CN205376655U - Secondary battery - Google Patents
Secondary battery Download PDFInfo
- Publication number
- CN205376655U CN205376655U CN201620053615.5U CN201620053615U CN205376655U CN 205376655 U CN205376655 U CN 205376655U CN 201620053615 U CN201620053615 U CN 201620053615U CN 205376655 U CN205376655 U CN 205376655U
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- China
- Prior art keywords
- connecting portion
- negative
- blank
- pole connecting
- current collector
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- Withdrawn - After Issue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model provides a secondary battery, including naked electric core, anodal utmost point ear and negative pole utmost point ear. Naked electric core includes anodal pole piece and negative pole pole piece. Anodal pole piece has the blank anodal mass flow on the positive active material layer that does not coat personally experiences sth. Part of the body, and the blank anodal mass flow body of cutting part is upwards folded and is formed anodal connecting portion, and the anodal connecting portion of part exceed the external edge of anodal mass flow on width direction at least, and positive pole utmost point ear is fixed and the part that exceeds the anodal external edge of mass flow in anodal connecting portion is connected to the electricity, and just the anodal extremely thickness of ear is greater than the thickness of anodal connecting portion, and/or the negative pole pole piece has a blank negative current collector on the negative active material layer that does not coat, and the blank negative current collector of cutting part upwards folding and form the negative pole connecting portion, and at least partly negative pole connecting portion surpass the negative current collector outward flange at width direction, and the part that surpasss the negative current collector outward flange in the negative pole connecting portion is connected to the fixed and electricity of negative pole utmost point ear, and the thickness of negative pole utmost point ear is greater than the thickness of negative pole connecting portion.
Description
Technical field
This utility model relates to field of batteries, particularly relates to a kind of secondary cell.
Background technology
Along with electronic product is to miniaturization, multifunction development, the energy density of battery is required also more and more higher by it, and this just requires that battery core to provide more capacity in same space.In the secondary cell of tradition winding-structure, the initiating terminal of positive and negative electrode pole piece is designed with blank collector, and one end of positive pole ear and negative lug is directly welded on the blank collector on positive and negative electrode pole piece, and the other end stretches out packaging bag about 10mm.If lug is too thin, its intensity is low, and the lug part stretching out packaging bag is easily broken off, and the overflow section of lug amasss little, therefore to ensure that its intensity and overflow section amass, the thickness of lug is more than 60um.Due to adding up of lug thickness so that the thickness in soldering polar ear region is the maximum gauge of battery, again because the thickness of lug is difficult to further reduction, therefore the energy density of battery is difficult to further raising.
In current core strueture, utilize ultra-sonic welded to be welded on the collector of positive and negative electrode pole piece by anode ear pole and negative lug, simultaneously at the local double spreading paper of welding, and positive pole ear and negative lug are drawn with after packaging bag sealing.
Therefore, current technique there is the problem that
1. lug thickness is thicker, takies battery core thickness space；
2. all need rubberizing paper on welding two sides, take battery core thickness space；
3. owing to lug is substantially thicker, big soldering tip ultra-sonic welded need to be adopted, cause that the weldering print on collector is deeper.
Utility model content
In view of Problems existing in background technology, the purpose of this utility model is in that to provide a kind of secondary cell, and it can reduce the thickness of naked battery core of secondary cell, improves the energy density of naked battery core.
To achieve these goals, this utility model provides a kind of secondary cell, and it includes naked battery core, positive pole ear and negative lug.
Naked battery core includes anode pole piece and cathode pole piece.
Anode pole piece has plus plate current-collecting body and the positive electrode active material layer being coated on anode collection surface, anode pole piece has the blank plus plate current-collecting body of uncoated positive active material layer, blank plus plate current-collecting body is formed with positive pole connecting portion, positive pole connecting portion is by cutting the blank plus plate current-collecting body of a part and being folded up by the partial blank plus plate current-collecting body of this cutting and formed, make at least some of positive pole connecting portion in the direction of the width beyond anode collection outer rim, positive pole connecting portion is fixed and be electrically connected in one end of positive pole ear in the direction of the width beyond the outer peripheral part of plus plate current-collecting body, and the thickness of positive pole ear is more than the thickness of positive pole connecting portion；And/or cathode pole piece has negative current collector and the negative electrode active material layer being coated on negative pole currect collecting surface, cathode pole piece has the blank negative current collector of uncoated negative electrode active material layer, blank negative current collector is formed with negative pole connecting portion, negative pole connecting portion is by cutting the blank negative current collector of a part and being folded up by the partial blank negative current collector of this cutting and formed, make at least some of negative pole connecting portion at width beyond negative pole currect collecting outer rim, negative pole connecting portion is fixed and be electrically connected in one end of negative lug in the direction of the width beyond the outer peripheral part of negative current collector, and the thickness of negative lug is more than the thickness of negative pole connecting portion.
