CN109428016A - Secondary cell's top cap subassembly and secondary cell - Google Patents
Secondary cell's top cap subassembly and secondary cell Download PDFInfo
- Publication number
- CN109428016A CN109428016A CN201710762551.5A CN201710762551A CN109428016A CN 109428016 A CN109428016 A CN 109428016A CN 201710762551 A CN201710762551 A CN 201710762551A CN 109428016 A CN109428016 A CN 109428016A
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- component
- pole
- coping plate
- cap assembly
- rotating sheet
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- 230000010485 coping Effects 0.000 claims description 98
- 238000001746 injection moulding Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000007704 transition Effects 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication 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
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 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
- H01M50/147—Lids or covers
-
- 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
-
- 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
-
- 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
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application relates to the technical field of energy storage device production, in particular to a secondary battery and a top cover assembly thereof. The top cover assembly comprises a first terminal assembly and a top cover plate, the first terminal assembly comprises a first conductive block, an overturning sheet, a first pole and a first member, the first conductive block is located on the upper side of the top cover plate, and the overturning sheet is attached to the first conductive block; the top cover plate is provided with a first through hole; the first component is provided with an extension part which is arranged on the periphery of the first through hole and is lapped on the upper side of the top cover sheet; the first pole post penetrates through the first component and is jointed with the first component, and the first pole post is fixed on the top cover plate through the first component. This application can make being connected of first component and top cap piece more reliable to the reliability that first utmost point post and top cap piece are connected has been improved.
Description
Technical field
This application involves energy storage device production technical field more particularly to a kind of cap assemblies and secondary cell.
Background technique
For EV hard shell battery, in order to solve the problems, such as to overcharge, the scheme that industry generallys use is to fail it in electrode assembly
Preceding cutting battery major loop, prevents battery from continuing to charge, to guarantee cell safety.Common structure are as follows: be arranged on coping plate
One end of through-hole, the first pole is electrically connected with electrode assembly, and the other end is inserted into through-hole, and by the way that turning on first terminal is arranged in
Rotor is electrically connected with first terminal.This structure, in order to fix the first pole, the first pole is needed close to the side of electrode assembly
Outer edge beyond through-hole, and need to make itself and insulated plastic by insulated plastic package beyond outer peripheral first pole of through-hole
It fixes, then insulated plastic is fixed on to the lower section of coping plate, so that the first pole be made to be fixed on coping plate.
However, above structure, since insulated plastic is located at the lower section of coping plate, and the first pole is completely by insulated plastic
Glue is fixed, therefore in the long-term use, and the first pole and insulated plastic under gravity, may cause insulated plastic
Glue loosens, and the reliability for causing the first pole to connect with coping plate reduces.Meanwhile it can be occupied when insulated plastic the first pole of package
Enclosure interior space increases cap assembly in the size of thickness direction, to influence the energy density of battery.
Summary of the invention
This application provides a kind of cap assembly of secondary cell and secondary cells, are able to solve the above problem.
The first aspect of the application provides a kind of cap assembly of secondary cell, including first terminal component and top cover
Piece,
The first terminal component includes the first conducting block, rotating sheet, the first pole and first component, and described first is conductive
Block is located at the upside of the coping plate, and the rotating sheet attaches to first conducting block；
The coping plate is provided with first through hole；
The first component has extension, and the extension is set to the periphery of the first through hole, and is overlapped in described
The upside of coping plate；
First pole passes through the first component and engages with the first component, and first pole passes through described
First component is fixed on the coping plate；
Under normal conditions, first pole is electrically connected by the rotating sheet with first conducting block；
When the pressure in secondary cell is more than reference pressure, the rotating sheet overturns and makes the rotating sheet disconnection and institute
State the status of electrically connecting of the first pole.
Preferably, the first component has the second through-hole, and second through-hole is stepped hole and has macropore and aperture,
The macropore is located at the top of the aperture；First pole has clinch, and the clinch is contained in the macropore.
