Plastic member, end cover assembly, battery cell, battery, and electric device

Abstract

A plastic member (23), a battery cell (20), a battery (100), and an electric device, relating to the technical field of batteries. The plastic member (23) comprises: a body (231) which is plate-shaped, wherein the body (231) is provided with a first through hole (202), and the first through hole (202) passes through the body (231) along the thickness direction; and first reinforcing members (232a) which are arranged on the body (231) and protrude from the surface of the body (231), wherein the first reinforcing members (232a) are located around the first through hole (202) and close to the first through hole (202).

Description

Plastic parts, end cap assemblies, battery cells, batteries and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2023224667613 filed on September 12, 2023, entitled “Structural parts, end cover assemblies, battery cells, batteries and electrical equipment”, and claims priority to Chinese patent application No. 2023230184009 filed on November 8, 2023, entitled “Plastic parts, end cover assemblies, battery cells, batteries and electrical equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a plastic part, an end cover assembly, a battery cell, a battery, and an electrical device. Background Art

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0005] Batteries are widely used in portable electronic devices, electric vehicles, power tools, drones, energy storage devices, and other fields. During the battery manufacturing process, the yield rate of battery components is a critical issue. Therefore, improving the yield rate of battery components and reducing the production difficulty of battery components is a pressing technical challenge in battery technology.

[0006] Summary of the Invention

[0007] The present application provides a plastic part, a battery cell, a battery and an electrical device, which can improve the production efficiency of the battery.

[0008] This application is achieved through the following technical solutions:

[0009] In a first aspect, embodiments of the present application provide a plastic part, the demolding efficiency of which is significantly improved.

[0010] According to an embodiment of the present application, the plastic part includes a main body and a first reinforcement. The main body is plate-shaped and is provided with a first through hole. The first through hole penetrates the main body along the thickness direction. The first reinforcement is arranged on the main body and protrudes from the surface of the main body. The first reinforcement is located around the first through hole and close to the through hole.

[0011] In the above solution, by providing a first reinforcement member on the main body, and by positioning the first reinforcement member around and close to the first through-hole, the first reinforcement member not only increases the overall structural strength of the plastic part, but most importantly, significantly enhances the structural strength of the area surrounding the first through-hole. Consequently, when force is applied to the area surrounding the first through-hole, such as when an ejector pin abuts against the area surrounding the first through-hole to effect demolding, the deformation of the area surrounding the first through-hole and even the overall deformation of the plastic part are reduced, thereby facilitating smooth demolding of the plastic part by the ejector pin and improving demolding efficiency.

[0012] According to some embodiments of the present application, the thickness of the body is t, which satisfies the following conditions: 0.1 mm ≤ t ≤ 1.0 mm. Keeping the body thickness within this range can reduce the overall thickness of the plastic component and the ratio of the volume of the plastic component to the space occupied by the battery cell, thereby increasing the energy density of the battery cell.

[0013] According to some embodiments of the present application, the following condition is satisfied: 0.1mm≤t≤0.6mm. By setting the thickness of the body within the above range, the overall thickness of the plastic part can be reduced, and the ratio of the volume of the plastic part to the space occupied by the battery cell can be reduced, thereby increasing the energy density of the battery cell.

[0014] According to some embodiments of the present application, the first reinforcement members are configured in a plurality and are spaced apart along the circumference of the first through hole. This not only improves the structural strength of the area around the first through hole on the body, but also makes the structural strength of the area around the first through hole on the body more consistent.

[0015] According to some embodiments of the present application, the first reinforcement member is an arc-shaped reinforcement rib. Compared with a linear reinforcement rib, the arc-shaped reinforcement rib can better improve the structural strength around the first through hole in the body.

[0016] According to some embodiments of the present application, the arc-shaped reinforcement rib has a first opening, and the first opening is arranged away from the first through hole, thereby further improving the structural strength of the area around the first through hole on the body.

[0017] According to some embodiments of the present application, the arcuate reinforcing rib has an radian of α, satisfying the following conditions: 90° ≤ α ≤ 270°. This radian of the arcuate reinforcing rib, when in the aforementioned range, not only increases the structural strength of the area surrounding the first through hole in the body, but also reduces the difficulty of machining the partially enclosed arcuate reinforcing rib, thereby improving the production efficiency of the plastic part.

[0018] According to some embodiments of the present application, 135°≤α≤225°. The curvature of the arc-shaped reinforcement rib satisfies the above range, which not only increases the structural strength of the area around the first through hole on the body, but also reduces the difficulty of processing the incompletely enclosed arc-shaped reinforcement rib, thereby improving the production efficiency of the plastic part.

[0019] According to some embodiments of the present application, the radius of the arc-shaped reinforcement rib is R1, which satisfies the following conditions: 0.5mm≤R1≤5mm. Satisfying the above conditions for the radius of the arc-shaped reinforcement rib not only reduces the area occupied by the arc-shaped reinforcement rib on the body, but also, combined with the above-mentioned condition that the curvature of the arc-shaped reinforcement rib is α, makes the overall structure of the arc-shaped reinforcement rib more compact. Compared with larger arc-shaped reinforcement ribs, more compact arc-shaped reinforcement ribs can further improve the structural strength of the area around the first through hole of the body.

[0020] According to some embodiments of the present application, 1mm≤R1≤4mm. The radius of the curved reinforcement rib satisfies the above conditions, which not only reduces the area occupied by the curved reinforcement rib on the body, but also, combined with the above-mentioned condition that the curvature of the curved reinforcement rib is α, makes the overall structure of the curved reinforcement rib more compact. Compared with larger curved reinforcement ribs, more compact curved reinforcement ribs can further improve the structural strength of the area around the first through hole of the body.

[0021] According to some embodiments of the present application, the radius of the arc-shaped reinforcing rib is R1, and the radius of the first through hole is R2, satisfying the following relationship: 0.06≤R1 / R2≤1.67. This eliminates the problem of the radius of the arc-shaped reinforcing rib being too small compared to the radius of the first through hole, resulting in a large number of arc-shaped reinforcing ribs being required to maintain roughly consistent strength in the area surrounding the first through hole on the main body, which would also increase the difficulty of processing the plastic part. Furthermore, the problem of the radius of the arc-shaped reinforcing rib being too small compared to the radius of the first through hole, resulting in only a small number of arc-shaped reinforcing ribs being required in the area surrounding the first through hole on the main body, resulting in inconsistent strength in the area surrounding the first through hole, is also eliminated.

[0022] According to some embodiments of the present application, 0.2 ≤ R1 / R2 ≤ 1. Thus, the problem of the radius of the curved reinforcing rib being too small compared to the radius of the first through hole, which would require a large number of curved reinforcing ribs to maintain roughly uniform strength in the area around the first through hole on the main body, and which would also increase the difficulty of processing the plastic part, will not occur. Furthermore, the problem of the radius of the curved reinforcing rib being too small compared to the radius of the first through hole, which would require only a small number of curved reinforcing ribs to be placed in the area around the first through hole on the main body, and thus lead to inconsistent strength in the area around the first through hole, will not occur.

[0023] According to some embodiments of the present application, the main body is provided with an ejector pin-fitting area, the ejector pin-fitting area being adjacent to the first through-hole, and the arc-shaped reinforcement rib being located between the ejector pin-fitting area and the through-hole. Thus, the arc-shaped reinforcement rib not only enhances the strength of the area surrounding the first through-hole on the main body, but also enhances the structural strength of the ejector pin-fitting area, making it less susceptible to deformation when subjected to the push force of the ejector pin, thereby improving the demolding efficiency of the plastic part.

[0024] According to some embodiments of the present application, the arc-shaped reinforcement rib extends along the circumference of the ejector fitting area. The arc-shaped first reinforcement member can not only increase the structural strength of the area around the ejector fitting area, but also maintain uniform structural strength of the area around the ejector fitting area.

[0025] According to some embodiments of the present application, the body is provided with a second through-hole for passing a power terminal, the second through-hole extending through the body along the thickness direction; at least a portion of the first reinforcement is located between the first through-hole and the second through-hole; or there are multiple first reinforcements, and at least a portion of each of the multiple first reinforcements is located between the first through-hole and the second through-hole. This improves the overall structural strength of the plastic part and facilitates rapid demolding of the plastic part by the ejection mechanism.

[0026] According to some embodiments of the present application, the body has a first surface in the thickness direction; the plastic part further includes a convex portion protruding from the first surface, the convex portion being configured to abut the electrode assembly, and the first through-hole being adjacent to the convex portion. Because the first through-hole is adjacent to the convex portion in the middle region of the plastic part, the structural strength of the area between the first through-hole and the convex portion in the middle region of the plastic part is not significantly reduced.

[0027] According to some embodiments of the present application, the body is provided with a second through hole for the power terminal to pass through, and the first through hole is located between the second through hole and the protrusion. This improves the structural strength of the area around the first through hole and the area around the second through hole.

[0028] According to some embodiments of the present application, the first reinforcement member is disposed on the first surface, and the height of the first reinforcement rib protruding from the first surface is less than the height of the protrusion protruding from the first surface. Thus, the space defined by the protrusion and the body can be fully utilized, and the protruding reinforcement member does not increase the thickness of the structural member.

[0029] According to some embodiments of the present application, the maximum length of the body is a, and the maximum width of the body is b, satisfying the following conditions: 150 mm ≤ a ≤ 500 mm, and 20 mm ≤ b ≤ 150 mm. The plastic component is large and thin, thereby reducing the ratio of the volume of the plastic component to the space occupied by the battery cell, thereby increasing the energy density of the battery cell.

[0030] According to some embodiments of the present application, the following conditions are met: 150 mm ≤ a ≤ 350 mm, 20 mm ≤ b ≤ 100 mm. The plastic part is large and thin, thereby reducing the ratio of the volume of the plastic part to the space occupied by the battery cell, thereby increasing the energy density of the battery cell.

[0031] According to some embodiments of the present application, the second reinforcement is located at the end region and / or the middle region of the body in the longitudinal direction, thereby improving the structural strength of the body except the region near the first through hole and improving the structural strength of the entire plastic part.

[0032] According to some embodiments of the present application, the second reinforcement member includes a first reinforcement rib and a second reinforcement rib, wherein the first reinforcement rib extends in the length direction and the second reinforcement rib extends in the width direction. The intersection of the first reinforcement rib and the second reinforcement rib can further enhance the structural strength of the plastic part and improve the demolding efficiency of the plastic part.

[0033] According to some embodiments of the present application, the body is provided with a second through-hole for passing a power terminal, and one end of the first reinforcing rib extends to the edge of the second through-hole. Thus, the first reinforcing rib can increase the structural strength of the area surrounding the second through-hole, thereby improving the overall structural strength of the plastic part.

[0034] In a second aspect, an embodiment of the present application provides an end cap assembly, comprising an end cap, an electrode terminal and the above-mentioned plastic part, wherein the electrode terminal is mounted on the end cap, the plastic part is arranged on the inner side of the end cap, and a second through hole for the electrode terminal to pass through is provided on the main body.

[0035] According to some embodiments of the present application, the body has a first surface facing away from the end cap, and the first reinforcement member protrudes from the first surface. The height of the first reinforcement member protruding from the first surface is less than or equal to the height of the electrode terminal protruding from the first surface. Thus, the reinforcement member can fully utilize the space defined by the electrode terminal and the body, and the protruding reinforcement member does not increase the thickness of the plastic part. In other words, the provision of the reinforcement member does not reduce the energy density of the battery cell.

[0036] In a third aspect, an embodiment of the present application provides a battery cell comprising the above-mentioned end cover assembly.

[0037] In a fourth aspect, an embodiment of the present application provides a battery comprising the above-mentioned battery cell.

[0038] In a fifth aspect, an embodiment of the present application provides an electrical device comprising the above-mentioned battery.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0041] FIG1 is a schematic diagram of a vehicle provided in a first embodiment of the present application;

[0042] FIG2 is a schematic diagram of a battery provided in the first embodiment of the present application;

[0043] FIG3 is a schematic diagram of a battery cell provided in the first embodiment of the present application;

[0044] FIG4 is a schematic diagram of a plastic part provided in the first embodiment of the present application;

[0045] FIG5 is a schematic diagram of an end cap assembly provided in the first embodiment of the present application in one direction;

[0046] FIG6 is a schematic diagram of the end cap assembly provided by the first embodiment of the present application from another direction;

[0047] FIG7 is a cross-sectional view taken along the AA direction in FIG5;

[0048] FIG8 is a partial enlarged view of circle B in FIG4 .

[0049] 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, shell 211, end cap 212,

[0050] End cap assembly 210, plastic part 23, body 231, first reinforcement 232a, second reinforcement 232b, first reinforcement rib 232b1, second reinforcement rib 232b2, protrusion 233,

[0051] The maximum length of the body is a, the maximum width of the body is b, the thickness of the body is t, the first direction X, the second direction Y,

[0052] First receiving area 201 a , second receiving area 201 b , first through hole 202 , end area 203 , middle area 204 , second through hole 205 , first surface 206 . DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0055] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0057] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0058] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0059] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0060] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0061] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, 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.

[0062] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0063] In the embodiment of the present application, 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.

[0064] 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-acid batteries, and the like.

[0065] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0066] In some embodiments, the positive electrode may be a positive electrode sheet, which 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.

[0067] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0068] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as 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 composite current collector may include a polymer material base layer 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.).

[0069] As an example, 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. However, 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.

[0070] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0071] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium.

[0072] In some embodiments, the negative electrode current collector has two opposite surfaces in its thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0073] As an example, the negative electrode active material may be a negative electrode active material for a battery that is well known in the art. As an example, 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, 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. However, 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.

[0074] In some embodiments, 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 and mechanical stability can be selected.

[0075] As an example, the primary 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 particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0076] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0077] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel, or solid. Liquid electrolytes include an electrolyte salt and a solvent.

[0078] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonyl imide, lithium bistrifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium bisoxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0079] In some embodiments, the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl 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.

[0080] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0081] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0082] As an example, 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, or the like.

[0083] As an example, 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.

[0084] As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0085] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0086] In some embodiments, the electrode assembly is a laminate structure.

[0087] In some embodiments, a 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 (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0088] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0089] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to a tab of the electrode assembly. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal may be provided on an end cap or on the housing.

[0090] In some embodiments, the housing is provided with an explosion-proof valve for releasing the internal pressure of the battery cell.

[0091] As an example, 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, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in the embodiments of the present application.

[0092] 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.

[0093] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0094] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0095] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, 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.

[0096] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0097] Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability and low self-discharge coefficient. They are an important part of the development of new energy today.

[0098] The development of battery technology must take into account multiple design factors at the same time, such as energy density, discharge capacity, charge and discharge rate and other performance parameters. In addition, the assembly efficiency of the battery also needs to be considered.

[0099] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0100] Please refer to Figure 1, which is a schematic diagram of the structure of the vehicle provided in some embodiments of the present application. 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 provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can be used as an operating power source for the vehicle 1000, 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.

[0101] The vehicle 1000 may further include a controller 200 and a motor 300 . 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 the vehicle 1000 during startup, navigation, and driving.

[0102] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also 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.

[0103] Please refer to Figure 2, which is an exploded view of a battery provided in some embodiments of the present application. The battery 100 includes a housing 10 and a battery cell 20, with the battery cell 20 being housed within the housing 10. The housing 10 is used to provide a storage space for the battery cell 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 can include a first sub-housing 11 and a second sub-housing 12, which cover each other and together define a storage space for accommodating the battery cell 20. The second sub-housing 12 can be a hollow structure with one end open, and the first sub-housing 11 can be a plate-like structure, with the first sub-housing 11 covering the open side of the second sub-housing 12, so that the first sub-housing 11 and the second sub-housing 12 jointly define a storage space; the first sub-housing 11 and the second sub-housing 12 can also be hollow structures with one end open, with the open side of the first sub-housing 11 covering the open side of the second sub-housing 12.

[0104] In 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 hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 20 may be housed within the housing 10. Alternatively, the battery 100 may be constructed by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a complete battery module, and then housed within the housing 10. The battery 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0105] 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.

[0106] Please refer to Figure 3, which is an exploded view of a battery cell provided in some embodiments of the present application. As shown in Figure 3, a battery cell 20 includes a housing 21, an electrode assembly 22, and electrode terminals 25. Housing 21 includes a shell 211 and an end cap 212. Shell 211 has an opening, and end cap 212 closes the opening, isolating the internal environment of battery cell 20 from the external environment.

[0107] The housing 211 is a component used to cooperate with the end cap 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, electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. The housing 211 can be of various shapes and sizes. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 22. The housing 211 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0108] The end cap 212 is a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 212 can be adapted to the shape of the housing 211 to fit the housing 211. Optionally, the end cap 212 can be made of a material with a certain hardness and strength (such as an aluminum alloy). This prevents the end cap 212 from deforming when subjected to compression or collision, thereby providing the battery cell 20 with greater structural strength and improved reliability. Functional components such as electrode terminals can be provided on the end cap 212. The electrode terminals can be used to electrically connect to the electrode assembly 22 to output or input electrical energy to the battery cell 20. The end cap 212 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this is not particularly limited in the present embodiment. In some embodiments, an insulating structure can be provided on the inner side of the end cap 212 to isolate the electrical connection components within the housing 211 from the end cap 212 to reduce the risk of short circuits. For example, the insulating structure may be plastic, rubber, or the like.

[0109] The electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 22 may be contained 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. The separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid internal 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 tab. The positive tab and the negative tab 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 electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0110] Batteries are widely used in portable electronic devices, electric vehicles, power tools, drones, energy storage devices, and other fields. A battery's energy density directly determines its capacity to store energy. The greater the energy density, the greater the capacity of a battery of the same volume, and the more energy it can store. This, when installed in an electrical device, can extend the device's operating time.

[0111] The thickness of the end cap assembly and the battery casing can affect the energy density of the battery. Therefore, as the demand for battery energy density increases, the thickness of the end cap assembly and the battery casing are becoming thinner. The structural member located inside the end cap (i.e., the lower plastic of the battery) is also becoming thinner as part of the end cap assembly.

[0112] However, the thinner the structural component, the more difficult it is to produce. Specifically, after injection molding, due to its thin structure and low structural strength, the ejection mechanism will cause significant deformation of the component during ejection, especially in the area surrounding the contact point with the ejector pin. This makes it difficult to eject the component, reducing demolding efficiency and potentially even causing damage to the component during the ejection process.

[0113] Therefore, the present application proposes a structural member 23, the strength of which is significantly improved, thereby greatly improving the demoulding efficiency of the structural member 23 and reducing the damage rate of the structural member 23 during the demoulding process.

[0114] As shown in FIG. 4 , the structural member 23 according to the embodiment of the present application may include a body 231 and a reinforcement member.

[0115] The body 231 can be constructed as a plate-like structure, and can be made of an insulating material such as plastic. To achieve a higher energy density for the battery cell 20, the thickness of the structural member 23 or the body 231 is relatively small, and the body 231 is a thin structure. The body 231 is provided with a receiving area that can receive applied force. For example, during the demolding process, an ejector pin can abut against the receiving area, applying force to the receiving area, thereby ejecting the structural member 23 from the mold.

[0116] The receiving area may have a marking, for example, etched or painted on the receiving area, as long as the marking facilitates contact between the ejector pin and the receiving area. The receiving area may also be a groove of a certain depth so that the ejector pin can easily fit into the groove, not only ensuring contact between the ejector pin and the receiving area but also providing a positioning function.

[0117] This application does not limit the type of mark on the receiving area, as long as the mark on the receiving area can allow the ejector pin to easily contact the receiving area.

[0118] The reinforcement is fixed to the body 231. The reinforcement can be a separate structure from the body 231. The reinforcement can be fixed to the body 231 by bonding or hot melting. The reinforcement can also be an integral part with the body 231. For example, the reinforcement can be integrally injection molded with the body 231.

[0119] At least part of the reinforcement is arranged around the receiving area, so that the reinforcement can enhance the structural strength of the receiving area. The reinforcement can be close to the receiving area or extend to the receiving area, as long as it does not affect the force applied to the receiving area.

[0120] The reinforcement member can be a reinforcement rib, which protrudes from the surface of the main body 231 and can be arranged around the receiving area; the reinforcement member can also be a reinforcement bump, and there can be multiple reinforcement bumps, which can be arranged around the receiving area.

[0121] It should be noted that the structural member 23 can be made of plastic material, that is, the structural member 23 can be a plastic member. The structural member 23 and the plastic member in the embodiment of the present application refer to the same component.

