CN203071168U - High intensity positive pole piece for lead-acid battery - Google Patents
High intensity positive pole piece for lead-acid battery Download PDFInfo
- Publication number
- CN203071168U CN203071168U CN2012206323328U CN201220632332U CN203071168U CN 203071168 U CN203071168 U CN 203071168U CN 2012206323328 U CN2012206323328 U CN 2012206323328U CN 201220632332 U CN201220632332 U CN 201220632332U CN 203071168 U CN203071168 U CN 203071168U
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- positive pole
- lead
- pole piece
- battery
- carbon fiber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a high intensity positive pole piece for a lead-acid battery. The high intensity positive pole piece comprises a positive pole piece gate and an active substance layer which is coated on the surface of the positive pole piece gate and made by mixing a short carbon fiber reinforcing material into lead dioxide. According to the high intensity positive pole piece disclosed by the utility model, as a short carbon fiber material is mixed into positive pole active substances and has higher specific strength and specific modulus, in the charging and discharging process of the battery, each component of the carbon fiber does not participate in electrochemical reaction of the battery to enable the positive pole piece to have high intensity, high bearing capacity and stronger creep resistance, thus greatly improving the binding force among the active substances and the binding force among the active substances and compartments of the positive pole piece gate, enabling the active substances to be softened and drop difficultly and prolonging the service life of the lead-acid battery.
Description
Technical field
The utility model relates to the battery technology field, relates in particular to a kind of lead acid accumulator high strength positive plate.
Background technology
The energy is the basis of modern social development, be modern people depend on for existence essential.Day by day pay close attention to today of environmental protection and green energy resource people, this light and fast of electric motor car, pollution-free, the vehicles that use cost is low, more and more universal.Providing the equipment of electric energy to electric motor car is storage battery, and namely storage battery is the energy of electric motor car.At present, the storage battery that is applied in the electric motor car mostly is lead acid accumulator (accounting for more than 95% of the market share), and this has benefited from lead acid accumulator and has multiple advantages such as aboundresources, cheap and security performance be good.
But, battery systems such as relative ni-MH battery or lithium battery, described lead acid accumulator has short shortcoming in useful life again, thereby causes the many problems of resource loss.Studies show that according to multinomial, cause short one of the main reasons of electric vehicle power lead acid battery life-span to be: the active material on the anode plate for lead acid accumulator (being generally brown lead oxide) is softening, and then make the positive active material brown lead oxide be shed in the electrolyte, form short circuit at inside battery, thereby make battery lose capacity, cause battery failure.
And cause positive material, the reason that comes off is closely-related with service condition as this lead-acid battery of electric motor car power.The behaviour in service of power-type lead-acid battery is heavy load, dark circulation, under this service condition, the positive active material of battery is behind repeatedly dark charging and deep discharge, between the active material and the combination between active material and the grid weaken, and battery recycles deeply, the charging interval is long, the oxygen of analysing that exists when positive active material is subjected to charging impacts serious, active material density descends, and last softening and shedding causes battery failure.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of lead acid accumulator high strength positive plate, and this positive plate can effectively improve the useful life of power lead acid battery.
For achieving the above object, the utility model provides following technical scheme:
A kind of lead acid accumulator high strength positive plate, this positive plate comprises: anode plate grid and the brown lead oxide/chopped carbon fiber active material layer that is coated on described anode plate grid surface; Wherein, described brown lead oxide/chopped carbon fiber active material layer is made by sneaking into the chopped carbon fiber reinforcing material in the brown lead oxide.
Preferably, in the above-mentioned lead acid accumulator high strength positive plate, described anode plate grid is electrolytic lead.
Preferably, in the above-mentioned lead acid accumulator high strength positive plate, the total weight of described chopped carbon fiber reinforcing material accounts for 0.0001～0.09% of the plumbous weight of active material layer.
Preferably, in the above-mentioned lead acid accumulator high strength positive plate, the component of described chopped carbon fiber reinforcing material comprises: charcoal fiber, graphite fibre and dispersant.
Further, in the above-mentioned lead acid accumulator high strength positive plate, the specific strength of described charcoal fiber and graphite fibre is 2000MPa, and specific modulus is 250GPa, and length is 2～6mm.
Preferably, in the above-mentioned lead acid accumulator high strength positive plate, described dispersant is one or more in methylcellulose, sodium carboxymethylcellulose and the hydroxyethylcellulose.
Preferably, in the above-mentioned lead acid accumulator high strength positive plate, the weight percentages of components of described chopped carbon fiber reinforcing material is: charcoal fiber 5～70%, graphite fibre 5～70%, dispersant 1～45%.
Further, in the above-mentioned lead acid accumulator high strength positive plate, the weight percentages of components of described chopped carbon fiber reinforcing material is: charcoal fiber 15～55%, graphite fibre 20～60%, dispersant 5～35%.
Especially, in the above-mentioned lead acid accumulator high strength positive plate, the weight percentages of components of described carbon fibre reinforcement is: charcoal fiber 35%, graphite fibre 40%, dispersant 25%.
From technique scheme as can be seen, lead acid accumulator high strength positive plate provided by the utility model, owing to added in its positive active material and had higher specific strength and the carbon fibre reinforcement of specific modulus, made positive plate has high strength and high-strength bearing capacity, thereby has strengthened structural strength and the dimensional stability of positive plate; And because each component of carbon fiber in the positive active material does not participate in the electrochemical reaction of battery, therefore, carrying out along with battery charging and discharging, the structural strength of described positive plate is still constant, thereby improved the creep resisting ability of described positive plate greatly, improved between the active material and active material and the little lattice of anode plate grid between adhesion, make that described active material is difficult for softening, coming off, and then improved the useful life of lead acid accumulator.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing relevant of the present utility model in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of lead acid accumulator high strength positive plate of providing of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is described in detail, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work belongs to the scope that the utility model is protected.
The positive active material of lead acid accumulator be by
And β-PbO
2These two kinds of brown lead oxide crystal formations are formed, wherein
Have mechanical strength and bigger size preferably, by
Formed polycrystalline network can be used as the bone of active material, plays network and bone effect in positive active material, and it is complete that the structure of positive active material is able to, and makes electrode have the long life-span.And β-PbO
2Have less size and bigger specific area, electro-chemical activity is better than
, can provide big specific capacity, be the main provider of electrode capacity, so anodal activity and life-span are subjected to
And β-PbO
2The influence of each accounting example in brown lead oxide.In the acidic electrolysis bath of lead-acid battery, along with the carrying out of circulation
And β-PbO
2Relative amount can change because in the stronger solution of acidity, during battery discharge
Generate PbSO
4, discharging product PbSO
4Be oxidized to β-PbO during charging
2So, in the circulation of battery charging and discharging,
Can gradate and be β-PbO
2This conversion can raise gradually in the initial stage battery capacity of battery circulation, but along with deeply carrying out of discharging and recharging, in the positive electrode material
Relative scale more and more littler, thereby network is weakened and is destroyed, the structural strength of positive active material dies down, adhesion between the active material weakens gradually, and in the process of battery charge, analyse under the impact of oxygen, the density of whole positive active material descends, and finally causes positive material and comes off battery end of life.
In addition, heavy load, the lead-acid battery that recycles deeply, the corrosion of its anode plate grid is serious than other parts, and anode plate grid can deform when being corroded, and the size of grid is linear to be increased.End product PbO because of corrosion
2Molecular volume be approximately 1.4 times of plumbous volume, add corrosion product PbO
2Film has certain hole, the volume ratio lead alloy volume of corrosion product is much bigger like this, the grid metal is under the stress state, and creep takes place in grid gradually and linearity is grown up, and also is a key factor that causes the easy softening and shedding of battery positive electrode active material.During battery discharge, positive active material PbO
2Be converted into PbSO
4, because PbSO
4Specific volume compare PbO
2Greatly, thus whole positive plate material volume to increase, if hold the grid sub-box constancy of volume of active material, then PbSO
4Formation the porosity of pole plate is reduced, apparent volume can not change.But when the grid distortion was grown up, the volume of whole positive pole also can increase, anodal expansion, PbSO when battery charge
4Be converted into PbO again
2, porosity increases along with the increase of cycle-index like this, serious expansion has taken place in positive pole, porosity too increases, adhesion between the active material particle reduces, electrically contact destroyed, battery failure.
And cause positive material, the reason that comes off is closely-related with service condition as this lead-acid battery of electric motor car power.The behaviour in service of power-type lead-acid battery is heavy load, dark circulation, under this service condition, the positive active material of battery is behind repeatedly dark charging and deep discharge, between the active material and the combination between active material and the grid weaken, and battery recycles deeply, the charging interval is long, the oxygen of analysing that exists when positive active material is subjected to charging impacts serious, active material density descends, and last softening and shedding causes battery failure.
Therefore, in order to improve the useful life of power lead acid battery, problem demanding prompt solution is: the intensity and the creep resisting ability that improve positive plate.
The inventor discovers: carbon fiber also has quite high specific strength and specific modulus except the various premium properties with general material with carbon element, the mechanical property excellence; Insoluble bloated in organic solvent, acid, alkali, corrosion resistance is transcendent, and therefore, carbon fiber is the reinforcing material of a new generation.Described carbon fiber is added into as reinforcing material in the materials such as resin, metal, pottery, and the polymer composite of formation, metal-base composites, ceramic matric composite etc. also all have excellent strengthening the property.For example: the tensile strength of carbon fiber-reinforced resin composite materials can reach more than the 3500Mpa, is 7～9 times of steel, and tensile modulus of elasticity is 23000～43000Mpa, also is higher than steel.
Described carbon fiber has polytype again according to different purposes, and for example: phosphorus content is higher than 99% graphite fibre and has electric conductivity preferably; The charcoal fiber has higher specific strength and specific modulus, can be used as enhancing substance and is added in the different metal or nonmetallic materials, improves the intensity of these materials.
Based on this, the utility model provides a kind of lead acid accumulator high strength positive plate, with reference to figure 1, the structural representation of a kind of lead acid accumulator high strength positive plate that Fig. 1 provides for the utility model embodiment, this positive plate comprises: anode plate grid 1 and be coated on the active material layer 2 on described anode plate grid 1 surface; Wherein, described active material layer 2 is made by sneaking into the chopped carbon fiber reinforcing material in the brown lead oxide; Wherein, described anode plate grid 1 material is electrolytic lead.
The component of the chopped carbon fiber reinforcing material described in the utility model embodiment comprises: charcoal fiber, graphite fibre and dispersant; Wherein, described dispersant is selected from one or more in methylcellulose, sodium carboxymethylcellulose and the hydroxyethylcellulose.
The concrete manufacturing process of described positive plate is: at first charcoal fiber, graphite fibre are joined and make the carbon fiber dispersant in the dispersant; Then it is joined in the anodal lead powder and evenly stir, then will evenly mix the anodal lead powder of carbon fiber dispersant and make anode diachylon (main component is brown lead oxide) by normal process and prescription, and described anode diachylon be coated in form positive plate on the anode plate grid.
Anode plate grid described in the present embodiment can or draw in the net technology by casting process and be made, and to this, there is no particular restriction for the utility model.
The weight percentages of components of described chopped carbon fiber reinforcing material can be charcoal fiber 5～70%, graphite fibre 5～70%, dispersant 1～45%.Preferably, the weight percentages of components of described chopped carbon fiber reinforcing material can be charcoal fiber 15～55%, graphite fibre 20～60%, dispersant 5～35%.More excellent, the weight percentages of components of described carbon fibre reinforcement is: charcoal fiber 35%, graphite fibre 40%, dispersant 25%.The total weight of described chopped carbon fiber reinforcing material accounts for 0.0001～0.09% of plumbous weight in the anode diachylon.
The specific strength of described charcoal fiber and graphite fibre is 2000MPa, and specific modulus is 250GPa, and length is 2～6mm.But both have different effects in the positive electrode active material of being made by the chopped carbon fiber reinforcing material: described charcoal fiber makes positive plate possess high ratio modulus and high specific strength, and described graphite fibre makes described positive plate keep good conductivity performance.
In the utility model, the technology of making positive plate by the anode diachylon that has mixed the chopped carbon fiber reinforcing material is with reference to prior art, and the utility model is not done any restriction.
Lead acid accumulator high strength positive plate provided by the utility model has following advantage:
1, lead acid accumulator high strength positive plate provided by the utility model, in common positive active material brown lead oxide, mixed reinforcing material carbon fiber of new generation, and make positive plate with this, thereby make described positive plate have high strength and high-strength bearing capacity, therefore, structural strength and the dimensional stability of positive plate have been strengthened greatly.
2, lead acid accumulator high strength positive plate provided by the utility model, because each component of carbon fiber that adds in the positive active material does not all participate in the electrochemical reaction of battery, so in the whole charging and discharging cyclic process of battery, the character of carbon fibre material can not change in the positive plate, thereby makes its humidification for positive plate can not weaken yet.Therefore, along with the carrying out of battery charging and discharging, the structural strength of lead acid accumulator high strength positive plate provided by the utility model is still constant.
3, lead acid accumulator high strength positive plate provided by the utility model, the positive plate of being made by carbon fibre reinforcement can keep its structural strength constant in battery charge and discharge process, therefore improved the creep resisting ability of anode plate grid greatly, delayed the process that anode plate grid is grown up, adhesion between positive plate surface lead layer active material and the little lattice of anode plate grid can be damaged, prevented coming off of positive plate surface lead layer active material and caused battery failure, thereby improved greatly the useful life of battery.
4, lead acid accumulator high strength positive plate provided by the utility model, because positive plate is to be made by the lead powder that has mixed carbon fibre reinforcement, therefore structural strength and the dimensional stability of positive plate have been strengthened greatly, reduced the chance that positive plate upper surface lead layer active material expands in charge and discharge process, improved the adhesion between the active material, make active material be difficult for taking place softening, and then slowed down greatly the positive plate surface reactive material along with the carrying out of battery charging and discharging circulation the process of softening and shedding, the useful life of further having improved battery.
To those skilled in the art, obviously the utility model is not limited to the details of above-mentioned one exemplary embodiment, and under the situation that does not deviate from spirit of the present utility model or essential characteristic, can realize the utility model with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than above-mentioned explanation, therefore is intended to include in the utility model dropping on the implication that is equal to important document of claim and all changes in the scope.Any Reference numeral in the claim should be considered as limit related claim.
In addition, be to be understood that, though this specification is described according to execution mode, but be not that each execution mode only comprises an independently technical scheme, this narrating mode of specification only is for clarity sake, those skilled in the art should make specification as a whole, and the technical scheme among each embodiment also can form other execution modes that it will be appreciated by those skilled in the art that through appropriate combination.
Claims (2)
1. a lead acid accumulator high strength positive plate is characterized in that, comprising: anode plate grid and the brown lead oxide/chopped carbon fiber active material layer that is coated on described anode plate grid surface.
2. lead acid accumulator high strength positive plate according to claim 1, it is characterized in that: described anode plate grid is electrolytic lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206323328U CN203071168U (en) | 2012-11-26 | 2012-11-26 | High intensity positive pole piece for lead-acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206323328U CN203071168U (en) | 2012-11-26 | 2012-11-26 | High intensity positive pole piece for lead-acid battery |
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| Publication Number | Publication Date |
|---|---|
| CN203071168U true CN203071168U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206323328U Expired - Fee Related CN203071168U (en) | 2012-11-26 | 2012-11-26 | High intensity positive pole piece for lead-acid battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931380A (en) * | 2012-11-26 | 2013-02-13 | 苏州大学 | Power type lead-acid storage battery positive electrode plate |
| CN109921053A (en) * | 2017-12-13 | 2019-06-21 | 中国科学院大连化学物理研究所 | A kind of preparation method and applications of bipolar plates |
| CN112103513A (en) * | 2020-09-17 | 2020-12-18 | 超威电源集团有限公司 | Positive plate and negative plate of lead-acid storage battery and manufacturing method |
-
2012
- 2012-11-26 CN CN2012206323328U patent/CN203071168U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931380A (en) * | 2012-11-26 | 2013-02-13 | 苏州大学 | Power type lead-acid storage battery positive electrode plate |
| CN102931380B (en) * | 2012-11-26 | 2015-07-15 | 苏州大学 | Power type lead-acid storage battery positive electrode plate |
| CN109921053A (en) * | 2017-12-13 | 2019-06-21 | 中国科学院大连化学物理研究所 | A kind of preparation method and applications of bipolar plates |
| CN112103513A (en) * | 2020-09-17 | 2020-12-18 | 超威电源集团有限公司 | Positive plate and negative plate of lead-acid storage battery and manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20151126 |