Battery cell module, battery pack and manufacturing method

The invention discloses a battery cell module, a battery pack and a manufacturing method. The battery cell module comprises a battery cell unit and a liquid cooling structure, the liquid cooling structure comprises a plurality of liquid cooling laminates which are stacked at intervals and liquid cooling side plates arranged between the adjacent liquid cooling laminates, two adjacent liquid cooling laminates and the liquid cooling side plates between the two adjacent liquid cooling laminates form a U-shaped layer cavity, and the U-shaped opening directions of the two adjacent layer cavities are opposite. A plurality of battery cell units are arranged in the layer cavity, the two large side surfaces and the bottom surface of each battery cell unit are attached to the inner surface of the layer cavity, a liquid inlet and a liquid outlet are formed in the liquid cooling structure, and a heat dissipation flow channel is formed in the liquid cooling structure, so that cooling liquid flowing in from the liquid inlet