CN201877505U - Anode and cathode current collector for secondary batteries - Google Patents
Anode and cathode current collector for secondary batteries Download PDFInfo
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- CN201877505U CN201877505U CN2010206081851U CN201020608185U CN201877505U CN 201877505 U CN201877505 U CN 201877505U CN 2010206081851 U CN2010206081851 U CN 2010206081851U CN 201020608185 U CN201020608185 U CN 201020608185U CN 201877505 U CN201877505 U CN 201877505U
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- connecting plate
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- battery
- current collector
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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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Abstract
The utility model discloses an anode and cathode current collector for secondary batteries, which comprises a connecting pole and a connecting plate. The connecting pole is arranged at the upper end of the connecting plate, and more than one toothed groove used for penetrating into one end of an electrode lug is disposed on the connecting plate. Reliability of welding among electrode lugs and the current collector is enhanced, welding performance is improved, accordingly large-current charge-discharge performances of the secondary batteries produced by the aid of the anode and cathode current collector are evidently improved, and production and process requirements of current electric automobile batteries can be met. The anode and cathode current collector is simple in process and tooling, low in manufacturing cost, and suitable for popularization and utilization, and has rather high practical value.
Description
Technical field
The utility model relates to a kind of secondary cell profile of tooth collector, is mainly used in Ni-MH battery, nickel-cadmium cell, lithium battery production field, also can be applicable to the ultracapacitor production field.
Background technology
The development of battery technology is maked rapid progress, and particularly the twentieth century posterior lobe makes battery technology and manufacture level reach a new level based on the birth and the development of the secondary cell of NI-G, ni-mh, lithium ion etc.With respect to low, the not re-usable shortcoming of primary cell power density, secondary cell can repeat to discharge and recharge, and has than the long life, and this makes on the earth Limited resources bring into play bigger purposes, has also reduced the pressure of battery production to environment simultaneously.
Along with the continuous development of secondary cell new technology, new technology, new material, battery performance is greatly improved, and the human for many years fuel oil-free car of dream always just day by day comes true.Now, ten hundreds of is just running quickly street and lane all over the world of the new-energy automobile of power with the secondary cell.Farther, the more of a specified duration of usefulness faster, that run that run are the targets that new-energy automobile is constantly pursued.
The new target of new-energy automobile to automobile heart component---battery is had higher requirement, particularly automobile start, needed instantaneous large-current when quickening, require battery must possess high power density, can in the extremely short time, provide automobile required under given conditions big electric current.Stem-windingly be, pass through China battery industry professional's unremitting effort for many years, the heavy-current discharge performance of battery has obtained remarkable lifting.The improvement of the adjustment of cell size prescription, optimal design, electrolyte and the barrier film of pole plate shape etc. all effectively raise the heavy-current discharge performance of battery.
By reducing the thickness of positive/negative plate, increase the sheet number of pole plate, to increase the effective surface area that pole plate discharges and recharges reaction, be one of effective way that improves the battery high-rate performance.As being example with a 25Ah Ni-MH battery, in identical assembly space, by reducing electrode thickness, the polar plate number is increased to present 43 (21 of positive plates, 22 of negative plates) by original 29 (14 of positive plates, 15 of negative plates).Compare with original 29 pole plate batteries, the battery high-rate performance of 43 pole plates has improved more than 30%.The secondary cell of one constant volume, by increasing the polar plate number, improved the battery charging and discharging performance effectively, satisfied the electric automobile starting, when quickening to the high power requirement of battery, while battery high power performance, can reach the purpose that reduces the battery charge time by suitably improving the charging current size.
Generally speaking, pole plate (3) upper end is welded with lug (2), and the lug of alkaline secondary cell is nickel sheet or nickel plating steel disc, and its thickness is between 0.05mm～0.2mm.The lug of some carries out afflux by both positive and negative polarity collector (1) respectively again, then directly external the or external terminal (seeing accompanying drawing 1) again of collector.A battery generally has only positive and negative each terminal, and battery carries out the input and output of electric energy by the both positive and negative polarity external terminal.More than each parts form a utmost point group, utmost point group goes into shell, just form a semi-finished product battery after sealing.
Along with the increase of polar plate number, control the bonding strength between lug (2) and the collector (1) effectively, reduce contact resistance between the two, this is one of key technology of battery production manufacturing.At present, the collector (1) of general producer is designed to "+" shape structure, because "+" shape structure collector (1) bottom has only a tooth (4), the lug of multi-disc pole plate (2) must be through the external force effect, and (5) utilize percussion welder and collector (1) to weld in the welding position after bending to arc.Lug (2), particularly outermost lug because of deformation is bigger, makes the bigger stress of generation between lug and the pole plate, and this is to cause pole plate short circuit, lug and pole plate fracture, and finally causes the main reason of battery failure.
