CN204668382U - A kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug - Google Patents
A kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug Download PDFInfo
- Publication number
- CN204668382U CN204668382U CN201520219148.4U CN201520219148U CN204668382U CN 204668382 U CN204668382 U CN 204668382U CN 201520219148 U CN201520219148 U CN 201520219148U CN 204668382 U CN204668382 U CN 204668382U
- Authority
- CN
- China
- Prior art keywords
- tooth
- negative electrode
- electrode lug
- mould
- lithium ion
- 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
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
Abstract
The utility model relates to a kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug, the middle part of negative electrode lug is provided with convex-concave structure, the central point of convex-concave structure is corresponding with core central point, and the width of convex-concave structure is identical with lug width, and the length of convex-concave structure is 2-6mm.The mould of negative electrode lug comprises patrix and counterdie, and described patrix is positioned at the top of counterdie, and the upper surface of patrix is provided with multiple upper tooth, and the lower surface of counterdie is provided with multiple lower tooth that can be engaged one by one with the upper tooth of patrix.The utility model negative electrode lug surface concave-convex surface; Core negative electrode lug only needs relatively little welding pressure, welding current, weld time with welding of box hat, little to the injury of battery bottom outward appearance like this, contributes to the protection of battery outward appearance in production process; Effective and reasonablely utilize the energy, energy waste is little.
Description
Technical field
The utility model belongs to technical field of lithium ion, relates to a kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug.
Background technology
Lithium ion battery embodies product as the wherein a kind of of new forms of energy concept, and utilization field progressively broadens.Time particularly as electric automobile or high-power output electrical source of power, the electric current of battery (group) moment or continuous discharge is very high; The positive and negative end connection welding overflow section that core both positive and negative polarity lug exports to the energy content of battery is long-pending large, the temperature at guarantee battery solder joint place when heavy-current discharge can not be cumulative too high cause safety problem or useful life problem.
Existing cylindrical lithium ion negative electrode lug surface is without process, and negative electrode lug surface is a plane, amasss with effective welded section of box hat for improving negative electrode lug: strengthen the diameter of capillary 1 or rotate capillary when negative pole welds and carry out twice welding.Strengthen capillary diameter: easily to the positive/negative plate barrier film of battery inner ring damage or waste battery effective use volume, add welding difficulty (solder joint becomes large: welding pressure, weld time, welding current all become large), the energy wasted to some extent.Rotate capillary during negative pole welding and carry out twice welding: battery bottom is destroyed large, easily cause bottom nickel coating to come off; Welding quality is difficult to ensure (may only weld once in production process); Easily caused weldering, battery bottom burn-through or negative electrode lug melt completely (being welded on same point for twice).
Existing cylindrical lithium ion battery core negative electrode lug welds as Fig. 1 with box hat, and the negative electrode lug of use is as Fig. 2.Fig. 1 capillary uses direct current weldering to be welded with box hat by negative electrode lug along welding direction, and the contact of negative electrode lug and box hat only has 1 point, and capillary welding ends planar diameter is about circle or the ellipse of 1mm, the sectional area about 0.5 ~ 1mm of effective solder joint
2, in charge and discharge process electric current limited by value, effectively cannot shunt electric current, when easily causing battery charging and discharging, when pad heating or heavy-current discharge, electric current has little time by causing not put electricity; The surface of Fig. 2 lug is plane, so when lug welds with box hat welding pressure, welding current value, weld time etc. all need larger parameter to ensure soldering reliability, easily can cause energy waste and battery bottom bad order (concave-convex surface point, box hat plating nickel on surface pull-up fall) like this.In order to ensure welding quality, preventing the abnormal qualities such as rosin joint, welding pulling force is not enough, the welding ends of capillary is required that high (the welding ends area of plane, card grinding angle, useful life etc.) also needs to carry out high-frequency regular card grinding simultaneously.
The raising of cylindrical lithium ion battery discharge-rate or the reduction of solder joint accumulation temperature, wherein a kind of mode is: tie point net sectional area battery core both positive and negative polarity being stretched out to lug and battery plus-negative plate lead-out terminal improves, increase the over current value of tie point, reduce the heat history that tie point causes because electric current is excessive, improve the use safety of battery.
Summary of the invention
For effective welded section of the negative electrode lug and box hat that solve existing cylindrical lithium ion battery amasss little technical problem, the utility model provides a kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug.
Technical solution of the present utility model is as follows:
A kind of negative electrode lug of cylindrical lithium ion battery, its special character is: the middle part of described negative electrode lug is provided with convex-concave structure, the central point of described convex-concave structure is corresponding with core central point, and the width of convex-concave structure is identical with lug width, and the length of convex-concave structure is 2-6mm.
A kind of mould making the negative electrode lug of above-mentioned cylindrical lithium ion battery, its special character is: comprise patrix and counterdie, described patrix is positioned at the top of counterdie, the lower surface of described patrix is provided with multiple upper tooth, and the upper surface of described counterdie is provided with multiple lower tooth that can be engaged one by one with the upper tooth of patrix.
Above-mentioned lower tooth and lower tooth include at the bottom of tooth, flank and tooth top, and flank and the angle at the bottom of tooth are 120-150 °, and the angle of the sides adjacent of adjacent two teeth is 120-150 °.
Above-mentioned lower tooth comprises at the bottom of tooth, flank and tooth top, and flank and the angle at the bottom of tooth are 135 °, and the angle of the sides adjacent of adjacent two lower tooths is 135 °.
The width of above-mentioned tooth top is 0.4mm, and the width at the bottom of described tooth is 1.1mm, the width of at the bottom of tooth and both sides spacing and be 1.9mm, and tooth depth is 0.3mm.
The right side of above-mentioned counterdie is provided with lug positioning baffle.
Above-mentioned patrix and counterdie include matrix, tooth bed, and described tooth bed is connected with matrix, and described upper tooth is arranged on the tooth bed of patrix, and described lower tooth is arranged on the tooth bed of counterdie.
The width of above-mentioned tooth bed is less than the width of matrix.
Compared with prior art, advantage is the utility model:
1, the utility model negative electrode lug surface concave-convex surface; Core negative electrode lug only needs relatively little welding pressure, welding current, weld time with welding of box hat, little to the injury of battery bottom outward appearance like this, contributes to the protection of battery outward appearance in production process; Effective and reasonablely utilize the energy, energy waste is little.
2, negative electrode lug of the present utility model is when welding with box hat, and the welding ends planar diameter of capillary can be circle or the ellipse of 2-2.5mm, the sectional area about 2 ~ 3mm of effective solder joint after welding
2, solder joint net sectional area is 3-5 times of plane tab welding, and battery negative electrode lug solder joint when heavy-current discharge can effectively be shunted, and ensures that the accumulation temperature of negative pole solder joint is low.
3, negative electrode lug of the present utility model is relatively low to the requirement of capillary welding ends, only needs the flatness and the efficient weld area that ensure welding plane; Little to the wearing and tearing of capillary in use procedure, can effectively reduce card grinding number of times.Also significantly reduce negative electrode lug in welding process and the rosin joint between box hat simultaneously, weld the abnormal qualities such as value of thrust is low; Show also to substantially increase welding value of thrust by test.
4, the structure that the utility model is concavo-convex can make battery contact when heavy-current discharge to count many, and sectional area is large, and negative electrode lug solder joint is effectively shunted electric current, and the accumulation temperature avoiding negative pole solder joint place is high; Do not waste the effective volume of battery; Welding quality significantly improves, and welding value of thrust becomes large, can not cross weldering and damage battery bottom and lug; Soldering reliability also significantly promotes, and can not cause use safety problem because human factor causes the welded condition of part or Individual cells inconsistent.
5, mould of the present utility model can make negative electrode lug surface concave-convex surface after treatment; And profile of tooth is processed well, damage can not be caused to lug, and can position lug.
Accompanying drawing explanation
Fig. 1 is existing negative pole lug welding schematic diagram;
Fig. 2 is the partial schematic diagram of Fig. 1;
Fig. 3 is negative electrode lug of the present utility model;
Fig. 4 is the partial schematic diagram of negative electrode lug of the present utility model in battery core;
Fig. 5 is mould front view;
Fig. 6 is Fig. 5 partial enlarged drawing;
Fig. 7 a is patrix vertical view, and Fig. 7 b is counterdie vertical view;
Fig. 8 a is patrix right view, and Fig. 8 b is counterdie right view.
Wherein Reference numeral is: at the bottom of 1-capillary, 2-core, 3-negative electrode lug, 4-box hat, 5-patrix, the upper tooth of 51-, 52-matrix, 53-tooth bed, 6-counterdie, 61-lower tooth, 62-lug positioning baffle, 611-tooth, 612-tooth top, 613-flank.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
Core 2 is after winding terminates, and before entering shell, negative electrode lug is by cold pressing or hot pressing is made concaveconvex shape as shown in Figure 3-4.The concavo-convex central point of negative electrode lug after process is corresponding with core central point, and concavo-convex width is lug width, and concavo-convex length is 4.5mm.
Make a mould for the negative electrode lug of above-mentioned cylindrical lithium ion battery, comprise patrix 5 and counterdie 6, the material selection titanium alloy of mould (7075,2024,6061-T651).Patrix 5 is positioned at the top of counterdie 6, and the upper surface of patrix 5 is provided with multiple upper tooth 51, and the lower surface of counterdie 6 is provided with multiple lower tooth 61 that can be engaged one by one with the upper tooth of patrix.Upper tooth and lower tooth to include at the bottom of tooth 611, flank 612 and tooth top 612, and flank and the angle а at the bottom of tooth 1 are 135 °, and the angle а 2 of the sides adjacent of adjacent two teeth is 135 °.The width w1 of tooth top is 0.4mm, and the width w3 at the bottom of tooth is 1.1mm, and the width of at the bottom of tooth and both sides spacing and w2 are 1.9mm, and tooth depth is 0.3mm.The design of the utility model tooth profile parameter at utmost can allow lug processing region generation deformation, and can not produce extreme ear structure simultaneously and destroy, angular range can be extended to 120-150 °.
In order to ensure the consistency of producing; The region dislocation preventing lug from need process causes failure welding or does not reach the desired value of design, and the right side of the utility model counterdie is provided with lug positioning baffle 62.
In order to make to be engaged dynamical stability up and down, lug deformation degree is stablized; Be easy to operation, enhance productivity.Patrix of the present utility model and counterdie include matrix 52, tooth bed 53, and tooth bed is connected with matrix, and upper tooth is arranged on the tooth bed of patrix, and lower tooth is arranged on the tooth bed of counterdie.
The width of the utility model tooth bed is less than the width of matrix, reserved matrix region belongs to lug processing region buffering area, the setting in this region be for avoid core directly be engaged contacting dies, the adsorbing powder dust produced due to vibration during occlusion is surperficial to core, to battery generation potential safety hazard.
When making negative electrode lug, after first mould is fixing, by oil pressure or pneumaticly drive mold to press down, the core negative electrode lug after winding terminates puts into mould, horizontal sliding battery core, and negative electrode lug is contacted with Fig. 8 b bed die lug positioning baffle; Bed die is fixing, makes the downward fast moving of patrix, fast flick again after being engaged completely with counterdie by power; The tooth engaged of upper/lower die is formed concavo-convex in anticathode ear surface under force, and negative electrode lug surface treatment terminates.Welded with negative output terminals box hat by capillary anticathode ear, increase negative electrode lug to amass with the welded section of weld between box hat, weld and count, ensure that battery cathodal current when heavy-current discharge is effectively shunted, improve lithium ion battery use safety coefficient further.
Claims (8)
1. the negative electrode lug of a cylindrical lithium ion battery, it is characterized in that: the middle part of described negative electrode lug is provided with convex-concave structure, the central point of described convex-concave structure is corresponding with core central point, and the width of convex-concave structure is identical with lug width, and the length of convex-concave structure is 2-6mm.
2. one kind makes the mould of the negative electrode lug of cylindrical lithium ion battery according to claim 1, it is characterized in that: comprise patrix and counterdie, described patrix is positioned at the top of counterdie, the lower surface of described patrix is provided with multiple upper tooth, and the upper surface of described counterdie is provided with multiple lower tooth that can be engaged one by one with the upper tooth of patrix.
3. the mould of the negative electrode lug of cylindrical lithium ion battery according to claim 2, is characterized in that:
Lower tooth and lower tooth include at the bottom of tooth, flank and tooth top, and flank and the angle at the bottom of tooth are 120-150 °, and the angle of the sides adjacent of adjacent two teeth is 120-150 °.
4. the mould of the negative electrode lug of cylindrical lithium ion battery according to claim 3, is characterized in that: described lower tooth comprises at the bottom of tooth, flank and tooth top, and flank and the angle at the bottom of tooth are 135 °, and the angle of the sides adjacent of adjacent two lower tooths is 135 °.
5. the mould of the negative electrode lug of cylindrical lithium ion battery according to claim 4, is characterized in that: the width of described tooth top is 0.4mm, and the width at the bottom of described tooth is 1.1mm, the width of at the bottom of tooth and both sides spacing and be 1.9mm, and tooth depth is 0.3mm.
6. the mould of the negative electrode lug of the cylindrical lithium ion battery according to arbitrary claim of claim 2 to 5, is characterized in that: the right side of described counterdie is provided with lug positioning baffle.
7. the mould of the negative electrode lug of cylindrical lithium ion battery according to claim 6, it is characterized in that: described patrix and counterdie include matrix, tooth bed, described tooth bed is connected with matrix, and described upper tooth is arranged on the tooth bed of patrix, and described lower tooth is arranged on the tooth bed of counterdie.
8. the mould of the negative electrode lug of cylindrical lithium ion battery according to claim 7, is characterized in that: the width of described tooth bed is less than the width of matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520219148.4U CN204668382U (en) | 2015-04-10 | 2015-04-10 | A kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520219148.4U CN204668382U (en) | 2015-04-10 | 2015-04-10 | A kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204668382U true CN204668382U (en) | 2015-09-23 |
Family
ID=54138735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520219148.4U Active CN204668382U (en) | 2015-04-10 | 2015-04-10 | A kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204668382U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790907A (en) * | 2017-11-11 | 2018-03-13 | 无锡先导智能装备股份有限公司 | One kind auxiliary welding method, device and welding winding integrated machine |
| WO2023280103A1 (en) * | 2021-07-05 | 2023-01-12 | Damitz Thomas Gerhard Wilhelm | Lithium ion battery |
-
2015
- 2015-04-10 CN CN201520219148.4U patent/CN204668382U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790907A (en) * | 2017-11-11 | 2018-03-13 | 无锡先导智能装备股份有限公司 | One kind auxiliary welding method, device and welding winding integrated machine |
| WO2023280103A1 (en) * | 2021-07-05 | 2023-01-12 | Damitz Thomas Gerhard Wilhelm | Lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208256683U (en) | A kind of electrode structure at right side and solar battery of more main grid batteries | |
| CN204668382U (en) | A kind of negative electrode lug of cylindrical lithium ion battery and the mould of processing negative electrode lug | |
| CN105304856A (en) | Preparation method of negative plate of primary lithium battery | |
| CN109585908A (en) | A kind of flexible packing lithium ion electric core and battery | |
| CN202695607U (en) | Lithium ion battery pole piece | |
| CN104466074A (en) | Flexible package battery lug welding method | |
| CN201877505U (en) | Anode and cathode current collector for secondary batteries | |
| CN201927667U (en) | Novel battery pack with insurance function | |
| CN104091912B (en) | Extremely pole ear welding method of a kind of lithium battery with multi pole ears volume core | |
| CN211208554U (en) | Lithium iron phosphate battery connecting sheet with embossing | |
| CN205985163U (en) | Coupling assembling of battery tab and apron | |
| CN203607420U (en) | Over-welding resistance solar cell electrode | |
| CN101752543A (en) | Production method for improving consistency of internal resistance of battery | |
| CN202523785U (en) | Lug of lithium battery | |
| CN204029914U (en) | The lug of rate positive electrode plate and negative electrode plate of lithium ion battery | |
| CN201340887Y (en) | Pole piece parallel polymer lithium ion battery | |
| CN211728000U (en) | Welding tooth structure of welding head for welding lithium ion battery pole piece | |
| CN205231195U (en) | Box hat cylindrical lithium ion battery | |
| CN205200749U (en) | Lithium electropolymerization thing battery protection shield welding set | |
| CN216311999U (en) | Battery cell and lithium ion battery | |
| CN218827244U (en) | Cylindrical lithium battery current collector disc and cylindrical lithium battery | |
| CN104157824A (en) | Conduction band and battery employing same | |
| JP2014197456A (en) | Method of positive electrode grid body for lead-acid storage battery and lead-acid storage battery | |
| CN205488390U (en) | Ability reduction in production cost's battery | |
| CN101714457A (en) | Aluminum electrolytic capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |