WO2025112347A1 - 电池单体、电池和用电设备 - Google Patents
电池单体、电池和用电设备 Download PDFInfo
- Publication number
- WO2025112347A1 WO2025112347A1 PCT/CN2024/094614 CN2024094614W WO2025112347A1 WO 2025112347 A1 WO2025112347 A1 WO 2025112347A1 CN 2024094614 W CN2024094614 W CN 2024094614W WO 2025112347 A1 WO2025112347 A1 WO 2025112347A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- segment
- battery cell
- pressure relief
- relief notch
- straight line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/143—Fireproof; Explosion-proof
-
- 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
-
- 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
-
- 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.
- Batteries are widely used in portable electronic devices, electric vehicles, electric tools, drones, energy storage devices and other fields.
- the manufacturing cost of batteries is an issue that cannot be ignored. Therefore, how to reduce the manufacturing cost of batteries is a technical problem that needs to be solved urgently in battery technology.
- the present application provides a battery cell, a battery and an electrical device, wherein the pressure relief notch is arranged on a large surface, so that the processing of the pressure relief notch is easier and the manufacturing cost of the battery can be reduced.
- an embodiment of the present application provides a battery cell, including a shell and a pressure relief notch, wherein the shell is flat and includes two first walls opposite to each other along the thickness direction of the shell; the pressure relief notch is arranged on at least one of the first walls.
- the outer shell is flat.
- the area enclosed by the pressure relief score is not restricted, and the area enclosed by the pressure relief score and the setting position of the pressure relief score can be freely selected.
- the outer surface area of the first wall is larger, the processing of the pressure relief score is easier and the manufacturing cost is reduced.
- the pressure relief notch is a closed annular structure.
- the structural strength of the portion of the housing provided with the pressure relief notch is more uniform, and when thermal runaway occurs in the battery cell, its ability to withstand high temperature and high pressure is also improved.
- the pressure relief notch is an unclosed annular structure.
- the crack can tear along the extension direction of the pressure relief notch, and due to the presence of the opening, the crack can tear the shell along the direction of the opening, so that the tearing direction and tearing range of the crack can be controlled, and the partial valve opening is achieved, reducing the probability of large-scale tearing of the shell.
- the tearing direction and tearing range of the crack are both controllable, reducing the damage to the battery cell caused by the uncontrollable crack, and also reducing the disorderly discharge of high-pressure gas due to the uncontrollable crack and the impact on other battery cells.
- the pressure relief notch is located in the central area of the first wall.
- the area surrounded by the pressure relief notch can be selected as needed.
- setting the pressure relief notch in the central position of the first wall can make processing easier and reduce the processing cost of the pressure relief notch.
- the pressure relief notch is arranged at the corner area of the first wall.
- the area enclosed by the pressure relief notch will not be limited.
- the crack will tear the first wall along the pressure relief notch. Since the pressure relief notch is arranged at the corner area of the first wall, the crack can only damage the corner area of the first wall, reducing the probability of the crack damaging a large area of the first wall.
- the pressure relief notch includes an arc segment, a first extension segment, and a second extension segment.
- the arc segment has a first end and a second end.
- the first extension segment extends from the first end toward a direction close to the central axis of the arc segment.
- the second extension segment extends from the second end toward a direction close to the central axis of the arc segment.
- the center angle of the arc segment is ⁇ , which satisfies: 180° ⁇ 360°.
- ⁇ 180° the area enclosed by the arc segment is sufficient, so that when the battery cell has thermal runaway, the crack tears the shell along the arc segment, and the crack on the arc segment can quickly discharge the high-pressure gas in the shell;
- the pressure relief notch is an unclosed annular structure, and the pressure relief notch has an opening, so that the crack can tear the shell along the direction of the opening, so that the tearing direction and tearing range of the crack can be controlled, thereby realizing the partial opening of the crack on the shell.
- the crack range torn along the arc segment can be sufficient, the high-pressure gas in the shell can be quickly discharged, and at the same time, the pressure relief notch has an opening, which can guide the tearing direction and tearing range of the crack, and realize the partial opening of the crack on the shell.
- the first extension segment is tangent to the arc segment; and/or the second extension segment is tangent to the arc segment.
- the crack on the arc segment can be extended and torn very smoothly along the tangent at the first end or the tangent at the second end of the arc segment, reducing the obstacles in the crack tearing process, making the crack tearing smoother and more controllable, and reducing the stress concentration in the tearing process.
- the first extension segment is a straight segment; and/or the second extension segment is a straight segment.
- the processing of the first extension segment and/or the second extension segment can be easier, and on the other hand, the tearing process of the crack on the straight segment is smoother, or in other words, the straight segment can better guide the crack to tear along a preset direction, so that the tearing direction and tearing range of the crack are more controllable.
- the end of the first extension section away from the arc section and the end of the second extension section away from the arc section are spaced apart to form a first opening.
- the orientation of the first opening directly affects the tearing direction of the crack. For example, if the first opening is toward the corner of the first wall, then after the thermal runaway of the battery cell, the high-pressure gas will tear the pressure relief notch, and the crack can be torn along the direction of the first opening toward the corner, so that the tearing direction of the crack can be adjusted by adjusting the orientation of the first opening.
- the pressure relief notch is arranged at the corner area of the first wall and the first opening faces the corner area of the first wall.
- the crack can tear the shell under the guidance of the pressure relief notch. Since the pressure relief notch is arranged at the corner area of the first wall, the tearing area of the crack is also mainly concentrated in the corner area of the first wall, thereby reducing the probability of the crack damaging other areas of the first wall, making it possible to recycle the shell of the battery cell after thermal runaway occurs.
- the pressure relief mark includes: a first arc segment and a second arc segment, the first arc segment and the second arc segment are spaced apart in a first direction, and the first arc segment and the second arc segment protrude in a direction away from each other; a first straight line segment and a second straight line segment, the first straight line segment is connected to one end of the first arc segment and the second arc segment in the same direction in the second direction, and the second straight line segment is connected to the other end of the first arc segment and the second arc segment in the same direction in the second direction, and the first direction and the second direction are perpendicular to each other.
- the first arc segment, the first straight segment, the second arc segment and the second straight segment form a runway-shaped structure, and the first arc segment, the first straight segment, the second arc segment and the second straight segment can be sequentially etched by laser.
- the length of the first straight line segment or the second straight line segment is L1, which satisfies: 1mm ⁇ L1 ⁇ 40mm.
- L1 ⁇ 1mm after the battery cell has thermal runaway, the high-temperature and high-pressure gas in the shell can be quickly discharged after the crack tears the shell along the pressure relief notch, and when L1 ⁇ 40mm, the overall size of the pressure relief notch will not be too large, so that the overall structural strength of the shell meets the requirements.
- 1mm ⁇ L1 ⁇ 40mm the gas in the shell can be quickly discharged after the battery cell has thermal runaway, and the overall structural strength of the shell also meets the requirements.
- the following is satisfied: 5mm ⁇ L1 ⁇ 30mm.
- L1 ⁇ 5mm after thermal runaway occurs in the battery cell, the high-temperature and high-pressure gas in the shell can be discharged more quickly after the crack tears the shell along the pressure relief notch.
- L1 ⁇ 30mm the overall size of the pressure relief notch will not be too large, so that the overall structural strength of the shell can further meet the requirements.
- 5mm ⁇ L1 ⁇ 30mm the gas in the shell can be discharged more quickly after thermal runaway occurs in the battery cell, and the overall structural strength of the shell can also further meet the requirements.
- the distance between the first straight line segment and the second straight line segment is The distance is W1, which satisfies: 1mm ⁇ W1 ⁇ 40mm.
- W1 ⁇ 1mm after the battery cell has thermal runaway, the crack tears the shell along the pressure relief notch, and the high-temperature and high-pressure gas in the shell can be quickly discharged.
- W1 ⁇ 40mm the overall size of the pressure relief notch will not be too large, so that the overall structural strength of the shell meets the requirements.
- 1mm ⁇ W1 ⁇ 40mm the gas in the shell can be quickly discharged after the battery cell has thermal runaway, and the overall structural strength of the shell also meets the requirements.
- the following is satisfied: 1mm ⁇ W1 ⁇ 10mm.
- W1 ⁇ 1mm when W1 ⁇ 1mm, after the battery cell undergoes thermal runaway, the crack tears the outer shell along the pressure relief notch, and the high-temperature and high-pressure gas in the outer shell can be quickly discharged.
- W1 ⁇ 10mm the overall size of the pressure relief notch will not be too large, so that the overall structural strength of the outer shell further meets the requirements.
- 1mm ⁇ W1 ⁇ 10mm the gas in the outer shell can be quickly discharged after the battery cell undergoes thermal runaway, and the overall structural strength of the outer shell further meets the requirements.
- the first straight line segment includes a first subsegment and a second subsegment, one end of the first subsegment is connected to the first arc segment, one end of the second subsegment is connected to the second arc segment, and the other end of the first subsegment and the other end of the second subsegment are spaced apart to form a second opening.
- the gas can tear the outer shell along the pressure relief notch, and at the same time, the area where the second opening is located will not be disconnected from the outer shell, but will guide the gas to continue tearing the outer shell until the desired tearing effect is achieved.
- the second opening can guide the tearing direction of the crack, so that the tearing direction and tearing range of the crack are controllable.
- the length of the pressure relief notch is L
- the distance between the first sub-segment and the second sub-segment in the first direction is L2, satisfying: 0.05 ⁇ L2/L ⁇ 0.8.
- L2/L ⁇ 0.05 the second opening guides the crack to tear the outer shell, so that after the battery cell has thermal runaway, the gas in the outer shell can be quickly discharged;
- L2/L ⁇ 0.8 when the crack tears the outer shell along the direction of the second opening, the tearing range will not be too large, reducing the probability of large-scale damage to the outer shell.
- the gas in the outer shell can be quickly discharged to the outside after the battery cell has thermal runaway, while also reducing the probability of large-scale damage to the outer shell.
- the following is satisfied: 0.05 ⁇ L2/L ⁇ 0.4.
- the second opening guides the crack to tear the outer shell, so that after the battery cell has thermal runaway, the gas in the outer shell can be quickly discharged;
- L2/L ⁇ 0.4 when the crack tears the outer shell along the direction of the second opening, the tearing range will not be too large, further reducing the probability of large-scale damage to the outer shell.
- the gas in the outer shell can be quickly discharged to the outside after the battery cell has thermal runaway, while also further reducing the probability of large-scale damage to the outer shell.
- the housing includes a shell and a cover plate
- the shell includes a bottom wall and a peripheral side wall, one end of the peripheral side wall is connected to the outer peripheral edge of the bottom wall, the other end of the peripheral side wall forms an opening, and the cover plate closes the opening; wherein the first wall is the cover plate or the bottom wall.
- the housing is formed by two separate parts - the shell and the cover plate, the shell and the cover plate can be metal parts, and the two can be fixed together by welding.
- an embodiment of the present application provides a battery, comprising the above-mentioned battery cell. Since the battery according to the embodiment of the present application is provided with the above-mentioned battery cell, the processing of the battery is easier and the manufacturing cost is reduced.
- an embodiment of the present application provides an electrical device, comprising the above-mentioned battery cell or the above-mentioned battery, wherein the battery cell or the battery is used to provide electrical energy, thereby reducing the manufacturing difficulty and processing cost of the electrical device.
- FIG1 is a schematic diagram of a vehicle provided in an embodiment of the present application.
- FIG2 is an exploded view of a battery provided in an embodiment of the present application.
- FIG3 is an exploded view of a battery cell provided in an embodiment of the present application.
- FIG4 is a schematic diagram of a first wall provided in an embodiment of the present application.
- FIG5 is a partial enlarged schematic diagram of circle A in FIG4 ;
- FIG6 is a schematic diagram of another first wall provided in an embodiment of the present application.
- FIG7 is a schematic diagram of another first wall provided in an embodiment of the present application.
- FIG8 is a partial enlarged schematic diagram of circle B in FIG7 ;
- FIG. 9 is a schematic diagram of yet another first wall provided in an embodiment of the present application.
- Icons vehicle 1000, battery 100, controller 200, motor 300, housing 10, battery cell 20, first sub-housing 11, second sub-housing 12, housing 21, electrode assembly 22, electrode terminal 25, housing 211, bottom wall 211a, peripheral side wall 211b, cover plate 212, first wall 212a, first edge 212a1, second edge 212a2, Pressure relief notch 213, arc segment 201, first extension segment 202, second extension segment 203, central axis 201a, first opening 201c, first arc segment 204, second arc segment 205, first straight segment 206, second straight segment 207, first sub-segment 206a, second sub-segment 206b, second opening 208.
- 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.
- multiple refers to more than two (including two).
- multiple groups refers to more than two groups (including two groups)
- multiple sheets refers to more than two sheets (including two sheets).
- the battery may be a battery module.
- the multiple battery cells are arranged and fixed to form a battery module.
- the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.
- the box body can be used as a part of the chassis structure of the vehicle.
- part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.
- the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.
- the battery cell may be a secondary battery.
- a secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.
- the battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.
- a battery cell generally includes an electrode assembly.
- the electrode assembly includes a positive electrode, a negative electrode, and a separator.
- active ions such as lithium ions
- the separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.
- the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.
- the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.
- the positive electrode current collector may be a metal foil or a composite current collector.
- the metal foil aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc.
- the composite current collector may include a polymer material base and a metal layer.
- the composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
- the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds.
- the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.
- the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.
- the negative electrode current collector may be a metal foil or a composite current collector.
- the metal foil aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used.
- the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.
- the negative electrode active material may adopt the negative electrode active material for the battery known in the art.
