柱电池、铝或不锈钢方形电池、软包电池，其中，不锈钢圆柱电池由不锈钢和盖帽组合加工而成，盖帽包括密封圈、热敏电阻、排气阀等元件，上述元件往往是堆叠设置，相比于软包电池，不锈钢电池结构更加紧凑，使得空间利用率较软包更高，进一步提升电池的能量密度。
目前，在电池生产工艺中，对电池进行密封性检测是必不可少的一道工序，目前，一般采用氦检法对电池的密封性进行检测，在相关技术中，圆柱电池主要采用滚槽封口的形式进行密封，封闭状的结构盖板合盖后，无法在所述电池内部充入微量氦气，导致后续所述电池氦检密封性时，需使用特定仪器从电池外部渗入氦气，然后再氦检，往往耗时4小时以上，过程繁琐，不利于电池批量密封性检测。
 发明概述
本申请的实施例提供了一种电池、电池模组以及用电设备，用以解决或至少部分解决上述背景技术存在的不足。
本申请提供一种电池，包括：
壳体，包括第一端口和容纳腔；
芯包，位于所述容纳腔内；
盖板组件，用于密封所述壳体的第一端口，所述盖板组件包括极柱、盖板以及开设于所述盖板上的极柱通孔，所述极柱设置于所述极柱通孔内，所述极柱上设有相互导通的开孔和注液孔，所述开孔位于所述注液孔远离所述芯包的一侧，所述开孔的孔径大于所述注液孔的孔径，所述盖板由所述极柱向靠近所述壳体的方向延伸，且所述盖板与所述壳体的侧壁焊接固；
密封部，所述密封部包括第一密封子部和第二密封子部，所述第二密封子部位于所述第一密封子部远离所述注液孔的一侧，所述第一密封子部用于密封所述注液孔，所述第一密封子部由所述开孔向靠近所述注液孔的方向延伸，且所述第一密封子部与所述开孔的侧壁间隔设置，所述第二密封子部用于密封所述开孔。
本申请还提供了一种电池模组，所述电池模组包括上述的电池。
本申请还提供一种用电设备，所述用电设备包括上述的电池模组。
本申请实施例的有益效果：本申请实施例提供一种电池、电池模组以及用电设备，该电池包括壳体、芯包、盖板组件以及密封部，壳体包括第一端口和容纳腔，芯包位于容纳腔内，盖板组件用于密封壳体的第一端口，盖板组件包括极柱、盖板以及开设于盖板上的极柱通孔，极柱设置于极柱通孔内，极柱上设有相互导通的开孔和注液孔，开孔位于注液孔远离芯包的一侧，开孔的孔径大于注液孔的孔径，盖板由极柱向靠近壳体的方向延伸，且盖板与壳体的侧壁焊接固，密封部包括第一密封子部和第二密封子部，第二密封子部位于第一密封子部远离注液孔的一侧，第一密封子部用于密封注液孔，第一密封子部由开孔向靠近注液孔的方向延伸，且第一密封子部与开孔的侧壁间隔设置，第二密封子部用于密封开孔，从而可以通过开孔和注液孔将氦气冲入电池的内部进行密封性检测，进而节省人力。
 附图说明
图1为本申请实施例所提供的电池的结构示意图；
图2为本申请实施例所提供的电池的剖面结构示意图；
图3为本申请实施例所提供的盖板组件的爆炸图；
图4为本申请实施例所提供的盖板组件的剖面结构示意图；
图5为图1中A处的剖面结构示意图；
图6为图1中B处的剖面结构示意图；
图7为本申请实施例所提供得第一集流盘的结构示意图；
图8为本申请实施例所提供得第二集流盘的结构示意图；
图9为本申请实施例所提供的电池的俯视图；
图10为本申请实施例所提供的电池的截面示意图。
 本发明的实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，可以是机械连接，也可以是电连接，可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请的描述中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一特征和第二特征直接接触，也可以包括第一特征和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
本实施例提供一种电池、电池模组以及用电设备。以下分别进行详细说明。需说明的是，以下实施例的描述顺序不作为对实施例优选顺序的限定。
