Battery apparatus, energy storage apparatus, energy storage system, electric apparatus, and charging network

A battery apparatus, comprising an energy unit and a sampling assembly;

• wherein
• the energy unit comprises a conductive casing and a plurality of pouch battery cells arranged side by side in the casing, each one of the plurality of pouch battery cells comprises a bag and an electrode assembly housed in the bag, the bag comprises a sealed portion formed through thermal pressing of edges of the bag, an accommodating space is formed in the casing, and the pouch battery cell is accommodated in the accommodating space;
• for each one of the plurality of pouch battery cells, the pouch battery cell comprises a first electrode lead-out part and a second electrode lead-out part with opposite polarities, the first electrode lead-out part and the second electrode lead-out part both extend outside the bag and are respectively located at two end faces of the pouch battery cell opposite along the first direction;
• the first electrode lead-out part of at least one of the pouch battery cell is electrically connected to the casing, and the second electrode lead-out part is insulated from the casing;
• the sampling assembly is electrically connected to the second electrode lead-out part and the casing;
• the casing comprises:
• a connecting part, the connecting part is configured to electrically connect to the sampling assembly, a distance between the first electrode lead-out part and the second electrode lead-out part is larger than a distance between the connecting part and the second electrode lead-out part;
• a first opening;
• two second openings opposite along a first direction, wherein the first opening is located on a side of the two second openings along a second direction and communicates with the two second openings, the second direction intersecting the first direction;
• and
• a first casing wall, the first casing wall is opposite to the first opening along the second direction,
• wherein the energy unit comprises:
• a first electrode connecting part and a second electrode connecting part respectively located at two ends of the first casing wall along the first direction, the first electrode connecting part is connected to both the first electrode lead-out part and the casing, so that the first electrode lead-out part is indirectly electrically connected to the casing through the first electrode connecting part, the sampling assembly is located on an outer side of the first casing wall facing away from the accommodating space, and the sampling assembly is electrically connected to both the second electrode connecting part and the casing.