CN208062214U - Secondary cell - Google Patents
Secondary cell Download PDFInfo
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- CN208062214U CN208062214U CN201820598920.1U CN201820598920U CN208062214U CN 208062214 U CN208062214 U CN 208062214U CN 201820598920 U CN201820598920 U CN 201820598920U CN 208062214 U CN208062214 U CN 208062214U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
This application involves energy storage device technical field more particularly to a kind of secondary cells, including：Shell is provided with opening；Head cover closes with the case lid, and seals the opening；Electrode assembly is set in the shell, and the electrode assembly includes the first pole piece, the second pole piece and the isolation film being set between first pole piece and second pole piece；And insulating part, it is wrapped in the outside of the electrode assembly；The insulating part is provided with engraved structure away from the side of the head cover；Away from the side of the head cover, second pole piece stretches out the engraved structure and is contacted with the shell.The application compared with electrode assembly heat in such a way that backing board is transferred to shell, thermally conductive pathways shorten, and so as to improve the heat transfer efficiency of secondary cell, avoid in secondary cell heat from assembling, improve the safety of secondary cell.
Description
Technical field
This application involves energy storage device technical field more particularly to a kind of secondary cells.
Background technology
Secondary cell is widely used in mobile phone, laptop due to energy density height, advantages of environment protection
Equal electronic devices.In recent years, for response environment problem, gas price problem and energy stores problem, secondary cell is answered
With Quick Extended to oily electricity mixed motor-car and energy storage system etc..
Existing secondary cell is as Figure 1-Figure 2, including shell 110 and the electrode assembly that is contained in shell 110
120, electrode assembly 120 include the second pole piece 122, the first pole piece 121 and be set to the second pole piece 122 and the first pole piece 121 it
Between isolation film 123.When secondary cell assembles, insulating part 130 first is wrapped up in the outside of electrode assembly 120, insulating part 130
Bottom is provided with backing board 140, and then electrode assembly 120, insulating part 130 and backing board 140 are put into togerther in shell 110.
In secondary cell test or in use, electrode assembly 120 can generate heat, the transmission path of the heat of generation mainly has two, and one
It is that the side that insulating part 130 is transmitted to shell 110 again is transmitted to by electrode assembly 120；Second is that being transmitted by electrode assembly 120
To the bottom of insulating part 130, then it is transmitted to backing board 140, is eventually transferred into the bottom of shell 110.
Obviously, above-mentioned Article 2 transmission path need to pass through insulating part 130, backing board 140 can just be transferred to the bottom of shell 110
Portion increases the resistance that 120 heat of electrode assembly is transmitted, and when secondary cell is under high current operating mode, heat production is particularly acute,
If can not conduct heat as early as possible, service life and the use of secondary cell can be influenced, results even in the safety accidents such as catch fire.
Utility model content
This application provides a kind of secondary cells, can solve the above problems.
This application provides a kind of secondary cells, including：
Shell is provided with opening；
Head cover closes with the case lid, and seals the opening；
Electrode assembly is set in the shell, and the electrode assembly is including the first pole piece, the second pole piece and is set to institute
State the isolation film between the first pole piece and second pole piece；With
Insulating part is wrapped in the outside of the electrode assembly；
The insulating part is provided with engraved structure away from the side of the head cover；It is described away from the side of the head cover
Second pole piece stretches out the engraved structure and is contacted with the shell.
Optionally, away from the side of the head cover, second pole piece exceeds first pole piece and the isolation film,
Second pole piece stretches out the engraved structure and is contacted with the shell.
Optionally, away from the side of the head cover, the isolation film wraps up first pole piece.
Optionally, the isolation film positioned at first pole piece both sides is smoothly connected away from one end of the head cover.
Optionally, the bottom of the electrode assembly exposes the engraved structure completely.
Optionally, first pole piece includes the first noumenon portion and the first lug for extending from the first noumenon portion；Institute
It includes the second body part and the second lug for extending from second body part to state the second pole piece；First lug and described the
Two lugs are set to the electrode assembly close to the side of the head cover；
Close to the side of the head cover, the isolation film wraps up first pole piece or second pole piece, and institute
The end for stating the first lug and second lug exposes the isolation film.
Optionally, at first lug, first pole piece is close beyond the isolation film and second pole piece
The side of the head cover, the isolation film positioned at same second pole piece both sides are mutually interconnected close to one end of the head cover
It connects, to wrap up second pole piece.
Optionally, the electrode assembly has the first side and the second side along the thickness direction of the secondary cell；Described
One lug and second lug may be contained within first side.
Optionally, in the second side, each isolation film links together close to one end of the head cover, each to wrap up
First pole piece.
Optionally, the isolation film of interconnection is connected by hot melting way or bonding way.
Technical solution provided by the present application can reach following advantageous effect：
Secondary cell provided herein, insulating part are provided with engraved structure, deviate from the side of head cover in electrode assembly,
So that the second pole piece of electrode assembly is passed through the engraved structure, and contacted with shell, the heat in electrode assembly is directly passed through
Second pole piece is conducted to shell, it is clear that this mode, compared with electrode assembly heat in such a way that backing board is transferred to shell,
Thermally conductive pathways are shortened, so as to improve the heat transfer efficiency of secondary cell, avoids heat in secondary cell from assembling, improves secondary
The safety of battery.
It should be understood that above general description and following detailed description is merely exemplary, this can not be limited
Application.
Description of the drawings
Fig. 1 is the explosive view of secondary cell in background technology；
Fig. 2 is the partial sectional view of secondary cell in background technology；
Fig. 3 is a kind of front view of specific embodiment of secondary cell provided herein；
Fig. 4 is a kind of explosive view of specific embodiment of secondary cell provided herein；
Fig. 5 is the sectional view of the line A-A along Fig. 3；
Fig. 6 is the partial enlarged view at I in Fig. 5；
Fig. 7 is the structural schematic diagram of a kind of specific embodiment of insulating part in secondary cell provided herein；
Fig. 8 is the structural schematic diagram of a kind of specific embodiment of electrode assembly in secondary cell provided herein；
Fig. 9 is the front view of electrode assembly embodiment shown in Fig. 8；
Figure 10 is the sectional view of the line B-B along Fig. 9；
Figure 11 is the partial enlarged view at II in Figure 10；
Figure 12 is the sectional view of another specific embodiment of electrode assembly in secondary cell provided herein；
Figure 13 is the partial enlarged view at III in Figure 12；
Figure 14 is that III is in partial enlarged view when the second pole piece is broken in Figure 12.
Reference numeral：
In Fig. 1-Fig. 2：
110- shells；
120- electrode assemblies；
The first pole pieces of 121-；
The second pole pieces of 122-；
123- isolation films；
130- insulating parts；
140- backing boards；
In Fig. 3-14 figures：
210- shells；
220- electrode assemblies；
The first pole pieces of 221-；
2211- the first noumenons portion；
The first lugs of 2212-；
The second pole pieces of 222-；
The second body parts of 2221-；
The second lugs of 2222-；
223- isolation films；
At the top of 224-；
The bottoms 225-；
The sides 226-；
230- insulating parts；
231- engraved structures.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and the principle together with specification for explaining the application.
Specific implementation mode
It is described in further detail below by specific embodiment and in conjunction with attached drawing to the application.Wherein, with attached drawing
Shown in secondary cell be object, and using the short transverse of secondary cell as short transverse Z, with the length direction of secondary cell
For length direction X X-Y-Z rectangular coordinate systems are established using the thickness direction of secondary cell as thickness direction Y.
