CN220400740U - Battery monomer, battery and power consumption device - Google Patents
Battery monomer, battery and power consumption device Download PDFInfo
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- CN220400740U CN220400740U CN202322881441.4U CN202322881441U CN220400740U CN 220400740 U CN220400740 U CN 220400740U CN 202322881441 U CN202322881441 U CN 202322881441U CN 220400740 U CN220400740 U CN 220400740U
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- protrusion
- top cover
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- assembly
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- 239000000178 monomer Substances 0.000 title abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims abstract description 22
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- 238000002347 injection Methods 0.000 description 12
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application provides a battery monomer, battery and power consumption device, belongs to battery technical field. The battery cell includes: a housing having a receiving cavity and an end having an opening; an electrode assembly disposed in the receiving chamber of the case; and a cap assembly disposed at the opening of the case and including a cap sheet including a first surface facing one side of the electrode assembly. The top cover sheet is provided with a first groove recessed in the thickness direction of the top cover assembly at least at part of the peripheral edge of the first surface or inside at least part of the peripheral edge. Alternatively, the top sheet is provided with a first protrusion protruding in the thickness direction of the top cap assembly at or inside at least part of the peripheral edge of the first surface, and the top sheet is provided with a first groove recessed in the thickness direction of the top cap assembly at or inside at least part of the peripheral edge of the first surface.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery monomer, a battery and an electric device.
Background
Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.
When the existing single battery top cover is used in an inverted mode, electrolyte easily flows out from a plurality of positions of the top cover assembly to the top cover sheet and flows to the welding seam of the aluminum shell along the edge of the top cover sheet, the welding seam is corroded, the mechanical strength of the welding seam is weakened, the service performance of the single battery is affected, and due to the fact that the electrolyte is continuously consumed, the amount of effective electrolyte in the single battery is reduced, and the battery circulation performance is poorer.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the background art. It is therefore an object of the present application to provide a battery cell that improves/alleviates/solves the problem of electrolyte flowing out of the cap assembly and corroding the weld in the context of inverted use of the battery.
Embodiments of the first aspect of the present application provide a battery cell comprising: a housing having a receiving cavity and an end having an opening; an electrode assembly disposed in the receiving chamber of the case; and a cap assembly disposed at the opening of the case and including a cap sheet including a first surface facing one side of the electrode assembly, wherein the cap sheet is provided at or inside at least part of a peripheral edge of the first surface with a first groove recessed in a thickness direction of the cap assembly, or wherein the cap sheet is provided at or inside at least part of a peripheral edge of the first surface with a first protrusion protruding in the thickness direction of the cap assembly, and the cap sheet is provided at or inside at least part of a peripheral edge of the first surface with a first groove recessed in the thickness direction of the cap assembly.
In the technical scheme of this application embodiment, through set up boss and/or recess in the one side of top cap piece towards electrode assembly, reduce under the scene of inversion, electrolyte flow to the route of top cap piece, increase electrolyte flow to the degree of difficulty of top cap piece, consequently can alleviate electrolyte along top cap piece flow to top cap-casing welding seam to a certain extent to alleviate the problem that the welding seam corrodes.
In some embodiments, the top cover assembly further comprises an insulating part arranged on one side of the top cover sheet facing the electrode assembly, at least one buckling part is arranged on the insulating part, the buckling part is of a closed structure on one side deviating from the electrode assembly, and the inner space of the closed structure is not communicated with the space on one side of the top cover sheet deviating from the electrode assembly. Through the buckle piece position inside design of insulating part for enclosed construction to the inner space does not communicate with the space of top cap piece deviating from electrode assembly one side, alleviates electrolyte and flows to the top cap piece from the buckle piece position.
In some embodiments, the insulating member includes a second surface facing one side of the electrode assembly and at least one through hole extending in a thickness direction of the cap assembly, the at least one through hole being provided at least a portion of an edge of one end on the second surface with a second protrusion protruding in the thickness direction of the cap assembly, and/or the at least one through hole being provided at least a portion of an edge of one end on the second surface with a second groove recessed in the thickness direction of the cap assembly. The protruding part and/or the groove are/is arranged at the outer edge of the liquid injection port on the insulating piece, so that electrolyte can flow out of the liquid injection port in an inverted scene, further flows to the top cover plate and corrodes the welding seam.