Preferably, the first component has body part, and the body part connects the extension, and the body part is at least
Part is located in the first through hole.
Preferably, the first component is additionally provided with the fixed part for being connected to the extension；It is set on the upside of the coping plate
It is equipped with groove, the direction of downside is directed toward along the upside of the coping plate, the opening of the groove is gradually increased, and the fixed part is filled out
It fills in the groove.
Preferably, first pole includes conductive part and fracture, the rotating sheet by the fracture with it is described
Conductive part electrical connection；When the pressure in the secondary cell is more than reference pressure, the rotating sheet overturning and the fracture
Portion's fracture, so that the rotating sheet disconnects the status of electrically connecting with the conductive part.
Preferably, the conductive part includes first part and second part, and the first part is located at the coping plate
Downside, and the first part at least partly exceeds the outer edge of the first through hole；The second part and described first
Component engagement.
Preferably, the first terminal component further includes first seal, and the first seal is located at described first
Divide between the coping plate.
Preferably, the first terminal component further includes second seal, and the second seal surrounds first structure
Part and between first conducting block and the coping plate.
Preferably, the first component is plastic parts, and the first component is by way of integrated injection molding with described first
Pole engagement.
Preferably, the first terminal component further includes fixing piece and second component, and the second component is set to described
The peripheral surface of the upside of coping plate, first conducting block is at least partly surrounded by the second component, by described
One conducting block is fixed on the second component；
The second component is fixed on the coping plate by the fixing piece.
Preferably, the fixing piece includes interconnecting piece and the extending portion for being connected to the interconnecting piece, the interconnecting piece and institute
Coping plate connection is stated, the extending portion is embedded in the second component and engages with the second component.
Preferably, first conducting block is equipped with venthole, and the venthole is opposite with the rotating sheet.
Preferably, the first terminal component further includes cover board, and the cover board is located at the upside of the venthole and covering
The venthole.
It preferably, further include resistance unit and Second terminal component,
The Second terminal component is electrically insulated with the coping plate；
The first terminal component is electrically connected by the resistance unit with the coping plate.
The second aspect of the application provides a kind of secondary cell, including electrode assembly and described in any item top covers as above
Component, wherein the electrode assembly is including the first pole piece, the second pole piece and between first pole piece and second pole piece
Partition；First pole piece is electrically connected with first pole.
Technical solution provided by the present application can achieve it is following the utility model has the advantages that
The cap assembly of secondary cell provided herein makes extension by the way that extension is arranged on the first part
It is overlapped on coping plate, the first pole is engaged with first component, so that the first pole be made to be fixed on coping plate by first component.
Obviously, after in this way, the connection of first component and coping plate can be made more reliable, even if in the long-term use,
It will not be loosened due to the effect of gravity with coping plate, to improve the reliability that the first pole is connect with coping plate.
Meanwhile first pole in thickness direction can be made thinner, to improve the energy density of secondary cell.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Application.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of specific embodiment of cap assembly provided herein；
Fig. 2 is a kind of explosive view of specific embodiment of cap assembly provided herein；
Fig. 3 is the cross-sectional view in Fig. 1 along line A-A；
Fig. 4 is a kind of partial sectional view of specific embodiment of cap assembly provided herein；
Fig. 5 is the partial sectional view of another specific embodiment of cap assembly provided herein.
Appended drawing reference:
100- coping plate；
101- first through hole；
The first conducting block of 210-；
211- venthole；
212- accommodating chamber；
The first pole of 220-；
221- conductive part；
221a- first part；
221b- second part；
221c- clinch；
222- fracture；
230- first component；
231- extension；
232- body part；
233- fixed part；
240- first seal；
250- third component；
260- second component；
261- third through-hole；
270- fixing piece；
The extending portion 271-；
272- interconnecting piece；
273- transition part；
280- rotating sheet；
290- second seal；
The second conducting block of 310-；
The second pole of 320-；
330- third sealing element；
The 4th component of 340-；
The 5th component of 350-；
400- explosion-proof valve；
500- cover board.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Specific embodiment
The application is described in further detail below by specific embodiment and in conjunction with attached drawing.Wherein, upside, on
Side, downside refer to the upside, top, downside of state shown in attached drawing.
