Abstract: A method of locating a failure of coal-rock-concrete based on vector features of a near-field electromagnetic field is provided. The method senses and records the real electromagnetic field vector information in space by arranging a triaxial electromagnetic sensor array around a coal-rock-concrete body, and realizes the localization of the failure areas of the coal-rock-concrete body by establishing an electromagnetic radiation localization model for the failures of the coal-rock concrete body.

Abstract: The present disclosure provides a battery module, which comprises battery units and two side plates. Each battery unit comprises: at least one pouch-type secondary battery; and a fixture securely mounting the at least one pouch-type secondary battery. The two side plates are respectively positioned at two ends of the battery units in a length direction. A first engaging portion is formed between the fixtures of every two adjacent battery units at each end in the length direction. Each side plate has second engaging portions, each second engaging portion is engaged with the corresponding first engaging portion to securely connect each side plate and the every two adjacent battery units, therefore the force of each battery unit received when the battery module is impacted or vibrated is effectively and uniformly dispersed and transferred to the side plates, which improves the structural strength and reliability of the battery module.

Abstract: The present disclosure provides a battery module, which comprises battery units and two side plates. Each battery unit comprises: at least one pouch-type secondary battery; and a fixture securely mounting the at least one pouch-type secondary battery. The two side plates are respectively positioned at two ends of the battery units in a length direction. A first engaging portion is formed between the fixtures of every two adjacent battery units at each end in the length direction. Each side plate has second engaging portions, each second engaging portion is engaged with the corresponding first engaging portion to securely connect each side plate and the every two adjacent battery units, therefore the force of each battery unit received when the battery module is impacted or vibrated is effectively and uniformly dispersed and transferred to the side plates, which improves the structural strength and reliability of the battery module.