WO2024198597A1 - 端盖组件、储能装置及用电设备 - Google Patents

端盖组件、储能装置及用电设备 Download PDF

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Publication number
WO2024198597A1
WO2024198597A1 PCT/CN2024/070158 CN2024070158W WO2024198597A1 WO 2024198597 A1 WO2024198597 A1 WO 2024198597A1 CN 2024070158 W CN2024070158 W CN 2024070158W WO 2024198597 A1 WO2024198597 A1 WO 2024198597A1
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WO
WIPO (PCT)
Prior art keywords
hole
area
energy storage
liquid injection
holes
Prior art date
Application number
PCT/CN2024/070158
Other languages
English (en)
French (fr)
Inventor
熊永锋
Original Assignee
厦门海辰储能科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 厦门海辰储能科技股份有限公司 filed Critical 厦门海辰储能科技股份有限公司
Publication of WO2024198597A1 publication Critical patent/WO2024198597A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of energy storage devices, and in particular to an end cover assembly, an energy storage device and an electrical equipment.
  • Secondary batteries are also called rechargeable batteries or storage batteries. They are batteries that can be recharged to activate the active materials after discharge and continue to be used. The recyclable nature of secondary batteries has made them gradually become the main power source for electrical equipment. As the demand for secondary batteries gradually increases, people's requirements for their performance in various aspects are also getting higher and higher, especially the requirements for the cycle performance and safety performance of secondary batteries.
  • Secondary batteries such as cylindrical lithium-ion batteries, are composed of an end cap assembly, an electrode assembly, and a cylindrical shell.
  • the end cap assembly includes a positive end cap and a negative end cap located at both ends of the cylindrical shell, respectively.
  • the positive end cap and the negative end cap are welded and sealed with the cylindrical shell from both ends.
  • the bare aluminum sheet of the positive end cap, the cylindrical shell, and the bare aluminum sheet of the negative end cap are conductive and positively charged after welding and sealing, while the negative metal adapter at the negative end cap is connected to the negative pole column and the negative pole ear and is negatively charged.
  • To prevent the secondary battery from short-circuiting it is necessary to do a good job of insulation between the negative metal adapter and the cylindrical shell and the bare aluminum sheet of the negative end cap.
  • the insulating component and the bare aluminum sheet of the negative end cap need to maintain extremely high assembly accuracy when installing, and the production efficiency of the secondary battery is low.
  • the present application provides an end cover assembly, an energy storage device and an electrical equipment with high assembly efficiency.
  • the present application provides an end cap assembly.
  • the end cap assembly is applied to an energy storage device.
  • the end cap assembly includes an insulating member, a cover body and a pole.
  • the insulating member includes a first body and a convex portion.
  • the first body has a first surface and a second surface arranged opposite to each other, and the first body includes a bottom wall and a side wall.
  • the side wall is arranged at the outer periphery of the bottom wall and extends in a direction away from the second surface.
  • the first surface is the surface of the side wall away from the bottom wall.
  • the convex portion protrudes from the bottom wall toward the first surface, and the convex portion is formed with a first through hole.
  • the bottom wall, the side wall and the convex portion together form a cavity, and the cavity surrounds at least a portion of the convex portion.
  • the cover body is arranged on the first surface, and the cover body includes a second body and a liquid injection portion.
  • the second body is formed with a second through hole, and the second through hole is connected to the first through hole.
  • the liquid injection portion protrudes from the second body toward the side where the convex portion is located, and extends into the cavity.
  • the liquid injection portion is spaced from the second through hole, and at least a portion of the liquid injection portion is accommodated in the cavity.
  • the pole passes through the second through hole and the first through hole, and is at least partially exposed from the cover.
  • the bottom wall of the first body, the side wall of the first body and the convex part together form a cavity, and the cavity surrounds at least a portion of the convex part.
  • the cover body can be blindly adjusted (rotated) in the circumferential direction of the first through hole until the liquid injection part does not abut on the upper surface of the convex part, and it can be confirmed that the liquid injection part is aligned with the cavity.
  • the cover body and the insulating member are stably covered and fixed.
  • the present application provides an energy storage device, comprising a shell and an end cover assembly as described in the first aspect, wherein the end cover assembly is installed on one side of the shell.
  • the bottom wall of the first body, the side wall of the first body and the convex part together form a cavity, and the cavity surrounds at least a portion of the convex part.
  • the first through hole can be blindly adjusted (the cover body is rotated) in the circumferential direction until the liquid injection part does not abut on the upper surface of the convex part, so that it can be confirmed that the liquid injection part is aligned with the cavity.
  • the cover body and the insulating part are stably covered and fixed.
  • the present application provides an electrical device, wherein the electrical device comprises the energy storage device as described in the second aspect, and the energy storage device supplies power to the electrical device.
  • the bottom wall of the first body, the side wall of the first body and the convex part together form a cavity, and the cavity surrounds at least a part of the convex part.
  • the first through hole can be blindly adjusted (the cover body is rotated) in the circumferential direction until the liquid injection part does not abut against the top wall of the convex part, so that it can be confirmed that the liquid injection part is aligned with the cavity.
  • the cover body and the insulating part are stably covered and fixed.
  • FIG1 is a schematic diagram of a scenario of an energy storage device provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a three-dimensional structure of an energy storage device provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of a three-dimensional exploded structure of an end cap assembly provided in an embodiment of the present application.
  • FIG. 4 is a cross-sectional schematic diagram of the end cover assembly of the energy storage device shown in FIG. 2 along line IV-IV;
  • FIG5 is a schematic diagram of a three-dimensional structure of an insulating member in an end cap assembly provided in an embodiment of the present application
  • FIG6 is a schematic diagram of a distribution of first holes and second holes in an insulating member provided in an embodiment of the present application.
  • FIG7 is a schematic diagram of another distribution of first holes and second holes in an insulating member provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of a three-dimensional structure of an adapter in an end cover assembly provided in an embodiment of the present application in an expanded state;
  • FIG. 9 is a schematic diagram of a three-dimensional structure of an adapter in an end cover assembly provided in an embodiment of the present application in a bent state.
  • Energy storage device 1000 end cap assembly 100, insulating member 10, first body 11, first surface 111, second surface 113, Bottom wall 115, side wall 117, convex portion 13, first through hole 131, upper surface 133, cavity 15, first area 151, first hole 1511, first end 152, second area 153, second hole 1531, second end 154, accommodating groove 16, opening 161, cover body 30, second body 31, second through hole 311, liquid filling portion 33, explosion-proof valve portion 35, pole 50, adapter 70, disk body portion 71, extension portion 73, shell 200, photovoltaic panel 2000, street lamp 3000a, household appliance 3000b.
  • connection and “coupling” mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).
  • the main way to generate green electricity is to develop green energy such as photovoltaics and wind power to replace fossil energy.
  • the generation of green electricity generally relies on photovoltaics, wind power, water potential, etc., while wind and solar energy generally have strong intermittent and volatile problems, which will cause instability in the power grid, insufficient electricity during peak hours, too much electricity during low hours, and unstable voltage will also cause damage to electricity.
  • this solution provides an energy storage device 1000, which is equipped with a chemical battery.
  • the chemical elements in the chemical battery are mainly used as energy storage media.
  • the charging and discharging process is accompanied by chemical reactions or changes in the energy storage medium.
  • the electricity generated by wind energy and solar energy is stored in the chemical battery.
  • the use of external electricity reaches a peak, the stored electricity is released for use, or transferred to places where electricity is scarce for use.
  • energy storage i.e., energy storage
  • power generation side energy storage grid side energy storage
  • renewable energy grid-connected energy storage renewable energy grid-connected energy storage
  • user side energy storage user side energy storage.
  • the corresponding types of energy storage devices 1000 include:
  • FIG1 is a schematic diagram of a scenario of an energy storage device 1000 provided in an embodiment of the present application.
  • the energy storage device 1000 of the present application is not limited to a household energy storage scenario.
  • the present application provides a household energy storage system, which includes an electric energy conversion device (photovoltaic panel 2000), user load (street lamp 3000a) user load (household appliance 3000b), etc. and an energy storage device 1000, which is a small energy storage box that can be mounted on an outdoor wall by wall hanging.
  • the photovoltaic panel 2000 can convert solar energy into electric energy during the period of low electricity prices, and the energy storage device 1000 is used to store the electric energy and supply it to electric devices such as street lamps 3000a and household appliances 3000b for use during peak electricity prices, or to supply power when the power grid is out of power/power outage.
  • the energy storage device 1000 may include but is not limited to a single cell, a battery module, a battery pack, a battery system, etc.
  • the energy storage device 1000 may be a round battery.
  • the energy storage device 1000 provided in the embodiment of the present application includes a housing 200 and an end cover assembly 100 provided in the embodiment of the present application.
  • the end cover assembly 100 is installed on one side of the housing 200 .
  • the end cap assembly 100 provided in the embodiment of the present application includes an insulating member 10, a cover body 30 and a pole 50.
  • the insulating member 10 includes a first body 11, a protrusion 13 and a cavity 15.
  • the first body 11 has a first surface 111 and a second surface 113 disposed opposite to each other.
  • the first body 11 includes a bottom wall 115 and a side wall 117.
  • the side wall 117 is disposed at the outer periphery of the bottom wall 115 and extends in a direction away from the second surface 113.
  • the first surface 111 is a surface of the side wall 117 away from the bottom wall 115.
  • the protrusion 13 protrudes from the bottom wall 115 toward the first surface 111.
  • the protrusion 13 is formed with a first through hole 131.
  • the bottom wall 115, the side wall 117 and the protrusion 13 together form a cavity 15.
  • the cavity 15 surrounds at least a portion of the protrusion 13.
  • the cover 30 is covered on the first surface 111, and includes a second body 31 and a liquid injection portion 33.
  • the second body 31 is formed with a second through hole 311, and the second through hole 311 is communicated with the first through hole 131.
  • the liquid injection portion 33 protrudes from the second body 31 toward the side where the convex portion 13 is located, and extends into the cavity 15.
  • the liquid injection portion 33 is spaced from the second through hole 311, and at least part of the liquid injection portion 33 is accommodated in the cavity 15.
  • the pole 50 is penetrated by the second through hole 311 and the first through hole 131, and at least part of it is exposed from the cover 30.
  • the bottom wall 115 of the first body 11, the side wall 117 of the first body 11 and the convex portion 13 together form a cavity 15, and the cavity 15 surrounds at least a portion of the convex portion 13.
  • the pole 50 installed on the cover 30 can be first aligned with the first through hole 131 of the insulating member 10. At this time, it is confirmed whether the portion of the liquid injection portion 33 that can be accommodated in the cavity 15 is correctly extended into the cavity 15, so as to confirm whether the cover 30 and the insulating member 10 are correctly assembled. If the liquid injection portion 33 abuts against the convex portion 13, the cover 30 will be lifted by the upper surface 133 of the convex portion 13, so that the cover 30 cannot fit on the first surface 111 and cover the insulating member 10.
  • the first surface 111 is closer to the cover 30 than the second surface 113 , and the protrusion 13 is formed by the second surface 113 being recessed toward the first surface 111 .
  • the projection area of the first body 11 is circular
  • the projection area of the convex portion 13 is approximately runway-shaped
  • the projection area of the cavity 15 is approximately U-shaped.
  • the first through hole 131 is located at the center of the first body 11, and the cavity 15 surrounds at least a portion of the convex portion 13.
  • the height of the protrusion 13 is equal to the height of the side wall 117 of the first body 11.
  • the height of the protrusion 13 is equal to the height of the side wall 117 of the first body 11, so that the protrusion 13 protrudes from the bottom wall 115 toward the first surface 111 until it is flush with the first surface 111, that is, the upper surface of the protrusion 13 and the first surface 111 are located in the same plane, wherein the upper surface of the protrusion 13 is: along the axis direction of the first through hole 131, the surface of the protrusion 13 facing the cover 30.
  • the height of the protrusion 13 is equal to the depth of the cavity 15, so that the height of the portion of the injection portion 33 that can extend into the cavity 15 can be set smaller, and when the injection portion 33 abuts against the upper surface of the protrusion 13, the cover 30 is more obviously lifted up.
  • one end of the protrusion 13 extends to the outer periphery of the first body 11 and is connected to the side wall 117.
  • the side wall 117 is provided at a portion of the outer periphery of the first body 11, and a notch is formed at the portion of the outer periphery of the first body 11 where the side wall 117 is not provided.
  • the notch is connected to the protrusion 13 at both ends of the circumference of the first through hole 131, that is, one end of the protrusion 13 along the radial direction of the first through hole 131 extends to the notch.
  • the position of the notch facilitates the installation of the adapter 70.
  • One end of the protrusion 13 along the radial direction of the second through hole 311 extends to the outer periphery of the first body 11, and both sides of the end of the protrusion 13 along the circumferential direction are connected to the side wall 117, so as to facilitate the installation of other components (such as the adapter 70) in the end cover assembly 100 on the insulating member 10.
  • the cavity 15 includes a first area 151 and a second area 153 that are connected, the bottom of the first area 151 (i.e., the bottom wall 115 located at the first area 151) is formed with at least one first hole 1511, the bottom of the second area 153 (i.e., the bottom wall 115 located at the second area 153) is formed with at least one second hole 1531, and the cover body 30 also includes an explosion-proof valve portion 35, the explosion-proof valve portion 35 is spaced from the second through hole 311, and the explosion-proof valve portion 35 is spaced from the liquid injection portion 33 and is located at opposite ends of the second through hole 311.
  • the liquid injection portion 33 is arranged opposite to the first area 151, and the explosion-proof valve portion 35 is arranged opposite to the second area 153.
  • the explosion-proof valve portion 35 and the liquid injection portion 33 may be symmetrically arranged with respect to the diameter of the second through hole 311 .
  • both the liquid injection portion 33 and the explosion-proof valve portion 35 include through holes, so as to facilitate liquid injection through the liquid injection portion 33 and exhaust through the explosion-proof valve portion 35 .
  • the cavity 15 may include a first end 152 and a second end 154.
  • the cover body 30 When the cover body 30 is installed on the insulating member 10, and the liquid injection portion 33 and the explosion-proof valve portion 35 are respectively located on opposite sides of the convex portion 13, as shown in Figure 3, when the liquid injection portion 33 moves from the first end 152 to the explosion-proof valve portion 35 to the second end 154, the area swept by the liquid injection portion 33 is the first area 151, and the area swept by the explosion-proof valve portion 35 is the second area 153.
  • the first hole 1511 and the second hole 1531 may be circular holes. It is understood that the shapes of the first hole 1511 and the second hole 1531 may also be rectangular, triangular, elliptical or other polygonal shapes, which are not limited in the present application.
  • the first hole 1511 and the second hole 1531 may be through holes.
  • At least one first hole 1511 is provided in the first area 151 corresponding to the liquid injection part 33.
  • the electrolyte is injected through the liquid injection part 33, the injection efficiency can be accelerated through the at least one first hole 1511; at least one second hole 1531 is provided in the second area 153 corresponding to the explosion-proof valve part 35.
  • the gas can be quickly discharged through the at least one second hole 1531 to ensure the pressure balance inside the energy storage device 1000 and maintain the energy storage device 1000.
  • the safety performance and cycle life of the energy storage device 1000 are verified.
  • the cavity 15 surrounds at least a portion of the convex portion 13, and the cover 30 can be rotated.
  • the cover 30 can also be rotated until the liquid injection portion 33 is located between the first area 151 and the second area 153. In this way, during liquid injection, liquid injection can be achieved through the first hole 1511 and the second hole 1531, thereby improving the liquid injection efficiency.
  • the size of the first hole 1511 is the same as the size of the second hole 1531.
  • the cover 30 and the insulating member 10 there is no need to distinguish the first area 151 from the second area 153, which further reduces the precision requirements of the operator during assembly.
  • the area where the liquid injection part 33 is located is the first area 151
  • the area where the explosion-proof valve part 35 is located is the second area 153.
  • a plurality of first holes 1511 are formed at the bottom of the first region 151, and a plurality of second holes 1531 are formed at the bottom of the second region 153, that is, the number of the first holes 1511 and the number of the second holes 1531 are both multiple, and the distribution density of the plurality of first holes 1511 is greater than the distribution density of the plurality of second holes 1531.
  • the first region 151 corresponds to the injection portion 33, and the distribution density of the plurality of first holes 1511 is greater.
  • the second region 153 corresponds to the explosion-proof valve portion 35, and the distribution density of the plurality of second holes 1531 is smaller, which can prevent the explosion-proof valve (the explosion-proof valve portion 35 is equipped with an explosion-proof valve) from being damaged when the electrolyte splashes toward the insulating member 10 when the energy storage device 1000 is impacted, thereby further improving the safety performance and cycle life of the energy storage device 1000.
  • the cover body 30 when installing the cover body 30 and the insulating member 10, if the injection part 33 abuts against the protrusion 13 during assembly, the cover body 30 can be rotated to adjust and confirm that the injection part 33 does not abut against the protrusion 13, and the distribution density of the holes in the first area 151 and the second area 153 can be observed through the through hole at the injection part, and then the positions of the injection part 33 and the explosion-proof valve part 35 can be continued to be rotated and adjusted relative to the cover body 30 according to the distribution density of the multiple first holes 1511 and the distribution density of the multiple second holes 1531, so that the injection part 33 is aligned with the first holes 1511 with a large distribution density, the explosion-proof valve part 35 is aligned with the second holes 1531 with a small distribution density, and the injection part 33 is aligned with the first area 151, thereby improving the installation efficiency and thereby improving the production efficiency of the energy storage device 1000.
  • the size of the first hole 1511 is larger than the size of the second hole 1531.
  • the cover 30 and the insulating member 10 are installed, the cover 30 covers the insulating member 10 and adjusts the injection part 33 to align with the cavity 15, and then the through hole at the injection part 33 can be observed and the cover 30 can be rotated to adjust the injection part 33 to the first area 151.
  • the size of the first hole 1511 is larger than that of the second hole 1531.
  • the second hole 1531 located at the explosion-proof valve part 35 is smaller in size, which can prevent the explosion-proof valve (the explosion-proof valve part 35 is equipped with an explosion-proof valve) from being damaged when the electrolyte splashes toward the insulating member 10 when the energy storage device 1000 is hit, thereby improving the safety performance and cycle life of the energy storage device 1000.
  • the difference D1 between the diameter of the first hole 1511 and the diameter of the second hole 1531 satisfies: 0.3mm ⁇ D1 ⁇ 1.0mm.
  • the difference D1 between the diameter of the first hole 1511 and the diameter of the second hole 1531 can be 0.3mm, 0.46mm, 0.54mm, 0.63mm, 0.67mm, 0.73mm, 0.8mm, 0.84mm, 0.94mm, or 1mm.
  • the first hole 1511 and the second hole 1531 can both be circular holes, and the difference D1 between the diameter of the first hole 1511 and the diameter of the second hole 1531 is set to be greater than or equal to 0.3 mm and less than or equal to 1.0 mm.
  • the first hole 1511 in the first area 151 close to the second area 153 and the second hole 1531 in the second area 153 close to the first area 151 are of similar size.
  • the cover body 30 can be rotated and the injection part 33 can be rotated to the position of the first area 151 close to the second area 153 for injection.
  • the uniformity of the injection can be improved.
  • the number of the first holes 1511 and the number of the second holes 1531 are both multiple, and in the direction from the first area 151 to the second area 153, the size of the multiple first holes 1511 and the size of the multiple second holes 1531 decrease successively, and the size of the multiple first holes 1511 is larger than the size of the multiple second holes 1531.
  • the size of the plurality of first holes 1511 gradually decreases, and the size of the plurality of second holes 1531 also gradually decreases, and the size of the plurality of first holes 1511 is always greater than the size of the plurality of second holes 1531.
  • the interval between the injection part 33 and the explosion-proof valve part 35 can be set farther, so that when the cover body 30 is installed on the insulating member 10, the injection part 33 is located at the first hole 1511 with the largest size in the first region 151, thereby improving the injection efficiency.
  • the explosion-proof valve portion 35 is located at the second hole 1531 with the smallest size in the second area 153, which can prevent the explosion-proof valve (the explosion-proof valve portion 35 is equipped with an explosion-proof valve) from being damaged when the electrolyte splashes toward the insulating component 10 when the energy storage device 1000 is impacted, thereby improving the safety performance and cycle life of the energy storage device 1000.
  • the difference D2 between the diameter of the largest first hole 1511 and the diameter of the smallest second hole 1531 satisfies: 0.3mm ⁇ D2 ⁇ 1.0mm.
  • the difference D2 between the diameter of the largest first hole 1511 and the diameter of the smallest second hole 1531 can be 0.3mm, 0.46mm, 0.54mm, 0.63mm, 0.67mm, 0.73mm, 0.8mm, 0.84mm, 0.94mm, or 1mm.
  • the insulating member 10 further includes a receiving groove 16, and the receiving groove 16 is formed on the other side of the protrusion 13, and the receiving groove 16 corresponds to the protrusion 13 along the axial direction of the first through hole 131.
  • the protrusion 13 is formed by the second surface 113 being recessed toward the first surface 111, and the upper surface 133 of the protrusion 13 is higher than the bottom wall 115.
  • the receiving groove 16 corresponding to the protrusion 13 is formed on the side where the second surface 113 is located, and the receiving groove 16 can be used to install a part of the structure of the adapter 70, so that when the adapter 70 is installed in the housing 200, the space occupied by the adapter 70 can be appropriately reduced.
  • the receiving groove 16 is formed with an opening 161
  • the end cover assembly 100 further includes an adapter 70
  • the adapter 70 includes a disk body 71 and an extension 73 connected to each other
  • the extension 73 extends from the opening 161 into the receiving groove 16
  • the disk body 71 blocks the receiving groove 16.
  • the opening 161 of the receiving groove 16 is a notch formed by the side wall 117 of the first body 11, and the extension 73 of the adapter 70 can extend into the receiving groove 16 from the opening 161.
  • the adapter 70 can be bent, and the extension 73 can be bent relative to the disk body 71, so that the disk body 71 blocks the receiving groove 16, and the disk body 71 is opposite to the insulating member 10 in the axial direction of the first through hole 131.
  • the setting of the protrusion 13 corresponding to the receiving groove 16 can improve the installation efficiency of the cover body 30 and the insulating member 10.
  • the extension portion 73 of the adapter 70 is received in the receiving groove 16 , which can reduce the space occupied by the bent adapter 70 in the shell 200 , and can effectively improve the energy density of the electrode assembly.
  • the projected area of the insulating member 10 is larger than the projected area of the disk portion 71 and smaller than the projected area of the cover 30.
  • the insulating member 10 is located between the cover 30 and the adapter 70, and the projected area of the insulating member 10 is larger than the projected area of the disk portion 71 and smaller than the projected area of the cover 30, so that the insulating member 10 can effectively avoid the short circuit between the adapter 70 and the cover 30 after bending.
  • the insulating member 10 with a larger projected area can still play an insulating protection role, effectively improving the safety performance of the energy storage device 1000.
  • the present application also provides an electrical device.
  • the electrical device includes the energy storage device 1000 provided in the present application.
  • the energy storage device 1000 is used to supply power to electrical devices, which may include but are not limited to battery vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, mobile phones, portable devices, PDAs, laptop computers, etc.
  • the bottom wall 115 of the first body 11, the side wall 117 of the first body 11 and the convex portion 13 together form a cavity 15, and the cavity 15 surrounds at least a portion of the convex portion 13.
  • the pole 50 installed on the cover 30 can be first aligned with the first through hole 131 of the insulating member 10. At this time, it is confirmed whether the portion of the liquid injection portion 33 that can be accommodated in the cavity 15 is correctly extended into the cavity 15, and it can be confirmed whether the cover 30 and the insulating member 10 are assembled correctly. There is no need to manually align the position of the liquid injection portion 33.
  • the cover body 30 can be blindly adjusted (rotated) in the circumferential direction of the first through hole 131 until the liquid injection part 33 does not abut against the upper surface 133 of the protrusion 13, so that it can be confirmed that the liquid injection part 33 is aligned with the cavity 15.
  • the cover body 30 and the insulating member 10 are stably covered and fixed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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Abstract

本申请提供一种端盖组件、储能装置及用电设备。应用于储能装置的端盖组件包括：绝缘件包括第一本体和凸部。第一本体具有相背设置的第一表面和第二表面，第一本体包括底壁和侧壁，侧壁设于底壁的外周缘并朝背离第二表面的方向延伸，第一表面为侧壁的背离底壁的表面。凸部自底壁朝向第一表面凸起并形成有第一通孔，底壁、侧壁和凸部共同形成腔体，腔体环绕凸部的至少一部分。盖体盖设于第一表面，盖体包括第二本体和注液部，第二本体形成有第二通孔，第二通孔与第一通孔连通，注液部自第二本体朝凸部所在的一侧凸起并延伸至腔体内，注液部与第二通孔间隔，注液部的至少部分收容于腔体。极柱穿设第二通孔和第一通孔并至少部分露出于盖体。

Description

端盖组件、储能装置及用电设备
本申请要求于2023年03月30日提交中国专利局、申请号为202310330845.6、申请名称为“端盖组件、储能装置及用电设备”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
本申请涉及储能装置技术领域，尤其涉及一种端盖组件、储能装置及用电设备。
背景技术
储能装置如二次电池又称为充电电池或蓄电池，是指在电池放电后可通过充电的方式使活性物质激活而继续使用的电池。二次电池的可循环利用特性使其逐渐成为用电设备的主要动力来源。随着二次电池的需求量逐渐增大，人们对其各方面的性能要求也越来越高，尤其是对于二次电池的循环性能和安全性能的要求。
二次电池如圆柱形锂离子电池，是由端盖组件、电极组件和圆柱形壳体组成。端盖组件包括分别位于圆柱形壳体两端的正极端盖和负极端盖，正极端盖、负极端盖自两端与圆柱形壳体焊接密封，正极端盖的光铝片、圆柱形壳体和负极端盖的光铝片在焊接密封后导通并带正电，而负极端盖处的负极金属转接件与负极极柱以及负极极耳连接并带负电，防止二次电池出现短路情况，需要做好负极金属转接件与圆柱形壳体以及负极端盖的光铝片之间的绝缘处理，而绝缘部件与负极端盖的光铝片安装时需要保持极高的装配精度，二次电池的生产效率低。
发明内容
本申请提供一种装配效率高的端盖组件、储能装置及用电设备。
第一方面，本申请提供一种端盖组件。所述端盖组件应用于储能装置上。所述端盖组件包括绝缘件、盖体和极柱。所述绝缘件包括第一本体和凸部。所述第一本体具有相背设置的第一表面和第二表面，所述第一本体包括底壁和侧壁，所述侧壁设置于所述底壁的外周缘，并朝背离所述第二表面的方向延伸，所述第一表面为所述侧壁的背离所述底壁的表面。所述凸部自所述底壁朝向所述第一表面凸起，所述凸部形成有第一通孔，所述底壁、所述侧壁和所述凸部共同形成腔体，所述腔体环绕所述凸部的至少一部分。所述盖体盖设于第一表面，所述盖体包括第二本体和注液部，所述第二本体形成有第二通孔，所述第二通孔与所述第一通孔连通。所述注液部自所述第二本体朝所述凸部所在的一侧凸起，并延伸至所述腔体内。所述注液部与所述第二通孔间隔，所述注液部的至少部分收容于所述腔体。所述极柱穿设所述第二通孔和所述第一通孔，并至少部分露出于所述盖体。
本申请的端盖组件中，第一本体的底壁、第一本体的侧壁和凸部共同形成腔体，且腔体环绕凸部的至少一部分。安装盖体和绝缘件时，可先将安装于盖体上的极柱对应绝缘件的第一通孔，此时确认注液部能够收容于腔体的部分是否正确伸入腔体，便可确认盖体与绝缘件是否装配正确，无需人工对准注液部的位置，只需要在第一通孔的周向上转动盖体或绝缘件，便可调整注液部对准腔体，快速完成绝缘件与壳体的安装，降低操作人员装配的精度要求， 进一步提升储能装置的生产效率。其中，将极柱对准第一通孔并将盖体盖合于绝缘件上时，若注液部抵接在凸部上，盖体将会被凸部的上表面(凸部朝向盖体的表面)顶起导致盖体无法贴合在第一表面上与绝缘件盖合，此时，可以在第一通孔的周向上盲调(转动盖体)，直至注液部不抵接在凸部的上表面，便可确认注液部对准腔体，此时，盖体与绝缘件稳定盖合并固定。
第二方面，本申请提供一种储能装置，所述储能装置包括壳体和如第一方面所述的端盖组件，所述端盖组件安装于所述壳体的一侧。
本申请的储能装置中，第一本体的底壁、第一本体的侧壁和凸部共同形成腔体，且腔体环绕凸部的至少一部分。安装盖体和绝缘件时，可先将安装于盖体上的极柱对应绝缘件的第一通孔，此时确认注液部能够收容于腔体的部分是否正确伸入腔体，便可确认盖体与绝缘件是否装配正确，无需人工对准注液部的位置，只需要在第一通孔的周向上转动盖体或绝缘件，便可调整注液部对准腔体，快速完成绝缘件与壳体的安装，降低操作人员装配的精度要求，进一步提升储能装置的生产效率。其中，将极柱对准第一通孔并将盖体盖合于绝缘件上时，若注液部抵接在凸部上，盖体将会被凸部的上表面顶起导致盖体无法贴合在第一表面上与绝缘件盖合，此时，可以在第一通孔的周向上盲调(转动盖体)，直至注液部不抵接在凸部的上表面，便可确认注液部对准腔体，此时，盖体与绝缘件稳定盖合并固定。
第三方面，本申请提供一种用电设备，所述用电设备包括如第二方面所述的储能装置，所述储能装置为所述用电设备供电。
本申请的用电设备中，第一本体的底壁、第一本体的侧壁和凸部共同形成腔体，且腔体环绕凸部的至少一部分。安装盖体和绝缘件时，可先将安装于盖体上的极柱对应绝缘件的第一通孔，此时确认注液部能够收容于腔体的部分是否正确伸入腔体，便可确认盖体与绝缘件是否装配正确，无需人工对准注液部的位置，只需要在第一通孔的周向上转动盖体或绝缘件，便可调整注液部对准腔体，快速完成绝缘件与壳体的安装，降低操作人员装配的精度要求，进一步提升储能装置的生产效率。其中，将极柱对准第一通孔并将盖体盖合于绝缘件上时，若注液部抵接在凸部上，盖体将会被凸部的上表面顶起导致盖体无法贴合在第一表面上与绝缘件盖合，此时，可以在第一通孔的周向上盲调(转动盖体)，直至注液部不抵接在凸部的顶壁，便可确认注液部对准腔体，此时，盖体与绝缘件稳定盖合并固定。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍。
图1是本申请实施方式提供的一种储能装置的场景示意图；
图2是本申请实施方式提供的一种储能装置的立体结构示意图；
图3是本申请实施方式提供的一种端盖组件的立体分解结构示意图；
图4是图2所示的储能装置中端盖组件沿IV-IV线的剖面示意图；
图5是本申请实施方式提供的一种端盖组件中的绝缘件的立体结构示意图；
图6是本申请实施方式提供的绝缘件中第一孔和第二孔的一种分布情况的示意图；
图7是本申请实施方式提供的绝缘件中第一孔和第二孔的另一种分布情况的示意图；
图8是本申请实施方式提供的一种端盖组件中转接件处于展开状态的立体结构示意图；
图9是本申请实施方式提供的一种端盖组件中转接件处于弯折状态的立体结构示意图。
附图标记：
储能装置1000、端盖组件100、绝缘件10、第一本体11、第一表面111、第二表面113、
底壁115、侧壁117、凸部13、第一通孔131、上表面133、腔体15、第一区域151、第一孔1511、第一端152、第二区域153、第二孔1531、第二端154、容置槽16、开口161、盖体30、第二本体31、第二通孔311、注液部33、防爆阀部35、极柱50、转接件70、盘体部71、延伸部73、壳体200、光伏板2000、路灯3000a、家用电器3000b。
具体实施方式
下面将结合本申请实施方式中的附图，对本申请实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本申请保护的范围。
以下各实施方式的说明是参考附加的图示，用以例示本申请可用以实施的特定实施方式。本中所提到的方向用语，例如，“上”、“下”、“前”、“后”、“左”、“右”、“内”、“外”、“侧面”等，仅是参考附加图式的方向，因此，使用的方向用语是为了更好、更清楚地说明及理解本申请，而不是指示或暗指所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，本文中为部件所编序号本身，例如“第一”、“第二”等，仅用于区分所描述的对象，不具有任何顺序或技术含义。而本申请所说“连接”、“联接”，如无特别说明，均包括直接和间接连接(联接)。
由于人们所需要的能源都具有很强的时间性和空间性，为了合理利用能源并提高能量的利用率，需要通过一种介质或者设备，把一种能量形式用同一种或者转换成另外一种能量形式存储起来，基于未来应用需要再以特定能量形式释放出来。众所周知，要实现碳中和的大目标，目前绿色电能的产生主要途径是发展光伏、风电等绿色能源来替代化石能源。目前绿色电能的产生普遍依赖于光伏、风电、水势等，而风能和太阳能等普遍存在间歇性强、波动性大的问题，会造成电网不稳定，用电高峰电不够，用电低谷电太多，不稳定的电压还会对电力造成损害，因此可能因为用电需求不足或电网接纳能力不足，引发“弃风弃光”问题，要解决这些问题须依赖储能。即将电能通过物理或者化学的手段转化为其他形式的能量存储起来，在需要的时候将能量转化为电能释放出来，简单来说，储能就类似一个大型“充电宝”，在光伏、风能充足时，将电能储存起来，在需要时释放储能的电力。
以电化学储能为例，本方案提供一种储能装置1000，储能装置1000内设有化学电池，主要是利用化学电池内的化学元素做储能介质，充放电过程伴随储能介质的化学反应或者变化，简单说就是把风能和太阳能产生的电能存在化学电池中，在外部电能的使用达到高峰时再将存储的电量释放出来使用，或者转移给电量紧缺的地方再使用。
目前的储能(即能量存储)应用场景较为广泛，包括发电侧储能、电网侧储能、可再生能源并网储能以及用户侧储能等方面，对应的储能装置1000的种类包括有：
(1)应用在电网侧储能场景的大型储能集装箱，其可作为电网中优质的有功无功调节电源，实现电能在时间和空间上的负荷匹配，增强可再生能源消纳能力，并在电网系统备用、 缓解高峰负荷供电压力和调峰调频方面意义重大；
(2)应用在用户侧的工商业储能场景(银行、商场等)的中小型储能电柜以及应用在用户侧的家庭储能场景的户用小型储能箱，主要运行模式为“削峰填谷”。由于根据用电量需求在峰谷位置的电费存在较大的价格差异，用户有储能设备后，为了减少成本，通常在电价低谷期，对储能柜/箱进行充电处理；电价高峰期，再将储能设备中的电放出来进行使用，以达到节省电费的目的。另外，在边远地区，以及地震、飓风等自然灾害高发的地区，家用储能装置的存在，相当于用户为自己和电网提供了备用电源，免除由于灾害或其他原因导致的频繁断电带来的不便。
本申请实施例以用户侧储能中的家用储能场景为例进行说明，图1为本申请实施方式提供的一种储能装置1000的场景示意图，本申请储能装置1000并不限定于家用储能场景。
如图1所示，本申请提供一种户用储能系统，该户用储能系统包括电能转换装置(光伏板2000)、用户负载(路灯3000a)用户负载(家用电器3000b)等以及储能装置1000，该储能装置1000为一小型储能箱，可通过壁挂方式安装于室外墙壁。具体的，光伏板2000可以在电价低谷时期将太阳能转换为电能，储能装置1000用于储存该电能并在电价高峰时供给路灯3000a和家用电器3000b等用电设备进行使用，或者在电网断电/停电时进行供电。
可以理解的是，储能装置1000可包括但不限于单体电池、电池模组、电池包、电池系统等。当该储能装置1000为单体电池时，其可为圆形电池。
请参阅图2，本申请实施例提供的储能装置1000包括壳体200和本申请实施例提供的端盖组件100，端盖组件100安装于壳体200的一侧。
请结合图3和图4，本申请实施例提供的端盖组件100包括绝缘件10、盖体30和极柱50。绝缘件10包括第一本体11、凸部13和腔体15。第一本体11具有相背设置的第一表面111和第二表面113。第一本体11包括底壁115和侧壁117，侧壁117设置于底壁115的外周缘，并朝背离第二表面113的方向延伸，第一表面111为侧壁117的背离底壁115的表面。凸部13自底壁115朝向第一表面111凸起，凸部13形成有第一通孔131，底壁115、侧壁117和凸部13共同形成腔体15，腔体15环绕凸部13的至少一部分。盖体30盖设于第一表面111，盖体30包括第二本体31和注液部33，第二本体31形成有第二通孔311，第二通孔311与第一通孔131连通，注液部33自第二本体31朝凸部13所在的一侧凸起，并延伸至腔体15内。注液部33与第二通孔311间隔，注液部33的至少部分收容于腔体15。极柱50穿设第二通孔311和第一通孔131，并至少部分露出于盖体30。
本申请的端盖组件100和储能装置1000中，第一本体11的底壁115、第一本体11的侧壁117和凸部13共同形成腔体15，且腔体15环绕凸部13的至少一部分。安装盖体30和绝缘件10时，无需人工对准注液部33的位置，只需要在第一通孔131的周向上转动盖体30或绝缘件10，便可调整注液部33对准腔体15，快速完成绝缘件10与壳体200的安装，降低操作人员装配的精度要求，进一步提升储能装置1000的生产效率。
当转动盖体30将盖体30装配在绝缘件10上时，可先将安装于盖体30上的极柱50对应绝缘件10的第一通孔131，此时确认注液部33能够收容于腔体15的部分是否正确伸入腔体15，便可确认盖体30与绝缘件10是否装配正确。其中，若注液部33抵接在凸部13上，盖体30将会被凸部13的上表面133顶起导致盖体30无法贴合在第一表面111上与绝缘件10盖合，此时，可以在第一通孔131的周向上盲调(转动盖体30)，直至注液部33不抵接在凸部13的上表面133，便可确认注液部33对准腔体15，此时，盖体30与绝缘件10稳定盖合并固定。
可以理解，盖体30盖合于绝缘件10上时，第一表面111相较于第二表面113更靠近盖体30，凸部13由第二表面113朝第一表面111凹陷形成。
请结合图5，在本申请的实施例中，沿第一通孔131的轴线方向上，第一本体11的投影面积为圆形，凸部13的投影面积大致为跑道型，腔体15的投影面积大致呈U形。第一通孔131位于第一本体11的中心位置处，腔体15环绕凸部13的至少一部分。
请结合图3，示例地，沿第一通孔131的轴线方向上，凸部13的高度等于第一本体11的侧壁117的高度。凸部13凸起的高度等于第一本体11的侧壁117的高度，使得凸部13自底壁115朝向第一表面111凸起至与第一表面111齐平，即凸部13的上表面与第一表面111位于同一平面，其中，凸部13的上表面为：沿第一通孔131的轴线方向上，凸部13朝向盖体30的表面。凸部13的高度和腔体15的深度是相等的，使得注液部33能够伸入腔体15的部分的高度可以设置得较小，在注液部33抵接在凸部13的上表面时，使得盖体30被顶起更为明显。
示例地，凸部13的一端延伸至第一本体11的外周缘，并与侧壁117相连接。侧壁117设于第一本体11的外周缘的一部分，第一本体11的外周缘未设有侧壁117的部分形成有缺口，缺口沿第一通孔131的周向的两端与凸部13连接，也就是说，凸部13沿第一通孔131的径向的一个端部延伸至缺口处。其中，该缺口的位置方便转接件70安装。凸部13沿第二通孔311的径向的一个端部延伸至第一本体11的外周缘，且凸部13的该端部沿周向的两侧均与侧壁117相连接，方便端盖组件100中的其他部件(如转接件70)安装于绝缘件10。
示例地，腔体15包括连通的第一区域151和第二区域153，第一区域151的底部(即，位于第一区域151处的底壁115)形成有至少一个第一孔1511，第二区域153的底部(即，位于第二区域153处的底壁115)形成有至少一个第二孔1531，盖体30还包括防爆阀部35，防爆阀部35与第二通孔311间隔，防爆阀部35与注液部33间隔并位于第二通孔311的相对两端。注液部33与第一区域151相对设置，防爆阀部35与第二区域153相对设置。
可以理解，盖体30相对绝缘件10转动时，注液部33在第一区域151内移动，防爆阀部35在第二区域153内移动。
防爆阀部35与注液部33可以关于第二通孔311的直径对称设置。
可以理解，注液部33和防爆阀部35均包括通孔，以便于通过注液部33进行注液，以及通过防爆阀部35实现排气。
腔体15可包括第一端152和第二端154，当盖体30安装于绝缘件10上，且注液部33和防爆阀部35均分别位于凸部13的相对两侧时，如图3所示，注液部33从第一端152处到防爆阀部35运动至第二端154时，注液部33所扫过的区域为第一区域151，防爆阀部35扫过的区域即为第二区域153。
第一孔1511和第二孔1531均可以是圆形孔，可以理解，第一孔1511和第二孔1531的形状还可以是矩形、三角形、椭圆形或者其他多边形，本申请对此不作限定。第一孔1511和第二孔1531均可以为贯通孔。
安装盖体30和绝缘件10时，无需分别对准注液部33和防爆阀部35，只需判断注液部33是否抵接在凸部13上，以及调整确认注液部33没有抵接在凸部13上即可盖体30稳定安装于绝缘件10上。另外，注液部33对应的第一区域151内，设置有至少一个第一孔1511，通过注液部33注入电解液时，可以通过至少一个第一孔1511加快注液效率；防爆阀部35对应的第二区域153内，设置有至少一个第二孔1531，当储能装置1000内部循环产气压强增大时，可以通过至少一个第二孔1531快速排出气体，保证储能装置1000内部压强平衡，保 证储能装置1000的安全性能和循环寿命。且腔体15环绕凸部13的至少一部分，可以转动盖体30，在进行注液工序时，也可将盖体30转动至注液部33位于第一区域151和第二区域153之间，如此，进行注液时，可以通过第一孔1511和第二孔1531实现注液，提升注液效率。
示例地，第一孔1511的尺寸和第二孔1531的尺寸相同。安装盖体30和绝缘件10时，更加无需特殊区分第一区域151和第二区域153，更加降低操作人员装配时的精度要求。其中，当在注液部33位于腔体15内时，注液部33所在的区域即为第一区域151，防爆阀部35所在的区域为第二区域153。
请结合图6，示例地，第一区域151的底部形成有多个第一孔1511，第二区域153的底部形成有多个第二孔1531，即，第一孔1511的数量和第二孔1531的数量均为多个，多个第一孔1511的分布密度大于多个第二孔1531的分布密度。第一区域151对应注液部33，多个第一孔1511的分布密度更大，通过注液部33和第一孔1511进行注液工序时，可以使得电解液更快地浸润壳体200内的电极组件，提高注液效率和注液均匀性。第二区域153对应防爆阀部35，多个第二孔1531的分布密度更小，可以防止储能装置1000受到撞击时电解液朝绝缘件10处溅射时损坏防爆阀(防爆阀部35安装有防爆阀)，进一步提升储能装置1000的安全性能和循环寿命。另外，安装盖体30和绝缘件10时，如果装配时注液部33抵接在凸部13上，可以先转动盖体30调整确认至注液部33没有抵接在凸部13上，并且可以透过注液部处的通孔观察出第一区域151和第二区域153中孔的分布密度，然后根据多个第一孔1511的分布密度和多个第二孔1531的分布密度继续相对盖体30转动调整注液部33和防爆阀部35的位置，以使注液部33对准分布密度大的第一孔1511，防爆阀部35对准分布密度小的第二孔1531，将注液部33对准第一区域151，如此提升安装效率，进而提升储能装置1000的生产效率。
示例地，第一孔1511的尺寸大于第二孔1531的尺寸。安装盖体30和绝缘件10时，盖体30盖合于绝缘件10并将注液部33调整对准腔体15后，可透过注液部33处的通孔继续观察并转动盖体30将注液部33调整至第一区域151。另外，第一孔1511的尺寸相较于第二孔1531的尺寸更大，通过注液部33和第一孔1511向壳体200内的电极组件注入电解液时，可以提高注液效率和注液的均匀性。位于防爆阀部35处的第二孔1531尺寸更小，可以防止储能装置1000受到撞击时电解液朝绝缘件10处溅射时损伤防爆阀(防爆阀部35安装有防爆阀)，提升储能装置1000的安全性能和循环寿命。
示例地，第一孔1511的直径与第二孔1531的直径之间的差值D1满足：0.3mm≤D1≤1.0mm，例如，第一孔1511的直径与第二孔1531的直径之间的差值D1可以是0.3mm、0.46mm、0.54mm、0.63mm、0.67mm、0.73mm、0.8mm、0.84mm、0.94mm、或者1mm。第一孔1511和第二孔1531均可以为圆孔，第一孔1511的直径与第二孔1531的直径之间的差值D1的取值设为大于等于0.3mm且小于等于1.0mm，如此，第一区域151中靠近第二区域153处的第一孔1511，与第二区域153中靠近第一区域151处的第二孔1531，两者的尺寸相差不大，进行注液时，可转动盖体30，将注液部33转动至第一区域151靠近第二区域153的位置处进行注液，通过尺寸区别较小的第一孔1511和第二孔1531完整注液，可提升注液的均匀性。
示例地，第一孔1511的数量和所述第二孔1531的数量均为多个，自第一区域151至第二区域153的方向上，多个第一孔1511的尺寸和多个第二孔1531的尺寸均依次减小，多个第一孔1511的尺寸大于多个第二孔1531的尺寸。
例如，如图7所示，在第一区域151到第二区域153的周向方向(如图7中的虚线箭头所示)上，第一区域151内的多个第一孔1511的尺寸逐渐减小，第二区域153内的多个第二 孔1531的尺寸逐渐减小，且每个第一孔1511的尺寸均大于多个第二孔1531的尺寸。
在第一区域151到第二区域153的周向方向上，多个第一孔1511的尺寸逐渐减小，多个第二孔1531的尺寸也逐渐减小，且多个第一孔1511的尺寸始终大于多个第二孔1531的尺寸，安装盖体30和绝缘件10时，可根据尺寸最大的第一孔1511和尺寸最小的第二孔1531进行区分，将绝缘件10与盖体30相对转动以将注液部33和防爆阀部35调整并准确地安装于对应的区域，提升安装效率。在第一通孔131的周向方向上，可将注液部33和防爆阀部35之间的间隔设置得较远，如此，盖体30安装于绝缘件10上时，注液部33位于第一区域151中尺寸最大的第一孔1511处，进而提升注液效率。防爆阀部35位于第二区域153中尺寸最小的第二孔1531处，可防止储能装置1000受到撞击时电解液朝绝缘件10处溅射时损伤防爆阀(防爆阀部35安装有防爆阀)，提升储能装置1000的安全性能和循环寿命。
进一步地，尺寸最大的第一孔1511的直径与尺寸最小的第二孔1531的直径之间的差值D2满足：0.3mm≤D2≤1.0mm，例如，尺寸最大的第一孔1511的直径与尺寸最小的第二孔1531的直径之间的差值D2可以是0.3mm、0.46mm、0.54mm、0.63mm、0.67mm、0.73mm、0.8mm、0.84mm、0.94mm、或者1mm。在第一区域151到第二区域153的周向方向上，第一孔1511的尺寸逐渐减小，第二孔1531的尺寸也逐渐减小，且尺寸最大的所述第一孔1511的直径与尺寸最小的所述第二孔1531的直径之间的差值D2满足：0.3mm≤D2≤1.0mm，如此，第一区域151中靠近第二区域153处的第一孔1511，与第二区域153中靠近第一区域151处的第二孔1531，两者的尺寸差值设置得尽可能小，进行注液时，可转动盖体30，将注液部33转动至第一区域151靠近第二区域153的位置处进行注液，通过尺寸区别较小的第一孔1511和第二孔1531完整注液，可提升注液的均匀性。
请结合图4和图8，绝缘件10还包括容置槽16，凸部13的另一面形成有容置槽16，沿第一通孔131的轴线方向上，容置槽16与凸部13对应。凸部13由第二表面113朝第一表面111凹陷形成，凸部13的上表面133高于底壁115，对应地，第二表面113所在一侧，形成与凸部13对应的容置槽16，容置槽16可以用于安装转接件70的部分结构，如此，转接件70安装于壳体200内时，可以适当减小转接件70的占用空间。
请结合图9，进一步地，容置槽16形成有开口161，端盖组件100还包括转接件70，转接件70包括相连接的盘体部71和延伸部73，延伸部73自开口161伸入容置槽16，盘体部71遮挡容置槽16。可以理解，容置槽16的开口161为第一本体11的侧壁117形成的缺口，转接件70的延伸部73可以从开口161处伸入容置槽16内。转接件70能够弯折，延伸部73可相对盘体部71进行弯折，以使盘体部71遮挡容置槽16，并在第一通孔131的轴线方向上，盘体部71与绝缘件10相对。一方面，与容置槽16对应的凸部13的设置可以提升盖体30与绝缘件10的安装效率。另一方面，转接件70的延伸部73收容于容置槽16中，可以减小弯折后的转接件70在壳体200内的占用空间，可有效提升电极组件的能量密度。
请结合图9，进一步地，沿第一通孔131的轴线方向上，绝缘件10的投影面积大于盘体部71的投影面积，且小于盖体30的投影面积。具体地，转接件70处于弯折状态且安装于绝缘件10上时，沿第一通孔131的轴线方向上，绝缘件10位于盖体30和转接件70之间，且绝缘件10的投影面积大于盘体部71的投影面积并小于盖体30的投影面积，使得绝缘件10可以有效避免弯折后的转接件70与盖体30之间的短路。在储能装置1000使用过程中，即便转接件70的盘体部71因受到外界撞击变形移位，投影面积较大的绝缘件10仍可以起到绝缘防护作用，有效提升储能装置1000的安全性能。
本申请实施例还提供一种用电设备。用电设备包括本申请实施例提供的储能装置1000， 储能装置1000用于对用电设备进行供电。用电设备可以包括但不限于电瓶车、电动玩具、电动工具、电动车辆、船舶和航天器、手机、便携式设备、掌上电脑、笔记本电脑等。
本申请的用电设备中，第一本体11的底壁115、第一本体11的侧壁117和凸部13共同形成腔体15，且腔体15环绕凸部13的至少一部分。安装盖体30和绝缘件10时，可先将安装于盖体30上的极柱50对应绝缘件10的第一通孔131，此时确认注液部33能够收容于腔体15的部分是否正确伸入腔体15，便可确认盖体30与绝缘件10是否装配正确，无需人工对准注液部33的位置，只需要在第一通孔131的周向上转动盖体30或绝缘件10，便可调整注液部33对准腔体15，快速完成绝缘件10与壳体200的安装，降低操作人员装配的精度要求，进一步提升储能装置1000的生产效率。其中，将极柱50对准第一通孔131并将盖体30盖合于绝缘件10上时，若注液部33抵接在凸部13上，盖体30将会被凸部13的上表面133顶起导致盖体30无法贴合在第一表面111上与绝缘件10盖合，此时，可以在第一通孔131的周向上盲调(转动盖体30)，直至注液部33不抵接在凸部13的上表面133，便可确认注液部33对准腔体15，此时，盖体30与绝缘件10稳定盖合并固定。
以上是本申请的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本申请的保护范围。

Claims (15)

  1. 一种端盖组件，应用于储能装置上，包括：
    绝缘件，包括第一本体和凸部，所述第一本体具有相背设置的第一表面和第二表面，所述第一本体包括底壁和侧壁，所述侧壁设置于所述底壁的外周缘，并朝背离所述第二表面的方向延伸，所述第一表面为所述侧壁的背离所述底壁的表面，所述凸部自所述底壁朝向所述第一表面凸起，所述凸部形成有第一通孔，所述底壁、所述侧壁和所述凸部共同形成腔体，所述腔体环绕所述凸部的至少一部分；
    盖体，盖设于所述第一表面，所述盖体包括第二本体和注液部，所述第二本体形成有第二通孔，所述第二通孔与所述第一通孔连通，所述注液部自所述第二本体朝所述凸部所在的一侧凸起，并延伸至所述腔体内，所述注液部与所述第二通孔间隔；
    极柱，穿设所述第二通孔和所述第一通孔，并至少部分露出于所述盖体。
  2. 根据权利要求1所述的端盖组件，其中，沿所述第一通孔的轴线方向上，所述凸部的高度等于所述侧壁的高度。
  3. 根据权利要求1所述的端盖组件，其中，所述凸部的一端延伸至所述第一本体的外周缘，并与所述侧壁相连接。
  4. 根据权利要求1所述的端盖组件，其中，所述腔体包括连通的第一区域和第二区域，所述第一区域的底部形成有至少一个第一孔，所述第二区域的底部形成有至少一个第二孔，所述盖体还包括防爆阀部，所述防爆阀部与所述第二通孔间隔，所述防爆阀部与所述注液部间隔并位于所述第二通孔的相对两端，所述注液部与所述第一区域相对设置，所述防爆阀部与所述第二区域相对设置。
  5. 根据权利要求4所述的端盖组件，其中，所述第一孔的尺寸和所述第二孔的尺寸相同。
  6. 根据权利要求4所述的端盖组件，其中，所述第一区域的底部形成有多个第一孔，所述第二区域的底部形成有多个第二孔，所述多个第一孔的分布密度大于所述多个第二孔的分布密度。
  7. 根据权利要求4所述的端盖组件，其中，所述第一孔的尺寸大于所述第二孔的尺寸。
  8. 根据权利要求7所述的端盖组件，其中，所述第一孔的直径与所述第二孔的直径之间的差值D1满足：0.3mm≤D1≤1.0mm。
  9. 根据权利要求4所述的端盖组件，其中，所述第一区域的底部形成有多个第一孔，所述第二区域的底部形成有多个第二孔，自所述第一区域至所述第二区域的方向上，所述多个第一孔的尺寸和所述多个第二孔的尺寸均依次减小，所述多个第一孔的尺寸大于所述多个第二孔的尺寸。
  10. 根据权利要求9所述的端盖组件，其中，尺寸最大的所述第一孔的直径与尺寸最小的所述第二孔的直径之间的差值D2满足：0.3mm≤D2≤1.0mm。
  11. 根据权利要求1所述的端盖组件，其中，所述绝缘件还包括容置槽，所述凸部的另一面形成有所述容置槽，沿所述第一通孔的轴线方向上，所述容置槽与所述凸部对应。
  12. 根据权利要求11所述的端盖组件，其中，所述容置槽形成有开口，所述端盖组件还包括转接件，所述转接件包括相连接的盘体部和延伸部，所述延伸部自所述开口伸入所述容置槽，所述盘体部遮挡所述容置槽。
  13. 根据权利要求12所述的端盖组件，其中，沿所述第一通孔的轴线方向上，所述绝缘件的投影面积大于所述盘体部的投影面积，且小于所述盖体的投影面积。
  14. 一种储能装置，包括壳体和如权利要求1至13中任一项所述的端盖组件，所述端盖组件安装于所述壳体的一侧。
  15. 一种用电设备，包括如权利要求14所述的储能装置，所述储能装置为所述用电设备供电。
PCT/CN2024/070158 2023-03-30 2024-01-02 端盖组件、储能装置及用电设备 WO2024198597A1 (zh)

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