CN209183613U - Secondary cell and battery modules - Google Patents
Secondary cell and battery modules Download PDFInfo
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- CN209183613U CN209183613U CN201822267678.2U CN201822267678U CN209183613U CN 209183613 U CN209183613 U CN 209183613U CN 201822267678 U CN201822267678 U CN 201822267678U CN 209183613 U CN209183613 U CN 209183613U
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- rupture disk
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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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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides a kind of secondary cell and battery modules.Battery modules include multiple secondary cells being arranged successively.Secondary cell includes electrode assembly, shell and cap assembly.Shell has accommodating chamber, and electrode assembly is contained in accommodating chamber.Electrode assembly includes multiple electrodes unit, axially stacked setting of the multiple electrode unit along accommodating chamber.Cap assembly includes lamina tecti and explosion rupture disk, and lamina tecti is connected to shell and is located at electrode assembly along axial side.Lamina tecti is equipped with through-hole, and explosion rupture disk is connected to lamina tecti and covers through-hole.Lamina tecti has the first inner surface in the side close to electrode assembly, and explosion rupture disk has the second inner surface in the side close to electrode assembly, and the first inner surface is at a distance from electrode assembly less than the second inner surface at a distance from electrode assembly.In battery modules, the orientation of the multiple secondary cell is perpendicular to axial direction.
Description
Technical field
The utility model relates to field of batteries more particularly to a kind of secondary cell and battery modules.
Background technique
Battery modules generally include multiple secondary cells being arranged successively, and electrode assembly is equipped with inside each secondary cell.
In charge and discharge process, electrode assembly can expand in the orientation of secondary cell, and the electrode of the multiple secondary cell
The expansive force that component generates can be superimposed along orientation and form excessive resultant force；The resultant force squeezes secondary cell, causes
Secondary cell can not work normally, and influence the service life of secondary cell.
Utility model content
In view of the problems in the background art, the purpose of this utility model is to provide a kind of secondary cells and battery mould
Group is avoided that explosion rupture disk ruptures, improves performance and the service life of secondary cell.
To achieve the goals above, the utility model provides a kind of secondary cell and battery modules.
Secondary cell includes electrode assembly, shell and cap assembly.Shell has accommodating chamber, and accommodating chamber, which has, to be opened
Mouthful, electrode assembly is contained in accommodating chamber.Electrode assembly includes multiple electrodes unit, and the multiple electrode unit is along accommodating chamber
Axially stacked setting.Cap assembly includes lamina tecti and explosion rupture disk, and lamina tecti is connected to shell and is located at electrode assembly along axis
To side.Lamina tecti is equipped with through-hole, and explosion rupture disk is connected to lamina tecti and covers through-hole.Lamina tecti is close to the one of electrode assembly
Side has the first inner surface, and explosion rupture disk has the second inner surface in the side close to electrode assembly, and the second inner surface is located at first
Side of the inner surface far from electrode assembly.
Lamina tecti is additionally provided with the first groove, and the first groove extends from the first inner surface along the direction far from electrode assembly, and
First groove is arranged along the circumference of through-hole.Explosion rupture disk is set to the first groove, and the depth of the first groove is greater than the thickness of explosion rupture disk
Degree.
Lamina tecti is additionally provided with the second groove, and the second groove extends from the first inner surface along the direction far from electrode assembly, and
Second groove is arranged along the circumference of the first groove.The depth of first groove is greater than the depth of the second groove.
The depth of second groove is 0.2mm~0.8mm.
First groove and the second groove form step surface, and step surface is flushed with the second inner surface.
Lamina tecti is additionally provided with third groove, and third groove is set to the side of the separate electrode assembly of lamina tecti, and third
Groove is arranged along the circumference of through-hole；Explosion rupture disk is set to third groove.
Cap assembly further includes insulating component, is set to the side of the close electrode assembly of lamina tecti and is connected to top cover
Plate.There are gaps between explosion rupture disk and insulating component.