[0122] A first through hole 202 may be provided on the main body 231, and the first through hole 202 may pass through the main body 231 along the thickness direction of the main body 231. The reinforcement may include a first reinforcement 232a, and the first reinforcement 232a is arranged on the main body 231. The first reinforcement 232a may be arranged on at least one of the two side surfaces of the main body 231 in the thickness direction. The first reinforcement 232a may also protrude from the surface of the main body 231. The first reinforcement 232a may be located around the first through hole 202 and close to the first through hole 202.

[0123] In other words, the first reinforcement member 232a can be configured as a reinforcing rib, thereby enhancing the structural strength of the body 231. The first reinforcement member 232a can particularly enhance the structural strength of the area surrounding the first through hole 202 in the body 231. As a result, when the ejector pin pushes against the area surrounding the first through hole 202 in the body 231 to complete demolding, the deformation of the area surrounding the first through hole 202 in the body 231 can be reduced, thereby facilitating ejection of the plastic part and improving demolding efficiency.

[0124] According to the structural member 23 of the embodiment of the present application, by providing a reinforcement member on the main body 231, and at least partially disposed around the receiving area, the reinforcement member not only increases the overall structural strength of the structural member 23, but most importantly, significantly enhances the structural strength of the receiving area and the area surrounding the receiving area. Consequently, when a force is applied to the receiving area, such as when an ejector pin abuts against the receiving area to effect demolding, the deformation of the area surrounding the receiving area is reduced, and even the deformation of the structural member 23 as a whole is reduced, thereby facilitating smooth demolding of the structural member 23 by the ejector pin, thereby improving demolding efficiency of the structural member 23.

[0125] In some embodiments of the present application, as shown in FIG7 , the thickness of the body 231 is t, which satisfies: 0.1 mm ≤ t ≤ 1.0 mm. For example, the thickness t of the body 231 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm. By setting the thickness of the body 231 to meet the above range, the overall thickness of the structural member 23 can be reduced, and the ratio of the volume of the structural member 23 to the space occupied by the battery cell 20 can be reduced, thereby improving the energy density of the battery cell 20. The above-mentioned thickness values ​​of the body 231 are only common examples of the thickness of the body 231. As long as the thickness of the body 231 falls within the above range, it is within the scope of protection of the present application.

[0126] According to some embodiments of the present application, the thickness of the body 231 is t, which satisfies the following conditions: 0.1 mm ≤ t ≤ 0.6 mm. For example, the thickness t of the body 231 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm. In other words, the thickness of the body 231 can be further reduced, thereby further reducing the overall thickness of the structural member 23, reducing the ratio of the volume of the structural member 23 to the space occupied by the battery cell 20, and thus improving the energy density of the battery cell 20. The above-mentioned thickness values ​​of the body 231 are only common examples of the thickness of the body 231. As long as the thickness of the body 231 falls within the above range, it is within the scope of protection of the present application.

[0127] In some embodiments of the present application, as shown in FIG5 , the maximum length of the body 231 is a, and the maximum width of the body 231 is b, satisfying: 150 mm ≤ a ≤ 500 mm, 20 mm ≤ b ≤ 150 mm.

[0128] It should be noted that the main body 231 can be constructed as a rectangular plate structure, so that the length of the main body 231 is the above-mentioned maximum length, and the width of the main body 231 is the above-mentioned maximum width; of course, the main body 231 can also be an oblong structure, as long as it is ensured that the structural member 23 can play the role of separating the end cover 212 and the electrode assembly 22.

[0129] In some embodiments of the present application, the maximum length of the body 231 can be 150mm, 180mm, 210mm, 240mm, 270mm, 310mm, 340mm, 350mm, 380mm, 410mm, 440mm, 470mm, or 500mm, and the maximum width of the body 231 can be 20mm, 40mm, 60mm, 80mm, 100mm, 120mm, 140mm, or 150mm. The maximum length and maximum width of the body 231 falling within the above ranges can serve to isolate the end cap 212 and the electrode assembly 22. Combined with the thickness of the body 231 described above, the structural member 23 has a large and thin structure, thereby reducing the ratio of the volume of the structural member 23 to the space occupied by the battery cell 20, thereby increasing the energy density of the battery cell 20. The above-mentioned length and width values ​​of the main body 231 are only common embodiments of the maximum length and maximum width of the main body 231. As long as the maximum length and maximum width of the main body 231 fall within the above-mentioned respective ranges, they are within the protection scope of this application.

[0130] In some embodiments of the present application, the maximum length of the body 231 is a, and the maximum width of the body 231 is b, satisfying the following: 150 mm ≤ a ≤ 350 mm, and 20 mm ≤ b ≤ 100 mm. For example, the maximum length of the body 231 can be 150 mm, 180 mm, 210 mm, 240 mm, 270 mm, 310 mm, 340 mm, or 350 mm, and the maximum width of the body 231 can be 20 mm, 40 mm, 60 mm, 80 mm, or 100 mm. This ensures that the structural member 23 is large and thin, while also reducing the ratio of the volume of the structural member 23 to the space occupied by the battery cells 20, thereby increasing the energy density of the battery cells 20. Furthermore, the structural member 23 is not subject to excessive strength reduction due to the excessive length and width of the body 231. The above-mentioned length and width values ​​of the body 231 are merely general examples of the maximum length and width of the body 231. As long as the maximum length and width of the body 231 fall within the above-mentioned ranges, they are within the scope of protection of the present application.

[0131] In some embodiments of the present application, a plurality of first reinforcement members 232a are provided, and the plurality of first reinforcement members 232a are spaced apart along the circumference of the first through hole 202. Machining the first through hole 202 on the body 231 will reduce the strength of the area surrounding the first through hole 202 on the body 231. Therefore, arranging the plurality of first reinforcement members 232a spaced apart along the circumference of the first through hole 202 not only improves the structural strength of the area surrounding the first through hole 202 on the body 231, but also ensures that the structural strength of the area surrounding the first through hole 202 on the body 231 is uniform.

[0132] In some embodiments of the present application, as shown in Figures 4 and 8, the first reinforcement member 232a is an arc-shaped reinforcement rib. Compared to linear reinforcement ribs, the arc-shaped reinforcement rib can better improve the structural strength around the first through hole 202 on the body 231. Therefore, when the ejector pin pushes against the area around the first through hole 202 on the body 231 to complete the demolding, the deformation of the area around the first through hole 202 on the body 231 can be reduced, thereby facilitating the ejection of the plastic part and improving the demolding efficiency of the plastic part.

[0133] According to some embodiments of the present application, since the first reinforcement member 232a is an arcuate reinforcement rib rather than an annular reinforcement rib, the arcuate reinforcement rib has a first opening, and the first opening can be arranged away from the first through hole. In other words, the arcuate reinforcement rib protrudes toward the first through hole. This further enhances the structural strength of the area surrounding the first through hole 202 on the body 231.

[0134] In some embodiments of the present application, as shown in FIG8 , the curvature of the curved reinforcement rib is α, satisfying the following: 90° ≤ α ≤ 270°. For example, the curvature of the curved reinforcement rib can be 90°, 120°, 150°, 180°, 210°, 240°, or 270°. The curvature of the curved reinforcement rib, when meeting the aforementioned range, not only increases the structural strength of the area surrounding the first through hole 202 in the body 231, but also reduces the difficulty of processing the partially enclosed curved reinforcement rib, thereby improving the production efficiency of plastic parts.

[0135] In some embodiments of the present application, the curvature α of the curved reinforcing rib satisfies the following: 135°≤α≤225°. For example, the curvature of the curved reinforcing rib can be 135°, 145°, 155°, 165°, 175°, 185°, 195°, 205°, 215°, or 225°. The curvature of the curved reinforcing rib falling within the above range can not only increase the structural strength of the area surrounding the first through hole 202 in the body 231, but also reduce the difficulty of processing the partially enclosed curved reinforcing rib, thereby improving the production efficiency of plastic parts.

[0136] In some embodiments of the present application, the radius of the arc-shaped reinforcement rib is R1, which satisfies the following: 0.5mm≤R1≤5mm. For example, the radius of the arc-shaped reinforcement rib can be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm. When the radius of the arc-shaped reinforcement rib satisfies the above conditions, the area occupied by the arc-shaped reinforcement rib on the main body 231 can be smaller. At the same time, combined with the above-mentioned condition that the curvature of the arc-shaped reinforcement rib is α, the overall structure of the arc-shaped reinforcement rib is more compact. Compared with the larger arc-shaped reinforcement rib, the more compact arc-shaped reinforcement rib can enhance the structural strength of the area around the first through hole 202 of the main body 231 to a greater extent, and the strength enhancement of the area around the first through hole 202 is also more uniform, thereby enhancing the overall structural strength of the main body 231, facilitating the ejection mechanism to quickly and non-damagingly eject the plastic part, making the plastic part easier to demold.

[0137] In some embodiments of the present application, the radius R1 of the arc-shaped reinforcement rib satisfies the following: 1mm≤R1≤4mm. For example, the radius of the arc-shaped reinforcement rib can be 1mm, 1.3mm, 1.6mm, 1.9mm, 2.2mm, 2.5mm, 2.8mm, 3.1mm, 3.4mm, 3.7mm, or 4mm. The radius of the arc-shaped reinforcement rib satisfies the above conditions, which can not only make the area occupied by the arc-shaped reinforcement rib on the main body 231 smaller, but also, combined with the above-mentioned condition that the curvature of the arc-shaped reinforcement rib is α, the overall structure of the arc-shaped reinforcement rib is more compact. Compared with the larger arc-shaped reinforcement rib, the more compact arc-shaped reinforcement rib can further improve the structural strength of the area around the first through hole 202 of the main body 231, thereby improving the overall structural strength of the main body 231, facilitating the ejection mechanism to quickly and non-damage the plastic part, making the plastic part easier to demold.

[0138] Of course, the radius of the above-mentioned arc-shaped reinforcement ribs are only some embodiments of the present application. As long as the radius of the arc-shaped reinforcement ribs meets the above-mentioned value range, they are within the protection scope of the present application.

[0139] It should be noted that the radius of the arc-shaped reinforcement rib refers to the virtual circle formed by the radius and the center of the circle is exactly located in the middle position of the arc-shaped reinforcement rib in the thickness direction.

[0140] In some embodiments of the present application, the radius of the curved reinforcing rib is R1, and the radius of the first through hole is R2, satisfying the following relationship: 0.06 ≤ R1 / R2 ≤ 1.67. For example, R1 / R2 can be 0.06, 0.08, 0.10, 0.3, 0.5, 0.7, 0.9, 1.1, 1.2, 1.3, 1.4, 1.5, or 1.67. This eliminates the problem of the radius of the curved reinforcing rib being too small compared to the radius of the first through hole 202, which would require a large number of curved reinforcing ribs to maintain roughly consistent strength in the area around the first through hole 202 on the body 231, thereby increasing the difficulty of processing the plastic part. Furthermore, the problem of the radius of the curved reinforcing rib being too small compared to the radius of the first through hole 202, which would require only a small number of curved reinforcing ribs to be placed in the area around the first through hole 202 on the body 231, thereby resulting in inconsistent strength in the area around the first through hole 202, is also eliminated.

[0141] In some embodiments of the present application, the radius of the arc-shaped reinforcement rib is R1, and the radius of the first through hole is R2, satisfying the following relationship: 0.2 ≤ R1 / R2 ≤ 1. For example, R1 / R2 can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1. Thus, the problem of the radius of the arc-shaped reinforcement rib being too small compared to the radius of the first through hole 202, which would require a large number of arc-shaped reinforcement ribs to maintain roughly consistent strength in the area around the first through hole 202 on the body 231, and which would also increase the difficulty of processing the plastic part, will not occur. Furthermore, the problem of the radius of the arc-shaped reinforcement rib being too small compared to the radius of the first through hole 202, which would require only a small number of arc-shaped reinforcement ribs to be placed in the area around the first through hole 202 on the body 231, and thus lead to inconsistent strength in the area around the first through hole 202, will not occur.

[0142] The ratio of the radius of the arc-shaped reinforcement rib R1 to the radius of the first through hole R2 in this application is only some embodiments of this application. As long as the ratio of the radius of the arc-shaped reinforcement rib R1 to the radius of the first through hole R2 is within the above range, it is protected by this application.

[0143] According to some embodiments of the present application, as shown in Figure 4, a first through hole 202 is provided on the main body 231, and the first through hole 202 can penetrate the main body along the thickness direction of the main body. The receiving area includes a first receiving area 201a, and the first receiving area 201a is located at the periphery of the first through hole 202. The reinforcement includes a first reinforcement 232a, and the first reinforcement 232a is located at the periphery of the first receiving area 201a.

[0144] It should be noted that the first receiving area 201a can be pushed by the ejector pins during the demoulding process of the plastic part, so that the ejector pins can apply force to the plastic part to eject it from the mold.

[0145] In the embodiment of the present application, first receiving area 201a is the ejector pin mating area. The first receiving area 201a and the ejector pin mating area refer to the same area. The ejector pin mating area is located near first through-hole 202, and the arc-shaped reinforcement rib is located between the ejector pin mating area and first through-hole 202. Therefore, the arc-shaped reinforcement rib not only enhances the strength of the area surrounding first through-hole 201 on the body 231, but also improves the structural strength of the ejector pin mating area, making it less likely to deform when subjected to the ejector pin's push force, thereby improving the demolding efficiency of the plastic part 23.

[0146] The first through hole 202 can be configured as an injection hole. When the electrode assembly 22 is placed inside the shell and the end cap 212 closes the opening of the shell, the electrolyte can be injected into the shell through the injection hole. The shape of the first through hole 202 can be circular, rectangular, or other shapes, as long as it ensures that the injection process can proceed smoothly. The first through hole 202 can be set in the middle area 204 or the end area 203 of the body 231. This application does not specifically limit the position of the first through hole 202 on the body 231.