请结合图1~图10，本申请公开了一种电池1、电池模组以及用电设备，所述电池1包括壳体10、芯包20、盖板组件30以及密封部60。
所述壳体10包括第一端口11和容纳腔12。
所述芯包20位于所述容纳腔12内。
所述盖板组件30用于密封所述壳体10的第一端口11，所述盖板组件30包括极柱40、盖板31以及开设于所述盖板31上的极柱通孔31C，所述极柱40设置于所述极柱通孔31C内，所述极柱40上设有相互导通的开孔40A和注液孔40B，所述开孔40A位于所述注液孔40B远离所述芯包20的一侧，所述开孔40A的孔径大于所述注液孔40B的孔径，所述盖板31由所述极柱40向靠近所述壳体10的方向延伸，且所述盖板31与所述壳体10的侧壁焊接固。
所述密封部60包括第一密封子部61和第二密封子部62，所述第二密封子部62位于所述第一密封子部61远离所述注液孔40B的一侧，所述第一密封子部61用于密封所述注液孔40B，所述第一密封子部61由所述开孔40A向靠近所述注液孔40B的方向延伸，且所述第一密封子部61与所述开孔40A的侧壁间隔设置，所述第二密封子部62用于密封所述开孔40A。
需要说明的是，在相关技术中，在电池生产工艺中，对电池进行密封性检测是必不可少的一道工序，目前，一般采用氦检法对电池的密封性进行检测，在相关技术中，圆柱电池主要采用滚槽封口的形式进行密封，封闭状的结构盖板合盖后，无法在所述电池内部充入微量氦气，导致后续所述电池氦检密封性时，需使用特定仪器从电池外部渗入氦气，然后再氦检，往往耗时4h以上，过程繁琐，不利于电池批量密封性检测。
可以理解的是，本实施例设置所述盖板组件30包括极柱40、盖板31以及开设于所述盖板31上的极柱通孔31C，所述极柱40设置于所述极柱通孔31C内，所述极柱40上设有相互导通的开孔40A和注液孔40B，所述开孔40A位于所述注液孔40B远离所述芯包20的一侧，所述开孔40A的孔径大于所述注液孔40B的孔径，所述盖板31由所述极柱40向靠近所述壳体10的方向延伸，且所述盖板31与所述壳体10的侧壁焊接固，所述密封部60包括第一密封子部61和第二密封子部62，所述第一密封子部61用于密封所述注液孔40B，所述第二密封子部62用于密封所述开孔40A，从而可以通过所述开孔40A和所述注液孔40B将氦气冲入所述电池1的内部进行密封性检测，进而节省人力。
在一实施例中，请结合图1、图2、图3、图4、图5和图6；其中，图1为本申请实施例所提供的电池的结构示意图；图2为本申请实施例所提供的电池的剖面结构示意图；图3为本申请实施例所提供的盖板组件的爆炸图；图4为本申请实施例所提供的盖板组件的截面示意图；图5为图1中A处的剖面结构示意图；图6为图1中B处的剖面结构示意图。
在本实施例中，所述芯包20包括主体部（图中未标记）、及位于所述主体部相对两侧的第一极耳21A和第二极耳（图中未标记），所述第一极耳21A与所述第二极耳均与所述主体部连接，其中，所述第一端口11靠近所述第二极耳设置；具体地，所述第一极耳21A远离所述第一端口11设置，所述第二极耳靠近所述第一端口11设置。
在本实施例中，所述盖板31包括盖板主体31A、倾斜部31D以及焊接部31B，所述倾斜部31D位于所述盖板主体31A和所述焊接部31B之间；所述倾斜部31D的延伸方向与所述盖板主体31A的延伸方向呈一预设夹角，所述焊接部31B的延伸方向与所述盖板主体31A的延伸方向平行；所述焊接部31B与所述壳体10的侧壁搭接，且所述焊接部31B与所述壳体10的侧壁之间通过焊接固定。
进一步地，在本实施例中，所述盖板31还包括隔离件32，所述隔离件32位于所述盖板主体31A靠近所述芯包20的一侧，所述隔离件32与所述盖板主体31A同心成型，且所述隔离件32的直径小于所述盖板主体31A的直径，以使所述盖板31上形成台阶面，所述台阶面为所述焊接部31B；其中，所述隔离件32为注塑在盖板31上的绝缘件，或者所述隔离件32为焊接在所述盖板主体31A上的金属板，本实施例对此不做具体限制。
