CN207690905U - Secondary cell and automobile - Google Patents
Secondary cell and automobile Download PDFInfo
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- CN207690905U CN207690905U CN201820057299.8U CN201820057299U CN207690905U CN 207690905 U CN207690905 U CN 207690905U CN 201820057299 U CN201820057299 U CN 201820057299U CN 207690905 U CN207690905 U CN 207690905U
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- lug
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
This application involves energy storage device technical field more particularly to a kind of secondary cells and automobile.Secondary cell includes：Head cover；Pole is set to the head cover；Electrode assembly, including ontology and multiple lugs for extending and being stacked from the ontology, the ontology is by the first pole piece, the second pole piece and the co-wound formation of diaphragm between first pole piece and second pole piece；The lug is electrically connected to the pole by connector；The lug extends from the side of the thickness direction of the ontology, and the lug bends relative to short transverse and is connected to the connector.In assembly, electrode assembly is easily attached the secondary cell of the application with connector, and can improve the safety of secondary cell.
Description
Technical field
This application involves energy storage device technical field more particularly to a kind of secondary cells and automobile.
Background technology
Secondary cell is widely used in mobile phone, laptop due to energy density height, advantages of environment protection
Equal electronic devices.In recent years, for response environment problem, gas price problem and energy stores problem, secondary cell is answered
With Quick Extended to hybrid electric vehicle, electric vehicle and energy storage system.
The electrode assembly of existing secondary cell includes ontology and is connected to the lug of ontology, and ontology is commonly wrapped about into more
Coil structures, there are two lugs for setting in every circle, when the lug of this structure is connect after bending with the connector of secondary cell,
Lug bending can cause its end to misplace, maximum relative to innermost lug degree of misalignment in outermost lug, and lug
Thickness it is bigger, the degree of misalignment is bigger, if lug setting it is shorter, outermost lug and connector may be caused
It can not connect, if lug setting is long, the redundancy for the innermost lug being bent to form may be caused too big, easily
Cause lug to be electrically connected with other components in secondary cell, causes secondary cell internal short-circuit, cause safety accident.
Utility model content
This application provides a kind of secondary cell and automobiles, can solve the above problems.
The first aspect of the application provides a kind of secondary cell, including：
Head cover；
Pole is set to the head cover；
Electrode assembly, including ontology and multiple conductance portions extended from the ontology, the multiple conductance portion stacking are set
Set to form lug, the ontology by the first pole piece, the second pole piece and positioned at first pole piece and second pole piece it
Between the co-wound formation of diaphragm；
The lug is electrically connected to the pole by connector；
The lug extends from the side of the through-thickness of the ontology, and the lug is bent relative to short transverse
And it is connected to the connector.
Optionally, the lug includes the ontology interconnecting piece being connect with the ontology, the extension being connect with the connector
Portion and the bending part being connected between the ontology interconnecting piece and the extension, the extension prolong along the thickness direction
It stretches, the bending part is bent relative to the extension.
Optionally, the ontology has the first side and the second side, and first side is the side where the lug, described
The second side is that the side of the lug is not arranged, and the bending part and the ontology connecting portion are in the same side.
Optionally, there are the ontology winding initial layers, the lug to extend from the side of the winding initial layers, institute
State the winding initiating terminal part that winding initial layers are the pole piece that the ontology is located at innermost circle.
Optionally, the electrode assembly is two and is arranged side by side along the thickness direction, the second of two ontologies
Side is disposed adjacent.
Optionally, further include the support element being set between the ontology and the extension.
Optionally, the support element is strip structure；The lug bypasses the support element.
Optionally, the support element is at least partly bonded with the ontology.
Optionally, the support element includes sequentially connected first part, second part and Part III along its length,
The first part is oppositely arranged with the pole,
In the support element close to the side of the head cover, the edge of the first part protrudes from described second
Point；
The first part is bonded with the ontology；The lug bypasses the second part.
Optionally, the support element includes sequentially connected first part and second part along its length, and described first
Part is oppositely arranged with the pole, and the lug bypasses the second part；
In the support element along the side of the thickness direction, the second part protrudes from the first part.
Optionally, the support element includes support portion and two both ends for being connected to the support portion and relatively described
The guidance part of support portion bending setting；
The support portion fits in the extension, and the guidance part fits in the bending part.
Optionally, each guidance part includes being connected to the interlude of the support portion and being connected to the interlude
Tilting section, two tilting sections are tilted to close to mutual direction, and the tilting section fits in the ontology interconnecting piece.
Optionally, the minimum thickness of described support element each section is 0.1mm~5mm；The Young elasticity of the support element
Modulus is 1000MPa~10000MPa.