In some embodiments, the top surface of the first boss and/or the second boss is beveled such that the height of the outer sidewall of the first boss and/or the second boss is greater than the height of the inner sidewall. The top surfaces of the first protruding parts and/or the second protruding parts are designed to be inclined planes, so that electrolyte with large faces of the aluminum shell can flow to the positions of the insulating part and the top cover sheet, and the electrolyte with large faces dripping is prevented from flowing to the welding seam area along the large faces of the shell, so that the welding seam is corroded.
In some embodiments, the first protrusion extends along the entire peripheral edge of the first surface to form a closed loop, and/or the first recess extends along the inside of the entire peripheral edge of the first surface to form a closed loop. When the first protrusion and/or the first groove are continuously provided to form a closed loop, it is possible to maximally block the flow of the electrolyte to the weld.
In some embodiments, the second protrusion extends along the entire edge of the end of the through hole on the second surface to form a closed loop, and/or the second recess extends along the entire edge of the end of the through hole on the second surface to form a closed loop. When the second protrusion and/or the second groove are continuously provided to form a closed loop, it is possible to maximally block the flow of the electrolyte to the weld.
In some embodiments, the top cover sheet has a length direction and a width direction, a ratio of a dimension of any section of the first projection extending in the width direction in the length direction to the dimension of the top cover sheet in the length direction is equal to or less than 0.1, and/or a ratio of a dimension of any section of the first projection extending in the length direction in the width direction to the dimension of the top cover sheet in the width direction is equal to or less than 0.1. By providing the widths of the first and second bosses, assembly can be facilitated to the greatest extent and electrolyte flow out of the corrosion weld can be relieved to the greatest extent.
In some embodiments, the first protrusion has a rounded or chamfered corner at the top edge and/or the first recess has a rounded or chamfered corner at the bottom edge. By providing rounded corners or chamfers, the assembly and the assembly between the top cap assembly and the electrode assembly and the case can be facilitated, and the stress concentration of the top cap sheet at the top edge during the manufacturing can be reduced.
In some embodiments, the dimension between the outer sidewall and the inner sidewall of the first lobe is different or the same at different heights of the first lobe and/or the dimension between the outer sidewall and the inner sidewall of the first groove is different or the same at different depths of the first groove. Can be flexibly applied to connection and installation between other components.
In some embodiments, the second protrusion has a rounded or chamfered corner at the top edge and/or the second recess has a rounded or chamfered corner at the bottom edge. By providing rounded corners or chamfers, the assembly and installation between the top cap assembly and the electrode assembly and the case can be facilitated, and the stress concentration of the insulating member at the top edge during manufacture can be reduced.
In some embodiments, the dimension between the outer sidewall and the inner sidewall of the second protrusion is different or the same at different heights of the second protrusion and/or the dimension between the outer sidewall and the inner sidewall of the second groove is different or the same at different depths of the second groove. Can be flexibly applied to connection and installation between other components.
An embodiment of the second aspect of the present application provides a battery, which includes the battery cell in the above embodiment.
An embodiment of a third aspect of the present application provides an electrical device, including a battery in the above embodiment, where the battery is configured to provide electrical energy.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not therefore to be considered limiting of its scope.
Fig. 1 is a schematic view illustrating an exploded structure of a battery cell according to some embodiments of the present application;
FIG. 2 is a schematic exploded view of a header assembly according to some embodiments of the present application;
FIG. 3 is a schematic structural view of a coversheet of some embodiments of the present application;
FIG. 4 is a schematic view of a partial structure of an insulator according to some embodiments of the present application;
FIG. 5 is another partial schematic view of an insulator according to some embodiments of the present application;
fig. 6 is an exploded view of a battery according to some embodiments of the present application;
fig. 7 is a schematic structural view of a vehicle according to some embodiments of the present application.
Reference numerals illustrate:
a vehicle 1000;
battery 100, controller 200, motor 300;
a housing 102, a first portion 1121, a second portion 1122;
battery cell 1, top cap assembly 10, sealing nail 14, case 20, electrode assembly 30, tab 30a;
a top cover sheet 11, a first surface 11a, a liquid inlet 111, a first projection 112, a first recess 113;
the insulation member 12, the second surface 12a, the through hole 121, the buckle 122, the second protrusion 1211, and the second groove 1212.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.
Under the conventional design of the top cover assembly of the existing battery cell, when the battery cell is used in an inverted mode, electrolyte easily flows out from a plurality of positions of the top cover assembly to the top cover sheet, for example, out from the hole slots of the hanging top support at the shoulder sides of two ends of the insulating piece, is dispersed in the top cover sheet and the insulating piece, flows to the welding seam of the aluminum shell along the edge of the top cover sheet, corrodes the welding seam, weakens the mechanical strength of the welding seam, and influences the service performance of the battery cell. In addition, electrolyte which is not effectively climbed to the electrode assembly is easy to stay at the surrounding insulating part, and the electrolyte flows to the top cover sheet through the insulating part liquid injection port and the top cover sheet liquid injection port in sequence under the action of external force, so that the risk of corrosion of the top cover sheet exists. Electrolyte is continuously consumed by superposition corrosion, the effective electrolyte in the battery cell is less and less, and the battery cell has poorer cycle performance. In addition, the inner cavity of the hole is communicated with the top cover piece, under vibration impact, electrolyte at the bottom of the battery cell (the direction of the electrode assembly towards the top cover) splashes to the top cover piece along the cavity, the top cover piece is corroded, electrolyte is continuously consumed by superposition corrosion, the effective electrolyte in the battery cell is less and less, and the performance of the battery is attenuated due to poor electrolyte infiltration in the use process.
Based on the above consideration, a battery cell is designed, and the top cover assembly is optimized, so that the problems of electrolyte corrosion top cover plates and welding seams between the top cover assembly and the shell are solved, the condition that electrolyte flows away from the electrode assembly can be improved, infiltration is improved, and the battery performance is improved.
Referring to fig. 1 to 3, fig. 1 is an exploded view of a battery cell according to some embodiments of the present application, fig. 2 is an exploded view of a top cap assembly according to some embodiments of the present application, and fig. 3 is a view of a top sheet according to some embodiments of the present application. The embodiment provides a battery cell 1 including a case 20, an electrode assembly 30, and a top cap assembly 10. The case 20 has a receiving cavity and an end portion has an opening, the electrode assembly 30 is disposed in the receiving cavity of the case 20, the cap assembly 10 is disposed in the opening of the case 20 and includes a cap sheet 11, and the cap sheet 11 includes a first surface 11a facing a side of the electrode assembly 30. In some embodiments, the top cover sheet 11 is provided with a first groove 113 recessed in the thickness direction Z of the top cover assembly 10 at or inside at least part of the peripheral edge of the first surface 11a. In some embodiments, the top cover sheet 11 is provided with a first protrusion 112 protruding in the thickness direction Z of the top cover assembly 10 at or inside at least part of the peripheral edge of the first surface 11a, and the top cover sheet 11 is provided with a first groove 113 recessed in the thickness direction Z of the top cover assembly 10 at or inside at least part of the peripheral edge of the first surface 11a.
Referring to fig. 1, a battery cell 1 refers to the smallest unit constituting a battery. As shown in fig. 1, the battery cell 1 includes a top cap assembly 10, a case 20, an electrode assembly 30, and other functional components. The top cap assembly 10 refers to a member that is covered at the opening of the case 20 to isolate the inner environment of the battery cell 1 from the outer environment. Without limitation, the shape of the top cover assembly 10 may be adapted to the shape of the housing 20 to fit the housing 20. Alternatively, the top cap assembly 10 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the top cap assembly 10 is not easily deformed when being impacted by extrusion, and the battery cell 1 has a higher structural strength, and the safety performance is improved. The cap assembly 10 may be provided with functional parts such as an electrode terminal assembly and the like. The electrode terminal assembly may be used to be electrically connected with the electrode assembly 30 for outputting or inputting electric power of the battery cell 1. In some embodiments, a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold value may be further provided on the top cap assembly 10. The top cover assembly 10 may be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, insulation may also be provided on the inside of the cap assembly 10, which may be used to isolate electrical connection components within the housing 20 from the cap assembly 10 to reduce the risk of shorting. By way of example, the insulation may be plastic, rubber, or the like.
In some embodiments, the roof assembly 10 may include a roof sheet 11 and other components disposed on the roof sheet 11. For example, when the battery cell 1 is assembled, it is generally necessary to inject the electrolyte into the battery cell 1, and thus, in some embodiments, the top sheet 11 is provided with a liquid injection port 111 to inject the electrolyte into the case 20. After the injection of the electrolyte is completed, the injection port 111 is sealed by the sealing nail 14, thereby ensuring the sealability inside the battery cell 1.
The case 20 is an assembly for cooperating with the cap assembly 10 to form an internal environment of the battery cell 1, wherein the formed internal environment may be used to accommodate the electrode assembly 30, the electrolyte, and other components. The case 20 and the top cap assembly 10 may be separate members, and an opening may be provided in the case 20, and the interior of the battery cell 1 may be formed by covering the opening with the top cap assembly 10 at the opening. However, the top cover assembly 10 and the housing 20 may be integrated, and in particular, the top cover assembly 10 and the housing 20 may form a common connection surface before other components are put into the housing, and when the interior of the housing 20 needs to be sealed, the top cover assembly 10 is then covered with the housing 20. The housing 20 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 20 may be determined according to the specific shape and size of the electrode assembly 30. The material of the housing 20 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.
The electrode assembly 30 is a component in which electrochemical reactions occur in the battery cell 1. One or more electrode assemblies 30 may be contained within the case 20. The electrode assembly 30 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having active material constitute the main body portion of the cell assembly, and the portions of the positive electrode sheet and the negative electrode sheet having no active material constitute the tab 30a, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 30a is connected to the electrode terminal to form a current loop.
In the technical scheme of this application embodiment, through set up bellying and/or recess in the top cap piece towards electrode assembly's one side, reduce under the scene of inversion that electrolyte flows to the top cap piece's way, increase electrolyte and flow to the degree of difficulty of top cap piece, consequently can alleviate electrolyte along top cap piece flow to top cap-casing welding seam to a certain extent to alleviate the problem that the welding seam corrodes.
Referring to fig. 4, fig. 4 shows that according to some embodiments of the present application, the top cap assembly 10 further includes an insulating member 12 disposed on a side of the top cap sheet 11 facing the electrode assembly 30, at least one fastening member 122 is disposed on the insulating member 12, the fastening member 122 is a closed structure on a side facing away from the electrode assembly, and an inner space of the closed structure is not communicated with a space of the top cap sheet 11 on a side facing away from the electrode assembly 30.
In the embodiment of the present application, an insulating member 12 is provided between the top cap sheet and the electrode assembly. In some embodiments, the insulator 12 may be a lower plastic piece that is capable of preventing electrochemical corrosion of the cell housing (e.g., aluminum case).
In some embodiments, the insulator 12 may comprise one or more of the following materials: special insulating materials (polysulfone, polyarylate, polytetrafluoroethylene, polyimide, etc.), general insulating materials (polystyrene, polypropylene, polyethylene, etc.), thermosetting plastics (polyurethane, furan, allyl ester, phenolic, unsaturated polyester, organosilicon, aminoplast, etc.), engineering plastics (polycarbonate, thermoplastic polyester, nylon, modified polyphenylene oxide, thermoplastic polyester, etc.).
In some embodiments, the insulator 12 may be a PPS plastic, with PPS having excellent high temperature, corrosion, radiation, flame, balanced physical and mechanical properties, and excellent dimensional stability, as well as excellent electrical properties. Therefore, the service life of the upper plastic part manufactured by the material can be prolonged. In the embodiments of the present application, the shoulders of the two ends of the insulator 12 are provided with a hanging or top bracket, and in some embodiments, the catch 122 is a hole/slot structure.
The structure that is different from buckle position and top cap piece in the current design for the cavity connection, the downthehole chamber is connecting the top cap piece, and the embodiment of this application is through the inside design of buckle spare position with the insulating part for enclosed construction to the inner space is not connected with the space of the one side that the top cap piece deviates from electrode assembly, alleviates electrolyte and flows to the top cap piece from buckle spare position.
