CN105702906B - Electrochemical energy storage device - Google Patents
Electrochemical energy storage device Download PDFInfo
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- CN105702906B CN105702906B CN201410704791.6A CN201410704791A CN105702906B CN 105702906 B CN105702906 B CN 105702906B CN 201410704791 A CN201410704791 A CN 201410704791A CN 105702906 B CN105702906 B CN 105702906B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 90
- 238000005452 bending Methods 0.000 claims abstract description 110
- 238000002955 isolation Methods 0.000 claims abstract description 10
- 239000003792 electrolyte Substances 0.000 claims abstract description 4
- 230000000875 corresponding Effects 0.000 claims description 31
- 239000007772 electrode material Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 210000000188 Diaphragm Anatomy 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 27
- 230000005611 electricity Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000003111 delayed Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium Ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
Classifications
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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 provides an electrochemical energy storage device comprising: the electrode package comprises an outer package shell, a top cover provided with a first electrode leading-out terminal and a second electrode leading-out terminal, a battery cell and electrolyte. The battery cell comprises: a first electrode sheet comprising a first electrode current collector; a plurality of first electrode tabs, each disposed on a first electrode current collector; a second electrode sheet comprising a second electrode current collector; a plurality of second electrode tabs, each disposed on a second electrode current collector; and a separator. The first electrode pole piece, the isolation film and the second electrode pole piece are sequentially wound to form the battery cell. The plurality of first electrode lugs are overlapped to form at least one first electrode lug group, and the plurality of second electrode lugs are overlapped to form at least one second electrode lug group; the first electrode lug group and the second electrode lug group are both U-shaped; the U-shaped first electrode lug group is electrically connected with the first electrode leading-out terminal on the top cover after being bent, and the U-shaped second electrode lug group is electrically connected with the second electrode leading-out terminal on the top cover after being bent.
Description
Technical field
The present invention relates to energy storage device field more particularly to a kind of electrochemical energy storage devices.
Background technique
EV battery request charge-discharge magnification is big, to meet fast charge requirement, to save the charging time；And meets to put fastly and want
It asks, to improve the power of automobile.The fast charging and discharging function of battery, it is desirable that the internal resistance of battery wants small, while requiring the electric current of battery
Otherwise density uniformly can will cause the hot-spot of battery, there are security risks.Battery industry usually passes through increase electrode tabs
Quantity reduces the internal resistance of battery in a manner of increasing electrode tabs group cross-sectional area.But electrode tabs quantity increases, and can cause
Electrode tabs manufacture processing difficulties, if manufacture efficiency reduces, cutting die increased costs；And processing is manufactured when welding electrode tab group
Difficulty, welding rosin joint are crossed and are welded.
Summary of the invention
In view of the problems in the background art, the purpose of the present invention is to provide a kind of electrochemical energy storage device, energy
Improve fast charge, the fast exoergic power of electrochemical energy storage device.
Another object of the present invention is to provide a kind of electrochemical energy storage devices, can improve the peace of electrochemical energy storage device
Full performance.
To achieve the goals above, the present invention provides a kind of electrochemical energy storage devices comprising: outer packing shell has
Opening；Top cover is provided with first electrode leading-out terminal and second electrode leading-out terminal and the opening for sealing outer packing shell；Electricity
Core；And electrolyte, it is infused in outer packing shell and top cover is formed by cavity and impregnates battery core.Battery core be placed in outer packing shell with
Top cover is formed by cavity, comprising: first electrode pole piece, including first electrode collector and setting are in first electrode afflux
The first electrode diaphragm containing first electrode active material on the surface of body；Multiple first electrode tabs, are respectively set to first
The part for being not provided with first electrode diaphragm of the first electrode collector of electrode plates；Second electrode pole piece, including the second electricity
Pole collector and the second electrode diaphragm containing second electrode active material being arranged on the surface of second electrode collector；
Multiple second electrode tabs, be respectively set to the second electrode collector of second electrode pole piece is not provided with second electrode diaphragm
Part；And isolation film, between first electrode pole piece and second electrode pole piece；Wherein, first electrode pole piece, isolation film and
Second electrode pole piece successively winds and forms battery core.Wherein, after winding forms battery core, multiple first electrode tab overlapping compositions are extremely
Few one group of first electrode tab group, multiple second electrode tab overlappings form at least one set of second electrode tab group；First electrode
Tab group and second electrode tab group are in U-shape；Draw after the first electrode tab group bending being in U-shape with the first electrode on top cover
Terminal is electrically connected out, is electrically connected after the second electrode tab group bending being in U-shape with the second electrode leading-out terminal on top cover.
Beneficial effects of the present invention are as follows:
First electrode tab group, the multiple second electrode tab overlapping groups that multiple first electrode tab overlapping compositions are in U-shape
At second electrode tab group, the width and area of passage of first electrode tab and second electrode tab are increased, to reduce electricity
The internal resistance of core, and then reduce the resistance of electrochemical energy storage device, the charge-discharge magnification of raising electrochemical energy storage device, raising electrification
Learn fast charge, the fast exoergic power of energy storage device.The first electrode tab group and second electrode tab group being in U-shape make first electrode pole piece
And second electrode pole piece shortens at a distance from electric current transmission between first electrode tab and second electrode tab, current density is more equal
It is even, while it can increase tab sectional area, and then solve the problems, such as hot-spot in tab overflow process, improve electrochemical energy storage
The security performance of device.
