CN211719697U - Negative electrode conductive handle and soft package lithium battery - Google Patents
Negative electrode conductive handle and soft package lithium battery Download PDFInfo
- Publication number
- CN211719697U CN211719697U CN202020548903.4U CN202020548903U CN211719697U CN 211719697 U CN211719697 U CN 211719697U CN 202020548903 U CN202020548903 U CN 202020548903U CN 211719697 U CN211719697 U CN 211719697U
- Authority
- CN
- China
- Prior art keywords
- conductive
- handle
- copper
- welding
- layer
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- 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
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a negative pole electrically conducts handle and soft packet of lithium cell, negative pole electrically conducts handle include copper baseband and electrically conductive tectorial membrane layer, and the copper baseband includes electrically conductive section and the welding section that links to each other with electrically conductive section, and the welding section is used for welding with the negative pole copper sheet of soft packet of lithium cell stack body, and electrically conductive tectorial membrane layer covers and locates each of electrically conductive section on the surface. The utility model provides a negative pole electrically conducts handle through the main part that adopts the copper baseband as the electrically conductive handle of negative pole, has changed the material of the electrically conductive handle of negative pole, when the copper baseband of the electrically conductive handle of negative pole and the negative pole copper sheet of soft packet of lithium cell stack body carried out ultrasonic bonding, realized that the copper baseband carries out the welding of the same kind of material with the copper sheet, avoids the welding of xenogenesis material to produce welding defect, has improved the welding quality and the welding goodness of the electrically conductive handle of negative pole and soft packet of lithium cell stack body. And a layer of conductive coating film layer is coated on one side surface or two side surfaces of the conductive section of the copper base band, so that the conductive section of the copper base band can be effectively prevented from being oxidized and rusted.
Description
Technical Field
The utility model belongs to the technical field of laminate polymer battery, more specifically say, relate to a negative pole electrically conducts handle and laminate polymer lithium cell.
Background
The nickel metal has good conductivity, soft texture, high surface hardness and strong oxidation resistance. Therefore, in the soft package lithium battery industry, a nickel sheet with a thickness of about 0.2mm is generally adopted as a negative electrode conductive handle (tab) of the soft package lithium battery. At present, copper sheet (like copper foil etc.) is generally adopted to the negative pole of laminate formula soft packet of lithium cell's stack, when carrying out ultrasonic bonding to the negative pole of soft packet of lithium cell's stack and the electrically conductive handle (utmost point ear) of negative pole, has copper foil and nickel piece to carry out the welding of xenogenesis material, very easily leads to welding defect like this, and the stack that causes soft packet of lithium cell is lower with the welding goodness of the electrically conductive handle (utmost point ear) of negative pole. And, soft packet of lithium cell just, the electrically conductive handle of negative pole leads to the anodal electrically conductive handle of soft packet of lithium cell to be different with the thickness of the electrically conductive handle of negative pole because of the material difference, causes the regional thickness inconsistency of soft packet of lithium cell top seal.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a handle is electrically conducted to negative pole to solve the soft packet of lithium cell stack's that exists among the prior art negative pole copper sheet and the electrically conductive handle of negative pole, there is the copper sheet to carry out the welding of xenogenesis material with the nickel piece, lead to welding defect easily, cause the lower technical problem of welding goodness.
In order to achieve the above object, the utility model adopts the following technical scheme: providing a negative electrode conductive handle, which comprises a copper base band and a conductive film coating layer;
the copper baseband comprises:
a conductive segment; and
the welding section is connected with the conductive section and is used for welding with a negative copper sheet of the soft package lithium battery laminated body;
the conductive coating layer is coated on one side surface or two side surfaces of the conductive section.
By adopting the technical scheme, the copper base band is used as the main body of the negative electrode conductive handle, the conductive material of the negative electrode conductive handle is replaced, the welding section of the copper base band and the negative electrode copper sheet of the soft package lithium battery stack body are subjected to ultrasonic welding, the copper base band and the copper sheet are welded by the same material, the welding defect generated when dissimilar materials are welded is avoided, and the welding quality and the welding goodness are improved. And a layer of conductive coating film layer is coated on one side surface or two side surfaces of the conductive section of the copper base band, so that the conductive section of the copper base band can be effectively prevented from being oxidized and rusted, the conductive performance of the conductive section of the copper base band is enhanced, and the service life of the negative conductive handle is prolonged. Meanwhile, the conductive film coating layers on the surfaces of the conductive sections are covered, so that the thickness of the negative conductive handle is the same as that of the positive conductive handle of the soft package lithium battery, the consistency of the thickness of the top sealing area of the soft package lithium battery is ensured, and the cycle service life of the battery is prolonged.
