CN202444029U - Composite battery core and lithium ion battery - Google Patents
Composite battery core and lithium ion battery Download PDFInfo
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- CN202444029U CN202444029U CN2012200699972U CN201220069997U CN202444029U CN 202444029 U CN202444029 U CN 202444029U CN 2012200699972 U CN2012200699972 U CN 2012200699972U CN 201220069997 U CN201220069997 U CN 201220069997U CN 202444029 U CN202444029 U CN 202444029U
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- positive pole
- electric core
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a composite battery core and a lithium ion battery, wherein the composite battery core comprises at least two monomer battery cores, each monomer battery core is respectively provided with positive pole lugs (11A, 11B) and negative pole lugs (13A, 13B); the positive pole lugs (11A, 11B) of the monomer battery cores are welded into a whole so as to form a composite batter core positive pole (11) through positive pole lug welding tracks(111) in a curve welding mode; the negative pole lugs (13A, 13B) of the monomer battery cores are welded into a whole so as form a composite battery core negative pole (13) through negative pole lug welding tracks(131) in a curve welding mode; and the lithium ion battery comprises a seal shell (15) and the composite battery core positioned in the seal shell (15). According to the utility model, on the basis that the battery capacity is ensured to be increased, the inner resistance of the whole composite battery core is lowered, and further the technical effects that the inner resistance is lowered and the battery capacity is increased are achieved.
Description
Technical field
The utility model relates to a kind of energy storage components and parts, relates in particular to a kind of compound electric core and lithium ion battery.
Background technology
In recent years, along with the progressively popularization of environmental protection low-carbon (LC) theory, and the develop rapidly of new material and processing and manufacturing technology, the production capacity and the application of lithium ion battery are constantly expanded.It is reported that 2010, the output of China's lithium rechargeable battery reached 2,000,000,000, realize about 20,000,000,000 yuan of income from sales altogether.Its application also from industries such as traditional digital product, electronic toy, UPS to big capacity, high-power application such as industry rapid osmotic such as electric tool, motor vehicle; Expection; Under the promotion of national new-energy automobile development plan " thousand in ten cities " project, several Nian Lihui afterwards are more obvious for this growing trend.The great demand in market is had higher requirement to the specifications and characteristics of lithium ion battery especially electrokinetic cell.
Based on the requirement in market, on specification, lithium ion battery must possess higher capacity to satisfy the needs of vehicles continuation of the journey mileage; On charge-discharge performance, lithium ion battery must possess good multiplying power property and less internal resistance to satisfy the high current charge-discharge demand of the vehicles or other application apparatus; And under the present art; The basic method that improves electric core capacity is to increase content of active substance on the battery plus-negative plate pole piece, because too high surface density will make the reliability of pole piece and electric conductivity reduce, and manufacture process also is not easy operation and monitoring; So control in strictness under the prerequisite of surface density of both positive and negative polarity pole piece of electric core; Increase content of active substance and can will certainly make the length phenomenal growth of pole piece, if adopt winding process in the production, the pole piece length of the battery battery core of part type even above 1.5 meters; Long pole piece brings unnecessary trouble can for the processing and manufacturing process, causes the rising of product fraction defective; And, adopt the internal resistance of the electric core of monomer of long pole piece also bigger, be unfavorable for the high power charging-discharging of battery, thereby to a certain degree limit the application of lithium ion battery.Technological deficiency based on the said goods exists is necessary the battery battery core technology of this type is further made improvement.
The utility model content
To the deficiency that exists in the background technology, the purpose of the utility model is to provide a kind of compound electric core and lithium ion battery, and it can guarantee to effectively reduce the internal resistance of battery under the prerequisite that battery capacity can not reduce.
In order to realize the purpose of the utility model; In one aspect; The utility model provides a kind of compound electric core; Comprise at least two monomers electricity core; Said each monomer electricity core is respectively arranged with positive pole ear and negative lug, and the positive pole ear of said monomer electricity core is that the welding manner of curve is welded as a whole that to form compound electric core anodal through the positive pole ear welding track, and the negative lug of said monomer electricity core is that the welding manner of curve is welded as a whole and forms compound electric core negative pole through the negative lug welding track.
In order to realize the purpose of the utility model; In yet another aspect; The utility model provides a kind of lithium ion battery, and the compound electric core that it comprises seal casinghousing and is positioned at seal casinghousing, wherein said compound electric core are the described compound electric core of the utility model first aspect.