Detailed description of the invention
Fig. 1 is the schematic diagram of the first electrode pole piece of electrochemical energy storage device according to the present invention；
Fig. 2 is the schematic diagram of the second electrode pole piece of electrochemical energy storage device according to the present invention；
Fig. 3 is the signal that the process of battery core is formed using the first electrode pole piece of Fig. 1 and the second electrode pole piece coiling of Fig. 2
Figure；
Fig. 4 is the schematic diagram after the electric core winding of Fig. 3；
The first electrode tab group and the schematic diagram after the bending of second electrode tab group that Fig. 5 is the battery core of Fig. 4；
Fig. 6 is another angle schematic diagram of Fig. 4；
Fig. 7 is another angle schematic diagram of Fig. 5；
Fig. 8 is the schematic top plan view of the top cover of electrochemical energy storage device according to the present invention；
Fig. 9 is that the top cover of Fig. 8 is provided with the elevational schematic view of first electrode leading-out terminal and second electrode leading-out terminal；
Figure 10 is the outer packing shell schematic diagram of electrochemical energy storage device according to the present invention；
Figure 11 be Fig. 8 top cover and Figure 10 outer packing shell fit together after schematic diagram；
Figure 12 shows an embodiment of electrochemical energy storage device shown in fig. 5 according to the present invention, for clarity, omits
Outer packing shell and top cover, wherein (a) is the schematic diagram of first electrode switching piece, it (b) is the schematic diagram of second electrode switching piece,
(c) for first electrode switching piece and second electrode switching piece and battery core assembling schematic diagram, first electrode shown in dotted line
Switching piece and second electrode switching piece；
Figure 13 shows an embodiment of electrochemical energy storage device shown in fig. 5 according to the present invention, for clarity, omits
Outer packing shell and top cover, wherein (a) is the schematic diagram of first electrode switching piece, it (b) is the schematic diagram of second electrode switching piece,
(c) for first electrode switching piece and second electrode switching piece and battery core assembling schematic diagram, first electrode shown in dotted line
Switching piece and second electrode switching piece；
Figure 14 shows an embodiment of electrochemical energy storage device according to the present invention, wherein being not provided with first electrode switching
Piece and second electrode switching piece, and for clarity, omit outer packing shell and top cover；
Figure 15 shows an embodiment of electrochemical energy storage device shown in Figure 14 according to the present invention, for clarity, saves
Slightly outer packing shell and top cover, wherein (a) is the schematic diagram of first electrode switching piece, it (b) is the schematic diagram of second electrode switching piece,
(c) for first electrode switching piece and second electrode switching piece and battery core assembling schematic diagram, first electrode shown in dotted line
Switching piece and second electrode switching piece；
Figure 16 shows an embodiment of electrochemical energy storage device shown in Figure 14 according to the present invention, for clarity, saves
Slightly outer packing shell and top cover, wherein (a) is the schematic diagram of first electrode switching piece, it (b) is the schematic diagram of second electrode switching piece,
(c) for first electrode switching piece and second electrode switching piece and battery core assembling schematic diagram, first electrode shown in dotted line
Switching piece and second electrode switching piece.
Figure 17 shows an embodiment of electrochemical energy storage device shown in Figure 14 according to the present invention, for clarity, saves
Slightly outer packing shell and top cover, wherein (a) is the schematic diagram of first electrode switching piece, it (b) is the schematic diagram of second electrode switching piece,
(c) for first electrode switching piece and second electrode switching piece and battery core assembling schematic diagram, first electrode shown in dotted line
Switching piece and second electrode switching piece；
Figure 18 is the outer packing shell schematic diagram of electrochemical energy storage device shown in corresponding diagram 14-17 according to the present invention；
Figure 19 is the schematic top plan view of the top cover of electrochemical energy storage device shown in corresponding diagram 14-17 according to the present invention；
Figure 20 is that the top cover of Figure 19 is provided with the elevational schematic view of first electrode leading-out terminal and second electrode leading-out terminal；
Figure 21 be Figure 19 top cover and Figure 18 outer packing shell fit together after schematic diagram.
Wherein, the reference numerals are as follows:
1 outer packing shell 445 is electrically connected section
2 top cover, 5 second electrode switching piece
21 first electrode leading-out terminal, 51 second upper piece
22 second electrode leading-out terminal, 511 second upper piece covering part
3 battery core, 512 second upper piece interconnecting piece
31 first electrode pole piece, 513 second upper piece buffer part
32 first electrode tab, 52 second lower piece
33 second electrode pole piece, 521 second lower piece covering part
34 second electrode tab, 522 second lower piece interconnecting piece
4 first electrode switching piece, 523 second lower piece buffer part
Electrode switching piece is applied alone in 41 first upper pieces 53
Covering part in 411 first upper piece covering parts 531
Buffer part is bent on 412 first upper piece interconnecting pieces 532
The lower covering part of 413 first upper piece buffer parts 533
42 first lower pieces 534 are lower to bend buffer part
421 first lower piece covering part, 535 electrical connection section
422 first lower piece interconnecting pieces 54 are multiplexed electrode switching piece
Overlay segment in 423 first lower piece buffer parts 541
43 are applied alone on electrode switching piece 542 and bend breeze way
The lower overlay segment of covering part 543 on 431
The lower bending breeze way of buffer part 544 is bent on 432
433 lower covering parts 545 are electrically connected section
434 lower bending 6 first electrode tab groups of buffer part
435 electrical connection section, 61 first weld part
44 multiplexing 62 first buffer parts of electrode switching piece
7 second electrode tab group of overlay segment on 441
71 second weld part of breeze way is bent on 442
443 lower 72 second buffer parts of overlay segment
444 lower bending breeze ways
Specific embodiment
It is described in detail electrochemical energy storage device according to the present invention with reference to the accompanying drawings.
Referring to figs. 1 to Figure 21, electrochemical energy storage device according to the present invention include: outer packing shell 1 (referring to Fig.1 0 and figure
18), there is opening (not shown)；Top cover 2 (referring to Fig. 8-9 and Figure 19-20) is provided with first electrode leading-out terminal 21 and the
Two electrode leading-out terminals 22 (referring to Fig. 9 and Figure 20) and the opening (0 and Figure 18 referring to Fig.1) for being used to seal outer packing shell 1；Electricity
Core 3；And electrolyte (not shown), it is infused in outer packing shell 1 and top cover 2 is formed by cavity and impregnates battery core 3.Battery core 3
It is placed in outer packing shell 1 and top cover 2 is formed by cavity (1 and Figure 21 referring to Fig.1), comprising: first electrode pole piece 31, including the
One electrode current collecting body (not shown) and be arranged on the surface of first electrode collector containing first electrode active material
First electrode diaphragm (not shown)；Multiple first electrode tabs 32 are respectively set to the first electrode afflux of first electrode pole piece 31
The part for being not provided with first electrode diaphragm of body；Second electrode pole piece 33, including second electrode collector (not shown) and
The second electrode diaphragm (not shown) containing second electrode active material on the surface of second electrode collector is set；It is multiple
Second electrode tab 34, be respectively set to the second electrode collector of second electrode pole piece 33 is not provided with second electrode diaphragm
Part；And isolation film (not shown), between first electrode pole piece 31 and second electrode pole piece 33；Wherein, first electrode
Pole piece 31, isolation film and second electrode pole piece 33 successively wind and form battery core 3.Wherein, after winding forms battery core 3, Duo Ge
The overlapping of one electrode tabs 32 forms at least one set of first electrode tab group 6, the multiple overlapping of second electrode tab 34 compositions at least one
Group second electrode tab group 7；First electrode tab group 6 and second electrode tab group 7 are in U-shape；The first electrode tab being in U-shape
Be electrically connected after 6 bending of group with the first electrode leading-out terminal 21 on top cover 2, after the bending of the second electrode tab group 7 that is in U-shape with top
Second electrode leading-out terminal 22 on lid 2 is electrically connected.
Multiple overlappings of first electrode tab 32 form the first electrode tab group 6 being in U-shape, multiple 34 weights of second electrode tab
It is stacked second electrode tab group 7, increases the width and area of passage of first electrode tab 32 and second electrode tab 34, from
And reduce the internal resistance of battery core, and then the charge-discharge magnification of the resistance of reduction electrochemical energy storage device, raising electrochemical energy storage device,
Improve fast charge, the fast exoergic power of electrochemical energy storage device.The first electrode tab group 6 and second electrode tab group 7 being in U-shape make
Between one electrode plates 31 and second electrode pole piece 33 and first electrode tab 32 and second electrode tab 34 electric current transmit away from
From shorten, current density more evenly, while it can increase tab sectional area, and then solve hot-spot in tab overflow process
Problem improves the security performance of electrochemical energy storage device.
As depicted in figs. 1 and 2, using die cutting device or laser cutting device respectively by first electrode pole piece 31 and the second electricity
The processing of pole pole piece 33 forms multiple first electrode tabs 32 and multiple second electrode tabs 34.
As shown in figure 3, successively by first electrode pole piece 31, isolation film, second electrode pole piece 32, isolation film (being omitted in figure)
Winding forms battery core 3, and multiple first electrode tabs 32 form first electrode tab group 6, multiple 34 shapes of second electrode tab
At second electrode tab group 7.
As shown in figure 4, can be formed respectively not by the width of design first electrode tab 32 and second electrode tab 34
With the first electrode tab group 6 being in U-shape and second electrode tab group 7 of sectional area.
In an embodiment of electrochemical energy storage device according to the present invention, the U for each first electrode tab group 6 being in U-shape
It the both ends of the opening of shape can be concordant (referring to Fig. 4) or not concordant before bending.
In an embodiment of electrochemical energy storage device according to the present invention, the U for each second electrode tab group 7 being in U-shape
It the both ends of the opening of shape can be concordant (referring to Fig. 4) or not concordant before bending.
In an embodiment of electrochemical energy storage device according to the present invention, to Figure 16 and tied referring to Fig. 5 and Fig. 7, Figure 12
Fig. 9 is closed, each first electrode tab group 6 can be formed with: the first weld part 61, for making the first electrode tab group 6 be welded in top
First electrode leading-out terminal 21 on lid 2.
In an embodiment of electrochemical energy storage device according to the present invention, to Figure 13 and tied referring to Fig. 5 and Fig. 7, Figure 12
Close Fig. 9 and referring to Fig.1 4 to Figure 17 and combine Figure 20, each second electrode tab group 7 can be formed with: the second weld part 71 is used
In making the second electrode tab group 7 be welded in the second electrode leading-out terminal 22 on top cover 2.
In an embodiment of electrochemical energy storage device according to the present invention, to Figure 16 and tied referring to Fig. 5 and Fig. 7, Figure 12
It closes Fig. 9 and referring to Fig.1 4 to Figure 17 and combines Figure 20, in each first electrode tab group 6 and/or each second electrode tab group 7
At least one of be formed with buffer part, being formed in buffer part in first electrode tab group 6 is the first buffer part 62, is formed in
Buffer part in second electrode tab group 7 is the second buffer part 72.First buffer part 62 is located at the first weld part 61 and the first collection
Between fluid and include the first electrode tab group 6 bending part, draw for being welded in first electrode in the first weld part 61
Make after terminal 21 the first electrode tab group 6 be in non-fully tension out, with the electrochemical energy storage device by
Alleviate tensile failure of the pulling force caused by the exterior vibration to the first electrode tab group 6 when to exterior vibration.Second is slow
Portion 72 is rushed between the second weld part 71 and the second collector and includes the bending part of the first electrode tab group 6, is used for
The second electrode tab group 7 is in non-fully to tense
State, with alleviate when the electrochemical energy storage device is by exterior vibration pulling force caused by the exterior vibration to this second
The tensile failure of electrode tabs group 7.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, Figure 13, Figure 15, Figure 16 and
Figure 17, the electrochemical energy storage device may also include that first electrode switching piece 4, be used for first electrode tab group 6 and top cover 2
On first electrode leading-out terminal 21 be electrically connected.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, Figure 13, Figure 15, Figure 16 and
Figure 17, the electrochemical energy storage device may also include that second electrode switching piece 5, be used for second electrode tab group 7 and top cover 2
On second electrode leading-out terminal 22 be electrically connected.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, Figure 13, Figure 15, Figure 16 and
Figure 17, the electrochemical energy storage device may also include that first electrode switching piece 4, be used for first electrode tab group 6 and top cover 2
On first electrode leading-out terminal 21 be electrically connected；And second electrode switching piece 5, it is used for second electrode tab group 7 and top cover 2
On second electrode leading-out terminal 22 be electrically connected.
In an embodiment of electrochemical energy storage device according to the present invention, 2 and Figure 13 referring to Fig.1, first electrode tab
Group 6 can be one group, positioned at one end of the top side of battery core 3；Second electrode tab group 7 can be one group, positioned at the another of the top side of battery core 3
One end.First electrode tab group 6 and second electrode tab group 7 are located at the both ends of the top side of battery core 3, can avoid first electrode
Short-circuit risk between tab 32 and second electrode tab 34.It should be noted that top side and bottom side are opposite first
Electrode tabs group 6 and second electrode tab group 7 are arranged in for the position of battery core 3.
In an embodiment of electrochemical energy storage device according to the present invention, 2 and Figure 13, first electrode are transferred referring to Fig.1
Piece 4 can cover the upper and lower surfaces of the first electrode tab group 6 after bending.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, first electrode switching piece 4 can wrap
It includes: the first upper piece 41, the upper surface of first electrode tab group 6 for covering and being electrically connected after corresponding bending；And under first
Sheet body 42 covers and is electrically connected the lower surface of the first electrode tab group 6 after (directly or indirectly electrical connection) is bent accordingly, and
Electrical connection (directly or indirectly electrical connection) is in the first electrode leading-out terminal 21 on top cover 2.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 3, the following table of the first upper piece 41
The upper surface of first electrode tab group 6 that face can cover and be electrically connected after corresponding bending, and the upper surface of the first upper piece 41
Electrical connection (for example, welding) is in the first electrode leading-out terminal 21 on top cover 2.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 3, the upper table of the first lower piece 42
The lower surface of first electrode tab group 6 that face can cover and be electrically connected after corresponding bending.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, the first upper piece 41 can include:
First upper piece covering part 411, the upper surface of first electrode tab group 6 for covering and being electrically connected after corresponding bending；On first
Sheet body interconnecting piece 412, the first electrode leading-out terminal 21 being electrically connected on top cover 2；And the first upper piece buffer part 413, even
Connect between the first upper piece covering part 411 and the first upper piece interconnecting piece 412, for the electrochemical energy storage device by
Alleviate pulling force caused by the exterior vibration when exterior vibration to the first upper piece covering part 411, the first upper piece interconnecting piece
412 and the first electrode tab group 6 tensile failure.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, the first lower piece 42 can include:
First lower piece covering part 421, the lower surface of first electrode tab group 6 for covering and being electrically connected after corresponding bending；Under first
Sheet body interconnecting piece 422, the first electrode leading-out terminal 21 being electrically connected on top cover 2；And the first lower piece buffer part 423, even
Connect between the first lower piece covering part 421 and the first lower piece interconnecting piece 422, for the electrochemical energy storage device by
Alleviate pulling force caused by the exterior vibration when exterior vibration to the first lower piece covering part 421, the first lower piece interconnecting piece
422 and the first electrode tab group 6 tensile failure.
In an embodiment of electrochemical energy storage device according to the present invention, the first upper piece 41 and the first lower piece 42 by
Same sheet material is bent to form and bending part can be used as buffer part or the first upper piece 41 and the first lower piece 42 respectively by a piece of
A sheet material forms (2 and Figure 13 referring to Fig.1).
In an embodiment of electrochemical energy storage device according to the present invention, 2 and Figure 13, second electrode are transferred referring to Fig.1
Piece 5 can cover the upper and lower surfaces of the second electrode tab group 7 after bending.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, second electrode switching piece 5 can wrap
It includes: the second upper piece 51, the upper surface of second electrode tab group 7 for covering and being electrically connected after corresponding bending；And under second
Sheet body 52, covers and is electrically connected the lower surface of the second electrode tab group 7 after (directly or indirectly electrical connection) is bent, and is electrically connected
(directly or indirectly electrical connection) is in the second electrode leading-out terminal 22 on top cover 2.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 3, the following table of the second upper piece 51
The upper surface of second electrode tab group 7 that face can cover and be electrically connected after corresponding bending, and the upper surface of the second upper piece 51
(for example, welding) can be electrically connected in the second electrode leading-out terminal 22 on top cover 2.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 3, the upper table of the second lower piece 52
The lower surface of second electrode tab group 7 that face can cover and be electrically connected after corresponding bending.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, the second upper piece 51 can include:
Second upper piece covering part 511, the upper surface of second electrode tab group 7 for covering and being electrically connected after corresponding bending；On second
Sheet body interconnecting piece 512, the second electrode leading-out terminal 22 being electrically connected on top cover 2；And the second upper piece buffer part 513, even
Connect between the second upper piece covering part 511 and the second upper piece interconnecting piece 512, for the electrochemical energy storage device by
Alleviate pulling force caused by the exterior vibration when exterior vibration to the second upper piece covering part 511, the second upper piece interconnecting piece
512 and the second electrode tab group 7 tensile failure.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 2, the second lower piece 52 can include:
Second lower piece covering part 521, the lower surface of second electrode tab group 7 for covering and being electrically connected after corresponding bending；Under second
Sheet body interconnecting piece 522, the second electrode leading-out terminal 22 being electrically connected on top cover 2；And the second lower piece buffer part 523, even
Connect between the second lower piece covering part 521 and the second lower piece interconnecting piece 522, for the electrochemical energy storage device by
Alleviate pulling force caused by the exterior vibration when exterior vibration to the second lower piece covering part 521, the second lower piece interconnecting piece
522 and the second electrode tab group 7 tensile failure.
In an embodiment of electrochemical energy storage device according to the present invention, the second upper piece 51 and the second lower piece 52 by
Same sheet material is bent to form (Figure 13) and bending part can be used as buffer part or the second upper piece 51 and the second lower piece 52 is each
(referring to Fig.1 2) are formed by a piece of a sheet material.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 5 to Figure 17 and combine Figure 14 and
Figure 18-21, first electrode tab group 6 can be two groups, be located at the top side of battery core 3 and one end of bottom side；Second electrode tab
Group 7 can be two groups, be located at the top side of battery core 3 and the other end of bottom side.It should be noted that top side and bottom side are
Opposite first pole tab group 6 and second electrode tab group 7 are arranged in for the position of battery core 3.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 7, first electrode switching piece 4 can wrap
Include: two are applied alone electrode switching piece 43, respectively correspond two first electrode tab groups 6.Electrode switching piece 43 is respectively applied alone can include:
Upper covering part 431 covers and is electrically connected the upper surface of a corresponding first electrode tab group 6；Upper bending buffer part 432, side
It is connected to covering part 431；Lower covering part 433 covers and is electrically connected the lower surface of one first electrode tab group 6 of the correspondence；
Lower bending buffer part 434, side are connected to lower covering part 433；And electrical connection section 435, it is slow that two sides are connected to bending
Rush the other side in portion 432 and the other side of lower bending buffer part 434 and the first electrode leading-out terminal being electrically connected on top cover 2
21.In one embodiment, two are applied alone the electrical connection section 435 of electrode switching piece 43 that can be electrically connected or can not be connected electrically in
Together.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 5, first electrode switching piece 4 can wrap
Include: one is applied alone electrode switching piece 43, a corresponding first electrode tab group 6；An and multiplexing electrode switching piece 44.It is applied alone
Electrode switching piece 43 can include: upper covering part 431 covers and be electrically connected the upper surface of a corresponding first electrode tab group 6；On
Buffer part 432 is bent, side is connected to covering part 431；Lower covering part 433 covers and is electrically connected one first electricity of the correspondence
The lower surface of pole tab group 6；Lower bending buffer part 434, side are connected to lower covering part 433；And electrical connection section 435, two sides
It is connected to the other side of bending buffer part 432 and the other side of lower bending buffer part 434 and is electrically connected on top cover 2
First electrode leading-out terminal 21.It is multiplexed electrode switching piece 44 can include: upper overlay segment 441 covers and is electrical connectors be in top side
The upper surface of first electrode tab group 6；Upper bending breeze way 442, side is connected to overlay segment 441；Lower overlay segment 443, covers
Cover and be electrical connectors be in the lower surface of the first electrode tab group 6 of bottom side；Lower bending breeze way 444, side is connected to lower covering
Section 443；And electrical connection section 445, two sides are connected to the other side for bending breeze way 442 and lower bending breeze way 444
The other side and the first electrode leading-out terminal 21 that is electrically connected on top cover 2.Wherein, when being applied alone electrode switching piece 43 to be set to place
(referring to Figure 15) when the first electrode tab group 6 of top side, the upper overlay segment 441 of multiplexing electrode switching piece 44 is covered and is electrically connected
The upper covering part 431 of electrode switching piece 43 is applied alone；When being applied alone electrode switching piece 43 to be set to the first electrode tab in bottom side
When group 6 (not shown go out), the lower overlay segment 443 of multiplexing electrode switching piece 44, which is covered and is electrically connected, to be applied alone under electrode switching piece 43
Covering part 433.In one embodiment, the electrical connection section 435 of electrode switching piece 43 is applied alone to be electrically coupleable to or can not be electrically connected to
It is multiplexed the electrical connection section 445 of electrode switching piece 44.It should be noted that being applied alone electrode switching piece 43 to be provided with when one
When bending buffer part 432 and lower bending buffer part 434, multiplexing electrode switching piece 44, which can be set to be not provided with bending, to be delayed
Section 442 and/or lower bending breeze way 444 are rushed, as long as multiplexing electrode switching piece 44 has enough length.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 6, first electrode switching piece 4 can wrap
Include a multiplexing electrode switching piece 44.It is multiplexed electrode switching piece 44 can include: upper overlay segment 441 covers and is electrical connectors be in top
The upper surface (Figure 16) or lower surface of the first electrode tab group 6 of side；Upper bending breeze way 442, side is connected to overlay segment
441；Lower overlay segment 443 covers and is electrical connectors be in the lower surface (Figure 16) or upper surface of the first electrode tab group 6 of bottom side；
Lower bending breeze way 444, side are connected to lower overlay segment 443；And electrical connection section 445, it is slow that two sides are connected to bending
Rush the other side of section 442 and the other side of lower bending breeze way 444 and the first electrode leading-out terminal being electrically connected on top cover 2
21。
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 5, second electrode switching piece 5 can wrap
Include: two are applied alone electrode switching piece 53, respectively correspond two second electrode tab groups 7.Electrode switching piece 53 is respectively applied alone can include:
Upper covering part 531 covers and is electrically connected the upper surface of a corresponding second electrode tab group 7；Upper bending buffer part 532, side
It is connected to covering part 531；Lower covering part 533 covers and is electrically connected the lower surface of one second electrode tab group 7 of the correspondence；
Lower bending buffer part 534, side are connected to lower covering part 533；And electrical connection section 535, it is slow that two sides are connected to bending
Rush the other side in portion 532 and the other side of lower bending buffer part 534 and the second electrode leading-out terminal being electrically connected on top cover 2
22.In one embodiment, two are applied alone the electrical connection section 535 of electrode switching piece 53 that can be electrically connected or can not be connected electrically in
Together, in other words, two be applied alone electrode switching piece 53 can first link together after be electrically connected to again on top cover 2 second
Electrode leading-out terminal 22 or two second electrode leading-out terminals for being applied alone electrode switching piece 53 to be respectively electrically connected on top cover 2
22。
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 6, second electrode switching piece 5 can wrap
Include: one is applied alone electrode switching piece 53, a corresponding second electrode tab group 7；An and multiplexing electrode switching piece 54.It is applied alone
Electrode switching piece 53 can include: upper covering part 531 covers and be electrically connected the upper surface of a corresponding second electrode tab group 7；On
Buffer part 532 is bent, side is connected to covering part 531；Lower covering part 533 covers and is electrically connected one second electricity of the correspondence
The lower surface of pole tab group 7；Lower bending buffer part 534, side are connected to lower covering part 533；And electrical connection section 535, two sides
It is connected to the other side of bending buffer part 532 and the other side of lower bending buffer part 534 and is electrically connected on top cover 2
Second electrode leading-out terminal 22.It is multiplexed electrode switching piece 54 can include: upper overlay segment 541 covers and is electrical connectors be in top side
The upper surface of second electrode tab group 7；Upper bending breeze way 542, side is connected to overlay segment 541；Lower overlay segment 543, covers
Cover and be electrical connectors be in the lower surface of the second electrode tab group 7 of bottom side；Lower bending breeze way 544, side is connected to lower covering
Section 543；And electrical connection section 545, two sides are connected to the other side for bending breeze way 542 and lower bending breeze way 544
The other side and the second electrode leading-out terminal 22 that is electrically connected on top cover 2.Wherein, when being applied alone electrode switching piece 53 to be set to place
(referring to Figure 16) when the second electrode tab group 7 of top side, the upper overlay segment 541 of multiplexing electrode switching piece 54 is covered and is electrically connected
The upper covering part 531 of electrode switching piece 53 is applied alone；When being applied alone electrode switching piece 53 to be set to the second electrode tab in bottom side
When group 7 (not shown go out), the lower overlay segment 543 of multiplexing electrode switching piece 54, which is covered and is electrically connected, to be applied alone under electrode switching piece 53
Covering part 533.In one embodiment, the electrical connection section 535 of electrode switching piece 53 is applied alone to be electrically coupleable to or can not be electrically connected to
It is multiplexed the electrical connection section 545 of electrode switching piece 54.It should be noted that being applied alone electrode switching piece 53 to be provided with when one
When bending buffer part 532 and lower bending buffer part 534, multiplexing electrode switching piece 54, which can be set to be not provided with bending, to be delayed
Section 542 and/or lower bending breeze way 544 are rushed, as long as multiplexing electrode switching piece 54 has enough length.
In an embodiment of electrochemical energy storage device according to the present invention, referring to Fig.1 7, second electrode switching piece 5 can wrap
Include a multiplexing electrode switching piece 54.It is multiplexed electrode switching piece 54 can include: upper overlay segment 541 covers and is electrical connectors be in top
The upper surface (Figure 17) or lower surface of the second electrode tab group 7 of side；Upper bending breeze way 542, side is connected to overlay segment
541；Lower overlay segment 543 covers and is electrical connectors be in the lower surface (Figure 17) or upper surface of the second electrode tab group 7 of bottom side；
Lower bending breeze way 544, side are connected to lower overlay segment 543；And electrical connection section 545, it is slow that two sides are connected to bending
Rush the other side of section 542 and the other side of lower bending breeze way 544 and the second electrode leading-out terminal being electrically connected on top cover 2
22。
In an embodiment of electrochemical energy storage device according to the present invention, the electrochemical energy storage device can be lithium ion
Battery or capacitor.In one embodiment, first electrode pole piece 31 can be anode pole piece or cathode pole piece, correspondingly, the second electricity
Pole pole piece 33 can be cathode pole piece or anode pole piece.
Finally remark additionally, in the embodiment illustrated, such as the side such as upper, lower, left, right, front and rear, top, bottom
To the structure and positional relationship that instruction is for relatively explaining different components in the application.When component is in position shown in figure
When setting, these instructions are appropriate.But if the explanation of component locations changes, these direction instructions also will
Correspondingly change.
Claims (10)
1. a kind of electrochemical energy storage device, comprising:
Outer packing shell (1) has opening；
Top cover (2) is provided with first electrode leading-out terminal (21) and second electrode leading-out terminal (22) and for sealing outer packing
The opening of shell (1)；
Battery core (3) is placed in outer packing shell (1) and top cover (2) and is formed by cavity, comprising:
Including first electrode collector and containing on the surface of first electrode collector is arranged in first electrode pole piece (31)
The first electrode diaphragm of first electrode active material；
Multiple first electrode tabs (32), be respectively set to the first electrode collector of first electrode pole piece (31) is not provided with
The part of one electrode diaphragm；
Including second electrode collector and containing on the surface of second electrode collector is arranged in second electrode pole piece (33)
The second electrode diaphragm of second electrode active material；
Multiple second electrode tabs (34), be respectively set to the second electrode collector of second electrode pole piece (33) is not provided with
The part of two electrode diaphragms；And
Isolation film, between first electrode pole piece (31) and second electrode pole piece (33)；
Wherein, first electrode pole piece (31), isolation film and second electrode pole piece (33) successively wind and form battery core (3)；And
Electrolyte is infused in outer packing shell (1) and top cover (2) and is formed by cavity and impregnates battery core (3)；
It is characterized in that,
After winding forms battery core (3), multiple first electrode tab (32) overlappings form at least one set of first electrode tab group
(6), multiple second electrode tab (34) overlappings form at least one set of second electrode tab group (7)；
First electrode tab group (6) and second electrode tab group (7) are in U-shape；
It is electrically connected after first electrode tab group (6) bending being in U-shape with the first electrode leading-out terminal (21) on top cover (2), is in U
It is electrically connected after second electrode tab group (7) bending of shape with the second electrode leading-out terminal (22) on top cover (2)；
In each first electrode tab group (6) and/or at least one of each second electrode tab group (7) is formed with buffer part, shape
It include the first electrode at being the first buffer part (62) and the first buffer part (62) in the buffer part in first electrode tab group (6)
The bending part of tab group (6), the buffer part being formed in second electrode tab group (7) is the second buffer part (72) and second is slow
Rush the bending part that portion (72) include the first electrode tab group (6).
2. electrochemical energy storage device according to claim 1, which is characterized in that
Each first electrode tab group (6) is formed with:
First weld part (61), for making the first electrode tab group (6) be welded in the first electrode leading-out terminal on top cover (2)
(21)；
Each second electrode tab group (7) is formed with:
Second weld part (71), for making the second electrode tab group (7) be welded in the second electrode leading-out terminal on top cover (2)
(22)；And
First buffer part (62) is between the first weld part (61) and the first collector, for welding in the first weld part (61)
The first electrode tab group (6) is made to be in non-fully tension after first electrode leading-out terminal (21), described
Alleviate pulling force caused by the exterior vibration when electrochemical energy storage device is by exterior vibration to the first electrode tab group (6)
Tensile failure；
Second buffer part (72) is between the second weld part (71) and the second collector, for welding in the second weld part (71)
The second electrode tab group (7) is made to be in non-fully tension after second electrode leading-out terminal (22), described
Alleviate pulling force caused by the exterior vibration when electrochemical energy storage device is by exterior vibration to the second electrode tab group (7)
Tensile failure.
3. electrochemical energy storage device according to claim 1, which is characterized in that the electrochemical energy storage device further include:
First electrode switching piece (4) is used for the first electrode leading-out terminal in first electrode tab group (6) and top cover (2)
(21) it is electrically connected；And/or
Second electrode switching piece (5) is used for the second electrode leading-out terminal in second electrode tab group (7) and top cover (2)
(22) it is electrically connected.
4. electrochemical energy storage device according to claim 3, which is characterized in that
First electrode tab group (6) is one group, is located at one end of the top side of battery core (3)；
Second electrode tab group (7) is one group, is located at the other end of the top side of battery core (3).
5. electrochemical energy storage device according to claim 3, which is characterized in that
First electrode tab group (6) is two groups, is located at the top side of battery core (3) and one end of bottom side；
Second electrode tab group (7) is two groups, is located at the top side of battery core (3) and the other end of bottom side；
Whole first electrode tab groups (6) by same first electrode switching piece (4) or by different first electrode switching pieces (4) into
Row covering；
Whole second electrode tab groups (7) are carried out by same second electrode switching piece (5) or different second electrode switching pieces (5)
Covering.
6. electrochemical energy storage device according to claim 4, which is characterized in that
First electrode switching piece (4) includes:
First upper piece (41), the upper surface of first electrode tab group (6) for covering and being electrically connected after corresponding bending；And
First lower piece (42), the lower surface of first electrode tab group (6) for covering and being electrically connected after corresponding bending, and be electrically connected
The first electrode leading-out terminal (21) being connected on top cover (2)；
Second electrode switching piece (5) includes:
Second upper piece (51), the upper surface of second electrode tab group (7) for covering and being electrically connected after corresponding bending；And
Second lower piece (52), the lower surface of second electrode tab group (7) for covering and being electrically connected after bending, and is electrically connected to top
Cover the second electrode leading-out terminal (22) on (2).
7. electrochemical energy storage device according to claim 6, which is characterized in that
First upper piece (41) includes:
First upper piece covering part (411), the upper table of first electrode tab group (6) for covering and being electrically connected after corresponding bending
Face；
First upper piece interconnecting piece (412), the first electrode leading-out terminal (21) being electrically connected on top cover (2)；And
First upper piece buffer part (413) is connected to the first upper piece covering part (411) and the first upper piece interconnecting piece (412)
Between, for alleviating pulling force caused by the exterior vibration when the electrochemical energy storage device is by exterior vibration to first
The tensile failure of upper piece covering part (411), the first upper piece interconnecting piece (412) and the first electrode tab group (6)；
First lower piece (42) includes:
First lower piece covering part (421), the following table of first electrode tab group (6) for covering and being electrically connected after corresponding bending
Face；
First lower piece interconnecting piece (422), the first electrode leading-out terminal (21) being electrically connected on top cover (2)；And
First lower piece buffer part (423) is connected to the first lower piece covering part (421) and the first lower piece interconnecting piece (422)
Between, for alleviating pulling force caused by the exterior vibration when the electrochemical energy storage device is by exterior vibration to first
The tensile failure of lower piece covering part (421), the first lower piece interconnecting piece (422) and the first electrode tab group (6)；
Second upper piece (51) includes:
Second upper piece covering part (511), the upper table of second electrode tab group (7) for covering and being electrically connected after corresponding bending
Face；
Second upper piece interconnecting piece (512), the second electrode leading-out terminal (22) being electrically connected on top cover (2)；And
Second upper piece buffer part (513) is connected to the second upper piece covering part (511) and the second upper piece interconnecting piece (512)
Between, for alleviating pulling force caused by the exterior vibration when the electrochemical energy storage device is by exterior vibration to second
The tensile failure of upper piece covering part (511), the second upper piece interconnecting piece (512) and the second electrode tab group (7)；
Second lower piece (52) includes:
Second lower piece covering part (521), the following table of second electrode tab group (7) for covering and being electrically connected after corresponding bending
Face；
Second lower piece interconnecting piece (522), the second electrode leading-out terminal (22) being electrically connected on top cover (2)；And
Second lower piece buffer part (523) is connected to the second lower piece covering part (521) and the second lower piece interconnecting piece (522)
Between, for alleviating pulling force caused by the exterior vibration when the electrochemical energy storage device is by exterior vibration to second
The tensile failure of lower piece covering part (521), the second lower piece interconnecting piece (522) and the second electrode tab group (7).
8. electrochemical energy storage device according to claim 5, which is characterized in that first electrode switching piece (4) includes:
Two are applied alone electrode switching piece (43), respectively correspond two first electrode tab groups (6)；
Respectively it is applied alone the electrode switching piece (43) to include:
Upper covering part (431) covers and is electrically connected the upper surface of a corresponding first electrode tab group (6)；
Upper bending buffer part (432), side are connected to covering part (431)；
Lower covering part (433), covers and is electrically connected the lower surface of one first electrode tab group (6) of the correspondence；
Lower bending buffer part (434), side are connected to lower covering part (433)；And
Electrical connection section (435), two sides are connected to the other side for bending buffer part (432) and lower bending buffer part (434)
The other side and the first electrode leading-out terminal (21) that is electrically connected on top cover (2)；
Second electrode switching piece (5) includes:
Two are applied alone electrode switching piece (53), respectively correspond two second electrode tab groups (7)；
Respectively it is applied alone the electrode switching piece (53) to include:
Upper covering part (531) covers and is electrically connected the upper surface of a corresponding second electrode tab group (7)；
Upper bending buffer part (532), side are connected to covering part (531)；
Lower covering part (533), covers and is electrically connected the lower surface of one second electrode tab group (7) of the correspondence；
Lower bending buffer part (534), side are connected to lower covering part (533)；And
Electrical connection section (535), two sides are connected to the other side for bending buffer part (532) and lower bending buffer part (534)
The other side and the second electrode leading-out terminal (22) that is electrically connected on top cover (2).
