CN105702906A - Electrochemical energy storage device - Google Patents
Electrochemical energy storage device Download PDFInfo
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- CN105702906A CN105702906A CN201410704791.6A CN201410704791A CN105702906A CN 105702906 A CN105702906 A CN 105702906A CN 201410704791 A CN201410704791 A CN 201410704791A CN 105702906 A CN105702906 A CN 105702906A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
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, particularly relate to a kind of electrochemical energy storage device。
Background technology
EV battery request charge-discharge magnification is big, fills requirement soon to meet, to save the charging interval；And meet put requirement soon, to improve the power of automobile。The fast charging and discharging function of battery, it is desirable to the internal resistance of battery is little, requires that the electric current density of battery is wanted uniformly, otherwise to cause the hot-spot of battery, there is potential safety hazard simultaneously。Battery industry reduces the internal resistance of battery usually by increasing electrode tabs quantity in the way of increasing electrode tabs group cross-sectional area。But electrode tabs quantity increases, electrode tabs being caused to manufacture processing difficulties, reduce as manufactured efficiency, cutting die cost increases；And during welding electrode lug group, manufacture processing difficulties, weld rosin joint, cross weldering。
Summary of the invention
In view of Problems existing in background technology, it is an object of the invention to provide a kind of electrochemical energy storage device, it can improve the filling soon of electrochemical energy storage device, fast exoergic power。
Another object of the present invention is to provide a kind of electrochemical energy storage device, it can improve the security performance of electrochemical energy storage device。
To achieve these goals, the invention provides a kind of electrochemical energy storage device, comprising: outer packing shell, there is opening；Top cover, is provided with the first electrode leading-out terminal and the second electrode leading-out terminal and for sealing the opening of outer packing shell；Battery core；And electrolyte, it is infused in the cavity that outer packing shell and top cover are formed and impregnates battery core。Battery core is placed in the cavity that outer packing shell and top cover are formed, including the first electrode plates, including the first electrode current collecting body and be arranged on the first electrode diaphragm containing the first electrode active material on the surface of the first electrode current collecting body；Multiple first electrode tabs, are respectively arranged at the part being not provided with the first electrode diaphragm of the first electrode current collecting body of the first electrode plates；Second electrode plates, including the second electrode current collecting body and be arranged on the surface of the second electrode current collecting body containing the second electrode diaphragm of the second electrode active material；Multiple second electrode tabs, are respectively arranged at the part being not provided with the second electrode diaphragm of the second electrode current collecting body of the second electrode plates；And isolating membrane, between the first electrode plates and the second electrode plates；Wherein, the first electrode plates, isolating membrane and the second electrode plates wind formation battery core successively。Wherein, after winding forms battery core, multiple first electrode tabs overlap composition least one set the first electrode tabs groups, multiple second electrode tabs overlap composition least one set the second electrode tabs groups；First electrode tabs group and the second electrode tabs group all take the shape of the letter U；Electrically connect with the first electrode leading-out terminal on top cover after the first electrode tabs group bending taken the shape of the letter U, electrically connect with the second electrode leading-out terminal on top cover after the second electrode tabs group bending taken the shape of the letter U。
Beneficial effects of the present invention is as follows:
Multiple first electrode tabs overlaps form the first electrode tabs group taken the shape of the letter U, multiple second electrode tabs overlap forms the second electrode tabs group, add width and the area of passage of the first electrode tabs and the second electrode tabs, thus reducing the internal resistance of battery core, and then reduce the resistance of electrochemical energy storage device, improve the charge-discharge magnification of electrochemical energy storage device, improve the filling soon of electrochemical energy storage device, fast exoergic power。The the first electrode tabs group taken the shape of the letter U and the second electrode tabs group make the distance of the transmission of electric current between the first electrode plates and the second electrode plates and the first electrode tabs and the second electrode tabs shorten, electric current density evenly, it can increase lug sectional area simultaneously, and then solve the problem of hot-spot in lug overflow process, improve the security performance of electrochemical energy storage device。
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the first electrode plates of the electrochemical energy storage device according to the present invention；
Fig. 2 is the schematic diagram of the second electrode plates of the electrochemical energy storage device according to the present invention；
Fig. 3 is the schematic diagram adopting first electrode plates of Fig. 1 and second electrode plates of Fig. 2 to wind the process forming battery core；
Fig. 4 is the schematic diagram after the electric core winding of Fig. 3；
Fig. 5 is the schematic diagram after the first electrode tabs group of the battery core of Fig. 4 and the bending of the second electrode tabs group；
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 the electrochemical energy storage device according to the present invention；
The top cover that Fig. 9 is Fig. 8 is provided with the first electrode leading-out terminal and the elevational schematic view of the second electrode leading-out terminal；
Figure 10 is the outer packing shell schematic diagram of the electrochemical energy storage device according to the present invention；
Figure 11 is the top cover of Fig. 8 and the outer packing shell of Figure 10 fit together after schematic diagram；
Figure 12 illustrates an embodiment of the electrochemical energy storage device according to Fig. 5 of the present invention, for clarity sake, omit outer packing shell and top cover, wherein (a) is the schematic diagram of the first electrode switching piece, b () is the schematic diagram of the second electrode switching piece, c () is the schematic diagram of the assembling of the first electrode switching piece and the second electrode switching piece and battery core, its first electrode switching piece shown in broken lines and second electrode switching piece；
