CN207690911U - Secondary cell and automobile - Google Patents
Secondary cell and automobile Download PDFInfo
- Publication number
- CN207690911U CN207690911U CN201820057020.6U CN201820057020U CN207690911U CN 207690911 U CN207690911 U CN 207690911U CN 201820057020 U CN201820057020 U CN 201820057020U CN 207690911 U CN207690911 U CN 207690911U
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- secondary cell
- insulating barrier
- lug
- connection part
- terminal connection
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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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- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
This application involves secondary cell and automobiles.Secondary cell includes cap assembly, and cap assembly includes electrode terminal；Electrode assembly, electrode assembly include battery core main body and the lug that extends from battery core main body；Switching piece, switching piece include the lug interconnecting piece being connect with lug and the terminal connection part being connect with electrode terminal；With the insulating barrier being set between battery core main body and switching piece, the insulating barrier is provided with the recess portion for accommodating the terminal connection part.When cap assembly and shell assemble, due to the presence of insulating barrier, even if under the action of extruding force, switching piece will not be with battery core body contact, more will not internal short-circuit be led to due to contact, which thereby enhance the safety of secondary cell, on the other hand, completely cut off partition board and is equipped with recess portion, the recess portion provides accommodating space for terminal connection part, it is possible thereby to reduce switching piece and occupied space inside secondary cell, the space can be used for increasing the size of battery core main body, improve the energy density 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
In the secondary battery, the lug of electrode assembly is connect by switching piece with electrode terminal, to realize in electrode assembly
The output of electric energy.
In order to improve the energy density of battery, the space for accommodating lug and switching piece be commonly designed it is smaller,
In the assembling process of secondary cell, switching piece is possible to be pressed into isolation film.When switching piece and positive oblique cut grafting or switching piece
When with cathode oblique cut grafting, short circuit can occur for secondary cell, and the safety of secondary cell reduces.
Utility model content
This application provides a kind of secondary cell and automobiles, it is intended to improve safety and the energy density of secondary cell.
This application provides a kind of secondary cells, including：
Cap assembly, including electrode terminal；
Electrode assembly, including battery core main body and the lug that extends from the battery core main body；
Switching piece includes the lug interconnecting piece being connect with the lug and the terminal being connect with electrode terminal connection
Portion；With
Insulating barrier is set between the battery core main body and the switching piece,
Wherein, the insulating barrier is provided with the recess portion for accommodating the terminal connection part.
Optionally, the switching piece further includes rake, and the terminal connection part extends along its length, and the lug connects
Socket part along its length towards far from the terminal connection part side extend, the rake relative to the terminal connection part to
On be obliquely installed,
The rake is connected between the lug interconnecting piece and the terminal connection part.
Optionally, the switching piece further includes fused area, and the fused area is set to the rake and the end
Between sub- interconnecting piece,
The secondary cell further includes the insulation holder for wrapping up the fused area, and the bottom surface of the recess portion is equipped with insulation
Holder holding area, being located at below the fused area for the insulation holder are partially accommodated in the insulation holder
Holding area.
Optionally, the lug include from the side of the insulating barrier around to the insulating barrier above connecting pin,
The connecting pin is connected to the lower surface of the lug interconnecting piece,
The connecting pin is set to by pressure between the insulating barrier and the lug interconnecting piece.
Optionally, the terminal connection part is adhesively fixed with the insulating barrier, the connecting pin and the insulating barrier
It is adhesively fixed.
Optionally, the rake is 120 °~160 ° relative to the angle of inclination of the terminal connection part.
Optionally, the insulation holder holding area is penetrated through logical to be formed along the thickness direction of the insulating barrier
Hole, the insulation holder are located at being partially accommodated in the through-hole below the fused area.
Optionally, the insulating barrier includes the locating flange being arranged in the periphery of the recess portion, and the locating flange is set
It is set to and limits the amount of movement of the terminal connection part in length direction and width direction respectively.
Optionally, the insulating barrier includes matrix face, and the recess portion is recessed from described matrix face, the locating flange from
It protrudes in described matrix face.
Present invention also provides a kind of automobiles, including secondary cell described in any one of the above embodiments.
