Composite Heating System, and Heating Method and Heating Apparatus Thereof

A heating method of a composite heating system, the heating method relates to a liquid heating system, an external power source interface module, a battery pack output power source interface module and a battery acquisition module;

• the liquid heating system comprises a heat exchanger and a composite heating apparatus connected to each other by pipelines;
• the composite heating apparatus comprises a first heater and a second heater;
• the external power source interface module, the battery pack output power source interface module, the first heater and the second heater are connected by a relay group;
• the relay group comprises a plurality of relays;
• the heating method comprises the following steps:
• S1:
• acquiring a voltage data and a temperature data of each of batteries by the battery acquisition module, and acquiring an external power source connection information by the external power source interface module;
• the external power source connection information is configured to indicate whether the external power source interface module is connected to an external power source;
• S2:
• determining, when the external power source interface module is connected to the external power source, whether a battery pack temperature is lower than a first temperature threshold according to the temperature data of each of batteries, and instructing connection switching of the plurality of relays in the relay group if the battery pack temperature is lower than the first temperature threshold, such that the external power source is electrically connected to the battery pack output power source interface module by the external power source interface module, to start a charging preheating before batteries are charged;
• and
• S3:
• determining, when the external power source interface module is not connected to the external power source, whether the battery pack temperature is lower than a second temperature threshold according to the temperature data of each of batteries, and instructing connection switching of the plurality of relays in the relay group if the battery pack temperature is lower than the second temperature threshold, to start a discharging preheating;
• during the charging preheating, the external power source interface module is at least electrically connected to the first heater;
• and
• during the discharging preheating, the battery pack output power source interface module is at least electrically connected to the second heater.

A heating apparatus of a composite heating system, the heating apparatus relates to a liquid heating system, an external power source interface module, a battery pack output power source interface module and a battery acquisition module;

• the liquid heating system comprises a heat exchanger and a composite heating apparatus connected to each other by pipelines;
• the composite heating apparatus comprises a first heater and a second heater;
• the external power source interface module, the battery pack output power source interface module, the first heater and the second heater are connected by a relay group;
• the relay group comprises a plurality of relays;
• the heating apparatus comprises the following modules:
• M1, configured to acquire a voltage data and temperature data of each of batteries by the battery acquisition module, and acquire an external power source connection information by the external power source interface module;
• the external power source connection information is configured to indicate whether the external power source interface module is connected to an external power source;
• M2, configured to determine, when the external power source interface module is connected to the external power source, whether a battery pack temperature is lower than a first temperature threshold according to the temperature data of each of batteries, and instruct connection switching of the plurality of relays in the relay group if the battery pack temperature is lower than the first temperature threshold, such that the external power source is electrically connected to the battery pack output power source interface module by the external power source interface module, to start a charging preheating before batteries are charged;
• and
• M3, configured to determine, when the external power source interface module is not connected to the external power source, whether the battery pack temperature is lower than a second temperature threshold according to the temperature data of each of batteries, and instruct connection switching of the plurality of relays in the relay group if the battery pack temperature is lower than the second temperature threshold, to start a discharging preheating;
• during the charging preheating, the external power source interface module is at least electrically connected to the first heater;
• and
• during the discharging preheating, the battery pack output power source interface module is at least electrically connected to the second heater.