WO2024098257A1 - 电池单体、电池及用电装置 - Google Patents
电池单体、电池及用电装置 Download PDFInfo
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- WO2024098257A1 WO2024098257A1 PCT/CN2022/130664 CN2022130664W WO2024098257A1 WO 2024098257 A1 WO2024098257 A1 WO 2024098257A1 CN 2022130664 W CN2022130664 W CN 2022130664W WO 2024098257 A1 WO2024098257 A1 WO 2024098257A1
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- Prior art keywords
- battery cell
- bottom wall
- groove
- along
- pole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- H01M50/543—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
- H01M50/557—Plate-shaped terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/668—Means for preventing spilling of liquid or electrolyte, e.g. when the battery is tilted or turned over
-
- 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
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- 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 an electrical device.
- the embodiments of the present application provide a battery cell, a battery, and an electrical device, which can effectively improve the service life and safety of the battery cell.
- an embodiment of the present application provides a battery cell, comprising a shell, an end cover, an electrode assembly and a pole;
- the shell comprises an integrally formed bottom wall and side wall, the side wall is arranged around the bottom wall, along a first direction, the bottom wall is arranged at one end of the side wall, and the other end of the side wall forms an opening;
- the end cover covers the opening, and the end cover and the bottom wall are arranged opposite to each other along the first direction;
- the electrode assembly is accommodated in the shell, and along the first direction, the bottom wall is configured to support the electrode assembly;
- the pole is arranged on the bottom wall, and the pole is electrically connected to the electrode assembly.
- the pole of the battery cell is arranged on the bottom wall of the shell that is arranged opposite to the end cover in the first direction, the bottom wall and the side wall are an integrated structure, and the bottom wall is used to support the electrode assembly, that is, the battery cell is inverted, so that the bottom wall of the battery cell with the pole is arranged downward, and the end cover of the electrode assembly is arranged upward.
- the battery cell adopting this structure can, on the one hand, alleviate the phenomenon that the force is transmitted to the shell and the end cover through the pole when the battery's current collecting component pulls or twists the pole during use, so as to alleviate the pulling between the end cover and the shell, thereby effectively reducing the risk of connection failure between the end cover and the shell, which is beneficial to improving the safety and service life of the battery cell.
- the pole and the end cover are respectively located at the two ends of the battery cell in the first direction, and the end cover is located on the top of the battery cell, it can alleviate the phenomenon that the battery cell leaks when the connection between the end cover and the shell fails or deforms, thereby improving the safety of the battery cell.
- the electrode assembly includes a main body and a pole ear protruding from the main body, and the pole ear is electrically connected to the pole;
- the battery cell also includes a support member, and along the first direction, at least a portion of the support member is arranged between the bottom wall and the main body, and the bottom wall supports the main body through the support member.
- the battery cell is provided with a support member located between the bottom wall of the shell and the main body of the electrode assembly in the first direction, so that the bottom wall can support the main body of the electrode assembly through the support member.
- the battery cell adopting this structure can increase the force-bearing area of the main body of the electrode assembly, which is beneficial to alleviate the phenomenon that the local stress of the main body of the electrode assembly is excessive due to the force on the local area of the main body, and thus can effectively reduce the risk of the main body of the electrode assembly being damaged during use, so as to improve the service life of the electrode assembly.
- the pole tab protrudes from one end of the main body facing the bottom wall, and the pole tab is bent around the support member.
- the pole ear is connected to the end of the main body facing the bottom wall in the first direction, and the pole ear is bent around the support member and then electrically connected to the pole post, so that the part of the pole ear connected to the pole post is located on the side of the support member away from the main body, thereby effectively alleviating the phenomenon of the pole ear being invertedly inserted into the main body of the electrode assembly during assembly or use, which is beneficial to reduce the short circuit risk of the battery cell and improve the safety of the battery cell.
- the pole ear includes a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence, the first connecting segment is connected to the main body, and the third connecting segment is connected to the pole; along the first direction, the first connecting segment is located on the side of the support member facing the main body, and the third connecting segment is located on the side of the support member facing the bottom wall; along the second direction, the second connecting segment is located at one end of the support member, and the second direction is perpendicular to the first direction.
- the pole ear has a first connecting section, a second connecting section and a third connecting section which are connected in sequence, the first connecting section and the third connecting section are respectively located on both sides of the support member, the second connecting section is located at one end of the support member in the second direction, and the first connecting section and the third connecting section are respectively connected to the main body and the pole, so as to realize a structure in which the pole ear is bent around the support member, so that the pole ear can be formed with a third connecting section which is located on the side of the support member facing the bottom wall in the first direction and is used to be connected to the pole.
- the battery cell includes two electrode assemblies; along the second direction, the main bodies of the two electrode assemblies are stacked along the second direction, and the tabs of the two electrode assemblies are respectively bent around the two ends of the support member, and the second direction is perpendicular to the first direction.
- the battery cell is provided with two electrode assemblies stacked along the second direction, and the pole ears of the two electrode assemblies are bent around the two ends of the support member in the second direction, so that the pole ears of the two electrode assemblies can be connected to the poles after bypassing the support member, so as to alleviate the phenomenon that the pole ears of the two electrode assemblies are invertedly inserted into the main body of the electrode assembly during assembly or use, which is beneficial to further reduce the safety hazards of the battery cell during use.
- the battery cell further includes a current collecting member; along the first direction, at least a portion of the current collecting member is disposed between the support member and the bottom wall, and the current collecting member connects the electrode tab and the electrode column.
- the battery cell is also provided with a current collecting component located between the support member and the bottom wall in the first direction, so that the current collecting component can connect the pole lug and the pole column to achieve electrical connection between the pole lug and the pole column.
- a current collecting component located between the support member and the bottom wall in the first direction, so that the current collecting component can connect the pole lug and the pole column to achieve electrical connection between the pole lug and the pole column.
- the battery cell further includes a first insulating member; along the first direction, at least a portion of the first insulating member is disposed between the current collecting member and the bottom wall to insulate and isolate the current collecting member from the bottom wall.
- the battery cell is also provided with a first insulating member located between the current collecting member and the bottom wall in the first direction.
- the first insulating member can play a role of insulating and isolating the current collecting member and the bottom wall to reduce the risk of short circuit between the current collecting member and the bottom wall, thereby helping to improve the safety of the battery cell during use and reduce the risk of using the battery cell.
- the bottom wall has a first surface facing away from the electrode assembly, the first surface is provided with a groove, the bottom wall of the groove forms a pressure relief portion, and the pressure relief portion is configured to release the internal pressure of the battery cell.
- a groove recessed toward the interior of the battery cell is provided on the first surface of the bottom wall, and the bottom wall of the groove forms a pressure relief portion for releasing the internal pressure of the battery cell, so as to release the pressure inside the battery cell when the battery cell thermally runs away.
- This structure enables the pressure relief portion to be spaced apart from the first surface of the bottom wall, and closer to the electrode assembly than the first surface. On the one hand, it can provide a certain degree of protection for the pressure relief portion, so as to reduce the risk of wear or damage of the pressure relief portion by the external environment, thereby reducing the phenomenon of premature valve opening of the pressure relief portion.
- a distance H between the pressure relief portion and the first surface satisfies 1 mm ⁇ H ⁇ 5 mm.
- the bottom wall has a second surface facing the electrode assembly, and a protrusion is formed on the bottom wall at a position corresponding to the groove, and the protrusion protrudes from the second surface.
- a protrusion protruding from the second surface is formed at a position of the bottom wall corresponding to the groove, so that the pressure relief portion protrudes from the second surface toward the electrode assembly.
- This structure is convenient for forming a groove on the bottom wall that is recessed toward the electrode assembly, and can also enhance the structural strength between the pressure relief portion and the bottom wall.
- the groove includes a first groove and a second groove continuously arranged along the first direction, the first groove is arranged on the first surface, and the groove side surface of the first groove is connected to the groove side surface of the second groove through the groove bottom surface of the first groove.
