CN116053666B - End cover assembly, battery cell, energy storage device and electric equipment - Google Patents
End cover assembly, battery cell, energy storage device and electric equipment Download PDFInfo
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- CN116053666B CN116053666B CN202211540128.8A CN202211540128A CN116053666B CN 116053666 B CN116053666 B CN 116053666B CN 202211540128 A CN202211540128 A CN 202211540128A CN 116053666 B CN116053666 B CN 116053666B
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- end cap
- end cover
- pole
- insulator
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- 238000004146 energy storage Methods 0.000 title claims abstract description 30
- 238000003825 pressing Methods 0.000 claims abstract description 44
- 238000009434 installation Methods 0.000 claims abstract description 25
- 230000000670 limiting effect Effects 0.000 claims description 30
- 239000012212 insulator Substances 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 238000003466 welding Methods 0.000 description 24
- 239000000178 monomer Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- 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
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- 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
- H01M50/543—Terminals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses an end cover assembly, a battery cell, an energy storage device and electric equipment, wherein the end cover assembly comprises: the pole is penetrated through the end cover and is electrically insulated from the end cover, the first insulating part is arranged on one side of the thickness direction of the end cover, the second insulating part is arranged on the other side of the thickness direction of the end cover, the first insulating part is provided with an installation space insulated from the end cover, the pole penetrates through the second insulating part and stretches into the installation space, and the pressing block is arranged in the installation space and is sleeved on the pole. Therefore, by arranging the first insulating piece, the second insulating piece and the pressing block, on one hand, the positive electrode output and the negative electrode output can be integrated, the same-side electrode output can be realized, the using amount of the wire harness can be reduced, and the grouping cost is reduced; on the other hand, the pressing block can increase the contact area between the pole and the external electric connection part, and can improve the stability and reliability of electric connection.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an end cover assembly, a battery cell, an energy storage device and electric equipment.
Background
In the related art, the welding track when the battery monomer carries out module welding needs to dodge the protruding structure on the end cover subassembly, and the occupation in the space of protruding structure on the current end cover subassembly is great, can aggravate the welding space occupation in the welding process, and the free anodal of battery is located both ends with the negative pole, and the electricity between a plurality of battery monomers is connected and is needed through longer switching pencil, and the sampling pencil also needs longer that sets up, can't realize welding in same side of a plurality of battery monomers and make a set, leads to the free cost of making a set of batteries higher.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. It is therefore an object of the present invention to provide an end cap assembly that allows for single sided ganging with reasonable welding space usage and low cost.
The invention further provides a battery cell adopting the end cover assembly.
The invention also provides an energy storage device adopting the battery monomer.
The invention further provides electric equipment adopting the energy storage device.
An end cap assembly according to an embodiment of the first aspect of the present invention comprises: the device comprises an end cover, a pole, a first insulating part, a second insulating part and a pressing block, wherein the pole penetrates through the end cover and is electrically insulated from the end cover, the first insulating part is arranged on one side of the thickness direction of the end cover, the second insulating part is arranged on the other side of the thickness direction of the end cover, the first insulating part is provided with an installation space insulated from the end cover, the pole penetrates through the second insulating part and stretches into the installation space, and the pressing block is arranged in the installation space and is sleeved on the pole.
According to the end cover assembly provided by the embodiment of the invention, the first insulating piece, the second insulating piece and the pressing block are arranged, so that on one hand, positive electrode output and negative electrode output can be integrated, same-side electrode output can be realized, the using amount of wire harnesses can be reduced, and the grouping cost is reduced; on the other hand, the pressing block can increase the contact area between the pole and the external electric connection part, and can improve the stability and reliability of electric connection.
According to some embodiments of the invention, the geometric centers of the end cover, the first insulating member, the pole and the pressing block are located on the same straight line, the straight line is parallel to the thickness direction of the end cover, and projections of the end cover, the first insulating member, the pole and the pressing block along the thickness direction of the end cover are all circular.
In some embodiments, the first insulator comprises: the flange is connected with the end cover, the flange and the tray define the installation space, and a pressing block arranged in the end cover can be spaced from the end cover, so that insulation stability and reliability between positive electrode output and negative electrode output are ensured, and reliability and safety of a battery cell adopting the end cover assembly are ensured.
Further, a first positioning part is arranged on one side surface of the tray body facing the end cover, and a second positioning part matched with the first positioning part is arranged on the end cover so as to realize the installation positioning and rotation limiting of the first insulating piece.
Therefore, on one hand, the assembly precision of the first insulating piece on the end cover can be improved so as to improve the coaxiality of the first insulating piece and the end cover, and on the other hand, the stable and reliable limiting effect between the first insulating piece and the end cover can be achieved, the first insulating piece can be prevented from moving, the insulation stability and the reliability can be improved, and therefore the reliability and the safety of the single battery adopting the end cover assembly can be effectively improved.
Further, the projections of the first positioning part and the second positioning part on the thickness direction of the end cover are all non-circular, so that the rotation limiting effect of the first insulating part on the end cover is more stable and reliable.
In some embodiments, the disk body deviates from one side of end cover still is provided with first spacing portion, the briquetting have with first spacing portion complex second spacing portion, first spacing portion with second spacing portion cooperation is realized the installation location and the rotation spacing of briquetting, the briquetting is welded with electric connection structure around by spacing back, can improve welding precision to can improve briquetting and end cover, first insulating part's axiality, accomplish simultaneously after the welding, stabilize, reliably spacing the briquetting, avoid the briquetting to appear rotating or the drunkenness, also can improve briquetting and connection stability and reliability of connection piece.
According to some embodiments of the present invention, one end of the pole is configured as a flange, and the other end of the pole is configured as a rivet joint, so that the end cover, the pole, the first insulating member, the second insulating member and the pressing block are riveted, assembly efficiency can be improved, production cost can be reduced, and the assembled end cover assembly has higher structural strength, more stable relative positional relationship between each component and higher safety and reliability.
According to an embodiment of the second aspect of the present invention, a battery cell includes: the electrode assembly comprises a shell, an electrode assembly, a current collector and an end cover assembly, wherein the shell is provided with a first end and a second end which are oppositely arranged, an opening is formed in the first end, the electrode assembly is arranged in the shell, a first electrode of the electrode assembly is electrically connected with the shell, the current collector is electrically connected with a second electrode of the electrode assembly, the end cover is covered on the opening, the end cover is connected with the shell, and the electrode post is electrically connected with the second electrode of the electrode assembly through the current collector.
According to the battery cell provided by the embodiment of the invention, the output anode and the output cathode of the battery cell are positioned at the same end, when a plurality of battery cells are connected in series or in parallel to form a group, the arrangement difficulty of a switching wire harness and an acquisition wire harness is lower, the wire harness length can be set lower, the wire harness cost is reduced, the length of a connecting sheet between adjacent battery cells can be shorter when the battery cells are arranged in a group, the welding space occupation at the cathode side is more reasonable, the grouping cost can be effectively reduced, and the grouping efficiency is improved.
Further, a liquid injection hole is formed in the second end of the shell.
Further, the liquid injection hole and the geometric center of the pole are positioned in the same straight line, and the straight line is parallel to the thickness direction of the end cover.
Specifically, the pole is located on the axis of the battery monomer, and the liquid injection hole is coaxial with the pole, so that the liquid injection hole is located on the center of the second end of the battery monomer, and the processing efficiency of the battery monomer can be further improved without rotating and positioning in the processes of liquid injection, formation and sealing nail welding.
An energy storage device according to an embodiment of the third aspect of the present invention includes: the battery comprises a plurality of battery cells and at least one connecting sheet, wherein the connecting sheet is used for electrically connecting adjacent battery cells.
According to the energy storage device disclosed by the embodiment of the invention, the battery monomers in the embodiments are connected through the connecting sheet so as to obtain the energy storage device with the electric storage capacity and the output voltage meeting the use requirements, and the connecting sheet, the switching wire harness, the sampling wire harness and the like are arranged on the same side of the energy storage device, so that the space occupation is improved, the energy density is improved, the wire harness consumption is reduced, the material cost is reduced, the assembly efficiency of the energy storage device is improved, the production efficiency is improved, and the assembly cost is reduced.
Further, in the thickness direction of the end cover, the outer end face of the first insulating part is lower than the outer end face of the pressing block, even if the outer end face of the first insulating part is lower than the outer end face of the pressing block, interference of the first insulating part during welding of the connecting sheet and the pressing block can be avoided, so that assembly difficulty is reduced, and assembly efficiency is improved.
Further, the height difference H between the outer end face of the first insulating piece and the outer end face of the pressing block is 0.2-0.5 mm.
Like this, make the difference in height more reasonable, not only can avoid the difference in height too low, can avoid the first insulating part to appear interfering, can also avoid the difference in height too high, can ensure insulating stability, the reliability of first insulating part, reduce the probability that appears the short circuit, improve energy storage device's safety in utilization and reliability.
An electric device according to an embodiment of the fourth aspect of the present invention includes: the energy storage device described in the above embodiment.
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
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of an angular separation of an end cap assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of an end cap assembly according to an embodiment of the present invention, shown disassembled at another angle;
FIG. 3 is a schematic cross-sectional view of an end cap assembly according to an embodiment of the present invention;
Fig. 4 is a schematic view of an angle of a battery cell according to an embodiment of the present invention;
Fig. 5 is a schematic view of another angle of a battery cell according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of an energy storage device according to an embodiment of the invention.
Reference numerals:
the energy storage device (01),
The battery cell 1000, the connection sheet 2000,
The end cap assembly 100, the housing 200,
The end cap 10, the second positioning portion 11,
The pole 20, the rivet head 21,
The first insulator 30, the tray 31, the first positioning portion 311, the first stopper portion 312, the flange 32,
The second insulating member 40 is provided with a plurality of insulating members,
The pressing block 50, the second limiting part 51,
The filling hole 210.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
An end cap assembly 100, a battery cell 1000, an energy storage device 01, and a powered device according to an embodiment of the present invention are described below with reference to fig. 1-6.
As shown in fig. 1, 2 and 3, an end cap assembly 100 according to an embodiment of the first aspect of the present invention includes: the end cap 10, the pole 20, the first insulator 30, the second insulator 40, and the compact 50.
The pole 20 penetrates through the end cover 10 and is electrically insulated from the end cover 10, the first insulating member 30 is disposed on one side of the end cover 10 in the thickness direction, the second insulating member 40 is disposed on the other side of the end cover 10 in the thickness direction, the first insulating member 30 has an installation space insulated from the end cover 10, the pole 20 penetrates through the second insulating member 40 and extends into the installation space, and the pressing block 50 is disposed in the installation space and is sleeved on the pole 20.
Specifically, the end cap 10 is connected to the case 200 and is formed as a first output electrode (positive output or negative output), the post 20 (corresponding to negative output or positive output) is inserted through the end cap 10 and spaced apart from the end cap 10 in a radial direction, the post 20 is connected to the current collector, the first insulating member 30 is disposed at one side of the end cap 10, the second insulating member 40 is disposed at the other side of the end cap 10, and the first insulating member 30 has an installation space insulated from the end cap 10, the post 20 passes through the second insulating member 40 and extends into the installation space, and the pressing block 50 is disposed in the installation space and is sleeved on the post 20.
The casing 200 is generally made of metal materials, in order to improve corrosion resistance and oxidation resistance of the casing 200, the casing 200 is generally positively charged, while the end cover 10 is connected with the casing 200, so that the end cover 10 is formed into a positive output, the pole post 20 penetrates through the end cover 10 and is insulated from the end cover 10 through the first insulating member 30 and the second insulating member 40, so as to form a negative output, and further, through the pressing block 50 sleeved on the pole post 20, the contact area of the pole post 20 and an external electric connection part is increased.
Illustratively, the battery cell is configured as a cylindrical battery, the end cap 10 is configured as a disk, and is provided with first through holes, the first insulating member 30 and the second insulating member 40 are respectively disposed on opposite sides of the end cap 10, are each configured as a circular truncated cone with second through holes, and pass through the first through holes, and the pole post 20 passes through the second through holes, so as to space the first output electrode from the pole post 20 through the first insulating member 30 and the second insulating member 40, thereby realizing integration of the positive output and the negative output on one end cap assembly 100.
It will be appreciated that the first output pole and the pole post 20 are integrated in one end cap assembly 100, when the battery unit 1000 is connected in series-parallel or directly supplies power to external electric equipment, the positive output and the negative output can be led out from the same side, the switching harness and the sampling harness can be switched and sampled from the same side, the harness cost can be reduced, and the grouping cost can be reduced.
It should be noted that, when the end cover 10 is used for a cylindrical battery cell, the thickness direction of the end cover 10 corresponds to the circumferential direction of the battery cell, and when the end cover 10 is used for a square battery cell, the thickness direction of the end cover 10 corresponds to the height direction of the battery cell.
According to the end cover assembly 100 provided by the embodiment of the invention, by arranging the first insulating piece 30, the second insulating piece 40 and the pressing block 50, on one hand, positive electrode output and negative electrode output can be integrated, same-side electrode output can be realized, the using amount of wire harnesses can be reduced, and the grouping cost is reduced; on the other hand, the pressing block 50 can increase the contact area of the pole 20 with external electrical connection parts, and can improve the electrical connection stability and reliability.
In some embodiments, the geometric centers of the end cap 10, the first insulator 30, the pole 20, and the compact 50 are positioned on the same straight line, which is parallel to the thickness direction of the end cap 10, and the projections of the end cap 10, the first insulator 30, the pole 20, and the compact 50 along the thickness direction of the end cap 10 are all circular.
It should be noted that, in the process of grouping the battery monomers 1000, the welding track of the module is generally circular, and by adopting the end cover assembly 100 of the embodiment of the present invention, the geometric centers of the end cover 10, the first insulating member 30, the pole post 20 and the pressing block 50 are located in the same straight line (i.e. coaxially arranged), and the projections in the thickness direction are all circular, so that the distances from the peripheral edges of the first insulating member 30, the pole post 20, the pressing block 50 and other parts protruding from the end cover 10 in the thickness direction to the peripheral edges of the end cover 10 are consistent, the space occupation of the structure protruding from the end cover 10 is reduced, the welding space occupation of the pole post 20 and the pressing block 50 can be reduced, when the anode output and the cathode output are welded on the same side, the welding space occupation of the cathode side is smaller, and larger space is reserved for welding the end cover 10 and the connecting sheet 2000, that is reserved for the anode side, the space occupation of the welding on the same side can be improved, the technical problem of insufficient welding space occupation of the connecting sheet 2000 is solved on the premise of realizing the same side electrode output is reduced, and the grouping cost is also reduced.
Meanwhile, in the embodiment of the end cover assembly 100 for the cylindrical battery, the pole 20 is located on the axis of the end cover assembly 100, and the end cover assembly 100 does not need to be rotated and positioned in the process of testing Hi-point, formation, capacity, OCV, top-sticking patch, coating and the like in the process of producing the battery cell, so that the production efficiency can be improved.
From this, make end cover 10, first insulating part 30, utmost point post 20 and briquetting 50 coaxial setting, all be located the axis of end cover subassembly 100, and the projection in axial is circular, can reduce the welding space occupation of negative pole side, be convenient for anodal side (end cover 10), negative pole side (utmost point post 20) and connection piece 2000 (aluminium bar) are being connected in the electricity of homonymy, avoid welding space not enough, and in the battery monomer 1000 course of working, need not rotational positioning, can improve production efficiency.
As shown in fig. 2 and 3, according to some embodiments of the present invention, the first insulating member 30 includes: the tray 31 and the flange 32 that is located the periphery side of tray 31, and tray 31 links to each other with end cover 10, and flange 32 and tray 31 define the installation space.
Specifically, at least part of the tray 31 and/or at least part of the second insulating member 40 extends into the first via hole of the end cap 10 and radially spaces the post 20 from the end cap 10 to achieve insulation between the positive and negative outputs, avoiding shorting of the unit cells, while the flange 32 is formed on the circumferential side of the tray 31 and extends away from the second insulating member 40 to form an installation space that is also spaced from the end cap 10 to space the press block 50 disposed in the end cap 10 from the end cap 10 to ensure insulation stability, reliability, and safety of the battery cell 1000 employing the end cap assembly 100 of the embodiment of the present invention.
