What is the role of carbon black added to lead-acid batteries?
Carbon black is a necessary additive in the manufacturing process of lead-acid batteries. Its role is to increase the conductivity of the lead paste, improve the battery's charging acceptance performance, and prevent negative electrode sulfate from forming.
What is the standard amount of carbon black added to lead-acid batteries?
If the amount of carbon black added to lead-acid batteries is not appropriate or if it is unevenly dispersed, it will reduce the battery's charging acceptance performance or cause negative electrode sulfate formation, resulting in decreased performance and affecting the battery's service life. In the production of battery plates, the content of carbon black in the carbon black mixture is 10%.
What are the methods of adding carbon black to lead-acid batteries?
Currently, carbon black is generally added by the dry method, which means that carbon black is directly added to lead powder and stirred to mix. This method cannot change the size of carbon black particles. If the carbon black particles are too large before adding, it will cause uneven dispersion of carbon black in the lead paste and paste process. During the addition process, not only is the carbon black being added easily sucked away by the dust removal fan, causing insufficient carbon black in the lead paste formula and unstable quality, but the dust flying around can also be harmful to the operator's health.
Due to the hydrophobic nature of carbon black, when it is dispersed in pure water or deionized water, the particle size is larger and the performance is unstable and prone to sedimentation. Using a sodium lignosulfonate water solution to disperse carbon black can use the surface activity of sodium lignosulfonate to improve the surface tension of carbon black, increase its hydrophilicity, and disperse it into smaller particles, which can prevent carbon black from aggregating or settling. When making the negative electrode plate of the battery, the carbon black mixture is added to the lead paste and mixed, thus completing the addition of carbon black to the lead-acid battery.
What is the role of carbon black in the electrode of a battery?
Adding carbon black to the battery mainly affects the negative electrode of the battery.
What kind of carbon black can be used in batteries?
Acetylene black or mixed gas black can be used in batteries. Some battery manufacturers may also use a small amount of carbon black N330 to fill. However, the requirements for using carbon black in lead-acid batteries are relatively strict, and not all carbon black can be used. Using specialized conductive carbon black for batteries is better than using carbon black N330. Of course, German Degussa carbon black can also be used in batteries, but the development of the carbon black industry in China is good enough to replace some foreign carbon black products used in the battery industry.