As shown in Fig. 3-Figure 14, the embodiment of the present application provides a kind of secondary cell, including shell 210, head cover are (in figure not
Show), electrode assembly 220 and insulating part 230, shell 210 be provided with opening；Head cover is closed with the lid of shell 210, and sealed opening,
So that the inside of the two forms accommodating chamber.Electrode assembly 220 is set in shell 210, i.e., electrode assembly 220 is contained in accommodating chamber
Interior, electrode assembly 220 includes the first pole piece 221, the second pole piece 222 and is set between the first pole piece 221 and the second pole piece 222
Isolation film 223.Insulating part 230 is wrapped in the outside of electrode assembly 220, is set between electrode assembly 220 and shell 210,
Electrode assembly 220 and shell 210 to be insulated.Wherein, insulating part 230 is provided with engraved structure 231 away from the side of head cover；?
Engraved structure 231 is stretched out away from the side of head cover, in the second pole piece 222 and is contacted with shell 210.
Above-mentioned secondary cell, insulating part 230 are provided with engraved structure 231, deviate from the side of head cover in electrode assembly, make electricity
Second pole piece 222 of pole component 220 passes through the engraved structure 231, and is contacted with shell 210, by the heat in electrode assembly 220
Amount is directly conducted by the second pole piece 222 to shell 210, it is clear that this mode, the heat compared with electrode assembly 220 pass through collet
Plate is transferred to the mode of shell 210, and thermally conductive pathways shorten, and so as to improve the heat transfer efficiency of secondary cell, avoids secondary
Heat is assembled in battery, improves the safety of secondary cell.
It is to be appreciated that secondary cell further includes the first pole (not shown) and the second pole (not shown),
First pole and the second pole are set to head cover, and the first pole piece 221 is electrically connected with the first pole, the second pole piece 222 and the second pole
Column is electrically connected, and the electric signal of electrode assembly 220 is transferred to the outside of secondary cell.
The first pole piece 221, the second pole piece 222 and the isolation film 223 of electrode assembly 220 are both provided with multilayer, and three can be with
Multilayered structure is formed by winding method.Wherein, the first pole piece 221 includes the first noumenon portion 2211 and from the first noumenon portion 2211
The first lug 2212 stretched out；Second pole piece 222 include the second body part 2221 and from the second body part 2221 stretch out second
Lug 2222, when winding, the first noumenon portion 2211, isolation film and the second body part 2221 are cascading, the first pole of multilayer
Ear 2212 is stacked, and the second lug of multilayer 2222 is stacked, and the first lug 2212 and the second lug 2222 are along secondary electricity
The length direction X settings in pond.It is to be appreciated that electrode assembly 220 has the top 224 opposite with head cover and top 224 opposite
Bottom 225 and connection top 224 and bottom 225 side 226, top 224 and bottom 225 are along the height side of secondary cell
It is oppositely arranged to Z, the first lug 2212 and the second lug 2222 can be set to electrode assembly 220 close to the side of head cover, such as
Shown in Fig. 8, Fig. 9, the top 224 of electrode assembly 220 can be located at.In electrode assembly 220 and the first pole and the second pole electricity
When connection, the first pole piece 221 is electrically connected by the first lug 2212 with the first pole, and the second pole piece 222 passes through the second lug
2222 are electrically connected with the second pole.In order to improve the energy density of secondary cell, the first lug 2212 and the second lug 2222 can
To be in bending structure, i.e., it is connect respectively with the first pole, the second pole after the two bending.In addition, for the convenience of connection, the
One lug 2212, the second lug 2222 can be electric with the first pole, the second pole respectively by connector (not shown)
Connection.
