CN208173640U - Lamina tecti and secondary cell - Google Patents
Lamina tecti and secondary cell Download PDFInfo
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- CN208173640U CN208173640U CN201820413312.9U CN201820413312U CN208173640U CN 208173640 U CN208173640 U CN 208173640U CN 201820413312 U CN201820413312 U CN 201820413312U CN 208173640 U CN208173640 U CN 208173640U
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- joint face
- lamina tecti
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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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Abstract
The utility model relates to a kind of lamina tecti and secondary cells.Lamina tecti includes two ends being oppositely arranged in the longitudinal direction, and at least one of two ends include sealed connection portion, wherein sealed connection portion includes the first joint face and the second joint face, and the first joint face and the second joint face extend along short transverse；First joint face intersects with the second joint face and forms pointed structures.The lamina tecti of the utility model guarantees to realize good sealing effect between shell and lamina tecti by the way that sealed connection portion for being hermetically connected with the shell is arranged in end, reduces when the end outer surface of shell and lamina tecti is tightly connected and a possibility that seal failure situation occurs.
Description
Technical field
The utility model relates to technical field of secondary batteriess, more particularly to a kind of lamina tecti and secondary cell.
Background technique
With the extensive use of new-energy automobile, people require the energy density of secondary cell higher and higher.Current two
Primary cell mainly includes shell and the electrode assembly that is set in shell.Currently, installing the mode of electrode assembly in shell
There are two types of, one is hard shell is first made, then lamina tecti and electrode assembly are integrally inserted into hard shell, it finally will top
Cover board and hard shell welded seal；Another kind is that soft outer is stamped out pit, and then electrode assembly is put into pit,
Finally pit is sealed again.The wall thickness needs of former mode, hard shell are made thicker with proof strength, otherwise hard shell
Open end be easily deformed so that lamina tecti and electrode assembly are difficult to be inserted into hard shell, however the wall thickness of hard shell is done
It obtains thicker and secondary energy density can be reduced；Latter approach, pit is limited by Sheet Metal Forming Technology can not be made too deep, because
This thickness for being put into the electrode assembly in pit can only be made relatively thin, this is unfavorable for the raising of secondary cell energy density.
To solve the above-mentioned problems, it can be used and be in advance completed electrode assembly and lamina tecti, then outside electrode assembly
Electrode assembly wraps up using shell blank in portion and lamina tecti mode carrys out secondary cell for assembling.Electrode assembly is wrapped up using shell blank
Mode when processing shell, the shell of formation can have seam.The seam of shell and the end of lamina tecti exist when being sealed
Leakproofness is poor, is easy to the case where seal failure occur.
Utility model content
The utility model embodiment provides a kind of lamina tecti and secondary cell.Lamina tecti by end setting for
The sealed connection portion of housing seal connection guarantees to realize good sealing effect between shell and lamina tecti, reduces shell and top
There is a possibility that seal failure situation when being tightly connected in the end outer surface of cover board.
On the one hand, the utility model embodiment proposes a kind of lamina tecti, is used for secondary cell, and lamina tecti is included in length
Two ends being oppositely arranged on direction, at least one of two ends include sealed connection portion, wherein sealed connection portion packet
The first joint face and the second joint face are included, the first joint face and the second joint face extend along short transverse；First joint face with
The intersection of second joint face and formation pointed structures.
According to the one aspect of the utility model embodiment, sealed connection portion further includes to be connected with the first joint face
One transition face and the second transition face being connected with the second joint face；First joint face intersects setting with First Transition face, and second
Joint face intersects setting with the second transition face.
According to the one aspect of the utility model embodiment, the angle of First Transition face and the first joint face is obtuse angle, the
The angle of two transition faces and the second joint face is obtuse angle.
According to the one aspect of the utility model embodiment, pointed structures include the intersection extended along short transverse, end
Including the transverse plane being connected with First Transition face and the second transition face, intersection is coplanar with transverse plane.
According to the one aspect of the utility model embodiment, end further includes being connected simultaneously with transverse plane and First Transition face
The first arc-shaped transitional surface connect and the second arc-shaped transitional surface being connected simultaneously with transverse plane and the second transition face, the first circular arc
The axis of the axis of transition face and the second arc-shaped transitional surface extends along the short transverse of lamina tecti.
According to the one aspect of the utility model embodiment, the first joint face and the second joint face are plane.
According to the one aspect of the utility model embodiment, the angle of the first joint face and the second joint face between the two is
30 ° to 120 °.