Therefore, by improving the contour structures and the welding procedure of battery afflux liquid, provide to be fit to the collector that lug is connected with collector, effective reduction contacts internal resistance, and increase soldering reliability, just become technology and technological problems that the secondary cell production field is bitten needs solution.
Summary of the invention
The purpose of this utility model is to have only a tooth usually at existing secondary cell collector, and the lug on the pole plate can cause the lug distortion of utmost point group both sides serious when tooth on the collector is connected, and lug produces bigger internal stress because of deformation; In battery production and use, the steel band of lug and pole plate connecting portion easily punctures barrier film and causes the positive/negative plate short circuit; The bonding strength of stored energy welding simultaneously is low, soldering reliability is poor, very easily causes the present situation of rosin joint, dry joint phenomenon in the production process, the collector of a kind of convenience that provides, feasible multiple tooth shape.The utility model is in the secondary cell production process, by improvement to positive and negative collector shape and welding method, greatly improve the reliability and the high-rate performance of secondary cell, thereby satisfied required high power, long-life, high reliability features and the requirement of batteries of electric automobile.
The purpose of this utility model can reach by following measure:
A kind of secondary cell both positive and negative polarity collector comprises joint pin and connecting plate, and described joint pin is located at the upper end of described connecting plate, is being provided with on the described connecting plate more than one in order to penetrate the teeth groove of lug one end.
Wherein teeth groove is through to the upper end of connecting plate from the lower end of described connecting plate.The number of teeth groove, can further be selected more than 6 according to the number of pole plate and lug preferably more than two.
Wherein the width of teeth groove is preferably 2.0mm～3.0mm.The part of connecting plate between per two adjacent sheaves forms tooth.
This collector earlier with the number of lug according to teeth groove, is divided into several parts in use as far as possible, and this umber and teeth groove number are consistent.Every part of lug inserts in the teeth groove corresponding with it from the lower end of connecting plate, and pass the upper end of connecting plate, lug exposes connecting plate upper surface 1mm～2mm, adopts the argon arc welding welding that each lug and teeth groove collective are welded together then, and the teeth groove first half of up/down perforation is welded reality on connecting plate.The teeth groove that is positioned at below the joint pin of connecting plate middle part can weld, and the lug at middle part is fixed in the welding that relies on connecting plate two to connect teeth groove.
Weld seam after the above-mentioned welding must be even, plentiful, and weldering Ba Buneng influence cooperating of collector and seal group piece installing, and weld seam must guarantee full weld, with the reduction ohmic internal resistance, and the high-rate performance of raising battery.
1, the utility model is owing to increased the collector number of teeth, lug is welded to connect with the teeth groove collector under free state substantially, greatly reduce the stress of lug (particularly outside lug) root and pole plate connecting portion, solved the short circuit phenomenon that recurrent lug root steel band punctures or crowded broken barrier film causes in secondary cell production and the use effectively.
2, the utility model is owing to change lug and collector connected mode into argon arc welding by common stored energy welding, weld defect and deficiencies such as the rosin joint that stored energy welding connection technology itself exists, dry joint have been overcome, reduce battery contact internal resistance effectively, improved power of battery performance.
3, the utility model has reduced the contact resistance between lug and the collector as much as possible, and it is simple in structure, and cost is low, is suitable for promoting the use of, and has very high use value.
Description of drawings
Fig. 1 is a current collector structure schematic diagram of the present utility model.
Fig. 2 is the utility model collector utmost point group front schematic view.
Fig. 3 is the utility model collector utmost point group side schematic view.
Fig. 4 is the utility model collector utmost point group vertical view.
Fig. 5 is existing general collector utmost point group front schematic view.
Fig. 6 is existing general collector utmost point group side schematic view.
Among the figure, the 1-collector; The 2-lug; The 3-pole plate; The 4-tooth; The 5-teeth groove; The 6-weld seam; The 7-joint pin; The 9-connecting plate; 10-has general collector now; The monodentate of the existing general collector of 11-.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Usually the utmost point group of battery is by forming with the lower part: be connected by lug between positive plate, negative plate, barrier film, collector, pole plate and the collector.Slurry is cut into certain size more on request after applying on certain base material, drying, roll.About the 5mm of the upper edge of pole plate 3, remove the floating powder in surface with wheat flour purifier, when preventing lug 2 with pole plate 3 spot welding or roll welding because of polar board surface spark phenomenon does not take place only.The pole plate 3 that welds lug 2 separates with barrier film between the positive/negative plate according to positive and negative over-over mode lamination, guarantees not short circuit between the pole plate.
Existing collector 10 is a cross, and lug 2 is welded on respectively on the monodentate 11 of existing collector 10 bottoms (seeing accompanying drawing 5,6).