Figure 13 illustrates an embodiment of the electrochemical energy storage device according to Fig. 5 of the present invention, for clarity sake, omit outer packing shell and top cover, wherein (a) is the schematic diagram of the first electrode switching piece, b () is the schematic diagram of the second electrode switching piece, c () is the schematic diagram of the assembling of the first electrode switching piece and the second electrode switching piece and battery core, its first electrode switching piece shown in broken lines and second electrode switching piece；
Figure 14 illustrates an embodiment of the electrochemical energy storage device according to the present invention, is wherein not provided with the first electrode switching piece and the second electrode switching piece, and for clarity sake, omits outer packing shell and top cover；
Figure 15 illustrates an embodiment of the electrochemical energy storage device according to Figure 14 of the present invention, for clarity sake, omit outer packing shell and top cover, wherein (a) is the schematic diagram of the first electrode switching piece, b () is the schematic diagram of the second electrode switching piece, c () is the schematic diagram of the assembling of the first electrode switching piece and the second electrode switching piece and battery core, its first electrode switching piece shown in broken lines and second electrode switching piece；
Figure 16 illustrates an embodiment of the electrochemical energy storage device according to Figure 14 of the present invention, for clarity sake, omit outer packing shell and top cover, wherein (a) is the schematic diagram of the first electrode switching piece, b () is the schematic diagram of the second electrode switching piece, c () is the schematic diagram of the assembling of the first electrode switching piece and the second electrode switching piece and battery core, its first electrode switching piece shown in broken lines and second electrode switching piece。
Figure 17 illustrates an embodiment of the electrochemical energy storage device according to Figure 14 of the present invention, for clarity sake, omit outer packing shell and top cover, wherein (a) is the schematic diagram of the first electrode switching piece, b () is the schematic diagram of the second electrode switching piece, c () is the schematic diagram of the assembling of the first electrode switching piece and the second electrode switching piece and battery core, its first electrode switching piece shown in broken lines and second electrode switching piece；
Figure 18 is the outer packing shell schematic diagram of the electrochemical energy storage device according to the corresponding diagram 14-17 of the present invention；
Figure 19 is the schematic top plan view of the top cover of the electrochemical energy storage device according to the corresponding diagram 14-17 of the present invention；
The top cover that Figure 20 is Figure 19 is provided with the first electrode leading-out terminal and the elevational schematic view of the second electrode leading-out terminal；
Figure 21 is the top cover of Figure 19 and the outer packing shell of Figure 18 fit together after schematic diagram。
Wherein, description of reference numerals is as follows:
1 outer packing shell 445 section of electrical connection
2 top cover 5 second electrode switching pieces
21 first electrode leading-out terminal 51 second upper pieces
22 second electrode leading-out terminal 511 second upper piece covering part
3 battery core 512 second upper piece connecting portions
31 first electrode plates 513 second upper piece buffer part
32 first electrode tabs 52 second lower pieces
33 second electrode plates 521 second lower piece covering part
34 second electrode tabs 522 second lower piece connecting portions
4 first electrode switching piece 523 second lower piece buffer part
The 41 first alone electrode switching pieces of upper piece 53
Covering part in 411 first upper piece covering part 531
412 first upper piece connecting portions 532 bend buffer part
413 first upper piece buffer part 533 times covering part
42 first lower piece 534 times bending buffer part
421 first lower piece covering part 535 electrical connection sections
422 first lower piece connecting portion 54 multiplexing electrode switching pieces
Overlay segment in 423 first lower piece buffer part 541
43 alone electrode switching pieces 542 bend breeze way
543 times overlay segments of covering part on 431
544 times bending breeze ways of buffer part are bent on 432
433 times covering part 545 sections of electrical connection
434 times bending buffer part 6 first electrode tabs groups
435 electrical connection section 61 first weld parts
44 multiplexing electrode switching piece 62 first buffer part
Overlay segment 7 second electrode tabs group on 441
Breeze way 71 second weld part is bent on 442
443 times overlay segment 72 second buffer part
444 times bending breeze ways
Detailed description of the invention
Describe the electrochemical energy storage device according to the present invention with reference to the accompanying drawings in detail。
Referring to figs. 1 through Figure 21, include according to the electrochemical energy storage device of the present invention: outer packing shell 1 (with reference to Figure 10 and Figure 18), there is opening (not marking)；Top cover 2 (with reference to Fig. 8-9 and Figure 19-20), is provided with the first electrode leading-out terminal 21 and the second electrode leading-out terminal 22 (with reference to Fig. 9 and Figure 20) and for sealing the opening (with reference to Figure 10 and Figure 18) of outer packing shell 1；Battery core 3；And electrolyte (not shown), it is infused in the cavity that outer packing shell 1 and top cover 2 are formed and impregnates battery core 3。Battery core 3 is placed in outer packing shell 1 interior with the cavity that top cover 2 is formed (with reference to Figure 11 and Figure 21), including the first electrode plates 31, including the first electrode current collecting body (not shown) and be arranged on the first electrode diaphragm (not shown) containing the first electrode active material on the surface of the first electrode current collecting body；Multiple first electrode tabs 32, are respectively arranged at the part being not provided with the first electrode diaphragm of the first electrode current collecting body of the first electrode plates 31；Second electrode plates 33, including the second electrode current collecting body (not shown) and be arranged on the surface of the second electrode current collecting body containing the second electrode diaphragm (not shown) of the second electrode active material；Multiple second electrode tabs 34, are respectively arranged at the part being not provided with the second electrode diaphragm of the second electrode current collecting body of the second electrode plates 33；And isolating membrane (not shown), between the first electrode plates 31 and the second electrode plates 33；Wherein, the first electrode plates 31, isolating membrane and the second electrode plates 33 wind formation battery core 3 successively。Wherein, after winding forms battery core 3, multiple first electrode tabs 32 overlapping composition least one set the first electrode tabs group 6, multiple second electrode tabs 34 overlapping composition least one set the second electrode tabs group 7；First electrode tabs group 6 and the second electrode tabs group 7 all take the shape of the letter U；Electrically connect with the first electrode leading-out terminal 21 on top cover 2 after the first electrode tabs group 6 bending taken the shape of the letter U, electrically connect with the second electrode leading-out terminal 22 on top cover 2 after the second electrode tabs group 7 bending taken the shape of the letter U。
The first electrode tabs group 6 that the overlapping composition of multiple first electrode tabs 32 takes the shape of the letter U, multiple second electrode tabs 34 overlapping composition the second electrode tabs group 7, add width and the area of passage of the first electrode tabs 32 and the second electrode tabs 34, thus reducing the internal resistance of battery core, and then reduce the resistance of electrochemical energy storage device, improve the charge-discharge magnification of electrochemical energy storage device, improve the filling soon of electrochemical energy storage device, fast exoergic power。The the first electrode tabs group 6 taken the shape of the letter U and the second electrode tabs group 7 make the distance of the transmission of electric current between the first electrode plates 31 and the second electrode plates 33 and the first electrode tabs 32 and the second electrode tabs 34 shorten, electric current density evenly, it can increase lug sectional area simultaneously, and then solve the problem of hot-spot in lug overflow process, improve the security performance of electrochemical energy storage device。
As depicted in figs. 1 and 2, utilize die cutting device or laser cutting device that the first electrode plates 31 and the second electrode plates 33 are processed to form multiple first electrode tabs 32 and multiple second electrode tabs 34 respectively。
As shown in Figure 3, successively the first electrode plates 31, isolating membrane, the second electrode plates 32, isolating membrane (omitting in figure) winding are formed battery core 3, and multiple first electrode tabs 32 form the first electrode tabs group 6, and multiple second electrode tabs 34 form the second electrode tabs group 7。
As shown in Figure 4, first electrode tabs group 6 and the second electrode tabs group 7 taken the shape of the letter U of different cross-sectional can be formed respectively by designing the width of the first electrode tabs 32 and the second electrode tabs 34。
In an embodiment of the electrochemical energy storage device according to the present invention, the two ends of the opening of the U-shaped of each first electrode tabs group 6 taken the shape of the letter U can concordant (with reference to Fig. 4) or not concordant before bending。
In an embodiment of the electrochemical energy storage device according to the present invention, the two ends of the opening of the U-shaped of each second electrode tabs group 7 taken the shape of the letter U can concordant (with reference to Fig. 4) or not concordant before bending。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Fig. 5 and Fig. 7, Figure 12 to Figure 16 and in conjunction with Fig. 9, each first electrode tabs group 6 can be formed: the first weld part 61, for making this first electrode tabs group 6 be welded in the first electrode leading-out terminal 21 on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Fig. 5 and Fig. 7, Figure 12 to Figure 13 and in conjunction with Fig. 9 and with reference to Figure 14 to Figure 17 and in conjunction with Figure 20, each second electrode tabs group 7 can be formed: the second weld part 71, for making this second electrode tabs group 7 be welded in the second electrode leading-out terminal 22 on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Fig. 5 and Fig. 7, Figure 12 to Figure 16 and in conjunction with Fig. 9 and with reference to Figure 14 to Figure 17 and in conjunction with Figure 20, at least one in each first electrode tabs group 6 and/or in each second electrode tabs group 7 is formed with buffer part, the buffer part being formed in the first electrode tabs group 6 is the first buffer part 62, and the buffer part being formed in the second electrode tabs group 7 is the second buffer part 72。First buffer part 62 is between the first weld part 61 and the first collector and comprises the bending part of this first electrode tabs group 6, for making this first electrode tabs group 6 be in non-fully tension after being welded in the first electrode leading-out terminal 21 at the first weld part 61, to alleviate the tensile failure to this first electrode tabs group 6 of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。Second buffer part 72 is between the second weld part 71 and the second collector and comprises the bending part of this first electrode tabs group 6, for making this second electrode tabs group 7 be in non-fully tension after being welded in the second electrode leading-out terminal 22 at the second weld part 71, to alleviate the tensile failure to this second electrode tabs group 7 of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, Figure 13, Figure 15, Figure 16 and Figure 17, described electrochemical energy storage device may also include that the first electrode switching piece 4, for the first electrode tabs group 6 being electrically connected with the first electrode leading-out terminal 21 on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, Figure 13, Figure 15, Figure 16 and Figure 17, described electrochemical energy storage device may also include that the second electrode switching piece 5, for the second electrode tabs group 7 being electrically connected with the second electrode leading-out terminal 22 on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, Figure 13, Figure 15, Figure 16 and Figure 17, described electrochemical energy storage device may also include that the first electrode switching piece 4, for the first electrode tabs group 6 being electrically connected with the first electrode leading-out terminal 21 on top cover 2；And the second electrode switching piece 5, for the second electrode tabs group 7 is electrically connected with the second electrode leading-out terminal 22 on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12 and Figure 13, the first electrode tabs group 6 can be one group, is positioned at one end of the top side of battery core 3；Second electrode tabs group 7 can be one group, is positioned at the other end of the top side of battery core 3。First electrode tabs group 6 and the second electrode tabs group 7 lay respectively at the two ends of the top side of battery core 3, can avoid the risk of short circuit between the first electrode tabs 32 and the second electrode tabs 34。At this it should be noted that top side and bottom side are all the positions that opposite first pole lug group 6 and the second electrode tabs group 7 are arranged on battery core 3。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12 and Figure 13, the first electrode switching piece 4 can cover the upper and lower surface of the first electrode tabs group 6 after bending。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, the first electrode switching piece 4 comprises the steps that the first upper piece 41, the upper surface of covering the first electrode tabs group 6 after electrically connecting corresponding bending；And first lower piece 42, cover and electrically connect the lower surface of the first electrode tabs group 6 after (directly or indirectly electrical connection) corresponding bending and first electrode leading-out terminal 21 that electrical connection (directly or indirectly electrical connection) is on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 13, the lower surface of the first upper piece 41 can cover and electrically connect the upper surface of the first electrode tabs group 6 after corresponding bending, and the first electrode leading-out terminal 21 that the upper surface electrical connection (such as, welding) of the first upper piece 41 is on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 13, the upper surface of the first lower piece 42 can cover and electrically connect the lower surface of the first electrode tabs group 6 after corresponding bending。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, the first upper piece 41 comprises the steps that the first upper piece covering part 411, the upper surface of covering the first electrode tabs group 6 after electrically connecting corresponding bending；First upper piece connecting portion 412, is electrically connected to the first electrode leading-out terminal 21 on top cover 2；And the first upper piece buffer part 413, it is connected between the first upper piece covering part 411 and the first upper piece connecting portion 412, for alleviating the tensile failure to first upper piece covering part the 411, first upper piece connecting portion 412 and this first electrode tabs group 6 of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, the first lower piece 42 comprises the steps that the first lower piece covering part 421, the lower surface of covering the first electrode tabs group 6 after electrically connecting corresponding bending；First lower piece connecting portion 422, is electrically connected to the first electrode leading-out terminal 21 on top cover 2；And the first lower piece buffer part 423, it is connected between the first lower piece covering part 421 and the first lower piece connecting portion 422, for alleviating the tensile failure to first lower piece covering part the 421, first lower piece connecting portion 422 and this first electrode tabs group 6 of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
In an embodiment of the electrochemical energy storage device according to the present invention, first upper piece 41 and the first lower piece 42 is bent to form by same sheet material and bending part can as buffer part, or the first upper piece 41 and the first lower piece 42 is each is formed (reference Figure 12 and Figure 13) by a piece of sheet material。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12 and Figure 13, the second electrode switching piece 5 can cover two surface up and down of the second electrode tabs group 7 after bending。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, the second electrode switching piece 5 comprises the steps that the second upper piece 51, the upper surface of covering the second electrode tabs group 7 after electrically connecting corresponding bending；And second lower piece 52, cover and electrically connect the lower surface of the second electrode tabs group 7 after (directly or indirectly electrical connection) bending and second electrode leading-out terminal 22 that electrical connection (directly or indirectly electrical connection) is on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 13, the lower surface of the second upper piece 51 can cover and electrically connect the upper surface of the second electrode tabs group 7 after corresponding bending, and the upper surface of the second upper piece 51 can electrically connect (such as, welding) second electrode leading-out terminal 22 on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 13, the upper surface of the second lower piece 52 can cover and electrically connect the lower surface of the second electrode tabs group 7 after corresponding bending。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, the second upper piece 51 comprises the steps that the second upper piece covering part 511, the upper surface of covering the second electrode tabs group 7 after electrically connecting corresponding bending；Second upper piece connecting portion 512, is electrically connected to the second electrode leading-out terminal 22 on top cover 2；And the second upper piece buffer part 513, it is connected between the second upper piece covering part 511 and the second upper piece connecting portion 512, for alleviating the tensile failure to second upper piece covering part the 511, second upper piece connecting portion 512 and this second electrode tabs group 7 of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 12, the second lower piece 52 comprises the steps that the second lower piece covering part 521, the lower surface of covering the second electrode tabs group 7 after electrically connecting corresponding bending；Second lower piece connecting portion 522, is electrically connected to the second electrode leading-out terminal 22 on top cover 2；And the second lower piece buffer part 523, it is connected between the second lower piece covering part 521 and the second lower piece connecting portion 522, for alleviating the tensile failure to second lower piece covering part the 521, second lower piece connecting portion 522 and this second electrode tabs group 7 of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
In an embodiment of the electrochemical energy storage device according to the present invention, second upper piece 51 and the second lower piece 52 are bent to form (Figure 13) and bending part by same sheet material can as buffer part, or the second upper piece 51 and the second lower piece 52 is each is formed (reference Figure 12) by a piece of sheet material。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 15 to Figure 17 and in conjunction with Figure 14 and Figure 18-21, the first electrode tabs group 6 can be two groups, lays respectively at the top side of battery core 3 and one end of bottom side；Second electrode tabs group 7 can be two groups, lays respectively at the top side of battery core 3 and the other end of bottom side。At this it should be noted that top side and bottom side are all the positions that opposite first pole lug group 6 and the second electrode tabs group 7 are arranged on battery core 3。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 17, the first electrode switching piece 4 comprises the steps that two alone electrode switching pieces 43, respectively corresponding two the first electrode tabs groups 6。Each alone electrode switching piece 43 comprises the steps that covering part 431, covers and electrically connect the upper surface of a corresponding first electrode tabs group 6；Upper bending buffer part 432, side is connected to covering part 431；Lower covering part 433, covers and electrically connects the lower surface of one the first electrode tabs group 6 of this correspondence；Lower bending buffer part 434, side is connected to lower covering part 433；And electrical connection section 435, both sides are connected to the opposite side of bending buffer part 432 and the opposite side of lower bending buffer part 434 and the first electrode leading-out terminal 21 being electrically connected on top cover 2。In one embodiment, the electrical connection section 435 of two alone electrode switching pieces 43 can be electrically connected or can not be electrically connected。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 15, the first electrode switching piece 4 comprises the steps that an alone electrode switching piece 43, a corresponding first electrode tabs group 6；And a multiplexing electrode switching piece 44。Alone electrode switching piece 43 comprises the steps that covering part 431, covers and electrically connect the upper surface of a corresponding first electrode tabs group 6；Upper bending buffer part 432, side is connected to covering part 431；Lower covering part 433, covers and electrically connects the lower surface of one the first electrode tabs group 6 of this correspondence；Lower bending buffer part 434, side is connected to lower covering part 433；And electrical connection section 435, both sides are connected to the opposite side of bending buffer part 432 and the opposite side of lower bending buffer part 434 and the first electrode leading-out terminal 21 being electrically connected on top cover 2。Multiplexing electrode switching piece 44 comprises the steps that overlay segment 441, covers and be electrical connectors be in the upper surface of the first electrode tabs group 6 of top 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 of the first electrode tabs group 6 of bottom side；Lower bending breeze way 444, side is connected to lower overlay segment 443；And electrical connection section 445, both sides are connected to the opposite side of bending breeze way 442 and the opposite side of lower bending breeze way 444 and the first electrode leading-out terminal 21 being electrically connected on top cover 2。Wherein, when alone electrode switching piece 43 is arranged at the first electrode tabs group 6 being in top side (referring to Figure 15), the upper overlay segment 441 of multiplexing electrode switching piece 44 covers and electrically connects the upper covering part 431 of alone electrode switching piece 43；When alone electrode switching piece 43 is arranged at the first electrode tabs group 6 being in bottom side (not shown go out), the lower overlay segment 443 of multiplexing electrode switching piece 44 covers and electrically connects the lower covering part 433 of alone electrode switching piece 43。In one embodiment, the electrical connection section 435 of alone electrode switching piece 43 is electrically coupleable to or can not be electrically connected to the electrical connection section 445 of multiplexing electrode switching piece 44。It should be noted that at this, when an alone electrode switching piece 43 is provided with upper bending buffer part 432 and lower bending buffer part 434, multiplexing electrode switching piece 44 can arrange and can also be not provided with bending breeze way 442 and/or lower bending breeze way 444, as long as multiplexing electrode switching piece 44 has enough length。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 16, the first electrode switching piece 4 can include a multiplexing electrode switching piece 44。Multiplexing electrode switching piece 44 comprises the steps that overlay segment 441, covers and be electrical connectors be in upper surface (Figure 16) or the lower surface of the first electrode tabs group 6 of top side；Upper bending breeze way 442, side is connected to overlay segment 441；Lower overlay segment 443, covers and is electrical connectors be in lower surface (Figure 16) or the upper surface of the first electrode tabs group 6 of bottom side；Lower bending breeze way 444, side is connected to lower overlay segment 443；And electrical connection section 445, both sides are connected to the opposite side of bending breeze way 442 and the opposite side of lower bending breeze way 444 and the first electrode leading-out terminal 21 being electrically connected on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 15, the second electrode switching piece 5 comprises the steps that two alone electrode switching pieces 53, respectively corresponding two the second electrode tabs groups 7。Each alone electrode switching piece 53 comprises the steps that covering part 531, covers and electrically connect the upper surface of a corresponding second electrode tabs group 7；Upper bending buffer part 532, side is connected to covering part 531；Lower covering part 533, covers and electrically connects the lower surface of one the second electrode tabs group 7 of this correspondence；Lower bending buffer part 534, side is connected to lower covering part 533；And electrical connection section 535, both sides are connected to the opposite side of bending buffer part 532 and the opposite side of lower bending buffer part 534 and the second electrode leading-out terminal 22 being electrically connected on top cover 2。In one embodiment, the electrical connection section 535 of two alone electrode switching pieces 53 can be electrically connected or can not be electrically connected, in other words, two alone electrode switching pieces 53 can be electrically connected to the second electrode leading-out terminal 22 on top cover 2 again after first linking together, or two alone electrode switching pieces 53 are each electrically connected to the second electrode leading-out terminal 22 on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 16, the second electrode switching piece 5 comprises the steps that an alone electrode switching piece 53, a corresponding second electrode tabs group 7；And a multiplexing electrode switching piece 54。Alone electrode switching piece 53 comprises the steps that covering part 531, covers and electrically connect the upper surface of a corresponding second electrode tabs group 7；Upper bending buffer part 532, side is connected to covering part 531；Lower covering part 533, covers and electrically connects the lower surface of one the second electrode tabs group 7 of this correspondence；Lower bending buffer part 534, side is connected to lower covering part 533；And electrical connection section 535, both sides are connected to the opposite side of bending buffer part 532 and the opposite side of lower bending buffer part 534 and the second electrode leading-out terminal 22 being electrically connected on top cover 2。Multiplexing electrode switching piece 54 comprises the steps that overlay segment 541, covers and be electrical connectors be in the upper surface of the second electrode tabs group 7 of top 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 of the second electrode tabs group 7 of bottom side；Lower bending breeze way 544, side is connected to lower overlay segment 543；And electrical connection section 545, both sides are connected to the opposite side of bending breeze way 542 and the opposite side of lower bending breeze way 544 and the second electrode leading-out terminal 22 being electrically connected on top cover 2。Wherein, when alone electrode switching piece 53 is arranged at the second electrode tabs group 7 being in top side (referring to Figure 16), the upper overlay segment 541 of multiplexing electrode switching piece 54 covers and electrically connects the upper covering part 531 of alone electrode switching piece 53；When alone electrode switching piece 53 is arranged at the second electrode tabs group 7 being in bottom side (not shown go out), the lower overlay segment 543 of multiplexing electrode switching piece 54 covers and electrically connects the lower covering part 533 of alone electrode switching piece 53。In one embodiment, the electrical connection section 535 of alone electrode switching piece 53 is electrically coupleable to or can not be electrically connected to the electrical connection section 545 of multiplexing electrode switching piece 54。It should be noted that at this, when an alone electrode switching piece 53 is provided with upper bending buffer part 532 and lower bending buffer part 534, multiplexing electrode switching piece 54 can arrange and can also be not provided with bending breeze way 542 and/or lower bending breeze way 544, as long as multiplexing electrode switching piece 54 has enough length。
In an embodiment of the electrochemical energy storage device according to the present invention, with reference to Figure 17, the second electrode switching piece 5 can include a multiplexing electrode switching piece 54。Multiplexing electrode switching piece 54 comprises the steps that overlay segment 541, covers and be electrical connectors be in upper surface (Figure 17) or the lower surface of the second electrode tabs group 7 of top side；Upper bending breeze way 542, side is connected to overlay segment 541；Lower overlay segment 543, covers and is electrical connectors be in lower surface (Figure 17) or the upper surface of the second electrode tabs group 7 of bottom side；Lower bending breeze way 544, side is connected to lower overlay segment 543；And electrical connection section 545, both sides are connected to the opposite side of bending breeze way 542 and the opposite side of lower bending breeze way 544 and the second electrode leading-out terminal 22 being electrically connected on top cover 2。
In an embodiment of the electrochemical energy storage device according to the present invention, described electrochemical energy storage device can be lithium ion battery or capacitor。In one embodiment, the first electrode plates 31 can be anode pole piece or cathode pole piece, and correspondingly, the second electrode plates 33 can be cathode pole piece or anode pole piece。
Finally remark additionally, in the embodiment illustrated, for instance the direction instructions such as upper and lower, left and right, front and rear, top, the end are for relatively explaining the structure of different parts in the application and position relationship。When parts are in the position shown in figure, these instructions are appropriate。But, if the explanation of component locations changes, then the instruction of these directions also will correspondingly change。
Claims (10)
1. an electrochemical energy storage device, including:
Outer packing shell (1), has opening；
Top cover (2), is provided with the first electrode leading-out terminal (21) and the second electrode leading-out terminal (22) and is used for sealing the opening of outer packing shell (1)；
Battery core (3), is placed in the cavity that outer packing shell (1) and top cover (2) are formed, including:
First electrode plates (31), including the first electrode current collecting body and be arranged on the surface of the first electrode current collecting body containing the first electrode diaphragm of the first electrode active material；
Multiple first electrode tabs (32), are respectively arranged at the part being not provided with the first electrode diaphragm of the first electrode current collecting body of the first electrode plates (31)；
Second electrode plates (33), including the second electrode current collecting body and be arranged on the surface of the second electrode current collecting body containing the second electrode diaphragm of the second electrode active material；
Multiple second electrode tabs (34), are respectively arranged at the part being not provided with the second electrode diaphragm of the second electrode current collecting body of the second electrode plates (33)；And
Isolating membrane, is positioned between the first electrode plates (31) and the second electrode plates (33)；
Wherein, the first electrode plates (31), isolating membrane and the second electrode plates (33) wind formation battery core (3) successively；And
Electrolyte, is infused in the cavity that outer packing shell (1) and top cover (2) are formed and impregnates battery core (3)；
It is characterized in that,
After winding forms battery core (3), multiple first electrode tabs (32) overlapping composition least one set the first electrode tabs group (6), multiple second electrode tabs (34) overlapping composition least one set the second electrode tabs group (7)；
First electrode tabs group (6) and the second electrode tabs group (7) all take the shape of the letter U；
Electrically connect with the first electrode leading-out terminal (21) on top cover (2) after the first electrode tabs group (6) bending taken the shape of the letter U, electrically connect with the second electrode leading-out terminal (22) on top cover (2) after the second electrode tabs group (7) bending taken the shape of the letter U。
2. electrochemical energy storage device according to claim 1, it is characterised in that
Each first electrode tabs group (6) is formed:
First weld part (61), is used for making this first electrode tabs group (6) be welded in the first electrode leading-out terminal (21) on top cover (2)；
Each second electrode tabs group (7) is formed:
Second weld part (71), is used for making this second electrode tabs group (7) be welded in the second electrode leading-out terminal (22) on top cover (2)；And
At least one in each first electrode tabs group (6) and/or in each second electrode tabs group (7) is formed with buffer part, the buffer part being formed in the first electrode tabs group (6) is the first buffer part (62), and the buffer part being formed in the second electrode tabs group (7) is the second buffer part (72)；
First buffer part (62) is positioned between the first weld part (61) and the first collector and comprises the bending part of this first electrode tabs group (6), for making this first electrode tabs group (6) be in non-fully tension after being welded in the first electrode leading-out terminal (21) at the first weld part (61), to alleviate the tensile failure to this first electrode tabs group (6) of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration；
