Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/531—Electrode connections inside a battery casing
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
  • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
  • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/04—Construction or manufacture in general
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
  • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
• • 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
  • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
  • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
  • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
  • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
  • H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/531—Electrode connections inside a battery casing
  • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/531—Electrode connections inside a battery casing
  • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
• • 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
  • H01M50/543—Terminals
  • H01M50/552—Terminals characterised by their shape
  • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/572—Means for preventing undesired use or discharge
  • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
  • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M2220/00—Batteries for particular applications
  • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
• • 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 belongs to the field of battery technology, and in particular relates to a battery cell, a battery and an electrical device.
• Battery cells are systems that can be combined with each other to harness new renewable energy.
• the embodiments of the present application provide a battery cell, a battery and an electrical device, which can directly connect the tabs to the electrode terminals and improve the energy density of the battery.
• a first aspect of the embodiment of the present application provides a battery cell, including a casing, an electrode terminal and an electrode assembly.
• the electrode terminal is arranged on the housing, and the electrode assembly is accommodated in the housing.
• the electrode assembly includes a main body and a tab, and the tab is removed from the main body.
• the end surface extends out, the tab includes a first connection part and a second connection part, the first connection part is used to connect the electrode terminal, the second connection part is connected to the main body part; along the In the length direction of the end surface, the first connecting portion at least partially exceeds the second connecting portion.
• the connectable range of the first connection part in the length direction of the end face can be expanded, making it easier for the first connection part to be directly connected to the electrode terminal , optimizing the internal structure of the battery cell, increasing the available space for the electrode assembly, and improving the energy density of the battery cell.
• the first connection part is connected to the electrode terminal to form a connection area, and along the length direction of the end surface, at least part of the connection area exceeds the second connection part.
• connection position between the first connection part and the electrode terminal can be located at the extended part of the first connection part, that is, the tab is led out If the position is not aligned with the electrode terminal, the tab can still be connected to the electrode terminal through the part of the first connecting part that exceeds the second connecting part.
• the size of the first connecting part is larger than the size of the second connecting part.
• the first connection part can obtain a larger area and facilitate the connection of electrode terminals.
• a gap is provided at the connection between the second connecting part and the main body part.
• the size of the connection position between the second connection part and the main body part can be reduced, thereby increasing the insulation between the second connection part and other components in the battery cell (such as the electrode assembly and the first wall). plate) to avoid interference between the second connection part and other components.
• the tab is L-shaped or T-shaped.
• the size of the first connecting portion in the length direction of the end face can be significantly increased, which facilitates the connection between the tab and the electrode terminal. Secondly, it also significantly reduces the size of the second connecting portion. The size of the connecting portion in the length direction of the end surface prevents the second connecting portion from contacting the bump.
• the tabs include a positive tab and a negative tab, both of the positive tab and the negative tab are disposed on the end face, and the positive tab and the negative tab are
• the negative electrode tabs respectively include a first connecting portion and a second connecting portion, and the first connecting portion of the positive electrode tab and the first connecting portion of the negative electrode tab extend in opposite directions.
• the tabs can meet the installation requirements of different types of electrode terminals.
• the electrode terminal is located on the second side of the positive electrode tab and the negative electrode tab.
• the two first connecting portions extend in a direction away from each other.
• the housing includes a first wall, the electrode terminal is disposed on the first wall, and the end surface faces the first wall.
• the electrode terminal is located at an end of the first wall, and the positive electrode tab and the negative electrode tab extend in a direction away from each other.
• the lead-out positions of the positive electrode tab and the negative electrode tab on the end surface can be gathered toward the middle. . Reduce the interference of the positive electrode tab and the negative electrode tab on the components on both sides. Secondly, it can also create a larger distance between the connection areas on the positive electrode tab and the negative electrode tab, improving the safety of the battery cells.
• the first wall faces the electrode assembly
• An insulating plate is also provided on one side of the first wall, and the insulating plate is used to insulate the first wall and the electrode assembly.