According to the one aspect of the utility model embodiment, the first joint face and the second joint face are arc surface, and that
This is directed towards recess.
According to the one aspect of the utility model embodiment, the top of lamina tecti is convex with outwardly protruding in the width direction
Edge.
According to the one aspect of the utility model embodiment, lamina tecti further includes annular protruding rib, a part of annular protruding rib
Extend on the first joint face and the second joint face.
It is close for what is be hermetically connected with the shell by being arranged in end according to lamina tecti provided by the embodiment of the utility model
Interconnecting piece is sealed to guarantee to realize good sealing effect between shell and lamina tecti.Shell can connect with the first joint face and second
Junction is tightly connected.The pointed structures that first joint face and the second joint face are formed can be more preferable with shell compactness, thus shell
The connection transition position of body and the first joint face, shell and the second joint face and shell and the first joint face and the second joint face is all
It is not easy to gap occur, the end outer surface of reduction shell and lamina tecti the possibility of seal failure situation occurs when being tightly connected
Property.
On the other hand, the utility model embodiment provides a kind of secondary cell comprising：
Electrode assembly has two output end opposite along short transverse；Such as the lamina tecti of above-described embodiment, lamina tecti
Two output end of electrode assembly are respectively arranged at along the side of short transverse；Shell, jacketed electrode component and and lamina tecti
It is tightly connected, shell includes along the sealing docking section that short transverse extends, and shell further includes being tightly connected with the first joint face
First seal section and the second seal section being tightly connected with the second joint face, the first seal section and the second seal section are separately connected
In sealing docking section.
According to the other side of the utility model embodiment, the quantity of lamina tecti is two, and two lamina tectis are right respectively
Two output end should be set to, and the second joint face of the first joint face of a lamina tecti and another lamina tecti is in height
Degree is oppositely arranged on direction, and the first seal section of shell is equal with the first joint face quantity of two lamina tectis, and the second of shell
Seal section is equal with the second joint face quantity of two lamina tectis.
According to the other side of the utility model embodiment, the quantity for sealing docking section is one, and shell passes through one
Sheet material is formed along the circumferential jacketed electrode component of electrode assembly, and two edges of sheet material are in the side of electrode assembly stacking and close
It seals to form the sealing docking section of stepped construction.
According to the other side of the utility model embodiment, the quantity for sealing docking section is two, and shell passes through two
Sheet material is fastened and connected to be formed, to clamp electrode assembly, two edges of a sheet material respectively with two edges of another sheet material
Corresponding to be laminated and be sealed to form two sealing docking sections, two sealing docking sites are in the opposite two sides of electrode assembly.
According to the other side of the utility model embodiment, electrode assembly is flat structure, the outer peripheral surface of electrode assembly
Including two wide faces being oppositely arranged and two leptoprosopy being oppositely arranged；Shell has bottom wall and side wall, and bottom wall is faced with width
It should be arranged, side wall is correspondingly arranged with leptoprosopy, and the first seal section, the second seal section and sealing docking section are all set in side wall.
According to the other side of the utility model embodiment, side wall includes that first intersected with the first seal section is tilted over
Cross section, the arc section being connected with the first angled transition section and the second angled transition section being connected with arc section, arc section
The section perpendicular with short transverse be arc-shaped, the first lamina tecti of angled transition Duan Yuyi First Transition face cooperation,
Second transition face of the second angled transition section and another lamina tecti cooperates.
Detailed description of the invention
The feature, advantage and technical effect of the utility model exemplary embodiment described below with reference to the accompanying drawings.
Fig. 1 is the overall structure diagram of the lamina tecti of an embodiment in the utility model first embodiment；
Fig. 2 is partial enlarged view at A in Fig. 1；
Fig. 3 is the end construction schematic diagram of the lamina tecti of an embodiment of the present invention；
Fig. 4 is the end construction schematic diagram of the lamina tecti of another embodiment of the utility model；
Fig. 5 is the overall structure diagram of the lamina tecti of another embodiment in the utility model first embodiment；
Fig. 6 is the overall structure diagram of the lamina tecti of another embodiment in the utility model first embodiment；
Fig. 7 is the overall structure diagram of the lamina tecti of the utility model second embodiment；
Fig. 8 is the overall structure diagram of the lamina tecti of the utility model 3rd embodiment；
Fig. 9 is the electrode assembly and lamina tecti assembly structure diagram of an embodiment of the present invention；
Figure 10 is the overall structure diagram of the secondary cell of an embodiment of the present invention；
Figure 11 is partial enlarged view at B in Figure 10；
Figure 12 is the schematic diagram of housing structure of an embodiment of the present invention；
Figure 13 is the overall structure diagram of the secondary cell of another embodiment of the utility model；
Figure 14 is the decomposition texture schematic diagram of the secondary cell of an embodiment of the present invention.
In the accompanying drawings, the attached drawing is not drawn according to the actual ratio.
Description of symbols：
1, end；11, transverse plane；12, the first arc-shaped transitional surface；13, the second arc-shaped transitional surface；
2, sealed connection portion；21, the first joint face；22, the second joint face；23, First Transition face；24, the second transition face；
3, top surface；
4, bottom surface；
5, flange；
6, annular protruding rib；
7, electrode assembly；
8, shell；81, docking section is sealed；82, the first seal section；83, the second seal section；84a, the first angled transition section；
84b, arc section；84c, the second angled transition section；
9, side plane；
X, length direction；Y, short transverse；Z, width direction；
α, angle.
Specific embodiment
The embodiments of the present invention is described in further detail with reference to the accompanying drawings and examples.Following embodiment
The detailed description and the accompanying drawings for illustratively illustrating the principles of the present invention, but cannot be used to limit the model of the utility model
It encloses, i.e., the utility model is not limited to described embodiment.
In the description of the present invention, it should be noted that unless otherwise indicated, the meaning of " plurality " is two or two
More than a；The orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right", "inner", "outside" is merely for convenience of retouching
State the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second "
Etc. being used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill in the art,
Visual concrete condition understands the concrete meaning of above-mentioned term in the present invention.
The utility model in order to better understand, below with reference to Fig. 1 to Fig. 8 to the lamina tecti of the utility model embodiment into
Row detailed description.
The lamina tecti of the utility model is applied to secondary cell.The lamina tecti of the present embodiment has scheduled length, width
And height.In each diagram, using the whole height direction of lamina tecti as short transverse Y, with the entire length direction of lamina tecti
For length direction X, using both perpendicular to the direction of short transverse Y and length direction X as width direction Z.
The secondary cell of the present embodiment includes shell, is set to the intracorporal electrode assembly of shell and is hermetically connected with the shell
Lamina tecti.Specifically, electrode assembly includes positive plate, negative electrode tab and the diaphragm being set between positive plate and negative electrode tab, just
It is connected with anode ear on pole piece, is connected with negative electrode lug in negative electrode tab.Lamina tecti be equipped with electrode terminal, electrode terminal be used for just
The electric energy of electrode assembly, is drawn out to the outside of shell by tab or negative electrode lug connection.The secondary cell of the present embodiment assembled
Electrode assembly and lamina tecti are assembled into an overall structure in advance by Cheng Shi, are then manufactured in the external process of electrode assembly
Shell out.Since shell finally needs to be tightly connected with lamina tecti to complete the packaging process to electrode assembly, shell with
Sealing requirements between lamina tecti are high.It is formed after being tightly connected between the shell and lamina tecti of the present embodiment around lamina tecti one
The annular seal in week.
Fig. 1 schematically shows the overall structure of the lamina tecti of an embodiment in the utility model first embodiment.Such as
Shown in Fig. 1 and Fig. 2, the lamina tecti of the utility model embodiment includes two ends 1 being oppositely arranged on length direction X.Two
At least one of a end 1 includes sealed connection portion 2.It is required according to product design, flexible choice is arranged close an end 1
Envelope interconnecting piece 2 or two ends 1 are respectively provided with sealed connection portion 2.Usual shell and the sealing effect of lamina tecti end 1 are poor,
The case where being easy to appear seal failure.The lamina tecti of the present embodiment is close for what is be hermetically connected with the shell by being arranged in end 1
Envelope interconnecting piece 2 guarantees to realize good sealing effect between shell and lamina tecti, can be effectively reduced shell and lamina tecti it
Between there is a possibility that seal failure situation.
The lamina tecti of the present embodiment includes the top and bottom end being oppositely arranged on short transverse Y.Top has top surface 3.
Bottom end has bottom surface 4.The sealed connection portion 2 of the present embodiment includes the first joint face 21 and the second joint face 22.First joint face
21 and second joint face 22 along short transverse Y extend, further, the first joint face 21 and the second joint face 22 are from top cover
The top surface 3 of plate extends to the bottom surface 4 of lamina tecti.First joint face 21 intersects with the second joint face 22 and forms pointed structures.This
Sample, shell can be tightly connected with the first joint face 21 and the second joint face 22.22 shape of first joint face 21 and the second joint face
At pointed structures can be more preferable with shell compactness, thus shell and the first joint face 21, shell and the second joint face 22 with
And the connection transition position of shell and the first joint face 21 and the second joint face 22 is all not easy to gap occur, reduces shell and top cover
There is a possibility that seal failure situation when being tightly connected in 1 outer surface of end of plate.
