CN101887959B - Riveted low-internal-resistance energy storage device - Google Patents
Riveted low-internal-resistance energy storage device Download PDFInfo
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- CN101887959B CN101887959B CN2010102106214A CN201010210621A CN101887959B CN 101887959 B CN101887959 B CN 101887959B CN 2010102106214 A CN2010102106214 A CN 2010102106214A CN 201010210621 A CN201010210621 A CN 201010210621A CN 101887959 B CN101887959 B CN 101887959B
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- energy storage
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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 invention provides a riveted low-internal-resistance energy storage device, comprising externally connected bolt penetrating a device cover plate, a seal connecting piece positioned inside the device, wherein the externally connected bolts as anode and cathode are respectively fixed on the cover plate through a seal insulation pad; the externally connected bolt bottom of the cover plate and the part extending into a device shell are a flat-shaped sheet with holes; the screw, screw head and the connecting piece of the externally connected bolt is a connecting integral; the connecting piece is provided with connecting holes; the electrode ear of an electric core is provided with holes corresponding to the connecting piece; the electrode ear is connected with the connecting piece through riveting or the bolt; the energy storage device comprises a device which stores energy by using an electrochemical principle and a device which stores energy by using a physical principle. In the riveted low-internal-resistance energy storage device of the invention, the connecting piece and the externally connected bolt are designed into a whole, which reduces connection and lowers connection resistance; and as having larger effective area, the integrated connecting piece has the reliable connection, small connection resistance when being connected on the connecting piece, and is beneficial for improving power characteristics of the energy storage devices.
Description
Technical field
The present invention relates to a kind of energy storage device and make the field, be specifically related to the cover plate design in a kind of riveted low-internal-resistance energy storage device internal structure.
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 the important component parts that move using electricity system, and its performance is directly connected to important indicators such as useful life of moving electrical appliance, power characteristic.
Present energy storage device is battery, secondary cell, ultracapacitor etc. once.Primary cell is not chargeable, can't use repeatedly, and comprehensive use cost is high.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.The lithium ion battery energy density is high, 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 improve the electrode pole ear leading-out, could further reduce the all-in resistance of energy storage device, thereby 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 through 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 through 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, through 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 through 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: be directed against the deficiency that prior art exists on electrode lead-out process; The cover plate design of electrode lead-out process in a kind of riveted low-internal-resistance energy storage device is provided, thereby the internal resistance of energy storage device is reduced, reliability increases, power density improves.
Propose a kind of new electrode pole ear leading-out in the cover plate design of the present invention, this structure helps reducing the internal resistance of energy storage device, improves its power-performance, and has the connection reliable characteristics.Be about to outside bolt and inner brace and be designed to one,, improve the power characteristic of energy storage device, take following technical scheme for realizing above-mentioned purpose the present invention to reduce to connect resistance:
A kind of riveted low-internal-resistance energy storage device; Comprise outside bolt part, hermetic unit that passes the device cover plate and the brace part that is positioned at device inside; Outside bolt as positive and negative electrode is fixed on the energy storage device cover plate through sealed insulating material respectively; It is characterized in that: the outside bolt bottom of said cover plate and the part that stretches in the energy storage device housing are to be flat brace with holes, and the screw rod of this outside bolt, screw head and brace are as a whole, have on the brace to be used for riveted joint or bolted hole; On the lug of electric core, have and the corresponding hole of brace, the lug of electric core links together through riveted joint or bolt and brace; Described energy storage device comprises the device that is carried out the device of energy storage and carried out energy storage by physical principle by electrochemical principle.
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 that this energy storage device is: lithium ion battery, ultracapacitor, mixed capacitor, electrochemical capacitor, double electric layer capacitor, capacitor batteries, high power battery etc.
The material of outside bolt according to the invention is selected from one or more in copper or copper alloy, nickel-clad copper alloy, aluminum or aluminum alloy, nickel or nickel alloy, the stainless steel.
At least be provided with the liquid injection hole of the electrolyte that is used to annotate on the cover plate of the present invention, can also be designed with explosion-proof valve or rupture pressure disc on the cover plate; Can place the anti-rotation support of plastics or rubber between electricity core and the cover plate,, prevent that it from moving in application process with fixing electric core; The lug of electricity core can separated into two parts, and places the two sides, front and back of brace respectively, and brace places between these two parts and rivets.The preceding pad of placing the protection lug on the lug two sides of riveted joint, and this pad is provided with and the corresponding riveted holes of brace.Linking to each other with outside bolt, to be positioned at riveted holes on the device inside brace be 1 or more than 1.
Characteristics of the present invention are: since brace is as a whole with outer connecting bolt design, connection reduced, reduced connection resistance; Because the brace effective area of the one that is designed is bigger, be connected on the above-mentioned brace through rivet or bolt again, it is reliable that this method of attachment has connection, connects the little characteristics of resistance, therefore helps improving the power characteristic (large current characteristic) of energy storage device.
Description of drawings
Fig. 1 Fig. 2 Fig. 3 is respectively vertical view, end view and the upward view 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 end views of band brace.
Fig. 6 is the electric core sketch map of energy storage device.
Fig. 7 is the electric core and the housing cover syndeton sketch map of energy storage device.
Fig. 8, Fig. 9 are respectively pad front view and the vertical views that the present invention is used to rivet time protection lug.
Embodiment
Through embodiment and combine accompanying drawing that the present invention is elaborated, provide Comparative Examples that effect of the present invention is described simultaneously below.Following embodiment just meets the instance of technology contents of the present invention, does not explain that the present invention only limits to the described content of following instance, 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. the outer connecting bolt bottom (stretching into the part of energy storage device enclosure interior) on the energy storage device cover plate is designed to a sheet that flat is with holes; Like Fig. 4, shown in Figure 5, outside bolt 15 is made up of screw rod 1, screw head 2 and brace 3, and 1,2,3 are designed to an integral body (whole processing); 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; Having two on the brace 3 is used to rivet or bolt connects the connection film perforation 4 of lug;
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 shown in Figure 6; On the lug 6 of the electric core 5 of winding (or lamination is good), get lug hole 7 (riveting point of lug and brace), with rivet lug is riveted on the brace 3 then or lug is fixed on corresponding 4 places, hole of brace 3 with bolt with specific purpose tool.
4. lug 6 can also be divided into two parts, and place the two sides, front and back of brace 3 respectively, pad is gone up lug pad 14 respectively then, and this pad is provided with and the corresponding riveted holes of brace (like Fig. 8, shown in Figure 9); Again with rivet with pad 14, lug 6, brace 3 be riveted together (as shown in Figure 7); Outside bolt 15 is fixed in (each one of both positive and negative polarity) on the energy storage device cover plate through sealed insulation pad 11; It is 3003 aluminium alloy that the material positive pole of outside bolt 3 is selected the trade mark for use, and negative pole is selected no lead brass alloy for use; Be provided with clamp nut 10 at outside bolt 15 by insulation cushion 11 places above the cover plate; Cover plate 8 is provided with rupture pressure disc or explosion-proof valve 13; Have the liquid injection hole 9 of the electrolyte that is used to annotate on one side at cover plate; In order to prevent that bolt from rotating, and is provided with plastics anti-rotation support 12 in cover plate 8 bottom surfaces.
5. according to the subsequent technique of lithium ion battery: sealing 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 appearance the lithium ion battery product of processing is tested, discharged and recharged with 1C, its discharge capacity is 20.3Ah, DC internal resistance 3.5m 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. with the lug of electric core be connected on supersonic welding prior art cover plate (like Fig. 1～shown in Figure 3) on brace.
3. according to the subsequent technique of lithium ion battery: sealing 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 appearance the lithium ion battery product of processing is tested, discharged and recharged with 1C, its discharge capacity is 20.3Ah, DC internal resistance 4.6m Ω.
Claims (6)
1. riveted low-internal-resistance energy storage device; Comprise outside bolt part, hermetic unit that passes the device cover plate and the brace part that is positioned at device inside; Outside bolt as positive and negative electrode is fixed on the energy storage device cover plate through sealed insulating material respectively; Passing the outside bolt bottom of cover plate and the part that stretches in the energy storage device housing is to be flat brace with holes, and the screw rod of this outside bolt, screw head and brace are as a whole, have the hole that is used to rivet on the brace; On the lug of electric core, have and the corresponding hole of brace, lug links together through riveted joint and brace; Described energy storage device comprises the device that is carried out the device of energy storage and carried out energy storage by physical principle by electrochemical principle; It is characterized in that: the lug separated into two parts of electric core, brace places between these two parts and rivets, and places the pad of protection lug on the lug two sides, and this pad is provided with and the corresponding riveted holes of brace; Between described cover plate and the electric core anti-rotation support is set.
2. energy-storing device with low internal resistance according to claim 1 is characterized in that: described energy storage device is lithium ion battery, ultracapacitor, mixed capacitor, high power battery, capacitor batteries.
3. energy-storing device with low internal resistance according to claim 1 is characterized in that: the material of said outside bolt is selected from least a in copper or copper alloy, nickel-clad copper alloy, aluminum or aluminum alloy, nickel or nickel alloy, the stainless steel.
4. energy-storing device with low internal resistance according to claim 1 is characterized in that: described cover plate is provided with rupture pressure disc or explosion-proof valve.
5. energy-storing device with low internal resistance according to claim 1 is characterized in that: the material of described anti-rotation support is plastics or rubber.
6. energy-storing device with low internal resistance according to claim 1 is characterized in that: the riveted holes on the said brace is 1 or a plurality of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102106214A CN101887959B (en) | 2010-06-24 | 2010-06-24 | Riveted low-internal-resistance energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102106214A CN101887959B (en) | 2010-06-24 | 2010-06-24 | Riveted low-internal-resistance energy storage device |
Publications (2)
| Publication Number | Publication Date |
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| CN101887959A CN101887959A (en) | 2010-11-17 |
| CN101887959B true CN101887959B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102106214A Active CN101887959B (en) | 2010-06-24 | 2010-06-24 | Riveted low-internal-resistance energy storage device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420303A (en) * | 2011-12-02 | 2012-04-18 | 苏州冠硕新能源有限公司 | Battery assembly |
| CN102437308B (en) * | 2011-12-02 | 2013-07-03 | 苏州冠硕新能源有限公司 | Lithium battery |
| CN109860496A (en) * | 2018-12-18 | 2019-06-07 | 江苏塔菲尔新能源科技股份有限公司 | A kind of welding method and device of battery pole ear |
| CN109768207A (en) * | 2019-03-08 | 2019-05-17 | 力容新能源技术（天津）有限公司 | A kind of energy storage device flexible connecting structure suitable for high current charge-discharge |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635342A (en) * | 2009-08-18 | 2010-01-27 | 长春锂源新能源科技有限公司 | Method for fastening connection between pole lug and pole post of lithium ion power battery |
| CN101814592A (en) * | 2010-03-12 | 2010-08-25 | 珠海锂源动力投资有限公司 | Method for connecting polar lug and polar column of lithium ion battery |
| CN201853760U (en) * | 2010-06-24 | 2011-06-01 | 朝阳立塬新能源有限公司 | Riveted low internal resistance energy-saving device |
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