CN110364643A - Secondary battery and method for manufacturing secondary battery - Google Patents
Secondary battery and method for manufacturing secondary battery Download PDFInfo
- Publication number
- CN110364643A CN110364643A CN201810252349.2A CN201810252349A CN110364643A CN 110364643 A CN110364643 A CN 110364643A CN 201810252349 A CN201810252349 A CN 201810252349A CN 110364643 A CN110364643 A CN 110364643A
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- Prior art keywords
- electrode assembly
- shell
- docking section
- assembly
- sealing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
-
- 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
Abstract
The present invention relates to a secondary battery and a method of manufacturing the secondary battery. The secondary battery includes: an electrode assembly having two ends opposite in a height direction; the number of the top cover assemblies is two, and the two top cover assemblies are respectively arranged at two ends of the electrode assembly; and a case enclosing the electrode assembly, the case having two open ends opposed to each other in a height direction, the two open ends being hermetically connected to the two cap assemblies, respectively, to form a sealed space accommodating the electrode assembly, the case including a hermetically sealed docking portion extending from one of the cap assemblies to the other cap assembly in the height direction. The secondary battery of the embodiment of the invention comprises the top cover component and the electrode component which can be assembled in advance, and then the shell is processed and manufactured outside the electrode component and the top cover component.
Description
Technical field
The present invention relates to technical field of secondary batteriess, more particularly to the manufacturer of a kind of secondary cell and secondary cell
Method.
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 top cover and electrode assembly are integrally inserted into hard shell, finally by top cover
With hard shell welded seal；Then electrode assembly is put into pit, finally by another kind for soft outer is stamped out pit
Pit is sealed again.The wall thickness needs of former mode, hard shell are made thicker with proof strength, and otherwise hard shell is opened
Mouth end is easily deformed, so that top cover and electrode assembly are difficult to be inserted into hard shell, however the wall thickness of hard shell is made thicker
Secondary energy density can be reduced again；Latter approach, pit is limited by Sheet Metal Forming Technology can not be made too deep, therefore be put into
The thickness of electrode assembly in pit can only be made relatively thin, this is unfavorable for the raising of secondary cell energy density.
Summary of the invention
The embodiment of the present invention provides the manufacturing method of a kind of secondary cell and secondary cell.Top included by secondary cell
Cap assemblies and electrode assembly can be previously-completed assembling, then produce shell in electrode assembly and cap assembly external process, this
The processing and manufacturing mode of sample reduces secondary cell and fabricates difficulty, while improving the energy density of secondary cell.
On the one hand, the embodiment of the present invention proposes a kind of secondary cell comprising:
Electrode assembly has two opposite in the height direction ends；Cap assembly, the quantity of cap assembly are two
A, two cap assemblies are respectively arranged at two ends of electrode assembly；Shell, jacketed electrode component, shell tool there are two
Opposite open end in short transverse, two open ends are tightly connected with two cap assemblies respectively, to form accommodate electrod group
The confined space of part, shell include the sealing docking for extending to another cap assembly from a cap assembly along short transverse
Portion.
According to an aspect of an embodiment of the present invention, cap assembly includes lamina tecti, and lamina tecti protrudes into open end and and shell
Body is tightly connected, and lamina tecti includes two opposite in the longitudinal direction free ends；Seal docking section from lamina tecti from
By holding towards the extension of the free end of another lamina tecti.
According to an aspect of an embodiment of the present invention, the quantity for sealing docking section is one, and shell passes through a sheet material edge
The circumferential jacketed electrode component of electrode assembly is formed, and two edges of sheet material are laminated in the side of electrode assembly and are sealed to shape
At the sealing docking section of stepped construction.
According to an aspect of an embodiment of the present invention, the quantity for sealing docking section is two, and shell passes through two piece material buckles
Connection is closed to be formed, to clamp electrode assembly, two edges of a sheet material respectively with two edge respective layers of another sheet material
Two sealing docking sections are folded and are sealed to form, two sealing docking sites are in the opposite in the longitudinal direction of electrode assembly
Two sides.
According to an aspect of an embodiment of the present invention, electrode assembly is flat structure, and the outer peripheral surface on electrode assembly includes
Two opposite wide faces and two opposite along its length leptoprosopy in the width direction, docking section is corresponding with leptoprosopy sets for sealing
It sets.
According to an aspect of an embodiment of the present invention, leptoprosopy is arc surface, seals the center phase of docking section and leptoprosopy
It is correspondingly arranged.
According to an aspect of an embodiment of the present invention, shell is flexible structure, and the material of shell and the material of lamina tecti are equal
For plastic cement.
According to an aspect of an embodiment of the present invention, sealing docking section is bent towards the direction close to electrode assembly, and and shell
Peripheral surface corresponding with the lamina tecti for protruding into open end is mutually fixed on body.
