CN101887958A - Double-ended leading-out low internal resistance power storage device - Google Patents
Double-ended leading-out low internal resistance power storage device Download PDFInfo
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- CN101887958A CN101887958A CN2010102106197A CN201010210619A CN101887958A CN 101887958 A CN101887958 A CN 101887958A CN 2010102106197 A CN2010102106197 A CN 2010102106197A CN 201010210619 A CN201010210619 A CN 201010210619A CN 101887958 A CN101887958 A CN 101887958A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a double-ended leading-out low internal resistance power storage device, comprising outer coupling bolts and a connecting part, wherein the outer coupling bolts penetrate through an upper cover plate and an lower cover plate of the device, the connecting part is sealed and positioned in the device, the outer coupling bolts are respectively fixed on the two cover plates by seal insulation pads, leading-out ends thereof are arranged on the two ends of the device, the two ends of a cell are provided with lugs, the bottom of the outer coupling bolts leaded out from the two cover plates and the connecting part stretched into the shell of the device are provided with poles which are used for riveting the lugs, the riveting poles are integrated with the screws and screw heads of the outer coupling bolts, the lugs of the cell are provided with holes corresponding to the riveting poles of the bolts, the lugs are connected with the bolts by the riveting poles, and the power storage device comprises a power storage unit based on the electrochemistry principle and a power storage unit based on the physics principle. By using the double-ended leading-out manner, the lug connection is more reliable, the internal resistance is lowered, the power performance is improved, and the wiring is more flexible. The outer coupling bolts and the internal connecting part are integrated into a whole to reduce connecting resistance and improve power characteristic of the device.
Description
Technical field
The present invention relates to a kind of energy storage device and make the field, be specifically related to a kind of internal structure design of double-ended leading-out low internal resistance power storage device.
Background technology
Power supply is all indispensable piths of various circuit.Do not having under the situation of civil power, only take the mode of power storage could be satisfied the circuit use, therefore various energy storage devices are important component parts of mobile using electricity system, and its performance is directly connected to important indicators such as the useful life, power characteristic of mobile electrical appliance.
Present energy storage device is battery, secondary cell, ultracapacitor etc. once.Primary cell is not chargeable, can't use repeatedly, comprehensive use cost height.But the secondary cell repeated charge is the first-selected energy storage device of present many mobile electrical appliances; At present, common secondary cell has: lead-acid battery, nickel-cadmium cell, Ni-MH battery, lithium ion battery, ultracapacitor etc.Lead-acid battery, nickel-cadmium cell have the pollution of lead, cadmium heavy metal, are just progressively used by the countries in the world restriction; Because the price of nickel rises steadily, the cost performance of Ni-MH battery is also in continuous decline.Lithium ion battery and ultracapacitor are the novel energy-storing devices that occurs in recent years, have tangible performance advantage.Lithium ion battery energy density height, but power density is lower, and the life-span is lacked (about 1000 times); In the ultracapacitor life-span long (can reach more than 100,000 times), power density is big, but energy density is lower.
Device such as electric automobile, the pulse power is all had higher requirement to the power-performance of its energy storage device.Aspect raising energy storage device power-performance, admissible measure has: 1. improve the electrode material prescription, improve the power capability of electrode; 2. improve electrolyte, reduce resistance; 3. improve the lug lead-out mode of electrode, reduce contact resistance.Aspect improving the electrode prescription and improving electrolyte, many researchers have carried out big quantity research, have also obtained bigger progress.After electrode resistance and bath resistance all were reduced to a certain degree, the resistance of drawing of electrode lug just rose to critical positions gradually in whole energy storage device all-in resistance; Promptly need to improve the all-in resistance that the electrode pole ear leading-out could further reduce energy storage device, just can reach the purpose of further raising energy storage device power-performance.But on the lead-out mode of electrode,, make little progress though some improvement are also arranged, as: (1) is connected on the lug of electric core on the brace with supersonic welding, and brace is connected with the external cabling post of energy storage device by rivet; (2) a plurality of lugs of welding on electrode slice are welded on a plurality of lugs on the little metallic plate, and metallic plate is connected with end plate by the jump ring structure, and this mode requires height, processing difficulties to the accuracy of manufacture of jump ring; (3) soldering polar ear on the electrode slice stays a hole in the heart portion of core bag, by this hole an electrode lug of core bag is welded on the bottom of shell with spot welding machine, another utmost point is welded on lug on the end plate with spot welding machine, this mode still will be used lug, and solder joint is few, and internal resistance is still bigger; (4) punch on the lug with electric core, be fixed on the bolt with screw, bolt directly stretches out the energy storage device housing by hermetically-sealed construction, but with screw lug is fixed on the bolt, can cause loose contact because screw is loosening.