• the insulating plate is provided with a bump extending toward the end face, the bump is in contact with the end face, and along the length direction of the end face, the second The distance between the connecting part and the insulating member is L, L ⁇ 0.5mm.
• the short circuit problem caused by mutual extrusion and contact between the second connecting portion and the bump can be significantly reduced.
• the pole tabs include multi-layer sub-pole tabs. Among the two adjacent layers of the sub-pole tabs, the sub-pole tabs close to the electrode terminal are located on the end surface. The projection covers the projection of the sub-tab away from the electrode terminal.
• the sub-tab on the side close to the electrode terminal can completely include the sub-tab on the side far from the electrode terminal, thereby increasing the over-flow of the tab and reducing the Interference between the tab and the bump.
• the first connecting part is bent relative to the second connecting part.
• the space occupied by the tab can be reduced and the energy density of the battery cell can be improved.
• a second aspect of the embodiment of the present application provides a battery, including the above-mentioned battery cell.
• a third aspect of the embodiment of the present application provides an electrical device, including the above-mentioned battery cell, for providing electrical energy.
• the expansion can be expanded.
• the larger connectable range of the first connecting portion in the length direction of the end face facilitates direct connection of the first connecting portion with the electrode terminal, optimizing the internal structure of the battery cell, increasing the available space for the electrode assembly, and improving the performance of the battery cell. Energy Density.
• Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
• Figure 2 is a schematic structural diagram of a battery provided by some embodiments of the present application.
• Figure 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
• Figure 4 is a schematic structural diagram of an electrode assembly provided by some embodiments of the present application.
• FIG. 5 is a schematic structural diagram of an electrode assembly provided by other embodiments of the present application.
• Figure 6 is a schematic structural diagram of an electrode assembly provided by some embodiments of the present application.
• FIG. 7 is a schematic front structural view of the embodiment shown in FIG. 6 .
• Figure 8 is a schematic top view of the structure of the embodiment shown in Figure 6
• Figure 9 is a schematic diagram of the internal structure of a battery cell provided by some embodiments of the present application.
• Figure 10 is a schematic structural diagram of the electrode terminal in Figure 9.
• FIG 11 is a schematic structural diagram of an electrode assembly provided by still some embodiments of the present application.
• Electrode assembly 1000. Vehicle; 100. Battery; 200. Controller; 300. Motor; 110. Box; 111. First box part; 112. Second box part; 101. Shell; 1011. End cover; 1012. Housing; 102. Electrode terminal; 103. Electrode assembly; 1. Main body part; 11. End face; 2 , pole tab; 201, positive pole tab; 202, negative pole tab; 21, first connection part; 211, connection area; 212, first edge; 213, second edge; 22, second connection part; 221, third One end; 222, second end; 23, notch; 3, insulating plate; 31, bump.
• an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may 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.
• association relationship of objects means that there can be three relationships, such as A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone.
• a and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.
• the character "/" in this article generally indicates that the related objects are an "or" relationship.
• multiple refers to more than two (including two).
• multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
• the battery cell usually includes a casing and an electrode assembly.
• the electrode assembly is the battery's electrical An important part of the chemical process, it usually consists of pole pieces and separators.
• the pole pieces include positive pole pieces and negative pole pieces.
• the positive electrode sheet and the negative electrode sheet include a current collector and an active material layer coated on it.
• the electrochemical process mainly relies on the movement of metal ions such as lithium ions in the active material layer between the positive electrode sheet and the negative electrode sheet. Therefore, the energy of the battery cell Density is closely related to the volume ratio of the electrode assembly.
• the electrode terminal The lead is provided with tabs for connecting to the electrode terminals.
• the tabs and the electrode terminals are usually connected through connecting parts. Obviously, the connecting parts are provided It will occupy additional space in the casing, reducing the space available for the electrode assembly, resulting in a decrease in the capacity density of the battery cell.
• the inventor found that the structure of the tabs can be adjusted so that the tabs can still be efficiently connected to the electrode terminals without providing connecting parts, thereby reducing the number of steps inside the casing.