Optionally, the ratio of the width in the conductance portion and the thickness in the conductance portion is 100~5000.
The second aspect of the application provides a kind of automobile, including any one of them secondary cell as above.
Technical solution provided by the present application can reach following advantageous effect：
Secondary cell provided herein, lug bend relative to short transverse and are connected to connector, Ke Yiti
Space availability ratio is risen to increase the energy density of secondary cell.Meanwhile electrode assembly is only provided with lug in the side of ontology,
In this way, in the case that ontology stacking thickness it is identical, the thickness of lug is obviously reduced, bending when, innermost conductance portion and
The end dislocation in outermost conductance portion is just retarded, makes outermost conductance portion be easy to connect with connector, and most inner side
The redundancy in conductance portion be also obviously reduced, avoid conductance portion from being inserted into body interior and cause secondary cell short-circuit, to reduce
The risk of secondary cell short circuit, therefore, when this secondary cell assembles, electrode assembly is easily attached with connector, and can be carried
The safety of high secondary cell.
It should be understood that above general description and following detailed description is merely exemplary, this can not be limited
Application.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of specific embodiment of secondary cell provided herein；
Fig. 2 is a kind of explosive view of specific embodiment of secondary cell provided herein；
Fig. 3 is an a kind of sectional view of specific embodiment of secondary cell provided herein；
Fig. 4 is the partial view of Fig. 3；
Fig. 5 is a kind of another sectional view of specific embodiment of secondary cell provided herein；
Fig. 6 is the partial view of Fig. 5；
Fig. 7 is the structural schematic diagram of a kind of specific embodiment of connector in secondary cell provided herein；
Fig. 8 is the structural schematic diagram of another specific embodiment of connector in secondary cell provided herein；
Fig. 9 is the structural schematic diagram of a kind of specific embodiment of support element in secondary cell provided herein；
Figure 10 is the structural schematic diagram of another specific embodiment of support element in secondary cell provided herein；
Figure 11 is the sectional view of another specific embodiment of support element in secondary cell provided herein；
Figure 12 is the explosive view of another specific embodiment of secondary cell provided herein；
Figure 13 is a sectional view of another specific embodiment of secondary cell provided herein；
Figure 14 is the partial view of Figure 13；
Figure 15 is the structural schematic diagram of another specific embodiment of support element in secondary cell provided herein；
Figure 16 is the structural schematic diagram of a kind of specific embodiment of electrode assembly in secondary cell provided herein.
Reference numeral：
100- head covers；
110- explosionproof holes；
120- liquid injection holes；
200- shells；
The first poles of 300-；
The second poles of 400-；
The first connectors of 500-；
510- pole interconnecting pieces；
520- lug interconnecting pieces；
530- transition connection portions；
The second connectors of 600-；
640- fuse part；
700- electrode assemblies；
710- ontologies；
The first pole pieces of 711-；
The second pole pieces of 712-；
713- diaphragms；
The first lugs of 720-；
721- ontology interconnecting pieces；
722- bending parts；
723- extensions；
The second lugs of 730-；
740- winds initial layers；
800- support elements；
810- first parts；
811- first edges；
812- second edges；
The depressed areas 813-；
814- protects structure accommodating area；
820- Part III；
The explosion-proof valve openings of 821-；
830- second parts；
840- through-holes；
860- notch；
870- support portions；
880- guidance parts；
881- interludes；
882- tilting sections；
900- protects structure.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and the principle together with specification for explaining the application.
Specific implementation mode
It is described in further detail below by specific embodiment and in conjunction with attached drawing to the application.Wherein, with Fig. 1 institutes
The placement location of the secondary cell shown is object, and using the short transverse of secondary cell as short transverse Z, with secondary cell
Length direction is length direction X, using the thickness direction of secondary cell as thickness direction Y.
As illustrated in figs. 1-16, the embodiment of the present application provides a kind of secondary cell, including head cover 100, pole (such as the first pole
Column 300 and the second pole 400), electrode assembly 700 and connector (such as the first connector 500 and the second connector 600), pole
It is placed in the head cover 100；Electrode assembly 700 includes ontology 710 and multiple conductance portions extended from ontology 710, multiple conductances
Portion is stacked to form lug (such as the first lug 720 and the second lug 730), and ontology 710 passes through the first pole piece 711, the second pole
Piece 712 and the 713 co-wound formation of diaphragm between the first pole piece 711 and the second pole piece 712, as shown in figure 16.Even
Lug is electrically connected to pole by fitting.Wherein, from the through-thickness Y of ontology 710, (thickness direction Y is ontology 710 to lug
Thickness direction) side extend, lug bends relative to short transverse Z and is connected to connector.