- the groove is provided with a first groove and a second groove which are continuously arranged in a first direction toward the direction facing the electrode assembly, and the groove side surface of the first groove is connected with the groove side surface of the second groove through the groove bottom surface of the first groove, that is, the second groove is arranged on the groove bottom surface of the first groove, so that a step structure is formed between the pressure relief part and the bottom wall, which is beneficial to further enhance the structural strength between the pressure relief part and the bottom wall.
- the outer peripheral surface of the protrusion is set at an obtuse angle to the second surface, and along the first direction, the protrusion has a third surface facing the electrode assembly, and the projection of the edge of the third surface in the first direction is located within the bottom surface of the first groove.
- the distance between the outer peripheral surface of the protrusion and the bottom surface of the first groove in the first direction gradually decreases from the edge of the third surface to the second surface, so that the thickness of the protrusion in the first direction gradually decreases, thereby realizing that the protrusion is formed with a region with stronger strength and a region with gradually reduced strength, so as to realize that the region between the pressure relief part and the bottom wall has a structure from strong to weak, thereby ensuring the structural strength of the pressure relief part connected to the bottom wall while absorbing the stress and energy transmitted from the bottom wall through the region with weakened strength, so as to reduce the influence of the stress and energy on the bottom wall on the pressure relief part, thereby reducing the risk of deformation of the pressure relief part due to the influence of the bottom
- a bottom wall of the second groove forms the pressure relief portion.
- the bottom wall of the second groove is set as a pressure relief portion for releasing the internal pressure of the battery cell, that is, the groove is only provided with the first groove and the second groove.
- a blocking portion is protruded from the first surface, and the blocking portion surrounds the outer side of the groove.
- a blocking portion is protruding from the first surface and surrounding the outer side of the groove, that is, the blocking portion is an annular structure surrounding the outer side of the groove.
- the battery cell of this structure can block the electrolyte through the blocking portion to reduce the phenomenon of the electrolyte flowing from the first surface into the groove, thereby reducing the influence of the electrolyte on the pressure relief portion.
- the thickness of the bottom wall is greater than the thickness of the side wall.
- the thickness of the bottom wall is set to be greater than the thickness of the side wall to improve the structural strength of the bottom wall, thereby ensuring the structural stability of the pole installed on the bottom wall and improving the bearing capacity of the bottom wall for the electrode assembly to alleviate the deformation of the bottom wall during use.
- the thickness of the bottom wall is equal to the thickness of the side wall.
- the bottom wall and side wall of the integrated structure can be directly formed by stamping and other processes without adding other processing techniques, which is conducive to reducing the manufacturing difficulty of the shell.
- the thickness of the sidewall is greater than the thickness of the end cap.
- the thickness of the side wall is set to be greater than the thickness of the end cover, since no pole or other components are provided on the end cover, it is helpful to reduce the space occupied by the end cover, so as to improve the energy density and capacity of the battery cell.
- the battery cell includes two poles with opposite polarities, both poles are disposed on the bottom wall, and both poles are electrically connected to the electrode assembly.
- the battery cell is provided with two poles, and the two poles are both arranged on the bottom wall of the shell, thereby reducing the phenomenon that the force is transmitted to the shell and the end cover through the poles when the battery's busbar component pulls or twists the two poles with opposite polarities, so as to alleviate the pulling between the end cover and the shell, thereby further reducing the risk of connection failure between the end cover and the shell, and further alleviating the phenomenon of battery cell leakage due to connection failure or deformation between the end cover and the shell.
- an embodiment of the present application further provides a battery, comprising a box body and the above-mentioned battery cell; the battery cell is accommodated in the box body, and along the first direction, the bottom wall is arranged facing the bottom of the box body.
- the end cover is connected to the top of the box body so that the battery cell is suspended in the box body.
- the end cover of the battery cell is arranged to face the top of the box
- the bottom wall of the shell is arranged to face the bottom of the box
- the end cover of the battery cell is connected to the top of the box to realize the battery cell being suspended in the box.
- This structure can realize the spacing between the bottom wall with the pole and the bottom of the box, so as to facilitate the arrangement of a busbar component connected to the pole in the box, and can reduce the influence of other components on the end cover, so as to reduce the phenomenon of deformation of the end cover and resulting in connection failure between the end cover and the shell, which is beneficial to reduce the risk of leakage of the battery cell.
- an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery.
- FIG1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application.
- FIG2 is a cross-sectional view of a battery provided in some embodiments of the present application.
- FIG3 is a schematic diagram of the structure of a battery cell provided in some embodiments of the present application.
- FIG4 is an exploded view of the structure of a battery cell provided in some embodiments of the present application.
- FIG5 is a cross-sectional view of a battery cell provided in some embodiments of the present application.
- FIG6 is a partial enlarged view of the battery cell A shown in FIG5;
- FIG. 7 is a schematic structural diagram of a housing of a battery cell provided in some embodiments of the present application.
- FIG8 is a partial enlarged view of a portion B of the housing shown in FIG7 ;
- FIG9 is a cross-sectional view of a housing of a battery cell provided in some embodiments of the present application.
- FIG. 10 is a partial enlarged view of a portion C of the housing shown in FIG. 9 .
- Icon 1000-vehicle; 100-battery; 10-box; 11-first box body; 12-second box body; 20-battery cell; 21-shell; 211-bottom wall; 2111-lead hole; 2112-first surface; 2113-second surface; 2114-blocking part; 212-side wall; 213-opening; 214-accommodating chamber; 215-groove; 2151-first groove; 2151a-bottom surface of the first groove; 2152-second groove; 216-pressure relief part ; 2161- notched groove; 217- protrusion; 2171- outer peripheral surface of the protrusion; 2172- third surface; 22- end cap; 23- electrode assembly; 231- main body; 232- pole ear; 2321- first connecting section; 2322- second connecting section; 2323- third connecting section; 24- pole; 25- support member; 251- through hole; 26- current collecting member; 27- first insulating member; 200- controller; 300- motor; X- first direction; Y- second
- the terms “installed”, “connected”, “connected”, and “attached” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
- installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
- a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
- the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.
- the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, etc., and the embodiments of the present application do not limit this.
- the battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.
- Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.
- the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
- the battery mentioned in the present application may include a battery module or a battery pack.
- the battery generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
- the battery cell includes an electrode assembly and an electrolyte.
- the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator.
- the battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work.
- the positive electrode sheet includes a positive electrode collector and a positive electrode active material layer.
- the positive electrode active material layer is coated on the surface of the positive electrode collector. The part of the positive electrode collector that is not coated with the positive electrode active material layer serves as a positive electrode tab to realize the input or output of electric energy of the positive electrode sheet through the positive electrode tab.
- the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.
- the negative electrode sheet includes a negative electrode collector and a negative electrode active material layer.
- the negative electrode active material layer is coated on the surface of the negative electrode collector.
- the part of the negative electrode collector that is not coated with the negative electrode active material layer serves as a negative electrode tab to realize the input or output of electric energy of the negative electrode sheet through the negative electrode tab.
- the material of the negative electrode collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current can pass without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.
- the material of the isolation film may be polypropylene (PP) or polyethylene (PE), etc.
- the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.
- Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are an important part of the development of new energy today.
- the battery cell is usually assembled into an electrode assembly (bare cell) by winding or stacking the positive electrode sheet, the negative electrode sheet, and the isolation film, which is then loaded into the shell, covered with the end cover, and finally injected with electrolyte.
- electrode assembly bare cell
- the end caps of the battery cells are usually covered with the openings of the shells.
- poles are usually arranged on the end caps of the battery cells, so that when the end caps are covered with the shells, the poles can be first welded to the pole ears of the electrode assembly through the current collecting components arranged in the shells to achieve electrical connection between the poles and the electrode assembly, so that the poles are used as the output poles of the battery cells to achieve the input or output of electrical energy of the battery cells, and finally the end caps are connected to the shells.
- the battery cells in the battery are usually arranged inverted in the box, that is, the side of the battery cell with the pole is arranged facing the bottom of the box, and a busbar component is arranged between the battery cell and the bottom of the box.
- a busbar component is arranged between the battery cell and the bottom of the box.
- the force of the busbar component acting on the pole will be transmitted to the end cover through the pole, so as to cause a certain pulling or torsional effect on the end cover, thereby causing the end cover and the shell to easily suffer from connection failure such as weld cracking due to long-term fatigue stress, which in turn easily leads to a short service life of the battery cell and causes the battery cell to have safety hazards such as leakage, which is not conducive to use by consumers.
- the battery cell includes a shell, an end cover, an electrode assembly and a pole.
- the shell includes an integrally formed bottom wall and side wall, the side wall is arranged around the bottom wall, along a first direction, the bottom wall is arranged at one end of the side wall, and the other end of the side wall forms an opening.
- the end cover covers the opening, and the end cover and the bottom wall are arranged opposite to each other along the first direction.
- the electrode assembly is accommodated in the shell, and along the first direction, the bottom wall is configured to support the electrode assembly.
- the pole is arranged on the bottom wall, and the pole is electrically connected to the electrode assembly.
- the pole of the battery cell is arranged on a bottom wall of the shell that is arranged opposite to the end cover in the first direction, the bottom wall and the side wall are an integrated structure, and the bottom wall is used to support the electrode assembly, that is, the battery cell is inverted, so that the bottom wall of the battery cell with the pole is arranged downward, and the end cover of the electrode assembly is arranged upward.
- the battery cell adopting this structure can alleviate the phenomenon that the force is transmitted to the shell and the end cover through the pole when the battery's current collecting component pulls or twists the pole during use, so as to alleviate the pulling between the end cover and the shell, thereby effectively reducing the risk of connection failure between the end cover and the shell, which is beneficial to improving the safety of use and service life of the battery cell.
- the pole and the end cover are respectively located at the two ends of the battery cell in the first direction, and the end cover is located on the top of the battery cell, it can alleviate the phenomenon that the battery cell leaks when the connection between the end cover and the shell fails or deforms, thereby improving the safety of use of the battery cell.
- the battery cells disclosed in the embodiments of the present application can be used, but not limited to, in electrical devices such as vehicles, ships or aircraft.
- a power supply system comprising the battery cells and batteries disclosed in the present application can be used to form the electrical device, which is conducive to effectively alleviating the problems of leakage of the battery cells during use, thereby improving the service life and safety of the battery cells.
- the embodiment of the present application provides an electric device using a battery as a power source
- the electric 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 car, a ship, a spacecraft, etc.
- the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc.
- the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.
- FIG. 1 is a schematic diagram of the structure of a vehicle 1000 provided in 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.
- a battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided 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 be used as an operating power source for the vehicle 1000.
- the vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.
- the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
- FIG. 2 is a cross-sectional view of a battery 100 provided in some embodiments of the present application
- FIG. 3 is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of the present application.
- the battery 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is used to be accommodated in the box body 10.
- the box body 10 is used to provide an assembly space for the battery cell 20, and the box body 10 can adopt a variety of structures.
- the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cell 20.
- the first box body 11 may be a hollow structure with one end open, and the second box body 12 may be a plate-like structure, and the second box body 12 covers the open side of the first box body 11, so that the first box body 11 and the second box body 12 jointly define an assembly space; the first box body 11 and the second box body 12 may also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12.
- the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.
- the battery 100 there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection.
- a mixed connection means that the multiple battery cells 20 are both connected in series and in parallel.
- the multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10.
- the battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.
- Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
- the battery cell 20 may be cylindrical, flat, rectangular or other shapes. For example, in FIG3 , the battery cell 20 is a rectangular structure.
- FIG. 4 is a structural exploded view of a battery cell 20 provided in some embodiments of the present application
- FIG. 5 is a cross-sectional view of a battery cell 20 provided in some embodiments of the present application
- FIG. 6 is a partial enlarged view of A of the battery cell 20 shown in FIG. 5.
- the present application provides a battery cell 20, and the battery cell 20 includes a shell 21, an end cover 22, an electrode assembly 23 and a pole 24.
- the shell 21 includes an integrally formed bottom wall 211 and a side wall 212, and the side wall 212 is arranged around the bottom wall 211.
- the bottom wall 211 is arranged at one end of the side wall 212, and the other end of the side wall 212 forms an opening 213.
- the end cover 22 covers the opening 213, and the end cover 22 and the bottom wall 211 are arranged opposite to each other along the first direction X.
- the electrode assembly 23 is accommodated in the shell 21, and along the first direction X, the bottom wall 211 is configured to support the electrode assembly 23.
- the pole 24 is disposed on the bottom wall 211 , and the pole 24 is electrically connected to the electrode assembly 23 .
- the bottom wall 211 and the side wall 212 are integrally formed, that is, the shell 21 is made by an integral molding process, so that the bottom wall 211 and the side wall 212 are an integral structure.
- the shell 21 can be made by stamping, casting and other processes.
- the housing 21 can also be used to contain electrolytes, such as electrolytes.
- the housing 21 can be in various structural forms.
- the housing 21 can also be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.
- the bottom wall 211 is arranged at one end of the side wall 212, and the other end of the side wall 212 forms an opening 213, that is, a accommodating cavity 214 for accommodating the electrode assembly 23 is formed inside the shell 21, and the accommodating cavity 214 has an opening 213, that is, the shell 21 is a hollow structure with one end open in the first direction X, and the end cover 22 covers the opening 213 of the shell 21 and forms a sealed connection, so that the bottom wall 211 of the shell 21 and the end cover 22 are arranged opposite to each other along the first direction X to form a sealed space for accommodating the electrode assembly 23 and the electrolyte, that is, the bottom wall 211 is a wall of the shell 21 arranged opposite to the end cover 22 in the first direction X, that is, the first direction X is the thickness direction of the end cover 22, and also the thickness direction of the bottom wall 211.
- the electrode assembly 23 When assembling the battery cell 20 , the electrode assembly 23 may be placed in the housing 21 first, and the housing 21 may be filled with electrolyte, and then the end cap 22 may be closed on the opening 213 of the housing 21 .
- the shell 21 can be in various shapes, such as a cylinder, a cuboid, etc.
- the shape of the shell 21 can be determined according to the specific shape of the electrode assembly 23.
- the shell 21 can be a cylindrical structure; if the electrode assembly 23 is a cuboid structure, the shell 21 can be a cuboid structure.
- the end cap 22 can also be a variety of structures, such as the end cap 22 is a plate-like structure or a hollow structure with one end open.
- the shell 21 is a cuboid structure and the end cap 22 is a plate-like structure.
- the electrode assembly 23 is accommodated in the shell 21, that is, the electrode assembly 23 is accommodated in the accommodating cavity 214 formed by the bottom wall 211 and the side wall 212. It should be noted that the electrode assembly 23 is a component in the battery cell 20 where an electrochemical reaction occurs.
- the main body 231 of the electrode assembly 23 may include a positive electrode sheet, a negative electrode sheet and a separator.
- the main body 231 of the electrode assembly 23 may be a wound structure formed by winding a positive electrode sheet, a separator and a negative electrode sheet, or may be a stacked structure formed by stacking a positive electrode sheet, a separator and a negative electrode sheet.
- the electrode assembly 23 contained in the housing may be one or more.
- the electrode assemblies 23 contained in the housing may also be stacked in three, four, five or six layers.
- the bottom wall 211 is configured to support the electrode assembly 23. That is, as shown in Figure 2, the battery cell 20 is placed upside down in the box body 10, so that the bottom wall 211 can support the electrode assembly 23 in the first direction X, that is, one end of the battery cell 20 provided with the pole 24 is arranged toward the bottom of the box body 10 in the first direction X, and the end cover 22 of the battery cell 20 is arranged facing the top of the box body 10, or in actual use, one end of the battery cell 20 provided with the pole 24 is arranged toward the ground or downward, so that the first direction X is an up and down direction.
- the end cap 22 of the battery cell 20 is connected to the top of the box body 10 so that the battery cell 20 is inverted and suspended in the box body 10.
- the end cap 22 and the box body 10 can be connected in various ways, such as bonding, clamping, etc.
- the pole 24 is disposed on the bottom wall 211, and the pole 24 serves to connect the electrode assembly 23, so that the pole 24 can input or output the electric energy of the battery cell 20.
- the pole 24 can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.
- both poles 24 are mounted on the bottom wall 211 of the housing 21, and the two poles 24 are respectively used to output or input the positive electrode and the negative electrode of the battery cell 20.
- one pole 24 may be mounted on the bottom wall 211 of the housing 21, and the other pole 24 may be mounted on the side wall 212 of the housing 21.
- FIG. 4 is a schematic diagram of the structure of the housing 21 of the battery cell 20 provided in some embodiments of the present application.
- Two lead-out holes 2111 are provided on the bottom wall 211, and the lead-out holes 2111 are provided one-to-one with the poles 24.
- the lead-out holes 2111 penetrate both sides of the bottom wall 211, and the poles 24 are penetrated in the lead-out holes 2111 and installed on the bottom wall 211, so as to realize the input or output of the electric energy of the battery cell 20 through the poles 24.
- the pole 24 is insulated and installed on the bottom wall 211 , that is, the pole 24 and the bottom wall 211 are not electrically connected.
- the pole 24 of the battery cell 20 is arranged on the bottom wall 211 of the shell 21 opposite to the end cover 22 in the first direction X.
- the bottom wall 211 and the side wall 212 are an integrated structure, and the bottom wall 211 is used to support the electrode assembly 23, that is, the battery cell 20 is inverted, so that the bottom wall 211 of the battery cell 20 with the pole 24 is arranged downward, and the end cover 22 of the electrode assembly 23 is arranged upward.
- the battery cell 20 with this structure can, on the one hand, alleviate the pulling or twisting of the current collecting component of the battery 100 on the pole 24 during use, and transmit the force to the pole 24 through the pole 24.
- the phenomenon on the shell 21 and the end cover 22 can alleviate the pulling between the end cover 22 and the shell 21, thereby effectively reducing the risk of connection failure between the end cover 22 and the shell 21, which is beneficial to improving the safety of use and service life of the battery cell 20.
- the pole 24 and the end cover 22 are respectively located at the two ends of the battery cell 20 in the first direction X, and the end cover 22 is located at the top of the battery cell 20, the battery cell 20 can be alleviated from leaking when the connection between the end cover 22 and the shell 21 fails or is deformed, thereby improving the safety of use of the battery cell 20.
- the electrode assembly 23 includes a main body 231 and a tab 232 protruding from the main body 231 , and the tab 232 is electrically connected to the pole 24 .
- the battery cell 20 further includes a support member 25 , along the first direction X, at least a portion of the support member 25 is disposed between the bottom wall 211 and the main body 231 , and the bottom wall 211 supports the main body 231 through the support member 25 .
- the main body 231 is a component of the electrode assembly 23 for electrochemical reaction, and the tabs 232 play a role in outputting or inputting electric energy of the electrode assembly 23.
- the electrode assembly 23 has two tabs 232, which are respectively used to output or input the positive electrode and the negative electrode of the electrode assembly 23, and the two tabs 232 are respectively electrically connected to the two poles 24.
- At least part of the support member 25 is disposed between the bottom wall 211 and the main body 231, that is, in the first direction X, the support member 25 may be entirely located between the bottom wall 211 and the main body 231, or may be partially located between the bottom wall 211 and the main body 231. Exemplarily, in FIG5 , the support member 25 is entirely located between the bottom wall 211 and the main body 231.
- the bottom wall 211 supports the main body 231 through the support member 25, that is, the support member 25 is arranged between the bottom wall 211 and the main body 231 in the first direction X, so that the supporting force provided by the bottom wall 211 to the main body 231 is transmitted to the main body 231 through the support member 25, that is, the main body 231 is placed on the bottom wall 211 through the support member 25.
- the support member 25 is made of insulating material.
- the support member 25 may be made of plastic, rubber or silicone.
- the battery cell 20 is provided with a support member 25 located between the bottom wall 211 of the shell 21 and the main body 231 of the electrode assembly 23 in the first direction X, so that the bottom wall 211 can support the main body 231 of the electrode assembly 23 through the support member 25.
- the battery cell 20 adopting this structure can increase the force-bearing area of the main body 231 of the electrode assembly 23, which is beneficial to alleviate the phenomenon that the local stress of the main body 231 of the electrode assembly 23 is excessive due to the force on the local area, and thus can effectively reduce the risk of the main body 231 of the electrode assembly 23 being damaged during use, so as to improve the service life of the electrode assembly 23.
- the pole ear 232 protrudes from one end of the main body 231 facing the bottom wall 211 , and the pole ear 232 is bent around the support member 25 .
- the tab 232 protrudes from one end of the main body 231 facing the bottom wall 211 , that is, the tab 232 is connected to one end of the main body 231 in the first direction X close to the bottom wall 211 .
- the pole tab 232 is bent around the support member 25 , that is, in the first direction X, the pole tab 232 is bent around the support member 25 from the side of the support member 25 facing the main body 231 and connected to the pole 24 on the side of the support member 25 away from the main body 231 .
- the pole ear 232 By connecting the pole ear 232 to the end of the main body 231 facing the bottom wall 211 in the first direction X, and the pole ear 232 is bent around the support member 25 and then electrically connected to the pole post 24, so that the portion of the pole ear 232 connected to the pole post 24 is located on the side of the support member 25 away from the main body 231, the phenomenon of the pole ear 232 being upside down inserted into the main body 231 of the electrode assembly 23 during assembly or use can be effectively alleviated, which is beneficial to reduce the short circuit risk of the battery cell 20, thereby improving the safety of the battery cell 20.
- the pole ear 232 includes a first connecting segment 2321, a second connecting segment 2322, and a third connecting segment 2323 connected in sequence, the first connecting segment 2321 is connected to the main body 231, and the third connecting segment 2323 is connected to the pole 24.
- the first connecting segment 2321 is located on the side of the support member 25 facing the main body 231, and the third connecting segment 2323 is located on the side of the support member 25 facing the bottom wall 211.
- the second connecting segment 2322 is located at one end of the support member 25, and the second direction Y is perpendicular to the first direction X.
- the third connection section 2323 of the pole lug 232 abuts against a side of the support member 25 facing the bottom wall 211 , so that the third connection section 2323 is connected to the pole 24 .
- the second direction Y is a direction perpendicular to the first direction X, that is, the second direction Y is a direction perpendicular to the thickness direction of the bottom wall 211, and the second direction Y can be the length direction of the support member 25 or the width direction of the support member 25.
- the second direction Y is the width direction of the support member 25, that is, the second direction Y is the same as the thickness direction of the main body 231 of the electrode assembly 23.
- the pole lug 232 has a first connecting segment 2321, a second connecting segment 2322 and a third connecting segment 2323 which are connected in sequence, the first connecting segment 2321 and the third connecting segment 2323 are respectively located on both sides of the support member 25, the second connecting segment 2322 is located at one end of the support member 25 in the second direction Y, and the first connecting segment 2321 and the third connecting segment 2323 are respectively connected to the main body 231 and the pole 24 to realize a structure in which the pole lug 232 is bent around the support member 25, so that the pole lug 232 can be formed with a third connecting segment 2323 which is located on the side of the support member 25 facing the bottom wall 211 in the first direction X and is used to connect to the pole 24.
- the battery cell 20 includes two electrode assemblies 23, and the main bodies 231 of the two electrode assemblies 23 are stacked along the second direction Y, and the pole ears 232 of the two electrode assemblies 23 are respectively bent around the two ends of the support member 25, and the second direction Y is perpendicular to the first direction X.
- the main bodies 231 of the two electrode assemblies 23 are stacked along the second direction Y, that is, the main bodies 231 of the two electrode assemblies 23 are stacked along the thickness direction of the main bodies 231 .
- the pole ears 232 of the two electrode assemblies 23 are respectively bent around the two ends of the support member 25, that is, the pole ears 232 of the two electrode assemblies 23 are respectively bent from the two ends of the support member 25 in the second direction Y to the side of the support member 25 facing the bottom wall 211, that is, the second connecting sections 2322 of the pole ears 232 of the two electrode assemblies 23 are respectively located at the two ends of the support member 25 in the second direction Y, so that the second connecting sections 2322 of the pole ears 232 of the two electrode assemblies 23 are arranged facing each other in the second direction Y.
- the battery cell 20 is provided with two electrode assemblies 23 stacked along the second direction Y, and the pole ears 232 of the two electrode assemblies 23 are respectively bent around the two ends of the support member 25 in the second direction Y, so that the pole ears 232 of the two electrode assemblies 23 can be connected to the pole 24 after bypassing the support member 25, so as to alleviate the phenomenon that the pole ears 232 of the two electrode assemblies 23 are invertedly inserted into the main body 231 of the electrode assembly 23 during assembly or use, which is beneficial to further reduce the safety hazards of the battery cell 20 during use.
- the battery cell 20 further includes a current collecting member 26 , at least a portion of which is disposed between the support member 25 and the bottom wall 211 along the first direction X, and the current collecting member 26 connects the pole lug 232 and the pole column 24 .
- the current collecting member 26 is disposed between the support member 25 and the bottom wall 211, that is, in the first direction X, the current collecting member 26 may be entirely located between the bottom wall 211 and the support member 25, or may be partially located between the bottom wall 211 and the support member 25. Exemplarily, in FIG5 , the current collecting member 26 is entirely located between the bottom wall 211 and the support member 25.
- the current collecting member 26 connects the third connecting section 2323 of the pole tab 232 and the pole 24 to achieve electrical connection between the pole tab 232 and the pole 24.
- the current collecting member 26 can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.
- the current collecting components 26 are arranged in a one-to-one correspondence with the poles 24, that is, the third connecting segment 2323 of one pole ear 232 of the electrode assembly 23 is connected to one pole 24 through one current collecting component 26, and the third connecting segment 2323 of another pole ear 232 of the electrode assembly 23 is connected to another pole 24 through another current collecting component 26.
- the battery cell 20 is also provided with a current collecting component 26 located between the support member 25 and the bottom wall 211 in the first direction X, so that the current collecting component 26 can connect the pole ear 232 and the pole 24 to achieve electrical connection between the pole ear 232 and the pole 24.
- the use of this structure is beneficial to reducing the difficulty of connecting the pole ear 232 and the pole 24, so as to improve the production efficiency of the battery cell 20.
- the battery cell 20 further includes a first insulating member 27 , along the first direction X, at least a portion of the first insulating member 27 is disposed between the current collecting member 26 and the bottom wall 211 to insulate and isolate the current collecting member 26 and the bottom wall 211 .
- the first insulating member 27 is disposed between the current collecting member 26 and the bottom wall 211, that is, in the first direction X, the first insulating member 27 may be entirely located between the bottom wall 211 and the current collecting member 26, or may be partially located between the bottom wall 211 and the current collecting member 26. Exemplarily, in FIGS. 5 and 6 , the first insulating member 27 is partially located between the bottom wall 211 and the current collecting member 26.
- the first insulating member 27 serves to insulate and isolate the current collecting member 26 and the bottom wall 211 to reduce the risk of short circuit.
- the first insulating member 27 can be made of various materials, such as rubber, silicone or plastic.
- the battery cell 20 is also provided with a first insulating member 27 located between the current collecting member 26 and the bottom wall 211 in the first direction X.
- the first insulating member 27 can insulate and isolate the current collecting member 26 and the bottom wall 211 to reduce the risk of short circuit between the current collecting member 26 and the bottom wall 211, thereby helping to improve the safety of the battery cell 20 during use and reduce the risk of using the battery cell 20.
- FIG. 8 is a partial enlarged view of the B portion of the housing 21 shown in FIG. 7
- FIG. 9 is a cross-sectional view of the housing 21 of the battery cell 20 provided in some embodiments of the present application
- FIG. 10 is a partial enlarged view of the C portion of the housing 21 shown in FIG. 9.
- the bottom wall 211 has a first surface 2112 facing away from the electrode assembly 23, and the first surface 2112 is provided with a groove 215, and the groove bottom wall 211 of the groove 215 forms a pressure relief portion 216, and the pressure relief portion 216 is configured to release the internal pressure of the battery cell 20.
- the first surface 2112 is provided with a groove 215, and the bottom wall 211 of the groove 215 forms a pressure relief portion 216, that is, in the first direction X, the first surface 2112 of the bottom wall 211 is recessed in the direction facing the electrode assembly 23 to form a groove 215, and the bottom wall 211 of the groove 215 forms a pressure relief portion 216 for releasing the internal pressure of the battery cell 20, that is, the bottom wall 211 of the groove 215 can rupture when the battery cell 20 has thermal runaway to release the internal pressure of the battery cell 20.
- a notch groove 2161 is formed on the pressure relief portion 216, so that the pressure relief portion 216 forms a relatively weak structure in the area where the notch groove 2161 is provided, so that when the battery cell 20 has thermal runaway, the pressure relief portion 216 can be ruptured along the notch groove 2161 to release the internal pressure of the battery cell 20.
- the structure of the pressure relief portion 216 is not limited thereto, and in other embodiments, the pressure relief portion 216 can also be a structure with a partially thinned thickness, so that the pressure relief portion 216 forms a relatively weak structure in the area with the thinned thickness, so that when the battery cell 20 has thermal runaway, the pressure relief portion 216 can be ruptured along the area with the thinned thickness to release the internal pressure of the battery cell 20.
- the pressure relief portion 216 and the bottom wall 211 can be an integrated structure or a split structure. If the pressure relief portion 216 and the bottom wall 211 are an integrated structure, they can be made by stamping or extrusion molding; if the pressure relief portion 216 and the bottom wall 211 are a split structure, a mounting hole that penetrates the bottom wall 211 along the first direction X can be first provided on the bottom wall 211, and then the pressure relief portion 216 can be welded to the bottom wall 211 and the mounting hole can be blocked.
- a support member 25 is provided on a battery cell 20
- a plurality of through holes 251 are provided on the support member 25 at positions corresponding to the pressure relief portion 216 in the first direction X, and the through holes 251 penetrate both sides of the support member 25 along the first direction X.
- a support member 25 with such a structure can reduce the influence of the support member 25 on the pressure relief portion 216 when the battery cell 20 is relieved of pressure through the pressure relief portion 216, so as to ensure that the battery cell 20 can relieve pressure normally.
- a groove 215 recessed toward the interior of the battery cell 20 is provided on the first surface 2112 of the bottom wall 211, and a pressure relief portion 216 for releasing the internal pressure of the battery cell 20 is formed on the bottom wall 211 of the groove 215, so as to release the internal pressure of the battery cell 20 when the battery cell 20 is in thermal runaway.
- This structure enables the pressure relief portion 216 to be spaced apart from the first surface 2112 of the bottom wall 211, and to be closer to the electrode assembly 23 than the first surface 2112.
- the pressure relief portion 216 can be protected to a certain extent, so as to reduce the risk of the pressure relief portion 216 being worn or damaged by the external environment, thereby reducing the phenomenon of the pressure relief portion 216 opening prematurely.
- the phenomenon of the pressure relief portion 216 being blocked by other components and causing the pressure relief pressure required by the pressure relief portion 216 to increase can be alleviated, so as to ensure the normal use of the pressure relief portion 216, thereby facilitating the reduction of the potential safety hazards of the battery cell 20 during use.
- the distance between the pressure relief portion 216 and the first surface 2112 is H, satisfying 1 mm ⁇ H ⁇ 5 mm.
- the phenomenon that the protection effect of the pressure relief portion 216 is poor and it is easy to be blocked by other components due to the small distance between the pressure relief portion 216 and the first surface 2112 can be alleviated to ensure the normal use of the pressure relief portion 216.
- the phenomenon that the distance between the pressure relief portion 216 and the first surface 2112 is too large, resulting in excessive space occupation and greater processing difficulty can be alleviated.
- the bottom wall 211 has a second surface 2113 facing the electrode assembly 23, and the bottom wall 211 has a protrusion 217 formed at a position corresponding to the groove 215, and the protrusion 217 protrudes from the second surface 2113.
- the bottom wall 211 has a second surface 2113 facing the electrode assembly 23, that is, the bottom wall 211 has a second surface 2113 arranged opposite to the first surface 2112 in the first direction X, that is, the first surface 2112 is the outer surface of the bottom wall 211 away from the interior of the battery cell 20, and the second surface 2113 is the inner surface of the bottom wall 211 facing the interior of the battery cell 20.
- a protrusion 217 is formed on the bottom wall 211 at a position corresponding to the groove 215, and the protrusion 217 protrudes from the second surface 2113, that is, the bottom wall 211 is formed with a protrusion 217 in the area where the groove 215 is provided, which protrudes toward the inside of the battery cell 20, and the protrusion 217 extends out of the second surface 2113 in the first direction X, so that the pressure relief portion 216 can be connected to the bottom wall 211 through the protrusion 217.
- the pressure relief portion 216 protrudes from the second surface 2113 in a direction facing the electrode assembly 23.
- This structure is convenient for forming the groove 215 recessed in a direction facing the electrode assembly 23 on the bottom wall 211, and can also enhance the structural strength between the pressure relief portion 216 and the bottom wall 211.
- the groove 215 includes a first groove 2151 and a second groove 2152 continuously arranged along the first direction X, the first groove 2151 is arranged on the first surface 2112, and the groove side surface of the first groove 2151 is connected to the groove side surface of the second groove 2152 through the groove bottom surface 2151a of the first groove.
- the groove 215 includes a first groove 2151 and a second groove 2152 continuously arranged along the first direction X, that is, the groove 215 includes at least two continuously arranged groove sections, namely the first groove 2151 and the second groove 2152, and the first groove 2151 and the second groove 2152 are arranged along the first direction X.
- the first groove 2151 is disposed on the first surface 2112 , that is, the groove sidewall 212 of the first groove 2151 is connected to the first surface 2112 .
- the groove side surface of the first groove 2151 is connected to the groove side surface of the second groove 2152 through the groove bottom surface 2151a of the first groove, that is, the second groove 2152 is arranged on the groove bottom surface 2151a of the first groove, so that the groove side surface of the second groove 2152 is connected to the groove bottom surface 2151a of the first groove.
- the groove 215 is provided with a first groove 2151 and a second groove 2152 which are continuously arranged in the first direction X toward the direction facing the electrode assembly 23, and the groove side surface of the first groove 2151 is connected to the groove side surface of the second groove 2152 through the groove bottom surface 2151a of the first groove, that is, the second groove 2152 is arranged on the groove bottom surface 2151a of the first groove, so that a step structure is formed between the pressure relief part 216 and the bottom wall 211, which is beneficial to further improve the structural strength between the pressure relief part 216 and the bottom wall 211.
- the outer peripheral surface 2171 of the protrusion is arranged at an obtuse angle with the second surface 2113, and along the first direction X, the protrusion 217 has a third surface 2172 facing the electrode assembly 23, and the projection of the edge of the third surface 2172 in the first direction X is located within the groove bottom surface 2151a of the first groove.
- the outer circumferential surface 2171 of the protrusion is a surface in the circumferential direction of the protrusion 217 , that is, the outer circumferential surface 2171 of the protrusion is arranged around the protrusion 217 , and the outer circumferential surface 2171 of the protrusion is connected between the second surface 2113 and the third surface 2172 .
- the outer circumferential surface 2171 of the protrusion is set at an obtuse angle with the second surface 2113, that is, the outer circumferential surface 2171 of the protrusion is an inclined structure, so that the end of the outer circumferential surface 2171 of the protrusion connected to the second surface 2113 is farther away from the pressure relief portion 216 in the radial direction of the pressure relief portion 216 than the end of the outer circumferential surface 2171 of the protrusion connected to the third surface 2172, so that the second surface 2113 and the third surface 2172 are arranged in a spaced-apart structure in the radial direction of the pressure relief portion 216, so that after being connected by the outer circumferential surface 2171 of the protrusion, the outer circumferential surface 2171 of the protrusion is set at an obtuse angle with the second surface 2113.
- the radial direction of the pressure relief portion 216 is perpendicular to the first direction X, and the radial direction of the pressure relief portion 216 is the direction from the edge of the pressure relief portion 216 to the center of the pressure relief portion 216 or the center of the pressure relief portion 216 to the edge of the pressure relief portion 216.
- the projection of the edge of the third surface 2172 in the first direction X is located within the groove bottom surface 2151a of the first groove, that is, the projection of the intersection position of the third surface 2172 and the outer peripheral surface 2171 of the protrusion in the first direction X falls within the groove bottom surface 2151a of the first groove, that is, in the radial direction of the pressure relief portion 216 away from the pressure relief portion 216, the distance between the outer peripheral surface 2171 of the protrusion and the groove bottom surface 2151a of the first groove in the first direction X gradually decreases, so that the thickness of the protrusion 217 in the first direction X presents a gradually decreasing structure.
- the distance between the outer peripheral surface 2171 of the protrusion and the groove bottom surface 2151a of the first groove in the first direction X gradually decreases from the edge of the third surface 2172 to the second surface 2113, so that the thickness of the protrusion 217 in the first direction X gradually decreases, thereby achieving
- the protrusion 217 is formed with an area with relatively strong strength and an area with gradually decreasing strength, so as to realize a structure in which the area between the pressure relief portion 216 and the bottom wall 211 is from strong to weak.
- the groove bottom wall 211 of the second groove 2152 forms a pressure relief portion 216 .
- the groove bottom wall 211 of the second groove 2152 forms a pressure relief portion 216, that is, the groove 215 is only provided with a first groove 2151 and a second groove 2152 continuously arranged along the first direction X, the first groove 2151 is arranged on the first surface 2112, and the groove bottom wall 211 of the second groove 2152 is the pressure relief portion 216.
- the groove 215 may also include a first groove 2151, a second groove 2152, a third groove or a fourth groove, etc., which are continuously arranged along the first direction X.
- the groove 215 is only provided with the first groove 2151 and the second groove 2152. This structure facilitates the processing of the bottom wall 211 and helps to reduce the processing difficulty.
- a blocking portion 2114 is protruded from the first surface 2112 , and the blocking portion 2114 surrounds the outer side of the groove 215 .
- the blocking portion 2114 surrounds the outer side of the groove 215 , that is, the blocking portion 2114 is an annular structure disposed around the outer side of the groove 215 , so that the blocking portion 2114 is disposed around the groove 215 .
- the battery cell 20 with this structure can block the electrolyte through the blocking portion 2114 during the assembly process of the battery cell 20, so as to reduce the phenomenon of the electrolyte flowing from the first surface 2112 into the groove 215, thereby reducing the influence of the electrolyte on the pressure relief portion 216.
- the thickness of the bottom wall 211 is greater than the thickness of the side wall 212. That is, the thickness of the bottom wall 211 in the first direction X is greater than the thickness of the side wall 212 in the second direction Y.
- the thickness of the bottom wall 211 By setting the thickness of the bottom wall 211 to be greater than the thickness of the side wall 212, the structural strength of the bottom wall 211 is improved, thereby ensuring the structural stability of the pole 24 installed on the bottom wall 211, and improving the bearing capacity of the bottom wall 211 for the electrode assembly 23, thereby alleviating the deformation of the bottom wall 211 during use.
- the thickness of the bottom wall 211 may also be set equal to the thickness of the side wall 212. That is, the thickness of the bottom wall 211 in the first direction X is equal to the thickness of the side wall 212 in the second direction Y.
- the bottom wall 211 and the side wall 212 of the integrated structure can be directly formed by a process such as stamping, without adding other processing techniques, which helps to reduce the manufacturing difficulty of the shell 21 .
- the thickness of the side wall 212 is greater than the thickness of the end cap 22.
- the thickness of the side wall 212 in the second direction Y is greater than the thickness of the end cap 22 in the first direction X.
- the thickness of the side wall 212 is greater than the thickness of the end cover 22 , since components such as the pole 24 are not provided on the end cover 22 , it is helpful to reduce the space occupied by the end cover 22 , thereby improving the energy density and capacity of the battery cell 20 .
- the battery cell 20 includes two poles 24 with opposite polarities, both poles 24 are disposed on the bottom wall 211 , and both poles 24 are electrically connected to the electrode assembly 23 .
- the two poles 24 are both insulated and installed on the bottom wall 211 , so that the two poles 24 are not electrically connected to the bottom wall 211 .
- the two poles 24 are both electrically connected to the electrode assembly 23 , that is, the two poles 24 are respectively connected to two pole ears 232 of the electrode assembly 23 with opposite polarities.
- the battery cell 20 is provided with two poles 24, and the two poles 24 are both arranged on the bottom wall 211 of the shell 21, thereby reducing the phenomenon that the force is transmitted to the shell 21 and the end cover 22 through the poles 24 when the current collecting component of the battery 100 pulls or twists the two poles 24 with opposite polarities, so as to alleviate the pulling between the end cover 22 and the shell 21, thereby further reducing the risk of connection failure between the end cover 22 and the shell 21, and further alleviating the phenomenon of leakage of the battery cell 20 due to connection failure or deformation between the end cover 22 and the shell 21.
- the present application further provides a battery 100, comprising a box 10 and a battery cell 20 of any of the above solutions.
- the battery cell 20 is accommodated in the box 10, and along the first direction X, the bottom wall 211 is arranged facing the bottom of the box 10.
- the bottom wall 211 is arranged facing the bottom of the box body 10, that is, the end of the battery cell 20 provided with the pole 24 is closer to the bottom of the box body 10 than the end cover 22 in the first direction X, that is, the end of the battery cell 20 provided with the pole 24 is arranged downward.
- the number of battery cells 20 disposed in the box body 10 may be one or more.
- the number of battery cells 20 disposed in the box body 10 may be one or more.
- the end cover 22 is connected to the top of the box body 10 so that the battery cell 20 is suspended in the box body 10 .
- the end cover 22 is connected to the top of the box body 10 so that the battery cell 20 is suspended in the box body 10, that is, one end of the battery cell 20 provided with the end cover 22 in the first direction X is connected to the top of the box body 10, so that the end of the battery cell 20 provided with the pole 24 in the first direction X is spaced apart from the bottom of the box body 10, so that the battery cell 20 is suspended in the box body 10.
- the end cover 22 may be connected to the top of the box body 10 in various ways, such as bonding, snap-fitting, etc.
- the battery cell 20 can be suspended in the box body 10.
- This structure can realize that the bottom wall 211 provided with the pole 24 is spaced apart from the bottom of the box body 10, so as to facilitate the arrangement of a busbar component connected to the pole 24 in the box body 10, and can reduce the influence of other components on the end cover 22, so as to reduce the phenomenon of deformation of the end cover 22 causing connection failure between the end cover 22 and the shell body 21, which is beneficial to reduce the risk of leakage of the battery cell 20.
- the present application further provides an electrical device, comprising a battery 100 according to any of the above schemes, and the battery 100 is used to provide electrical energy to the electrical device.
- the power-consuming device may be any of the aforementioned devices or systems using the battery 100 .
- the present application provides a battery cell 20, which includes a housing 21, an end cover 22, an electrode assembly 23, a pole 24, a support 25, a current collecting member 26 and a first insulating member 27.
- the housing 21 includes an integrally formed bottom wall 211 and a side wall 212, the side wall 212 is arranged around the bottom wall 211, along the first direction X, the bottom wall 211 is arranged at one end of the side wall 212, the other end of the side wall 212 forms an opening 213, and the pole 24 is insulated and installed on the bottom wall 211.
- the end cover 22 covers the opening 213, and the end cover 22 and the bottom wall 211 are arranged opposite to each other along the first direction X.
- the electrode assembly 23 is accommodated in the housing 21, and the electrode assembly 23 includes a main body 231 and a pole ear 232, along the first direction X, the pole ear 232 protrudes from one end of the main body 231 facing the bottom wall 211, and the pole ear 232 is used to connect with the pole 24.
- the support member 25 is disposed between the bottom wall 211 and the main body 231, and the bottom wall 211 supports the main body 231 through the support member 25.
- the pole tab 232 is bent around the support member 25, and the pole tab 232 includes a first connecting section 2321, a second connecting section 2322, and a third connecting section 2323 connected in sequence, the first connecting section 2321 is connected to the main body 231, and the third connecting section 2323 is connected to the pole 24.
- the first connecting section 2321 is located on the side of the support member 25 facing the main body 231, and the third connecting section 2323 is located on the side of the support member 25 facing the bottom wall 211.
- the second connecting section 2322 is located at one end of the support member 25, and the second direction Y is perpendicular to the first direction X.
- the current collecting member 26 is disposed between the support member 25 and the bottom wall 211, and the current collecting member 26 connects the third connecting section 2323 and the pole 24.
- the first insulating member 27 is disposed between the current collecting member 26 and the bottom wall 211 to insulate and isolate the current collecting member 26 from the bottom wall 211 .
- the bottom wall 211 has a first surface 2112 away from the electrode assembly 23, the first surface 2112 is provided with a groove 215, the bottom wall 211 has a second surface 2113 facing the electrode assembly 23, and the bottom wall 211 is formed with a protrusion 217 at a position corresponding to the groove 215, and the protrusion 217 protrudes from the second surface 2113.
- the groove 215 includes a first groove 2151 and a second groove 2152 that are continuously arranged along the first direction X, the first groove 2151 is arranged on the first surface 2112, the groove side surface of the first groove 2151 is connected with the groove side surface of the second groove 2152 through the groove bottom surface 2151a of the first groove, and the groove bottom wall 211 of the second groove 2152 forms a pressure relief portion 216, and the pressure relief portion 216 is configured to release the internal pressure of the battery cell 20.
- the outer peripheral surface 2171 of the protrusion is set at an obtuse angle to the second surface 2113.
- the protrusion 217 has a third surface 2172 facing the electrode assembly 23, and the projection of the edge of the third surface 2172 in the first direction X is located within the bottom surface 2151a of the first groove.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Cell Separators (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (21)
- 一种电池单体,包括:壳体,包括一体成型的底壁和侧壁,所述侧壁围设于所述底壁的周围,沿第一方向,所述底壁设置于所述侧壁的一端,所述侧壁的另一端形成开口;端盖,盖合于所述开口,所述端盖与所述底壁沿所述第一方向相对设置;电极组件,容纳于所述壳体内,沿所述第一方向,所述底壁被配置为支撑所述电极组件;以及极柱,设置于所述底壁上,所述极柱与所述电极组件电连接。
- 根据权利要求1所述的电池单体,其中,所述电极组件包括主体部和凸出于所述主体部上的极耳,所述极耳与所述极柱电连接;所述电池单体还包括支撑件,沿所述第一方向,所述支撑件的至少部分设置于所述底壁和主体部之间,所述底壁通过所述支撑件支撑所述主体部。
- 根据权利要求2所述的电池单体,其中,沿所述第一方向,所述极耳凸出于所述主体部面向所述底壁的一端,所述极耳绕着所述支撑件弯折。
- 根据权利要求3所述的电池单体,其中,所述极耳包括依次连接的第一连接段、第二连接段和第三连接段,所述第一连接段连接于所述主体部,所述第三连接段连接于所述极柱;沿所述第一方向,所述第一连接段位于所述支撑件面向所述主体部的一侧,所述第三连接段位于所述支撑件面向所述底壁的一侧;沿第二方向,所述第二连接段位于所述支撑件的一端,所述第二方向垂直于所述第一方向。
- 根据权利要求3或4所述的电池单体,其中,所述电池单体包括:两个所述电极组件,沿第二方向,两个所述电极组件的所述主体部沿第二方向层叠设置,且两个所述电极组件的所述极耳分别绕所述支撑件的两端弯折,所述第二方向垂直于所述第一方向。
- 根据权利要求3-5任一项所述的电池单体,其中,所述电池单体还包括:集流构件,沿所述第一方向,所述集流构件的至少部分设置于所述支撑件与所述底壁之间,所述集流构件连接所述极耳和所述极柱。
- 根据权利要求6所述的电池单体,其中,所述电池单体还包括:第一绝缘件,沿所述第一方向,所述第一绝缘件的至少部分设置于所述集流构件与所述底壁之间,以绝缘隔离所述集流构件和所述底壁。
- 根据权利要求1-7任一项所述的电池单体,其中,沿所述第一方向,所述底壁具有背离所述电极组件的第一表面,所述第一表面设置有凹槽,所述凹槽的槽底壁形成泄压部,所述泄压部被配置为泄放所述电池单体的内部压力。
- 根据权利要求8所述的电池单体,其中,沿所述第一方向,所述泄压部与所述第一表面之间的距离为H,满足,1mm≤H≤5mm。
- 根据权利要求8或9所述的电池单体,其中,沿所述第一方向,所述底壁具有面向所述电极组件的第二表面,所述底壁在与所述凹槽对应的位置形成有凸出部,所述凸出部凸出于所述第二表面。
- 根据权利要求10所述的电池单体,其中,所述凹槽包括沿所述第一方向连续设置的第一槽和第二槽,所述第一槽设置于所述第一表面,所述第一槽的槽侧面与所述第二槽的槽侧面通过所述第一槽的槽底面连接。
- 根据权利要求11所述的电池单体,其中,所述凸出部的外周面与第二表面呈钝角设置,沿所述第一方向,所述凸出部具有面向所述电极组件的第三表面,所述第三表面的边缘在所述第一方向上的投影位于所述第一槽的槽底面内。
- 根据权利要求11或12所述的电池单体,其中,所述第二槽的槽底壁形成所述泄压部。
- 根据权利要求8-13任一项所述的电池单体,其中,所述第一表面凸设有阻挡部,所述阻挡部环绕于所述凹槽的外侧。
- 根据权利要求1-14任一项所述的电池单体,其中,所述底壁的厚度大于所述侧壁的厚度。
- 根据权利要求1-14任一项所述的电池单体,其中,所述底壁的厚度等于所述侧壁的厚度。
- 根据权利要求1-16任一项所述的电池单体,其中,所述侧壁的厚度大于所述端盖的厚度。
- 根据权利要求1-17任一项所述的电池单体,其中,所述电池单体包括极性相反的两个所述极柱,两个所述极柱均设置于所述底壁上,且两个所述极柱均与所述电极组件电连接。
- 一种电池,包括:箱体;以及如权利要求1-18任一项所述的电池单体,所述电池单体容纳于所述箱体内,沿所述第一方向,所述底壁面向所述箱体的底部设置。
- 根据权利要求19所述的电池,其中,沿所述第一方向,所述端盖连接于所述箱体的顶部,以使所述电池单体悬挂于所述箱体内。
- 一种用电装置,包括如权利要求19或20所述的电池。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2022/130664 WO2024098257A1 (zh) | 2022-11-08 | 2022-11-08 | 电池单体、电池及用电装置 |
| EP22964732.6A EP4510256A4 (en) | 2022-11-08 | 2022-11-08 | BATTERY COMPONENT, BATTERY AND ELECTRICAL APPLIANCE |
| JP2024556476A JP2025518416A (ja) | 2022-11-08 | 2022-11-08 | 電池セル、電池及び電力消費装置 |
| CN202280093491.1A CN118922971A (zh) | 2022-11-08 | 2022-11-08 | 电池单体、电池及用电装置 |
| KR1020247037696A KR20250003806A (ko) | 2022-11-08 | 2022-11-08 | 전지셀, 전지 및 전기기기 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2022/130664 WO2024098257A1 (zh) | 2022-11-08 | 2022-11-08 | 电池单体、电池及用电装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024098257A1 true WO2024098257A1 (zh) | 2024-05-16 |
Family
ID=91031770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2022/130664 Ceased WO2024098257A1 (zh) | 2022-11-08 | 2022-11-08 | 电池单体、电池及用电装置 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4510256A4 (zh) |
| JP (1) | JP2025518416A (zh) |
| KR (1) | KR20250003806A (zh) |
| CN (1) | CN118922971A (zh) |
| WO (1) | WO2024098257A1 (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119742512A (zh) * | 2024-12-25 | 2025-04-01 | 蜂巢能源科技股份有限公司 | 电芯盖板组件、电芯及电池包 |
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| CN101257097A (zh) * | 2007-03-02 | 2008-09-03 | 深圳市比克电池有限公司 | 一种改进的电池封口组件及电池 |
| JP2015056357A (ja) * | 2013-09-13 | 2015-03-23 | 株式会社豊田自動織機 | 蓄電装置 |
| CN217035800U (zh) * | 2022-03-28 | 2022-07-22 | 蓝京新能源(嘉兴)有限公司 | 一种多极耳圆柱电池 |
| CN217158556U (zh) * | 2022-04-29 | 2022-08-09 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电设备 |
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| JP5198723B2 (ja) * | 2005-06-13 | 2013-05-15 | 冨士発條株式会社 | 密閉型電池用封口板 |
| JP5208548B2 (ja) * | 2008-03-24 | 2013-06-12 | 株式会社東芝 | バッテリパック、バッテリパックの梱包方法および組立て方法 |
| JP2015103308A (ja) * | 2013-11-21 | 2015-06-04 | 株式会社豊田自動織機 | 密閉型電池の製造方法および密閉型電池 |
| KR102273643B1 (ko) * | 2014-10-07 | 2021-07-07 | 삼성에스디아이 주식회사 | 이차 전지 |
| KR102357319B1 (ko) * | 2017-02-10 | 2022-01-27 | 삼성에스디아이 주식회사 | 이차 전지 |
| CN114865245B (zh) * | 2019-11-25 | 2024-01-02 | 宁德时代新能源科技股份有限公司 | 电池单体、电池模块、电池组、使用电池单体作为电源的装置及电池单体的组装方法 |
| WO2022006894A1 (zh) * | 2020-07-10 | 2022-01-13 | 宁德时代新能源科技股份有限公司 | 电池及其相关装置、制备方法和制备设备 |
| JP7296923B2 (ja) * | 2020-08-12 | 2023-06-23 | プライムプラネットエナジー&ソリューションズ株式会社 | 角型電池 |
| CN216213942U (zh) * | 2021-09-30 | 2022-04-05 | 宁德时代新能源科技股份有限公司 | 电池单体、电池以及用电装置 |
| CN216903143U (zh) * | 2022-01-28 | 2022-07-05 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电装置 |
-
2022
- 2022-11-08 JP JP2024556476A patent/JP2025518416A/ja active Pending
- 2022-11-08 KR KR1020247037696A patent/KR20250003806A/ko active Pending
- 2022-11-08 WO PCT/CN2022/130664 patent/WO2024098257A1/zh not_active Ceased
- 2022-11-08 CN CN202280093491.1A patent/CN118922971A/zh active Pending
- 2022-11-08 EP EP22964732.6A patent/EP4510256A4/en active Pending
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| CN101257097A (zh) * | 2007-03-02 | 2008-09-03 | 深圳市比克电池有限公司 | 一种改进的电池封口组件及电池 |
| JP2015056357A (ja) * | 2013-09-13 | 2015-03-23 | 株式会社豊田自動織機 | 蓄電装置 |
| CN217035800U (zh) * | 2022-03-28 | 2022-07-22 | 蓝京新能源(嘉兴)有限公司 | 一种多极耳圆柱电池 |
| CN217158556U (zh) * | 2022-04-29 | 2022-08-09 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电设备 |
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| CN119742512A (zh) * | 2024-12-25 | 2025-04-01 | 蜂巢能源科技股份有限公司 | 电芯盖板组件、电芯及电池包 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4510256A4 (en) | 2025-11-19 |
| EP4510256A1 (en) | 2025-02-19 |
| JP2025518416A (ja) | 2025-06-16 |
| KR20250003806A (ko) | 2025-01-07 |
| CN118922971A (zh) | 2024-11-08 |
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