Technical solution provided by the present application can reach following advantageous effect：
This application provides a kind of secondary cells, wherein insulating barrier is provided between switching piece and battery core main body, and
And insulating barrier is provided with the recess portion of accommodating terminal interconnecting piece.When cap assembly and shell assemble, due to depositing for insulating barrier
, even if under the action of extruding force, switching piece more will not will not lead to internal short-circuit with battery core body contact due to contact,
The safety of secondary cell is which thereby enhanced, on the other hand, isolation partition board is equipped with recess portion, which provides appearance for terminal connection part
Between emptying, it is possible thereby to reduce switching piece occupied space inside secondary cell, which can be used for increasing battery core master
The size of body, to improve the energy density of 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 the decomposition view of secondary cell provided by the embodiments of the present application；
Fig. 2 is the sectional view of secondary cell provided by the embodiments of the present application；
Fig. 3 is the vertical view of the first switching piece provided by the embodiments of the present application；
Fig. 4 is the sectional view of the first switching piece provided by the embodiments of the present application；
Fig. 5 is the stereogram of insulating component provided by the embodiments of the present application；
Fig. 6 is the sectional view of insulating component provided by the embodiments of the present application.
Reference numeral：
1000- secondary cells；
100- shells；
200- cap assemblies；
202- first electrode terminals；
204- second electrode terminals；
206- coping plates；
300- electrode assemblies；
302- battery core main bodys；
The first lugs of 304-；
The connecting pins 3040-；
The second lugs of 306-；
400- insulating films；
The first switching pieces of 500-；
502- lug interconnecting pieces；
504- terminal connection parts；
506- rakes；
The second switching pieces of 600-；
700- insulating barriers；
The first recess portions of 702-；
7020- insulation holder holding areas；
The second recess portions of 704-；
706- stomatas；
708- locating flanges；
710- matrixes face；
800- insulation holders；
802- wrapping portions；
804- isolated parts.
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.
It should be noted that the nouns of locality such as "upper", "lower", "left", "right" described in the embodiment of the present application are with attached drawing
Shown in angle come what is be described, should not be construed as the restriction to the embodiment of the present application.In addition, within a context, it is also necessary to
Understand, when mentioning an element and being connected to another element "upper" or "lower", can not only be connected directly between another
One element "upper" either "lower" can also be indirectly coupled to by intermediary element another element "upper" or " under.
It please refers to Fig.1 and Fig. 2, Fig. 1 shows the decomposition view of secondary cell, Fig. 2 shows the sectional views of secondary cell.
Secondary cell 1000 includes shell 100, secondary cell cap assembly 200 (hereinafter referred to as cap assembly), electrode group
Part 300 and insulating film 400.Wherein, electrode assembly 300 and insulating film 400 can be accommodated in shell by the opening of shell 100
In body 100, electrode assembly 300 is wrapped up by insulating film 400, and the opening of shell 100 can be sealed by cap assembly 200, head cover group
The contact portion of part 200 and shell 100 can be connected to each other for example, by welding.
Electrode assembly 300 is made by way of winding or laminating comprising the first pole piece, the second pole piece and for every
The partition board of the first pole piece and the second pole piece is opened, here, the first pole piece may be used as negative plate, and the second pole piece may be used as anode
Piece, vice versa.
First pole piece and the second pole piece include the coating coated portion of active material and being not coated with for uncoated active material
Part is covered, since the material of the active material coated by the first pole piece and the second pole piece is different so that the first pole piece and the second pole
Piece can have polarity different from each other.
For example, the first pole piece is negative plate, the active material coated by negative plate can be carbon or silicon.Second pole piece is just
Pole piece, the active material coated by positive plate can be LiFePO4, cobalt acid lithium and LiMn2O4 etc., the first pole piece and the second pole piece
Coated portion wind or laminate after form battery core main body 302, battery core main body 302 be the main part of storage electric energy, the first pole
The uncoated part of piece forms the first lug 304, and the uncoated part of the second pole piece forms the second lug 306, the first lug 304
It extends out respectively from the top of battery core main body 302 with the second lug 306.
Secondary cell 1000 further includes the first switching piece 500, the second switching piece 600 and insulating barrier 700, the first switching piece
500 and second switching piece 600 may be contained within the top of battery core main body 302.Wherein, the first switching piece 500 connects the first lug 304
With the first electrode terminal 202 of cap assembly 200, the second switching piece 600 connects the of the second lug 306 and cap assembly 200
Two electrode terminals 204.
Insulating barrier 700 is set to top and 600 liang of the first switching piece 500 and the second switching piece of battery core main body 302
The lower section of person, that is to say, that the first switching piece 500 and the second switching piece 600 by insulating barrier 700 and battery core main body 302 every
It opens, insulating barrier 700 can be arranged to rectangle strip structure, and length direction is consistent with the length direction of cap assembly 200
(directions x in Fig. 1).
According to above description, due to the presence of insulating barrier 700, when cap assembly 200 and the assembly of shell 100, i.e.,
Make under the squeezing action of assembly force, the first switching piece 500 and the second switching piece 600 will not be contacted with battery core main body 302, more
Will not internal short-circuit be led to due to contact, which thereby enhance the safety of secondary cell 1000.
It please refers to Fig.3 and Fig. 4, Fig. 3 shows that the vertical view of the first switching piece, Fig. 4 show the section view of the first switching piece
Figure.
First switching piece 500 includes the lug interconnecting piece 502 being connect with the first lug 304, connects with first electrode terminal 202
The rake 506 of the terminal connection part 504 and connecting tab interconnecting piece 502 and terminal connection part 504 that connect, that is to say, that pole
Ear interconnecting piece 502 and terminal connection part 504 extend from the both ends of rake 506 towards side away from each other respectively, lug connection
(directions x in Fig. 5) extends along its length for portion 502 and terminal connection part 504.
Rake 506 is obliquely installed upwards relative to terminal connection part 504, so that lug interconnecting piece 502 connects with terminal
Socket part 504 forms difference in height in the short transverse (directions z in Fig. 1) of secondary cell 1000, that is, lug interconnecting piece 502 is higher than
Terminal connection part 504.
According to an exemplary embodiment, rake 506 can be relative to the inclination angle alpha of terminal connection part 504
It is chosen in the range of 120 °~160 °.It is readily comprehensible, in the range of more than 90 °~180 °, with the increasing of inclination angle alpha
Greatly, lug interconnecting piece 502 and the difference in height of terminal connection part 504 can reduce therewith, and those skilled in the art can be according to first
The relative position of electrode terminal 202 and the first lug 304 flexibly chooses the value of α, and to improve secondary cell 1000 as far as possible
Premised on energy density.
As previously mentioned, the first lug 304 will be connect with lug interconnecting piece 502, still, due to the presence of insulating barrier 700,
First lug 304 can select to connect from the side of insulating barrier 700 with the first switching piece 500.Specifically, please continue to refer to figure
1, the first lug 304 include from the side of insulating barrier 700 around to insulating barrier 700 above connecting pin 3040, the connecting pin
3040 connect with the lower surface of lug interconnecting piece 502, such as weld.
Illustratively, the first lug 304 can be arranged to two parts, and the connecting pin 3040 of the first lug of two parts 304 can
With respectively from the two opposite sides of insulating barrier 700 around to the lower section of the first switching piece 500, and under lug interconnecting piece 502
Surface connects.
Further, connecting pin 3040 can also by the assembly force of secondary cell 1000 by pressure be set to insulating barrier 700 with
Between lug interconnecting piece 502, under the action of assembling pressure, connecting pin 3040 and the connection of lug interconnecting piece 502 are even closer
Reliably, the risk that the two is mutually disengaged can significantly reduce.
Above only for the connection of the first switching piece 500, the first lug 304 and the first switching piece and the first lug 304
Structure is described, it will be understood by those skilled in the art, however, that similar structure can be applied to the second switching piece 600
With the second lug 306, details are not described herein again.
With continued reference to FIG. 3, the first switching piece 500 further includes fused area, fused area has than the first switching piece 500
The smaller area of passage in other regions, fuse in the region when passing through high current so as to the first switching piece 500, fused area is molten
The overcharging state of secondary cell 1000 can be stopped by having no progeny, and improve safety when secondary cell 1000 overcharges.
Fused area can be formed by opening up fusing hole on the first switching piece 500, according to an illustrative implementation
Example, fused area can be set between rake 506 and terminal connection part 504.
When the first switching piece 500 will produce two parts of separation after fused area fuses, in order to ensure two after separation
Part is no longer in contact, and can also be insulated holder 800 in fused area outer cladding, insulation holder 800 can ensure point
Two parts from after are in insulation always.
Insulation holder 800 wrapping portion 802 being coated on outside fused area and the isolation being plugged in fusing hole
Part 804, wrapping portion 802 be used to avoid after fusing two parts for detaching due to deformation or it is sagging and in secondary cell 1000
Other electric conductors in portion are in electrical contact, and isolated part 804 is used for two parts of spaced-apart, two parts insulation are kept, with true
The overcharging state for protecting secondary cell 1000 is reliably stopped.
It is noted that fused area is set between rake 506 and terminal connection part 504, and fused area outsourcing
Insulation holder 800 is covered, this scheme can make insulation holder 800 be located at the occupied sky in part above fused area
Between for the idle space inside secondary cell 1000, improve the space availability ratio inside secondary cell 1000.
It is noted that fused area is not limited only to be set to the first switching piece 500, the second switching piece can also be set to
600, typically, fused area is arranged on the switching piece being connect with positive terminal.
Fig. 5 and Fig. 6 are please referred to, Fig. 5 shows that the stereogram of insulating barrier, Fig. 6 show the sectional view of insulating barrier.
Insulating barrier 700 include the first recess portion 702, the first recess portion 702 can with accommodating terminal interconnecting piece 504, so,
First recess portion 702 can provide accommodation space and be used for storing terminal connection part 504, in the short transverse of secondary cell 1000,
First recess portion 702 can be that electrode assembly 300 reserves segment space, which can be used for increasing the first pole piece, second
The size of pole piece, and then increase the size of battery core main body 302, improve the energy density of secondary cell 1000.
Insulating barrier 700 can also include the second recess portion 704, and the second recess portion 704 can be used for accommodating the second switching piece 600
Terminal connection part, the effect of the second recess portion 704 and the first recess portion 702 is essentially identical, and details are not described herein again.
Insulating barrier 700 further includes stomata 706 for gas to pass through, the stomata 706 with the explosion-proof valve on coping plate 206 just
It is right, smoothness when ensureing that gas sprays.
In order to reduce 800 occupied space of insulation holder, the first recess portion 702 includes insulation holder holding area
7020, insulation holder 800 is located at being partially accommodated in insulation holder holding area 7020 below fused area.
Further, insulation holder holding area 7020 can be penetrated through along the thickness direction of insulating barrier 700 to be formed
Through-hole, at this point, insulation holder 800 is located at being partially accommodated in the through-hole below fused area.The through-hole further increases
The big space of insulation holder holding area 7020, therefore, which can to insulate holder 800 in secondary cell
Less space is occupied in 1000 short transverse, in the case where 100 inner space of shell remains unchanged, can further be increased
The size of big battery core body 302, improves the energy density of secondary cell 1000.
It should be noted that, although insulating barrier 700 is penetrated through at insulation holder holding area 7020, but due to exhausted
Edge holder 800 is made of isolation material, with insulation performance, therefore the first switching piece 500 and battery core main body will not occur
The risk of 302 contacts.
The terminal connection part 504 being contained in the first recess portion 702 can be Nian Jie with insulating barrier 700, to keep the two phase
To fixation, relative displacement is reduced.Further, connecting pin 3040 can also be adhesively fixed with insulating barrier 700, so, the
One lug 304 and terminal connection part 504 can limit the degree of freedom of insulating barrier 700 jointly, so that it is guaranteed that insulating barrier 700 exists
The stability of position in secondary cell 1000.
As shown in figure 5, insulating barrier 700 further includes the locating flange 708 being arranged in the periphery of the first recess portion 702, positioning
Flange 708 is arranged to connect with width direction (directions y in Fig. 5) limitation terminal in length direction (directions x in Fig. 5) respectively
The amount of movement in portion 504." length direction " mentioned here refers to the length direction phase with the cap assembly of string configuration 200
Consistent direction, " width direction " mentioned here refer to the width direction phase one with the cap assembly of string configuration 200
The direction of cause.
Specifically, locating flange 708 towards between the inner wall and terminal connection part 504 of terminal connection part 504 there are compared with
Small fit clearance, the fit clearance enable terminal connection part 504 to be put into the first recess portion 702 and not will produce larger
Displacement, achieve the purpose that limit terminal connection part 504 displacement.