Insulating component close to electrode assembly side have third inner surface, and the flatness of third inner surface be less than or
Equal to 0.5mm.
Electrode unit includes the first pole piece, the second pole piece and the diaphragm that winding is integrated, and has wide face and leptoprosopy.Wide face
It is oppositely arranged down vertically with the first inner surface, the second inner surface, leptoprosopy is connected with wide face and is located at electrode unit along width
The both ends in direction.
Battery modules include the secondary cell；Secondary cell is multiple and is arranged successively, and the multiple secondary electricity
The orientation in pond is perpendicular to axial direction.
The beneficial effects of the utility model are as follows: in this application, the multiple electrodes unit in secondary cell is along axial cloth
It sets, therefore the expansive force of the multiple electrode unit can be superimposed in the axial direction.In battery modules, the multiple secondary cell
Orientation is perpendicular to axial direction, therefore, even if swell increment of all electrode assemblies in orientation is superimposed, also not
The excessive resultant force of meeting output guarantees performance and the service life of secondary cell so that secondary cell be avoided to be subject to crushing.It is opposite by being arranged
In the second inner surface of the first inner surface recess, when electrode unit expansion, the application can reduce explosion rupture disk in normal barometric pressure
The probability of lower rupture reduces security risk, extends the service life of secondary cell.
Detailed description of the invention
Fig. 1 is the exploded view according to an embodiment of the secondary cell of the utility model.
Fig. 2 is the cross-sectional view according to the secondary cell of the utility model.
Fig. 3 is the schematic diagram of the electrode unit of Fig. 1.
Fig. 4 is the exploded view of the cap assembly of the secondary cell of Fig. 1.
Fig. 5 is the enlarged drawing of the Blocked portion of Fig. 2.
Fig. 6 is the schematic diagram of the lamina tecti of Fig. 5.
Fig. 7 is the schematic diagram according to another embodiment of the secondary cell of the utility model.
Fig. 8 is the schematic diagram according to the another embodiment of the secondary cell of the utility model.
Fig. 9 is the schematic diagram of the cap assembly of the secondary cell of Fig. 8.
Wherein, the reference numerals are as follows:
1 electrode assembly, 315 third groove
11 electrode unit, 32 explosion rupture disk
111 first pole piece, 321 second inner surface
112 second pole piece, 33 insulating component
113 diaphragm, 331 third inner surface
2 shell, 34 electrode terminal
21 accommodating chamber, 35 screening glass
3 cap assembly, 4 afflux component
31 faces lamina tecti S1 wide
311 through-hole S2 leptoprosopy
312 first inner surface X length directions
313 first groove Y thickness directions
314 second groove Z axis to
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
In the description of the present application unless specifically defined or limited otherwise, term " first ", " second ", " third " are only
For descriptive purposes, it is not understood to indicate or imply relative importance；Term " multiple " refers to two or more；
Unless otherwise prescribed or illustrate, term " connection ", " fixation " etc. shall be understood in a broad sense, for example, " connection " can be fixed company
It connects, may be a detachable connection, or be integrally connected, or electrical connection or signal connection；" connection " can be directly connected,
It can also be indirectly connected through an intermediary.For the ordinary skill in the art, can understand as the case may be
The concrete meaning of above-mentioned term in this application.
In the description of this specification, it is to be understood that the nouns of locality such as "upper", "lower" described in the embodiment of the present application are
With angle shown in the drawings come what is be described, the restriction to the embodiment of the present application should not be construed as.
In this application, battery modules generally include secondary cell, end plate, side plate and busbar connector.Secondary cell is multiple
And it is arranged successively.The secondary cell of the application can be prismatic lithium ion battery.The orientation of the multiple secondary cell
The width direction Y of each secondary cell can be parallel to.End plate is two and is respectively arranged at the multiple secondary cell along arrangement side
To both ends, side plate is two and is respectively arranged at the two sides of the multiple secondary cell, end plate together with plate-side plate welding simultaneously
Form the frame of rectangle.The multiple secondary cell is fixed on the frame.Busbar connector connects the multiple secondary cell,
Mode in parallel or series-parallel links together.
Referring to Figures 1 and 2, the secondary cell of the application includes electrode assembly 1, shell 2, cap assembly 3 and afflux component
4。
Accommodating chamber 21 is formed with inside shell 2, to accommodate electrode assembly 1 and electrolyte.Shell 2 is along one end of axial Z
Opening is formed, and electrode assembly 1 can be placed into shell 2 via the opening.Shell 2 can be by conductive metals such as aluminum or aluminum alloy
Material be made.Axial Z and the extending direction of accommodating chamber 21 are parallel and perpendicular to the plane where opening.The battery of the application
Mould group can be used for electric car, and when the cap assembly 3 of the secondary cell on electric car and ground are substantially parallel, axial Z is flat
Row is in the short transverse of secondary cell, perpendicular to the width direction Y of secondary cell, length direction X and multiple secondary cells
Orientation.
Electrode assembly 1 includes multiple electrodes unit 11, and the multiple electrode unit 11 is laminated along the axial Z of accommodating chamber 21
Setting.Referring to Fig. 3, each electrode unit 11 includes the first pole piece 111, the second pole piece 112 and diaphragm 113, and diaphragm 113 is by the first pole
Piece 111 and the second pole piece 112 separate.Electrode unit 11 can by be helically wrapped the first pole piece 111, the second pole piece 112 and every
Film 113 and formed, and electrode unit 11 presses to form flat structure by pressure.Alternatively, each electrode unit 11 can also
To be formed by the stacking of the first pole piece 111, the second pole piece 112 and diaphragm 113.
First pole piece 111 includes aluminium foil and the positive electrode active materials coated on aluminium foil surface, the positive electrode active materials packet
Include LiMn2O4 or LiFePO4.Second pole piece 112 includes copper foil and the negative electrode active material coated on copper foil surface, the cathode
Active material includes graphite or silicon.
Cap assembly 3 includes lamina tecti 31, explosion rupture disk 32, insulating component 33 and electrode terminal 34.
Lamina tecti 31 is connected to shell 2 and covers the opening of shell 2, so that electrode assembly 1 to be enclosed in the receiving of shell 2
In chamber 21.Insulating component 33 is set to the side of the close electrode assembly 1 of lamina tecti 31, that is to say, that insulating component 33 is set
It is placed between lamina tecti 31 and electrode assembly 1；Insulating component 33 can be by hot-melt adhesive paste in lamina tecti 31.Electrode terminal 34 is arranged
In lamina tecti 31 and it is projected into the outside of lamina tecti 31.Electrode terminal 34 and afflux component 4 are two, an afflux component 4
Connect the first pole piece 111 and an electrode terminal 34, the second pole piece of another afflux component 4 connection 112 and another electrode tip
Son 34.
In charge and discharge process, each electrode unit 11 will appear expansion.In this application, the multiple electrodes in secondary cell
Unit 11 is arranged along axial Z, therefore the expansion of the multiple electrode unit 11 can be superimposed on axial Z.And in width direction Y
On, the expansion of the multiple electrode unit 11 is smaller, so the whole swell increment in width direction Y of electrode assembly 1 is smaller, it is corresponding
Ground, the expansive force that electrode assembly 1 acts on shell 2 are also smaller.
In battery modules, the orientation of the multiple secondary cell is perpendicular to axial Z, therefore, even if all electricity
Swell increment of the pole component 1 in orientation is superimposed, will not the excessive resultant force of output, to avoid secondary cell quilt
It damages by pressure, guarantees performance and the service life of secondary cell.
In addition, in known technology, two end plates of battery modules need to clamp the multiple secondary cell, if secondary
The resultant force that cell expansion generates is excessive, and the weld that may result in end plate and side plate is broken, and battery modules is caused to fail.And
In the application, the resultant force that the multiple secondary cell generates during expansion is smaller, so that battery modules be avoided to fail.
Lamina tecti 31 is located at electrode assembly 1 along the side of axial Z, that is to say, that lamina tecti 31 is located at the multiple electrode
Unit 11 is along one end of orientation.Lamina tecti 31 is equipped with through-hole 311, and through-hole 311 can be located at the X along its length of lamina tecti 31
Central region.Lamina tecti 31 has the first inner surface 312 in the side close to electrode assembly 1, and the first inner surface 312 can be for substantially
Perpendicular to the plane of axial Z.
Explosion rupture disk 32 is connected to lamina tecti 31 and covers through-hole 311.Explosion rupture disk 32 has in the side close to electrode assembly 1
Second inner surface 321, the second inner surface 321 are in substantially parallel relationship to the first inner surface 312.
Explosion rupture disk 32 has indentation.When short circuit occurs in secondary cell, electrode assembly 1 generates a large amount of gas, and gas can
To break through explosion rupture disk 32, so that the outside for the secondary cell being discharged in time, avoids exploding, security risk is reduced.
Referring to Fig. 2 and Fig. 5, in the secondary battery, when electrode unit 11 expands, the swell increment meeting of multiple electrodes unit 11
It is superimposed on axial Z, so as to cause (the i.e. electrode unit near insulating component 33 for electrode assembly 1 of electrode unit 11
11) extruding insulation component 33.Expansive force is transmitted to the first inner surface 312 of lamina tecti 31 by insulating component 33, leads to lamina tecti
31 deformations.In known technology, explosion rupture disk 32 is set to the downside of lamina tecti 31 mostly；When electrode unit 11 expands, insulation
Component 33 can squeeze explosion rupture disk 32；And since 32 intensity of explosion rupture disk is smaller, so being easy to rupture under the effect of the pressure, cause
Security risk causes secondary cell to fail.
It is therefore preferred that the second inner surface 321 is located at one of the first inner surface 312 far from electrode assembly 1 referring to Fig. 5
Side, that is to say, that the first inner surface 312 and 1 distance d2 of electrode assembly less than the second inner surface 321 and electrode assembly 1 away from
From d1.In this application, the second inner surface 321 is recessed relative to the first inner surface 312, therefore, when electrode unit 11 expands,
First inner surface 312 can avoid insulating component 33 from directly squeezing explosion rupture disk 32 with blocking electrode unit 11 and insulating component 33, from
And explosion rupture disk 32 is avoided to rupture under normal barometric pressure, security risk is reduced, the service life of secondary cell is extended.
Insulating component 33 is equipped with multiple air holes in the downside of explosion rupture disk 32.When secondary cell short circuit, gas can be through
It is acted in explosion rupture disk 32 by air hole, to break through explosion rupture disk 32 and be discharged to outside secondary cell.
Referring to figure 5 and figure 6, lamina tecti 31 is additionally provided with the first groove 313, and the first groove 313 is from the first inner surface 312 along remote
Direction from electrode assembly 1 extends, and the first groove 313 is arranged along the circumference of through-hole 311.First groove 313 is annular.It is explosion-proof
Piece 32 is set to the first groove 313, is greater than the thickness of explosion rupture disk 32 along axial Z, the depth t1 of the first groove 313.Explosion rupture disk 32
Surface far from electrode assembly 1 fits in the annular bottom wall of the first groove 313.The circumference of explosion rupture disk 32 is solderable to be connected to the first groove
313 side wall.
In this application, by the way that the first groove 313 is arranged, the value of d1 can be made to be greater than the value of d2, to avoid explosion rupture disk
32 rupture under the expansion of electrode assembly 1.
Preferably, lamina tecti 31 is additionally provided with the second groove 314, and the second groove 314 is from the first inner surface 312 along far from electrode
The direction of component 1 extends, and the second groove 314 is arranged along the circumference of the first groove 313.Second groove 314 is annular, and second
The side wall of groove 314 is greater than the side wall and central axis distance d3 of the first groove 313 with central axis distance d4.