Compared with prior art, the utlity model has following beneficial effect:
(1) because the compound electric core of the utility model has at least two monomer electricity cores, the lug of the identical polar between each monomer electricity core links to each other and forms compound electric core both positive and negative polarity respectively.The lug of identical polar links to each other and forms whole compound electric core; The compound electric core that externally promptly shows as a plurality of monomer electricity cores (more than or equal to two) parallel connection and form; Thereby guaranteeing to increase on the basis of battery capacity; Whole compound electric in-core resistance is reduced, and then reach reduction internal resistance increase battery capacity technique effect.
(2) the positive and negative lug of each monomer electricity core is when carrying out same sex lug welding in twos; In order further to reduce the contact internal resistance between the battery plus-negative plate ear, to the positive pole ear of monomer electricity core and the welding between the negative lug time, adopt curved welding track; Because welding track is a shaped form; The welding manner of relative traditional line shape, the phase of solder joint between the shaped form lug welding manner are to more, and it is big that the contact area between the same sex lug becomes; And then reduced the contact resistance between the same sex lug; Improve the electric conductivity of compound electric core, thereby reduced the internal resistance of using the lithium ion battery that this compound electric core is arranged to greatest extent, guaranteed the performance of lithium ion battery.
Description of drawings
Structural representation when Fig. 1 is two monomer electricity core positive pole ears connections;
Structural representation when Fig. 2 is two monomer electricity core negative lug connections;
The plan structure sketch map that welds between two monomer electricity core positive pole ears of Fig. 3 for Fig. 1;
The plan structure sketch map that welds between two monomer electricity core negative lug of Fig. 4 for Fig. 2;
Fig. 5 is another plan structure sketch map shown in Figure 3;
Fig. 6 is for using the perspective view of the lithium ion battery structure that compound electric core is arranged.
Wherein, description of reference numerals is following:
1 lithium ion battery, 11 compound electric cores are anodal
13 compound electric core negative pole 15 seal casinghousings
11A, 11B monomer electricity core positive pole ear 13A, 13B monomer electricity core negative lug
111 positive pole ear welding tracks, 131 negative lug welding tracks
Embodiment
The compound electric core and the lithium ion battery of the utility model are described below in conjunction with accompanying drawing.
Compound electric core according to the utility model at first is described.
Fig. 1 is two monomer electricity core positive pole ear 11A, the structural representation when 11B connects; Fig. 2 is two monomer electricity core negative lug 13A, the structural representation when 13B connects; The plan structure sketch map of Fig. 3 for welding between two monomers electricity core positive pole ear 11A of Fig. 1, the 11B; The plan structure sketch map of Fig. 4 for welding between two monomers electricity core negative lug 13A of Fig. 2, the 13B;
To structure shown in Figure 4, compound electric core comprises two monomers electricity core at Fig. 1.Each monomer electricity core is respectively arranged with positive pole ear and negative lug, and promptly in Fig. 1 and Fig. 2, a monomer electricity core is provided with positive pole ear 11A and negative lug 13A, and another monomer electricity core is provided with positive pole ear 11B and negative lug 13B.The positive pole ear 11A of said monomer electricity core, 11B form compound electric core through positive pole ear welding track 111 for the welding manner of curve is welded as a whole anodal 11, as shown in figures 1 and 3.The negative lug 13A of said monomer electricity core, 13B can form compound electric core negative pole 13 for the welding manner of curve is welded as a whole through negative lug welding track 131, like Fig. 2 and shown in Figure 4.
In the utility model, said each monomer electricity core can be the convoluted electric core that forms through pole piece coiling, or through the range upon range of laminated type electricity core that forms of pole piece.
Fig. 3 shows the shape of positive pole ear welding track 111, and it is a S shape.Fig. 5 shows another shape of positive pole ear welding track 111, and it is a W shape.Fig. 4 shows the shape of negative lug welding track 131, and it is a S shape, alternately, also can adopt shape shown in Figure 5, i.e. W shape.Certainly be not limited thereto, that positive pole ear welding track 111 and/or negative lug welding track 131 also can be is circular-arc, ellipticity, M deltoid.Certainly positive pole ear welding track 111 and/or negative lug welding track 131 or be the combination in any of circular-arc, ellipticity, S shape, W shape, M shape.