- the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials and lithium titanate, etc.
- the silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites and silicon alloys.
- the tin-based material may be selected from at least one of elemental tin, tin oxide compounds and tin alloys.
- the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.
- the separator is a separator.
- the present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.
- the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.
- the separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions.
- the separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.
- the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.
- the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes.
- the electrolyte can be liquid, gel or solid.
- the liquid electrolyte includes an electrolyte salt and a solvent.
- the electrolyte salt may include lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate ...
- bis(trifluoromethanesulfonyl)imide lithium bis(trifluoromethanesulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium bis(trifluoromethanesulfonyl) At least one of lithium phosphate, lithium difluorobis(oxalate) phosphate and lithium tetrafluorooxalate phosphate.
- the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone.
- the solvent may also be an ether solvent.
- the ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.
- the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.
- solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.
- the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, and the like.
- the inorganic solid electrolyte may include an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.
- oxide solid electrolyte crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film
- a sulfide solid electrolyte crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide)
- a halide solid electrolyte a nitride solid electrolyt
- the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.
- the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.
- the electrode assembly is a laminate structure.
- the battery cell may include a housing.
- the housing is used to encapsulate components such as the electrode assembly and the electrolyte.
- the housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.
- the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte.
- the shell may be provided with one or more openings.
- One or more end caps may also be provided.
- At least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab of the electrode assembly.
- the electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through an adapter.
- the electrode terminal may be disposed on the end cap, or may be disposed on the housing.
- an explosion-proof valve is provided on the housing, and the explosion-proof valve is used to release the internal pressure of the battery cell.
- the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes.
- the prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal prismatic battery, such as a hexagonal prismatic battery, etc. There is no particular limitation in the embodiments of the present application.
- 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 may be a battery module.
- the multiple battery cells are arranged and fixed to form a battery module.
- the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.
- the box body can be used as a part of the chassis structure of the vehicle.
- part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.
- the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.
- Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and small self-discharge coefficient. They are an important part of the development of new energy today.
- the battery cells disclosed in the embodiments of the present application can be used, but not limited to, in electrical equipment such as vehicles, ships or aircraft.
- the power supply system of the electrical equipment can be composed of the battery cells and batteries disclosed in the present application.
- the embodiment of the present application provides an electric device using a battery cell as a power source
- the electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, 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.
- Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle.
- the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
- a battery 100 is arranged inside the vehicle 1000, and the battery 100 can be arranged at the bottom, head or tail of the vehicle 1000.
- the battery 100 can be used to power the vehicle 1000.
- the battery 100 can be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, such as for the working power requirements during the startup, navigation and operation of the vehicle 1000.
- the vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .
- the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
- FIG. 2 is an exploded view of a battery provided in the first embodiment of the present application.
- the battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10.
- the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures.
- the box 10 may include a first sub-box 11 and a second sub-box 12, and the first sub-box 11 and the second sub-box 12 cover each other, and the first sub-box 11 and the second sub-box 12 jointly define a storage space for accommodating the battery cell 20.
- 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.
- the battery cell 20 may be a secondary battery or a primary battery; the battery cell 20 may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
- FIG. 3 is an exploded view of a battery cell provided in some embodiments of the present application.
- a battery cell 20 includes a housing 21, an electrode assembly 22, and an electrode terminal 25.
- the housing 21 includes a shell 211 and a cover plate 212, wherein the shell 211 has an opening, and the cover plate 212 closes the opening to isolate the internal environment of the battery cell 20 from the external environment.
- the shell 211 is a component used to cooperate with the cover plate 212 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 22, the electrolyte and other components.
- the shell 211 and the cover plate 212 can be independent components.
- the shell 211 can be of various shapes and sizes. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 22.
- the material of the shell 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.
- the cover plate 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 20 from the external environment.
- the shape of the cover plate 212 can be adapted to the shape of the shell 211 to match the shell 211.
- the cover plate 212 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cover plate 212 is not easily deformed when squeezed or collided, so that the battery cell 20 can have a higher structural strength and the reliability can also be improved.
- Functional components such as electrode terminals can be provided on the cover plate 212. The electrode terminals can be used to electrically connect to the electrode assembly 22 for outputting or inputting battery cells. 20 electrical energy.
- the cover plate 212 may also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application embodiment does not impose any special restrictions on this.
- an insulating structure may be provided on the inner side of the cover plate 212, and the insulating structure may be used to isolate the electrical connection components in the housing 211 from the cover plate 212 to reduce the risk of short circuit.
- the insulating structure may be plastic, rubber, etc.
- the electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur.
- One or more electrode assemblies 22 may be included in the housing 211.
- the electrode assembly 22 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet.
- the parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear.
- the positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the pole ears connect the electrode terminals to form a current loop.
- the pressure relief mechanism in a square flat battery, is generally arranged on a side wall with a narrow width.
- the electrode terminal is also arranged on the side wall, and the pressure relief mechanism may have a problem of limited area in order to avoid interference with the electrode terminal.
- the area of the pressure relief mechanism will still be limited due to the overall narrowness of the side wall, resulting in poor exhaust when the battery thermal runaway occurs.
- the pressure relief mechanism is disposed on a side wall with a narrow width, it is difficult to process the pressure relief mechanism on the side wall (for example, the pressure relief notches are processed by laser etching), which results in an increase in manufacturing costs.
- the present application provides a battery cell, the area enclosed by the pressure relief notch of the battery cell is not restricted, and the processing difficulty is reduced.
- the battery cell according to the embodiment of the present application may include a housing 21 and a pressure relief notch 213 .
- the housing 21 can isolate the external environment and the internal environment of the battery cell.
- the housing 21 can be a metal part, and of course can also be an insulating part.
- the housing 21 may define a containing space, in which the electrode assembly and the electrolyte for soaking the electrode assembly may be contained.
- the housing 21 in the embodiment of the present application is flat, so the housing 21 has a large side wall and a small side wall.
- the large side walls generally have two and are opposite to each other in the thickness direction of the housing 21, and the two large side walls are connected by the small side wall.
- the housing 21 is flat, so that multiple battery cells can be stacked in the thickness direction, which is convenient for storing and installing multiple battery elevators.
- the housing 21 along the thickness direction of the housing 21 , the housing 21 includes two first walls 212 a opposite to each other.
- the size of the shell 21 in the thickness direction is smaller than the size of the shell 21 in the width direction, and the size of the shell 21 in the thickness direction is smaller than the size of the shell 21 in the length direction.
- the two first walls 212a are opposite to each other in the thickness direction of the housing 21, so the outer surface area of the first wall 212a is larger than the area of the other side walls. Therefore, the area enclosed by the pressure relief notch 213 provided on the first wall 212a with the largest outer surface area is not limited, and the pressure relief notch 213 of a suitable area can be processed as needed. In addition, the pressure relief notch 213 is provided on the first wall 212a with the largest outer surface area, which makes it easier to process the pressure relief notch 213, thereby reducing the manufacturing cost of the pressure relief notch 213.
- the pressure relief notch 213 is disposed on at least one first wall 212a. That is, only one of the two first walls 212a may be provided with the pressure relief notch 213, or each of the two first walls 212a may be provided with the pressure relief notch 213.
- the structural strength of the portion of the first wall 212 a where the pressure relief notch 213 is provided is lower than that of other portions. Therefore, after thermal runaway of the battery cell occurs, the pressure relief notch 213 will be torn first, thereby quickly discharging the high-pressure gas in the housing 21 .
- the pressure relief notch 213 is generally a groove structure, and the cross-sectional shape of the pressure relief notch 213 may be semicircular, trapezoidal, or other shapes. The present application does not limit the specific shape of the cross-sectional shape of the pressure relief notch 213.
- the shell 21 is flat, and the pressure relief notch 213 is set in the thickness of the shell.
- the area enclosed by the pressure relief notch 213 is not restricted, and the area enclosed by the pressure relief notch 213 and the setting position of the pressure relief notch 213 can be freely selected.
- the outer surface area of the first wall 212a is larger, the processing of the pressure relief notch 213 is easier and the manufacturing cost is reduced.
- the pressure relief notch 213 is a closed annular structure.
- the pressure relief notch 213 is a continuous, end-to-end structure, and there is no opening on the pressure relief notch 213.
- the structural strength of the portion of the housing 21 where the pressure relief notch 213 is provided is more uniform, and when thermal runaway occurs in the battery cell, its ability to withstand high temperature and high pressure is also improved.
- the shape of the pressure relief notch 213 can be circular, track-shaped, polygonal or other special-shaped structures. As long as it is an annular structure connected end to end, it is within the protection scope of the present application.
- the pressure relief notch 213 is an unclosed annular structure. That is to say, the pressure relief notch 213 is not connected end to end, and the pressure relief notch 213 is spaced apart at both ends in the length direction, so that an opening is provided on the pressure relief notch 213. As a result, after thermal runaway of the battery cell occurs, the crack can be torn along the extension direction of the pressure relief notch 213.
- the crack can tear the outer shell 21 along the direction of the opening, so that the tearing direction and tearing range of the crack can be controlled, and the partial valve opening is achieved, which reduces the probability of tearing the outer shell 21 in a large range.
- the tearing direction and tearing range of the crack are both controllable, which reduces the damage to the battery cell caused by the uncontrollable crack, and also reduces the disorderly discharge of high-pressure gas due to the uncontrollable crack and the impact on other battery cells.
- the pressure relief notch 213 is disposed in the central area of the first wall 212 a.
- the area surrounded by the pressure relief notch 213 can be selected as needed.
- disposing the pressure relief notch 213 in the central position of the first wall 212 a can make processing easier and reduce the processing cost of the pressure relief notch 213.
- the pressure relief notch 213 is disposed at the corner region of the first wall 212a.
- the area enclosed by the pressure relief notch 213 is not limited, and when thermal runaway occurs in the battery cell, the crack tears the first wall 212a along the pressure relief notch 213. Since the pressure relief notch 213 is disposed at the corner region of the first wall 212a, the crack can only damage the corner region of the first wall 212a, reducing the probability of the crack damaging a large area of the first wall 212a.
- the pressure relief notch 213 includes an arc segment 201.
- the arc segment 201 is not a complete circle, but an arc segment corresponding to the center angle of a circle. The center angle and radius of the arc segment 201 can be adjusted as needed.
- the arc segment 201 has a first end and a second end, and the first end and the second end are two ends of the arc segment 201 in the length direction.
- the pressure relief notch 213 further includes a first extension segment 202 .
- the first extension segment 202 may be a straight line segment, an arc segment, or other special-shaped line segments (eg, a serpentine shape, etc.). The specific type of the first extension segment 202 is not limited herein.
- the first extension segment 202 may be connected to the first end, and the first extension segment 202 may extend from the first end toward a direction close to the central axis 201 a of the arc segment 201 .
- the central axis 201 a of the arc segment 201 can divide the arc segment 201 into two sub-arc segments, and the two sub-arc segments are symmetrical about the central axis 201 a of the arc segment 201 .
- the extension line of the first extension segment 202 extending in the direction away from the arc segment 201 will eventually intersect with the central axis 201 a of the arc segment 201 .
- the pressure relief notch 213 further includes a second extension segment 203 , which may be a straight line segment, an arc segment, or other special-shaped line segments (eg, a serpentine shape, etc.).
- the specific type of the second extension segment 203 is not limited herein.
- the second extension segment 203 may be connected to the second end, and the second extension segment 203 may extend from the second end toward a direction close to the central axis 201 a of the arc segment 201 .
- extension line of the second extension segment 203 extending in the direction away from the arc segment 201 will eventually intersect with the central axis 201 a of the arc segment 201 .
- the first extension section 202 and the second extension section 203 may also be symmetrical about the central axis 201a of the arc section 201.
- the first extension section 202 and the second extension section 203 may also be asymmetrical about the central axis 201a of the arc section 201, as long as the first extension section 202 and the second extension section 203 are
- the second extension segment 202 extends from the first end toward the direction close to the central axis 201a of the arc segment 201
- the second extension segment 203 extends from the second end toward the direction close to the central axis 201a of the arc segment 201 .
- the pressure relief notch 213 includes an arc segment 201, a first extension segment 202, and a second extension segment 203.
- the arc segment 201 can reduce the stress concentration of the pressure relief notch 213 during processing.
- the first extension segment 202 and the second extension segment 203 can guide the crack to the central axis 201 close to the arc segment 201.
- the first extension segment 202 and the second extension segment 203 are close to each other in the direction of a, so that the first extension segment 202 and the second extension segment 203 can guide the cracks on the outer shell 21 to gradually converge, so that the size of the torn part of the outer shell 21 can be controlled.
- the first extension segment 202 and the second extension segment 203 can also make the tearing direction of the cracks controllable.
- the center angle of the arc segment 201 is ⁇ , which satisfies: 180° ⁇ 360°.
- the center angle may be 180°, 200°, 220°, 240°, 260°, 280°, 300°, 320°, 340°, or 350°.
- the present application does not limit the specific value of the center angle of the arc segment 201, as long as the center angle of the arc segment 201 is within the above range.
- the pressure relief notch 213 is an unclosed annular structure, and there is an opening on the pressure relief notch 213, so that the crack can tear the outer shell along the direction of the opening, so that the tearing direction and tearing range of the crack can be controlled, thereby realizing the partial opening of the crack on the outer shell 21.
- the crack range torn along the arc segment 201 is sufficient, the high-pressure gas in the outer shell 21 can be quickly discharged, and at the same time, the pressure relief notch 213 has an opening, which can guide the tearing direction and tearing range of the crack, and realize the partial opening of the crack on the outer shell 21.