The embodiment of the present application provides a kind of secondary cell, including cap assembly and electrode assembly (not shown), electricity
Pole component includes the first pole piece, the second pole piece and the partition between the first pole piece and the second pole piece, wherein the first pole piece can be with
For positive plate, accordingly, the second pole piece is negative electrode tab；First pole piece can also be negative electrode tab, and accordingly, the second pole piece is anode
Piece.
As shown in Figs. 1-5, the cap assembly of secondary cell includes first terminal component and coping plate 100.First end subgroup
Part includes the first conducting block 210, rotating sheet 280, the first pole 220 and first component 230, and it is logical that coping plate 100 is provided with first
Hole 101；First conducting block 210 is located at the upside of coping plate 100, and the upside of coping plate 100 refers to coping plate 100 far from electrode assembly
Side；Rotating sheet 280 attaches to the first conducting block 210.First component 230 has extension 231, and extension 231 is set to the
The periphery of one through-hole 101, it is preferable that extension 231 along first through hole 101 circumferentially around in the outside of first through hole 101, and
It is overlapped in the upside of coping plate 100.Meanwhile first pole 220 pass through and first component 230 and engaged with first component 230, can be with
Understand ground, the first pole 220 can be by the modes such as be bonded, integrally formed, in this way, the first pole with first component 230
220 are fixed on coping plate 100 by first component 230.
Using the above structure, under normal conditions, the first pole 220 is electrically connected by rotating sheet 280 with the first conducting block 210, i.e.,
First pole piece is electrically connected by the first pole 220, rotating sheet 280 with the first conducting block 210；When the pressure in secondary cell is more than
When reference pressure, when as overcharged, rotating sheet 280, which overturns and disconnects rotating sheet 280, is electrically connected shape with first pole 220
State, and then being electrically connected for the first pole piece and the first conducting block 210 is disconnected, to cut off the major loop of secondary cell.
Above structure makes extension 231 be overlapped in coping plate 100 by the way that extension 231 is arranged in first component 230
On, the first pole 220 is engaged with first component 230, so that the first pole 220 be made to be fixed on coping plate by first component 230
100.Obviously, after in this way, first component 230 and the connection of coping plate 100 can be made more reliable, even if making for a long time
With in the process, will not be loosened due to the effect of gravity with coping plate 100, to improve the first pole 220 and top cover
The reliability that piece 100 connects.Meanwhile first pole in thickness direction can be made thinner, to improve the energy of secondary cell
Density.
Wherein, first component 230 can be plastic parts, or common insulating part or conduct piece, in first component
230 be plastic parts when, first component 230 is engaged by way of integrated injection molding with the first pole 220, with pass through integrated injection molding at
The connection reliability of type increase first component 230 and the first pole 220.
Further, first component 230 has the second through-hole, and the second through-hole is stepped hole and has macropore and aperture, greatly
Hole is located at the top of aperture, i.e., macropore smaller hole is closer to the first conducting block 210, at this point, the first pole 220 has clinch
221c, clinch 221c are contained in macropore, that is to say, that the first pole 220 is overlapped in first component 230, as shown in figure 4, adopting
After in this way, the first pole 220 is applied to the active force of first component 230, the gravity direction phase with the first pole 220
Together, make the first pole 220 closer with the engagement of first component 230 under gravity, and even if after long-term use
The separation of itself and first component 230 will not be caused due to the gravity of the first pole 220, to be further ensured that the first pole 220
The reliability connecting with coping plate 100 is especially connect by way of integrated injection molding in first component 230 with the first pole 220
When, it can preferably increase the reliability that the first pole 220 is connect with first component 230.
Certainly, first component 230 can also be connected only by modes such as bonding, clamping, overlap joints with the first pole 220.
Specifically, first component 230 has body part 232, and body part 232 connects extension 231, and body part 232 is at least
Part be located at first through hole 101 in, i.e., body part 232 can be all set in first through hole 101, can also a part be located at
In first through hole 101, a part is located at the outside of first through hole 101, in this way, especially in first component 230 and the
When one 220 integrated injection molding of pole, since first component 230 is at least partially disposed in first through hole 101, first component can be increased
230 with the connection reliability of coping plate 100, and then increase the bonding strength of the first pole 220 and coping plate 100.
In addition, first component 230, which is additionally provided with, to be connected in order to keep first component 230 and the connection of coping plate 100 more reliable
The fixed part 233 of extension 231, correspondingly, the upside setting of coping plate 100 are fluted, under the direction of the upside of coping plate 100
The opening in the direction of side, groove is gradually increased, and fixed part 233 is filled in groove, and the section of line A-A can along Fig. 1 for fixed part 233
Think trapezium structure, correspondingly, the section of groove line A-A along Fig. 1 is trapezoidal groove, as shown in figure 4, i.e. first component 230
Back-off structure is directly formd with coping plate 100, to further prevent the disengaging of first component 230 Yu coping plate 100.
First pole 220 includes conductive part 221 and fracture 222, and conductive part 221 is connect with fracture 222, wherein disconnected
Splitting portion 222 can be set indentation, keep the thickness at indentation small compared with the thickness at 222 remaining position of fracture, or setting fracture
222 thickness is less than the thickness of conductive part 221, and above-mentioned thickness refers to the size on the direction perpendicular to coping plate 100.Using this
Structure, under normal conditions, rotating sheet 280 is electrically connected by fracture 222 with conductive part 221, that is to say, that conductive part 221 and the
The connection of one pole piece, fracture 222 are connect with rotating sheet 280, and rotating sheet 280 is made to be electrically connected by fracture 222 with conductive part 221
It connects；When the pressure in secondary cell is more than reference pressure, the overturning of rotating sheet 280 and the fracture of fracture 222, i.e. the first pole
220 are broken at fracture 222, so that rotating sheet 280 be made to disconnect the status of electrically connecting with conductive part 221, that is, disconnect first and lead
Fracture 222 is arranged by the first pole 220 in the status of electrically connecting of electric block 210 and the first pole piece, makes the disconnected of the first pole 222
Split that state is controllable, to guarantee the normal work of secondary cell.
Conductive part 221 can be an integral structure with fracture 222, or separate structure.Due to fracture 222
Thickness is easily caused when the two is integrated machine-shaping in fracture 222 to conductive part 221 much smaller than the thickness of conductive part 221
Transition position be broken, cause the yield rate of part too low, therefore, conductive part 221 and fracture 222 are generally using split type
Both that is, structure after processing respectively, then is linked together by the connection types such as welding.
Further, conductive part 221 includes first part 221a and second part 221b, first part 221a and second
221b is divided to be connected, first part 221a is located at the downside of coping plate 100, and first part 221a at least partly exceeds first
The outer edge of through-hole 101, that is to say, that along the direction perpendicular to coping plate 100, the projection of first part 221a at least partly position
Except the edge of the projection of first through hole 101, second part 221b is engaged with first component 230, i.e., the first pole 220 passes through
Second part 221b is connect with first component 230, and when being equipped with clinch 221c, clinch 221c is set to second part 221b
On.In above structure, the part first part 221a is set to exceed the outer edge of first through hole 101, in 220 assembling process of the first pole
In, first part 221a is stopped at coping plate 100, can play position-limiting action to the first pole 220.
Generally, coping plate 100 and the first pole 220 are metalwork, after the two assembly, in order to guarantee secondary cell
Internal leakproofness, first terminal component further include first seal 240, first seal 240 be located at first part 221a and
Between coping plate 100, especially in first component 230 and the first 220 integrated injection molding of pole, first seal 240 can also be into
One step prevents the inside of injection molding liquid inflow secondary cell.
As Such analysis, the first pole 220 and coping plate 100 are metalwork, in order to prevent the first pole 220 and top
Cover plate 100 directly contacts electrical connection, and first terminal component further includes third component 250, third component 250 can for insulating part or
Person's conduct piece is set between coping plate 100 and first part 221a, when being equipped with first seal 240, first seal
240 are set between third component 250 and second part 221b, as shown in Figure 4.
It is to be appreciated that gas and overturning in the case where the internal pressure of secondary cell is certain, inside secondary cell
The bigger eversion pressure of contact area of the lower surface (i.e. one side of the rotating sheet 280 close to the first pole piece) of piece 280 is bigger, that is, overturns
Piece 280 be easier overturn, if the lower surface of rotating sheet 280 only some be connected with internal gas, rotating sheet 280 needs
It is made very big, can guarantee there are enough eversion pressures, for this purpose, connection can be offered on fracture 222 or conductive part 221
Hole (not shown), so that internal gas can be reached everywhere in the lower surface of rotating sheet 280 by intercommunicating pore, but at this time
If the first conducting block 210 is poorly sealed close with coping plate 100, it may cause internal gas leakage, influencing secondary cell just
Often work.For this purpose, first terminal component further includes second seal 290, second seal 290 surrounds first component 230 and position
Between the first conducting block 210 and coping plate 100, i.e., second seal 290 is arranged around the periphery of first component 230, and position
Between the first conducting block 210 and coping plate 100, so that the first conducting block 210, coping plate 100, rotating sheet 280, the first pole
220 spaces surrounded can be only connected to the inside of secondary cell.It should be noted that even if not set intercommunicating pore, first end
Sub-component also may include second seal 290.
In the various embodiments described above, accommodating chamber 212 has been can be set in the first conducting block 210, and rotating sheet 280 is set to accommodating chamber
In 212, to provide overturning space for accommodating rotating sheet 280, and for the overturning of rotating sheet 280.Accommodating chamber 212 can be equipped with
Towards the cascaded surface of the first pole piece, rotating sheet 280 is connected to cascaded surface, to guarantee the position precision of rotating sheet 280.
Outer peripheral edge and the first conducting block 210 when rotating sheet 280 is installed on the first conducting block 210, due to rotating sheet 280
Between be to be tightly connected, therefore be squeezed the gas in accommodating chamber, when secondary cell is in the normal state, rotating sheet 280
The air pressure in accommodating chamber will be born, when rotating sheet 280 is overturn, it is necessary to overcome the pressure, increase rotating sheet 280 in this way
The difficulty of overturning.To solve the above-mentioned problems, the first conducting block 210 is equipped with venthole 211, venthole 211 and 280 phase of rotating sheet
Right, so that accommodating chamber 212 is in communication with the outside by venthole 211, after the installation of rotating sheet 280, rotating sheet 280 is far from the first pole
The side of piece not will form the pressure greater than atmospheric pressure, reduce the active force that rotating sheet overturning needs.
When being equipped with venthole 211, when secondary cell carries out subsequent assembly, detection is even transported, impurity may pass through
Venthole 211 enters accommodating chamber 212, to influence the normal use of rotating sheet 280, or even will cause the corrosion of rotating sheet 280,
Therefore, first terminal component further includes cover board 500, as shown in figure 5, cover board 500 is located at the upside of venthole 211 and covering ventilation
Hole 211, venthole 211 can be equipped with cascaded surface upward, i.e. cascaded surface deviates from rotating sheet 280, and cover board 500 is overlapped in rank
On tread, cover board 500 can be connected to one by way of welding, riveting, the connection of bonding or screw with the first conducting block 210
It rises, to prevent cover board 500 from falling.
In general, first terminal component further includes fixing piece 270 and second component 260, second component 260 can be insulating part
Or conduct piece, second component 260 are set to the upside of coping plate 100, the peripheral surface of the first conducting block 210 is at least partly
It is surrounded by second component 260, the first conducting block 210 is fixed on second component 260, first can be wrapped up with second component 260
The outer peripheral surface of conducting block 210, one setting protrusion, another one such as in the outer peripheral surface of the first conducting block 210 and second component 260
Groove is set, and protrusion insertion groove or the first conducting block 210 are connected to by way of integrated injection molding with second component 260
Together, then second component 260 by fixing piece 270 is fixed on coping plate 100, i.e. fixing piece 270 and coping plate 100, second
Component 260 is separately connected, the first conducting block 210 is fixed on coping plate 100, guarantees the first conducting block by above structure
210 with the positional relationship and connection reliability of coping plate 100.Wherein, outer peripheral surface refers to second component 260 around first through hole
The circumferential surface of 101 axis.
Generally, the first conducting block 210 is also metalwork, and the first conducting block 210 directly connects with coping plate 100 in order to prevent
Electric shock connection, second component 260 are also provided between the first conducting block 210 and coping plate 100, are being equipped with second seal 290
When, second seal 290 can be set between second component 260 and first component 230.
Specifically, the connection type of fixing piece 270 and second component 260 can be integrated the mode of injection molding, or be bonded,
The modes such as clamping.Fixing piece 270 and the connection of coping plate 100 such as can be connect, weld or are clamped using screw at the connection types.
Fixing piece 270 can be metalwork, including interconnecting piece 272 and the extending portion 271 for being connected to interconnecting piece 272, connection
Portion 272 is connect with coping plate 100, generallys use welding manner, extending portion 271 is embedded in second component 260 and and second component
260 engagements in this way, can further facilitate the especially in second component 260 and when 270 integrated injection molding of fixing piece
The connection of one conducting block 210 and coping plate 100.
A kind of embodiment, fixing piece 270 only include extending portion 271 and interconnecting piece 272, and fixing piece 270 can be L-shaped at this time
Structure, as shown in figure 4, the connection of fixing piece 270 and coping plate 100 for convenience, along the extending direction of coping plate 100, connection
Portion 272 can stretch out second component 260, as shown in Figure 4.
Another embodiment, fixing piece 270 further include connection interconnecting piece 272 other than extending portion 271 and interconnecting piece 272
With the transition part 273 of extending portion 271, as shown in figure 5, can make extending portion 271 along with the axis of first through hole 101 in a non-zero
Second component 260 is protruded into the direction of angle, to increase the reliability that second component 260 is connect with fixing piece 270.
Further, there are two extending portion 271 and transition part 273 are all provided with, two transition parts 273 are connected to interconnecting piece
272 both ends, two extending portions 271 connect one to one with two transition parts 273, form fixing piece as shown in Figure 5 several
Font structure, it is clear that this structure, two extending portions 271 are protruded into second component 260, can preferably increase by the second structure
The reliability that part 260 is connect with fixing piece 270.
At this point, the connection of fixing piece 270 and coping plate 100, second component 260 are provided with third through-hole 261 for convenience,
Third through-hole 261 and interconnecting piece 272 are opposite；The one end of extending portion 271 far from transition part 273 to far from third through-hole 261 side
To second component 260 is protruded into, above structure, when fixing piece 270 and coping plate 100 weld, welding gun can protrude into third through-hole
In 261, to facilitate welding.
In addition, cap assembly further includes resistance unit (not shown) and Second terminal component, Second terminal component and top
Cover plate 100 is electrically insulated；First terminal component is electrically connected by resistance unit with coping plate 100, with when drift bolt is tested, due to resistance
Part is series in the circuit of the first pole piece, the first pole 220, coping plate 100, the second pole piece, can reduce the electric current in circuit,
To prevent causing overheat even to be caught fire since electric current is excessive at drift bolt.
Wherein, resistance unit can be set between the first conducting block 210 and coping plate 100, be set in second component 260
When between the first conducting block 210 and coping plate 100, a kind of mode, resistance unit is column structure, and second component 260 is exhausted at this time
Edge part, column structure pass through second component 260 and contact electrical connection with coping plate 100, the first conducting block 210 respectively；Another kind side
Formula, structure, second component 260 are conduct piece to resistance unit in the form of sheets, and resistance unit and second component 260 are integrally formed.
Resistance unit also can be set between the first pole 220 and coping plate 100, be set to first part in resistance unit
When between 221a and coping plate 100, a kind of mode, resistance unit is column structure, and third component 250 is insulating part, cylinder at this time
Structure passes through third component 250 and contacts electrical connection with coping plate 100, the first pole 220 respectively；Another way, resistance unit are in
Laminated structure, third component 250 can be conduct piece, be integrally formed with third component 250.Similarly, is set in electrical component
When between two part 221b and coping plate 100, a kind of mode, resistance unit is column structure, and first component 230 is insulation at this time
Part, column structure pass through first component 230 and contact electrical connection with coping plate 100, the first pole 220 respectively；Another way, electricity
Structure, first component 230 can be conduct piece to resistor in the form of sheets, at this point, resistance unit and the integrated molding of first component 230.
Specifically, as Figure 2-3, Second terminal component includes the second conducting block 310, the second pole 320, the second pole
320 pass through coping plate 100 is electrically connected with the second conducting block 310, in order to prevent the second conducting block 310, the second pole 320 and top cover
Piece 100 is electrically connected, and Second terminal component further includes the 4th component 340 and the 5th component 350, the 4th component 340 and the 5th component
350 be insulating part, and the 4th component 340 is set between coping plate 100 and the second pole 320, and the 5th component 350 is set to top
Between cover plate 100 and the second conducting block 310.Meanwhile in order to guarantee the leakproofness inside secondary cell, Second terminal component is also wrapped
Third sealing element 330 is included, third sealing element 330 is sealed between the second pole 320 and coping plate 100, can be close with third
Sealing 330 is between the second pole 320 and the 4th component 340.
In addition, secondary cell further includes explosion-proof valve 400, explosion-proof valve 400 is installed on coping plate 100.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (15)
1. a kind of cap assembly of secondary cell, which is characterized in that including first terminal component and coping plate,
The first terminal component includes the first conducting block, rotating sheet, the first pole and first component, first conducting block position
In the upside of the coping plate, the rotating sheet attaches to first conducting block；
The coping plate is provided with first through hole；
The first component has extension, and the extension is set to the periphery of the first through hole, and is overlapped in the top cover
The upside of piece；
First pole passes through the first component and engages with the first component, and first pole passes through described first
Component is fixed on the coping plate；
Under normal conditions, first pole is electrically connected by the rotating sheet with first conducting block；
When the pressure in secondary cell is more than reference pressure, the rotating sheet overturn and disconnects the rotating sheet and described the
The status of electrically connecting of one pole.
2. cap assembly according to claim 1, which is characterized in that the first component has the second through-hole, and described the
Two through-holes are stepped hole and have macropore and aperture, and the macropore is located at the top of the aperture；First pole, which has, to be taken
Socket part, the clinch are contained in the macropore.
3. cap assembly according to claim 1, which is characterized in that the first component has body part, the ontology
Portion connects the extension, and the body part is at least partially disposed in the first through hole.
4. cap assembly according to claim 1, which is characterized in that the first component, which is additionally provided with, is connected to the extension
The fixed part in portion；The upside setting of the coping plate is fluted, and the direction of downside is directed toward along the upside of the coping plate, described recessed
The opening of slot is gradually increased, and the fixed part is filled in the groove.
5. cap assembly according to claim 1, which is characterized in that first pole includes conductive part and fracture,
The rotating sheet is electrically connected by the fracture with the conductive part；When the pressure in the secondary cell is more than reference pressure
When, the rotating sheet overturning and fracture is broken, so that the rotating sheet, which is disconnected, is electrically connected shape with the conductive part
State.
6. cap assembly according to claim 5, which is characterized in that the conductive part includes first part and second
Point, the first part is located at the downside of the coping plate, and the first part at least partly exceeds the first through hole
Outer edge；The second part is engaged with the first component.
7. cap assembly according to claim 6, which is characterized in that the first terminal component further includes the first sealing
Part, the first seal is between the first part and the coping plate.
8. cap assembly according to claim 1, which is characterized in that the first terminal component further includes the second sealing
Part, the second seal is around the first component and between first conducting block and the coping plate.
9. cap assembly according to claim 1-7, which is characterized in that the first component is plastic parts, institute
First component is stated to engage by way of integrated injection molding with first pole.
10. cap assembly according to claim 1-7, which is characterized in that the first terminal component further includes
Fixing piece and second component, the second component are set to the upside of the coping plate, the peripheral surface of first conducting block
It is at least partly surrounded by the second component, first conducting block is fixed on the second component；
The second component is fixed on the coping plate by the fixing piece.
11. cap assembly according to claim 10, which is characterized in that the fixing piece includes interconnecting piece and is connected to institute
State the extending portion of interconnecting piece, the interconnecting piece is connect with the coping plate, the extending portion be embedded in the second component and with
The second component engagement.
12. cap assembly according to claim 1-7, which is characterized in that first conducting block is equipped with ventilation
Hole, the venthole are opposite with the rotating sheet.
13. cap assembly according to claim 12, which is characterized in that the first terminal component further includes cover board, institute
State upside and the covering venthole that cover board is located at the venthole.
14. cap assembly according to claim 1-7, which is characterized in that further include resistance unit and Second terminal
Component,
The Second terminal component is electrically insulated with the coping plate；
The first terminal component is electrically connected by the resistance unit with the coping plate.
15. a kind of secondary cell, which is characterized in that including electrode assembly and such as the described in any item top cover groups of claim 1-14
Part, wherein the electrode assembly includes the first pole piece, the second pole piece and between first pole piece and second pole piece
Partition；First pole piece is electrically connected with first pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762551.5A CN109428016B (en) | 2017-08-30 | 2017-08-30 | Secondary cell's top cap subassembly and secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762551.5A CN109428016B (en) | 2017-08-30 | 2017-08-30 | Secondary cell's top cap subassembly and secondary cell |
Publications (2)
| Publication Number | Publication Date |
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| CN109428016A true CN109428016A (en) | 2019-03-05 |
| CN109428016B CN109428016B (en) | 2021-05-18 |
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| CN201710762551.5A Active CN109428016B (en) | 2017-08-30 | 2017-08-30 | Secondary cell's top cap subassembly and secondary cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109980173A (en) * | 2019-04-15 | 2019-07-05 | 欣旺达电子股份有限公司 | A kind of space-efficient power battery top cover and power battery |
| CN111769219A (en) * | 2020-06-09 | 2020-10-13 | 合肥国轩高科动力能源有限公司 | Novel lithium battery cover plate and lithium battery |
| CN113258180A (en) * | 2021-04-28 | 2021-08-13 | 马鞍山南实九九科技有限公司 | Nanometer lithium cell apron of moulding plastics |
| WO2023005464A1 (en) * | 2021-07-27 | 2023-02-02 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electric apparatus |
| WO2024099426A1 (en) * | 2022-11-11 | 2024-05-16 | 深圳海辰储能科技有限公司 | End cover assembly, energy storage apparatus and electrical device |
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| CN109428016B (en) | 2021-05-18 |
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