As shown in fig. 1 and 2, further, a first positioning portion 311 is disposed on a surface of the disc 31 facing the end cover 10, and a second positioning portion 11 cooperating with the first positioning portion 311 is disposed on the end cover 10, so as to realize installation positioning and rotation limitation of the first insulating member 30.
Specifically, the first positioning portion 311 and the second positioning portion 11 may be in a plugging fit or a clamping fit to achieve positioning and positioning, and after the first insulating member 30 and the end cover 10 are positioned and positioned by the plugging fit or the clamping fit of the first positioning portion 311 and the second positioning portion 11, on one hand, the assembly precision of the first insulating member 30 on the end cover 10 can be improved to improve the coaxiality of the first insulating member and the end cover 10, and on the other hand, the stable and reliable positioning effect between the first insulating member and the end cover 10 can be achieved, and the first insulating member 30 can be prevented from moving to improve the insulation stability and reliability, so that the reliability and the safety of the single battery adopting the end cover assembly 100 of the embodiment of the invention are effectively improved.
Illustratively, the first positioning portion 311 is in plug-in fit with the second positioning portion 11, the first positioning portion 311 is configured as a plug pin, and the second positioning portion 11 is configured as a socket in fit with the plug pin, or the second positioning portion 11 is configured as a plug pin, corresponding to the first positioning portion 311 being configured as a socket.
As shown in fig. 1 and 2, the projections of the first positioning portion 311 and the second positioning portion 11 in the thickness direction of the end cap 10 are preferably non-circular.
For example, the first positioning portion 311 is configured as a cross bump, a Y bump, or the like, and has a non-circular protruding structure extending in at least two directions with an included angle therebetween, and the corresponding second positioning portion 11 is formed as a corresponding cross groove or Y groove, so that the axial positioning is realized, the coaxiality is improved, the limiting effect of the rotation limitation is more reliable, and the stable and reliable rotation limitation of the first insulating member 30 can be realized.
In the embodiment shown in fig. 1 and 2, a first limiting portion 312 is further disposed on a side, facing away from the end cover 10, of the disc 31, the pressing block 50 is provided with a second limiting portion 51 matched with the first limiting portion 312, and the first limiting portion 312 is matched with the second limiting portion 51 to achieve installation positioning and rotation limiting of the pressing block 50.
Specifically, the first limiting portion 312 and the second limiting portion 51 may be in an inserting fit or a clamping fit to achieve limiting and positioning, the pressing block 50 is positioned and fixed on the first insulating member 30 through the first limiting portion 312 and the second limiting portion 51, after the pressing block 50 is positioned, the structure that the connecting piece 2000 and other external devices are electrically connected with the battery cell 1000 can be welded on the pressing block 50 and the pole 20, the contact area of the pole 20 and the connecting piece 2000 and other structures is increased, and the electrical connection stability is improved.
It can be appreciated that the pressing block 50 is welded with the surrounding electrical connection structure (for example, the connection sheet 2000) after being limited, so that the welding precision can be improved, the coaxiality of the pressing block 50, the end cover 10 and the first insulating member 30 can be improved, and after the welding is completed, the pressing block 50 is stably and reliably limited, so that the pressing block 50 is prevented from rotating (namely, the anti-torsion performance of the end cover assembly 100 is improved), the connection stability and reliability of the pressing block 50 and the connection sheet 2000 can be improved, the welding-free phenomenon is avoided, and the use safety and reliability of the battery cell 1000 are further improved.
Illustratively, the first limiting portion 312 is in plug-in fit with the second limiting portion 51, the first limiting portion 312 is configured as a plug pin, and the second limiting portion 51 is configured as a socket that mates with the plug pin, or the second limiting portion 51 is configured as a plug pin, corresponding to the first limiting portion 312, the number of the plug pins is at least two, and corresponding to the number of the plug pins, the number of the plug pins is at least two.
As shown in fig. 1, 2 and 3, according to some embodiments of the present invention, one end of the pole 20 is configured as a flange, and the other end of the pole 20 is configured as a rivet head 21 to rivet the end cap 10, the pole 20, the first insulating member 30, the second insulating member 40 and the pressing block 50.
That is, the end cap 10, the pole 20, the first insulating member 30, the second insulating member 40 and the pressing block 50 may be riveted through the pole 20 configured as the rivet joint 21, and the plurality of parts in the end cap assembly 100 may be assembled through the form of riveting, so that the assembly efficiency may be improved, the production cost may be reduced, and the structural strength of the assembled end cap assembly 100 may be higher, the relative positional relationship between the respective parts may be more stable, and the safety and reliability may be higher.
As shown in fig. 4 and 5, a battery cell 1000 according to an embodiment of the second aspect of the present invention includes: the electrode assembly comprises a shell 200, an electrode assembly and an end cover assembly 100, wherein the shell 200 is provided with a first end and a second end which are oppositely arranged, an opening is formed in the first end, the electrode assembly is arranged in the shell 200, a first electrode of the electrode assembly is electrically connected with the shell 200, a current collector is electrically connected with a second electrode of the electrode assembly, an end cover 10 covers the opening, the end cover 10 is connected with the shell 200, and a pole is electrically connected with the second electrode of the electrode assembly through the current collector.
Illustratively, the case 200 is constructed in a cylindrical or rectangular box, the electrode assembly includes one or more winding cores, and is disposed in the case 200, the first electrode (positive tab) of the electrode assembly is directly connected to the case 200, the case 200 is connected to the end cap 10 such that the end cap 10 is formed as a first output electrode (output positive electrode), and the second electrode of the electrode assembly is connected to the electrode post 20 (i.e., output negative electrode) through a current collector such that the first output electrode and the electrode post 20 are integrated on the end cap assembly 100, and the output positive electrode and the output negative electrode of the battery cell 1000 can be implemented to be located at the same end.
According to the battery cell 1000 of the embodiment of the invention, the output anode and the output cathode of the battery cell 1000 are positioned at the same end, when a plurality of battery cells 1000 are connected in series or in parallel to form a group, the arrangement difficulty of a switching wire harness and an acquisition wire harness is lower, the wire harness length can be set lower, the wire harness cost is reduced, the length of a connecting sheet 2000 between adjacent battery cells 1000 can be shorter when the battery cells are arranged in a group, the welding space occupation of the cathode side is more reasonable, the grouping cost can be effectively reduced, and the grouping efficiency is improved.
As shown in fig. 4 and 5, further, a liquid injection hole 210 is provided at the second end of the housing 200, and the liquid injection hole 210 is positioned in the same line as the geometric center of the pole 20, and the line is parallel to the thickness direction of the end cap.
Specifically, the post 20 is located on the axis of the battery cell 1000 (i.e., the axis of the end cap assembly 100), and the liquid injection hole 210 is coaxial with the post 20, so that the liquid injection hole 210 is located on the center of the second end of the battery cell 1000, and in the processes of liquid injection, formation and sealing nail welding, no rotational positioning is required, so that the processing efficiency of the battery cell 1000 can be further improved.
As shown in fig. 6, an energy storage device 01 according to an embodiment of the third aspect of the present invention includes: a plurality of battery cells 1000 and at least one connection tab 2000, the connection tab 2000 being for electrically connecting adjacent battery cells 1000.
The energy storage device 01 may be a battery module, a battery cluster, a battery pack, or the like, that is, the energy storage device 01 meets the use requirement by one battery unit 1000, or by connecting a plurality of battery units 1000 in series, parallel or series-parallel connection to obtain output voltage and power storage capability.
Specifically, adjacent battery cells 1000 are connected by a connecting sheet 2000, for example: the connection piece 2000 may include a first plate portion having a height difference in an axial direction, the first plate portion being connected with the pressing block 50 of one battery cell 1000 and the pole 20, and a second plate portion being connected with an end surface of the end cap 10 of an adjacent other battery cell 1000 to achieve the serial connection of the adjacent battery cells 1000; it is also possible to realize the parallel connection of the battery cells 1000 in groups by providing two connection plates 2000 having a longer length, one connection plate 2000 being electrically connected with the end cap 10 of the battery cell 1000 in a row, and the other connection plate 2000 being connected with the pole 20 and the pressing block 50 of the battery cell 1000 in the row.
According to the energy storage device 01 provided by the embodiment of the invention, the battery cells 1000 in the embodiments are connected through the connecting sheet 2000, so that the energy storage device 01 with the electric storage capacity and the output voltage meeting the use requirements is obtained, the connecting sheet 2000, the switching wire harness, the sampling wire harness and the like are all arranged on the same side of the energy storage device 01, the space occupation is improved, the energy density is improved, the wire harness consumption is reduced, the material cost is reduced, the assembly efficiency of the energy storage device 01 is improved, the production efficiency is improved, and the assembly cost is reduced.
Further, referring to fig. 3, the outer end surface of the first insulating member 30 is lower than the outer end surface of the pressing block 50 in the thickness direction of the end cap 10.
Wherein, the briquetting 50 cover is established on the utmost point post 20, and after the end cover subassembly 100 presses and rivets, can ensure that briquetting 50 links to each other with utmost point post 20, and connection piece 2000 links to each other with briquetting 50, utmost point post 20, can increase the area of contact of connection piece 2000 with the output pole of battery cell 1000, with the stability of improving electric connection, improve the overcurrent capacity, avoid local overheated, lead to connection piece 2000 to weld, improve safety in utilization and operational reliability, and make the outer terminal surface of first insulating part 30 (i.e. the outer terminal surface of flange 32) be less than the outer terminal surface of briquetting 50, when can avoid connection piece 2000 and briquetting 50 welding, first insulating part 30 appears interfering, with the reduction assembly degree of difficulty, improve assembly efficiency.
It should be noted that, with respect to the battery cell 1000, the inside and the outside of the present invention are the inside with respect to the direction toward the electrode assembly, and the outside with respect to the direction away from the electrode assembly, and the materials of the pressing block 50 and the electrode post 20 may be the same or different.
Preferably, the height difference H between the outer end surface of the first insulator 30 and the outer end surface of the press block 50 is 0.2mm to 0.5mm.
Like this, make the difference in height more reasonable, not only can avoid the difference in height too low, can avoid the first insulating part 30 to appear interfering, can also avoid the difference in height too high, can ensure insulating stability, the reliability of first insulating part 30, reduce the probability that appears the short circuit, improve energy storage device 01's safety in utilization and reliability.
An electric device according to an embodiment of the fourth aspect of the present invention includes: the energy storage device 01 in the above embodiment has the same technical effects as the energy storage device 01, and will not be described herein.
It should be noted that the electric equipment may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the invention does not limit the electric equipment in particular.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the invention, a "first feature" or "second feature" may include one or more of such features.
In the description of the present invention, "plurality" means two or more.
In the description of the invention, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.
In the description of the invention, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. An end cap assembly, comprising:
An end cap (10);
-a pole (20), the pole (20) being threaded through the end cap (10) and being electrically insulated from the end cap (10);
A first insulator (30) and a second insulator (40), wherein the first insulator (30) is arranged on one side of the end cover (10) in the thickness direction, the second insulator (40) is arranged on the other side of the end cover (10) in the thickness direction, the first insulator (30) is provided with an installation space insulated from the end cover (10), and the pole (20) penetrates through the second insulator (40) and stretches into the installation space;
the end cover (10) is provided with a first through hole, the first insulating piece (30) and the second insulating piece (40) are both constructed as bosses with second through holes, the first through holes are penetrated, and the pole is penetrated through the second through holes;
The pressing block (50) is arranged in the installation space and sleeved on the pole (20);
the first insulator (30) includes: a tray body (31) and a flange (32) positioned on the periphery of the tray body (31), wherein the tray body (31) is connected with the end cover (10), and the flange (32) and the tray body (31) define the installation space;
one side of the disc body (31) deviating from the end cover (10) is further provided with a first limiting part (312), the pressing block (50) is provided with a second limiting part (51) matched with the first limiting part (312), and the first limiting part (312) is matched with the second limiting part (51) so as to realize the installation and positioning and rotation limiting of the pressing block (50).
2. The end cap assembly according to claim 1, wherein the geometric centers of the end cap (10), the first insulator (30), the pole (20) and the compact (50) are located on the same straight line, which is parallel to the thickness direction of the end cap (10), and the projections of the end cap (10), the first insulator (30), the pole (20) and the compact (50) along the thickness direction of the end cap (10) are all circular.
3. End cap assembly according to claim 1, wherein a first positioning portion (311) is provided on a side surface of the disc body (31) facing the end cap (10), and a second positioning portion (11) cooperating with the first positioning portion (311) is provided on the end cap (10) to realize installation positioning and rotation limitation of the first insulating member (30).
4. An end cap assembly according to claim 3, wherein the projections of the first positioning portion (311) and the second positioning portion (11) in the thickness direction of the end cap (10) are non-circular.
5. The end cap assembly of any one of claims 1-4, wherein one end of the post (20) is configured as a flange and the other end of the post (20) is configured as a rivet (21) to rivet the end cap (10), the post (20), the first insulator (30), the second insulator (40), and the compact (50).
6. A battery cell, comprising:
a housing (200), the housing (200) having oppositely disposed first and second ends, the first end having an opening formed therein;
an electrode assembly disposed within the housing (200), and a first electrode of the electrode assembly is electrically connected with the housing (200);
A current collector electrically connected to the second electrode of the electrode assembly;
The end cap assembly of any one of claims 1-5, said end cap (10) covering said opening, and said end cap (10) being connected to said housing (200), said post being electrically connected to a second electrode of said electrode assembly by a current collector.
7. The battery cell of claim 6, wherein the second end of the housing (200) is provided with a fill port (210).
8. The battery cell according to claim 7, wherein the liquid injection hole (210) is located in a same straight line as the geometric center of the pole (20), the straight line being parallel to the thickness direction of the end cap (10).
9. An energy storage device, comprising:
a plurality of the battery cells of any one of claims 6-8;
And at least one connecting sheet for electrically connecting adjacent battery cells.
10. Energy storage device according to claim 9, characterized in that the outer end face of the first insulating member (30) is lower than the outer end face of the press block (50) in the thickness direction of the end cap (10).
11. The energy storage device according to claim 10, characterized in that the height difference H between the outer end surface of the first insulating member (30) and the outer end surface of the pressing block (50) is 0.2mm to 0.5mm.
12. A powered device, comprising: the energy storage device of any one of claims 9-11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211540128.8A CN116053666B (en) | 2022-11-30 | 2022-11-30 | End cover assembly, battery cell, energy storage device and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211540128.8A CN116053666B (en) | 2022-11-30 | 2022-11-30 | End cover assembly, battery cell, energy storage device and electric equipment |
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| CN116053666A CN116053666A (en) | 2023-05-02 |
| CN116053666B true CN116053666B (en) | 2024-07-23 |
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| CN202211540128.8A Active CN116053666B (en) | 2022-11-30 | 2022-11-30 | End cover assembly, battery cell, energy storage device and electric equipment |
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| CN217656024U (en) * | 2022-06-29 | 2022-10-25 | 蜂巢能源科技股份有限公司 | Battery and energy storage device |
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| CN207818750U (en) * | 2018-02-12 | 2018-09-04 | 宁德时代新能源科技股份有限公司 | Battery modules |
| CN111490190B (en) * | 2019-01-25 | 2021-08-10 | 比亚迪股份有限公司 | Battery cover plate, battery and vehicle |
| CN112864510B (en) * | 2021-04-23 | 2021-08-03 | 苏州清陶新能源科技有限公司 | Soft package battery pack |
| CN215497007U (en) * | 2021-07-30 | 2022-01-11 | 宁德时代新能源科技股份有限公司 | Battery monomer, battery and consumer |
| WO2023092500A1 (en) * | 2021-11-26 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
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| CN217656024U (en) * | 2022-06-29 | 2022-10-25 | 蜂巢能源科技股份有限公司 | Battery and energy storage device |
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