CN201584453U - Cylindrical secondary battery and positive plate thereof - Google Patents
Cylindrical secondary battery and positive plate thereof Download PDFInfo
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- CN201584453U CN201584453U CN201020056700XU CN201020056700U CN201584453U CN 201584453 U CN201584453 U CN 201584453U CN 201020056700X U CN201020056700X U CN 201020056700XU CN 201020056700 U CN201020056700 U CN 201020056700U CN 201584453 U CN201584453 U CN 201584453U
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- plane
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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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- Sealing Battery Cases Or Jackets (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model discloses a cylindrical secondary battery and a positive plate thereof. The positive plate comprises a foam-shaped plate substrate and positive activated substances embedded on the positive plate substrate, the positive plate is provided with a main body portion with certain thickness, a front end and a rear end, wherein the thickness of the front end is thinner than that of the main body portion, and the thickness of the rear end is thinner than that of the main body portion. The positive plate can effectively reduce ovality of a polar group, namely reduces difference value between the largest diameter and the lowest diameter, reduces assembly of the polar group, is more favorable for the polar group to be placed into the casing, is particularly favorable for manufacturing high-capacity cylindrical batteries, and provides a usable space for increasing battery property. Thicknesses of the positive plate and a negative plate can be increased, and increment of the thicknesses of the plates is mainly used for increasing quantity of positive and negative activated substances, thereby being capable of improving battery property on the premise of guaranteeing the outer diameter of the battery to meet an IEC requirement, and particularly increasing capacity, inner resistance and service life properties of the battery.
Description
Technical field
The utility model relates to a kind of cylindrical battery and positive plate thereof, especially relates to a kind of nickel electrode cylinder type secondary battery and positive plate thereof.
Background technology
Secondary cell changes into chemical energy with electric energy in each charging, convert chemical energy to electric energy in the time of each the discharge, but more and more receives human concern as a kind of inverse conversion of energy and the device of storage.Especially the high-energy Ni-H cell of cleanliness without any pollution.Ni-H cell is divided into three kinds on button type, column type, square from its mode of appearance.Wherein cylindrical battery is good because of the high and horizontal crushing resistance of its space availability ratio, it is low but also to have overcome the horizontal crushing resistance of square battery housing poor not only to have overcome button type battery capacity, the deficiency of the horizontal easy bulging of housing, so the application of column type Ni-H cell is much larger than other two kinds of shape Ni-H cells.
At present column type Ni-H cell coiling cross section structure as shown in Figure 1, mainly by positive plate 2, negative plate 4, barrier film 3, battery container 5, and electrolyte and cap sealed circle are formed.Negative plate 4 encases positive plate 2 from length direction and Width fully by barrier film 3, and end one circle negative plate 4 contacts with battery container 5.For preventing to be short-circuited, generally be to adopt micromesentery to strengthen the puncture resistance of barrier film at the big volume core place of coiling crackle.By positive plate 2, negative pole 4, barrier film 3 has ellipticity by the utmost point group body C that is wound into web-like, and utmost point group body C has the outer diameter D of maximum near the extended line A1A2 of the outer anodal coiling A1 of end and the line at coiling center that reels
Max, utmost point group body C has the outer diameter D of minimum near the extended line B1B2 that is close to anodal the reel outside of finishing A1 and the line at coiling center
MinTherefore when utmost point group body C went into housing 5, it is the tightst that the A1A2 two ends contacts with housing, and B1B2 near the end of B1 owing to contact the tight cavity E that do not formed, this cavity E belongs to the waste of the interior useful space of housing.Because existence or this cavity E volume of this cavity E are too big, reduced the utilance of housing 5 splendid attire cell active materials, limited the further lifting of battery performance.
The utility model content
A technical problem to be solved in the utility model is to overcome existing utmost point group C and the not high defective of housing 5 utilances, from the internal structure and the process modification aspect of battery, the cylindrical Ni-H cell that proposes a kind of Ni-H cell positive plate and adopt this positive plate.
For the Ni-H cell positive plate, technical problem of the present utility model is solved by the following technical programs:
A kind of cylinder type secondary battery positive plate, comprise that foam-like pole piece matrix and embedding ooze the positive active material on the positive plate matrix, it is characterized in that: described positive plate has certain thickness main part, has thickness than the thin front end of main part and have the thickness rear end thinner than main part.
Preferably: the front end of described positive plate has preceding transverse plane or front end inclined-plane, and vertical section intersected formation front end angle before it and positive plate main part were reeled; The tail end of described positive plate has tail end plane or tail end inclined-plane, and vertical section intersected formation rear end angle before it and positive plate main part were reeled; Described corner dimension is between the 0-90 degree.
The utility model also proposes a kind of cylinder type secondary battery, comprise positive plate, described positive plate comprises that foam-like pole piece matrix and embedding ooze the positive active material on the positive plate matrix, it is characterized in that: described positive plate has certain thickness main part, has thickness than the thin front end of main part and have the thickness rear end thinner than main part.
Preferably: the front end of described positive plate has preceding transverse plane or front end inclined-plane, and vertical section intersected formation front end angle before it and positive plate main part were reeled; The tail end of described positive plate has tail end plane or tail end inclined-plane, and vertical section intersected formation rear end angle before it and positive plate main part were reeled; Described corner dimension is between the 0-90 degree.
Further preferably: described positive plate is after being wound into web-like utmost point group, and the preceding transverse plane of anodal fore-end or front end inclined-plane be back to the coiling center, promptly before transverse plane or front end inclined-plane with face mutually by the negative plate of barrier film and outer ring, with the coiling center back to; Described positive plate is after being wound into web-like utmost point group, and the tail end plane of anodal rear end or tail end inclined-plane are back to the coiling center position, and promptly tail end plane or tail end inclined-plane are faced mutually with the housing of most proximal end, with the coiling center back to.
Further preferably: described cylinder type secondary battery is HR 15/51 battery, and its housing external diameter is between 14.10mm-14.30mm, and described housing wall thickness is between 0.10mm-0.15mm.
The beneficial effect that the utility model is compared with the prior art is:
(1) employing has certain thickness main part D, than the thin front end D of main part
0With rear end D
1The positive plate that three part-structures are formed, can effectively reduce utmost point group ovality, promptly reduce the difference of maximum gauge A1A2 and minimum diameter B1B2, reduced the assembling degree of utmost point group, be more conducive to utmost point group and put into housing, especially help the manufacturing of high capacity cylindrical battery, after reducing utmost point group ovality, provide available space for improving battery performance, can increase the thickness of positive/negative plate, the increase of pole piece thickness is mainly used in the amount that increases the both positive and negative polarity active material, thereby can improve battery performance, especially improve the capacity of battery, the performance in internal resistance and life-span.
Description of drawings:
Fig. 1 is the cross section structure chart after existing column type Ni-H cell is reeled.
Cross section structure chart after Fig. 2 the utility model embodiment column type Ni-H cell is reeled.
The existing positive plate of Fig. 3 is along the profile of length-thickness direction.
Fig. 4 the utility model positive plate is along the profile of length-thickness direction.
Specific embodiments
For the utility model battery anode slice, its technical problem is solved by following further technical scheme:
Described utility model positive plate is by mechanical mode positive active material to be comprised that additive and binding agent are filled into that (small part is attached to its surface in the anodal foaming Ni substrate, common amount below 10%) after, wet processing is through oven dry, after dry process directly is rolled into the pole piece of desired thickness D, it is cut into behind the monolithic existing pole piece as Fig. 3, through mechanical systems such as cutting, polishing or polishing positive pole is processed into the pole piece of Fig. 4 structure, positive plate promptly of the present utility model then.
This Ni-H cell positive plate comprises that anodal matrix of foam-like and embedding ooze the positive active material on the anodal matrix of foam-like.
The characteristics of this Ni-H cell positive plate are:
Described utility model positive plate has the structure (Fig. 3 is the structure of existing positive plate) as Fig. 4: by having certain thickness main part D, have the thickness front end D thinner than main part
0And have a thickness rear end D thinner than main part
1Three parts are formed, and the 0-0 face is anodal front end D among the figure
0Part is through formed plane of mechanical system or inclined-planes such as cutting, polishing or polishings, and it and positive plate main part D intersect the formation angle theta
0And above-mentioned positive plate is after being wound into web-like utmost point group, anodal front end D
0The part the 0-0 face back to the coiling center, promptly the 0-0 face with face mutually by the negative plate of barrier film and outer ring, with the coiling center back to.The 0-0 face is owing to thin thickness, and it contacts with negative pole with the barrier film of outer ring lacks, and can effectively reduce the ovality of utmost point group, promptly reduces the difference of A1A2 and B1B2 place diameter; The 1-1 face is anodal tail end D among the figure
1Part is through formed plane of mechanical system or inclined-planes such as cutting, polishing or polishings, and it and positive plate main part D intersect the formation angle theta
1, above-mentioned positive plate is after being wound into web-like utmost point group, the 1-1 face of anodal rear end is back to the coiling center position, promptly the 1-1 face is faced mutually with the housing of most proximal end, with the coiling center back to.The 1-1 face is owing to thin thickness, and the back end that reels becomes just round transition, effectively reduces the ovality of utmost point group, promptly reduces the difference of A1A2 and B1B2 place diameter.0-0 face and 1-1 face integrate, and greatly the ovality of the reduction battery of degree has reduced the volume of B1B2 near B1 end formation cavity E, has increased the utilance of housing 5 splendid attire active materials, thereby provides available space for improving battery performance.
Described angle theta
0, θ
1θ can be changed arbitrarily between the 0-90 degree
0, θ
1Can keep equal, also can be unequal.
On the other hand, further raising along with the Ni-H cell capacity, the external diameter of housing 5 is also continuing to increase, present (the Intemational Eletrotechnical Commission of International Electrotechnical Commission, hereinafter to be referred as IEC) described HR 15/51 class (hereinafter to be referred as the AA class) battery, through external diameter≤14.10 of statistics and the used housing of investigation industry, the wall thickness of housing is between 0.15mm-0.20mm.According to the IEC standard, behind the battery packages, its external diameter will satisfy: 14.5
+ 0 -0.7Mm, so the external diameter of housing can not unlimited increase extremely, when housing reaches certain external diameter, for increasing enclosure interior volume so that fill more active material, need be with the wall thickness of housing attenuate as much as possible.
Another technical problem to be solved in the utility model is, overcomes the existing little defective of enclosure interior volume, and it is bigger to propose a kind of external diameter, housing that wall thickness is thinner and the manufacture method that adopts the Ni-H cell of this housing.
Bigger its external diameter of housing of described external diameter has different external diameters according to battery different classes of, and the utility model is including but not limited to the housing of the described HR 15/51 class battery of IEC.The utility model proposes HR 15/51 class (hereinafter to be referred as the AA class) housing external diameter [it is littler than the desired maximum of IEC to can be understood as diameter of the housing with respect to other type, but difference is less than 0.4mm] between 14.10mm-14.30mm.The utility model proposes wall thickness more the wall thickness of thin walled shell between 0.10mm-0.15mm.
For the thinner housing of the bigger wall thickness of external diameter, technical problem of the present utility model is solved by following further technical scheme:
For the utility model housing for existing housing, under the identical situation of existing case material, can realize this utility model housing through size and the number of drawing of adjusting the pull and stretch grinding tool, particularly, pull and stretch grinding tool punch external diameter and die internal diameter are increased 0-0.20mm, and number of drawing increases 0-10 time.This housing can guarantee effectively that by assembling with positive plate collocation of the present utility model the battery external diameter meets the IEC requirement.
The beneficial effect that the utility model is compared with the prior art is:
(2) adopt the thinner housing of the bigger wall thickness of external diameter that the utility model proposes, effectively increased the internal capacity of housing, thereby reduced the assembling degree of utmost point group, help utmost point group and put into housing, especially be beneficial to the manufacturing of high capacity battery.The internal capacity of housing increases, after utmost point assembling degree of joining reduces, provide available space for improving battery performance, can increase the thickness of positive/negative plate, the increase of pole piece thickness is mainly used in the amount that increases the both positive and negative polarity active material, thereby help improving battery performance, especially improve the performance in the capacity life-span of battery.
For the manufacturing of the utility model battery, following steps are arranged successively:
(1) makes positive and negative plate; (2) assembled battery; (3) battery changes into.
The characteristics of the utility model cell manufacturing method are:
Described manufacturing positive and negative plate comprises that the existing anode pole piece (as shown in Figure 3) that will make is processed into the certain thickness main part D that has shown in Figure 4 by mechanical systems such as cutting, polishing or polishings before the battery assembling, than the thin front end D0 of main part and the positive plate of rear end D1 three part-structures.
Described assembled battery is to adopt positive plate of the present utility model and negative pole and barrier film to put into housing of the present utility model after being wound into web-like utmost point group, through annotating electrolyte, the block sealing ring is installed again, seals and is assembled into the sealing cylindrical battery.
The high power capacity AA Ni-H cell of the column type that the utility model method is made and the existing AA Ni-H cell contrast test data such as the table 1～table 3 of control group.Except that the manufacturing and housing collocation of positive plate, other technology condition is all made under same process conditions and environment.
AA type Ni-H cell designs from following 6 kinds of schemes, existing positive plate of contrast and mill front and back end positive plate, and the performance of the battery that existing housing and the different collocation between the thinner housing of the bigger wall thickness of external diameter are assembled:
Scheme 4 adopts the positive pole of existing structure, increases positive active material 0.2g on the basis of scheme 1, and the thinner housing of the collocation bigger wall thickness of external diameter assembles;
Scheme 6 adopts the positive pole of front and back end edging structure, on the basis of scheme 3, increases the thinner housing of the positive powder 0.2g collocation bigger wall thickness of external diameter and assembles.
More than positive plate and the housing parameter such as the table 1 of six Battery packs:
Table 1
After scheme 1～6 battery winding is put into housing, maximum outside diameter A1A2 with digital slide calliper rule test housing, with minimum outer diameter B1B2, calculate its difference A1A2-B1B2, it is oval degree, through the thick outer tube of packing 0.06mm, test battery contains the outside diameter d of the maximum outside diameter of sleeve pipe as battery, its test result such as table 2 after changing into:
Table 2
Table 3
From table 1-table 3 as can be seen:
Adopt the battery of identical casings, positive plate front and back end edging technology than the little 0.2mm of the oval degree of existing technology about, about the little 0.11mm of battery external diameter, battery 0.5C cycle life improves [scheme 2 and scheme 1, scheme 5 and scheme 4 contrast] about 20 weeks.
After increasing battery capacity, the existing technology battery external diameter of positive plate surpasses IEC and requires 0.06mm[scheme 4], and positive plate front and back end edging technology battery external diameter meets IEC requirement [scheme 5, scheme 6].
Adopt anodal edging technology, more the battery of thin walled shell is than existing housing battery for the bigger wall thickness of external diameter, and capacity can improve 56mAh[scheme 6 and scheme 3 contrasts].
This shows, adopt the utility model scheme, promptly adopt the bigger wall thickness of positive plate edging technology collocation external diameter more the scheme of thin walled shell can improve battery capacity and cycle life.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations, other cylinder type secondary battery of IEC defined especially.For the utility model person of an ordinary skill in the technical field, not breaking away under the prerequisite of the utility model design, can also make some simple deduction or replace, all should be considered as belonging to the utility model by being submitted to.
Claims (6)
1. cylinder type secondary battery positive plate comprises that foam-like pole piece matrix and embedding ooze the positive active material on the positive plate matrix, and it is characterized in that: described positive plate has certain thickness main part (D), has the thickness front end (D thinner than main part
0) and have the thickness rear end (D thinner than main part
1).
2. according to the described secondary battery positive plate of claim 1, it is characterized in that: the front end (D of described positive plate
0) having preceding transverse plane or front end inclined-plane (0-0), vertical section intersected formation front end angle (θ before it and positive plate main part (D) were reeled
0); Tail end (the D of described positive plate
1) having tail end plane or tail end inclined-plane (1-1), vertical section intersected formation rear end angle (θ before it and positive plate main part (D) were reeled
1); Described angle (θ
0, θ
1) size is between the 0-90 degree.
3. cylinder type secondary battery, comprise positive plate, described positive plate comprises that foam-like pole piece matrix and embedding ooze the positive active material on the positive plate matrix, and it is characterized in that: described positive plate has certain thickness main part (D), has the thickness front end (D thinner than main part
0) and have the thickness rear end (D thinner than main part
1).
4. according to the described secondary cell of claim 3, it is characterized in that: the front end (D of described positive plate
0) having preceding transverse plane or front end inclined-plane (0-0), vertical section intersected formation front end angle (θ before it and positive plate main part (D) were reeled
0); Tail end (the D of described positive plate
1) having tail end plane or tail end inclined-plane (1-1), vertical section intersected formation rear end angle (θ before it and positive plate main part (D) were reeled
1); Described angle (θ
0, θ
1) size is between the 0-90 degree.
5. according to the described secondary cell of claim 4, it is characterized in that: described positive plate after being wound into web-like utmost point group, anodal front end (D
0) the preceding transverse plane of part or front end inclined-plane (0-0) be back to the coiling center, promptly before transverse plane or front end inclined-plane (0-0) with face mutually by the negative plate of barrier film and outer ring, with the coiling center back to; Described positive plate is after being wound into web-like utmost point group, and the tail end plane of anodal rear end or tail end inclined-plane (1-1) are back to the coiling center position, and promptly tail end plane or tail end inclined-plane (1-1) face mutually with the housing of most proximal end, with the coiling center back to.
6. according to the described secondary cell of claim 5, it is characterized in that: described cylinder type secondary battery is HR 15/51 battery, and its housing external diameter is between 14.10mm-14.30mm, and described housing wall thickness is between 0.10mm-0.15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020056700XU CN201584453U (en) | 2010-01-19 | 2010-01-19 | Cylindrical secondary battery and positive plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020056700XU CN201584453U (en) | 2010-01-19 | 2010-01-19 | Cylindrical secondary battery and positive plate thereof |
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| Publication Number | Publication Date |
|---|---|
| CN201584453U true CN201584453U (en) | 2010-09-15 |
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ID=42726465
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020056700XU Expired - Lifetime CN201584453U (en) | 2010-01-19 | 2010-01-19 | Cylindrical secondary battery and positive plate thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280603A (en) * | 2013-06-03 | 2013-09-04 | 深圳市量能科技有限公司 | High-capacity nickel-metal hydride battery and production method thereof |
-
2010
- 2010-01-19 CN CN201020056700XU patent/CN201584453U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280603A (en) * | 2013-06-03 | 2013-09-04 | 深圳市量能科技有限公司 | High-capacity nickel-metal hydride battery and production method thereof |
| CN103280603B (en) * | 2013-06-03 | 2015-11-18 | 深圳市量能科技有限公司 | A kind of high-capacity nickel-hydrogen battery and preparation method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100915 |
|
| CX01 | Expiry of patent term |