CN218867237U - Shell, battery monomer, battery and consumer - Google Patents
Shell, battery monomer, battery and consumer Download PDFInfo
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- CN218867237U CN218867237U CN202222736158.8U CN202222736158U CN218867237U CN 218867237 U CN218867237 U CN 218867237U CN 202222736158 U CN202222736158 U CN 202222736158U CN 218867237 U CN218867237 U CN 218867237U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The embodiment of the application provides a shell, a single battery, a battery and electric equipment, and relates to the technical field of batteries. The housing includes a first portion and a second portion. The first portion includes a first wall portion, a second wall portion, and a third wall portion connected in this order, the first wall portion being disposed opposite the third wall portion, the first portion having an opening disposed along edges of the first wall portion and the third wall portion. The second portion is used for closing the opening, and the first portion and the second portion jointly define a containing space for containing the electrode assembly. The shell can form a three-dimensional opening, the risk that the outermost side diaphragm of the electrode assembly is scratched by the opening is reduced, and the shell entering yield is improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a shell, a battery monomer, a battery and electric equipment.
Background
With the development of new energy technology, batteries are widely applied to electric devices, such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like.
In the production process of the battery cell, a case-entering process is included, namely, the electrode assembly is assembled into the case. The existing shell is inconvenient for assembling the electrode assembly into the shell, and the shell entering yield of the electrode assembly is reduced. Therefore, it is an important technical problem to improve the yield of the electrode assembly in the battery production.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a shell, battery monomer, battery and consumer, this shell can improve electrode subassembly income shell yield.
In a first aspect, embodiments of the present application provide a housing, including a first portion and a second portion. The first portion includes a first wall portion, a second wall portion, and a third wall portion connected in this order, the first wall portion being disposed opposite the third wall portion, the first portion having an opening disposed along edges of the first wall portion and the third wall portion. The second portion is used for closing the opening, and the first portion and the second portion jointly define a containing space for containing the electrode assembly.
In the above aspect, the first wall portion and the third wall portion may be spaced apart by the second wall portion, so that the edges of the first wall portion and the third wall portion may form the opening. When the electrode assembly is assembled into the first part, the electrode assembly only contacts the first wall part and the third wall part, the risk that the outermost diaphragm of the electrode assembly is scratched by the opening is reduced, and the yield of casing is improved.
In some embodiments, the openings include a first opening, a second opening, and a third opening, the first wall portion and the third wall portion are disposed opposite each other along a first direction, the first opening and the third opening are disposed opposite each other along a second direction, the second opening and the second wall portion are disposed opposite each other along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other. The second portion is for closing the first opening, the second opening and the third opening.
In the above aspect, the first opening, the second opening, and the third opening collectively form a solid opening, and when the electrode assembly is housed, the electrode assembly can be fitted into the case from any one of the first opening, the second opening, and the third opening, increasing flexibility when the electrode assembly is housed.
In some embodiments, the second portion includes a fourth wall portion, a fifth wall portion, and a sixth wall portion connected in series, the fourth wall portion and the sixth wall portion being disposed opposite to each other in the second direction, the fourth wall portion, the fifth wall portion, and the sixth wall portion being configured to close the first opening, the second opening, and the third opening, respectively.
In the above aspect, when the second portion is connected to the first portion, the fourth wall portion closes the first opening, the fifth wall portion closes the second opening, and the sixth wall portion closes the third opening, so that the first portion and the second portion may form an accommodating space isolated from the outside, thereby providing a closed operating environment for the electrode assembly.
In some embodiments, the first wall portion is spaced apart from the third wall portion by a distance L along the first direction 1 . The distance between the fourth wall part and the sixth wall part along the second direction is L 2 . The distance between the second wall part and the fifth wall part along the second direction is L 3 。L 1 、L 2 And L 3 Satisfies the following conditions: l is 1 ＜L 2 ，L 1 ＜L 3 。
In the above scheme, when L 1 ＜L 2 And L is 1 ＜L 3 And, the case is made to be suitable for a thin battery cell. And, when L 1 ＜L 2 And L is 1 ＜L 3 When the plurality of battery cells are stacked, the electrode terminal pitch between the battery cells is small, and connection is facilitated.
In some embodiments, the first wall portion and the second wall portion are connected by a first radiused wall and the third wall portion and the second wall portion are connected by a second radiused wall. The fourth wall portion and the fifth wall portion are connected by a third fillet wall, and the sixth wall portion and the fifth wall portion are connected by a fourth fillet wall. The radius of the first radiused wall inner surface is less than the radius of the third radiused wall inner surface and the radius of the fourth radiused wall inner surface. The radius of the second radiused inner surface is less than the radius of the third radiused inner surface and the radius of the fourth radiused inner surface.
In the above aspect, two wall portions connected to each other among the plurality of wall portions are transitioned by the fillet wall, which increases the connection strength between the two wall portions connected by the fillet wall. And when the plurality of fillet walls meet the condition that the radius of the inner surface of the first fillet wall is smaller than the radius of the inner surface of the third fillet wall and the radius of the inner surface of the fourth fillet wall, and the radius of the inner surface of the second fillet wall is smaller than the radius of the inner surface of the third fillet wall and the radius of the inner surface of the fourth fillet wall, on one hand, the third fillet wall and the fourth fillet wall reduce the occupied accommodating space inside the shell, and the energy density of the battery monomer is improved. On the other hand, first fillet wall and second fillet wall have increased the joint strength of fourth wall portion, fifth wall portion and sixth wall portion, and then have improved the holistic structural strength of shell.
In some embodiments, the radius of the first radiused wall inner surface is equal to the radius of the second radiused wall inner surface; and/or the radius of the inner surface of the third fillet wall is equal to the radius of the inner surface of the fourth fillet wall.
In the above scheme, when the radius of the inner surface of the first circular bead wall is equal to the radius of the inner surface of the second circular bead wall, the overall strength of the first portion is improved. When the radius of the inner surface of the third radiused wall is equal to the radius of the inner surface of the fourth radiused wall, the overall strength of the second portion is improved.
In some embodiments, the first portion and/or the second portion comprise stainless steel.
In the scheme, the stainless steel material has higher strength and fatigue strength, and on one hand, the wall thickness of the shell formed by the first part and the second part is reduced, so that the electrode assembly with larger size can be accommodated in the shell, and the energy density of the battery cell is improved.
In some embodiments, the first wall portion is provided with a first edge portion extending along an edge of the first wall portion, the first edge portion being for connecting the second portion.
In the above aspect, the first edge portion increases a contact area of the first wall portion and the second portion, thereby increasing a connection strength of the first portion and the second portion.
In some embodiments, the first edge portion protrudes from an inner surface or an outer surface of the first wall portion.
In the above scheme, when the first edge protrudes out of the outer surface of the first wall, the joint of the first wall and the second portion is located outside the case, so that the occupation of the internal space of the case is reduced, the electrode assembly with a larger size can be accommodated in the case, and the energy density of the battery cell is improved. When the first edge protrudes out of the inner surface of the first wall part, the outline of the shell formed by the first part and the second part is regular, and a plurality of battery cells are arranged in a stacked mode conveniently.