- the central angle ⁇ of the arc segment 201 may be 210°, 240°, 245°, 250°, 255°, 260°, 265°, 270°, 275°, 280°, 285°, 290°, 295°, 300°, or 330°.
- the pressure relief notch 213 is an unclosed annular structure, and the pressure relief notch 213 has an opening and a larger opening range, so that the crack can tear the outer shell along the direction of the opening, not only the tearing direction and tearing range of the crack are controllable, but also the tearing range of the crack is larger, and thus the high-pressure gas in the outer shell 21 can be discharged more quickly.
- the discharge speed of the high-pressure gas in the outer shell 21 can be further increased, and at the same time, the opening size on the arc segment 201 is larger, so that the crack can be guided to a larger tearing range in the outer shell 21, so that the opening can not only guide the tearing direction and tearing range of the crack, but also further increase the discharge speed of the high-pressure gas in the outer shell 21.
- the first extension segment 202 may be tangent to the arc segment 201. That is, the first extension segment 202 coincides with the tangent of the first end.
- the crack on the arc segment 201 can extend and tear very smoothly along the tangent at the first end of the arc segment 201, reducing the obstacles in the crack tearing process, making the crack tearing smoother and more controllable, and reducing the stress concentration during the tearing process.
- first extension segment 202 can be an arc segment or a straight line segment.
- the present application does not limit the segment type of the first extension segment 202 as long as the first extension segment 202 is tangent to the arc segment 201 .
- the second extension segment 203 may be tangent to the arc segment 201. That is, the second extension segment 203 coincides with the tangent of the second end.
- the crack on the arc segment 201 can smoothly extend and tear along the tangent at the second end of the arc segment 201, reducing obstacles in the crack tearing process, making the crack tearing smoother and more controllable, and reducing stress concentration during the tearing process.
- the second extension segment 203 can be an arc segment or a straight line segment.
- the line segment type is limited as long as the second extension segment 203 is tangent to the arc segment 201.
- the first extension segment 202 is a straight segment. Constructing the first extension segment 202 as a straight segment can, on the one hand, make the processing of the first extension segment 202 easier, and on the other hand, the tearing process of the crack on the straight segment is smoother, or in other words, the straight segment can better guide the crack to tear along a preset direction, so that the tearing direction and tearing range of the crack are more controllable.
- the second extension segment 203 is a straight segment. Constructing the second extension segment 203 as a straight segment can, on the one hand, make the processing of the second extension segment 203 easier, and on the other hand, the tearing process of the crack on the straight segment is smoother, or in other words, the straight segment can better guide the crack to tear along a preset direction, so that the tearing direction and tearing range of the crack are more controllable.
- one end of the first extension section 202 away from the arc section 201 and one end of the second extension section 203 away from the arc section 201 are spaced apart to form a first opening 201c.
- one end of the first extension section 202 away from the arc section 201 and one end of the second extension section 203 away from the arc section 201 are not connected to each other, thereby ensuring that the pressure relief notch 213 is in an unsealed state.
- the orientation of the first opening 201c directly affects the tearing direction of the crack. For example, if the first opening 201c is toward the corner of the first wall 212a, then after the battery cell 20 thermally runs away, the high-pressure gas will tear the pressure relief notch 213, and the crack can be torn along the direction of the first opening 201c toward the corner, so that the tearing direction of the crack can be adjusted by adjusting the orientation of the first opening 201c.
- the pressure relief notch 213 is disposed at the corner area of the first wall 212a.
- the pressure relief notch 213 is disposed at the corner area of the first wall 212a.
- the crack can tear the outer shell 21 under the guidance of the pressure relief notch 213. Since the pressure relief notch 213 is disposed at the corner area of the first wall 212a, the tearing area of the crack is also mainly concentrated in the corner area of the first wall 212a, thereby reducing the probability of the crack damaging other areas of the first wall 212a, making it possible to recycle the outer shell 21 after the battery cell 20 has thermal runaway.
- the first opening 201c on the pressure relief notch 213 faces the corner of the first wall 212a. Therefore, when the crack tears the outer shell 21 along the pressure relief notch 213, it can tear along the direction of the first opening 201c, and the tearing direction of the crack faces the corner of the first wall 212a, thereby reducing the probability of the crack moving toward the middle area of the first wall 212a, reducing the probability of the first wall 212a being completely torn, and allowing the outer shell 21 to be recycled.
- the radius of the arc segment 201 a is R, satisfying: 1 mm ⁇ R ⁇ 20 mm.
- the radius of the arc segment 201a can be 1 mm, 3 mm, 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, 15 mm, 17 mm, 19 mm, or 20 mm.
- the present application does not limit the specific value of the radius of the arc segment 201a. As long as the radius of the arc segment 201a is within the above range, it is within the protection scope of the present application.
- the length of the straight line segment is S1, which satisfies: 0 ⁇ S1 ⁇ 20mm.
- the length of the straight line segment can be 1mm, 3mm, 5mm, 7mm, 9mm, 11mm, 13mm, 15mm, 17mm, 19mm, 20mm.
- the length of the straight segment is the length when the first extension segment 202 is constructed as a straight line, or the length when the second extension segment 203 is a straight line.
- the present application does not limit the length of the straight line segment. As long as the radius of the straight line segment is within the above range, it is within the protection scope of the present application.
- the crack can meet the pressure relief requirements of the battery cell 20 during thermal runaway after tearing along the straight line segment; when S1 ⁇ 20mm, the range of the straight line segment is not too large, so that the overall structural strength of the shell 21 meets the requirements.
- S1 ⁇ 20mm the range of the straight line segment is not too large, so that the overall structural strength of the shell 21 meets the requirements.
- 0 ⁇ S1 ⁇ 20mm it can not only meet the pressure relief requirements of the battery cell 20 during thermal runaway, but also make the range of the pressure relief notch 213 not too large. Too large will affect the overall structural strength of the housing 21.
- S1/R can be 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0.
- S1/R represents the degree to which the straight line segment extends relative to the radius of the arc segment. The larger the S1/R, the more the straight line segment extends compared to the radius of the arc segment. The smaller the S1/R, the less the straight line segment extends compared to the radius of the arc segment.
- the straight line segment can extend from one end of the arc segment, and the straight line segment can guide the crack to tear the shell 21. After the crack is torn along the straight line segment, it can meet the pressure relief requirements of the battery cell 20 during thermal runaway; when S1/R ⁇ 2, the length of the straight line segment is not too long, thereby controlling the range of the pressure relief notch 213, so that the overall structural strength of the shell 21 meets the requirements.
- the first wall 212 a includes a first edge 212 a 1 and a second edge 212 a 2 , and the first edge 212 a 1 and the second edge 212 a 2 intersect to form a corner of the first wall 212 a .
- the shortest distance between the center of the pressure relief notch 213 and the first edge 212a1 is S2, and the length of the second edge 212a2 is S, satisfying: 0 ⁇ S2 ⁇ S/2;
- the shortest distance between the center of the pressure relief notch 213 and the second edge 212a2 is T1, and the length of the first edge 212a1 is T, satisfying: 0 ⁇ T1 ⁇ T/2.
- the center of the pressure relief notch 213 is close to a corner defined by the first edge 212a1 and the second edge 212a2. Therefore, the tearing area of the crack is also mainly concentrated in the corner area of the first wall 212a, thereby reducing the probability of the crack damaging other areas of the first wall 212a, making it possible to recycle the housing 21 after the battery cell 20 has thermal runaway.
- the shortest distance between the end of the first extension segment 202 away from the arc segment 201a and the first edge 212a1 is S3, and the length of the second edge 212a2 is S, satisfying: 0 ⁇ S3 ⁇ S/2; the shortest distance between the end of the second extension segment 203 away from the arc segment 201a and the second edge 212a2 is T2, and the length of the first edge 212a1 is T, satisfying: 0 ⁇ T2 ⁇ T/2.
- One end of the first extension segment 202 away from the arc segment 201a is spaced apart from one end of the second extension segment 203 away from the arc segment 201a to form a first opening 201c. Since the shortest distance between one end of the first extension segment 202 away from the arc segment 201a and the first edge 212a1 and the length of the second edge 212a2 meet the above conditions, and the shortest distance between one end of the second extension segment 203 away from the arc segment 201a and the second edge 212a2 and the length of the first edge 212a1 meet the above conditions, the first opening 201c faces the corner defined by the first edge 212a1 and the second edge 212a2.
- the crack tears the outer shell 21 along the pressure relief notch 213, it can be torn along the direction of the first opening 201c, that is, the tearing direction of the crack is toward the corner of the first wall 212a, thereby reducing the probability of the crack moving toward the middle area of the first wall 212a, reducing the probability of the first wall 212a being completely torn, and allowing the outer shell 21 to be recycled.
- the pressure relief notch 213 may be configured as a runway-shaped structure, and the pressure relief notch 213 may include a first arc segment 204, a second arc segment 205, a first straight segment 206, and a second straight segment 207.
- the central angles of the first arc segment 204 and the second arc segment 205 may both be 180°, the first arc segment 204 and the second arc segment 205 are spaced apart in the first direction X, and the first arc segment 204 and the second arc segment 205 protrude in a direction away from each other, that is, the opening formed by the first arc segment 204 and the opening formed by the second arc segment 205 face each other.
- the first straight line segment 206 and the second straight line segment 207 are spaced apart in the second direction Y, the first straight line segment 206 is connected to one end of the first arc segment 204 and the second arc segment 205 in the same direction in the second direction Y, the second straight line segment 207 is connected to the other end of the first arc segment 204 and the second arc segment 205 in the same direction in the second direction Y, and the first direction X and the second direction Y are perpendicular to each other.
- first arc segment 204, the first straight segment 206, the second arc segment 205 and the second straight segment 207 form a racetrack structure.
- the first arc segment 204, the first straight segment 206, the second arc segment 205 and the second straight segment 207 can be formed by laser etching in sequence.
- the length of the first straight line segment 206 or the second straight line segment 207 is L1, which satisfies: 1mm ⁇ L1 ⁇ 40mm.
- the length of the first straight line segment 206 or the second straight line segment 207 can be 1mm, 4mm, 8mm, 12mm, 16mm, 20mm, 24mm, 28mm, 32mm, 36mm, 40mm.
- the present application does not limit the specific value of the length of the first straight line segment 206 or the second straight line segment 207. As long as the length of the first straight line segment 206 or the second straight line segment 207 meets the above range, it is within the protection scope of the present application.
- the length of the first straight line segment 206 or the second straight line segment 207 is L1, which satisfies: 5mm ⁇ L1 ⁇ 30mm.
- the length of the first straight line segment 206 or the second straight line segment 207 can be 5mm, 7mm, 10mm, 13mm, 15mm, 17mm, 20mm, 23mm, 25mm, 27mm, 30mm.
- the present application does not limit the specific value of the length of the first straight line segment 206 or the second straight line segment 207. As long as the length of the first straight line segment 206 or the second straight line segment 207 meets the above range, it is within the protection scope of the present application.
- the distance between the first straight line segment 206 and the second straight line segment 207 is W1, which satisfies: 1mm ⁇ W1 ⁇ 40mm.
- the first straight line segment 206 and the second straight line segment 207 can both extend along the first direction X, so that the first straight line segment 206 and the second straight line segment 207 are parallel to each other.
- the distance between the first straight line segment 206 and the second straight line segment 207 can be 1mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm.
- the present application does not limit the specific value of the distance between the first straight line segment 206 and the second straight line segment 207. As long as the distance between the first straight line segment 206 and the second straight line segment 207 meets the above range, it is within the protection scope of the present application.
- the distance between the first straight line segment 206 and the second straight line segment 207 is W1, which satisfies: 1mm ⁇ W1 ⁇ 10mm.
- the first straight line segment 206 and the second straight line segment 207 can both extend along the first direction X, so that the first straight line segment 206 and the second straight line segment 207 are parallel to each other.
- the distance between the first straight line segment 206 and the second straight line segment 207 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm.
- the present application does not limit the specific value of the distance between the first straight line segment 206 and the second straight line segment 207. As long as the distance between the first straight line segment 206 and the second straight line segment 207 meets the above range, it is within the protection scope of the present application.
- the first straight segment 206 includes a first sub-segment 206a and a second sub-segment 206b, one end of the first sub-segment 206a is connected to the first arc segment 204, one end of the second sub-segment 206b is connected to the second arc segment 205, and the other end of the first sub-segment 206a and the other end of the second sub-segment 206b are spaced apart to form a second opening 208.
- the pressure relief notch 213 is also a runway-shaped structure, it is not a closed runway-shaped structure, and an unclosed area is provided on the first straight segment 206.
- the pressure relief notch 213 tears the shell 21, while the area where the second opening 208 is located will not be disconnected from the shell 21, but guides the gas to continue tearing the shell 21 until the desired tearing effect is achieved.
- the second opening 208 can guide the tearing direction of the crack, so that the tearing direction and tearing range of the crack are controllable.
- the length of the pressure relief notch 213 is L
- the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X is L2, which satisfies: 0.05 ⁇ L2/L ⁇ 0.8.
- the ratio of the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X to the length of the pressure relief notch 213 may be 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8.
- the present application does not limit the specific numerical value of the ratio of the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X to the length of the pressure relief notch 213. As long as the ratio of the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X to the length of the pressure relief notch 213 satisfies the above range, it is within the protection scope of the present application.
- the second opening 208 guides the crack to tear the outer shell 21, so that after the battery cell 20 has thermal runaway, the gas in the outer shell 21 can be quickly discharged;
- L2/L ⁇ 0.8 when the crack tears the outer shell 21 along the direction of the second opening 208, the tearing range will not be too large, reducing the probability of large-scale damage to the outer shell 21.
