CN219371291U - Cover plate assembly, battery and battery device - Google Patents
Cover plate assembly, battery and battery device Download PDFInfo
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- CN219371291U CN219371291U CN202320480064.0U CN202320480064U CN219371291U CN 219371291 U CN219371291 U CN 219371291U CN 202320480064 U CN202320480064 U CN 202320480064U CN 219371291 U CN219371291 U CN 219371291U
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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 disclosure relates to the technical field of batteries, and in particular relates to a cover plate assembly, a battery and a battery device, wherein the cover plate assembly comprises: the composite pole comprises an aluminum pole body and a copper pole body, wherein the aluminum pole body comprises a first pole body and a first matching part, the first matching part is arranged on the first pole body, a welding area is arranged on one surface, far away from the first matching part, of the first pole body, the welding area is used for welding a busbar, the busbar is used for electrically connecting at least two batteries, and a projection area of the first matching part on the first pole body completely covers the welding area; the copper pole comprises a second pole body and a second matching part, the second pole body is arranged on one side of the first pole body, where the first matching part is arranged, and the second matching part is arranged on one side of the second pole body, which faces the first pole body; the first fitting portion and the second fitting portion are fitted. The overcurrent capacity of the battery can be improved.
Description
Technical Field
The disclosure relates to the technical field of batteries, and in particular relates to a cover plate assembly, a battery and a battery device.
Background
Battery devices are often provided in electric vehicles for storing electrical energy and powering the electric vehicles. Battery devices typically include a plurality of batteries, each of which is provided with a pole assembly that is connected to a bus bar to transmit electric power, and current transmission capability of the battery is poor.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to provide a cover plate assembly, a battery and a battery device, and further to improve the overcurrent capability of the battery at least to some extent.
According to a first aspect of the present disclosure, there is provided a cover plate assembly comprising:
the composite pole comprises an aluminum pole body and a copper pole body, the aluminum pole body comprises a first pole body and a first matching part, the first matching part is arranged on the first pole body, a welding area is arranged on one surface, far away from the first matching part, of the first pole body, the welding area is used for welding a busbar, the busbar is used for electrically connecting at least two batteries, and a projection area of the first matching part on the first pole body completely covers the welding area; the copper pole comprises a second pole body and a second matching part, the second pole body is arranged on one side of the first pole body, where the first matching part is arranged, and the second matching part is arranged on one side of the second pole body, which faces the first pole body;
the first matching part is matched with the second matching part, the first matching part is one of the protruding part and the concave part, and the second matching part is the other of the protruding part and the concave part.
According to a second aspect of the present disclosure, there is provided a battery comprising the above-described cap plate assembly.
According to a third aspect of the present disclosure, there is provided a battery device including the battery described above.
The embodiment of the disclosure provides a cover plate assembly, including compound utmost point post, compound utmost point post includes aluminium utmost point post and copper utmost point post, cooperate through the first cooperation portion of aluminium utmost point post and the second cooperation portion of copper utmost point post, wherein first cooperation portion and second cooperation portion are one of bellying and depressed part, the second cooperation portion is another in bellying and the depressed part, and the welded zone of busbar and utmost point post is located the projection district of the first cooperation portion of aluminium utmost point post on first utmost point post, area of contact between aluminium utmost point post and the copper utmost point post has been increased, and then the overcurrent capacity of compound utmost point post has been improved, the overcurrent performance of battery has been improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
Fig. 1 is a schematic structural view of a cover plate assembly according to an exemplary embodiment of the present disclosure.
Fig. 2 is a partial cross-sectional view of a cover plate assembly provided in an exemplary embodiment of the present disclosure.
Fig. 3 is a schematic structural body of a composite pole provided in an exemplary embodiment of the present disclosure.
Fig. 4 is a schematic structural view of another composite post provided in an exemplary embodiment of the present disclosure.
Fig. 5 is a schematic structural view of a battery according to an exemplary embodiment of the present disclosure.
Detailed Description
The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.
In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.
Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.
Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.
