CN202434631U - Differential pitch pole piece and power battery using same - Google Patents
Differential pitch pole piece and power battery using same Download PDFInfo
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- CN202434631U CN202434631U CN2012200496747U CN201220049674U CN202434631U CN 202434631 U CN202434631 U CN 202434631U CN 2012200496747 U CN2012200496747 U CN 2012200496747U CN 201220049674 U CN201220049674 U CN 201220049674U CN 202434631 U CN202434631 U CN 202434631U
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- pole piece
- protuberances
- barrier film
- pitch pole
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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 utility model discloses a differential pitch pole piece and a power battery using the same. The power battery comprises a battery core, a positioning cover, an aluminum cover and a shell, wherein the battery core is arranged in the shell; the positioning cover is arranged above the battery core; the aluminum cover is arranged above the positioning cover, and is fixedly connected with the shell; the battery core comprise a positive pole piece, a first diaphragm, a negative pole piece and a second diaphragm; and each of the positive and negative pole pieces is a differential pitch pole piece. The differential pitch pole piece comprises a coated part and an uncoated part above the coated part, wherein the uncoated part is punched at intervals to form a plurality of raised parts; the widths of all the raised parts are sequentially increased from front to back; intervals between every two adjacent raised parts are equal to are sequentially increased from front to back; and after the whole differential pitch pole piece is wound, all the raised parts are overlapped to form a tab, and the positive pole piece, the first diaphragm, the negative pole piece and the second diaphragm are neatly overlapped and wound to form the battery core. The structure and a process are simplified, the size is reduced, and the quality of the power battery is improved.
Description
[technical field]
The utility model relates to a kind of electrokinetic cell that differs from the pitch pole piece and adopt this pole piece.
[background technology]
Lug in the electrokinetic cell of producing generally is to adopt metal tape and pole piece to weld together at present, and welding needs a lot of welding equipments, and the fracture of lug is a common occurrence in welding process, and rosin joint once in a while also is to be difficult to control; Therefore, this welded product is complex technical process not only, and production efficiency is low; And current impedance is big, and product quality is difficult to control, therefore; The applicant has proposed the patent No. on May 7th, 2010: 201020184982.1, and name is called a kind of patent application of elliptic dynamic lithium ion battery, and this electrokinetic cell comprises housing, case top lid, housing bottom; Be provided with the volume core in the said housing, said case top lid is provided with positive terminal, negative terminal, and said volume core upper end is provided with the negative pole currect collecting circle corresponding with negative terminal; Said volume core lower end is provided with the anode collection circle corresponding with positive terminal, and the production process of the elliptic dynamic battery of this improvement structure is simple, and production efficiency obviously improves; And can lower the current impedance when discharging, have effect preferably, still; This structure is to establish the negative pole currect collecting circle corresponding with negative terminal in the upper end of volume core, establishes the anode collection circle corresponding with positive terminal in the lower end of volume core, and negative pole currect collecting circle and anode collection circle are connected on negative terminal and the positive terminal through negative pole brace and positive strap respectively again; This structure will be carried out afflux in the top and bottom of volume core respectively, and it is very big to take up room, and makes oval volume of battery very big; Thereby having influenced its application in a plurality of fields, and, still need be drawn out to behind the afflux of lower end on the pole of upper end; Structure is complicated, has also increased volume to a certain extent, though the positive terminal of part battery and the two ends that negative terminal lays respectively at the volume core are also arranged; But poor for applicability with applied environment of this battery, application is limited to very much, and battery is installed inconvenient on specific product.
[utility model content]
The purpose of the utility model solves the problems of the prior art exactly, proposes a kind of electrokinetic cell that differs from the pitch pole piece and adopt this pole piece, not only can reduce the elliptic dynamic volume of battery, and can simplified structure, improves product quality.
For realizing above-mentioned purpose; The utility model provides a kind of poor pitch pole piece that is used for electrokinetic cell, comprise coating portion and the uncoated portion that is positioned at coating portion top, the some protuberances of said uncoated portion's die-cut formation in interval; The width of all protuberances increases after by forward direction successively; Spacing between the two adjacent protuberances equates to increase successively after perhaps the spacing between the two adjacent protuberances is by forward direction, behind whole poor pitch pole piece coiling, and the overlapped formation lug of all protuberances.
For realizing above-mentioned purpose, the utility model has also proposed a kind of electrokinetic cell that adopts poor pitch pole piece, comprises electric core, location lid, aluminium lid and housing; Said electric core places in the said housing, and electric core top is provided with the location lid, and the side of covering, location is provided with aluminium lid; Said aluminium lid is fixedly connected with housing; Said electric core comprises positive plate, first barrier film, negative plate and second barrier film, and said positive plate and negative plate are poor pitch pole piece, and said poor pitch pole piece comprises coating portion and the uncoated portion that is positioned at coating portion top; The some protuberances of said uncoated portion's die-cut formation in interval; The width of all protuberances increases after by forward direction successively, the spacing between the two adjacent protuberances equate or two adjacent protuberances between spacing increase successively after by forward direction, behind whole poor pitch pole piece coiling; The overlapped formation lug of all protuberances, said positive plate, first barrier film, negative plate and second barrier film neatly stack the back coiling and form electric core.
As preferably, the width of said protuberance becomes arithmetic progression to increase after by forward direction successively, and the spacing between the two adjacent protuberances equates.
As preferably, the thickness of establishing positive plate, first barrier film, negative plate, second barrier film is respectively r1, r2, r3, r4, and the tolerance of said arithmetic progression is 2k π (r1+r2+r3+r4), wherein, and k >=1.
As preferably, the width of said protuberance becomes first arithmetic progression to increase after by forward direction successively, and the spacing between the two adjacent protuberances becomes second arithmetic progression to increase after by forward direction successively.
As preferably, the thickness of establishing positive plate, first barrier film, negative plate, second barrier film is respectively r1, r2, r3, r4, and the tolerance of said first arithmetic progression and second arithmetic progression is k π (r1+r2+r3+r4), wherein, and k >=1.
The beneficial effect of the utility model: the utility model adopts difference pitch pole piece, make positive plate, barrier film, negative plate stack the oval electric core of type of being wound into after, the protuberance of all positive plates is overlapped at a position formation anode ear; The protuberance of all negative plates is overlapped to form negative electrode lug a position, and this lug and pole piece are structure as a whole, and internal resistance is very little; The battery rapid heat dissipation, and anode ear and negative electrode lug all be positioned at the top of electric core, not only saved the space of electrokinetic cell; Reduced volume; And anode ear is very convenient with being connected of anode and cathode terminals with negative electrode lug, can adopt modes such as screw, riveted joint directly to connect, and not only simplifies the structure and technology; And avoided occurring phenomenons such as rosin joint and disconnected lug, thereby improved the quality of electrokinetic cell.
Characteristic of the utility model and advantage will combine accompanying drawing to be elaborated through embodiment.
[description of drawings]
Fig. 1 is the die-cut sketch map of difference pitch pole piece embodiment one in the utility model;
Fig. 2 is the coiling sketch map of difference pitch pole piece embodiment one in the utility model;
Fig. 3 is the die-cut sketch map of difference pitch pole piece embodiment two in the utility model;
Fig. 4 is the coiling sketch map of difference pitch pole piece embodiment two in the utility model;
Fig. 5 is the structural representation of the utility model medium power battery;
Fig. 6 is the structural representation of the aluminium lid of the utility model medium power battery;
Fig. 7 is the A-A cutaway view of Fig. 6.
[embodiment]
Embodiment one:
Like Fig. 1, shown in 2, be used for the poor pitch pole piece of electrokinetic cell, comprise coating portion and the uncoated portion that is positioned at coating portion top, the some protuberances of said uncoated portion's die-cut formation in interval; The width of all protuberances becomes after by forward direction arithmetic progression to increase successively, and the spacing between the two adjacent protuberances equates, behind whole poor pitch pole piece coiling, and the overlapped formation lug of all protuberances; If the thickness of positive plate, first barrier film, negative plate, second barrier film is respectively r1, r2, r3, r4, the tolerance of said arithmetic progression is 2k π (r1+r2+r3+r4), wherein, and k>=1; Under the theory state, fit when reeling fully, k should equal 1; In actual winding process, because the difference of elasticity, k can be slightly larger than 1; Certainly, be the effect that guarantees to reel, the scope of adjustment factor k is generally 1≤k≤1.2.Behind whole poor pitch pole piece coiling, the overlapped formation lug of all protuberances.Aforesaid lug is the monopole ear structure, processes more convenient.Aforesaid poor pitch pole piece comprises positive plate and negative plate, and die-cut lug is symmetrically distributed after being wound into electric core on positive plate and the negative plate, and distribution is connected with positive terminal, negative terminal.To the die-cut employing cutting die cross cutting of the protuberance that forms lug or adopt laser cutting, cutting accurately, efficient is high.Pole piece earlier spacing as shown in Figure 1 carries out die-cutly, and a is the width (that is: the width of lug) of first protuberance among the figure, and the protuberance width becomes arithmetic progression to increase after by forward direction successively; The tolerance of arithmetic progression is x, x=2k π (r1+r2+r3+r4), wherein; 1≤k≤1.2, b is the spacing between the two adjacent protuberances, has just formed structure shown in Figure 2 through reeling after the die-cut like this completion; All protuberances overlap fully, form lug, and positive plate, first barrier film, negative plate, the mutual integral body of second barrier film are reeled after stacking; Thereby form independently anode ear and negative electrode lug on the top of pole piece, the coexist structure on pole piece top of anode ear and negative electrode lug has been simplified the structure of battery; Reduced volume, made things convenient for and being connected of anode and cathode terminals.
Like Fig. 5,6, shown in 7, electrokinetic cell comprises that electric core 2, location cover 3, aluminium lid 4 and housing 1; Said electric core 2 places in the said housing 1, and electric core 2 tops are provided with the location and cover 3, and the location is covered 3 tops and is provided with aluminium lid 4; Said aluminium lid 4 is fixedly connected with housing 1, and said electric core 2 comprises positive plate, first barrier film, negative plate and second barrier film, and said positive plate and negative plate are poor pitch pole piece; Difference pitch pole piece comprises coating portion and uncoated portion, and said uncoated portion is the some protuberances of die-cut formation at interval, the width of all protuberances by forward direction after increase successively; Spacing between the two adjacent protuberances equates; Behind whole poor pitch pole piece coiling, the overlapped formation lug of all protuberances, said positive plate, first barrier film, negative plate and second barrier film neatly stack the back coiling and form electric core 2; Electricity core 2 can place in the aluminum metal case, also can place and form electrokinetic cell in the external packings such as stainless steel casing, plastic casing, aluminum-plastic composite membrane.Like Fig. 6 and shown in Figure 7, the edge ring of said aluminium lid 4 is provided with a circle crimping 41, and said aluminium lid 4 welds together through the inwall of said crimping 41 with said housing 1, this sound construction, and processing technology is simple.The anode ear of aforementioned structure and negative electrode lug can both neatly overlap preposition after reeling; Be convenient to be connected with the anode and cathode terminals of battery; Ways of connecting is after overlapping anode ear and negative electrode lug are put in order respectively, to go out an aperture therebetween, directly is connected with the anode and cathode terminals of battery with screw; Perhaps directly adopt riveted structure to be connected, can also adopt Welding Structure to be connected with the anode and cathode terminals of battery with the anode and cathode terminals of battery.Therefore, the neat overlapping extreme ear structure that this poor pitch forms is applicable to multiple connected mode; Not only the product internal resistance is very little; The battery rapid heat dissipation, and simplify the structure and technology, the volume of electrokinetic cell reduced; Avoid occurring phenomenons such as rosin joint and disconnected lug, thereby improved the quality and the production efficiency of electrokinetic cell.
