WO2024000507A1 - 电池单体、电池及用电设备 - Google Patents

电池单体、电池及用电设备 Download PDF

Info

Publication number
WO2024000507A1
WO2024000507A1 PCT/CN2022/103108 CN2022103108W WO2024000507A1 WO 2024000507 A1 WO2024000507 A1 WO 2024000507A1 CN 2022103108 W CN2022103108 W CN 2022103108W WO 2024000507 A1 WO2024000507 A1 WO 2024000507A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
battery cell
positioning
electrode
electrode lead
Prior art date
Application number
PCT/CN2022/103108
Other languages
English (en)
French (fr)
Inventor
李贺远
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/CN2022/103108 priority Critical patent/WO2024000507A1/zh
Publication of WO2024000507A1 publication Critical patent/WO2024000507A1/zh

Links

Images

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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery cell, a battery and electrical equipment.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • the purpose of this application is to provide a battery cell, battery and electrical equipment.
  • the battery cell has high production efficiency.
  • the present application provides a battery cell, including: a casing, including a first wall; and an electrode lead-out member, at least partially disposed on a side of the first wall away from the interior of the battery cell, for Extract the electric energy of the battery cell; a first insulating member is at least partially disposed between the first wall and the electrode lead-out member to insulate and isolate the first wall and the electrode lead-out member; wherein, The first insulating part includes a first positioning part, and the electrode lead-out part includes a second positioning part. The first positioning part cooperates with the second positioning part to position the electrode lead-out part.
  • the first insulating member includes a first positioning part
  • the electrode lead-out part includes a second positioning part.
  • the positioning of the electrode lead-out part is achieved by the cooperation between the first positioning part and the second positioning part. It is convenient for positioning and assembly, improves the convenience of assembling the electrode lead-out part and the first insulating part, and improves the production efficiency of the battery cells.
  • one of the first positioning part and the second positioning part is a first protrusion, and the other of the first positioning part and the second positioning part is a First groove.
  • the first protrusion cooperates with the first groove, and the structure is simple, which facilitates the assembly of the first insulating member and the electrode lead-out member.
  • the projection of the first protrusion on the first wall is in a polygonal or elliptical shape.
  • the projection of the first protrusion on the first wall is polygonal or elliptical, which can limit the rotation of the electrode lead-out part relative to the first insulating part and improve the positioning accuracy of the electrode lead-out part and the first insulating part.
  • the number of the first positioning parts and the number of the second positioning parts are multiple, and the first positioning parts correspond to the second positioning parts one-to-one.
  • a plurality of first positioning parts and a plurality of second positioning parts cooperate to enable the assembly of the electrode lead-out part and the first insulating part at multiple positions, and to limit the rotation of the electrode lead-out part relative to the first insulating part.
  • the first insulating member has a high positioning effect on the electrode lead-out member.
  • the first insulating member includes a first surface facing away from the first wall, the first positioning portion is a first protrusion protruding from the first surface, and the third The second positioning part is a first groove.
  • the matching structure of the first groove and the first protrusion is simple in structure, easy to process, and easy to fit.
  • the cross-sectional area of the first protrusion gradually decreases from an end close to the first wall to an end away from the first wall.
  • the cross-sectional area of the first protrusion gradually decreases toward the end away from the first wall, which can guide the first protrusion into the first groove to reduce the insertion of the first protrusion.
  • the difficulty of the first groove is the above solution, along the thickness direction of the first wall, the cross-sectional area of the first protrusion gradually decreases toward the end away from the first wall, which can guide the first protrusion into the first groove to reduce the insertion of the first protrusion. The difficulty of the first groove.
  • the first groove extends to an edge of the electrode lead-out piece.
  • the first groove extends to the edge of the electrode lead-out piece, which facilitates processing of the first groove from the edge of the electrode lead-out piece and reduces the difficulty of processing.
  • the first groove penetrates the electrode lead-out part along a thickness direction of the electrode lead-out part.
  • the first groove penetrates the electrode lead-out piece, which facilitates processing and can reduce the weight of the electrode lead-out piece.
  • the height of the first protrusion protruding from the first surface is H1, which satisfies 0.5mm ⁇ H1 ⁇ 1.5mm.
  • the height H1 of the first protrusion protruding from the first surface satisfies the above range, so that the first protrusion and the first groove have a better positioning effect. If the height H1 of the first protrusion protruding from the first surface is less than 0.5 mm, the positioning effect between the first groove and the first protrusion is poor; if the height H1 of the first protrusion protruding from the first surface is greater than 1.5 mm, the first protrusion occupies a larger assembly space in the thickness direction of the first wall.
  • the battery cell further includes: two electrode terminals provided on the first wall; the electrode lead-out member is provided with two first through holes, and the two first through holes are The holes are respectively used to install two electrode terminals, and the second positioning part is located between the two first through holes.
  • the second positioning part is located between the two first through holes.
  • the second positioning part cooperates with the first positioning part to realize the positioning of the first insulating member to the electrode lead-out member, which can reduce the risk of the first through hole. Precision.
  • the first wall includes a third positioning portion
  • the first insulation member includes a fourth positioning portion
  • the third positioning portion cooperates with the fourth positioning portion to position the The first insulating piece is positioned.
  • the cooperation between the third positioning part and the fourth positioning part facilitates the positioning of the first wall to the first insulating member and improves assembly efficiency.
  • the area enclosed by the projection of the fourth positioning portion on the first wall is the same as the area of the first positioning portion on the first wall.
  • the area enclosed by the fourth positioning portion on the first wall at least partially overlaps with the projection of the first positioning portion on the first wall, so that the structure of the first insulating member is compact.
  • the projection of the fourth positioning portion on the first wall falls into the projection of the first positioning portion on the first wall.
  • the projection of the fourth positioning portion on the first wall falls within the projection of the first positioning portion on the first wall, so that the structure of the first insulating member is relatively compact.
  • the first insulating member includes a first surface facing away from the first wall and a second surface facing the first wall, and the first positioning portion is disposed on the first surface. , the fourth positioning portion is provided on the second surface.
  • the first positioning portion and the fourth positioning portion are respectively located on two opposite surfaces of the first insulating member, so that the first insulating member is in contact with the electrode lead-out member and the first wall in the thickness direction of the first wall. assembly.
  • the first wall includes a third surface facing away from the interior of the battery cell, the third positioning portion is a second protrusion protruding from the third surface, and the third The four positioning parts are second grooves.
  • the third positioning part is a second protrusion
  • the fourth positioning part is a second groove
  • the matching structure of the second protrusion and the second groove has a simple structure and is easy to process.
  • the second groove penetrates the first insulating member along a thickness direction of the first insulating member.
  • the second groove penetrates the first insulating member, which facilitates processing and can reduce the weight of the first insulating member.
  • the height of the second protrusion protruding from the third surface is H2, which satisfies 0.3mm ⁇ H2 ⁇ 1.5mm.
  • the height H2 of the second protrusion protruding from the third surface satisfies the above range, so that the second protrusion and the second groove have a better matching effect. If the height H2 of the second protrusion protruding from the third surface is too small, the positioning effect between the second groove and the second protrusion is poor; if the height H2 of the second protrusion protruding from the third surface is too large, then The second protrusion occupies a larger assembly space in the thickness direction of the first wall.
  • the battery cell further includes: two electrode terminals provided on the first wall; the first insulating member is provided with two second through holes, and the two second The through holes are respectively used to install two of the electrode terminals, and the fourth positioning part is located between the two second through holes.
  • the fourth positioning part is located between the two second through holes.
  • the fourth positioning part cooperates with the third positioning part to realize the positioning of the first insulating member by the first wall, which can reduce the risk of the second through hole. Precision.
  • the first wall is provided with two electrode mounting holes.
  • the two electrode mounting holes are used to install two electrode terminals respectively.
  • the aperture of the electrode mounting holes is D1, so
  • the aperture of the second through hole is D2, which satisfies D1 ⁇ D2.
  • the aperture D1 of the electrode mounting hole and the aperture D2 of the second through hole satisfy the above relationship, so that the processing accuracy of the second through hole is low.
  • the third positioning part can be realized. Positioning of the first insulating member by one wall.
  • 0.5mm ⁇ D2-D1 ⁇ 1mm is satisfied.
  • the difference between the diameter D2 of the second through hole and the diameter D1 of the electrode mounting hole satisfies the above relationship, and there is a certain assembly gap between the electrode terminal and the second through hole, which facilitates the assembly of the second through hole and the electrode terminal.
  • the difference between the diameter D2 of the second through hole and the diameter D1 of the electrode mounting hole is too small, it is not conducive to the assembly of the second through hole and the electrode terminal; if the difference between the diameter D2 of the second through hole and the diameter D1 of the electrode mounting hole is If the difference is too large, there will be a large gap between the outer peripheral surface of the electrode terminal and the hole wall of the second through hole, and the assembly effect of the first insulating member and the electrode terminal will be poor.
  • the housing includes a shell and a cover, the shell has an opening, the cover closes the opening, and the first wall is the cover.
  • the first wall is a cover, which facilitates the assembly of the first insulating member and the first wall.
  • the first wall is a wall with the largest area among all walls of the battery cell.
  • this application provides a battery, including: a box; a busbar contained in the box; a plurality of battery cells provided in any of the above embodiments, accommodated in the box, and a plurality of The battery cells are stacked along the thickness direction of the first wall, and the electrode lead-out parts of the plurality of battery cells are electrically connected through the bus part.
  • the bus component is electrically connected to the electrode lead-out member to facilitate electrical connection between multiple battery cells.
  • the bus component improves the production efficiency of the battery.
  • the battery cell further includes an electrode assembly, the electrode assembly is accommodated in the housing, the electrode assembly has a tab; the electrode lead-out member includes a first part and a second part, The first part is parallel to the first wall, the first part is electrically connected to the tab, the second part is connected to the bus component, and the connection surface between the second part and the bus component is located The plane intersects the first wall.
  • the plane where the connecting surface of the second part and the bus component is located intersects with the first wall, so as to facilitate the connection between the electrode lead-out component and the bus component.
  • the second positioning part is provided on the first part.
  • the second positioning part is provided on the first part to facilitate the assembly of the electrode lead-out part and the first insulating part.
  • the second part includes a first section, a second section and a third section
  • the first section extends from the first part in a direction away from the first wall
  • the The second section connects the first section and the third section at one end of the first section away from the first wall
  • the third section extends from the second section to the end close to the first wall.
  • the bus part is connected to a side of the third section away from the first section.
  • the second part is allowed to deform to absorb expansion stress.
  • the first insulating member includes a body and a protruding portion.
  • the body is disposed between the electrode lead-out member and the first wall.
  • the protruding portion extends along the first wall. The thickness direction of the wall protrudes from the body, the protruding part is inserted between the first section and the third section, and the first positioning part is provided on the body.
  • the protruding portion is inserted between the first section and the third section to support the third section to facilitate welding of the third section to the busbar.
  • the housing further has a second wall disposed opposite to the first wall, and an edge of the second wall is indented to form a recess, and the recess is used to accommodate the connection between the second wall and the first wall.
  • the electrode lead-out parts of the adjacent battery cells are used to accommodate the connection between the second wall and the first wall.
  • the recessed portion can accommodate the electrode lead-out parts of the battery cells adjacent to the second wall, making reasonable use of the assembly space, so that the battery has a higher energy density.
  • the present application provides an electrical device, including the battery cell provided in any of the above embodiments, where the battery cell is used to provide electrical energy.
  • 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 an exploded view of a battery cell provided by some embodiments of the present application.
  • Figure 4 is a top view of a battery cell provided by some embodiments of the present application.
  • Figure 5 is a cross-sectional view along the A-A direction of Figure 4.
  • Figure 6 is a partial enlarged view of C in Figure 5;
  • FIG. 7 is a schematic structural diagram of an electrode lead-out member provided by some embodiments of the present application.
  • Figure 8 is a schematic structural diagram of the first insulating member provided by some embodiments of the present application.
  • Figure 9 is a cross-sectional view along the B-B direction of Figure 4.
  • Figure 10 is a schematic diagram of the assembly of the electrode lead-out member and the first wall provided by some embodiments of the present application;
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • the term “plurality” refers to two or more (including two).
  • the orientation or positional relationship indicated by the technical terms “length”, “width”, “thickness”, “inner”, “outer”, “circumferential”, etc. are based on the orientation or positional relationship shown in the drawings, and only It is intended to facilitate the description of the embodiments of the present application and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode plate, a negative electrode plate 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 current collector without the positive electrode active material layer is used as a positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode 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.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector without the negative electrode active material layer is used as a negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that large currents can pass through without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the battery cell includes a casing, an electrode terminal, an electrode lead-out piece and a first insulating piece.
  • the casing includes a casing and a cover.
  • the electrode assembly is arranged in the casing.
  • the electrode terminal is inserted through the cover, and the tab of the electrode assembly is connected to the electrode terminal.
  • One end of the electrode lead-out piece is connected to the other end of the electrode terminal.
  • the electrode lead-out piece is used to lead out the electric energy of the battery cell;
  • the first insulating piece is disposed between the first wall and the electrode lead-out piece to insulate and isolate the first wall and the electrode lead-out piece.
  • Electrode lead-out The electrode lead-out piece is provided with a through hole for the power supply terminal to pass through, and the electrode lead-out piece is usually riveted to the electrode terminal.
  • the inventor designed a battery cell after in-depth research, in which a third insulating member is provided on the first insulating member.
  • a positioning part and a second positioning part are provided on the electrode lead-out part.
  • the first positioning part cooperates with the second positioning part to realize the positioning of the first insulating part to the electrode lead-out part, which facilitates positioning and assembly, and improves the efficiency of electrode lead-out.
  • the assembly of the component and the first insulating component is convenient, which improves the production efficiency of the battery cells.
  • the battery cells disclosed in the embodiments of the present application can be used in, but are not limited to, vehicles, ships, aircraft, and other electrical equipment.
  • the power supply system of the electrical equipment can be composed of battery cells, batteries, etc. disclosed in this application.
  • Embodiments of the present application provide an electrical device that uses a battery as a power source.
  • the electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, Spacecraft and more.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • an electrical device is a vehicle 1000 as an example.
  • 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 can be disposed at the bottom, head, or tail of the vehicle 1000.
  • the battery 100 can be used to power the vehicle 1000 .
  • the battery 100 can be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000 , such as for the starting, navigation and operating power requirements of 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 .
  • the battery 100 includes a case 101 and a battery cell 10.
  • the battery cell 10 is accommodated in the case 101.
  • the box 101 is used to provide an accommodation space for the battery cells 10, and the box 101 can adopt a variety of structures.
  • the box 101 may include a first sub-box 1011 and a second sub-box 1012.
  • the first sub-box 1011 and the second sub-box 1012 cover each other.
  • the first sub-box 1011 and the second sub-box 1012 are The two sub-boxes 1012 jointly define an accommodation space for accommodating the battery cells 10 .
  • the second sub-box 1012 may be a hollow structure with one end open, and the first sub-box 1011 may be a plate-like structure.
  • the first sub-box 1011 is covered with the open side of the second sub-box 1012, so that the first sub-box 1011
  • the box 1011 and the second sub-box 1012 jointly define an accommodation space; the first sub-box 1011 and the second sub-box 1012 can also be hollow structures with one side open, and the open side of the first sub-box 1011 Covered with the opening side of the second sub-box 1012.
  • the battery 100 there may be a plurality of battery cells 10 , and the plurality of battery cells 10 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 10 are connected in series and in parallel.
  • Multiple battery cells 10 can be directly connected in series or in parallel or mixed together, and then the whole composed of multiple battery cells 10 can be accommodated in the box 101 ; of course, the battery 100 can also be multiple battery cells 10
  • the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 101 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component 20 for realizing electrical connections between multiple battery cells 10 .
  • the battery cell 10 may be a secondary battery or a primary battery; the battery cell 10 may be a lithium-ion battery, a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 10 includes a casing 11 , an electrode assembly 12 , an electrode lead-out member 13 and an electrode terminal 15 .
  • the housing 11 includes a housing 111 and a cover 112.
  • the housing 111 has an opening, and the cover 112 closes the opening to isolate the internal environment of the battery cell 10 from the external environment.
  • the housing 111 is a component used to cooperate with the cover 112 to form an internal environment of the battery cell 10 , wherein the formed internal environment can be used to accommodate the electrode assembly 12 , electrolyte, and other components.
  • the housing 111 and the cover 112 may be independent components.
  • Housing 111 may be of various shapes and sizes. Specifically, the shape of the housing 111 can be determined according to the specific shape and size of the electrode assembly 12 .
  • the housing 111 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 embodiment of the present application. The embodiment of this application is introduced by taking the housing 111 as a rectangular parallelepiped as an example.
  • the cover 112 refers to a component that covers the opening of the case 111 to isolate the internal environment of the battery cell 10 from the external environment.
  • the shape of the cover 112 can be adapted to the shape of the housing 111 to fit the housing 111 .
  • the cover 112 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the cover 112 is less likely to deform when subjected to extrusion and impact, so that the battery cell 10 can have higher durability. Structural strength and safety performance can also be improved.
  • Functional components such as electrode terminals 15 may be provided on the cover 112 . The electrode terminal 15 may be used to electrically connect with the electrode assembly 12 for outputting or inputting electrical energy of the battery cell 10 .
  • the cover 112 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.
  • a second insulating member 17 may be provided inside the cover 112.
  • the second insulating member 17 may be used to isolate the electrical connection components in the housing 111 from the cover 112 to reduce the risk of short circuit.
  • the second insulating member 17 may be plastic, rubber, or the like.
  • the electrode assembly 12 is a component in the battery cell 10 where electrochemical reactions occur.
  • One or more electrode assemblies 12 may be contained within the housing 111 .
  • the electrode assembly 12 is mainly formed by winding or stacking a positive electrode piece and a negative electrode piece, and is usually provided with an isolation film between the positive electrode piece and the negative electrode piece. The isolation film is used to separate the positive electrode piece and the negative electrode piece. Avoid internal short circuit between positive and negative electrode pieces.
  • the portions of the positive electrode piece and the negative electrode piece that contain active material constitute the main body of the battery cell assembly, and the portions of the positive electrode piece and the negative electrode piece that do not contain active material each constitute the tab 121 .
  • 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. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs 121 are connected to the electrode terminals 15 to form a current loop.
  • the electrode lead-out member 13 is a component for extracting electric energy from the battery cell 10 .
  • the electrode lead-out member 13 is connected to the electrode terminal 15 , and the bus part 20 (see FIG. 2 ) is connected to the electrode lead-out member 13 .
  • a first insulating member 14 is provided between the electrode lead-out member 13 and the cover body 112 for insulating and isolating the electrode lead-out member 13 and the cover body 112 .
  • Figure 4 is a top view of a battery cell provided by some embodiments of the present application.
  • Figure 5 is a cross-sectional view along the A-A direction of Figure 4.
  • Figure 6 is a partial enlarged view of C in Figure 5.
  • the present application provides a battery cell 10 .
  • the battery cell 10 includes a casing 11 , an electrode lead-out member 13 and a first insulating member 14 .
  • the housing 11 includes a first wall 113 , and at least part of the electrode lead-out part 13 is disposed on a side of the first wall 113 away from the interior of the battery cell 10 .
  • the electrode lead-out part 13 is used to lead out the electric energy of the battery cell 10 .
  • At least part of the first insulating member 14 is disposed between the first wall 113 and the electrode lead-out member 13 to insulate and isolate the first wall 113 and the electrode lead-out member 13 .
  • the first insulating member 14 includes a first positioning portion 141
  • the electrode lead-out member 13 includes a second positioning portion 131 .
  • the first positioning portion 141 cooperates with the second positioning portion 131 to position the electrode lead-out member 13 .
  • the first wall 113 is a wall of the housing 11 , and the first wall 113 and other walls of the housing 11 define an accommodating space, and the electrode assembly 12 is disposed in the accommodating space.
  • At least part of the electrode lead-out part 13 is disposed on a side of the first wall 113 facing away from the interior of the battery cell 10 .
  • part of the electrode lead-out part 13 may be disposed on a side of the first wall 113 facing away from the interior of the battery cell 10 .
  • All electrode lead-out members 13 may be disposed on a side of the first wall 113 facing away from the interior of the battery cell 10 .
  • the side of the first wall 113 facing away from the inside of the battery cell 10 refers to the side of the first wall 113 away from the electrode assembly 12 .
  • At least a part of the first insulating member 14 is disposed between the first wall 113 and the electrode lead-out member 13 . It may be a part of the first insulating member 14 disposed between the first wall 113 and the electrode lead-out member 13 , or it may be all of the first insulating member 14 . An insulating member 14 is disposed between the first wall 113 and the electrode lead-out member 13 .
  • the first positioning part 141 is the positioning structure of the first insulating member 14
  • the second positioning part 131 is the positioning structure of the electrode lead-out member 13
  • the first positioning part 141 corresponds to the second positioning part 131
  • the first positioning part 141 is The second positioning parts 131 can cooperate with each other.
  • a first positioning part 141 is provided on the first insulating member 14 and a second positioning part 131 is provided on the electrode lead-out member 13.
  • a first positioning part 141 and the second positioning part 131 Cooperating with each other to realize the positioning of the first insulating member 14 to the electrode lead-out member 13 facilitates positioning and assembly, improves the convenience of assembly of the electrode lead-out member 13 and the first insulator 14 , and improves the production efficiency of the battery cell 10 .
  • one of the first positioning part 141 and the second positioning part 131 is a first protrusion, and the other one of the first positioning part 141 and the second positioning part 131 is a first groove.
  • the first positioning part 141 may be a first protrusion, and the second positioning part 131 may be a first groove; or, the first positioning part 141 may be a first groove, and the second positioning part 131 may be a first protrusion.
  • the first protrusion is provided correspondingly to the first groove, and the first protrusion can be inserted into the first groove to realize the assembly of the first insulating member 14 and the electrode lead-out member 13 .
  • the first protrusion cooperates with the first groove, and the structure is simple, which facilitates the assembly of the first insulating member 14 and the electrode lead-out member 13 .
  • the projection of the first protrusion on the first wall 113 is in a polygonal or elliptical shape.
  • the direction indicated by letter Z is the thickness direction of the first wall 113 .
  • the projection of the first protrusion on the first wall 113 is square.
  • the projection of the first protrusion on the first wall 113 is polygonal or elliptical, which can limit the rotation of the electrode lead-out member 13 relative to the first insulating member 14 and improve the electrode quality.
  • the number of first positioning parts 141 and the number of second positioning parts 131 are multiple, and the first positioning parts 141 and the second positioning parts 131 correspond one to one.
  • the first positioning portion 141 corresponds to the second positioning portion 131 one-to-one, and each first positioning portion 141 cooperates with one second positioning portion 131 .
  • the plurality of first positioning parts 141 and the plurality of second positioning parts 131 cooperate to enable the assembly of the electrode lead-out part 13 and the first insulating part 14 at multiple positions, and to limit the rotation of the electrode lead-out part 13 relative to the first insulating part 14 , so that the first insulating member 14 has a higher positioning effect on the electrode lead-out member 13 .
  • Figure 7 is a schematic structural diagram of an electrode lead-out member provided by some embodiments of the present application
  • Figure 8 is a schematic structural diagram of the first insulating member provided by some embodiments of the present application.
  • the first insulating member 14 includes a first surface 14a facing away from the first wall 113
  • the first positioning portion 141 is a first protrusion protruding from the first surface 14a
  • the second positioning portion 131 is First groove.
  • the first surface 14a is the surface of the first insulating member 14 facing away from the first wall 113 .
  • the first positioning portion 141 is a first protrusion protruding from the first surface 14a, that is, the first protrusion protrudes from the first surface 14a along the thickness direction Z of the first wall 113.
  • the second positioning portion 131 is a first groove provided on the electrode lead-out member 13 .
  • the first groove may be formed by a surface of the electrode lead-out member 13 close to the first insulating member 14 being recessed in a direction away from the first insulating member 14 .
  • the first groove may not penetrate the electrode lead-out member 13 along the thickness direction Z of the first wall 113 , or the first groove may also penetrate the electrode lead-out member 13 along the thickness direction Z of the first wall 113 , for example, the first groove It can be a through-hole-like structure.
  • the matching structure of the first groove and the first protrusion is simple in structure, easy to process, and easy to fit.
  • the cross-sectional area of the first protrusion gradually decreases from an end close to the first wall 113 to an end far away from the first wall 113 .
  • the cross-sectional area of the first protrusion refers to the area of the first protrusion cut by a plane perpendicular to the thickness direction Z of the first wall 113 .
  • the first protrusion has the smallest cross-sectional area at an end away from the first wall 113.
  • the first protrusion can be guided into the first groove. groove to facilitate the first protrusion to enter the first groove, thereby reducing the difficulty of inserting the first protrusion into the first groove.
  • the first groove extends to the edge of the electrode lead-out 13 .
  • the electrode lead-out member 13 includes a fifth surface 13a facing away from the first insulating member 14, a sixth surface 13b facing the first insulating member 14, and a side surface 13c.
  • the fifth surface 13a and the sixth surface 13b are along the thickness direction of the first wall 113.
  • Z is arranged oppositely, and the side surface 13c of the electrode lead-out member 13 connects the fifth surface 13a and the sixth surface 13b.
  • the first groove is formed by the sixth surface 13b being recessed toward the fifth surface 13a.
  • the first groove extending to the edge of the electrode lead-out member 13 means that the first groove extends to the side surface 13 c of the electrode lead-out member 13 .
  • the first groove extends to the edge of the electrode lead-out member 13, which facilitates processing of the first groove from the edge of the electrode lead-out member 13 and reduces the difficulty of processing.
  • the first groove penetrates the electrode lead-out member 13 along the thickness direction of the electrode lead-out member 13 .
  • the thickness direction of the electrode lead out 13 may be parallel to the thickness direction Z of the first wall 113 .
  • the first groove penetrates the electrode lead-out member 13 along the thickness direction of the electrode lead-out member 13 , that is, the first groove extends from the sixth surface 13 b to the fifth surface 13 a along the thickness direction of the electrode lead-out member 13 .
  • the first groove penetrates the electrode lead-out member 13 , which facilitates processing and can reduce the weight of the electrode lead-out member 13 .
  • the first groove may not penetrate the electrode lead-out member 13 along the thickness direction of the electrode lead-out member 13 .
  • the height of the first protrusion protruding from the first surface 14a is H1, which satisfies 0.5mm ⁇ H1 ⁇ 1.5mm.
  • the height H1 of the first protrusion protruding from the first surface 14a refers to the distance between the surface of the first protrusion away from the first surface 14a and the first surface 14a along the thickness direction Z of the first wall 113 .
  • the height H1 of the first protrusion from the first surface 14a may be 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm, etc.
  • the height H1 of the first protrusion protruding from the first surface 14a satisfies the above range, so that the first protrusion and the first groove have a better positioning effect. If the height H1 of the first protrusion protruding from the first surface 14a is less than 0.5 mm, the positioning effect between the first groove and the first protrusion is poor; if the height H1 of the first protrusion protruding from the first surface 14a If the thickness is greater than 1.5 mm, the first protrusion occupies a larger assembly space in the thickness direction Z of the first wall 113 .
  • the battery cell 10 further includes two electrode terminals 15 , and the two electrode terminals 15 are provided on the first wall 113 ; the electrode lead-out member 13 is provided with two second electrode terminals 15 .
  • a through hole 132 , two first through holes 132 are respectively used to install two electrode terminals 15 , and the second positioning portion 131 is located between the two first through holes 132 .
  • the two electrode terminals 15 mentioned here may be two positive electrode terminals, or may be two negative electrode terminals.
  • the battery cell includes two positive electrode terminals and two negative electrode terminals.
  • the two positive electrode terminals are matched with one electrode lead-out piece and a first insulating piece, and the two negative electrode terminals are matched with another electrode lead-out piece. Cooperate with another first insulating piece.
  • the two first through holes 132 correspond to the two electrode terminals 15 one-to-one, and each electrode terminal 15 is installed in one first through hole 132 .
  • the two first through holes 132 are spaced apart along the second direction Y, and the second direction Y may be the width direction of the battery cell 10 .
  • the electrode terminal 15 may be in a cylindrical shape to facilitate processing and manufacturing.
  • the first through hole 132 may be a circular hole.
  • the second positioning part 131 is located between the two first through holes 132.
  • the second positioning part 131 cooperates with the first positioning part 141 to realize the positioning of the first insulating member 14 to the electrode lead 13, which can reduce the size of the first through hole. 132 machining accuracy.
  • the first wall 113 includes a third positioning portion 1131
  • the first insulating member 14 includes a fourth positioning portion 142
  • the third positioning portion 1131 is connected to the third positioning portion 142 .
  • the four positioning parts 142 cooperate to position the first insulating member 14 .
  • the third positioning part 1131 is a positioning structure on the first wall 113.
  • the fourth positioning part 142 is a positioning structure on the first insulating member 14.
  • the fourth positioning part 142 is provided correspondingly to the third positioning part 1131.
  • the fourth positioning part 142 It can cooperate with the third positioning part 1131.
  • the cooperation between the third positioning part 1131 and the fourth positioning part 142 facilitates the positioning of the first wall 113 on the first insulating member 14 and improves assembly efficiency.
  • the area enclosed by the projection of the fourth positioning portion 142 on the first wall 113 is different from the first positioning portion 141
  • the projections on the first wall 113 at least partially overlap.
  • the area surrounded by the projection of the fourth positioning portion 142 on the first wall 113 is also the area surrounded by the projection outline of the fourth positioning portion 142 on the first wall 113 .
  • the area enclosed by the projection of the fourth positioning part 142 on the first wall 113 at least partially overlaps with the projection of the first positioning part 141 on the first wall 113 , which may be the projection of the fourth positioning part 142 on the first wall 113
  • the area enclosed partially overlaps with the projection of the first positioning portion 141 on the first wall 113 , or the area enclosed by the projection of the fourth positioning portion 142 on the first wall 113 overlaps with the projection of the first positioning portion 141 on the first wall 113 .
  • the projections on wall 113 all overlap.
  • the area enclosed by the fourth positioning portion 142 on the first wall 113 at least partially overlaps with the projection of the first positioning portion 141 on the first wall 113 , so that the structure of the first insulating member 14 is compact.
  • the projection of the fourth positioning portion 142 on the first wall 113 falls into the first positioning portion 141 on the first wall 113 . within the projection on wall 113.
  • the projection of the fourth positioning portion 142 on the first wall 113 falls within the projection of the first positioning portion 141 on the first wall 113 , that is, along the thickness direction Z of the first wall 113 , the fourth positioning portion 142 is in contact with the first wall 113 .
  • the positioning portions 141 overlap, making the structure of the first insulating member 14 more compact.
  • the first insulating member 14 includes a first surface 14 a facing away from the first wall 113 and a second surface 14 b facing the first wall 113 , and the first positioning portion 141 Disposed on the first surface 14a, the fourth positioning portion 142 is provided on the second surface 14b.
  • the first surface 14 a and the second surface 14 b are two surfaces opposite to each other in the thickness direction of the first insulating member 14 .
  • the thickness direction of the first insulating member 14 may be parallel to the thickness direction Z of the first wall 113 .
  • the first positioning part 141 is a positioning structure provided on the first surface 14a
  • the fourth positioning part 142 is a positioning structure provided on the second surface 14b.
  • the first positioning portion 141 and the fourth positioning portion 142 are respectively located on two opposite surfaces of the first insulating member 14 so that the first insulating member 14 can be positioned on opposite sides of the thickness direction Z of the first wall 113 Assembly with the electrode lead-out piece 13 and the first wall 113 respectively.
  • the first wall 113 includes a third surface 113 a facing away from the interior of the battery cell 10 , and the third positioning portion 1131 is a second surface protruding from the third surface 113 a.
  • the fourth positioning portion 142 is a protrusion and is a second groove.
  • the shape of the second groove can be in various forms, which is not limited in this application.
  • the second groove may be a long circular groove, that is, both ends of the second groove in the length direction are semicircular structures, and the middle section of the second groove is linear.
  • the first wall 113 also includes a fourth surface (not shown in the figure) facing the inside of the battery cell 10 .
  • the third surface 113 a and the fourth surface are two opposite surfaces in the thickness direction Z of the first wall 113 .
  • the third positioning portion 1131 protrudes from the third surface 113a, and the fourth positioning portion 142 is a second groove recessed in the second surface 14b.
  • the third positioning part 1131 is a second protrusion
  • the fourth positioning part 142 is a second groove.
  • the matching structure of the second protrusion and the second groove has a simple structure and is easy to process.
  • the second groove penetrates the first insulating member 14 along the thickness direction of the first insulating member 14 .
  • the thickness direction of the first insulating member 14 may be parallel to the thickness direction Z of the first wall 113 .
  • the second groove penetrates the first insulating member 14 along the thickness direction of the first insulating member 14 , that is, the second groove extends from the second surface 14 b to the first surface 14 a along the thickness direction of the first insulating member 14 , that is, the second groove extends along the thickness direction of the first insulating member 14 .
  • the slot is a through hole.
  • the fourth positioning part 142 is a through hole
  • the third positioning part 1131 is a second protrusion.
  • the second protrusion cooperates with the through hole provided in the first insulating member 14 to realize the positioning of the first wall 113 to the first insulating member 14 .
  • the second groove penetrates the first insulating member 14, which facilitates processing and can reduce the weight of the first insulating member 14.
  • the height of the second protrusion protruding from the third surface 113a is H2, which satisfies 0.3mm ⁇ H2 ⁇ 1.5mm.
  • the height H2 of the second protrusion protruding from the third surface 113a refers to the distance between the surface of the second protrusion away from the third surface 113a and the third surface 113a along the thickness direction Z of the first wall 113.
  • the height H2 of the second protrusion protruding from the third surface 113a may be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm , 1.4mm, 1.5mm, etc.
  • the height H2 of the second protrusion protruding from the third surface 113a satisfies the above range, so that the second protrusion and the second groove have a better matching effect. If the height H2 of the second protrusion protruding from the third surface 113a is less than 0.3mm, the positioning effect between the second groove and the second protrusion is poor; if the height H2 of the second protrusion protruding from the third surface 113a If it is greater than 1.5 mm, the second protrusion occupies a larger assembly space in the thickness direction Z of the first wall 113 .
  • the battery cell 10 further includes two electrode terminals 15, and the two electrode terminals 15 are provided on the first wall 113; the first insulating member 14 is provided with two The second through holes 143 are respectively used to install the two electrode terminals 15 .
  • the fourth positioning portion 142 is located between the two second through holes 143 .
  • the two second through holes 143 are spaced apart along the second direction Y.
  • the second through hole 143 may be a circular hole.
  • the two second through holes 143 correspond to the two electrode terminals 15 one-to-one, and each electrode terminal 15 is installed in one second through hole 143 .
  • the fourth positioning part 142 is located between the two second through holes 143.
  • the fourth positioning part 142 cooperates with the third positioning part 1131 to realize the positioning of the first wall 113 to the first insulating member 14, and the second through hole can be lowered. 143mm processing accuracy.
  • the first wall 113 is provided with two electrode mounting holes 1132.
  • the two electrode mounting holes 1132 are respectively used to install two electrode terminals 15.
  • the aperture of the electrode mounting holes 1132 is D1
  • the hole diameter of the second through hole 143 is D2, and satisfies D1 ⁇ D2.
  • the two electrode mounting holes mentioned here refer to the holes used to install two positive electrode terminals, or the holes used to install two negative electrode terminals.
  • the first wall 113 is provided with two other electrode mounting holes 1132 for mounting on the two electrode terminals 15 with opposite polarities of the two electrode terminals 15 .
  • the two electrode mounting holes 1132 correspond to the two electrode terminals 15 one-to-one, and each electrode terminal 15 is installed in one electrode mounting hole 1132 . As shown in FIG. 3 , two electrode mounting holes 1132 are spaced apart along the second direction Y. Alternatively, the electrode mounting hole 1132 may be a round hole.
  • the diameter D1 of the electrode mounting hole 1132 and the diameter D2 of the second through hole 143 satisfy the above relationship, so that the processing accuracy of the second through hole 143 is low.
  • the second through hole 143 can be realized.
  • a wall 113 positions the first insulating element 14 .
  • 0.5mm ⁇ D2-D1 ⁇ 1mm is satisfied.
  • the difference D2-D1 between the diameter D2 of the second through hole 143 and the diameter D1 of the electrode mounting hole 1132 may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc.
  • the difference between the diameter D2 of the second through hole 143 and the diameter D1 of the electrode mounting hole 1132 satisfies the above relationship. There is a certain assembly gap between the electrode terminal 15 and the second through hole 143 to facilitate the installation of the second through hole 143 and the electrode terminal 15 assembly. If the difference between the diameter D2 of the second through hole 143 and the diameter D1 of the electrode mounting hole 1132 is too small, the assembly difficulty of the electrode terminal 15 with the second through hole 143 and the electrode mounting hole 1132 increases, which is not conducive to the second through hole.
  • Figure 9 is a cross-sectional view along the B-B direction of Figure 4.
  • the battery unit 10 further includes a sealing member 18 , the sealing member 18 is sleeved on the electrode terminal 15 , and the sealing member 18 is disposed between the electrode terminal 15 and the electrode mounting hole 1132 .
  • the seal 18 is made of insulating material.
  • the sealing member 18 may be a sealing ring to facilitate assembly with the electrode terminal 15 .
  • the outer diameter of the partial seal 18 is smaller than the diameter of the electrode mounting hole 1132 , so that the partial seal 18 can be inserted into the electrode mounting hole 1132 following the electrode terminal 15 .
  • the housing 11 includes a housing 111 and a cover 112 .
  • the housing 111 has an opening
  • the cover 112 closes the opening
  • the first wall 113 is the cover 112 .
  • the first wall 113 is a cover 112 to facilitate the assembly of the first insulating member 14 and the first wall 113 .
  • the first wall 113 is the wall with the largest area among all the walls of the battery cell 10 .
  • the battery cell 10 may be in the shape of a rectangular parallelepiped, and the first wall 113 is the wall with the largest area among all the walls of the battery cell 10 . In other words, the large surface of the battery cell 10 is set as the first wall 113 .
  • the thickness direction Z of the first wall 113 may be the thickness direction of the battery cell 10 .
  • the present application also provides a battery 100.
  • the battery 100 includes a box 101, a bus component 20 and a plurality of battery cells 10.
  • the busbar 20 is accommodated in the box 101 .
  • a plurality of battery cells 10 are stacked along the thickness direction Z of the first wall 113 , and the electrode leads 13 of the plurality of battery cells 10 are electrically connected through the bus part 20 .
  • the bus part 20 can connect the electrode lead-out parts 13 of two adjacent battery cells 10 , or the bus part 20 can also connect the electrode lead-out parts 13 of two battery cells 10 that are spaced apart. For example, one end of the bus part 20 is connected to The other end of the bus component 20 is connected to the electrode lead-out member 13 of one battery cell 10 and is connected to the electrode lead-out member 13 of one or more battery cells 10 separated from the battery cell 10 .
  • the bus component 20 is electrically connected to the electrode lead-out member 13 to facilitate the electrical connection between multiple battery cells 10; using the above-mentioned battery cells 10 improves the production efficiency of the battery 100 .
  • Figure 10 is a schematic diagram of the assembly of the electrode lead-out member and the first wall provided by some embodiments of the present application.
  • the battery cell 10 further includes an electrode assembly 12.
  • the electrode assembly 12 is accommodated in the housing 11.
  • the electrode assembly 12 has tabs 121;
  • the electrode lead-out member 13 includes a third One part 133 and the second part 134, the first part 133 is parallel to the first wall 113, the first part 133 is electrically connected to the tab 121, the second part 134 is connected to the bus component 20, and the connection surface between the second part 134 and the bus component 20 is located The plane intersects the first wall 113 .
  • the first part 133 and the second part 134 are two parts of the electrode lead-out member 13 .
  • the first part 133 is electrically connected to the tab 121, and the second part 134 is connected to the bus component 20, so that the electrode lead-out part 13 is connected to the tab 121 and the bus component 20 on different surfaces.
  • the first part 133 is parallel to the first wall 113 , that is, the thickness direction of the first part 133 is parallel to the thickness direction Z of the first wall 113 .
  • the first portion 133 is parallel to the flatter portion of the first wall 113 with a larger area.
  • the fact that the first part 231 is parallel to the first wall 213 means that the first part 231 is opposite to the first wall 213 , or that the largest surface of the first part 231 is opposite to the first wall 213 . It does not mean that the first part 231 is arranged along the first wall 213 . Both surfaces of the first wall 213 in the thickness direction Z must be parallel to the first wall 213 .
  • the plane where the connecting surface 13d of the second part 134 and the bus part 20 is located intersects with the first wall 113.
  • the angle ⁇ between the plane where the connecting surface 13d of the second part 134 and the bus part 20 is located and the first wall 113 is 60 degrees-120 degrees.
  • the angle ⁇ between the plane where the connecting surface 13d of the second part 134 and the bus part 20 is located and the first wall 113 is 85 degrees to 95 degrees.
  • the connection surface 13d of the second part 134 and the bus part 20 may be perpendicular to the first wall 113.
  • the battery cell 10 also includes an adapter 16.
  • the first part 133 is electrically connected to the tab 121.
  • the first part 133 can be electrically connected to the tab 121 through the electrode terminal 15 and the adapter 16.
  • the tab 121 is connected to the adapter 16
  • the adapter 16 is connected to the electrode terminal 15
  • the electrode terminal 15 is connected to the first part 133 , thereby realizing the electrical connection between the tab 121 and the first part 133 .
  • the battery 100 unit also includes a second insulating member 17 , which is disposed between the first wall and the adapter 16 for insulating and isolating the first wall and the adapter 16 .
  • the plane where the connecting surface of the second part 134 and the bus component 20 is located intersects the first wall 113 to facilitate the connection between the electrode lead-out member 13 and the bus component 20 .
  • connection surface 13d is the surface of the electrode lead-out member 13 closest to the edge of the first wall 113 in the first direction X.
  • the second positioning portion 131 is provided on the first portion 133 .
  • the second positioning portion 131 is provided in the first portion 133 to facilitate the assembly of the electrode lead-out member 13 and the first insulating member 14 and to facilitate the electrical connection between the first portion 133 and the tab 121 .
  • the second part 134 includes a first section 1341 , a second section 1342 and a third section 1343 .
  • the first section 1341 moves away from the first section 133 towards the first section.
  • the second section 1342 extends in the direction of the wall 113.
  • the second section 1342 connects the first section 1341 and the third section 1343 at the end of the first section 1341 away from the first wall 113.
  • the third section 1343 extends from the second section 1342 to the end close to the first wall 113. Extending in the direction, the bus part 20 is connected to the side of the third section 1343 away from the first section 1341 .
  • the first section 1341 is connected to the first section 133
  • the second section 1342 is connected to the third section 1343 and the first section 1341.
  • the third section 1343 is used to connect with the third section 1343.
  • the structure is simple, and the second section 134 can be bent and formed.
  • the electrode lead-out member 13 may have a bent structure so that the second part 134 can deform to absorb expansion stress.
  • the battery cell 10 may cause the casing 11 to expand due to an increase in internal pressure or temperature, and the electrode lead-out member 13 may deform to absorb the expansion stress.
  • the second portion 134 may be U-shaped to facilitate manufacturing.
  • the first insulating member 14 includes a body 144 and a protruding portion 145 .
  • the body 144 is disposed between the electrode lead-out member 13 and the first wall 113 .
  • the protruding portion 145 145 protrudes from the body 144 along the thickness direction Z of the first wall 113 , the protruding portion 145 is inserted between the first section 1341 and the third section 1343 , and the first positioning portion 141 is provided on the body 144 .
  • the protruding portion 145 may protrude from the body 144 along the thickness direction Z of the first wall 113 toward a side away from the interior of the battery cell 10 .
  • the protruding portion 145 is inserted between the first section 1341 and the third section 1343 to support the third section 1343 to facilitate welding of the third section 1343 to the bus component 20 .
  • the housing 11 also has a second wall 114 opposite to the first wall 113 .
  • the edge of the second wall 114 is indented to form a recess 1141 , and the recess 1141 is used to accommodate the second wall 114 .
  • the two walls 114 are adjacent to the electrode leads 13 of the battery cells 10 .
  • the second wall 114 and the first wall 113 are two walls of the housing 11 that are oppositely arranged along the thickness direction Z of the first wall 113 .
  • the edge of the second wall 114 is recessed toward the first wall 113 along the thickness direction Z of the first wall 113 to form a recess 1141 .
  • the depth of the recess 1141 is greater than the height of the electrode lead-out member 13 protruding from the first wall 113 .
  • the surface of the second wall 114 may be provided with an insulating layer, so that when multiple battery cells 10 are stacked, the second wall 114 is insulated from the electrode leads 13 of adjacent battery cells 10 .
  • the recess 1141 is arranged to accommodate the electrode lead-out member 13 of the battery cell 10 adjacent to the second wall 114, making reasonable use of the assembly space, so that the battery 100 has a higher energy density.
  • the present application also provides an electrical device.
  • the electrical device includes the battery cell 10 provided in any of the above embodiments.
  • the battery cell 10 is used to provide electric energy.
  • the electrical equipment may be any of the aforementioned devices or systems using the battery cells 10 .
  • the present application provides a battery cell 10 , which is in the shape of a flat rectangular parallelepiped.
  • the battery cell 10 includes a casing 11 , an electrode assembly 12 , an electrode lead-out member 13 , a first insulating member 14 , an electrode terminal 15 , an adapter 16 , a second insulating member 17 , and a sealing member 18 .
  • the housing 11 includes a housing 111 and a cover 112.
  • the housing 111 has an opening, the cover 112 closes the opening, and the cover 112 is the first wall 113.
  • the electrode assembly 12 is disposed in the housing 111 , and has tabs 121 .
  • the electrode lead-out piece 13 is located on the side of the first wall 113 away from the interior of the battery cell 10.
  • the electrode lead-out piece 13 includes a first part 133 and a second part 134.
  • the first part 133 is provided with a second positioning part 131, the second part 134 and the second part 134. Parts 133 are arranged in sequence along the first direction
  • the first insulating member 14 is disposed between the first wall 113 and the electrode lead-out member 13 to insulate and isolate the first wall 113 and the electrode lead-out member 13 .
  • the electrode lead-out member 13 includes a fifth surface 13a facing away from the first insulating member 14 and a sixth surface 13b facing the first insulating member 14.
  • the second positioning portion 131 is a first groove provided on the sixth surface 13b. The groove is formed by the sixth surface 13 b being recessed in a direction away from the first insulating member 14 , and the first groove penetrates the electrode lead-out member 13 along the thickness direction Z of the first wall 113 .
  • the first insulation member 14 includes a first surface 14a facing away from the first wall 113 and a second surface 14b facing the first wall 113.
  • the first insulation member 14 includes a first positioning portion 141 and a fourth positioning portion 142.
  • the first positioning portion 141 is a first protrusion protruding from the first surface 14a
  • the fourth positioning portion 142 is a second groove provided on the second surface 14b. The first protrusion is inserted into the first groove to position the electrode lead-out member 13 .
  • the first wall 113 includes a third surface 113a facing away from the interior of the battery cell 10 and a fourth surface facing the interior of the battery cell 10.
  • the first wall 113 includes a third positioning portion 1131, and the third positioning portion 1131 is protruding from the third surface.
  • the second protrusion on the surface 113a is inserted into the second groove to position the first insulating member 14 .
  • the battery cell 10 provided in the embodiment of the present application cooperates with the first positioning part 141 and the second positioning part 131 to facilitate the positioning of the first insulating part 14 to the electrode lead-out part 13; through the third positioning part 1131 and the fourth The positioning portion 142 cooperates to facilitate the positioning of the first wall 113 to the first insulating member 14 , which facilitates positioning and assembly, and improves the production efficiency of the battery cell 10 .

Landscapes

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

Abstract

本申请实施例提供一种电池单体、电池及用电设备。电池单体包括：外壳，包括第一壁；电极引出件，至少部分设置于所述第一壁的背离所述电池单体内部的一侧，用于将所述电池单体的电能引出；第一绝缘件，至少部分设置于所述第一壁与所述电极引出件之间，以绝缘隔离所述第一壁与所述电极引出件；其中，所述第一绝缘件包括第一定位部，所述电极引出件包括第二定位部，所述第一定位部与所述第二定位部相配合以对所述电极引出件进行定位。该电池单体，具有较高的生产效率。

Description

电池单体、电池及用电设备 技术领域
本申请涉及电池技术领域，特别是涉及一种电池单体、电池及用电设备。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电池的制造过程中，电池的生产效率是一个不可忽视的问题。因此，如何提高电池的生产效率，是电池技术中一个亟需解决的技术问题。
发明内容
本申请的目的在于提供一种电池单体、电池及用电设备。该电池单体，具有较高的生产效率。
本申请是通过下述技术方案实现的：
第一方面，本申请提供了一种电池单体，包括：外壳，包括第一壁；电极引出件，至少部分设置于所述第一壁的背离所述电池单体内部的一侧，用于将所述电池单体的电能引出；第一绝缘件，至少部分设置于所述第一壁与所述电极引出件之间，以绝缘隔离所述第一壁与所述电极引出件；其中，所述第一绝缘件包括第一定位部，所述电极引出件包括第二定位部，所述第一定位部与所述第二定位部相配合以对所述电极引出件进行定位。
根据本申请实施例的电池单体，第一绝缘件包括第一定位部，电极引出件包括第二定位部，通过第一定位部与第二定位部相配合来实现对电极引出件的定位，方便定位、方便装配，提高了电极引出件与第一绝缘件的装配便捷性，提高了电池单体的生产效率。
根据本申请的一些实施例，所述第一定位部与所述第二定位部中的一者为第一凸起，所述第一定位部与所述第二定位部中的另一者为第一凹槽。
在上述方案中，第一凸起与第一凹槽配合，结构简单，便于实现第一绝缘件与电极引出件的装配。
根据本申请的一些实施例，沿所述第一壁的厚度方向，所述第一凸起在所述第一壁上的投影呈多边形或椭圆形。
在上述方案中，第一凸起在第一壁上的投影呈多边形或椭圆形，能够限制电极引出件相对于第一绝缘件转动，提高电极引出件与第一绝缘件的定位精度。
根据本申请的一些实施例，所述第一定位部的数量和所述第二定位部的数量均为多个，所述第一定位部与所述第二定位部一一对应。
在上述方案中，多个第一定位部和多个第二定位部配合，能够在多个位置实现电极引出件与第一绝缘件的装配，能够限制电极引出件相对于第一绝缘件转动，使得第一绝缘件对电极引出件 具有较高的定位效果。
根据本申请的一些实施例，所述第一绝缘件包括背离所述第一壁的第一表面，所述第一定位部为凸出于所述第一表面的第一凸起，所述第二定位部为第一凹槽。
在上述方案中，第一凹槽与第一凸起的配合结构，结构简单，便于加工，便于配合。
根据本申请的一些实施例，沿所述第一壁的厚度方向，所述第一凸起的截面积由靠近所述第一壁的一端向远离所述第一壁的一端逐渐减小。
在上述方案中，沿第一壁的厚度方向，第一凸起的截面积朝向远离第一壁的一端逐渐减小，能够引导第一凸起进入第一凹槽，以降低第一凸起插入第一凹槽的难度。
根据本申请的一些实施例，所述第一凹槽延伸至所述电极引出件的边缘。
在上述方案中，第一凹槽延伸至电极引出件的边缘，便于从电极引出件的边缘加工第一凹槽，降低加工难度。
根据本申请的一些实施例，所述第一凹槽沿所述电极引出件的厚度方向贯穿所述电极引出件。
在上述方案中，第一凹槽贯穿电极引出件，便于加工，能够降低电极引出件的重量。
根据本申请的一些实施例，所述第一凸起凸出所述第一表面的高度为H1，满足0.5mm≤H1≤1.5mm。
在上述方案中，第一凸起凸出第一表面的高度H1满足上述范围，使得第一凸起与第一凹槽具有较好的定位效果。如果第一凸起凸出第一表面的高度H1小于0.5mm，则第一凹槽与第一凸起之间的定位效果较差；如果第一凸起凸出第一表面的高度H1大于1.5mm，则第一凸起在第一壁的厚度方向上占用较大的装配空间。
根据本申请的一些实施例，所述电池单体还包括：两个电极端子，设置于所述第一壁；所述电极引出件设置有两个第一通孔，两个所述第一通孔分别用于安装两个所述电极端子，所述第二定位部位于两个所述第一通孔之间。
在上述方案中，第二定位部位于两个第一通孔之间，通过第二定位部与第一定位部配合来实现第一绝缘件对电极引出件的定位，能够降低第一通孔的加工精度。
根据本申请的一些实施例，所述第一壁包括第三定位部，所述第一绝缘件包括第四定位部，所述第三定位部与所述第四定位部相配合以对所述第一绝缘件进行定位。
在上述方案中，通过第三定位部与第四定位部配合，便于实现第一壁对第一绝缘件的定位，提高装配效率。
根据本申请的一些实施例，沿所述第一壁的厚度方向，所述第四定位部在所述第一壁上的投影围成的区域与所述第一定位部在所述第一壁上的投影至少部分重叠。
在上述方案中，第四定位部在第一壁上围成的区域与第一定位部在第一壁上的投影至少部分重叠，使得第一绝缘件的结构紧凑。
根据本申请的一些实施例，沿所述第一壁的厚度方向，所述第四定位部在所述第一壁上的投影落入所述第一定位部在所述第一壁上的投影内。
在上述方案中，第四定位部在第一壁上的投影落入第一定位部在第一壁上的投影内，使得第一绝缘件的结构较为紧凑。
根据本申请的一些实施例，所述第一绝缘件包括背离所述第一壁的第一表面和面向所述第 一壁的第二表面，所述第一定位部设置于所述第一表面，所述第四定位部设置于所述第二表面。
在上述方案中，第一定位部和第四定位部分别位于第一绝缘件的相对的两个表面，以便于第一绝缘件在第一壁的厚度方向上与电极引出件和第一壁的装配。
根据本申请的一些实施例，所述第一壁包括背离所述电池单体内部的第三表面，所述第三定位部为凸出于所述第三表面的第二凸起，所述第四定位部为第二凹槽。
在上述方案中，第三定位部为第二凸起，第四定位部为第二凹槽，第二凸起与第二凹槽的配合结构，结构简单，便于加工。
根据本申请的一些实施例，所述第二凹槽沿所述第一绝缘件的厚度方向贯穿所述第一绝缘件。
在上述方案中，第二凹槽贯穿第一绝缘件，便于加工，能够降低第一绝缘件的重量。
根据本申请的一些实施例，所述第二凸起凸出所述第三表面的高度为H2，满足0.3mm≤H2≤1.5mm。
在上述方案中，第二凸起凸出第三表面的高度H2满足上述范围，使得第二凸起与第二凹槽具有较好的配合效果。如果第二凸起凸出第三表面的高度H2过小，第二凹槽与第二凸起之间的定位效果较差；如果第二凸起凸出第三表面的高度H2过大，则第二凸起在第一壁的厚度方向上占用较大的装配空间。
根据本申请的一些实施例，所述电池单体还包括：两个电极端子，设置于所述第一壁；所述第一绝缘件设置有两个第二通孔，两个所述第二通孔分别用于安装两个所述电极端子，所述第四定位部位于两个所述第二通孔之间。
在上述方案中，第四定位部位于两个第二通孔之间，通过第四定位部与第三定位部配合来实现第一壁对第一绝缘件的定位，能够降低第二通孔的加工精度。
根据本申请的一些实施例，所述第一壁设置有两个电极安装孔，两个所述电极安装孔分别用于安装两个所述电极端子，所述电极安装孔的孔径为D1，所述第二通孔的孔径为D2，满足D1<D2。
在上述方案中，电极安装孔的孔径D1与第二通孔的孔径D2满足上述关系，使得第二通孔的加工精度较低，通过第四定位部与第三定位部配合，即可实现第一壁对第一绝缘件的定位。
根据本申请的一些实施例，满足0.5mm≤D2-D1≤1mm。
在上述方案中，第二通孔的孔径D2与电极安装孔的孔径D1的差值满足上述关系，电极端子与第二通孔具有一定的装配间隙，便于实现第二通孔与电极端子的装配。如果第二通孔的孔径D2与电极安装孔的孔径D1的差值过小，则不利于第二通孔与电极端子的装配；如果第二通孔的孔径D2与电极安装孔的孔径D1的差值过大，则电极端子的外周面与第二通孔的孔壁之间具有较大的间隙，第一绝缘件与电极端子的装配效果较差。
根据本申请的一些实施例，所述外壳包括壳体和盖体，所述壳体具有开口，所述盖体封闭所述开口，所述第一壁为所述盖体。
在上述方案中，第一壁为盖体，便于实现第一绝缘件与第一壁的装配。
根据本申请的一些实施例，所述第一壁为所述电池单体的所有壁中面积最大的壁。
第二方面，本申请提供了一种电池，包括：箱体；汇流部件，容纳于所述箱体内；多个上述任一实施例提供的电池单体，容纳于所述箱体内，多个所述电池单体沿所述第一壁的厚度方向堆 叠设置，多个所述电池单体的所述电极引出件通过所述汇流部件电连接。
根据本申请实施例的电池，汇流部件与电极引出件电连接，以便于实现多个电池单体之间的电连接，采用上述的电池单体，提高了电池的生产效率。
根据本申请的一些实施例，所述电池单体还包括电极组件，所述电极组件容纳于所述外壳内，所述电极组件具有极耳；所述电极引出件包括第一部分和第二部分，所述第一部分与所述第一壁平行，所述第一部分与所述极耳电连接，所述第二部分与所述汇流部件连接，所述第二部分与所述汇流部件的连接面所在的平面与所述第一壁相交。
在上述方案中，第二部分与汇流部件的连接面所在的平面与第一壁相交，以便于实现电极引出件与汇流部件的连接。
根据本申请的一些实施例，所述第二定位部设置于所述第一部分。
在上述方案中，第二定位部设置于第一部分，便于实现电极引出件与第一绝缘件的装配。
根据本申请的一些实施例，所述第二部分包括第一段、第二段和第三段，所述第一段从所述第一部分朝着背离所述第一壁的方向延伸，所述第二段在所述第一段的远离所述第一壁的一端连接所述第一段和所述第三段，所述第三段从所述第二段向靠近所述第一壁的方向延伸，所述汇流部件连接于所述第三段的背离所述第一段的一侧。
在上述方案中，使得第二部分能够发生变形以吸收膨胀应力。
根据本申请的一些实施例，所述第一绝缘件包括本体和凸出部，所述本体设置于所述电极引出件与所述第一壁之间，所述凸出部沿所述第一壁的厚度方向凸出于所述本体，所述凸出部插设于所述第一段和所述第三段之间，所述第一定位部设置于所述本体。
在上述方案中，凸出部插设于第一段和第三段之间，对第三段起到支撑作用，以便于第三段与汇流部件焊接。
根据本申请的一些实施例，所述外壳还具有与所述第一壁相对设置的第二壁，所述第二壁的边缘内陷形成凹部，所述凹部用于容纳与所述第二壁相邻的所述电池单体的所述电极引出件。
在上述方案中，在多个电池单体堆叠时，凹部的设置，能够容纳与第二壁相邻电池单体的电极引出件，合理利用装配空间，使得电池具有较高的能量密度。
第三方面，本申请提供了一种用电设备，包括上述任一实施例提供的电池单体，所述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图；
图3为本申请一些实施例提供的电池单体的爆炸图；
图4为本申请一些实施例提供的电池单体的俯视图；
图5为图4的A-A方向的剖视图；
图6为图5的C处局部放大图；
图7为本申请一些实施例提供的电极引出件的结构示意图；
图8为本申请一些实施例提供的第一绝缘件的结构示意图；
图9为图4的B-B方向的剖视图；
图10为本申请一些实施例提供的电极引出件与第一壁的装配示意图；
在附图中，附图并未按照实际的比例绘制。
标记说明：100-电池；101-箱体；1011-第一子箱体；1012-第二子箱体；10-电池单体；11-外壳；111-壳体；112-盖体；113-第一壁；113a-第三表面；1131-第三定位部；1132-电极安装孔；114-第二壁；1141-凹部；12-电极组件；121-极耳；13-电极引出件；13a-第五表面；13b-第六表面；13c-侧面；13d-连接面；131-第二定位部；132-第一通孔；133-第一部分；134-第二部分；1341-第一段；1342-第二段；1343-第三段；14-第一绝缘件；14a-第一表面；14b-第二表面；141-第一定位部；142-第四定位部；143-第二通孔；144-本体；145-凸出部；15-电极端子；16-转接件；17-第二绝缘件；18-密封件；20-汇流部件；200-控制器；300-马达；1000-车辆。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
除非另有定义，本文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；本文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。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，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、特定顺序或主次关系。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。
在本文中提及“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。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)。
在本申请实施例的描述中，技术术语“长度”“宽度”“厚度”“内”“外”“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。
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。
电池单体包括电极组件和电解液，电极组件由正极极片、负极极片和隔离膜组成。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，未涂敷正极活性物质层的集流体作为正极极耳。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，未涂敷负极活性物质层的集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
电池单体包括外壳、电极端子、电极引出件及第一绝缘件，外壳包括壳体和盖体，电极组件设置于壳体内；电极端子穿设于盖体，电极组件的极耳连接于电极端子的一端，电极引出件连接于电极端子的另一端，电极引出件用于将电池单体的电能引出；第一绝缘件设置于第一壁和电极引出件之间，以绝缘隔离第一壁与电极引出件。电极引出件设置有通孔，以供电极端子穿设，电极引出件通常与电极端子铆接。
电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、放电容量、充放电倍率等性能参数，另外，还需要考虑电池的生产效率。
发明人研究发现，电池单体的生产过程中，第一绝缘件与电极引出件的装配通常是通过电极引出件设置的供电极端子穿过的通孔与第一绝缘件设置的供电极端子穿过的通孔的配合实现的，使得通孔的加工精度要求较高，如果通孔的加工误差较大时，电极引出件与第一绝缘件的配合较为困难，导致电池单体的装配效率较低，影响电池单体的生产效率。