Electrode assembly 220 has the first side and the second side along the thickness direction Y of secondary cell, can be with the first side and the second side
It is both provided with the first lug 2212 and the second lug 2222；Can also only the first side be provided with the first lug 2212 and the second lug
2222, i.e. the first lug 2212 and the second lug 2222 may be contained within the side of 220 through-thickness Y of electrode assembly.Specifically,
In 220 coiling and molding of electrode assembly, it is that electrode assembly 220 is located at that electrode assembly 220, which has winding initial layers, winding initial layers,
The winding initiating terminal part of the pole piece (can be the first pole piece 221 or the second pole piece 222) of innermost circle, the first lug 2212 or
The second lug of person 2222 can extend from winding initial layers along the side of above-mentioned thickness direction Y, i.e., in each winding layer, only position
Extend lug (such as the first lug 2212 or the second lug 2222) in the part of winding initial layers side, such as Figure 10, Figure 12
It is shown, in this way, it is identical in the first noumenon portion 2211, the second body part 2221 stacking thickness, the first lug 2212
Stacking thickness, the second lug 2222 stacking thickness stretch out the mode of lug compared with whole thickness direction Y and be obviously reduced, first
When lug 2212 and the second lug 2222 are bent, lug (including the first lug 2212 and second for being located inside and outside bending place
Lug 2222) end dislocation can be extenuated, to make 2212 and second lug 2222 of outermost first lug be easy to
Connect with connector, the redundancy of 2212 and second lug 2222 of innermost first lug can also be obviously reduced, reduce by
It is too long in redundancy and when secondary cell is squeezed, the first lug 2212 and the second lug 2222 of redundancy may be inserted into ontology
The risk of secondary cell short circuit is caused inside portion 31.Therefore, the first lug is extended in this side along above-mentioned thickness direction Y
2212 and second lug 2222 mode, when secondary cell assembles, electrode assembly 220 is easily attached with connector, and can
Improve the safety of secondary cell.Wherein, winding initial layers can be the winding initiating terminal part of the first pole piece 221, in the portion
Divide and does not extend out the first lug 2212.
Wherein, the first pole piece 221 can be positive plate, and the second pole piece 222 is negative plate, and correspondingly, the first pole is just
Pole, the second pole are negative terminal；Can also the first pole piece 221 be negative plate, the second pole piece 222 is positive plate, correspondingly, the
One pole is negative terminal, and the second pole is positive terminal.In a kind of embodiment, the material of positive plate is mainly aluminium, the master of negative plate
It is copper to want material.When the second pole piece 222 is positive plate, the second pole piece 222 can be electrically connected with shell 210, in particular by
Head cover is electrically connected with shell 210, so that shell 210 is positively charged, improves the resistance to corrosion of secondary cell.
In the various embodiments described above, insulating part 230 can be diaphragm structure, and electrode assembly 220 is wrapped up by bending, wherein
Insulating part 230 can only wrap up top 224 and the side 226 of electrode assembly 220, and bottom 225 is completely exposed, i.e. electrode assembly
220 bottom 225 is completely exposed to form engraved structure 231, after such setting, in the inside of secondary cell, is electrolysed liquid energy
It is enough preferably to infiltrate to the inside of electrode assembly 220, to improve the electrochemical properties of secondary cell；And this mode is convenient for exhausted
The processing of edge part 230.Certainly, insulating part 230 can also wrap up the part, top 224 and side of the bottom 225 of electrode assembly 230
Portion 226, at this point, engraved structure 231 may include multiple through-holes, the second pole piece 222 stretches out insulating part 230 and shell by through-hole
210 contacts.
It should be noted that although electrode assembly 220 is contacted with shell 210, the two can and non-electric-connecting, the two
Contact main function be for transmitting heat, specifically, the end of the second pole piece 222 can pass through thermal insulation layer and shell
210 contacts.At this point, along the short transverse Z of secondary cell, electrode assembly 220, can be with the first pole piece away from the side of head cover
221 and second pole piece 222 end part aligning, can also end dislocation.
When the first pole piece 221 and the second pole piece 222 are away from the end part aligning of head cover, due to the second pole piece 222 and shell
Body 210 contacts, and therefore, the first pole piece 221 will necessarily be given a discount by the interference of shell 210, and then lead to the first pole piece 221
It contacts and is electrically connected with the second pole piece 222, cause short circuit.In order to avoid the generation of the above problem, in a kind of embodiment, away from top
The side of lid, the second pole piece 222 exceed the first pole piece 221 and isolation film 223, i.e. the first pole piece 221 and the second pole piece 222 are being carried on the back
One end dislocation from head cover, using this structure, can avoid the first pole piece 221 from being given a discount with shell 210 due to contacting, and
There is a certain distance between first pole piece 221 and the second pole piece 222, the probability of the two contact electrical connection is reduced, to improve
The safety of secondary cell.As shown in Fig. 5, Fig. 6, Figure 10, Figure 11, away from the side of head cover, the first pole piece 221 stretches out the
The end of two pole pieces 222 misplaces, and the second pole piece 222 is contacted across engraved structure 231 with shell 210, what electrode assembly 220 generated
Heat is conducted along the second pole piece 222 to shell 210.
Further, away from the side of head cover, isolation film 223 wraps up the first pole piece 221, after such setting, first
Pole piece 221 is isolated film 223 and is wrapped in away from the end of head cover, and the first pole piece 221 is made with the second pole piece 222 to be difficult to connect in the side
It touches, to be better protected from the two since phenomena such as giving a discount is in contact electrical connection, to improve the safety of secondary cell
Isolation film 223 in the both sides of the first pole piece 221 can be linked together by the modes such as being bonded, heating, with packet
The first pole piece 221 is wrapped up in, the isolation of the both sides of the first pole piece 221 can also be connected by bonded adhesives or other insulation connection structures
Film 223.Optionally, it is smoothly connected, that is, is located at same in one end away from head cover positioned at the isolation film 223 of 221 both sides of the first pole piece
The isolation film 223 of the both sides of one first pole piece 221 is an integral structure.As shown in Figure 6.After such setting, secondary cell makes
With in the process, generates heat or vibrated etc. lead during it away from the side of head cover, can avoid due to secondary cell use
It causes the junction of two isolation films 223 to be broken, improves protection reliability of the isolation film 223 to the first pole piece 221, thus into
One step reduces the first pole piece 221 and the risk of short circuit occurs for the second pole piece 222.
In the various embodiments described above, electrode assembly 220 is in producing assembling process, due to the first lug 2212 and the second lug
2222 stretch out the first noumenon portion 2211, the second body part 2221, therefore, adjacent two the first lugs 2212 or adjacent two
Certain spacing distance is had between a second lug 2222, as shown in Figure 10.In electrode assembly 220 and connector or pole
When (such as the first pole and the second pole) connects, multiple first lugs 2212 start in itself and the junction in the first noumenon portion 2211
Fitting stacking, multiple second lugs 2222 start to be bonded stacking at it with the junction of the second body part 2221, due to by each
Locate the effect of folding s tress, the first lug 2212 its junction with the first noumenon portion 2211, the second lug 2222 its with
Fracture and breakage may occur for the junction of the second body part 2221, especially when the first lug 2212 and the second lug 2222 are only set
When being placed in the first side of electrode assembly 220, the first lug 2212 of fracture distress is easily across isolation film 223 and the second body part
2221 contact electrical connections, the second lug 2222 of fracture distress easily contact electricity across isolation film 223 and the first noumenon portion 2211
Connection causes secondary cell short-circuit, or even causes safety accident.To solve the above-mentioned problems, the application is close to the one of head cover
Side, isolation film 223 wrap up the first pole piece 221 or the second pole piece 222, and the end of the first lug 2212 and the second lug 2222
Isolation film 223 is exposed, in order to which the first lug 2212, the second lug 2222 are connect with connector or pole.So set
After setting, wrapped up since the second body part 2221 between two neighboring first lug 2212 is isolated film 223, Huo Zhewei
The first noumenon portion 2211 between two neighboring second lug 2222 is isolated the package of film 223, therefore, even if the first lug
2212 occur in itself and the junction in the first noumenon portion 2211, the second lug 2222 in itself and the junction of the second body part 2221
Fracture and breakage, the first lug 2212, the second lug 2222 of fracture also are difficult to touch the second body part adjacent thereto
2221, the first noumenon portion 2211 occurs the risk of short circuit to reduce the first pole piece 221 and the second pole piece 222, improves two
The safety of primary cell.
