CN101099257A - Rectangular storage battery - Google Patents
Rectangular storage battery Download PDFInfo
- Publication number
- CN101099257A CN101099257A CNA2006800018070A CN200680001807A CN101099257A CN 101099257 A CN101099257 A CN 101099257A CN A2006800018070 A CNA2006800018070 A CN A2006800018070A CN 200680001807 A CN200680001807 A CN 200680001807A CN 101099257 A CN101099257 A CN 101099257A
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- Prior art keywords
- mentioned
- lid
- storage element
- charge storage
- square tube
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011347 resin Substances 0.000 claims abstract description 42
- 229920005989 resin Polymers 0.000 claims abstract description 42
- 238000005452 bending Methods 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000002309 gasification Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000008393 encapsulating agent Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 244000287680 Garcinia dulcis Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A square-shaped storage battery including a rectangular accumulator element ( 16 ), a sealed case ( 30 ) that accommodates the accumulator element, and a resin plate ( 20 ) which is formed of a hard resin having insulating properties and interposed between the sealed case and the accumulator element for limiting movement of the accumulator element.
Description
Technical field
The present invention relates in square closed shell, take in the prismatic cell of the charge storage element of rectangular shape.
Background technology
Electrified and electronic along with automobile equipment, the purposes of the chargeable storage of secondary cell, electrolytic capacitor, capacitor etc. increases gradually.
The structure example of storage battery of taking in charge storage element in closed shell is open as having done in TOHKEMY 2003-308810 number bulletin.According to Figure 12 this storage battery is described.
Storage battery 100 shown in Figure 12 is made of following: circular cylindrical shell 101; Charge storage element 102, it is incorporated in this circular cylindrical shell 101; Many lead-in wires 103, it extends from this charge storage element 102; Collector plate 104,104, its negative or positive electrode with these lead-in wires 103 is connected; End plate 108,108, it closes the openings at two ends of above-mentioned circular cylindrical shell 101; Electrode bar 105,105, it extends from above-mentioned collector plate 104,104, connects above-mentioned end plate 108,108; Nut 106,106, it screws in the front end of these electrode bars 105,105 separately; And sell 107,107, extend at its center from above-mentioned end plate 108,108 towards circular cylindrical shell 101, connects above-mentioned collector plate 104,104.
Apply direct voltage by wiring harness 109,109 to electrode bar 105,105, thereby can be accumulated in electric energy in the charge storage element 102.And the electric energy that is accumulated in the charge storage element 102 can take out via electrode bar 105,105 and wiring harness 109,109.
Wiring harness 109,109 is fixed on the electrode bar 105,105 by nut 106,106.When fastening nut 106,106, apply revolving force to electrode bar 105,105, collector plate 104,104 is by pin 107,107 restriction rotations, thereby electrode bar 105,105 does not rotate.
Aspect the rotation that prevents collector plate 104,104 and electrode bar 105,105, pin 107,107 plays important effect.
When the length of charge storage element 102 is made as L1, when the length of circular cylindrical shell 101 was made as L2, the length L 2 of circular cylindrical shell was owing to the length of pin 107,107 is included in interior the increase.That is, decide the length L 1 of charge storage element 102 according to desired electric power storage ability, yet compare with this length L 1, the length L 2 of circular cylindrical shell 101 is big, produces housing 101 and becomes big problem pro rata with the electric power storage ability.
And, in storage battery 100, enclose electrolyte in inside, promote electrochemical reaction.Make the part gasification of electrolyte owing to electrochemical reaction.Owing to making the internal pressure of storage battery 100, this gasification rises.Circular cylindrical shell 101 is owing to be tube and the ability of internal pressure-resistant is strong, yet end plate 108,108 is owing to be a little less than the ability of flat board and internal pressure-resistant.
In order to remedy this weakness, as shown in the figure, compare the thickness that end plate 1 08,108 has several times with circular cylindrical shell 101.End plate 108,108 is thick more, and storage battery 100 is just heavy more.
Therefore, under situation about a plurality of storage batterys being installed on the vehicle, the miniaturization and the lightweight of expectation storage battery 100.
