WO2023201474A1 - 转接组件、电池单体、电池及用电装置 - Google Patents

转接组件、电池单体、电池及用电装置 Download PDF

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Publication number
WO2023201474A1
WO2023201474A1 PCT/CN2022/087445 CN2022087445W WO2023201474A1 WO 2023201474 A1 WO2023201474 A1 WO 2023201474A1 CN 2022087445 W CN2022087445 W CN 2022087445W WO 2023201474 A1 WO2023201474 A1 WO 2023201474A1
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WO
WIPO (PCT)
Prior art keywords
fuse
thickness direction
adapter assembly
embossing
connection
Prior art date
Application number
PCT/CN2022/087445
Other languages
English (en)
French (fr)
Inventor
李川
郭志君
雷育永
宋英俊
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/087445 priority Critical patent/WO2023201474A1/zh
Priority to CN202280035752.4A priority patent/CN117378088A/zh
Priority to EP22937714.8A priority patent/EP4395055A1/en
Publication of WO2023201474A1 publication Critical patent/WO2023201474A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • 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 an adapter component, a battery cell, a battery and an electrical device.
  • Batteries are widely used in electronic devices, such as mobile phones, laptops, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, etc.
  • Embodiments of the present application provide an adapter component, a battery cell, a battery and an electrical device.
  • the adapter component can be used in a battery cell to meet the electrical connection requirements between an electrode assembly and an electrode terminal, and can improve the performance of the battery cell. Safety performance.
  • an adapter assembly including: a current collection component having a terminal connection part, a fuse part, and a tab connection part, and the fuse part is connected between the terminal connection part and the tab connection part;
  • the insulating protection component is provided to cover the fuse part, and the insulating protection component is used to keep the relative position of the terminal connection part and the tab connection part fixed when the fuse part is blown; wherein, at least one surface of the fuse part in the thickness direction is formed with a first At least part of one of the mating part, the first mating part and the insulating protective component is protruding along the thickness direction and is embedded in the interior of the other.
  • the transfer assembly includes a current collecting part and an insulating protection part.
  • the current collecting part includes a terminal connection part, a fuse part and a lug connection part.
  • the terminal connection part can be used to connect with the electrode terminal, and the lug
  • the connection part can be used to electrically connect with the tab, and the fuse part is connected between the terminal connection part and the tab connection part and fuses when the current flowing through the current collecting component exceeds a preset threshold, causing the tab to be disconnected from the electrode terminal, Ensure the safety of battery cells.
  • the insulating protective component covers the fuse portion, so that when the fuse portion melts, the relative position of the terminal connection portion and the tab connection portion can be kept fixed to prevent the two from overlapping again and causing potential safety hazards to the battery cells.
  • a first fitting part on at least one surface of the fuse part in the thickness direction, at least part of one of the first fitting part and the insulating protective component is protruding along the thickness direction and embedded in the inside of the other. It can improve the sealing performance of the joint surface between the fuse part and the insulation protection component, resulting in better sealing effect and safer battery.
  • the first fitting portion is formed by removing part of the material of the fuse portion in the thickness direction.
  • the molding of the first fitting portion is facilitated. Moreover, the above arrangement will not increase the overflow area of the fuse part and ensure that when the current flowing through the current collecting component exceeds the preset threshold, the fuse part is guaranteed to be blown before the terminal connection part and the tab connection part.
  • the first matching part includes a plurality of first embossments, each first embossment is provided from a surface of the fuse part in the thickness direction to an interior recess of the fuse part, and the insulation protection component is at least partially embedded in the fuse part.
  • Each first embossed inside is provided from a surface of the fuse part in the thickness direction to an interior recess of the fuse part, and the insulation protection component is at least partially embedded in the fuse part.
  • the first mating part include a plurality of first embossings, and having the insulating protection component at least partially embedded in each first embossing, it is ensured that the first mating part and the insulating protection component are connected at multiple points, and the joint surface between the two is improved. Tightness performance, thereby improving the sealing performance requirements for the connection between the insulation protection component and the fuse part.
  • the depth of the first embossing is less than or equal to the thickness dimension of the fuse portion.
  • the first embossing By making the depth of the first embossing less than or equal to the thickness of the fuse part, that is, the first embossing can be in the form of a groove, or the form of the through hole can be diversified in structure, and the connection can be made according to the flow area requirements.
  • the sealing level needs to be adjusted.
  • the depth of the first embossing is smaller than the thickness dimension of the fuse part, and the first matching parts are formed on both surfaces of the fuse part in the thickness direction.
  • first matching parts are formed on both sides of the fuse part in the thickness direction, which can effectively improve the insulation protection of both sides of the fuse part in the thickness direction.
  • the sealing performance of the joint surface between parts is
  • the depth of the first embossing is less than half of the thickness dimension of the fuse portion.
  • the orthographic shape of the first embossing is circular, elliptical or polygonal.
  • the connection requirements with the insulating protective component can be ensured, and the sealing effect between the contact surfaces of the two can be optimized.
  • the aperture of the first embossing is reduced step by step or gradually.
  • the fuse part has a first connection area, a second connection area and a transition connection area.
  • the first connection area is connected to the terminal connection part
  • the second connection area is connected to the tab connection part
  • the transition connection area Connected between the first connection area and the second connection area, wherein the distribution density of the first embossing in the transition connection area is respectively smaller than the distribution density of the first embossing in the first connection area and the distribution density of the second connection area.
  • the value range of the depth a of the first embossing satisfies 0mm ⁇ a ⁇ 3mm.
  • the depth a of the first embossing adopt the above value range, it can not only ensure the sealing performance of the joint surface with the insulating protective component, but also facilitate the processing of the first embossing.
  • the terminal connection part is provided with a recessed part that is recessed along the thickness direction, and a second fitting part is formed on the bottom wall of the recessed part.
  • the second fitting part includes a plurality of second embossings, and each second embossing The flower is formed by an internal depression of the bottom wall in the thickness direction.
  • the adapter assembly provided by the embodiment of the present application can increase the roughness of the bottom wall of the recess by forming a second mating portion on the bottom wall of the recess.
  • the second mating portion includes a plurality of second embossings, so that when the terminals are connected When laser welding is performed between the terminal and the electrode terminal, the reflection of the laser is reduced, the utilization rate of laser energy is improved, and the welding demand is ensured.
  • the current collecting component is in the form of a plate-like structure as a whole.
  • the fuse part is provided with a notch penetrating along the thickness direction.
  • the fuse part is provided with a notch penetrating along the thickness direction.
  • the notch is used to reduce the size of the fuse part.
  • At least part of the flow area, the orthographic projection of the insulation protection component in the thickness direction covers the gap.
  • the current collecting component is in the form of a plate-like structure as a whole, which facilitates processing and molding and ensures the connection requirements with the electrode terminals and tabs.
  • the setting of the gap is conducive to reducing the overflow area of the corresponding area of the fuse part and improving the safety performance of the adapter assembly.
  • the orthographic projection of the insulation protection component in the thickness direction covers the gap, so that when the fuse part fuses at the position of the gap, the insulation protection component It can ensure that the relative positions of the remaining two sides of the fuse part remain unchanged, thereby meeting the requirement of keeping the relative position of the terminal connection part and the tab connection part fixed when the fuse part is blown.
  • an embodiment of the present application provides a battery cell, including: a casing; an electrode assembly disposed in the casing, the electrode assembly including a lug; and an end cover assembly closing the opening of the casing, and the end cover assembly includes Electrode terminal; like the above-mentioned adapter assembly, the tab connection part is used to connect to the tab, and the terminal connection part is used to connect to the electrode terminal.
  • an embodiment of the present application provides a battery, including the above-mentioned battery cell.
  • an electrical device including the above-mentioned battery.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is an exploded view of a battery provided by some embodiments of the present application.
  • Figure 3 is a schematic diagram of the exploded structure of a battery cell provided by some embodiments of the present application.
  • Figure 4 is an isometric view of an adapter assembly provided by some embodiments of the present application.
  • FIG. 5 is a top view of the adapter assembly provided by this application.
  • Figure 6 is a cross-sectional view along the A-A direction in Figure 5;
  • Figure 7 is a partial cross-sectional view of an adapter assembly provided by other embodiments of the present application.
  • Figure 8 is a partial cross-sectional view of an adapter assembly provided by some embodiments of the present application.
  • Figure 9 is a partial cross-sectional view of the current collecting component of the adapter assembly provided by some embodiments of the present application.
  • Figure 10 is a partial cross-sectional view of the current collecting component of the adapter assembly provided by some embodiments of the present application.
  • Figure 11 is a top view of an adapter assembly provided by some embodiments of the present application.
  • Figure 12 is an isometric view of an adapter assembly provided by some embodiments of the present application.
  • Figure 13 is a top view of an adapter assembly provided by some embodiments of the present application.