Summary of the invention
The objective of the invention is: the deficiency at prior art exists on electrode is drawn provides the design of deriving structure in a kind of double-ended leading-out low internal resistance power storage device, thereby the internal resistance of energy storage device is reduced, reliability increases, power density improves.
The present invention proposes a kind of new electrode pole ear leading-out, and this structure is drawn drawing from two ends of device respectively, helps reducing the internal resistance of energy storage device, improves its power-performance, and has and connect reliable, mode of connection flexible characteristic; And outer connecting bolt and interconnect are designed to one, have reduced connection resistance, improved the power characteristic of energy storage device.The present invention takes following technical scheme for achieving the above object:
A kind of double-ended leading-out low internal resistance power storage device, comprise outside bolt part, hermetic unit that passes the device cover plate and the coupling part that is positioned at device inside (comprising that the riveting column connection is connected with brace), outside bolt as positive and negative electrode is fixed on the energy storage device cover plate by sealed insulating material respectively, it is characterized in that: the energy storage device exit lays respectively at the two ends of device, all leaves lug at the two ends of electric core; The post that is used to rivet lug is left in outside bolt bottom that upper and lower cover plate is drawn and the coupling part of stretching in the energy storage device housing, and screw rod, the screw head of this riveting column and outside bolt are as a whole; Have and the corresponding hole of bolt riveting column on the lug of electricity core, lug links together by riveting column and bolt; Described energy storage device comprises by electrochemical principle and carries out the device of energy storage and the device that is carried out energy storage by physical principle.
The present invention can also be designed to another kind of form with outside bolt and interconnect, and the coupling part in the promptly described energy storage device housing is to be flat brace with holes, and this brace is whole for being connected with screw rod, the screw head of outside bolt; Have on the brace and be used for riveted joint or bolted hole, have on the lug of electric core and the corresponding hole of brace, lug links together by riveted joint or bolt and brace; The lug separated into two parts of electricity core, brace places between these two parts and rivets.Place the pad of protection lug before the riveted joint on the lug two sides, and this pad is provided with and the corresponding riveted holes of brace; Described connection film perforation, corresponding lug hole and pad riveted holes are 1 or a plurality of.
The energy storage device that the present invention is fit to comprises by electrochemical principle and carries out the device of energy storage and the device that carries out energy storage by physical principle, as lithium ion battery, ultracapacitor, mixed capacitor, electrochemical capacitor, double electric layer capacitor, capacitor batteries, high power battery etc.
The material of outside bolt of the present invention is selected one or more in copper or copper alloy, nickel-clad copper alloy, aluminum or aluminum alloy, nickel or nickel alloy, the stainless steel for use.
Energy storage device of the present invention is designed to rectangular structure, has the liquid injection hole of the electrolyte that is used to annotate on the cover plate of described device at least, can also design explosion-proof valve or rupture pressure disc on the cover plate; Can be placed with the anti-rotation support of plastics or rubber between cover plate and the electric core,, prevent that it from moving in application process with fixing electric core; Before the riveted joint of riveting column and lug, place the pad of protection lug on lug, and this pad is provided with and the corresponding riveted holes of bolt riveting column, riveting column, the corresponding lug hole and the pad riveted holes of outside bolt bottom can be 1 or a plurality of; The outside bolt exit of described energy storage device lays respectively at the two ends of device, and wherein each end is provided with 1 or a plurality of outside bolt; The screw head of outside bolt can be arranged on the bottom of screw rod, perhaps is located at the middle part of screw rod.