鉴于此，为了解决第一绝缘件与电极引出件的装配困难导致电池单体的生产效率较低的问题，发明人经过深入研究，设计了一种电池单体，在第一绝缘件上设置第一定位部、在电极引出件上设置第二定位部，通过第一定位部与第二定位部相配合以实现第一绝缘件对电极引出件的定位，方便定位、方便装配，提高了电极引出件与第一绝缘件的装配便捷性，提高了电池单体的生产效率。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电设备中。可以使用具备本申请公开的电池单体、电池等组成该用电设备的电源系统。
本申请实施例提供一种使用电池作为电源的用电设备，用电设备可以为但不限于手机、平板电脑、笔记本电脑、电动玩具、电动工具、电动自行车、电动摩托车、电动汽车、轮船、航天器等等。其中，电动玩具可以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，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电设备为车辆1000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，用于车辆1000的电路系统，例如用于车辆1000的启动、导航和运行时的工作用电需求。
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的爆炸图。电池100包括箱体101和电池单体10，电池单体10容纳于箱体101内。其中，箱体101用于为电池单体10提供容纳空间，箱体101可以采用多种结构。在一些实施例中，箱体101可以包括第一子箱体1011和第二子箱体1012，第一子箱体1011与第二子箱体1012相互盖合，第一子箱体1011和第二子箱体1012共同限定出用于容纳电池单体10的容纳空间。第二子箱体1012可以为一端开口的空心结构，第一子箱体1011可以为板状结构，第一子箱体1011盖合于第二子箱体1012的开口侧，以使第一子箱体1011与第二子箱体1012共同限定出容纳空间；第一子箱体1011和第二子箱体1012也可以是均为一侧开口的空心结构，第一子箱体1011的开口侧盖合于第二子箱体1012的开口侧。
在电池100中，电池单体10可以是多个，多个电池单体10之间可串联或并联或混联，混联是指多个电池单体10中既有串联又有并联。多个电池单体10之间可直接串联或并联或混联在一起，再将多个电池单体10构成的整体容纳于箱体101内；当然，电池100也可以是多个电池单体10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101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20，用于实现多个电池单体10之间的电连接。
其中，电池单体10可以为二次电池或一次电池；电池单体10可以是锂离子电池、锂硫电池、钠离子电池或镁离子电池，但不局限于此。
请参照图3，图3为本申请一些实施例提供的电池单体的爆炸图。如图3所示，电池单体10包括外壳11、电极组件12、电极引出件13及电极端子15。外壳11包括壳体111和盖体112，壳体111具有开口，盖体112封闭开口，以将电池单体10的内部环境与外部环境隔绝。
壳体111是用于配合盖体112以形成电池单体10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12、电解液以及其他部件。壳体111和盖体112可以是独立的部件。壳体111可以是多种形状和多种尺寸的。具体地，壳体111的形状可以根据电极组件12的具体形状和尺寸大小来确定。壳体111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。本申请实施例以壳体111为长方体形为例介绍。
盖体112是指盖合于壳体111的开口处以将电池单体10的内部环境隔绝于外部环境的部件。不限地，盖体112的形状可以与壳体111的形状相适应以配合壳体111。可选地，盖体112可以由具有一定硬度和强度的材质(如铝合金)制成，这样，盖体112在受挤压碰撞时就不易发生形变，使电池单体10能够具备更高的结构强度，安全性能也可以有所提高。盖体112上可以设置有如电极端子15等的功能性部件。电极端子15可以用于与电极组件12电连接，以用于输出或输入电池单体10的电能。盖体112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，在盖体112的内侧还可以设置有第二绝 缘件17，第二绝缘件17可以用于隔离壳体111内的电连接部件与盖体112，以降低短路的风险。示例性的，第二绝缘件17可以是塑料、橡胶等。
电极组件12是电池单体10中发生电化学反应的部件。壳体111内可以包含一个或更多个电极组件12。电极组件12主要由正极极片和负极极片卷绕或层叠放置形成，并且通常在正极极片与负极极片之间设有隔离膜，隔离膜用于分隔正极极片和负极极片，以避免正极极片和负极极片内接短路。正极极片和负极极片具有活性物质的部分构成电芯组件的主体部，正极极片和负极极片不具有活性物质的部分各自构成极耳121。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121连接电极端子15以形成电流回路。
电极引出件13为用于将电池单体10的电能引出的部件，电极引出件13连接于电极端子15，汇流部件20(请参见图2)连接于电极引出件13。
电极引出件13和盖体112之间设置有第一绝缘件14，用于绝缘隔离电极引出件13与盖体112。
请参见图3，并进一步参见图4，图4为本申请一些实施例提供的电池单体的俯视图，图5为图4的A-A方向的剖视图，图6为图5的C处局部放大图。根据本申请的一些实施例，本申请提供了一种电池单体10。电池单体10包括外壳11、电极引出件13及第一绝缘件14。外壳11包括第一壁113，至少部分电极引出件13设置于第一壁113的背离电池单体10内部的一侧，电极引出件13用于将电池单体10的电能引出。至少部分第一绝缘件14设置于第一壁113与电极引出件13之间，以绝缘隔离第一壁113与电极引出件13。其中，第一绝缘件14包括第一定位部141，电极引出件13包括第二定位部131，第一定位部141与第二定位部131相配合以对电极引出件13进行定位。
第一壁113为外壳11的一个壁，第一壁113与外壳11的其他壁限定出容纳空间，电极组件12设置于该容纳空间内。
至少部分电极引出件13设置于第一壁113的背离电池单体10内部的一侧，可以为部分电极引出件13设置于第一壁113的背离电池单体10内部的一侧，或者，也可以为全部电极引出件13设置于第一壁113的背离电池单体10内部的一侧。这里的第一壁113的背离电池单体10内部的一侧是指，第一壁113的远离电极组件12的一侧。
至少部分第一绝缘件14设置于第一壁113与电极引出件13之间，可以为部分第一绝缘件14设置于第一壁113与电极引出件13之间，或者，也可以为全部第一绝缘件14设置于第一壁113与电极引出件13之间。
第一定位部141为第一绝缘件14的定位结构，第二定位部131为电极引出件13的定位结构，第一定位部141与第二定位部131相对应，并且第一定位部141与第二定位部131能够相互配合。当第一定位部141与第二定位部131相配合时，第一绝缘件14与电极引出件13实现定位装配。
根据本申请实施例的电池单体10，在第一绝缘件14上设置第一定位部141，在电极引出件13上设置第二定位部131，通过第一定位部141与第二定位部131相配合以实现第一绝缘件14对电极引出件13的定位，方便定位、方便装配，提高了电极引出件13与第一绝缘件14的装配便捷性，提高了电池单体10的生产效率。
根据本申请的一些实施例，第一定位部141与第二定位部131中的一者为第一凸起，第一定位部141与第二定位部131中的另一者为第一凹槽。
第一定位部141可以为第一凸起，第二定位部131可以为第一凹槽；或者，第一定位部141可以为第一凹槽，第二定位部131可以为第一凸起。
第一凸起与第一凹槽对应设置，第一凸起能够插入第一凹槽内，以实现第一绝缘件14与电极引出件13的装配。
在上述方案中，第一凸起与第一凹槽配合，结构简单，便于实现第一绝缘件14与电极引出件13的装配。
根据本申请的一些实施例，沿第一壁113的厚度方向Z，第一凸起在第一壁113上的投影呈多边形或椭圆形。
图中，字母Z所指示的方向为第一壁113的厚度方向。
例如，第一凸起在第一壁113上的投影呈方形。
在上述方案中，沿第一壁113的厚度方向Z，第一凸起在第一壁113上的投影呈多边形或椭圆形，能够限制电极引出件13相对于第一绝缘件14转动，提高电极引出件13与第一绝缘件14的定位精度。
根据本申请的一些实施例，第一定位部141的数量和第二定位部131的数量均为多个，第一定位部141与第二定位部131一一对应。
第一定位部141与第二定位部131一一对应，每个第一定位部141与一个第二定位部131配合。
多个第一定位部141和多个第二定位部131配合，能够在多个位置实现电极引出件13与第一绝缘件14的装配，能够限制电极引出件13相对于第一绝缘件14转动，使得第一绝缘件14对电极引出件13具有较高的定位效果。
请参见图6，并进一步参见图7和图8，图7为本申请一些实施例提供的电极引出件的结构示意图，图8为本申请一些实施例提供的第一绝缘件的结构示意图。根据本申请的一些实施例，第一绝缘件14包括背离第一壁113的第一表面14a，第一定位部141为凸出于第一表面14a的第一凸起，第二定位部131为第一凹槽。
第一表面14a为第一绝缘件14的背离第一壁113的表面。第一定位部141为凸出于第一表面14a的第一凸起，即第一凸起沿第一壁113的厚度方向Z凸出于第一表面14a。
第二定位部131为设置于电极引出件13的第一凹槽。第一凹槽可以由电极引出件13的靠近第一绝缘件14的表面向背离第一绝缘件14的方向凹陷形成。第一凹槽可以沿第一壁113的厚度方向Z不贯穿电极引出件13，或者，第一凹槽也可以沿第一壁113的厚度方向Z贯穿电极引出件13，例如，第一凹槽可以为类似通孔的结构。
在上述方案中，第一凹槽与第一凸起的配合结构，结构简单，便于加工，便于配合。
根据本申请的一些实施例，如图6所示，沿第一壁113的厚度方向Z，第一凸起的截面积由靠近第一壁113的一端向远离第一壁113的一端逐渐减小。
第一凸起的截面积是指，第一凸起被垂直于第一壁113的厚度方向Z的平面所截得的面积。
沿第一壁113的厚度方向Z，第一凸起在远离第一壁113的一端处的截面积最小，当第 一凸起插入第一凹槽时，能够引导第一凸起进入第一凹槽，方便第一凸起进入第一凹槽内，以降低第一凸起插入第一凹槽的难度。
根据本申请的一些实施例，如图7所示，第一凹槽延伸至电极引出件13的边缘。
电极引出件13包括背离第一绝缘件14的第五表面13a、面向第一绝缘件14的第六表面13b、以及侧面13c，第五表面13a和第六表面13b沿第一壁113的厚度方向Z相对设置，电极引出件13的侧面13c连接第五表面13a和第六表面13b。第一凹槽由第六表面13b朝向第五表面13a凹陷形成。
第一凹槽延伸至电极引出件13的边缘是指，第一凹槽延伸至电极引出件13的侧面13c。
在上述方案中，第一凹槽延伸至电极引出件13的边缘，便于从电极引出件13的边缘加工第一凹槽，降低加工难度。
根据本申请的一些实施例，如图7所示，第一凹槽沿电极引出件13的厚度方向贯穿电极引出件13。
电极引出件13的厚度方向可以与第一壁113的厚度方向Z平行。
第一凹槽沿电极引出件13的厚度方向贯穿电极引出件13，即第一凹槽沿电极引出件13的厚度方向由第六表面13b延伸至第五表面13a。
在上述方案中，第一凹槽贯穿电极引出件13，便于加工，能够降低电极引出件13的重量。
根据本申请的一些实施例，第一凹槽也可以沿电极引出件13的厚度方向不贯穿电极引出件13。
根据本申请的一些实施例，第一凸起凸出第一表面14a的高度为H1，满足0.5mm≤H1≤1.5mm。
第一凸起凸出第一表面14a的高度H1是指，沿第一壁113的厚度方向Z，第一凸起的远离第一表面14a的面与第一表面14a之间的距离。
可选地，第一凸起凸出第一表面14a的高度H1可以为0.5mm、0.75mm、1mm、1.25mm、1.5mm等。
第一凸起凸出第一表面14a的高度H1满足上述范围，使得第一凸起与第一凹槽具有较好的定位效果。如果第一凸起凸出第一表面14a的高度H1小于0.5mm，则第一凹槽与第一凸起之间的定位效果较差；如果第一凸起凸出第一表面14a的高度H1大于1.5mm，则第一凸起在第一壁113的厚度方向Z上占用较大的装配空间。
根据本申请的一些实施例，如图3和图7所示，电池单体10还包括两个电极端子15，两个电极端子15设置于第一壁113；电极引出件13设置有两个第一通孔132，两个第一通孔132分别用于安装两个电极端子15，第二定位部131位于两个第一通孔132之间。
为了方便介绍，这里提及的两个电极端子15可以为两个正极电极端子，或者可以为两个负极电极端子。需要指出的是，电池单体包括两个正极电极端子和两个负极电极端子，两个正极电极端子与一个电极引出件和一个第一绝缘件配合，两个负极电极端子与另一个电极引出件和另一个第一绝缘件配合。
两个第一通孔132与两个电极端子15一一对应，每个电极端子15安装于一个第一通孔132。
如图3和图7所示，两个第一通孔132沿第二方向Y间隔设置，第二方向Y可以为电池单体10的宽度方向。
可选地，电极端子15可以呈圆柱状，以便于加工制造。对应的，第一通孔132可以为圆孔。
第二定位部131位于两个第一通孔132之间，通过第二定位部131与第一定位部141配合来实现第一绝缘件14对电极引出件13的定位，能够降低第一通孔132的加工精度。
根据本申请的一些实施例，如图3、图6和图8所示，第一壁113包括第三定位部1131，第一绝缘件14包括第四定位部142，第三定位部1131与第四定位部142相配合以对第一绝缘件14进行定位。
第三定位部1131为第一壁113上的定位结构，第四定位部142为第一绝缘件14上的定位结构，第四定位部142与第三定位部1131对应设置，第四定位部142能够与第三定位部1131相配合。
通过第三定位部1131与第四定位部142配合，便于实现第一壁113对第一绝缘件14的定位，提高装配效率。
根据本申请的一些实施例，如图6和图8所示，沿第一壁113的厚度方向Z，第四定位部142在第一壁113上的投影围成的区域与第一定位部141在第一壁113上的投影至少部分重叠。
第四定位部142在第一壁113上的投影围成的区域，也即第四定位部142在第一壁113上的投影轮廓所围成的区域。第四定位部142在第一壁113上的投影围成的区域与第一定位部141在第一壁113上的投影至少部分重叠，可以为第四定位部142在第一壁113上的投影围成的区域与第一定位部141在第一壁113上的投影部分重叠，也可以为第四定位部142在第一壁113上的投影围成的区域与第一定位部141在第一壁113上的投影全部重叠。
在上述方案中，第四定位部142在第一壁113上围成的区域与第一定位部141在第一壁113上的投影至少部分重叠，使得第一绝缘件14的结构紧凑。
根据本申请的一些实施例，如图6和图8所示，沿第一壁113的厚度方向Z，第四定位部142在第一壁113上的投影落入第一定位部141在第一壁113上的投影内。
第四定位部142在第一壁113上的投影落入第一定位部141在第一壁113上的投影内，也即沿第一壁113的厚度方向Z，第四定位部142与第一定位部141重叠，使得第一绝缘件14的结构较为紧凑。
根据本申请的一些实施例，如图6和图8所示，第一绝缘件14包括背离第一壁113的第一表面14a和面向第一壁113的第二表面14b，第一定位部141设置于第一表面14a，第四定位部142设置于第二表面14b。
第一表面14a和第二表面14b为第一绝缘件14的厚度方向相对的两个表面，第一绝缘件14的厚度方向可以与第一壁113的厚度方向Z平行。第一定位部141为设置于第一表面14a的定位结构，第四定位部142为设置于第二表面14b的定位结构。
在上述方案中，第一定位部141和第四定位部142分别位于第一绝缘件14的相对的两个表面，以便于第一绝缘件14在第一壁113的厚度方向Z的相对两侧分别与电极引出件13和第一壁113的装配。
根据本申请的一些实施例，如图6和图8所示，第一壁113包括背离电池单体10内部 的第三表面113a，第三定位部1131为凸出于第三表面113a的第二凸起，第四定位部142为第二凹槽。
第二凹槽的形状可以为多种形式，本申请不作限定。例如，第二凹槽可以为长圆槽，即，第二凹槽的长度方向的两端为半圆结构，第二凹槽的中段呈线形。
第一壁113还包括面向电池单体10内部的第四表面(图中未示出)，第三表面113a和第四表面为第一壁113的厚度方向Z上相对的两个表面。第三定位部1131凸出于第三表面113a，第四定位部142为在第二表面14b凹陷形成的第二凹槽。在上述方案中，第三定位部1131为第二凸起，第四定位部142为第二凹槽，第二凸起与第二凹槽的配合结构，结构简单，便于加工。
根据本申请的一些实施例，如图6所示，第二凹槽沿第一绝缘件14的厚度方向贯穿第一绝缘件14。
第一绝缘件14的厚度方向可以与第一壁113的厚度方向Z平行。
第二凹槽沿第一绝缘件14的厚度方向贯穿第一绝缘件14，即第二凹槽沿第一绝缘件14的厚度方向由第二表面14b延伸至第一表面14a，即第二凹槽为通孔。
第四定位部142为通孔，第三定位部1131为第二凸起，第二凸起与设置于第一绝缘件14的通孔配合以实现第一壁113对第一绝缘件14的定位。
在上述方案中，第二凹槽贯穿第一绝缘件14，便于加工，能够降低第一绝缘件14的重量。
根据本申请的一些实施例，第二凸起凸出第三表面113a的高度为H2，满足0.3mm≤H2≤1.5mm。
第二凸起凸出第三表面113a的高度H2是指，沿第一壁113的厚度方向Z，第二凸起的远离第三表面113a的面与第三表面113a之间的距离。
可选地，第二凸起凸出第三表面113a的高度H2可以为0.3mm、0.4mm、0.5mm、0.6mm、0.7mm、0.8mm、0.9mm、1mm、1.1mm、1.2mm、1.3mm、1.4mm、1.5mm等。
第二凸起凸出第三表面113a的高度H2满足上述范围，使得第二凸起与第二凹槽具有较好的配合效果。如果第二凸起凸出第三表面113a的高度H2小于0.3mm，则第二凹槽与第二凸起之间的定位效果较差；如果第二凸起凸出第三表面113a的高度H2大于1.5mm，则第二凸起在第一壁113的厚度方向Z上占用较大的装配空间。
根据本申请的一些实施例，如图3和图8所示，电池单体10还包括两个电极端子15，两个电极端子15设置于第一壁113；第一绝缘件14设置有两个第二通孔143，两个第二通孔143分别用于安装两个电极端子15，第四定位部142位于两个第二通孔143之间。
两个第二通孔143沿第二方向Y间隔设置。可选地，第二通孔143可以为圆孔。
两个第二通孔143与两个电极端子15一一对应，每个电极端子15安装于一个第二通孔143。
第四定位部142位于两个第二通孔143之间，通过第四定位部142与第三定位部1131配合来实现第一壁113对第一绝缘件14的定位，能够降低第二通孔143的加工精度。
根据本申请的一些实施例，如图3所示，第一壁113设置有两个电极安装孔1132，两个电极安装孔1132分别用于安装两个电极端子15，电极安装孔1132的孔径为D1，第二通孔143的孔径为D2，满足D1<D2。
需要指出的是，这里提及的两个电极安装孔是指用于安装两个正极电极端子的孔，或者是安装两个负极电极端子的孔。对应的，第一壁113设置有另外两个电极安装孔1132，用于安装于前述两个电极端子15的极性相反的两个电极端子15。
两个电极安装孔1132与两个电极端子15一一对应，每个电极端子15安装于一个电极安装孔1132。如图3所示，两个电极安装孔1132沿第二方向Y间隔设置。可选地，电极安装孔1132可以为圆孔。
电极安装孔1132的孔径D1与第二通孔143的孔径D2满足上述关系，使得第二通孔143的加工精度较低，通过第四定位部142与第三定位部1131配合，即可实现第一壁113对第一绝缘件14的定位。
根据本申请的一些实施例，满足0.5mm≤D2-D1≤1mm。
可选地，第二通孔143的孔径D2与电极安装孔1132的孔径D1的差值D2-D1可以为0.5mm、0.6mm、0.7mm、0.8mm、0.9mm、1mm等。
第二通孔143的孔径D2与电极安装孔1132的孔径D1的差值满足上述关系，电极端子15与第二通孔143具有一定的装配间隙，便于实现第二通孔143与电极端子15的装配。如果第二通孔143的孔径D2与电极安装孔1132的孔径D1的差值过小，电极端子15与第二通孔143和电极安装孔1132的装配难度增大，则不利于第二通孔143与电极端子15的装配；如果第二通孔143的孔径D2与电极安装孔1132的孔径D1的差值过大，则电极端子15的外周面与第二通孔143的孔壁之间具有较大的间隙，第一绝缘件14与电极端子15的装配效果较差。
请参见图3，并进一步参见图9，图9为图4的B-B方向的剖视图。根据本申请的一些实施例，如图3所示，电池单体10还包括密封件18，密封件18套设于电极端子15，并且密封件18设置于电极端子15与电极安装孔1132之间。
密封件18为绝缘材质。密封件18可以为密封圈，以便于实现与电极端子15的装配。
可选地，部分密封件18的外径小于电极安装孔1132的孔径，以便于该部分密封件18跟随电极端子15插设于电极安装孔1132内。
根据本申请的一些实施例，如图3所示，外壳11包括壳体111和盖体112，壳体111具有开口，盖体112封闭开口，第一壁113为盖体112。
第一壁113为盖体112，便于实现第一绝缘件14与第一壁113的装配。
根据本申请的一些实施例，第一壁113为电池单体10的所有壁中面积最大的壁。
电池单体10可以呈长方体形，第一壁113为电池单体10的所有壁中面积最大的壁，换句话说，电池单体10的大面设置为第一壁113。第一壁113的厚度方向Z可以为电池单体10的厚度方向。
根据本申请的一些实施例，本申请还提供了一种电池100，如图2所示，电池100包括箱体101、汇流部件20和多个电池单体10。汇流部件20容纳于箱体101内。多个电池单体10沿第一壁113的厚度方向Z堆叠设置，多个电池单体10的电极引出件13通过汇流部件20电连接。
汇流部件20可以连接相邻两个电池单体10的电极引出件13，或者，汇流部件20也可以连接间隔设置的两个电池单体10的电极引出件13，例如，汇流部件20的一端连接于一个电池单体10的电极引出件13，汇流部件20的另一端连接于与该电池单体10相隔一个或者多个电池单体10的电极引出件13。
根据本申请实施例的电池100，汇流部件20与电极引出件13电连接，以便于实现多个电池单体10之间的电连接；采用上述的电池单体10，提高了电池100的生产效率。
请参见图3和图7，并进一步参见图10，图10为本申请一些实施例提供的电极引出件与第一壁的装配示意图。根据本申请的一些实施例，如图3和图7所示，电池单体10还包括电极组件12，电极组件12容纳于外壳11内，电极组件12具有极耳121；电极引出件13包括第一部分133和第二部分134，第一部分133与第一壁113平行，第一部分133与极耳121电连接，第二部分134与汇流部件20连接，第二部分134与汇流部件20的连接面所在的平面与第一壁113相交。
第一部分133和第二部分134为电极引出件13的两个部分。第一部分133与极耳121电连接，第二部分134与汇流部件20连接，以便于在不同的面实现电极引出件13与极耳121和汇流部件20的连接。
第一部分133与第一壁113平行，也即第一部分133的厚度方向与第一壁113的厚度方向Z平行。当第一壁113为有凸包的部件时，第一部分133与第一壁113的较平整、面积较大的部分平行。第一部分231与第一壁213平行是指，第一部分231与第一壁213相对设置，或者说，第一部分231最大的面与第一壁213相对设置，并不意味着，第一部分231沿第一壁213的厚度方向Z设置的两个表面均要与第一壁213平行。
第二部分134与汇流部件20的连接面13d所在的平面与第一壁113相交，例如，第二部分134与汇流部件20的连接面13d所在的平面与第一壁113之间的角度θ为60度-120度。较优的，第二部分134与汇流部件20的连接面13d所在的平面与第一壁113之间的角度θ为85度-95度。优选地，第二部分134与汇流部件20的连接面13d可以垂直于第一壁113。电池单体10还包括转接件16，第一部分133与极耳121电连接，第一部分133可以与极耳121通过电极端子15和转接件16电连接。例如，如图9所示，极耳121连接于转接件16，转接件16连接于电极端子15，电极端子15连接于第一部分133，从而实现极耳121与第一部分133的电连接。
电池100单体还包括第二绝缘件17，第二绝缘件17设置于第一壁与转接件16之间，用于绝缘隔离第一壁和转接件16。
在上述方案中，第二部分134与汇流部件20的连接面所在的平面与第一壁113相交，以便于实现电极引出件13与汇流部件20的连接。
第二部分134和第一部分133沿第一方向X依次设置，连接面13d为在第一方向X上，电极引出件13最靠近第一壁113边缘的面。
根据本申请的一些实施例，第二定位部131设置于第一部分133。
第二定位部131设置于第一部分133，便于实现电极引出件13与第一绝缘件14的装配，同时，便于第一部分133与极耳121电连接。
根据本申请的一些实施例，如图7和图9所示，第二部分134包括第一段1341、第二段1342和第三段1343，第一段1341从第一部分133朝着背离第一壁113的方向延伸，第二段1342在第一段1341的远离第一壁113的一端连接第一段1341和第三段1343，第三段1343从第二段1342向靠近第一壁113的方向延伸，汇流部件20连接于第三段1343的背离第一段1341的一侧。
第一段1341连接第一部分133，第二段1342连接第三段1343和第一段1341，第三段1343用于与第三段1343连接，结构简单，第二部分134可以折弯成型。
当第一部分133和第二部分134一体成型时，电极引出件13可以为折弯结构，使得第 二部分134能够发生变形以吸收膨胀应力。例如，电池100使用过程中，电池单体10因内部压力或温度升高而导致外壳11膨胀，电极引出件13能够发生形变，以吸收膨胀应力。
第二部分134可以呈U形，以便于加工制造。
根据本申请的一些实施例，如图8和图9所示，第一绝缘件14包括本体144和凸出部145，本体144设置于电极引出件13与第一壁113之间，凸出部145沿第一壁113的厚度方向Z凸出于本体144，凸出部145插设于第一段1341和第三段1343之间，第一定位部141设置于本体144。
可选地，凸出部145可以沿第一壁113的厚度方向Z朝背离电池单体10内部一侧凸出本体144。
在上述方案中，凸出部145插设于第一段1341和第三段1343之间，对第三段1343起到支撑作用，以便于第三段1343与汇流部件20焊接。
根据本申请的一些实施例，如图9所示，外壳11还具有与第一壁113相对设置的第二壁114，第二壁114的边缘内陷形成凹部1141，凹部1141用于容纳与第二壁114相邻的电池单体10的电极引出件13。
第二壁114和第一壁113为外壳11的沿第一壁113的厚度方向Z相对设置的两个壁。
第二壁114的边缘沿第一壁113的厚度方向Z朝向第一壁113凹陷形成凹部1141，凹部1141的凹陷深度大于电极引出件13凸出第一壁113的高度。
第二壁114的表面可以设置有绝缘层，以便于在多个电池单体10堆叠设置时，第二壁114与相邻的电池单体10的电极引出件13绝缘隔离。
在上述方案中，在多个电池单体10堆叠时，凹部1141的设置，能够容纳与第二壁114相邻电池单体10的电极引出件13，合理利用装配空间，使得电池100具有较高的能量密度。
根据本申请的一些实施例，本申请还提供了一种用电设备，用电设备包括上述任一实施例提供的电池单体10，电池单体10用于提供电能。
用电设备可以为前述任一应用电池单体10的装置或系统。
根据本申请的一些实施例，请参照图2至图9，本申请提供了一种电池单体10，该电池单体10呈扁平式长方体。电池单体10包括外壳11、电极组件12、电极引出件13、第一绝缘件14、电极端子15、转接件16、第二绝缘件17、密封件18。外壳11包括壳体111和盖体112，壳体111具有开口，盖体112封闭开口，盖体112为第一壁113。电极组件12设置于壳体111内，电极组件12具有极耳121。电极引出件13位于第一壁113的远离电池单体10内部一侧，电极引出件13包括第一部分133和第二部分134，第一部分133设置有第二定位部131，第二部分134和第一部分133沿第一方向X依次设置，第一方向X可以为电池单体10的长度方向；第二部分134的背离第一部分133的一侧用于与汇流部件20连接。第一绝缘件14设置于第一壁113和电极引出件13之间，以绝缘隔离第一壁113与电极引出件13。
电极引出件13包括背离第一绝缘件14的第五表面13a和面向第一绝缘件14的第六表面13b，第二定位部131为设置于第六表面13b的第一凹槽，第一凹槽由第六表面13b朝背离第一绝缘件14的方向凹陷形成，并且第一凹槽沿第一壁113的厚度方向Z贯穿电极引出件13。
第一绝缘件14包括背离第一壁113的第一表面14a和面向第一壁113的第二表面14b，第一绝缘件14包括第一定位部141和第四定位部142，第一定位部141为凸出于第一表面14a的第 一凸起，第四定位部142为设置于第二表面14b的第二凹槽。第一凸起插设于第一凹槽内，以对电极引出件13进行定位。
第一壁113包括背离电池单体10内部的第三表面113a和面向电池单体10内部的第四表面，第一壁113包括第三定位部1131，第三定位部1131为凸出于第三表面113a的第二凸起，第二凸起插设于第二凹槽内，以对第一绝缘件14进行定位。
本申请实施例提供的电池单体10，通过第一定位部141与第二定位部131配合，以便于实现第一绝缘件14对电极引出件13的定位；通过第三定位部1131与第四定位部142配合，以便于实现第一壁113对第一绝缘件14的定位，方便定位、方便装配，提高了电池单体10的生产效率。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。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 (29)

  1. 一种电池单体，包括：
    外壳，包括第一壁；
    电极引出件，至少部分设置于所述第一壁的背离所述电池单体内部的一侧，用于将所述电池单体的电能引出；
    第一绝缘件，至少部分设置于所述第一壁与所述电极引出件之间，以绝缘隔离所述第一壁与所述电极引出件；
    其中，所述第一绝缘件包括第一定位部，所述电极引出件包括第二定位部，所述第一定位部与所述第二定位部相配合以对所述电极引出件进行定位。
  2. 根据权利要求1所述的电池单体，其中，所述第一定位部与所述第二定位部中的一者为第一凸起，所述第一定位部与所述第二定位部中的另一者为第一凹槽。
  3. 根据权利要求2所述的电池单体，其中，沿所述第一壁的厚度方向，所述第一凸起在所述第一壁上的投影呈多边形或椭圆形。
  4. 根据权利要求1-3中任一项所述的电池单体，其中，所述第一定位部的数量和所述第二定位部的数量均为多个，所述第一定位部与所述第二定位部一一对应。
  5. 根据权利要求2所述的电池单体，其中，所述第一绝缘件包括背离所述第一壁的第一表面，所述第一定位部为凸出于所述第一表面的第一凸起，所述第二定位部为第一凹槽。
  6. 根据权利要求5所述的电池单体，其中，沿所述第一壁的厚度方向，所述第一凸起的截面积由靠近所述第一壁的一端向远离所述第一壁的一端逐渐减小。
  7. 根据权利要求5或6所述的电池单体，其中，所述第一凹槽延伸至所述电极引出件的边缘。
  8. 根据权利要求5-7中任一项所述的电池单体，其中，所述第一凹槽沿所述电极引出件的厚度方向贯穿所述电极引出件。
  9. 根据权利要求5-8中任一项所述的电池单体，其中，所述第一凸起凸出所述第一表面的高度为H1，满足0.5mm≤H1≤1.5mm。
  10. 根据权利要求1-9中任一项所述的电池单体，其中，所述电池单体还包括：
    两个电极端子，设置于所述第一壁；
    所述电极引出件设置有两个第一通孔，两个所述第一通孔分别用于安装两个所述电极端子，所述第二定位部位于两个所述第一通孔之间。
  11. 根据权利要求1-10中任一项所述的电池单体，其中，所述第一壁包括第三定位部，所述第一绝缘件包括第四定位部，所述第三定位部与所述第四定位部相配合以对所述第一绝缘件进行定位。
  12. 根据权利要求11所述的电池单体，其中，沿所述第一壁的厚度方向，所述第四定位部在所述第一壁上的投影围成的区域与所述第一定位部在所述第一壁上的投影至少部分重叠。
  13. 根据权利要求12所述的电池单体，其中，沿所述第一壁的厚度方向，所述第四定位部在所述第一壁上的投影落入所述第一定位部在所述第一壁上的投影内。
  14. 根据权利要求11所述的电池单体，其中，所述第一绝缘件包括背离所述第一壁的第一表面和面向所述第一壁的第二表面，所述第一定位部设置于所述第一表面，所述第四定位部设置于所述第二表面。
  15. 根据权利要求11-14中任一项所述的电池单体，其中，所述第一壁包括背离所述电池单体内部的第三表面，所述第三定位部为凸出于所述第三表面的第二凸起，所述第四定位部为第二凹槽。
  16. 根据权利要求15所述的电池单体，其中，所述第二凹槽沿所述第一绝缘件的厚度方向贯穿所述第一绝缘件。
  17. 根据权利要求15所述的电池单体，其中，所述第二凸起凸出所述第三表面的高度为H2，满足0.3mm≤H2≤1.5mm。
  18. 根据权利要求11-17中任一项所述的电池单体，其中，所述电池单体还包括：
    两个电极端子，设置于所述第一壁；
    所述第一绝缘件设置有两个第二通孔，两个所述第二通孔分别用于安装两个所述电极端子，所述第四定位部位于两个所述第二通孔之间。
  19. 根据权利要求18所述的电池单体，其中，所述第一壁设置有两个电极安装孔，两个所述电极安装孔分别用于安装两个所述电极端子，所述电极安装孔的孔径为D1，所述第二通孔的孔径为D2，满足D1<D2。
  20. 根据权利要求19所述的电池单体，其中，满足0.5mm≤D2-D1≤1mm。
  21. 根据权利要求1-20中任一项所述的电池单体，其中，所述外壳包括壳体和盖体，所述壳体具有开口，所述盖体封闭所述开口，所述第一壁为所述盖体。
  22. 根据权利要求1-21中任一项所述的电池单体，其中，所述第一壁为所述电池单体的所有壁中面积最大的壁。
  23. 一种电池，包括：
    箱体；
    汇流部件，容纳于所述箱体内；
    多个如权利要求1-22中任一项所述的电池单体，容纳于所述箱体内，多个所述电池单体沿所述第一壁的厚度方向堆叠设置，多个所述电池单体的所述电极引出件通过所述汇流部件电连接。
  24. 根据权利要求23所述的电池，其中，所述电池单体还包括电极组件，所述电极组件容纳于所述外壳内，所述电极组件具有极耳；
    所述电极引出件包括第一部分和第二部分，所述第一部分与所述第一壁平行，所述第一部分与所述极耳电连接，所述第二部分与所述汇流部件连接，所述第二部分与所述汇流部件的连接面所在的平面与所述第一壁相交。
  25. 根据权利要求24所述的电池，其中，所述第二定位部设置于所述第一部分。
  26. 根据权利要求24或25所述的电池，其中，所述第二部分包括第一段、第二段和第三段，所述第一段从所述第一部分朝着背离所述第一壁的方向延伸，所述第二段在所述第一段的远离所述第一壁的一端连接所述第一段和所述第三段，所述第三段从所述第二段向靠近所述第一壁的方向延伸，所述汇流部件连接于所述第三段的背离所述第一段的一侧。
  27. 根据权利要求26所述的电池，其中，所述第一绝缘件包括本体和凸出部，所述本体设置于所述电极引出件与所述第一壁之间，所述凸出部沿所述第一壁的厚度方向凸出于所述本体，所述凸出部插设于所述第一段和所述第三段之间，所述第一定位部设置于所述本体。
  28. 根据权利要求23-27中任一项所述的电池，其中，所述外壳还具有与所述第一壁相对设置的第二壁，所述第二壁的边缘内陷形成凹部，所述凹部用于容纳与所述第二壁相邻的所述电池单体 的所述电极引出件。
  29. 一种用电设备，包括如权利要求1-22中任一项所述的电池单体，所述电池单体用于提供电能。
PCT/CN2022/103108 2022-06-30 2022-06-30 电池单体、电池及用电设备 WO2024000507A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/103108 WO2024000507A1 (zh) 2022-06-30 2022-06-30 电池单体、电池及用电设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/103108 WO2024000507A1 (zh) 2022-06-30 2022-06-30 电池单体、电池及用电设备

Publications (1)

Publication Number Publication Date
WO2024000507A1 true WO2024000507A1 (zh) 2024-01-04

Family

ID=89383839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/103108 WO2024000507A1 (zh) 2022-06-30 2022-06-30 电池单体、电池及用电设备

Country Status (1)

Country Link
WO (1) WO2024000507A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004103368A (ja) * 2002-09-09 2004-04-02 Matsushita Electric Ind Co Ltd 扁平角形電池
CN207719263U (zh) * 2018-01-18 2018-08-10 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
CN214957075U (zh) * 2021-05-14 2021-11-30 中航锂电科技有限公司 电池和电池组
CN216850254U (zh) * 2022-03-16 2022-06-28 中创新航科技股份有限公司 电池及电池组
CN216850253U (zh) * 2022-03-16 2022-06-28 中创新航科技股份有限公司 电池及电池组
CN216850093U (zh) * 2022-03-16 2022-06-28 中创新航科技股份有限公司 电池及电池组

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004103368A (ja) * 2002-09-09 2004-04-02 Matsushita Electric Ind Co Ltd 扁平角形電池
CN207719263U (zh) * 2018-01-18 2018-08-10 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
CN214957075U (zh) * 2021-05-14 2021-11-30 中航锂电科技有限公司 电池和电池组
CN216850254U (zh) * 2022-03-16 2022-06-28 中创新航科技股份有限公司 电池及电池组
CN216850253U (zh) * 2022-03-16 2022-06-28 中创新航科技股份有限公司 电池及电池组
CN216850093U (zh) * 2022-03-16 2022-06-28 中创新航科技股份有限公司 电池及电池组

Similar Documents

Publication Publication Date Title
US11757161B2 (en) Battery cell, battery and electricity consuming device
WO2023174266A1 (zh) 壳体、电池单体、电池及用电设备
CN216529007U (zh) 电池单体、电池和用电设备
WO2023221598A1 (zh) 连接组件、电池单体、电池及用电设备
EP4270608A1 (en) Battery cell, battery and electric apparatus
WO2023186034A1 (zh) 端盖、电池单体、电池及用电设备
WO2023142894A1 (zh) 电池单体、电池及用电装置
WO2023143059A1 (zh) 电池单体、电池以及用电装置
CN219017777U (zh) 电池单体、电池、用电设备以及制备电池单体的装置
CN115064757B (zh) 电池单体、电池及用电装置
WO2023025104A1 (zh) 电池单体、电池以及用电装置
WO2024000507A1 (zh) 电池单体、电池及用电设备
WO2022226964A1 (zh) 连接部件、电池单体、电池及用电设备
WO2023097441A1 (zh) 电池单体、电池、用电装置及电池单体的制造方法
WO2024001058A1 (zh) 电池单体、电池及用电设备
WO2024021082A1 (zh) 电池及用电设备
WO2024000505A1 (zh) 电池及用电装置
WO2023108509A1 (zh) 集流构件、电池单体、电池及用电设备
WO2024031347A1 (zh) 端盖组件、电池组件、电池及用电设备
WO2024055144A1 (zh) 转接部件、电池单体、电池及用电装置
WO2023206083A1 (zh) 电池单体、电池及用电装置
WO2023240744A1 (zh) 电池单体、电池及用电装置
WO2024037361A1 (zh) 电池单体、电池和用电设备
WO2023221278A1 (zh) 壳体、电池单体、电池及用电设备
WO2024031353A1 (zh) 极片、电极组件、电池单体、电池及用电设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22948609

Country of ref document: EP

Kind code of ref document: A1