In some embodiments, the third wall part is provided with a third edge extending along an edge of the third wall part, the third edge being for connecting the second part.
In the above aspect, the third edge portion increases a contact area of the third wall portion and the second portion, thereby increasing a connection strength of the first portion and the second portion.
In some embodiments, the third edge portion protrudes from an inner or outer surface of the third wall portion.
In the above scheme, when the third edge protrudes out of the outer surface of the third wall, the joint of the third wall and the second portion is located outside the case, so that the occupation of the internal space of the case is reduced, an electrode assembly with a larger size can be accommodated in the case, and the energy density of the battery cell is improved. When the third edge portion protrudes out of the inner surface of the third wall portion, the outline of the shell formed by the first portion and the second portion is regular, and the plurality of battery cells are arranged in a stacked mode conveniently.
In some embodiments, the first wall portion and the third wall portion are disposed opposite to each other along a first direction, and the second wall portion has two opposite first edges along a second direction perpendicular to the first direction. At least one of the first edges is provided with a second edge portion for connecting the second part.
In the above aspect, the second edge portion increases a contact area of the second wall portion and the second portion, thereby increasing a connection strength of the first portion and the second portion.
In some embodiments, the second edge portion protrudes from an inner or outer surface of the second wall portion.
In the above scheme, when the second edge portion protrudes out of the outer surface of the second wall portion, the joint of the second wall portion and the second portion is located outside the case, so that the occupation of the internal space of the case is reduced, the electrode assembly with a larger size can be accommodated in the case, and the energy density of the battery cell is improved. When the second edge portion protrudes out of the inner surface of the second wall portion, the outline of the shell formed by the first portion and the second portion is regular, and the plurality of battery cells are conveniently stacked.
In some embodiments, the housing is a cuboid.
In the above scheme, the rectangular frame body is convenient for a plurality of battery monomers to be stacked to form a battery pack, so that the space utilization rate is improved, and the rectangular frame body is simple in structure and convenient to process and manufacture.
In a second aspect, embodiments of the present application provide a battery cell, which includes a case and an electrode assembly in the foregoing embodiments. The electrode assembly is accommodated in the case.
In some embodiments, the first or second portion has a mounting portion provided with a lead-out hole penetrating the mounting portion in a thickness direction thereof. The battery cell further comprises an electrode terminal, the electrode terminal is electrically connected with the electrode assembly, the electrode terminal comprises a terminal body, a first limiting portion and a second limiting portion, the terminal body is arranged in the leading-out hole in a penetrating mode, the first limiting portion and the second limiting portion are connected to the two ends of the terminal body respectively along the thickness direction of the mounting portion, and the first limiting portion and the second limiting portion are located on the two sides of the mounting portion respectively to fix the terminal body.
In the above scheme, the terminal body is used for leading the electric energy of the electrode assembly out of the shell, the terminal body is fixed on the wall part under the action of the first limiting part and the second limiting part, the terminal body and the wall part do not need to be welded, and the risk that the frame body is welded through to cause damage to the frame body structure during welding is avoided.
In some embodiments, the battery cell further includes a current collecting member connecting the electrode terminal and the electrode assembly. The current collecting member is provided with a second leading-out hole, the terminal body penetrates through the second leading-out hole, the first limiting portion is located in the shell along the thickness direction of the mounting portion, and at least part of the current collecting member is located between the first limiting portion and the mounting portion.
In the above scheme, the current collecting member is used for electrically connecting the electrode terminal and the electrode assembly, and the current collecting member is clamped between the first limiting part and the wall part so as to be fixed on the electrode terminal, so that the assembly process is simplified, and the production efficiency is improved.
In a third aspect, an embodiment of the present application provides a battery, including the battery cell in the foregoing embodiments.
In a fourth aspect, an embodiment of the present application provides an electric device, which includes the battery in the foregoing embodiment.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:
FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;
fig. 2 is an exploded view of a battery provided by some embodiments of the present application;
FIG. 3 is a schematic illustration of a housing structure provided in some embodiments of the present application;
FIG. 4 is an enlarged view of FIG. 3 at A;
FIG. 5 is a first partial block diagram provided in accordance with certain embodiments of the present disclosure;
FIG. 6 is a schematic view of a distribution of first, second and third openings provided in some embodiments of the present application;
FIG. 7 is a schematic structural view of a second portion provided in some embodiments of the present application;
FIG. 8 is a schematic front view of a housing according to some embodiments of the present application;
FIG. 9 is a side view schematic of the housing provided in some embodiments of the present application;
FIG. 10 is a partial schematic structural view of a second portion provided in accordance with certain embodiments of the present disclosure;
FIG. 11 is a partial schematic structural view of a first portion provided in accordance with certain embodiments of the present application;
FIG. 12 is a schematic view of a first edge portion and a third edge portion arrangement provided in accordance with some embodiments of the present application;
FIG. 13 is an enlarged view at B of FIG. 12;
FIG. 14 is a schematic view of a first edge portion and a third edge portion according to further embodiments of the present application;
FIG. 15 is an enlarged view at C of FIG. 14;
FIG. 16 is a schematic view of a second lip portion arrangement provided by some embodiments of the present application;
FIG. 17 is a schematic view of a second edge portion arrangement according to further embodiments of the present application;
fig. 18 is a schematic view of an electrode terminal structure according to some embodiments of the present disclosure.
The reference numbers in the detailed description are as follows:
10-a box body; 11-a first enclosure; 12-a second enclosure; 20-a battery cell; 21-a first part; 211-a first wall portion; 2111-first edge portion; 2112-first rounded wall; 212-a second wall portion; 2121-second edge portion; 213-a third wall portion; 2131-a third edge portion; 2132-a second rounded wall; 214-a first opening; 215-a second opening; 216-a third opening; 22-a second part; 221-a fourth wall portion; 2221-third rounded wall; 222-a fifth wall portion; 223-a sixth wall portion; 2231-a fourth rounded wall; 23-a first insulator; 24-a second insulator; 25-an electrode terminal; 251-a second limiting portion; 252-a terminal body; 253-a first limiting part; 26-a current collecting member; 27-an electrode assembly; 100-a battery; 200-a controller; 300-a motor; 1000-vehicle.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.
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 "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more, and similarly, "plural sets" refers to two or more sets, and "plural pieces" refers to two or more pieces.
In the description of the embodiments of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, and are used for convenience in describing the embodiments of the present application and for simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.
In the embodiments of the present application, like reference numerals denote like parts, and a detailed description of the same parts is omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.
A typical battery cell typically includes a housing, an electrode assembly, and an end cap assembly. The case has an opening through which the electrode assembly is fed into the case during assembly of the battery cell. The electrode assembly is accommodated in the case, and the end cap covers the opening of the case to isolate the internal environment of the battery cell from the external environment.
The inventors have found that, since the opening is usually formed on one of the side walls of the case, the electrode assembly is not easily accommodated in the case due to the small opening during the assembly of the electrode assembly into the case. Secondly, because the opening edge of the shell is sharp, when the electrode assembly is in contact with the opening in the shell entering process, the diaphragm at the outermost side of the electrode assembly is easily scraped, and the single battery is caused to generate a short circuit hidden trouble.
Based on the above problems in the prior art, the inventors have conducted extensive studies to design a housing including a first portion and a second portion. The first portion comprises a first wall portion, a second wall portion and a third wall portion which are connected in sequence, the first wall portion and the third wall portion are arranged oppositely, the first portion is provided with an opening, and the opening is arranged along the edges of the first wall portion and the third wall portion. The second portion is used for closing the opening, and the first portion and the second portion jointly define a containing space for containing the electrode assembly.
The shell can reduce the risk that the outermost side diaphragm of the electrode assembly is scratched by the opening, and the shell entering yield is improved.
The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric 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 automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.
For convenience of description, the following embodiments are described by taking an electric device as an example of a vehicle according to an embodiment of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The battery 100 is provided inside 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 serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for power requirements for operation during starting, navigation, and traveling of the vehicle 1000.
In some embodiments of the present application, the battery 100 may be used not only as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1000.
Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide a receiving space for the battery cells 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 cover each other, and the first housing 11 and the second housing 12 together define a receiving space for receiving the battery cell 20. The second case shell 12 can be a hollow structure with an opening at one end, the first case shell 11 can be a plate-shaped structure, and the first case shell 11 covers the opening side of the second case shell 12, so that the first case shell 11 and the second case shell 12 jointly define an accommodating space; the first case 11 and the second case 12 may be both hollow structures with one side open, and the open side of the first case 11 covers the open side of the second case 12. Of course, the first casing 11 and the second casing 12 may form the cabinet 10 in various shapes, for example, a cylinder, a rectangular parallelepiped, etc.
In the battery 100, the number of the battery cells 20 may be multiple, and the multiple battery cells 20 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the multiple battery cells 20. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery cells 20 is accommodated in the box body 10; of course, the battery 100 may also be formed by connecting a plurality of battery cells 20 in series, in parallel, or in series-parallel to form a battery module, and then connecting a plurality of battery modules in series, in parallel, or in series-parallel to form a whole, and accommodating the whole in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 20.
Wherein each battery cell 20 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery.
According to some embodiments of the present application, please refer to fig. 3, fig. 4 and fig. 5, fig. 3 is a schematic structural diagram of a housing provided in some embodiments of the present application, fig. 4 is an enlarged view of a portion a of fig. 3, fig. 5 is a schematic structural diagram of a first portion 21 provided in some embodiments of the present application, and an embodiment of the present application provides a housing including a first portion 21 and a second portion 22. The first portion 21 includes a first wall portion 211, a second wall portion 212, and a third wall portion 213 connected in this order, the first wall portion 211 being disposed opposite to the third wall portion 213, and the first portion 21 having an opening disposed along edges of the first wall portion 211 and the third wall portion 213. The second portion 22 is for closing the opening, and the first portion 21 and the second portion 22 together define a receiving space for receiving the electrode assembly 27.
The first wall portion 211, the second wall portion 212, and the third wall portion 213 are sequentially connected, the first wall portion 211 and the third wall portion 213 can be disposed opposite to each other by the second wall portion 212 to form a chamber having one side closed by the second wall portion 212 and the other sides opened, and an opening is formed between an edge of the first wall portion 211 not occupied by the second wall portion 212 and an edge of the third wall portion 213 not occupied by the second wall portion 212. Taking the example that the first wall portion 211 and the third wall portion 213 have four edges (in this case, the first wall portion 211 and the third wall portion 213 may be rectangular or trapezoidal), the first wall portion 211 and the third wall portion 213 have four edges, respectively, one of the four edges of the first wall portion 211 is connected to the second wall portion 212, one of the four edges of the third wall portion 213 is connected to the second wall portion 212, and an opening is formed between the other continuous three edges of the first wall portion 211 and the other continuous three edges of the third wall portion 213.
The first wall portion 211 and the third wall portion 213 may be both rectangular, and may be circular, triangular, pentagonal, or other planar patterns.
The first wall portion 211, the second wall portion 212, and the third wall portion 213 may be integrally formed, for example, the first portion 21 may be formed by bending one plate body twice. The first wall portion 211, the second wall portion 212, and the third wall portion 213 may be three independent plate bodies, which are sequentially connected to form the first portion 21.
The second portion 22 is used for closing the opening, and in actual use, the second portion 22 can cover the edge of the first portion 21 to close the opening. The second portion 22 may also be interposed between the first wall portion 211 and the third wall portion 213, connected to the second wall portion 212, such that the second portion 22, the first wall portion 211, the second wall portion 212, and the third wall portion 213 together define an accommodating space. The second portion 22 may also be a housing having an opening, and the first portion 21 is inserted into the second portion 22, and the second wall portion 212 closes the opening of the housing to form an accommodating space.
The yield rate of the battery pack is a ratio obtained by dividing the number of the battery cells 20, which are not damaged in the electrode assembly 27, by the number of all the battery cells 20 after the electrode assembly 27 is assembled into the case, and the yield rate of the battery pack is higher by reflecting the production quality of the battery cells 20 in the process of assembling the electrode assembly 27.
On the one hand, the first wall portion 211 and the third wall portion 213 may form a solid opening, which is increased in opening degree as compared to a planar opening, facilitating the assembly of the electrode assembly 27 into the interior of the first portion 21. Also, when the electrode assembly 27 is assembled into the first portion 21, the electrode assembly 27 contacts only the first wall portion 211 and the third wall portion 213, reducing the risk of the outermost separator of the electrode assembly 27 being scratched by the opening, improving the yield of case entry.
According to some embodiments of the present disclosure, please refer to fig. 6, fig. 6 is a distribution diagram of first openings 214, second openings 215, and third openings 216 provided in some embodiments of the present disclosure, in which the openings include the first opening 214, the second opening 215, and the third opening 216, the first wall portion 211 and the third wall portion 213 are disposed opposite to each other along a first direction, the first opening 214 and the third opening 216 are disposed opposite to each other along a second direction, the second opening 215 and the second wall portion 212 are disposed opposite to each other along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other. The second portion 22 is used to close the first opening 214, the second opening 215 and the third opening 216.
In the figure, the first direction may be a direction indicated by the Y axis, the second direction may be a direction indicated by the X axis, and the third direction may be a direction indicated by the Z axis.
The first wall portion 211 and the third wall portion 213 may have four edges, respectively, one of the four edges of the first wall portion 211 is connected to the second wall portion 212, one of the four edges of the third wall portion 213 is connected to the second wall portion 212, and an opening is formed between the other continuous three edges of the first wall portion 211 and the other continuous three edges of the third wall portion 213. In this case, the chamber has two openings, i.e., a first opening 214 and a third opening 216, formed on both sides in the X-axis direction, and one opening, i.e., a second opening 215, formed on one side in the Z-axis direction. The first opening 214, the second opening 215, and the third opening 216 communicate to collectively form an opening.
