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負(fù)極板硫酸鹽化對(duì)電池的影響 |
| 電池負(fù)極板硫酸鹽化就是負(fù)極上PbSO4不可逆變?yōu)?/SPAN>PbO2和Pb。難以充電復(fù)原。負(fù)極硫酸鹽化原因較多：長(zhǎng)期欠充、負(fù)極去極化、放電后未及時(shí)充電、電解液濃度太高、電解液的層化現(xiàn)象，都會(huì)引起負(fù)極硫酸鹽化。電解液層化即濃度差異，濃度過(guò)高與濃度過(guò)稀都屬于硫酸的鈍化濃度區(qū)，只有濃度適當(dāng)?shù)膮^(qū)域才有活性，本質(zhì)是降低了活性物質(zhì)的利用率。充電反應(yīng)是放電的逆反應(yīng)，由于電解液濃差，充電反應(yīng)只在合適濃度區(qū)內(nèi)進(jìn)行，大大降低了充電效率，即充電難以進(jìn)行。由此可以看到：隨著持續(xù)充／放循環(huán)與經(jīng)年浮充，就有越來(lái)越多的PbSO4沉積在電池槽底，伴隨電解液濃度增加，硫酸鉛結(jié)晶粗化，硫酸鹽化就嚴(yán)重。 The battery anode plank vitriol turns be can not go against to change into PbO2 and Pb on PbSO4 of anode.It is hard to refresh to recover.The anode vitriol turns reason more:After owing Chong and anode to turn, turn on electricity very much over a long period of time don't refresh in time, the electrolyte density is too high, the layer of electrolyte will arouse anode vitriol's turning to turn a phenomenon.The electrolyte layer turns namely density difference, density lead Gao and density over sparse all belong to the bluntness of sulfuric acid to turn density area, only density adequacy of there is just activity in district, the essence is the utilization that lowered activity material.Refresh to respond to is the adverse reaction for turning on electricity, thick bad because of electrolyte, refresh reaction carries on in the suitable density area and consumedly lowers to refresh an efficiency, then refresh hard carry on.Can see from here:Along with keep on Chong/put circulation with after one year float Chong, have more and more PbSO4s deposition at battery slot bottom, accompany with an electrolyte density to increase, the sulfuric acid lead crystallizes thick turn, the vitriol turns severity. |
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