[0147] The first receiving area 201a is located at the periphery of the first through hole 202, that is, the first receiving area 201a is close to the first through hole 202. Since the first through hole 202 is opened on the main body 231, the structural strength near the first through hole 202 will become lower, so it is necessary to strengthen the strength of the area around the first through hole 202.

[0148] In the embodiment of the present application, a first reinforcement member 232a is provided in the area surrounding the first through-hole 202, so that the first reinforcement member 232a can increase the structural strength of the area surrounding the first receiving area 201a (i.e., the ejector pin mating area). It is understood that, in addition to the area surrounding the first receiving area 201a, the body 231 also includes other areas besides the area surrounding the first receiving area 201a. Reinforcements can also be provided in these other areas, and the reinforcements in these other areas can extend to the area surrounding the first receiving area 201a. Therefore, under the premise that the structural strength of the area surrounding the first receiving area 201a has been strengthened by the reinforcements in other areas, the first reinforcement member 232a can further increase the structural strength of the area surrounding the first receiving area 201a.

[0149] In some embodiments of the present application, as shown in FIG4 , at least a portion of the first reinforcement member 232a is located between the first through-hole 202 and the first receiving area 201a. In other words, a portion of the first reinforcement member 232a may be located between the first through-hole 202 and the first receiving area 201a, while another portion of the first reinforcement member 232a is located only on the periphery of the first receiving area 201a. Alternatively, the entire first reinforcement member 232a may be located between the first through-hole 202 and the first receiving area 201a. This increases the structural strength of not only the area surrounding the first receiving area 201a but also the area surrounding the first through-hole 202.

[0150] For example, the first reinforcement member 232a can be configured as an annular structure that surrounds the first receiving area 201a, with a portion of the annular structure located between the first through-hole 202 and the first receiving area 201a, and another portion of the annular structure located only on the periphery of the first receiving area 201a. Of course, the first reinforcement member 232a can also be configured as a plurality of spaced protrusion structures, with a portion of the plurality of protrusion structures located between the first through-hole 202 and the first receiving area 201a, and another portion of the plurality of protrusion structures located only on the periphery of the first receiving area 201a.

[0151] In some embodiments of the present application, there are multiple first receiving areas 201a and first reinforcement members 232a, and the multiple first receiving areas 201a are spaced apart around the periphery of the first through hole 202, and a corresponding first reinforcement member 232a is provided between each first receiving area 201a and the first through hole 202. Thus, the structural strength of the area around the first receiving area 201a and the area around the first through hole 202 can be increased.

[0152] Similarly, at least a portion of each first reinforcement member 232a can be disposed between the corresponding first receiving area 201a and the first through hole 202. The structure or arrangement of the first reinforcement member 232a is as described above and will not be repeated here.

[0153] In some embodiments of the present application, multiple first reinforcement members 232a can be a split structure, and a portion of each first reinforcement member 232a can be arranged between the corresponding first receiving area 201a and the first through hole 202. For example, the first reinforcement member 232a can be constructed in a ring shape and arranged around the corresponding first receiving area 201a.

[0154] In other embodiments of the present application, multiple first reinforcement members 232a can be a split structure, and the entirety of each first reinforcement member 232a is arranged between the corresponding first receiving area 201a and the first through hole 202; or multiple first reinforcement members 232a can be part of an annular structure that surrounds the first through hole 202, and at least a portion of each first reinforcement member 232a can be arranged between the corresponding first receiving area 201a and the first through hole 202.

[0155] According to some embodiments of the present application, the first reinforcement member 232a is constructed in an arc shape and extends along the circumference of the first receiving area 201a. For example, the first reinforcement member 232a is an arc-shaped reinforcement rib, and the arc-shaped reinforcement rib can extend along the circumference of the first receiving area 201a (i.e., the ejector fitting area). The arc-shaped first reinforcement member 232a can not only increase the structural strength of the surrounding area of ​​the first receiving area 201a, but also keep the structural strength of the surrounding area of ​​the first receiving area 201a uniform. Of course, the first reinforcement member 232a can also be constructed as a plurality of raised structures, and the plurality of raised structures can also be arranged on the periphery of the first receiving area 201a along an arc trajectory, thereby not only increasing the structural strength of the surrounding area of ​​the first receiving area 201a, but also keeping the structural strength of the surrounding area of ​​the first receiving area 201a uniform.

[0156] It is understandable that the first reinforcement member 232a can be constructed in a circular ring shape. Thus, the circular ring-shaped first reinforcement member 232a can surround the outer periphery of the first receiving area 201a. This maximizes the structural strength of the first receiving area 201a. Of course, the first reinforcement member 232a can also be constructed as multiple protrusion structures, and the multiple protrusion structures can also be arranged along the circular ring trajectory on the outer periphery of the first receiving area 201a. The first reinforcement member 232a can also have other shapes. This application does not limit the specific shape of the first reinforcement member 232a. It is sufficient to ensure that the first reinforcement member 232a is arranged on the outer periphery of the first receiving area 201a to increase the structural strength of the surrounding area of ​​the first receiving area 201a.

[0157] In some embodiments of the present application, as shown in Figures 4 and 6, the receiving area includes a second receiving area 201b, which is located in the end area 203 and / or the middle area 204 of the body 231 in the first direction, and the reinforcement includes a second reinforcement 232b, which is located in the end area 203 and / or the middle area 204.

[0158] The position of the second receiving area 201b can be understood as other areas on the body 231 except the first receiving area 201a, and this part of the area can include the end area 203 and the middle area 204 in the first direction. External force can also be applied to the second receiving area 201b, so that the structural member 23 can be demoulded together with the external force on the first receiving area 201a. Of course, in order to alleviate the problem of excessive deformation of the area near the second receiving area 201b when the second receiving area 201b receives external force, the area near the second receiving area 201b or the end area 203 and / or the middle area 204 of the body 231 in the first direction can be provided with a second reinforcement 232b, thereby improving the structural strength of the area near the second receiving area 201b and improving the structural strength of the structural member 23 as a whole.

[0159] In some embodiments of the present application, as shown in FIG4 , the second reinforcement member 232b includes a first reinforcement rib 232b1 and a second reinforcement rib 232b2 . The first reinforcement rib 232b1 extends in a first direction X, and the second reinforcement rib 232b2 extends in a second direction Y. The first direction X and the second direction Y intersect.

[0160] The first reinforcing rib 232b1 and the second reinforcing rib 232b2 can be constructed as an elongated structure. The first reinforcing rib 232b1 can protrude from the outer surface of the main body 231, and the second reinforcing rib 232b2 can also protrude from the outer surface of the main body 231. The first reinforcing rib 232b1 and the second reinforcing rib 232b2 can be fixed to the main body 231 by bonding, hot melting, or the like. Of course, the first reinforcing rib 232b1 and the second reinforcing rib 232b2 can also be integrally formed with the main body 231. The first reinforcing rib 232b1 and the second reinforcing rib 232b2 are provided on the main body 231 to enhance the structural strength of the structural member 23, thereby reducing deformation of the structural member 23 when an external force is applied to the receiving area and improving the demolding efficiency of the structural member 23. The intersection of the first reinforcing rib 232b1 and the second reinforcing rib 232b2 can further enhance the structural strength of the structural member 23 and improve the demolding efficiency of the structural member 23.