The first opening 214, the second opening 215, and the third opening 216 collectively form a solid opening, and the electrode assembly 27 can be fitted into the case from any one of the first opening 214, the second opening 215, and the third opening 216 when the electrode assembly 27 is fitted into the case, increasing flexibility in fitting the electrode assembly 27 into the first portion 21. Furthermore, the electrode assembly 27 can be assembled into the first portion 21 from the second opening 215, and both sides of the electrode assembly 27 close to the first opening 214 and the third opening 216 do not contact with the inner wall of the first portion 21, thereby reducing the risk of scraping the outermost separator of the electrode assembly 27 and improving the yield of packaging.
According to some embodiments of the present disclosure, please refer to fig. 7, fig. 7 is a schematic structural diagram of the second portion 22 according to some embodiments of the present disclosure, in which the second portion 22 includes a fourth wall 221, a fifth wall 222, and a sixth wall 223 connected in sequence, the fourth wall 221 and the sixth wall 223 are disposed opposite to each other along the second direction, and the fourth wall 221, the fifth wall 222, and the sixth wall 223 are respectively used to close the first opening 214, the second opening 215, and the third opening 216.
The fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 may be mutually independent wall portions, and a plurality of wall portions are connected by welding or bonding to form the second portion 22. The plurality of wall portions may also be integrally formed, for example, the second portion 22 may be formed by bending a plate body twice.
The shape of the connection of the fourth wall portion 221, the fifth wall portion 222 and the sixth wall portion 223 may be the same as the shape of the opening, for example, when the opening includes the first opening 214, the second opening 215 and the third opening 216, the first opening 214 and the third opening 216 are located on both sides of the second opening 215, forming a concave opening. The fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 may form a concave structure such that the fourth wall portion 221 may close the first opening 214, the fifth wall portion 222 may close the second opening 215, and the sixth wall portion 223 may close the third opening 216.
The fourth wall part 221 closes the first opening 214, the fifth wall part 222 closes the second opening 215, and the sixth wall part 223 closes the third opening 216, so that the first portion 21 and the second portion 22 can form a receiving space isolated from the outside, thereby providing a closed working environment for the electrode assembly 27.
According to some embodiments of the present disclosure, please refer to fig. 8 and 9, fig. 8 is a front view structural diagram of the housing according to some embodiments of the present disclosure, fig. 9 is a side view structural diagram of the housing according to some embodiments of the present disclosure, and a distance between the first wall portion 211 and the third wall portion 213 along the first direction is L 1 . The fourth wall part 221 and the sixth wall part 223 are spaced apart from each other by L in the second direction 2 . In the second direction, the second wall portion 212 is spaced apart from the fifth wall portion 222 by L3.L is a radical of an alcohol 1 、L 2 And L 3 Satisfies the following conditions: l is 1 ＜L 2 ，L 1 ＜L 3 。
L 1 The distance between two opposing surfaces of the first wall portion 211 and the third wall portion 213 may be, or the distance between two opposing surfaces of the first wall portion 211 and the third wall portion 213 may be. L is 2 The distance between the opposing surfaces of the fourth wall portion 221 and the sixth wall portion 223 may be, or the distance may be, between the opposing surfaces of the fourth wall portion 221 and the sixth wall portion 223The distance between the two opposing faces of the wall portion 221 and the sixth wall portion 223. L is 3 The distance between two opposing faces of the second wall portion 212 and the fifth wall portion 222 may be, and the distance between two opposing faces of the second wall portion 212 and the fifth wall portion 222 may be.
Taking the case where the first part 21 and the second part 22 form a cube as an example, L 1 May be one of the length, width or height of the housing, L 2 May be another of the length, width or height of the housing, L 2 May be yet another of the length, width or height of the housing. Or, L 1 May be one of a length, a width or a height of the accommodation space formed by the housing, L 2 May be the other of the length, width or height of the receiving space, L 2 May be still another one of the length, width or height of the receiving space.
When L is 1 ＜L 2 And L is 1 ＜L 3 When is, with L 1 For example, the housing is a thin plate structure with a height smaller than the length and the width, so that the housing can be applied to a thin battery cell, that is, the battery cell 20 with a thickness much smaller than the width and the length, thereby increasing the application range of the housing.
In this embodiment, L 1 、L 2 And L 3 May be L 1 ＜L 2 ＜L 3 May also be L 1 ＜L 3 ＜L 2 。
Furthermore, when L is 1 ＜L 2 And L is 1 ＜L 3 When one of the second wall part 212, the fourth wall part 221, the fifth wall part 222, or the sixth wall part 223 may be used to mount the electrode terminals 25 of the battery cells 20, when a plurality of battery cells 20 are stacked, the electrode terminals 25 between the battery cells 20 are spaced apart by a small distance, facilitating connection.
Referring to fig. 7 and 11, fig. 11 is a partial structural schematic view of the first portion 21 according to some embodiments of the present disclosure, in which the first wall portion 211 and the second wall portion 212 are connected by a first rounded wall 2112, and the third wall portion 213 and the second wall portion 212 are connected by a second rounded wall 2132. The fourth wall portion 221 and the fifth wall portion 222 are connected by a third rounded wall 2221, and the sixth wall portion 223 and the fifth wall portion 222 are connected by a fourth rounded wall 2231. The radius of the inner surface of the first radiused wall 2112 is less than the radius of the inner surface of the third radiused wall 2221 and the radius of the inner surface of the fourth radiused wall 2231. The radius of the inner surface of the second radiused wall 2132 is less than the radius of the inner surface of the third radiused wall 2221 and the radius of the inner surface of the fourth radiused wall 2231.
In this embodiment, between two connected wall portions, the fillet wall may be an arc-shaped plate body connecting the two wall portions, may also be a structure formed by bending an end of one of the wall portions, and may also be an arc chamfer formed by integrally forming the two wall portions and bending the two wall portions. Taking the first wall portion 211, the second wall portion 212, and the first fillet wall 2112 as an example, one end of the first wall portion 211 may be bent into an arc shape, and the end of the arc shape, which forms the first fillet wall 2112, is connected to the second wall portion 212; the first rounded wall 2112 may also be an arc-shaped plate, and both ends of the first rounded wall 2112 are connected to the first wall portion 211 and the second wall portion 212, respectively; the first wall portion 211, the second wall portion 212, and the first rounded wall 2112 may also be integrally formed.
Two consecutive wall portions pass through the transition of fillet wall, have both increased the joint strength between two wall portions of connecting through the fillet wall, make again can form the contained angle between two wall portions.
The radius of the inner surface of the first rounded wall 2112 being smaller than the radius of the inner surface of the third rounded wall 2221 and the radius of the inner surface of the fourth rounded wall 2231 means that the radius of the inner surface of the first rounded wall 2112 is smaller than the radius of the inner surface of the third rounded wall 2221 and the radius of the inner surface of the first rounded wall 2112 is smaller than the radius of the inner surface of the fourth rounded wall 2231.
The radii of the inner surfaces of the second and fourth fillet walls 2132 and 2231 are smaller than the radii of the inner surfaces of the third and fourth fillet walls 2221 and 2231, respectively, meaning that the radii of the inner surfaces of the second and fourth fillet walls 2132 and 2132 are smaller than the radii of the inner surfaces of the third and fourth fillet walls 2221 and 2231, respectively.
When the plurality of fillet walls satisfy the condition that the radius of the inner surface of the first fillet wall 2112 is smaller than the radius of the inner surface of the third fillet wall 2221 and the radius of the inner surface of the fourth fillet wall 2231, and the radius of the inner surface of the second fillet wall 2132 is smaller than the radius of the inner surface of the third fillet wall 2221 and the radius of the inner surface of the fourth fillet wall 2231, on the one hand, the third fillet wall 2221 and the fourth fillet wall 2231 reduce the occupied accommodating space inside the case, and improve the energy density of the battery cell 20. On the other hand, the first rounded wall 2112 and the second rounded wall 2132 increase the connection strength of the fourth wall 221, the fifth wall 222, and the sixth wall 223, thereby improving the structural strength of the entire housing.
According to some embodiments of the present application, the radius of the inner surface of the first fillet wall 2112 is equal to the radius of the inner surface of the second fillet wall 2132; and/or the radius of the inner surface of the third radiused wall 2221 is equal to the radius of the inner surface of the fourth radiused wall 2231.
The first radiused wall 2112, the second radiused wall 2132, the third radiused wall 2221 and the fourth radiused wall 2231 may have a relationship: the radius of the inner surface of the first radiused wall 2112 is equal to the radius of the inner surface of the second radiused wall 2132; also, the radius of the inner surface of the third radiused wall 2221 is equal to the radius of the inner surface of the fourth radiused wall 2231. The method can also comprise the following steps: the radius of the inner surface of the first rounded wall 2112 is equal to the radius of the inner surface of the second rounded wall 2132; alternatively, the radius of the inner surface of the third radiused wall 2221 is equal to the radius of the inner surface of the fourth radiused wall 2231.
The radius of the inner surface of the first radiused wall 2112 is equal to the radius of the inner surface of the second radiused wall 2132, which improves the overall strength of the first portion 21. The radius of the inner surface of the third radiused wall 2221 is equal to the radius of the inner surface of the fourth radiused wall 2231, increasing the overall strength of the second portion 22.
According to some embodiments of the present application, the first portion 21 and/or the second portion 22 comprise stainless steel.
In the present embodiment, both the first portion 21 and the second portion 22 may include stainless steel, or one of the first portion 21 and the second portion 22 may include stainless steel.
The first portion 21 and the second portion 22, including stainless steel, may be partially made of stainless steel or may be entirely made of stainless steel, for example, if the first portion 21 includes stainless steel, the first portion 21 may be made of stainless steel material as a whole or may be partially made of stainless steel material.
On the surface of the stainless steel, a coating layer may be further provided, for example, on the surfaces of the first and second portions 21 and 22, an insulating layer may be provided, so that the case is electrically insulated from the electrode assembly 27, improving the safety of the battery cell 20. The surfaces of the first part 21 and the second part 22 can be provided with nickel plating layers, and the nickel plating layers improve the wear resistance and corrosion resistance of the shell, so that the service life of the shell is prolonged.
The stainless steel material has high strength and fatigue strength, and on one hand, the wall thickness of the shell formed by the first part 21 and the second part 22 is reduced, so that the electrode assembly 27 with larger size can be accommodated in the shell, and the energy density of the battery unit 20 is improved. On the other hand, stainless steel has good corrosion resistance, and the service life of the shell is prolonged.
Referring to fig. 10, fig. 10 is a schematic partial structure view of the second portion 22 according to some embodiments of the present disclosure, and a thickness of the fourth wall 221 is L 7 The thickness of the fifth wall 222 is L 8 The thickness of the sixth wall 223 is L 9 L is not more than 50um 7 Less than or equal to 200um; and/or L is more than or equal to 50um 8 Less than or equal to 200um; and/or L is more than or equal to 50um 9 ≤200um。
If L 7 、L 8 Or L 9 Greater than 200um results in an excessive thickness of the second portion 22, and the smaller the volume of the receiving space formed by the housing without changing the size of the housing, the lower the energy density of the battery cell 20, and the increased weight of the battery cell 20.
If L 7 、L 8 Or L 9 Less than 50um reduces the strength of the second portion 22, which in turn reduces the strength of the housing.
In this embodiment, L may be 7 、L 8 And L 9 At the same time, is in the range of more than or equal to 50um and less than or equal to 200umMay be only L 7 、L 8 And L 9 Some of which satisfy the above range.
When L is 7 、L 8 And L 9 Is in the range of greater than or equal to 50um and less than or equal to 200um, the strength of the second part 22 is ensured, and the weight of the shell is reduced.
According to some embodiments of the present application, referring to fig. 11, the thickness of the first wall 211 is L 4 The thickness of the second wall portion 212 is L 5 The thickness of the third wall 213 is L 6 L is not more than 50um 4 Less than or equal to 200um; and/or L is more than or equal to 50um 5 Less than or equal to 200um; and/or L is more than or equal to 50um 6 ≤200um。
If L 4 、L 5 Or L 6 Greater than 200um results in an excessive thickness of the first portion 21, and the smaller the volume of the receiving space formed by the housing without changing the size of the housing, the lower the energy density of the battery cell 20, and the increased weight of the battery cell 20.
If L 4 、L 5 Or L 6 Less than 50um reduces the strength of the first portion 21 and thus the strength of the housing.
In this embodiment, L may be 4 、L 5 Or L 6 At the same time, in the range of more than or equal to 50um and less than or equal to 200um, only L can be used 4 、L 5 Or L 6 The above range is partially satisfied.
When L is 4 、L 5 Or L 6 When the thickness of (2) is in the range of more than or equal to 50um and less than or equal to 200um, the strength of the first part 21 is ensured, and the weight of the shell is reduced.
According to some embodiments of the present disclosure, please refer to fig. 12-15, fig. 12 is a schematic view of a first edge portion 2111 and a third edge portion 2131 provided in some embodiments of the present disclosure, fig. 13 is an enlarged view of B of fig. 12, fig. 14 is a schematic view of a first edge portion 2111 and a third edge portion 2131 provided in other embodiments of the present disclosure, fig. 15 is an enlarged view of C of fig. 14, the first wall portion 211 is provided with a first edge portion 2111, the first edge portion 2111 extends along an edge of the first wall portion 211, and the first edge portion 2111 is used to connect the second portion 22.
The first edge 2111 may be a flange disposed along an edge of the first wall 211, and the flange may extend in a first direction from the first wall 211 back to the third wall 213.
The first edge 2111 may be formed by thickening the edge of the first wall 211 in the first direction.
The first edge portion 2111 may be one or more, for example, in the embodiment where the first edge portion 2111 is a flange, the first edge portion 2111 may be a continuous flange, or may be a plurality of flange portions disposed along the edge of the first wall portion 211. For another example, in the embodiment where the first edge portion 2111 is formed by thickening the edge of the first wall portion 211, the edge of the first wall portion 211 may be entirely thickened or only the edge of the partition thickened portion may be thickened.