Characteristics of the present invention are: owing to adopt double-end mode, it is more reliable that lug is connected, and helps reducing the internal resistance of energy storage device, improves its power-performance, and have mode of connection flexible characteristic; Outer connecting bolt and inner connector are designed to one, have further reduced connection resistance, improved the power characteristic of energy storage device; Directly the lug with electric core is riveted on the bolt, has improved the space availability ratio of device inside, helps to improve the volume capacity of device; It is reliable that above-mentioned connection outbound course has connection, connects the little characteristics of resistance, helps improving the power characteristic (large current characteristic) and the volume energy density of energy storage device.
Description of drawings
Fig. 1, Fig. 2 and Fig. 3 are respectively vertical view, end view and the upward views of existing energy storage device cover plate derivation mechanism.
Among the figure: a cover plate, b liquid injection hole, c outside bolt, d rivet, e rupture pressure disc, f sealing gasket, g brace, h bolt base plate.
Fig. 4, Fig. 5 are respectively the bolt connector front view and the upward views of two riveting columns of band of the present invention.
Fig. 6, Fig. 7 are respectively the bolt connector front view and the upward views of a riveting column of band of the present invention.
Fig. 8, Fig. 9 are respectively the bolt connector front view and the end views of band brace.
The electric core schematic diagram that Figure 10 draws for the bipolar ear in two ends.
The electric core schematic diagram that Figure 11 draws for the two ends monopole ear.
Figure 12 is energy storage device electricity core and cover plate syndeton schematic diagram.
Figure 13, Figure 14 are respectively pad front view and the vertical views that the present invention is used to rivet time protection lug.
Embodiment
Also the present invention is described in detail in conjunction with the accompanying drawings below by embodiment, provides Comparative Examples that effect of the present invention is described simultaneously.The following examples just meet the example of the technology of the present invention content, do not illustrate that the present invention only limits to the described content of following example, and the technical staff in the industry all belongs to content of the present invention according to the product of this claim item manufacturing.
Embodiment 1:
1. outer connecting bolt 14 bottoms (promptly stretching into the riveting portion of energy storage device enclosure interior) that the upper and lower cover plate 11 of energy storage device is drawn are designed to the structure of band riveting column 3, as Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, outside bolt 14 is made up of screw rod 1, screw head 2 and riveting column 3, and 1,2,3 are designed to one connects whole.Screw head 2 among Fig. 4, Fig. 5 is positioned at the bolt bottom, is provided with two riveting columns 3 near screw head 2; Screw head 2 among Fig. 6, Fig. 7 is positioned at the bolt middle part, and screw rod 1 bottom is provided with a riveting column 3.
2. according to the manufacturing process of traditional lithium ion battery: batching-stirring-coating-rolling-cut-welding electrode ear winding (lamination) is made into electric core (manufacturing and designing by 20Ah).
3. as Figure 10, shown in Figure 11, go up at the two ends lug 6 (bipolar ear or monopole ear) of the electric core 12 of winding (or lamination is good) and to get and riveting column 3 corresponding lug holes 7 with specific purpose tool.