The beneficial effects of the utility model are as follows:
According in secondary cell of the present utility model, positive pole ear is connected beyond the outer peripheral part of plus plate current-collecting body in the direction of the width with positive pole connecting portion, and/or negative lug and negative pole connecting portion are in the direction of the width beyond the outer peripheral part of negative current collector, so positive pole ear and/or negative lug are without stretching into the inside of naked battery core, and is formed by blank plus plate current-collecting body cutting turnover due to positive pole connecting portion and/or negative pole folding part is directly turned down by blank negative current collector cutting and formed, so the thickness of positive pole folding part and/or negative pole folding part is little, thus thickness when reducing naked anode ring forming, improve the energy density of naked battery core；The thickness of positive pole ear is more than thickness more than negative pole connecting portion of the thickness of positive pole connecting portion and/or the thickness of negative lug, it can be ensured that the intensity of positive pole ear and/or negative lug self, it is to avoid fracture.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the naked battery core according to secondary cell of the present utility model；
Fig. 2 is the axonometric chart of the embodiment according to secondary cell of the present utility model；
Fig. 3 is the axonometric chart of another embodiment according to secondary cell of the present utility model；
Fig. 4 is the encapsulation schematic diagram according to secondary cell of the present utility model；
Fig. 5 is the connection diagram of the positive pole ear according to secondary cell of the present utility model and plus plate current-collecting body；
Fig. 6 is the upward view of Fig. 5；
Fig. 7 is the side view of Fig. 5；
Fig. 8 is the connection diagram of the negative lug according to secondary cell of the present utility model and negative current collector；
Fig. 9 is the upward view of Fig. 8；
Figure 10 is the side view of Fig. 8；
Figure 11 to Figure 14 is the schematic diagram of the positive pole connecting portion of the different embodiments according to secondary cell of the present utility model；
Figure 15 to Figure 18 is the schematic diagram of the negative pole connecting portion of the different embodiments according to secondary cell of the present utility model.
Wherein, description of reference numerals is as follows:
1 naked battery core 122 negative electrode active material layer
11 anode pole piece 2 positive pole ears
111 plus plate current-collecting body 3 negative lug
1111 blank plus plate current-collecting body P packaging bags
11111 positive pole connecting portion S1 first surfaces
111E anode collection outer rim S2 first back side
112 positive electrode active material layer S3 second surfaces
12 cathode pole piece S4 second back sides
121 negative current collector L length directions
1211 blank negative current collector W widths
12111 negative pole connecting portion T one-faced tapes
121E negative pole currect collecting outer rim
Detailed description of the invention
Describe secondary cell of the present utility model with reference to the accompanying drawings in detail.
Referring to figs. 1 through Figure 18, include naked battery core 1, positive pole ear 2 and negative lug 3 according to secondary cell of the present utility model.
Naked battery core 1 includes anode pole piece 11 and cathode pole piece 12.
nullAnode pole piece 11 has plus plate current-collecting body 111 and the positive electrode active material layer 112 being coated on plus plate current-collecting body 111 surface，Anode pole piece 11 has the blank plus plate current-collecting body 1111 of uncoated positive active material layer 112，Blank plus plate current-collecting body 1111 is formed with positive pole connecting portion 11111，Positive pole connecting portion 11111 is by cutting the blank plus plate current-collecting body 1111 of a part and being folded up by the partial blank plus plate current-collecting body 1111 of this cutting and formed，Make at least some of positive pole connecting portion 11111 beyond anode collection outer rim 111E on width W，Positive pole connecting portion 11111 part beyond anode collection outer rim 111E on width W is fixed and be electrically connected in one end of positive pole ear 2，And the thickness of positive pole ear 2 is more than the thickness of positive pole connecting portion 1111；nullAnd/or cathode pole piece 12 has negative current collector 121 and the negative electrode active material layer 122 being coated on negative pole currect collecting surface，Cathode pole piece 12 has the blank negative current collector 1211 of uncoated negative electrode active material layer 122，Blank negative current collector 1211 is formed with negative pole connecting portion 12111，Negative pole connecting portion 12111 is by cutting the blank negative current collector 1211 of a part and being folded up by the partial blank negative current collector 1211 of this cutting and formed，Make at least some of negative pole connecting portion 12111 at width W beyond negative pole currect collecting outer rim 121E，Negative pole connecting portion 12111 part beyond negative pole currect collecting outer rim 121E on width W is fixed and be electrically connected in one end of negative lug 3，And the thickness of negative lug 3 is more than the thickness of negative pole connecting portion 12111.
According in secondary cell of the present utility model, the part that positive pole ear 2 exceeds anode collection outer rim 111E with positive pole connecting portion 11111 on width W is connected, and/or negative lug 3 exceeds the part of negative pole currect collecting outer rim 121E with negative pole connecting portion 12111 on width W, so positive pole ear 2 and/or negative lug 3 are without stretching into the inside of naked battery core 1, and is formed and/or negative pole folding part 12111 directly is cut to turn down by blank negative current collector 1211 and formed owing to positive pole connecting portion 11111 is cut turnover by blank plus plate current-collecting body 1111, so the thickness of positive pole folding part 11111 and/or negative pole folding part 12111 is little, thus thickness when reducing naked battery core 1 molding, improve the energy density of naked battery core 1；The thickness of positive pole ear 2 is more than thickness more than negative pole connecting portion 12111 of the thickness of positive pole connecting portion 11111 and/or the thickness of negative lug 3, it can be ensured that the intensity of positive pole ear 2 and/or negative lug 3 self, it is to avoid fracture.
According in secondary cell of the present utility model, with reference to Fig. 2, Fig. 3, Fig. 5, Fig. 6, Figure 11 to Figure 14, in one embodiment, the width of the positive pole ear 2 L along its length width less than positive pole connecting portion 11111 L along its length.Owing to positive pole connecting portion 11111 is wider than positive pole ear 2, thus ensureing the captured area excessively of positive pole connecting portion 11111.
According in secondary cell of the present utility model, with reference to Fig. 2, Fig. 3, Fig. 8, Fig. 9, Figure 15 to Figure 18, in one embodiment, the width of the negative lug 3 L along its length width less than negative pole connecting portion 12111 L along its length.Owing to negative pole connecting portion 12111 is wider than negative lug 3, thus ensureing the captured area excessively of negative pole connecting portion 12111.
According in secondary cell of the present utility model, in one embodiment, positive pole ear 2 is made of aluminum.
According in secondary cell of the present utility model, in one embodiment, negative lug 3 is made up of nickel.
According in secondary cell of the present utility model, in one embodiment, the width of positive pole connecting portion 11111 is 6mm～30mm.
According in secondary cell of the present utility model, in one embodiment, the width of negative pole connecting portion 12111 is 6mm～30mm.
According in secondary cell of the present utility model, in one embodiment, the thickness of positive pole ear 2 is 50 μm～150 μm, and width is 3mm～15mm.
According in secondary cell of the present utility model, in one embodiment, the thickness of negative lug 3 is 50 μm～150 μm, and width is 3mm～15mm.
According in secondary cell of the present utility model, in one embodiment, positive pole connecting portion 11111 and blank plus plate current-collecting body 1111 movable contact after bending；And/or negative pole connecting portion 12111 and blank negative current collector 1211 movable contact after bending.It is to say, positive pole connecting portion 11111 rely on folding after self plastic deformation keep with blank plus plate current-collecting body 1111 contact and/or negative pole connecting portion 12111 rely on folding after self plastic deformation keep and the contacting of blank negative current collector 1211.
According in secondary cell of the present utility model, in one embodiment, the part that positive pole connecting portion 11111 contacts with blank plus plate current-collecting body 1111 is fixedly connected on blank plus plate current-collecting body 1111；And/or the part that negative pole connecting portion 12111 contacts with blank negative current collector 1211 is fixedly connected on blank negative current collector 1211.
According in secondary cell of the present utility model, in one embodiment, gummed paper (not shown) is posted in the fixed connection place of positive pole connecting portion 11111 and blank plus plate current-collecting body 1111；And/or the fixed connection place of negative pole connecting portion 12111 and blank negative current collector 1211 posts gummed paper (not shown).
According in secondary cell of the present utility model, with reference to Fig. 5 and Fig. 6, in one embodiment, the part that positive pole connecting portion 11111 contacts with blank plus plate current-collecting body 1111 is fixed on blank plus plate current-collecting body 1111 by welding (such as ultrasonic bonding), at positive pole connecting portion 11111 and blank plus plate current-collecting body 1111 weld, weldering print on the first surface S1 of positive pole connecting portion 11111 posts gummed paper (not shown), and the roughness of first back side S2 relative with first surface S1 of blank plus plate current-collecting body 1111 is 1.5 μm～10 μm.Specifically, owing to positive pole connecting portion 11111 is fixed on blank plus plate current-collecting body 1111 by ultrasonic bonding, and the intensive soldering tip of the solder joint of device for ultrasonic welding is relative with the first surface S1 of positive pole connecting portion 11111, the tack of device for ultrasonic welding is then relative with the first back side S2 of blank plus plate current-collecting body 1111, so after ultrasonic bonding completes, the roughness of the first back side S2 is relatively low, without pasting gummed paper, and the roughness of first surface S1 is higher, so needing to paste gummed paper on first surface S1；Owing to the first back side S2 is without pasting gummed paper such that it is able to further reduce thickness during naked battery core 1 molding, improve the energy density of naked battery core 1.
According in secondary cell of the present utility model, with reference to Fig. 8 and Fig. 9, in one embodiment, the part of negative pole connecting portion 12111 blank negative current collector 1211 contact is fixed on blank negative current collector 1211 by welding (such as ultrasonic bonding), at negative pole connecting portion 12111 and blank negative current collector 1211 weld, weldering print on the second surface S3 of negative pole connecting portion 12111 posts gummed paper (not shown), and the roughness of second back side S4 relative with second surface S3 of blank negative current collector 1211 is 1.5 μm～10 μm.Specifically, owing to negative pole connecting portion 12111 is fixed on blank negative current collector 1211 by ultrasonic bonding, and the intensive soldering tip of the solder joint of device for ultrasonic welding is relative with the second surface S3 of negative pole connecting portion 12111, the tack of device for ultrasonic welding is then relative with the second back side S4 of blank negative current collector 1211, so after ultrasonic bonding completes, the roughness of the second back side S4 is relatively low, without pasting gummed paper, and the roughness of second surface S3 is higher, so needing to paste gummed paper on second surface S3；Owing to the second back side S4 is without pasting gummed paper such that it is able to further reduce thickness during naked battery core 1 molding, improve the energy density of naked battery core 1.
According in secondary cell of the present utility model, with reference to Fig. 4, in one embodiment, one end not being connected with positive pole connecting portion 11111 of positive pole ear 2 is drawn out to the outside of the packaging bag P of secondary cell.
According in secondary cell of the present utility model, in one embodiment, one end not being connected with negative pole connecting portion 12111 of negative lug 3 is drawn out to the outside of the packaging bag P of secondary cell.
According in secondary cell of the present utility model, in one embodiment, the whole surrounding of part of 2 packaged bags of P encapsulation of positive pole ear posts gummed paper (not shown)；And/or the whole surrounding of part of 3 packaged bags of P of negative lug encapsulation posts gummed paper (not shown).
According in secondary cell of the present utility model, in one embodiment, it is characterised in that described gummed paper is green glue.
According in secondary cell of the present utility model, in one embodiment, the thickness of described gummed paper is 10 μm～35 μm.
According in secondary cell of the present utility model, with reference to Fig. 5, in one embodiment, positive pole ear 2 is fixed by welding in positive pole connecting portion 11111 and reaches the part outside anode collection outer rim 111E.
According in secondary cell of the present utility model, with reference to Fig. 8, in one embodiment, negative lug 3 is fixed by welding in negative pole connecting portion 12111 and reaches the part outside negative pole currect collecting outer rim 121E.
According in secondary cell of the present utility model, with reference to Fig. 5, Fig. 6, Figure 11 and Figure 12, in one embodiment, positive pole connecting portion 11111 is cut by the blank plus plate current-collecting body 1111 of anode pole piece 11 length direction L one end and forms.
According in secondary cell of the present utility model, with reference to Fig. 8, Fig. 9, Figure 15 and Figure 16, in one embodiment, negative pole connecting portion 12111 is cut by the blank negative current collector 1211 of cathode pole piece 12 length direction L one end and forms.
According in secondary cell of the present utility model, with reference to Figure 13 and Figure 14, in one embodiment, positive pole connecting portion 11111 is cut by the blank plus plate current-collecting body 1111 in the middle part of anode pole piece 11 and forms.
According in secondary cell of the present utility model, with reference to Figure 17 and Figure 18, in one embodiment, negative pole connecting portion 12111 is cut by the blank negative current collector 1211 in the middle part of cathode pole piece 12 and forms.
According in secondary cell of the present utility model, with reference to Figure 12 and Figure 14, in one embodiment, blank plus plate current-collecting body 1111, after cutting, removes the residue blank plus plate current-collecting body outside the partial blank plus plate current-collecting body 1111 forming positive pole connecting portion 11111 in " returning " font structure.Words sentence is talked about, and " returning " font structure is the border seal of the shaped as frame with opening and opening, and wherein the part of positive pole connecting portion 11111 will form this opening after turnover on blank plus plate current-collecting body 1111.Adopting this " time " font structure can improve the plus plate current-collecting body 111 bonding strength at opening part, reducing the risk of fracture, thus easily being automated continuous production.
According in secondary cell of the present utility model, with reference to Figure 16 and Figure 18, in one embodiment, blank negative current collector 1211, after cutting, removes the residue blank negative current collector 1211 outside the partial blank negative current collector 1211 forming negative pole connecting portion 12111 in " returning " font structure.Words sentence is talked about, and " returning " font structure is the border seal of the shaped as frame with opening and opening, and wherein the part of negative pole connecting portion 12111 will form this opening after turnover on blank negative current collector 1211.Adopting this " time " font structure can improve the plus plate current-collecting body 111 bonding strength at opening part, reducing the risk of fracture, thus easily being automated continuous production.
According in secondary cell of the present utility model, with reference to Fig. 5, Fig. 6, Figure 11 and Figure 13, in one embodiment, blank plus plate current-collecting body 1111, after cutting, removes the residue blank plus plate current-collecting body outside the partial blank plus plate current-collecting body 1111 forming positive pole connecting portion 11111 in " U " type structure.
According in secondary cell of the present utility model, with reference to Fig. 8, Fig. 9, Figure 15 and Figure 17, in one embodiment, blank negative current collector 1211, after cutting, removes the residue blank negative current collector 1211 outside the partial blank negative current collector 1211 forming negative pole connecting portion 12111 in " U " type structure.
Claims (10)
1. a secondary cell, including:
Naked battery core (1), including anode pole piece (11) and cathode pole piece (12)；
Positive pole ear (2)；And
Negative lug (3)；
It is characterized in that,
nullAnode pole piece (11) has plus plate current-collecting body (111) and the positive electrode active material layer (112) being coated on plus plate current-collecting body (111) surface，Anode pole piece (11) has the blank plus plate current-collecting body (1111) of uncoated positive active material layer (112)，Blank plus plate current-collecting body (1111) is formed with positive pole connecting portion (11111)，Positive pole connecting portion (11111) is by cutting the blank plus plate current-collecting body (1111) of a part and being folded up by the partial blank plus plate current-collecting body (1111) of this cutting and formed，Make at least some of positive pole connecting portion (11111) upper beyond anode collection outer rim (111E) at width (W)，Positive pole connecting portion (11111) is fixed and be electrically connected in one end of positive pole ear (2) in the upper part beyond anode collection outer rim (111E) of width (W)，And the thickness of positive pole ear (2) is more than the thickness of positive pole connecting portion (1111)；And/or
nullCathode pole piece (12) has negative current collector (121) and the negative electrode active material layer (122) being coated on negative pole currect collecting surface，Cathode pole piece (12) has the blank negative current collector (1211) of uncoated negative electrode active material layer (122)，Blank negative current collector (1211) is formed with negative pole connecting portion (12111)，Negative pole connecting portion (12111) is by cutting the blank negative current collector (1211) of a part and being folded up by the partial blank negative current collector (1211) of this cutting and formed，Make at least some of negative pole connecting portion (12111) at width (W) beyond negative current collector (121) outward flange (121E)，Negative pole connecting portion (12111) is fixed and be electrically connected in one end of negative lug (3) in the upper part beyond negative pole currect collecting outer rim (121E) of width (W)，And the thickness of negative lug (3) is more than the thickness of negative pole connecting portion (12111).
2. secondary cell according to claim 1, it is characterised in that
The width of positive pole ear (2) (L) the along its length width less than positive pole connecting portion (11111) (L) along its length；And/or
The width of negative lug (3) (L) the along its length width less than negative pole connecting portion (12111) (L) along its length.
3. secondary cell according to claim 1, it is characterised in that
The width of positive pole connecting portion (11111) is 6mm～30mm；And/or
The width of negative pole connecting portion (12111) is 6mm～30mm.
4. secondary cell according to claim 1, it is characterised in that
The thickness of positive pole ear (2) is 50 μm～150 μm, and width is 3mm～15mm；
The thickness of negative lug (3) is 50 μm～150 μm, and width is 3mm～15mm.
5. secondary cell according to claim 1, it is characterised in that
The part that positive pole connecting portion (11111) contacts with blank plus plate current-collecting body (1111) is fixedly connected on blank plus plate current-collecting body (1111)；And/or
The part that negative pole connecting portion (12111) contacts with blank negative current collector (1211) is fixedly connected on blank negative current collector (1211).
6. secondary cell according to claim 5, it is characterised in that
The part that positive pole connecting portion (11111) contacts with blank plus plate current-collecting body (1111) is fixed by welding on blank plus plate current-collecting body (1111), at positive pole connecting portion (11111) and blank plus plate current-collecting body (1111) weld, weldering print on the first surface (S1) of positive pole connecting portion (11111) posts gummed paper, and the roughness at first back side (S2) relative with first surface (S1) of blank plus plate current-collecting body (1111) is 1.5 μm～10 μm；And/or
The part that the blank negative current collector (1211) of negative pole connecting portion (12111) contacts is fixed by welding on blank negative current collector (1211), at negative pole connecting portion (12111) and blank negative current collector (1211) weld, weldering print on the second surface (S3) of negative pole connecting portion (12111) posts gummed paper, and the roughness at second back side (S4) relative with second surface (S3) of blank negative current collector (1211) is 1.5 μm～10 μm.
7. secondary cell according to claim 1, it is characterised in that
Positive pole connecting portion (11111) is cut by the blank plus plate current-collecting body (1111) of anode pole piece (11) length direction (L) one end and forms；And/or
Negative pole connecting portion (12111) is cut by the blank negative current collector (1211) of cathode pole piece (12) length direction (L) one end and forms.
8. secondary cell according to claim 1, it is characterised in that
Positive pole connecting portion (11111) is formed by blank plus plate current-collecting body (1111) cutting at anode pole piece (11) middle part；And/or
Negative pole connecting portion (12111) is formed by blank negative current collector (1211) cutting at cathode pole piece (12) middle part.
9. the secondary cell according to claim 7 or 8, it is characterised in that
Blank plus plate current-collecting body (1111), after cutting, removes the residue blank plus plate current-collecting body outside the partial blank plus plate current-collecting body (1111) forming positive pole connecting portion (11111) and is back font structure；And/or
Blank negative current collector (1211), after cutting, removes residue blank negative current collector (1211) outside the partial blank negative current collector (1211) forming negative pole connecting portion (12111) and is back font structure.
10. the secondary cell according to claim 7 or 8, it is characterised in that
Blank plus plate current-collecting body (1111), after cutting, removes the residue U-shaped structure of blank plus plate current-collecting body outside the partial blank plus plate current-collecting body (1111) forming positive pole connecting portion (11111)；And/or
Blank negative current collector (1211), after cutting, removes residue blank negative current collector (1211) the U-shaped structure outside the partial blank negative current collector (1211) forming negative pole connecting portion (12111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053615.5U CN205376655U (en) | 2016-01-20 | 2016-01-20 | Secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053615.5U CN205376655U (en) | 2016-01-20 | 2016-01-20 | Secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205376655U true CN205376655U (en) | 2016-07-06 |
Family
ID=56273785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620053615.5U Withdrawn - After Issue CN205376655U (en) | 2016-01-20 | 2016-01-20 | Secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205376655U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992313A (en) * | 2016-01-20 | 2017-07-28 | 宁德新能源科技有限公司 | Secondary cell |
-
2016
- 2016-01-20 CN CN201620053615.5U patent/CN205376655U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992313A (en) * | 2016-01-20 | 2017-07-28 | 宁德新能源科技有限公司 | Secondary cell |
| CN106992313B (en) * | 2016-01-20 | 2023-04-07 | 宁德新能源科技有限公司 | Secondary battery |
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