The first edge portion 2111 can increase the connection strength of the first portion 21 and the second portion 22, taking an embodiment in which the second portion 22 includes the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 connected in sequence as an example, when the second portion 22 is connected to the first portion 21, the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 can cover the edge of the first wall portion 211, and the first edge portion 2111 increases the contact area of the first wall portion 211, the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223, thereby increasing the connection strength of the first portion 21 and the second portion 22.
According to some embodiments of the present application, referring to fig. 13, the first edge portion 2111 protrudes from an outer surface of the first wall portion 211.
The outer surface of the first wall portion 211 refers to a surface of the first wall portion 211 facing away from the third wall portion 213.
When the first edge portion 2111 protrudes out of the outer surface of the first wall portion 211, the joint of the first portion 21 and the second portion 22 is located outside the cavity formed by the first portion 21, so that the occupation of the inner space of the first portion 21 is reduced, the electrode assembly 27 with a larger size can be accommodated in the first portion 21, and the energy density of the battery cell 20 is improved. Furthermore, when first portion 21 and second portion 22 are joined by a joining process (e.g., welding) that generates high temperatures, electrode assembly 27 is kept away from the heat source, reducing the risk of damage to electrode assembly 27 due to the high temperatures experienced.
According to other embodiments of the present application, referring to fig. 15, the first edge portion 2111 protrudes from the inner surface of the first wall portion 211.
The inner surface of the first wall portion 211 refers to a surface of the first wall portion 211 facing the third wall portion 213.
When the first edge 2111 protrudes out of the inner surface of the first wall 211, the contact area between the second portion 22 and the first wall 211 can be increased, and the first edge 2111 is prevented from protruding out of the outer surface of the housing, so that the contour of the housing formed by enclosing the first portion 21 and the second portion 22 is regular, and the plurality of battery cells 20 can be stacked to form the battery 100 set.
According to some embodiments of the present application, please refer to fig. 12-15, the third wall portion 213 is provided with a third edge 2131, the third edge 2131 extends along an edge of the third wall portion 213, and the third edge 2131 is used for connecting the second portion 22.
The third edge portion 2131 may be a flange provided along an edge of the third wall portion 213, and the flange may extend in a direction from the third wall portion 213 back to the first wall portion 211 in the first direction.
The third edge 2131 may be formed by thickening the edge of the third wall 213 in the first direction.
The third edge portion 2131 may be one or more, for example, in an embodiment where the third edge portion 2131 is a flange, the third edge portion 2131 may be a continuous flange, or may be a plurality of flange edges disposed along the edge of the third wall portion 213. For another example, in the embodiment in which the third edge portion 2131 is formed by thickening the edge of the third wall portion 213, the edge of the third wall portion 213 may be entirely thickened or only the edge of the segment-thickened portion may be thickened in the case of thickening.
The third edge 2131 can increase the connection strength of the first portion 21 and the second portion 22, taking an embodiment in which the second portion 22 includes a fourth wall 221, a fifth wall 222, and a sixth wall 223 connected in sequence as an example, when the second portion 22 is connected to the first portion 21, the fourth wall 221, the fifth wall 222, and the sixth wall 223 can cover the edge of the third wall 213, and the third edge 2131 increases the contact area of the third wall 213, the fourth wall 221, the fifth wall 222, and the sixth wall 223, thereby increasing the connection strength of the first portion 21 and the second portion 22.
According to some embodiments of the present disclosure, referring to fig. 13, the third edge 2131 protrudes out of the outer surface of the third wall 213.
The outer surface of the third wall portion 213 refers to a surface of the third wall portion 213 facing away from the first wall portion 211.
When the third edge portion 2131 protrudes out of the outer surface of the first wall portion 211, the joint of the first portion 21 and the second portion 22 is located outside the cavity formed by the first portion 21, so that the occupation of the internal space of the first portion 21 is reduced, the electrode assembly 27 with a larger size can be accommodated in the first portion 21, and the energy density of the battery cell 20 is improved. Furthermore, when first portion 21 and second portion 22 are joined using a joining method that generates high temperatures (e.g., welding), electrode assembly 27 is kept away from the heat source, reducing the risk of damage to electrode assembly 27 from the high temperatures experienced.
According to other embodiments of the present application, referring to fig. 15, the third edge portion 2131 protrudes from the inner surface of the third wall portion 213.
The inner surface of the third wall portion 213 refers to a surface of the third wall portion 213 facing the first wall portion 211.
When the third edge 2131 protrudes out of the inner surface of the third wall 213, the contact area between the second portion 22 and the third wall 213 can be increased, and the third edge 2131 is prevented from protruding out of the outer surface of the housing, so that the contour of the housing formed by the first portion 21 and the second portion 22 is regular, and the plurality of battery cells 20 can be stacked to form the battery 100 set.
Further, the first edge portion 2111 protrudes from the inner surface of the first wall portion 211, and in this embodiment, the first edge portion 2111 and the third edge portion 2131 can also play a role in positioning. Taking the embodiment in which the second portion 22 includes the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 connected in sequence as an example, when the first portion 21 and the second portion 22 are connected, the first edge portion 2111 and the third edge portion 2131 may respectively abut against the outer surfaces of the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223, so as to perform a function of positioning the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 in a matching manner.
Referring to fig. 16 and 17, fig. 16 is a schematic view of a second edge portion 2121 provided in some embodiments of the present application, and fig. 17 is a schematic view of a second edge portion 2121 provided in other embodiments of the present application, in which the first wall portion 211 and the third wall portion 213 are disposed opposite to each other along a first direction, and the second wall portion 212 has two opposite first edges along a second direction, and the second direction is perpendicular to the first direction. At least one of the first edges is provided with a second edge portion 2121, the second edge portion 2121 being for connection to the second portion 22.
As shown, the two first edges refer to two edges of the second wall portion 212 in the X-axis direction, and two edges of the second wall portion 212 in the Y-axis direction are occupied by the first wall portion 211 and the third wall portion 213, and do not need to be engaged with the second portion 22.
The second edge portion 2121 may be disposed on only one of the first edges, or may be disposed on both of the first edges.
The second edge portion 2121 may be connected to the first edge portion 2111 and the third edge portion 2131, and the first edge portion 2111, the second edge portion 2121, and the third edge portion 2131 may be integrally formed, taking as an example an embodiment in which the first portion 21 is integrally formed.
The second edge portion 2121 may increase the connection strength of the first portion 21 and the second portion 22, taking an embodiment that the second portion 22 includes the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 connected in sequence as an example, when the second portion 22 is connected to the first portion 21, the fourth wall portion 221 and the sixth wall portion 223 may cover both edges of the second wall portion 212 in the X-axis direction, and the second edge portion 2121 increases the contact area of the second wall portion 212 and the fourth wall portion 221 and the sixth wall portion 223, thereby increasing the connection strength of the first portion 21 and the second portion 22.
According to some embodiments of the present application, referring to fig. 16, the second edge portion 2121 protrudes from the outer surface of the second wall portion 212.
The outer surface of the second wall portion 212 refers to the surface of the second wall portion 212 facing away from the opening, and in embodiments where the first portion 21 comprises the first opening 214, the second opening 215 and the third opening 216, the outer surface of the second wall portion 212 refers to the surface of the second wall portion 212 facing away from the second opening 215.