Particularly, as shown in Figure 12 and Figure 13, if the first lug 2212 is damaged compared with the second lug 2222 easy fracture, in order into
One step improves the safety of secondary cell, optionally, in electrode assembly 220 close to the side of head cover, the package of isolation film 223 second
The isolation film 223 of pole piece 222, i.e., same second pole piece, 222 both sides is connected with each other, to wrap up the second pole piece 222 close to head cover
End, in this way, even if fracture distress occurs for the first lug 2212, it is also difficult to it is contacted with the second pole piece 222, it is secondary to improve
The safety of battery.
Each isolation film 223 can link together close to the end of head cover, can also link together two-by-two or one
Divide and link together two-by-two, rest part links together.
In a kind of embodiment, at the first lug 2212, the first pole piece 221 is leaned on beyond isolation film 223 and the second pole piece 222
The side of nearly head cover can exceed isolation film 223 close to the side of head cover, at this point, being located at same second pole with the first lug 2212
The isolation film 223 of 222 both sides of piece close to head cover one end be connected with each other, to wrap up the second pole piece 222, i.e., in the first side, respectively every
It is connected two-by-two from film 223, as shown in Figure 12 and Figure 13, in this way, near the first lug 2212, the second pole piece 222 is close to head cover
To be isolated film 223 fully wrapped around for end, even if fracture occurs for the first lug 2212 (with reference to 14 institute of figure being bonded the when of being laminated
Show), it is wrapped up since the end of the second pole piece 222 is isolated film 223, the first lug 2212 of fracture is also only capable of touching
Isolation film 223 occurs the risk of short circuit to reduce the first pole piece 221 and the second pole piece 222, improves the peace of secondary cell
Quan Xing.Due at the first lug 2212, in order to ensure the area of passage of electrode assembly 220 and the first pole junction, first
The end of lug 2212 needs to expose the larger area of isolation film 223, if each isolation film 223 is homogeneous close to the end of head cover
Interconnection is connected together, then, is needed on the isolation film 223 being connected at each first lug 2212 for each the first lug 2212
Be separately provided perforation, and using it is this isolation film 223 is connected two-by-two by the way of, can avoid independent at the first lug 2212
Setting perforation improves the efficiency of assembling of secondary cell to simplify assembly process.It correspondingly, can be at the second lug 2222
Also using two isolation films 223 of same first pole piece, 221 both sides link together, at this point, being needed at the second lug 2222
Perforation is separately provided, so that the second lug 2222 passes through.Certainly, at the second lug 2222, same first can also be located at
Two isolation films 223 of 221 both sides of pole piece link together, to wrap up the end of the first pole piece 221.Obviously, this to connect two-by-two
The mode connect is suitable for the first side and the second side is respectively provided with the electrode assembly 220 of the first lug 2212 and the second lug 2222,
The electrode assembly 220 of first lug 2212 and the second lug 2222 is set suitable for only the first side.
In another embodiment, when the first lug 2212 and the second lug 2222 are only arranged at the first of electrode assembly 220
When side, in the second side, each first pole piece 221 and each second pole piece 222 are not provided with lug, and each isolation film 223 is close to head cover
One end links together, as shown in figure 13, to wrap up each first pole piece 221, i.e., in the second side, the end phase of each isolation film 223
It connects, to form multiple clearance spaces, the first pole piece 221 is located in each clearance space, and this mode can be primary
Property links together each isolation film 223, therefore, it is possible to improve the efficiency of assembling of electrode assembly 220.That is, only
Side is arranged the first lug 2212 and when the second lug 2222, and the isolation film 223 in the first side connects two-by-two, the second side every
It can mutually link together from film 223.This mode can improve the efficiency of assembling of secondary cell.Certainly, in the second side
Isolation film 223 can also be connected with each other by the way of connecting two-by-two.