Fig. 5 is a schematic partial structure of a through hole of an insulating member according to some embodiments of the present application. According to some embodiments of the present application, the insulating member 12 includes a second surface 12a facing one side of the electrode assembly 30 and at least one through hole 121 extending in the thickness direction Z of the cap assembly 10, the at least one through hole 121 being provided at least a partial edge of one end on the second surface 12a with a second protrusion 1211 protruding in the thickness direction Z of the cap assembly 10, and/or the at least one through hole 121 being provided at least a partial edge of one end on the second surface 12a with a second groove 1212 recessed in the thickness direction Z of the cap assembly 10.
In an embodiment of the present application, at least one through hole 121 on the insulating member 12 may be a liquid injection port for injecting an electrolyte into the electrode assembly of the battery cell. When the assembly of the components of the battery cell is completed, the position of the through hole 121 on the insulating member 12 corresponds to the position of the liquid injection port 111 on the top cover sheet 11 in the thickness direction Z of the top cover assembly, that is, the electrolyte may be injected into the case 20 of the battery cell 1 through the liquid injection port 111 on the top cover sheet 11 and the through hole 121 on the insulating member 12 in sequence.
In some examples, the manner in which the protrusions and grooves are formed may include, but is not limited to: welding, plastic forming, casting, cutting, stamping, injection molding, rotational molding, extrusion molding, thermoforming, compression molding, casting molding, hollow molding, drawing molding, and the like.
In the present design, the through hole 121 on the insulating member 12 is different from the boss-free design, and in the present application, the protruding portion and/or the groove are arranged at the outer edge of the liquid injection port on the insulating member, so that the electrolyte can flow out from the liquid injection port in an inverted scene, flow to the top cover plate and corrode the welding seam.
According to some embodiments of the present application, the top surface of first boss 112 and/or second boss 1211 is beveled such that the height of the outer sidewall of first boss 112 and/or second boss 1211 is greater than the height of the inner sidewall.
In some examples, the second boss of the lower plastic arrangement may be a bulk material, or may be a material including, but not limited to: special insulating materials (polysulfone, polyarylate, polytetrafluoroethylene, polyimide, etc.), general insulating materials (polystyrene, polypropylene, polyethylene, etc.), thermosetting plastics (polyurethane, furan, allyl ester, phenolic, unsaturated polyester, organosilicon, aminoplast, etc.), engineering plastics (polycarbonate, thermoplastic polyester, nylon, modified polyphenylene oxide, thermoplastic polyester, etc.).
The top surfaces of the first protruding parts and/or the second protruding parts are designed to be inclined planes, so that electrolyte with large faces of the aluminum shell can flow to the insulating part and the top cover sheet, and the electrolyte with large faces dripping is prevented from flowing to the welding seam area along the large faces of the shell, so that the welding seam is corroded, and meanwhile, the strength of the welding seam is enhanced.
According to some embodiments of the present application, the first protrusion 112 extends along the entire peripheral edge of the first surface 11a to form a closed loop, and/or the first groove 113 extends along the inside of the entire peripheral edge of the first surface 11a to form a closed loop.
In some embodiments of the present application, the first protrusion and/or the first groove may be provided along a top cover sheet and/or an insulator edge in a width direction of the top cover sheet, and may be provided along a top cover sheet and/or an insulator edge in a length direction of the top cover sheet. In some examples, the first protrusion and/or the first recess may be provided continuously or intermittently.
When the first protrusion and/or the first groove are continuously provided to form a closed loop, it is possible to maximally block the flow of the electrolyte to the weld.
According to some embodiments of the present application, the second protrusion 1211 extends along the entire edge of the end of the through-hole 121 on the second surface 12a to form a closed loop, and/or the second groove 1212 extends along the entire edge of the end of the through-hole 121 on the second surface 12a to form a closed loop.
In some embodiments of the present application, the second protrusion and/or the second groove may be provided along a top cover sheet and/or an insulator edge in a width direction of the top cover sheet, and may be provided along a top cover sheet and/or an insulator edge in a length direction of the top cover sheet. In some examples, the second protrusion and/or the second groove may be provided continuously or intermittently.
