A lithium battery cell capable of exhausting a gas includes a battery cell with an opening for discharging the gas, and an exhaust structure combined to the battery cell and having a tube sleeve, a stop portion and a plug. The tube sleeve is installed to the opening of the battery cell; the stop portion is disposed at an end of the tube sleeve and has an exhaust end communicated with the tube sleeve and the outside; the plug is installed into the tube sleeve to block a side opening of the tube sleeve, blocked by the stop portion to prevent it from separating from the tube sleeve, and pushed by the gas to release its connection with the tube sleeve; and a gap is formed between the plug and the tube sleeve to allow the gas to flow through and exit from the exhaust vent to the outside.

The present invention provides a secondary battery including: a housing, the housing being provided with an explosion proof valve at a bottom thereof; a cell pallet received in the housing and located at a bottom of the housing, the cell pallet being provided with a first through-hole and at least one grooves, the first through-hole being aligned with the explosion proof valve and extending through the cell pallet to communicate a space above the cell pallet and a space below the cell pallet, the at least one grooves being provided on an upper surface and/or a lower surface of the cell pallet, and the first through-hole communicating with at least one side edge of the cell pallet through the at least one grooves; a bare cell received in the housing and seated on the cell pallet; and a top cover assembled to a top side of the housing.

A battery includes a bottomed cylindrical case body that accommodates an electrode body and a bottom-portion insulating plate (19) that is disposed between the electrode body and a bottom portion of the case body. The bottom portion of the case body has a gas discharge port that opens when an internal pressure of the battery reaches a predetermined pressure. The bottom-portion insulating plate (19) has a through hole. An aperture ratio, which is a ratio of an area of the through hole with respect to a total area of the insulating plate, is greater than or equal to 10% and less than or equal to 40%. A Young's modulus of the bottom-portion insulating plate at 25° C. is 10 GPa or greater.

A battery housing includes an inner chamber configured to accommodate galvanic cells, in particular lithium-ion cells, which are provided with a cut-out area that can be opened in the event of failure of the cell. In order to prevent, retard and optionally at least partially extinguish a fire in the event of the failure of one or more cells, for example during an accident of an electrically operated vehicle, the inner chamber of the battery housing includes at least one dispenser for dispensing a flame-inhibiting, flame-retarding and/or flame-extinguishing agent. The dispenser has at least one dispenser opening arranged adjacent to a cut-out area of a cell and configured to be opened. The dispenser opening is configured to be opened during a mechanical shock and/or a temperature increase and/or a pressure increase above a predetermined limit value.

A battery module is provided and includes a plurality of rechargeable batteries and a battery cover, wherein the rechargeable batteries are disposed adjacent to each other, each of the rechargeable batteries has a battery case having a wall portion equipped with an open valve that is constructed so as to open when the inner pressure of the battery case rises up to a threshold value, and the battery cover faces the wall portion. The battery cover has a plurality of cover members provided side by side in a direction toward which the rechargeable batteries are disposed adjacent to each other. The cover members include at least adjacent first and second cover members. The first cover member has a first edge portion and the second cover member has a second edge portion overlapped with the first edge portion.

The present invention relates to a battery pack capable of discharging gases in a pouch type battery cell when a gas pressure inside the pouch type battery cell is increased over a reference pressure, the battery pack including: a plurality of pouch type battery cells; a case comprising partitions suppressing the pouch type battery cells from expanding in a thickness direction thereof, wherein the pouch type battery cells are respectively held in spaces defined by the partitions; and a punching unit installed on the case to pierce a portion of surfaces of the pouch type battery cells, which is not supported by the partition, and having pin members of which number is equal to that of the pouch type battery cells.

A battery system, in particular a lithium-ion battery system, comprising a discharge line (AL) with an opening for discharging substances which are produced in the battery system, in particular gases, to the surroundings of the battery system.

According to one embodiment of the present invention, a lithium ion battery having desirable safety performance is provided. The lithium ion battery includes a battery housing, a battery cover assembled to the battery housing, a pressure relief valve coupled to the battery housing and/or battery cover, and a safety device formed on the housing and/or battery cover and fixed to the pressure relief valve. The safety device includes a shielding plate facing the pressure relief valve, a side wall and an air flow channel structure. The side wall extends from the shielding plate and connects with the battery housing or the battery cover. The air flow channel structure is defined in the side wall.

A sealing body according to the present invention is sealing body for a sealed battery including conductive terminal cap, a conductive explosion-proof valve electrically connected to the terminal cap, a conductive terminal plate having an abutting surface abutting the explosion-proof valve, and an insulating plate disposed between the explosion-proof valve and the terminal plate. A welded part between the explosion-proof valve and the terminal plate is formed in the inner part of the abutting surface, and the plan-view shape of the welded part is a shape defining an enclosed region, a C-shape, or a spiral shape. A notch part surrounding the welded part is formed in the terminal plate. The breaking pressure of the welded part is higher than the breaking pressure of the notch part.

The present invention extends to methods, systems, devices, apparatus, and computer program products for protecting against runaway thermal failure of a battery pack. A fireproof container is built with a thermo-sensitive panel cover leading to the outside environment. When battery failure causes temperatures to rise inside one of the compartments, the panel cover material reacts, causing it open, allowing flames and hot gasses to vent and preventing the buildup of heat internally. Internal sensors may detect the activation of the cover material and allow an electric or electronic circuit to isolate the contents of the failed container from the rest of the system.