In Fig. 4 to Fig. 5, positive pole ear welding track 111 and/or negative lug welding track 131 are formed by bonding wire continuously.Alternately, positive pole ear welding track 111 and/or negative lug welding track 131 by discrete shape distribute apart from one another by pad form.
In the utility model, welding manner can adopt laser welding, resistance welded or ultrasonic bonding.The preferred laser welding that adopts.Compare with electric resistance welding, ultrasonic wave and other solder technology, laser welding has that speed of welding is fast, the degree of depth is big, distortion is little, almost do not have joint gap, tooling device is simple and operating environment is easy to advantages such as regulation and control.
In addition, positive pole ear 11A, 11B and negative lug 13A, the 13B of said each monomer electricity core can be that the welding manner difference correspondence of curve and the positive and negative electrode pole piece (not shown) of said each monomer electricity core link to each other through welding track also.The curve of welding track of this moment can adopt the curve identical with positive pole ear welding track 111, negative lug welding track 131.
In addition, compound electric wicking surface twines and is bonded with the heat resistant adhesive tape (not shown), fixes with each monomer electricity core that will overlap.Owing to each monomer electricity core by fixing around the heat resistant adhesive tape of the bonding winding of compound electric wicking surface; This measure makes the monomer electricity core of a plurality of parallel connections be combined into an integral body closely; Thereby avoided in the vibrations and the strong applied environment that jolts when using, because of rocking between the monomer electricity core, the inefficacy of the compound electric core that causes of misplacing.
Certainly, in the utility model, the quantity of the monomer electricity core that compound electric core comprises is not limited to two, can be for a plurality of.In other words, the quantity of the monomer electricity core that comprises of compound electric core is at least two.
Be example and the operating process that the utility model is described referring to figs. 1 through Fig. 4 with two monomers electricity cores below.
At first two monomer electricity cores are fixed the mode of positive pole ear 11B, negative lug 13A anticathode lug 13B according to positive pole ear 11A, outside then use heat resistant adhesive tape is fastened, to form constitutionally stable compound electric core;
Secondly the positive pole ear 11A that overlaps, 11B or negative lug 13A, 13B are compressed; Then welding condition is being set; Welding forms curved welding track 111 on the solder side between positive pole ear 11A, the 11B; Welding forms curved welding track 131 on the solder side between negative lug 13A, the 13B; Positive pole ear welding track 111 and/or negative lug welding track 131 can show as one section circular arc, one and be similar to the systematicness curve of S or W or M shape or the circular arc of a closure, also can show as one section irregular curve or discrete pad.
Below be the welding mechanism that example is explained the utility model with the laser welding.
With the position (focus of laser beam) between high-intensity bombardment with laser beams to position between the overlapping positive pole ear 11A that is pressed together, 11B or negative lug 13A, the 13B; Positive pole ear 11A, 11B or negative lug 13A, 13B absorb the energy of laser and it are converted into heat energy, this heat energy impel the focus of laser beam remove (be between positive pole ear 11A, the 11B or negative lug 13A, 13B between the bond pad locations place) metal melt; After removing laser beam, thereby molten metal forms smooth, compact welding track through crystallisation by cooling again.
The principal element of decision contact resistance and electronic conductivity is the size of positive pole ear and/or negative lug weld atom level contact area and the degree of oxidation of place, welding position metal.Under the situation of positive pole ear and/or negative lug area limited size, the utility model is improved to curved welding track with the linear pattern welding track of routine.Advantages such as the welding procedure after the improvement has that contact area is big, be heated evenly when firm welding, welding, the electron conduction ability is strong.
The welding method that the utility model disclosed also can be used for the connection between the laminated batteries paillon foil, perhaps is connected the perhaps connection between battery plus-negative plate and the afflux conductor between laminated batteries and the lug.
In the practical application, the number of the pole piece that should weld as required and the thickness of pole piece, material etc. are made suitable adjustment to the technological parameters such as power output of bonding machine.
The lithium ion battery of the utility model is described at last.
As shown in Figure 6, according to the compound electric core that the lithium ion battery 1 of the utility model comprises seal casinghousing 15 and is positioned at seal casinghousing 15, compound electric core comprises compound electric core anodal 11 recited above and compound electric core negative pole 13.
The utility model; Realization mechanism according to welding; Take curved welding procedure, overcome the problem that connection is unreliable and contact resistance is big in the conventional welding manner, reduced the internal resistance of lithium ionic cell unit; Improved the performance of many monomer electricity core batteries in parallel connection unit, had broad application prospects and the obvious improvement meaning.