The depth t1 of first groove 313 is greater than the depth t2 of the second groove 314.By the way that the first groove 313 and second is arranged
Groove 314 forms step structure on lamina tecti 31.When assembling lamina tecti 31 and explosion rupture disk 32, first explosion rupture disk 32 can be put
Enter the first groove 313, and be bonded explosion rupture disk 32 and the bottom wall of the first groove 313, then by the side wall of the first groove 313 and anti-
Weld together for quick-fried 32.The application and by setting the second groove 314, can be by the side wall and explosion rupture disk of the first groove 313
32 intersection exposes, and therefore, laser can act directly on the intersection, to simplify welding procedure, improves welding essence
Degree.
When electrode unit 11 expands, insulating component 33 deforms under the action of expansive force；Insulating component 33 can when deforming
It can protrude into the second groove 314, if the depth of the second groove 314 is too small, insulating component 33 still may press into explosion rupture disk
32, cause explosion rupture disk 32 to rupture, it is therefore preferred that the depth of the second groove 314 is not less than 0.2mm.
If the depth of the second groove 314 is excessive, lamina tecti 31 just needs to have biggish thickness；And the thickness of lamina tecti 31
Degree is bigger, and intensity is also bigger.When electrode unit 11 expands, lamina tecti 31 can apply biggish anti-work to electrode unit 11
Firmly, the reaction force can reduce the gap between the first pole piece 111 and the second pole piece 112, and electrolyte is caused to cannot be introduced into
Electrode unit 11 causes analysis lithium problem.It is therefore preferred that the depth of the second groove 314 is not more than 0.8mm.In conclusion the
The depth of two grooves 314 is preferably 0.2mm~0.8mm.
First groove 313 and the second groove 314 form step surface (i.e. the annular bottom wall of the second groove 314), step surface with
Second inner surface 321 flushes, it is mentioned here flush be not it is proper flush, allow for error.Work as step
When face is flushed with the second inner surface 321, laser can act directly on the intersection of step surface and the second inner surface 321, thus
Simplify welding procedure, improves welding precision.
When electrode unit 11 expands, insulating component 33 deforms under the action of expansive force；If insulating component 33 and anti-
Quick-fried 32 second inner surface 321 contact, insulating component 33 are easy to crush explosion rupture disk 32.It is therefore preferred that explosion rupture disk 32 with
There are the first gaps between insulating component 33.
Further, there are the second gaps between insulating component 33 and the first inner surface 312.And by between setting second
Gap can limit the deformation of insulating component 33, to have the function that buffering to avoid lamina tecti 31.That is, described second
Gap can reduce the expansive force for being transmitted to lamina tecti 31 by absorbing the swell increment of electrode assembly 1, to reduce lamina tecti
31 deformation improves the appearance and performance of secondary cell.Meanwhile by be arranged the second gap can also increase insulating component 33 with
The spacing of explosion rupture disk 32, so that explosion rupture disk 32 be avoided to be crushed.
Insulating component 33 has third inner surface 331 in the side close to electrode assembly 1, and third inner surface 331 is plane.
In the secondary battery, when electrode unit 11 expands, the swell increment of multiple electrodes unit 11 can be superimposed on axial Z, to lead
It sends a telegraph pole unit 11 to contact with the third inner surface 331 of insulating component 33, or even squeezes third inner surface 331.If in third
Surface 331 is uneven, then the active force that third inner surface 331 is applied on electrode unit 11 is also uneven, so as to cause
11 local deformation of electrode unit is serious, and the pole piece of electrode unit 11 is caused to be broken, and causes security risk.And in this application, institute
Stating third inner surface 331 is plane, therefore, when electrode unit 11 expands, can deform unevenness to avoid electrode unit 11, prevent
Pole piece fracture, improves security performance.For the uniformity for guaranteeing the deformation of electrode unit 11, the flatness of third inner surface 331 is less than
Or it is equal to 0.5mm.
