CN116169441A - Cylindrical battery and battery pack - Google Patents
Cylindrical battery and battery pack Download PDFInfo
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- CN116169441A CN116169441A CN202310068684.8A CN202310068684A CN116169441A CN 116169441 A CN116169441 A CN 116169441A CN 202310068684 A CN202310068684 A CN 202310068684A CN 116169441 A CN116169441 A CN 116169441A
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- Prior art keywords
- cap
- cylindrical battery
- battery
- tab
- utmost point
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a cylindrical battery and a battery pack, wherein the cylindrical battery comprises: a housing; the cover cap assembly is connected and matched between the shell and the cover cap assembly, and comprises a first cover cap, a second cover cap and an insulating piece, wherein the first cover cap and the second cover cap are insulated through the insulating piece and form an integral structure; the battery cell is arranged in the shell, a first lug is arranged on the end face of the battery cell, a second lug is positioned on the same end face with the first lug, the polarities of the first lug and the second lug are opposite, the first lug is connected with the first cap, and the second lug is connected with the second cap; the first cap of effectual messenger has different polarities with the second cap respectively, need not to set up the utmost point post respectively in the upper end and the lower extreme of cylinder battery to the height of cylinder battery that reduces, and when the module equipment, the interior space utilization of effectual improvement module.
Description
Technical Field
The invention relates to the technical field of battery and battery manufacturing, in particular to a cylindrical battery and a battery pack.
Background
Lithium batteries refer to batteries that contain lithium (including metallic lithium, lithium alloys, and lithium ions, lithium polymers) in an electrochemical system. The lithium battery has the advantages of small volume, large capacity, long service life, low self-discharge rate, no memory effect, green environmental protection and the like, and is widely applied to commercial vehicles, special vehicles, electric bicycles, energy storage systems, medical appliances and the like at present.
The positive pole post, the negative pole post of current cylindrical battery set up respectively in cylindrical battery's upper end and lower extreme to increased cylindrical battery's height, and when the module was assembled, cylindrical battery's upper end and lower extreme all were provided with the utmost point post, lead to cylindrical battery's occupation space big, space utilization is end, and battery module energy density after the equipment is lower.
Disclosure of Invention
One of the objects of the present invention is: the utility model provides a cylinder battery, the positive pole of having solved the cylinder battery among the prior art, negative pole post set up respectively in the upper end and the lower extreme of cylinder battery to increased the technical problem of the height of cylinder battery, realized that first hood and second hood have different polarities respectively, cylinder battery need not to set up the utmost point post respectively with the lower extreme of cylinder battery again, thereby the height of cylinder battery that reduces.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a cylindrical battery, comprising:
a housing;
the cover cap assembly is connected and matched between the shell and the cover cap assembly, and comprises a first cover cap, a second cover cap and an insulating piece, wherein the first cover cap and the second cover cap are insulated through the insulating piece and form an integral structure;
the battery cell, the battery cell set up in the casing, the terminal surface of battery cell be provided with first utmost point ear, and with first utmost point ear is located the second utmost point ear of same terminal surface, first utmost point ear with the polarity of second utmost point ear is opposite, first utmost point ear with first block is connected, the second utmost point ear with second block is connected.
According to the improvement of the cylindrical battery, the first cap and/or the second cap are/is provided with the concave part.
According to the improvement of the cylindrical battery, the concave part is in mirror symmetry with respect to the diameter of the cap assembly.
According to the improvement of the cylindrical battery, the first cover cap and/or the second cover cap are/is integrally provided with the protruding portion, and the protruding portion is used for being connected with the outside of the cylindrical battery.
The improvement of the cylindrical battery provided by the invention, wherein the protruding part is in mirror symmetry with respect to the diameter of the cap assembly.
According to the improvement of the cylindrical battery, the lower surface of the concave part is provided with the convex part in a protruding mode for the battery cell.
According to the improvement of the cylindrical battery, the first switching piece is arranged between the first lug and the first cap, and the second switching piece is arranged between the second lug and the second cap.
According to the improvement of the cylindrical battery, the surface, connected with the insulating piece, of the first cover cap and/or the second cover cap is provided with a plurality of nano holes, and the insulating piece is partially embedded into the nano holes.
According to the improvement of the cylindrical battery, the first cap is made of aluminum, and the second cap is made of one of copper, copper nickel plating and copper aluminum composite plates.
According to the improvement of the cylindrical battery, the orthographic projection of the first cap on the end face of the battery cell is larger than that of the second cap on the battery cell.
According to the improvement of the cylindrical battery, the first cap, the insulating piece and the second cap are sequentially connected.
According to the improvement of the cylindrical battery, the first cap, the insulating piece and the second cap are sequentially connected from left to right.
According to the improvement of the cylindrical battery, the insulation resistance value of the insulation piece is larger than 2G ohm.
According to the improvement of the cylindrical battery, a sealing insulator is arranged between the shell and the cap assembly.
According to the improvement of the cylindrical battery, the sealing insulating piece and the insulating piece are integrally formed.
Another object of the invention is: there is provided a battery pack comprising a plurality of cylindrical batteries as hereinbefore described.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a cylindrical battery, which is characterized in that a first cover cap and a second cover cap are insulated through an insulating piece, the polarity of a first electrode lug is opposite to that of a second electrode lug, so that the first electrode lug and the second electrode lug can be respectively connected with the first cover cap and the second cover cap, and therefore, the first cover cap and the second cover cap respectively have different polarities.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic exploded view of the present invention.
Fig. 3 is a schematic structural diagram of the battery cell of the present invention.
Fig. 4 is a schematic structural view of a recess portion according to the present invention.
Fig. 5 is a schematic view of the structure of the boss of the present invention.
Fig. 6 is a schematic diagram of another embodiment of the present invention.
Fig. 7 is a schematic view of another embodiment of the present invention.
Fig. 8 is a schematic diagram of the structure at D in fig. 7.
Fig. 9 is a schematic top view of the present invention.
Reference numerals:
100. a housing; 110. a hemming portion; 120. a crimping part;
200. a cap assembly; 210. a first cap; 211. a recessed portion; 212. a boss; 220. second one
Capping; 230. an insulating member;
300. a battery cell; 310. a first tab; 320. a second lug;
400. sealing the insulating member;
500. an insulating barrier; 510. a first connection portion; 511. a reinforcing structure; 512. a receiving groove; 520. a second connecting portion; 521. a first bayonet; 522. a second bayonet;
600. an x direction;
700. and the y direction.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described.
In the description of the present invention, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present invention and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. Furthermore, 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.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
For a better understanding of the present invention, a cylindrical battery according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 8.
Referring to fig. 1-9, a cylindrical battery according to an embodiment of the invention includes a housing 100, a cap assembly 200, and a battery cell 300, where the cap assembly 200 is connected to and matched with the housing 100.
The cap assembly 200 of the embodiment of the present invention includes a first cap 210, a second cap 220, and an insulating member 230, and the first cap 210 and the second cap 220 are insulated by the insulating member 230 and form an integral structure. Through the cooperation of the first cap 210, the second cap 220, and the insulator 230, the insulator 230 effectively insulates the first cap 210 and the second cap 220 and forms the cap assembly 200.
Referring to fig. 1, in order to prevent the first cap 210 and the second cap 220 from being electrically connected to the housing 100 at the same time and causing short circuit of the battery, the first cap 210 and the second cap 220 need to be electrically connected to the housing 100, i.e., the cap assembly 200 is electrically connected to the housing 100; referring to fig. 7 to 9, the housing 100 is only in contact with the first cap 210, the first cap 210 is insulated from the second cap 220 by the insulating member 230, for example, the first cap 210, the insulating member 230 and the second cap 220 are arranged in concentric circles, and the housing 100 can be directly electrically connected to the first cap 210 without insulation.
The battery cell 300 of the embodiment of the invention is arranged in the housing 100, the end face of the battery cell 300 is provided with a first tab 310 and a second tab 320 positioned on the same end face as the first tab 310, the polarity of the first tab 310 is opposite to that of the second tab 320, the first tab 310 is connected with the first cap 210, and the second tab 320 is connected with the second cap 220. By the arrangement of the above structure, the first cap 210 and the second cap 220 are effectively provided with different polarities, respectively.
It should be noted that, the battery cell 300 includes a first pole piece, a second pole piece, and a diaphragm, the diaphragm is disposed between the first pole piece and the second pole piece, the first pole piece, the diaphragm, and the second pole piece can be stacked or wound to form the battery cell 300, the first tab 310 is disposed on the first pole piece, and the second tab 320 is disposed on the second pole piece. In addition, the first tab 310 may be disposed on the first pole piece in a welding manner, or the first tab 310 may be directly die-cut on the first pole piece in a die-cutting manner; the second lug 320 may be welded to the second pole piece, or the second lug 320 may be directly die-cut on the second pole piece by die-cutting.
It should be noted that at least one of the first tab 310 and the second tab 320 is provided, and when the first tab 310 or the second tab 320 is an anode, the first tab 310 or the second tab 320 is aluminum, and when the first tab 310 or the second tab 320 is a cathode, the first tab 310 or the second tab 320 is one of copper, copper-nickel-plated, and copper-aluminum composite board.
In the cylindrical battery of the embodiment of the invention, the cap assembly 200 includes a first cap 210, a second cap 220, and an insulating member 230, the first cap 210 and the second cap 220 are insulated by the insulating member 230 and form an integral structure, and the end face of the battery core 300 is provided with a first tab 310 and a second tab 320 located on the same end face as the first tab 310, the first tab 310 is connected with the first cap 210, the second tab 320 is connected with the second cap 220, and finally the cap assembly 200 is in insulating fit with the housing 100 to insulate the housing 100 from the cap assembly 200, so as to prevent the battery from being shorted. In this way, in the cylindrical battery of the embodiment of the present invention, the first cap 210 and the second cap 220 are insulated by the insulating member 230, the polarity of the first tab 310 is opposite to that of the second tab 320, so that the first tab 310 and the second tab 320 can be respectively connected with the first cap 210 and the second cap 220, and the first cap 210 and the second cap 220 have different polarities, and compared with the existing cylindrical battery, the cylindrical battery of the embodiment of the present invention does not need to be provided with polar posts at the upper end and the lower end of the cylindrical battery, so that the height of the cylindrical battery is reduced, and when the module is assembled, the internal space utilization rate of the module can be effectively improved, and the energy density of the assembled battery module is improved.
In addition, the embodiment of the invention does not need to arrange a pole on the cap assembly 200, thereby saving the height space of the battery and improving the energy density of the battery. Furthermore, the insulating fit between the cap assembly 200 and the housing 100 according to the embodiment of the present invention effectively prevents the possibility of power-on between the cap assembly 200 and the housing 100, thereby preventing the battery from being shorted.
In one embodiment, referring to fig. 4, the first cap 210 and/or the second cap 220 of the embodiment of the present invention is provided with a recess.
It should be noted that, the recess portion in the embodiment of the present invention includes the following three structural forms.
First, the first cap 210 is provided with a recess, the first cap 210 can be connected with the first tab 310 through the recess, so that the distance between the first cap 210 and the first tab 310 is effectively shortened, the connection between the first cap 210 and the first tab 310 is assisted, and meanwhile, the first cap 210 and the first tab 310 can be effectively prevented from being in cold joint;
second, the second cap 220 is provided with a recess, the second cap 220 can be connected with the second lug 320 through the recess, so that the distance between the second cap 220 and the second lug 320 is effectively shortened, the connection between the second cap 220 and the second lug 320 is assisted, and meanwhile, the cold joint between the second cap 220 and the second lug 320 can be effectively prevented;
third, the first cap 210 and the second cap 220 are both provided with a concave portion, the first cap 210 can be connected with the first tab 310 through the concave portion, the second cap 220 can be connected with the second tab 320 through the concave portion, and the distance between the first cap 210 and the first tab 310 and the distance between the second cap 220 and the second tab 320 are effectively shortened, so that the connection between the first cap 210 and the first tab 310 is assisted, the connection between the second cap 220 and the second tab 320 is also prevented, and the concave portion is also provided with the function of preventing the first tab 310 and the second tab 320 from being subjected to cold welding.
Further, the recess is mirror symmetrical about the diameter of the cap assembly 200. When the first cap 210 and the second cap 220 are both provided with the concave portions, the concave portions on the first cap 210 and the concave portions on the second cap 220 are mirror-symmetrical with respect to the diameter of the cap assembly 200, and the positions of the concave portions are effectively set.
Specifically, the lower surface of the concave portion protrudes toward the battery cell 300 with a convex portion. Through the setting of convex part, the convex part is the lower surface of depressed part to the convex part of electric core 300, carries out spacing effect to electric core 300, effectually prevents that electric core 300 from taking place the displacement in the use, simultaneously, the convex part can effectually support the tab, increases welded reliability.
In one embodiment, referring to fig. 5, the first cap 210 and/or the second cap 220 of the embodiment of the present invention are provided with protrusions. The case 100 includes the crimping part 110 formed at the lower part of the cap assembly 200 and the inwardly bent crimping part 120 formed at the upper part of the cap assembly 200, before the battery is sealed, the crimping part 110 needs to be provided on the case 100 in preparation for the battery sealing, after the battery sealing, the inwardly bent crimping part 120 of the upper part of the cap assembly 200 is formed on the case 100, since the cap assembly 200 is arranged on the case 100 through the sealing, the end face of the first cap 210 and the end face of the second cap 220 are lower than the top end face of the case 100, and the end face of the protruding part is arranged on the first cap 210 and/or the second cap 220 through the arrangement of the protruding part, so that the end face of the protruding part exceeds the top end face of the case 100, thereby assisting the connection of the first cap 210 and the second cap 220 with devices used with the battery, and further preventing the poor contact of the battery with the devices used with the battery.
It should be noted that the protruding portion of the embodiment of the present invention includes the following three structural forms.
First, the first cap 210 is provided with a protrusion;
second, the second cap 220 is provided with a protrusion;
third, the first cap 210 and the second cap 220 are each provided with a protrusion.
Further, the protrusions are mirror-symmetrical about the diameter of the cap assembly 200. When the first cap 210 and the second cap 220 are both provided with the protruding portions, the protruding portions on the first cap 210 and the protruding portions on the second cap 220 are mirror-symmetrical with respect to the diameter of the cap assembly 200, and the protruding portions are effectively located.
It should be noted that referring to fig. 6, the first cap 210 may be provided with a protruding portion and a recessed portion at the same time, and the second cap 220 may be provided with a protruding portion and a recessed portion at the same time, so that the distance between the first cap 210 and the first tab 310 and the distance between the second cap 220 and the second tab 320 may be shortened, and the end surfaces of the first protruding portion 212 and the second protruding portion may exceed the top end surface of the housing 100, thereby assisting the connection of the first cap 210 and the second cap 220 with devices used in cooperation with the battery.
It should be noted that the cross-sectional shape of the protruding portion and the cross-sectional shape of the recessed portion may be square, round, triangular, trapezoidal, etc., and may be set according to practical situations when in use, and at the same time, the size and number of the protruding portions and the size and number of the recessed portions may be set according to practical requirements.
In one embodiment, a first switching piece is disposed between the first tab 310 and the first cap 210, and a second switching piece is disposed between the second tab 320 and the second cap 220. The first tab 310 may be directly or indirectly connected to the first cap 210, the second tab 320 may be directly or indirectly connected to the second cap 220, and during indirect connection, the first tab 310 may be connected to the first cap 210 through a tab of the first tab 310, the second tab 320 may be connected to the second cap 220 through a tab of the second tab 320, and a material of the tab may be the same as or different from a material of the tab to be connected.
In one embodiment, the surface of the first cap 210 and/or the second cap 220 connected with the insulating member 230 is provided with a plurality of nanopores, the insulating member 230 is partially embedded in the nanopores, the nanopores are arranged on the first cap 210 and/or the second cap 220, the insulating member 230 is arranged between the first cap 210 and the second cap 220 in an injection molding manner, the three are connected into an integral structure, and the part of the insulating member 230 is embedded in the nanopores, so that the bonding force between the first cap 210, the second cap 220 and the insulating member 230 is improved, and the good air tightness of the joints between the first cap 210, the second cap 220 and the insulating member 230 is ensured.
The pore diameter and depth of the nanopore are described. And the distance between two adjacent holes can be adjusted according to actual requirements.
It should be noted that the first cap 210 and/or the second cap 220 may be formed with a plurality of nanopores by laser engraving or chemical etching. In addition, compared with the common chemical corrosion treatment, the laser engraving pore-forming rate is high, the efficiency is high, the method is more environment-friendly, and the needed shape, pore diameter, pore distribution density and the like of the nano pores can be obtained by adjusting engraving parameters. Furthermore, the insulating member 230 is one of PP or PE.
In one embodiment, the first cap 210 is aluminum, and the second cap 220 is one of copper, copper nickel plating, and copper aluminum composite plate. Through the setting that first block 210 is aluminium, second block 220 is the setting of one of copper, copper nickel plating, copper aluminum composite sheet, and the effectual material to first block 210, the material of second block 220 set up, in the use, can select according to actual demand.
Further, the front projection of the first cap 210 on the end face of the battery cell 300 is larger than the front projection of the second cap 220 on the battery cell 300. The first cap 210 is made of aluminum, the second cap 220 is made of copper, and the overcurrent capacity of aluminum is smaller than that of copper, so that the area of the upper surface of the first cap 210 needs to be larger than that of the upper surface of the second cap 220 in order to make the overcurrent capacities of the first cap 210 and the second cap 220 identical.
In one embodiment, the first cap 210, the insulator 230, and the second cap 220 of the embodiment of the present invention are sequentially connected. Through first block 210, insulating part 230, second block 220 connect gradually, and insulating part 230 sets up between first block 210 and second block 220, and effectual first block 210 and second block 220 are insulated, prevent that first block 210 and second block 220 from because the mistake touches and lead to the short circuit.
Further, the first cap, the insulating member and the second cap are sequentially connected from left to right.
In one embodiment, the insulation resistance value of the insulation member 230 of the embodiment of the invention is 2G ohm, which effectively insulates the first cap 210 and the second cap 220, and assists the first cap 210 and the second cap 220 to have different polarities, and meanwhile, the process that the top cap of the existing battery needs to process a pole is omitted, so that the cost is saved.
Insulation resistance is the most basic insulation index of electrical equipment and electrical lines. For the handover test of the low voltage electric device, the insulation resistance of the motor, the distribution equipment and the distribution line should not be lower than 0.5mΩ at normal temperature (for the equipment and the line in operation, the insulation resistance should not be lower than 1mΩ/kV). The insulation resistance of the piezoelectric device and its connection cable and secondary circuit should generally not be lower than 1mΩ; should not be below 0.5mΩ in a relatively humid environment; the insulation resistance of the secondary circuit busbar should not be lower than 10mΩ. The insulation resistance of the class I hand-held power tool should not be lower than 2mΩ.1gΩ=1000 mΩ, ohms: omega or ohm is the resistance value.
In one embodiment, a seal insulator 400 is provided between the housing 100 and the cap assembly 200 of an embodiment of the present invention. Through the setting of seal insulator 400, effectually insulate between casing 100 and the block subassembly 200, strengthen the sealed effect between casing 100 and the block subassembly 200 simultaneously, prevent that the phenomenon of gas leakage from appearing in the battery.
Further, the seal insulator 400 is integrally formed with the insulator 230. When the sealing insulator 400 and the insulator 230 are integrally formed, a space for installing the first cap 210 and the second cap 220 needs to be reserved between the sealing insulator 400 and the insulator 230, so that the connection between the first tab 310 and the first cap 210 and the connection between the second tab 320 and the second cap 220 are ensured.
It should be noted that, the surface of the housing 100, the cap assembly 200, and the sealing insulator 400 may be sealed by a nanocrystallization method, or the sealing insulator 400 may be bonded between the housing 100 and the cap assembly 200, and in addition, after nanocrystallization, the bonding strength between the housing 100, the cap assembly 200, and the sealing insulator 400 may be effectively improved, so as to further improve the air tightness between the housing 100 and the cap assembly 200.
It should be noted that, the explosion-proof valve of this application sets up in the bottom of casing 100, and accessible laser etching, or laser welding's mode forms explosion-proof valve in the bottom of casing 100, and laser etching's pattern can set up to convex, triangle-shaped, square, trapezoidal, oval, wavy line etc. when using, can select according to actual demand.
The battery pack of the embodiment of the invention comprises a plurality of cylindrical batteries of any of the embodiments. The first cap 210, the second cap 220 and the insulating member 230 of the battery have strong binding force, and the connection part of the first cap 210, the second cap 220 and the insulating member 230 has good air tightness, so that the air tightness effect of the battery is ensured, and meanwhile, the cap assembly 200 is not required to be processed with a pole, so that the cost is saved, the air tightness effect of the battery module is improved, and the cost is reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (16)
1. A cylindrical battery, comprising:
a housing;
the cover cap assembly is connected and matched between the shell and the cover cap assembly, and comprises a first cover cap, a second cover cap and an insulating piece, wherein the first cover cap and the second cover cap are insulated through the insulating piece and form an integral structure;
the battery cell, the battery cell set up in the casing, the terminal surface of battery cell be provided with first utmost point ear, and with first utmost point ear is located the second utmost point ear of same terminal surface, first utmost point ear with the polarity of second utmost point ear is opposite, first utmost point ear with first block is connected, the second utmost point ear with second block is connected.
2. A cylindrical battery as claimed in claim 1, wherein the first cap and/or the second cap is provided with a recess.
3. The cylindrical battery of claim 2, wherein said recess is mirror symmetrical about the diameter of said cap assembly.
4. The cylindrical battery according to claim 1, wherein the first cap and/or the second cap is integrally provided with a protruding portion for connection with the outside of the cylindrical battery.
5. The cylindrical battery of claim 4, wherein said boss is mirror symmetrical about the diameter of said cap assembly.
6. A cylindrical battery according to claim 2, wherein the lower surface of said concave portion is protruded toward said cell.
7. The cylindrical battery of claim 1, wherein a first tab is disposed between the first tab and the first cap, and a second tab is disposed between the second tab and the second cap.
8. The cylindrical battery according to claim 1, wherein the surface of the first cap and/or the second cap, which is connected to the insulating member, is provided with a plurality of nanopores, and the insulating member is partially embedded in the nanopores.
9. The cylindrical battery of claim 1, wherein the first cap is aluminum and the second cap is one of copper, copper nickel plated, copper aluminum composite.
10. The cylindrical battery of claim 9, wherein the orthographic projection of said first cap on said cell end face is greater than the orthographic projection of said second cap on said cell.
11. The cylindrical battery according to claim 1, wherein the first cap, the insulating member, and the second cap are connected in this order.
12. The cylindrical battery of claim 11, wherein said first cap, said insulator and said second cap are connected in sequence from left to right.
13. The cylindrical battery of claim 1, wherein said insulator has an insulation resistance value greater than 2G ohm.
14. A cylindrical battery as in claim 1, wherein a seal insulator is disposed between said housing and said cap assembly.
15. A cylindrical battery according to claim 14, wherein said seal insulator is integrally formed with said insulator.
16. A battery pack comprising a plurality of cylindrical batteries according to any one of claims 1 to 15.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210371648.4A CN114865183A (en) | 2022-04-11 | 2022-04-11 | Cylindrical battery and battery pack |
| CN2022103716484 | 2022-04-11 |
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| Publication Number | Publication Date |
|---|---|
| CN116169441A true CN116169441A (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210371648.4A Pending CN114865183A (en) | 2022-04-11 | 2022-04-11 | Cylindrical battery and battery pack |
| CN202310068684.8A Pending CN116169441A (en) | 2022-04-11 | 2023-02-06 | Cylindrical battery and battery pack |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210371648.4A Pending CN114865183A (en) | 2022-04-11 | 2022-04-11 | Cylindrical battery and battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824598A (en) * | 2022-04-18 | 2022-07-29 | 江苏正力新能电池技术有限公司 | Cylindrical battery and cap assembly thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115411465A (en) * | 2022-09-21 | 2022-11-29 | 深圳市赛尔摩星科技有限公司 | Cylindrical battery, battery module and electric device |
-
2022
- 2022-04-11 CN CN202210371648.4A patent/CN114865183A/en active Pending
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2023
- 2023-02-06 CN CN202310068684.8A patent/CN116169441A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824598A (en) * | 2022-04-18 | 2022-07-29 | 江苏正力新能电池技术有限公司 | Cylindrical battery and cap assembly thereof |
| CN114824598B (en) * | 2022-04-18 | 2024-04-09 | 江苏正力新能电池技术有限公司 | Cylindrical battery and cap assembly thereof |
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| Publication number | Publication date |
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| CN114865183A (en) | 2022-08-05 |
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