Further describe the technical solution of the utility model below by way of specific embodiment, but following embodiment and unlimited
Determine the protection scope of the utility model claims.
First embodiment：
As shown in Figures 1 to 6, lamina tecti includes two opposite side planes 9 and in length direction on width direction Z
The upper two opposite transverse planes 11 of X.One end 1 of lamina tecti includes sealed connection portion 2.The sealed connection portion 2 of the present embodiment
Including the first joint face 21, the second joint face 22, the First Transition face 23 being connected with the first joint face 21 and with second connect
The second transition face 24 that junction 22 is connected.
On short transverse Y, the first joint face 21 and the second joint face 22 extend from top surface 3 towards bottom surface 4, but first
Joint face 21 and the second joint face 22 extend preset distance on short transverse Y not through the bottom surface of lamina tecti 4, from
And make the pointed structure in 1 part of end that the sealed connection portion 2 is set.On length direction X, the first joint face 21 and one
Side plane 9 is connected.Second joint face 22 is connected with another side plane 9.
The First Transition face 23 of the present embodiment and the second transition face 24 are tilted towards the bottom surface of lamina tecti 4, thus first
Transition face 23 and the second transition face 24 are in ramped shaped.First Transition face 23 simultaneously with 21, side planes 9 of the first joint face and
Transverse plane 11 is connected.Second transition face 24 is connected with the second joint face 22, another side plane 9 and transverse plane 11 simultaneously.
When needing to be packaged operation to electrode assembly, shell can with the first joint face 21, the second joint face 22 and
Remaining peripheral surface is tightly connected on lamina tecti, and forms the annular seal zones around lamina tecti.In this way, shell and lamina tecti
Between when being tightly connected, shell can be fitted closely with the first joint face 21 and the second joint face 22, with the first joint face 21
Reliable sealing area is formed with the second joint face 22.Simultaneously because First Transition face 23 and the second transition face 24 are in ramped shaped,
So that shell can connect on short transverse Y from transverse plane 11 and 9 gentle transition of side plane to the first joint face 21 and second
Face 22.In one example, hot melting way is used between shell and lamina tecti.The hot melting way of the present embodiment can be Laser Welding
It connects, infrared welding or heat-sealing.
Fig. 3 schematically shows the end construction of the lamina tecti of an embodiment of the present invention.In one embodiment,
As shown in figure 3, the first joint face 21 and the second joint face 22 can be plane.22 liang of first joint face 21 and the second joint face
Angle α between person is 30 ° to 120 °.
Fig. 4 schematically shows the end construction of the lamina tecti of another embodiment of the utility model.In one embodiment
In, as shown in figure 4, the first joint face 21 and the second joint face 22 can also be arc surface, and it is recessed towards one another.
First joint face 21 of the present embodiment and the second joint face 22 form the intersection in line segment formula.The intersection and lamina tecti
Transverse plane 11 it is coplanar.In this way, shell directly transits to the first joint face 21 and second from transverse plane 11 on short transverse Y
The intersection of joint face 22 is not in the different step-like structure of height, is conducive to shell and keeps stress equalization, improve shell with
The sealing reliability of first joint face 21 and the second joint face 22.
As shown in Figures 1 to 4, the end 1 of the present embodiment further includes being connected simultaneously with transverse plane 11 and First Transition face 23
The first arc-shaped transitional surface 12 connect.First arc-shaped transitional surface 12 is circular arc line segment with short transverse Y perpendicular cross-sectional profiles.
The axis of first arc-shaped transitional surface 12 extends along the short transverse Y of lamina tecti.A side plane 9 and transverse plane 11 for lamina tecti it
Between be connected by the first arc-shaped transitional surface 12.The end 1 of the present embodiment further includes same with transverse plane 11 and the second transition face 24
When the second arc-shaped transitional surface 13 for being connected.Second arc-shaped transitional surface 13 is circle with short transverse Y perpendicular cross-sectional profiles
Arc segment.It is connected between another side plane 9 and transverse plane 11 of lamina tecti by the first arc-shaped transitional surface 12.Second circular arc
The axis of transition face 13 extends along the short transverse Y of lamina tecti.Shell is in the first arc-shaped transitional surface 12 and the second arc transition
Transition is gentle at face 13, is not in the case where stress is concentrated.