- 0.05 ⁇ L2/L ⁇ 0.8 after the battery cell 20 has thermal runaway, the gas in the outer shell 21 can be quickly discharged to the outside, while also reducing the probability of large-scale damage to the outer shell 21.
- the length of the pressure relief notch 213 is L
- the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X is L2, which satisfies: 0.05 ⁇ L2/L ⁇ 0.4.
- the ratio of the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X to the length of the pressure relief notch 213 may be 0.05, 0.08, 0.12, 0.16, 0.2, 0.24, 0.28, 0.32, or 0.4.
- the present application does not limit the specific value of the ratio of the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X to the length of the pressure relief notch 213. As long as the ratio of the distance between the first sub-segment 206a and the second sub-segment 206b in the first direction X to the length of the pressure relief notch 213 satisfies the above range, it is within the protection scope of the present application.
- the second opening 208 guides the crack to tear the outer shell 21, so that after the battery cell 20 has thermal runaway, the gas in the outer shell 21 can be quickly discharged;
- L2/L ⁇ 0.4 when the crack tears the outer shell 21 along the direction of the second opening 208, the tearing range will not be too large, further reducing the probability of large-scale damage to the outer shell 21.
- 0.05 ⁇ L2/L ⁇ 0.4 after the battery cell 20 has thermal runaway, the gas in the outer shell 21 can be quickly discharged to the outside, while also further reducing the probability of large-scale damage to the outer shell 21.
- the shell 21 includes a shell 211 and a cover plate 212
- the shell 211 includes a bottom wall 211a and a peripheral side wall 211b
- one end of the peripheral side wall 211b is connected to the outer periphery of the bottom wall 211a
- the other end of the peripheral side wall 211b forms an opening
- the cover plate 212 closes the opening
- the first wall 212a is the cover plate 212 or the bottom wall 211a.
- the housing 21 is formed by two separate parts, the housing 211 and the cover plate 212.
- the housing 211 and the cover plate 212 can be metal parts, and the two can be fixed together by welding.
- the first wall 212a is the cover plate 212 or the bottom wall 211a, so the pressure relief notch 201 is set on the cover plate 212 or the bottom wall 211a.
- the pressure relief notch 201 is set on the large surface of the housing 21.
- the housing 21 is made of stainless steel, and the pressure relief notch 201 can be formed by laser etching.
- the pressure relief notch 201 can also be formed by stamping, and the present application does not limit the forming method of the pressure relief notch 201.
- the cross-sectional shape of the pressure relief notch 201 may be a trapezoid, the longer of the two parallel sides of the trapezoid being located at the opening 203 of the groove of the pressure relief notch 201, the shorter of the two parallel sides having a length of 0.05 mm to 1.0 mm, and the bottom angle of the trapezoid (the angle between the bottom wall and the surrounding wall of the trapezoidal groove) may be 30° to 60°.
- the cross section of the pressure relief notch 201 is a trapezoid, which has better consistency and less stress concentration.
- the cross section of the pressure relief notch 201 can also be a triangle, an arc or a rectangle.
- the battery according to the embodiment of the present application includes the battery cell 20 of the above embodiment. Since the battery according to the embodiment of the present application is provided with the above battery cell 20, the processing of the battery is easier and the manufacturing cost is reduced.
- the electric device according to the embodiment of the present application includes the above-mentioned battery. Since the electric device according to the embodiment of the present application is provided with the above-mentioned battery, the manufacturing difficulty and processing cost of the electric device are reduced.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
本申请公开一种一种电池单体、电池和用电设备,本申请涉及电池技术领域。电池单体包括外壳和泄压刻痕,外壳呈扁平状,沿所述外壳的厚度方向,所述外壳包括两个彼此相对的第一壁;泄压刻痕设置于至少一个所述第一壁。根据本申请实施例的电池单体,泄压刻痕围成的面积不会受到限制,同时泄压刻痕的加工更加容易,且制造成本得到了降低。
Description
相关申请的交叉引用
本申请要求享有于2023年11月30日提交的名称为“电池单体、电池和用电设备”的中国专利申请2023116411629的优先权,该申请的全部内容通过引用并入本文中。
本申请涉及电池技术领域,具体而言,涉及一种电池单体、电池和用电设备。
节能减排是汽车产业可持续发展的关键,电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言,电池技术又是关乎其发展的一项重要因素。
电池广泛应用于便携式电子设备、电动交通工具、电动工具、无人机、储能设备等领域。电池的制造过程中,电池的制造成本是一个不可忽视的问题。因此,如何降低电池的制造成本是电池技术中一个亟需解决的技术问题。
发明内容
本申请提供一种电池单体、电池和用电设备,泄压刻痕设置于大面上,因此泄压刻痕的加工更加容易,电池的制造成本能够得到降低。
本申请是通过下述技术方案实现的:
第一方面,本申请实施例提供一种电池单体,包括外壳和泄压刻痕,外壳呈扁平状,沿所述外壳的厚度方向,所述外壳包括两个彼此相对的第一壁;泄压刻痕设置于至少一个所述第一壁。
根据本申请实施例的电池单体,外壳为扁平状,通过将泄压刻痕设置于在壳体的厚度方向上相对的两个第一壁中的至少一个上,使得泄压刻痕围成的面积不会受到限制,可以自由地选择泄压刻痕围成的面积以及泄压刻痕的设置位置,同时由于第一壁的外表面的面积较大,因此泄压刻痕的加工更加容易,且制造成本得到了降低。
根据本申请的一些实施例,所述泄压刻痕为封闭的环形结构。在上述方案中,外壳上设置有泄压刻痕部分的结构强度更加均匀,在电池单体发生热失控时,其耐高温和耐高压的能力也得到了提升。
根据本申请的一些实施例,所述泄压刻痕为未封闭的环形结构。在上述方案中,电池单体发生热失控后,裂痕可以沿着泄压刻痕的延伸方向撕裂,同时由于开口的存在,裂痕可以沿着开口的朝向撕裂外壳,从而使得裂痕的撕裂方向和撕裂范围可控,实现局部开阀,降低了大范围撕裂外壳的几率,裂痕的撕裂方向和撕裂范围均可控,减少了由于裂痕的不可控对电池单体造成的损害,也减少由于裂痕不可控导致高压气体无序排出、对其他电池单体造成的影响。
根据本申请的一些实施例,所述泄压刻痕位于所述第一壁的中心区域。在上述方案中,泄压刻痕围成的面积可以根据需要进行选择。另外,将泄压刻痕设置于第一壁的中心位置,可以使得加工更加容易,降低泄压刻痕的加工成本。
根据本申请的一些实施例,所述泄压刻痕设置于所述第一壁的边角区域。在上述方案中,泄压刻痕围成的面积不会受到限制,同时在电池单体发生热失控时,裂痕沿着泄压刻痕撕裂第一壁,由于泄压刻痕设置于第一壁的边角区域,因此裂痕可以仅破坏第一壁的边角区域,降低裂痕将第一壁大范围破坏的几率。
根据本申请的一些实施例,所述泄压刻痕包括圆弧段、第一延长段和第二延长段,所述圆弧段具有第一端和第二端,所述第一延长段从所述第一端向靠近所述圆弧段的中轴线的方向延伸,所述第二延长段从所述第二端向靠近所述圆弧段的中轴线的方向延伸。在上述方案中,在电池单体发
生热失控且泄压刻痕被撕裂后,可以实现局部开阀,降低了大范围撕裂外壳的几率,裂痕的撕裂方向和撕裂范围均可控,减少了由于裂痕的不可控对电池单体造成的损害,也减少由于裂痕不可控导致高压气体无序排出、对其他电池单体造成的影响。
根据本申请的一些实施例,所述圆弧段的圆心角为α,满足:180°≤α<360°。在上述方案中,当α≥180°时,圆弧段围设的面积足够,从而在电池单体发生热失控时,裂痕沿着圆弧段撕裂外壳,在圆弧段上的裂痕可以使外壳内的高压气体快速排出;当α<360°时,泄压刻痕为未封闭的环形结构,泄压刻痕上具有开口,从而裂痕可以沿着开口的朝向撕裂外壳,使得裂痕的撕裂方向和撕裂范围可控,进而实现裂痕在外壳上局部开阀。当180°≤α<360°时,既可以使沿着圆弧段撕裂的裂痕范围足够、外壳内的高压气体能够快速排出,同时泄压刻痕上具有开口,可以引导裂痕的撕裂方向和撕裂范围,实现裂痕在外壳上局部开阀。
根据本申请的一些实施例,所述第一延长段与所述圆弧段相切;和/或所述第二延长段与所述圆弧段相切。在上述方案中,圆弧段上的裂痕可以非常顺畅地沿着圆弧段的第一端处的切线或第二端处的切线延伸、撕裂,减少裂痕撕裂过程的阻碍,使得裂痕撕裂更加顺畅、可控,减少撕裂过程中的应力集中。
根据本申请的一些实施例,所述第一延长段为直线段;和/或所述第二延长段为直线段。在上述方案中,一方面可以第一延长段和/或第二延长段的加工更加容易,另一方面,裂痕在直线段上的撕裂过程更加顺畅,或者说,直线段可以更好地引导裂痕沿预设方向撕裂,从而使得裂痕的撕裂方向和撕裂范围更加可控。
根据本申请的一些实施例,所述第一延长段远离所述圆弧段的一端和所述第二延长段远离所述圆弧段的一端间隔开以形成第一开口。在上述方案中,第一开口的朝向直接影响裂痕的撕裂方向,例如,若第一开口朝向第一壁的边角,那么在电池单体热失控后、高压气体会撕裂泄压刻痕,且裂痕可以沿着第一开口朝向边角的方向撕裂,从而可以调整第一开口的朝向来调整裂痕的撕裂方向。
根据本申请的一些实施例,所述泄压刻痕设置于所述第一壁的边角区域且所述第一开口朝向所述第一壁的边角。在上述方案中,在电池单体发生热失控时,裂痕可以在泄压刻痕的引导下撕裂外壳,由于泄压刻痕设置于第一壁的边角区域,因此裂痕的撕裂区域也主要集中在第一壁的边角区域,从而可以减少裂痕对第一壁的其他区域的破坏几率,使得电池单体在发生热失控后,外壳的回收成为可能。
根据本申请的一些实施例,所述泄压刻痕包括:第一弧线段和第二弧线段,所述第一弧线段和所述第二弧线段在第一方向上间隔设置,所述第一弧线段和所述第二弧线段朝向远离彼此的方向凸出;第一直线段和第二直线段,所述第一直线段连接在所述第一弧线段和所述第二弧线段在第二方向上的同向一端,所述第二直线段连接在所述第一弧线段和所述第二弧线段在所述第二方向上的同向另一端,所述第一方向和所述第二方向彼此垂直。
在上述方案中,第一弧线段、第一直线段、第二弧线段和第二直线段形成了跑道形结构,且第一弧线段、第一直线段、第二弧线段和第二直线段可以通过激光依次蚀刻而成。
根据本申请的一些实施例,所述第一直线段或所述第二直线段的长度为L1,满足:1mm≤L1≤40mm。在上述方案中,当L1≥1mm时,在电池单体发生热失控后,裂痕沿着泄压刻痕撕裂外壳后,外壳内的高温高压气体可以被迅速排出,当L1≤40mm,泄压刻痕的整体尺寸不会过大,从而使得外壳的整体结构强度满足要求。当1mm≤L1≤40mm时,既可以使得电池单体发生热失控后外壳内的气体被快速排出,同时外壳的整体结构强度也满足要求。
根据本申请的一些实施例,满足:5mm≤L1≤30mm。在上述方案中,当L1≥5mm时,在电池单体发生热失控后,裂痕沿着泄压刻痕撕裂外壳后,外壳内的高温高压气体可以被更加迅速地排出,当L1≤30mm,泄压刻痕的整体尺寸不会过大,从而使得外壳的整体结构强度可以进一步满足要求。当5mm≤L1≤30mm时,既可以使得电池单体发生热失控后外壳内的气体被更加快速地排出,同时外壳的整体结构强度也进一步满足要求。
根据本申请的一些实施例,在所述第二方向上,所述第一直线段和所述第二直线段之间的距
离为W1,满足:1mm≤W1≤40mm。在上述方案中,当W1≥1mm时,在电池单体发生热失控后,裂痕沿着泄压刻痕撕裂外壳后,外壳内的高温高压气体可以被迅速排出,当W1≤40mm,泄压刻痕的整体尺寸不会过大,从而使得外壳的整体结构强度满足要求。当1mm≤W1≤40mm时,既可以使得电池单体发生热失控后外壳内的气体被快速排出,同时外壳的整体结构强度也满足要求。
根据本申请的一些实施例,满足:1mm≤W1≤10mm。在上述方案中,当W1≥1mm时,在电池单体发生热失控后,裂痕沿着泄压刻痕撕裂外壳后,外壳内的高温高压气体可以被迅速排出,当W1≤10mm,泄压刻痕的整体尺寸不会过大,从而使得外壳的整体结构强度进一步满足要求。当1mm≤W1≤10mm时,既可以使得电池单体发生热失控后外壳内的气体被快速排出,同时外壳的整体结构强度也进一步满足要求。
根据本申请的一些实施例,所述第一直线段包括第一子段和第二子段,所述第一子段的一端与所述第一弧线段连接,所述第二子段的一端与所述第二弧线段连接,所述第一子段的另一端和所述第二子段的另一端间隔设置以形成第二开口。在上述方案中,可以实现侧壁上进行局部开阀,电池单体的内部出现热失控时,气体可以沿着泄压刻痕撕裂外壳,同时第二开口所在的区域不会与外壳断开,而是引导气体继续撕裂外壳,直到达到想要的撕裂效果。也就是说,第二开口可以引导裂痕的撕裂方向,使得裂痕的撕裂方向和撕裂范围可控。
根据本申请的一些实施例,所述泄压刻痕的长度为L,所述第一子段和所述第二子段在所述第一方向上间隔的距离为L2,满足:0.05≤L2/L≤0.8。在上述方案中,当L2/L≥0.05时,第二开口引导裂痕撕裂外壳,使得在电池单体在发生热失控后,外壳内的气体可以被迅速排出;当L2/L≤0.8,可以使得裂痕沿第二开口的朝向撕裂外壳时,撕裂的范围不至于过大,降低外壳被大范围破坏的几率。当0.05≤L2/L≤0.8时,既可以在电池单体发生热失控后,外壳内的气体能够迅速地向外排出,同时也降低了外壳被大范围破坏的几率。
根据本申请的一些实施例,满足:0.05≤L2/L≤0.4。在上述方案中,当L2/L≥0.05时,第二开口引导裂痕撕裂外壳,使得在电池单体在发生热失控后,外壳内的气体可以被迅速排出;当L2/L≤0.4,可以使得裂痕沿第二开口的朝向撕裂外壳时,撕裂的范围不至于过大,进一步降低外壳被大范围破坏的几率。当0.05≤L2/L≤0.4时,既可以在电池单体发生热失控后,外壳内的气体能够迅速地向外排出,同时也进一步降低了外壳被大范围破坏的几率。
根据本申请的一些实施例,所述外壳包括壳体和盖板,所述壳体包括底壁和周侧壁,所述周侧壁的一端与所述底壁的外周沿连接,所述周侧壁的另一端围成开口,所述盖板封闭所述开口;其中所述第一壁为所述盖板或所述底壁。在上述方案中,外壳由两个分体部件-壳体和盖板共同形成,壳体和盖板可以为金属件,二者可以通过焊接的方式固定在一起。
第二方面,本申请实施例提供一种电池,包括上述的电池单体。由于根据本申请实施例的电池设置有上述的电池单体,因此电池的加工更加容易,且制造成本得到了降低。
第三方面,本申请实施例提供一种用电设备,包括上述的电池单体或上述的电池,所述电池单体或所述电池用于提供电能。因此该用电设备的制造难度和加工成本得到了降低。
本申请的附加方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得明显,或通过本申请的实践了解到。
为了更清楚地说明本申请实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本申请的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1为本申请实施例提供的车辆的示意图;
图2为本申请实施例提供的电池的爆炸图;
图3为本申请实施例提供的电池单体的爆炸图;
图4为本申请实施例提供的一个第一壁的示意图;
图5为图4圈示A的局部放大示意图;
图6为本申请实施例提供的另一个第一壁的示意图;
图7为本申请实施例提供的再一个第一壁的示意图;
图8为图7圈示B的局部放大示意图;
图9为本申请实施例提供的再一个第一壁的示意图。
图标:车辆1000,电池100,控制器200,马达300,箱体10,电池单体20,第一子箱体11,第二子箱体12,外壳21,电极组件22,电极端子25,壳体211,底壁211a,周侧壁211b,盖板212,
第一壁212a,第一边缘212a1,第二边缘212a2,
泄压刻痕213,圆弧段201,第一延长段202,第二延长段203,中轴线201a,第一开口
201c,第一弧线段204,第二弧线段205,第一直线段206,第二直线段207,第一子段206a,第二子段206b,第二开口208。
第一壁212a,第一边缘212a1,第二边缘212a2,
泄压刻痕213,圆弧段201,第一延长段202,第二延长段203,中轴线201a,第一开口
201c,第一弧线段204,第二弧线段205,第一直线段206,第二直线段207,第一子段206a,第二子段206b,第二开口208。
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
除非另有定义,本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同;本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限定本申请;本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形,意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象,而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着,结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例,也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是,本申请所描述的实施例可以与其它实施例相结合。
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“附接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本申请中字符“/”,一般表示前后关联对象是一种“或”的关系。
本申请中出现的“多个”指的是两个以上(包括两个),同理,“多组”指的是两组以上(包括两组),“多片”指的是两片以上(包括两片)。
在一些实施例中,电池可以为电池模块,电池单体有多个时,多个电池单体排列并固定形成一个电池模块。
在一些实施例中,电池可以为电池包,电池包包括箱体和电池单体,电池单体或电池模块容纳于箱体中。
在一些实施例中,箱体可以作为车辆的底盘结构的一部分。例如,箱体的部分可以成为车辆的地板的至少一部分,或者,箱体的部分可以成为车辆的横梁和纵梁的至少一部分。
在一些实施例中,电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
本申请实施例中,电池单体可以为二次电池,二次电池是指在电池单体放电后可通过充电的方式使活性材料激活而继续使用的电池单体。
电池单体可以但不限于为锂离子电池、钠离子电池、钠锂离子电池、锂金属电池、钠金属电池、锂硫电池、镁离子电池、镍氢电池、镍镉电池、铅蓄电池等。
电池单体一般包括电极组件。电极组件包括正极、负极以及隔离件。在电池单体充放电过程中,活性离子(例如锂离子)在正极和负极之间往返嵌入和脱出。隔离件设置在正极和负极之间,可以起到防止正负极短路的作用,同时可以使活性离子通过。
在一些实施例中,正极可以为正极片,正极片可以包括正极集流体以及设置在正极集流体至少一个表面的正极活性材料。
作为示例,正极集流体具有在其自身厚度方向相对的两个表面,正极活性材料设置在正极集流体相对的两个表面的任意一者或两者上。
作为示例,正极集流体可采用金属箔片或复合集流体。例如,作为金属箔片,可以采用表面镀银处理的铝、表面镀银处理的不锈钢、不锈钢、铜、铝、镍、炭精电极、碳、镍或钛等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铝、铝合金、镍、镍合金、钛、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例,正极活性材料可包括以下材料中的至少一种:含锂磷酸盐、锂过渡金属氧化物及其各自的改性化合物。但本申请并不限定于这些材料,还可以使用其他可被用作电池正极活性材料的传统材料。
在一些实施例中,负极可以为负极片,负极片可以包括负极集流体。
作为示例,负极集流体可采用金属箔片或复合集流体。例如,作为金属箔片,可以采用表面镀银处理的铝、表面镀银处理的不锈钢、不锈钢、铜、铝、镍、炭精电极、用碳、镍或钛等。
在一些实施例中,负极集流体具有在其自身厚度方向相对的两个表面,负极活性材料设置在负极集流体相对的两个表面中的任意一者或两者上。
作为示例,负极活性材料可采用本领域公知的用于电池的负极活性材料。作为示例,负极活性材料可包括以下材料中的至少一种:人造石墨、天然石墨、软炭、硬炭、硅基材料、锡基材料和钛酸锂等。硅基材料可选自单质硅、硅氧化合物、硅碳复合物、硅氮复合物以及硅合金中的至少一种。锡基材料可选自单质锡、锡氧化合物以及锡合金中的至少一种。但本申请并不限定于这些材料,还可以使用其他可被用作电池负极活性材料的传统材料。这些负极活性材料可以仅单独使用一种,也可以将两种以上组合使用。
在一些实施方式中,隔离件为隔离膜。本申请对隔离膜的种类没有特别的限制,可以选用任意公知的具有良好的化学稳定性和机械稳定性的多孔结构隔离膜。
作为示例,隔离膜的主要材质可选自玻璃纤维、无纺布、聚乙烯、聚丙烯及聚偏二氟乙烯,陶瓷中的至少一种。隔离膜可以是单层薄膜,也可以是多层复合薄膜,没有特别限制。在隔离膜为多层复合薄膜时,各层的材料可以相同或不同,没有特别限制。隔离件可以是单独的一个部件位于正负极之间,也可以附着在正负极的表面。
在一些实施方式中,隔离件为固态电解质。固态电解质设于正极和负极之间,同时起到传输离子和隔离正负极的作用。
在一些实施方式中,电池单体还包括电解质,电解质在正、负极之间起到传导离子的作用。电解质可以是液态的、凝胶态的或固态的。其中,液态电解质包括电解质盐和溶剂。
在一些实施方式中,电解质盐可以包括六氟磷酸锂、四氟硼酸锂、高氯酸锂、六氟砷酸锂、双氟磺酰亚胺锂、双三氟甲磺酰亚胺锂、三氟甲磺酸锂、二氟磷酸锂、二氟草酸硼酸锂、二草酸硼
酸锂、二氟二草酸磷酸锂及四氟草酸磷酸锂中的至少一种。
在一些实施方式中,溶剂可以包括碳酸亚乙酯、碳酸亚丙酯、碳酸甲乙酯、碳酸二乙酯、碳酸二甲酯、碳酸二丙酯、碳酸甲丙酯、碳酸乙丙酯、碳酸亚丁酯、氟代碳酸亚乙酯、甲酸甲酯、乙酸甲酯、乙酸乙酯、乙酸丙酯、丙酸甲酯、丙酸乙酯、丙酸丙酯、丁酸甲酯、丁酸乙酯、1,4-丁内酯、环丁砜、二甲砜、甲乙砜及二乙砜中的至少一种。溶剂也可选醚类溶剂。醚类溶剂可以包括乙二醇二甲醚、乙二醇二乙醚、二乙二醇二甲醚、三乙二醇二甲醚、四乙二醇二甲醚、1,3-二氧戊环、四氢呋喃、甲基四氢呋喃、二苯醚及冠醚中的一种或多种。
其中,凝胶态电解质包括以聚合物作为电解质的骨架网络,搭配离子液体-锂盐。
其中,固态电解质包括聚合物固态电解质、无机固态电解质、复合固态电解质。
作为示例,聚合物固态电解质可以为聚醚(聚氧化乙烯)、聚硅氧烷、聚碳酸酯、聚丙烯腈、聚偏氟乙烯、聚甲基丙烯酸甲酯、单离子聚合物、聚离子液体-锂盐、纤维素等。
作为示例,无机固态电解质可以包括氧化物固体电解质(晶态的钙钛矿、钠超导离子导体、石榴石、非晶态的LiPON薄膜)、硫化物固体电解质(晶态的锂超离子导体(锂锗磷硫、硫银锗矿)、非晶体硫化物)以及卤化物固体电解质、氮化物固体电解质及氢化物固体电解质中的一种或多种。
作为示例,复合固态电解质通过在聚合物固体电解质中增加无机固态电解质填料形成。
在一些实施方式中,电极组件为卷绕结构。正极片、负极片卷绕成卷绕结构。
在一些实施方式中,电极组件为叠片结构。
在一些实施方式中,电池单体可以包括外壳。外壳用于封装电极组件及电解质等部件。外壳可以为钢壳、铝壳、塑料壳(如聚丙烯)、复合金属壳(如铜铝复合外壳)或铝塑膜等。
在一些实施方式中,外壳包括端盖和壳体,壳体设有开口,端盖封闭开口以形成用于容纳电极组件和电解质等物质的密闭空间。壳体可设有一个或多个开口。端盖也可设置一个或者多个。
在一些实施方式中,外壳上设置有至少一个电极端子,电极端子与电极组件的极耳电连接。电极端子可以与极耳直接连接,也可以通过转接件与极耳间接连接。电极端子可以设置于端盖上,也可以设置在壳体上。
在一些实施方式中,外壳上设置有防爆阀。防爆阀用于泄放电池单体的内部压力。
作为示例,电池单体可以为圆柱形电池单体、棱柱电池单体、软包电池单体或其它形状的电池单体,棱柱电池单体包括方壳电池单体、刀片形电池单体、多棱柱电池,多棱柱电池例如为六棱柱电池等,本申请实施例没有特别的限制。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。
在一些实施例中,电池可以为电池模块,电池单体有多个时,多个电池单体排列并固定形成一个电池模块。
在一些实施例中,电池可以为电池包,电池包包括箱体和电池单体,电池单体或电池模块容纳于箱体中。
在一些实施例中,箱体可以作为车辆的底盘结构的一部分。例如,箱体的部分可以成为车辆的地板的至少一部分,或者,箱体的部分可以成为车辆的横梁和纵梁的至少一部分。
在一些实施例中,电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
电池具有能量密度高、环境污染小、功率密度大、使用寿命长、适应范围广、自放电系数小等突出的优点,是现今新能源发展的重要组成部分。
电池技术的发展要同时考虑多方面的设计因素,例如,能量密度、放电容量、充放电倍率等
性能参数,另外,还需要考虑电池的装配效率。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电设备中。可以使用具备本申请公开的电池单体、电池等组成该用电设备的电源系统。
本申请实施例提供一种使用电池单体作为电源的用电设备,用电设备可以为但不限于手机、平板电脑、笔记本电脑、电动玩具、电动工具、电动自行车、电动摩托车、电动汽车、轮船、航天器等等。其中,电动玩具可以包括固定式或移动式的电动玩具,例如,游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等,航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明,以本申请一实施例的一种用电设备为车辆1000为例进行说明。
请参照图1,图1为本申请第一实施例提供的车辆的示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车,新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100,电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电,例如,电池100可以作为车辆1000的操作电源,用于车辆1000的电路系统,例如用于车辆1000的启动、导航和运行时的工作用电需求。
车辆1000还可以包括控制器200和马达300,控制器200用来控制电池100为马达300供电,例如,用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中,电池100不仅可以作为车辆1000的操作电源,还可以作为车辆1000的驱动电源,代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2,图2为本申请第一实施例提供的电池的爆炸图。电池100包括箱体10和电池单体20,电池单体20容纳于箱体10内。其中,箱体10用于为电池单体20提供容纳空间,箱体10可以采用多种结构。在一些实施例中,箱体10可以包括第一子箱体11和第二子箱体12,第一子箱体11与第二子箱体12相互盖合,第一子箱体11和第二子箱体12共同限定出用于容纳电池单体20的容纳空间。第二子箱体12可以为一端开口的空心结构,第一子箱体11可以为板状结构,第一子箱体11盖合于第二子箱体12的开口侧,以使第一子箱体11与第二子箱体12共同限定出容纳空间;第一子箱体11和第二子箱体12也可以是均为一侧开口的空心结构,第一子箱体11的开口侧盖合于第二子箱体12的开口侧。
在电池100中,电池单体20可以是多个,多个电池单体20之间可串联或并联或混联,混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起,再将多个电池单体20构成的整体容纳于箱体10内;当然,电池100也可以是多个电池单体20先串联或并联或混联组成电池模块形式,多个电池模块再串联或并联或混联形成一个整体,并容纳于箱体10内。电池100还可以包括其他结构,例如,该电池100还可以包括汇流部件,用于实现多个电池单体20之间的电连接。
其中,电池单体20可以为二次电池或一次电池;电池单体20还可以是锂硫电池、钠离子电池或镁离子电池,但不局限于此。
请参照图3,图3为本申请一些实施例提供的电池单体的爆炸图。如图3所示,电池单体20包括外壳21、电极组件22及电极端子25。外壳21包括壳体211和盖板212,壳体211具有开口,盖板212封闭开口,以将电池单体20的内部环境与外部环境隔绝。
壳体211是用于配合盖板212以形成电池单体20的内部环境的组件,其中,形成的内部环境可以用于容纳电极组件22、电解液以及其他部件。壳体211和盖板212可以是独立的部件。壳体211可以是多种形状和多种尺寸的。具体地,壳体211的形状可以根据电极组件22的具体形状和尺寸大小来确定。壳体211的材质可以是多种,比如,铜、铁、铝、不锈钢、铝合金、塑胶等。
盖板212是指盖合于壳体211的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地,盖板212的形状可以与壳体211的形状相适应以配合壳体211。可选地,盖板212可以由具有一定硬度和强度的材质(如铝合金)制成,这样,盖板212在受挤压碰撞时就不易发生形变,使电池单体20能够具备更高的结构强度,可靠性也可以有所提高。盖板212上可以设置有如电极端子等的功能性部件。电极端子可以用于与电极组件22电连接,以用于输出或输入电池单体
20的电能。盖板212的材质也可以是多种的,比如,铜、铁、铝、不锈钢、铝合金、塑胶等,本申请实施例对此不作特殊限制。在一些实施例中,在盖板212的内侧还可以设置有绝缘结构,绝缘结构可以用于隔离壳体211内的电连接部件与盖板212,以降低短路的风险。示例性的,绝缘结构可以是塑料、橡胶等。
电极组件22是电池单体20中发生电化学反应的部件。壳体211内可以包含一个或更多个电极组件22。电极组件22主要由正极极片和负极极片卷绕或层叠放置形成,并且通常在正极极片与负极极片之间设有隔离膜,隔离膜用于分隔正极极片和负极极片,以避免正极极片和负极极片内接短路。正极极片和负极极片具有活性物质的部分构成电极组件的主体部,正极极片和负极极片不具有活性物质的部分各自构成极耳。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中,正极活性物质和负极活性物质与电解液发生反应,极耳连接电极端子以形成电流回路。
相关技术中,方形的扁平状的电池中,泄压机构一般设置于宽度较窄的侧壁上,一方面,侧壁上还设置有电极端子,泄压机构可能会出现为了避免和电极端子发生干涉导致面积受限的问题,另一方面,即使设置有泄压机构的侧壁上不设置有电极端子,由于侧壁整体较窄,泄压机构的面积仍然会受到限制,从而导致电池热失控时的排气不顺畅。
另外,由于泄压机构设置于宽度较窄的侧壁,因此在该侧壁上加工泄压机构(例如,通过激光蚀刻的方式加工出的泄压刻痕)时,加工难度较大,从而导致制造成本也得到了提升。
为此,本申请提升了一种电池单体,该电池单体的泄压刻痕围成的面积不会受到限制,且加工难度得到了降低。
根据本申请实施例的电池单体可以包括外壳21和泄压刻痕213。
如图3、图4和图7所示,所示,外壳21可以将电池单体的外部环境和内部环境隔离,外壳21可以为金属件,当然也可以为绝缘件。
外壳21可以限定出容纳空间,容纳空间内可以容置有电极组件以及用于浸润电极组件的电解液。
本申请实施例中的外壳21呈扁平状,因此外壳21具有大面侧壁和小面侧壁,大面侧壁一般具有两个且在外壳21的厚度方向上相对,两个大面侧壁之间通过小面侧壁连接。外壳21构造为扁平状,可以使得多个电池单体沿厚度方向上堆叠,方便多个电池电梯存储和安装。
在本申请的一些实施例中,沿外壳21的厚度方向,外壳21包括两个彼此相对的第一壁212a。
可以理解的是,由于外壳21为扁平状,因此外壳21的厚度方向上的尺寸小于外壳21的宽度方向上的尺寸,外壳21的厚度方向上的尺寸小于外壳21的长度方向上的尺寸。
两个第一壁212a在外壳21的厚度方向上相对,因此第一壁212a的外表面的面积大于其余侧壁的面积。因此,设置于外表面面积最大的第一壁212a上的泄压刻痕213围成的面积不会受到限制,可以根据需要加工合适面积的泄压刻痕213,此外在外表面面积最大的第一壁212a上设置泄压刻痕213,可以使得加工泄压刻痕213更加容易,从而降低了泄压刻痕213的制造成本。
在本申请的一些实施例中,泄压刻痕213设置于至少一个第一壁212a。也就是说,两个第一壁212a中可以只有一个设置有泄压刻痕213,或者两个第一壁212a中的每一个都设置有泄压刻痕213。
第一壁212a上设置泄压刻痕213部分的结构强度相较于其他部分的结构强度要小,因此在电池单体发生热失控后,泄压刻痕213会率先撕裂,从而将外壳21内的高压气体迅速排除。
泄压刻痕213一般为凹槽结构,泄压刻痕213的横截面形状可以为半圆形、梯形或者其他形状,本申请不对泄压刻痕213的横截面的具体形状进行限定。
根据本申请实施例的电池单体,外壳21为扁平状,通过将泄压刻痕213设置于在壳体的厚
度方向上相对的两个第一壁212a中的至少一个上,使得泄压刻痕213围成的面积不会受到限制,可以自由地选择泄压刻痕213围成的面积以及泄压刻痕213的设置位置,同时由于第一壁212a的外表面的面积较大,因此泄压刻痕213的加工更加容易,且制造成本得到了降低。
在本申请的一些实施例中,如图9所示,泄压刻痕213为封闭的环形结构。也就是说,泄压刻痕213是连续的、首尾连接的结构,该泄压刻痕213上没有开口。由此,外壳21上设置有泄压刻痕213部分的结构强度更加均匀,在电池单体发生热失控时,其耐高温和耐高压的能力也得到了提升。
泄压刻痕213的形状可以为圆形、跑道形、多边形或者其他异形结构,只要是首尾连接的环形结构,均在本申请的保护范围内。
在本申请的一些实施例中,如图4、图6和图7所示,泄压刻痕213为未封闭的环形结构。也就是说,泄压刻痕213并非首尾相接,泄压刻痕213在长度方向上的两端间隔开,从而泄压刻痕213上设置有开口。由此,在电池单体发生热失控后,裂痕可以沿着泄压刻痕213的延伸方向撕裂,同时由于开口的存在,裂痕可以沿着开口的朝向撕裂外壳21,从而使得裂痕的撕裂方向和撕裂范围可控,实现局部开阀,降低了大范围撕裂外壳21的几率,裂痕的撕裂方向和撕裂范围均可控,减少了由于裂痕的不可控对电池单体造成的损害,也减少由于裂痕不可控导致高压气体无序排出、对其他电池单体造成的影响。
在本申请的一些实施例中,如图4和图7所示,泄压刻痕213设置于第一壁212a的中心区域。由此,泄压刻痕213围成的面积可以根据需要进行选择。另外,将泄压刻痕213设置于第一壁212a的中心位置,可以使得加工更加容易,降低泄压刻痕213的加工成本。
根据本申请的一些实施例,如图6所示,泄压刻痕213设置于第一壁212a的边角区域。由此,泄压刻痕213围成的面积不会受到限制,同时在电池单体发生热失控时,裂痕沿着泄压刻痕213撕裂第一壁212a,由于泄压刻痕213设置于第一壁212a的边角区域,因此裂痕可以仅破坏第一壁212a的边角区域,降低裂痕将第一壁212a大范围破坏的几率。
在本申请的一些实施例中,如图5所示,泄压刻痕213包括圆弧段201,顾名思义,圆弧段201不是一个完整的圆,而是某一圆的圆心角对应的弧线段。圆弧段201的圆心角以及半径可以根据需要进行调整。
圆弧段201具有第一端和第二端,第一端和第二端为圆弧段201在长度方向上的两端。
泄压刻痕213还包括第一延长段202,第一延长段202可以为直线段、弧线段或者其他异形线段(例如,蛇形等),此处不对第一延长段202的具体类型进行限定。
第一延长段202可以与第一端连接,且第一延长段202可以从第一端向靠近圆弧段201的中轴线201a的方向延伸。
需要说明的是,圆弧段201的中轴线201a可以将圆弧段201分为两个子圆弧段,且两个子圆弧段关于圆弧段201的中轴线201a对称。
由此,第一延长段202朝向远离圆弧段201的方向延伸的延长线会最终与圆弧段201的中轴线201a相交。
泄压刻痕213还包括第二延长段203,第二延长段203可以为直线段、弧线段或者其他异形线段(例如,蛇形等),此处不对第二延长段203的具体类型进行限定。
第二延长段203可以与第二端连接,且第二延长段203可以从第二端向靠近圆弧段201的中轴线201a的方向延伸。
由此,第二延长段203朝向远离圆弧段201的方向延伸的延长线会最终与圆弧段201的中轴线201a相交。
第一延长段202和第二延长段203也可以关于圆弧段201的中轴线201a对称,当然第一延长段202和第二延长段203也可以关于圆弧段201的中轴线201a不对称,只要保证第一延长段
202从第一端向靠近圆弧段201的中轴线201a的方向延伸、第二延长段203从第二端向靠近圆弧段201的中轴线201a的方向延伸即可。
根据本申请实施例的电池单体20,泄压刻痕213包括圆弧段201、第一延长段202和第二延长段203,通过将第一延长段202从第一端向靠近圆弧段201的中轴线201a的方向延伸、第二延长段203从第二端向靠近圆弧段201的中轴线201a的方向延伸,从而圆弧段201可以减少泄压刻痕213在加工时的应力集中,在电池单体20发生热失控、且内部高压气体将泄压刻痕213撕裂时,第一延长段202和第二延长段203可以引导裂痕向靠近圆弧段201的中轴线201a的方向靠近,从而第一延长段202和第二延长段203可以引导外壳21上的裂痕逐渐收敛,使得外壳21上被撕裂的部位的尺寸可控,当然第一延长段202和第二延长段203还可以使得裂痕的撕裂方向可控,由此在电池单体20发生热失控且泄压刻痕213被撕裂后,可以实现局部开阀,降低了大范围撕裂外壳21的几率,裂痕的撕裂方向和撕裂范围均可控,减少了由于裂痕的不可控对电池单体20造成的损害,也减少由于裂痕不可控导致高压气体无序排出、对其他电池单体20造成的影响。
在本申请的一些实施例中,如图5所示,圆弧段201的圆心角为α,满足:180°≤α<360°。例如,圆心角可以为180°、200°、220°、240°、260°、280°、300°、320°、340°、350°。
本申请不对圆弧段201的圆心角的具体数值进行限定,只要保证圆弧段201的圆心角位于上述范围内即可。
当α≥180°时,圆弧段201围设的面积足够,从而在电池单体20发生热失控时,裂痕沿着圆弧段201撕裂外壳21,在圆弧段201上的裂痕可以使外壳21内的高压气体快速排出;当α<360°时,泄压刻痕213为未封闭的环形结构,泄压刻痕213上具有开口,从而裂痕可以沿着开口的朝向撕裂外壳,使得裂痕的撕裂方向和撕裂范围可控,进而实现裂痕在外壳21上局部开阀。当180°≤α<360°时,既可以使沿着圆弧段201撕裂的裂痕范围足够、外壳21内的高压气体能够快速排出,同时泄压刻痕213上具有开口,可以引导裂痕的撕裂方向和撕裂范围,实现裂痕在外壳21上局部开阀。