[0161] In some embodiments of the present application, the body 231 is provided with a second through hole 205 through which the electrode terminal 25 passes, and one end of the first reinforcing rib 232b1 extends to the edge of the second through hole 205. Thus, the first reinforcing rib 232b1 can increase the structural strength of the area around the second through hole 205, thereby improving the overall structural strength of the structural member 23.

[0162] Of course, one end of the second reinforcing rib 232b2 may also extend to the edge of the second through hole 205 , so that the second reinforcing rib 232b2 can increase the structural strength of the area around the second through hole 205 , thereby improving the overall structural strength of the structural member 23 .

[0163] In some embodiments of the present application, there are multiple first reinforcing ribs 232b1 and multiple second reinforcing ribs 232b2. The multiple first reinforcing ribs 232b1 can all extend along the first direction X, and the multiple second reinforcing ribs 232b2 can all extend along the second direction Y. Thus, the multiple first reinforcing ribs 232b1 and the multiple second reinforcing ribs 232b2 are interlaced to form a grid-like structure, further enhancing the overall structural strength of the structural member 23.

[0164] In some embodiments of the present application, the second through-hole 205 extends through the body 231 along the thickness of the body 231, and at least a portion of the first reinforcement member 232a is located between the first through-hole 202 and the second through-hole 205. In other words, the presence of the first through-hole 202 and the second through-hole 205 in the body 231 reduces the strength of the area near the first through-hole 202 and the second through-hole 205. However, positioning the first reinforcement member 232a between the first through-hole 202 and the second through-hole 205 not only improves the structural strength of the area near the first through-hole 202, but also improves the structural strength of the area near the second through-hole 205. This improves the overall structural strength of the plastic part, facilitating rapid demolding of the plastic part by the ejection mechanism.

[0165] In other embodiments of the present application, multiple first reinforcement members 232a are provided, with at least a portion of the multiple first reinforcement members 232a positioned between the first through-hole 202 and the second through-hole 205. This improves the structural strength of the area surrounding the first through-hole 202 and the second through-hole 205 on the body 231. This improves the overall structural strength of the plastic part, facilitating rapid demolding of the plastic part by the ejection mechanism.

[0166] In some embodiments of the present application, the body 231 has a first surface 206 in the thickness direction, and the receiving area and the reinforcement are both disposed on the first surface 206. In other words, the receiving area and the reinforcement are both disposed on the same surface in the thickness direction of the body 231. Consequently, one surface in the thickness direction of the body 231 need not be provided with a reinforcement protruding from that surface, ensuring that that surface can be stably mounted on the component to be mounted.

[0167] Of course, the receiving area and the reinforcement may also be provided on two side surfaces of the body 231 in the thickness direction, respectively, as long as the reinforcement can increase the structural strength of the area surrounding the receiving area.

[0168] In some embodiments of the present application, the body 231 has a first surface 206 in the thickness direction, and the reinforcement member is protruded from the first surface 206. In other words, the reinforcement member is configured as a reinforcing rib or a reinforcing protrusion, which can enhance the structural strength of the area surrounding the receiving area and ensure that the reinforcement member can be smoothly demolded under the action of external force.

[0169] In some embodiments of the present application, as shown in Figures 4 to 7, the structural member 23 also includes a protrusion 233 protruding from the first surface 206, the protrusion 233 is used to abut the electrode assembly 22, and the height of the reinforcement protruding from the first surface 206 is less than the height of the protrusion 233 protruding from the first surface 206.

[0170] After the end cap 212 closes the opening of the housing, the protrusion 233 can rest against the electrode assembly 22, thereby reducing the wobbling of the electrode assembly 22 within the housing and ensuring the overall stability of the battery cell 20. The height of the reinforcement protruding from the first surface 206 is less than the height of the protrusion 233 protruding from the first surface 206. For example, the first reinforcement 232a is disposed on the first surface 206, and the height of the first reinforcement 232a protruding from the first surface 206 is less than the height of the protrusion 233 protruding from the first surface 206. This allows full utilization of the space defined by the protrusion 233 and the body 231, and the protruding reinforcement does not increase the thickness of the structural member 23.

[0171] In some embodiments of the present application, the plastic part further includes a protrusion 233 protruding from the first surface. The protrusion 233 is used to abut the electrode assembly 22, and the first through hole 202 is close to the protrusion 233. Specifically, there may be three protrusions 233, two of which are located at both ends of the plastic part in the longitudinal direction, and another protrusion 233 is located in the middle area of ​​the plastic part in the longitudinal direction. Since the first through hole 202 is close to the protrusion 233 in the middle area of ​​the plastic part in the longitudinal direction, the structural strength of the area between the first through hole 202 and the protrusion 233 in the middle area of ​​the plastic part is not greatly reduced.

[0172] In some embodiments of the present application, the first through hole 202 is located between the second through hole 205 and the protrusion 233. For example, the first through hole 202 is located between the second through hole 205 and the protrusion 233 in the middle region of the plastic part in the longitudinal direction. Since the first reinforcement member 232a is provided in the area surrounding the first through hole 202, the structural strength of the area surrounding the first through hole 202 is enhanced, and the structural strength of the area surrounding the second through hole 205 is also enhanced.

[0173] In some embodiments of the present application, the structural member 23 is made of an insulating material and is used to isolate the end cap 212 of the battery cell 20 from the electrode assembly 22. The insulating member can be constructed as a plastic member. The insulating structural member 23 can completely separate the electrode assembly 22 and the end cap 212, reducing the probability of contact between the electrode assembly 22 and the end cap 212, thereby effectively reducing the probability of electrical connection between the electrode assembly 22 and the end cap 212.

[0174] The end cap assembly 210 of the embodiment of the present application is briefly described below.

[0175] According to an embodiment of the present application, the end cap assembly 210 may include an end cap 212, an electrode terminal 25 and a structural member 23. The electrode terminal 25 is installed on the end cap 212. The structural member 23 is the structural member 23 described in the above embodiment. The structural member 23 is arranged on the inner side surface of the end cap 212. A second through hole 205 for the electrode terminal 25 to pass through is provided on the main body 231.

[0176] The end cap 212 has an inner side facing the electrode assembly 22 and an outer side facing away from the electrode assembly 22. The thickness of the body 231 is aligned with the thickness of the end cap 212. Because the structural member 23 in this embodiment of the present application is located on the inner side of the end cap 212, not only is the thickness of the structural member 23 relatively thin, thereby increasing the energy density of the battery cell 20, but the structural member 23 also has a certain strength, reducing the deformation of the area surrounding the receiving area of ​​the structural member 23 when an external force is applied thereto, thereby facilitating the demolding process of the structural member 23.

