Battery holder and battery assembly

The utility model belongs to the technical field of batteries, and particularly relates to a battery bracket and a battery assembly. A first containing groove is formed in one side of the battery support in the width direction, a second containing groove is formed in the other side of the battery support in the width direction, a groove opening of the first containing groove is opposite to a groove opening of the second containing groove, and two end faces are oppositely arranged on the battery support in the length direction. When the secondary batteries are placed in the first accommodating groove and the second accommodating groove, one end surface can be flush with the positive electrode end surface or the negative electrode end surface of the secondary battery in the first accommodating groove, and the other end surface can be flush with the positive electrode end surface or the negative electrode end surface of the secondary battery in the second accommodating groove; therefore, the two secondary batter