Claims (7)
1. compound electric core; Comprise at least two monomers electricity core, said each monomer electricity core be respectively arranged with positive pole ear (11A, 11B) and negative lug (13A; 13B); It is characterized in that (11A 11B) forms compound electric core positive pole (11) through positive pole ear welding track (111) for the welding manner of curve is welded as a whole to the positive pole ear of said monomer electricity core; (13A 13B) is the welding manner of the curve formation compound electric core negative pole (13) that is welded as a whole through negative lug welding track (131) to the negative lug of said monomer electricity core.
2. compound electric core as claimed in claim 1 is characterized in that, said each monomer electricity core is the convoluted electric core that forms through pole piece coiling, perhaps through the range upon range of laminated type electricity core that forms of pole piece.
3. compound electric core as claimed in claim 1 is characterized in that, said positive pole ear welding track (111) and/or negative lug welding track (131) are one of circular-arc, ellipticity, S shape, W shape, M deltoid or their combination.
4. require 1 described compound electric core like claim, it is characterized in that, said positive pole ear welding track (111) and/or negative lug welding track (131) by discrete shape distribute apart from one another by pad form.
5. compound electric core as claimed in claim 1 is characterized in that, said compound electric wicking surface twines and surface adhesion has heat resistant adhesive tape.
6. compound electric core as claimed in claim 1 is characterized in that, the positive pole ear (111) of said each monomer electricity core is that the welding manner difference correspondence of curve and the positive and negative electrode pole piece of said each monomer electricity core link to each other with negative lug (131) through welding track.
7. a lithium ion battery comprises seal casinghousing (15) and the compound electric core that is positioned at seal casinghousing (15), it is characterized in that, said compound electric core is each described compound electric core in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200699972U CN202444029U (en) | 2012-02-29 | 2012-02-29 | Composite battery core and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200699972U CN202444029U (en) | 2012-02-29 | 2012-02-29 | Composite battery core and lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN202444029U true CN202444029U (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200699972U Expired - Fee Related CN202444029U (en) | 2012-02-29 | 2012-02-29 | Composite battery core and lithium ion battery |
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| Country | Link |
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| CN (1) | CN202444029U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104813540A (en) * | 2013-06-26 | 2015-07-29 | 古河电气工业株式会社 | Terminal, crimping terminal, wire harness and crimping terminal production method |
| CN110497082A (en) * | 2019-10-12 | 2019-11-26 | 崔少华 | A kind of cylindrical lithium ion battery cathode ear and battery case laser welding connect technique |
| CN110587127A (en) * | 2018-06-12 | 2019-12-20 | 大族激光科技产业集团股份有限公司 | Method for welding battery tab and bus bar |
| CN111069802A (en) * | 2018-10-19 | 2020-04-28 | 双叶产业株式会社 | Welding method |
| CN111618588A (en) * | 2020-06-01 | 2020-09-04 | 江西优特汽车技术有限公司 | Method for welding tab of soft-packaged battery cell |
-
2012
- 2012-02-29 CN CN2012200699972U patent/CN202444029U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104813540A (en) * | 2013-06-26 | 2015-07-29 | 古河电气工业株式会社 | Terminal, crimping terminal, wire harness and crimping terminal production method |
| CN104813540B (en) * | 2013-06-26 | 2018-01-09 | 古河电气工业株式会社 | Terminal, crimp type terminal, the manufacture method of wire harness and crimp type terminal |
| US9979099B2 (en) | 2013-06-26 | 2018-05-22 | Furukawa Electric Co., Ltd. | Terminal, crimp terminal, wire harness, and method for manufacturing crimp terminal |
| CN110587127A (en) * | 2018-06-12 | 2019-12-20 | 大族激光科技产业集团股份有限公司 | Method for welding battery tab and bus bar |
| CN111069802A (en) * | 2018-10-19 | 2020-04-28 | 双叶产业株式会社 | Welding method |
| US11628516B2 (en) | 2018-10-19 | 2023-04-18 | Futaba Industrial Co., Ltd. | Welding method |
| CN110497082A (en) * | 2019-10-12 | 2019-11-26 | 崔少华 | A kind of cylindrical lithium ion battery cathode ear and battery case laser welding connect technique |
| CN111618588A (en) * | 2020-06-01 | 2020-09-04 | 江西优特汽车技术有限公司 | Method for welding tab of soft-packaged battery cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20180229 |