The exemplary embodiments of the present disclosure provide a cover plate assembly 10, as shown in fig. 1 and 2, the cover plate assembly 10 including: a composite pole 100; the composite electrode post 100 comprises an aluminum electrode post 110 and a copper electrode post 120, wherein the aluminum electrode post 110 comprises a first electrode post 111 and a first matching part 112, the first matching part 112 is arranged on the first electrode post 111, a welding area is arranged on one surface of the first electrode post 111, which is far away from the first matching part 112, and is used for welding a bus bar which is used for electrically connecting at least two batteries, and a projection area of the first matching part 112 on the first electrode post 111 completely covers the welding area; the copper pole 120 comprises a second pole body 121 and a second matching part 122, the second pole body 121 is arranged on one side of the first pole body 111 where the first matching part 112 is arranged, and the second matching part 122 is arranged on one side of the second pole body 121 facing the first pole body 111; wherein, the first mating portion 112 and the second mating portion 122 mate, the first mating portion 112 is one of a protruding portion and a recessed portion, and the second mating portion 122 is the other of the protruding portion and the recessed portion.
The cover plate assembly 10 provided by the embodiment of the disclosure includes a composite pole 100, the composite pole 100 includes an aluminum pole 110 and a copper pole 120, and the first mating portion 112 of the aluminum pole 110 and the second mating portion 122 of the copper pole 120 are mated, wherein the first mating portion 112 and the second mating portion 122 are one of a protruding portion and a recessed portion, the second mating portion 122 is the other of the protruding portion and the recessed portion, and a welding area of a bus bar and the pole is located in a projection area of the first mating portion 112 of the aluminum pole 110 on the first pole 111, so that an effective contact area between the aluminum pole 110 and the copper pole 120 is reduced after the bus bar and the composite pole 100 are welded, and the current transmission capability of the composite pole 100 is reduced, and the current passing capability of the composite pole 100 is improved.
The following will describe in detail the parts of the cover plate assembly provided in the embodiments of the present disclosure:
the composite post 100 provided by the embodiments of the present disclosure may be applied in a battery. As shown in fig. 5, the battery 20 may include a housing 21, a battery core and a pole, where the battery is provided with the battery core, the housing 21 has a receiving cavity, the battery core is disposed in the receiving cavity, and the shape of the housing 21 may be selected according to the structure and shape of the battery core, for example, the battery core is a winding type battery core, its outer peripheral shape is a cylindrical shape, the housing 21 may be a cylindrical shape matched with the shape of the battery core, or the battery core is a laminated type battery core, its outer peripheral shape is a cube, and the housing 21 may be a cube matched with the shape of the laminated type battery core. The material of the housing 21 is a metal material, and for example, the material of the housing 21 may be aluminum, copper, steel, silver, or the like.
An opening is provided on at least one end of the battery case 21, the cover plate assembly 10 covers the opening of the case 21, and a pole is provided on one end of the battery cell corresponding to the opening end of the case 21, the pole is at least partially located in the accommodating cavity of the case 21, and the current in the battery cell is transmitted to the outside of the battery case 21 through the pole. To ensure that sufficient power is supplied to the outside, the plurality of cells 20 are typically supplied with current in series, parallel, or a combination of series and parallel, and the plurality of cells 20 electrically connect the poles of the respective cells 20 through a bus bar assembly to form a battery pack. The busbar assembly includes a busbar body for electrically connecting a plurality of cells in the battery pack, and a busbar output terminal provided at an end of the busbar body, which may be a positive output terminal or a negative output terminal of the plurality of cells connected in series.
The one side of the post of every battery 20 towards the busbar main body is provided with the welded zone, is provided with the post welded zone on the one side of busbar main body towards the post, welds through welded zone and post welded zone, realizes the electric connection between battery 20 and the busbar.
The battery post provided by the embodiment of the disclosure is a composite post 100, the composite post 100 includes an aluminum post 110 and a copper post 120, the aluminum post 110 is one end of the composite post 100 electrically connected with a busbar assembly, and the copper post 120 is one end far away from the busbar assembly and electrically connected with a battery cell.
The aluminum pole 110 includes a first pole body 111 and a first mating portion 112, the first mating portion 112 is disposed on the first pole body 111, a welding area and an edge area are disposed on a surface of the first pole body 111 away from the first mating portion 112, and the edge area is adjacent to the welding area. Because the aluminum pole 110 is made of aluminum, and the same aluminum material is adopted as the busbar assembly, when the busbar assembly and the welding area are welded and connected to form a welding part, the same material can form a welding part with good welding performance during welding, so that the contact area between the aluminum pole 110 and the busbar assembly, which is caused by welding deformation or welding defects, is prevented from being reduced, the overcurrent capacity of the pole is reduced, and the production cost of the pole can be reduced due to the arrangement of the aluminum pole 110.