When the second edge portion 2121 protrudes from the outer surface of the second wall portion 212, the joint of the first portion 21 and the second portion 22 is located outside the cavity formed by the first portion 21, so that the occupation of the inner space of the first portion 21 is reduced, the electrode assembly 27 with a larger size can be accommodated in the first portion 21, and the energy density of the battery cell 20 is improved. Furthermore, when first portion 21 and second portion 22 are joined by a joining process (e.g., welding) that generates high temperatures, electrode assembly 27 is kept away from the heat source, reducing the risk of damage to electrode assembly 27 due to the high temperatures experienced.
According to some embodiments of the present application, referring to fig. 17, the second edge portion 2121 protrudes from the inner surface of the second wall portion 212.
The inner surface of the second wall portion 212 refers to the surface of the second wall portion 212 facing away from the opening, and in embodiments where the first portion 21 comprises the first opening 214, the second opening 215 and the third opening 216, the inner surface of the second wall portion 212 refers to the surface of the second wall portion 212 facing the second opening 215.
When the second edge portion 2121 protrudes from the inner surface of the second wall portion 212, the contact area between the second portion 22 and the first wall portion 211 can be increased, and the second edge portion 2121 is prevented from protruding from the outer surface of the housing, so that the contour of the housing formed by enclosing the first portion 21 and the second portion 22 is regular, and the plurality of battery cells 20 can be stacked to form the battery 100 set.
According to some embodiments of the present application, the first portion 21 and the second portion 22 may be made of steel or aluminum alloy.
According to some embodiments of the present application, the first portion 21 and the second portion 22 may be bonded or welded.
According to some embodiments of the application, the housing is a cuboid.
On one hand, the rectangular housing facilitates the arrangement and lamination of a plurality of battery cells 20, for example, in the battery 100, the plurality of battery cells 20 are accommodated in the box 10, and the plurality of battery cells 20 are laminated, thereby improving the space utilization rate. And on the other hand, the cuboid shell has a simple structure and is convenient to process and manufacture.
According to some embodiments of the present application, embodiments of the present application also provide a battery cell 20 including the case and the electrode assembly 27 of the above embodiments. An electrode assembly 27 is housed in the case.
According to some embodiments of the present disclosure, referring to fig. 18, fig. 18 is a schematic structural view of an electrode terminal 25 according to some embodiments of the present disclosure, where the first portion 21 or the second portion 22 has a mounting portion, and the mounting portion is provided with a lead hole, and the lead hole penetrates through the mounting portion along a thickness direction of the mounting portion. The battery cell 20 further includes an electrode terminal 25, the electrode terminal 25 is electrically connected to the electrode assembly 27, the electrode terminal 25 includes a terminal body 252, a first limiting portion 253 and a second limiting portion 251, the terminal body 252 is inserted into the lead-out hole, the first limiting portion 253 and the second limiting portion are respectively connected to two ends of the terminal body 252 along the thickness direction of the mounting portion, and the first limiting portion 253 and the second limiting portion 251 are respectively located at two sides of the mounting portion to fix the terminal body 252.
The mounting portion may be a local area of a wall of the first and second portions 21, 22, for example, in an embodiment where the first portion 21 comprises a first wall portion 211, a second wall portion 212 and a third wall portion 213, and in an embodiment where the second portion 22 comprises a fourth wall portion 221, a fifth wall portion 222 and a sixth wall portion 223, the mounting portion may be provided in any of the aforementioned six wall portions.
The first stopper portion 253 and the second stopper portion 251 may be formed by caulking the terminal body 252 to a mounting portion, that is, applying an acting force in an axial direction of the terminal body 252 to both ends of the terminal body 252 so that both ends of the terminal body 252 are formed by expanding in a radial direction of the terminal body 252, and the mounting portion is partially interposed between the first stopper portion 253 and the second stopper portion 251 so that the terminal body 252 may be fixed to the mounting portion.
The first position-limiting portion 253 and the second position-limiting portion 251 may also be separate components, for example, the peripheral wall of the terminal body 252 may be provided with threads, and the first position-limiting portion 253 and the second position-limiting portion 251 may be provided with screw holes, and the terminal body 252 is fitted with the screw holes, so that the first position-limiting portion 253 and the second position-limiting portion 251 may be in threaded connection with the terminal body 252.
The terminal body 252 is used for leading the electric energy of the electrode assembly 27 out of the housing, the terminal body 252 is fixed on the mounting part under the action of the first limiting part 253 and the second limiting part 251, the terminal body 252 and the mounting part do not need to be welded, and the risk that the frame body structure is damaged due to the fact that the frame body is welded through during welding is avoided.
According to some embodiments of the present application, referring to fig. 18, the battery cell 20 further includes a current collecting member 26, and the current collecting member 26 connects the electrode terminal 25 and the electrode assembly 27. The current collecting member 26 is provided with a second lead-out hole, the terminal body 252 is inserted into the second lead-out hole, the first limiting portion 253 is located in the housing along the thickness direction of the mounting portion, and at least part of the current collecting member 26 is located between the first limiting portion 253 and the mounting portion.
The current collecting member 26 serves to electrically connect the electrode terminal 25 and the electrode assembly 27, and the current collecting member 26 may be a metal conductive member, such as a metal wire or a metal conductive sheet.
The current collecting member 26 is partially disposed between the first limiting portion 253 and the mounting portion, and the first limiting portion 253 can connect the current collecting member 26 to the terminal body 252 and can also electrically connect the terminal body 252 and the current collecting member 26, so that the terminal body 252 and the current collecting member 26 do not need to be welded, and the risk that the frame structure is damaged due to the fact that a frame body is welded through during welding is avoided. Moreover, welding is not needed, so that the assembly process is simplified, and the production efficiency is improved.
According to some embodiments of the present application, referring to fig. 18, the battery cell 20 further includes a first insulating member 23, and the first insulating member 23 is at least partially located between the current collecting member 26 and the mounting part in a thickness direction of the mounting part to insulate and separate the current collecting member 26 from the mounting part.
The first insulating member 23 may be a sheet made of plastic or rubber, the first insulating member 23 may be provided with a third drawing hole, and the terminal body 252 is sequentially inserted through the first drawing hole, the third drawing hole and the second drawing hole, so that the first insulating member 23 may be sandwiched between the mounting portion and the current collecting member 26.
The first insulating member 23 reduces the risk of short circuit between the current collecting member 26 and the mounting portion by insulating the current collecting member, and improves the safety of the battery cell 20.
According to some embodiments of the present application, referring to fig. 18, the battery cell 20 further includes a second insulating member 24, the second insulating member 24 is at least partially located between the mounting portion and a second position-limiting portion 251 along the thickness direction of the mounting portion, and the second position-limiting portion 251 is located outside the housing.
The second insulating member 24 may be a sheet made of plastic or rubber, the second insulating member 24 may be provided with a fourth lead-out hole, and the terminal body 252 is disposed through the fourth lead-out hole, so that the second insulating member 24 is partially sandwiched between the second limiting portion 251 and the mounting portion.