[0177] In some embodiments of the present application, the body 231 has a first surface 206 facing away from the end cap 212, and a reinforcement member protrudes from the first surface 206. The height of the reinforcement member protruding from the first surface 206 is less than or equal to the height of the electrode terminal 25 protruding from the first surface 206. For example, the first reinforcement member 232a protrudes from the first surface 206, and the height of the first reinforcement member 232a protruding from the first surface 206 is less than or equal to the height of the electrode terminal 25 protruding from the first surface 206. As a result, the reinforcement member can fully utilize the space defined by the electrode terminal 25 and the body 231. The protruding reinforcement member does not increase the thickness dimension of the structural member 23. In other words, the provision of the reinforcement member does not reduce the energy density of the battery cell 20.

[0178] The following briefly describes the battery cell 20 according to the embodiment of the present application.

[0179] According to the embodiment of the present application, the battery cell 20 includes the end cover assembly 210 of the above embodiment. Since the battery cell 20 according to the embodiment of the present application is provided with the above end cover assembly 210, the battery cell 20 has a higher energy density. At the same time, the structural member 23 in the battery cell 20 will not have a phenomenon of reduced production efficiency due to being thin.

[0180] The battery 100 according to an embodiment of the present application is briefly described below.

[0181] The battery 100 according to the embodiment of the present application includes the battery cell 20 of the above-mentioned embodiment. Since the battery 100 according to the embodiment of the present application is provided with the above-mentioned battery cell 20, the battery 100 has a higher energy density. At the same time, the structural member 23 in the battery 100 will not have a phenomenon of reduced production efficiency due to being thin.

[0182] The following briefly describes the electrical equipment in the embodiment of the present application.

[0183] The electric device according to the embodiment of the present application includes the battery 100 of the above embodiment. Since the electric device according to the embodiment of the present application is provided with the above battery 100, the usage time of the electric device is increased, thereby improving the consumer's usage experience.

[0184] The battery cell 20 disclosed in the embodiment of the present application can be used in, but is not limited to, electrical equipment such as vehicles, ships, or aircraft. A power supply system of the electrical equipment can be composed of the battery cell 20 disclosed in the present application and batteries.

[0185] The present invention provides an electrical device that uses a battery cell 20 as a power source. The electrical 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, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0186] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A plastic part, characterized in that: include: A body in a plate shape, the body is provided with a first through hole, and the first through hole penetrates the body along a thickness direction; The first reinforcement member is disposed on the body and protrudes from the surface of the body. The first reinforcement member is located around the first through hole and close to the first through hole.

2. The plastic part according to claim 1, characterized in that: The thickness of the body is t, which satisfies: 0.1 mm ≤ t ≤ 1.0 mm.

3. The plastic part according to claim 2, characterized in that: Satisfies: 0.1mm≤t≤0.6mm.

4. The plastic part according to any one of claims 1 to 3, characterized in that: The first reinforcement members are multiple in number, and the multiple first reinforcement members are arranged at intervals along the circumferential direction of the first through hole.

5. The plastic part according to any one of claims 1 to 4, characterized in that: The first reinforcement member is an arc-shaped reinforcement rib.

6. The plastic part according to claim 5, characterized in that: The arc-shaped reinforcing rib has a first opening, and the first opening is arranged away from the first through hole.

7. The plastic part according to claim 5 or 6, characterized in that: The arc angle of the arc-shaped reinforcing rib is α, which satisfies: 90°≤α≤270°.

8. The plastic part according to claim 7, characterized in that: 135°≤α≤225°。 9. The plastic part according to claim 7 or 8, characterized in that: The radius of the arc-shaped reinforcing rib is R1, which satisfies: 0.5mm≤R1≤5mm.

10. The plastic part according to claim 9, characterized in that: 1mm≤R1≤4mm.

11. The plastic part according to any one of claims 7 to 10, characterized in that: The radius of the arc-shaped reinforcing rib is R1, and the radius of the first through hole is R2, satisfying: 0.06≤R1 / R2≤1.

67.

12. The plastic part according to claim 11, characterized in that: 0.2≤R1 / R2≤1.

13. The plastic part according to any one of claims 5 to 12, characterized in that: The main body is provided with an ejector pin matching area, the ejector pin matching area is close to the first through hole, and the arc-shaped reinforcing rib is located between the ejector pin matching area and the first through hole.

14. The plastic part according to claim 13, characterized in that: The arc-shaped reinforcing rib extends along the circumference of the ejector pin matching area.

15. The plastic part according to any one of claims 1 to 14, characterized in that: The body is provided with a second through hole through which the supply terminal passes, and the second through hole penetrates the body in the thickness direction; At least part of the first reinforcement is located between the first through hole and the second through hole; or there are multiple first reinforcements, and at least part of the multiple first reinforcements is located between the first through hole and the second through hole.

16. The plastic part according to any one of claims 1 to 15, characterized in that: The body has a first surface in the thickness direction; The plastic part further includes a convex portion protruding from the first surface, the convex portion is used to abut against the electrode assembly, and the first through hole is close to the convex portion.

17. The plastic part according to claim 16, characterized in that: The main body is provided with a second through hole for the power terminal to pass through, and the first through hole is located between the second through hole and the protrusion.

18. The plastic part according to claim 16 or 17, characterized in that: The first reinforcement member is disposed on the first surface, and a height of the first reinforcement rib protruding from the first surface is smaller than a height of the convex portion protruding from the first surface.

19. The plastic part according to any one of claims 1 to 18, characterized in that: The maximum length of the main body is a, and the maximum width of the main body is b, satisfying: 150mm≤a≤500mm, 20mm≤b≤150mm.

20. The plastic part according to claim 19, characterized in that: Meet the following requirements: 150mm≤a≤350mm, 20mm≤b≤100mm.

21. The plastic part according to any one of claims 1 to 20, characterized in that: It also includes a second reinforcement member, which is located in the end area and / or the middle area of ​​the body in the length direction.

22. The plastic part according to claim 21, characterized in that: The second reinforcement member includes a first reinforcement rib and a second reinforcement rib, the first reinforcement rib extends in a length direction, and the second reinforcement rib extends in a width direction.

23. The plastic part according to claim 22, characterized in that: The main body is provided with a second through hole for the electric pole terminal to pass through, and one end of the first reinforcing rib extends to the edge of the second through hole.

24. An end cap assembly, characterized in that: include: End caps; An electrode terminal mounted on the end cap; The plastic part according to any one of claims 1 to 23 is arranged on the inner side of the end cover, and the body is provided with a second through hole for the electrode terminal to pass through.

25. The end cap assembly according to claim 24, characterized in that The body has a first surface facing away from the end cover, the first reinforcement is protruded from the first surface, and a height of the first reinforcement protruding from the first surface is less than or equal to a height of the electrode terminal protruding from the first surface.

26. A battery cell, characterized in that: Comprising an end cap assembly as claimed in claim 24 or 25.

27. A battery, characterized in that: Comprising the battery cell as claimed in claim 26.

28. An electrical equipment, characterized in that: Comprising the battery of claim 27.

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