Above-mentioned secondary cell, electrode assembly 700 are only provided with lug in the side of ontology 710, in this way, in ontology 710
In the case of stacking thickness is identical, the thickness of lug is obviously reduced, in bending, innermost conductance portion and outermost conductance
The end dislocation in portion is just retarded, makes outermost conductance portion be easy to connect with connector, the redundancy in innermost conductance portion
Degree is obviously reduced, reduce due to conductance portion redundancy is too long and when by top extruding force, the conductance portion of redundancy may be inserted into
Body interior causes the risk of secondary cell short circuit.Therefore, when this secondary cell assembly, electrode assembly 700 and connector are easy
In connection, and the safety of secondary cell can be improved.
As shown in Figs. 1-3, secondary cell further includes shell 200, and head cover 100 is covered on the top of shell 200, electrode assembly
700 are contained in shell 200.As shown in Fig. 2, head cover 100 is provided with explosionproof hole 110 and liquid injection hole 120.Above-mentioned pole includes the
One pole 300 and the second pole 400, the first pole 300 and the second pole 400 are respectively arranged at the top of head cover 100.Connector
Including the first connector 500 and the second connector 600；Lug includes the first lug 720 and the second lug 730, the first conductance portion
Extend from the first pole piece 711 along the side of above-mentioned short transverse Z, the second conductance portion is from the second pole piece 712 along above-mentioned height side
Extend to the side of Z, with reference to figure 16, the first pole piece 711, the second pole piece 712 and the stacking winding of diaphragm 713 are specifically, each to roll up
In winding layer, the first conductance portion that the first pole piece 711 extends is layered on top of each other to form the first lug 720, and the second pole piece 712 extends
The second conductance portion be layered on top of each other to form the second lug 730, and each first lug 720 and each second lug 730 are from ontology 710
The side of through-thickness Y (thickness direction Y is the thickness direction of ontology 710) extend.When secondary cell assembles,
As shown in figure 3, the first lug 720 is connect by the first connector 500 with the first pole 300, the second lug 730 connects by second
Fitting 600 is connect with the second pole 400.
It is the winding for the pole piece that ontology 710 is located at innermost circle that ontology 710, which has winding initial layers 740, winding initial layers 740,
Initiating terminal part, lug extend from winding initial layers 740 along the side of above-mentioned thickness direction Y, in this way, positioned at the electricity of innermost layer
It leads portion and reduces positioned at the span of outermost conductance portion through-thickness Y, during lug bending, lug is far from ontology
710 end dislocation reduces, and is easier to connect with connector；And this mode can shorten the development length of lug entirety, drop
Since redundancy is too long the risk of short circuit occurs for low lug.Wherein, winding initial layers 740 can be the winding of the first pole piece 711
Initiating terminal part does not extend the first lug 720 in the part, and the first lug 720 and the second lug 730 are respectively positioned on winding initial layers
The side of 740 through-thickness Y.
The structure of 720 and second lug 730 of above-mentioned first lug can be identical, specific by taking the first lug 720 as an example below
Explanation.As seen in figs. 5-6, the first lug 720 includes the ontology interconnecting piece 721 being connect with ontology 710, prolonging of being connect with connector
Extending portion 723 and the bending part 722 being connected between ontology interconnecting piece 721 and extension 723, extension 723 is along above-mentioned thickness
Direction Y extends, and bending part 722 is bent relative to extension 723.Using this structure, keep the first lug 720 as regular as possible
Ground is bent, and to increase the space availability ratio inside secondary cell, increases the energy density of secondary cell.
It is the side where lug, i.e. edge that ontology 710 has the first side and the second side, the first side along above-mentioned thickness direction Y
Thickness direction Y, to wind initial layers 740 as boundary, side that ontology 710 extends the first lug 720 and the second lug 730 is the
Side, the other side are the second side, i.e., the second side is that the side of lug is not arranged, and ontology interconnecting piece 721 can be along above-mentioned thickness side
Extend to direction of the Y-direction far from the first side, but this can increase the length of the first lug 720 extension.The implementation of the application
In example, bending part 722 and ontology interconnecting piece 721 are located at the same side, i.e., ontology interconnecting piece 721 relative to ontology 710 to separate the
The direction of two sides extends, that is to say, that first to ontology 710, the outside far from the second side extends the first lug 720, forms ontology and connects
Then socket part 721 is bent to form bending part 722 and extension 723 relative to ontology interconnecting piece 721 again, it is clear that this structure,
The length (length refers to the size that the first lug 720 extends along direction in unfolded state) of the first lug 720 is shortened, is reduced
The redundancy of first lug 720 can preferably improve secondary safety.
It is to be appreciated that lug compares concentration in bending place stress, in order to alleviate the stress that bending generates, ontology interconnecting piece
721 with the junction of bending part 722, the equal arc-shaped transition in junction of bending part 722 and extension 723, with prevent lug due to
Bending produces fracture, and improves the reliability of secondary cell.
In view of the area of passage of lug, more same winding layer extends the scheme of two lugs, the lug of the application
Stacking thickness is obviously reduced, and in order to ensure the area of passage of lug, the ratio of the width in conductance portion and the thickness in conductance portion is 100
~5000, i.e. lug is arranged wider, increases the area of passage of lug with this.Wherein, the width in above-mentioned conductance portion refers to conductance
Portion refers to conductance portion in unfolded state along above-mentioned thickness in unfolded state along the size of above-mentioned length direction X, the thickness in conductance portion
Spend the size of direction Y.
Above-mentioned electrode assembly 700 can be provided only with one, can also be arranged there are two, in setting there are two electrode assembly
When 700, two 700 through-thickness Y of electrode assembly are arranged side by side, in a kind of embodiment, the first side of an ontology 710 and another
The second side of one ontology 710 is adjacent, and two ontology interconnecting pieces 721 are layered on top of each other, and two extensions 723 are layered on top of each other, secondary
Battery is needed on short transverse Z corresponding to the thickness of two ontology interconnecting pieces 721 of offer and the thickness of two extensions 723
Space is unfavorable for improving the energy density of secondary cell.In another embodiment of the application, as shown in Fig. 2, Fig. 5, Fig. 6, two
The second side of a ontology 710 is disposed adjacent, in this way, two the first lugs 720 are non-interference, respectively around 500 edge of the first connector
The both sides bending of thickness direction Y extends, and at least two ontology interconnecting pieces 721 will not be laminated, and this setup, secondary cell exists
The thickness that an ontology interconnecting piece 721 is considerably reduced on short transverse Z, to reduce secondary cell short transverse Z ruler
It is very little, improve the energy density of secondary cell.Preferably, two extensions 723 extend towards, and spaced therebetween,
Can two extensions 723 be located at the first side of the ontology 710 respectively connected, in this way, two extensions 723 will not
Stacking, can further decrease secondary cell above-mentioned short transverse Z size.
The structure of 500 and second connector 600 of above-mentioned first connector can be identical, is with the first connector 500 below
Example is described in detail, as shown in fig. 7, the first connector 500 includes pole interconnecting piece 510 and lug interconnecting piece 520, lug connects
Socket part 520 raise up relative to pole interconnecting piece 510 it is extended, with the top of pole interconnecting piece 510 formed for accommodate connect
The pole accommodating space for connecing the first pole 300 is formed in the lower section of lug interconnecting piece 520 for accommodating the first lug 720 of connection
Lug accommodating space, in this way, ontology interconnecting piece 721 is set to lug accommodating space, it is accommodating that the first pole 300 is connected to pole
Space, making full use of the thickness of the first connector 500, (thickness refers to ruler of first connector 500 on above-mentioned short transverse Z
It is very little), on the short transverse Z of secondary cell, the first pole 300 and the first lug 720 is enable to share the first connector 500
Thickness space, to reduce the size on secondary cell short transverse Z, to improve the energy density of secondary cell；And first pole
Ear 720 is connect with the lower surface of lug interconnecting piece 520, can increase the contact surface of the first lug 720 and the first connector 500
Product increases the reliability of the two connection, meanwhile, this connection type, compared with the side of the first lug 720 and the first connector 500
The mode of connection is ensureing the same of the first lug 720 and 500 connection area of the first connector by by 720 bending of the first lug
When, additionally it is possible to reduce size of first lug 720 in secondary cell short transverse, the energy for further increasing secondary cell is close
Degree；In addition, the first lug 720 to be connected to the lower section of lug interconnecting piece 520, the end of the first lug 720 can be connected by first
Fitting 500 covers, and then avoids the end burr of the first lug 720 that the first lug 720 is caused to wait components directly to connect with head cover 100
Connection is touched, the safety of secondary cell is improved.
First connector 500 further includes the transition connection portion 530 of connecting post interconnecting piece 510 and lug interconnecting piece 520, mistake
It crosses interconnecting piece 530 and tilts up setting relative to pole interconnecting piece 510, to increase the rigidity of the first connector 500.
In addition, when secondary cell overcharges generation short circuit, in order to quickly disconnect being electrically connected between pole and electrode assembly 700
It connects, fuse part 640 can be set on connector, as shown in figure 8, fuse part 640 is arranged on the second connector 600, when secondary
After short circuit occurs for battery, second connector 600 disconnects at fuse part 640, makes pole interconnecting piece 510 and lug interconnecting piece 520
It disconnects, to be disconnected the status of electrically connecting of the second pole 400 and the second lug 730.Wherein, fuse part 640 can by
Through-hole is arranged in transition connection portion 530 to be formed, so that the area of passage of fuse part 640 is less than other areas on the second connector 600
The area of passage in domain.
When being provided with fuse part 640 on connector, secondary cell further includes protection structure 900, as shown in Fig. 2, protection
Structure 900 can be plastic parts, be coated on the periphery of fuse part 640, after fuse part 640 fuses, due to there is protection structure 900
Protection, fuse part 640 do not fall out, and the first pole piece 711 is caused to prevent fuse part 640 from falling in electrode assembly 700
With the short circuit of the second pole piece 712, therefore, it is possible to improve the safety of secondary cell.
After the first lug 720 is connect with the first connector 500, due to being influenced by gravity, the first connector can be caused
500 bend to the direction of ontology 710, may lead to the first pole piece 711, the second pole piece 712 of the first lug 720 and ontology 710
Contact, causes 700 internal short-circuit of electrode assembly, when vibrated especially in secondary cell application process and impact, can cause tight
The safety accident of weight.To solve the above-mentioned problems, the secondary cell of the application further includes being set to ontology 710 and extension 723
Between support element 800, by increase support element 800, even if oriented ontology 710 is curved under gravity for the first lug 720
The trend of folding can also be supported the obstruction of part 800, and support element 800 keeps apart the first lug 720 with ontology 710, can
Further decrease the risk that extension 723 is contacted with the first pole piece 711, the second pole piece 712；In addition, the first lug 720 by
When extruding, since support element 800 keeps apart itself and ontology 710, the end of the first lug 720 is difficult to be pierced into ontology
710, it can also reduce the risk of 700 internal short-circuit of electrode assembly；Meanwhile first lug 720 around support element 800 bend, make
The bending of first lug 720 is more regular, plays the role of shaping to the first lug 720, it is easier to the first lug 720 and first
The connection of connector 500.
With reference to figure 9-11, support element 800 can be strip structure；Lug bypasses support element 800, as shown in figure 3, first connects
Fitting 500 and the second connector 600 are located at the both ends of support element 800, and the first lug 720, the second lug 730 are respectively from branch
Support member 800 close to ontology 710 around to support element 800 close to the first connector 500 while, make two extensions 723
It is located between the first connector 500 and support element 800 between the second connector 600 and support element 800.This structure
The inside division of secondary cell is upper and lower two spaces, each component and ontology in upper space can be isolated by support element 800
710 contact, and then improve the safety of secondary cell；And this structure can improve the integral strength of support element 800, simultaneously
A component is only assembled, the process that assembly secondary cell can be saved.
When head cover 100 and shell 200 assemble, if lug is by downward active force, the ontology interconnecting piece of lug
721 may be inserted into the inside of ontology 710, cause 712 short circuit of the first pole piece 711 and the second pole piece.In order to solve this problem, originally
In one embodiment of application, support element 800 is at least partly bonded with ontology 710, using this structure, in ontology interconnecting piece
During 721 are squeezed, due to there is the support of support element 800, the stress of lug are reduced, lug can be avoided to be inserted into
In the ontology 710 of electrode assembly 700, short circuit is prevented, and then improve the security performance of secondary cell.
Specifically, support element 800 includes sequentially connected first part 810, second part 830 and third along its length
Part 820, first part 810 are oppositely arranged with pole, when equipped with pole interconnecting piece 510, pole interconnecting piece 510 and first
810 are divided to be oppositely arranged；Lug bypasses second part 830；Part III 820 is provided with explosion-proof valve opening 821, with secondary cell
Explosionproof hole 110 is opposite.It is to be appreciated that there are two first part 810 and second part 830 be respectively provided with, i.e. 820 edge of Part III
The both sides of above-mentioned length direction X are both provided with first part 810 and second part 830, so that the first lug 720 and the second lug
730 bypass two second parts 830 respectively, and the first pole 300 and the second pole 400 are respectively arranged at Liang Ge first parts 810
Top.
In a kind of embodiment, for support element 800 in the one side close to head cover 100, the edge of first part 810 protrudes from second
Part 830, as shown in figs. 9-11, to form depressed area 813 in the central area of first part 810, pole interconnecting piece 510 is accommodating
In in the depressed area 813, in such manner, it is possible to make full use of support element 800 along the size of above-mentioned short transverse Z, by pole interconnecting piece
510 are set in first part 810；And (thickness refers to since the edge of first part 810 is big compared with the thickness of second part 830
Along the size of above-mentioned short transverse Z), therefore, it is possible to increase the rigidity of support element 800, avoid support element 800 since length is too big
Caused by be bent.And above-mentioned lug accommodating space is formed between second part 830 and connector, the extension 723 of lug also can
The thickness of support element 800 is enough made full use of, reduces lug and size of the support element 800 on above-mentioned short transverse Z, and then improve
The energy density of secondary cell.
Further, the bottom surface of depressed area 813 relative to second part 830 close to head cover 100 one towards 710 institute of ontology
Direction be recessed, that is to say, that the bottom surface of depressed area 813 compared with second part 830 close to head cover 100 one side closer to ontology
710, in this way, connector can be further recessed in support element 800, preferably improve the energy density of secondary cell.
The rigidity of support element 800 in order to further increase, as shown in figs. 10-11, support element 800 is close to ontology 710
On one side, the edge of first part 810 protrudes from second part 830；First part 810 is bonded with ontology 710.
Wherein, the edge of first part 810 includes the first edge 811 being connected with each other and second edge 812, first edge
811 are arranged along above-mentioned thickness direction Y, and second edge 812 is arranged along above-mentioned length direction X, first edge 811 and second edge
812 protrude from second part 830, it should be noted that second edge 812 can be arranged there are one (as shown in Figure 9), also may be used
With setting, there are two (as shown in Figure 10).
Optionally, as shown in figs. 10-11, in support element 800 along the two sides of above-mentioned short transverse Z (i.e. close to head cover 100
And close to ontology 710 while), Part III 820 protrudes from second part 830, to further increase support element 800
Rigidity.In this embodiment, since second part 830 is relatively thin, Part III 820 is thicker, therefore in second part 830 and
The junction of three parts 820 easily causes tearing, and in order to solve this problem, the application is in second part 830 and Part III 820
Notch 860 is arranged in junction, can be in Part III 820 along the both sides of above-mentioned length direction X and along above-mentioned thickness direction Y's
Both sides are both provided with notch 860.Wherein, notch 860 can be arc incision, preferably to alleviate second part 830 and third
The stress concentration of 820 junction of part prevents from being broken at this.
Certainly, support element 800 can be plane close to the one side of ontology 710, to increase support element 800 and ontology 710
Contact area, pressure of the uniform support part 800 to ontology 710 everywhere are prevented ontology 710 from excessively being concentrated due to the pressure being subject to and made
At the bending of the first pole piece 711 and the edge of the second pole piece 712.
In a kind of embodiment, in support element 800 along the side of above-mentioned thickness direction Y, second part 830 protrudes from first
Divide 810, as shown in figure 9, using this structure, when the length of lug is longer, makes lug around second part 830 along above-mentioned thickness
Degree direction Y protrudes from the side of first part 810, increases the path length of lug bending, and it is too long to alleviate lug redundancy,
It avoids lug redundancy that lug is caused to contact caused short circuit with the first pole piece 711 or the second pole piece 712 as far as possible, improves secondary
The safety of battery；When the length of lug is shorter, lug can be made around second part 830 along the another of above-mentioned thickness direction Y
Side ensures the connection of lug and connector to shorten the bending path of lug.
It should be noted that being provided with fuse part in connector (such as the first connector 500 or the second connector 600)
When 640, support element 800 is additionally provided with protection structure accommodating area 814, and protection structure accommodating area 814 can be groove, Huo Zhetong
Hole, protection structure accommodating area 814 can be set to depressed area 813, to further decrease connector with support element 800 in above-mentioned height
The size of direction Z improves the energy density of secondary cell.
It is to be appreciated that when support element 800 is strip structure, it is additionally provided with through-hole 840 on support element 800, with head cover
100 liquid injection hole 120 is oppositely arranged, for fluid injection inside secondary cell.
In another embodiment, there are two the settings of support element 800, i.e. the first lug 720 and the second lug 730 are rotating around two
A support element 800 is arranged, and this structure is independent of each other, can prevent when two support elements 800 and two lugs are squeezed
It is pulled caused by deformation of the lug of one end by other end support element 800, to improve the safety of secondary cell.
It is described by taking a support element 800 as an example below.As shown in figs. 12-15, support element 800 includes support portion 870
The guidance part 880 at the both ends and the opposite bending of support portion 870 setting that are connected to support portion 870 with two, support portion 870 paste
Together in extension 723, bending part 722 fits in guidance part 880, and lug extends to support portion 870 along the bending of guidance part 880,
Keep the bending of lug more controllable, increases shaping operation of the support element 800 to lug；And it is assembled in head cover 100 and shell 200
When, lug is squeezed with support element 800, and the end of two guidance parts 880 is close to each other, can be relieved stress, and is risen to lug
To supporting role, lug is avoided to be inserted into the ontology 710 of electrode assembly 700, prevents the generation of short circuit, improve secondary cell
Safety；Meanwhile during extruding, lug is softened with the deformation of guidance part 880 along above-mentioned thickness direction Y, from
And the stacking in above-mentioned short transverse Z is avoided, thus, it is also possible to puncture diaphragm 713 after further preventing lug to be squeezed
Cause electrode assembly 700 short-circuit, improves the safety of secondary cell.
Guidance part 880 may include tilting section 882, when lug extends to support portion 870 by tilting section 882, due to inclining
Oblique section 882 and the bending angle of support portion 870 are too big, easily cause lug and form wedge angle at this, lug is caused to be easily broken off.This
In one embodiment of application, each guidance part 880 includes being connected to the interlude 881 of support portion 870 and being connected to interlude
881 tilting section 882, two tilting sections 882 are tilted to close to mutual direction, and tilting section 882 fits in ontology interconnecting piece
721, and tilting section 882 and support portion 870 are located at the homonymy of interlude 881, there are deformations between the end of two guidance parts 880
Interval, i.e., support element 800 formed similar to c-type structure, this structure, pass through increase interlude 881 so that lug successively around
Tilting section 882, interlude 881 extends to support portion 870, lug needs to bend twice, to alleviate the curved of each time of lug
Folding degree prevents lug in rupture, and then improves the safety of secondary cell.
Further, the end of two guidance parts 880 extends to winding initial layers 740, which is guiding
The winding initial layers 740 for the ontology 710 that the lug that portion 880 is guided is connected can be from lug and ontology using the structure
Guide function is played in 710 junctions to lug, and the end of guidance part 880 in extrusion process is avoided to puncture lug.
Preferably, the minimum thickness of 800 each section of support element is 0.1mm~5mm, i.e. 800 each section of support element is along upper
State short transverse Z minimum dimension be 0.1mm~5mm, as 0.1mm, 0.15mm, 0.5mm, 1mm, 2.5mm, 3.5mm, 4.5mm,
4.9mm, 5mm etc.；The Young's modulus of elasticity of support element 800 be 1000MPa~10000MPa, as 1000MPa, 3000MPa,
5000MPa、8000MPa、9000MPa、10000MPa.By above-mentioned setting, it can ensure the elastic deformation energy of support element 800
Power, to improve guide function of the support element 800 to lug.
It should be noted that support element 800 be above-mentioned strip structure (i.e. a support element 800 is only arranged in secondary cell,
It is the same support element 800 to support the support element 800 of the first lug 720 and the second lug 730) when, support element 800 can also wrap
Support portion 870 and guidance part 880 are included, at this point, the both ends of support element 800 are both provided with support portion 870 and guidance part 880.
The material of above-mentioned support element 800 is isolation material, such as can be plastic cement material；The material of connector is metal material
Matter, such as nickel sheet.
First pole piece 711 can be positive plate, and the second pole piece 712 is negative plate, and correspondingly, the first pole 300 is anode
Column, the second pole 400 are negative terminal；Can also the first pole piece 711 be negative plate, the second pole piece 712 be positive plate, correspondingly,
First pole 300 is negative terminal, and the second pole 400 is positive terminal.
In addition, present invention also provides a kind of automobile, including the secondary cell described in any embodiment as above.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (15)
1. a kind of secondary cell, which is characterized in that including：
Head cover；
Pole is set to the head cover；
Electrode assembly, including ontology and multiple conductance portions extended from the ontology, the multiple conductance portion are stacked shape
At lug, the ontology is by the first pole piece, the second pole piece and between first pole piece and second pole piece
The co-wound formation of diaphragm；
The lug is electrically connected to the pole by connector；
The lug extends from the side of the through-thickness of the ontology, and the lug is relative to short transverse bending and quilt
It is connected to the connector.
2. secondary cell according to claim 1, which is characterized in that the lug includes the ontology being connect with the ontology
Interconnecting piece, the extension being connect with the connector and the bending being connected between the ontology interconnecting piece and the extension
Portion, the extension extend along the thickness direction, and the bending part is bent relative to the extension.
3. secondary cell according to claim 2, which is characterized in that the ontology has the first side and the second side, described
First side is the side where the lug, and the second side is that the side of the lug is not arranged, the bending part and described
Ontology connecting portion is in the same side.
4. secondary cell according to claim 1, which is characterized in that the ontology has winding initial layers, the lug
Extend from the side of the winding initial layers, the winding initial layers are that the winding for the pole piece that the ontology is located at innermost circle rises
Initial portion.
5. secondary cell according to claim 3, which is characterized in that the electrode assembly is two and along the thickness side
To being arranged side by side, the second side of two ontologies is disposed adjacent.
6. secondary cell according to claim 5, which is characterized in that further include being set to the ontology and the extension
Between support element.
7. secondary cell according to claim 6, which is characterized in that the support element is strip structure；The lug around
Cross the support element.
8. secondary cell according to claim 7, which is characterized in that the support element is at least partly shown consideration for described
It closes.
9. secondary cell according to claim 8, which is characterized in that the support element includes being sequentially connected along its length
First part, second part and Part III, the first part is oppositely arranged with the pole；
In the support element close to the side of the head cover, the edge of the first part protrudes from the second part；
The first part is bonded with the ontology；The lug bypasses the second part.
10. secondary cell according to claim 7, which is characterized in that the support element includes connecting successively along its length
The first part connect and second part, the first part are oppositely arranged with the pole, and the lug bypasses described second
Point；
In the support element along the side of the thickness direction, the second part protrudes from the first part.
11. secondary cell according to claim 6, which is characterized in that the support element includes support portion and two difference
It is connected to the guidance part of the both ends of the support portion and the relatively described support portion bending setting；
The support portion fits in the extension, and the guidance part fits in the bending part.
12. secondary cell according to claim 11, which is characterized in that each guidance part includes being connected to the branch
The interlude of support part and the tilting section for being connected to the interlude, two tilting sections are tilted to close to mutual direction, institute
It states tilting section and fits in the ontology interconnecting piece.
13. secondary cell according to claim 12, which is characterized in that the minimum thickness of described support element each section is
0.1mm~5mm；The Young's modulus of elasticity of the support element is 1000MPa~10000MPa.
14. secondary cell according to claim 1, which is characterized in that the width in the conductance portion and the conductance portion
The ratio of thickness is 100~5000.
15. a kind of automobile, which is characterized in that including such as claim 1-14 any one of them secondary cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820057299.8U CN207690905U (en) | 2018-01-12 | 2018-01-12 | Secondary cell and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820057299.8U CN207690905U (en) | 2018-01-12 | 2018-01-12 | Secondary cell and automobile |
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| Publication Number | Publication Date |
|---|---|
| CN207690905U true CN207690905U (en) | 2018-08-03 |
Family
ID=62990933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820057299.8U Active CN207690905U (en) | 2018-01-12 | 2018-01-12 | Secondary cell and automobile |
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| Country | Link |
|---|---|
| CN (1) | CN207690905U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922993A (en) * | 2018-08-14 | 2018-11-30 | 江苏海基新能源股份有限公司 | The rectangular winding multi-pole lug lithium ion battery of one kind and its assembly method |
| WO2021023060A1 (en) * | 2019-08-07 | 2021-02-11 | 江苏时代新能源科技有限公司 | Secondary battery and battery pack |
| CN113302777A (en) * | 2019-12-04 | 2021-08-24 | 宁德时代新能源科技股份有限公司 | Electrode assembly, method of molding electrode assembly, production system for electrode assembly, secondary battery, battery module, and device |
| CN113871807A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Battery and battery pack |
| US11482755B2 (en) | 2019-08-07 | 2022-10-25 | Jiangsu Contemporary Amperex Technology Limited | Secondary battery and battery pack |
-
2018
- 2018-01-12 CN CN201820057299.8U patent/CN207690905U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922993A (en) * | 2018-08-14 | 2018-11-30 | 江苏海基新能源股份有限公司 | The rectangular winding multi-pole lug lithium ion battery of one kind and its assembly method |
| WO2021023060A1 (en) * | 2019-08-07 | 2021-02-11 | 江苏时代新能源科技有限公司 | Secondary battery and battery pack |
| US11482755B2 (en) | 2019-08-07 | 2022-10-25 | Jiangsu Contemporary Amperex Technology Limited | Secondary battery and battery pack |
| CN113302777A (en) * | 2019-12-04 | 2021-08-24 | 宁德时代新能源科技股份有限公司 | Electrode assembly, method of molding electrode assembly, production system for electrode assembly, secondary battery, battery module, and device |
| CN113302777B (en) * | 2019-12-04 | 2024-01-26 | 宁德时代新能源科技股份有限公司 | Electrode assembly, secondary battery, battery module, and apparatus |
| CN113871807A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Battery and battery pack |
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