Fig. 5 schematically shows the overall structure of the lamina tecti of another embodiment in the utility model first embodiment.
Fig. 6 schematically shows the overall structure of the lamina tecti of another embodiment in the utility model first embodiment.In a reality
It applies in example, as shown in Figure 5 and Figure 6, the sealed connection portion 2 of same structure also can be set in the other end 1 of lamina tecti, further
Promote the reliability and stability of two ends 1 sealed connection of shell and lamina tecti.
As shown in figure 5, the top of the lamina tecti of the present embodiment has the flange 5 outwardly protruded on width direction Z, make
The width for obtaining top surface 3 is greater than the width of bottom surface 4.Flange 5 can be cyclic structure, be also possible to strip structure.Flange 5 can be
Positioning action is realized to the position of shell in shell and lamina tecti connection procedure.When shell is against on flange 5 and then to shell
It is sealed operation with lamina tecti, improves the connection precision and connection working efficiency of shell and lamina tecti.
As shown in fig. 6, the lamina tecti of the present embodiment further includes annular protruding rib 6.A part of annular protruding rib 6 is in the first connection
Extend on face 21 and the second joint face 22, another part extends in remaining peripheral surface of lamina tecti.The top cover of the present embodiment
When plate includes the flange 5 of above-described embodiment, the top surface height of annular protruding rib 6 is lower than the height of the top surface of flange 5.It is optional
Ground, the quantity of annular protruding rib 6 can be one, keep preset distance with the top surface 3 of lamina tecti.Optionally, the number of annular protruding rib 6
Amount can be two or more.More than two annular protruding ribs 6 are spaced setting on short transverse Y, wherein near lamina tecti top
One annular protruding rib 6 at end and the top surface 3 of lamina tecti keep preset distance.The annular protruding rib 6 of the present embodiment is conducive to promote shell
Sealing effect between body and lamina tecti.
Second embodiment：
In the first embodiment, the structure that docking section is sealed included by lamina tecti is illustrated.In the present embodiment
In, the difference of main explanation and first embodiment, identical structure is not repeated to illustrate in the present embodiment.
Fig. 7 schematically shows the overall structure of the lamina tecti of the utility model second embodiment.As shown in fig. 7, top
Sealed connection portion 2 is arranged in one end 1 of cover board.The sealed connection portion 2 of the present embodiment only includes the first joint face 21 and second
Joint face 22 does not include First Transition face 23 and the second transition face 24.On short transverse Y, the sealed connection portion 2 of the present embodiment
Included the first joint face 21 and the second joint face 22 extends to bottom surface 4 from top surface 3, so that 1 entirety of end is in
Pointed structures.Shell can be fitted closely with the first joint face 21 and the second joint face 22, with the first joint face 21 and second
Joint face 22 forms reliable sealing area.In one embodiment, the first joint face 21 and the second joint face 22 are crossed to form
The intersection of the line segment shape of bottom surface 4 is extended to from the top surface of lamina tecti 3.
3rd embodiment：
In the first embodiment, the structure that docking section is sealed included by lamina tecti is illustrated.In the present embodiment
In, the difference of main explanation and first embodiment, identical structure is not repeated to illustrate in the present embodiment.
Fig. 8 schematically shows the overall structure of the lamina tecti of the utility model 3rd embodiment.As shown in figure 8, top
Sealed connection portion 2 is arranged in one end 1 of cover board.On short transverse Y, the sealed connection portion 2 of the present embodiment includes and first
The perpendicular First Transition face 23 of joint face 21 and second transition face 24 perpendicular with the second joint face 22.Shell can be with
First joint face 21 and the second joint face 22 are tightly connected.The lamina tecti of the present embodiment further includes transverse plane 11.First joint face
21 and second joint face 22 formed line segment formula intersection.The intersection is coplanar with the transverse plane 11 of lamina tecti.
Fig. 9 schematically shows the electrode assembly and top cover board assembling structure of an embodiment of the present invention.Figure 10 shows
Show to meaning property the overall structure of the secondary cell of an embodiment of the present invention.
In conjunction with shown in Fig. 9 and Figure 10, the utility model embodiment also provides a kind of secondary cell comprising electrode assembly 7,
The lamina tecti and shell 8 of above-described embodiment.The electrode assembly 7 of the present embodiment has two outputs opposite along short transverse Y
End.Lamina tecti is set to output end along the side of short transverse Y.