The first pole body 111 is provided with a weight-reducing groove, the weight-reducing groove is arranged on one side of the first pole body 111, which is close to the second pole body 121, and penetrates through the side face of the first pole body 111, the side face of the first pole body 111 is a face between the top face and the bottom face of the first pole body 111, the top face of the first pole body 111 is a face, away from the second pole body 121, of the first pole body 111, and the bottom face of the first pole body 111 is a face, close to the second pole body 121, of the first pole body 111. The weight-reducing groove is disposed on the bottom surface of the first pole body 111 and is configured to be a groove-shaped structure formed toward the top surface of the first pole body 111, and specifically, the weight-reducing groove may be a groove-shaped structure formed on the bottom surface of the first pole body 111 and penetrating through the side surface of the first pole body 111, and a step shape or a step-like shape is formed at the edge position of the first pole body 111.
Illustratively, the weight-reducing groove is formed on the bottom surface of the first pole body 111 and penetrates through the side surface of the first pole body 111 to the side surface of the first mating portion 112. Or the weight-reducing groove is formed at the bottom surface of the first pole body 111 and penetrates through the side surface of the first pole body 111, and a part of the first pole body 111 exists between the weight-reducing groove and the side surface of the first mating part 112. The weight-reducing groove may be formed on the first pole body 111 by punching or the like.
The copper pole 120 includes a second pole body 121 and a second mating portion 122, the second mating portion 122 is disposed on the second pole body 121, the second pole body 121 is disposed on a side of the first pole body 111 where the first mating portion 112 is disposed, and the second mating portion 122 is disposed on a side of the second pole body 121 facing the first pole body 111. The first pole body 111 is disposed between the busbar assembly and the second pole body 121, the first pole body 111 is matched with the busbar assembly, and the second pole body 121 is matched with the first pole body 111. The second pole body 121 and the first pole body 111 are engaged with each other by engagement between the second engaging portion 122 and the first engaging portion 112, the first engaging portion 112 is one of a convex portion and a concave portion, the second engaging portion 122 is the other of the convex portion and the concave portion, and the protruding dimension of the convex portion is engaged with the concave dimension of the concave portion, so that the two are in a close engagement relationship. For example, the first mating portion 112 is a protruding portion, and the second mating portion 122 is a recessed portion. Or the first mating portion 112 is a concave portion and the second mating portion 122 is a convex portion. The copper pole 120 can be made of copper material, and due to the fact that the overcurrent capacity of copper is high, the overcurrent capacity of the composite pole 100 can be improved through the arrangement of the copper pole 120, the copper pole 120 is connected with a battery cell, the corrosion resistance of the copper pole 120 is high, and the durability of the composite pole 100 can be improved.
The thickness of the second post 121 in the first area is greater than that of the second post 121 in the second area, the first area is a projection area of the welding area on the second post 121, and the second area is a projection area of the edge area on the second post 121. Since the second mating portion 122 is disposed on the second post 121 located in the first area, in order to avoid the second mating portion 122 from being deformed or damaged greatly when the second mating portion 122 is mated with the first mating portion 112, the second mating portion 122 needs to have sufficient strength, and therefore, the second post 121 needs to have a certain thickness in the first area, that is, the thickness of the second post 121 in the first area is greater than the thickness of the second post 121 in the second area.
In order to reduce the weight of the pole, a thinning structure is provided on the second pole body 121, and the orthographic projection of the thinning structure on the first pole body 111 is located in the edge region. The thinning structure is a groove formed in one surface of the second pole body 121 far from the first pole body 111, the groove penetrates through the side surface of the second pole body 121, the side surface of the second pole body 121 is a surface between the top surface and the bottom surface of the second pole body 121, the top surface of the second pole body 121 is one surface of the second pole body 121 close to the first pole body 111, and the bottom surface of the second pole body 121 is one surface of the second pole body 121 far away from the first pole body 111. For example, the weight-reducing structure may be a U-shaped groove or a U-shaped groove, and the groove is opened toward the side of the first pole body 111. Or the weight-reducing structure may be a V-shaped groove, and the groove is opened toward the side of the first pole body 111. For convenience in assembly of the subsequent cover plate 200 assembly and better weight reduction effect, preferably, the weight reduction structure may be a U-shaped groove. The side of the weight-reducing structure of the second pole body 121, the side of the weight-reducing groove of the first pole body 111 may be stepped.
The thicknesses of the second pole bodies 121 located at both sides of the weight-reducing structure may be equal or different, for example, the thicknesses of the first pole bodies 111 located at both sides of the weight-reducing structure may be equal, so that the weight-reducing structure is symmetrically disposed. Or the thickness of the first pole body 111 on the upper side of the weight-reducing structure is greater than that of the first pole body 111 on the lower side of the weight-reducing structure. Or the thickness of the first pole body 111 on the upper side of the weight-reducing structure is smaller than that of the first pole body 111 on the lower side of the weight-reducing structure. The weight-reducing structure may be formed on the second pole body 121 by punching or the like.
Further, the cover plate 200 assembly further includes a cover plate 200, wherein the cover plate 200 is disposed between the housing 21 and the pole, and the cover plate 200 is used for covering the opening of the housing 21. The cover plate 200 is provided with a through hole, and the composite pole 100 is arranged in the through hole in a penetrating manner. The cover plate 200 assembly further includes an insulator 300, the insulator 300 being disposed at least between the composite post 100 and the cover plate 200.
The insulator 300 includes a first insulating portion 310 and a second insulating portion 320, the first insulating portion 310 is disposed between the cap plate 200 and the second pole body 121, one end of the second insulating portion 320 is connected to the second insulating portion 320, and the other end of the second insulating portion 320 extends to a side surface of the first pole body 111. The insulating member 300 can separate the first pole body 111 from the cover plate 200, and the second pole body 121 from the cover plate 200, so that the cover plate 200 is insulated from the composite pole body 100, and overcurrent between the cover plate 200 and the composite pole body 100 is avoided.
For example, the insulating member 300 may be in an L-shape or an L-like shape or a combination of L-shapes, the first insulating portion 310 is an end of the insulating member 300 parallel to the cover plate 200, the second insulating portion 320 is an end of the insulating member 300 perpendicular to the cover plate 200, the first insulating portion 310 is between the cover plate 200 and the second pole body 121, on one hand, insulates the second pole body 121 from the cover plate 200, and on the other hand, provides a force perpendicular to the cover plate 200 for the second pole body 121 to avoid the second pole body 121 from separating from the first pole body 111, and the second insulating portion 320 extends to a side surface of the first pole body 111 and covers the side surface of the first pole body 111 to insulate the first pole body 111 from the cover plate 200. Or the insulator 300 may be adaptively adjusted according to the shape of the weight-reducing groove on the aluminum pole 110 and the weight-reducing structure on the copper pole 120 so that the insulator 300 is adapted to the outer shape of the composite pole 100.
A lower insulator may be further provided between the cover plate 200 and the case 21, and the lower insulator may be provided between the top surface of the case 21 and the bottom surface of the cover plate 200 and may extend toward the inside of the weight-reduction structure of the second pole body 121. For example, the side surface of the cover body extends toward the inside of the weight-reducing structure, so as to avoid electrical conduction between the cover body and the second pole 121, the lower insulating member may extend toward the inside of the weight-reducing structure, and the extending length covers at least the extending length of the cover plate 200 in the inside of the weight-reducing structure, so as to ensure the insulation of the lower insulating member to the cover plate 200 and the second pole 121. Or the side surface of the cover plate 200 is flush with the opening of the weight-reducing structure, and the side surface of the lower insulating member may be flush with the opening of the weight-reducing structure.
The material of the insulating member 300 and the lower insulating member may be one or more of polyethylene terephthalate (PET), polyethylene terephthalate-polyethylene glycol (PETG), thermoplastic Polyurethane (TPU), polycarbonate (PC), polypropylene (PP), and the like.
The cover plate assembly 10 may further include a sealing member 400, the sealing member 400 is sleeved on the second pole body 121, and the sealing member 400 is located inside the weight-reducing structure, the sealing member 400 is used for filling a gap between the insulating member 300, the cover plate 200 and the lower insulating member 300 in the weight-reducing structure, which are disposed on the second pole body 121, so that the insulating member 300, the lower insulating member and the cover plate 200 are prevented from being displaced greatly, and impurities are prevented from entering the gap. For example, the seal 400 may be an L-shaped member, with a first face of the seal 400 attached to a side of the weight-reducing structure and a second face of the seal 400 attached to a top face of the weight-reducing structure, the first face being perpendicular to the second face. The gap exists between the sealing member 400 and the insulating member 300, and the lower insulating member, so that enough space is provided for the insulating member 300 or the lower insulating member to be deformed by extrusion.
Further, for the symmetry of the structure of the cover assembly 10 and the convenience of assembly, the first pole body 111 may be disposed in a symmetrical structure, the first matching portion 112 may be disposed in a central position of the symmetry of the first pole body 111, the second pole body 121 may be disposed in a symmetrical structure, and the second matching portion 122 may be disposed in a central position of the symmetry of the second pole body 121. The weight-reducing grooves on the first pole body 111 may be formed in a central symmetry manner, and the weight-reducing structures on the second pole body 121 may be formed in a central symmetry manner, and the symmetry centers of the two are the symmetry centers of the composite pole body 100.
Wherein the aluminum pole 110 and the copper pole 120 are connected by cold stamping. For example, the aluminum pole 110 is cold-stamped to form a first pole body 111 having a first mating portion 112, the copper pole 120 is cold-stamped to form a second pole body 121 having a second mating portion 122, and the first mating portion 112 and the second mating portion 122 are mated to connect the aluminum pole 110 and the copper pole 120. Or the aluminum pole 110 and the copper pole 120 are simultaneously cold stamped to form the mated first mating portion 112 and second mating portion 122.
In a possible embodiment provided in the present disclosure, as shown in fig. 3, the first matching portion 112 of the aluminum pole 110 in the composite pole 100 is a protruding portion, the second matching portion 122 of the copper pole 120 is a recessed portion, and a portion of the protruding portion protruding from the bottom surface of the first pole 111 is matched with a portion of the recessed portion recessed from the top surface of the second pole 121.
Wherein, the projection of the weight-reducing groove on the top surface of the first pole body 111 is located in the edge area, and the projection of the weight-reducing structure on the top surface of the first pole body 111 is located in the edge area. For example, a weight-reducing structure is disposed on the copper pole 120, the weight-reducing groove on the aluminum pole 110 penetrates through the side surface of the first pole 111 and extends to the side surface of the protruding portion, the side surface of the weight-reducing structure is flush with the outer side surface of the first pole 111, the insulating member 300 may be L-shaped, one end of the insulating member 300 covers the outer side surface of the first pole 111 and the outer side surface of the second pole 121 at the same time, the other end is located between the second pole 121 and the cover plate 200, and the insulating member 300 separates the composite pole 100 from the cover plate 200.
Or the copper pole 120 is provided with a weight-reducing structure, the weight-reducing groove on the aluminum pole 110 penetrates through the side surface of the first pole body 111 and does not extend to the side surface of the protruding portion, the side surface of the weight-reducing structure is flush with the side surface of the weight-reducing groove close to the protruding portion, so that the opening of the weight-reducing groove and the opening of the weight-reducing structure form a multi-step shape, the insulating piece 300 can be two L-shaped structures connected end to end, wherein the part of the insulating piece 300 perpendicular to the cover plate 200 covers the outer side surface of the first pole body 111 and the side surface of the second pole body 121 respectively, and the part of the insulating piece 300 parallel to the cover plate 200 covers one surface of the weight-reducing groove of the first pole body 111 and one surface of the weight-reducing structure of the second pole body 121 respectively.
In another possible embodiment provided by the present disclosure, as shown in fig. 4, the first matching portion 112 of the aluminum pole 110 in the composite pole 100 is a concave portion, the second matching portion 122 of the copper pole 120 is a convex portion, and a portion of the convex portion protruding from the top surface of the second pole 121 is matched with a portion of the concave portion recessed from the bottom surface of the first pole 111.
Wherein, the projection of the weight-reducing groove on the top surface of the first pole body 111 is located in the edge area, and the projection of the weight-reducing structure on the top surface of the first pole body 111 is located in the edge area. For example, the weight-reducing groove penetrates through the side surface of the first pole and reaches the side surface of the recess, the side surface of the weight-reducing structure is flush with the side surface of the first pole 111, and the insulating member 300 disposed between the cover plate 200 and the composite pole 100 may have an L shape. Or the weight-reducing groove penetrates through the side surface of the first pole body 111 and extends to the side surface of the concave part, the side surface of the weight-reducing structure is flush with the side surface of the concave part where the weight-reducing groove is formed, and the insulating piece 300 arranged between the cover plate 200 and the composite pole body 100 can be in two L-shaped structures connected end to end.
