Battery module

1. A battery module, comprising:

a box having an inner cavity;

at least two battery unit array structures, each of the at least two battery unit array structures comprising a plurality of battery units arranged along a length direction (X); and

at least two support components, each of the at least two support components being fixed to a side of one of the at least two battery unit array structures in a height direction (Z),

wherein the at least two battery unit array structures are arranged along a width direction (Y) and correspond to the at least two support components in one-to-one correspondence, and

the at least two battery unit array structures and the at least two support components are disposed in the inner cavity,

each of the at least two support components has a flat plate structure, and

the box comprises at least two recessed portions, and each of the at least two support components is disposed in a corresponding one of the at least two recessed portions.

2. The battery module according to claim 1 , wherein each of the at least two recessed portions has a depth greater than or equal to a thickness of a corresponding one of the at least two support components.

3. The battery module according to claim 1 , wherein the box comprises two recessed portions, and the two recessed portions are arranged along the width direction (Y), and the box has two opposite ends along the width direction (Y),

a first rib is formed between the two recessed portions, and a second rib is form between one of the two recessed portions and a corresponding one of the two opposite ends, and

one of the at least two battery unit array structures abuts against the first rib and the second rib.

4. The battery module according to claim 1 , wherein each of the at least two support components serves as a cooling plate for the battery module.

5. The battery module according to claim 1 , wherein in the width direction (Y), a distance between each of the plurality of battery units and a side wall of the box is smaller than 10 mm.

6. The battery module according to claim 1 , wherein the at least two battery unit array structures comprise a first battery unit array structure and a second battery unit array structure,

wherein the first battery unit array structure comprises the plurality of battery units and a plurality of first bus bars, and the second battery unit array structure comprises the plurality of battery units and a plurality of second bus bars, and

the plurality of first bus bars is disposed at a side of the first battery unit array structure in the width direction (Y), and the plurality of second bus bars ( 241 ) is disposed at a side of the second battery unit array structure ( 24 ) in the width direction (Y).

7. The battery module according to claim 1 , wherein each of the plurality of battery units comprises a case, a cover plate and electrode terminals,

the case is fixedly connected to the cover plate, and the electrode terminals are provided on the cover plate and configured to be connected to bus bars,

the first battery unit array structure comprises the plurality of battery units and a plurality of first bus bars, and the second battery unit array structure comprises the plurality of battery units and a plurality of second bus bars;

the electrode terminals of the first battery unit array structure face towards the second battery unit array structure, and/or the electrode terminals of the second battery unit array structure face towards the first battery unit array structure.

8. The battery module according to claim 1 , wherein each of the plurality of battery units comprises a case, a cover plate and electrode terminals,

the case is fixedly connected to the cover plate, and the electrode terminals are provided on the cover plate and configured to be connected to bus bars,

the first battery unit array structure comprises the plurality of battery units and a plurality of first bus bars, and the second battery unit array structure comprises the plurality of battery units and a plurality of second bus bars;

the electrode terminals of the first battery unit array structure face away from the second battery unit array structure, and/or the electrode terminals of the second battery unit array structure face away from the first battery unit array structure.

9. The battery module according to claim 1 , wherein each of the plurality of battery units comprises a case and an electrode assembly disposed in the case,

the electrode assembly comprises a first electrode plate, a second electrode plate and a separator disposed between the first electrode plate and the second electrode plate,

the first electrode plate, the second electrode plate and the separator are wound to form the electrode assembly having two flat outer surfaces that are arranged opposite to each other in the height direction (Z); or the first electrode plate, the second electrode plate and the separator are stacked in the height direction (Z).

10. The battery module according to claim 9 , wherein an adhesive is provided between each of the at least two battery unit array structures and a corresponding one of the at least two support components, in such a manner that the at least two connect battery unit array structures are fixed to the at least two support components through the adhesive.

11. The battery module according to claim 1 , wherein along the height direction (Z), the box comprises an upper box and a lower box disposed below the upper box, and

the at least two recessed portions are disposed at the lower box.