CN203218365U - Lithium ion battery point bottom connecting piece - Google Patents
Lithium ion battery point bottom connecting piece Download PDFInfo
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- CN203218365U CN203218365U CN2013200887266U CN201320088726U CN203218365U CN 203218365 U CN203218365 U CN 203218365U CN 2013200887266 U CN2013200887266 U CN 2013200887266U CN 201320088726 U CN201320088726 U CN 201320088726U CN 203218365 U CN203218365 U CN 203218365U
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- lithium ion
- ion battery
- burr
- substrate
- point end
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a lithium ion battery point bottom connecting piece which comprises a connecting substrate and burrs arranged on both sides of the connecting substrate. Burrs are arranged on the upper and lower surfaces of the connecting substrate. In the welding process, large current is discharged through the burrs, so that the burrs can be effectively melted at the moment. A lug and the lithium ion battery point bottom connecting piece as well as the lithium ion battery point bottom connecting piece and the bottom of the lithium ion battery shell are firmly melted, so that cold solder joint can be effectively overcome, the welding strength is improved and the internal resistance is reduced. The lithium ion battery point bottom connecting piece is efficient and reliable in performance. The lithium ion battery point bottom connecting piece disclosed by the utility model is in particular suitable for lithium ion batteries with multi-lug copper strips, that is to say, the copper strips are used as the lugs. With the adoption of the lithium ion battery point bottom connecting piece disclosed by the utility model, cold solder joint is remarkably reduced, the welding strength is remarkably improved, and the internal resistance is remarkably reduced.
Description
Technical field
The utility model relates to the lithium ion battery field, is specifically related to a kind of lithium ion battery point end brace.
Background technology
The chargeable lithium ion secondary cell has the characteristic of high-energy-density, long circulation life, memory-less effect, have again safety, reliable and can fast charging and discharging etc. advantage, thereby become the focus of novel power supply technical research in recent years.Because lithium ion battery is the free of contamination secondary cell of environmental type, meet the big growth requirement in countries nowadays energy environment protection aspect, increase sharply in the use amount of all trades and professions.Resource and environmental issue in the global range in recent years, cause the application of conventional secondary cell in minitype motivation fields such as electric bicycle, electric tools such as lithium ion battery replacement nickel hydrogen battery, lead-acid battery to increase fast, the electric automobile field is to the demand fast rise of lithium ion battery simultaneously, and its development prospect is boundless.
Conventional small-sized cylindrical lithium ion battery as batteries such as 18650,26650 at IT industry, illuminating industry and other UPS(uninterrupted power supply) energy-storage battery lamp field obtains broad development.And along with quick expansion and the developing rapidly plumbic acid and Ni-MH battery industry alternate application field in other sector application of lithium ion battery in recent years, conventional small-sized cylindrical lithium ion battery more and more trends towards the electrokinetic cell development, and is also more and more higher to the discharge-rate requirement of conventional cylindrical lithium ion battery.Traditional conventional small-sized cylindrical lithium ion battery adopts the monopole ear structure more, the internal resistance of cell is bigger, not fitting into high-multiplying power discharge uses, in order to improve the discharge-rate of battery, the lithium ion battery of minitype motivation type need adopt the lug more than 2, to reduce the internal resistance of cell, increase the lug flow conductivity, thereby improve the high-rate discharge capacity of lithium ion battery, the demanding lithium ion battery of some multiplying power, rate of charge reaches 5C, and discharge-rate surpasses 20C, lithium ion battery even 3～5 lugs of needs, and adopt copper strips as connecting the water conservancy diversion lug, the increase of lug number has caused difficulty for the some bottom technique of conventional box hat lithium ion battery, the battery that especially adopts the multipole ear structure of copper strips at the bottom of be easy to form rosin joint in the process, influence quality and the qualification rate of product.
China utility model patent ZL 201020110588.3 discloses a kind of cylindrical lithium ion battery laser welding block anchor clamps, these anchor clamps comprise base plate, this base plate is provided with first groove that can hold naked electric core, second groove that can hold block, the three-flute of conveniently taking and blocking a shot, these anchor clamps also comprise supporting seat and end finger, end finger and supporting seat are hinged, supporting seat is fixedlyed connected with base plate, the pressure head of end finger is provided with the through hole that passes for laser beam, through hole is positioned at the top of second groove, the quantity of end finger equates with the quantity of second groove, be provided with spring between the handle of end finger and supporting seat, spring one end and handle offset, and the other end and supporting seat offset.Utilize these anchor clamps to compress battery pole ear and when block, manually can confirm in advance battery pole ear and block whether contact good, whether the position correct, thereby reduce the rosin joint rate, the raising rate of finished products has improved production efficiency simultaneously.Though this technical scheme reduces the rosin joint rate from the anchor clamps angle, when a plurality of lugs weld with block, still be easier to cause rosin joint, need further overcome the rosin joint phenomenon.
The utility model content
The utility model provides a kind of lithium ion battery point end brace, in the upper and lower surface that connects substrate burr is set all, can effectively eliminate the appearance of rosin joint phenomenon in the lithium ion battery point end process, can effectively improve weld strength and reduce internal resistance.
A kind of lithium ion battery point end brace comprises connecting substrate and being arranged on the burr that connects the substrate both sides.
The utility model lithium ion battery point end brace, owing in the upper and lower surface that connects substrate burr is set all, big electric current discharges by burr in welding process, can effectively melt burr in moment, with lug and lithium ion battery point end brace is welded together securely and the bottom that lithium ion battery is put end brace and casing of lithium ion battery is welded together securely.Adopt the utility model lithium ion battery point end brace can effectively overcome the rosin joint phenomenon that occurs in the multipole auriculare back welding termination process, improve weld strength, reduce internal resistance, be a kind of efficiently, the lithium ion battery point end brace of dependable performance.The utility model lithium ion battery point end brace is particularly suitable for preparing the lithium ion battery of multipole ear copper strips, and behind use the utility model lithium ion battery point end brace, the rosin joint phenomenon significantly reduces, and weld strength obviously improves, and internal resistance obviously reduces.
As preferably, described burr is the burr of hollow-core construction or the burr of entity structure.The bottom that the burr of hollow-core construction and the burr of entity structure all are conducive to lug and lithium ion battery point end brace and lithium ion battery point end brace and casing of lithium ion battery is welded together securely, effectively avoid the appearance of rosin joint phenomenon, improve weld strength, and can effectively reduce internal resistance.
The utility model lithium ion battery point end brace is suitable for preparing cylindrical lithium ion battery very much, as preferably, described connection substrate is the disk shape, the point basic skill or training order of cylindrical lithium ion battery is easier to occur the rosin joint phenomenon, by connecting the substrate both sides at the disk shape burr is set, big electric current discharges by burr in the welding process, can effectively melt burr in moment, the bottom of lug and lithium ion battery point end brace and lithium ion battery point end brace and casing of lithium ion battery is welded together securely, can effectively eliminate the appearance of rosin joint phenomenon in the lithium ion battery point end process, and effectively reduce internal resistance.
Further preferred, the burr that the disk shape connects a side on the substrate is positioned at the middle part that this disk shape connects substrate, the burr of opposite side is positioned at the periphery that this disk shape connects substrate, the burr that is positioned at the middle part of this disk shape connection substrate can be so that lug and lithium ion battery point end brace be welded together securely, and the burr that is positioned at the periphery of this disk shape connection substrate can be so that the bottom of lithium ion battery point end brace and casing of lithium ion battery be welded together securely.The burr of this structure makes that the burr of upper and lower surface setting can not produce interference in the utility model lithium ion battery point end brace point back welding termination process, and, after a back welding connects, have better weld strength and have lower internal resistance.
Can design the burr of varying number according to the needs of battery conductive.Further preferred, the burr that is arranged on the middle part of disk shape connection substrate is four, these four burrs are square profile, namely these four burrs are positioned on foursquare four summits, the burr that is arranged on the periphery of disk shape connection substrate is eight, these eight burrs are distributed on the same circle and evenly and distribute, and this circle is the center of circle with the center that the disk shape connects substrate.Above-mentioned setting is welded together securely except the bottom that can guarantee lug and lithium ion battery point end brace and lithium ion battery point end brace and casing of lithium ion battery, the more important thing is, can further improve weld strength and further reduce internal resistance.Further preferred, these four burrs distribute on foursquare four summits, and the center that connects substrate with the disk shape is as this foursquare center, and the summit on the square and the distance at foursquare center are 1～3mm.Eight burrs are distributed on the circle that radius is 4～7mm, evenly distribute according to 45 °, and the angle that namely is connected with the disk shape between adjacent two burrs in eight burrs between the center of substrate is 45 °.
As preferably, the height of described burr is 0.2～1.5 millimeter, diameter is 0.1～2.0 millimeter, and the bottom that the burr of above-mentioned size more is conducive to lug and lithium ion battery point end brace and lithium ion battery point end brace and casing of lithium ion battery is welded together securely.
Connect the too thin meeting of substrate and reduce weld strength, too thick meeting increases internal resistance, as preferably, the thickness of described connection substrate is 0.1～1.0mm, the connection substrate of above-mentioned thickness can be so that the bottom of lug and lithium ion battery point end brace and lithium ion battery point end brace and casing of lithium ion battery be welded together securely, and, can effectively reduce internal resistance.The utility model does not have specific (special) requirements to the size that connects substrate, can specifically select according to the capacity of lithium ion battery and the size of casing of lithium ion battery.
As preferably, described connection substrate is the nickel plating steel disc, and the material of described burr is identical with the material that connects substrate, and above-mentioned material just can satisfy instructions for use well.
A kind of preparation method of lithium ion battery, by the mechanical stamping method two Surface Machining of nickel plated steel strip are gone out burr, obtain lithium ion battery point end brace through punching press again, put back welding then and connect, obtain lithium ion battery through subsequent treatment again, can improve rate of finished products greatly.
A kind of preparation method of lithium ion battery may further comprise the steps:
1) by the mechanical stamping method two Surface Machining of nickel plated steel strip is gone out burr, according to the punching press of casing of lithium ion battery size, obtain lithium ion battery point end brace;
2) earlier with casing of lithium ion battery and the welding of lithium ion battery point end brace, then lithium ion battery is put the lug point back welding that has on end brace and the electric core and connect, obtain lithium ion battery through subsequent treatment again.
Step 2) in, as preferably, describedly is welded as energy storage welding or inversion welding.Plumb joint adopts hollow-core construction, when making the welding of casing of lithium ion battery and lithium ion battery point end brace, prevent in welding process the burr structure of loss lithium ion battery point end brace upper surface, the burr structure of upper surface refers to for the burr that connects with lug point back welding.
Compared with prior art, the utlity model has following advantage:
The utility model lithium ion battery point end brace, in the upper and lower surface that connects substrate burr is set all, big electric current discharges by burr in welding process, can effectively melt burr in moment, the bottom of lug and lithium ion battery point end brace and lithium ion battery point end brace and casing of lithium ion battery is welded together securely.Adopt the utility model lithium ion battery point end brace can effectively overcome the rosin joint phenomenon that occurs in the multipole auriculare back welding termination process, improve weld strength, reduce internal resistance, be a kind of efficiently, the lithium ion battery point end brace of dependable performance.The utility model lithium ion battery point end brace is particularly suitable for preparing the lithium ion battery of multipole ear copper strips, namely with copper strips as lug, use the utility model lithium ion battery point end brace after, the rosin joint phenomenon significantly reduces, weld strength obviously improves, and internal resistance obviously reduces.
The preparation method of lithium ion battery, the processing of burr can be finished by punching press, method is simple, and is easy to implement, workable, and, after adopting lithium ion battery point end brace, can effectively overcome the rosin joint phenomenon that occurs in the lithium ion battery point back welding termination process, improve weld strength, reduce internal resistance, improve rate of finished products greatly, also improve the comprehensive electrochemical properties of lithium ion battery simultaneously.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model lithium ion battery point end brace;
Fig. 2 is the cross-sectional view of lithium ion battery point end brace among Fig. 1;
Fig. 3 is the another kind of structural representation of the utility model lithium ion battery point end brace;
Fig. 4 is the cross-sectional view of lithium ion battery point end brace among Fig. 3;
Fig. 5 is the schematic diagram of casing of lithium ion battery, lithium ion battery point end brace and lug welding.
Embodiment
As shown in Figure 1 and Figure 2, be the utility model lithium ion battery point end brace, comprise connecting substrate 1 and being arranged on the burr 2 that connects substrate 1 both sides that burr 2 is the burr of hollow-core construction.
As shown in Figure 3, Figure 4, be the utility model lithium ion battery point end brace, comprise connecting substrate 1 and being arranged on the burr 2 that connects substrate 1 both sides that burr 2 is the burr of entity structure.
As Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, connect substrate 1 and be the disk shape, the burr 2(that the disk shape connects a side on the substrate 1 is the burr 2 that the disk shape connects substrate 1 upper surface) be positioned at the middle part that this disk shape connects substrate 1, the burr 2(of opposite side is the burr 2 that the disk shape connects substrate 1 lower surface) be positioned at the periphery that this disk shape connects substrate 1, be positioned at this disk shape connect substrate 1 the middle part burr 2 can so that lug 5 and lithium ion battery point end brace 1(as shown in Figure 5) be welded together securely, the burr 2 that is positioned at the periphery of this disk shape connection substrate 1 can be so that the bottom (as shown in Figure 5) of lithium ion battery point end brace 1 and casing of lithium ion battery 3 be welded together securely.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, particularly, the burr 2 that is arranged on the middle part of disk shape connection substrate 1 is four, these four burrs 2 are square profile, namely these four burrs 2 are positioned on foursquare four summits, being arranged on the burr 2 that the disk shape connects the periphery of substrate 1 is eight, and these eight burrs 2 are distributed on the same circle and evenly and distribute, and this circle connects the center of substrate 1 as the center of circle with the disk shape.The height of burr 2 is 0.2～1.5 millimeter, and diameter is 0.1～2.0 millimeter, and the thickness that connects substrate 1 is 0.1～1.0mm.Connect substrate 1 and be the nickel plating steel disc, the material of burr 2 is identical with the material that connects substrate 1.
As shown in Figure 5, a kind of preparation method of lithium ion battery may further comprise the steps:
1) by the mechanical stamping method two Surface Machining of nickel plated steel strip are gone out burr 2, according to casing of lithium ion battery 3 big or small punching presses, obtain lithium ion battery point end brace, standby after the oil removing oven dry;
2) earlier with casing of lithium ion battery 3 and the welding of lithium ion battery point end brace, then lithium ion battery being put 5 back weldings of lug that have on end brace and the electric core connects, plumb joint 4 big electric current in welding process discharges by burr 2, can effectively melt burr 2 in moment, bottom and the lug 5 of lithium ion battery being put end brace and casing of lithium ion battery 3 are welded together securely with lithium ion battery point end brace, obtain lithium ion battery through subsequent treatment again.
Step 2) in, describedly is welded as energy storage welding or inversion welding.Plumb joint adopts hollow-core construction.
As depicted in figs. 1 and 2, the utility model lithium ion battery point end brace (being specially 18650 a lithium-ion-power cells point end brace) comprises connecting substrate 1 and being arranged on the burr 2 that connects substrate 1 both sides that burr 2 is the burr of hollow-core construction.Connect substrate 1 and be the disk shape, the burr 2(that the disk shape connects a side on the substrate 1 is the burr 2 that the disk shape connects substrate 1 upper surface) be positioned at the middle part that this disk shape connects substrate 1, the burr 2(of opposite side is the burr 2 that the disk shape connects substrate 1 lower surface) be positioned at the periphery that this disk shape connects substrate 1.The burr 2 that is arranged on the middle part of disk shape connection substrate 1 is four, these four burrs 2 are square profile, these four burrs 2 distribute on foursquare four summits, the center that connects substrate 1 with the disk shape is as this foursquare center, and the summit on the square and the distance at foursquare center are 2mm.The burr 2 that is arranged on the periphery of disk shape connection substrate 1 is eight, these eight burrs 2 are distributed on the same circle and evenly and distribute, this radius of a circle is 5mm, connect the center of substrate 1 as the center of circle with the disk shape, evenly distribute according to 45 °, the angle that namely is connected with the disk shape between adjacent two burrs 2 in eight burrs 2 between the center of substrate 1 is 45 °.The height of burr 2 is 0.5 millimeter, and diameter is 0.5 millimeter, and the thickness that connects substrate 1 is 0.2mm, and the diameter that connects substrate 1 is 12mm.Connect substrate 1 and be the nickel plating steel disc, the material of burr 2 is identical with the material that connects substrate 1, and burr 2 is hollow-core construction.
As shown in Figure 5, casing of lithium ion battery 3(box hat) size is as shown in table 1, and unit is mm, and wherein, external diameter, internal diameter all refer to diameter.
Table 1
| Model | External diameter ± 0.05 | Internal diameter ± 0.05 | Highly ± 0.1 | Shell wall is thick ± and 0.02 | Base frame |
| 18650 | 18 | 17.52 | 66.9 | 0.24 | 13.5 |
Casing of lithium ion battery 3 is cylindrical, the bottom of casing of lithium ion battery 3 outwards convexes to form base frame, base frame is truncated cone-shaped, less bottom surface (being the cross section) and the side of the area of truncated cone-shaped base frame is the part of casing of lithium ion battery 3, the less bottom surface of the area of truncated cone-shaped base frame (is the cross section, also deserve to be called the bottom surface) diameter be 13.5mm, the diameter of the bottom surface that truncated cone-shaped base frame area is bigger is 16mm, namely truncated cone-shaped base frame maximum gauge is 16mm.
As shown in Figure 5, the preparation method of lithium ion battery may further comprise the steps:
1) by the mechanical stamping method two Surface Machining of nickel plated steel strip are gone out burr 2, according to casing of lithium ion battery 3 big or small punching presses, obtain the lithium ion battery point end brace of embodiment 1, standby after the oil removing oven dry;
2) earlier with casing of lithium ion battery 3 and the welding of lithium ion battery point end brace, then lithium ion battery being put 5 back weldings of lug that have on end brace and the electric core connects, plumb joint 4 big electric current in welding process discharges by burr 2, can effectively melt burr 2 in moment, bottom and the lug 5 of lithium ion battery being put end brace and casing of lithium ion battery 3 are welded together securely with lithium ion battery point end brace, obtain lithium ion battery through subsequent treatment again.
Welding adopts the stored energy welding mode to weld, and plumb joint adopts hollow-core construction, and electric core design capacity is 2000mAh, positive electrode be ternary material [nickle cobalt lithium manganate Li(NiCoMn) O
2].The electricity core adopts the thick nickel strap of the copper strips of 0.06mm thickness or 0.1mm as lug, and two kinds of specifications of monopole ear and bipolar ear are arranged, and has carried out 3 batches of contrast tests respectively altogether, and the battery number of welding is 100 at every turn.Average internal resistance test refers to that after battery liquid-filling changes into the overall internal resistance of adopting Japan day to put HIOKI3555 cell tester test battery is battery internal resistance test method commonly used in the lithium ion battery industry production.Concrete testing result is as shown in table 2 below.
Table 2
According to the welding testing result, when adopting nickel as lug, no matter monopole ear or bipolar ear adopt the utility model lithium ion battery point end brace to occurring rosin joint in the welding process certain benefit to be arranged, can improve the internal resistance of battery simultaneously.And when adopting copper as lug, adopt the utility model lithium ion battery point end brace can significantly reduce rosin joint phenomenon in the battery welding process, the while is reduced the internal resistance of cell significantly, and is more obvious when especially adopting bipolar ear.Therefore, the utility model lithium ion battery point end brace, can effectively overcome at the bottom of the multipole auriculare of electric core the rosin joint phenomenon that occurs in the multipole auriculare back welding of the copper strips termination process especially, improve weld strength, reduce internal resistance, be a kind of reliable lithium ion battery point end brace.
Claims (8)
1. a lithium ion battery point end brace is characterized in that, comprises connecting substrate and being arranged on the burr that connects the substrate both sides.
2. lithium ion battery point end brace according to claim 1 is characterized in that, described burr is the burr of hollow-core construction or the burr of entity structure.
3. lithium ion battery point end brace according to claim 1 and 2 is characterized in that, described connection substrate is the disk shape.
4. lithium ion battery point end brace according to claim 3 is characterized in that, the burr that the disk shape connects a side on the substrate is positioned at the middle part that this disk shape connects substrate, and the burr of opposite side is positioned at the periphery that this disk shape connects substrate.
5. lithium ion battery point end brace according to claim 4, it is characterized in that, the burr that is arranged on the middle part of disk shape connection substrate is four, these four burrs are square profile, the burr that is arranged on the periphery of disk shape connection substrate is eight, and these eight burrs are distributed on the same circle and evenly and distribute.
6. lithium ion battery point end brace according to claim 1 and 2 is characterized in that, the height of described burr is 0.2～1.5 millimeter, and diameter is 0.1～2.0 millimeter.
7. lithium ion battery point end brace according to claim 1 is characterized in that, the thickness of described connection substrate is 0.1～1.0mm.
8. lithium ion battery point end brace according to claim 1 is characterized in that, described connection substrate is the nickel plating steel disc, and the material of described burr is identical with the material that connects substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200887266U CN203218365U (en) | 2013-02-27 | 2013-02-27 | Lithium ion battery point bottom connecting piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200887266U CN203218365U (en) | 2013-02-27 | 2013-02-27 | Lithium ion battery point bottom connecting piece |
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| CN203218365U true CN203218365U (en) | 2013-09-25 |
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| CN2013200887266U Expired - Fee Related CN203218365U (en) | 2013-02-27 | 2013-02-27 | Lithium ion battery point bottom connecting piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117370A (en) * | 2013-02-27 | 2013-05-22 | 浙江吉能电池科技有限公司 | Lithium ion battery point bottom connecting piece and preparation method of lithium ion battery |
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2013
- 2013-02-27 CN CN2013200887266U patent/CN203218365U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117370A (en) * | 2013-02-27 | 2013-05-22 | 浙江吉能电池科技有限公司 | Lithium ion battery point bottom connecting piece and preparation method of lithium ion battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 Termination date: 20150227 |
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| EXPY | Termination of patent right or utility model |