Embodiment two:
Like Fig. 3, shown in 4, be used for the poor pitch pole piece of electrokinetic cell, comprise coating portion and uncoated portion; Said uncoated portion is the some protuberances of die-cut formation at interval, and the width of all protuberances becomes first arithmetic progression to increase after by forward direction successively, and the spacing between the two adjacent protuberances becomes second arithmetic progression to increase after by forward direction successively; Behind whole poor pitch pole piece coiling, the overlapped formation lug of all protuberances, the thickness of establishing positive plate, first barrier film, negative plate, second barrier film is respectively r1, r2, r3, r4; The tolerance of said first arithmetic progression and second arithmetic progression is k π (r1+r2+r3+r4), wherein, and k>=1; Under the theory state, fit when reeling fully, k should equal 1; In actual winding process, because the difference of elasticity, k can be slightly larger than 1; Certainly, be the effect that guarantees to reel, the scope of adjustment factor k is generally 1≤k≤1.2.Behind whole poor pitch pole piece coiling; The overlapped formation lug of all protuberances, this lug is bipolar ear structure, is divided into two parts; A part is in the front portion of coiling body; Another part is at the rear portion of coiling body, and so bipolar ear structure can pass through bigger electric current, thereby has promoted the performance of battery.Aforesaid poor pitch pole piece comprises positive plate and negative plate, and die-cut lug is symmetrically distributed after being wound into electric core on positive plate and the negative plate, and distribution is connected with positive terminal, negative terminal.To the die-cut employing cutting die cross cutting of the protuberance that forms lug or adopt laser cutting, cutting accurately, efficient is high.Pole piece elder generation spacing as shown in Figure 3 is carried out die-cut, and a is the width (that is: the width of lug) of first protuberance among the figure, by becoming first arithmetic progression to increase behind the forward direction successively; B is the spacing between first protuberance and second protuberance, and by becoming second arithmetic progression to increase behind the forward direction successively, the tolerance of first arithmetic progression and second arithmetic progression is y; Y=k π (r1+r2+r3+r4), wherein, 1≤k≤1.2; Just formed structure shown in Figure 4 through reeling after the die-cut like this completion, all protuberances overlap fully, form lug; Positive plate and negative plate replace overlapping coiling, thereby form independently anode ear and negative electrode lug on the top of pole piece, the coexist structure on pole piece top of anode ear and negative electrode lug; Simplified the structure of battery, made things convenient for and being connected of terminal.
Like Fig. 5,6, shown in 7, electrokinetic cell comprises that electric core 2, location cover 3, aluminium lid 4 and housing 1; Said electric core 2 places in the said housing 1, and electric core 2 tops are provided with the location and cover 3, and the location is covered 3 tops and is provided with aluminium lid 4; Said aluminium lid 4 is fixedly connected with housing 1, and said electric core 2 comprises positive plate, first barrier film, negative plate and second barrier film, and said positive plate and negative plate are poor pitch pole piece; Difference pitch pole piece comprises coating portion and uncoated portion, and said uncoated portion is the some protuberances of die-cut formation at interval, the width of all protuberances by forward direction after increase successively; Spacing between the two adjacent protuberances increases after by forward direction successively; Behind whole poor pitch pole piece coiling, the overlapped formation lug of all protuberances, said positive plate, first barrier film, negative plate and second barrier film neatly stack the back coiling and form electric core 2; Electricity core 2 can place in the aluminum metal case, also can place and form electrokinetic cell in the external packings such as stainless steel casing, plastic casing, aluminum-plastic composite membrane.Like Fig. 6 and shown in Figure 7, the edge ring of said aluminium lid 4 is provided with a circle crimping 41, and said aluminium lid 4 welds together through the inwall of said crimping 41 with said housing 1, this sound construction, and processing technology is simple.The anode ear of aforementioned structure and negative electrode lug can both neatly overlap preposition after reeling; Be convenient to be connected with the anode and cathode terminals of battery; Ways of connecting is after overlapping lug (anode ear and negative electrode lug) is put in order, goes out an aperture therebetween, directly is connected with the anode and cathode terminals of battery with screw; Perhaps directly adopt riveted structure to be connected, can also adopt Welding Structure to be connected with the anode and cathode terminals of battery with the anode and cathode terminals of battery.Therefore, the neat overlapping extreme ear structure that this poor pitch forms is applicable to multiple connected mode; Not only the product internal resistance is very little; The battery rapid heat dissipation, and simplify the structure and technology, the volume of electrokinetic cell reduced; Avoid occurring phenomenons such as rosin joint and disconnected lug, thereby improved the quality and the production efficiency of electrokinetic cell.
The foregoing description is the explanation to the utility model, is not the qualification to the utility model, any protection range that scheme after the utility model simple transformation is all belonged to the utility model.
Claims (6)
1. poor pitch pole piece that is used for electrokinetic cell; It is characterized in that: comprise coating portion and the uncoated portion that is positioned at coating portion top; Said uncoated portion is the some protuberances of die-cut formation at interval, and the width of all protuberances increases after by forward direction successively, the spacing between the two adjacent protuberances equate or two adjacent protuberances between spacing increase successively after by forward direction; Behind whole poor pitch pole piece coiling, the overlapped formation lug of all protuberances.
2. electrokinetic cell that adopts poor pitch pole piece is characterized in that: comprise electric core, location lid, aluminium lid and housing, said electric core places in the said housing; Electricity core top is provided with the location lid; The side of covering, location is provided with aluminium lid, and said aluminium lid is fixedly connected with housing, and said electric core comprises positive plate, first barrier film, negative plate and second barrier film; Said positive plate and negative plate are poor pitch pole piece; Said poor pitch pole piece comprises coating portion and the uncoated portion that is positioned at coating portion top, and said uncoated portion is the some protuberances of die-cut formation at interval, and the width of all protuberances increases after by forward direction successively; Spacing between the two adjacent protuberances equates to increase successively after perhaps the spacing between the two adjacent protuberances is by forward direction; Behind whole poor pitch pole piece coiling, the overlapped formation lug of all protuberances, said positive plate, first barrier film, negative plate and second barrier film neatly stack the back coiling and form electric core.
3. a kind of electrokinetic cell that adopts poor pitch pole piece as claimed in claim 2 is characterized in that: the width of said protuberance becomes after by forward direction arithmetic progression to increase successively, and the spacing between the two adjacent protuberances equates.
4. a kind of electrokinetic cell that adopts poor pitch pole piece as claimed in claim 3; It is characterized in that: the thickness of establishing positive plate, first barrier film, negative plate, second barrier film is respectively r1, r2, r3, r4; The tolerance of said arithmetic progression is 2k π (r1+r2+r3+r4), wherein, and k >=1.
5. a kind of electrokinetic cell that adopts poor pitch pole piece as claimed in claim 2; It is characterized in that: the width of said protuberance becomes after by forward direction first arithmetic progression to increase successively, and the spacing between the two adjacent protuberances becomes second arithmetic progression to increase after by forward direction successively.
6. a kind of electrokinetic cell that adopts poor pitch pole piece as claimed in claim 5; It is characterized in that: the thickness of establishing positive plate, first barrier film, negative plate, second barrier film is respectively r1, r2, r3, r4; The tolerance of said first arithmetic progression and second arithmetic progression is k π (r1+r2+r3+r4); Wherein, k >=1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200496747U CN202434631U (en) | 2012-02-16 | 2012-02-16 | Differential pitch pole piece and power battery using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200496747U CN202434631U (en) | 2012-02-16 | 2012-02-16 | Differential pitch pole piece and power battery using same |
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| CN202434631U true CN202434631U (en) | 2012-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200496747U Withdrawn - After Issue CN202434631U (en) | 2012-02-16 | 2012-02-16 | Differential pitch pole piece and power battery using same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569721A (en) * | 2012-02-16 | 2012-07-11 | 浙江兴海能源科技有限公司 | Difference pitch pole pieces and power battery adopting difference pitch pole pieces |
| CN106058137A (en) * | 2016-08-03 | 2016-10-26 | 上海航天电源技术有限责任公司 | Wound tab of lithium ion battery and manufacturing method of tab |
| EP3694043A4 (en) * | 2018-07-20 | 2021-07-07 | Ruipu Energy Co., Ltd. | Electrode plate and battery cell of wound lithium-ion battery and method for manufacturing same |
| US11081723B2 (en) | 2015-09-18 | 2021-08-03 | Gs Yuasa International Ltd. | Energy storage device and energy storage device production method |
-
2012
- 2012-02-16 CN CN2012200496747U patent/CN202434631U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569721A (en) * | 2012-02-16 | 2012-07-11 | 浙江兴海能源科技有限公司 | Difference pitch pole pieces and power battery adopting difference pitch pole pieces |
| CN102569721B (en) * | 2012-02-16 | 2014-04-23 | 浙江兴海能源科技有限公司 | Difference pitch pole pieces and power battery adopting difference pitch pole pieces |
| US11081723B2 (en) | 2015-09-18 | 2021-08-03 | Gs Yuasa International Ltd. | Energy storage device and energy storage device production method |
| CN106058137A (en) * | 2016-08-03 | 2016-10-26 | 上海航天电源技术有限责任公司 | Wound tab of lithium ion battery and manufacturing method of tab |
| EP3694043A4 (en) * | 2018-07-20 | 2021-07-07 | Ruipu Energy Co., Ltd. | Electrode plate and battery cell of wound lithium-ion battery and method for manufacturing same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120912 Effective date of abandoning: 20140423 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120912 Effective date of abandoning: 20140423 |
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| RGAV | Abandon patent right to avoid regrant |