Electric protection circuit

An electric protection circuit, comprising:

• a battery pack, a main positive switch, a load device and a main negative switch connected in series, wherein
• the main positive switch and/or the main negative switch comprise at least one semiconductor switch;
• and
• the main positive switch and/or the main negative switch in the electric protection circuit are connected in parallel to a protection module, wherein
• the protection module is configured to absorb electric energy across two terminals of the main positive switch and/or the main negative switch when the main positive switch and/or the main negative switch are turned off;
• and
• the protection module comprises a first protection module connected in parallel to the main positive switch, and the first protection module comprises:
• a first energy storage unit, wherein one terminal of the first energy storage unit is connected to a first terminal of the main positive switch, the other terminal of the first energy storage unit is connected to one terminal of a first slow charging branch and one terminal of a first fast charging branch, and the first energy storage unit is configured to store the electric energy across the two terminals of the main positive switch;
• the first slow charging branch, the other terminal of the first slow charging branch is connected to a second terminal of the main positive switch, the first slow charging branch is configured to transmit the electric energy across the two terminals of the main positive switch to the first energy storage unit, and transmit electric energy released by the first energy storage unit when the main positive switch is turned on;
• and
• the first fast charging branch, wherein the other terminal of the first fast charging branch is connected to the second terminal of the main positive switch, and the first fast charging branch is configured to transmit the electric energy across the two terminals of the main positive switch to the first energy storage unit, when an electric potential difference across the first terminal of the main positive switch and the second terminal of the main positive switch is higher than or equal to a first potential difference threshold for enabling fast charging.