• the structure increases the space occupied by the electrode assembly, thereby increasing the energy density of the battery.
• the inventor of the present application designed a battery cell, a battery and a power device after in-depth research.
• Embodiments of the present application provide an electrical device that uses a battery as a power source.
• the electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc.
• 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 electric device 1000 according to an embodiment of the present application is used as an example.
• FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
• the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
• the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
• the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
• the vehicle 1000 may also include a controller 200 and a motor 300 .
• the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
• the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
• the battery mentioned refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
• the battery mentioned in this application may include a battery module or a battery pack.
• FIG. 2 is a schematic structural diagram of a battery 100 provided by some embodiments of the present application.
• the battery 100 includes a box 110.
• the box 110 may include a connected first box part 111 and a second box part 112. Multiple battery cells are connected in parallel or in series or in a mixed combination.
• the rear part is placed in the space formed by connecting the first box part 111 and the second box part 112.
• the shapes of the first box part 111 and the second box part 112 can be based on the shapes formed by combining a plurality of battery cells.
• the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which are not limited in the embodiments of the present application.
• the packaging methods of the battery cells include but are not limited to cylindrical battery cells, rectangular battery cells, soft-pack battery cells, etc., and the embodiments of the present application are not specifically limited to this.
• the battery 100 may also include other structures, such as bus components, for realizing electrical connections between multiple battery cells, which will not be described in detail here.
• Figure 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
• Figure 4 is a schematic structural diagram of the electrode assembly 103 provided by some embodiments of the present application.
• some embodiments of the present application provide a battery cell 10 , including a casing 101 , an electrode terminal 102 and an electrode assembly 103 .
• the electrode terminal 102 is provided on the housing 101, and the electrode assembly 103 is accommodated in the housing 101.
• the electrode assembly 103 includes a main body 1 and a tab 2.
• the tab 2 extends from the end surface 11 of the main body 1.
• the tab 2 includes a first connection. 21 and the second connection part 22.
• the first connection part 21 is used to connect the electrode terminal 102, and the second connection part 22 is connected to the main body part 1; along the length direction of the end surface (the x-axis direction in Figure 4), the first connection part 21 at least partially extends beyond the second connecting portion 22 .
• the casing 101 is a component used to form an internal environment of the battery cell.
• the formed internal environment can be used to accommodate the electrode assembly 103, the electrolyte (not shown in the figure), and other components.
• the shell 101 can be in various structural forms, such as rectangular parallelepiped, cylinder, etc.
• the shape of the housing 101 may be determined according to the specific shape of the electrode assembly 103 .
• the housing 101 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 electrode assembly 103 is a component used in the battery cell for electrochemical reactions to occur.
• the electrode assembly 103 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets.
• the portion of the positive electrode sheet containing active material, the portion of the negative electrode sheet containing active material, and the separator constitute the main body 1 of the electrode assembly 103 , and the portions of the positive electrode sheet and the negative electrode sheet without active material each constitute the tab 2 .
• the positive active material and the negative active material react with the electrolyte, and the tab 2 is connected to the electrode terminal 102 to form a current loop.
• the electrode terminal 102 is used to electrically connect with the tab 2, and the power supply can be extracted or introduced from the battery cell.
• one end of the electrode terminal 102 is disposed in the housing 101 and connected to the tab 2, The other end is arranged outside the housing 101.
• the connectable range of the first connecting portion 21 in the length direction of the end surface can be expanded, so that the first connecting portion 21 can be directly connected to the electrode terminal 102
• the connection optimizes the internal structure of the battery cell, increases the available space for the electrode assembly 103, and improves the energy density of the battery cell.
• the housing 101 may include a housing 1012 and an end cover 1011.
• the housing 1012 is a hollow structure with one side open.
• the end cover 1011 covers the opening of the housing 1012 and forms a sealed connection to form a structure for accommodating electrodes. Sealed space between component 103 and electrolyte.
• the electrode terminal 102 is disposed on the end cap 1011.
• the electrode terminal 102 may include a positive electrode terminal 102 and a negative electrode terminal 102.
• the positive electrode terminal 102 and the negative electrode terminal 102 are used to connect with the positive electrode tab and the negative electrode tab on the electrode assembly 103.
• the electrical energy generated by the electrode assembly 103 is output.
• the shell 101 can also be of other structures.
• the shell 101 includes a shell 1012 and two end caps 1011.
• the shell 1012 is a hollow structure with openings on opposite sides, and one end cap 1011 is correspondingly covered with the shell.
• An opening of 1012 is formed into a sealed connection to form a sealed space for accommodating the electrode assembly 103 and the electrolyte.
• the positive electrode terminal 102 and the negative electrode terminal 102 can be installed on the same end cap 1011 or on different end caps 1011
• FIG. 5 is a schematic structural diagram of an electrode assembly 103 provided by other embodiments of the present application.
• the second connecting portion 22 includes a first end 221 and a second end 222 that are oppositely arranged.
• the connecting portion 21 extends beyond at least one of the first end 221 and the second end 222 .
• FIG. 6 is a schematic structural diagram of the electrode assembly 103 provided in some embodiments of the present application.
• FIG. 7 is a schematic structural diagram of the front view of the embodiment shown in FIG. 6 .
• FIG. 8 is a schematic structural diagram of the top view of the embodiment shown in FIG. 6 .
• the first connecting portion 21 includes a first edge 212 and a second edge 213.
• the first edge and the second edge 213 can be sandwiched by the width direction of the end surface (the y-axis direction in Figures 6 and 8). corner settings.
• the first edge 212 and the second edge 213 may be straight lines or curved lines.
• the first end 221 and the second end 222 are arranged at an angle with the direction perpendicular to the end surface (z-axis direction in FIG. 7 ).
• the first connecting portion 21 when the extending direction of the first connecting portion 21 can be arranged perpendicularly to the width direction of the end surface, and the extending direction of the second connecting portion 22 can be arranged parallel to the direction perpendicular to the end surface, in the length direction of the end surface, the first The connecting part 21 and the second connecting part 22 are disposed in an offset position.
• the size of the first connecting portion 21 may be smaller than the size of the second connecting portion 22 in the length direction of the end surface.
• the first connection part 21 is connected to the electrode terminal 102 to form a connection area 211 , along the length direction of the end surface (the x-axis direction in FIGS. 4 to 6 ), at least part of the connection area exceeds the second connection part 22.
• connection area 211 is the connection area between the first connection part 21 and the electrode terminal 102 after the two are connected.
• the first connection part 21 and the electrode terminal 102 are welded.
• the connection area 211 is the welding area formed by welding.
• the first connection part 21 is bonded to the electrode terminal 102, and the connection area 211 is the bonding area formed by bonding.
• connection position between the first connection part 21 and the electrode terminal 102 can be located at the extended part of the first connection part 21 , that is, the tab. Even if the lead-out position of 2 is not aligned with the electrode terminal 102, the tab 2 can still be connected to the electrode terminal 102 through the portion of the first connecting portion 21 that exceeds the second connecting portion 22.
• the second connection part 22 includes a first end 221 and a second end 222 that are oppositely arranged, and the connection area 211 may be partially provided. It can also be entirely provided outside the first end 221 and the second end 222 .
• the size of the first connecting part 21 is larger than the size of the second connecting part 22 .
• the first connection part 21 can obtain a larger area and facilitate connection to the electrode terminal 102 .
• a notch 23 is provided at the connection between the second connecting part 22 and the main body part 1 .
• the size of the location where the second connection part 22 is connected to the main body 1 can be reduced, thereby increasing the insulation between the second connection part 22 and other components in the battery cell (such as the electrode assembly and the first wall). plate) to avoid interference between the second connecting part 22 and other components.
• the tab 2 is L-shaped or T-shaped.
• the size of the first connecting portion 21 in the end face length direction can be significantly increased, which facilitates the connection between the tab 2 and the electrode terminal 102 .