在本申请的一些实施例中,210°≤α≤330°。例如,圆弧段201的圆心角为α可以为210°、240°、245°、250°、255°、260°、265°、270°、275°、280°、285°、290°、295°、300°、330°。
当α≥210°时,圆弧段201的围设的面积进一步提升,从而在电池单体20发生热失控时,裂痕沿着圆弧段201撕裂外壳21,裂痕的撕裂范围可以使外壳21内的高压气体更加快速地排出;当α≤330°时,泄压刻痕213为未封闭的环形结构,泄压刻痕213上具有开口且开口范围更大,从而裂痕可以沿着开口的朝向撕裂外壳,不仅裂痕的撕裂方向和撕裂范围可控,且裂痕的撕裂范围更大,进而外壳21内的高压气体可以更加快速地排出。当210°≤α≤330°时,可以进一步提升外壳21内的高压气体的排出速度,同时圆弧段201上具有的开口尺寸更大,从而可以引导裂痕在外壳21的撕裂范围更大,从而开口不仅可以引导裂痕的撕裂方向和撕裂范围,也进一步提升外壳21内的高压气体的排出速度。
在本申请的一些实施例中,如图5所示,第一延长段202可以与圆弧段201相切。也就是说,第一延长段202与第一端的切线重合。由此,圆弧段201上的裂痕可以非常顺畅地沿着圆弧段201的第一端处的切线延伸、撕裂,减少裂痕撕裂过程的阻碍,使得裂痕撕裂更加顺畅、可控,减少撕裂过程中的应力集中。
可以理解的是,第一延长段202可以弧线段、也可以为直线段,本申请不对第一延长段202的线段类型进行限定,只要保证第一延长段202与圆弧段201相切即可。
在本申请的一些实施例中,如图5所示,第二延长段203可以与圆弧段201相切。也就是说,第二延长段203与第二端的切线重合。由此,圆弧段201上的裂痕可以非常顺畅的沿着圆弧段201的第二端处的切线延伸、撕裂,减少裂痕撕裂过程的阻碍,使得裂痕撕裂更加顺畅、可控,减少撕裂过程中的应力集中。
可以理解的是,第二延长段203可以弧线段、也可以为直线段,本申请不对第二延长段203
的线段类型进行限定,只要保证第二延长段203与圆弧段201相切即可。
根据本申请的一些实施例,如图5所示,第一延长段202为直线段。将第一延长段202构造为直线段,一方面可以第一延长段202的加工更加容易,另一方面,裂痕在直线段上的撕裂过程更加顺畅,或者说,直线段可以更好地引导裂痕沿预设方向撕裂,从而使得裂痕的撕裂方向和撕裂范围更加可控。
根据本申请的一些实施例,第二延长段203为直线段。将第二延长段203构造为直线段,一方面可以第二延长段203的加工更加容易,另一方面,裂痕在直线段上的撕裂过程更加顺畅,或者说,直线段可以更好地引导裂痕沿预设方向撕裂,从而使得裂痕的撕裂方向和撕裂范围更加可控。
在本申请的一些实施例中,如图4和图5所示,第一延长段202远离圆弧段201的一端和第二延长段203远离圆弧段201的一端间隔开以形成第一开口201c。也就是说,第一延长段202远离圆弧段201的一端和第二延长段203远离圆弧段201的一端彼此不连接,从而确保泄压刻痕213为未封闭的状态。
一般来说,第一开口201c的朝向直接影响裂痕的撕裂方向,例如,若第一开口201c朝向第一壁212a的边角,那么在电池单体20热失控后、高压气体会撕裂泄压刻痕213,且裂痕可以沿着第一开口201c朝向边角的方向撕裂,从而可以调整第一开口201c的朝向来调整裂痕的撕裂方向。
在本申请的一些实施例中,如图6所示,泄压刻痕213设置于第一壁212a的边角区域。将泄压刻痕213设置于第一壁212a的边角区域,在电池单体20发生热失控时,裂痕可以在泄压刻痕213的引导下撕裂外壳21,由于泄压刻痕213设置于第一壁212a的边角区域,因此裂痕的撕裂区域也主要集中在第一壁212a的边角区域,从而可以减少裂痕对第一壁212a的其他区域的破坏几率,使得电池单体20在发生热失控后,外壳21的回收成为可能。
在本申请的一些实施例中,泄压刻痕213上的第一开口201c朝向第一壁212a的边角。由此,裂痕在沿着泄压刻痕213撕裂外壳21时,可以沿着第一开口201c的朝向撕裂,及裂痕的撕裂方向朝向第一壁212a的边角,从而降低了裂痕朝向第一壁212a的中间区域移动的几率,降低了第一壁212a被完全撕裂的几率,使得外壳21可以被回收利用。
在本申请的一些实施例中,如图5所示,圆弧段201a的半径为R,满足:1mm≤R≤20mm。
例如,圆弧段201a的半径可以为1mm、3mm、5mm、7mm、9mm、11mm、13mm、15mm、17mm、19mm、20mm。
本申请不对圆弧段201a的半径的具体数值进行限定,只要圆弧段201a的半径处于上述范围内,均在本申请的保护范围内。
当R≥1mm时,裂痕沿圆弧段201a撕裂后,能够满足电池单体20在热失控时的泄压需求;当R≤20mm时,圆弧段201a的范围不至于过大,从而使得外壳21的整体的结构强度满足要求。当1mm≤R≤20mm,既可以满足电池单体20在热失控时的泄压需求,另外也可以使得泄压刻痕213的范围不至于过大、外壳21整体的结构强度符合要求。
在本申请的一些实施例中,如图4所示,直线段的长度为S1,满足:0<S1≤20mm。例如,直线段的长度可以为1mm、3mm、5mm、7mm、9mm、11mm、13mm、15mm、17mm、19mm、20mm。
需要说明的是,直线段的长度即为第一延长段202构造为直线时的长度、或者第二延长段203为直线时的长度。
本申请不对直线段的长度进行限定,只要直线段的半径处于上述范围内,均在本申请的保护范围内。
当S1>0时,裂痕沿直线段撕裂后,能够满足电池单体20在热失控时的泄压需求;当S1≤20mm时,直线段的范围不至于过大,从而使得外壳21的整体的结构强度满足要求。当0<S1≤20mm,既可以满足电池单体20在热失控时的泄压需求,另外也可以使得泄压刻痕213的范围不至
于过大影响外壳21整体的结构强度。
在本申请的一些实施例中,0<S1/R≤2。例如,S1/R可以为0.05、0.1、0.15、0.2、0.25、0.3、0.35、0.4、0.45、0.5、0.55、0.6、0.7、0.8、0.9、1.0、1.1、1.2、1.3、1.4、1.5、1.6、1.7、1.8、1.9、2.0。
本申请不对S1/R的具体数值进行限定,只要S1/R处于上述范围,均在本申请的保护范围内。
S1/R表征直线段相对于弧线段的半径延伸的程度,S1/R越大,则表示直线段相较于弧线段的半径延伸的越多,S1/R越小,则表示直线段相较于弧线段的半径延伸的越小。
当S1/R>0时,直线段可以从弧线段的一端延伸,直线段可以引导裂痕撕裂外壳21,裂痕沿直线段撕裂后,能够满足电池单体20在热失控时的泄压需求;当S1/R≤2,从而直线段的长度不至于过长,从而控制泄压刻痕213的范围,使得外壳21的整体的结构强度满足要求。当0<S1/R≤2时,既可以保证直线段具有足够的长度来引导裂痕的撕裂方向和撕裂范围,同时也缓解了由于直线段延伸的过长导致泄压刻痕213的范围过大而对外壳21的结构强度产生过多的负面影响。
根据本申请的一些实施例,如图6所示,第一壁212a包括第一边缘212a1和第二边缘212a2,第一边缘212a1和第二边缘212a2相交以形成第一壁212a的一个边角。
泄压刻痕213的中心与第一边缘212a1之间的最短距离为S2,第二边缘212a2的长度为S,满足:0<S2<S/2;
泄压刻痕213的中心与第二边缘212a2之间的最短距离为T1,第一边缘212a1的长度为T,满足:0<T1<T/2。
由此,泄压刻痕213的中心靠近第一边缘212a1和第二边缘212a2限定出的一个边角。从而裂痕的撕裂区域也主要集中在第一壁212a的边角区域,从而可以减少裂痕对第一壁212a的其他区域的破坏几率,使得电池单体20在发生热失控后,外壳21的回收成为可能。
在本申请的一些实施例中,如图6所示,第一延长段202远离圆弧段201a的一端与第一边缘212a1之间的最短距离为S3,第二边缘212a2的长度为S,满足:0<S3<S/2;第二延长段203远离圆弧段201a的一端与第二边缘212a2之间的最短距离为T2,第一边缘212a1的长度为T,满足:0<T2<T/2。
第一延长段202远离圆弧段201a的一端与第二延长段203远离圆弧段201a的一端间隔开从而形成第一开口201c,由于第一延长段202远离圆弧段201a的一端与第一边缘212a1之间的最短距离与第二边缘212a2的长度满足上述条件,第二延长段203远离圆弧段201a的一端与第二边缘212a2之间的最短距离与第一边缘212a1的长度满足上述条件,因此第一开口201c朝向第一边缘212a1和第二边缘212a2限定出的边角。
从而,裂痕在沿着泄压刻痕213撕裂外壳21时,可以沿着第一开口201c的朝向撕裂,即裂痕的撕裂方向朝向第一壁212a的边角,从而降低了裂痕朝向第一壁212a的中间区域移动的几率,降低了第一壁212a被完全撕裂的几率,使得外壳21可以被回收利用。
在本申请的一些实施例中,如图7-图9所示,泄压刻痕213可以构造为跑道形结构,泄压刻痕213可以包括第一弧线段204、第二弧线段205、第一直线段206和第二直线段207。第一弧线段204和第二弧线段205的圆心角可以均为180°,第一弧线段204和第二弧线段205在第一方向X上间隔设置,第一弧线段204和第二弧线段205朝向远离彼此的方向凸出,也就是说,第一弧线段204形成的开口和第二弧线段205形成的开口朝向彼此。
第一直线段206和第二直线段207在第二方向Y上间隔开,第一直线段206连接在第一弧线段204和第二弧线段205在第二方向Y上的同向一端,第二直线段207连接在第一弧线段204和第二弧线段205在第二方向Y上的同向另一端,第一方向X和第二方向Y彼此垂直。
由此第一弧线段204、第一直线段206、第二弧线段205和第二直线段207形成了跑道形结
构,且第一弧线段204、第一直线段206、第二弧线段205和第二直线段207可以通过激光依次蚀刻而成。
在本申请的一些实施例中,第一直线段206或第二直线段207的长度为L1,满足:1mm≤L1≤40mm。例如,第一直线段206或第二直线段207的长度可以为1mm、4mm、8mm、12mm、16mm、20mm、24mm、28mm、32mm、36mm、40mm。本申请不对第一直线段206或第二直线段207的长度的具体数值进行限定,只要保证第一直线段206或第二直线段207的长度满足上述范围,则均在本申请的保护范围内。
当L1≥1mm时,在电池单体20发生热失控后,裂痕沿着泄压刻痕213撕裂外壳21后,外壳21内的高温高压气体可以被迅速排出,当L1≤40mm,泄压刻痕213的整体尺寸不会过大,从而使得外壳21的整体结构强度满足要求。当1mm≤L1≤40mm时,既可以使得电池单体20发生热失控后外壳21内的气体被快速排出,同时外壳21的整体结构强度也满足要求。
在本申请的一些实施例中,第一直线段206或第二直线段207的长度为L1,满足:5mm≤L1≤30mm。例如,第一直线段206或第二直线段207的长度可以为5mm、7mm、10mm、13mm、15mm、17mm、20mm、23mm、25mm、27mm、30mm。本申请不对第一直线段206或第二直线段207的长度的具体数值进行限定,只要保证第一直线段206或第二直线段207的长度满足上述范围,则均在本申请的保护范围内。
当L1≥5mm时,在电池单体20发生热失控后,裂痕沿着泄压刻痕213撕裂外壳21后,外壳21内的高温高压气体可以被更加迅速地排出,当L1≤30mm,泄压刻痕213的整体尺寸不会过大,从而使得外壳21的整体结构强度可以进一步满足要求。当5mm≤L1≤30mm时,既可以使得电池单体20发生热失控后外壳21内的气体被更加快速地排出,同时外壳21的整体结构强度也进一步满足要求。
在本申请的一些实施例中,在第二方向Y上,第一直线段206和第二直线段207之间的距离为W1,满足:1mm≤W1≤40mm。第一直线段206和第二直线段207可以均沿第一方向X延伸,从而第一直线段206和第二直线段207彼此平行。例如,第一直线段206和第二直线段207之间的距离可以为1mm、5mm、10mm、15mm、20mm、25mm、30mm、35mm、40mm。本申请不对第一直线段206和第二直线段207之间的距离的具体数值进行限定,只要保证第一直线段206和第二直线段207之间的距离满足上述范围,即在本申请的保护范围内。
当W1≥1mm时,在电池单体20发生热失控后,裂痕沿着泄压刻痕213撕裂外壳21后,外壳21内的高温高压气体可以被迅速排出,当W1≤40mm,泄压刻痕213的整体尺寸不会过大,从而使得外壳21的整体结构强度满足要求。当1mm≤W1≤40mm时,既可以使得电池单体20发生热失控后外壳21内的气体被快速排出,同时外壳21的整体结构强度也满足要求。
在本申请的一些实施例中,在第二方向Y上,第一直线段206和第二直线段207之间的距离为W1,满足:1mm≤W1≤10mm。第一直线段206和第二直线段207可以均沿第一方向X延伸,从而第一直线段206和第二直线段207彼此平行。例如,第一直线段206和第二直线段207之间的距离可以为1mm、2mm、3mm、4mm、5mm、6mm、7mm、8mm、9mm、10mm。本申请不对第一直线段206和第二直线段207之间的距离的具体数值进行限定,只要保证第一直线段206和第二直线段207之间的距离满足上述范围,即在本申请的保护范围内。
当W1≥1mm时,在电池单体20发生热失控后,裂痕沿着泄压刻痕213撕裂外壳21后,外壳21内的高温高压气体可以被迅速排出,当W1≤10mm,泄压刻痕213的整体尺寸不会过大,从而使得外壳21的整体结构强度进一步满足要求。当1mm≤W1≤10mm时,既可以使得电池单体20发生热失控后外壳21内的气体被快速排出,同时外壳21的整体结构强度也进一步满足要求。
在本申请的一些实施例中,如图8所示,第一直线段206包括第一子段206a和第二子段206b,第一子段206a的一端与第一弧线段204连接,第二子段206b的一端与第二弧线段205连接,第一子段206a的另一端与第二子段206b的另一端间隔设置以形成第二开口208。也就是说,泄压刻痕213虽然也为跑道形结构,但是并非为封闭的跑道形结构,第一直线段206上设置有未封闭的区域。从而可以实现外壳21上进行局部开阀,电池单体20的内部出现热失控时,气体可以沿
着泄压刻痕213撕裂外壳21,同时第二开口208所在的区域不会与外壳21断开,而是引导气体继续撕裂外壳21,直到达到想要的撕裂效果。也就是说,第二开口208可以引导裂痕的撕裂方向,使得裂痕的撕裂方向和撕裂范围可控。
