CN202633424U - Cylindrical lithium ion battery and anode lug - Google Patents
Cylindrical lithium ion battery and anode lug Download PDFInfo
- Publication number
- CN202633424U CN202633424U CN2012201384043U CN201220138404U CN202633424U CN 202633424 U CN202633424 U CN 202633424U CN 2012201384043 U CN2012201384043 U CN 2012201384043U CN 201220138404 U CN201220138404 U CN 201220138404U CN 202633424 U CN202633424 U CN 202633424U
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- Prior art keywords
- lithium ion
- anode
- ion battery
- copper
- anode lug
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- Expired - Lifetime
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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
Abstract
The utility model belongs to the technical field of lithium ion batteries, and in particular relates to an anode lug for a cylindrical lithium ion battery, with small internal resistance and reliable welding. The anode lug comprises a copper strip, wherein a nickel strip is arranged on the surface of one end of the copper strip to form a copper-nickel composite strip. Compared with the prior art, the anode lug comprises a pure copper strip section and a copper-nickel composite strip section, wherein the copper strip has the advantages of good conductivity and small internal resistance, and the copper strip and a positive pole piece are well welded, and the copper-nickel composite strip can be well welded with a nickel plated battery shell. Thus, the anode lug is capable of reducing battery internal resistance and improving the stability of the welding. Moreover, the utility model also discloses a cylindrical lithium ion battery comprising the anode lug.
Description
Technical field
The utility model belongs to technical field of lithium ion, relates in particular to that a kind of internal resistance is little, the column lithium ion battery of reliable welding is used the anode lug, and the column lithium ion battery that comprises this anode lug.
Background technology
Along with development of modern society, the application of electric tools such as electric bicycle, battery-operated motor cycle and electric automobile more and more widely.Column lithium ion battery is as a kind of environmental protection battery, advantage such as have that energy density height, operating voltage are high, profile standard and shell are hard, and therefore the application in various electric tools is more and more widely.
Electric tool has higher requirement to the lithium ion battery as its energy supply element, for example, has both required the internal resistance of battery little, and the self-heating of battery requires electric core reliable welding again when reducing big multiplying power discharging, can stand the test of long-term vibration.But; Receive the influence of the structure particularity of column lithium ion battery; The anode lug of battery is very little with the welding operation space between the box hat, needs usually to adopt electric resistance welding, and we can say that the anode lug is a link the weakest in the electric core antidetonation with the welding between the box hat.Therefore the contradiction of the conductivity of anode lug and soldering reliability has become to hinder a bottleneck of column lithium ion battery development.
The anode lug of column lithium ion battery adopts Cu or Ni as material usually.Wherein, Cu possesses good electrical conductivity, helps reducing electric in-core resistance, and the Cu lug is with the good welding performance of anode base material Copper Foil simultaneously; But when the box hat of Cu and nickel plating welded, the welding parameter window narrows was prone to produce weldering, rosin joint, welding slag etc.; And Ni conductivity is poor slightly than Cu, can increase the internal resistance of cell to a certain extent, but has good welding performance between Ni and the nickel plating box hat.
In view of this, necessaryly provide that a kind of internal resistance is little, the column lithium ion battery of reliable welding is used the anode lug, and the column lithium ion battery that comprises this anode lug.
The utility model content
One of purpose of the utility model is: to the deficiency of prior art, a kind of internal resistance is little, the column lithium ion battery of reliable welding is used the anode lug and provide.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of column lithium ion battery is used the anode lug, comprises copper strips, and the surface of an end of said copper strips is provided with nickel strap, forms copper-nickel composite band.
Wherein, The electric conductivity of copper strips is fabulous, can effectively reduce the internal resistance of cell, and copper strips is easy to form good welding with the anode base material Copper Foil simultaneously; After this section lug inserts electric core; In winding process, under the effect of pole piece and barrier film tension force, be easy to bending, at utmost reduced its influence electric core circularity; Copper-nickel composite band is on the basis of copper strips, has increased one deck nickel strap, and during welding, nickel strap is over against the box hat that has nickel, and nickel strap can form good welding with the box hat that crosses nickel, has guaranteed the welding effect of lug and box hat resistance welded.Preferably resolve the conductivity of anode lug and the contradiction between the soldering reliability, improved the fail safe and the reliability of column lithium ion battery.
