CN101710627A - Cathode capacitive lead-acid accumulator - Google Patents
Cathode capacitive lead-acid accumulator Download PDFInfo
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- CN101710627A CN101710627A CN200910221354A CN200910221354A CN101710627A CN 101710627 A CN101710627 A CN 101710627A CN 200910221354 A CN200910221354 A CN 200910221354A CN 200910221354 A CN200910221354 A CN 200910221354A CN 101710627 A CN101710627 A CN 101710627A
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- porous carbon
- negative plate
- capacitive lead
- lead
- acid accumulator
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a cathode capacitive lead-acid accumulator which comprises positive plates and negative plates which are arranged at intervals. The cathode capacitive lead-acid accumulator is characterized in that a porous carbon compound sand blasting layer is sprayed on active substance surfaces on the negative plates, and the porous carbon compound sand blasting layers comprise the following components in percent by weight: 45-75 percent of porous carbon material, 5-15 percent of carboxymethylcellulose, 5-15 percent of acetylene black, 6-15 percent of graphite and 6-18 percent of polytetrafluoroethylene; a mixture of the components is prepared into granules and sprayed and pressed on the wet negative plate active substance surfaces; and then the surfaces are dried and solidified. Based on a super capacitor interface electrochemical double electrode layer theory, the porous carbon material having the characteristic of electrochemical double electrode layer energy storage is led onto the negative plates, and electrochemical double electrode layer energy storage can be formed on a two-phase interface of an electrolyte/electrode material so as to ensure that the negative plates have the property of super capacitors, thus the cathode capacitive lead-acid accumulator also has the characteristic of capacitor energy storage. Meanwhile, the cathode capacitive lead-acid accumulator has the characteristics of high specific power and high-speed heavy-current discharge.
Description
Technical field
The present invention relates to a kind of cathode capacitive lead-acid accumulator.
Background technology
Day by day nervous in oil equal energy source resource, today that air environmental pollution is on the rise, this light and fast of electric bicycle, pollution-free, the vehicles that use cost is low, more and more universal.Storage battery is the most key parts of electric motor car, is the energy of electric motor car, current widely used be lead acid accumulator, account for more than 95% of market part.Lead acid accumulator is because of characteristics are subjected to consumers in general's such as aboundresources, cheap and security performance be good approval.
But lead acid accumulator is compared with battery systems such as ni-MH battery and lithium batteries as the electrical source of power of electric motor car, exists volumetric specific energy low; Gravimetric specific energy is low; Shortcomings such as useful life is short.And existing lead acid accumulator is low specific power product, can not carry out big electric current fast charging and discharging, in actual use, as starting, quickening, going up a slope, waiting against the wind the need heavy-current discharge, thisly force the operating position that storage battery moment provides heavy-current discharge, particularly the impact of negative plate is very big to battery pole plates.When lead acid accumulator uses in heavy load, capacity often is subject to negative pole, when high current density discharges, a large amount of lead ions changes electrolyte on the interior negative pole of short time, have little time to form new nucleus this moment, lead ion has only to produce and does not have to consume, degree of supersaturation is bigger in the solution, discharge than low current density, it is more to form quantity easily, the nucleus that size is less causes negative pole stable passivation in various degree thereby generate fine and close sulfuric acid lead layer, though the swelling agent that adds on the negative plate has the effect of depassivation, but circulation along with battery, these swelling agents are oxidized gradually and degraded with the oxygen cycle process of inside battery, and this moment, discharge current density was big more, easy more generation passivation, and making the negativity active material lose discharge capability gradually, shorten useful life.Simultaneously, because belonging to big electric current degree of depth charge and discharge cycles, uses electric vehicle power sources, as the lead acid accumulator of electrical source of power when beginning to discharge, generate granule lead sulfate crystal at first, along with going deep into of discharge, when forming new granule crystal, original small crystals is grown gradually and is become big, because the solubility of lead sulfate in weak solution is bigger, its speed of growth is than big in concentrated solution, the formation of lead sulfate need consume sulfuric acid, and the sulfuric acid concentration in the battery will descend gradually along with the carrying out of discharge, the discharge later stage, can directly generate bulky grain lead sulfate crystal, therefore, the battery discharge degree of depth is dark more, and the bulky grain lead sulfate crystal of generation is many more.When charging, because bulky grain lead sulfate crystal is than the difficult reduction of granule lead sulfate crystal, so carrying out along with the deep discharge circulation, irreducible bulky grain lead sulfate crystal is accumulation gradually on negative plate, after this bulky grain lead sulfate crystal runs up to a certain degree, to produce irreversible sulfation on the negative plate, capacity obviously descends, thus battery end of life.
Summary of the invention
The present invention seeks to: for overcoming the above-mentioned deficiency of existing lead acid accumulator, but and a kind of cathode capacitive lead-acid accumulator that capacitance energy storage characteristics, high-specific-power rapid large-current discharge and recharge that possesses is provided, have long useful life.
Technical scheme of the present invention is: a kind of cathode capacitive lead-acid accumulator, comprise spaced apart positive plate and negative plate, it is characterized in that the active material surface spray on the described negative plate is pressed with the compound layer that sandblasts of one deck porous carbon, the compound layer that sandblasts of this porous carbon is to be with weight percentages of components: the mixture of porous carbon materials 45～75%, carboxymethyl cellulose 5～15%, acetylene black 5～15%, graphite 6～15%, polytetrafluoroethylene 6～18% is made the graininess spray and is pressed in behind the moistening positive and negative pole active matter surface drying again, solidifies and make.
Porous carbon described in the present invention is compound, and the layer that sandblasts further is to be with weight percentages of components: the mixture of porous carbon materials 50～70%, carboxymethyl cellulose 8～12%, acetylene black 8～12%, graphite 6～12%, polytetrafluoroethylene 8～14% is made the graininess spray and is pressed in behind the moistening positive and negative pole active matter surface drying again, solidifies and make.
The compound layer preferred scheme that sandblast of porous carbon described in the present invention is to be with weight percentages of components: the mixture of porous carbon materials 60%, carboxymethyl cellulose 10%, acetylene black 10%, graphite 8%, polytetrafluoroethylene 12% is made graininess spray and is pressed in behind the moistening positive and negative pole active matter surface drying again, solidifies and make.
The total weight of the mixture of porous carbon materials described in the present invention, carboxymethyl cellulose, acetylene black, graphite and polytetrafluoroethylene accounts for 0.001～0.05% of plumbous weight in the negative plate lead paste formula.And be known technology as for the lead paste formula of negative plate, the present invention all with reference to prior art, and does not do any qualification to its component and proportioning.
Porous carbon materials described in the present invention adopts the material with carbon element can form the interfacial electric double layer energy storage, a kind of as in activated carbon powder, carbon fiber, the CNT (carbon nano-tube), and its electrochemical capacitor should be greater than 100F/g.
Preferred 20～50 ℃ of the temperature of drying described in the present invention, relative humidity 50%～100%, the time of oven dry then is 1～12 hour.
The mixture of porous carbon materials described in the present invention, carboxymethyl cellulose, acetylene black, graphite and polytetrafluoroethylene adopts conventional granulating process to make particle, and guarantees that grain graininess is greater than 100 orders.
Porous carbon described in the present invention is compound sandblast layer should be in the coverage rate that sandblasts on positive and negative pole active matter surface greater than 60%.
The present invention is based on the principle of ultracapacitor interfacial electrochemistry electric double layer, on negative plate, introduced porous carbon materials with electrochemical double-layer energy storage characteristic, can on electrolyte/electrode material two-phase interface, form the electrochemical double-layer storing energy, make negative plate have the performance of super capacitor, make battery have the characteristics of capacitance energy storage concurrently with this, possess high-specific-power simultaneously, but the characteristic that rapid large-current discharges and recharges.
Because the contribution of the capacitance energy storage on the cell negative plate, electric charge and fast Absorption electric charge can be provided fast, make and to have fallen with the electric current on the cell negative plate that load current equates, reduced the passivation phenomenon on negative plate surface, correspondingly reduced simultaneously the depth of discharge of battery, delay the accumulation process of difficult reproducibility bulky grain lead sulfate crystal on negative plate, thereby prolonged the useful life of battery.
Advantage of the present invention is:
1, the present invention is based on the principle of ultracapacitor interfacial electrochemistry electric double layer, on negative plate, introduced porous carbon materials with electrochemical double-layer energy storage characteristic, can on electrolyte/electrode material two-phase interface, form the electrochemical double-layer storing energy, make negative plate have the performance of super capacitor, make battery have the characteristics of capacitance energy storage concurrently with this, possess high-specific-power simultaneously, but the characteristic that rapid large-current discharges and recharges.
2, because the contribution of the capacitance energy storage on the negative plate, when the big electric current of load moment needs, or battery charge is when excessive, the present invention can provide electric charge and fast Absorption electric charge fast, make and to have fallen with the electric current that load or outer circuit power on the cell negative plate that equates of stream, avoid negative plate to be subjected to the impact of big electric current, significantly reduced the passivation phenomenon on negative plate surface.
3, because the part of the load current that should be provided by battery energy storage has been provided for the capacitance energy storage of negative plate, thereby the depth of discharge of negative plate reduces, delay the accumulation process of difficult reproducibility bulky grain lead sulfate crystal on negative plate, thereby prolonged the useful life of battery.
4, after the present invention is used for motor vehicle, because it has the characteristic that super capacitor energy-storage power is big, the response time is fast concurrently, so but, improved traveling security greatly in motor vehicle starting, acceleration, rapid large-current discharge when going up a slope.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is a structural representation of the present invention;
Wherein: 1, positive plate; 2, negative plate; 3, the compound layer that sandblasts of porous carbon.
Embodiment
Embodiment: in conjunction with shown in Figure 1, this cathode capacitive lead-acid accumulator that present embodiment provides comprises spaced apart positive plate 1 and negative plate 2, and the active material surface spray on the wherein said negative plate 2 is pressed with the compound layer 3 that sandblasts of one deck porous carbon.This porous carbon is compound, and the layer 3 that sandblasts is to be with weight percentages of components: the mixture of porous carbon materials 60%, carboxymethyl cellulose 10%, acetylene black 10%, graphite 8%, polytetrafluoroethylene 12% is made the graininess spray and is pressed in behind the moistening negative plate 2 active material surfaces drying again, solidifies and make; And described mixture total weight amount accounts for 0.008% of plumbous weight in negative plate 2 lead paste formulas.
What porous carbon materials described in the present embodiment adopted is that specific area reaches 1500m
2/ g, electrochemical capacitor is greater than the commercialization activated carbon powder of 100F/g.
Mixture described in the present embodiment adopts conventional granulating process to make particle, and guarantees that grain graininess is greater than 100 orders.
Porous carbon described in the present embodiment is compound sandblast layer 3 in the coverage rate that sandblasts on negative plate 2 active material surfaces greater than 60%.
The temperature of drying described in the present embodiment is 45 ℃, relative humidity 75%, and the time of oven dry then is 6 o'clock.
Present embodiment is based on the principle of ultracapacitor interfacial electrochemistry electric double layer, on negative plate 2, introduced activated carbon powder with electrochemical double-layer energy storage characteristic, can on electrolyte/electrode material two-phase interface, form the electrochemical double-layer storing energy, make negative plate 2 have the performance of super capacitor, make battery have the characteristics of capacitance energy storage concurrently with this, possessed high-specific-power simultaneously, but the characteristic that rapid large-current discharges and recharges.
Because the contribution of the capacitance energy storage on the negative plate 2, when the big electric current of load moment needs, or the charging current of battery is when excessive, battery can provide electric charge and fast Absorption electric charge fast, make and to have fallen with the electric current that load or outer circuit power on the cell negative plate 2 that equates of stream, avoid negative plate 2 to be subjected to the impact of big electric current, significantly reduced the passivation phenomenon on negative plate 2 surfaces.
Because the part of the load current that should be provided by battery energy storage has been provided for the capacitance energy storage of negative plate 2, thereby the depth of discharge of negative plate 2 reduces, delay the accumulation process of difficult reproducibility bulky grain lead sulfate crystal on negative plate 2, thereby prolonged the useful life of battery.
After this cathode capacitive lead-acid accumulator of the present invention is used for motor vehicle, because it has the characteristic that super capacitor energy-storage power is big, the response time is fast concurrently, but so, improved traveling security greatly in motor vehicle starting, acceleration, rapid large-current discharge when going up a slope.
Claims (8)
1. cathode capacitive lead-acid accumulator, comprise spaced apart positive plate (1) and negative plate (2), it is characterized in that the active material surface spray on the described negative plate (2) is pressed with the compound layer (3) that sandblasts of one deck porous carbon, the compound layer (3) that sandblasts of this porous carbon is to be with weight percentages of components: the mixture of porous carbon materials 45～75%, carboxymethyl cellulose 5～15%, acetylene black 5～15%, graphite 6～15%, polytetrafluoroethylene 6～18% is made the graininess spray and is pressed in behind moistening negative plate (2) the active material surface drying again, solidifies and make.
2. cathode capacitive lead-acid accumulator according to claim 1 is characterized in that the compound layer (3) that sandblasts of described porous carbon is to be with weight percentages of components: the mixture of porous carbon materials 50～70%, carboxymethyl cellulose 8～12%, acetylene black 8～12%, graphite 6～12%, polytetrafluoroethylene 8～14% is made graininess spray and is pressed in behind moistening negative plate (2) the active material surface drying again, solidifies and make.
3. cathode capacitive lead-acid accumulator according to claim 2 is characterized in that the compound layer (3) that sandblasts of described porous carbon is to be with weight percentages of components: the mixture of porous carbon materials 60%, carboxymethyl cellulose 10%, acetylene black 10%, graphite 8%, polytetrafluoroethylene 12% is made graininess spray and is pressed in behind moistening negative plate (2) the active material surface drying again, solidifies and make.
4. according to claim 1 or 2 or 3 described cathode capacitive lead-acid accumulators, it is characterized in that described porous carbon materials is selected from a kind of in activated carbon powder, carbon fiber, the CNT (carbon nano-tube), its electrochemical capacitor is greater than 100F/g.
5. according to claim 1 or 2 or 3 described cathode capacitive lead-acid accumulators, it is characterized in that described mixture total weight amount accounts for 0.001～0.05% of plumbous weight in negative plate (2) lead paste formula.
6. according to claim 1 or 2 or 3 described cathode capacitive lead-acid accumulators, it is characterized in that preferred 20～50 ℃ of described bake out temperature, relative humidity 50%～100%, the time of oven dry then is 1～12 hour.
7. according to claim 1 or 2 or 3 described cathode capacitive lead-acid accumulators, it is characterized in that grain graininess that described mixture makes is greater than 100 orders.
8. according to claim 1 or 2 or 3 described cathode capacitive lead-acid accumulators, it is characterized in that the compound layer (3) that sandblasts of described porous carbon in the coverage rate that sandblasts on negative plate (2) active material surface greater than 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910221354A CN101710627A (en) | 2009-11-05 | 2009-11-05 | Cathode capacitive lead-acid accumulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910221354A CN101710627A (en) | 2009-11-05 | 2009-11-05 | Cathode capacitive lead-acid accumulator |
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| CN101710627A true CN101710627A (en) | 2010-05-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931379A (en) * | 2012-10-31 | 2013-02-13 | 苏州大学 | Enhanced positive plate of power lead-acid storage battery |
| CN102945959A (en) * | 2012-11-28 | 2013-02-27 | 深圳市雄韬电源科技股份有限公司 | Activated carbon paste and method for manufacturing pole plate by activated carbon paste |
| CN104659425A (en) * | 2013-11-25 | 2015-05-27 | 天津蓝天电源公司 | Method for preparing composite coating negative plate lead-acid storage battery |
-
2009
- 2009-11-05 CN CN200910221354A patent/CN101710627A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931379A (en) * | 2012-10-31 | 2013-02-13 | 苏州大学 | Enhanced positive plate of power lead-acid storage battery |
| CN102931379B (en) * | 2012-10-31 | 2015-08-26 | 苏州大学 | Enhancement mode positive plate of power lead-acid storage battery |
| CN102945959A (en) * | 2012-11-28 | 2013-02-27 | 深圳市雄韬电源科技股份有限公司 | Activated carbon paste and method for manufacturing pole plate by activated carbon paste |
| CN104659425A (en) * | 2013-11-25 | 2015-05-27 | 天津蓝天电源公司 | Method for preparing composite coating negative plate lead-acid storage battery |
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Open date: 20100519 |