A counter bore may be provided on a face of the second insulator 24 facing the second restraint portion 251, and the second restraint portion 251 may be at least partially disposed within the counter bore, such that the second insulator 24 and the second restraint portion 251 may be in locating engagement.
The second insulating part 24 reduces the risk of short circuit of the second insulating part 251 and the mounting part, and improves the safety of the single battery 20.
According to some embodiments of the present application, embodiments of the present application also provide a battery 100 including the battery cell 20 in the above embodiments. The battery 100 may further include a case 10, and the battery cell 20 is disposed in the case 10.
According to some embodiments of the present application, the present application further provides an electric device, including the battery 100 in the above embodiments, where the battery 100 is configured to provide electric energy. Alternatively, the electric device may include the battery cell 20 in the above embodiments, and the battery cell 20 is used for providing electric energy.
Referring to fig. 3-6, in accordance with some embodiments of the present application, a housing is provided that includes a first portion 21 and a second portion 22. The first portion 21 includes a first wall portion 211, a second wall portion 212, and a third wall portion 213 connected in sequence, the first wall portion 211 is disposed opposite to the third wall portion 213, and the first wall portion 211, the second wall portion 212, and the third wall portion 213 are integrally molded to form a U-shaped structure. Along the edges of the first wall part 211 and the third wall part 213, the first part 21 comprises a first opening 214, a second opening 215 and a third opening 216. The second portion 22 includes a fourth wall portion 221, a fifth wall portion 222, and a sixth wall portion 223 connected in sequence, and the fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 are integrally formed to form a U-shaped structure. The fourth wall portion 221, the fifth wall portion 222, and the sixth wall portion 223 are used to close the first opening 214, the second opening 215, and the third opening 216, respectively, to collectively define a housing space for housing the electrode assembly 27.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit of the embodiments of the present application, and they should be construed as being included in the scope of the claims and description of the present application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein, but rather to cover all embodiments falling within the scope of the appended claims.
Claims (19)
1. An enclosure, comprising:
a first portion including a first wall portion, a second wall portion, and a third wall portion connected in this order, the first wall portion being disposed opposite the third wall portion, the first portion having an opening disposed along edges of the first wall portion and the third wall portion;
a second portion for closing the opening, the first portion and the second portion together defining a receiving space for receiving an electrode assembly.
2. The enclosure of claim 1, wherein the opening comprises a first opening, a second opening, and a third opening, the first wall portion and the third wall portion being disposed opposite one another in a first direction, the first opening and the third opening being disposed opposite one another in a second direction, the second opening and the second wall portion being disposed opposite one another in a third direction, the first direction, the second direction, and the third direction being perpendicular to one another;
the second portion is for closing the first opening, the second opening, and the third opening.
3. The housing of claim 2, wherein the second portion includes a fourth wall portion, a fifth wall portion, and a sixth wall portion connected in series, the fourth wall portion being disposed opposite the sixth wall portion along the second direction, the fourth wall portion, the fifth wall portion, and the sixth wall portion being configured to close the first opening, the second opening, and the third opening, respectively.
4. The enclosure of claim 3, wherein the first wall portion is spaced from the third wall portion by a distance L in the first direction 1 ；
The distance between the fourth wall part and the sixth wall part along the second direction is L 2 ；
The second wall part and the fifth wall part are spaced from each other by an interval L along the second direction 3 ；
Satisfies the following conditions: l is 1 ＜L 2 ，L 1 ＜L 3 。
5. The enclosure of claim 3, wherein the first wall portion and the second wall portion are connected by a first radiused wall, and the third wall portion and the second wall portion are connected by a second radiused wall;
the fourth wall part and the fifth wall part are connected through a third fillet wall, and the sixth wall part and the fifth wall part are connected through a fourth fillet wall;
the radius of the inner surface of the first radiused wall is less than the radius of the inner surface of the third radiused wall and the radius of the inner surface of the fourth radiused wall; the radius of the inner surface of the second radiused wall is less than the radius of the inner surface of the third radiused wall and the radius of the inner surface of the fourth radiused wall.
6. The housing of claim 5, wherein a radius of the inner surface of the first radiused wall is equal to a radius of the inner surface of the second radiused wall; and/or a radius of an inner surface of the third fillet wall is equal to a radius of an inner surface of the fourth fillet wall.
7. The housing of claim 1, wherein the first portion and/or the second portion comprises stainless steel.
8. A casing according to any one of claims 1 to 7, characterized in that the first wall part is provided with a first edge part extending along an edge of the first wall part, the first edge part being intended to connect the second part.
9. The enclosure of claim 8, wherein the first edge portion protrudes from an inner or outer surface of the first wall portion.
10. The housing of claim 8, wherein the third wall portion is provided with a third edge extending along an edge of the third wall portion, the third edge for connecting the second portion.
11. A casing according to claim 10, wherein the third edge portion projects from an inner or outer surface of the third wall portion.
12. The enclosure of claim 8, wherein the first wall portion is disposed opposite the third wall portion along the first direction, and the second wall portion has two first edges opposite along a second direction, the second direction being perpendicular to the first direction;
at least one of the first edges is provided with a second edge portion for connecting the second portion.
13. The enclosure of claim 12, wherein the second rim portion protrudes from an interior or exterior surface of the second wall portion.
14. The housing according to any one of claims 1 to 7, wherein the housing is a cuboid.
15. A battery cell, comprising:
the housing of any one of claims 1-14;
an electrode assembly housed within the case.
16. The battery cell as recited in claim 15, wherein the first portion or the second portion has a mounting portion provided with a lead-out hole penetrating the mounting portion in a thickness direction of the mounting portion;
the battery monomer still includes electrode terminals, electrode terminals with the electrode subassembly electricity is connected, electrode terminals includes terminal body, first spacing portion and the spacing portion of second, the terminal body is worn to locate in the extraction hole, follow the thickness direction of installation department, first spacing portion with the second is spacing connect respectively in the both ends of terminal body, first spacing portion with the spacing portion of second is located respectively the both sides of installation department, in order to fix the terminal body.
17. The battery cell as recited in claim 16 further comprising a current collecting member connecting the electrode terminal and the electrode assembly;
the current collecting component is provided with a second leading-out hole, the terminal body penetrates through the second leading-out hole, the first limiting portion is located in the shell along the thickness direction of the mounting portion, and at least part of the current collecting component is located between the first limiting portion and the mounting portion.
18. A battery comprising a cell according to any one of claims 15 to 17.
19. An electrical device comprising the battery of claim 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222736158.8U CN218867237U (en) | 2022-10-17 | 2022-10-17 | Shell, battery monomer, battery and consumer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222736158.8U CN218867237U (en) | 2022-10-17 | 2022-10-17 | Shell, battery monomer, battery and consumer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218867237U true CN218867237U (en) | 2023-04-14 |
Family
ID=87368625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222736158.8U Active CN218867237U (en) | 2022-10-17 | 2022-10-17 | Shell, battery monomer, battery and consumer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218867237U (en) |
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2022
- 2022-10-17 CN CN202222736158.8U patent/CN218867237U/en active Active
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