The 8 jacketed electrode component 7 of shell of the present embodiment and with lamina tecti be tightly connected.Shell 8 includes prolonging along short transverse Y
The sealing docking section 81 stretched.Shell 8 further includes the first seal section 82 being tightly connected with the first joint face 21 and connects with second
The second seal section 83 that junction 22 is tightly connected.First seal section 82 and the second seal section 83 are connected to sealing docking section
81.On width direction Z, the first seal section 82 and the second seal section 83 are located at the two sides for sealing docking section 81.
In one embodiment, secondary cell assembling process is that electrode assembly 7 and lamina tecti are completed assembling in advance.So
Electrode assembly 7 is wrapped up using shell blank afterwards, and processes sealing docking section 81 in shell blank, to form complete tubular
Shell 8.Finally shell 8 and lamina tecti are tightly connected using hot melting way again.In one example, shell 8 is plastic cement material,
With good flexible and plasticity.
If transverse plane 11 included by the end 1 of the lamina tecti of the present embodiment extends to bottom surface 4 from top surface 3, it is not provided with
The sealed connection portion 2 of above-described embodiment is easy to appear between the sealing docking section 81 that shell blank is formed and transverse plane 11 and is bonded
It is not close and the case where lead to seal failure.Behind the lamina tecti setting sealed connection portion 2 of the present embodiment, the first joint face 21 and the
The intersection region that two joint faces 22 are formed can press on the inner surface of sealing docking section 81, to guarantee in sealing docking section 81
It is fitted closely between surface and lamina tecti.It simultaneously can be with close to the first seal section 82 of sealing docking section 81 and the second seal section 83
It is fitted closely respectively with the first joint face 21 and the second joint face 22.
Angle between first seal section 82 of the present embodiment and sealing docking section 81 in obtuse angle so that the first of shell 8
Transition is gentle each other for seal section 82 and sealing docking section 81.Angle between second seal section 83 and sealing docking section 81 is also in blunt
Angle, so that transition is gentle each other for the second seal section 83 of shell 8 and sealing docking section 81.In this way, the appearance of shell 8 and lamina tecti
The each region in face all keeps fitting closely state, effectively improves leakproofness between the two.
Figure 12 schematically shows the shell structure of an embodiment of the present invention.In one embodiment, in conjunction with figure
Shown in 10 and Figure 12, an end 1 of lamina tecti includes sealed connection portion 2.Correspondingly, sealing docking section included by shell 8
81 quantity is one.Shell 8 is by a sheet material along circumferential jacketed electrode component 7 formation of electrode assembly 7.Two of sheet material
Edge is laminated in the side of electrode assembly 7 and is sealed to form the sealing docking section 81 of stepped construction.Two edges of sheet material
The contact surface that stacking is formed is aligned with the intersection of the first joint face 21 and the second joint face 22.First seal section 82 of shell 8 with
First joint face 21 is tightly connected, and the second seal section 83 and the second joint face 22 are tightly connected.
The quantity of the lamina tecti of the present embodiment is two.Two lamina tectis are respectively arranged at two outputs of electrode assembly 7
End, and the second joint face 22 of the first joint face 21 of a lamina tecti and another lamina tecti phase on short transverse Y
To setting.One end 1 of lamina tecti includes sealing docking section 2.Shell 8 includes that two the first seal sections 82 and two are second close
Seal section 83.Two the first seal sections 82 are corresponding with the first joint face 21 of two lamina tectis respectively to be tightly connected.Two second close
Seal the sealed connection corresponding with the second joint face 22 of two top covers respectively of section 83.
Figure 13 schematically shows the overall structure of the secondary cell of another embodiment of the utility model.Figure 14 is schematic
Ground shows the decomposition texture of the secondary cell of an embodiment of the present invention.In one embodiment, in conjunction with Figure 13 and Figure 14
Shown, two ends 1 of lamina tecti include sealed connection portion 2.Correspondingly, the number of docking section 81 is sealed included by shell 8
Amount is two.Shell 8 is fastened and connected to be formed by two sheet materials, to clamp electrode assembly 7.Distinguish at two edges of one sheet material
Stacking corresponding with two edges of another sheet material is simultaneously sealed to form two sealing docking sections 81.Two sealing docking sections 81
Positioned at the opposite two sides of electrode assembly 7.Two edges of one sheet material and two edges of another sheet material are laminated to form two
A contact surface, wherein the first joint face 21 included by an end 1 on a contact surface and lamina tecti in two ends 1
It is aligned with the intersection of the second joint face 22, included by another end 1 on another contact surface and lamina tecti in two ends 1
The first joint face 21 and the second joint face 22 intersection alignment.First seal section 82 of shell 8 and the first joint face 21 seal
Connection, the second seal section 83 and the second joint face 22 are tightly connected.
The quantity of the lamina tecti of the present embodiment is two.Two lamina tectis are respectively arranged at two outputs of electrode assembly 7
End, and the second joint face 22 of the first joint face 21 of a lamina tecti and another lamina tecti phase on short transverse Y
To setting.Two ends 1 of lamina tecti include sealing docking section 2.Shell 8 includes four the first seal sections 82 and four second
Seal section 83.Four the first seal sections 82 are corresponding with the first joint face 21 of two lamina tectis respectively to be tightly connected.Four second
Seal section 83 is corresponding with the second joint face 22 of two top covers respectively to be tightly connected.The shell 8 that the sheet material of above-described embodiment is formed
With bottom wall and side wall.Electrode assembly 7 is flat structure.The outer peripheral surface of electrode assembly 7 include in the width direction Z be oppositely arranged
Two leptoprosopy that two wide faces and along its length X are oppositely arranged.In one example, electrode assembly 7 passes through positive plate, bears
Pole piece and the diaphragm being set between positive plate and negative electrode tab surround the wireline reel coil of wire around formation.Electrode assembly 7 has along volume
Two ends opposite around axis.After positive plate, negative electrode tab and the membrane winding that is set between positive plate and negative electrode tab
Each end forms spiral helicine pitch of the laps.
In one embodiment, as shown in figure 14, the bottom wall of shell 8 is the biggish wide wall of area, the width with electrode assembly 7
The corresponding setting in face.The side wall of shell 8 is the lesser narrow wall of area, setting corresponding with the leptoprosopy of electrode assembly 7.Side wall is towards remote
Direction recess from electrode assembly 7.Side wall includes the first angled transition section 84a intersected with the first seal section 82, inclines with first
Arc section 84b, the second angled transition section 84c being connected with arc section 84b that oblique changeover portion 84a is connected, wherein arc section
The section perpendicular with short transverse Y of 84b is circular arc line segment.The overall structure of the electrode assembly 7 of the present embodiment is flat knot
Structure.First angled transition section 84a of the sheet material of the present embodiment can be with the First Transition face included by lamina tecti in ramped shaped
23 match, and arc section 84b can match with the external surface shape of electrode assembly 7, and the second angled transition section 84c can be with
Match included by lamina tecti in the second transition face 24 of ramped shaped, the shell 8 formed in this way is to the wrapped of electrode assembly 7
More preferably.
It is steady that sealing state can be formed between shell 8 and lamina tecti included by the secondary cell of the utility model embodiment
Fixed reliable sealing area reduces secondary cell and sealing mistake occurs so that secondary cell integrally has good leakproofness
It imitates and leads to that secondary cell is scrapped or the case where non-normal working occurs in secondary cell.
Although the present utility model has been described by reference to the preferred embodiments, but in the model for not departing from the utility model
In the case where enclosing, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as not depositing
In structural conflict, items technical characteristic mentioned in the various embodiments be can be combined in any way.The utility model
It is not limited to specific embodiment disclosed herein, but is included all technical solutions falling within the scope of the claims.
Claims (16)
1. a kind of lamina tecti is used for secondary cell, it is characterised in that：
The lamina tecti includes two ends (1) being oppositely arranged on length direction X, in two ends (1) at least
One includes sealed connection portion (2),
Wherein, the sealed connection portion (2) includes the first joint face (21) and the second joint face (22), first joint face
(21) extend along short transverse Y with second joint face (22)；First joint face (21) and second joint face
(22) intersect and form pointed structures.
2. lamina tecti according to claim 1, which is characterized in that the sealed connection portion (2) further includes and described first
The First Transition face (23) and the second transition face (24) being connected with second joint face (22) that joint face (21) is connected；
First joint face (21) intersects setting, second joint face (22) and second mistake with the First Transition face (23)
Cross face (24) intersection setting.
3. lamina tecti according to claim 2, which is characterized in that the First Transition face (23) and first joint face
(21) angle is obtuse angle, and the angle of second transition face (24) and second joint face (22) is obtuse angle.
4. lamina tecti according to claim 2 or 3, which is characterized in that the pointed structures include along the short transverse Y
The intersection of extension, the end (1) include the transverse plane being connected with the First Transition face (23) and the second transition face (24)
(11), the intersection is coplanar with the transverse plane (11).
5. lamina tecti according to claim 4, which is characterized in that the end (1) further includes and the transverse plane (11)
With the First Transition face (23) simultaneously the first arc-shaped transitional surface (12) for being connected and with the transverse plane (11) and described
The second arc-shaped transitional surface (13) that second transition face (24) is connected simultaneously, the axis of first arc-shaped transitional surface (12) and institute
The axis for stating the second arc-shaped transitional surface (13) extends along the short transverse Y.
6. lamina tecti according to claim 1 or 2, which is characterized in that first joint face (21) and described second connects
Junction (22) is plane.
7. lamina tecti according to claim 6, which is characterized in that first joint face (21) and second joint face
(22) between the two angle (α) is 30 ° to 120 °.
8. lamina tecti according to claim 1 or 2, which is characterized in that first joint face (21) and described second connects
Junction (22) is arc surface, and is recessed towards one another.
9. lamina tecti according to claim 1, which is characterized in that the top of the lamina tecti has Z-direction in the width direction
The flange (5) of outer protrusion.
10. lamina tecti according to claim 1, which is characterized in that the lamina tecti further includes annular protruding rib (6), described
A part of annular protruding rib (6) extends on first joint face (21) and second joint face (22).
11. a kind of secondary cell, which is characterized in that including：
Electrode assembly (7), the described in any item lamina tectis of such as claim 2 to 10 and shell (8)；
The electrode assembly (7) has two output end opposite along the short transverse Y；The lamina tecti is set to described
Output end is along the side of the short transverse Y；The shell (8) coats the electrode assembly (7) and close with the lamina tecti
Envelope connection, the shell (8) include along the short transverse Y extend sealing docking section (81), the shell (8) further include with
It the first seal section (82) that first joint face (21) is tightly connected and is tightly connected with second joint face (22)
Second seal section (83), the first seal section (82) and the second seal section (83) are connected to the sealing docking section (81).
12. secondary cell according to claim 11, which is characterized in that the quantity of the lamina tecti is two, two institutes
It states lamina tecti and respectively corresponds and be set to two output end, and first joint face (21) of a lamina tecti
It is oppositely arranged on the short transverse Y with second joint face (22) of lamina tecti described in another；The shell (8)
First seal section (82) is equal with the first joint face quantity of two lamina tectis, the shell (8) it is described
Second seal section (83) is equal with the second joint face (22) quantity of two lamina tectis.
13. secondary cell according to claim 11, which is characterized in that the quantity of sealing docking section (81) is one
A, the shell (8) coats the electrode assembly (7) along the circumferential direction of the electrode assembly (7) by a sheet material and is formed, described
Two edges of sheet material are laminated in the side of the electrode assembly (7) and are sealed to form the sealing docking of stepped construction
Portion (81).
14. secondary cell according to claim 11, which is characterized in that the quantity of sealing docking section (81) is two
A, the shell (8) is fastened and connected to be formed by two sheet materials, two edges of a sheet material respectively with another Zhang Suoshu
Two edges of sheet material are corresponding to be laminated and is sealed to form two sealing docking sections (81), described two sealing docking sections
(81) it is located at the two sides opposite on the length direction X of the electrode assembly (7).
15. secondary cell according to claim 12, which is characterized in that the electrode assembly (7) is flat structure, described
The outer peripheral surface of electrode assembly (7) includes two wide faces being oppositely arranged and two leptoprosopy being oppositely arranged；
The shell (8) has bottom wall and side wall, and the bottom wall is correspondingly arranged with the wide face, the side wall and the leptoprosopy pair
It should be arranged,
First seal section (82), second seal section (83) and the sealing docking section (81) are all set in the side
Wall.
16. secondary cell according to claim 15, which is characterized in that the side wall includes and first seal section
(82) the first angled transition section (84a) intersected, the arc section (84b) that is connected with the first angled transition section (84a) with
And the second angled transition section (84c) being connected with the arc section (84b), the first angled transition section (84a) with one
The First Transition face (23) of the lamina tecti cooperates, the second angled transition section (84c) and another described lamina tecti
Second transition face (24) cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820413312.9U CN208173640U (en) | 2018-03-26 | 2018-03-26 | Lamina tecti and secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820413312.9U CN208173640U (en) | 2018-03-26 | 2018-03-26 | Lamina tecti and secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208173640U true CN208173640U (en) | 2018-11-30 |
Family
ID=64376009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820413312.9U Active CN208173640U (en) | 2018-03-26 | 2018-03-26 | Lamina tecti and secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208173640U (en) |
-
2018
- 2018-03-26 CN CN201820413312.9U patent/CN208173640U/en active Active
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