Which of the following statements is true of recombinant batteries?
A. They recombine oxygen.
B. They’re able to produce a higher voltage.
C. They’re vented to release gassing.
D. They recombine sulfuric acid.
The Correct Answer and Explanation is :
The correct answer is A. They recombine oxygen.
Recombinant batteries are a type of sealed lead-acid battery that use a specific chemical process to reduce maintenance and minimize the need for venting gases. These batteries are designed to recombine the oxygen produced at the positive plate during charging with the hydrogen produced at the negative plate to form water, preventing the loss of water from the electrolyte. This process is what makes these batteries low-maintenance compared to traditional flooded lead-acid batteries, which need regular topping up of water.
Here’s how the oxygen recombination works: when the battery is charged, oxygen gas is generated at the positive plate as part of the water electrolysis process. In a traditional lead-acid battery, this gas would be vented, and over time, water would need to be added to replace the lost moisture. However, in a recombinant battery, the oxygen is diffused through the battery and reacts with hydrogen gas at the negative plate to form water again. This water is returned to the electrolyte, making it unnecessary to manually add water during the battery’s lifetime.
Key advantages of recombinant batteries include reduced maintenance (since they are sealed and water loss is minimized), as well as safer operation because they don’t vent hydrogen gas during normal use. This makes them ideal for applications in environments where regular maintenance isn’t practical or where safety is a concern, such as in backup power systems, emergency lighting, and other industrial applications.
Options B (they produce higher voltage) and C (they vent gases) are incorrect because recombinant batteries do not produce higher voltage than traditional lead-acid batteries, nor do they vent gases during normal operation. Option D (they recombine sulfuric acid) is also incorrect, as the recombination process involves oxygen and hydrogen, not sulfuric acid.