In one embodiment, the copper base tape has a thickness in a range of 0.15mm to 0.35 mm.
By adopting the technical scheme, the thickness of the copper base band is set to be 0.15mm to 0.35mm, so that the conductive section of the copper base band has better overcurrent capacity, and the conductivity of the conductive section of the copper base band is enhanced. Meanwhile, the welding section of the copper base band can be ensured to have good welding strength, and the stability and reliability of the connection of the negative electrode conductive handle and the negative electrode of the soft package lithium battery laminated body are enhanced.
In one embodiment, the conductive overlaminate layer is an aluminum layer.
By adopting the technical scheme, the aluminum layers are coated on the surfaces of the conductive sections of the copper base band, and the surfaces of the aluminum layers are used for forming compact oxides, so that the oxidation resistance and the corrosion resistance of the conductive sections of the copper base band are realized, the service life of the negative conductive handle is prolonged, and the safety performance of the soft package lithium battery is further enhanced. When needs make the soft packet of lithium cell more than two establish ties and use, can change the busbar of battery module into aluminium spare by the copper spare of nickel plating, the aluminium base band that makes the anodal electrically conductive handle of a soft packet of lithium cell and the aluminium lamination of the electrically conductive handle of the negative pole of another soft packet of lithium cell realize the laser welding of the same kind of material with aluminium system busbar respectively, welding defect who exists when avoiding the xenogenesis material welding with lead to lower welding goodness, and then improve the whole working property of the soft packet of lithium cell of establishing ties.
In one embodiment, the aluminum layer has a thickness in a range of 0.05mm to 0.1 mm.
By adopting the technical scheme, the thickness of the aluminum layer is set to be 0.05mm to 0.1mm, so that the aluminum layer has good corrosion resistance, the heat effect generated in the conductive process can be reduced, and the improvement of the overall conductive rate performance of the negative conductive handle is facilitated.
In one embodiment, the conductive film coating layer is an aluminum layer disposed on a single side surface of the conductive segment.
Through adopting above-mentioned technical scheme, the unilateral surface at the conducting segment of copper baseband is covered and is established the aluminium lamination, when needs make the soft packet of lithium cell more than two and establish ties the use, can change the busbar of battery module into the aluminium part by the copper spare of nickel plating, the aluminium lamination of the aluminium baseband of the anodal electrically conductive handle of a soft packet of lithium cell and the electrically conductive handle of negative pole of another soft packet of lithium cell, realize the laser welding of the same kind of material with aluminium system busbar respectively, the welding defect who exists when avoiding the xenogenesis material welding with lead to lower welding goodness, and then improve the whole working property of the soft packet of lithium cell of establishing ties.
In one embodiment, the conductive film coating layer is an aluminum layer coated on both side surfaces of the conductive segment.
Through adopting above-mentioned technical scheme, establish the aluminium lamination on the two side surfaces of the conducting segment of copper baseband, when needs make the soft packet of lithium cell more than two establish ties and use, the ultrasonic bonding of the aluminium system busbar of the negative pole conductive handle of the soft packet of lithium cell of being convenient for and battery module improves battery machining efficiency to be favorable to strengthening the corrosion resistance of the conducting segment of copper baseband.
In one embodiment, the conductive coating layer is a nickel layer disposed on a single side surface of the conductive segment.
Through adopting above-mentioned technical scheme, establish the nickel layer on the unilateral surface of the conducting segment of copper baseband, when needs make the soft packet of lithium cell more than two establish ties and use, can make the busbar ultrasonic bonding of the nickel plating of the negative pole conductive handle of soft packet of lithium cell and battery module, improve battery machining efficiency. Meanwhile, the nickel layer has better corrosion resistance and plays roles of oxidation resistance and corrosion resistance on the conductive section of the copper base band.
In one embodiment, the conductive coating layer is a nickel layer coated on both side surfaces of the conductive segment.
By adopting the technical scheme, the nickel layers are coated on the surfaces of the two sides of the conductive section of the copper base band, so that the hardness of the conductive section of the copper base band is enhanced, the negative conductive handle of the soft package lithium battery is conveniently welded with the nickel-plated busbar ultrasonic wave of the battery module, and the effects of oxidation resistance and corrosion resistance on the conductive section of the copper base band can be further enhanced.
In one embodiment, the conductive coating layer is an aluminum layer disposed on one side surface of the conductive segment and a nickel layer disposed on the other side surface of the conductive segment.
By adopting the technical scheme, the aluminum layer is coated on one side surface of the conductive section of the copper base band, and the nickel layer is coated on the other side surface of the conductive section of the copper base band, so that the nickel layer and the aluminum layer have better corrosion resistance, and the anti-oxidation and anti-corrosion effects are achieved on the conductive section of the copper base band. And when more than two soft package lithium batteries are required to be connected in series for use, the negative electrode conductive handle and the aluminum busbar can be conveniently welded by the same material, and the welding goodness of ultrasonic waves is improved. In addition, the nickel layer has higher hardness relative to the aluminum layer, so that the hardness of the part of the negative conductive handle covered with the conductive coating layer can be enhanced, and after the aluminum layer of the negative conductive handle of the soft package lithium battery and the aluminum bus bar are subjected to laser welding of the same material, the welding part of the negative conductive handle covered with the conductive coating layer and the aluminum bus bar has stronger strength.
In one embodiment, the end face of the end of the conductive segment far away from the welding segment is further covered with a covering layer.
Through adopting above-mentioned technical scheme, through keeping away from at the conducting segment the terminal surface of the one end of welding section coats and is equipped with the overburden, can utilize the overburden to play the guard action to the tip of the conducting segment of copper baseband to at the in-process of battery processing, avoid the tip of the conducting segment of copper baseband to produce the phenomenon of scraping flower or even scratch to other components of soft packet of lithium cell, influence the stability of soft packet of lithium cell working property.
In one embodiment, the cover layer is an aluminum layer or a nickel layer.
Through adopting above-mentioned technical scheme, keeping away from in the conducting segment the terminal surface of the one end of welding section coats and is equipped with one deck aluminium lamination or nickel coating, keeps away from as conducting segment through aluminium lamination or nickel coating the overburden on the terminal surface of the one end of welding section both can play the guard action to the tip of the conducting segment of copper baseband, can prevent keeping away from again the conducting segment the tip of the one end of welding section is oxidized, is corroded, guarantees the stability of the conducting segment working property of copper baseband.
In one embodiment, the length of the conductive segment is greater than the length of the solder segment.
By adopting the technical scheme, the length of the conductive section of the copper base band is set to be larger than that of the welding section of the copper base band, so that the surface area of the conductive section for heat dissipation can be increased, heat generated by overcurrent in the negative electrode conductive handle can be timely and quickly dissipated, and the negative electrode conductive handle is prevented from being burnt out and damaged due to larger heat under the power-on condition, and danger is caused.
The second purpose of the embodiment of the utility model is to provide a soft packet of lithium cell to the negative pole copper sheet and the electrically conductive handle of negative pole of the soft packet of lithium cell stack body that exists among the solution prior art exist the welding that copper sheet and nickel piece carried out the xenogenesis material when the welding, lead to welding defect easily, cause the lower technical problem of welding goodness.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a soft packet of lithium cell, including anodal electrically conductive handle, the electrically conductive handle of negative pole and respectively with the conducting handle of positive pole and the electrically conductive stack body that the handle is connected of negative pole, the electrically conductive handle of negative pole do the electrically conductive handle of negative pole, the welding section with the negative pole copper sheet welding of stack body.
Through adopting above-mentioned technical scheme, adopt the copper baseband as the main part of the electrically conductive handle of negative pole, owing to changed the material of the electrically conductive handle of negative pole to carry out ultrasonic bonding through the welding section of copper baseband and the negative pole copper sheet of soft packet of lithium cell stack, realize that copper baseband and copper sheet carry out the welding of the same kind of material, improved welding quality and welding goodness, guarantee soft packet of lithium cell working property's stability, increase the circulation life of battery.
In one embodiment, the thickness of the portion of the negative electrode conductive handle coated with the conductive coating layer is the same as the thickness of the positive electrode conductive handle.
Through adopting above-mentioned technical scheme, adopt the copper baseband as the main part of the electrically conductive handle of negative pole, owing to changed the material of the electrically conductive handle of negative pole, and carry out ultrasonic bonding through the welding section of copper baseband and the negative pole copper sheet of soft packet of lithium cell stack, each surface at the electrically conductive section of copper baseband coats and establishes the electrically conductive tectorial membrane layer of one deck, the part that makes the electrically conductive handle of negative pole cover and be equipped with electrically conductive tectorial membrane layer is the same with the thickness of the anodal electrically conductive handle of soft packet of lithium cell, guarantee the uniformity of the regional thickness of soft packet of lithium cell top seal, increase the cycle life of battery.
The embodiment of the utility model provides an in above-mentioned one or more technical scheme, compare with prior art, have one of following technological effect at least:
the utility model discloses electrically conductive handle of negative pole and soft packet of lithium cell, the electrically conductive handle of negative pole is through adopting the copper baseband as the electrically conductive main part of handle of negative pole, owing to changed the electrically conductive material of the electrically conductive handle of negative pole to when the electrically conductive handle of negative pole carries out ultrasonic bonding with the negative pole of soft packet of lithium cell stack body, realized that the copper baseband carries out the welding of the same kind of material with the copper sheet, avoid the welding of xenogenesis material to produce welding defect, improved the welding quality and the welding goodness of the electrically conductive handle of negative pole and soft packet of lithium cell stack body. And a layer of conductive coating film layer is coated on one side surface or two side surfaces of the conductive section of the copper base band, so that the conductive section of the copper base band can be effectively prevented from being oxidized and rusted, the conductive performance of the conductive section of the copper base band is enhanced, and the service life of the negative conductive handle is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural view of a negative electrode conductive handle provided in an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structural view of a negative conductive handle according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structural view of the negative electrode conductive handle provided by the second embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-copper base band; 11-a conductive segment; 12-a welding section;
2-conductive film coating layer; 3, gluing a tab; 4-covering layer.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1 and fig. 2, a negative conductive handle according to an embodiment of the present invention will be described. The embodiment of the utility model provides a negative pole electrically conducts handle can be applied to soft packet of lithium cell, this negative pole electrically conducts handle and soft packet of lithium cell stack's negative pole welding to with the anodal electrically conductive handle cooperation of soft packet of lithium cell, make soft packet of lithium cell normal power supply work. Referring to fig. 1, the negative electrode conductive handle includes a copper base tape 1 and a conductive coating film layer 2 for corrosion prevention. With further reference to fig. 2, the copper base strip 1 comprises electrically conductive segments 11 and welding segments 12 connected to the electrically conductive segments 11. The welding section 12 is used for welding with a negative copper sheet of the soft package lithium battery laminated body. Specifically, the conductive segment 11 and the soldering segment 12 in this embodiment may be an integrally formed copper foil, forming the copper base tape 1 with good conductivity. Referring to fig. 2, the conductive coating layer 2 is coated on one side surface or both side surfaces of the conductive segment 11, so that only the welding segment 12 of the negative conductive handle is exposed to the outside, and the conductive segment 11 of the copper base tape 1 can be effectively prevented from being oxidized and corroded under the condition that the negative conductive handle has good overcurrent capability.
The embodiment of the utility model provides a negative pole electrically conducts handle compares with prior art, through the main part that adopts copper baseband 1 as the electrically conductive handle of negative pole, owing to changed the material of the electrically conductive handle of negative pole, when the copper baseband 1 of the electrically conductive handle of negative pole carries out ultrasonic bonding with soft packet of lithium cell stack's negative pole copper sheet, realized that copper baseband 1 and copper sheet carry out the welding of the same kind of material, avoid the welding of xenogenesis material to produce welding defect, improved the welding quality and the welding goodness of the electrically conductive handle of negative pole and soft packet of lithium cell stack. And, set up a layer of electrically conductive tectorial membrane layer 2 on one side surface or both sides surface of the electrically conductive section 11 of copper baseband 1, can prevent the electrically conductive section 11 of the copper baseband 1 effectively by the oxidation corrosion, strengthened the electrically conductive performance of the electrically conductive section 11 of the copper baseband 1 and prolonged the life of the electrically conductive handle of negative pole. Meanwhile, the surface of one side or the surfaces of two sides of the conductive section 11 of the copper base band 1 are covered with the conductive film coating layer 2, so that the thickness of the negative conductive handle is the same as that of the positive conductive handle of the soft package lithium battery, the consistency of the thickness of the top sealing area of the soft package lithium battery is ensured, and the cycle service life of the battery is prolonged.
The utility model discloses an embodiment, the thickness scope of copper baseband 1 is 0.15mm to 0.35mm, makes the conducting segment 11 of copper baseband 1 have better overcurrent capacity, strengthens the electric conductive property of the conducting segment 11 of copper baseband 1. Meanwhile, the welding section 12 of the copper base band 1 can be ensured to have good welding strength, and the stability and reliability of the connection of the negative electrode conductive handle and the negative electrode of the soft package lithium battery laminated body are enhanced.
In an embodiment of the present invention, please refer to fig. 2, the length of the conductive segment 11 of the copper baseband 1 is set to be greater than the length of the welding segment 12, so as to increase the heat dissipation area of the conductive segment 11, so that the heat generated by the overcurrent in the negative conductive handle can be dissipated quickly in time, thereby avoiding the danger caused by the large heat dissipation of the negative conductive handle under the power-on condition.
In another embodiment of the present invention, the conductive film layer 2 is an aluminum layer coated on one surface of the conductive segment 11. In the embodiment, by adopting the technical scheme, the aluminum layers are electroplated on the surfaces of the conductive section 11 of the copper base band 1, and the conductive section 11 of the copper base band 1 is subjected to oxidation resistance and corrosion resistance by using the compact oxides formed on the surfaces of the aluminum layers, so that the service life of the negative electrode conductive handle is prolonged, and the safety performance of the soft package lithium battery is further enhanced. And, when needs make the soft packet of lithium cell more than two establish ties and use, satisfying under the circumstances of overcurrent capacity, can change the busbar of connecting two adjacent soft packet of lithium cells into aluminium spare by the copper spare of nickel plating, make the aluminium baseband of the anodal electrically conductive handle of a soft packet of lithium cell and the aluminium lamination of the electrically conductive handle of negative pole of another soft packet of lithium cell, realize the laser welding of the same kind of material with aluminium system busbar respectively, welding defect who exists when avoiding the xenogenesis material welding with lead to lower welding goodness, and then improve the whole working property of the soft packet of lithium cell of establishing ties.
In another embodiment of the present invention, referring to fig. 2, the conductive film layer 2 is an aluminum layer coated on both surfaces of the conductive segment 11. In this embodiment, by adopting the above technical solution, the aluminum layers are coated on the surfaces of both sides of the conductive segment 11 of the copper baseband 1, and the difference between the aluminum layers coated on the surface of one side of the conductive segment 11 of the copper baseband 1 is as follows: when needs make the soft packet of lithium cell series connection more than two use, the ultrasonic bonding of the aluminium system busbar of the electrically conductive handle of the negative pole of the soft packet of lithium cell of being convenient for and battery module improves battery machining efficiency to be favorable to strengthening the corrosion resisting property of the conductive section 11 of copper baseband 1.
In another embodiment of the present invention, the thickness range of the aluminum layer is set to 0.05mm to 0.1mm in combination with the thickness of the copper base tape 1. It is to be understood that, for example: when the thickness of the copper base band 1 is 0.15mm to 0.2mm, the thickness range of the aluminum layer is set to be 0.09mm to 0.1 mm; when the thickness of the copper base tape 1 is 0.2mm to 0.25mm, the thickness range of the aluminum layer is set to be 0.06mm to 0.09 mm; when the thickness of the copper base tape 1 is 0.25 to 0.35mmmm, the thickness of the aluminum layer is set to a range of 0.05mm to 0.06 mm. Like this, alright combine the thickness of copper baseband 1 to correspond the thickness that sets up the aluminium lamination, when guaranteeing that the aluminium lamination has good corrosion protection ability, the thermal effect that the reducible electrically conductive in-process produced is favorable to improving the whole electrically conductive multiplying power performance of negative pole electrically conductive handle. And, under the condition of ensuring that the copper baseband 1 has enough overcurrent capacity, the thickness of the aluminum layer is set according to the thickness of the copper baseband 1, and the thickness range of the aluminum layer is set to be 0.05mm to 0.1 mm. It is to be understood that, for example: when the thickness of the copper base band 1 is 0.15mm to 0.2mm, the thickness range of the aluminum layer is set to be 0.09mm to 0.1 mm; when the thickness of the copper base tape 1 is 0.2mm to 0.25mm, the thickness range of the aluminum layer is set to be 0.06mm to 0.09 mm; when the thickness of the copper base tape 1 is 0.25 to 0.35mmmm, the thickness of the aluminum layer is set to a range of 0.05mm to 0.06 mm. Like this, alright combine the thickness correspondence of copper baseband 1 to set up the thickness of aluminium lamination, make the thickness that covers the part that is equipped with electrically conductive tectorial membrane layer 21 of negative pole electrically conductive handle the same with the thickness of the anodal electrically conductive handle of lithium-ion battery of soft package, guarantee the regional uniformity of thickness of soft package lithium battery top seal, increase the cycle life of battery.