• the second connecting portion 22 in the length direction of the end surface also significantly reduces the size of the second connecting portion 22 in the length direction of the end surface, preventing the second connecting portion 22 from contacting the bump 31 .
• the pole lug 2 when the pole lug 2 is L-shaped, the L-shaped horizontal section is the first connecting portion 21 , and the vertical section of the L-shaped horizontal section is the second connecting portion 22 .
• the pole lug 2 when the pole lug 2 is T-shaped, one of the two sides connected to the center of the other side is the first connecting portion 21 and the other is the second connecting portion 22 .
• the tab 2 includes a positive tab 201 and a negative tab 202.
• the positive tab 201 and the negative tab 202 are both disposed on the end surface.
• the lug 201 and the negative electrode lug 202 respectively include a first connecting part 21 and a second connecting part 22.
• the extension of the first connecting part 21 of the positive electrode lug 201 and the first connecting part 21 of the negative electrode lug 202 The stretching direction is opposite.
• the first connecting portion 21 of the positive electrode tab 201 and the first connecting portion 21 of the negative electrode tab 202 extend in opposite directions, which refers to the first connecting portion 21 of the positive electrode tab 201 and the first connecting portion 21 of the negative electrode tab 202
• the first connecting portion 21 of the positive electrode tab 201 and the first connecting portion 21 of the negative electrode tab 202 may extend in a direction away from each other.
• the tab 201 can meet the installation requirements of different types of electrode terminals 102.
• the electrode terminal 102 is located on the third side of the positive electrode tab 201 and the negative electrode tab 202.
• the two first connecting portions 21 extend in a direction approaching each other. Extend in opposite directions.
• FIG. 9 is a schematic diagram of the internal structure of a battery cell provided by some embodiments of the present application.
• FIG. 10 is a schematic structural diagram of the electrode terminal 102 in FIG. 9 .
• the housing 101 includes a first wall, the electrode terminal 102 is disposed on the first wall, and the end surface 11 faces the first wall.
• the electrode terminal 102 is located at the end of the first wall, and the positive electrode tab 201 and the negative electrode tab 202 extend away from each other.
• the lead-out positions of the positive electrode tab 201 and the negative electrode tab 202 on the end surface 11 can be directed toward The central part is gathered to reduce the interference of the positive electrode tab 201 and the negative electrode tab 202 on the components on both sides. Secondly, it can make a larger distance between the connection areas on the positive electrode tab 201 and the negative electrode tab 202, thereby improving the safety of the battery cells. sex.
• an insulating plate 3 is provided on the side of the first wall facing the electrode assembly 103.
• the insulating plate 3 is used to insulate the first wall. and electrode assembly 103.
• the insulation board 3 can be made of plastic, rubber and other materials.
• the insulating plate 3 is provided with a protrusion 31 extending toward the end face.
• the protrusion 31 is in contact with the end face.
• the protrusion 31 can be reduced in size. The shaking of the small electrode assembly 103.
• the distance between the second connecting portion 22 and the insulating member is L, and L ⁇ 0.5 mm.
• the distance between the second connecting part 22 and the insulating member is L, satisfying 0.5mm ⁇ L ⁇ 70mm.
• the distance L between the second connecting part 22 and the insulating member may be 1 mm, 3 mm, 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, or 60 mm.
• the bumps 31 include at least three, respectively corresponding to both sides and the middle of the end surface.
• the distance between the second connecting portion 22 and the insulator can be the distance between the second connecting portion 22 of the positive electrode tab and the insulating member.
• the distance between one bump 31 and the distance between the second connection part 22 and the insulator may also be the distance between the second connection part 22 of the negative electrode tab and one bump 31 .
• FIG 11 is a schematic structural diagram of an electrode assembly 103 provided in some embodiments of the present application.
• the pole tab 2 includes a multi-layer sub-pole tab.
• the projection of the sub-pole tab close to the electrode terminal 102 on the end surface covers The projection of the sub-tab away from the electrode terminal 102.
• the tab 2 is composed of multi-layer sub-tabs. The lugs are formed by superposition.