As a kind of improvement of the utility model column lithium ion battery with the anode lug, nickel strap is connected through welding or pressing with copper strips in said copper-nickel composite band, connects reliable copper-nickel composite band thereby form.
As a kind of improvement of the utility model column lithium ion battery with the anode lug, the thickness of said copper strips is 0.05～0.15mm.The thickness of copper strips is too little, and then unfavorable with welding to reducing internal resistance, the thickness of copper strips is too big, then can influence the circularity of electric core, and local pressure was excessive when electric core charging was expanded, and also can influence the energy density of battery simultaneously.
As a kind of improvement of the utility model column lithium ion battery with the anode lug, the thickness of said copper strips is 0.06～0.10mm.
As a kind of improvement of the utility model column lithium ion battery with the anode lug, the thickness of said nickel strap is 0.05～0.10mm.The thickness of nickel strap is too little, and then unfavorable to welding, the thickness of nickel strap is too big, then can influence the energy density of battery.
As a kind of improvement of the utility model column lithium ion battery with the anode lug, the thickness of said nickel strap is 0.06mm.
As a kind of improvement of the utility model column lithium ion battery with the anode lug, the length of said nickel strap is the 1/10-1/3 of said copper strips total length.
With respect to prior art; The anode lug of the utility model comprises fine copper band section and copper-nickel composite band section; Copper strips has good conductivity and little internal resistance, and copper strips and anode strip can form good welding, and copper-nickel composite band then can form good welding with the battery container of nickel plating.Therefore, the internal resistance of cell can be reduced, welding reliability can be improved again.
Another purpose of the utility model is to provide a kind of column lithium ion battery; Comprise battery container, be contained in the interior electric core of said battery container, be filled in the electrolyte in the said battery container; And seal group is connected to the battery cap on the said battery container; The central authorities of said electric core are provided with central space, are provided with central tube in the said central space, said electric core by cathode sheets, anode strip and be interval in cathode sheets and anode strip between membrane coil around forming; Said cathode sheets is provided with cathode tab; Said anode strip is provided with the anode lug, and said anode lug is welded on the bottom of battery container, and said anode lug is that the described column lithium ion battery of above-mentioned paragraph is used the anode lug.
As a kind of improvement of the utility model column lithium ion battery, the base material of said anode strip is a Copper Foil.
As a kind of improvement of the utility model column lithium ion battery, said copper-nickel composite band and battery container are welded to connect, and said copper strips and said anode strip are welded to connect.
With respect to prior art, the utility model has been owing to adopted the anode lug with little internal resistance, high welding reliability, so entire cell also has less relatively resistance, and under the situation of big multiplying power discharging, the self-heating of battery is little, guarantees the safety of battery; Entire cell has high soldering reliability again simultaneously, can stand the test of long-term vibration, guarantees the normal use of battery in electric tool.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, the utility model and useful technique effect thereof are carried out detailed explanation, wherein:
Fig. 1 is the structural representation of the utility model column lithium ion battery with the anode lug;
Fig. 2 is the profile of the utility model column lithium ion battery.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model is described in further detail, but the execution mode of the utility model is not limited thereto.
As shown in Figure 1, a kind of column lithium ion battery of the utility model is used the anode lug, comprises copper strips 6, and the surface of an end of said copper strips is provided with nickel strap 71, forms copper-nickel composite band 7.
Wherein, The electric conductivity of copper strips 6 is fabulous, can effectively reduce the internal resistance of cell, and copper strips 6 is easy to form good welding with the anode base material Copper Foil simultaneously; After this section lug inserts electric core; In winding process, under the effect of pole piece and barrier film tension force, be easy to bending, at utmost reduced its influence electric core circularity; Copper-nickel composite band is on the basis of copper strips 6, has increased one deck nickel strap 71, and during welding, nickel strap 71 is over against the box hat that has nickel, and nickel strap 71 can form good welding with the box hat that crosses nickel, has guaranteed the welding effect of lug and box hat resistance welded.Preferably resolve the conductivity of anode lug and the contradiction between the soldering reliability, improved the fail safe and the reliability of column lithium ion battery.
Wherein, nickel strap 71 is connected through welding or pressing with copper strips 6 in said copper-nickel composite band 7, connects reliable copper-nickel composite band 7 thereby form.
The thickness of said copper strips 6 is 0.05～0.15mm, is preferably 0.06～0.10mm.
The thickness of said nickel strap 71 is 0.05～0.10mm, is preferably 0.06mm.
The length of said nickel strap 71 is the 1/10-1/3 of said copper strips 6 total lengths.
With respect to prior art; The anode lug of the utility model comprises 7 sections of 6 sections on fine copper band and copper-nickel composite band; Copper strips 6 has good conductivity and little internal resistance, and copper strips 6 can form good welding with anode strip, and copper-7 abilities of nickel composite band form good welding with the battery container of nickel plating.Therefore, the internal resistance of cell can be reduced, welding reliability can be improved again.
During actual production; Earlier be covered with one deck nickel foil in an end of the Copper Foil mode through pressing or welding; According to the length and the width demand of anode lug, adopt the pattern of transverse cuts that it is cut then, the column lithium ion battery that obtains the utility model is used the anode lug.
As shown in Figure 2; A kind of column lithium ion battery of the utility model; Comprise battery container 1, be contained in electric core 8 in the said battery container 1, be filled in the electrolyte in the said battery container 1, and seal group is connected to the battery cap 9 on the said battery container 1, the central authorities of said electric core 8 are provided with central space; Be provided with central tube 5 in the said central space; Said electric core 8 by cathode sheets 4, anode strip 2 and be interval in cathode sheets 4 and anode strip 2 between barrier film 3 reel and form, said cathode sheets 4 is provided with cathode tab 41, said anode strip 2 is provided with anode lug 21; Said anode lug 21 is welded on the bottom of battery container 1, and said anode lug 21 is that the described column lithium ion battery of above-mentioned paragraph is used the anode lug.
Wherein, the base material of said anode strip 2 is a Copper Foil.
Said copper-nickel composite band 7 is welded to connect with battery container 1, and said copper strips 6 is welded to connect with the Copper Foil of said anode strip 2.
During assembling; Elder generation's welded cathode lug on cathode sheets 4; The anode lug 21 that on anode strip 2, welds the utility model then is (during welding; Fine copper band section and anode strip 2 are welded to connect), the cathode sheets 4 that will be welded with anode strip 2, the barrier film 3 of lug then and be welded with lug is prepared electric core 8 through coiling, and its septation 3 guarantees the obstruct fully between anode strip 2 and the cathode sheets 4 all the time.To be inserted into by the electric core 8 that anode strip 2, barrier film 3 and cathode sheets 4 are formed in the battery container 1,, adopt the resistance welded pattern, the copper-nickel composite band 7 of anode lug 21 and the bottom of battery container 1 will be welded to connect through the central tube 5 of electric core.Cathode tab 41 is welded to connect with block 9, will block a shot then 9 to be welded on the battery container 1.
With respect to prior art, the utility model has been owing to adopted the anode lug with little internal resistance, high welding reliability, so entire cell also has less relatively resistance, and under the situation of big multiplying power discharging, the self-heating of battery is little, guarantees the safety of battery; Entire cell has high soldering reliability again simultaneously, can stand the test of long-term vibration, guarantees the normal use of battery in electric tool.
Need to prove that according to the announcement and the elaboration of above-mentioned specification, the utility model those skilled in the art can also change and revise above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should be in the protection range of the claim of the utility model to some equivalent modifications of the utility model and change.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the utility model is not constituted any restriction.
Claims (10)
1. a column lithium ion battery is used the anode lug, comprises copper strips, it is characterized in that: the surface of an end of said copper strips is provided with nickel strap, forms copper-nickel composite band.
2. column lithium ion battery according to claim 1 is used the anode lug, it is characterized in that: nickel strap is connected through welding or pressing with copper strips in said copper-nickel composite band.
3. column lithium ion battery according to claim 1 is used the anode lug, it is characterized in that: the thickness of said copper strips is 0.05～0.15mm.
4. column lithium ion battery according to claim 3 is used the anode lug, it is characterized in that: the thickness of said copper strips is 0.06～0.10mm.
5. column lithium ion battery according to claim 1 is used the anode lug, it is characterized in that: the thickness of said nickel strap is 0.05～0.10mm.
6. column lithium ion battery according to claim 5 is used the anode lug, it is characterized in that: the thickness of said nickel strap is 0.06mm.
7. column lithium ion battery according to claim 1 is used the anode lug, it is characterized in that: the length of said nickel strap is the 1/10-1/3 of said copper strips total length.
8. column lithium ion battery; Comprise battery container, be contained in the interior electric core of said battery container, be filled in the electrolyte in the said battery container; And seal group is connected to the battery cap on the said battery container; The central authorities of said electric core are provided with central space, are provided with central tube in the said central space, said electric core by cathode sheets, anode strip and be interval in cathode sheets and anode strip between membrane coil around forming; Said cathode sheets is provided with cathode tab; Said anode strip is provided with the anode lug, and said anode lug is welded on the bottom of battery container, it is characterized in that: said anode lug is that any described column lithium ion battery of claim 1 to 7 is used the anode lug.
9. column lithium ion battery according to claim 8 is characterized in that: the base material of said anode strip is a Copper Foil.
10. column lithium ion battery according to claim 9 is characterized in that: said copper-nickel composite band and battery container are welded to connect, and said copper strips and said anode strip are welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201384043U CN202633424U (en) | 2012-04-05 | 2012-04-05 | Cylindrical lithium ion battery and anode lug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201384043U CN202633424U (en) | 2012-04-05 | 2012-04-05 | Cylindrical lithium ion battery and anode lug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202633424U true CN202633424U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201384043U Expired - Lifetime CN202633424U (en) | 2012-04-05 | 2012-04-05 | Cylindrical lithium ion battery and anode lug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202633424U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406019A (en) * | 2015-12-05 | 2016-03-16 | 江苏天鹏电源有限公司 | Multi-layer structure-based negative tab of lithium-ion battery |
| CN105514333A (en) * | 2015-12-05 | 2016-04-20 | 江苏天鹏电源有限公司 | Lithium ion battery negative pole tab with composite structure |
| CN105870392A (en) * | 2016-05-13 | 2016-08-17 | 深圳市科陆电子科技股份有限公司 | Electrode, battery cell, battery module, as well as preparation method and application of battery module |
| CN107022778A (en) * | 2017-03-12 | 2017-08-08 | 山东金盛源电子材料有限公司 | The lug that the method and application this method of a kind of four sides nickel plating electrolytic copper foil are produced |
| CN108172748A (en) * | 2017-12-30 | 2018-06-15 | 惠州亿纬锂能股份有限公司 | Lug and manufacturing method, the lithium battery and manufacturing method with the lug |
-
2012
- 2012-04-05 CN CN2012201384043U patent/CN202633424U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406019A (en) * | 2015-12-05 | 2016-03-16 | 江苏天鹏电源有限公司 | Multi-layer structure-based negative tab of lithium-ion battery |
| CN105514333A (en) * | 2015-12-05 | 2016-04-20 | 江苏天鹏电源有限公司 | Lithium ion battery negative pole tab with composite structure |
| CN105870392A (en) * | 2016-05-13 | 2016-08-17 | 深圳市科陆电子科技股份有限公司 | Electrode, battery cell, battery module, as well as preparation method and application of battery module |
| CN107022778A (en) * | 2017-03-12 | 2017-08-08 | 山东金盛源电子材料有限公司 | The lug that the method and application this method of a kind of four sides nickel plating electrolytic copper foil are produced |
| CN107022778B (en) * | 2017-03-12 | 2019-04-12 | 山东金盛源电子材料有限公司 | A kind of method of four sides nickel plating electrolytic copper foil and the tab of application this method production |
| CN108172748A (en) * | 2017-12-30 | 2018-06-15 | 惠州亿纬锂能股份有限公司 | Lug and manufacturing method, the lithium battery and manufacturing method with the lug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |