As far as I know, very few.
But they do exist.
For example, the character “砼” refers to concrete.
It consists of the parts “人” (person), “工” (work), and “石” (stone), symbolizing “man-made stone.”
Another example is “瓩,” which combines the number 千 (1000) and 瓦(watt), clearly meaning “kilowatt.”
There’s also “猹,” a small animal similar to a badger.
In fact, this character didn’t originally exist in Chinese—it was coined by Lu Xun.
But because of his towering status in the history of Chinese literature, it was exceptionally added to the list of officially recognized Chinese characters.