在本申请的一些实施例中,泄压刻痕213的长度为L,第一子段206a和第二子段206b在第一方向X上间隔的距离为L2,满足:0.05≤L2/L≤0.8。例如,第一子段206a和第二子段206b在第一方向X上间隔的距离与泄压刻痕213的长度的比值可以为0.05、0.1、0.15、0.2、0.25、0.3、0.35、0.4、0.45、0.5、0.55、0.6、0.65、0.7、0.75、0.8。本申请不对第一子段206a和第二子段206b在第一方向X上间隔的距离与泄压刻痕213的长度的比值的具体数值进行限定,只要第一子段206a和第二子段206b在第一方向X上间隔的距离与泄压刻痕213的长度的比值满足上述范围,即在本申请的保护范围内。
当L2/L≥0.05时,第二开口208引导裂痕撕裂外壳21,使得在电池单体20在发生热失控后,外壳21内的气体可以被迅速排出;当L2/L≤0.8,可以使得裂痕沿第二开口208的朝向撕裂外壳21时,撕裂的范围不至于过大,降低外壳21被大范围破坏的几率。当0.05≤L2/L≤0.8时,既可以在电池单体20发生热失控后,外壳21内的气体能够迅速地向外排出,同时也降低了外壳21被大范围破坏的几率。
在本申请的一些实施例中,泄压刻痕213的长度为L,第一子段206a和第二子段206b在第一方向X上间隔的距离为L2,满足:0.05≤L2/L≤0.4。例如,第一子段206a和第二子段206b在第一方向X上间隔的距离与泄压刻痕213的长度的比值可以为0.05、0.08、0.12、0.16、0.2、0.24、0.28、0.32、0.4。本申请不对第一子段206a和第二子段206b在第一方向X上间隔的距离与泄压刻痕213的长度的比值的具体数值进行限定,只要第一子段206a和第二子段206b在第一方向X上间隔的距离与泄压刻痕213的长度的比值满足上述范围,即在本申请的保护范围内。
当L2/L≥0.05时,第二开口208引导裂痕撕裂外壳21,使得在电池单体20在发生热失控后,外壳21内的气体可以被迅速排出;当L2/L≤0.4,可以使得裂痕沿第二开口208的朝向撕裂外壳21时,撕裂的范围不至于过大,进一步降低外壳21被大范围破坏的几率。当0.05≤L2/L≤0.4时,既可以在电池单体20发生热失控后,外壳21内的气体能够迅速地向外排出,同时也进一步降低了外壳21被大范围破坏的几率。
在本申请的一些实施例中,如图3所示,外壳21包括壳体211和盖板212,壳体211包括底壁211a和周侧壁211b,周侧壁211b的一端与底壁211a的外周沿连接,周侧壁211b的另一端围成开口,盖板212封闭开口,其中第一壁212a为盖板212或者底壁211a。
也就是说,外壳21由两个分体部件-壳体211和盖板212共同形成,壳体211和盖板212可以为金属件,二者可以通过焊接的方式固定在一起。第一壁212a为盖板212或底壁211a,因此泄压刻痕201设置于盖板212或底壁211a上,例如若电池单体20为扁平状,且盖板212和底壁211a在厚度方向上相对,因此泄压刻痕201设置于外壳21的大面上。
在本申请的一些实施例中,外壳21为不锈钢材质,泄压刻痕201可以通过激光蚀刻的方式加工成型。当然,泄压刻痕201也可以通过冲压的方式成型,本申请不对泄压刻痕201的成型方式进行限定。
在本申请的一些实施例中,泄压刻痕201的横截面的形状可以为梯形,梯形的平行的两个边中较长的边位于泄压刻痕201的凹槽的开口203处,平行的两个边中较短的边的边长可以为0.05mm-1.0mm,梯形的底部角度(梯形凹槽的底壁与周壁之间的角度)可以为30°-60°。
泄压刻痕201的横截面为梯形,一致性更好,应力集中会小。当然,泄压刻痕201的横截面还可以为三角形、圆弧形或者矩形。
下面简单描述本申请实施例的电池。
根据本申请实施例的电池包括上述实施例的电池单体20,由于根据本申请实施例的电池设置有上述的电池单体20,因此电池的加工更加容易,且制造成本得到了降低。
下面简单描述本申请实施例的用电设备。
根据本申请实施例的用电设备包括上述的电池,由于根据本申请实施例的用电设备设置有上述的电池,因此该用电设备的制造难度和加工成本得到了降低。
虽然已经参考优选实施例对本申请进行了描述,但在不脱离本申请的范围的情况下,可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是,只要不存在结构冲突,各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例,而是包括落入权利要求的范围内的所有技术方案。
Claims (22)
- 一种电池单体,其特征在于,包括:外壳,所述外壳呈扁平状,沿所述外壳的厚度方向,所述外壳包括两个彼此相对的第一壁;泄压刻痕,所述泄压刻痕设置于至少一个所述第一壁。
- 根据权利要求1所述的电池单体,其特征在于,所述泄压刻痕为封闭的环形结构。
- 根据权利要求1或2所述的电池单体,其特征在于,所述泄压刻痕为未封闭的环形结构。
- 根据权利要求1-3中任一项所述的电池单体,其特征在于,所述泄压刻痕位于所述第一壁的中心区域。
- 根据权利要求1-4中任一项所述的电池单体,其特征在于,所述泄压刻痕设置于所述第一壁的边角区域。
- 根据权利要求1-5中任一项所述的电池单体,其特征在于,所述泄压刻痕包括圆弧段、第一延长段和第二延长段,所述圆弧段具有第一端和第二端,所述第一延长段从所述第一端向靠近所述圆弧段的中轴线的方向延伸,所述第二延长段从所述第二端向靠近所述圆弧段的中轴线的方向延伸。
- 根据权利要求6所述的电池单体,其特征在于,所述圆弧段的圆心角为α,满足:180°≤α<360°。
- 根据权利要求6或7所述的电池单体,其特征在于,所述第一延长段与所述圆弧段相切;和/或所述第二延长段与所述圆弧段相切。
- 根据权利要求6-8中任一项所述的电池单体,其特征在于,所述第一延长段为直线段;和/或所述第二延长段为直线段。
- 根据权利要求6-9中任一项所述的电池单体,其特征在于,所述第一延长段远离所述圆弧段的一端和所述第二延长段远离所述圆弧段的一端间隔开以形成第一开口。
- 根据权利要求10所述的电池单体,其特征在于,所述泄压刻痕设置于所述第一壁的边角区域且所述第一开口朝向所述第一壁的边角。
- 根据权利要求1-11中任一项所述的电池单体,其特征在于,所述泄压刻痕包括:第一弧线段和第二弧线段,所述第一弧线段和所述第二弧线段在第一方向上间隔设置,所述第一弧线段和所述第二弧线段朝向远离彼此的方向凸出;第一直线段和第二直线段,所述第一直线段连接在所述第一弧线段和所述第二弧线段在第二方向上的同向一端,所述第二直线段连接在所述第一弧线段和所述第二弧线段在所述第二方向上的同向另一端,所述第一方向和所述第二方向彼此垂直。
- 根据权利要求12所述的电池单体,其特征在于,所述第一直线段或所述第二直线段的长度为L1,满足:1mm≤L1≤40mm。
- 根据权利要求13所述的电池单体,其特征在于,满足:5mm≤L1≤30mm。
- 根据权利要求12-14中任一项所述的电池单体,其特征在于,在所述第二方向上,所述第一直线段和所述第二直线段之间的距离为W1,满足:1mm≤W1≤40mm。
- 根据权利要求15所述的电池单体,其特征在于,满足:1mm≤W1≤10mm。
- 根据权利要求12-16中任一项所述的电池单体,其特征在于,所述第一直线段包括第一子段和第二子段,所述第一子段的一端与所述第一弧线段连接,所述第二子段的一端与所述第二弧线段连接,所述第一子段的另一端和所述第二子段的另一端间隔设置以形成第二开口。
- 根据权利要求17所述的电池单体,其特征在于,所述泄压刻痕的长度为L,所述第一子段和所述第二子段在所述第一方向上间隔的距离为L2,满足:0.05≤L2/L≤0.8。
- 根据权利要求18所述的电池单体,其特征在于,满足:0.05≤L2/L≤0.4。
- 根据权利要求1-19中任一项所述的电池单体,其特征在于,所述外壳包括壳体和盖板,所述壳体包括底壁和周侧壁,所述周侧壁的一端与所述底壁的外周沿连接,所述周侧壁的另一端围成开口,所述盖板封闭所述开口;其中所述第一壁为所述盖板或所述底壁。
- 一种电池,其特征在于,包括权利要求1-20中任一项所述的电池单体。
- 一种用电设备,其特征在于,包括如权利要求1-20任一项所述的电池单体或如权利要求21所述的电池,所述电池单体或所述电池用于提供电能。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311641162.9A CN120073171A (zh) | 2023-11-30 | 2023-11-30 | 电池单体、电池和用电设备 |
| CN202311641162.9 | 2023-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025112347A1 true WO2025112347A1 (zh) | 2025-06-05 |
Family
ID=95802695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2024/094614 Pending WO2025112347A1 (zh) | 2023-11-30 | 2024-05-22 | 电池单体、电池和用电设备 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN120073171A (zh) |
| WO (1) | WO2025112347A1 (zh) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115693011A (zh) * | 2022-11-17 | 2023-02-03 | 宁德时代新能源科技股份有限公司 | 外壳部件、电池单体、电池及用电设备 |
| CN115882125A (zh) * | 2022-11-17 | 2023-03-31 | 宁德时代新能源科技股份有限公司 | 外壳部件、电池单体、电池及用电设备 |
| CN115939656A (zh) * | 2022-09-20 | 2023-04-07 | 宁德时代新能源科技股份有限公司 | 外壳、电池单体、电池及用电设备 |
| WO2023160252A1 (zh) * | 2022-02-25 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | 电池和用电装置 |
-
2023
- 2023-11-30 CN CN202311641162.9A patent/CN120073171A/zh active Pending
-
2024
- 2024-05-22 WO PCT/CN2024/094614 patent/WO2025112347A1/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023160252A1 (zh) * | 2022-02-25 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | 电池和用电装置 |
| CN115939656A (zh) * | 2022-09-20 | 2023-04-07 | 宁德时代新能源科技股份有限公司 | 外壳、电池单体、电池及用电设备 |
| CN115693011A (zh) * | 2022-11-17 | 2023-02-03 | 宁德时代新能源科技股份有限公司 | 外壳部件、电池单体、电池及用电设备 |
| CN115882125A (zh) * | 2022-11-17 | 2023-03-31 | 宁德时代新能源科技股份有限公司 | 外壳部件、电池单体、电池及用电设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120073171A (zh) | 2025-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20250337095A1 (en) | Cell, battery, and electric device | |
| US20250391990A1 (en) | Battery cell, battery, and electric device | |
| WO2025055222A1 (zh) | 电池单体、电池及用电装置 | |
| WO2025055433A1 (zh) | 电池单体、电池及用电装置 | |
| WO2025055149A1 (zh) | 电池单体、电池及用电装置 | |
| WO2025055392A1 (zh) | 电池单体、电池及用电装置 | |
| WO2024212491A1 (zh) | 电池单体、电池以及用电装置 | |
| CN220895734U (zh) | 电池单体、电池、用电设备及储能装置 | |
| CN220934236U (zh) | 电池单体、电池、用电设备及储能装置 | |
| WO2024198209A1 (zh) | 电池单体、电池及用电设备 | |
| US20250343332A1 (en) | Battery cell, battery, and electric device | |
| CN221427941U (zh) | 电池单体、电池及用电设备 | |
| WO2024239700A1 (zh) | 电池单体的壳体及制造方法、电池单体、电池及用电装置 | |
| WO2024182938A1 (zh) | 电极组件、电池单体、电池和用电设备 | |
| CN221447209U (zh) | 电极组件、电池单体、电池及用电装置 | |
| WO2024212677A1 (zh) | 电池单体、电池及用电装置 | |
| EP4391185A1 (en) | Housing, battery cell, battery, and electrical device | |
| WO2024178819A1 (zh) | 电池单体、电池及用电设备 | |
| WO2025112347A1 (zh) | 电池单体、电池和用电设备 | |
| WO2025112348A1 (zh) | 电池单体、电池和用电设备 | |
| CN221727353U (zh) | 电池单体、电池和用电设备 | |
| CN221651634U (zh) | 电池单体、电池和用电设备 | |
| CN219739242U (zh) | 电池的端盖组件、电池单体、电池及用电装置 | |
| CN224005971U (zh) | 电池组、电池装置及用电装置 | |
| CN221861770U (zh) | 电池单体、电池、用电设备及储能装置 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24895457 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024895457 Country of ref document: EP |