The secondary cell of the embodiment of the present invention provided according to embodiments of the present invention does not need to use and is inserted into electrode assembly
The mode of shell is assembled, but electrode assembly and cap assembly are completed connection in advance, then in electrode assembly and top cover
Component external forms shell using shell blank package electrode assembly.In an assembling process, not only electrode assembly will not be by shell
It scrapes and is damaged, while but also cap assembly and electrode assembly welding process are easily operated, no longer needing between the two
Excessive welding space is reserved, the integrally-built compactedness that cap assembly and electrode assembly are formed is effectively ensured, is conducive to mention
The energy density of high secondary cell.In addition, the shell blank of the present embodiment needs to keep elasticity and plasticity to be easy to bend deformation,
Therefore the thickness of itself does not need It is not necessary to which what is manufactured is blocked up, therefore the secondary cell for completing to fabricate can be made whole yet
Body is compact-sized and lightweight, is conducive to the energy density for improving secondary cell.Furthermore due to the shell of the embodiment of the present invention
It is finally to fabricate, therefore the thickness of electrode assembly is not influenced or limitation by shell structure, so as to according to production
Product requirement flexibly selects the electrode assembly of suitable thickness to fabricate secondary cell, and then is conducive to improve secondary cell
Energy density.
On the other hand, a kind of manufacturing method of secondary cell is provided according to embodiments of the present invention, which is characterized in that including
Following steps:
Assembling steps, provide electrode assembly and two cap assemblies, and two cap assemblies are respectively arranged at electrode assembly edge
Two opposite ends of short transverse；
Encapsulation step, using shell encapsulated electrode component, shell is by sheet material package and encapsulated electrode component is formed, sheet material
The sealing docking section for extending to another cap assembly from a cap assembly along short transverse is formed after encapsulation, shell has edge
Two opposite open ends of short transverse, two open ends are tightly connected with two cap assemblies respectively, to be formed for accommodating
The confined space of electrode assembly.
Other side according to an embodiment of the present invention, in encapsulation step,
Circumferential jacketed electrode component of the shell by a sheet material along electrode assembly is formed, and two edges of sheet material are in electrode
The side of component is laminated and is sealed to form the sealing docking section of stepped construction；Alternatively,
Shell is fastened and connected to be formed by two sheet materials, to clamp electrode assembly, two edges of a sheet material respectively with
Two edges of another sheet material are corresponding to be laminated and is sealed to form two sealing docking sections, and two sealing docking sites are in electricity
The two sides opposite in the longitudinal direction of pole component.
Other side according to an embodiment of the present invention, after encapsulation step, manufacturing method further include:
Docking section will be sealed towards the direction bending close to electrode assembly, and on shell with protrude into the cap assembly of open end
Corresponding peripheral surface is mutually fixed.
Other side according to an embodiment of the present invention, in encapsulation step, by hot melting way by shell and top cover group
Part is tightly connected.
Detailed description of the invention
The feature, advantage and technical effect of exemplary embodiment of the present are described below by reference to attached drawing.
Fig. 1 is the broken section structural schematic diagram of the secondary cell of one embodiment of the invention；
Fig. 2 is the overall structure diagram of the secondary cell of one embodiment of the invention；
Fig. 3 is partial enlarged view at A in Fig. 2；
Fig. 4 is the overall structure diagram of the secondary cell of another embodiment of the present invention；
Fig. 5 is partial enlarged view at B in Fig. 4；
Fig. 6 is the overall structure diagram of the secondary cell of further embodiment of this invention；
Fig. 7 is the decomposition texture schematic diagram of the secondary cell of one embodiment of the invention；
Fig. 8 is the manufacturing method flow chart of the secondary cell of one embodiment of the invention.
In the accompanying drawings, the attached drawing is not drawn according to the actual ratio.
Description of symbols:
1, electrode assembly；1a, wide face；1b, leptoprosopy；1c, axis；
2, cap assembly；21, lamina tecti；
3, shell；31, docking section is sealed；
98, first area；99, second area；
X, short transverse；Y, length direction；Z, width direction.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment it is detailed
Thin description and attached drawing cannot be used to limit the scope of the invention for illustratively illustrating the principle of the present invention, i.e., of the invention
It 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 with
On；The orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right", "inner", "outside" is merely for convenience of description originally
Invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific side
Position construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " etc. are only used for describing
Purpose is not understood to indicate or imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill in the art, may be used
The concrete meaning of above-mentioned term in the present invention is understood depending on concrete condition.
For a better understanding of the present invention, it is carried out below with reference to Fig. 1 to Fig. 7 secondary cell according to an embodiment of the present invention detailed
Thin description.
Fig. 1 schematically shows the broken section structure of the secondary cell of one embodiment of the invention.Fig. 2 is schematically shown
The overall structure of the secondary cell of one embodiment of the invention is shown.As depicted in figs. 1 and 2, the secondary cell of the embodiment of the present invention
Including electrode assembly 1, the cap assembly being connected with electrode assembly 12 and for the shell 3 of encapsulated electrode component 1.Shell 3
It is tightly connected with cap assembly 2 with encapsulated electrode component 1.Shell 3 is tubular structure, and there are two opposite on short transverse X for tool
Open end.Electrode assembly 1 has two ends opposite on short transverse X.Each end of electrode assembly 1, which is provided with, stretches
Tab out.The quantity of cap assembly 2 is two.Two cap assemblies 2 are respectively arranged at two ends of electrode assembly 1,
In, each cap assembly 2 is electrically connected with tab set in corresponding end.Two open ends of shell 3 respectively with two
Cap assembly 2 is tightly connected, to form the confined space of accommodate electrod component 1.As shown in figure 3, shell 3 includes along short transverse
X extends to the sealing docking section 31 of another cap assembly 2 from a cap assembly 2.
The secondary cell of the embodiment of the present invention, first by cap assembly 2 and electrode assembly 1 be electrically connected composition one and half at
Product component, then using shell blank package electrode assembly 1 and cap assembly 2.Secondly, by free end included by shell blank
Portion is tightly connected to form sealing docking section 31, to form tool, there are two the shells 3 of open end.Finally, by two of shell 3
Open end is tightly connected with two cap assemblies 2 respectively, with enclosed electrode component 1.In this way, the secondary cell of the embodiment of the present invention
It does not need to assemble in such a way that electrode assembly 1 is inserted into shell 3, but it is in advance that electrode assembly 1 and cap assembly 2 is complete
At electric connection, shell 3 is directly then fabricated out using shell blank outside electrode assembly 1 and cap assembly 2.In group
During dress, not only electrode assembly 1 will not be scraped by shell 3 and is damaged, while but also cap assembly 2 and electrode assembly
1 welding process is easily operated, no longer needs to reserve excessive welding space between the two, cap assembly 2 and electrode is effectively ensured
The integrally-built compactedness that component 1 is formed is conducive to the energy density for improving secondary cell.In addition, the shell of the present embodiment
Blank needs to keep elasticity and plasticity to be easy to bend deformation, therefore the thickness of itself does not need It is not necessary to the mistake of manufacture yet
Thickness, therefore the secondary cell compact overall structure and lightweight completing to fabricate can be made, be conducive to improve secondary electricity
The energy density in pond.Furthermore since the shell of the embodiment of the present invention 3 is finally to fabricate, the thickness of electrode assembly
Degree is not influenced or limitation by 3 structure of shell, so as to flexibly select the electrode assembly of suitable thickness according to product requirement
Secondary cell is fabricated, and then is conducive to improve the energy density of secondary cell.
The cap assembly 2 of the embodiment of the present invention includes lamina tecti 21 and the electrode terminal being set on lamina tecti 21.This
The shell 3 and lamina tecti 21 of embodiment are tightly connected.Itself structure in a strip shape of the lamina tecti 21 of the present embodiment.Lamina tecti 21 has
Scheduled length, width and height.The short transverse of lamina tecti 21 is identical as the axial direction of electrode assembly 1.In each diagram, with top
The whole height direction of cover board 21 is as short transverse X, using the entire length direction of lamina tecti 21 as length direction Y, with simultaneously
It is width direction Z perpendicular to the direction of short transverse X and length direction Y.
At least part of lamina tecti 21 is inserted in the open end of shell 3, and is tightly connected with the open end of shell 3.
Lamina tecti 21 includes opposite two free ends on length direction Y.Docking section 31 is sealed from the free end of a lamina tecti 21
Extend towards the free end of another lamina tecti 21.In one example, sealing docking section 31 extends along short transverse X.
As shown in Figure 1, the electrode assembly 1 of the present embodiment is flat structure.Extend on electrode assembly 1 around own axes 1c
Outer peripheral surface include opposite face 1a two wide and two opposite leptoprosopy 1b.Face 1a two wide with it is opposite on width direction Z
Setting.Two leptoprosopy 1b are oppositely arranged on length direction Y.Sealing docking section 31 included by shell 3 is narrow with electrode assembly 1
The corresponding setting of face 1b.When being arranged side by side using the secondary cell of multiple the present embodiment to form battery modules, adjacent two
The wide face 1a of electrode assembly 1 respectively included is mutually oppositely disposed in a secondary cell, and the leptoprosopy 1b of electrode assembly 1 is sudden and violent
It is exposed to outside.Thus it is possible, on the one hand, due to sealing the setting corresponding with the leptoprosopy 1b of electrode assembly 1 of docking section 31, sealing pair
Socket part 31 will not cause location conflicts to two neighboring secondary cell arranged side by side, so that two neighboring secondary cell is respective
Wide face 1a is mutually close to be arranged, and will not shorten size of multiple secondary cells in orientation there are gap between the two, have
Conducive to the energy density for improving battery modules.On the other hand, during fabricating to form shell 3 using shell blank,
In order to enhance the leakproofness between shell 3 and cap assembly 2, need in advance to draw free end included by shell blank
Operation is stretched, then fixed operation is attached with the biggish sealing docking section 31 of formation width to two neighboring free end.Then
Two free ends are discharged, two free ends can guarantee that shell 3 is tightly attached to cap assembly under the action of elastic-restoring force
2 namely the compression that cap assembly 2 is applied of shell 3 it is larger, to be conducive to be promoted close between shell 3 and cap assembly 2
Feng Xing.When stretching free end, the direction to the drawing force that free end applies is the direction far from electrode assembly 1.Shell base
When the included two free ends of material are in the leptoprosopy side 1b, equipment is easy to use to carry out clipping operation to two free ends
And stretched operation.
In one embodiment, the leptoprosopy 1b of electrode assembly 1 is arc surface namely the axis with electrode assembly 1 of leptoprosopy 1b
The contour line in line 1c perpendicular section is circular arc line segment.Seal the center of the leptoprosopy 1b of docking section 31 and electrode assembly 1
Corresponding setting.The center refers to the center on width direction Z.3 process of shell is manufactured using shell blank
In, two adjacent free ends corresponding with the center of leptoprosopy 1b to shell blank apply far from electrode assembly 1
When drawing force, drawing force suffered by a free end is equal with drawing force suffered by another free end, to make
The stretcher strain amount for obtaining a free end is equal with the stretcher strain amount of another free end, and then is discharging by two certainly
Behind the sealed connection portion formed by end part seal, shell 3 is in balanced shape to the pressure that each region in the free end of lamina tecti applies
State avoids the case where region corresponding with lamina tecti 21 part corrugation occurs and leads to seal failure on shell 3, effectively improves
The sealing effect of the free end of shell 3 and lamina tecti.
In one embodiment, shell blank is flexible material, itself has good elasticity and plasticity, is easy to bend packet
Electrode assembly 1 is wrapped up in, stretcher strain is also easy to.When shell blank is by predetermined drawing force, self-deformation amount is larger.Shell blank
Material and the material of lamina tecti 21 all can be the identical plastic cement of ingredient, or the different plastic cement of ingredient.Shell blank institute
Including adjacent two free ends between can be tightly connected by hot melting way to be formed sealing docking section 31, to have been formed
Whole shell 3.Easily it can realize that sealing connects by hot melting way between the shell 3 and lamina tecti 21 that shell blank is formed
It connects.In this way, the shell 3 that shell blank is formed is wrapped to the entirety of electrode assembly 1 more preferable, more with the sealing state of lamina tecti 21
Stablize.In one embodiment, hot melting way can be laser welding, infrared welding or heat-sealing etc..
Sealing docking section 31 is formed after two neighboring free end sealing docking included by the shell blank of the present embodiment.
Fig. 4 schematically shows the overall structure of the secondary cell of another embodiment of the present invention.As shown in Figure 4 and Figure 5, to the sealing
Docking section 31 apply folding stress so that sealing docking section 31 towards close to electrode assembly 1 direction bend, and on shell 3
Peripheral surface is mutually fixed.Peripheral surface on shell 3 refers to corresponding with the lamina tecti 21 of open end is protruded into outer on shell 3
Surface region.In one example, the peripheral surface bonding connection on sealing docking section 31 and shell 3.In this way, sealing docking section
31 occupy little space, so that secondary cell overall structure is more compact, are conducive to the energy density for improving secondary cell.It is sealing
Docking section 31 complete bending operation after, be easy to that the peripheral surface of shell 3 and lamina tecti 21 is connected and sealed with the two it
Between formed annular seal region, while be also effectively ensured on shell 3 close to sealing docking section 31 region and lamina tecti 21 between
Keep good sealing state.
In one embodiment, as shown in Figures 1 to 5, shell blank is the sheet material of a plastic cement material.By top cover group
After part 2 and electrode assembly 1 complete assembling, using sheet material along the circumferential jacketed electrode component 1 of electrode assembly 1, and itself two
Edge (namely free end) is laminated in the side of electrode assembly 1 and is sealed to form the sealing docking section an of stepped construction
31, at this point, shell blank forms tool, there are two the shells 3 of open end.In one example, two edges of sheet material can pass through
Hot melting way to form the sealing docking section 31 of sealing, the hot melting way of the present embodiment can be laser welding, infrared welding or
Heat-sealing etc..
In the present embodiment, two edges (namely free end) of a sheet material need after the stacking of the side of electrode assembly 1
Drawing force far from electrode assembly 1 is applied to laminated portions, so that two edges are stretched, it is larger convenient for being subsequently formed width
Sealing docking section 31.Then hot melt operation is carried out to the laminated portions being stretched, so that laminated portions sealing is to form
Seal docking section 31.Finally, release sealing docking section 31 seals docking section 31 under the elastic-restoring force effect of sheet material itself
It is mobile towards close 1 direction of electrode assembly, and biggish compression can be applied to electrode assembly 1, while close to sealing on sheet material
The region of docking section 31 can also apply biggish compression to electrode assembly 1 and lamina tecti 21, to be close to electrode assembly 1 and top
Cover board 21.In this way, shell 3 avoids 3 internal reservation space of shell excessive the wrapped good of electrode assembly 1, electrode assembly is reduced
1 activity space improves the positional stability of electrode assembly 1.In addition, fitting closely between shell 3 and lamina tecti 21, shell is avoided
3 part corrugation situations, are conducive to promote the two leakproofness.
As shown in Figure 4 and Figure 5, to sealing docking section 31 apply external stress so that sealing 31 bending of docking section to and shell
The position that 3 peripheral surface is in contact.Then sealing company is implemented to shell 3 and lamina tecti 21 along the circumferential of the open end of shell 3
Operation is connect to form annular seal region therebetween.In one embodiment, along the circumferential to shell of the open end of shell 3
3 and lamina tecti 21 carry out sweat soldering so that between shell 3 and lamina tecti 21 realize sealing.The sweat soldering of the present embodiment can
To be in a manner of laser welding, infrared welding or heat-sealing etc..It is located at sealing 31 two sides of docking section as shown in figure 5, having on shell 3
First area 98 and second area 99.After sealing 31 bending of docking section, close to the first area of sealing docking section 31 on shell 3
There are gaps between 98 meetings and lamina tecti 21.When using hot melting way welding, the shell 3 and/or lamina tecti 21 of melting can be filled out
The gap is filled, to block the gap, the leakproofness of shell 3 and lamina tecti 21 is effectively ensured.Close to sealing docking section 31 on shell 3
Second area 99 by sealing docking section 31 cover.Therefore using hot melting way welding when, can will sealing docking section 31 with
It melts between second area 99 and second area 99 and lamina tecti 21, is connect with second area 99 admittedly to seal docking section 31
It is fixed, docking section 31 is sealed without departing from crooked place, while guaranteeing to keep good between second area 99 and lamina tecti 21 again
Leakproofness.
In the present embodiment, as shown in figures 2 or 4, a sealing docking section 31 is from the free end of a lamina tecti 21 towards another
The free end of one lamina tecti 21 extends.In one embodiment, electrode assembly 1 be flat structure, tool there are two width face 1a with
Two leptoprosopy 1b.Two leptoprosopy 1b are oppositely arranged on length direction Y.Sealing docking section 31 is set to the leptoprosopy of electrode assembly 1
The center of 1b.In one example, electrode assembly 1 by positive plate, negative electrode tab and is set to positive plate and negative electrode tab
Between diaphragm around the wireline reel coil of wire around formation.Electrode assembly 1 has two ends opposite along winding axis.Positive plate,
Spiral helicine pitch of the laps is formed in each end after negative electrode tab and the membrane winding being set between positive plate and negative electrode tab.
In one embodiment, Fig. 6 schematically shows the overall structure of the secondary cell of further embodiment of this invention.
Fig. 7 schematically shows the decomposition texture of secondary cell shown in fig. 6.As shown in Figure 6 and Figure 7, shell blank is two modelings
The sheet material of glue material matter.After cap assembly 2 and electrode assembly 1 are completed assembling, it is fastened and connected to form shell using two sheet materials
3, to clamp electrode assembly 1.Two edges (namely free end) of one sheet material respectively with two edges of another sheet material
(namely free end) corresponding stacking, and it is sealed to form the sealing docking section 31 of two stepped constructions.Two sealing docking
Portion 31 is located at the opposite two sides of electrode assembly 1, at this point, shell blank forms tool, there are two the shells 3 of open end.Show at one
In example, two edges of a sheet material can be welded to connect close to be formed with two edges of another sheet material by hot melting way
The sealing docking section 31 of envelope.In the present embodiment, in such a way that two sheet materials seal and to form shell 3, two sheet material concatenations
Simply, the required precision of stitching position is low, therefore low for the processing and manufacturing required precision of every sheet material.
In the present embodiment, two edges (namely free end) of a sheet material respectively with two edges of another sheet material
(namely free end) respective layer poststack needs to apply the drawing force far from electrode assembly 1 to laminated portions, so that the two of stacking
A edge is stretched.Then hot melt operation is carried out to the laminated portions being stretched, so that laminated portions sealing is close to be formed
Seal docking section 31.Finally, release sealing docking section 31 seals 31 court of docking section under the elastic-restoring force effect of sheet material itself
It is mobile close to 1 direction of electrode assembly, and biggish compression can be applied to electrode assembly 1, while close to sealing pair on sheet material
The region of socket part 31 can also apply biggish compression to electrode assembly 1 and lamina tecti 21, to be close to electrode assembly 1 and top cover
Plate 21.In this way, shell 3 avoids 3 internal reservation space of shell excessive the wrapped good of electrode assembly 1, electrode assembly 1 is reduced
Activity space improves the positional stability of electrode assembly 1.In addition, fitting closely between shell 3 and lamina tecti 21, shell 3 is avoided
Corrugation situation in part is conducive to promote the two leakproofness.
In one embodiment, external stress similarly is applied so that each sealing docking section to each sealing docking section 31
The position that 31 bendings are extremely in contact with the peripheral surface of shell 3.Then along the circumferential to shell 3 and top cover of the open end of shell 3
Plate 21 is implemented to be tightly connected operation.In one embodiment, along the open end of shell 3 it is circumferential to shell 3 and lamina tecti 21 into
Row sweat soldering, so as to realize sealing between shell 3 and lamina tecti 21.In the present embodiment, with shell 3 there is a sealing to dock
The example structure design in portion 31 is identical, has the first area 98 and for being located at each sealing 31 two sides of docking section on shell 3
Two regions 99.After sealing 31 bending of docking section, the first area 98 on shell 3 close to sealing docking section 31 can be with lamina tecti 21
Between there are gaps.When using hot melting way welding, the shell 3 and/or lamina tecti 21 of melting can fill the gap, to block
The leakproofness of shell 3 and lamina tecti 21 is effectively ensured in the gap.Close to 99 quilt of second area of sealing docking section 31 on shell 3
Sealing docking section 31 is covered.Therefore using hot melting way welding when, can will sealing docking section 31 and second area 99 and
It melts between second area 99 and lamina tecti 21, is connected and fixed to seal docking section 31 with second area 99, seal docking section
31 without departing from crooked place, while guaranteeing to keep good leakproofness between second area 99 and lamina tecti 21 again.
In the present embodiment, two sealing docking sections 31 are respectively since the free end of a lamina tecti 21 is towards another lamina tecti 21
Free end extend.Electrode assembly 1 is flat structure, and there are two wide face 1a and two leptoprosopy 1b for tool.Two leptoprosopy 1b are in length
It is oppositely arranged on the Y of direction.Two sealing docking sections 31 are oppositely disposed on length direction Y, and each sealing docking section 31
It is set to the center of corresponding leptoprosopy 1b on electrode assembly 1.In one example, electrode assembly 1 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 1 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.
The secondary cell of above-mentioned two embodiment in an assembling process, does not need to be inserted into shell 33 using by electrode assembly 1
Mode assembled, but in advance electrode assembly 1 and cap assembly 2 are completed to be electrically connected, then in electrode assembly 1 and top
2 outside of cap assemblies clamps electrode assembly 1 directly to fabricate out shell 3 or in electrode assembly 1 and top using two sheet materials
Using a sheet material package electrode assembly 1 directly to fabricate out shell 3 outside cap assemblies 2.Finally by shell 3 and top cover group
Part 2 is tightly connected, and completes the assembly working of secondary cell.In this way, in an assembling process, not only electrode assembly 1 will not be by this reality
The shell 3 for applying example is scraped and is damaged, while but also cap assembly 2 and 1 welding process of electrode assembly are easily operated, the two
Between no longer need to reserve excessive welding space, be effectively ensured cap assembly 2 and electrode assembly 1 formed it is integrally-built tight
Gathering property is conducive to the energy density for improving secondary cell.The secondary cell processing and manufacturing difficulty of the present embodiment greatly reduces, effectively
Save processing cost.In addition, the sheet material of the present embodiment needs to keep elasticity and plasticity to be easy to bend deformation, therefore the thickness of itself
Degree does not need to be not necessarily to the blocked up of manufacture yet, therefore can make the secondary cell compact overall structure for completing to fabricate,
It is also beneficial to improve the energy density of secondary cell.Furthermore since the shell of the embodiment of the present invention 3 is last processing and manufacturing
At, therefore the thickness of electrode assembly is not influenced or limitation by 3 structure of shell, so as to flexibly select according to product requirement
The electrode assembly of suitable thickness fabricates secondary cell, and then is conducive to improve the energy density of secondary cell.
Fig. 8 schematically illustrates the manufacturing method flow chart of the secondary cell of the embodiment of the present invention.As shown in figure 8, this hair
Bright embodiment also provides a kind of manufacturing method of secondary cell comprising following steps:
Assembling steps, provide electrode assembly 1 and two cap assemblies 2, and two cap assemblies 2 are respectively arranged at electrode assembly
1 along itself two axially opposing end；
Encapsulation step, using 3 encapsulated electrode component 1 of shell, shell 3 is by sheet material package and encapsulated electrode component 1 is formed,
The sealing docking section 31 of the extension of electrode assembly 1 is formed away from after sheet material encapsulation, shell 3 has along two open ends short transverse X,
Two open ends are tightly connected with two cap assemblies 2 respectively, to form the confined space for being used for accommodate electrod component 1.
Anode ear is arranged in an end in two ends of the electrode assembly 1 of the present embodiment, and the setting of another end is negative
Tab.Cap assembly 2 includes lamina tecti 21 and electrode terminal.The electrode terminal and anode ear of one cap assembly 2 are electrically connected,
The electrode terminal and negative electrode lug of another cap assembly 2 are electrically connected.
During fabricating secondary cell using the secondary cell manufacturing method of the embodiment of the present invention, in advance by electrode group
Part 1 and cap assembly 2 complete assembly working, then form external shell by the way of sheet material package and encapsulated electrode component 1
Shell 3 and cap assembly 2 are finally tightly connected by body 3 again, with enclosed electrode component 1, complete the processing and manufacturing of secondary cell.
In this way, not needing to carry out group in such a way that electrode assembly 1 is inserted into shell 33 using the manufacturing method of the embodiment of the present invention
Dress, but complete to be electrically connected by electrode assembly 1 and cap assembly 2 in advance, then outside electrode assembly 1 and cap assembly 2
Shell 3 is directly fabricated out using sheet material.Finally shell 3 and cap assembly 2 are tightly connected, complete the assembling of secondary cell
Work.In an assembling process, not only electrode assembly 1 will not be scraped by the shell 3 of the present embodiment and is damaged, while but also
Cap assembly 2 and 1 welding process of electrode assembly are easily operated, no longer need to reserve excessive welding space between the two, effectively
Guarantee the integrally-built compactedness that cap assembly 2 and electrode assembly 1 are formed, is conducive to the energy density for improving secondary cell.
The secondary cell processing and manufacturing difficulty of the present embodiment is reduced significantly, effectively save processing cost.
In one embodiment, electrode assembly 1 by positive plate, negative electrode tab and is set between positive plate and negative electrode tab
Diaphragm around the wireline reel coil of wire around formation.Electrode assembly 1 has two ends opposite along winding axis.Positive plate, cathode
Spiral helicine pitch of the laps is formed in each end after piece and the membrane winding being set between positive plate and negative electrode tab.
In the encapsulation step of above-described embodiment,
Optionally, as shown in Figures 1 to 5, shell 3 is by a sheet material along the circumferential jacketed electrode component 1 of electrode assembly 1
It is formed.Two edges of one sheet material are laminated in the side of electrode assembly 1 and are sealed to form the sealing docking of stepped construction
Portion 31.In the present embodiment, a sealing docking section 31 is from the free end of a lamina tecti 21 towards the freedom of another lamina tecti 21
End extends.Electrode assembly 1 is flat structure, and there are two wide face 1a and two leptoprosopy 1b for tool.Two leptoprosopy 1b are on length direction Y
It is oppositely arranged.Sealing docking section 31 is set to the center of the leptoprosopy 1b of electrode assembly 1.
Optionally, as shown in Figure 6 and Figure 7, shell 3 is fastened and connected to be formed by two sheet materials, to clamp electrode assembly 1.
Two edges of one sheet material are corresponding with two edges of another sheet material respectively to be laminated and is sealed to form two sealings pair
Socket part 31.Two sealing docking sections 31 are located at the opposite two sides of electrode assembly 1.In the present embodiment, two sealing docking sections 31
Respectively since the free end of a lamina tecti 21 extends towards the free end of another lamina tecti 21.Electrode assembly 1 is flat structure, tool
There are two wide face 1a and two leptoprosopy 1b.Two leptoprosopy 1b are oppositely arranged on length direction Y.Two sealing docking sections 31 are in length
It is oppositely disposed on degree direction Y, and each sealing docking section 31 is set to the center of corresponding leptoprosopy 1b on electrode assembly 1
Position.
It is further comprising the steps of after above-mentioned encapsulation step: docking section 31 will be sealed towards the direction close to electrode assembly 1
Bending, and mutually fixed with peripheral surface corresponding with the cap assembly 2 of open end is protruded on shell 3.
Sealing docking section 31 is formed after two neighboring free end sealing docking included by the shell blank of the present embodiment.
Folding stress is applied to the sealing docking section 31, so that sealing docking section 31 is bent towards the direction close to electrode assembly 1, and and shell
Peripheral surface on body 3 is mutually fixed.Peripheral surface on shell 3 refer on shell 3 with 21 phase of lamina tecti that protrudes into open end
Corresponding exterior surface area.In one example, the peripheral surface on sealing docking section 31 and shell 3 is connected using hot melting way
It connects.In this way, sealing docking section 31 occupies little space, so that secondary cell overall structure is more compact, it is close to be conducive to raising energy
Degree.After bending operation is completed in sealing docking section 31, it is easy to that operation is connected and sealed to shell 3 and lamina tecti 21, while
It is effectively ensured on shell 3 and keeps good sealing state between the region and lamina tecti 21 of sealing docking section 31.
In the encapsulation step of above-described embodiment, shell 3 and cap assembly 2 are tightly connected by hot melting way.One
In a embodiment, cap assembly 2 includes lamina tecti 21 and electrode terminal.Shell 3 and lamina tecti 21 are connected using hot melting way sealing
It connects.When the present embodiment is attached using hot melting way, shell 3 and lamina tecti 21 are heated and melt, the portion melted in the two
Branch permeates bonding each other.After temperature reduces, puddle can condense hardening, to form shape between shell 3 and lamina tecti 21
At good seal area.It is not needed between shell 3 and lamina tecti 21 simultaneously using additional material (such as bonded adhesives or other are viscous
Connect agent etc.) it is sealed, reduce processing and manufacturing difficulty and processing cost.Therefore, shell 3 and lamina tecti 21 are made using hot melting way
The mode of sealed connection guarantees that sealing state is reliable and stable between shell 3 and lamina tecti 21, while easy to operate efficient.One
In a example, hot melting way can be the modes such as laser welding, infrared welding or heat-sealing.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (12)
1. a kind of secondary cell characterized by comprising
Electrode assembly (1) has two ends opposite on short transverse (X)；
Cap assembly (2), the quantity of the cap assembly (2) are two, and two cap assemblies (2) are respectively arranged at described
Two ends of electrode assembly (1)；
Shell (3), the shell (3) coat the electrode assembly (1), and there are two in the short transverse for shell (3) tool
(X) opposite open end on, two open ends are tightly connected with two cap assemblies (2) respectively, are accommodated with being formed
The confined space of the electrode assembly (1), the shell (3) include along the short transverse (X) from a cap assembly
(2) the sealing docking section (31) of another cap assembly (2) is extended to.
2. secondary cell according to claim 1, which is characterized in that the cap assembly (2) includes lamina tecti (21), institute
It states lamina tecti (21) to protrude into the open end and be tightly connected with the shell (3), the lamina tecti (21) is included in length side
Two opposite free ends upwards；Sealing docking section (31) is from the free end of a lamina tecti (21) towards separately
The free end of one lamina tecti (21) extends.
3. secondary cell according to claim 2, which is characterized in that the quantity of sealing docking section (31) is one,
The shell coats the electrode assembly (1) along the circumferential direction of the electrode assembly (1) by a sheet material and is formed, the sheet material
Two edges are laminated in the side of the electrode assembly (1) and are sealed to form the sealing docking section of stepped construction
(31)。
4. secondary cell according to claim 2, which is characterized in that the quantity of sealing docking section (31) is two,
The shell (3) is fastened and connected to be formed by two sheet materials, to clamp the electrode assembly (1), two of a sheet material
Edge is corresponding with two edges of another Zhang Suoshu sheet material respectively to be laminated and is sealed to form two sealing docking sections
(31), described two sealings docking section (31) be located at the electrode assembly (1) opposite two on the length direction (Y)
Side.
5. secondary cell according to claim 3 or 4, which is characterized in that the electrode assembly (1) is flat structure, institute
The outer peripheral surface of electrode assembly (1) is stated including (Z) opposite two wide face (1a) in the width direction and along the length direction (Y) phase
Pair two leptoprosopy (1b), sealing docking section (31) setting corresponding with the leptoprosopy (1b).
6. secondary cell according to claim 5, which is characterized in that the leptoprosopy (1b) is arc surface, the sealing pair
Socket part (31) setting corresponding with the center of the leptoprosopy (1b).
7. according to the described in any item secondary cells of claim 2 to 4, which is characterized in that the shell (3) is flexible structure,
The material of the shell (3) and the material of the lamina tecti (21) are plastic cement.
8. according to the described in any item secondary cells of claim 2 to 4, which is characterized in that sealing docking section (31) court leans on
The direction bending of the nearly electrode assembly (31), and on the shell (3) with the lamina tecti that protrudes into the open end
(21) corresponding peripheral surface is mutually fixed.
9. a kind of manufacturing method of secondary cell, which comprises the following steps:
Assembling steps, provide electrode assembly (1) and two cap assemblies (2), and two cap assemblies (2) are respectively arranged at institute
State electrode assembly (1) two ends opposite along short transverse (X)；
Encapsulation step encapsulates the electrode assembly (1) using shell (3), and the shell (3) is wrapped up by sheet material and encapsulated described
Electrode assembly (1) formation forms after the sheet material encapsulation and extends along the short transverse (X) from a cap assembly (2)
To the sealing docking section (31) of cap assembly described in another (2), the shell (3) has opposite along the short transverse (X)
Two open ends, two open ends are tightly connected with two cap assemblies (2) respectively, to be formed for accommodating
State the confined space of electrode assembly (1).
10. manufacturing method according to claim 9, which is characterized in that in the encapsulation step,
The shell (3) coats the electrode assembly (1) along the circumferential direction of the electrode assembly (1) by a sheet material and is formed, institute
Two edges for stating sheet material are laminated in the side of the electrode assembly (1) and are sealed to form the sealing pair of stepped construction
Socket part (31)；Alternatively,
The shell (3) is fastened and connected to be formed by two sheet materials, to clamp the electrode assembly (1), sheet material
Two edges are corresponding with two edges of another Zhang Suoshu sheet material respectively to be laminated and is sealed to form two sealings docking
Portion (31), described two sealings docking section (31) are located at the two sides opposite on length direction (Y) of the electrode assembly (1).
11. manufacturing method according to claim 9 or 10, which is characterized in that after the encapsulation step, the manufacture
Method further include:
By it is described sealing docking section (31) towards close to the electrode assembly (1) direction bending, and on the shell (3) with stretch
The corresponding peripheral surface of the cap assembly (2) for entering the open end is mutually fixed.
12. manufacturing method according to claim 9, which is characterized in that, will by hot melting way in the encapsulation step
The shell (3) and the cap assembly (2) are tightly connected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252349.2A CN110364643B (en) | 2018-03-26 | 2018-03-26 | Secondary battery and method for manufacturing secondary battery |
| PCT/CN2018/087084 WO2019184060A1 (en) | 2018-03-26 | 2018-05-16 | Secondary battery and method for manufacturing same |
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| CN201810252349.2A CN110364643B (en) | 2018-03-26 | 2018-03-26 | Secondary battery and method for manufacturing secondary battery |
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| CN110364643B CN110364643B (en) | 2021-05-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080166628A1 (en) * | 2007-01-10 | 2008-07-10 | Heongsin Kim | External case for secondary batteries and secondary battery using the external case |
| CN102064309A (en) * | 2009-11-16 | 2011-05-18 | 三星Sdi株式会社 | Lithium polymer secondary battery |
| CN204927359U (en) * | 2015-09-24 | 2015-12-30 | 宁德时代新能源科技有限公司 | Insulation shell structure and adopt lithium ion power batteries of this insulation shell structure |
| JP2016139494A (en) * | 2015-01-26 | 2016-08-04 | トヨタ自動車株式会社 | Laminated battery |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100864887B1 (en) * | 2007-05-25 | 2008-10-22 | 삼성에스디아이 주식회사 | Secondary battery |
| KR101042766B1 (en) * | 2009-02-05 | 2011-06-20 | 삼성에스디아이 주식회사 | Battery pack and manufacturing method the same |
| US20110039128A1 (en) * | 2009-08-11 | 2011-02-17 | Samsung Sdi Co., Ltd. | Battery pack and method of manufacturing the same |
| KR20110053835A (en) * | 2009-11-16 | 2011-05-24 | 삼성에스디아이 주식회사 | Lithium polymer secondary battery |
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- 2018-03-26 CN CN201810252349.2A patent/CN110364643B/en active Active
- 2018-05-16 WO PCT/CN2018/087084 patent/WO2019184060A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080166628A1 (en) * | 2007-01-10 | 2008-07-10 | Heongsin Kim | External case for secondary batteries and secondary battery using the external case |
| CN102064309A (en) * | 2009-11-16 | 2011-05-18 | 三星Sdi株式会社 | Lithium polymer secondary battery |
| JP2016139494A (en) * | 2015-01-26 | 2016-08-04 | トヨタ自動車株式会社 | Laminated battery |
| CN204927359U (en) * | 2015-09-24 | 2015-12-30 | 宁德时代新能源科技有限公司 | Insulation shell structure and adopt lithium ion power batteries of this insulation shell structure |
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| WO2019184060A1 (en) | 2019-10-03 |
| CN110364643B (en) | 2021-05-18 |
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