9. electrochemical energy storage device according to claim 5, which is characterized in that
First electrode switching piece (4) includes:
One is applied alone electrode switching piece (43), a corresponding first electrode tab group (6), is applied alone the electrode switching piece (43) to include:
Upper covering part (431) covers and is electrically connected the upper surface of a corresponding first electrode tab group (6)；
Upper bending buffer part (432), side are connected to covering part (431)；
Lower covering part (433), covers and is electrically connected the lower surface of one first electrode tab group (6) of the correspondence；
Lower bending buffer part (434), side are connected to lower covering part (433)；And
Electrical connection section (435), two sides are connected to the other side for bending buffer part (432) and lower bending buffer part (434)
The other side and the first electrode leading-out terminal (21) that is electrically connected on top cover (2)；And
One multiplexing electrode switching piece (44), comprising:
Upper overlay segment (441) covers and is electrical connectors be in the upper surface of the first electrode tab group (6) of top side；
Upper bending breeze way (442), side are connected to overlay segment (441)；
Lower overlay segment (443) covers and is electrical connectors be in the lower surface of the first electrode tab group (6) of bottom side；
Lower bending breeze way (444), side are connected to lower overlay segment (443)；And
It is electrically connected section (445), two sides are connected to the other side for bending breeze way (442) and lower bending breeze way (444)
The other side and the first electrode leading-out terminal (21) that is electrically connected on top cover (2)；
Wherein,
When being applied alone electrode switching piece (43) to be set to the first electrode tab group (6) in top side, it is multiplexed electrode switching piece
(44) upper overlay segment (441) covers and is electrically connected the upper covering part (431) that electrode switching piece (43) is applied alone；
When being applied alone electrode switching piece (43) to be set to the first electrode tab group (6) in bottom side, it is multiplexed electrode switching piece
(44) lower overlay segment (443) covers and is electrically connected the lower covering part (433) that electrode switching piece (43) is applied alone；
Second electrode switching piece (5) includes:
One is applied alone electrode switching piece (53), a corresponding second electrode tab group (7), is applied alone the electrode switching piece (53) to include:
Upper covering part (531) covers and is electrically connected the upper surface of a corresponding second electrode tab group (7)；
Upper bending buffer part (532), side are connected to covering part (531)；
Lower covering part (533), covers and is electrically connected the lower surface of one second electrode tab group (7) of the correspondence；
Lower bending buffer part (534), side are connected to lower covering part (533)；And
Electrical connection section (535), two sides are connected to the other side for bending buffer part (532) and lower bending buffer part (534)
The other side and the second electrode leading-out terminal (22) that is electrically connected on top cover (2)；And
One multiplexing electrode switching piece (54), comprising:
Upper overlay segment (541) covers and is electrical connectors be in the upper surface of the second electrode tab group (7) of top side；
Upper bending breeze way (542), side are connected to overlay segment (541)；
Lower overlay segment (543) covers and is electrical connectors be in the lower surface of the second electrode tab group (7) of bottom side；
Lower bending breeze way (544), side are connected to lower overlay segment (543)；And
It is electrically connected section (545), two sides are connected to the other side for bending breeze way (542) and lower bending breeze way (544)
The other side and the second electrode leading-out terminal (22) that is electrically connected on top cover (2)；
Wherein,
When being applied alone electrode switching piece (53) to be set to the second electrode tab group (7) in top side, it is multiplexed electrode switching piece
(54) upper overlay segment (541) covers and is electrically connected the upper covering part (531) that electrode switching piece (53) is applied alone；
When being applied alone electrode switching piece (53) to be set to the second electrode tab group (7) in bottom side, it is multiplexed electrode switching piece
(54) lower overlay segment (543) covers and is electrically connected the lower covering part (533) that electrode switching piece (53) is applied alone.
10. electrochemical energy storage device according to claim 5, which is characterized in that
First electrode switching piece (4) includes:
One multiplexing electrode switching piece (44), comprising:
Upper overlay segment (441) covers and is electrical connectors be in the upper surface or lower surface of the first electrode tab group (6) of top side；
Upper bending breeze way (442), side are connected to overlay segment (441)；
Lower overlay segment (443) covers and is electrical connectors be in the lower surface or upper surface of the first electrode tab group (6) of bottom side；
Lower bending breeze way (444), side are connected to lower overlay segment (443)；And
It is electrically connected section (445), two sides are connected to the other side for bending breeze way (442) and lower bending breeze way (444)
The other side and the first electrode leading-out terminal (21) that is electrically connected on top cover (2)；
Second electrode switching piece (5) includes:
One multiplexing electrode switching piece (54), comprising:
Upper overlay segment (541) covers and is electrical connectors be in the upper surface or lower surface of the second electrode tab group (7) of top side；
Upper bending breeze way (542), side are connected to overlay segment (541)；
Lower overlay segment (543) covers and is electrical connectors be in the lower surface or upper surface of the second electrode tab group (7) of bottom side；
Lower bending breeze way (544), side are connected to lower overlay segment (543)；And
It is electrically connected section (545), two sides are connected to the other side for bending breeze way (542) and lower bending breeze way (544)
The other side and the second electrode leading-out terminal (22) that is electrically connected on top cover (2).
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| CN110739434A (en) * | 2018-07-20 | 2020-01-31 | 宁德新能源科技有限公司 | Utmost point ear, electric core and battery |
| WO2021258304A1 (en) * | 2020-06-23 | 2021-12-30 | 宁德新能源科技有限公司 | Battery, electronic device, and battery assembling method |
| WO2022051915A1 (en) * | 2020-09-08 | 2022-03-17 | 东莞新能安科技有限公司 | Electrode assembly, electrochemical device, and electronic device |
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| CN101542817A (en) * | 2007-03-12 | 2009-09-23 | 株式会社东芝 | Wound type electrode battery, and its manufacturing method |
| CN102983304A (en) * | 2012-12-27 | 2013-03-20 | 天津力神电池股份有限公司 | Polymer lithium ion battery |
| CN203415648U (en) * | 2013-09-12 | 2014-01-29 | 宁德新能源科技有限公司 | Cell and electrochemical energy storage device |
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|---|---|---|---|---|
| CN101542817A (en) * | 2007-03-12 | 2009-09-23 | 株式会社东芝 | Wound type electrode battery, and its manufacturing method |
| CN102983304A (en) * | 2012-12-27 | 2013-03-20 | 天津力神电池股份有限公司 | Polymer lithium ion battery |
| CN203415648U (en) * | 2013-09-12 | 2014-01-29 | 宁德新能源科技有限公司 | Cell and electrochemical energy storage device |
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