Referring to Fig. 3, electrode unit 11 forms flat structure by winding, and periphery forms wide face S1 and leptoprosopy S2.It is wide
Face S1 is two and is located at electrode unit 11 along the both ends of axial Z, and leptoprosopy S2 is two and is located at electrode unit 11
The both ends of Y in the width direction.Each leptoprosopy S2 is arc and connects face S1 two wide.
Wide face S1 is oppositely arranged with the first inner surface 312, the second inner surface 321, third inner surface 331 along axial Z or more.
Before the expansion of electrode unit 11, wide face S1 is approximately parallel to the first inner surface 312, the second inner surface 321 and third inner surface
331.Wide face S has biggish area, and when electrode unit 11 expands, wide face S1 relative to each other and third inner surface 331 are more
Be easy uniformly in contact with, meanwhile, expansive force can also be delivered evenly to the first inner surface 312.
In the secondary battery, the multiple electrode unit 11 is directly laminated along axial Z.The two neighboring electrode unit 11
It contacts with each other via respective width face S1.
Cap assembly 3 further includes screening glass 35, and screening glass 35 is welded in the outside of lamina tecti 31 and covers through-hole 311.It protects
Bluff piece 35 can destroy explosion rupture disk 32 to avoid external impurity.
The second embodiment of the secondary cell of the application is illustrated below.To simplify the description, only main below to be situated between
The difference of the second embodiment that continues and first embodiment, the part not described are referred to first embodiment and are understood.
Referring to Fig. 7, compared with first embodiment, the second groove 314 in second embodiment is omitted.In second embodiment
In, omitting the second groove 314 can simplify the moulding process of lamina tecti 11.But in a second embodiment, due to the second groove
314 omit, so welding when, laser is highly susceptible to the blocking of the side wall of the first groove 313, to laser inject angle and
Required precision is higher, is unfavorable for industrialized production.When deviation occurs in the angle of laser, laser is easy to act on the first inner surface
312, and weldering print is formed in the first inner surface 312, weldering print is easy to puncture insulating component 33, causes security risk.
Referring to Fig. 8 and Fig. 9, compared with first embodiment, 3rd embodiment can be omitted the first groove 313 and the second groove
314。
Specifically, lamina tecti 31 is equipped with third groove 315, and third groove 315 is set to the separate electrode group of lamina tecti 31
The side of part 1, and third groove 315 is arranged along the circumference of through-hole 311.Third groove 315 is annular.Explosion rupture disk 32 is set to
Three grooves 315.
In the third embodiment, explosion rupture disk 32 is set to the outside of lamina tecti 31, so explosion rupture disk 32 and insulating component 33
Between have biggish distance；When electrode unit 11 expands, explosion rupture disk 32 is not easy to be crushed.
Meanwhile by the way that third groove 315 is arranged, it can reduce the space occupied on axial Z of explosion rupture disk 32, avoid explosion-proof
The whole height of the increase secondary cell of piece 32.
Claims (10)
1. a kind of secondary cell, which is characterized in that including electrode assembly (1), shell (2) and cap assembly (3)；
Shell (2) has accommodating chamber (21), and accommodating chamber (21) has opening, and electrode assembly (1) is contained in accommodating chamber
(21)；
Electrode assembly (1) includes multiple electrodes unit (11), axial direction of the multiple electrode unit (11) along accommodating chamber (21)
(Z) it is stacked；
Cap assembly (3) includes lamina tecti (31) and explosion rupture disk (32), and lamina tecti (31) is connected to shell (2) and is located at electrode group
Part (1) is along the side of axial direction (Z)；
Lamina tecti (31) is equipped with through-hole (311), and explosion rupture disk (32) is connected to lamina tecti (31) and covers through-hole (311)；
Lamina tecti (31) has the first inner surface (312) in the side close to electrode assembly (1), and explosion rupture disk (32) is close to electrode
The side of component (1) has the second inner surface (321), and the second inner surface (321) is located at the first inner surface (312) far from electrode group
The side of part (1).
