CN201576714U - Low-inner resistance power-storing device - Google Patents
Low-inner resistance power-storing device Download PDFInfo
- Publication number
- CN201576714U CN201576714U CN2009202494710U CN200920249471U CN201576714U CN 201576714 U CN201576714 U CN 201576714U CN 2009202494710 U CN2009202494710 U CN 2009202494710U CN 200920249471 U CN200920249471 U CN 200920249471U CN 201576714 U CN201576714 U CN 201576714U
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- storing device
- 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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- 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
- Y02E60/13—Energy storage using capacitors
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Abstract
The utility model provides a low-inner resistance power-storing device. When manufacturing pole pieces of the power-storing device, current collectors leave a certain blank edge; a core package consists of a positive pole piece, a negative pole piece and a diaphragm; the current collectors of the positive pole and the negative pole are respectively extended out of two ends of the core package; the current collectors of the positive pole and the negative pole of the core package of the power-storing device are respectively welded on a positive pole end plate and a negative pole end plate with outgoing terminals by means of wall-transmission weld; and the power-storing device adapted to the technical structure comprises a power-storing apparatus by means of the electrochemistry principle and a power-storing apparatus by means of the physical principle, such as a lithium ion battery, a super capacitor, a capacitance battery, a large-power battery and the like. The power-storing device can greatly reduce the outgoing resistance of a pole ear thereof, improves the power performance thereof, does not use a transition pole ear, further improves the use ratio of inner space thereof, and improves the bulk power intensity and the bulk energy intensity thereof. Furthermore, compared with the riveting and the pressure welding, the laser welding is good for improving the reliability of the power-storing device.
Description
Technical field
The utility model relates to a kind of energy storage device and makes the field, is specifically related to a kind of energy-storing device with low internal resistance.
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, though some improvement are also arranged, but make little progress, as: (1) is welded on the mode of lug with ultrasonic wave or thorn riveting on the both positive and negative polarity collector, again lug is welded on the metal connecting sheet of end plate, this connected mode welding times is many, needs to reserve lug and brace space at device inside; (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 to the accuracy of manufacture of jump ring, and easily causes loose contact; (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.
The utility model content
The purpose of this utility model is: at the deficiency that prior art exists, provide a kind of energy-storing device with low internal resistance on electrode lead-out process, thereby the internal resistance of energy storage device is reduced, volume reduces, volumetric power density improves, volume energy density improves.
The utility model proposes a kind of new electrode pole ear leading-out, this structure is very beneficial for reducing the internal resistance of energy storage device, improves its power-performance.Promptly adopt the mode of the saturating wall welding of laser directly the both positive and negative polarity collector of energy storage device to be welded on respectively on the both positive and negative polarity end plate, this method is very beneficial for reducing the internal resistance of energy storage device, improves its power-performance.The utility model is taked following technical scheme for achieving the above object:
A kind of energy-storing device with low internal resistance, comprise device shell, place core bag and positive and negative electrode end plate in the housing, it is characterized in that: the core bag is made up of the anode pole piece that has plus plate current-collecting body, barrier film and the cathode pole piece that has a negative current collector, collector when the positive and negative plate of energy storage device is made leaves the lay edges edge at least on one side, the positive and negative electrode collector stretches out from core bag two ends respectively, and this both positive and negative polarity collector is welded on respectively on the both positive and negative polarity end plate; 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 energy storage device that the utility model 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.
One of them is provided with the liquid injection hole of the electrolyte that is used to annotate at least on the both positive and negative polarity end plate described in the utility model; The both positive and negative polarity end plate is provided with the metal connection post with its one, and binding post can adopt a kind of in screw bolt-type binding post, riveted joint type binding post, the solder type binding post; The both positive and negative polarity collector is respectively with metal material and adopt the saturating wall welding procedure of laser to be welded on to have the both positive and negative polarity end plate inner face of drawing binding post, end plate and core bag collector weld can be provided with the less welding groove of thickness, to help implementing the saturating wall welding of laser.One of them end plate in the both positive and negative polarity end plate can be fabricated to one with the energy storage device shell; The outer of another end plate is provided with insulating material; This insulating material can be a kind of in rubber, the plastics or their composite material.Can also place the plastics or the rubber insulation material of annular in the end of core bag, to prevent the short circuit of core bag both positive and negative polarity; Core bag project organization is cylindrical or cuboid.
Characteristics of the present utility model are: owing to adopt the mode of the saturating wall welding of laser directly the both positive and negative polarity collector of energy storage device to be welded on respectively on the both positive and negative polarity end plate, therefore without the transition lug, can reduce the resistance of drawing of energy storage device lug significantly, improve its power-performance; Further improved the utilance of energy storage device inner space, thereby the internal resistance of energy storage device has been reduced, volume reduces, made the volumetric power density of energy storage device, volume energy density higher; Volumetric power density improves, volume energy density is higher.Compare with crimping with riveted joint, the laser welding solder joint is many, welding is reliable, helps further improving the reliability of device.
Description of drawings
Fig. 1 leaves the current collector structure schematic diagram on lay edges edge for the utility model both sides.
Fig. 2 is not for being coated with the current collector structure schematic diagram that electrode material leaves the lay edges edge on one side.
Fig. 3 is a core bag generalized section.
Fig. 4 is an energy storage device housing schematic diagram.
Fig. 5 is the end plate vertical view.
Fig. 6 is the end plate longitudinal section.
Fig. 7 is the whole generalized section of the utility model device.
Embodiment
Also in conjunction with the accompanying drawings the utility model is elaborated below by embodiment, provides Comparative Examples that effect of the present utility model is described simultaneously.The following examples just meet the example of the utility model technology contents, do not illustrate that the utility model 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 the utility model claim item manufacturing.
Embodiment 1:
1. anode sizing agent preparation (by weight): with business-like lithium ion battery LiMn2O4 95%, conductive black 2%, commercial li-ion battery binding agent L135 (3%) and total amount are the water of 5 times of above-mentioned solid-like total amounts, mix to form uniform slurry in 8 hours in the vacuum planetary mixer.
2. cathode size preparation (by weight): with commercialization lithium ion battery Delanium 91%, conductive black 2%, binding agent SBR (5%), CMC (2%) and total amount are the deionized water of 3.8 times of above-mentioned solid-like total amounts, mix to form uniform slurry in 8 hours in the vacuum planetary mixer.
3. slurry coating: with coating machine be coated in the above-mentioned anode sizing agent for preparing on the aluminum foil current collector equably respectively, cathode size is coated on the Copper Foil collector, and makes collector 1 both sides leave the lay edges of 10mm respectively along 12, as shown in Figure 1.
4. pole piece is rolling: use to coat to roller mill that the positive and negative electrode sheet of electrode material 2 is respectively rolling to be more closely knit pole piece, with further increase bond strength, reduce resistance.
5. pole piece is cut: with cutting machine will go up the step rolling good pole piece cut into suitable size, Yi Bian and make collector 1 remain with lay edges along 12, be not coated with electrode material Yi Bian promptly leave certain width, as shown in Figure 2 at collector 1.
6. reel core bag, dress shell: pole piece is wound into cylindrical core bag 10 with commercial li-ion battery diaphragm 3, and anodal collector 1a, the collector 1b of negative pole are stretched out to core bag two ends respectively, its core bag section as shown in Figure 3; Core bag 10 is put into the shell 4 that designs, the structure of shell as shown in Figure 4, shell 4 is fixed as one with bottom plate 7; Again upper head plate 6 (as Fig. 5, shown in Figure 6) is covered, the outer of upper head plate is provided with insulating material 8, the inner face of upper and lower end plate (6,7) is contacted well with the collector (1a, 1b) of the both positive and negative polarity at core bag 10 two ends, and upper head plate 6 is enclosed on the shell 4 with revolving the envelope machine;
7. welding: the both positive and negative polarity end plate is provided with and its all-in-one-piece metal connection post 5, both positive and negative polarity collector (1a, 1b) is welded on respectively and has on the both positive and negative polarity end plate of drawing binding post 5, the collector that method is to use laser-beam welding machine 11 to adopt saturating wall welding procedure from the outside of end plate core bag two ends to be stretched out is welded on the end plate inner face, as shown in Figure 7.
8. dry: upper head plate 6 is provided with the liquid injection hole 9 of the electrolyte that is used to annotate; Before the filling electrolyte, will weld good goods earlier and put into 120 ℃ vacuum drying chamber and dried 36 hours, the moisture content in the core bag 10 is volatilized from liquid injection hole 9.
9. annotate electrolyte: under vacuum condition, to dry good goods, inject the commercial electrolyte of lithium ion battery, after electrolyte is annotated, the liquid injection hole on the shell is temporarily sealed up with adhesive tape from the liquid injection hole 9 of end plate.
10. seasoned, seal: the goods of fluid injection are put on the seasoned machine of battery (also claim formation device), its both positive and negative polarity links to each other with the both positive and negative polarity of seasoned machine respectively, start seasoned machine carry out seasoned, after seasoned 8 hours with the stainless steel steel ball with liquid injection hole 9 sealings.
Comparative Examples 1:
1. anode sizing agent preparation: with the 1. step of embodiment 1.
2. cathode size preparation: with the 2. step of embodiment 1.
3. slurry coating: with coating machine be coated in the above-mentioned anode sizing agent for preparing on the aluminum foil current collector equably respectively, cathode size is coated on the Copper Foil collector, and the gap coating function of utilizing coating machine makes every 830mm and just stays the wide gap of 15mm not to be coated with electrode slurry, to go on foot the welding electrode ear after an action of the bowels.
4. pole piece is rolling: with the 4. step of embodiment 1.
5. pole piece cut, lug welding: will go up rolling good pole piece of step with cutting machine and cut into suitable size, and be the lug of 10mm is connected on the pole piece coating with supersonic welding gap location with width.
6. reel the core bag, the dress shell: the pole piece that will weld lug is wound into the cylindrical core bag with the commercial li-ion battery diaphragm; The core bag is put into commercial li-ion battery cuboid stainless steel casing.
7. welding: weld together with the lug brace of supersonic welder, weld together with the end plate and the battery case of laser-beam welding machine again with battery with lug and commercial li-ion cell end plate.
8. dry: with the 8. step of embodiment 1.
9. annotate electrolyte: with the 9. step of embodiment 1.
10. seasoned, seal: with the 10. step of embodiment 1.
Claims (6)
1. energy-storing device with low internal resistance, comprise device shell, place core bag and positive and negative electrode end plate in the housing, it is characterized in that: the core bag is made up of the anode pole piece that has plus plate current-collecting body, barrier film and the cathode pole piece that has a negative current collector, collector when the positive and negative plate of energy storage device is made leaves the lay edges edge at least on one side, the positive and negative electrode collector stretches out from core bag two ends respectively, and this both positive and negative polarity collector is welded on respectively on the both positive and negative polarity end plate; 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 is characterized in that: this energy storage device has 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: one of them is provided with the liquid injection hole of the electrolyte that is used to annotate at least on the described both positive and negative polarity end plate; The both positive and negative polarity end plate is provided with the metal connection post with its one, and the both positive and negative polarity collector is welded on the inner face of both positive and negative polarity end plate respectively, and end plate and collector weld can be provided with the welding groove.
4. according to claim 1 or 3 described energy-storing device with low internal resistance, its feature also is: one of them end plate in the described both positive and negative polarity end plate can be fabricated to one with the energy storage device shell; Another end plate outer is provided with insulating material; Can also place the insulating material of annular in the end of core bag.
5. energy-storing device with low internal resistance according to claim 1 is characterized in that: described core bag is cylindrical or cuboid.
6. energy-storing device with low internal resistance according to claim 3 is characterized in that: what described binding post can be in screw bolt-type binding post, riveted joint type binding post, the solder type binding post is a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202494710U CN201576714U (en) | 2009-11-24 | 2009-11-24 | Low-inner resistance power-storing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202494710U CN201576714U (en) | 2009-11-24 | 2009-11-24 | Low-inner resistance power-storing device |
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| Publication Number | Publication Date |
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| CN201576714U true CN201576714U (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202494710U Expired - Fee Related CN201576714U (en) | 2009-11-24 | 2009-11-24 | Low-inner resistance power-storing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074360A (en) * | 2010-12-20 | 2011-05-25 | 天津力神电池股份有限公司 | Cylindrical supercapacitor |
| CN102074359A (en) * | 2010-12-20 | 2011-05-25 | 天津力神电池股份有限公司 | Circular supercapacitor |
| CN103199213A (en) * | 2013-03-19 | 2013-07-10 | 深圳市沃特玛电池有限公司 | Pole piece of lithium ion battery, manufacturing method for pole piece, and lithium ion battery |
| CN107946534A (en) * | 2017-11-22 | 2018-04-20 | 安徽省大富光电科技有限公司 | A kind of lithium battery electrode leading of high charge-discharge magnification |
-
2009
- 2009-11-24 CN CN2009202494710U patent/CN201576714U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074360A (en) * | 2010-12-20 | 2011-05-25 | 天津力神电池股份有限公司 | Cylindrical supercapacitor |
| CN102074359A (en) * | 2010-12-20 | 2011-05-25 | 天津力神电池股份有限公司 | Circular supercapacitor |
| CN103199213A (en) * | 2013-03-19 | 2013-07-10 | 深圳市沃特玛电池有限公司 | Pole piece of lithium ion battery, manufacturing method for pole piece, and lithium ion battery |
| CN103199213B (en) * | 2013-03-19 | 2017-08-08 | 深圳市沃特玛电池有限公司 | Electrodes of lithium-ion batteries, pole piece manufacture method and lithium ion battery |
| CN107946534A (en) * | 2017-11-22 | 2018-04-20 | 安徽省大富光电科技有限公司 | A kind of lithium battery electrode leading of high charge-discharge magnification |
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| Date | Code | Title | Description |
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| 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: 20100908 Termination date: 20151124 |