Summary of the invention
According to notion of the present invention, a kind of prismatic cell is provided, this prismatic cell is made of following, that is: the charge storage element of rectangular shape; Closed shell, the lid that it comprises the square tube of surrounding this charge storage element and closes the opening of this square tube; And resin plate, it is made of the hard resin with insulating properties, is inserted between above-mentioned closed shell and the above-mentioned charge storage element, is used to limit moving of above-mentioned charge storage element.
Owing to resin plate is inserted between closed shell and the above-mentioned charge storage element, thereby can suppresses the rotation of charge storage element.Closed shell can be made the size that the insertion of resin plate in charge storage element taken into account.And resin plate is thin.As a result, can realize the miniaturization of closed shell.Along with miniaturization can realize the lightweight of closed shell, thereby can realize the miniaturization and the lightweight of prismatic cell.
Preferably, above-mentioned resin plate is made of following, that is: flat part, and it is parallel to above-mentioned lid and disposes; And the skirt section, it is from the rectangular bending of this flat part, is parallel to above-mentioned square tube and disposes.
Preferably, the side in above-mentioned square tube and the above-mentioned lid is made of following, that is: metallic plate; And the insulative resin film, it covers on this metallic plate.
Preferably, above-mentioned lid is at four jiaos of outstanding protuberances of basal plane (general face) that have from square plate.
Preferably, raised part is outstanding towards the direction away from above-mentioned charge storage element.
Preferably, above-mentioned lid is installed on the square tube, so that above-mentioned basal plane and raised part do not exceed the end of above-mentioned square tube.
Preferably, above-mentioned resin plate has the through hole that connects above-mentioned charge storage element and raised part.
Description of drawings
Fig. 1 is the exploded view according to prismatic cell of the present invention;
Fig. 2 is the amplification sectional view as the square tube of the inscape of above-mentioned prismatic cell;
Fig. 3 is the sectional view of above-mentioned prismatic cell;
Fig. 4 be Fig. 3 want portion's enlarged drawing;
Fig. 5 is the sectional view of wanting portion as the closed shell of the inscape of above-mentioned prismatic cell;
Fig. 6 A and Fig. 6 B are the Action Specification figure as the protuberance of wanting portion of above-mentioned prismatic cell;
Fig. 7 A～Fig. 7 D is the comparison diagram of existing lid and lid of the present invention;
Fig. 8 is the comparison diagram of amount of deflection of the central position of above-mentioned lid;
Fig. 9 is the comparison diagram of stress of the central position of above-mentioned lid;
Figure 10 is as the lid of wanting portion of above-mentioned prismatic cell and the exploded perspective view of resin plate;
Figure 11 is the Action Specification figure of above-mentioned lid and resin plate; And
Figure 12 is the sectional view of existing storage battery.
Embodiment
As shown in Figure 1, prismatic cell 10 is made of following, that is: corrugated square tube 11; The lid 12 of one side, it is installed on this square tube 11 in advance; Charge storage element 16, wherein adjacent metal paper tinsel 13,13 keeps a little gap and stacked, is connected with L font pattern set electroplax 15,15 via many lead-in wires 14, and charge storage element 16 forms rectangular shape as a whole; Electrode bar 17,18, its upper surface and lower surface from this charge storage element 16 extends; Resin plate 20,20, it is made of the flat part 21 and the skirt section 23 that are provided with porose 22; The lid 25 of opposite side, it has the encapsulant 24 of ring-type; Packing ring 26 and nut 27A, it is embedded on the above-mentioned electrode bar 17; And packing ring 26 and nut 27B, it is embedded on the above-mentioned electrode bar 18.In addition, the lid 12 of a side also has encapsulant 24.
That is, above-mentioned resin plate 20 constitutes by the flat part 21 that has macropore 22 with from the skirt section 23 that these flat part 21 bendings form.
And,,, just can be set on the charge storage element 16 as long as flat part 21 is placed on the upper surface or lower surface of charge storage element 16 of rectangular shape for resin plate 20.
As shown in Figure 2, expectation is that square tube 11 is used the insulative resin covered metal plate that is coated with PET insulating material 29,29 such as (polyethylene terephthalate) on the two sides of the metallic plate 28 of aluminium etc.
As shown in Figure 3, prismatic cell 10 is made of following, that is: the charge storage element 16 of rectangular shape; Closed shell 30, it comprises square tube 11 of surrounding this charge storage element 16 and the lid 12,25 of closing the opening of this square tube 11; And resin plate 20,22, it is made of the hard resin with insulating properties, is inserted in clearance t between above-mentioned closed shell 30 and the above-mentioned charge storage element 16, the t, is used to limit moving of above-mentioned charge storage element 16.
When supposing that the left and right directions of above-mentioned resin plate 20 in figure moves, coming off only otherwise from the upper surface of the charge storage element 16 of rectangular shape or lower surface gets final product.As long as skirt section 23 hangs on the charge storage element 16,, do not worry that resin plate 20 comes off from the upper surface or the lower surface of charge storage element 16 even size is short yet.That is, owing to can shorten the size in skirt section 23, thereby can realize the miniaturization and the lightweight of resin plate 20 easily.
Suppose that the collector plate 15 that constitutes the upper surface of charge storage element 16 rotates with nut 27A when nut 27A is screwed in electrode bar 17.The effect of being brought into play the resin plate 20,20 of spline effect this moment is elaborated.
Fig. 4 be Fig. 3 want portion's enlarged drawing, under the situation that hypothesis set electroplax 15 moves left towards figure, the skirt section 23 of extending along square tube 11 prevents to move.As a result, even rotation nut 27A (Fig. 3) does not worry collector plate 15 rotations yet.Nut 27B too.
In order to carry out this spline, as long as use hard and thin resin plate 20.And the diameter (size of the left and right directions among the figure) that the internal diameter of square tube 11 (inside dimension) can be set charge storage element 16 for adds the size behind 2 times of thickness of resin plate 20.Because skirt section 23 is thin, thereby can suppress the diameter of square tube 11, can realize the minor diameterization of storage battery.
And, because the size in skirt section 23 is short, thereby can between the external diameter of the internal diameter of square tube 11 and charge storage element, form the gap, can be effectively as taking in from the space of the gas of generations such as electrolyte.
And, because the planar portions 21 that makes resin plate 20 is between the lid 25 and collector plate 15 of opposite side, thereby can suppress moving up and down of charge storage element 16.
In addition, adopt resin-covered metal sheets, can realize insulation between square tube 11 and the charge storage element 16 by resin coating by making square tube 11.Yet, when current collection element 16 is directly contacted with square tube 11, understand the caused expansion of interior pressure of or square tube 11 flexible etc. owing to the heat of current collection element 16, make use between long-term after, the resin molding (insulating material 29 of Fig. 2) that covers on the inner surface of square tube 11 weares and teares, peels off, and causes defective insulation.
About this point, in the present invention, can make resin molding (insulating material 29 of Fig. 2) and resin plate 20 both sides bring into play insulating effect.Just in case resin molding (insulating material 29 of Fig. 2) is peeled off, owing to kept the insulation function of resin plate 20, thereby do not worry causing defective insulation.
Therefore, can make two kinds of effects of resin plate 20 performance spline effects and insulating effect.
And the shape and size of resin plate 20 are arbitrarily.And, also can adopt the not no covered metal plate of covering insulating resin film on square tube.
Below, the shape of portion of closed shell 30 is described.
As shown in Figure 5, the lower surface of lid 12 is called basal plane 31.Along towards the direction of top, give prominence to formation protuberances 32,32 from lid 12 away from the charge storage element shown in the imaginary line 16.
The volume of the recess 34,34 that is formed by protuberance 32 is added on the formed space 33, gap of charge storage element 16 and square tube 11.The volume increase that recess 34,34 is realized can reach closed shell 30 internal volume 5～10%.Because volume increases, even thereby the electrolyte gasification, the pressure of gas changes also slow, the pressure and the pressure oscillation that can alleviate the inner surface that acts on closed shell 30.
And, adopt flange crimping that lid 12 is installed on the square tube 11.Under the situation of bead tool, be necessary to make lid 12 (to scheme the below) near L1 to the inside from the end of square tube 11.Protuberance 32 of the present invention is given prominence to L2 from basal plane 31, yet makes this L2 be no more than L1.As a result, can make directly connection easily between a plurality of square tubes 11.
Below, according to Fig. 6 the effect of protuberance 32 is described.In addition, lid 12 and protuberance 32 should be inquired into by three-dimensional structure, however the Structure Calculation complexity.Therefore, for convenience's sake, lid 12 and protuberance 32 are replaced as two-dimentional " beam ".
That is, Fig. 6 A illustrates the lid 12 (except the protuberance) that basal plane 31 and lower surface contact with this basal plane 31.And Fig. 6 B schematically shows basal plane 31 and from the protuberance 32 of these basal plane 31 distance L 2.
As shown in Figure 6A, the linear foot of lid 12 cun (thickness) is that the cross section second moment Ia of h and the crossfoot lid 12 when cun being b is bh
3/ 12.
And, shown in Fig. 6 B, be decided to be Ia+ (bh) * (L2) from the cross section second moment Ib of the protuberance 32 of basal plane 31 distance L 2
2That is, the existence owing to protuberance 32 makes the cross section second moment increase (bh) * (L2)
2
Because the cross section second moment is big more, amount of deflection is just more little, thereby the amount of deflection of Fig. 6 B is littler than Fig. 6 A.
And it is big more to make the cross section second moment multiply by the section factor of distance component gained, and bending stress is just more little.Therefore, stress ratio Fig. 6 A of Fig. 6 B is little.
As mentioned above, protuberance is brought into play the effect that reduces amount of deflection and reduce stress (bending stress).
Fig. 7 A one Fig. 7 D is the comparison diagram that existing lid and lid of the present invention are compared, and Fig. 7 A illustrates the lid 111 with protuberance.This lid 111 is called comparative example 1.Fig. 7 B illustrates the lid 113 of the protuberance 112 with ring-type.The lid 113 of the protuberance 112 with ring-type is called comparative example 2.
Fig. 7 C is illustrated in four jiaos of lids 12 with protuberance 32 of I font.This lid 12 is called embodiment 1.Fig. 7 D is illustrated in four jiaos of lids 12 with leg-of-mutton protuberance 32.This lid 12 is called embodiment 2.
Comparative example 1,2 and embodiment 1,2 have implemented Structure Calculation according to following condition.
Zero design conditions:
The size in length and breadth of lid: 60mm * 60mm
The size of medium pore: 23mm
The thickness of lid: 0.5mm
The material of lid: JIS A3004-O
Load (interior pressure): 0.6MPa
The shape of protuberance, size: with reference to Fig. 7 A-Fig. 7 D
Lid is made as three-dimensional " face ", periphery is fixed, apply weight with distributing, calculate amount of deflection and stress.According to Fig. 8 and Fig. 9 this result of calculation is described.
As shown in Figure 8, the amount of deflection of the central position of lid surpasses 2mm in comparative example 1, and comparative example 2 is about 1.7mm.Embodiment 1 is about 1.8mm, is a bit larger tham comparative example 2.Embodiment 2 is about 1.4mm, the amount of deflection minimum.
And as shown in Figure 9, about the stress of the central position of lid, comparative example 1 is about 1300MPa, and comparative example 2 is about 1100MPa.By contrast, embodiment 1 is about 950MPa, and less than comparative example 2, embodiment 2 is about 800MPa, is minimum.
Therefore, the amount of deflection minimum of embodiment 2 and stress minimum.
Distinguish that from above compare with the protuberance (Fig. 7 B symbol 112) of existing known ring-type, the protuberance 32 (Fig. 5 C, Fig. 5 D) that four jiaos of each side of the present invention are provided with can suppress amount of deflection and stress.In view of the above, also we can say, compare, make between the protuberance that to separate structurally be good with continuous protuberance (protuberance of ring-type).
Below, the form of preferred resin plate 20 is described.
As shown in figure 10, resin plate 20 has leg-of-mutton through hole 36 at flat part 21 four jiaos.
12 pairs of resin plate 20 and lids are punctual when making, and as shown in figure 11, through hole 36 overlaps with protuberance 32.Charge storage element 16 is connected with recess 34 via through hole 36.The gas inside that accumulates in square tube 11 arrives recess 34 by through hole 36.Because pressure can directly discharge to recess 34, thereby can relax the interior pressure variation that causes by gas.
In addition, prismatic cell 10 of the present invention is so long as chargeable electric components such as secondary cell, electrolytic capacitor, capacitor are irrelevant with kind.
Prismatic cell according to the present invention can be used as the secondary cell that is installed on the vehicle.
Claims (7)
1. a prismatic cell is characterized in that, this prismatic cell is made of following:
The charge storage element of rectangular shape;
Closed shell, the lid that it comprises the square tube of surrounding above-mentioned charge storage element and closes the opening of this square tube; And
Resin plate, it is made of the hard resin with insulating properties, is inserted between above-mentioned closed shell and the above-mentioned charge storage element, is used to limit moving of above-mentioned charge storage element.
2. storage battery according to claim 1 is characterized in that, above-mentioned resin plate is made of following:
Flat part, it is parallel to above-mentioned lid and disposes; And
The skirt section, it is from the rectangular bending of this flat part, is parallel to above-mentioned square tube and disposes.
3. storage battery according to claim 1 is characterized in that, the side in above-mentioned square tube and the above-mentioned lid is made of following:
Metallic plate; And
The insulative resin film, it covers on this metallic plate.
4. storage battery according to claim 1 is characterized in that, above-mentioned lid has from the outstanding protuberance of the basal plane of square plate at four jiaos.
5. storage battery according to claim 4 is characterized in that, raised part is outstanding towards the direction away from above-mentioned charge storage element.
6. storage battery according to claim 4 is characterized in that above-mentioned lid is installed on the square tube, makes above-mentioned basal plane and raised part not exceed the end of above-mentioned square tube.
7. storage battery according to claim 5 is characterized in that, above-mentioned resin plate has the through hole that connects above-mentioned charge storage element and raised part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP144559/2005 | 2005-05-17 | ||
| JP144689/2005 | 2005-05-17 | ||
| JP2005144559 | 2005-05-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101099257A true CN101099257A (en) | 2008-01-02 |
| CN100508268C CN100508268C (en) | 2009-07-01 |
Family
ID=39012122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006800018070A Expired - Fee Related CN100508268C (en) | 2005-05-17 | 2006-05-16 | Rectangular storage battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100508268C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010127542A1 (en) * | 2009-05-08 | 2010-11-11 | 深圳市比克电池有限公司 | Cylindrical battery and method for manufacturing the same |
| CN104795513A (en) * | 2014-01-20 | 2015-07-22 | 三星Sdi株式会社 | Battery pack |
| CN105556736A (en) * | 2013-08-30 | 2016-05-04 | 日本碍子株式会社 | Secondary cell |
| WO2023070523A1 (en) * | 2021-10-29 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electric device, and method and apparatus for manufacturing battery cell |
-
2006
- 2006-05-16 CN CNB2006800018070A patent/CN100508268C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010127542A1 (en) * | 2009-05-08 | 2010-11-11 | 深圳市比克电池有限公司 | Cylindrical battery and method for manufacturing the same |
| CN105556736A (en) * | 2013-08-30 | 2016-05-04 | 日本碍子株式会社 | Secondary cell |
| CN105556736B (en) * | 2013-08-30 | 2018-01-30 | 日本碍子株式会社 | Secondary cell |
| CN104795513A (en) * | 2014-01-20 | 2015-07-22 | 三星Sdi株式会社 | Battery pack |
| CN104795513B (en) * | 2014-01-20 | 2020-10-30 | 三星Sdi株式会社 | Battery pack |
| WO2023070523A1 (en) * | 2021-10-29 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electric device, and method and apparatus for manufacturing battery cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100508268C (en) | 2009-07-01 |
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Granted publication date: 20090701 Termination date: 20140516 |