Liquid cooling system and battery system

A battery system, comprising:

• a liquid cooling system, wherein the liquid cooling system comprises a housing, a battery cell module, and a liquid cooling assembly, the battery cell module comprises a plurality of battery cells, the battery cell module is provided in an inner cavity of the housing, the liquid cooling assembly is provided inside the housing, the liquid cooling assembly comprises one or more coolant conveying pipes and one or more liquid cooling pipes, at least one of the coolant conveying pipes is communicated with at least one of the liquid cooling pipes, an outer side surface of at least one of the liquid cooling pipes is an arc concave surface, the arc concave surface matches an outer side surface of at least one of the battery cells, the arc concave surface is connected to the outer side surface of at least one of the battery cells, a thermally conductive double-sided adhesive tape is provided at a connection position between the arc concave surface and at least one of the battery cells, and a thickness of the thermally conductive double-sided adhesive tape ranges from 0.01 mm to 10 mm;
• a battery cell connection system provided on a top of the battery cell module and electrically connected to each of the battery cells;
• and
• a battery cell control system provided in the inner cavity of the housing and electrically connected to each of the battery cells.