When the second protrusion and/or the second groove are continuously provided to form a closed loop, it is possible to maximally block the flow of the electrolyte to the weld.
According to some embodiments of the present application, the top cover sheet 11 has a length direction X and a width direction Y, a ratio of a dimension of any section of the first protruding portion 112 extending in the width direction Y in the length direction X to a dimension of the top cover sheet 11 in the length direction X is equal to or less than 0.1, and/or a ratio of a dimension of any section of the first protruding portion 112 extending in the length direction X in the width direction Y to a dimension of the top cover sheet 11 in the width direction Y is equal to or less than 0.1.
In some examples, the ratio of the dimension of any section of the first boss 112 extending in the width direction Y in the length direction X to the dimension of the top cover sheet 11 in the length direction X may be 0.002 or more and 0.03 or less. In some examples, the ratio of the dimension of any section of the first boss 112 extending in the length direction X in the width direction Y to the dimension of the top cover sheet 11 in the width direction Y may be 0.01 or more and 0.05 or less.
By providing the widths of the first and second bosses, assembly can be facilitated to the greatest extent and electrolyte flow out of the corrosion weld can be relieved to the greatest extent.
According to some embodiments of the present application, the first protrusion 112 has a rounded or chamfered corner at the top edge and/or the first recess 113 has a rounded or chamfered corner at the bottom edge.
By providing rounded corners or chamfers, the assembly and the assembly between the top cap assembly and the electrode assembly and the case can be facilitated, and the stress concentration of the top cap sheet at the top edge during the manufacturing can be reduced.
According to some embodiments of the present application, the dimension between the outer sidewall and the inner sidewall of the first protrusion is different or the same at different heights of the first protrusion, and/or the dimension between the outer sidewall and the inner sidewall of the first groove is different or the same at different depths of the first groove.
In some embodiments, the first protruding portion may be a boss with a uniform outer dimension, or may be a step with a non-uniform outer dimension such as a gradual/non-gradual change, a step with a conical shape, or the like. In some embodiments, the first groove may be a groove with uniform inner dimension, or may be a groove with nonuniform inner dimension such as gradual change/non-gradual change, such as inverted prismatic table, inverted cone, or the like.
The dimension between the outer side wall and the inner side wall of the first protruding portion is different or the same at different heights of the first protruding portion, and/or the dimension between the outer side wall and the inner side wall of the first groove is different or the same at different depths of the first groove, so that the connecting and mounting between the connecting and mounting device and other components can be flexibly applied.
According to some embodiments of the present application, the second protrusion 1211 has a rounded or chamfered corner at the top edge and/or the second groove 1212 has a rounded or chamfered corner at the bottom edge.
By providing rounded corners or chamfers, the assembly and installation between the top cap assembly and the electrode assembly and the case can be facilitated, and the stress concentration of the insulating member at the top edge during manufacture can be reduced.
According to some embodiments of the present application, the dimension between the outer side wall and the inner side wall of the second protrusion 1211 is different or the same at different heights of the second protrusion 1211 and/or the dimension between the outer side wall and the inner side wall of the second groove 1212 is different or the same at different depths of the second groove 1212.
In some embodiments, the second protruding portion may be a boss with a uniform outer dimension, or may be a step with a non-uniform outer dimension such as a gradual/non-gradual change, a step with a conical shape, or the like. In some embodiments, the second groove may be a groove with a uniform inner dimension, or may be a groove with a non-uniform inner dimension such as a gradual/non-gradual change, such as an inverted prismatic table, an inverted cone, or the like.
By making the dimension between the outer side wall and the inner side wall of the second boss different or the same at different heights of the second boss and/or the dimension between the outer side wall and the inner side wall of the second groove different or the same at different depths of the second groove, flexible application to connection and installation with other components is enabled.
An embodiment of the present application provides a battery comprising a battery cell according to any one of the above embodiments.
