Battery module, power battery, and vehicle

A battery module, comprising:

• a plurality of cell layers laminated on each other, each of the plurality of cell layers comprising a plurality of cells arranged in parallel, and each of the plurality of cells having an explosion-proof opening defined thereon, wherein for every two adjacent cell layers of the plurality of cell layers, more than half the number of the explosion-proof openings in one of the two adjacent cell layers face towards a first direction, and more than half the number of the explosion-proof openings in the other one of the two adjacent cell layers face towards a second direction, the first direction being different from the second direction;
• and
• a fixation bracket located at each of two sides of the plurality of cell layers, wherein each of both ends of each of the plurality of cells is fixed to the fixation bracket that is on a same side as the end,
• wherein:
• in the plurality of cell layers, all the explosion-proof openings in an uppermost cell layer face upwards;
• and all the explosion-proof openings in a lowermost cell layer face downwards;
• and
• when the plurality of cell layers comprises three cell layers, all the explosion-proof openings in a middle cell layer of the three cell layers face towards a left side or a right side simultaneously;
• or when the plurality of cell layers comprises four or more cell layers, the explosion-proof openings in any two adjacent cell layers of the four or more cell layers other than an uppermost cell layer and a lowermost cell layer face towards the left side and the right side alternately.

A battery module, comprising:

• a plurality of cell layers laminated on each other, each of the plurality of cell layers comprising a plurality of cells arranged in parallel, and each of the plurality of cells having an explosion-proof opening defined thereon, wherein for every two adjacent cell layers of the plurality of cell layers, more than half the number of the explosion-proof openings in one of the two adjacent cell layers face towards a first direction, and more than half the number of the explosion-proof openings in the other one of the two adjacent cell layers face towards a second direction, the first direction being different from the second direction;
• and
• a fixation bracket located at each of two sides of the plurality of cell layers, wherein each of both ends of each of the plurality of cells is fixed to the fixation bracket that is on a same side as the end,
• wherein:
• in the plurality of cell layers, the explosion-proof opening at a leftmost end of an uppermost cell layer faces towards a left side, the explosion-proof opening at a rightmost end of the uppermost cell layer faces towards a right side, and the explosion-proof openings located between the leftmost end and the rightmost end of the uppermost cell layer face upwards;
• and the explosion-proof opening at a leftmost end of a lowermost cell layer faces towards the left side, the explosion-proof opening at a rightmost end of the lowermost cell layer faces towards the right side, and the explosion-proof openings located between the leftmost end and the rightmost end of the lowermost cell layer face downwards;
• and
• when the plurality of cell layers comprises three cell layers, the explosion-proof opening at a rightmost end of a middle cell layer of the three cell layers faces towards the right side, and the remaining explosion-proof openings in the middle cell layer face towards the left side;
• or the explosion-proof opening at a leftmost end of the middle cell layer of the three cell layers faces towards the left side, and the remaining explosion-proof openings in the middle cell layer face towards the right side.