Samsung's battery division has increased profits sixfold in the past quarter compared to a year earlier.
The black figures of Samsung SDI, as the battery part of the company is called, came to 288.3 billion won (212.4 million euros).
That was 47.7 million won in the same period last year.
The South Korean company attributes the big difference to relatively poor results last year and high demand for batteries for electric cars in recent times.
Turnover increased by more than 30 percent to 3.3 trillion won.
The expectations for the second half of the year are also favourable.
In particular, Samsung points to the high demand for energy storage systems in the US and the popularity of batteries for electric cars and electric bicycles in Europe.
BMW, Renault and Volkswagen, among others, use battery packs from Samsung SDI.