A battery pack system is provided with an integrated battery disconnect mechanism. The battery pack system includes a circuit board and one or more battery packs connected to the circuit board. A battery pack of the one or more battery packs is connected to the circuit board via one or more connectors. The battery pack system also includes a disconnect mechanism configured to disconnect the battery pack from the circuit board with a failure event at the battery pack by disconnecting the one or more connectors connecting the battery pack to the circuit board. In an enhanced aspect, the battery pack is suspended from the circuit board by the one or more connectors, and the disconnecting of the one or more connectors by the disconnect mechanism with the failure event releases the battery pack to drop away from the circuit board.

A battery housing can include a housing body defining a cavity sized and shaped to receive a cell for a battery, and a breaker coupled with the housing body. The battery housing can comprise a first electrical conductor at a first end portion of the housing body and electrically connected to the switch, the first electrical conductor configured to electrically connect to a first battery cell terminal of the cell. The battery housing can comprise a second electrical conductor at a second end portion of the housing body, the second electrical conductor configured to electrically connect to a second battery cell terminal of the cell to define a first electrical pathway between the first electrical conductor and the second electrical conductor. The battery housing can include a bypass conductor to define a second electrical pathway between the switch and the second electrical conductor.

Disclosed are a secondary battery and a method for interrupting current of the secondary batter.

According to the present invention, since a bimetal is applied to the secondary battery, when an internal temperature of a secondary battery reaches a predetermined temperature, current may be interrupted even before an internal pressure of the secondary battery reaches a predetermined pressure to effectively interrupt the current in case of emergency, thereby preventing the secondary battery from being exploded or fired.

A breaker 1 includes a fixed piece 2 having a fixed contact 21, a movable piece 4 including a movable contact 41 and having the movable contact 41 so as to be pressed against and in contact with the fixed contact 21, a thermally actuated element 5 shifting the movable piece 4 from a conductive state to a cut-off state in accordance with a temperature change, and a case 7 accommodating the fixed piece 2, the movable piece 4, and the thermally actuated element 5. The case 7 includes a case main body 71 accommodating the movable piece 4 and the thermally actuated element 5, a lid member 81 covering a housing concave portion 73 of the case main body 71, and a metal plate 9 embedded in the lid member 81. Heat capacity of the metal plate 9 is larger than heat capacity of the fixed piece 2.

A safety element is provided to a lead connected part of a battery module in the event of overcharge, to improve safety of the battery module. The battery module according to the present disclosure includes two or more battery cells, and the battery module includes a current shut-off battery cell which electrically connects adjacent first and second battery cells, and when overcharge occurs, ruptures to disconnect the electrical connection.

A battery thermal management system includes one or more bimetallic members moveable between a first position and a second position in response to a temperature change to selectively restrict flow of a coolant through a duct.

A battery pack system is provided with an integrated battery disconnect mechanism. The battery pack system includes a circuit board and one or more battery packs connected to the circuit board. A battery pack of the one or more battery packs is connected to the circuit board via one or more connectors. The battery pack system also includes a disconnect mechanism configured to disconnect the battery pack from the circuit board with a failure event at the battery pack by disconnecting the one or more connectors connecting the battery pack to the circuit board. In an enhanced aspect, the battery pack is suspended from the circuit board by the one or more connectors, and the disconnecting of the one or more connectors by the disconnect mechanism with the failure event releases the battery pack to drop away from the circuit board.

Energy storage devices, battery cells, and batteries of the present technology may include an enclosure. The enclosure may house a cathode current collector and a cathode tab coupled with the cathode current collector. A cathode terminal may be accessible at an external location of these devices, and the cathode terminal may be electrically coupled with the cathode tab. The enclosure may also house an anode current collector and an anode tab coupled with the anode current collector. An anode terminal may be accessible at an external location of the devices, and the anode terminal may be electrically coupled with the anode tab. The devices may further include a fuse housed within the enclosure. The fuse may be positioned between the anode terminal and anode tab, and may also be in electrical communication with both the anode terminal and the anode tab.

The present disclosure relates to a lithium secondary battery having improved safety. In the lithium secondary battery, the property of a bimetal bent in one direction at high temperature under an abnormal operating condition is used to cause a disconnection between an electrode tab and an electrode lead and to increase the internal resistance of a unit cell, thereby improving the safety of a lithium secondary battery.

A solid state battery (10) including a stack of cells (22), each cell comprising a positive electrode (12), a negative electrode (14) and a solid electrolyte (16) disposed between the positive electrode (12) and the negative electrode (14), wherein a current collector (18) is disposed between the negative electrode (14) of a first cell (20A) and the positive electrode (12) of a second cell (20B), the second cell (20B) being adjacent to the first cell (20A), the solid state battery (10) comprising an ionic conductor (26) having two configurations, a normal configuration wherein the ionic conductor (26) is not in contact with the current collector (18) and a short-circuit configuration wherein the ionic conductor (26) is in contact with the current collector (18), the negative electrode (14) of the first cell (20A) and the positive electrode (12) of the second cell (20B) and wherein the ionic conductor (26) has an ionic conductivity which smaller than an electronic conductivity of the current collector (18).