In another embodiment of the present invention, the conductive film layer 2 is a nickel layer coated on one side surface of the conductive segment 11. In this embodiment, by adopting the above technical solution, a nickel layer is coated on a single-side surface of the conductive segment 11 of the copper base tape 1, and a difference between the nickel layer and the aluminum layer coated on the single-side surface of the conductive segment 11 of the copper base tape 1 is that: when the soft packet of lithium cell more than two series connection uses of needs, can make the bus bar ultrasonic bonding of the nickel plating of the electrically conductive handle of negative pole and battery module of soft packet of lithium cell, improve battery machining efficiency. Meanwhile, the nickel layer has better corrosion resistance, plays roles of oxidation resistance and corrosion resistance on the conductive section 11 of the copper base band 1, is beneficial to prolonging the service life of the negative conductive handle, and further enhances the safety performance of the soft package lithium battery.
In another embodiment of the present invention, referring to fig. 2, the conductive film layer 2 is a nickel layer coated on the surfaces of both sides of the conductive segment 11. In this embodiment, by adopting the above technical solution, the nickel layer is coated on the surfaces of both sides of the conductive segment 11 of the copper base band 1, and the difference between the nickel layer coated on the surface of one side of the conductive segment 11 of the copper base band 1 is that: the hardness of the conductive section 11 of the copper base band 1 is enhanced, the negative conductive handle of the soft package lithium battery is conveniently welded with the bus bar of the nickel plating of the battery module, the effects of oxidation resistance and corrosion resistance are further enhanced on the conductive section 11 of the copper base band 1, the service life of the negative conductive handle is prolonged, and the safety performance of the soft package lithium battery is further enhanced.
In another embodiment of the present invention, referring to fig. 2, the conductive film layer 2 is an aluminum layer disposed on one side surface of the conductive segment 11 and a nickel layer disposed on the other side surface of the conductive segment 11. In this embodiment, by adopting the above technical solution, an aluminum layer is plated on the one-side surface of the conductive segment 11 of the copper base band 1, and a nickel layer is plated on the other-side surface of the copper base band 1, which is different from the aluminum layer or the nickel layer coated on the one-side surface of the conductive segment 11, in that the nickel layer has higher hardness relative to the aluminum layer, and the hardness of the portion of the negative conductive handle coated with the conductive coating layer 2 can be enhanced, and after the laser welding of the aluminum layer of the negative conductive handle of the soft package lithium battery and the aluminum busbar of the same material is realized, the portion of the negative conductive handle coated with the conductive coating layer 2 and the welding position of the aluminum busbar have stronger strength.
In another embodiment of the present invention, the conductive coating layer 2 includes an aluminum layer plated on at least one surface of the conductive segment 11 and a chromium layer plated on at least another surface of the conductive segment 11.
In this embodiment, by adopting the above technical solution, an aluminum layer is plated on at least one surface of the conductive segment 11 of the copper base band 1, and a chromium layer is plated on at least one surface of the conductive segment 11 of the copper base band 1, which is different from the full aluminum layer coated on each surface of the conductive segment 11 of the copper base band 1 in that the chromium layer has higher hardness relative to the aluminum layer, and after the laser welding of the aluminum layer of the negative electrode conductive handle of the soft package lithium battery and the aluminum busbar of the same material is realized, the welded part of the aluminum busbar and the part of the negative electrode conductive handle coated with the conductive coating layer 2 has stronger strength. In addition, the chromium layer has good heat resistance and a small friction coefficient, does not act in alkali, sulfide, nitric acid and most of organic acids, and has good corrosion resistance relative to a nickel layer or an aluminum layer, so that the corrosion resistance of the conductive section 11 of the copper base band 1 is enhanced.
In another embodiment of the present invention, referring to fig. 3, the end surface of the conductive segment 11 away from the end of the welding segment 12 is further covered with a covering layer 4. Through adopting above-mentioned technical scheme, through electroplate or paste on the terminal surface of the one end of keeping away from welding section 12 at conducting segment 11 and have one deck overburden 4, can utilize overburden 4 to play the guard action to the tip of the conducting segment 11 of copper baseband 1 to at the in-process of battery processing, avoid the tip of the conducting segment 11 of copper baseband 1 to produce the phenomenon of scraping flower or even scratch to other components of soft packet of lithium cell, influence the stability of soft packet of lithium cell working property.