具体地，所述隔离件32与所述盖板主体31A之间通过焊接固定；其中，当所述隔离件32为注塑在盖板31上的绝缘件时，所述隔离件32可以作为绝缘件，从而使所述盖板31与所述芯包20绝缘设置；当所述隔离件32为金属板时，所述隔离件32与所述盖板主体31A之间通过焊接固定，此时，所述电池1还包括绝缘垫片（图中未画出），所述绝缘垫片设置于所述隔离件32与所述芯包20之间，从而使所述盖板31与所述芯包20绝缘设置；同时，设置所述绝缘垫片还能避免当所述壳体10与所述盖板31进行焊接时，所述壳体10与所述盖板31发生挤压，从而产生金属屑掉进到电池1内部，影响到芯包20的稳定性的现象。
可以理解的是，本实施例设置所述盖板31包括所述盖板主体31A和所述隔离件32，所述隔离件32位于所述盖板主体31A靠近所述芯包20的一侧，所述隔离件32与所述盖板主体31A同心成型，且所述隔离件32的直径小于所述盖板主体31A的直径，以使所述盖板31上形成台阶面，所述台阶面为所述焊接部31B，所述台阶面可以容纳所述壳体10的厚度，从而形成定位配合。
在本实施例中，所述焊接部31B包括导向面31B1；具体地，所述导向面31B1位于所述焊接部31B靠近所述壳体10的一侧；可以理解的是，本实施例设置所述盖板31包括盖板主体31A和所述焊接部31B，所述焊接部31B由所述盖板主体31A向靠近所述壳体10的方向延伸形成，所述焊接部31B靠近所述壳体10的一侧与所述壳体10的侧壁搭接设置，通过所述焊接部31B实现对所述盖板31焊接前的径向定位，通过设置所述焊接部31B包括导向面31B1，所述导向面31B1位于所述焊接部31B靠近所述壳体10的一侧，所述导向面31B1可以在所述盖板31与所述壳体10装配时起到导向作用，从而使所述盖板31安装方便，节省成本；同时，所述焊接部31B靠近所述壳体10的一侧与所述壳体10的侧壁间采用搭接形式连接，且所述焊接部31B与所述壳体10的侧壁之间通过焊接固定，从而提高了所述盖板31的装配精度，其装卸操作简单，稳定性高。
需要说明的是，所述盖板主体31A的厚度大于或等于0.2毫米，且小于或等于0.8毫米；所述盖板主体31A的延伸方向与所述焊接部31B的延伸方向呈一预设夹角α，所述预设夹角α大于或等于90度，且小于或等于135度；进一步地，在本实施例中，所述盖板31的厚度大于所述壳体10的厚度，从而提升所述盖板31的强度，增加了结构的稳定性，进而避免当所述盖板31的承压能力不如所述壳体10侧壁的承压能力时，所述壳体10与所述盖板31的焊接处发生断裂。
在本实施例中，所述极柱通孔31C的中心线W2与所述第一端口11的中心线W1重合；进一步地，所述极柱40上设有开孔40A和注液孔40B，所述开孔40A位于所述注液孔40B远离所述芯包20的一侧，所述开孔40A的孔径大于所述注液孔40B的孔径，其中，所述极柱通孔31C的中心线W2与所述开孔40A的中心线W3重合，所述开孔40A的中心线W3与所述注液孔40B的中心线W4重合。
其中，所述注液孔40B的孔径d1大于或等于2毫米，且小于或等于4毫米；所述开孔40A的孔径d2大于或等于6毫米，且小于或等于10毫米；所述极柱40的宽度d3大于或等于16毫米，且小于或等于20毫米；所述开孔40A的深度h1大于或等于2.5毫米，且小于或等于4毫米。
需要说明的是，电池化成是电池制造完成后，首次对电池进行充放电循环的过程，目的是激活电池中的活性物质，并在阳极生成SEI膜，在化成的过程中会产生一些气体，而在相关技术中，圆柱电池主要采用滚槽封口的形式进行密封，上述方法中盖板通常为封闭状结构，从而导致电池化成的过程中产生的气体无法排除，进而造成壳体结构形变鼓胀；可以理解的是，本实施例通过设置所述极柱40上设有开孔40A和注液孔40B，其中，所述极柱通孔31C的中心线W2与所述开孔40A的中心线W3重合，所述开孔40A的中心线W3与所述注液孔40B的中心线W4重合，从而可以通过所述开孔40A和所述注液孔40B将电池化成过程中产生气体释放出去，进而避免所述壳体10发生形变鼓胀。
进一步地，在本实施例中，所述极柱40包括一开槽40C，所述开槽40C位于所述极柱40靠近所述盖板31的一侧，所述盖板主体31A位于所述开槽40C内，且所述开槽40C通过密封圈50与所述盖板31固定连接。
具体地，所述密封圈50包括第一密封子圈51和第二密封子圈52，所述第一密封子圈51位于所述盖板主体31A远离所述芯包20的一侧，所述第二密封子圈52位于所述盖板主体31A靠近所述芯包20的一侧，所述第二密封子圈52远离所述盖板31的一侧设置有铆接压环53，所述铆接压环53环绕所述极柱40设置；可以理解的是，本实施例通过设置所述开槽40C通过密封圈50与所述盖板31固定连接，所述密封圈50包括第一密封子圈51和第二密封子圈52，所述第二密封子圈52远离所述盖板31的一侧设置有铆接压环53，所述铆接压环53环绕所述极柱40设置，可达到明显改善所述电池1气密性的效果。
进一步地，在本实施例中，所述第一密封子部61远离所述注液孔40B的一侧与所述极柱40远离所述芯包20的一侧齐平，所述第二密封子部62至少部分位于所述开孔40A内，所述第二密封子部62由所述开孔40A向靠近所述注液孔40B的方向延伸；需要说明的是，在本实施例中，所述第一密封子部61包括但不限于米粉胶粒，所述第二密封子部62包括但不限于密封钉，所述第二密封子部62与所述开孔40A内部焊接固定。
可以理解的是，本实施例通过设置所述焊接部31B靠近所述壳体10的一侧与所述壳体10的侧壁间采用搭接形式连接，且所述焊接部31B与所述壳体10的侧壁之间通过焊接固定，所述开槽40C通过密封圈50与所述盖板31固定连接，所述第一密封子部61用于密封所述注液孔40B，所述第二密封子部62用于密封所述开孔40A，从而实现所述电池1的全密封结构。
进一步地，请结合图2、图6、图7和图8；其中，图7为本申请实施例所提供得第一集流盘的结构示意图；图8为本申请实施例所提供得第二集流盘的结构示意图；在本实施例中，所述电池1还包括第一集流盘71和第二集流盘72，所述第一集流盘71位于所述芯包20和所述盖板31之间，所述第二集流盘72位于所述容纳腔12远离所述第一端口11的一侧；其中，所述第一集流盘71开设有第一穿孔71A，所述第一穿孔71A的中心线W5与所述注液孔40B的中心线W4重合。
具体地，所述第一集流盘71位于所述第一极耳21A与所述极柱40之间，所述第一集流盘71的两侧分别与所述第一极耳21A和所述极柱40相接触，所述极柱40通过所述第一集流盘71与所述第一极耳21A电连接，所述第二集流盘72位于所述第二极耳和所述壳体10的底部之间，所述壳体10的底部与所述第一端口11相对设置；优选地，所述第一集流盘71的形状和所述第二集流盘72的形状均包括但不限于扁平状的圆盘形结构，其中，所述第一集流盘71的圆心设置有所述第一穿孔71A。
进一步地，在本实施例中，所述第一集流盘71靠近所述极柱40的一侧设置第一凸起71B，所述第一凸起71B的中心与所述第一集流盘71的圆心重合，所述第一集流盘71通过所述第一凸起71B与所述极柱40焊接固定，其中，所述第一凸起71B的高度大于或等于0.1毫米，且小于或等于0.5毫米；具体地，所述第一集流盘71远离所述芯包20的一侧设有多个第一导流槽71C，多个所述第一导流槽71C围绕所述第一集流盘71的圆心设置；所述第二集流盘72靠近所述芯包20的一侧设有多个第二导流槽72A，多个所述第二导流槽72A围绕所述第二集流盘72的圆心设置。
可以理解的是，多个所述第一导流槽71C围绕所述第一集流盘71的圆心设置，所述第一导流槽71C能够使所述芯包20外侧的电解液导向所述第一穿孔71A处，配合所述极柱40上的所述开孔40A和所述注液孔40B，使得电解液能够流通更通畅，进而使电解液能够更好的浸润到所述芯包20内；同时，所述第一集流盘71靠近所述极柱40的一侧设置第一凸起71B，所述第一凸起71B的中心与所述第一集流盘71的圆心重合，从而便于所述盖板31合盖后，所述极柱40与所述第一集流体的焊接。
需要说明的是，本实施例以所述芯包20为锂离子芯包、所述第一极耳21A为正极极耳、所述第二极耳为负极极耳、所述第一集流盘71为正极集流盘，所述第二集流盘72为负极集流盘、所述极柱40为正极柱为例对本申请的技术方案进行举例说明。
进一步地，在本实施例中，所述电池1还包括保护胶纸80，所述保护胶纸80位于所述第一集流盘71和所述极柱40之间，所述保护胶纸80包括保护胶纸主体81和连接部82，所述保护胶纸主体81的两侧分别与所述第一集流盘71和所述极柱40相接触，所述连接部82由所述保护胶纸主体81朝靠近所述壳体10的方向延伸形成，所述连接部82设置于所述壳体10和所述芯包20之间，所述连接部82与所述芯包20靠近所述壳体10的一侧粘结；具体地，所述保护胶纸主体81在所述芯包20上的正投影覆盖所述第一集流盘71在所述芯包20上的正投影，所述连接部82至少覆盖弯折后的所述第一极耳21A。
可以理解的是，本实施例通过设置，所述保护胶纸主体81在所述芯包20上的正投影覆盖所述第一集流盘71在所述芯包20上的正投影，所述连接部82至少覆盖弯折后的所述第一极耳21A，能有效防止所述第一集流盘71和所述第一极耳21A接触到内壳体10，引发短路或者漏电的现象发生，有效的提高了所述电池1良品率。
进一步地，请结合图1、图9和图10；其中，图9为本申请实施例所提供的电池的俯视图；图10为本申请实施例所提供的电池的局部截面示意图。
在本实施例中，所述壳体10的底部包括相对设置的第一表面101和第二表面102，所述第一表面101位于所述容纳腔12内，所述第二表面102位于所述容纳腔12外；所述壳体10的底部设置有加强筋结构10A，所述加强筋结构10A由所述第一表面101和所述第二表面102中的其中一个朝向所述第一表面101和所述第二表面102中的另一个的方向凸出形成；可以理解的是，本实施例通过在所述壳体10的底部设置有所述加强筋结构10A，从而提高了所述壳体10的强度，进而使所述壳体10不易出现变成或断裂的问题，提升所述电池1的使用寿命。
进一步地，所述壳体10的底部包括防爆刻痕10B，所述防爆刻痕10B环绕所述壳体10的中心线设置；具体地，所述防爆刻痕10B设置为整圈结构，所述防爆刻痕10B的深度大于或等于0.05毫米，且小于或等于0.12毫米；需要说明的是，本实施例对所述防爆刻痕10B的圈数可以根据实际需要进行设定，另外，在本实施例中，所述防爆刻痕10B设置为整圈结构仅用于举例说明。
需要说明的是，在相关技术中，圆柱型锂离子电池一般需要经过滚槽、激光焊、机械封口等工序以达到密封的效果，上述方法需要特殊形式的盖帽作为防爆阀结构，降低了所述电芯内部空间利用率；可以理解的是，本实施例通过设置所述壳体10的底部包括防爆刻痕10B，可以在所述电池1内部压力过高时，进行安全泄压，同时，本实施例相对于相关技术来说，省去了防爆阀结构，节约电池空间，从而当多个所述电池1通过连接片（busbar）连接时，增加了电池端子与连接排的接触面积，进而增加了所述电池1的大功率充放电及安全性能。
本实施例提供一种电池模组，所述电池模组包括上述任一实施例中所述的电池1。
可以理解的是，所述电池1已经在上述实施例中进行了详细的说明，在此不再重复说明。
在本实施例中，所述电池模组可应用于汽车、飞行器、机械生产设备等多个领域的用电设备中，用于为用电设备提供电能，具有较强的实用性。
本实施例提供一种用电设备，所述用电设备包括上述任一实施例中所述的电池模组，所述电池模组用于作为用电设备的供电电源，因此，所述用电设备也具备上述电池模组的各项优点，从而有助于简化用电设备的整体结构；其中，所述用电设备可以是汽车、飞行器、机械生产设备等。

Claims (22)

  1. 一种电池（1），包括：
    壳体（10），包括第一端口（11）和容纳腔（12）；
    芯包（20），位于所述容纳腔（12）内；
    盖板组件（30），用于密封所述壳体（10）的第一端口（11），所述盖板组件（30）包括极柱（40）、盖板（31）以及开设于所述盖板（31）上的极柱通孔（31C），所述极柱（40）设置于所述极柱通孔（31C）内，所述极柱（40）上设有相互导通的开孔（40A）和注液孔（40B），所述开孔（40A）位于所述注液孔（40B）远离所述芯包（20）的一侧，所述开孔（40A）的孔径大于所述注液孔（40B）的孔径，所述盖板（31）由所述极柱（40）向靠近所述壳体（10）的方向延伸，且所述盖板（31）与所述壳体（10）的侧壁焊接固；
    密封部（60），所述密封部（60）包括第一密封子部（61）和第二密封子部（62），所述第二密封子部（62）位于所述第一密封子部（61）远离所述注液孔（40B）的一侧，所述第一密封子部（61）用于密封所述注液孔（40B），所述第一密封子部（61）由所述开孔（40A）向靠近所述注液孔（40B）的方向延伸，且所述第一密封子部（61）与所述开孔（40A）的侧壁间隔设置，所述第二密封子部（62）用于密封所述开孔（40A）。
  2. 根据权利要求1所述的电池（1），其中，所述极柱通孔（31C）的中心线与所述第一端口（11）的中心线重合，所述极柱通孔（31C）的中心线与所述开孔（40A）的中心线重合，所述开孔（40A）的中心线与所述注液孔（40B）的中心线重合。
  3. 根据权利要求1所述的电池（1），其中，所述注液孔（40B）的孔径大于或等于2毫米，且小于或等于4毫米；所述开孔（40A）的孔径大于或等于6毫米，且小于或等于10毫米；所述极柱（40）的宽度大于或等于16毫米，且小于或等于20毫米；所述开孔（40A）的深度大于或等于2.5毫米，且小于或等于4毫米。
  4. 根据权利要求1所述的电池（1），其中，所述第一密封子部（61）包括米粉胶粒，所述第二密封子部（62）包括密封钉。
  5. 根据权利要求1所述的电池（1），其中，所述极柱（40）包括一开槽（40C），所述开槽（40C）位于所述极柱（40）靠近所述盖板（31）的一侧，所述盖板（31）位于所述开槽（40C）内，且所述开槽（40C）通过密封圈（50）与所述盖板（31）固定连接。
  6. 根据权利要求5所述的电池（1），其中，所述密封圈（50）包括第一密封子圈（51）和第二密封子圈（52），所述第一密封子圈（51）位于所述盖板主体（31A）远离所述芯包（20）的一侧，所述第二密封子圈（52）位于所述盖板（31）靠近所述芯包（20）的一侧，所述第二密封子圈（52）远离所述盖板（31）的一侧设置有铆接压环（53），所述铆接压环（53）环绕所述极柱（40）设置。
  7. 根据权利要求1所述的电池（1），其中，所述电池（1）还包括第一集流盘（71）和第二集流盘（72），所述第一集流盘（71）位于所述芯包（20）和所述盖板（31）之间，所述第二集流盘（72）位于所述容纳腔（12）远离所述第一端口（11）的一侧，所述第一集流盘（71）开设有第一穿孔（71A），所述第一穿孔（71A）的中心线与所述注液孔（40B）的中心线重合。
  8. 根据权利要求7所述的电池（1），其中，所述第一集流盘（71）的形状和所述第二集流盘（72）的形状均为扁平状的圆盘形结构，所述第一集流盘（71）的圆心设置有所述第一穿孔（71A）。
  9. 根据权利要求8所述的电池（1），其中，所述第一集流盘（71）靠近所述极柱（40）的一侧设置第一凸起（71B），所述第一凸起（71B）的中心与所述第一集流盘（71）的圆心重合，所述第一集流盘（71）通过所述第一凸起（71B）与所述极柱（40）焊接固定。
  10. 根据权利要求9所述的电池（1），其中，所述第一凸起（71B）的高度大于或等于0.1毫米，且小于或等于0.5毫米。