Certainly, close to the side of head cover, isolation film 223 can also wrap up the first pole piece 221.
In the various embodiments described above, no matter close to the side of head cover, or away from the side of head cover, interconnection every
It can be connected by hot melting way or bonding way from film 223, in order to operate.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of secondary cell, which is characterized in that including：
Shell is provided with opening；
Head cover closes with the case lid, and seals the opening；
Electrode assembly is set in the shell, and the electrode assembly includes the first pole piece, the second pole piece and is set to described the
Isolation film between one pole piece and second pole piece, wherein the first pole piece is positive plate；With
Insulating part is wrapped in the outside of the electrode assembly；
The insulating part is provided with engraved structure away from the side of the head cover；Away from the side of the head cover, described first
Pole piece stretches out the engraved structure and is contacted with the shell.
2. secondary cell according to claim 1, which is characterized in that away from the side of the head cover, second pole
Piece exceeds first pole piece and the isolation film, and second pole piece stretches out the engraved structure and contacted with the shell.
3. secondary cell according to claim 2, which is characterized in that away from the side of the head cover, the isolation film
Wrap up first pole piece.
4. secondary cell according to claim 3, which is characterized in that be located at the isolation film of first pole piece both sides
It is smoothly connected away from one end of the head cover.
5. secondary cell according to claim 1, which is characterized in that the bottom of the electrode assembly exposes described completely
Engraved structure.
6. according to claim 1-5 any one of them secondary cells, which is characterized in that first pole piece includes the first noumenon
Portion and the first lug extended from the first noumenon portion；Second pole piece includes the second body part and from second ontology
The second lug that portion extends；First lug is set to the electrode assembly close to the one of the head cover with second lug
Side；
Close to the side of the head cover, the isolation film wraps up first pole piece or second pole piece, and described the
The end of one lug and second lug exposes the isolation film.
7. secondary cell according to claim 6, which is characterized in that at first lug, first pole piece is super
Go out the isolation film and second pole piece close to the side of the head cover, be located at same second pole piece both sides it is described every
It is connected with each other close to one end of the head cover from film, to wrap up second pole piece.
8. secondary cell according to claim 6, which is characterized in that thickness of the electrode assembly along the secondary cell
Direction has the first side and the second side；First lug and second lug may be contained within first side.
9. secondary cell according to claim 8, which is characterized in that in the second side, each isolation film is close to institute
The one end for stating head cover links together, to wrap up each first pole piece.
10. secondary cell according to claim 6, which is characterized in that the isolation film of interconnection passes through hot melt side
Formula or bonding way connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820598920.1U CN208062214U (en) | 2018-04-25 | 2018-04-25 | Secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820598920.1U CN208062214U (en) | 2018-04-25 | 2018-04-25 | Secondary cell |
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| Publication Number | Publication Date |
|---|---|
| CN208062214U true CN208062214U (en) | 2018-11-06 |
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| CN201820598920.1U Active CN208062214U (en) | 2018-04-25 | 2018-04-25 | Secondary cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310574A (en) * | 2020-09-30 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Cylindrical battery cell, battery, electric device, manufacturing method and manufacturing system |
| CN114094162A (en) * | 2021-07-06 | 2022-02-25 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| WO2024040386A1 (en) * | 2022-08-22 | 2024-02-29 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical device |
-
2018
- 2018-04-25 CN CN201820598920.1U patent/CN208062214U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310574A (en) * | 2020-09-30 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Cylindrical battery cell, battery, electric device, manufacturing method and manufacturing system |
| CN114094162A (en) * | 2021-07-06 | 2022-02-25 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| CN114094162B (en) * | 2021-07-06 | 2024-06-07 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric equipment and manufacturing method and equipment of battery cell |
| WO2024040386A1 (en) * | 2022-08-22 | 2024-02-29 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical device |
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