BATTERY CHARGING AND DISCHARGING CIRCUIT

The embodiment of the invention discloses a battery charging and discharging circuit, comprising: a battery module (), configured to receive charging voltage or release discharging voltage; a transformer circuit (), connected with the battery module (), the transformer circuit () is configured to convert a first charging voltage into a charging voltage or convert a discharging voltage into a first discharging voltage; a buck-boost circuit (), connected with the transformer circuit (), the buck-boost circuit () is configured to convert a second charging voltage into the first charging voltage or convert the first discharging voltage into a second discharging voltage; a power grid end or user end (), connected with the buck-boost circuit (), the power grid end or user end () is configured to generate the second charging voltage or receive the second discharging voltage.