According to an exemplary embodiment, insulating barrier 700 includes matrix face 710, wherein the first recess portion 702 can be with
Recessed from matrix face 710, locating flange 708 is protruded from matrix face 710.The locating flange 708 protruded from matrix face 710 is higher than base
Dignity 710, at locating flange 708, the thickness of pole insulating barrier 700 is more than the size at other positions, and intensity obtains
It is promoted, can be that terminal connection part 504 provides relatively reliable limit.
It is readily comprehensible, locating flange can also be set in the periphery of the second recess portion 704, details are not described herein again.
Present invention also provides a kind of automobile, which includes the secondary cell 1000 described in any of the above-described embodiment.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of secondary cell, which is characterized in that including：
Cap assembly, including electrode terminal；
Electrode assembly, including battery core main body and the lug that extends from the battery core main body；
Switching piece includes the lug interconnecting piece being connect with the lug and the terminal connection part being connect with the electrode terminal；With
Insulating barrier is set between the battery core main body and the switching piece,
Wherein, the insulating barrier is provided with the recess portion for accommodating the terminal connection part.
2. secondary cell according to claim 1, which is characterized in that the switching piece further includes rake, the terminal
Interconnecting piece extends along its length, and the lug interconnecting piece extends towards the side far from the terminal connection part along its length,
The rake is obliquely installed upwards relative to the terminal connection part,
The rake is connected between the lug interconnecting piece and the terminal connection part.
3. secondary cell according to claim 2, which is characterized in that the switching piece further includes fused area, described molten
Disconnected region is set between the rake and the terminal connection part,
The secondary cell further includes the insulation holder for wrapping up the fused area, and the bottom surface of the recess portion is equipped with insulation and keeps
The insulation holder that is partially accommodated in of part holding area, the insulation holder being located at below the fused area houses
Region.
4. secondary cell according to claim 2, which is characterized in that the lug includes from the side of the insulating barrier
Connecting pin around to above the insulating barrier, the connecting pin are connected to the lower surface of the lug interconnecting piece,
The connecting pin is set to by pressure between the insulating barrier and the lug interconnecting piece.
5. secondary cell according to claim 4, which is characterized in that the terminal connection part is Nian Jie with the insulating barrier
Fixed, the connecting pin is adhesively fixed with the insulating barrier.
6. secondary cell according to claim 2, which is characterized in that the rake is relative to the terminal connection part
Angle of inclination is 120 °~160 °.
7. secondary cell according to claim 3, which is characterized in that the insulation holder holding area is along the insulation
The thickness direction of partition board is penetrated through to form through-hole, and the part of the insulation holder being located at below the fused area accommodates
In in the through-hole.
8. according to claim 1-7 any one of them secondary cells, which is characterized in that the insulating barrier includes being arranged in institute
The locating flange of the periphery of recess portion is stated, the locating flange is arranged to limit the terminal in length direction and width direction respectively
The amount of movement of interconnecting piece.
9. secondary cell according to claim 8, which is characterized in that the insulating barrier includes matrix face, the recess portion
Recessed from described matrix face, the locating flange is protruded from described matrix face.
10. a kind of automobile, which is characterized in that including such as claim 1-9 any one of them secondary cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820057020.6U CN207690911U (en) | 2018-01-12 | 2018-01-12 | Secondary cell and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820057020.6U CN207690911U (en) | 2018-01-12 | 2018-01-12 | Secondary cell and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207690911U true CN207690911U (en) | 2018-08-03 |
Family
ID=62990928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820057020.6U Active CN207690911U (en) | 2018-01-12 | 2018-01-12 | Secondary cell and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207690911U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428852A (en) * | 2018-01-12 | 2018-08-21 | 宁德时代新能源科技股份有限公司 | Secondary battery and automobile |
| WO2023178600A1 (en) * | 2022-03-24 | 2023-09-28 | 宁德时代新能源科技股份有限公司 | Current-collecting member, battery cell, battery and power consuming device |
-
2018
- 2018-01-12 CN CN201820057020.6U patent/CN207690911U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428852A (en) * | 2018-01-12 | 2018-08-21 | 宁德时代新能源科技股份有限公司 | Secondary battery and automobile |
| CN108428852B (en) * | 2018-01-12 | 2024-02-09 | 宁德时代新能源科技股份有限公司 | Secondary battery and automobile |
| WO2023178600A1 (en) * | 2022-03-24 | 2023-09-28 | 宁德时代新能源科技股份有限公司 | Current-collecting member, battery cell, battery and power consuming device |
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