• the bending angle of the sub-lugs on the inner layer is smaller, while the bending angle of the sub-lugs on the outer layer is larger. Therefore, when the same size is set, the bending angle of the sub-lugs after bending is 2
• the edges are uneven and difficult to standardize and control, causing the electrode assembly 103 to easily interfere with the housing 101 after being inserted into the housing.
• the areas of the sub-lugs are equal or proportional. increase.
• the area of the first connection portion 21 on the sub-lug increases equally or proportionally.
• the first connecting part 21 is bent relative to the second connecting part 22 .
• the space occupied by the tab 2 can be reduced and the energy density of the battery cell can be improved.
• a battery is also provided, including the above-mentioned battery cell.
• an electrical device including the above-mentioned battery cell, for providing electrical energy.
• a battery cell including a casing 101, an electrode terminal 102 and an electrode assembly 103.
• the electrode terminal 102 is provided on the housing 101, and the electrode assembly 103 is accommodated in the housing 101.
• the electrode assembly 103 includes a main body 1 and a tab 2.
• the tab 2 extends from the end surface 11 of the main body 1.
• the tab 2 includes a first connection. 21 and the second connecting part 22.
• the first connecting part 21 is bent relative to the second connecting part 22.
• the first connecting part 21 is used to connect the electrode terminal 102, and the second connecting part 22 is connected to the main body part 1; along the end surface 11, the first connecting part 21 at least partially exceeds the second connecting part 22.
• the first connection part 21 is connected to the electrode terminal 102 to form a connection area, and the connection area exceeds the second connection part 22 along the length direction of the end surface. Along the length direction of the end surface, the size of the first connecting portion 21 is larger than the size of the second connecting portion 22 .
• the pole lug 2 is L-shaped or T-shaped.
• the pole tab 2 includes a positive pole tab 201 and a negative pole tab 202.
• the positive pole tab 201 and the negative pole tab 202 are both arranged on the end surface.
• the positive pole tab 201 and the negative pole tab 202 respectively include a first connecting part 21 and a second connecting part 22.
• the housing 101 includes a first wall, the electrode terminal 102 is disposed on the first wall, and the end surface faces the first wall.
• the electrode terminal 102 is located at the end of the first wall, and the positive electrode tab and the negative electrode tab extend away from each other.
• the first wall faces the electricity
• An insulating plate 3 is also provided on one side of the electrode assembly 103, and the insulating plate 3 is used to insulate the first wall and the electrode assembly 103.
• the insulating plate 3 is provided with a protrusion 31 extending toward the end face. The protrusion 31 abuts the end face.
• the distance between the second connecting portion 22 and the insulator is L, L ⁇ 0.5 mm.
• the tab 2 includes multiple layers of sub tabs. Among two adjacent layers of sub tabs, the projection on the end surface of the sub tab close to the electrode terminal 102 covers the projection of the sub tab far away from the electrode terminal 102 .
• the first connection part 21 can be enlarged by disposing the first connection part 21 beyond the second connection part 22 in the end surface length direction.
• the connectable range in the length direction of the end surface facilitates the direct connection of the first connecting part 21 with the electrode terminal 102, optimizing the internal structure of the battery cell, increasing the available space of the electrode assembly 103, and improving the energy density of the battery cell. .

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• Chemical & Material Sciences (AREA)
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• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Connection Of Batteries Or Terminals (AREA)

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• 2022
  • 2022-07-14 CN CN202210823644.5A patent/CN117438749A/zh active Pending
• 2023
  • 2023-06-13 WO PCT/CN2023/099862 patent/WO2024012127A1/zh not_active Ceased
  • 2023-06-13 JP JP2025501519A patent/JP2025524648A/ja active Pending
  • 2023-06-13 EP EP23838621.3A patent/EP4539243A4/en active Pending
  • 2023-06-13 KR KR1020257002588A patent/KR20250029170A/ko active Pending
• 2025
  • 2025-01-09 US US19/015,145 patent/US12469936B2/en active Active

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