The cover plate assembly 10 provided by the embodiment of the disclosure includes a composite pole 100, the composite pole 100 includes an aluminum pole 110 and a copper pole 120, and the first mating portion 112 of the aluminum pole 110 and the second mating portion 122 of the copper pole 120 are mated, wherein the first mating portion 112 and the second mating portion 122 are one of a protruding portion and a recessed portion, the second mating portion 122 is the other of the protruding portion and the recessed portion, and a welding area of a bus bar and the pole is located in a projection area of the first mating portion 112 of the aluminum pole 110 on the first pole 111, so that an effective contact area between the aluminum pole 110 and the copper pole 120 is reduced after the bus bar and the composite pole 100 are welded, and the current transmission capability of the composite pole 100 is reduced, and the current passing capability of the composite pole 100 is improved.
The battery provided by the embodiment of the present disclosure includes the above-described cap plate assembly 10. In one embodiment, the battery cells of the battery may be winding type battery cells, so that the battery cells are convenient to group and long in length can be obtained through processing. The battery cell is provided with a second pole piece with the first pole piece opposite to the first pole piece in electrical property and a diaphragm sheet arranged between the first pole piece and the second pole piece, and the first pole piece, the second pole piece opposite to the first pole piece in electrical property and the diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain the winding type battery cell.
In another embodiment, the cell of the battery may also be a laminated cell having a first pole piece, a second pole piece opposite the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece stacked one on top of the other such that pairs of the first pole piece and the second pole piece are stacked to form a laminated cell.
The cover plate assembly 10 provided in the embodiment of the present disclosure is applicable to both cylindrical batteries composed of wound cells and prismatic batteries composed of stacked cells, but the batteries in the embodiment of the present disclosure are not limited to cylindrical batteries or prismatic batteries, and may be summarized in practical applications as other types of batteries, etc.
The battery device provided by the embodiment of the disclosure includes the battery described above, and the battery device may be applied to an electric vehicle, and when the battery is used in the electric vehicle, the battery device may be a battery pack, and the battery pack is mounted on the electric vehicle to provide energy to the electric vehicle.
In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A cover plate assembly, the cover plate assembly comprising:
the composite pole comprises an aluminum pole body and a copper pole body, the aluminum pole body comprises a first pole body and a first matching part, the first matching part is arranged on the first pole body, a welding area is arranged on one surface, far away from the first matching part, of the first pole body, the welding area is used for welding a busbar, the busbar is used for electrically connecting at least two batteries, and a projection area of the first matching part on the first pole body completely covers the welding area; the copper pole comprises a second pole body and a second matching part, the second pole body is arranged on one side of the first pole body, where the first matching part is arranged, and the second matching part is arranged on one side of the second pole body, which faces the first pole body;
the first matching part is matched with the second matching part, the first matching part is one of the protruding part and the concave part, and the second matching part is the other of the protruding part and the concave part.
2. The cover plate assembly of claim 1 wherein said first pole body further has an edge region disposed thereon, said edge region being adjacent said weld region, a projection of said weld region onto said second pole body being a first region, a projection of said edge region onto said second pole body being a second region, a thickness of said second pole body being greater in said first region than a thickness of said second pole body in said second region.
3. The cover plate assembly of claim 2, wherein the second pole body is provided with a thinned structure, and an orthographic projection of the thinned structure on the first pole body is located at the edge region.
4. The cover plate assembly of claim 3 wherein the thinned structure is a recess in a side of the first pole body and the recess extends through a side of the second pole body.
5. The cover plate assembly of claim 1, wherein the first pole body is provided with a weight-reducing slot, the weight-reducing slot is provided on a side surface of the second pole body, and the weight-reducing slot penetrates the side surface of the first pole body.
6. The cover assembly of claim 1, further comprising:
the cover plate is provided with a through hole, and the composite pole is arranged through the through hole;
and the insulating piece is at least arranged between the composite pole and the cover plate.
7. The cover assembly of claim 6, wherein the insulator comprises:
a first insulating part arranged between the cover plate and the second pole body;
and one end of the second insulating part is connected with the first insulating part, and the other end of the second insulating part extends to the side surface of the first pole body.
8. The cover plate assembly of any one of claims 1-7, wherein the aluminum pole and the copper pole are connected by cold stamping.
9. A battery comprising the cap assembly of any one of claims 1-8.
10. A battery device, characterized in that the battery device comprises the battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320480064.0U CN219371291U (en) | 2023-03-14 | 2023-03-14 | Cover plate assembly, battery and battery device |
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| CN202320480064.0U CN219371291U (en) | 2023-03-14 | 2023-03-14 | Cover plate assembly, battery and battery device |
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| CN219371291U true CN219371291U (en) | 2023-07-18 |
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