4. as shown in figure 12, lug hole 6 is aimed at the riveting column 3 of bolt, shell tool 10 (gasket construction is shown in Figure 13,14) in the above then, this pad 10 is provided with and bolt riveting column 3 corresponding riveted holes, and riveting column 3, corresponding lug hole 7 and pad 10 riveted holes are two; With riveting machine the bolt riveting column 3 that pad 10, lug 6 and outside bolt 14 stretch in the device shell is riveted together again, makes riveting column 3 form riveting point 9 at 7 places, lug hole.See Figure 12, the outside bolt 14 that both-end is drawn is fixed in (2 outside bolts of every end are made both positive and negative polarity respectively) on the energy storage device cover plate 11 by sealed insulation pad 16, it is 3003 aluminium alloy that the material positive pole of outside bolt 14 is selected the trade mark for use, and negative pole is selected no lead brass alloy for use; Be provided with clamp nut 13 at outside bolt 14 by insulation cushion 16 places above the cover plate; Cover plate 11 is provided with explosion-proof valve 15; Have the liquid injection hole 8 of the electrolyte that is used to annotate on one side of upper cover plate 11; For preventing that bolt from rotating, and is provided with plastics anti-rotation support 17 in the bottom surface of cover plate 11.
5. according to the subsequent technique of lithium ion battery: seal welding (cover plate and housing are welded together)-drying-notes electrolyte-change into-test can obtain the low internal resistance Li-ion battery product.
6. detect: with battery charge-discharge test instrument the lithium ion battery product of making is tested, discharged and recharged with 1C, its discharge capacity is 20.3Ah, DC internal resistance 3.1m Ω.
Comparative Examples 1:
1. according to the manufacturing process of traditional lithium ion battery: batching-stirring-coating-rolling-cut-welding electrode ear winding (lamination) is made into electric core (manufacturing and designing by 20Ah).
2. the lug of electric core is connected on supersonic welding prior art cover plate (as Fig. 1, Fig. 2, shown in Figure 3) on brace.
3. according to the subsequent technique of lithium ion battery: seal welding (cover plate and housing are welded together)-drying-notes electrolyte-change into-test can obtain the lithium ion battery product.
4. detect: with battery charge-discharge test instrument the lithium ion battery product of making is tested, discharged and recharged with 1C, its discharge capacity is 20.3Ah, DC internal resistance 4.6m Ω.
Embodiment 2:
1. the outer connecting bolt bottom (stretching into the part of energy storage device enclosure interior) with the upper and lower cover plate of energy storage device is designed to a sheet that flat is with holes, as Fig. 8, shown in Figure 9, outside bolt 14 is made up of screw rod 1, screw head 2 and brace 5,1,2,5 is designed to a connection integral body, because brace and bolt are one, do not have the resistance of connection, therefore the internal resistance of whole energy storage device is reduced, help realizing high power (big electric current) output; Have on the brace 5 and be used to rivet or bolt connects the connection film perforation 4 of lug 6;
2. according to the manufacturing process of traditional lithium ion battery: batching-stirring-coating-rolling-cut-welding electrode ear winding (lamination) is made into electric core (manufacturing and designing by 20Ah).
3. as Figure 10, shown in Figure 11, go up with specific purpose tool at the two ends lug 6 (bipolar ear or monopole ear) of the electric core 12 of winding (or lamination is good) and to get and be connected film perforation 4 corresponding lug holes 7 (riveting point of lug and brace), connect film perforation 4, corresponding lug hole 7 and pad 10 riveted holes are two, be riveted on lug on the brace 5 with rivet then or lug 6 be fixed on 4 places, hole of brace 5 correspondences with bolt.
4. the lug 6 with electric core can be divided into two parts, and places the two sides, front and back of brace 5 respectively, and brace places between these two parts and rivets; Fill up lug pad 10 during riveted joint respectively, this pad 10 is provided with and brace 5 corresponding riveted holes (as Figure 13, shown in Figure 14); With rivet pad 10, lug 6, brace 5 are riveted together again, the outside bolt 14 that both-end is drawn is fixed in (2 outside bolts of every end are made both positive and negative polarity respectively) on the energy storage device cover plate by sealed insulation pad 16, it is 6082 aluminium alloy that the material positive pole of outside bolt 14 is selected the trade mark for use, and negative pole is selected 316 stainless steels for use; Be provided with clamp nut 13 at outside bolt 14 by insulation cushion 16 places above the cover plate 11; Cover plate 11 is provided with explosion-proof valve 15; Have the liquid injection hole 8 of the electrolyte that is used to annotate on one side of upper cover plate; In order to prevent that bolt from rotating, and is provided with plastics anti-rotation support 17 in cover plate 11 bottom surfaces.
5. according to the subsequent technique of lithium ion battery: seal welding (cover plate and housing are welded together)-drying-notes electrolyte-change into-test can obtain the low internal resistance Li-ion battery product.
6. detect: with battery charge-discharge test instrument the lithium ion battery product of making is tested, discharged and recharged with 1C, its discharge capacity is 20.3Ah, DC internal resistance 3.5m Ω.
Comparative Examples 2 is with Comparative Examples 1.
Claims (10)
1. double-ended leading-out low internal resistance power storage device, comprise outside bolt part, hermetic unit that passes the device cover plate and the coupling part that is positioned at device inside, outside bolt as positive and negative electrode is fixed on the energy storage device cover plate by sealed insulating material respectively, it is characterized in that: the energy storage device exit lays respectively at the two ends of device, all leaves lug at the two ends of electric core; The post that is used to rivet lug is left in outside bolt bottom that upper and lower cover plate is drawn and the coupling part of stretching in the energy storage device housing, and screw rod, the screw head of this riveting column and outside bolt are as a whole; Have and the corresponding hole of bolt riveting column on the lug of electricity core, lug links together by riveting column and bolt; Described energy storage device comprises by electrochemical principle and carries out the device of energy storage and the device that is carried out energy storage by physical principle.
2. energy-storing device with low internal resistance according to claim 1, it is characterized in that: the coupling part in the described energy storage device housing is to be flat brace with holes, this brace is whole for being connected with screw rod, the screw head of outside bolt, have on the brace and be used for riveted joint or bolted hole, have on the lug of electric core and the corresponding hole of brace, lug links together by riveted joint or bolt and brace.
3. energy-storing device with low internal resistance according to claim 1 and 2 is characterized in that: described energy storage device is a rectangular structure.
4. energy-storing device with low internal resistance according to claim 1 and 2 is characterized in that: this energy storage device is lithium ion battery, ultracapacitor, mixed capacitor, high power battery, capacitor batteries etc.
5. energy-storing device with low internal resistance according to claim 1 and 2 is characterized in that: the material of described outside bolt is selected one or more in copper or copper alloy, nickel-clad copper alloy, aluminum or aluminum alloy, nickel or nickel alloy, the stainless steel for use.
6. energy-storing device with low internal resistance according to claim 1 and 2 is characterized in that: described cover plate is provided with rupture pressure disc or explosion-proof valve, and plastics or rubber anti-rotation support are set between cover plate and the electric core.
7. energy-storing device with low internal resistance according to claim 1 is characterized in that: place the pad of protection lug before the riveted joint on lug, this pad is provided with and the corresponding riveted holes of bolt riveting column; Described riveting column, corresponding lug hole and pad riveted holes are 1 or a plurality of.
8. energy-storing device with low internal resistance according to claim 2 is characterized in that: place the pad of protection lug before the riveted joint on the lug two sides, this pad is provided with and the corresponding riveted holes of brace; Described connection film perforation, corresponding lug hole and pad riveted holes are 1 or a plurality of; The lug separated into two parts of electricity core, brace places between these two parts and rivets.
9. energy-storing device with low internal resistance according to claim 1 is characterized in that: the screw head of described outside bolt is arranged on the bottom of screw rod, perhaps is located at the middle part of screw rod.
10. energy-storing device with low internal resistance according to claim 1 and 2 is characterized in that: the described outside bolt exit that is positioned at the device two ends, wherein each end is provided with one or more outside bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102106197A CN101887958B (en) | 2010-06-24 | 2010-06-24 | Double-ended leading-out low internal resistance power storage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102106197A CN101887958B (en) | 2010-06-24 | 2010-06-24 | Double-ended leading-out low internal resistance power storage device |
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| CN101887958A true CN101887958A (en) | 2010-11-17 |
| CN101887958B CN101887958B (en) | 2012-07-04 |
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| CN2010102106197A Active CN101887958B (en) | 2010-06-24 | 2010-06-24 | Double-ended leading-out low internal resistance power storage device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2518794A1 (en) * | 2011-04-28 | 2012-10-31 | Xu, LianKuan | High-power and large-capacity lithium battery of electric bus |
| CN104316093A (en) * | 2014-10-10 | 2015-01-28 | 中广核工程有限公司 | Sealing device of lead wires of pressure bearing container sensor |
| CN105914334A (en) * | 2015-08-12 | 2016-08-31 | 北京长城华冠汽车科技股份有限公司 | Electrode tab connection device, power battery and automobile |
| KR20170104826A (en) * | 2016-03-08 | 2017-09-18 | 주식회사 엘지화학 | Electrode assembly and secondary battery comprising the same |
| WO2020252802A1 (en) * | 2019-06-21 | 2020-12-24 | 比亚迪股份有限公司 | Battery cell, traction battery pack and vehicle |
| WO2020252803A1 (en) * | 2019-06-21 | 2020-12-24 | 比亚迪股份有限公司 | Single cell battery, power battery pack and vehicle |
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| CN1228866C (en) * | 2002-02-09 | 2005-11-23 | 北京星恒电源有限公司 | Waterless electrolyte battery with safety valve structure on its electrode |
| CN201430191Y (en) * | 2009-07-07 | 2010-03-24 | 湖南业翔晶科新能源有限公司 | Lithium ion secondary power battery |
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Patent Citations (2)
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| CN1228866C (en) * | 2002-02-09 | 2005-11-23 | 北京星恒电源有限公司 | Waterless electrolyte battery with safety valve structure on its electrode |
| CN201430191Y (en) * | 2009-07-07 | 2010-03-24 | 湖南业翔晶科新能源有限公司 | Lithium ion secondary power battery |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2518794A1 (en) * | 2011-04-28 | 2012-10-31 | Xu, LianKuan | High-power and large-capacity lithium battery of electric bus |
| CN104316093A (en) * | 2014-10-10 | 2015-01-28 | 中广核工程有限公司 | Sealing device of lead wires of pressure bearing container sensor |
| CN104316093B (en) * | 2014-10-10 | 2017-10-31 | 中广核工程有限公司 | Pressure resistant vessel sensor outgoing line sealing device |
| CN105914334A (en) * | 2015-08-12 | 2016-08-31 | 北京长城华冠汽车科技股份有限公司 | Electrode tab connection device, power battery and automobile |
| CN105914334B (en) * | 2015-08-12 | 2018-07-17 | 北京长城华冠汽车科技股份有限公司 | A kind of lug attachment device, power battery and automobile |
| KR20170104826A (en) * | 2016-03-08 | 2017-09-18 | 주식회사 엘지화학 | Electrode assembly and secondary battery comprising the same |
| KR102071622B1 (en) | 2016-03-08 | 2020-01-30 | 주식회사 엘지화학 | Electrode assembly and secondary battery comprising the same |
| WO2020252802A1 (en) * | 2019-06-21 | 2020-12-24 | 比亚迪股份有限公司 | Battery cell, traction battery pack and vehicle |
| WO2020252803A1 (en) * | 2019-06-21 | 2020-12-24 | 比亚迪股份有限公司 | Single cell battery, power battery pack and vehicle |
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| Publication number | Publication date |
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| CN101887958B (en) | 2012-07-04 |
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Denomination of invention: Double-ended leading-out low internal resistance power storage device Effective date of registration: 20170614 Granted publication date: 20120704 Pledgee: Rural credit cooperative association of Twin Towers District, Chaoyang City Pledgor: Chaoyang Liyuan New Energy Co., Ltd. Registration number: 2017990000292 |