  • 22-end cover assembly 22-end cover assembly; 221-cover plate; 222-electrode terminal;
  • connection part 2411-terminal connection part; 2411a-recessed part; 2411b-second mating part; 2411c-second embossing;
  • 2412-Fusing part 2412a-First connection area; 2412b-Transition connection area; 2412c-Second connection area; 2412d-Notch;
  • a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in direct contact. Indirect contact through intermediaries.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc.
  • the embodiments of the present application are not limited to this.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly, electrolyte, end cap assembly and adapter assembly.
  • the electrode assembly includes a positive electrode piece, a negative electrode piece and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector includes a positive electrode current collecting part and a positive electrode tab connected to the positive electrode current collecting part.
  • the positive electrode current collecting part The positive electrode active material layer is coated, and the positive electrode tab is not coated with the positive electrode active material layer.
  • the material of the cathode current collector can be aluminum, and the cathode active material layer includes cathode active materials.
  • the cathode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode current collecting part and a negative electrode tab connected to the negative electrode current collecting part, and the negative electrode current collecting part The negative electrode active material layer is coated, and the negative electrode tab is not coated with the negative electrode active material layer.
  • the negative electrode current collector may be made of copper, and the negative electrode active material layer may include a negative electrode active material.
  • the negative electrode active material may be carbon or silicon.
  • the material of the isolator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the end cap assembly includes an electrode terminal, and the adapter assembly is used to electrically connect the tabs of the electrode assembly to the electrode terminal.
  • the joint surfaces between the components are prone to warp and create gaps, which affects the reliability of the connection between the insulation protection component and the current collecting component, as well as the tightness of the insulation protection component wrapping the fuse part, causing the insulation protection components of the transfer assembly to be in contact with the current collecting component.
  • connection performance and sealing performance between components are poor, causing the relative displacement or even falling off of the insulation protection component and the fuse part, or causing the electrolyte to enter the fuse part after the transfer component is fused, causing the terminal connection part and the tab to be connected.
  • the internal electrical connection is re-established, which brings safety risks to the battery cells.
  • the transfer assembly includes a current collecting component and an insulation protection component.
  • the current collecting component has terminal connections. , the fuse part and the tab connection part.
  • the fuse part is connected between the terminal connection part and the tab connection part.
  • the fuse part is used to fuse when the current flowing through the current collecting component exceeds the preset threshold; the insulation protection component is covered
  • the fuse part is provided, and the insulation protection component is used to keep the relative position of the terminal connection part and the tab connection part fixed when the fuse part is blown.
  • a first fitting part is formed on at least one surface of the fuse part in the thickness direction, and at least part of one of the first fitting part and the insulating protective component protrudes along the thickness direction and is embedded in the interior of the other.
  • the fuse part is connected between the terminal connection part and the tab connection part and fuses when the current flowing through the current collecting component exceeds a preset threshold, causing the tabs to be disconnected from the electrode terminals to ensure that the battery cells body safety.
  • the insulating protective component covers the fuse portion, so that when the fuse portion melts, the relative position of the terminal connection portion and the tab connection portion can be kept fixed to prevent the two from overlapping again and causing potential safety hazards to the battery cells.
  • a first fitting part on at least one surface of the fuse part in the thickness direction, at least part of one of the first fitting part and the insulating protective component is protruding along the thickness direction and embedded in the inside of the other. It can improve the tightness of the connection surface between the fuse part and the insulation protection component, making the battery safer.
  • the adapter assembly described in the embodiments of this application is suitable for battery cells, batteries, and electrical devices using batteries.
  • Electrical devices can be vehicles, cell phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is an exploded view of the battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 .
  • the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first part 11 and a second part 12 , the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a space for accommodating the battery cells 20 accommodation space 13.
  • the second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure.
  • the first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define a receiving space.
  • the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12 .
  • the box 10 formed by the first part 11 and the second part 12 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • the battery 100 there may be multiple battery cells, and the multiple battery cells may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, parallel, or mixed together, and then the whole composed of multiple battery cells can be accommodated in the box 10 .
  • the battery 100 can also be in the form of a battery module in which multiple battery cells are first connected in series, parallel or mixed, and then the multiple battery modules are connected in series, parallel or mixed to form a whole, and are accommodated in the box 10 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells.
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • FIG. 3 is an exploded structural diagram of a battery cell 20 provided in some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit that constitutes the battery.
  • the battery cell 20 includes a casing 21 , an electrode assembly 23 , an end cover assembly 22 and an adapter assembly 24 .
  • the housing 21 is a component used to cooperate with the end cap assembly 22 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 23 , electrolyte, and other components.
  • the housing 21 and the end cover assembly 22 may be independent components, and an opening may be provided on the housing 21 , and the end cover assembly 22 covers the opening at the opening to form the internal environment of the battery cell 20 .
  • the end cover assembly 22 and the housing 21 can also be integrated. Specifically, the end cover assembly 22 and the housing 21 can form a common connection surface before other components are put into the housing. When the housing 21 needs to be packaged, When inside, the end cover assembly 22 is then closed to cover the housing 21 .
  • the housing 21 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 21 can be determined according to the specific shape and size of the electrode assembly 23 .
  • the housing 21 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiments of the present application.
  • the end cover assembly 22 refers to a component that covers the opening of the housing 21 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap assembly 22 may be adapted to the shape of the housing 21 to fit the housing 21 .
  • the end cap assembly 22 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap assembly 22 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have better performance. With high structural strength, safety performance can also be improved.
  • the end cap assembly 22 may include functional components such as electrode terminals 222, cover plates 221, etc.
  • the electrode terminal 222 may be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cap assembly 22 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating member 26 may also be provided inside the end cap assembly 22. The insulating member 26 may be used to isolate the electrode assembly 23 and the end cap assembly 22 in the housing 21 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber, etc.
  • the electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 23 may be contained within the housing 21 .
  • the electrode assembly 23 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly 23
  • the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material constitute the tabs 231 respectively.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body.
  • the positive active material and the negative active material react with the electrolyte, and the tabs 231 are connected to the electrode terminals 222 to form a current loop.
  • the adapter assembly 24 is used to connect the tabs 231 of the electrode assembly 23 with the electrode terminals 222 of the end cap assembly 22 to form a current loop.
  • the current flowing through the electrode assembly 23 exceeds a preset value. It can fuse at the threshold to ensure the safety of the battery.
  • Figure 4 is an isometric view of the adapter assembly 24 provided in some embodiments of the present application.
  • Figure 5 is a top view of the adapter assembly 24 provided in some embodiments of the present application.
  • Figure 6 is a diagram of Figure 5 Cross-sectional view along the A-A direction.
  • the adapter assembly 24 includes a current collecting component 241 and an insulation protection component 242.
  • the current collecting component 241 has a terminal connection part 2411, a fuse part 2412 and a tab connection part 2413.
  • the fuse part 2412 is connected to the terminal connection part 2411 and the tab connection part 2413.
  • the fuse part 2412 is used to fuse when the current flowing through the current collecting component 241 exceeds a preset threshold and/or when the temperature is too high.
  • the insulation protection component 242 is provided to cover the fuse part 2412, and the insulation protection component 242 is used to keep the relative position of the terminal connection part 2411 and the tab connection part 2413 fixed when the fuse part 2412 is blown.
  • the fuse part 2412 is formed with a first fitting part 2414 on at least one surface in the thickness direction the interior of the person.
  • the terminal connection part 2411 may be used to connect with the electrode terminal 222 of the end cap assembly 22
  • the tab connection part 2413 may be used to connect with the tab 231 of the electrode assembly 23 .
  • the fuse part 2412 is connected between the terminal connection part 2411 and the tab connection part 2413.
  • the fuse part 2412, the terminal connection part 2411 and the tab connection part 2413 may be an integral structure.
  • the flow area of at least part of the fuse portion 2412 may be smaller than the flow area of the terminal connection portion 2411 and the tab connection portion 2413 . So that the fuse part 2412 is blown when the current flowing through the current collecting component 241 exceeds the preset threshold range.
  • the fuse part may be provided with a notch on one side of its width direction, or may be provided with notches on both sides of its width direction, or one or more through holes may be provided in the area between the two sides in the width direction, so as to
  • the flow area of at least part of the fuse portion is smaller than the flow area of the terminal connection portion 2411 and the tab connection portion 2413 .
  • the width direction of the fuse portion is perpendicular to the thickness direction X.
  • the preset threshold range is not limited to a specific value, and can be set according to the safety level of the battery cell 20 applied to the adapter component 24.
  • the arrangement of the insulating protection component 242 covering the fuse portion 2412 can be understood to mean that the fuse portion 2412 is surrounded by the insulating protection component 242 , and the fuse portion 2412 can be located inside the insulating protection component 242 .