Referring to fig. 6, fig. 6 is an exploded view of a battery according to some embodiments of the present disclosure. The battery 100 includes a case 102 and a battery cell 1, and the battery cell 1 is accommodated in the case 102. The case 102 is used to provide an accommodating space for the battery cell 1, and the case 102 may have various structures. In some embodiments, the case 102 may include a first portion 1121 and a second portion 1122, the first portion 1121 and the second portion 1122 being overlapped with each other, the first portion 1121 and the second portion 1122 together defining an accommodating space for accommodating the battery cell 1. The second portion 1122 may be a hollow structure with one end opened, the first portion 1121 may be a plate-shaped structure, and the first portion 1121 is covered on the opening side of the second portion 1122, so that the first portion 1121 and the second portion 1122 together define an accommodating space; the first portion 1121 and the second portion 1122 may be hollow structures each having an opening at one side, and the opening side of the first portion 1121 is engaged with the opening side of the second portion 1122. Of course, the case 102 formed by the first portion 1121 and the second portion 1122 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.
In the battery 100, the number of the battery cells 1 may be plural, and the plurality of battery cells 1 may be connected in series, parallel, or series-parallel, where series-parallel refers to both of the plurality of battery cells 1 being connected in series and parallel. The plurality of battery cells 1 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 1 is accommodated in the box 102; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 1 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 102. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 1.
Wherein each battery cell 1 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 1 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.
The battery cell according to the above embodiment is included in the battery, improving the problem of corrosion of the weld by electrolyte flowing out of the top sheet. The specific construction and function of the cap assembly have been specifically described above, and for the sake of brevity, will not be repeated here.
The embodiment of the application provides an electricity utilization device, which comprises the battery according to any one of the embodiments, and the battery is used for providing electric energy.
The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.
For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a vehicle according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.
In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.
The battery cell disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. The power supply system with the battery cells, batteries and the like disclosed by the application can be used for forming the power utilization device, so that the problems of electrolyte corrosion top cover plates and welding seams of a top cover assembly and a shell are relieved and improved, and the stability of battery performance and the service life of the battery are improved.
The power consuming device is powered using the battery 200 of the above embodiment including the battery cells. The specific construction and function of the battery 200 have been specifically set forth above.
Referring to fig. 1 to 3, fig. 1 is an exploded view of a battery cell according to some embodiments of the present application, fig. 2 is an exploded view of a top cap assembly according to some embodiments of the present application, and fig. 3 is a view of a top sheet according to some embodiments of the present application. The embodiment provides a battery cell 1, and the battery cell 1 includes a case 20, an electrode assembly 30, and a top cap assembly 10. The case 20 has a receiving cavity and an end portion has an opening, the electrode assembly 30 is disposed in the receiving cavity of the case 20, the cap assembly 10 is disposed in the opening of the case 20 and includes a cap sheet 11, and the cap sheet 11 includes a first surface 11a facing a side of the electrode assembly 30. In some embodiments, the top cover sheet 11 is provided with a first groove 113 recessed in the thickness direction Z of the top cover assembly 10 at or inside at least part of the peripheral edge of the first surface 11a. In some embodiments, the top cover sheet 11 is provided with a first protrusion 112 protruding in the thickness direction Z of the top cover assembly 10 at or inside at least part of the peripheral edge of the first surface 11a, and the top cover sheet 11 is provided with a first groove 113 recessed in the thickness direction Z of the top cover assembly 10 at or inside at least part of the peripheral edge of the first surface 11a.
In some possible embodiments, the top cap assembly 10 further includes an insulating member 12 disposed on a side of the top cap sheet 11 facing the electrode assembly 30, at least one fastening member 122 is disposed on the insulating member 12, and the fastening member 122 is a closed structure on a side facing away from the electrode assembly, and an inner space of the closed structure is not communicated with a space of the top cap sheet 11 on a side facing away from the electrode assembly 30.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (13)
1. A battery cell (1), characterized by comprising:
a housing (20) having a receiving chamber and an end having an opening;
an electrode assembly (30) disposed in the housing chamber of the case (20);
a cap assembly (10) disposed at the opening of the case (20) and including a cap sheet (11), the cap sheet (11) including a first surface (11 a) facing a side of the electrode assembly (30),
wherein the top cover sheet (11) is provided with a first groove (113) recessed in a thickness direction (Z) of the top cover assembly (10) at or inside at least part of the peripheral edge of the first surface (11 a); or alternatively
Wherein the top cover sheet (11) is provided with a first protrusion (112) protruding in the thickness direction (Z) of the top cover assembly (10) at or inside at least part of the peripheral edge of the first surface (11 a), and the top cover sheet (11) is provided with a first groove (113) recessed in the thickness direction (Z) of the top cover assembly (10) at or inside at least part of the peripheral edge of the first surface (11 a).
2. The battery cell (1) according to claim 1, wherein the top cap assembly (10) further comprises an insulating member (12) arranged on one side of the top cap sheet (11) facing the electrode assembly (30), at least one clamping member (122) is arranged on the insulating member (12), one side of the clamping member (122) facing away from the electrode assembly (30) is a closed structure, and an inner space of the closed structure is not communicated with a space of one side of the top cap sheet (11) facing away from the electrode assembly (30).
3. The battery cell (1) according to claim 2, wherein the insulating member (12) includes a second surface (12 a) facing one side of the electrode assembly (30) and at least one through hole (121) extending in the thickness direction (Z) of the top cap assembly (10), the at least one through hole (121) being provided at least a partial edge of one end on the second surface (12 a) with a second protrusion (1211) protruding in the thickness direction (Z) of the top cap assembly (10), and/or the at least one through hole (121) being provided at least a partial edge of one end on the second surface (12 a) with a second groove (1212) recessed in the thickness direction (Z) of the top cap assembly (10).
4. A battery cell (1) according to claim 3, wherein the top surface of the first protrusion (112) and/or the second protrusion (1211) is beveled such that the height of the outer side wall of the first protrusion (112) and/or the second protrusion (1211) is greater than the height of the inner side wall.
5. The battery cell (1) according to any one of claims 1 to 4, wherein the first protrusion (112) extends along the entire peripheral edge of the first surface (11 a) to form a closed loop, and/or the first groove (113) extends along the inside of the entire peripheral edge of the first surface (11 a) to form a closed loop.
6. The battery cell (1) according to claim 3 or 4, wherein the second protrusion (1211) extends along the entire edge of one end of the through hole (121) on the second surface (12 a) to form a closed loop, and/or the second groove (1212) extends along the entire edge of one end of the through hole (121) on the second surface (12 a) to form a closed loop.
7. The battery cell (1) according to any one of claims 1 to 4, wherein the top cover sheet (11) has a length direction (X) and a width direction (Y), a ratio of a dimension of any section of the first protruding portion (112) extending in the width direction (Y) in the length direction (X) to a dimension of the top cover sheet (11) in the length direction (X) is 0.1 or less, and/or a ratio of a dimension of any section of the first protruding portion (112) extending in the length direction (X) in the width direction (Y) to a dimension of the top cover sheet (11) in the width direction (Y) is 0.1 or less.
8. The battery cell (1) according to any one of claims 1 to 4, wherein the first protrusion (112) has a rounded or chamfered corner at a top edge and/or the first groove (113) has a rounded or chamfered corner at a bottom edge.
9. The battery cell (1) according to any one of claims 1 to 4, wherein the dimension between the outer side wall and the inner side wall of the first protrusion (112) is different or the same at different heights of the first protrusion (112) and/or the dimension between the outer side wall and the inner side wall of the first groove (113) is different or the same at different depths of the first groove (113).
10. The battery cell (1) according to claim 3 or 4, wherein the second protrusion (1211) has a rounded or chamfered corner at the top edge and/or the second groove (1212) has a rounded or chamfered corner at the bottom edge.
11. The battery cell (1) according to claim 3 or 4, wherein the dimension between the outer side wall and the inner side wall of the second protrusion (1211) is different or the same at different heights of the second protrusion (1211) and/or the dimension between the outer side wall and the inner side wall of the second groove (1212) is different or the same at different depths of the second groove (1212).
12. A battery comprising the battery cell according to any one of claims 1 to 11.
13. An electrical device, characterized in that it comprises a battery according to claim 12 for providing electrical energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322881441.4U CN220400740U (en) | 2023-10-26 | 2023-10-26 | Battery monomer, battery and power consumption device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322881441.4U CN220400740U (en) | 2023-10-26 | 2023-10-26 | Battery monomer, battery and power consumption device |
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| CN220400740U true CN220400740U (en) | 2024-01-26 |
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