  11. 根据权利要求9所述的电池（1），其中，所述第一集流盘（71）远离所述芯包（20）的一侧设有多个第一导流槽（71C），多个所述第一导流槽（71C）围绕所述第一集流盘（71）的圆心设置；所述第二集流盘（72）靠近所述芯包（20）的一侧设有多个第二导流槽（72A），多个所述第二导流槽（72A）围绕所述第二集流盘（72）的圆心设置。
  12. 根据权利要求7所述的电池（1），其中，所述电池（1）还包括保护胶纸（80），所述保护胶纸（80）位于所述第一集流盘（71）和所述极柱（40）之间，所述保护胶纸（80）包括保护胶纸主体（81）和连接部（82），所述保护胶纸主体（81）的两侧分别与所述第一集流盘（71）和所述极柱（40）相接触，所述连接部（82）由所述保护胶纸主体（81）朝靠近所述壳体（10）的方向延伸形成，所述连接部（82）设置于所述壳体（10）和所述芯包（20）之间，所述连接部（82）与所述芯包（20）靠近所述壳体（10）的一侧粘结。
  13. 根据权利要求12所述的电池（1），其中，所述保护胶纸主体（81）在所述芯包（20）上的正投影覆盖所述第一集流盘（71）在所述芯包（20）上的正投影，所述连接部（82）至少覆盖弯折后的所述芯包（20）的第一极耳（21A）。
  14. 根据权利要求1所述的电池（1），其中，所述壳体（10）的底部包括相对设置的第一表面（101）和第二表面（102），所述第一表面（101）位于所述容纳腔（12）内，所述第二表面（102）位于所述容纳腔（12）外；所述壳体（10）的底部设置有加强筋结构（10A），所述加强筋结构（10A）由所述第一表面（101）和所述第二表面（102）中的其中一个朝向所述第一表面（101）和所述第二表面（102）中的另一个的方向凸出形成。
  15. 根据权利要求14所述的电池（1），其中，所述壳体（10）的底部包括防爆刻痕（10B），所述防爆刻痕（10B）环绕所述壳体（10）的中心线设置。
  16. 根据权利要求15所述的电池（1），其中，所述防爆刻痕（10B）的深度大于或等于0.05毫米，且小于或等于0.12毫米。
  17. 根据权利要求1所述的电池（1），其中，所述盖板（31）包括盖板主体（31A）、倾斜部（31D）以及焊接部（31B），所述倾斜部（31D）位于所述盖板主体（31A）和所述焊接部（31B）之间；
    所述倾斜部（31D）的延伸方向与所述盖板主体（31A）的延伸方向呈一预设夹角，所述焊接部（31B）的延伸方向与所述盖板主体（31A）的延伸方向平行；
    所述焊接部（31B）与所述壳体（10）的侧壁搭接，且所述焊接部（31B）与所述壳体（10）的侧壁之间通过焊接固定。
  18. 根据权利要求17所述的电池（1），其中，所述盖板（31）还包括隔离件（32），所述隔离件（32）位于所述盖板主体（31A）靠近所述芯包（20）的一侧，所述隔离件（32）与所述盖板主体（31A）同心成型，且所述隔离件（32）的直径小于所述盖板主体（31A）的直径。
  19. 根据权利要求18所述的电池（1），其中，所述隔离件（32）为注塑在盖板（31）上的绝缘件，或者所述隔离件（32）为焊接在所述盖板主体（31A）上的金属板。
  20. 根据权利要求18所述的电池（1），其中，所述盖板主体（31A）的厚度大于或等于0.2毫米，且小于或等于0.8毫米；所述预设夹角大于或等于90度，且小于或等于135度。
  21. 一种电池模组，包括如权利要求1-20中任一项所述的电池（1）。
  22. 一种用电设备，包括如权利要求21所述的电池模组。
PCT/CN2023/111297 2023-04-19 2023-08-04 电池、电池模组以及用电设备 Ceased WO2024216786A1 (zh)

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