  • the insulation protection component 242 is used to keep the relative position of the terminal connection part 2411 and the tab connection part 2413 fixed when the fuse part 2412 is blown. It can be understood that when the current flowing through the current collecting component 241 exceeds the preset threshold, The fuse part 2412 is fused and divided into two parts, one part is connected to the terminal connection part 2411 and the other part is connected to the tab connection part 2413. Since the two parts after the fuse part 2412 is melted are located in the insulating protection component 242, even if the fuse part 2412 is fused, the positions of the two separated parts within the insulating protection part 242 remain unchanged, thereby making the terminal connection part 2411 And the relative position of the tab connection portion 2413 remains unchanged.
  • the first fitting portion 2414 formed on at least one surface of the fuse portion 2412 in the thickness direction is protrudingly provided and embedded inside the other.
  • the first fitting portion 2414 can be configured to protrude at least partially along the thickness direction inside the fitting portion 2414.
  • the terminal connection part 2411 can be used to connect to the electrode terminal 222
  • the tab connection part 2413 can be used to electrically connect to the tab 231
  • the fuse part 2412 is connected between the terminal connection part 2411 and the pole.
  • the lug connecting parts 2413 and when the current flowing through the current collecting component 241 exceeds the preset threshold the lug 231 is disconnected from the electrode terminal 222 to ensure the safety of the battery cell 20 .
  • the insulating protection component 242 covers the fuse portion 2412 so that when the fuse portion 2412 melts, the relative positions of the terminal connection portion 2411 and the tab connection portion 2413 can be kept fixed to prevent the two from overlapping the battery cell 20 again. Bring safety risks.
  • first fitting portion 2414 on at least one surface of the fuse portion 2412 in the thickness direction
  • the inside of the other one can improve the sealing performance of the connection joint surface between the fuse part 2412 and the insulating protection component 242 even when the battery cell 20 where the adapter assembly 24 is located is under pressure or during transportation, so that even when the fuse is When the fuse portion 2412 is fused, the sealing performance with the insulating protection component 242 can be ensured, and the remaining portion of the fuse portion 2412 after the fuse is prevented from being reconnected due to entry of external substances.
  • the matching relationship between the first matching portion 2414 and one of the insulating protection components 242 is at least partially protruding along the thickness direction
  • the connection strength between each part and the insulating protection component 242 avoids changes in the relative position with the insulating protection component 242, thereby effectively preventing the remaining parts from being re-overlapping after the fuse part 2412 is blown, and improving the safety performance of the battery cell 20.
  • the first fitting portion 2414 is formed by removing part of the material of the fuse portion 2412 in the thickness direction X.
  • Removal of part of the material can be understood as removing part of the material on the fuse part 2412 along the thickness direction
  • the first fitting part 2414 may be in the shape of a groove smaller than the thickness of the fuse part 2412 , or may be in the shape of a hole equal to the thickness of the fuse part 2412 .
  • the adapter assembly 24 provided in the embodiment of the present application is formed by removing part of the material of the fuse portion 2412 from the fuse portion 2412 in the thickness direction Moreover, the above arrangement does not increase the current flow area of the fuse part 2412 and ensures that when the current flowing through the current collecting component 241 exceeds the preset threshold, the fuse part 2412 is guaranteed to be blown before the terminal connection part 2411 and the tab connection part 2413.
  • the first mating part 2414 includes a plurality of first embossments 2414a, and each first embossment 2414a is formed by a surface of the fuse part 2412 in the thickness direction X. It is recessed into the interior of the fuse portion 2412, and the insulation protection component 242 is at least partially embedded in each first embossment 2414a.
  • the number of the first embossings 2414a can be set according to the size specifications of the fuse portion 2412.
  • the first embossings 2414a can be grooves extending along the thickness direction X, or of course, can also be holes extending along the thickness direction X.
  • the insulating protection component 242 has protrusions matching the shape of each first embossing 2414a.
  • the protrusions of the insulating protection component 242 extend into the first embossing 2414a and are embedded in the first embossing 2414a.
  • the adapter assembly 24 ensures that the first mating portion 2414 includes a plurality of first embossings 2414a, and the insulating protective component 242 is at least partially embedded in each first embossing 2414a. 2414 realizes multi-point connection with the insulating protection component 242 to improve the tightness of the joint surface between the two, thereby improving the sealing performance requirements of the connection between the insulating protection component 242 and the fuse part 2412.
  • the depth of the first embossing 2414a is less than or equal to the thickness dimension of the fuse portion 2412.
  • Flower 2414a can be in the form of a through hole as a whole
  • FIG. 7 is a partial cross-sectional view of the adapter assembly 24 provided by other embodiments of the present application.
  • the first embossing 2414a may be in the form of a groove as a whole.
  • the adapter assembly 24 provided by the embodiment of the present application makes the depth of the first embossing 2414a less than or equal to the thickness of the fuse portion 2412, that is, the first embossing 2414a can be in the form of a groove or a through hole.
  • the form and structure are diverse and can be selected according to the flow area requirements and the connection sealing level requirements.
  • FIG. 8 is a partial cross-sectional view of the adapter assembly 24 provided by some embodiments of the present application.
  • the depth of the first embossing 2414a when the depth of the first embossing 2414a is smaller than the thickness of the fuse portion 2412 along the thickness direction 2412 can be arranged oppositely between the two first matching portions 2414 in the thickness direction X, and of course, can also be arranged staggered.
  • the adapter assembly 24 provided in the embodiment of the present application can form first mating portions 2414 on both sides of the fuse portion 2412 in the thickness direction X when the depth of the first embossing 2414a is smaller than the thickness of the fuse portion 2412 This effectively improves the sealing performance of the joint surfaces between the two sides of the fuse portion 2412 in the thickness direction X and the insulating protective component 242 .
  • the depth of the first embossing 2414a is less than half the thickness dimension of the fuse portion 2412. That is, the depth of the first embossing 2414a is less than half the thickness of the fuse portion 2412.
  • the orthographic shape of the first embossing 2414a may be circular.
  • the orthographic projection shape of the first embossment 2414a may be elliptical.
  • the orthographic shape of the first embossing 2414a may also be a rectangle, a pentagon, a hexagon, etc.
  • the connection requirement with the insulating protective component 242 can be ensured, and the sealing effect between the contact surfaces between the two can be optimized.
  • FIG. 9 is a partial cross-sectional view of the current collecting component 241 of the adapter assembly 24 provided in some embodiments of the present application.
  • FIG. 10 is a partial cross-sectional view of the adapter assembly 24 provided in some further embodiments of the present application. Partial cross-sectional view of flow component 241.
  • the hole diameter of the first embossing 2414a is reduced step by step or gradually along the thickness direction X.
  • the first embossing 2414a is a variable cross-section structure.
  • the aperture of the first embossing 2414a can be reduced section by section, that is, the first embossing 2414a can be stepped, and step surfaces can be formed between adjacent sections to limit insulation.
  • the portion of the protective component 242 that extends into the first embossing 2414a is separated from the first embossing 2414a.
  • the hole diameter of the first embossment 2414a can be gradually reduced.
  • the first embossing 2414a can be in a tapered shape, so that the small opening end faces the part of the insulating protection component 242 that extends into the first embossing 2414a, and the insulating protection component 242 can also be restricted from extending into the first embossing 2414a. The part is separated from the first embossing 2414a.
  • connection strength between the first embossing 2414a and the insulating protective component 242 can be improved, thereby ensuring the sealing performance of the joint surface between the two.
  • FIG. 11 is a top view of the adapter assembly 24 provided in some embodiments of the present application.
  • the fuse part 2412 has a first connection area 2412a, a second connection area 2412c and a transition connection area 2412b.
  • the first connection area 2412a is connected to the terminal connection part 2411, and the second connection area 2412c is connected to the tab.
  • the connecting portion 2413 is connected, and the transition connection area 2412b is connected between the first connection area 2412a and the second connection area 2412c, wherein the distribution density of the first embossing 2414a in the transition connection area 2412b is respectively smaller than that of the first embossing 2414a in the first connection area 2412b.
  • the distribution density of the connection area 2412a and the distribution density of the second connection area 2412c are respectively smaller than that of the first embossing 2414a in the first connection area 2412b.
  • first connection area 2412a, the transition area and the second connection area 2412c may be provided one after another.
  • the flow area of the transition area is smaller than the flow area of the first connection area 2412a and the flow area of the second connection area 2412c.
  • the distribution density of the first embossing 2414a in the transition connection area 2412b is respectively smaller than the distribution density of the first embossing 2414a in the first connection area 2412a and the distribution density of the second connection area 2412c. It can be understood that the number of first embossments 2414a distributed per unit area in the transition connection area 2412b is smaller than the number of first embossments 2414a distributed per unit area in the first connection area 2412a and the second connection area 2412c.
  • first embossings 2414a are distributed in the unit area of the transition connection area 2412b
  • 10 first embossments 2414a can be distributed in the unit area of the first connection area 2412a and the second connection area 2412c.
  • the distribution density is not limited to the above.
  • the distribution density can be specifically set according to the size of the adapter component 24, the connection strength requirements between the current collecting component 241 and the insulation protection component 242, etc.
  • the adapter assembly 24 provided by the embodiment of the present application makes the distribution density of the first embossing 2414a in the transitional connection area 2412b smaller than the distribution density of the first embossing 2414a in the first connection area 2412a and the distribution density of the second connection area 2412c respectively. density.
  • the sealing performance of the joint surface between the insulation protection component 242 and the fuse part 2412 in the first connection area 2412a and the second connection area 2412c can be increased.
  • the value range of the depth a of the first embossing 2414a satisfies 0mm ⁇ a ⁇ 3mm.
  • the depth a of the first embossing 2414a can be any value between 0 mm and 3 mm, including the 3 mm end value.
  • the depth of the first embossing 2414a can be any value among 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, and 3mm.
  • the adapter assembly 24 provided in the embodiment of the present application, by making the depth a of the first embossing 2414a adopt the above value range, can not only ensure the sealing performance of the joint surface with the insulating protective component 242, but also facilitate the first embossing. Processing of flower 2414a.
  • FIG. 12 is an isometric view of the adapter assembly 24 provided in some embodiments of the present application.
  • the terminal connecting part 2411 is provided with a recess 2411a that is recessed along the thickness direction
  • the flowers 2411c and each second embossing 2411c are formed by the bottom wall being recessed toward the inside of the bottom wall in the thickness direction X.
  • the concave portion 2411a is used to cooperate with the electrode terminal 222, and the shape of the concave portion 2411a can match the shape of the electrode terminal 222 to ensure the electrical connection requirements with the electrode terminal 222.
  • each second embossing 2411c in the thickness direction X may be circular, elliptical or polygonal.
  • the thickness of the second embossing 2411c may be smaller than the thickness of the bottom wall of the recess 2411a.
  • the adapter assembly 24 provided in the embodiment of the present application can increase the roughness of the bottom wall of the recess 2411a by forming a second fitting portion 2411b on the bottom wall of the recess 2411a.
  • the second fitting portion 2411b includes a plurality of second embossments 2411c. degree, so that when the terminal connection part 2411 is laser welded with the electrode terminal 222, the laser light is prevented from being reflected, the laser energy utilization rate is improved, and the welding demand is ensured.
  • the current collecting component 241 is in the form of a plate-shaped structure as a whole, and the fuse portion 2412 is provided with a notch 2412d penetrating along the thickness direction X.
  • the notch 2412d is used to make the fuse portion 2412
  • the flow area is smaller than the flow area of the terminal connection part 2411 and the tab connection part 2413, and the orthographic projection of the insulation protection component 242 in the thickness direction X covers the notch 2412d.
  • the fact that the current collecting component 241 is a plate-shaped structure as a whole can be understood to mean that most areas of the current collecting component 241 are plate-shaped, that is to say, the current collecting component 241 is generally a plate-shaped structure, which is allowed to have convex portions or concave portions.
  • the notch 2412d may be in the shape of a U-shaped groove with an opening.
  • the fuse part 2412 may be provided with a notch 2412d on one side in its width direction, or may be provided with notches 2412d on both sides of its width direction.
  • the flow area of the fuse part 2412, the terminal connection part 2411 and the tab connection part 2413 can be understood as the flow area of the fuse part 2412, the terminal connection part 2411 and the tab connection part 2413.
  • the cross-sectional area of the fuse part 2412 is the cross-sectional area of the terminal connecting part 2411 and the tab connecting part 2413 is the cross-sectional area.
  • the arrangement direction of the fuse part 2412, the terminal connection part 2411, and the tab connection part 2413 is perpendicular to the thickness direction X.
  • the notch 2412d may be specifically located in the transition connection area 2412b, so that the fuse part 2412 is at least at the position of the transition connection area 2412b.
  • the flow area is smaller than the flow surface of the terminal connection portion 2411 and the flow area of the tab connection portion 2413 .
  • the position where the notch 2412d is located in the fuse portion 2412 is located inside the insulating protection component 242, and the insulating protection component 242 is arranged surrounding the fuse portion 2412.
  • FIG. 13 is a top view of the adapter assembly 24 provided in some embodiments of the present application. It can be understood that the notch 2412d is not limited to a U-shaped groove shape, as shown in FIG. 13 , and in some embodiments, it may also be a closed hole shape.
  • the current collecting component 241 is in the form of a plate-like structure as a whole, which facilitates processing and molding and ensures the connection requirements with the electrode terminals 222 and the tabs 231 .
  • the setting of the gap 2412d is conducive to reducing the flow area corresponding to the fuse part 2412 and improving the safety performance of the adapter assembly 24.
  • the orthographic projection of the insulation protection component 242 in the thickness direction X covers the gap 2412d, so that when the fuse part 2412 is in the gap 2412d When the position is fused, the insulating protection component 242 can ensure that the relative positions of the remaining two sides of the fuse portion 2412 remain unchanged, thereby meeting the need to keep the relative positions of the terminal connecting portion 2411 and the tab connecting portion 2413 fixed when the fuse portion 2412 is fused.
  • the terminal connecting part 2411, the fuse part 2412, and the tab connecting part 2413 may be an integrated structure to ensure the connection strength between them.
  • the tab connecting part 2413 may also be two sheet-shaped units spaced apart and arranged in parallel, and the two sheet-shaped units are spaced apart and connected to the fuse part 2412 respectively. It can be an integral sheet structure, as long as it can meet the connection requirements with the tab 231 .
  • the present application also provides a battery cell 20.
  • the battery cell 20 includes a case 21, an electrode assembly 23, an end cap assembly 22, and an adapter assembly 24 of any of the above solutions.
  • the electrode assembly 23 is disposed in the housing 21 , and the electrode assembly 23 includes tabs 231 .
  • the end cover assembly 22 is disposed to close the opening of the housing 21 .
  • the end cover assembly 22 includes an electrode terminal 222 , a tab connecting portion 2413 for connecting to the tab 231 , and a terminal connecting portion 2411 for connecting to the electrode terminal 222 .
  • the battery cell 20 provided in the embodiment of the present application includes the adapter assembly 24 provided in the above embodiments, has good sealing performance between the current collecting component 241 and the insulating protection component 242, and the overall safety performance of the battery cell 20 is high. .
  • the present application also provides a battery, including the battery cell 20 described in any of the above solutions.
  • the present application also provides an electrical device, including the battery described in any of the above solutions, and the battery is used to provide electrical energy for the electrical device.
  • the powered device can be any of the aforementioned devices or systems that use batteries.

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Abstract

本申请涉及一种转接组件、电池单体、电池及用电装置，转接组件包括：集流部件，具有端子连接部、熔断部以及极耳连接部，熔断部连接于端子连接部与极耳连接部之间；绝缘防护部件，包覆熔断部设置，绝缘防护部件用于在熔断部熔断时保持端子连接部与极耳连接部的相对位置固定；其中，熔断部至少在厚度方向上的一个表面形成有第一配合部，第一配合部与绝缘防护部件中的一者至少部分沿厚度方向凸出设置并镶嵌于另一者的内部。本申请能够用于电池单体实现电极组件与电极端子之间的电连接需求，并且能够提高电池单体的安全性能。

Description

转接组件、电池单体、电池及用电装置 技术领域
本申请涉及电池技术领域，特别是涉及一种转接组件、电池单体、电池及用电装置。
背景技术
电池广泛用于电子设备，例如手机、笔记本电脑、电瓶车、电动汽车、电动飞机、电动轮船、电动玩具汽车、电动玩具轮船、电动玩具飞机和电动工具等等。
在电池技术的发展中，除了提高电池的性能外，如何保证电池的各电池单体的电极组件与电极端子的连接安全也是一个亟待解决的问题。
发明内容
本申请实施例提供一种转接组件、电池单体、电池及用电装置，转接组件能够用于电池单体实现电极组件与电极端子之间的电连接需求，并且能够提高电池单体的安全性能。
一方面，根据本申请实施例提出了一种转接组件，包括：集流部件，具有端子连接部、熔断部以及极耳连接部，熔断部连接于端子连接部与极耳连接部之间；绝缘防护部件，包覆熔断部设置，绝缘防护部件用于在熔断部熔断时保持端子连接部与极耳连接部的相对位置固定；其中，熔断部至少在厚度方向上的一个表面形成有第一配合部，第一配合部与绝缘防护部件中的一者至少部分沿厚度方向凸出设置并镶嵌于另一者的内部。
本申请实施例的技术方案中，转接组件包括集流部件以及绝缘防护部件，集流部件包括端子连接部、熔断部以及极耳连接部，端子连接部可以用于与电极端子连接，极耳连接部可以用于与极耳电连接，熔断部连接在端子连接部与极耳连接部之间且当流经集流部件的电流超过预设阈值时熔断，使得极耳与电极端子断开，保证电池单体的安全。并且，绝缘防护部件包覆熔断部设置，使得当熔断部熔断时，能够保证保持端子连接部与极耳连接部的相对位置固定，避免二者再次搭接对电池单体带来安全隐患。同时，通过将熔断部至少在厚度方向上的一个表面形成有第一配合部，第一配合部与绝缘防护部件中的一者至少部分沿厚度方向凸出设置并镶嵌于另一者的内部，能够提高熔断部与绝缘防护部件之间连接接合面的密封性能，密封效果更好，电池更加安全。
根据本申请实施例的一个方面，第一配合部由熔断部在厚度方向上去除部分材料形成。
通过使得第一配合部由熔断部在厚度方向上去除部分材料形成，利于第一配合部的成型。并且，上述设置不会增加熔断部的过流面积，保证流经集流部件的电流超过预设阈值时，熔断部保证先于端子连接部以及极耳连接部熔断。
根据本申请实施例的一个方面，第一配合部包括多个第一压花，各第一压花由熔断部在厚度方向上的表面向熔断部的内部凹陷设置，绝缘防护部件至少部分镶嵌于各第一压花内。
通过使得第一配合部包括多个第一压花，并使得绝缘防护部件至少部分镶嵌于各第一压花内，保证第一配合部与绝缘防护部件实现多点连接，提高二者接合面的紧密性能，进而提高绝缘防护部件与熔断部之间连接的密封性能要求。
根据本申请实施例的一个方面，沿厚度方向，第一压花的深度小于或者等于熔断部的厚度尺寸。
通过使得第一压花的深度小于或者等于熔断部的厚度尺寸，即，使得第一压花可以是凹槽形式，也可以使得通孔的形式，结构多样化，可以根据过流面积需求，连接密封等级需求进行调节。
根据本申请实施例的一个方面，沿厚度方向，第一压花的深度小于熔断部的厚度尺寸，熔断部在厚度方向的两个表面均形成有第一配合部。
通过使得第一压花的深度小于熔断部的厚度尺寸时，在熔断部的厚度方向上的两侧均形成第一配合部，能够有效的提高熔断部在厚度方向上的两侧各自与绝缘保护件之间接合面的密封性能。
根据本申请实施例的一个方面，沿厚度方向，第一压花的深度小于熔断部的厚度尺寸的二分之一。
通过上述设置，使得当熔断部在厚度方向上的两侧均形成有第一配合部时，即使两个第一配合部在厚度方向上相对设置，可以不将熔断部贯穿，利于两侧均设置有第一配合部的转接组件的成型。
根据本申请实施例的一个方面，沿厚度方向，第一压花的正投影形状呈圆形、椭圆形或者多边形。
通过使得第一压花采用上述结构形状，能够保证与绝缘防护部件之间之间连接需求，优化二者接触面之间的密封效果。
根据本申请实施例的一个方面，在厚度方向，沿从所述熔断部的表面指向所述熔断部内部的方向，第一压花的孔径逐段减小或者逐渐减小。
根据本申请实施例的一个方面，熔断部具有第一连接区、第二连接区以及过渡连接区，第一连接区与端子连接部连接，第二连接区与极耳连接部连接，过渡连接区 连接于第一连接区以及第二连接区之间，其中，第一压花在过渡连接区的分布密度分别小于第一压花在第一连接区的分布密度以及第二连接区的分布密度。
通过使得第一压花在过渡连接区的分布密度分别小于第一压花在第一连接区的分布密度以及第二连接区的分布密度，能够增加绝缘防护部件与熔断部在第一连接区以及第二连接区接合面的密封性能。
根据本申请实施例的一个方面，在厚度方向，第一压花的深度a的取值范围满足0mm＜a≤3mm。
通过使得第一压花的深度a采用上述取值范围，既能够保证与绝缘防护部件之间接合面的密封性能，同时还能够利于第一压花的加工。
根据本申请实施例的一个方面，端子连接部上设置有沿厚度方向凹陷的凹部，凹部的底壁上形成有第二配合部，第二配合部包括多个第二压花，各第二压花由底壁在厚度方向底壁的内部凹陷形成。
本申请实施例提供的转接组件，通过在凹部的底壁上形成有第二配合部，第二配合部包括多个第二压花，能够增加凹部的底壁的粗糙度，使得当端子连接部在与电极端子进行激光焊接时，减小激光被反射，提高激光能量利用率，保证焊接需求。
根据本申请实施例的一个方面，集流部件整体呈板状结构体，熔断部上设置有沿厚度方向贯穿的缺口，熔断部上设置有沿厚度方向贯穿的缺口，缺口用于减小熔断部至少部分段的过流面积，绝缘防护部件在厚度方向的正投影覆盖缺口。
本申请实施例提供的转接组件，集流部件整体呈板状结构体，利于加工成型，保证与电极端子以及极耳之间的连接需求。缺口的设置利于减小熔断部对应区域的过流面积，提高转接组件的安全性能，绝缘防护部件在厚度方向的正投影覆盖缺口，使得当熔断部在缺口的位置发生熔断时，绝缘防护部件能够保证熔断部剩余两侧部分的相对位置保持不变，进而满足当熔断部熔断时保持端子连接部与极耳连接部的相对位置固定需求。
另一个方面，根据本申请实施例提供一种电池单体，包括：壳体；电极组件，设置于壳体内，电极组件包括极耳；端盖组件，封闭壳体的开口设置，端盖组件包括电极端子；如上述的转接组件，极耳连接部用于与极耳连接，端子连接部用于与电极端子连接。
又一个方面，根据本申请实施例提供一种电池，包括上述的电池单体。
再一个方面，根据本申请实施例提供一种用电装置，包括如上述的电池。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的***图；
图3为本申请一些实施例提供的电池单体的分解结构示意图；
图4为本申请一些实施例提供的转接组件的轴测图；
图5为本申请一些时候说了提供的转接组件的俯视图；
图6为图5中沿A-A方向的剖示图；
图7为本申请另一些实施例提供的转接组件的局部剖视图；
图8为本申请又一些实施例提供的转接组件的局部剖视图；
图9为本申请又一些实施例提供的转接组件的集流部件的局部剖视图；
图10为本申请再一些实施例提供的转接组件的集流部件的局部剖视图；
图11为本申请再一些实施例提供的转接组件的俯视图；
图12为本申请再一些实施例提供的转接组件的轴测图；
图13为本申请再一些实施例提供的转接组件的俯视图。
具体实施方式中的附图标号如下：
1000-车辆；
100-电池；200-控制器；300-马达；
10-箱体；11-第一部分；12-第二部分；13-容纳空间；
20-电池单体；
21-壳体；
22-端盖组件；221-盖板；222-电极端子；
23-电极组件；231-极耳；
24-转接组件；
241-集流部件；
2411-端子连接部；2411a-凹部；2411b-第二配合部；2411c-第二压花；
2412-熔断部；2412a-第一连接区；2412b-过渡连接区；2412c-第二连接区；2412d-缺口；
2413-极耳连接部；
2414-第一配合部；2414a-第一压花；
242-绝缘防护部件；
X-厚度方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
需要注意的是，除非另有说明，本申请实施例使用的技术术语或者科学术语应当为本申请实施例所属领域技术人员所理解的通常意义。
在本申请实施例的描述中，技术术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
此外，技术术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，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实施例中的具体含义。
在本申请实施例的描述中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，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”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源***，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
本申请中，电池单体可以包括锂离子二次电池单体、锂离子一次电池单体、锂 硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件、电解液、端盖组件以及转接组件，电极组件包括正极极片、负极极片和隔离件。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极集流部和连接于正极集流部的正极极耳，正极集流部涂覆有正极活性物质层，正极极耳未涂覆正极活性物质层。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质层包括正极活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极集流部和连接于负极集流部的负极极耳，负极集流部涂覆有负极活性物质层，负极极耳未涂覆负极活性物质层。负极集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。隔离件的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
端盖组件包括电极端子，转接组件用于将电极组件的极耳与电极端子电连接。本申请人注意到，转接组件在流经的电流超过预设阈值发生熔断后，存在绝缘防护部件与集流部件之间连接不可靠的问题，给电池单体带来了安全隐患。
为了缓解转接组件在发生熔断后绝缘性差的问题，申请人做了进一步深入研究发现，电池单体在运输或者受压的过程中，转接组件绝缘防护部件易发生变形，使得其与集流部件之间的结合面易翘曲产生缝隙，影响绝缘防护部件与集流部件之间连接的可靠性，以及绝缘防护部件对熔断部包裹的紧密性，使得转接组件的绝缘防护部件与集流部件之间的连接性能以及密封性能较差，使得绝缘防护部件与熔断部发生相对位移甚至脱落，或使得转接组件在发生熔断后，电解液进入熔断部中，使得端子连接部和极耳连接部的电连接重新建立，给电池单体带来了安全隐患。
基于以上考虑，为了解决转接组件连接可靠性、密封性差的问题，发明人经过深入研究，设计了一种转接组件，转接组件包括集流部件以及绝缘防护部件，集流部件具有端子连接部、熔断部以及极耳连接部，熔断部连接于端子连接部与极耳连接部之间，熔断部用于在流经集流部件的电流超过预设阈值时熔断；绝缘防护部件，包覆熔断部设置，绝缘防护部件用于在熔断部熔断时保持端子连接部与极耳连接部的相对 位置固定。熔断部至少在厚度方向上的一个表面形成有第一配合部，第一配合部与绝缘防护部件中的一者至少部分沿厚度方向凸出设置并镶嵌于另一者的内部。
在这样的转接组件中，熔断部连接在端子连接部与极耳连接部之间且当流经集流部件的电流超过预设阈值时熔断，使得极耳与电极端子断开，保证电池单体的安全。并且，绝缘防护部件包覆熔断部设置，使得当熔断部熔断时，能够保证保持端子连接部与极耳连接部的相对位置固定，避免二者再次搭接对电池单体带来安全隐患。同时，通过将熔断部至少在厚度方向上的一个表面形成有第一配合部，第一配合部与绝缘防护部件中的一者至少部分沿厚度方向凸出设置并镶嵌于另一者的内部，能够提高熔断部与绝缘防护部件之间连接接合面的连接紧密性，使得电池更加安全。
本申请实施例描述的转接组件适用于电池单体、电池以及使用电池的用电装置。
用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的电池和用电设备，还可以适用于所有包括箱体的电池以及使用电池的用电设备，但为描述简洁，下述实施例均以电动车辆为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2，图2为本申请一些实施例提供的电池100的***图。电池100包括箱体10和电池单体20，电池单体20容纳于箱体10内。其中，箱体10用于为电池 单体20提供容纳空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体20的容纳空间13。第二部分12可以为一端开口的空心结构，第一部分11可以为板状结构，第一部分11盖合于第二部分12的开口侧，以使第一部分11与第二部分12共同限定出容纳空间13。第一部分11和第二部分12也可以是均为一侧开口的空心结构，第一部分11的开口侧盖合于第二部分12的开口侧。当然，第一部分11和第二部分12形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体可以是多个，多个电池单体之间可串联或并联或混联，混联是指多个电池单体中既有串联又有并联。多个电池单体之间可直接串联或并联或混联在一起，再将多个电池单体构成的整体容纳于箱体10内。当然，电池100也可以是多个电池单体先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体之间的电连接。
其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3，图3为本申请一些实施例提供的电池单体20的分解结构示意图。电池单体20是指组成电池的最小单元。电池单体20包括有壳体21、电极组件23、端盖组件22以及转接组件24。
壳体21是用于配合端盖组件22以形成电池单体20的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件23、电解液以及其他部件。壳体21和端盖组件22可以是独立的部件，可以于壳体21上设置开口，通过在开口处使端盖组件22盖合开口以形成电池单体20的内部环境。不限地，也可以使端盖组件22和壳体21一体化，具体地，端盖组件22和壳体21可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体21的内部时，再使端盖组件22盖合壳体21。壳体21可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体21的形状可以根据电极组件23的具体形状和尺寸大小来确定。壳体21的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
端盖组件22是指盖合于壳体21的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖组件22的形状可以与壳体21的形状相适应以配合壳体21。可选地，端盖组件22可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖组件22在受挤压碰撞时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性能也可以有所提高。端盖组件22上可以包括有如电极端子222、盖板 221等的功能性部件。电极端子222可以用于与电极组件23电连接，以用于输出或输入电池单体20的电能。端盖组件22的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在端盖组件22的内侧还可以设置有绝缘件26，绝缘件26可以用于隔离壳体21内的电极组件23与端盖组件22，以降低短路的风险。示例性的，绝缘件可以是塑料、橡胶等。
电极组件23是电池单体20中发生电化学反应的部件。壳体21内可以包含一个或更多个电极组件23。电极组件23主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件23的主体部，正极片和负极片不具有活性物质的部分各自构成极耳231。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳231连接电极端子222以形成电流回路。
转接组件24用于将电极组件23的极耳231与端盖组件22的电极端子222连接以形成电流回路，且当电池单体20发生断路当现象使得流经电极组件23的电流超过预设阈值时能够熔断，保证电池的安全。
请参照图4至图6，图4为本申请一些实施例提供的转接组件24的轴测图，图5为本申请一些时候说了提供的转接组件24的俯视图，图6为图5中沿A-A方向的剖示图。
转接组件24包括集流部件241以及绝缘防护部件242，集流部件241具有端子连接部2411、熔断部2412以及极耳连接部2413，熔断部2412连接于端子连接部2411与极耳连接部2413之间，熔断部2412用于在流经集流部件241的电流超过预设阈值时和/或温度过高时熔断。绝缘防护部件242包覆熔断部2412设置，绝缘防护部件242用于在熔断部2412熔断时保持端子连接部2411与极耳连接部2413的相对位置固定。其中，熔断部2412至少在厚度方向X上的一个表面形成有第一配合部2414，第一配合部2414与绝缘防护部件242中的一者至少部分沿厚度方向X凸出设置并镶嵌于另一者的内部。
可选地，端子连接部2411可以用于与端盖组件22的电极端子222连接，极耳连接部2413可以用于与电极组件23的极耳231连接。
可选地，熔断部2412连接于端子连接部2411以及极耳连接部2413之间，熔断部2412与端子连接部2411以及极耳连接部2413之间可以为一体式结构。
可选地，熔断部2412至少部分区域的过流面积可以小于端子连接部2411的过流面积以及极耳连接部2413的过流面积。以使得熔断部2412在流经集流部件241的电流超过预设阈值范围时熔断。
可选地，可以使得熔断部在自身宽度方向的一侧设置缺口，或者在自身宽度方 向的两侧设置缺口，或者在宽度方向上两侧之间的区域设置一个或者两个以上贯通孔，以使得熔断部至少部分区域的过流面积小于端子连接部2411的过流面积以及极耳连接部2413的过流面积。可选地，熔断部得宽度方向与厚度方向X相垂直。
可选地，预设的阈值范围不做具体数值限定，具体可以根据转接组件24所应用电池单体20的安全等级进行设置，
可选地，绝缘防护部件242包覆熔断部2412设置可以理解为熔断部2412被绝缘防护部件242包围，熔断部2412可以位于绝缘防护部件242的内部。
可选地，绝缘防护部件242用于在熔断部2412熔断时保持端子连接部2411与极耳连接部2413的相对位置固定可以理解为，当流经集流部件241的电流超过预设阈值时，熔断部2412发生熔断分隔成两个部分，其中一个部分与端子连接部2411连接且另一个部分与极耳连接部2413连接。由于熔断部2412熔断后的两个部分位于绝缘防护部件242内，因此，即使熔断部2412发生熔断，分隔形成的两个部分在绝缘防护部件242内的位置保持不变，进而使得端子连接部2411以及极耳连接部2413的相对位置保持不变。
可选地，熔断部2412至少在厚度方向X上的一个表面形成的第一配合部2414可以为凸起，也可以为凹陷，第一配合部2414与绝缘防护部件242中的一者至少部分沿厚度方向X凸出设置并镶嵌于另一者的内部。可以使得第一配合部2414可以至少部分沿厚度方向X凸出设置并镶嵌于绝缘防护部件242的内部，当然，也可以使得绝缘防护部件242至少部分沿厚度方向X凸出设置并镶嵌于第一配合部2414的内部。
本申请实施例提供的转接组件24，端子连接部2411可以用于与电极端子222连接，极耳连接部2413可以用于与极耳231电连接，熔断部2412连接在端子连接部2411与极耳连接部2413之间且当流经集流部件241的电流超过预设阈值时熔断，使得极耳231与电极端子222断开，保证电池单体20的安全。并且，绝缘防护部件242包覆熔断部2412设置，使得当熔断部2412熔断时，能够保证保持端子连接部2411与极耳连接部2413的相对位置固定，避免二者再次搭接对电池单体20带来安全隐患。同时，通过将熔断部2412至少在厚度方向X上的一个表面形成有第一配合部2414，第一配合部2414与绝缘防护部件242中的一者至少部分沿厚度方向X凸出设置并镶嵌于另一者的内部，使得转接组件24所在的电池单体20即使在受压或者运输的过程中，能够提高熔断部2412与绝缘防护部件242之间连接接合面的密封性能，使得即使当熔断部2412发生熔断时，能够保证与绝缘防护部件242之间的密封性能，避免外界物质进入导致熔断后的熔断部2412剩余部分重新搭接。
并且，第一配合部2414与绝缘防护部件242中的一者至少部分沿厚度方向X凸出设置并镶嵌于另一者的内部的配合关系，还能够保证熔断部2412发生熔断分隔形成的两个部分各自与绝缘防护部件242之间的连接强度，避免与绝缘防护部件242 之间相对位置的改变，进而有效的避免熔断部2412熔断后剩余部分重新搭接，提高电池单体20的安全性能。
参照图4至图6所示，在一些可选地实施中，第一配合部2414由熔断部2412在厚度方向X上去除部分材料形成。
去除部分材料形成可以理解为可以在熔断部2412沿厚度方向X一侧通过冲压、铣削等方式在熔断部2412上去除部分材料，以形成第一配合部2414。
第一配合部2414可以是小于熔断部2412的厚度尺寸的槽状，当然也可以是等于熔断部2412的厚度尺寸的孔状。
本申请实施例提供的转接组件24，通过使得第一配合部2414由熔断部2412在厚度方向X上去除部分材料形成，利于第一配合部2414的成型。并且，上述设置不会增加熔断部2412的过流面积，保证流经集流部件241的电流超过预设阈值时，熔断部2412保证先于端子连接部2411以及极耳连接部2413熔断。
在一些可选地实施中，本申请实施例提供的转接组件24，第一配合部2414包括多个第一压花2414a，各第一压花2414a由熔断部2412在厚度方向X上的表面向熔断部2412的内部凹陷设置，绝缘防护部件242至少部分镶嵌于各第一压花2414a内。
第一压花2414a的数量可以根据熔断部2412的尺寸规格进行设定，第一压花2414a可以为沿厚度方向X延伸的凹槽，当然也可以为沿厚度方向X延伸的孔。
绝缘防护部件242具有与各第一压花2414a形状相匹配的凸起，绝缘防护部件242的凸起伸入第一压花2414a内并镶嵌于第一压花2414a内。
本申请实施例提供的转接组件24，通过使得第一配合部2414包括多个第一压花2414a，并使得绝缘防护部件242至少部分镶嵌于各第一压花2414a内，保证第一配合部2414与绝缘防护部件242实现多点连接，提高二者接合面的紧密性能，进而提高绝缘防护部件242与熔断部2412之间连接的密封性能要求。
在一些可选地实施例中，沿厚度方向X，第一压花2414a的深度小于或者等于熔断部2412的厚度尺寸。
可选地，沿厚度方向X，第一压花2414a的深度也可以等于熔断部2412的厚度，也就是说，第一压花2414a在厚度方向X上也可以贯穿熔断部2412设置，第一压花2414a整体可以为通孔形式
参照图7所示，图7为本申请另一些实施例提供的转接组件24的局部剖视图。
在有些实施例中，在厚度方向X，第一压花2414a的深度可以小于熔断部2412的厚度，也就是说，第一压花2414a在厚度方向X上未贯穿熔断部2412设置，其在厚度方向X的上具有底壁，第一压花2414a整体可以为凹槽形式。
本申请实施例提供的转接组件24，通过使得第一压花2414a的深度小于或者等于熔断部2412的厚度尺寸，即，使得第一压花2414a可以是凹槽形式，也可以使得通孔的形式，结构多样化，可以根据过流面积需求，连接密封等级需求进行选择。
参照图8所示，图8为本申请又一些实施例提供的转接组件24的局部剖视图。
在一些可选地实施例中，沿厚度方向X，第一压花2414a的深度小于熔断部2412的厚度尺寸，熔断部2412在厚度方向X的两个表面均形成有第一配合部2414。
可选地，沿厚度方向X，第一压花2414a的深度小于熔断部2412的厚度尺寸时，可以使得熔断部2412在厚度方向X上的两个表面均形成有第一配合部2414，熔断部2412在厚度方向X上的两个第一配合部2414之间可以相对设置，当然，也可以错开设置。
可选地，熔断部2412在厚度方向X上的两侧形成的第一配合部2414，各自第一压花2414a在厚度方向X上的深度可以相同，当然也可以不相同。
本申请实施例提供的转接组件24，通过使得第一压花2414a的深度小于熔断部2412的厚度尺寸时，在熔断部2412的厚度方向X上的两侧均形成第一配合部2414，能够有效的提高熔断部2412在厚度方向X上的两侧各自与绝缘防护部件242之间接合面的密封性能。
在一些可选地实施例中，沿厚度方向X，第一压花2414a的深度小于熔断部2412的厚度尺寸的二分之一。也就是说，第一压花2414a的深度小于熔断部2412的厚度尺寸的一半。
通过上述设置，使得当熔断部2412在厚度方向X上的两侧均形成有第一配合部2414时，即使两个第一配合部2414在厚度方向X上相对设置，可以不将熔断部2412贯穿，利于两侧均设置有第一配合部2414的转接组件24的成型。
在一些可选地实施例中，本申请实施例提供的转接组件24，沿厚度方向X，第一压花2414a的正投影形状呈圆形、椭圆形或者多边形。
可选地，沿厚度方向X，第一压花2414a的正投影形状可以呈圆形。
可选地，沿厚度方向X，第一压花2414a的正投影形状可以呈椭圆形。
可选地，沿厚度方向X，第一压花2414a的正投影形状也可以呈矩形、五边形、六边形等。
可选地，沿厚度方向X，当第一压花2414a的正投影形状为多边形时，可以为正多边形，例如可以为正方形、正五边形、正六边形等。
通过使得第一压花2414a采用上述结构形状，能够保证与绝缘防护部件242之间的连接需求，优化二者接触面之间的密封效果。
参照图9、图10所示，图9为本申请又一些实施例提供的转接组件24的集 流部件241的局部剖视图，图10为本申请再一些实施例提供的转接组件24的集流部件241的局部剖视图。
在一些可选地实施例中，本申请实施例提供的转接组件24，沿厚度方向X，第一压花2414a的孔径逐段减小或者逐渐减小。
可选地，沿厚度方向X，第一压花2414a为变截面结构体。
如图9所示，可选地，第一压花2414a的孔径可以逐段减小，也就是说，第一压花2414a可以呈阶梯状，相邻段之间可以形成台阶面，以限制绝缘防护部件242伸入第一压花2414a内的部分与第一压花2414a分离。
如图10所示，可选地，第一压花2414a的孔径可以逐渐减小。通过上述设置，使得第一压花2414a可以呈锥形状，可以使得小口端朝向绝缘防护部件242的伸入第一压花2414a的部分，同样能够限制绝缘防护部件242伸入第一压花2414a内的部分与第一压花2414a分离。
通过上述设置，能够提高第一压花2414a与绝缘防护部件242之间的连接强度，进而保证二者接合面的密封性能。
参照图11所示，图11为本申请再一些实施例提供的转接组件24的俯视图。
在一些可选地实施例中，熔断部2412具有第一连接区2412a、第二连接区2412c以及过渡连接区2412b，第一连接区2412a与端子连接部2411连接，第二连接区2412c与极耳连接部2413连接，过渡连接区2412b连接于第一连接区2412a以及第二连接区2412c之间，其中，第一压花2414a在过渡连接区2412b的分布密度分别小于第一压花2414a在第一连接区2412a的分布密度以及第二连接区2412c的分布密度。
可选地，第一连接区2412a、过渡区以及第二连接区2412c可以相继设置。可选地，过渡区的过流面积小于第一连接区2412a的过流面积以及第二连接区2412c的过流面积。
可选地，第一压花2414a在过渡连接区2412b的分布密度分别小于第一压花2414a在第一连接区2412a的分布密度以及第二连接区2412c的分布密度。可以理解为，第一压花2414a在过渡连接区2412b单位面积的分布数量小于第一压花2414a在第一连接区2412a以及第二连接区2412c单位面积的分布数量。
例如，第一压花2414a在过渡连接区2412b单位面积内分布5个，则可以使得第一压花2414a在第一连接区2412a以及第二连接区2412c单位面积内分布10个，当然，此为更好理解本申请给出的示例，不限于上述分布密度，具体可以根据转接组件24的尺寸、集流部件241与绝缘防护部件242之间的连接强度需求等进行设置。
本申请实施例提供的转接组件24，通过使得第一压花2414a在过渡连接区 2412b的分布密度分别小于第一压花2414a在第一连接区2412a的分布密度以及第二连接区2412c的分布密度。能够增加绝缘防护部件242与熔断部2412在第一连接区2412a以及第二连接区2412c接合面的密封性能。
参照图9至图11所示，在一些可选地实施例中，在厚度方向X，第一压花2414a的深度a的取值范围满足0mm＜a≤3mm。
可选地，第一压花2414a的深度a可以为0mm、3mm之间的任意数值，包括3mm端值。
可选地，第一压花2414a的深度可以为0.5mm、1mm、1.5mm、2mm、2.5mm、3mm中的任意数值。
本申请实施例提供的转接组件24，通过使得第一压花2414a的深度a采用上述取值范围，既能够保证与绝缘防护部件242之间接合面的密封性能，同时还能够利于第一压花2414a的加工。
参照图12所示，图12为本申请再一些实施例提供的转接组件24的轴测图。
在一些可选地实施例中，端子连接部2411上设置有沿厚度方向X凹陷的凹部2411a，凹部2411a的底壁上形成有第二配合部2411b，第二配合部2411b包括多个第二压花2411c，各第二压花2411c由底壁在厚度方向X向底壁的内部凹陷形成。
凹部2411a用于与电极端子222配合，凹部2411a的形状可以与电极端子222的形状相匹配，以保证与电极端子222的电连接需求。
每个第二压花2411c在厚度方向X上的正投影形状可以呈圆形、椭圆形或者多边形。
可选地，沿厚度方向X，第二压花2411c的厚度可以小于凹部2411a的底壁的厚度。
本申请实施例提供的转接组件24，通过在凹部2411a的底壁上形成有第二配合部2411b，第二配合部2411b包括多个第二压花2411c，能够增加凹部2411a的底壁的粗糙度，使得当端子连接部2411在与电极端子222进行激光焊接时，防止激光被反射，提高激光能量利用率，保证焊接需求。
如图12所示，作为一种可选地实施方式，集流部件241整体呈板状结构体，熔断部2412上设置有沿厚度方向X贯穿的缺口2412d，缺口2412d用于使得熔断部2412的过流面积小于端子连接部2411的过流面积以及极耳连接部2413的过流面积，绝缘防护部件242在厚度方向X的正投影覆盖缺口2412d。
可选地，集流部件241整体呈板状结构体可以理解为集流部件241大部分区域为板状，也就是说集流部件241大体呈板状结构体，其允许具有凸部或凹部。
可选地，缺口2412d可以为具有开口的U形槽状。
可选地，可以使得熔断部2412在自身宽度方向的一侧设置缺口2412d，或者在自身宽度方向的两侧设置缺口2412d.。
可选地，熔断部2412的过流面积、端子连接部2411的过流面积以及极耳连接部2413的过流面积可以理解为在熔断部2412、端子连接部2411、极耳连接部2413三者排布方向上，熔断部2412的横截面截得的横截面积、端子连接部2411的横截面截得的横截面积以及极耳连接部2413的横截面截得的横截面积。
可选地，熔断部2412、端子连接部2411、极耳连接部2413三者排布方向与厚度方向X相垂直。
可选地，当熔断部2412包括第一连接区2412a、过渡连接区2412b以及第二连接区2412c时，缺口2412d具体可以位于过渡连接区2412b，使得熔断部2412至少在过渡连接区2412b的位置的过流面积小于端子连接部2411的过流面以及极耳连接部2413的过流面积。
可选地，熔断部2412设置缺口2412d的位置位于绝缘防护部件242内部，绝缘防护部件242包围熔断部2412设置。
参照图13所示，图13为本申请再一些实施例提供的转接组件24的俯视图。可以理解的是，缺口2412d不限于为U形槽状，如图13所示，在有些实施例中，也可以为闭合的孔状。
本申请实施例提供的转接组件24，集流部件241整体呈板状结构体，利于加工成型，保证与电极端子222以及极耳231之间的连接需求。缺口2412d的设置利于减小熔断部2412对应区域的过流面积，提高转接组件24的安全性能，绝缘防护部件242在厚度方向X的正投影覆盖缺口2412d，使得当熔断部2412在缺口2412d的位置发生熔断时，绝缘防护部件242能够保证熔断部2412剩余两侧部分的相对位置保持不变，进而满足当熔断部2412熔断时保持端子连接部2411与极耳连接部2413的相对位置固定需求。
在一些可选地实施例中，端子连接部2411、熔断部2412以及极耳连接部2413可以为一体式结构，保证二者之间的连接强度。
可选地，极耳连接部2413也可以为两个间隔且平行设置的片状单元，两个片状单元间隔设置并分别与熔断部2412连接。可以为一整体式片状结构，只要能够满足与极耳231之间的连接需求均可。
根据本申请的一些实施例，本申请还提供了一种电池单体20，电池单体20包括壳体21、电极组件23、端盖组件22以及上述任一方案的转接组件24，电极组件23设置于壳体21内，电极组件23包括极耳231。端盖组件22封闭壳体21的开口设置，端盖组件22包括电极端子222，极耳连接部2413用于与极耳231连接，端子连接部2411用于与电极端子222连接。
本申请实施例提供的电池单体20，因其包括上述各实施例提供的转接组件24，集流部件241与绝缘防护部件242之间的密封性能好，电池单体20的整体安全性能高。
根据本申请的一些实施例，本申请还提供了一种电池，包括以上任一方案所述的电池单体20。
根据本申请的一些实施例，本申请还提供了一种用电装置，包括以上任一方案所述的电池，并且电池用于为用电装置提供电能。
用电装置可以是前述任一应用电池的设备或***。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (15)

  1. 一种转接组件，包括：
    集流部件，具有端子连接部、熔断部以及极耳连接部，所述熔断部连接于所述端子连接部与所述极耳连接部之间；
    绝缘防护部件，包覆所述熔断部设置，所述绝缘防护部件用于在所述熔断部熔断时保持所述端子连接部与所述极耳连接部的相对位置固定；
    其中，所述熔断部至少在厚度方向上的一个表面形成有第一配合部，所述第一配合部与所述绝缘防护部件中的一者至少部分沿所述厚度方向凸出设置并镶嵌于另一者的内部。
  2. 根据权利要求1所述的转接组件，其中，所述第一配合部由所述熔断部在所述厚度方向上去除部分材料形成。
  3. 根据权利要求1或2所述的转接组件，其中，所述第一配合部包括多个第一压花，各所述第一压花由所述熔断部在所述厚度方向上的表面向所述熔断部的内部凹陷设置，所述绝缘防护部件至少部分镶嵌于各所述第一压花内。
  4. 根据权利要求3所述的转接组件，其中，沿所述厚度方向，所述第一压花的深度小于或者等于所述熔断部的厚度尺寸。
  5. 根据权利要求4所述的转接组件，其中，沿所述厚度方向，所述第一压花的深度小于所述熔断部的厚度尺寸，所述熔断部在所述厚度方向的两个所述表面均形成有所述第一配合部。
  6. 根据权利要求5所述的转接组件，其中，所述第一压花的深度小于所述熔断部的厚度尺寸的二分之一。
  7. 根据权利要求3至6任意一项所述的转接组件，其中，沿所述厚度方向，所述第一压花的正投影形状呈圆形、椭圆形或者多边形。
  8. 根据权利要求3至7任意一项所述的转接组件，其中，在所述厚度方向，沿从所述熔断部的表面指向所述熔断部内部的方向，所述第一压花的孔径逐段减小或者逐渐减小。
  9. 根据权利要求3至8任意一项所述的转接组件，其中，所述熔断部具有第一连接区、第二连接区以及过渡连接区，所述第一连接区与所述端子连接部连接，所述第二连接区与所述极耳连接部连接，所述过渡连接区连接于所述第一连接区以及所述第二连接区之间，其中，所述第一压花在所述过渡连接区的分布密度分别小于所述第一压花在所述第一连接区的分布密度以及所述第二连接区的分布密度。
  10. 根据权利要求3至9任意一项所述的转接组件，其中，在所述厚度方向，所述第一压花的深度a的取值范围满足0mm＜a≤3mm。
  11. 根据权利要求1至10任意一项所述的转接组件，其中，所述端子连接部上设置有沿所述厚度方向凹陷的凹部，所述凹部的底壁上形成有第二配合部，所述第二配合部包括多个第二压花，各所述第二压花由所述底壁在所述厚度方向所述底壁的内部凹陷形成。
  12. 根据权利要求1至11任意一项所述的转接组件，其中，所述集流部件整体呈板状结构体，所述熔断部上设置有沿所述厚度方向贯穿的缺口，所述缺口用于减小所述熔断部至少部分段的过流面积，所述绝缘防护部件在所述厚度方向的正投影覆盖所述缺口。
  13. 一种电池单体，包括：
    壳体；
    电极组件，设置于所述壳体内，所述电极组件包括极耳；
    端盖组件，封闭所述壳体的开口设置，所述端盖组件包括电极端子；
    如权利要求1至12任意一项所述的转接组件，所述极耳连接部用于与所述极耳连接，所述端子连接部用于与所述电极端子连接。
  14. 一种电池，包括如权利要求13所述的电池单体。
  15. 一种用电装置，包括如权利要求14所述的电池。
PCT/CN2022/087445 2022-04-18 2022-04-18 转接组件、电池单体、电池及用电装置 WO2023201474A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206116507U (zh) * 2016-11-01 2017-04-19 宁德时代新能源科技股份有限公司 二次电池
CN110098368A (zh) * 2018-01-29 2019-08-06 三星Sdi株式会社 二次电池
CN214280158U (zh) * 2021-01-29 2021-09-24 常州瑞德丰精密技术有限公司 转接片、二次电池及电池模组
CN214957272U (zh) * 2021-04-23 2021-11-30 常州瑞德丰精密技术有限公司 二次电池的防脱落熔断结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206116507U (zh) * 2016-11-01 2017-04-19 宁德时代新能源科技股份有限公司 二次电池
CN110098368A (zh) * 2018-01-29 2019-08-06 三星Sdi株式会社 二次电池
CN214280158U (zh) * 2021-01-29 2021-09-24 常州瑞德丰精密技术有限公司 转接片、二次电池及电池模组
CN214957272U (zh) * 2021-04-23 2021-11-30 常州瑞德丰精密技术有限公司 二次电池的防脱落熔断结构

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