The structure of collector 1 of the present utility model as shown in Figure 1, comprise joint pin 7 and rectangular connecting plate 9 in order to direct external or splicing ear, joint pin 7 is located at the upper end of connecting plate 7 by middle position, is provided with 6 in order to penetrate the teeth groove 5 of lug one end on connecting plate 9.Each teeth groove 5 is through to the upper end of connecting plate 9 from the lower end of connecting plate 9.Wherein the width of teeth groove 5 is 2.0mm～3.0mm.Connecting plate between per two adjacent sheaves 5 partly forms tooth 4.
With square 40Ah Ni-MH battery is example, respectively positive/negative plate lug 2 is divided into 6 parts as far as possible separately, and inserts in the collector 1 corresponding teeth groove 5, is fixed on then in the special weld jig, makes lug 2 upper edges expose the solder side 1mm～2mm of connecting plate upper surface.Adjust the argon arc welding machine parameter and weld, the tooth 4 on lug and the collector is fused fully, guarantee weld seam 6 full welds, smooth, even simultaneously, do not have obviously weldering crust.The lug that is arranged in the teeth groove 5 below the joint pin 7 can weld, and only depends on the teeth groove 5 on both sides and being connected and fixed of lug 2.
The 40Ah Ni-MH battery that the utmost point group who utilizes above-mentioned process to produce assembles, fluid injection changes into the back and carries out heavy-current discharge with the 400A electric current, the heavy-current discharge capacity reaches 98% of 40A current discharge capacity, and is higher by 37.5% than the identical index of same specification battery of common explained hereafter.
The utility model does not relate to part all to be realized with prior art, identical prior art, the technology of maybe can adopting of technology.
Claims (4)
1. a secondary cell both positive and negative polarity collector comprises joint pin and connecting plate, and described joint pin is located at the upper end of described connecting plate, it is characterized in that being provided with on the described connecting plate more than one in order to penetrate the teeth groove of lug one end.
2. secondary cell both positive and negative polarity collector according to claim 1 is characterized in that described teeth groove is through to the upper end of connecting plate from the lower end of described connecting plate.
3. secondary cell both positive and negative polarity collector according to claim 1 and 2, the number that it is characterized in that described teeth groove is more than two.
4. secondary cell both positive and negative polarity collector according to claim 1 and 2, the width that it is characterized in that described teeth groove is 2.0mm～3.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206081851U CN201877505U (en) | 2010-11-15 | 2010-11-15 | Anode and cathode current collector for secondary batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206081851U CN201877505U (en) | 2010-11-15 | 2010-11-15 | Anode and cathode current collector for secondary batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877505U true CN201877505U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206081851U Expired - Fee Related CN201877505U (en) | 2010-11-15 | 2010-11-15 | Anode and cathode current collector for secondary batteries |
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| CN (1) | CN201877505U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315409A (en) * | 2011-08-29 | 2012-01-11 | 潍坊威能环保电源有限公司 | Lithium ion power cell |
| CN104852010A (en) * | 2015-05-14 | 2015-08-19 | 汤瑛华 | Lead-acid cell bus-bar pole and method for performing pole group welding of cell by using the same |
| CN108206260A (en) * | 2016-12-16 | 2018-06-26 | 罗伯特·博世有限公司 | The energy storage of electrode connection with structure space optimization |
| CN110867555A (en) * | 2018-08-27 | 2020-03-06 | 大众汽车有限公司 | Battery cell and method for producing a battery cell |
| CN111834637A (en) * | 2020-07-24 | 2020-10-27 | 江西理工大学 | Flexible lithium ion battery with multi-channel flexible current collector structure for reducing internal resistance and preparation method thereof |
-
2010
- 2010-11-15 CN CN2010206081851U patent/CN201877505U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315409A (en) * | 2011-08-29 | 2012-01-11 | 潍坊威能环保电源有限公司 | Lithium ion power cell |
| CN104852010A (en) * | 2015-05-14 | 2015-08-19 | 汤瑛华 | Lead-acid cell bus-bar pole and method for performing pole group welding of cell by using the same |
| CN108206260A (en) * | 2016-12-16 | 2018-06-26 | 罗伯特·博世有限公司 | The energy storage of electrode connection with structure space optimization |
| CN108206260B (en) * | 2016-12-16 | 2022-08-26 | 罗伯特·博世有限公司 | Electrical energy store with spatially optimized electrode connections |
| CN110867555A (en) * | 2018-08-27 | 2020-03-06 | 大众汽车有限公司 | Battery cell and method for producing a battery cell |
| CN111834637A (en) * | 2020-07-24 | 2020-10-27 | 江西理工大学 | Flexible lithium ion battery with multi-channel flexible current collector structure for reducing internal resistance and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20111115 |