In one embodiment of the invention, the cover layer 4 is an aluminum layer or a nickel layer. Through adopting above-mentioned technical scheme, electroplate one deck aluminium lamination or nickel coating on the terminal surface of the one end of keeping away from welding section 12 of conducting segment 11, regard as overburden 4 on the terminal surface of the one end of keeping away from welding section 12 of conducting segment 11 through aluminium lamination or nickel coating, both can play the guard action to the tip of the conducting segment 11 of copper baseband 1, can prevent again that the tip of the one end of keeping away from welding section 12 of conducting segment 11 from oxidizing, corroding, guarantee the stability of the conducting segment 11 working property of copper baseband 1. Of course, the cover layer 4 may be an aluminum layer or a nickel layer, but is not limited thereto. It will be appreciated that in another embodiment of the present invention, the covering layer 4 may also be a chromium layer formed by painting, electroplating or chemically forming on the end surface of the end of the conductive segment 11 away from the welding segment 12, or other dense corrosion-resistant oxide protective layer.
In another embodiment of the present invention, referring to fig. 1, the negative electrode conductive handle further includes a tab glue 3 compounded on the surface of the conductive film layer 2. In this embodiment, through adopting above-mentioned technical scheme, compound one deck utmost point ear gum 3 (film) on electrically conductive tectorial membrane layer 2 surface, utmost point ear gum 3 is compound on aluminium lamination surface promptly, utilizes utmost point ear gum 3 to act as the insulating part of the electrically conductive handle of negative pole to prevent to take place the short circuit between electrically conductive tectorial membrane layer 2 and the plastic-aluminum membrane when soft packet of lithium battery encapsulation. And, when soft package lithium cell encapsulation, through heating utmost point ear glue 3 with the sealed bonding of plastic-aluminum membrane hot melt together, can play good sealed effect, prevent the weeping.
The utility model discloses an embodiment, the material that 3 was glued to the utmost point ear adopts polypropylene (pp material), utilizes polypropylene (pp material) to have good cohesiveness and chemical stability, glues 3 through heating utmost point ear and is in the same place with the sealed bonding of plastic-aluminum membrane hot melt, can play good sealed effect, prevents the weeping.
Of course, the tab film 3 may be a single layer PP tab insulating film, a tab insulating film compounded by a plurality of PP materials with different functions, or a white film, a black film or a yellow film compounded by different materials. The specific material of the tab film 3 (film) can be selected and arranged according to actual needs, and is not limited herein. Specifically, the aluminum plastic film in the present embodiment can be roughly divided into an inner adhesive layer, an intermediate liquid leakage preventing layer, and an outer protective layer. The bonding layer is made of polyethylene or polypropylene material; the liquid leakage prevention layer is generally made of aluminum foil material; the protective layer is made of polyester or nylon material.
The utility model also provides a soft packet of lithium cell, this soft packet of lithium cell include anodal electrically conductive handle, the electrically conductive handle of negative pole and the laminate of being connected with anodal electrically conductive handle and the electrically conductive handle of negative pole, and the electrically conductive handle of negative pole has adopted the utility model discloses the electrically conductive handle of negative pole in any embodiment, the welding section welds with the negative pole copper sheet of laminate. Through adopting above-mentioned technical scheme, adopt copper baseband 1 as the main part of the electrically conductive handle of negative pole, owing to changed the material of the electrically conductive handle of negative pole to carry out ultrasonic bonding through welding section 12 of copper baseband 1 and the negative pole copper sheet of soft packet of lithium cell stack, realize that copper baseband 1 and copper sheet carry out the welding of the same kind of material, improved welding quality and welding goodness, guarantee soft packet of lithium cell working property's stability, increase the circulation life of battery.
In an embodiment of the present invention, the portion of the negative electrode conductive handle covered with the conductive film layer 1 is the same as the thickness of the positive electrode conductive handle of the lithium-ion soft package battery. Through adopting above-mentioned technical scheme, adopt copper baseband 1 as the main part of the electrically conductive handle of negative pole, the material of the electrically conductive handle of negative pole has been changed, and carry out ultrasonic bonding through the welding section 12 of copper baseband 1 and the negative pole copper sheet of soft packet of lithium cell stack, each surface at copper baseband 1's electrically conductive section 11 coats and establishes the electrically conductive tectorial membrane layer 2 of one deck, the thickness that makes the electrically conductive handle of negative pole and soft packet of lithium cell's anodal electrically conductive handle is the same, guarantee the uniformity of soft packet of lithium cell top seal regional thickness, increase the cycle life of battery.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A negative electrode conductive handle is characterized by comprising a copper base band and a conductive film coating layer;
the copper baseband comprises:
a conductive segment; and
the welding section is connected with the conductive section and is used for welding with a negative copper sheet of the soft package lithium battery laminated body;
the conductive coating layer is coated on one side surface or two side surfaces of the conductive section.
2. The negative conductive handle of claim 1, wherein the copper tape has a thickness in a range of 0.15mm to 0.35 mm.
3. The negative electrode conductive handle of claim 1, wherein the conductive film coating layer is an aluminum layer.
4. The negative electrode conductive handle of claim 3, wherein the aluminum layer has a thickness in a range of 0.05mm to 0.1 mm.
5. The negative electrode conductive handle according to claim 1, wherein the conductive film layer is an aluminum layer or a nickel layer provided on one surface of the conductive segment; or the conductive film coating layer is an aluminum layer or a nickel layer coated on the surfaces of the two sides of the conductive section; or the conductive coating layer is an aluminum layer coated on one side surface of the conductive segment and a nickel layer coated on the other side surface of the conductive segment.
6. The negative electrode conductive handle of claim 1, wherein the end surface of the conductive segment distal from the end of the welding segment is further coated with a coating.
7. The negative electrode conductive handle of claim 6, wherein the cover layer is an aluminum layer or a nickel layer.
8. The negative electrode conductive handle of any one of claims 1 to 7, wherein the length of the conductive segment is greater than the length of the welding segment.
9. A soft package lithium battery comprises a positive electrode conductive handle, a negative electrode conductive handle and a laminated body, wherein the laminated body is respectively connected with the positive electrode conductive handle and the negative electrode conductive handle; the negative electrode conductive handle is the negative electrode conductive handle according to any one of claims 1 to 8, and the welding section is welded with the negative electrode copper sheet of the laminated body.
10. The lithium pouch battery of claim 9, wherein the portion of the negative electrode conductive handle coated with the conductive coating layer has the same thickness as the positive electrode conductive handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020548903.4U CN211719697U (en) | 2020-04-14 | 2020-04-14 | Negative electrode conductive handle and soft package lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020548903.4U CN211719697U (en) | 2020-04-14 | 2020-04-14 | Negative electrode conductive handle and soft package lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211719697U true CN211719697U (en) | 2020-10-20 |
Family
ID=72835515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020548903.4U Active CN211719697U (en) | 2020-04-14 | 2020-04-14 | Negative electrode conductive handle and soft package lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211719697U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000179A (en) * | 2021-11-08 | 2022-02-01 | 安徽有研吸气材料有限公司 | Easy-to-weld copper strip for vacuum device |
-
2020
- 2020-04-14 CN CN202020548903.4U patent/CN211719697U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000179A (en) * | 2021-11-08 | 2022-02-01 | 安徽有研吸气材料有限公司 | Easy-to-weld copper strip for vacuum device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5684462B2 (en) | Positive electrode tab lead and battery | |
| KR100789062B1 (en) | Lead wire for nonaqueous electrolyte battery and nonaqueous electrolyte battery | |
| JP6157569B2 (en) | Secondary battery and thermal adhesive insulating film for secondary battery | |
| JP6497320B2 (en) | Manufacturing method of terminal covering resin film for secondary battery | |
| US20070128513A1 (en) | Battery pack | |
| JP2006128096A (en) | Lead wire for non-aqueous electrolyte battery, and non-aqueous electrolyte battery | |
| JP2014132538A (en) | Metal terminal-covering resin film for secondary battery use, method for manufacturing the same, and battery pack | |
| CN211719697U (en) | Negative electrode conductive handle and soft package lithium battery | |
| JP4720186B2 (en) | Battery pack | |
| CN105428660A (en) | Ultrathin lithium ion battery current collector, ultrathin lithium ion battery and preparation method | |
| KR20130074757A (en) | Terminal lead | |
| JP6149528B2 (en) | Lead material | |
| CN204516831U (en) | A kind of lug | |
| KR100871917B1 (en) | A positive tab with a good solder ability and a good corrosion-resistance to salt water for a secondary battery and the fabrication method thereof, and a secondary battery and a secondary battery module using the same | |
| CN201796991U (en) | Integral positive pole piece containing plating lug | |
| CN202058800U (en) | Aluminium polar ear with hole at one end | |
| KR20140116795A (en) | Tab lead | |
| JPH11354087A (en) | Nonaqueous electrolyte battery | |
| JP4639818B2 (en) | Battery pack | |
| JPS58206041A (en) | Thin battery | |
| CN108448043A (en) | A kind of composition metal lug and its soft pack cell | |
| KR20140019753A (en) | Terminal lead | |
| JP5521710B2 (en) | Packaging materials for electrochemical cells | |
| CN215816299U (en) | Anticorrosion and dampproof battery tab | |
| CN101997105A (en) | Electrode lug formed by directly extending positive electrode piece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |