WO2024066162A1 - 转接件、电池单体、电池以及用电装置 - Google Patents

转接件、电池单体、电池以及用电装置 Download PDF

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Publication number
WO2024066162A1
WO2024066162A1 PCT/CN2023/075456 CN2023075456W WO2024066162A1 WO 2024066162 A1 WO2024066162 A1 WO 2024066162A1 CN 2023075456 W CN2023075456 W CN 2023075456W WO 2024066162 A1 WO2024066162 A1 WO 2024066162A1
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WO
WIPO (PCT)
Prior art keywords
adapter
recess
positioning
along
connection
Prior art date
Application number
PCT/CN2023/075456
Other languages
English (en)
French (fr)
Inventor
柯海波
李全坤
程启
王鹏
曹俊琪
毛国安
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2024066162A1 publication Critical patent/WO2024066162A1/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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • 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 more specifically, to an adapter, a battery cell, a battery, and an electrical device.
  • Battery monomers are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.
  • the present application provides a switching component, a battery cell, a battery and an electrical device, which can improve the stability of the welding process and enhance the safety of the battery.
  • an embodiment of the present application provides an adapter, which includes a first connection portion, a second connection portion, and a positioning structure.
  • the first connection portion is used to electrically connect to the tab of a battery cell.
  • the first connection portion and the second connection portion are arranged along a first direction, and the second connection portion is used to electrically connect to the electrode terminal of the battery cell.
  • the positioning structure provides the adapter with at least a first direction relative limit and a second direction limit, and the first direction intersects with the second direction.
  • the adapter is limited in multiple directions, thereby reducing the possibility of displacement of the adapter during the connection process with the pole ear and other processes in the battery, thereby improving the safety of the battery.
  • projections of the positioning structure and the second connecting portion at least partially overlap.
  • the positioning structure cooperates with the clamp or other components in the battery to provide positioning for the adapter in multiple directions.
  • the positioning structure is arranged close to the second connecting part, so that the force applied to the adapter when it cooperates with other components can be absorbed by the area between the second connecting part and the positioning structure, thereby reducing the possibility of the force affecting the first connecting part, and further reducing the possibility of the force affecting the tab.
  • the positioning structure includes a recessed portion, and the recessed portion is located on at least one side of the adapter along the second direction.
  • the recess includes at least one positioning edge, and the positioning edge intersects with the first direction and/or the second direction.
  • the positioning edge in the recess cooperates with the fixture or other components in the battery to provide positioning of the adapter in at least one of the first direction and/or the second direction.
  • the positioning edge includes a first positioning edge, and the first positioning edge is parallel to an edge of the second connecting portion away from the first connecting portion.
  • the first positioning edge is parallel to the edge of the second connecting part away from the first connecting part, and the clamp or other components cooperate with the first positioning edge and the edge of the second connecting part away from the first connecting part at the same time, so that the limiting direction of the adapter by the clamp or other components is the same as the distribution direction of the first connecting part and the second connecting part in the adapter, thereby realizing bidirectional limitation in the first direction.
  • the positioning edge further includes a second positioning edge, and an angle ⁇ between the first positioning edge and the second positioning edge satisfies 30° ⁇ 135°.
  • the angle is limited to 30° ⁇ 135° to balance the contact area between other components and the adapter and the connection strength between the first connection part and the second connection part.
  • the positioning structure is configured to cooperate with the clamp to limit the movement of the adapter in the first direction.
  • At least one of the first positioning edge and the second positioning edge in the positioning structure cooperates with the clamp to limit the movement of the adapter in the first direction, thereby reducing the possibility of the adapter moving along the first direction.
  • the side of the recess opposite to the recess along the second direction is configured to cooperate with the clamp to limit the movement of the adapter in the second direction.
  • the recess and the side of the recess opposite to the second direction cooperate with the clamp, thereby limiting the movement of the adapter along the second direction and reducing the possibility of the adapter moving along the second direction.
  • the recess includes a first recess and a second recess, and the first recess and the second recess are respectively located on two opposite sides of the adapter in the second direction.
  • two opposite recesses are provided on the adapter along the second direction to increase the contact area and contact direction between the adapter and other components, thereby improving the reliability of the other components limiting the adapter.
  • projections of the first recess and the second recess at least partially overlap.
  • the projection of the first recess and the projection of the second recess at least partially overlap, thereby reducing the space occupied by the two recesses on the adapter, and the more the overlapping area of the two recesses in the second direction, the more conducive it is to the clamping of the clamp.
  • the dimension of the first connecting portion along the second direction is D1
  • the dimension of the overlapping area of the projections of the first recess and the second recess in the first direction is D2
  • D2 and D1 satisfy the relationship 0.3 ⁇ D2/D1 ⁇ 0.9.
  • D2/D1 the smaller the value of D2/D1 is, the worse the limiting effect of the two recesses when they cooperate with other components; the larger the value of D2/D1 is, the longer the length of the groove along the first direction X is, resulting in that some areas in the groove cannot play a limiting role.
  • D2/D1 is limited to 0.3 ⁇ D2/D1 ⁇ 0.9, and the extension length of the two grooves along the first direction X is reduced as much as possible while satisfying the limiting effect of the concave portion on the adapter.
  • the first recess and the second recess are symmetrically arranged.
  • the symmetrical first recess and the second recess are conducive to the clamping or limiting of the fixture or other components, thereby improving the positioning accuracy.
  • the adapter can be subjected to the force in the opposite direction, thereby reducing the possibility of the position of the adapter changing due to the force on one side of the adapter being greater than the force on the other side, thereby improving the positioning stability of the adapter.
  • the dimension of the first connection portion along the second direction is D1.
  • the minimum distance between the edge of the second connection portion away from the first connection portion and the positioning structure is D3, and D1 and D3 satisfy the relationship 0.1 ⁇ D3/D1 ⁇ 1.
  • the relationship between D1 and D3 is limited to 0.1 ⁇ D3/D1 ⁇ 1 to balance the limiting effect of the groove and the space occupied by the positioning structure.
  • the first connecting portion includes a tab connecting region connected to the tab, and the positioning structure and the tab connecting region are spaced apart along the first direction.
  • the tab connection area and the positioning structure are spaced apart, thereby avoiding the positioning structure from affecting the tab connection area.
  • the minimum distance between the positioning structure and the tab connection area is D4
  • the size of the tab connection area along the first direction is D5
  • D4 and D5 satisfy the relationship 0.1 ⁇ D4/D5 ⁇ 1.
  • the value of D4/D5 is limited to 0.1 ⁇ D4/D5 ⁇ 1, balancing the distance between the groove and the connection area of the tab.
  • a fuse portion is provided between the first connection portion and the second connection portion, and in the second direction, a size of the fuse portion is smaller than a size of the first connection portion, and in the second direction, a size of the fuse portion is smaller than a size of the second connection portion.
  • the size of the fuse in the second direction is smaller than the size of the first connection part and the second connection part in the second direction, which can ensure that the circuit can be disconnected immediately when a large current passes through the adapter, reducing the risk of thermal runaway.
  • the present application also provides a battery cell, including a housing, an electrode terminal and an electrode assembly.
  • the housing is provided with a receiving cavity.
  • the electrode terminal is provided in the housing.
  • the electrode assembly is received in the receiving cavity, and the electrode assembly includes a tab.
  • At least one adapter according to any embodiment of the first aspect.
  • an embodiment of the present application further provides a battery, comprising a battery cell according to any embodiment of the second aspect, and the battery is used to provide electrical energy.
  • the present application also provides an electrical device, including the electrical device of any embodiment of the second aspect.
  • Battery cell battery cell is used to provide electrical energy.
  • FIG1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application.
  • FIG2 is an exploded schematic diagram of a battery provided in some embodiments of the present application.
  • FIG3 is a schematic structural diagram of the battery module shown in FIG2 ;
  • FIG4 is an exploded schematic diagram of the battery cell shown in FIG3 ;
  • FIG5 is a schematic diagram of the structure of an adapter provided in some embodiments of the present application.
  • FIG6 is an enlarged schematic diagram of the adapter shown in FIG5 at a block Q;
  • FIG7 is a schematic diagram of the structure of adapters provided in some other embodiments of the present application.
  • FIG8 is a schematic diagram of the structure of adapters provided in some other embodiments of the present application.
  • FIG. 9 is a schematic diagram of the structure of adapters provided in some other embodiments of the present application.
  • X first direction
  • Y second direction
  • the terms “installed”, “connected”, “connected”, and “attached” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.
  • 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., and the embodiments of the present application do not limit this.
  • Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery generally includes a box for encapsulating 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 and an electrolyte.
  • the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator.
  • the battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work.
  • the positive electrode sheet includes a positive electrode collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode collector.
  • the positive electrode collector includes a positive electrode coating area and a positive electrode ear connected to the positive electrode coating area.
  • the positive electrode coating area is coated with a positive electrode active material layer.
  • the positive electrode tab is not coated with the positive electrode active material layer.
  • the material of the positive electrode current collector may be aluminum, and the positive electrode active material layer includes the positive electrode active material, which may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.
