Abstract: A battery connection structure includes a plurality of battery units connected in series. At least one battery unit is connected in series to other battery units through a temperature switch; the temperature switch includes a first connection member connected to a first electrode terminal of the battery unit and a second connection member connected to a second electrode terminal of the battery unit; at normal operating temperature, the first connection member and the second connection member are disconnected, and the first connection member and the second connection member are respectively connected to the two electrode terminals of the battery unit; when the temperature is higher than the normal operating temperature, the first connection member and/or the second connection member are/is deformed and disconnected from the corresponding electrode terminal(s) of the battery unit, and the first connection member and the second connection member are connected.

Abstract: The disclosure provides an energy storage battery system, including a battery cluster, a first communicating unit and a second communicating unit. The battery cluster includes at least one battery module, and the battery module includes at least one battery cell. The first communicating unit and the second communicating unit are both communicated with the battery cell. The first communicating unit is used to connect with an air extraction device, and the gas in the battery cell and the first communicating unit can be extracted using the air extraction device. The second communicating unit is used to connect with a low-pressure pump, and external cooling fluid can be transmitted to an interior of the battery cell using the low-pressure pump. The disclosure further provides a control method of battery thermal runaway.

Abstract: The disclosure provides an energy storage battery system, including a battery cluster and a first communicating unit. The battery cluster includes at least one battery module, and the battery module includes at least one battery cell. The first communicating unit is used to connect with a high-pressure pump, and external cooling fluid can be pressurized by the high-pressure pump and transmitted to the first communicating unit to cause the first communicating unit to burst, and after the first communicating unit bursts, the cooling fluid is sprayed to the battery cell. The disclosure further provides a control method of battery thermal runaway.

Abstract: A battery cell is provided. The battery cell is provided with circulation elements for circulating between inside and outside of the battery cell, and the circulation elements are connected with the battery cell. Substances inside the battery cell are capable of being discharged out of the battery cell through the circulation elements, and substances outside the battery cell also capable of entering the interior of the battery cell through the circulation elements. The battery cell is carried with its own circulation elements, the battery cell is not injected with electrolyte during production, transportation and assembly, and the electrolyte is injected into the battery cell after the installation of the battery cluster. Therefore, the battery cluster is not charged during transportation and installation of the battery cluster, to eliminate the safety risk of the battery cluster during transportation and installation. A battery unit and a battery cluster are also provided.

Abstract: Provided are a battery pack and an electric vehicle. The battery pack includes a case, a cooling plate assembly and an energy storage unit. The cooling plate assembly and the energy storage unit are arranged inside the case, and the cooling plate assembly at least includes a first cooling plate. The first cooling plate is fixed on the case, and the first cooling plate divides the case, in a Z-direction, into a first accommodating space which is located above the first cooling plate, and a second accommodating space which is located below the first cooling plate. The energy storage unit at least includes a first energy storage unit which is arranged inside the first accommodating space and fixed on the first cooling plate, and a second energy storage unit which is arranged inside the second accommodating space.