2. secondary cell according to claim 1, which is characterized in that
Lamina tecti (31) is additionally provided with the first groove (313), and the first groove (313) is from the first inner surface (312) along far from electrode group
The direction of part (1) extends, and the first groove (313) is arranged along the circumference of through-hole (311)；
Explosion rupture disk (32) is set to the first groove (313), and the depth of the first groove (313) is greater than the thickness of explosion rupture disk (32).
3. secondary cell according to claim 2, which is characterized in that
Lamina tecti (31) is additionally provided with the second groove (314), and the second groove (314) is from the first inner surface (312) along far from electrode group
The direction of part (1) extends, and the second groove (314) is arranged along the circumference of the first groove (313)；
The depth of first groove (313) is greater than the depth of the second groove (314).
4. secondary cell according to claim 3, which is characterized in that the depth of the second groove (314) be 0.2mm~
0.8mm。
5. secondary cell according to claim 4, which is characterized in that the first groove (313) and the second groove (314) are formed
Step surface, step surface are flushed with the second inner surface (321).
6. secondary cell according to claim 1, which is characterized in that
Lamina tecti (31) is additionally provided with third groove (315), and third groove (315) is set to the separate electrode assembly of lamina tecti (31)
(1) side, and third groove (315) is arranged along the circumference of through-hole (311)；Explosion rupture disk (32) is set to third groove (315).
7. secondary cell according to claim 1, which is characterized in that
Cap assembly (3) further includes insulating component (33), is set to the side of the close electrode assembly (1) of lamina tecti (31) and company
It is connected to lamina tecti (31)；
There are gaps between explosion rupture disk (32) and insulating component (33).
8. secondary cell according to claim 7, which is characterized in that insulating component (33) is close to electrode assembly (1)
Side has third inner surface (331), and the flatness of third inner surface (331) is less than or equal to 0.5mm.
9. secondary cell according to claim 1-8, which is characterized in that
Electrode unit (11) includes the first pole piece (111), the second pole piece (112) and the diaphragm (113) that winding is integrated, and is had
Wide face (S1) and leptoprosopy (S2)；
Wide face (S1) and the first inner surface (312), the second inner surface (321) are oppositely arranged up and down along axial direction (Z), leptoprosopy (S2) with
Wide face (S1) is connected and is located at the both ends of electrode unit (11) (Y) in the width direction.
10. a kind of battery modules, which is characterized in that including secondary cell of any of claims 1-9；
Secondary cell is multiple and is arranged successively, and the orientation of the multiple secondary cell is perpendicular to axial direction (Z).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822267678.2U CN209183613U (en) | 2018-12-29 | 2018-12-29 | Secondary cell and battery modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822267678.2U CN209183613U (en) | 2018-12-29 | 2018-12-29 | Secondary cell and battery modules |
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| Publication Number | Publication Date |
|---|---|
| CN209183613U true CN209183613U (en) | 2019-07-30 |
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| CN201822267678.2U Active CN209183613U (en) | 2018-12-29 | 2018-12-29 | Secondary cell and battery modules |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029489A (en) * | 2019-08-14 | 2020-04-17 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| WO2020133662A1 (en) * | 2018-12-29 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| EP3907816A4 (en) * | 2019-08-14 | 2022-03-30 | Contemporary Amperex Technology Co., Limited | Secondary battery |
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2018
- 2018-12-29 CN CN201822267678.2U patent/CN209183613U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020133662A1 (en) * | 2018-12-29 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN111384348A (en) * | 2018-12-29 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN111384348B (en) * | 2018-12-29 | 2024-09-13 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN111029489A (en) * | 2019-08-14 | 2020-04-17 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| WO2021027778A1 (en) * | 2019-08-14 | 2021-02-18 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| EP3907816A4 (en) * | 2019-08-14 | 2022-03-30 | Contemporary Amperex Technology Co., Limited | Secondary battery |
| EP3907773A4 (en) * | 2019-08-14 | 2022-04-13 | Contemporary Amperex Technology Co., Limited | Secondary battery |
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