  • the negative electrode plate 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 coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material may be carbon or silicon, etc.
  • the material of the separator may be polypropylene (PP) or polyethylene (PE), etc.
  • the battery cell also includes a housing, an electrode terminal and an adapter.
  • the housing forms a cavity for accommodating the electrode assembly, and the electrode terminal is mounted on the housing.
  • the housing can protect the electrode assembly from the outside to prevent external foreign matter from affecting the charging or discharging of the electrode assembly.
  • the electrode terminal is used to electrically connect to the tab of the electrode assembly to lead out the electrical energy generated by the electrode assembly.
  • the adapter is used to connect the electrode terminal and the tab to electrically connect the electrode terminal to the tab.
  • the adapter needs to be connected to the tab and the electrode terminal.
  • the adapter needs to be positioned to reduce the movement of the adapter during the assembly process.
  • a clamp is usually used to press against two opposite edges of the adapter to position the adapter.
  • the adapter will still vibrate to a certain extent relative to the pole lug, causing the relative position between the adapter and the pole lug to shift, resulting in a deviation in the connection position between the adapter and the pole lug, affecting the quality of the product and easily causing the risk of connection failure between the adapter and the pole lug.
  • the adapter includes a first connecting portion, a second connecting portion and a positioning structure.
  • the first connecting portion is used to electrically connect to the pole lug of the battery cell.
  • the first connecting portion and the second connecting portion are arranged along a first direction, and the second connecting portion is used to electrically connect to the electrode terminal of the battery cell.
  • the positioning structure provides the adapter with at least relative limitation in the first direction and limitation in the second direction, and the first direction intersects with the second direction. This structure reduces the risk of relative position displacement between the adapter and the pole lug when the adapter cooperates with other components, thereby improving the safety of the battery.
  • Electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc.
  • Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.
  • spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.
  • electric toys include fixed 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, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.
  • the embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.
  • FIG. 1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application.
  • a battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000.
  • the battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source for the vehicle 1000.
  • the vehicle 1000 may further include a controller 200 and a motor 300.
  • the controller 200 is used to control the battery 100 to power the motor. Up to 300 watts of power can be supplied, for example, for starting, navigating, and driving the vehicle 1000 .
  • the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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 schematic diagram of a battery provided in some embodiments of the present application.
  • the battery 100 includes a box body and a battery cell 1 (not shown in FIG. 2 ), and the battery cell 1 is accommodated in the box body.
  • the box is used to accommodate the battery cell 1, and the box can be a variety of structures.
  • the box may include a first box portion 401 and a second box portion 402, the first box portion 401 and the second box portion 402 cover each other, and the first box portion 401 and the second box portion 402 jointly define a storage space 403 for accommodating the battery cell 1.
  • the second box portion 402 may be a hollow structure with one end open, the first box portion 401 is a plate-like structure, and the first box portion 401 covers the open side of the second box portion 402 to form a box with a storage space 403; the first box portion 401 and the second box portion 402 may also be a hollow structure with one side open, and the open side of the first box portion 401 covers the open side of the second box portion 402 to form a box with a storage space 403.
  • the first box portion 401 and the second box portion 402 may be in a variety of shapes, such as a cylinder, a cuboid, etc.
  • a sealing member such as a sealant, a sealing ring, etc., may also be provided between the first box body 401 and the second box body 402 .
  • the first box body portion 401 covers the top of the second box body portion 402
  • the first box body portion 401 can also be referred to as an upper box cover
  • the second box body portion 402 can also be referred to as a lower box.
  • the battery 100 there can be one or more battery cells 1.
  • the multiple battery cells 1 can be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the multiple battery cells 1 are both connected in series and in parallel.
  • the multiple battery cells 1 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 1 is accommodated in the box; of course, it is also possible that multiple battery cells 1 are first connected in series, in parallel, or in mixed connection to form a battery module 500, and the multiple battery modules 500 are then connected in series, in parallel, or in mixed connection to form a whole and accommodated in the box.
  • FIG. 3 is a schematic diagram of the structure of the battery module 500 shown in FIG. 2.
  • Multiple battery modules 500 are then connected in series, in parallel, or in mixed series to form a whole, and are accommodated in a box.
  • the multiple battery cells 1 in the battery module 500 can be electrically connected via a busbar component to achieve parallel connection, series connection, or mixed connection of the multiple battery cells 1 in the battery module 500 .
  • Fig. 4 is an exploded schematic diagram of the battery cell 1 shown in Fig. 3.
  • the battery cell 1 provided in the embodiment of the present application comprises an electrode assembly 40 and a housing 10, wherein the electrode assembly 40 is accommodated in the housing 10.
  • the housing 10 can also be used to contain electrolyte, such as electrolyte.
  • the housing 10 can be in various structural forms.
  • the housing 10 may include a shell 11 and an end cap 12, wherein the shell 11 is a hollow structure with one side open, and the end cap 12 covers the opening of the shell 11 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 40 and the electrolyte.
  • the electrode assembly 40 When assembling the battery cell 1 , the electrode assembly 40 may be placed into the housing first, and then the end cap 12 may be closed on the opening of the housing 11 , and then the electrode substance may be injected into the housing 11 through the electrolyte injection port on the end cap 12 .
  • the shell 11 can be in various shapes, such as a cylinder, a cuboid, etc.
  • the shape of the shell 11 can be determined according to the electrode group.
  • the specific shape of the electrode assembly 40 is determined. For example, if the electrode assembly 40 is a cylindrical structure, a cylindrical shell 11 can be selected; if the electrode assembly 40 is a rectangular structure, a rectangular shell 11 can be selected.
  • the end cap 12 can also be a variety of structures, for example, the end cap 12 is a plate-like structure, a hollow structure with one end open, etc. Exemplarily, in FIG. 4, the shell 11 is a rectangular structure, the end cap 12 is a plate-like structure, and the end cap 12 covers the opening at the top of the shell 11.
  • the battery cell 1 includes an electrode terminal 20 disposed on the housing 10 , and at least a portion of the electrode terminal 20 is exposed to the outside of the battery cell 1 to facilitate connection with other components (such as a busbar) to thereby lead out the electrical energy generated by the electrode assembly 40 .
  • the electrode terminal 20 may be a part of the housing 10 or may be an independent component mounted on the housing 10 .
  • the electrode terminal 20 is provided in plurality, and the plurality of electrode terminals 20 include a positive electrode terminal 21 and a negative electrode terminal 22.
  • the positive electrode terminal 21 and the negative electrode terminal 22 are both used to be electrically connected to the electrode assembly to output the electric energy generated by the electrode assembly.
  • the battery cell 1 may further include a pressure relief mechanism 30.
  • the positive electrode terminal 21, the negative electrode terminal 22 and the pressure relief mechanism 30 are all mounted on the end cap. The pressure relief mechanism 30 is used to release the pressure inside the battery cell 1 when the internal pressure or temperature of the battery cell 1 reaches a predetermined value.
  • the pressure relief mechanism 30 is located between the positive electrode terminal 21 and the negative electrode terminal 22 , and the pressure relief mechanism 30 may be a component such as an explosion-proof valve, an explosion-proof disk, an air valve, a pressure relief valve or a safety valve.
  • the housing may also be other structures, for example, the housing includes a shell and two end caps, the shell is a hollow structure with two opposite openings, and one end cap is correspondingly covered at one opening of the shell and forms a sealed connection to form a sealed space for accommodating the electrode assembly and the electrolyte.
  • the positive electrode terminal 21 and the negative electrode terminal 22 may be installed on the same end cap or on different end caps; the pressure relief mechanism 30 may be installed on one end cap or on both end caps.
  • the number of electrode assemblies contained in the housing may be one or more.
  • the number of electrode assemblies contained in the housing may be one or more.
  • the electrode assembly 40 includes a body 41 and a tab 42 protruding from the body 41.
  • the electrode assembly 40 includes a positive tab and a negative tab
  • the positive tab may be a portion of the positive electrode sheet not coated with an active material layer
  • the negative tab may be a portion of the negative electrode sheet not coated with an active material layer
  • the positive tab and the negative tab conduct the electric energy generated by the body 41.
  • the positive tab and the negative tab may be located together at one end of the body 41 or respectively at opposite ends of the body 41.
  • Fig. 5 is a schematic diagram of the structure of the adapter provided in some embodiments of the present application.
  • Fig. 6 is an enlarged schematic diagram of the adapter shown in Fig. 5 at the block Q.
  • Fig. 7 is a schematic diagram of the structure of the adapter provided in some other embodiments of the present application.
  • Fig. 8 is a schematic diagram of the structure of the adapter provided in some other embodiments of the present application.
  • the adapter 50 of the embodiment of the present application includes a first connecting portion 51, a second connecting portion 52 and a positioning structure 53.
  • the first connecting portion 51 is used to electrically connect to the tab of the battery cell 1.
  • the first connecting portion 51 and the second connecting portion 52 are arranged along the first direction X, and the second connecting portion 52 is used to electrically connect to the electrode terminal 20 of the battery cell 1.
  • the positioning structure 53 provides the adapter 50 with at least facing each other in the first direction X and limiting in the second direction Y, and the first direction X intersects with the second direction Y.
  • the adapter can be used to connect the positive tab and the positive electrode terminal 21, and can also be used to connect the negative tab and the negative electrode terminal 22.
  • the projection shape of the adapter 50 along the thickness direction includes a rectangle, a circle, an ellipse, an oblong or other shapes.
  • the first connection portion 51 is used to electrically connect to the tab of the battery cell 1.
  • the embodiment of the present application does not limit the connection method between the first connection portion 51 and the tab.
  • the first connection portion 51 can be connected to the tab by welding, bonding, clamping or other methods.
  • the first connection portion 51 is connected to the tab of the battery cell 1 by ultrasonic welding.
  • the second connection portion 52 is used to be electrically connected to the electrode terminal 20 of the battery cell 1 .
  • the second connection portion 52 is connected to the electrode terminal 20 of the battery cell 1 by laser welding.
  • the first direction-facing limit provided by the positioning structure to the adapter is the positive direction limit of the first direction and the negative direction limit of the first direction.
  • the second direction can also be divided into a positive direction and a negative direction.
  • the positioning structure can provide the adapter with four directions of limit along the positive direction and negative direction of the first direction, the positive direction and negative direction of the second direction, and the positive direction and negative direction of the second direction.
  • the first connection part 51 and the second connection part 52 are respectively arranged at the two ends of the adapter 50 along the first direction X.
  • the clamp will be located in an area away from the first connection part 51 to prevent the clamp from interfering with the connection process between the first connection part 51 and the pole ear.
  • the positioning structure 53 may include a convex portion, a concave portion, a hole, a notch or other structures.
  • the positioning structure 53 in the adapter 50 that cooperates with other components can be a plurality of positioning surfaces on the adapter 50 that cooperate with the other components to limit the position.
  • the other components respectively resist the plurality of positioning surfaces; or there can be a plurality of positioning holes on the adapter 50 that cooperate with the other components to limit the position.
  • the other components are respectively nested in the plurality of positioning holes; or there can be a plurality of positioning grooves on the adapter 50 that cooperate with the other components to limit the position.
  • the other components are respectively clamped with the plurality of positioning grooves; or there can be a combination of two or more positioning surfaces, positioning holes, and positioning grooves on the adapter 50 to cooperate with the other components to limit the position.
  • a positioning structure 53 is provided on the adapter 50 so that when other components cooperate with the positioning structure 53, the adapter 50 is limited in multiple directions, thereby reducing the possibility of displacement of the adapter 50 during the connection process with the tab and other processes in the battery, thereby improving the safety of the battery.
  • the projections of the positioning structure 53 and the second connection portion 52 at least partially overlap along the second direction Y.
  • the projections of the positioning structure 53 and the second connection portion 52 overlap along the second direction Y, and the projections of the positioning structure 53 are located within the projections of the second connection portion 52.
  • the projections of the positioning structure 53 and the second connection portion 52 partially overlap.
  • the positioning structure 53 cooperates with the clamp or other components in the battery to provide positioning for the adapter 50 in multiple directions.
  • the positioning structure 53 is arranged close to the second connecting portion 52, so that the force applied to the adapter 50 when cooperating with other components can be absorbed by the area between the second connecting portion 52 and the positioning structure 53, thereby reducing the possibility of the force affecting the first connecting portion 51, and further reducing the possibility of the force affecting the tab 42.
  • the positioning structure 53 includes a recess 531, the recess 531 is located on at least one side of the adapter 50 along the second direction Y, and the recess 531 includes at least one positioning edge, and the positioning edge is intersected with the first direction X and/or the second direction Y.
  • the recess 531 includes a depression from one side edge of the adapter 50 toward the other side edge opposite thereto.
  • the embodiment of the present application does not limit the shape of the projection of the recess 531 in the thickness direction.
  • the recess 531 includes Rectangular, triangular, semicircular or other shapes.
  • a recess 531 is provided on one of the two opposite sides of the adapter 50 along the second direction Y; recesses 531 are provided on both opposite sides of the adapter 50 along the second direction Y; a plurality of recesses 531 spaced apart along the first direction X are provided on one of the two opposite sides of the adapter 50 along the second direction Y, so as to ensure that the recesses 531 play a limiting role on the adapter 50.
  • the embodiment of the present application does not limit the number of positioning edges.
  • the recess 531 includes one positioning edge, two positioning edges, three positioning edges, or multiple positioning edges.
  • the embodiments of the present application do not limit the extension direction of the positioning edge.
  • the positioning edge extends in a direction intersecting the first direction X; the positioning edge extends in a direction intersecting the second direction Y; the positioning edge extends in a direction intersecting the first direction X and parallel to the second direction Y; the positioning edge extends in a direction parallel to the first direction X and intersecting the second direction Y, as long as it can ensure that the recess 531 plays a limiting role on the adapter 50.
  • the positioning edge in the recess 531 cooperates with the fixture or other components in the battery to provide positioning of the adapter 50 in at least one direction in the first direction X and/or the second direction Y.
  • the positioning edge includes a first positioning edge 531 a , and the first positioning edge 531 a is parallel to an edge of the second connection portion 52 away from the first connection portion 51 .
  • the first positioning edge 531a is parallel to the edge of the second connection portion 52 away from the first connection portion 51, and the clamp or other components cooperate with the first positioning edge 531a and the edge of the second connection portion 52 away from the first connection portion 51 at the same time, so that the limiting direction of the clamp or other components on the adapter 50 is the same as the distribution direction of the first connection portion 51 and the second connection portion 52 in the adapter 50, thereby achieving bidirectional limitation in the first direction X.
  • the positioning edge further includes a second positioning edge 531 b , and an angle ⁇ between the first positioning edge 531 a and the second positioning edge 531 b satisfies 30° ⁇ 135°.
  • the angle is limited to 30° ⁇ 135° to balance the contact area between other components and the adapter 50 and the connection strength between the first connection part 51 and the second connection part 52.
  • the positioning structure 53 is configured to cooperate with a clamp to limit the movement of the adapter 50 in the first direction X.
  • At least one of the first positioning edge 531a and the second positioning edge 531b in the positioning structure 53 cooperates with a clamp to limit the movement of the adapter 50 in the first direction X, thereby reducing the possibility of the adapter 50 moving along the first direction X.
  • the edge of the second connection portion 52 away from the first connection portion 51 and the recess 531 are configured to cooperate with the clamp to limit the movement of the adapter 50 in the first direction X and the second direction Y.
  • the second connection portion 52 is away from the edge of the first connection portion 51 and the first positioning portion in the recess 531.
  • the edge 531a cooperates with the clamp to limit the movement of the adapter 50 in the first direction X.
  • the edge of the second connection portion 52 away from the first connection portion 51 cooperates with the second positioning edge 531b in the recess 531 and the clamp to limit the movement of the adapter 50 in the first direction X.
  • the recess 531 cooperates with the corresponding edge of the second connecting portion 52 along the second direction Y and the clamp, thereby limiting the movement of the adapter 50 in the second direction Y.
  • the edge profile on the adapter 50 is used to cooperate with the recess 531 and the fixture, thereby simplifying the positioning structure 53 and reducing the difficulty of the manufacturing process of the adapter 50 .
  • the side of the recess 531 opposite to the recess 531 along the second direction Y is configured to cooperate with a fixture to limit the movement of the adapter 50 in the second direction Y.
  • the recess 531 cooperates with the side opposite to the recess 531 along the second direction Y and the clamp, thereby limiting the movement of the adapter 50 along the second direction Y and reducing the possibility of the adapter 50 moving along the second direction Y.
  • the recess 531 includes a first recess 5311 and a second recess 5312 , and the first recess 5311 and the second recess 5312 are respectively located on two opposite sides of the adapter 50 in the second direction Y.
  • the shape of the orthographic projection of the first recess 5311 along the thickness direction of the adapter 50 is the same as the shape of the orthographic projection of the second recess 5312 along the thickness direction of the adapter 50, so that the forces exerted by other components on both sides of the adapter 50 are the same, reducing the possibility of damage to other areas around the side subjected to greater forces when the forces exerted on both sides are uneven.
  • the shape of the orthographic projection of the first recess 5311 along the thickness direction of the adapter 50 is different from the shape or size of the orthographic projection of the second recess 5312 along the thickness direction of the adapter 50, so that the adapter 50 can be more flexibly matched with different components, thereby limiting the position of the adapter 50.
  • two opposite recesses are provided on the adapter 50 along the second direction Y to increase the contact area and contact direction between the adapter 50 and other components, thereby improving the reliability of limiting the adapter 50 by other components.
  • the projections of the first concave portion 5311 and the second concave portion 5312 at least partially overlap.
  • the projection of the first concave portion 5311 and the projection of the second concave portion 5312 overlap, and illustratively, the projection of the first concave portion 5311 is located within the projection of the second concave portion 5312; the projection of the second concave portion 5312 is located within the projection of the first concave portion 5311; the projection of the first concave portion 5311 and the projection of the second concave portion 5312 coincide. In other examples, along the second direction Y, the projection of the first concave portion 5311 and the projection of the second concave portion 5312 partially overlap.
  • the projection of the first recess 5311 and the projection of the second recess 5312 at least partially overlap, thereby reducing the space occupied by the two recesses on the adapter 50, and the more the overlapping area of the two recesses in the second direction Y, the more conducive it is to the clamping of the clamp.
  • the dimension of the first connecting portion 51 along the second direction Y is D1
  • the dimension of the overlapping area of the projections of the first concave portion 5311 and the second concave portion 5312 in the first direction X is D2
  • D2 and D1 satisfy the relationship 0.3 ⁇ D2/D1 ⁇ 0.9.
  • D3/D1 includes 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9.
  • the dimension D1 of the first connecting portion 51 along the second direction Y may satisfy 5 mm ⁇ D1 ⁇ 100 mm.
  • D1 includes 5 mm, 10 mm, 20 mm, 30 mm, 50 mm, and 100 mm.
  • D2/D1 is limited to 0.3 ⁇ D2/D1 ⁇ 0.9, and the extension length of the two grooves along the first direction X is reduced as much as possible while satisfying the limiting effect of the recess on the adapter 5050.
  • the first recess 5311 and the second recess 5312 are symmetrically arranged.
  • the symmetrical first recess 5311 and the second recess 5312 are conducive to the clamping or limiting of the clamp or other components, thereby improving the positioning accuracy.
  • the adapter 50 can be subjected to the force in the opposite direction, thereby reducing the possibility of the position of the adapter 50 changing due to the force on one side of the adapter 50 being greater than the force on the other side, thereby improving the positioning stability of the adapter 50.
  • the size of the first connection portion 51 along the second direction Y is D1.
  • the minimum distance between the edge of the second connection portion 52 away from the first connection portion 51 and the positioning structure 53 is D3, and D1 and D3 satisfy the relationship 0.1 ⁇ D3/D1 ⁇ 1.
  • D3/D1 includes 0.1, 0.2, 0.5 and 1.
  • the relationship between D1 and D3 is defined as 0.1 ⁇ D3/D1 ⁇ 1 to balance the limiting effect of the groove and the space occupied by the positioning structure 53.
  • the first connection portion 51 includes a tab connection region 511 connected to the tab, and the positioning structure 53 is spaced apart from the tab connection region 511 along the first direction X.
  • the tab connection region 511 is spaced apart from the positioning structure 53 , thereby preventing the positioning structure 53 from affecting the tab connection region 511 .
  • the minimum distance between the positioning structure 53 and the tab connection area 511 is D4
  • the size of the tab connection area 511 along the first direction X is D5
  • D4 and D5 satisfy the relationship 0.1 ⁇ D4/D5 ⁇ 1.
  • D4/D5 includes 0.1, 0.2, 0.5 and 1.
  • the value of D4/D5 is limited to 0.1 ⁇ D4/D5 ⁇ 1, balancing the distance between the groove and the tab connection area 511.
  • the dimension of the tab connection region 511 along the second direction Y is D6, and D6 and D1 satisfy the relationship of 0.4 ⁇ D6/D1 ⁇ 0.6.
  • D6/D1 includes 0.4, 0.5 and 0.6.
  • the positioning structure 53 is applied to the value of the dimension of the pole tab connection area 511 along the second direction Y and the dimension of the first connection portion 51 along the second direction Y of 0.4 ⁇ D6/D1 ⁇ 0.6.
  • the positioning structure 53 can also be applied to batteries with a battery cell 1 width of 10 mm to 40 mm.
  • the wider the width of the battery cell 1 is, the wider the width of the pole lug is, and the possibility of displacement of the adapter 50 is smaller during the connection between the adapter 50 and the pole lug;
  • the narrower the width of the battery cell 1 is, the smaller the width of the pole lug is, and the corresponding first connection part 51 of the adapter 50 can be the pole lug connection area 511, so during the connection between the adapter 50 and the pole lug, even if the adapter 50 is displaced, the impact on the welding effect between the adapter 50 and the pole lug and the current carrying capacity of the adapter 50 will be smaller.
  • FIG. 9 is a schematic diagram of the structure of adapters provided in some other embodiments of the present application.
  • a fuse portion 54 is provided between the first connection portion 51 and the second connection portion 52.
  • the size of the fuse portion 54 is smaller than the size of the first connection portion 51, and in the second direction Y, the size of the fuse portion 54 is smaller than the size of the second connection portion 52.
  • the fuse portion 54 is formed by a recessed edge of the adapter 50.
  • the fuse portion 54 may also be formed by setting a through hole structure 541 or a blind hole structure in the area between the first connection portion 51 and the second connection portion 52.
  • the fuse part 54 is a solid structure between the edge of the through hole structure 541 along the second direction Y and the first side 542 in the adapter 50.
  • the size of the fuse part 54 along the second direction Y refers to the physical size of the adapter 50 in the area where the fuse part 54 is set.
  • the size of the fuse part 54 in the second direction Y is smaller than the size of the first connection part 51 and the second connection part 52 in the second direction Y, which can ensure that the circuit can be disconnected immediately when a large current passes through the adapter 50, reducing the risk of thermal runaway.
  • the present application further provides a battery cell 1 including a housing 10, an electrode terminal 20, an electrode assembly 40 and an adapter 50.
  • the housing 10 is provided with a receiving cavity.
  • the electrode terminal 20 is provided in the housing 10.
  • the electrode assembly 40 is received in the receiving cavity, and the electrode assembly 40 includes a tab.
  • a plurality of adapters 50 of any of the above embodiments, the adapter 50 being electrically connected to the electrode terminal 20 and the tab.
  • the present application also provides a battery, comprising a plurality of battery cells 1 according to any of the above embodiments.
  • the present application further provides an electrical device, comprising a plurality of battery cells 1 according to any of the above embodiments, wherein the battery cells 1 are used to provide electrical energy.
  • the present application provides an adapter 50 including a first connection portion 51, a second connection portion 52 and a positioning structure 53.
  • the first connection portion 51 is used to electrically connect to the tab of the battery cell 1.
  • the first connection portion 51 and the second connection portion 52 are arranged along the first direction X, and the second connection portion 52 is used to electrically connect to the electrode terminal 20 of the battery cell 1.
  • the positioning structure 53 provides the adapter 50 with at least a position limit in the first direction X and a position limit in the second direction Y.
  • the positioning structure 53 includes a recess including a first recess 5311 and a second recess 5312 that are opposite to each other along the second direction Y, and the first recess 5311 cooperates with the second recess 5312 and the clamp to provide the adapter 50 with at least a position limit in the second direction Y.
  • At least one of the first recess 5311 and the second recess 5312 includes a positioning edge, which intersects the first direction X and/or the second direction Y. The positioning edge and the edge profile of the adapter 50 cooperate with the clamp or other components to provide positioning of the adapter 50 in multiple directions.

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

Abstract

本申请实施例提供一种转接件、电池单体、电池以及用电装置。转接件包括第一连接部、第二连接部以及定位结构。第一连接部用于与电池单体的极耳电连接。第一连接部与第二连接部沿第一方向排布设置，第二连接部用于与电池单体的电极端子电连接。定位结构对转接件至少提供在第一方向上的相向限位以及在第二方向上的限位，第一方向与第二方向相交。本申请实施例提供的转接件旨在解决转接件在与极耳连接过程以及电池中的其他制程过程中转接件发生移位的问题。

Description

转接件、电池单体、电池以及用电装置
相关申请的交叉引用
本申请要求享有于2022年09月29日提交的名称为“转接件、电池单体、电池以及用电装置”的中国专利申请第202222597331.0号的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，并且更具体地，涉及一种转接件、电池单体、电池以及用电装置。
背景技术
电池单体广泛用于电子设备，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。
如何提高电池单体的优率，是电池技术的一个重要研究方向。
发明内容
本申请提供了一种转接件、电池单体、电池以及用电装置。其能够改善焊接过程的稳定性，提高电池的安全性。
第一方面，本申请实施例提供了一种转接件，转接件包括第一连接部、第二连接部以及定位结构。第一连接部用于与电池单体的极耳电连接。第一连接部与第二连接部沿第一方向排布设置，第二连接部用于与电池单体的电极端子电连接。定位结构对转接件至少提供在第一方向上的相向限位以及在第二方向上的限位，第一方向与第二方向相交。
上述方案中，通过在转接件上设置定位结构，使得其他部件与定位结构配合时，对转接件进行多个方向的限位，从而减小转接件在与极耳连接过程以及电池中的其他制程过程中转接件发生移位的可能性，提高电池的安全性。
在一些实施例中，沿第二方向，定位结构和第二连接部的投影至少部分重叠。
上述方案中，定位结构与夹具或者电池中其他部件配合，能够对转接件提供多个方向上的定位，定位结构靠近第二连接部设置，使得转接件与其他部件配合时受到的作用力能够被第二连接部与定位结构之间的区域吸收，减小该作用力对第一连接部产生影响的可能性，进而减小该作用力对极耳产生影响的可能性。
在一些实施例中，定位结构包括凹部，凹部位于转接件沿第二方向上的至少一侧， 凹部包括至少一条定位边，定位边与第一方向和/或第二方向相交分布。
上述方案中，凹部中的定位边与夹具或者电池中的其他部件配合，实现对转接件提供第一方向和/或第二方向上至少一个方向的限位。
在一些实施例中，定位边包括第一定位边，第一定位边平行于第二连接部远离第一连接部的边缘。
上述方案中，第一定位边平行于第二连接部远离第一连接部的边缘，夹具或者其他部件同时与第一定位边和第二连接部远离第一连接部的边缘配合，使得夹具或者其他部件对转接件的限位方向与转接件中第一连接部和第二连接部的分布方向相同，从而实现第一方向上的双向限位。
在一些实施例中，定位边还包括第二定位边，第一定位边和第二定位边之间的夹角α满足30°≤α≤135°。
上述方案中，第一定位边与第二定位边之间的夹角越小，第一定位边与第二定位边之间的空间越小，那么夹具或者其他部件在与第一定位边和第二定位边配合时，夹具或者其他部件与第一定位边和第二定位边之间的接触面积越小；第一定位边与第二定位边之间的夹角越大，会减小第二连接部和/或第一连接部与凹部之间的连接区域，降低第一连接部和第二连接部之间的连接强度。在本技术方案中，将夹角限定为30°≤α≤135°，以平衡其他部件与转接件的接触面积以及第一连接部和第二连接部之间的连接强度。
在一些实施例中，定位结构被配置为能够和夹具配合，以限制转接件在第一方向上的移动。
上述方案中，定位结构中第一定位边和第二定位边中的至少一者与夹具配合，以限制转接件在第一方向上的移动，降低转接件沿第一方向移动的可能性。
在一些实施例中，凹部沿第二方向相对的一侧与凹部被配置为能够和夹具配合，限制转接件在第二方向上的移动。
上述方案中，凹部与凹部沿第二方向相对的一侧和夹具配合，从而限制转接件沿第二方向移动，降低转接件沿第二方向移动的可能性。
在一些实施例中，凹部包括第一凹部和第二凹部，第一凹部和第二凹部分别位于转接件在第二方向上相对的两侧。
上述方案中，在转接件上沿第二方向设置两个相对的凹部，增加转接件与其他部件的接触面积以及接触方向，从而提高其他部件对转接件限位的可靠性。
在一些实施例中，沿第二方向，第一凹部和第二凹部的投影至少部分重叠。
上述方案中，沿第二方向，第一凹部的投影和第二凹部的投影至少部分重叠，从而降低两个凹部在转接件上占用的空间，并且两个凹部在第二方向上的重合面积越多，那么越有利于夹具的夹持。
在一些实施例中，第一连接部沿第二方向的尺寸为D1，第一凹部和第二凹部的投影重叠区域在第一方向上的尺寸为D2，D2和D1满足关系，0.3≤D2/D1≤0.9。
上述方案中，D2/D1的值越小，那么两个凹部与其他部件配合时的限位效果越差；D2/D1的值越大，那么凹槽沿第一方向X的长度越长，造成凹槽中的部分区域起不到限 位作用，并且占用转接件上的空间越多。在本技术方案中，将D2/D1限定为0.3≤D2/D1≤0.9，在满足凹部对转接件的限位效果的前提下，尽可能的降低两个凹槽沿第一方向X的延伸长度。
在一些实施例中，第一凹部和第二凹部对称设置。
上述方案中，在转接件与夹具或者其他部件进行配合时，对称的第一凹部和第二凹部有利于夹具或者其他部件的夹持或者限位，进而提高定位精度。并且对称的第一凹部和第二凹部在受到夹具或者其他部件的作用力时，能够使转接件受到相对方向的作用力，减小转接件中一侧作用力大于另一侧作用力导致的转接件位置发生改变的可能性，提高转接件的定位稳定性。
在一些实施例中，第一连接部沿第二方向的尺寸为D1。沿第一方向，第二连接部远离第一连接部的边缘与定位结构的最小距离为D3，D1和D3满足关系0.1≤D3/D1≤1。
上述方案中，D3/D1的值越小，那么凹槽的强度越低，与其他部件配合时的限位效果越差；D3/D1的值越大，那么定位结构与第二连接部远离第一连接部的边缘之间的距离越大，在电池中占用的空间越多。在本技术方案中，将D1和D3的关系限定为0.1≤D3/D1≤1，以平衡凹槽的限位效果和定位结构的占用空间。
在一些实施例中，第一连接部包括与极耳连接的极耳连接区域，定位结构与极耳连接区域沿第一方向间隔设置。
上述方案中，极耳连接区域与定位结构间隔设置，从而避免定位结构对极耳连接区域影响。
在一些实施例中，沿第一方向，定位结构与极耳连接区域的最小距离为D4，极耳连接区域沿第一方向的尺寸为D5，D4和D5满足关系，0.1≤D4/D5≤1。
上述方案中，D4/D5的值越小，那么转接件与极耳连接时，夹具与极耳连接区域越近，如果D4/D5的值过小，那么夹具会对极耳连接区域造成干涉；D4/D5的值越大，那么凹槽与极耳连接区域之间的距离越大，导致转接件的尺寸增加，占用电池中的空间越大。在本技术方案中，将D4/D5的值限定为0.1≤D4/D5≤1，在平衡凹槽与极耳连接区域之间的距离。
在一些实施例中，第一连接部和第二连接部之间具有熔断部，在第二方向上，熔断部的尺寸小于第一连接部的尺寸，且在第二方向上，熔断部的尺寸小于第二连接部的尺寸。
上述方案中，熔断部在第二方向上的尺寸同时小于第一连接部和第二连接部在第二方向上的尺寸，可以保证转接件在通过大电流时，电路能够即使断开，降低热失控发生的风险。
第二方面，本申请实施例还提供了一种电池单体，包括外壳、电极端子以及电极组件。外壳设置有容纳腔。电极端子设置于外壳。电极组件，容纳于容纳腔内，电极组件包括极耳。至少一个第一方面任一实施例的转接件。
第三方面，本申请实施例还提供了一种电池，包括第二方面任一实施例的电池单体，电池用于提供电能。
第四方面，本申请实施例还提供了一种用电装置，包括第二方面任一实施例的电 池单体，电池单体用于提供电能。
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
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
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爆炸示意图；
图3为图2所示的电池模块的结构示意图；
图4为图3所示的电池单体的爆炸示意图；
图5为本申请一些实施例提供的转接件的结构示意图；
图6为图5所示的转接件在方框Q处的放大示意图；
图7为本申请又一些实施例提供的转接件的结构示意图；
图8为本申请又一些实施例提供的转接件的结构示意图；
图9为本申请又一些实施例提供的转接件的结构示意图。
在附图中，附图并未按照实际的比例绘制。
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；400、箱体；401、第一箱体部；402、第二箱体部；403、容纳空间；500、电池模块；
1、电池单体；
10、外壳；11、壳体；12、端盖；
20、电极端子；21、正极电极端子；22负极电极端子；
30、泄压机构；
40、电极组件；41、本体部；42、极耳；
50、转接件；51、第一连接部；511、极耳连接区域；52、第二连接部；53、定位结构；531、凹部；531a、第一定位边；531b、第二定位边；5311、第一凹部；5312、第二凹部；54、熔断部；541、通孔结构；542、第一边；
X、第一方向；Y、第二方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例 中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；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。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
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。电池单体一般按封装的方式分成三种：圆柱电池单体、方形电池单体和软包电池单体，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。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和电解液，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涂覆区和连接于正极涂覆区的正极极耳，正极涂覆区涂覆有正极活性物质层， 正极极耳未涂覆正极活性物质层。以锂离子电池单体为例，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涂覆区和连接于负极涂覆区的负极极耳，负极涂覆区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聚丙烯(polypropylene，PP)或聚乙烯(polyethylene，PE)等。
电池单体还包括外壳、电极端子和转接件，外壳内部形成用于容纳电极组件的容纳腔，电极端子安装在外壳上。外壳可以从外侧保护电极组件，以避免外部的异物影响电极组件的充电或放电。电极端子用于与电极组件的极耳电连接，以将电极组件产生的电能引出。转接件用于连接电极端子和极耳，以将电极端子与极耳电连接。
在电池单体的装配过程中，需要将转接件连接到极耳和电极端子。示例性地，在连接转接件和极耳时，需要对转接件进行定位，以降低转接件在装配过程中的窜动。
在相关技术中，通常会利用夹具抵住转接件相对的两个边缘，以对转接件进行定位。
然而，发明人注意到，在装配过程中，转接件相对于极耳仍是会发生一定程度的抖动，导致转接件与极耳之间的相对位置发生偏移，造成转接件与极耳的连接位置出现偏差，影响产品的优率，易引发转接件与极耳之间连接失效的风险。
有鉴于此，本申请实施例提供了一种技术方案。在该技术方案中，转接件包括第一连接部、第二连接部以及定位结构。第一连接部用于与电池单体的极耳电连接。第一连接部与第二连接部沿第一方向排布设置，第二连接部用于与电池单体的电极端子电连接。定位结构对转接件至少提供在第一方向上的相向限位以及在第二方向上的限位，第一方向与第二方向相交。这种结构使得转接件在与其他部件进行配合时，减小转接件与极耳之间的相对位置发生移位的风险，提高电池的安全性。
本申请实施例描述的技术方案适用于电池以及使用电池的用电设备。
用电设备可以是车辆、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设备不做特殊限制。
以下实施例为了方便说明，以用电设备为车辆为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆的结构示意图，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的爆炸示意图，电池100包括箱体和电池单体1(图2未示出)，电池单体1容纳于箱体内。
箱体用于容纳电池单体1，箱体可以是多种结构。在一些实施例中，箱体可以包括第一箱体部401和第二箱体部402，第一箱体部401与第二箱体部402相互盖合，第一箱体部401和第二箱体部402共同限定出用于容纳电池单体1的容纳空间403。第二箱体部402可以是一端开口的空心结构，第一箱体部401为板状结构，第一箱体部401盖合于第二箱体部402的开口侧，以形成具有容纳空间403的箱体；第一箱体部401和第二箱体部402也均可以是一侧开口的空心结构，第一箱体部401的开口侧盖合于第二箱体部402的开口侧，以形成具有容纳空间403的箱体。当然，第一箱体部401和第二箱体部402可以是多种形状，比如，圆柱体、长方体等。
为提高第一箱体部401与第二箱体部402连接后的密封性，第一箱体部401与第二箱体部402之间也可以设置密封件，比如，密封胶、密封圈等。
假设第一箱体部401盖合于第二箱体部402的顶部，第一箱体部401亦可称之为上箱盖，第二箱体部402亦可称之为下箱体。
在电池100中，电池单体1可以是一个，也可以是多个。若电池单体1为多个，多个电池单体1之间可串联或并联或混联，混联是指多个电池单体1中既有串联又有并联。多个电池单体1之间可直接串联或并联或混联在一起，再将多个电池单体1构成的整体容纳于箱体内；当然，也可以是多个电池单体1先串联或并联或混联组成电池模块500，多个电池模块500再串联或并联或混联形成一个整体，并容纳于箱体内。
在一些实施例中，请参照图3，图3为图2所示的电池模块500的结构示意图。电池单体1为多个，多个电池单体1先串联或并联或混联组成电池模块500。多个电池模块500再串联或并联或混联形成一个整体，并容纳于箱体内。
电池模块500中的多个电池单体1之间可通过汇流部件实现电连接，以实现电池模块500中的多个电池单体1的并联或串联或混联。
请参照图4，图4为图3所示的电池单体1的爆炸示意图。本申请实施例提供的电池单体1包括电极组件40和外壳10，电极组件40容纳于外壳10内。
在一些实施例中，外壳10还可用于容纳电解质，例如电解液。外壳10可以是多种结构形式。
在一些实施例中，外壳10可以包括壳体11和端盖12，壳体11为一侧开口的空心结构，端盖12盖合于壳体11的开口处并形成密封连接，以形成用于容纳电极组件40和电解质的密封空间。
在组装电池单体1时，可先将电极组件40放入壳体内，再将端盖12盖合于壳体11的开口，然后经由端盖12上的电解质注入口将电极质注入壳体11内。
壳体11可以是多种形状，比如，圆柱体、长方体等。壳体11的形状可根据电极组 件40的具体形状来确定。比如，若电极组件40为圆柱体结构，则可选用为圆柱体壳体11；若电极组件40为长方体结构，则可选用长方体壳体11。当然，端盖12也可以是多种结构，比如，端盖12为板状结构、一端开口的空心结构等。示例性的，在图4中，壳体11为长方体结构，端盖12为板状结构，端盖12盖合于壳体11顶部的开口处。
在一些实施例中，电池单体1包括设置于外壳10的电极端子20，电极端子20的至少部分露出到电池单体1的外部，以便于与其它构件(例如汇流部件)连接，进而将电极组件40产生的电能引出。
电极端子20可以是外壳10的一部分，也可以是安装在外壳10上的独立的构件。
在一些实施例中，电极端子20设置为多个，多个电极端子20包括正极电极端子21和负极电极端子22。正极电极端子21和负极电极端子22均用于与电极组件电连接，以输出电极组件所产生的电能。在一些实施例中，电池单体1还可以包括泄压机构30。正极电极端子21、负极电极端子22和泄压机构30均安装于端盖上。泄压机构30用于在电池单体1的内部压力或温度达到预定值时泄放电池单体1内部的压力。
示例性的，泄压机构30位于正极电极端子21和负极电极端子22之间，泄压机构30可以是诸如防爆阀、防爆片、气阀、泄压阀或安全阀等部件。
当然，在一些实施例中，外壳也可以是其他结构，比如，外壳包括壳体和两个端盖，壳体为相对的两侧开口的空心结构，一个端盖对应盖合于壳体的一个开口处并形成密封连接，以形成用于容纳电极组件和电解质的密封空间。在这种结构中，正极电极端子21和负极电极端子22可安装在同一个端盖上，也可以安装在不同的端盖上；可以是一个端盖上安装有泄压机构30，也可以是两个端盖上均安装有泄压机构30。
需要说明的是，在电池单体1中，容纳于外壳内的电极组件可以是一个，也可以是多个。示例性的，在图4中，电极组件为两个。
电极组件40包括本体部41和凸出于本体部41的极耳42。示例性地，电极组件40包括正极极耳和负极极耳，正极极耳可以是正极极片未涂覆活性物质层的部分，负极极耳可以是负极极片未涂覆活性物质层的部分，正极极耳和负极极耳将本体部41产生的电能导出。正极极耳和负极极耳可以共同位于本体部41的一端或者是分别位于本体部41的相反的两端。
接下来结合附图对转接件的具体结构进行详细阐述。
图5为本申请一些实施例提供的转接件的结构示意图。图6为图5所示的转接件在方框Q处的放大示意图。图7为本申请又一些实施例提供的转接件的结构示意图。图8为本申请又一些实施例提供的转接件的结构示意图。
如图4至图8所示，本申请实施例的转接件50包括第一连接部51、第二连接部52以及定位结构53。第一连接部51用于与电池单体1的极耳电连接。第一连接部51与第二连接部52沿第一方向X排布设置，第二连接部52用于与电池单体1的电极端子20电连接。定位结构53对转接件50至少提供在第一方向X上的相向以及在第二方向Y上的限位，第一方向X与第二方向Y相交。转接片可用于连接正极极耳和正极电极端子21，也可用于连接负极极耳和负极电极端子22。
转接件50沿厚度方向的投影形状包括矩形、圆形、椭圆形、长圆形或其它形状。
第一连接部51用于与电池单体1的极耳电连接。本申请实施例不限制第一连接部51与极耳的连接方式，例如，第一连接部51可通过焊接、粘接、卡接或其它方式连接于极耳。示例性的，第一连接部51与电池单体1的极耳通过超声波焊接的方式连接。
第二连接部52用于与电池单体1的电极端子20电连接，示例性的，第二连接部52与电池单体1的电极端子20通过激光焊接的方式连接。
在一些示例中，以第一连接部指向第二连接部的方向为第一方向的正方向为例，定位结构对转接件提供的第一方向相向的限位为第一方向的正方向的限位以及第一方向的负方向的限位。以此类推，第二方向同样也可以分为正方向和负方向。定位结构可以对转接件提供沿第一方向的正方向和负方向以及第二方向正方向和负方向以及第二方向正方向和负方向的四个方向的限位。
示例性地，第一连接部51和第二连接部52分设于转接件50沿第一方向X的两端，第一连接部51与极耳连接时，夹具会位于远离第一连接部51的区域，避免夹具干扰第一连接部51与极耳的连接过程。
本申请实施例不限制定位结构53的具体结构，例如，定位结构53可包括凸部、凹部、孔、缺口或其它结构。
在本申请的一些示例中，转接件50中与其他部件配合的定位结构53可以是在转接件50上有多个定位面与其他部件配合限位，示例性的，其他部件分别抵住多个定位面；也可以是在转接件50上有多个定位孔与其他部件配合限位，示例性的，其他部件分别嵌套多个定位孔；也可以是在转接件50上有多个定位凹槽与其他部件配合限位，示例性的，其他部件分别与多个定位凹槽卡接；也可以是在转接件50上有定位面、定位孔、定位凹槽中的两个或多个组合来与其他部件配合限位。
在本申请实施例中，通过在转接件50上设置定位结构53，使得其他部件与定位结构53配合时，对转接件50进行多个方向的限位，从而减小转接件50在与极耳连接过程以及电池中的其他制程过程中转接件50发生移位的可能性，提高电池的安全性。
在一些实施例中，如图5至图8所示，沿第二方向Y，定位结构53和第二连接部52的投影至少部分重叠。可选的，如图5和图6所示，沿第二方向Y，定位结构53与第二连接部52的投影重叠，且定位结构53的投影位于第二连接部52的投影内。如图8所述，沿第二方向Y，定位结构53与第二连接部52的投影部分重叠。
在本申请的一些实施例中，定位结构53与夹具或者电池中其他部件配合，能够对转接件50提供多个方向上的定位，定位结构53靠近第二连接部52设置，使得转接件50与其他部件配合时受到的作用力能够被第二连接部52与定位结构53之间的区域吸收，减小该作用力对第一连接部51产生影响的可能性，进而减小该作用力对极耳42产生影响的可能性。
在一些实施例中，请继续参阅图5至图8，定位结构53包括凹部531，凹部531位于转接件50沿第二方向Y上的至少一侧，凹部531包括至少一条定位边，定位边与第一方向X和/或第二方向Y相交分布。
在一些可选的实施例中，凹部531包括由转接件50的一侧边缘朝向相对的另一侧边缘凹陷。本申请实施例不限制凹部531在厚度方向上投影的形状，例如凹部531包括 矩形、三角形、半圆形或者其他形状。
本申请实施例不限制凹部531的数量，例如在转接件50沿第二方向Y相对的两侧中的一侧设置凹部531；在转接件50沿第二方向Y相对的两侧均设置凹部531；转接件50沿第二方向Y相对的两侧中的一侧设置多个沿第一方向X间隔的凹部531，能够保证凹部531对转接件50起到限位作用即可。
本申请实施例不限制定位边的数量，例如，凹部531中包括一条定位边、两条定位边、三条定位边或者多条定位边。
本申请实施例不限制定位边的延伸方向，例如，定位边沿与第一方向X相交的方向延伸；定位边沿与第二方向Y相交的方向延伸；定位边沿与第一方向X相交的方向，且定位边与第二方向Y平行的方向延伸；定位边沿与第一方向X平行的方向，且定位边与第二方向Y相交的方向延伸，能够保证凹部531对转接件50起到限位作用即可。
在本申请的实施例中，凹部531中的定位边与夹具或者电池中的其他部件配合，实现对转接件50提供第一方向X和/或第二方向Y上至少一个方向的限位。
在一些实施例中，如图5和图6所示，定位边包括第一定位边531a，第一定位边531a平行于第二连接部52远离第一连接部51的边缘。
在本申请的一些实施例中，第一定位边531a平行于第二连接部52远离第一连接部51的边缘，夹具或者其他部件同时与第一定位边531a和第二连接部52远离第一连接部51的边缘配合，使得夹具或者其他部件对转接件50的限位方向与转接件50中第一连接部51和第二连接部52的分布方向相同，从而实现第一方向X上的双向限位。
在一些实施例中，如图5和图6所示，定位边还包括第二定位边531b，第一定位边531a和第二定位边531b之间的夹角α满足30°≤α≤135°。
在本申请的一些实施例中，第一定位边531a与第二定位边531b之间的夹角越小，第一定位边531a与第二定位边531b之间的空间越小，那么夹具或者其他部件在与第一定位边531a和第二定位边531b配合时，夹具或者其他部件与第一定位边531a和第二定位边531b之间的接触面积越小；第一定位边531a与第二定位边531b之间的夹角越大，会减小第二连接部52和/或第一连接部51与凹部531之间的连接区域，降低第一连接部51和第二连接部52之间的连接强度。在本实施例中，将夹角限定为30°≤α≤135°，以平衡其他部件与转接件50的接触面积以及第一连接部51和第二连接部52之间的连接强度。
在一些实施例中，定位结构53被配置为能够和夹具配合，以限制转接件50在第一方向X上的移动。
在本申请的一些实施例中，定位结构53中第一定位边531a和第二定位边531b中的至少一者与夹具配合，以限制转接件50在第一方向X上的移动，降低转接件50沿第一方向X移动的可能性。
在一些实施例中，请继续参阅图5至图8，第二连接部52远离第一连接部51的边缘和凹部531被配置为能够和夹具配合，以限制转接件50在第一方向X和第二方向Y上的移动。
在一些示例中，第二连接部52远离第一连接部51的边缘与凹部531中的第一定位 边531a和夹具配合，从而限制转接件50在第一方向X上的移动。在另一些示例中，第二连接部52远离第一连接部51的边缘与凹部531中的第二定位边531b和夹具配合，从而限制转接件50在第一方向X上的移动。
在一些示例中，凹部531与第二连接部52沿第二方向Y对应的边缘和夹具配合，从而限制转接件50在第二方向Y上的移动。
在本申请的一些实施例中，使用转接件50上的边缘轮廓与凹部531和夹具配合，从而简化定位结构53，降低转接件50的制程难度。
在一些实施例中，如图8所示，凹部531沿第二方向Y相对的一侧与凹部531被配置为能够和夹具配合，限制转接件50在第二方向Y上的移动。
在本申请的一些实施例中，凹部531与凹部531沿第二方向Y相对的一侧和夹具配合，从而限制转接件50沿第二方向Y移动，降低转接件50沿第二方向Y移动的可能性。
在一些实施例中，请继续参阅图5至图8，凹部531包括第一凹部5311和第二凹部5312，第一凹部5311和第二凹部5312分别位于转接件50在第二方向Y上相对的两侧。
在一些示例中，第一凹部5311沿转接件50厚度方向正投影的形状和第二凹部5312沿转接件50厚度方向正投影的形状相同，以使其他部件对转接件50两侧的作用力相同，降低两侧受到的作用力不均时，受到作用力大的一侧周边的其他区域造成损坏的可能性。在另一些示例中，第一凹部5311沿转接件50厚度方向正投影的形状和第二凹部5312沿转接件50厚度方向正投影的形状或尺寸不同，以使转接件50能够更加灵活的和不同的部件进行配合，从而对转接件50进行限位。
在本申请的一些实施例中，在转接件50上沿第二方向Y设置两个相对的凹部，增加转接件50与其他部件的接触面积以及接触方向，从而提高其他部件对转接件50限位的可靠性。
在一些实施例中，请继续参阅图5至图8，沿第二方向Y，第一凹部5311和第二凹部5312的投影至少部分重叠。
在一些示例中，沿第二方向Y，第一凹部5311的投影和第二凹部5312的投影是重叠的，示例性的，第一凹部5311的投影位于第二凹部5312的投影内；第二凹部5312的投影位于第一凹部5311的投影内；第一凹部5311的投影和第二凹部5312的投影是重合的。在另一些示例中，沿第二方向Y，第一凹部5311的投影和第二凹部5312的投影是部分重叠的。
在本申请的一些实施例中，沿第二方向Y，第一凹部5311的投影和第二凹部5312的投影至少部分重叠，从而降低两个凹部在转接件50上占用的空间，并且两个凹部在第二方向Y上的重合面积越多，那么越有利于夹具的夹持。
在一些实施例中，如图8所示，第一连接部51沿第二方向Y的尺寸为D1，第一凹部5311和第二凹部5312的投影重叠区域在第一方向X上的尺寸为D2，D2和D1满足关系，0.3≤D2/D1≤0.9。示例性的，D3/D1包括0.3、0.4、0.5、0.6、0.7、0.8和0.9。
可选的，第一连接部51沿第二方向Y的尺寸为D1可以满足5mm≤D1≤100mm。示 例性的，D1包括5mm、10mm、20mm、30mm、50mm和100mm。
在本申请的一些实施例中，D2/D1的值越小，那么两个凹部与其他部件配合时的限位效果越差；D2/D1的值越大，那么凹槽沿第一方向X的长度越长，造成凹槽中的部分区域起不到限位作用，并且占用转接件5050上的空间越多。在本实施例中，将D2/D1限定为0.3≤D2/D1≤0.9，在满足凹部对转接件5050的限位效果的前提下，尽可能的降低两个凹槽沿第一方向X的延伸长度。
在一些实施例中，如图7所示，第一凹部5311和第二凹部5312对称设置。
在本申请的实施例中，在转接件50与夹具或者其他部件进行配合时，对称的第一凹部5311和第二凹部5312有利于夹具或者其他部件的夹持或者限位，进而提高定位精度。并且对称的第一凹部5311和第二凹部5312在受到夹具或者其他部件的作用力时，能够使转接件50受到相对方向的作用力，减小转接件50中一侧作用力大于另一侧作用力导致的转接件50位置发生改变的可能性，提高转接件50的定位稳定性。
在一些实施例中，请继续参阅图5至图8，第一连接部51沿第二方向Y的尺寸为D1。沿第一方向X，第二连接部52远离第一连接部51的边缘与定位结构53的最小距离为D3，D1和D3满足关系0.1≤D3/D1≤1。示例性的，D3/D1包括0.1、0.2、0.5和1。
在本申请的一些实施例中，D3/D1的值越小，那么凹槽的强度越低，与其他部件配合时的限位效果越差；D3/D1的值越大，那么定位结构53与第二连接部52远离第一连接部51的边缘之间的距离越大，在电池中占用的空间越多。在本实施例中，将D1和D3的关系限定为0.1≤D3/D1≤1，以平衡凹槽的限位效果和定位结构53的占用空间。
在一些实施例中，如图8所示，第一连接部51包括与极耳连接的极耳连接区域511，定位结构53与极耳连接区域511沿第一方向X间隔设置。
在本申请的一些实施例中，极耳连接区域511与定位结构53间隔设置，从而避免定位结构53对极耳连接区域511影响。
在一些实施例中，请继续参阅图5至图8，沿第一方向X，定位结构53与极耳连接区域511的最小距离为D4，极耳连接区域511沿第一方向X的尺寸为D5，D4和D5满足关系，0.1≤D4/D5≤1。示例性的，D4/D5包括0.1、0.2、0.5和1。
在本申请的一些实施例中，D4/D5的值越小，那么转接件50与极耳连接时，夹具与极耳连接区域511越近，如果D4/D5的值过小，那么夹具会对极耳连接区域511造成干涉；D4/D5的值越大，那么凹槽与极耳连接区域511之间的距离越大，导致转接件50的尺寸增加，占用电池中的空间越大。在本实施例中，将D4/D5的值限定为0.1≤D4/D5≤1，在平衡凹槽与极耳连接区域511之间的距离。
在一些实施例中，如图8所示，极耳连接区域511沿第二方向Y的尺寸为D6，D6和D1满足关系，0.4≤D6/D1≤0.6。示例性的，D6/D1包括0.4、0.5和0.6。
在本申请的一些实施例中，极耳连接区域511沿第二方向Y的尺寸占据第一连接部51沿第二方向Y的尺寸的一半左右的情况下，转接件50与极耳连接过程中，移位效果是较为明显的，在本实施例中，定位结构53应用于极耳连接区域511沿第二方向Y的尺寸与第一连接部51沿第二方向Y的尺寸的值为0.4≤D6/D1≤0.6。
需要说明的是，该定位结构53还可以应用于电池单体1宽度为10mm～40mm的电 池中，电池单体1的宽度越宽，那么极耳的宽度也随之增加，那么转接件50与极耳连接过程中，转接件50发生移位的可能性越小；电池单体1的宽度越窄，那么极耳的宽度也会随之减小，与之对应的转接件50的第一连接部51均可以为极耳连接区域511，那么在转接件50与极耳连接过程中，转接件50即使发生移位，对转接件50与极耳之间焊接效果以及转接件50的过流能力的影响越小。
图9为本申请又一些实施例提供的转接件的结构示意图。
在一些实施例中，如图9所示，第一连接部51和第二连接部52之间具有熔断部54，在第二方向Y上，熔断部54的尺寸小于第一连接部51的尺寸，且在第二方向Y上，熔断部54的尺寸小于第二连接部52的尺寸。
本申请实施例不限制熔断部54的位置，例如，熔断部54是由转接件50的边缘凹陷形成的；熔断部54也可以是在第一连接部51和第二连接部52之间的区域设置通孔结构541或者盲孔结构后形成的。
需要说明的是，如图所示，以熔断部54在转接件50中设置通孔结构541为例，熔断部54为通孔结构541沿第二方向Y的边缘与转接件50中的第一边542之间的实体结构。
可以理解的是，熔断部54沿第二方向Y的尺寸指的是转接件50在熔断部54设置区域的实体尺寸。熔断部54在第二方向Y上的尺寸同时小于第一连接部51和第二连接部52在第二方向Y上的尺寸，可以保证转接件50在通过大电流时，电路能够即使断开，降低热失控发生的风险。
在一些实施例中，本申请还提供了一种电池单体1包括外壳10、电极端子20、电极组件40以及转接件50。外壳10设置有容纳腔。电极端子20设置于外壳10。电极组件40容纳于容纳腔内，电极组件40包括极耳。多个以上任一实施例的转接件50，转接件50与电极端子20和极耳电连接。
在一些实施例中，本申请还提供了一种电池，包括多个以上任一实施例的电池单体1。
在一些实施例中，本申请还提供了一种用电装置，包括多个以上任一实施例的电池单体1，电池单体1用于提供电能。
在一些实施例中，参照图4至图8，本申请提供了一种转接件50包括第一连接部51、第二连接部52以及定位结构53。第一连接部51用于与电池单体1的极耳电连接。第一连接部51与第二连接部52沿第一方向X排布设置，第二连接部52用于与电池单体1的电极端子20电连接。定位结构53对转接件50至少提供在第一方向X上的相向限位以及在第二方向Y的限位。定位结构53包括凹部包括沿第二方向Y相对的第一凹部5311和第二凹部5312，第一凹部5311与第二凹部5312和夹具配合，从而对转接件50提供至少第二方向Y相向的限位。第一凹部5311和第二凹部5312中的至少一者包括定位边，定位边与第一方向X和/第二方向Y相交分布，定位边和转接件50的边缘轮廓与夹具或者其他部件配合从而对转接件50提供多个方向的限位。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
最后应说明的是：以上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，或者对其中部分技术特征进行等同替换，但这些修改或者替换，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精神和范围。

Claims (18)

  1. 一种转接件，包括：
    第一连接部，用于与电池单体的极耳电连接；
    第二连接部，所述第一连接部与所述第二连接部沿第一方向排布设置，所述第二连接部用于与所述电池单体的电极端子电连接；
    定位结构，所述定位结构对所述转接件至少提供在所述第一方向上的相向限位以及在第二方向上的限位，所述第一方向与所述第二方向相交。
  2. 根据权利要求1所述的转接件，其中，沿所述第二方向，所述定位结构和所述第二连接部的投影至少部分重叠。
  3. 根据权利要求2所述的转接件，其中，所述定位结构包括凹部，所述凹部位于所述转接件沿所述第二方向上的至少一侧，所述凹部包括至少一条定位边，所述定位边与所述第一方向和/或所述第二方向相交分布。
  4. 根据权利要求3所述的转接件，其中，所述定位边包括第一定位边，所述第一定位边平行于所述第二连接部远离所述第一连接部的边缘。
  5. 根据权利要求4所述的转接件，其中，所述定位边还包括第二定位边，所述第一定位边和所述第二定位边之间的夹角α满足30°≤α≤135°。
  6. 根据权利要求1-5任一项所述的转接件，其中，所述定位结构被配置为能够和夹具配合，以限制所述转接件在所述第一方向上的移动。
  7. 根据权利要求3所述的转接件，其中，所述凹部沿所述第二方向相对的一侧与所述凹部被配置为能够和夹具配合，限制所述转接件在所述第二方向上的移动。
  8. 根据权利要求7所述的转接件，其中，所述凹部包括第一凹部和第二凹部，所述第一凹部和所述第二凹部分别位于所述转接件在所述第二方向上相对的两侧。
  9. 根据权利要求8所述的转接件，其中，沿所述第二方向，所述第一凹部和所述第二凹部的投影至少部分重叠。
  10. 根据权利要求9所述的转接件，其中，所述第一连接部沿所述第二方向的尺寸为D1，所述第一凹部和所述第二凹部的投影重叠区域在所述第一方向上的尺寸为D2， D2和D1满足关系，0.3≤D2/D1≤0.9。
  11. 根据权利要求10所述的转接件，其中，所述第一凹部和所述第二凹部对称设置。
  12. 根据权利要求1-11任一项所述的转接件，其中，所述第一连接部沿所述第二方向的尺寸为D1，沿所述第一方向，所述第二连接部远离所述第一连接部的边缘与所述定位结构的最小距离为D3，D1和D3满足关系0.1≤D3/D1≤1。
  13. 根据权利要求1-12任一项所述的转接件，其中，所述第一连接部包括与所述极耳连接的极耳连接区域，所述定位结构与所述极耳连接区域沿所述第一方向间隔设置。
  14. 根据权利要求13所述的转接件，其中，沿所述第一方向，所述定位结构与所述极耳连接区域的最小距离为D4，所述极耳连接区域沿所述第一方向的尺寸为D5，D4和D5满足关系，0.1≤D4/D5≤1。
  15. 根据权利要求1-14任一项所述的转接件，其中，所述第一连接部和所述第二连接部之间具有熔断部，在所述第二方向上，所述熔断部的尺寸小于所述第一连接部的尺寸，且在所述第二方向上，所述熔断部的尺寸小于所述第二连接部的尺寸。
  16. 一种电池单体，包括：
    外壳，设置有容纳腔；
    电极端子，设置于所述外壳；
    电极组件，容纳于所述容纳腔内，所述电极组件包括极耳；
    如权利要求1-15任一项所述的转接件，所述转接件与所述电极端子和所述极耳电连接。
  17. 一种电池，包括如权利要求16所述的电池单体。
  18. 一种用电装置，包括如权利要求16所述的电池单体，所述电池单体用于提供电能。
PCT/CN2023/075456 2022-09-29 2023-02-10 转接件、电池单体、电池以及用电装置 WO2024066162A1 (zh)

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