Second buffer part (72) is positioned between the second weld part (71) and the second collector and comprises the bending part of this first electrode tabs group (6), for making this second electrode tabs group (7) be in non-fully tension after being welded in the second electrode leading-out terminal (22) at the second weld part (71), to alleviate the tensile failure to this second electrode tabs group (7) of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
3. electrochemical energy storage device according to claim 1, it is characterised in that described electrochemical energy storage device also includes:
First electrode switching piece (4), for electrically connecting the first electrode tabs group (6) with the first electrode leading-out terminal (21) on top cover (2)；And/or
Second electrode switching piece (5), for electrically connecting the second electrode tabs group (7) with the second electrode leading-out terminal (22) on top cover (2)。
4. electrochemical energy storage device according to claim 3, it is characterised in that
First electrode tabs group (6) is one group, is positioned at one end of the top side of battery core (3)；
Second electrode tabs group (7) is one group, is positioned at the other end of the top side of battery core (3)。
5. electrochemical energy storage device according to claim 3, it is characterised in that
First electrode tabs group (6) is two groups, lays respectively at the top side of battery core (3) and one end of bottom side；
Second electrode tabs group (7) is two groups, lays respectively at the top side of battery core (3) and the other end of bottom side；
Whole first electrode tabs groups (6) cover by same first electrode switching piece (4) or by the first different electrode switching pieces (4)；
Whole second electrode tabs groups (7) are covered by same second electrode switching piece (5) or the second different electrode switching pieces (5)。
6. electrochemical energy storage device according to claim 4, it is characterised in that
First electrode switching piece (4) including:
First upper piece (41), the upper surface of covering the first electrode tabs group (6) after electrically connecting corresponding bending；And
First lower piece (42), the lower surface of covering the first electrode tabs group (6) after electrically connecting corresponding bending, and it is electrically connected to the first electrode leading-out terminal (21) on top cover (2)；Second electrode switching piece (5) including:
Second upper piece (51), the upper surface of covering the second electrode tabs group (7) after electrically connecting corresponding bending；And
Second lower piece (52), covers and electrically connects the lower surface of the second electrode tabs group (7) after bending, and be electrically connected to the second electrode leading-out terminal (22) on top cover (2)。
7. electrochemical energy storage device according to claim 6, it is characterised in that
First upper piece (41) including:
First upper piece covering part (411), the upper surface of covering the first electrode tabs group (6) after electrically connecting corresponding bending；
First upper piece connecting portion (412), is electrically connected to the first electrode leading-out terminal (21) on top cover (2)；And
First upper piece buffer part (413), it is connected between the first upper piece covering part (411) and the first upper piece connecting portion (412), for alleviating the tensile failure to the first upper piece covering part (411), the first upper piece connecting portion (412) and this first electrode tabs group (6) of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration；
First lower piece (42) including:
First lower piece covering part (421), the lower surface of covering the first electrode tabs group (6) after electrically connecting corresponding bending；
First lower piece connecting portion (422), is electrically connected to the first electrode leading-out terminal (21) on top cover (2)；And
First lower piece buffer part (423), it is connected between the first lower piece covering part (421) and the first lower piece connecting portion (422), for alleviating the tensile failure to the first lower piece covering part (421), the first lower piece connecting portion (422) and this first electrode tabs group (6) of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration；
Second upper piece (51) including:
Second upper piece covering part (511), the upper surface of covering the second electrode tabs group (7) after electrically connecting corresponding bending；
Second upper piece connecting portion (512), is electrically connected to the second electrode leading-out terminal (22) on top cover (2)；And
Second upper piece buffer part (513), it is connected between the second upper piece covering part (511) and the second upper piece connecting portion (512), for alleviating the tensile failure to the second upper piece covering part (511), the second upper piece connecting portion (512) and this second electrode tabs group (7) of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
Second lower piece (52) including:
Second lower piece covering part (521), the lower surface of covering the second electrode tabs group (7) after electrically connecting corresponding bending；
Second lower piece connecting portion (522), is electrically connected to the second electrode leading-out terminal (22) on top cover (2)；And
Second lower piece buffer part (523), it is connected between the second lower piece covering part (521) and the second lower piece connecting portion (522), for alleviating the tensile failure to the second lower piece covering part (521), the second lower piece connecting portion (522) and this second electrode tabs group (7) of the pulling force produced by described exterior vibration when described electrochemical energy storage device is subject to exterior vibration。
8. electrochemical energy storage device according to claim 5, it is characterised in that
First electrode switching piece (4) including:
Two alone electrode switching pieces (43), respectively corresponding two the first electrode tabs groups (6)；
Each alone electrode switching piece (43) including:
Upper covering part (431), covers and electrically connects the upper surface of a corresponding first electrode tabs group (6)；
Upper bending buffer part (432), side is connected to covering part (431)；
Lower covering part (433), covers and electrically connects the lower surface of one the first electrode tabs group (6) of this correspondence；
Lower bending buffer part (434), side is connected to lower covering part (433)；And
Electrical connection section (435), both sides are connected to the opposite side of bending buffer part (432) and the opposite side of lower bending buffer part (434) and the first electrode leading-out terminal (21) being electrically connected on top cover (2)；
Second electrode switching piece (5) including:
Two alone electrode switching pieces (53), respectively corresponding two the second electrode tabs groups (7)；
Each alone electrode switching piece (53) including:
Upper covering part (531), covers and electrically connects the upper surface of a corresponding second electrode tabs group (7)；
Upper bending buffer part (532), side is connected to covering part (531)；
Lower covering part (533), covers and electrically connects the lower surface of one the second electrode tabs group (7) of this correspondence；
Lower bending buffer part (534), side is connected to lower covering part (533)；And
Electrical connection section (535), both sides are connected to the opposite side of bending buffer part (532) and the opposite side of lower bending buffer part (534) and the second electrode leading-out terminal (22) being electrically connected on top cover (2)。
9. electrochemical energy storage device according to claim 5, it is characterised in that
First electrode switching piece (4) including:
One alone electrode switching piece (43), a corresponding first electrode tabs group (6), alone electrode switching piece (43) including:
Upper covering part (431), covers and electrically connects the upper surface of a corresponding first electrode tabs group (6)；
Upper bending buffer part (432), side is connected to covering part (431)；
Lower covering part (433), covers and electrically connects the lower surface of one the first electrode tabs group (6) of this correspondence；
Lower bending buffer part (434), side is connected to lower covering part (433)；And
Electrical connection section (435), both sides are connected to the opposite side of bending buffer part (432) and the opposite side of lower bending buffer part (434) and the first electrode leading-out terminal (21) being electrically connected on top cover (2)；And
One multiplexing electrode switching piece (44), including:
Upper overlay segment (441), covers and is electrical connectors be in the upper surface of the first electrode tabs group (6) of top 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 of the first electrode tabs group (6) of bottom side；
Lower bending breeze way (444), side is connected to lower overlay segment (443)；And
Electrical connection section (445), both sides are connected to the opposite side of bending breeze way (442) and the opposite side of lower bending breeze way (444) and the first electrode leading-out terminal (21) being electrically connected on top cover (2)；
Wherein,
When alone electrode switching piece (43) is arranged at the first electrode tabs group (6) being in top side, the upper overlay segment (441) of multiplexing electrode switching piece (44) covers and electrically connects the upper covering part (431) of alone electrode switching piece (43)；
When alone electrode switching piece (43) is arranged at the first electrode tabs group (6) being in bottom side, the lower overlay segment (443) of multiplexing electrode switching piece (44) covers and electrically connects the lower covering part (433) of alone electrode switching piece (43)；
Second electrode switching piece (5) including:
One alone electrode switching piece (53), a corresponding second electrode tabs group (7), alone electrode switching piece (53) including:
Upper covering part (531), covers and electrically connects the upper surface of a corresponding second electrode tabs group (7)；
Upper bending buffer part (532), side is connected to covering part (531)；
Lower covering part (533), covers and electrically connects the lower surface of one the second electrode tabs group (7) of this correspondence；
Lower bending buffer part (534), side is connected to lower covering part (533)；And
Electrical connection section (535), both sides are connected to the opposite side of bending buffer part (532) and the opposite side of lower bending buffer part (534) and the second electrode leading-out terminal (22) being electrically connected on top cover (2)；And
One multiplexing electrode switching piece (54), including:
Upper overlay segment (541), covers and is electrical connectors be in the upper surface of the second electrode tabs group (7) of top 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 of the second electrode tabs group (7) of bottom side；
Lower bending breeze way (544), side is connected to lower overlay segment (543)；And
Electrical connection section (545), both sides are connected to the opposite side of bending breeze way (542) and the opposite side of lower bending breeze way (544) and the second electrode leading-out terminal (22) being electrically connected on top cover (2)；
Wherein,
When alone electrode switching piece (53) is arranged at the second electrode tabs group (7) being in top side, the upper overlay segment (541) of multiplexing electrode switching piece (54) covers and electrically connects the upper covering part (531) of alone electrode switching piece (53)；
When alone electrode switching piece (53) is arranged at the second electrode tabs group (7) being in bottom side, the lower overlay segment (543) of multiplexing electrode switching piece (54) covers and electrically connects the lower covering part (533) of alone electrode switching piece (53)。
10. electrochemical energy storage device according to claim 5, it is characterised in that
First electrode switching piece (4) including:
One multiplexing electrode switching piece (44), including:
Upper overlay segment (441), covers and is electrical connectors be in upper surface or the lower surface of the first electrode tabs group (6) of top side；
Upper bending breeze way (442), side is connected to overlay segment (441)；
Lower overlay segment (443), covers and is electrical connectors be in lower surface or the upper surface of the first electrode tabs group (6) of bottom side；
Lower bending breeze way (444), side is connected to lower overlay segment (443)；And
Electrical connection section (445), both sides are connected to the opposite side of bending breeze way (442) and the opposite side of lower bending breeze way (444) and the first electrode leading-out terminal (21) being electrically connected on top cover (2)。
Second electrode switching piece (5) including:
One multiplexing electrode switching piece (54), including:
Upper overlay segment (541), covers and is electrical connectors be in upper surface or the lower surface of the second electrode tabs group (7) of top side；
Upper bending breeze way (542), side is connected to overlay segment (541)；
Lower overlay segment (543), covers and is electrical connectors be in lower surface or the upper surface of the second electrode tabs group (7) of bottom side；
Lower bending breeze way (544), side is connected to lower overlay segment (543)；And
Electrical connection section (545), both sides are connected to the opposite side of bending breeze way (542) and the opposite side of lower bending breeze way (544) and the second electrode leading-out terminal (22) being electrically connected on top cover (2)。
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Effective date of registration: 20191216 Address after: 213300 No. 1000 North Avenue, Kunlun Street, Liyang City, Changzhou City, Jiangsu Province Patentee after: CONTEMPORARY AMPEREX TECHNOLOGY Ltd. (JIANGSU) Address before: 352100, Xingang Road, Ningde Town, Jiaocheng District, Fujian, 1 Patentee before: Contemporary Amperex Technology Co.,Ltd. |